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1

Steven Weinberg, Weak Interactions, and Electromagnetic Interactions  

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

Steven Weinberg and Steven Weinberg and Weak and Electromagnetic Interactions Resources with Additional Information Steven Weinberg Courtesy Dr. Steven Weinberg Steven "Weinberg is a professor of physics and astronomy at UT [The University of Texas] Austin and is founding director of the Theory Group in the College of Natural Sciences. [He is] well known for his development of a field theory that unifies the electromagnetic and weak nuclear forces, and for other major contributions to physics and cosmology ... Weinberg's work has been honored with numerous prizes, including the Nobel Prize in Physics in 1979 and the National Medal of Science in 1991. Weinberg is the author of the prize-winning book The First Three Minutes: A Modern View of the Origin of the Universe (which has been translated into 22 foreign languages) as well as Gravitation and Cosmology, The Discovery of Subatomic Particles, Dreams of a Final Theory and The Quantum Theory of Fields. ... Weinberg was the recipient of the Scientist as Poet prize from Rockefeller University for "extraordinary achievements in conveying - with passionate clarity - the ideas, history, explanatory power and aesthetic dimensions of fundamental physics." The citation mentioned two of Weinberg's books.

2

Summary of the Hadronic Weak Interaction session  

Science Conference Proceedings (OSTI)

We summarize and discuss present and future experiments on decays of light mesons and muons that were presented in the Hadronic Weak Interaction working group session of the ``Workshop on Future Directions in Particle and Nuclear Physics at Multi-GeV Hadron Facilities.`` Precise measurements and rare-decay searches, which sense mass scales in the 1--1000 TeV region, are discussed in the context of the standard model and beyond.

Bock, G. [Fermi National Accelerator Lab., Batavia, IL (United States); Bryman, D.A.; Numao, T. [British Columbia Univ., Vancouver, BC (Canada). TRIUMF Facility

1993-07-01T23:59:59.000Z

3

Spin effects in the weak interaction  

SciTech Connect

Modern experiments investigating the beta decay of the neutron and light nuclei are still providing important constraints on the theory of the weak interaction. Beta decay experiments are yielding more precise values for allowed and induced weak coupling constants and putting constraints on possible extensions to the standard electroweak model. Here we emphasize the implications of recent experiments to pin down the strengths of the weak vector and axial vector couplings of the nucleon.

Freedman, S.J. (Argonne National Lab., IL (USA) Chicago Univ., IL (USA). Dept. of Physics Chicago Univ., IL (USA). Enrico Fermi Inst.)

1990-01-01T23:59:59.000Z

4

Interaction between Lattice Dislocation and Weak Interface in ...  

Science Conference Proceedings (OSTI)

We studied the interaction between lattice dislocations and weak interfaces in anisotropic bi-layer composites by using the Green's function method.

5

The Perturbative Onset of Multiparticle Production in Weak Interactions  

E-Print Network (OSTI)

We use perturbation theory to estimate the energy scale beyond which multiparticle final states become a dominant feature of high energy weak interactions. Using estimates from a weak parton model and comparing two, three and four body final states we deduce that multiparticle states become important at energy scales in the range 10**7 - 10**9 GeV.

D. A. Morris; R. Rosenfeld

1992-10-19T23:59:59.000Z

6

DISCIPLE-1: interactive apprentice system in weak theory fields  

Science Conference Proceedings (OSTI)

The paper presents an interactive approach to learning apprentice systems for weak theory domains. The approach consists of a combination of teaming by analogy and learning by generalizing instances. One main point of this approach is that it uses the ...

Yves Kodratoff; Gheorghe Tecuci

1987-08-01T23:59:59.000Z

7

Nuclear Constraints on the Weak Nucleon-Nucleon Interaction  

E-Print Network (OSTI)

I discuss the current status of efforts to constrain the strangeness-conserving weak hadronic interaction, which can be isolated in nuclear systems because of the associated parity violation.

W. C. Haxton

2008-02-21T23:59:59.000Z

8

Gravitational Interaction of Higgs Boson and Weak Boson Scattering  

E-Print Network (OSTI)

With the LHC discovery of a 125 GeV Higgs-like boson, we study gravitational interaction of the Higgs boson via the unique dimension-4 operator involving Higgs doublet and scalar curvature, $\\,\\xi H^\\dag H R\\,$, with nonminimal coupling $\\,\\xi\\,$. This Higgs portal term can be transformed away in Einstein frame and induces gauge-invariant effective interactions in the Higgs sector. We study the weak boson scattering in Einstein frame, and explicitly demonstrate the longitudinal-Goldstone boson equivalence theorem in the presence of $\\,\\xi\\,$ coupling. With these, we derive unitarity bound on the Higgs gravitational coupling $\\,\\xi\\,$ in Einstein frame, which is stronger than that inferred from the current LHC Higgs measurements. We further study $\\xi$-dependent weak boson scattering cross sections at TeV scale, and propose a new LHC probe of the Higgs-gravity coupling $\\,\\xi\\,$ via weak boson scattering experiments.

Zhong-Zhi Xianyu; Jing Ren; Hong-Jian He

2013-05-01T23:59:59.000Z

9

Astrophysical weak-interaction processes and nuclear effective field theory  

E-Print Network (OSTI)

Low-energy nuclear weak-interaction processes play important roles in many astrophysical contexts, and effective field theory is believed to be a highly useful framework for describing these processes in a model-independent manner. I present a brief account of the basic features of the nuclear effective theory approach, and some examples of actual calculations carried out in this method.

K. Kubodera

2004-04-09T23:59:59.000Z

10

Microscopic scattering theory for interacting bosons in weak random potentials  

E-Print Network (OSTI)

We develop a diagrammatic scattering theory for interacting bosons in a three-dimensional, weakly disordered potential. Based on a microscopic N-body scattering theory, we identify the relevant diagrams including elastic and inelastic collision processes that are sufficient to describe diffusive quantum transport. By taking advantage of the statistical properties of the weak disorder potential, we demonstrate how the N-body dynamics can be reduced to a nonlinear integral equation of Boltzmann type for the single-particle diffusive flux. Our theory reduces to the Gross-Pitaevskii mean field description in the limit where only elastic collisions are taken into account. However, even at weak interaction strength, inelastic collisions lead to energy redistribution between the bosons - initially prepared all at the same single-particle energy - and thereby induce thermalization of the single-particle current. In addition, we include also weak localization effects and determine the coherent corrections to the incoherent transport in terms of the coherent backscattering signal. We find that inelastic collisions lead to an enhancement of the backscattered cone in a narrow spectral window for increasing interaction strength.

Tobias Geiger; Andreas Buchleitner; Thomas Wellens

2013-07-18T23:59:59.000Z

11

Coherent state of a weakly interacting ultracold Fermi gas  

E-Print Network (OSTI)

We examine the weakly interacting atoms in an ultracold Fermi gas leading to a state of macroscopic coherence, from a theoretical perspective. It has been shown that this state can be described as a fermionic coherent state. These coherent states are the eigenstates of fermionic annihilation operators, the eigenvalues being anti-commuting numbers or Grassmann numbers. By exploiting the simple rules of Grassmann algebra and a close kinship between relations evaluated for more familiar bosonic fields and those for fermionic fields, we derive the thermodynamic limit, the spontaneous symmetry breaking and the quasi-particle spectrum of the fermionic system.

Arnab Ghosh; Sudarson Sekhar Sinha; Deb Shankar Ray

2013-01-17T23:59:59.000Z

12

Weak Interaction Neutron Production Rates in Fully Ionized Plasmas  

E-Print Network (OSTI)

Employing the weak interaction reaction wherein a heavy electron is captured by a proton to produce a neutron and a neutrino, the neutron production rate for neutral hydrogen gases and for fully ionized plasmas is computed. Using the Coulomb atomic bound state wave functions of a neutral hydrogen gas, our production rate results are in agreement with recent estimates by Maiani {\\it et al}. Using Coulomb scattering state wave functions for the fully ionized plasma, we find a substantially enhanced neutron production rate. The scattering wave function should replace the bound state wave function for estimates of the enhanced neutron production rate on water plasma drenched cathodes of chemical cells.

A. Widom; J. Swain; Y. N. Srivastava

2013-05-19T23:59:59.000Z

13

Tsung-Dao Lee, Weak Interactions, and Nonconservation of Parity  

Office of Scientific and Technical Information (OSTI)

Tsung-Dao Lee, Weak Interactions, and Nonconservation of Parity Tsung-Dao Lee, Weak Interactions, and Nonconservation of Parity Resources with Additional Information Tsung-Dao Lee Courtesy of Brookhaven National Laboratory T. D. Lee "has devoted his long career to the study of the theoretical aspects of particle and nuclear physics. In 1957, Lee and Chen Ning Yang won the Nobel Prize in physics for disproving a tenet of physics known as the conservation of parity. Their finding was based on research carried out at Brookhaven's particle accelerator, the Cosmotron, while they were visiting scientists at the Laboratory in 1956. In 1997, forty years after receiving the Nobel Prize, Lee returned to Brookhaven Lab as Director of the RIKEN BNL Research Center. Japan's Institute of Physical and Chemical Research (RIKEN) and Brookhaven formed the collaboration to work on basic questions in physics. In addition to developing physics theory, the collaboration studies data produced by Brookhaven's newest accelerator, the Relativistic Heavy Ion Collider, to understand the properties of quark-gluon plasma, a state of matter that scientists theorize existed near the beginning of the Universe.

14

BE condensates of weakly interacting bosons in gravity fields  

E-Print Network (OSTI)

The Bose-Einstein (BE) condensates of weakly interacting bosons in a strong gravity field, such as AGN (Active Galactic Nuclei), BHs (black holes) and neutron stars, are discussed. Being bound systems in gravity fields, these are stable reservoirs for the Higgs bosons, and vector bosons of Z and W as well as supersymmetric bosons. Upon gravitational disturbances, such as a gravitational collapse, these objects are relieved from the BE condensate bound states and decay or interact with each other freely. Using the repulsive nature of gravity at short distances which was obtained by the present author as quantum corrections to gravity, the particles produced by the decays or interactions of the bosons liberated from BE condensates can be emitted outside the horizon for our observation. It is suggested that the recently observed gamma ray peak at 129.8 +- 2.4 GeV from FERMI Large Area Telescope may be evidence for the existence of the Higgs boson condensates. The BE condensates of supersymmetric bosons are the most likely sources for the gamma rays from DMP (dark matter particle) and anti-DMP collisions. It is shown that the said process from DMPs spread in the galaxy is too small for the incident DMP with the intensity of the cosmic ray energy spectrum.

Yukio Tomozawa

2012-11-21T23:59:59.000Z

15

Weak Gravity Conjecture and Holographic Dark Energy Model with Interaction and Spatial Curvature  

E-Print Network (OSTI)

In the paper, we apply the weak gravity conjecture to the holographic quintessence model of dark energy. Three different holographic dark energy models are considered: without the interaction in the non-flat universe; with interaction in the flat universe; with interaction in the non-flat universe. We find that only in the models with the spatial curvature and interaction term proportional to the energy density of matter, it is possible for the weak gravity conjecture to be satisfied.

Cheng-Yi Sun

2010-07-09T23:59:59.000Z

16

Inspecting the Higgs for New Weakly Interacting Particles  

E-Print Network (OSTI)

We explore new physics scenarios which are optimally probed through precision Higgs measurements rather than direct collider searches. Such theories consist of additional electroweak charged or singlet states which couple directly to or mix with the Higgs boson; particles of this kind may be weakly constrained by direct limits due to their meager production rates and soft decay products. We present a simplified framework which characterizes the effects of these states on Higgs physics by way of tree level mixing (with neutral scalars) and loop level modifications (from electrically charged states), all expressed in terms of three mixing angles and three loop parameters, respectively. The theory parameters are constrained and in some cases even fixed by ratios of Higgs production and decay rates. Our setup is simpler than a general effective operator analysis, in that we discard parameters irrelevant to Higgs observables while retaining complex correlations among measurements that arise due to the underlying m...

Cheung, Clifford; Zurek, Kathryn M

2013-01-01T23:59:59.000Z

17

Constraining the interacting dark energy models from weak gravity conjecture and recent observations  

E-Print Network (OSTI)

We examine the effectiveness of the weak gravity conjecture in constraining the dark energy by comparing with observations. For general dark energy models with plausible phenomenological interactions between dark sectors, we find that although the weak gravity conjecture can constrain the dark energy, the constraint is looser than that from the observations.

Chen, Ximing; Pan, Nana; Gong, Yungui

2010-01-01T23:59:59.000Z

18

Inspecting the Higgs for New Weakly Interacting Particles  

E-Print Network (OSTI)

We explore new physics scenarios which are optimally probed through precision Higgs measurements rather than direct collider searches. Such theories consist of additional electroweak charged or singlet states which couple directly to or mix with the Higgs boson; particles of this kind may be weakly constrained by direct limits due to their meager production rates and soft decay products. We present a simplified framework which characterizes the effects of these states on Higgs physics by way of tree level mixing (with neutral scalars) and loop level modifications (from electrically charged states), all expressed in terms of three mixing angles and three loop parameters, respectively. The theory parameters are constrained and in some cases even fixed by ratios of Higgs production and decay rates. Our setup is simpler than a general effective operator analysis, in that we discard parameters irrelevant to Higgs observables while retaining complex correlations among measurements that arise due to the underlying mixing and radiative effects. We show that certain correlated observations are forbidden, e.g. a depleted ratio of Higgs production from gluon fusion versus vector boson fusion together with a depleted ratio of Higgs decays to bb versus WW. Moreover, we study the strong correlation between the Higgs decay rate to gamma gamma and WW and how it can be violated in the presence of additional electrically charged particles. Our formalism maps straightforwardly onto a variety of new physics models, such as the NMSSM. We show, for example, that with a Higgsino of mass > 100 GeV and a singlet-Higgs coupling of lambda=0.7, the photon signal strength can deviate from the vector signal strength by up to ~ 40-60% while depleting the vector signal strength by only 5-15% relative to the Standard Model.

Clifford Cheung; Samuel D. McDermott; Kathryn M. Zurek

2013-02-01T23:59:59.000Z

19

Detecting Weak Interactions between Au- and Gas Molecules: A Photoelectron Spectroscopic and Ab Initio Study  

DOE Green Energy (OSTI)

In this communication, we report a joint experimental and theoretical study of the interactions between gold anion, Au-, and an NG atom (NG ) Ne, Ar, Kr, Xe) or a molecule of O2, CH4, or H2O. Except for the Au- · · ·H2O interaction, which is comparable to strong hydrogen bonding, all of these are weak charge-induced intermolecular interactions. The observation of a weakly bound Au(O2)- complex shows the inertness of Au- toward O2, in line with the previous observation of the odd-even effect in the reactions of Aun - clusters and O2. By comparing with results of high-level ab initio calculations, we demonstrate that anion PES is a good technique for probing weak charge-induced intermolecular interactions.

Gao, Yi; Huang, Wei; Woodford, Jeffrey; Wang, Lai S.; Zeng, Xiao Cheng

2009-06-19T23:59:59.000Z

20

Weak interaction rates for Kr and Sr waiting-point nuclei under rp-process conditions  

E-Print Network (OSTI)

Weak interaction rates are studied in neutron deficient Kr and Sr waiting-point isotopes in ranges of densities and temperatures relevant for the rp-process. The nuclear structure is described within a microscopic model (deformed QRPA) that reproduces not only the half-lives but also the Gamow-Teller strength distributions recently measured. The various sensitivities of the decay rates to both density and temperature are discussed. Continuum electron capture is shown to contribute significantly to the weak rates at rp-process conditions.

P. Sarriguren

2009-10-06T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Liquid-gas Phase Transition in Strange Hadronic Matter with Weak Y-Y Interaction  

E-Print Network (OSTI)

The liquid-gas phase transition in strange hadronic matter is reexamined by using the new parameters about the $\\Lambda - \\Lambda$ interaction deduced from recent observation of $^{6}_{\\Lambda\\Lambda}He$ double hypernucleus. The extended Furnstahl-Serot-Tang model with nucleons and hyperons is utilized. The binodal surface, the limit pressure, the entropy, the specific heat capacity and the Caloric curves are addressed. We find that the liquid-gas phase transition can occur more easily in strange hadronic matter with weak Y-Y interaction than that of the strong Y-Y interaction.

Li Yang; Shao Yu Yin; Wei Liang Qian; Ru-keng Su

2005-06-19T23:59:59.000Z

22

Interaction of impurity ions with a weakly non-Maxwellian simple hydrogenic plasma  

DOE Green Energy (OSTI)

The average acceleration of an ensemble of ''test particles'' in a plasma is called the ''dynamical friction''; the average rate at which their velocity vectors spread out in velocity space is expressed in a velocity-space diffusion-rate tensor. These quantities are derived for impurity ions interacting with a weakly non-Maxwellian simple hydrogenic plasma. The distribution functions for the plasma ions and electrons are written explicitly. 5 refs., 3 figs.

Terry, W.K.

1988-08-01T23:59:59.000Z

23

Weak Interaction Models with New Quarks and Right-handed Currents  

DOE R&D Accomplishments (OSTI)

We discuss various weak interaction issues for a general class of models within the SU(2) x U(1) gauge theory framework, with special emphasis on the effects of right-handed, charged currents and of quarks bearing new quantum numbers. In particular we consider the restrictions on model building which are imposed by the small KL - KS mass difference and by the .I = = rule; and we classify various possibilities for neutral current interactions and, in the case of heavy mesons with new quantum numbers, various possibilities for mixing effects analogous to KL - KS mixing.

Wilczek, F. A.; Zee, A.; Kingsley, R. L.; Treiman, S. B.

1975-06-00T23:59:59.000Z

24

Space Inversion of Spinors Revisited: A Possible Explanation of Chiral Behavior in Weak Interactions  

E-Print Network (OSTI)

We investigate a model in which spinors are considered as being embedded within the Clifford algebra that operates on them. In Minkowski space $M_{1,3}$, we have four independent 4-component spinors, each living in a different minimal left ideal of $Cl(1,3)$. We show that under space inversion, a spinor of one left ideal transforms into a spinor of another left ideal. This brings novel insight to the role of chirality in weak interactions. We demonstrate the latter role by considering an action for a generalized spinor field $\\psi^{\\alpha i}$ that has not only a spinor index $\\alpha$ but also an extra index $i$ running over four ideals. The covariant derivative of $\\psi^{\\alpha i}$ contains the generalized spin connection, the extra components of which are interpreted as the SU(2) gauge fields of weak interactions and their generalization. We thus arrive at a system that is left-right symmetric due to the presence of a "parallel sector", postulated a long time ago, that contains mirror particles coupled to mirror SU(2) gauge fields.

Matej Pavsic

2010-05-10T23:59:59.000Z

25

Measurement of the parity nonconserving neutral weak interaction in atomic thallium  

Science Conference Proceedings (OSTI)

This thesis describes an experiment to measure parity nonconservation in atomic thallium. A frequency doubled, flashlamp pumped tunable dye laser is used to excite the 6P/sub 1/2/(F = 0) ..-->.. 7P/sub 1/2/(F = 1) transition at 292.7 nm, with circularly polarized light. An electrostatic field E of 100 to 300 V/cm causes this transition to occur via Stark induced electric dipole. Two field free transitions may also occur: a highly forbidden magnetic dipole M, and a parity nonconserving electric dipole epsilon/sub P/. The latter is presumed to be due to the presence of a weak neutral current interaction between the 6p valence electron and the nucleus, as predicted by gauge theories which unite the electromagnetic and weak interactions. Both M and epsilon/sub P/ interfere with the Stark amplitude ..beta..E to produce a polarization of the 7P/sub 1/2/ state. This is measured with a circularly polarized infrared laser beam probe, tuned to the 7P/sub 1/2/ ..-->.. 8S/sub 1/2/ transition. This selectively excites m/sub F/ = +1 or -1 components of the 7P/sub 1/2/ state, and the polarization is seen as an asymmetry in 8S ..-->.. 6P/sub 3/2/ fluorescence when the probe helicity is reversed. The polarization due to M is ..delta../sub M/ = -2M/(BETAE). It is used to calibrate the analyzing efficiency. The polarization due to epsilon/sub P/ is ..delta../sub P/ = 2i epsilon/sub P//(..beta..E), and can be distinguished from ..delta../sub M/ by its properties under reversal of the 292.7 nm photon helicity and reversal of the laser direction. A preliminary measurement yielded a parity violation in agreement with the gauge theory of Weinberg and Salam.

Bucksbaum, P.H.

1980-11-01T23:59:59.000Z

26

More about the hypothesis of a new weak interaction of electromagnetic field in the hidden sector  

E-Print Network (OSTI)

New hypothetical field equations (Eqs. (1) and (2)) are further discussed, unifying Maxwell's equations of the Standard Model (after the electroweak symmetry is spontaneously broken) with the dynamics of hidden sector (expected to be responsible for the cold dark matter). The hidden sector is represented by sterile spin-1/2 Dirac fermions ("sterinos") and sterile spin-0 bosons ("sterons") whose masses are spontaneously generated by a nonzero vacuum expectation value of the steron field, while sterino and steron interactions are mediated by sterile spin-1 quanta of an antisymmetric-tensor field with a large mass scale ("A bosons"). These interactions are presumed to be weak, but stronger than the universal gravity. Beside sterinos and sterons, the Standard-Model photons are included into the source of sterile A bosons and so, they become a link between the hidden and Standard-Model sectors ("photonic portal" to the hidden sector). The relativistic structure of antisymmetric-tensor field of sterile A bosons can be split into a vector and an axial three-dimensional fields (of spin 1 and parities - and +) in such a way that the Standard-Model electric and magnetic fields become involved separately in the sources of these two kinds of sterile A-boson radiation, respectively.

Wojciech Krolikowski

2009-03-30T23:59:59.000Z

27

EXISTENCE OF WEAK SOLUTIONS TO A CLASS OF NONSTRICTLY HYPERBOLIC CONSERVATION LAWS WITH NON-INTERACTING WAVES  

E-Print Network (OSTI)

Many applied problems resulting in hyperbolic conservation laws are nonstrictly hyperbolic. As of yet, there is no comprehensive theory to describe the solutions of these systems. In this paper, a proof of existence is given for a class of nonstrictly hyperbolic conservation laws using a proof technique first applied by Glimm to systems of strictly hyperbolic conservation laws. We show that Glimm’s scheme can be used to construct a subsequence converging to a weak solution. This paper necessarily departs from previous work in showing the existence of a convergent subsequence. A novel functional, shown to be equivalent to the total variation norm, is defined according to wave interactions. These interactions can be bounded without any assumptions of strict hyperbolicity. 1. Introduction. A conservation law is called nonstrictly hyperbolic if the eigenvalues of the

Anthony J. Kearsley; Andrea M. Reiff

2002-01-01T23:59:59.000Z

28

NN Weak Interaction Experiments  

Science Conference Proceedings (OSTI)

... The Spallation Neutron Source at ORNL ? $1.4B--1GeV protons at 2MW, ready now. ? Short (~1 usec) proton pulse– mainly for high TOF resolution ...

2009-07-13T23:59:59.000Z

29

Summary of working group g: beam material interaction  

E-Print Network (OSTI)

For the first time, the workshop on High-Intensity and High-Brightness Hadron Beams (HB2010), held at Morschach, Switzerland and organized by the Paul Scherrer Institute, included a Working group dealing with the interaction between beam and material. Due to the high power beams of existing and future facilities, this topic is already of great relevance for such machines and is expected to become even more important in the future. While more specialized workshops related to topics of radiation damage, activation or thermo - mechanical calculations, already exist, HB2010 provided the occasion to discuss the interplay of these topics, focusing on components like targets, beam dumps and collimators, whose reliability are crucial for a user facility. In addition, a broader community of people working on a variety of issues related to the operation of accelerators could be informed and their interest sparked.

Kiselev, D; Schmidt, R

2011-01-01T23:59:59.000Z

30

Phenomenology of the neutral Higgs-boson in the Weinberg-Salam theory of the weak interactions  

SciTech Connect

The thesis discusses the phenomenological aspects of the Higgs-boson H in the Glashow-Weinberg-Salam SU(2) circle X U(1) Standard Model of the weak interactions. The structures of familiar nonabelian gauge theories and the fermion mass matrix, including some of the latest analyses of the Kobayashi-Maskawa (K.M.) generalization of the Cabbibo and Glashow-IIiopoulons-Maiani (GIM) formulations of universal are reviewed. Some of the properties (coupling, mass, etc.) of the Higgs-boson including comments on some previous suggested reactions and decay modes for the Higgs-boson production in the Standard Model are presented. After the background is reviewed, there is discussion of the research done in the University of Pittsburgh, which includes: a new possible production mechanism for the neutral Higgs-boson in the Standard Model; an empirical lower bound for the mass of the Higgs boson by examining the K/sup +/-/..--> pi../sup +/-///sup +///sup -/ decays; and an investigation of the strong radiative correction to the Q..-->..qH vertex which is just a Sudakov form factor.

Yu, H.L.

1982-01-01T23:59:59.000Z

31

Group tele-immersion:enabling natural interactions between groups at distant sites.  

SciTech Connect

We present techniques and a system for synthesizing views for video teleconferencing between small groups. In place of replicating one-to-one systems for each pair of users, we create a single unified display of the remote group. Instead of performing dense 3D scene computation, we use more cameras and trade-off storage and hardware for computation. While it is expensive to directly capture a scene from all possible viewpoints, we have observed that the participants viewpoints usually remain at a constant height (eye level) during video teleconferencing. Therefore, we can restrict the possible viewpoint to be within a virtual plane without sacrificing much of the realism, and in cloning so we significantly reduce the number of required cameras. Based on this observation, we have developed a technique that uses light-field style rendering to guarantee the quality of the synthesized views, using a linear array of cameras with a life-sized, projected display. Our full-duplex prototype system between Sandia National Laboratories, California and the University of North Carolina at Chapel Hill has been able to synthesize photo-realistic views at interactive rates, and has been used to video conference during regular meetings between the sites.

Yang, Christine L. (Sandia National Laboratories, Livermore, CA); Stewart, Corbin (Sandia National Laboratories, Livermore, CA); Nashel, Andrew (University of North Carolina at Chapel Hill, Chapel Hill, NC)

2005-08-01T23:59:59.000Z

32

Low energy weak interactions and decays. [Partial summary of presentations at XXth International Conf. on High Energy Physics, Madison, Wisc. , July 17-23, 1980  

SciTech Connect

Results presented during sessions B5 to 7 at the XXth International Conference on High Energy Physics (University of Wisconsin, Madison, July 17 to 23, 1980) are discussed. Essentially all the material presented is summarized. The sessions covered various aspects of low-energy weak interactions. The following topics are addressed: CP-invariance violation, high-statistics study of ..lambda.. beta decay, parity violation in proton-nucleus scattering at 6 GeV/c, new results on the tau, charm particle decays (direct lifetime determinations, semileptonic branching ratios, comparison of semileptonic rate with theoretical expectations, further study of charm meson decays, F decays), and neutrino oscillations. 6 figures, 9 tables. (RWR)

Trilling, G.H.

1980-09-01T23:59:59.000Z

33

Two-dimensional nonlinear finite element analysis of well damage due to reservoir compaction, well-to-well interactions, and localization on weak layers  

Science Conference Proceedings (OSTI)

In this paper the authors present the results of a coupled nonlinear finite element geomechanics model for reservoir compaction and well-to-well interactions for the high-porosity, low strength diatomite reservoirs of the Belridge field near Bakersfield, California. They show that well damage and failures can occur under the action of two distinct mechanisms: shear deformations induced by pore compaction, and subsidence, and shear deformations due to well-to-well interactions during production or water injection. They show such casting damage or failure can be localized to weak layers that slide or slip under shear due to subsidence. The magnitude of shear displacements and surface subsidence agree with field observations.

Hilbert, L.B. Jr. [Univ. of California, Berkeley, CA (United States); Fredrich, J.T. [Sandia National Labs., Albuquerque, NM (United States); Bruno, M.S. [Terralog Technologies USA, Inc., Arcadia, CA (United States); Deitrick, G.L.; Rouffignac, E.P. de [Shell Exploration and Production Co., Houston, TX (United States)

1996-05-01T23:59:59.000Z

34

Texas Tech University Knowledge Representation Group Issues in Reasoning about Interaction Networks in Cells  

E-Print Network (OSTI)

1 Texas Tech University Knowledge Representation Group Issues in Reasoning about Interaction Proceedings of AAAI'05 November 3, 2010 #12;2 Texas Tech University Knowledge Representation Group;3 Texas Tech University Knowledge Representation Group Previous Paper · They used an action language

Zhang, Yuanlin

35

The SmartPhone: Interactive Group Audio with Complementary Symbolic Control  

Science Conference Proceedings (OSTI)

The SmartPhone provides a medium for distributed interactive group dialog by complementing an audio channel with a symbolic control channel. The control channel conveys information used for speaker identification, feedback, and turn taking. While these ...

Tim Moors

2002-04-01T23:59:59.000Z

36

Energy efficiency advocacy groups: A study of selected interactive efforts and independent initiatives  

Science Conference Proceedings (OSTI)

Non-utility groups participate in a myriad of activities--initiated by themselves and others--aimed at influencing the policies and actions of utilities and their regulators related to Integrated Resource Planning (IRP) and Demand-Side Management (DSM). Some of these activities are not directed toward a particular regulatory body or utility but are designed to influence public knowledge and acceptance of IRP and DSM. Other activities involve interaction with a particular utility or regulatory body. The traditional forum for this interaction is an adversarial debate (i.e., litigation or regulatory intervention) over the merits of a utility`s plan or proposed action. However, an increasingly common forum is one in which non-utility groups and utilities cooperatively develop plans, policies, and/or programs. Arrangements of this type are referred to in this report as ``interactive efforts``. This report presents the findings derived from ten case studies of energy efficiency advocacy groups (EEAG) activities to influence the use of cost-effective DSM and to promote IRP; nine of these ten cases involve some form of interactive effort and all of them also include other EEAG activities. The goal of this research is not to measure the success of individual activities of the various groups, but to glean from a collective examination of their activities an understanding of the efficacy of various types of interactive efforts and other EEAG activities and of the contextual and procedural factors that influence their outcomes.

Schweitzer, M. [Oak Ridge National Lab., TN (United States); English, M.; Schexnayder, S.; Altman, J. [Univ. of Tennessee, Knoxville, TN (United States). Energy, Environment, and Resources Center

1994-03-01T23:59:59.000Z

37

Oceanic Internal Waves Are Not Weak Waves  

Science Conference Proceedings (OSTI)

It is shown that the oceanic internal wave field is too energetic by roughly two orders of magnitude to be treated theoretically as an assemblage of weakly interacting waves. This may be seen both from recent weak wave theoretical calculations ...

Greg Holloway

1980-06-01T23:59:59.000Z

38

Seating Arrangement, Group Composition and Competition-driven Interaction: Effects on Students' Performance in Physics  

Science Conference Proceedings (OSTI)

We probe the effect of seating arrangement, group composition and group-based competition on students' performance in Physics using a teaching technique adopted from Mazur's peer instruction method. Ninety eight lectures, involving 2339 students, were conducted across nine learning institutions from February 2006 to June 2009. All the lectures were interspersed with student interaction opportunities (SIO), in which students work in groups to discuss and answer concept tests. Two individual assessments were administered before and after the SIO. The ratio of the post-assessment score to the pre-assessment score and the Hake factor were calculated to establish the improvement in student performance. Using actual assessment results and neural network (NN) modeling, an optimal seating arrangement for a class was determined based on student seating location. The NN model also provided a quantifiable method for sectioning students. Lastly, the study revealed that competition-driven interactions increase within-group cooperation and lead to higher improvement on the students' performance.

Roxas, R. M.; Monterola, C. [National Institute of Physics, University of the Philippines, Diliman, Quezon City 1101 (Philippines); Carreon-Monterola, S. L. [College of Education, University of the Philippines, Diliman, Quezon City 1101 (Philippines)

2010-07-28T23:59:59.000Z

39

Conservation Laws in Weak Interactions  

DOE R&D Accomplishments (OSTI)

Notes are presented on four lectures given at Harvard University in March 1957 on elementary particle physics, the theta-tau problem, validity of parity conservation, tests for invariance under P, C, and T, and the two-component theory of the neutrino. (W.D.M.)

Lee, T. D.

1957-03-00T23:59:59.000Z

40

Search for a Light Higgs Boson Decaying to Long-Lived Weakly Interacting Particles in Proton-Proton Collisions at root s=7 TeV with the ATLAS Detector  

Science Conference Proceedings (OSTI)

A search for the decay of a light Higgs boson (120-140 GeV) to a pair of weakly interacting, long-lived particles in 1.94 fb{sup -1} of proton-proton collisions at {radical}s = 7 TeV recorded in 2011 by the ATLAS detector is presented. The search strategy requires that both long-lived particles decay inside the muon spectrometer. No excess of events is observed above the expected background and limits on the Higgs boson production times branching ratio to weakly interacting, long-lived particles are derived as a function of the particle proper decay length.

Aad G.; Abbott, B.; Abdallah, J.; Abdelalim, A. A.; Abdesselam, A.; Abdinov, O.; Abi, B.; Abolins, M.; AbouZeid, O. S.; Abramowicz, H.; Abreu, H.; Acerbi, E.; Acharya, B. S.; Adamczyk, L.; Adams, D. L.; Addy, T. N.; Adelman, J.; Aderholz, M.; Adomeit, S.; et al.

2012-06-19T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Groups  

Open Energy Info (EERE)

groups/all/feed en Buildings groups/all/feed en Buildings http://en.openei.org/community/group/buildings Description: This group is dedicated to discussions about green buildings, energy use in buildings, occupant comfort in buildings, and building technologies. The OpenEI Buildings Community Group will be dedicated to discussions, blogs, and postings about new building technologies, green buildings, energy use in buildings, and occupant experience (comfort levels) in green buildings.group/buildings" target="_blank">read more architecture building reviews buildings technology comfort energy use facilities management green building LEED technologies usgbc

42

Search for a Light Higgs Boson Decaying to Long-Lived Weakly Interacting Particles in Proton-Proton Collisions at ?s=7??TeV with the ATLAS Detector  

E-Print Network (OSTI)

A search for the decay of a light Higgs boson (120–140 GeV) to a pair of weakly interacting, long-lived particles in 1.94??fb-1 of proton-proton collisions at ?s=7??TeV recorded in 2011 by the ATLAS detector is presented. ...

Taylor, Frank E.

43

The Relative Effectiveness of Positive Interdependence and Group Processing on Student Achievement, Interaction, and Attitude in Online Cooperative Learning  

E-Print Network (OSTI)

The purpose of this study was to investigate the relative effectiveness of positive interdependence and group processing on student achievement, interaction, and attitude in online cooperative learning. All of the participants, 144 college students enrolled in one of three different courses, received initial general instruction about teamwork skills and cooperative learning at the start of the study. Participants were then randomly assigned to one of three treatment groups: positive interdependence, group processing, and no structure. The ?positive interdependence? groups received subsequent positive interdependence skills training which were then utilized in their instructional activities. The ?group processing? groups received subsequent group processing skills training for use in their instructional activities. The ?no structure? groups received no additional instructional treatment beyond the initial basic teamwork and cooperative learning training. Results indicated that there were significant differences among students in the ?positive interdependence,? ?group processing,? and ?no structure? groups with respect to their achievement scores and interactions. Participants in the ?positive interdependence? groups had significantly higher achievement than participants in either the ?group processing? groups or the ?no structure? groups. In addition, participants in the ?positive interdependence? groups and the ?group processing? groups interacted with each other to a greater extent than those in the ?no structure? groups. This study also examined the relative effectiveness of positive interdependence and group processing on types of student interaction. The results indicated that ?positive interdependence? strategies were relatively more effective than ?group processing? strategies on ?sharing and comparing of information? interactions, whereas ?group processing? strategies were relatively more effective than ?positive interdependence? strategies on ?negotiation of meaning and co-construction of knowledge? interactions. Regarding student attitude towards the experiences of cooperative learning: participation, communication resources, and online activities, there was no significant difference among any of the three groups. The overall results of this study suggest that instructors would be advised to incorporate positive interdependence strategies in their online courses to help students perceive that they should actively contribute to their online group activities. In addition, instructors are recommended to inform groups of the individual progress of each member?s activities periodically by employing group processing strategies.

Nam, Chang Woo

2008-12-01T23:59:59.000Z

44

Quenching of internal rotations versus collisional cooling at ultralow energies for weakly interacting partners: Cs{sub 2}({sup 3{Sigma}}{sub u}{sup +}) with {sup 3,4}He  

SciTech Connect

Quantum-scattering calculations at ultralow (close to 10{sup -6} cm{sup -1}) collision energies are carried out for the Cs dimer in its spin-stretched triplet state, interacting with helium. An ab initio potential energy surface is computed and employed, while the target molecule is kept in its ground vibrational state and several excitated initial rotational states are considered in the quantum dynamics. The highly anisotropic interaction is seen to cause, in spite of its weakness, internal energy quenching rates comparable with the efficiency of the collisional cooling of relative kinetic energies. The rates of spin-flip processes are also analyzed and compared with pure rotational quenching events.

Caruso, D.; Tacconi, M.; Gianturco, F. A. [Department of Chemistry and CNISM, University of Rome La Sapienza, Piazzale A. Moro 5, I-00185 Rome (Italy); Yurtsever, E. [Department of Chemistry, Koc University, Rumelifeneriyolu, TR-34450 Sariyer, Istanbul (Turkey)

2010-04-15T23:59:59.000Z

45

CP Violation, Neutral Currents, and Weak Equivalence  

DOE R&D Accomplishments (OSTI)

Within the past few months two excellent summaries of the state of our knowledge of the weak interactions have been presented. Correspondingly, we will not attempt a comprehensive review but instead concentrate this discussion on the status of CP violation, the question of the neutral currents, and the weak equivalence principle.

Fitch, V. L.

1972-03-23T23:59:59.000Z

46

Structure of Low-Energy Collective $0^{-}$-States in Doubly Magic Nuclei and Matrix Elements of the P-odd and P- and T-odd Weak Interaction  

E-Print Network (OSTI)

The structure of the collective low-energy $J^{\\pi}=0^{-}$ (T=0 and T=1) modes is studied for a doubly magic nucleus in a schematic analytic model of RPA. The $0^{-}$ phonon states ($T= 0,1$) lie at energies $E_{T=0}(0^{-}) \\alt \\omega$ and $E_{T=1}(0^{-}) > \\omega$, where $\\omega$ is the oscillator frequency. The matrix elements of P-odd and P- and T-odd weak one-body potentials connecting the ground state to these $0^{-}$-states, $W_{coll}$, are enhanced by the factor $\\sim 2 (\\frac{\\omega}{E})^{1/2}A^{1/3} \\sim 10$ as compared to the single-particle value $w_{sp}$ what can result in values $|W_{coll}| \\sim 20-30 eV$ if standard values of DDH parameters are used for $w_{sp}$. Similar enhancement arises in the P- and T-odd case.

O. K. Vorov; N. Auerbach; V. V. Flambaum

1996-03-31T23:59:59.000Z

47

Renormalized weak plasma turbulence theory  

SciTech Connect

A renormalized Vlasov turbulence theory, derived by neglecting a mode coupling term in the Direct Interaction Approximation, is discussed. The theory reduces correctly to weak turbulence theory; it predicts both diffusion and polarization effects of the turbulent medium on test particles, as well as the inverse effects of the test particles on the medium. A heuristic, physical algorithm is presented for constructing the equations. The theory of the renormalized dielectric function is reviewed.

Krommes, J.A.; Kleva, R.G.

1979-02-01T23:59:59.000Z

48

Making a difference: Ten case studies of DSM/IRP interactive efforts and related advocacy group activities  

Science Conference Proceedings (OSTI)

This report discusses the activities of organizations that seek to promote integrated resource planning and aggressive, cost-effective demand-side management by utilities. The activities of such groups -- here called energy efficiency advocacy groups (EEAGs) -- are examined in ten detailed am studies. Nine of the cases involve some form of interactive effort between investor-owned electric utilities and non-utility to develop policies, plans, or programs cooperatively. Many but not all of the interactive efforts examined are formal collaboratives. In addition, all ten cases include discussion of other EEAG activities, such as coalition-building, research, participation in statewide energy planning, and intervention in regulatory proceedings.

English, M.; Schexnayder, S.; Altman, J. [Tennessee Univ., Knoxville, TN (United States). Energy, Environment and Resources Center; Schweitzer, M. [Oak Ridge National Lab., TN (United States)

1994-03-01T23:59:59.000Z

49

On the relationship between head pose, social attention and personality prediction for unstructured and dynamic group interactions  

Science Conference Proceedings (OSTI)

Correlates between social attention and personality traits have been widely acknowledged in social psychology studies. Head pose has commonly been employed as a proxy for determining the social attention direction in small ... Keywords: head pose, personality classification, social attention, unstructured and dynamic group interactions

Ramanathan Subramanian, Yan Yan, Jacopo Staiano, Oswald Lanz, Nicu Sebe

2013-12-01T23:59:59.000Z

50

Collider Detector at Fermilab (CDF): Data from the QCD Group's Research into Properties of the Strong Interaction  

DOE Data Explorer (OSTI)

The Collider Detector at Fermilab (CDF) is a Tevatron experiment at Fermilab. The Tevatron, a powerful particle accelerator, accelerates protons and antiprotons close to the speed of light, and then makes them collide head-on inside the CDF detector. The CDF detector is used to study the products of such collisions. The CDF Physics Group at Fermilab is organized into six working groups, each with a specific focus. The QCD group studies the properties of the strong interaction. Their public web page makes data and numerous figures available from both CDF Runs I and II.

,

51

ElectroWeak theory after the first LHC phase  

E-Print Network (OSTI)

I summarize the status of the ElectroWeak Interactions after the first phase of the Large Hadron Collider and I give an outlook on its possible developments.

Riccardo Barbieri

2013-09-13T23:59:59.000Z

52

ElectroWeak theory after the first LHC phase  

E-Print Network (OSTI)

I summarize the status of the ElectroWeak Interactions after the first phase of the Large Hadron Collider and I give an outlook on its possible developments.

Barbieri, Riccardo

2013-01-01T23:59:59.000Z

53

Electromagnetic weak turbulence theory revisited  

SciTech Connect

The statistical mechanical reformulation of weak turbulence theory for unmagnetized plasmas including fully electromagnetic effects was carried out by Yoon [Phys. Plasmas 13, 022302 (2006)]. However, the wave kinetic equation for the transverse wave ignores the nonlinear three-wave interaction that involves two transverse waves and a Langmuir wave, the incoherent analogue of the so-called Raman scattering process, which may account for the third and higher-harmonic plasma emissions. The present paper extends the previous formalism by including such a term.

Yoon, P. H. [IPST, University of Maryland, College Park, Maryland 20742 (United States); Ziebell, L. F. [Instituto de Fisica, UFRGS, Porto Alegre, RS (Brazil); Gaelzer, R.; Pavan, J. [Instituto de Fisica e Matematica, UFPel, Pelotas, RS (Brazil)

2012-10-15T23:59:59.000Z

54

Predicting Generalized Ecosystem Groups with the NCAR CCM: First Steps towards an Interactive Biosphere  

Science Conference Proceedings (OSTI)

Canopy-plus-soil “big-leaf” models of the land surface now exist and are being incorporated in global climate models. These big-leaf models could be the basis for the incorporation of an interactive land biosphere into global models. However, ...

A. Henderson-Sellers

1990-09-01T23:59:59.000Z

55

Age-adapted psychoacoustics: target group oriented sound schemes for the interaction with telemedical systems  

Science Conference Proceedings (OSTI)

For the interaction of elderly people with IT systems, an ergonomic and intuitive design as well as self-explanatory handling processes are particularly relevant. Herein adequate acoustic feedback, which accounts for the specific needs and experience ... Keywords: acoustic feedback, psychoacoustic, telemedicine

Alexander Mertens; Philipp Przybysz; Alexander Groß; David Koch-Koerfges; Claudia Nick; Martin Kaethner; Christopher M. Schlick

2011-07-01T23:59:59.000Z

56

Prospects for Multiple Weak Gauge Boson Production at Supercollider Energies  

E-Print Network (OSTI)

We discuss the prospects for observing multiple weak gauge boson production at the SSC and LHC. We summarize conventional perturbative cross sections for processes involving 1-6 final state weak gauge bosons and compare them with more speculative scenarios including 1) a toy model of a strongly interacting Higgs sector patterned after hadronic multipion production and 2) the nonperturbative production of O(30) weak gauge bosons in a weakly coupled gauge sector.

D. A. Morris

1993-08-24T23:59:59.000Z

57

Galaxy Interactions in Compact Groups I : The Galactic Winds of HCG16  

E-Print Network (OSTI)

Using the WiFeS integral field spectrograph, we have undertaken a series of observations of star-forming galaxies in Compact Groups. In this first paper dedicated to the project, we present the analysis of the spiral galaxy NGC838, a member of the Hickson Compact Group 16, and of its galactic wind. Our observations reveal that the wind forms an asymmetric, bipolar, rotating structure, powered by a nuclear starburst. Emission line ratio diagnostics indicate that photoionization is the dominant excitation mechanism at the base of the wind. Mixing from slow shocks (up to 20%) increases further out along the outflow axis. The asymmetry of the wind is most likely caused by one of the two lobes of the wind bubble bursting out of its HI envelope, as indicated by line ratios and radial velocity maps. The characteristics of this galactic wind suggest that it is caught early (a few Myr) in the wind evolution sequence. The wind is also quite different to the galactic wind in the partner galaxy NGC839 which contains a sy...

