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Note: This page contains sample records for the topic "in-plane circular configuration" 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.


1

Configurations The  

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

in Testing Configurations The PSEL's infrastructure addresses critical issues of PV reliability and power availability. The lab offers four different load configuration...

2

Membrane Fuzzy Sphere Dynamics in Plane-Wave Matrix Model  

E-Print Network [OSTI]

In plane-wave matrix model, the membrane fuzzy sphere extended in the SO(3) symmetric space is allowed to have periodic motion on a sub-plane in the SO(6) symmetric space. We consider a background configuration composed of two such fuzzy spheres moving on the same sub-plane and the one-loop quantum corrections to it. The one-loop effective action describing the fuzzy sphere interaction is computed up to the sub-leading order in the limit that the mean distance $r$ between two fuzzy spheres is very large. We show that the leading order interaction is of the 1/r^7 type and thus the membrane fuzzy spheres interpreted as giant gravitons really behave as gravitons.

Hyeonjoon Shin; Kentaroh Yoshida

2004-09-03T23:59:59.000Z

3

Module Configuration  

DOE Patents [OSTI]

A stand alone battery module including: (a) a mechanical configuration; (b) a thermal management configuration; (c) an electrical connection configuration; and (d) an electronics configuration. Such a module is fully interchangeable in a battery pack assembly, mechanically, from the thermal management point of view, and electrically. With the same hardware, the module can accommodate different cell sizes and, therefore, can easily have different capacities. The module structure is designed to accommodate the electronics monitoring, protection, and printed wiring assembly boards (PWAs), as well as to allow airflow through the module. A plurality of modules may easily be connected together to form a battery pack. The parts of the module are designed to facilitate their manufacture and assembly.

Oweis, Salah (Ellicott City, MD); D'Ussel, Louis (Bordeaux, FR); Chagnon, Guy (Cockeysville, MD); Zuhowski, Michael (Annapolis, MD); Sack, Tim (Cockeysville, MD); Laucournet, Gaullume (Paris, FR); Jackson, Edward J. (Taneytown, MD)

2002-06-04T23:59:59.000Z

4

Circular, confined distribution for charged particle beams  

DOE Patents [OSTI]

A charged particle beam line is formed with magnetic optics that manipulate the charged particle beam to form the beam having a generally rectangular configuration to a circular beam cross-section having a uniform particle distribution at a predetermined location. First magnetic optics form a charged particle beam to a generally uniform particle distribution over a square planar area at a known first location. Second magnetic optics receive the charged particle beam with the generally square configuration and affect the charged particle beam to output the charged particle beam with a phase-space distribution effective to fold corner portions of the beam toward the core region of the beam. The beam forms a circular configuration having a generally uniform spatial particle distribution over a target area at a predetermined second location.

Garnett, Robert W. (Los Alamos, NM); Dobelbower, M. Christian (Toledo, OH)

1995-01-01T23:59:59.000Z

5

Circular, confined distribution for charged particle beams  

DOE Patents [OSTI]

A charged particle beam line is formed with magnetic optics that manipulate the charged particle beam to form the beam having a generally rectangular configuration to a circular beam cross-section having a uniform particle distribution at a predetermined location. First magnetic optics form a charged particle beam to a generally uniform particle distribution over a square planar area at a known first location. Second magnetic optics receive the charged particle beam with the generally square configuration and affect the charged particle beam to output the charged particle beam with a phase-space distribution effective to fold corner portions of the beam toward the core region of the beam. The beam forms a circular configuration having a generally uniform spatial particle distribution over a target area at a predetermined second location. 26 figs.

Garnett, R.W.; Dobelbower, M.C.

1995-11-21T23:59:59.000Z

6

Elliptic and circular wormholes  

E-Print Network [OSTI]

Two new exact analytical solutions of the euclidean Einstein equations for a minimal massless scalar field and negative cosmological constant have been obtained. These solutions are given in terms of Jacobian elliptic or circular functions, rather than hyperbolic functions, connect large asymptotic regions of maximally-symmetric anti-DeSitter metrics through a microscopic throat, and correspond to negative definite components of the Ricci tensor. Therefore, they describe wormhole-like changes of topology driven by nucleation of baby universes. The quantum state of such elliptic and circular wormholes or handles is discussed in the most interesting inner and asymptotic regions.

P. F. González-Díaz

1993-06-25T23:59:59.000Z

7

Realizing in-plane surface diffraction by x-ray multiple-beam diffraction with large incidence angle  

SciTech Connect (OSTI)

Based on rigorous dynamical-theory calculations, we demonstrate the principle of an x-ray multiple-beam diffraction (MBD) scheme that overcomes the long-lasting difficulties of high-resolution in-plane diffraction from crystal surfaces. This scheme only utilizes symmetric reflection geometry with large incident angles but activates the out-of-plane and in-plane diffraction processes simultaneously and separately in the continuous MBD planes. The in-plane diffraction is realized by detoured MBD, where the intermediate diffracted waves propagate parallel to the surface, which corresponds to an absolute Bragg surface diffraction configuration that is extremely sensitive to surface structures. A series of MBD diffraction and imaging techniques may be developed from this principle to study surface/interface (misfit) strains, lateral nanostructures, and phase transitions of a wide range of (pseudo)cubic crystal structures, including ultrathin epitaxial films and multilayers, quantum dots, strain-engineered semiconductor or (multi)ferroic materials, etc.

Huang, Xian-Rong, E-mail: xiahuang@aps.anl.gov; Gog, Thomas; Assoufid, Lahsen [Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Peng, Ru-Wen, E-mail: rwpeng@nju.edu.cn [National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093 (China); Siddons, D. P. [National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973 (United States)

2014-11-03T23:59:59.000Z

8

Analysis of the multipactor effect in circular waveguides excited by two orthogonal polarization waves  

SciTech Connect (OSTI)

Circular waveguides, either employed as resonant cavities or as irises connecting adjacent guides, are widely present in many passive components used in different applications (i.e., particle accelerators and satellite subsystems). In this paper, we present the study of the multipactor effect in circular waveguides considering the coexistence of the two polarizations of the fundamental TE{sub 11} circular waveguide mode. For a better understanding of the problem, only low multipactor orders have been explored as a function of the polarization ellipse eccentricity. Special attention has been paid to the linear and circular polarizations, but other more general configurations have also been explored.

Pérez, A. M.; Boria, V. E. [Departamento de Comunicaciones-iTEAM, Universidad Politécnica de Valencia Camino de Vera s/n, 46022 Valencia (Spain); Gimeno, B. [Departamento de Física Aplicada y Electromagnetismo-ICMUV, Universitat de Valčncia c/Dr. Moliner, 50, 46100 Valencia (Spain); Anza, S.; Vicente, C.; Gil, J. [Aurora Software and Testing S.L., Edificio de Desarrollo Empresarial 9B, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia (Spain)

2014-08-15T23:59:59.000Z

9

COMPARISON OF MICRO-INCH IN-PLANE AND OUT-OF-PLANE RESPONSE OF CRACKS  

E-Print Network [OSTI]

limestone quarries. In two locations, sensors that measure in-plane and normal displacement were installed

10

Circular chemiresistors for microchemical sensors  

DOE Patents [OSTI]

A circular chemiresistor for use in microchemical sensors. A pair of electrodes is fabricated on an electrically insulating substrate. The pattern of electrodes is arranged in a circle-filling geometry, such as a concentric, dual-track spiral design, or a circular interdigitated design. A drop of a chemically sensitive polymer (i.e., chemiresistive ink) is deposited on the insulating substrate on the electrodes, which spreads out into a thin, circular disk contacting the pair of electrodes. This circularly-shaped electrode geometry maximizes the contact area between the pair of electrodes and the polymer deposit, which provides a lower and more stable baseline resistance than with linear-trace designs. The circularly-shaped electrode pattern also serves to minimize batch-to-batch variations in the baseline resistance due to non-uniform distributions of conductive particles in the chemiresistive polymer film.

Ho, Clifford K. (Albuquerque, NM)

2007-03-13T23:59:59.000Z

11

Nuclear spin circular dichroism  

SciTech Connect (OSTI)

Recent years have witnessed a growing interest in magneto-optic spectroscopy techniques that use nuclear magnetization as the source of the magnetic field. Here we present a formulation of magnetic circular dichroism (CD) due to magnetically polarized nuclei, nuclear spin-induced CD (NSCD), in molecules. The NSCD ellipticity and nuclear spin-induced optical rotation (NSOR) angle correspond to the real and imaginary parts, respectively, of (complex) quadratic response functions involving the dynamic second-order interaction of the electron system with the linearly polarized light beam, as well as the static magnetic hyperfine interaction. Using the complex polarization propagator framework, NSCD and NSOR signals are obtained at frequencies in the vicinity of optical excitations. Hartree-Fock and density-functional theory calculations on relatively small model systems, ethene, benzene, and 1,4-benzoquinone, demonstrate the feasibility of the method for obtaining relatively strong nuclear spin-induced ellipticity and optical rotation signals. Comparison of the proton and carbon-13 signals of ethanol reveals that these resonant phenomena facilitate chemical resolution between non-equivalent nuclei in magneto-optic spectra.

Vaara, Juha, E-mail: juha.vaara@iki.fi [NMR Research Group, Department of Physics, University of Oulu, P.O. Box 3000, FIN-90014 Oulu (Finland)] [NMR Research Group, Department of Physics, University of Oulu, P.O. Box 3000, FIN-90014 Oulu (Finland); Rizzo, Antonio [Istituto per i Processi Chimico-Fisici del Consiglio Nazionale delle Ricerche (IPCF-CNR), Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa (Italy)] [Istituto per i Processi Chimico-Fisici del Consiglio Nazionale delle Ricerche (IPCF-CNR), Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa (Italy); Kauczor, Joanna; Norman, Patrick [Department of Physics, Chemistry and Biology, Linköping University, S-58183 Linköping (Sweden)] [Department of Physics, Chemistry and Biology, Linköping University, S-58183 Linköping (Sweden); Coriani, Sonia, E-mail: coriani@units.it [Dipartimento di Scienze Chimiche e Farmaceutiche, Universitŕ degli Studi di Trieste, Via L. Giorgieri 1, I-34127 Trieste (Italy)] [Dipartimento di Scienze Chimiche e Farmaceutiche, Universitŕ degli Studi di Trieste, Via L. Giorgieri 1, I-34127 Trieste (Italy)

2014-04-07T23:59:59.000Z

12

CONFIGURATION MANAGEMENT (CM)  

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

Safety systems and mission critical systems are defined and a comprehensive Configuration Management systemprocedure to maintain control over the design and modifications of these...

13

Magnetization reversal assisted by half antivortex states in nanostructured circular cobalt disks  

SciTech Connect (OSTI)

The half antivortex, a fundamental topological structure which determines magnetization reversal of submicron magnetic devices with domain walls, has been suggested also to play a crucial role in spin torque induced vortex core reversal in circular disks. Here, we report on magnetization reversal in circular disks with nanoholes through consecutive metastable states with half antivortices. In-plane anisotropic magnetoresistance and broadband susceptibility measurements accompanied by micromagnetic simulations reveal that cobalt (Co) disks with two and three linearly arranged nanoholes directed at 45° and 135° with respect to the external magnetic field show reproducible step-like changes in the anisotropic magnetoresistance and magnetic permeability due to transitions between different intermediate states mediated by vortices and half antivortices confined to the dot nanoholes and edges, respectively. Our findings are relevant for the development of multi-hole based spintronic and magnetic memory devices.

Lara, A.; Aliev, F. G., E-mail: farkhad.aliev@uam.es [Dpto. Física de la Materia Condensada, Instituto Nicolas Cabrera (INC) and Condensed Matter Physics Institute (IFIMAC), Universidad Autónoma de Madrid, Madrid (Spain); Dobrovolskiy, O. V. [Physikalisches Institut, Goethe University, Frankfurt am Main (Germany); Physics Department, V. Karazin National University, Kharkiv (Ukraine); Prieto, J. L. [Instituto de Sistemas Optoelectrónicos y Microtecnología (ISOM), Universidad Politecnica de Madrid (Spain); Huth, M. [Physikalisches Institut, Goethe University, Frankfurt am Main (Germany)

2014-11-03T23:59:59.000Z

14

Circular permutant GFP insertion folding reporters  

SciTech Connect (OSTI)

Provided are methods of assaying and improving protein folding using circular permutants of fluorescent proteins, including circular permutants of GFP variants and combinations thereof. The invention further provides various nucleic acid molecules and vectors incorporating such nucleic acid molecules, comprising polynucleotides encoding fluorescent protein circular permutants derived from superfolder GFP, which polynucleotides include an internal cloning site into which a heterologous polynucleotide may be inserted in-frame with the circular permutant coding sequence, and which when expressed are capable of reporting on the degree to which a polypeptide encoded by such an inserted heterologous polynucleotide is correctly folded by correlation with the degree of fluorescence exhibited.

Waldo, Geoffrey S; Cabantous, Stephanie

2013-02-12T23:59:59.000Z

15

Circular permutant GFP insertion folding reporters  

SciTech Connect (OSTI)

Provided are methods of assaying and improving protein folding using circular permutants of fluorescent proteins, including circular permutants of GFP variants and combinations thereof. The invention further provides various nucleic acid molecules and vectors incorporating such nucleic acid molecules, comprising polynucleotides encoding fluorescent protein circular permutants derived from superfolder GFP, which polynucleotides include an internal cloning site into which a heterologous polynucleotide may be inserted in-frame with the circular permutant coding sequence, and which when expressed are capable of reporting on the degree to which a polypeptide encoded by such an inserted heterologous polynucleotide is correctly folded by correlation with the degree of fluorescence exhibited.

Waldo, Geoffrey S. (Santa Fe, NM); Cabantous, Stephanie (Los Alamos, NM)

2008-06-24T23:59:59.000Z

16

Circular permutant GFP insertion folding reporters  

SciTech Connect (OSTI)

Provided are methods of assaying and improving protein folding using circular permutants of fluorescent proteins, including circular permutants of GFP variants and combinations thereof. The invention further provides various nucleic acid molecules and vectors incorporating such nucleic acid molecules, comprising polynucleotides encoding fluorescent protein circular permutants derived from superfolder GFP, which polynucleotides include an internal cloning site into which a heterologous polynucleotide may be inserted in-frame with the circular permutant coding sequence, and which when expressed are capable of reporting on the degree to which a polypeptide encoded by such an inserted heterologous polynucleotide is correctly folded by correlation with the degree of fluorescence exhibited.

Waldo, Geoffrey S.; Cabantous, Stephanie

2013-04-16T23:59:59.000Z

17

Circular permutant GFP insertion folding reporters  

SciTech Connect (OSTI)

Provided are methods of assaying and improving protein folding using circular permutants of fluorescent proteins, including circular permutants of GFP variants and combinations thereof. The invention further provides various nucleic acid molecules and vectors incorporating such nucleic acid molecules, comprising polynucleotides encoding fluorescent protein circular permutants derived from superfolder GFP, which polynucleotides include an internal cloning site into which a heterologous polynucleotide may be inserted in-frame with the circular permutant coding sequence, and which when expressed are capable of reporting on the degree to which a polypeptide encoded by such an inserted heterologous polynucleotide is correctly folded by correlation with the degree of fluorescence exhibited.

Waldo, Geoffrey S. (Santa Fe, NM); Cabantous, Stephanie (Los Alamos, NM)

2011-06-14T23:59:59.000Z

18

Dirac GPU Cluster Configuration  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to UserProduct: CrudeOfficeNERSCDiesel prices top $4Configuration Node and

19

Delamination characterization of composite plates with holes/inclusions under general in-plane loading  

E-Print Network [OSTI]

DELAMINATION CHARACTERIZATION OF COMPOSITE PLATES WITH HOLES/INCLUSIONS UNDER GENERAL IN ? PLANE LOADING A Thesis by RONALD BENSE Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 1989 KIaj or Subject: Mechanical Engineering DELAMINATION CHARACTERIZATION OF COMPOSITE PLATES WITH HOLES/INCLUSIONS UNDER GENERAL IN ? PLANE LOADING A Thesis by RONALD BENSE Approved as to style and content by...

Bense, Ronald

2012-06-07T23:59:59.000Z

20

Power converter connection configuration  

DOE Patents [OSTI]

EMI shielding is provided for power electronics circuits and the like via a direct-mount reference plane support and shielding structure. The thermal support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support. The support forms a shield from both external EMI/RFI and from interference generated by operation of the power electronic circuits. Features may be provided to permit and enhance connection of the circuitry to external circuitry, such as improved terminal configurations. Modular units may be assembled that may be coupled to electronic circuitry via plug-in arrangements or through interface with a backplane or similar mounting and interconnecting structures.

Beihoff, Bruce C. (Wauwatosa, WI); Kehl, Dennis L. (Milwaukee, WI); Gettelfinger, Lee A. (Brown Deer, WI); Kaishian, Steven C. (Milwaukee, WI); Phillips, Mark G. (Brookfield, WI); Radosevich, Lawrence D. (Muskego, WI)

2008-11-11T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Energy spectra of two electrons in a circular quantum dot  

E-Print Network [OSTI]

The electron interaction energy of two interacting electrons in a circular quantum dot (with hard wall confinement) is investigated in the framework of the semi-classical Wentzel-Kramers-Brillouin (WKB) approximation. The two electrons are assumed to be in an infinitely deep well of radius $r_0$, in a simple configuration with one electron fixed at the origin. The corresponding Schrodinger equation, with hard wall boundary conditions, is also solved exactly by numerical integration. It is observed that the agreement between the two energy values is quite good, suggesting that the WKB approximation works well for such a confined quantum system as well. This may provide motivation to extend this to more realistic confined potentials.

Anjana Sinha; Y. P. Varshni

2002-08-27T23:59:59.000Z

22

Vibrations of circular steel plates with damping  

E-Print Network [OSTI]

distributed. Usually, the prime objection to vibrations produced by machines is their effect on humans. These are high frequency vibrations that produce troublesome noise. Low frequency vibrations are often trans- mitted and these may damage nearby... materials used with fans, motors, engines, presses, turbines and similar machines. Byars (1)* studied vibrations of a circular plate on three supports for node patterns, amplitudes and frequencies. Ballentine (2) investigated the vibrations of circular...

Sheth, Prafulchandra Naginlal

1967-01-01T23:59:59.000Z

23

Configuration Management Plan | Department of Energy  

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

& Publications SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Software Configuration Management Checklist NMMSS Software Quality Assurance Plan Software Configuration...

24

SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Software Configuration...  

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

SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Software Configuration Management Checklist SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Software Configuration Management...

25

Demonstration: in-plane scattering of beads on a target; sticky marbles; Geiger counter and sources  

E-Print Network [OSTI]

Demonstration: in-plane scattering of beads on a target; sticky marbles; Geiger counter and sources, and the hole is about 5 cm in diameter. In the demo, 20 beads are rolled at random positions, and about 5 fall with no top or bottom. We drop 10,000 sticky marbles at random into the box, covering an area 1 m by 1 m

Boal, David

26

Numerical simulations of heat transfer in plane channel flow Najla EL GHARBI 1, 3, a  

E-Print Network [OSTI]

Numerical simulations of heat transfer in plane channel flow Najla EL GHARBI 1, 3, a , Rafik ABSI 2 abenzaoui@gmail.com Keywords: turbulent flows, heat transfer, forced convection, low Reynolds number model data for Re = 150. Introduction Turbulent flow with heat transfer mechanism is of great importance from

Paris-Sud XI, Université de

27

Water dimer hydrogen bond stretch, donor torsion overtone, and ``in-plane bend'' vibrations  

E-Print Network [OSTI]

Water dimer hydrogen bond stretch, donor torsion overtone, and ``in-plane bend'' vibrations Frank N. Brown Los Alamos National Laboratory, Los Alamos, New Mexico 87545 Heather A. Harker and Poul B. © 2003 American Institute of Physics. DOI: 10.1063/1.1614774 I. INTRODUCTION Water clusters have been

Cohen, Ronald C.

28

SUBCRITICAL INSTABILITIES IN PLANE COUETTE FLOW OF VISCO-ELASTIC FLUIDS  

E-Print Network [OSTI]

SUBCRITICAL INSTABILITIES IN PLANE COUETTE FLOW OF VISCO-ELASTIC FLUIDS Alexander N. Morozov of an eigenfunction of the linearized equations of motion becomes subcritically unstable, and the threshold value, subcritical instabilities, amplitude equation Introduction In the last decades, stability of flows of polymers

van Saarloos, Wim

29

Role of anisotropy configuration in exchange-biased systems.  

SciTech Connect (OSTI)

We present a systematic study of the anisotropy configuration effects on the magnetic properties of exchange-biased ferromagnetic/antiferromagnetic (FM/AFM) Co/IrMn bilayers. The interfacial unidirectional anisotropy is set extrinsically via a field cooling procedure with the magnetic field misaligned by an angle {beta}{sub FC} with respect to the intrinsic FM uniaxial anisotropy. High resolution angular dependence in-plane resolved Kerr magnetometry measurements have been performed for three different anisotropy arrangements, including collinear {beta}{sub FC} = 0 and two opposite noncollinear cases. The symmetry breaking of the induced noncollinear configurations results in a peculiar nonsymmetric magnetic behavior of the angular dependence of magnetization reversal, coercivity, and exchange bias. The experimental results are well reproduced without any fitting parameter by using a simple model including the induced anisotropy configuration. Our finding highlights the importance of the relative angle between anisotropies in order to properly account for the magnetic properties of exchange-biased FM/AFM systems.

Jimenez, E.; Camarero, J.; Perna, P.; Mikuszeit, N.; Teran, F. J.; Sort, J.; Nogues, J.; Garcia-Martin, J. M.; Hoffmann, A.; Dieny, B.; Miranda, R. (Materials Science Division); (Univ. Autonoma de Madrid); (Univ. Autonoma de Barcelona); (SPINTEC); (Inst. de Microelectronica de Madrid)

2011-01-01T23:59:59.000Z

30

Radiant-interchange configuration factors  

E-Print Network [OSTI]

RADIANT-INTERCHANGE CONFIGURATION FACTORS A Thesis By THOMAS E DW ARD RE D DIN Submitted to the Graduate College of the Texas A)M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE January 1965 Major... wife, Dorene, whose patience and encouragement have been a constant source of inspiration. TABLE OF CONTENTS CHAPTER I . INTRODUCTION PAGE ~ 0 1 II. THE GEOMETRY OF THE BLACK BODY CONFIGURATION FACTOR. . . , . . . . . . . . . . . . . . . . 3 1...

Reddin, Thomas Edward

1965-01-01T23:59:59.000Z

31

On the properties of Circular-Beams  

E-Print Network [OSTI]

Circular-Beams were introduced as a very general solution of the paraxial wave equation carrying Orbital Angular Momentum. Here we study their properties, by looking at their normalization and their expansion in terms of Laguerre-Gauss modes. We also study their far-field divergence and, for particular cases of the beam parameters, their possible experimental generation.

Giuseppe Vallone

2015-01-28T23:59:59.000Z

32

Circular 57 Streptococcal Infections of Fish1  

E-Print Network [OSTI]

, and striped bass (Inglis et al. 1993). Strep has also been isolated from a variety of ornamental fishCircular 57 Streptococcal Infections of Fish1 Roy P.E. Yanong and Ruth Francis-Floyd2 1 of the common disease-causing bacteria of fish are Gram-negative (appear pink with a Gram stain

Watson, Craig A.

33

Pump-probe measurements of the thermal conductivity tensor for materials lacking in-plane symmetry  

SciTech Connect (OSTI)

We previously demonstrated an extension of time-domain thermoreflectance (TDTR) which utilizes offset pump and probe laser locations to measure in-plane thermal transport properties of multilayers. However, the technique was limited to systems of transversely isotropic materials studied using axisymmetric laser intensities. Here, we extend the mathematics so that data reduction can be performed on non-transversely isotropic systems. An analytic solution of the diffusion equation for an N-layer system is given, where each layer has a homogenous but otherwise arbitrary thermal conductivity tensor and the illuminating spots have arbitrary intensity profiles. As a demonstration, we use both TDTR and time-resolved magneto-optic Kerr effect measurements to obtain thermal conductivity tensor elements of <110> ?-SiO{sub 2}. We show that the out-of-phase beam offset sweep has full-width half-maxima that contains nearly independent sensitivity to the in-plane thermal conductivity corresponding to the scanning direction. Also, we demonstrate a Nb-V alloy as a low thermal conductivity TDTR transducer layer that helps improve the accuracy of in-plane measurements.

Feser, Joseph P. [Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716 (United States); Liu, Jun; Cahill, David G. [Department of Materials Science and Engineering, and Frederick-Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States)

2014-10-15T23:59:59.000Z

34

Configuration  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to User Group andCompositional VariationCluster) |About Us2.1Conferencing

35

NOAA Technical Report NMFS Circular 450 The Utility of Developmental  

E-Print Network [OSTI]

#12;450 NOAA Technical Report NMFS Circular 450 The Utility of Developmental Osteology in Taxonomic Report NMFS Circular 450 The Utility of Developmental Osteology in Taxonomic and Systematic Studies .................................................................. .... 13 Scales and lateral line pores

36

Policy Flash 2014-38 Federal Acquisition Circular (FAC) 2005...  

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

8 Federal Acquisition Circular (FAC) 2005-76 Policy Flash 2014-38 Federal Acquisition Circular (FAC) 2005-76 Questions concerning this policy flash should be directed to Jason...

37

POLICY FLASH 2014-31 Federal Acquisition Circulars (FACs) 2005...  

Office of Environmental Management (EM)

POLICY FLASH 2014-31 Federal Acquisition Circulars (FACs) 2005-73 and 2005-74 POLICY FLASH 2014-31 Federal Acquisition Circulars (FACs) 2005-73 and 2005-74 Questions concerning...

38

CRAD, Configuration Management - Oak Ridge National Laboratory...  

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

Configuration Management - Oak Ridge National Laboratory High Flux Isotope Reactor CRAD, Configuration Management - Oak Ridge National Laboratory High Flux Isotope Reactor February...

39

CRAD, Configuration Management - Oak Ridge National Laboratory...  

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

Configuration Management - Oak Ridge National Laboratory High Flux Isotope Reactor Contractor ORR CRAD, Configuration Management - Oak Ridge National Laboratory High Flux Isotope...

40

CRAD, Configuration Management Assessment Plan  

Broader source: Energy.gov [DOE]

The objective of this assessment is to determine whether a Configuration Management Program (CM) is in place which allows for the availability and retrievability of accurate information, improves response to design and operational decisions, enhances worker safety, increases facility safety and reliability, increases efficiency of work efforts, and helps maintain integrity of interfacing orders.

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Evaluation of mixing in three duct configurations and development of a Generic Tee Plenum System (GTPS) for application to single point aerosol sampling  

E-Print Network [OSTI]

Company, Red}ands, CA) 17 3. 5 industrial Air Blender 3. 6 Interpretation of the model code for the blender . . . 3. 7 Type IV Air Blender 19 3. 8 Example of location of traverse points in circular or non-circular duct (ANSI/I IPS N13. 1...-lll-l, mode-A. COV for particle concentration profiles . . . . . 82 6. 16 Configuration-111-2, mode-B. COV for particle concentration profiles . . . . . 82 FIGURE Page 6. 17 Configuration-111-3, mode-B. COV for particle concentration profiles downstream...

Han, Tae Won

2003-01-01T23:59:59.000Z

42

Energy of gravitational radiation in plane-symmetric space-times  

E-Print Network [OSTI]

Gravitational radiation in plane-symmetric space-times can be encoded in a complex potential, satisfying a non-linear wave equation. An effective energy tensor for the radiation is given, taking a scalar-field form in terms of the potential, entering the field equations in the same way as the matter energy tensor. It reduces to the Isaacson energy tensor in the linearized, high-frequency approximation. An energy conservation equation is derived for a quasi-local energy, essentially the Hawking energy. A transverse pressure exerted by interacting low-frequency gravitational radiation is predicted.

Sean A. Hayward

2008-05-19T23:59:59.000Z

43

Discretized configurations and partial partitions  

E-Print Network [OSTI]

We show that the discretized configuration space of $k$ points in the $n$-simplex is homotopy equivalent to a wedge of spheres of dimension $n-k+1$. This space is homeomorphic to the order complex of the poset of ordered partial partitions of $\\{1,\\...,n+1\\}$ with exactly $k$ parts. We also compute the Euler characteristic in two different ways, thereby obtaining a topological proof of a combinatorial recurrence satisfied by the Stirling numbers of the second kind.

Abrams, Aaron; Hower, Valerie

2010-01-01T23:59:59.000Z

44

LOCFES-NL: a tool for testing nonlinear spatial approximations to neutron transport in plane-parallel geometry  

E-Print Network [OSTI]

of the requirements for the degree of MASTER OF SCIENCE December 1997 Major Subject:Nuclear Engineering LOCFES-NL: A TOOL FOR TESTING NONLINEAR SPATIAL APPROXIMATIONS TO NEUTRON TRANSPORT IN PLANE-PARALLEL GEOMETRY A Thesis by STEVEN DOUGLAS NOLEN Submitted...) John . Poston, Sr. (Head of Department) December 1997 Major Subject: Nuclear Engineering ABSTRACT LOCFES-NL: A Tool for Testing Nonlinear Spatial Approximations to Neutron Transport in Plane-Parallel Geometry. (December 1997) Steven Douglas Nolen...

Nolen, Steven Douglas

1997-01-01T23:59:59.000Z

45

Multipole Analysis of Circular Cylindircal Magnetic Systems  

SciTech Connect (OSTI)

This thesis deals with an alternate method for computing the external magnetic field from a circular cylindrical magnetic source. The primary objective is to characterize the magnetic source in terms of its equivalent multipole distribution. This multipole distribution must be valid at points close to the cylindrical source and a spherical multipole expansion is ill-equipped to handle this problem; therefore a new method must be introduced. This method, based upon the free-space Green's function in cylindrical coordinates, is developed as an alternative to the more familiar spherical harmonic expansion. A family of special functions, called the toroidal functions or Q-functions, are found to exhibit the necessary properties for analyzing circular cylindrical geometries. In particular, the toroidal function of zeroth order, which comes from the integral formulation of the free-space Green's function in cylindrical coordinates, is employed to handle magnetic sources which exhibit circular cylindrical symmetry. The toroidal functions, also called Q-functions, are the weighting coefficients in a ''Fourier series-like'' expansion which represents the free-space Green's function. It is also called a toroidal expansion. This expansion can be directly employed in electrostatic, magnetostatic, and electrodynamic problems which exhibit cylindrical symmetry. Also, it is shown that they can be used as an alternative to the Elliptic integral formulation. In fact, anywhere that an Elliptic integral appears, one can replace it with its corresponding Q-function representation. A number of problems, using the toroidal expansion formulation, are analyzed and compared to existing known methods in order to validate the results. Also, the equivalent multipole distribution is found for most of the solved problems along with its corresponding physical interpretation. The main application is to characterize the external magnetic field due to a six-pole permanent magnet motor in terms of its equivalent multipole distribution.

J Selvaggi

2006-01-09T23:59:59.000Z

46

Circular zig-zag scan video format  

DOE Patents [OSTI]

A circular, ziz-zag scan for use with vidicon tubes is disclosed. A sine wave is generated, rectified and its fourth root extracted. The fourth root, and its inverse, are used to generate horizontal ramp and sync signals. The fourth root is also used to generate a vertical sync signal, and the vertical sync signal, along with the horizontal sync signal, are used to generate the vertical ramp signal. Cathode blanking and preamplifier clamp signals are also obtained from the vertical sync signal. 10 figs.

Peterson, C.G.; Simmons, C.M.

1992-06-09T23:59:59.000Z

47

Federal Acquisition Circular 48 | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAX POLICIES ANDIndustrial HygieneEnergyLead-acidPrimusContinued onCircular 48

48

Federal Acquisition Circular WAC) 2001-24  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAX POLICIES ANDIndustrial HygieneEnergyLead-acidPrimusContinued onCircular 48

49

Federal Acquisition Circulars 17, 18 and 20  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAX POLICIES ANDIndustrial HygieneEnergyLead-acidPrimusContinued onCircular 48

50

A Family of Circular Bargmann Transforms  

E-Print Network [OSTI]

When considering a charged particle evolving in the Poincar\\'e disk under influence of a uniform magnetic field with a strength proportional to +1, we construct for all hyperbolic Landau level \\epsilon^\\gamma_$m$ m = 4m(-m), m 2 Z+ \\[0, /2] a family of coherent states transforms labeled by (,m) and mapping isometrically square integrable functions on the unit circle with respect to the measure sin^\\gamma-2m (\\theta/2) d\\theta onto spaces of bound states of the particle. These transforms are called circular Bargmann transforms.

Zouhair Mouayn

2011-05-24T23:59:59.000Z

51

Dimensional regularization in configuration space  

SciTech Connect (OSTI)

Dimensional regularization is introduced in configuration space by Fourier transforming in {nu} dimensions the perturbative momentum space Green functions. For this transformation, the Bochner theorem is used; no extra parameters, such as those of Feynman or Bogoliubov and Shirkov, are needed for convolutions. The regularized causal functions in {ital x} space have {nu}-dependent moderated singularities at the origin. They can be multiplied together and Fourier transformed (Bochner) without divergence problems. The usual ultraviolet divergences appear as poles of the resultant analytic functions of {nu}. Several examples are discussed. {copyright} {ital 1996 The American Physical Society.}

Bollini, C.G. [Facultad de Ciencias Exactas de La Universidad de La Plata, Departamento de Fisica, C.C. 67 La Plata (Argentina)] [Facultad de Ciencias Exactas de La Universidad de La Plata, Departamento de Fisica, C.C. 67 La Plata (Argentina); [Comision de Investigaciones Cientificas de La Provincia de Buenos Aires, Buenos Aires (Argentina); Giambiagi, J.J. [Centro Brasileiro de Pesquisas Fisicas--CBPF, Rua Dr. Xavier Sigaud, 150, 22.290-180 Rio de Janeiro RJ, (Brasil)] [Centro Brasileiro de Pesquisas Fisicas--CBPF, Rua Dr. Xavier Sigaud, 150, 22.290-180 Rio de Janeiro RJ, (Brasil)

1996-05-01T23:59:59.000Z

52

FED pumped limiter configuration issues  

SciTech Connect (OSTI)

Impurity control in the Fusion Engineering Device (FED) is provided by a toroidal belt pumped limiter. Limiter design issues addressed in this paper are (1) poloidal location of the limiter belt, (2) shape of the limiter surface facing the plasma, and (3) whether the belt is pumped from one or both sides. The criteria used for evaluation of limiter configuration features were sensitivity to plasma-edge conditions and ease of maintenance and fabrication. The evaluation resulted in the selection of a baseline FED limiter that is located at the bottom of the device and has a flat surface with a single leading edge.

Haines, J.R.; Fuller, G.M.

1983-01-01T23:59:59.000Z

53

Multiple forearm robotic elbow configuration  

DOE Patents [OSTI]

A dual forearmed robotic elbow configuration comprises a main arm having a double elbow from which two coplanar forearms depend, two actuators carried in the double elbow for moving the forearms, and separate, independent end effectors, operated by a cable carried from the main arm through the elbow, is attached to the distal end of each forearm. Coiling the cables around the actuators prevents bending or kinking when the forearms are rotated 360 degrees. The end effectors can have similar or different capabilities. Actuator cannisters within the dual elbow are modular for rapid replacement or maintenance. Coarse and fine resolver transducers within the actuators provide accurate position referencing information.

Fisher, John J. (Wilmington, DE)

1990-01-01T23:59:59.000Z

54

Euclid Hardware and Software Configuration  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4:Epitaxial Thin Film XRD Epitaxial ThinHeatersEmailConfiguration

55

Uniaxial in-plane magnetization of iron nanolayers grown within an amorphous matrix  

SciTech Connect (OSTI)

Conversion electron Mössbauer spectroscopy is used to determine the magnetic ground state at zero magnetic field of four-monolayer thick amorphous iron layers as part of a CoFeB-Fe multilayer stack. By comparing the intensities of the magnetic hyperfine field, an easy in-plane axis of the amorphous embedded Fe layer is verified, which is collinear to the uniaxial anisotropy axis of the neighboring amorphous CoFeB. Despite the soft magnetic character of the Fe layers, external fields up to 4?T perpendicular to the film plane are insufficient to completely align the embedded Fe moments parallel to the magnetic field due to a local disorder of the magnetic moments of the Fe atoms.

Ghafari, M., E-mail: mohammad.ghafari@kit.edu; Hahn, H. [Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094 (China); Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany); Mattheis, R. [Leibniz Institute for Photonic Technology IPHT, Jena (Germany); McCord, J. [Institute for Materials Science, Kiel University Kiel, Kaiserstraße 2, 24143 Kiel (Germany); Brand, R. A. [Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany); Macedo, W. A. A. [Laboratório de Física Aplicada, Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), 31270-901 Belo Horizonte, MG (Brazil)

2014-08-18T23:59:59.000Z

56

Using Circular Programs to Deforest in Accumulating Parameters  

E-Print Network [OSTI]

Using Circular Programs to Deforest in Accumulating Parameters Janis Voigtl¨ander (voigt) deforestation, tree transducers CCS categories and subject descriptors: D.1.1 [Programming Techniques

Eckmiller, Rolf

57

DEVELOPMENT OF OPTIMUM DESIGN CONFIGURATION AND  

E-Print Network [OSTI]

DEVELOPMENT OF OPTIMUM DESIGN CONFIGURATION AND PERFORMANCE FOR VERTICAL AXIS WIND TURBINE Prepared DESIGN CONFIGURATION AND PERFORMANCE FOR VERTICAL AXIS WIND TURBINE EISG AWARDEE Mechanical and Aerospace://www.energy.ca.gov/research/index.html. #12;Page 1 Development Of Optimum Design Configuration And Performance For Vertical Axis Wind Turbine

58

VLA HYBRID CONFIGURATIONS A Critical Look  

E-Print Network [OSTI]

VLA HYBRID CONFIGURATIONS A Critical Look Barry Clark EVLA Memo 180 July 2014 The VLA hybrid weeks (plus the two week hybrid), whereas going directly from one main configuration to another could 4.5%. 2. The time requests in the hybrid configuration are heavily weighted to the galactic center

Groppi, Christopher

59

Simplified expansions for radiation from a baffled circular piston  

E-Print Network [OSTI]

Simplified expansions for radiation from a baffled circular piston T. Douglas Mast Department from a baffled circular piston continues be an active area of investigation, both as a canonical computations of piston fields in lossless and attenuative fluid media. For the region r a, where

Mast, T. Douglas

60

Circularization of Tidally Disrupted Stars around Spinning Supermassive Black Holes  

E-Print Network [OSTI]

We study the circularization of tidally disrupted stars on bound orbits around spinning supermassive black holes by performing three-dimensional smoothed particle hydrodynamic simulations with Post-Newtonian corrections. Our simulations reveal that debris circularization depends sensitively on the efficiency of radiative cooling. There are two stages in debris circularization if radiative cooling is inefficient: first, the stellar debris streams self-intersect due to relativistic apsidal precession; shocks at the intersection points thermalize orbital energy and the debris forms a geometrically thick, ring-like structure around the black hole. The ring rapidly spreads via viscous diffusion, leading to the formation of a geometrically thick accretion disk. In contrast, if radiative cooling is efficient, the stellar debris circularizes due to self-intersection shocks and forms a geometrically thin ring-like structure. In this case, the dissipated energy can be emitted during debris circularization as a precurso...

Hayasaki, Kimitake; Loeb, Abraham

2015-01-01T23:59:59.000Z

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61

Metrics for measuring distances in configuration spaces  

SciTech Connect (OSTI)

In order to characterize molecular structures we introduce configurational fingerprint vectors which are counterparts of quantities used experimentally to identify structures. The Euclidean distance between the configurational fingerprint vectors satisfies the properties of a metric and can therefore safely be used to measure dissimilarities between configurations in the high dimensional configuration space. In particular we show that these metrics are a perfect and computationally cheap replacement for the root-mean-square distance (RMSD) when one has to decide whether two noise contaminated configurations are identical or not. We introduce a Monte Carlo approach to obtain the global minimum of the RMSD between configurations, which is obtained from a global minimization over all translations, rotations, and permutations of atomic indices.

Sadeghi, Ali, E-mail: ali.sadeghi@unibas.ch; Ghasemi, S. Alireza; Schaefer, Bastian; Mohr, Stephan; Goedecker, Stefan [Department of Physics, Universität Basel, Klingelbergstr. 82, 4056 Basel (Switzerland)] [Department of Physics, Universität Basel, Klingelbergstr. 82, 4056 Basel (Switzerland); Lill, Markus A. [Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907 (United States)] [Department of Medicinal Chemistry and Molecular Pharmacology, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907 (United States)

2013-11-14T23:59:59.000Z

62

Magneto-electric coupling in a two-dimensional ballistic Josephson junction with in-plane magnetic texture  

E-Print Network [OSTI]

Magneto-electric coupling in a two-dimensional ballistic Josephson junction with in-plane magnetic, Germany (Dated: August 20, 2014) We study a Josephson junction made with a spin-textured bridge, when both-dimensional ballistic Josephson junction close to the critical temperature of the heterostructure, when an anomalous

Boyer, Edmond

63

Rayleigh Test for Randomness of Circular Data  

E-Print Network [OSTI]

Critical values of the,Rayleigh test for testing whether the population of circular data from which a sample is drawn differs from randomness are sometimes presented in an inconvenient form (Batschelet, 1981) which makes it necessary to interpolate to obtain a value at a chosen probability level. Even when the values are presented at fixed probability levels (Mardia, 1972) it can be useful for computer programming and other purposes to have a simple expression that describes the tables. According to Mardia (1972) a good approximation, based on the work of Pearson (1906) and Greenwood and Durand (1955) for P = P (n R '>K), where is the mean resultant vector of n unit vectors, is given by A study of the tabulated critical values of R reveals that K is quite well represented by a linear function of over a wide range of n for each probability level P (Fig. 1). Substituting K =A t B/n in (1) yields so we choose A =-1nP and B = (2A- A2)/4. ~husapproximate critical values ofnR2 are given by

D. Wilkie

1983-01-01T23:59:59.000Z

64

Challenges for highest energy circular colliders  

E-Print Network [OSTI]

A new tunnel of 80–100 km circumference could host a 100 TeV centre-of-mass energy-frontier proton collider (FCC-hh/VHE-LHC), with a circular lepton collider (FCCee/TLEP) as potential intermediate step, and a leptonhadron collider (FCC-he) as additional option. FCC-ee, operating at four different energies for precision physics of the Z, W, and Higgs boson and the top quark, represents a significant push in terms of technology and design parameters. Pertinent R&D efforts include the RF system, topup injection scheme, optics design for arcs and final focus, effects of beamstrahlung, beam polarization, energy calibration, and power consumption. FCC-hh faces other challenges, such as high-field magnet design, machine protection and effective handling of large synchrotron radiation power in a superconducting machine. All these issues are being addressed by a global FCC collaboration. A parallel design study in China prepares for a similar, but smaller collider, called CepC/SppC.

Benedikt, M; Wenninger, J; Zimmermann, F

2014-01-01T23:59:59.000Z

65

A spintronic source of circularly polarized single photons  

E-Print Network [OSTI]

We present a spintronic single photon source which emits circularly polarized light, where the helicity is determined by an applied magnetic field. Photons are emitted from an InGaAs quantum dot inside an electrically operated spin light-emitting diode, which comprises the diluted magnetic semiconductor ZnMnSe. The circular polarization degree of the emitted light is high, reaching 83% at an applied magnetic field of 2T and 96% at 6 T. Autocorrelation traces recorded in pulsed operation mode prove the emitted light to be antibunched. The two circular polarization states could be used for representing quantum states |0> and |1> in quantum cryptography implementations.

Asshoff, Pablo; Kalt, Heinz; Hetterich, Michael

2011-01-01T23:59:59.000Z

66

The heterogeneous gas with singular interaction: Generalized circular law and heterogeneous renormalized energy  

E-Print Network [OSTI]

We introduce and analyze $d$ dimensional Coulomb gases with random charge distribution and general external confining potential. We show that these gases satisfy a large deviations principle. The analysis of the minima of the rate function (which is the leading term of the energy) reveals that at equilibrium, the particle distribution is a generalized circular law (i.e. with spherical support but non-necessarily uniform distribution). In the classical electrostatic external potential, there are infinitely many minimizers of the rate function. The most likely macroscopic configuration is a disordered distribution in which particles are uniformly distributed (for $d=2$, the circular law), and charges are independent of the positions of the particles. General charge-dependent confining potentials unfold this degenerate situation: in contrast, the particle density is not uniform, and particles spontaneously organize according to their charge. In that picture the classical electrostatic potential appears as a transition at which order is lost. Sub-leading terms of the energy are derived: we show that these are related to an operator, generalizing the Coulomb renormalized energy, which incorporates the heterogeneous nature of the charges. This heterogeneous renormalized energy informs us about the microscopic arrangements of the particles, which are non-standard, strongly depending on the charges, and include progressive and irregular lattices.

Luis Carlos Garcia del Molino; Khashayar Pakdaman; Jonathan Touboul

2014-10-26T23:59:59.000Z

67

Configurations for short period rf undulators  

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

Several configurations for rf undulators energized at millimeter wavelengths and designed to produce coherent nanometer radiation from sub-GeV electron beams are analyzed and compared with one another. These configurations include a traveling-wave resonant ring, a standing wave resonator, and a resonator operating close to cutoff.

Kuzikov, S. V.; Jiang, Y.; Marshall, T. C.; Sotnikov, G. V.; Hirshfield, J. L.

2013-07-01T23:59:59.000Z

68

V-036: EMC Smarts Network Configuration Manager Database Authenticatio...  

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

36: EMC Smarts Network Configuration Manager Database Authentication Bypass Vulnerability V-036: EMC Smarts Network Configuration Manager Database Authentication Bypass...

69

Evolution of the Configuration Database Design  

SciTech Connect (OSTI)

The BABAR experiment at SLAC successfully collects physics data since 1999. One of the major parts of its on-line system is the configuration database which provides other parts of the system with the configuration data necessary for data taking. Originally the configuration database was implemented in the Objectivity/DB ODBMS. Recently BABAR performed a successful migration of its event store from Objectivity/DB to ROOT and this prompted a complete phase-out of the Objectivity/DB in all other BABAR databases. It required the complete redesign of the configuration database to hide any implementation details and to support multiple storage technologies. In this paper we describe the process of the migration of the configuration database, its new design, implementation strategy and details.

Salnikov, A

2006-04-19T23:59:59.000Z

70

SIMULTANEOUS MEASUREMENT OF CIRCULAR DICHROISM AND FLUORESCENCE POLARIZATION ANISOTROPY.  

SciTech Connect (OSTI)

Circular dichroism and fluorescence polarization anisotropy are important tools for characterizing biomolecular systems. Both are used extensively in kinetic experiments involving stopped- or continuous flow systems as well as titrations and steady-state spectroscopy. This paper presents the theory for determining circular dichroism and fluorescence polarization anisotropy simultaneously, thus insuring the two parameters are recorded under exactly the same conditions and at exactly the same time in kinetic experiments. The approach to measuring circular dichroism is that used in almost all conventional dichrographs. Two arrangements for measuring fluorescence polarization anisotropy are described. One uses a single fluorescence detector and signal processing with a lock-in amplifier that is similar to the measurement of circular dichroism. The second approach uses classic ''T'' format detection optics, and thus can be used with conventional photon-counting detection electronics. Simple extensions permit the simultaneous measurement of the absorption and excitation intensity corrected fluorescence intensity.

SUTHERLAND,J.C.

2002-01-19T23:59:59.000Z

71

Binary Black Holes in Quasi-Stationary Circular Orbits  

E-Print Network [OSTI]

We propose a method of determining solutions to the constraint equations of General Relativity approximately describing binary black holes in quasi-stationary circular orbits. Black holes with arbitrary linear momenta are constructed in the manner suggested by Brandt and Brugmann. The quasi-stationary circular orbits are determined by local minima in the ADM mass in a manner similar to Baumgarte and Cook; however, rather than fixing the area of the apparent horizon, we fix the value of the bare masses of the holes. We numerically generate an evolutionary sequence of quasi-stationary circular orbits up to and including the innermost stable circular orbit. We compare our results with post-Newtonian expectations as well as the results of Cook and Baumgarte. We also generate additional numerical results describing the dynamics of the geometry due to the emission of gravitational radiation.

