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1

Theo Brandsma KNMI, the Netherlands  

E-Print Network [OSTI]

Theo Brandsma KNMI, the Netherlands International workshop on the digitization of historical Possible codes Digitization and quality control #12;13 · Digitization and quality control Example page #12

Stoffelen, Ad

2

Geodesic Lines, . . . Covariant . . .  

E-Print Network [OSTI]

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

Gallier, Jean

3

Extremal covariant measurements  

E-Print Network [OSTI]

We characterize the extremal points of the convex set of quantum measurements that are covariant under a finite-dimensional projective representation of a compact group, with action of the group on the measurement probability space which is generally non-transitive. In this case the POVM density is made of multiple orbits of positive operators, and, in the case of extremal measurements, we provide a bound for the number of orbits and for the rank of POVM elements. Two relevant applications are considered, concerning state discrimination with mutually unbiased bases and the maximization of the mutual information.

G. Chiribella; G. M. D'Ariano

2006-03-20T23:59:59.000Z

4

Covariance regularization in inverse space  

E-Print Network [OSTI]

Apr 1, 2009 ... the data multiplied by a scale factor (Oke er of, 2002), .... covariances, where the vertical correlation scale depends .... Before examining local.

Administrator

5

Extremal covariant measurements Giulio Chiribellaa  

E-Print Network [OSTI]

Extremal covariant measurements Giulio Chiribellaa and Giacomo Mauro D'Arianob Istituto Nazionale characterize the extremal points of the convex set of quantum measurements that are covariant under a finite operators, and, in the case of extremal measurements, we provide a bound for the number of orbits

D'Ariano, Giacomo Mauro

6

CONSTRUCTION OF COVARIANCE MATRICES WITH A ...  

E-Print Network [OSTI]

The main goal of this paper is to develop a numerical procedure for construction of covariance matrices such that for a given covariance structural model and a ...

2009-05-28T23:59:59.000Z

7

Covariance evaluation work at LANL  

SciTech Connect (OSTI)

Los Alamos evaluates covariances for nuclear data library, mainly for actinides above the resonance regions and light elements in the enUre energy range. We also develop techniques to evaluate the covariance data, like Bayesian and least-squares fitting methods, which are important to explore the uncertainty information on different types of physical quantities such as elastic scattering angular distribution, or prompt neutron fission spectra. This paper summarizes our current activities of the covariance evaluation work at LANL, including the actinide and light element data mainly for the criticality safety study and transmutation technology. The Bayesian method based on the Kalman filter technique, which combines uncertainties in the theoretical model and experimental data, is discussed.

Kawano, Toshihiko [Los Alamos National Laboratory; Talou, Patrick [Los Alamos National Laboratory; Young, Phillip [Los Alamos National Laboratory; Hale, Gerald [Los Alamos National Laboratory; Chadwick, M B [Los Alamos National Laboratory; Little, R C [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

8

ISSUES IN NEUTRON CROSS SECTION COVARIANCES  

SciTech Connect (OSTI)

We review neutron cross section covariances in both the resonance and fast neutron regions with the goal to identify existing issues in evaluation methods and their impact on covariances. We also outline ideas for suitable covariance quality assurance procedures.We show that the topic of covariance data remains controversial, the evaluation methodologies are not fully established and covariances produced by different approaches have unacceptable spread. The main controversy is in very low uncertainties generated by rigorous evaluation methods and much larger uncertainties based on simple estimates from experimental data. Since the evaluators tend to trust the former, while the users tend to trust the latter, this controversy has considerable practical implications. Dedicated effort is needed to arrive at covariance evaluation methods that would resolve this issue and produce results accepted internationally both by evaluators and users.

Mattoon, C.M.; Oblozinsky,P.

2010-04-30T23:59:59.000Z

9

Perturbation theory in covariant canonical quantization  

E-Print Network [OSTI]

I investigate a new idea of perturbation theory in covariant canonical quantization. I present preliminary results for a toy model of a harmonic oscillator with a quartic perturbation, and show that this method reproduces the quantized spectrum of standard quantum theory. This result indicates that when the exact solutions to classical equations are not known, covariant canonical quantization via perturbation theory could be a viable approximation scheme for finding observables, and suggests a physically interesting way of extending the scope of covariant canonical quantization in quantum gravity

Sayandeb Basu

2004-12-22T23:59:59.000Z

10

Noncommutative Gauge Theory with Covariant Star Product  

SciTech Connect (OSTI)

We present a noncommutative gauge theory with covariant star product on a space-time with torsion. In order to obtain the covariant star product one imposes some restrictions on the connection of the space-time. Then, a noncommutative gauge theory is developed applying this product to the case of differential forms. Some comments on the advantages of using a space-time with torsion to describe the gravitational field are also given.

Zet, G. [Physics Department, 'Gh. Asachi' Technical University, 700050 Iasi (Romania)

2010-08-04T23:59:59.000Z

11

Covariance Analysis of Gamma Ray Spectra  

SciTech Connect (OSTI)

The covariance method exploits fluctuations in signals to recover information encoded in correlations which are usually lost when signal averaging occurs. In nuclear spectroscopy it can be regarded as a generalization of the coincidence technique. The method can be used to extract signal from uncorrelated noise, to separate overlapping spectral peaks, to identify escape peaks, to reconstruct spectra from Compton continua, and to generate secondary spectral fingerprints. We discuss a few statistical considerations of the covariance method and present experimental examples of its use in gamma spectroscopy.

Trainham, R.; Tinsley, J.

2013-01-01T23:59:59.000Z

12

Covariant Photon Quantization in the SME  

E-Print Network [OSTI]

The Gupta Bleuler quantization procedure is applied to the SME photon sector. A direct application of the method to the massless case fails due to an unavoidable incompleteness in the polarization states. A mass term can be included into the photon lagrangian to rescue the quantization procedure and maintain covariance.

Colladay, Don

2013-01-01T23:59:59.000Z

13

Covariant Photon Quantization in the SME  

E-Print Network [OSTI]

The Gupta Bleuler quantization procedure is applied to the SME photon sector. A direct application of the method to the massless case fails due to an unavoidable incompleteness in the polarization states. A mass term can be included into the photon lagrangian to rescue the quantization procedure and maintain covariance.

Don Colladay

2013-09-23T23:59:59.000Z

14

Modern applications of covariant density functional theory  

E-Print Network [OSTI]

Modern applications of Covariant Density Functional Theory (CDFT) are discussed. First we show a systematic investigation of fission barriers in actinide nuclei within constraint relativistic mean field theory allowing for triaxial deformations. In the second part we discuss a microscopic theory of quantum phase transitions (QPT) based on the relativistic generator coordinate method.

P. Ring; H. Abusara; A. V. Afanasjev; G. A. Lalazissis; T. Niksic; D. Vretenar

2011-09-19T23:59:59.000Z

15

Modeling covariance structure in unbalanced longitudinal data  

E-Print Network [OSTI]

CHAPTER I INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1 II A REVIEW OF MODELING COVARIANCE MATRICES WITH MODIFIED CHOLESKY DECOMPOSITION . . . . . . 5 2.1 Modified Cholesky Decomposition . . . . . . . . . . . . . . 5 2.2 Fixed... Linear Mixed Models . . . . . . . . . . . . . 14 2.6 Linear Mixed-Effects Models: Balanced Longitudinal Data 15 III FIXED-EFFECTS MODELS WITH UNBALANCED LON- GITUDINAL DATA . . . . . . . . . . . . . . . . . . . . . . . . 19 3.1 Introduction...

Chen, Min

2009-05-15T23:59:59.000Z

16

GARCH Process with Persistent Covariates Heejoon Han1  

E-Print Network [OSTI]

GARCH Process with Persistent Covariates Heejoon Han1 RMI Working Paper No. 08/01 Submitted or nearly integrated, covariate in the standard GARCH(1,1) model. First, we establish the asymptotic a relevant persistent covariate in the GARCH(1,1) process. Moreover, the kurtosis of the model is randomly

Chaudhuri, Sanjay

17

Decoherence rates for Galilean covariant dynamics  

E-Print Network [OSTI]

We introduce a measure of decoherence for a class of density operators. For Gaussian density operators in dimension one it coincides with an index used by Morikawa (1990). Spatial decoherence rates are derived for three large classes of the Galilean covariant quantum semigroups introduced by Holevo. We also characterize the relaxation to a Gaussian state for these dynamics and give a theorem for the convergence of the Wigner function to the probability distribution of the classical analog of the process.

Jeremy Clark

2008-04-02T23:59:59.000Z

18

Sequential Covariance Calculation for Exoplanet Image Processing  

E-Print Network [OSTI]

Direct imaging of exoplanets involves the extraction of very faint signals from highly noisy data sets, with noise that often exhibits significant spatial, spectral and temporal correlations. As a results, a large number of post-processing algorithms have been developed in order to optimally decorrelate the signal from the noise. In this paper, we explore four such closely related algorithms, all of which depend heavily on the calculation of covariances between large data sets of imaging data. We discuss the similarities and differences between these methods, and demonstrate how the use sequential calculation techniques can significantly improve their computational efficiencies.

Savransky, Dmitry

2015-01-01T23:59:59.000Z

19

AFCI-2.0 Library of Neutron Cross Section Covariances  

SciTech Connect (OSTI)

Neutron cross section covariance library has been under development by BNL-LANL collaborative effort over the last three years. The primary purpose of the library is to provide covariances for the Advanced Fuel Cycle Initiative (AFCI) data adjustment project, which is focusing on the needs of fast advanced burner reactors. The covariances refer to central values given in the 2006 release of the U.S. neutron evaluated library ENDF/B-VII. The preliminary version (AFCI-2.0beta) has been completed in October 2010 and made available to the users for comments. In the final 2.0 release, covariances for a few materials were updated, in particular new LANL evaluations for {sup 238,240}Pu and {sup 241}Am were adopted. BNL was responsible for covariances for structural materials and fission products, management of the library and coordination of the work, while LANL was in charge of covariances for light nuclei and for actinides.

Herman, M.; Herman,M.; Oblozinsky,P.; Mattoon,C.; Pigni,M.; Hoblit,S.; Mughabghab,S.F.; Sonzogni,A.; Talou,P.; Chadwick,M.B.; Hale.G.M.; Kahler,A.C.; Kawano,T.; Little,R.C.; Young,P.G.

2011-06-26T23:59:59.000Z

20

EMPIRE ULTIMATE EXPANSION: RESONANCES AND COVARIANCES.  

SciTech Connect (OSTI)

The EMPIRE code system is being extended to cover the resolved and unresolved resonance region employing proven methodology used for the production of new evaluations in the recent Atlas of Neutron Resonances. Another directions of Empire expansion are uncertainties and correlations among them. These include covariances for cross sections as well as for model parameters. In this presentation we concentrate on the KALMAN method that has been applied in EMPIRE to the fast neutron range as well as to the resonance region. We also summarize role of the EMPIRE code in the ENDF/B-VII.0 development. Finally, large scale calculations and their impact on nuclear model parameters are discussed along with the exciting perspectives offered by the parallel supercomputing.

HERMAN,M.; MUGHABGHAB, S.F.; OBLOZINSKY, P.; ROCHMAN, D.; PIGNI, M.T.; KAWANO, T.; CAPOTE, R.; ZERKIN, V.; TRKOV, A.; SIN, M.; CARSON, B.V.; WIENKE, H. CHO, Y.-S.

2007-04-22T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

Covariant Spectator Theory: Foundations and Applications A Mini-Review of the Covariant Spectator Theory  

SciTech Connect (OSTI)

We provide a short overview of the Covariant Spectator Theory and its applications. The basic ideas are introduced through the example of a {phi}{sup 4}-type theory. High-precision models of the two-nucleon interaction are presented and the results of their use in calculations of properties of the two- and three-nucleon systems are discussed. A short summary of applications of this framework to other few-body systems is also presented.

Alfred Stadler, Franz Gross

2010-10-01T23:59:59.000Z

22

The importance of covariance in nuclear data uncertainty propagation studies  

SciTech Connect (OSTI)

A study has been undertaken to investigate what proportion of the uncertainty propagated through plutonium critical assembly calculations is due to the covariances between the fission cross section in different neutron energy groups. The uncertainties on k{sub eff} calculated show that the presence of covariances between the cross section in different neutron energy groups accounts for approximately 27-37% of the propagated uncertainty due to the plutonium fission cross section. This study also confirmed the validity of employing the sandwich equation, with associated sensitivity and covariance data, instead of a Monte Carlo sampling approach to calculating uncertainties for linearly varying systems. (authors)

Benstead, J. [AWE Plc, Aldermaston, Berkshire (United Kingdom)

2012-07-01T23:59:59.000Z

23

Covariant density functional theory for antimagnetic rotation  

E-Print Network [OSTI]

Following the previous letter on the first microscopic description of the antimagnetic rotation (AMR) in 105Cd, a systematic investigation and detailed analysis for the AMR band in the frame-work of tilted axis cranking (TAC) model based on covariant density functional theory are carried out. After performing the microscopic and self-consistentTAC calculations with an given density functional, the configuration for the observed AMR band in 105Cd is obtained from the single-particle Routhians. With the configuration thus obtained, the tilt angle for a given rotational frequency is determined self-consistently by minimizing the total Routhian with respect to the tilt angle. In such a way, the energy spectrum, total angular momenta, kinetic and dynamic moments of inertia, and the B(E2) values for the AMR band in 105Cd are calculated. Good agreement with the data is found. By investigating microscopically the contributions from neutrons and protons to the total angular momentum, the "two-shears-like" mechanism in the AMR band is clearly illus-trated. Finally, the currents leading to time-odd mean fields in the Dirac equation are presented and discussed in detail. It is found that they are essentially determined by the valence particles and/or holes. Their spatial distribution and size depend onthe specific single-particle orbitals and the rotational frequency.

P. W. Zhao; J. Peng; H. Z. Liang; P. Ring; J. Meng

2012-05-04T23:59:59.000Z

24

Generalized Covariant Gyrokinetic Dynamics of Magnetoplasmas  

SciTech Connect (OSTI)

A basic prerequisite for the investigation of relativistic astrophysical magnetoplasmas, occurring typically in the vicinity of massive stellar objects (black holes, neutron stars, active galactic nuclei, etc.), is the accurate description of single-particle covariant dynamics, based on gyrokinetic theory (Beklemishev et al., 1999-2005). Provided radiation-reaction effects are negligible, this is usually based on the assumption that both the space-time metric and the EM fields (in particular the magnetic field) are suitably prescribed and are considered independent of single-particle dynamics, while allowing for the possible presence of gravitational/EM perturbations driven by plasma collective interactions which may naturally arise in such systems. The purpose of this work is the formulation of a generalized gyrokinetic theory based on the synchronous variational principle recently pointed out (Tessarotto et al., 2007) which permits to satisfy exactly the physical realizability condition for the four-velocity. The theory here developed includes the treatment of nonlinear perturbations (gravitational and/or EM) characterized locally, i.e., in the rest frame of a test particle, by short wavelength and high frequency. Basic feature of the approach is to ensure the validity of the theory both for large and vanishing parallel electric field. It is shown that the correct treatment of EM perturbations occurring in the presence of an intense background magnetic field generally implies the appearance of appropriate four-velocity corrections, which are essential for the description of single-particle gyrokinetic dynamics.

Cremaschini, C. [Department of Astronomy, University of Trieste, Trieste (Italy); Tessarotto, M. [Department of Mathematics and Informatics, University of Trieste, Trieste (Italy); Consortium of Magneto-fluid-dynamics, University of Trieste, Trieste (Italy); Nicolini, P. [Department of Mathematics and Informatics, University of Trieste, Trieste (Italy); Beklemishev, A. [Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)

2008-12-31T23:59:59.000Z

25

AFCI-2.0 Neutron Cross Section Covariance Library  

SciTech Connect (OSTI)

The cross section covariance library has been under development by BNL-LANL collaborative effort over the last three years. The project builds on two covariance libraries developed earlier, with considerable input from BNL and LANL. In 2006, international effort under WPEC Subgroup 26 produced BOLNA covariance library by putting together data, often preliminary, from various sources for most important materials for nuclear reactor technology. This was followed in 2007 by collaborative effort of four US national laboratories to produce covariances, often of modest quality - hence the name low-fidelity, for virtually complete set of materials included in ENDF/B-VII.0. The present project is focusing on covariances of 4-5 major reaction channels for 110 materials of importance for power reactors. The work started under Global Nuclear Energy Partnership (GNEP) in 2008, which changed to Advanced Fuel Cycle Initiative (AFCI) in 2009. With the 2011 release the name has changed to the Covariance Multigroup Matrix for Advanced Reactor Applications (COMMARA) version 2.0. The primary purpose of the library is to provide covariances for AFCI data adjustment project, which is focusing on the needs of fast advanced burner reactors. Responsibility of BNL was defined as developing covariances for structural materials and fission products, management of the library and coordination of the work; LANL responsibility was defined as covariances for light nuclei and actinides. The COMMARA-2.0 covariance library has been developed by BNL-LANL collaboration for Advanced Fuel Cycle Initiative applications over the period of three years, 2008-2010. It contains covariances for 110 materials relevant to fast reactor R&D. The library is to be used together with the ENDF/B-VII.0 central values of the latest official release of US files of evaluated neutron cross sections. COMMARA-2.0 library contains neutron cross section covariances for 12 light nuclei (coolants and moderators), 78 structural materials and fission products, and 20 actinides. Covariances are given in 33-energy groups, from 10?5 eV to 19.6 MeV, obtained by processing with LANL processing code NJOY using 1/E flux. In addition to these 110 files, the library contains 20 files with nu-bar covariances, 3 files with covariances of prompt fission neutron spectra (238,239,240-Pu), and 2 files with mu-bar covariances (23-Na, 56-Fe). Over the period of three years several working versions of the library have been released and tested by ANL and INL reactor analysts. Useful feedback has been collected allowing gradual improvements of the library. In addition, QA system was developed to check basic properties and features of the whole library, allowing visual inspection of uncertainty and correlations plots, inspection of uncertainties of integral quantities with independent databases, and dispersion of cross sections between major evaluated libraries. The COMMARA-2.0 beta version of the library was released to ANL and INL reactor analysts in October 2010. The final version, described in the present report, was released in March 2011.

Herman, M.; Herman, M; Oblozinsky, P.; Mattoon, C.M.; Pigni, M.; Hoblit, S.; Mughabghab, S.F.; Sonzogni, A.; Talou, P.; Chadwick, M.B.; Hale, G.M.; Kahler, A.C.; Kawano, T.; Little, R.C.; Yount, P.G.

2011-03-01T23:59:59.000Z

26

Regularized Algebraic Nets for General Covariant QFT on Differentiable Manifolds  

E-Print Network [OSTI]

Quantum general relativity may be considered as generally covariant QFT on differentiable manifolds, without any a priori metric structure. The kinematically covariance group acts by general diffeomorphisms on the manifold and by automorphisms on the isotonic net of *-algebras encoding the QFT, while the algebra of observables is covariant under the dynamical subgroup of the general diffeomorphism group. Here, I focus on an algebraic implementation of the dynamical subgroup of dilations. Introducing an small and large scale cutoffs algebraically, their usual a priori conflict with general covariance is avoided. Thereby, a commutant duality between the minimal and maximal algebra is proposed. This allows to extract the modular structure, which is again related to the dilations.

M. Rainer

1997-05-30T23:59:59.000Z

27

Generalized covariation and extended Fukushima decompositions for Banach valued processes.  

E-Print Network [OSTI]

Generalized covariation and extended Fukushima decompositions for Banach valued processes corresponding results when B = C([-, 0]) and X = X(·). This will consitute a significant Fukushima decomposition random variables, Malliavin calculus, Generalized Fukushima decomposition. LUISS Guido Carli - Libera

Paris-Sud XI, Université de

28

Low-Fidelity Covariances: Neutron Cross Section Covariance Estimates for 387 Materials  

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

"Covariance data are provided for radiative capture (or (n,ch.p.) for light nuclei), elastic scattering (or total for some actinides), inelastic scattering, (n,2n) reactions, fission and nubars over the energy range from 10(-5{super}) eV to 20 MeV. The library contains 387 files including almost all (383 out of 393) materials of the ENDF/B-VII.0. Absent are data for (7{super})Li, (232{super})Th, (233,235,238{super})U and (239{super})Pu as well as (223,224,225,226{super})Ra, while (nat{super})Zn is replaced by (64,66,67,68,70{super})Zn."[http://www.nndc.bnl.gov/lowfi/index.jsp?z=7

29

Application of Covariances to Fast Reactor Core Analysis  

SciTech Connect (OSTI)

In the present paper, the current status of covariance applications to fast reactor analysis and design is summarized with actual examples. The covariance applications are classified into three fields. First, covariances are used to quantify the uncertainty of nuclear core parameters such as criticality, control rod worth, reaction rate ratio, power distribution, sodium void reactivity, etc. The special features of the Japanese case are to include both the burnup-related parameters such as burnup reactivity loss or fuel composition changes, and the temperature-related parameter, that is, the Doppler reactivity. Second, covariances are used to select the important nuclides, reactions and energy ranges which are dominant to the uncertainty of core parameters, and to give nuclear scientists recommendations to improve the accuracy of the data. Finally, covariances are used to improve the accuracy of core design values by adopting the integral data such as the critical experiments and the power reactor operation data. The way toward improvement is classified into the conventional E/C (Experiment/Calculation) bias method and the more comprehensive cross section adjustment based on the Bayesian theorem and the generalized least square method. In Japan, an adjusted group-constant set, ADJ2000R, is now being used in the design work for future fast reactors.

Ishikawa, M. [Japan Atomic Energy Agency (JAEA), O-arai, Ibaraki, 311-1393 (Japan)], E-mail: ishikawa.makoto@jaea.go.jp

2008-12-15T23:59:59.000Z

30

Geodesic deviation at higher orders via covariant bitensors  

E-Print Network [OSTI]

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

Justin Vines

2014-07-25T23:59:59.000Z

31

Addressing spectroscopic quality of covariant density functional theory  

E-Print Network [OSTI]

The spectroscopic quality of covariant density functional theory has been accessed by analyzing the accuracy and theoretical uncertainties in the description of spectroscopic observables. Such analysis is first presented for the energies of the single-particle states in spherical and deformed nuclei. It is also shown that the inclusion of particle-vibration coupling improves the description of the energies of predominantly single-particle states in medium and heavy-mass spherical nuclei. However, the remaining differences between theory and experiment clearly indicate missing physics and missing terms in covariant energy density functionals. The uncertainties in the predictions of the position of two-neutron drip line sensitively depend on the uncertainties in the prediction of the energies of the single-particle states. On the other hand, many spectroscopic observables in well deformed nuclei at ground state and finite spin only weakly depend on the choice of covariant energy density functional.

A. V. Afanasjev

2014-09-17T23:59:59.000Z

32

Neutron Resonance Parameters and Covariance Matrix of 239Pu  

SciTech Connect (OSTI)

In order to obtain the resonance parameters in a single energy range and the corresponding covariance matrix, a reevaluation of 239Pu was performed with the code SAMMY. The most recent experimental data were analyzed or reanalyzed in the energy range thermal to 2.5 keV. The normalization of the fission cross section data was reconsidered by taking into account the most recent measurements of Weston et al. and Wagemans et al. A full resonance parameter covariance matrix was generated. The method used to obtain realistic uncertainties on the average cross section calculated by SAMMY or other processing codes was examined.

Derrien, Herve [ORNL; Leal, Luiz C [ORNL; Larson, Nancy M [ORNL

2008-08-01T23:59:59.000Z

33

Covariance Tapering for Interpolation of Large Spatial Datasets  

E-Print Network [OSTI]

Covariance Tapering for Interpolation of Large Spatial Datasets Reinhard FURRER, Marc G. GENTON results. An application to a large climatological precipitation dataset is presented as a concrete-based methods make it possible to analyze and fit large spatial datasets in a high level Reinhard Furrer

Genton, Marc G.

34

Covariance Tapering for Likelihood Based Estimation in Large Spatial Datasets  

E-Print Network [OSTI]

Covariance Tapering for Likelihood Based Estimation in Large Spatial Datasets Cari Kaufman, Mark the likelihood can be computationally infeasible for large datasets, requiring O(n3) calculations for a dataset and Marshall, 1984). However, evaluating the likelihood requires order n3 operations for a dataset of size n

35

A representation theorem for stochastic processes with separable covariance functions,  

E-Print Network [OSTI]

), will often require five or ten dimensions--sometimes more. Covariance functions, being non-negative definite in section 2. Section 2 also presents the restrictions on the conditional and marginal correlation functions itself. Section 3 provides a complete answer to this question, giving a representation theorem

36

Covariance matrices for use in criticality safety predictability studies  

SciTech Connect (OSTI)

Criticality predictability applications require as input the best available information on fissile and other nuclides. In recent years important work has been performed in the analysis of neutron transmission and cross-section data for fissile nuclei in the resonance region by using the computer code SAMMY. The code uses Bayes method (a form of generalized least squares) for sequential analyses of several sets of experimental data. Values for Reich-Moore resonance parameters, their covariances, and the derivatives with respect to the adjusted parameters (data sensitivities) are obtained. In general, the parameter file contains several thousand values and the dimension of the covariance matrices is correspondingly large. These matrices are not reported in the current evaluated data files due to their large dimensions and to the inadequacy of the file formats. The present work has two goals: the first is to calculate the covariances of group-averaged cross sections from the covariance files generated by SAMMY, because these can be more readily utilized in criticality predictability calculations. The second goal is to propose a more practical interface between SAMMY and the evaluated files. Examples are given for {sup 235}U in the popular 199- and 238-group structures, using the latest ORNL evaluation of the {sup 235}U resonance parameters.

Derrien, H.; Larson, N.M.; Leal, L.C.

1997-09-01T23:59:59.000Z

37

Common Component Analysis for Multiple Covariance Matrices Huahua Wang  

E-Print Network [OSTI]

as on two real stock market datasets, where major financial events can be visualized in low dimensions while preserving as much of the "energy" or variance as possible. The problem can be solved if the covariance matrices span different subspaces. Exam- ples include stock market data where financial shocks

Boley, Daniel

38

NOAA Technical Memorandum ERL GLERL-85 COVARIANCE PROPERTIES OF ANNUAL NET BASIN SUPPLIES  

E-Print Network [OSTI]

NOAA Technical Memorandum ERL GLERL-85 COVARIANCE PROPERTIES OF ANNUAL NET BASIN SUPPLIES ........................................................................................................ 2 2.2 Net Basin Supplies . . . . . . . . . . . 4 Table lb.--Lag-Zero Cross Covariances and Cross Correlations Among Great Lakes Annual Connecting

39

E-Print Network 3.0 - adapting covariance propagation Sample...  

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

Investigation of the Sensitivity of Ensemble-Based Kalman Filters to Covariance... of the background error covariance matrix in an ensemble-based Kalman filter (EnKF). In...

40

Recent progress in the study of fission barriers in covariant density functional theory  

E-Print Network [OSTI]

Recent progress in the study of fission barriers of actinides and superheavy nuclei within covariant density functional theory is overviewed.

A. V. Afanasjev; H. Abusara; P. Ring

2012-05-10T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

Rank-r latent models for cross-covariance Jacob A. Wegelin  

E-Print Network [OSTI]

Rank-r latent models for cross-covariance Jacob A. Wegelin Thomas S. Richardson University of Gaussian rank-r latent models for cross-covariance. We show by construction that any variance-covariance matrix for the ob- served variables induced by rank-r reduced-rank regression can be induced by a rank

Washington at Seattle, University of

42

Covariant phase space, constraints, gauge and the Peierls formula  

E-Print Network [OSTI]

It is well known that both the symplectic structure and the Poisson brackets of classical field theory can be constructed directly from the Lagrangian in a covariant way, without passing through the non-covariant canonical Hamiltonian formalism. This is true even in the presence of constraints and gauge symmetries. These constructions go under the names of the covariant phase space formalism and the Peierls bracket. We review both of them, paying more careful attention, than usual, to the precise mathematical hypotheses that they require, illustrating them in examples. Also an extensive historical overview of the development of these constructions is provided. The novel aspect of our presentation is a significant expansion and generalization of an elegant and quite recent argument by Forger & Romero showing the equivalence between the resulting symplectic and Poisson structures without passing through the canonical Hamiltonian formalism as an intermediary. We generalize it to cover theories with constraints and gauge symmetries and formulate precise sufficient conditions under which the argument holds. These conditions include a local condition on the equations of motion that we call hyperbolizability, and some global conditions of cohomological nature. The details of our presentation may shed some light on subtle questions related to the Poisson structure of gauge theories and their quantization.

Igor Khavkine

2014-02-07T23:59:59.000Z

43

Nuclear response theory with multiphonon coupling in a covariant framework  

E-Print Network [OSTI]

Background: Nuclear excited states within a wide range of excitation energies are formally described by the linear response theory. Besides its conventional formulation within the quasiparticle random phase approximation (QRPA) representing excited states as two correlated quasiparticles (2q), there exist extensions for 4q configurations. Such extended approaches are quite successful in the description of gross properties of nuclear spectra, however, accounting for many of their fine features requires further extension of the configuration space. Purpose: This work aims at the development of an approach which is capable of such an extension as well as of reproducing and predicting fine spectral properties, which are of special interest at low energies. Method: The method is based on the covariant density functional theory and time blocking approximation, which is extended for couplings between quasiparticles and multiphonon excitations. Results: The covariant multiphonon response theory is developed and adopted for nuclear structure calculations in medium-mass and heavy nuclei. The equations are formulated in both general and coupled forms in the spherical basis. Conclusions: The developed covariant multiphonon response theory represents a new generation of the approaches to nuclear response, which aims at a unified description of both high-frequency collective states and low-energy spectroscopy in medium-mass and heavy nuclei.

Elena Litvinova

2015-04-13T23:59:59.000Z

44

Pion electromagnetic form factor in the Covariant Spectator Theory  

SciTech Connect (OSTI)

The pion electromagnetic form factor at spacelike momentum transfer is calculated in relativistic impulse approximation using the Covariant Spectator Theory. The same dressed quark mass function and the equation for the pion bound-state vertex function as discussed in the companion paper are used for the calculation, together with a dressed quark current that satisfies the Ward-Takahashi identity. The results obtained for the pion form factor are in agreement with experimental data, they exhibit the typical monopole behavior at high momentum transfer and they satisfy some remarkable scaling relations.

Biernat, Elmar P. [CFTP, Institute Superior Tecnico, Lisboa (Portugal); Gross, Franz L. [JLAB, Newport News, VA (United States); Pena, Teresa [CFTP, Institute Superior Tecnico, Lisboa (Portugal); Stadler, Alfred [University of Evora, Lisboa (Portugal)

2014-01-01T23:59:59.000Z

45

Implementation of optimal phase-covariant cloning machines  

E-Print Network [OSTI]

The optimal phase covariant cloning machine (PQCM) broadcasts the information associated to an input qubit into a multi-qubit systems, exploiting a partial a-priori knowledge of the input state. This additional a priori information leads to a higher fidelity than for the universal cloning. The present article first analyzes different experimental schemes to implement the 1->3 PQCM. The method is then generalized to any 1->M machine for odd value of M by a theoretical approach based on the general angular momentum formalism. Finally different experimental schemes based either on linear or non-linear methods and valid for single photon polarization encoded qubits are discussed.

Fabio Sciarrino; Francesco De Martini

2006-09-14T23:59:59.000Z

46

Role of Experiment Covariance in Cross Section Adjustments  

SciTech Connect (OSTI)

This paper is dedicated to the memory of R. D. McKnight, which gave a seminal contribution in establishing methodology and rigorous approach in the evaluation of the covariance of reactor physics integral experiments. His original assessment of the ZPPR experiment uncertainties and correlations has made nuclear data adjustments, based on these experiments, much more robust and reliable. In the present paper it has been shown with some numerical examples the actual impact on an adjustment of accounting for or neglecting such correlations.

Giuseppe Palmiotti; M. Salvatores

2014-06-01T23:59:59.000Z

47

Deformed one-quasiparticle states in covariant density functional theory  

E-Print Network [OSTI]

Systematic investigation of the accuracy of the description of the energies of deformed one-quasiparticle states has been performed in covariant density functional theory in actinide and rare-earth mass regions. The sources of the discrepancies between theory and experiment are analyzed. Although some improvements in the description of ground state configurations and one-quasiparticle spectra can be achieved by better parametrization of the relativistic mean field Lagrangian, the analysis suggests that spectroscopic quality of their description can be achieved only in theoretical framework which takes into account particle-vibration coupling.

A. V. Afanasjev; S. Shawaqfeh

2012-05-10T23:59:59.000Z

48

Lyman Alpha Flux Power Spectrum and Its Covariance  

E-Print Network [OSTI]

We analyze the flux power spectrum and its covariance using simulated Lyman alpha forests. We find that pseudo-hydro techniques are good approximations of hydrodynamical simulations at high redshift. However, the pseudo-hydro techniques fail at low redshift because they are insufficient for characterizing some components of the low-redshift intergalactic medium, notably the warm-hot intergalactic medium. Hence, to use the low-redshift Lyman alpha flux power spectrum to constrain cosmology, one would need realistic hydrodynamical simulations. By comparing one-dimensional mass statistics with flux statistics, we show that the nonlinear transform between density and flux quenches the fluctuations so that the flux power spectrum is much less sensitive to cosmological parameters than the one-dimensional mass power spectrum. The covariance of the flux power spectrum is nearly Gaussian. As such, the uncertainties of the underlying mass power spectrum could still be large, even though the flux power spectrum can be precisely determined from a small number of lines of sight.

Hu Zhan; Romeel Dave; Daniel Eisenstein; Neal Katz

2005-08-10T23:59:59.000Z

49

E-Print Network 3.0 - achieving covariance matrix Sample Search...  

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

Engineering 7 WEAK SIGNAL DETECTION IN HYPERSPECTRAL IMAGERY USING SPARSE MATRIX TRANSFORM (SMT) COVARIANCE ESTIMATION Summary: WEAK SIGNAL DETECTION IN HYPERSPECTRAL IMAGERY...

50

E-Print Network 3.0 - aged prevalence covariates Sample Search...  

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

and Ecology ; Biology and Medicine 3 We have modelled malaria prevalence using satellite data as a covariate, and allowing for spatial correlation. Summary: We have modelled...

51

Rank Transforms and Tests of Interaction for Repeated Measures Experiments with Various Covariance Structures.  

E-Print Network [OSTI]

??The covariance structure of a repeated measures design can be simple or very complicated. In analyzing repeated measures, rank transformations can be an alternative to… (more)

Bryan, Jennifer Joanne

2009-01-01T23:59:59.000Z

52

E-Print Network 3.0 - arranging dirac covariants Sample Search...  

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

Journal of Modern Physics A Summary: -Gordon, Dirac, Pauli) have been derived as geodesic equations written with a quantum-covariant deriva- tive... co- variances by first...

