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1

National Magnetic Anomaly Map  

DOE Green Energy (OSTI)

A record of the conclusions of a three-day meeting and workshop of the Committee for a National Magnetic Anomaly Map held in February 1976 is presented. The purpose of he workshop was to prepare a statement of the benefits, objectives, specifications, and requirements of a NMAM and establish a working plan for producing the map. (ACR)

Not Available

1976-01-01T23:59:59.000Z

2

Neutrino magnetic moment in a magnetized plasma  

E-Print Network (OSTI)

The contribution of a magnetized plasma to the neutrino magnetic moment is calculated. It is shown that only part of the additional neutrino energy in magnetized plasma connecting with its spin and magnetic field strength defines the neutrino magnetic moment. It is found that the presence of magnetized plasma does not lead to the considerable increase of the neutrino magnetic moment in contrast to the results presented in literature previously.

N. V. Mikheev; E. N. Narynskaya

2010-11-08T23:59:59.000Z

3

Moment free toroidal magnet  

DOE Patents (OSTI)

A toroidal magnet for confining a high magnetic field for use in fusion reactor research and nuclear particle detection. The magnet includes a series of conductor elements arranged about and fixed at its small major radius portion to the outer surface of a central cylindrical support each conductor element having a geometry such as to maintain the conductor elements in pure tension when a high current flows therein, and a support assembly which redistributes all or part of the tension which would otherwise arise in the small major radius portion of each coil element to the large major radius portion thereof.

Bonanos, Peter (East Brunswick, NJ)

1983-01-01T23:59:59.000Z

4

Electric Dipole Moment of Magnetic Monopole  

E-Print Network (OSTI)

The electric dipole moment of magnetic monopoles with spin is studied in the N=2 supersymmetric gauge theory. The dipole moments of the electric charge distributions, as well as the dipole moments due to the magnetic currents, are calculated. The contribution of charge distribution of the fermion to the gyroelectric ratio is expressed by using zeta(3).

Makoto Kobayashi

2006-12-26T23:59:59.000Z

5

Nucleon Magnetic Moments and Electric Polarizabilities  

SciTech Connect

Electromagnetic properties of the nucleon are explored with lattice QCD using a novel technique. Focusing on background electric fields, we show how the electric polarizability can be extracted from nucleon correlation functions. A crucial step concerns addressing contributions from the magnetic moment, which affects the relativistic propagation of nucleons in electric fields. By properly handing these contributions, we can determine both magnetic moments and electric po larizabilities. Lattice results from anisotropic clover lattices are presented. Our method is not limited to the neutron; we show results for the proton as well.

W Detmold, B C Tiburzi, A Walker-Loud

2010-06-01T23:59:59.000Z

6

Anomaly of the moment of inertia of shape transitional nuclei  

Science Conference Proceedings (OSTI)

The change in the structure of the collective levels with spin angular momentum in atomic nuclei is often expressed in terms of the classical concepts of the kinematic and the dynamic moments of inertia varying with spin. For the well deformed even-even nuclei the kinematic moment of inertia increases with spin up to 10%-20%, at say I{sup {pi}} = 12{sup +}. However, for the shape transitional nuclei, or almost spherical nuclei, it increases with spin much faster. The pitfalls of using the rotor model form of kinematic moment of inertia in such cases are pointed out here. Alternative methods of extracting the nuclear structure information are explored. The important role of the ground state deformation is illustrated. The use of the power index formula for evaluating the effective moment of inertia, free from the assumption of the rotor model, is described.

Gupta, J. B. [Ramjas College, University of Delhi, Delhi-110 007 (India); Hamilton, J. H. [Physics Department, Vanderbilt University, Nashville, Tennessee 37235 (United States)

2011-06-15T23:59:59.000Z

7

Nuclear magnetic moments and related sum rules  

SciTech Connect

We first review the history and our present understanding of nuclear magnetic moments and Gamow-Teller transitions, with emphasis on the roles of configuration mixing and meson exchange currents. Then we discuss the renormalization of the orbital g-factor in nuclei, and its relation to the E1 sum rule for photoabsorption and the M1 sum rule for the scissors mode of deformed nuclei.

Bentz, Wolfgang [Department of Physics, School of Science, Tokai University, Hiratsuka-shi, Kanagawa 259-1292 (Japan); Arima, Akito [Musashi University, 1-26-1 Toyotama-kami, Nerima-ku, Tokyo 176-8534 (Japan)

2011-05-06T23:59:59.000Z

8

Determination of the Delta++ magnetic dipole moment  

E-Print Network (OSTI)

We study the elastic and radiative pi+ p scattering within a full dynamical model which incorporates the finite width effects of the Delta++. The scattering amplitudes are invariant under contact transformations of the spin 3/2 field and gauge-invariance is fulfilled for the radiative case. The pole parameters of the Delta++ obtained from the elastic cross section are m_Delta = 1211.2 \\pm 0.4 MeV and Gamma_Delta = 88.2 \\pm 0.4 MeV. From a fit to the most sensitive observables in radiative pi+ p scattering, we obtain mu_Delta = 6.14 \\pm 0.51 e/2m_p for the magnetic dipole moment of the Delta++.

G. Lopez Castro; A. Mariano

2000-06-16T23:59:59.000Z

9

Ground State Magnetic Moments of Mirror Nuclei Studied at NSCL  

E-Print Network (OSTI)

Progress in the measurement of the ground state magnetic moments of mirror nuclei at NSCL is presented. The systematic trend of the spin expectation value $$ and the linear behavior of $\\gamma_p$ versus $\\gamma_n$, both extracted from the magnetic moments of mirror partners, are updated to include all available data.

P. F. Mantica; K. Minamisono

2009-01-22T23:59:59.000Z

10

Magnetic moments of T=3/2 mirror pairs  

Science Conference Proceedings (OSTI)

We predict values of the magnetic moments of T=3/2 proton-rich fp-shell nuclei in the mass range A=43-53, by using known values for their neutron-rich mirrors together with shell-model estimates for small quantities. We extend the analysis to those T=3/2 sd-shell mirror pairs for which both the T{sub z}=-3/2 and T{sub z}=+3/2 magnetic moments have been measured. We find that these obey the same linear relation as previously deduced for T=1/2 mirror pairs.

Perez, S. M. [Department of Physics, University of Cape Town, Private Bag, Rondebosch 7700 (South Africa); iThemba LABS, P. O. Box 722, Somerset West 7129 (South Africa); Richter, W. A. [Department of Physics, University of the Western Cape, Private Bag X17, Bellville 7535 (South Africa); Brown, B. A. [Department of Physics and Astronomy, and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321 (United States); Horoi, M. [Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859 (United States)

2010-12-15T23:59:59.000Z

11

Anomalous magnetic moment of an electron near a dispersive surface  

E-Print Network (OSTI)

Changes in the magnetic moment of an electron near a dielectric or conducting surface due to boundary-dependent radiative corrections are investigated. The electromagnetic field is quantized by normal mode expansion for a non-dispersive dielectric and an undamped plasma, but the electron is described by the Dirac equation without matter-field quantization. Perturbation theory in the Dirac equation leads to a general formula for the magnetic moment shift in terms of integrals over products of electromagnetic mode functions. In each of the models investigated contour integration techniques over a complex wave vector can be used to derive a general formula featuring just integrals over transverse electric and transverse magnetic reflection coefficients of the surface. Analysis of the magnetic moment shift for several classes of materials yields markedly different results from the previously considered simplistic 'perfect reflector' model, due to the inclusion of physically important features of the electromagnetic response of the surface such as evanescent field modes and dispersion in the material. For a general dispersive dielectric surface, the magnetic moment shift of a nearby electron can exceed the previous prediction of the perfect-reflector model by several orders of magnitude.

Robert Bennett; Claudia Eberlein

2013-04-04T23:59:59.000Z

12

Apparatus for detecting a magnetic anomaly contiguous to remote location by squid gradiometer and magnetometer systems  

DOE Patents (OSTI)

A superconducting quantum interference device (SQUID) magnetic detection apparatus detects magnetic fields, signals, and anomalies at remote locations. Two remotely rotatable SQUID gradiometers may be housed in a cryogenic environment to search for and locate unambiguously magnetic anomalies. The SQUID magnetic detection apparatus can be used to determine the azimuth of a hydrofracture by first flooding the hydrofracture with a ferrofluid to create an artificial magnetic anomaly therein.

Overton, Jr., William C. (Los Alamos, NM); Steyert, Jr., William A. (Los Alamos, NM)

1984-01-01T23:59:59.000Z

13

Neutrino magnetic moments, flavor mixing, and the SuperKamiokande solar data  

E-Print Network (OSTI)

We find that magnetic neutrino-electron scattering is unaffected by oscillations for vacuum mixing of Dirac neutrinos with only diagonal moments and for Majorana neutrinos with two flavors. For MSW mixing, these cases again obtain, though the effective moments can depend on the neutrino energy. Thus, e.g., the magnetic moments measured with $\\bar{\

J. F. Beacom; P. Vogel

1999-07-16T23:59:59.000Z

14

Atomic ionization of germanium due to neutrino magnetic moments  

E-Print Network (OSTI)

An ab initio calculation of atomic ionization of germanium (Ge) by neutrinos was carried out in the framework of multiconfiguration relativistic random phase approximation. The main goal is to provide a more accurate cross section formula than the conventional one, which is based on the free electron approximation, for searches of neutrino magnetic moments with Ge detectors whose threshold is reaching down to the sub-keV regime. Limits derived with both methods are compared, using reactor neutrino data taken with low threshold germanium detectors.

Jiunn-Wei Chen; Hsin-Chang Chi; Keh-Ning Huang; C. -P. Liu; Hao-Tse Shiao; Lakhwinder Singh; Henry T. Wong; Chih-Liang Wu; Chih-Pan Wu

2013-11-21T23:59:59.000Z

15

Muon anomalous magnetic moment constraints on supersymmetric U(1){sup '} models  

Science Conference Proceedings (OSTI)

We study the anomalous magnetic moment of the muon in supersymmetric E{sub 6} models and generic U(1){sup '} models to probe the model reactions and to find constraints on the large parameter space of these models. For future searches, by imposing the existing bounds coming from collider searches and theoretical considerations upon the U(1){sup '} model parameters, we examine the lightest Higgs boson mass m{sub h} and the mass of the additional Z boson m{sub Z{sub 2}} in such singlet extensions of the MSSM. We observed that not only supersymmetric E{sub 6} models but also generic U(1){sup '} models are sensitive to the imposition of the considered bounds. Indeed, without the muon anomaly constraints E{sub 6} models and generic U(1){sup '} models can predict m{sub h} as large as {approx}150 GeV and {approx}180 GeV, respectively. However, in addition to the mentioned constraints when a 1{sigma} range for the anomalous magnetic moment of the muon is considered, we observe that generic U(1){sup '} models do not favor the mass of the lightest Higgs boson to be larger than 140 GeV; it should be smaller than 135 GeV in E{sub 6} models.

Cincioglu, Elif; Solmaz, Saime; Solmaz, Levent; Hicyilmaz, Yasar [Department of Physics, Balikesir University, TR10145, Balikesir (Turkey); Kirca, Zerrin [Department of Physics, Balikesir University, TR10145, Balikesir (Turkey); Department of Physics, Uludag University, TR16000, Bursa (Turkey); Sert, Hale [Department of Physics, Izmir Institute of Technology, TR35430, Izmir (Turkey)

2010-09-01T23:59:59.000Z

16

Waves of magnetic moment and generation of waves by neutron beam in quantum magnetized plasma  

E-Print Network (OSTI)

This paper is devoted to studying of dispersion of waves in the magnetized plasma with the spin and exploring of new methods of the generation wave in the plasma. We consider the dispersion of waves, existed in the plasma in consequence of dynamic of the magnetic moments. It is shown there are nine new waves in the magnetized plasma because of the magnetic moments dynamic. We show there are instabilities at propagation of the neutron beam through the plasma. Increments of instabilities caused by neutron beam are calculated. For studying of this effects we generalize and use the method of the many-particle quantum hydrodynamics. Described processes can play important role at calculation of the stability and the safeness of the nuclear reactors and the studying of the processes in the atmosphere of the neutron stars.

P. A. Andreev; L. S. Kuz'menkov

2011-09-15T23:59:59.000Z

17

-Interface effects on the magnetic moment of Co and Cu in CoCu granular alloys  

SciTech Connect

We report on x-ray magnetic circular dichroism experiments performed on Co{sub 5}Cu{sub 95} annealed granular alloys with giant magnetoresistance. Results on the Co-L{sub 2,3} edge evidence a direct correlation between the Co orbital and spin magnetic moment and the Co clusters interfacial roughness. On the other hand, we have found dichroism on the Cu-L{sub 2,3} edge, revealing an induced magnetic polarization of the Cu interfacial atoms. The magnetic moment of the Cu atoms is mainly of spin character and is ferromagnetically coupled with the Co magnetic moment.

Garcia Prieto, A.; Fdez-Gubieda, M.L.; Chaboy, J.; Laguna-Marco, M.A.; Muro, T.; Nakamura, T. [Departamento de Electricidad y Electronica, Universidad del Pais Vasco (UPV/EHU), Apartado 644, 48080 Bilbao (Spain); Instituto de Ciencia de Materiales de Aragon, CSIC-Universidad de Zaragoza, 50009 Zaragoza (Spain); CITIMAC, Universidad de Cantabria, Avenida de los Castros s/n, 39005 Santander (Spain); Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Mikazuki, Sayo, Hyogo 679-5148 (Japan)

2005-12-01T23:59:59.000Z

18

Measurement of the Neutron Magnetic Dipole Moment Using ...  

Science Conference Proceedings (OSTI)

... dipole moment (EDM) using a similar technique. This technique is completely different from standard neutron EDM experiments which use UCN in ...

2013-07-30T23:59:59.000Z

19

Extracting Nucleon Magnetic Moments and Electric Polarizabilities from Lattice QCD in Background Electric Fields  

E-Print Network (OSTI)

Nucleon properties are investigated in background electric fields. As the magnetic moments of baryons affect their relativistic propagation in constant electric fields, electric polarizabilities cannot be determined without knowledge of magnetic moments. We devise combinations of nucleon correlation functions in external electric fields to isolate both observables. Using an ensemble of anisotropic gauge configurations with dynamical clover fermions, we demonstrate how magnetic moments and electric polarizabilities can be determined from lattice QCD simulations in background electric fields. We obtain results for both the neutron and proton, however, our study is currently limited to electrically neutral sea quarks. The value we extract for the nucleon isovector magnetic moment is comparable to that obtained from measuring lattice three-point functions at similar pion masses.

Detmold, William; Walker-Loud, Andre

2010-01-01T23:59:59.000Z

20

Contributions to the muon's anomalous magnetic moment from a hidden sector  

SciTech Connect

Research Highlights: > Described scenario involving hidden and connector particles that couple to the standard model which could be relevant for dark matter. > Examined constraints on such particles in the case that the SM particle they couple to is the muon. > Found regions of couplings which could explain the discrepancy in the muon's anomalous magnetic moment which differ for different hidden and connector particles' spins. - Abstract: The measurement of the anomalous magnetic moment of the muon provides a stringent test of the standard model and of any physics that lies beyond it. There is currently a deviation of 3.1{sigma} between the standard model prediction for the muon's anomalous magnetic moment and its experimental value. We calculate the contribution to the anomalous magnetic moment in theories where the muon couples to a particle in a hidden sector (that is, uncharged under the standard model) and a connector (which has nontrivial standard model gauge and hidden sector quantum numbers).

McKeen, David, E-mail: mckeen@uvic.ca [Enrico Fermi Institute and Department of Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States)

2011-06-15T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Neutrino chirality flip in a supernova and the bound on the neutrino magnetic moment  

E-Print Network (OSTI)

The neutrino chirality-flip process under the conditions of the supernova core is investigated in detail with the plasma polarization effects in the photon propagator taken into account. It is shown that the contribution of the proton fraction of plasma is essential. New upper bounds on the neutrino magnetic moment are obtained: mu_nu flip. The best astrophysical upper bound on the neutrino magnetic moment is improved by the factor of 3 to 7.

A. V. Kuznetsov; N. V. Mikheev

2006-06-25T23:59:59.000Z

22

Apparatus and method for detecting a magnetic anomaly contiguous to remote location by SQUID gradiometer and magnetometer systems  

DOE Patents (OSTI)

A superconducting quantum interference device (SQUID) magnetic detection apparatus detects magnetic fields, signals, and anomalies at remote locations. Two remotely rotatable SQUID gradiometers may be housed in a cryogenic environment to search for and locate unambiguously magnetic anomalies. The SQUID magnetic detection apparatus can be used to determine the azimuth of a hydrofracture by first flooding the hydrofracture with a ferrofluid to create an artificial magnetic anomaly therein.

Overton, W.C. Jr.; Steyert, W.A. Jr.

1981-05-22T23:59:59.000Z

23

Feasibility of detecting artificial magnetic anomalies in hydrofractured rock by superconducting gradiometer-SQUID systems  

DOE Green Energy (OSTI)

A study of the signal physics of magnetic anomaly detection by superconducting gradiometer-SQUID systems to determine the feasibility of possible applications to the geothermal energy program is described. The system would make full use of the incredible sensitivity of the superconducting quantum interference device (SQUID) which can be in the range of 10/sup -11/ Oe. In addition to magnetic anomalies in the earth's field produced by spherical distributions of magnetic matter, anomalies that would be artificially produced by flooding magnetic material into cracks produced by hydrofracturing in deep boreholes drilled into dry rock geothermal sources are considered. The study indicates that surface detection by horizontal and vertical gradiometers of crack anomalies will not be feasible if the magnetic material flooding the crack is a paramagnetic solution. However, one can concoct a slurry to carry prepolarized ferromagnetic particles of a size sufficiently large to permit domain formation but small enough to permit rotation and alignment in the earth's field. In this case, the anomaly signal is large enough to permit extraction of anomaly orientation information out of the background of magnetic noise and earth's field gradients. The superconducting gradiometer-SQUID system is shown to be exceptional in its capability of removing undesirable magnetic noise and gradients. The greatest promise was found in systems that would be comprised of a magnetometer or gradiometer that could be lowered into the borehole to positions opposite the formations cracked by hydrofracturing. The use of a paramagnetic material to produce the artificial anomaly will not provide signals of sufficient amplitude to overcome the magnetic noise. However, the slurry containing only one percent by volume of ferromagnetic particles will produce a crack anomaly that is easily detectable by magnetometer or by the superconducting gradiometer-SQUID system.

Overton, W.C. Jr.

1976-12-01T23:59:59.000Z

24

Constraining neutrino magnetic moment with solar and reactor neutrino data  

E-Print Network (OSTI)

We use solar neutrino data to derive stringent bounds on Majorana neutrino transition moments (TMs). Such moments, if present, would contribute to the neutrino-electron scattering cross section and hence alter the signal observed in Super-Kamiokande. Using the latest solar neutrino data, combined with the results of the reactor experiment KamLAND, we perform a simultaneous fit of the oscillation parameters and TMs. Furthermore, we include data from the reactor experiments Rovno, TEXONO and MUNU in our analysis, improving significantly the current constraints on TMs. A comparison with previous works shows that our bounds are the strongest and most general results presented up to now. Finally, we perform a simulation of the future Borexino experiment and show that it will improve the bounds from today's data by order of magnitude.

M. A. Tortola

2004-01-19T23:59:59.000Z

25

Moment-free toroidal magnet background of the invention  

DOE Patents (OSTI)

A toroidal magnet is described for confining a high magnetic field for use in fusion reactor research and nuclear particle detection. The magnet includes a series of conductor elements arranged about and fixed at its small major radius portion to the outer surface of a central cylindrical support each conductor element having a geometry such as to maintain the conductor elements in pure tension when a high current flows therein, and a support assembly which redistributes all or part of the tension which would otherwise arise in the small major radius portion of each coil element to the large major radius portion thereof.

Not Available

1981-03-02T23:59:59.000Z

26

Hadronic Light-by-Light Scattering Contribution to the Muon Anomalous Magnetic Moment  

E-Print Network (OSTI)

We review the current status of theoretical calculations of the hadronic light-by-light scattering contribution to the muon anomalous magnetic moment. Different approaches and related issues such as OPE constraints and large breaking of chiral symmetry are discussed. Combining results of different models with educated guesses on the errors we come to the estimate $$a^{\\rm HLbL}=(10.5\\pm 2.6)\\times 10^{-10}.$$ The text is prepared as a contribution to the {\\it Glasgow White Paper on the present status of the Muon Anomalous Magnetic Moment}.

Joaquim Prades; Eduardo de Rafael; Arkady Vainshtein

2009-01-03T23:59:59.000Z

27

Ionization of hydrogen by neutrino magnetic moment, relativistic muon, and WIMP  

E-Print Network (OSTI)

We studied the ionization of hydrogen by scattering of neutrino magnetic moment, relativistic muon, and weakly-interacting massive particle with a QED-like interaction. Analytic results were obtained and compared with several approximation schemes often used in atomic physics. As current searches for neutrino magnetic moment and dark matter have lowered the detector threshold down to the sub-keV regime, we tried to deduce from this simple case study the influence of atomic structure on the the cross sections and the applicabilities of various approximations. The general features being found will be useful for cases where practical detector atoms are considered.

Jiunn-Wei Chen; C. -P. Liu; Chien-Fu Liu; Chih-Liang Wu

2013-07-10T23:59:59.000Z

28

Electric/magnetic duality for chiral gauge theories with anomaly cancellation  

E-Print Network (OSTI)

We show that 4D gauge theories with Green-Schwarz anomaly cancellation and possible generalized Chern-Simons terms admit a formulation that is manifestly covariant with respect to electric/magnetic duality transformations. This generalizes previous work on the symplectically covariant formulation of anomaly-free gauge theories as they typically occur in extended supergravity, and now also includes general theories with (pseudo-)anomalous gauge interactions as they may occur in global or local N=1 supersymmetry. This generalization is achieved by relaxing the linear constraint on the embedding tensor so as to allow for a symmetric 3-tensor related to electric and/or magnetic quantum anomalies in these theories. Apart from electric and magnetic gauge fields, the resulting Lagrangians also feature two-form fields and can accommodate various unusual duality frames as they often appear, e.g., in string compactifications with background fluxes.

Jan De Rydt; Torsten T. Schmidt; Mario Trigiante; Antoine Van Proeyen; Marco Zagermann

2008-08-15T23:59:59.000Z

29

Neutrino Magnetic Moments, Flavor Mixing, and the Super-Kamiokande Solar Data  

Science Conference Proceedings (OSTI)

We find that magnetic neutrino-electron scattering is unaffected by oscillations for vacuum mixing of Dirac neutrinos with only diagonal moments and for Majorana neutrinos with two flavors. For Mikheyev-Smirnov-Wolfenstein mixing, these cases are again obtained, though the effective moments can depend on the neutrino energy. Thus, e.g., the magnetic moments measured with {nu}(bar sign){sub e} from a reactor and {nu}{sub e} from the Sun could be different. With minimal assumptions, we find a new limit on {mu}{sub {nu}} using the 825-d Super-Kamiokande solar neutrino data: |{mu}{sub {nu}}|{<=}1.5x10{sup -} {sup 10}{mu}{sub B} at 90% CL, comparable to the existing reactor limit. (c) 1999 The American Physical Society.

Beacom, J. F.; Vogel, P.

1999-12-20T23:59:59.000Z

30

High-precision evaluation of the magnetic moment of the helion  

SciTech Connect

NMR spectra of samples containing a mixture of hydrogen deuteride HD with pressure of about 80 atm and helium-3 with partial pressure of about 1 atm are analyzed. The ratio of the resonance frequencies of the nuclei, F({sup 3}He)/F(H{sub 2}), is determined to be 0.761786594(2), which is equal to the magnetic moment of the helion (bound in a helium atom) in the units of the magnetic moment of a proton (bound in molecular hydrogen). The uncertainty of two digits in the last place corresponds to a relative error of {delta}[F({sup 3}He)/F(H{sub 2})] = 2.6 Multiplication-Sign 10{sup -9}. The use of the known calculated data on the shielding of nuclei in the helium-3 atom ({sigma}({sup 3}He) = 59924(2) Multiplication-Sign 10{sup -9}) and on the shielding of protons in hydrogen ({sigma}(H{sub 2}) = 26288(2) Multiplication-Sign 10{sup -9}) yields a value of {mu}({sup 3}He)/{mu}{sub p} = -0.761812217(3) for the free magnetic moment of the helion in the units of the proton magnetic moment.

Neronov, Yu. I., E-mail: yineronov@mail.ru; Seregin, N. N. [Mendeleev All-Russia Research Institute of Metrology (Russian Federation)

2012-11-15T23:59:59.000Z

31

Magnetic and gravity anomaly patterns related to hydrocarbon fields in northern West Siberia  

SciTech Connect

A study of the features of gravity and magnetic fields in the vicinity of oil and gas reservoirs in West Siberia demonstrated a spatial relationship with the hydrocarbon deposits. The relevant magnetic and gravity anomalies cover approximately 900,000 km{sup 2} in northern West Siberia. Amplitude and frequency were investigated initially using double Fourier spectrum (DFS) analysis. This was followed by (1) application of transformations, filtering, and moving windows analysis; (2) compilation of maps of regional and local anomalies, and potential field derivatives; and (3) investigation of the distribution of parameters in areas of known deposits. Hydrocarbon deposits are located mostly at the slopes of positive regional gravity and magnetic anomalies which are interpreted as relating to deep riftogenic structures. At the same time, it is established that the location of hydrocarbon depositions coincides commonly with local gravity and magnetic minima generated by lows in basement density and magnetization. All known hydrocarbon deposits in northern West Siberia are in areas characterized by comparatively high gradients of constituent of gravity anomalies with a wavelength of about 90--100 km. These newly revealed links between reservoirs and potential field parameters may be a means to predict new discoveries in poorly explored territories and seas, primarily in Russia`s Arctic shelf.

Piskarev, A.L.; Tchernyshev, M.Yu. [VNIIOkeangeologia, St. Petersburg (Russian Federation)

1997-05-01T23:59:59.000Z

32

Remote Energetic Neutral Atom Imaging of Electric Potential Over a Lunar Magnetic Anomaly  

E-Print Network (OSTI)

The formation of electric potential over lunar magnetized regions is essential for understanding fundamental lunar science, for understanding the lunar environment, and for planning human exploration on the Moon. A large positive electric potential was predicted and detected from single point measurements. Here, we demonstrate a remote imaging technique of electric potential mapping at the lunar surface, making use of a new concept involving hydrogen neutral atoms derived from solar wind. We apply the technique to a lunar magnetized region using an existing dataset of the neutral atom energy spectrometer SARA/CENA on Chandrayaan-1. Electrostatic potential larger than +135 V inside the Gerasimovic anomaly is confirmed. This structure is found spreading all over the magnetized region. The widely spread electric potential can influence the local plasma and dust environment near the magnetic anomaly.

Futaana, Y; Wieser, M; Lue, C; Wurz, P; Vorburger, A; Bhardwaj, A; Asamura, K; 10.1002/grl.50135

2013-01-01T23:59:59.000Z

33

Gravity and magnetic anomalies and the deep structure of the Parnaiba cratonic basin, Brazil  

E-Print Network (OSTI)

Gravity and magnetic anomalies and the deep structure of the Parnaiba cratonic basin, Brazil A. B profile across the Parnaiba cratonic basin in NorthEast Brazil. The purpose of this project is to acquire margin of Parnaíba Basin, Brazil. Geophysics 64: 337-356. Ussami N, Cogo de Sa N, Molina EC. 1993

Watts, A. B. "Tony"

34

Reactor Searches for Neutrino Magnetic Moment as a Probe of Extra Dimensions  

E-Print Network (OSTI)

We present calculations of the magnetic moment contribution to neutrino electron scattering in large extra dimension brane-bulk models (LED) with three bulk neutrinos. We discuss the cases with two and three large extra dimensions of sizes $R$. The calculations are done using reactor flux from Uranium, $^{235}U$ as the neutrino source. We find that if the electron neutrino mass is chosen to be in the range of one eV, the differential cross section for $\\bar{\

Mohapatra, Rabindra N; Yu, Haibo; Ng, Siew-Phang; Yu, Haibo

2004-01-01T23:59:59.000Z

35

Reactor Searches for Neutrino Magnetic Moment as a Probe of Extra Dimensions  

E-Print Network (OSTI)

We present calculations of the magnetic moment contribution to neutrino electron scattering in large extra dimension brane-bulk models (LED) with three bulk neutrinos. We discuss the cases with two and three large extra dimensions of sizes $R$. The calculations are done using reactor flux from Uranium, $^{235}U$ as the neutrino source. We find that if the electron neutrino mass is chosen to be in the range of one eV, the differential cross section for $\\bar{\

R. N. Mohapatra; Siew-Phang Ng; Haibo Yu

2004-04-29T23:59:59.000Z

36

The Anomalous Magnetic Moment of the Muon and Higgs-Mediated Flavor Changing Neutral Currents  

E-Print Network (OSTI)

In the two-Higgs doublet extension of the standard model, flavor-changing neutral couplings arise naturally. In the lepton sector, the largest such coupling is expected to be $\\mu-\\tau-\\phi#. We consider the effects of this coupling on the anomalous magnetic moment of the muon. The resulting bound on the coupling, unlike previous bounds, is independent of the value of other unknown couplings. It will be significantly improved by the upcoming E821 experiment at Brookhaven National Lab.

Shuquan Nie; Marc Sher

1998-05-19T23:59:59.000Z

37

Spin flip of neutrinos with magnetic moment in core-collapse supernova  

Science Conference Proceedings (OSTI)

Neutrinos with magnetic moment experience chirality flips while scattering off charged particles. It is known that if neutrino is a Dirac fermion, then such chirality flips lead to the production of sterile right-handed neutrinos inside the core of a star during the stellar collapse, which may facilitate the supernova explosion and modify the supernova neutrino signal. In the present paper we reexamine the production of right-handed neutrinos during the collapse using a dynamical model of the collapse. We refine the estimates of the values of the Dirac magnetic moment which are necessary to substantially alter the supernova dynamics and neutrno signal. It is argued in particular that Super-Kamiokande will be sensitive at least to {mu}{sub {nu}Dirac} = 10{sup -13{mu}}{sub B} in case of a galactic supernova explosion. Also we briefly discuss the case of Majorana neutrino magnetic moment. It is pointed out that in the inner supernova core spin flips may quickly equilibrate electron neutrinos with nonelectron antineutrinos if {mu}{sub {nu}Majorana} {>=} 10{sup -12{mu}}{sub B}. This may lead to various consequences for supernova physics.

Lychkovskiy, O. V., E-mail: lychkovskiy@itep.ru; Blinnikov, S. I. [Institute for Theoretical and Experimental Physics (Russian Federation)

2010-04-15T23:59:59.000Z

38

Electrical tuning of valley magnetic moment through symmetry control in bilayer MoS2  

SciTech Connect

Crystal symmetry governs the nature of electronic Bloch states. For example, in the presence of time-reversal symmetry, the orbital magnetic moment and Berry curvature of the Bloch states must vanish unless inversion symmetry is broken1. In certain two-dimensional electron systems such as bilayer graphene, the intrinsic inversion symmetry can be broken simply by applying a perpendicular electric field2,3. In principle, this offers the possibility of switching on/off and continuously tuning the magnetic moment and Berry curvature near the Dirac valleys by reversible electrical control4,5. Here we investigate this possibility using polarization-resolved photoluminescence of bilayer MoS2, which has the same symmetry as bilayer graphene but has a bandgap in the visible spectrum6,7 allowing direct optical probing5,8 12. We find that in bilayer MoS2 the circularly polarized photoluminescence can be continuously tuned from 15% to 15% as a function of gate voltage, whereas in structurally non-centrosymmetric monolayer MoS2 the photoluminescence polarization is gate independent. The observations are well explained as resulting from the continuous variation of orbital magnetic moments between positive and negative values through symmetry control.

Wu, Sanfeng [University of Washington, Seattle; Ross, Jason [University of Washington, Seattle; Liu, G. B. [University of Hong Kong, The; Aivazian, Grant [University of Washington, Seattle; Jones, Aaron [University of Washington, Seattle; Fei, Zaiyao [University of Washington, Dept Phys, Seattle, WA; Zhu, Wenguang [University of Tennessee, Knoxville (UTK); Xiao, Di [ORNL; Yao, Wang [University of Hong Kong, The; Cobden, David [University of Washington, Dept Phys, Seattle, WA; Xu, Xiaodong [University of Washington

2013-01-01T23:59:59.000Z

39

Magnetic moment type of lifting from particle dynamics to Vlasov-Maxwell dynamics  

E-Print Network (OSTI)

Techniques for coordinate changes that depend on both dependent and independent variables are developed and applied to the Maxwell-Vlasov Hamiltonian theory. Particle coordinate changes with a new velocity variable dependent on the magnetic field, with spatial coordinates unchanged, are lifted to transform the noncanonical Poisson bracket and, thus, the field Hamiltonian structure of the Vlasov-Maxwell equation. Several examples are given including magnetic coordinates, where the velocity is decomposed into components parallel and perpendicular to the local magnetic field, and the case of spherical velocity coordinates. An example of the lifting procedure is performed to obtain a simplified version of gyrokinetics, where the magnetic moment is used as a coordinate and the dynamics is reduced by elimination of the electric field energy in the Hamiltonian.

P. J. Morrison; M. Vittot; Loic de Guillebon

2012-12-12T23:59:59.000Z

40

Effect of Electric and Magnetic Fields on Spin Dynamics in the Resonant Electric Dipole Moment Experiment  

E-Print Network (OSTI)

A buildup of the vertical polarization in the resonant electric dipole moment (EDM) experiment [Y. F. Orlov, W. M. Morse, and Y. K. Semertzidis, Phys. Rev. Lett. 96, 214802 (2006)] is affected by a horizontal electric field in the particle rest frame oscillating at a resonant frequency. This field is defined by the Lorentz transformation of an oscillating longitudinal electric field and a uniform vertical magnetic one. The effect of a longitudinal electric field is significant, while the contribution from a magnetic field caused by forced coherent longitudinal oscillations of particles is dominant. The effect of electric field on the spin dynamics was not taken into account in previous calculations. This effect is considerable and leads to decreasing the EDM effect for the deuteron and increasing it for the proton. The formula for resonance strengths in the EDM experiment has been derived. The spin dynamics has been calculated.

Alexander J. Silenko

2006-04-11T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Magnetic moment of Ag-104(m) and the hyperfine magnetic field of Ag in Fe using nuclear magnetic resonance on oriented nuclei  

E-Print Network (OSTI)

Nuclear magnetic resonance (NMR/ON) measurements with beta- and gamma-ray detection have been performed on oriented Ag-104(g,m) nuclei with the NICOLE He-3-He-4 dilution refrigerator setup at ISOLDE/CERN. For Ag-104(g) (I-pi = 5(+)) the gamma-NMR/ON resonance signal was found at nu = 266.70(5) MHz. Combining this result with the known magnetic moment for this isotope, the magnetic hyperfine field of Ag impurities in an Fe host at low temperature (< 1 K) is found to be vertical bar B-hf(AgFe)vertical bar = 44.709(35) T. A detailed analysis of other relevant data available in the literature yields three more values for this hyperfine field. Averaging all four values yields a new and precise value for the hyperfine field of Ag in Fe; that is, vertical bar B-hf(AgFe)vertical bar = 44.692(30) T. For Ag-104(m) (I-pi = 2(+)), the anisotropy of the beta particles provided the NMR/ON resonance signal at nu = 627.7(4) MHz. Using the new value for the hyperfine field of Ag in Fe, this frequency corresponds to the magnetic moment mu(Ag-104m) = +3.691(3) mu(N), which is significantly more precise than previous results. The magnetic moments of the even-A Ag102 -110 isotopes are discussed in view of the competition between the (pi g(9/2))(7/2+)(-3)(nu d(5/2)nu g(7/2))(5/2+) and the (pi g(9/2))(9/2+)(-3)(nu d(5/2)nu g(7/2))(5/2+) configurations. The magnetic moments of the ground and isomeric states of Ag-104 can be explained by an almost complete mixing of these two configurations.

V. V. Golovko; I. S. Kraev; T. Phalet; B. Delaure; M. Beck; V. Yu. Kozlov; S. Coeck; F. Wauters; P. Herzog; Ch. Tramm; D. Zakoucky; D. Venos; D. Srnka; M. Honusek; U. Koester; N. Severijns

2010-06-30T23:59:59.000Z

42

Spin-polarized relativistic linear-muffin-tin-orbital method: Volume-dependent electronic structure and magnetic moment of plutonium  

Science Conference Proceedings (OSTI)

The linear-muffin-tin-orbital method is generalized to the case of relativistic and spin-polarized self-consistent band calculations. Our formalism is analogous to the standard orthogonal--linear-muffin-tin-orbital formalism, except that the potential functions and the potential parameters are now matrices. The method is used to perform density-functional calculations for fcc plutonium with different atomic volumes. The formation of spin and orbital magnetic moments, as well as the changes in the energy bands for volume changes corresponding to the {alpha}-{delta} transition, are investigated. The calculated magnetic moments agree quite well with the experimental ones.

Solovyev, I.V. (Institute of Chemistry, Ural Branch of U.S.S.R. Academy of Science, Sverdlovsk GSP-145, U.S.S.R. (SU)); Liechtenstein, A.I. (Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, D-7000 Stuttgart 80, Federal Republic of Germany (DE)); Gubanov, V.A. (Institute of Chemistry, Ural Branch of U.S.S.R. Academy of Science, Sverdlovsk GSP-145, U.S.S.R. (SU)); Antropov, V.P. (Institute of Metal Physics, Ural Branch of U.S.S.R. Academy of Science, Sverdlosk GSP-145, U.S.S.R. (SU)); Andersen, O.K. (Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, D-7000 Stuttgart 80, Federal Republic of Germany (DE))

1991-06-15T23:59:59.000Z

43

Making a Magnetic Moment in a Split Picosecond | Advanced Photon Source  

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

Unpeeling Atoms and Molecules from the Inside Out Unpeeling Atoms and Molecules from the Inside Out Butterfly Wing Yields Clues to Light-Altering Structures Squeezing Information from Materials under Extreme Pressure Quick-Change Molecules Caught in the Act The Molecular Mechanics of Hearing and Deafness Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Making a Magnetic Moment in a Split Picosecond JULY 1, 2010 Bookmark and Share Michel van Veenendaal (left) and Jun Chang in van Veenendaal's office at the APS, discussing figure 3 from their Physical Review Letters article, "Model of Ultrafast Intersystem Crossing in Photoexcited Transition-Metal Organic Compounds." A wide range of phenomena in nature and technology depend on changes that

44

Hadronic light-by-light scattering contribution to the muon anomalous magnetic moment revisited  

E-Print Network (OSTI)

We discuss hadronic light-by-light scattering contribution to the muon anomalous magnetic moment a_\\mu^{\\rm lbl}, paying particular attention to the consistent matching between the short- and the long-distance behavior of the light-by-light scattering amplitude. We argue that the short-distance QCD imposes strong constraints on this amplitude overlooked in previous analyses. We find that accounting for these constraints leads to approximately 50 per cent increase in the central value of a_\\mu^{\\rm lbl}, compared to existing estimates. The hadronic light-by-light scattering contribution becomes a_\\mu^{\\rm lbl}=136(25) \\times 10^{-11}, thereby shifting the Standard Model prediction closer to the experimental value.

Kirill Melnikov; Arkady Vainshtein

2003-12-16T23:59:59.000Z

45

Detection of a thin sheet magnetic anomaly by squid-gradiometer systems: possibility of hydrofracture azimuth determination  

DOE Green Energy (OSTI)

A study of the signal physics of magnetic anomaly detection was carried out by superconducting gradiometer and magnetometer loop systems with SQUID sensors for possible application to the LASL geothermal energy program. In particular, the crack produced by hydrofracture of a deep HDR geothermal borehole would be filled with a magnetic material such as ferrofluid. When polarized by the earth's field, this material would produce a localized crack magnetic anomaly which is characteristic of the azimuth of the vertical crack with respect to magnetic north. Signatures of the anomaly would be determined by taking rotation data before and after filling the crack with magnetic material. A mathematical description was found for these signatures. To test the theory and the feasibility of the idea, the deep borehole vertical cracks were simulated by using panels to define sheets 1.5 mm thick, 1.2 m wide, and 2.5 m high. When filled with ferrofluid of suitable magnetic permeability, the local anomaly develops. Signatures were measured with a horizontal axial gradiometer rotated about a vertical axis. Good agreement was found between theory and experiment for aximuths in the east and west quadrants but only fair agreement in the north and south quadrants.

Overton, W.C. Jr.

1978-12-01T23:59:59.000Z

46

Higgs mass and muon anomalous magnetic moment in supersymmetric models with vectorlike matters  

SciTech Connect

We study the muon anomalous magnetic moment (muon g-2) and the Higgs boson mass in a simple extension of the minimal supersymmetric (SUSY) standard model with extra vectorlike matters, in the frameworks of gauge-mediated SUSY breaking (GMSB) models and gravity mediation (mSUGRA) models. It is shown that the deviation of the muon g-2 and a relatively heavy Higgs boson can be simultaneously explained in large tan{beta} region. (i) In GMSB models, the Higgs mass can be more than 135 GeV (130 GeV) in the region where the muon g-2 is consistent with the experimental value at the 2{sigma} (1{sigma}) level, while maintaining the perturbative coupling unification. (ii) In the case of mSUGRA models with universal soft masses, the Higgs mass can be as large as about 130 GeV when the muon g-2 is consistent with the experimental value at the 2{sigma} level. In both cases, the Higgs mass can be above 140 GeV if the g-2 constraint is not imposed.