Brian D. Baker

2002-05-18T23:59:59.000Z

72

Analysis of transverse apertures in a circular waveguide  

E-Print Network [OSTI]

of a transverse aperture will be extremely useful in the design of coupled cavity resonators and circular cavity backed resonant aperture antennas. B. l. iterature Review Many authors have investigated the effects of apertures in both the transverse... 1989 Major Subject: Electrical Engineering ANALYSIS OF TRANSVERSE APERTURES IN A CIRCULAR WAVEGUIDE A Thesis GARY BRYAN EASTHAM Approved as to style and content by: Kai Chang (Chair of Committee) Brian D. Young (Member) Donal L. Parker...

Eastham, Gary Bryan

1989-01-01T23:59:59.000Z

73

Toroidal configurations of perfect fluid in the Reissner-Nordström-(anti-)de Sitter spacetimes  

SciTech Connect (OSTI)

Influence of cosmological constant on toroidal fluid configurations around charged spherically symmetric black holes and naked singularities is demostrated by study of perfect-fluid tori with uniform distribution of specific angular momentum orbiting in the Reissner-Nordström-(anti-)de Sitter spacetimes. Toroidal configurations are allowed only in the spacetimes admitting existence of stable circular geodesics. Configurations with marginally closed equipotential (equipressure) surfaces crossing itself in a cusp allow accretion (through the inner cusp) and/or excretion (through the outer cusp) of matter from the toroidal configuration. Detailed classification of the Reissner-Nordström-(anti-)de Sitter spacetimes according to properties of the marginally stable tori is given. It is demonstrated that in the Reissner-Nordström-de Sitter naked-singularity spacetimes an interesting phenomenon of doubled tori can exist enabling exchange of matter between two tori in both inward and outward directions. In naked-singularity spacetimes the accretion onto the central singularity is impossible due to existence of a potential barrier.

Kucáková, Hana; Slaný, Petr; Stuchlík, Zden?k, E-mail: hana.kucakova@centrum.cz, E-mail: petr.slany@fpf.slu.cz, E-mail: zdenek.stuchlik@fpf.slu.cz [Institute of Physics, Faculty of Philosophy and Science, Silesian university in Opava, Bezrucovo nám. 13, Opava, CZ-746 01 (Czech Republic)

2011-01-01T23:59:59.000Z

74

In-Plane Electronic Anisotropy of Underdoped ___122___ Fe-Arsenide Superconductors Revealed by Measurements of Detwinned Single Crystals  

SciTech Connect (OSTI)

The parent phases of the Fe-arsenide superconductors harbor an antiferromagnetic ground state. Significantly, the Neel transition is either preceded or accompanied by a structural transition that breaks the four fold symmetry of the high-temperature lattice. Borrowing language from the field of soft condensed matter physics, this broken discrete rotational symmetry is widely referred to as an Ising nematic phase transition. Understanding the origin of this effect is a key component of a complete theoretical description of the occurrence of superconductivity in this family of compounds, motivating both theoretical and experimental investigation of the nematic transition and the associated in-plane anisotropy. Here we review recent experimental progress in determining the intrinsic in-plane electronic anisotropy as revealed by resistivity, reflectivity and ARPES measurements of detwinned single crystals of underdoped Fe arsenide superconductors in the '122' family of compounds.

Fisher, Ian Randal

2012-05-08T23:59:59.000Z

75

A configuration system for Siemens Airlink  

E-Print Network [OSTI]

A configuration system for Siemens Airlink Søren Løvborg Abstract Siemens Airlink is a railway for context-free grammars . . . . . . . . 41 4.7 Parse tree transforms

76

Cognitive abilities as influenced by family configuration  

E-Print Network [OSTI]

COGNITIVE ABILITIES AS INFLUENCED BY FAMILY CONFIGURATION A Thesis by Jani ce Leanne Pate Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1979... Major Subject; Psychology COGNITIVE ABILITIES AS INFLUENCED BY FAMILY CONFIGURATION A Thesis by Jani ce Leanne Pate Approved as to style and content by: Chairman of Committee ( y' ~ ' l~ ~ J Hember / Nember (Head of Department) August 1979...

Pate, Janice Leanne

2012-06-07T23:59:59.000Z

77

Optimal energy-harvesting cycles for load-driven dielectric generators in plane strain  

E-Print Network [OSTI]

The performances of energy harvesting generators based on dielectric elastomers are investigated. The configuration is of a thin dielectric film coated by stretchable electrodes at both sides. The film is first stretched, then charged and subsequently, afterwards it is released, and finally the charge is harvested at a higher electric potential. The amount of energy extracted by this cycle is bounded by the electric breakdown and the ultimate stretch ratio of the film as well as by structural instabilities due to loss of tension. To identify the optimal cycle that complies with these limits we formulate a constraint optimization problem and solve it with a dedicated solver for two typical classes of elastic dielectrics. As anticipated, we find that the performance of the generator depends critically on the ultimate stretch ratio of the film. However, more surprising is our finding of a universal limit on the dielectric strength of the film beyond which the optimal cycle is independent of this parameter. Thus, we reveal that, regardless of how large the dielectric strength of the material is, there is an upper bound on the amount of harvested energy that depends only on the ultimate stretch ratio. We conclude the work with detailed calculations of the optimal cycles for two commercially available elastic dielectrics.

R. Springhetti; E. Bortot; G. deBotton; M. Gei

2014-03-13T23:59:59.000Z

78

Nonlinear transverse cascade and two-dimensional magnetohydrodynamic subcritical turbulence in plane shear flows  

E-Print Network [OSTI]

We find and investigate via numerical simulations self-sustained two-dimensional turbulence in a magnetohydrodynamic flow with a maximally simple configuration: plane, noninflectional (with a constant shear of velocity) and threaded by a parallel uniform background magnetic field. This flow is spectrally stable, so the turbulence is subcritical by nature and hence it can be energetically supported just by transient growth mechanism due to shear flow nonnormality. This mechanism appears to be essentially anisotropic in spectral (wavenumber) plane and operates mainly for spatial Fourier harmonics with streamwise wavenumbers less than a ratio of flow shear to the Alfv\\'{e}n speed, $k_y < S/u_A$ (i.e., the Alfv\\'{e}n frequency is lower than the shear rate). We focused on the analysis of the character of nonlinear processes and underlying self-sustaining scheme of the turbulence, i.e., on the interplay between linear transient growth and nonlinear processes, in spectral plane. Our study, being concerned with a ...

Mamatsashvili, G R; Chagelishvili, G D; Horton, W

2014-01-01T23:59:59.000Z

79

Transition from in-plane to out-of-plane azimuthal enhancement inAu+Au collisions  

SciTech Connect (OSTI)

The incident energy at which the azimuthal distributions in semi-central heavy ion collisions change from in-plane to out-of-plane enhancement--E{sub tran} is studied as a function of mass of emitted particles, their transverse momentum and centrality for Au+Au collisions. The analysis is performed in a reference frame rotated with the sidewards flow angle ({Theta}{sub flow}) relative to the beam axis. A systematic decrease of E{sub tran} as function of mass of the reaction products, their transverse momentum and collision centrality is evidenced. The predictions of a microscopic transport model (IQMD) are compared with the experimental results.

Andronic, A.; Stoicea, G.; Petrovici, M.; Simion, V.; Crochet,P.; Alard, J.P.; Averbeck, R.; Barret, V.; Basrak, Z.; Bastid, N.; Bendarag, A.; Berek, G.; Caplar, R.; Devismes, A.; Dupieux, Dzelalija M.; Eskef, M.; Finck, Ch.; Fodor, Z.; Gobbi, A.; Grishkin, Y.; Hartmann,O.N.; Herrmann, N.; Hildenbrand, K.D.; Hong, B.; Kecskemeti, J.; Kim,Y.J.; Kirejczyk, M.; Korolija, M.; Kotte, R.; Kress, T.; Kutsche, R.; Lebedev, A.; Lee, K.S.; Leifels, Y.; Manko, V.; Merlitz, H.; Neubert, W.; Pelte, D.; Plettner, C.; Rami, F.; Resdorf, W.; de Schauenberg, B.; Schull, D.; Seres, Z.; Sikora, B.; Sim, K.S.; Siwek-Wilczynska, K.; Smolyankin, V.; Stockmeier, M.R.; Vasiliev, M.; Wagner, P.; Wisniewski,K.; Wohlfarth, D.; Yushmanov, I.; Zhilin, A.

2000-08-09T23:59:59.000Z

80

Critical configurations of planar robot arms  

E-Print Network [OSTI]

It is known that a closed polygon P is a critical point of the oriented area function if and only if P is a cyclic polygon, that is, $P$ can be inscribed in a circle. Moreover, there is a short formula for the Morse index. Going further in this direction, we extend these results to the case of open polygonal chains, or robot arms. We introduce the notion of the oriented area for an open polygonal chain, prove that critical points are exactly the cyclic configurations with antipodal endpoints and derive a formula for the Morse index of a critical configuration.

Khimshiashvili, G; Siersma, D; Zhukova, A

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Configuration Interactions Constrained by Energy Density Functionals  

E-Print Network [OSTI]

A new method for constructing a Hamiltonian for configuration interaction calculations with constraints to energies of spherical configurations obtained with energy-density-functional (EDF) methods is presented. This results in a unified model that reproduced the EDF binding-energy in the limit of single-Slater determinants, but can also be used for obtaining energy spectra and correlation energies with renormalized nucleon-nucleon interactions. The three-body and/or density-dependent terms that are necessary for good nuclear saturation properties are contained in the EDF. Applications to binding energies and spectra of nuclei in the region above 208Pb are given.

B. Alex Brown; Angelo Signoracci; Morten Hjorth-Jensen

2010-09-24T23:59:59.000Z

82

V-120: EMC Smarts Network Configuration Manager Java RMI Access...  

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

0: EMC Smarts Network Configuration Manager Java RMI Access Control Flaw Lets Remote Users Gain Full Control V-120: EMC Smarts Network Configuration Manager Java RMI Access Control...

83

V-235: Cisco Mobility Services Engine Configuration Error Lets...  

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

5: Cisco Mobility Services Engine Configuration Error Lets Remote Users Login Anonymously V-235: Cisco Mobility Services Engine Configuration Error Lets Remote Users Login...

84

On the Asymptotic Behaviour of Circular Fuzzy Cellular Automata  

E-Print Network [OSTI]

fuzzification) . Fuzzy cellular automata were first introduced in [5] as a model to describe the impact CA (e.g., see [11]). They have been shown to be useful tools for pattern recognition purposes (eOn the Asymptotic Behaviour of Circular Fuzzy Cellular Automata HEATHER BETEL AND PAOLA FLOCCHINI

Flocchini, Paola

85

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

86

Using Circular Programs to Deforest in Accumulating Parameters  

E-Print Network [OSTI]

Using Circular Programs to Deforest in Accumulating Parameters Janis Voigtl Ë? ander # Department classical deforestation techniques fail. In order to avoid multiple traversals of the input data structure, deforestation, intermediate data structures, lazy composition, lazy evalu­ ation, multiple traversals, program

Eckmiller, Rolf

87

Modeling of NOx formation in circular laminar jet flames  

E-Print Network [OSTI]

-premixed isolated circular laminar jet flame. The jet consists of the fuel rich inner region and the O2 rich outer region. The model estimates both thermal NOx and prompt NOx assuming single step kinetics for NOx formation and a thin flame model. Further the amount...

Siwatch, Vivek

2007-04-25T23:59:59.000Z

88

Drought Strategies for Alfalfa Cooperative Extension Service Circular 581  

E-Print Network [OSTI]

Drought Strategies for Alfalfa Cooperative Extension Service · Circular 581 College of Agriculture and Home Economics #12;1 Drought Strategies for Alfalfa With continued dry conditions throughout New Mexico, farmers with alfalfa fields should consider sev- eral production strategies in order to preserve alfalfa

Mukhtar, Saqib

89

"Circularization" vs. Accretion -- What Powers Tidal Disruption Events?  

E-Print Network [OSTI]

A tidal disruption event (TDE) takes place when a star passes near enough to a massive black hole to be disrupted. About half the star's matter is given elliptical trajectories with large apocenter distances, the other half is unbound. To "circularize", i.e., to form an accretion flow, the bound matter must lose a significant amount of energy, with the actual amount depending on the characteristic scale of the flow measured in units of the black hole's gravitational radius (~ 10^{51} (R/1000R_g)^{-1} erg). Recent numerical simulations (Shiokawa et al., 2015) have revealed that the circularization scale is close to the scale of the most-bound initial orbits, ~ 10^3 M_{BH,6.5}^{-2/3} R_g ~ 10^{15} M_{BH,6.5}^{1/3} cm from the black hole, and the corresponding circularization energy dissipation rate is $\\sim 10^{44} M_{BH,6.5}^{-1/6}$~erg/s. We suggest that the energy liberated during circularization, rather then energy liberated by accretion onto the black hole, powers the observed optical TDE candidates (e.g.A...

Piran, Tsvi; Krolik, Julian; Cheng, Roseanne M; Shiokawa, Hotaka

2015-01-01T23:59:59.000Z

90

Spatial modulation of in-plane magnetic anisotropy in epitaxial Co(111) films grown on macrostep-bunched Si(111)  

SciTech Connect (OSTI)

We compared magnetic properties of epitaxial Co(111) films grown on microstep- and macrostep-bunched vicinal Si(111) substrates. A surface of the microstep-bunched Si(111) substrate represents regular array of step-bunches with height of 1.7?nm divided from each other by flat microterraces with a width of 34?nm. A surface of the macrostep-bunched Si(111) substrate is constituted by macrostep bunches with a height of 75–85?nm divided by atomically flat macroterraces. The average sum width of a macrostep bunch and a macroterrace is 2.3??m. While in-plane magnetic anisotropy was spatially uniform in Co(111) films grown on the microstep-bunched Si(111), periodic macromodulation of the topography of the Si(111) substrate induced spatial modulation of in-plane magnetic anisotropy in Co(111) film grown on the macrostep-bunched Si(111) surface. The energy of uniaxial magnetic anisotropy in the areas of the Co(111) film deposited on the Si(111) macrosteps was higher more than by the order of magnitude than the energy of the magnetic anisotropy in the areas grown on macroterraces. Magnetization reversal in the areas with different energy of the magnetic anisotropy occurred in different magnetic fields. We showed the possibility of obtaining high density of domain walls in Co(111) film grown on the macrostep-bunched Si(111) by tuning the spatial step density of the Si(111) substrate.

Davydenko, A. V., E-mail: avdavydenko@gmail.com; Kozlov, A. G.; Chebotkevich, L. A. [Laboratory of Thin Film Technologies, Far Eastern Federal University, Vladivostok 690950 (Russian Federation)

2014-10-14T23:59:59.000Z

91

Computational Analysis of Shrouded Wind Turbine Configurations  

E-Print Network [OSTI]

Computational Analysis of Shrouded Wind Turbine Configurations Aniket C. Aranake Vinod K. Lakshminarayan Karthik Duraisamy Computational analysis of diuser-augmented turbines is performed using high-dimensional simulations of shrouded wind turbines are performed for selected shroud geometries. The results are compared

Alonso, Juan J.

92

Blind source separation of convolutive mixtures of non circular linearly modulated signals with unknown baud  

E-Print Network [OSTI]

Blind source separation of convolutive mixtures of non circular linearly modulated signals addresses the problem of blind separation of convolutive mix- tures of BPSK and circular linearly modulated theoretical statements. Keywords: Blind source separation, Convolutive mixture, Constant Modulus Algorithm

Paris-Sud XI, Université de

93

The Database Driven ATLAS Trigger Configuration System  

E-Print Network [OSTI]

This contribution describes the trigger selection configuration system of the ATLAS low- and high-level trigger (HLT) and the upgrades it received in preparation for LHC Run 2. The ATLAS trigger configuration system is responsible for applying the physics selection parameters for the online data taking at both trigger levels and the proper connection of the trigger lines across those levels. Here the low-level trigger consists of the already existing central trigger (CT) and the new Level-1 Topological trigger (L1Topo), which has been added for Run 2. In detail the tasks of the configuration system during the online data taking are Application of the selection criteria, e.g. energy cuts, minimum multiplicities, trigger object correlation, at the three trigger components L1Topo, CT, and HLT On-the-fly, e.g. rate-dependent, generation and application of prescale factors to the CT and HLT to adjust the trigger rates to the data taking conditions, such as falling luminosity or rate spikes in the detector readout ...

Martyniuk, Alex; The ATLAS collaboration

2015-01-01T23:59:59.000Z

94

Strain effects on in-plane conductance of the topological insulator Bi{sub 2}Te{sub 3}  

SciTech Connect (OSTI)

We investigated the correlation between electrical transport and mechanical stress in a topological insulator, Bi{sub 2}Te{sub 3}, using conductive probe atomic force microscopy in an ultrahigh vacuum environment. After directly measuring charge transport on the cleaved Bi{sub 2}Te{sub 3} surface, we found that the current density varied with applied load. Current mapping revealed a variation of the current on different terraces. The current density increased in the low-pressure regime and then decreased in the high-pressure regime. This variation of current density was explained in light of the combined effect of changes in the in-plane conductance due to spin–orbit coupling and hexagonal warping.

Heui Hwang, Jin; Kwon, Sangku; Hun Kim, Jong; Young Park, Jeong, E-mail: jeongypark@kaist.ac.kr [Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 305-701 (Korea, Republic of); Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701 (Korea, Republic of); Park, Joonbum; Sung Kim, Jun [Department of Physics, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of); Lee, Jhinhwan [Department of Physics, KAIST, Daejeon 305-701 (Korea, Republic of); Lyeo, Ho-Ki [Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-gu, Daejeon 305-340 (Korea, Republic of)

2014-04-21T23:59:59.000Z

95

Circular polarization of obliquely propagating whistler wave magnetic field  

SciTech Connect (OSTI)

The circular polarization of the magnetic field of obliquely propagating whistler waves is derived using a basis set associated with the wave partial differential equation. The wave energy is mainly magnetic and the wave propagation consists of this magnetic energy sloshing back and forth between two orthogonal components of magnetic field in quadrature. The wave electric field energy is small compared to the magnetic field energy.

Bellan, P. M. [Applied Physics, Caltech, Pasadena California 91125 (United States)] [Applied Physics, Caltech, Pasadena California 91125 (United States)

2013-08-15T23:59:59.000Z

96

Circular hydraulic jump in generalized-Newtonian fluids  

E-Print Network [OSTI]

We carry out an analytical study of laminar circular hydraulic jumps, in generalized-Newtonian fluids obeying the two-parametric power-law model of Ostwald-de Waele. Under the boundary-layer approximation we obtained exact expressions determining the flow, an implicit relation for the jump radius is derived. Corresponding results for Newtonian fluids can be retrieved as a limiting case for the flow behavior index n=1, predictions are made for fluids deviating from Newtonian behavior.

Rai, Ashutosh; Poria, Swarup

2008-01-01T23:59:59.000Z

97

Friction (Chapter 5, section 8) & Circular Motion (Chapter 6,  

E-Print Network [OSTI]

1 Week 5 Friction (Chapter 5, section 8) & Circular Motion (Chapter 6, sections 1-2) Lecture Quiz 1 travels in time t is: A. x B. 1.5x C. 3x D. 4.5x E. 9x Forces of Friction When an object to the interactions between the object and its environment This resistance is called the force of friction Forces

98

Gravitational field of a stationary circular cosmic string loop  

E-Print Network [OSTI]

Gravitational field of a stationary circular cosmic string loop has been studied in the context of full nonlinear Einstein's theory of gravity. It has been assumed that the radial and tangential stresses of the loop are equal to the energy density of the string loop. An exact solution for the system has been presented which has a singularity at a finite distance from the axis,but is regular for any other distances from the axis of the loop.

A; A. Sen; N. Banerjee

1998-06-22T23:59:59.000Z

99

Circular modes for flat beams in the LHC  

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

Typically x/y optical coupling is considered as unwanted and thus suppressed; particular exclusions are electron and ionization coolers. Could some special coupled modes be effectively applied for the LHC complex? Perhaps, the answer is positive: use of the circular modes in the injectors with their transformation into planar modes in the LHC allows both the space charge and beam-beam luminosity limitations to be significantly reduced, if not practically eliminated.

Burov, A.

2013-06-01T23:59:59.000Z

100

Polarization of Astronomical Maser Radiation. IV. Circular Polarization Profiles  

E-Print Network [OSTI]

Profile comparison of the Stokes parameters $V$ and $I$ is a powerful tool for maser data analysis, providing the first direct methods for unambiguous determination of (1) the maser saturation stage, (2) the amplification optical depth and intrinsic Doppler width of unsaturated masers, and (3) the comparative magnitudes of Zeeman splitting and Doppler linewidth. Circular polarization recently detected in OH 1720 MHz emission from the Galactic center appears to provide the first direct evidence for maser saturation.

Moshe Elitzur

1998-04-03T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

PRIMER CONGRS NACIONAL 2 Circular (pre-programa)  

E-Print Network [OSTI]

PRIMER CONGR�S NACIONAL 2ª Circular (pre-programa) EL PAISATGE DELS RIURAUS: ARQUITECTURA, HER�NCIA dels riuraus: arquitectura, herència i reptes. Tot partint d'aquestes premisses el congrés pretén rebre a quatre grans àmbits: 1. ETNOGR�FIC-HIST�RIC 2. ARQUITECTURA I PAISATGE RURAL 3. TURÍSTIC I TERRITORIAL 4

Escolano, Francisco

102

Rigid-rotor, field-reversed configuration  

SciTech Connect (OSTI)

The radial profiles, n(r), B{sub z}(r), and E{sub r}(r), for a Flux-Coil (“inductively driven”), Field-Reversed Configuration (FC-FRC) are measured and compared to the predictions of the Rigid-Rotor Model (RRM), which is an analytic, one-dimensional, time-independent, equilibrium description for the FRC. Injectors mounted on both ends of the confinement vessel provide a pre-fill plasma. Coaxial coils mounted outside the vacuum boundaries of the annular-confinement vessel accelerate the plasma and produce the FRC. The density profile is measured by laser interferometry, the magnetic-field profile using an in-situ probe array, and the electric-field profile using an in-situ, floating-probe array. Free parameters for each profile are measured, which also allow other intrinsic-plasma parameters to be determined, using computer-fit algorithms: null radius, radial thickness, plasma temperature, rotation frequencies, the latter of which are independently verified by spectroscopy. All radial profiles agree with the RRM predictions, for the experimental configuration, parameter regime, and specified-time interval studied here.

Conti, F., E-mail: conti@df.unipi.it; Giammanco, F. [Physics Department “E. Fermi,” University of Pisa, Largo B. Pontecorvo 3, 56127 Pisa (Italy) [Physics Department “E. Fermi,” University of Pisa, Largo B. Pontecorvo 3, 56127 Pisa (Italy); Plasma Diagnostics and Technologies Ltd., Via Giuntini 63, 56023 Navacchio (PI) (Italy); Wessel, F. J.; Binderbauer, M. W.; Bolte, N.; Morehouse, M.; Qerushi, A.; Rahman, H. U.; Roche, T.; Slepchenkov, M. [Tri Alpha Energy, Inc., P.O. Box 7010, Rancho Santa Margarita, California 92688 (United States)] [Tri Alpha Energy, Inc., P.O. Box 7010, Rancho Santa Margarita, California 92688 (United States)

2014-02-15T23:59:59.000Z

103

Nuclear molecular configurations in heavy ion collisions  

SciTech Connect (OSTI)

The possibilities of nuclear molecular configurations in symmetric and asymmetric heavy ion collisions are investigated by choosing a proper parametrization for the molecule-like compound state. We treat the nucleus as a rotating liquid drop in terms of the elliptic lemniscatoid parametrization suggested by Royer and Remaud which describes all deformed shapes that occur during the process of fusion of two nuclei, starting from two touching spheres to a single one with the intermediate formation of a deep neck. Only one parameter ({ital s} for the symmetric and {ital s}{sub 1} for the conditional asymmetric case) is needed to define all the shapes encountered in the process. The shape has a neck as long as {ital s} or {ital s}{sub 1} is less than 1/ {radical}2 . In this parametrization, analytical expressions can be obtained for volume, surface, and moment of inertia while the Coulomb energy has to be evaluated numerically. The total energy of the system is calculated as a function of the parameter {ital s} or {ital s}{sub 1}, for various spins and if the stable shape corresponding to minimum energy is one with a neck, then it is concluded that the molecular configuration is possible. Our model yields results which are in good agreement with the experimental findings.

Shanmugam, G.; Padmini, M.D. (Department of Physics, Presidency College, Madras 600005, India (IN))

1989-09-01T23:59:59.000Z

104

A COMPUTATIONAL STUDY OF SUBSONIC FLOWFIELDS OVER A MISSILE CONFIGURATION  

E-Print Network [OSTI]

A COMPUTATIONAL STUDY OF SUBSONIC FLOWFIELDS OVER A MISSILE CONFIGURATION I.H.Tuncer \\Lambda , M a missile configuration are computed at high angles of attack ranging from 15 ffi to 60 ffi using the NASA in the higher incidence range. INTRODUCTION The flow over a full missile configuration with ca­ nards and tails

Tuncer, Ismail H.

105

Configurable Process Models: Experiences from a Municipality Case Study  

E-Print Network [OSTI]

Configurable Process Models: Experiences from a Municipality Case Study Florian Gottschalk1 , Teun.larosa@qut.edu.au Abstract. Configurable process models integrate different variants of a business process into a single model. Through configuration users of such models can then combine the variants to derive a process

van der Aalst, Wil

106

Vibration of circular plates, of several thicknesses, with three supports  

E-Print Network [OSTI]

~ ~ ~ ~ ~ ~ e ~ o ~ ~ i Prccedure and DeeoriPt'alen Of APPSXat'aua ~ ~ e ~ a ~ 0 ~ ~ i EmPirioal Ccrrelabicn Of Dataa ~ ~ ~ 1 ~ ~ ~ 01 ~ ~ ~ ~ ~ ~ ~ ~ i Kathemat, ical Theory of Thin Plates ~ a ~ ~ ~ ~ ~ 1 ~ a ~ ~ ~ Heeultaa ~ ~ ~ ~ ~ a... (cps) e M = symmetric mode, ie. 1, 2, 3, and 4. h= thickness of circular plate, in, Vhen there are mox'e than-thoro variables involved in the x esult, s of an experimental research, an empirical xelat, ionsh1p concerning the several variables may...

Ballentine, John Richard

2012-06-07T23:59:59.000Z

107

Rapid microbial identification by circular intensity differential scattering  

SciTech Connect (OSTI)

Circular Intensity Differential Scattering (CIDS) is one of the few really new approaches to microbial identification to have come into existence in the past several decades. The CIDS spectra can be measured as a function of wavelength, scattering angle, and/or matrix element, and a number of matrix elements can be measured virtually simultaneously. This panoply of measurements potentially gives the method resolving power for microbial identification. Some representative data taken over the past couple of years on CIDS spectra of several anti-viral vaccines is presented. 17 references; 9 figures.

Gregg, C.T.; Salzman, G.C.

1984-06-01T23:59:59.000Z

108

Comparison of operating speeds at spiral transition and circular curves  

E-Print Network [OSTI]

acceleration, fijs; and V = speed, mph In evaluating the models, it was found that the spiral length increases with increasing speed, but does not become unreasonably long. It was also found that the spiral length and spiral ang e epen o y on 1 d d nl... curves provide deceptive information to drivers is based on crash data for spiral curves, he does not present data for comparable circular curves In addition, the issue of whether the spiral curve is causing the crashes or whether crash rates...

Passetti, Karl Andrew

1998-01-01T23:59:59.000Z

109

On the circularly polarized optical emission from AE Aquarii  

E-Print Network [OSTI]

The reported nightly mean value of the circular polarization of optical emission observed from the close binary system AE Aqr is 0.06% (+-) 0.01%. We discuss a possibility that the observed polarized radiation is emitted mainly by the white dwarf or its vicinity. We demonstrate that this hypothesis is rather unlikely since the contribution of the white dwarf to the optical radiation of the system is too small. This indicates that the polarimetric data on AE Aqr cannot be used for the evaluation of the surface magnetic field strength of the white dwarf in this system.

N. R. Ikhsanov; S. Jordan; N. G. Beskrovnaya

2002-02-14T23:59:59.000Z

110

Federal Acquisition Circular 2005-52 Item Subject FAR case  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAX POLICIES ANDIndustrial HygieneEnergyLead-acidPrimusContinued on nextCircular

111

Federal Acquisition Regulation Federal Acquisition Circular 2005-61  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAX POLICIES ANDIndustrial HygieneEnergyLead-acidPrimusContinued onCircular1

112

Strong circular photogalvanic effect in ZnO epitaxial films  

SciTech Connect (OSTI)

A strong circular photogalvanic effect (CPGE) in ZnO epitaxial films was reported under interband excitation. It was observed that CPGE current is as large as 100 nA/W in ZnO, which is about one order in magnitude higher than that in InN film while the CPGE currents in GaN films are not detectable. The possible reasons for the above observations are the strong spin orbit coupling in ZnO or the inversed valence band structure of ZnO.

Zhang, Q.; Wang, X. Q.; Yin, C. M.; Shen, B. [State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 (China); Chen, Y. H.; Chang, K. [Laboratory of Semiconductor Materials Science, Institute of Semiconductors, CAS, Beijing 100083 (China); Ge, W. K. [Department of Physics, Tsinghua University, Beijing 100871 (China)

2011-12-23T23:59:59.000Z

113

Generator configuration for solid oxide fuel cells  

DOE Patents [OSTI]

Disclosed are improvements in a solid oxide fuel cell generator 1 having a multiplicity of electrically connected solid oxide fuel cells 2, where a fuel gas is passed over one side of said cells and an oxygen-containing gas is passed over the other side of said cells resulting in the generation of heat and electricity. The improvements comprise arranging the cells in the configuration of a circle, a spiral, or folded rows within a cylindrical generator, and modifying the flow rate, oxygen concentration, and/or temperature of the oxygen-containing gases that flow to those cells that are at the periphery of the generator relative to those cells that are at the center of the generator. In these ways, a more uniform temperature is obtained throughout the generator.

Reichner, Philip (Plum Boro, PA)

1989-01-01T23:59:59.000Z

114

Vehicle drive module having improved cooling configuration  

DOE Patents [OSTI]

An electric vehicle drive includes a thermal support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support. Power electronic circuits are thermally matched, such as between component layers and between the circuits and the support. The support may form a shield from both external EMI/RFI and from interference generated by operation of the power electronic circuits. Features may be provided to permit and enhance connection of the circuitry to external circuitry, such as improved terminal configurations. Modular units may be assembled that may be coupled to electronic circuitry via plug-in arrangements or through interface with a backplane or similar mounting and interconnecting structures.

Radosevich, Lawrence D.; Meyer, Andreas A.; Kannenberg, Daniel G.; Kaishian, Steven C.; Beihoff, Bruce C.

2007-02-13T23:59:59.000Z

115

Competing quasiparticle configurations in {sup 163}W  

SciTech Connect (OSTI)

Excited states in the neutron-deficient nuclide {sup 163}W were investigated using the {sup 106}Cd({sup 60}Ni,2pn){sup 163}W reaction at a beam energy of 270 MeV. The level scheme for {sup 163}W was extended significantly with the observation of five new band structures. The yrast band based on a 13/2{sup +} isomeric state is extended up to (57/2{sup +}). Two band structures were established on the 7/2{sup -} ground state. Quasiparticle configuration assignments for the new band structures were made on the basis of cranked Woods-Saxon shell-model calculations. The results reported in this article suggest that the negative-parity nu(f{sub 7/2},h{sub 9/2}) orbitals are responsible for the first rotational alignment in the yrast band.

Thomson, J.; Joss, D. T.; Paul, E. S.; Bianco, L.; Darby, I. G.; Grahn, T.; Page, R. D.; Pakarinen, J.; Sapple, P. J. [Oliver Lodge Laboratory, University of Liverpool, Liverpool, L69 7ZE (United Kingdom); Scholey, C.; Eeckhaudt, S.; Greenlees, P. T.; Jones, P.; Julin, R.; Juutinen, S.; Ketelhut, S.; Leino, M.; Nyman, M.; Rahkila, P.; Saren, J. [Department of Physics, University of Jyvaeskylae, FI-40014 Jyvaeskylae (Finland)

2010-01-15T23:59:59.000Z

116

Phase-field simulation of electric-field-induced in-plane magnetic domain switching in magnetic/ferroelectric layered heterostructures  

E-Print Network [OSTI]

). An alternative approach to engineering low electric- field-induced magnetic domain switching at room temperaPhase-field simulation of electric-field-induced in-plane magnetic domain switching in magnetic. Phys. Lett. 99, 182510 (2011) Quantum tunneling of the Bloch point in a magnetic film with strong

Chen, Long-Qing

117

NEAR-INFRARED CIRCULAR POLARIZATION IMAGES OF NGC 6334-V  

SciTech Connect (OSTI)

We present results from deep imaging linear and circular polarimetry of the massive star-forming region NGC 6334-V. These observations show high degrees of circular polarization (CP), as much as 22% in the K{sub s} band, in the infrared nebula associated with the outflow. The CP has an asymmetric positive/negative pattern and is very extended ({approx}80'' or 0.65 pc). Both the high CP and its extended size are larger than those seen in the Orion CP region. Three-dimensional Monte Carlo light-scattering models are used to show that the high CP may be produced by scattering from the infrared nebula followed by dichroic extinction by an optically thick foreground cloud containing aligned dust grains. Our results show not only the magnetic field orientation of around young stellar objects, but also the structure of circumstellar matter such as outflow regions and their parent molecular cloud along the line of sight. The detection of the large and extended CP in this source and the Orion nebula may imply the CP origin of the biological homochirality on Earth.

Kwon, Jungmi; Tamura, Motohide; Hashimoto, Jun; Kusakabe, Nobuhiko; Kandori, Ryo [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Lucas, Phil W.; Hough, James H. [Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield AL10 9AB (United Kingdom); Nakajima, Yasushi [Center of Information and Communication Technology, Hitotsubashi University, 2-1 Naka, Kunitachi, Tokyo 186-8601 (Japan); Nagayama, Takahiro [Department of Astrophysics, Nagoya University, Nagoya 464-8602 (Japan); Nagata, Tetsuya, E-mail: jungmi.kwon@nao.ac.jp [Department of Astronomy, Kyoto University, Kyoto 606-8502 (Japan)

2013-03-01T23:59:59.000Z

118

Method and apparatus configured for identification of a material  

DOE Patents [OSTI]

The present invention includes an apparatus configured for identification of a material, and methods of identifying a material. One embodiment of the invention provides an apparatus including a first region configured to receive a first sample, the first region being configured to output a first spectrum corresponding to the first sample and responsive to exposure of the first sample to radiation; a modulator configured to modulate the first spectrum according to a first frequency; a second region configured to receive a second sample, the second region being configured to output a second spectrum corresponding to the second sample and responsive to exposure of the second sample to the modulated first spectrum; and a detector configured to detect the second spectrum having a second frequency greater than the first frequency.

Slater, John M. (Idaho Falls, ID); Crawford, Thomas M. (Idaho Falls, ID)

2000-01-01T23:59:59.000Z

119

E-Print Network 3.0 - alters jejunal circular Sample Search Results  

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

circular or replication form intermediates, respectively. UV ... Source: Engelhardt, John F. - Department of Anatomy and Cell Biology, University of Iowa Collection: Biology...

120

E-Print Network 3.0 - administrative circulars rev Sample Search...  

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

>> 1 Virginia Polytechnic Institute and State University No. 3240 Rev.: 1 Policy and Procedures Date: February 15, 2005 Summary: similar costs. Circular A-21, Section F.6.b....

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Blank fire configuration for automatic pistol  

DOE Patents [OSTI]

A pistol configured to fire blank cartridges includes a modified barrel with a breech portion connected to an aligned inner sleeve. Around the inner sleeve, there is disposed an outer sleeve having a vent therein through which the cartridge discharges. The breech portion is connected to a barrel anchor to move backward in a slight arc when the pistol is fired. A spring retention rod projects from the barrel anchor and receives a shortened recoil spring therearound which recoil spring has one end abutting a stop on the barrel anchor and the other end in abutment with the end of a spring retaining cup. The spring retaining cup is engaged by a flange projecting from a slide so that when the pistol is fired, the slide moves rearwardly against the compression of the spring to eject the spent cartridge and then moves forwardly under the urging of the spring to load a fresh cartridge into the breech portion. The spring then returns all of the slidable elements to their initial position so that the pistol may again be fired.

Teague, Tommy L. (Albuquerque, NM)

1990-01-01T23:59:59.000Z

122

SAPHIRE 8 Software Configuration Management Plan  

SciTech Connect (OSTI)

The INL software developers use version control for both the formally released SAPHIRE versions, as well as for source code. For each formal release of the software, the developers perform an acceptance test: the software must pass a suite of automated tests prior to official release. Each official release of SAPHIRE is assigned a unique version identifier. The release is bundled into a standard installation package for easy and consistent set-up by individual users. Included in the release is a list of bug fixes and new features for the current release, as well as a history of those items for past releases. Each formal release of SAPHIRE will have passed an acceptance test. In addition to assignment of a unique version identifier for an official software release, each source code file is kept in a controlled library. Source code is a collection of all the computer instructions written by developers to create the finished product. The library is kept on a server, where back-ups are regularly made. This document describes the configuration management approach used as part of the SAPHIRE development.

Curtis Smith

2010-01-01T23:59:59.000Z

123

Stability of prograde and retrograde planets in circular binary systems  

E-Print Network [OSTI]

We investigate the stability of prograde versus retrograde planets in circular binary systems using numerical simulations. We show that retrograde planets are stable up to distances closer to the perturber than prograde planets. We develop an analytical model to compute the prograde and retrograde mean motion resonances' locations and separatrices. We show that instability is due to single resonance forcing, or caused by nearby resonances' overlap. We validate our results regarding the role of single resonances and resonances' overlap on orbit stability, by computing surfaces of section of the CR3BP. We conclude that the observed enhanced stability of retrograde planets with respect to prograde planets is due to essential differences between the phase-space topology of retrograde versus prograde resonances (at p/q mean motion ratio, prograde resonance is of order p - q while retrograde resonance is of order p + q).

M. H. M. Morais; C. A. Giuppone

2012-06-22T23:59:59.000Z

124

Large-amplitude circularly polarized electromagnetic waves in magnetized plasma  

SciTech Connect (OSTI)

We consider large-amplitude circularly polarized (LACP) waves propagating in a magnetized plasma. It is well-known that the dispersion relation for such waves coincides with the dispersion relation given by the linear theory. We develop the model of LACP wave containing a finite population of Cerenkov resonant particles. We find that the current of resonant particles modifies the linear dispersion relation. Dispersion curves of low-frequency (i.e., whistler and magnetosonic) waves are shifted toward larger values of the wave vector, i.e., waves with arbitrarily large wavelengths do not exist in this case. Dispersion curves of high-frequency waves are modified so that the wave phase velocity becomes smaller than the speed of light.

Vasko, I. Y., E-mail: vaskoiy@gmail.com; Artemyev, A. V.; Zelenyi, L. M. [Space Research Institute, RAS, Moscow (Russian Federation)] [Space Research Institute, RAS, Moscow (Russian Federation)

2014-05-15T23:59:59.000Z

125

Annular gap solitons in Kerr media with circular gratings  

SciTech Connect (OSTI)

We introduce standing-light patterns trapped in a Bragg grating written along the radial direction in a self-focusing (SF) or self-defocusing (SDF) optical medium. Unlike previously studied axisymmetric settings that deal with the axial propagation, we consider the propagation of light in the radial directions (outward and inward), which may give rise to annular gap solitons (AGSs), supported by the circular grating. An estimate for the threshold of the modulational instability of the AGS against azimuthal perturbations in the SF medium is obtained analytically, and verified by direct simulations. In the SDF model, stable annular and dipole solitons are found in a numerical form, while multipole patterns and vortex rings are unstable. Similar solitons are possible in the Bose-Einstein condensate.

Scheuer, Jacob [School of Electrical Engineering, Tel-Aviv University, Tel Aviv 69978 (Israel); Center for Nanoscience and Nanotechnology, Tel-Aviv University, Tel Aviv 69978 (Israel); Malomed, Boris [School of Electrical Engineering, Tel-Aviv University, Tel Aviv 69978 (Israel)

2007-06-15T23:59:59.000Z

126

Gauge Configurations for Lattice QCD from The Gauge Connection  

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

The Gauge Connection is an experimental archive for lattice QCD and a repository of gauge configurations made freely available to the community. Contributors to the archive include the Columbia QCDSP collaboration, the MILC collaboration, and others. Configurations are stored in QCD archive format, consisting of an ASCII header which defines various parameters, followed by binary data. NERSC has also provided some utilities and examples that will aid users in handling the data. Users may browse the archive, but are required to register for a password in order to download data. Contents of the archive are organized under four broad headings: Quenched (more than 1200 configurations); Dynamical, Zero Temperature (more than 300 configurations); MILC Improved Staggered Asqtad Lattices (more than 7000 configurations); and Dynamical, Finite Temperature (more than 1200 configurations)

127

Protein Characterisation by Synchrotron Radiation Circular Dichroism (SRCD) Spectroscopy  

SciTech Connect (OSTI)

Circular dichroism (CD) spectroscopy is a well-established technique for the study of proteins. Synchrotron radiation circular dichroism (SRCD) spectroscopy extends the utility of conventional CD spectroscopy (i.e. using laboratory-based instruments) because the high light flux from a synchrotron enables collection of data to lower wavelengths, detection of spectra with higher signal-to-noise levels and measurements in the presence of strongly absorbing non-chiral components such as salts, buffers, lipids and detergents. This review describes developments in instrumentation, methodologies and bioinformatics that have enabled new applications of the SRCD technique for the study of proteins. It includes examples of the use of SRCD spectroscopy for providing static and dynamic structural information on molecules, including determinations of secondary structures of intact proteins and domains, assessment of protein stability, detection of conformational changes associated with ligand and drug binding, monitoring of environmental effects, examination of the processes of protein folding and membrane insertion, comparisons of mutant and modified proteins, identification of intermolecular interactions and complex formation, determination of the dispositions of proteins in membranes, identification of natively disordered proteins and their binding partners and examination of the carbohydrate components of glycoproteins. It also discusses how SRCD can be used in conjunction with macromolecular crystallography and other biophysical techniques to provide a more complete picture of protein structures and functions, including how proteins interact with other macromolecules and ligands. This review also includes a discussion of potential new applications in structural and functional genomics using SRCD spectroscopy and future instrumentation and bioinformatics developments that will enable such studies. Finally, the appendix describes a number of computational/bioinformatics resources for secondary structure analyses that take advantage of the improved data quality available from SRCD. In summary, this review discusses how SRCD can be used for a wide range of structural and functional studies of proteins.

Wallace, B.

2009-01-01T23:59:59.000Z

128

Concealed configuration mixing and shape coexistence in the platinum nuclei  

SciTech Connect (OSTI)

The role of configuration mixing in the Pt region is investigated. The nature of the ground state changes smoothly, being spherical around mass A{approx} 174 and A{approx} 192 and deformed around the mid-shell N= 104 region. Interacting Boson Model with configuration mixing calculations are presented for deformations and isotope shifts. The assumption of the existence of two configurations with very different deformation provides a simple framework to explain the observed isotope shifts systematics.

Garcia-Ramos, J. E.; Hellemans, V.; Heyde, K. [Departamento de Fisica Aplicada, Universidad de Huelva, 21071 Huelva (Spain); Universite Libre de Bruxelles, Physique Nucleaire Theorique et Physique Mathematique, CP229, B-1050 Brussels (Belgium); Department of Physics and Astronomy, Ghent University, Proeftuinstraat 86, B-9000 Gent (Belgium)

2012-10-20T23:59:59.000Z

129

PHYSICAL REVIEW B 84, 144511 (2011) Rectification of vortex motion in a circular ratchet channel  

E-Print Network [OSTI]

PHYSICAL REVIEW B 84, 144511 (2011) Rectification of vortex motion in a circular ratchet channel N and induces a net vortex flow without any unbiased external drive, i.e., the ratchet effect. We show containing a single weak-pinning circular ratchet channel in a Corbino geometry and observed a substantial

Plourde, Britton L. T.

2011-01-01T23:59:59.000Z

130

Evaluation of Circular-Shaped Features on the Surface of Solar Cells from the  

E-Print Network [OSTI]

to earth, while the other one was jettisoned. Two solar panel assemblies of the retrieved wing wereEvaluation of Circular-Shaped Features on the Surface of Solar Cells from the Hubble Space by the manufacturer of the CMX coverglass of the HST solar cells, circular shaped features of unknown origin were

131

Cyclic Testing of Concrete-Filled Circular Steel Bridge Piers having Encased Fixed-Based Detail  

E-Print Network [OSTI]

Cyclic Testing of Concrete-Filled Circular Steel Bridge Piers having Encased Fixed-Based Detail elements during earthquakes, this paper reports on cyclic inelastic tests executed to determine the maximum strength and ductility of four concrete-filled circular steel piers joined to a foundation detail proposed

Bruneau, Michel

132

Vertical Electrical Sounding Configurations At Mt Princeton Hot...  

Open Energy Info (EERE)

navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Vertical Electrical Sounding Configurations At Mt Princeton Hot Springs Geothermal Area (Zohdy, Et Al.,...

133

applying product configuration: Topics by E-print Network  

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

recurrence satisfied by the Stirling numbers of the second kind. Abrams, Aaron; Hower, Valerie 2010-01-01 167 Equilibrium Configurations of Cantilever under Terminal Loads...

134

axicell configuration final: Topics by E-print Network  

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

recurrence satisfied by the Stirling numbers of the second kind. Abrams, Aaron; Hower, Valerie 2010-01-01 68 Integrated coverage and connectivity configuration in wireless...

135

Configuring Workstations for use with the PARS II System  

Broader source: Energy.gov [DOE]

This file provides the users with instructions on how to configure the workstations to work with the Department's Project Assessment Reporting System (PARS II)

136

absolute configurational entropies: Topics by E-print Network  

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

entropy -- which we evaluate with two different methods -- we show that a configurational entropy maximum is observed at a temperature close to that of the diffusivity maximum. Our...

137

ARM: Surface Radiation Measurement Quality Control testing, including climatologically configurable limits  

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

Surface Radiation Measurement Quality Control testing, including climatologically configurable limits

Hodges, Gary; Stoffel, Tom; Kutchenreiter, Mark; Kay, Bev; Habte, Aron; Ritsche, Michael; Morris, Victor; Anderberg, Mary

138

EXTREMAL CONFIGURATIONS OF ROBOT ARMS IN THREE DIMENSIONS  

E-Print Network [OSTI]

EXTREMAL CONFIGURATIONS OF ROBOT ARMS IN THREE DIMENSIONS DIRK SIERSMA Abstract. We define a volume function for a robot arm in R3 and give geometric conditions for its critical points. 1. Introduction configurations of planar polygonal linkages and open robot arms considered as the critical points of the oriented

Siersma, Dirk

139

A Case Study of a product software vendor's Customer Configuration  

E-Print Network [OSTI]

A Case Study of a product software vendor's Customer Configuration Updating Process: GX Creative Case Study of a product software vendor's Customer Configuration Updating Process: GX Creative Online the results of a case study of GX creative online development, a Dutch product software vendor, into its

Utrecht, Universiteit

140

Magnetic reconnection configurations and particle acceleration in solar flares  

E-Print Network [OSTI]

types of solar flares. Upper panel: two-ribbon flares; Lower panel: compact flares. The color shows space under different magnetic configurations. Key words: solar flares, magnetic reconnection, particleMagnetic reconnection configurations and particle acceleration in solar flares P. F. Chen, W. J

Chen, P. F.

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Verification of Network Management System Configurations David L. Cohrs  

E-Print Network [OSTI]

, with the use of simple, ad hoc tools. However in a large network, managing the net- work management system the amount of sharing and coordination possible in configuring the net- work management system. EachVerification of Network Management System Configurations David L. Cohrs (608) 262-6617 dave

Miller, Barton P.

142

NAVIERSTOKES ANALYSIS OF SUBSONIC FLOWFIELDS OVER A MISSILE CONFIGURATION  

E-Print Network [OSTI]

NAVIER­STOKES ANALYSIS OF SUBSONIC FLOWFIELDS OVER A MISSILE CONFIGURATION Ismail H.Tuncer \\Lambda Canard deflection angle INTRODUCTION The flow over a full missile configuration with ca­ nards and tails on the aerodynamic characteristics of canard­controlled missiles at high angles of attack is of considerable interest

Tuncer, Ismail H.