53

Covariant Kinetic Theory with an Application to the Coma Cluster  

E-Print Network [OSTI]

In this paper, we introduce a novel solution to the covariant Landau equation for a pure electron plasma. The method conserves energy and particle number, and reduces smoothly to the Rosenbluth potentials of non-relativistic theory. In addition, we find that a fully relativistic plasma equilibrates in only 1/100th of a Spitzer time--much faster than in the non-relativistic limit--a factor of significant import to situations in which distortions to a Maxwellian distribution are produced by anomalous methods of acceleration. To demonstrate the power of our solution in dealing with hot, astrophysical plasmas, we use this technique to show that one of the currently considered models--continuous stochastic acceleration--for the hard X-ray emission in the Coma cluster actually cannot work because the energy gained by the particles is distributed to the {\\it whole} plasma on a time scale much shorter than that of the acceleration process itself.

Brandon Wolfe; Fulvio Melia

2005-05-02T23:59:59.000Z

54

Particle vibrational coupling in covariant density functional theory  

E-Print Network [OSTI]

A consistent combination of covariant density functional theory (CDFT) and Landau-Migdal Theory of Finite Fermi Systems (TFFS) is presented. Both methods are in principle exact, but Landau-Migdal theory cannot describe ground state properties and density functional theory does not take into account the energy dependence of the self-energy and therefore fails to yield proper single-% particle spectra as well as the coupling to complex configurations in the width of giant resonances. Starting from an energy functional, phonons and their vertices are calculated without any further parameters. They form the basis of particle-vibrational coupling leading to an energy dependence of the self-energy and an induced energy-dependent interaction in the response equation. A subtraction procedure avoids double counting. Applications in doubly magic nuclei and in a chain of superfluid nuclei show excellent agreement with experimental data.

P. Ring; E. Litvinova

2010-06-21T23:59:59.000Z

55

Galilei covariance and Einstein's equivalence principle in quantum reference frames  

E-Print Network [OSTI]

The covariance of the Schr\\"odinger equation under Galilei boosts and the compatibility of nonrelativistic quantum mechanics with Einstein's equivalence principle have been constrained for so long to the existence of a superselection rule which would prevent a quantum particle to be found in superposition states of different masses. In a effort to avoid this expedient, thus allowing for nonrelativistic quantum mechanics to account for unstable particles, recent works have suggested that usual Galilean transformations are inconsistent with the nonrelativistic limit of the Lorentz transformation. Here we approach the issue in a fundamentally different way. Using a formalism of unitary transformations and employing quantum reference frames rather than immaterial coordinate systems, we show that the Schr\\"odinger equation, although form-variant, is fully compatible with the aforementioned principles of relativity.

S. T. Pereira; R. M. Angelo

2014-04-10T23:59:59.000Z

56

Chiral symmetry and ? - ? scattering in the covariant spectator theory  

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

The ? - ? scattering amplitude calculated with a model for the quark-antiquark interaction in the framework of the Covariant Spectator Theory (CST) is shown to satisfy the Adler zero constraint imposed by chiral symmetry. The CST formalism is established in Minkowski space and our calculations are performed in momentum space. We prove that the axial-vector Ward-Takahashi identity is satisfied by our model. Then we show that, similarly to what happens within the Bethe-Salpeter formalism, application of the axial-vector Ward Takahashi identity to the CST ? - ? scattering amplitude allows us to sum the intermediate quark-quark interactions to all orders. The Adler self-consistency zero for ? - ? scattering in the chiral limit emerges as the result for this sum.

Biernat, Elmar P; Pena, M. T.; Ribeiro, J. E.; Stadler, Alfred; Gross, Franz

2014-11-01T23:59:59.000Z

57

Covariance of phenotypically plastic traits induces an adaptive shift in host selection behaviour  

E-Print Network [OSTI]

Covariance of phenotypically plastic traits induces an adaptive shift in host selection behaviour efficiency. In the present study, we investigated covariance of two plastic traits--size at pupation and host; evolution 1. INTRODUCTION Phenotypic plasticity is defined as the ability of an organism to change its

Dukas, Reuven

58

Spectra of empirical auto-covariance matrices R. Kuhn and P. Sollich  

E-Print Network [OSTI]

densities of large sample auto-covariance matrices of stationary stochastic processes at fixed ratio = N the properties of sta- tionary stochastic processes [1], one typically begins by concentrating on low the latter further consists in looking at the auto-covariance matrix obtained by sam- pling the auto

Kühn, Reimer

59

Optimized Cascade of Classifiers for People Detection Using Covariance Malik SOUDED1,2  

E-Print Network [OSTI]

for many applications like people track- ing especially in crowded scenes has motivated many researchesOptimized Cascade of Classifiers for People Detection Using Covariance Features Malik SOUDED1.Souded@digitalbarriers.com Keywords: People detection, Covariance descriptor, LogitBoost. Abstract: People detection on static images

Paris-Sud XI, Université de

60

Exploring and quantifying the `co-variability' of the extremes corresponding to different climate components  

E-Print Network [OSTI]

Exploring and quantifying the `co-variability' of the extremes corresponding to different climate to the fact that there might be moisture-temperature feedback that has further implications on the extremes. Having said, we aim to study how extreme precipitation and temperature co-vary and are determined

Miami, University of

Note: This page contains sample records for the topic "leventis theo covary" 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

Covariance of cross-correlations: towards efficient measures for large-scale structure  

E-Print Network [OSTI]

We study the covariance of the cross-power spectrum of different tracers for the large-scale structure. We develop the counts-in-cells framework for the multi-tracer approach, and use this to derive expressions for the full non-Gaussian covariance matrix. We show, that for the usual auto-power statistic, besides the off-diagonal covariance generated through gravitational mode-coupling, the discreteness of the tracers and their associated sampling distribution can generate strong off-diagonal covariance, and that this becomes the dominant source of covariance as k>>k_f=2 pi/L. On comparison with the derived expressions for the cross-power covariance, we show that the off-diagonal terms can be suppressed, if one cross-correlates a high tracer-density sample with a low one. Taking the effective estimator efficiency to be proportional to the signal-to-noise ratio (SN), we show that, to probe clustering as a function of physical properties of the sample, i.e. cluster mass or galaxy luminosity, then the cross-power approach can out perform the auto-power one by factors of a few. We confront the theory with measurements of the mass-mass, halo-mass, and halo-halo power spectra from a large ensemble of N-body simulations. We show that there is a significant SN advantage to be gained from using the cross-power approach when studying the bias of rare haloes. The analysis is repeated in configuration space and again SN improvement is found. We estimate the covariance matrix for these samples, and find strong off-diagonal contributions. The covariance depends on halo mass, with higher mass samples having stronger covariance. In agreement with theory, we show that the covariance is suppressed for the cross-power. This work points the way towards improved estimators for clustering studies.

Robert E. Smith

2009-06-13T23:59:59.000Z

62

Covariant Spectator Theory of np scattering: Isoscalar interaction currents  

SciTech Connect (OSTI)

Using the Covariant Spectator Theory (CST), one boson exchange (OBE) models have been found that give precision fits to low energy $np$ scattering and the deuteron binding energy. The boson-nucleon vertices used in these models contain a momentum dependence that requires a new class of interaction currents for use with electromagnetic interactions. Current conservation requires that these new interaction currents satisfy a two-body Ward-Takahashi (WT), and using principals of {\\it simplicity\\/} and {\\it picture independence\\/}, these currents can be uniquely determined. The results lead to general formulae for a two-body current that can be expressed in terms of relativistic $np$ wave functions, ${\\it \\Psi}$, and two convenient truncated wave functions, ${\\it \\Psi}^{(2)}$ and $\\widehat {\\it \\Psi}$, which contain all of the information needed for the explicit evaluation of the contributions from the interaction current. These three wave functions can be calculated from the CST bound or scattering state equations (and their off-shell extrapolations). A companion paper uses this formalism to evaluate the deuteron magnetic moment.

Gross, Franz L. [JLAB

2014-06-01T23:59:59.000Z

63

Covariant Spectator Theory of np scattering: Isoscalar interaction currents  

E-Print Network [OSTI]

Using the Covariant Spectator Theory (CST), one boson exchange (OBE) models have been found that give precision fits to low energy np scattering and the deuteron binding energy. The boson-nucleon vertices used in these models contain a momentum dependence that requires a new class of interaction currents for use with electromagnetic interactions. Current conservation requires that these new interaction currents satisfy a two-body Ward-Takahashi identity, and using principals of simplicity and picture independence, these currents can be uniquely determined. The results lead to general formulae for a two-body current that can be expressed in terms of relativistic np wave functions, Psi, and two convenient truncated wave functions, ${\\it \\Psi}^{(2)}$ and $\\widehat {\\it \\Psi}$, which contain all of the information needed for the explicit evaluation of the contributions from the interaction current. These three wave functions can be calculated from the CST bound or scattering state equations (and their off-shell extrapolations). A companion paper uses this formalism to evaluate the deuteron magnetic moment.

Franz Gross

2014-04-06T23:59:59.000Z

64

Highly covariant quantum lattice gas model of the Dirac equation  

E-Print Network [OSTI]

We revisit the quantum lattice gas model of a spinor quantum field theory-the smallest scale particle dynamics is partitioned into unitary collide and stream operations. The construction is covariant (on all scales down to a small length {\\ell} and small time {\\tau} = c {\\ell}) with respect to Lorentz transformations. The mass m and momentum p of the modeled Dirac particle depend on {\\ell} according to newfound relations m = mo cos (2{\\pi}{\\ell}/{\\lambda}) and p = (h/2{\\pi}{\\ell}) sin(2{\\pi}{\\ell}/{\\lambda}), respectively, where {\\lambda} is the Compton wavelength of the modeled particle. These relations represent departures from a relativistically invariant mass and the de Broglie relation-when taken as quantifying numerical errors the model is physically accurate when {\\ell} {\\ll} {\\lambda}. Calculating the vacuum energy in the special case of a massless spinor field, we find that it vanishes (or can have a small positive value) for a sufficiently large wave number cutoff. This is a marked departure from the usual behavior of such a massless field.

Jeffrey Yepez

2011-06-03T23:59:59.000Z

65

Applications of nuclear data covariances to criticality safety and spent fuel characterization  

SciTech Connect (OSTI)

Covariance data computational methods and data used for sensitivity and uncertainty analysis within the SCALE nuclear analysis code system are presented. Applications in criticality safety calculations and used nuclear fuel analysis are discussed.

Williams, Mark L [ORNL] [ORNL; Ilas, Germina [ORNL] [ORNL; Marshall, William BJ J [ORNL] [ORNL; Rearden, Bradley T [ORNL] [ORNL

2014-01-01T23:59:59.000Z

66

Journal of Multivariate Analysis 92 (2005) 186204 Covariate selection for semiparametric hazard  

E-Print Network [OSTI]

partial likelihood--henceforth PPL [16], a backwards elimination covariate selection method [9], Bayesian model averaging [14,15], Bayesian variable selection [8], the lasso method for PPL [17], and nonconcave PPL [7]. Large sample

McKeague, Ian

67

Eddy covariance flux measurements of pollutant gases in urban Mexico City  

E-Print Network [OSTI]

Eddy covariance (EC) flux measurements of the atmosphere/surface exchange of gases over an urban area are a direct way to improve and evaluate emissions inventories, and, in turn, to better understand urban atmospheric ...

Velasco, Erik

68

Econometrica, Vol. 72, No. 3 (May, 2004), 885925 ECONOMETRIC ANALYSIS OF REALIZED COVARIATION: HIGH  

E-Print Network [OSTI]

Econometrica, Vol. 72, No. 3 (May, 2004), 885­925 ECONOMETRIC ANALYSIS OF REALIZED COVARIATION by the UK's ESRC through the grant "High Frequency Financial Econometrics Based upon Power Variation." All

Wolfe, Patrick J.

69

Brain covariance selection: better individual functional connectivity models using population prior  

E-Print Network [OSTI]

Brain covariance selection: better individual functional connectivity models using population prior bertrand.thirion@inria.fr Abstract Spontaneous brain activity, as observed in functional neuroimaging, has been shown to display reproducible structure that expresses brain architecture and car- ries markers

Paris-Sud XI, Université de

70

The manifestly covariant Aharonov-Bohm effect in terms of the 4D fields  

E-Print Network [OSTI]

In this paper it is presented a manifestly covariant formulation of the Aharonov-Bohm (AB) phase difference for the magnetic AB effect . This covariant AB phase is written in terms of the Faraday 2-form F and using the decomposition of F in terms of the electric and magnetic fields as four-dimensional (4D) geometric quantities. It is shown that there is a static electric field outside a stationary solenoid with resistive conductor carrying steady current, which causes that the AB phase difference in the magnetic AB effect may be determined by the electric part of the covariant expression, i.e. by the local influence of the 4D electric field and not, as generally accepted,in terms of nonzero vector potential.

Tomislav Ivezic

2014-11-21T23:59:59.000Z

71

PRELIMINARY CROSS SECTION AND NU-BAR COVARIANCES FOR WPEC SUBGROUP 26  

SciTech Connect (OSTI)

We report preliminary cross section covariances developed for the WPEC Subgroup 26 for 45 out of 52 requested materials. The covariances were produced in 15- and 187-group representations as follows: (1) 36 isotopes ({sup 16}O, {sup 19}F, {sup 23}Na, {sup 27}Al, {sup 28}Si, {sup 52}Cr, {sup 56,56}Fe, {sup 58}Ni, {sup 90,91,92,94}Zr, {sup 166,167,168,170}Er, {sup 206,207,208}Pb, {sup 209}Bi, {sup 233,234,236}U, {sup 237}Np, {sup 238,240,241,242}Pu, {sup 241,242m,243}Am, {sup 242,243,244,245}Cm) were evaluated using the BNL-LANL methodology. For the thermal region and the resolved and unresolved resonance regions, the methodology has been based on the Atlas-Kalman approach, in the fast neutron region the Empire-Kalman method has been used; (2) 6 isotopes ({sup 155,156,157,158,160}Gd and {sup 232}Th) were taken from ENDF/B-VII.0; and (3) 3 isotopes ({sup 1}H, {sup 238}U and {sup 239}Pu) were taken from JENDL-3.3. For 6 light nuclei ({sup 4}He, {sup 6,7}Li, {sup 9}Be, {sup 10}B, {sup 12}C), only partial cross section covariance results were obtained, additional work is needed and they do not report the results here. Likewise, the cross section covariances for {sup 235}U, which they recommend to take from JENDL-3.3, will be included once the multigroup processing is successfully completed. Covariances for the average number of neutrons per fission, total {nu}-bar, are provided for 10 actinides identified as priority by SG26. Further work is needed to resolve some of the issues and to produce covariances for the full set of 52 materials.

ROCHMAN,D.

2007-01-31T23:59:59.000Z

72

First integrals of motion in a gauge covariant framework, Killing-Maxwell system and quantum anomalies  

SciTech Connect (OSTI)

Hidden symmetries in a covariant Hamiltonian framework are investigated. The special role of the Stackel-Killing and Killing-Yano tensors is pointed out. The covariant phase-space is extended to include external gauge fields and scalar potentials. We investigate the possibility for a higher-order symmetry to survive when the electromagnetic interactions are taken into account. Aconcrete realization of this possibility is given by the Killing-Maxwell system. The classical conserved quantities do not generally transfer to the quantized systems producing quantum gravitational anomalies. As a rule the conformal extension of the Killing vectors and tensors does not produce symmetry operators for the Klein-Gordon operator.

Visinescu, M., E-mail: mvisin@theory.nipne.ro [National Institute for Physics and Nuclear Engineering, Department of Theoretical Physics (Romania)

2012-10-15T23:59:59.000Z

73

Covariance analysis of finite temperature density functional theory: symmetric nuclear matter  

E-Print Network [OSTI]

We study symmetric nuclear matter at finite temperature, with particular emphasis on the liquid-gas phase transition. We use a standard covariance analysis to propagate statistical uncertainties from the density functional to the thermodynamic properties. We use four functionals with known covariance matrices to obtain as wide a set of results as possible. Our findings suggest that thermodynamical properties are very well constrained by fitting data at zero temperature. The propagated statistical errors in the liquid-gas phase transition parameters are relatively small.

A. Rios; X. Roca-Maza

2014-08-21T23:59:59.000Z

74

Exploiting Covariate Similarity in Sparse Regression via the Pairwise Elastic Net  

E-Print Network [OSTI]

, the Elastic Net can yield a sparse esti- mate with more than n non-zero weights (Efron et al., 2004). One canExploiting Covariate Similarity in Sparse Regression via the Pairwise Elastic Net Alexander Lorbert- tion called the Pairwise Elastic Net is pro- posed. Like the Elastic Net, it simultane- ously performs

Blei, David M.

75

Exploiting Covariate Similarity in Sparse Regression via the Pairwise Elastic Net  

E-Print Network [OSTI]

. Furthermore, un- like the Lasso, the Elastic Net can yield a sparse esti- mate with more than n non-zero477 Exploiting Covariate Similarity in Sparse Regression via the Pairwise Elastic Net Alexander to regression regulariza- tion called the Pairwise Elastic Net is pro- posed. Like the Elastic Net, it simultane

Low, Steven H.

76

State covariances and the matrix completion problem Yongxin Chen, Mihailo R. Jovanovic, and Tryphon T. Georgiou  

E-Print Network [OSTI]

by the University of Minnesota Initiative for Renewable Energy and the Environment under Early Career Award RC-0014 processes can be effectively used to explain available data. Index Terms-- Convex optimization, low-rank approx- imation, nuclear norm regularization, state covariances, structured matrix completion problems

Georgiou, Tryphon T.

77

A full-scale approximation of covariance functions for large spatial data sets  

E-Print Network [OSTI]

A full-scale approximation of covariance functions for large spatial data sets Huiyan Sang in spatial statistics but face tremendous computational challenges for very large data sets. The model fitting and spatial prediction of such models typically require O(n3 ) operations for a data set of size n

Huang, Jianhua

78

To be submitted to ApJ A Formalism for Covariant Polarized Radiative Transport by Ray  

E-Print Network [OSTI]

To be submitted to ApJ A Formalism for Covariant Polarized Radiative Transport by Ray Tracing that the transport equation in vacuo is kµ µN = 0. We show that this is equivalent to Broderick & Blandford (2004)'s a procedure for solving the polarized radiative transfer equation in a curved spacetime. Other possible

Gammie, Charles F.

79

Multi-loop Decentralized PID Control Based on Covariance Control Criteria: an LMI Approach  

E-Print Network [OSTI]

Multi-loop Decentralized PID Control Based on Covariance Control Criteria: an LMI Approach Xin, Alberta, Canada T6G2G6 Abstract PID control is well known and widely applied in industry and many design PID control for multivariable processes to meet certain objectives simultaneously is still

Alberta, University of

80

Beta diversity and latitude in North American mammals: testing the hypothesis of covariation  

E-Print Network [OSTI]

Beta diversity and latitude in North American mammals: testing the hypothesis of covariation Pilar Rodri´guez and He´ctor T. Arita Rodri´guez, P. and Arita, H. T. 2004. Beta diversity and latitude of the pattern remain insufficiently explored, including the effect of scales and the role of beta diversity

Nacional Autónoma de México, Universidad

Note: This page contains sample records for the topic "leventis theo covary" 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

WEAK SIGNAL DETECTION IN HYPERSPECTRAL IMAGERY USING SPARSE MATRIX TRANSFORM (SMT) COVARIANCE ESTIMATION  

E-Print Network [OSTI]

Sciences Los Alamos, NM 87544 ABSTRACT Many detection algorithms in hyperspectral image analysis, from well Laboratory. 1. INTRODUCTION The covariance matrix is the cornerstone of multivariate sta- tistical analysis and Computer Engineering West Lafayette, IN 47907 Los Alamos National Laboratory Space and Remote Sensing

82

Covariation of coastal water temperature and microbial pollution at interannual to tidal periods  

E-Print Network [OSTI]

Covariation of coastal water temperature and microbial pollution at interannual to tidal periods, California, USA Daniel B. Lluch-Cota Centro de Investigaciones Biologicas del Noroeste, La Paz, Mexico-period cooling are coincident with elevated levels of microbial pollution in the surf zone. This relationship can

Winant, Clinton D.

83

A Nonparametric Matching Method for Covariate Adjustment with Application to Economic Evaluation  

E-Print Network [OSTI]

A Nonparametric Matching Method for Covariate Adjustment with Application to Economic Evaluation of propensity score and Mahalanobis distance matching. We apply Genetic Matching to an economic evaluation and nonparametric methods; observational stud- ies; health economic evaluation #12;1 Introduction Progress has been

Sekhon, Jasjeet S.

84

Brain covariance selection: better individual functional connectivity models using population prior  

E-Print Network [OSTI]

Brain covariance selection: better individual functional connectivity models using population prior.thirion@inria.fr Abstract Spontaneous brain activity, as observed in functional neuroimaging, has been shown to display reproducible structure that expresses brain architecture and car- ries markers of brain pathologies

85

Nanjing, July 26, 2008 Defeng Sun 1 Calibrating Least Squares Covariance Matrix Problems  

E-Print Network [OSTI]

Nanjing, July 26, 2008 Defeng Sun 1 ' & $ % Calibrating Least Squares Covariance Matrix Problems with Equality and Inequality Constraints Defeng Sun Department of Mathematics National University of Singapore to Professor Bingsheng He #12;Nanjing, July 26, 2008 Defeng Sun 2 ' & $ % Let Sn be the set of all real

Sun, Defeng

86

Statistical Methods for Degradation Data with Dynamic Covariates Information and an Application to Outdoor  

E-Print Network [OSTI]

inverter that are used in solar panel arrays can gather and transmit information on the output of power and environmental variables such as, the loss of light output from an LED array, the decrease of power output, which we refer to as dynamic covariate information. For example, even a small device like a power

87

Submitted to the Annals of Statistics FLEXIBLE COVARIANCE ESTIMATION IN GRAPHICAL  

E-Print Network [OSTI]

models have proven to be excellent tools for the analysis of complex high-dimensional data where examples where we explore frequentist risk prop- erties and the efficacy of graphs in the estimation of these estimators give substantial risk reductions compared to the sample covariance estimator S in small sample

West, Mike

88

The role of dilations in diffeomorphism covariant algebraic quantum field theory  

E-Print Network [OSTI]

The quantum analogue of general relativistic geometry should be implementable on smooth manifolds without an a priori metric structure, the kinematical covariance group acting by diffeomorphisms. Here I approach quantum gravity (QG) in the view of constructive, algebraic quantum field theory (QFT). Comparing QG with usual QFT, the algebraic approach clarifies analogies and peculiarities. As usual, an isotonic net of *-algebras is taken to encode the quantum field operators. For QG, the kinematical covariance group acts via diffeomorphisms on the open sets of the manifold, and via algebraic isomorphisms on the algebras. In general, the algebra of observables is covariant only under a (dynamical) subgroup of the general diffeomorphism group. After an algebraic implementation of the dynamical subgroup of dilations, small and large scale cutoffs may be introduced algebraically. So the usual a priori conflict of cutoffs with general covariance is avoided. Even more, these cutoffs provide a natural local cobordism for topological quantum field theory. A new commutant duality between the minimal and maximal algebra allows to extract the modular structure from the net of algebras. The outer modular isomorphisms are then again related to dilations, which (under certain conditions) may provide a notion of time.

M. Rainer

1999-04-02T23:59:59.000Z

89

Smart Doorplate WOLFGANG TRUMLER, FARUK BAGCI, JAN PETZOLD, THEO UNGERER  

E-Print Network [OSTI]

}@informatik.uni-augsburg.de Abstract: This paper introduces the vision of smart doorplates within an office building. The doorplates. Introduction Smart buildings represent an important application area of ubiquitous computing that includes context-aware and networked smart appliances. Most smart building technologies are developed for smart

Ungerer, Theo

90

Smart Doorplate WOLFGANG TRUMLER, FARUK BAGCI, JAN PETZOLD, THEO UNGERER  

E-Print Network [OSTI]

}@informatik.uni­augsburg.de Abstract: This paper introduces the vision of smart doorplates within an office building. The doorplates. Introduction Smart buildings represent an important application area of ubiquitous computing that includes context­aware and networked smart appliances. Most smart building technologies are developed for smart

Ungerer, Theo

91

Predictable nonwandering localization of covariant Lyapunov vectors and cluster synchronization in scale-free networks of chaotic maps  

E-Print Network [OSTI]

Covariant Lyapunov vectors for scale-free networks of Henon maps are highly localized. We revealed two mechanisms of the localization related to full and phase cluster synchronization of network nodes. In both cases the localization nodes remain unaltered in course of the dynamics, i.e., the localization is nonwandering. Moreover this is predictable: the localization nodes are found to have specific dynamical and topological properties and they can be found without computing of the covariant vectors. This is an example of explicit relations between the system topology, its phase space dynamics, and the associated tangent space dynamics of covariant Lyapunov vectors.

Pavel V. Kuptsov; Anna V. Kuptsova

2014-06-22T23:59:59.000Z

92

Separation of correlated astrophysical sources using multiple-lag data covariance matrices  

E-Print Network [OSTI]

This paper deals with a source separation strategy based on second-order statistics, namely, on data covariance matrices estimated at several lags. In general, ``blind'' approaches to source separation do not assume any knowledge on the mixing operator; however, any prior information about the possible structure of the mixing operator can improve the solution. Unlike ICA blind separation approaches, where mutual independence between the sources is assumed, our method only needs to constrain second-order statistics, and is effective even if the original sources are significantly correlated. Besides the mixing matrix, our strategy is also capable to evaluate the source covariance functions at several lags. Moreover, once the mixing parameters have been identified, a simple deconvolution can be used to estimate the probability density functions of the source processes. To benchmark our algorithm, we used a database that simulates the one expected from the instruments that will operate onboard ESA's Planck Survey...

Bedini, L; Salerno, E; Baccigalupi, C; Kuruouglu, E E; Tonazzini, A

2004-01-01T23:59:59.000Z

93

Proposal for the utilization of the total cross section covariances and its correlations with channel reactions for sensitivity and uncertainty analysis  

SciTech Connect (OSTI)

An alternate method for the estimation of the global uncertainty on criticality, using the total cross section and its covariances, is proposed. Application of the method with currently available covariance data leads to an unrealistically large prediction of the global uncertainty on criticality. New covariances for total cross section and individual reactions are proposed. Analysis with the proposed covariance matrices is found to result in a global uncertainty for criticality consistent with the traditional method. Recommendations are made to evaluators for providing total cross section covariances. (authors)

Sabouri, P.; Bidaud, A. [Labratoire de Physique Subatomique et de Cosmologie, CNRS-IN2P3/UJF/INPG, Grenoble (France); Dabiran, S.; Buijs, A. [Dept. of Engineering Physics, McMaster Univ., Hamilton, ON (Canada)

2012-07-01T23:59:59.000Z

94

Exploitation of Geometric Occlusion and Covariance Spectroscopy in a Gamma Sensor Array  

SciTech Connect (OSTI)

The National Security Technologies, LLC, Remote Sensing Laboratory has recently used an array of six small-footprint (1-inch diameter by 3-inch long) cylindrical crystals of thallium-doped sodium iodide scintillators to obtain angular information from discrete gamma ray–emitting point sources. Obtaining angular information in a near-field measurement for a field-deployed gamma sensor is a requirement for radiological emergency work. Three of the sensors sit at the vertices of a 2-inch isosceles triangle, while the other three sit on the circumference of a 3-inch-radius circle centered in this triangle. This configuration exploits occlusion of sensors, correlation from Compton scattering within a detector array, and covariance spectroscopy, a spectral coincidence technique. Careful placement and orientation of individual detectors with reference to other detectors in an array can provide improved angular resolution for determining the source position by occlusion mechanism. By evaluating the values of, and the uncertainties in, the photopeak areas, efficiencies, branching ratio, peak area correction factors, and the correlations between these quantities, one can determine the precise activity of a particular radioisotope from a mixture of radioisotopes that have overlapping photopeaks that are ordinarily hard to deconvolve. The spectral coincidence technique, often known as covariance spectroscopy, examines the correlations and fluctuations in data that contain valuable information about radiation sources, transport media, and detection systems. Covariance spectroscopy enhances radionuclide identification techniques, provides directional information, and makes weaker gamma-ray emission—normally undetectable by common spectroscopic analysis—detectable. A series of experimental results using the concept of covariance spectroscopy are presented.

Mukhopadhyay, Sanjoy; Maurer, Richard; Wolff, Ronald; Mitchell, Stephen; Guss, Paul; Trainham, Clifford

2013-09-01T23:59:59.000Z

95

0v{beta}{beta} decay: theoretical nuclear matrix elements and their covariances  

SciTech Connect (OSTI)

Within the quasiparticle random phase approximation (QRPA), the covariances associated to the nuclear matrix elements (NME) of neutrinoless double beta decay (0v{beta}{beta}) are estimated. It is shown that correlated NME uncertainties play an important role in the comparison of 0v{beta}{beta} decay rates for different nuclei, both in the standard case of light Majorana neutrino exchange, and in nonstandard physics cases.

Lisi, Eligio [Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Via Orabona 4, 70126 Bari (Italy)

2009-11-09T23:59:59.000Z

96

A covariant variational approach to Yang-Mills Theory at finite temperatures  

E-Print Network [OSTI]

We extend the covariant variational approach for SU(N) Yang-Mills theory in Landau gauge to non-zero temperatures. The renormalization of the zero-temperature case is revisited and it is shown that the same counterterms are sufficient to render the low-order Green's function finite at non-zero temperature. We compute the ghost and gluon propagator numerically and show that it agrees in all qualitative respects with the results of high-precision lattice calculations.

Markus Quandt; Hugo Reinhardt

2015-03-24T23:59:59.000Z

97

ORNL Resolved Resonance Covariance Generation for ENDF/B-VII.1  

SciTech Connect (OSTI)

Resonance-parameter covariance matrix (RPCM) evaluations in the resolved resonance regionwere done at the Oak Ridge National Laboratory (ORNL) for the chromium isotopes, titanium isotopes, 19F, 58Ni, 60Ni, 35Cl, 37Cl, 39K, 41K, 55Mn, 233U, 235U, 238U, and 239Pu using the computer code SAMMY. The retroactive approach of the code SAMMY was used to generate the RPCMs for 233U. For 235U, the approach used for covariance generation was similar to the retroactive approach with the distinction that real experimental data were used as opposed to data generated from the resonance parameters. RPCMs for 238U and 239Pu were generated together with the resonance parameter evaluations. The RPCMs were then converted in the ENDF format using the FILE32 representation. Alternatively, for computer storage reasons, the FILE32 was converted in the FILE33 cross section covariance matrix (CSCM). Both representations were processed using the computer code PUFF-IV. This paper describes the procedures used to generate the RPCM and CSCM in the resonance region for ENDF/B-VII.1. The impact of data uncertainty in nuclear reactor benchmark calculations is also presented.

Leal, Luiz C. [ORNL; Guber, Klaus H. [ORNL; Wiarda, Dorothea [ORNL] [ORNL; Arbanas, Goran [ORNL] [ORNL; Derrien, Herve [ORNL] [ORNL; Sayer, Royce O. [ORNL; Larson, Nancy M. [ORNL; Dunn, Michael E. [ORNL

2012-12-01T23:59:59.000Z

98

Covariant Differential Identities and Conservation Laws in Metric-Torsion Theories of Gravitation. I. General Consideration  

E-Print Network [OSTI]

Arbitrary diffeomorphically invariant metric-torsion theories of gravity are considered. It is assumed that Lagrangians of such theories contain derivatives of field variables (tensor densities of arbitrary ranks and weights) up to a second order only. The generalized Klein-Noether methods for constructing manifestly covariant identities and conserved quantities are developed. Manifestly covariant expressions are constructed without including auxiliary structures like a background metric. In the Riemann-Cartan space, the following \\emph{manifestly generally covariant results} are presented: (a) The complete generalized system of differential identities (the Klein-Noether identities) is obtained. (b) The generalized currents of three types depending on an arbitrary vector field displacements are constructed: they are the canonical Noether current, symmetrized Belinfante current and identically conserved Hilbert-Bergmann current. In particular, it is stated that the symmetrized Belinfante current does not depend on divergences in the Lagrangian. (c) The generalized boundary Klein theorem (third Noether theorem) is proved. (d) The construction of the generalized superpotential is presented in details, and questions related to its ambiguities are analyzed.

Robert R. Lompay; Alexander N. Petrov

2013-07-01T23:59:59.000Z

99

Pairwise covariance adds little to secondary structure prediction but improves the prediction of non-canonical local structure  

SciTech Connect (OSTI)

Amino acid sequence probability distributions, or profiles, have been used successfully to predict secondary structure and local structure in proteins. Profile models assume the statistical independence of each position in the sequence, but the energetics of protein folding is better captured in a scoring function that is based on pairwise interactions, like a force field. I-sites motifs are short sequence/structure motifs that populate the protein structure database due to energy-driven convergent evolution. Here we show that a pairwise covariant sequence model does not predict alpha helix or beta strand significantly better overall than a profile-based model, but it does improve the prediction of certain loop motifs. The finding is best explained by considering secondary structure profiles as multivariant, all-or-none models, which subsume covariant models. Pairwise covariance is nonetheless present and energetically rational. Examples of negative design are present, where the covariances disfavor non-native structures. Measured pairwise covariances are shown to be statistically robust in cross-validation tests, as long as the amino acid alphabet is reduced to nine classes. We present an updated I-sites local structure motif library and web server that provide sequence covariance information for all types of local structure in globular proteins.

Bystroff, Christopher; Webb-Robertson, Bobbie-Jo M.

2009-05-06T23:59:59.000Z

100

On Weyl channels being covariant with respect to the maximum commutative group of unitaries  

E-Print Network [OSTI]

We investigate the Weyl channels being covariant with respect to the maximum commutative group of unitary operators. This class includes the quantum depolarizing channel and the "two-Pauli" channel as well. Then, we show that our estimation of the output entropy for a tensor product of the phase damping channel and the identity channel based upon the decreasing property of the relative entropy allows to prove the additivity conjecture for the minimal output entropy for the quantum depolarizing channel in any prime dimesnsion and for the "two Pauli" channel in the qubit case.

G. G. Amosov

2006-08-10T23:59:59.000Z

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101

Answer to Question 55: Are there pictorial examples that distinguish covariant and contravariant vectors?  

E-Print Network [OSTI]

We present pictorial means of distinguishing contravariant vectors (or simply vectors) from covariant vectors (or linear forms). When one depicts vector as the directed segment, then the pictorial image of a linear form is a family of equidistant parallel planes with an arrow joining the neighbouring planes and showing the direction of increase of the form. First of these planes is the linear subspace of dimension two on which the linear form gives value zero. Several examples of physical quantities are given which are naturally vectors, and others which are naturally linear forms.