Endo, Motoi; Hamaguchi, Koichi [Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan); Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, Chiba, 277-8583 (Japan); Iwamoto, Sho; Yokozaki, Norimi [Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)

2011-10-01T23:59:59.000Z

47

Tests of hadronic vacuum polarization fits for the muon anomalous magnetic moment  

E-Print Network (OSTI)

We construct a physically motivated model for the isospin-one non-strange vacuum polarization function Pi(Q^2) based on a spectral function given by vector-channel OPAL data from hadronic tau decays for energies below the tau mass and a successful parametrization, employing perturbation theory and a model for quark-hadron duality violations, for higher energies. Using a covariance matrix and Q^2 values from a recent lattice simulation, we then generate fake data for Pi(Q^2) and use it to test fitting methods currently employed on the lattice for extracting the hadronic vacuum polarization contribution to the muon anomalous magnetic moment. This comparison reveals a systematic error much larger than the few-percent total error sometimes claimed for such extractions in the literature. In particular, we find that errors deduced from fits using a Vector Meson Dominance ansatz are misleading, typically turning out to be much smaller than the actual discrepancy between the fit and exact model results. The use of a ...

Golterman, Maarten; Peris, Santiago

2013-01-01T23:59:59.000Z

48

Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements  

SciTech Connect

Using the transient field technique, the magnetic moments of the second excited 2{sup +} states in {sup 92,94}Zr have been measured for the first time. The large positive g factors, g(2{sub 2}{sup +};{sup 92}Zr)=+0.76(50) and g(2{sub 2}{sup +};{sup 94}Zr)=+0.88(27), which are in contrast to the known negative g factors of the 2{sub 1}{sup +} states, are found to be a consequence of weak proton-neutron coupling combined with the Z=40 subshell closure. From their large M1 transition strengths to the 2{sub 1}{sup +} states, in earlier works an assignment to the 2{sub 2}{sup +} states as proton-neutron symmetric and mixed-symmetry states has been made, which are now found to be polarized in their proton-neutron content. This fact allows to identify the underlying microscopic main configurations in the wave functions, which form the building blocks of symmetric and mixed-symmetry states in this region as valence nucleons are added and shell structure changes.

Werner, V.; Ai, H.; Casperson, R. J.; Casten, R. F.; Eckel, S.; Heinz, A.; Lambie-Hanson, C.; McCutchan, E. A.; Meyer, D. A.; Qian, J.; Schmidt, A.; Williams, E.; Winkler, R. [Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8124 (United States); Benczer-Koller, N.; Kumbartzki, G.; Boutachkov, P. [Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903 (United States); Holt, J. D. [TRIUMF, Vancouver (Canada); Stefanova, E. [Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903 (United States); Institute for Nuclear Research and Nuclear Energy, BAS, 1784 Sofia (Bulgaria); Perry, M. [Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8124 (United States); Department of Physics, Florida State University, Florida (United States); Pietralla, N. [Institut fuer Kernphysik, TU Darmstadt, D-64289 Darmstadt (Germany)] (and others)

2008-09-15T23:59:59.000Z

49

Plasma-induced neutrino helicity flip in a supernova core and a constraint on the Dirac neutrino magnetic moment  

Science Conference Proceedings (OSTI)

We investigate the neutrino helicity flip under supernova core conditions, where the left-handed neutrinos being produced can be converted into right-handed neutrinos sterile with respect to weak interactions owing to the interaction of the magnetic moments with plasma electrons and protons. In calculating the probability for the conversion neutrino scattering by plasma components, we take into account the polarization effects attributable to both electrons and protons in the photon propagator. Based on realistic models with radial distributions and time evolution of physical parameters in a supernova core, we have obtained upper limits on the Dirac neutrino magnetic moment averaged over flavors and time from the condition that the influence of the right-handed neutrino emission on the total cooling time scale should be limited.

Kuznetsov, A. V.; Mikheev, N. V.; Okrugin, A. A., E-mail: okrugin@uniyar.ac.r [Yaroslavl State University (Russian Federation)

2010-07-15T23:59:59.000Z

50

ANOMALIES IN THE APPLIED MAGNETIC FIELDS ON DIII-D AND THEIR IMPLICATIONS FOR THE UNDERSTANDING OF STABILITY EXPERIMENTS  

Science Conference Proceedings (OSTI)

Small non-axisymmetric magnetic fields are known to cause serious loss of stability in tokamaks leading to loss of confinement and abrupt termination of plasma current (disruptions). The best known examples are the locked mode and the resistive wall mode. Understanding of the underlying field anomalies (departures in the hardware-related fields from ideal toroidal and poloidal fields on a single axis) and the interaction of the plasma with them is crucial to tokamak development. Results of both locked mode experiments and resistive wall mode experiments done in DIII-D tokamak plasmas have been interpreted to indicate the presence of a significant anomalous field. New measurements of the magnetic field anomalies of the hardware systems have been made on DIII-D. The measured field anomalies due to the plasma shaping coils in DIII-D are smaller than previously reported. Additional evaluations of systematic errors have been made. New measurements of the anomalous fields of the ohmic heating and toroidal coils have been added. Such detailed in situ measurements of the fields of a tokamak are unique. The anomalous fields from all of the coils are one third of the values indicated from the stability experiments. These results indicate limitations in the understanding of the interaction of the plasma with the external field. They indicate that it may not be possible to deduce the anomalous fields in a tokamak from plasma experiments and that we may not have the basis needed to project the error field requirements of future tokamaks.

LUXON,J.L; SCHAFFER,M.J; JACKSON,G.L; LEUER,J.A; NAGY,A; SCOVILLE,J.T; STRAIT,E.J

2003-02-01T23:59:59.000Z

51

UMD-PP-04-041 Reactor Searches for Neutrino Magnetic Moment as a Probe of Extra Dimensions  

E-Print Network (OSTI)

We present calculations of the magnetic moment contribution to neutrino electron scattering in large extra dimension brane-bulk models (LED) with three bulk neutrinos. We discuss the cases with two and three large extra dimensions of sizes R. The calculations are done using reactor flux from Uranium, 235 U as the neutrino source. We find that if the electron neutrino mass is chosen to be in the range of one eV, the differential cross section for ¯? ? e scattering for low electron recoil energy can be of the same order as the presently explored values in reactor experiments. Furthermore the spectral shape for the LED models is different from the four dimensional case. Future higher precision reactor experiments can therefore be used to provide new constraints on a class of large extra dimension theories. 1 I.

R. N. Mohapatra; Siew-phang Ng; Haibo Yu

2004-01-01T23:59:59.000Z

52

Magnetic moment effects from time-space non-commutativity in the Dirac equation for Hydrogen atom  

E-Print Network (OSTI)

In this work we study the effect of time-space non-commutativity on the hydrogen atom. Our goal is to solve the Dirac equation for the coulomb potential in a non-commutative time-space up to first order in the non-commutativity parameter using the Seiberg-Witten maps and the Moyal product. We thus find the non-commutative modification of the energy levels of hydrogen atom and show that the non-commutativity is the source of magnetic moment. Comparing the results with experimental values from spectroscopy, we get the bound on non-commutativity parameter at the level of (0.1 TeV)$^{-2}$.

Slimane Zaim

2013-01-30T23:59:59.000Z

53

Search for the Neutrino Magnetic Moment in the Non-Equilibrium Reactor Antineutrino Energy Spectrum  

E-Print Network (OSTI)

We study the time evolution of the typical nuclear reactor antineutrino energy spectrum during reactor ON period and the decay of the residual antineutrino spectrum after reactor is stopped. We find that relevant variations of the soft recoil electron spectra produced via weak and magnetic ${\\widetilde {\

V. I. Kopeikin; L. A. Mikaelyan; V. V. Sinev

1999-04-19T23:59:59.000Z

54

Calculation of the expectation values of the spin and the magnetic moment of the gamma photons created as a result of the electron-positron annihilation  

E-Print Network (OSTI)

We have calculated the expectation values of the spin and the intrinsic magnetic moment of the gamma photons created as a result of the electron-positron annihilation. We show that, depending on its helicity a gamma photon propagating in z direction with an angular frequency carries a magnetic moment of along the propagation direction. Here the (+) and (-) signs stand for the right hand and left circular helicity respectively. We also show that whatever the helicity is, the spin of each gamma photon is equal to zero (but not !). We argue that in a Stern-Gerlach experiment (SGE) the magnetic moment is an important property but not the spin of the particles. Because of these two symmetric values of the magnetic moment, we expect a splitting of the gamma photon beam into two symmetric subbeams in a (SGE). We believe that the present result will be helpful for understanding the recent attempts on the (SGE) with slow light and the behavior of the dark polaritons and also the atomic spinor polaritons.

Saglam, Mesude

2012-01-01T23:59:59.000Z

55

On the order of magnitude of 8th order corrections to the anomalous magnetic moment of the muon  

E-Print Network (OSTI)

It is shown that the 8th order contribution to the muon anomaly can be as large as 100-200*( alpha / pi )/sup 4/. (10 refs).

Lautrup, B

1972-01-01T23:59:59.000Z

56

Europhysics Letters PREPRINT Coulomb-U and magnetic moment collapse in ?-Pu  

E-Print Network (OSTI)

PACS. 71.20.Gj – Electronic structure of other crystalline metals and alloys. PACS. 71.27.+a – Strongly correlated electron systems; heavy fermions. PACS. 79.60.-i – Photoemission and photoelectron spectra. Abstract. – The around-the-mean-field version of the LDA+U method is applied to investigate electron correlation effects in ?-Pu. It yields a non-magnetic ground state of ??Pu, and provides a good agreement with experimental equilibrium volume, bulk modulus and explains important features of the photoelectron spectra. Plutonium is probably the most intricate element from the point of view of condensed matter physics. It exhibits six allotropic modifications at ambient pressure, some of them of very low symmetry (monoclinic), and there is little doubt that the anomalous behaviour is related to the 5f electronic states, being at the borderline between the localized, nonbonding, behaviour and the bonding situation of electronic bands. One can preconceive that at the cross-over regime, several states with very different degree of 5f delocalization can be nearly degenerated in energy. The most thoroughly studied phases are ??Pu (monoclinic) and ??Pu (fcc). The latter

A. B. Shick; V. Drchal; L. Havela

2005-01-01T23:59:59.000Z

57

Trace Anomaly in Geometric Discretization  

E-Print Network (OSTI)

I develop the simplest geometric-discretized analogue of two dimensional scalar field theory, which qualitatively reproduces the trace anomaly of the continuous theory. The discrete analogue provides an interpretation of the trace anomaly in terms of a non-trivial transformation of electric-magnetic duality-invariant modes of resistor networks that accommodate both electric and magnetic charge currents.

Czech, B

2007-01-01T23:59:59.000Z

58

Detailed discussion of a linear electric field frequency shift (important for next generation) electric dipole moment searches) induced in confined gases by a magnetic field gradient: Implications for electric dipole moment experiments (II)  

E-Print Network (OSTI)

The search for particle electric dipole moments represents a most promising way to search for physics beyond the standard model. A number of groups are planning a new generation of experiments using stored gases of various kinds. In order to achieve the target sensitivities it will be necessary to deal with the systematic error resulting from the interaction of the well-known E x v field with magnetic field gradients (often referred to as the geometric phase effect [9,10]). This interaction produces a frequency shift linear in the electric field, mimicking an edm. In this work we introduce an analytic model for the correlation function which determines the behavior of the frequency shift [11], and show in detail how it depends on the operating conditions of the experiment. We also propose a method to directly measure ths correlation function under the exact conditions of a given experiment.

A. L. Barabanov; R. Golub; S. K. Lamoreaux

2005-12-08T23:59:59.000Z

59

80 K anomaly and its effect on the superconducting and magnetic transition in deuterated {kappa}-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br  

Science Conference Proceedings (OSTI)

In this paper, we report careful transport and magnetic measurements on single crystals of deuterated {kappa}-(ET){sub 2}Cu[N(CN){sub 2}]Br. By cooling the sample at different rates, it is found that cooling through 80K has a dramatic effect on the normal state metal-insulator transition and the superconducting transition temperatures. In-plane resistivity depends strongly on the cooling rate for temperatures below 80K, above which all resistivity curves cooled at different rates converge. By comparing it with the nondeuterated salt and the quasi-1D Bechgaard salt, we speculate that 80K corresponds to a structural phase transition in the anion chain. Fast cooling through 80K will freeze the high temperature magnetic phase to low temperatures and the presence of local magnetic moments suppresses the superconducting T{sub c}. {copyright} {ital 1998} {ital The American Physical Society}

Su, X.; Zuo, F. [Department of Physics, University of Miami, Coral Gables, Florida 33124 (United States); Schlueter, J.A.; Kini, A.M.; Williams, J.M. [Chemistry and Materials Science Divisions, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

1998-08-01T23:59:59.000Z

60

A measurement of the magnetic dipole moment of the. delta. /sup + +/(1232) from the bremsstrahlung process. pi. p. -->. pi. p. gamma  

SciTech Connect

We have measured the cross section from the bremsstrahlung process ..pi../sup +/p ..-->.. ..pi../sup +/p..gamma.. for incident pions of energy 299 MeV. We detected the out going pion in the angular range from 55 to 95/sup 0/ in the lab, and photons were detected near 240/sup 0/ in the lab. We compare this measured cross-section to the MIT theory in order to extract a measurement of the magnetic dipole moment of the ..delta../sup + +/(1232), ..mu../sub ..delta../. In order to compare our results with the MIT theory, we have folded the MIT theory into the acceptance of our apparatus. We find that for pion angles between 55 and 75/sup 0/ the theory gives us a dipole moment of: 2.3..mu../sub p/ < ..mu../sub ..delta../ < 3.3..mu../sup p/ where the quoted error arises from an experimental uncertainty of +-0.25..mu../sub p/ and from theoretical uncertainties of +-0.25 ..mu../sub p/. However, for pion angles between 75 and 95/sup 0/ we find that the MIT theory predicts a cross-section which is larger than our measured cross-section, and makes it difficult to extract a value of ..mu../sub ..delta../. This over prediction is not understood, but consistent with a similar effect when the MIT theory is fit to previous data. 78 figs., 29 tabs.

Meyer, C.A.

1987-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

NSLS II: Magnetism  

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

spatial ordering of the magnetic moments that is superimposed on the crystal lattice. Why these atomic magnetic moments survive and how they arrange in the solid is the...

62

About possibility to measure an electric dipole moment (EDM) of nuclei in the range $10^{-27} ÷10^{-32}$ $e \\cdot cm$ in experiments for search of time-reversal violating generation of magnetic and electric fields  

E-Print Network (OSTI)

The possibility to measure an electric dipole moment (EDM) of nuclei in the range $10^{-27} \\div 10^{-32}$ $e \\cdot cm$ in experiments for search of time-reversal violating generation of magnetic and electric fields is discussed.

Vladimir Baryshevsky

2004-02-19T23:59:59.000Z

63

Extracting magnetic anomalies based on an improved BEMD method: A case study in the Pangxidong Area, South China  

Science Conference Proceedings (OSTI)

In bidimensional empirical mode decomposition, an appropriate stoppage criterion for the sifting process is important. To solve the problem of unstable convergence, a stepwise stop criterion was presented based on the Cauchy-type criterion. In one sifting ... Keywords: BEMD, Magnetic data, Mode mixing, Stepwise stop criterion

Weisheng Hou; Zhijun Yang; Yongzhang Zhou; Liping Zhang; Wenlong Wu

2012-11-01T23:59:59.000Z

64

Linear electric field frequency shift (important for next generation electric dipole moment searches) induced in confined gases by a magnetic field gradient  

E-Print Network (OSTI)

The search for particle electric dipole moments (edm) represents a most promising way to search for physics beyond the standard model. A number of groups are planning a new generation of experiments using stored gases of various kinds. In order to achieve the target sensitivities it will be necessary to deal with the systematic error resulting from the interaction of the well-known $\\overrightarrow{v}\\times \\overrightarrow{E}$ field with magnetic field gradients (often referred to as the geometric phase effect (Commins, ED; Am. J. Phys. \\QTR{bf}{59}, 1077 (1991), Pendlebury, JM \\QTR{em}{et al;} Phys. Rev. \\QTR{bf}{A70}, 032102 (2004)). This interaction produces a frequency shift linear in the electric field, mimicking an edm. In this work we introduce an analytic form for the velocity auto-correlation function which determines the velocity-position correlation function which in turn determines the behavior of the frequency shift (Lamoreaux, SK and Golub, R; Phys. Rev \\QTR{bf}{A71}, 032104 (2005)) and show how it depends on the operating conditions of the experiment. We also discuss some additional issues.

Authors A. L. Barabanov; R. Golub; S. K. Lamoreaux

2006-07-17T23:59:59.000Z

65

Predictive Capability for Strongly Correlated Systems: Mott Transition in MnO, Multielectron Magnetic Moments, and Dynamics Effects in Correlated Materials  

SciTech Connect

There are classes of materials that are important to DOE and to the science and technology community, generically referred to as strongly correlated electron systems (SCES), which have proven very difficult to understand and to simulate in a material-specific manner. These range from actinides, which are central to the DOE mission, to transition metal oxides, which include the most promising components of new spin electronics applications as well as the high temperature superconductors, to intermetallic compounds whose heavy fermion characteristics and quantum critical behavior has given rise to some of the most active areas in condensed matter theory. The objective of the CMSN cooperative research team was to focus on the application of these new methodologies to the specific issue of Mott transitions, multi-electron magnetic moments, and dynamical properties correlated materials. Working towards this goal, the W&M team extended its first-principles phaseless auxiliary-field quantum Monte Carlo (AFQMC) method to accurately calculate structural phase transitions and excited states.

Krakauer, Henry; Zhang, Shiwei

2013-02-21T23:59:59.000Z

66

Neutron Electric Dipole Moment with Domain Wall Quarks  

E-Print Network (OSTI)

We present preliminary results for nucleon dipole moments computed with domain wall fermions. Our main target is the electric dipole moment of the neutron arising from the theta term in the gauge part of the QCD lagrangian. The calculated magnetic dipole moments of the proton and neutron are in rough accord with experimental values.

F. Berruto; T. Blum; K. Orginos; A. Soni

2004-11-02T23:59:59.000Z

67

Is the Accrual Anomaly a Global Anomaly?  

E-Print Network (OSTI)

This paper investigates the subsequent return implications of accruals within a sample of large, developed, international equity markets and assesses whether similar institutional features account for the accrual anomaly ...

LaFond, Ryan

2005-09-23T23:59:59.000Z

68

Detailed Discussion of a linear electric field frequency shift induced in confined gases by a magnetic field gradient: Implications for neutron electric dipole moment experiments  

E-Print Network (OSTI)

The search for particle electric dipole moments (edm) is one of the best places to look for physics beyond the standard model because the size of time reversal violation predicted by the standard model is incompatible with present ideas concerning the creation of the Baryon-Antibaryon asymmetry. As the sensitivity of these edm searches increases more subtle systematic effects become important. We develop a general analytical approach to describe a systematic effect recently observed in an electric dipole moment experiment using stored particles \\cite{JMP}. Our approach is based on the relationship between the systematic frequency shift and the velocity autocorrelation function of the resonating particles. Our results, when applied to well-known limiting forms of the correlation function, are in good agreement with both the limiting cases studied in recent work that employed a numerical/heuristic analysis. Our general approach explains some of the surprising results observed in that work and displays the rich behavior of the shift for intermediate frequencies, which has not been previously studied.

S. K. Lamoreaux; R. Golub

2004-07-05T23:59:59.000Z

69

Isotopic Anomalies in CP Stars: Helium, Mercury, Platinum, and Calcium  

E-Print Network (OSTI)

We review the classical observational results for isotopic abundance variations for several elements in CP stars. We concentrate on the "newest" anomaly, in calcium. The cosmically very rare isotope, Ca-48 can rival and even dominate the more common, alpha nuclide, Ca-40. Relevant examples are found in the hot, non-magnetic HgMn stars, and the field horizontal-branch star, Feige 86. The calcium anomaly is also present in cool, magnetic stars, including the notorious HD 101065, Przybylski's star.

C. R. Cowley; S. Hubrig; F. Castelli

2007-11-15T23:59:59.000Z

70

Magnetic Devices and Nanostructures (2005)  

Science Conference Proceedings (OSTI)

... Molecular nanomagnets, which are the smallest well defined magnetic ... moment of a specimen as microwave stimulation causes resonance at ...

2010-10-13T23:59:59.000Z

71

Anomaly General Circulation Models  

Science Conference Proceedings (OSTI)

Anomally models based on a spectral general circulation model (GCM) are formulated and applied to study of low-frequency atmospheric variability in the extratropics, and long-range forecasting research. A steady linear version of the anomaly ...

A. Navarra; K. Miyakoda

1988-05-01T23:59:59.000Z

72

2 Geomagnetic dipole moment collapse by convective mixing in the core 3 Lijun Liu1  

E-Print Network (OSTI)

2 Geomagnetic dipole moment collapse by convective mixing in the core 3 Lijun Liu1 and Peter Olson2 of the geomagnetic dipole. Here we 8 determine rates of dipole moment decrease as a function of 9 magnetic Reynolds of decrease of the geomagnetic 27 dipole moment, although it is unlikely that a single mixing 28 flow event

Olson, Peter L.

73

Anomaly Detection at Multiple Scales  

Science Conference Proceedings (OSTI)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Anomaly Detection at Multiple Scales, or ADAMS, is a $35 million DARPA project designed to identify patterns and anomalies ...

Alain Sren Mikhayhu

2012-06-01T23:59:59.000Z

74

Magnetic Moment and Susceptibility Standard Reference ...  

Science Conference Proceedings (OSTI)

... electromagnet, mounted on a movable table with stepping motor precision, sample ... applied via the injection of two parallel electric currents through ...

2013-07-23T23:59:59.000Z

75

Electric Dipole Moments of Neutron-Odd Nuclei  

E-Print Network (OSTI)

The electric dipole moments (EDMs) of neutron-odd nuclei with even protons are systematically evaluated. We first derive the relation between the EDM and the magnetic moment operators by making use of the core polarization scheme. This relation enables us to calculate the EDM of neutron-odd nuclei without any free parameters. From this calculation, one may find the best atomic system suitable for future EDM experiments.

Takehisa Fujita; Sachiko Oshima

2011-02-15T23:59:59.000Z

76

Ground-state electric quadrupole moment of 31Al  

E-Print Network (OSTI)

Ground-state electric quadrupole moment of 31Al (I =5/2+, T_1/2 = 644(25) ms) has been measured by means of the beta-NMR spectroscopy using a spin-polarized 31Al beam produced in the projectile fragmentation reaction. The obtained Q moment, |Q_exp(31Al)| = 112(32)emb, are in agreement with conventional shell model calculations within the sd valence space. Previous result on the magnetic moment also supports the validity of the sd model in this isotope, and thus it is concluded that 31Al is located outside of the island of inversion.

D. Nagae; H. Ueno; D. Kameda; M. Takemura; K. Asahi; K. Takase; A. Yoshimi; T. Sugimoto; K. Shimada; T. Nagatomo; M. Uchida; T. Arai; T. Inoue; S. Kagami; N. Hatakeyama; H. Kawamura; K. Narita; J. Murata

2008-10-16T23:59:59.000Z

77

Moments of ambient Doppler spectra  

DOE Green Energy (OSTI)

The author studied the first four moments (center of mass, standard deviation, skew, and kurtosis) of the Doppler spectra in ambient regions of LLNL-Hughes real aperture radar data collected during WCSEX91--92. The goal was to correlate trends in the moments with wind velocity and direction. Although the center of mass appears to increase when the wind is blowing into the radar antenna, no other conclusions have been drawn from the higher order moments.

Lehman, S.K.

1993-03-23T23:59:59.000Z

78

GENERATING MOMENT MATCHING SCENARIOS USING ...  

E-Print Network (OSTI)

Jan 29, 2013 ... Rates of convergence of moment matching formulas, as the number of ...... corresponding to the lognormal distribution used in the Utility ...

79

Dipole Moment Bounds on Dark Matter Annihilation  

E-Print Network (OSTI)

We consider constraints on simplified models in which scalar dark matter annihilates to light charged leptons through the exchange of charged mediators. We find that loop diagrams will contribute corrections to the magnetic and electric dipole moments of the light charged leptons, and experimental constraints on these corrections place significant bounds on the dark matter annihilation cross section. In particular, annihilation to electrons with an observable cross section would be ruled out, while annihilation to muons is only permitted if the dominant contributions arise from CP-violating interactions.

Keita Fukushima; Jason Kumar

2013-07-26T23:59:59.000Z

80

Monitoring smartphones for anomaly detection  

Science Conference Proceedings (OSTI)

In this paper we demonstrate how to monitor a smartphone running Symbian operating system and Windows Mobile in order to extract features for anomaly detection. These features are sent to a remote server because running a complex intrusion detection ... Keywords: anomaly detection, monitoring, smartphones

Aubrey-Derrick Schmidt; Frank Peters; Florian Lamour; Christian Scheel; Seyit Ahmet Çamtepe; Sahin Albayrak

2009-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Derivation of Generalized Thomas-Bargmann-Michel-Telegdi Equation for a Particle with Electric Dipole Moment  

E-Print Network (OSTI)

General classical equation of spin motion is explicitly derived for a particle with magnetic and electric dipole moments in electromagnetic fields. Equation describing the spin motion relatively the momentum direction in storage rings is also obtained.

Takeshi Fukuyama; Alexander J. Silenko

2013-08-07T23:59:59.000Z

82

TRENDS: Jones et al. Temperature Anomalies  

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

Data Tables of Global and Hemispheric Temperature Anomalies data Table - Global Monthly and Annual Temperature Anomalies, 1850-2012. data Table - Northern Hemisphere Monthly and...

83

The Dynamics of an Electric Dipole Moment in a Stochastic Electric Field  

E-Print Network (OSTI)

The mean-field dynamics of an electric dipole moment in a deterministic and a fluctuating electric field is solved to obtain the average over fluctuations of the dipole moment and the angular mo- mentum as a function of time for a Gaussian white noise stochastic electric field. The components of the average electric dipole moment and the average angular momentum along the deterministic electric field direction do not decay to zero, despite fluctuations in all three components of the elec- tric field. This is in contrast to the decay of the average over fluctuations of a magnetic moment in a stochastic magnetic field with Gaussian white noise in all three components. The components of the average electric dipole moment and the average angular momentum perpendicular to the deterministic electric field direction oscillate with time but decay to zero, and their variance grows with time.

Band, Y B

2013-01-01T23:59:59.000Z

84

New limit on the electron electric dipole moment  

SciTech Connect

We present the result of our most recent search for T-violation in 205Tl, which is interpreted in terms of an electric dipole moment of the electron de. We find de = (6.9 plus/minus 7.4) times 10{sup -28} e cm. The present apparatus is a major upgrade of the atomic beam magnetic resonance device used to set the previous limit on de.

Regan, B.C.; Commins, Eugene D.; Schmidt, Christian J.; DeMille, David

2001-08-08T23:59:59.000Z

85

Graph anomalies in cyber communications  

Science Conference Proceedings (OSTI)

Enterprises monitor cyber traffic for viruses, intruders and stolen information. Detection methods look for known signatures of malicious traffic or search for anomalies with respect to a nominal reference model. Traditional anomaly detection focuses on aggregate traffic at central nodes or on user-level monitoring. More recently, however, traffic is being viewed more holistically as a dynamic communication graph. Attention to the graph nature of the traffic has expanded the types of anomalies that are being sought. We give an overview of several cyber data streams collected at Los Alamos National Laboratory and discuss current work in modeling the graph dynamics of traffic over the network. We consider global properties and local properties within the communication graph. A method for monitoring relative entropy on multiple correlated properties is discussed in detail.

Vander Wiel, Scott A [Los Alamos National Laboratory; Storlie, Curtis B [Los Alamos National Laboratory; Sandine, Gary [Los Alamos National Laboratory; Hagberg, Aric A [Los Alamos National Laboratory; Fisk, Michael [Los Alamos National Laboratory

2011-01-11T23:59:59.000Z

86

Nuclear Quadrupole Moments and Nuclear Shell Structure  

DOE R&D Accomplishments (OSTI)

Describes a simple model, based on nuclear shell considerations, which leads to the proper behavior of known nuclear quadrupole moments, although predictions of the magnitudes of some quadrupole moments are seriously in error.

Townes, C. H.; Foley, H. M.; Low, W.

1950-06-23T23:59:59.000Z

87

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

88

Muonic Hydrogen and the Third Zemach Moment  

E-Print Network (OSTI)

We determine the third Zemach moment of hydrogen (_(2)) using only the world data on elastic electron-proton scattering. This moment dominates the O (Z alpha)^5 hadronic correction to the Lamb shift in muonic atoms. The resulting moment, _(2) = 2.71(13) fm^3, is somewhat larger than previously inferred values based on models. The contribution of that moment to the muonic hydrogen 2S level is -0.0247(12) meV.

J. L. Friar; I. Sick

2005-08-12T23:59:59.000Z

89

Anomalies and asymmetries in quark-gluon matter  

SciTech Connect

The manifestations of axial anomaly and related effects in heavy-ion collisions are considered. Special role is played by various asymmetries. The azimuthal correlational asymmetries of neutron pairs at NICA/FAIR energy range may probe the global rotation of strongly interacting matter. The conductivity is related to the angular asymmetries of dilepton pairs. The strong magnetic field generated in heavy-ion collisions leads to the excess of soft dileptons flying predominantly in the scattering plane.

Teryaev, O. V., E-mail: teryaev@theor.jinr.ru [Joint Institute for Nuclear Research (Russian Federation)

2012-06-15T23:59:59.000Z

90

The conservation of mass-moment parameters  

E-Print Network (OSTI)

In this paper we study a concept of mass-moment parameter which is the generalization of the mass and the moments of inertia of a continuous media. We shall present some interesting kinematical results in the hypothesis that a set of mass-moment parameters are conserved in a motion of a continuous media.

Dan Comanescu

2007-02-16T23:59:59.000Z

91

Image analysis by modified Legendre moments  

Science Conference Proceedings (OSTI)

In the paper, a new set of orthogonal moments based on the modified Legendre polynomials is introduced. Three properties of the modified Legendre polynomials, which are orthogonality, orthogonal invariance and the characteristic that an interval on the ... Keywords: Feature representation capability, Legendre moments, Modified Legendre moments, Translation invariance

Bo Fu; Jianzhong Zhou; Yuhong Li; Guojun Zhang; Cheng Wang

2007-02-01T23:59:59.000Z

92

magnets  

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

I I Painless Physics Articles BEAM COOLING August 2, 1996 By Leila Belkora, Office of Public Affairs ACCELERATION August 16, 1996 By Dave Finley, Accelerator Division Head RF August 30, 1996 By Pat Colestock, Accelerator Division FIXED TARGET PHYSICS September 20, 1996 By Peter H. Garbincius, Physics Section FIXED TARGET PHYSICS PART DEUX October 16, 1996 By Peter H. Garbincius, Physics Section and Leila Belkora, Office of Public Affaris CROSS SECTION November 1, 1996 By Doreen Wackeroth, Theoretical Physics Edited by Leila Belkora, Office of Public Affaris MAGNETS PART I November 15, 1996 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs MAGNETS PART II January 10, 1997 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs

93

Passive analysis of TCP anomalies  

Science Conference Proceedings (OSTI)

In this paper, we focus on passive measurements of TCP traffic. We propose a heuristic technique to classify TCP anomalies, i.e., segments that have a sequence number different from the expected one, such as out-of-sequence and duplicate segments. Since ... Keywords: TCP, Traffic measurements

Marco Mellia; Michela Meo; Luca Muscariello; Dario Rossi

2008-10-01T23:59:59.000Z

94

Statistics and Dynamics of Persistent Anomalies  

Science Conference Proceedings (OSTI)

Persistent anomalies with recurrent spatial patterns play an important role in the atmosphere's low-frequency variability. We establish a connection between statistical and dynamical methods of description and prediction of persistent anomalies. ...

Kingtse C. Mo; Michael Ghil

1987-03-01T23:59:59.000Z

95

Anomaly detection and diagnosis in grid environments  

Science Conference Proceedings (OSTI)

Identifying and diagnosing anomalies in application behavior is critical to delivering reliable application-level performance. In this paper we introduce a strategy to detect anomalies and diagnose the possible reasons behind them. Our approach extends ...

Lingyun Yang; Chuang Liu; Jennifer M. Schopf; Ian Foster

2007-11-01T23:59:59.000Z

96

Magnetic and Electric Dipole Constraints on Extra Dimensions and Magnetic Fluxes  

E-Print Network (OSTI)

The propagation of charged particles and gauge fields in a compact extra dimension contributes to $g-2$ of the charged particles. In addition, a magnetic flux threading this extra dimension generates an electric dipole moment for these particles. We present constraints on the compactification size and on the possible magnetic flux imposed by the comparison of data and theory of the magnetic moment of the muon and from limits on the electric dipole moments of the muon, neutron and electron.

Aaron J. Roy; Myron Bander

2008-05-10T23:59:59.000Z

97

DETERMINATION OF RADIAL MOMENTS OF AN AEROSOL  

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

DETERMINATION OF RADIAL MOMENTS OF AN AEROSOL DETERMINATION OF RADIAL MOMENTS OF AN AEROSOL SIZE DISTRIBUTION FROM MEASUREMENTS OF LIGHT TRANSMITTANCE AND SCATTERING Ernie R. Lewis and Stephen E. Schwartz Brookhaven National Laboratory, Upton, NY 11933 ses@bnl.gov elewis@bnl.gov MOMENTS FROM MEASUREMENTS As each of the measured quantities is linear in the size distribution dn/dr, it is possible to construct linear combinations of measurements that yield

98

Electric dipole moments, from e to tau  

E-Print Network (OSTI)

We derive an upper limit on the electric dipole moment (EDM) of the tau-lepton, which follows from the precision measurements of the electron EDM.

Grozin, A G; Rudenko, A S

2008-01-01T23:59:59.000Z

99

Quantum-mechanical description of spin-1 particles with electric dipole moments  

E-Print Network (OSTI)

The Proca-Corben-Schwinger equations for a spin-1 particle with an anomalous magnetic moment are added by a term describing an electric dipole moment, then they are reduced to a Hamiltonian form, and finally they are brought to the Foldy-Wouthuysen representation. Relativistic equations of motion are derived. The needed agreement between quantum-mechanical and classical relativistic equations of motion is proved. The scalar and tensor electric and magnetic polarizabilities of pointlike spin-1 particles (W bosons) are calculated for the first time.

Alexander J. Silenko

2013-03-26T23:59:59.000Z

100

Almost Exact Sum Rules for Nucleon Moments From An Infinite Dimensional Algebra  

SciTech Connect

Recently there has been a great surge of interest in almost-exact sum rules for the magnetic moments of nucleons. (By almost-exact we mean: exact to all orders in the strong couplings but only the lowest order in electromagnetic and weak couplings.) Besides providing a means for calculation of the magnetic moments on the same level as the calculation of GA/GV by Adler and Weisberger these sum rules, taken together with the Adler-Weisberger sum rule, constitute a useful tool for investigating the nature of the dynamical approximations that underlie higher symmetry schemes.

Beg, M.A. B.

1966-07-25T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Moment invariants to affine transformation of colours  

Science Conference Proceedings (OSTI)

Most colour descriptors are not robust because they are constructed for simple colour transformations, such as a diagonal-offset transformation. In this paper, a type of colour descriptor is proposed which is composed of rational expression of moments ... Keywords: Affine transformation, Colour, Image retrieval, Moment invariants, Pattern recognition

Ming Gong, Hua Li, Weiguo Cao

2013-08-01T23:59:59.000Z

102

Chiral Anomaly and Decay of Color Electric Field  

E-Print Network (OSTI)

Using the formula of chiral anomaly, we discuss the pair production of quarks under color electric field $\\vec{E}$ without addressing explicit formula of quark's wavefunctions. The production is assumed to occur under the effect of color magnetic field $\\vec{B}$ as well as the color electric field. We obtain the life time $t_c$ of the color electric field in the limit of $B\\gg E$. Applying it to the glasma in high-energy heavy-ion collisions, we find that $t_c\\simeq 10Q_s^{-1}$ with saturation momentum $Q_s$.

Aiichi Iwazaki

2009-04-09T23:59:59.000Z

103

Anomalies of Nuclear Criticality, Revision 6  

SciTech Connect

This report is revision 6 of the Anomalies of Nuclear Criticality. This report is required reading for the training of criticality professionals in many organizations both nationally and internationally. This report describes many different classes of nuclear criticality anomalies that are different than expected.

Clayton, E. D.; Prichard, Andrew W.; Durst, Bonita E.; Erickson, David; Puigh, Raymond J.

2010-02-19T23:59:59.000Z

104

Tir (Aster) Geothermal Anomalies | Open Energy Information  

Open Energy Info (EERE)

Tir (Aster) Geothermal Anomalies Tir (Aster) Geothermal Anomalies Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Tir (Aster) Geothermal Anomalies Details Activities (1) Areas (1) Regions (0) Abstract: The focus of this research is the detection of shallow thermal anomalies for geothermal exploration and field management. The objective of this paper is to outline the steps involved in applying thermal infrared imagery (TIR) for this task. This process is part of an ongoing project at the Energy & Geoscience Institute (EGI), where we are developing a methodology to use daytime and nighttime thermal infrared imagery produced by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) to map shallow thermal anomalies. Kinetic temperature images

105

Electric Dipole Moments of Fundamental Particles  

E-Print Network (OSTI)

Electric dipole moment (EDM) experiments are at the fore-front of search for physics beyond the standard model. The next generation searches promise to improve by several orders of magnitude the current EDM sensitivity levels.

Yannis K. Semertzidis

2004-01-13T23:59:59.000Z

106

Machine learning for host-based anomaly detection  

Science Conference Proceedings (OSTI)

Anomaly detection techniques complement, signature based methods for intrusion detection. Machine learning approaches are applied to anomaly detection for automated learning and detection. Traditional host-based anomaly detectors model system call sequences ...

Gaurav Tandon / Philip K. Chan

2008-01-01T23:59:59.000Z

107

Application of Moment Invariants to Automated Microstructure Analysis  

Science Conference Proceedings (OSTI)

On-Site Speaker (Planned), Lily Nguyen. Abstract Scope, Moment invariants are algebraic combinations of the 2-D or 3-D cartesian moments of an object's ...

108

The electric charge and magnetic moment of neutral fundamental particles  

E-Print Network (OSTI)

The article focuses on the issue of the two definitions of charge, mainly the gauge charge and the effective charge of fundamental particles. Most textbooks on classical electromagnetism and quantum field theory only works with the gauge charges while the concept of the induced charge remains unattended. In this article it has been shown that for intrinsically charged particles both of the charges remain the same but there can be situations where an electrically neutral particle picks up some electrical charge from its plasma surrounding. The physical origin and the scope of application of the induced charge concept has been briefly discussed in the article.

Kaushik Bhattacharya

2009-05-27T23:59:59.000Z

109

Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments  

E-Print Network (OSTI)

Ma25 ZP A327 157 (87) 4492 295 ps 5- +2.6(5) IPAD 1974He13 PR C10 919 (74) 20 Ca 41 0 1.0x10 5 y 7 Research NP Nuclear Physics NuoC Nuovo Cimento NuoCL Nuovo Cimento Letters OptL Optics Letters ORNL Oak) +0.822567(3) [2H] N ZNat 23a 1202 (68)/PL A25 440 (67)/ ORNL-1775 (54) -0.00083(8) st [7Li] MB,R CPL

110

Time Series Graphs of Global and Hemispheric Temperature Anomalies...  

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

Time Series Graphs of Global and Hemispheric Temperature Anomalies graphics Graph - Global and Hemispheric Annual Temperature Anomalies, 1850-2012 graphics Graph - Northern...

111

Life Span of Subseasonal Coupled Anomalies  

Science Conference Proceedings (OSTI)

The impact of the local phase relationship between the low-level atmospheric circulation and the sea surface temperature (SST) on the duration of atmospheric anomalies is statistically evaluated. Using 5-day-average data from the NCEP–NCAR ...

Malaquías Peña; Ming Cai; Eugenia Kalnay

2004-04-01T23:59:59.000Z

112

TRENDS: Global and Hemispheric Temperature Anomalies  

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

Global and Hemispheric Temperature Anomalies - Land and Marine Instrumental Records graphics Graphics data Data Investigators P. D. Jones1, D. E. Parker2, T. J. Osborn1, and K. R....

113

Defining and Estimating Global Mean Temperature Anomalies  

Science Conference Proceedings (OSTI)

Methods used to quantify temperature changes of the earth must he assessed relative to an appropriate definition of global mean temperature. In this paper, global mean temperature is defined and the adequacy of using weighted average anomalies to ...

Richard F. Gunst; Sabyasachi Basu; Robert Brunell

1993-07-01T23:59:59.000Z

114

Potential Vorticity Anomalies Associated with Squall Lines  

Science Conference Proceedings (OSTI)

This study involves observations and model simulations of potential vorticity anomalies in the wake of midlatitude squall lines. Using data from the Oklahoma–Kansas PRE-STORM experiment, we analyze potential vorticity fields near two squall lines—...

Rolf F. A. Hertenstein; Wayne H. Schubert

1991-07-01T23:59:59.000Z

115

Science as an Anomaly-Driven Enterprise  

E-Print Network (OSTI)

Anomalous data lead to scientific discoveries. Although machine learning systems can be forced to resolve anomalous data, these systems use general learning algorithms to do so. To determine whether anomaly-driven approaches to discovery produce more accurate models than the standard approaches, we built a program called Kalpana. We also used Kalpana to explore means for identifying those anomaly resolutions that are acceptable to domain experts. Our experiments indicated that anomaly-driven approaches can lead to a richer set of model revisions than standard methods. Additionally we identified semantic and syntactic measures that are significantly correlated with the acceptability of model revisions. These results suggest that by interpreting data within the context of a model and by interpreting model revisions within the context of domain knowledge, discovery systems can more readily suggest accurate and acceptable anomaly resolutions.

Will Bridewell; Will Bridewell Phd

2004-01-01T23:59:59.000Z

116

Reanalysis of the Reactor Neutrino Anomaly  

E-Print Network (OSTI)

We reanalyze the reactor neutrino anomaly, wherein it is suggested that only about 94% of the emitted antineutrino flux was detected in short baseline experiments. We find that the form of the corrections that lead to the anomaly are very uncertain for the 30% of the flux that is determined by forbidden beta-decay transitions. This uncertainty was estimated in four ways and is larger than the size of the anomaly, and is unlikely to be reduced without accurate direct measurements of the antineutrino flux. Neutrino physics conclusions based on the original anomaly need to be revisited, as do oscillation analyses that assumed that the antineutrino flux is known to better than ~5%.