143

X-ray magnetic circular dichroism in (Ge,Mn) compounds: experiments and modeling Samuel Tardif,1, 2,  

E-Print Network [OSTI]

X-ray magnetic circular dichroism in (Ge,Mn) compounds: experiments and modeling Samuel Tardif,1, 2: July 29, 2013) X-ray absorption (XAS) and x-ray magnetic circular dichroism (XMCD) spectra at the L2),6 and x-ray spectroscopy (x-ray absorption spec- troscopy, XAS, and x-ray magnetic circular

144

Generation of circularly polarized radiation from a compact plasma-based extreme ultraviolet light source for tabletop X-ray magnetic circular dichroism studies  

SciTech Connect (OSTI)

Generation of circularly polarized light in the extreme ultraviolet (EUV) spectral region (about 25 eV–250 eV) is highly desirable for applications in spectroscopy and microscopy but very challenging to achieve in a small-scale laboratory. We present a compact apparatus for generation of linearly and circularly polarized EUV radiation from a gas-discharge plasma light source between 50 eV and 70 eV photon energy. In this spectral range, the 3p absorption edges of Fe (54 eV), Co (60 eV), and Ni (67 eV) offer a high magnetic contrast often employed for magneto-optical and electron spectroscopy as well as for magnetic imaging. We simulated and designed an instrument for generation of linearly and circularly polarized EUV radiation and performed polarimetric measurements of the degree of linear and circular polarization. Furthermore, we demonstrate first measurements of the X-ray magnetic circular dichroism at the Co 3p absorption edge with a plasma-based EUV light source. Our approach opens the door for laboratory-based, element-selective spectroscopy of magnetic materials and spectro-microscopy of ferromagnetic domains.

Wilson, Daniel; Rudolf, Denis, E-mail: d.rudolf@fz-juelich.de; Juschkin, Larissa [RWTH Aachen University, Experimental Physics of EUV, Steinbachstraße 15, 52074 Aachen (Germany); Forschungszentrum Jülich GmbH, Peter Grünberg Institut (PGI-9), JARA-FIT, 52425 Jülich (Germany); Weier, Christian; Adam, Roman; Schneider, Claus M. [Forschungszentrum Jülich GmbH, Peter Grünberg Institut (PGI-6), JARA-FIT, 52425 Jülich (Germany); Winkler, Gerrit; Frömter, Robert [Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, 20355 Hamburg (Germany); Danylyuk, Serhiy [RWTH Aachen University, Chair for Technology of Optical Systems, JARA-FIT, Steinbachstraße 15, 52074 Aachen (Germany); Bergmann, Klaus [Fraunhofer Institute for Laser Technology, Steinbachstrasse 15, 52074 Aachen (Germany); Grützmacher, Detlev [Forschungszentrum Jülich GmbH, Peter Grünberg Institut (PGI-9), JARA-FIT, 52425 Jülich (Germany)

2014-10-15T23:59:59.000Z

145

Magnetic instability in a dilute circular rarefaction wave  

SciTech Connect (OSTI)

The growth of magnetic fields in the density gradient of a rarefaction wave has been observed in simulations and in laboratory experiments. The thermal anisotropy of the electrons, which gives rise to the magnetic instability, is maintained by the ambipolar electric field. This simple mechanism could be important for the magnetic field amplification in astrophysical jets or in the interstellar medium ahead of supernova remnant shocks. The acceleration of protons and the generation of a magnetic field by the rarefaction wave, which is fed by an expanding circular plasma cloud, is examined here in form of a 2D particle-in-cell simulation. The core of the plasma cloud is modeled by immobile charges, and the mobile protons form a small ring close to the cloud's surface. The number density of mobile protons is thus less than that of the electrons. The protons of the rarefaction wave are accelerated to 1/10 of the electron thermal speed, and the acceleration results in a thermal anisotropy of the electron distribution in the entire plasma cloud. The instability in the rarefaction wave is outrun by a TM wave, which grows in the dense core distribution, and its magnetic field expands into the rarefaction wave. This expansion drives a secondary TE wave.

Dieckmann, M. E. [Department of Science and Technology (ITN), Linkoping University, 60174 Norrkoping (Sweden); Sarri, G.; Borghesi, M. [Centre for Plasma Physics, School of Mathematics and Physics, Queen's University of Belfast, Belfast BT7 1NN (United Kingdom)

2012-12-15T23:59:59.000Z

146

Circular Higgs Factories & Possible Long-Term Strategy  

E-Print Network [OSTI]

In 2012 two LHC experiments have discovered a new particle with a mass around 125 GeV, which appears to be the scalar Higgs boson of the Standard Model. To further examine this remarkable particle it could be produced in large numbers for precision studies by an e+e? collider operating near the ZH threshold at beam energies of 120 GeV, or, in the s-channel by a gamma-gamma collider with primary electron beam energies of 80 GeV, or by a high-energy electron-proton collider. In this talk I will discuss tentative design parameters, novel concepts and accelerator-physics challenges (1) for a high-luminosity lepton-hadron collider, bringing into collision a 60-GeV electron beam from an energy-recovery electron linac with one of the LHC hadron beams – LHeC –, (2) for a gamma-gamma Higgs-factory collider based on the reconfigured recirculating SC electron linac – SAPPHiRE – and (3) for a circular e+e? Higgs-factory collider in a new tunnel with a circumference of 80-100 km – TLEP. I will also discuss f...

Zimmermann, F

2013-01-01T23:59:59.000Z

147

Development of vortex state in circular magnetic nanodots: Theory and experiment RID A-9247-2009  

E-Print Network [OSTI]

We compare magnetic reversal of nanostructured circular magnetic dots of different sizes. This comparison is based on superconducting quantum interference device (SQUID) magnetometry, neutron scattering, Monte Carlo simulation, and analytical...

Mejia-Lopez, J.; Altbir, D.; Landeros, P.; Escrig, J.; Romero, A. H.; Roshchin, Igor V.; Li, C-P; Fitzsimmons, M. R.; Batlle, X.; Schuller, Ivan K.

2010-01-01T23:59:59.000Z

148

Experimental investigation of an oscillating circular piston positive displacement flowmeter: I - Piston movement and pressure losses.  

E-Print Network [OSTI]

Tests of an oscillating circular piston positive displacement flowmeter are described which focused on the effect on pressure drop across the meter of variation in key parameters. These included flow rate, liquid density and viscosity, mass...

Morton, Charlotte E; Hutchings, Ian M; Baker, Roger C

149

Experimental investigation of an oscillating circular piston positive displacement flowmeter: II - Leakage flows and wear tests.  

E-Print Network [OSTI]

Experimental data from an oscillating circular piston positive displacement flowmeter are described which focused on leakage flows and wear. This is the second part of a two part paper on the experimental tests, the first part concerned piston...

Morton, Charlotte E; Baker, Roger C; Hutchings, Ian M

150

E-Print Network 3.0 - adiabatic circular cylinder Sample Search...  

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

1983;105:161-7. 2 Balabani S, Yianneskis M... on the flow past a circular cylinder at a subcritical ... Source: Luo, Xiaoyu - Department of Mathematics, University of Glasgow...

151

Auto-configuration of Savants in a complex, variable network  

E-Print Network [OSTI]

In this thesis, present a system design that enables Savants to automatically configure both their network settings and their required application programs when connected to an intelligent data management and application ...

Yu, Joseph Hon

2005-01-01T23:59:59.000Z

152

Multi-channel atomic magnetometer for magnetoencephalography: A configuration study  

E-Print Network [OSTI]

emission tomography (PET). Specifically, due to its high temporal resolution, MEG has a unique position are a high rate of liquid helium consumption, fixed sensor configuration, frequent requirement for cryogenic

Romalis, Mike

153

High temperature solid electrolyte fuel cell configurations and interconnections  

DOE Patents [OSTI]

High temperature fuel cell configurations and interconnections are made including annular cells having a solid electrolyte sandwiched between thin film electrodes. The cells are electrically interconnected along an elongated axial outer surface.

Isenberg, Arnold O. (Forest Hills, PA)

1984-01-01T23:59:59.000Z

154

A study of neutron-deuteron scattering in configuration space  

E-Print Network [OSTI]

A new computational method for solving the configuration-space Faddeev equations for the breakup scattering problem has been applied to nd scattering both below and above the two-body threshold.

V. M. Suslov; M. A. Braun; I. Filikhin; B. Vlahovic

2006-10-09T23:59:59.000Z

155

Integrated Coverage and Connectivity Configuration for Energy Conservation  

E-Print Network [OSTI]

Integrated Coverage and Connectivity Configuration for Energy Conservation in Sensor Networks University in St. Louis An effective approach for energy conservation in wireless sensor networks: Sensor network, wireless ad hoc network, coverage, connectiv- ity, energy conservation, topology

Lu, Chenyang

156

Adsorption configurations of two nitrogen atoms on graphene  

SciTech Connect (OSTI)

We present calculations for different possible configurations of two nitrogen adatoms on graphene using the code VASP, based on Density Functional Theory (DFT). Two N atoms adsorbed on the graphene sheet can share a bond in two ways. They take positions either just above two adjacent carbon atoms or they form a bridge across opposite bonds of a hexagon in the graphene sheet. Both these configurations result into structural distortion of the sheet. Another stable configuration involving two N atoms consists of an N{sub 2} molecule which is physisorbed at a distance 3.69 Ĺ on the graphene sheet. Two N atoms can also be adsorbed on alternate bridge sites of neighbouring hexagons of graphene. This configuration again leads to distortion of the sheet in perpendicular direction.

Rani, Babita, E-mail: babitabaghla15@gmail.com [Department of Physics, Punjabi University, Patiala- 147 002 and Department of Physics, Panjab University, Chandigarh- 160 014 (India); Jindal, V. K.; Dharamvir, Keya [Department of Physics, Panjab University, Chandigarh- 160 014 (India)

2014-04-24T23:59:59.000Z

157

Constrained Density-Functional Theory--Configuration Interaction  

E-Print Network [OSTI]

In this thesis, I implemented a method for performing electronic structure calculations, "Constrained Density Functional Theory-- Configuration Interaction" (CDFT-CI), which builds upon the computational strengths of Density ...

Kaduk, Benjamin James

2012-01-01T23:59:59.000Z

158

Baffle Configuration Effects on Dynamo Self-Generation  

E-Print Network [OSTI]

Baffle Configuration Effects on Dynamo Self-Generation Understanding the Dynamics of the Earths Earth, an example of a self generating magnetic field. Self Generation, what helps: High magnetic

Anlage, Steven

159

Use of Crystals for High Energy Photon Beam Linear Polarization Conversion into Circular  

E-Print Network [OSTI]

The possibility to convert the photon beam linear polarization into circular one at photon energies of hundreds GeV with the use of crystals is considered. The energy and orientation dependencies of refractive indexes are investigated in case of diamond, silicon and germanium crystal targets. To maximize the values for figure of merit, the corresponding crystal optimal orientation angles and thickness are found. The degree of circular polarization and intensity of photon beam are estimated and possibility of experimental realization is discussed.

N. Z. Akopov; A. B. Apyan; S. M. Darbinyan

2000-02-17T23:59:59.000Z

160

Advanced configurations for leakage reduction in a labyrinth seal  

E-Print Network [OSTI]

ADVANCED CONFIGURATIONS FOR LEAKAGE REDUCTION IN A LABYRINTH SEAL A Thesis by SHARATH B. VELDANDA Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE December 1992 Major Subject: Mechanical Engineering ADVANCED CONFIGURATION FOR LEAKAGE REDUCTION IN A LABYRINTH SEAL A Thesis by SHARATH B. VELDANDA Approved as to style and content by: David L. Rhode y~~ (Member) K. D. Korkan (Member...

Veldanda, Sharath B.

1992-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Possible origin of the nonmonotonic doping dependence of the in-plane resistivity anisotropy of Ba(Fe1-xTx)?As? (T=Co, Ni and Cu)  

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

The in-plane resistivity anisotropy has been measured for detwinned single crystals of Ba(Fe1-xNix)?As? and Ba(Fe1-xCux)?As?. The data reveal a nonmonotonic doping dependence, similar to previous observations for Ba(Fe1-xCox)?As?. Magnetotransport measurements of the parent compound reveal a nonlinear Hall coefficient and a large linear term in the transverse magnetoresistance. Both effects are rapidly suppressed with chemical substitution over a similar compositional range as the onset of the large in-plane resistivity anisotropy. This suggests that the relatively small in-plane anisotropy of the parent compound in the spin-density wave state is due to the presence of an isotropic, high mobility pocket of the reconstructed Fermi surface. Progressive suppression of the contribution to the conductivity arising from this isotropic pocket with chemical substitution eventually reveals the underlying in-plane anisotropy associated with the remaining Fermi surface pockets

Kuo, Hsueh-Hui; Chu, Jiun-Haw; Riggs, Scott C.; Yu, Leo; McMahon, Peter L.; De Greve, Kristiaan; Yamamoto, Yoshihisa; Analytis, James G.; Fisher, Ian R.

2011-08-01T23:59:59.000Z

162

Composition dependence of the in-plane Cu-O bond-stretching LO phonon mode in YBa2Cu3O6+x  

SciTech Connect (OSTI)

An inelastic pulsed neutron scattering study was performed on the dependence of the dispersion and spectral intensity of the in-plane Cu-O bond-stretching LO phonon mode on doped charge density. The measurements were made in the time-of-flight mode with the multiangle position sensitive spectrometer of the ISIS facility on single crystals of YBa{sub 2}Cu{sub 3}O{sub 6+x} (x=0.15, 0.35, 0.6, 0.7, and 0.95). The focus of the study is the in-plane Cu-O bond-stretching LO phonon mode, which is known for strong electron-phonon coupling and unusual dependence on composition and temperature. It is shown that the dispersions for the samples with x=0.35, 0.6, and 0.7 are similar to the superposition of those for x=0.15 and 0.95 samples, and cannot be explained in terms of the structural anisotropy. It is suggested that the results are consistent with the model of nanoscale electronic phase separation, with the fraction of the phases being dependent on the doped charge density.

Stercil, F. [University of Pennsylvania; Egami, T. [University of Pennsylvania; Mook Jr, Herbert A [ORNL; Yethiraj, Mohana [ORNL; Chung, J.-H. [National Institute of Standards and Technology (NIST); Arai, M. [Institute of Materials Structure Science, Japan; Frost, C. [ISIS Facility, Rutherford Appleton Laboratory; Dogan, F. [University of Washington, Seattle

2008-01-01T23:59:59.000Z

163

Stochastic bifurcation and fractal and chaos control of a giant magnetostrictive film-shape memory alloy composite cantilever plate subjected to in-plane harmonic and stochastic excitation  

SciTech Connect (OSTI)

Stochastic bifurcation and fractal and chaos control of a giant magnetostrictive film–shape memory alloy (GMF–SMA) composite cantilever plate subjected to in-plane harmonic and stochastic excitation were studied. Van der Pol items were improved to interpret the hysteretic phenomena of both GMF and SMA, and the nonlinear dynamic model of a GMF–SMA composite cantilever plate subjected to in-plane harmonic and stochastic excitation was developed. The probability density function of the dynamic response of the system was obtained, and the conditions of stochastic Hopf bifurcation were analyzed. The conditions of noise-induced chaotic response were obtained in the stochastic Melnikov integral method, and the fractal boundary of the safe basin of the system was provided. Finally, the chaos control strategy was proposed in the stochastic dynamic programming method. Numerical simulation shows that stochastic Hopf bifurcation and chaos appear in the parameter variation process. The boundary of the safe basin of the system has fractal characteristics, and its area decreases when the noise intensifies. The system reliability was improved through stochastic optimal control, and the safe basin area of the system increased.

Zhu, Zhiwen, E-mail: zhuzhiwentju@163.com [Department of Mechanics, Tianjin University, Tianjin 300072 (China); Tianjin Key Laboratory of Nonlinear Dynamics and Chaos Control, Tianjin 300072 (China); Zhang, Qingxin, E-mail: zqxfirst@163.com; Xu, Jia, E-mail: xujia-ld@163.com [Department of Mechanics, Tianjin University, Tianjin 300072 (China)

2014-05-07T23:59:59.000Z

164

Long wavelength emitting GaInN quantum wells on metamorphic GaInN buffer layers with enlarged in-plane lattice parameter  

SciTech Connect (OSTI)

Metamorphic (i.e., linear composition graded) GaInN buffer layers with an increased in-plane lattice parameter, grown by plasma-assisted molecular beam epitaxy, were used as templates for metal organic vapor phase epitaxy (MOVPE) grown GaInN/GaInN quantum wells (QWs), emitting in the green to red spectral region. A composition pulling effect was observed allowing considerable higher growth temperatures for the QWs for a given In composition. The internal quantum efficiency (IQE) of the QWs was determined by temperature and excitation power density dependent photoluminescence (PL) spectroscopy. An increase in IQE by a factor of two was found for green emitting QWs grown on metamorphic GaInN buffer compared to reference samples grown on standard GaN buffer layers. The ratio of room temperature to low temperature intensity PL of the red emitting QWs were found to be comparable to the PL efficiency of green emitting QWs, both grown on metamorphic GaInN buffers. The excitation density and well width dependence of the IQE indicate a reduction of the quantum confined Stark effect upon growth on GaInN buffer layers with increased in-plane lattice parameter.

Däubler, J., E-mail: juergen.daeubler@iaf.fraunhofer.de; Passow, T.; Aidam, R.; Köhler, K.; Kirste, L.; Kunzer, M.; Wagner, J. [Fraunhofer-Institut für Angewandte Festkörperphysik, Tullastrasse 72, 79108 Freiburg (Germany)

2014-09-15T23:59:59.000Z

165

Radio Frequency Station - Beam Dynamics Interaction in Circular Accelerators  

SciTech Connect (OSTI)

The longitudinal beam dynamics in circular accelerators is mainly defined by the interaction of the beam current with the accelerating Radio Frequency (RF) stations. For stable operation, Low Level RF (LLRF) feedback systems are employed to reduce coherent instabilities and regulate the accelerating voltage. The LLRF system design has implications for the dynamics and stability of the closed-loop RF systems as well as for the particle beam, and is very sensitive to the operating range of accelerator currents and energies. Stability of the RF loop and the beam are necessary conditions for reliable machine operation. This dissertation describes theoretical formalisms and models that determine the longitudinal beam dynamics based on the LLRF implementation, time domain simulations that capture the dynamic behavior of the RF station-beam interaction, and measurements from the Positron-Electron Project (PEP-II) and the Large Hadron Collider (LHC) that validate the models and simulations. These models and simulations are structured to capture the technical characteristics of the system (noise contributions, non-linear elements, and more). As such, they provide useful results and insight for the development and design of future LLRF feedback systems. They also provide the opportunity to study diverse longitudinal beam dynamics effects such as coupled-bunch impedance driven instabilities and single bunch longitudinal emittance growth. Coupled-bunch instabilities and RF station power were the performance limiting effects for PEP-II. The sensitivity of the instabilities to individual LLRF parameters, the effectiveness of alternative operational algorithms, and the possible tradeoffs between RF loop and beam stability were studied. New algorithms were implemented, with significant performance improvement leading to a world record current during the last PEP-II run of 3212 mA for the Low Energy Ring. Longitudinal beam emittance growth due to RF noise is a major concern for LHC. Simulations studies and measurements were conducted that clearly show the correlation between RF noise and longitudinal bunch emittance, identify the major LLRF noise contributions, and determine the RF component dominating this effect. With these results, LHC upgrades and alternative algorithms are evaluated to reduce longitudinal emittance growth during operations. The applications of this work are described with regard to future machines and analysis of new technical implementations, as well as to possible future work which would continue the directions of this dissertation.

Mastoridis, Themistoklis; /Stanford U., Elect. Eng. Dept. /SLAC

2011-03-01T23:59:59.000Z

166

Stability and confinement of spheromaks and field-reversed configurations  

SciTech Connect (OSTI)

The formation, confinement and stability of two types of compact toroids, spheromaks and field reversed configurations (FRC), are reviewed. Spheromaks, which contain both toroidal and poloidal magnetic fields, have been formed with magnetized coaxial plasma guns, by a combination of Z- and theta-pinch techniques and by an electrodeless slow induction technique, and trapped in both prolate and oblate flux conservers. As predicted by theory, the prolate configuration is unstable to the tilt mode, but the oblate configuration with a conducting wall is stable. Configuration lifetimes of up to 0.8 ms are observed. The FRC is a high-beta, highly prolate compact toroid formed with field-reversed theta-pinch techniques and having purely poloidal magnetic field. Theory predicts unstable fluting and internal tilting modes, but they are not observed experimentally. Configurations with high densities approx. 10/sup 15/ cm/sup -3/ and with lifetimes of 50 to 120 ..mu..s are terminated by an n=2 rotational mode of instability.

Quinn, W.E.

1982-01-01T23:59:59.000Z

167

Weak formulations and solution multiplicity of equilibrium configurations with Coulomb friction  

E-Print Network [OSTI]

Weak formulations and solution multiplicity of equilibrium configurations with Coulomb friction configurations of elastic struc- tures in contact with Coulomb friction. We obtain a variational formulation configurations with arbitrary small friction coefficients. We illustrate the result in two space dimensions

Bostan, Mihai

168

Of fishes and birthdays: Efficient estimation of polymer configurational entropies  

E-Print Network [OSTI]

We present an algorithm to estimate the configurational entropy $S$ of a polymer. The algorithm uses the statistics of coincidences among random samples of configurations and is related to the catch-tag-release method for estimation of population sizes, and to the classic "birthday paradox". Bias in the entropy estimation is decreased by grouping configurations in nearly equiprobable partitions based on their energies, and estimating entropies separately within each partition. Whereas most entropy estimation algorithms require $N\\sim 2^{S}$ samples to achieve small bias, our approach typically needs only $N\\sim \\sqrt{2^{S}}$. Thus the algorithm can be applied to estimate protein free energies with increased accuracy and decreased computational cost.

Nemenman, Ilya; Strauss, Charlie E

2015-01-01T23:59:59.000Z

169

Inductrack III configuration--a maglev system for high loads  

DOE Patents [OSTI]

Inductrack III configurations are suited for use in transporting heavy freight loads. Inductrack III addresses a problem associated with the cantilevered track of the Inductrack II configuration. The use of a cantilevered track could present mechanical design problems in attempting to achieve a strong enough track system such that it would be capable of supporting very heavy loads. In Inductrack III, the levitating portion of the track can be supported uniformly from below, as the levitating Halbach array used on the moving vehicle is a single-sided one, thus does not require the cantilevered track as employed in Inductrack II.

Post, Richard F

2013-11-12T23:59:59.000Z

170

Equilibrium configurations of nematic liquid crystals on a torus  

E-Print Network [OSTI]

The topology and the geometry of a surface play a fundamental role in determining the equilibrium configurations of thin films of liquid crystals. We propose here a theoretical analysis of a recently introduced surface Frank energy, in the case of two-dimensional nematic liquid crystals coating a toroidal particle. Our aim is to show how a different modeling of the effect of extrinsic curvature acts as a selection principle among equilibria of the classical energy, and how new configurations emerge. In particular, our analysis predicts the existence of new stable equilibria with complex windings.

Antonio Segatti; Michael Snarski; Marco Veneroni

2014-06-13T23:59:59.000Z

171

Method for making precisely configured flakes useful in optical devices  

DOE Patents [OSTI]

Precisely configured, especially of geometric shape, flakes of liquid crystal material are made using a mechanically flexible polymer mold with wells having shapes which are precisely configured by making the mold with a photolithographically manufactured or laser printed master. The polymer liquid crystal is poured into the wells in the flexible mold. When the liquid crystal material has solidified, the flexible mold is bent and the flakes are released and collected for use in making an electrooptical cell utilizing the liquid crystal flakes as the active element therein.

Trajkovska-Petkoska, Anka (Rochester, NY); Jacobs, Stephen D. (Pittsford, NY); Kosc, Tanya Z. (Rochester, NY); Marshall, Kenneth L. (Rochester, NY)

2007-07-03T23:59:59.000Z

172

Evaluation Of Saltstone Mixer Paddle Configuration For Improved Wear Resistance  

SciTech Connect (OSTI)

A soft metal with low wear resistance (6000 series aluminum), was used to minimize run time while maximizing wear rate. Two paddle configurations were tested, with the first four paddles after the augers replaced by the wear paddles. The first configuration was all flat paddles, with the first paddle not aligned with the augers and is consistent with present SPF mixer. The second configuration had helical paddles for the first three stages after the augers and a flat paddle at the fourth stage. The first helical paddle was aligned with the auger flight for the second configuration. The all flat paddle configuration wear rate was approximately double the wear rate of the helical paddles for the first two sets of paddles after the augers. For both configurations, there was little or no wear on the third and fourth paddle sets based on mass change, indicating that the fully wetted premix materials are much less abrasive than the un-wetted or partially wetted premix. Additionally, inspection of the wear surface of the paddles at higher magnification showed the flat paddles were worn much more than the helical and is consistent with the wear rates. Aligning the auger discharge flight with the first set of helical paddles was effective in reducing the wear rate as compared to the flat paddle configuration. Changing the paddle configuration from flat to helical resulted in a slight increase in rheological properties. Although, both tests produced grout-like material that is within the processing rage of the SPF, it should be noted that cement is not included in the premix and water was used rather than salt solution, which does affect the rheology of the fresh grout. The higher rheological properties from the helical wear test are most likely due to the reduced number of shearing paddles in the mixer. In addition, there is variation in the rheological data for each wear test. This is most likely due to the way that the dry feeds enter the mixer from the dry feeder. The premix is discharged from the hopper in an unsteady fashion, where irregular sized clumps were observed leaving the discharge of the auger, though the auger speed is constant.

Reigel, M. M.; Fowley, M. D.; Pickenheim, B. R.

2012-09-27T23:59:59.000Z

173

" Rotating, In Plane Magnetization and Magneto-Optic Imaging of Cracks in Thick-Section Steel Under Stainless-Steel Cladding".  

SciTech Connect (OSTI)

The nondestructive inspection (NDI) of thick-section steel nuclear reactor pressure vessels (RPV'S) is rendered difficult by rough stainless steel cladding. Because the cladding condition is poorly known in most RPV's, an NDI technique that is unaffected by cladding roughness would be a major advance. Magneto-optic imaging is one such technique. The purpose of this project was to develop a novel method to induce rotating, in-plane magnetization, and to combine this capability with magneto-optic imaging to produce a self-contained inspection system. Imaging of cracks under thick cladding (0.250 inches) was demonstrated using a system capable, in principle, of performing robotic inspections, both inside & outside a typical boiling water reactor (BWR) RPV. This report, together publications listed, constitutes a comprehensive account of this work.

Gerald Fitzpatrick & Richard Skaugset

2000-10-13T23:59:59.000Z

174

Robust circularly polarized few-optical-cycle solitons in Kerr media  

SciTech Connect (OSTI)

We consider the propagation of circularly polarized few-cycle pulses (FCPs) in Kerr media beyond the slowly varying envelope approximation. Assuming that the frequency of the transition is far above the characteristic wave frequency (long-wave-approximation regime), we show that propagation of FCPs, taking into account the wave polarization, is described by the nonintegrable complex modified Korteweg-de Vries (cmKdV) equation. By direct numerical simulations, we get robust localized solutions to the cmKdV equation, which describe circularly polarized few-cycle-optical solitons and strongly differ from the breather soliton of the modified Korteweg-de Vries equation, which represents linearly polarized FCP solitons. The circularly polarized FCP soliton becomes unstable when the angular frequency is less than 1.5 times the inverse of the pulse length. The unstable subcycle pulses decay into linearly polarized half-cycle pulses, the polarization direction of which slowly rotates around the propagation axis.

Leblond, Herve; Sanchez, Francois [Laboratoire de Photonique d'Angers, EA 4464, Universite d'Angers, 2 Bd. Lavoisier, FR-49045 Angers Cedex 01 (France); Triki, Houria [Radiation Physics Laboratory, Department of Physics, Faculty of Sciences, Badji Mokhtar University, P.O. Box 12, DZ-23000 Annaba (Algeria); Mihalache, Dumitru [Laboratoire de Photonique d'Angers, EA 4464, Universite d'Angers, 2 Bd. Lavoisier, FR-49045 Angers Cedex 01 (France); Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH), 407 Atomistilor, Magurele-Bucharest, RO-077125 (Romania); Academy of Romanian Scientists, 54 Splaiul Independentei, Bucharest RO-050094 (Romania)

2011-06-15T23:59:59.000Z

175

Interaction of a circularly polarised gravitational wave with a charged particle in a static magnetic background  

E-Print Network [OSTI]

Interaction of a charged particle in a static magnetic background, i.e., a Landau system with circularly polarised gravitational wave (GW) is studied quantum mechanically in the long wavelength and low velocity limit. We quantize the classical Hamiltonian following \\cite{speli}. The rotating polarization vectors of the circularly polarized GW are employed to form a unique directional triad which served as the coordinate axes. The Schrodinger equations for the system are cast in the form of a set of coupled linear differential equations. This system is solved by iterative technique. We compute the time-evolution of the position and momentum expectation values of the particle. The results show that the resonance behaviour obtained earlier\\cite{emgw_classical} by classical treatements of the system has a quantum analogue not only for the linearly polarized GW \\cite{emgw_1_lin}, but for circularly polarized GW as well.

Sunandan Gangopadhyay; Anirban Saha; Swarup Saha

2014-12-24T23:59:59.000Z

176

Laser photons acquire circular polarization by interacting with a Dirac or Majorana neutrino beam  

E-Print Network [OSTI]

It is shown that for the reason of neutrinos being left-handed and their gauge-couplings being parity-violated, linearly polarized photons acquire their circular polarization by interacting with neutrinos. Calculating the ratio of linear and circular polarizations of laser photons interacting with either Dirac or Majorana neutrino beam, we obtain this ratio for the Dirac neutrino case, which is about twice less than the ratio for the Majorana neutrino case. Based on this ratio, we discuss the possibility of using advanced laser facilities and the T2K neutrino experiment to measure the circular polarization of laser beams interacting with neutrino beams in ground laboratories. This could be an additional and useful way to gain some insight into the physics of neutrinos, for instance their Dirac or Majorana nature.

Rohoollah Mohammadi; She-Sheng Xue

2014-03-14T23:59:59.000Z

177

A Highly Configurable Cache for Low Energy Embedded Systems  

E-Print Network [OSTI]

A Highly Configurable Cache for Low Energy Embedded Systems CHUANJUN ZHANG San Diego State University and FRANK VAHID and WALID NAJJAR University of California, Riverside Energy consumption is a major for about 50% of the total energy consumed in these systems. The performance of a given cache architecture

Najjar, Walid A.

178

Sustainability of Self-Configuring Wireless Sensor Bozena Kaminska  

E-Print Network [OSTI]

Sustainability of Self-Configuring Wireless Sensor Networks Bozena Kaminska Simon Fraser University monitoring and security. Those applications impose requirements for sustained, reliable, and fault-tolerant operation. We introduce a new ad-hoc wireless architecture in which forwarding is based on associativity

Gburzynski, Pawel

179

ON THE CONFIGURATION-LP FOR SCHEDULING ON UNRELATED MACHINES  

E-Print Network [OSTI]

ON THE CONFIGURATION-LP FOR SCHEDULING ON UNRELATED MACHINES JOSĂ? VERSCHAE AND ANDREAS WIESE Abstract. One of the most important open problems in machine scheduling is the problem of scheduling a set of jobs on unrelated machines to minimize the makespan. The best known approximation algorithm

Nabben, Reinhard

180

Novel Dipole Trapped Spheromak Configuration M. R. Brown,1,  

E-Print Network [OSTI]

Novel Dipole Trapped Spheromak Configuration M. R. Brown,1, * C. D. Cothran,1 J. Fung,1 M. J. Schaffer,2 and E. Belova3 We report the observation and characterization of a spheromak formed in the Swarthmore Spheromak Experiment (SSX) and trapped in a simple dipole magnetic field. The spheromak is studied

Brown, Michael R.

Note: This page contains sample records for the topic "in-plane circular configuration" 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

I.V. Stasyuk, O.V. Velychko CONFIGURATIONAL MODEL  

E-Print Network [OSTI]

Complex formation reactions of metal ions and ligand groups are of great importance due to pollution of environment by heavy metal (including actinides) species. In general this type of reaction can be described' & $ % I.V. Stasyuk, O.V. Velychko CONFIGURATIONAL MODEL OF METAL ION COMPLEX FORMATION IN WATER

182

Configuration Distribution and Designs of Codes in the Johnson Scheme  

E-Print Network [OSTI]

Configuration Distribution and Designs of Codes in the Johnson Scheme Tuvi Etzion Technion between perfect codes in the Johnson scheme and designs, and provide new tools for proving Delsarte conjecture that there are no nontrivial perfect codes in the Johnson scheme. Three topics will be considered

Etzion, Tuvi

183

Optimization of measurement configurations for geometrical calibration of industrial robot  

E-Print Network [OSTI]

, the accuracy of robotic manipulator depends on a number of factors. Usually, for the industrial applicationsOptimization of measurement configurations for geometrical calibration of industrial robot Alexandr of industrial robots employed in precise manufacturing. To identify geometric parameters, an advanced

Paris-Sud XI, Université de

184

On Cavitation, Configurational Forces and Implications for Fracture in  

E-Print Network [OSTI]

On Cavitation, Configurational Forces and Implications for Fracture in a Nonlinearly Elastic tensile stress can induce cavitation, that is, the appearance of voids that were not previously evident con- sequence of this viewpoint is that cavitation may then take place at a point

Sivaloganathan, J.

185

Instruction Set Extension with Shadow Registers for Configurable Processors  

E-Print Network [OSTI]

limitation in configurable processors, and then propose a novel low-cost architectural extension growing despite increasingly expensive CAD tools. This urges a move toward the use of programmable. Reconfigurable platforms, combined reconfigurable fabric with a general-purpose processor, are a promising

Cong, Jason "Jingsheng"

186

CONFIGURING A COLLABORATIVE VIRTUAL WORKSPACE FOR DISASTER MANAGEMENT OF  

E-Print Network [OSTI]

a strong impact on business. Oil & gas companies are thus continuously seeking to employ processesCONFIGURING A COLLABORATIVE VIRTUAL WORKSPACE FOR DISASTER MANAGEMENT OF OIL & GAS OFFSHORE workspace. Finally a prototype for oil & gas offshore structures disaster management based on our multi

Barbosa, Alberto

187

Electromagnetic Waves Propagation in 3D Plasma Configurations  

E-Print Network [OSTI]

Electromagnetic Waves Propagation in 3D Plasma Configurations Pavel Popovich, W. Anthony Cooper in a plasma strongly depends on the frequency, therefore the tools used for wave propagation studies are very that will allow for the calculation of the fields and energy deposition of a low-frequency wave propagating

188

Network Configuration and Management via Two-Phase Online Optimization  

E-Print Network [OSTI]

with highly dynamic behavior, it is not practical to accurately capture system's response with a model rates or variable demand profile. In this paper, we take the latter approach and perform in-situ trials the best configuration settings for networks is becoming more difficult. Manageabil- ity of large

Yuksel, Murat

189

Exploratory Patent Search with Faceted Search and Configurable Entity Mining  

E-Print Network [OSTI]

Exploratory Patent Search with Faceted Search and Configurable Entity Mining Pavlos Fafalios1 Searching for patents is usually a recall-oriented problem and depending on the patent search type, quite. We propose an exploratory strategy for patent search that exploits the metadata already available

Tzitzikas, Yannis

190

CRAD, Configuration Management- Los Alamos National Laboratory Weapons Facility  

Broader source: Energy.gov [DOE]

A section of Appendix C to DOE G 226.1-2 "Federal Line Management Oversight of Department of Energy Nuclear Facilities." Consists of Criteria Review and Approach Documents (CRADs) used for an assessment of the Configuration Management program at the Los Alamos National Laboratory, Weapons Facility.

191

Version Models for Software Configuration Management REIDAR CONRADI  

E-Print Network [OSTI]

" (project manage- ment, SCM, and quality assurance have come into operation). Furthermore, SCM plays and change requests), and audit and review (quality assurance func- tions to preserve product consistency based on configuration rules. Finally, we provide an overview of systems that have had significant

Redmiles, David F.

192

Effect of grooves cut on the periphery of a circular hole in bars subjected to tension  

E-Print Network [OSTI]

of FIASTER OF SClENCE August 1967 Plajor Suhj cot: ~Iechanical Engineerdng EI'1'ECT 01 GROOVES CUT OV THE PERIPHERY OF A CIRCULAR HOLE IN BARS SUBJECTED TO TENSION A Thesis by JUAN RICARDO SCHNALZ Approved as to style and content by: ~Head... ~ ~ ~ ~ ~ ~ ~ ~ ~ 19 20 21 Tube and 22 IV EFFECT. OF GROOVES CUT ON THZ PERIL'T~RX OF A CZN1ERZD CIRCULAR HOIZ IN BARS SUBJECTED TO TENSION . . . . . . . . . , 23 General Results and Discussion . . . 23 Comparison of Re ults and Conclu ion. 46 BIBLIOGRAPHY L9...

Schmalz, Juan Ricardo

1967-01-01T23:59:59.000Z

193

Configuration Management Plan for Tank Farm Restoration and Safe Operations Project W-314 [CANCELLED  

SciTech Connect (OSTI)

The W-314 configuration management (CM) plan describes the systems, processes and procedures for implementing CM.

MCGREW, D.L.

2001-01-12T23:59:59.000Z

194

Optical Rotatory and Circular Dichroic Scattering Werner Kaminsky,* Morten Andreas Geday, Javier Herreros-Cedres, and Bart Kahr*  

E-Print Network [OSTI]

Optical Rotatory and Circular Dichroic Scattering Werner Kaminsky,* Morten Andreas Geday, Javier, Washington 98195-1700 ReceiVed: June 23, 2002; In Final Form: NoVember 5, 2002 Optical effects are observed in regularly dyed crystals that serve to mimic optical rotation and circular dichroism by rotating the azimuth

Kaminsky, Werner

195

Yield drag in a two-dimensional foam flow around a circular obstacle: Effect of liquid fraction  

E-Print Network [OSTI]

Yield drag in a two-dimensional foam flow around a circular obstacle: Effect of liquid fraction of foams around a circular obstacle within a long channel. In experiments, we confine the foam between liquid and glass surfaces. In simulations, we use a deterministic software, the Surface Evolver

Cox, Simon

196

Classical and quantum chaos in a circular billiard with a straight cut  

E-Print Network [OSTI]

We study classical and quantum dynamics of a particle in a circular billiard with a straight cut. This system can be integrable, nonintegrable with soft chaos, or nonintegrable with hard chaos, as we vary the size of the cut. We use a quantum web to show differences in the quantum manifestations of classical chaos for these three different regimes.

Suhan Ree; L. E. Reichl

1998-07-09T23:59:59.000Z

197

GLOBAL EXISTENCE FOR A TRANSLATING NEAR-CIRCULAR HELE-SHAW BUBBLE WITH SURFACE TENSION  

E-Print Network [OSTI]

GLOBAL EXISTENCE FOR A TRANSLATING NEAR-CIRCULAR HELE-SHAW BUBBLE WITH SURFACE TENSION J. YE1 AND S for any nonzero surface tension despite the fact that a local planar approximation near the front problem, Dissipative equations, Hele-Shaw prob- lem, Translating bubbles, Surface tension Mathematics

Tanveer, Saleh

198

Flux tubes as the origin of Net Circular Polarization in Sunspot Penumbrae  

E-Print Network [OSTI]

We employ a 3-dimensional magnetohydrostatic model of a horizontal flux tube, embedded in a magnetic surrounding atmosphere, to successfully reproduce the azimuthal and center-to-limb variations of the Net Circular Polarization observed in sunspot penumbrae. This success is partly due to the realistic modeling of the interaction between the flux tube and the surrounding magnetic field.

J. M. Borrero; L. R. Bellot Rubio; D. A. N. Mueller

2007-07-27T23:59:59.000Z

199

Efficiency of pump absorption in double-clad fiber amplifiers. I. Fiber with circular symmetry  

E-Print Network [OSTI]

Efficiency of pump absorption in double-clad fiber amplifiers. I. Fiber with circular symmetry with an absorbing core is treated as a model for pump absorption in a double-clad optical fiber amplifier. Mode the pump absorption and is analyzed in the speckle-mode approximation for the example of a Kerr

Kouznetsov, Dmitrii

200

An All Metal High Power Circularly Polarized 100 MW RF Load  

SciTech Connect (OSTI)

A compact RF load has been designed using a cascaded array of lossy radial RF chokes to dissipate 100 MW peak and 8 kW average power uniformly along the length of the load. Operation in the circularly polarized Te{_}11 mode assures uniform dissipation azimuthally as well.

Fowkes, W.R.; Jongewaard, E.N.; Loewen, R.J.; Tantawi, S.G.; Vlieks, A.E.; /SLAC

2011-08-30T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Spatial impulse responses from a flexible baffled circular piston Ronald M. Aartsa)  

E-Print Network [OSTI]

Spatial impulse responses from a flexible baffled circular piston Ronald M. Aartsa) Philips response, Zernike expansion, piston sound radiation, non-uniform profile, loudspeaker, ultrasound 2 #12;I, baffled, planar piston is often done by using the spatial impulse response approach as can be found

202

Dynamics and control of the system of a 2-D rigid circular cylinder and point vortices  

E-Print Network [OSTI]

Dynamics and control of the system of a 2-D rigid circular cylinder and point vortices Zhanhua Ma dynamically interacting with N point vortices in its vicinity [16] is an idealized example of coupled solid from a fluid mechanics viewpoint as well as a dynamics and control viewpoint. The problem has many

Shashikanth, Banavara N.

203

Circular and Square Concrete Columns Externally Confined by CFRP Composite: Experimental  

E-Print Network [OSTI]

testing of the FRP composite. In existing models for FRP-confined concrete, it is commonly assumedChapter 6 Circular and Square Concrete Columns Externally Confined by CFRP Composite: Experimental limited. This field remains in its developmental stages and more testing and analysis are needed

Boyer, Edmond

204

Configuration and Validation of the LHC Beam Loss Monitoring System  

E-Print Network [OSTI]

The LHC Beam Loss Monitoring (BLM) system is one of the most complex instrumentation systems deployed in the LHC. As well as protecting the machine, the system is also used as a means of diagnosing machine faults, and providing feedback of losses to the control room and several systems such as the Collimation, the Beam Dump and the Post-Mortem. The system has to transmit and process signals from over 4’000 monitors, and has approaching 3 million configurable parameters. This paper describes the types of configuration data needed, the means used to store and deploy all the parameters in such a distributed system and how operators are able to alter the operating parameters of the system, particularly with regard to the loss threshold values. The various security mechanisms put in place, both at the hardware and software level, to avoid accidental or malicious modification of these BLM parameters are also shown for each case.

Zamantzas, C; Emery, J; Fitzek, J; Follin, F; Jackson, S; Kain, V; Kruk, G; Misiowiec, M; Roderick, C; Sapinski, M

2009-01-01T23:59:59.000Z

205

DFT STUDY REVISES INTERSTITIAL CONFIGURATIONS IN HCP Zr  

SciTech Connect (OSTI)

Analysis of experimental result on microstructure evolution in irradiated Zr and alloys has demonstrated that available knowledge on self-interstitial defects in Zr is in contradiction. We therefore have initiated an extensive theoretical and modeling program to clarify this issue. In this report we present first ab initio calculations results of single SIA configurations in Zr. We demonstrate importance of simulations cell size, applied exchange-correlation functional and simulated c/a ratio. The results obtained demonstrate clearly that the most stable configurations are in basal plane and provide some evidences for enhanced interstitial transport along basal planes. The results obtained will be used in generation a new interatomic potential for Zr to be used in large-scale atomistic modeling of mechanisms relevant for radiation-induced microstructure evolution.

Samolyuk, German D [ORNL; Golubov, Stanislav I [ORNL; Osetskiy, Yury N [ORNL; Stoller, Roger E [ORNL

2012-06-01T23:59:59.000Z

206

Configuration and temperature dependence of magnetic damping in spin valves  

SciTech Connect (OSTI)

Using vector-analyzer ferromagnetic resonance, we have studied the microwave susceptibility of a Py/Co/Cu/Co/MnIr spin valve over a large temperature range (5-450 K) and as a function of the magnetic configuration. An effective magnetization and Gilbert damping constant of 1.1 T and 0.021, respectively, are found for the permalloy free layer, with no discernible variation in temperature observed for either quantities. In contrast, the pinned layer magnetization is reduced by heating, and the exchange bias collapses near a temperature of 450 K. The ferromagnetic resonance linewidth of the free layer increases by 500 MHz when the layer magnetizations are aligned in antiparallel, which is attributed to a configuration-dependent contribution to the damping from spin pumping effects.

Joyeux, X.; Devolder, T.; Kim, Joo-Von; Gomez de la Torre, Y.; Eimer, S.; Chappert, C. [Institut d'Electronique Fondamentale, University Paris-Sud, 91405 Orsay (France); UMR8622, CNRS, University Paris-Sud, 91405 Orsay (France)

2011-09-15T23:59:59.000Z

207

Deep Trek Re-configurable Processor for Data Acquisition (RPDA)  

SciTech Connect (OSTI)

This report summarizes technical progress achieved during the cooperative research agreement between Honeywell and U.S. Department of Energy to develop a high-temperature Re-configurable Processor for Data Acquisition (RPDA). The RPDA development has incorporated multiple high-temperature (225C) electronic components within a compact co-fired ceramic Multi-Chip-Module (MCM) package. This assembly is suitable for use in down-hole oil and gas applications. The RPDA module is programmable to support a wide range of functionality. Specifically this project has demonstrated functional integrity of the RPDA package and internal components, as well as functional integrity of the RPDA configured to operate as a Multi-Channel Data Acquisition Controller. This report reviews the design considerations, electrical hardware design, MCM package design, considerations for manufacturing assembly, test and screening, and results from prototype assembly and characterization testing.

Bruce Ohme; Michael Johnson

2009-06-30T23:59:59.000Z

208

Room temperature in-plane ?100? magnetic easy axis for Fe{sub 3}O{sub 4}/SrTiO{sub 3}(001):Nb grown by infrared pulsed laser deposition  

SciTech Connect (OSTI)

We examine the magnetic easy-axis directions of stoichiometric magnetite films grown on SrTiO{sub 3}:Nb by infrared pulsed-laser deposition. Spin-polarized low-energy electron microscopy reveals that the individual magnetic domains are magnetized along the in-plane ?100? film directions. Magneto-optical Kerr effect measurements show that the maxima of the remanence and coercivity are also along in-plane ?100? film directions. This easy-axis orientation differs from bulk magnetite and films prepared by other techniques, establishing that the magnetic anisotropy can be tuned by film growth.

Monti, Matteo; Sanz, Mikel; Oujja, Mohamed; Rebollar, Esther; Castillejo, Marta; Marco, José F.; Figuera, Juan de la, E-mail: juan.delafiguera@iqfr.csic.es [Instituto de Química Física “Rocasolano,” CSIC, Madrid E-28006 (Spain); Pedrosa, Francisco J.; Bollero, Alberto [IMDEA Nanociencia, Instituto Madrileńo de Estudios Avanzados en Nanociencia, Madrid E-28049 (Spain); Camarero, Julio; Cuńado, Jose Luis F. [IMDEA Nanociencia, Instituto Madrileńo de Estudios Avanzados en Nanociencia, Madrid E-28049 (Spain); Dpto. de Física de la Materia Condensada, Universidad Autónoma de Madrid, Madrid E-28049 (Spain); Nemes, Norbert M. [Dpto. de Física Aplicada III, Universidad Complutense de Madrid, Madrid E-28040 (Spain); Mompean, Federico J.; Garcia-Hernández, Mar [Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid E-28049 (Spain); Nie, Shu; McCarty, Kevin F. [Sandia National Laboratories, Livermore, California 94550 (United States); N'Diaye, Alpha T.; Chen, Gong; Schmid, Andreas K. [Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

2013-12-14T23:59:59.000Z

209

Neutrinoless double beta decay studied with configuration mixing methods  

E-Print Network [OSTI]

We study neutrinoless double beta decay of several isotopes with state-of-the-art beyond self-consistent mean field methods to compute the nuclear matrix elements (NME). Generating coordinate method with particle number and angular momentum projection (GCM+PNAMP) is used for finding mother and granddaughter states and evaluating transition operators between different nuclei. We analyze explicitly the role of the deformation, pairing and configuration mixing in the evaluation of the NME.