Bernard Jancewicz

1998-07-17T23:59:59.000Z

102

Covariant nucleon wave function with S, D, and P-state components  

SciTech Connect (OSTI)

Expressions for the nucleon wave functions in the covariant spectator theory (CST) are derived. The nucleon is described as a system with a off-mass-shell constituent quark, free to interact with an external probe, and two spectator constituent quarks on their mass shell. Integrating over the internal momentum of the on-mass-shell quark pair allows us to derive an effective nucleon wave function that can be written only in terms of the quark and diquark (quark-pair) variables. The derived nucleon wave function includes contributions from S, P and D-waves.

Franz Gross, G. Ramalho, M. T. Pena

2012-05-01T23:59:59.000Z

103

Inefficient eight-port homodyne detection and covariant phase space observables  

E-Print Network [OSTI]

We consider the quantum optical eight-port homodyne detection scheme in the case that each of the associated photon detectors is assigned with a different quantum efficiency. We give a mathematically rigorous and strictly quantum mechanical proof of the fact that the measured observable (positive operator measure) in the high-amplitude limit is a smearing of the covariant phase space observable related to the ideal measurement. The result is proved for an arbitary parameter field. Furthermore, we investigate some properties of the measured observable. In particular, we show that the state distinguishing power of the observable is not affected by detector inefficiencies.

Pekka Lahti; Juha-Pekka Pellonpää; Jussi Schultz

2010-04-28T23:59:59.000Z

104

On Weyl channels being covariant with respect to the maximum commutative group of unitaries  

SciTech Connect (OSTI)

We investigate the Weyl channels being covariant with respect to the maximum commutative group of unitary operators. This class includes the quantum depolarizing channel and the 'two-Pauli' channel as well. Then, we show that our estimation of the output entropy for a tensor product of the phase damping channel and the identity channel based upon the decreasing property of the relative entropy allows to prove the additivity conjecture for the minimal output entropy for the quantum depolarizing channel in any prime dimension and for the two-Pauli channel in the qubit case.

Amosov, Grigori G. [Department of Higher Mathematics, Moscow Institute of Physics and Technology, Dolgoprudny 141700 (Russian Federation)

2007-01-15T23:59:59.000Z

105

Separation of correlated astrophysical sources using multiple-lag data covariance matrices  

E-Print Network [OSTI]

This paper deals with a source separation strategy based on second-order statistics, namely, on data covariance matrices estimated at several lags. In general, ``blind'' approaches to source separation do not assume any knowledge on the mixing operator; however, any prior information about the possible structure of the mixing operator can improve the solution. Unlike ICA blind separation approaches, where mutual independence between the sources is assumed, our method only needs to constrain second-order statistics, and is effective even if the original sources are significantly correlated. Besides the mixing matrix, our strategy is also capable to evaluate the source covariance functions at several lags. Moreover, once the mixing parameters have been identified, a simple deconvolution can be used to estimate the probability density functions of the source processes. To benchmark our algorithm, we used a database that simulates the one expected from the instruments that will operate onboard ESA's Planck Surveyor Satellite to measure the CMB anisotropies all over the celestial sphere. The assumption was made that the emission spectra of the galactic foregrounds can be parametrised, thus reducing the number of unknowns for system identification to the number of the foreground radiations. We performed separation in several sky patches, featuring different levels of galactic contamination to the CMB, and assuming several noise levels, including the ones derived from the Planck specifications.

L. Bedini; D. Herranz; E. Salerno; C. Baccigalupi; E. E. Kuruouglu; A. Tonazzini

2004-07-06T23:59:59.000Z

106

Covariant formulation of spatially non-symmetric kinetic equilibria in magnetized astrophysical plasmas  

SciTech Connect (OSTI)

Astrophysical plasmas in the surrounding of compact objects and subject to intense gravitational and electromagnetic fields are believed to give rise to relativistic regimes. Theoretical and observational evidences suggest that magnetized plasmas of this type are collisionless and can persist for long times (e.g., with respect to a distant observer, coordinate, time), while exhibiting geometrical structures characterized by the absence of well-defined spatial symmetries. In this paper, the problem is posed whether such configurations can correspond to some kind of kinetic equilibrium. The issue is addressed from a theoretical perspective in the framework of a covariant Vlasov statistical description, which relies on the method of invariants. For this purpose, a systematic covariant variational formulation of gyrokinetic theory is developed, which holds without requiring any symmetry condition on the background fields. As a result, an asymptotic representation of the relativistic particle magnetic moment is obtained from its formal exact solution, in terms of a suitably defined invariant series expansion parameter (perturbative representation). On such a basis, it is shown that spatially non-symmetric kinetic equilibria can actually be determined, an example being provided by Gaussian-like distributions. As an application, the physical mechanisms related to the occurrence of a non-vanishing equilibrium fluid 4-flow are investigated.

Cremaschini, Claudio, E-mail: claudiocremaschini@gmail.com; Stuchlík, Zden?k [Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezru?ovo nám.13, CZ-74601 Opava (Czech Republic)] [Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezru?ovo nám.13, CZ-74601 Opava (Czech Republic); Tessarotto, Massimo [Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezru?ovo nám.13, CZ-74601 Opava (Czech Republic) [Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezru?ovo nám.13, CZ-74601 Opava (Czech Republic); Department of Mathematics and Geosciences, University of Trieste, Via Valerio 12, 34127 Trieste (Italy)

2014-05-15T23:59:59.000Z

107

Analytical study on the Sunyaev-Zeldovich effect for clusters of galaxies. II. Comparison of covariant formalisms  

SciTech Connect (OSTI)

We study a covariant formalism for the Sunyaev-Zeldovich effects developed in the previous papers by the present authors, and derive analytic expressions for the redistribution functions in the Thomson approximation. We also explore another covariant formalism recently developed by Poutanen and Vurm. We show that the two formalisms are mathematically equivalent in the Thomson approximation which is fully valid for the cosmic microwave background photon energies. The present finding will establish a theoretical foundation for the analysis of the Sunyaev-Zeldovich effects for the clusters of galaxies.

Nozawa, Satoshi; Kohyama, Yasuharu; Itoh, Naoki [Josai Junior College, 1-1 Keyakidai, Sakado-shi, Saitama, 350-0295 (Japan); Department of Physics, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo, 102-8554 (Japan)

2010-11-15T23:59:59.000Z

108

Covariant spectator theory for the electromagnetic three-nucleon form factors: Complete impulse approximation  

SciTech Connect (OSTI)

We present the first calculations of the electromagnetic form factors of 3He and 3H within the framework of the Covariant Spectator Theory (CST). This first exploratory study concentrates on the sensitivity of the form factors to the strength of the scalar meson-nucleon off-shell coupling, known from previous studies to have a strong influence on the three-body binding energy. Results presented here were obtained using the complete impulse approximation (CIA), which includes contributions of relativistic origin that appear as two-body corrections in a non-relativistic framework, such as ?Z-graphs?, but omits other two and three-body currents. We compare our results to non-relativistic calculations augmented by relativistic corrections of O(v/c)2.

Alexandre Pinto, SÂ ergio; Stadler, Alfred; Gross, Franz

2009-01-01T23:59:59.000Z

109

Covariant spectator theory for the electromagnetic three-nucleon form factors: Complete impulse approximation  

SciTech Connect (OSTI)

We present the first calculations of the electromagnetic form factors of 3He and 3H within the framework of the Covariant Spectator Theory (CST). This first exploratory study concentrates on the sensitivity of the form factors to the strength of the scalar meson-nucleon off-shell coupling, known from previous studies to have a strong influence on the three-body binding energy. Results presented here were obtained using the complete impulse approximation (CIA), which includes contributions of relativistic origin that appear as two-body corrections in a non-relativistic framework, such as #28;Z-graphs#29;, but omits other two and three-body currents. We compare our results to non-relativistic calculations augmented by relativistic corrections of O(v/c)2.

Sergio Alexandre Pinto, Alfred Stadler, Franz Gross

2009-05-01T23:59:59.000Z

110

Covariant spectator theory for the electromagnetic three-nucleon form factors: Complete impulse approximation  

SciTech Connect (OSTI)

We present the first calculations of the electromagnetic form factors of {sup 3}He and {sup 3}H within the framework of the Covariant Spectator Theory (CST). This first exploratory study concentrates on the sensitivity of the form factors to the strength of the scalar meson-nucleon off-shell coupling, known from previous studies to have a strong influence on the three-body binding energy. Results presented here were obtained using the complete impulse approximation (CIA), which includes contributions of relativistic origin that appear as two-body corrections in a nonrelativistic framework, such as 'Z-graphs', but omits other two and three-body currents. We compare our results to nonrelativistic calculations augmented by relativistic corrections of O(v/c){sup 2}.

Pinto, Sergio Alexandre; Stadler, Alfred; Gross, Franz [Centro de Fisica Nuclear da Universidade de Lisboa, 1649-003 Lisboa, Portugal and Departamento de Fisica da Universidade de Evora, 7000-671 Evora (Portugal); Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States) and College of William and Mary, Williamsburg, Virginia 23187 (United States)

2009-05-15T23:59:59.000Z

111

Generally covariant model of a scalar field with high frequency dispersion and the cosmological horizon problem  

E-Print Network [OSTI]

Short distance structure of spacetime may show up in the form of high freqency dispersion. Although such dispersion is not locally Lorentz invariant, we show in a scalar field model how it can nevertheless be incorporated into a generally covariant metric theory of gravity provided the locally preferred frame is dynamical. We evaluate the resulting energy-momentum tensor and compute its expectation value for a quantum field in a thermal state. The equation of state differs at high temperatures from the usual one, but not by enough to impact the problems of a hot big bang cosmology. We show that a superluminal dispersion relation can solve the horizon problem via superluminal equilibration, however it cannot do so while remaining outside the Planck regime unless the dispersion relation is artificially chosen to have a rather steep dependence on wavevector.

Ted Jacobson; David Mattingly

2000-09-11T23:59:59.000Z

112

Four dimensional quantum gravity: The covariant path integral and quantization of the conformal factor  

SciTech Connect (OSTI)

After first reviewing the issue of vacuum energy (the cosmological constant problem) in the Einstein theory, the covariant path integral for gravity in four dimensions is constructed. The problem of vacuum energy requires determining the correct ground state of the quantum theory of gravity, and as such is an infrared problem, arising prior to and independently of the physics of the Planck scale. It is addressed in these lectures by studying the infrared fixed point of the low energy effective action of the conformal factor generated by the quantum trace anomaly in four dimensions. The infrared fixed point of this effective theory describes a conformally invariant phase of gravity with a vanishing effective cosmological term.

Mottola, E.

1993-03-01T23:59:59.000Z

113

Four dimensional quantum gravity: The covariant path integral and quantization of the conformal factor  

SciTech Connect (OSTI)

After first reviewing the issue of vacuum energy (the cosmological constant problem) in the Einstein theory, the covariant path integral for gravity in four dimensions is constructed. The problem of vacuum energy requires determining the correct ground state of the quantum theory of gravity, and as such is an infrared problem, arising prior to and independently of the physics of the Planck scale. It is addressed in these lectures by studying the infrared fixed point of the low energy effective action of the conformal factor generated by the quantum trace anomaly in four dimensions. The infrared fixed point of this effective theory describes a conformally invariant phase of gravity with a vanishing effective cosmological term.

Mottola, E.

1993-01-01T23:59:59.000Z

114

Octupole deformation and Ra puzzle in reflection asymmetric covariant density functional theory  

E-Print Network [OSTI]

Reflection asymmetric covariant density functional theory(CDFT) based on the point-coupling interaction is established on a two-center harmonic-oscillator basis and applied to investigate the Ra puzzle, i.e., the anomalous enhancement of the residual proton-neutron interactions for Ra isotopes around N=135. The octupole deformation and shape evolution in the Ra and Rn isotopes are examined in the potential energy surfaces in(beta2, beta3) plane by the constrained reflection asymmetric calculations. The residual proton-neutron interactions extracted from the double difference of the binding energies for Ra isotopes are compared with the data as well as the axial and the triaxial calculations. It is found that the octupole deformation is responsible for the Ra puzzle in the microscopic CDFT.

L. F. Yu; P. W. Zhao; S. Q. Zhang; J. Meng

2012-11-03T23:59:59.000Z

115

Localized form of Fock terms in nuclear covariant density functional theory  

E-Print Network [OSTI]

In most of the successful versions of covariant density functional theory in nuclei, the Fock terms are not included explicitly, which leads to local functionals and forms the basis of their widespread applicability at present. However, it has serious consequences for the description of Gamow-Teller resonances (GTR) and spin-dipole resonances (SDR) which can only be cured by adding further phenomenological parameters. Relativistic Hartree-Fock models do not suffer from these problems. They can successfully describe the GTR and SDR as well as the isovector part of the Dirac effective mass without any additional parameters. However, they are non-local and require considerable numerical efforts. By the zero-range reduction and the Fierz transformation, a new method is proposed to take into account the Fock terms in local functionals, which retains the simplicity of conventional models and provides proper descriptions of the spin-isospin channels and the Dirac masses.

Haozhao Liang; Pengwei Zhao; Peter Ring; Xavier Roca-Maza; Jie Meng

2012-07-26T23:59:59.000Z

116

Isospin coupling-channel decomposition of nuclear symmetry energy in covariant density functional theory  

E-Print Network [OSTI]

The isospin coupling-channel decomposition of the potential energy density functional is carried out within the covariant density functional theory, and their isospin and density dependence in particular the influence on the symmetry energy is studied. It is found that both isospin-singlet and isospin-triplet components of the potential energy play the dominant role in deciding the symmetry energy, especially when the Fock diagram is introduced. The results illustrate a quite different mechanism to the origin of the symmetry energy from the microscopic Brueckner-Hartree-Fock theory, and demonstrate the importance of the Fork diagram in the CDF theory, especially from the isoscalar mesons, in the isospin properties of the in-medium nuclear force at high density.

Qian Zhao; Bao Yuan Sun; Wen Hui Long

2014-11-23T23:59:59.000Z

117

Magnetic rotations in 198Pb and 199Pb within covariant density functional theory  

E-Print Network [OSTI]

Well-known examples of shears bands in the nuclei 198Pb and 199Pb are investigated within tilted axis cranking relativistic mean-field theory. Energy spectra, the relation between spin and rotational frequency, deformation parameters and reduced $M1$ and $E2$ transition probabilities are calculated. The results are in good agreement with available data and with calculations based on the phenomenological pairing plus-quadrupole-quadrupole tilted-axis cranking model. It is shown that covariant density functional theory provides a successful microscopic and fully self-consistent description of magnetic rotation in the Pb region showing the characteristic properties as the shears mechanism and relatively large B(M1) transitions decreasing with increasing spin.

L. F. Yu; P. W. Zhao; S. Q. Zhang; P. Ring; J. Meng

2012-02-28T23:59:59.000Z

118

Nuclear matrix elements in neutrinoless double beta decay: beyond mean-field covariant density functional theory  

E-Print Network [OSTI]

We report a systematic study of nuclear matrix elements (NMEs) in neutrinoless double-beta decays with state-of-the-art beyond mean-field covariant density functional theory. The dynamic effects of particle-number and angular-momentum conservations as well as quadrupole shape fluctuations are taken into account with projections and generator coordinate method for both initial and final nuclei. The full relativistic transition operator is adopted to calculate the NMEs which are found to be consistent with the results of previous beyond non-relativistic mean-field calculation based on a Gogny force with the exception of $^{150}$Nd. Our study shows that the total NMEs can be well approximated by the pure axial-vector coupling term, the calculation of which is computationally much cheaper than that of full terms.

J. M. Yao; L. S. Song; K. Hagino; P. Ring; J. Meng

2014-10-23T23:59:59.000Z

119

Nuclear matrix elements in neutrinoless double beta decay: beyond mean-field covariant density functional theory  

E-Print Network [OSTI]

We report a systematic study of nuclear matrix elements (NMEs) in neutrinoless double-beta decays with state-of-the-art beyond mean-field covariant density functional theory. The dynamic effects of particle-number and angular-momentum conservations as well as quadrupole shape fluctuations are taken into account with projections and generator coordinate method for both initial and final nuclei. The full relativistic transition operator is adopted to calculate the NMEs which are found to be consistent with the results of previous beyond non-relativistic mean-field calculation based on a Gogny force with the exception of $^{150}$Nd. Our study shows that the total NMEs can be well approximated by the pure axial-vector coupling term, the calculation of which is computationally much cheaper than that of full terms.

Yao, J M; Hagino, K; Ring, P; Meng, J

2014-01-01T23:59:59.000Z

120

Covariant Lyapunov Vectors of a Quasi-geostrophic Baroclinic Model: Analysis of Instabilities and Feedbacks  

E-Print Network [OSTI]

The classical approach for studying atmospheric variability is based on defining a background state and studying the linear stability of the small fluctuations around such a state. Weakly non-linear theories can be constructed using higher order expansions terms. While these methods have undoubtedly great value for elucidating the relevant physical processes, they are unable to follow the dynamics of a turbulent atmosphere. We provide a first example of extension of the classical stability analysis to a non-linearly evolving atmosphere. The so-called covariant Lyapunov vectors (CLVs) provide a covariant basis describing the directions of exponential expansion and decay of perturbations to the non-linear trajectory of the flow. We use such a formalism to re-examine the basic barotropic and baroclinic processes of the atmosphere with a quasi-geostrophic beta-plane two-layer model in a periodic channel driven by a forced meridional temperature gradient $\\Delta T$. We explore three settings of $\\Delta T$, representative of relatively weak turbulence, well-developed turbulence, and intermediate conditions. We construct the Lorenz energy cycle for each CLV describing the energy exchanges with the background state. A positive baroclinic conversion rate is a necessary but not a sufficient condition of instability. Barotropic instability is present only for few very unstable CLVs for large values of $\\Delta T$. Following classical necessary conditions for barotropic/baroclinic instability, we find a clear relationship between the properties of the eddy fluxes of a CLV and its instability properties. There is support for the conjecture that the CLVs with positive baroclinic conversion potentially form a reduced basis of the trajectory similar to approaches using empirical orthogonal functions.

Sebastian Schubert; Valerio Lucarini

2014-10-06T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

ENDF/B-VII.1 Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Yields and Decay Data  

E-Print Network [OSTI]

testing of the ENDF/B-VII.1 library is provided for a variety of quantities: For nuclear criticalityENDF/B-VII.1 Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia 11 Nuclear Research and Consultancy Group, P

Danon, Yaron

122

Methane Emissions from a Small Wind Shielded Lake Determined by Eddy Covariance, Flux Chambers, Anchored Funnels, and Boundary  

E-Print Network [OSTI]

Methane Emissions from a Small Wind Shielded Lake Determined by Eddy Covariance, Flux Chambers of methane, held to be responsible for 18% of the radiative forcing, to the atmosphere. Periods of lake but potentially one of the most important periods for methane emissions. We studied methane emissions using four

Wehrli, Bernhard

123

Title: Optimal Replacement in the Proportional Hazards Model with semi-Markovian Covariate Process and Continuous Monitoring  

E-Print Network [OSTI]

1 Title: Optimal Replacement in the Proportional Hazards Model with semi-Markovian Covariate Process and Continuous Monitoring Index terms--Optimal replacement, proportional hazards model, semi-Markov process, threshold replacement policy, sensitivity analysis SUMMARY This paper deals with the optimal

Ryan, Sarah M.

124

II - Conservation of Gravitational Energy Momentum and Poincare-Covariant Classical Theory of Gravitation  

E-Print Network [OSTI]

Viewing gravitational energy-momentum $p_G^\\mu$ as equal by observation, but different in essence from inertial energy-momentum $p_I^\\mu$ naturally leads to the gauge theory of volume-preserving diffeormorphisms of an inner Minkowski space ${\\bf M}^{\\sl 4}$. To extract its physical content the full gauge group is reduced to its Poincar\\'e subgroup. The respective Poincar\\'e gauge fields, field strengths and Poincar\\'e-covariant field equations are obtained and point-particle source currents are derived. The resulting set of non-linear field equations coupled to point matter is solved in first order resulting in Lienard-Wiechert-like potentials for the Poincar\\'e fields. After numerical identification of gravitational and inertial energy-momentum Newton's inverse square law for gravity in the static non-relativistic limit is recovered. The Weak Equivalence Principle in this approximation is proven to be valid and spacetime geometry in the presence of Poincar\\'e fields is shown to be curved. Finally, the gravitational radiation of an accelerated point particle is calulated.

C. Wiesendanger

2011-03-02T23:59:59.000Z

125

Deriving Daytime Variables From the AmeriFlux Standard Eddy Covariance Data Set  

SciTech Connect (OSTI)

A gap-filled, quality assessed eddy covariance dataset has recently become available for the AmeriFluxnetwork. This dataset uses standard processing and produces commonly used science variables. This shared dataset enables robust comparisons across different analyses. Of course, there are many remaining questions. One of those is how to define 'during the day' which is an important concept for many analyses. Some studies have used local time ?for example 9am to 5pm; others have used thresholds on photosynthetic active radiation (PAR). A related question is how to derive quantities such as the Bowen ratio. Most studies compute the ratio of the averages of the latent heat (LE) and sensible heat (H). In this study, we use different methods of defining 'during the day' for GPP, LE, and H. We evaluate the differences between methods in two ways. First, we look at a number of statistics of GPP. Second, we look at differences in the derived Bowen ratio. Our goal is not science per se, but rather informatics in support of the science.

Ingen, Catharine van; Agarwal, Deborah A; Humphrey, Marty; Li, Jie

2008-12-06T23:59:59.000Z

126

Computation of Large Covariance Matrices by SAMMY on Graphical Processing Units and Multicore CPUs  

SciTech Connect (OSTI)

Computational power of Graphical Processing Units and multicore CPUs was harnessed by the nuclear data evaluation code SAMMY to speed up computations of large Resonance Parameter Covariance Matrices (RPCMs). This was accomplished by linking SAMMY to vendor-optimized implementations of the matrix-matrix multiplication subroutine of the Basic Linear Algebra Library to compute the most time-consuming step. The U-235 RPCM computed previously using a triple-nested loop was re-computed using the NVIDIA implementation of the subroutine on a single Tesla Fermi Graphical Processing Unit, and also using the Intel's Math Kernel Library implementation on two different multicore CPU systems. A multiplication of two matrices of dimensions 16,000 x 20,000 that had previously taken days, took approximately one minute on the GPU. Similar performance was achieved on a dual six-core CPU system. The magnitude of the speed-up suggests that these, or similar, combinations of hardware and libraries may be useful for large matrix operations in SAMMY. Uniform interfaces of standard linear algebra libraries make them a promising candidate for a programming framework of a new generation of SAMMY for the emerging heterogeneous computing platforms.

Arbanas, Goran [ORNL; Dunn, Michael E [ORNL; Wiarda, Dorothea [ORNL

2011-01-01T23:59:59.000Z

127

Symmetric energy-momentum tensor: the Abraham form and the explicitly covariant formula  

E-Print Network [OSTI]

We compare the explicitly covariant 4-dimensional formula, recently proposed by V.P.\\ Makarov and S.A.\\ Rukhadze [Phys. Usp. {\\bf 52} 937 (2011)] for symmetric energy-momentum tensor of electromagnetic field in a medium, and the energy-momentum tensor derived by Abraham in the 3-dimensional vector form. It is shown that these two objects coincide only on the physical configuration space $\\overline \\Gamma $, formed by the field vectors and the velocity of the medium, which satisfy the constitutive relations. It should be emphasized that the 3-dimensional vector formulae for the components of the energy-momentum tensor were obtained by Abraham only on $\\overline \\Gamma $, and the task of their extension to the whole unconditional configuration space $\\Gamma$ was not posed. In order to accomplish the comparison noted above we derive the Makarov-Rukhadze formula a new by another method, namely, by generalizing the Abraham reasoning. The comparison conducted enables one to treat the Makarov-Rukhadze formula as a u...

Nesterenko, V V

2015-01-01T23:59:59.000Z

128

Nonaxial-octupole Y_{32} correlations in N = 150 isotones from multidimensional constrained covariant density functional theories  

E-Print Network [OSTI]

The non-axial reflection-asymmetric $\\beta_{32}$ shape in some transfermium nuclei with N=150, namely $^{246}$Cm, $^{248}$Cf, $^{250}$Fm, and $^{252}$No are investigated with multidimensional constrained covariant density functional theories. By using the density-dependent point coupling covariant density functional theory with the parameter set DD-PC1 in the particle-hole channel, it is found that, for the ground states of $^{248}$Cf and $^{250}$Fm, the non-axial octupole deformation parameter $\\beta_{32} > 0.03$ and the energy gain due to the $\\beta_{32}$ distortion is larger than 300 keV. In $^{246}$Cm and $^{252}$No, shallow $\\beta_{32}$ minima are found. The occurrence of the non-axial octupole $\\beta_{32}$ correlations is mainly from a pair of neutron orbitals $[734]9/2$ ($\

Jie Zhao; Bing-Nan Lu; En-Guang Zhao; Shan-Gui Zhou

2012-09-28T23:59:59.000Z

129

Solar system tests and interpretation of gauge field and Newtonian prepotential in general covariant Ho?ava-Lifshitz gravity  

E-Print Network [OSTI]

We study spherically symmetric, stationary vacuum configurations in general covariant theory (U(1) extension) of Ho\\v{r}ava-Lifshitz gravity with the projectability condition and an arbitrary coupling constant $\\lambda$, and obtain all the solutions in closed forms. If the gauge field $A$ and the Newtonian prepotential $\\varphi$ do not directly couple to matter fields, the theory is inconsistent with solar system tests for $\\lambda\

Kai Lin; Shinji Mukohyama; Anzhong Wang

2013-01-07T23:59:59.000Z

130

Covariance statistics of turbulence velocity components for wind-energy-conversion system design-homogeneous, isotropic case  

SciTech Connect (OSTI)

When designing a wind energy converison system (WECS), it may be necessary to take into account the distribution of wind across the disc of rotation. The specific engineering applications include structural strength, fatigue, and control. This wind distribution consists of two parts, namely that associated with the mean wind profile and that associated with the turbulence velocity fluctuation field. The work reported herein is aimed at the latter, namely the distribution of turbulence velocity fluctuations across the WECS disk of rotation. A theory is developed for the two-time covariance matrix for turbulence velocity vector components for wind energy conversion system (WECS) design. The theory is developed for homogeneous and iotropic turbulance with the assumption that Taylor's hypothesis is valid. The Eulerian turbulence velocity vector field is expanded about the hub of the WECS. Formulae are developed for the turbulence velocity vector component covariance matrix following the WECS blade elements. It is shown that upon specification of the turbulence energy spectrum function and the WECS rotation rate, the two-point, two-time covariance matrix of the turbulent flow relative to the WECS bladed elements is determined. This covariance matrix is represented as the sum of nonstationary and stationary contributions. Generalized power spectral methods are used to obtain two-point, double frequency power spectral density functions for the turbulent flow following the blade elements. The Dryden turbulence model is used to demonstrate the theory. A discussion of linear system response analysis is provided to show how the double frequency turbulence spectra might be used to calculate response spectra of a WECS to turbulent flow. Finally the spectrum of the component of turbulence normal to the WECS disc of rotation, following the blade elements, is compared with experimental results.

Fichtl, G.H.

1983-09-01T23:59:59.000Z

131

Methods and Issues for the Combined Use of Integral Experiments and Covariance Data: Results of a NEA International Collaborative Study  

SciTech Connect (OSTI)

The Working Party on International Nuclear Data Evaluation Cooperation (WPEC) of the Nuclear Science Committee under the Nuclear Energy Agency (NEA/OECD) established a Subgroup (called “Subgroup 33”) in 2009 on “Methods and issues for the combined use of integral experiments and covariance data.” The first stage was devoted to producing the description of different adjustment methodologies and assessing their merits. A detailed document related to this first stage has been issued. Nine leading organizations (often with a long and recognized expertise in the field) have contributed: ANL, CEA, INL, IPPE, JAEA, JSI, NRG, IRSN and ORNL. In the second stage a practical benchmark exercise was defined in order to test the reliability of the nuclear data adjustment methodology. A comparison of the results obtained by the participants and major lessons learned in the exercise are discussed in the present paper that summarizes individual contributions which often include several original developments not reported separately. The paper provides the analysis of the most important results of the adjustment of the main nuclear data of 11 major isotopes in a 33-group energy structure. This benchmark exercise was based on a set of 20 well defined integral parameters from 7 fast assembly experiments. The exercise showed that using a common shared set of integral experiments but different starting evaluated libraries and/or different covariance matrices, there is a good convergence of trends for adjustments. Moreover, a significant reduction of the original uncertainties is often observed. Using the a–posteriori covariance data, there is a strong reduction of the uncertainties of integral parameters for reference reactor designs, mainly due to the new correlations in the a–posteriori covariance matrix. Furthermore, criteria have been proposed and applied to verify the consistency of differential and integral data used in the adjustment. Finally, recommendations are given for an appropriate use of sensitivity analysis methods and indications for future work are provided.

Giuseppe Palmiotti; Massimo Salvatores

2014-04-01T23:59:59.000Z

132

Energy-dependent Lorentz covariant parameterization of the NN interaction between 50 and 200 MeV  

E-Print Network [OSTI]

For laboratory kinetic energies between 50 and 200 MeV, we focus on generating an energy-dependent Lorentz covariant parameterization of the on-shell nucleon-nucleon (NN) scattering amplitudes in terms of a number of Yukawa-type meson exchanges in first-order Born approximation. This parameterization provides a good description of NN scattering observables in the energy range of interest, and can also be extrapolated to energies between 40 and 300 MeV.

Z. P. Li; G. C. Hillhouse; J. Meng

2007-12-03T23:59:59.000Z

133

A demonstration of variance and covariance calculations using MAVARIC (Materials Accounting VARIance Calculator) and PROFF (PROcessing and Fuel Facilities calculator)  

SciTech Connect (OSTI)

Good decision-making in materials accounting requires a valid calculation of control limits and detection sensitivity for facilities handling special nuclear materials (SNM). A difficult aspect of this calculation is determining the appropriate variance and covariance values for the terms in the materials balance (MB) equation. Computer software such as MAVARIC (Materials Accounting VARIance Calculator) and PROFF (PROcessing and Fuel Facilities calculator) can efficiently select and combine variance terms. These programs determine the variance and covariance of an MB equation by first obtaining relations for the variance and covariance of each term in the MB equation through propagating instrument errors and then substituting the measured quantities and their uncertainties into these relations. MAVARIC is a custom spreadsheet used with the second release of LOTUS 1-2-3.** PROFF is a stand-alone menu-driven program requiring no commercial software. Programs such as MAVARIC and PROFF facilitate the complex calculations required to determine the detection sensitivity of an SNM facility. These programs can also be used to analyze materials accounting systems.

Barlich, G.L.; Nasseri, S.S.

1990-01-01T23:59:59.000Z

134

Intercomparison of Sensible Heat Flux from Large Aperture Scintillometer and Eddy Covariance Methods: Field Experiment over a Homogeneous Semi-arid Region  

E-Print Network [OSTI]

uctuations of vertical wind speed and air temperature at abetween ?uctuations of vertical wind speed and ?uctuationsT is the covariance between vertical wind speed (w) and air

Zeweldi, Dawit A.; Gebremichael, Mekonnen; Wang, Junming; Sammis, Theodore; Kleissl, Jan; Miller, David

2010-01-01T23:59:59.000Z

135

Properties of nuclei in the nobelium region studied within the covariant, Skyrme, and Gogny energy density functionals  

E-Print Network [OSTI]

We calculate properties of the ground and excited states of nuclei in the nobelium region for proton and neutron numbers of 92 energy-density-functional (EDF) approaches, based on covariant, Skyrme, and Gogny functionals, each within two different parameter sets. A comparative analysis of the results obtained for odd-even mass staggerings, quasiparticle spectra, and moments of inertia allows us to identify single-particle and shell effects that are characteristic to these different models and to illustrate possible systematic uncertainties related to using the EDF modelling

Dobaczewski, J; Bender, M; Robledo, L M; Shi, Yue

2015-01-01T23:59:59.000Z

136

Vaidya Solution in General Covariant Ho?ava-Lifshitz Gravity with the Minimum Coupling and without Projectability: Infrared Limit  

E-Print Network [OSTI]

In this paper, we have studied nonstationary radiative spherically symmetric spacetime, in general covariant theory ($U(1)$ extension) of {the} Ho\\v{r}ava-Lifshitz gravity with the minimum coupling, in the post-newtonian approximation (PPN), without the projectability condition and in the infrared limit. The Newtonian prepotential $\\varphi$ was assumed null. We have shown that there is not the analogue of the Vaidya's solution in the Ho\\v{r}ava-Lifshitz Theory (HLT) with the minimum coupling, as we know in the General Relativity Theory (GRT).

O. Goldoni; M. F. A. da Silva; R. Chan; G. Pinheiro

2014-12-16T23:59:59.000Z

137

Gel'fand-Zetlin Basis and Clebsch-Gordan Coefficients for Covariant Representations of the Lie superalgebra gl(m|n)  

E-Print Network [OSTI]

A Gel'fand-Zetlin basis is introduced for the irreducible covariant tensor representations of the Lie superalgebra gl(m|n). Explicit expressions for the generators of the Lie superalgebra acting on this basis are determined. Furthermore, Clebsch-Gordan coefficients corresponding to the tensor product of any covariant tensor representation of gl(m|n) with the natural representation V ([1,0,...,0]) of gl(m|n) with highest weight (1,0,. . . ,0) are computed. Both results are steps for the explicit construction of the parastatistics Fock space.

N. I. Stoilova; J. Van der Jeugt

2010-04-14T23:59:59.000Z

138

Low-rank approximations for large stationary covariance matrices, as used in the Bayesian and generalized-least-squares analysis of pulsar-timing data  

E-Print Network [OSTI]

Many data-analysis problems involve large dense matrices that describe the covariance of stationary noise processes; the computational cost of inverting these matrices, or equivalently of solving linear systems that contain them, is often a practical limit for the analysis. We describe two general, practical, and accurate methods to approximate stationary covariance matrices as low-rank matrix products featuring carefully chosen spectral components. These methods can be used to greatly accelerate data-analysis methods in many contexts, such as the Bayesian and generalized-least-squares analysis of pulsar-timing residuals.

Rutger van Haasteren; Michele Vallisneri

2014-07-24T23:59:59.000Z

139

Crucial test for covariant density functional theory with new and accurate mass measurements from Sn to Pa  

E-Print Network [OSTI]

The covariant density functional theory with the point-coupling interaction PC-PK1 is compared with new and accurate experimental masses in the element range from 50 to 91. The experimental data are from a mass measurement performed with the storage ring mass spectrometry at GSI [Chen et al., Nucl. Phys. A 882, 71 (2012)]. Although the microscopic theory contains only 11 parameters, it agrees well with the experimental data. The comparison is characterized by a rms deviation of 0.859 MeV. For even-even nuclei, the theory agrees within about 600 keV. Larger deviations are observed in this comparison for the odd-A and odd-odd nuclei. Improvements and possible reasons for the deviations are discussed in this contribution as well.