Vogt, Frédéric P A; Kewley, Lisa J

2013-01-01T23:59:59.000Z

58

Weak-link capacitor  

Science Conference Proceedings (OSTI)

A process for making a dielectric material where a precursor polymer selected from poly(phenylene vinylene) polyacetylene, poly(p-phenylene), poly(thienylene vinylene), poly(1,4-naphthylene vinylene), and poly(p-pyridine vinylene) is energized said by exposure by radiation or increase in temperature to a level sufficient to eliminate said leaving groups contained within the precursor polymer, thereby transforming the dielectric material into a conductive polymer. The leaving group in the precursor polymer can be a chloride, a bromide, an iodide, a fluoride, an ester, an xanthate, a nitrile, an amine, a nitro group, a carbonate, a dithiocarbamate, a sulfonium group, an oxonium group, an iodonium group, a pyridinium group, an ammonium group, a borate group, a borane group, a sulphinyl group, or a sulfonyl group.

Dirk, Shawn M. (Albuquerque, NM); Johnson, Ross S. (Albuquerque, NM); Wheeler, David R. (Albuquerque, NM); Bogart, Gregory R. (Corrales, NM)

2011-06-07T23:59:59.000Z

59

Weak-link capacitor  

DOE Patents (OSTI)

A process for making a dielectric material where a precursor polymer selected from poly(phenylene vinylene)polyacetylene, poly(p-phenylene), poly(thienylene vinylene), poly(1,4-naphthylene vinylene), and poly(p-pyridine vinylene) is energized said by exposure by radiation or increase in temperature to a level sufficient to eliminate said leaving groups contained within the precursor polymer, thereby transforming the dielectric material into a conductive polymer. The leaving group in the precursor polymer can be a chloride, a bromide, an iodide, a fluoride, an ester, an xanthate, a nitrile, an amine, a nitro group, a carbonate, a dithiocarbamate, a sulfonium group, an oxonium group, an iodonium group, a pyridinium group, an ammonium group, a borate group, a borane group, a sulphinyl group, or a sulfonyl group.

Dirk, Shawn M.; Johnson, Ross S.; Wheeler, David R.; Bogart, Gregory R.

2013-04-23T23:59:59.000Z

60

Phase estimation with weak measurement using a white light source  

E-Print Network (OSTI)

We report results of a high precision phase estimation based on a weak measurements scheme using commercial light-emitting diode. The method is based on a measurement of the imaginary part of the weak value of a polarization operator. The imaginary part of the weak value appeared due to the measurement interaction itself. The sensitivity of our method is equivalent to resolving light pulses of order of attosecond and it is robust against chromatic dispersion.

Xiao-Ye Xu; Yaron Kedem; Kai Sun; Lev Vaidman; Chuan-Feng Li; Guang-Can Guo

2013-06-20T23:59:59.000Z

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


61

Stopping power of weakly unstable plasmas  

SciTech Connect

An expression for the additional contribution to the stopping power of a weakly unstable plasma due to the modification of the beam--plasma collision operator by the presence of the unstable modes is derived and evaluated for a plasma with a flowing hot-electron tail, i.e., a bump-on-tail instability. It is found that the unstable plasma oscillations do not substantially alter the screening of the beam--plasma interaction.

Perez, J.D.; Payne, G.L.

1984-02-01T23:59:59.000Z

62

Higgs Quantum Numbers in Weak Boson Fusion  

E-Print Network (OSTI)

Recently, the ATLAS and CMS experiments have reported the discovery of a Higgs like resonance at the LHC. The next analysis step will include the determination of its spin and CP quantum numbers or the form of its interaction Lagrangian channel-by-channel. We show how weak-boson-fusion Higgs production and associated ZH production can be used to separate different spin and CP states.

C. Englert; D. Goncalves-Netto; K. Mawatari; T. Plehn

2012-12-04T23:59:59.000Z

63

Weak Energy: Form and Function  

E-Print Network (OSTI)

The equation of motion for a time-independent weak value of a quantum mechanical observable contains a complex valued energy factor - the weak energy of evolution. This quantity is defined by the dynamics of the pre-selected and post-selected states which specify the observable's weak value. It is shown that this energy: (i) is manifested as dynamical and geometric phases that govern the evolution of the weak value during the measurement process; (ii) satisfies the Euler-Lagrange equations when expressed in terms of Pancharatnam (P) phase and Fubini-Study (FS) metric distance; (iii) provides for a PFS stationary action principle for quantum state evolution; (iv) time translates correlation amplitudes; (v) generalizes the temporal persistence of state normalization; and (vi) obeys a time-energy uncertainty relation. A similar complex valued quantity - the pointed weak energy of an evolving state - is also defined and several of its properties in PFS-coordinates are discussed. It is shown that the imaginary part of the pointed weak energy governs the state's survival probability and its real part is - to within a sign - the Mukunda-Simon geometric phase for arbitrary evolutions or the Aharonov-Anandan (AA) phase for cyclic evolutions. Pointed weak energy gauge transformations and the PFS 1-form are discussed and the relationship between the PFS 1-form and the AA connection 1-form is established.

Allen D. Parks

2013-04-09T23:59:59.000Z

64

Weak Viscoelastic Nematodynamics of Maxwell Type  

E-Print Network (OSTI)

A constitutive theory for weak viscoelastic nematodynamics of Maxwell type is developed using the standard local approach of non-equilibrium thermodynamics. Along with particular viscoelastic and nematic kinematics, the theory uses the weakly elastic potential proposed by de Gennes for nematic solids and the LEP constitutive equations for viscous nematic liquids, while ignoring the Frank (orientation) elasticity and inertia effects. In spite of many basic parameters, algebraic properties of nematic operations investigated in Appendix, allowed us to reveal a general group structure of the theory and present it in a simple form. It is shown that the evolution equation for director is also viscoelastic. An example of magnetization clarifies the situation with non-symmetric stresses. When the sources of stress asymmetry are absent, the theory is simplified and its relaxation properties are described by a symmetric subgroup of nematic algebraic operations. A purely linear constitutive behavior exemplifies the symmetric situation.

Arkady I. Leonov; Valery S. Volkov

2004-08-26T23:59:59.000Z

65

Cobordisms to weakly splittable links  

E-Print Network (OSTI)

We show that if a link L with non-zero Alexander polynomial admits a locally flat cobordism to a `weakly m-split link', then the cobordism must have genus at least (m-1)/2. This generalises a recent result of J. Pardon.

Friedl, Stefan

2011-01-01T23:59:59.000Z

66

On Amplification by Weak Measurement  

E-Print Network (OSTI)

We analyze the amplification by the Aharonov-Albert-Vaidman weak quantum measurement on a Sagnac interferometer [P. B. Dixon et al., Phys. Rev. Lett. 102, 173601 (2009)] up to all orders of the coupling strength between the measured system and the measuring device. The amplifier transforms a small tilt of a mirror into a large transverse displacement of the laser beam. The conventional analysis has shown that the measured value is proportional to the weak value, so that the amplification can be made arbitrarily large in the cost of decreasing output laser intensity. It is shown that the measured displacement and the amplification factor are in fact not proportional to the weak value and rather vanish in the limit of infinitesimal output intensity. We derive the optimal overlap of the pre- and post-selected states with which the amplification become maximum. We also show that the nonlinear effects begin to arise in the performed experiments so that any improvements in the experiment, typically with an amplification greater than 100, should require the nonlinear theory in translating the observed value to the original displacement.

Tatsuhiko Koike; Saki Tanaka

2011-08-09T23:59:59.000Z

67

Persistent Currents in the Heisenberg chain with a weak link  

E-Print Network (OSTI)

The Heisenberg chain with a weak link is studied, as a simple example of a quantum ring with a constriction or defect. The Heisenberg chain is equivalent to a spinless electron gas under a Jordan-Wigner transformation. Using density matrix renormalization group and quantum Monte Carlo methods we calculate the spin/charge stiffness of the model, which determines the strength of the ‘persistent currents’. The stiffness is found to scale to zero in the weak link case, in agreement with renormalization group arguments of Eggert and Affleck, and Kane and Fisher.

T. M. R. Byrnes; R. J. Bursill; H. -p. Eckle; C. J. Hamer; A. W. Sandvik

2002-01-01T23:59:59.000Z

68

Biased Weak Polyform Achievement Games  

E-Print Network (OSTI)

In a biased weak $(a,b)$ polyform achievement game, the maker and the breaker alternately mark $a,b$ previously unmarked cells on an infinite board, respectively. The maker's goal is to mark a set of cells congruent to a polyform. The breaker tries to prevent the maker from achieving this goal. A winning maker strategy for the $(a,b)$ game can be built from winning strategies for games involving fewer marks for the maker and the breaker. A new type of breaker strategy called the priority strategy is introduced. The winners are determined for all $(a,b)$ pairs for polyiamonds and polyominoes up to size four.

Norris, Ian

2011-01-01T23:59:59.000Z

69

Quantum Weak Measurements and Cosmology  

E-Print Network (OSTI)

The indeterminism of quantum mechanics generally permits the independent specification of both an initial and a final condition on the state. Quantum pre-and-post-selection of states opens up a new, experimentally testable, sector of quantum mechanics, when combined with statistical averages of identical weak measurements. In this paper I apply the theory of weak quantum measurements combined with pre-and-post-selection to cosmology. Here, pre-selection means specifying the wave function of the universe or, in a popular semi-classical approximation, the initial quantum state of a subset of quantum fields propagating in a classical back-ground spacetime. The novel feature is post-selection: the additional specification of a condition on the quantum state in the far future. I discuss "natural" final conditions, and show how they may lead to potentially large and observable effects at the present cosmological epoch. I also discuss how pre-and-post-selected quantum contrast to the expectation value of the stress-energy-momentum tensor, resolving a vigorous debate from the 1970's. The paper thus provides a framework for computing large-scale cosmological effects arising from this new sector of quantum mechanics. A simple experimental test is proposed.

Paul Davies

2013-09-03T23:59:59.000Z

70

On third homology of SL_2 and weak homotopy invariance.  

E-Print Network (OSTI)

The goal of the paper is to achieve - in the special case of the linear group SL_2 - some understanding of the relation between group homology and its A^1-invariant replacement. We discuss some of the general properties of A^1-invariant group homology, such as stabilization sequences and Grothendieck-Witt module structures. Together with very precise knowledge about refined Bloch groups, these methods allow to deduce that in general there is a rather large difference between group homology and its A^1-invariant version. In other words, weak homotopy invariance fails for SL_2 over many families of non-algebraically closed fields.

Kevin Hutchinson; Matthias Wendt

71

Tau protein binds to microtubules through a flexible array of distributed weak sites. Z Cell Biol  

E-Print Network (OSTI)

Abstract. Tau protein plays a role in the extension and maintenance of neuronal processes through a direct association with microtubules. To characterize the nature of this association, we have synthesized a collection of tau protein fragments and studied their binding properties. The relatively weak affinity of tau protein for microtubules (ti10- ' M) is concentrated in a large region containing three or four 18 amino acid repeated binding elements. These are separated by apparently flexible but less conserved linker sequences of 13-14 amino acids that do not bind. Within the repeats, the binding energy for microtubules is delocalized and derives from a series of weak interactions contributed by small groups of amino acids. These unusual char acteristics suggest tau protein can assume multiple conformations and can pivot and perhaps migrate on the surface of the microtubule. The flexible structure of the tau protein binding interaction may allow it to be easily displaced from the microtubule lattice and may have important consequences for its function. TAU protein is a microtubule-associated protein present In brain and other neuronal tissues (Binder et al., 1985; Drubin et al., 1986; Weingarten et al., 1975). It is found in the axonal microtubules of mature neurons (Binder et al., 1985) and in the axonlike elongated neurite processes synthesized by differentiating neurons in culture

Karena Butner; Marc W. Kirschner

1991-01-01T23:59:59.000Z

72

Weak measurements with a qubit meter  

E-Print Network (OSTI)

We derive schemes to measure the so-called weak values of quantum system observables by coupling of the system to a qubit meter system. We highlight, in particular, the meaning of the imaginary part of the weak values, and show how it can be measured directly on equal footing with the real part of the weak value. We present compact expressions for the weak value of single qubit observables and of product observables on qubit pairs. Experimental studies of the results are suggested with cold trapped ions.

Shengjun Wu; Klaus Mølmer

2009-09-04T23:59:59.000Z

73

Combustion Technologies Group  

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

Combustion Technologies Group Combustion research generates the fundamental physical and chemical knowledge on the interaction between flame and turbulence. Experimental and...

74

Theory and Modeling of Weakly Bound/Physisorbed Materials for Hydrogen Storage  

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

and Modeling of and Modeling of Weakly Bound/Physisorbed Materials for Hydrogen Storage Andrew Williamson Quantum Simulations Group Lawrence Livermore National Laboratory Tadashi Ogitsu Lawrence Livermore National Laboratory Yong-Hyun Kim, Mike Heben, and Shengbai Zhang National Renewable Energy Laboratory UCRL-209054 This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48. Outline * Storage by physisorption: - CNT, fullerenes, carbon aerogels - Doping, Decorating, Charging * Accuracy of Methods: DFT, QMC and Quantum Chemistry - Van der Waals interactions - * Use of DFT to screen for new compounds - 2 binding to doped fullerenes * LDA, GGA and ad-hoc corrections to pseudopotentials

75

Inclusive Particle Production Data in E+E- Interactions: Data from DOE laboratory experiments as compiled in data reviews by the Durham High Energy Physics Database Group  

DOE Data Explorer (OSTI)

A comprehensive compilation of experimental data on inclusive particle production in e+e- interactions is presented. Data are given in both tabular and graphical form for multiplicities and inclusive differential cross sections from experiments at all of the world`s high energy e+e- colliders. To facilitate comparison between the data sets, curves are also shown from the JETSET 7.4 Monte Carlo program. (Taken from the abstract of A Compilation of Inclusive Particle Production Data in E+E- Annihilation, G.D. Lafferty, P.I. Reeves, and M.R. Whalley, Journal of Physics G (Nuclear and Particle Physics), Volume 21, Number 12A, 1995.) The Durham High Energy Physics (HEP) Database Group makes these data, extracted from papers and data reviews, available in one place in an easy-to-access format. These data are also included in the Durham HEP Reaction Data Database which can be searched at http://durpdg.dur.ac.uk/spires/hepdata/reac.html.

Lafferty, G. D.; Reeves, P. I.; Whalley, M. R.

76

On the Structure of Weakly Acyclic Games  

E-Print Network (OSTI)

The class of weakly acyclic games, which includes potential games and dominance-solvable games, captures many practical application domains. In a weakly acyclic game, from any starting state, there is a sequence of better-response moves that leads to a pure Nash equilibrium; informally, these are games in which natural distributed dynamics, such as better-response dynamics, cannot enter inescapable oscillations. We establish a novel link between such games and the existence of pure Nash equilibria in subgames. Specifically, we show that the existence of a unique pure Nash equilibrium in every subgame implies the weak acyclicity of a game. In contrast, the possible existence of multiple pure Nash equilibria in every subgame is insufficient for weak acyclicity in general; here, we also systematically identify the special cases (in terms of the number of players and strategies) for which this is sufficient to guarantee weak acyclicity.

Fabrikant, Alex; Schapira, Michael

2011-01-01T23:59:59.000Z

77

The structure of weak shocks in quantum plasmas  

E-Print Network (OSTI)

The structure of a weak shock in a quantum plasma is studied, taking into account both dissipation terms due to thermal conduction and dispersive quantum terms due to the Bohm potential. Unlike quantum systems without dissipations, even a small thermal conduction may lead to a stationary shock structure. In the limit of zero quantum effects, the monotonic Burgers solution for the weak shock is recovered. Still, even small quantum terms make the structure non-monotonic with the shock driving a train of oscillations into the initial plasma. The oscillations propagate together with the shock. The oscillations become stronger as the role of Bohm potential increases in comparison with thermal conduction. The results could be of importance for laser-plasma interactions, such as inertial confinement fusion plasmas, and in astrophysical environments, as well as in condensed matter systems.

Bychkov, Vitaly; Marklund, Mattias

2008-01-01T23:59:59.000Z

78

Soluble Synthetic Analogs of Malaria Pigment: Structure of Mesohematin Anhydride [FeIII(MP-IX)]2 and Solution Interaction with Chloroquine  

Science Conference Proceedings (OSTI)

Changing the vinyl groups of hematin anhydride to either ethyl or hydrogen groups results in increased solubility (Por=porphyrin). Determination of the weak binding constants of the antimalarial drug chloroquine to dimers of these hematin anhydride analogues suggests that solution-phase heme/drug interactions alone are unlikely to be the origin of the action of the drug.

D Bohle; E Dodd; A Kosar; L Sharma; P Stephens; L Suarez; D Tazoo

2011-12-31T23:59:59.000Z

79

Physics Division, LANL: Neutron Science and Technology Group  

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

including supernova remnants, pulsar wind nebulae, active galactic nuclei, and gamma-ray bursts. The Weak Interactions team develops experiments to answer questions about the...

80

Using the WWW as the delivery mechanism for interactive, visulaization-based instructional modules: report of the ITiCSE '97 working group on visualization  

Science Conference Proceedings (OSTI)

Visualization has long been an important pedagogical tool in CS education. The widespread use of the Web and the introduction of Java, with its ability to present interactive animated applets and other types of animation, all provide opportunities to ...

Thomas Naps; Joseph Bergin; Ricardo Jiménez-Peris; Myles F. McNally; Marta Patiño-Martínez; Viera K. Proulx; Jorma Tarhio

1997-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Shock Waves in Weakly Compressed Granular Media  

E-Print Network (OSTI)

We experimentally probe nonlinear wave propagation in weakly compressed granular media, and observe a crossover from quasi-linear sound waves at low impact, to shock waves at high impact. We show that this crossover grows with the confining pressure $P_0$, whereas the shock wave speed is independent of $P_0$ --- two hallmarks of granular shocks predicted recently. The shocks exhibit powerlaw attenuation, which we model with a logarithmic law implying that local dissipation is weak. We show that elastic and potential energy balance in the leading part of the shocks.

Siet van den Wildenberg; Rogier van Loo; Martin van Hecke

2013-04-23T23:59:59.000Z

82

Hall Magnetohydrodynamics of weakly-ionized plasma  

E-Print Network (OSTI)

We show that the Hall scale in a weakly ionized plasma depends on the fractional ionization of the medium and, Hall MHD description becomes important whenever the ion-neutral collision frequency is comparable to the ion-gyration frequency, or, the ion-neutral collisional mean free path is smaller than the ion gyro-radius. Wave properties of a weakly-ionized plasma also depends on the fractional ionization and plasma Hall parameters, and whistler mode is the most dominant mode in such a medium. Thus Hall MHD description will be important in astrophysical disks, dark molecular clouds, neutron star crusts, and, solar and planetary atmosphere.

B. P. Pandey; Mark Wardle

2006-08-01T23:59:59.000Z

83

Weak Solutions for Dislocation Type Equations  

E-Print Network (OSTI)

We describe recent results obtained by G. Barles, P. Cardaliaguet, R. Monneau and the author recently. They are concerned with nonlocal Eikonal equations arising in the study of the dynamics of dislocation lines in crystals. These equations are nonlocal but also non monotone. We use a notion of weak solution to provide solutions for all time. Then, we discuss the link between these weak solutions and the classical viscosity solutions, and state some uniqueness results in particular cases. A counter-example to uniqueness is given.

Ley, Olivier

2008-01-01T23:59:59.000Z

84

Weak and Strong coupling regimes in plasmonic-QED  

E-Print Network (OSTI)

We present a quantum theory for the interaction of a two level emitter with surface plasmon polaritons confined in single-mode waveguide resonators. Based on the Green's function approach, we develop the conditions for the weak and strong coupling regimes by taking into account the sources of dissipation and decoherence: radiative and non-radiative decays, internal loss processes in the emitter, as well as propagation and leakage losses of the plasmons in the resonator. The theory is supported by numerical calculations for several quantum emitters, GaAs and CdSe quantum dots and NV centers together with different types of resonators constructed of hybrid, cylindrical or wedge waveguides. We further study the role of temperature and resonator length. Assuming realistic leakage rates, we find the existence of an optimal length at which strong coupling is possible. Our calculations show that the strong coupling regime in plasmonic resonators is accessible within current technology when working at very low temperatures (<4K). In the weak coupling regime our theory accounts for recent experimental results. By further optimization we find highly enhanced spontaneous emission with Purcell factors over 1000 at room temperature for NV-centers. We finally discuss more applications for quantum nonlinear optics and plasmon-plasmon interactions.

T. Hümmer; F. J. García-Vidal; L. Martín-Moreno; D. Zueco

2012-09-08T23:59:59.000Z

85

Controls Group  

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

Status and Schedule Safety and Training Divisions APS Engineering Support Division AES Groups Accelerator Systems Division ASD Groups X-ray Science Division XSD Groups...

86

Higgs Boson Production and Weak Boson Structure  

E-Print Network (OSTI)

The influence of the QCD structure of the weak bosons on the Higgs boson production in $e$-$p$ scattering is studied. The energy and Higgs boson mass dependence of the cross-section, following from the new contributions, is calculated.

Wojciech Slominski; Jerzy Szwed

1995-07-18T23:59:59.000Z

87

Hadronic Total Cross Sections (R) in E+E- Interactions: Data from DOE laboratory experiments as compiled in data reviews by the Durham High Energy Physics Database Group  

DOE Data Explorer (OSTI)

The Durham High Energy Physics (HEP) Database Group makes these data, extracted from papers and data reviews, available in one place in an easy-to-access format. The data are also included in the Durham HEP Reaction Data Database, which can be searched at http://durpdg.dur.ac.uk/spires/hepdata/reac.html.

Whalley, M. R.

88

Quantal Definition of the Weak Equivalence Principle  

E-Print Network (OSTI)

The present work analyzes the meaning of the Weak Equivalence Principle in the context of quantum mechanics. A quantal definition for this principle is introduced. This definition does not require the concept of trajectory and relies upon the phase shift induced by a gravitational field in the context of a quantum interference experiment of two coherent beams of particles. In other words, it resorts to wave properties of the system and not to classical concepts as the idea of trajectory.

Abel Camacho; Arturo Camacho-Guardian

2008-11-03T23:59:59.000Z

89

Heat capacity in weakly correlated liquids  

Science Conference Proceedings (OSTI)

Previously unavailable numerical data related to the heat capacity in two- and three-dimensional liquid Yukawa systems are obtained by means of fluctuation theory. The relations between thermal conductivity and diffusion constants are numerically studied and discussed. New approximation for heat capacity dependence on non-ideality parameter for weakly correlated systems of particles is proposed. Comparison of the obtained results to the existing theoretical and numerical data is discussed.

Khrustalyov, Yu. V.; Vaulina, O. S. [Joint Institute for High Temperatures RAS, 125412, Izhorskaya St., 13 bld.2, Moscow (Russian Federation); Moscow Institute of Physics and Technology, 117303, Kerchenskaya St., 1A bld.1, Moscow (Russian Federation); Koss, X. G. [Joint Institute for High Temperatures RAS, 125412, Izhorskaya St., 13 bld.2, Moscow (Russian Federation)

2012-12-15T23:59:59.000Z

90

Quantum groups  

Science Conference Proceedings (OSTI)

The theory of Quantum groups, although rather young, since the expression Quantum ... introduction of a suitable form of the quantum group, the algebra A ...

91

An Analysis of DES Cluster Simulations through the IMCAT and Shapelets Weak Lensing Pipelines  

E-Print Network (OSTI)

We have run two completely independent weak lensing analysis pipelines on a set of realistic simulated images of a massive galaxy cluster with a singular isothermal sphere profile (galaxy velocity dispersion sigma_v=1250 km/ sec). The suite of images was constructed using the simulation tools developed by the Dark Energy Survey. We find that both weak lensing pipelines can accurately recover the velocity dispersion of our simulated clusters, suggesting that current weak lensing tools are accurate enough for measuring the shear profile of massive clusters in upcoming large photometric surveys. We also demonstrate how choices of some cuts influence the final shear profile and sigma_v measurement. Analogously to the STEP program, we make all of these cluster simulation images publically available for other groups to analyze through their own weak lensing pipelines.

Gill, M S S; Draskovic, J P; Honscheid, K; Lin, H; Kuropatkin, N; Martini, P; Peeples, M; Rozo, E; Smith, G N; Weinberg, D H

2009-01-01T23:59:59.000Z

92

(Theory of weak interactions and related topics; and study of e sup + e sup minus interactions)  

Science Conference Proceedings (OSTI)

This report contains brief discussions on the following topics: Higher point anomalous amplitudes; topological phase of quantum gravity; chiral symmetry breaking at finite temperature; Skyrmions as representations of current algebras; D {ge} 4 critical phenomena: self-duality, infinite dimensional symmetries and hypercomplex analyticity; D {ge} 3 topological field theories: anionic membranes and division algebras, geometric quantization by the method of orbits; and novel non-perturbative approaches. (LSP)

Chang, Lay Nam; Tze, C.H.

1990-01-01T23:59:59.000Z

93

Supersymmetric Higgs Bosons in Weak Boson Fusion  

E-Print Network (OSTI)

We compute the complete supersymmetric next-to-leading order corrections to the production of a light Higgs boson in weak boson fusion. The size of the electroweak corrections is of similar order as the next-to-leading order corrections in the Standard Model. The supersymmetric QCD corrections turn out to be significantly smaller than their electroweak counterparts. These higher--order corrections are an important ingredient to a precision analysis of the (supersymmetric) Higgs sector at the LHC, either as a known correction factor or as a contribution to the theory error.

W. Hollik; T. Plehn; M. Rauch; H. Rzehak

2008-04-17T23:59:59.000Z

94

Bayesian Photometric Redshifts for Weak Lensing Applications  

E-Print Network (OSTI)

The next generation of weak gravitational lensing surveys is capable of generating good measurements of cosmological parameters, provided that, amongst other requirements, adequate redshift information is available for the background galaxies that are measured. It is frequently assumed that photometric redshift techniques provide the means to achieve this. Here we compare Bayesian and frequentist approaches to photometric redshift estimation, particularly at faint magnitudes. We identify and discuss the biases that are inherent in the various methods, and describe an optimum Bayesian method for extracting redshift distributions from photometric data.

Edward Edmondson; Lance Miller; Christian Wolf

2006-07-13T23:59:59.000Z

95

Weak reactions with light nuclei - 6He beta-decay as a test case for the nuclear weak current  

E-Print Network (OSTI)

We present a microscopic calculation of the 6He beta-decay into the ground state of 6Li. To this end we use the impulse approximation to describe the nuclear weak current. The ground state wave functions are obtained from the solution of the nuclear 6-body problem. The nucleonnucleon interaction is described via the J-matrix inverse scattering potential (JISP), and the nuclear problem is solved using the hyperspherical-harmonics approach. This approach results in numerical accuracy of about 2 per mil in the transition matrix element. Bearing in mind that the contribution of meson-exchange currents to the transition matrix element is about 5%, these results pave the way for accurate estimation of their effect.

Doron Gazit; Sergey Vaintraub; Nir Barnea

2009-01-18T23:59:59.000Z

96

Weak Bonds from a Semilocal Density Functional with the Right Ingredients  

E-Print Network (OSTI)

Computationally-efficient semilocal approximations of density functional theory at the level of the local spin density approximation (LSDA) or generalized gradient approximation (GGA) poorly describe weak interactions. We show improved descriptions for weak bonds (without loss of accuracy for strong ones) from a newly-developed semilocal meta-GGA (MGGA), by applying it to: 1) the binding energy curve of graphene adsorbed on a Ni (111) surface, where both chemi- and physisorption minima are present; 2) stacking of DNA/RNA nucleobases. We argue that this improvement comes from using the right MGGA dimensionless ingredient to recognize all degrees of orbital overlap.

Sun, Jianwei; Fang, Yuan; Haunschild, Robin; Hao, Pan; Ruzsinszky, Adrienn; Csonka, Gabor I; Scuseria, Gustavo E; Perdew, John P

2013-01-01T23:59:59.000Z

97

Single Photon Production in Hadronic Interactions: Data from DOE laboratory experiments as compiled in data reviews by the Durham High Energy Physics Database Group  

DOE Data Explorer (OSTI)

Vogelsang and Whalley in their 1997 paper, ôA Compilation of Data on Single and Double Prompt Photon Production in Hadron-Hadron Interactionsö published in volume 23 of Journal of Physics G (Nuclear and Particle Physics) present the compilation as well as ôan interpretation of these data in terms of the æstate-of-the-art NLO theory with specific emphasis on the uncertainties involved.ö They also say, ôComparisons of this theory with the individual data sets are made in order to indicate to the reader the scope and general status of the available data. For completeness, data on two-prompt-photon production are also included in a separate small section.ö The data gathered from the relevant collaborations at DOEÆs Fermilab are available, and so are data from related collaborations based at CERN. The Durham High Energy Physics (HEP) Database Group makes these data, extracted from papers and data reviews, available in one place in an easy-to-access format. These data are also included in the Durham HEP Reaction Data Database which can be searched at http://durpdg.dur.ac.uk/spires/hepdata/reac.html.

98

Weak Pressure Gradient Approximation and Its Analytical Solutions  

Science Conference Proceedings (OSTI)

A weak pressure gradient (WPG) approximation is introduced for parameterizing supradomain-scale (SDS) dynamics, and this method is compared to the relaxed form of the weak temperature gradient (WTG) approximation in the context of 3D, linearized, ...

David M. Romps

2012-09-01T23:59:59.000Z

99

Numerical Tests of the Weak Pressure Gradient Approximation  

Science Conference Proceedings (OSTI)

Cloud-resolving simulations of convection over a surface temperature hot spot are used to evaluate the weak pressure gradient (WPG) and weak temperature gradient (WTG) approximations. The premise of the relaxed form of WTG—that vertical velocity ...

David M. Romps

2012-09-01T23:59:59.000Z

100

Fatigue Weak-Link Density and Strength Distribution in High ...  

Science Conference Proceedings (OSTI)

Symposium, Fatigue and Corrosion Damage in Metallic Materials: Fundamentals, Modeling and Prevention. Presentation Title, Fatigue Weak-Link Density and ...

Note: This page contains sample records for the topic "group weak interactions" 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

Weakly Charged Cationic Nanoparticles Induce DNA Bending and Strand Separation  

SciTech Connect

The understanding of interactions between double stranded (ds) DNA and charged nanoparticles will have a broad bearing on many important applications from drug delivery [ 1 4 ] to DNAtemplated metallization. [ 5 , 6 ] Cationic nanoparticles (NPs) can bind to DNA, a negatively charged molecule, through a combination of electrostatic attraction, groove binding, and intercalation. Such binding events induce changes in the conformation of a DNA strand. In nature, DNA wraps around a cylindrical protein assembly (diameter and height of 6 nm) [ 7 ] with an 220 positive charge, [ 8 ] creating the complex known as chromatin. Wrapping and bending of DNA has also been achieved in the laboratory through the binding of highly charged species such as molecular assemblies, [ 9 , 10 ] cationic dendrimers, [ 11 , 12 ] and nanoparticles. [ 13 15 ] The charge of a nanoparticle plays a crucial role in its ability to induce DNA structural changes. If a nanoparticle has a highly positive surface charge density, the DNA is likely to wrap and bend upon binding to the nanoparticle [ 13 ] (as in the case of chromatin). On the other hand, if a nanoparticle is weakly charged it will not induce dsDNA compaction. [ 9 , 10 , 15 ] Consequently, there is a transition zone from extended to compact DNA conformations which depends on the chemical nature of the nanoparticle and occurs for polycations with charges between 5 and 10. [ 9 ] While the interactions between highly charged NPs and DNA have been extensively studied, the processes that occur within the transition zone are less explored.

Railsback, Justin [North Carolina State University; Singh, Abhishek [North Carolina State University; Pearce, Ryan [North Carolina State University; McKnight, Timothy E [ORNL; Collazo, Ramon [North Carolina State University; Sitar, Zlatko [ORNL; Yingling, Yaroslava [North Carolina State University; Melechko, Anatoli Vasilievich [ORNL

2012-01-01T23:59:59.000Z

102

Modeling active electrolocation in weakly electric fish  

E-Print Network (OSTI)

In this paper, we provide a mathematical model for the electrolocation in weakly electric fishes. We first investigate the forward complex conductivity problem and derive the approx- imate boundary conditions on the skin of the fish. Then we provide a dipole approximation for small targets away from the fish. Based on this approximation, we obtain a non-iterative location search algorithm using multi-frequency measurements. We present numerical experi- ments to illustrate the performance and the stability of the proposed multi-frequency location search algorithm. Finally, in the case of disk- and ellipse-shaped targets, we provide a method to reconstruct separately the conductivity, the permittivity, and the size of the targets from multi-frequency measurements.

Ammari, Habib; Garnier, Josselin

2012-01-01T23:59:59.000Z

103

Composite Weak Bosons at the Large Hadron Collider  

E-Print Network (OSTI)

In a composite model of the weak bosons the excited bosons, in particular the p-wave bosons, are studied. The state with the lowest mass is identified with the boson, which has been discovered recently at the "Large Hadron Collider" at CERN. Specific properties of the excited weak bosons are studied, in particular their decays into weak bosons and into photons.

Harald Fritzsch

2013-07-24T23:59:59.000Z

104

Binary Bose-Einstein Condensate Mixtures in Weakly and Strongly Segregated Phases  

E-Print Network (OSTI)

We perform a mean-field study of the binary Bose-Einstein Condensate mixtures as the function of the mutual repulsive interaction strength. In the phase segregated regime, we find that there are two distinct phases: the weakly segregated phase characterized by a ‘penetration depth ’ and the strongly segregated phase by a healing length. In the weakly segregated phase the symmetry of the shape of each condensate will not take that of the trap because of the finite surface tension, but their total density profile still does. In the strongly segregated phase even the total density profile takes a different symmetry from that of the trap because of the mutual exclusion of the condensates. The lower critical condensate atom number to observe the complete phase segregation is discussed. A comparison to recent experimental data suggests that the weakly segregated phase has been observed. PACS#: 03.75.Fi 1

P. Ao; S. T. Chui

2008-01-01T23:59:59.000Z

105

From Nearby to High Redshift Compact Group of Galaxies  

E-Print Network (OSTI)

Nearby Compact Groups of Galaxies (CGs) are very complex systems, tracing their history is a challenge (e.g. Stephan's Quintet). The presence of a diffuse X-rays emission that often peaks in the center of CGs shows that CGs are bound structures, they show numerous signs of interaction but their lifetime in much longer than their crossing times. Hickson CGs clearly show different stages of evolution, from weakly interacting galaxies to merging systems. CGs infalling into clusters may provide a mechanism to form clusters at high redshifts (e.g. in A1367). Massive versions of today's CGs may have been the best candidate precursors of fossil groups. Do CGs mimic the high redshift universe? This is still an open question. Indeed, their high density and low velocity dispersion should induce a high interaction rate and fast merging, CGs are nevertheless long-lived structures. On the other hand, there is probably no (or a few) isolated CGs in the high z universe. CGs may fuel high z clusters, they may produce fossil groups and fossil ellipticals. CGs at high z are difficult to detect and are still to be discovered. Interpretation of distant kinematics of galaxies may need nearby sample of galaxies to disentangle beam-smearing from evolutionary effects (e.g. HCG 31). Beam smearing effects may bias the Tully-Fisher relation (shifted towards lower M/L).

Philippe Amram; Chantal Balkowski; Claudia Mendes de Oliveira; Henri Plana; Benoit Epinat

2006-10-30T23:59:59.000Z

106

Atomic Inference from Weak Gravitational Lensing Data  

SciTech Connect

We present a novel approach to reconstructing the projected mass distribution from the sparse and noisy weak gravitational lensing shear data. The reconstructions are regularized via the knowledge gained from numerical simulations of clusters, with trial mass distributions constructed from n NFW profile ellipsoidal components. The parameters of these ''atoms'' are distributed a priori as in the simulated clusters. Sampling the mass distributions from the atom parameter probability density function allows estimates of the properties of the mass distribution to be generated, with error bars. The appropriate number of atoms is inferred from the data itself via the Bayesian evidence, and is typically found to be small, reecting the quality of the data. Ensemble average mass maps are found to be robust to the details of the noise realization, and succeed in recovering the demonstration input mass distribution (from a realistic simulated cluster) over a wide range of scales. As an application of such a reliable mapping algorithm, we comment on the residuals of the reconstruction and the implications for predicting convergence and shear at specific points on the sky.

Marshall, Phil; /KIPAC, Menlo Park

2005-12-14T23:59:59.000Z

107

A Primer for Electro-Weak Induced Low Energy Nuclear Reactions  

E-Print Network (OSTI)

In a series of papers, cited in the main body of the paper below, detailed calculations have been presented which show that electromagnetic and weak interactions can induce low energy nuclear reactions to occur with observable rates for a variety of processes. A common element in all these applications is that the electromagnetic energy stored in many relatively slow moving electrons can -under appropriate circumstances- be collectively transferred into fewer, much faster electrons with energies sufficient for the latter to combine with protons (or deuterons, if present) to produce neutrons via weak interactions. The produced neutrons can then initiate low energy nuclear reactions through further nuclear transmutations. The aim of this paper is to extend and enlarge upon various examples analyzed previously, present simplified order of magnitude estimates for each and to illuminate a common unifying theme amongst all of them.

Srivastava, Y N; Larsen, L

2008-01-01T23:59:59.000Z

108

A Primer for Electro-Weak Induced Low Energy Nuclear Reactions  

E-Print Network (OSTI)

In a series of papers, cited in the main body of the paper below, detailed calculations have been presented which show that electromagnetic and weak interactions can induce low energy nuclear reactions to occur with observable rates for a variety of processes. A common element in all these applications is that the electromagnetic energy stored in many relatively slow moving electrons can -under appropriate circumstances- be collectively transferred into fewer, much faster electrons with energies sufficient for the latter to combine with protons (or deuterons, if present) to produce neutrons via weak interactions. The produced neutrons can then initiate low energy nuclear reactions through further nuclear transmutations. The aim of this paper is to extend and enlarge upon various examples analyzed previously, present simplified order of magnitude estimates for each and to illuminate a common unifying theme amongst all of them.

Y. N. Srivastava; A. Widom; L. Larsen

2008-10-01T23:59:59.000Z

109

Carbon Materials Breakout Group  

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

Materials Breakout Group Process Materials Breakout Group Process * Day 2, Thursday - Review results of Day 1 and modify if needed - Identify critical R&D needs - Outline R&D plan with key milestones - Report results to plenary Carbon Materials Breakout Group * Key Results - Target: get the science right to engineer carbon materials for hydrogen storage * Integrate theory, experiment, engineering * Understand mechanisms, effects, and interactions ranging from physisorption to chemisorption - Theory * Provide "directional" guidance for experiments (and vice- versa) * Provide baseline theory to elucidate parameters affecting the number and type of binding sites and the heat of their interaction with H2 (∆H ) for a broad range of (highly) modified carbon materials

110

Weak Hopf Algebras unify the Hennings-Kauffman-Radford and the Reshetikhin-Turaev invariant  

E-Print Network (OSTI)

We present an invariant of connected and oriented closed 3-manifolds based on a coribbon Weak Hopf Algebra H with a suitable left-integral. Our invariant can be understood as the generalization to Weak Hopf Algebras of the Hennings-Kauffman-Radford evaluation of an unoriented framed link using a dual quantum-trace. This quantum trace satisfies conditions that render the link evaluation invariant under Kirby moves. If H is a suitable finite-dimensional Hopf algebra (not weak), our invariant reduces to the Kauffman-Radford invariant for the dual of H. If H is the Weak Hopf Algebra Tannaka-Krein reconstructed from a modular category C, our invariant agrees with the Reshetikhin-Turaev invariant. In particular, the proof of invariance of the Reshetikhin-Turaev invariant becomes as simple as that of the Kauffman-Radford invariant. Modularity of C is only used once in order to show that the invariant is non-zero; apart from this, a fusion category with ribbon structure would be sufficient. Our generalization of the Kauffman-Radford invariant for a Weak Hopf Algebra H and the Reshetikhin-Turaev invariant for its category of finite-dimensional comodules C=M^H always agree by construction. There is no need to consider a quotient of the representation category modulo 'negligible morphisms' at any stage, and our construction contains the Reshetikhin-Turaev invariant for an arbitrary modular category C, whether its relationship with some quantum group is known or not.

Hendryk Pfeiffer

2011-05-02T23:59:59.000Z

111

WEAK SPECTRAL MAPPING THEOREMS FOR C0GROUPS ASSOCIATED TO TRANSPORT EQUATIONS IN SLAB GEOMETRY  

E-Print Network (OSTI)

to the physical relevance of vacuum boundary conditions in nuclear reactor theory [6]. We cite however some works Spectral theory of C0-semigroups governing neutron transport equations with vacuum boundary con- ditions is a classical subject of kinetic theory which goes back to the fifties and sixties, see [12], [10

Lods, Bertrand

112

Weak nuclear forces cause the strong nuclear force  

E-Print Network (OSTI)

We determine the strength of the weak nuclear force which holds the lattices of the elementary particles together. We also determine the strength of the strong nuclear force which emanates from the sides of the nuclear lattices. The strong force is the sum of the unsaturated weak forces at the surface of the nuclear lattices. The strong force is then about ten to the power of 6 times stronger than the weak force between two lattice points.

E. L. Koschmieder

2007-12-11T23:59:59.000Z

113

Detection and Control of Individual Nuclear Spins Using a Weakly Coupled Electron Spin  

Science Conference Proceedings (OSTI)

We experimentally isolate, characterize, and coherently control up to six individual nuclear spins that are weakly coupled to an electron spin in diamond. Our method employs multipulse sequences on the electron spin that resonantly amplify the interaction with a selected nuclear spin and at the same time dynamically suppress decoherence caused by the rest of the spin bath. We are able to address nuclear spins with interaction strengths that are an order of magnitude smaller than the electron spin dephasing rate. Our results provide a route towards tomography with single-nuclear-spin sensitivity and greatly extend the number of available quantum bits for quantum information processing in diamond.

Taminiau, T.H.; Wagenaar, J.J.T.; van der Sar, T.; Jelezko, F.; Dobrovitski, Viatcheslav V.; Hanson, R.

2012-09-28T23:59:59.000Z

114

From Nearby to High Redshift Compact Group of Galaxies  

E-Print Network (OSTI)

Nearby Compact Groups of Galaxies (CGs) are very complex systems, tracing their history is a challenge (e.g. Stephan's Quintet). The presence of a diffuse X-rays emission that often peaks in the center of CGs shows that CGs are bound structures, they show numerous signs of interaction but their lifetime in much longer than their crossing times. Hickson CGs clearly show different stages of evolution, from weakly interacting galaxies to merging systems. CGs infalling into clusters may provide a mechanism to form clusters at high redshifts (e.g. in A1367). Massive versions of today's CGs may have been the best candidate precursors of fossil groups. Do CGs mimic the high redshift universe? This is still an open question. Indeed, their high density and low velocity dispersion should induce a high interaction rate and fast merging, CGs are nevertheless long-lived structures. On the other hand, there is probably no (or a few) isolated CGs in the high z universe. CGs may fuel high z clusters, they may produce fossil ...

Amram, P; De Oliveira, C M; Plana, H; Epinat, B; Amram, Philippe; Balkowski, Chantal; Oliveira, Claudia Mendes de; Plana, Henri; Epinat, Benoit

2006-01-01T23:59:59.000Z

115

Microscopic Description of Entanglements in Polyethylene Networks and Melts: Strong, Weak, Pairwise, and Collective Attributes  

E-Print Network (OSTI)

We present atomistic molecular dynamics simulations of two Polyethylene systems where all entanglements are trapped: a perfect network, and a melt with grafted chain ends. We examine microscopically at what level topological constraints can be considered as a collective entanglement effect, as in tube model theories, or as certain pairwise uncrossability interactions, as in slip-link models. A pairwise parameter, which varies between these limiting cases, shows that, for the systems studied, the character of the entanglement environment is more pairwise than collective. We employ a novel methodology, which analyzes entanglement constraints into a complete set of pairwise interactions, similar to slip links. Entanglement confinement is assembled by a plethora of links, with a spectrum of confinement strengths, from strong to weak. The strength of interactions is quantified through a link `persistence', which is the fraction of time for which the links are active. By weighting links according to their strength, we show that confinement is imposed mainly by the strong ones, and that the weak, trapped, uncrossability interactions cannot contribute to the low frequency modulus of an elastomer, or the plateau modulus of a melt. A self-consistent scheme for mapping topological constraints to specific, strong binary links, according to a given entanglement density, is proposed and validated. Our results demonstrate that slip links can be viewed as the strongest pairwise interactions of a collective entanglement environment. The methodology developed provides a basis for bridging the gap between atomistic simulations and mesoscopic slip link models.

Stefanos D. Anogiannakis; Christos Tzoumanekas; Doros N. Theodorou

2012-12-06T23:59:59.000Z

116

Resonant Wave Interactions in the Equatorial Waveguide  

Science Conference Proceedings (OSTI)

Weakly nonlinear interactions among equatorial waves have been explored in this paper using the adiabatic version of the equatorial ?-plane primitive equations in isobaric coordinates. Assuming rigid lid vertical boundary conditions, the ...

Carlos F. M. Raupp; Pedro L. Silva Dias; Esteban G. Tabak; Paul Milewski

2008-11-01T23:59:59.000Z

117

Higgs Production via Gluon-Induced Weak Boson Fusion  

E-Print Network (OSTI)

We present a calculation that allows for an estimation of the NNLO contributions to the Higgs production in the weak boson fusion channel. A possible deterioration of this important channel for the Higgs discoveries at the LHC can be ruled out by this calculation due to the small remaining cross section after the weak boson cuts.