A. C. Hayes; J. L. Friar; G. T. Garvey; Guy Jonkmans

2013-09-17T23:59:59.000Z

117

Magnetization of neutron star matter  

E-Print Network (OSTI)

The magnetization of neutron star matter in magnetic fields is studied by employing the FSUGold interaction. It is found that the magnetic susceptibilities of the charged particles (proton, electron and muon) can be larger than that of neutron. The effects of the anomalous magnetic moments (AMM) of each component on the magnetic susceptibility are examined in detail. It is found that the proton and electron AMM affect their respective magnetic susceptibility evidently in strong magnetic fields. In addition, they are the protons instead of the electrons that contribute most significantly to the magnetization of the neutron star matter in a relative weak magnetic field, and the induced magnetic field due to the magnetization can be appear to be very large. Finally, the effect of the density-dependent symmetry energy on the magnetization is discussed.

Dong, Jianmin; Gu, Jianzhong

2013-01-01T23:59:59.000Z

118

Fast computation of geometric moments using a symmetric kernel  

Science Conference Proceedings (OSTI)

This paper presents a novel set of geometric moments with symmetric kernel (SGM) obtained using an appropriate transformation of image coordinates. By using this image transformation, the computational complexity of geometric moments (GM) is reduced ... Keywords: Computation, Efficient representation, Fast computation, Geometric moments with symmetric kernel (SGM), Invariant properties, Numerical instability, Symmetrical property, Zernike moments

Chong-Yaw Wee; Raveendran Paramesran; R. Mukundan

2008-07-01T23:59:59.000Z

119

$?$ electric dipole moment with polarized beams  

E-Print Network (OSTI)

High luminosity Super B/Flavor factories, near and on top of the $\\Upsilon$ resonances, allow for a detailed investigation of CP-violation in $\\tau$ physics. In particular, bounds on the $\\tau$ electric dipole moment can be obtained from CP-odd observables. We perform an independent analysis from other low and high energy data. For polarized electron beam a CP-odd asymmetry, associated to the normal polarization term, can be used to set stringent bounds on the $\\tau$ electric dipole moment.

G. A. González-Sprinberg; J. Bernabéu; J. Vidal

2007-07-11T23:59:59.000Z

120

Radioactive anomaly discrimination from spectral ratios  

DOE Patents (OSTI)

A method for discriminating a radioactive anomaly from naturally occurring radioactive materials includes detecting a first number of gamma photons having energies in a first range of energy values within a predetermined period of time and detecting a second number of gamma photons having energies in a second range of energy values within the predetermined period of time. The method further includes determining, in a controller, a ratio of the first number of gamma photons having energies in the first range and the second number of gamma photons having energies in the second range, and determining that a radioactive anomaly is present when the ratio exceeds a threshold value.

Maniscalco, James; Sjoden, Glenn; Chapman, Mac Clements

2013-08-20T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Holography and Anomaly Matching for Resonances  

E-Print Network (OSTI)

We derive a universal relation for the transverse part of triangle anomalies within a class of theories whose gravity dual is described by the Yang-Mills-Chern-Simons theory. This relation provides a set of sum rules involving the masses, decay constants and couplings between resonances, and leads to the formulas for the matrix elements of the vector and axial currents in the presence of the soft electromagnetic field. We also discuss that this relation is valid in real QCD at least approximately. This may be regarded as the anomaly matching for resonances as an analogue of that for the massless excitations in QCD.

Dam T. Son; Naoki Yamamoto

2010-10-04T23:59:59.000Z

122

New limits on the ordered moments in ?-Pu and Ga-stabilized ?-Pu  

E-Print Network (OSTI)

We present the first µSR measurements ever performed on elemental Pu, and set the most stringent upper limits to date on the magnitude of the ordered moment µord in ?-Pu and ?-stabilized Pu (alloyed with 4.3 at. % Ga). Assuming a nominal hyperfine coupling field of 1 kOe/µB we find µord ? 10 ?3 µB at T ? = 4 K. Key words: plutonium magnetism, f-electron, µSR 1.

R. H. Heffner A; G. D. Morris A

2005-01-01T23:59:59.000Z

123

Electric dipole moment of light nuclei  

Science Conference Proceedings (OSTI)

We examine the sensitivity of the deuteron Electric Dipole Moment (EDM) to variation in the nucleon-nucleon interaction. In particular, we write the EDM as a sum of two terms, one depends on the target wave function, the second on intermediate multiple scattering states in the {sup 3}P{sub 1} channel. This second contribution is sensitive to off-shell behavior of the {sup 3}P{sub 1} amplitude.

Gibson, Benjamin [Los Alamos National Laboratory; Afnan, I R [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

124

Electric dipole moment of light nuclei  

Science Conference Proceedings (OSTI)

We examine the sensitivity of the deuteron Electric Dipole Moment (EDM) to variation in the nucleon-nucleon interaction. In particular, we write the EDM as a sum of two terms, one depends on the target wave function, the second on intermediate multiple scattering states in the {sup 3}P{sub 1} channel. This second contribution is sensitive to off-shell behavior of the {sup 3}P{sub 1} amplitude.

Afnan, Iraj R. [School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide 5001 (Australia); Gibson, Benjamin F. [Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

2010-07-27T23:59:59.000Z

125

The investigation of anomalous magnetization in the Raft River valley,  

Open Energy Info (EERE)

investigation of anomalous magnetization in the Raft River valley, investigation of anomalous magnetization in the Raft River valley, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: The investigation of anomalous magnetization in the Raft River valley, Idaho Details Activities (1) Areas (1) Regions (0) Abstract: Cassia County Idaho; clastic sediments; economic geology; exploration; geophysical methods; geophysical surveys; geothermal energy; gravel; ground methods; Idaho; isothermal remanent magnetization; magnetic anomalies; magnetic methods; magnetic properties; magnetic susceptibility; magnetization; paleomagnetism; Raft River basin; remanent magnetization; sediments; surveys; United States Author(s): Anderson, L.A.; Mabey, D.R. Published: Abstracts - Society of Exploration Geophysicists International

126

Essays on set estimation and inference with moment inequalities  

E-Print Network (OSTI)

This thesis explores power and consistency of estimation and inference procedures with moment inequalities, and applications of the moment inequality framework to estimation of frontiers in finance. In the first chapter, ...

Menzel, Konrad, Ph. D. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

127

The NIMA Method for Improved Moment Estimation from Doppler Spectra  

Science Conference Proceedings (OSTI)

The NCAR Improved Moments Algorithm (NIMA) for estimating moments from wind measurement devices that measure Doppler spectra as a function of range is described in some detail. Although NIMA's main application has been for real-time processing of ...

Corinne S. Morse; Robert K. Goodrich; Larry B. Cornman

2002-03-01T23:59:59.000Z

128

Short-Term Climatic Fluctuations Forced by Thermal Anomalies  

Science Conference Proceedings (OSTI)

A two-level, global, spectral model is used to study the response of the atmosphere to sea surface temperature anomalies. Two sea surface temperature anomaly patterns are investigated. The first, called the El Niño pattern (Experiment 1), ...

Adel F. Hanna; Duane E. Stevens; Elmar R. Reiter

1984-01-01T23:59:59.000Z

129

Gravity Waves Generated by Sheared Potential Vorticity Anomalies  

Science Conference Proceedings (OSTI)

The gravity waves (GWs) generated by potential vorticity (PV) anomalies in a rotating stratified shear flow are examined under the assumptions of constant vertical shear, two-dimensionality, and unbounded domain. Near a PV anomaly, the associated ...

François Lott; Riwal Plougonven; Jacques Vanneste

2010-01-01T23:59:59.000Z

130

An empirical comparison of monitoring algorithms for access anomaly detection  

Science Conference Proceedings (OSTI)

One of the major disadvantages of parallel programming with shared memory is the nondeterministic behavior caused by uncoordinated access to shared variables, known as access anomalies. Monitoring program execution to detect access anomalies ...

A. Dinning; E. Schonberg

1990-02-01T23:59:59.000Z

131

On the Prediction of India Monsoon Rainfall Anomalies  

Science Conference Proceedings (OSTI)

A complex of anomalies in the premonsoon large-scale circulation setting heralds the interannual variability of India summer monsoon rainfall. The most prominent precursors of precipitation anomalies are the latitude position of the upper-air ...

Stefan Hastenrath

1987-07-01T23:59:59.000Z

132

Some Considerations Relevant to Computing Average Hemispheric Temperature Anomalies  

Science Conference Proceedings (OSTI)

Three data bases of gridded surface temperature anomalies were used to assess the sensitivity of the average estimated Northern Hemisphere (NH) temperature anomaly to: 1) extreme gridpoint values and 2) zonal band contributions. Over the last 100 ...

S. L. Grotch

1987-07-01T23:59:59.000Z

133

X-ray absorption and magnetic circular dichroism studies of Co2FeAl in magnetic tunnel junctions  

SciTech Connect

The bulk magnetic moment and the element specific magnetic moment of Co{sub 2}FeAl thin films were examined as a function of annealing temperature by alternating gradient magnetometer (AGM) and X-ray absorption spectroscopy (XAS)/X-ray magnetic circular dichroism (XMCD), respectively. A high magnetic moment can be achieved for all annealing temperatures and the predicted bulk and interface magnetic moment of about 5 {tilde A}{sub B} are reached via heating. We will also present tunnel magnetoresistance (TMR) values of up to 153% at room temperature and 260% at 13 K for MgO based magnetic tunnel junctions (MTJs) with Co{sub 2}FeAl and Co-Fe electrodes.

Ebke, D.; Kugler, Z.; Thomas, P.; Schebaum, O.; Schafers, M.; Nissen, D.; Schmalhorst, J.; Hutten, A.; Arenholz, E.; Thomas, A.

2010-01-11T23:59:59.000Z

134

The Electric Dipole Moment of the Nucleons in Holographic QCD  

E-Print Network (OSTI)

We introduce the strong CP-violation in the framework of AdS/QCD model and calculate the electric dipole moments of nucleons as well as the CP-violating pion-nucleon coupling. Our holographic estimate of the electric dipole moments gives for the neutron d_n=1.08 X 10^{-16} theta (e cm), which is comparable with previous estimates. We also predict that the electric dipole moment of the proton should be precisely the minus of the neutron electric dipole moment, thus leading to a new sum rule on the electric dipole moments of baryons.

Hong, Deog Ki; Siwach, Sanjay; Yee, Ho-Ung

2007-01-01T23:59:59.000Z

135

Dielectric anomaly in coupled rotor systems  

E-Print Network (OSTI)

The correlated dynamics of coupled quantum rotors carrying electric dipole moment is theoretically investigated. The energy spectra of coupled rotors as a function of dipolar interaction energy is analytically solved. The calculated dielectric susceptibilities of the system show the peculiar temperature dependence different from that of isolated rotors.

Hiroyuki Shima; Tsuneyoshi Nakayama

2004-07-02T23:59:59.000Z

136

ADWICE – anomaly detection with real-time incremental clustering  

Science Conference Proceedings (OSTI)

Anomaly detection, detection of deviations from what is considered normal, is an important complement to misuse detection based on attack signatures. Anomaly detection in real-time places hard requirements on the algorithms used, making many proposed ... Keywords: adaptability, anomaly detection, clustering, intrusion detection, realtime

Kalle Burbeck; Simin Nadjm-Tehrani

2004-12-01T23:59:59.000Z

137

Challenging the supremacy of traffic matrices in anomaly detection  

Science Conference Proceedings (OSTI)

Multiple network-wide anomaly detection techniques proposed in the literature define an anomaly as a statistical outlier in aggregated network traffic. The most popular way to aggregate the traffic is as a Traffic Matrix, where the traffic is ... Keywords: anomaly detection, traffic aggregation

Augustin Soule; Fernando Silveira; Haakon Ringberg; Christophe Diot

2007-10-01T23:59:59.000Z

138

Data mining methods for anomaly detection KDD-2005 workshop report  

Science Conference Proceedings (OSTI)

For many applications, data mining systems are required to detect anomalous (abnormal, unmodeled, or unexpected) observations. This has so far proven to be a difficult challenge because anomalies are usually considered to be "non-normal" observations, ... Keywords: anomalies, data mining, detection of anomalies in data, machine learning

Dragos Margineantu; Stephen Bay; Philip Chan; Terran Lane

2005-12-01T23:59:59.000Z

139

Life Cycles of Persistent Anomalies. Part II: The Development of Persistent Negative Height Anomalies over the North Pacific Ocean  

Science Conference Proceedings (OSTI)

The present study extends our previous work on the life cycles of persistent anomalies by providing more comprehensive analyses of the synoptic and dynamical characteristics associated with the developments of the anomalies. We focus here on the ...

Randall M. Dole; Robert X. Black

1990-04-01T23:59:59.000Z

140

Capacitance Probe for Detection of Anomalies in Nonmetallic Plastic Pipe  

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

Capacitance Probe for Detection of Anomalies in Capacitance Probe for Detection of Anomalies in Nonmetallic Plastic Pipe Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is seeking collaborative research and licensing partners interested in implementing United States Patent Number 7,839,282 entitled "Capacitance Probe for Detection of Anomalies in Nonmetallic Plastic Pipe." Disclosed in this patent is an analysis of materials using a capacitive sensor to detect anomalies in nonmetallic plastic pipe through comparison of measured capacitances. The capacitive sensor is used in conjunction with a capacitance measurement device, a location device, and a processor to generate a capacitance versus location output for the detection and localization of anomalies

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Flavorful hybrid anomaly-gravity mediation  

SciTech Connect

We consider supersymmetric models where anomaly and gravity mediation give comparable contributions to the soft terms and discuss how this can be realized in a five-dimensional brane world. The gaugino mass pattern of anomaly mediation is preserved in such a hybrid setup. The flavorful gravity-mediated contribution cures the tachyonic slepton problem of anomaly mediation. The supersymmetric flavor puzzle is solved by alignment. We explicitly show how a working flavor-tachyon link can be realized with Abelian flavor symmetries and give the characteristic signatures of the framework, including O(1) slepton mass splittings between different generations and between doublets and singlets. This provides opportunities for same flavor dilepton edge measurements with missing energy at the Large Hadron Collider (LHC). Rare lepton decay rates could be close to their current experimental limit. Compared to pure gravity mediation, the hybrid model is advantageous because it features a heavy gravitino which can avoid the cosmological gravitino problem of gravity-mediated models combined with leptogenesis.

Gross, Christian; Hiller, Gudrun [Institut fuer Physik, Technische Universitaet Dortmund, D-44221 Dortmund (Germany)

2011-05-01T23:59:59.000Z

142

Optimization under moment, robust, and data-driven models of uncertainty  

E-Print Network (OSTI)

We study the problem of moments and present two diverse applications that apply both the hierarchy of moment relaxation and the moment duality theory. We then propose a moment-based uncertainty model for stochastic ...

Doan, Xuan Vinh

2010-01-01T23:59:59.000Z

143

Analytical solution of the kinetic equation for a uniform plasma in a magnetic field  

SciTech Connect

The kinetic equation for a single-component uniform plasma in a magnetic field is analytically solved by the moment method. The linear system of ordinary differential equations for the moments is decomposed into subsystems of lower dimensions by a geometric method. The eigensystem of each subsystem shows that parallel moments decay monotonically, but perpendicular lth harmonic moments decay while oscillating with the l,l-2,...,-th harmonics of gyrofrequency. A generalization to a multicomponent plasma is discussed.

Ji, Jeong-Young; Held, Eric D. [Department of Physics, Utah State University, Logan, Utah 84322 (United States)

2010-07-15T23:59:59.000Z

144

Nuclear electric dipole moment of 3He  

Science Conference Proceedings (OSTI)

In the no-core shell model (NCSM) framework, we calculate the {sup 3}He electric dipole moment (EDM) generated by parity- and time-reversal violation in the nucleon-nucleon interaction. While the results are somehow sensitive to the interaction model chosen for the strong two- and three-body interactions, we demonstrate the pion-exchange dominance to the EDM of {sup 3}He, if the coupling constants for {pi}, {rho} and {omega}-exchanges are of comparable magnitude, as expected. Finally, our results suggest that a measurement of {sup 3}He EDM would be complementary to the currently planned neutron and deuteron experiments, and would constitute a powerful constraint to the models of the pion P- and T-violating interactions.

Stetcu, Ionel [Los Alamos National Laboratory; Friar, J L [Los Alamos National Laboratory; Hayes, A C [Los Alamos National Laboratory; Liu, C P [UNIV WISCONSIN; Navratil, P [LIVERMORE NAT LAB

2008-01-01T23:59:59.000Z

145

Current-induced switching of magnetic domains to a perpendicular configuration  

Science Conference Proceedings (OSTI)

In a ferromagnet{endash}normal-metal{endash}ferromagnet trilayer, a current flowing perpendicularly to the layers creates a torque on the magnetic moments of the ferromagnets. When one of the contacts is superconducting, the torque not only favors parallel or antiparallel alignment of the magnetic moments, as is the case for two normal contacts, but can also favor a configuration where the two moments are perpendicular. In addition, whereas the conductance for parallel and antiparallel magnetic moments is the same, signalling the absence of giant magnetoresistance in the usual sense, the conductance is greater in the perpendicular configuration. Thus, a negative magnetoconductance is predicted, in contrast with the usual giant magnetoresistance.

Waintal, X.; Brouwer, P. W.

2001-06-01T23:59:59.000Z

146

Numerical Regularized Moment Method of Arbitrary Order for Boltzmann-BGK Equation  

Science Conference Proceedings (OSTI)

We introduce a numerical method for solving Grad's moment equations or regularized moment equations for an arbitrary order of moments. In our algorithm, we do not explicitly need the moment equations. Instead, we directly start from the Boltzmann equation ... Keywords: Boltzmann-BGK equation, Grad's moment method, regularized moment-equations

Zhenning Cai; Ruo Li

2010-08-01T23:59:59.000Z

147

On the moment of inertia of a quantum harmonic oscillator  

SciTech Connect

An original method for calculating the moment of inertia of the collective rotation of a nucleus on the basis of the cranking model with the harmonic-oscillator Hamiltonian at arbitrary frequencies of rotation and finite temperature is proposed. In the adiabatic limit, an oscillating chemical-potential dependence of the moment of inertia is obtained by means of analytic calculations. The oscillations of the moment of inertia become more pronounced as deformations approach the spherical limit and decrease exponentially with increasing temperature.

Khamzin, A. A., E-mail: airat.khamzin@rambler.ru; Sitdikov, A. S. [Kazan (Volga region) Federal University (Russian Federation)] [Kazan (Volga region) Federal University (Russian Federation); Nikitin, A. S. [Kazan State Power-Engineering University (Russian Federation)] [Kazan State Power-Engineering University (Russian Federation); Roganov, D. A. [Open Corporation Joint-Stock Commercial Investment Bank Tatfondbank (Russian Federation)] [Open Corporation Joint-Stock Commercial Investment Bank Tatfondbank (Russian Federation)

2013-04-15T23:59:59.000Z

148

Geothermal: Sponsored by OSTI -- Full moment tensor and source...  

Office of Scientific and Technical Information (OSTI)

Full moment tensor and source location inversion based on full waveform adjoint inversion: application at the Geysers geothermal field Geothermal Technologies Legacy Collection...

149

Capturing Those In-Between Moments: NIST Solves Timing ...  

Science Conference Proceedings (OSTI)

Capturing Those In-Between Moments: NIST Solves Timing Problem in Molecular ... Colorized simulation of what happens to 1100 carbon atoms in a ...

2012-11-13T23:59:59.000Z

150

Leptonic dipole moments in the left-right supersymmetric ... - Springer  

Science Conference Proceedings (OSTI)

doscalar Higgs boson can give significant contributions to dipole moments at two loop level, coming from Barr-Zee. Fig. 2. Chargino, neutralino and left-right ...

151

Magnetic properties of the nucleon in a uniform background field  

E-Print Network (OSTI)

We present results for the magnetic moment and magnetic polarisability of the neutron and the magnetic moment of the proton. These results are calculated using the uniform background field method on 32^3 x 64 dynamical QCD lattices provided by the PACS-CS collaboration as part of the ILDG. We use a uniform background magnetic field quantised by the periodic spatial volume. We investigate ways to improve the effective energy plots used to calculate magnetic polarisabilities, including the use of correlation matrix techniques with various source smearings.

Thomas Primer; Waseem Kamleh; Derek Leinweber; Matthias Burkardt

2013-07-05T23:59:59.000Z

152

Active current sheets and hot flow anomalies in Mercury's bow shock  

E-Print Network (OSTI)

Hot flow anomalies (HFAs) represent a subset of solar wind discontinuities interacting with collisionless bow shocks. They are typically formed when the normal component of motional (convective) electric field points toward the embedded current sheet on at least one of its sides. The core region of an HFA contains hot and highly deflected ion flows and rather low and turbulent magnetic field. In this paper, we report first observations of HFA-like events at Mercury identified over a course of two planetary years. Using data from the orbital phase of the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) mission, we identify a representative ensemble of active current sheets magnetically connected to Mercury's bow shock. We show that some of these events exhibit unambiguous magnetic and particle signatures of HFAs similar to those observed earlier at other planets, and present their key physical characteristics. Our analysis suggests that Mercury's bow shock does not only mediate the flo...

Uritsky, V M; Boardsen, S A; Sundberg, T; Raines, J M; Gershman, D J; Collinson, G; Sibeck, D; Khazanov, G V; Anderson, B J; Korth, H

2013-01-01T23:59:59.000Z

153

Lester Meadow, Washington- A Geothermal Anomaly | Open Energy Information  

Open Energy Info (EERE)

Lester Meadow, Washington- A Geothermal Anomaly Lester Meadow, Washington- A Geothermal Anomaly Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Lester Meadow, Washington- A Geothermal Anomaly Details Activities (2) Areas (1) Regions (0) Abstract: Exploration of the Lester Hot Springs for geothermal potential found that a natural meadow adjacent to the hot springs represents a geothermal anomaly. This conclusion is supported by an anomaly in a thermal infrared survey, high levels of fluorine and boron from a soil survey, and the lack forest cover in the Lester meadow. These vegetation anomalies may be more common in the Cascade Mountains than realized and may be a useful indicator of the extent of geothermal activity at a location. Burlington Northern (BN) started conducting geothermal exploration in 1974 once the

154

Machine Learning for Host-based Anomaly Detection by  

E-Print Network (OSTI)

Anomaly detection techniques complement signature based methods for intrusion detection. Machine learning approaches are applied to anomaly detection for automated learning and detection. Traditional host-based anomaly detectors model system call sequences to detect novel attacks. This dissertation makes four key contributions to detect host anomalies. First, we present an unsupervised approach to clean training data using novel representations for system call sequences. Second, supervised learning with system call arguments and other attributes is proposed for enriched modeling. Third, techniques to increase model coverage for improved accuracy are presented. Fourth, we propose spatio-temporal modeling to detect suspicious behavior for mobile hosts. Experimental results on various data sets indicate that our techniques are more effective than traditional methods in capturing attack-based host anomalies. Additionally, our supervised methods create succint models and the computational overhead incurred is reasonable for an online anomaly detection system. iii Acknowledgements An ancient saying in Sanskrit: Matri devo bhava (revere your mother), pitri devo

Gaurav Tandon; Gaurav Tandon; Philip K. Chan, Ph.D.; Marius C. Silaghi, Ph.D.; Georgios C. Anagnostopoulos, Ph.D.; Gaurav Tandon; Dissertation Advisor; Philip K. Chan, Ph.D.

2008-01-01T23:59:59.000Z

155

The search for permanent electric dipole moments  

SciTech Connect

Permanent electric dipole moments (EDMs) of fundamental systems with spin - particles, nuclei, atoms or molecules violate parity and time reversal invariance. Invoking the CPT theorem, time reversal violation implies CP violation. Although CP-violation is implemented in the standard electro-weak theory, EDM generated this way remain undetectably small. However, this CP-violation also appears to fail explaining the observed baryon asymmetry of our universe. Extensions of the standard theory usually include new sources of CP violation and often predict sizeable EDMs. EDM searches in different systems are complementary and various efforts worldwide are underway and no finite value has been established yet. The prototype of an EDM search is the pursuit of the EDM of the neutron. It has the longest history and at the same time is at the forefront of present research. The talk aims at giving an overview of the field with emphasis on our efforts within an international collaboration at PSI, nedm.web.psi.ch.

Kirch, Klaus [PSI-Villigen - ETH Zürich

2013-02-13T23:59:59.000Z

156

Electron Electric Dipole Moment induced by Octet-Colored Scalars  

E-Print Network (OSTI)

An appended sector of two octet-colored scalars, each an electroweak doublet, is an interesting extension of the simple two Higgs doublet model motivated by the minimal flavor violation. Their rich CP violating interaction gives rise to a sizable electron electric dipole moment, besides the quark electric dipole moment via the two-loop contribution of Barr-Zee mechanism.

Jae Ho Heo; Wai-Yee Keung

2007-12-31T23:59:59.000Z

157

Moment matching approximation of Asian basket option prices  

Science Conference Proceedings (OSTI)

In this paper we propose some moment matching pricing methods for European-style discrete arithmetic Asian basket options in a Black & Scholes framework. We generalize the approach of [M. Curran, Valuing Asian and portfolio by conditioning on the geometric ... Keywords: 60J65, 91B28, Asian basket option, Log-extended-skew-normal, Moment matching, Sum of non-independent random variables

Griselda Deelstra; Ibrahima Diallo; Michèle Vanmaele

2010-06-01T23:59:59.000Z

158

Electric dipole moments in U(1){sup '} models  

Science Conference Proceedings (OSTI)

We study electric dipole moments of electrons and protons in E(6)-inspired supersymmetric models with an extra U(1) invariance. Compared to the Minimal Supersymmetric Standard Model, in addition to offering a natural solution to the {mu} problem and predicting a larger mass for the lightest Higgs boson, these models are found to yield suppressed electric dipole moments.

Hayreter, Alper [Department of Physics, Izmir Institute of Technology, IZTECH, TR35430 (Turkey); Department of Physics, Concordia University, 7141 Sherbrooke West, Montreal, Quebec, H4B 1R6 (Canada); Sabanci, Asli [Department of Physics, Izmir Institute of Technology, IZTECH, TR35430 (Turkey); Solmaz, Levent; Solmaz, Saime [Department of Physics, Balikesir University, Balikesir, TR10145 (Turkey)

2008-09-01T23:59:59.000Z

159

A generalized method of moments for closed queueing networks  

Science Conference Proceedings (OSTI)

We introduce a new solution technique for closed product-form queueing networks that generalizes the Method of Moments (MoM), a recently proposed exact algorithm that is several orders of magnitude faster and memory efficient than the established Mean ... Keywords: Computational algorithms, Method of moments, Queueing network models

Giuliano Casale

2011-02-01T23:59:59.000Z

160

Detection of Surface Temperature Anomalies in the Coso Geothermal...  

Open Energy Info (EERE)

of Surface Temperature Anomalies in the Coso Geothermal Field Using Thermal Infrared Remote Sensing Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference...

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

3D Magnetotelluric Characterization Of The Geothermal Anomaly...  

Open Energy Info (EERE)

where it can be associated with structural conditions, especially to the extensional event suffered by the island after the Alpine Orogeny. However, the origin of this anomaly...

162

IN SEARCH FOR THERMAL ANOMALIES IN THE COSO GEOTHERMAL FIELD...  

Open Energy Info (EERE)

IN SEARCH FOR THERMAL ANOMALIES IN THE COSO GEOTHERMAL FIELD (CALIFORNIA) USING REMOTE SENSING AND FIELD DATA Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home...

163

A Shallow Attenuating Anomaly Inside The Ring Fracture Of The...  

Open Energy Info (EERE)

Shallow Attenuating Anomaly Inside The Ring Fracture Of The Valles Caldera, New Mexico Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Shallow...

164

ARM - Evaluation Product - Corrected Moments in Antenna Coordinates  

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

ProductsCorrected Moments in Antenna Coordinates ProductsCorrected Moments in Antenna Coordinates Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Corrected Moments in Antenna Coordinates Site(s) SGP TWP General Description Raw moments from the scanning ARM precipitation radars (SAPRs) are subject to a number of instrumental and atmospheric phenomena that must be retrieved and corrected for. The Corrected Moments in Antenna Coordinates (CMAC) value-added product contains both raw data and fields that have been processed to: · correct for velocity aliasing · unfold and generate a cross-polarimetric phase difference that is monotonically increasing, removing impulses caused by non-uniform beam filling and phase shift on backscatter · recalculate specific differential phase using a 20-point Sobel filter on

165

Energy Dependence of High Moments for Net-proton Distributions  

Science Conference Proceedings (OSTI)

High moments of multiplicity distributions of conserved quantities are predicted to be sensitive to critical fluctuations. To understand the effect of the non-critical physics backgrounds on the proposed observable, we have studied various moments of net-proton distributions with AMPT, Hijing, Therminator and UrQMD models, in which no QCD critical point physics is implemented. It is found that the centrality evolution of various moments of net-proton distributions can be uniformly described by a superposition of emission sources. In addition, in the absence of critical phenomena, some moment products of net-proton distributions, related to the baryon number susceptibilities in Lattice QCD calculations, are predicted to be constant as a function of the collision centrality. We argue that a non-monotonic dependence of the moment products as a function of the beam energy may be used to locate the QCD critical point.

Luo, Xiaofeng; Mohanty, Bedangadas; Ritter, Hans Georg; Xu, Nu

2010-07-07T23:59:59.000Z

166

The Puzzle of the Flyby Anomaly  

E-Print Network (OSTI)

Close planetary flybys are frequently employed as a technique to place spacecraft on extreme solar system trajectories that would otherwise require much larger booster vehicles or may not even be feasible when relying solely on chemical propulsion. The theoretical description of the flybys, referred to as gravity assists, is well established. However, there seems to be a lack of understanding of the physical processes occurring during these dynamical events. Radio-metric tracking data received from a number of spacecraft that experienced an Earth gravity assist indicate the presence of an unexpected energy change that happened during the flyby and cannot be explained by the standard methods of modern astrodynamics. This puzzling behavior of several spacecraft has become known as the flyby anomaly. We present the summary of the recent anomalous observations and discuss possible ways to resolve this puzzle.

Slava G. Turyshev; Viktor T. Toth

2009-07-23T23:59:59.000Z

167

Chameleon effect and the Pioneer anomaly  

E-Print Network (OSTI)

The possibility that the apparent anomalous acceleration of the Pioneer 10 and 11 spacecraft may be due, at least in part, to a chameleon field effect is examined. A small spacecraft, with no thin shell, can have a more pronounced anomalous acceleration than a large compact body, such as a planet, having a thin shell. The chameleon effect seems to present a natural way to explain the differences seen in deviations from pure Newtonian gravity for a spacecraft and for a planet, and appears to be compatible with the basic features of the Pioneer anomaly, including the appearance of a jerk term. However, estimates of the size of the chameleon effect indicate that its contribution to the anomalous acceleration is negligible. We conclude that any inverse-square component in the anomalous acceleration is more likely caused by an unmodelled reaction force from solar-radiation pressure, rather than a chameleon field effect.

John D. Anderson; J. R. Morris

2012-04-12T23:59:59.000Z

168

Apparatus for Measurement of the Electric Dipole Moment of the Neutron using a Cohabiting Atomic-Mercury Magnetometer  

E-Print Network (OSTI)

A description is presented of apparatus used to carry out an experimental search for an electric dipole moment of the neutron, at the Institut Laue-Langevin (ILL), Grenoble. The experiment incorporated a cohabiting atomic-mercury magnetometer in order to reduce spurious signals from magnetic field fluctuations. The result has been published in an earlier letter; here, the methods and equipment used are discussed in detail.

C. A. Baker; Y. Chibane; M. Chouder; P. Geltenbort; K. Green; P. G. Harris; B. R. Heckel; P. Iaydjiev; S. N. Ivanov; I. Kilvington; S. K. Lamoreaux; D. J. May; J. M. Pendlebury; J. D. Richardson; D. B. Shiers; K. F. Smith; M. van der Grinten

2013-05-31T23:59:59.000Z

169

Time discretisation applied to anomaly detection in a marine engine  

Science Conference Proceedings (OSTI)

An introduction to the problems associated with anomaly detection in a marine engine, explaining the benefits that the SAX representation brings to the field. Despite limitations in accuracy of the SAX representation in comparison with the normalised ... Keywords: anomaly detection, discretisation, symbolic aggregate approximation, time series

Ian Morgan; Honghai Liu; George Turnbull; David Brown

2007-09-01T23:59:59.000Z

170

Detection of process anomalies using an improved statistical learning framework  

Science Conference Proceedings (OSTI)

Maintenance technologies have been progressed from a time-based to a condition-based manner. The fundamental idea of condition-based maintenance (CBM) is built on the real-time diagnosis of impending failures and/or the prognosis of residual lifetime ... Keywords: Condition-based maintenance, Kernel regression, Process anomalies, Sensor anomalies, Statistical learning

Sang Ha An; Gyunyoung Heo; Soon Heung Chang

2011-03-01T23:59:59.000Z

171

Anomalies of Central England Temperature Classified by Air Source  

Science Conference Proceedings (OSTI)

Daily anomalies of mean central England temperature (CET), relative to daily 1961–90 climatology, are analyzed in terms of the source of the air estimated from fields of mean sea level pressure. The average CET anomaly for a given source and ...

David E. Parker

2009-03-01T23:59:59.000Z

172

EbAT: online methods for detecting utility cloud anomalies  

Science Conference Proceedings (OSTI)

The online detection of anomalies is a vital element of operations in datacenters and in utility clouds like Amazon EC2. Given ever-increasing data center sizes coupled with the complexities of systems software, applications, and workload patterns, such ... Keywords: anomaly detection, entropy, utility cloud, utility datacenter

Chengwei Wang

2009-11-01T23:59:59.000Z

173

Sixteen-moment approximation for a collisionless space plasma: Waves and instabilities  

Science Conference Proceedings (OSTI)

A study is carried out of waves and instabilities in an anisotropic collisionless plasma. In a strongly magnetized plasma, the velocity distributions along and across the magnetic field lines are different, which results in anisotropy of the total pressure and gives rise to an anisotropic heat flux. The fluid description of the plasma is based on the 16-moment integral transport equations, which are integral equations obtained from the Boltzmann-Vlasov kinetic equation. For small incompressible perturbations in a homogeneous plasma, the general dispersion relation implies that there are not only firehose modes, but also three additional modes, and that all four wave modes interact with each other if a heat flux is present. Heat fluxes do not change the properties of conventional firehose modes. The conditions for the onset of instabilities are investigated as functions of the parameters of the problems. Qualitative estimates for conditions typical of the solar corona are presented.

Kuznetsov, V. D. [Russian Academy of Sciences, Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation (Russian Federation); Dzhalilov, N. S. [Academy of Sciences of Azerbaijan, Shemakha Astrophysical Observatory (Azerbaijan)

2009-11-15T23:59:59.000Z

174

Magnetic resonance as a channel of directed transmission of electromagnetic energy in animate nature  

E-Print Network (OSTI)

The phenomenon of magnetic resonance (either NMR or ESR) is a responce of atomic (molecular) system to the external electromagnetic effect. Electrons and nuclei, which possess magnetic moment, are the "magnetic antennas" in the biosystem "human being". They are able to receive (radiate) electromagnetic energy selectively in coordinates $H$ (magnetic field), $\

E. Ya. Fursa

2002-12-09T23:59:59.000Z

175

Detection of Surface Temperature Anomalies in the Coso Geothermal Field  

Open Energy Info (EERE)

Detection of Surface Temperature Anomalies in the Coso Geothermal Field Detection of Surface Temperature Anomalies in the Coso Geothermal Field Using Thermal Infrared Remote Sensing Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Detection of Surface Temperature Anomalies in the Coso Geothermal Field Using Thermal Infrared Remote Sensing Details Activities (1) Areas (1) Regions (0) Abstract: We use thermal infrared (TIR) data from the spaceborne ASTER instrument to detect surface temperature anomalies in the Coso geothermal field in eastern California. The identification of such anomalies in a known geothermal area serves as an incentive to apply similar markers and techniques to areas of unknown geothermal potential. We carried out field measurements concurrently with the collection of ASTER images. The field

176

Countintg Extra Dimensions: Magnetic Cherenkov Radiation from High Energy Neutrinos  

E-Print Network (OSTI)

In theories which require a space of dimension d>4, there is a natural mechanism of suppressing neutrino masses: while Standard Model fields are confined to a 3-brane, right handed neutrinos live in the bulk. Due to Kaluza-Klein excitations, the effective magnetic moments of neutrinos are enhanced. The effective magnetic moment is a monotonically growing function of the energy of the neutrino: consequently, high energy neutrinos can emit observable amounts of magnetic Cherenkov radiation. By observing the energy dependence of the magnetic Cherenkov radiation, one may be able to determine the number of compactified dimensions.

G. Domokos; Andrea Erdas; S. Kovesi-Domokos

2002-12-30T23:59:59.000Z

177

Ground Magnetics At Marysville Mt Area (Blackwell) | Open Energy  

Open Energy Info (EERE)

Ground Magnetics At Marysville Mt Area (Blackwell) Ground Magnetics At Marysville Mt Area (Blackwell) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground Magnetics At Marysville Mt Area (Blackwell) Exploration Activity Details Location Marysville Mt Area Exploration Technique Ground Magnetics Activity Date Usefulness not useful DOE-funding Unknown Notes A ground magnetic survey located no anomaly with an amplitude of more than 20 or 30 gammas that could be associated with the thermal anomaly, however the magnetic data did outline the Cretaceous stock in great detail and allow the removal from the gravity field of the effect of the stock. References D. D. Blackwell (Unknown) Exploration In A Blind Geothermal Area Near Marysville, Montana, Usa Retrieved from "http://en.openei.org/w/index.php?title=Ground_Magnetics_At_Marysville_Mt_Area_(Blackwell)&oldid=389390"

178

Seasonal Climatic Anomaly Types for the North Pacific Sector and Western North America  

Science Conference Proceedings (OSTI)

Recurrent patterns of seasonal sea level pressure anomaly over the North Pacific sector and western North America are objectively identified using correlation coefficients between anomaly maps as a pattern recognition device. Five major anomaly ...

T. J. Blasing; G. R. Lofgren

1980-06-01T23:59:59.000Z

179

Statistical Tools for Drop Size Distributions: Moments and Generalized Gamma  

Science Conference Proceedings (OSTI)

Several problems associated with drop size distributions are treated. For rainfall rate R or radar reflectivity Z high powers of the drop diameters must be taken into account. This paper suggests methods to deal with the relevant moments and to ...

A. N. Aufder Maur

2001-02-01T23:59:59.000Z

180

ARM - Evaluation Product - Mapped Moments to a Cartesian Grid  

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

ProductsMapped Moments to a Cartesian Grid ProductsMapped Moments to a Cartesian Grid Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Mapped Moments to a Cartesian Grid Site(s) SGP TWP General Description The Scanning ARM precipitation radars produce measurements of raw radar moments in antenna coordinates of range from and the azimuth and elevation of the antenna. Most numerical representations of the atmosphere tend to be in a Cartesian coordinate system using either height above mean sea level (or land surface in sigma coordinates) or pressure levels as a vertical scale. In addition to applying a correction for radar aliasing, correcting cross polarimetric phase difference for second trip returns and folding, recalculating specific differential phase (due to a configuration error on

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Baroclinic Interleaving Instability: A Second-Moment Closure Approach  

Science Conference Proceedings (OSTI)

Interleaving motions on a wide, baroclinic front are modeled using a second-moment closure to represent unresolved fluxes by turbulence and salt fingering. A linear perturbation analysis reveals two broad classes of unstable modes. First are scale-...

W. D. Smyth; H. Burchard; L. Umlauf

2012-05-01T23:59:59.000Z

182

Third moments of conserved charges in QCD phase diagram  

E-Print Network (OSTI)

We point out that the third moments of conserved charges, the baryon and electric charge numbers, and energy, as well as their mixed moments, change their signs around the QCD phase boundary in the temperature and baryon chemical potential plane. These signs can be measured in relativistic heavy ion collisions, and will give clear information on the phase structure of QCD and the state of the system in the early stage of relativistic heavy ion collisions. The behaviors of these moments on the temperature axis and at small quark chemical potential can be analyzed in lattice QCD simulations. We emphasize that the third moments obtained on the lattice, together with the experimental results, will provide a deep understanding about the QCD phase diagram and the location of the state created in heavy ion collisions.

Kitazawa, Masakiyo; Ejiri, Shinji

2009-01-01T23:59:59.000Z

183

SDP vs. LP relaxations for the moment approach in some ...  

E-Print Network (OSTI)

ity moment conditions, yields a sequence of semidefinite programs (or SDP ... of such processes is that their infinitesimal generator maps the polynomials into polynomials. ...... The monitoring statistic Yt based on the likelihood ratio, see [1],

184

Using Probability Density Functions to Derive Consistent Closure Relationships among Higher-Order Moments  

Science Conference Proceedings (OSTI)

Parameterizations of turbulence often predict several lower-order moments and make closure assumptions for higher-order moments. In principle, the low- and high-order moments share the same probability density function (PDF). One closure ...

Vincent E. Larson; Jean-Christophe Golaz

2005-04-01T23:59:59.000Z

185

Manifestations of nuclear anapole moments in solid state NMR  

E-Print Network (OSTI)

We suggest to use insulating garnets doped by rare earth ions for measurements of nuclear anapole moments. A parity violating shift of the NMR frequency arises due to the combined effect of the lattice crystal field and the anapole moment of the rare-earth nucleus. We show that there are two different observable effects related to frequency: 1) A shift of the NMR frequency in an external electric field applied to the solid. The value of the shift is about \\Delta \

T. N. Mukhamedjanov; O. P. Sushkov; J. M. Cadogan

2004-05-10T23:59:59.000Z

186

Solar Eclipse Anomalies and Wave Refraction  

E-Print Network (OSTI)

There is some inconclusive evidence that measurement devices sensitive to local gravitation exhibit anomalous behaviour during solar eclipses. We investigate if these findings can be incorporated into the standard general relativistic model of gravitation. The General Theory of Relativity (GTR) describes gravitation as the response of an object to local spacetime curvature. Gravitational waves travelling at the speed of light are then a necessary mechanism to maintain the required consistency between local curvature and distant gravitating mass. Gravitational waves will certainly be subject to refraction by bodies such as the moon and we explore if such an effect can result in an error in the apparent position of the sources and thereby give rise to the characteristic pattern of response associated with the eclipse anomaly. It is found there are phenomenological similarities, but only if gravitational waves are considered not merely to respond to spacetime curvature but are also significantly affected by the presence of mass, perhaps in a manner analogous to electromagnetic waves propagating through matter.