Tomas R. Rodriguez; Gabriel Martinez-Pinedo

2010-12-08T23:59:59.000Z

210

Analytic energy gradients for constrained DFT-configuration interaction  

SciTech Connect (OSTI)

The constrained density functional theory-configuration interaction (CDFT-CI) method has previously been used to calculate ground-state energies and barrier heights, and to describe electronic excited states, in particular conical intersections. However, the method has been limited to evaluating the electronic energy at just a single nuclear configuration, with the gradient of the energy being available only via finite difference. In this paper, we present analytic gradients of the CDFT-CI energy with respect to nuclear coordinates, which gives the potential for accurate geometry optimization and molecular dynamics on both the ground and excited electronic states, a realm which is currently quite challenging for electronic structure theory. We report the performance of CDFT-CI geometry optimization for representative reaction transition states as well as molecules in an excited state. The overall accuracy of CDFT-CI for computing barrier heights is essentially unchanged whether the energies are evaluated at geometries obtained from quadratic configuration-interaction singles and doubles (QCISD) or CDFT-CI, indicating that CDFT-CI produces very good reaction transition states. These results open up tantalizing possibilities for future work on excited states.

Kaduk, Benjamin; Tsuchimochi, Takashi; Van Voorhis, Troy, E-mail: tvan@mit.edu [Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139 (United States)

2014-05-14T23:59:59.000Z

211

Measure Guideline: Optimizing the Configuration of Flexible Duct Junction Boxes  

SciTech Connect (OSTI)

This measure guideline offers additional recommendations to heating, ventilation, and air conditioning (HVAC) system designers for optimizing flexible duct, constant-volume HVAC systems using junction boxes within Air Conditioning Contractors of America (ACCA) Manual D guidance (Rutkowski, H. Manual D -- Residential Duct Systems, 3rd edition, Version 1.00. Arlington, VA: Air Conditioning Contractors of America, 2009.). IBACOS used computational fluid dynamics software to explore and develop guidance to better control the airflow effects of factors that may impact pressure losses within junction boxes among various design configurations (Beach, R., Prahl, D., and Lange, R. CFD Analysis of Flexible Duct Junction Box Design. Golden, CO: National Renewable Energy Laboratory, submitted for publication 2013). These recommendations can help to ensure that a system aligns more closely with the design and the occupants' comfort expectations. Specifically, the recommendations described herein show how to configure a rectangular box with four outlets, a triangular box with three outlets, metal wyes with two outlets, and multiple configurations for more than four outlets. Designers of HVAC systems, contractors who are fabricating junction boxes on site, and anyone using the ACCA Manual D process for sizing duct runs will find this measure guideline invaluable for more accurately minimizing pressure losses when using junction boxes with flexible ducts.

Beach, R.; Burdick, A.

2014-03-01T23:59:59.000Z

212

Mac configuration management at the Los Alamos National Laboratory  

SciTech Connect (OSTI)

The Los Alamos National Laboratory (LANL) had a need for central configuration management of non-Windows computers. LANL has three to five thousand Macs and an equal number of Linux based systems. The primary goal was to be able to inventory all non-windows systems and patch Mc OS X systems. LANL examined a number of commercial and open source solutions and ultimately selected Puppet. This paper will discuss why we chose Puppet, how we implemented it, and some lessons we learned along the way.

Marcus, Allan B [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

213

Quasi-isodynamic Configuration With N = 12 and High {beta}  

SciTech Connect (OSTI)

Results of an optimization toward quasi-isodynamicity for a stellarator with a comparatively large number of periods, N = 12, are presented. The following set of physics properties to be achieved was used: 1) good long-time collisionless confinement of {alpha}-particles; 2) small neoclassical transport in the 1/{nu} regime; 3) small bootstrap current; 4) high stability-{beta} limit. As a result, the boundary magnetic surface of a configuration is found that satisfies the above requirements for <{beta}> {approx_equal} 20%.

Mikhailov, M. I.; Isaev, M. Yu.; Subbotin, A. A.; Shafranov, V. D. [Russian Research Centre 'Kurchatov Institute', Moscow (Russian Federation); Nuehrenberg, C.; Nuehrenberg, J.; Zille, R. [Max-Planck-Institut fuer Plasmaphysik, IPP-EURATOM Association (Germany); Cooper, A. [CRPP, Association Euratom-Confederation Suisse, EPFL, Lausanne (Switzerland)

2006-11-30T23:59:59.000Z

214

EIA - Natural Gas Pipeline Network - Network Configuration & System Design  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia,(Million Barrels) Crude Oil Reserves in Nonproducing Reservoirs U.S. Department of EnergyD e sNetwork Configuration

215

Vortex configurations of bosons in an optical lattice  

SciTech Connect (OSTI)

The single-vortex problem in a strongly correlated bosonic system is investigated self-consistently within the mean-field theory of the Bose-Hubbard model. Near the superfluid-Mott-insulator transition, the vortex core has a tendency toward the Mott-insulating phase, with the core particle density approaching the nearest commensurate value. If the nearest-neighbor repulsion exists, the charge-density wave order may develop locally in the core. The evolution of the vortex configuration from the strong- to weak-coupling regions is studied. This phenomenon can be observed in systems of rotating ultracold atoms in optical lattices and Josephson-junction arrays.

Wu Congjun; Zhang Shoucheng [Department of Physics, McCullough Building, Stanford University, Stanford, California 94305-4045 (United States); Chen Handong [Department of Applied Physics, McCullough Building, Stanford University, Stanford, California 94305-4045 (United States); Hu Jiangpiang [Department of Physics and Astronomy, University of California, Los Angeles, California 90095-1547 (United States)

2004-04-01T23:59:59.000Z

216

Lateral forces on nanoparticles near a surface under circularly-polarized plane-wave illumination  

E-Print Network [OSTI]

Optical forces allow manipulation of small particles and control of nanophotonic structures with light beams. Here, we describe a counter-intuitive lateral optical force acting on particles placed above a substrate, under uniform plane wave illumination without any field gradients. We show that under circularly-polarized illumination, nanoparticles experience a lateral force as a result of dipolar, spin-sensitive scattering, with a magnitude comparable to other optical forces. To this end, we rigorously calculate the force experienced by a circularly polarized dipole radiating above a surface. Unlike for linearly-polarized dipoles, force components parallel to the surface can exist, caused by the recoil of unidirectional guided modes excited at the surface and/or by dipole-dipole interactions with the induced image dipole. These results were presented and discussed in conferences [1] and [2].

Rodríguez-Fortuńo, Francisco J; Engheta, Nader; Zayats, Anatoly V

2015-01-01T23:59:59.000Z

217

Circular geodesics and accretion disks in Janis-Newman-Winicour and Gamma metric  

E-Print Network [OSTI]

We study here circular timelike geodesics in the Janis-Newman-Winicour and Gamma metric spacetimes which contain a strong curvature naked singularity and reduce to the Schwarzschild metric for a specific value of one of the parameters. We show that for both the metrics the range of allowed parameters can be divided into three regimes where structure of the circular geodesics is qualitatively different. It follows that the properties of the accretion disks around such naked singularities can be significantly different from those of disks around black holes. This adds to previous studies showing that if naked singularities exist in nature, their observational signature would be significantly different from that of the black hole.

Anirban N. Chowdhury; Mandar Patil; Daniele Malafarina; Pankaj S. Joshi

2012-04-19T23:59:59.000Z

218

Laser shaping of a relativistic circularly polarized pulse by laser foil interaction  

SciTech Connect (OSTI)

Laser shaping of a relativistic circularly polarized laser pulse in ultra-intense laser thin-foil interaction is investigated by theoretical analysis and particle-in-cell simulations. It is found that the plasma foil as a nonlinear optical shutter has an obvious cut-out effect on the laser temporal and spatial profiles. Two-dimensional particle-in-cell simulations show that the high intensity part of a Gaussian laser pulse can be well extracted from the whole pulse. The transmitted pulse with longitudinal steep rise front and transverse super-Gaussian profile is thus obtained which would be beneficial for the radiation pressure acceleration regime. The Rayleigh-Taylor-like instability is observed in the simulations, which destroys the foil and results in the cut-out effect of the pulse in the rise front of a circularly polarized laser.

Zou, D. B.; Zhuo, H. B.; Yu, T. P.; Yang, X. H.; Shao, F. Q.; Ma, Y. Y.; Yin, Y.; Ouyang, J. M.; Ge, Z. Y.; Zhang, G. B. [College of Science, National University of Defense Technology, Changsha 410073 (China)] [College of Science, National University of Defense Technology, Changsha 410073 (China); Wang, P. [College of Computer, National University of Defense Technology, Changsha 410073 (China)] [College of Computer, National University of Defense Technology, Changsha 410073 (China)

2013-07-15T23:59:59.000Z

219

Use of Crystals for High Energy Photon Beam Linear Polarization Conversion into Circular  

E-Print Network [OSTI]

The possibility to convert the photon beam linear polarization into circularone at photon energies of hundreds GeV with the use of crystals is considered.The energy and orientation dependencies of refractive indexes are investigatedin case of diamond, silicon and germanium crystal targets. To maximize thevalues for figure of merit, the corresponding crystal optimal orientationangles and thickness are found. The degree of circular polarization andintensity of photon beam are estimated and possibility of experimentalrealization is discussed.

Akopov, N Z; Darbinian, S M

2000-01-01T23:59:59.000Z

220

MICROFLUIDIC MIXERS FOR THE INVESTIGATION OF PROTEIN FOLDING USING SYNCHROTRON RADIATION CIRCULAR DICHROISM SPECTROSCOPY  

SciTech Connect (OSTI)

The purpose of this study is to design, fabricate and optimize microfluidic mixers to investigate the kinetics of protein secondary structure formation with Synchrotron Radiation Circular Dichroism (SRCD) spectroscopy. The mixers are designed to rapidly initiate protein folding reaction through the dilution of denaturant. The devices are fabricated out of fused silica, so that they are transparent in the UV. We present characterization of mixing in the fabricated devices, as well as the initial SRCD data on proteins inside the mixers.

Kane, A; Hertzog, D; Baumgartel, P; Lengefeld, J; Horsley, D; Schuler, B; Bakajin, O

2006-03-20T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

First measurement of the circular beam asymmetry in the gamma p --> pi0 eta p reaction  

E-Print Network [OSTI]

The circular photon asymmetry for pi0 eta photoproduction on the proton was measured for the first time at the tagged photon facility of the MAMI C accelerator using the Crystal Ball/TAPS photon spectrometer. The experimental results are interpreted within a phenomenological isobar model that confirms the dominant role of the Delta(1700)D33 resonance. The measured asymmetry allows us to identify small contributions from positive-parity resonances via interference terms with the dominant D33 amplitude.

V. L. Kashevarov; A. Fix; P. Aguar-Bartolomé; L. K. Akasoy; J. R. M. Annand; H. J. Arends; K. Bantawa; R. Beck; V. Bekrenev; H. Berghäuser; A. Braghieri; D. Branford; W. J. Briscoe; J. Brudvik; S. Cherepnya; R. F. B. Codling; B. T. Demissie; E. J. Downie; P. Drexler; L. V. Fil'kov; D. I. Glazier; R. Gregor; D. Hamilton; E. Heid; D. Hornidge; I. Jaegle; O. Jahn; T. C. Jude; J. D. Kellie; I. Keshelashvili; R. Kondratiev; M. Korolija; M. Kotulla; A. Koulbardis; S. Kruglov; B. Krusche; V. Lisin; K. Livingston; I. J. D. MacGregor; Y. Maghrbi; D. M. Manley; M. Martinez-Fabregate; J. C. McGeorge; E. F. McNicoll; D. Mekterovic; V. Metag; S. Micanovic; D. Middleton; A. Mushkarenkov; B. M. K. Nefkens; A. Nikolaev; R. Novotny; M. Ostrick; P. B. Otte; B. Oussena; P. Pedroni; F. Pheron; A. Polonski; S. N. Prakhov; J. Robinson; G. Rosner; T. Rostomyan; S. Schumann; M. H. Sikora; D. Sober; A. Starostin; I. I. Stakovsky; I. M. Suarez; I. Supek; C. Tarbert; M. Thiel; A. Thomas; M. Unverzagt; D. P. Watts; D. Werthmüller; I. Zamboni; F. Zehr.

2010-09-24T23:59:59.000Z

222

Rotational stability of a long field-reversed configuration  

SciTech Connect (OSTI)

Rotationally driven modes of long systems with dominantly axial magnetic field are considered. We apply the incompressible model and order axial wavenumber small. A recently developed gyro-viscous model is incorporated. A one-dimensional equilibrium is assumed, but radial profiles are arbitrary. The dominant toroidal (azimuthal) mode numbers ?=1 and ?=2 modes are examined for a variety of non-reversed (B) and reversed profiles. Previous results for both systems with rigid rotor equilibria are reproduced. New results are obtained by incorporation of finite axial wavenumber and by relaxing the assumption of rigid electron and ion rotation. It is shown that the frequently troublesome ?=2 field reversed configuration (FRC) mode is not strongly affected by ion kinetic effects (in contrast to non-reversed cases) and is likely stabilized experimentally only by finite length effects. It is also shown that the ?=1 wobble mode has a complicated behavior and is affected by a variety of configuration and profile effects. The rotationally driven ?=1 wobble is completely stabilized by strong rotational shear, which is anticipated to be active in high performance FRC experiments. Thus, observed wobble modes in these systems are likely not driven by rotation alone.

Barnes, D. C., E-mail: coronadocon@msn.com; Steinhauer, L. C. [Tri Alpha Energy, Rancho Santa Margarita, California 92688 (United States)] [Tri Alpha Energy, Rancho Santa Margarita, California 92688 (United States)

2014-02-15T23:59:59.000Z

223

Shaft Siting and Configuration for Flexible Operating Mode  

SciTech Connect (OSTI)

The purpose of this document as stated in the ''Technical Work Plan for Subsurface Design Section FY 01 Work Activities'' (CRWMS M&O 2001a, pg. 14) is to review and evaluate the most current concepts for shaft siting and configuration. The locations of the shaft sites will be evaluated in reference to the overall subsurface ventilation layout shown in Figure 1. The scope will include discussions on pad size requirements, shaft construction components such as collars, shaft stations, sumps, ground support and linings, head frames, fan ducting and facility equipping. In addition to these, shaft excavation methodologies and integration with the overall subsurface construction schedule will be described. The Technical Work Plan (TWP), (CRWMS M&O 2001a), for this document has been prepared in accordance with AP-2.21Q, ''Quality Determinations and Planning for Scientific, Engineering and Regulatory Compliance Activities''. This document will be prepared in accordance with AP-3.10Q, ''Analysis and Models''. This document contributes to Site Recommendation (SR). The intended use of this document is to provide an analysis for shaft siting and configuration criteria for subsequent construction. This document identifies preliminary design concepts that should not be used for procurement, fabrication, or construction.

Robert Boutin

2001-08-02T23:59:59.000Z

224

Electron cyclotron emission spectrometry on the Tokamak a Configuration Variable  

SciTech Connect (OSTI)

Electron cyclotron emission (ECE) measurements are an important component of the diagnostic suite on the Tokamak a Configuration Variable (TCV) [F. Hoffman et al., Plasma Phys. Controlled Fusion 36, B277 (1994)]. A recently installed, 24-channel dual-conversion heterodyne radiometer covering the radio frequency range 65-100 GHz and viewing from the low-field side (LFS) of the tokamak greatly enhances the system and, in combination with an existing radiometer viewing from the high-field side (HFS), allows simultaneous measurements of emission from the HFS and LFS. In addition, the new radiometer has multiple lines of sight that can receive the emission perpendicular to the toroidal magnetic field as well as with a finite k{sub parallel} (wave vector parallel to magnetic field). Such flexibility allows the LFS radiometer to make standard measurements of thermal emission and nonstandard measurements of nonthermal, anisotropic emission. The toroidal line of sight allows access to overdense plasma via mode converted emission. The enhanced ECE diagnostic is described and examples of measurements made in various configurations are presented.

Klimanov, I.; Porte, L.; Alberti, S.; Blanchard, P.; Fasoli, A.; Goodman, T.P. [Centre de Recherches en Physique des Plasmas (CRPP), Association EURATOM-Confederation Suisse, Ecole Polytechnique Federale de Lausanne (EPFL), CH-1015, Lausanne (Switzerland)

2005-09-15T23:59:59.000Z

225

Electrostatic spherically symmetric configurations in gravitating nonlinear electrodynamics  

SciTech Connect (OSTI)

We perform a study of the gravitating electrostatic spherically symmetric (G-ESS) solutions of Einstein field equations minimally coupled to generalized nonlinear Abelian gauge models in three space dimensions. These models are defined by Lagrangian densities which are general functions of the gauge field invariants, restricted by some physical conditions of admissibility. They include the class of nonlinear electrodynamics supporting electrostatic spherically symmetric (ESS) nontopological soliton solutions in absence of gravity. We establish that the qualitative structure of the G-ESS solutions of admissible models is fully characterized by the asymptotic and central-field behaviors of their ESS solutions in flat space (or, equivalently, by the behavior of the Lagrangian densities in vacuum and on the point of the boundary of their domain of definition, where the second gauge invariant vanishes). The structure of these G-ESS configurations for admissible models supporting divergent-energy ESS solutions in flat space is qualitatively the same as in the Reissner-Nordstroem case. In contrast, the G-ESS configurations of the models supporting finite-energy ESS solutions in flat space exhibit new qualitative features, which are discussed in terms of the Arnowitt-Deser-Misner mass, the charge, and the soliton energy. Most of the results concerning well-known models, such as the electrodynamics of Maxwell, Born-Infeld, and the Euler-Heisenberg effective Lagrangian of QED, minimally coupled to gravitation, are shown to be corollaries of general statements of this analysis.

Diaz-Alonso, J.; Rubiera-Garcia, D. [LUTH, Observatoire de Paris, CNRS, , USAUniversite Paris Diderot, 5 Place Jules Janssen, 92190 Meudon (France) and Departamento de Fisica, Universidad de Oviedo, Avda. Calvo Sotelo 18, E-33007 Oviedo, Asturias (Spain)

2010-03-15T23:59:59.000Z

226

Snowflake divertor configuration studies for NSTX-Upgrade  

SciTech Connect (OSTI)

Snowflake divertor experiments in NSTX provide basis for PMI development toward NSTX-Upgrade. Snowflake configuration formation was followed by radiative detachment. Significant reduction of steady-state divertor heat flux observed in snowflake divertor. Impulsive heat loads due to Type I ELMs are partially mitigated in snowflake divertor. Magnetic control of snowflake divertor configuration is being developed. Plasma material interface development is critical for NSTX-U success. Four divertor coils should enable flexibility in boundary shaping and control in NSTX-U. Snowflake divertor experiments in NSTX provide good basis for PMI development in NSTX-Upgrade. FY 2009-2010 snowflake divertor experiments in NSTX: (1) Helped understand control of magnetic properties; (2) Core H-mode confinement unchanged; (3) Core and edge carbon concentration reduced; and (4) Divertor heat flux significantly reduced - (a) Steady-state reduction due to geometry and radiative detachment, (b) Encouraging results for transient heat flux handling, (c) Combined with impurity-seeded radiative divertor. Outlook for snowflake divertor in NSTX-Upgrade: (1) 2D fluid modeling of snowflake divertor properties scaling - (a) Edge and divertor transport, radiation, detachment threshold, (b) Compatibility with cryo-pump and lithium conditioning; (2) Magnetic control development; and (3) PFC development - PFC alignment and PFC material choice.

Soukhanovskii, V A

2011-11-12T23:59:59.000Z

227

Nonlinear coupling of left and right handed circularly polarized dispersive Alfvén wave  

SciTech Connect (OSTI)

The nonlinear phenomena are of prominent interests in understanding the particle acceleration and transportation in the interplanetary space. The ponderomotive nonlinearity causing the filamentation of the parallel propagating circularly polarized dispersive Alfvén wave having a finite frequency may be one of the mechanisms that contribute to the heating of the plasmas. The contribution will be different of the left (L) handed mode, the right (R) handed mode, and the mix mode. The contribution also depends upon the finite frequency of the circularly polarized waves. In the present paper, we have investigated the effect of the nonlinear coupling of the L and R circularly polarized dispersive Alfvén wave on the localized structures formation and the respective power spectra. The dynamical equations are derived in the presence of the ponderomotive nonlinearity of the L and R pumps and then studied semi-analytically as well as numerically. The ponderomotive nonlinearity accounts for the nonlinear coupling between both the modes. In the presence of the adiabatic response of the density fluctuations, the nonlinear dynamical equations satisfy the modified nonlinear Schrödinger equation. The equations thus obtained are solved in solar wind regime to study the coupling effect on localization and the power spectra. The effect of coupling is also studied on Faraday rotation and ellipticity of the wave caused due to the difference in the localization of the left and the right modes with the distance of propagation.

Sharma, R. P., E-mail: rpsharma@ces.iitd.ac.in; Sharma, Swati, E-mail: swati.sharma704@gmail.com; Gaur, Nidhi, E-mail: nidhiphysics@gmail.com [Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi 110016 (India)

2014-07-15T23:59:59.000Z

228

Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism  

E-Print Network [OSTI]

We have investigated the formation of close-in extrasolar giant planets through a coupling effect of mutual scattering, Kozai mechanism, and tidal circularization, by orbital integrations. We have carried out orbital integrations of three planets with Jupiter-mass, directly including the effect of tidal circularization. We have found that in about 30% runs close-in planets are formed, which is much higher than suggested by previous studies. We have found that Kozai mechanism by outer planets is responsible for the formation of close-in planets. During the three-planet orbital crossing, the Kozai excitation is repeated and the eccentricity is often increased secularly to values close enough to unity for tidal circularization to transform the inner planet to a close-in planet. Since a moderate eccentricity can remain for the close-in planet, this mechanism may account for the observed close-in planets with moderate eccentricities and without nearby secondary planets. Since these planets also remain a broad range of orbital inclinations (even retrograde ones), the contribution of this process would be clarified by more observations of Rossiter-McLaughlin effects for transiting planets.

M. Nagasawa; S. Ida; T. Bessho

2008-01-09T23:59:59.000Z

229

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

230

Synchrotron Radiation Circular Dichroism (SRCD) Spectroscopy - An Enhanced Method for Examining Protein Conformations and Protein Interactions  

SciTech Connect (OSTI)

CD (circular dichroism) spectroscopy is a well-established technique in structural biology. SRCD (synchrotron radiation circular dichroism) spectroscopy extends the utility and applications of conventional CD spectroscopy (using laboratory-based instruments) because the high flux of a synchrotron enables collection of data at lower wavelengths (resulting in higher information content), detection of spectra with higher signal-to-noise levels and measurements in the presence of absorbing components (buffers, salts, lipids and detergents). SRCD spectroscopy can provide important static and dynamic structural information on proteins in solution, including secondary structures of intact proteins and their domains, protein stability, the differences between wild-type and mutant proteins, the identification of natively disordered regions in proteins, and the dynamic processes of protein folding and membrane insertion and the kinetics of enzyme reactions. It has also been used to effectively study protein interactions, including protein-protein complex formation involving either induced-fit or rigid-body mechanisms, and protein-lipid complexes. A new web-based bioinformatics resource, the Protein Circular Dichroism Data Bank (PCDDB), has been created which enables archiving, access and analyses of CD and SRCD spectra and supporting metadata, now making this information publicly available. To summarize, the developing method of SRCD spectroscopy has the potential for playing an important role in new types of studies of protein conformations and their complexes.

B Wallace; R Janes

2011-12-31T23:59:59.000Z

231

Configure Microsoft Outlook 2011 for Mac HMS Help Desk: (617) 432-2000  

E-Print Network [OSTI]

Configure Microsoft Outlook 2011 for Mac HMS Help Desk: (617) 432 "Import". #12;Configure Microsoft Outlook 2011 for Mac HMS Help Desk Outlook 2011 for Mac HMS Help Desk: (617) 432-2000 3 · Select

Blackwell, Keith

232

Configure Microsoft Outlook 2011 for Mac HMS Help Desk: (617) 432-2000  

E-Print Network [OSTI]

Configure Microsoft Outlook 2011 for Mac HMS Help Desk: (617) 432 2011 for Mac HMS Help Desk: (617) 432-2000 2 · Create a new". #12;Configure Microsoft Outlook 2011 for Mac HMS Help Desk: (617) 432

Blackwell, Keith

233

Steady-state and equilibrium vortex configurations, transitions, and evolution in a mesoscopic superconducting cylinder  

E-Print Network [OSTI]

that the system passes through nearly metastable intermediate configurations while seeking the final minimum-energy steady state consistent with the square symmetry of the sample. An efficient scheme to determine the equilibrium vortex configuration in a...

Kim, S.; Hu, Chia-Ren; Andrews, MJ.

2004-01-01T23:59:59.000Z

234

Performance evaluation of configurable arrays with mesh interconnections and wormhole routing  

E-Print Network [OSTI]

configuration of the system, configuration must take place to map their domains. Building a parallel system is very expensive, and hence, we need solutions which allow to solve such problems on existing systems instead of designing a whole new system...

Krishnamoorthy, Deviusha

1997-01-01T23:59:59.000Z

235

Investigation of the effect of a circular patch of vegetation on turbulence generation and sediment deposition using four case studies  

E-Print Network [OSTI]

This study describes the spatial distribution of sediment deposition in the wake of a circular patch of model vegetation and the effect of the patch on turbulence and mean flow. Two difference types pf vegetation were used ...

Ortiz, Alejandra C

2012-01-01T23:59:59.000Z

236

MANAGING THE CONFIGURATION OF INFORMATION SYSTEMS WITH A FOCUS ON SECURITY  

E-Print Network [OSTI]

a well-defined process for managing and controlling secure system configurations, and for managing risks, and the integration of security into the configuration management process throughout the life cycle of the system for establishing secure configurations in information systems; flow charts for SecCM processes and activities

237

Configuration Management Plan for Tank Farm Restoration and Safe Operations Project W-314  

SciTech Connect (OSTI)

The Configuration Management Plan for Project W-314 describes the systems, processes and procedures for implementation of applicable configuration management practices described in HNF-0842, Volume 111, Section 3.1, ''Configuration Management Implementation''. This plan is tailored specifically for use by Project W-314.

MCGREW, D.L.

2000-04-19T23:59:59.000Z

238

Interface and process for enhanced transmission of non-circular ion beams between stages at unequal pressure  

DOE Patents [OSTI]

The invention discloses a new interface with non-circular conductance limit aperture(s) useful for effective transmission of non-circular ion beams between stages with different gas pressure. In particular, the invention provides an improved coupling of field asymmetric waveform ion mobility spectrometry (FAIMS) analyzers of planar or side-to-side geometry to downstream stages such as mass spectrometry or ion mobility spectrometry. In this case, the non-circular aperture is rectangular; other geometries may be optimum in other applications. In the preferred embodiment, the non-circular aperture interface is followed by an electrodynamic ion funnel that may focus wide ion beams of any shape into tight circular beams with virtually no losses. The jet disrupter element of the funnel may also have a non-circular geometry, matching the shape of arriving ion beam. The improved sensitivity of planar FAIMS/MS has been demonstrated in experiments using a non-contiguous elongated aperture but other embodiments (e.g., with a contiguous slit aperture) may be preferable, especially in conjunction with an ion funnel operated at high pressures.

Tang, Keqi (Richland, WA); Shvartsburg, Alexandre A. (Richland, WA); Smith, Richard D. (Richland, WA)

2008-03-04T23:59:59.000Z

239

Diquark condensation effects on hot quark star configurations  

E-Print Network [OSTI]

The equation of state for quark matter is derived for a nonlocal, chiral quark model within the mean field approximation. We investigate the effects of a variation of the form factors of the interaction on the phase diagram of quark matter under the condition of beta-equilibrium and charge neutrality. Special emphasis is on the occurrence of a diquark condensate which signals a phase transition to color superconductivity and its effects on the equation of state. We calculate the quark star configurations by solving the Tolman- Oppenheimer- Volkoff equations and obtain for the transition from a hot, normal quark matter core of a protoneutron star to a cool diquark condensed one a release of binding energy of the order of Delta M c^2 ~ 10^{53} erg. We discuss the claim that this energy could serve as an engine for explosive phenomena.

Blaschke, David B; Grigorian, H

2004-01-01T23:59:59.000Z

240

Ionization detector, electrode configuration and single polarity charge detection method  

DOE Patents [OSTI]

An ionization detector, an electrode configuration and a single polarity charge detection method each utilize a boundary electrode which symmetrically surrounds first and second central interlaced and symmetrical electrodes. All of the electrodes are held at a voltage potential of a first polarity type. The first central electrode is held at a higher potential than the second central or boundary electrodes. By forming the first and second central electrodes in a substantially interlaced and symmetrical pattern and forming the boundary electrode symmetrically about the first and second central electrodes, signals generated by charge carriers are substantially of equal strength with respect to both of the central electrodes. The only significant difference in measured signal strength occurs when the charge carriers move to within close proximity of the first central electrode and are received at the first central electrode. The measured signals are then subtracted and compared to quantitatively measure the magnitude of the charge.

He, Zhong (Ann Arbor, MI)

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Ionization detector, electrode configuration and single polarity charge detection method  

DOE Patents [OSTI]

An ionization detector, an electrode configuration and a single polarity charge detection method each utilize a boundary electrode which symmetrically surrounds first and second central interlaced and symmetrical electrodes. All of the electrodes are held at a voltage potential of a first polarity type. The first central electrode is held at a higher potential than the second central or boundary electrodes. By forming the first and second central electrodes in a substantially interlaced and symmetrical pattern and forming the boundary electrode symmetrically about the first and second central electrodes, signals generated by charge carriers are substantially of equal strength with respect to both of the central electrodes. The only significant difference in measured signal strength occurs when the charge carriers move to within close proximity of the first central electrode and are received at the first central electrode. The measured signals are then subtracted and compared to quantitatively measure the magnitude of the charge. 10 figs.

He, Z.

1998-07-07T23:59:59.000Z

242

Mapping the location and configuration of nitrogen in diamond nanoparticles.  

SciTech Connect (OSTI)

Understanding how impurities such as nitrogen are included in diamond nanoparticles is expected to be important for use in future nanodevices, such as qubits for quantum computing. Most commercial diamond nanoparticles contain approximately 2-3% nitrogen, but it is difficult to determine experimentally whether it is located within the core or at the surface of the nanoparticles. Presented here are density functional tight-binding simulations examining the configuration and potential energy surface of substitutional nitrogen in diamond nanoparticles, directly comparing results of different sizes, shapes and surface chemistry. The results predict that nitrogen is metastable within the core of both hydrogenated and dehydrogenated particles, but that the binding energy, coordination and preferred location is dependent upon the structure of the nanoparticle as a whole.

Barnard, A. S.; Sternberg, M.; Center for Nanoscale Materials; Univ. of Oxford

2007-01-17T23:59:59.000Z

243

APPLICATION OF NONSPHERICAL FISSILE CONFIGURATION IN WASTE CONTAINERS AT SRS  

SciTech Connect (OSTI)

Transuranic (TRU) solid waste that has been generated as a result of the production of nuclear material for the United States defense program at the Savannah River Site (SRS) has been stored in more than 30,000 55-gallon drums and carbon steel boxes since 1953. Nearly two thirds of those containers have been processed and shipped to the Waste Isolation Pilot Plant. Among the containers assayed so far, the results indicate several drums with fissile inventories significantly higher (600-1000 fissile grams equivalent (FGE) {sup 239}Pu) than their original assigned values. While part of this discrepancy can be attributed to the past limited assay capabilities, human errors are believed to be the primary contributor. This paper summarizes the application of nonspherical fissile material configuration in waste containers, resulting in less restrictive mass and spacing limits, increased storage capacity, and several administrative controls for handling and storage of waste containers being modified without compromising safety.

Eghbali, D; Michelle Abney, M

2007-01-03T23:59:59.000Z

244

Cycle Configurations for a PBMR Steam and Electricity Production Plant  

SciTech Connect (OSTI)

The Pebble Bed Modular Reactor (PBMR) is an advanced helium-cooled, graphite moderated High Temperature Gas-cooled Reactor (HTGR) that is capable of multiple missions. The petrochemical industry requires the use of high temperature steam and electricity for their processes. Currently coal or natural gas is utilised for the generation of high temperature steam and electricity, which under-utilises natural resources and in the process emits CO{sub 2} into the atmosphere. This paper provides an overview of the PBMR product development path and discusses how steam production forms part of the future possibilities of the PBMR technology. Suitable cycle configurations for both process steam and electricity generation as required by petrochemical plants are discussed. (authors)

Matzner, Dieter; Kriel, Willem; Correia, Michael; Greyvenstein, Renee [PBMR - Pty - Ltd, Lake Buena Vista Building, 1267 Gordon Hood Avenue, Centurion, PO Box 9396, Centurion 0046 (South Africa)

2006-07-01T23:59:59.000Z

245

Configuration and technology implications of potential nuclear hydrogen system applications.  

SciTech Connect (OSTI)

Nuclear technologies have important distinctions and potential advantages for large-scale generation of hydrogen for U.S. energy services. Nuclear hydrogen requires no imported fossil fuels, results in lower greenhouse-gas emissions and other pollutants, lends itself to large-scale production, and is sustainable. The technical uncertainties in nuclear hydrogen processes and the reactor technologies needed to enable these processes, as well waste, proliferation, and economic issues must be successfully addressed before nuclear energy can be a major contributor to the nation's energy future. In order to address technical issues in the time frame needed to provide optimized hydrogen production choices, the Nuclear Hydrogen Initiative (NHI) must examine a wide range of new technologies, make the best use of research funding, and make early decisions on which technology options to pursue. For these reasons, it is important that system integration studies be performed to help guide the decisions made in the NHI. In framing the scope of system integration analyses, there is a hierarchy of questions that should be addressed: What hydrogen markets will exist and what are their characteristics? Which markets are most consistent with nuclear hydrogen? What nuclear power and production process configurations are optimal? What requirements are placed on the nuclear hydrogen system? The intent of the NHI system studies is to gain a better understanding of nuclear power's potential role in a hydrogen economy and what hydrogen production technologies show the most promise. This work couples with system studies sponsored by DOE-EE and other agencies that provide a basis for evaluating and selecting future hydrogen production technologies. This assessment includes identifying commercial hydrogen applications and their requirements, comparing the characteristics of nuclear hydrogen systems to those market requirements, evaluating nuclear hydrogen configuration options within a given market, and identifying the key drivers and thresholds for market viability of nuclear hydrogen options.

Conzelmann, G.; Petri, M.; Forsberg, C.; Yildiz, B.; ORNL

2005-11-05T23:59:59.000Z

246

Alternative configurations for the waste-handling building at the Yucca Mountain Repository  

SciTech Connect (OSTI)

Two alternative configurations of the waste-handling building have been developed for the proposed nuclear waste repository in tuff at Yucca Mountain, Nevada. One configuration is based on criteria and assumptions used in Case 2 (no monitored retrievable storage facility, no consolidation), and the other configuration is based on criteria and assumptions used in Case 5 (consolidation at the monitored retrievable storage facility) of the Monitored Retrievable Storage System Study for the Repository. Desirable waste-handling design concepts have been selected and are included in these configurations. For each configuration, general arrangement drawings, plot plans, block flow diagrams, and timeline diagrams are prepared.

NONE

1990-08-01T23:59:59.000Z

247

Analysis of three idealized reactor configurations: plate, pin, and homogeneous. [LMFBR  

SciTech Connect (OSTI)

Detailed Monte Carlo calculations have been performed for three distinct configurations of an idealized fast critical assembly. This idealized assembly was based on the LMFBR benchmark critical assembly ZPR-6/7. In the first configuration, the entire core was loaded with the plate unit cell of ZPR-6/7. In the second configuration, the entire core was loaded with the ZPR sodium-filled pin calandria. The actual ZPR pin calandria are loaded with mixed (U,Pu) oxide pins which closely match the composition of the ZPR-6/7 plate unit cell. For the present study, slight adjustments were made in the atom concentrations and the length of the pin calandria in order to make the core boundaries and average composition for the pin-cell configuration identical to those of the plate-cell configuration. In the third configuration, the core was homogeneous, again with identical core boundaries and average composition as the plate and pin configurations.

McKnight, R.D.

1983-01-01T23:59:59.000Z

248

Apparatus configured for identification of a material and method of identifying a material  

DOE Patents [OSTI]

The present invention relates to an apparatus configured for identification of a material and method of identifying a material. One embodiment of the present invention provides an apparatus configured for identification of a material including a first region configured to receive a first sample and output a first spectrum responsive to exposure of the first sample to radiation; a signal generator configured to provide a reference signal having a reference frequency and a modulation signal having a modulation frequency; a modulator configured to selectively modulate the first spectrum using the modulation signal according to the reference frequency; a second region configured to receive a second sample and output a second spectrum responsive to exposure of the second sample to the first spectrum; and a detector configured to detect the second spectrum.

Slater, John M. (Idaho Falls, ID); Crawford, Thomas M. (Idaho Falls, ID); Frickey, Dean A. (Idaho Falls, ID)

2001-01-01T23:59:59.000Z

249

Dynamics of a drop trapped inside a horizontal circular hydraulic jump  

E-Print Network [OSTI]

A drop of moderate size deposited inside a horizontal circular hydraulic jump of the same liquid remains trapped at the shock front and does not coalesce. In this situation the drop is moving along the jump and one observes two different motions: a periodic one (it orbitates at constant speed) and an irregular one involving reversals of the orbital motion. Modeling the drop as a rigid sphere exchanging friction with liquid across a thin film of air, we recover the orbital motion and the internal rotation of the drop. This internal rotation is experimentally observed.

Duchesne, Alexis; Lebon, Luc; Pirat, Christophe; Limat, Laurent

2013-01-01T23:59:59.000Z

250

Orbits and reversals of a drop rolling inside a horizontal circular hydraulic jump  

E-Print Network [OSTI]

We explore the complex dynamics of a non-coalescing drop of moderate size inside a circular hydraulic jump of the same liquid formed on a horizontal disk. In this situation the drop is moving along the jump and one observes two different motions: a periodic one (it orbitates at constant speed) and an irregular one involving reversals of the orbital motion. Modeling the drop as a rigid sphere exchanging friction with liquid across a thin film of air, we recover the orbital motion and the internal rotation of the drop. This internal rotation is experimentally observed.

Alexis Duchesne; Clément Savaro; Luc Lebon; Christophe Pirat; Laurent Limat

2013-02-14T23:59:59.000Z

251

Intense terahertz emission from relativistic circularly polarized laser pulses interaction with overdense plasmas  

SciTech Connect (OSTI)

During the interaction of a relativistic circularly polarized laser pulse with an overdense plasma target, the longitudinal motion of bunches of electrons under the action of light pressure and electrostatic restore force can emit intense terahertz (THz) pulses. This mechanism allows high pump laser intensity and large electron number participating in the emission. Two-dimensional particle-in-cell simulations are carried out to investigate the THz emission. The results suggest that such a source can produce remarkably intense THz pulses with energy of several mJ/sr and power of tens of gigawatts, which could find applications in nonlinear studies and relativistic laser-plasma interaction diagnostics.

Chen, Zi-Yu; Li, Xiao-Ya [National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900 (China)] [National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900 (China); Yu, Wei [Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)] [Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)

2013-10-15T23:59:59.000Z

252

Rapid purification of circular DNA by triplex-mediated affinity capture  

DOE Patents [OSTI]

A single-step capture of a target supercoiled double-stranded DNA molecule is accomplished by forming a local triple-helix among two strands of the supercoiled circular DNA and an oligonucleotide probe. The oligonucleotide is bound to an immobilizing support which facilitates the immobilization and purification of target DNA molecules. Non-target DNA molecules and other contaminating cellular material are easily removed by washing. The triple-helical structure is destabilized by raising the pH, leaving purified target DNA in the supernatant and reusable affinity capture oligonucleotide secured to the immobilizing support. 3 figs.

Ji, H.; Smith, L.M.

1997-01-07T23:59:59.000Z

253

Flows of Incompressible Newtonian and Generalized Newtonian Fluids over a Circular Cylinder  

E-Print Network [OSTI]

This thesis presents numerical solutions of the boundary value problems describing the isothermal and non-isothermal steady flows of incompressible Newtonian, power-law and Carreau fluids over a circular cylinder using the hpk-finite element process...g_i...max fluids (power-law and Carreau models) only shear thinning fluids are considered. Numerical studies demonstrate decoupled behavior of the temperature field from the rest of the deformation field. Shear thinning behavior and viscous dissipation for progressively increasing Reynolds numbers are simulated accurately without any difficulty....

Klein, Kayla

2012-05-31T23:59:59.000Z

254

Noncommutative quantum mechanics of simple matter systems interacting with circularly polarized gravitational waves  

E-Print Network [OSTI]

The response of a test particle, both for the free case and under the harmonic oscillator potential, to circularly polarized gravitational waves is investigated in a noncommutative quantum mechanical setting. The system is quantized following the prescription in \\cite{ncgw1}. Standard algebraic techniques are then employed to solve the Hamiltonian of the system. The solutions, in both cases, show signatures of the coordinate noncommutativity. In the harmonic oscillator case, this signature plays a key role in altering the resonance point and the oscillation frequency of the system.

Sunandan Gangopadhyay; Anirban Saha; Swarup Saha

2014-09-11T23:59:59.000Z

255

Self-focusing of circularly polarized laser pulse propagating through a magnetized non-Maxwellian plasma  

SciTech Connect (OSTI)

Self-focusing of an intense circularly polarized laser pulse propagating through a magnetized non-Maxwellian plasma is investigated. Based on a relativistic two-fluid model, nonlinear equation describing dynamics of the slowly varying amplitude is obtained. The evolution of laser spot size is studied and effect of non-Maxwellian distribution of charge density on the spot size is considered. It is shown that the existence of super-thermal particles leads to the enhancement of the self-focusing quality of plasma.

Sepehri Javan, N., E-mail: sepehri-javan@uma.ac.ir [Department of physics, University of Mohaghegh Ardabili, PO Box 179, Ardabil (Iran, Islamic Republic of)

2014-10-15T23:59:59.000Z

256

Scour around a group of circular piles caused by waves and currents  

E-Print Network [OSTI]

Major Subject: Ocean Engineering SCOUR AROUND A GROUP OF CIRCULAR PILES CAUSED BY WAVES AND CURRENTS A Thesis by TA-YANG LEE Approved as to style and content by: John B. Herbich (Chairman of Committee) Robert O. Reid (Member) Gi lio V... ) 50 10 FIG. 2. ? Critical shear stress for Quartz sediment in water as function of grain size 10 10 e a 1 V o 5 upper (tmit "1" 1 " m o 1 5 5 1 o So Mean Sediment Size& mm FIG. 3. ? Critical water velocities for Quartz sediment as function...

Lee, Ta-Yang

1983-01-01T23:59:59.000Z

257

Federal Acquisition Regulation Federal Acquisition Circular 2005-62 Summary of Rules  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAX POLICIES ANDIndustrial HygieneEnergyLead-acidPrimusContinued onCircular12

258

Federal Acquisition Regulation Federal Acquisition Circular 2005-65 Summary of Rules  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAX POLICIES ANDIndustrial HygieneEnergyLead-acidPrimusContinued onCircular125

259

Federal Acquisition Regulation Federal Acquisition Circular 2005-66 Summary of Rules  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAX POLICIES ANDIndustrial HygieneEnergyLead-acidPrimusContinued onCircular1256

260

Federal Acquisition Regulation Federal Acquisition Circular 2005-68 Summary of Rule  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAX POLICIES ANDIndustrial HygieneEnergyLead-acidPrimusContinued onCircular12568

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Federal Acquisition Regulation Federal Acquisition Circular 2005-69 Summary of Rules  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAX POLICIES ANDIndustrial HygieneEnergyLead-acidPrimusContinued onCircular125689

262

Federal Acquisition Regulation Federal Acquisition Circular 2005-70 Summary of Rules  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAX POLICIES ANDIndustrial HygieneEnergyLead-acidPrimusContinued onCircular1256890

263

Diquark condensation effects on hot quark star configurations  

E-Print Network [OSTI]

The equation of state for quark matter is derived for a nonlocal, chiral quark model within the mean field approximation.We investigate the effects of a variation of the formfactors of the interaction on the phase diagram of quark matter. Special emphasis is on the occurrence of a diquark condensate which signals a phase transition to color superconductivity and its effects on the equation of state under the condition of beta- equilibrium and charge neutrality. We calculate the quark star configurations by solving the Tolman- Oppenheimer- Volkoff equations and obtain for the transition from a hot, normal quark matter core of a protoneutron star to a cool diquark condensed one a release of binding energy of the order of Delta M c^2 ~ 10^{53} erg. We find that this energy could not serve as an engine for explosive phenomena since the phase transition is not first order. Contrary to naive expectations the mass defect increases when for a given temperature we neglect the possibility of diquark condensation.

D. Blaschke; S. Fredriksson; H. Grigorian; A. M. "Oztas

2004-02-07T23:59:59.000Z

264

The magnetic configuration of a delta-spot  

E-Print Network [OSTI]

Sunspots, which harbor both magnetic polarities within one penumbra, are called delta-spots. They are often associated with flares. Nevertheless, there are only very few detailed observations of the spatially resolved magnetic field configuration. We present an investigation performed with the Tenerife Infrared Polarimeter at the Vacuum Tower Telescope in Tenerife. We observed a sunspot with a main umbra and several additional umbral cores, one of them with opposite magnetic polarity (the delta-umbra). The delta-spot is divided into two parts by a line along which central emissions of the spectral line Ca II 854.2 nm appear. The Evershed flow comming from the main umbra ends at this line. In deep photospheric layers, we find an almost vertical magnetic field for the delta-umbra, and the magnetic field decreases rapidly with height, faster than in the main umbra. The horizontal magnetic field in the direction connecting main and delta-umbra is rather smooth, but in one location next to a bright penumbral featu...

Balthasar, Horst; Louis, Rohan E; Verma, Meetu; Denker, Carsten

2013-01-01T23:59:59.000Z

265

Configurable Virtualized System Environments for High Performance Computing  

SciTech Connect (OSTI)

Existing challenges for current terascale high performance computing (HPC) systems are increasingly hampering the development and deployment efforts of system software and scientific applications for next-generation petascale systems. The expected rapid system upgrade interval toward petascale scientific computing demands an incremental strategy for the development and deployment of legacy and new large-scale scientific applications that avoids excessive porting. Furthermore, system software developers as well as scientific application developers require access to large-scale testbed environments in order to test individual solutions at scale. This paper proposes to address these issues at the system software level through the development of a virtualized system environment (VSE) for scientific computing. The proposed VSE approach enables ''plug-and-play'' supercomputing through desktop-to-cluster-to-petaflop computer system-level virtualization based on recent advances in hypervisor virtualization technologies. This paper describes the VSE system architecture in detail, discusses needed tools for VSE system management and configuration, and presents respective VSE use case scenarios.

Engelmann, Christian [ORNL; Scott, Stephen L [ORNL; Ong, Hong Hoe [ORNL; Vallee, Geoffroy R [ORNL; Naughton, III, Thomas J [ORNL

2007-01-01T23:59:59.000Z

266

Stationary Nonaxisymmetric Configurations of Magnetized Singular Isothermal Disks  

E-Print Network [OSTI]

Accepted.... Received...; in original form... We construct both aligned and unaligned (logarithmic spiral) stationary configurations of nonaxisymmetric magnetohydrodynamic (MHD) disks from either a full or a partial razor-thin power-law axisymmetric magnetized singular isothermal disk (MSID) that is embedded with a coplanar azimuthal magnetic field B? of a non-force-free radial scaling r?1/2 and that rotates differentially with a flat rotation curve of speed aD, where a is the isothermal sound speed and D is the dimensionless rotation parameter. Analytical solutions and stability criteria for determining D2 are derived. For aligned nonaxisymmetric MSIDs, eccentric m = 1 displacements may occur at arbitrary D2 in a full MSID but are allowed only with a2D2 = C2 A /2 in a partial MSID (CA is the Alfvén speed), while each case of |m | ? 1 gives two possible values of D2 for purely azimuthal propagations of fast and slow MHD density waves (FMDWs and SMDWs) that appear stationary in an inertial frame of reference. For disk galaxies modeled by a partial MSID resulting from a massive dark-matter halo with a flat rotation curve and a2D2 ? C2 A, stationary aligned perturbations of m = 1 are not allowed. For

Yu-qing Lou

2003-01-01T23:59:59.000Z

267

A new configurational bias scheme for sampling supramolecular structures  

E-Print Network [OSTI]

We present a new simulation scheme which allows an efficient sampling of reconfigurable supramolecular structures made of polymeric constructs functionalized by reactive binding sites. The algorithm is based on the configurational bias scheme of Siepmann and Frenkel and is powered by the possibility of changing the topology of the supramolecular network by a non-local Monte Carlo algorithm. Such plan is accomplished by a multi-scale modelling that merges coarse-grained simulations, describing the typical polymer conformations, with experimental results accounting for free energy terms involved in the reactions of the active sites. We test the new algorithm for a system of DNA coated colloids for which we compute the hybridisation free energy cost associated to the binding of tethered single stranded DNAs terminated by short sequences of complementary nucleotides. In order to demonstrate the versatility of our method, we also consider polymers functionalized by receptors that bind a surface decorated by ligands. In particular we compute the density of states of adsorbed polymers as a function of the number of ligand-receptor complexes formed. Such a quantity can be used to study the conformational properties of adsorbed polymers useful when engineering adsorption with tailored properties. We successfully compare the results with the predictions of a mean field theory. We believe that the proposed method will be a useful tool to investigate supramolecular structures resulting from direct interactions between functionalized polymers for which efficient numerical methodologies of investigation are still lacking.