Jens Vollinga

2008-09-22T23:59:59.000Z

118

Constraints on Dark Energy Models from Weak Gravity Conjecture  

E-Print Network (OSTI)

We study the constraints on the dark energy model with constant equation of state parameter $w=p/\\rho$ and the holographic dark energy model by using the weak gravity conjecture. The combination of weak gravity conjecture and the observational data gives $wenergy model realized by a scalar field is in swampland.

Chen, Ximing; Gong, Yungui

2008-01-01T23:59:59.000Z

119

Constraints on Dark Energy Models from Weak Gravity Conjecture  

E-Print Network (OSTI)

We study the constraints on the dark energy model with constant equation of state parameter $w=p/\\rho$ and the holographic dark energy model by using the weak gravity conjecture. The combination of weak gravity conjecture and the observational data gives $wenergy model realized by a scalar field is in swampland.

Ximing Chen; Jie Liu; Yungui Gong

2008-06-15T23:59:59.000Z

120

Processing on Information Fusion of Weak Electrical Signals in Plants  

Science Conference Proceedings (OSTI)

Information transmission of weak electrical signals in Bellis perennis was inosculated by a touching test system of self-made double shields with platinum sensors. Tested data of electrical signals denoised by the wavelet soft threshold and using Gaussian ... Keywords: intelligent control, information fusion, RBF neural networks, wavelet soft threshold denoising, weak electrical signal, Bellis perennis

Lanzhou Wang; Jinli Ding

2010-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Measurement of the Weak Mixing Angle in Moller Scattering  

DOE Green Energy (OSTI)

The weak mixing parameter, sin{sup 2} {theta}{sub w}, is one of the fundamental parameters of the Standard Model. Its tree-level value has been measured with high precision at energies near the Z{sup 0} pole; however, due to radiative corrections at the one-loop level, the value of sin{sup 2} {theta}{sub w} is expected to change with the interaction energy. As a result, a measurement of sin{sup 2} {theta}{sub w} at low energy (Q{sup 2} << m{sub Z}, where Q{sup 2} is the momentum transfer and m{sub Z} is the Z boson mass), provides a test of the Standard Model at the one-loop level, and a probe for new physics beyond the Standard Model. One way of obtaining sin{sup 2} {theta}{sub w} at low energy is from measuring the left-right, parity-violating asymmetry in electron-electron (Moeller) scattering: A{sub PV} = {sigma}{sub R}-{sigma}{sub L}/{sigma}{sub R}+{sigma}{sub L}, where {sigma}{sub R} and {sigma}{sub L} are the cross sections for right- and left-handed incident electrons, respectively. The parity violating asymmetry is proportional to the pseudo-scalar weak neutral current coupling in Moeller scattering, g{sub ee}. At tree level g{sub ee} = (1/4 -sin{sup 2} {theta}{sub w}). A precision measurement of the parity-violating asymmetry in Moeller scattering was performed by Experiment E158 at the Stanford Linear Accelerator Center (SLAC). During the experiment, {approx}50 GeV longitudinally polarized electrons scattered off unpolarized atomic electrons in a liquid hydrogen target, corresponding to an average momentum transfer Q{sup 2} {approx} 0.03 (GeV/c){sup 2}. The tree-level prediction for A{sub PV} at such energy is {approx}300 ppb. However one-loop radiative corrections reduce its value by {approx}40%. This document reports the E158 results from the 2002 data collection period. The parity-violating asymmetry was found to be A{sub PV} = -160 {+-} 21 (stat.) {+-} 17 (syst.) ppb, which represents the first observation of a parity-violating asymmetry in Moeller scattering. This value corresponds to a weak mixing angle at Q{sup 2} = 0.026 (GeV/c){sup 2} of sin{sup 2} {theta}{sub w{ovr MS}} = 0.2379 {+-} 0.0016 (stat.) {+-} 0.0013 (syst.), which is -0.3 standard deviations away from the Standard Model prediction: sin{sup 2} {theta}{sub w{ovr MS}}{sup predicted} = 0.2385 {+-} 0.0006 (theory). The E158 measurement of sin{sup 2} {theta}{sub w} at a precision of {delta}(sin{sup 2} {theta}{sub w}) = 0.0020 provides new physics sensitivity at the TeV scale.

Klejda, B.

2005-01-28T23:59:59.000Z

122

MEA BREAKOUT GROUP  

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

MEA BREAKOUT GROUP MEA BREAKOUT GROUP TOPICS FOCUSED ON CCMs * IONOMER * CATALYST LAYER * PERFORMANCE * DEGRADATION * FUNDAMENTAL STUDIES IONOMER * DEVELOP IMPROVED IONOMERS: PERFLUORINATED IONOMERS (O2 SOLUBILITY) HYDROCARBON IONOMERS * ANODE FLOODING ISSUES, CATHODE DRYOUT ISSUES: - DEVELOP SEPARATE IONOMERS FOR ANODE/CATHODE - IONOMER CHEMISTRY * IONOMER/CATALYST INTERACTION * CL / MEMBRANE INTERACTION * IMPROVED CL/M INTERFACES - IONOMER CROSSLINKING CATALYST LAYER * CATALYST CHALLENGES IN ANODE SIDE * FOCUS ON NON-PGM CATALYSTS * INK FORMULATION * CCM VS. GDE * DELAMINATION PERFORMANCE * BACKUP POWER APPLICATION - STATUS: 60C, 0.5V, 0.2W/CM2 (DEGRADATION ISSUES) - TARGETS: SHOULD BE SET CONSISTENT WITH DOE STATIONARY TARGETS (2015) * AUTOMOTIVE APPLICATION - INCREASE POWER DENSITY TO >0.5W/CM2

123

Entangled state generation with an intrinsically pure single-photon source and a weak coherent source  

E-Print Network (OSTI)

We report on the experimental generation of an entangled state with a spectrally pure heralded single-photon state and a weak coherent state. By choosing group-velocity matching in the nonlinear crystal, our system for producing entangled photons was 60 times brighter than that in the earlier experiment [Phys. Rev. Lett. 90, 240401 (2003)], with no need of bandpass filters. This entanglement system is useful for quantum information protocols that require indistinguishable photons from independent sources.

Rui-Bo Jin; Ryosuke Shimizu; Fumihiro Kaneda; Yasuyoshi Mitsumori; Hideo Kosaka; Keiichi Edamatsu

2013-03-12T23:59:59.000Z

124

Quantum interference terms in nonmesonic weak decay of $?$-hypernuclei within a RPA formalism  

E-Print Network (OSTI)

Single and double coincidence nucleon spectra in the $\\Lambda$-hypernuclei weak decay are evaluated and discussed using a microscopic formalism. Nuclear matter is employed together with the local density approximation which allows us to analyze the $^{12}_{\\Lambda}C$ hypernucleus non-mesonic weak decay. Final state interactions (FSI) are included via the first order (in the nuclear residual interaction) terms to the RPA, where the strong residual interaction is modelled by a Bonn potential. At this level of approximation, these FSI are pure quantum interference terms between the primary decay $(\\Lambda N \\to NN)$ and $(\\Lambda N \\to NN \\to NN)$, where the strong interaction is responsible for the last piece in the second reaction. Also the Pauli exchange contributions are explicitly evaluated. We show that the inclusion of Pauli exchange terms is important. A comparison with data is made. We conclude that the limitations in phase space in the RPA makes this approximation inadequate to reproduce the nucleon spectra. This fact, does not allow us to draw a definite conclusion about the importance of the interference terms.

E. Bauer

2007-07-30T23:59:59.000Z

125

Examining the Effectiveness of Electronic Group Communication Technologies: The Role of the Conversation Interface  

E-Print Network (OSTI)

... group communication. Electronic group communication is a key process through which people can maintain communities of practice and leverage the strength of weak ties. Even though prior empirical investigations of electronic group communication have been successful at providing evidence for its effectiveness, these prior studies have not adequately dealt with the differences in the types of technology implementations of electronic group communication. We argue that different social and technical designs of electronic group communication technologies will influence various aspects of electronic group communication, such as level of participation, patterns of interaction and genres of communicative purposes. We propose and define the notion of conversation interface to be an important factor in electronic group communications. This paper illustrates the characteristics of the conversation interface and derives propositions concerning the impacts of conversation interface on electronic group communication based on prior theory. We also conduct an exploratory investigation of actual electronic group communication technologies to highlight the importance of the conversation interface factor. The paper concludes with discussions and directions for future research on electronic group communications.

Mani R. Subramani; Jungpil Hahn

2000-01-01T23:59:59.000Z

126

Experimental Investigation of Weak Non-Mesonic Decay of 10Be(Lambda)Hypernuclei at CEBAF  

E-Print Network (OSTI)

Hypernuclei are convenient laboratory to study the baryon-baryon weak interaction and associated effective Hamiltonian. The strangeness changing process, in which a Lambda hyperon converts to a neutron with a release up to 176 MeV, provides a clear signal for a conversion of an s-quark to a d-quark. We propose to perform a non-mesonic weak decay study of 10Be(Lambda)hypernuclei using the (e,eK) reaction. These investigations will fully utilize the unique parameters of the CEBAF CW electron beam and RF system and are enabled by (1) the use of new detector for alpha particles based on the recently developed RF timing technique with picosecond resolution and (2) the small angle and large acceptance kaon spectrometer-HKS in Hall C.

S. Majewski; L. Majling; A. Margaryan; L. Tang

2005-08-05T23:59:59.000Z

127

Constraining the Leading Weak Axial Two-body Current by SNO and Super-K  

E-Print Network (OSTI)

We analyze the Sudbury Neutrino Observatory (SNO) and Super-Kamiokande (SK) data on charged current (CC), neutral current (NC) and neutrino electron elastic scattering (ES) reactions to constrain the leading weak axial two-body current parameterized by L_1A. This two-body current is the dominant uncertainty of every low energy weak interaction deuteron breakup process, including SNO's CC and NC reactions. Our method shows that the theoretical inputs to SNO's determination of the CC and NC fluxes can be self-calibrated, be calibrated by SK, or be calibrated by reactor data. The only assumption made is that the total flux of active neutrinos has the standard ^8B spectral shape (but distortions in the electron neutrino spectrum are allowed). We show that SNO's conclusion about the inconsistency of the no-flavor-conversion hypothesis does not contain significant theoretical uncertainty, and we determine the magnitude of the active solar neutrino flux.

Jiunn-Wei Chen; Karsten M. Heeger; R. G. Hamish Robertson

2002-10-24T23:59:59.000Z

128

T-705: Linux Kernel Weakness in Sequence Number Generation Facilitates  

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

05: Linux Kernel Weakness in Sequence Number Generation 05: Linux Kernel Weakness in Sequence Number Generation Facilitates Packet Injection Attacks T-705: Linux Kernel Weakness in Sequence Number Generation Facilitates Packet Injection Attacks August 30, 2011 - 3:46am Addthis PROBLEM: A remote user can conduct packet injection attacks. PLATFORM: Linux Kernel ABSTRACT: Linux Kernel Weakness in Sequence Number Generation Facilitates Packet Injection Attacks. reference LINKS: SecurityTracker Alert ID: 1025977 CVE-2011-3188 (under review) The Linux Kernel Archives IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in the Linux Kernel. A remote user can conduct packet injection attacks. The kernel's sequence number generation function uses partial MD4 with 24-bits unguessable. A remote user may be able to brute-force guess a valid sequence number to inject a packet into a

129

Violation of the Weak Equivalence Principle in Bekenstein's theory  

E-Print Network (OSTI)

Bekenstein has shown that violation of Weak Equivalence Principle is strongly supressed in his model of charge variation. In this paper, it is shown that nuclear magnetic energy is large enough to produce observable effects in Eotvos experiments.

L. Kraiselburd; H. Vucetich

2009-02-24T23:59:59.000Z

130

Multiscale Large Eddy States in Weakly Stratified Planetary Boundary Layers  

Science Conference Proceedings (OSTI)

We first discuss observations of two classes of two-dimensional large eddy states in weakly stratified atmospheric boundary layers. One class is characterized by large eddies with a single horizontal scale. The other contains multiscale large ...

Pierre D. Mourad; Robert A. Brown

1990-02-01T23:59:59.000Z

131

T-728: Apache Tomcat HTTP DIGEST Authentication Weaknesses Let...  

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

not checked realm values were not checked the server secret was hard-coded to a known string The result of these weaknesses is that DIGEST authentication was only as secure as...

132

Corbino-geometry Josephson weak links in thin superconducting films  

Science Conference Proceedings (OSTI)

I consider a Corbino-geometry superconducting-normal-superconducting Josephson weak link in a thin superconducting film, in which current enters at the origin, flows outward, passes through an annular Josephson weak link, and leaves radially. In contrast to sandwich-type annular Josephson junctions, in which the gauge-invariant phase difference obeys the sine-Gordon equation, here the gauge-invariant phase difference obeys an integral equation. I present exact solutions for the gauge-invariant phase difference across the weak link when it contains an integral number N of Josephson vortices and the current is zero. I then study the dynamics when a current is applied, and I derive the effective resistance and the viscous drag coefficient; I compare these results with those in sandwich-type junctions. I also calculate the critical current when there is no Josephson vortex in the weak link but there is a Pearl vortex nearby.

Clem, John R.

2010-11-29T23:59:59.000Z

133

Boils and Turbulence in a Weakly Stratified Shallow Tidal Sea  

Science Conference Proceedings (OSTI)

Measurements of turbulence are made in a weakly but variably stratified region of tidal straining in the eastern Irish Sea using turbulence sensors profiling vertically through the water column on the Fast Light Yo-yo (FLY) profiler and ...

S. A. Thorpe; J. A. M. Green; J. H. Simpson; T. R. Osborn; W. A. M. Nimmo Smith

2008-08-01T23:59:59.000Z

134

The Particle Adventure | What holds it together? | Interaction summary  

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

Interaction summary Interaction summary Interaction summary This is a summary of the different interactions, their force carrier particles, and what particles they act on: Which fundamental interaction is responsible for: Friction? Answer Friction is caused by residual electromagnetic interactions between the atoms of the two materials. Nuclear bonding? Answer Nuclear bonding is caused by residual strong interactions between the various parts of the nucleus. Planetary orbits? Answer The planets orbit because of the gravity that attracts them to the sun! Even though gravity is a relatively weak force, it still has very important effects on the world. Other questions: Which interactions act on neutrinos? Answer Weak and Gravity Which interaction has heavy carriers? Answer Weak (W+, W-, and Z)

135

N=1 RG Flows, Product Groups, and a-Maximization  

E-Print Network (OSTI)

We explore new IR phenomena and dualities, arising for product groups, in the context of N=1 supersymmetric gauge theories. The RG running of the multiple couplings can radically affect each other. For example, an otherwise IR interacting coupling can be driven to be instead IR free by an arbitrarily small, but non-zero, initial value of another coupling. Or an otherwise IR free coupling can be driven to be instead IR interacting by an arbitrarily small non-zero initial value of another coupling. We explore these and other phenomena in N=1 examples, where exact results can be obtained using a-maximization. We also explore the various possible dual gauge theories, e.g. by dualizing one gauge group with the other treated as a weakly gauged flavor symmetry, along with previously proposed duals for the theories deformed by A_k-type Landau-Ginzburg superpotentials. We note that this latter duality, and all similar duality examples, always have non-empty superconformal windows, within which both the electric and dual A_k superpotentials are relevant.

Edwin Barnes; Ken Intriligator; Brian Wecht; Jason Wright

2005-02-03T23:59:59.000Z

136

Weak and strong regimes of incompressible magnetohydrodynamic turbulence  

Science Conference Proceedings (OSTI)

It is shown that in the framework of the weak turbulence theory, the autocorrelation and cascade time scales are always of the same order of magnitude. This means that, contrary to the general belief, any model of turbulence that implies a large number of collisions among wave packets for an efficient energy cascade (such as the Iroshnikov-Kraichnan model) is not compatible with the weak turbulence theory.

Gogoberidze, G. [Centre for Plasma Astrophysics, K. U. Leuven, Celestijnenlaan 200B, 3001 Leuven (Belgium); Georgian National Astrophysical Observatory, 2a Kazbegi Ave., 0160 Tbilisi, Georgia (United States); Mahajan, S. M. [Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States); Poedts, S. [Centre for Plasma Astrophysics, K. U. Leuven, Celestijnenlaan 200B, 3001 Leuven (Belgium)

2009-07-15T23:59:59.000Z

137

Weak rigidity in almost-thermodynamic material schemes  

SciTech Connect

To avoid the restrictions that the Born rigidity supposes for the motions in relativity, the definition of a weakly rigid almost-thermodynamic material scheme is proposed. From it the relativistic incompressibility condition given by Ferrando and Olivert is obtained. Moreover, it is proved that, for the weakly rigid irrotational and geodesic almost-thermodynamic material schemes, the scalar curvature of the Landau manifolds is constant along the streamlines.

del Olmo, V.; Olivert, J.

1985-06-01T23:59:59.000Z

138

Weak coupling limits in a stochastic model of heat conduction  

E-Print Network (OSTI)

We study the Brownian momentum process, a model of heat conduction, weakly coupled to heat baths. In two different settings of weak coupling to the heat baths, we study the non-equilibrium steady state and its proximity to the local equilibrium measure in terms of the strength of coupling. For three and four site systems, we obtain the two-point correlation function and show it is generically not multilinear.

Redig, Frank

2011-01-01T23:59:59.000Z

139

Rate of decoherence for an electron weakly coupled to a phonon gas  

E-Print Network (OSTI)

We study the dynamics of an electron weakly coupled to a phonon gas. The initial state of the electron is the superposition of two spatially localized distant bumps moving towards each other, and the phonons are in a thermal state. We investigate the dynamics of the system in the kinetic regime and show that the time evolution makes the non-diagonal terms of the density matrix of the electron decay, destroying the interference between the two bumps. We show that such a damping effect is exponential in time, and the related decay rate is proportional to the total scattering cross section of the electron-phonon interaction.

Riccardo Adami; Laszlo Erdos

2008-02-08T23:59:59.000Z

140

Perturbative analysis of sheared flow Kelvin-Helmholtz instability in a weakly relativistic magnetized electron fluid  

Science Conference Proceedings (OSTI)

In the interaction of intense lasers with matter/plasma, energetic electrons having relativistic energies get created. These energetic electrons can often have sheared flow profiles as they propagate through the plasma medium. In an earlier study [Phys. Plasmas 17, 022101 (2010)], it was shown that a relativistic sheared electron flow modifies the growth rate and threshold condition of the conventional Kelvin-Helmholtz instability. A perturbative analytic treatment for the case of weakly relativistic regime has been provided here. It provides good agreement with the numerical results obtained earlier.

Sundar, Sita; Das, Amita; Kaw, Predhiman [Institute for Plasma Research, Bhat, Gandhinagar-382428 (India)

2012-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Testing the Standard Model by precision measurement of the weak charges of quarks  

SciTech Connect

In a global analysis of the latest parity-violating electron scattering measurements on nuclear targets, we demonstrate a significant improvement in the experimental knowledge of the weak neutral-current lepton-quark interactions at low-energy. The precision of this new result, combined with earlier atomic parity-violation measurements, limits the magnitude of possible contributions from physics beyond the Standard Model - setting a model-independent, lower-bound on the scale of new physics at ~1 TeV.

Ross Young; Roger Carlini; Anthony Thomas; Julie Roche

2007-05-01T23:59:59.000Z

142

Kinetic equilibrium of iron in the atmospheres of cool dwarf stars II. Weak Fe I lines in the solar spectrum  

E-Print Network (OSTI)

NLTE line formation calculations of FeI in the solar atmosphere are extended to include weak optical lines. Previously established atomic models are used to discriminate between different ways of treating collisional interaction processes. To derive a common solar FeI abundance from both strong and weak lines, fine-tuning of the microturbulence velocity parameter and the van-der- Waals damping constants is required. The solar FeI abundances based on all available f-values are dominated by the large scatter already found for the stronger lines. In particular the bulk of the data from the work of May et al. and O'Brian et al. is not adequate for accurate abundance work. Based on f-values measured by the Hannover and Oxford groups alone, the FeI LTE abundances are eps(FeI,Sun)=7.57 for the empirical and eps(FeI,Sun) = 7.48 ... 7.51 for the line-blanketed solar model. The solar Fe ionization equilibrium obtained for different atomic and atmospheric models rules out NLTE atomic models with a low efficiency of hydrogen collisions. At variance with Paper I, it is now in better agreement with laboratory FeII f-values for all types of line-blanketed models. Our final model assumptions consistent with a single unique solar Fe abundance eps(Fe,Sun) = 7.48 ... 7.51 calculated from NLTE line formation are (a) a line-blanketed solar model atmosphere, (b) an iron model atom with hydrogen collision rates 0.5 < S_H < 5 times the standard value to compensate for the large photoionization cross-sections, (c) a microturbulence velocity xi = 1.0 kms, (d) van-der-Waals damping parameters decreased by Delta(log C6) = -0.10...-0.15 as compared to Anstee & O'Mara's calculations, depending on S_H, (e) FeII f-values as published by Schnabel et al., and (f) FeI f-values published by the Hannover and Oxford groups.

T. Gehren; A. J. Korn; J. Shi

2001-10-29T23:59:59.000Z

143

Fluctuations in the Gravitational, Strong and Weak Nuclear Fields through an Effective Harmonic Oscillator Model  

E-Print Network (OSTI)

We propose an effective harmonic oscillator model in order to treat the fluctuations of the gravitational, strong and weak nuclear fields. With respect to the gravitational field, first we use the model to estimate its fluctuating strength, necessary to decohere the wavefunction of a cubic centimeter of air at the standard temperature and pressure conditions. Second, the fluctuation of a point mass through a distance equal to the Planck length leads to the self-gravitational interaction of a particle, which can be related to its de Broglie frequency. Third, by making the equality of the fluctuating field strength with the gravitational field of a mass M at half of its Schwarzschild radius, we obtain an estimate of the mass of the Universe. We also consider the fluctuations of the strong nuclear field, as a means to estimate the separation in energy between the ground state and the centroid of the excitated states of the nucleon. Finally, taking into account the neutron-proton mass difference, we use the fluctuations of the weak nuclear field in order to evaluate the weak coupling constant.

P. R. Silva

2001-12-10T23:59:59.000Z

144

Technical advantages for weak value amplification: When less is more  

E-Print Network (OSTI)

The technical merits of weak value amplification techniques are analyzed. We consider models of several different types of technical noise in an optical context and show that weak value amplification techniques (which only use a small fraction of the photons) compare favorably with standard techniques (which uses all of them). Using the Fisher information metric, we demonstrate that weak value techniques can put all of the Fisher information about the detected parameter into a small portion of the events and show how this fact alone gives technical advantages. We go on to consider a time correlated noise model, and find that a Fisher information analysis indicates that while the standard method can have much larger information about the detected parameter than the postselected technique. However, the estimator needed to gather the information is technically difficult to implement, showing that the inefficient (but practical) signal-to-noise estimation of the parameter is usually superior. We also describe other technical advantages unique to imaginary weak value amplification techniques, focusing on beam deflection measurements. In this case, we discuss combined noise types (such as detector transverse jitter, angular beam jitter before the interferometer and turbulence) for which the interferometric weak value technique gives higher Fisher information over conventional methods. We go on to calculate the Fisher information of the recently proposed photon recycling scheme for beam deflection measurements, and show it further boosts the Fisher information by the inverse postselection probability relative to the standard measurement case.

Andrew N. Jordan; Julián Martínez-Rincón; John C. Howell

2013-09-19T23:59:59.000Z

145

Malaria Researchers Find Weakness in Global Killer | Department of Energy  

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

Malaria Researchers Find Weakness in Global Killer Malaria Researchers Find Weakness in Global Killer Malaria Researchers Find Weakness in Global Killer February 1, 2012 - 9:16am Addthis The protozoan Plasmodium falciparum gliding through a cell in the gut of a mosquito, its primary host. Although five different species of Plasmodium can cause malaria, Plasmodium falciparum causes the most severe disease. | Photo courtesy of Wikipedia Commons. The protozoan Plasmodium falciparum gliding through a cell in the gut of a mosquito, its primary host. Although five different species of Plasmodium can cause malaria, Plasmodium falciparum causes the most severe disease. | Photo courtesy of Wikipedia Commons. Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science

146

Role of Weak Ties in Link Prediction of Complex Networks  

E-Print Network (OSTI)

Plenty of algorithms for link prediction have been proposed and were applied to various real networks. Among these works, the weights of links are rarely taken into account. In this paper, we use local similarity indices to estimate the likelihood of the existence of links in weighted networks, including Common Neighbor, Adamic-Adar Index, Resource Allocation Index, and their weighted versions. In both the unweighted and weighted cases, the resource allocation index performs the best. To our surprise, the weighted indices perform worse, which reminds us of the well-known Weak Tie Theory. Further extensive experimental study shows that the weak ties play a significant role in the link prediction problem, and to emphasize the contribution of weak ties can remarkably enhance the predicting accuracy.

Lu, Linyuan

2009-01-01T23:59:59.000Z

147

Mechanical and acoustic properties of weakly cemented granular rocks  

SciTech Connect

This paper presents the results of laboratory measurements on the mechanical and acoustic properties of weakly cemented granular rock. Artificial rock samples were fabricated by cementing sand and glass beads with sodium silicate binder. During uniaxial compression tests, the rock samples showed stress-strain behavior which was more similar to that of soils than competent rocks, exhibiting large permanent deformations with frictional slip. The mechanical behavior of the samples approached that of competent rocks as the amount of binder was increased. For very weak samples, acoustic waves propagating in these rocks showed very low velocities of less than 1000 m/sec for compressional waves. A borehole made within this weakly cemented rock exhibited a unique mode of failure that is called ''anti-KI mode fracture'' in this paper. The effect of cementation, grain type, and boundary conditions on this mode of failure was also examined experimentally.

Nakagawa, S.; Myer, L.R.

2001-05-09T23:59:59.000Z

148

QCD Corrections to Jet Correlations in Weak Boson Fusion  

E-Print Network (OSTI)

Higgs boson production via weak boson fusion is sensitive to the tensor structure of the HVV (V=W,Z) couplings, which distinguishes loop induced vertices from SM expectations. At the CERN Large Hadron Collider this information shows up most clearly in the azimuthal angle correlations of the two forward and backward quark jets which are typical for weak boson fusion. We calculate the next-to-leading order QCD corrections to this process, in the presence of anomalous HVV couplings. Gluon emission does not significantly change the azimuthal jet correlations.

Terrance Figy; Dieter Zeppenfeld

2004-03-30T23:59:59.000Z

149

Algebraic Definition of weak ($\\infty$; n)-Categories.  

E-Print Network (OSTI)

In this paper we define a sequence of monads $\\mathbb{T}^(\\infty;n)$ $(n\\in\\mathbb{N})$ on $\\infty$-$\\mathbb{G}\\text{r}$, the category of the $\\infty$-graphs. We conjecture that algebras for $\\mathbb{T}^(0;n)$ which are defined in a purely algebraic setting, are models of weak $\\infty$-groupoids. And for all $n>1$ we conjecture that algebras for $\\mathbb{T}^(\\infty;n)$ which are defined in a purely algebraic setting, are models of weak $(\\infty; n)$-categories.

Camell Kachour

150

A Chemical Potential 'Battery' for Superfluid 4He Weak Links  

Science Conference Proceedings (OSTI)

Research and development of superfluid weak links has been hindered by the absence of a source of dc chemical potential, similar to a simple battery or voltage source for analogous superconducting devices. We describe here a method for generating a dc chemical potential difference, {delta}{mu} across a weak link array in superfluid 4He. The presence of a {delta}{mu} forces quantum oscillations at a Josephson frequency, selectable by the adjustment of input power to a heater. We discuss a case in which the frequency locks onto a resonance feature where it exhibits remarkable stability, and amplitude magnification by a factor of 40.

Hoskinson, E.; Sato, Y.; Packard, R. E. [Department of Physics, University of California, Berkeley, CA 94720 (United States); Penanen, K. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States)

2006-09-07T23:59:59.000Z

151

(Theory of elementary particles studies in weak interaction and grand unification and studies in accelerator design)  

Science Conference Proceedings (OSTI)

This report discusses research on: Stanford linear collider detector; Mark II; GEM; tau-charm factory; and SECC preradiator prototype and beam test. (LSP)

Not Available

1991-01-01T23:59:59.000Z

152

WEAKLY INTERACTING MASSIVE PARTICLE DARK MATTER AND FIRST STARS: SUPPRESSION OF FRAGMENTATION IN PRIMORDIAL STAR FORMATION  

SciTech Connect

We present the first three-dimensional simulations to include the effects of dark matter annihilation feedback during the collapse of primordial minihalos. We begin our simulations from cosmological initial conditions and account for dark matter annihilation in our treatment of the chemical and thermal evolution of the gas. The dark matter is modeled using an analytical density profile that responds to changes in the peak gas density. We find that the gas can collapse to high densities despite the additional energy input from the dark matter. No objects supported purely by dark matter annihilation heating are formed in our simulations. However, we find that dark matter annihilation heating has a large effect on the evolution of the gas following the formation of the first protostar. Previous simulations without dark matter annihilation found that protostellar disks around Population III stars rapidly fragmented, forming multiple protostars that underwent mergers or ejections. When dark matter annihilation is included, however, these disks become stable to radii of 1000 AU or more. In the cases where fragmentation does occur, it is a wide binary that is formed.

Smith, Rowan J.; Glover, Simon C. O.; Klessen, Ralf S. [Institut fuer Theoretische Astrophysik, Zentrum fuer Astronomie, Universitaet Heidelberg, Albert-Ueberle-Str. 2, D-69120 Heidelberg (Germany); Iocco, Fabio [Department of Physics, Oskar Klein Centre, AlbaNova, Stockholm University, SE-106 91 Stockholm (Sweden); Schleicher, Dominik R. G. [Institut fuer Astrophysik, Georg-August-Universitaet, Friedrich-Hund-Platz 1, D-37077 Goettingen (Germany); Hirano, Shingo; Yoshida, Naoki, E-mail: rowan@uni-heidelberg.de [Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8568 (Japan)

2012-12-20T23:59:59.000Z

153

Higgs Production by Gluon initiated Weak Boson Fusion  

E-Print Network (OSTI)

The gluon-gluon induced terms for Higgs production through weak-boson fusion are calculated. They form a finite and gauge-invariant subset of the NNLO corrections in the strong coupling constant. This is also the lowest order with sizeable t-channel colour exchange contributions, leading to additional hadronic activity between the outgoing jets.

M. M. Weber

2007-09-17T23:59:59.000Z

154

On the steady states of weakly reversible chemical reaction networks  

E-Print Network (OSTI)

A natural condition on the structure of the underlying chemical reaction network, namely weak reversibility, is shown to guarantee the existence of an equilibrium (steady state) in each positive stoichiometric compatibility class for the associated mass-action system. Furthermore, an index formula is given for the set of equilibria in a given stoichiometric compatibility class.

Deng, Jian; Feinberg, Martin; Nachman, Adrian

2011-01-01T23:59:59.000Z

155

A Weakly Nonlinear Primitive Equation Baroclinic Life Cycle  

Science Conference Proceedings (OSTI)

A weakly nonlinear baroclinic life cycle is examined with a spherical, multilevel, primitive equation model. The structure of the initial zonal jet is chosen so that the disturbance grows very slowly, that is, linear growth rate less than 0.1 day?...

Steven B. Feldstein

1994-01-01T23:59:59.000Z

156

Effective cavity pumping from weakly coupled quantum dots  

E-Print Network (OSTI)

We derive the effective cavity pumping and decay rates for the master equation of a quantum dot-microcavity system in presence of $N$ weakly coupled dots. We show that the in-flow of photons is not linked to the out-flow by thermal equilibrium relationships.

del Valle, E

2010-01-01T23:59:59.000Z

157

TEC Working Group Topic Groups Archives  

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

The following Topic Groups are no longer active; however, related documents and notes for these archived Topic Groups are available through the following links:

158

NIST Optical Radiation Group  

Science Conference Proceedings (OSTI)

Optical Radiation Group. Welcome. The Optical Radiation Group maintains, improves, and disseminates the national scales ...

2013-07-29T23:59:59.000Z

159

Security Technologies Group  

Science Conference Proceedings (OSTI)

Security Technologies Group. Welcome. Our group develops measurement science in support of performance-based standards ...

2012-10-24T23:59:59.000Z

160

Chaotic and Arnold stripes in weakly chaotic Hamiltonian systems  

E-Print Network (OSTI)

The dynamics in weakly chaotic Hamiltonian systems strongly depends on initial conditions and little can be affirmed about generic behaviors. Using two distinct Hamiltonian systems, namely one particle in an open rectangular billiard and four particles globally coupled on a discrete lattice, we show that in these models the transition from integrable motion to weak chaos emerges via chaotic stripes as the nonlinear parameter is increased. The stripes represent intervals of initial conditions which generate chaotic trajectories and increase with the nonlinear parameter of the system. In the billiard case the initial conditions are the injection angles. For higher-dimensional systems and small nonlinearities the chaotic stripes are the initial condition inside which Arnold diffusion occurs.

Marcelo S. Custódio; Cesar Manchein; Marcus W. Beims

2011-11-30T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Compatibility of weak rigidity with some types of elastic schemes  

SciTech Connect

The behavior of the hypoelastic-Synge, hypoelastic-Maugin, and hypoelastic-Carter and Quintana almost-thermodynamic material schemes, under weak rigidity hypotheses, is studied. In every case, the absence of principal transverse shock waves (or the vanishing of the corresponding speeds) is obtained. The same result follows for the longitudinal shock waves when the Lame coefficient ..mu.. does not vanish. A definition of an elastic almost-thermodynamic material scheme based on the Fermi--Walker transport is proposed and compared with the above elastic schemes. The speeds of the principal shock waves associated are attained and its compatibility with the Ferrando--Olivert incompressibility condition is proved. In the presence of weak rigidity the elastic schemes here defined lead (assuming ..mu..not =0) to the Born-rigidity condition.

del Olmo, V.; Olivert, J.

1986-04-01T23:59:59.000Z

162

Weak localization of light in superdiffusive random systems  

E-Print Network (OSTI)

L\\'evy flights constitute a broad class of random walks that occur in many fields of research, from animal foraging in biology, to economy to geophysics. The recent advent of L\\'evy glasses allows to study L\\'evy flights in controlled way using light waves. This raises several questions about the influence of superdiffusion on optical interference effects like weak and strong localization. Super diffusive structures have the extraordinary property that all points are connected via direct jumps, meaning that finite-size effects become an essential part of the physical problem. Here we report on the experimental observation of weak localization in L\\'evy glasses and compare results with recently developed optical transport theory in the superdiffusive regime. Experimental results are in good agreement with theory and allow to unveil how light propagates inside a finite-size superdiffusive system.

Burresi, Matteo; Savo, Romolo; Bertolotti, Jacopo; Vynck, Kevin; Wiersma, Diederik S

2011-01-01T23:59:59.000Z

163

Bounds on Heavy-to-Heavy Weak Decay Form Factors  

E-Print Network (OSTI)

We provide upper and lower bounds on the semileptonic weak decay form factors for $B \\to D^(*)$ and $\\Lambda_b \\to \\Lambda_c$ decays by utilizing inclusive heavy quark effective theory sum rules. These bounds are calculated to second order in $\\Lambda_{QCD}/m_Q$ and first order in $\\alpha_s$. The $O(\\alpha_s^2 \\beta_0)$ corrections to the bounds at zero recoil are also presented.

Chiang, C W

2001-01-01T23:59:59.000Z

164

Bounds on Heavy-to-Heavy Weak Decay Form Factors  

E-Print Network (OSTI)

We provide upper and lower bounds on the semileptonic weak decay form factors for $B \\to D^(*)$ and $\\Lambda_b \\to \\Lambda_c$ decays by utilizing inclusive heavy quark effective theory sum rules. These bounds are calculated to second order in $\\Lambda_{QCD}/m_Q$ and first order in $\\alpha_s$. The $O(\\alpha_s^2 \\beta_0)$ corrections to the bounds at zero recoil are also presented.

Cheng-Wei Chiang

2000-09-18T23:59:59.000Z

165

Charge and Spin Transport in Superconducting Weak Links  

E-Print Network (OSTI)

Abstract. The coherent mixing of the current states in the superconducting weak link subject to a Josephson phase difference ? and subject to an external transport current in the banks is one of the aims of this work. At ? = ? the nonlocal mixing of current states produces two vortices close to the point-contact between superconducting bulks. The effect of point-contact reflection in an impenetrable interface and effect of temperature on the vortices have been studied. It is obtained that increasing the reflection of the point-contact destroys the vortices while increasing the temperature restore these vortices. The vortex state is a new version of the interference between the macroscopic states and quantum tunnelling. Also, the weak link between unitary triplet superconductors which have f?wave and p + h?wave pairing symmetry has been studied from the spin and charge current-phase relation point of view. The main result in the second part of this thesis, is the polarization of the spin transport when a junction between triplet superconductors is used. It is observed that the spin current is the result of the misorientation between the gap vectors of two supercondcutors. In addition, the weak link between two bipolar nonunitary triplet superconductors is studied mathematically. The current-phase relations obtained in third part of this thesis are totally different from the junctions between the unitary spin-triplet superconductors and between the spin-singlet superconductors. The current phase diagrams which have been obtained in this work can be used to distinguish the symmetry of the order parameter in the crystals. PACS numbers: 74.50.+r, 74.20.Rp, 72.25.-b, 74.70.Pq, 74.70.TxCharge and Spin Transport in Superconducting Weak Links 2 1.

Gholamreza Rashedi

2005-01-01T23:59:59.000Z

166

Fundamental Symmetries and Interactions  

E-Print Network (OSTI)

In nuclear physics numerous possibilities exist to investigate fundamental symmetries and interactions. In particular, the precise measurements of properties of fundamental fermions, searches for new interactions in ?-decays, and violations of discrete symmeties offer possibilities to search for physics beyond standard theory. Precise measurements of fundamental constants can be carried out. Low energy experiments allow to probe New Physics at mass scales far beyond the reach of present accelerators or such planned for the future and at which predicted new particles could be produced directly. 1. Fundamental Forces and Symmetries Symmetries play an important and crucial role in physics. Global symmetries give rise to conservation laws and local symmetries yield forces [ 1]. To date we know four fundamental interactions: (i) Electromagnetism, (ii) Weak Interactions, (iii) Strong Interactions, and (iv) Gravitation. These four forces are fundamental in the sense that all observed dynamical processes in physics can be traced back to one or a combination of them. Together with fundamental symmetries they from a framework on which all physical descriptions ultimately rest.

Klaus P. Jungmann A; Kernfysisch Versneller Instituut

2005-01-01T23:59:59.000Z

167

First Determination of the Weak Charge of the Proton  

E-Print Network (OSTI)

The Qweak experiment has measured the parity-violating asymmetry in polarized e-p elastic scattering at Q^2 = 0.025(GeV/c)^2, employing 145 microamps of 89% longitudinally polarized electrons on a 34.4cm long liquid hydrogen target at Jefferson Lab. The results of the experiment's commissioning run are reported here, constituting approximately 4% of the data collected in the experiment. From these initial results the measured asymmetry is Aep = -279 +- 35 (statistics) +- 31 (systematics) ppb, which is the smallest and most precise asymmetry ever measured in polarized e-p scattering. The small Q^2 of this experiment has made possible the first determination of the weak charge of the proton, QpW, by incorporating earlier parity-violating electron scattering (PVES) data at higher Q^2 to constrain hadronic corrections. The value of QpW obtained in this way is QpW(PVES) = 0.064 +- 0.012, in good agreement with the Standard Model prediction of QpW(SM) = 0.0710 +- 0.0007. When this result is further combined with the Cs atomic parity violation (APV) measurement, significant constraints on the weak charges of the up and down quarks can also be extracted. That PVES+APV analysis reveals the neutron's weak charge to be QnW(PVES+APV) = -0.975 +- 0.010.

Qweak Collaboration; D. Androic; D. S. Armstrong; A. Asaturyan; T. Averett; J. Balewski; J. Beaufait; R. S. Beminiwattha; J. Benesch; F. Benmokhtar; J. Birchall; R. D. Carlini; G. D. Cates; J. C. Cornejo; S. Covrig; M. M. Dalton; C. A. Davis; W. Deconinck; J. Diefenbach; J. F. Dowd; J. A. Dunne; D. Dutta; W. S. Duvall; M. Elaasar; W. R. Falk; J. M. Finn; T. Forest; D. Gaskell; M. T. W. Gericke; J. Grames; V. M. Gray; K. Grimm; F. Guo; J. R. Hoskins; K. Johnston; D. Jones; M. Jones; R. Jones; M. Kargiantoulakis; P. M. King; E. Korkmaz; S. Kowalski; J. Leacock; J. Leckey; A. R. Lee; J. H. Lee; L. Lee; S. MacEwan; D. Mack; J. A. Magee; R. Mahurin; J. Mammei; J. W. Martin; M. J. McHugh; D. Meekins; J. Mei; R. Michaels; A. Micherdzinska; A. Mkrtchyan; H. Mkrtchyan; N. Morgan; K. E. Myers; A. Narayan; L. Z. Ndukum; V. Nelyubin; Nuruzzaman; W. T. H van Oers; A. K. Opper; S. A. Page; J. Pan; K. D. Paschke; S. K. Phillips; M. L. Pitt; M. Poelker; J. F. Rajotte; W. D. Ramsay; J. Roche; B. Sawatzky; T. Seva; M. H. Shabestari; R. Silwal; N. Simicevic; G. R. Smith; P. Solvignon; D. T. Spayde; A. Subedi; R. Subedi; R. Suleiman; V. Tadevosyan; W. A. Tobias; V. Tvaskis; B. Waidyawansa; P. Wang; S. P. Wells; S. A. Wood; S. Yang; R. D. Young; S. Zhamkochyan

2013-07-19T23:59:59.000Z

168

$?$ meson exchange effect on nonmesonic hypernuclear weak decay observables  

E-Print Network (OSTI)

We analyze the influence of $\\sigma$ meson exchange on the main nonmesonic hypernuclear weak decay observables: the total rate, $\\Gamma_{NM}$, the neutron-to-proton branching ratio, $\\Gamma_{n/p}$, and the proton asymmetry parameter, $a_\\Lambda$. The $\\sigma$ meson exchange is added to the standard strangeness-changing weak $\\Lambda N\\to NN$ transition potential, which includes the exchange of the complete pseudoscalar and vector mesons octet ($\\pi$, $\\eta$, $K$, $\\rho$, $\\omega$, $K^*$). Using a shell model formalism, the $\\sigma$ meson weak coupling constants are adjusted to reproduce the recent $\\Gamma_{NM}$ and $\\Gamma_{n/p}$ experimental data for $^5_{\\Lambda}He$. Numerical results for the remaining observables of $^5_{\\Lambda}He$ and all the observables of $^{12}_{\\Lambda}C$ decays are presented. They clearly show that the addition of the $\\sigma$ meson, in spite of improving some observables values, is not enough to reproduce simultaneously all the measurements, and the puzzle posed by the experimental data remains unexplained.

C. Barbero; A. Mariano

2005-09-15T23:59:59.000Z

169

First Determination of the Weak Charge of the Proton  

SciTech Connect

The Qweak experiment has measured the parity-violating asymmetry in polarized e-p elastic scattering at Q^2 = 0.025(GeV/c)^2, employing 145 microamps of 89% longitudinally polarized electrons on a 34.4cm long liquid hydrogen target at Jefferson Lab. The results of the experiment's commissioning run are reported here, constituting approximately 4% of the data collected in the experiment. From these initial results the measured asymmetry is A_e_p = -279 +- 35 (statistics) +- 31 (systematics) ppb, which is the smallest and most precise asymmetry ever measured in polarized e-p scattering. The small Q^2 of this experiment has made possible the first determination of the weak charge of the proton, Q^p_W, by incorporating earlier parity-violating electron scattering (PVES) data at higher Q^2 to constrain hadronic corrections. The value of Q^p_W obtained in this way is Q^p_W(PVES) = 0.064 +- 0.012, in good agreement with the Standard Model prediction of Q^p_W(SM) = 0.0710 +- 0.0007. When this result is further combined with the Cs atomic parity violation (APV) measurement, significant constraints on the weak charges of the up and down quarks can also be extracted. That PVES+APV analysis reveals the neutron's weak charge to be Q^n_W(PVES+APV) = -0.975 +- 0.010.