Alasdair Macleod

2006-10-23T23:59:59.000Z

187

Magnetic response to applied electrostatic field in external magnetic field  

E-Print Network (OSTI)

We show, within QED and other possible nonlinear theories, that a static charge localized in a finite domain of space becomes a magnetic dipole, if it is placed in an external (constant and homogeneous) magnetic field in the vacuum. The magnetic moment is quadratic in the charge, depends on its size and is parallel to the external field, provided the charge distribution is at least cylindrically symmetric. This magneto-electric effect is a nonlinear response of the magnetized vacuum to an applied electrostatic field. Referring to a simple example of a spherically-symmetric applied field, the nonlinearly induced current and its magnetic field are found explicitly throughout the space, the pattern of lines of force is depicted, both inside and outside the charge, which resembles that of a standard solenoid of classical magnetostatics.

T. C. Adorno; D. M. Gitman; A. E. Shabad

2013-11-16T23:59:59.000Z

188

Diagnosis of Extended Cold-Season Temperature Anomalies in Alaska  

Science Conference Proceedings (OSTI)

During the early winter of 2002 and late winter of 2007, the Alaskan sector of the North Pacific Ocean region experienced record-breaking temperature anomalies. The duration of these episodes was unusually long, with each lasting more than 1 ...

Martha Shulski; John Walsh; Eric Stevens; Richard Thoman

2010-02-01T23:59:59.000Z

189

Systematic construction of anomaly detection benchmarks from real data  

Science Conference Proceedings (OSTI)

Research in anomaly detection suffers from a lack of realistic and publicly-available problem sets. This paper discusses what properties such problem sets should possess. It then introduces a methodology for transforming existing classification data ...

Andrew F. Emmott, Shubhomoy Das, Thomas Dietterich, Alan Fern, Weng-Keen Wong

2013-08-01T23:59:59.000Z

190

3D Magnetotelluric Characterization Of The Geothermal Anomaly In The  

Open Energy Info (EERE)

Magnetotelluric Characterization Of The Geothermal Anomaly In The Magnetotelluric Characterization Of The Geothermal Anomaly In The Llucmajor Aquifer System (Majorca, Spain) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: 3D Magnetotelluric Characterization Of The Geothermal Anomaly In The Llucmajor Aquifer System (Majorca, Spain) Details Activities (0) Areas (0) Regions (0) Abstract: In the Llucmajor aquifer system (Majorca Island, Spain) some geothermal evidences have appeared. This phenomenon is not isolated to Majorca and it is present in other areas, where it can be associated with structural conditions, especially to the extensional event suffered by the island after the Alpine Orogeny. However, the origin of this anomaly in Llucmajor is not well known, and there is no surface geological evidence of

191

Barotropic Stationary States and Persistent Anomalies in the Atmosphere  

Science Conference Proceedings (OSTI)

A robust algorithm, capable of finding nearly stationary solutions of the unforced barotropic vorticity equation near to observed atmospheric streamfunctions, is presented. When applied to observed persistent anomaly patterns, the nearly ...

Jeffrey L. Anderson

1992-09-01T23:59:59.000Z

192

Spatiotemporal anomaly detection in gas monitoring sensor networks  

Science Conference Proceedings (OSTI)

In this paper, we use Bayesian Networks as a means for unsupervised learning and anomaly (event) detection in gas monitoring sensor networks for underground coal mines. We show that the Bayesian Network model can learn cyclical baselines for gas concentrations, ...

X. Rosalind Wang; Joseph T. Lizier; Oliver Obst; Mikhail Prokopenko; Peter Wang

2008-01-01T23:59:59.000Z

193

Filters and Approximate Confidence Intervals for Interpreting Rainfall Anomaly indices  

Science Conference Proceedings (OSTI)

The rainfall anomaly index (RAI) has been widely used to study variations over time in Sahelian rainfall. Its interpretation is often complicated by excessive missing data and changes in station network, both of which prevent a precise ...

L. Bärring; M. Hulme

1991-08-01T23:59:59.000Z

194

The Relationship of Highly Reflective Clouds to Tropical Climate Anomalies  

Science Conference Proceedings (OSTI)

The interannual variability of tropical convection related to the Southern Oscillation (SO) and regional climate anomalies is studied from satellite-derived estimates of highly reflective clouds (HRC) during 1971–87. The novel HRC data bank ...

Stefan Hastenrath

1990-03-01T23:59:59.000Z

195

The Opening of the Tasman Sea: A Gravity Anomaly Animation  

Science Conference Proceedings (OSTI)

The first plate tectonic gravity anomaly grid animation using data from the Tasman Sea is presented. In this animation the tectonic elements are represented by their respective gravity fields, based on recent marine-satellite-derived gravity ...

C. Gaina; R. D. Müller; W. R. Roest; P. Symonds

1998-01-01T23:59:59.000Z

196

Resampling approach for anomaly detection in multispectral images  

Science Conference Proceedings (OSTI)

We propose a novel approach for identifying the 'most unusual' samples in a data set, based on a resampling of data attributes. The resampling produces a 'background class' and then binary classification is used to distinguish the original training set from the background. Those in the training set that are most like the background (i e, most unlike the rest of the training set) are considered anomalous. Although by their nature, anomalies do not permit a positive definition (if I knew what they were, I wouldn't call them anomalies), one can make 'negative definitions' (I can say what does not qualify as an interesting anomaly). By choosing different resampling schemes, one can identify different kinds of anomalies. For multispectral images, anomalous pixels correspond to locations on the ground with unusual spectral signatures or, depending on how feature sets are constructed, unusual spatial textures.

Theiler, J. P. (James P.); Cai, D. (David)

2003-01-01T23:59:59.000Z

197

Global Annual Temperature Anomalies from Land and Ocean Observations...  

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

Temperature Anomalies from Land and Ocean Observations, 1880-2012 image data Data Graphics Graphics Reference Hansen, J.E., R. Ruedy, M. Sato, and K. Lo. 2013. NASA GISS...

198

Predictability of Java Monsoon Rainfall Anomalies: A Case Study  

Science Conference Proceedings (OSTI)

A substantial portion of the interannual variability of rainfall at Jakarta, Java, can be predicted from antecedent pressure anomalies at Darwin, northern Australia; the pressure persistence, the concurrent correlation of pressure and rainfall, ...

Stefan Hastenrath

1987-01-01T23:59:59.000Z

199

Mechanisms Determining the Atmospheric Response to Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

A simple model is used to study the mechanisms which control the local and remote (teleconnection) response of the atmosphere to the thermal forcing resulting from sea surface temperature (SST) anomalies located at various latitudes. The model ...

Peter J. Webster

1981-03-01T23:59:59.000Z

200

Large Amplitude Flow Anomalies in Northern Hemisphere Midlatitudes  

Science Conference Proceedings (OSTI)

The composite of large amplitude flow anomalies identified from extremely large amplitudes of the planetary-scale waves is examined in terms of the temporal and spatial evolution of both the large-scale flow and the storm tracks. The ...

Anthony R. Hansen; Alfonso Sutera

1995-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Simulations of Persistent North Pacific Circulation Anomalies and Interhemispheric Teleconnections  

Science Conference Proceedings (OSTI)

Evidence is presented from a composite analysis of a 14-year general circulation model simulation, that persistent North Pacific (PNP) circulation anomalies during boreal winter are part of a larger-scale meridional development extending into the ...

R. W. Higgins; S. D. Schubert

1996-01-01T23:59:59.000Z

202

The Annual Peak in the SST Anomaly Spectrum  

Science Conference Proceedings (OSTI)

The manner in which monthly mean sea surface temperature anomalies (SSTAs) show enhanced variance at the annual period in the extratropics (an annual peak in the variance spectrum) is illustrated by observations and model simulations. A mechanism,...

Jens Möller; Dietmar Dommenget; Vladimir A. Semenov

2008-06-01T23:59:59.000Z

203

Climatology of Tropical Intraseasonal Convective Anomalies: 1979–2002  

Science Conference Proceedings (OSTI)

Tropical intraseasonal convective anomalies (TICA) have a central role in subseasonal changes in the coupled ocean–atmosphere system, but the climatology of TICA events has not been properly documented. This study exploits 24 years of outgoing ...

Charles Jones; Leila M. V. Carvalho; R. Wayne Higgins; Duane E. Waliser; J-K. E. Schemm

2004-02-01T23:59:59.000Z

204

Circulation Anomalies Associated with Tropical Convection during Northern Winter  

Science Conference Proceedings (OSTI)

Lagged cross correlations between outgoing longwave radiation (OLR) and National Meteorological Center global analyses are utilized to isolate the preferred upper-level and surface circulation anomalies associated with tropical convection during ...

George N. Kiladis; Klaus M. Weickmann

1992-09-01T23:59:59.000Z

205

Search for millicharged particles in reactor neutrino experiments: a probe of the PVLAS anomaly  

E-Print Network (OSTI)

It has been recently suggested that the vacuum magnetic dichroism observed by the PVLAS experiment could be explained by the pair production of a new light, m ~0.1 eV, millicharged, q ~ 3 10^{-6} e, fermions. In addition, it has been pointed out that millicharged particles with q > 10^{-9} e appear naturally in models based on the string theory. We show that low energy reactor neutrino experiments provide a sensitive probe of millicharged particles. Considering, as an example, recent results of the TEXONO experiment searching for neutrino magnetic moment, a new upper bound q < 10^{-5} e for the mass region m < 1 keV is derived. These results enhance motivations for a more sensitive search for such particles in near future experiments. Furthemore, a direct experimental limit on the electric charge of the electron antineutrino q < 3.7 10^{-12} e is obtained.

S. N. Gninenko; N. V. Krasnikov; A. Rubbia

2006-12-17T23:59:59.000Z

206

Search for millicharged particles in reactor neutrino experiments: a probe of the PVLAS anomaly  

E-Print Network (OSTI)

It has been recently suggested that the vacuum magnetic dichroism observed by the PVLAS experiment could be explained by the pair production of a new light, m ~0.1 eV, millicharged, q ~ 3 10^{-6} e, fermions. In addition, it has been pointed out that millicharged particles with q > 10^{-9} e appear naturally in models based on the string theory. We show that low energy reactor neutrino experiments provide a sensitive probe of millicharged particles. Considering, as an example, recent results of the TEXONO experiment searching for neutrino magnetic moment, a new upper bound q < 10^{-5} e for the mass region m < 1 keV is derived. These results enhance motivations for a more sensitive search for such particles in near future experiments. Furthemore, a direct experimental limit on the electric charge of the electron antineutrino q < 3.7 10^{-12} e is obtained.

Gninenko, S N; Rubbia, André

2006-01-01T23:59:59.000Z

207

Evidence of a barrier oxidation dependence on the interfacialmagnetism in co/alumina based magnetic tunnel junctions  

SciTech Connect

Soft x-ray absorption spectroscopy and magnetic circular dichroism at the Co L{sub 2,3} edge have been applied to explore the near-interfacial magnetism of Co electrodes in Co/alumina based magnetic tunnel junctions. By taking into account the formation of CoO at the FM/barrier interface, the change in the total magnetic moment on metallic Co atoms as a function of barrier oxidation has been determined. The results demonstrate a strong correlation between the Co moments and measured TMR values, and an enhancement in the Co moments for moderate oxidation times.

Telling, N.D.; van der Laan, G.; Ladak, S.; Hicken, R.J.; Arenholz, E.

2005-09-29T23:59:59.000Z

208

Fluid/Gravity Correspondence, Second Order Transport and Gravitational Anomaly  

E-Print Network (OSTI)

We study the transport properties of a relativistic fluid affected by chiral and gauge-gravitational anomalies. The computation is performed in the framework of the fluid/gravity correspondence for a 5 dim holographic model with Chern-Simons terms in the action. We find new anomalous and non anomalous transport coefficients, as well as new contributions to the existing ones coming from the mixed gauge-gravitational anomaly. Consequences for the shear waves dispersion relation are analyzed.

Eugenio Megias; Francisco Pena-Benitez

2013-07-29T23:59:59.000Z

209

CARS Control Anomaly Recognition System: System Concept, Requirements, and Specifications  

Science Conference Proceedings (OSTI)

This report presents results of an initial study aimed at defining the system concept, principal requirements, and functional specification for a control anomaly recognition system (CARS) software tool. The purpose of the CARS software system is to assist nuclear power plant operators in the early detection of faults and anomalies in plant control systems before they cause reactor scrams or component damage. The diagnostic capability technology of CARS can support other process industries' applications b...

2002-04-12T23:59:59.000Z

210

Quantized magnetic flux through the orbits of hydrogen-like atoms within the atomic model of Sommerfeld  

E-Print Network (OSTI)

Within the Sommerfeld atomic model the quantization of magnetic flux through the electronic orbits is investigated together with its dependency on additional sources of magnetic fields. These sources alter the magnetic flux through the atomic orbits and in consequence are causing energy shifts. This effect is investigated for the cases, where the source is an external magnetic field, the magnetic moment of the nucleus or the magnetic moment of the electron. The energy shifts due to external magnetic fields, the magnetic dipole contribution of the hyperfine splitting and the spin-orbit coupling can be reproduced very well. The meaning of 'spin', however, changes within this approach drastically. The unusual Land\\'e g-factor of 2 for the electron is a result of the orbital motion and the magnetic moment of the electron rather than it is an intrinsic property of the electron.

W. -D. R. Stein

2013-02-25T23:59:59.000Z

211

Some Aspects of Rotational and Magnetic Energies for a Hierarchy of Celestial Objects  

E-Print Network (OSTI)

Celestial objects, from earth like planets to clusters of galaxies, possess angular momentum and magnetic fields. Here we compare the rotational and magnetic energies of a whole range of these celestial objects together with their gravitational self energies and find a number of interesting relationships. The celestial objects, due to their magnetic fields, also posses magnetic moments. The ratio of magnetic moments of these objects with the nuclear magnetic moments also exhibits interesting trends. We also compare their gyromagnetic ratio which appears to fall in a very narrow range for the entire hierarchy of objects. Here we try to understand the physical aspects implied by these observations and the origin of these properties in such a wide range of celestial objects, spanning some twenty orders in mass, magnetic field and other parameters.

Sivaram, C

2010-01-01T23:59:59.000Z

212

Microearthquake moment tensors from the Coso Geothermal area | Open Energy  

Open Energy Info (EERE)

Microearthquake moment tensors from the Coso Geothermal area Microearthquake moment tensors from the Coso Geothermal area Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Microearthquake moment tensors from the Coso Geothermal area Details Activities (1) Areas (1) Regions (0) Abstract: The Coso geothermal area, California, has produced hot water and steam for electricity generation for more than 20 years, during which time there has been a substantial amount of microearthquake activity in the area. Seismicity is monitored by a high-quality permanent network of 16 three-component digital borehole seismometers operated by the US Navy and supplemented by a ~ 14-station portable array of surface three-component digital instruments. The portable stations improve focal sphere coverage, providing seismic-wave polarity and amplitude data sets sufficient for

213

Classifying North Atlantic Tropical Cyclone Tracks by Mass Moments*  

E-Print Network (OSTI)

A new method for classifying tropical cyclones or similar features is introduced. The cyclone track is considered as an open spatial curve, with the wind speed or power information along the curve considered to be a mass attribute. The first and second moments of the resulting object are computed and then used to classify the historical tracks using standard clustering algorithms. Mass moments allow the whole track shape, length, and location to be incorporated into the clustering methodology. Tropical cyclones in the North Atlantic basin are clustered with K-means by mass moments, producing an optimum of six clusters with differing genesis locations, track shapes, intensities, life spans, landfalls, seasonal patterns, and trends. Even variables that are not directly clustered show distinct separation between clusters. A trend analysis confirms recent conclusions of increasing tropical cyclones in the basin over the past two decades. However, the trends vary across clusters. 1.

Yochanan Kushnir; Suzana; J. Camargo

2008-01-01T23:59:59.000Z

214

Measuring moment of inertia based on identification of nonlinear system featuring naught excitation  

Science Conference Proceedings (OSTI)

For large ammunitions and spacecrafts, friction moment and air resistance are major error resources in measuring moment of inertia (MOI). The paper proposes a novel measurement method based on compound pendulum, in which the whole measurement is considered ... Keywords: Naught excitation, air resistance, compound pendulum, friction moment, moment of inertia, nonlinear system, system identification

Wen Hou

2006-04-01T23:59:59.000Z

215

Photon Redshift in a Magnetic field  

E-Print Network (OSTI)

Previous results from the authors concerning the arising a tiny photon anomalous paramagnetic moment are also interpreted as a red-shift in analogy to the gravitational known effect. It is due to the photon interaction with the magnetized virtual electron-positron background which withdraw transverse momentum from photons and is polarization-dependent. If the photon frequency red-shift implies a change in time, a clock would go faster for increasing magnetic field intensity.

Rojas, H Pérez

2010-01-01T23:59:59.000Z

216

Large Magnetization at Carbon Surfaces  

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

Large Magnetization at Carbon Large Magnetization at Carbon Surfaces Large Magnetization at Carbon Surfaces Print Wednesday, 31 August 2011 00:00 From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

217

Second moment method for a family of boolean CSP  

E-Print Network (OSTI)

The estimation of phase transitions in random boolean Constraint Satisfaction Problems (CSP) is based on two fundamental tools: the first and second moment methods. While the first moment method on the number of solutions permits to compute upper bounds on any boolean CSP, the second moment method used for computing lower bounds proves to be more tricky and in most cases gives only the trivial lower bound 0. In this paper, we define a subclass of boolean CSP covering the monotone versions of many known NP-Complete boolean CSPs. We give a method for computing non trivial lower bounds for any member of this subclass. This is achieved thanks to an application of the second moment method to some selected solutions called characteristic solutions that depend on the boolean CSP considered. We apply, as an example, this method to establish that the threshold r_{k} of monotone 1-in-k-SAT is \\log k/k\\leq r_{k}\\leq\\log^{2}k/k

Boufkhad, Yacine

2011-01-01T23:59:59.000Z

218

An automatic method for generating affine moment invariants  

Science Conference Proceedings (OSTI)

Affine moment invariants are important if one wants to recognize the surface of a plane in three dimensions when the orientation of the plane is not known beforehand and only two-dimensional information is available. The notion of generating function ... Keywords: Affine invariant, Affine transformation, Generating invariants, Pattern recognition

Jin Liu; Deren Li; Wenbing Tao; Li Yan

2007-12-01T23:59:59.000Z

219

Moment free energies for polydisperse systems Peter Sollich \\Lambda  

E-Print Network (OSTI)

Moment free energies for polydisperse systems Peter Sollich \\Lambda Department of Mathematics, King(oe). The free energy depends on all details of ae(oe), making the analysis of phase equilibria in such systems intractable. However, in many (especially mean­field) models the excess free energy only depends on a finite

Sollich, Peter

220

Pion-nucleon bremsstrahlung and. delta. electromagnetic moments  

SciTech Connect

A dynamically consistent, gauge invariant model for ..pi..N bremsstrahlung is developed. The ..pi..N dynamics are described through an isobar model fit to the experimental phase shifts. The charge and current operators are constructed in a gauge invariant fashion and include contributions from interaction currents at the ..pi..N..delta.. vertices and from the bare ..delta.. electromagnetic moments. The meaning of such moments for an unstable particle is discussed in detail. From a fit to the ..pi../sup +/p bremsstrahlung data, we extract a dipole moment for the bare ..delta../sup ++/ in the range ..mu../sub ..delta..//sub =//..mu../sub p/approx. =2.5 to 3.5; if the contributions from internal pion and nucleon currents are included, this ratio is somewhat smaller. The ..pi../sup -/p bremsstrahlung data are consistent with a broad range of values for ..mu../sub ..delta..//sub =/, including ..mu../sub ..delta..//sub =/ = 0. The ..delta.. quadrupole moment cannot be extracted meaningfully from the data. We discuss the sensitivity of the extracted values of ..mu../sub ..delta../ to the off-shell extension of the ..pi..N scattering amplitude. The polarization asymmetry is found to be sensitive to ..mu../sub ..delta../ while being less sensitive to off-shell scattering.

Heller, L.; Kumano, S.; Martinez, J.C.; Moniz, E.J.

1987-02-01T23:59:59.000Z

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


221

Capturing 'in the moment' creativity through data triangulation  

Science Conference Proceedings (OSTI)

We present a first attempt at capturing 'in the moment' creativity (ITMC) through a triangulation self-report techniques, external judges, and physiological measures. In our study, participants were asked to sketch for 30 minutes while wearing GSR and ... Keywords: creativity, eeg, gsr, physiology, self-report

Erin A. Carroll; Celine Latulipe

2011-11-01T23:59:59.000Z

222

Degenerate flag varieties: moment graphs and Schröder numbers  

Science Conference Proceedings (OSTI)

We study geometric and combinatorial properties of the degenerate flag varieties of type A. These varieties are acted upon by the automorphism group of a certain representation of a type A quiver, containing a maximal torus T. Using the group ... Keywords: Flag varieties, Moment graphs, Quiver Grassmannians, Schröder numbers

Giovanni Cerulli Irelli; Evgeny Feigin; Markus Reineke

2013-08-01T23:59:59.000Z

223

Dipole Moment Bounds on Scalar Dark Matter Annihilation  

E-Print Network (OSTI)

We consider a scalar dark matter annihilations to light leptons mediated by charged exotic fermions. The interaction of this model also adds a correction to dipole moments of light leptons. In the simplified model, these processes will depend upon the same coupling constants. The tight experimental bounds on the dipole moments of light leptons will constrain the coupling constants. Consequently, this bound will then limit the annihilations. We will produce this dipole moment bounds on the annihilation. From this analysis, we report that the bound on annihilation to the electrons is $4.0\\times10^{-7}\\pb$ (g-2) + $8.8\\times 10^{-15}\\pb$ (EDM) and the muons is $5.6\\times 10^{-4}\\pb$ (g-2) + $180\\pb$ (EDM), in the limit where the mediator is much heavier than dark matter. The parentheses indicate the dipole moment used to obtain the values. We note that only the annihilation to muons through a CP-violating (EDM) coupling is not excluded from indirect detection experiments.

Keita Fukushima

2013-10-07T23:59:59.000Z

224

Effective equations for the quantum pendulum from momentous quantum mechanics  

SciTech Connect

In this work we study the quantum pendulum within the framework of momentous quantum mechanics. This description replaces the Schroedinger equation for the quantum evolution of the system with an infinite set of classical equations for expectation values of configuration variables, and quantum dispersions. We solve numerically the effective equations up to the second order, and describe its evolution.

Hernandez, Hector H.; Chacon-Acosta, Guillermo [Universidad Autonoma de Chihuahua, Facultad de Ingenieria, Nuevo Campus Universitario, Chihuahua 31125 (Mexico); Departamento de Matematicas Aplicadas y Sistemas, Universidad Autonoma Metropolitana-Cuajimalpa, Artificios 40, Mexico D. F. 01120 (Mexico)

2012-08-24T23:59:59.000Z

225

Numerical calculation of the moments of the population balance equation  

Science Conference Proceedings (OSTI)

The combined CFD-PBM (population balance models) are computationally intensive, so a possibility is to calculate only a few moments of the probability density function (PDF) of the PBM minimizing the computational costs. However, this formulation results ... Keywords: least squares method, population balance equation, quadrature approximation

C. A. Dorao; H. A. Jakobsen

2006-11-01T23:59:59.000Z

226

Automatic Construction of Anomaly Detectors from Graphical Models  

Science Conference Proceedings (OSTI)

Detection of rare or previously unseen attacks in cyber security presents a central challenge: how does one search for a sufficiently wide variety of types of anomalies and yet allow the process to scale to increasingly complex data? In particular, creating each anomaly detector manually and training each one separately presents untenable strains on both human and computer resources. In this paper we propose a systematic method for constructing a potentially very large number of complementary anomaly detectors from a single probabilistic model of the data. Only one model needs to be trained, but numerous detectors can then be implemented. This approach promises to scale better than manual methods to the complex heterogeneity of real-life data. As an example, we develop a Latent Dirichlet Allocation probability model of TCP connections entering Oak Ridge National Laboratory. We show that several detectors can be automatically constructed from the model and will provide anomaly detection at flow, sub-flow, and host (both server and client) levels. This demonstrates how the fundamental connection between anomaly detection and probabilistic modeling can be exploited to develop more robust operational solutions.

Ferragut, Erik M [ORNL; Darmon, David M [ORNL; Shue, Craig A [ORNL; Kelley, Stephen [ORNL

2011-01-01T23:59:59.000Z

227

Identifying Isotropic Events Using a Regional Moment Tensor Inversion  

SciTech Connect

We calculate the deviatoric and isotropic source components for 17 explosions at the Nevada Test Site, as well as 12 earthquakes and 3 collapses in the surrounding region of the western US, using a regional time-domain full waveform inversion for the complete moment tensor. The events separate into specific populations according to their deviation from a pure double-couple and ratio of isotropic to deviatoric energy. The separation allows for anomalous event identification and discrimination between explosions, earthquakes, and collapses. Confidence regions of the model parameters are estimated from the data misfit by assuming normally distributed parameter values. We investigate the sensitivity of the resolved parameters of an explosion to imperfect Earth models, inaccurate event depths, and data with low signal-to-noise ratio (SNR) assuming a reasonable azimuthal distribution of stations. In the band of interest (0.02-0.10 Hz) the source-type calculated from complete moment tensor inversion is insensitive to velocity models perturbations that cause less than a half-cycle shift (<5 sec) in arrival time error if shifting of the waveforms is allowed. The explosion source-type is insensitive to an incorrect depth assumption (for a true depth of 1 km), and the goodness-of-fit of the inversion result cannot be used to resolve the true depth of the explosion. Noise degrades the explosive character of the result, and a good fit and accurate result are obtained when the signal-to-noise ratio (SNR) is greater than 5. We assess the depth and frequency dependence upon the resolved explosive moment. As the depth decreases from 1 km to 200 m, the isotropic moment is no longer accurately resolved and is in error between 50-200%. However, even at the most shallow depth the resultant moment tensor is dominated by the explosive component when the data have a good SNR.

Ford, S R; Dreger, D S; Walter, W R

2008-11-04T23:59:59.000Z

228

How to Turn Carbon into A Magnet? X-rays and Protons Give the...  

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

of the sample using computer software. figure 2 Figure 2: A carbon film is hit by a high-energy proton beam, causing the magnetic moments of the atoms to align around the beam...

229

A New Geothermal Anomaly In Nicaragua | Open Energy Information  

Open Energy Info (EERE)

A New Geothermal Anomaly In Nicaragua A New Geothermal Anomaly In Nicaragua Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A New Geothermal Anomaly In Nicaragua Details Activities (0) Areas (0) Regions (0) Abstract: The information acquired during reconnaissance surface exploration in Nicaragua suggests a large geothermal reservoir in the region of Masaya-Nandaime. The exploration programme included geological, geophysical, geochemical, as well as hydrogeological investigations. Integration of the results from various disciplines permitted postulation of a conceptual model of the reservoir and of the thermal regime within the zone immediately above and around the reservoir. The reservoir with a temperature in excess of 200°C is emplaced at a depth between 2 and 4 km

230

Hg Anomalies In Soils- A Geochemical Exploration Method For Geothermal  

Open Energy Info (EERE)

Hg Anomalies In Soils- A Geochemical Exploration Method For Geothermal Hg Anomalies In Soils- A Geochemical Exploration Method For Geothermal Areas Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Hg Anomalies In Soils- A Geochemical Exploration Method For Geothermal Areas Details Activities (5) Areas (5) Regions (0) Abstract: Hg contents of soils in geothermal areas in the western U.S. were measured and a three-fold distribution was observed: peak, aureole and background. Peak values (up to several 100 ppm Hg) occur in fumaroles of vapour-dominated systems, around hot springs, and in zones overlying steeply dipping, hot-water aquifers. Aureoic values (up to several 100 ppb Hg) are found in zones surrounding the peak areas and delineate areas with shallow geothermal convection. Background values vary between 7 and 40 ppb

231

Anomaly-free constraints in neutrino seesaw models  

E-Print Network (OSTI)

The implementation of seesaw mechanisms to give mass to neutrinos in the presence of an anomaly-free U(1)_X gauge symmetry is discussed in the context of minimal extensions of the standard model. It is shown that type-I and type-III seesaw mechanisms cannot be simultaneously implemented with an anomaly-free local U(1)_X, unless the symmetry is a replica of the well-known hypercharge. For combined type-I/II or type-III/II seesaw models it is always possible to find nontrivial anomaly-free charge assignments, which are however tightly constrained, if the new neutral gauge boson is kinematically accessible at LHC. The discovery of the latter and the measurement of its decays into third-generation quarks, as well as its mixing with the standard Z boson, would allow one to discriminate among different seesaw realizations.

D. Emmanuel-Costa; Edison T. Franco; R. Gonzalez Felipe

2009-02-10T23:59:59.000Z

232

Anomaly-free constraints in neutrino seesaw models  

SciTech Connect

The implementation of seesaw mechanisms to give mass to neutrinos in the presence of an anomaly-free U(1){sub X} gauge symmetry is discussed in the context of minimal extensions of the standard model. It is shown that type-I and type-III seesaw mechanisms cannot be simultaneously implemented with an anomaly-free local U(1){sub X}, unless the symmetry is a replica of the well-known hypercharge. For combined type-I/II or type-III/II seesaw models it is always possible to find nontrivial anomaly-free charge assignments, which are however tightly constrained, if the new neutral gauge boson is kinematically accessible at LHC. The discovery of the latter and the measurement of its decays into third-generation quarks, as well as its mixing with the standard Z boson, would allow one to discriminate among different seesaw realizations.

Emmanuel-Costa, D. [Departamento de Fisica and Centro de Fisica Teorica de Particulas (CFTP), Instituto Superior Tecnico, Avenida Rovisco Pais, 1049-001 Lisboa (Portugal); Franco, Edison T. [Instituto de Fisica Teorica, Universidade Estadual Paulista, Rua Doutor Bento Teobaldo Ferraz 271 - Bloco II, 01140-070 - Sao Paulo, SP (Brazil); Departamento de Fisica and Centro de Fisica Teorica de Particulas (CFTP), Instituto Superior Tecnico, Avenida Rovisco Pais, 1049-001 Lisboa (Portugal); Felipe, R. Gonzalez [Area Cientifica de Fisica, Instituto Superior de Engenharia de Lisboa, Rua Conselheiro Emidio Navarro 1, 1959-007 Lisboa (Portugal); Departamento de Fisica and Centro de Fisica Teorica de Particulas (CFTP), Instituto Superior Tecnico, Avenida Rovisco Pais, 1049-001 Lisboa (Portugal)

2009-06-01T23:59:59.000Z

233

Fast switching NMR system for measurements of ground-state quadrupole moments of short-lived nuclei  

E-Print Network (OSTI)

A beta-ray detecting nuclear quadrupole resonance system has been developed at NSCL/MSU to measure ground-state electric quadrupole moments of short-lived nuclei produced as fast rare isotope beams. This system enables quick and sequential application of multiple transition frequencies over a wide range. Fast switching between variable capacitors in resonance circuits ensures sufficient power delivery to the coil in the beta-ray detecting nuclear magnetic resonance technique. The fast switching technique enhances detection efficiency of resonance signals and is especially useful when the polarization and/or production rate of the nucleus of interest are small and when the nuclear spin is large.

K. Minamisono; R. R. Weerasiri; H. L. Crawford; P. F. Mantica; K. Matsuta; T. Minamisono; J. S. Pinter; J. B. Stoker

2008-02-08T23:59:59.000Z

234

Spin microscope based on optically detected magnetic resonance  

DOE Patents (OSTI)

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2010-07-13T23:59:59.000Z

235

Spin microscope based on optically detected magnetic resonance  

Science Conference Proceedings (OSTI)

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2009-10-27T23:59:59.000Z

236

Spin microscope based on optically detected magnetic resonance  

SciTech Connect

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2010-06-29T23:59:59.000Z

237

Spin microscope based on optically detected magnetic resonance  

DOE Patents (OSTI)

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of impaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2009-11-10T23:59:59.000Z

238

Spin microscope based on optically detected magnetic resonance  

SciTech Connect

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2007-12-11T23:59:59.000Z

239

Large Magnetization at Carbon Surfaces  

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

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

240

Large Magnetization at Carbon Surfaces  

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

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

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


241

Large Magnetization at Carbon Surfaces  

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

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

242

Large Magnetization at Carbon Surfaces  

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

Large Magnetization at Carbon Surfaces Print Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure carbon to be magnetic, but for more than ten years scientists have suspected that carbon can be made to be magnetic by doping it with nonmagnetic materials, changing its order ever so slightly. Years ago, the first x-ray images obtained using the scanning transmission x-ray microscope at ALS Beamline 11.0.2 provided valuable insight into how proton irradiation can cause carbon to transform into a ferromagnetic material. Now, researchers are using x-ray spectroscopy at ALS Beamline 4.0.2 to study the magnetism of proton-irradiated graphite surfaces in order to understand the effects of hydrogen (i.e. protons) on the electronic structure of carbon. In studying the properties of electrons responsible for magnetic order in graphite, researchers found that a very large magnetic moment is essentially switched on when hydrogen atoms are incorporated at the surface of graphite.

243

Low-temperature magnetization of (Ga,Mn) As semiconductors  

E-Print Network (OSTI)

We report on a comprehensive study of the ferromagnetic moment per Mn atom in (Ga,Mn)As ferromagnetic semiconductors. Theoretical discussion is based on microscopic calculations and on an effective model of Mn local moments antiferromagnetically coupled to valence band hole spins. The validity of the effective model over the range of doping studied is assessed by comparing with microscopic tight-binding/coherent-potential approximation calculations. Using the virtual crystal k center dot p model for hole states, we evaluate the zero-temperature mean-field contributions to the magnetization from the hole kinetic and exchange energies, and magnetization suppression due to quantum fluctuations of Mn moment orientations around their mean-field ground state values. Experimental low-temperature ferromagnetic moments per Mn are obtained by superconducting quantum interference device and x-ray magnetic circular dichroism measurements in a series of (Ga,Mn)As semiconductors with nominal Mn doping ranging from similar to 2 to 8%. Hall measurements in as-grown and annealed samples are used to estimate the number of uncompensated substitutional Mn moments. Based on our comparison between experiment and theory we conclude that all these Mn moments in high quality (Ga,Mn)As materials have nearly parallel ground state alignment.

Jungwirth, T.; Masek, J.; Wang, KY; Edmonds, KW; Sawicki, M.; Polini, M.; Sinova, Jairo; MacDonald, AH; Campion, RP; Zhao, LX; Farley, NRS; Johal, TK; van der Laan, G.; Foxon, CT; Gallagher, BL.

2006-01-01T23:59:59.000Z

244

Simple correlations between electric quadrupole moments of atomic nuclei  

SciTech Connect

Measurements of non-yrast electric quadrupole moments (i.e., diagonal E2 matrix elements) of atomic nuclei are becoming widely available from multiple-step Coulomb excitation. It is shown that, where quadrupole-moment data exist, $\\langle 2_1^+ ||E2|| 2_1^+ \\rangle+\\langle 2_2^+ ||E2|| 2_2^+ \\rangle\\approx 0$ is observed across a wide range of masses and deformations. In addition, $\\langle 4_1^+ ||E2|| 4_1^+ \\rangle+\\langle 4_2^+ ||E2|| 4_2^+ \\rangle+\\langle 4_3^+ ||E2|| 4_3^+ \\rangle\\approx 0$ is observed within two standard deviations for three of the four existing measurements. Rotor models appear to be sufficient in describing these trends.

Allmond, James M [ORNL] [ORNL

2013-01-01T23:59:59.000Z

245

End effects on elbows subjected to moment loadings  

SciTech Connect

So-called ''end effects'' for moment loadings on short-radius and long-radius butt welding elbows of various arc lengths are investigated with a view toward providing more accurate design formulas for critical piping systems. Data developed in this study, along with published information, were used to develop relatively simple design equations for elbows attached at both ends to long sections of straight pipe. These formulas are the basis for an alternate ASME Code procedure for evaluating the bending moment stresses in Class 1 nuclear piping (ASME Code Case N-319). The more complicated problems of elbows with other end conditions, e.g., flanges at one or both ends, are also considered. Comparisons of recently published experimental and theoretical studies with current industrial code design rules for these situations indicate that these rules also need to be improved.

Rodabaugh, E.C.

1982-01-01T23:59:59.000Z

246

End effects on elbows subjected to moment loadings. [PWR; BWR  

SciTech Connect

So-called end effects for moment loadings on short-radius and long-radius butt welding elbows of various arc lengths are investigated with a view toward providing more accurate design formulas for critical piping systems. Data developed in this study, along with published information, were used to develop relatively simple design equations for elbows attached at both ends to long sections of straight pipe. These formulas are the basis for an alternate ASME Code procedure for evaluating the bending moment stresses in Class 1 nuclear piping (ASME Code Case N-319). The more complicated problems of elbows with other end conditions, e.g., flanges at one or both ends, are also considered. Comparisons of recently published experimental and theoretical studies with current industrial code design rules for these situations indicate that these rules also need to be improved.

Rodabaugh, E.C.; Moore, S.E.

1982-01-01T23:59:59.000Z

247

Higher moments of net-proton multiplicity distributions  

Science Conference Proceedings (OSTI)

Higher moments of event-by-event net-proton multiplicity distributions have been applied to search for the QCD critical point. Model results are used to provide a baseline for this search. The measured moment products, {kappa}{sigma}{sup 2} and S{sigma} of net-proton distributions, which are directly connected to the thermodynamical baryon number susceptibility ratio in Lattice QCD and Hadron Resonance Gas (HRG) model, are compared to the transport and thermal model results. We argue that a non-monotonic dependence of {kappa}{sigma}{sup 2} and S{sigma} as a function of beam energy can be used to search for the QCD critical point.

Luo Xiaofeng, E-mail: xfluo@lbl.gov [Central China Normal University, Institute of Particle Physics (China); Mohanty, Bedangadas [Variable Energy Cyclotron Center (India); Ritter, Hans Georg; Xu Nu [Lawrence Berkeley National Laboratory (United States)

2012-06-15T23:59:59.000Z

248

Magnetic monopoles and dipoles in quantum mechanics  

Science Conference Proceedings (OSTI)

The force on and the energy of a ''di-monopole'', which is the limiting case of a dipole made from two monopoles at zero separation and finite magnetic moment, interacting with an externally fixed magnetic field resulting from an electric current, is considered. A model involving only a monopole is used to illustrate the physical principles involved when magnetic sources move in a solenoidal field whose source is an electric current. The problems encountered in Hamiltonian theory are discussed. 5 refs., 3 figs. (LEW)

Lipkin, H.J.; Peshkin, M.

1986-01-01T23:59:59.000Z

249

Proceedings of the Axial Offset Anomaly (AOA) Science Workshop  

Science Conference Proceedings (OSTI)

This report presents proceedings of the Axial Offset Anomaly (AOA) Science Workshop, held February 10-11 in Palo Alto, California. Twenty-two papers were presented on various aspects of AOA by utilities, EPRI Robust Fuel Program contractors, staff from EPRI and universities, international researchers, and equipment vendors.

2000-06-27T23:59:59.000Z

250

A Pattern-Based Framework for Software Anomaly Detection  

Science Conference Proceedings (OSTI)

This paper presents a pattern-based framework for developing tool support to detect software anomalies. The use of a pattern-based approach is important because it provides the flexibility needed to address domain-specific needs, with respect to the ... Keywords: high assurance software, pattern specification language, safety-critical avionics systems, software inspection, software tools framework

S. C. Kothari; Luke Bishop; Jeremias Sauceda; Gary Daugherty

2004-06-01T23:59:59.000Z

251

BGP-lens: patterns and anomalies in internet routing updates  

Science Conference Proceedings (OSTI)

The Border Gateway Protocol (BGP) is one of the fundamental computer communication protocols. Monitoring and mining BGP update messages can directly reveal the health and stability of Internet routing. Here we make two contributions: firstly we ... Keywords: BGP monitoring, anomalies, patterns, self-similarity

B. Aditya Prakash; Nicholas Valler; David Andersen; Michalis Faloutsos; Christos Faloutsos

2009-06-01T23:59:59.000Z

252

Network anomaly detection with the restricted Boltzmann machine  

Science Conference Proceedings (OSTI)

With the rapid growth and the increasing complexity of network infrastructures and the evolution of attacks, identifying and preventing network abuses is getting more and more strategic to ensure an adequate degree of protection from both external and ... Keywords: Anomaly detection, Energy-based models, Intrusion detection, Restricted Boltzmann machine, Semi-supervised learning

Ugo Fiore, Francesco Palmieri, Aniello Castiglione, Alfredo De Santis

2013-12-01T23:59:59.000Z

253

Spatial neighborhood based anomaly detection in sensor datasets  

Science Conference Proceedings (OSTI)

Success of anomaly detection, similar to other spatial data mining techniques, relies on neighborhood definition. In this paper, we argue that the anomalous behavior of spatial objects in a neighborhood can be truly captured when both (a) spatial ... Keywords: Outlier detection, Sensors, Spatial neighborhood

Vandana P. Janeja; Nabil R. Adam; Vijayalakshmi Atluri; Jaideep Vaidya

2010-03-01T23:59:59.000Z

254

Modular Anomaly Detection for Smartphone Ad hoc Communication  

E-Print Network (OSTI)

a mobile ad hoc network (MANET). While intrusion detection in MANETs is typically evaluated with network. The study shows the feasibility of the statistics-based anomaly detection regime, having low CPU usage, among others, has been focused on studies of energy and bandwidth constrained communication using

255

An ERP study of semantic anomalies in second language processing  

Science Conference Proceedings (OSTI)

This study conducts an event-related potential (ERP) study to investigate the temporal neural dynamics of semantic processing in bilinguals. The experiment was done with Korean speakers of English as an L2, divided into two groups depending on their ... Keywords: N400, second language, semantic anomaly, semantic congruency, sentence processing

Jia Miao

2013-06-01T23:59:59.000Z

256

Residual bouguer gravity anomaly map of northern New Mexico  

DOE Green Energy (OSTI)

The map is computer contoured from equidistant grid and bicubic spline interpolated surface. Bouguer gravity anomaly correction applied is g/sub BC/ = (0.034) x (elevation - regional elevation), with density 2.67 g/cc. Overall dimensions are 41/sup 1///sub 2/'' x 43''; scale is 1 : 500,000. (JGB)

Aiken, C.L.V.; Laughlin, A.W.; West, F.G.