Robin De Gernier; Tine Curk; Galina V. Dubacheva; Ralf P. Richter; Bortolo M. Mognetti

2014-12-09T23:59:59.000Z

268

Two-dimensional interpreter for field-reversed configurations  

SciTech Connect (OSTI)

An interpretive method is developed for extracting details of the fully two-dimensional (2D) “internal” structure of field-reversed configurations (FRC) from common diagnostics. The challenge is that only external and “gross” diagnostics are routinely available in FRC experiments. Inferring such critical quantities as the poloidal flux and the particle inventory has commonly relied on a theoretical construct based on a quasi-one-dimensional approximation. Such inferences sometimes differ markedly from the more accurate, fully 2D reconstructions of equilibria. An interpreter based on a fully 2D reconstruction is needed to enable realistic within-the-shot tracking of evolving equilibrium properties. Presented here is a flexible equilibrium reconstruction with which an extensive data base of equilibria was constructed. An automated interpreter then uses this data base as a look-up table to extract evolving properties. This tool is applied to data from the FRC facility at Tri Alpha Energy. It yields surprising results at several points, such as the inferences that the local ? (plasma pressure/external magnetic pressure) of the plasma climbs well above unity and the poloidal flux loss time is somewhat longer than previously thought, both of which arise from full two-dimensionality of FRCs.

Steinhauer, Loren, E-mail: lstein@uw.edu [Tri Alpha Energy, Rancho Santa Margarita, California 92688 (United States)

2014-08-15T23:59:59.000Z

269

Fusion proton diagnostic for the C-2 field reversed configuration  

SciTech Connect (OSTI)

Measurements of the flux of fusion products from high temperature plasmas provide valuable insights into the ion energy distribution, as the fusion reaction rate is a very sensitive function of ion energy. In C-2, where field reversed configuration plasmas are formed by the collision of two compact toroids and partially sustained by high power neutral beam injection [M. Binderbauer et al., Phys. Rev. Lett. 105, 045003 (2010); M. Tuszewski et al., Phys. Rev. Lett. 108, 255008 (2012)], measurements of DD fusion neutron flux are used to diagnose ion temperature and study fast ion confinement and dynamics. In this paper, we will describe the development of a new 3 MeV proton detector that will complement existing neutron detectors. The detector is a large area (50?cm{sup 2}), partially depleted, ion implanted silicon diode operated in a pulse counting regime. While the scintillator-based neutron detectors allow for high time resolution measurements (?100 kHz), they have no spatial or energy resolution. The proton detector will provide 10 cm spatial resolution, allowing us to determine if the axial distribution of fast ions is consistent with classical fast ion theory or whether anomalous scattering mechanisms are active. We will describe in detail the diagnostic design and present initial data from a neutral beam test chamber.

Magee, R. M., E-mail: rmagee@trialphaenergy.com; Clary, R.; Korepanov, S.; Smirnov, A.; Garate, E.; Knapp, K. [Tri Alpha Energy, Inc., Rancho Santa Margarita, California 92688 (United States); Tkachev, A. [Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)

2014-11-15T23:59:59.000Z

270

Shining New Light on Protein Structure and Function thru Synchrotron Radiation Circular Dichroism (SRCD) Spectroscopy  

SciTech Connect (OSTI)

Circular dichroism (CD) spectroscopy has been employed for more than 50 years for the study of the structure and dynamics of proteins. It is now a workhorse of structural biology, finding applications in the determination of protein secondary structures, monitoring and deciphering protein folding, examining macromolecular interactions, and defining and quantitating protein-ligand binding. For the most part, CD studies have used laboratory-based instruments to measure electronic transitions in the far (190-250 nm), near ultraviolet (UV) (250-300 nm) and visible (> 400 nm) wavelength ranges, which have enabled studies of polypeptide backbones, aromatic amino acids and colored chromophores, respectively. Additional transitions exist at lower wavelengths in the vacuum ultraviolet (VUV) region (<190 nm); however, these transitions tend to be inaccessible to conventional CD instruments, due to the low intensity of their Xenon arc lamp light sources at wavelengths below190 nm. In 1980, the first synchrotron-based CD instruments were constructed, which took advantage of the high photon flux available from synchrotron light sources at these wavelengths. However, the technique of synchrotron radiation circular dichroism (SRCD) did not really take off until enabling studies had been done to show that additional data were obtainable for proteins in the VUV region, that these data were readily accessible with modern beamlines, and most importantly, that new applications of these data existed in structural molecular biology.

Wallace,B.

2005-01-01T23:59:59.000Z

271

Low noise cryogenic electronics: preamplifier configurations with feedback on the bolometer  

E-Print Network [OSTI]

We have developed preamplifier configurations used to readout resistive bolometers such as those based on Neutron Transmuted Doped Germanium thermometers (so called NTD Ge thermometers)[1] or NbSi thin film thermometers [2, 3]. We introduce the impedance regulating preamplifier configuration. This configuration, is compared to previously proposed readout configurations with feedback on the bolometer [4]. It is shown that the impedance regulating preamplifier achieves Extreme Electrothermal Feedback without using transition edge thermometer and SQUID readout. Thus the detector and readout electronics are straightforwardly calibrated and can handle much larger event rates. Looped configurations simplify the design and improve performance of detection such as bandwidth. Finally, we analyse the impedance regulating amplifier noise contributions, with JFETs as front end device, relative to other configurations.

D. Yvon; V. Sushkov

1999-11-19T23:59:59.000Z

272

Dependence of effective internal field of congruent lithium niobate on its domain configuration and stability  

SciTech Connect (OSTI)

Congruent lithium niobate is characterized by its internal field, which arises due to defect clusters within the crystal. Here, it is shown experimentally that this internal field is a function of the molecular configuration in a particular domain and also on the stability of that particular configuration. The measurements of internal field are done using interferometric technique, while the variation of domain configuration is brought about by room temperature high voltage electric field poling.

Das, Ranjit, E-mail: ranjitdas.in@gmail.com, E-mail: souvik2cat@gmail.com, E-mail: srirajib@yahoo.com; Ghosh, Souvik, E-mail: ranjitdas.in@gmail.com, E-mail: souvik2cat@gmail.com, E-mail: srirajib@yahoo.com; Chakraborty, Rajib, E-mail: ranjitdas.in@gmail.com, E-mail: souvik2cat@gmail.com, E-mail: srirajib@yahoo.com [Department of Applied Optics and Photonics, University of Calcutta, JD-2, Sector III, Salt Lake, Kolkata 700098 (India)

2014-06-28T23:59:59.000Z

273

Optical fiber configurations for transmission of laser energy over great distances  

DOE Patents [OSTI]

There are provided optical fiber configurations that provide for the delivery of laser energy, and in particular, the transmission and delivery of high power laser energy over great distances. These configurations further are hardened to protect the optical fibers from the stresses and conditions of an intended application. The configurations provide means for determining the additional fiber length (AFL) need to obtain the benefits of such additional fiber, while avoiding bending losses.

Rinzler, Charles C; Zediker, Mark S

2013-10-29T23:59:59.000Z

274

Optical fiber configurations for transmission of laser energy over great distances  

DOE Patents [OSTI]

There are provided optical fiber configurations that provide for the delivery of laser energy, and in particular, the transmission and delivery of high power laser energy over great distances. These configurations further are hardened to protect the optical fibers from the stresses and conditions of an intended application. The configurations provide means for determining the additional fiber length (AFL) need to obtain the benefits of such additional fiber, while avoiding bending losses.

Rinzler, Charles C; Zediker, Mark S

2014-11-04T23:59:59.000Z

275

Comparative analysis of peat gasification reactor configuration. Final report  

SciTech Connect (OSTI)

This report summarizes the comparative analysis of two generic gasifiers (fluidized bed and entrained bed) and two specific hydrogasifiers (IGT's Peat-gas and Rockwell International's hydrogasifier). The objective is to establish a basis for recommending a peat gasification reactor configuration for testing in a DOE peat gasification pilot plant project. The approach involved the following four steps: data base evaluation, regression analysis, a chemical engineering evaluation of upstream and downstream equipment requirement, and computer simulation. Mathematical models and computer programs were developed to simulate the entrained-bed and fluidized-bed reactors. Parametric analyses were made, using these computer programs, to test the sensitivity and effects of significant operating variables (temperature, pressure and feed gas composition, for instance) on the product gas composition in the IGT gasifier and Rockwell International gasifier. This review and analysis concentrates primarily upon the Peatgas process of the Institute of Gas Technology and the Rockwell International Hydrogasification Process. The two-stage Peatgas process appears to have advantages in higher thermal efficiency, smaller capital investment, and its application of existing commercial operations and proven design practices from other types of fluidized solids processing units. There are two problems concerning operability of the Peatgas process: (1) the design of a fluidized solids unit for quite low standpipe densities (approximately 11 to 15 pounds per cubic foot), which may become even lower upon operating upsets, and (2) the potential problem of ash sintering in the very hot combustion zone of the steam-oxygen gasifier. On a relative time scale of development, the Peatgas would seem to be much closer to possible early commercialization than is the Rockwell system.

Not Available

1981-07-01T23:59:59.000Z

276

Vehicle Traffic Control Signal Heads— Light Emitting Diode Circular Signal Supplement (VTCSH-LED). This replaced the so-called Interim LED Purchase Specifications,  

E-Print Network [OSTI]

Engineers ’ (ITE) specification for light-emitting diode (LED) circular traffic signals recently was updated (June 27, 2005) and published under the name

S. Behura

277

E-Print Network 3.0 - achieving optimal configuration Sample...  

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

search results for: achieving optimal configuration Page: << < 1 2 3 4 5 > >> 1 Trafic engineering optimization methods to provide multiple IP services on a shared...

278

MAP, MAC, and Vortex-rings Configurations in the Weinberg-Salam Model  

E-Print Network [OSTI]

We report on the presence of new axially symmetric monopoles, antimonopoles and vortex-rings solutions of the SU(2)$\\times$U(1) Weinberg-Salam model of electromagnetic and weak interactions. When the $\\phi$-winding number $n=1$, and 2, the configurations are monopole-antimonopole pair (MAP) and monopole-antimonopole chain (MAC) with poles of alternating sign magnetic charge arranged along the $z$-axis. Vortex-rings start to appear from the MAP and MAC configurations when the winding number $n=3$. The MAP configurations possess zero net magnetic charge whereas the MAC configurations possess net magnetic charge of $4\\pi n/e$. In the MAP configurations, the monopole-antimonopole pair is bounded by the ${\\cal Z}^0$ field flux string and there is an electromagnetic current loop encircling it. The monopole and antimonopole possess magnetic charges $\\pm\\frac{2\\pi n}{e}$ respectively. In the MAC configurations there is no string connecting the monopole and the adjacent antimonopole and they possess magnetic charges $\\pm\\frac{4\\pi n}{e}$ respectively. The MAC configurations possess infinite total energy and zero magnetic dipole moment whereas the MAP configurations which are actually sphalerons possess finite total energy and magnetic dipole moment. The configurations were investigated for varying value of Higgs boson mass $0\\leq M_H^2\\leq 80$ at Weinberg angle $\\theta_W=\\frac{\\pi}{4}$.

Rosy Teh; Ban-Loong Ng; Khai-Ming Wong

2014-08-20T23:59:59.000Z

279

System Configuration Management Implementation Procedure for the Canister Storage Building (CSB)  

SciTech Connect (OSTI)

This document provides configuration management for the Distributed Control System (DCS), the Gaseous Effluent Monitoring System (GEMS-100) System, the Heating Ventilation and Air Conditioning (HVAC) Programmable Logic Controller (PLC), the Canister Receiving Crane (CRC) CRN-001 PLC, and both North and South vestibule door interlock system PLCs at the Canister Storage Building (CSB). This procedure identifies and defines software configuration items in the CSB control and monitoring systems, and defines configuration control throughout the system life cycle. Components of this control include: configuration status accounting; physical protection and control; and verification of the completeness and correctness of these items.

GARRISON, R.C.

2000-11-28T23:59:59.000Z

280

1D-8 Duo-Binary Circular Turbo Decoder Based on Border Metric Encoding for WiMAX  

E-Print Network [OSTI]

Abstract- This paper presents a duo-binary circular turbo decoder based on border metric encoding. With the proposed method, the memory size for branch memory is reduced by half and the dummy calculation is removed at the cost of the small-sized memory which holds the encoded border metrics. Based on the proposed SISO decoder and the dedicated hardware interleaver, a duo-binary circular turbo decoder is designed for the WiMAX standard using a 0.13 ?m CMOS process, which can support 24.26 Mbps at 200MHz. I.

Ji-hoon Kim; In-cheol Park

Note: This page contains sample records for the topic "in-plane circular configuration" 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

OPTIMAL CONFIGURATION OF A COMMAND AND CONTROL NETWORK: BALANCING PERFORMANCE AND RECONFIGURATION CONSTRAINTS  

SciTech Connect (OSTI)

The optimization of the configuration of communications and control networks is important for assuring the reliability and performance of the networks. This paper presents techniques for determining the optimal configuration for such a network in the presence of communication and connectivity constraints. reconfiguration to restore connectivity to a data-fusion network following the failure of a network component.

L. DOWELL

1999-08-01T23:59:59.000Z

282

Force Free Configurations of Vortices in High Temperature Superconductors near H_{c2}  

E-Print Network [OSTI]

We study force-free configurations of Abrikosov flux lines in the line-liquid and line-crystal limit, near the melting transition at H_m. We show that the condition for zero force configurations can be solved by appealing to the structure of chiral liquid crystalline phases.

Randall D. Kamien

1998-04-27T23:59:59.000Z

283

Spheromak merging and field reversed configuration formation at the Swarthmore Spheromak Experimenta...  

E-Print Network [OSTI]

Spheromak merging and field reversed configuration formation at the Swarthmore Spheromak- and counter-helicity spheromak merging studies at the Swarthmore Spheromak Experiment SSX M. R. Brown, Phys configuration FRC formation and stability by counter-helicity spheromak merging. A pair of midplane coils

Brown, Michael R.

284

Introducing Automated Environment Configuration Testing in an Industrial Setting Caryna Pinheiro  

E-Print Network [OSTI]

Introducing Automated Environment Configuration Testing in an Industrial Setting Caryna Pinheiro environment configuration testing strategy developed as part of an action research project to deal with issues of staging environment instability in a large organization. We demonstrate how a suite of automated

Sillito, Jonathan

285

A Safety Case Approach to Assuring Configurable Architectures of Safety-Critical Product Lines  

E-Print Network [OSTI]

A Safety Case Approach to Assuring Configurable Architectures of Safety-Critical Product Lines to the development of safety-critical systems. A product line offers large-scale reuse by exploiting common features the safety of architectural configurations and variation when developing product-line safety cases. We

Kelly, Tim

286

Design Optimization of MultiElement Aerodynamic Configurations Using a Viscous  

E-Print Network [OSTI]

Design Optimization of Multi­Element Aerodynamic Configurations Using a Viscous Adjoint Method.S.A An adjoint-based Navier-Stokes design and optimization method for multi-element aerodynamic configurations effects. Using a viscous continuous adjoint formulation, the necessary aerodynamic gradient information

Kim, Sangho

287

Exploiting the Impact of Database System Configuration Parameters: A Design of Experiments Approach  

E-Print Network [OSTI]

in determining DBMS performance. However, the number of configuration parameters in a DBMS is very large may have no or marginal effects on the DBMS performance for the given query workload. Database of input parameters. Second, we exploit the estimated effects to: 1) rank DBMS configuration parameters

Minnesota, University of

288

Configure Microsoft Outlook 2011 for Mac HMS Help Desk: (617) 432-2000  

E-Print Network [OSTI]

Configure Microsoft Outlook 2011 for Mac HMS Help Desk: (617) 432 2011 for Mac HMS Help Desk: (617) 432-2000 2 · Create a new;Configure Microsoft Outlook 2011 for Mac HMS Help Desk: (617) 432-2000 3

Blackwell, Keith

289

OPTIMAL CONFIGURATION OF A COMMAND AND CONTROL NETWORK: BALANCING PERFORMANCE AND RECONFIGURATION CONSTRAINTS  

SciTech Connect (OSTI)

The optimization of the configuration of communications and control networks is important for assuring the reliability and performance of the networks. This paper presents techniques for determining the optimal configuration for such a network in the presence of communication and connectivity constraints.

L. DOWELL

1999-07-01T23:59:59.000Z

290

Methodologies for PVC Configuration in Heterogeneous ATM Environments Using Intelligent Mobile Agents  

E-Print Network [OSTI]

Methodologies for PVC Configuration in Heterogeneous ATM Environments Using Intelligent Mobile; Methodologies for PVC Configuration in Heterogeneous ATM Environments Using Intelligent Mobile Agents John Boyer by individual ATM switch vendors has created an environment where there is no uniform method for PVC

White, Tony

291

Optimizing a physical security configuration using a highly detailed simulation model  

E-Print Network [OSTI]

Optimizing a physical security configuration using a highly detailed simulation model Marechal, T. Email: tommarechal@hotmail.com Abstract This chapter focuses on using a highly detailed simulation model. In this chapter describes the use of a highly detailed simulation model to find a superior security configuration

Smith, Alice E.

292

Possible creation of net circular polarization and not only depolarization of spectral lines by isotropic collisions  

E-Print Network [OSTI]

We will show that isotropic collisions of electrons and protons with neutral hydrogen can lead to creation of net orientation of the atomic levels in the presence of a magnetic field. Consequently, the emitted Stokes-V profile of the spectral lines can be almost symmetric in contrast to the typical antisymmetric signature of the Zeeman effect. Moreover, the amplitude of the symmetric lobe can be significantly higher than the amplitude of the antisymmetric components. This mechanism is caused by a $\\pm{M}$ symmetry breaking of the collisional transitions between different Zeeman sublevels. We will show an example of our first results for the H$\\alpha$ line. This new mechanism could perhaps explain the net circular polarization of spectral lines observed in some solar limb observations and which are currently not understood. However, our results are very preliminary and more developments are needed for going further on.

Jiri Stepan; Sylvie Sahal-Brechot

2008-11-27T23:59:59.000Z

293

Exact Solutions for a Rotational Flow of Generalized Second Grade Fluids Through a Circular Cylinder  

E-Print Network [OSTI]

In this note the velocity field and the associated tangential stress corresponding to the rotational flows of a generalized second grade fluid within an infinite circular cylinder are determined by means of the Laplace and Hankel transforms. At time t=0 the fluid is at rest and the motion is produced by the rotation of the cylinder, around its axis, with the angular velocity $\\Omega.t$. The velocity field and the adequate shear stress are presented under integral and series forms in terms of the generalized G-functions. Furthermore, they are presented as a sum between the Newtonian solutions and the adequate non-Newtonian contributions. The corresponding solutions for the ordinary second grade fluid and Newtonian fluid are obtained as particular cases of our solutions for $\\beta = 1$, respectively $\\alpha = 0$ and $\\beta = 1$.

Amir Mahmood; Saifullah; Qammar Rubab

2008-02-26T23:59:59.000Z

294

Analytical solutions for the flow of Carreau and Cross fluids in circular pipes and thin slits  

E-Print Network [OSTI]

In this paper, analytical expressions correlating the volumetric flow rate to the pressure drop are derived for the flow of Carreau and Cross fluids through straight rigid circular uniform pipes and long thin slits. The derivation is based on the application of Weissenberg-Rabinowitsch-Mooney-Schofield method to obtain flow solutions for generalized Newtonian fluids through pipes and our adaptation of this method to the flow through slits. The derived expressions are validated by comparing their solutions to the solutions obtained from direct numerical integration. They are also validated by comparison to the solutions obtained from the variational method which we proposed previously. In all the investigated cases, the three methods agree very well. The agreement with the variational method also lends more support to this method and to the variational principle which the method is based upon.

Sochi, Taha

2015-01-01T23:59:59.000Z

295

Anomalous shell effect in the transition from a circular to a triangular billiard  

E-Print Network [OSTI]

We apply periodic orbit theory to a two-dimensional non-integrable billiard system whose boundary is varied smoothly from a circular to an equilateral triangular shape. Although the classical dynamics becomes chaotic with increasing triangular deformation, it exhibits an astonishingly pronounced shell effect on its way through the shape transition. A semiclassical analysis reveals that this shell effect emerges from a codimension-two bifurcation of the triangular periodic orbit. Gutzwiller's semiclassical trace formula, using a global uniform approximation for the bifurcation of the triangular orbit and including the contributions of the other isolated orbits, describes very well the coarse-grained quantum-mechanical level density of this system. We also discuss the role of discrete symmetry for the large shell effect obtained here.

Ken-ichiro Arita; Matthias Brack

2008-04-25T23:59:59.000Z

296

Computational study of subcritical response in flow past a circular cylinder  

E-Print Network [OSTI]

Flow past a circular cylinder is investigated in the subcritical regime, below the onset of Benard-von Karman vortex shedding at Re_c ~ 47. The transient response of infinitesimal perturbations is computed. The domain requirements for obtaining converged results is discussed at length. It is shown that energy amplification occurs as low as Re=2.2. Throughout much of the subcritical regime the maximum energy amplification increases approximately exponentially in the square of Re reaching 6800 at Re_c$. The spatiotemporal structure of the optimal transient dynamics is shown to be transitory Benard-von Karman vortex streets. At Re ~ 42 the long-time structure switches from exponentially increasing downstream to exponentially decaying downstream. Three-dimensional computations show that two-dimensional structures dominate the energy growth except at short times.

Cantwell, Christopher D; 10.1103/PhysRevE.82.026315

2013-01-01T23:59:59.000Z

297

A MODEL FOR THERMAL PHASE VARIATIONS OF CIRCULAR AND ECCENTRIC EXOPLANETS  

SciTech Connect (OSTI)

We present a semi-analytic model atmosphere for close-in exoplanets that captures the essential physics of phase curves: orbital and viewing geometry, advection, and re-radiation. We calibrate the model with the well-characterized transiting planet, HD 189733b, then compute light curves for seven of the most eccentric transiting planets: Gl 436b, HAT-P-2b, HAT-P-11b, HD 17156b, HD 80606b, WASP-17b, and XO-3b. We present phase variations for a variety of different radiative times and wind speeds. In the limit of instant re-radiation, the light-curve morphology is entirely dictated by the planet's eccentricity and argument of pericenter: the light curve maximum leads or trails the eclipse depending on whether the planet is receding from or approaching the star at superior conjunction, respectively. For a planet with non-zero radiative timescales, the phase peak occurs early for super-rotating winds, and late for sub-rotating winds. We find that for a circular orbit, the timing of the phase variation maximum with respect to superior conjunction indicates the direction of the dominant winds, but cannot break the degeneracy between wind speed and radiative time. For circular planets the phase minimum occurs half an orbit away from the phase maximum-despite the fact that the coolest longitudes are always near the dawn terminator-and therefore does not convey any additional information. In general, increasing the advective frequency or the radiative time has the effect of reducing the peak-to-trough amplitude of phase variations, but there are interesting exceptions to these trends. Lastly, eccentric planets with orbital periods significantly longer than their radiative time exhibit 'ringing', whereby the hot spot generated at periastron rotates in and out of view. The existence of ringing makes it possible to directly measure the wind speed (the frequency of the ringing) and the radiative time constant (the damping of the ringing).

Cowan, Nicolas B. [Northwestern University, Dearborn Observatory, 2131 Tech Drive, Evanston, IL 60208 (United States); Agol, Eric, E-mail: n-cowan@northwestern.edu [Astronomy Department, University of Washington, Box 351580, Seattle, WA 98195 (United States)

2011-01-10T23:59:59.000Z

298

hal-00090531,version4-6Jul2007 Yield drag in a two-dimensional foam flow around a circular obstacle  

E-Print Network [OSTI]

hal-00090531,version4-6Jul2007 Yield drag in a two-dimensional foam flow around a circular obstacle-dimensional flow of foams around a circular obstacle within a long channel. In experiments, we confine the foam between liquid and glass surfaces. In simulations, we use a deterministic software, the Surface Evolver

Boyer, Edmond

299

PROPELLER-EPI With Parallel Imaging Using a Circularly Symmetric Phased-Array RF Coil at 3.0 T  

E-Print Network [OSTI]

to EPI's relatively slow sam- pling rate along the phase-encoding direction, diffusion images generallyPROPELLER-EPI With Parallel Imaging Using a Circularly Symmetric Phased-Array RF Coil at 3.0 T: Application to High-Resolution Diffusion Tensor Imaging Tzu-Chao Chuang,1 Teng-Yi Huang,2 Fa-Hsuan Lin,3 Fu

300

The Hamiltonian structure of a two-dimensional rigid circular cylinder interacting dynamically with N point vortices  

E-Print Network [OSTI]

The Hamiltonian structure of a two-dimensional rigid circular cylinder interacting dynamically bracket for the dynamics of N point vortices in an unbounded plane. We then use this Hamiltonian structure, New Mexico State University, Las Cruces, New Mexico 88003 Jerrold E. Marsdenb) Control and Dynamical

Shashikanth, Banavara N.

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Computational study of subcritical response in flow past a circular cylinder C. D. Cantwell* and D. Barkley  

E-Print Network [OSTI]

Computational study of subcritical response in flow past a circular cylinder C. D. Cantwell* and D is investigated in the subcritical regime, below the onset of Bénard-von Kármán vortex shedding at Reynolds number as Re=2.2. Throughout much of the subcritical regime the maximum energy amplification increases

Barkley, Dwight

302

Spectroscopy and intruder configurations of $^{33}$Mg and $^{31}$Ne studied with antisymmetrized molecular dynamics  

E-Print Network [OSTI]

Excitation spectra and neutron single particle configurations of $^{33}$Mg and $^{31}$Ne are investigated by using antisymmetrized molecular dynamics combined with generator coordinate method. It is shown that both nuclei have strongly deformed $3/2^-$ ground state with a $3p2h$ configuration. The excitation spectra are qualitatively understood in terms of the Nilsson model and the calculation has shown the coexistence of different intruder configurations within small excitation energy. The calculated one neutron separation energy of $^{31}$Ne is rather small ($S_n=250$ keV) and implies a p-wave one neutron halo with a strongly deformed core.

M. Kimura

2011-05-17T23:59:59.000Z

303

Theory versus experimental results and comparisons for five orifice-compensated hybrid bearing configurations  

E-Print Network [OSTI]

). . . . . . 16 Static Loader (Kurtin, et al. , 1991). . . . . . . . . . . . . 17 Dynamic Excitation (Childs, Hale, and Rouvas, 1991). . . . . 18 Hydrostatic Bearing (Rowe, 1983) Pressure Distribution for an Orifice-Compensated Circular Hydrostatic Pad (Rowe... hydrostatic bearing, shown in Fig. 12, is an externally pressurized journal bearing which employs compensation (i. e. , flow restriction) devices to pro- vide both stability and load support for the journal. This compensation is accomplished by injecting a...

Franchek, Nancy Marie

1992-01-01T23:59:59.000Z

304

Low cost fuel cell diffusion layer configured for optimized anode water management  

DOE Patents [OSTI]

A fuel cell comprises a cathode gas diffusion layer, a cathode catalyst layer, an anode gas diffusion layer, an anode catalyst layer and an electrolyte. The diffusion resistance of the anode gas diffusion layer when operated with anode fuel is higher than the diffusion resistance of the cathode gas diffusion layer. The anode gas diffusion layer may comprise filler particles having in-plane platelet geometries and be made of lower cost materials and manufacturing processes than currently available commercial carbon fiber substrates. The diffusion resistance difference between the anode gas diffusion layer and the cathode gas diffusion layer may allow for passive water balance control.

Owejan, Jon P; Nicotera, Paul D; Mench, Matthew M; Evans, Robert E

2013-08-27T23:59:59.000Z

305

VOLUME 89, NUMBER 1 P H Y S I C A L R E V I E W L E T T E R S 1 JULY 2002 Multiple Filamentation of Circularly Polarized Beams  

E-Print Network [OSTI]

of Circularly Polarized Beams G. Fibich and B. Ilan Department of Applied Mathematics, Tel Aviv University, Tel of equations that describes the propagation of circularly polarized laser beams in a Kerr medium. Analysis and simulations of this system show that multiple filamentation is suppressed for circularly polarized beams. DOI

Fibich, Gadi

306

Venture Capitalists' Decision to Withdraw: The Role of Portfolio Configuration From a Real Options Lens  

E-Print Network [OSTI]

When does a venture capital firm withdraw from an investment project prior to its completion? This study offers a real options view on this decision by examining the contingent effects of portfolio configuration. We explore how project withdrawal...

Li, Yong; Chi, Tailan

2012-01-01T23:59:59.000Z

307

p-CdTe/n-CdS photovoltaic cells in the substrate configuration.  

E-Print Network [OSTI]

??In this thesis, p-CdTe/n-CdS solar cells in the substrate configuration have been studied. The focus is on device fabrication, performance optimization, and the development of… (more)

Wu, Hsiang Ning (1984 - )

2014-01-01T23:59:59.000Z

308

Computations of temperature profiles in spheromak configurations with open field lines Carl Sovinec  

E-Print Network [OSTI]

Computations of temperature profiles in spheromak configurations with open field lines Carl Sovinec 10/27/00 The NIMROD zero- spheromak simulation results have mostly open field lines for parameters

Sovinec, Carl

309

CogPiT ---Configuration of Protocols in TIP Burkhard Stiller \\Lambda  

E-Print Network [OSTI]

CogPiT --- Configuration of Protocols in TIP Burkhard Stiller \\Lambda University of Cambridge 334476, FAX: +44 +1223 334678 E­Mail: Burkhard.Stiller@cl.cam.ac.uk Abstract The variety of upcoming

Haddadi, Hamed

310

Highly configurable platforms for embedded computing systems Frank Vahida,*, Roman Lyseckya  

E-Print Network [OSTI]

Highly configurable platforms for embedded computing systems Frank Vahida,*, Roman Lyseckya 92521, USA Abstract Platform chips, which are pre-designed chips possessing numerous processors energy; Cache; Hardware/software partitioning; Architecture tuning 1. Introduction Integrated circuit (IC

Vahid, Frank

311

UNIVERSITY OF CALIFORNIA, SAN DIEGO Configurable Energy-efficient Co-processors to Scale the  

E-Print Network [OSTI]

UNIVERSITY OF CALIFORNIA, SAN DIEGO Configurable Energy-efficient Co-processors to Scale . . . . . . . . . . . . . . . . 18 Chapter 3 Patchable Conservation Cores: Energy-efficient circuits with processor-like lifetimes

312

Order Module--DOE-STD-1073-2003, CONFIGURATION MANAGEMENT | Department...  

Office of Environmental Management (EM)

Order Module--DOE-STD-1073-2003, CONFIGURATION MANAGEMENT "The familiar level of this module is divided into three sections. The first section covers chapters 1 through 3. The...

313

Design of a cluster analysis heuristic for the configuration and capacity management of manufacturing cells  

E-Print Network [OSTI]

This dissertation presents the configuration and capacity management of manufacturing cells using cluster analysis. A heuristic based on cluster analysis is developed to solve cell formation in cellular manufacturing systems (CMS). The clustering...

Shim, Young Hak

2007-09-17T23:59:59.000Z

314

A co-axially configured submillimeter spectrometer and investigations of hydrogen bound molecular complexes  

E-Print Network [OSTI]

The development of a co-axially configured submillimeter spectrometer is reported. The spectrometer has been constructed to observe molecular complexes that exhibit non-covalent interactions with energies much less than that of a traditional...

McElmurry, Blake Anthony

2009-05-15T23:59:59.000Z

315

A configuration and analysis for damping oscillations in flexible robotic arms using passive elements  

E-Print Network [OSTI]

A hardware configuration that reduces excessive oscillation in flexible robotic arms is presented and analyzed. An experimental apparatus was constructed and proved to effectively damp unwanted oscillations using passive components. Equations...

Compere, Marc Damon

1996-01-01T23:59:59.000Z

316

DISCRETIZED CONFIGURATIONS AND PARTIAL AARON ABRAMS, DAVID GAY, AND VALERIE HOWER  

E-Print Network [OSTI]

DISCRETIZED CONFIGURATIONS AND PARTIAL PARTITIONS AARON ABRAMS, DAVID GAY, AND VALERIE HOWER to have the homotopy type of a wedge of spheres [2]. 1 #12;2 AARON ABRAMS, DAVID GAY, AND VALERIE HOWER

Abrams, Aaron

317

Saltwell PIC Skid Programmable Logic Controller (PLC) Software Configuration Management Plan  

SciTech Connect (OSTI)

This document provides the procedures and guidelines necessary for computer software configuration management activities during the operation and maintenance phases of the Saltwell PIC Skids as required by LMH-PRO-309, Rev. 0, Computer Software Quality Assurance, Section 2.6, Software Configuration Management. The software configuration management plan (SCMP) integrates technical and administrative controls to establish and maintain technical consistency among requirements, physical configuration, and documentation for the Saltwell PIC Skid Programmable Logic Controller (PLC) software during the Hanford application, operations and maintenance. This SCMP establishes the Saltwell PIC Skid PLC Software Baseline, status changes to that baseline, and ensures that software meets design and operational requirements and is tested in accordance with their design basis.

KOCH, M.R.

1999-11-16T23:59:59.000Z

318

Saltwell Leak Detector Station Programmable Logic Controller (PLC) Software Configuration Management Plan (SCMP)  

SciTech Connect (OSTI)

This document provides the procedures and guidelines necessary for computer software configuration management activities during the operation and maintenance phases of the Saltwell Leak Detector Stations as required by HNF-PRO-309, Rev. 1, Computer Software Quality Assurance, Section 2.4, Software Configuration Management. The software configuration management plan (SCMP) integrates technical and administrative controls to establish and maintain technical consistency among requirements, physical configuration, and documentation for the Saltwell Leak Detector Station Programmable Logic Controller (PLC) software during the Hanford application, operations and maintenance. This SCMP establishes the Saltwell Leak Detector Station PLC Software Baseline, status changes to that baseline, and ensures that software meets design and operational requirements and is tested in accordance with their design basis.

WHITE, K.A.

2000-11-28T23:59:59.000Z

319

Beyond the Rainbow: Self-Adaptive Failure Avoidance in Configurable Systems  

E-Print Network [OSTI]

Beyond the Rainbow: Self-Adaptive Failure Avoidance in Configurable Systems Jacob Swanson, Myra B and that copies bear this notice and the full citation on the first page. To copy otherwise, to republish, to post

Cohen, Myra

320

Atomistic characterization of stress-driven configurational instability and its activation mechanisms  

E-Print Network [OSTI]

Cleavage decohesion and shear dislocation nucleation are two basic modes of localized deformation in crystal lattices, which normally result from instability of the atomic configuration driven by mechanical forces. The ...

Zhu, Ting, 1971-

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Kinematic analysis of pre-grasp configurations for generalized dexterous hands  

E-Print Network [OSTI]

KINEMATIC ANALYSIS OF PRE-GRASP CONFIGURATIONS FOR GENERALIZED DEXTEROUS HANDS A Thesis by VICTOR HUGO PINTO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements lor the degree... of MASTER OF SCIENCE December 1990 Major Subject: Mechanical Engineering KINEMATIC ANALYSIS OF PRE-GRASP CONFIGURATIONS FOR GENERALIZED DEXTEROUS HANDS A Thesis by VICTOR HUGO PINTO Approved as to style and content by: M. Driels (Chair of Committee...

Pinto, Victor Hugo

1990-01-01T23:59:59.000Z

322

Constitutive model effects on finite element modeling of elastomer behavior in radial interference seal configurations  

E-Print Network [OSTI]

CONSTITUTIVE MODEL EFFECTS ON FINITE ELEMENT MODELING OF ELASTOMER BEHAVIOR IN RADIAL INTERFERENCE SEAL CONFIGURATIONS A Thesis by JASON R. JACKSON Subnutted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 1996 Major Subject: Mechanical Engineering CONSTITUTIVE MODEL EFFECTS ON FINITE ELEMENT MODELING OF ELASTOMER BEHAVIOR IN RADIAL INTERFERENCE SEAL CONFIGURATIONS A Thesis by JASON R. JACKSON...

Jackson, Jason R.

1996-01-01T23:59:59.000Z

323

Performance monitoring for new phase dynamic optimization of instruction dispatch cluster configuration  

DOE Patents [OSTI]

In a processor having multiple clusters which operate in parallel, the number of clusters in use can be varied dynamically. At the start of each program phase, the configuration option for an interval is run to determine the optimal configuration, which is used until the next phase change is detected. The optimum instruction interval is determined by starting with a minimum interval and doubling it until a low stability factor is reached.

Balasubramonian, Rajeev (Sandy, UT); Dwarkadas, Sandhya (Rochester, NY); Albonesi, David (Ithaca, NY)

2012-01-24T23:59:59.000Z

324

Disposal configuration options for future uses of greater confinement disposal at the Nevada Test Site  

SciTech Connect (OSTI)

The US Department of Energy (DOE) is responsible for disposing of a variety of radioactive and mixed wastes, some of which are considered special-case waste because they do not currently have a clear disposal option. The DOE`s Nevada Field Office contracted with Sandia National Laboratories to investigate the possibility of disposing of some of this special-case waste at the Nevada Test Site (NTS). As part of this investigation, a review of a near-surface and subsurface disposal options that was performed to develop alternative disposal configurations for special-case waste disposal at the NTS. The criteria for the review included (1) configurations appropriate for disposal at the NTS; (2) configurations for disposal of waste at least 100 ft below the ground surface; (3) configurations for which equipment and technology currently exist; and (4) configurations that meet the special requirements imposed by the nature of special-case waste. Four options for subsurface disposal of special-case waste are proposed: mined consolidated rock, mined alluvium, deep pits or trenches, and deep boreholes. Six different methods for near-surface disposal are also presented: earth-covered tumuli, above-grade concrete structures, trenches, below-grade concrete structures, shallow boreholes, and hydrofracture. Greater confinement disposal (GCD) in boreholes at least 100 ft deep, similar to that currently practiced at the GCD facility at the Area 5 Radioactive Waste Management Site at the NTS, was retained as the option that met the criteria for the review. Four borehole disposal configurations are proposed with engineered barriers that range from the native alluvium to a combination of gravel and concrete. The configurations identified will be used for system analysis that will be performed to determine the disposal configurations and wastes that may be suitable candidates for disposal of special-case wastes at the NTS.

Price, L. [Science Applications International Corp., Albuquerque, NM (United States)

1994-09-01T23:59:59.000Z

325

Evaluation of tire pressure, tire construction, axle configuration, and axle load on flexible pavement performance  

E-Print Network [OSTI]

EVALUATION OF TIRE PRESSURE, TIRE CONSTRUCTION, AXLE CONFIGURATION, AND AXLE LOAD ON FLEXIBLE PAVEMENT PERFORMANCE A Thesis by AHMAD NAJEEB JAMY Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 1991 Major Subject: Civil Engineering EVALUATION OF TIRE PRESSURE, TIRE CONSTRUCTION, AXLE CONFIGURATION, AND AXLE LOAD ON FLEXIBLE PAVEMENT PERFORMANCE. A Thesis by AHMAD NAJEEB JAMY Approved...

Jamy, Ahmad Najeeb

1991-01-01T23:59:59.000Z

326

A multi-reactor configuration for multi-megawatt spacecraft power supplies  

E-Print Network [OSTI]

capacity may be required for round trip missions. Mission analyses were carried out for an unmanned Mars Cargo Mission and compared with both single reactor and conventional chemical rocket concepts. Interplanetary trajectories utilizing throttled... ABSTRACT ACKNOWLEDGEMENT TABLE OF CONTENTS LIST OF FIGURES LIST OF TABLES CHAPTER I. INTRODUCTION II. MULTI-REACTOR CONFIGURATIONS III. THE HYDRA MULTI-REACTOR CONFIGURATION IV. HYDRA SYSTEM ANALYSIS V, MARS CARGO MISSION ANALYSIS VI, CONCLUSIONS...

George, Jeffrey Alan

1989-01-01T23:59:59.000Z

327

Two-dimensional flows of foam: drag exerted on circular obstacles and dissipation  

E-Print Network [OSTI]

A Stokes experiment for foams is proposed. It consists in a two-dimensional flow of a foam, confined between a water subphase and a top plate, around a fixed circular obstacle. We present systematic measurements of the drag exerted by the flowing foam on the obstacle, \\emph{versus} various separately controlled parameters: flow rate, bubble volume, solution viscosity, obstacle size and boundary conditions. We separate the drag into two contributions, an elastic one (yield drag) at vanishing flow rate, and a fluid one (viscous coefficient) increasing with flow rate. We quantify the influence of each control parameter on the drag. The results exhibit in particular a power-law dependence of the drag as a function of the solution viscosity and the flow rate with two different exponents. Moreover, we show that the drag decreases with bubble size, increases with obstacle size, and that the effect of boundary conditions is small. Measurements of the streamwise pressure gradient, associated to the dissipation along the flow of foam, are also presented: they show no dependence on the presence of an obstacle, and pressure gradient depends on flow rate, bubble volume and solution viscosity with three independent power laws.

Benjamin Dollet; Florence Elias; Catherine Quilliet; Arnaud Huillier; Miguel Aubouy; Francois Graner

2004-11-22T23:59:59.000Z

328

The Fine-Structure of the Net-Circular Polarization in a Sunspot Penumbra  

E-Print Network [OSTI]

We present novel evidence for a fine structure observed in the net-circular polarization (NCP) of a sunspot penumbra based on spectropolarimetric measurements utilizing the Zeeman sensitive FeI 630.2 nm line. For the first time we detect a filamentary organized fine structure of the NCP on spatial scales that are similar to the inhomogeneities found in the penumbral flow field. We also observe an additional property of the visible NCP, a zero-crossing of the NCP in the outer parts of the center-side penumbra, which has not been recognized before. In order to interprete the observations we solve the radiative transfer equations for polarized light in a model penumbra with embedded magnetic flux tubes. We demonstrate that the observed zero-crossing of the NCP can be explained by an increased magnetic field strength inside magnetic flux tubes in the outer penumbra combined with a decreased magnetic field strength in the background field. Our results strongly support the concept of the uncombed penumbra.

A. Tritschler; D. A. N. Mueller; R. Schlichenmaier; H. J. Hagenaar

2007-10-24T23:59:59.000Z

329

Circularly polarized few-optical-cycle solitons in the short-wave-approximation regime  

SciTech Connect (OSTI)

We consider the propagation of few-cycle pulses (FCPs) beyond the slowly varying envelope approximation in media in which the dynamics of constituent atoms is described by a two-level Hamiltonian by taking into account the wave polarization. We consider the short-wave approximation, assuming that the resonance frequency of the two-level atoms is well below the inverse of the characteristic duration of the optical pulse. By using the reductive perturbation method (multiscale analysis), we derive from the Maxwell-Bloch-Heisenberg equations the governing evolution equations for the two polarization components of the electric field in the first order of the perturbation approach. We show that propagation of circularly polarized (CP) few-optical-cycle solitons is described by a system of coupled nonlinear equations, which reduces in the scalar case to the standard sine Gordon equation describing the dynamics of linearly polarized FCPs in the short-wave-approximation regime. By direct numerical simulations, we calculate the lifetime of CP FCPs, and we study the transition to two orthogonally polarized single-humped pulses as a generic route of their instability.

Leblond, Herve [Laboratoire de Photonique d'Angers, EA 4464, Universite d'Angers, 2 Boulevard Lavoisier, F-49045 Angers Cedex 01 (France); Triki, Houria [Radiation Physics Laboratory, Department of Physics, Faculty of Sciences, Badji Mokhtar University, Post Office Box 12, 23000 Annaba (Algeria); Mihalache, Dumitru [Laboratoire de Photonique d'Angers, EA 4464, Universite d'Angers, 2 Boulevard Lavoisier, F-49045 Angers Cedex 01 (France); Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH), 407 Atomistilor, RO-077125 Magurele-Bucharest (Romania); Academy of Romanian Scientists, 54 Splaiul Independentei, RO-050094 Bucharest (Romania)

2011-08-15T23:59:59.000Z

330

Cylindrical acoustic levitator/concentrator having non-circular cross-section  

DOE Patents [OSTI]

A low-power, inexpensive acoustic apparatus for levitation and/or concentration of aerosols and small liquid/solid samples having particulates up to several millimeters in diameter in air or other fluids is described. It is constructed from a commercially available, hollow piezoelectric crystal which has been formed with a cylindrical cross-section to tune the resonance frequency of the breathing mode resonance of the crystal to that of the interior cavity of the cylinder. When the resonance frequency of the interior cylindrical cavity is matched to the breathing mode resonance of the cylindrical piezoelectric transducer, the acoustic efficiency for establishing a standing wave pattern in the cavity is high. By deforming the circular cross-section of the transducer, the acoustic force is concentrated along axial regions parallel to the axis of the transducer. The cylinder does not require accurate alignment of a resonant cavity. The concentrated regions of acoustic force cause particles in the fluid to concentrate within the regions of acoustic force for separation from the fluid.

Kaduchak, Gregory; Sinha, Dipen N.

2003-11-11T23:59:59.000Z

331

Configuration-dependent electronic and magnetic properties of graphene monolayers and nanoribbons functionalized with aryl groups  

SciTech Connect (OSTI)

Graphene monolayers functionalized with aryl groups exhibit configuration-dependent electronic and magnetic properties. The aryl groups were adsorbed in pairs of neighboring atoms in the same sublattice A (different sublattices) of graphene monolayers, denoted as the M{sub 2}{sup AA} (M{sub 2}{sup AB}) configuration. The M{sub 2}{sup AA} configuration behaved as a ferromagnetic semiconductor. The band gaps for the majority and minority bands were 1.1 eV and 1.2 eV, respectively. The M{sub 2}{sup AB} configuration behaved as a nonmagnetic semiconductor with a band gap of 0.8 eV. Each aryl group could induce 1 Bohr magneton (?{sub B}) into the molecule-graphene system. Armchair graphene nanoribbons (GNRs) exhibited the same configuration-dependent magnetic properties as the graphene monolayers. The net spin of the functionalized zigzag GNRs was mainly localized on the edges demonstrating an adsorption site-dependent magnetism. For the zigzag GNRs, both the M{sub 2}{sup AA} and M{sub 2}{sup AB} configurations possibly had a magnetic moment. Each aryl group could induce 1.5–3.5 ?{sub B} into the molecule-graphene system. There was a metal-to-insulator transition after adsorption of the aryl groups for the zigzag GNRs.

Tian, Xiaoqing, E-mail: xqtian2008@gmail.com; Gu, Juan [College of Physics and Technology, Shenzhen University, Shenzhen 518060, Guangdong (China)] [College of Physics and Technology, Shenzhen University, Shenzhen 518060, Guangdong (China); Xu, Jian-bin, E-mail: jbxu@ee.cuhk.edu.hk [Department of Electronic Engineering and Materials Science and Technology Research Center, The Chinese University of Hong Kong, Shatin, New Territories (Hong Kong)] [Department of Electronic Engineering and Materials Science and Technology Research Center, The Chinese University of Hong Kong, Shatin, New Territories (Hong Kong)

2014-01-28T23:59:59.000Z

332

Generic configuration management system for documentation and on-line beam optics applications in the CERN PS complex  

E-Print Network [OSTI]

Generic configuration management system for documentation and on-line beam optics applications in the CERN PS complex

Autin, Bruno; Jensen, O; Kazymov, A; Lindroos, M; Schinzel, Josi; Wildner, E

1996-01-01T23:59:59.000Z

333

An investigation of plastic torsion in circular prismatic bars with a concentric or eccentric hole using the sand-heap analogy  

E-Print Network [OSTI]

through 11. Figure 7 shows the maximum strength in torsion when the circular shaft has an interior hole. Figure 8 predicts the maximum strength in torsion of a circular shaft with a keyway. It is noted in the tables that when the offset distance c has...AN INVESTIGATION OF PLASTIC TORSION IN CIRCULAR PRISMATIC BARS WITH A CONCENTRIC OR ECCENTRIC HOLE USING THE SAND-HEAP ANALOGY A Thesis by GERALD JOHN CAREY, JR. Submitted to the Graduate School of the Agricultural and Mechanical College...