Androic, D; Armstrong, D S; Asaturyan, A; Averett, T; Balewski, J; Beaufait, J; Beminiwattha, R S; Benesch, J; Benmokhtar, F; Birchall, J; Carlini, R D [JLAB; Cates, G D; Cornejo, J C; Covrig, S; Dalton, M M; Davis, C A; Deconinck, W; Diefenbach, J; Dowd, J F; Dunne, J A; Dutta, D; Duvall, W S; Elaasar, M; Falk, W R; Finn, J M; Forest, T; Gaskell, D; Gericke, M T. W.; Grames, J; Gray, V M; Grimm, K; Guo, F; Hoskins, J R; Johnston, K; Jones, D; Jones, M; Jones, R; Kargiantoulakis, M; King, P M; Korkmaz, E; Kowalski, S; Leacock, J; Leckey, J; Lee, A R; Lee, J H; Lee, L; MacEwan, S; Mack, D; Magee, J A; Mahurin, R; Mammei, J; Martin, J W; McHugh, M J; Meekins, D; Mei, J; Michaels, R; Micherdzinska, A; Mkrtchyan, A; Mkrtchyan, H; Morgan, N; Myers, K E; Narayan, A; Ndukum, L Z; Nelyubin, V; van Oers, W T H; Nuruzzaman,; Opper, A K; Page, S A; Pan, J; Paschke, K D; Phillips, S K; Pitt, M L; Poelker, M; Rajotte, J F; Ramsay, W D; Roche, J; Sawatzky, B; Seva, T; Shabestari, M H; Silwal, R; Simicevic, N; Smith, G R; Solvignon, P; Spayde, D T; Subedi, A; Subedi, R; Suleiman, R; Tadevosyan, V; Tobias, W A; Tvaskis, V; Waidyawansa, B; Wang, P; Wells, S P; Wood, S A; Yang, S; Young, R D; Zhamkochyan, S

2013-10-01T23:59:59.000Z

170

TYPE III RADIO BURSTS PERTURBED BY WEAK CORONAL SHOCKS  

Science Conference Proceedings (OSTI)

Some type III bursts are observed to undergo sudden flux modifications, e.g., reductions and intensifications, when type III beams cross shocks in the upper corona or solar wind. First simulations are presented for type III bursts perturbed by weak coronal shocks, which type III beams traverse. The simulations incorporate spatially localized jumps in plasma density and electron and ion temperatures downstream of a shock. A shock is predicted to produce significant modulations to a type III burst: (1) a broadband flux reduction or frequency gap caused by the shock's density jump, (2) a narrowband flux intensification originating from where the downstream plasma density locally has a small gradient, (3) a possible intensification from the shock front or just upstream, and (4) changes in the frequency drift rate profile and the temporal evolution of radiation flux at frequencies corresponding to the shocked plasma. The modulations are caused primarily by fundamental modifications to the radiation processes in response to the shocked density and temperatures. The predicted intensifications and reductions appear qualitatively consistent with the available small number of reported observations, although it is unclear how representative these observations are. It is demonstrated that a weak shock can cause an otherwise radio-quiet type III beam to produce observable levels of narrowband radio emission. The simulations suggest that type III bursts with frequency-time fine structures may provide a tool to probe shocks in the corona and solar wind, especially for weak shocks that do not radiate by themselves.

Li, B.; Cairns, Iver H. [School of Physics, University of Sydney, New South Wales 2006 (Australia)

2012-07-10T23:59:59.000Z

171

Spectral multiplicity for powers of weakly mixing automorphisms  

SciTech Connect

We study the behaviour of the maximal spectral multiplicity m(R{sup n}) for the powers of a weakly mixing automorphism R. For some particular infinite sets A we show that there exists a weakly mixing rank-one automorphism R such that m(R{sup n})=n and m(R{sup n+1})=1 for all positive integers n element of A. Moreover, the cardinality cardm(R{sup n}) of the set of spectral multiplicities for the power R{sup n} is shown to satisfy the conditions cardm(R{sup n+1})=1 and cardm(R{sup n})=2{sup m(n)}, m(n){yields}{infinity}, n element of A. We also construct another weakly mixing automorphism R with the following properties: all powers R{sup n} have homogeneous spectra and the set of limit points of the sequence {l_brace}m(R{sup n})/n:n element of N{r_brace} is infinite. Bibliography: 17 titles.

Ryzhikov, Valerii V [M. V. Lomonosov Moscow State University, Faculty of Mechanics and Mathematics, Moscow (Russian Federation)

2012-07-31T23:59:59.000Z

172

Argonne Physics Division - Theory Group  

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

Special Day & Time: Special Day & Time: 10:30am Tues. 19 March 2013 Alessandro Lovato Argonne Leadership Computing Facility and Physics Division lovato@anl.gov Weak Response of Cold Symmetric Nuclear Matter at Three-Body Cluster Level 24 January 2013 Elmar Biernat Universidade Técnica de Lisboa, Portugal elmar.biernat@ist.utl.pt Meson properties from two different covariant approaches Special Day: Tues. 22 January 2013 Guillaume Hupin Lawrence Livermore National Lab hupin1@llnl.gov Continuum effects in nuclear structure and reactions Special Day & Time: 10:30am, Tues. 15 January 2013 Kyle Wendt Ohio State University wendt.31@osu.edu Non-Locality in the Similarity Renormalization Group Special Time: 10:30am 10 January 2013 Vojtech Krejcirik University of Maryland vkrejcir@umd.edu

173

Structural Interactions in Spatial Panels  

E-Print Network (OSTI)

; Pesaran et al., 2004, Holly et al., 2008), socio-cultural distance (Conley and Topa, 2002; Bhattacharjee and Jensen-Butler, 2005), and transportation costs and time (Gibbons and Machin, 2005; Bhattacharjee and Jensen-Butler, 2005) have been highlighted... at higher lags in the dynamic panel data model), who are correlated with the above set of endogenous variables, but not with the idiosyncratic errors ?1?? ?2?? ? ? ? ? ??? from the interaction error equation (2). In social networks agents who have weak ties...

Bhattacharjee, Arnab; Holly, Sean

174

<interaction num ...  

Science Conference Proceedings (OSTI)

... interaction> gun powder wiki ... num="4"> Guinness sales per day ... num="5"> Guinness sale of pints ...

2012-02-28T23:59:59.000Z

175

Weak dispersive forces between glass-gold macroscopic surfaces in alcohols  

E-Print Network (OSTI)

In this work we concentrate on an experimental validation of the Lifshitz theory for van der Waals and Casimir forces in gold-alcohol-glass systems. From this theory weak dispersive forces are predicted when the dielectric properties of the intervening medium become comparable to one of the interacting surfaces. Using inverse colloid probe atomic force microscopy dispersive forces were measured occasionally and under controlled conditions by addition of salt to screen the electrostatic double layer force if present. The dispersive force was found to be attractive, and an order of magnitude weaker than that in air. Although the theoretical description of the forces becomes less precise for these systems even with full knowledge of the dielectric properties, we find still our results in reasonable agreement with Lifshitz theory.

P. J. van Zwol; G. Palasantzas; J. Th. M. DeHosson

2009-04-03T23:59:59.000Z

176

Weak and Strong Coupling Theories for Polarizable Colloids and Nano-Particles  

E-Print Network (OSTI)

A theory is presented which allows us to accurately calculate the density profile of monovalent and multivalent counterions in suspensions of polarizable colloids or nano-particles. In the case of monovalent ions, we derive a weak-coupling theory that explicitly accounts for the ion-image interaction, leading to a modified Poisson-Boltzmann equation. For suspensions with multivalent counterions, a strong-coupling theory is used to calculate the density profile near the colloidal surface and a Poisson-Boltzmann equation with a renormalized boundary condition to account for the counterion distribution in the far-field. All the results are compared with the Monte Carlo simulations, showing an excellent agreement between the theory and the simulations.

Amin Bakhshandeh; Alexandre Pereira dos Santos; Yan Levin

2011-09-21T23:59:59.000Z

177

Fermionic-Bosonic Couplings in a Weakly Deformed Odd-Mass Nucleus ^{93}_{41}Nb  

SciTech Connect

A comprehensive level scheme of {sup 93}Nb below 2 MeV has been constructed from information obtained with the {sup 93}Nb(n,n{prime}{gamma}) and the {sup 94}Zr(p,2n{gamma}{gamma}){sup 93}Nb reactions. Branching ratios, lifetimes, transition multipolarities, and spin assignments have been determined. From M1 and E2 strengths, fermionic-bosonic excitations of isoscalar and isovector characters have been identified from the weak couplings of the {pi}1g{sub 9/2} {circle_times} {sub 40}{sup 92}Zr and {pi}2p{sub 1/2}{sup -1} {circle_times} {sub 42}{sup 94}Mo configurations. A microscopic interpretation of such excitations is obtained from shell-model calculations, which use low-momentum effective interactions.

Orce, J. N. [University of Kentucky, Lexington; Holt, J. D. [Oak Ridge National Laboratory (ORNL); Linnemann, A. [Universitat zu Koln, Koln, Germany; McKay, C. J. [University of Kentucky, Lexington; Fransen, C. [Universitat zu Koln, Koln, Germany; Jolie, J. [Universitat zu Koln, Koln, Germany; Kuo, T.T.S. [State University of New York, Stony Brook; Lesher, S. R. [University of Kentucky, Lexington; McEllistrem, M. T. [University of Kentucky, Lexington; Pietralla, N. [Universitat zu Koln, Koln, Germany; Warr, N. [Universitat zu Koln, Koln, Germany; Werner, V. [Universitat zu Koln, Koln, Germany; Yates, S. W. [University of Kentucky, Lexington

2010-01-01T23:59:59.000Z

178

TEC Working Group Topic Groups Archives Consolidated Grant Topic Group |  

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

Consolidated Grant Topic Consolidated Grant Topic Group TEC Working Group Topic Groups Archives Consolidated Grant Topic Group The Consolidated Grant Topic Group arose from recommendations provided by the TEC and other external parties to the DOE Senior Executive Transportation Forum in July 1998. It was proposed that the consolidation of multiple funding streams from numerous DOE sources into a single grant would provide a more equitable and efficient means of assistance to States and Tribes affected by DOE nuclear material shipments. The group serves as an important vehicle for DOE senior managers to assess and incorporate stakeholder input into the development of a consolidated funding vehicle for transportation activities, should DOE implement such a program. Some of the major issues under consideration by the Consolidated Grant

179

Interactive Jobs  

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

Interactive Jobs Interactive Jobs Interactive Jobs Interactive Batch Jobs The login nodes on Genepool should not be used for heavy interactive work. These login nodes are shared amoungst all Genepool users so heavy CPU or memory usage will affect other Genepool users. 10 nodes have been reserved on Genepool for high priority and interactive work. Each user can use up to 2 slots at a time in the high priority queue. Use the qlogin command to run jobs interactively. The example below shows how to request an interactive session on Genepool . genepool:$~> qlogin -l high.c This will put you directly onto a node where you can do interactive work. kmfagnan@genepool01:~$ qlogin -l high.c Your job 1459021 ("QLOGIN") has been submitted waiting for interactive job to be scheduled ......

180

TEC Working Group Topic Groups Tribal  

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

The Tribal Topic Group was established in January 1998 to address government-to-government consultation between DOE and Indian Tribes affected by its transportation activities. The group focuses on...

Note: This page contains sample records for the topic "group weak interactions" 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

One pion production in neutrino-nucleon scattering and the different parametrizations of the weak $N\\rightarrow?$ vertex  

E-Print Network (OSTI)

The $N \\to \\Delta$ weak vertex provides an important contribution to the one pion production in neutrino-nucleon and neutrino-nucleus scattering for $\\pi N$ invariant masses below 1.4 GeV. Beyond its interest as a tool in neutrino detection and their background analyses, one pion production in neutrino-nucleon scattering is useful to test predictions based on the quark model and other internal symmetries of strong interactions. Here we try to establish a connection between two commonly used parametrizations of the weak $N \\to \\Delta$ vertex and form factors (FF) and we study their effects on the determination of the axial coupling $C_5^A(0)$, the common normalization of the axial FF, which is predicted to hold 1.2 by using the PCAC hypothesis. Predictions for the $\

C. Barbero; G. López Castro; A. Mariano

2013-11-14T23:59:59.000Z

182

Initial Public Offerings with Strong and Weak Premarket Interests †  

E-Print Network (OSTI)

We revisit IPO underpricing and long-run performance conditioned on premarket interest. Using 4,260 non-financial IPOs during 1990-2004, we find that even IPOs faced with weak premarket interest (and consequently priced lower) are underpriced on average by 4.3 percent, which is mostly unpredicted by previous studies. In the long run, we find that low-interest IPOs have much less underperformance than high-interest IPOs over the four years after IPO. Furthermore, after controlling for size, we find little evidence for longrun underperformance in low-interest IPOs.

Sangkyoo (s. Q. Kang; Joseph P. Ogden

2009-01-01T23:59:59.000Z

183

Limits from Weak Gravity Conjecture on Dark Energy Models  

E-Print Network (OSTI)

The weak gravity conjecture has been proposed as a criterion to distinguish the landscape from the swampland in string theory. As an application in cosmology of this conjecture, we use it to impose theoretical constraint on parameters of two types of dark energy models. Our analysis indicates that the Chaplygin-gas-type models realized in quintessence field are in the swampland, whereas the $a$ power-low decay model of the variable cosmological constant can be viable but the parameters are tightly constrained by the conjecture.

Xing Wu; Zong-Hong Zhu

2007-10-07T23:59:59.000Z

184

Effects of weakly coupled channels on quasielastic barrier distributions  

Science Conference Proceedings (OSTI)

Heavy-ion collisions often produce fusion barrier distributions with structures displaying a fingerprint of couplings to highly collective excitations. Similar distributions can be obtained from large-angle quasielastic scattering, although in this case, the role of the many weak direct-reaction channels is unclear. For {sup 20}Ne+{sup 90}Zr, we have observed the barrier structures expected for the highly deformed neon projectile; however, for {sup 20}Ne+{sup 92}Zr, we find significant extra absorption into a large number of noncollective inelastic channels. This leads to smearing of the barrier distribution and a consequent reduction in the ''resolving power'' of the quasielastic method.

Piasecki, E.; Kisielinski, M. [Heavy Ion Laboratory, Warsaw University, Warsaw (Poland); The Andrzej Soltan Institute for Nuclear Studies, Swierk (Poland); Swiderski, L.; Keeley, N.; Rusek, K.; Strojek, I. [The Andrzej Soltan Institute for Nuclear Studies, Swierk (Poland); Gawlikowicz, W.; JastrzePbski, J.; Kordyasz, A.; Trzcinska, A. [Heavy Ion Laboratory, Warsaw University, Warsaw (Poland); Kliczewski, S. [The Henryk Niewodniczanski Institute of Nuclear Physics, Krakow (Poland); Kowalczyk, M. [Heavy Ion Laboratory, Warsaw University, Warsaw (Poland); Institute of Experimental Physics, Warsaw University, Warsaw (Poland); Khlebnikov, S. [Khloplin Radium Institute, St. Petersburg (Russian Federation); Koshchiy, E. [Kharkiv University, Kharkiv (Ukraine); Kozulin, E.; Loktev, T.; Smirnov, S. [JINR, Dubna (Russian Federation); Krogulski, T. [Faculty of Physics, University of Bialystok, Bialystok (Poland); Mutterer, M. [Institut fuer Kernphysik, Technische Universitaet Darmstadt, Darmstadt (Germany); Piasecki, K. [Institute of Experimental Physics, Warsaw University, Warsaw (Poland)] (and others)

2009-11-15T23:59:59.000Z

185

Some new links between the weak KAM and Monge problems  

E-Print Network (OSTI)

The weak KAM theory predicts the survivals of invariant measures of Hamiltonian systems under large perturbations. It is the subject of an extensive research in the last few decades. The optimal mass transportation was introduced by Monge some 200 years ago and is, today, the source of large number of results in analysis, geometry and convexity. Recently, some interesting links where discovered between these two fields. Here we investigate a new, surprising link involving the metric Monge distance. In particular we get for any pair of probability measures $\\lambda^+,\\lambda^-$ a generalization of the identity

Wolansky, Gershon

2009-01-01T23:59:59.000Z

186

Engineered Fire Safety Group  

Science Conference Proceedings (OSTI)

Engineered Fire Safety Group. Welcome. ... Employment/Research Opportunities. Contact. Jason Averill, Leader. Engineered Fire Safety Group. ...

2012-06-05T23:59:59.000Z

187

Energy Research Group Homepage  

Science Conference Proceedings (OSTI)

Energy Research Group. Welcome. The newest Group in the CNST develops instruments designed to reveal the nanoscale ...

2012-10-02T23:59:59.000Z

188

Weak lensing and the Dyer-Roeder approximation  

E-Print Network (OSTI)

The distance-redshift relation plays an important role in cosmology. In the standard approach to cosmology it is assumed that this relation is the same as in the homogeneous universe. As the real universe is not homogeneous there are several methods to calculate the correction. The weak lensing approximation and the Dyer-Roeder relation are one of them. This paper establishes a link between these two approximations. It is shown that if the universe is homogeneous with only small, vanishing after averaging, density fluctuations along the line of sight, then the distance correction is negligible. It is also shown that a vanishing 3D average of density fluctuations does not imply that the mean of density fluctuations along the line of sight is zero. In this case, even within the linear approximation, the distance correction is not negligible. The modified version of the Dyer-Roeder relation is presented and it is shown that this modified relation is consistent with the correction obtained within the weak lensing approximation. The correction to the distance for a source at z ~ 2 is of order of a few percent. Thus, with an increasing precision of cosmological observations an accurate estimation of the distance is essential. Otherwise errors due to miscalculation the distance can become a major source of systematics.

Krzysztof Bolejko

2010-11-17T23:59:59.000Z

189

TEC Working Group Topic Groups Security  

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

The Security Topic group is comprised of regulators, law enforcement officials, labor and industry representatives and other subject matter experts concerned with secure transport of spent nuclear...

190

Weak lensing flexion as a probe of galaxy cluster substructure  

E-Print Network (OSTI)

Measuring galaxy cluster total masses and the amount of dark matter substructure within galaxy cluster haloes is a fundamental probe of the ACDM model of structure formation, as well as the interactions between baryonic ...

Cain, Benjamin Martin

2011-01-01T23:59:59.000Z

191

Ion Storage Group  

Science Conference Proceedings (OSTI)

... Precision spectroscopy experiments have applications to clocks and tests of fundamental interactions. Three main project areas are. ...

2013-08-08T23:59:59.000Z

192

Neutron-Diffraction Evidence for the Ferrimagnetic Ground State of a Molecule-Based Magnet with Weakly Coupled Sublattices  

SciTech Connect

The diruthenium compound [Ru2(O2CMe)4]3[Cr(CN)6] contains two weakly coupled, ferrimag- netically ordered sublattices occupying the same volume. The magnetic field Hc 800 Oe required to align the two sublattice moments is proportional to the antiferromagnetic dipolar interaction Kc B Hc 5 10 3 meV between sublattices. Powder neutron-diffraction measurements on a deuterated sample reveal that the sublattice moments are restricted by the anisotropy of the diruthenium paddle-wheel complexes to the cubic diagonals. Those measurements also suggest that the quantum corrections to the ground state are significant.

Fishman, Randy Scott [ORNL; Campo, Javier [University of Zaragoza, Spain; Vos, Thomas E. [University of Utah; Miller, Joel S. [University of Utah

2012-01-01T23:59:59.000Z

193

Near- and subbarrier elastic and quasielastic scattering of the weakly bound {sup 6}Li projectile on {sup 144}Sm  

Science Conference Proceedings (OSTI)

High-precision data of backward-angle elastic and quasielastic scattering for the weakly bound {sup 6}Li projectile on {sup 144}Sm target at deep-sub-barrier, near-, and above-barrier energies were measured. From the deep-sub-barrier data, the surface diffuseness of the nuclear interacting potential was studied. Barrier distributions were extracted from the first derivatives of the elastic and quasielastic excitation functions. It is shown that sequential breakup through the first resonant state of the {sup 6}Li is an important channel to be included in coupled-channels calculations, even at deep-sub-barrier energies.

Monteiro, D. S.; Otomar, D. R.; Lubian, J.; Gomes, P. R. S. [Instituto de Fisica, Universidade Federal Fluminense, Av. Litoranea s/n, Gragoata, Niteroi, R.J., 24210-340 (Brazil); Capurro, O. A.; Marti, G. V. [Laboratorio TANDAR, Comision Nacional de Energia Atomica, Av. General Paz 1499, 1650 San Martin, Buenos Aires (Argentina); Arazi, A.; Figueira, J. M.; Heimann, D. Martinez; Negri, A. E.; Pacheco, A. J. [Laboratorio TANDAR, Comision Nacional de Energia Atomica, Av. General Paz 1499, 1650 San Martin, Buenos Aires (Argentina); CONICET, Av. Rivadavia 1917, Buenos Aires (1033) (Argentina); Niello, J. O. Fernandez [Laboratorio TANDAR, Comision Nacional de Energia Atomica, Av. General Paz 1499, 1650 San Martin, Buenos Aires (Argentina); CONICET, Av. Rivadavia 1917, Buenos Aires (1033) (Argentina); Escuela de Ciencia y Tecnologia, Univ. Nac. de San Martin, San Martin (1650), Buenos Aires (Argentina); Guimaraes, V. [Instituto de Fisica, Universidade de Sao Paulo, Caixa postal 66318, 05315-970, Sao Paulo, S.P. (Brazil)

2009-01-15T23:59:59.000Z

194

Large Deviations in the Superstable Weakly Imperfect Bose Gas  

E-Print Network (OSTI)

The superstable Weakly Imperfect Bose Gas {(WIBG)} was originally derived to solve the inconsistency of the Bogoliubov theory of superfluidity. Its grand-canonical thermodynamics was recently solved but not at {point of} the {(first order)} phase transition. This paper proposes to close this gap by using the large deviations formalism and in particular the analysis of the Kac distribution function. It turns out that, as a function of the chemical potential, the discontinuity of the Bose condensate density at the phase transition {point} disappears as a function of the particle density. Indeed, the Bose condensate continuously starts at the first critical particle density and progressively grows but the free-energy per particle stays constant until the second critical density is reached. At higher particle densities, the Bose condensate density as well as the free-energy per particle both increase {monotonously}.

J. -B. Bru; V. A. Zagrebnov

2007-09-21T23:59:59.000Z

195

Are vortices in rotating superfluids breaking the Weak Equivalence Principle?  

E-Print Network (OSTI)

Due to the breaking of gauge symmetry in rotating superfluid Helium, the inertial mass of a vortex diverges with the vortex size. The vortex inertial mass is thus much higher than the classical inertial mass of the vortex core. An equal increase of the vortex gravitational mass is questioned. The possibility that the vortices in a rotating superfluid could break the weak equivalence principle in relation with a variable speed of light in the superfluid vacuum is debated. Experiments to test this possibility are investigated on the bases that superfluid Helium vortices would not fall, under the single influence of a uniform gravitational field, at the same rate as the rest of the superfluid Helium mass.

Clovis Jacinto de Matos

2009-09-15T23:59:59.000Z

196

Anomaly induced transport coefficients, from weak to strong coupling  

E-Print Network (OSTI)

The existence of new transport phenomena associated to the presence of quantum anomalies has atracted very recently the attention of theorist. These transport coefficient have very interesting properties, for example, they do not renormalize. The most famous case of anomaly induced transport phenomena is the Chiral Magnetic Effect, in which an electric current is produced by a magnetic field if the system has a different number of right handed fermions respect the left handed one. In this thesis we have studied those transport coefficients from Kubo formulas at weak and strong coupling. To finish a fluid/gravity approach is used to compute all the second order anomalous coefficients in an anomalous conformal fluid.

Francisco Pena-Benitez

2013-07-01T23:59:59.000Z

197

Nonlinear microwave response of aluminum weak-link Josephson oscillators  

E-Print Network (OSTI)

We present the driven response at T=30mK of 6 GHz superconducting resonators constructed from capacitively-shunted three dimensional (3D) aluminum nanobridge superconducting quantum interference devices (nanoSQUIDs). We observe flux modulation of the resonant frequency in quantitative agreement with numerical calculation and characteristic of near-ideal short weak link junctions. Under strong microwave excitation, we observe stable bifurcation in devices with coupled quality factor (Q) ranging from ~30-3500. Near this bias point, parametric amplification with > 20dB gain, 40 MHz bandwidth, and near quantum-limited noise performance is observed. Our results indicate that 3D nanobridge junctions are attractive circuit elements to realize quantum bits.

E. M. Levenson-Falk; R. Vijay; I. Siddiqi

2011-01-24T23:59:59.000Z

198

Nonlinear microwave response of aluminum weak-link Josephson oscillators  

E-Print Network (OSTI)

We present the driven response at T=30mK of 6 GHz superconducting resonators constructed from capacitively-shunted three dimensional (3D) aluminum nanobridge superconducting quantum interference devices (nanoSQUIDs). We observe flux modulation of the resonant frequency in quantitative agreement with numerical calculation and characteristic of near-ideal short weak link junctions. Under strong microwave excitation, we observe stable bifurcation in devices with coupled quality factor (Q) ranging from ~30-3500. Near this bias point, parametric amplification with > 20dB gain, 40 MHz bandwidth, and near quantum-limited noise performance is observed. Our results indicate that 3D nanobridge junctions are attractive circuit elements to realize quantum bits.

Levenson-Falk, E M; Siddiqi, I

2011-01-01T23:59:59.000Z

199

Lighting Group: What's New  

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

What's New What's New in the Lighting Group For more information on what's new in the Lighting Group, please contact: Francis Rubinstein Lighting Group Leader (510) 486-4096...

200

Weak Lensing Mass Reconstruction of the Galaxy Cluster Abell 209  

E-Print Network (OSTI)

Weak lensing applied to deep optical images of clusters of galaxies provides a powerful tool to reconstruct the distribution of the gravitating mass associated to these structures. We use the shear signal extracted by an analysis of deep exposures of a region centered around the galaxy cluster Abell 209, at redshift z=0.2, to derive both a map of the projected mass distribution and an estimate of the total mass within a characteristic radius. We use a series of deep archival R-band images from CFHT-12k, covering an area of 0.3 deg^2. We determine the shear of background galaxy images using a new implementation of the modified Kaiser-Squires-Broadhurst pipeline for shear determination, which we has been tested against the ``Shear TEsting Program 1 and 2'' simulations. We use mass aperture statistics to produce maps of the 2 dimensional density distribution, and parametric fits using both Navarro-Frenk-White (NFW) and singular-isothermal-sphere profiles to constrain the total mass. The projected mass distribution shows a pronounced asymmetry, with an elongated structure extending from the SE to the NW. This is in general agreement with the optical distribution previously found by other authors. A similar elongation was previously detected in the X-ray emission map, and in the distribution of galaxy colours. The circular NFW mass profile fit gives a total mass of M_{200} = 7.7^{+4.3}_{-2.7} 10^{14} solar masses inside the virial radius r_{200} = 1.8\\pm 0.3 Mpc. The weak lensing profile reinforces the evidence for an elongated structure of Abell 209, as previously suggested by studies of the galaxy distribution and velocities.

S. Paulin-Henriksson; V. Antonuccio-Delogu; C. P. Haines; M. Radovich; A. Mercurio; U. Becciani

2007-01-28T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Sustainable Energy Systems Group  

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

Sustainable Energy Systems Group The Sustainable Energy Systems Group studies the impacts of energy generation and use, manufacturing, and other activities on the environment, the...

202

Scientific Interest Groups  

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

synchrotron research in a particular area. View monthly meetings on calendar Groups Catalysis Randall Winans, APS The Catalysis group meets at noon on the second Tuesday of each...

203

Shell model formalism for all hypernuclei types: A guide to solving the nonmesonic weak decay puzzle  

Science Conference Proceedings (OSTI)

We extend to odd-odd core hypernuclei our independent particle shell model (IPSM) formalism developed previously for the evaluation of the {gamma}{sub NM},{gamma}{sub n/p}, and a{sub {lambda}} hypernuclear weak decay observables. The present procedure reproduces the even-odd and even-even core results as particular cases. Adopting the standard strangeness-changing weak {lambda}N{yields}NN transition potential with exchange of the complete pseudoscalar and vector meson octets ({pi},{eta},K,{rho},{omega},K*) we get simple analytical expressions for all observables. Numerical values for {sub {lambda}}{sup 4}He,{sub {lambda}}{sup 5}He, {sub {lambda}}{sup 11}B,{sub {lambda}}{sup 12}C,{sub {lambda}}{sup 16}O, {sub {lambda}}{sup 17}O, and {sub {lambda}}{sup 28}Si hypernuclei are obtained and compared with available experimental data, putting special attention on the asymmetry parameter. We remark that, in the present form, the IPSM gives roughly the same value of a{sub {lambda}} for all hypernuclei in contradiction with experiments. We stress the necessity of introducing configuration mixing to go beyond the IPSM taking into account, in a more realistic way, nuclear structure effects. Moreover, one could to include more relevant degrees of freedom, even within the IPSM framework, like: (i) modifications of the exchange potential (two-pion, a{sub 1} meson, {delta}T=3/2 terms of vector mesons, etc.), (ii) final state interactions accounting for the distortion of the plane waves of emitted nucleons, and (iii) two-nucleon induced decay, as possible ways to solve the puzzle.

Barbero, C.; Mariano, A.; Samana, A. [Departamento de Fisica, Universidad Nacional de La Plata, C. C. 67, 1900 La Plata (Argentina) and Instituto de Fisica CCT La Plata, CONICET, 1900 La Plata (Argentina); Department of Physics, Texas A and M University-Commerce, P. O. Box 3011, Commerce, Texas (United States)

2008-10-15T23:59:59.000Z

204

Groups defined by automata  

E-Print Network (OSTI)

This is Chapter 24 in the "AutoMathA" handbook. Finite automata have been used effectively in recent years to define infinite groups. The two main lines of research have as their most representative objects the class of automatic groups (including word-hyperbolic groups as a particular case) and automata groups (singled out among the more general self-similar groups). The first approach implements in the language of automata some tight constraints on the geometry of the group's Cayley graph, building strange, beautiful bridges between far-off domains. Automata are used to define a normal form for group elements, and to monitor the fundamental group operations. The second approach features groups acting in a finitely constrained manner on a regular rooted tree. Automata define sequential permutations of the tree, and represent the group elements themselves. The choice of particular classes of automata has often provided groups with exotic behaviour which have revolutioned our perception of infinite finitely ge...

Bartholdi, Laurent

2010-01-01T23:59:59.000Z

205

TEC Working Group Background | Department of Energy  

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

TEC Working Group Background TEC Working Group Background TEC Working Group Background Through the TEC/WG, DOE interacted with representatives of organizations at the state, tribal, and local levels to obtain input for program needs assessment, development and management, and to enhance their capability to carry out transportation emergency preparedness and safety activities specifically related to radioactive materials shipments. TEC membership included representatives from national, state, tribal and local government organizations, labor, industry and professional groups. Members meet semiannually to participate in plenary sessions, breakout work sessions, and in more specialized Topic Groups. To learn more about the history and background of TEC, please see the following documents:

206

Fermilab | Employee Advisory Group | Focus Group Report  

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

Phone Book Fermilab at Work Search Search Go Skip over navigation to main content EAG Home About the EAG EAG Members Questions and Answers Suggestions and Questions Focus Group...

207

Bioanalytical Science Group  

Science Conference Proceedings (OSTI)

Bioanalytical Science Group. Welcome. We provide the measurement science, standards, technology, and data required ...

2013-02-08T23:59:59.000Z

208

Lighting Research Group  

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

Lighting Research Group overview what's new publications software facilities people contact us links...

209

Scientific Working Groups  

Science Conference Proceedings (OSTI)

... TWGDAM 1988). SWGDOG, Scientific Working Group on Dogs and Orthogonal Detection Guidelines, 2004. SWGTOX, Scientific ...

2013-07-10T23:59:59.000Z

210

QUANTUM GROUPS JOHAN KUSTERMANS  

E-Print Network (OSTI)

QUANTUM GROUPS JOHAN KUSTERMANS Syllabus: #15; The de#12;nition of a locally compact quantum group: motivational ex- amples and special cases. The classical case, compact and discrete quantum groups. #15 for weights. #15; The general de#12;nition of a locally compact quantum group and its basic consequences

Schürmann, Michael

211

Lattice polymers with two competing collapse interactions  

E-Print Network (OSTI)

There have been separate studies of the polymer collapse transition, where the collapse was induced by two different types of attraction. In each case, the configurations of the polymer were given by the same subset of random walks being self-avoiding trails on the square lattice. Numerical evidence shows that when interacting via nearest-neighbour contacts, this transition is different from the collapse transition in square-lattice trails interacting via multiply visited sites. While both transitions are second-order, when interacting via nearest-neighbour contacts, the transition is relatively weak with a convergent specific heat, while when interacting via multiply visited sites, the specific heat diverges strongly. Moreover, an estimation of the crossover exponent for the nearest-neighbour contact interaction provides a value close to that of the canonical polymer collapse model of interacting self-avoiding walks, which also interact via nearest-neighbour contacts. From computer simulations using the flatPERM algorithm, we extend these studies by considering a model of self-avoiding trails on the square lattice containing both types of interaction, and which therefore contains all three of the models discussed above as special cases. We find that the strong multiply-visited site collapse is a singular point in the phase diagram and corresponds to a higher order multi-critical point separating a line of weak second-order transitions from a line of first-order transitions.

Andrea Bedini; Aleksander L Owczarek; Thomas Prellberg

2013-11-05T23:59:59.000Z

212

Renormalization group aspects of graphene  

E-Print Network (OSTI)

Graphene is a two dimensional crystal of carbon atoms with fascinating electronic and morphological properties. The low energy excitations of the neutral, clean system are described by a massless Dirac Hamiltonian in (2+1) dimensions which also captures the main electronic and transport properties. A renormalization group analysis sheds light on the success of the free model: due to the special form of the Fermi surface which reduces to two single points in momentum space, short range interactions are irrelevant and only gauge interactions like long range Coulomb or effective disorder can play a role in the low energy physics. We review these features and discuss briefly other aspects related to disorder and to the bilayer material along the same lines.

Maria A. H. Vozmediano

2010-10-25T23:59:59.000Z

213

Energy Research Group Staff Page  

Science Conference Proceedings (OSTI)

Energy Research Group Staff. ... Nikolai Zhitenev, Group Leader Nikolai Zhitenev is the Group Leader of the CNST Energy Research Group. ...

2013-11-08T23:59:59.000Z

214

Rational subsets of groups  

E-Print Network (OSTI)

This text, Chapter 23 in the "AutoMathA" handbook, is devoted to the study of rational subsets of groups, with particular emphasis on the automata-theoretic approach to finitely generated subgroups of free groups. Indeed, Stallings' construction, associating a finite inverse automaton with every such subgroup, inaugurated a complete rewriting of free group algorithmics, with connections to other fields such as topology or dynamics. Another important vector in the chapter is the fundamental Benois' Theorem, characterizing rational subsets of free groups. The theorem and its consequences really explain why language theory can be successfully applied to the study of free groups. Rational subsets of (free) groups can play a major role in proving statements (a priori unrelated to the notion of rationality) by induction. The chapter also includes related results for more general classes of groups, such as virtually free groups or graph groups.

Bartholdi, Laurent

2010-01-01T23:59:59.000Z

215

Weak Lensing Determination of the Mass in Galaxy Halos  

E-Print Network (OSTI)

We detect the weak gravitational lensing distortion of 450,000 background galaxies (20projected radius of 200 \\hkpc, the shear profile is consistent with an isothermal profile with circular velocity 164+-20 km/s for an L* galaxy, consistent with typical disk rotation at this luminosity. This halo mass normalization, combined with the halo profile derived by Fischer et al (2000) from lensing analysis SDSS data, places a lower limit of (2.7+-0.6) x 10^{12}h^{-1} solar masses on the mass of an L* galaxy halo, in good agreement with satellite galaxy studies. Given the known luminosity function of LCRS galaxies, and the assumption that $M\\propto L^\\beta$ for galaxies, we determine that the mass within 260\\hkpc of normal galaxies contributes $\\Omega=0.16\\pm0.03$ to the density of the Universe (for $\\beta=1$) or $\\Omega=0.24\\pm0.06$ for $\\beta=0.5$. These lensing data suggest that $0.6agreement with the usual $\\beta\\approx0.5$ Faber-Jackson or Tully-Fisher scaling. This is the most complete direct inventory of the matter content of the Universe to date.

D. R. Smith; G. M. Bernstein; P. Fischer; R. M. Jarvis

2000-10-03T23:59:59.000Z

216

A NEW MEASUREMENT OF THE WEAK MIXING ANGLE  

DOE Green Energy (OSTI)

The E158 experiment at SLAC has made the first measurement of parity violation in electron-electron (Moeller) scattering. The authors report a preliminary result using 50% of the accumulated data sample for the right-left parity-violating cross-section asymmetry (A{sub PV}) in the elastic scattering of 45 and 48 GeV polarized electron beams with unpolarized electrons in a liquid hydrogen target. They find A{sub PV} = (-160 {+-} 21(stat.) {+-} 17(syst.)) {center_dot} 10{sup -9}, with a significance of 6.3{sigma} for observing parity violation. In the context of the Standard Model, this yields a measurement of the weak mixing angle, sin{sup 2} {theta}{sub W}{sup {ovr MS}} (Q{sup 2} = 0.026GeV{sup 2}) = 0.2379 {+-} 0.0016(stat.) {+-} 0.0013(syst.). They also present preliminary results for the first observation of a single-spin transverse asymmetry in Moeller scattering.

Woods, M

2004-02-26T23:59:59.000Z

217

Perpendicular propagating modes for weakly magnetized relativistic degenerate plasma  

SciTech Connect

Using the Vlasov-Maxwell system of equations, the dispersion relations for the perpendicular propagating modes (i.e., X-mode, O-mode, and upper hybrid mode) are derived for a weakly magnetized relativistic degenerate electron plasma. By using the density (n{sub 0}=p{sub F}{sup 3}/3{pi}{sup 2} Planck-Constant-Over-Two-Pi {sup 3}) and the magnetic field values for different relativistic degenerate environments, the propagation characteristics (i.e., cutoff points, resonances, dispersions, and band widths in k-space) of these modes are examined. It is observed that the relativistic effects suppress the effect of ambient magnetic field and therefore the cutoff and resonance points shift towards the lower frequency regime resulting in enhancement of the propagation domain. The dispersion relations of these modes for the non-relativistic limit (p{sub F}{sup 2} Much-Less-Than m{sub 0}{sup 2}c{sup 2}) and the ultra-relativistic limit (p{sub F}{sup 2} Much-Greater-Than m{sub 0}{sup 2}c{sup 2}) are also presented.

Abbas, Gohar; Bashir, M. F. [Salam Chair in Physics, G. C. University Lahore, Punjab 54000 (Pakistan); Department of Physics, G. C. University Lahore, Punjab 54000 (Pakistan); Murtaza, G. [Salam Chair in Physics, G. C. University Lahore, Punjab 54000 (Pakistan)

2012-07-15T23:59:59.000Z

218

Bounds on the number of bound states in the transfer matrix spectrum for some weakly correlated lattice models  

Science Conference Proceedings (OSTI)

We consider the interaction of particles in weakly correlated lattice quantum field theories. In the imaginary time functional integral formulation of these theories there is a relative coordinate lattice Schroedinger operator H which approximately describes the interaction of these particles. Scalar and vector spin, QCD and Gross-Neveu models are included in these theories. In the weakly correlated regime H=H{sub o}+W where H{sub o}=-{gamma}{Delta}{sub l}, 0 lattice Laplacian: {gamma}={beta}, the inverse temperature for spin systems and {gamma}={kappa}{sup 3} where {kappa} is the hopping parameter for QCD. W is a self-adjoint potential operator which may have non-local contributions but obeys the bound Double-Vertical-Line W(x, y) Double-Vertical-Line Less-Than-Or-Slanted-Equal-To cexp ( -a( Double-Vertical-Line x Double-Vertical-Line + Double-Vertical-Line y Double-Vertical-Line )), a large: exp-a={beta}/{beta}{sub o}{sup (1/2)}({kappa}/{kappa}{sub o}) for spin (QCD) models. H{sub o}, W, and H act in l{sub 2}(Z{sup d}), d Greater-Than-Or-Slanted-Equal-To 1. The spectrum of H below zero is known to be discrete and we obtain bounds on the number of states below zero. This number depends on the short range properties of W, i.e., the long range tail does not increase the number of states.

O'Carroll, Michael [Departamento de Matematica Aplicada e Estatistica, ICMC-USP, C.P. 668,13560-970 Sao Carlos, Sao Paulo (Brazil)

2012-07-15T23:59:59.000Z

219

Student Common Interest Group  

Science Conference Proceedings (OSTI)

Students interested in the oils and fats industry make valuable networking connections by joining the AOCS Student Common Interest Group. Student Common Interest Group Student Membership achievement aocs application award awards distinguished divi

220

Quantum Chevalley groups  

E-Print Network (OSTI)

The goal of this paper is to construct quantum analogues of Chevalley groups inside completions of quantum groups or, more precisely, inside completions of Hall algebras of finitary categories.

Berenstein, Arkady

2012-01-01T23:59:59.000Z

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221

The Yi Liu Group - Home  

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

Research Research Group Members News Publications Contacts Home Research Group Members News Publications Contacts - A supramolecular approach to better n-type organic field effect transistors. Soon in Adv. Mater. - Electron donors, acceptors, and host-guest complexes enable supramolecular networks in action. See the trio publications on J. Am. Chem. Soc., Polym. Chem., and Chem. Eur. J. - Encaged! Not one, not two, but three. Three-fold clipping leads to triply threaded interlocked structures. Soon in Angew. Chem. Int. Ed. - Strongly interacting C3-symmetric donor-acceptor pairs made its way to Chem. Sci. - Check out our recent report on organic semi- conductors and molecular switches at Appl. Mat. Inter. and Agnew. Chem. Int. Ed. - Advances in efficient bio- orthogonal labeling - soon in Agnew. Chem.

222

Phase-only shaped laser pulses in optimal control theory: Application to indirect photofragmentation dynamics in the weak-field limit  

SciTech Connect

We implement phase-only shaped laser pulses within quantum optimal control theory for laser-molecule interaction. This approach is applied to the indirect photofragmentation dynamics of NaI in the weak-field limit. It is shown that optimized phase-modulated pulses with a fixed frequency distribution can substantially modify transient dissociation probabilities as well as the momentum distribution associated with the relative motion of Na and I.

Shu, Chuan-Cun; Henriksen, Niels E. [Department of Chemistry, Building 207, Technical University of Denmark, DK-2800, Kongens Lyngby (Denmark)

2012-01-28T23:59:59.000Z

223

Microanalysis Research Group Staff  

Science Conference Proceedings (OSTI)

*. Bookmark and Share. Microanalysis Research Group Staff. ... Joseph M. Conny, Research Chemist. Jeff M. Davis, Materials Research Engineer. ...

2013-05-15T23:59:59.000Z

224

Hydrogen Analysis Group  

DOE Green Energy (OSTI)

NREL factsheet that describes the general activites of the Hydrogen Analysis Group within NREL's Hydrogen Technologies and Systems Center.

Not Available

2008-03-01T23:59:59.000Z

225

Retrieval Group Digital Video  

Science Conference Proceedings (OSTI)

This site is no longer in use and will soon disappear entirely. The Retrieval Group Information Access Division Last updated ...

226

Working Group 7 Summary  

SciTech Connect

The primary subject of working group 7 at the 2012 Advanced Accelerator Concepts Workshop was muon accelerators for a muon collider or neutrino factory. Additionally, this working group included topics that did not fit well into other working groups. Two subjects were discussed by more than one speaker: lattices to create a perfectly integrable nonlinear lattice, and a Penning trap to create antihydrogen.

Nagaitsev S.; Berg J.

2012-06-10T23:59:59.000Z

227

BUOYANCY INSTABILITIES IN A WEAKLY COLLISIONAL INTRACLUSTER MEDIUM  

SciTech Connect

The intracluster medium (ICM) of galaxy clusters is a weakly collisional plasma in which the transport of heat and momentum occurs primarily along magnetic-field lines. Anisotropic heat conduction allows convective instabilities to be driven by temperature gradients of either sign: the magnetothermal instability (MTI) in the outskirts of clusters and the heat-flux buoyancy-driven instability (HBI) in their cooling cores. We employ the Athena magnetohydrodynamic code to investigate the nonlinear evolution of these instabilities, self-consistently including the effects of anisotropic viscosity (i.e., Braginskii pressure anisotropy), anisotropic conduction, and radiative cooling. We find that, in all but the innermost regions of cool-core clusters, anisotropic viscosity significantly impairs the ability of the HBI to reorient magnetic-field lines orthogonal to the temperature gradient. Thus, while radio-mode feedback appears necessary in the central few Multiplication-Sign 10 kpc, heat conduction may be capable of offsetting radiative losses throughout most of a cool core over a significant fraction of the Hubble time. Magnetically aligned cold filaments are then able to form by local thermal instability. Viscous dissipation during cold filament formation produces accompanying hot filaments, which can be searched for in deep Chandra observations of cool-core clusters. In the case of MTI, anisotropic viscosity leads to a nonlinear state with a folded magnetic field structure in which field-line curvature and field strength are anti-correlated. These results demonstrate that, if the HBI and MTI are relevant for shaping the properties of the ICM, one must self-consistently include anisotropic viscosity in order to obtain even qualitatively correct results.

Kunz, Matthew W.; Stone, James M. [Department of Astrophysical Sciences, Princeton University, Peyton Hall, 4 Ivy Lane, Princeton, NJ 08544 (United States); Bogdanovic, Tamara; Reynolds, Christopher S., E-mail: kunz@astro.princeton.edu, E-mail: jstone@astro.princeton.edu, E-mail: tamarab@astro.umd.edu, E-mail: chris@astro.umd.edu [Department of Astronomy, University of Maryland, College Park, MD 20742 (United States)

2012-08-01T23:59:59.000Z

228

Elementary particle interactions. [Dept. of Physics and Astronomy, Univ. of Tennessee, Knoxville, Tennessee  

SciTech Connect

Work continues on strange particle production in weak interactions using data from a high-energy neutrino exposure in a freon bubble chamber. Meson photoproduction has also consumed considerable effort. Detector research and development activities have been carried out.

Bugg, W.M.; Condo, G.T.; Handler, T.; Hart, E.L.; Read, K.; Ward, B.F.L.

1992-10-01T23:59:59.000Z

229

Elementary particle interactions. Progress report, October 1, 1991--September 30, 1992  

Science Conference Proceedings (OSTI)

Work continues on strange particle production in weak interactions using data from a high-energy neutrino exposure in a freon bubble chamber. Meson photoproduction has also consumed considerable effort. Detector research and development activities have been carried out.