1977-03-01T23:59:59.000Z

257

Reducing false positives in anomaly detectors through fuzzy alert aggregation  

Science Conference Proceedings (OSTI)

In this paper we focus on the aggregation of IDS alerts, an important component of the alert fusion process. We exploit fuzzy measures and fuzzy sets to design simple and robust alert aggregation algorithms. Exploiting fuzzy sets, we are able to robustly ... Keywords: Aggregation, Anomaly detection, Fuzzy measures, Fuzzy sets, Intrusion detection, Multisensor fusion

Federico Maggi; Matteo Matteucci; Stefano Zanero

2009-10-01T23:59:59.000Z

258

Light Sterile Neutrinos and Short Baseline Neutrino Oscillation Anomalies  

E-Print Network (OSTI)

We study two possible explanations for short baseline neutrino oscillation anomalies, such as the LSND and MiniBooNE anti-neutrino data, and for the reactor anomaly. The first scenario is the mini-seesaw mechanism with two eV-scale sterile neutrinos. We present both analytic formulas and numerical results showing that this scenario could account for the short baseline and reactor anomalies and is consistent with the observed masses and mixings of the three active neutrinos. We also show that this scenario could arise naturally from an effective theory containing a TeV-scale VEV, which could be related to other TeV-scale physics. The minimal version of the mini-seesaw relates the active-sterile mixings to five real parameters and favors an inverted hierarchy. It has the interesting property that the effective Majorana mass for neutrinoless double beta decay vanishes, while the effective masses relevant to tritium beta decay and to cosmology are respectively around 0.2 and 2.4 eV. The second scenario contains only one eV-scale sterile neutrino but with an effective non-unitary mixing matrix between the light sterile and active neutrinos. We find that though this may explain the anomalies, if the non-unitarity originates from a heavy sterile neutrino with a large (fine-tuned) mixing angle, this scenario is highly constrained by cosmological and laboratory observations.

JiJi Fan; Paul Langacker

2012-01-31T23:59:59.000Z

259

Ensemble based sensing anomaly detection in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are often used to monitor and measure physical characteristics from remote and sometimes hostile environments. In these circumstances the sensing data accuracy is a crucial attribute for the way these applications complete their ... Keywords: Binary classifier, Data accuracy, Ensemble based systems, Sensors anomalies, Wireless sensor networks

Daniel-Ioan Curiac; Constantin Volosencu

2012-08-01T23:59:59.000Z

260

Embedded Cyber-Physical Anomaly Detection in Smart Meters  

E-Print Network (OSTI)

Embedded Cyber-Physical Anomaly Detection in Smart Meters Massimiliano Raciti, Simin Nadjm vulnerabilities that arise from deployment of local cyber-physical attacks at a smart metering location at destabilisation. In this paper we study a smart metering device that uses a trusted platform for storage

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


261

Proceedings of the Axial Offset Anomaly (AOA) Science Workshop  

SciTech Connect

This report presents proceedings of the Axial Offset Anomaly (AOA) Science Workshop, held February 10-11 in Palo Alto, California. Twenty-two papers were presented on various aspects of AOA by utilities, EPRI Robust Fuel Program contractors, staff from EPRI and universities, international researchers, and equipment vendors.

None

2003-06-01T23:59:59.000Z

262

Combining filtering and statistical methods for anomaly detection  

Science Conference Proceedings (OSTI)

In this work we develop an approach for anomaly detection for large scale networks such as that of an enterprize or an ISP. The traffic patterns we focus on for analysis are that of a network-wide view of the traffic state, called the traffic matrix. ...

Augustin Soule; Kavé Salamatian; Nina Taft

2005-10-01T23:59:59.000Z

263

A RE-INTRODUCTION TO ANOMALIES OF CRITICALITY  

SciTech Connect

In 1974, a small innocuous document was submitted to the American Nuclear Society's Criticality Safety Division for publication that would have lasting impacts on this nuclear field The author was Duane Clayton, manager of the Battelle Pacific Northwest National Laboratory's Critical Mass Lab, the world's preeminent reactor critical experimenter with plutonium solutions. The document was entitled, 'Anomalies of Criticality'. 'Anomalies...' was a compilation of more than thirty separate and distinct examples of departures from what might be commonly expected in the field of nuclear criticality. Mr. Clayton's publication was the derivative of more than ten thousand experiments and countless analytical studies conducted world-wide on every conceivable reactor system imaginable: from fissile bearing solutions to solids, blocks to arrays of fuel rods, low-enriched uranium oxide systems to pure plutonium and highly enriched uranium systems. After publication, the document was commonly used within the nuclear fuel cycle and reactor community to train potential criticality/reactor analysts, experimenters and fuel handlers on important things for consideration when designing systems with critically 'safe' parameters in mind The purpose of this paper is to re-introduce 'Anomalies of Criticality' to the current Criticality Safety community and to add new 'anomalies' to the existing compendium. By so doing, it is the authors' hope that a new generation of nuclear workers and criticality engineers will benefit from its content and might continue to build upon this work in support of the nuclear renaissance that is about to occur.

PUIGH RJ

2009-09-09T23:59:59.000Z

264

Momentive Performance Materials Inc MPM | Open Energy Information  

Open Energy Info (EERE)

Momentive Performance Materials Inc MPM Momentive Performance Materials Inc MPM Jump to: navigation, search Name Momentive Performance Materials Inc (MPM) Place Albany, New York Zip 12211 Product New York-based subsidiary that operates in two segments namely silicones and quartz. These versatile materials help enable new developments across industrial and consumer applications. Coordinates 42.707237°, -89.436378° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.707237,"lon":-89.436378,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

265

Magnetic structure of Loihi Seamount, an active hotspot volcano in the Hawaiian Island chain  

E-Print Network (OSTI)

The use of geophysical techniques to image the interiors of active volcanoes can provide a better understanding of their structure and plumbing. The need for such information is especially critical for undersea volcanoes, whose environment makes them difficult to investigate. Because undersea volcanoes are made up of highly magnetic basaltic rock, it is possible to use variations in the magnetic field to explore the internal structure of such edifices. This study combines magnetic survey data from 12 research cruises to make a magnetic anomaly map of volcanically active Loihi, located in the Hawaiian Island chain. NRM intensities and susceptibility measurements were measured from recovered rock samples and suggest that magnetic properties of Loihi are widely varied (NRM intensities range from 1-157 A/m and susceptibilities from 1.26 x 10-3 to 3.62 x 10-2 S.I.). The average NRM intensity is 26 A/m. The size and strength of magnetic source bodies were determined by using various modeling techniques. A strongly magnetized shield can explain most of the anomaly with a large nonmagnetic zone inside, beneath the summit. Prominent magnetic highs are located along Loihi's north and south rift zone dikes and modeling solutions suggest strongly magnetized source bodies in these areas as well as a thin, magnetic layer atop the nonmagnetic zone. The strong magnetic anomalies found along the volcano's rift zones cannot be readily attributed to recent lava flows at the surface. Instead, the source bodies must continue several kilometers in depth to give reasonable magnetization values and are interpreted as dike intrusions. Nonmagnetic anomalies at the summit and south of the summit suggest the presence of a magma system. The model solution suggests Loihi is an inhomogeneously magnetized seamount with highly magnetic dike intrusions along the rift zones with a nonmagnetic body at its center overlain with a magnetic layer.

Lamarche, Amy J.

2003-12-01T23:59:59.000Z

266

Impact of motion along the field direction on geometric-phase-induced false electric dipole moment signals  

E-Print Network (OSTI)

Geometric-phase-induced false electric dipole moment (EDM) signals, resulting from interference between magnetic field gradients and particle motion in electric fields, have been studied extensively in the literature, especially for neutron EDM experiments utilizing stored ultracold neutrons and co-magnetometer atoms. Previous studies have considered particle motion in the transverse plane perpendicular to the direction of the applied electric and magnetic fields. We show, via Monte Carlo studies, that motion along the field direction can impact the magnitude of this false EDM signal if the wall surfaces are rough such that the wall collisions can be modeled as diffuse, with the results dependent on the size of the storage cell's dimension along the field direction.

H. Yan; B. Plaster

2011-04-07T23:59:59.000Z

267

Disentangling the Mn moments on different sublattices in the half-metallic ferrimagnet Mn3?xCoxGa  

SciTech Connect

Ferrimagnetic Mn{sub 3-x}Co{sub x}Ga compounds have been investigated by magnetic circular dichroism in x-ray absorption (XMCD). Compounds with x > 0.5 crystallize in the CuHg{sub 2}Ti structure. A tetragonal distortion of the cubic structure occurs for x {le} 0.5. For the cubic phase, magnetometry reveals a linearly increasing magnetization of 2x Bohr magnetons per formula unit obeying the generalized Slater-Pauling rule. XMCD confirms the ferrimagnetic character with Mn atoms occupying two different sublattices with antiparallel spin orientation and different degrees of spin localization and identifies the region 0.6 < x {le} 0.8 as most promising for a high spin polarization at the Fermi level. Individual Mn moments on inequivalent sites are compared to theoretical predictions.

Klaer, P.; Jenkins, C.A.; Alijani, V.; Winterlik, J.; Balke, B.; Felser, C.; Elmers, H.J.

2011-05-03T23:59:59.000Z

268

L-Moment Estimators as Applied to Gamma Drop Size Distributions  

Science Conference Proceedings (OSTI)

The traditional approach with experimental raindrop size data has been to use the method of moments in the fitting procedure to estimate the parameters for the raindrop size distribution function. However, the moment method is known to be biased ...

Donna V. Kliche; Paul L. Smith; Roger W. Johnson

2008-12-01T23:59:59.000Z

269

Speeding Up the Computation of WRF Double Moment 6-Class Microphysics Scheme with GPU  

Science Conference Proceedings (OSTI)

Weather Research and Forecasting (WRF) Double Moment 6-class (WDM6) microphysics scheme implements a double moment bulk microphysical parameterization of clouds and precipitation and is applicable in mesoscale and general circulation models. WDM6 ...

J. Mielikainen; B. Huang; H.-L. A. Huang; M. D. Goldberg; A. Mehta

270

Quantum spins mimic refrigerator magnets - Argonne National Laboratories,  

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

Highlights > Quantum spins mimic refrigerator Highlights > Quantum spins mimic refrigerator magnets Quantum spins mimic refrigerator magnets By Joseph Bernstein * October 11, 2012 The behavior of magnetic moments in metal oxides such as layered iridium is dominated by strong spin-orbit coupling effects. In layered compounds such as Sr3Ir2O7 (shown on the left), the direction of these moments (blue arrows) is controlled at the quantum level by dipolar interactions that are akin to those of classical bar magnets. Another outcome is an unprecedented 'magnon gap' (shown at right), which was measured at the Argonne Advanced Photon Source and reveals that these underlying dipolar magnetic interactions are extremely strong. Current electronic devices depend on manipulating charge. Alternative approaches may rely on not only charge but also the spin of electrons.

271

Persistent Anomalies of the Extratropical Northern Hemisphere Wintertime Circulation: Geographical Distribution and Regional Persistence Characteristics  

Science Conference Proceedings (OSTI)

We have studied the geographical and regional persistence characteristics of wintertime Northern Hemisphere 500 mb height anomalies, focusing particular attention on the behavior of strong anomalies that persist beyond the durations associated ...

Randall M. Dole; Neil D. Gordon

1983-08-01T23:59:59.000Z

272

Dynamical Seasonal Forecasts during the 1997/98 ENSO Using Persisted SST Anomalies  

Science Conference Proceedings (OSTI)

An evaluation of trial seasonal forecasts during the 1997/98 El Niño, using an atmospheric GCM forced by persisted sea surface temperature and sea-ice anomalies, is presented. Generally, forecasts of seasonal anomalies of precipitation, surface ...

Carsten S. Frederiksen; Huqiang Zhang; Ramesh C. Balgovind; Neville Nicholls; Wasyl Drosdowsky; Lynda Chambers

2001-06-01T23:59:59.000Z

273

West African Monsoon Dynamics and Eastern Equatorial Atlantic and Pacific SST Anomalies (1970–88)  

Science Conference Proceedings (OSTI)

The Laboratoire de Météorologie Dynamique atmospheric GCM is used to investigate relationships between West African monsoon dynamics and SST anomalies in the eastern equatorial Atlantic and Pacific for the period 1970–88. Positive SST anomalies ...

Serge Janicot; Ali Harzallah; Bernard Fontaine; Vincent Moron

1998-08-01T23:59:59.000Z

274

The Winter Atmospheric Response to Sea Ice Anomalies in the Barents Sea  

Science Conference Proceedings (OSTI)

The atmospheric response to sea ice anomalies over the Barents Sea during winter was determined by boundary forcing the Community Atmosphere Model (CAM) with daily varying high and low sea ice concentration (SIC) anomalies that decreased ...

Jessica Liptak; Courtenay Strong

2014-01-01T23:59:59.000Z

275

Diagenetic and Detrial Origin of Moretane Anomalies through the Permian-Triassic Boundary  

E-Print Network (OSTI)

Many biogeochemical anomalies coincide with the Late Permian Extinction (LPE; 252.28 Ma). Several mechanisms have been proposed to explain the moretane/hopane anomaly that has been identified in samples from Meishan GSSP ...

French, Katherine L.

276

Potential Vorticity Diagnosis of the Severe Convective Regime. Part II: The Impact of Idealized PV Anomalies  

Science Conference Proceedings (OSTI)

Idealized numerical experiments are conducted to understand the effect of upper-tropospheric potential vorticity (PV) anomalies on an environment conducive to severe weather. Anomalies are specified as a single isolated vortex, a string of ...

John W. Nielsen-Gammon; David A. Gold

2008-05-01T23:59:59.000Z

277

How Total Precipitable Water Vapor Anomalies Relate to Cloud Vertical Structure  

Science Conference Proceedings (OSTI)

The NOAA operational total precipitable water (TPW) anomaly product is available to forecasters to display percentage of normal TPW in real time for applications like heavy precipitation forecasts. In this work, the TPW anomaly is compared to ...

John M. Forsythe; Jason B. Dodson; Philip T. Partain; Stanley Q. Kidder; Thomas H. Vonder Haar

2012-04-01T23:59:59.000Z

278

Numerical Simulation of the Atmospheric Response to Equatorial Pacific Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

A number of recent observational and theoretical studies indicate that under certain conditions tropical sea surface temperature anomalies may be capable of producing climatic anomalies at extratropical latitudes. According to the hypothesis put ...

J. Shukla; J. M. Wallace

1983-07-01T23:59:59.000Z

279

Hemispheric Anomalies of 700 mb Height Related to Mean Temperature for Fall, Winter and Spring in the United States  

Science Conference Proceedings (OSTI)

Zonally averaged composite anomalies of 700 mb height for years preceding and during four warm winters in the contiguous United States show generally positive anomalies over subtropical and middle latitudes and generally negative anomalies over ...

Carl O. Erickson

1984-03-01T23:59:59.000Z

280

A high order moment method simulating evaporation and advection of a polydisperse liquid spray  

Science Conference Proceedings (OSTI)

In this paper, we tackle the modeling and numerical simulation of sprays and aerosols, that is dilute gas-droplet flows for which polydispersity description is of paramount importance. Starting from a kinetic description for point particles experiencing ... Keywords: Aerosols, Canonical moments, Eulerian multi-fluid model, High order moment method, Kinetic finite volume schemes, Maximum entropy reconstruction, Moment space, Polydisperse sprays

D. Kah; F. Laurent; M. Massot; S. Jay

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Experimental comparison of orthogonal moments as feature extraction methods for character recognition  

Science Conference Proceedings (OSTI)

The selection of a good feature extraction technique is very important in any classification problem. Moments, especially orthogonal moments, seem to be a powerful option in the case of digital image compression, description and recognition. Nowadays, ... Keywords: character recognition, feature extraction, orthogonal moments

Miguel A. Duval; Sandro Vega-Pons; Eduardo Garea

2010-11-01T23:59:59.000Z

282

Phonon anomalies induced by polar nano-regions in a relaxor ...  

Science Conference Proceedings (OSTI)

... Phonon anomalies induced by polar nano-regions in a relaxor Ferroelectric. Guangyong Xu (BNL, New York). Inelastic neutron ...

283

Electronic and Magnetic Properties of Metal-Doped BN Sheet: A First-Principles Study  

SciTech Connect

Electronic and magnetic properties of BN sheet doped with 3d transition metals (Fe, Co and Ni) have been investigated using ab initio calculations. Our calculations show many interesting physical properties in metal-doped BN sheet. Fe-doped BN sheet is a half-metal with the magnetic moment of 2.0 ?B, and Co-doped BN sheet becomes a narrow-gap semiconductor with the magnetic moment of 1.0 ?B. However, no magnetic moment is induced on Ni-doped BN sheet, which has the same band gap as pristine BN sheet. Furthermore, Fe atom is easy to form isolated particle on BN sheet, while Ni and Co atoms are likely to form sheet-supported metal nanotemplate. These results are useful for spintronics application and could help in the development of magnetic nanotructures and metallic nanotemplate at room temperature.

Zhou, Yungang; Xiao-Dong, J.; Wang, Zhiguo; Xiao, Haiyan Y.; Gao, Fei; Zu, Xiaotao T.

2010-07-21T23:59:59.000Z

284

Superconducting Magnets  

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

magnet technology has allowed physicists to attain higher energies in circular accelerators. One can obtain higher magnetic fields because there is no resistance in a...

285

Atmospheric 210 Po anomaly as a precursor of volcano  

E-Print Network (OSTI)

that this is appropriate for all the waste sited at the moment. Spent412 fuel and plutonium may not actually need disposal. Whilst burning plutonium in PRISM could reduce the424 quantity of plutonium by 50%, the requirement for plutonium to provided in425 the form of a metal confers some additional challenges, when compared to426

Huh, Chih-An

286

Geomagnetic Precursor Z Component Diurnal Variation Phase Anomaly Recognition based on the Pattern Distance  

Science Conference Proceedings (OSTI)

Geomagnetic precursor is one of many earthquake precursors, which have better effects on earthquake prediction, while the diurnal variation anomaly of geomagnetic precursor Z component is an important one in short-impending anomalies. Basing on the pattern ... Keywords: Geomagnetic Precursor, Diurnal Variation, Pattern Distance, Anomaly Recognition

Shaochun Wu; Tongyu Yuan; Yan Tang; Bofeng Zhang; Daming Wei

2010-06-01T23:59:59.000Z

287

Using Echo State Networks for Anomaly Detection in Underground Coal Mines  

Science Conference Proceedings (OSTI)

We investigate the problem of identifying anomalies in monitoring critical gas concentrations using a sensor network in an underground coal mine. In this domain, one of the main problems is a provision of mine specific anomaly detection, with cyclical ... Keywords: sensor networks, anomaly detection, recurrent neural networks, echo state networks, bayesian networks, coal mines

Oliver Obst; X. Rosalind Wang; Mikhail Prokopenko

2008-04-01T23:59:59.000Z

288

Quadrupole moments of rotating neutron stars and strange stars  

E-Print Network (OSTI)

We present results for models of neutron stars and strange stars constructed using the Hartle-Thorne slow-rotation method with a wide range of equations of state, focusing on the values obtained for the angular momentum $J$ and the quadrupole moment $Q$, when the gravitational mass $M$ and the rotational frequency $\\Omega$ are specified. Building on previous work, which showed surprising uniformity in the behaviour of the moment of inertia for neutron-star models constructed with widely-different equations of state, we find similar uniformity for the quadrupole moment. These two quantities, together with the mass, are fundamental for determining the vacuum space-time outside neutron stars. We study particularly the dimensionless combination of parameters $QM/J^2$ (using units for which $c=G=1$). This quantity goes to 1 in the case of a Kerr-metric black hole and deviations away from 1 then characterize the difference between neutron-star and black-hole space-times. It is found that $QM/J^2$ for both neutron stars and strange stars decreases with increasing mass, for a given equation of state, reaching a value of around 2 (or even less) for maximum-mass models, meaning that their external space-time is then rather well approximated by the Kerr metric. If $QM/J^2$ is plotter against compactness $R/2M$ (where $R$ is the radius), it is found that the relationship is nearly unique for neutron-star models, independent of the equation of state, while it is significantly different for strange stars. This gives a new way of possibly distinguishing between them.

Martin Urbanec; John C. Miller; Zdenek Stuchlik

2013-01-24T23:59:59.000Z

289

Moments of the transmission eigenvalues, proper delay times and random matrix theory I  

E-Print Network (OSTI)

We develop a method to compute the moments of the eigenvalue densities of matrices in the Gaussian, Laguerre and Jacobi ensembles for all the symmetry classes beta = 1,2, 4 and finite matrix dimension n. The moments of the Jacobi ensembles have a physical interpretation as the moments of the transmission eigenvalues of an electron through a quantum dot with chaotic dynamics. For the Laguerre ensemble we also evaluate the finite n negative moments. Physically, they correspond to the moments of the proper delay times, which are the eigenvalues of the Wigner-Smith matrix. Our formulae are well suited to an asymptotic analysis as n -> infinity.

F. Mezzadri; N. J. Simm

2011-03-31T23:59:59.000Z

290

Tropospheric and Lower Stratospheric Temperature Anomalies Based on Global  

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

Tropospheric and Lower Stratospheric Temperature Anomalies Based on Global Tropospheric and Lower Stratospheric Temperature Anomalies Based on Global Radiosonde Network Data DOI: 10.3334/CDIAC/cli.004 data Data image Graphics Investigators Alexander M. Sterin Russian Research Institute for Hydrometeorological Information-World Data Center (RIHMI-WDC), 6, Korolyov str., Obninsk, Kaluga region, Russia, 249035 Period of Record January, 1958 - September, 2005 (relative to the average for 1961-1975). Methods The observed radiosonde data from the Comprehensive Aerological Reference Data Set (CARDS) (Eskridge et al. 1995) were taken as the primary input for obtaining the series. These data were for the global radiosonde observational network through 2001. Since 2002, the AEROSTAB data (uper-air observations obtained through communication channels), collected at

291

Consistent description of kinetic equation with triangle anomaly  

SciTech Connect

We provide a consistent description of the kinetic equation with a triangle anomaly which is compatible with the entropy principle of the second law of thermodynamics and the charge/energy-momentum conservation equations. In general an anomalous source term is necessary to ensure that the equations for the charge and energy-momentum conservation are satisfied and that the correction terms of distribution functions are compatible to these equations. The constraining equations from the entropy principle are derived for the anomaly-induced leading order corrections to the particle distribution functions. The correction terms can be determined for the minimum number of unknown coefficients in one charge and two charge cases by solving the constraining equations.

Pu Shi; Gao Jianhua; Wang Qun [Interdisciplinary Center for Theoretical Study and Department of Modern Physics, University of Science and Technology of China, Hefei 230026 (China)

2011-05-01T23:59:59.000Z

292

Bulk viscosity and the conformal anomaly in the pion gas  

E-Print Network (OSTI)

We calculate the bulk viscosity of the massive pion gas within Unitarized Chiral Perturbation Theory. We obtain a low temperature peak arising from explicit conformal breaking due to the pion mass and another peak near the critical temperature, dominated by the conformal anomaly through gluon condensate terms. The correlation between bulk viscosity and conformal breaking supports a recent QCD proposal. We discuss the role of resonances, heavier states and large-$N_c$ counting.

D. Fernandez-Fraile; A. Gomez Nicola

2008-09-26T23:59:59.000Z

293

A RE-INTRODUCTION TO ANOMALIES OF CRITICALITY  

SciTech Connect

In 1974, a small innocuous document was submitted to the American Nuclear Society's Criticality Safety Division for publication that would have lasting impacts on this nuclear field The author was Duane Clayton, manager of the Battelle Pacific Northwest National Laboratory's Critical Mass Lab, the world's preeminent reactor critical experimenter with plutonium solutions. The document was entitled, 'Anomalies of Criticality'. 'Anomalies...' was a compilation of more than thirty separate and distinct examples of departures from what might be commonly expected in the field of nuclear criticality. Mr. Clayton's publication was the derivative of more than ten thousand experiments and countless analytical studies conducted world-wide on every conceivable reactor system imaginable: from fissile bearing solutions to solids, blocks to arrays of fuel rods, low-enriched uranium oxide systems to pure plutonium and highly enriched uranium systems. After publication, the document was commonly used within the nuclear fuel cycle and reactor community to train potential criticality/reactor analysts, experimenters and fuel handlers on important things for consideration when designing systems with critically 'safe' parameters in mind The purpose of this paper is to re-introduce 'Anomalies of Criticality' to the current Criticality Safety community and to add new 'anomalies' to the existing compendium. By so doing, it is the authors' hope that a new generation of nuclear workers and criticality engineers will benefit from its content and might continue to build upon this work in support of the nuclear renaissance that is about to occur.

PUIGH RJ

2009-09-09T23:59:59.000Z

294

The Pioneer Anomaly: Seeking an explanation in newly recovered data  

E-Print Network (OSTI)

The Pioneer 10 and 11 spacecraft yielded very accurate navigation that was limited only by a small, anomalous frequency drift of their carrier signals received by the NASA Deep Space Network (DSN). This discrepancy, evident in the data for both spacecraft, was interpreted as an approximately constant acceleration and has become known as the Pioneer anomaly. The origin of this anomaly is yet unknown. Recent efforts to explain the effect included a search for independent confirmation, analyses of conventional mechanisms, even ideas rooted in new physics, and proposals for a dedicated mission. We assert that before any discussion of new physics and (or) a dedicated mission can take place, one must analyze the entire set of radiometric Doppler data received from Pioneer 10 and 11. We report on our efforts to recover and utilize the complete set of radio Doppler and telemetry records of both spacecraft. The collection of radio Doppler data for both missions is now complete; we are ready to begin its evaluation. We also made progress utilizing the recently recovered Pioneer telemetry data. We present a strategy for studying the effect of on-board generated small forces with this telemetry data, in conjunction with the analysis of the entire set of the Pioneer Doppler data. We report on the preparations for the upcoming analysis of the newly recovered data with the ultimate goal of determining the origin of the Pioneer anomaly. Finally, we discuss implications of our on-going research of the Pioneer anomaly for other missions, most notably for New Horizons, NASA's recently launched mission to Pluto.

Viktor T Toth; Slava G Turyshev

2006-03-07T23:59:59.000Z

295

PWR Axial Offset Anomaly (AOA) Guidelines, Revision 1  

Science Conference Proceedings (OSTI)

Axial offset anomaly (AOA) is defined as a significant negative axial offset deviation from the predicted nuclear design value. AOA results from the incorporation of boron within corrosion product deposits on the upper spans of high-duty pressurized water reactor (PWR) fuel assemblies. The consequences of this process are an erosion of shutdown margin and loss of operational flexibility by control room operators, particularly during power transients.

2004-06-28T23:59:59.000Z

296

Axion emission from a magnetized neutron gas  

SciTech Connect

By using the polarization density matrix for a neutron in a magnetic field, the axion luminosity of magnetic neutron stars that is associated with the flip of the anomalous magnetic moment of degenerate nonrelativistic neutrons is calculated. It is shown that, at values of the magnetic-field induction in the region B Greater-Than-Or-Equivalent-To 10{sup 18} G, this mechanism of axion emission is dominant in 'young' neutron stars of temperature about a few tens of MeV units. At B {approx} 10{sup 17} G, it is one of the basic mechanisms. The Fermi energy of a degenerate neutron gas in a magnetic field is found, and it is shown that there is no such mechanism of axion emission in the degenerate case.

Skobelev, V. V., E-mail: v.skobelev@inbox.ru [Moscow State Industrial University (Russian Federation)

2011-01-15T23:59:59.000Z

297

Light Sterile Neutrinos and Short Baseline Neutrino Oscillation Anomalies  

E-Print Network (OSTI)

We study two possible explanations for short baseline neutrino oscillation anomalies, such as the LSND and MiniBooNE anti-neutrino data, and for the reactor anomaly. The first scenario is the mini-seesaw mechanism with two eV-scale sterile neutrinos. We present both analytic formulas and numerical results showing that this scenario could account for the short baseline and reactor anomalies and is consistent with the observed masses and mixings of the three active neutrinos. We also show that this scenario could arise naturally from an effective theory containing a TeV-scale VEV, which could be related to other TeV-scale physics. The minimal version of the mini-seesaw relates the active-sterile mixings to five real parameters and favors an inverted hierarchy. It has the interesting property that the effective Majorana mass for neutrinoless double beta decay vanishes, while the effective masses relevant to tritium beta decay and to cosmology are respectively around 0.2 and 2.4 eV. The second scenario contains o...

Fan, JiJi

2012-01-01T23:59:59.000Z

298

Geological isotope anomalies as signatures of nearby supernovae  

E-Print Network (OSTI)

Nearby supernova explosions may cause geological isotope anomalies via the direct deposition of debris or by cosmic-ray spallation in the earth's atmosphere. We estimate the mass of material deposited terrestrially by these two mechanisms, showing the dependence on the supernova distance. A number of radioactive isotopes are identified as possible diagnostic tools, such as Be-10, Al-26, Cl-36, Mn-53, Fe-60, and Ni-59, as well as the longer-lived I-129, Sm-146, and Pu-244. We discuss whether the 35 and 60 kyr-old Be-10 anomalies observed in the Vostok antarctic ice cores could be due to supernova explosions. Combining our estimates for matter deposition with results of recent nucleosynthesis yields, we calculate the expected signal from nearby supernovae using ice cores back to \\sim 300 kyr ago, and we discuss using deep ocean sediments back to several hundred Myr. In particular, we examine the prospects for identifying isotope anomalies due to the Geminga supernova explosion, and signatures of the possibility...

Ellis, Jonathan Richard; Schramm, David N; Ellis, John; Fields, Brian D; Schramm, David N

1996-01-01T23:59:59.000Z

299

The trace anomaly and dynamical vacuum energy in cosmology  

Science Conference Proceedings (OSTI)

The trace anomaly of conformal matter implies the existence of massless scalar poles in physical amplitudes involving the stress-energy tensor. These poles may be described by a local effective action with massless scalar fields, which couple to classical sources, contribute to gravitational scattering processes, and can have long range gravitational effects at macroscopic scales. In an effective field theory approach, the effective action of the anomaly is an infrared relevant term that should be added to the Einstein-Hilbert action of classical General Relativity to take account of macroscopic quantum effects. The additional scalar degrees of freedom contained in this effective action may be understood as responsible for both the Casimir effect in flat spacetime and large quantum backreaction effects at the horizon scale of cosmological spacetimes. These effects of the trace anomaly imply that the cosmological vacuum energy is dynamical, and its value depends on macroscopic boundary conditions at the cosmological horizon scale, rather than sensitivity to the extreme ultraviolet Planck scale.

Mottola, Emil [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

300

Anomaly Detection in Multiple Scale for Insider Threat Analysis  

Science Conference Proceedings (OSTI)

We propose a method to quantify malicious insider activity with statistical and graph-based analysis aided with semantic scoring rules. Different types of personal activities or interactions are monitored to form a set of directed weighted graphs. The semantic scoring rules assign higher scores for the events more significant and suspicious. Then we build personal activity profiles in the form of score tables. Profiles are created in multiple scales where the low level profiles are aggregated toward more stable higherlevel profiles within the subject or object hierarchy. Further, the profiles are created in different time scales such as day, week, or month. During operation, the insider s current activity profile is compared to the historical profiles to produce an anomaly score. For each subject with a high anomaly score, a subgraph of connected subjects is extracted to look for any related score movement. Finally the subjects are ranked by their anomaly scores to help the analysts focus on high-scored subjects. The threat-ranking component supports the interaction between the User Dashboard and the Insider Threat Knowledge Base portal. The portal includes a repository for historical results, i.e., adjudicated cases containing all of the information first presented to the user and including any additional insights to help the analysts. In this paper we show the framework of the proposed system and the operational algorithms.

Kim, Yoohwan [ORNL; Sheldon, Frederick T [ORNL; Hively, Lee M [ORNL

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Magnetic Monopoles in Spin Ice  

E-Print Network (OSTI)

Electrically charged particles, such as the electron, are ubiquitous. By contrast, no elementary particles with a net magnetic charge have ever been observed, despite intensive and prolonged searches. We pursue an alternative strategy, namely that of realising them not as elementary but rather as emergent particles, i.e., as manifestations of the correlations present in a strongly interacting many-body system. The most prominent examples of emergent quasiparticles are the ones with fractional electric charge e/3 in quantum Hall physics. Here we show that magnetic monopoles do emerge in a class of exotic magnets known collectively as spin ice: the dipole moment of the underlying electronic degrees of freedom fractionalises into monopoles. This enables us to account for a mysterious phase transition observed experimentally in spin ice in a magnetic field, which is a liquid-gas transition of the magnetic monopoles. These monopoles can also be detected by other means, e.g., in an experiment modelled after the celebrated Stanford magnetic monopole search.

Claudio Castelnovo; Roderich Moessner; Shivaji L. Sondhi

2007-10-30T23:59:59.000Z

302

Integrity bases for covariants of tetrahedral XY4 molecules. Application to the electric dipole moment surface  

E-Print Network (OSTI)

Techniques of invariant theory such as Molien generating functions and integrity bases offer mathematical tools for the efficient construction of symmetry--adapted polynomials in the symmetrized coordinates of a molecular system. The present article is the prolongation of our previous work [P. Cassam-Chena\\"i and F. Patras, J. Math. Chem., 44(4), 938--966 (2008).] to the case of polynomials that transform as a non--totally symmetric irreducible representation of the symmetry group $G$ of the molecule. Such a covariant representation occurs with electric or magnetic properties, for example with the electric dipole moment surface. The symmetrized coordinates span an initial reducible representation from which polynomials transforming as an irreducible representation are built. The number of linearly independent polynomials of degree $k$ within this final representation is given by the coefficient of degree $k$ in the Taylor expansion of the associated Molien function. This generating function is built from combination of elementary generating functions where both the initial and final representations are irreducible. In parallel, Clebsch--Gordan coefficients of the symmetry group $G$ recursively couples the corresponding elementary integrity bases in order to build the integrity bases for the initial representation associated to symmetrized coordinates. The method is illustrated in detail on XY4 type of molecules for which the explicit integrity bases for the five final irreducible representations are given.

Patrick Cassam-Chenaï; Guillaume Dhont; Frédéric Patras

2013-11-04T23:59:59.000Z

303

Strong dependence of ultracold chemical rates on electric dipole moments  

E-Print Network (OSTI)

We use the quantum threshold laws combined with a classical capture model to provide an analytical estimate of the chemical quenching cross sections and rate coefficients of two colliding particles at ultralow temperatures. We apply this quantum threshold model (QT model) to indistinguishable fermionic polar molecules in an electric field. At ultracold temperatures and in weak electric fields, the cross sections and rate coefficients depend only weakly on the electric dipole moment d induced by the electric field. In stronger electric fields, the quenching processes scale as d^{4(L+1/2)} where L>0 is the orbital angular momentum quantum number between the two colliding particles. For p-wave collisions (L=1) of indistinguishable fermionic polar molecules at ultracold temperatures, the quenching rate thus scales as d^6. We also apply this model to pure two dimensional collisions and find that chemical rates vanish as d^{-4} for ultracold indistinguishable fermions. This model provides a quick and intuitive way ...

Quéméner, Goulven

2010-01-01T23:59:59.000Z

304

The power spectrum of the atomic dipole moment  

E-Print Network (OSTI)

This paper calculates the power spectrum S(omega) of the electric field generated by the atomic dipole moment of a laser-driven two-level system from an open quantum systems perspective. Its shape is similar to the shape of Mollow's resonance fluorescence spectrum but there are some differences. For sufficiently strong laser driving, there are two sidebands but their relative height is reduced. Moreover, the amplitude of this spectrum has a different dependence on the laser Rabi frequency Omega. It does not vanish when Omega tends to zero. The calculation of the spectrum which we present here involves less approximations than the calculation of Mollow's spectrum and constitutes an interesting alternative property.

Adam Stokes; Almut Beige

2013-03-31T23:59:59.000Z

305

Nuclear electric dipole moment of {sup 3}He  

Science Conference Proceedings (OSTI)

In the no-core shell model (NCSM) framework, we calculate the {sup 3}He electric dipole moment (EDM) generated by parity- and time-reversal violation in the nucleon-nucleon interaction. While the results are somehow sensitive to the interaction model chosen for the strong two- and three-body interactions, we demonstrate the pion-exchange dominance to the EDM of {sup 3}He, if the coupling constants for {pi}, {rho} and {omega}-exchanges are of comparable magnitude, as expected. Finally, our results suggest that a measurement of {sup 3}He EDM would be complementary to the currently planned neutron and deuteron experiments, and would constitute a powerful constraint to the models of the pion P- and T-violating interactions.

Stetcu, I.; Friar, J. L.; Hayes, A. C. [Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Liu, C.-P. [Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States); Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Navratil, P. [Lawrence Livermore National Laboratory, P.O. Box 808, L-414, California 94551 (United States)

2009-01-28T23:59:59.000Z

306

Shell model estimate of electric dipole moment in medium and heavy nuclei  

SciTech Connect

The nuclear electric dipole moment (EDM) and the nuclear Schiff moment for the lowest 1/2{sup +} state of {sup 129}Xe are investigated in terms of the nuclear shell model. We estimate the upper limit for the EDM of neutral {sup 129}Xe atom using the Schiff moment. We also estimate the upper limit of the nuclear EDM, which may be directly measured through ionic atoms.

Yoshinaga, Naotaka [Department of Physics, Saitama University, Saitama City 338-8570 (Japan); Higashiyama, Koji [Department of Physics, Chiba Institute of Technology, Narashino, Chiba 275-0023 (Japan)

2011-05-06T23:59:59.000Z

307

Magnetic Storms  

Science Conference Proceedings (OSTI)

... magnetic reversal. As there is no predictive science of geomagnetism, we currently lack even simple forecasts. Our scientific ...

2010-10-05T23:59:59.000Z

308

Magnetic Imaging  

Science Conference Proceedings (OSTI)

... data-storage and permanent magnets with increased energy products, in ... Optimization of future materials, including improved yields, requires an ...

2012-10-02T23:59:59.000Z

309

Magnetic Properties  

Science Conference Proceedings (OSTI)

...Since the discovery of high-temperature superconductors in 1986 (Ref 10), the demonstration of magnetic flux exclusion

310

Top quark spin correlations and polarization at the LHC: standard model predictions and effects of anomalous top chromo moments  

E-Print Network (OSTI)

A number of top-spin observables are computed within the Standard Model (SM), at next-to-leading order in the strong and weak gauge couplings for hadronic top-quark anti-quark (ttbar) production and decay at the LHC for center-of-mass energies 7 and 8 TeV. For dileptonic final states we consider the azimuthal angle correlation, the helicity correlation, and the opening angle distribution; for lepton plus jets final states we determine distributions and asymmetries that trace a longitudinal and transverse polarization, respectively, of the t and t-bar samples. The QCD-induced transverse polarization of the top quarks leads to an asymmetry of about 8 percent that should be detectable with existing data. In addition, we investigate the effects of a non-zero chromo-magnetic and chromo-electric dipole moment of the top quark on these and other top-spin observables and associated asymmetries. These observables allow to disentangle the contributions from the real and imaginary parts of these moments.

Werner Bernreuther; Zong-Guo Si

2013-05-09T23:59:59.000Z

311

Electron electric dipole moment experiment using electric-field quantized slow cesium atoms  

E-Print Network (OSTI)

LBNL-51xxx Electron electric dipole momentexperiment using electric-?eld quantized slow cesium atomsA proof-of-principle electron electric dipole moment (e-EDM)

Amini, Jason M.; Munger Jr., Charles T.; Gould, Harvey

2007-01-01T23:59:59.000Z

312

Comment on Pion-nucleon bremsstrahlung and. Delta. electromagnetic moments''  

SciTech Connect

We analyze the definition of the electromagnetic moments of the dressed'' {Delta} introduced by Heller, Kumano, Martinez, and Moniz with respect to gauge invariance.

Weyrauch, M. (Department of Physics and Mathematical Physics, University of Adelaide, Adelaide, South Australia 5001 (AU))

1989-11-01T23:59:59.000Z

313

Three loop MSbar transversity operator anomalous dimensions for fixed moment n <= 8  

E-Print Network (OSTI)

We compute the anomalous dimensions of the transversity operator at three loops in the MSbar scheme for fixed moment n where n n <= 7.

J. A. Gracey

2006-11-07T23:59:59.000Z

314

Using moment invariants to quantify the extent of rafting in Ni-based ...  

Science Conference Proceedings (OSTI)

Author(s), Lily Nguyen, Rongpei Shi, Yunzhi Wang, Marc De Graef. On-Site Speaker (Planned), Lily Nguyen. Abstract Scope, Moment invariants (MIs) are ...

315

Large eddy simulations of coal jet flame ignition using the direct quadrature method of moments.  