P. W. Zhao; L. S. Song; B. Sun; H. Geissel; J. Meng

2012-12-31T23:59:59.000Z

140

Searching for 4$?$ linear-chain structure in excited states of $^{16}$O with a covariant density functional theory  

E-Print Network [OSTI]

A study of 4$\\alpha$ linear-chain structure in high-lying collective excitation states of $^{16}$O with a covariant density functional theory is presented. The low-spin states are obtained by configuration mixing of particle-number and angular-momentum projected quadrupole deformed mean-field states with generator coordinate method. The high-spin states are determined by cranking calculations. These two calculations are based on the same energy density functional PC-PK1. We have found a rotational band at low-spin with the dominated intrinsic configuration considered to be the one that 4$\\alpha$ clusters stay along a common axis. The strongly deformed rod shape also appears in the high-spin region with the angular momentum $13-18\\hbar$; however whether the state is pure $4\\alpha$ linear chain or not is less obvious than that in the low-spin states.

J. M. Yao; N. Itagaki; J. Meng

2014-09-19T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

Contribution of matter fields to the Gell-Mann-Low function for N=1 supersymmetric Yang-Mills theory, regularized by higher covariant derivatives  

E-Print Network [OSTI]

Contribution of matter fields to the Gell-Mann-Low function for N=1 supersymmetric Yang-Mills theory, regularized by higher covariant derivatives, is obtained using Schwinger-Dyson equations and Slavnov-Tailor identities. A possible deviation of the result from the corresponding contribution in the exact Novikov, Shifman, Vainshtein and Zakharov $\\beta$-function is discussed.

K. V. Stepanyantz

2006-08-06T23:59:59.000Z

142

Two-loop Gell-Mann-Low function of N=1 supersymmetric Yang-Mills theory, regularized by higher covariant derivatives  

E-Print Network [OSTI]

Two-loop Gell-Mann-Low function is calculated for N=1 supersymmetric Yang-Mills theory, regularized by higher covariant derivatives. The integrals, which define it, are shown to be reduced to total derivatives and can be easily calculated analytically.

A. B. Pimenov; K. V. Stepanyantz

2007-07-26T23:59:59.000Z

143

Comparison of Integral Parameters Estimated Uncertainties in Fast Neutron Systems with COMMARA-2.1 and COMMARA-2.0 Covariance Data  

SciTech Connect (OSTI)

This paper aims to show the main diffrences between the COMMARA-2.0 and COMMARA-2.1 evaluated covariance data in the uncertainty estimation of integral parameters of interest for a large number of typical innovative fast neutron systems.

Giuseppe Palmiotti; Massimo Salvatores

2015-01-01T23:59:59.000Z

144

Compiler correctness and the translation of logics Theo M.V. Janssen  

E-Print Network [OSTI]

be proven by finite algebraic means. PrL Compile - AssL Sem(PrL) IntP L ? Decode CompMod IntAL ? PrL of the rightmost diagram. PrL: Programming Language IntP L Interpretation of PrL AssL: Assembly Language IntAL Interpretation of AssL Sem(PrL): meanings of the PrL CompMod: abstract model of computer Several variants

Amsterdam, University of

145

Theos J. Thompson, 1964 | U.S. DOE Office of Science (SC)  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism in Layered NbS2 andThe1 Members Theme

146

Covariant spectator theory of $np$ scattering:\\\\ Phase shifts obtained from precision fits to data below 350 MeV  

SciTech Connect (OSTI)

Using the covariant spectator theory (CST), we present two one boson exchange kernels that have been successfully adjusted to fit the 2007 world $np$ data (containing 3788 data) below 350 MeV. One model (which we designate WJC-1) has 27 parameters and fits with a chi2/N = 1.06. The other model (designated WJC-2) has only 15 parameters and fits with a chi2/N = 1.12. Both of these models also reproduce the experimental triton binding energy without introducing additional irreducible three-nucleon forces. One result of this work is a new phase shift analysis, updated for all data until 2006, which is useful even if one does not work within the CST. In carrying out these fits we have reviewed the entire data base, adding new data not previously used in other high precision fits and restoring some data omitted in previous fits. A full discussion and evaluation of the 2007 data base is presented.

Franz Gross; Alfred Stadler

2008-02-11T23:59:59.000Z

147

Receding Horizon Covariance Control  

E-Print Network [OSTI]

is an embedded submanifold of Rn. An integral curve x(t) of f is a trajectory in M tangent to the vector eld at all points along the curve, i.e. f(x(t)) = _x(t). For every initial condition x0 2 M there exists an > 0 and a neighborhood U of x0 such that x0... is taken into an integral curve x(t) by the ow, which is the map given by ’ : ( ; ) U !M . We adopt the shorthand ’(t; x0) =: ’t(x0) = x(t). It is known that ’t : U ! ’t(U) is a di eomorphism onto its image satisfying ’0(x) = x, ’t+s(x) = ’t ’s...

Wendel, Eric

2012-10-19T23:59:59.000Z

148

Systematic study of nuclear matrix elements in neutrinoless double-beta decay with a beyond mean-field covariant density functional theory  

E-Print Network [OSTI]

We report a systematic study of nuclear matrix elements (NMEs) in neutrinoless double-beta decays with a state-of-the-art beyond mean-field covariant density functional theory. The dynamic effects of particle-number and angular-momentum conservations as well as quadrupole shape fluctuations are taken into account with projections and generator coordinate method for both initial and final nuclei. The full relativistic transition operator is adopted to calculate the NMEs. The present systematic studies show that in most of the cases there is a much better agreement with the previous non-relativistic calculation based on the Gogny force than in the case of the nucleus $^{150}$Nd found in Song et al. [Phys. Rev. C 90, 054309 (2014)]. In particular, we find that the total NMEs can be well approximated by the pure axial-vector coupling term with a considerable reduction of the computational effort.

J. M. Yao; L. S. Song; K. Hagino; P. Ring; J. Meng

2015-01-29T23:59:59.000Z

149

Faddeev-Popov-ghost propagators for Yang-Mills theories and perturbative quantum gravity in the covariant gauge in de Sitter spacetime  

SciTech Connect (OSTI)

The propagators of the Faddeev-Popov (FP) ghosts for Yang-Mills theories and perturbative quantum gravity in the covariant gauge are infrared (IR) divergent in de Sitter spacetime. We point out, however, that the modes responsible for these divergences will not contribute to loop diagrams in computations of time-ordered products in either Yang-Mills theories or perturbative quantum gravity. Therefore, we propose that the IR-divergent FP-ghost propagator should be regularized by a small mass term that is sent to zero in the end of any perturbative calculations. This proposal is equivalent to using the effective FP-ghost propagators, which we present in an explicit form, obtained by removing the modes responsible for the IR divergences. We also make some comments on the corresponding propagators in anti-de Sitter spacetime.

Faizal, Mir; Higuchi, Atsushi [Department of Mathematics, University of York, Heslington, York YO10 5DD (United Kingdom)

2008-09-15T23:59:59.000Z

150

Next Location Prediction Within a Smart Office Building Jan Petzold, Faruk Bagci, Wolfgang Trumler, and Theo Ungerer  

E-Print Network [OSTI]

Next Location Prediction Within a Smart Office Building Jan Petzold, Faruk Bagci, Wolfgang Trumler is notified about the probable next location of an absent office owner within a smart office building the efficiency of several prediction methods. The scenario concerns employees in an office building visiting

Vintan, Lucian N.

151

Optimal basis set for ab-initio calculations of energy levels in tunneling structures, using the covariance matrix of the wave functions  

E-Print Network [OSTI]

The paper proposes a method to obtain the optimal basis set for solving the self consistent field (SCF) equations for large atomic systems in order to calculate the energy barriers in tunneling structures, with higher accuracy and speed. Taking into account the stochastic-like nature of the samples of all the involved wave functions for many body problems, a statistical optimization is made by considering the covariance matrix of these samples. An eigenvalues system is obtained and solved for the optimal basis set and by inspecting the rapidly decreasing eigenvalues one may seriously reduce the necessary number of vectors that insures an imposed precision. This leads to a potentially significant improvement in the speed of the SCF calculations and accuracy, as the statistical properties of a large number of wave functions in an large spatial domain may be considered. The eigenvalue problem has to be solved only few times, so that the amount of time added may be much smaller that the overall iterating SCF calculations. A simple implementation of the method is presented for a situation where the analytical solution is known, and the results are encouraging.

Sever Spanulescu

2009-12-15T23:59:59.000Z

152

Microscopic study of low-lying spectra of $\\Lambda$ hypernuclei based on a beyond-mean-field approach with covariant energy density functional  

E-Print Network [OSTI]

We present a detailed formalism of the microscopic particle-rotor model for hypernuclear low-lying states based on a covariant density functional theory. In this method, the hypernuclear states are constructed by coupling a hyperon to low-lying states of the core nucleus, which are described by the generator coordinate method (GCM) with the particle number and angular momentum projections. We apply this method to study in detail the low-lying spectrum of $^{13}_{~\\Lambda}$C and $^{21}_{~\\Lambda}$Ne hypernuclei. We also briefly discuss the structure of $^{155}_{~~\\Lambda}$Sm as an example of heavy deformed hypernuclei. It is shown that the low-lying excitation spectrum with positive parity states of the hypernuclei, which are dominated by $\\Lambda$ hyperon in $s$-orbital coupled to the core states, are similar to that for the corresponding core states, while the electric quadrupole transition strength, $B(E2)$, from the 2$^+_1$ state to the ground state is reduced according to the mass number of the hypernucle...

Mei, H; Yao, J M; Motoba, T

2015-01-01T23:59:59.000Z

153

Three lectures on global boundary conditions and the theory of self--adjoint extensions of the covariant Laplace--Beltrami and Dirac operators on Riemannian manifolds with boundary  

E-Print Network [OSTI]

In these three lectures we will discuss some fundamental aspects of the theory of self-adjoint extensions of the covariant Laplace-Beltrami and Dirac operators on compact Riemannian manifolds with smooth boundary emphasizing the relation with the theory of global boundary conditions. Self-adjoint extensions of symmetric operators, specially of the Laplace-Beltrami and Dirac operators, are fundamental in Quantum Physics as they determine either the energy of quantum systems and/or their unitary evolution. The well-known von Neumann's theory of self-adjoint extensions of symmetric operators is not always easily applicable to differential operators, while the description of extensions in terms of boundary conditions constitutes a more natural approach. Thus an effort is done in offering a description of self-adjoint extensions in terms of global boundary conditions showing how an important family of self-adjoint extensions for the Laplace-Beltrami and Dirac operators are easily describable in this way. Moreover boundary conditions play in most cases an significant physical role and give rise to important physical phenomena like the Casimir effect. The geometrical and topological structure of the space of global boundary conditions determining regular self-adjoint extensions for these fundamental differential operators is described. It is shown that there is a natural homology class dual of the Maslov class of the space. A new feature of the theory that is succinctly presented here is the relation between topology change on the system and the topology of the space of self-adjoint extensions of its Hamiltonian. Some examples will be commented and the one-dimensional case will be thoroughly discussed.

A. Ibort

2012-05-16T23:59:59.000Z

154

Estimation of multi-group cross section covariances for {sup 235,238}U, {sup 239}Pu, {sup 241}Am, {sup 56}Fe, {sup 23}Na and {sup 27}Al  

SciTech Connect (OSTI)

This paper presents the methodology used to estimate multi-group covariances for some major isotopes used in reactor physics. The starting point of this evaluation is the modelling of the neutron induced reactions based on nuclear reaction models with parameters. These latest are the vectors of uncertainties as they are absorbing uncertainties and correlation arising from the confrontation of nuclear reaction model to microscopic experiment. These uncertainties are then propagated towards multi-group cross sections. As major breakthroughs were then asked by nuclear reactor physicists to assess proper uncertainties to be used in applications, a solution is proposed by the use of integral experiment information at two different stages in the covariance estimation. In this paper, we will explain briefly the treatment of all type of uncertainties, including experimental ones (statistical and systematic) as well as those coming from validation of nuclear data on dedicated integral experiment (nuclear data oriented). We will illustrate the use of this methodology with various isotopes such as {sup 235,238}U, {sup 239}Pu, {sup 241}Am, {sup 56}Fe, {sup 23}Na and {sup 27}Al. (authors)

De Saint Jean, C.; Archier, P.; Noguere, G.; Litaize, O.; Vaglio-Gaudard, C.; Bernard, D.; Leray, O. [CEA, DEN, DER, Cadarache, F-13108 Saint-Paul-lez-Durance (France)

2012-07-01T23:59:59.000Z

155

Optimization Online - Covariance regularization in inverse space  

E-Print Network [OSTI]

May 29, 2009 ... ... large-scale normal distribution in the context of data assimilation from a relatively small number of data from the satellite. Data assimilation is ...

Genta Ueno

2009-05-29T23:59:59.000Z

156

Smooth Optimization Approach for Covariance Selection ?  

E-Print Network [OSTI]

Jun 30, 2007 ... eigenvalues of the solution. Acknowledgement. The author would like to thank Professor Alexandre d'Aspremont for a careful discussion on.

2007-07-03T23:59:59.000Z

157

Density-dependent covariant energy density functionals  

SciTech Connect (OSTI)

Relativistic nuclear energy density functionals are applied to the description of a variety of nuclear structure phenomena at and away fromstability line. Isoscalar monopole, isovector dipole and isoscalar quadrupole giant resonances are calculated using fully self-consistent relativistic quasiparticle randomphase approximation, based on the relativistic Hartree-Bogoliubovmodel. The impact of pairing correlations on the fission barriers in heavy and superheavy nuclei is examined. The role of pion in constructing desnity functionals is also investigated.

Lalazissis, G. A. [Physics Department, Aristotle University of Thessaloniki, GR-54124 (Greece)

2012-10-20T23:59:59.000Z

158

Generalized score tests for missing covariate data  

E-Print Network [OSTI]

that n?12U(?,?piN,0) = n?12U(?,pi,??) +Op(?n), n?12UA(?,?piN, ???N) = Op(?n), (2.7) where UA(?,pi,?) = summationtextni=1(1? ?ipii)?(yi,zi), and ?n = braceleftbignh2s + (nh2d)?1bracerightbig12. 13 Liang, Wang, Robins, and Carroll (2004) used different...) +Rn1, U2(??) = U2(?) +E(?U2?? 1 )(??1 ??1) +Rn2, where the remainders Rn1, Rn2 are relatively negligibly small with order Op(1) under H0 and the partial derivatives above are row vectors. By combining the two equations above, we have U2(??) = (?A...

Jin, Lei

2009-05-15T23:59:59.000Z

159

Metal oxide/organic interface investigations for photovoltaic devices  

E-Print Network [OSTI]

summarises work I have carried out as a PhD student of the Optoelectronics Group at Cavendish Laboratory of the University of Cambridge since October 2010. I am thankful to the Engineering and Physical Sciences Research Council and the A.G. Leventis... are often used in many other optoelectronic devices such as photovoltaics and light emitting diodes. Sufficiently conducting oxides with the appropriate electron affinities and ionisation potentials, can be employed as charge transport and injection layers...

Pachoumi, Olympia

2014-10-07T23:59:59.000Z

160

Land use, food production, and the future of tropical forest species in Ghana  

E-Print Network [OSTI]

by discussions with Brigid Barry, David Bowden, Lauren Coad, Nigel Collar, Paul Donald, Rob Ewers, Vicky Jones, Val Kapos, Eric Keys, Deborah Lawrence, Tasso Leventis, Ken Norris, Debbie Pain, Hugo Rainey, B. L. Turner and Juliet Vickery. Thanks to John... in a wildlife protected area, although I ended up working only in forest reserves. I thank Moses Sam and Phil Marshall for interesting discussions, and Kofi Affum-Baffo, Francis Agurgo, Edward Obiaw and Oheneba Amponsah Agyemang of the Resource...

Phalan, Benjamin Timothy

2010-07-06T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

E-Print Network 3.0 - anlagen zur spaltung Sample Search Results  

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

IN KOMPLEXEM GELNDE Detlev Heinemann, Heinz-Theo Mengelkamp... Geesthacht Zusammenfassung Zur Windpotentialbestimmung im komplexen Gelande werden zunehmend...

162

NOTE Communicated by George Gerstein Disambiguating Different Covariation Types  

E-Print Network [OSTI]

method is much more computationally demand- ing, and although it can determine whether latency Massachusetts Institute of Technology #12;1528 Carlos D. Brody tentially have generated the covariogram being) is the binned spiking response of cell i during trial r, the symbol hi represents averaging over trials r

Brody, Carlos

163

Localizing Search Using Covariance Jason Galbraith, Seth Pellegrino, Peter Drake  

E-Print Network [OSTI]

-208 (2007). Gelly, S. & Silver, D. Combining online and offline knowledge in UCT. In International. Bandit based monte-carlo planning. In ECML-06 (2006). We'd also like to thank the Willamette Valley REU

Drake, Peter

164

Mean and covariance matrix adaptive estimation for a weakly ...  

E-Print Network [OSTI]

a trade-off between the mean cost E[?rN+1x] = ??N+1x and its standard deviation ...... We consider a single investment period and have to decide the amount.

2011-01-25T23:59:59.000Z

165

Extremal covariant positive operator valued measures Giulio Chiribellaa)  

E-Print Network [OSTI]

Nazionale di Fisica della Materia, Unità di Pavia, Dipartimento di Fisica "A. Volta," via Bassi 6, I-27100 Pavia, Italy Giacomo Mauro D'Arianob) QUIT Group, Istituto Nazionale di Fisica della Materia, Unità di Pavia, Dipartimento di Fisica "A. Volta," via Bassi 6, I-27100 Pavia, Italy, and Department

D'Ariano, Giacomo Mauro

166

Ensemble Statistics and Error Covariance of a Rapidly Intensifying Hurricane  

E-Print Network [OSTI]

transformations of normal distributions. Various standard transformations of two Gaussian distributions are made. Skewness, kurtosis, and correlation between the two distributions are taken before and after the transformations. It can be seen that there is a...

Rigney, Matthew C.

2010-01-16T23:59:59.000Z

167

CPM: A Covariance-preserving Projection Method Ravi Janardan  

E-Print Network [OSTI]

Introduction Linear Discriminant Analysis (LDA) [4, 7, 8] is a well-known scheme for feature extraction Discriminant Analysis (LDA), Sliced Average Variance Estimator (SAVE), and Heteroscedastic Discriminant Analysis (HDA). This gives us new insights into the na- ture of these different algorithms. We use both

Ye, Jieping

168

Visualization of Anatomic Covariance Tensor Fields Gordon L. Kindlmann1  

E-Print Network [OSTI]

of Utah, UT 2 Laboratory of Neuro Imaging, Brain Mapping Division, Department of Neurology, UCLA School of Medicine, CA Abstract-- The computation, visualization, and interpretation of brain variability remains. The resulting visual- izations support a more detailed characterization of population variability of brain

Utah, University of

169

Free Probability, Sample Covariance Matrices and Stochastic Eigen-Inference  

E-Print Network [OSTI]

Random matrix theory is now a big subject with applications in many disciplines of science, engineering and finance. This talk is a survey specifically oriented towards the needs and interests of a computationally inclined ...

Edelman, Alan

170

Sample covariance based estimation of Capon algorithm error probabilities  

E-Print Network [OSTI]

The method of interval estimation (MIE) provides a strategy for mean squared error (MSE) prediction of algorithm performance at low signal-to-noise ratios (SNR) below estimation threshold where asymptotic predictions fail. ...

Richmond, Christ D.

171

Conformally covariant boundary correlation functions with a quantum group  

E-Print Network [OSTI]

Particular boundary correlation functions of conformal field theory are needed to answer some questions related to random conformally invariant curves known as Schramm-Loewner evolutions (SLE). In this article, we introduce a correspondence and establish its fundamental properties, which are used in companion articles for explicitly solving two such problems. The correspondence associates Coulomb gas type integrals to vectors in a tensor product representation of a quantum group, a q-deformation of the Lie algebra sl2. We show that desired properties of the functions are guaranteed by natural representation theoretical properties of the vectors.

Kalle Kytölä; Eveliina Peltola

2014-10-23T23:59:59.000Z

172

Newton-Like Methods for Sparse Inverse Covariance Estimation  

E-Print Network [OSTI]

Jun 7, 2012 ... ‡Department of Industrial Engineering and Managment Sciences, Northwestern University. §IBM Watson ... Economy of computation is ...

2012-06-07T23:59:59.000Z

173

Magnetic and antimagnetic rotation in covariant density functional theory  

SciTech Connect (OSTI)

Progress on microscopic and self-consistent description of the magnetic rotation and antimagnetic rotation phenomena in tilted axis cranking relativistic mean-field theory based on a point-coupling interaction are briefly reviewed. In particular, the microscopic pictures of the shears mechanism in {sup 60}Ni and the two shears-like mechanism in {sup 105}Cd are discussed.

Zhao, P. W.; Liang, H. Z.; Peng, J.; Ring, P.; Zhang, S. Q.; Meng, J. [State Key Lab Nucl. Phys. and Tech., School of Physics, Peking University, Beijing 100871 (China); Department of Physics, Beijing Normal University, Beijing 100875 (China); State Key Lab Nucl. Phys. and Tech., School of Physics, Peking University, Beijing 100871 (China) and Physik Department, Technische Universitat Muenchen, D-85747 Garching (Germany); State Key Lab Nucl. Phys. and Tech., School of Physics, Peking University, Beijing 100871 (China); State Key Lab Nucl. Phys. and Tech., School of Physics, Peking University, Beijing 100871 (China) and Department of Physics, University of Stellenbosch, Stellenbosch (South Africa)

2012-10-20T23:59:59.000Z

174

Mean and Covariance Structure Analysis of Hierarchical Data  

E-Print Network [OSTI]

are g H d ' = ^ z ' ^ g ® »V S = symmetric d lNg where I N Ng ® £yz lNg ® 2w is an identity matrixof dimension N , l g + lNg lNg' ® N g is a unit vector of

Bengt O. Muthén

2011-01-01T23:59:59.000Z

175

Sensitivity analysis and calibration of the covariance matrix for ...  

E-Print Network [OSTI]

[Mar52] and of a generalisation of this problem taking into account the ..... thus of interest to consider model (B) above which is more realistic for stock returns on.

2011-01-25T23:59:59.000Z

176

Covariant Weyl quantization, symbolic calculus, and the product formula  

E-Print Network [OSTI]

Formula..................... 70 2. ExpansionsandtheAsymptoticFormula ....... 74 3. The Multivariate Fa` di Bruno Formula and the ProductRule....................... 80 B.FirstTermsintheExpansion ................ 84 1. m =0........................... 85 2. m =1...

Gunturk, Kamil Serkan

2006-08-16T23:59:59.000Z

177

Manifestly Covariant Gauge-invariant Cosmological Perturbation Theory  

E-Print Network [OSTI]

It is shown that a first-order cosmological perturbation theory for the open, flat and closed Friedmann-Lema\\^itre-Robertson-Walker universes admits one, and only one, gauge-invariant variable which describes the perturbation to the energy density and which becomes equal to the usual Newtonian energy density in the non-relativistic limit. The same holds true for the perturbation to the particle number density. Using these two new variables, a new manifestly gauge-invariant cosmological perturbation theory has been developed. Density perturbations evolve diabatically. Perturbations in the total energy density are gravitationally coupled to perturbations in the particle number density, irrespective of the nature of the particles. There is, in first-order, no back-reaction of perturbations to the global expansion of the universe. Small-scale perturbations in the radiation-dominated era oscillate with an increasing amplitude, whereas in older, less precise treatments, oscillating perturbations are found with a decreasing amplitude. This is a completely new and, obviously, important result, since it makes it possible to explain and understand the formation of massive stars after decoupling of matter and radiation.

P. G. Miedema; W. A. van Leeuwen

2014-10-01T23:59:59.000Z

178

Covariant Spectator Theory of np scattering: Deuteron Quadrupole Moment  

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

The deuteron quadrupole moment is calculated using two CST model wave functions obtained from the 2007 high precision fits to $np$ scattering data. Included in the calculation are a new class of isoscalar $np$ interaction currents automatically generated by the nuclear force model used in these fits. The prediction for model WJC-1, with larger relativistic P-state components, is $2.5\\%$ smaller that the experiential result, in common with the inability of models prior to 2014 to predict this important quantity. However, model WJC-2, with very small P-state components, gives agreement to better than 1\\%, similar to the results obtained recently from $\\chi$EFT predictions to order N$^3$LO.

Gross, Franz

2015-01-01T23:59:59.000Z

179

and the eddy-covariance system and meteorological station were  

E-Print Network [OSTI]

and Tchizalamou flux tower sites by Yann Nouvellon Figure 1: Closed-path (Li-6262+ sonic anemometer Young 81000V graduate student : Sally Archibald ........................Page 7 FLUXNET young scientist: Agnes de with the closed-path system, and one month with the two systems, for comparison) #12;Africa surface. Another chal

180

Estimation in Covariate Adjusted Regression Damla Senturk1  

E-Print Network [OSTI]

confounder in a multiplicative fashion. One example is data collected for a study on diabetes, where adjusted for the effects of the confounders. One example is data collected for a study on diabetes (Willems for diabetes, including cholesterol and hypertension, and diagnostic variables, such as glycosolated hemoglobin

Sentürk, Damla

Note: This page contains sample records for the topic "leventis theo covary" 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

Common Component Analysis for Multiple Covariance Matrices Technical Report  

E-Print Network [OSTI]

real stock market datasets, where major financial events can be visualized in low dimensions. 1 preserving as much of the "energy" or variance as possible. The problem can be solved by an eigenvalue subspaces. Examples include stock market data where financial shocks and volatility arise from different

Banerjee, Arindam

182

E-Print Network 3.0 - afghanistan introducing population Sample...  

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

Theo Farrell Summary: in Afghanistan points to three such benefits, in particular: More boots on the ground; increased civilian... of the spectrum, such as the 2001 invasion of...

183

E-Print Network 3.0 - afghanistan Sample Search Results  

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

Theo Farrell Summary: in Afghanistan points to three such benefits, in particular: More boots on the ground; increased civilian... of the spectrum, such as the 2001 invasion of...

184

E-Print Network 3.0 - afghanistan post-war governance Sample...  

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

Theo Farrell Summary: in Afghanistan points to three such benefits, in particular: More boots on the ground; increased civilian... require the authorization of all partner...

185

E-Print Network 3.0 - acylase family members Sample Search Results  

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

on biocatalysis that I got due to the members of the "STW-begeleidingscommissie", Nico Boots, Theo Sonke, Jan... and perfectionist), Wynand (ex- PA group member, now computer...

186

Trajectories of Human Multi-Joint Arm Movements: Evidence of Joint Level Planning  

E-Print Network [OSTI]

the ma\\;imum-smoothncs% theoF car successfull> descti'be tne ua!ectories of human point-:o-porn: honzonta

Flanagan, Randy

187

amerikaanse lng-projecten zetten: Topics by E-print Network  

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

amerikaanse lng-projecten zetten First Page Previous Page 1 Next Page Last Page Topic Index 1 Verschenen: Lans Bovenberg, Jean Frijn, Kees Goudswaard en Theo Nijman, 'Sociale...

188

Six-Week Time Series Of Eddy Covariance CO2 Flux At Mammoth Mountain...  

Open Energy Info (EERE)

statistical regression of EC energy fluxes (sensible and latent heat) against available energy (net radiation, less soil heat flux). While incomplete (R2 0.77 for 1:1 line),...

189

Renormalization of composite operators in Yang-Mills theories using a general covariant gauge  

SciTech Connect (OSTI)

Essential to QCD applications of the operator product expansion, etc., is a knowledge of those operators that mix with gauge-invariant operators. A standard theorem asserts that the renormalization matrix is triangular: Gauge-invariant operators have alien'' gauge-variant operators among their counterterms, but, with a suitably chosen basis, the necessary alien operators have only themselves as counterterms. Moreover, the alien operators are supposed to vanish in physical matrix elements. A recent calculation by Hamberg and van Neerven apparently contradicts these results. By explicit calculations with the energy-momentum tensor, we show that the problems arise because of subtle infrared singularities that appear when gluonic matrix elements are taken on shell at zero momentum transfer.

Collins, J.C.; Scalise, R.J. (The Pennsylvania State University, Department of Physics, 104 Davey Laboratory, University Park, Pennsylvania 16802 (United States))

1994-09-15T23:59:59.000Z

190

LETTER Communicated by Tzyy-Ping Jung A New Approach to Spatial Covariance Modeling of Functional  

E-Print Network [OSTI]

in response to experimental task demands are of particular interest. Among the existing network analyses Massachusetts Institute of Technology #12;Ordinal Trend Canonical Variates Analysis 1603 James R. Moeller jrm8

191

An ADMM algorithm for matrix completion of partially known state covariances  

E-Print Network [OSTI]

in part by the University of Minnesota Initiative for Renewable Energy and the Environment under Early a convex relaxation based on the nuclear norm. The resulting optimization problem can be cast as a semi to demonstrate the effectiveness of the developed approach. Index Terms-- Alternating direction method

Georgiou, Tryphon T.

192

Eddy-covariance observations of the atmosphere-biosphere exchange of nitrogen oxides  

E-Print Network [OSTI]

and Kesselmeier, J. : Nitrogen dioxide (NO 2 ) uptake byM. : Leaf uptake of nitrogen dioxide (NO 2 ) in a tropicalMorikawa, H. : Atmospheric nitrogen dioxide gas is a plant

Min, Kyung-Eun

2012-01-01T23:59:59.000Z

193

Covariant formulation for the optimal control of jointed arm robots: an alternative to Pontryagin's principle  

E-Print Network [OSTI]

We elaborate algorithms able to efficiently command the actuators of an articulated robot. Our time discretization method is based on cubic and quintic Hermite Finite Elements. The suggested control optimization consists in minimizing directly the selected criterium by a conjugate gradient type algorithm. A generic example illustrates the super convergence of the Hermite's technique.

J. A. Rojas Quintero; C. Vallée; J. P. Gazeau; P. Seguin

2013-05-28T23:59:59.000Z

194

Covariant formulation for the optimal control of jointed arm robots: an alternative to Pontryagin's principle  

E-Print Network [OSTI]

We elaborate algorithms able to efficiently command the actuators of an articulated robot. Our time discretization method is based on cubic and quintic Hermite Finite Elements. The suggested control optimization consists in minimizing directly the selected criterium by a conjugate gradient type algorithm. A generic example illustrates the super convergence of the Hermite's technique.

Quintero, J A Rojas; Gazeau, J P; Seguin, P

2013-01-01T23:59:59.000Z

195

Eddy-covariance observations of the atmosphere-biosphere exchange of nitrogen oxides  

E-Print Network [OSTI]

4.9 ± 0.2 ppm NOx in N 2 , PRAXAIR) was diluted to 3-20 ppb5.4 ppm ± 5% NO in N 2 , PRAXAIR) was diluted with zero air

Min, Kyung-Eun

2012-01-01T23:59:59.000Z

196

E-Print Network 3.0 - aquatic habitat covariates Sample Search...  

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

interactions in vegetated aquatic... and Laboratory Evaluation of Habitat Use by Rainwater Killifish (Lucania ... Source: Jordan, Frank - Department of Biological...

197

Eddy-Covariance and auxiliary measurements, NGEE-Barrow, 2012-2013  

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

The EC tower is operated as part of the Next Generation Ecosystem Experiment-Arctic (NGEE) at Barrow, Alaska. The tower is collecting flux data from the beginning of the thaw season, early June, and until conditions are completely frozen, early November. The tower is equipped with a Gill R3-50 Sonic Anemometer, LI-7700 (CH4) sensor, a LI-7500A (CO2/H2O) sensor, and radiation sensors (Kipp and Zonen CNR-4 (four component radiometer), two LiCor LI-190 quantum sensors (PAR upwelling and downwelling), and a down-looking Apogee SI-111 infrared radiometer (surface temperature)). The sensors are remotely controlled, and communication with the tower allows us to retrieve information in real time.

Torn, Margaret; Billesbach, Dave; Raz-Yaseef, Naama

198

BOOK REVIEWS 143 attention to covariate-conditioned average and quantile effects, along with as-  

E-Print Network [OSTI]

confidence intervals and testing hypotheses. Their method is applied to a study of the impact of crude oil prices on gasoline prices. Hendry developed the general-to-specific (GETS) procedure for model se, for example, asset prices, whose marginal distributions display strong nonnormal features such as skewness and

Krishnamoorthy, Kalimuthu

199

Seconder's discussion of "Large covariance estimation by thresholding principal orthogonal complements" by Fan, Liao  

E-Print Network [OSTI]

Professors Fan, Liao and Mincheva for the stimu- lating and thought-provoking article. The POET estimator verify this model assumption, and secondly, whether POET offers acceptable performance if the assumption from the point of view of the usability of POET: the authors warn us that POET may perform poorly if K

Fryzlewicz, Piotr

200

Derivation of Covariant Dissipative Fluid Dynamics in the Renormalization-group Method  

E-Print Network [OSTI]

We derive generic relativistic hydrodynamical equations with dissipative effects from the underlying Boltzmann equation in a mechanical and systematic way on the basis of so called the renormalization-group (RG) method. A macroscopic frame vector is introduced to specify the frame on which the macroscopic dynamics is described. Our method is so mechanical with only few ansatz that our method give a microscopic foundation of the available hydrodynamical equations, and also can be applied to make a reduction of the kinetic equations other than the simple Boltzmann equation.

K. Tsumura; T. Kunihiro; K. Ohnishi

2006-12-29T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

Field-Failure Predictions Based on Failure-time Data with Dynamic Covariate Information  

E-Print Network [OSTI]

State University Ames, IA 50011 Abstract Modern technological developments such as smart chips, sensors; Dynamic data; Lifetime data; Usage history, Warranty returns. 1 #12;1 Introduction 1.1 Background Modern technology, involving new components and systems such as smart chips, sensors and wireless networks, has

202

Comparison of models for baryon calculations in a covariant three-body Faddeev approach  

E-Print Network [OSTI]

-preserving truncation. In mesons: Chiral symmetry is formalized by AV-WTI (guarantees massless pions in the chiral limit) Symmetry-preserving truncation. In mesons: Chiral symmetry is formalized by AV-WTI (guarantees massless: Simplest realization of AV-WTI keep only vector part of qg-vertex, µ, Helios Sanchis Alepuz (University

Rossak, Wilhelm R.