Carey, Gerald John, Jr

1963-01-01T23:59:59.000Z

334

Synchrotron Radiation Circular Dichroism (SRCD) Spectroscopy: An Emerging Method in Structural Biology for Examining Protein Conformations and Protein Interactions  

SciTech Connect (OSTI)

Circular dichroism (CD) spectroscopy is a well-established technique in structural biology. The use of synchrotron radiation as an intense light source for these measurements extends the applications possible using lab-based instruments. In recent years, there has been a major growth in synchrotron radiation circular dichroism (SRCD) beamlines worldwide, including ones at the NSLS, ISA, SRS, HiSOR, BSRF, NSRRC, SOLEIL, Diamond, TERAS, BESSYII, and ANKA synchrotrons. Through the coordinated efforts of beamline scientists and users at these sites, important proof-of-principle studies have been done enabling the method to be developed for novel and productive studies on biological systems. This paper describes the characteristics of SRCD beamlines and some of the new types of applications that have been undertaken using these beamlines.

Wallace, B.A.; Sutherland, J.; Gekko, K.; Hoffmann, S. V.; Lin, Y.-H.; Tao, Y.; Wien, F.; Janes, R. W.

2011-09-01T23:59:59.000Z

335

Compact circularly polarized slot-ring antenna and microstrip bandpass filter using triangular open-loop resonators  

E-Print Network [OSTI]

Committee Members, Gregory Huff Edgar Sanchez-Sinencio Kenith Meissner Head of Department, Costas Georghiades December 2006 Major Subject: Electrical Engineering iii ABSTRACT Compact Circularly Polarized Slot-Ring Antenna.... Gregory Huff, Dr. Edgar Sanchez-Sinencio and Dr. Kenith Meissner for serving as members of my thesis committee. Next, I would like to thank Mr. Ming-Yi Li for his assistance in fabricating all the circuits that I designed. Finally, I would like to thank...

Farooqui, Muhammad Fahad

2007-04-25T23:59:59.000Z

336

On the ability of various circular inspiral templates to capture inspiral gravitational waves from compact binaries having tiny orbital eccentricities  

E-Print Network [OSTI]

We probe the ability of various types of post-Newtonian(PN)-accurate circular templates to capture inspiral gravitational-wave (GW) signals from compact binaries having tiny orbital eccentricities. The GW signals are constructed by adapting the phasing formalism, available in T. Damour, A. Gopakumar, and B. R. Iyer, [Phys. Rev. D 70, 064028 (2004)], employing the orbital energy and the time-eccentricity to describe the orbital evolution. Using the fitting factor estimates, relevant for the initial LIGO, we show that circular templates, based on the adiabatic TaylorT1, complete adiabatic TaylorT1 and TaylorT4 approximants are unable to capture our GW signals from compact binaries having tiny residual orbital eccentricities. However, the 2PN-order circular inspiral templates based on the recently introduced TaylorEt approximant are found to be both effectual and faithful in capturing GWs from inspiralling compact binaries having moderate eccentricities and we provide physical explanations for our observations.

Manuel Tessmer; Achamveedu Gopakumar

2012-02-28T23:59:59.000Z

337

2-dimensional numerical simulations for the wave-wake-body interactions around circular cylinders in motion near seabed  

E-Print Network [OSTI]

grid system. In this thesis, several flow configurations, such as stationary and oscillating cylinder, were studied in order to predict and to understand the hydrodynamic forces. The results from the different simulations were compared with available...

Tavassoli, Armin

1999-01-01T23:59:59.000Z

338

Improved resummation of post-Newtonian multipolar waveforms from circularized compact binaries  

SciTech Connect (OSTI)

We improve and generalize a resummation method of post-Newtonian multipolar waveforms from circular (nonspinning) compact binaries introduced in Refs. 1,2. One of the characteristic features of this resummation method is to replace the usual additive decomposition of the standard post-Newtonian approach by a multiplicative decomposition of the complex multipolar waveform h{sub lm} into several (physically motivated) factors: (i) the Newtonian waveform, (ii) a relativistic correction coming from an 'effective source', (iii) leading-order tail effects linked to propagation on a Schwarzschild background, (iv) a residual tail dephasing, and (v) residual relativistic amplitude corrections f{sub lm}. We explore here a new route for resumming f{sub lm} based on replacing it by its l-th root: {rho}{sub lm}=f{sub lm}{sup 1/l}. In the extreme-mass-ratio case, this resummation procedure results in a much better agreement between analytical and numerical waveforms than when using standard post-Newtonian approximants. We then show that our best approximants behave in a robust and continuous manner as we deform them by increasing the symmetric mass ratio {nu}{identical_to}m{sub 1}m{sub 2}/(m{sub 1}+m{sub 2}){sup 2} from 0 (extreme-mass-ratio case) to 1/4 (equal-mass case). The present paper also completes our knowledge of the first post-Newtonian corrections to multipole moments by computing ready-to-use explicit expressions for the first post-Newtonian contributions to the odd-parity (current) multipoles.

Damour, Thibault [Institut des Hautes Etudes Scientifiques, 91440 Bures-sur-Yvette (France); ICRANet, 65122 Pescara (Italy); Iyer, Bala R. [Institut des Hautes Etudes Scientifiques, 91440 Bures-sur-Yvette (France); Raman Research Insitute, Bangalore 560 080 (India); Nagar, Alessandro [Institut des Hautes Etudes Scientifiques, 91440 Bures-sur-Yvette (France); ICRANet, 65122 Pescara (Italy); INFN, Sezione di Torino, Via Pietro Giuria 1, Torino (Italy)

2009-03-15T23:59:59.000Z

339

STUDY OF SINGLE-LOBED CIRCULAR POLARIZATION PROFILES IN THE QUIET SUN  

SciTech Connect (OSTI)

The existence of asymmetries in the circular polarization (Stokes V) profiles emerging from the solar photosphere has been known since the 1970s. These profiles require the presence of a velocity gradient along the line of sight (LOS), possibly associated with gradients of magnetic field strength, inclination, and/or azimuth. We have focused our study on the Stokes V profiles showing extreme asymmetry in the form of only one lobe. Using Hinode spectropolarimetric measurements, we have performed a statistical study of the properties of these profiles in the quiet Sun. We show their spatial distribution, their main physical properties, how they are related with several physical observables, and their behavior with respect to their position on the solar disk. The single-lobed Stokes V profiles occupy roughly 2% of the solar surface. For the first time, we have observed their temporal evolution and have retrieved the physical conditions of the atmospheres from which they emerged using an inversion code implementing discontinuities of the atmospheric parameters along the LOS. In addition, we use synthetic Stokes profiles from three-dimensional magnetoconvection simulations to complement the results of the inversion. The main features of the synthetic single-lobed profiles are in general agreement with the observed ones, lending support to the magnetic and dynamic topologies inferred from the inversion. The combination of all these different analyses suggests that most of the single-lobed Stokes V profiles are signals coming from the magnetic flux emergence and/or submergence processes taking place in small patches in the photosphere of the quiet Sun.

Sainz Dalda, A. [Stanford-Lockheed Institute for Space Research, Stanford University, HEPL, 466 Via Ortega, Stanford, CA 94305-4085 (United States); Martinez-Sykora, J.; Title, A. [Lockheed Martin Solar and Astrophysics Laboratory, 3176 Porter Dr., Palo Alto, CA 94304 (United States); Bellot Rubio, L., E-mail: asdalda@stanford.edu, E-mail: asainz@lmsal.com [Instituto de Astrofisica de Andalucia, CSIC, Apdo. 3004, 18080 Granada (Spain)

2012-03-20T23:59:59.000Z

340

Target design optimization for an electron accelerator driven subcritical facility with circular and square beam profiles.  

SciTech Connect (OSTI)

A subcritical facility driven by an electron accelerator is planned at the Kharkov Institute of Physics and Technology (KIPT) in Ukraine for medical isotope production, materials research, training, and education. The conceptual design of the facility is being pursued through collaborations between ANL and KIPT. As part of the design effort, the high-fidelity analyses of various target options are performed with formulations to reflect the realistic configuration and the three dimensional geometry of each design. This report summarizes the results of target design optimization studies for electron beams with two different beam profiles. The target design optimization is performed via the sequential neutronic, thermal-hydraulic, and structural analyses for a comprehensive assessment of each configuration. First, a target CAD model is developed with proper emphasis on manufacturability to provide a basis for separate but consistent models for subsequent neutronic, thermal-hydraulic, and structural analyses. The optimizations are pursued for maximizing the neutron yield, streamlining the flow field to avoid hotspots, and minimizing the thermal stresses to increase the durability. In addition to general geometric modifications, the inlet/outlet channel configurations, target plate partitioning schemes, flow manipulations and rates, electron beam diameter/width options, and cladding material choices are included in the design optimizations. The electron beam interactions with the target assembly and the neutronic response of the subcritical facility are evaluated using the MCNPX code. the results for the electron beam energy deposition, neutron generation, and utilization in the subcritical pile are then used to characterize the axisymmetric heat generation profiles in the target assembly with explicit simulations of the beam tube, the coolant, the clad, and the target materials. Both tungsten and uranium are considered as target materials. Neutron spectra from tungsten and uranium are very similar allowing the use of either material in the subcritical assembly without changing its characteristics. However, the uranium target has a higher neutron yield, which increases the neutron flux of the subcritical assembly. Based on the considered dimensions and heat generation profiles, the commercial CFD software Star-CD is used for the thermal-hydraulic analysis of each target design to satisfy a set of thermal criteria, the most limiting of which being to maintain the water temperature 50 below the boiling point. It is found that the turbulence in the inlet channels dissipates quickly in narrow gaps between the target plates and, as a result, the heat transfer is limited by the laminar flow conditions. On average, 3-D CFD analyses of target assemblies agree well with 1-D calculations using RELAP (performed by KIPT). However, the recirculation and stagnation zones predicted with the CFD models prove the importance of a 3-D analysis to avoid the resulting hotspots. The calculated temperatures are subsequently used for the structural analysis of each target configuration to satisfy the other engineering design requirements. The thermo-structural calculations are performed mostly with NASTRAN and the results occasionally compared with the results from MARC. Both, NASTRAN and MARC are commercially available structural-mechanics analysis software. Although, a significant thermal gradient forms in target elements along the beam direction, the high thermal stresses are generally observed peripherally around the edge of thin target disks/plates. Due to its high thermal conductivity, temperatures and thermal stresses in tungsten target are estimated to be significantly lower than in uranium target. The deformations of the target disks/plates are found to be insignificant, which eliminate concerns for flow blockages in narrow coolant channels. Consistent with the specifications of the KIPT accelerator to be used in this facility, the electron beam power is 100-kW with electron energy in the range of 100 to 200 MeV. As expected, the 100 MeV el

Gohar, M. Y. A; Sofu, T.; Zhong, Z.; Belch, H.; Naberezhnev, D.; Nuclear Engineering Division

2008-10-30T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Operational concepts for the Environmental Restoration and Waste Management Configuration Study  

SciTech Connect (OSTI)

DOE has initiated a planning process in anticipation of upgrading all DOE waste management operations and facilities. The EM Configuration Study examines four areas: (1) planning considerations, (2) system configuration, (3) operational concepts, and (4) resource assessments. Each area is addressed by a different team. Objective of the Operational Concepts Team 3 study is to investigate, identify, define, and evaluate alternative ways to manage DOE waste management facilities, while taking into consideration the information gathered by the other EM Configuration teams. This report provides information and criteria for evaluating the relative effectiveness and efficiency of various organizational alternatives that can be used to operate and manage DOE waste facilities. Intent of this report is not to select one best management alternative but rather to provide recommendations, conclusions, and background information from which decisions will be made at a future date.

NONE

1990-12-01T23:59:59.000Z

342

Role of electric charge in shaping equilibrium configurations of fluid tori encircling black holes  

SciTech Connect (OSTI)

Astrophysical fluids may acquire nonzero electrical charge because of strong irradiation or charge separation in a magnetic field. In this case, electromagnetic and gravitational forces may act together and produce new equilibrium configurations, which are different from the uncharged ones. Following our previous studies of charged test particles and uncharged perfect fluid tori encircling compact objects, we introduce here a simple test model of a charged perfect fluid torus in strong gravitational and electromagnetic fields. In contrast to ideal magnetohydrodynamic models, we consider here the opposite limit of negligible conductivity, where the charges are tied completely to the moving matter. This is an extreme limiting case which can provide a useful reference against which to compare subsequent more complicated astrophysically motivated calculations. To clearly demonstrate the features of our model, we construct three-dimensional axisymmetric charged toroidal configurations around Reissner-Nordstroem black holes and compare them with equivalent configurations of electrically neutral tori.

Kovar, Jiri; Slany, Petr; Stuchlik, Zdenek; Karas, Vladimir; Cremaschini, Claudio; Miller, John C. [Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava Bezrucovo nam. 13, CZ-74601 Opava (Czech Republic); Astronomical Institute, Academy of Sciences, Bocni II, CZ-14131 Prague (Czech Republic); SISSA and INFN, Via Bonomea 265, I-34136 Trieste (Italy); SISSA and INFN, Via Bonomea 265, I-34136 Trieste, Italy and Department of Physics (Astrophysics), University of Oxford, Keble Road, Oxford OX1 3RH (United Kingdom)

2011-10-15T23:59:59.000Z

343

Existence of exotic torus configuration in high-spin excited states of $^{40}$Ca  

E-Print Network [OSTI]

We investigate the possibility of the existence of the exotic torus configuration in the high-spin excited states of $^{40}$Ca. We here consider the spin alignments about the symmetry axis. To this end, we use a three-dimensional cranked Skyrme Hartree-Fock method and search for stable single-particle configurations. We find one stable state with the torus configuration at the total angular momentum $J=$ 60 $\\hbar$ and an excitation energy of about 170 MeV in all calculations using various Skyrme interactions. The total angular momentum J=60 $\\hbar$ consists of aligned 12 nucleons with the orbital angular momenta $\\Lambda=+4$, +5, and +6 for spin up-down neutrons and protons. The obtained results strongly suggest that a macroscopic amount of circulating current breaking the time-reversal symmetry emerges in the high-spin excited state of $^{40}$Ca.

T. Ichikawa; J. A. Maruhn; N. Itagaki; K. Matsuyanagi; P. -G. Reinhard; S. Ohkubo

2012-07-26T23:59:59.000Z

344

Laser systems configured to output a spectrally-consolidated laser beam and related methods  

DOE Patents [OSTI]

A laser apparatus includes a plurality of pumps each of which is configured to emit a corresponding pump laser beam having a unique peak wavelength. The laser apparatus includes a spectral beam combiner configured to combine the corresponding pump laser beams into a substantially spatially-coherent pump laser beam having a pump spectrum that includes the unique peak wavelengths, and first and second selectively reflective elements spaced from each other to define a lasing cavity including a lasing medium therein. The lasing medium generates a plurality of gain spectra responsive to absorbing the pump laser beam. Each gain spectrum corresponds to a respective one of the unique peak wavelengths of the substantially spatially-coherent pump laser beam and partially overlaps with all other ones of the gain spectra. The reflective elements are configured to promote emission of a laser beam from the lasing medium with a peak wavelength common to each gain spectrum.

Koplow, Jeffrey P. (San Ramon, CA)

2012-01-10T23:59:59.000Z

345

Carver Configuration  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to someone6Energy,MUSEUM DISPLAYCareers The

346

Configurations The  

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

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

347

System Configuration  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security AdministrationcontrollerNanocrystallineForeign Object Damage 3Nationalmimic key features ofMIT

348

Edison Configuration  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series toESnet4: Networking for the Future of DOEEarthAlamos

349

Franklin Configuration  

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

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

350

Strings in plane-fronted gravitational waves  

E-Print Network [OSTI]

Brinkmann's plane-fronted gravitational waves with parallel rays --~shortly pp-waves~-- are shown to provide, under suitable conditions, exact string vacua at all orders of the sigma-model perturbation expansion.

C. Duval; Z. Horvath; P. A. Horvathy

2006-02-13T23:59:59.000Z

351

Foil cycling technique for the VESUVIO spectrometer operating in the resonance detector configuration  

SciTech Connect (OSTI)

This article reports a novel experimental technique, namely, the foil cycling technique, developed on the VESUVIO spectrometer (ISIS spallation source) operating in the resonance detector configuration. It is shown that with a proper use of two foils of the same neutron absorbing material it is possible, in a double energy analysis process, to narrow the width of the instrumental resolution of a spectrometer operating in the resonance detector configuration and to achieve an effective subtraction of the neutron and gamma backgrounds. Preliminary experimental results, obtained from deep inelastic neutron scattering measurements on lead, zirconium hydride, and deuterium chloride samples, are presented.

Schooneveld, E. M.; Mayers, J.; Rhodes, N. J.; Pietropaolo, A.; Andreani, C.; Senesi, R.; Gorini, G.; Perelli-Cippo, E.; Tardocchi, M. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX (United Kingdom); Consiglio Nazionale delle Ricerche-Istituto Nazionale per la Fisica della Materia, Universita degli Studi di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome (Italy); Dipartimento di Fisica, Universita degli Studi di Roma 'Tor Vergata', Via della Ricerca Scientifica 1, 00133 Rome (Italy); Dipartimento di Fisica 'G. Occhialini', Universita degli Studi di Milano Bicocca, Piazza della Scienza 2, I-20126 Milan (Italy) and CNR-INFM, Universita degli Studi di Milano Bicocca, Piazza della Scienza 2, I-20126 Milan (Italy)

2006-09-15T23:59:59.000Z

352

Operational concepts and implementation strategies for the design configuration management process.  

SciTech Connect (OSTI)

This report describes operational concepts and implementation strategies for the Design Configuration Management Process (DCMP). It presents a process-based systems engineering model for the successful configuration management of the products generated during the operation of the design organization as a business entity. The DCMP model focuses on Pro/E and associated activities and information. It can serve as the framework for interconnecting all essential aspects of the product design business. A design operation scenario offers a sense of how to do business at a time when DCMP is second nature within the design organization.

Trauth, Sharon Lee

2007-05-01T23:59:59.000Z

353

Electronic properties of quasi one-dimensional quantum wire models under equal coupling strength superpositions of Rashba and Dresselhaus spin-orbit interactions in the presence of an in-plane magnetic field  

SciTech Connect (OSTI)

In this paper one deals with the theoretical derivation of energy bands and of related wavefunctions characterizing quasi 1D semiconductor heterostructures, such as InAs quantum wire models. Such models get characterized this time by equal coupling strength superpositions of Rashba and Dresselhaus spin-orbit interactions of dimensionless magnitude a under the influence of in-plane magnetic fields of magnitude B. We found that the orientations of the field can be selected by virtue of symmetry requirements. For this purpose one resorts to spin conservations, but alternative conditions providing sensible simplifications of the energy-band formula can be reasonably accounted for. Besides the wavenumber k relying on the 1D electron, one deals with the spin-like s=±1 factors in the front of the square root term of the energy. Having obtained the spinorial wavefunction, opens the way to the derivation of spin precession effects. For this purpose one resorts to the projections of the wavenumber operator on complementary spin states. Such projections are responsible for related displacements proceeding along the Ox-axis. This results in a 2D rotation matrix providing both the precession angle as well as the precession axis.

Papp, E. [Physics Department, West University of Timisoara, RO-300223, Timisoara (Romania); Micu, C.; Racolta, D. [Faculty of Science, North University of Baia Mare, RO-430122, Baia Mare (Romania)

2013-11-13T23:59:59.000Z

354

Effects of symmetry on circular and linear magnetic dichroism in angle-resolved photoemission spectra of Gd/Y (0001) and Fe-Ni//Cu (001)  

SciTech Connect (OSTI)

We have observed circular and linear magnetic dichroism in angle- resolved photoemission spectra of 50-monolayer Gd film grown on Y(0001) and 6-monolayer Fe-Ni alloy films grown on Cu(001). The 4f level of Gd and the Fe 3p level of the Fe-Ni alloy were measured. A different geometry was used for the magnetic circular dichroism than was used to measure the magnetic linear dichroism. The geometries were chosen so that the shape of the magnetic circular dichroism is predicted to be equal to the shape of the magnetic linear dichroism for four-fold symmetric Fe-Ni/Cu(001) but not for three-fold symmetric Gd/Y(0001). Experimental results are presented. In this paper we examine the effect of symmetry (experimental geometry and sample geometry) on magnetic linear and circular dichroism in angle- resolved photoemission. In particular we chose separate geometries for measuring magnetic circular and magnetic linear dichroism. The geometries were chosen such that samples with four-fold symmetry about the sample normal may have magnetic circular and magnetic linear dichroism of the same shape. But samples with three-fold symmetry should not exhibit circular and magnetic linear dichroism of the same shape. The samples studied are three-fold symmetric Gd films grown on Y(0001) and four-fold symmetric Fe-Ni alloy grown on Cu(001). After presenting the methods of the experiment, we briefly review parts of a model of magnetic dichroism developed by Venus and coworkers and our specialization and extension of it, particularly for FeNi/Cu(001). We then show the results of our measurements.

Goodman, K.W.; Tobin, J.G.; Schumann, F.O. [Pennsylvania State Univ., University Park, PA (United States); Willis, R.F. [Pennsylvania State Univ., University Park, PA (United States); Gammon, J.W. [Virginia Commonwealth Univ., Richmond, VA (United States); Pappas, D.P. [Virginia Commonwealth Univ., Richmond, VA (United States); Kortright, J.B. [Lawrence Berkeley National Lab., CA (United States); Denlinger, J.D. [Lawrence Berkeley National Lab., CA (United States); Rotenberg, E. [Lawrence Berkeley National Lab., CA (United States); Warwick, A. [Lawrence Berkeley National Lab., CA (United States); Smith, N.V. [Lawrence Berkeley National Lab., CA (United States)

1997-03-26T23:59:59.000Z

355

Solar Energy Materials & Solar Cells 91 (2007) 13881391 Bifacial configurations for CdTe solar cells  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 91 (2007) 1388­1391 Bifacial configurations for CdTe solar We present a different back contact for CdTe solar cell by the application of only a transparent that acts as a free-Cu stable back contact and at the same time allows to realize bifacial CdTe solar cells

Romeo, Alessandro

356

Optimal Battery Configuration in a Residential Home with Time-of-Use Pricing  

E-Print Network [OSTI]

is higher. Energy arbitrage leverages these different energy prices by buying the extra energy when the prices are low, storing it in an energy storage device and then using the stored energy when the priceOptimal Battery Configuration in a Residential Home with Time-of-Use Pricing Baris Aksanli

Simunic, Tajana

357

Numerical evaluation of one-loop diagrams near exceptional momentum configurations  

SciTech Connect (OSTI)

One problem which plagues the numerical evaluation of one-loop Feynman diagrams using recursive integration by part relations is a numerical instability near exceptional momentum configurations. In this contribution we will discuss a generic solution to this problem. As an example we consider the case of forward light-by-light scattering.

Walter T Giele; Giulia Zanderighi; E.W.N. Glover

2004-07-06T23:59:59.000Z

358

Dynamic rupture through a branched fault2 configuration at Yucca Mountain and resulting3  

E-Print Network [OSTI]

Dynamic rupture through a branched fault2 configuration at Yucca Mountain and resulting3 ground analyses. This is motivated by the normal faults in the vicinity10 of Yucca Mountain, NV, a potential site fault12 located approximately 1 km west of the crest of Yucca Mountain, is the13 most active

Dmowska, Renata

359

Dynamic Rupture through a Branched Fault Configuration at Yucca Mountain, and Resulting Ground Motions  

E-Print Network [OSTI]

Dynamic Rupture through a Branched Fault Configuration at Yucca Mountain, and Resulting Ground of Yucca Mountain, Nevada, a potential site for a high-level radioactive waste repository. The Solitario km away from the SCF beneath the crest of Yucca Mountain, causing the repository site to experience

360

Determination of Peptide Amide Configuration in a Model Amyloid Fibril by Solid-State NMR  

E-Print Network [OSTI]

-42, with sequence LMVGGVVIA) forms a structured aggregate which is classified as an amyloid fibril based primarilyDetermination of Peptide Amide Configuration in a Model Amyloid Fibril by Solid-State NMR P. R these aggregates form. The primary constituent of the amyloid plaques characteristic of AD are a family of 39

Griffin, Robert G.

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Field-reversed configuration formation scheme utilizing a spheromak and solenoid induction  

E-Print Network [OSTI]

Field-reversed configuration formation scheme utilizing a spheromak and solenoid induction S. P FRC formation technique is described, where a spheromak transitions to a FRC with inductive current are suppressed; spheromaks with a lighter majority species, such as neon and helium, either display a terminal

Ji, Hantao

362

Configuration and Control of the ATLAS Trigger and Data Acquisition Giovanna Lehmann Miotto,a  

E-Print Network [OSTI]

in which major upgrades were performed and we will assess the status of the system which has been used aspects of control and configuration of the ATLAS TDAQ existed already. Vali- dation was done on small scale systems with real detector readout [3] or on large computing farms with simulated data [4]. All

Anjos, André

363

Green Move: a platform for highly configurable, heterogeneous electric vehicle sharing  

E-Print Network [OSTI]

Green Move: a platform for highly configurable, heterogeneous electric vehicle sharing Andrea G the spreading of electric vehicles, in particular for what concerns the high upfront costs of the vehicles benefits. I. INTRODUCTION Electric vehicle sharing has the potential to provide a solution to many

Cugola, Gianpaolo

364

CRAD, Configuration Management- Oak Ridge National Laboratory High Flux Isotope Reactor Contractor ORR  

Broader source: Energy.gov [DOE]

A section of Appendix C to DOE G 226.1-2 "Federal Line Management Oversight of Department of Energy Nuclear Facilities." Consists of Criteria Review and Approach Documents (CRADs) used for a February 2007 assessment of the Configuration Management Program portion of an Operational Readiness Review of the Oak Ridge National Laboratory, High Flux Isotope Reactor.

365

CRAD, Configuration Management- Oak Ridge National Laboratory High Flux Isotope Reactor  

Broader source: Energy.gov [DOE]

A section of Appendix C to DOE G 226.1-2 "Federal Line Management Oversight of Department of Energy Nuclear Facilities." Consists of Criteria Review and Approach Documents (CRADs) used for a February 2007 assessment of the Configuration Management Program in preparation for restart of the Oak Ridge National Laboratory, High Flux Isotope Reactor.

366

Automated Diagnosis of Product-line Configuration Errors on Feature Models  

E-Print Network [OSTI]

Automated Diagnosis of Product-line Configuration Errors on Feature Models Jules White and Doulas Feature models are widely used to model software product-line (SPL) variability. SPL variants are config Introduction Current trends and challenges. Software Product- Lines (SPLs) are a technique for creating

Schmidt, Douglas C.

367

The Effect of Thermal Load Configurations on Passive Chilled Beam Performance  

E-Print Network [OSTI]

dynamics (CFD) model was developed in Star CCM+ v6.06 and used for further analysis of the flow field and to predict additional spatial arrangements of the beam, interior dimensions, and heat source configurations. The CFD model implemented a calculation...

Nelson, Ian 1982-

2012-11-15T23:59:59.000Z

368

Workload-Based Configuration of MEMS-Based Storage Devices for Mobile Systems  

E-Print Network [OSTI]

Data layout, MEMS, Probe-Based Storage 1. INTRODUCTION Users of battery-powered mobile systems requireWorkload-Based Configuration of MEMS-Based Storage Devices for Mobile Systems Mohammed G. Khatib.h.hartel@utwente.nl ABSTRACT Because of its small form factor, high capacity, and expected low cost, MEMS-based storage

Miller, Ethan L.

369

LAGEOS-type Satellites in Critical Supplementary Orbit Configuration and the Lense-Thirring Effect Detection  

E-Print Network [OSTI]

In this paper we analyze quantitatively the concept of LAGEOS--type satellites in critical supplementary orbit configuration (CSOC) which has proven capable of yielding various observables for many tests of General Relativity in the terrestrial gravitational field, with particular emphasis on the measurement of the Lense--Thirring effect.

Lorenzo Iorio; David M. Lucchesi

2003-05-20T23:59:59.000Z

370

LAGEOS--type Satellites in Critical Supplementary Orbit Configuration and the Lense--Thirring Effect Detection  

E-Print Network [OSTI]

In this paper we analyze quantitatively the concept of LAGEOS--type satellites in critical supplementary orbit configuration (CSOC) which has proven capable of yielding various observables for many tests of General Relativity in the terrestrial gravitational field, with particular emphasis on the measurement of the Lense--Thirring effect.

Iorio, L; Iorio, Lorenzo; Lucchesi, David M.

2003-01-01T23:59:59.000Z

371

A Computational Market Model for Distributed Configuration Design Michael P. Wellman  

E-Print Network [OSTI]

of distributed configuration design problems. Given a design problem, the model defines a computational economy viewpoint for analyzing distributed design problems. #12;This page intentionally blank #12. Computational support for distributed design collaboration presents a variety of new challenges (Cutkosky et al

Wellman, Michael P.

372

Configure Microsoft Outlook 2011 for Mac HMS Help Desk: (617) 432-2000  

E-Print Network [OSTI]

Configure Microsoft Outlook 2011 for Mac HMS Help Desk: (617) 432 HMS Help Desk: (617) 432-2000 2 · Click on the icon to the left Help Desk: (617) 432-2000 3 · Enter the following fields: o E

Blackwell, Keith

373

Internal Friction Controls the Speed of Protein Folding from a Compact Configuration  

E-Print Network [OSTI]

Internal Friction Controls the Speed of Protein Folding from a Compact Configuration Suzette A is independent of the cosolutes used to adjust solvent friction. Therefore, interactions within the interior. Interestingly, we find a very strong temperature dependence in these "internal friction"-controlled dynamics

Roder, Heinrich

374

SUMTIME-MOUSAM: Configurable Marine Weather Forecast Generator Somayajulu G. Sripada and Ehud Reiter  

E-Print Network [OSTI]

Weathernews (UK) Ltd. Aberdeen iand@wni.com Abstract Numerical weather prediction (NWP) models produce time is done using guidance from Numerical Weather Prediction (NWP) models; time series data from the NWPSUMTIME-MOUSAM: Configurable Marine Weather Forecast Generator Somayajulu G. Sripada and Ehud

Reiter, Ehud

375

Method for preparing configured silicon carbide whisker-reinforced alumina ceramic articles  

DOE Patents [OSTI]

A ceramic article of alumina reinforced with silicon carbide whiskers suitable for the fabrication into articles of complex geometry are provided by pressureless sintering and hot isostatic pressing steps. In accordance with the method of the invention a mixture of 5 to 10 vol. % silicon carbide whiskers 0.5 to 5 wt. % of a sintering aid such as yttria and the balance alumina powders is ball-milled and pressureless sintered in the desired configuration in the desired configuration an inert atmosphere at a temperature of about 1800.degree. C. to provide a self-supporting configured composite of a density of at least about 94% theoretical density. The composite is then hot isostatically pressed at a temperature and pressure adequate to provide configured articles of at least about 98% of theoretical density which is sufficient to provide the article with sufficient strength and fracture toughness for use in most structural applications such as gas turbine blades, cylinders, and other components of advanced heat engines.

Tiegs, Terry N. (Lenoir City, TN)

1987-01-01T23:59:59.000Z

376

Security Investigations on an Asynchronous PLA Configuration Petros Oikonomakos, Simon Moore  

E-Print Network [OSTI]

Security Investigations on an Asynchronous PLA Configuration Petros Oikonomakos, Simon Moore the potential of using asynchronous PLAs in security applications. For this purpose, we borrow a promising PLA to random logic in VLSI systems [1, 2]. The regularity of a PLA layout makes its timing predictable

Moore, Simon

377

Parallel Interleaver Architecture with New Scheduling Scheme for High Throughput Configurable Turbo Decoder  

E-Print Network [OSTI]

Parallel Interleaver Architecture with New Scheduling Scheme for High Throughput Configurable Turbo}@rice.edu, yuanbinguo@huawei.com Abstract--Parallel architecture is required for high throughput turbo decoder to meet also shows great flexibility and scalability compared to prior work. Index Terms--VLSI, turbo decoder

Mellor-Crummey, John

378

Automated Derivation of Configurations for the Integration of Software(+) Engineering Environments  

E-Print Network [OSTI]

Integration for Flexible Automation Systems" Vienna University of Technology Vienna, Austria {stefan.biffl, richard.mordinyi, thomas.moser}@tuwien.ac.at Abstract--Today's systems integration technologies enable model-driven approach for the automated derivation of integration technology configurations

379

Effect of electrode configuration and electronic conductivity on current density distribution measurements in PEM fuel cells  

E-Print Network [OSTI]

EFFECT OF ELECTRODE CONFIGURATION AND ELECTRONIC CONDUCTIVITY ON CURRENT DENSITY DISTRIBUTION MEASUREMENTS IN PEM FUEL CELLS by Dilip Natarajan and Trung Van Nguyen* Department of Chemical and Petroleum Engineering University of Kansas... words: PEM fuel cells, conventional gas distributor, current density distribution, segmented electrode, mathematical modeling * Author to whom correspondence should be addressed ABSTRACT Current density and potential distribution measurements...

Natarajan, Dilip; Nguyen, Trung Van

2004-09-03T23:59:59.000Z

380

String Tests of 3S1P Configurations for Electric Energy Storage Applications  

E-Print Network [OSTI]

String Tests of 3S1P Configurations for Electric Energy Storage Applications Prepared for the U.2 Deliverable 2 Report on Results of Storage Tests Prepared by Hawai`i Natural Energy Institute School of OceanPConfigurationsfor ElectricEnergyStorageApplications Matthieu Dubarry and Bor Yann Liaw Hawaii Natural Energy

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Towards a Zero-Configuration Wireless Sensor Network Architecture for Smart Buildings  

E-Print Network [OSTI]

Towards a Zero-Configuration Wireless Sensor Network Architecture for Smart Buildings Lars Schor. Within a smart building many sensors and actuators are interconnected to form a control system. Nowa {lschor, sommer, wattenhofer}@tik.ee.ethz.ch Abstract Today's buildings account for a large fraction

382

Configuration Optimization of a Nanosphere Array on Top of a Thin Film Solar Cell  

E-Print Network [OSTI]

solar cell fabrication. Index Terms -- Nanospheres, Whispering gallery modes, Photovoltaic systems is done. For a hexagonally close packed sphere configuration, we vary the size of the spheres as well in the photovoltaics industry [2]. II. DESCRIPTION OF THE MODEL Our approach here is to consider an array

Atwater, Harry

383

Degradation of transparent conductive oxides; Mechanistic insights across configurations and exposures  

E-Print Network [OSTI]

. An encapsulated configuration study was conducted on ITO and AZO, exposing samples to the above accel- erated applications, durability concerns arise. The cost and reliability of solar power are often cited as a primary been reported in thin film silicon solar modules123 , CIGS modules456 and OPV technologies78910

Rollins, Andrew M.

384

Escape configuration lattice near the nematic-isotropic transition: Tilt analogue of blue phases  

E-Print Network [OSTI]

We predict the possible existence of a new phase of liquid crystals near the nematic-isotropic ($ NI $) transition. This phase is an achiral, tilt-analogue of the blue phase and is composed of a lattice of {\\em double-tilt}, escape-configuration cylinders. We discuss the structure and the stability of this phase and provide an estimate of the lattice parameter.

Buddhapriya Chakrabarti; Yashodhan Hatwalne; N. V. Madhusudana

2006-04-28T23:59:59.000Z

385

Representation and Self-Configuration of Physical Entities in Extended Smart Grid Perimeter  

E-Print Network [OSTI]

1 Representation and Self-Configuration of Physical Entities in Extended Smart Grid Perimeter Zheng of Smart Grids to Smart Energy Management Systems in relevant domains, we propose a framework and a set. INTRODUCTION THE smaller scales of the smart grid may involve the de- centralized management of semi

Paris-Sud XI, Université de

386

Figure 1: Configuration of energy recovering system Modeling of an Electromechanical Energy Harvesting  

E-Print Network [OSTI]

of the system are integrated permanent magnets (PM) with the magnetic fields in opposition. This arrangement induction, v is the displacement's speed of permanent magnet, d is the displacement, pe is the coil position Fig.1, shows the detailed configuration of the proposed energy recovering system. In the central shaft

Paris-Sud XI, Université de

387

Fusion Engineering and Design 38 (1997) 87113 Configuration and engineering design of the ARIES-RS  

E-Print Network [OSTI]

Fusion Engineering and Design 38 (1997) 87­113 Configuration and engineering design of the ARIES on the reversed-shear tokamak mode of plasma operation, and using moderately advanced engineering concepts appears to offer the best combination of good economic performance and physics credibility for a tokamak

California at San Diego, University of

388

Selecting the appropriate input data set when configuring a permanent workforce  

E-Print Network [OSTI]

of new personnel planning and scheduling problems for management. With over 70% of the global workforceSelecting the appropriate input data set when configuring a permanent workforce Jonathan F. Bard to use when running a scheduling model to select a permanent workforce for a service facility. Because

Bard, Jonathan

389

Observation of inner-shell-excited configurations in triply ionized cerium Ce{sup 3+}  

SciTech Connect (OSTI)

We report wavelength measurements and energy levels for the three-times ionized cerium atom Ce{sup 3+}. The spectrum is that of a simple one-electron atom overlaid with a more complex three-electron spectrum originating from the excitation of an electron in the inner closed shell to the valence shell. The data provide energy levels for the inner-shell-excited configurations 5p{sup 5}4f5d and 5p{sup 5}4f6s and solve a long-standing puzzle regarding the fine structure of the 5p{sup 6}6d configuration, which is known to be anomalously large and inverted. The data show that this anomalous fine structure is the result of interaction between 5p{sup 6}6d and the inner-shell-excited configuration 5p{sup 5}4f5d. The results are supported by Hartree-Fock calculations and least-squares fits of the energy parameters to the observed levels. From our observed 5p{sup 6}6g configuration, we determine the ionization energy as 297670{+-}70 cm{sup -1} (36.906{+-}0.009 eV)

Reader, Joseph; Wyart, Jean-Francois [National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); Laboratoire Aime Cotton, CNRS, Universite Paris-Sud, Batiment 505, 91405 Orsay Cedex (France)

2009-10-15T23:59:59.000Z

390

IV. STATION CONFIGURATION AND SENSOR COMPARISONS Comparison of solar radiation data gathered at  

E-Print Network [OSTI]

8 IV. STATION CONFIGURATION AND SENSOR COMPARISONS Comparison of solar radiation data gathered of the instruments used to monitor the incident solar radiation. Five types of so- lar sensors and several different data loggers have been used to gather the solar radiation data presented in this data book

Oregon, University of

391

CRAD, Configuration Management- Los Alamos National Laboratory TA 55 SST Facility  

Broader source: Energy.gov [DOE]

A section of Appendix C to DOE G 226.1-2 "Federal Line Management Oversight of Department of Energy Nuclear Facilities." Consists of Criteria Review and Approach Documents (CRADs) used for an assessment of the Configuration Management program at the Los Alamos National Laboratory, TA 55 SST Facility.

392

Business Process Configuration in The Cloud: How to Support and Analyze Multi-Tenant Processes?  

E-Print Network [OSTI]

Business Process Configuration in The Cloud: How to Support and Analyze Multi-Tenant Processes? W on performance related problems. However, cloud computing will also change the way in which business processes are man- aged and supported, e.g., more and more organizations will be sharing common processes

van der Aalst, Wil

393

Atomic moments in Mn2CoAl thin films analyzed by X-ray magnetic circular dichroism  

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

Spin gapless semiconductors are known to be strongly affected by structural disorder when grown epitaxially as thin films. The magnetic properties of Mn2CoAl thin films grown on GaAs (001) substrates are investigated here as a function of annealing. This study investigates the atomic-specific magnetic moments of Mn and Co atoms measured through X-ray magnetic circular dichroism as a function of annealing and the consequent structural ordering. The results indicate that the structural distortion mainly affects the Mn atoms as seen by the reduction of the magnetic moment from its predicted value. (auth)

Jamer M.; Sterbinsky G.; Assaf, B.; Arena, D.; Heiman, D.

2014-12-07T23:59:59.000Z

394

A photoelastic stress analysis of a flat circular plate simply supported and subjected to a concentrated load at the center  

E-Print Network [OSTI]

LIBRARy 4 4 III coI I BGv IIf Tf4 A PHOTOELASTIC STRESS ANALYSIS OF A FLAT CIRCULAR PLATE SIWPLY SUPPORTED AND SUBJECTED TO A CONCENTRATED LOAD AT THE CENTERS A Thesis By Joseph Lloyd Fulbright Submitted to the Graduate School... AND SUBJECTED TO A CONCENTRATED LOAD AT THE CENTER, A Thesis By Joseph Lloyd Fulbright Approved as to Style and Content by& Chairman of Committee Head of Department May 1/58 ACKNOWLEDGEMENT The technical assistance and advice of Professor B. E...

Fulbright, Joseph Lloyd

1958-01-01T23:59:59.000Z

395

Circularly polarized microwaves for magnetic resonance study in the GHz range: application to nitrogen-vacancy in diamonds  

E-Print Network [OSTI]

The ability to create time-dependent magnetic fields of controlled polarization is essential for many experiments with magnetic resonance. We describe a microstrip circuit that allows us to generate strong magnetic field at microwave frequencies with arbitrary adjusted polarization. The circuit performance is demonstrated by applying it to an optically detected magnetic resonance and Rabi nutation experiments in nitrogen-vacancy color centers in diamond. Thanks to high efficiency of the proposed microstrip circuit and degree of circular polarization of 85% it is possible to address the specific spin states of a diamond sample using a low power microwave generator.

Mrozek, Mariusz; Rudnicki, Daniel S; Gawlik, Wojciech

2015-01-01T23:59:59.000Z

396

Extremal Correlator of Three Vertex Operators for Circular Winding Strings in AdS5xS5  

E-Print Network [OSTI]

We study a three-point correlator of the three heavy vertex operators representing the circular winding string states which are point-like in AdS_5 and rotating with two spins and two winding numbers in S^5. We restrict ourselves to the case that two of the three vertex operators are located at the same point. We evaluate semiclassically the specific three-point correlator on a stationary splitting string trajectory which is mapped to the complex plane with three punctures. It becomes an extremal and 4d conformal invariant three-point correlator on the boundary. The marginality condition of the vertex operator is discussed.

Shijong Ryang

2011-09-15T23:59:59.000Z

397

A Single Tower Configuration of the Modular Gamma Box Counter System - 13392  

SciTech Connect (OSTI)

Canberra's Standard Gamma Box Counter System is designed to perform accurate quantitative assays of gamma emitting nuclides for a wide range of large containers including B-25 crates and ISO shipping containers. Using a modular building-block approach, the system offers tremendous flexibility for a variety of measurement situations with wide ranges of sample activities and throughput requirements, as well as the opportunity to modify the configuration for other applications at a later date. The typical configuration consists of two opposing towers each equipped with two high purity germanium detectors, and an automated container trolley. This paper presents a modified configuration, consisting of a single tower placed inside a measurement trailer with three detector assemblies, allowing for additional vertical segmentation as well as a viewing a container outside the trailer through the trailer wall. An automatic liquid nitrogen fill system is supplied for each of the detectors. The use of a forklift to move the container for horizontal segmentation is accommodated by creating an additional operational and calibration set-up in the NDA 2000 software to allow for the operator to rotate the container and assay the opposite side, achieving the same sensitivity as a comparable two-tower system. This Segmented Gamma Box Counter System retains the core technologies and design features of the standard configuration. The detector assemblies are shielded to minimize interference from environmental and plant background, and are collimated to provide segmentation of the container. The assembly positions can also be modified in height and distance from the container. The ISOCS calibration software provides for a flexible approach to providing the calibrations for a variety of measurement geometries. The NDA 2000 software provides seamless operation with the current configuration, handling the data acquisition and analysis. In this paper, an overview of this system is discussed, along with the measured performance results, calibration methodology and verification, and minimum detectable activity levels. (authors)

Morris, K.; Nakazawa, D.; Francalangia, J.; Gonzalez, H. [Canberra Industries Inc., 800 Research Parkway, Meriden, CT, 06450 (United States)] [Canberra Industries Inc., 800 Research Parkway, Meriden, CT, 06450 (United States)

2013-07-01T23:59:59.000Z

398

Configuring Entourage 2008 w/ Exchange Web Services. Note: These instruction assume that the Exchange Web Services (EWS) Update  

E-Print Network [OSTI]

Configuring Entourage 2008 w/ Exchange Web Services. Note: These instruction assume that the Exchange Web Services (EWS) Update , also known as Entourage 13.0, has already been

Blackwell, Keith

399

A new soft X-ray magnetic circular dichroism facility at the BSRF beamline 4B7B  

E-Print Network [OSTI]

X-ray magnetic circular dichroism (XMCD) has become an important and powerful tool because it allows the study of material properties in combination with elemental specificity, chemical state specificity, and magnetic specificity. A new soft X-ray magnetic circular dichroism apparatus has been developed at the Beijing Synchrotron Radiation Facility (BSRF). The apparatus combines three experimental conditions: ultra-high-vacuum environment, moderate magnetic fields and in-situ sample preparation to measure the absorption signal. We designed a C type dipole electromagnet that provides magnetic fields up to 0.5T in parallel (or anti-parallel) direction relative to the incoming X-ray beam. The performances of the electromagnet are measured and the results show good agreement with the simulation ones. Following film grown in situ by evaporation methods, XMCD measurements are performed. Combined polarization corrections, the magnetic moments of the Fe and Co films determined by sum rules are consistent with other theoretical predictions and experimental measurements.

Zhi-Ying Guo; Cai-Hao Hong; Hai-Ying Xing; Kun Tang; Wei Xui; Dong-liang Chen; Ming-Qi Cui; YI-Dong Zhao

2014-06-04T23:59:59.000Z

400

Generation of circularly polarized multiple high-order harmonic emission from two-color crossed laser beams  

E-Print Network [OSTI]

laser beams Xiao-Min Tong and Shih-I Chu Department of Chemistry, University of Kansas and Kansas Center field and a linearly polarized second-harmonic laser field, in crossed-beam con- figuration second-harmonic field, in crossed-beam configuration. We demonstrate the feasibility of such a scheme

Chu, Shih-I

Note: This page contains sample records for the topic "in-plane circular configuration" 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

On the Configuration of the US Western Interconnection Voltage Stability Boundary  

SciTech Connect (OSTI)

Abstract—Stability limits are considered in power system planning and operations to estimate the available stability margins and, if possible, to maximize the utilization of transmission facilities. These important tasks are influenced by configuration of the stability boundary. The paper introduces a new fast approach to explore the voltage stability boundary of a large system and reveal its detailed multidimensional structure. The 17939-bus U.S. Western Interconnection planning model was used to illustrate the method. Significant peculiarities of the boundary’s configuration were identified, including its nonconvexity, discontinuity, branching and internal singularities (“holes”) that were not known before and could not been found by traditional methods. Experiments using WECC system are performed to evaluate the computation time using different methods. Our results show that the proposed methods are very promising in reducing calculation time and complexity

Makarov, Yuri V.; Vyakaranam, Bharat; Wu, Di; Hou, Zhangshuan; Elbert, Stephen T.; Huang, Zhenyu

2014-04-01T23:59:59.000Z

402

Insulated conductor temperature limited heater for subsurface heating coupled in a three-phase WYE configuration  

DOE Patents [OSTI]

A heating system for a subsurface formation is described. The heating system includes a first heater, a second heater, and a third heater placed in an opening in the subsurface formation. Each heater includes: an electrical conductor; an insulation layer at least partially surrounding the electrical conductor; and an electrically conductive sheath at least partially surrounding the insulation layer. The electrical conductor is electrically coupled to the sheath at a lower end portion of the heater. The lower end portion is the portion of the heater distal from a surface of the opening. The first heater, the second heater, and the third heater are electrically coupled at the lower end portions of the heaters. The first heater, the second heater, and the third heater are configured to be electrically coupled in a three-phase wye configuration.