E-Print Network (OSTI)

??The Direct Quadrature Method of Moments (DQMOM) was implemented in the Large Eddy Simulation (LES) tool ARCHES to model coal particles. LES coupled with DQMOM… (more)

Pedel, Julien

2012-01-01T23:59:59.000Z

316

A Large Self-Potential Anomaly And Its Changes On The Quiet Mt Fuji, Japan  

Open Energy Info (EERE)

Self-Potential Anomaly And Its Changes On The Quiet Mt Fuji, Japan Self-Potential Anomaly And Its Changes On The Quiet Mt Fuji, Japan Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Large Self-Potential Anomaly And Its Changes On The Quiet Mt Fuji, Japan Details Activities (0) Areas (0) Regions (0) Abstract: Self-potential (SP) surveys were carried out on Mt. Fuji volcano, Japan, and an intense positive anomaly (about 2000 mV) was found in the summit area. The positive SP anomaly was stable on 2001 and 2002, but increased 150 mV in amplitude on September 12, 2003, and suddenly decreased 300 mV two weeks later. This amplitude change coincides with the emergence of the fumaroles, which appeared for the first time in 40 years, on the east-northeast flank 6 km apart from the summit. The SP anomaly is thought

317

Revealing the Degree of Magnetic Frustration by Non-Magnetic Impurities  

SciTech Connect

Imaging the magnetic fields around a non-magnetic impurity can provide a clear benchmark for quantifying the degree of magnetic frustration. Focusing on the strongly frustrated J{sub 1}-J{sub 2} model and the spatially anisotropic J{sub 1a}-J{sub 1b}-J{sub 2} model, very distinct low energy behaviors reflect different levels of magnetic frustration. In the J{sub 1}-J{sub 2} model, bound magnons appear trapped near the impurity in the ground state and strongly reduce the ordered moments for sites proximal to the impurity. In contrast, local moments in the J{sub 1a}-J{sub 1b}-J{sub 2} model are enhanced on the impurity neighboring sites. These theoretical predictions can be probed by experiments such as nuclear magnetic resonance and scanning tunneling microscopy, and the results can elucidate the role of frustration in antiferromagnets and help narrow the possible models to understand magnetism in the iron pnictdies.

Not Available

2011-08-12T23:59:59.000Z

318

Particle-physics constraints from the globular cluster M5: Neutrino Dipole Moments  

E-Print Network (OSTI)

Stellar evolution is modified if energy is lost in a "dark channel" similar to neutrino emission. Comparing modified stellar evolution sequences with observations provides some of the most restrictive limits on axions and other hypothetical low-mass particles and on non-standard neutrino properties. In particular, a putative neutrino magnetic dipole moment mu_nu enhances the plasmon decay process, postpones helium ignition in low-mass stars, and therefore extends the red-giant branch (RGB) in globular clusters (GCs). The brightness of the tip of the RGB (TRGB) remains the most sensitive probe for mu_nu and we revisit this argument from a modern perspective. Based on a large set of archival observations, we provide high-precision photometry for the Galactic GC M5 (NGC5904) and carefully determine its TRGB position. On the theoretical side, we add the extra plasmon decay rate brought about by mu_nu to the Princeton-Goddard-PUC stellar evolution code. Different sources of uncertainty are critically examined. The main source of systematic uncertainty is the bolometric correction and the main statistical uncertainty derives from the distance modulus based on main-sequence fitting. (Other measures of distance, e.g., the brightness of RR Lyrae stars, are influenced by the energy loss that we wish to constrain.) The statistical uncertainty of the TRGB position relative to the brightest RGB star is less important because the RGB is well populated. We infer an absolute I-band brightness of M_I=-4.17+/-0.13 mag for the TRGB compared with the theoretical prediction of -3.99+/-0.07 mag, in reasonable agreement with each other. A significant brightness increase caused by neutrino dipole moments is constrained such that mu_nu<2.6x10^-12mu_B(68% CL), where mu_B is the Bohr magneton, and mu_nu<4.5x10^-12 mu_B(95% CL). In these results, statistical and systematic errors have been combined in quadrature.

Nicolás Viaux; Márcio Catelan; Peter B. Stetson; Georg Raffelt; Javier Redondo; Aldo A. R. Valcarce; Achim Weiss

2013-08-21T23:59:59.000Z

319

The Pioneer Anomaly: Seeking an explanation in newly recovered data  

E-Print Network (OSTI)

The Pioneer 10/11 spacecraft yielded a very accurate navigation that was limited only by a small, anomalous frequency drift of their carrier signals received by the NASA Deep Space Network (DSN). This discrepancy, evident in the data for both spacecraft, was interpreted as an approximately constant acceleration and has become known as the Pioneer anomaly. The origin of this anomaly is as of yet unknown. Recent efforts to explain the effect included a search for independent confirmation, analyses of conventional mechanisms, even ideas rooted in new physics and proposals for a dedicated mission. We assert that before any discussion of new physics and/or a dedicated mission can take place, one must analyze the entire set of radiometric Doppler data received from Pioneers 10 and 11. We report on our efforts to recover and utilize the complete set of radio Doppler and telemetry records of both spacecraft. The collection of radio Doppler data for both missions is now complete; we are ready to begin its evaluation. ...

Toth, V T; Toth, Viktor T; Turyshev, Slava G

2006-01-01T23:59:59.000Z

320

Magnetic Properties of RB66 (R = Gd, Tb, Ho, Er, and Lu)  

SciTech Connect

We report magnetic susceptibility measurements of RB66 (R = Gd, Tb, Ho, Er, and Lu) boron-rich rare earth containing borides down to 50 mK. The data suggest a spin glass low temperature state for RB66 (R = Gd, Tb, Ho, and Er) with the freezing temperatures below 1 K. The magnetic properties appear to be influenced by the anisotropy of the magnetic moments, probably via the crystalline electric field effects.

Kim, Hyunsoo; Budko, Serguei; ATanatar, Makariy; Avdashchenko, D.V.; Matovnikov, A.V.; Mitroshenkov, N.V.; Novikov, V.V.; Prozorov, Ruslan

2012-05-17T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Model dependence of the {sup 2}H electric dipole moment  

Science Conference Proceedings (OSTI)

Background: Direct measurement of the electric dipole moment (EDM) of the neutron is in the future; measurement of a nuclear EDM may well come first. The deuteron is one nucleus for which exact model calculations are feasible. Purpose: We explore the model dependence of deuteron EDM calculations. Methods: Using a separable potential formulation of the Hamiltonian, we examine the sensitivity of the deuteron EDM to variation in the nucleon-nucleon interaction. We write the EDM as the sum of two terms, the first depending on the target wave function with plane-wave intermediate states, and the second depending on intermediate multiple scattering in the {sup 3}P{sub 1} channel, the latter being sensitive to the off-shell behavior of the {sup 3}P{sub 1} amplitude. Results: We compare the full calculation with the plane-wave approximation result, examine the tensor force contribution to the model results, and explore the effect of short-range repulsion found in realistic, contemporary potential models of the deuteron. Conclusions: Because one-pion exchange dominates the EDM calculation, separable potential model calculations will provide an adequate description of the {sup 2}H EDM until such time as a measurement better than 10% is obtained.

Afnan, I. R.; Gibson, B. F. [School of Chemical and Physical Sciences Flinders University, GPO Box 2100, Adelaide 5001 (Australia); Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2010-12-15T23:59:59.000Z

322

A New Moments based Skew Estimation Technique using Pixels in the Word for Binary Document Images  

Science Conference Proceedings (OSTI)

Accurate skew angle estimation is an essential component in document analysis system to enhance the performance of the optical character recognition (OCR). In this paper, a new and efficient moments based method to estimate skew angle of a pixels in ... Keywords: Connected component, Boundary growing, Moments, Skew detection, Optical character recognition.

P. Shivakumara; G. Hemantha Kumar; H. S. Varsha; S. Rekha; M. R. Rashmi Nayaka

2005-08-01T23:59:59.000Z

323

Pricing American Asian options with higher moments in the underlying distribution  

Science Conference Proceedings (OSTI)

We develop a modified Edgeworth binomial model with higher moment consideration for pricing American Asian options. With lognormal underlying distribution for benchmark comparison, our algorithm is as precise as that of Chalasani et al. [P. Chalasani, ... Keywords: American Asian options, Edgeworth binomial model, Higher moment

Keng-Hsin Lo; Kehluh Wang; Ming-Feng Hsu

2009-01-01T23:59:59.000Z

324

P-Moment asymptotic behavior of nonautonomous stochastic differential equation with delay  

Science Conference Proceedings (OSTI)

In this paper, we consider p-moment asymptotic behaviors of a nonautonomous delay stochastic differential equation By using L-operator differential inequality techniques, we get some sufficient criterions for p-moment ultimately ... Keywords: L-operator, exponential stability, neural networks, ultimate boundedness

Bing Li; Yafei Zhou; Qiankun Song

2010-06-01T23:59:59.000Z

325

Anchoring and steering gaussian quadrature for positive definite strong moment functionals  

Science Conference Proceedings (OSTI)

Algorithms for the construction of block-formed orthogonal Laurent polynomial sequences and corresponding Gaussian quadratures associated with positive definite strong moment functionals are introduced and compared. Cost estimates and numerical examples ... Keywords: 42C05, Gaussian quadrature, Ordered orthogonal Laurent polynomial sequences, Positive definite strong moment functionals, Primary 65D32; Secondary 41A20

Brian A. Hagler

2013-01-01T23:59:59.000Z

326

Second-Order Closure PBL Model with New Third-Order Moments: Comparison with LES Data  

Science Conference Proceedings (OSTI)

This paper contains two parts. In the first part, a new set of diagnostic equations is derived for the third-order moments for a buoyancy-driven flow, by exact inversion of the prognostic equations for the third-order moment equations in the ...

V. M. Canuto; F. Minotti; C. Ronchi; R. M. Ypma; O. Zeman

1994-06-01T23:59:59.000Z

327

A 3-D multiband closure for radiation and neutron transfer moment models  

Science Conference Proceedings (OSTI)

We derive a 3D multi-band moment model and its associated closure for radiation and neutron transfer. The new closure is analytical and nonlinear but very simple. Its derivation is based on the maximum entropy closure and assumes a Wien shape for the ... Keywords: Maximum entropy closure, Moment models, Multi-band models, Multi-bin models, Neutron transfer, ODF, Radiative transfer

J. -F. Ripoll; A. A. Wray

2008-02-01T23:59:59.000Z

328

2012 Energy-Saving Moments in the Nation's Capital | Department of Energy  

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

2012 Energy-Saving Moments in the Nation's Capital 2012 Energy-Saving Moments in the Nation's Capital 2012 Energy-Saving Moments in the Nation's Capital January 4, 2013 - 1:02pm Q&A What was your favorite energy-saving moment of 2012? Leave a comment! Addthis Erin R. Pierce Erin R. Pierce Digital Communications Specialist, Office of Public Affairs How can I participate? Share your favorite 2012 energy-saving moment with us and your comment may be featured on Energy.gov! To participate use our Q&A tool or send a comment via Facebook or Twitter. As a new year begins, it's only natural to reflect on the previous year's highlights. From celebrating the completion of Washington, DC's first passive solar house to flipping the switch on LED lighting for the National Mall -- for our nation's capital, 2012 was a year for advancing

329

The Anapole Moment of the Deuteron with the Argonne v18 Nucleon-Nucleon Interaction Model  

E-Print Network (OSTI)

We calculate the deuteron anapole moment with the wave functions obtained from the Argonne $v18$ nucleon-nucleon interaction model. The anapole moment operators are considered at the leading order. To minimize the uncertainty due to a lack of current conservation, we calculate the matrix element of the anapole moment from the original definition. In virtue of accurate wave functions, we can obtain a more precise value of the deuteron anapole moment which contains less uncertainty than the former works. We obtain a result reduced by more than 25% in the magnitude of the deuteron anapole moment. The reduction of individual nuclear contributions is much more important however, varying from a factor 2 for the spin part to a factor 4 for the convection and associated two-body currents.

Chang Ho Hyun; Bertrand Desplanques

2002-06-07T23:59:59.000Z

330

Log Summarization and Anomaly Detection for TroubleshootingDistributed Systems  

SciTech Connect

Today's system monitoring tools are capable of detectingsystem failures such as host failures, OS errors, and network partitionsin near-real time. Unfortunately, the same cannot yet be said of theend-to-end distributed softwarestack. Any given action, for example,reliably transferring a directory of files, can involve a wide range ofcomplex and interrelated actions across multiple pieces of software:checking user certificates and permissions, getting details for allfiles, performing third-party transfers, understanding re-try policydecisions, etc. We present an infrastructure for troubleshooting complexmiddleware, a general purpose technique for configurable logsummarization, and an anomaly detection technique that works in near-realtime on running Grid middleware. We present results gathered using thisinfrastructure from instrumented Grid middleware and applications runningon the Emulab testbed. From these results, we analyze the effectivenessof several algorithms at accurately detecting a variety of performanceanomalies.

Gunter, Dan; Tierney, Brian L.; Brown, Aaron; Swany, Martin; Bresnahan, John; Schopf, Jennifer M.

2007-08-01T23:59:59.000Z

331

Increasing coverage to improve detection of network and host anomalies  

E-Print Network (OSTI)

For intrusion detection, the LERAD algorithm learns a succinct set of comprehensible rules for detecting anomalies, which could be novel attacks. LERAD validates the learned rules on a separate held-out validation set and removes rules that cause false alarms. However, removing rules with possible high coverage can lead to missed detections. We propose three techniques for increasing coverage- Weighting, Replacement and Hybrid. Weighting retains previously pruned rules and associate weights to them. Replacement, on the other hand, substitutes pruned rules with other candidate rules to ensure high coverage. We also present a Hybrid approach that selects between the two techniques based on training data coverage. Empirical results from seven data sets indicate that, for LERAD, increasing coverage by Weighting, Replacement and Hybrid detects more attacks than Pruning with minimal computational overhead.

Gaurav Tandon; Philip K. Chan

2007-01-01T23:59:59.000Z

332

New Horizons and the Onset of the Pioneer Anomaly  

E-Print Network (OSTI)

Analysis of the radio tracking data from the Pioneer 10/11 spacecraft at distances between about 20 - 70 AU from the Sun has indicated the presence of an unmodeled, small, constant, Doppler blue shift which can be interpreted as a constant acceleration of a_P= (8.74 \\pm 1.33) \\times 10^{-8} cm/s^2 directed approximately {\\it towards} the Sun. In addition, there is early (roughly modeled) data from as close in as 5 AU which indicates there may have been an onset of the anomaly near Saturn. We observe that the data now arriving from the New Horizons mission to Pluto and the Kuiper Belt could allow a relatively easy, direct experimental test of whether this onset is associated with distance from the Sun (being, for example, an effect of drag on dark matter). We strongly urge that this test be done.

Nieto, Michael Martin

2008-01-01T23:59:59.000Z

333

New Horizons and the Onset of the Pioneer Anomaly  

E-Print Network (OSTI)

Analysis of the radio tracking data from the Pioneer 10/11 spacecraft at distances between about 20 - 70 AU from the Sun has indicated the presence of an unmodeled, small, constant, Doppler blue shift which can be interpreted as a constant acceleration of a_P= (8.74 \\pm 1.33) \\times 10^{-8} cm/s^2 directed approximately towards the Sun. In addition, there is early (roughly modeled) data from as close in as 5 AU which indicates there may have been an onset of the anomaly near Saturn. We observe that the data now arriving from the New Horizons mission to Pluto and the Kuiper Belt could allow a relatively easy, direct experimental test of whether this onset is associated with distance from the Sun (being, for example, an effect of drag on dark matter). We strongly urge that this test be done.

Michael Martin Nieto

2007-10-26T23:59:59.000Z

334

Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism  

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

Unexpected Angular Dependence of Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Print Wednesday, 29 August 2007 00:00 Using spectroscopic information for magnetometry and magnetic microscopy obviously requires detailed theoretical understanding of spectral shape and magnitude of dichroism signals. A research team at ALS Beamline 4.0.2 has now shown unambiguously that, contrary to common belief, spectral shape and magnitude of x-ray magnetic linear dichroism (XMLD) are not only determined by the relative orientation of magnetic moments and x-ray polarization, but their orientation relative to the crystallographic axes must be taken into account for accurate interpretation of XMLD data. Magnetism and X Rays

335

Magnetic Materials  

Science Conference Proceedings (OSTI)

Oct 27, 2009 ... Extreme magnetic fields (>2 tesla), especially when combined with temperature, are being shown to revolutionize materials processing and ...

336

Makeup and uses of a basic magnet laboratory for characterizing high-temperature permanent magnets  

DOE Green Energy (OSTI)

A set of instrumentation for making basic magnetic measurements was assembled in order to characterize high-intrinsic-coercivity, rare-earth permanent magnets with respect to short-term demagnetization resistance and long-term aging at temperatures up to 300{degrees}C. The major specialized components of this set consist of a 13-T-peak-field, capacitor-discharge pulse magnetizer; a 10-in.-pole-size, variable-gap electromagnet; a temperature-controlled oven equipped with iron-cobalt pole piece extensions and a removable paddle that carries the magnetization and field sensing coils; associated electronic integrators; and standards for field intensity H and magnetic moment M calibration. A 1-cm cubic magnet sample, carried by the paddle, fits snugly between the pole piece extensions within the electrically heated aluminum oven, where fields up to 3.2 T can be applied by the electromagnet at temperatures up to 300{degrees}C. A sample set of demagnetization data for the high-energy Sm{sub 2}Co{sub 17} type of magnet is given for temperatures up to 300{degrees}C. These data are reduced to the temperature dependence of the M-H knee field and of the field for a given magnetic induction swing, and they are then interpreted to show the limits of safe magnet operation.

Niedra, J.M. [Sverdrup Technology, Inc., Brook Park, OH (United States). Lewis Research Center Group; Schwarze, G.E. [National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center

1994-09-01T23:59:59.000Z

337

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

338

Southern Ocean Climate and Sea Ice Anomalies Associated with the Southern Oscillation  

Science Conference Proceedings (OSTI)

The anomalies in the climate and sea ice cover of the Southern Ocean and their relationships with the Southern Oscillation (SO) are investigated using a 17-yr dataset from 1982 to 1998. The polar climate anomalies are correlated with the Southern ...

R. Kwok; J. C. Comiso

2002-03-01T23:59:59.000Z

339

Simple, state-based approaches to program-based anomaly detection  

Science Conference Proceedings (OSTI)

This article describes variants of two state-based intrusion detection algorithms from Michael and Ghosh [2000] and Ghosh et al. [2000], and gives experimental results on their performance. The algorithms detect anomalies in execution audit data. One ... Keywords: Anomaly detection, finite automata, information system security, intrusion detection, machine learning

C. C. Michael; Anup Ghosh

2002-08-01T23:59:59.000Z

340

Liquid polymorphism and density anomaly in a three-dimensional associating lattice gas  

E-Print Network (OSTI)

Liquid polymorphism and density anomaly in a three-dimensional associating lattice gas Mauricio-dimensional associating lattice gas (ALG) model. This model combines orientational ice-like interactions and "van der the presence of two liquid phase, two critical points and density anomaly. PACS numbers: 1 #12;I. INTRODUCTION

Barbosa, Marcia C. B.

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Geochemical anomalies in soil and sandstone overlying the Phoenix uranium deposit, Athabasca Basin Natural Resources  

E-Print Network (OSTI)

Collaboration Introduction The Wheeler River Property, host of Denison Mine's Phoenix uranium depositCo Mo Ni UU Geochemical anomalies in soil and sandstone overlying the Phoenix uranium deposit is the most efficient analytical method to detect these anomalies. Athabasca Basin Figure 1: Denison Mine

342

Gravity anomalies of the Northern Hawaiian Islands: Implications on the shield evolutions of Kauai and Niihau  

E-Print Network (OSTI)

Gravity anomalies of the Northern Hawaiian Islands: Implications on the shield evolutions of Kauai January 2010; accepted 16 March 2010; published 31 August 2010. [1] New land and marine gravity data reveal two positive residual gravity anomalies in the Northern Hawaiian Islands: one over Kaua

Ito, Garrett

343

Anomaly detection in extremist web forums using a dynamical systems approach  

Science Conference Proceedings (OSTI)

In this paper, we present preliminary results of analyzing data from the Dark Web collection using a dynamical systems approach for unsupervised anomaly detection. The goal is to provide a robust, focus-of-attention mechanism to identify emerging threats ... Keywords: data mining, dynamical systems, finite-time Lyapunov exponents, unsupervised anomaly detection

Steve Kramer

2010-07-01T23:59:59.000Z

344

Anomaly detection via feature-aided tracking and hidden Markov models  

Science Conference Proceedings (OSTI)

The problem of detecting an anomaly (or abnormal event) is such that the distribution of observations is different before and after an unknown onset time, and the objective is to detect the change by statistically matching the observed pattern with that ... Keywords: anomaly detection, asymmetric threats, change detection, hidden Markov models

Satnam Singh; Haiying Tu; William Donat; Krishna Pattipati; Peter Willett

2009-01-01T23:59:59.000Z

345

M-AID: An adaptive middleware built upon anomaly detectors for intrusion detection and rational response  

Science Conference Proceedings (OSTI)

Anomaly-based intrusion detection is about the discrimination of malicious and legitimate behaviors on the basis of the characterization of system normality in terms of particular observable subjects. As the system normality is constructed solely from ... Keywords: Anomaly detection, POMDP, intrusion detection, network security, security metrics, security policy

Zonghua Zhang; Hong Shen

2009-11-01T23:59:59.000Z

346

Weighting versus pruning in rule validation for detecting network and host anomalies  

Science Conference Proceedings (OSTI)

For intrusion detection, the LERAD algorithm learns a succinct set of comprehensible rules for detecting anomalies, which could be novel attacks. LERAD validates the learned rules on a separate held-out validation set and removes rules that cause ... Keywords: anomaly detection, machine learning, rule pruning, rule weighting

Gaurav Tandon; Philip K. Chan

2007-08-01T23:59:59.000Z

347

Anomaly detection in wireless sensor networks using self-organizing map and wavelets  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks (WSNs) have been applied in agriculture monitoring to monitor and collect various physical attributes within a specific area. It is important to detect data anomalies to determine a suitable course of action. The underlying aim ... Keywords: agriculture monitoring, anomaly detection, discrete wavelet transform, self-organizing map, wavelets, wireless sensor networks

Supakit Siripanadorn; Wipawee Hattagam; Neung Teaumroong

2010-10-01T23:59:59.000Z

348

Solar Flare Intermittency and the Earth's Temperature Anomalies Nicola Scafetta1,2  

E-Print Network (OSTI)

Solar Flare Intermittency and the Earth's Temperature Anomalies Nicola Scafetta1,2 and Bruce J; published 17 June 2003) We argue that Earth's short-term temperature anomalies and the solar flare data sets that corresponds to the one that would be induced by the solar flare intermittency. The mean

Scafetta, Nicola

349

DADICC: Intelligent system for anomaly detection in a combined cycle gas turbine plant  

Science Conference Proceedings (OSTI)

DADICC is the abbreviated name for an intelligent system able to detect on-line and diagnose anomalies as soon as possible in the dynamic evolution of the behaviour of a power plant based on a combined cycle gas turbine. In order to reach this objective, ... Keywords: Anomaly detection, Diagnosis, Expert system, Multi-agent system, Neural network, Normal behaviour

Antonio Arranz; Alberto Cruz; Miguel A. Sanz-Bobi; Pablo Ruíz; Josué Coutiño

2008-05-01T23:59:59.000Z

350

One class classification for anomaly detection: support vector data description revisited  

Science Conference Proceedings (OSTI)

The Support Vector Data Description (SVDD) has been introduced to address the problem of anomaly (or outlier) detection. It essentially fits the smallest possible sphere around the given data points, allowing some points to be excluded as outliers. Whether ... Keywords: anomaly detection, minimal sphere fitting, one class classification, outlier detection, support vector data description

Eric J. Pauwels; Onkar Ambekar

2011-08-01T23:59:59.000Z

351

Statistical relationships between the surface air temperature anomalies and the solar and geomagnetic activity indices  

E-Print Network (OSTI)

Statistical analysis of the data series from 1856 to 2000 for the annual global and hemispheric surface air temperature anomalies is completed. Statistically significant correlations are found between global and hemispheric temperature anomalies and solar and geomagnetic indices. The temperature anomalies in the Northern and Southern hemispheres show similar statistical relations with the solar and geomagnetic indices. The cross-correlation analysis shows no statistically significant global temperature lag behind the sunspots as well as behind aa-indices. The correlation between the temperature anomalies and the geomagnetic indices is about two times higher than the correlation between the temperature anomalies and the solar indices. These results support the suggestion that the geomagnetic forcing predominates over the solar activity forcing on the global and hemispheric surface air temperatures.

Valev, Dimitar

2010-01-01T23:59:59.000Z

352

A 3D Magnetic Structure Of Izu-Oshima Volcano And Their Changes After The  

Open Energy Info (EERE)

Magnetic Structure Of Izu-Oshima Volcano And Their Changes After The Magnetic Structure Of Izu-Oshima Volcano And Their Changes After The Eruption In 1986 As Estimated From Repeated Airborne Magnetic Surveys Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A 3D Magnetic Structure Of Izu-Oshima Volcano And Their Changes After The Eruption In 1986 As Estimated From Repeated Airborne Magnetic Surveys Details Activities (0) Areas (0) Regions (0) Abstract: A 3D magnetic inversion method using a conjugate gradient method (CG method) was developed for constructing 3D magnetization models of a volcanic edifice and applied to aeromagnetic anomalies of Izu-Oshima Volcano surveyed in 1986 and in 1997. The calculated results of the 1986 data show that the volcanic edifice of Izu-Oshima Volcano has a mean magnetization intensity ranging from 10.4 to 12.1 A/m. The derived 3D

353

Correcting transport errors during advection of aerosol and cloud moment sequences in eulerian models  

SciTech Connect

Moment methods are finding increasing usage for simulations of particle population balance in box models and in more complex flows including two-phase flows. These highly efficient methods have nevertheless had little impact to date for multi-moment representation of aerosols and clouds in atmospheric models. There are evidently two reasons for this: First, atmospheric models, especially if the goal is to simulate climate, tend to be extremely complex and take many man-years to develop. Thus there is considerable inertia to the implementation of novel approaches. Second, and more fundamental, the nonlinear transport algorithms designed to reduce numerical diffusion during advection of various species (tracers) from cell to cell, in the typically coarse grid arrays of these models, can and occasionally do fail to preserve correlations between the moments. Other correlated tracers such as isotopic abundances, composition of aerosol mixtures, hydrometeor phase, etc., are subject to this same fate. In the case of moments, this loss of correlation can and occasionally does give rise to unphysical moment sets. When this happens the simulation can come to a halt. Following a brief description and review of moment methods, the goal of this paper is to present two new approaches that both test moment sequences for validity and correct them when they fail. The new approaches work on individual grid cells without requiring stored information from previous time-steps or neighboring cells.

McGraw R.

2012-03-01T23:59:59.000Z

354

Superconducting Magnets  

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

Mit Hilfe der Technologie supraleitender Magnete lassen sich in Mit Hilfe der Technologie supraleitender Magnete lassen sich in Ringbeschleunigern höhere Energien erreichen. Weil supraleitende Spulen keinen elektrischen Widerstand aufweisen, können damit stärkere Magnetfelder erzeugt werden. In normal leitenden Elektromagneten wird - wegen des elektrischen Widerstands der Drähte - die Spule aufgeheizt. Auf diese Weise geht sehr viel Energie in Form von Wärme verloren, was die Energiekosten dieser Magnete in die Höhe treibt. Supraleitende Spulen erlauben es, Magnete grosser Feldstärke unter günstigen Bedingungen zu betreiben und damit die Energiekosten zu senken. Durch den Einbau supraleitender Spulen in den Ringbeschleuniger von Fermilab konnte dessen Energie verdoppelt werden.Auch der im Bau befindliche "Large Hadron Collider" am CERN wird supraleitende Magnete

355

Magnetic nanotubes  

DOE Patents (OSTI)

A magnetic nanotube includes bacterial magnetic nanocrystals contacted onto a nanotube which absorbs the nanocrystals. The nanocrystals are contacted on at least one surface of the nanotube. A method of fabricating a magnetic nanotube includes synthesizing the bacterial magnetic nanocrystals, which have an outer layer of proteins. A nanotube provided is capable of absorbing the nanocrystals and contacting the nanotube with the nanocrystals. The nanotube is preferably a peptide bolaamphiphile. A nanotube solution and a nanocrystal solution including a buffer and a concentration of nanocrystals are mixed. The concentration of nanocrystals is optimized, resulting in a nanocrystal to nanotube ratio for which bacterial magnetic nanocrystals are immobilized on at least one surface of the nanotubes. The ratio controls whether the nanocrystals bind only to the interior or to the exterior surfaces of the nanotubes. Uses include cell manipulation and separation, biological assay, enzyme recovery, and biosensors.

Matsui, Hiroshi (Glen Rock, NJ); Matsunaga, Tadashi (Tokyo, JP)

2010-11-16T23:59:59.000Z

356

Atomic structure and magnetic properties of Fe1-xCox alloys  

SciTech Connect

Using genetic algorithm with first-principle calculations, we searched for low-energy crystal structures of Fe1?xCox alloys. We found that Fe1?xCox alloys are highly configurationally degenerate with many additional off-stoichiometric stable structures to the well-known B2 structure. The average magnetic moment of Fe atom increases with concentration of Co in the alloy, while that of Co atom is almost constant, which are consistent with experiments and earlier studies. The magnetic moment of Fe atom is strongly dependent on the number of Co nearest neighbor and it increases with this number.

Nguyen, Manh Cuong; Zhao, Xin; Ji, Min; Wang, Cai-Zhuang; Harmon, Bruce; Ho, Kai-Ming

2012-03-09T23:59:59.000Z

357

Possible Causes of Anomalies in Seasonal Mean Circulation Patterns during the 1982–83 El Niño Event  

Science Conference Proceedings (OSTI)

For six consecutive seasons around the 1982–83 El Niño event the relation between observed anomalies in atmospheric circulation patterns and anomalies in various forcing mechanisms is diagnosed. A linear model is used in an attempt to simulate ...

C. J. Kok; J. D. Opsteegh

1985-04-01T23:59:59.000Z

358

Impact of Vegetation Feedback on the Response of Precipitation to Antecedent Soil Moisture Anomalies over North America  

Science Conference Proceedings (OSTI)

Previous studies support a positive soil moisture–precipitation feedback over a major fraction of North America; that is, initial soil moisture anomalies lead to precipitation anomalies of the same sign. To investigate how vegetation feedback ...

Yeonjoo Kim; Guiling Wang

2007-06-01T23:59:59.000Z

359

Estimation of Subsurface Temperature Anomaly in the North Atlantic Using a Self-Organizing Map Neural Network  

Science Conference Proceedings (OSTI)

A self-organizing map (SOM) neural network was developed from Argo gridded datasets in order to estimate a subsurface temperature anomaly (STA) from remote sensing data. The SOM maps were trained using anomalies of sea surface temperature (SST), ...

Xiangbai Wu; Xiao-Hai Yan; Young-Heon Jo; W. Timothy Liu

2012-11-01T23:59:59.000Z

360

Nuclear Magnetic Resonance Laboratory  

Science Conference Proceedings (OSTI)

Nuclear Magnetic Resonance Laboratory. ... A 600 MHz Nuclear Magnetic Resonance Spectrometer. Analytical Data Compilation Reference Materials. ...

2012-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

A Fuzzy Logic Method for Improved Moment Estimation from Doppler Spectra  

Science Conference Proceedings (OSTI)

A new method for estimating moments from wind measurement devices that measure Doppler spectra as a function of range is presented. Quite often the spectra are contaminated by a wide variety of sources, including (but not limited to) birds, ...

Larry B. Cornman; Robert K. Goodrich; Corinne S. Morse; Warner L. Ecklund

1998-12-01T23:59:59.000Z

362

Comparative Analysis of Four Second-Moment Turbulence Closure Models for the Oceanic Mixed Layer  

Science Conference Proceedings (OSTI)

In this comparative study, four different algebraic second-moment turbulence closure models are investigated in detail. These closure schemes differ in the number of terms considered for the closure of the pressure–strain correlations. These four ...

Hans Burchard; Karsten Bolding

2001-08-01T23:59:59.000Z

363

Similarity Scales and Universal Profiles of Statistical Moments in the Convective Boundary Layer  

Science Conference Proceedings (OSTI)

The parameterization of the mixed layer based on a decomposition of statistical moments into nonpenetrative and residual components and on their local similarity is discussed. The method is examined by using laboratory data for nonpenetrative ...

Zbigniew Sorbjan

1990-08-01T23:59:59.000Z

364

MOMENT FORMULAE FOR GENERAL POINT PROCESSES L. DECREUSEFOND AND I. FLINT  

E-Print Network (OSTI)

MOMENT FORMULAE FOR GENERAL POINT PROCESSES L. DECREUSEFOND AND I. FLINT Abstract. The goal, Malliavin calculus. 1 hal-00753801,version1-19Nov2012 #12;2 L. DECREUSEFOND AND I. FLINT also obtain

Paris-Sud XI, Université de

365

Optimal Thresholds for the Estimation of Area Rain-Rate Moments by the Threshold Method  

Science Conference Proceedings (OSTI)

Optimization of the threshold method, achieved by determination of the threshold that maximizes the correlation between an area-average rain-rate moment and the area coverage of rain rates exceeding the threshold, is demonstrated empirically and ...

David A. Short; Kunio Shimizu; Benjamin Kedem

1993-02-01T23:59:59.000Z

366

Characterizing the Variability and Extremes of the Stratospheric Polar Vortices Using 2D Moment Analysis  

Science Conference Proceedings (OSTI)

The mean state, variability, and extreme variability of the stratospheric polar vortices, with an emphasis on the Northern Hemisphere (NH) vortex, are examined using two-dimensional moment analysis and extreme value theory (EVT). The use of ...

Daniel M. Mitchell; Andrew J. Charlton-Perez; Lesley J. Gray

2011-06-01T23:59:59.000Z

367

The Bias in Moment Estimators for Parameters of Drop Size Distribution Functions: Sampling from Exponential Distributions  

Science Conference Proceedings (OSTI)

The moment estimators frequently used to estimate parameters for drop size distribution (DSD) functions being “fitted” to observed raindrop size distributions are biased. Consequently, the fitted functions often do not represent well either the ...

Paul L. Smith; Donna V. Kliche

2005-08-01T23:59:59.000Z

368

Regional Precipitation Quantile Values for the Continental United States Computed from L-Moments  

Science Conference Proceedings (OSTI)

Precipitation quantile values have been computed for 9 probabilities, 8 durations, 12 starting months, and 1 1 1 regions across the United States. L-moment methodology has been used for the calculations. Discussed are the rationale for selecting ...

Nathaniel B. Guttman; J. R. M. Hosking; James R. Wallis

1993-12-01T23:59:59.000Z

369

SCADA Protocol Anomaly Detection Utilizing Compression (SPADUC) 2013  

SciTech Connect

There is a significant need to protect the nation’s energy infrastructures from malicious actors using cyber methods. Supervisory, Control, and Data Acquisition (SCADA) systems may be vulnerable due to the insufficient security implemented during the design and deployment of these control systems. This is particularly true in older legacy SCADA systems that are still commonly in use. The purpose of INL’s research on the SCADA Protocol Anomaly Detection Utilizing Compression (SPADUC) project was to determine if and how data compression techniques could be used to identify and protect SCADA systems from cyber attacks. Initially, the concept was centered on how to train a compression algorithm to recognize normal control system traffic versus hostile network traffic. Because large portions of the TCP/IP message traffic (called packets) are repetitive, the concept of using compression techniques to differentiate “non-normal” traffic was proposed. In this manner, malicious SCADA traffic could be identified at the packet level prior to completing its payload. Previous research has shown that SCADA network traffic has traits desirable for compression analysis. This work investigated three different approaches to identify malicious SCADA network traffic using compression techniques. The preliminary analyses and results presented herein are clearly able to differentiate normal from malicious network traffic at the packet level at a very high confidence level for the conditions tested. Additionally, the master dictionary approach used in this research appears to initially provide a meaningful way to categorize and compare packets within a communication channel.

Gordon Rueff; Lyle Roybal; Denis Vollmer

2013-01-01T23:59:59.000Z

370

Learning About Magnets!  

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

the the National High Magnetic Field Laboratory Learning About Name A magnet is a material or object that creates a magnetic fi eld. This fi eld is invisible, but it creates a force that can "attract" or "repel" other magnets and magnetic materials, like iron or nickel. What is a Magnet? This bar magnet is a permanent magnet. Permanent magnets can be found in the Earth as rocks and metals. Magnets have

371

Distinct local electronic structure and magnetism for Mn in amorphous Si and Ge  

SciTech Connect

Transition metals such as Mn generally have large local moments in covalent semiconductors due to their partially filled d shells. However, Mn magnetization in group-IV semiconductors is more complicated than often recognized. Here we report a striking crossover from a quenched Mn moment (<0.1 {mu}{sub B}) in amorphous Si (a-Si) to a large distinct local Mn moment ({ge}3{mu}{sub B}) in amorphous Ge (a-Ge) over a wide range of Mn concentrations (0.005-0.20). Corresponding differences are observed in d-shell electronic structure and the sign of the Hall effect. Density-functional-theory calculations show distinct local structures, consistent with different atomic density measured for a-Si and a-Ge, respectively, and the Mn coordination number N{sub c} is found to be the key factor. Despite the amorphous structure, Mn in a-Si is in a relatively well-defined high coordination interstitial type site with broadened d bands, low moment, and electron (n-type) carriers, while Mn in a-Ge is in a low coordination substitutional type site with large local moment and holes (p-type) carriers. Moreover, the correlation between N{sub c} and the magnitude of the local moment is essentially independent of the matrix; the local Mn moments approach zero when N{sub c} > 7 for both a-Si and a-Ge.

Zeng, Li; Cao, J. X.; Helgren, E.; Karel, J.; Arenholz, E.; Ouyang, Lu; Smith, David J.; Wu, R. Q.; Hellman, F.

2010-06-01T23:59:59.000Z

372

Out-of-Equilibrium Chiral Magnetic Effect at Strong Coupling  

E-Print Network (OSTI)

We study the charge transports originating from triangle anomaly in out-of-equilibrium conditions in the framework of AdS/CFT correspondence at strong coupling, to gain useful insights on possible charge separation effects that may happen in the very early stages of heavy-ion collisions. We first construct a gravity background of a homogeneous mass shell with a finite (axial) charge density gravitationally collapsing to a charged blackhole, which serves as a dual model for out-of-equilibrium charged plasma undergoing thermalization. We find that a finite charge density in the plasma slows down the thermalization. We then study the out-of-equilibrium properties of Chiral Magnetic Effect and Chiral Magnetic Wave in this background. As the medium thermalizes, the magnitude of chiral magnetic conductivity and the response time delay grow. We find a dynamical peak in the spectral function of retarded current correlator, which we identify as an out-of-equilibrium chiral magnetic wave. The group velocity of the out-of-equilibrium chiral magnetic wave is shown to receive a dominant contribution from a non-equilibrium effect, making the wave moving much faster than in the equilibrium, which may enhance the charge transports via triangle anomaly in the early stage of heavy-ion collisions.

Shu Lin; Ho-Ung Yee

2013-05-16T23:59:59.000Z

373

Self-energy anomaly of an electric pointlike dipole in three-dimensional static spacetimes  

E-Print Network (OSTI)

We calculate the self-energy anomaly of a pointlike electric dipole located in a static $(2+1)$-dimensional curved spacetime. The energy functional for this problem is invariant under an infinite-dimensional (gauge) group of transformations parameterized by one scalar function of two variables. We demonstrate that the problem of the calculation of the self-energy anomaly for a pointlike dipole can be reduced to the calculation of quantum fluctuations of an effective two-dimensional Euclidean quantum field theory. We reduced the problem in question to the calculation of the conformal anomaly of an effective scalar field in two dimensions and obtained an explicit expression for the self-energy anomaly of an electric dipole in an asymptotically flat, regular $(2+1)$-dimensional spacetime which may have electrically neutral black-hole-like metrics with regular Killing horizon.

Valeri P. Frolov; Andrey A. Shoom; Andrei Zelnikov

2013-03-07T23:59:59.000Z

374

Model Experiments on the Impact of Pacific Sea Surface Temperature Anomalies on Blocking Frequency  

Science Conference Proceedings (OSTI)

Sensitivity experiments with a perpetual January version of a low-resolution general circulation model are conducted to investigate the influence of Pacific sea surface temperature (SST) anomalies on blocking in the Northern Hemisphere. Six 1200-...

Steven L. Mullen

1989-09-01T23:59:59.000Z

375

Maintenance of Circulation Anomalies during the 1988 Drought and 1993 Floods over the United States  

Science Conference Proceedings (OSTI)

The large-scale circulation anomalies associated with the 1988 drought and the 1993 floods are investigated with the National Centers for Environmental Prediction Reanalysis data and a linear stationary wave model. The transient vorticity and ...

Alan Z. Liu; Mingfang Ting; Hailan Wang

1998-09-01T23:59:59.000Z

376

Seasonality of the ENSO-Related Rainfall Variability in Central Chile and Associated Circulation Anomalies  

Science Conference Proceedings (OSTI)

The seasonality of the ENSO–rainfall relationship in central Chile (30°–41°S) and associated circulation anomalies are studied using correlation and compositing techniques. During El Niño episodes there is a tendency for the occurrence of above-...

Aldo Montecinos; Patricio Aceituno

2003-01-01T23:59:59.000Z

377

Modeling the Surface Heat Flux Response to Long-Lived SST Anomalies in the North Atlantic  

Science Conference Proceedings (OSTI)

An atmospheric general circulation model (AGCM), a simplified atmospheric model (SAM) of surface heat flux, and various idealized analytic models have been used to investigate the atmospheric response over the North Atlantic to SST anomalies ...

S. B. Power; R. Kleeman; R. A. Colman; B. J. McAvaney

1995-09-01T23:59:59.000Z

378

Diagnosis of Regional Monthly Anomalies Using the Adjoint Method. Part II: Potential Vorticity  

Science Conference Proceedings (OSTI)

An equivalent barotropic tracer model and its adjoint are used to examine observed central European anomalies of potential vorticity (PV) in terms of advection and diabatic effects. The PV viewpoint yields a similar picture of six January ...