203

Covariant Spectator Theory of np scattering: Deuteron magnetic moment and form factors  

SciTech Connect (OSTI)

The deuteron magnetic moment is calculated using two model wave functions obtained from 2007 high precision fits to $np$ scattering data. Included in the calculation are a new class of isoscalar $np$ interaction currents which are automatically generated by the nuclear force model used in these fits. After normalizing the wave functions, nearly identical predictions are obtained: model WJC-1, with larger relativistic P-state components, gives 0.863(2), while model WJC-2 with very small $P$-state components gives 0.864(2) These are about 1\\% larger than the measured value of the moment, 0.857 n.m., giving a new prediction for the size of the $\\rho\\pi\\gamma$ exchange, and other purely transverse interaction currents that are largely unconstrained by the nuclear dynamics. The physical significance of these results is discussed, and general formulae for the deuteron form factors, expressed in terms of deuteron wave functions and a new class of interaction current wave functions, are given.

Gross, Franz L. [JLAB

2014-06-01T23:59:59.000Z

204

Efficient Small Area Estimation in the Presence of Measurement Error in Covariates  

E-Print Network [OSTI]

for the four estimators, yi, eYiS, bYiME, bYiSIMEX when the number of small areas is 100, measure- ment error variance Ci = 3 and 2v = 4. k is the percentage of areas having auxiliary information measured with error. : : : : : : : 52 2 Absolute value... 3 Jackknife estimates of the mean squared error of the Lohr-Ybarra estimator bYiME and the SIMEX estimator bYiSIMEX when the num- ber of small areas is 100, measurement error variance Ci = 2 and 2v = 4. k is the percentage of areas having...

Singh, Trijya

2012-10-19T23:59:59.000Z

205

Economical phase-covariant cloning of qudits Francesco Buscemi,* Giacomo Mauro D'Ariano,  

E-Print Network [OSTI]

of the concept of "economical maps" by means of the Stinespring representation theorem for completely positive

D'Ariano, Giacomo Mauro

206

Predicting New Hampshire Indoor Radon Concentrations from geologic information and other covariates  

E-Print Network [OSTI]

uranium concentrations (NURE). Fig. 3. Geologic map of Newuranium concentrations (NURE). New Hampshire Geology Geol.Uranium Resource Evaluation (NURE), which were processed (

Apte, M.G.

2011-01-01T23:59:59.000Z

207

Initial Member Selection and Covariance Localization Study of Ensemble Kalman Filter based Data Assimilation  

E-Print Network [OSTI]

in the application of petroleum history matching in recent years. The basic methodology of the EnKF consists of the forecast step and the update step. This data assimilation method utilizes a collection of state vectors, known as an ensemble, which are simulated...

Yip, Yeung

2011-08-08T23:59:59.000Z

208

Predicting New Hampshire Indoor Radon Concentrations from geologic information and other covariates  

E-Print Network [OSTI]

about the home's construction, heating sources and usage,detached homes, that have forced-air heating, etc. A l l wehomes that use municipal water and have no forced-air heating—

Apte, M.G.

2011-01-01T23:59:59.000Z

209

The Normalization of Perturbative String Amplitudes: Weyl Covariance and Zeta Function Regularization  

E-Print Network [OSTI]

This is a self-contained pedagogical review of Polchinski's 1986 analysis from first principles of the Polyakov path integral based on Hawking's zeta function regularization technique for scale-invariant computations in two-dimensional quantum gravity, an approach that can be adapted to any of the perturbative string theories. In particular, we point out the physical significance of preserving both Weyl and global diffeomorphism invariance while taking the low energy field theory limit of scattering amplitudes in an open and closed string theory, giving a brief discussion of some physics applications. We review the path integral computation of the pointlike off-shell closed bosonic string propagator due to Cohen, Moore, Nelson, and Polchinski. The extension of their methodology to the case of the macroscopic loop propagator in an embedding flat spacetime geometry has been given by Chaudhuri, Chen, and Novak. We examine the macroscopic loop amplitude from the perspective of both the target spacetime massive type II supergravity theory, and the boundary state formalism of the worldsheet conformal field theory, clarifying the precise evidence it provides for a Dirichlet (-2)brane, an identification made by Chaudhuri. The appendices contain extensive detail.

Shyamoli Chaudhuri

2005-03-02T23:59:59.000Z

210

Estimation and testing in targeted goup sequential covariate-adjusted randomized clinical trials  

E-Print Network [OSTI]

that A is binary and that Y is one-dimensional. Typical parameters of scientific interest are + = E{E(Y |A = 1, W) - E(Y |A = 0, W)} (additive scale, which we consider hereafter) or Ã? = log E{E(Y |A = 1, W)} - log E

Boyer, Edmond

211

The production of temperature and salinity variance and covariance : implications for mixing  

E-Print Network [OSTI]

Large-scale thermal forcing and freshwater fluxes play an essential role in setting temperature and salinity in the ocean. A number of recent estimates of the global oceanic freshwater balance as well as the global oceanic ...

Schanze, Julian J. (Julian Johannes)

2013-01-01T23:59:59.000Z

212

A general purpose program for the analysis of variance and the complete analysis of covariance  

E-Print Network [OSTI]

10 2. 3 The Mean Square Operation 3. la Completely Randomized Experiment 13 16 3. lb a'x b Factorial 16 3. 2a Repeated Observations Within a Randomized Block 17 3. 2b a x b x c Factorial 17 3. 3 Randomized Block with Factorial Treatments...: Box 15: Alter cells 5 and 5' to initial values required for the operation on the next group of items. The D operation is completed For a group of items. Box 16: Step up of (factor) run count f. Box 17: Control for entering square run. Box 18...

Strange, James Reid

1967-01-01T23:59:59.000Z

213

Carbon pools in Mediterranean forests: comparing eddy covariance and GOTILWA+ model results.  

E-Print Network [OSTI]

of water stress on ecosystem function leads to big discrepancies when modelling under these conditions. Recent advances allow us to successfully reproduce water and carbon balances during periods of stress ilex, Pinus ponderosa, and Fagus sylvatica, and varying degrees of water stress and ecosystem responses

Gracia, Carlos

214

Covariant density functional theory with two-phonon coupling in nuclei  

SciTech Connect (OSTI)

A full description of excited states within the framework of density functional theory requires energy dependent self energies. We present a new class of many-body models. It allows a parameter free description of the fragmentation of nuclear states induced by mode coupling of two-quasiparticle and two-phonon configurations. The method is applied for an investigation of low-lying dipole excitations in Sn isotopes with large neutron excess.

Ring, P.; Litvinova, E.; Tselyaev, V. [Physik Department, Technische Universitat Muenchen, D-85747 Garching (Germany) and State Key Lab Nucl. Phys. and Tech., School of Physics, Peking University, Beijing 100871 (China); GSI Helmholtzzentrum fuer Schwerionenforschung, 64291 Darmstadt (Germany); Nuclear Physics Department, St. Petersburg State University, 198504 St. Petersburg (Russian Federation)

2012-10-20T23:59:59.000Z

215

An analysis of Texas rainfall data and asymptotic properties of space-time covariance estimators  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . . . . . . . . . 26 9 A plot of residuals vs. predicted value . . . . . . . . . . . . . . . . . . 27 10 An example of the semivariogram from the regression residuals . . . . 28 11 A comparison between predictors on 4/23/2003 . . . . . . . . . . . . 30 12 A comparison...Rwith finite second moments is called mean square differentiable at t if {Z(t+hn)?Z(t)}/hn converges in L2 for all sequences {hn} converging to 0 as n ? ? with limit independent of {hn}. If such a limit exists, we call it Z?(t). To define higher-order mean...

Li, Bo

2009-06-02T23:59:59.000Z

216

Predicting New Hampshire Indoor Radon Concentrations from geologic information and other covariates  

SciTech Connect (OSTI)

Generalized geologic province information and data on house construction were used to predict indoor radon concentrations in New Hampshire (NH). A mixed-effects regression model was used to predict the geometric mean (GM) short-term radon concentrations in 259 NH towns. Bayesian methods were used to avoid over-fitting and to minimize the effects of small sample variation within towns. Data from a random survey of short-term radon measurements, individual residence building characteristics, along with geologic unit information, and average surface radium concentration by town, were variables used in the model. Predicted town GM short-term indoor radon concentrations for detached houses with usable basements range from 34 Bq/m{sup 3} (1 pCi/l) to 558 Bq/m{sup 3} (15 pCi/l), with uncertainties of about 30%. A geologic province consisting of glacial deposits and marine sediments, was associated with significantly elevated radon levels, after adjustment for radium concentration, and building type. Validation and interpretation of results are discussed.

Apte, M.G.; Price, P.N.; Nero, A.V.; Revzan, K.L.

1998-05-01T23:59:59.000Z

217

Predicting New Hampshire Indoor Radon Concentrations from geologic information and other covariates  

E-Print Network [OSTI]

1989," New Hampshire Division of Public Health Services andAddendum," New Hampshire Division of Public Health Services

Apte, M.G.

2011-01-01T23:59:59.000Z

218

Examining strategies to improve the carbon balance of corn/soybean agriculture using eddy covariance and  

E-Print Network [OSTI]

if it occurs rapidly. Consequently, there is intense interest in finding ways to damp projected changesExamining strategies to improve the carbon balance of corn/soybean agriculture using eddy There is much interest in the role that agricultural practices might play in sequestering carbon to help offset

Minnesota, University of

219

Co-variability of tropical cyclones in the North Atlantic and the eastern North Pacific  

E-Print Network [OSTI]

of accumulated cyclone energy (ACE) in the ENP. Therefore, we calculate the NA and ENP ACE indices by summingCo-variability of tropical cyclones in the North Atlantic and the eastern North Pacific Chunzai; published 30 December 2009. [1] In the Western Hemisphere, tropical cyclones (TCs) can form and develop

Wang, Chunzai

220

Eddy-covariance observations of the atmosphere-biosphere exchange of nitrogen oxides  

E-Print Network [OSTI]

from the mean of vertical wind speed and concentration.observed between vertical wind speed and temperature sincethe cospectral density of vertical wind speed and NO X as

Min, Kyung-Eun

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

The covariation of Northern Hemisphere summertime CO2 with surface temperature in boreal regions  

E-Print Network [OSTI]

in the Community Earth System Model: evaluation anduncertainties in Earth system models and for diagnosing the

2013-01-01T23:59:59.000Z

222

Covariant energy-momentum and an uncertainty principle for general relativity  

E-Print Network [OSTI]

We introduce a naturally-defined totally invariant spacetime energy expression for general relativity incorporating the contribution from gravity. The extension links seamlessly to the action integral for the gravitational field. The demand that the general expression for arbitrary systems reduces to the Tolman integral in the case of stationary bounded distributions, leads to the matter-localized Ricci integral for energy-momentum in support of the energy localization hypothesis. The role of the observer is addressed and as an extension of the special relativistic case, the field of observers comoving with the matter is seen to compute the intrinsic global energy of a system. The new localized energy supports the Bonnor claim that the Szekeres collapsing dust solutions are energy-conserving. It is suggested that in the extreme of strong gravity, the Heisenberg Uncertainty Principle be generalized in terms of spacetime energy-momentum.

F. I. Cooperstock; M. J. Dupre

2014-10-07T23:59:59.000Z

223

Covariant Spectator Theory of np scattering: Deuteron magnetic moment and form factors  

E-Print Network [OSTI]

The deuteron magnetic moment is calculated using two model wave functions obtained from 2007 high precision fits to $np$ scattering data. Included in the calculation are a new class of isoscalar $np$ interaction currents which are automatically generated by the nuclear force model used in these fits. After normalizing the wave functions, nearly identical predictions are obtained: model WJC-1, with larger relativistic P-state components, gives 0.863(2), while model WJC-2 with very small P-state components gives 0.864(2) These are about 1\\% larger than the measured value of the moment, 0.857 n.m., giving a new prediction for the size of the $\\rho\\pi\\gamma$ exchange, and other purely transverse interaction currents that are largely unconstrained by the nuclear dynamics. The physical significance of these results is discussed, and general formulae for the deuteron form factors, expressed in terms of deuteron wave functions and a new class of interaction current wave functions, are given.

Franz Gross

2014-04-06T23:59:59.000Z

224

Six-Week Time Series Of Eddy Covariance Co2 Flux At Mammoth Mountain,  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-g Grant ofRichardtonManagement, 2009) | Open

225

Six-Week Time Series Of Eddy Covariance CO2 Flux At Mammoth Mountain,  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty Ltd Jump to: navigation,PvtSouth Dakota) Jump to: navigation,Sitalcea

226

Dimension Reduction and Covariance Structure for Multivariate Data, Beyond Gaussian Assumption  

E-Print Network [OSTI]

is de ned as f(yijj ) = 8 >: y ij 1 , 6= 0; log(yij) , = 0: (2.6) Since the transformation parameter = is one dimensional, the 3rd step of the PSVD procedure becomes a simple optimization problem for a univariate concave function... on the criterion de ned in subsection 2.2.2. On the other hand, the second component is required by 1; 044 nonspiked-in genes without the transformation, but only by 38 with the transformation. We focus on the 6 spiked-in genes that require the two dimensional...

Maadooliat, Mehdi

2012-10-19T23:59:59.000Z

227

The periodic variations of the covariance and the effect on the probability of collision  

E-Print Network [OSTI]

position of any other catalogued space object fell within a specified box region centered on the estimated SS position, then a collision avoidance maneuver was considered. The dimensions of the conjunction box were + 5 km in the in- track and + 2 km.... Meteoroids are part of the interplanetary environment, and sweep through Earth orbital space at an average speed of 20 km/s. At any one instant, a total of 200 kg of meteoroid mass is within 2000 km of the Earth's surface. Most of this mass is concentrated...

Yang, Jung-Hwa

2002-01-01T23:59:59.000Z

228

E-Print Network 3.0 - artificial biocatalysis final Sample Search...  

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

on biocatalysis that I got due to the members of the "STW-begeleidingscommissie", Nico Boots, Theo Sonke, Jan... or filling in weird forms) and, finally, the students Freek and...

229

Technische Berichte Nr. 55 des Hasso-Plattner-Instituts fr  

E-Print Network [OSTI]

G¨ohringer (Fraunhofer IOSB) · Matthias Gries (Intel) · Werner Haas (Intel) · Prof. Dr. Hans) · Dr. Felix Salfner (SAP Innovation Center) · Prof. Dr. Bettina Schnor (Uni Potsdam) · Prof. Dr. Theo

Weske, Mathias

230

aldosterone receptor antagonists: Topics by E-print Network  

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

Felix Gru n, Theo K. Bammler, Bruce Blumberg, Kenneth E. Thummel, and David L. Eaton Departments of Pharmaceutics (C.Z., K.E.T.) and Environmental cancer, and most...

231

a2a receptor antagonists: Topics by E-print Network  

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

Felix Gru n, Theo K. Bammler, Bruce Blumberg, Kenneth E. Thummel, and David L. Eaton Departments of Pharmaceutics (C.Z., K.E.T.) and Environmental cancer, and most...

232

at1 receptor antagonist: Topics by E-print Network  

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

Felix Gru n, Theo K. Bammler, Bruce Blumberg, Kenneth E. Thummel, and David L. Eaton Departments of Pharmaceutics (C.Z., K.E.T.) and Environmental cancer, and most...

233

a1 receptor antagonist: Topics by E-print Network  

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

Felix Gru n, Theo K. Bammler, Bruce Blumberg, Kenneth E. Thummel, and David L. Eaton Departments of Pharmaceutics (C.Z., K.E.T.) and Environmental cancer, and most...

234

alpha-adrenergic receptor antagonist: Topics by E-print Network  

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

Felix Gru n, Theo K. Bammler, Bruce Blumberg, Kenneth E. Thummel, and David L. Eaton Departments of Pharmaceutics (C.Z., K.E.T.) and Environmental cancer, and most...

235

alpha2-noradrenergic receptor antagonists: Topics by E-print...  

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

Felix Gru n, Theo K. Bammler, Bruce Blumberg, Kenneth E. Thummel, and David L. Eaton Departments of Pharmaceutics (C.Z., K.E.T.) and Environmental cancer, and most...

236

a2a receptor antagonist: Topics by E-print Network  

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

Felix Gru n, Theo K. Bammler, Bruce Blumberg, Kenneth E. Thummel, and David L. Eaton Departments of Pharmaceutics (C.Z., K.E.T.) and Environmental cancer, and most...

237

alpha-1a receptor antagonist: Topics by E-print Network  

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

Felix Gru n, Theo K. Bammler, Bruce Blumberg, Kenneth E. Thummel, and David L. Eaton Departments of Pharmaceutics (C.Z., K.E.T.) and Environmental cancer, and most...

238

angiotensin receptor antagonists: Topics by E-print Network  

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

Felix Gru n, Theo K. Bammler, Bruce Blumberg, Kenneth E. Thummel, and David L. Eaton Departments of Pharmaceutics (C.Z., K.E.T.) and Environmental cancer, and most...

239

Generated using V3.0 of the official AMS LATEX templatejournal page layout FOR AUTHOR USE ONLY, NOT FOR SUBMISSION! Measurement and statistical modeling of the urban heat island of the city of Utrecht  

E-Print Network [OSTI]

Generated using V3.0 of the official AMS LATEX template­journal page layout FOR AUTHOR USE ONLY Netherlands) Theo Brandsma , Dirk Wolters Royal Netherlands Meteorological Institute, De Bilt, The Netherlands

Brandsma, Theo

240

Temperature field reconstruction of combustion flame based on high  

E-Print Network [OSTI]

that sound propagates in a different medium with different speed, and its theo- retical cornerstone-known materials of solid, liquid, and gaseous states, flame is a kind of plasma1,2 of which temper- ature is one

Note: This page contains sample records for the topic "leventis theo covary" 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

Model-Free Reconstruction of Excitatory Neuronal Connectivity from Calcium Imaging Signals  

E-Print Network [OSTI]

Stetter1,2,3 , Demian Battaglia1,3 *, Jordi Soriano4 , Theo Geisel1,2,3 1 Max Planck Institute, Battaglia D, Soriano J, Geisel T (2012) Model-Free Reconstruction of Excitatory Neuronal Connectivity from

Battaglia, Demian

242

Higher-Order Accurate, Positive Semi-definite Estimation of Large-Sample Covariance and Spectral Density Matrices  

E-Print Network [OSTI]

2003). Inference in ARCH and GARCH models with heavy-tailedinnovations Z t follow a GARCH(1,1) model. The values of the= 0.526. The values for the GARCH parameters were chosen to

Politis, D N

2009-01-01T23:59:59.000Z

243

Comparing nocturnal eddy covariance measurements to estimates of ecosystem respiration made by scaling chamber measurements at six coniferous boreal sites  

E-Print Network [OSTI]

construction respiration estimated as 0.25 times wood NPP [construction respiration estimated as 0.25 E times foliage NPP (construction respiration was 1.6-3.6 times greater than 0.25 times wood NPP

1997-01-01T23:59:59.000Z

244

3/7/2014 12:42 PM 1 Resolution and Covariance in Generalized Least Squares Inversion  

E-Print Network [OSTI]

both data and prior information to solve for a best-fitting set of model parameters. We review be supplemented with prior information ­ expectations about the nature of the solution that are not directly (GLS), is now central to much of the data processing that occurs in geophysics (and other fields, too

Menke, William

245

Design of high-order short-time approximations as a problem of matching the covariance of a Brownian motion  

E-Print Network [OSTI]

One of the outstanding problems in the numerical discretization of the Feynman-Kac formula calls for the design of arbitrary-order short-time approximations that are constructed in a stable way, yet only require knowledge of the potential function. In essence, the problem asks for the development of a functional analogue to the Gauss quadrature technique for one-dimensional functions. In PRE 69, 056701 (2004), it has been argued that the problem of designing an approximation of order \

Cristian Predescu

2005-08-28T23:59:59.000Z

246

Air-sea gas exchange of CO 2 and DMS in the North Atlantic by eddy covariance  

E-Print Network [OSTI]

measurements of the air/sea flux of dimethylsulfide over the2008a), Open ocean DMS air/sea fluxes over the eastern SouthE. S. Saltzman (2008b), DMS air/sea flux and gas transfer

Miller, Scott D; Marandino, Christa A; De Bruyn, Warren; Saltzman, Eric S; McCormick, C.

2009-01-01T23:59:59.000Z

247

IN SEARCH OF A PHYSIOLOGICAL BASIS FOR COVARIATIONS IN LIGHT-LIMITED AND LIGHT-SATURATED PHOTOSYNTHESIS1  

E-Print Network [OSTI]

generated reduc- tants (and generally not from changes in the oxygen- evolving PSII complexes). Specifically-SATURATED PHOTOSYNTHESIS1 Michael J. Behrenfeld2 National Aeronautics and Space Administration, Goddard Space Flight Center

Babin, Marcel

248

Global patterns of landatmosphere fluxes of carbon dioxide, latent heat, and sensible heat derived from eddy covariance,  

E-Print Network [OSTI]

(NEE), latent energy (LE), and sensible heat (H) based on remote sensing indices, climateGlobal patterns of landatmosphere fluxes of carbon dioxide, latent heat, and sensible heat derived

Chen, Jiquan

249

First direct measurements of formaldehyde flux via eddy covariance: implications for missing in-canopy formaldehyde sources  

E-Print Network [OSTI]

correlation plot for vertical wind speed (w) with both HCHOtemperature with vertical wind speed during half-hour? w · c where w is the vertical wind speed, c is the tracer

2011-01-01T23:59:59.000Z

250

Toward a consistency cross-check of eddy covariance flux–based and biometric estimates of ecosystem carbon balance  

E-Print Network [OSTI]

estimates of annual carbon sequestration in a Sitka spruce (carbon cycling in a temperate forest: Radiocarbon-based estimates of residence times, sequestration

2009-01-01T23:59:59.000Z

251

Ammonia at Blodgett Forest, Sierra Nevada, USA  

E-Print Network [OSTI]

of covariance in vertical wind speed with sonic temperature,of covariance in vertical wind speed with sonic temperature,

Fischer, Marc L.; Littlejohn, David

2007-01-01T23:59:59.000Z

252

Comment on Quantum teleportation via GHZ-like state  

E-Print Network [OSTI]

Recently Yang et al. [Int. J. Theo. Phys. 48 (2009) 516] have shown that an unknown qubit can be teleported by using a particular GHZ-like state as quantum channel. However, there are several errors in the calculation which lead to incorrect conclusions. The errors have been indicated and corrected. It is also noted that their scheme and the independently proposed teleportation scheme of Zhang et al. [Int. J. Theo. Phys. 48 (2009) 3331] uses quantum channel from the same family and any state of that family may be used for teleportation.

Anindita Banerjee; Kamal Patel; Anirban Pathak

2010-06-08T23:59:59.000Z

253

Use of principal components to aggregate rare variants in case-control and family-based association studies in the presence of multiple covariates  

E-Print Network [OSTI]

Hered 2010, 70:42-54. 5. Hoffmann TJ, Marini NJ, Witte JS:Rémi Kazma † , Thomas J Hoffmann † , John S Witte * FromSUP] method) proposed by Hoffmann et al. [5]. Briefly, the

Kazma, Rémi; Hoffmann, Thomas J; Witte, John S

2011-01-01T23:59:59.000Z

254

Regional Pathways to Technological Upgrading: The Impact of Agglomeration Economies and its Regional Covariates on Upgrading in Post-reforms India's Manufacturing Sector  

E-Print Network [OSTI]

Studies Gupta, Poonam, Rana Hasan, and Utsav Kumar. 2009. “58 Gupta, Poonam, Rana Hasan, and Utsav Kumar. 2009. “BigPress. Gupta, Poonam, Rana Hasan, and Utsav Kumar. 2009. “

Mallavarapu, Bravishwar

2013-01-01T23:59:59.000Z

255

Regional Pathways to Technological Upgrading: The Impact of Agglomeration Economies and its Regional Covariates on Upgrading in Post-reforms India's Manufacturing Sector  

E-Print Network [OSTI]

2000-01, operation. and 2005-06. Factory Size Average numberlevel microdata fpr and 2005-06. Firm Formation Rate Percentlevel microdata fpr and 2005-06. Import Input Ratio of value

Mallavarapu, Bravishwar

2013-01-01T23:59:59.000Z

256

Regional Pathways to Technological Upgrading: The Impact of Agglomeration Economies and its Regional Covariates on Upgrading in Post-reforms India's Manufacturing Sector  

E-Print Network [OSTI]

presence of electronics and automotive parts manufacturing.1999), automotive parts (Humphrey, 2003) and electronics (Automotive Equipment and Parts (128), Pharmaceuticals and Perfumes (121), Technical/Scientific and Photographic Equipment (118), Electronics (

Mallavarapu, Bravishwar

2013-01-01T23:59:59.000Z

257

Type I error and power of the mean and covariance structure confirmatory factor analysis for differential item functioning detection: Methodological issues and resolutions  

E-Print Network [OSTI]

and latent constructs (i.e., trait, denoted by 𝜉𝜉). In the MACS model, the observed response 𝑥𝑥𝑖𝑖 to an item i (i = 1, …, p) is represented as a linear function of an intercept 𝜏𝜏𝑖𝑖 , latent trait variables 𝜉𝜉𝑖𝑖 (j = 1, …, m), and a unique... is a p × 1 vector of observed responses (in group g), 𝜏𝜏𝑔𝑔 is a p × 1 vector of intercepts, 𝜉𝜉𝑔𝑔 is an m × 1 vector of latent trait variables, ?𝑔𝑔 is a p × m matrix of factor loadings, and 𝛿𝛿𝑔𝑔 is a p × 1 vector of unique factor...

Lee, Jaehoon

2009-01-01T23:59:59.000Z

258

Regional Pathways to Technological Upgrading: The Impact of Agglomeration Economies and its Regional Covariates on Upgrading in Post-reforms India's Manufacturing Sector  

E-Print Network [OSTI]

under the ‘License Raj’ policies India’s economy grew at abase. Development policy in India needs to recognize theUrban development policy in India seems to be obsessed with

Mallavarapu, Bravishwar

2013-01-01T23:59:59.000Z

259

Regional Pathways to Technological Upgrading: The Impact of Agglomeration Economies and its Regional Covariates on Upgrading in Post-reforms India's Manufacturing Sector  

E-Print Network [OSTI]

2002. “Does Economic Liberalisation Endanger Indigenous2002. “Does Economic Liberalisation Endanger Indigenous

Mallavarapu, Bravishwar

2013-01-01T23:59:59.000Z

260

Intercomparison of Sensible Heat Flux from Large Aperture Scintillometer and Eddy Covariance Methods: Field Experiment over a Homogeneous Semi-arid Region  

E-Print Network [OSTI]

of satellite remote sensing sensible heat-?ux estimates dueremote sensing algorithms. A typical approach identi?es spectral bands particularly sensitive to surface heat ?

Zeweldi, Dawit A.; Gebremichael, Mekonnen; Wang, Junming; Sammis, Theodore; Kleissl, Jan; Miller, David

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

Covariation of climate and long-term erosion rates across a steep rainfall gradient on the Hawaiian island of Kaua'i  

E-Print Network [OSTI]

Erosion of volcanic ocean islands creates dramatic landscapes, modulates Earth’s carbon cycle, and delivers sediment to coasts and reefs. Because many volcanic islands have large climate gradients and minimal variations ...

Ferrier, Ken L.

262

Scale Covariance of Fractal Sets and Measures, A Differential Approach to the Box-Counting Function of a Fractal, with Applications  

E-Print Network [OSTI]

73 The devil’s staircase. . . . . . . . . . . . .defined, dubbed the devil’s staircase, which was rife withcurves such as the “Devil’s Staircase”, and other sets with

Quinn, John Roosevelt

2013-01-01T23:59:59.000Z

263

Design and Environmental Analysis (DEA) combines innovative design thinking with insightful design research to understand how the built  

E-Print Network [OSTI]

+Will Sustainability Designer, HOK Architects Event Planner, U.S. Green Building Council Lighting Designer, Theo Kondos-Certified Designer, Leo A. Daly Development Coordinator, Urban Green Council Facility Planner, Perkins, sustainable and healthy futures by design. Design Is About Making Things Happen, Not Just Making Things. Good

Chen, Tsuhan

264

Design of life-size haptic environments Yoky Matsuoka  

E-Print Network [OSTI]

, or software failure, a brake-actuated device is inherently incapable of exceeding the kinetic energy of motion while still allowing us to simulate virtual objects (i.e. to constrain the user's motion inside comparisons to active devices. Theo- retically, we demonstrate that brake-actuated devices surprisingly

Matsuoka, Yoky

265

Aiming to bring together media scholars from the United States, Canada, and Germany, the conference continues a series of symposia that began in 2007. After ,,Re-Reading McLuhan. An International Conference on Media and  

E-Print Network [OSTI]

Aiming to bring together media scholars from the United States, Canada, and Germany, the conference of Paderborn, Germany Concept and Organisation: Hannelore Bublitz, Irina Kaldrack, Theo Röhle, Hartmut Winkler March 29 ­ 31, 2012 University of Paderborn, Germany Room B 3.231 #12;02:00 | Start / Introduction 02

Paderborn, Universität

266

AROUND KING'S RANK-ONE THEOREMS: FLOWS AND ELISE JANVRESSE, THIERRY DE LA RUE, AND VALERY RYZHIKOV  

E-Print Network [OSTI]

AROUND KING'S RANK-ONE THEOREMS: FLOWS AND Zn -ACTIONS ´ELISE JANVRESSE, THIERRY DE LA RUE, AND VALERY RYZHIKOV Abstract. We study the generalizations of Jonathan King's rank-one theo- rems (Weak-Closure Theorem and rigidity of factors) to the case of rank-one R-actions (flows) and rank-one Zn-actions. We

Paris-Sud XI, Université de

267

The Institute for Critical Technology and Applied Science at Virginia Tech supports and promotes cutting-edge research at the intersection of engineering, science, and medicine. Please visit www.ictas.vt.edu.  

E-Print Network [OSTI]

, and limited environmental impact. For electric- ity generation, a variety of renewable alternatives exist to achieve reliable energy systems with long-term availability, reduced environmental impact, and lower cost metallofullerene molecules with properties that theo- retically yield a two-fold increase in organic solar cell

Beex, A. A. "Louis"

268

Theoretical White Dwarf Spectra on Demand: E. Ringat and T. Rauch  

E-Print Network [OSTI]

program for the calculation of model atmospheres of hot, compact objects. In the framework of the German Astrophysical Virtual Observatory (GAVO), theoretical spectral energy distributions (SEDs) can be downloaded via - Ca (solar abundances) and available via TheoSSA. WHITE DWARF MODEL ATMOSPHERES IN NLTE The Model

Barnstedt, Jürgen

269

Accurate Eye Center Location through Invariant Isocentric Patterns  

E-Print Network [OSTI]

1 Accurate Eye Center Location through Invariant Isocentric Patterns Roberto Valenti, Student Member, IEEE, and Theo Gevers, Member, IEEE, Abstract--Locating the center of the eyes allows for valuable information to be captured and used in a wide range of applications. Accurate eye center location

Gevers, Theo

270

ESCA studies on recoil implanted aluminum substrates  

E-Print Network [OSTI]

in Table III (p. 19). Again, the values are in excellent agreement with the theo- retical value of 0. 12. Thus, the gold secondaries do not cause sel- ective sputtering of either alum1num or oxygen in the A1203 layer. For a change 1n argon 1on dose of 1...

Mallya, Narayani R.

1980-01-01T23:59:59.000Z

271

A NEW CLASS OF RAMSEY-CLASSIFICATION THEOREMS AND THEIR APPLICATIONS IN THE  

E-Print Network [OSTI]

A NEW CLASS OF RAMSEY-CLASSIFICATION THEOREMS AND THEIR APPLICATIONS IN THE TUKEY THEORY OF ULTRAFILTERS NATASHA DOBRINEN AND STEVO TODORCEVIC Abstract. Motivated by Tukey classification problems-classification theo- rems to completely classify all Rudin-Keisler equivalence classes of ultrafilters which are Tukey

Dobrinen, Natasha

272

Contrib. Plasma Phys. 53, No. 45, 397 405 (2013) / DOI 10.1002/ctpp.201200094 Electron screening effect on stellar thermonuclear fusion  

E-Print Network [OSTI]

effect on stellar thermonuclear fusion Alexander Y. Potekhin1,2 and Gilles Chabrier2,3 1 Ioffe Physical thermonuclear reactions for various stellar objects, namely in the liquid envelopes of neutron stars. In addition, we examine some recent unconventional theo- retical results on stellar thermonuclear fusions

273

De Bilt, 2011 | Scientific report; WR 2011-01 Parallel air temperature measurements  

E-Print Network [OSTI]

at the KNMI observatory in De Bilt (the Netherlands) May 2003 - June 2005 | March 14, 2011 Page 6 of 56 #12 observatory in De Bilt (the Netherlands) May 2003 - June 2005 Theo Brandsma #12;#12;Parallel air temperature measurements at the KNMI observatory in De Bilt (the Netherlands) May 2003 - June 2005 Version 1.0 Date March

Haak, Hein

274

K.-H. Spatschek Associate Editors  

E-Print Network [OSTI]

Screening Effect on Stellar Thermonuclear Fusion A. Y. Potekhin1,2 and G. Chabrier2,3 1 Ioffe Physical. In addition, we examine some recent unconventional theo- retical results on stellar thermonuclear fusionsA, Weinheim 1 Introduction Thermonuclear reactions play a crucial role in stellar evolution. Nuclear fusion

275

Comparison between SuperDARN flow vectors and equivalent ionospheric currents from ground magnetometer arrays  

E-Print Network [OSTI]

to Fukushima's theorem [Fukushima, 1969, 1976] the magnetic effects on the ground due to the field aligned currents within the E region of the ionosphere according to Fukushima's theo- rem for a uniformly above the surface of the Earth [Fukushima, 1969, 1976; Lester et al., 1993]. Thus, a macroscopic picture

California at Berkeley, University of

276

An iterative geostatistical inverse method for steady flow in the vadose zone  

E-Print Network [OSTI]

the governing flow equation and by updating the residual covariance and cross- covariance functions reflectrometers, and electrical resistivity tomography. Poorly sorted alluvial deposits, con- glomerates

277

Measurement of the W Boson Mass with the D0 Run II Detector using the Electron P(T) Spectrum  

SciTech Connect (OSTI)

This thesis is a description of the measurement of the W boson mass using the D0 Run II detector with 770 pb{sup -1} of p{bar p} collision data. These collisions were produced by the Tevatron at {radical}s = 1.96 TeV between 2002 and 2006. We use a sample of W {yields} e{nu} and Z {yields} ee decays to determine the W boson mass with the transverse momentum distribution of the electron and the transverse mass distribution of the boson. We measure M{sub W} = XXXXX {+-} 37 (stat.) {+-} 26 (sys. theo.) {+-} 51 (sys. exp.) MeV = XXXXX {+-} 68 MeV with the transverse momentum distribution of the electron and M{sub W} = XXXXX {+-} 28 (stat.) {+-} 17 (sys. theo.) {+-} 51 (sys. exp.) MeV = XXXXX {+-} 61 MeV with the transverse mass distribution.

Andeen, Timothy R., Jr.; /Northwestern U.