Vinegar, Harold J. (Bellaire, TX); Sandberg, Chester Ledlie (Palo Alto, CA)

2010-11-09T23:59:59.000Z

403

Formation of a field reversed configuration for magnetic and electrostatic confinement of plasma  

DOE Patents [OSTI]

A system and method for containing plasma and forming a Field Reversed Configuration (FRC) magnetic topology are described in which plasma ions are contained magnetically in stable, non-adiabatic orbits in the FRC. Further, the electrons are contained electrostatically in a deep energy well, created by tuning an externally applied magnetic field. The simultaneous electrostatic confinement of electrons and magnetic confinement of ions avoids anomalous transport and facilitates classical containment of both electrons and ions. In this configuration, ions and electrons may have adequate density and temperature so that upon collisions they are fused together by nuclear force, thus releasing fusion energy. Moreover, the fusion fuel plasmas that can be used with the present confinement system and method are not limited to neutronic fuels only, but also advantageously include advanced fuels.

Rostoker, Norman; Binderbauer, Michl

2003-12-16T23:59:59.000Z

404

Level-Rank Duality in Chern-Simons Theory from a Non-Supersymmetric Brane Configuration  

E-Print Network [OSTI]

We derive level-rank duality in pure Chern-Simons gauge theories from a non-supersymmetric Seiberg duality by using a non-supersymmetric brane configuration in type IIB string theory. The brane configuration consists of fivebranes, N D3 antibranes and an O3 plane. By swapping the fivebranes we derive a 3d non-supersymmetric Seiberg duality. After level shifts from loop effects, this identifies the IR of Sp(2N)_{2k-2N+2} and Sp(2k-2N+2)_{-2N} pure Chern-Simons theories, which is a level-rank pair. We also derive level-rank duality in a Chern-Simons theory based on a unitary group.

Adi Armoni; Edwin Ireson

2014-08-20T23:59:59.000Z

405

Formation of a field reversed configuration for magnetic and electrostatic confinement of plasma  

DOE Patents [OSTI]

A system and method for containing plasma and forming a Field Reversed Configuration (FRC) magnetic topology are described in which plasma ions are contained magnetically in stable, non-adiabatic orbits in the FRC. Further, the electrons are contained electrostatically in a deep energy well, created by tuning an externally applied magnetic field. The simultaneous electrostatic confinement of electrons and magnetic confinement of ions avoids anomalous transport and facilitates classical containment of both electrons and ions. In this configuration, ions and electrons may have adequate density and temperature so that upon collisions they are fused together by nuclear force, thus releasing fusion energy. Moreover, the fusion fuel plasmas that can be used with the present confinement system and method are not limited to neutronic fuels only, but also advantageously include advanced fuels.

Rostoker, Norman; Binderbauer, Michl; Qerushi, Artan; Tahsiri, Hooshang

2006-02-07T23:59:59.000Z

406

Formation of a field reversed configuration for magnetic and electrostatic confinement of plasma  

DOE Patents [OSTI]

A system and method for containing plasma and forming a Field Reversed Configuration (FRC) magnetic topology are described in which plasma ions are contained magnetically in stable, non-adiabatic orbits in the FRC. Further, the electrons are contained electrostatically in a deep energy well, created by tuning an externally applied magnetic field. The simultaneous electrostatic confinement of electrons and magnetic confinement of ions avoids anomalous transport and facilitates classical containment of both electrons and ions. In this configuration, ions and electrons may have adequate density and temperature so that upon collisions they are fused together by nuclear force, thus releasing fusion energy. Moreover, the fusion fuel plasmas that can be used with the present confinement system and method are not limited to neutronic fuels only, but also advantageously include advanced fuels.

Rostoker, Norman; Binderbauer, Michl; Qerushi, Artan; Tahsiri, Hooshang

2007-02-20T23:59:59.000Z

407

Photovoltaic power converter system with a controller configured to actively compensate load harmonics  

DOE Patents [OSTI]

Photovoltaic power converter system including a controller configured to reduce load harmonics is provided. The system comprises a photovoltaic array and an inverter electrically coupled to the array to generate an output current for energizing a load connected to the inverter and to a mains grid supply voltage. The system further comprises a controller including a first circuit coupled to receive a load current to measure a harmonic current in the load current. The controller includes a second circuit to generate a fundamental reference drawn by the load. The controller further includes a third circuit for combining the measured harmonic current and the fundamental reference to generate a command output signal for generating the output current for energizing the load connected to the inverter. The photovoltaic system may be configured to compensate harmonic currents that may be drawn by the load.

de Rooij, Michael Andrew (Clifton Park, NY); Steigerwald, Robert Louis (Burnt Hills, NY); Delgado, Eladio Clemente (Burnt Hills, NY)

2008-12-16T23:59:59.000Z

408

arXiv:1201.5447v1[math.DG]26Jan2012 CRITICAL CONFIGURATIONS OF PLANAR ROBOT ARMS  

E-Print Network [OSTI]

arXiv:1201.5447v1[math.DG]26Jan2012 CRITICAL CONFIGURATIONS OF PLANAR ROBOT ARMS G these results to the case of open polygonal chains, or robot arms. We introduce the notion of the oriented area of various special configurations of robot arms modeled by open polygonal chains appears essential in many

Siersma, Dirk

409

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

410

A numerical study of steady-state vortex configurations and vortex pinning in type-II superconductors  

E-Print Network [OSTI]

are presented. Transitions between different multi-vortex states as H is changed is demonstrated by abrupt changes in vortex configurations and jumps in the B vs H plot. An efficient scheme to determine the equilibrium vortex configuration in a mesoscopic system...

Kim, Sangbum

2006-04-12T23:59:59.000Z

411

Research on Pinches driven by SPEED 2 Generator: Hard X-ray and Neutron Emission in Plasma Focus Configuration.  

E-Print Network [OSTI]

Research on Pinches driven by SPEED 2 Generator: Hard X-ray and Neutron Emission in Plasma Focus works developed in SPEED2 at DĂĽsseldorf were done in a plasma focus configuration for soft X considers experiments in different pinch configurations (plasma focus, gas puffed plasma focus, gas embedded

Paris-Sud XI, Université de

412

Overall Power Core Configuration and System Integration for ARIES-ACT1 Fusion Power Plant , M.S. Tillack1  

E-Print Network [OSTI]

Overall Power Core Configuration and System Integration for ARIES-ACT1 Fusion Power Plant X.R. Wang Consulting, Fliederweg 3, D 76351 Linkenheim-Hochstetten, GERMANY, smalang@web.de ARIES-ACT1 power plant has been designed and configured to allow for rapid removal of the full power core sectors followed

California at San Diego, University of

413

Electron density and temperature profile diagnostics for C-2 field reversed configuration plasmas  

SciTech Connect (OSTI)

The 9-point Thomson scattering diagnostic system for the C-2 field reversed configuration plasmas is improved and the measured electron temperature profiles are consistent with theoretical expectations. Rayleigh scattering revealed a finite line width of the ruby laser emission, which complicates density calibration. Taking advantage of the plasma wobble motion, density profile reconstruction accuracy from the 6-chord two-color CO{sub 2}/HeNe interferometer data is improved.

Deng, B. H.; Kinley, J. S.; Schroeder, J. [Tri Alpha Energy, Inc., Rancho Santa Margarita, California 92688 (United States)

2012-10-15T23:59:59.000Z

414

Multiparticle-multihole configuration mixing description of nuclear many-body systems  

SciTech Connect (OSTI)

In this work we discuss the multiparticle-multihole configuration mixing method which aims to describe the structure of atomic nuclei. Based on a variational principle it is able to treat in a unified way all types of long-range correlations between nucleons, without introducing symmetry breaking. The formalism is presented along with some preliminary results obtained for a few sd-shell nuclei. In the presented applications, the D1S Gogny force has been used.

Robin, C.; Pillet, N.; Le Bloas, J.; Berger, J.-F. [CEA/DAM/DIF, F-91297 Arpajon (France); Zelevinsky, V. G. [Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)

2014-10-15T23:59:59.000Z

415

Supplemental information I. OPTICAL-LASER AND X-RAY CONFIGURATION  

E-Print Network [OSTI]

Supplemental information I. OPTICAL-LASER AND X-RAY CONFIGURATION The experiment used 70 fs x-ray and x-ray pulses was established by the initial decrease in the 111 diffraction peak in a laser pulses at 10 keV from the LCLS in the high-charge (250 pC) mode at 120 Hz. The x-ray beam was focused

Loss, Daniel

416

Signature of the eta-NN configurations in coherent pi0 photoproduction on the deuteron  

E-Print Network [OSTI]

The photoproduction of a neutral pion on the deuteron is considered in the energy region around the eta threshold, where a bump-like structure was observed at very backward pion angles. Different dynamical aspects which may be responsible for this phenomenon are analysed within a theoretical frame which includes intermediate eta-NN configurations. The results show in particular, that a three-body treatment of the eta-NN interaction is of special importance.

A. Fix

2005-09-13T23:59:59.000Z

417

T-562: Novell ZENworks Configuration Management novell-tftp.exe Buffer Overflow  

Broader source: Energy.gov [DOE]

A vulnerability has been reported in Novell ZENworks Configuration Management, which can be exploited by malicious people to compromise a vulnerable system. The vulnerability is caused due to a boundary error in novell-tftp.exe when parsing requests. This can be exploited to cause a heap-based buffer overflow via a specially crafted request sent to UDP port 69. The vulnerability is reported in versions 10.3.1, 10.3.2, and 11.0.

418

An approximate model for the performance and acoustic predictions of counterrotating propeller configurations  

E-Print Network [OSTI]

at three advance ratios Noise levels and frequency spectra were calculated at s. number of locations around the configuration. The directivity patterns of the harmonics in both the horizontal and vertical planes were examined, with the conclusion... that the noise levels of the even harmonics are relatively independent of direction whereas the noise levels of the odd harmonics are extremely dependent on azimuthal direction in the horizontal plane The equations of Succi are examined to explain...

Denner, Brett William

1989-01-01T23:59:59.000Z

419

Software solutions manage the definition, operation, maintenance and configuration control of the National Ignition Facility  

SciTech Connect (OSTI)

The National Ignition Facility (NIF) is the world's largest laser composed of millions of individual parts brought together to form one massive assembly. Maintaining control of the physical definition, status and configuration of this structure is a monumental undertaking yet critical to the validity of the shot experiment data and the safe operation of the facility. The NIF business application suite of software provides the means to effectively manage the definition, build, operation, maintenance and configuration control of all components of the National Ignition Facility. State of the art Computer Aided Design software applications are used to generate a virtual model and assemblies. Engineering bills of material are controlled through the Enterprise Configuration Management System. This data structure is passed to the Enterprise Resource Planning system to create a manufacturing bill of material. Specific parts are serialized then tracked along their entire lifecycle providing visibility to the location and status of optical, target and diagnostic components that are key to assessing pre-shot machine readiness. Nearly forty thousand items requiring preventive, reactive and calibration maintenance are tracked through the System Maintenance & Reliability Tracking application to ensure proper operation. Radiological tracking applications ensure proper stewardship of radiological and hazardous materials and help provide a safe working environment for NIF personnel.

Dobson, D; Churby, A; Krieger, E; Maloy, D; White, K

2011-07-25T23:59:59.000Z

420

Passive Superconducting Flux Conservers for Rotating-Magnetic-Field-Driven Field-Reversed Configurations  

SciTech Connect (OSTI)

The Princeton Field-Reversed Configuration (PFRC) experiment employs an odd-parity rotating magnetic field (RMFo) current drive and plasma heating system to form and sustain high-? plasmas. For radial confinement, an array of coaxial, internal, passive, flux-conserving (FC) rings applies magnetic pressure to the plasma while still allowing radio-frequency RMFo from external coils to reach the plasma. The 3 ms pulse duration of the present experiment is limited by the skin time (?fc) of its room-temperature copper FC rings. To explore plasma phenomena with longer characteristic times, the pulse duration of the next-generation PFRC-2 device will exceed 100 ms, necessitating FC rings with (?fc > 300 ms. In this paper we review the physics of internal, discrete, passive FCs and describe the evolution of the PFRC's FC array. We then detail new experiments that have produced higher performance FC rings that contain embedded high-temperature superconducting (HTS) tapes. Several HTS tape winding configurations have been studied and a wide range of extended skin times, from 0.4 s to over 103 s, has been achieved. The new FC rings must carry up to 3 kA of current to balance the expected PFRC-2 plasma pressure, so the dependence of the HTS-FC critical current on the winding configuration and temperature was also studied. From these experiments, the key HTS-FC design considerations have been identified and HTS-FC rings with the desired performance characteristics have been produced.

E. Oz, C.E. Myers, M.R. Edwards, B. Berlinger, A. Brooks, and S.A. Cohen

2011-01-05T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

A photoelastic stress analysis of simply supported circular plates with holes in the centers and subjected to uniform loads along the inner edges  

E-Print Network [OSTI]

LIBRARY 4 s s rpLgFOF OF TEXAS A PHOTOEIAJFfIC STRESS ANALYSIS OF SIMPLY SUPPORTED CIRCULAR PLATES WITH ROLES IN THE CENTERS AND SUBJECTED TO UNIFORM MADE AION) THE INNER EDGES A Thesis HARRY JEROME SWEET Suhsitted to the Graduate School... of the Agricultural and Mechanical College of Texas in partial fulfiilwent of the requirements for the degree of NaF 195B Na)or Sub)eet s Mechanical Engineering A PHOTOELASTIC STfSSS ANALYSIS OF SIHPLY SUPPORTED CIRCULAR PLATES WITH HOLES IN THE CENTERS...

Sweet, Harry Jerome

2012-06-07T23:59:59.000Z

422

Spin oscillations of relativistic fermions in the field of a traveling circularly polarized electromagnetic wave and a constant magnetic field  

E-Print Network [OSTI]

The Dirac equation, in the field of a traveling circularly polarized electromagnetic wave and a constant magnetic field, has singular solutions, corresponding the expansion of energy in vicinity of some singular point. These solutions described relativistic fermions. States relating to these solutions are not stationary. The temporal change of average energy, momentum and spin for single and mixed states is studied in the paper. A distinctive feature of the states is the disappearance of the longitudinal component of the average spin. Another feature is the equivalence of the condition of fermion minimal energy and the classical condition of the magnetic resonance. Finding such solutions assumes the use of a transformation for rotating and co-moving frames of references. Comparison studies of solutions obtained with the Galilean and non-Galilean transformation shown that some parameters of the non-Galilean transformation may be measured in high-energy physics.

Boris V. Gisin

2014-05-13T23:59:59.000Z

423

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

424

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

425

Parity-violating photon circular polarization in $nd\\rightarrow$ $^3H?$ with effective field theory at thermal energy  

E-Print Network [OSTI]

We study the parity-violating effects in $nd\\rightarrow$ $^3H\\gamma$ process using pionless effective field theory (EFT($//!/!/!/pi$)) at thermal energy. For the weak $NN$ interaction the parity-violating Lagrangian contains five independent low-energy coupling constants (LECs). One can fix the coupling constants by comparison of the calculated observables with a sufficient number of experimental data. So, we need five observables to obtain LECs. One of the five parity-violating observables is the photon circular polarization ($P_\\gamma$) in $nd\\rightarrow$ $^3H\\gamma$ process. We calculate $P_\\gamma$ at the leading order in terms of LECs. We compare our results with the previous $P_\\gamma$ calculation based on the model of Desplanques, Donoghue, and Holstein.

M. Moeini Arani; S. Bayegan

2013-09-18T23:59:59.000Z

426

Yield drag in a two-dimensional foam flow around a circular obstacle: Effect of liquid fraction  

E-Print Network [OSTI]

We study the two-dimensional flow of foams around a circular obstacle within a long channel. In experiments, we confine the foam between liquid and glass surfaces. In simulations, we use a deterministic software, the Surface Evolver, for bubble details and a stochastic one, the extended Potts model, for statistics. We adopt a coherent definition of liquid fraction for all studied systems. We vary it in both experiments and simulations, and determine the yield drag of the foam, that is, the force exerted on the obstacle by the foam flowing at very low velocity. We find that the yield drag is linear over a large range of the ratio of obstacle to bubble size, and is independent of the channel width over a large range. Decreasing the liquid fraction, however, strongly increases the yield drag; we discuss and interpret this dependence.

Christophe Raufaste; B. Dollet; Simon Cox; Yi Jiang; François Graner

2007-07-09T23:59:59.000Z

427

Search for variations in circular-polarization spectra of the magnetic white dwarf LP790-29  

E-Print Network [OSTI]

We present highly time resolved circular-polarization and flux spectra of the magnetic white dwarf LP790-29 taken with the VLT UT1 in order to test the hypothesis that LP790-29 is a fast rotator with a period of the order of seconds to minutes. Due to low time resolution of former observations this might have been overlooked -- leading to the conclusion that LP790-29 has a rotational period of over 100 years. The optical spectrum exhibits one prominent absorption feature with minima at about 4500, 4950, and 5350 A, which are most likely C2 Swan-bands shifted by about 180 A in a magnetic field between 50MG and 200MG. At the position of the absorption structures the degree of circular polarization varies between -1% and +1%, whereas it amounts to +8 to +10% in the blue and red continuum. With this very high degree of polarization lp790-29 is very well suited to a search for short time variations, since a variation of several percent in the polarization can be expected for a magnetic field oblique to the rotational axis. From our analysis we conclude that variations on time scales from 50 to 2500 seconds must have amplitudes <0.7% in the continuum and <2% in the strongest absorption feature at 4950A. While no short-term variations could be found a careful comparison of our polarization data of LP790-29 with those in the literatures indicates significant variations on time scales of decades with a possible period of about 24-28 years.

Stefan Jordan; Susanne Friedrich

2002-01-09T23:59:59.000Z

428

EMCORORG uses cross-correlation procedures to determine the location of the origin (center) of particles which appear circular in projection.  

E-Print Network [OSTI]

to produce the BATCH command procedure that computes the set of projections. After this is done, EMICOEMCORORG uses cross-correlation procedures to determine the location of the origin (center) of particles which appear circular in projection. This program can be implemented in one of three distinct

Baker, Timothy S.

429

B3 Trains Problem Statement The train problem assumes a circular track 101 miles in circumference. The track is labeled clockwise in  

E-Print Network [OSTI]

B3 Trains ­ Problem Statement The train problem assumes a circular track 101 miles in circumference be at the same spot as mile 0. One train starts at mile 0 going clockwise, another train starts at mile 100 going counterclockwise. The program prompts for speeds of each train in mph. The output is the mile (or fraction

Huth, Michael

430

Biology Lab 3: Small Scale Plasmid DNA Purification (Minipreps) Plasmids are small, circular pieces of DNA (about 3-5 kilobases in length on average) that  

E-Print Network [OSTI]

Biology Lab 3: Small Scale Plasmid DNA Purification (Minipreps) Plasmids are small, circular pieces. Plasmid purification procedures selectively enrich plasmid DNA over genomic DNA, which is present the small plasmids remain intact. Thus, when denatured, the plasmids remain linked to their complementary

431

Reduced matrix elements of spin–spin interactions for the atomic f-electron configurations  

SciTech Connect (OSTI)

A re-examination of some major references on the intra-atomic magnetic interactions over the last six decades reveals that there exist some gaps or puzzles concerning the previous studies of the spin–spin interactions for the atomic f-shell electrons. Hence, tables are provided for the relevant reduced matrix elements of the four double-tensor operators z{sub r} (r=1,2,3, and 4) of rank 2 in both the orbital and spin spaces. The range of the tables covers all states of the configurations from f{sup 4} to f{sup 7}.

Yeung, Y.Y., E-mail: yeungy@acm.org

2014-03-15T23:59:59.000Z

432

Relativistic configuration-interaction calculation of the correlation energies of heliumlike ions. Revision 1  

SciTech Connect (OSTI)

A new relativistic configuration-interaction (CI) method using B-spline basis functions has been developed to study the correlation energies of two-electron heliumlike ions. Based on the relativistic no-pair Hamiltonian, the CI equation leads to a symmetric eigenvalue problem involving large, dense matrices. Davidson`s method is used to obtain the lowest few eigenenergies and eigenfunctions. Results on transition energies and finite structure splittings for heliumlike ions are in very good agreement with experiment throughout the periodic table.

Cheng, K.T.; Chen, M.H. [Lawrence Livermore National Lab., CA (United States); Johnson, W.R. [Univ. of Notre Dame, IN (United States). Physics Dept.

1994-04-01T23:59:59.000Z

433

Gas-puff liner implosion in the configuration with helical current return rods  

SciTech Connect (OSTI)

Results of experiments with double-shell gas-puff liners carried out on a high-current MIG generator (2 MA, 80 ns) are presented. To stabilize the process of liner implosion and increase the efficiency of energy transfer from the generator to the liner plasma, a current return in the form of a multifilar helix was used. The effect of the configuration of the current return on the parameters of the generated pulses of argon and neon K-shell radiation (with photon energies of 3-5 and 0.9-1.5 keV, respectively) and the neutron yield from a deuterium liner were studied.

Sorokin, S. A., E-mail: s.sorokin@rambler.ru [Russian Academy of Sciences, Institute of High Current Electronics, Siberian Branch (Russian Federation)

2013-02-15T23:59:59.000Z

434

Atomic configuration of irradiation-induced planar defects in 3C-SiC  

SciTech Connect (OSTI)

The atomic configuration of irradiation-induced planar defects in single crystal 3C-SiC at high irradiation temperatures was shown in this research. A spherical aberration corrected scanning transmission electron microscope provided images of individual silicon and carbon atoms by the annular bright-field (ABF) method. Two types of irradiation-induced planar defects were observed in the ABF images including the extrinsic stacking fault loop with two offset Si-C bilayers and the intrinsic stacking fault loop with one offset Si-C bilayer. The results are in good agreement with images simulated under identical conditions.

Lin, Y. R. [Department of Engineering and System Science, National Tsing-Hua University, Hsinchu 30013, Taiwan (China); National Synchrotron Radiation Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan (China); Ho, C. Y. [Institute of Nuclear Engineering and Science, National Tsing-Hua University, Hsinchu 30013, Taiwan (China); Hsieh, C. Y.; Chang, M. T.; Lo, S. C. [Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan (China); Chen, F. R. [Department of Engineering and System Science, National Tsing-Hua University, Hsinchu 30013, Taiwan (China); Kai, J. J., E-mail: ceer0001@gmail.com [Department of Engineering and System Science, National Tsing-Hua University, Hsinchu 30013, Taiwan (China); Institute of Nuclear Engineering and Science, National Tsing-Hua University, Hsinchu 30013, Taiwan (China)

2014-03-24T23:59:59.000Z

435

Optimization of beam configuration in laser fusion based on the laser beam pattern  

SciTech Connect (OSTI)

A simple method based on the laser beam pattern is proposed and numerically demonstrated to optimize a beam configuration for direct drive laser fusion. In this method, both the geometrical factor G{sub l} and the single beam factor B{sub l} are considered. By diminishing the product of B{sub l}·G{sub l}, the irradiation nonuniformity can be decreased to the order of 10{sup ?5}. This optimization method can be applied on the design of irradiation systems for an arbitrary number of beams and any axially symmetric beam patterns.

Xu, Teng; Xu, Lixin; Wang, Anting; Gu, Chun; Wang, Shengbo; Liu, Jing; Wei, Ankun [Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China)] [Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China)

2013-12-15T23:59:59.000Z

436

Emergence of rotational bands in ab initio no-core configuration interaction calculations  

E-Print Network [OSTI]

Rotational bands have been observed to emerge in ab initio no-core configuration interaction (NCCI) calculations for p-shell nuclei, as evidenced by rotational patterns for excitation energies, electromagnetic moments, and electromagnetic transitions. We investigate the ab initio emergence of nuclear rotation in the Be isotopes, focusing on 9Be for illustration, and make use of basis extrapolation methods to obtain ab initio predictions of rotational band parameters for comparison with experiment. We find robust signatures for rotational motion, which reproduce both qualitative and quantitative features of the experimentally observed bands.

M. A. Caprio; P. Maris; J. P. Vary; R. Smith

2015-02-04T23:59:59.000Z

437

Conceptual configurations of an accelerator-driven subcritical system utilizing minor actinides  

SciTech Connect (OSTI)

This paper purposes an Accelerator-Driven Subcritical (ADS) system which utilizes the Minor Actinides (MAs) from the US spent nuclear fuel inventory. A mobile fuel concept with micro-particles suspended in the liquid metal is adopted in the purposed system to avoid difficulties of developing and testing new MAs solid fuel forms. Three ADS configurations were developed and analyzed using the Monte Carlo fuel burnup methodology. The analyses demonstrated the capabilities of the proposed system to utilize the MAs and to dispose of the US spent nuclear fuels. (authors)

Cao, Y.; Gohar, Y. [Nuclear Engineering Div., Argonne National Laboratory, 9700 South Cass Ave., IL 60439 (United States)

2012-07-01T23:59:59.000Z

438

Equipment configurations for use of ammonia in supermarket applications. Report for September 1992-May 1994  

SciTech Connect (OSTI)

The paper discusses equipment configurations for the use of ammonia in supermarket refrigeration applications. This paper identifies the optimal design for ammonia-secondary fluid systems and compares their performance to that of R22 systems. Three methods of staging the compression were compared for both refrigerants. Six secondary fluids were evaluated for use with ammonia in a supermarket system. Overall system performance of the ammonia-secondary fluid refrigeration system is governed by a large set of design parameters. The influence of these parameters on overall system performance was studied systematically. From this parametric study, design rules were developed, leading to optimum ammonia-secondary fluid systems.

McDowell, T.P.; Mitchell, J.W.; Klein, S.A.

1996-12-31T23:59:59.000Z

439

Optimization of membrane stack configuration for efficient hydrogen production in microbial reverse-electrodialysis electrolysis cells coupled  

E-Print Network [OSTI]

Optimization of membrane stack configuration for efficient hydrogen production in microbial reverse-electrodialysis 2013 Keywords: Microbial reverse-electrodialysis electrolysis cell Ammonium bicarbonate Hydrogen reverse electrodialysis (RED) stack into the MEC, which was called a microbial reverse-electrodialysis

440

The effect of hardware configuration on the performance of residential air conditioning systems at high outdoor ambient temperatures  

E-Print Network [OSTI]

A study was performed which investigated the effect of hardware configuration on air conditioning cooling system performance at high outdoor temperatures. The initial phase of the investigation involved the testing of ten residential air...

Bain, Joel Alan

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Modeling Hot Mix Asphalt Compaction Using a Thermodynamics Based Compressible Viscoelastic Model within the Framework of Multiple Natural Configurations  

E-Print Network [OSTI]

asphalt (HMA) using the notion of multiple natural configurations. A thermodynamic framework is employed to study the non-linear dissipative response associated with HMA by specifying the forms for the stored energy and the rate of dissipation function...

Koneru, Saradhi

2011-10-21T23:59:59.000Z

442

The Effects of Variable Quadriceps and Hamstring Loading Configurations on Knee Joint Kinematics During In Vitro Testing  

E-Print Network [OSTI]

in in vitro simulation. This study has two objectives to be examined during a deep knee squat: 1) measure the patellofemoral kinematics as a function of different loading configurations of the extensor mechanism and 2) measure the changes in tibiofemoral...

Shalhoub, Sami

2012-08-31T23:59:59.000Z

443

Measurement of rotordynamic coefficients for a high-speed flexure pivot tilting-pad bearing(load between pad) configuration  

E-Print Network [OSTI]

] .......................................................................................2 Figure 3. Main test section of the test rig .....................................................................................9 Figure 4. Shaker-stinger configuration (NDE side...)....................................................................10 Figure 5. Static loader assembly (NDE side)..............................................................................11 Figure 6. Thermocouples location on the FPB...

Al-Ghasem, Adnan Mahmoud

2005-08-29T23:59:59.000Z

444

H{sub 3}{sup +} molecular ion in a magnetic field: Linear parallel configuration  

SciTech Connect (OSTI)

A detailed study of the ground state of the H{sub 3}{sup +} molecular ion in linear configuration, parallel to the magnetic field direction, and its low-lying {sigma}, {pi}, and {delta} states is carried out for magnetic fields B=0-4.414x10{sup 13} G in the Born-Oppenheimer approximation. The variational method is employed with a single trial function which includes electronic correlation in the form exp({gamma}r{sub 12}), where {gamma} is a variational parameter. It is shown that the quantum numbers of the state of the lowest total energy (ground state) depend on the magnetic field strength. The ground state evolves from the spin-singlet {sup 1}{sigma}{sub g} state for weak magnetic fields B(less-or-similar sign)5x10{sup 8} G to a weakly bound spin-triplet {sup 3}{sigma}{sub u} state for intermediate fields and, eventually, to a spin-triplet {sup 3}{pi}{sub u} state for 5x10{sup 10}(less-or-similar sign)B(less-or-similar sign)4.414x10{sup 13} G. Local stability of the linear parallel configuration with respect to possible small deviations is checked.

Turbiner, A. V.; Guevara, N. L.; Lopez Vieyra, J. C. [Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-543, 04510 Mexico, D.F. (Mexico)

2007-05-15T23:59:59.000Z

445

Project W-211, initial tank retrieval systems, retrieval control system software configuration management plan  

SciTech Connect (OSTI)

This Software Configuration Management Plan (SCMP) provides the instructions for change control of the W-211 Project, Retrieval Control System (RCS) software after initial approval/release but prior to the transfer of custody to the waste tank operations contractor. This plan applies to the W-211 system software developed by the project, consisting of the computer human-machine interface (HMI) and programmable logic controller (PLC) software source and executable code, for production use by the waste tank operations contractor. The plan encompasses that portion of the W-211 RCS software represented on project-specific AUTOCAD drawings that are released as part of the C1 definitive design package (these drawings are identified on the drawing list associated with each C-1 package), and the associated software code. Implementation of the plan is required for formal acceptance testing and production release. The software configuration management plan does not apply to reports and data generated by the software except where specifically identified. Control of information produced by the software once it has been transferred for operation is the responsibility of the receiving organization.

RIECK, C.A.

1999-02-23T23:59:59.000Z

446

SCALE-4 Analysis of LaSalle Unit 1 BWR Commercial Reactor Critical Configuration  

SciTech Connect (OSTI)

Five commercial reactor criticals (CRCs) for the LaSalle Unit 1 boiling-water reactor have been analyzed using KENO V.a, the Monte Carlo criticality code of the SCALE 4 code system. The irradiated fuel assembly isotopics for the criticality analyses were provided by the Waste Package Design team at the Yucca Mountain Project in the United States, who performed the depletion calculations using the SAS2H sequence of SCALE 4. The reactor critical measurements involved two beginning-of-cycle and three middle-of-cycle configurations. The CRCs involved relatively low-cycle burnups, and therefore contained a relatively high gadolinium poison content in the reactor assemblies. This report summarizes the data and methods used in analyzing the critical configurations and assesses the sensitivity of the results to some of the modeling approximations used to represent the gadolinium poison distribution within the assemblies. The KENO V.a calculations, performed using the SCALE 44GROUPNDF5 ENDF/B-V cross-section library, yield predicted k{sub eff} values within about 1% {Delta}k/k relative to reactor measurements for the five CRCs using general 8-pin and 9-pin heterogeneous gadolinium poison pin assembly models.

Gauld, I.C.

2000-03-16T23:59:59.000Z

447

Solid oxide fuel cell generator with removable modular fuel cell stack configurations  

DOE Patents [OSTI]

A high temperature solid oxide fuel cell generator produces electrical power from oxidation of hydrocarbon fuel gases such as natural gas, or conditioned fuel gases, such as carbon monoxide or hydrogen, with oxidant gases, such as air or oxygen. This electrochemical reaction occurs in a plurality of electrically connected solid oxide fuel cells bundled and arrayed in a unitary modular fuel cell stack disposed in a compartment in the generator container. The use of a unitary modular fuel cell stack in a generator is similar in concept to that of a removable battery. The fuel cell stack is provided in a pre-assembled self-supporting configuration where the fuel cells are mounted to a common structural base having surrounding side walls defining a chamber. Associated generator equipment may also be mounted to the fuel cell stack configuration to be integral therewith, such as a fuel and oxidant supply and distribution systems, fuel reformation systems, fuel cell support systems, combustion, exhaust and spent fuel recirculation systems, and the like. The pre-assembled self-supporting fuel cell stack arrangement allows for easier assembly, installation, maintenance, better structural support and longer life of the fuel cells contained in the fuel cell stack. 8 figs.

Gillett, J.E.; Dederer, J.T.; Zafred, P.R.; Collie, J.C.

1998-04-21T23:59:59.000Z

448

Solid oxide fuel cell generator with removable modular fuel cell stack configurations  

DOE Patents [OSTI]

A high temperature solid oxide fuel cell generator produces electrical power from oxidation of hydrocarbon fuel gases such as natural gas, or conditioned fuel gases, such as carbon monoxide or hydrogen, with oxidant gases, such as air or oxygen. This electrochemical reaction occurs in a plurality of electrically connected solid oxide fuel cells bundled and arrayed in a unitary modular fuel cell stack disposed in a compartment in the generator container. The use of a unitary modular fuel cell stack in a generator is similar in concept to that of a removable battery. The fuel cell stack is provided in a pre-assembled self-supporting configuration where the fuel cells are mounted to a common structural base having surrounding side walls defining a chamber. Associated generator equipment may also be mounted to the fuel cell stack configuration to be integral therewith, such as a fuel and oxidant supply and distribution systems, fuel reformation systems, fuel cell support systems, combustion, exhaust and spent fuel recirculation systems, and the like. The pre-assembled self-supporting fuel cell stack arrangement allows for easier assembly, installation, maintenance, better structural support and longer life of the fuel cells contained in the fuel cell stack.

Gillett, James E. (Greensburg, PA); Dederer, Jeffrey T. (Valencia, PA); Zafred, Paolo R. (Pittsburgh, PA); Collie, Jeffrey C. (Pittsburgh, PA)

1998-01-01T23:59:59.000Z

449

A METHOD TO EXTRACT THE REDSHIFT DISTORTION {beta} PARAMETER IN CONFIGURATION SPACE FROM MINIMAL COSMOLOGICAL ASSUMPTIONS  

SciTech Connect (OSTI)

We present a method to extract the redshift-space distortion {beta} parameter in configuration space with a minimal set of cosmological assumptions. We show that a novel combination of the observed monopole and quadrupole correlation functions can remove efficiently the impact of mild nonlinearities and redshift errors. The method offers a series of convenient properties: it does not depend on the theoretical linear correlation function, the mean galaxy density is irrelevant, only convolutions are used, and there is no explicit dependence on linear bias. Analyses based on dark matter N-body simulations and Fisher matrix demonstrate that errors of a few percent on {beta} are possible with a full-sky, 1 (h {sup -1} Gpc){sup 3} survey centered at a redshift of unity and with negligible shot noise. We also find a baryonic feature in the normalized quadrupole in configuration space that should complicate the extraction of the growth parameter from the linear theory asymptote, but that does not have a major impact on our method.

Tocchini-Valentini, Domenico; Barnard, Michael; Bennett, Charles L.; Szalay, Alexander S., E-mail: dtv@pha.jhu.edu [Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686 (United States)

2012-10-01T23:59:59.000Z

450

Combining structured and unstructured data in a configurable web-based logbook  

SciTech Connect (OSTI)

A typical electronic logbook is designed as a general-purpose system for recording time-ordered events and actions and, therefore, allows for a great flexibility in recording information, but the data is unstructured. To better position it in a specific context (e.g., a, test facility, a group activity log) it needs to support both structured data (keyword, authors, etc) and unstructured data (text, title, attachments) in that context. To do this, a logbook system can define a set of attributes, possibly built as a hierarchy. These application-specific attributes will be associated with each entry. To be flexible, such a system has to be configurable to allow for tailoring it to each specific environment. The paper describes a design, functionality, and experiences with WebLog, a database-configurable electronic logbook developed with the J2EE Web technology. Various functional and technical properties of the system are discussed, including views, searches, threads of entries, an automated alerting system as well as integration with other applications.

Nogiec, J.; Trombly-Freytag, K.; /Fermilab

2009-10-01T23:59:59.000Z

451

Effect of tillage systems, row configuration-spacing and plant population on soil physical properties, evapotranspiration and dryland sorghum yields  

E-Print Network [OSTI]

University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1981 Major Subject: Soil Science EFFECT OF TILLAGE SYSTEMS, ROW CONFIGURATION-SPACING AND PLANT POPULATION ON SOIL PHYSICAL PROPERTIES& EVAPOTRANSPIRATION... Configuration-Spacing and Plant. Popular. ion on Soil Physical Properties, Evapotranspiration and Dryland Sorghum Yields. (December 1981). Jaime Roel Salinas-Garcfa, B. S. , Universidad Autdnoma de Nuevo Leon, Mexico. Co-Chairmen of Advisory Committee: Dr...

Salinas-Garcia, Jaime Roel

1981-01-01T23:59:59.000Z

452

INTERNATIONAL UNION OF OPERATING ENGINEERS NATIONAL HAZMAT PROGRAM - ADAMANT CIRCULAR SAW OENHP{number_sign}: 2001-05, VERSION A  

SciTech Connect (OSTI)

Florida International University's (FIU) Hemispheric Center for Environmental Technology (HCET) evaluated five saws for their effectiveness in cutting up specially prepared fiberglass-reinforced plywood crates. These crates were built as surrogates for crates that presently hold radioactive contaminated glove boxes at the Department of Energy's (DOE) Los Alamos facility. The Adamant circular saw was assessed on August 14, 2001. During the FIU test of efficacy, a team from the Operating Engineers National Hazmat Program (OENHP) evaluated the occupational safety and health issues associated with this technology. The Adamant was only used during a limited ''test'' on a regular plywood crate due to safety considerations of the tool for this application. The Adamant circular saw, a counter-rotating twin-cutter, constructed with blades that work differently than conventional cutting wheels with twin blades, each rotating in opposite directions. It is used to cut wood and metals. Each blade is approximately 8 3/4 inches in diameter with a maximum cutting depth of 2 1/2 inches. The machine has two rotation speeds: 1,900 and 2,900 rotations per minute (rpm). The saw is operated with an interlocked, guarded trigger switch located at the end of the saw opposite the cutting blades. To operate the saw, the safety interlock must be depressed prior to powering the saw with the trigger control. The saw is supported by a handle at the front of the saw near the cutting blades. The top part of the blades is guarded near the handle, with approximately three-fourths of the face of the blades exposed. The Adamant circular saw is an innovative technology used to cut metals and wood. Its safety features include: interlocking switch for powering the saw, overload indicator and shutoff, and an electronic brake that stops the engine immediately when the start button is released. The top part of the blades is guarded near the motor. With approximately three-fourths of the face of the blades open, the operator is exposed to the potential risk of serious and minor cuts and abrasions when using and handling the saw. There is also potential for damage to the blades if the saw is not stored properly. Without guarding on the lower part of the blades, these can be damaged if the saw is dropped or rested on the cutting blades. Based upon the industrial hygiene sampling conducted for the other four saws demonstrated at FIU, noise levels, nuisance dust, and airborne fiberglass may be a problem when using this technology for the cutting of fiberglass-reinforced plywood crates. No industrial hygiene sampling was conducted while the Adamant saw was in use. Engineering controls should be used to eliminate these problems whenever possible. Where this is not possible, administrative controls, training, and proper personal protective equipment (PPE) should be used. Respirators should be used if engineering controls do not sufficiently control the dust or fiberglass generated. Respirators should be equipped with an organic vapor and acid gas cartridge with High Efficiency Particulate Air (HEPA) filter, since during the demonstration, the workers complained of an odd smell, which may have been the breakdown of the fiberglass.

Unknown

2002-01-01T23:59:59.000Z

453

INTERNATIONAL UNION OF OPERATING ENGINEERS NATIONAL HAZMAT PROGRAM - EVOLUTION 180 CIRCULAR SAW OENHP: 2001-03, VERSION A  

SciTech Connect (OSTI)

Florida International University's (FIU) Hemispheric Center for Environmental Technology (HCET) evaluated five saws for their effectiveness in cutting specially prepared fiberglass-reinforced plywood crates. These crates were built as surrogates for crates that presently hold radioactively contaminated gloveboxes at the Department of Energy's (DOE) Los Alamos facility. The Evolution 180 circular saw was assessed on August 14, 2001. During the FIU test of efficacy, a team from the Operating Engineers National Hazmat Program (OENHP) evaluated the occupational safety and health issues associated with this technology. The Evolution 180 is a portable, metal cutting circular saw with a 7-inch diameter blade. The blade is contained within the main housing and has a retractable lower blade guard to prevent operator access to the blade during operation and shutdown. The saw is equipped with a chip collector. The maximum cutting thickness for metal is one-quarter inch and can cut steel tubing and pipe 2 inches in diameter. The unit is operated with an on/off guarded trigger switch and is supported with the hand guide mounted to the side of the saw. An adjustable lever sets the depth of the cut. The machine's circuitry will automatically shut the saw motor off if excessive overload is detected during operation. The one-half hour demonstration involved vertical and horizontal cuts and blade changes. During this process, operators experienced binding of the saw. This caused the blade to become hot, causing the sawdust collected in the chip collector to smoke. Care should be exercised to use the appropriate blade for the application, operator training, and personal protective equipment (PPE). Personal noise sampling indicated that neither worker was over the Occupational Safety and Health Administration's (OSHA) Action Level of 85 decibels (dBA) with time-weighted averages (TWA's) of 69.1 and 68.8 dBA. The personal noise sample taken during the special demonstration with the stainless steel plate had a TWA of 69.8 dBA. These data are not entirely representative as they were gathered during a simulation and not at the actual worksite. Additional sampling should be conducted on-site, but the workers should wear hearing protection until it is determined that it is no longer necessary. The total nuisance dust sample for the Evolution 180 circular saw was 3.5 milligrams per cubic meter (mg/m{sup 3}), which is lower than the OSHA Permissible Exposure Limit (PEL) of 15 mg/m{sup 3} and the American Conference of Governmental Industrial Hygienists' (ACGIH) Threshold Limit Value (TLV) of 10 mg/m{sup 3}. The fiber analysis yielded 1.74 fibers per cubic centimeter (f/cc), which is above the PEL of 1 f/cc. Although the nuisance dust levels were low, fiberglass dust levels were higher than the PEL. Since fiberglass dust is known to be a strong skin irritant and a possible human carcinogen, the workers should continue to wear appropriate suits and gloves, as well as a full-face air-purifying respirator. The respirator should be equipped with a combination organic vapor and acid gas cartridge in combination with a High Particulate Air (HEPA) filter, since particulate filter, since during the demonstration, the workers complained of an odd smell, which may have been from the breakdown of the fiberglass.

Unknown

2002-01-25T23:59:59.000Z

454

Critical Configuration and Physics Measurements for Assemblies of U(93.15)O2 Fuel Rods  

SciTech Connect (OSTI)

A series of critical experiments were completed in 1962-1965 at Oak Ridge National Laboratory’s (ORNL’s) Critical Experiments Facility (CEF) in support of the Medium-Power Reactor Experiments (MPRE) program. In the late 1950s, efforts were made to study “power plants for the production of electrical power in space vehicles.”(a) The MPRE program was a part of those efforts and studied the feasibility of a stainless-steel system, boiling potassium 1 MW(t), or about 140 kW(e), reactor. The program was carried out in [fiscal years] 1964, 1965, and 1966. A summary of the program’s effort was compiled in 1967. The delayed critical experiments were a mockup of a small, potassium-cooled space power reactor for validation of reactor calculations and reactor physics methods. Initial experiments, performed in November and December of 1962, consisted of a core of unmoderated stainless-steel tubes, each containing 26 UO2 fuel pellets, surrounded by a graphite reflector. Measurements were made to determine critical reflector arrangements, fission-rate distributions, and cadmium ratio distributions. Subsequent experiments used beryllium reflectors and also measured the reactivity for various materials placed in the core. “The [assemblies were built] on [a] vertical assembly machine so that the movable part was the core and bottom reflector.”(Reference 1) The experiment studied in this evaluation was the first of the series and had the fuel tubes packed tightly into a 22.87 cm outside diameter (OD) core tank. Two critical configurations were found by varying the amount of graphite reflector (References 1 and 2). Once the critical configurations had been achieved, various measurements of reactivity, relative axial and radial activation rates of 235U, , and cadmium ratios were performed. The cadmium ratio, reactivity, and activation rate measurements performed on the critical configurations are described in Sections 1.3, 1.4 and 1.7, respectively. Information for this evaluation was compiled from References 1 and 2, reports on subsequent experiments in the series , and the experimental logbook, and from communication with the experimenter, John T. Mihalczo.

Margaret A. Marshall

2013-03-01T23:59:59.000Z

455

Critical Configuration and Physics Measurements for Assemblies of U(93.15)O2 Fuel Rods  

SciTech Connect (OSTI)

A series of critical experiments were completed in 1962-1965 at Oak Ridge National Laboratory’s (ORNL’s) Critical Experiments Facility (CEF) in support of the Medium-Power Reactor Experiments (MPRE) program. In the late 1950s, efforts were made to study “power plants for the production of electrical power in space vehicles.”(a) The MPRE program was a part of those efforts and studied the feasibility of a stainless-steel system, boiling potassium 1 MW(t), or about 140 kW(e), reactor. The program was carried out in [fiscal years] 1964, 1965, and 1966. A summary of the program’s effort was compiled in 1967. The delayed critical experiments were a mockup of a small, potassium-cooled space power reactor for validation of reactor calculations and reactor physics methods. Initial experiments, performed in November and December of 1962, consisted of a core of unmoderated stainless-steel tubes, each containing 26 UO2 fuel pellets, surrounded by a graphite reflector. Measurements were made to determine critical reflector arrangements, fission-rate distributions, and cadmium ratio distributions. Subsequent experiments used beryllium reflectors and also measured the reactivity for various materials placed in the core. “The [assemblies were built] on [a] vertical assembly machine so that the movable part was the core and bottom reflector.”(Reference 1) The experiment studied in this evaluation was the first of the series and had the fuel tubes packed tightly into a 22.87 cm outside diameter (OD) core tank. Two critical configurations were found by varying the amount of graphite reflector (References 1 and 2). Once the critical configurations had been achieved, various measurements of reactivity, relative axial and radial activation rates of 235U, , and cadmium ratios were performed. The cadmium ratio, reactivity, and activation rate measurements performed on the critical configurations are described in Sections 1.3, 1.4 and 1.7, respectively. Information for this evaluation was compiled from References 1 and 2, reports on subsequent experiments in the series , and the experimental logbook, and from communication with the experimenter, John T. Mihalczo.

Margaret A. Marshall

2012-09-01T23:59:59.000Z

456

Effects of alpha beam on the parametric decay of a parallel propagating circularly polarized Alfven wave: Hybrid simulations  

SciTech Connect (OSTI)

Alfven waves with a finite amplitude are found to be unstable to a parametric decay in low beta plasmas. In this paper, the parametric decay of a circularly polarized Alfven wave in a proton-electron-alpha plasma system is investigated with one-dimensional (1-D) hybrid simulations. In cases without alpha particles, with the increase of the wave number of the pump Alfven wave, the growth rate of the decay instability increases and the saturation amplitude of the density fluctuations slightly decrease. However, when alpha particles with a sufficiently large bulk velocity along the ambient magnetic field are included, at a definite range of the wave numbers of the pump wave, both the growth rate and the saturation amplitude of the parametric decay become much smaller and the parametric decay is heavily suppressed. At these wave numbers, the resonant condition between the alpha particles and the daughter Alfven waves is satisfied, therefore, their resonant interactions might play an important role in the suppression of the parametric decay instability.

Gao, Xinliang; Lu, Quanming; Tao, Xin; Hao, Yufei; Wang, Shui [CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Science, University of Science and Technology of China, Hefei 230026 (China)] [CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Science, University of Science and Technology of China, Hefei 230026 (China)

2013-09-15T23:59:59.000Z

457

A circular equilibrium model for local gyrokinetic simulations of ion temperature gradient fluctuations in reversed field pinches  

SciTech Connect (OSTI)

A simple large-aspect-ratio (R{sub 0}/r) circular equilibrium model is developed for low-beta reversed field pinch (RFP) geometry. The model is suitable for treating small scale instability and turbulent transport driven by ion temperature gradient (ITG) and related electron drift modes in gyrokinetic simulations. The equilibrium model is an RFP generalization of the common tokamak s-{alpha} model to small safety factor (q), where the poloidal field dominates the toroidal field. The model accommodates the RFP toroidal field reversal (where q vanishes) by generalizing the cylindrical force-free Bessel function model (BFM) [J. B. Taylor, Phys. Rev. Lett. 33, 1139 (1974)] to toroidal geometry. The global equilibrium can be described in terms of the RFP field reversal and pinch parameters [F,{Theta}]. This new toroidal Bessel function model (TBFM) has been incorporated into the gyrokinetic code GYRO [J. Candy and R. E. Waltz, J.Comput. Phys. 186, 545 (2003)] and used here to explore local electrostatic ITG adiabatic electron instability rates for typical low-q RFP parameters.