Bugg, W.M.; Condo, G.T.; Handler, T.; Hart, E.L.; Read, K.; Ward, B.F.L.

1992-10-01T23:59:59.000Z

230

Geomechanical and weathering properties of weak roof shales in coal mines.  

E-Print Network (OSTI)

??Many coal seams have weak shale immediate roofs that cause ground control problems. Therefore, it is important to know the properties of these shales so… (more)

Gurgenli, Hakan.

2006-01-01T23:59:59.000Z

231

ON DARK PEAKS AND MISSING MASS: A WEAK-LENSING MASS RECONSTRUCTION OF THE MERGING CLUSTER SYSTEM A520 ,  

SciTech Connect

Merging clusters of galaxies are unique in their power to directly probe and place limits on the self-interaction cross-section of dark matter. Detailed observations of several merging clusters have shown the intracluster gas to be displaced from the centroids of dark matter and galaxy density by ram pressure, while the latter components are spatially coincident, consistent with collisionless dark matter. This has been used to place upper limits on the dark matter particle self-interaction cross-section of order 1 cm{sup 2} g{sup -1}. The cluster A520 has been seen as a possible exception. We revisit A520 presenting new Hubble Space Telescope Advanced Camera for Surveys mosaic images and a Magellan image set. We perform a detailed weak-lensing analysis and show that the weak-lensing mass measurements and morphologies of the core galaxy-filled structures are mostly in good agreement with previous works. There is, however, one significant difference: We do not detect the previously claimed 'dark core' that contains excess mass with no significant galaxy overdensity at the location of the X-ray plasma. This peak has been suggested to be indicative of a large self-interaction cross-section for dark matter (at least {approx}5{sigma} larger than the upper limit of 0.7 cm{sup 2} g{sup -1} determined by observations of the Bullet Cluster). We find no such indication and instead find that the mass distribution of A520, after subtraction of the X-ray plasma mass, is in good agreement with the luminosity distribution of the cluster galaxies. We conclude that A520 shows no evidence to contradict the collisionless dark matter scenario.

Clowe, Douglas [Department of Physics and Astronomy, Ohio University, 251B Clippinger Labs, Athens, OH 45701 (United States); Markevitch, Maxim [NASA Goddard Space Flight Center, Code 662, 8800 Greenbelt Road, Greenbelt, MD 20706 (United States); Bradac, Marusa [Department of Physics, University of California, One Shields Avenue, Davis, CA 95616 (United States); Gonzalez, Anthony H.; Chung, Sun Mi [Department of Astronomy, University of Florida, 211 Bryant Space Science Center, Gainesville, FL 32611 (United States); Massey, Richard [Department of Physics, Durham University, South Road, Durham DH1 3LE (United Kingdom); Zaritsky, Dennis, E-mail: clowe@ohio.edu [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)

2012-10-20T23:59:59.000Z

232

Trails Working Group  

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

Trails Working Group Trails Working Group Trails Working Group Our mission is to inventory, map, and prepare historical reports on the many trails used at LANL. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email The LANL Trails Working Group inventories, maps, and prepares historical reports on the many trails used at LANL. Some of these trails are ancient pueblo footpaths that continue to be used for recreational hiking today. Some serve as quiet and non-motorized alternatives between the Townsite and LANL or between technical areas. The Trails Working Group, established in December 2003, includes representatives from local citizen hiking groups, Los Alamos County, Forest Service, Park Service, Los Alamos National Laboratory and the NNSA Los

233

Interagency Advanced Power Group, Solar Working Group: Meeting minutes  

SciTech Connect

This report is the minutes of the Solar Working group. The meeting was prompted by the Steering Group`s desire to resolve issues the Solar Working Group.

Not Available

1993-10-14T23:59:59.000Z

234

1451 Group 0  

Science Conference Proceedings (OSTI)

... It defines a set of implementaition-independent application programming interface (API) as needed. Website: http://grouper.ieee.org/groups/1451/0/.

2013-06-27T23:59:59.000Z

235

LBNL Community Advisory Group  

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

to search page 7 - Privacy policy 8 - Terms of use 9 - Go to contactcomment page LBNL Community Advisory Group: HOME CALENDAR FEEDBACK HOME About the Community Advisory...

236

Image Group Homepage  

Science Conference Proceedings (OSTI)

... The Group works to support the needs for Homeland Security Presidential Directive (HSPD)-12 and the Personal Identity Verification (PIV) card for ...

2013-07-16T23:59:59.000Z

237

Grid Integration Group  

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

Grid Integration Group The Demand Response Research Center (DRRC) conducts research that advances the near-term adoption of demand response (DR) technologies, policies, programs,...

238

Electron Physics Group Homepage  

Science Conference Proceedings (OSTI)

... Group conducts wide ranging, cross-disciplinary research ... phenomenon known as spin transfer torque, a ... energy and generates heat, creating two ...

2012-07-20T23:59:59.000Z

239

Hydrogen Technologies Group  

DOE Green Energy (OSTI)

The Hydrogen Technologies Group at the National Renewable Energy Laboratory advances the Hydrogen Technologies and Systems Center's mission by researching a variety of hydrogen technologies.

Not Available

2008-03-01T23:59:59.000Z

240

NERSC Users Group  

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

Policies Data Analytics & Visualization Science Gateways User Surveys NERSC Users Group Teleconferences Annual Meetings NUGEX Elections Charter User Announcements Help Operations...

Note: This page contains sample records for the topic "group weak interactions" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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to obtain the most current and comprehensive results.


241

Scientific Interest Groups  

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

Catalysis High Pressure LiquidSoft-Matter Surface Scattering Powder Diffraction SAXS Surface & Interface Scattering XAS X-ray Micros.Imaging Scientific Interest Groups...

242

Tribal Topic Group Summary  

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

* Email information on Indian 101 course to Tribal Topic Group * Government panel at future TEC on impacts of broader hazmat transportation spectrum * Set up next conference...

243

MEMS Test Working Group  

Science Conference Proceedings (OSTI)

... p2. Top view of cantilevers in in-plane length group. p1. Unconventional anchor design. Same anchor design as in thickness test structures. ...

2013-05-03T23:59:59.000Z

244

Particle Data Group - Products  

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

Group HOME: pdgLive Summary Tables Reviews, Tables, Plots Particle Listings Europe, Africa, Middle East, India, Pakistan, Russia and all other countries For copies of: ...

245

Standards Working Groups - Logistics  

Science Conference Proceedings (OSTI)

... group is to define practices and test methods related to the overall deployment procedures and constraints in place for emergency response. ...

2011-01-03T23:59:59.000Z

246

TMS Group Savings Plus  

Science Conference Proceedings (OSTI)

A money-saving group discount on auto and homeowners policies; Convenient payment plans Including automatic checking account deduction or direct home ...

247

Renormalization group flow for noncommutative Fermi liquids  

Science Conference Proceedings (OSTI)

Some recent studies of the AdS/CFT correspondence for condensed matter systems involve the Fermi liquid theory as a boundary field theory. Adding B-flux to the boundary D-branes leads in a certain limit to the noncommutative Fermi liquid, which calls for a field theory description of its critical behavior. As a preliminary step to more general consideration, the modification of the Landau's Fermi liquid theory due to noncommutativity of spatial coordinates is studied in this paper. We carry out the renormalization of interactions at tree level and one loop in a weakly coupled fermion system in two spatial dimensions. Channels ZS, ZS' and BCS are discussed in detail. It is shown that while the Gaussian fixed-point remains unchanged, the BCS instability is modified due to the space noncommutativity.

Estrada-Jimenez, Sendic [Centro de Estudios en Fisica y Matematicas Basicas y Aplicadas, Universidad Autonoma de Chiapas, Calle 4a Oriente Norte 1428 Tuxtla Gutierrez, Chiapas (Mexico); Garcia-Compean, Hugo [Departamento de Fisica, Centro de Investigacion y de Estudios Avanzados del IPN P.O. Box 14-740, 07000 Mexico D.F. (Mexico); Wu Yongshi [Department of Physics and Astronomy, University of Utah Salt Lake City, Utah 84112 (United States); Department of Physics, Fudan University, Shanghai 200433 (China)

2011-06-15T23:59:59.000Z

248

Electron Physics Group Staff Page  

Science Conference Proceedings (OSTI)

... Electron Physics Group Staff. ... Jabez McClelland, Group Leader Jabez McClelland is the Group Leader of the CNST Electron Physics Group. ...

2013-07-26T23:59:59.000Z

249

Detecting of Coal Gas Weak Signals Using Lyapunov Exponent under Strong Noise Background  

Science Conference Proceedings (OSTI)

In coal gas monitoring system, the early detecting of gas concentration is key technique for preventing the gas explosion because the coal gas signals are very weak under strong noise background in mining digging laneway. In this paper, the coal gas ... Keywords: Coal gas, weak signals, coal mine underground, Lyapunov exponent, Duffing chaotic oscillator

Ma Xian-Min

2013-01-01T23:59:59.000Z

250

Unbalanced Load Flow for Weakly Meshed Distribution Systems with Distributed Generation  

Science Conference Proceedings (OSTI)

Distributed Generation (DG) can bring support to distribution system, meanwhile, it bring unbalancedness in power source, load and line. Traditional load flow algorithms are not applicable to the weakly meshed distribution system with DGs. First, this ... Keywords: weakly meshed distribution system, distributed generation, unbalanced load flow, sensitivity compensation

Shao-Qiang Hu; Sen-Mao Li

2010-06-01T23:59:59.000Z

251

Weakly-supervised discovery of named entities using web search queries  

Science Conference Proceedings (OSTI)

A seed-based framework for textual information extraction allows for weakly supervised extraction of named entities from anonymized Web search queries. The extraction is guided by a small set of seed named entities, without any need for handcrafted extraction ... Keywords: knowledge acquisition, named entities, query logs, unstructured text, weakly supervised information extraction

Marius Pa?ca

2007-11-01T23:59:59.000Z

252

Bootstrapping a hop-optimal network in the weak sensor model  

Science Conference Proceedings (OSTI)

Sensor nodes are very weak computers that get distributed at random on a surface. Once deployed, they must wake up and form a radio network. Sensor network bootstrapping research thus has three parts: One must model the restrictions on sensor nodes; ... Keywords: Ad hoc network, contention resolution, maximal independent set, radio network, random geometric graphs, sensor network, weak sensor model

Martin Farach-Colton; Rohan J. Fernandes; Miguel A. Mosteiro

2009-10-01T23:59:59.000Z

253

Weakly nonlocal non-equilibrium thermodynamics - variational principles and Second Law  

E-Print Network (OSTI)

A general, uniform, rigorous and constructive thermodynamic approach to weakly nonlocal non-equilibrium thermodynamics is reviewed. A method is given to construct and restrict the evolution equations of physical theories according to the Second Law of thermodynamics and considering weakly nonlocal constitutive state spaces. The evolution equations of internal variables, the classical irreversible thermodynamics and Korteweg fluids are treated.

Ván, P

2009-01-01T23:59:59.000Z

254

Focusing of weak shock waves and the von Neumann paradox of oblique shock reflection  

E-Print Network (OSTI)

Focusing of weak shock waves and the von Neumann paradox of oblique shock reflection Esteban G of weak shock waves at small angles are considered: the focusing of curved fronts at a&es, the transition between regular and irregular reflection of oblique shock waves on rigid walls and the diffraction

Tabak, Esteban G.

255

Interagency Working Groups (IWGs)  

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

Interagency Working Groups (IWGs) Print E-mail Interagency Working Groups (IWGs) Print E-mail Interagency Working Groups (IWGs) are the primary USGCRP vehicles for implementing and coordinating research activities within and across agencies. These groups are critical to Program integration and in assessing the Program's progress. The working groups span a wide range of interconnected issues of climate and global change, and address major components of the Earth's environmental and human systems, as well as cross-disciplinary approaches for addressing these issues. IWGs correspond to program functions and are designed to bring agencies together to plan and develop coordinated activities, implement joint activities, and identify and fill gaps in the Program's plans. They allow public officials to communicate with each other on emerging directions within their agencies, on their stakeholder needs, and on best practices learned from agency activities. Together, these functions allow the agencies to work in a more coordinated and effective manner.

256

Steering Group Report  

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

Steering Steering Group Report Fermilab Director Pier Oddone convened the Fermilab Steering Group in March 2007. Members comprised particle and accelerator scientists from Fermilab and the national community. Fermilab Deputy Director Young-Kee Kim served as chair. The Steering Group subsequently formed subgroups to provide advice on the best physics opportunities that new facilities could offer. These subgroups drew upon university and laboratory scientists largely from outside Fermilab. The Steering Group took a number of steps to obtain as much input as possible from a broad spectrum of the U.S. particle- and accelerator-physics community. The Steering Group chair gave presentations and conducted town-hall-style sessions at meetings of all the major collaborations at Fermilab (CDF, DZero, MINOS, MINERνA,

257

Topic Group Participants  

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

Topic Group Report Topic Group Report Presented to: Transportation External Coordination Working Group April 5, 2005 Phoenix, Arizona Recent 180(c) Topic Group Activities Issue Papers 1. Funding Distribution Method 2. Allowable Activities 3. Definitions 4. Pass-Through Requirements 5. Contingency Plans 6. 180(c) Policy or Rulemaking 7. Timing and Eligibility* 8. Funding for Related Activities* 9. State Fees* 10. Funding Allocation Approach* 180(c) Policy & Procedures * Executive Summary * Draft Policy & Procedures * Draft Grant Application Pckg * Appendix *Papers 7-10 still under discussion Today's Discussion Items * Reviewed Topic Group member comments on a variety of issues * Key issues included: - Funding allocation and timing of grants - Planning grants - State fees/matching requirements - Related non-training activities

258

Extension of the weak-line approximation and application to correlated-k methods  

Science Conference Proceedings (OSTI)

Global climate models require accurate and rapid computation of the radiative transfer through the atmosphere. Correlated-k methods are often used. One of the approximations used in correlated-k models is the weakline approximation. We introduce an approximation T/sub g/ which reduces to the weak-line limit when optical depths are small, and captures the deviation from the weak-line limit as the extinction deviates from the weak-line limit. This approximation is constructed to match the first two moments of the gamma distribution to the k-distribution of the transmission. We compare the errors of the weak-line approximation with T/sub g/ in the context of a water vapor spectrum. The extension T/sub g/ is more accurate and converges more rapidly than the weak-line approximation.

Conley, A.J.; Collins, W.D.

2011-03-15T23:59:59.000Z

259

Applications of Laminar Weak-Link Mechanisms for Ultraprecision Synchrotron Radiation Instruments  

Science Conference Proceedings (OSTI)

Unlike traditional kinematic flexure mechanisms, laminar overconstrained weak-link mechanisms provide much higher structure stiffness and stability. Using a laminar structure configured and manufactured by chemical etching and lithography techniques, we are able to design and build linear and rotary weak-link mechanisms with ultrahigh positioning sensitivity and stability for synchrotron radiation applications. Applications of laminar rotary weak-link mechanism include: high-energy-resolution monochromators for inelastic x-ray scattering and x-ray analyzers for ultra-small-angle scattering and powder-diffraction experiments. Applications of laminar linear weak-link mechanism include high-stiffness piezo-driven stages with subnanometer resolution for an x-ray microscope. In this paper, we summarize the recent designs and applications of the laminar weak-link mechanisms at the Advanced Photon Source.

Shu, D.; Toellner, T. S.; Alp, E. E.; Maser, J.; Ilavsky, J.; Shastri, S. D.; Lee, P. L.; Narayanan, S.; Long, G. G. [Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439 (United States)

2007-01-19T23:59:59.000Z

260

On A^1-fundamental groups of isotropic reductive groups.  

E-Print Network (OSTI)

We discuss A^1-fundamental groups of isotropic reductive groups. Using homotopy invariance of group homology in one variable, we identify the sections of A^1-fundamental group sheaves of an isotropic reductive group G over an infinite field k with the second homology group of the group G(k). This provides explicit loops representing elements in the A^1-fundamental groups.

Konrad Voelkel; Matthias Wendt

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We encourage you to perform a real-time search of NLEBeta
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261

TEC Working Group Background | Department of Energy  

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

Background Background TEC Working Group Background Through the TEC/WG, DOE interacted with representatives of organizations at the state, tribal, and local levels to obtain input for program needs assessment, development and management, and to enhance their capability to carry out transportation emergency preparedness and safety activities specifically related to radioactive materials shipments. TEC membership included representatives from national, state, tribal and local government organizations, labor, industry and professional groups. Members meet semiannually to participate in plenary sessions, breakout work sessions, and in more specialized Topic Groups. To learn more about the history and background of TEC, please see the following documents: TEC Charter TEC Work Plan

262

TEC Working Group Topic Groups Rail Conference Call Summaries...  

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

Conference Call Summaries Rail Topic Group TEC Working Group Topic Groups Rail Conference Call Summaries Rail Topic Group Rail Topic Group May 17, 2007 January 16, 2007 August 31,...

263

The Eightfold Way: A Theory of Strong Interaction Symmetry  

DOE R&D Accomplishments (OSTI)

A new model of the higher symmetry of elementary particles is introduced ln which the eight known baryons are treated as a supermultiplet, degenerate in the limit of unitary symmetry but split into isotopic spin multiplets by a symmetry-breaking term. The symmetry violation is ascribed phenomenologically to the mass differences. The baryons correspond to an eight-dimensional irreducible representation of the unitary group. The pion and K meson fit into a similar set of eight particles along with a predicted pseudoscalar meson X {sup o} having I = 0. A ninth vector meson coupled to the baryon current can be accommodated naturally in the scheme. It is predicted that the eight baryons should all have the same spin and parity and that pseudoscalar and vector mesons should form octets with possible additional singlets. The mathematics of the unitary group is described by considering three fictitious leptons, nu , e {sup -}, and mu {sup -}, which may throw light on the structure of weak interactions. (D. L.C.)

Gell-Mann, M.

1961-03-15T23:59:59.000Z

264

Indoor Environment Group  

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

Indoor Environment Group Indoor Environment Group The Indoor Environment Group performs research that aims to maintain healthy and productive indoor environments while buildings are made more energy efficient. We study the links between indoor environmental quality, building ventilation, building energy efficiency and occupants' health, performance and comfort. We undertake experiments in laboratory and field settings and employ modeling to characterize indoor environmental conditions and evaluate the fate, transport and chemical transformations of indoor pollutants. We elucidate pathways of pollutant exposure, evaluate and develop energy efficient means of controlling indoor environmental quality, and provide input for related guidelines and standards. Contacts William Fisk WJFisk@lbl.gov (510) 486-5910

265

SI Group Scheduling Page  

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

Personnel On-Call Page Beamline Validation Schedule Group Organizational Chart Reviews Presentations Group Scheduling Page Project Scheduling Information Ops Scheduling Info Project / Scheduling Info APS fy2005 Annual Schedule ( html ) PSS Validation Schedule APS fy2006 Annual Schedule (html) PSS Validation Teams Latest Machine Studies Schedule (pdf) (html) New Builds Schedule (For SI GROUP Reference Only) Parasitic Beam Operations Schedule Ops Scheduling Page Shutdown Information Work Schedules August/September Shutdown Shutdown Work List Validation Schedule Safety Info Work Request Links ISM Core Functions Enter / Search Work Requests APS Safety Page Modify / Approve Work Requests Radiation Safety Policy APS TMS Training Profiles MSDS Search This page maintained by Joe Budz

266

Fermilab Steering Group Report  

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

Steering Group Steering Group Eugene Beier University of Pennsylvania Joel Butler Fermi National Accelerator Laboratory Sally Dawson Brookhaven National Laboratory Helen Edwards Fermi National Accelerator Laboratory Thomas Himel Stanford Linear Accelerator Center Stephen Holmes Fermi National Accelerator Laboratory Young-Kee Kim, Chair Fermi National Accelerator Laboratory/ University of Chicago Andrew Lankford University of California, Irvine David McGinnis Fermi National Accelerator Laboratory Sergei Nagaitsev Fermi National Accelerator Laboratory Tor Raubenheimer Stanford Linear Accelerator Center Vladimir Shiltsev Fermi National Accelerator Laboratory Maury Tigner Cornell University Hendrik Weerts Argonne National Laboratory Contributors Neutrino Physics Group Eugene Beier University of Pennsylvania

267

Group key management  

SciTech Connect

This report describes an architecture and implementation for doing group key management over a data communications network. The architecture describes a protocol for establishing a shared encryption key among an authenticated and authorized collection of network entities. Group access requires one or more authorization certificates. The implementation includes a simple public key and certificate infrastructure. Multicast is used for some of the key management messages. An application programming interface multiplexes key management and user application messages. An implementation using the new IP security protocols is postulated. The architecture is compared with other group key management proposals, and the performance and the limitations of the implementation are described.

Dunigan, T.; Cao, C.

1997-08-01T23:59:59.000Z

268

The Global Renormalization Group Trajectory in a Critical Supersymmetric Field Theory on the Lattice Z^3  

E-Print Network (OSTI)

We consider an Euclidean supersymmetric field theory in $Z^3$ given by a supersymmetric $\\Phi^4$ perturbation of an underlying massless Gaussian measure on scalar bosonic and Grassmann fields with covariance the Green's function of a (stable) L\\'evy random walk in $Z^3$. The Green's function depends on the L\\'evy-Khintchine parameter $\\alpha={3+\\epsilon\\over 2}$ with $00$ sufficiently small and initial parameters held in an appropriate domain the existence of a global renormalization group trajectory uniformly bounded on all renormalization group scales and therefore on lattices which become arbitrarily fine. At the same time we establish the existence of the critical (stable) manifold. The interactions are uniformly bounded away from zero on all scales and therefore we are constructing a non-Gaussian supersymmetric field theory on all scales. The interest of this theory comes from the easily established fact that the Green's function of a (weakly) self-avoiding L\\'evy walk in $Z^3$ is a second moment (two po...

Mitter, P K

2007-01-01T23:59:59.000Z

269

Hyperfine interaction and magnetoresistance in organic semiconductors  

E-Print Network (OSTI)

We explore the possibility that hyperfine interaction causes the recently discovered organic magnetoresistance (OMAR) effect. Our study employs both experiment and theoretical modelling. An excitonic pair mechanism model based on hyperfine interaction, previously suggested by others to explain magnetic field effects in organics, is examined. Whereas this model can explain a few key aspects of the experimental data, we, however, uncover several fundamental contradictions as well. By varying the injection efficiency for minority carriers in the devices, we show experimentally that OMAR is only weakly dependent on the ratio between excitons formed and carriers injected, likely excluding any excitonic effect as the origin of OMAR.

Y. Sheng; D. T. Nguyen; G. Veeraraghavan; Ö. Mermer; M. Wohlgenannt; U. Scherf

2006-02-10T23:59:59.000Z

270

Fermionic-bosonic couplings in a weakly deformed odd-mass nucleus, {sub 41}{sup 93}Nb  

SciTech Connect

A comprehensive level scheme of {sup 93}Nb below 2 MeV has been constructed from information obtained with the {sup 93}Nb(n,n{sup '{gamma}}) and the {sup 94}Zr(p,2n{gamma}{gamma}){sup 93}Nb reactions. Branching ratios, lifetimes, transition multipolarities, and spin assignments have been determined. From M1 and E2 strengths, fermionic-bosonic excitations of isoscalar and isovector characters have been identified from the weak couplings of the {pi}1g{sub 9/2} x {sub 40}{sup 92}Zr and {pi}2p{sub 1/2}{sup -1} x {sub 42}{sup 94}Mo configurations. A microscopic interpretation of such excitations is obtained from shell-model calculations, which use low-momentum effective interactions.

Orce, J. N. [Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States); TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3 (Canada); Holt, J. D. [TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3 (Canada); Physics Division, Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, Tennessee 37831 (United States); Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States); Linnemann, A.; Fransen, C.; Jolie, J.; Warr, N. [Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany); McKay, C. J.; McEllistrem, M. T. [Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States); Kuo, T. T. S. [Department of Physics and Astronomy, Nuclear Structure Laboratory, SUNY, Stony Brook, New York 11794-3800 (United States); Lesher, S. R. [Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States); Department of Physics, University of Wisconsin-La Crosse, 1725 State Street, La Crosse, Wisconsin 54601 (United States); Pietralla, N. [Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany); Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany); Werner, V. [Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany); Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8120 (United States); Yates, S. W. [Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States); Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)

2010-10-15T23:59:59.000Z

271

Focus Group I  

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

CARBON SEQUESTRATION - A COMMUNITY FOCUS GROUP STUDY OF CARBON SEQUESTRATION - A COMMUNITY FOCUS GROUP STUDY OF ATTITUDES IN WILLISTON, NORTH DAKOTA Sheila K. Hanson, Energy & Environmental Research Center Daniel J. Daly, Energy & Environmental Research Center Edward N. Steadman, Energy & Environmental Research Center John A. Harju, Energy & Environmental Research Center June 2005 EXECUTIVE SUMMARY In April 2005, representatives of the Plains CO 2 Reduction (PCOR) Partnership, led by the Energy & Environmental Research Center (EERC) at the University of North Dakota, held two focus groups in Williston, North Dakota. A total of sixteen people participated; seven on April 20 and nine on April 21. The purpose of the focus group research was to gain insight into the public perception of carbon sequestration from

272

Fermilab | Employee Advisory Group  

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

Phone Book Fermilab at Work Search Search Go Skip over navigation to main content EAG Home About the EAG EAG Members Questions and Answers Suggestions and Questions Focus Group...

273

Security Topic Group  

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

Group Group Security and TEC * Tension exists between open forum concept of TEC and the ability of STG members to discuss security topics. - DOE will maintain the open forum - it will not form a subgroup of cleared members NAS Study * Some members want STG to formally recommend a fully independent review of security issues - DOE is reviewing the NAS study and has not formulated a position Security Topic Group (Continued) Classification Guide & Information Sharing Protocol * Guide is finished and undergoing internal concurrence - Slated for late September release * Protocol will be completed once the guide is issued Security-Related Lessons Learned * Lessons learned document was distributed and comments requested by the end of March Security Topic Group (Continued) SRG/CVSA Survey

274

File Groups at NERSC  

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

with another user "jimi", but does not want other members of bigsci to be able to see the data, the PI for Big Science could create a new group (for example, "ejdata", for elvis...

275

LBNL Community Advisory Group  

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

page 1 - Go to home page 2 - Go to search page 7 - Privacy policy 8 - Terms of use 9 - Go to contactcomment page LBNL Community Advisory Group: HOME CALENDAR...

276

The Ren Group - Home  

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

Ren Group Home Research Members Publications ContactsLinks NEWS Dec 15, 2012 Host an Electron Tomography Workshop with Peter Ercius at NCEM from Jan. 16-18th, 2013. Nov 20, 2012...

277

Particle Data Group - Authors  

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

of Warwick, Coventry, CV4 7AL, UK Top B. Krusche Institute of Physics University of Basel CH-4056 Basel, Switzerland Top Yu. Kuyanov COMPAS Group IHEP Protvino, RU-142284...

278

Chemical Reference Data Group Homepage  

Science Conference Proceedings (OSTI)

Chemical Reference Data Group. Welcome. The Chemical Reference Data Group compiles, evaluates, correlates and measures ...

2013-07-10T23:59:59.000Z

279

Multiplexed Biomolecular Science Group Homepage  

Science Conference Proceedings (OSTI)

Multiplexed Biomolecular Science Group. Welcome. The Multiplexed Biomolecular Science Group conducts research in ...

2012-10-06T23:59:59.000Z

280

Cyber Infrastructure Group Home Page  

Science Conference Proceedings (OSTI)

Cyber Infrastructure Group. Welcome. The Cyber Infrastructure Group (775.04) addresses the integration and interoperability ...

2012-07-17T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

NIST Laser Applications Group Homepage  

Science Conference Proceedings (OSTI)

Laser Applications Group. Welcome. The Laser Applications Group advances laser technology for applications in optical ...

2012-05-10T23:59:59.000Z

282

Multiplexed Biomolecular Science Group Staff  

Science Conference Proceedings (OSTI)

*. Bookmark and Share. Members of the Multiplexed Biomolecular Science Group. Dr. Marc Salit (Group Leader). Autumn ...

2012-10-06T23:59:59.000Z

283

Data Plots of Run I - III Results from SLAC E-158: A precision Measurement of the Weak Mixing Angle in Moller Scattering  

DOE Data Explorer (OSTI)

Three physics runs were made in 2002 and 2003 by E-158. As a result, the E-158 Collaboration announced that it had made "the first observation of Parity Violation in electron-electron (Moller) scattering). This precise Parity Violation measurement gives the best determination of the electron's weak charge at low energy (low momentum transfer between interacting particles). E158's measurement tests the predicted running (or evolution) of this weak charge with energy, and searches for new phenomena at TeV energy scales (one thousand times the proton-mass energy scale).[Copied from the experiment's public home page at http://www-project slac.stanford.edu/3158/Default.htm] See also the E158 page for collaborators at http://www.slac.stanford.edu/exp/e158/. Both websites provide data and detailed information.

None

284

CAVITY LIKE COMPLETIONS IN WEAK SANDS PREFERRED UPSTREAM MANAGEMENT PRACTICES  

SciTech Connect

The technology referred to as Cavity Like Completions (CLC) offers a new technique to complete wells in friable and unconsolidated sands. A successfully designed CLC provides significant increases in well PI (performance index) at lower costs than alternative completion techniques. CLC technology is being developed and documented by a partnership of major oil and gas companies through a GPRI (Global Petroleum Research Institute) joint venture. Through the DOE-funded PUMP program, the experiences of the members of the joint venture will be described for other oil and gas producing companies. To date six examples of CLC completions have been investigated by the JV. The project was performed to introduce a new type of completion (or recompletion) technique to the industry that, in many cases, offers a more cost effective method to produce oil and gas from friable reservoirs. The project's scope of work included: (1) Further develop theory, laboratory and field data into a unified model to predict performance of cavity completion; (2) Perform at least one well test for cavity completion (well provided by one of the sponsor companies); (3) Provide summary of geo-mechanical models for PI increase; and (4) Develop guidelines to evaluate success of potential cavity completion. The project tracks the experiences of a joint industry consortium (GPRI No. 17) over a three year period and compiles results of the activities of this group.

Ian Palmer; John McLennan

2004-04-30T23:59:59.000Z

285

Anisotropy in the Interaction of Ultracold Dysprosium  

E-Print Network (OSTI)

The nature of the interaction between ultracold atoms with a large orbital and spin angular momentum has attracted considerable attention. It was suggested that such interactions can lead to the realization of exotic states of highly correlated matter. Here, we report on a theoretical study of the competing anisotropic dispersion, magnetic dipole-dipole, and electric quadrupole-quadrupole forces between two dysprosium atoms. Each dysprosium atom has an orbital angular momentum L=6 and magnetic moment $\\mu=10\\mu_B$. We show that the dispersion coefficients of the ground state adiabatic potentials lie between 1865 a.u. and 1890 a.u., creating a non-negligible anisotropy with a spread of 25 a.u. and that the electric quadrupole-quadrupole interaction is weak compared to the other interactions. We also find that for interatomic separations $Rrates that are the same order of magnitude as the experimental value.

Svetlana Kotochigova; Alexander Petrov

2011-04-28T23:59:59.000Z

286

Method and apparatus for evaluating structural weakness in polymer matrix composites  

DOE Patents (OSTI)

A method and apparatus for evaluating structural weaknesses in polymer matrix composites is described. An object to be studied is illuminated with laser radiation and fluorescence emanating therefrom is collected and filtered. The fluorescence is then imaged and the image is studied to determine fluorescence intensity over the surface of the object being studied and the wavelength of maximum fluorescent intensity. Such images provide a map of the structural integrity of the part being studied and weaknesses, particularly weaknesses created by exposure of the object to heat, are readily visible in the image.

Wachter, Eric A. (Oak Ridge, TN); Fisher, Walter G. (Knoxville, TN)

1996-01-01T23:59:59.000Z

287

Calibration Technique for Superfluid 4He Weak-Link Cells Based on the Fountain Effect  

Science Conference Proceedings (OSTI)

Studies of superfluid 4He weak-links require calibration constants which permit the determination of the pressure and temperature differences which drive Josephson oscillations. We describe a technique for calibrating 4He weak-link cells in which a heater is used to induce fountain pressures detected by the deflection of a diaphragm. The technique determines the diaphragm spring constant, the inner cell volume, and the thermal conductance of the inner cells walls. This information is used to convert the measured deflection of the diaphragm into the total chemical potential difference across the weak link.

Hoskinson, E.; Packard, R. E. [Department of Physics, University of California, Berkeley, CA 94720 (United States)

2006-09-07T23:59:59.000Z

288

[Theory of elementary particles studies in weak interaction and grand unification and studies in accelerator design]. Progress report  

Science Conference Proceedings (OSTI)

This report discusses research on: Stanford linear collider detector; Mark II; GEM; tau-charm factory; and SECC preradiator prototype and beam test. (LSP)

Not Available

1991-12-31T23:59:59.000Z

289

TEC Working Group Topic Groups Archives Training - Medical Training...  

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

Meeting Summaries TEC Working Group Topic Groups Archives Training - Medical Training Meeting Summaries Meeting Summaries Philadelphia TEC Meeting, Topic Group Summary - July 1999...

290

TEC Working Group Topic Groups Rail Conference Call Summaries...  

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

TEC Working Group Topic Groups Rail Conference Call Summaries CONFERENCE CALL SUMMARIES Rail Topic Group Inspections Subgroup Planning Subgroup Tracking Subgroup TRAGIS Subgroup...

291

TEC Working Group Topic Groups Rail Conference Call Summaries...  

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

TRAGIS Subgroup TEC Working Group Topic Groups Rail Conference Call Summaries TRAGIS Subgroup TRAGIS Subgroup April 11, 2006 More Documents & Publications TEC Working Group Topic...

292

TEC Working Group Topic Groups Rail Key Documents Intermodal...  

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

Intermodal Subgroup TEC Working Group Topic Groups Rail Key Documents Intermodal Subgroup Intermodal Subgroup Draft Work Plan More Documents & Publications TEC Working Group Topic...

293

The China Energy Group  

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

5 5 The China Energy Group A city-owned cogeneration plant, built in 1989 in Weihai, Shandong, received an award from the Chinese government as an advanced energy-efficient enterprise. The Energy Analysis Program's China Energy Group-a core team of four Mandarin-speaking U.S. and Chinese researchers, plus leader Mark Levine and a dozen other staff members-has worked closely with energy policymakers in China for nearly a decade. Their goal is to better understand the dynamics of energy use in China and to develop and enhance the capabilities of institutions that promote energy efficiency in that country. This unique collaboration began as a joint effort with the Energy Research Institute of China's State Planning Commission, but the Group's network has expanded to

294

DOE STGWG Group  

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

STGWG Group STGWG Group The State and Tribal Government Working Group (STGWG) is one of the intergovernmental organizations with which the DOE EM office works with. They meet twice yearly for updates to the EM projects. They were formed in 1989. It is comprised of several state legislators and tribal staff and leadership from states in proximity to DOE's environmental cleanup sites of the following states: New York, South Carolina, Ohio, Washington, New Mexico, Idaho, California, Colorado, Georgia, Illinois, Kentucky, Missouri, Nevada, Oregon, Tennessee and Texas. The tribal membership is composed of the Confederated Tribes of the Umatilla Indian Reservation, the Isleta Pueblo, Jemez Pueblo, Navajo Nation, Nez Perce Tribe, Santa Clara Pueblo, Pueblo de San Ildefonso, Seneca Nation of Indians, Shoshone-Bannock Tribes, and the

295

LBNL Community Advisory Group  

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

Organizing Framework Organizing Framework CAG Organizing Framework The Community Advisory Group Organizing Framework is composed of three primary components: CAG Purpose and Charge CAG Member Responsibilities Operating Principles CAG Membership and Participation Download a pdf of the CAG Organizing Framework. Purpose and Charge The purpose of the LBNL Community Advisory Group (CAG) is to provide input into the Lab's physical plans and development projects. The specific charge to this group is to: Advise LBNL staff on issues related to the environmental impacts of proposed planning and development projects; Articulate key community planning and design principles to be considered in the review of individual projects as well as to guide the physical development of LBNL overall; Identify recommended strategies and actions for addressing community

296

Vertical Velocity Focus Group  

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

Velocity Focus Group Velocity Focus Group ARM 2008 Science Team Meeting Norfolk, VA March 10-14 Background Vertical velocity measurements have been at the top of the priority list of the cloud modeling community for some time. Doppler measurements from ARM profiling radars operating at 915-MHz, 35-GHz and 94-GHz have been largely unexploited. The purpose of this new focus group is to develop vertical velocity ARM products suitable for modelers. ARM response to their request has been slow. Most ARM instruments are suitable for cloud observations and have limited capabilities in precipitation Using ARM datasets for evaluating and improving cloud parameterization in global climate models (GCMs) is not straightforward, due to gigantic scale mismatches. Consider this... Looking only vertically drastically limits opportunities

297

Lighting Group: Overview  

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

Overview Overview Overview of the Lighting Research Group The Lighting Research Group at Lawrence Berkeley National Laboratory performs research aimed at improving the energy efficiency of lighting systems in buildings and homes, throughout the State of California and across the Nation. The goal is to reduce lighting energy consumption by 50% over twenty years by improving the efficiency of light sources, and controlling and delivering illumination so that it is available, where and when needed, and at the required intensity. Research in the Lighting Group falls into three main areas: Sources and Ballasts, Light Distribution Systems and Controls and Communications. Click on a link below for more information about each of these research areas. Sources and Ballasts investigates next generation light sources, such as

298

Specific Group Hardware  

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

Specific Group Hardware Specific Group Hardware Specific Group Hardware ALICE palicevo1 The Virtual Organization (VO) server. Serves as gatekeeper for ALICE jobs. It's duties include getting assignments from ALICE file catalog (at CERN), submitting jobs to pdsfgrid (via condor) which submits jobs to the compute nodes, monitoring the cluster work load, and uploading job information to ALICE file catalog. It is monitored with MonALISA (the monitoring page is here). It's made up of 2 Intel Xeon E5520 processors each with 4 cores (16 virtual cores with hyperthreading). The total local disk space is 1.9 TB. It is running Scientific Linux SL release 5.5 (Boron) and is disk booted. It is in rack 17. palicevo2 The Virtual Organization (VO) server testbed. It's a Dell PowerEdge R410 with 2 Intel Xeon E5520 processors, each with 4 cores (16 virtual cores

299

Illinois Wind Workers Group  

Science Conference Proceedings (OSTI)

The Illinois Wind Working Group (IWWG) was founded in 2006 with about 15 members. It has grown to over 200 members today representing all aspects of the wind industry across the State of Illinois. In 2008, the IWWG developed a strategic plan to give direction to the group and its activities. The strategic plan identifies ways to address critical market barriers to the further penetration of wind. The key to addressing these market barriers is public education and outreach. Since Illinois has a restructured electricity market, utilities no longer have a strong control over the addition of new capacity within the state. Instead, market acceptance depends on willing landowners to lease land and willing county officials to site wind farms. Many times these groups are uninformed about the benefits of wind energy and unfamiliar with the process. Therefore, many of the project objectives focus on conferences, forum, databases and research that will allow these stakeholders to make well-educated decisions.

David G. Loomis

2012-05-28T23:59:59.000Z

300

Upgraded Coal Interest Group  

Science Conference Proceedings (OSTI)

The Upgraded Coal Interest Group (UCIG) is an EPRI 'users group' that focuses on clean, low-cost options for coal-based power generation. The UCIG covers topics that involve (1) pre-combustion processes, (2) co-firing systems and fuels, and (3) reburn using coal-derived or biomass-derived fuels. The UCIG mission is to preserve and expand the economic use of coal for energy. By reducing the fuel costs and environmental impacts of coal-fired power generation, existing units become more cost effective and thus new units utilizing advanced combustion technologies are more likely to be coal-fired.

Evan Hughes

2009-01-08T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Bell, group and tangle  

SciTech Connect

The 'Bell' of the title refers to bipartite Bell states, and their extensions to, for example, tripartite systems. The 'Group' of the title is the Braid Group in its various representations; while 'Tangle' refers to the property of entanglement which is present in both of these scenarios. The objective of this note is to explore the relation between Quantum Entanglement and Topological Links, and to show that the use of the language of entanglement in both cases is more than one of linguistic analogy.

Solomon, A. I., E-mail: a.i.solomon@open.ac.u [Open University, Department of Physics (United Kingdom)

2010-03-15T23:59:59.000Z

302

WEAK HARD X-RAY EMISSION FROM TWO BROAD ABSORPTION LINE QUASARS OBSERVED WITH NuSTAR: COMPTON-THICK ABSORPTION OR INTRINSIC X-RAY WEAKNESS?  

SciTech Connect

We present Nuclear Spectroscopic Telescope Array (NuSTAR) hard X-ray observations of two X-ray weak broad absorption line (BAL) quasars, PG 1004+130 (radio loud) and PG 1700+518 (radio quiet). Many BAL quasars appear X-ray weak, probably due to absorption by the shielding gas between the nucleus and the accretion-disk wind. The two targets are among the optically brightest BAL quasars, yet they are known to be significantly X-ray weak at rest-frame 2-10 keV (16-120 times fainter than typical quasars). We would expect to obtain Almost-Equal-To 400-600 hard X-ray ({approx}> 10 keV) photons with NuSTAR, provided that these photons are not significantly absorbed (N{sub H} {approx}< 10{sup 24} cm{sup -2}). However, both BAL quasars are only detected in the softer NuSTAR bands (e.g., 4-20 keV) but not in its harder bands (e.g., 20-30 keV), suggesting that either the shielding gas is highly Compton-thick or the two targets are intrinsically X-ray weak. We constrain the column densities for both to be N{sub H} Almost-Equal-To 7 Multiplication-Sign 10{sup 24} cm{sup -2} if the weak hard X-ray emission is caused by obscuration from the shielding gas. We discuss a few possibilities for how PG 1004+130 could have Compton-thick shielding gas without strong Fe K{alpha} line emission; dilution from jet-linked X-ray emission is one likely explanation. We also discuss the intrinsic X-ray weakness scenario based on a coronal-quenching model relevant to the shielding gas and disk wind of BAL quasars. Motivated by our NuSTAR results, we perform a Chandra stacking analysis with the Large Bright Quasar Survey BAL quasar sample and place statistical constraints upon the fraction of intrinsically X-ray weak BAL quasars; this fraction is likely 17%-40%.

Luo, B.; Brandt, W. N. [Department of Astronomy and Astrophysics, 525 Davey Lab, The Pennsylvania State University, University Park, PA 16802 (United States); Alexander, D. M.; Hickox, R. [Department of Physics, Durham University, South Road, Durham DH1 3LE (United Kingdom); Harrison, F. A.; Fuerst, F.; Grefenstette, B. W.; Madsen, K. K. [Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125 (United States); Stern, D. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States); Bauer, F. E. [Departamento de Astronomia y Astrofisica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago 22 (Chile); Boggs, S. E.; Craig, W. W. [Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States); Christensen, F. E. [DTU Space-National Space Institute, Technical University of Denmark, Elektrovej 327, DK-2800 Lyngby (Denmark); Comastri, A. [INAF-Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna (Italy); Fabian, A. C. [Institute of Astronomy, Madingley Road, Cambridge CB3 0HA (United Kingdom); Farrah, D. [Department of Physics, Virginia Tech, Blacksburg, VA 24061 (United States); Fiore, F. [Osservatorio Astronomico di Roma, via Frascati 33, I-00040 Monteporzio Catone (Italy); Hailey, C. J. [Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027 (United States); Matt, G. [Dipartimento di Matematica e Fisica, Universita degli Studi Roma Tre, via della Vasca Navale 84, I-00146 Roma (Italy); Ogle, P. [IPAC, California Institute of Technology, Mail Code 220-6, Pasadena, CA 91125 (United States); and others

2013-08-01T23:59:59.000Z

303

Group Nearest Neighbor Queries  

Science Conference Proceedings (OSTI)

Given two sets of points P and Q, a group nearest neighbor(GNN) query retrieves the point(s) of P with the smallestsum of distances to all points in Q. Consider, for instance,three users at locations q1, q2 and q3 that want to find a meeting point (e.g., ...

Dimitris Papadias; Qiongmao Shen; Yufei Tao; Kyriakos Mouratidis

2004-03-01T23:59:59.000Z

304

BCDA Group Information  

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

Dohn Arms 2-0272 - 401B1161 9:00AM - 5:30PM EPICS application development and support, CAT contact Marianne Binetti 2-5023 - 401C1239-C 8:30AM - 5:00PM Group Secretary Jeff...

305

V-234: EMC RSA Archer GRC Open Redirection Weakness and Security Bypass  

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

4: EMC RSA Archer GRC Open Redirection Weakness and Security 4: EMC RSA Archer GRC Open Redirection Weakness and Security Bypass Security Issue V-234: EMC RSA Archer GRC Open Redirection Weakness and Security Bypass Security Issue September 4, 2013 - 6:00am Addthis PROBLEM: A weakness and a security issue have been reported in EMC RSA Archer GRC PLATFORM: EMC RSA Archer GRC 5.x ABSTRACT: This fixes multiple vulnerabilities, which can be exploited to bypass certain security restrictions and to conduct spoofing attacks REFERENCE LINKS: Secunia Advisory SA54717 SecurityTracker Alert ID 1028971 EMC Identifier: ESA-2013-057 CVE-2013-3276 CVE-2013-3277 IMPACT ASSESSMENT: Medium DISCUSSION: 1) The application does not properly restrict deactivated users. This can be exploited by deactivated users to login and gain access to otherwise

306

Microphysical Characteristics of a Well-Developed Weak Echo Region in a High Plains Supercell Thunderstorm  

Science Conference Proceedings (OSTI)

Microphysical measurements in and near the weak echo region of a supercell thunderstorm are discussed. The observations were made in southeastern Montana with an armored T-28 aircraft, which has the capability to measure hydrometeors over almost ...