2008-06-01T23:59:59.000Z

278

Discontinuous Galerkin Finite Element Method for the Nonlinear Hyperbolic Problems with Entropy-Based Artificial Viscosity Stabilization  

E-Print Network [OSTI]

. Theo- retically, solutions may be obtained to an arbitrarily high order of accuracy. While the DG FEM was proposed in the early 1970?s by Reed and Hill for the neutron transport equation [10], it was not used for CFD simulations until the early 1990... period of this work. vii NOMENCLATURE BC?s boundary conditions BDF backward differentiation formula CD centered difference CFD computational fluid dynamics CFL Courant-Friedrichs-Lewy CG continuous Galerkin CN Crank-Nicholson DG discontinuous...

Zingan, Valentin Nikolaevich

2012-07-16T23:59:59.000Z

279

On the stress distribution in a thin rectangular plate subjected to shear  

E-Print Network [OSTI]

Average Stress, g difference in these Stresses, %max (Theoretica1) ) 'f max (Experimental), gmax (Exeter. ) vs g of C~ (Theo. ), ~rs. ~ 0 ~ ~ 0 Values of "+~" Ca1culated from ELemen- tary Beam Theory for Plate- (2 x 860) ~ ~ ~ ~ ~ /1 and Mrs t 1...) '( thin rectangu3. ar plate The theory of photoelasticity vas employed throughout the observations Ordinarily, it is assumed Chat such a shear stress is distributed uniformly over the section normal to the axis of the body~ in which case...

Travis, Darol Duane

2012-06-07T23:59:59.000Z

280

The Organic Rankine Cycle System, Its Application to Extract Energy From Low Temperature Waste Heat  

E-Print Network [OSTI]

in a Rankine Cycle to extract The theoretical Rankine Cycle efficiency (~R) is energy from low temperature waste heat. By 1968, a defined as: 3.8 megawatt unit using R-11 refrigerant was placed in commercial operation in Japan (2) and currently ?ZR.... Figure 2 compares the theo The basic Organic Rankine Cycle may be described retical Rankine efficiency for several hydrocarbons, using the Pressure-Enthalpy Diagram of a typical fluorocarbons and water within the evaporating working fluid (R-11). (See...

Sawyer, R. H.; Ichikawa, S.

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

359.ps  

E-Print Network [OSTI]

Jul 24, 2001 ... Department of Industrial Engineering. Bilkent University ...... Varying Covariances

2001-07-24T23:59:59.000Z

282

Eddy covariance fluxes and vertical concentration gradient measurements of NO and NO[subscript 2] over a ponderosa pine ecosystem: observational evidence for within-canopy chemical removal of NO[subscript x  

E-Print Network [OSTI]

Exchange of NO[subscript x] (NO+NO[subscript 2]) between the atmosphere and biosphere is important for air quality, climate change, and ecosystem nutrient dynamics. There are few direct ecosystem-scale measurements of the ...

Min, K.-E.

283

FINAL REPORT: EDDY-COVARIANCE FLUX TOWER AND TRACER TECHNOLOGY SUPPORT FOR THE UNIVERSITY OF GEORGIA PROPOSAL: FROM TOWER TO PIXEL: INTEGRATION OF PATCH-SIZE NEE USING EXPERIMENTAL MODELING FOOTPRINT ANALYSIS.  

SciTech Connect (OSTI)

Brookhaven National Laboratory has been funded since October of 2000 to provide assistance to the University of Georgia in conducting footprint analyses of individual towers based on meteorology and trace gas measurements. Brookhaven researchers conducted air flow measurements using perfluorocarbon tracers and meteorological instrumentation for three experimental campaigns at an AmeriFlux research site maintained by Dr. Monique Leclerc near Gainesville, FL. In addition, BNL provided assistance with remote data collection and distribution from remote field sites operated by Dr. John Hom of the US Forest Service in the Pine Barrens of New Jersey and at FACE research sites in North Carolina and Wisconsin.

LEWIN,K.F.; NAGY, J.; WATSON, T.B.

2007-09-01T23:59:59.000Z

284

Combat-related blast injuries : injury types and outcomes  

E-Print Network [OSTI]

blast and PTSD diagnosis as covariates. The interaction of PTSD and injury severity was initially assessed prior to model

Eskridge, Susan Lindsay

2011-01-01T23:59:59.000Z

285

Particle Energy Spectrum, Revisited from a Counting Statistics Perspective  

SciTech Connect (OSTI)

This document is a slide show type presentation of a new covariance estimation for gamma spectra and neutron cross section.

Yuan, D., Marks, D. G., Guss, P. P.

2012-07-16T23:59:59.000Z

286

Characteristic hypersurfaces in a relativistic superfluid theory  

E-Print Network [OSTI]

By discussing the Cauchy problem, we determine the covariant equation of the characteristic hypersurfaces in a relativistic superfluid theory.

B. Linet

1998-12-16T23:59:59.000Z

287

Ecoclimate: Variations, Interactions, and Teleconnections  

E-Print Network [OSTI]

the covariance of vertical wind speed and concentration tothat the mean vertical velocity wind speed is zero on time

Swann, Abigail Lynn Segal

2010-01-01T23:59:59.000Z

288

Against Intentionalism Bernhard Nickel bnickel@fas.harvard.edu  

E-Print Network [OSTI]

acceptable terms.1 If the phenomenol- 1 For example, by giving a causal co-variation account of content

Nickel, Bernhard

289

Lagrangian fluid mechanics  

E-Print Network [OSTI]

The method of Lagrangians with covariant derivative (MLCD) is applied to a special type of Lagrangian density depending on scalar and vector fields as well as on their first covariant derivatives. The corresponding Euler-Lagrange's equations and energy-momentum tensors are found on the basis of the covariant Noether's identities.

Sawa Manoff

2002-05-07T23:59:59.000Z

290

doc. RNDr. Arnost Komarek, Ph.D. Dept. of Probability and Mathematical Statistics  

E-Print Network [OSTI]

Data Cars2004 (subset) Data on vehicles that were on the U.S. market in 2004. Only non-hybrid cars. Categorical Covariates 1. One categorical covariate and one-way ANOVA Data Cars2004 (subset) 101520 Drive Data Cars2004 (subset) 101520 Drive Consumption[l/100km] front rear 4x4 8 V. Categorical Covariates 1

Komarek, Arnost

291

Semiclassical framework for the calculation of transport anisotropies  

E-Print Network [OSTI]

and well-known phenomenon1?3 with applications in spintronics.4,5 Although the experimental observation of this anisotropic magnetoresistance #1;AMR#2; is rather direct?first accomplished as early as 1857?its theo- retical understanding is far from...; relies on calculating the transport relaxation time #2; from the scattering amplitudes w#1;k#1; ,k#1;#1;#2; between two states on the Fermi surface using 1 #2; =#3; d2k#1;#1;2#3;#2;2w#1;k#1;,k#1;#1;#2;#4;1 ? cos #4;k#1;k#1;#1;#5; . #1;1...

Vyborny, Karel; Kovalev, Alexey A.; Sinova, Jairo; Jungwirth, T.

2009-01-01T23:59:59.000Z

292

Determination of $\\alpha_S$ using OPAL hadronic event shapes at $\\sqrt{s}$ = 91 ? 209 GeV and resummed NNLO calculations  

E-Print Network [OSTI]

Hadronic event shape distributions from e+e? annihilation measured by the OPAL experiment at centre-of-mass energies between 91 GeV and 209 GeV are used to determine the strong coupling ?S. The results are based on QCD predictions complete to the next-to-next-to-leading order (NNLO), and on NNLO calculations matched to the resummed next-to-leading-log-approximation terms (NNLO+NLLA). The combined NNLO result from all variables and centre-of-mass energies is ?S(mZ0) = 0.1201 ± 0.0008(stat.) ± 0.0013(exp.) ± 0.0010(had.) ± 0.0024(theo.). while the combined NNLO+NLLA result is ?S(mZ0) = 0.1189 ± 0.0008(stat.) ± 0.0016(exp.) ± 0.0010(had.) ± 0.0036(theo.). The completeness of the NNLO and NNLO+NLLA results with respect to missing higher order contributions, studied by varying the renormalization scale, is improved compared to previous results based on NLO or NLO+NLLA predictions only. The observed energy dependence of ?S agrees with the QCD prediction of asymptotic freedom and excludes the absence o...

Abbiendi, G; Akesson, P F; Alexander, G; Anagnostou, G; Anderson, K J; Asai, S; Axen, D; Bailey, I; Barberio, E; Barillari, T; Barlow, R J; Batley, R J; Bechtle, P; Behnke, T; Bell, K W; Bell, P J; Bella, G; Bellerive, A; Benelli, G; Bethke, S; Biebel, O; Boeriu, O; Bock, P; Boutemeur, M; Braibant, S; Brown, R M; Burckhart, H J; Campana, S; Capiluppi, P; Carnegie, R K; Carter, A A; Carter, J R; Chang, C Y; Charlton, D G; Ciocca, C; Csilling, A; Cuffiani, M; Dado, S; Dallavalle, M; De Roeck, A; De Wolf, E A; Desch, K; Dienes, B; Dubbert, J; Duchovni, E; Duckeck, G; Duerdoth, I P; Etzion, E; Fabbri, F; Ferrari, P; Fiedler, F; Fleck, I; Ford, M; Frey, A; Gagnon, P; Gary, J W; Geich-Gimbel, C; Giacomelli, G; Giacomelli, P; Giunta, M; Goldberg, J; Gross, E; Grunhaus, J; Gruwe, M; Gupta, A; Hajdu, C; Hamann, M; Hanson, G G; Harel, A; Hauschild, M; Hawkes, C M; Hawkings, R; Herten, G; Heuer, R D; Hill, J C; Horvath, D; Igo-Kemenes, P; Ishii, K; Jeremie, H; Jovanovic, P; Junk, T R; Kanzaki, J; Karlen, D; Kawagoe, K; Kawamoto, T; Keeler, R K; Kellogg, R G; Kennedy, B W; Kluth, S; Kobayashi, T; Kobel, M; Komamiya, S; Kramer, T; Krasznahorkay, Jr A; Krieger, P; von Krogh, J; Kuhl, T; Kupper, M; Lafferty, G D; Landsman, H; Lanske, D; Lellouch, D; Letts, J; Levinson, L; Lillich, J; Lloyd, S L; Loebinger, F K; Lu, J; Ludwig, A; Ludwig, J; Mader, W; Marcellini, S; Martin, A J; Mashimo, T; Mattig, P; McKenna, J; McPherson, R A; Meijers, F; Menges, W; Merritt, F S; Mes, H; Meyer, N; Michelini, A; Mihara, S; Mikenberg, G; Miller, D J; Mohr, W; Mori, T; Mutter, A; Nagai, K; Nakamura, I; Nanjo, H; Neal, H A; O’Neale, S W; Oh, A; Oreglia, M J; Orito, S; Pahl, C; Pasztor, G; Pater, J R; Pilcher, J E; Pinfold, J; Plane, D E; Pooth, O; Przybycien, M; Quadt, A; Rabbertz, K; Rembser, C; Renkel, P; Roney, J M; Rossi, A M; Rozen, Y; Runge, K; Sachs, K; Saeki, T; Sarkisyan, E K G; Schaile, A D; Schaile, O; Scharff-Hansen, P; Schieck, J; Schorner-Sadenius, T; Schroder, M; Schumacher, M; Seuster, R; Shears, T G; Shen, B C; Sherwood, P; Skuja, A; Smith, A M; Sobie, R; Soldner-Rembold, S; Spano, F; Stahl, A; Strom, D; Strohmer, R; Tarem, S; Tasevsky, M; Teuscher, R; Thomson, M A; Torrence, E; Toya, D; Trigger, I; Trocsanyi, Z; Tsur, E; Turner-Watson, M F; Ueda, I; Ujvari, B; Vollmer, C F; Vannerem, P; Vertesi, R; Verzocchi, M; Voss, H; Vossebeld, J; Ward, C P; Ward, D R; Watkins, P M; Watson, A T; Watson, N K; Wells, P S; Wengler, T; Wermes, N; Wilson, G W; Wilson, J A; Wolf, G; Wyatt, T R; Yamashita, S; Zer-Zion, D; Zivkovic, L

2011-01-01T23:59:59.000Z

293

Determination of ?S using OPAL hadronic event shapes at sqrt(s) = 91 - 209 GeV and resummed NNLO calculations  

E-Print Network [OSTI]

Hadronic event shape distributions from e+e- annihilation measured by the OPAL experiment at centre-of-mass energies between 91 GeV and 209 GeV are used to determine the strong coupling {\\alpha}S. The results are based on QCD predictions complete to the next-to- next-to-leading order (NNLO), and on NNLO calculations matched to the resummed next-to-leading-log-approximation terms (NNLO+NLLA). The combined NNLO result from all variables and centre-of-mass energies is {\\alpha}S(mZ0) = 0.1201 {\\pm} 0.0008(stat.) {\\pm} 0.0013(exp.) {\\pm} 0.0010(had.) {\\pm} 0.0024(theo.). while the combined NNLO+NLLA result is {\\alpha}S(mZ0) = 0.1189 {\\pm} 0.0008(stat.) {\\pm} 0.0016(exp.) {\\pm} 0.0010(had.) {\\pm} 0.0036(theo.). The completeness of the NNLO and NNLO+NLLA results with respect to missing higher order contributions, studied by varying the renormalization scale, is improved compared to previous results based on NLO or NLO+NLLA predictions only. The observed energy dependence of {\\alpha}S agrees with the QCD prediction of asymptotic freedom and excludes the absence of running.

The OPAL Collaboration

2011-08-24T23:59:59.000Z

294

A Hybrid Ensemble Kalman Filter for Nonlinear Dynamics  

E-Print Network [OSTI]

. vii NOMENCLATURE ? Scalar weighting on regularization terms DC Data covariance matrix dM s ,C Cross-covariance matrix between data and model parameters ?C Model covariance matrix kobs,D Ensemble of the observation data obsd... Observation data vector cald Calculated or theoretical observation vector ? Noise in the data )(og Forward model operator H Measurement matrix K Absolute permeability rk Relative permeability sm Vector of static model variables dm...

Watanabe, Shingo

2011-02-22T23:59:59.000Z

295

E-Print Network 3.0 - analyzing nonstationary financial Sample...  

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

the nonstationary model and analyze the degree and nature of the nonstationarity in the data... Spatial Modelling Using a New Class of Nonstationary Covariance Functions...

296

axial-vector matrix elements: Topics by E-print Network  

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

creation model. Eef van Beveren 2006-02-28 47 Nuclear matrix elements in neutrinoless double beta decay: beyond mean-field covariant density functional theory Nuclear Experiment...

297

A polynomial case of cardinality constrained quadratic optimization ...  

E-Print Network [OSTI]

Aug 27, 2010 ... In the context of subset selection problem, Das and Kempe [5] proposed an approximate algorithm for the case where the covariance ...

2010-08-27T23:59:59.000Z

298

applying generalized stochastic: Topics by E-print Network  

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

GENERATORS Rick Katz Institute for Study Weather Generators (2) Generalized Linear Models (GLMs) (3) GLM Weather Generator (4) Application to Daily ("Covariates") Not...

299

A Scaled Difference Chi-square Test Statistic for Moment Structure Analysis  

E-Print Network [OSTI]

with small samples: Test statistics. Multivariate BehavioralKano, Y. (1992). Can test statistics in covariance structurewith applications in statistics and econometrics . New York:

Albert Satorra; Peter Bentler

2011-01-01T23:59:59.000Z

300

National High Magnetic Field Laboratory - Site Index  

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

Learning Lab-wide Media and Public Affairs Personnel Search Covariance NMR Metabolomics Web Portal Cryogenics Curricula D DC Field Program Dictionary Directions Gainesville Site...

Note: This page contains sample records for the topic "leventis theo covary" 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

accelerator configuration management: Topics by E-print Network  

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

recurrence satisfied by the Stirling numbers of the second kind. Abrams, Aaron; Hower, Valerie 2010-01-01 198 Covariant Uniform Acceleration Physics (arXiv) Summary: We...

302

Framework for Assessing Viability of Threatened and Endangered Chinook Salmon and Steelhead in the Sacramento–San Joaquin Basin  

E-Print Network [OSTI]

ISAB 2005-2. Portland, OR. Bjornstad ON, Ims RA, Lambin X.covariance function (Bjornstad et al. 1999). Of particular

2007-01-01T23:59:59.000Z

303

GEORGIOS HOMEPAGE  

E-Print Network [OSTI]

Multi-output Gaussian process emulator with nonseparable auto-covariance functions ... with stochastic inputs, Journal of Computational Physics, 259, 114–

304

Grouping and Dimensionality Reduction by Locally Linear Embedding  

E-Print Network [OSTI]

. - - = ml lm k jk j C C w , 1 1 =j kjk wC 1 Note: If the covariance matrix is singular or nearly singular

Elkan, Charles

305

nus.edu.sg  

E-Print Network [OSTI]

and Defeng Sun. †. June 12, 2008. Abstract. In many applications in finance, insurance, and reinsurance, one seeks a solution of find- ing a covariance matrix

2008-06-13T23:59:59.000Z

306

autoregressive spectral estimation: Topics by E-print Network  

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

Estimation: A Tunable High-Resolution Spectral Estimator CiteSeer Summary: Traditional maximum entropy spectral estimation determines a power spectrum from covariance estimates....

307

Electric dipole response of 208Pb from proton inelastic scattering: constraints on neutron skin thickness and symmetry energy  

E-Print Network [OSTI]

The electric dipole (E1) response of 208Pb has been precisely determined by measuring Coulomb excitation induced by proton scattering at very forward angles. The electric dipole polarizability, defined as inverse energy-weighted sum rule of the E1 strength, has been extracted as 20.1+-0.6 fm^3. The data can be used to constrain the neutron skin thickness of 208Pb to 0.168(+-0.009)_expt(+-0.013)_theo(+-0.021)_est fm, where the subscript "expt" refers to the experimental uncertainty, "theor" to the theoretical confidence band and "est" to the uncertainty associated with the estimation of the symmetry energy at the saturation density. In addition, a constraint band has been extracted in the plane of the symmetry energy (J) and its slope parameter (L) at the saturation density.

A. Tamii; P. von Neumann-Cosel; I. Poltoratska

2013-10-02T23:59:59.000Z

308

Measurement of beauty and charm production in deep inelastic scattering at HERA and measurement of the beauty-quark mass  

E-Print Network [OSTI]

The production of beauty and charm quarks in ep interactions has been studied with the ZEUS detector at HERA for exchanged four-momentum squared 5 energy and pseudorapidity were measured and compared with next-to-leading-order QCD calculations. The beauty and charm contributions to the proton structure functions were extracted from the double-differential cross section as a function of x and Q^2. The running beauty-quark mass, m_b at the scale m_b, was determined from a QCD fit at next-to-leading order to HERA data for the first time and found to be 4.07 \\pm 0.14 (fit} ^{+0.01}_{-0.07} (mod.) ^{+0.05}_{-0.00} (param.) ^{+0.08}_{-0.05} (theo) GeV.

ZEUS collaboration; H. Abramowicz; I. Abt; L. Adamczyk; M. Adamus; R. Aggarwal; S. Antonelli; O. Arslan; V. Aushev; Y. Aushev; O. Bachynska; A. N. Barakbaev; N. Bartosik; O. Behnke; J. Behr; U. Behrens; A. Bertolin; S. Bhadra; I. Bloch; V. Bokhonov; E. G. Boos; K. Borras; I. Brock; R. Brugnera; A. Bruni; B. Brzozowska; P. J. Bussey; A. Caldwell; M. Capua; C. D. Catterall; J. Chwastowski; J. Ciborowski; R. Ciesielski; A. M. Cooper-Sarkar; M. Corradi; F. Corriveau; G. D'Agostini; R. K. Dementiev; R. C. E. Devenish; G. Dolinska; V. Drugakov; S. Dusini; J. Ferrando; J. Figiel; B. Foster; G. Gach; A. Garfagnini; A. Geiser; A. Gizhko; L. K. Gladilin; O. Gogota; Yu. A. Golubkov; J. Grebenyuk; I. Gregor; G. Grzelak; O. Gueta; M. Guzik; W. Hain; G. Hartner; D. Hochman; R. Hori; Z. A. Ibrahim; Y. Iga; M. Ishitsuka; A. Iudin; F. Januschek; I. Kadenko; S. Kananov; T. Kanno; U. Karshon; M. Kaur; P. Kaur; L. A. Khein; D. Kisielewska; R. Klanner; U. Klein; N. Kondrashova; O. Kononenko; Ie. Korol; I. A. Korzhavina; A. Kota?ski; U. Kötz; N. Kovalchuk; H. Kowalski; O. Kuprash; M. Kuze; B. B. Levchenko; A. Levy; V. Libov; S. Limentani; M. Lisovyi; E. Lobodzinska; W. Lohmann; B. Löhr; E. Lohrmann; A. Longhin; D. Lontkovskyi; O. Yu. Lukina; J. Maeda; I. Makarenko; J. Malka; J. F. Martin; S. Mergelmeyer; F. Mohamad Idris; K. Mujkic; V. Myronenko; K. Nagano; A. Nigro; T. Nobe; D. Notz; R. J. Nowak; K. Olkiewicz; Yu. Onishchuk; E. Paul; W. Perla?ski; H. Perrey; N. S. Pokrovskiy; A. S. Proskuryakov; M. Przybycie?; A. Raval; P. Roloff; I. Rubinsky; M. Ruspa; V. Samojlov; D. H. Saxon; M. Schioppa; W. B. Schmidke; U. Schneekloth; T. Schörner-Sadenius; J. Schwartz; L. M. Shcheglova; R. Shehzadi; R. Shevchenko; O. Shkola; I. Singh; I. O. Skillicorn; W. S?omi?ski; V. Sola; A. Solano; A. Spiridonov; L. Stanco; N. Stefaniuk; A. Stern; T. P. Stewart; P. Stopa; J. Sztuk-Dambietz; D. Szuba; J. Szuba; E. Tassi; T. Temiraliev; K. Tokushuku; J. Tomaszewska; A. Trofymov; V. Trusov; T. Tsurugai; M. Turcato; O. Turkot; T. Tymieniecka; A. Verbytskyi; O. Viazlo; R. Walczak; W. A. T. Wan Abdullah; K. Wichmann; M. Wing; G. Wolf; S. Yamada; Y. Yamazaki; N. Zakharchuk; A. F. ?arnecki; L. Zawiejski; O. Zenaiev; B. O. Zhautykov; N. Zhmak; D. S. Zotkin

2014-10-21T23:59:59.000Z

309

Improved protocols of secure quantum communication using W states  

E-Print Network [OSTI]

Recently, Hwang et al. [Eur. Phys. J. D. 61, 785 (2011)] and Yuan et al. [Int. J. Theo. Phys. 50, 2403 (2011)] have proposed two efficient protocols of secure quantum communication using 3-qubit and 4-qubit symmetric W state respectively. These two dense coding based protocols are generalized and their efficiencies are considerably improved. Simple bounds on the qubit efficiency of deterministic secure quantum communication (DSQC) and quantum secure direct communication (QSDC) protocols are obtained and it is shown that dense coding is not essential for designing of maximally efficient DSQC and QSDC protocols. This fact is used to design maximally efficient protocols of DSQC and QSDC using 3-qubit and 4-qubit W states.

Chitra Shukla; Anindita Banerjee; Anirban Pathak

2012-04-20T23:59:59.000Z

310

JOURNAL OF SCIENCE & TECHNOLOGY No. 78A -2010 APPLICATION OF COMPUTATIONAL MODEL  

E-Print Network [OSTI]

nng (tính theo % khi lng) mi v trí tính toán và s khuch tán ca ôxyt nhôm trong x lng là khâu quyt nh tc ca quá trình hòa tan. Tc hòa tan ca ôxyt nhôm trong x lng c xác nh da trên kt qu chy mô hình và quan n s hòa tan tp cht ôxyt nhôm vào x lng trong luyn thép. I. INTRODUCTION Modern technology makes

Thomas, Brian G.

311

Study of Bbar to Xu l nubar Decays in BBbar Events Tagged by a Fully Reconstructed B-meson Decay and Determination of |V_{ub}|  

SciTech Connect (OSTI)

We report measurements of partial branching fractions for inclusive charmless semileptonic B decays {bar B} {yields} X{sub u}{ell}{bar {nu}}, and the determination of the CKM matrix element |V{sub ub}|. The analysis is based on a sample of 467 million {Upsilon}(4S) {yields} B{bar B} decays recorded with the BABAR detector at the PEP-II e{sup +}e{sup -} storage rings. We select events in which the decay of one of the B mesons is fully reconstructed and an electron or a muon signals the semileptonic decay of the other B meson. We measure partial branching fractions {Delta}{Beta} in several restricted regions of phase space and determine the CKM element |V{sub ub}| based on four different QCD predictions. For decays with a charged lepton momentum p*{sub {ell}} > 1.0 GeV in the B meson rest frame, we obtain {Delta}{Beta} = (1.80 {+-} 0.13{sub stat.} {+-} 0.15{sub sys.} {+-} 0.02{sub theo.}) x 10{sup -3} from a maximum likelihood fit to the two-dimensional M{sub X} - q{sup 2} distribution. Here, M{sub X} refers to the invariant mass of the final state hadron X and q{sup 2} is the invariant mass squared of the charged lepton and neutrino. From this measurement we extract |V{sub ub}| = (4.31 {+-} 0.25{sub exp.} {+-} 0.16{sub theo.}) x 10{sup -3} as the arithmetic average of four results obtained from four different QCD predictions of the partial rate. We separately determine partial branching fractions for {bar B}{sup 0} and B{sup -} decays and derive a limit on the isospin breaking in {bar B} {yields} X{sub u}{ell}{bar {nu}} decays.

Lees, J.P.

2012-07-13T23:59:59.000Z

312

THE CORRELATION COEFFICIENTS A generalized method of defining and interpreting correlation coefficients is given. Seven  

E-Print Network [OSTI]

on the ranks of the data. A quick calculation of the rank based correlation coefficients using a 0-1 "graph effect so that they will tend to be small and the net effect is that the covariance will be large. One and the covariance will fluctuate around zero. When there is negative correlation the "distance" from positive

Gideon, Rudy A.

313

2359.ps  

E-Print Network [OSTI]

Jul 31, 2009 ... learning the zero-pattern of the inverse-covariance matrix. .... 2On the other hand, COVSEL is implemented in C with Matlab interface, ..... nonzeros in the inverse covariance matrix (or the links in the graph) according to their.

314

Optimal Pair Matching With Two Control Groups  

E-Print Network [OSTI]

Professor, Center for Statistical Sciences, Brown University, Providence, RI 02912 (E-mail: bolu@stat.brown covariate (Campbell 1969; Rosenbaum 1987, 2002a, sec. 8; Meyer 1995; Shadish, Cook, and Campbell 2002). Campbell argued that one should select two control groups to systematically vary an unobserved covariate

Rosenbaum, Paul R.

315

Input Design for Nonlinear Stochastic Dynamic Systems -A Particle Filter  

E-Print Network [OSTI]

Input Design for Nonlinear Stochastic Dynamic Systems - A Particle Filter Approach R. Bhushan in nonlinear stochastic dynamic systems. The approach relies on minimizing a function of the covariance]). There has also been work done on obtaining finite sam- ple covariance estimates (Weyer et al. [1999], Weyer

Schön, Thomas

316

Generalized Linear Modeling (GLM) Approach to Stochastic Weather Generators RICHARD W. KATZ Institute for Study of Society and Environment, NCAR, rwk@ucar.edu EVA M. FURRER Institute for Mathematics Applied to Geosciences, NCAR, eva@ucar.edu  

E-Print Network [OSTI]

) with a transformed conditional mean expressed as a linear function of covariates X1,...,Xp: g E(Y |X1,...,Xp) = 0 +1X. · Markov chain assumption for precipitation occurrence, Jt = 1 if tth day wet, Jt = 0 if tth day dry variables: (Chandler WRR 2002, Env 2005) · Includes geophysical covariates (e.g., NAO) to Stern & Coe-type

Katz, Richard

317

Non-Perturbative Gluon pair production from a Constant Chromo-Electric Field via the Schwinger Mechanism in Arbitrary Gauge  

E-Print Network [OSTI]

We study the non-perturbative production of gluon pairs from a constant SU(3) chromo-electric background field via the Schwinger mechanism. We fix the covariant background gauge with an arbitrary gauge parameter \\alpha. We determine the transverse momentum distribution of the gluons, as well as the total probability of creating pairs per unit space time volume. We find that the result is independent of the covariant gauge parameter \\alpha used to define arbitrary covariant background gauges. We find that our non-perturbative result is both gauge invariant and gauge parameter \\alpha independent.

Fred Cooper; Gouranga C. Nayak

2006-02-21T23:59:59.000Z

318

Differential Structure of the Hyperbolic Clifford Algebra  

E-Print Network [OSTI]

This paper presents a thoughful review of: (a) the Clifford algebra Cl(H_{V}) of multivecfors which is naturally associated with a hyperbolic space H_{V}; (b) the study of the properties of the duality product of multivectors and multiforms; (c) the theory of k multivector and l multiform variables multivector extensors over V and (d) the use of the above mentioned structures to present a theory of the parallelism structure on an arbitrary smooth manifold introducing the concepts of covariant derivarives, deformed covariant derivatives and relative covariant derivatives of multivector, multiform fields and extensors fields.

Eduardo A. Notte-Cuello; Waldyr A. Rodrigues Jr

2014-03-13T23:59:59.000Z

319

Dimensional curvature identities on pseudo-Riemannian geometry  

E-Print Network [OSTI]

The curvature tensor of a pseudo-Riemannian metric, and its covariant derivatives, satisfy certain identities that hold on any manifold of dimension less or equal than $n$. In this paper, we re-elaborate recent results by Gilkey-Park-Sekigawa regarding $p$-covariant dimensional curvature identities, for $p=0,2$. To this end, we use the classical theory of natural operations, that allows us to simplify some arguments and to generalize the description of Gilkey-Park-Sekigawa. Thus, our main result describes the first space of $p$-covariant dimensional curvature identities, for any even $p$.

Alberto Navarro; Jose Navarro

2014-07-21T23:59:59.000Z

320

Mass fluctuation kinetics : analysis and computation of equilibria and local dynamics  

E-Print Network [OSTI]

The mass fluctuation kinetics (MFK) model is a set of coupled first-order differential equations describing the temporal evolution of means, variances and covariances of species concentrations in systems of chemical ...

Azunre, Paul

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

Presented at the Workshop on Cartan Connections, Geometry of Homogeneous Spaces, and Dynamics, ESI, Vienna, July 2011 Two-jets of conformal fields along their zero sets  

E-Print Network [OSTI]

Presented at the Workshop on Cartan Connections, Geometry of Homogeneous Spaces, and Dynamics, ESI IR, 2 v = A + Id, or, in coordinates, vj,k + vk,j = gjk . (1) The covariant derivative v is treated

Derdzinski, Andrzej

322

Ecosystem fluxes of hydrogen: a comparison of flux-gradient methods  

E-Print Network [OSTI]

Our understanding of biosphere–atmosphere exchange has been considerably enhanced by eddy covariance measurements. However, there remain many trace gases, such as molecular hydrogen (H[subscript 2]), that lack suitable ...

Meredith, Laura Kelsey

323

E-Print Network 3.0 - adhatoda vascia nees Sample Search Results  

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

Environmental Sciences and Ecology 34 http:media.allrefer.coms4lp0001164-greenhouse-effect.gif :550-900m. Summary: Covariance. . 12;Fluxnet http:www.fluxnet.ornl.gov...

324

E-Print Network 3.0 - adhatoda vasica nees Sample Search Results  

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

Environmental Sciences and Ecology 35 http:media.allrefer.coms4lp0001164-greenhouse-effect.gif :550-900m. Summary: Covariance. . 12;Fluxnet http:www.fluxnet.ornl.gov...

325

Geometry of domains with the uniform squeezing properties  

E-Print Network [OSTI]

For gB and gKE, any order of covariant derivative of the curvature tensor of the metric is .... coordinates (z1, ··· ,zN ) on a coordinate chart U, let eKM = dz1?· · ·?

2010-04-12T23:59:59.000Z

326

Mathematisches Institut der Universitat Bayreuth Der Geschaftsfuhrende Vorstand  

E-Print Network [OSTI]

, Abteilung Finanzmathematik Fraunhofer ITWM, Kaiserslautern Gast am Lehrstuhl f¨ur Stochastik bei Prof. Dr parameters, i.e.; innovation and error covariances, as well as transition and observations matrices, which

Schittkowski, Klaus

327

Test particle motion in modified gravity theories  

E-Print Network [OSTI]

We derive the equations of motion of an electrically neutral test particle for modified gravity theories in which the covariant divergence of the ordinary matter energy-momentum tensor dose not vanish (i.e. $\

Mahmood Roshan

2013-02-05T23:59:59.000Z

328

Large Monitoring Systems: Data Analysis, Design and Deployment  

E-Print Network [OSTI]

4):269– A. Das and D. Kempe. Algorithms for subset selectionreturns property [Das and Kempe, 2008; Krause et al. , 2007]the covariance by Das and Kempe [2008]. Note that we assume

Rajagopal, Ram

2009-01-01T23:59:59.000Z

329

Partonic coalescence in relativistic heavy ion collisions  

E-Print Network [OSTI]

Using a covariant coalescence model, we study hadron production in relativistic heavy ion collisions from both soft partons in the quark-gluon plasma and hard partons in minijets. Including transverse flow of soft partons and independent...

Greco, V.; Ko, Che Ming; Levai, P.

2003-01-01T23:59:59.000Z

330

Feeding and energetics of the great scallop, Pecten maximus, through a DEB1 Romain Lavauda,  

E-Print Network [OSTI]

of the Dynamic Energy Budget (DEB) theory. The covariation method was implemented to estimate the parameters trophic sources, from microalgae cells to detritus. They are also able to sort and select food particles

Paris-Sud XI, Université de

331

Method and system to estimate variables in an integrated gasification combined cycle (IGCC) plant  

DOE Patents [OSTI]

System and method to estimate variables in an integrated gasification combined cycle (IGCC) plant are provided. The system includes a sensor suite to measure respective plant input and output variables. An extended Kalman filter (EKF) receives sensed plant input variables and includes a dynamic model to generate a plurality of plant state estimates and a covariance matrix for the state estimates. A preemptive-constraining processor is configured to preemptively constrain the state estimates and covariance matrix to be free of constraint violations. A measurement-correction processor may be configured to correct constrained state estimates and a constrained covariance matrix based on processing of sensed plant output variables. The measurement-correction processor is coupled to update the dynamic model with corrected state estimates and a corrected covariance matrix. The updated dynamic model may be configured to estimate values for at least one plant variable not originally sensed by the sensor suite.