Tangri, Varun; Terry, P. W. [Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706R (United States); Waltz, R. E. [General Atomics, San Diego, California 92186 (United States)

2011-05-15T23:59:59.000Z

458

Cadmium binding studies to the earthworm Lumbricus rubellus metallothionein by electrospray mass spectrometry and circular dichroism spectroscopy  

SciTech Connect (OSTI)

The earthworm Lumbricus rubellus has been found to inhabit cadmium-rich soils and accumulate cadmium within its tissues. Two metallothionein (MT) isoforms (1 and 2) have been identified and cloned from L. rubellus. In this study, we address the metalation status, metal coordination, and structure of recombinant MT-2 from L. rubellus using electrospray ionization mass spectrometry (ESI-MS), UV absorption, and circular dichroism (CD) spectroscopy. This is the first study to show the detailed mass and CD spectral properties for the important cadmium-containing earthworm MT. We report that the 20-cysteine L. rubellus MT-2 binds seven Cd{sup 2+} ions. UV absorption and CD spectroscopy and ESI-MS pH titrations show a distinct biphasic demetalation reaction, which we propose results from the presence of two metal-thiolate binding domains. We propose stoichiometries of Cd{sub 3}Cys{sub 9} and Cd{sub 4}Cys{sub 11} based on the presence of 20 cysteines split into two isolated regions of the sequence with 11 cysteines in the N-terminal and 9 cysteines in the C-terminal. The CD spectrum reported is distinctly different from any other metallothionein known suggesting quite different binding site structure for the peptide.

Ngu, Thanh T. [Department of Chemistry, University of Western Ontario, London, Ont., N6A 5B7 (Canada); Sturzenbaum, Stephen R. [School of Biomedical and Health Sciences, King's College, London, SE1 9NH (United Kingdom); Stillman, Martin J. [Department of Chemistry, University of Western Ontario, London, Ont., N6A 5B7 (Canada)]. E-mail: Martin.Stillman@uwo.ca

2006-12-08T23:59:59.000Z

459

Configuration mixing within the energy density functional formalism: pathologies and cures  

E-Print Network [OSTI]

Configuration mixing calculations performed in terms of the Skyrme/Gogny Energy Density Functional (EDF) rely on extending the Single-Reference energy functional into non-diagonal EDF kernels. The standard way to do so, based on an analogy with the pure Hamiltonian case and the use of the generalized Wick theorem, is responsible for the recently observed divergences and steps in Multi-Reference calculations. We summarize here the minimal solution to this problem recently proposed [Lacroix et al, arXiv:0809.2041] and applied with success to particle number restoration[Bender et al, arXiv:0809.2045]. Such a regularization method provides suitable corrections of pathologies for EDF depending on integer powers of the density. The specific case of fractional powers of the density[Duguet et al, arXiv:0809.2049] is also discussed.

Denis Lacroix; Michael Bender; Thomas Duguet

2008-11-17T23:59:59.000Z

460

Baseline LHC machine parameters and configuration of the 2015 proton run  

E-Print Network [OSTI]

This paper shows the baseline LHC machine parameters for the 2015 start-up. Many systems have been upgraded during LS1 and in 2015 the LHC will operate at a higher energy than before and with a tighter filling scheme. Therefore, the 2015 commissioning phase risks to be less smooth than in 2012. The proposed starting configuration puts the focus on feasibility rather than peak performance and includes margins for operational uncertainties. Instead, once beam experience and a better machine knowledge has been obtained, a push in $\\beta^*$ and performance can be envisaged. In this paper, the focus is on collimation settings and reach in $\\beta^*$---other parameters are covered in greater depth by other papers in these proceedings.

R. Bruce; G. Arduini; S. Fartoukh; M. Giovannozzi; M. Lamont; E. Metral; T. Pieloni; S. Redaelli; J. Wenninger

2014-10-22T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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

Overview of C-2 field-reversed configuration experiment plasma diagnostics  

SciTech Connect (OSTI)

A comprehensive diagnostic suite for field-reversed configuration (FRC) plasmas has been developed and installed on the C-2 device at Tri Alpha Energy to investigate the dynamics of FRC formation as well as to understand key FRC physics properties, e.g., confinement and stability, throughout a discharge. C-2 is a unique, large compact-toroid merging device that produces FRC plasmas partially sustained for up to ?5 ms by neutral-beam (NB) injection and end-on plasma-guns for stability control. Fundamental C-2 FRC properties are diagnosed by magnetics, interferometry, Thomson scattering, spectroscopy, bolometry, reflectometry, and NB-related fast-ion/neutral diagnostics. These diagnostics (totaling >50 systems) are essential to support the primary goal of developing a deep understanding of NB-driven FRCs.

Gota, H., E-mail: hgota@trialphaenergy.com; Thompson, M. C.; Tuszewski, M.; Binderbauer, M. W. [Tri Alpha Energy, Inc., Rancho Santa Margarita, California 92688 (United States)

2014-11-15T23:59:59.000Z

462

A new high performance field reversed configuration operating regime in the C-2 device  

SciTech Connect (OSTI)

Large field reversed configurations (FRCs) are produced in the C-2 device by combining dynamic formation and merging processes. The good confinement of these FRCs must be further improved to achieve sustainment with neutral beam (NB) injection and pellet fuelling. A plasma gun is installed at one end of the C-2 device to attempt electric field control of the FRC edge layer. The gun inward radial electric field counters the usual FRC spin-up and mitigates the n = 2 rotational instability without applying quadrupole magnetic fields. Better plasma centering is also obtained, presumably from line-tying to the gun electrodes. The combined effects of the plasma gun and of neutral beam injection lead to the high performance FRC operating regime, with FRC lifetimes up to 3 ms and with FRC confinement times improved by factors 2 to 4.

Tuszewski, M.; Smirnov, A.; Thompson, M. C.; Barnes, D.; Binderbauer, M. W.; Brown, R.; Bui, D. Q.; Clary, R.; Conroy, K. D.; Deng, B. H.; Dettrick, S. A.; Douglass, J. D.; Garate, E.; Glass, F. J.; Gota, H.; Guo, H.Y.; Gupta, D.; Gupta, S.; Kinley, J. S.; Knapp, K. [Tri Alpha Energy, Inc., P.O. Box 7010, Rancho Santa Margarita, California 92688 (United States); and others

2012-05-15T23:59:59.000Z

463

Modulated active charge exchange fast ion diagnostic for the C-2 field-reversed configuration experiment  

SciTech Connect (OSTI)

A diagnostic technique for measuring the fast-ion energy distribution in a field-reversed configuration plasma was developed and tested on the C-2 experiment. A deuterium neutral beam modulated at 22 kHz is injected into the plasma, producing a localized charge-exchange target for the confined fast protons. The escaping fast neutrals are detected by a neutral particle analyzer. The target beam transverse size ({approx}15 cm) defines the spatial resolution of the method. The equivalent current density of the target beam is {<=}0.15 A/cm{sup 2}, which corresponds to a neutral density ({approx}6 Multiplication-Sign 10{sup 9} cm{sup -3}) that highly exceeds the background neutral density in the core of C-2. The deuterium fast-ions due to the target beam (E{approx}27 keV), are not confined in C-2 and thus make a negligible contribution to the measured signals.

Korepanov, S.; Smirnov, A.; Clary, R.; Dettrick, S. [Tri Alpha Energy, Inc., Rancho Santa Margarita, California 92688 (United States); Deichuli, P.; Kondakov, A.; Murakhtin, S. [Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)

2012-10-15T23:59:59.000Z

464

Multi-channel Doppler backscattering measurements in the C-2 field reversed configuration  

SciTech Connect (OSTI)

A versatile heterodyne Doppler Backscattering (DBS) system is used to measure density fluctuation levels (in the wavenumber range k?{sub s} ? 50), and the toroidal E × B flow velocity in the C-2 Field-Reversed Configuration (FRC). Six tunable frequencies in three waveguide bands (26 GHz ? f ? 90 GHz) are launched using monostatic beam optics, via a quasi-optical beam combiner/polarizer and an adjustable parabolic focusing mirror (inside the vacuum enclosure) achieving Gaussian beam spot sizes of 3–5.5 cm at the X/O-mode cutoff. The DBS system covers plasma densities of 0.8 × 10{sup 13} ? n{sub e} ? 1 × 10{sup 14} cm{sup ?3}, and provides access to the FRC core (up to the field null) and across the FRC separatrix into the scrape-off layer plasma.

Schmitz, L., E-mail: lschmitz@ucla.edu; Peebles, W. A. [Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095 (United States); Ruskov, E. [Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697 (United States); Deng, B. H.; Gota, H.; Gupta, D.; Tuszewski, M.; Douglass, J.; Binderbauer, M.; Tajima, T. [Tri Alpha Energy, Inc., P.O. Box 7010, Rancho Santa Margarita, California 92688 (United States)

2014-11-15T23:59:59.000Z

465

Lithium isotopes within the ab intio no-core full configuration approach  

E-Print Network [OSTI]

We perform no-core full configuration calculations for the Lithium isotopes, 6Li, 7Li, and 8Li with the realistic nucleon-nucleon interaction JISP16. We obtain a set of observables, such as spectra, radii, multipole moments, transition rates, etc., and compare with experiment where available. We also present one-body density distributions for selected states. Convergence properties of these density distributions shed light on the convergence properties of one-body observables. We obtain underbinding by 0.5 MeV, 0.7 MeV, and 1.0 MeV for 6Li, 7Li, 8Li respectively. Magnetic moments are well-converged and agree with experiment to within 20%.

Chase Cockrell; James P. Vary; Pieter Maris

2012-09-14T23:59:59.000Z

466

Lithium isotopes within the ab intio no-core full configuration approach  

E-Print Network [OSTI]

We perform no-core full configuration calculations for the Lithium isotopes, 6Li, 7Li, and 8Li with the realistic nucleon-nucleon interaction JISP16. We obtain a set of observables, such as spectra, radii, multipole moments, transition rates, etc., and compare with experiment where available. We also present one-body density distributions for selected states. Convergence properties of these density distributions shed light on the convergence properties of one-body observables. We obtain underbinding by 0.5 MeV, 0.7 MeV, and 1.0 MeV for 6Li, 7Li, 8Li respectively. Magnetic moments are well-converged and agree with experiment to within 20%.

Cockrell, Chase; Maris, Pieter

2012-01-01T23:59:59.000Z

467

Improvement of the magnetic configuration in the reversed field pinch through successive bifurcations  

SciTech Connect (OSTI)

The reversed field pinch (RFP) is a magnetic configuration alternative to the tokamak that can be considered for a second generation of reactors. In this paper new remarkable results obtained in the RFP experiment RFX-mod are presented, showing that an internal transport barrier delimitates a large fraction of the plasma volume in a RFP when the current is raised to {approx}1.5 MA. The formation of this transport barrier is related to a profound, spontaneous modification of the magnetic topology. Due to the occurrence of a saddle node bifurcation the plasma enters in the single helical axis state, which is theoretically known to be more resilient to chaos. This bifurcation is driven by the amplitude of the helical perturbation which dominates the mode spectrum.

Lorenzini, R.; Agostini, M.; Alfier, A.; Antoni, V.; Apolloni, L.; Auriemma, F.; Barana, O.; Baruzzo, M.; Bettini, P.; Bonfiglio, D.; Bolzonella, T.; Bonomo, F.; Brombin, M.; Buffa, A.; Canton, A.; Cappello, S.; Carraro, L.; Cavazzana, R.; Chitarin, G.; Dal Bello, S. [Consorzio RFX, Associazione EURATOM-Enea sulla Fusione, corso Stati Uniti 4, I-35127 Padova (Italy)] (and others)

2009-05-15T23:59:59.000Z

468

A Comparison of Supercritical Carbon Dioxide Power Cycle Configurations with an Emphasis on CSP Applications (Presentation)  

SciTech Connect (OSTI)

Recent research suggests that an emerging power cycle technology using supercritical carbon dioxide (s-CO2) operated in a closed-loop Brayton cycle offers the potential of equivalent or higher cycle efficiency versus supercritical or superheated steam cycles at temperatures relevant for CSP applications. Preliminary design-point modeling suggests that s-CO2 cycle configurations can be devised that have similar overall efficiency but different temperature and/or pressure characteristics. This paper employs a more detailed heat exchanger model than previous work to compare the recompression and partial cooling cycles, two cycles with high design-point efficiencies, and illustrates the potential advantages of the latter. Integration of the cycles into CSP systems is studied, with a focus on sensible heat thermal storage and direct s-CO2 receivers. Results show the partial cooling cycle may offer a larger temperature difference across the primary heat exchanger, thereby potentially reducing heat exchanger cost and improving CSP receiver efficiency.

Neises, T.; Turchi, C.

2013-09-01T23:59:59.000Z

469

Elastic energy and string configurations in the chiral gauge theory of biaxial uniaxial nematic phase transitions  

E-Print Network [OSTI]

In nematic liquid crystals (NLCs), topological defects of a chiral origin play a role in phase transitions and lead to phase configurations of nontrivial topology, like those in neutron stars and helium in the A-phase. In the biaxial-uniaxial phase transition, the deformation of the orbit, as the order parameter degeneracy of the NLC, connects together an evolution of topological defects, the surface anchoring energy and elastic Frank modui. In this work we estimate the chiral gauge field presentation of the constrained Ladnau-de Gennes theory of the biaxial nematics, which have to explain their topologically dependent phase transformation, using the description of the transformation of disclinations in the biaxial nematic phase into the surface bojooms of a uniaxial NLC.

L. V. Elnikova

2014-10-09T23:59:59.000Z

470

EFFECT OF ELECTROLYZER CONFIGURATION AND PERFORMANCE ON HYBRID SULFUR PROCESS NET THERMAL EFFICIENCY  

SciTech Connect (OSTI)

Hybrid Sulfur cycle is gaining popularity as a possible means for massive production of hydrogen from nuclear energy. Several different ways of carrying out the SO{sub 2}-depolarized electrolysis step are being pursued by a number of researchers. These alternatives are evaluated with complete flowsheet simulations and on a common design basis using Aspen Plus{trademark}. Sensitivity analyses are performed to assess the performance potential of each configuration, and the flowsheets are optimized for energy recovery. Net thermal efficiencies are calculated for the best set of operating conditions for each flowsheet and the results compared. This will help focus attention on the most promising electrolysis alternatives. The sensitivity analyses should also help identify those features that offer the greatest potential for improvement.

Gorensek, M

2007-03-16T23:59:59.000Z

471

Non-local kinetic transport studies of a Field-Reversed Configuration  

SciTech Connect (OSTI)

A computer code was developed and tested, during this past period, to determine the global, linear kinetic stability of a one-dimensional Field-Reversed Configuration (FRC). A difficulty in verifying the code for fully electromagnetic perturbations caused the model to be simplified so that it would be easier to verify. The changes in the model were going from a fully electromagnetic field operator to an electrostatic field operator. The resultant simplifications allowed the code to be tested against well-known, analytic results from elementary plasma physics. This report will review the physical assumptions used to model the plasma and describe the extra assumptions inherent in using an electrostatic model. In addition, the rationale for simplifying the model and the results of the test of the model will be presented.

Choi, Chan K.

1991-01-01T23:59:59.000Z

472

Geothermal Casimir phenomena for the sphere-plate and cylinder-plate configurations  

E-Print Network [OSTI]

We investigate the nontrivial interplay between geometry and temperature in the Casimir effect for the sphere-plate and cylinder-plate configurations. At low temperature, the thermal contribution to the Casimir force is dominated by this interplay, implying that standard approximation techniques such as the PFA are inapplicable even in the limit of small surface separation. Thermal fluctuations on scales of the thermal wavelength lead to a delocalization of the thermal force density at low temperatures. As a consequence, the temperature dependence strongly differs from naive expectations. Most prominently, thermal forces can develop non-monotonic behavior below a critical temperature. We perform a comprehensive study of such geothermal phenomena in these Casimir geometries, using analytical and numerical worldline techniques for Dirichlet scalar fluctuations.

Alexej Weber; Holger Gies

2010-03-17T23:59:59.000Z

473

Study of nuclear pairing with Configuration-Space Monte-Carlo approach  

E-Print Network [OSTI]

Pairing correlations in nuclei play a decisive role in determining nuclear drip-lines, binding energies, and many collective properties. In this work a new Configuration-Space Monte-Carlo (CSMC) method for treating nuclear pairing correlations is developed, implemented, and demonstrated. In CSMC the Hamiltonian matrix is stochastically generated in Krylov subspace, resulting in the Monte-Carlo version of Lanczos-like diagonalization. The advantages of this approach over other techniques are discussed; the absence of the fermionic sign problem, probabilistic interpretation of quantum-mechanical amplitudes, and ability to handle truly large-scale problems with defined precision and error control, are noteworthy merits of CSMC. The features of our CSMC approach are shown using models and realistic examples. Special attention is given to difficult limits: situations with non-constant pairing strengths, cases with nearly degenerate excited states, limits when pairing correlations in finite systems are weak, and pr...

Lingle, Mark

2015-01-01T23:59:59.000Z

474

Geothermal Casimir phenomena for the sphere-plate and cylinder-plate configurations  

E-Print Network [OSTI]

We investigate the nontrivial interplay between geometry and temperature in the Casimir effect for the sphere-plate and cylinder-plate configurations. At low temperature, the thermal contribution to the Casimir force is dominated by this interplay, implying that standard approximation techniques such as the PFA are inapplicable even in the limit of small surface separation. Thermal fluctuations on scales of the thermal wavelength lead to a delocalization of the thermal force density at low temperatures. As a consequence, the temperature dependence strongly differs from naive expectations. Most prominently, thermal forces can develop non-monotonic behavior below a critical temperature. We perform a comprehensive study of such geothermal phenomena in these Casimir geometries, using analytical and numerical worldline techniques for Dirichlet scalar fluctuations.

Weber, Alexej

2010-01-01T23:59:59.000Z

475

Equilibrium configurations for quark-diquark stars and the problem of Her X-1 mass  

E-Print Network [OSTI]

We report new calculations of the physical properties of a quark-diquark plasma. A vacuum contribution is taken into account and is responsible for the appearance of a stable state at zero pressure and at a baryon density of about 2.2 times the nuclear matter density in this model. The resulting equation of state was used to integrate numerically the Tolman-Oppenheimer-Volkoff equations. The mass-radius relationship has been derived from a series of equilibrium configurations constituted by a mixture of quarks and diquarks. These stellar models, which are representative of a whole class, may be helpful to understand the possible compactness of the X-ray source Her X-1 and related objects.

J. E. Horvath; J. A. de Freitas Pacheco

1996-11-20T23:59:59.000Z

476

Models for the Configuration and Integrity of Partially Oxidized Fuel Rod Cladding at High Temperatures  

SciTech Connect (OSTI)

Models were designed to resolve deficiencies in the SCDAP/RELAP5/MOD3.2 calculations of the configuration and integrity of hot, partially oxidized cladding. These models are expected to improve the calculations of several important aspects of fuel rod behavior. First, an improved mapping was established from a compilation of PIE results from severe fuel damage tests of the configuration of melted metallic cladding that is retained by an oxide layer. The improved mapping accounts for the relocation of melted cladding in the circumferential direction. Then, rules based on PIE results were established for calculating the effect of cladding that has relocated from above on the oxidation and integrity of the lower intact cladding upon which it solidifies. Next, three different methods were identified for calculating the extent of dissolution of the oxidic part of the cladding due to its contact with the metallic part. The extent of dissolution effects the stress and thus the integrity of the oxidic part of the cladding. Then, an empirical equation was presented for calculating the stress in the oxidic part of the cladding and evaluating its integrity based on this calculated stress. This empirical equation replaces the current criterion for loss of integrity which is based on temperature and extent of oxidation. Finally, a new rule based on theoretical and experimental results was established for identifying the regions of a fuel rod with oxidation of both the inside and outside surfaces of the cladding. The implementation of these models is expected to eliminate the tendency of the SCDAP/RELAP5 code to overpredict the extent of oxidation of the upper part of fuel rods and to underpredict the extent of oxidation of the lower part of fuel rods and the part with a high concentration of relocated material. This report is a revision and reissue of the report entitled, Improvements in Modeling of Cladding Oxidation and Meltdown.

Siefken, L.J.

1999-01-01T23:59:59.000Z

477

ALTERNATE PADDLE CONFIGURATION FOR IMPROVED WEAR RESISTANCE IN THE SALTSTONE MIXER  

SciTech Connect (OSTI)

The Saltstone Production Facility has a 10-inch Readco-Kurimoto continuous mixer that mixes the premix dry feeds and low-level waste salt solution to make fresh (uncured) saltstone. Inspection of the mixer in January 2013 showed significant wear on the third, fourth and fifth paddle pairs after the conveying augers. A 2-inch Readco-Kurimoto continuous mixer was used to test alternate paddle configurations for use in the 10-inch mixer to decrease the wear rate on the paddles. Two wear tests were conducted to investigate a method of reducing wear on the mixer paddles. The first test (wear test 2a) had a paddle configuration similar to the currently installed 10-inch mixer in the SPF. This test established baseline wear. The second test (wear test 2b) had a reconfigured paddle arrangement that replaced the flat paddles with helical paddles for paddle pairs 2 ? 6 and aligned paddle pair 1 with the augers. The intent of the reconfiguration was to more effectively convey the partially wetted dry feeds through the transition region and into the liquid feed where paddle wear is reduced due to dry feeds and salt solution being mixed at the intended water to premix ratio. The design of the helical paddles provides conveyance through the transition region to the liquid feed inlet. The alignment with the auger is aimed to provide a smoother transition (minimizing the discontinuity between the auger and paddle pair 1) into the downstream paddles. A soft metal with low wear resistance (6000 series aluminum) was used for the wear testing paddles to determine wear patterns while minimizing run time and maximizing wear rate. For the two paddle configurations tested using the scaled 2-inch Readco-Kurimoto continuous mixer, with the first six paddles after the augers replaced by the wear paddles and the remaining paddles were stainless steel. Since the 10-inch SPF mixer is designed with the liquid inlet centered over paddle pairs 5 and 6, the scaled 2-inch mixer was configured the same way. The wear rate from wear test 2a was approximately double the wear rate from wear test 2b for paddle pairs 4 and 5. For both configurations, there was little or no wear on paddle pairs 1, 2, 3 and 6 based on mass change, indicating that the un-wetted and fully wetted premix materials cause less wear than the partially wetted premix. Additionally, inspection of the wear surface of the paddles showed more deformation on the flat paddles than the helical paddles which was consistent with the wear rates. Aligning of the auger discharge flight with paddle pair 1 resulted in a lower wear rate paddle pair 1 rather than having them misaligned with the feed augers. During the paddle wear tests, polishing wear was observed on the inside barrel of the mixer. The polishing wear is evident on the upper housing clamshell and the lower housing clamshell primarily at paddle pairs 4 and 5, which is the transition region of the mixer. Wear on the mixer barrel increases the space between the paddles and the barrel, resulting in increased grout build up on the barrel. Since the mixer barrel cannot be reconfigured or replaced in the SPF, the method for mitigating wear on the barrel is to move the more viscous grout through the transition region as quickly as possible. In addition, the location of the liquid inlet does not allow for sufficient cleaning of the mixer since residual grout remains on paddle pairs 1 ? 4. As the paddles continue to wear and the self-cleaning capability of the paddles is lost, the lack of sufficient flushing would aid in grout build up between the barrel and the paddles which could eventually lead to decreased throughput capacity of the dry feeds. Changing the paddle configuration from flat to helical resulted in no change to the rheological properties of the grout mixture. Both tests produced a grout that is within the processing range of the SPF. Based on the results of this testing, it is recommended for the currently installed SPF mixer that paddle pairs 1 through 6 be helical rather than flat, with the paddle pair 1 aligned with the feed au

Reigel, M.; Fowley, M.

2013-09-23T23:59:59.000Z

478

Final Report for grant DE-FG02-06ER54888, "Simulation of Beam-Electron Cloud Interactions in Circular Accelerators Using Plasma Models"  

SciTech Connect (OSTI)

The primary goal of this collaborative proposal was to modify the code QuickPIC and apply it to study the long-time stability of beam propagation in low density electron clouds present in circular accelerators. The UCLA contribution to this collaborative proposal was in supporting the development of the pipelining scheme for the QuickPIC code, which extended the parallel scaling of this code by two orders of magnitude.

Decyk, Viktor K.

2012-11-27T23:59:59.000Z

479

Fluid Systems For the system in Figure 1.1, the pipe is circular and has length L and diameter d. The fluid  

E-Print Network [OSTI]

Fluid Systems QUESTION 1 For the system in Figure 1.1, the pipe is circular and has length L the system dynamics. A1 pa pa A2 pa k2, 2 k3, 3 k1, 1 wi(t) pipe Figure 1.1 #12;Fluid Systems 2 QUESTION 2 For the system in Figure 2.1, the pipe has length L and area Ap. Half way along the pipe is a flexible container

Landers, Robert G.

480

Evolutionary outcomes for pairs of planets undergoing orbital migration and circularization: second order resonances and observed period ratios in Kepler's planetary systems  

E-Print Network [OSTI]

In order to study the origin of the architectures of low mass planetary systems, we perform numerical surveys of the evolution of pairs of coplanar planets in the mass range $(1-4)\\ \\rmn{M}_{\\oplus}.$ These evolve for up to $2\\times10^7 \\rmn{yr}$ under a range of orbital migration torques and circularization rates assumed to arise through interaction with a protoplanetary disc. Near the inner disc boundary, significant variations of viscosity, interaction with density waves or with the stellar magnetic field could occur and halt migration, but allow ircularization to continue. This was modelled by modifying the migration and circularization rates. Runs terminated without an extended period of circularization in the absence of migration torques gave rise to either a collision, or a system close to a resonance. These were mostly first order with a few $\\%$ terminating in second order resonances. Both planetary eccentricities were small $< 0.1$ and all resonant angles liberated. This type of survey produced o...

Xiang-Gruess, M

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "in-plane circular configuration" 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.


481

Light Water Reactor Sustainability Program Technical Basis Guide Describing How to Perform Safety Margin Configuration Risk Management  

SciTech Connect (OSTI)

The INL has carried out a demonstration of the RISMC approach for the purpose of configuration risk management. We have shown how improved accuracy and realism can be achieved by simulating changes in risk – as a function of different configurations – in order to determine safety margins as the plant is modified. We described the various technical issues that play a role in these configuration-based calculations with the intent that future applications can take advantage of the analysis benefits while avoiding some of the technical pitfalls that are found for these types of calculations. Specific recommendations have been provided on a variety of topics aimed at improving the safety margin analysis and strengthening the technical basis behind the analysis process.

Curtis Smith; James Knudsen; Bentley Harwood

2013-08-01T23:59:59.000Z

482

Proposal to negotiate a collaboration agreement related to the application of novel cavity fabrication techniques and Nb/Cu sputter coating technology in the field of superconducting RF for the Future Circular Collider (FCC) study  

E-Print Network [OSTI]

Proposal to negotiate a collaboration agreement related to the application of novel cavity fabrication techniques and Nb/Cu sputter coating technology in the field of superconducting RF for the Future Circular Collider (FCC) study

2015-01-01T23:59:59.000Z

483

Test VLPC Cryostat: Programming and Configuration of Cryogenic and Temperature Instruments  

SciTech Connect (OSTI)

Currently, Fermi National Accelerator Laboratory is in the midst of a site wide upgrade. Here at D-Zero, one of the components of this upgrade will be the construction of two 48 cassette VLPC cryostats which will be the heart of the new magnetic central fiber tracker. A VLPC or Visible Light Photon Counter is a device that allows physicists to more accurately calculate the origins of particles ejected during a proton - anti-proton collision in the detector. Inside the detector is an optical fiber barrel which surrounds the collision point. When an ejected particle strikes a fiber the result is the release of photons which travel along the fiber until they reach the bottom of a cassette hitting the VLPC chip. These impacts result in voltages which are read by the VLPC chips and sent to the computer for future analysis. From these voltages, physicists can determine the origins of the particles, their charges, their speeds and other information as well. Within the last few months a test VLPC bas been built at D-Zero. This VLPC is comprised of four rectangular cassettes each equipped with heating elements, RTDs and 1024 VLPC chips. This particular configuration is unique here at Fermilab. Other VLPC cryostats that have been built were usually cylindrical in their geometry. The purpose of this test VLPC is to have on hand a reliable model to aid in understanding the complexities involved in running such devices at approximately 10K, as well as to prepare for the eventual 48 cassette VLPCs to come. In particular, an important aspect of this test phase is to check the engineering involved so that the final cryostats are designed correctly. Also, this test cryostat will enable us to check each of the cassettes to be used in the final cryostat and correct any problems before hand. This engineering note has been written in order to describe the setup of the VLPC as it pertains to the programming, configuration and control of all of the cryogenic and temperature instruments. These instruments include the two pneumatic valves, the pressure transmitter, heating elements of the cassettes, and the various RIDs scattered throughout.

Zaczek, M.; /Fermilab

1997-08-11T23:59:59.000Z

484

A shape identification problem in estimating time-dependent irregular boundary configurations  

SciTech Connect (OSTI)

A transient inverse geometry heat conduction problem (shape identification problem) by using the conjugate gradient method (CGM) and boundary element method (BEM)-based inverse algorithm is solved in the present study to estimate the unknown irregular boundary shape. In the previous work by Huang and Chao (1997), the steady-state shape identification problem has been solved successfully by using both the Levenberg-Marquadt method and conjugate gradient method. They concluded that the conjugate gradient method is better than the Levenberg-Marquardt method especially when the number of unknowns are increased. In this present extended work only the conjugate gradient method is considered since the Levenberg-Marquardt method is of no hope to solve this inverse transient shape identification problem. Results obtained by using conjugate gradient to solve this inverse moving boundary problems are justified based on the numerical experiments. One concludes that the accurate configuration can be estimated by conjugate gradient method except for the initial and final time. The reason and improvement of this singularity will be addressed in text. Finally the effects of the measurement errors to the inverse solutions are discussed.

Huang, C.H.; Tsai, C.C.

1997-07-01T23:59:59.000Z

485

Tomographic imaging system for measuring impurity line emission in a field-reversed configuration  

SciTech Connect (OSTI)

A 16 chord optical tomography system has been developed and implemented in the flux coil generated-field reversed configuration (FRC). The chords are arranged in two fans of eight, which cover {approx}35% of the vessel area at the midplane. Each illuminate separate photomultiplier tubes (PMTs) which are fitted with narrow band-pass filters. In this case, filters are centered at 434.8 nm to measure emission from singly ionized argon. PMT crosstalk is negligible. Background noise due to electron radiation and H{sub {gamma}} line radiation is <10% of argon emission. The spatial resolution of the reconstruction is 1.5 cm. Argon is introduced using a puff valve and tube designed to impart the gas into the system as the FRC is forming. Reconstruction of experimental data results in time-dependent, 2D emissivity profiles of the impurity ions. Analysis of these data show radial, cross-field diffusion to be in the range of 10-10{sup 3} m{sup 2}/s during FRC equilibrium.

Roche, T.; Heidbrink, W. W.; McWilliams, R. [University of California, Irvine, California 92697 (United States); Bolte, N.; Garate, E.; Wessel, F. [University of California, Irvine, California 92697 (United States); Tri Alpha Energy, Inc., Rancho Santa Margarita, California 92688 (United States)

2012-10-15T23:59:59.000Z

486

Langmuir probe diagnostic suite in the C-2 field-reversed configuration  

SciTech Connect (OSTI)

Several in situ probes have been designed and implemented into the diagnostic array of the C-2 field-reversed configuration (FRC) at Tri Alpha Energy [M. Tuszewski et al. (the TAE Team), Phys. Rev. Lett. 108, 255008 (2012)]. The probes are all variations on the traditional Langmuir probe. They include linear arrays of triple probes, linear arrays of single-tipped swept probes, a multi-faced Gundestrup probe, and an ion-sensitive probe. The probes vary from 5 to 7 mm diameter in size to minimize plasma perturbations. They also have boron nitride outer casings that prevent unwanted electrical breakdown and reduce the introduction of impurities. The probes are mounted on motorized linear-actuators allowing for programmatic scans of the various plasma parameters over the course of several shots. Each probe has a custom set of electronics that allows for measurement of the desired signals. High frequency ( > 5MHz) analog optical-isolators ensure that plasma parameters can be measured at sub-microsecond time scales while providing electrical isolation between machine and data acquisition systems. With these probes time-resolved plasma parameters (temperature, density, spatial potential, flow, and electric field) can be directly/locally measured in the FRC jet and edge/scrape-off layer.

Roche, T., E-mail: troche@trialphaenergy.com; Armstrong, S.; Knapp, K.; Slepchenkov, M. [Tri Alpha Energy Inc., PO Box 7010, Rancho Santa Margarita, California 92688 (United States); Sun, X. [Department of Modern Physics, University of Science and Technology of China, Hefei Anhui 230026 (China)

2014-11-15T23:59:59.000Z

487

RFX-mod: A multi-configuration fusion facility for three-dimensional physics studies  

SciTech Connect (OSTI)

RFX-mod [Sonato et al., Fusion Eng. Des. 66, 161 (2003)] exploits its 192 active coils in both reversed-field pinch (RFP) and tokamak configurations with varying degrees of 3D shaping, providing also a test bed for validating stellarator codes and 3D nonlinear magnetohydrodynamic codes. This makes RFX-mod a unique and flexible facility for comparative studies on 3D shaping and control. The paper discusses how 3D fields allow access to RFP and tokamak advanced regimes. 3D fields are used to feedback control Single Helicity (SH) RFP equilibria with 1/7 helicity up to ?2 MA. They also allow accessing SH regimes with higher density (Greenwald fraction up to 0.5), presently inaccessible in spontaneous SH regimes. Feedback on the 2/1 resistive-wall mode in RFX-mod tokamak plasmas allows for safe operation at q(a)<2, an almost unexplored promising regime. Forcing the 2/1 mode to saturate at finite but small level, a helical tokamak equilibrium with significant n = 1 modulation is produced and a new way to tailor sawteeth is found. The effects of different levels of 3D shaping on momentum transport in both RFP and tokamak helical states are discussed.

Piovesan, P.; Bonfiglio, D.; Auriemma, F.; Bonomo, F.; Carraro, L.; Cavazzana, R.; De Masi, G.; Fassina, A.; Franz, P.; Gobbin, M.; Marrelli, L.; Martin, P.; Martines, E.; Momo, B.; Piron, L.; Valisa, M.; Veranda, M.; Vianello, N.; Zaniol, B.; Agostini, M. [Consorzio RFX, EURATOM-ENEA Association, Corso Stati Uniti 4, 35127 Padova (Italy)] [Consorzio RFX, EURATOM-ENEA Association, Corso Stati Uniti 4, 35127 Padova (Italy); and others

2013-05-15T23:59:59.000Z

488

A novel proportional--integral-derivative control configuration with application to the control of batch distillation  

SciTech Connect (OSTI)

The aim of this paper is to propose a novel proportional-integral-derivative (PID) control configuration based on an observer structure. Batch distillation is used as the base case study where the regulated output is the distillate composition. The proposed PID control law is derived in the framework of robust nonlinear control with modeling error compensation techniques. A reduced-order observer is proposed to estimate both the derivative of the regulated output and the underlying modeling error. These observations are subsequently used in a control loop to feedback variations of distillate composition (derivative feedback) and to counteract the effects of modeling errors. It is shown that, under certain conditions, the resulting control law is equivalent to a classical PID controller with an antireset windup scheme. Moreover, the tuning of the controller is performed very easily in terms of a prescribed closed-loop time constant and an estimation time constant. Numerical results are provided for binary and multicomponent separations. Sampled/delayed measurements and several sources of uncertainties are considered in order to provide a realistic test scenario for the proposed control design procedure.

Alvarez-Ramirez, J.; Monroy-Loperena, R.; Cervantes, I.; Morales, A.

2000-02-01T23:59:59.000Z

489

Dye laser amplifier including an improved window configuration for its dye beam  

DOE Patents [OSTI]

A dye laser amplifier in which a continuously replenished supply of dye is excited with a first light beam in order to amplify the intensity of a second different light beam passing therethrough is disclosed herein. This amplifier includes a cell though which a continuous stream of the dye is caused to pass, and means for directing the first beam into the cell while the second beam is directed into and through the same cell. There is also disclosed herein a specific improvement to this amplifier which resides in the use of a pair of particularly configured windows through which the second beam passes along fixed paths as the second beam enters and exits the dye cell. Each of these windows has a relatively thick main section which is substantially larger in dimensions transverse to its beam path than the cross section of the second beam itself, whereby to add structural integrity to the overall window. At the same time, the latter includes a second section which is disposed entirely within the confines of the main section and through which the second beam is intended to pass in its entirety. This second section is made substantially thinner than the main section in order to reduce optical distortion as the second beam passes therethrough.

O'Neil, Richard W. (Pleasanton, CA); Davin, James M. (Livermore, CA)

1992-01-01T23:59:59.000Z

490

Dye laser amplifier including an improved window configuration for its dye beam  

DOE Patents [OSTI]

A dye laser amplifier in which a continuously replenished supply of dye is excited with a first light beam in order to amplify the intensity of a second different light beam passing therethrough is disclosed herein. This amplifier includes a cell though which a continuous stream of the dye is caused to pass, and means for directing the first beam into the cell while the second beam is directed into and through the same cell. There is also disclosed herein a specific improvement to this amplifier which resides in the use of a pair of particularly configured windows through which the second beam passes along fixed paths as the second beam enters and exits the dye cell. Each of these windows has a relatively thick main section which is substantially larger in dimensions transverse to its beam path than the cross section of the second beam itself, whereby to add structural integrity to the overall window. At the same time, the latter includes a second section which is disposed entirely within the confines of the main section and through which the second beam is intended to pass in its entirety. This second section is made substantially thinner than the main section in order to reduce optical distortion as the second beam passes therethrough. 4 figs.

O'Neil, R.W.; Davin, J.M.

1992-12-01T23:59:59.000Z

491

Femtoscopically Probing the Freeze-out Configuration in Heavy Ion Collisions  

E-Print Network [OSTI]

Two-particle femtoscopy reveals the space-time substructure of the freeze-out configuration from heavy ion collisions. Detailed fingerprints of bulk collectivity are evident in space-momentum correlations, which have been systematically measured as a function of particle type, three-momentum, and collision conditions. A clear scenario, dominated by hydrodynamic-type flow emerges. Reproducing the strength and features of the femtoscopic signals in models involves important physical quantities like the Equation of State, as well as less fundamental technical details. An interesting approximate "factorization" in the measured systematics suggests that the overall physical freeze-out scale is set by final state chemistry, but the kinematic substructure is largely universal. Referring to previous results from hadron and lepton collisions, we point to the importance of determining whether these "universal" trends persist from the largest to the smallest systems. We review theoretical expectations for heavy ion femtoscopy at the LHC, and point to directions needing further theory and experimental work at RHIC and the LHC.

Michael Annan Lisa; Scott Pratt

2009-10-02T23:59:59.000Z

492

POLYMER ELECTROLYTE MEMBRANE ELECTROLYZER OPERATION WITH VARYING INLET WATER FEED CONFIGURATIONS  

SciTech Connect (OSTI)

Proton Exchange Membrane (PEM) electrolysis is a potential alternative technology to crack water in specialty applications where a dry gas stream is needed, such as isotope production. One design proposal is to feed the cathode of the electrolyzer with vapor phase water. This feed configuration would allow isotopic water to be isolated on the cathode side of the electrolyzer and the isotope recovery system could be operated in a closed loop. Tests were performed to characterize the difference in the current-voltage behavior between a PEM electrolyzer operated with a cathode water vapor feed and with an anode liquid water feed. The cathode water vapor feed cell had a maximum limiting current density of 100 mA/cm2 at 70 C compared to a current density of 800 mA/cm2 for the anode liquid feed cell at 70 C. The limiting current densities for the cathode water vapor feed cell were approximately 3 times lower than predicted by a water mass transfer model. It is estimated that a cathode water vapor feed electrolyzer system will need to be between 8-14 times larger in active area or number of cells than an anode liquid feed system.

Fox, E

2008-09-12T23:59:59.000Z

493

A multi-point laser Doppler vibrometer with fiber-based configuration  

SciTech Connect (OSTI)

Laser Doppler vibrometer (LDV) is a non-contact optical interferometric system to measure vibrations of structures and machines with a high precision. Normal LDV can only offer a single-point measurement. Scanning LDV is usually impractical to do measurement on transient events. In this paper, a fiber-based self-synchronized multi-point LDV is proposed. The multiple laser beams with different frequency shifts are generated from one laser source. The beams are projected onto a vibrating object, reflected and interfered with a common reference beam. The signal including vibration information of multiple spatial points is captured by one single-pixel photodetector. The optical system is mainly integrated by fiber components for flexibility in measurement. Two experiments are conducted to measure a steady-state simple harmonic vibration of a cantilever beam and a transient vibration of a beam clamped at both ends. In the first measurement, a numerical interpolation is applied to reconstruct the mode shape with increased number of data points. The vibration mode obtained is compared with that from FEM simulation. In transient vibration measurement, the first five resonant frequencies are obtained. The results show the new-reported fiber-based multipoint LDV can offer a vibration measurement on various spatial points simultaneously. With the flexibility of fiber configuration, it becomes more practical for dynamic structural evaluation in industrial areas.

Yang, C. [Temasek Laboratories and School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553 (Singapore) [Temasek Laboratories and School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553 (Singapore); Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027 (China); Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900 (China); Guo, M.; Liu, H.; Yan, K.; Xu, Y. J.; Fu, Y., E-mail: fuyuoptics@gmail.com [Temasek Laboratories and School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553 (Singapore); Miao, H. [Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027 (China)] [Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027 (China)

2013-12-15T23:59:59.000Z

494

Risk and Work Configuration Management as a Function of Integrated Safety Management  

SciTech Connect (OSTI)

National Security Technologies, LLC (NSTec), has established a work management program and corresponding electronic Facilities and Operations Management Information System (e-FOM) to implement Integrated Safety Management (ISM). The management of work scopes, the identification of hazards, and the establishment of implementing controls are reviewed and approved through electronic signatures. Through the execution of the program and the implementation of the electronic system, NSTec staff work within controls and utilize feedback and improvement process. The Integrated Work Control Manual further implements the five functions of ISM at the Activity level. By adding the Risk and Work Configuration Management program, NSTec establishes risk acceptance (business and physical) for liabilities within the performance direction and work management processes. Requirements, roles, and responsibilities are specifically identified in the program while e-FOM provides the interface and establishes the flowdown from the Safety Chain to work and facilities management processes to company work-related directives, and finally to Subject Matter Expert concurrence. The Program establishes, within the defined management structure, management levels for risk identification, risk mitigation (controls), and risk acceptance (business and physical) within the Safety Chain of Responsibility. The Program also implements Integrated Safeguards and Security Management within the NSTec Safety Chain of Responsibility. Once all information has been entered into e-FOM, approved, and captured as data, the information becomes searchable and sortable by hazard, location, organization, mitigating controls, etc.

Lana Buehrer, Michele Kelly, Fran Lemieux, Fred Williams

2007-11-30T23:59:59.000Z

495

Facility Configuration Study of the High Temperature Gas-Cooled Reactor Component Test Facility  

SciTech Connect (OSTI)

A test facility, referred to as the High Temperature Gas-Cooled Reactor Component Test Facility or CTF, will be sited at Idaho National Laboratory for the purposes of supporting development of high temperature gas thermal-hydraulic technologies (helium, helium-Nitrogen, CO2, etc.) as applied in heat transport and heat transfer applications in High Temperature Gas-Cooled Reactors. Such applications include, but are not limited to: primary coolant; secondary coolant; intermediate, secondary, and tertiary heat transfer; and demonstration of processes requiring high temperatures such as hydrogen production. The facility will initially support completion of the Next Generation Nuclear Plant. It will secondarily be open for use by the full range of suppliers, end-users, facilitators, government laboratories, and others in the domestic and international community supporting the development and application of High Temperature Gas-Cooled Reactor technology. This pre-conceptual facility configuration study, which forms the basis for a cost estimate to support CTF scoping and planning, accomplishes the following objectives: • Identifies pre-conceptual design requirements • Develops test loop equipment schematics and layout • Identifies space allocations for each of the facility functions, as required • Develops a pre-conceptual site layout including transportation, parking and support structures, and railway systems • Identifies pre-conceptual utility and support system needs • Establishes pre-conceptual electrical one-line drawings and schedule for development of power needs.

S. L. Austad; L. E. Guillen; D. S. Ferguson; B. L. Blakely; D. M. Pace; D. Lopez; J. D. Zolynski; B. L. Cowley; V. J. Balls; E.A. Harvego, P.E.; C.W. McKnight, P.E.; R.S. Stewart; B.D. Christensen

2008-04-01T23:59:59.000Z

496

Investigation of ammonia equipment configurations for supermarket refrigeration applications (for microcomputers). Software  

SciTech Connect (OSTI)

This product gives results of a project to quantify the advantages and disadvantages of using ammonia with a secondary brine refrigerant compared to R-22 in supermarket refrigeration applications. Project objectives were achieved by numerical experiments using simulations. Mechanistic models of refrigeration system components were used, based on fundamental principles, accepted heat transfer/pressure drop correlations, and available manufacturers` data. Available thermodynamic and transport property data correlations for ammonia and R-22 were used in the models. The parameters of these models were varied to determine their effect on system performance and locate optimum values. A modular approach was used in which each component was separately modeled, allowing simple changes in system configurations. The combined component models resulted in a large set of coupled nonlinear algebraic equations for the quasi-steady systems that did not involve brine storage. The system involved differential and algebraic equations. These equations were solved using the general-purpose simulation programs EES and TRNSYS. EES is a robust nonlinear equation-solving program with built-in thermophysical property data. TRNSYS is a sequential modular simulation program that uses schemes to solve coupled algebraic and differential equations.

NONE

1995-02-01T23:59:59.000Z

497

Accounting for a feature of the configuration of the loops in the primary circuit of VVER-440 reactors  

SciTech Connect (OSTI)

A feature of the configuration of the loops of the primary circuit of VVER-440 reactors and its influence on the characteristics of the main circulation pumps are analyzed. It is proposed that differences in the characteristics of the main reactor circulation pumps be taken account during the design and operation of nuclear power plants.

Khazanov, A. L. [FBU 'Scientific and Engineering Center for Nuclear and Radiation Safety' (FBU 'NTTs YaRB') (Russian Federation)] [FBU 'Scientific and Engineering Center for Nuclear and Radiation Safety' (FBU 'NTTs YaRB') (Russian Federation)

2013-09-15T23:59:59.000Z

498

29.01.03.M1.13 Information Resources Network Configuration Page 1 of 3 STANDARD ADMINISTRATIVE PROCEDURE  

E-Print Network [OSTI]

29.01.03.M1.13 Information Resources ­ Network Configuration Page 1 of 3 STANDARD ADMINISTRATIVE to this infrastructure. 2. APPLICABILITY This Standard Administrative Procedure (SAP) applies to all University network.27 Exclusions from Required Risk Mitigation Measures. The intended audience is all network system administrators

499

Enhanced absorption Hanle effect in the configuration of crossed laser beam and magnetic field F. Renzoni,1,  

E-Print Network [OSTI]

modifications of the absorptive and dispersive properties of atomic media 2­4 , and are responsible for the sub that increases the atomic absorption 8,9 . The increased atomic absorption, denoted as electromagnetic induced abEnhanced absorption Hanle effect in the configuration of crossed laser beam and magnetic field F

500

Anode-supported thin-film fuel cells operated in a single chamber configuration 2T-I-12  

E-Print Network [OSTI]

on the anode, producing a complex response in fuel cell power output. Under optimized gas compositions and flowAnode-supported thin-film fuel cells operated in a single chamber configuration 2T-I-12 Zongping of anode-supported, thin-film, single chamber fuel cells (SCFCs) have been investigated. Cells, in which Ni

Haile, Sossina M.