Dennis J. Musil; Andrew J. Heymsfield; Paul L. Smith

1986-07-01T23:59:59.000Z

307

On death ground : why weak states resist great powers explaining coercion failure in asymmetric interstate conflict  

E-Print Network (OSTI)

Great Powers often adopt coercive strategies, threatening or using limited force to convince weak states to comply with their demands. While coercive strategies have succeeded in just over half of asymmetric crises since ...

Haun, Phil M

2010-01-01T23:59:59.000Z

308

Process for loading weak-acid ion exchange resin with uranium  

DOE Patents (OSTI)

A method for loading ion exchange resins is described. The process comprises contacting a weak acid cation exchange resin in the ammonium form with a uranyl fluoride salt solution.

Notz, Karl J. (Oak Ridge, TN)

1976-01-01T23:59:59.000Z

309

A Case Study of Heavy Rainfall Associated with Weak Cyclogenesis in the Northwest Gulf of Mexico  

Science Conference Proceedings (OSTI)

This paper describes a case of unexpected weak cyclogenesis over the northwestern Gulf of Mexico from 16 to 19 September 1984 based upon manually prepared and European Centre for Medium-Range Weather Forecasts (ECMWF) gridded analyses. Noteworthy ...

Lance F. Bosart; Chung-Chieng Lai; Robert A. Weisman

1992-11-01T23:59:59.000Z

310

Simulation of Coherent Doppler Lidar Performance in the Weak-Signal Regime  

Science Conference Proceedings (OSTI)

The performance of coherent Doppler lidar in the weak-signal regime is investigated by computer simulations of velocity estimators that accumulate the signal from N pulses of zero-mean complex Gaussian stationary lidar data described by a ...

Rod Frehlich

1996-06-01T23:59:59.000Z

311

Residual Sediment Fluxes in Weakly-to-Periodically Stratified Estuaries and Tidal Inlets  

Science Conference Proceedings (OSTI)

In this idealized numerical modeling study, the composition of residual sediment fluxes in energetic (e.g., weakly or periodically stratified) tidal estuaries is investigated by means of one-dimensional water column models, with some focus on the ...

Hans Burchard; Henk M. Schuttelaars; W. Rockwell Geyer

2013-09-01T23:59:59.000Z

312

Study of Radiative and Turbulent Processes in the Stable Boundary Layer under Weak Wind Conditions  

Science Conference Proceedings (OSTI)

The role of radiation and turbulence was studied in a weak wind nocturnal inversion layer using a one-dimensional model. In contrast to a strong wind stable boundary layer where cooling within the surface inversion layer is dominated by ...

S. G. Gopalakrishnan; Maithili Sharan; R. T. McNider; M. P. Singh

1998-03-01T23:59:59.000Z

313

On the maintenance of weak meridional temperature gradients during warm climates  

E-Print Network (OSTI)

This thesis examines the dynamics of equable climates. The underlying physics of two mechanisms by which weak meridional temperature gradients might be maintained are studied. First, I examine the evolution of stratospheric ...

Korty, Robert Lindsay

2005-01-01T23:59:59.000Z

314

Reorganization of Tropical Climate during El Niño: A Weak Temperature Gradient Approach  

Science Conference Proceedings (OSTI)

The applicability of a weak temperature gradient (WTG) formulation for the reorganization of tropical climate during El Niño–Southern Oscillation (ENSO) events is investigated. This idealized dynamical framework solves for the divergent portion ...

Benjamin R. Lintner; John C. H. Chiang

2005-12-01T23:59:59.000Z

315

Empirical Orthogonal Function Analysis of the Weakly Convective Atmospheric Boundary Layer. Part I: Eddy Structures  

Science Conference Proceedings (OSTI)

Three-dimensional empirical orthogonal functions (EOFs), representing atmospheric turbulence structures, are determined from a large-eddy simulation of a weakly convective, planetary boundary layer. The method of analysis is based on Lumley's ...

D. Keith Wilson

1996-03-01T23:59:59.000Z

316

Kinematic, Dynamic, and Thermodynamic Analysis of a Weakly Sheared Severe Thunderstorm over Northern Alabama  

Science Conference Proceedings (OSTI)

A kinematic, dynamic, and thermodynamic analysis of a weakly sheared, airmass thunderstorm observed over northern Alabama is presented. Most notable is the fact that the dominant cell in this storm closely resembles the Byers and Braham model for ...

David E. Kingsmill; Roger M. Wakimoto

1991-02-01T23:59:59.000Z

317

Residual Currents Induced by Asymmetric Tidal Mixing in Weakly Stratified Narrow Estuaries  

Science Conference Proceedings (OSTI)

Residual currents induced by asymmetric tidal mixing were examined for weakly stratified, narrow estuaries using analytical and numerical models. The analytical model is an extension of the work of R. K. McCarthy, with the addition of tidal ...

Peng Cheng; Arnoldo Valle-Levinson; Huib E. de Swart

2010-09-01T23:59:59.000Z

318

Mean Structure of the Nocturnal Boundary Layer under Strong and Weak Wind Conditions: EPRI Case Study  

Science Conference Proceedings (OSTI)

The major objective of this study was to analyze the mean structure and evolution of the nocturnal boundary layer (NBL) under strong and weak wind conditions. Meteorological data collected during the plume-validation experiment conducted by the ...

T. B. P. S. Rama V. Krishna; Maithili Sharan; S. G. Gopalakrishnan; Aditi

2003-07-01T23:59:59.000Z

319

Modeling and Parameterization of Near-Source Diffusion in Weak Winds  

Science Conference Proceedings (OSTI)

A critical assessment is made of several different approaches that can be used for modeling near-source diffusion in weak winds, including the calm condition. For the convective boundary layer, the statistical theory approach is used in ...

S. Pal Arya

1995-05-01T23:59:59.000Z

320

A Simple Model of a Convectively Coupled Walker Circulation Using the Weak Temperature Gradient Approximation  

Science Conference Proceedings (OSTI)

An idealized model of a Walker circulation based on the weak temperature gradient (WTG) approximation and a single baroclinic vertical mode for all fields is analyzed. The circulation is forced by a sinusoidal variation of sea surface temperature ...

Christopher S. Bretherton; Adam H. Sobel

2002-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Residual Sediment Fluxes in Weakly-to-Periodically Stratified Estuaries and Tidal Inlets  

Science Conference Proceedings (OSTI)

In this idealized numerical modeling study, the composition of residual sediment fluxes in energetic (e.g., weakly stratified or periodically stratified) tidal estuaries is investigated by means of one-dimensional water column models, with some ...

Hans Burchard; Henk M. Schuttelaars; W. Rockwell Geyer

322

Sinocome Group | Open Energy Information  

Open Energy Info (EERE)

Sinocome Group Place Beijing Municipality, China Sector Solar Product A Chinese high tech group with business in solar PV sector References Sinocome Group1 LinkedIn Connections...

323

Gravity Waves in a Horizontal Shear Flow. Part II: Interaction between Gravity Waves and Potential Vorticity Perturbations  

Science Conference Proceedings (OSTI)

Interaction among potential vorticity perturbations and propagating internal gravity waves in a horizontally sheared zonal flow is investigated. In the strong stratification limit, an initial vorticity perturbation weakly excites two propagating ...

Nikolaos A. Bakas; Brian F. Farrell

2009-03-01T23:59:59.000Z

324

UMBC Research Group Update  

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

balloon-borne balloon-borne aerosol profiling system: Applications in China Zahra Chaudhry, J. Vanderlei Martins, Zhanqing Li, Si-Chee Tsay, Qiang Ji, Tianxue Wen, Wu Zhang DOE ARM Science Team Meeting April 2 nd , 2009 Outline * Briefly discuss why we built this instrument * Show schematics of instrument design * Validation via Intercomparison * Experimental Plan * Results Motivation * Aerosol optical and physical properties are highly variable both in time and space, and more accurate information is needed. * Aerosols form mixtures as different types interact. These mixtures take on different optical properties than those of the originating species. * Current commercially-available instruments for optical property measurements have inherent biases and involve considerable corrections

325

Group Vision Care Policy  

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

Vision Vision Care Policy Group Name: LOS ALAMOS NATIONAL SECURITY, LLC. RETIREES Group Number: 12284390 Divisions 0005 & 0006 Effective Date: JANUARY 1, 2011 EVIDENCE OF COVERAGE Provided by: VISION SERVICE PLAN INSURANCE COMPANY 3333 Quality Drive, Rancho Cordova, CA 95670 (916) 851-5000 (800) 877-7195 EOC NM 03/02 11/25/08 CLD In addition to the information contained in this Benefit Program Summary, the LANS Health & Welfare Benefit Plan for Retirees Summary Plan Description contains important information about your LANS health and welfare benefits. For additional information: For Retirees: Customer Care Center (866) 934-1200 www.ybr.com/benefits/lanl LANL Benefits Website for Retirees: http://www.lanl.gov/worklife/benefits/retirees/

326

Fermilab Steering Group Report  

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

Fermilab Icon Fermilab Icon Photo Home About About the Steering Group Members & Contributors Fermilab and the Quantum Universe Acknowledgement Contents Contents Chapter 1 Executive Summary: A Plan for Fermilab Chapter 2 Fermilab and the Quantum Universe Chapter 3 Fermilab and the ILC Chapter 4 Physics at the Intensity Frontier Chapter 5 Facilities for the Intensity Frontier Chapter 6 Beyond the ILC and the LHC Chapter 7 A Fermilab Plan for Discovery Appendix Appendix Appendix Appendix A Steering Group charge Appendix B Fermilab and the ILC Appendix C The international neutrino program Appendix D Neutrino science with 8 GeV and 800 GeV protons Appendix E Muon-to-electron conversion in nuclei Appendix F Precision physics experiments with kaon beams Appendix G Facilities considered Appendix H Steps toward a muon collider

327

NERSC User Group Meeting  

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

NERSC User Group Meeting NERSC User Group Meeting Oct 18, 2010 Outline * About OpenMP * Parallel Regions * Worksharing Constructs * Synchronization * Data Scope * Tasks * Using OpenMP at NERSC 2 3 Common Architectures * Shared Memory Architecture - Multiple CPUs share global memory, could have local cache - Uniform Memory Access (UMA) - Typical Shared Memory Programming Model: OpenMP, Pthreads, ... * Distributed Memory Architecture - Each CPU has own memory - Non-Uniform Memory Access (NUMA) - Typical Message Passing Programming Model: MPI, ... * Hybrid Architecture - UMA within one SMP node - NUMA across nodes - Typical Hybrid Programming Model: mixed MPI/OpenMP, ... What is OpenMP * OpenMP is an industry standard API of C/C++ and Fortran for shared memory parallel programming.

328

AEC GROUP SHELTER  

SciTech Connect

As a result of atomic shelter tests and field experiments condueted over the past nine years, it has been conclusively shown that shelters provide the only promising means of civilian protection in the event of a nuclear war. Design details are presented for a group shelter to accommodate 100 persons of all age groups and both sexes. The shelter structure is a multiplate corrugated- steel arch set on a concrete slab with end walls of bridge plate sheathing. The entire structure is covered with a minimum of 3 feet of earth. The shelter combines outstanding protection against radioactive fall-out with good protection against blast and thermal radiation. Drawings are included. General operating procedures are outlined. (C.H.)

1960-01-01T23:59:59.000Z

329

Nanomaterials Chemistry Group - CSD  

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

CSD CSD Organization Contact List Search Other Links CSD CSD Organization Contact List Search Other Links Selected Research and Development Projects The Nanomaterials Chemistry Group at Chemical Sciences Division, the Oak Ridge National Laboratory conducts fundamental research related to synthesis and characterization of nanoscopic materials as well as ionic liquids for fundamental investigation of separation and catalysis processes. This group also conducts the applied research related to the applications of nanomaterials in advanced scintillators for radiation sensing, catalysts for fuel cells, radioactive tracers for medical imaging, novel electrodes for energy storage, and sensing devices for biological agents. Extensive synthesis capabilities exist within the group for preparation of mesoporous materials (oxides and carbons), low-dimensional materials (e.g., quantum dots and nanowires), sol-gel materials, inorganic and hybrid monoliths (e.g., membranes), and nanocatalysts. Solvothermal, ionothermal, templating synthesis, chemical vapor deposition (CVD), and atomic layer deposition (ALD) methods are extensively utilized in the group for tailored synthesis of nanostructured materials. An array of techniques for characterizing physical and chemical properties related to separation and catalysis are in place or are currently being developed. This research program also takes advantage of the unique resources at ORNL such as small-angle x-ray scattering, small-angle neutron scattering at the High Flux Isotope Reactor and Spallation Neutron Source (SNS), structural analysis by a variety of electron microscopes (SEM, TEM, STEM, HRTEM) and powdered X-ray diffraction (XRD) techniques. A wide variety of other facilities for routine and novel techniques are also utilized including the Center for Nanophase Materials Science. Computational chemistry tools are employed to understand experimental results related to separation and other interfacial chemical processes and design better nanomaterials and ionic liquids. Commonly used methods include first principles density functional theory (DFT) and mixed quantum mechanical/molecular mechanical (QM/MM) techniques.

330

CHA Guidelines Working Group  

E-Print Network (OSTI)

The Community Health Assessment Guidelines have been updated from the original document published in 1997. The revisions reflect various published sources, as well as accumulated experience with community health assessment within the province of Manitoba. Special thanks to the members of the CHA Guidelines Working Group, composed of representatives of regional health authorities from across the province and Manitoba Health and Healthy Living staff. These guidelines are made

Jody Allan; Sonia Busca Owczar; Ingrid Botting; Maggie Campbell; Bunmi Fatoye; Bill Funk; Tannis Erickson; Sue Lockhart; Ales Morga; Deborah Malazdrewicz; Leonie Stranc

2009-01-01T23:59:59.000Z

331

Cell Systems Science Group Staff  

Science Conference Proceedings (OSTI)

*. Bookmark and Share. Members of the Cell Systems Science Group. Dr. John T. Elliott (Group Leader). Dr. Donald H. Atha ...

2013-03-12T23:59:59.000Z

332

X-ray Science Division: Groups  

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

Division: Groups Division: Groups Atomic, Molecular and Optical Physics (AMO) Primary Contact: Stephen Southworth Work focuses on understanding how strong optical and x-ray fields interact with matter, with an emphasis on photonic control of electronic, atomic and molecular motion. Chemical and Materials Science (CMS) Primary Contact: Randy Winans Research Disciplines: Chemistry, Materials Science Detectors (DET) Primary Contact: Antonino Miceli GMCA Structural Biology Facility (MX) Primary Contact: Robert Fischetti Research Disciplines: Biology, Life Sciences Imaging (IMG) Primary Contact: Francesco DeCarlo Research Disciplines: Materials Science, Biology, Physics, Life Sciences Inelastic X-ray & Nuclear Resonant Scattering (IXN) Primary Contact: Thomas Gog Research Disciplines: Condensed Matter Physics, Geophysics, Materials

333

Brunnian subgroups of mapping class groups and braid groups  

E-Print Network (OSTI)

In this paper we continue our study of the Delta-group structure on the braid groups and mapping class groups of a surface. We calculate the homotopy groups of these Delta-groups and prove some results about Brunnian braid groups and Brunnian mapping class groups. This is the second of a pair of papers on these structures. 1 Introduction and statement of results In this paper we study the sequences

A. J. Berrick; E. Hanbury; J. Wu

2010-01-01T23:59:59.000Z

334

A framework for supporting joint interpersonal attention in distributed groups  

Science Conference Proceedings (OSTI)

Informal interactions are a key element of workgroup communication, but have proven difficult to support in distributed groups. One reason for this is that existing systems have focused either on novel means for gathering information about the availability ... Keywords: CMC, CSCW, attention, awareness, interaction

Jeremy Birnholtz; Johnathon Schultz; Matthew Lepage; Carl Gutwin

2011-09-01T23:59:59.000Z

335

TEC Working Group Topic Groups Rail Meeting Summaries | Department of  

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

Rail Meeting Summaries Rail Meeting Summaries TEC Working Group Topic Groups Rail Meeting Summaries MEETING SUMMARIES Kansas City TEC Meeting, Rail Topic Group Summary - July 25, 2007 Atlanta TEC Meeting, Rail Topic Group Summary - March 6, 2007 Green Bay Meeting, Rail Topic Group Summary - October 26, 2006 Washington DC TEC Meeting, Rail Topic Group Summary - March 15, 2006 Pueblo TEC Meeting, Rail Topic Group Summary - September 22, 2005 Phoenix TEC Meeting, Rail Topic Group Summary - April 4, 2005 Minneapolis TEC Meeting, Rail Topic Group Summary - September 21, 2004 Albuquerque TEC Meeting, Rail Topic Group Summary - April 22, 2004 New Orleans TEC Meeting, Rail Topic Group Summary - January 29, 2002 Jacksonville TEC Meeting, Rail Topic Group Summary - January 20, 1999 Milwaukee TEC Meeting, Rail Topic Group Summary - July 13, 1998

336

Advanced Concepts Breakout Group  

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

Workshop Workshop Advanced Concepts Working Group Facilitator: John J. Petrovic Scribe: Sherry Marin Advanced Storage Techniques/ Approaches in Priority Order 1. Crystalline Nanoporous Materials (15) 2. Polymer Microspheres (12) Self-Assembled Nanocomposites (12) 3. Advanced Hydrides (11) Metals - Organic (11) 4. BN Nanotubes (5) Hydrogenated Amorphous Carbon (5) 5. Mesoporous materials (4) Bulk Amorphous Materials (BAMs) (4) 6. Iron Hydrolysis (3) 7. Nanosize powders (2) 8. Metallic Hydrogen (1) Hydride Alcoholysis (1) Overarching R&D Questions for All Advanced Materials * Maximum storage capacity - theoretical model * Energy balance / life cycle analysis * Hydrogen absorption / desorption kinetics * Preliminary cost analysis - potential for low cost, high

337

SPPR Group Proposal  

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

Proposal Proposal June 23, 2010 Agenda Purpose of Meeting Presenters Background Information  Three Terminal Plan & Market Access  Business Case  Transmission Infrastructure Program ED5-Palo Verde Project Potential Rate Impacts Discussion / Comments 2 Purpose of Meeting Provide background information Share the SPPR Group's current proposal and how it might affect Parker-Davis Project (P-DP) customers Obtain your feedback on the proposal 3 Presenters Background Information - Todd Rhoades ED5-PV Project Description - Todd Rhoades Project Marketability - John Steward Project Cost & Financing - Jack Murray Potential Rate Impacts - Jack Murray Next Steps - Todd Rhoades 4 Three Terminal Plan November 2009 5 Business Case

338

Renormalization group functional equations  

SciTech Connect

Functional conjugation methods are used to analyze the global structure of various renormalization group trajectories and to gain insight into the interplay between continuous and discrete rescaling. With minimal assumptions, the methods produce continuous flows from step-scaling {sigma} functions and lead to exact functional relations for the local flow {beta} functions, whose solutions may have novel, exotic features, including multiple branches. As a result, fixed points of {sigma} are sometimes not true fixed points under continuous changes in scale and zeroes of {beta} do not necessarily signal fixed points of the flow but instead may only indicate turning points of the trajectories.

Curtright, Thomas L. [CERN, CH-1211 Geneva 23 (Switzerland); Department of Physics, University of Miami, Coral Gables, Florida 33124-8046 (United States); Zachos, Cosmas K. [High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4815 (United States)

2011-03-15T23:59:59.000Z

339

Renormalization group functional equations.  

SciTech Connect

Functional conjugation methods are used to analyze the global structure of various renormalization group trajectories and to gain insight into the interplay between continuous and discrete rescaling. With minimal assumptions, the methods produce continuous flows from step-scaling {sigma} functions and lead to exact functional relations for the local flow {beta} functions, whose solutions may have novel, exotic features, including multiple branches. As a result, fixed points of {sigma} are sometimes not true fixed points under continuous changes in scale and zeroes of {beta} do not necessarily signal fixed points of the flow but instead may only indicate turning points of the trajectories.

Curtright, T. L.; Zachos, C. K. (High Energy Physics); (Univ. of Miami)

2011-03-16T23:59:59.000Z

340

Chemical Safety Vulnerability Working Group report. Volume 1  

Science Conference Proceedings (OSTI)

The Chemical Safety Vulnerability (CSV) Working Group was established to identify adverse conditions involving hazardous chemicals at DOE facilities that might result in fires or explosions, release of hazardous chemicals to the environment, or exposure of workers or the public to chemicals. A CSV Review was conducted in 148 facilities at 29 sites. Eight generic vulnerabilities were documented related to: abandoned chemicals and chemical residuals; past chemical spills and ground releases; characterization of legacy chemicals and wastes; disposition of legacy chemicals; storage facilities and conditions; condition of facilities and support systems; unanalyzed and unaddressed hazards; and inventory control and tracking. Weaknesses in five programmatic areas were also identified related to: management commitment and planning; chemical safety management programs; aging facilities that continue to operate; nonoperating facilities awaiting deactivation; and resource allocations. Volume 1 contains the Executive summary; Introduction; Summary of vulnerabilities; Management systems weaknesses; Commendable practices; Summary of management response plan; Conclusions; and a Glossary of chemical terms.

Not Available

1994-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Lighting Group: People  

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

People People Lighting Group Staff Phone Mailstop Email Group Leader [area code 510] Rubinstein, Francis 486-4096 90R3111 FMRubinstein@lbl.gov Staff Scientists Berman, Sam 5682 90R3111 Clear, Robert 486-4286 90R3111 RDClear@lbl.gov Research Associates Enscoe, Abby (510) 486 6077 90R3111 AIEnscoe@lbl.gov Fritz, Randolph M. (510) 495 2532 90R3111 RFritz@lbl.gov Ghatikar, Girish 486-6768 90R3111 GGhatikar@lbl.gov Granderson, Jessica 486-7692 90R3111 JGranderson@lbl.gov Howells, Jack 4096 46R0125 MRHowells@lbl.gov Kiliccote, Sila 495-2615 90R3111 SKiliccote@lbl.gov Liu, Gao 7207 70R0108B GLiu@lbl.gov Wen, Yao-Jung 4702 90R3111 YJWen@lbl.gov Yazdanian, Mehry 486-4701 90R3111 MYazdanian@lbl.gov Research Technicians Galvin, James 486-4661 47R0112 JEGalvin@lbl.gov Technical Support DiBartolomeo, Dennis 486-4702 90R3111

342

TEC Working Group Topic Groups Tribal Meeting Summaries | Department of  

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

Meeting Summaries Meeting Summaries TEC Working Group Topic Groups Tribal Meeting Summaries Meeting Summaries Kansas City TEC Meeting - Tribal Group Summary - July 25, 2007 Atlanta TEC Meeting - Tribal Group Summary - March 6, 2007 Green Bay TEC Meeting -- Tribal Group Summary - October 26, 2006 Washington TEC Meeting - Tribal Topic Group Summary - March 14, 2006 Pueblo TEC Meeting - Tribal Topic Group Summary, September 22, 2005 Phoenix TEC Meeting - Tribal Topic Group Summary - April 4, 2005 Albuquerque TEC Meeting - Tribal Topic Group Presentation - April 21, 2004 New Orleans TEC Meeting - Tribal Topic Group Summary - January 29, 2002 Portland TEC Meeting, Tribal Topic Group Summary - February 6, 2001 Philadelphia TEC Meeting, Tribal Topic Group Summary - July 13, 1999

343

TEC Working Group Topic Groups Rail Key Documents | Department...  

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

Draft Rail Topic Group Task Plan Final Rail Topic Group Paper Strawman Report Comments Matrix 2002 Summary of the Rail Topic Group Transportation Safety WIPP-PIG Rail Comparison...

344

Weak gravitational lensing as a method to constrain unstable dark matter  

SciTech Connect

The nature of the dark matter remains a mystery. The possibility of an unstable dark matter particle decaying to invisible daughter particles has been explored many times in the past few decades. Meanwhile, weak gravitational lensing shear has gained a lot of attention as a probe of dark energy, though it was previously considered a dark matter probe. Weak lensing is a useful tool for constraining the stability of the dark matter. In the coming decade a number of large galaxy imaging surveys will be undertaken and will measure the statistics of cosmological weak lensing with unprecedented precision. Weak lensing statistics are sensitive to unstable dark matter in at least two ways. Dark matter decays alter the matter power spectrum and change the angular diameter distance-redshift relation. We show how measurements of weak lensing shear correlations may provide the most restrictive, model-independent constraints on the lifetime of unstable dark matter. Our results rely on assumptions regarding nonlinear evolution of density fluctuations in scenarios of unstable dark matter and one of our aims is to stimulate interest in theoretical work on nonlinear structure growth in unstable dark matter models.

Wang Meiyu; Zentner, Andrew R. [Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)

2010-12-15T23:59:59.000Z

345

TEC Working Group Topic Groups Rail Conference Call Summaries...  

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

Rail Conference Call Summaries Tracking Subgroup TEC Working Group Topic Groups Rail Conference Call Summaries Tracking Subgroup Tracking Subgroup March 27, 2006 March 6, 2006...

346

TEC Working Group Topic Groups Archives Training - Medical Training...  

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

Training - Medical Training Conference Call Summaries TEC Working Group Topic Groups Archives Training - Medical Training Conference Call Summaries Conference Call Summaries...

347

TEC Working Group Topic Groups Archives Mechanics of Funding...  

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

Mechanics of Funding and Techical Assistance TEC Working Group Topic Groups Archives Mechanics of Funding and Techical Assistance Mechanics of Funding and Techical Assistance Items...

348

TEC Working Group Topic Groups Rail Key Documents Planning Subgroup...  

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

Rail Key Documents Planning Subgroup TEC Working Group Topic Groups Rail Key Documents Planning Subgroup Planning Subgroup Rail Planning Timeline Benchmarking Project: AREVA Trip...

349

TEC Working Group Topic Groups Rail Conference Call Summaries...  

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

Inspections Subgroup TEC Working Group Topic Groups Rail Conference Call Summaries Inspections Subgroup Inspections Subgroup April 6, 2006 February 23, 2006 Draft January 24, 2006...

350

TEC Working Group Topic Groups Rail Conference Call Summaries...  

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

Intermodal Subgroup TEC Working Group Topic Groups Rail Conference Call Summaries Intermodal Subgroup Intermodal Subgroup July 17, 2007 September 19, 2007 December 12, 2007 More...

351

TEC Working Group Topic Groups Rail Conference Call Summaries...  

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

Planning Subgroup TEC Working Group Topic Groups Rail Conference Call Summaries Planning Subgroup Planning Subgroup March 30, 2006 February 15, 2006 Draft...

352

TEC Working Group Topic Groups Rail Key Documents Radiation Monitoring...  

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

Radiation Monitoring Subgroup TEC Working Group Topic Groups Rail Key Documents Radiation Monitoring Subgroup Radiation Monitoring Subgroup Draft Work Plan - February 4, 2008 More...

353

TEC Working Group Topic Groups Rail Conference Call Summaries...  

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

Radiation Monitoring Subgroup TEC Working Group Topic Groups Rail Conference Call Summaries Radiation Monitoring Subgroup Radiation Monitoring Subgroup October 11, 2007 More...

354

CORRELATION BETWEEN GROUP LOCAL DENSITY AND GROUP LUMINOSITY  

SciTech Connect

In this study, we investigate the correlation between group local number density and total luminosity of groups. In four volume-limited group catalogs, we can conclude that groups with high luminosity exist preferentially in high-density regions, while groups with low luminosity are located preferentially in low-density regions, and that in a volume-limited group sample with absolute magnitude limit M{sub r} = -18, the correlation between group local number density and total luminosity of groups is the weakest. These results basically are consistent with the environmental dependence of galaxy luminosity.

Deng Xinfa [School of Science, Nanchang University, Jiangxi 330031 (China); Yu Guisheng [Department of Natural Science, Nanchang Teachers College, Jiangxi 330103 (China)

2012-11-10T23:59:59.000Z

355

TEC Working Group Topic Groups Rail Archived Documents | Department...  

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

Group Topic Groups Rail Archived Documents ARCHIVED DOCUMENTS Inspections Summary Matrix TEC Transportation Safety WIPP-PIG Rail Comparison Regulatory Summary Matrix More...

356

Lighting Group: Software  

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

Software Software Lighting Software The Lighting Group has developed several computer programs in the course of conducting research on energy efficient lighting. Several of these programs have proven useful outside the research environment. One of the most popular programs for advanced lighting applications is Radiance. For more information on this program and its availability, click on the link below. RADIANCE Radiance is a suite of programs for the analysis and visualization of lighting in design. The primary advantage of Radiance over simpler lighting calculation and rendering tools is that there are no limitations on the geometry or the materials that may be simulated. Radiance is used by architects and engineers to predict illumination, visual quality and appearance of innovative design spaces, and by researchers to evaluate new

357

Fermilab Steering Group Report  

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

5 5 Facilities for the Intensity Frontier In This Section: Facilities for the Intensity Frontier SuperNuMI (SNuMI) Project X Existing rings Project X and the ILC Project X and longer term facilities Summary Facilities for the Intensity Frontier The Steering Group considered a variety of accelerator facilities and programs using the following criteria: Support for physics research goals, effective use of accelerator assets freed up at the end of Tevatron operations, Alignment with the ILC R&D program, Potential for achievement over the next decade. Twelve facilities received consideration using some or all of these criteria. Appendix G sorts those facilities not described in this chapter based on relevance to proton- or electron-based programs. This chapter describes the facilities that would support neutrino science and precision physics at the intensity frontier. The facilities include an intense proton source and its injection to the existing rings at Fermilab for a variety of programs.

358

# Energy Measuremenfs Group  

Office of Legacy Management (LM)

ri EECE ri EECE # Energy Measuremenfs Group SUMMARY REPORT . AiRIAL R4DIOLOGICAL SURVEY - NIAGARA FALLS AREA NIAGARA FALLS, NEh' YORK DATE OF SURVEY: SEPTEMBER 1979 APPROVED FOR DISTRIBUTION: P Stuart, EC&G, Inc. . . Herbirt F. Hahn, Department of Energy PERFDRflED BY EGtf, INC. UNDER CONTRACT NO. DE-AHO&76NV01163 WITH THE UNITED STATES DEPARTMENT OF ENERGY II'AFID 010 November 30, 1979 - The Aerial Measurements System (A%), operated by EC&t, Inc< for the Un i ted States Department of Energy, was used during November 1976 to conduct an exploratory aerial radiological survey in-the greater Niagara Fails area. The purpose of that survey was to identify locations having concentrations of terrestrial radioactivity not typical of the radiation

359

Particle Data Group  

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

About PDG About PDG About the PDG PDG authors Order PDG products PDG citation Encoder tools Job at LBNL Contact Us Downloads Resources Errata Archives Atomic Nuclear Properties Online HEP Info Non-PDG Databases Durham-RAL databases Current experiments Guide to Data Partial-wave analyses Contact Us News The "Reviews, Tables, Plots" section has been updated. The next book edition is due in early summer 2014, and the booklet in late summer 2014. Funded By: US DOE US NSF CERN MEXT (Japan) INFN (Italy) MEC (Spain) IHEP & RFBR (Russia) Mirrors: USA (LBNL) Brazil CERN Indonesia Italy Japan (KEK) Russia (Novosibirsk) Russia (Protvino) UK (Durham) The Review of Particle Physics J. Beringer et al. (Particle Data Group), Phys. Rev. D86, 010001 (2012) and 2013 partial update for the 2014 edition.

360

Particle Data Group - Authors  

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

6 Edition and 2007 Web Update 6 Edition and 2007 Web Update (Click on Author Name to get Email address, phone numbers, etc.) RPP authors New authors of 2007 Web Update M. Antonelli, 102 H. Baer, 64 G. Bernardi, 103 M. Carena, 51 M.-C. Chen, 11 B. Dobrescu, 51 J.-F. Grivaz, 104 T. Gutsche, 105 J. Huston, 45 T. Junk, 51 C.-J. Lin, 1 H. Mahlke, 106 P. Mohr, 107 P. Nevski, 75 S. Rolli, 108 A. Romaniouk, 109 B. Seligman, 110 M. Shaevitz, 111 B. Taylor, 107 M. Titov, 56,112 G. Weiglein, 78 A. Wheeler, 69 Authors of the 2006 Review of Particle Physics W.-M. Yao et al. (Particle Data Group), J. Phys. G 33, 1 (2006) (bibtex format) Also see: PS format or PDF format. AUTHORS OF LISTINGS AND REVIEWS: (Click on Author Name to get Email address, phone numbers, etc.) RPP authors (RPP 2006)

Note: This page contains sample records for the topic "group weak interactions" 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

Working Group Reports  

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

5 5 Working Group Reports Special Working Session on the Role of Buoy Observations in the Tropical Western Pacific Measurement Scheme J. Downing Marine Sciences Laboratory Sequim, Washington R. M. Reynolds Brookhaven National Laboratory Upton, New York Attending W. Clements (TWPPO) F. Barnes (TWPPO) T. Ackerman (TWP Site Scientist) M. Ivey (ARCS Manager) H. Church J. Curry J. del Corral B. DeRoos S. Kinne J. Mather J. Michalsky M. Miller P. Minnett B. Porch J. Sheaffer P. Webster M. Wesely K. Zorika G. Zhang Focus of Discussion The session convened on March 2, with brief introductions by Bill Clements. The purpose of the session was to discuss the scientific merits of retrofitting TOGA/TAO buoys with shortwave radiometers. Three questions were posed at the outset of the session to focus the discussion.

362

future science group  

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

61 61 ISSN 1759-7269 10.4155/BFS.11.150 © 2012 Future Science Ltd In 1950 Reese et al. proposed a mechanism for cel- lulose hydrolysis, which involved two general com- ponents, C 1 and C x , acting in sequence [1]. According to the model, the C 1 component first disrupted and swelled the crystalline cellulose, possibly releasing soluble oligo saccharides into solution. The C x compo- nent, which was shown to have endoglucanase activity, was then able to effectively hydrolyze the previously inaccessible substrate along with the soluble oligo- saccharides. Furthermore, the activity of the mixture was found to be higher than the activity of each com- ponent acting alone, indicating that the components were acting synergistically. In the following years, a number of groups began to identify and characterize

363

Particle Data Group - Authors  

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

Particle Data Group Associates and Advisors Particle Data Group Associates and Advisors Aguilar-Benitez, Amsler, Antonelli, Arguin, Armstrong, Artuso, Asner, Babu, Baer, Band, Barberio, Barnett, Battaglia, Bauer, Beringer, Bernardi, Bertl, Besson, Bichsel, Biebel, Bloch, Blucher, Blusk, Bunakov, Burchat, Cahn, Carena, Carone, Casas Serradilla, Casper, Cattai, Ceccucci, Chakraborty, Chen, Chivukula, Copic, Cousins, Cowan, Crawford, Dahl, Dalitz, D'Ambrosio, DeGouvea, DeGrand, Damour, Desler, Dissertori, Dobbs, Dobrescu, Donahue, Doser, Drees, Edwards,A, Edwards, Eidelman, Elvira, Erler, Ezhela, Fasso', Feng, Fetscher, Fields, Filimonov, Foster, Freedman, Froidevaux, Fukugita, Gaisser, Garren, Geer, Gerber, Gerbier, Gherghetta, Gibbons, Gilman, Giudice, Goldhaber, Goodman, Grab, Gritsan, Grivaz, Groom, Grünewald, Gurtu, Gutsche, Haber, Hagiwara, Hagmann, Hanhart, Harper , Hayes, Heltsley, Hernàndez-Rey, Hewett, Hikasa, Hinchliffe, Holder, Höcker, Hogan, Höhler, Holtkamp, Honscheid , Huston , Igo-Kemenes, Jackson, James, Jawahery, Johnson, Junk, Karlen, Kayser, Kirkby, Klein, Kleinknecht, Klempt, Knowles, Kolb, Kolda, Kowalewski, Kreitz, Kreps, Krusche, Kuyanov, Kwon, Lahav, Landua, Langacker , Lepage, Liddle, Ligeti, Lin, Liss, Littenberg, Liu, LoSecco, Lugovsky,K, Lugovsky,S, Lugovsky,V, Lynch, Lys, Mahlke, Mangano, Mankov, Manley, Mannel, Manohar, March-Russell, Marciano, Martin, Masoni, Matthews, Milstead, Miquel, Mönig, Mohr, Morrison, Murayama, Nakada, Nakamura, Narain, Nason, Navas, Nevski, Nicholson, Nir, Olive, Oyanagi, Pape, Patrignani, Peacock, Piepke, Porter, Prell, Punzi, Quadt, Quinn, Raby, Raffelt, Ratcliff, Razuvaev, Renk, Richardson, Roesler, Rolandi, Rolli, Romaniouk , Roos, Rosenberg, Rosner, Sachrajda, Sakai, Salam, Sanda, Sarkar, Sauli, Schaffner, Schindler, Schmitt, Schneider, Scott, Seligman, Shaevitz, Shrock, Silari, Skands, Smith, Sjöstrand, Smoot, Sokolosky, Spanier, Spieler, Spooner, Srednicki, Stahl, Stanev, Stone, Stone,S, Streitmatter, Sumiyoshi, Suzuki, Syphers, Tanabashi, Taylor, Terning, Titov, Tkachenko, Törnqvist, Tovey, Trilling, Trippe, Turner, Valencia, van Bibber, Vincter, Venanzoni, Vogel, Voss, Ward, Watari, Webber, Weiglein, Wells, Whalley, Wheeler, Wohl, Wolfenstein, Womersley, Woody, Workman, Yamamoto, Yao, Youssef, Zenin, Zhang, Zhu, Zyla

364

Fermilab Steering Group Report  

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

1 1 Executive Summary: A Plan for Fermilab In This Section: Executive Summary: A Plan for Fermilab Guidelines The Steering Group's proposed plan Executive Summary: A Plan for Fermilab The Fermilab Steering Group has developed a plan to keep U.S. accelerator-based particle physics on the pathway to discovery, both at the Terascale with the LHC and the ILC and in the domain of neutrinos and precision physics with a high-intensity accelerator. The plan puts discovering Terascale physics with the LHC and the ILC as Fermilab's highest priority. While supporting ILC development, the plan creates opportunities for exciting science at the intensity frontier. If the ILC remains near the Global Design effort's technically driven timeline, Fermilab would continue neutrino science with the NOνA experiment, using the NuMI (Neutrinos at the Main Injector) proton plan, scheduled to begin operating in 2011. If ILC construction must wait somewhat longer, Fermilab's plan proposes SNuMI, an upgrade of NuMI to create a more powerful neutrino beam. If the ILC start is postponed significantly, a central feature of the proposed Fermilab plan calls for building an intense proton facility, Project X, consisting of a linear accelerator with the currently planned characteristics of the ILC combined with Fermilab's existing Recycler Ring and the Main Injector accelerator. The major component of Project X is the linac. Cryomodules, radio-frequency distribution, cryogenics and instrumentation for the linac are the same as or similar to those used in the ILC at a scale of about one percent of a full ILC linac.

365

Identifying Differences in Cultural Behavior in Online Groups  

SciTech Connect

We have developed methods to identify online communities, or groups, using a combination of structural information variables and content information variables from weblog posts and their comments to build a characteristic footprint for groups. We have worked with both explicitly connected groups and 'abstract' groups, in which the connection between individuals is in interest (as determined by content based features) and behavior (metadata based features) as opposed to explicit links. We find that these variables do a good job at identifying groups, placing members within a group, and helping determine the appropriate granularity for group boundaries. The group footprint can then be used to identify differences between the online groups. In the work described here we are interested in determining how an individual's online behavior is influenced by their membership in more than one group. For example, individuals belong to a certain culture; they may belong as well to a demographic group, and other 'chosen' groups such as churches or clubs. There is a plethora of evidence surrounding the culturally sensitive adoption, use, and behavior on the Internet. In this work we begin to investigate how culturally defined internet behaviors may influence behaviors of subgroups. We do this through a series of experiments in which we analyze the interaction between culturally defined behaviors and the behaviors of the subgroups. Our goal is to (a) identify if our features can capture cultural distinctions in internet use, and (b) determine what kinds of interaction there are between levels and types of groups.

Gregory, Michelle L.; Engel, David W.; Bell, Eric B.; Mcgrath, Liam R.

2012-07-23T23:59:59.000Z

366

Anomalous skin effects in relativistic parallel propagating weakly magnetized electron plasma waves  

SciTech Connect

Fully relativistic analysis of anomalous skin effects for parallel propagating waves in a weakly magnetized electron plasma is presented and general expressions for longitudinal and transverse permittivites are derived. It is found that the penetration depth for R- and L-waves increases as we move from non-relativistic to highly relativistic regime. The ambient magnetic field reduces/enhances the skin effects for R-wave/L-wave as the strength of the field is increased. In general, the weak magnetic field effects are pronounced for the weakly relativistic regime as compared with other relativistic cases. The results are also graphically illustrated. On switching off the magnetic field, previous results for field free case are retrieved [A. F. Alexandrov, A. S. Bogdankevich, and A. A. Rukhadze, Priniples of Plasma Electrodynamics (Springer-Verlag, Berlin, Heidelberg, 1984), Vol. 9, p. 106].

Abbas, Gohar; Bashir, M. F. [Salam Chair in Physics, G. C. University, Lahore 54000 (Pakistan); Department of Physics, G. C. University, Lahore 54000 (Pakistan); Murtaza, G. [Salam Chair in Physics, G. C. University, Lahore 54000 (Pakistan)

2011-10-15T23:59:59.000Z

367

Social Interactions, Ethnicity and Fertility in Kenya  

E-Print Network (OSTI)

are grateful to Wiji Arulampalam, Ethan Cohen-Cole, Partha Dasgupta, Gernot Doppelhofer, Steven Durlauf, Timothy Guinnane, Andrew Harvey, Larry Iannaccone, Hashem Pesaran, Richard Smith, and Chander Velu. We acknowledge funding from the Centre for Research... of the group is small, such as interaction e¤ects within extended families of small communities. 3 Overview of ethnic groups in Kenya Social interactions and channels of message transmission about fertility behaviour are important at the level of ethnicity...

Iyer, Sriya; Weeks, Melvyn

368

Swatch Group | Open Energy Information  

Open Energy Info (EERE)

Swatch Group Jump to: navigation, search Name Swatch Group Place Switzerland Product String representation "The Swatch Grou ... ther industries" is too long. References Swatch...

369

Parabolic subgroups of Garside groups  

E-Print Network (OSTI)

A Garside monoid is a cancellative monoid with a finite lattice generating set; a Garside group is the group of fractions of a Garside monoid. The family of Garside groups contains the Artin-Tits groups of spherical type. We generalise the well-known notion of a parabolic subgroup of an Artin-Tits group into that of a parabolic subgroup of a Garside group. We also define the more general notion of a Garside subgroup of a Garside group, which is related to the notion of LCMhomomorphisms between Artin-Tits groups. We prove that most of the properties of parabolic subgroups extend to this subgroups.

Eddy Godelle

2008-01-01T23:59:59.000Z

370

NSLS Committees | Interlock Working Group  

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

Interlock Working Group Charge The NSLS Interlock Working Group shall review all new construction and modification of NSLS and SDL personnel protection interlock systems. It is the...

371

Verdeo Group | Open Energy Information  

Open Energy Info (EERE)

Verdeo Group Jump to: navigation, search Name Verdeo Group Place Washington, DC Zip 20006 Sector Carbon Product Washington based integrated carbon solutions company. References...

372

Enovos Group | Open Energy Information  

Open Energy Info (EERE)

Enovos Group Jump to: navigation, search Name Enovos Group Place Germany Sector Solar Product Germany-based utility. The utility has interests in solar energy. References Enovos...

373

Copelouzos Group | Open Energy Information  

Open Energy Info (EERE)

Copelouzos Group Jump to: navigation, search Name Copelouzos Group Place Athens, Greece Product Fully integrated business development organisation, servicing key industrial and...

374

Samaras Group | Open Energy Information  

Open Energy Info (EERE)

Twitter icon Samaras Group Jump to: navigation, search Name Samaras Group Place Greece Sector Renewable Energy, Services Product Greek consultancy services provider with...

375

Argonne Physics Division - Theory Group  

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

Argonne Theory Group: Postdoctoral Position The Theory Group in the Physics Division at Argonne National Laboratory is seeking exceptional candidates for a postdoctoral position...

376

Police Group, Emergency Services Division  

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

Police Group Logo Police Group Mission Statement: To serve and protect the Brookhaven National Laboratory site, its employees, guests, and physical assets from unwanted...

377

Interagency Advanced Power Group -- Steering group meeting minutes  

DOE Green Energy (OSTI)

This document contains the draft meeting minutes of the Steering Group of the Interagency Advanced Power Group. Included are the discussions resulting from the presentation of working group reports and the results of a discussion of IAPG policies and procedures. In the appendix are the reports of the following working groups: Electrical, Mechanical, Solar, and Systems.

Not Available

1993-11-18T23:59:59.000Z

378

The Brattle Group  

E-Print Network (OSTI)

The opinions and views expressed in this staff report do not necessarily represent those of the Federal Energy Regulatory Commission, its Chairman, or individual Commissioners, and are not binding on the Commission. ACKNOWLEDGEMENTS The analysis presented in this report was produced by a team of consultants from The Brattle Group (TBG), Freeman, Sullivan & Co. (FSC) and Global Energy Partners (GEP). Each firm led different parts of the project, typically with significant input from the other firms. TBG managed the project and was the lead contractor to the Federal Energy Regulatory Commission (FERC). TBG also had the lead in producing this report. FSC was the lead contractor on model development, and also developed the state and customer-segment level load shapes that were used as starting points for developing demand response impacts. FSC and TBG worked together to develop price impacts that reflect the extensive research that has been done in this area. GEP had the lead on data development with input from both TBG and FSC. Gary Fauth, an independent consultant specializing in advanced metering business case analysis, had the lead role in producing the advanced metering deployment scenario that underlies one of the potential estimates. Senior staff from all three firms worked jointly to develop scenario definitions and to provide defensible input assumptions for key drivers of demand response potential.