Kumar, Aditya; Shi, Ruijie; Dokucu, Mustafa

2013-09-17T23:59:59.000Z

332

ALTERNATING DIRECTION METHODS FOR SPARSE ...  

E-Print Network [OSTI]

Since zero entries in the inverse covariance matrix correspond to the conditional ..... All the codes of the ADM approach were written by Matlab 7.1. .... graphs via chordal embedding, Optimization Methods and Software 23 (4) (2008), pp. 501-.

2009-09-04T23:59:59.000Z

333

Approaches to Speech Recognition based on Speaker Recognition Daniel Povey  

E-Print Network [OSTI]

the techniques used, without the full technical details. We initially used an approach based on Maximum a Posteri methods such as nuisance attribute projection (SCB05), within-class covariance nor- malization (HKS06

Povey, Dan

334

Ensuring Positiveness of the Scaled Di?erence Chi-square Test Statistic  

E-Print Network [OSTI]

M 1 , and gives the ML statistic T 1 . Compute the SB robustkurtosis. Computational Statistics, 17, 117-122. Browne, M.for chi-square statistics in covariance structure analysis.

Albert Satorra; Peter M. Bentler

2011-01-01T23:59:59.000Z

335

Ensuring Positiveness of the Scaled Di?erence Chi-square Test Statistic  

E-Print Network [OSTI]

M 1 , and gives the ML statistic T 1 . Compute the SB robustkurtosis. Computational Statistics, 17, 117-122. Browne, M.for chi-square statistics in covariance structure analysis.

Satorra, Albert; Bentler, P M

2008-01-01T23:59:59.000Z

336

E-Mail karger@karger.com Brain Behav Evol 2013;82:1930  

E-Print Network [OSTI]

ex- plains covariation of body form, nervous system organiza- tion, and level of behavioral. Safra Campus, Givat Ram, Hebrew University Jerusalem 9190 (Israel) E-Mail benny.hochner @ mail.huji.ac.il

Hochner, Binyamin

337

RICCI Sophie Global Change and Climate Modeling Team  

E-Print Network [OSTI]

RICCI Sophie Global Change and Climate Modeling Team CERFACS - Toulouse, FRANCE Technical Report TR covariance matrix#17;. This hypothesis stems from the T S water mass properties conservation over long term

338

Robust time-varying multivariate coherence estimation: Application to electroencephalogram recordings during general anesthesia  

E-Print Network [OSTI]

Coherence analysis characterizes frequency-dependent covariance between signals, and is useful for multivariate oscillatory data often encountered in neuroscience. The global coherence provides a summary of coherent behavior ...

Brown, Emery N.

339

Bayesian Estimation of Material Properties in Case of Correlated and Insufficient Data  

E-Print Network [OSTI]

applied in various versions to nancial applications [9], molecular biology and genetics [10], hyperspectral imaging and optics [11]. Coming to Bayesian inference, hierarchical models considering the multivariate covariance matrix in terms of its...

Giugno, Matteo

2013-04-09T23:59:59.000Z

340

On Ergodic Secrecy Capacity for Gaussian MISO Wiretap Channels  

E-Print Network [OSTI]

A Gaussian multiple-input single-output (MISO) wiretap channel model is considered, where there exists a transmitter equipped with multiple antennas, a legitimate receiver and an eavesdropper each equipped with a single antenna. We study the problem of finding the optimal input covariance that achieves ergodic secrecy capacity subject to a power constraint where only statistical information about the eavesdropper channel is available at the transmitter. This is a non-convex optimization problem that is in general difficult to solve. Existing results address the case in which the eavesdropper or/and legitimate channels have independent and identically distributed Gaussian entries with zero-mean and unit-variance, i.e., the channels have trivial covariances. This paper addresses the general case where eavesdropper and legitimate channels have nontrivial covariances. A set of equations describing the optimal input covariance matrix are proposed along with an algorithm to obtain the solution. Based on this framew...

Li, Jiangyuan

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

The Quantitative Genetics of Mate Choice Evolution: Theory and Empiricism  

E-Print Network [OSTI]

emerged. From a theoretical standpoint, the nature of the genetic covariance built up by the process of mate choice has received considerable attention, though the models still make biologically unrealistic assumptions. Empirically, the difficulty...

Ratterman, Nicholas 1981-

2012-11-15T23:59:59.000Z

342

Boundary-Layer Meteorol (2010) 137:307326 DOI 10.1007/s10546-010-9529-5  

E-Print Network [OSTI]

). A considerable amount of isotope research has focused on the condensed phase. However, the analysis of water-covariance and infrared gas analyser techniques over a soybean canopy in 2008. The results indicate that w and F agreed

Minnesota, University of

343

Boundary-Layer Meteorol DOI 10.1007/s10546-010-9529-5  

E-Print Network [OSTI]

). A considerable amount of isotope research has focused on the condensed phase. However, the analysis of water compared using EC-TDL and traditional eddy-covariance and infrared gas analyser techniques over a soybean

Minnesota, University of

344

Quantifying the ecosystem-scale emission and deposition fluxes of biogenic volatile organic compounds (BVOC) and their oxidation products above plant canopies  

E-Print Network [OSTI]

covariance plots of vertical wind speed and m/z 127.073 (C 7correlation of vertical wind speed (w) and volume mixingcorrections between vertical wind speed and volume mixing

Park, Jeong-Hoo

2012-01-01T23:59:59.000Z

345

Off-shell two loop QCD vertices  

E-Print Network [OSTI]

We calculate the triple gluon, ghost-gluon and quark-gluon vertex functions at two loops in the MSbar scheme in the chiral limit for an arbitrary linear covariant gauge when the external legs are all off-shell.

J. A. Gracey

2014-06-03T23:59:59.000Z

346

Power functions and envelopes for unit root tests  

E-Print Network [OSTI]

This paper studies power functions and envelopes for covariate augmented unit root tests. The power functions are calculated by integrating the characteristic function, allowing accurate evaluation of the power envelope ...

Juhl, Ted P.; Xiao, Z. J.

2003-04-01T23:59:59.000Z

347

The Annals of Statistics 2005, Vol. 33, No. 2, 501521  

E-Print Network [OSTI]

to condense high- dimensional covariates to achieve dimension reduction. Then the estimator of the treatment efficiency bound. 1. Introduction. In many public health problems, an important goal is to study the effect

Zeng, Donglin

348

Ocean color observations and modeling for an optically complex site: Santa Barbara  

E-Print Network [OSTI]

goods and services including biogeo- chemical cycling, waste recycling, fisheries, and recreation. Our by colored dissolved organic matter and suspended sediments which only weakly covary with chlorophyll phytoplankton and colored dissolved organic matter contribute approximately equally to the total nonwater

Maritorena, Stéphane

349

Testing complex correlational hypotheses using structural equation modeling  

E-Print Network [OSTI]

It is often of interest to estimate partial or semipartial correlation coefficients as indexes of the linear association between 2 variables after partialing one or both for the influence of covariates. Squaring these ...

Preacher, K. J.

2006-01-01T23:59:59.000Z

350

Improving the Performance of MIQP Solvers for Quadratic Programs ...  

E-Print Network [OSTI]

xjzheng@tongji.edu.cn. Xiaoling Sun ...... Next, we consider 5 instances of (MV) from OR-Library, where the mean vector µ and the covariance matrix Q were ...

2013-09-07T23:59:59.000Z

351

Effects of physiological status, supplementation and monensin on forage intake, digestibility, and digesta turnover in cattle grazing range  

E-Print Network [OSTI]

was not initiated until the completion of trial 1. Data from this initial trial served as the covariate for an analysis of covariance for trials 1, 2 and 3. Previous grazing pressure and sheep were used to maintain similar stocking rates among the pastures...EFFECTS OF PHYSIOLOGICAL STATUS, SUPPLEMENTATION AND MONENSIN ON FORAGE INTAKE, DIGESTIBILITY, AND DIGESTA TURNOVER IN CATTLE GRAZING RANGE A Thesis by RICHARD VAUGHN MACHEN Submitted to the Graduate College of Texas A&M University...

Machen, Richard Vaughn

1984-01-01T23:59:59.000Z

352

Transient Analysis of Large-scale Stochastic Service Systems  

E-Print Network [OSTI]

4 Multi-server queue with abandonment and retrials, Mandelbaum et al. (2002) : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 30 5 Comparison of mean values, E X(t) : : : : : : : : : : : : : : : : : : 37 6 Comparison... of covariance matrix entries, Cov X(t); X(t) : : : : : : 39 7 Comparison of mean values, E X(t) : : : : : : : : : : : : : : : : : : 41 8 Comparison of covariance matrices, Cov X(t); X(t) : : : : : : : : : 42 9 Fluid limits in the nearly...

Ko, Young Myoung

2012-07-16T23:59:59.000Z

353

Precise determination of the spin structure function $\\mathbf{g_1}$ of the proton, deuteron and neutron  

E-Print Network [OSTI]

Precise measurements of the spin structure functions of the proton $g_1^p(x,Q^2)$ and deuteron $g_1^d(x,Q^2)$ are presented over the kinematic range $0.0041 \\leq x \\leq 0.9$ and $0.18 $ GeV$^2$ $\\leq Q^2 \\leq 20$ GeV$^2$. The data were collected at the HERMES experiment at DESY, in deep-inelastic scattering of 27.6 GeV longitudinally polarized positrons off longitudinally polarized hydrogen and deuterium gas targets internal to the HERA storage ring. The neutron spin structure function $g_1^n$ is extracted by combining proton and deuteron data. The integrals of $g_1^{p,d}$ at $Q^2=5$ GeV$^2$ are evaluated over the measured $x$ range. Neglecting any possible contribution to the $g_1^d$ integral from the region $x \\leq 0.021$, a value of $0.330 \\pm 0.011\\mathrm{(theo.)}\\pm0.025\\mathrm{(exp.)}\\pm 0.028$(evol.) is obtained for the flavor-singlet axial charge $a_0$ in a leading-twist NNLO analysis.

Airapetian, A; Akopov, Z; Andrus, A; Aschenauer, E C; Augustyniak, W; Avakian, R; Avetisian, A; Avetissian, E; Belostotskii, S; Bianchi, N; Blok, H P; Böttcher, H; Borisov, A; Borysenko, A; Brüll, A; Bryzgalov, V; Capiluppi, M; Capitani, G P; Ciullo, G; Contalbrigo, M; Dalpiaz, P F; Deconinck, W; De Leo, R; Demey, M; De Nardo, L; De Sanctis, E; Devitsin, E; Diefenthaler, M; Di Nezza, P; Dreschler, J; Düren, M; Ehrenfried, M; Elalaoui-Moulay, A; Elbakian, G; Ellinghaus, F; Elschenbroich, U; Fabbri, R; Fantoni, A; Felawka, L; Frullani, S; Funel, A; Gabbert, D; Gärber, Y; Gapienko, G; Gapienko, V; Garibaldi, F; Garrow, K; Gavrilov, G; Karibian, V; Giordano, F; Grebenyuk, O; Gregor, I M; Guler, H; Gute, A; Hadjidakis, C; Hartig, M; Hasch, D; Hasegawa, T; Hesselink, W H A; Hillenbrand, A; Hoek, M; Holler, Y; Hommez, B; Hristova, I; Iarygin, G; Ivanilov, A; Izotov, A; Jackson, H E; Jgoun, A; Kaiser, R; Keri, T; Kinney, E; Kiselev, A; Kobayashi, T; Kopytin, M; Korotkov, V; Kozlov, V; Krauss, B; Kravchenko, P; Krivokhizhin, V G; Lagamba, L; Lapikas, L; Lenisa, P; Liebing, P; Linden-Levy, L A; Lorenzon, W; Lü, J; Lu, S; Ma, B Q; Maiheu, B; Makins, N C R; Mao, Y; Marianski, B; Marukyan, H; Masoli, F; Mexner, V; Meyners, N; Michler, T; Miklukho, O; Miller, C A; Miyachi, Y; Muccifora, V; Murray, M; Nagaitsev, A; Nappi, E; Naryshkin, Yu; Negodaev, M; Nowak, Wolf-Dieter; Ohsuga, H; Osborne, A; Perez-Benito, R; Pickert, N; Raithel, M; Reggiani, D; Reimer, P E; Reischl, A; Reolon, A R; Riedl, C; Rith, K; Rosner, G; Rostomyan, A; Rubacek, L; Rubin, J; Ryckbosch, D; Salomatin, Y; Sanjiev, I; Savin, I; Schäfer, A; Schnell, G; Schüler, K P; Seele, J; Seitz, B; Shearer, C; Shibata, T A; Shutov, V; Sinram, K; Stancari, M; Statera, M; Steffens, E; Steijger, J J M; Stenzel, H; Stewart, J; Stinzing, F; Stösslein, U; Streit, J; Tait, P; Tanaka, H; Taroian, S P; Tchuiko, B; Terkulov, A R; Trzcinski, A; Tytgat, M; Vandenbroucke, A; Van der Nat, P B; van der Steenhoven, G; Van Haarlem, Y; Veretennikov, D; Vikhrov, V; Vogel, C; Wang, S; Weiskopf, C; Ye, Y; Ye, Z; Yen, S; Zihlmann, B; Zupranski, P

2006-01-01T23:59:59.000Z

354

Are CPL models compatible with the late inhomogeneous Universe?  

E-Print Network [OSTI]

We study the late-time evolution of the Universe where dark energy (DE) is presented by a barotropic fluid on top of cold dark matter (CDM). We also take into account the radiation content of the Universe. Here by the late stage of the evolution we refer to the epoch where CDM is already clustered into inhomogeneously distributed discrete structures (galaxies, groups and clusters of galaxies). Under this condition the mechanical approach is an adequate tool to study the Universe deep inside the cell of uniformity. More precisely, we study scalar perturbations of the FLRW metric due to inhomogeneities of CDM as well as fluctuations of radiation and DE. For an arbitrary equation of state for DE we obtain a system of equations for the scalar perturbations within the mechanical approach. We apply this approach to different linear parametrizations of the DE equation of state, e.g., the Chevallier-Polarski-Linder (CPL) perfect fluid model. We reach the conclusion that all these models are incompatible with the theo...

Akarsu, Ozgur; Brilenkov, Maxim; Brilenkov, Ruslan; Eingorn, Maxim; Zhuk, Alexander

2015-01-01T23:59:59.000Z

355

Choice of Gauge in Quantum Gravity  

E-Print Network [OSTI]

This paper is an extended version of the talk given at 19th Texas Symposium of Relativistic Astrophysics and Cosmology, Paris, 1998. It reviews of some recent work; mathematical details are skipped. It is well-known that a choice of gauge in generally covariant models has a twofold pupose: not only to render the dynamics unique, but also to define the spacetime points. A geometric way of choosing gauge that is not based on coordinate conditions---the so-called covariant gauge fixing---is described. After a covariant gauge fixing, the dynamics is unique and the background manifold points are well-defined, but the description remains invariant with respect to all diffeomorphisms of the background manifold. Transformations between different covariant gauge fixings form the well-known Bergmann-Komar group. Each covariant gauge fixing determines a so-called Kucha\\v{r} decomposition. The construction of the quantum theory is based on the Kucha\\v{r} form of the action and the Dirac method of operator constraints. It is demonstrated that the Bergmann-Komar group is too large to be implementable by unitary maps in the quantum domain.

Petr Hajicek

1999-03-24T23:59:59.000Z

356

Generalized helicity and Beltrami fields  

SciTech Connect (OSTI)

We propose covariant and non-abelian generalizations of the magnetic helicity and Beltrami equation. The gauge invariance, variational principle, conserved current, energy–momentum tensor and choice of boundary conditions elucidate the subject. In particular, we prove that any extremal of the Yang–Mills action functional 1/4 ?{sub ?}trF{sub ??}F{sup ??}d{sup 4}x subject to the local constraint ?{sup ????}trF{sub ??}F{sub ??}=0 satisfies the covariant non-abelian Beltrami equation. -- Highlights: •We introduce the covariant non-abelian helicity and Beltrami equation. •The Yang–Mills action and instanton term constraint lead to the Beltrami equation. •Solutions of the Beltrami equation conserve helicity.

Buniy, Roman V., E-mail: roman.buniy@gmail.com [Schmid College of Science, Chapman University, Orange, CA 92866 (United States); Isaac Newton Institute, University of Cambridge, Cambridge, CB3 0EH (United Kingdom); Kephart, Thomas W., E-mail: tom.kephart@gmail.com [Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235 (United States); Isaac Newton Institute, University of Cambridge, Cambridge, CB3 0EH (United Kingdom)

2014-05-15T23:59:59.000Z

357

Regularizing role of teleparallelism  

E-Print Network [OSTI]

The properties of the gravitational energy-momentum 3-form and of the superpotential 2-form are discussed in the covariant teleparallel framework, where the Weitzenb\\"ock connection represents inertial effects related to the choice of the frame. Due to its odd asymptotic behavior, the contribution of the inertial effects often yields unphysical (divergent or trivial) results for the total energy of the system. However, in the covariant teleparallel approach, the energy is always finite and nontrivial. The teleparallel connection plays a role of a regularizing tool which subtracts the inertial effects without distorting the true gravitational contribution. As a crucial test of the covariant formalism, we reanalyze the computation of the total energy of the Schwarzschild and the Kerr solutions.

Tiago Gribl Lucas; Yuri N. Obukhov; J. G. Pereira

2009-09-13T23:59:59.000Z

358

Quantum information, Bell inequalities and the no-signalling principle  

E-Print Network [OSTI]

are not restricted to be in a finite set, but are constrained only by the angle ?. We motivate and explore the hypoth- esis that for a continuous range of ? > 0, the maximum correlation (anticorrelation) is obtained by assigning to one qubit the colouring with one... is the depolarizing map. It transforms a state ? ? D(Cd) as follows: E(?) = p I d + (1? p)?, (1.6) where p is the probability that ? is replaced by the completely mixed state Id . The depolarizing map is covariant. A covariant map Ecov is such that Ecov(U?U †) = UEcov...

Pitalúa-García, Damián

2014-02-04T23:59:59.000Z

359

Undeformed (additive) energy conservation law in Doubly Special Relativity  

E-Print Network [OSTI]

All the Doubly Special Relativity (DSR) models studied in literature so far involve a deformation of the energy conservation rule that forces us to release the hypothesis of the additivity of the energy for composite systems. In view of the importance of the issue for a consistent formulation of a DSR statistical mechanics and a DSR thermodynamics, we show that DSR models preserving the usual (i.e. additive) energy conservation rule can be found. These models allow the construction of a DSR-covariant extensive energy. The implications of the analysis for the dynamics of DSR-covariant multiparticle systems are also briefly discussed.

Gianluca Mandanici

2008-11-11T23:59:59.000Z

360

Gravity with a dynamical preferred frame  

E-Print Network [OSTI]

We study a generally covariant model in which local Lorentz invariance is broken "spontaneously" by a dynamical unit timelike vector field $u^a$---the "aether". Such a model makes it possible to study the gravitational and cosmological consequences of preferred frame effects, such as ``variable speed of light" or high frequency dispersion, while preserving a generally covariant metric theory of gravity. In this paper we restrict attention to an action for an effective theory of the aether which involves only the antisymmetrized derivative $\

Ted Jacobson; David Mattingly

2001-06-02T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

Neural adaptation to non-symbolic number and visual shape: An electrophysiological study  

E-Print Network [OSTI]

that there is an ecologically reasonable explana- hy there might not be a hardwired representation of agnitudes per se (e.g. in the IPS. See also Shuman and (2004) for a non-specific account of the IPS). Among umstances, the numerical magnitude of objects usu- te almost... properties by our perceptual e perception of numbers may only reach an abstract endent of co-varying perceptual variables, either when n is explicit or when abstract (i.e. free from natu- al co-variates) symbols are used. In both these latter required...

Soltész, Fruzsina; Sz?cs, Dénes

2014-09-23T23:59:59.000Z

362

Apparent horizon in fluid-gravity duality  

SciTech Connect (OSTI)

This article develops a computational framework for determining the location of boundary-covariant apparent horizons in the geometry of conformal fluid-gravity duality in arbitrary dimensions. In particular, it is shown up to second order and conjectured to hold to all orders in the gradient expansion that there is a unique apparent horizon which is covariantly expressible in terms of fluid velocity, temperature, and boundary metric. This leads to the first explicit example of an entropy current defined by an apparent horizon and opens the possibility that in the near-equilibrium regime there is preferred foliation of apparent horizons for black holes in asymptotically anti-de Sitter spacetimes.

Booth, Ivan; Heller, Michal P.; Plewa, Grzegorz; Spalinski, Michal [Department of Mathematics and Statistics, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, A1C 5S7 (Canada); Instituut voor Theoretische Fysica, Universiteit van Amsterdam, Science Park 904, 1090 GL Amsterdam (Netherlands); Soltan Institute for Nuclear Studies, Hoza 69, 00-681 Warsaw (Poland); Soltan Institute for Nuclear Studies, Hoza 69, 00-681 Warsaw (Poland) and Physics Department, University of Bialystok, 15-424 Bialystok (Poland)

2011-05-15T23:59:59.000Z

363

Linear Diagnostics to Assess the Performance of an Ensemble Forecast System  

E-Print Network [OSTI]

. The mathematical model we adopt to predict the evolution of uncertainty in a local state estimate (analysis or forecast), xe, is based on the assumption that the error in the state estimate, ? = xe ? xt, (2.1) *Portions of this chapter have been reprinted from... variable. In Equation (2.1) xt is the model representation of the, in practice unknown, true state of the atmosphere. The covariance between the different components of ? is described by the error covariance matrix P`. We employ a K-member ensemble...

Satterfield, Elizabeth A.

2011-10-21T23:59:59.000Z

364

Valence quark and meson cloud contributions to the $?^\\ast N \\to N^\\ast(1520)$ form factors  

E-Print Network [OSTI]

The covariant spectator quark model is applied to the $\\gamma^\\ast N \\to N^\\ast(1520)$ reaction. The valence quark contributions to the electromagnetic form factors and helicity transition amplitudes are estimated from the covariant structure of the $N^\\ast(1520)$ wave function calibrated by the experimental data for large squared momentum transfer $Q^2$. The difference between the model results and the experimental data is then used to parameterize the low $Q^2$ behavior, where meson cloud effects are assumed to dominate. This parametrization can be very useful for future studies of the reaction, as well as for the extension of the transition form factors to the timelike region.

G. Ramalho; M. T. Peña

2014-05-20T23:59:59.000Z

365

Relativistic two-body system in (1+1)-dimensional QED. 1. On the circle S{sup 1}  

SciTech Connect (OSTI)

From the coupled Maxwell-Dirac equations for two fermion fields {Psi}{sub 1}, {Psi}{sub 2} the authors derive a covariant two-body equation for the composite field {Phi}(x{sub 1}, x{sub 2}) in configuration space which includes radiative self-energy effects. Both Coulomb gauge and covariant gauge have been used and their equivalence is proved. For the space S{sup 1} the authors solve the two-body equation with mutual interactions exactly and obtain the mass spectrum in the case of massless fermions. 7 refs., 5 figs.

Barut, A.O. [Univ. of Colorado, Boulder, CO (United States)] [Univ. of Colorado, Boulder, CO (United States); [International Centre for Theoretical Physics, Trieste (Italy); Saradzhev, F.M. [Academy of Sciences of Azerbaijan, Baku (Azerbaijan)] [Academy of Sciences of Azerbaijan, Baku (Azerbaijan); [International Centre for Theoretical Physics, Trieste (Italy)

1994-10-01T23:59:59.000Z

366

Department of Economics and Business Aarhus University  

E-Print Network [OSTI]

Email: oekonomi@au.dk Tel: +45 8716 5515 Asymptotic Theory for the QMLE in GARCH-X Models;Asymptotic Theory for the QMLE in GARCH-X Models with Stationary and Non-Stationary Covariates Heejoon Hany quasi-maximum-likelihood estimators (QMLE's) of the GARCH model augmented by including an additional

367

EQUATION OF FORCE OF GRAVITY DERIVED FROM THE AREA OF PLANCK INVARIANCE UNUSED UNIVERSAL GRAVITATIONAL CONSTANT OF  

E-Print Network [OSTI]

with entropy the energy sector flow (2). Erik Verlinde published on January 6, 2010, his work "On the Origin, to make it compatible with the law of conservation of energy and principles of general covariance the energy- momentum tensor, but fails to integrate into said Energy-Momentum Tensor the constant Universal

368

Portfolio Selection with Robust Estimation  

E-Print Network [OSTI]

Department of Management Science and Operations, London Business School ... (1952). To implement these portfolios in practice, one has to estimate the mean and the covariance matrix of ... have good properties not only for the assumed distribution but also for any distribution in a ...... KNITRO user's manual. version 4.0.

2007-08-10T23:59:59.000Z

369

Type Master Thesis Title TV based image processing for manifold-valued data  

E-Print Network [OSTI]

Type Master Thesis Title TV based image processing for manifold-valued data Advisor PROF. PHILIPP of a numerical array of real values (as e.g. in grey-value images) but rather of arrays (matrices) whose elements images, covariance matrices arising in radar observatory data, etc... The challenge is to extend

Grohs, Philipp

370

Quasi-local energy-momentum and energy flux at null infinity  

E-Print Network [OSTI]

The null infinity limit of the gravitational energy-momentum and energy flux determined by the covariant Hamiltonian quasi-local expressions is evaluated using the NP spin coefficients. The reference contribution is considered by three different embedding approaches. All of them give the expected Bondi energy and energy flux.

Xiaoning Wu; Chiang-Mei Chen; James M. Nester

2005-06-02T23:59:59.000Z

371

Atmos. Chem. Phys., 7, 28392854, 2007 www.atmos-chem-phys.net/7/2839/2007/  

E-Print Network [OSTI]

), their impact is relevant at a global scale (Bates et al., 2006; Heintzenberger et al., 2003). Mineral dust-segregated fluxes of mineral dust from a desert area of northern China by eddy covariance G. Fratini1, P. Ciccioli2, A. Febo3, A. Forgione4, and R. Valentini1 1Department of Forest Sciences and Resources (Di

Paris-Sud XI, Université de

372

A Dynamic Programming Algorithm for RNA Structure Prediction Including Pseudoknots  

E-Print Network [OSTI]

minimum energy structure for a single RNA sequence, using standard RNA folding thermodynamic parameters algorithm to be able to fold optimal (minimum energy) pseudoknotted RNAs with the accepted RNA thermodynamic, particularly pairs which covary to maintain Watson-Crick complementarity, are indicative of conserved base

Eddy, Sean

373

vol. 176, no. 1 the american naturalist july 2010 Teasing Apart the Many Effects of Lighting Environment  

E-Print Network [OSTI]

vol. 176, no. 1 the american naturalist july 2010 Teasing Apart the Many Effects of Lighting covary with lighting in many taxa. Determining the mechanisms underlying these patterns is dif- ficult because lighting environments can have multiple effects on signaling that occur at multiple timescales

Fuller, Rebecca

374

Ecological Applications, 14(4) Supplement, 2004, pp. S22S32 2004 by the Ecological Society of America  

E-Print Network [OSTI]

, University of California, Irvine, California 92697-3100 USA Abstract. We used the eddy covariance technique to the dry season, cooler temperatures, greater cloudiness, and reduced incoming solar and net radiation in evaporative fraction coincided with an increase in ecosystem CO2 assimilation capacity, which we attribute

Kimball, Sarah

375

Gravitoelectromagnetism and Dark Energy in Superconductors  

E-Print Network [OSTI]

A gravitomagnetic analogue of the London moment in superconductors can explain the anomalous Cooper pair mass excess reported by Janet Tate. Ultimately the gravitomagnetic London moment is attributed to the breaking of the principle of general covariance in superconductors. This naturally implies non-conservation of classical energy-momentum. Possible relation with the manifestation of dark energy in superconductors is questioned.

Clovis Jacinto de Matos

2006-07-03T23:59:59.000Z

376

1 Ozone pollution forecasting 3 Herve Cardot, Christophe Crambes and Pascal Sarda.  

E-Print Network [OSTI]

Contents 1 Ozone pollution forecasting 3 Herv´e Cardot, Christophe Crambes and Pascal Sarda. 1;1 Ozone pollution forecasting using conditional mean and conditional quantiles with functional covariates Herv´e Cardot, Christophe Crambes and Pascal Sarda. 1.1 Introduction Prediction of Ozone pollution

Crambes, Christophe

377

Statistical Deterministic  

E-Print Network [OSTI]

of OL weights / H 1=2 ). H !1: Posterior of net output converges (with p. 1) to zero-mean Gaussian D) = P (D j #18;)P (#18;) P (D) (1) to calculate P (t j x; D) by marginalizing over #18;. Karlsruhe | November 10, 1998 5 #12; Regression with Gaussian Processes Prior P (y(x)) zero-mean GP with covariance

Seeger, Matthias

378

statistical planning Journal of Statistical Planning and and inference  

E-Print Network [OSTI]

-dependent covariates D.Y. Lin a'*, Zhiliang Ying b "Department . Ying/Journal q/' Statistical Plannin~l and lt~[brence 44 (1995) 47 63 where To refers to the condition attention (e.g., Ritov, 1990; Tsiatis, 1990; Wei et al., 1990; Lai and Ying, 1991; Ying, 1993). To provide

Lin, Danyu

379

Analyzing nonstationary spatial data using piecewise Gaussian Hyoung-Moon Kim, Bani K. Mallick and C. C. Holmes1  

E-Print Network [OSTI]

Analyzing nonstationary spatial data using piecewise Gaussian processes Hyoung-Moon Kim, Bani K propose a generic method for the analysis of spatial data with sharp changes in the underlying covariance Datta-Gupta for providing the data and Michael Sherman, Sang Heon Lee, Naijun Sha for helpful comments

Holmes, Chris

380

Motion Processing and From-from-Apparent-Motion in Infancy  

E-Print Network [OSTI]

/VPC) and discrimination paradigms. Infants in both paradigms extracted shape from apparent motion given luminance cues alone, and color and luminance cues co-varying; but failed to extract shape given color cues alone (Studies 1-2). Given only color cues, infants required...

Hirshkowitz, Amy

2014-08-05T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

Reply to the Comment of X. Ji on "Spin and orbital angular momentum in gauge theories" [PRL 100:232002 (2008)  

E-Print Network [OSTI]

We reply to the Comment of X. Ji [arXiv:0810.4913] on our paper [PRL 100:232002 (2008)], concerning angular momentum algebra, locality, Lorentz covariance, and measurability of our gauge-invariant description of the spin and orbital angular momentum of quarks and gluons.

Xiang-Song Chen; Xiao-Fu Lü; Wei-Min Sun; Fan Wang; T. Goldman

2008-12-23T23:59:59.000Z

382

PROFILING SUBSTANCE ABUSE PROVIDER TRENDS IN  

E-Print Network [OSTI]

PROFILING SUBSTANCE ABUSE PROVIDER TRENDS IN HEALTH CARE DELIVERY SYSTEMS || James F. Burgess, Jr using several covariates. This is illustrated here in the context of sub- stance abuse care. One common process monitor for systems delivering substance abuse care is follow-up outpatient care within a certain

West, Mike

383

LETTER doi:10.1038/nature10854 Uncovering the Neoproterozoic carbon cycle  

E-Print Network [OSTI]

Ccarb and d13 C in organic carbon (d13 Corg) will covary, offset by the fractionation impartedLETTER doi:10.1038/nature10854 Uncovering the Neoproterozoic carbon cycle D. T. Johnston1 , F. A events in Earth history are, in large part, derived from the stable carbon isotope records of carbonate

Schrag, Daniel

384

QUIKSCAT MEASUREMENTS AND ECMWF WIND FORECASTS  

E-Print Network [OSTI]

. (2004) this forecast error was encountered when assimilating satellite measurements of zonal wind speeds between satellite measurements and meteorological forecasts of near-surface ocean winds. This type of covariance enters in assimilation techniques such as Kalman filtering. In all, six residual fields

Malmberg, Anders

385

QUIKSCAT MEASUREMENTS AND ECMWF WIND FORECASTS  

E-Print Network [OSTI]

. (2004) this forecast error was encountered when assimilating satellite measurements of zonal wind speeds between satellite measurements and meteorological forecasts of near­surface ocean winds. This type of covariance enters in assimilation techniques such as Kalman filtering. In all, six residual fields

Malmberg, Anders

386

Fuzzy Markov Random Fields versus Chains for Multispectral Image Segmentation  

E-Print Network [OSTI]

#12;3 Abstract This paper deals with a comparison of recent statistical models based on fuzzy Markov the dependence between bands and we express the general model for the covariance matrix. A fuzzy Markov chain model is developed in an unsupervised way. This method is compared with the fuzzy Markovian field model

387

A unifying mechanical equation with applications to non-holonomic constraints and dissipative phenomena  

E-Print Network [OSTI]

A mechanical covariant equation is introduced which retains all the effectingness of the Lagrange equation while being able to describe in a unified way other phenomena including friction, non-holonomic constraints and energy radiation (Lorentz-Abraham-Dirac force equation). A quantization rule adapted to the dissipative degrees of freedom is proposed which does not pass through the variational formulation.

E. Minguzzi

2014-10-01T23:59:59.000Z

388

INT Program INT13-3 Quantitative Large Amplitude Shape Dynamics: fission and heavy ion fusion  

E-Print Network [OSTI]

INT Program INT13-3 Quantitative Large Amplitude Shape Dynamics: fission and heavy ion fusion Talou, LANL "Fundamental and Applied Nuclear Fission Research at LANL" · 11:00 am: Anatoli Afanasjev, Mississippi State Univ "Fission in covariant DFT: status and open questions" Wednesday, October 2, 2013 Room C

Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group

389

7, 1324313269, 2007 EC fluxes of sea  

E-Print Network [OSTI]

of radiation, and hence the radiation budget near the surface, over the open oceans (Haywood et al., 1999 Discussions Eddy covariance measurements of sea spray particles over the Atlantic Ocean S. Norris1 , I. Brooks the literature. 1 Introduction Sea spray particles are salt water droplets ejected from the ocean. The aerosols15

Paris-Sud XI, Université de

390

dition du congrs international pluridisciplinaire Qualita 2007 Tanger (Maroc)  

E-Print Network [OSTI]

the maintenance cost optimization per unit of time combining statistical process control (SPC) and condition deterioration level whereas a control a classical control chart is used to monitor the stress covariate model, control chart, economic performance 1. Introduction On s'intéresse à la modélisation et à l

Paris-Sud XI, Université de

391

Seasonal isotope and trace-metal profiles of serially-sampled Conus gastropods: proxies for paleoenvironmental change  

E-Print Network [OSTI]

during summers and slower during winters. Tuning the profiles versus time yields ?18O values that co-vary closely with seasonal temperatures to a high degree of coherency (R2 = 0.84). The ?13C profiles show cyclic variation modified...