Andrew W. Robertson

1992-06-01T23:59:59.000Z

379

Relationships between Low-Frequency Variability in the Southern Hemisphere and Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

Long-term trends and interannual variations of circulation anomalies in the Southern Hemisphere are examined using the National Centers for Environmental Prediction–National Center for Atmospheric Research reanalysis from 1949 to 1998. The ...

Kingtse C. Mo

2000-10-01T23:59:59.000Z

380

The COLA Global Coupled and Anomaly Coupled Ocean–Atmosphere GCM  

Science Conference Proceedings (OSTI)

The Center for Ocean–Land–Atmosphere Studies (COLA) global coupled and anomaly coupled ocean–atmosphere GCM models are described. The ocean and atmosphere components of these coupled models are identical. The only difference between them is in ...

Ben P. Kirtman; Yun Fan; Edwin K. Schneider

2002-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Role of Multiple-Level Tropospheric Circulations in Forcing ENSO Winter Precipitation Anomalies  

Science Conference Proceedings (OSTI)

Regionally organized winter (DJF) precipitation anomalies over North America are presented in association with cold and warm phases of the El Niño–Southern Oscillation. Variations in low-level flow from moisture sources and in upper-level dynamic ...

Shawn R. Smith; Phaedra M. Green; Alan P. Leonardi; James J. O’Brien

1998-12-01T23:59:59.000Z

382

The Impact of Sea Surface Temperature Anomalies on the Rainfall over Northeast Brazil  

Science Conference Proceedings (OSTI)

The response of the tropical atmosphere to the sea surface temperature (SST) anomalies in the Northern Hemisphere spring of 1984 is investigated. The methodology for investigation consists of comparing simulations with and without the global ...

Carlos R. Mechoso; Steven W. Lyons; Joseph A. Spahr

1990-08-01T23:59:59.000Z

383

Atmospheric Circulation Anomalies during Episodes of Enhanced and Reduced Convective Cloudiness over Uruguay  

Science Conference Proceedings (OSTI)

Regional and large-scale circulation anomalies associated with periods of enhanced and reduced convective cloudiness over Uruguay are studied for austral spring and summer, when rainfall associated with deep convection is more frequent in this ...

Alvaro DÍaz; Patricio Aceituno

2003-10-01T23:59:59.000Z

384

Dynamics of the Extratropical Response to a Tropical Atlantic SST Anomaly  

Science Conference Proceedings (OSTI)

Previous atmospheric general circulation model (AGCM) experiments revealed that atmospheric responses to a tropical Atlantic sea surface temperature anomaly (SSTA) were asymmetric with respect to the sign of the SSTA. A positive SSTA produced a ...

Shuanglin Li; Walter A. Robinson; Martin P. Hoerling; Klaus M. Weickmann

2007-02-01T23:59:59.000Z

385

Improving SST Anomaly Simulations in a Layer Ocean Model with an Embedded Entrainment Temperature Submodel  

Science Conference Proceedings (OSTI)

In this study, an improved sea surface temperature (SST) anomaly (SSTA) solution for the tropical Pacific is presented by explicitly embedding into a layer ocean general circulation model (OGCM) a separate SSTA submodel with an empirical ...

Rong-Hua Zhang; Antonio J. Busalacchi; Raghuram G. Murtugudde

2006-09-01T23:59:59.000Z

386

Genesis of Indian Ocean Mixed Layer Temperature Anomalies: A Heat Budget Analysis  

Science Conference Proceedings (OSTI)

The genesis of mixed layer temperature anomalies across the Indian Ocean are analyzed in terms of the underlying heat budget components. Observational data, for which a seasonal budget can be computed, and a climate model output, which provides ...

Agus Santoso; Alexander Sen Gupta; Matthew H. England

2010-10-01T23:59:59.000Z

387

Atmospheric Precipitation in Response to Equatorial and Tropical Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

Three sets of numerical experiments based on a GFDL GCM were developed to investigate the response of the large-scale tropical circulation and precipitation to the tropical and equatorial sea surface temperature (SST) anomalies. Specified SST ...

Guoxiong Wu; Huanzhu Liu

1992-12-01T23:59:59.000Z

388

A String Function for Describing the Propagation of Baroclinic Anomalies in the Ocean  

Science Conference Proceedings (OSTI)

The authors derive a string function that describes the propagation of large-scale, potentially large amplitude, baroclinic energy anomalies in a two-layer ocean with variable topography and rotation parameter. The generality of the two-layer ...

Robert H. Tyler; Rolf Käse

2001-03-01T23:59:59.000Z

389

Warming Break Trends and Fractional Integration in the Northern, Southern, and Global Temperature Anomaly Series  

Science Conference Proceedings (OSTI)

This paper deals with the estimation of time trends in temperature anomaly series. However, instead of imposing that the estimated residuals from the time trends are covariance stationary processes with spectral density that is positive and ...

Luis A. Gil-Alana

2008-04-01T23:59:59.000Z

390

Forecasting Northern Hemisphere 700-mb Geopotential Height Anomalies Using Empirical Normal Modes  

Science Conference Proceedings (OSTI)

Multivariate linear prediction based on single-lag inverse modeling is developed further and critically examined. The method is applied to the National Meteorological Center analyses of Northern Hemisphere 700-mb geopotential height anomalies, ...

Cécile Penland; Michael Ghil

1993-08-01T23:59:59.000Z

391

Formation and Evolution of Frontal Rainbands and Geostrophic Potential Vorticity Anomalies  

Science Conference Proceedings (OSTI)

A viscous semigeostrophic model is developed and used to study the formation and evolution of frontal rainbands in association with the dry and moist geostrophic potential vorticity (GPV) anomalies. The numerical results show that when moist GPV (...

Qin Xu

1992-04-01T23:59:59.000Z

392

Anomaly detection in noisy and irregular time series: the "turbodiesel charging pressure" case study  

Science Conference Proceedings (OSTI)

In this paper we consider the problem of detecting anomalies in sample series obtained from critical train subsystems. Our study is the analysis of charging pressure in turbodiesel engines powering a fleet of passenger trains. We describe an automated ...

Anahì Balbi; Michael Provost; Armando Tacchella

2010-06-01T23:59:59.000Z

393

Latent and Sensible Heat Flux Anomalies over the Northern Oceans: The Connection to Monthly Atmospheric Circulation  

Science Conference Proceedings (OSTI)

The influence of the atmospheric circulation on monthly anomalies of ocean surface latent and sensible heat fluxes is explored. The fluxes are estimated using bulk formulas applied to a set of about four decades of marine observations over 1946–...

Daniel R. Cayan

1992-04-01T23:59:59.000Z

394

Z' Bosons, the NuTeV Anomaly, and the Higgs Boson Mass  

E-Print Network (OSTI)

NuTeV Anomaly, and the Higgs Boson Mass Michael S. Chanowitzpredicted value of the Higgs boson mass, from ? 60 to ? 120from an increase in the Higgs boson mass. There is a vast

Chanowitz, Michael S

2009-01-01T23:59:59.000Z

395

Hawking radiation via anomaly cancellation for the black holes of five-dimensional minimal gauged supergravity  

E-Print Network (OSTI)

The anomaly cancellation method proposed by Wilczek et al. is applied to the general charged rotating black holes in five-dimensional minimal gauged supergravity. Thus Hawking temperature and fluxes are found. The Hawking ...

Porfyriadis, Achilleas P.

396

Estimation of Tropical Sea Level Anomaly by an Improved Kalman Filter  

Science Conference Proceedings (OSTI)

Kaiman filter theory and autoregressive time series are used to map sea level height anomalies in the tropical Pacific. Our Kalman filters are implemented with a linear state space model consisting of evolution equations for the amplitudes of ...

Ngai Hang Chan; Joseph B. Kadane; Robert N. Miller; Wilfredo Palma

1996-07-01T23:59:59.000Z

397

The Role of the “Atmospheric Bridge” in Linking Tropical Pacific ENSO Events to Extratropical SST Anomalies  

Science Conference Proceedings (OSTI)

The role of the atmospheric circulation as a “bridge” between sea surface temperature (SST) anomalies in the tropical Pacific and those in the midlatitude northern oceans is assessed. The key processes associated with this atmospheric bridge are ...

Ngar-Cheung Lau; Mary Jo Nath

1996-09-01T23:59:59.000Z

398

Steady Linear Response to Thermal Forcing of an Anomaly Model with an Asymmetric Climatology  

Science Conference Proceedings (OSTI)

An anomaly model linearized around the observed winter climatology is used to study the steady response of the atmosphere to diabatic heating. The model is an R7, nine vertical levels, primitive equations, fully spectral model, derived from the ...

A. Navarra

1990-01-01T23:59:59.000Z

399

Do Stationary Waves Drive the Zonal-Mean Jet Anomalies of the Northern Winter?  

Science Conference Proceedings (OSTI)

The role of zonal-mean zonal flow (u) perturbations in generating anomalous stationary waves has been acknowledged since the 1939 study by Rossby and his collaborators. However, the dynamical mechanisms, which in turn produce the u anomalies, are ...

Eric DeWeaver; Sumant Nigam

2000-07-01T23:59:59.000Z

400

Life Cycles of Persistent Anomalies. Part I: Evolution of 500 mb Height Fields  

Science Conference Proceedings (OSTI)

We have conducted observational analysts to identify systematic aspects of the life cycles of persistent anomalies of the extratropical Northern Hemisphere wintertime circulation. In the present study, we focus on the typical characteristics of ...

Randall M. Dole

1989-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Deducing Anomalous Wave Source Regions during the Life Cycles of Persistent Flow Anomalies  

Science Conference Proceedings (OSTI)

Anomalous wave source regions are identified during the life cycles of persistent flow anomalies occurring over the North Pacific and North Atlantic Oceans during boreal winter. These cases project strongly upon the Pacific–North American and ...

Robert X. Black

1997-04-01T23:59:59.000Z

402

Circulation Regimes of Rainfall Anomalies in the African-South Asian Monsoon Belt  

Science Conference Proceedings (OSTI)

This study explores the spatial differentiation of climate anomalies and associated circulation mechanisms across the African-South Asian monsoon belt through empirical analyses mainly for the period 1948–83. Observations include surface ship ...

Uma S. Bhatt

1989-10-01T23:59:59.000Z

403

Impact of Common Sea Surface Temperature Anomalies on Global Drought and Pluvial Frequency  

Science Conference Proceedings (OSTI)

Climate model simulations run as part of the Climate Variability and Predictability (CLIVAR) Drought Working Group initiative were analyzed to determine the impact of three patterns of sea surface temperature (SST) anomalies on drought and ...

Kirsten L. Findell; Thomas L. Delworth

2010-02-01T23:59:59.000Z

404

Scaling Analysis of the Sea Surface Temperature Anomaly in the South China Sea  

Science Conference Proceedings (OSTI)

Based on the data of optimum interpolation sea surface temperature (OISST), the temporal correlations of the sea surface temperature anomaly (SSTA) in the South China Sea (SCS) are studied by using the rescaled range analysis (R/S) and detrended ...

Zijun Gan; Youfang Yan; Yiquan Qi

2007-04-01T23:59:59.000Z

405

Meridional and Downward Propagation of Atmospheric Circulation Anomalies. Part II: Southern Hemisphere Cold Season Variability  

Science Conference Proceedings (OSTI)

As in the Northern Hemisphere, there exists a simultaneous poleward propagation of temperature anomalies in the stratosphere and equatorward propagation in the troposphere in the Southern Hemisphere’s cold season. It takes about 110 days for ...

R-C. Ren; Ming Cai

2008-07-01T23:59:59.000Z

406

Classification of 500 mb Height Anomalies Using Obliquely Rotated Principal Components  

Science Conference Proceedings (OSTI)

The objective of this study was to classify 500 mb height anomaly patterns for North America using principal component analysis with oblique rotation. Two versions of the oblique rotation, oblimax and direct oblimin, were applied to two gridded ...

Stewart J. Cohen

1983-12-01T23:59:59.000Z

407

Air-Sea Interaction as a Propagator of Equatorial Ocean Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

The westward propagation of equatorial sea surface temperature anomalies exceeds the surface drift velocity and is probably associated with propagating changes in the depth of the surface mixed layer and upper thermocline. These can be caused by ...

Eric B. Kraus; Howard P. Hanson

1983-01-01T23:59:59.000Z

408

Seasonality in the Local and Remote Atmospheric Response to Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

Two apparently contradictory situations are provided by observations of the atmospheric response to sea surface temperature anomalies. These are: (i) The extratropical regions of the winter hemisphere appear to possess strong teleconnections with ...

Peter J. Webster

1982-01-01T23:59:59.000Z

409

Physics and Dynamics of Density-Compensated Temperature and Salinity Anomalies. Part I: Theory  

Science Conference Proceedings (OSTI)

Subducted temperature anomalies have been invoked as a possible way for midlatitudes to alter the climate variability of equatorial regions through the so-called thermocline bridge, both in the Pacific and Atlantic Oceans. To have a significant ...

Rémi Tailleux; Alban Lazar; C. J. C. Reason

2005-05-01T23:59:59.000Z

410

Sensitivity of the Systematic Error of Extended Range Forecasts to Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

The sensitivity of the systematic error of extended-range forecasts to sea surface temperature (SST) anomalies is investigated. General circulation model (GCM) experiments were performed to quantify error patterns for warm, normal, and cold SST ...

Kingtse C. Mo; X. L. Wang

1995-06-01T23:59:59.000Z

411

Electric and magnetic response to the continuum for A=7 isobars in a dicluster model  

E-Print Network (OSTI)

Mirror isobars $^7$Li and $^7$Be are investigated in a dicluster model. The magnetic dipole moments and the magnetic dipole response to the continuum are calculated in this framework. The magnetic contribution is found to be small with respect to electric dipole and quadrupole excitations even at astrophysical energies, at a variance with the case of deuteron. Energy weighted molecular sum rules are evaluated and a formula for the molecular magnetic dipole sum rule is found which matches the numerical calculations. Cross-sections for photo-dissociation and radiative capture as well as the S-factor for reactions of astrophysical significance are calculated with good agreement with known experimental data.

A. Mason; R. Chatterjee; L. Fortunato; A. Vitturi

2008-06-25T23:59:59.000Z

412

Probing Spin Liquids with a New Pulsed-Magnet System | Advanced Photon  

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

a Magnetic Moment in a Split Picosecond a Magnetic Moment in a Split Picosecond Unpeeling Atoms and Molecules from the Inside Out Butterfly Wing Yields Clues to Light-Altering Structures Squeezing Information from Materials under Extreme Pressure Quick-Change Molecules Caught in the Act Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Probing Spin Liquids with a New Pulsed-Magnet System AUGUST 26, 2010 Bookmark and Share The (008) intensity color map on a θ vs. 2θ mesh. With increasing magnetic field the peak splits at a critical field of H ~29 T, which is a hallmark of a structural phase transition with a reduction from cubic to tetragonal or orthorhombic symmetry. Above the critical field,

413

Structural and magnetic properties of MBE grown GeMnN2 thin films  

Science Conference Proceedings (OSTI)

Epitaxial GeMnN{sub 2} thin films are synthesized by plasma-assisted molecular beam epitaxy. Transmission electron microscopy and x-ray diffraction measurements confirm that it is the orthorhombic variant, consistent with the predictions of first-principles calculations. The magnetic properties of the films are related to defects, with samples grown under Ge-rich conditions exhibiting a net magnetic moment above room temperature. These results are explained by first-principles calculations, indicating that the preferential substitution of one magnetic sublattice of GeMnN{sub 2} by impurities and/or intrinsic defects such as Ge antisites produces a net magnetic moment in an antiferromagnetic background, and also introduces spin-polarized carriers near the Fermi level.

Liu, Y [University of Wisconsin, Milwaukee; Lazarov, V. K. [University of Wisconsin, Milwaukee; Cheung, S.H. [University of Wisconsin, Milwaukee; Keavney, D.J. [Argonne National Laboratory (ANL); Gai, Zheng [ORNL; Gajdardziska-Josifovska, M [University of Wisconsin, Milwaukee; Weinert, M [University of Wisconsin, Milwaukee; Li, Lian [University of Wisconsin, Milwaukee

2012-01-01T23:59:59.000Z

414

Magnetically active vacancy related defects in irradiated GaN layers  

Science Conference Proceedings (OSTI)

We present the studies of magnetic properties of 2 MeV {sup 4}He{sup +}-irraadiated GaN grown by metal-organic chemical-vapor deposition. Particle irradiation allowed controllable introduction of Ga-vacancy in the samples. The magnetic moments with concentrations changing between 4.3 and 8.3 Multiplication-Sign 10{sup 17}cm{sup -3} showing superparamagnetic blocking at room temperature are observed. The appearance of clear hysteresis curve at T=5K with coercive field of about H{sub C} Almost-Equal-To 270 Oe suggests that the formation of more complex Ga vacancy related defects is promoted with increasing Ga vacancy content. The small concentration of the observed magnetically active defects with respect to the total Ga-vacancy concentration suggests that the presence of the oxygen/hydrogen-related vacancy complexes is the source of the observed magnetic moments.

Kilanski, L.; Tuomisto, F. [Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076 Aalto Espoo (Finland); Szymczak, R. [Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw (Poland); Kruszka, R. [Institute of Electron Technology, Al. Lotnikow 46, 02-668 Warsaw (Poland)

2012-08-13T23:59:59.000Z

415

Addressing the Challenges of Anomaly Detection for Cyber Physical Energy Grid Systems  

Science Conference Proceedings (OSTI)

The consolidation of cyber communications networks and physical control systems within the energy smart grid introduces a number of new risks. Unfortunately, these risks are largely unknown and poorly understood, yet include very high impact losses from attack and component failures. One important aspect of risk management is the detection of anomalies and changes. However, anomaly detection within cyber security remains a difficult, open problem, with special challenges in dealing with false alert rates and heterogeneous data. Furthermore, the integration of cyber and physical dynamics is often intractable. And, because of their broad scope, energy grid cyber-physical systems must be analyzed at multiple scales, from individual components, up to network level dynamics. We describe an improved approach to anomaly detection that combines three important aspects. First, system dynamics are modeled using a reduced order model for greater computational tractability. Second, a probabilistic and principled approach to anomaly detection is adopted that allows for regulation of false alerts and comparison of anomalies across heterogeneous data sources. Third, a hierarchy of aggregations are constructed to support interactive and automated analyses of anomalies at multiple scales.

Ferragut, Erik M [ORNL; Laska, Jason A [ORNL; Melin, Alexander M [ORNL; Czejdo, Bogdan [ORNL

2013-01-01T23:59:59.000Z

416

SUPERCONDUCTING MAGNETIC ENERGY STORAGE  

E-Print Network (OSTI)

Scale Superconducting Magnetic Energy Storage Plant", IEEEfor SlIperconducting Magnetic Energy Storage Unit", inSuperconducting Magnetic Energy Storage Plant, Advances in

Hassenzahl, W.

2011-01-01T23:59:59.000Z

417

Magnetization Characterization Laboratory  

Science Conference Proceedings (OSTI)

... use of magnetic materials for motors, generators, transformers ... all depend on the specific magnetic characteristics of ... For example, a magnet used in ...

2012-10-23T23:59:59.000Z

418

A nuclear magnetic resonance probe of Fe-Al and Al20V2Eu intermetallics  

E-Print Network (OSTI)

Al-rich Fe-Al systems (FeAl2, Fe2 Al5 and Fe4Al13) and Al20V2Eu have complicated structures with quasicrystal-like features making these materials potentially of interest for magnetic behavior. However, there is not much work on these materials. To study the variety of magnetic properties, we use NMR, magnetic susceptibility, specific heat and other methods in this work. The microscopic electronic and magnetic properties of the Al-rich Fe-Al system and Al20V2Eu have been studied via 27Al NMR at temperatures between 4 and 500 K. The results of spin lattice relaxation rates reveal a pseudogap in Fe4Al13 and Fe2Al5 around the Fermi-level in the density of states. Besides, a square well gap with a width of 2 meV and center at Fermi energy was detected by specific heat measurements in Fe2Al5. Both Fe4 Al13 and Fe2Al5 are non-magnetic systems with dilute magnetic defects, while FeAl2 is a concentrated local magnetic moment system. In Al20V2Eu, a crossover was observed in NMR, magnetization and transport measurements. Above 40 K, Eu(2+) local magnetic moments dominate; below 40 K, a transition to a Kondo regime is observed, where the Kondo effect leads to the reduction of localized moments due to the formation of a spin-compensated Kondo cloud. With increasing magnetic field, f electrons participate more and more in excitations near the Fermi level and a heavy-Fermion state was observed through specific heat measurements at high magnetic field.

Chi, Ji

2007-08-01T23:59:59.000Z

419

MAGNETIC GRID  

DOE Patents (OSTI)

An electronic grid is designed employing magnetic forces for controlling the passage of charged particles. The grid is particularly applicable to use in gas-filled tubes such as ignitrons. thyratrons, etc., since the magnetic grid action is impartial to the polarity of the charged particles and, accordingly. the sheath effects encountered with electrostatic grids are not present. The grid comprises a conductor having sections spaced apart and extending in substantially opposite directions in the same plane, the ends of the conductor being adapted for connection to a current source.

Post, R.F.

1960-08-01T23:59:59.000Z

420

Deconfinement to quark matter in neutron stars - The influence of strong magnetic fields  

Science Conference Proceedings (OSTI)

We use an extended version of the hadronic SU(3) non-linear realization of the sigma model that also includes quarks to study hybrid stars. Within this approach, the degrees of freedom change naturally as the temperature/density increases. Different prescriptions of charge neutrality, local and global, are tested and the influence of strong magnetic fields and the anomalous magnetic moment on the particle population is discussed.

Dexheimer, V. [UFSC, Florianopolis, Brazil and Gettysburg College, Gettysburg, PA (Brazil); Negreiros, R. [UFF, Niteroi (Brazil) and FIAS - Johann Wolfgang Goethe University, Frankfurt (Germany); Schramm, S. [FIAS - Johann Wolfgang Goethe University, Frankfurt (Germany); Hempel, M. [University of Basel, Basel (Switzerland)

2013-03-25T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Element-specific study of the temperature dependent magnetization of Co-Mn-Sb thin films  

SciTech Connect

Magnetron sputtered thin Co-Mn-Sb films were investigated with respect to their element-specific magnetic properties. Stoichiometric Co{sub 1}Mn{sub 1}Sb{sub 1} crystallized in the C1{sub b} structure has been predicted to be half-metallic and is therefore of interest for spintronics applications. It should show a characteristic antiferromagnetic coupling of the Mn and Co magnetic moments and a transition temperature T{sub C} of about 480K. Although the observed transition temperature of our 20nm thick Co{sub 32.4}Mn{sub 33.7}Sb{sub 33.8}, Co{sub 37.7}Mn{sub 34.1}Sb{sub 28.2} and Co{sub 43.2}Mn{sub 32.6}Sb{sub 24.2} films is in quite good agreement with the expected value, we found a ferromagnetic coupling of the Mn and Co magnetic moments which indicates that the films do not crystallize in the C1{sub b} structure and are probably not fully spin-polarized. The ratio of the Co and Mn moments does not change up to the transition temperature and the temperature dependence of the magnetic moments can be well described by the mean field theory.

Schmalhorst, J.; Ebke, D.; Meinert, M.; Thomas, A.; Reiss, G.; Arenholz, E.

2008-09-30T23:59:59.000Z

422

Vacuum pressures and energy in a strong magnetic field  

E-Print Network (OSTI)

We study vacuum in a strong magnetic field. It shows a nonlinear response, as a ferromagnetic medium. Anisotropic pressures arise, and a negative pressure is exerted in the direction perpendicular to the field. The analogy of this effect with the Casimir effect is analyzed. The vacuum transverse pressure is found to be of the same order of the statistical pressure for $B\\sim10^{15}G$ and $N\\sim10^{33}electrons/cm^{3}$. Vacuum interaction with the field is studied also for $B\\sim10^{16}G$ and larger, including the electron anomalous magnetic moment. We estimate quark contribution to vacuum behavior.

H. Perez Rojas; E. Rodriguez Querts

2004-06-25T23:59:59.000Z

423

Electric dipole moments of Hg, Xe, Rn, Ra, Pu, and TlF induced by the nuclear Schiff moment and limits on time-reversal violating interactions  

E-Print Network (OSTI)

We have calculated the atomic electric dipole moments (EDMs) induced in ^{199}Hg, ^{129}Xe, ^{223}Rn, ^{225}Ra, and ^{239}Pu by their respective nuclear Schiff moments S. The results are (in units 10^{-17}S(e {fm}^{3})^{-1}e cm): d(^{199}Hg)=-2.8, d(^{129}Xe)=0.38, d(^{223}Rn)=3.3, d(^{225}Ra)=-8.5, d(^{239}Pu)=-11. We have also calculated corrections to the parity- and time-invariance-violating (P,T-odd) spin-axis interaction constant in TlF. These results are important for the interpretation of atomic and molecular experiments on EDMs in terms of fundamental P,T-odd parameters.

V. A. Dzuba; V. V. Flambaum; J. S. M. Ginges; M. G. Kozlov

2002-03-21T23:59:59.000Z

424

Questions about Magnets  

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

off just the north (or just the south) end of a magnet? Are magnets stronger than gravity? Hold a magnet in the air. Place a nail against it. The magnet holds the nail up...

425

Probing CP violation with the electric dipole moment of atomic mercury  

E-Print Network (OSTI)

The electric dipole moment of atomic $^{199}$Hg induced by the nuclear Schiff moment and tensor-pseudotensor electron-nucleus interactions has been calculated. For this, we have developed and employed a novel method based on the relativistic coupled-cluster theory. The results of our theoretical calculations combined with the latest experimental result of $^{199}$Hg electric dipole moment, provide new bounds on the T reversal or CP violation parameters $\\theta_{\\rm QCD}$, the tensor-pseudotensor coupling constant $C_T$ and $(\\widetilde{d}_u - \\widetilde{d}_d)$. This is the most accurate calculation of these parameters to date. We highlight the the crucial role of electron correlation effects in their interplay with the P,T violating interactions. Our results demonstrate substantial changes in the results of earlier calculations of these parameters which can be attributed to the more accurate inclusion of important correlation effects in the present work.

K. V. P. Latha; D. Angom; B. P. Das; D. Mukherjee

2009-02-27T23:59:59.000Z

426

Modeling asymmetric beams using higher-order phase-space moments  

Science Conference Proceedings (OSTI)

Shadwick et al. developed [Commun. Nonlinear. Sci. Numer. Simulat. 17, 2153-2160 (2012)] a self-consistent model of beam transport using a phase-space moment description (up to 2nd order) based on the Vlasov-Maxwell Hamiltonian structure. Tzoufras et al. have shown [Physics of Plasmas 16, 056705 (2009)] that for a laser-wakefield-accelerated electron beam, the spatial profile that minimizes the energy spread is a trapezoidal distribution. This profile is spatially asymmetric and thus cannot be described by only using moments less than order three, and so the moment method developed by Shadwick et al. was expanded upon to account for asymmetry by taking the profile to be a sum of two gaussian 'blobs.' It was found that, as long as the electric field across the beam was close to linear, treating the two blobs as separate species was a good approximation.

Lee, Frank M.; Shadwick, B. A. [Department of Physics, University of Texas at Austin, Austin, TX 78712 (United States); Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588 (United States)

2012-12-21T23:59:59.000Z

427

The Astromag Superconducting Magnet Facility Configured for a FreeFlying Satellite  

DOE Green Energy (OSTI)

ASTROMAG is a particle astrophysics facility that was originally configured for the Space Station. The heart of the ASTROMAG facility is a large superconducting magnet which is cooled using superfluid helium. The task of resizing the facility so that it will fly in a satellite in. a high angle of inclination orbit is driven by the launch weight capability of the launch rocket and the desire to be able to do nearly the same physics as the Space Station version of ASTROMAG. In order to reduce the launch weight, the magnet and its cryogenic system had to be downsized, yet the integrated field generated by the magnet in the particle detectors has to match the Space Station version of the magnet. The use of aluminum matrix superconductor and oriented composite materials in the magnet insulation permits one to achieve this goal. The net magnetic dipole moment from the ASTROMAG magnet must be small to minimize the torque due to interaction with the earth's magnetic field. The ASTROMAG magnet consists of identical two coils 1.67 meters apart. The two coils are connected in series in persistent mode. Each coil is designed to carry 2.34 million ampere turns. Both coils are mounted on the same magnetic axis and they operate at opposite polarity. This reduces the dipole moment by a factor of more than 1000. This is tolerable for the Space Station version of the magnet. A magnet operating on a free flying satellite requires additional compensation. This report presents the magnet parameters of a free flying version of ASTROMAG and the parameters of the space cryogenic system for the magnet.

Green, M.A.; Smoot, George F.

1991-06-01T23:59:59.000Z

428

R-parity violating two-loop level rainbowlike contribution to the fermion electric dipole moment  

E-Print Network (OSTI)

We analyze the two-loop level R-parity violating supersymmetric contribution to the electric and chromoelectric dipole moments of the fermion with neutrino and gaugino in the intermediate state. It is found that this contribution can be sufficiently enhanced with large tan {\\beta} and that it can have comparable size with the currently known R-parity violating Barr-Zee type process in the TeV scale supersymmetry breaking. We also give new limits on the R-parity violating couplings from the experimental data of the electric dipole moments of the neutron and the electron.

Nodoka Yamanaka

2012-12-23T23:59:59.000Z

429

All-optical Hall effect by the dynamic toroidal moment in a cavity-based metamaterial  

E-Print Network (OSTI)

Dynamic dipolar toroidal response is demonstrated by an optical plasmonic metamaterial composed of double disks. This response with a hotspot of localized E-field concentration is a well-behaved toroidal cavity mode that exhibits a large Purcell factor due to its deep-subwavelength mode volume. All-optical Hall effect (photovoltaic) due to this optical toroidal moment is demonstrated numerically, in mimicking the magnetoelectric effect in multiferroic systems. The result shows a promising avenue to explore various optical phenomena associated with this intriguing dynamic toroidal moment.

Dong, Zheng-Gao; Yin, Xiaobo; Li, Jiaqi; Lu, Changgui; Zhang, Xiang

2013-01-01T23:59:59.000Z

430

Consumption Moment Risk Factors and Cross-Section of Long-Run Stock Returns  

E-Print Network (OSTI)

We introduce the multifactor asset pricing model that includes as risk factors the …ve Chen et al. (1986) macroeconomic variables along with the rates of change in the …rst four cross-sectional consumption moments. The empirical evidence on the pricing of the economic state variables is sensitive to the experimental design, whereas we …nd strong evidence that with the limited participation of households in the capital markets the aggregate consumption risk (measured by the rate of change in average consumption) and the background risk in consumption (measured jointly by the rates of change in the higher-order consumption moments) are both signi…cantly priced. JEL classi…cation: G12

Andrei Semenov

2011-01-01T23:59:59.000Z

431

Verification of the history-score moment equations for weight-window variance reduction  

Science Conference Proceedings (OSTI)

The history-score moment equations that describe the moments of a Monte Carlo score distribution have been extended to weight-window variance reduction, The resulting equations have been solved deterministically to calculate the population variance of the Monte Carlo score distribution for a single tally, Results for one- and two-dimensional one-group problems are presented that predict the population variances to less than 1% deviation from the Monte Carlo for one-dimensional problems and between 1- 2% for two-dimensional problems,

Solomon, Clell J [Los Alamos National Laboratory; Sood, Avneet [Los Alamos National Laboratory; Booth, Thomas E [Los Alamos National Laboratory; Shultis, J. Kenneth [KANSAS STATE UNIV.

2010-12-06T23:59:59.000Z

432

Electric dipole moments of charged leptons in the split fermion scenario in the two Higgs doublet model  

E-Print Network (OSTI)

We predict the charged lepton electric dipole moments in the split fermion scenario in the framework of the two Higgs doublet model. We observe that the numerical value of the muon (tau) electric dipole moment is at the order of the magnitude of $10^{-22} (e-cm)$ ($10^{-20} (e-cm)$) and there is an enhancement in the case of two extra dimensions, especially for the tau lepton electric dipole moment.

E. O. Iltan

2005-02-28T23:59:59.000Z

433

Improving Cyber-Security of Smart Grid Systems via Anomaly Detection and Linguistic Domain Knowledge  

Science Conference Proceedings (OSTI)

The planned large scale deployment of smart grid network devices will generate a large amount of information exchanged over various types of communication networks. The implementation of these critical systems will require appropriate cyber-security measures. A network anomaly detection solution is considered in this work. In common network architectures multiple communications streams are simultaneously present, making it difficult to build an anomaly detection solution for the entire system. In addition, common anomaly detection algorithms require specification of a sensitivity threshold, which inevitably leads to a tradeoff between false positives and false negatives rates. In order to alleviate these issues, this paper proposes a novel anomaly detection architecture. The designed system applies the previously developed network security cyber-sensor method to individual selected communication streams allowing for learning accurate normal network behavior models. Furthermore, the developed system dynamically adjusts the sensitivity threshold of each anomaly detection algorithm based on domain knowledge about the specific network system. It is proposed to model this domain knowledge using Interval Type-2 Fuzzy Logic rules, which linguistically describe the relationship between various features of the network communication and the possibility of a cyber attack. The proposed method was tested on experimental smart grid system demonstrating enhanced cyber-security.

Ondrej Linda; Todd Vollmer; Milos Manic

2012-08-01T23:59:59.000Z

434

magnets2  

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

II II Painless Physics Articles BEAM COOLING August 2, 1996 By Leila Belkora, Office of Public Affairs ACCELERATION August 16, 1996 By Dave Finley, Accelerator Division Head RF August 30, 1996 By Pat Colestock, Accelerator Division FIXED TARGET PHYSICS September 20, 1996 By Peter H. Garbincius, Physics Section FIXED TARGET PHYSICS PART DEUX October 16, 1996 By Peter H. Garbincius, Physics Section and Leila Belkora, Office of Public Affaris CROSS SECTION November 1, 1996 By Doreen Wackeroth, Theoretical Physics Edited by Leila Belkora, Office of Public Affaris MAGNETS PART I November 15, 1996 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs MAGNETS PART II January 10, 1997 By Hank Glass, Technical Support Section Edited by Donald Sena, Office of Public Affairs

435

Magnetic Reconnection  

SciTech Connect

We review the fundamental physics of magnetic reconnection in laboratory and space plasmas, by discussing results from theory, numerical simulations, observations from space satellites, and the recent results from laboratory plasma experiments. After a brief review of the well-known early work, we discuss representative recent experimental and theoretical work and attempt to interpret the essence of significant modern findings. In the area of local reconnection physics, many significant findings have been made with regard to two- uid physics and are related to the cause of fast reconnection. Profiles of the neutral sheet, Hall currents, and the effects of guide field, collisions, and micro-turbulence are discussed to understand the fundamental processes in a local reconnection layer both in space and laboratory plasmas. While the understanding of the global reconnection dynamics is less developed, notable findings have been made on this issue through detailed documentation of magnetic self-organization phenomena in fusion plasmas. Application of magnetic reconnection physics to astrophysical plasmas is also brie y discussed.

Masaaki Yamada, Russell Kulsrud and Hantao Ji

2009-09-17T23:59:59.000Z

436

A linear Stark shift in dressed atoms as a signal to measure a nuclear anapole moment with a cold atom fountain or interferometer  

E-Print Network (OSTI)

We demonstrate theoretically the existence of a linear dc Stark shift of the individual substates of an alkali atom in its ground state, dressed by a circularly polarized laser field. It arises from the electroweak nuclear anapole moment violating P but not T. It is characterized by the pseudoscalar equal to the mixed product formed with the photon angular momentum and static electric and magnetic fields. We derive the relevant left-right asymmetry with its complete signature in a field configuration selected for a precision measurement with cold atom beams. The 3,3 to 4,3 Cs hyperfine-transition frequency shift amounts to 7 $\\mu$Hz for a laser power of about 1 kW at 877 nm, E=100 kV/cm and B larger than 0.5 G.

Bouchiat, M A

2006-01-01T23:59:59.000Z

437

A linear Stark shift in dressed atoms as a signal to measure a nuclear anapole moment with a cold atom fountain or interferometer  

E-Print Network (OSTI)

We demonstrate theoretically the existence of a linear dc Stark shift of the individual substates of an alkali atom in its ground state, dressed by a circularly polarized laser field. It arises from the electroweak nuclear anapole moment violating P but not T. It is characterized by the pseudoscalar equal to the mixed product formed with the photon angular momentum and static electric and magnetic fields. We derive the relevant left-right asymmetry with its complete signature in a field configuration selected for a precision measurement with cold atom beams. The 3,3 to 4,3 Cs hyperfine-transition frequency shift amounts to 7 $\\mu$Hz for a laser power of about 1 kW at 877 nm, E=100 kV/cm and B larger than 0.5 G.

Marie-Anne Bouchiat

2006-11-03T23:59:59.000Z

438

IN SEARCH FOR THERMAL ANOMALIES IN THE COSO GEOTHERMAL FIELD (CALIFORNIA)  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » IN SEARCH FOR THERMAL ANOMALIES IN THE COSO GEOTHERMAL FIELD (CALIFORNIA) USING REMOTE SENSING AND FIELD DATA Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: IN SEARCH FOR THERMAL ANOMALIES IN THE COSO GEOTHERMAL FIELD (CALIFORNIA) USING REMOTE SENSING AND FIELD DATA Details Activities (2) Areas (1) Regions (0) Abstract: We attempt to identify thermal anomalies using thermal infrared (TIR) data collected over the Coso Geothermal Power Project with the spaceborne ASTER instrument. Our analysis emphasizes corrections for thermal artifacts in the satellite images caused by topography, albedo, and

439

A Shallow Attenuating Anomaly Inside The Ring Fracture Of The Valles  

Open Energy Info (EERE)

Shallow Attenuating Anomaly Inside The Ring Fracture Of The Valles Shallow Attenuating Anomaly Inside The Ring Fracture Of The Valles Caldera, New Mexico Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Shallow Attenuating Anomaly Inside The Ring Fracture Of The Valles Caldera, New Mexico Details Activities (4) Areas (2) Regions (0) Abstract: Spectral ratios of teleseismic direct and scattered P waves observed in the Valles Caldera, New Mexico, show a systematic pattern of low amplitudes at sites inside the caldera relative to sites on or outside the ring fracture. Waveforms recorded at caldera stations are considerably more complex than those recorded outside the caldera. The data used in this study were collected during a passive seismic monitoring experiment conducted in 1987. Twenty-four teleseismic events were recorded on two

440

A quadrature-based third-order moment method for dilute gas-particle flows  

Science Conference Proceedings (OSTI)

Dilute gas-particle flows can be described by a kinetic equation containing terms for spatial transport, gravity, fluid drag, and particle-particle collisions. However, the direct numerical solution of the kinetic equation is intractable for most applications ... Keywords: Boltzmann equation, Gas-particle flows, Kinetic equation, Quadrature method of moments, Velocity distribution function

R. O. Fox

2008-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

ccsd00004205, Calculation of accurate permanent dipole moments of the lowest  

E-Print Network (OSTI)

inhomogeneous external electric #12;elds [18]. Besides, the "`historical"' approach based on photoassociation of molecules with a permanent electric dipole moment (usually labelled as dipolar molecules) using computed the rates for the photoassociation of mixed alkali pairs, and for the susbsequent formation

442

Improvement of the disc harmonic moments descriptor by an exponentially decaying distance transform  

Science Conference Proceedings (OSTI)

The authors propose an improvement of a recent region-based shape descriptor inspired by the 3D spherical harmonics: the Disk Harmonic Moments Descriptor (DHMD). The binary image is weighted by an exponentially decaying distance transform (EDDT) before ... Keywords: content-based image, distance transform, legendre polynomials, region-based shape descriptor, retrieval, salience distance transform, spherical harmonics

Noureddine Ennahnahi; Mohammed Oumsis; Mohammed Meknassi

2010-08-01T23:59:59.000Z

443

Whitening in Range to Improve Weather Radar Spectral Moment Estimates. Part I: Formulation and Simulation  

Science Conference Proceedings (OSTI)

A method for estimation of spectral moments on pulsed weather radars is presented. This scheme operates on oversampled echoes in range; that is, samples of in-phase and quadrature-phase components are collected at a rate several times larger than ...

Sebastián M. Torres; Dušan S. Zrni?

2003-11-01T23:59:59.000Z

444

Analysis of hydraulic tomography using temporal moments of drawdown recovery data  

E-Print Network (OSTI)

and Tian-Chyi J. Yeh Department of Hydrology and Water Resources, University of Arizona, Tucson, Arizona are discussed subsequently. Citation: Zhu, J., and T.-C. J. Yeh (2006), Analysis of hydraulic tomography using temporal moments of drawdown recovery data, Water Resour. Res., 42, W02403, doi:10.1029/2005WR004309. 1

Daniels, Jeffrey J.

445

Modeling Supersaturation and Subgrid-Scale Mixing with Two-Moment Bulk Warm Microphysics  

Science Conference Proceedings (OSTI)

This paper describes further developments of a two-moment warm rain bulk microphysics scheme suitable for addressing the indirect impact of atmospheric aerosols on ice-free clouds in large-eddy simulation (LES) models. The emphasis is on the ...

Hugh Morrison; Wojciech W. Grabowski

2008-03-01T23:59:59.000Z

446

Higher-order quadrature-based moment methods for kinetic equations  

Science Conference Proceedings (OSTI)

Kinetic equations containing terms for spatial transport, body forces, and particle-particle collisions occur in many applications (e.g., rarefied gases, dilute granular gases, fluid-particle flows). The direct numerical solution of the kinetic equation ... Keywords: Boltzmann equation, Dilute particle flows, Kinetic equation, Quadrature method of moments, Rarefied gas flows, Velocity distribution function

R. O. Fox

2009-11-01T23:59:59.000Z

447

A quadrature-based moment method for dilute fluid-particle flows  

Science Conference Proceedings (OSTI)

Gas-particle and other dispersed-phase flows can be described by a kinetic equation containing terms for spatial transport, acceleration, and particle processes (such as evaporation or collisions). In principle, the kinetic description is valid from ... Keywords: Fluid-particle flows, Kinetic equation, Multiphase systems, Number density function, Quadrature method of moments

O. Desjardins; R. O. Fox; P. Villedieu

2008-02-01T23:59:59.000Z

448

PHYSICAL REVIEW C 72, 045503 (2005) Time-reversal-violating Schiff moment of 199  

E-Print Network (OSTI)

in the odd-A Hartree-Fock-Bogoliubov ground state generated by a Skyrme interaction and a weak P- and T the nuclear "Schiff moment" S 0|Sz | 0 , (1) which is the nuclear ground-state expectation value, in the substate | 0 with angular momentum projection MJ equal to the angular momentum J, of the z

Engel, Jonathan

449

IMPLEMENTATION OF A -NQR SYSTEM AT THE NSCL FOR GROUND STATE QUADRUPOLE MOMENT  

E-Print Network (OSTI)

, and provides an important test of nuclear structure models. The detected nuclear quadrupole resonance (-NQR The nuclear electric quadrupole moment, Q, is a direct measure of the nuclear charge distribution. An rf leak test performed on the constructed system showed no significant rf leak- age from the high

Mantica, Paul F.