Ahmad Faruqui; Ryan Hledik; Stephen S. George; Josh Bode; Paul Mangasarian; Ingrid Rohmund; Greg Wikler; Debyani Ghosh; Sharon Yoshida

2009-01-01T23:59:59.000Z

379

World Bank Group  

E-Print Network (OSTI)

purpose of this Good Practice Note is to increase the awareness of the health risks related to occupational asbestos exposure, provide a list of resources on international good practices available to minimize these risks, and present an overview of some of the available product alternatives on the market. The need to address asbestos-containing materials (ACM) as a hazard is no longer under debate but a widely accepted fact. Practices regarding asbestos that are normally considered acceptable by the World Bank Group (WBG) in projects supported through its lending or other instruments are addressed in the WBG’s General Environmental, Health and Safety (EHS) Guidelines. 1 This Good Practice Note provide background and context for the guidance in the WBG EHS Guidelines. Good practice is to minimize the health risks associated with ACM by avoiding their use in new construction and renovation, and, if installed asbestos-containing materials are encountered, by using internationally recognized standards and best practices (such as those presented in Appendix 3) to mitigate their impact. In all cases, the Bank expects borrowers and other clients of World Bank funding to use alternative materials wherever feasible.

unknown authors

2009-01-01T23:59:59.000Z

380

Surgery groups of the fundamental groups of hyperplane arrangement complements.  

E-Print Network (OSTI)

Using a recent result of Bartels and Lueck (arXiv:0901.0442) we deduce that the Farrell-Jones Fibered Isomorphism conjecture in L-theory is true for any group which contains a finite index strongly poly-free normal subgroup, in particular, for the Artin full braid groups. As a consequence we explicitly compute the surgery groups of the Artin pure braid groups. This is obtained as a corollary to a computation of the surgery groups of a more general class of groups, namely for the fundamental group of the complement of any fiber-type hyperplane arrangement in the complex n-space.

S. Roushon.; 491-500

Note: This page contains sample records for the topic "group weak interactions" 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

HSS Focus Group Training Work Group Meeting | Department of Energy  

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

HSS Focus Group Training Work Group Meeting HSS Focus Group Training Work Group Meeting HSS Focus Group Training Work Group Meeting Meeting Dates: July 10 - 11 The Department of Energy (DOE) Office of Health, Safety and Security (HSS) Focus Group Training Work Group met at the DOE National Training Center (NTC) inAlbuquerque, NM on Tuesday, July 10 and Wednesday, July 11, 2012. The meeting was chaired by the Work Group co-chairs, Karen Boardman (HSS/NTC),Pete Stafford (AFL-CIO BCTD/CPWR), and Julie Johnston (EFCOG). Attachment 1 is the Meeting Agenda; Attachment 2 is a list of meeting attendees; and Attachment3 is the proposed Radworker Training Reciprocity Program. Meeting Agenda Meeting Summary Draft RAD Worker Training Reciprocity Program for Work Group v.1 Draft Radiation Worker Portability Validation

382

TEC Working Group Topic Groups | Department of Energy  

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

Topic Groups Topic Groups TEC Working Group Topic Groups TEC Topic Groups were formed in 1991 following an evaluation of the TEC program. Interested members, DOE and other federal agency staff meet to examine specific issues related to radioactive materials transportation. TEC Topic Groups enable a small number of participants to focus intensively on key issues at a level of detail that is unattainable during the TEC semiannual meetings due to time and group size constraints. Topic Groups meet individually by phone and email between TEC's semiannual general meetings, participate in conference calls and report back to the Department and TEC members. The Topic Groups are intended to work on significant issues, produce a relevant product and sunset the group when the work is

383

Gold and Black Group Paws Training Plans Gold Group Black Group  

E-Print Network (OSTI)

Gold and Black Group Paws Training Plans Gold Group Black Group Week Day Distance Description Day://www.badgerlandstriders.org/home/Races/TheDeerRun.htm. Black Group The goal of the Black Group is to go from moderate running to 13 miles over a ten week include periodic walking breaks as needed. The Black Group should run four days a week on a Monday

Saldin, Dilano

384

September 8, 2011, HSS/Union Focus Group Work Group Telecom - Work Group Charter  

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

Office of Health, Safety and Security Focus Group [Name of Work Group] Work Group Charter (Date) I. PURPOSE The HSS Focus Group [Name of Work Group] is one of several HSS Work Groups, established to address worker health, safety and security programs improvements across the U.S. Department of Energy Complex. The [Name of Work Group] has been established to (state specific purpose). II. OBJECTIVES (State the desired impact(s) and major outcome(s) for, the Work Group) 1. Establish specific improvement goals, intended outputs and supporting activities that respond to identified worker health and safety improvement needs. 2. Establish measurable indicators when possible to support findings, recommendations and accomplishments.

385

OGJ group weathered tough times upstream and downstream in 1991  

Science Conference Proceedings (OSTI)

With an upstream sector hit by low oil and gas prices and downstream operations squeezed by weak petroleum demand, 1991, was a tough year for the group of 22 major integrated U.S. companies Oil and Gas Journal tracks. This paper reports that the brief respite caused by the oil price spike in second half 1990 ended abruptly early in first half 1991, and it turned into a year of buckling down for most companies. They shed non-core assets, implemented strategic restructuring moves, and reduced staff. Although low prices slowed overall drilling activity for the group, oil and gas production increased slightly, and most companies reported reserves gains. Recession in the U.S. and Europe depressed demand for the group's fined products enough to pinch downstream earnings even as buoyant Asia-Pacific demand helped jack up world product sales.

Biggs, J.B.; Price, R.B.

1992-05-25T23:59:59.000Z

386

Hypothesis Test: Comparing Two Groups  

E-Print Network (OSTI)

1 Hypothesis Test: Comparing Two Groups Hypothesis Test: Two-sample Elements of two-sample test of two paired groups Comparing proportions of two groups Hypothesis test errors GOG 502/PLN 504 Youqin Huang 42 Two-sample Test Hypothesis tests on the difference between two different groups Examples

Huang, Youqin

387

Affine buildings for dihedral groups  

E-Print Network (OSTI)

We construct rank 2 thick nondiscrete affine buildings associated with an arbitrary finite dihedral group.

Berenstein, Arkady

2008-01-01T23:59:59.000Z

388

Security Outreach and Integration Group  

Science Conference Proceedings (OSTI)

Security Outreach and Integration Group. Welcome. The US economy, citizens, and government rely on information technology. ...

2013-01-17T23:59:59.000Z

389

QCD Corrections to Vector Boson Pair Production via Weak Boson Fusion  

E-Print Network (OSTI)

NLO-QCD corrections to vector boson pair production via weak boson fusion have recently been calculated and implemented into flexible parton-level Monte-Carlo programs. These allow for the computation of cross sections and kinematical distributions within realistic experimental cuts. We summarize the basic elements of the calculation and review phenomenological results for the LHC.

B. Jager; C. Oleari; D. Zeppenfeld

2006-08-24T23:59:59.000Z

390

Fuzzy programming problem in the weakly structurable dynamic system and choice of decisions  

Science Conference Proceedings (OSTI)

This work deals with the problems of the Weakly Structurable Continuous Dynamic System (WSCDS) optimal control and briefly discuss the results developed by G. Sirbiladze [17]. Sufficient and necessary conditions are presented for the existence of an ... Keywords: Bellman's optimality principle, WSCDS, extended extremal fuzzy measures, fuzzy dynamic systems, fuzzy gain-loss process, fuzzy optimal control, sugeno type extremal integrals

Gia Sirbiladze; Anna Sikharulidze; Natia Sirbiladze

2008-11-01T23:59:59.000Z

391

Power quality analysis of wind generator connected to the weak grid during low wind speed  

Science Conference Proceedings (OSTI)

Power quality analysis based on measurements performed on wind generator during low wind speed is presented in the paper. Wind generator is connected via 10 kV cable to the distribution network, where grid is weak with low value of short-circuit power. ... Keywords: distribution network, harmonics, power quality, wind speed, wind turbine

Aleksandar Nikolic; Branka Kostic; Maja Markovic; Sasa Minic; Srdjan Milosavljevic

2011-07-01T23:59:59.000Z

392

The Passage of a Weak Thunderstorn Downburst over an Instrumented Tower  

Science Conference Proceedings (OSTI)

On 5 November 1977 a weak downburst associated with a multicell storm passed over an instrumented tower at Bald Hills, a suburb of Brisbane, Australia. Associated with the thunderstorm was a dome of cold air estimated to be 1200 to 1800 m deep. ...

Douglas J. Sherman

1987-06-01T23:59:59.000Z

393

Fuzzy Rule–Based Approach for Detection of Bounded Weak-Echo Regions in Radar Images  

Science Conference Proceedings (OSTI)

A method for the detection of a bounded weak-echo region (BWER) within a storm structure that can help in the prediction of severe weather phenomena is presented. A fuzzy rule–based approach that takes care of the various uncertainties associated ...

Nikhil R. Pal; Achintya K. Mandal; Srimanta Pal; Jyotirmay Das; V. Lakshmanan

2006-09-01T23:59:59.000Z

394

Surface Science Prospectives Weakly bound buffer layers: A versatile template for metallic nano-clusters  

E-Print Network (OSTI)

Surface Science Prospectives Weakly bound buffer layers: A versatile template for metallic nano layers Metallic nano-crystals Film patterning Laser ablation a b s t r a c t Buffer layers composed controlled growth of nano-clusters and for patterning of thin metallic films. Metallic nano-crystals can

Asscher, Micha

395

Comment on "Weak instrument robust tests in GMM and the new Keynesian Phillips curve"  

E-Print Network (OSTI)

Comment on "Weak instrument robust tests in GMM and the new Keynesian Phillips curve", Frank Kleibergen, Sophocles Mavroeidis. Journal of Business and Economic Statistics. July 1, 2009, 27(3): 293-311. doi:10.1198/jbes.2009.08280.

Mikusheva, Anna

396

Stability boundary analysis of the dynamic voltage restorer in weak systems with dynamic loads  

Science Conference Proceedings (OSTI)

In this contribution, a stability analysis for a dynamic voltage restorer (DVR) connected to a weak ac system containing a dynamic load is presented using continuation techniques and bifurcation theory. The system dynamics are explored through the continuation ... Keywords: DVR, Floquet multiplier, active filter, continuation techniques, iterative map, point common coupling, power converter, stability regions, switching process

Juan Segundo-Ramírez; Aurelio Medina; Arindam Ghosh; Gerard Ledwich

2012-06-01T23:59:59.000Z

397

The Very Stable Boundary Layer on Nights with Weak Low-Level Jets  

Science Conference Proceedings (OSTI)

The light-wind, clear-sky, very stable boundary layer (vSBL) is characterized by large values of bulk Richardson number. The light winds produce weak shear, turbulence, and mixing, and resulting strong temperature gradients near the surface. Here ...

Robert M. Banta; Larry Mahrt; Dean Vickers; Jielun Sun; Ben B. Balsley; Yelena L. Pichugina; Eric J. Williams

2007-09-01T23:59:59.000Z

398

Longitudinal singular response of dusty plasma medium in weak and strong coupling limits  

Science Conference Proceedings (OSTI)

The longitudinal response of a dusty plasma medium in both weak and strong coupling limits has been investigated in detail using analytic as well as numerical techniques. In particular, studies on singular response of the medium have been specifically investigated here. A proper Galilean invariant form of the generalized hydrodynamic fluid model has been adopted for the description of the dusty plasma medium. For weak non-linear response, analytic reductive perturbative approach has been adopted. It is well known that in the weak coupling regime for the dusty plasma medium, such an analysis leads to the Korteweg-de Vries equation (KdV) equation and predicts the existence of localized smooth soliton solutions. We show that the strongly coupled dust fluid with the correct Galilean invariant form does not follow the KdV paradigm. Instead, it reduces to the form of Hunter-Saxton equation, which does not permit soliton solutions. The system in this case displays singular response with both conservative as well as dissipative attributes. At arbitrary high amplitudes, the existence and spontaneous formation of sharply peaked cusp structures in both weak and strong coupling regimes has been demonstrated numerically.

Kumar Tiwari, Sanat; Das, Amita; Kaw, Predhiman; Sen, Abhijit [Institute for Plasma Research, Bhat, Gandhinagar - 382428 (India)

2012-01-15T23:59:59.000Z

399

Cross Terms and Weak Frequency Dependent Signals in the CMB Sky  

E-Print Network (OSTI)

In this paper, we study the amplification of weak frequency dependent signals in the CMB sky due to their cross correlation to intrinsic anisotropies. In particular, we center our attention on mechanisms generating some weak signal, of peculiar spectral behaviour, such as resonant scattering in ionic, atomic or molecular lines, thermal SZ effect or extragalactic foreground emissions, whose typical amplitude (denoted by $\\epsilon$) is sufficiently smaller than the intrinsic CMB fluctuations. We find that all these effects involve either the autocorrelation of anisotropies generated during recombination ($z_{rec}$) or the cross-correlation of those anisotropies with fluctuations arising at some later redshift $z_i$. The degree of this correlation can be computed under the assumption that density fluctuations were generated as standard inflationary models dictate and that they evolved in time according to linear theory. In case that the weak signal is frequency dependent, we show that, by substracting power spectra at different frequencies, it is possible to avoid the limit associated to Cosmic Variance and unveil weaker terms linear in $\\epsilon$. We find that the correlation term shows a different spectral dependence than the squared ($\\propto \\epsilon^2$) term considered usually, making its extraction particularly straightforward for the thermal SZ effect. Furthermore, we find that in most cases the correlation terms are particularly relevant at low multipoles and must be taken into account when characterising the power spectrum associated to weak signals in the large angular scales.

C. Hernandez-Monteagudo; R. A. Sunyaev; MPA; IKI

2004-05-25T23:59:59.000Z

400

Wind turbine aerodynamics using ALE---VMS: validation and the role of weakly enforced boundary conditions  

Science Conference Proceedings (OSTI)

In this article we present a validation study involving the full-scale NREL Phase VI two-bladed wind turbine rotor. The ALE---VMS formulation of aerodynamics, based on the Navier---Stokes equations of incompressible flows, is employed in conjunction ... Keywords: ALE---VMS, Finite elements, NREL 5MW offshore, NREL Phase VI, Weakly enforced essential boundary conditions, Wind turbine aerodynamics

Ming-Chen Hsu; Ido Akkerman; Yuri Bazilevs

2012-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Weak aggregating algorithm for the distribution-free perishable inventory problem  

Science Conference Proceedings (OSTI)

We formulate the multiperiod, distribution-free perishable inventory problem as a problem of prediction with expert advice and apply an online learning method (the Weak Aggregating Algorithm) to solve it. We show that the asymptotic average performance ... Keywords: Aggregating algorithm, Newsvendor problem, Online learning

Tatsiana Levina; Yuri Levin; Jeff Mcgill; Mikhail Nediak; Vladimir Vovk

2010-11-01T23:59:59.000Z

402

Parabolic lines and caustics in weakly anisotropic solids 9iFODY##9DYU\\XN  

E-Print Network (OSTI)

117 Parabolic lines and caustics in weakly anisotropic solids 9iFODY##9DYU\\þXN *HRSK@ig.cas.cz Summary The behaviour of parabolic lines and caustics in anisotropic solids can be, in general, very, no parabolic lines appear on the S1 slowness sheet. Consequently, the S1 wave sheet displays no caustics

Cerveny, Vlastislav

403

Weak Hopf Algebras unify the Hennings-Kauffman-Radford and the Reshetikhin-Turaev invariant  

E-Print Network (OSTI)

We present an invariant of connected and oriented closed 3-manifolds based on a coribbon Weak Hopf Algebra H with a suitable left-integral. Our invariant can be understood as the generalization to Weak Hopf Algebras of the Hennings-Kauffman-Radford evaluation of an unoriented framed link using a dual quantum-trace. This quantum trace satisfies conditions that render the link evaluation invariant under Kirby moves. If H is a suitable finite-dimensional Hopf algebra (not weak), our invariant reduces to the Kauffman-Radford invariant for the dual of H. If H is the Weak Hopf Algebra Tannaka-Krein reconstructed from a modular category C, our invariant agrees with the Reshetikhin-Turaev invariant. In particular, the proof of invariance of the Reshetikhin-Turaev invariant becomes as simple as that of the Kauffman-Radford invariant. Modularity of C is only used once in order to show that the invariant is non-zero; apart from this, a fusion category with ribbon structure would be sufficient. Our generalization of the ...

Pfeiffer, Hendryk

2011-01-01T23:59:59.000Z

404

The Role of Latent Heat Release in the Evolution of a Weak Extratropical Cyclone  

Science Conference Proceedings (OSTI)

A study of the sensitivity of a weak winter extratropical cyclone to latent heat release (LHR) is presented using 48-h simulations of the cyclone's evolution derived from three versions of the LFM model: a MOIST simulation in which full model ...

John E. Zimmerman; Phillip J. Smith; David R. Smith

1989-05-01T23:59:59.000Z

405

Forecast of Weak Electrical Signals in Dahlia pinnata by Neural Networks  

Science Conference Proceedings (OSTI)

Signals of electrics in Dahlia pinnata were tested by a touching test system of self-made double shields with platinum sensors and tested data of electrical signals denoised by the wavelet soft threshold and also using Gaussian radial base function (RBF) ... Keywords: radial base function (RBF) neural network, wavelet soft threshold denoising, plant weak electrical signal, intelligent control, Dahlia pinnata

Lanzhou Wang; Jinli Ding

2010-05-01T23:59:59.000Z

406

An Application of a Weakly Constrained 4DVAR to Satellite Data Assimilation and Heavy Rainfall Simulation  

Science Conference Proceedings (OSTI)

In this paper a simple weakly constrained four-dimensional variational data assimilation (4DVAR) technique (W4DVAR) is used in the assimilation of retrieved satellite data for a heavy rainfall simulation. The W4DVAR and the strongly constrained ...

Mi-Seon Lee; Dong-Kyou Lee

2003-09-01T23:59:59.000Z

407

Comparative Evaluation of Eddy Exchange Coefficients for Strong and Weak Wind Stable Boundary Layer Modeling  

Science Conference Proceedings (OSTI)

Five local K-closure formulations and a TKE closure were incorporated in a one-dimensional version of the Pielke’s model, and a comparative evaluation of the closure schemes was made for strong and weak wind stable boundary layer (SBL). The ...

Maithili Sharan; S. G. Gopalakrishnan

1997-05-01T23:59:59.000Z

408

AvrRpm1 Missense Mutations Weakly Activate RPS2-Mediated Immune Response in Arabidopsis thaliana  

E-Print Network (OSTI)

AvrRpm1 Missense Mutations Weakly Activate RPS2- Mediated Immune Response in Arabidopsis thaliana Plants recognize microbes via specific pattern recognition receptors that are activated by microbe to pathogen proliferation. Plant pathogenic bacteria like Pseudomonas syringae utilize a type III secretion

Dangl, Jeff

409

Fermilab Steering Group Report  

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

Acknowledgement Acknowledgement The Fermilab Steering Group is grateful to many members of the particle physics and accelerator community for their expert advice and contributions to the preparation of this report: Robert Abrams, Nikolai Andreev, Charles Ankenbrandt, Giorgio Apollinari, Jeff Appel, Rick Baartman, Jonathan Bagger, Wander Baldini, Barry Barish, Gerald Blazey, Dixon Bogert, Ed Bonnema, James Brau, Steven Brice, Stanley Brodsky, Daniel Broemmelsiek, Alan Bross, Charles Brown, Douglas Bryman, William Bugg, Alexey Burov, Phillip Burrows, Maksim Bychkov, Robert Cahn, Marcela Carena, Jean-Paul Carneiro, Harry Carter, Robert Carey, Brian Chase, David Christian, Michael Church, Willie Clark, Janet Conrad, John Corlett, Mary Anne Cummings, Dan Dale, Chris Damerell, Paul Debevec, André de Gouvea, Fritz DeJongh, Marcel Demarteau, Paul Derwent, Milind Diwan, Harold Lee Dodds, Gerald Dugan, Craig Dukes, Estia Eichten, Eckhard Elsen, Louis Emery, Peter Fisher, George Flanagan, Tony Favale, Gary Feldman, Buck Field, David Finley, Bonnie Fleming, Brian Foster, Emil Frlez, Kenneth Ganezer, Consolato Gattuso, Stephen Geer, Norman Gelfand, Terry Goldman, Keith Gollwitzer, Maury Goodman, Paul Grannis, Daniel Green, Terry Grimm, Alan Hahn, Reidar Hahn, Michael Harrison, Ayman Hawari, David Hertzog, Robert Hirosky, David Hitlin, Richard Holmes, Maxine Hronek, Patrick Hurh, Jim Hylen, Gerald Jackson, Andreas Jansson, David Johnson, Jeffrey Johnson, Rol Johnson, John Johnstone, Chang Kee Jung, Steven Kahn, Peter Kammel, Yuri Kamyshkov, David Kawall, Kara Keeter, Christina Keller, Robert Kephart, Harold Kirk, David Kirkby, Arkadiy Klebaner, Sergey Korenev, Ioanis Kourbanis, Andreas Kronfeld, Krishna Kumar, James Lackey, Kenneth Lande, Valeri Lebedev, Kevin Lesko, Tony Leveling, Mats Lindroos, Laurence Littenberg, Vladimir Lobashev, Kevin Lynch, William Marciano, Daniel Marlow, John Marriner, Michael Martens, Dongming Mei, Mark Messier, Peter Meyers, Phillip Miller, Shekhar Mishra, Hugh Montgomery, Kevin Munday, Homer Neal, David Neuffer, Andrew Norman, Kenneth Olsen, Peter Ostroumov, Satoshi Ozaki, Robert Palmer, Vaia Papadimitriou, Stephen Parke, Kent Paschke, Ralph Pasquinelli, Todd Pedlar, Stephen Peggs, Susan Pfiffner, Henryk Piekarz, Thomas Phillips, Dinko Pocanic, Milorad Popovic, James Popp, Eric Prebys, Chris Quigg, Regina Rameika, Ronald Ray, Lee Roberts, Tom Roberts, Natalie Roe, Jerome Rosen, Marc Ross, Howard Rubin, Randy Ruchti, Richard Sah, Niki Saoulidou, Kate Scholberg, Alan Schwartz, Yannis Semertzidis, Abraham Seiden, Melvyn Shochet, Marilyn Smith, Henry Sobel, Paul Souder, Giulio Stancari, Michelle Stancari, Raymond Stefanski, James Stone, Sheldon Stone, Michael Syphers, Alex Tarasiewicz, Eddie Tatar, Rex Tayloe, Alvin Tollestrup, Yagmur Torun, Todd Treado, Michael Turner, Fred Ullrich, John Urbin, Alexander Valishev, Leonid Vorobiev, Nick Walker, Robert Webber, Bernard Wehring, Steven Werkema, Christopher White, Herman White, James Whitmore, David Wildman, Kent Alan Williams, William Willis, Phil Winkle, William Snow, Stanley Wojcicki, Hitoshi Yamamoto, Peter Yamin, Katsuya Yonehara, Cary Yoshikawa, Albert Young, Michael Zeller, Michael Zisman, Alexander Zlobin, and Robert Zwaska

410

The Evolution of Galaxies in Compact Groups  

E-Print Network (OSTI)

We present the analysis of the spectra of 62 galaxies in 15 compact groups. The galaxies were classified in four activity classes: galaxies without emission, starburst nucleus galaxies (SBNGs), luminous AGNs and low-luminosity AGNs (LLAGNs). The star formation in the HCG starbursts is more intense than in normal spirals, but comparable to those in the field SBNGs. Their mean gas metallicity is solar and they do not follow the metallicity-luminosity relation traced by the early-type SBNGs in the field, suggesting that most of them are late-type SBNGs. This morphology preference coupled to the observation that the HCG starbursts are predominantly in the halo of the groups is consistent with the idea that compact groups are embedded in sparser structures. The stellar metallicities of the non starburst galaxies are relatively high for their luminosities. In these galaxies the equivalent widths of the metal absorption lines are slightly narrower than normal while the Balmer absorption lines are relatively strong. All these galaxies could be ``post-starburst'' at an advanced stage of evolution. Our observations are supporting a scenario where the core of the groups are slowly collapsing evolved systems embedded in more extended structures (Ribeiro et al. 1998). In the core of the groups, the interactions were more frequent and the galaxies evolved at a more rapid rate than in their halos.

Roger Coziol; Reinaldo R. de Carvalho; Hugo V. Capelato; Andre L. B. Ribeiro

1998-05-30T23:59:59.000Z

411

Moveable Interactive Projected Displays  

E-Print Network (OSTI)

Video projectors have typically been used to display images on surfaces whose geometric relationship to the projector remains constant, such as walls or pre-calibrated surfaces. In this paper, we present a technique for projecting content onto moveable surfaces that adapts to the motion and location of the surface to simulate an active display. This is accomplished using a projector based location tracking techinque. We use light sensors embedded into the moveable surface and project low-perceptibility Graycoded patterns to first discover the sensor locations, and then incrementally track them at interactive rates. We describe how to reduce the perceptibility of tracking patterns, achieve interactive tracking rates, use motion modeling to improve tracking performance, and respond to sensor occlusions. A group of tracked sensors can define quadrangles for simulating moveable displays while single sensors can be used as control inputs. By unifying the tracking and display technology into a single mechanism, we can substantially reduce the cost and complexity of implementing applications that combine motion tracking and projected imagery.

Using Projector Based; Johnny C. Lee; Scott E. Hudson; Jay W. Summet; Paul H. Dietz

2005-01-01T23:59:59.000Z

412

HSS Focus Group Training Work Group Meeting | Department of Energy  

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

Training Work Group Meeting Training Work Group Meeting HSS Focus Group Training Work Group Meeting Meeting Dates: July 10 - 11 The Department of Energy (DOE) Office of Health, Safety and Security (HSS) Focus Group Training Work Group met at the DOE National Training Center (NTC) inAlbuquerque, NM on Tuesday, July 10 and Wednesday, July 11, 2012. The meeting was chaired by the Work Group co-chairs, Karen Boardman (HSS/NTC),Pete Stafford (AFL-CIO BCTD/CPWR), and Julie Johnston (EFCOG). Attachment 1 is the Meeting Agenda; Attachment 2 is a list of meeting attendees; and Attachment3 is the proposed Radworker Training Reciprocity Program. Meeting Agenda Meeting Summary Draft RAD Worker Training Reciprocity Program for Work Group v.1 Draft Radiation Worker Portability Validation Meeting Attendees

413

A comment about the existence of a weak solution for a non linear wave equation damped propagation  

E-Print Network (OSTI)

We give a proof for the existence of a weak solution on the initial-value problem of a non-linear damped propagation

Luiz C. L. Botelho

2009-08-31T23:59:59.000Z

414

Weak turbulence and collapses in the Majda-Mc-Laughlin-Tabak equation: Fluxes in wavenumber and in amplitude space  

E-Print Network (OSTI)

The turbulent energy flow of the onedimensional Majda-McLaughlin-Tabak equation is studied numerically. The system exhibits weak turbulence for weak driving forces, while weak turbulence coexists with strongly nonlinear intermittent collapses when the system is strongly driven. These two types of dynamics can be distinguished by their energy and particle fluxes. The weakly turbulent process can be characterized by fluxes in wavenumber space, while additional fluxes in amplitude space emerge in the intermittent process. The particle flux is directed from low amplitudes towards high amplitudes, and the energy flows in the opposite direction.

Benno Rumpf Laura Biven

2005-03-04T23:59:59.000Z

415

A WEAK-LENSING AND NEAR-INFRARED STUDY OF A3192: DISASSEMBLING A RICHNESS CLASS 3 ABELL CLUSTER  

SciTech Connect

We present a joint gravitational lensing and near-infrared study of the galaxy cluster Abell 3192 (A3192) that has been associated both with galaxies at z = 0.168 and with the X-ray luminous cluster RXC J0358.8-2955 (RXC J0358) at z = 0.425. Weak-lensing analysis of our Hubble Space Telescope snapshot observation with the Advanced Camera for Surveys detects two mass over-densities separated by {approx}2 arcmin, one adjacent to the optical position of A3192 (4.4{sigma} significance) and the other adjacent to the X-ray position of RXC J0358 (6.2{sigma} significance). These mass peaks coincide with peaks in the K-band luminosity density of galaxies with near-infrared colors consistent with the red sequence at z = 0.168 and z 0.425, respectively. Moreover, the Bayesian evidence of parameterized mass models that include two cluster/group-scale halos centered on the respective mass peaks exceeds that of single-halo models by a factor of {>=}10. The total projected mass of each galaxy system within 250 kpc of the respective peaks is M{sub WL}(z = 0.168) {approx_equal} 3 Multiplication-Sign 10{sup 13} M{sub Sun} and M{sub WL}(z = 0.425) {approx_equal} 1.2 Multiplication-Sign 10{sup 14} M{sub Sun }, both with total mass-to-light ratios of M{sub WL}/L{sub K} {approx_equal} 20 M{sub Sun }/L{sub Sun }. The original Abell cluster therefore comprises two independent galaxy systems-a foreground group at z = 0.168 and RXC J0358 at z = 0.425. Our results demonstrate the power of combining X-ray, near-infrared, and weak-lensing observations to select massive clusters, place those clusters and interloper galaxy systems along the line of sight, and measure their masses. This combination will be invaluable to robust interpretation of future high-redshift cluster surveys, including eROSITA.

Hamilton-Morris, Victoria; Smith, Graham P.; Haines, C. P.; Sanderson, A. J. R. [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom); Edge, A. C. [Institute of Computational Cosmology, Durham University, South Road, Durham DH1 3LE (United Kingdom); Egami, E. [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Marshall, P. J. [Sub-department of Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH (United Kingdom); Targett, T. A., E-mail: vhh@star.sr.bham.ac.uk, E-mail: gps@star.sr.bham.ac.uk [SUPA, Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ (United Kingdom)

2012-04-01T23:59:59.000Z

416

Particle Data Group - Authors  

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

8 Edition 8 Edition C. Amsler et al. (Particle Data Group), Physics Letters B667, 1 (2008) Also see: PDF format. AUTHORS: (Click on Author Name to get Email address, phone numbers, etc.) RPP authors C. Amsler, 1 M. Doser, 2 M. Antonelli, 3 D. Asner, 4 K.S. Babu, 5 H. Baer, 6 H.R. Band, 7 R.M. Barnett, 8 J. Beringer, 8 E. Bergren, G. Bernardi, 9 W. Bertl, 10 H. Bichsel, 11 O. Biebel, 12 P. Bloch, 2 E. Blucher, 13 S. Blusk, 14 R.N. Cahn, 8 M. Carena, 15,13,16 C. Caso, 17,* A. Ceccucci, 2 D. Chakraborty, 18 M.-C. Chen, 19 R.S. Chivukula, 20 G. Cowan, 21 O. Dahl, 8 G. D'Ambrosio, 22 T. Damour, 23 A. de Gouvea, 24 T. DeGrand, 25 B. Dobrescu, 15 M. Drees, 26 A. Edwards, 27 S. Eidelman, 28 V.D. Elvira, 15 J. Erler, 29 V.V. Ezhela, 30 J.L. Feng, 19 W. Fetscher, 31 B.D. Fields, 32 B. Foster, 33 T.K. Gaisser, 34 L. Garren, 15 H.-J. Gerber, 31 G. Gerbier, 35 T. Gherghetta, 36 G.F. Giudice, 2 M. Goodman, 37 C. Grab, 31 A.V. Gritsan, 38 J.-F. Grivaz, 39 D.E. Groom, 8 M. Grünewald, 40 A. Gurtu, 41,2 T. Gutsche, 42 H.E. Haber, 43 K. Hagiwara, 44 C. Hagmann, 45 K.G. Hayes, 46 J.J. Hernández-Rey, 47,¶ K. Hikasa, 48 I. Hinchliffe, 8 A. Höcker, 2 J. Huston, 20 P. Igo-Kemenes, 49 J.D. Jackson, 8 K.F. Johnson, 6 T. Junk, 15 D. Karlen, 50 B. Kayser, 15 D. Kirkby, 19 S.R. Klein, 51 I.G. Knowles, 52 C. Kolda, 53 R.V. Kowalewski, 50 P. Kreitz, 54 B. Krusche, 55 Yu.V. Kuyanov, 30 Y. Kwon, 56 O. Lahav, 57 P. Langacker, 58 A. Liddle, 59 Z. Ligeti, 8 C.-J. Lin, 8 T.M. Liss, 60 L. Littenberg, 61 J.C. Liu, 54 K.S. Lugovsky, 30 S.B. Lugovsky, 30 H. Mahlke, 62 M.L. Mangano, 2 T. Mannel, 63 A.V. Manohar, 64 W.J. Marciano, 61 A.D. Martin, 65 A. Masoni, 66 D. Milstead, 67 R. Miquel, 68 K. Mönig, 69 H. Murayama, 70,71,8 K. Nakamura, 44 M. Narain, 72 P. Nason, 73 S. Navas, 74,¶ P. Nevski, 61 Y. Nir, 75 K.A. Olive, 76 L. Pape, 31 C. Patrignani, 17 J.A. Peacock, 52 A. Piepke, 77 G. Punzi, 78 A. Quadt, 79, S. Raby, 80 G. Raffelt, 81 B.N. Ratcliff, 54 B. Renk, 82 P. Richardson, 65 S. Roesler, 2 S. Rolli, 83 A. Romaniouk, 84 L.J. Rosenberg, 11 J.L. Rosner, 13 C.T. Sachrajda, 85 Y. Sakai, 44 S. Sarkar, 86 F. Sauli, 2 O. Schneider, 87 D. Scott, 88 B. Seligman, 89 M. Shaevitz, 90 T. Sjöstrand, 91 J.G. Smith, 25 G.F. Smoot, 8 S. Spanier, 54 H. Spieler, 8 A. Stahl, 92 T. Stanev, 34 S.L. Stone, 14 T. Sumiyoshi, 93 M. Tanabashi, 94 J. Terning, 95 M. Titov, 96 N.P. Tkachenko, 30 N.A. Törnqvist, 97 D. Tovey, 98 G.H. Trilling, 8 T.G. Trippe, 8 G. Valencia, 99 K. van Bibber, 45 M.G. Vincter, 4 P. Vogel, 100 D.R. Ward, 101 T. Watari, 102 B.R. Webber, 101 G. Weiglein, 65 J.D. Wells, 103 M. Whalley, 65 A. Wheeler, 54 C.G. Wohl, 8 L. Wolfenstein, 104 J. Womersley, 105 C.L. Woody, 61 R.L. Workman, 106 A. Yamamoto, 44 W. -M. Yao, 8 O.V. Zenin, 30 J. Zhang, 107 R.-Y. Zhu 108 P.A. Zyla 8

417

Data Management Group Annual Report  

E-Print Network (OSTI)

iv Data Management Group Annual Report 2003 City of Hamilton City of Toronto GO Transit Regional of York Toronto Transit Commission The Data Management Group is a research program located ........................................................................................................ 3 Text-based Data Retrieval System `drs

Toronto, University of

418

Data Management Group Annual Report  

E-Print Network (OSTI)

Data Management Group Annual Report 2001 prepared by: Data Management Group Joint Program..............................................................................2 Text Based Data Retrieval System `drs' ..........................................................2 Internet Browser Data Retrieval System (iDRS)..............................................3 Complex Data

Toronto, University of

419

Data Management Group Annual Report  

E-Print Network (OSTI)

Data Management Group Annual Report 1999 prepared by: Data Management Group Joint Program................................................................. 1 INFORMATION PROCESSING ............................................. 2 Text Based Data Retrieval System `drs' ........................ 2 Internet Browser Data Retrieval System (iDRS) ............ 3

Toronto, University of

420

Professional Educators’ Common Interest Group  

Science Conference Proceedings (OSTI)

Promoting teaching excellence for those involved in university education and industrial training in lipids and oils. Professional Educators’ Common Interest Group Professional Educators’ Common Interest Group aocs awards Educators fats global info

Note: This page contains sample records for the topic "group weak interactions" 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

MTorres Group | Open Energy Information  

Open Energy Info (EERE)

MTorres Group Place Murcia, Spain Zip 30320 Sector Wind energy Product Wind turbine manufacturer References MTorres Group1 LinkedIn Connections CrunchBase Profile No CrunchBase...

422

Daesung Group | Open Energy Information  

Open Energy Info (EERE)

Name Daesung Group Place Jongno-Gu Seoul, Korea (Republic) Zip 110-300 Sector Hydro, Hydrogen Product Daesung Group, a Korea-based energy provider and electric machinary...

423

Research Highlights Sorted by Working Group  

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

Working Group Working Group Aerosol Life Cycle | Cloud Life Cycle | Cloud-Aerosol-Precipitation Interactions | Aerosol | Cloud Modeling | Cloud Properties | Radiative Processes Aerosol Life Cycle 2013 Bhattacharya, A. Wildfires Lead to More Warming Than Climate Models Predict, a New Mexico Fire Study Reports ASR Fast, J. . Development and Validation of a Black Carbon Mixing State Resolved Three-Dimensional Model ARM ASR Gilles, M., Moffet, R. Spectro-microscopic Measurements of Carbonaceous Aerosol Aging in Central California ARM ASR Kafle, D. N., Coulter, R. L. Micropulse Lidar-Derived Aerosol Optical Depth Climatology at ARM Sites Worldwide ARM Keppel-Aleks, G. Determining the Future of CO2 Using an Earth System Model ARM Li, Z. A Mixed Bag of Aerosols over Northeastern China ARM

424

Catalysis: Reactivity and Structure Group | Chemistry Department |  

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

Group Members Group Members Principal Investigators Jose Rodriguez Catalysis and surface science. Interaction and reaction of molecules with surfaces of metals, oxides, sulfides and carbides. Use of synchrotron-based techniques in surface and materials characterization (core and valence photoemission, x-ray absorption spectroscopy, x-ray diffraction). Modeling of surface reactions. Ping Liu Theoretical description of nanostructures, supported nanostructures, surfaces and their catalytic applications in heterogeneous catalysis and electrocatalysis. Density functional calculations, kinetic modeling and sensitivity analysis are employed to obtain a fundamental understanding of catalytic processes Dario Stacchiola Nano-Catalysis, Model mixed metal oxides, In-situ catalytic reactions at ambient pressures (AP). (Synchrotron PES, AP-XPS, AP-STM, AP-IRRAS, Inverse Catalyst, Nanoparticles, Graphene)

425

DOE STGWG Group | Department of Energy  

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

Group More Documents & Publications TEC Working Group Topic Groups Tribal Meeting Summaries TEC Working Group Topic Groups Tribal Conference Call Summaries STGWG Meeting - May...

426

Experimental Properties of Fluids Group  

Science Conference Proceedings (OSTI)

The Experimental Properties of Fluids Group, Physical and Chemical Properties Division of the Chemical Science and Technology Laboratory, NIST.

2000-07-24T23:59:59.000Z

427

Computer Integrated Building Processes Group  

Science Conference Proceedings (OSTI)

... Laboratory effective in October 2011, the Computer Integrated Building Processes Group ... Chris Brown) are now in the Systems Integration Division. ...

2013-07-12T23:59:59.000Z

428

Dimensional Metrology Group Staff Directory  

Science Conference Proceedings (OSTI)

... James Bowie, Group Office Manager, Secretary, 301-975-3468. Christopher Blackburn, Physical Science Technician, 301-975-6413. ...

2013-04-25T23:59:59.000Z

429

Surface and Nanostructure Metrology Group  

Science Conference Proceedings (OSTI)

... The Surface and Nanostructure Metrology Group in the Semiconductor & Dimensional Metrology Division of the Physical Measurement Laboratory ...

2013-06-24T23:59:59.000Z

430

Security Components and Mechanisms Group  

Science Conference Proceedings (OSTI)

Security Components and Mechanisms Group. Welcome. ... A security checklist is a document that contains instructions for securely configuring … ...

2013-01-17T23:59:59.000Z

431

Data Management Group Annual Report  

E-Print Network (OSTI)

Data Management Group Annual Report 1997 #12;Data Management Group Annual Report 1997 A co-operative project that is jointly funded by members of the Toronto Area Transportation Planning Data Collection: (416) 978-3941 #12;Data Management Group 1997 Annual Report Table of Contents 1 INTRODUCTION

Toronto, University of

432

Data Management Group Annual Report  

E-Print Network (OSTI)

Data Management Group Annual Report 2004 City of Hamilton City of Toronto GO Transit Regional of York Toronto Transit Commission The Data Management Group is a research program located of the funding partners: Ministry of Transportation, Ontario #12;SUMMARY The Data Management Group (DMG

Toronto, University of

433

Complementarity of weak lensing and peculiar velocity measurements in testing general relativity  

SciTech Connect

We explore the complementarity of weak lensing and galaxy peculiar velocity measurements to better constrain modifications to General Relativity. We find no evidence for deviations from General Relativity on cosmological scales from a combination of peculiar velocity measurements (for Luminous Red Galaxies in the Sloan Digital Sky Survey) with weak lensing measurements (from the Canadian France Hawaii Telescope Legacy Survey). We provide a Fisher error forecast for a Euclid-like space-based survey including both lensing and peculiar velocity measurements and show that the expected constraints on modified gravity will be at least an order of magnitude better than with present data, i.e. we will obtain {approx_equal}5% errors on the modified gravity parametrization described here. We also present a model-independent method for constraining modified gravity parameters using tomographic peculiar velocity information, and apply this methodology to the present data set.

Song, Yong-Seon [Korea Institute for Advanced Study, Dongdaemun-gu, Seoul 130-722 (Korea, Republic of); Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX (United Kingdom); Zhao Gongbo; Bacon, David; Koyama, Kazuya; Nichol, Robert C. [Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX (United Kingdom); Pogosian, Levon [Department of Physics, Simon Fraser University, Burnaby, BC, V5A 1S6 (Canada)

2011-10-15T23:59:59.000Z

434

A Computational Complexity-Theoretic Elaboration of Weak Truth-Table Reducibility  

E-Print Network (OSTI)

The notion of weak truth-table reducibility plays an important role in recursion theory. In this paper, we introduce an elaboration of this notion, where a computable bound on the use function is explicitly specified. This elaboration enables us to deal with the notion of asymptotic behavior in a manner like in computational complexity theory, while staying in computability theory. We apply the elaboration to sets which appear in the statistical mechanical interpretation of algorithmic information theory. We demonstrate the power of the elaboration by revealing a critical phenomenon, i.e., a phase transition, in the statistical mechanical interpretation, which cannot be captured by the original notion of weak truth-table reducibility.

Tadaki, Kohtaro

2011-01-01T23:59:59.000Z

435

The weak heat kernel asymptotic expansion and the quantum double suspension  

E-Print Network (OSTI)

In this paper we are concerned with the construction of a general principle that will allow us to produce regular spectral triples with finite and simple dimension spectrum. We introduce the notion of weak heat kernel asymptotic expansion (WHKAE) property of a spectral triple and show that the weak heat kernel asymptotic expansion allows one to conclude that the spectral triple is regular with finite simple dimension spectrum. The usual heat kernel expansion implies this property. Finally we show that WHKAE is stable under quantum double suspension, a notion introduced by Hong and Szymanski. Therefore quantum double suspending compact Riemannian spin manifolds iteratively we get many examples of regular spectral triples with finite simple dimension spectrum. This covers all the odd dimensional quantum spheres. Our methods also apply to the case of noncommutative torus.

Chakraborty, Partha Sarathi

2010-01-01T23:59:59.000Z

436

Test of weak and strong factorization in nucleus-nucleuscollisions atseveral hundred MeV/nucleon  

DOE Green Energy (OSTI)

Total and partial charge-changing cross sections have been measured for argon projectiles at 400 MeV/nucleon in carbon, aluminum, copper, tin and lead targets; cross sections for hydrogen were also obtained, using a polyethylene target. The validity of weak and strong factorization properties has been investigated for partial charge-changing cross sections; preliminary cross section values obtained for carbon, neon and silicon at 290 and 400 MeV/nucleon and iron at 400 MeV/nucleon, in carbon, aluminum, copper, tin and lead targets have been also used for testing these properties. Two different analysis methods were applied and both indicated that these properties are valid, without any significant difference between weak and strong factorization. The factorization parameters have then been calculated and analyzed in order to find some systematic behavior useful for modeling purposes.

La Tessa, Chiara; Sihver, Lembit; Zeitlin, Cary; Miller, Jack; Guetersloh, Stephen; Heilbronn, Lawrence; Mancusi, Davide; Iwata,Yoshiuki; Murakami, Takeshi

2006-06-21T23:59:59.000Z

437

Next-to-leading order QCD corrections to photon production via weak-boson fusion  

E-Print Network (OSTI)

We present a calculation of next-to-leading order QCD corrections to gamma jj production via weak-boson fusion at a hadron collider in the form of a flexible parton-level Monte Carlo program which allows us to study cross sections and distributions within experimentally relevant selection cuts. The radiative corrections are found to be moderate with residual scale uncertainties being considerably improved beyond tree level. The sensitivity of the reaction to anomalous W+ W- gamma couplings is investigated.

B. Jager

2010-04-06T23:59:59.000Z

438

The use of LEDS (light-emitting diode) to simulate weak YAG-laser beams  

SciTech Connect

The purpose of this report is to determine whether and under what conditions a light-emitting diode may be used to simulate a weak YAG-laser beam that has been scattered by a distant reflecting object. By examining the differences between laser radiation and LED radiation, the author concludes that there is no theoretical reason that a LED may not be used in place of the laser beam.

Young, M.

1981-01-01T23:59:59.000Z

439

A Survey of Analogs to Weak MgII Absorbers in the Present  

E-Print Network (OSTI)

We present the results of a survey of the analogs of weak MgII absorbers (rest frame equivalent width W(2796) 0.02 A, with 30% completeness for the weakest lines. We find the number of weak MgII absorber analogs with 0.02 < W(2796) < 0.3 to be dN/dz = 1.00 +/- 0.20 for 0 < z < 0.3. This value is consistent with cosmological evolution of the population. We consider the expected effect on observability of weak MgII absorbers of the decreasing intensity of the extragalactic background radiation eld from z~1 to z~0. Assuming that all the objects that produce absorption at z~1 are stable on a cosmological timescale, and that no new objects are created, we would expect dN/dz of 2-3 at z~0. About 30-50% of this z~0 population would be decendants of the parsec-scale structures that produce single-cloud, weak MgII absorbers at z~1. The other 50-70% would be lower density, kiloparsec-scale structures that produce CIV absorption, but not detectable low ionization absorption, at z~1. We conclude that at least one, and perhaps some fraction of both, of these populations has evolved away since z~1, in order to match the z~0 dN/dz measured in our survey. This would follow naturally for a population of transient structures whose generation is related to star-forming processes, whose rate has decreased since z~1.

Anand Narayanan; Jane C. Charlton; Joe R. Masiero; Ryan Lynch

2005-09-16T23:59:59.000Z

440

Effect of Correlated Noise on Source Shape Parameters and Weak Lensing Measurements  

E-Print Network (OSTI)

The measurement of shape parameters of sources in astronomical images is usually performed by assuming that the underlying noise is uncorrelated. Spatial noise correlation is however present in practice due to various observational effects and can affect source shape parameters. This effect is particularly important for measurements of weak gravitational lensing, for which the sought image distortions are typically of the order of only 1%. We compute the effect of correlated noise on two-dimensional gaussian fits in full generality. The noise properties are naturally quantified by the noise autocorrelation function (ACF), which is easily measured in practice. We compute the resulting bias on the mean, variance and covariance of the source parameters, and the induced correlation between the shapes of neighboring sources. We show that these biases are of second order in the inverse signal-to-noise ratio of the source, and could thus be overlooked if bright stars are used to monitor systematic distortions. Radio interferometric surveys are particularly prone to this effect because of the long-range pixel correlations produced by the Fourier inversion involved in their image construction. As a concrete application, we consider the search for weak lensing by large-scale structure with the FIRST radio survey. We measure the noise ACF for a FIRST coadded field, and compute the resulting ellipticity correlation function induced by the noise. In comparison with the weak-lensing signal expected in CDM models, the noise correlation effect is important on small angular scales, but is negligible for source separations greater than about 1 arcmin. We also discuss how noise correlation can affect weak-lensing studies with optical surveys.

A. Refregier; S. T. Brown

1998-03-24T23:59:59.000Z

Note: This page contains sample records for the topic "group weak interactions" 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

Subaru weak-lensing study of A2163: bimodal mass structure  

E-Print Network (OSTI)

We present a weak-lensing analysis of the merging cluster A2163 using Subaru/Suprime-Cam and CHFT/Mega-Cam data and discuss the dynamics of this cluster merger, based on complementary weak-lensing, X-ray, and optical spectroscopic datasets. From two dimensional multi-component weak-lensing analysis, we reveal that the cluster mass distribution is well described by three main components: a two component main cluster A2163-A with mass ratio 1:8, and its cluster satellite A2163-B. The bimodal mass distribution in A2163-A is similar to the galaxy density distribution, but appears as spatially segregated from the brightest X-ray emitting gas region. We discuss the possible origins of this gas-dark matter offset, and suggest the gas core of the A2163-A subcluster to have been stripped away by ram pressure from its dark matter component. The survival of this gas core to the tidal forces exerted by the main cluster let us infer a subcluster accretion with non-zero impact parameter. Dominated by the most massive compo...

Okabe, Nobuhiro; Mazzotta, Pasquale; Maurogordato, Sophie

2011-01-01T23:59:59.000Z

442

{sigma} meson exchange effect on non-mesonic hypernuclear weak decay observables  

Science Conference Proceedings (OSTI)

We analyze the influence of {sigma} meson exchange on the main non-mesonic hypernuclear weak decay observables: Total rate {gamma}{sub NM}, neutron-to-proton branching ratio {gamma}{sub n/p}, and proton asymmetry parameter a{sub {lambda}}. The {sigma} meson exchange is added to the standard strangeness-changing weak {lambda}N{yields}NN transition potential, which includes the exchange of the complete pseudoscalar and vector mesons octet ({pi},{eta},K,{rho},{omega},K{sup *}). Using a shell model formalism, the {sigma} meson weak coupling constants are adjusted to reproduce the recent {gamma}{sub NM} and {gamma}{sub n/p} experimental data for {sub {lambda}}{sup 5}He. Numerical results for the remaining observables of {sub {lambda}}{sup 5}He and all the observables of {sub {lambda}}{sup 12}C decays are presented. They clearly show that the addition of the {sigma} meson improves the agreement with the data. However, its effect it is not enough to reproduce well the a{sub {lambda}} values, which means that other improvements of the model must be explored to explain the puzzle posed by the experiments.

Barbero, C.; Mariano, A. [Departamento de Fisica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C.C. 67, 1900 La Plata (Argentina)

2006-02-15T23:59:59.000Z

443

The Soft-X-Ray Spectral Shape of X-Ray-Weak Seyferts  

E-Print Network (OSTI)

(I) We observed eight Seyfert~2s and two X--ray--weak Seyfert~1/QSOs with the ROSAT PSPC, and one Seyfert~2 with the ROSAT HRI. These targets were selected from the Extended 12\\um\\ Galaxy Sample. (II) Both Seyfert~1/QSOs vary by factors of 1.5---2. The photon indices steepen in the more luminous state, consistent with the variability being mainly due to the softest X--rays, which are confined to a size of less than a parsec. (III) Both the Seyfert~2s and Seyfert~1/QSOs are best fit with a photon index of $\\Gamma\\sim3$, which is steeper than the canonical value of $\\Gamma\\sim1.7$ measured for X--ray--strong Seyferts by ROSAT and at higher energies. Several physical explanations are suggested for the steeper slopes of X--ray--weak objects. (IV) We observed one Seyfert~2, NGC~5005, with the ROSAT HRI, finding about 13\\% of the soft X--rays to come from an extended component. This and other observations suggest that different components to the soft X--ray spectrum of some, if not all, X--ray--weak Seyferts may come from spatially distinct regions.

Brian Rush; Matthew A. Malkan

1995-07-27T23:59:59.000Z

444

PROBING PRIMORDIAL NON-GAUSSIANITY WITH WEAK-LENSING MINKOWSKI FUNCTIONALS  

SciTech Connect

We study the cosmological information contained in the Minkowski functionals (MFs) of weak gravitational lensing convergence maps. We show that the MFs provide strong constraints on the local-type primordial non-Gaussianity parameter f {sub NL}. We run a set of cosmological N-body simulations and perform ray-tracing simulations of weak lensing to generate 100 independent convergence maps of a 25 deg{sup 2} field of view for f {sub NL} = -100, 0 and 100. We perform a Fisher analysis to study the degeneracy among other cosmological parameters such as the dark energy equation of state parameter w and the fluctuation amplitude {sigma}{sub 8}. We use fully nonlinear covariance matrices evaluated from 1000 ray-tracing simulations. For upcoming wide-field observations such as those from the Subaru Hyper Suprime-Cam survey with a proposed survey area of 1500 deg{sup 2}, the primordial non-Gaussianity can be constrained with a level of f {sub NL} {approx} 80 and w {approx} 0.036 by weak-lensing MFs. If simply scaled by the effective survey area, a 20,000 deg{sup 2} lensing survey using the Large Synoptic Survey Telescope will yield constraints of f {sub NL} {approx} 25 and w {approx} 0.013. We show that these constraints can be further improved by a tomographic method using source galaxies in multiple redshift bins.

Shirasaki, Masato; Yoshida, Naoki; Nishimichi, Takahiro [Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8583 (Japan); Hamana, Takashi, E-mail: masato.shirasaki@ipmu.jp [National Astronomical Observatory of Japan, Tokyo 181-0015 (Japan)

2012-11-20T23:59:59.000Z

445

The Strength of Weak Cooperation: an Attempt to Understand the Meaning of Web 2.0  

E-Print Network (OSTI)

Abstract: This paper examines some continuities and ruptures in the use of Web 2.0 such as blogs, social media, user-generated content services etc. vis-à-vis earlier web services. We hypothesize that one of the sociological characteristics of Web 2.0 services is that making personal production public creates a new articulation between individualism and solidarity, which reveals the strength of weak cooperation. Web 2.0 services allow individual contributors to experience cooperation ex post. The strength of the weak cooperation arises from the fact that it is not necessary for individuals to have an ex ante cooperative action plan or altruistic intention. They discover cooperative opportunities only by making public their individual production. The paper illustrates this phenomenon by analysing the uses of different services and by looking at the new process of innovation that appears through Barcamp and Coworking spaces. Key words: Web 2.0, weak cooperation, BarCamp. E choing the euphoric 2000 internet bubble, the Web 2.0 label is now so widespread that it is increasingly difficult to define the boundaries and

Christophe Aguiton; Dominique Cardon; France Télécom R

2007-01-01T23:59:59.000Z

446

RHIC II Science Working Groups  

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

Workshops Workshops The series of RHIC II Science Workshops began in November 2004, at which time seven Working Groups were initiated. These groups met in workshops through 2005, with the purpose of providing an organized forum for the community to address and describe quantitatively the most important science issues for the proposed RHIC II luminosity upgrade, and corresponding detector upgrades. Each Working Group was led by three convenors representing theory and experiment, and each has produced a detailed report (except for the "New Directions" group, which provided a sounding board and input to the other groups). The Working Group reports are linked below. The summary "white paper" document, "Future Science at the Relativistic Heavy Ion Collider" (PDF), is based on these reports, and was prepared by a Writing Committee that included at least one convenor from each of the Working Groups.

447

Thermodynamics of MgB2 described by the weak-coupling two-band BCS model  

E-Print Network (OSTI)

Based on weak-coupling anisotropic BCS theory, the temperature dependence of energy gap and the specific heat are evaluated for the MgB2 superconductor, and the results are compared with experimental data. We show that the weak-coupling anisotropic BCS theory describes thermodynamic experimental data with high precision, 3-6%.

Mishonov, TM; Pokrovsky, Valery L.; Wei, HD.

2005-01-01T23:59:59.000Z

448

MHD simula+ons of the solar atmosphere: effects of weak ioniza+on and radia+on  

E-Print Network (OSTI)

true for space weather, though... #12;Outline · Plasma parameters of the solar atmosphere · EffectMHD simula+ons of the solar atmosphere: effects of weak ioniza+on and radia+on Hiroaki Isobe of weak ioniza+on in magne+c reconnec+on is solar chromosphere · Radia+on MHD simula+on of solar

Ito, Atsushi

449

Argonne Physics Division - Theory Group  

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

Thursday 30 August 2012 David Wilson Argonne National Lab, Argonne, IL. djwilson@anl.gov Contact Interaction approach to QCD Thursday 24 May 2012 Ian Clot University of Adelaide,...

450

Supersolid phase in atomic gases with magnetic dipole interaction  

SciTech Connect

A major obstacle for the experimental realization of a supersolid phase with cold atomic gases in an optical lattice is the weakness of the nearest-neighbor interactions achievable via magnetic dipole-dipole interactions. In this paper, we show that by using a large filling of atoms within each well, the characteristic energy scales are strongly enhanced. Within this regime, the system is well described by the rotor model, and the qualitative behavior of the phase diagram derives from mean-field theory. We find a stable supersolid phase for realistic parameters with chromium atoms.

Buehler, Adam; Buechler, Hans Peter [Institute for Theoretical Physics III, University of Stuttgart, Pfaffenwaldring 57, D-70550 (Germany)

2011-08-15T23:59:59.000Z

451

Ab initio investigation of intermolecular interactions in solid benzene  

E-Print Network (OSTI)

A computational strategy for the evaluation of the crystal lattice constants and cohesive energy of the weakly bound molecular solids is proposed. The strategy is based on the high level ab initio coupled-cluster determination of the pairwise additive contribution to the interaction energy. The zero-point-energy correction and non-additive contributions to the interaction energy are treated using density functional methods. The experimental crystal lattice constants of the solid benzene are reproduced, and the value of 480 meV/molecule is calculated for its cohesive energy.

O. Bludsky; M. Rubes; P. Soldan

2008-01-04T23:59:59.000Z

452

Connected gradings and fundamental group.  

E-Print Network (OSTI)

The main purpose of this paper is to provide explicit computations of the fundamental group of several algebras. For this purpose, given a $k$-algebra $A$, we consider the category of all connected gradings of $A$ by a group $G$ and we study the relation between gradings and Galois coverings. This theoretical tool gives information about the fundamental group of $A$, which allows its computation using complete lists of gradings.

Claude Cibils (I3M); Maria Julia Redondo (Departamento De Matematica UNS); Andrea Solotar (Departamento De Matematica UBA)

453

Biomass Interest Group Meetings - 2007  

Science Conference Proceedings (OSTI)

The Biomass Interest Group (BIG) provides technology updates and information exchange for funders of EPRI Program 84.005. The group sponsors research projects and technology summaries. This report assembles presentation materials from webcasts and other meetings conducted by the Biomass Interest Group in 2007. Presentations covered several technologies including the prospect of using cellulosic feedstock in the production of ethanol, as well as gasification, the synthesis of biodiesel, and the cofiring o...

2008-03-31T23:59:59.000Z

454

TEC Working Group Topic Groups Archives Training - Medical Training |  

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

Training - Medical Training Training - Medical Training TEC Working Group Topic Groups Archives Training - Medical Training The TEC Training and Medical Training Issues Topic Group was formed to address the training issues for emergency responders in the event of a radioactive material transportation incident. The Topic Group first met in 1996 to assist DOE in developing an approach to address radiological emergency response training needs and to avoid redundancy of existing training materials. The group worked with the Transportation Emergency Preparedness Program (TEPP) to review existing training material to determine its applicability, developed a front-end analysis describing an approach, and developed the Modular Emergency Response Radiological Transportation Training (MERRTT). In 1998, the Medical Training Issues

455

Energy or Mass and Interaction  

E-Print Network (OSTI)

A review. Problems: 1-Many empirical parameters and large dimension number; 2-Gravitation and Electrodynamics are challenged by dark matter and energy. Energy and nonlinear electrodynamics are fundamental in a unified nonlinear interaction. Nuclear energy appears as nonlinear SU(2) magnetic energy. Gravitation and electromagnetism are unified giving Einstein's equation and a geometric energy momentum tensor. A solution energy in the newtonian limit gives the gravitational constant G. Outside of this limit G is variable. May be interpreted as dark matter or energy. In vacuum, known gravitational solutions are obtained. Electromagnetism is an SU(2) subgroup. A U(1) limit gives Maxwell's equations. Geometric fields determine a generalized Dirac equation and are the germ of quantum physics. Planck's h and of Einstein's c are given by the potential and the metric. Excitations have quanta of charge, flux and spin determining the FQHE. There are only three stable 1/2 spin fermions. Mass is a form of energy. The rest energies of the fermions give the proton/electron mass ratio. Potential excitations have energies equal to the weak boson masses allowing a geometric interpretation of Weinberg's angle. SU(2) gives the anomalous magnetic moments of proton, electron, neutron and generates nuclear range attractive potentials strong enough to produce the binding energies of the deuteron and other nuclides. Lepton and meson masses are due to topological excitations. The geometric mass spectrum is satisfactory. The proton has a triple structure. The alpha constant is a geometric number.

Gustavo R Gonzalez-Martin

2010-07-19T23:59:59.000Z

456

Argonne Physics Division - Theory Group  

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

Group Staff Ian C. Clot Henning Esbensen Lucas Platter Craig D. Roberts Robert B. Wiringa Postdoctoral Fellows Alessandro Lovato Mario Pitschmann Joint with UWisconsin-Madison...

457

Argonne Physics Division - Theory Group  

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

Administration Secretary: Debbie Morrison EMail: morrison@anl.gov Phone: 630252-4100 Fax: 630252-3903 Address: Theory Group Physics Division, Building 203 Argonne National...

458

Argonne Physics Division - Theory Group  

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

23rd Annual Midwest Theory Get-Together 2010 Theory Group Theoretical research in Argonne's Physics Division addresses a broad range of problems involving the stucture and dynamics...

459

Electronics, Lighting and Networks Group  

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

Electronics, Lighting and Networks Group NOTICE Due to the current lapse of federal funding, Berkeley Lab websites are accessible, but may not be updated until Congress approves...

460

Martifer Group | Open Energy Information  

Open Energy Info (EERE)

Martifer Group Place Oliveira de Frades, Portugal Zip 3684-001 Sector Biofuels, Solar, Wind energy Product Portugal-based company divided across four core business units including...

Note: This page contains sample records for the topic "group weak interactions" 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

Bazan Group | Open Energy Information  

Open Energy Info (EERE)

to: navigation, search Name Bazan Group Place Pontal, Brazil Zip 14180-000 Product Bioethanol production company Coordinates -21.023149, -48.037099 Loading map......

462

Transuranic Waste Transportation Working Group Agenda | Department...  

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

Transportation Working Group Agenda Transuranic Waste Transportation Working Group Agenda Transuranic Waste Transportation Working Group Agenda More Documents & Publications...

463

Employee Resource Groups | Department of Energy  

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

Services Diversity and Inclusion Employee Resource Groups Employee Resource Groups Diversity and Inclusion Employee Resource Groups Related Documents Special Emphasis...

464

Two-dimensional weak anti-localization in Bi{sub 2}Te{sub 3} thin film grown on Si(111)-(7 Multiplication-Sign 7) surface by molecular beam epitaxy  

SciTech Connect

We report on low temperature transport studies of Bi{sub 2}Te{sub 3} topological insulator thin films grown on Si(111)-(7 Multiplication-Sign 7) surface by molecular beam epitaxy. A sharp increase in the magnetoresistance with magnetic field at low temperature indicates the existence of weak anti-localization. The measured weak anti-localization effect agrees well with the Hikami-Larkin-Nagaoka model, and the extracted phase coherence length shows a power-law dependence with temperature indicating the existence of a two-dimensional system. An insulating ground state has also been observed at low temperature showing a logarithmic divergence of the resistance that appears to be the influence of electron-electron interaction in a two-dimensional system.

Roy, Anupam; Guchhait, Samaresh; Sonde, Sushant; Dey, Rik; Pramanik, Tanmoy; Rai, Amritesh; Movva, Hema C. P.; Banerjee, Sanjay K. [Microelectronics Research Center, The University of Texas at Austin, Austin, Texas 78758 (United States)] [Microelectronics Research Center, The University of Texas at Austin, Austin, Texas 78758 (United States); Colombo, Luigi [Texas Instruments, 12500 TI Boulevard, Dallas, Texas 75266 (United States)] [Texas Instruments, 12500 TI Boulevard, Dallas, Texas 75266 (United States)

2013-04-22T23:59:59.000Z

465

Research documentation per participating group  

E-Print Network (OSTI)

Research documentation per participating group #12;#12;Annual Report Engineering Mechanics 2008 2/Department Eindhoven University of Technology Department of Mechanical Engineering 2. Subprogrammes related to research the activities of the previous EM groups "TU/e ­ Dynamics and Control Technology" and "TU/e ­ Systems Engineering

Franssen, Michael

466

Evolution of Persistent Wave Groups  

Science Conference Proceedings (OSTI)

During the near-field leg of the Hawaiian Ocean-Mixing Experiment (HOME-NF), short, steep surface wave groups were observed that elicited strong group-forced responses in the wave-filtered surface current field, as reported by Smith. Some of ...

Jerome A. Smith; Coralie Brulefert

2010-01-01T23:59:59.000Z

467

Gauge theory and group representations  

SciTech Connect

The mathematical foundations of gauge theories based on indecomposable representations of space-time symmetry groups are investigated. In particular, twistors and singletons are given a uniform treatment as gauge theories of this type. This is a step toward geometrically unifying all representation based gauge theories. In addition, some implications with respect to the geometric construction of group representations are noted.

Nakashima, M.M.

1988-01-01T23:59:59.000Z

468

Group Members-Surface Electrochemistry and Electrocatalysis (SEE) Group |  

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

Group Members Group Members Principal Investigators Radoslav Adzic (Group Leader) Surface electrochemistry, Electrocatalysis, Direct energy conversion, Fuel cells Jia Wang Surface electrochemistry, Electrocatalysis, Nano-synthesis, Structural characterization using XRD, TEM, and SEM, Fuel cells and water electrolysis Miomir Vukmirovic To advance fuel cell electrocatalysts for higher activity and improved durability, and for lower cost through reduced Pt loading. Investigation of single crystal model systems for fundamental understanding and structured nanoparticle electrocatalysts for applications. Development of Pt monolayer core-shell electrocatalysts for the cathode (oxygen reduction reaction). Kotaro Sasaki Electrocatalysis, fuel cells and water splitting, Direct energy conversion, Nanotechnology, Nanomaterial characterization by in situ XAS and XRD, Surface modifications by electrochemical methods

469

Preheating ablation effects on the Rayleigh-Taylor instability in the weakly nonlinear regime  

SciTech Connect

The two-dimensional Rayleigh-Taylor instability (RTI) with and without thermal conduction is investigated by numerical simulation in the weakly nonlinear regime. A preheat model {kappa}(T)={kappa}{sub SH}[1+f(T)] is introduced for the thermal conduction [W. H. Ye, W. Y. Zhang, and X. T. He, Phys. Rev. E 65, 057401 (2002)], where {kappa}{sub SH} is the Spitzer-Haerm electron thermal conductivity coefficient and f(T) models the preheating tongue effect in the cold plasma ahead of the ablation front. The preheating ablation effects on the RTI are studied by comparing the RTI with and without thermal conduction with identical density profile relevant to inertial confinement fusion experiments. It is found that the ablation effects strongly influence the mode coupling process, especially with short perturbation wavelength. Overall, the ablation effects stabilize the RTI. First, the linear growth rate is reduced, especially for short perturbation wavelengths and a cutoff wavelength is observed in simulations. Second, the second harmonic generation is reduced for short perturbation wavelengths. Third, the third-order negative feedback to the fundamental mode is strengthened, which plays a stabilization role. Finally, on the contrary, the ablation effects increase the generation of the third harmonic when the perturbation wavelengths are long. Our simulation results indicate that, in the weakly nonlinear regime, the ablation effects are weakened as the perturbation wavelength is increased. Numerical results obtained are in general agreement with the recent weakly nonlinear theories as proposed in [J. Sanz, J. Ramirez, R. Ramis et al., Phys. Rev. Lett. 89, 195002 (2002); J. Garnier, P.-A. Raviart, C. Cherfils-Clerouin et al., Phys. Rev. Lett. 90, 185003 (2003)].

Wang, L. F. [SMCE, China University of Mining and Technology, Beijing 100083 (China); CAPT, Peking University, Beijing 100871 (China) and LCP, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Department of Mathematics, Hong Kong Baptist University, Kowloon Tong (Hong Kong); Ye, W. H.; He, X. T. [CAPT, Peking University, Beijing 100871 (China) and LCP, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Department of Physics, Zhejiang University, Hangzhou 310027 (China); Sheng, Z. M. [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190 (China) and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China); Don, Wai-Sun [Department of Mathematics, Hong Kong Baptist University, Kowloon Tong (Hong Kong); Li, Y. J. [SMCE, China University of Mining and Technology, Beijing 100083 (China)

2010-12-15T23:59:59.000Z

470

A Precision Measurement of the Weak Mixing Angle in Moller Scattering at Low Q^2  

DOE Green Energy (OSTI)

The electroweak theory has been probed to a high level of precision at the mass scale of the Z{sup 0} through the joint contributions of LEP at CERN and the SLC at SLAC. The E158 experiment at SLAC complements these results by measuring the weak mixing angle at a Q{sup 2} of 0.026 (GeV/c){sup 2}, far below the weak scale. The experiment utilizes a 48 GeV longitudinally polarized electron beam on unpolarized atomic electrons in a target of liquid hydrogen to measure the parity-violating asymmetry A{sup PV} in Moeller scattering. The tree-level prediction for A{sup PV} is proportional to 1-4 sin{sup 2} {theta}{sub W}. Since sin{sup 2} {theta}{sub W} {approx} 0.25, the effect of radiative corrections is enhanced, allowing the E158 experiment to probe for physics effects beyond the Standard Model at the TeV scale. This work presents the results from the first two physics runs of the experiment, covering data collected in the year 2002. The parity-violating asymmetry A{sup PV} was measured to be A{sup PV} = -158 ppb {+-} 21 ppb (stat) {+-} 17 ppb (sys). The result represents the first demonstration of parity violation in Moeller scattering. The observed value of A{sup PV} corresponds to a measurement of the weak mixing angle of sin{sup 2} {theta}{sub W}{sup eff} = 0.2380 {+-} 0.0016(stat) {+-} 0.0013(sys), which is in good agreement with the theoretical prediction of sin{sup 2} {theta}{sub W}{sup eff} = 0.2385 {+-} 0.0006 (theory).

Jones, G.

2005-01-28T23:59:59.000Z

471

THE HIGGS WORKING GROUP: SUMMARY REPORT.  

SciTech Connect

This working group has investigated Higgs boson searches at the Tevatron and the LHC. Once Higgs bosons are found their properties have to be determined. The prospects of Higgs coupling measurements at the LHC and a high-energy linear e{sup +}e{sup -} collider are discussed in detail within the Standard Model and its minimal supersymmetric extension (MSSM). Recent improvements in the theoretical knowledge of the signal and background processes are presented and taken into account. The residual uncertainties are analyzed in detail. Theoretical progress is discussed in particular for the gluon-fusion processes gg {yields} H(+j), Higgs-bremsstrahlung off bottom quarks and the weak vector-boson-fusion (VBF) processes. Following the list of open questions of the last Les Houches workshop in 2001 several background processes have been calculated at next-to-leading order, resulting in a significant reduction of the theoretical uncertainties. Further improvements have been achieved for the Higgs sectors of the MSSM and NMSSM. This report summarizes our work performed before and after the workshop in Les Houches. Part A describes the theoretical developments for signal and background processes. Part B presents recent progress in Higgs boson searches at the Tevatron collider. Part C addresses the determination of Higgs boson couplings, part D the measurement of tan {beta} and part E Higgs boson searches in the VBF processes at the LHC. Part F summarizes Higgs searches in supersymmetric Higgs decays, part G photonic Higgs decays in Higgs-strahlung processes at the LHC, while part H concentrates on MSSM Higgs bosons in the intense-coupling regime at the LHC. Part I presents progress in charged Higgs studies and part J the Higgs discovery potential in the NMSSM at the LHC. The last part K describes Higgs coupling measurements at a 1 TeV linear e{sup +}e{sup -} collider.

DAWSON, S.; ET AL.

2005-08-01T23:59:59.000Z

472

FACT SHEET: BIOENERGY WORKING GROUP  

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

, 2010 , 2010 1 FACT SHEET: BIOENERGY WORKING GROUP At the Clean Energy Ministerial in Washington, D.C. on July 19 th and 20 th , ministers launched a Bioenergy Working Group, which will advance the deployment of bioenergy technologies by implementing recommendations of the Technology Action Plan on Bioenergy Technologies that was released by the Major Economies Forum Global Partnership in December 2009. The Working Group will work in close cooperation with the Global Bioenergy Partnership (GBEP), which is co-chaired by Brazil and Italy. Initial key activities of the Working Group include: 1. Global Bioenergy Atlas: The Working Group will combine and build upon existing databases of sustainably-developed bioenergy potential around the globe and make it available in an open web-

473

Richway Group | Open Energy Information  

Open Energy Info (EERE)

Richway Group Richway Group Jump to: navigation, search Logo: Richway Group Name Richway Group Address 105 - 12031 Horseshoe Way Place Richmond, British Columbia Zip V7A 4V4 Sector Biomass Website http://www.richwaygroup.com Coordinates 49.163469°, -123.137766° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":49.163469,"lon":-123.137766,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

474

Focus Groups | Department of Energy  

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

Outreach & Collaboration » Focus Groups Outreach & Collaboration » Focus Groups Focus Groups A forum for interface between union worker representatives and senior DOE managers and stakeholders to address key issues and concerns from worker perspectives, share information regarding HSS activities and programs, and identify potential opportunities to work together to improve worker health and safety at DOE sites. Learn more about the HSS Focus Groups... Labor Management Meetings and Activities HSS provides forums for communication between labor and management related to worker health, safety and security improvements across the DOE complex. 10 CFR 851 Worker Safety and Health Program The 10 C.F.R. 851 Work Group promotes excellence in the implementation of 10 C.F.R. 851, "Worker Safety and Health" and continuous improvement in the

475

Experimental verification of Boltzmann equilibrium for negative ions in weakly collisional electronegative plasmas  

Science Conference Proceedings (OSTI)

Weakly collisional Ar-O{sub 2} electronegative plasmas are investigated in a dc multidipole chamber. An electronegative core and an electropositive halo are observed. The density ratio of negative ions to electrons ({alpha}) in the nondrifting bulk is found to be 0.43. The profile of {alpha} is found using both the phase velocity of ion acoustic waves and the drift velocity of positive ions determined by laser-induced fluorescence. The experiment shows that negative ions are in Boltzmann equilibrium with a temperature of 0.06{+-}0.02 eV. Double layers are not found separating the electronegative core and the electropositive halo.

Ghim, Young-chul [Department of Physics, University of Oxford, Oxford OX1 3NP (United Kingdom); Hershkowitz, Noah [Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)

2009-04-13T23:59:59.000Z

476

Direct observation of dynamics of single spinning dust grains in weakly magnetized complex plasma  

SciTech Connect

The rotational dynamics of single dust grains in a weak magnetic field is investigated on a kinetic level. Experiments reveal spin-up of spherical dust grains and alignment of their magnetic moments parallel to the magnetic induction vector. The angular velocity of spinning prolate grains varies as magnetic induction increases to 250 G. Spinning dust grains are found to flip over only when the magnetic field magnitude is changing. The results demonstrate that dusty plasma has paramagnetic properties. Qualitative interpretations are proposed to explain newly discovered phenomena.

Dzlieva, E. S.; Karasev, V. Yu., E-mail: plasmadust@yandex.ru [St. Petersburg State University, Institute of Physics (Russian Federation); Petrov, O. F. [Russian Academy of Sciences, Institute for High Energy Densities, Joint Institute for High Temperatures (Russian Federation)

2012-01-15T23:59:59.000Z

477

Extensive escape rate in lattices of weakly coupled expanding maps with holes  

E-Print Network (OSTI)

This paper discusses possible approaches to the escape rate in infinite lattices of weakly coupled maps with uniformly expanding repeller. It is proved that computed-via-volume rates of spatially periodic approximations grow linearly with the period size, suggesting normalized escape rate as the appropriate notion for the infinite system. The proof relies on symbolic dynamics and is based on the control of cumulative effects of perturbations within cylinder sets. A piecewise affine diffusive example is presented that exhibits monotonic decay of the escape rate with coupling intensity.

Jean-Baptiste Bardet; Bastien Fernandez

2010-06-29T23:59:59.000Z

478

Extensive escape rate in lattices of weakly coupled expanding maps with holes  

E-Print Network (OSTI)

This paper discusses possible approaches to the escape rate in infinite lattices of weakly coupled maps with uniformly expanding repeller. It is proved that computed-via-volume rates of spatially periodic approximations grow linearly with the period size, suggesting normalized escape rate as the appropriate notion for the infinite system. The proof relies on symbolic dynamics and is based on the control of cumulative effects of perturbations within cylinder sets. A piecewise affine diffusive example is presented that exhibits monotonic decay of the escape rate with coupling intensity.

Bardet, Jean-Baptiste

2010-01-01T23:59:59.000Z

479

Negative Off-Diagonal Conductivities in a Weakly Coupled Quark Gluon Plasma  

E-Print Network (OSTI)

We calculate the conductivity matrix of a weakly coupled quark-gluon plasma at the leading-log order. By setting all quark chemical potentials to be identical, the diagonal conductivities become degenerate and positive, while the off-diagonal ones become degenerate but negative (or zero when the chemical potential vanishes). This means a potential gradient of a certain fermion flavor can drive backward currents of other flavors. A simple explanation is provided for this seemingly counter intuitive phenomenon. It is speculated that this phenomenon is generic and most easily measured in cold atom experiments.

Jiunn-Wei Chen; Yen-Fu Liu; Shi Pu; Yu-Kun Song; Qun Wang

2013-08-13T23:59:59.000Z

480

Negative Off-Diagonal Conductivities in a Weakly Coupled Quark Gluon Plasma  

E-Print Network (OSTI)

We calculate the conductivity matrix of a weakly coupled quark-gluon plasma at the leading-log order. By setting all quark chemical potentials to be identical, the diagonal conductivities become degenerate and positive, while the off-diagonal ones become degenerate but negative (or zero when the chemical potential vanishes). This means a potential gradient of a certain fermion flavor can drive backward currents of other flavors. A simple explanation is provided for this seemingly counter intuitive phenomenon. It is speculated that this phenomenon is generic and most easily measured in cold atom experiments.

Chen, Jiunn-Wei; Pu, Shi; Song, Yu-Kun; Wang, Qun

2013-01-01T23:59:59.000Z

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481

An Einstein-like theory of gravity with a non-newtonian weak-field limit  

E-Print Network (OSTI)

We propose a model describing Einstein gravity coupled to a scalar field with an exponential potential. We show that the weak-field limit of the model has static solutions given by a gravitational potential behaving for large distances as \\ln r . The Newtonian term GM/r appears only as subleading. Our model can be used to give a phenomenological explanation of the rotation curves of the galaxies without postulating the presence of dark matter. This can be achieved only by giving up at galactic scales Einstein equivalence principle.

Mariano Cadoni

2003-12-09T23:59:59.000Z

482

Dynamic performance of a STATCON at an HVDC inverter feeding a very weak AC system  

SciTech Connect

This paper investigates the dynamic performance of the advanced static var compensator or STATCON at a high voltage direct current (HVDC) converter terminal where the ac system has a very low short circuit ratio (SCR). The STATCON is based on a nine-level GTO thyristor inverter. The studies include operating characteristics of the STATCON under various ac and dc disturbances. The simulation results are compared with other types of reactive power compensation options available for such applications. It is shown that the STATCON has clear advantages over the other compensators, in areas such as; fault response time, voltage support ability, and dc recovery, while operating with very weak ac systems.

Zhuang, Y.; Menzies, R.W. [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Nayak, O.B. [HVDC Research Centre, Winnipeg, Manitoba (Canada); Turanli, H.M. [Manitoba Hydro, Winnipeg, Manitoba (Canada)

1996-04-01T23:59:59.000Z

483

Superflow in a Toroidal Bose-Einstein Condensate: An Atom Circuit with a Tunable Weak Link  

SciTech Connect

We have created a long-lived ({approx_equal}40 s) persistent current in a toroidal Bose-Einstein condensate held in an all-optical trap. A repulsive optical barrier across one side of the torus creates a tunable weak link in the condensate circuit, which can affect the current around the loop. Superflow stops abruptly at a barrier strength such that the local flow velocity at the barrier exceeds a critical velocity. The measured critical velocity is consistent with dissipation due to the creation of vortex-antivortex pairs. This system is the first realization of an elementary closed-loop atom circuit.

Ramanathan, A.; Wright, K. C.; Muniz, S. R.; Zelan, M.; Hill, W. T. III; Lobb, C. J.; Helmerson, K.; Phillips, W. D.; Campbell, G. K. [Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland, Gaithersburg, Maryland, 20899 (United States)

2011-04-01T23:59:59.000Z

484

Determination of the Axial-Vector Weak Coupling Constant with Polarized Ultracold Neutrons  

E-Print Network (OSTI)

A precise measurement of the neutron decay $\\beta$-asymmetry $A_0$ has been carried out using polarized ultracold neutrons (UCN) from the pulsed spallation UCN source at the Los Alamos Neutron Science Center (LANSCE). Combining data obtained in 2008 and 2009, we report $A_0 = -0.11966 \\pm 0.00089 _{-0.00140}^{+0.00123}$, from which we determine the ratio of the axial-vector to vector weak coupling of the nucleon $g_A/g_V = -1.27590 _{-0.00445}^{+0.00409}$.

Liu, J; Holley, A T; Back, H O; Bowles, T J; Broussard, L J; Carr, R; Clayton, S; Currie, S; Filippone, B W; Garcia, A; Geltenbort, P; Hickerson, K P; Hoagland, J; Hogan, G E; Hona, B; Ito, T M; Liu, C -Y; Makela, M; Mammei, R R; Martin, J W; Melconian, D; Morris, C L; Pattie, R W; Galvan, A Perez; Pitt, M L; Plaster, B; Ramsey, J C; Rios, R; Russell, R; Saunders, A; Seestrom, S; Sondheim, W E; Tatar, E; Vogelaar, R B; VornDick, B; Wrede, C; Yan, H; Young, A R

2010-01-01T23:59:59.000Z

485

Determination of the Axial-Vector Weak Coupling Constant with Ultracold Neutrons  

E-Print Network (OSTI)

A precise measurement of the neutron decay $\\beta$-asymmetry $A_0$ has been carried out using polarized ultracold neutrons (UCN) from the pulsed spallation UCN source at the Los Alamos Neutron Science Center (LANSCE). Combining data obtained in 2008 and 2009, we report $A_0 = -0.11966 \\pm 0.00089_{-0.00140}^{+0.00123}$, from which we determine the ratio of the axial-vector to vector weak coupling of the nucleon $g_A/g_V = -1.27590_{-0.00445}^{+0.00409}$.

UCNA Collaboration; J. Liu; M. P. Mendenhall; A. T. Holley; H. O. Back; T. J. Bowles; L. J. Broussard; R. Carr; S. Clayton; S. Currie; B. W. Filippone; A. Garcia; P. Geltenbort; K. P. Hickerson; J. Hoagland; G. E. Hogan; B. Hona; T. M. Ito; C. -Y. Liu; M. Makela; R. R. Mammei; J. W. Martin; D. Melconian; C. L. Morris; R. W. Pattie Jr.; A. Perez Galvan; M. L. Pitt; B. Plaster; J. C. Ramsey; R. Rios; R. Russell; A. Saunders; S. J. Seestrom; W. E. Sondheim; E. Tatar; R. B. Vogelaar; B. VornDick; C. Wrede; H. Yan; A. R. Young

2010-07-22T23:59:59.000Z

486

Determination of the Axial-Vector Weak Coupling Constant with Ultracold Neutrons  

Science Conference Proceedings (OSTI)

A precise measurement of the neutron decay {beta} asymmetry A{sub 0} has been carried out using polarized ultracold neutrons from the pulsed spallation ultracold neutron source at the Los Alamos Neutron Science Center. Combining data obtained in 2008 and 2009, we report A{sub 0}=-0.119 66{+-}0.000 89{sub -0.00140}{sup +0.00123}, from which we determine the ratio of the axial-vector to vector weak coupling of the nucleon g{sub A}/g{sub V}=-1.275 90{sub -0.00445}{sup +0.00409}.

Liu, J. [Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125 (United States); Department of Physics, Shanghai Jiao Tong University, Shanghai, 200240 (China); Mendenhall, M. P.; Carr, R.; Filippone, B. W.; Hickerson, K. P.; Perez Galvan, A.; Russell, R. [Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125 (United States); Holley, A. T.; Hoagland, J.; VornDick, B. [Department of Physics, North Carolina State University, Raleigh, North Carolina 27695 (United States); Back, H. O.; Pattie, R. W. Jr.; Young, A. R. [Department of Physics, North Carolina State University, Raleigh, North Carolina 27695 (United States); Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708 (United States); Bowles, T. J.; Clayton, S.; Currie, S.; Hogan, G. E.; Ito, T. M.; Makela, M.; Morris, C. L. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2010-10-29T23:59:59.000Z

487

Distillation of free entanglement from bound entangled states using weak measurements  

E-Print Network (OSTI)

We propose a scheme for distillation of free bipartite entanglement from bipartite bound-entangled states. The crucial element of our scheme is an ancillary system that is coupled to the initial bound-entangled state via appropriate weak measurements. We show that in this protocol free entanglement can be always generated with nonzero probability by using a single copy of the bound-entangled state. We also derive a lower bound on the entanglement cost of the protocol, and conclude that, on average, applying weaker measurements results in relatively higher values of free entanglement as well as lower costs.

S. Baghbanzadeh; A. T. Rezakhani

2013-09-11T23:59:59.000Z

488

Ground state cooling of a nanomechanical resonator in the weak-confinement regime via quantum interference  

E-Print Network (OSTI)

Ground state cooling of a nanomechanical resonator coupled to a superconducting flux qubit is discussed. We show that by inducing quantum interference to cancel detrimental carrier excitations, ground state cooling becomes possible in the weak-confinement or non-resolved regime. The qubit is modelled as a three-level system in lambda configuration, and the driving fluxes are applied such that the qubit absorption spectrum exhibits electromagnetically induced transparency, thereby cancelling the unwanted carrier excitation. As our interference-based scheme allows to apply strong cooling fields, fast and efficient cooling can be achieved.

Xia, K

2009-01-01T23:59:59.000Z

489

Ground state cooling of a nanomechanical resonator in the weak-confinement regime via quantum interference  

E-Print Network (OSTI)

Ground state cooling of a nanomechanical resonator coupled to a superconducting flux qubit is discussed. We show that by inducing quantum interference to cancel detrimental carrier excitations, ground state cooling becomes possible in the weak-confinement or non-resolved regime. The qubit is modelled as a three-level system in lambda configuration, and the driving fluxes are applied such that the qubit absorption spectrum exhibits electromagnetically induced transparency, thereby cancelling the unwanted carrier excitation. As our interference-based scheme allows to apply strong cooling fields, fast and efficient cooling can be achieved.

K. Xia; J. Evers

2009-02-23T23:59:59.000Z

490

TEC Working Group Topic Groups Manual Review | Department of Energy  

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

Manual Review Manual Review TEC Working Group Topic Groups Manual Review This group is responsible for the update of DOE Manual 460.2-1, Radioactive Material Transportation Practices Manual. This manual was issued on September 23, 2002, and establishes a set of standard transportation practices for U.S. Department of Energy (DOE) programs to use in planning and executing offsite shipments of radioactive materials including radioactive waste. The manual was developed in response to recommendations from various DOE programs and external stakeholders. A writing group was convened to evaluate the shipping practices being used or planned for use throughout the Department, document them, and, where appropriate, standardize them. The results of this effort are reflected

491

TEC Working Group Topic Groups Rail | Department of Energy  

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

Rail Rail TEC Working Group Topic Groups Rail The Rail Topic Group has the responsibility to identify and discuss current issues and concerns regarding rail transportation of radioactive materials by the Department of Energy (DOE). The group's current task is to examine different aspects of rail transportation including inspections, tracking and radiation monitoring, planning and process, and review of lessons learned. Ultimately, the main goal for members will be to assist in the identification of potential rail routes for shipments to Yucca Mountain, in a manner that will contribute to a safe, dynamic, and flexible transportation system. The identification of potential routes from reactor sites and DOE facilities will serve as an important first step in transportation planning, examining alternative routes, and getting feedback

492

TEC Working Group Topic Groups Routing | Department of Energy  

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

Routing Routing TEC Working Group Topic Groups Routing ROUTING The Routing Topic Group has been established to examine topics of interest and relevance concerning routing of shipments of spent nuclear fuel (SNF) and high-level radioactive waste (HLW) to a national repository at Yucca Mountain, Nevada by highway, rail, and intermodal operations that could involve use of barges. Ultimately, the main goal for the topic group members will be to provide stakeholder perspectives and input to the Office of Logistics Management (OLM) in the Department of Energy's (DOE) Office of Civilian Radioactive Waste Management (OCRWM) for the identification of a national suite of routes to Yucca Mountain. The identification of a suite of routes will provide an advanced planning framework for State and Tribal

493

A simple proof of orientability in colored group field theory  

E-Print Network (OSTI)

In this short note we use results from the theory of crystallizations to prove that color in group field theories garantees orientability of the piecewise linear pseudo-manifolds associated to each graph generated perturbatively. The origin of orientability is the presence of two interaction vertices.

Francesco Caravelli

2010-12-18T23:59:59.000Z

494

A multi-actor spatio-temporal interaction model used to geosimulate the zoonosis propagation (WIP)  

Science Conference Proceedings (OSTI)

Several approaches and models have been proposed to simulate the spread of infectious diseases such as West Nile virus (WNV) or Lyme disease. However, these models such as mathematical models have some weaknesses when trying to simulate the influence ... Keywords: GeoSimulation, decision support systems, spatio-temporal interactions, spread of infectious diseases

Mondher Bouden; Bernard Moulin

2012-03-01T23:59:59.000Z

495

Simplicity in interaction design  

Science Conference Proceedings (OSTI)

Attaining simplicity is a key challenge in interaction design. Our approach relies on a minimalist design exercise to explore the communication capacity for interaction components. This approach results in expressive design solutions, useful perspectives ... Keywords: expressiveness, interface design, simplicity, usability