450

A General Method to Estimate Earthquake Moment and Magnitude using Regional Phase Amplitudes  

Science Conference Proceedings (OSTI)

This paper presents a general method of estimating earthquake magnitude using regional phase amplitudes, called regional M{sub o} or regional M{sub w}. Conceptually, this method uses an earthquake source model along with an attenuation model and geometrical spreading which accounts for the propagation to utilize regional phase amplitudes of any phase and frequency. Amplitudes are corrected to yield a source term from which one can estimate the seismic moment. Moment magnitudes can then be reliably determined with sets of observed phase amplitudes rather than predetermined ones, and afterwards averaged to robustly determine this parameter. We first examine in detail several events to demonstrate the methodology. We then look at various ensembles of phases and frequencies, and compare results to existing regional methods. We find regional M{sub o} to be a stable estimator of earthquake size that has several advantages over other methods. Because of its versatility, it is applicable to many more events, particularly smaller events. We make moment estimates for earthquakes ranging from magnitude 2 to as large as 7. Even with diverse input amplitude sources, we find magnitude estimates to be more robust than typical magnitudes and existing regional methods and might be tuned further to improve upon them. The method yields a more meaningful quantity of seismic moment, which can be recast as M{sub w}. Lastly, it is applied here to the Middle East region using an existing calibration model, but it would be easy to transport to any region with suitable attenuation calibration.

Pasyanos, M E

2009-11-19T23:59:59.000Z

451

Heart stopping moments with zebrafish: imaging inside the living, beating heart  

E-Print Network (OSTI)

Heart stopping moments with zebrafish: imaging inside the living, beating heart Seamless this application, enabling researchers to carry out precision "healing" studies on the moving heart by targeting of development Jonathan M. Taylor, Glasgow University d "Realtime Optical Gating for 3D Heart Imaging", Journal

Greenaway, Alan

452

Investigations of the torque anomaly in an annular sector. II. Global calculations, electromagnetic case  

E-Print Network (OSTI)

Recently, it was suggested that there was some sort of breakdown of quantum field theory in the presence of boundaries, manifesting itself as a torque anomaly. In particular, Fulling et al. used the finite energy-momentum-stress tensor in the presence of a perfectly conducting wedge, calculated many years ago by Deutsch and Candelas, to compute the torque on one of the wedge boundaries, where the latter was cutoff by integrating the torque density down to minimum lower radius greater than zero. They observed that that torque is not equal to the negative derivative of the energy obtained by integrating the energy density down to the same minimum radius. This motivated a calculation of the torque and energy in an annular sector obtained by the intersection of the wedge with two coaxial cylinders. In a previous paper we showed that for the analogous scalar case, which also exhibited a torque anomaly in the absence of the cylindrical boundaries, the point-split regulated torque and energy indeed exhibit an anomaly, unless the point-splitting is along the axis direction. In any case, because of curvature divergences, no unambiguous finite part can be extracted. However, that ambiguity is linear in the wedge angle; if the condition is imposed that the linear term be removed, the resulting torque and energy is finite, and exhibits no anomaly. In this paper, we demonstrate the same phenomenon takes place for the electromagnetic field, so there is no torque anomaly present here either. This is a nontrivial generalization, since the anomaly found by Fulling et al. is linear for the Dirichlet scalar case, but nonlinear for the conducting electromagnetic case.

Kimball A. Milton; Prachi Parashar; E. K. Abalo; Fardin Kheirandish; Klaus Kirsten

2013-07-09T23:59:59.000Z

453

A High-Order Finite-Volume Algorithm for Fokker-Planck Collisions in Magnetized Plasmas  

SciTech Connect

A high-order finite volume algorithm is developed for the Fokker-Planck Operator (FPO) describing Coulomb collisions in strongly magnetized plasmas. The algorithm is based on a general fourth-order reconstruction scheme for an unstructured grid in the velocity space spanned by parallel velocity and magnetic moment. The method provides density conservation and high-order-accurate evaluation of the FPO independent of the choice of the velocity coordinates. As an example, a linearized FPO in constant-of-motion coordinates, i.e. the total energy and the magnetic moment, is developed using the present algorithm combined with a cut-cell merging procedure. Numerical tests include the Spitzer thermalization problem and the return to isotropy for distributions initialized with velocity space loss cones. Utilization of the method for a nonlinear FPO is straightforward but requires evaluation of the Rosenbluth potentials.

Xiong, Z; Cohen, R H; Rognlien, T D; Xu, X Q

2007-04-18T23:59:59.000Z

454

Magneto-electric Effect and Magnetic Charge  

E-Print Network (OSTI)

It is shown that both the electric and magnetic dipole moment vectors of hydrogen atom in the excited states with wave function $$ u_n^{(\\pm)} = {1\\over\\sqrt 2} [R_{n,n-1}(r) Y_{n-1,\\pm (n-2)}(\\theta\\phi) \\pm R_{n,n-2}(r) Y_{n-2,\\pm (n-2)}(\\theta\\phi)]$$ align themselves in the direction of an external uniform electric field which is characteristic of magneto-electric effect. These states are found to have magnetic charge $g={3n\\over (n-2)e}$ on account of this effect. This result is confirmed by an independent method. An experiment is suggested to fabricate these states and detect the magnetic charge. It ma be worth noting that inspite of many experimental searchs, magnetic charge, whose existence has been theorized both in electrodynamics and non-abelian gauge theories, none have been found so far, nor there exist any suggstion as to where these are to be found.

T. Pradhan

2003-12-10T23:59:59.000Z

455

Neutrino Propagation in a Strongly Magnetized Medium  

E-Print Network (OSTI)

We derive general expressions at the one-loop level for the coefficients of the covariant structure of the neutrino self-energy in the presence of a constant magnetic field. The neutrino energy spectrum and index of refraction are obtained for neutral and charged media in the strong-field limit ($M_{W}\\gg \\sqrt{B}\\gg m_{e},T,\\mu ,| \\mathbf{p}| $) using the lowest Landau level approximation. The results found within the lowest Landau level approximation are numerically validated, summing in all Landau levels, for strong $B\\gg T^{2}$ and weakly-strong $B \\gtrsim T^{2}$ fields. The neutrino energy in leading order of the Fermi coupling constant is expressed as the sum of three terms: a kinetic-energy term, a term of interaction between the magnetic field and an induced neutrino magnetic moment, and a rest-energy term. The leading radiative correction to the kinetic-energy term depends linearly on the magnetic field strength and is independent of the chemical potential. The other two terms are only present in a charged medium. For strong and weakly-strong fields, it is found that the field-dependent correction to the neutrino energy in a neutral medium is much larger than the thermal one. Possible applications to cosmology and astrophysics are considered.

E. Elizalde; E. J. Ferrer; V. de la Incera

2004-04-26T23:59:59.000Z

456

Neutrino Propagation in a Strongly Magnetized Medium  

E-Print Network (OSTI)

We derive general expressions at the one-loop level for the coefficients of the covariant structure of the neutrino self-energy in the presence of a constant magnetic field. The neutrino energy spectrum and index of refraction are obtained for neutral and charged media in the strong-field limit ($M_{W}\\gg \\sqrt{B}\\gg m_{e},T,\\mu ,| \\mathbf{p}| $) using the lowest Landau level approximation. The results found within the lowest Landau level approximation are numerically validated, summing in all Landau levels, for strong $B\\gg T^{2}$ and weakly-strong $B \\gtrsim T^{2}$ fields. The neutrino energy in leading order of the Fermi coupling constant is expressed as the sum of three terms: a kinetic-energy term, a magnetic-field neutrino-induced-magnetic-moment interaction term, and a rest-energy term. The leading radiative correction to the kinetic-energy term depends linearly on the magnetic field strength and is independent of the chemical potential. The other two terms are only present in a charged medium. For str...

Elizalde, E; De la Incera, V

2004-01-01T23:59:59.000Z

457

Ramp-rate sensitivity of SSC dipole magnet prototypes  

SciTech Connect

One of the major achievements of the magnet R&D program for the Superconducting Super Collider (SSC) is the fabrication and test of a series of 20 5-cm aperture, 15-m long dipole magnet prototypes. The ramp rate sensitivity of these magnets appears to fall in at least two categories that can be correlated to the manufacturer and production batch of the strands used for the inner-coil cables. The first category, referred to as type-A, is characterized by a strong quench current degradation at high ramp rates, usually accompanied by large distortions of the multipole fields and large energy losses. The second category, referred to as type-B, is characterized by a sudden drop of quench current at low ramp rates, followed by a much milder degradation at larger rates. The multipole fields of the type-B magnets show little ramp-rate sensitivity, and the energy losses are smaller than for the type-A magnets. The behavior of the Type-A magnets can be explained in terms of inter-strand eddy currents arising from low and non-uniform resistances at the crossovers between the strands of the two-layer Rutherford-type cable. Anomalies in the transport-current repartition among the cable strands are suggested as a possible cause for the type-B behavior. The origins of these anomalies have not yet been clearly identified. The SSC project was canceled by decision of the United States Congress on October 21, 1994.

Devred, A.; Ogitsu, T.

1994-07-01T23:59:59.000Z

458

XMCD experimental station optimized for ultrathin magnetic films at HiSOR-BL14  

Science Conference Proceedings (OSTI)

We have constructed a system for in situ X-ray magnetic circular dichroism (XMCD) measurements of ultrathin magnetic films at the soft X-ray beamline HiSOR-BL14 at Hiroshima Synchrotron Radiation Center. The XMCD experimental station is directly connected to the beamline, and equipped with a sample fabrication chamber where various types of ultrathin magnetic films can be grown with monatomic layer control. XMCD spectra of the as-grown samples can be measured with adequate precision for the analysis of magnetic moments, under proper control of the light polarization in the beamline optics. This system has enabled the investigation of natural magnetic states in the ultrathin magnetic films without the influence of surface oxidation or any cap-layers.

Sawada, Masahiro; Namatame, Hirofumi [Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hirohisma, Hiroshima 739-0046 (Japan); Ueno, Tetsuro; Tagashira, Tetsuro [Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046 (Japan); Taniguchi, Masaki [Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hirohisma, Hiroshima 739-0046 (Japan); Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046 (Japan)

2010-06-23T23:59:59.000Z

459

Approximate Integrals of rf-driven Particle Motion in Magnetic Field  

DOE Green Energy (OSTI)

For a particle moving in nonuniform magnetic field under the action of an rf wave, ponderomotive effects result from rf-driven oscillations nonlinearly coupled with Larmor rotation. Using Lagrangian and Hamiltonian formalism, we show how, despite this coupling, two independent integrals of the particle motion are approximately conserved. Those are the magnetic moment of free Larmor rotation and the quasi-energy of the guiding center motion parallel to the magnetic field. Under the assumption of non-resonant interaction of the particle with the rf field, these integrals represent adiabatic invariants of the particle motion.

I.Y. Dodin; N.J. Fisch

2004-04-26T23:59:59.000Z

460

Homometallic and Heterometallic Antiferromagnetic Rings: Magnetic Properties Studied by Nuclear Magnetic Resonance  

SciTech Connect

The aim of the present thesis is to investigate the local magnetic properties of homometallic Cr{sub 8} antiferromagnetic (AFM) ring and the changes occurring by replacing one Cr{sup 3+} ion with diamagnetic Cd{sup 2+} (Cr{sub 7}Cd) and with Ni{sup 2+} (Cr{sub 7}Ni). In the heterometallic ring a redistribution of the local magnetic moment is expected in the low temperature ground state. We have investigated those changes by both {sup 53}Cr-NMR and {sup 19}F-NMR. We have determined the order of magnitude of the transferred hyperfine coupling constant {sup 19}F - M{sup +} where M{sup +} = Cr{sup 3+}, Ni{sup 2+} in the different rings. This latter result gives useful information about the overlapping of the electronic wavefunctions involved in the coordinative bond.

Casadei, Cecilia

2012-05-09T23:59:59.000Z

Note: This page contains sample records for the topic "magnetic moment anomaly" 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

Magnet innovations for linacs  

Science Conference Proceedings (OSTI)

It is possible to produce large magnetic fields at the aperture of permanent magnet quadrupoles, even when the magnetic aperture is very small. That, combined with their compactness, makes permanent magnet quadrupoles very powerful components of small aperture linacs. Results will be presented about past and present work on both fixed and variable strength permanent magnets suitable for use in and around linacs.

Halbach, K.

1986-06-01T23:59:59.000Z

462

Watch it Live at 1pm: Secretary Chu Talks "Sputnik Moment" at Press Club |  

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

Watch it Live at 1pm: Secretary Chu Talks "Sputnik Moment" at Press Watch it Live at 1pm: Secretary Chu Talks "Sputnik Moment" at Press Club Watch it Live at 1pm: Secretary Chu Talks "Sputnik Moment" at Press Club November 29, 2010 - 11:39am Addthis At 1pm ET today, Secretary Chu will deliver a speech at the National Press Club in DC calling on the United States to sharply accelerate innovations in clean energy -- citing China and other countries' recent advances in clean technology as a critical "Sputnik Moment" for the U.S. The event will begin at 12:30, and Chu will deliver his remarks at 1, followed by a question and answer session. You'll be able to watch live online here. UPDATE: Follow along with Secretary Chu's "Energy Race/Sputnik Moment" powerpoint as he talks live at the Press Club right now. (PDF) , (PPT)

463

Superconducting magnet  

DOE Patents (OSTI)

A superconducting magnet designed to produce magnetic flux densities of the order of 4 to 5 Webers per square meter is constructed by first forming a cable of a plurality of matrixed superconductor wires with each wire of the plurality insulated from each other one. The cable is shaped into a rectangular cross-section and is wound with tape in an open spiral to create cooling channels. Coils are wound in a calculated pattern in saddle shapes to produce desired fields, such as dipoles, quadrupoles, and the like. Wedges are inserted between adjacent cables as needed to maintain substantially radial placement of the long dimensions of cross sections of the cables. After winding, individual strands in each of the cables are brought out to terminals and are interconnected to place all of the strands in series and to maximize the propagation of a quench by alternating conduction from an inner layer to an outer layer and from top half to bottom half as often as possible. Individual layers are separated from others by spiraled aluminum spacers to facilitate cooling. The wound coil is wrapped with an epoxy tape that is cured by heat and then machined to an interference fit with an outer aluminum pipe which is then affixed securely to the assembled coil by heating it to make a shrink fit. In an alternate embodiment, one wire of the cable is made of copper or the like to be heated externally to propagate a quench.

Satti, John A. (Naperville, IL)

1980-01-01T23:59:59.000Z

464

Magnetism in Non-Traditional Materials  

SciTech Connect

We performed a systematic microscopic investigation of two completely dissimilar materials (namely, ZnO and rhombohedral-C{sub 60} polymers) exhibiting ferromagnetism in the presence of defects, and showed that this new phenomena has a common origin and the mechanism responsible can be used as a powerful tool for inducing and tailoring magnetic features in systems which are not magnetic otherwise. Based on our findings we proposed a general recipe for developing ferromagnetism in new materials of great technological interest. Our results support the role of complimentary pairs of defects in inducing magnetism in otherwise non-magnetic materials belonging to two widely differing classes with no apparent correlation between them. In both classes, ferromagnetism is found to be enhanced when the two kinds of defects form structures (pathways) of alternating effective donor and acceptor crystal sites leading to the development of electron charge and spin density like waves. Using ab initio density functional theory calculations we predicted the existence of a new class of carbon cages formed via hybrid connection between planar graphene sheets and carbon nanotubes. The resulting novel structure has the appearance of ?nano-drum? and offers the exciting prospect of integrating useful device properties of both graphene as well as the nanotube into a single unit with tunable electronic properties. Creation of a hexagonal hole in the graphene portion of this structure results in significant magnetic moments for the edge atoms. The structure appears to be capable of sustaining ferrimagnetic state with the assistance of topological defects. The charge and spin distributions obtained in our calculations for the nano-drums are in striking contrast to those in planar graphene nanoribbons with a central hole. In this case, the central hole appears as the complimentary defect to those of the ribbon edges. Similar situation is found in case of the nano-drum in which the complimentary to the hole defects appear to be the pentagons along the curved surface of the drum. Charge oscillations found in the nano-drum are minimized in the nanoribbons. But more importantly, the hole edge atoms in the nano-drums retain significant magnetic moments; almost twice those of the corresponding ones in hydrogenated graphene nanoribbons (H-GNRs). These results suggest that the topological defects in the nano-drums may act like blocks to keep magnetic moments from ?leaking? out from the hole defects. This may have significant implications for the the use of nano-drums in magnetic storage technology where the ratio, magnetic-moment/weight, is of paramount importance in any futuristic device applications. One of the basic problems of the DFT/LSDA+U theory is the efficient evaluation of the U-term. With this in mind we proposed an alternative approach for its calculation which is based on the knowledge of the Hartree-Fock wave functions of the system under consideration. As a result, the proposed approach is closer to the basic definition of the DFT/LSDA+U scheme and its hybrid-DFT nature. According to our approach, the U value is obtained in a consistent and ab-initio way using the self-consistently calculated wave functions of the given system at the level of the HF approximation. Our method is applicable for systems which include more than one type of elements with localized d-orbitals. The method has been applied the case of the doped Zn(Co)O systems successfully. Currently, theories based on conventional superexchange or double-exchange interactions cannot explain long range magnetic order at concentrations below percolation threshold in dilute magnetic semiconductors. On the other hand, the codoping induced magnetism, which can justify magnetic interactions below percolation threshold, has eluded explanation. With this in mind, we proposed that defect-induced magnetism in codoped non-magnetic materials can be viewed within a molecular generalization of the atomic double-exchange and superexchange interactions applied to an arbitrary bipartite lattice host

Menon, Madhu

2013-09-17T23:59:59.000Z

465

X-ray magnetic circular dichroism of ferromagnetic Co{sub 4}N epitaxial films on SrTiO{sub 3}(001) substrates grown by molecular beam epitaxy  

Science Conference Proceedings (OSTI)

5-nm thick Co{sub 4}N layers capped with 3-nm thick Au layers were grown epitaxially on SrTiO{sub 3}(001) substrates by molecular beam epitaxy using solid Co and a radio-frequency NH{sub 3} plasma. Spin and orbital magnetic moments of the Co{sub 4}N layers were estimated using x-ray magnetic circular dichroism (XMCD) measurements at 300 K. The site-averaged Co 3d spin magnetic moment is evaluated to be about 1.4 {mu}{sub B}, which is smaller than that predicted theoretically (1.58 {mu}{sub B}). The element-specific XMCD intensities for the Co L{sub 3} edge and N K edge show that the magnetic moment is induced at the N atoms.

Ito, Keita; Harada, Kazunori; Toko, Kaoru; Suemasu, Takashi [Institute of Applied Physics, University of Tsukuba, Ibaraki 305-8573 (Japan); Ye, Mao; Kimura, Akio [Graduate School of Science, Hiroshima University, Hiroshima 739-8526 (Japan); Takeda, Yukiharu; Saitoh, Yuji [Japan Atomic Energy Agency (JAEA), SPring-8, Hyogo 679-5198 (Japan); Akinaga, Hiro [National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8569 (Japan)

2011-12-19T23:59:59.000Z

466

Automated system for near-real time modelling and prediction of altimeter-derived sea level anomalies  

Science Conference Proceedings (OSTI)

This paper serves as a presentation of a novel geoinformation system and a dedicated service, jointly named as Prognocean and based at the University of Wroclaw (Poland), that aim to predict Sea Level Anomaly (SLA) maps and publish them online. The system ... Keywords: Geoinformation, Modelling, Prediction, Satellite altimetry, Sea level anomaly, System

Tomasz Niedzielski, Bart?Omiej Mizi?Ski

2013-08-01T23:59:59.000Z

467

Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism  

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

Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Print Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Print Using spectroscopic information for magnetometry and magnetic microscopy obviously requires detailed theoretical understanding of spectral shape and magnitude of dichroism signals. A research team at ALS Beamline 4.0.2 has now shown unambiguously that, contrary to common belief, spectral shape and magnitude of x-ray magnetic linear dichroism (XMLD) are not only determined by the relative orientation of magnetic moments and x-ray polarization, but their orientation relative to the crystallographic axes must be taken into account for accurate interpretation of XMLD data. Magnetism and X Rays The ancient Greeks and also the Chinese knew about strange and rare stones with the power to attract iron. Moreover, when freely suspended these objects pointed north-south. Throughout the past, we have used this phenomenon-magnetism-for navigation and more recently for power production and digital information storage, all while trying to explore and understand its origins. In 1986 researchers at a facility similar to the ALS observed for the first time that the absorption of x rays depends not only on the composition of a material-that is, if it contains iron, nickel, or other elements-but also on its magnetism. The effect is unique in that it allows us to distinguish which atomic species magnetism originates from and provides information about their local atomic environment-for example, whether a magnetic species is surrounded by 4 or 6 oxygen atoms. A research team at the ALS has now shown that the relationship between magnetic order and absorption of x rays is even more complex and exciting than has been assumed for the past 20 years, leading to a reassessment of previous results.

468

Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism  

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

Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Print Unexpected Angular Dependence of X-Ray Magnetic Linear Dichroism Print Using spectroscopic information for magnetometry and magnetic microscopy obviously requires detailed theoretical understanding of spectral shape and magnitude of dichroism signals. A research team at ALS Beamline 4.0.2 has now shown unambiguously that, contrary to common belief, spectral shape and magnitude of x-ray magnetic linear dichroism (XMLD) are not only determined by the relative orientation of magnetic moments and x-ray polarization, but their orientation relative to the crystallographic axes must be taken into account for accurate interpretation of XMLD data. Magnetism and X Rays The ancient Greeks and also the Chinese knew about strange and rare stones with the power to attract iron. Moreover, when freely suspended these objects pointed north-south. Throughout the past, we have used this phenomenon-magnetism-for navigation and more recently for power production and digital information storage, all while trying to explore and understand its origins. In 1986 researchers at a facility similar to the ALS observed for the first time that the absorption of x rays depends not only on the composition of a material-that is, if it contains iron, nickel, or other elements-but also on its magnetism. The effect is unique in that it allows us to distinguish which atomic species magnetism originates from and provides information about their local atomic environment-for example, whether a magnetic species is surrounded by 4 or 6 oxygen atoms. A research team at the ALS has now shown that the relationship between magnetic order and absorption of x rays is even more complex and exciting than has been assumed for the past 20 years, leading to a reassessment of previous results.

469

Application of magnetic method to assess the extent of high temperature geothermal reservoirs  

DOE Green Energy (OSTI)

The extent of thermally altered rocks in high temperature geothermal reservoirs hosted by young volcanic rocks can be assessed from magnetic surveys. Magnetic anomalies associated with many geothermal field in New Zealand and Indonesia can be interpreted in terms of thick (up to 1 km) demagnetized reservoir rocks. Demagnetization of these rocks has been confirmed by core studies and is caused by hydrothermal alteration produced from fluid/rock interactions. Models of the demagnetized Wairakei (NZ) and Kamojang (Indonesia) reservoirs are presented which include the productive areas. Magnetic surveys give fast and economical investigations of high temperature prospects if measurements are made from the air. The magnetic interpretation models can provide important constraints for reservoir models. Magnetic ground surveys can also be used to assess the extent of concealed near surface alteration which can be used in site selection of engineering structures.

Soengkono, S.; Hochstein, M.P.

1995-01-26T23:59:59.000Z

470

Solar turbulence in earth's global and regional temperature anomalies Nicola Scafetta,1,2  

E-Print Network (OSTI)

Solar turbulence in earth's global and regional temperature anomalies Nicola Scafetta,1,2 Paolo a study of the influence of solar activity on the earth's temperature. In particular, we focus on the repercussion of the fluctuations of the solar irradiance on the temperature of the Northern and Southern

Scafetta, Nicola

471

Improved Skill for the Anomaly Correlation of Geopotential Heights at 500 hPa  

Science Conference Proceedings (OSTI)

This paper addresses the anomaly correlation of the 500-hPa geopotential heights from a suite of global multimodels and from a model-weighted ensemble mean called the superensemble. This procedure follows a number of current studies on weather ...

T. N. Krishnamurti; K. Rajendran; T. S. V. Vijaya Kumar; Stephen Lord; Zoltan Toth; Xiaolei Zou; Steven Cocke; Jon E. Ahlquist; I. Michael Navon

2003-06-01T23:59:59.000Z

472

RFID-based human behavior modeling and anomaly detection for elderly care  

Science Conference Proceedings (OSTI)

This research aimed at building an intelligent system that can detect abnormal behavior for the elderly at home. Active RFID tags can be deployed at home to help collect daily movement data of the elderly who carries an RFID reader. When the reader detects ... Keywords: RFID, anomaly detection, behavior modeling, clustering, elderly care

Hui-Huang Hsu; Chien-Chen Chen

2010-12-01T23:59:59.000Z

473

Data flow analysis for anomaly detection and identification toward resiliency in extreme scale systems  

Science Conference Proceedings (OSTI)

The increased complexity and scale of high performance computing and future extreme-scale systems have made resilience a key issue, since it is expected that future systems will have various faults during critical operations. It is also expected that ... Keywords: Anomaly, Data analysis, Fault detection and identification, Resilience

Byoung Uk Kim

2012-07-01T23:59:59.000Z

474

A new dissimilarity measure for trajectories with applications in anomaly detection  

Science Conference Proceedings (OSTI)

Trajectory clustering has been used to very effectively in the detection of anomalous behavior in video sequences. A key point in trajectory clustering is how to measure the (dis)similarity between two trajectories. This paper deals with a new dissimilarity ... Keywords: anomaly detection, dissimilarity, trajectory clustering

Dustin L. Espinosa-Isidrón; Edel B. García-Reyes

2010-11-01T23:59:59.000Z

475

Trace anomaly and Hawking effect in 2D dilaton gravity theories  

E-Print Network (OSTI)

We investigate the classical and semiclassical features of generic 2D, matter-coupled, dilaton gravity theories. In particular, we show that the mass, the temperature and the flux of Hawking radiation associated with 2D black holes are invariant under dilaton-dependent Weyl rescalings of the metric. The relationship between quantum anomalies and Hawking radiation is discussed.

Mariano Cadoni

1996-12-16T23:59:59.000Z

476

Linkages between 200-mb Tropical and Extratropical Circulation Anomalies during the 1986–1989 ENSO Cycle  

Science Conference Proceedings (OSTI)

NMC operational wind analyses have been used to document the 200-mb circulation anomalies during the solstice seasons of the 1987–1989 ENSO cycle. Using the one-level vorticity balance diagnostic approach, the 200-mb Rossby wave anomalous source ...

Eugene M. Rasmusson; Kingtse Mo

1993-04-01T23:59:59.000Z

477

Estimation of the Surface Heat Flux Response to Sea Surface Temperature Anomalies over the Global Oceans  

Science Conference Proceedings (OSTI)

The surface heat flux response to underlying sea surface temperature (SST) anomalies (the surface heat flux feedback) is estimated using 42 yr (1956–97) of ship-derived monthly turbulent heat fluxes and 17 yr (1984–2000) of satellite-derived ...

Sungsu Park; Clara Deser; Michael A. Alexander

2005-11-01T23:59:59.000Z

478

Modeling of North Pacific Climate Variability Forced by Oceanic Heat Flux Anomalies  

Science Conference Proceedings (OSTI)

Potential predictability of low-frequency climate changes in the North Pacific depends on two main factors. The first is the sensitivity of the atmosphere to ocean-induced anomalies at the sea surface in midlatitudes. The second is the degree of ...

Elena Yulaeva; Niklas Schneider; David W. Pierce; Tim P. Barnett

2001-10-01T23:59:59.000Z

479

Anomaly detection using self-organizing map and wavelets in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks (WSNs) have been developed and extensively applied in agriculture monitoring to monitor and collect various physical attributes within a specific area or environment of interest. Data readings from the sensors may be abnormal ... Keywords: agriculture monitoring, anomaly detection, discrete wavelet transform, self-organizing map, wavelets, wireless sensor networks

Supakit Siripanadorn; Wipawee Hattagam; Neung Teaumroong

2010-10-01T23:59:59.000Z

480

A prediction model for anomalies in smart grid with sensor network  

Science Conference Proceedings (OSTI)

A machine learning based model to monitor the smart grid for any suspicious activity or malicious attack is presented in this paper. The model is designed to detect and classify anomalies in the sensory data and is helpful in ensuring the security and ...

Shubhalaxmi Kher; Victor Nutt; Dipankar Dasgupta; Hasan Ali; Paul Mixon

2013-01-01T23:59:59.000Z

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


481

Testing a Dynamical Model for Mid-Latitude Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

A slab model of the oceanic mixed layer is used to predict the statistical characteristics of the sea surface temperature anomalies that are forced by day-to-day changes in air-sea fluxes in the presence of a mean current. Because of the short ...

Claude Frankignoul; Richard W. Reynolds

1983-07-01T23:59:59.000Z

482

An updated global grid point surface air temperature anomaly data set: 1851--1990  

Science Conference Proceedings (OSTI)

This document presents land-based monthly surface air temperature anomalies (departures from a 1951--1970 reference period mean) on a 5{degree} latitude by 10{degree} longitude global grid. Monthly surface air temperature anomalies (departures from a 1957--1975 reference period mean) for the Antarctic (grid points from 65{degree}S to 85{degree}S) are presented in a similar way as a separate data set. The data were derived primarily from the World Weather Records and the archives of the United Kingdom Meteorological Office. This long-term record of temperature anomalies may be used in studies addressing possible greenhouse-gas-induced climate changes. To date, the data have been employed in generating regional, hemispheric, and global time series for determining whether recent (i.e., post-1900) warming trends have taken place. This document also presents the monthly mean temperature records for the individual stations that were used to generate the set of gridded anomalies. The periods of record vary by station. Northern Hemisphere station data have been corrected for inhomogeneities, while Southern Hemisphere data are presented in uncorrected form. 14 refs., 11 figs., 10 tabs.

Sepanski, R.J.; Boden, T.A.; Daniels, R.C.

1991-10-01T23:59:59.000Z

483

Seismo-geomagnetic anomalies and M P 5.0 earthquakes observed in Taiwan during 19882001  

E-Print Network (OSTI)

Seismo-geomagnetic anomalies and M P 5.0 earthquakes observed in Taiwan during 1988­2001 J.Y. Liu a, a relationship between M P 5.0 earthquakes and diurnal variations of the total geomagnetic field recorded the near-by geomagnetic field on the ground during the earthquake preparation period. The statistical

Chen, Yuh-Ing

484

Can North Atlantic Sea Ice Anomalies Account for Dansgaard–Oeschger Climate Signals?  

Science Conference Proceedings (OSTI)

North Atlantic sea ice anomalies are thought to play an important role in the abrupt Dansgaard–Oeschger (D–O) cycles of the last glacial period. This model study investigates the impacts of changes in North Atlantic sea ice extent in glacial ...

Camille Li; David S. Battisti; Cecilia M. Bitz

2010-10-01T23:59:59.000Z

485

Asymmetry of Atmospheric Circulation Anomalies over the Western North Pacific between El Niño and La Niña  

Science Conference Proceedings (OSTI)

The asymmetry of the western North Pacific (WNP) low-level atmospheric circulation anomalies between the El Niño and La Niña mature winter is examined. An anomalous WNP cyclone (WNPC) center during La Niña tends to shift westward relative to an ...

Bo Wu; Tim Li; Tianjun Zhou

2010-09-01T23:59:59.000Z

486

Magnetics and the body  

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

no magnetic "charges"), such as from electromagnets. Magnetic fields are measured in Tesla (T) or Gauss (G). The Tesla is a very large unit (1 T 10,000 G). Most large magnets...

487

Learning About Magnets!  

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

the National High Magnetic Field Laboratory Learning About Name A magnet is a material or object that creates a magnetic fi eld. This fi eld is invisible, but it creates a force...

488

ALS superbend magnet system  

E-Print Network (OSTI)

ALS Superbend Magnet System J. Zbasnik † , S. T. Wang †† ,of a High-Field Magnet for the ALS,” Transactions AppliedRefrigeration options for the ALS Superbend dipole magnets”,

2000-01-01T23:59:59.000Z

489

Isochronal Annealing Studies in Pu and Pu Alloys Using Magnetic Susceptibility  

Science Conference Proceedings (OSTI)

The isochronal annealing of the low temperature accumulated damage from the radioactive decay of plutonium in {alpha}-Pu, {delta}-Pu{sub 1-x}Ga{sub x} (x = 0.043) and {delta}-Pu{sub 1-x}Am{sub x} (x = 0.224) was characterized using magnetic susceptibility. In each specimen, thermal annealing, as tracked by magnetic susceptibility, only commenced when T > 33 K and the magnetic susceptibility changes due to defects were fully annealed at T not, vert, similar 300 K. The {alpha}-Pu magnetic susceptibility isochronal annealing data is similar to earlier measurements of resistivity characterized isochronal annealing. However, the {delta}-Pu{sub 1-x}Ga{sub x} (x = 0.043) magnetic susceptibility isochronal annealing data, when compared with similar resistivity data, indicates that for this alloy magnetic susceptibility studies are more sensitive to vacancies than to the interstitials accumulated at low temperatures. The Pu{sub 1-x}Am{sub x} (x = 0.224) alloy shows a remarkable change in properties, over a limited temperature range beginning where interstitial defects are first mobile, and characterized by an induced effective moment of order 1.1 {mu}{sub B}/Pu. This transient behavior may be evidence for a disorder driven low temperature phase transition, perhaps indicative of a compositional and structural proximity to a state possessing significant magnetic moments.

McCall, S. K. [Lawrence Livermore National Laboratory (LLNL); Fluss, M. J. [Lawrence Livermore National Laboratory (LLNL); Chung, B. W. [Lawrence Livermore National Laboratory (LLNL); McElfresh, M. W. [Lawrence Livermore National Laboratory (LLNL); Chapline, G.F. [Lawrence Livermore National Laboratory (LLNL); Jackson, D. D. [Lawrence Livermore National Laboratory (LLNL); Haire, Richard {Dick} G [ORNL

2007-01-01T23:59:59.000Z

490

Core-softened Fluids, Water-like Anomalies and the Liquid-Liquid Critical Points  

E-Print Network (OSTI)

Molecular dynamics simulations are used to examine the relationship between water-like anomalies and the liquid-liquid critical point in a family of model fluids with multi-Gaussian, core-softened pair interactions. The core-softened pair interactions have two length scales, such that the longer length scale associated with a shallow, attractive well is kept constant while the shorter length scale associated with the repulsive shoulder is varied from an inflexion point to a minimum of progressively increasing depth. As the shoulder well depth increases, the pressure required to form the high density liquid decreases and the temperature up to which the high-density liquid is stable increases, resulting in the shift of the liquid-liquid critical point to much lower pressures and higher temperatures. The pair correlation entropy is computed to show that the excess entropy anomaly diminishes when the shoulder well depth increases. Excess entropy scaling of diffusivity in this class of fluids is demonstrated, showing that decreasing strength of the excess entropy anomaly with increasing shoulder depth results in the progressive loss of water-like thermodynamic, structural and transport anomalies. Instantaneous normal mode analysis was used to index the overall curvature distribution of the fluid and the fraction of imaginary frequency modes was shown to correlate well with the anomalous behaviour of the diffusivity and the pair correlation entropy. The results suggest in the case of core-softened potentials, in addition to the presence of two length scales, energetic and entropic effects associated with local minima and curvatures of the pair interaction play an important role in determining the presence of water-like anomalies and the liquid-liquid phase transition.

Evy Salcedo; Alan B. de Oliveira; Ney M. Barraz Jr; Charusita Chakravarty; Marcia C. Barbosa

2011-03-21T23:59:59.000Z

491

Helical Magnets Project | Superconducting Magnet Division  

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

RHIC, the basic construction unit is a superconducting dipole magnet producing a four tesla dipole field that rotates through 360 degrees in a length of 2.4 meters. The magnets...

492

President Obama in North Carolina: "Our Generation's Sputnik Moment is  

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

in North Carolina: "Our Generation's Sputnik in North Carolina: "Our Generation's Sputnik Moment is Now" President Obama in North Carolina: "Our Generation's Sputnik Moment is Now" December 6, 2010 - 4:53pm Addthis Andy Oare Andy Oare Former New Media Strategist, Office of Public Affairs Ed. Note cross posted from the White House Blog. As America fights to recover from the economic catastrophe that began almost three years ago, it's important to remember that America had already been falling behind, and that as we rebuild, we have to rebuild even better than we were before. The President talked about his vision and his specific proposals at the Forsyth Technical Community College in Winston-Salem, North Carolina this afternoon: In 1957, just before this college opened, the Soviet Union beat us into

493

THIRD MOMENTS AND THE ROLE OF ANISOTROPY FROM VELOCITY SHEAR IN THE SOLAR WIND  

Science Conference Proceedings (OSTI)

We have extended the recent analyses of magnetohydrodynamic third moments as they relate to the turbulent energy cascade in the solar wind to consider the effects of large-scale shear flows. Moments from a large set of Advanced Composition Explorer data have been taken, and chosen data intervals are characterized by the rate of change in the solar wind speed. Mean dissipation rates are obtained in accordance with the predictions of homogeneous shear-driven turbulence. Agreement with predictions is best made for rarefaction intervals where the solar wind speed is decreasing with time. For decreasing speed intervals, we find that the dissipation rates increase with increasing shear magnitude and that the shear-induced fluctuation anisotropy is consistent with a relatively small amount.

Stawarz, Joshua E.; Vasquez, Bernard J.; Smith, Charles W. [Physics Department, Space Science Center, University of New Hampshire, Durham, NH 03824 (United States); Forman, Miriam A. [Department of Physics and Astronomy, State University of New York at Stony Brook, Stony Brook, NY 11794-3800 (United States); Klewicki, Joseph, E-mail: jek32@cisunix.unh.edu, E-mail: Bernie.Vasquez@unh.edu, E-mail: Charles.Smith@unh.edu, E-mail: Miriam.Forman@sunysb.edu, E-mail: Joe.Klewicki@unh.edu [Mechanical Engineering Department, University of New Hampshire, Durham, NH 03824 (United States)

2011-07-20T23:59:59.000Z

494

Binomial moments of the distance distribution and the probability of undetected error  

Science Conference Proceedings (OSTI)

In [1] K.A.S. Abdel-Ghaffar derives a lower bound on the probability of undetected error for unrestricted codes. The proof relies implicitly on the binomial moments of the distance distribution of the code. The authors use the fact that these moments count the size of subcodes of the code to give a very simple proof of the bound in [1] by showing that it is essentially equivalent to the Singleton bound. They discuss some combinatorial connections revealed by this proof. They also discuss some improvements of this bound. Finally, they analyze asymptotics. They show that an upper bound on the undetected error exponent that corresponds to the bound of [1] improves known bounds on this function.

Barg, A. [Lucent Technologies, Murray Hill, NJ (United States). Bell Labs.; Ashikhmin, A. [Los Alamos National Lab., NM (United States)

1998-09-01T23:59:59.000Z

495

SUPERCONDUCTING MAGNETIC ENERGY STORAGE  

E-Print Network (OSTI)

Superconducting 30-MJ Energy Storage Coil", Proc. 19 80 ASC,Superconducting Magnetic Energy Storage Plant", IEEE Trans.SlIperconducting Magnetic Energy Storage Unit", in Advances

Hassenzahl, W.

2011-01-01T23:59:59.000Z

496

Magnetization of neutron matter  

SciTech Connect

In this paper, we compute magnetization of neutron matter at strong magnetic field using the lowest order constrained variational (LOCV) technique.

Bigdeli, M. [Department of Physics, Zanjan University, P.O. Box 45195-313, Zanjan (Iran, Islamic Republic of)

2011-09-21T23:59:59.000Z

497

Regenerator for Magnetic Refrigerants  

Ames Laboratory researchers have developed a new magnetic material that can be used at low temperatures (sub liquid hydrogen) for magnetic refrigerators.

498

Magnetic Materials Group Homepage  

Science Conference Proceedings (OSTI)

... and simulation to become the driving force in ... develop a real-time magnetic domain imaging ... data-storage and permanent magnets with increased ...

2012-12-03T23:59:59.000Z

499

The electric dipole moment of the nucleon from simulations at imaginary vacuum angle theta  

E-Print Network (OSTI)

We compute the electric dipole moment of proton and neutron from lattice QCD simulations with N_f=2 flavors of dynamical quarks at imaginary vacuum angle theta. The calculation proceeds via the CP odd form factor F_3. A novel feature of our calculation is that we use partially twisted boundary conditions to extract F_3 at zero momentum transfer. As a byproduct, we test the QCD vacuum at nonvanishing theta.

R. Horsley; T. Izubuchi; Y. Nakamura; D. Pleiter; P. E. L. Rakow; G. Schierholz; J. Zanotti

2008-08-10T23:59:59.000Z

500

Ce dernier potentiel d'ionisation peut servir au calcul des moments magntiques nuclaires du plutonium,  

E-Print Network (OSTI)

plutonium, mais nous avons constaté par la suite, qu'un facteur 2 a été omis dans notre calcul du nombre valeurs probables des moments magnétiques nucléaires sont : y(239Pu) = 0,175 + 0,040 magnétons nucléaires y(241Pu) = 0,62 ± 0,15 » » L'incertitude des résultats provient principalemenl des mesures de la

Paris-Sud XI, Université de