Gentry, David Keith

2006-08-16T23:59:59.000Z

392

Striatal connectivity changes following gambling wins and near-misses: Associations with gambling severity  

E-Print Network [OSTI]

, and SOGS score as a covariate. 2.3. Imaging procedure Scanningwas performed on a Siemens TimTrio 3 Teslamagnet using a 32 slice axial oblique sequence, with a repetition time of 2 s (TE 30ms, flip angle 7, voxel size 3.1 × 3.1 × 3.0 mm, matrix size 64 × 64...

van Holst, Ruth J.; Chase, Henry W.; Clark, Luke

2014-07-02T23:59:59.000Z

393

J. Fluid Mech., page 1 of 27 c Cambridge University Press 2011 doi:10.1017/S0022112011000322  

E-Print Network [OSTI]

a technique able to produce a random field with the exact two-point two-time covariance of a given reference on our system. Suppose that we are interested in the wake of a cylinder in a fully turbulent flow, as could be realized experimentally by placing a turbulence-generating grid in a wind tunnel, upstream

Hoepffner, Jérôme

394

Abstract El'gygytgyn Crater Lake, NE Siberia was investigated for sedimentological proxies for  

E-Print Network [OSTI]

. A bioturbation index based upon these laminated and non- laminated sequences co-varies with total organic carbon that are filtered through storm berms, which limits clastic deposi- tion into the lake system. The sedimentation to magnetic susceptibility include stratigraphy, grain size, clay mineralogy and crystallinity. Earlier work

Long, Bernard

395

Extended abstract, 17th Conference on Numerical Weather Prediction August 1-5, 2005, Washington DC.  

E-Print Network [OSTI]

, a network of sensors collected numerous water vapor data. This network included ground-based GPS receivers in recovering 3D moisture information. To date, most variational analysis systems use static background error background term. Ha et al. (2003) assumed the background error covariance is diagonal in their four

Xue, Ming

396

Monthly Weather Review EARLY ONLINE RELEASE  

E-Print Network [OSTI]

are used10 to estimate flow-dependent background error covariance. Two assimilation experiments11 have been conducted using precipitation-affected radiances from passive microwave12 sensors, one for a tropical storm the propagation of information in observed14 radiances via flow-dependent background error auto- and cross

Collett Jr., Jeffrey L.

397

Comparison of noise-normalized minimum norm estimates for MEG analysis using multiple resolution metrics  

E-Print Network [OSTI]

LORETA inverse operators, on the metrics dipole localization error (DLE), spatial dispersion (SD) and overall, including individual noise covariance matrices and head geometries. We confirmed that for PSFs DLE improved procedures are used as "spatial filters." While low DLE is advantageous for the localization of a single

Henson, Rik

398

Bilateral Kernel-Based Region Detector Woon Cho, Sung-Yeol Kim, Andreas Koschan, and Mongi A. Abidi  

E-Print Network [OSTI]

. Introduction The detection of covariant regions from one image and its transformed image has been an important on an image of a Siemens star with regular beams as mentioned in [3]. MSER stably extracts a region for each by different methods on the Siemens image containing Gaussian noise (2%) from [3]. Top left to bottom right

Koschan, Andreas

399

CONDITIONAL VALUE AT RISK \\Lambda Dirk Ormoneit  

E-Print Network [OSTI]

Stanford, CA 94305­4065 ormoneit@stat.stanford.edu Ralph Neuneier Siemens AG, ZT IK 4 81730 M¨unchen Germany Ralph.Neuneier@mchp.siemens.de Abstract We suggest a new methodology to overcome several well with the prob­ lem of non­normality by estimating the covariance matrix in a suitably transformed \\Lambda

Ormoneit, Dirk

400

Bayesian analysis of single-subject fMRI data: SPM5 implementation  

E-Print Network [OSTI]

the AR coefficients A. The parameters control the observation noise precision at each voxel. The graph in fMRI (eg. 300- 400 scans) this creates a bottleneck when implementing the algorithm in MATLAB the following cross-covariances. This first set of terms depends on the design matrix only and therefore can

Penny, Will

Note: This page contains sample records for the topic "leventis theo covary" 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

Larval food quality affects adult (but not larval) immune gene expression independent of effects on general  

E-Print Network [OSTI]

immune activity was unaffected by alterations of larval diet, indicating a lack of covariation of resources to immunity in high-protein environments. Specifically, we found that increasing the nutritional yeast (protein) available to larval Drosophila melanogaster increased the adult's constitutive

Lazzaro, Brian

402

EXTREME VALUE ANALYSIS FOR CLIMATE TIME SERIES Institute for Mathematics Applied to Geosciences  

E-Print Network [OSTI]

Approach (Extremes + Non-Extremes) (8) Risk Communication under Climate Change #12;4 (1) Background · Use.isse.ucar.edu/staff/katz/ Lecture: ···/staff/katz/docs/pdf/banffrwk.pdf #12;2 Quote "Climate change undermines a basic assumption Cycles (annual, diurnal) Trends (global climate change) Physically-based covariates (e. g., El Niño

Katz, Richard

403

Sarang Joshi 10/10/2001 #1 Statistics of Shape:Statistics of Shape: EigenEigen ShapesShapes  

E-Print Network [OSTI]

HippocampalHippocampal MappingMapping Atlas Patients #12;Sarang Joshi 2/16/2003 #5 HippocampalHippocampal MappingMapping Atlas Subjects #12;' & $ %Sarang Joshi May 3, 2000 16 Shape of 2-D Sub Mg be a Gaussian random vector eld with mean mU 2 H and covariance KU of nite trace. There exists

North Carolina at Chapel Hill, University of

404

Ecology, 90(3), 2009, pp. 742753 2009 by the Ecological Society of America  

E-Print Network [OSTI]

relationships we detected between Cassin's Auklet breeding success and ocean climate conditions across widely determine the extent to which ocean climate conditions and Cassin's Auklet timing of breeding and breeding success covary across populations in British Columbia, central California, and northern Mexico over six

405

Slide 1 of 37 www.chrisbilder.com  

E-Print Network [OSTI]

Slide 1 of 37 www.chrisbilder.com Outline BSG Basics Estimation Identification Covariates NIH grant of Statistics University of Nebraska-Lincoln www.chrisbilder.com chris@chrisbilder.com Slide 2 of 37 wwwGalacticaGalactica BSG · Statistics and Battlestar Galactica · The story so far... ­ Video Slide 3 of 37 www

Bilder, Christopher R.

406

Algebras without Involution and Quantum Field Theories  

E-Print Network [OSTI]

Explicit realizations of quantum field theory (QFT) are admitted by a revision to the Wightman axioms for the vacuum expectation values (VEV) of fields. The technical development of QFT is expanded beyond positive functionals on *-algebras while the physically motivated properties: Poincare covariance; positive energy; microcausality; and a Hilbert space realization of states, are preserved.

Glenn Eric Johnson

2014-10-01T23:59:59.000Z

407

Acta Phys. Hung. B 20/1 (2004) 000000 ELECTRONICS  

E-Print Network [OSTI]

phase-covariant quantum multimeter. Both devices utilize polarization states of photon pairs generated- sibility to program the apparatus by the quantum states of another qubit system called program register cryptography [18]. In this paper we focus our attention to the unambiguous state discrimination. Let us suppose

Dusek, Miloslav

408

The Riemannian Potato: an automatic and adaptive artifact detection method for online experiments  

E-Print Network [OSTI]

The Riemannian Potato: an automatic and adaptive artifact detection method for online experiments manifold. Since the Riemannian metric is non-linear, this region of interest corresponds to a "potato" in the Riemannian manifold. Fig. 1 shows the potato for a dataset of 100 2x2 covariance matrices on simulated data

Paris-Sud XI, Université de

409

Confidence Sets for Network Structure Edoardo M. Airoldi1  

E-Print Network [OSTI]

Received 2 November 2010; revised 4 June 2011; accepted 26 July 2011 DOI:10.1002/sam.10136 Published online, and school year as covariates. We employ a stochastic expectation-maximization algorithm to fit a logistic regression model that includes these explanatory variables as well as a latent stochastic blockmodel

Needleman, Daniel

410

Quasiparticle random phase approximation uncertainties and their correlations in the analysis of neutrinoless double beta decay  

E-Print Network [OSTI]

The variances and covariances associated to the nuclear matrix elements (NME) of neutrinoless double beta decay are estimated within the quasiparticle random phase approximation (QRPA). It is shown that correlated NME uncertainties play an important role in the comparison of neutrinoless double beta decay rates for different nuclei, and that they are degenerate with the uncertainty in the reconstructed Majorana neutrino mass.

Amand Faessler; G. L. Fogli; E. Lisi; V. Rodin; A. M. Rotunno; F. Simkovic

2009-03-06T23:59:59.000Z

411

A POISSON-LOGNORMAL CONDITIONAL-AUTOREGRESSIVE MODEL FOR MULTIVARIATE SPATIAL ANALYSIS OF PEDESTRIAN CRASH COUNTS ACROSS  

E-Print Network [OSTI]

(fatal or incapacitating) and non-severe crash rates reflects latent covariates that have impacts across and William J. Murray Jr. Fellow Department of Civil, Architectural and Environmental Engineering in Accident Analysis & Prevention ABSTRACT This work examines the relationship between 3-year pedestrian crash

Kockelman, Kara M.

412

Boundary-Layer Meteorol (2008) 127:273292 DOI 10.1007/s10546-007-9254-x  

E-Print Network [OSTI]

of the Reynolds or temporally averaged heat flux at a grid point from the horizontally averaged total heat flux experiments that the eddy covariance heat fluxes are systematically underestimated as compared magnitude and its horizontal and vertical distributions. The flux imbalance of heat and the bottom­up tracer

Lee, Xuhui

413

Baryon Fluctuations in High Energy Nuclear Collisions  

E-Print Network [OSTI]

We propose that dramatic changes in the variances and covariance of protons and antiprotons can result if baryons approach chemical equilibrium in nuclear collisions at RHIC. To explore how equilibration alters these fluctuations, we formulate both equilibrium and nonequilibrium hadrochemical descriptions of baryon evolution. Contributions to fluctuations from impact parameter averaging and finite acceptance in nuclear collisions are numerically simulated.

Sean Gavin; Claude Pruneau

1999-07-09T23:59:59.000Z

414

This article was published in an Elsevier journal. The attached copy is furnished to the author for non-commercial research and  

E-Print Network [OSTI]

reduce human dietary exposure to Hg in the region. An improved method of analysis of covariance bioaccu- mulative pollutants are elevated in sport fish tissue (Fairey et al., 1997; Davis et al., 2002 exposure to methylmercury, PCBs, organochlor- ine pesticides, and dioxins (OEHHA, 1997). The Sacramento

415

Sensitivity Study of a Semi-automatic Supervised Classifier Applied to Minerals from X-Ray Mapping Images  

E-Print Network [OSTI]

Lyngby, Denmark aa@imm.dtu.dk Harald Flesche Norsk Hydro Research Centre N-5020 Bergen, Norway Harald.Flesche@nho.hydro to a small area in order to allow for the estimation of a variance-covariance matrix. This expansion is presently used as a routine petrographi- cal analysis method at Norsk Hydro Research Cen- tre. 1

416

Supporting Online Material for: Carbon in Amazon forests: Unexpected seasonal fluxes and disturbance-  

E-Print Network [OSTI]

forest, and the effects of selective logging and land-use change. Three eddy covariance towers operate the Santarém-Cuiabá highway (1), plus the Km 67 and Km 83 tower sites, which constitute a control seasonal variations in important climatic variables at this site: solar radiation, net radiation, air

417

From: John Fowler Subject: Re: Interesting Discovery About Chi-Squares  

E-Print Network [OSTI]

this doesn't show up in the covariance matrix. Of course if a Gaussian generator is used for both independent draws; therefore it takes the first Central-Limit step toward being Gaussian, assuming that the generators were not for Gaussian random variables. I have run this algorithm with uniform random variables

Masci, Frank

418

Bibliography [AB94] M. Alencar and I. Blake. The capacity for a discrete  

E-Print Network [OSTI]

, 1995. [AC97] S. Amari and J. Cardoso. Blind source separation­ semiparametric statistical approach­Spectrum communication systems. PhD thesis, University of Massachusetts, Amherst, Mass, Sept. 1996. [AD62] E. Arthurs. Moulines. Sub­ space blind identification of multichannel FIR with un­ known spatial covariance. IEEE

Verdú, Sergio

419

A two-fluid model for relativistic heat conduction  

SciTech Connect (OSTI)

Three years ago it was presented in these proceedings the relativistic dynamics of a multi-fluid system together with various applications to a set of topical problems [1]. In this talk, I will start from such dynamics and present a covariant formulation of relativistic thermodynamics which provides us with a causal constitutive equation for the propagation of heat in a relativistic setting.

López-Monsalvo, César S. [Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México (Mexico)

2014-01-14T23:59:59.000Z

420

Improved Modeling of Evapotranspiration using Satellite Remote Sensing at Varying Spatial and Temporal Scales  

E-Print Network [OSTI]

Iowa, U.S., on three Landsat TM/ETM imagery acquisition dates in 2002. Results show the EF and latent heat flux (LE) estimates with a mean absolute percentage difference (MAPD) of 6.7 percent and 8.7 percent, respectively, relative to eddy covariance...

Long, Di

2012-10-19T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

Simplifying the Analysis of C++ Programs  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 3.2 Internal Approaches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 3.3 External Approaches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 3.4 Multiple Dispatch... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 4.3.4 Covariant Return Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 4.3.5 Algorithm for Dispatch Table Generation . . . . . . . . . . . . . . . . . . . . . . . . . 56 4.3.6 Alternative Dispatch Semantics...

Solodkyy, Yuriy

2013-08-14T23:59:59.000Z

422

Robust Secure Transmission in MISO Channels With Imperfect ECSI  

E-Print Network [OSTI]

Robust Secure Transmission in MISO Channels With Imperfect ECSI Jing Huang and A. Lee Swindlehurst.huang; swindle}@uci.edu Abstract--This paper studies robust transmission schemes for MISO wiretap channels-input single-output (MISO) wiretap cannels, the optimal transmit covariance matrix was found to be single

Swindlehurst, A. Lee

423

QoS-Constrained Robust Beamforming in MISO Wiretap Channels with a Helper  

E-Print Network [OSTI]

QoS-Constrained Robust Beamforming in MISO Wiretap Channels with a Helper Jing Huang and A. Lee for multiple-input single-output (MISO) wiretap chan- nels with a helper. The channel state information (CSI]­[8]. In particular, for multiple-input single-output (MISO) wiretap channels, the optimal transmit covariance matrix

Swindlehurst, A. Lee

424

Proof of the outage probability conjecture for MISO channels  

E-Print Network [OSTI]

In Telatar 1999, it is conjectured that the covariance matrices minimizing the outage probability for MIMO channels with Gaussian fading are diagonal with either zeros or constant values on the diagonal. In the MISO setting, this is equivalent to conjecture that the Gaussian quadratic forms having largest tale probability correspond to such diagonal matrices. We prove here the conjecture in the MISO setting.

Abbe, Emmanuel; Telatar, Emre

2011-01-01T23:59:59.000Z

425

INSTITUTE OF PHYSICS PUBLISHING PHYSICA SCRIPTA Phys. Scr. 74 (2006) 6270 doi:10.1088/0031-8949/74/1/009  

E-Print Network [OSTI]

.iop.org/PhysScr/74/62 Abstract The master equation approach, which has traditionally been used for the calculation a stationary external source. The first two factorial moments are calculated, including the covariance to as `zero power reactor noise', are due to the inherent statistical properties of the individual neutron

Pázsit, Imre

426

Biodiversity as spatial insurance: the effects of habitat fragmentation and  

E-Print Network [OSTI]

habitat destruction (e.g. strip min- ing or clear cutting of forests), conversion to agri- culture (e.g. conversion of grasslands to croplands or rangelands, or conversion of forests to planta- tions that these effects may be weaker or masked by other covarying factors in the environ- ment (Grace et al. 2007, Hector

Gonzalez, Andrew

427

Evaluated Nuclear (reaction) Data from the Evaluated Nuclear Data File (ENDF)  

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

The current version is ENDF/B VII.0, released in 2006. Users can search ENDF via specialized interfaces, browse sub-libraries or download them as zipped files. Data plots can be generated through the Sigma interface. The ENDF web page also provides access to covariance data processing and plots. (Specialized Interface)

428

Mid-American Review of Sociology, Volume 3, Number 1 (SPRING, 1978): Notes and Comments  

E-Print Network [OSTI]

: John Wiley and Sons, Inc. Kim, J ae-On and Frank Kohout 1975a "Special Topics in General Linear Models." Pp. 368-97 in Norman Nie et ale (eds.), SPSS, Second Edition. New York: McGraw-Hill Book Co. 1975b "Analyis of Variance and Covariance: Subprograms...

Jacobsen, Christian Wells

1978-04-01T23:59:59.000Z

429

DOI:01.IJCOM.02.03. ACEEE Int. J. on Communication, Vol. 02, No. 03, Nov2011  

E-Print Network [OSTI]

, Saudi Arabia ntayem@pmu.edu.sa Abstract ­ In this paper, a new algorithm for a high resolution Direction in two steps. In the first step, the received signals data is decomposed in a Toeplitz form using) for the covariance matrix or singular value decomposition (SVD) for the data matrix; using EVD or SVD requires much

Paris-Sud XI, Université de

430

Examining the Generalized Waring Model for the Analysis of Traffic Crashes  

E-Print Network [OSTI]

external factors that have not been included as covariates in the model. To evaluate these models, GW models were examined using both simulated and empirical crash datasets, and the results were compared to the most commonly used NB model and the recently...

Peng, Yichuan

2013-05-03T23:59:59.000Z

431

Aerosol Science 35 (2004) 577598 www.elsevier.com/locate/jaerosci  

E-Print Network [OSTI]

-dependence of the covariance matrix of a multicomponent particle population evolving under a size-independent coagulation rate as the particle population evolves to an internally mixed, self-preserving size distribution state. Published and physical properties of aerosols are determined by particle number density, composition, shape, and size

432

Biogeosciences, 5, 421431, 2008 www.biogeosciences.net/5/421/2008/  

E-Print Network [OSTI]

, into the fluxes of sensible and latent heat and heat storage con- trols the degree of coupling between the land covariance flux measurements of sensible and latent heat, soil heat flux, net radiation, above-ground phytomass and meteorological driv- ing forces energy partitioning was investigated at a temperate mountain

Paris-Sud XI, Université de

433

4, 11371165, 2007 Suitability QCL for  

E-Print Network [OSTI]

BGD 4, 1137­1165, 2007 Suitability QCL for eddy covariance P. S. Kroon et al. Title Page Abstract Centre of the Netherlands (ECN), Department of Air Quality and Climate Change, Netherlands 2 TU Delft, Department of Multi-Scale Physics, Research group Clouds, Climate and Air Quality, Netherlands 3 Aerodyne

Boyer, Edmond

434

Best Linear Unbiased Estimate Motivation for BLUE  

E-Print Network [OSTI]

1 Chapter 6 Best Linear Unbiased Estimate (BLUE) #12;2 Motivation for BLUE Except for Linear Model to a sub-optimal estimate BLUE is one such sub-optimal estimate Idea for BLUE: 1. Restrict estimate) Advantage of BLUE:Needs only 1st and 2nd moments of PDF Mean & Covariance Disadvantages of BLUE: 1. Sub

Fowler, Mark

435

METHANE IN HYDROTF{ERMAL PLUMES ALONG TFIEEAST PACIFIC RISE, 28-32"5  

E-Print Network [OSTI]

METHANE IN HYDROTF{ERMAL PLUMES ALONG TFIEEAST PACIFIC RISE, 28-32"5 A TFMSISSUBMITTEDEPR. Molar ratiosof methane/manganesein plumesover segmentW3 indicatedmethanedid not covary with manganese,nor did methanecovarywith any otherhydrothermaltracersuchasnephelometryor heatanomalyon this segment.Methane

Luther, Douglas S.

436

On the Vacuum Propagation of Gravitational Waves  

E-Print Network [OSTI]

We show that, for any local, causal quantum field theory which couples covariantly to gravity, and which admits Minkowski spacetime vacuum(a) invariant under the inhomogeneous proper orthochronous Lorentz group, plane gravitational waves propagating in such Minkowski vacuum(a) do not dissipate energy or momentum via quantum field theoretic effects.

Xiao Liu

2007-06-05T23:59:59.000Z

437

The Annals of Statistics 2004, Vol. 32, No. 4, 15331555  

E-Print Network [OSTI]

models to condense these high-dimensional covariates in dimension reduction; then an estimate be problematic due to the high dimensionality of the auxiliary information. In this paper, we use two working the efficiency bound. 1. Introduction. Right-censored data with dependent censoring are common in many

Zeng, Donglin

438

SVR vs MLP for Phone Duration Modelling in HMM-based Speech Synthesis Alexandros Lazaridis, Pierre-Edouard Honnet, Philip N. Garner  

E-Print Network [OSTI]

, 7]. Over the last years, many im- provements have been introduced in HMM-based speech syn- thesis models of multiple levels, e.g. state and phone levels [13], state, phone and syllable levels [14], using full covariance Gaussian distribu- tion [15] or implementing Gamma distribution instead of Gaus- sian

439

Toxoplasmosis can be a sexually transmitted infection with serious clinical consequences. Not all routes of infection are created equal  

E-Print Network [OSTI]

of Philosophy and History of Science, Faculty of Science, Charles University in Prague, CZ-128 44 Prague 2, CZ-158 00, Prague 13, Czech Republic * Corresponding author: J. Flegr, Department of Philosophy be explained by the known risk factors. 3) Prevalence of toxoplasmosis in women in child- bearing age covaries

Flegr, Jaroslav

440

SEPARATION OF OVERLAPPED ELECTROCHEMICAL PEAKS USING THE KALMAN FILTER  

E-Print Network [OSTI]

Covariance Update for a 11 k ,j _0_(kjk-l)::: !! (k,k-l)·! (k-llk-1) T P(kjk-1) = H·P(k-ljk-l)·H + Q(k) f(k) = f(kjk-l)·iT(k)·[i~f(kjk~l)·iT + ~]-l ! (

Brown, T.F.

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

Small Quarkonium states in an anisotropic QCD plasma  

E-Print Network [OSTI]

We determine the hard-loop resummed propagator in an anisotropic QCD plasma in general covariant gauges and define a potential between heavy quarks from the Fourier transform of its static limit. We find that the potential exhibits angular dependence and that binding of very small quarkonium states is stronger than in an isotropic plasma.

Yun Guo

2008-05-16T23:59:59.000Z

442

Curriculum Vitae of Prathap Ramamurthy Name: Prathap Ramamurthy  

E-Print Network [OSTI]

-gas Emission Study), Employed eddy covariance technique to quantify CO2 and H2O fluxes in Salt Lake valley transported. SCERP (Nogales, Mexico): Participated in the experiment devised to reduce road dust using wind (Summer 2004 & 2005). Worked to understand turbulence transport in an idealized boundary layer. Graduate

Bou-Zeid, Elie

443

The Need for Meta-Analytic Thinking in Educational Technology Research  

E-Print Network [OSTI]

with accompanying means and standard deviations or covariance matrices. In the second study, the author conducted a meta-analysis to offer a glimpse of where the field could go once researchers begin to think meta-analytically. The author cumulated findings from...

Ritter, Nicola L.

2014-05-19T23:59:59.000Z

444

Response of mini-TLP after a level crossing  

E-Print Network [OSTI]

upon this observation the covariance function can be represented as an analytical function that can be adjusted to best fit the data. Data obtained from tests conducted at the Offshore Technology Research Center are used as the basis for a comparison...

Tysse, Leiv Andre

2000-01-01T23:59:59.000Z

445

Accepted for publication in European Journal of Operations Research, April 2004 A Bayesian Paired Comparison Approach for Relative Accident Probability  

E-Print Network [OSTI]

Comparison Approach for Relative Accident Probability Assessment with Covariate Information P. Szwed , J risks) is the quantification of accident probability, particularly in the case of rare events. Once information inherently suffers from a sparseness of accident data. Therefore, expert judgment is often

van Dorp, Johan René

446

Extreme phase and rotated quadrature measurements  

E-Print Network [OSTI]

We determine the extreme points of the convex set of covariant phase observables. Such extremals describe the best phase parameter measurements of laser light - the best in the sense that they are free from classical randomness due to fluctuations in the measuring procedure. We also characterize extreme fuzzy rotated quadratures.

Juha-Pekka Pellonpää

2009-11-03T23:59:59.000Z

447

A Sparse Bayesian Model for Dependence Analysis of Extremes: Climate Applications  

E-Print Network [OSTI]

A Sparse Bayesian Model for Dependence Analysis of Extremes: Climate Applications Debasish Das applications, such as climate, finance and social media among others, we are often interested in extreme events. An important part of modeling extremes is dis- covery of covariates on which the quantities related

Obradovic, Zoran

448

Applying Geospatial Semantic Array Programming for a Reproducible Set of Bioclimatic Indices in Europe  

E-Print Network [OSTI]

Bioclimate-driven regression analysis is a widely used approach for modelling ecological niches and zonation. Although the bioclimatic complexity of the European continent is high, a particular combination of 12 climatic and topographic covariates was recently found able to reliably reproduce the ecological zoning of the Food and Agriculture Organization of the United Nations (FAO) for forest resources assessment at pan-European scale, generating the first fuzzy similarity map of FAO ecozones in Europe. The reproducible procedure followed to derive this collection of bioclimatic indices is now presented. It required an integration of data-transformation modules (D-TM) using geospatial tools such as Geographic Information System (GIS) software, and array-based mathematical implementation such as semantic array programming (SemAP). Base variables, intermediate and final covariates are described and semantically defined by providing the workflow of D-TMs and the mathematical formulation following the SemAP notat...

Caudullo, Giovanni

2014-01-01T23:59:59.000Z

449

Application of Mutual Information Methods in Time-Distance Helioseismology  

E-Print Network [OSTI]

We apply a new technique, the mutual information (MI) from information theory, to time-distance helioseismology, and demonstrate that it can successfully reproduce several classic results based on the widely used cross-covariance method. MI quantifies the deviation of two random variables from complete independence, and represents a more general method for detecting dependencies in time series than the cross-covariance function, which only detects linear relationships. We provide a brief description of the MI-based technique and discuss the results of the application of MI to derive the solar differential profile, a travel-time deviation map for a sunspot and a time-distance diagram from quiet Sun measurements.

Keys, Dustin; Pevtsov, Alexei

2015-01-01T23:59:59.000Z

450

Gupta-Bleuler Photon Quantization in the SME  

E-Print Network [OSTI]

Photon quantization is implemented in the standard model extension (SME) using the Gupta-Bleuler method and BRST concepts. The quantization prescription applies to both the birefringent and non-birefringent CPT-even couplings. A curious incompatibility is found between the presence of the Lorentz-violating terms and the existence of a nontrivial conjugate momentum $\\Pi^0$ yielding problems with covariant quantization procedure. Introduction of a mass regulator term can avoid the vanishing of $\\Pi^0$ and allows for the implementation of a covariant quantization procedure. Field-theoretic calculations involving the SME photons can then be performed using the mass regulator, similar to the conventional procedure used in electrodynamics for infrared-divergence regulation.

Colladay, Don; Potting, Robertus

2014-01-01T23:59:59.000Z

451

Gupta-Bleuler Photon Quantization in the SME  

E-Print Network [OSTI]

Photon quantization is implemented in the standard model extension (SME) using the Gupta-Bleuler method and BRST concepts. The quantization prescription applies to both the birefringent and non-birefringent CPT-even couplings. A curious incompatibility is found between the presence of the Lorentz-violating terms and the existence of a nontrivial conjugate momentum $\\Pi^0$ yielding problems with covariant quantization procedure. Introduction of a mass regulator term can avoid the vanishing of $\\Pi^0$ and allows for the implementation of a covariant quantization procedure. Field-theoretic calculations involving the SME photons can then be performed using the mass regulator, similar to the conventional procedure used in electrodynamics for infrared-divergence regulation.

Don Colladay; Patrick McDonald; Robertus Potting

2014-01-06T23:59:59.000Z

452

Super-KMS functionals for graded-local conformal nets  

E-Print Network [OSTI]

Motivated by a few preceding papers and a question of R. Longo, we introduce super-KMS functionals for graded translation-covariant nets over R with superderivations, roughly speaking as a certain supersymmetric modification of classical KMS states on translation-covariant nets over R, fundamental objects in chiral algebraic quantum field theory. Although we are able to make a few statements concerning their general structure, most properties will be studied in the setting of specific graded-local (super-) conformal models. In particular, we provide a constructive existence and partial uniqueness proof of super-KMS functionals for the supersymmetric free field, for certain subnets, and for the super-Virasoro net with central charge c>= 3/2. Moreover, as a separate result, we classify bounded super-KMS functionals for graded-local conformal nets over S^1 with respect to rotations.

Robin Hillier

2014-07-16T23:59:59.000Z

453

A geometric algorithm for efficient coincident detection of gravitational waves  

E-Print Network [OSTI]

Data from a network of gravitational wave detectors can be analyzed in coincidence to increase detection confidence and reduce non-stationarity of the background. We propose and explore a geometric algorithm to combine the data from a network of detectors. The algorithm makes optimal use of the variances and covariances that exist amongst the different parameters of a signal in a coincident detection of events. The new algorithm essentially associates with each trigger ellipsoidal regions in parameter space defined by the covariance matrix. Triggers from different detectors are deemed to be in coincidence if their ellipsoids have a non-zero overlap. Compared to an algorithm that uses uncorrelated windows separately for each of the signal parameters, the new algorithm greatly reduces the background rate thereby increasing detection efficiency at a given false alarm rate.

C. A. K. Robinson; B. S. Sathyaprakash; Anand S. Sengupta

2008-04-30T23:59:59.000Z

454

A quantum mechanical version of Price's theorem for Gaussian states  

E-Print Network [OSTI]

This paper is concerned with integro-differential identities which are known in statistical signal processing as Price's theorem for expectations of nonlinear functions of jointly Gaussian random variables. We revisit these relations for classical variables by using the Frechet differentiation with respect to covariance matrices, and then show that Price's theorem carries over to a quantum mechanical setting. The quantum counterpart of the theorem is established for Gaussian quantum states in the framework of the Weyl functional calculus for quantum variables satisfying the Heisenberg canonical commutation relations. The quantum mechanical version of Price's theorem relates the Frechet derivative of the generalized moment of such variables with respect to the real part of their quantum covariance matrix with other moments. As an illustrative example, we consider these relations for quadratic-exponential moments which are relevant to risk-sensitive quantum control.

Igor G. Vladimirov

2014-09-15T23:59:59.000Z

455

Surface charge algebra in gauge theories and thermodynamic integrability  

SciTech Connect (OSTI)

Surface charges and their algebra in interacting Lagrangian gauge field theories are constructed out of the underlying linearized theory using techniques from the variational calculus. In the case of exact solutions and symmetries, the surface charges are interpreted as a Pfaff system. Integrability is governed by Frobenius' theorem and the charges associated with the derived symmetry algebra are shown to vanish. In the asymptotic context, we provide a generalized covariant derivation of the result that the representation of the asymptotic symmetry algebra through charges may be centrally extended. Comparison with Hamiltonian and covariant phase space methods is made. All approaches are shown to agree for exact solutions and symmetries while there are differences in the asymptotic context.

Barnich, Glenn [Physique Theorique et Mathematique, Universite Libre de Bruxelles and International Solvay Institutes, Campus Plaine, CP 231, B-1050 Bruxelles (Belgium); Compere, Geoffrey [Physique Theorique et Mathematique, Universite Libre de Bruxelles and International Solvay Institutes, Campus Plaine, CP 231, B-1050 Bruxelles (Belgium); Gravity Group, University of California at Santa Barbara, Broida Hall 9530, California 93106-9530 (United States)

2008-04-15T23:59:59.000Z

456

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

2009-02-07T23:59:59.000Z

457

A Kalman filtering technique for spacecraft attitude determination and control using Gibbs vector  

E-Print Network [OSTI]

of the state vector these equations can be represented mathematically by x(t) = f(x(t), t) + g(x(t), t)w(t) (62) where x(t) is the state vector, and w(t) is the system process noise vector assumed to be Gaussian white noise with mean and covariance given... and covariance of the system state vector are given by E(x(t )} =- x(t ) = x (64a) E[ (x(to) ? x )(x(t ) ? xo) ] - =[P(to)] = [P ] (64b) where x(t ) is the actual state vector initially, x(t ) is the expected value of the initial state vector, and [P ] is 0...

Tallant, Gregory Stephen

1988-01-01T23:59:59.000Z

458

Absence of Right-Handed Neutrino in Weak Interactions: Explanation via Nonlinear Electroweak Model  

E-Print Network [OSTI]

The nonlinear SU(2) electroweak model is used to explain the absence of the right-handed neutrino in weak interactions. Two covariant eigenvalue constraints which affect the transformation lead to two classes of right-handed leptons, and make possible invariant mass terms without the Higgs doublet. A covariant picture of neutrinos with mass is presented. A new invariant form for the boson potentials is described in which the boson mass terms arises via the adjoint field. This model also indicates a different region of matter involving coupled leptons that are "blind" to the massless electromagnetic field but "see" four massive potentials that are themselves blind to the electromagnetic field. We argue that these more difficult to detect "dark" fields provide a possible contribution to the missing mass.

Bill Dalton

2010-06-21T23:59:59.000Z

459

Semidirect product of CCR and CAR algebras and asymptotic states in quantum electrodynamics  

E-Print Network [OSTI]

A C*-algebra containing the CCR and CAR algebras as its subalgebras and naturally described as the semidirect product of these algebras is discussed. A particular example of this structure is considered as a model for the algebra of asymptotic fields in quantum electrodynamics, in which Gauss' law is respected. The appearence in this algebra of a phase variable related to electromagnetic potential leads to the universal charge quantization. Translationally covariant representations of this algebra with energy-momentum spectrum in the future lightcone are investigated. It is shown that vacuum representations are necessarily nonregular with respect to total electromagnetic field. However, a class of translationally covariant, irreducible representations is constructed excplicitly, which remain as close as possible to the vacuum, but are regular at the same time. The spectrum of energy-momentum fills the whole future lightcone, but there are no vectors with energy-momentum lying on a mass hyperboloid or in the origin.

Andrzej Herdegen

1998-07-31T23:59:59.000Z

460

Representing the vacuum polarization on de Sitter  

SciTech Connect (OSTI)

Previous studies of the vacuum polarization on de Sitter have demonstrated that there is a simple, noncovariant representation of it in which the physics is transparent. There is also a cumbersome, covariant representation in which the physics is obscure. Despite being unwieldy, the latter form has a powerful appeal for those who are concerned about de Sitter invariance. We show that nothing is lost by employing the simple, noncovariant representation because there is a closed form procedure for converting its structure functions to those of the covariant representation. We also present a vastly improved technique for reading off the noncovariant structure functions from the primitive diagrams. And we discuss the issue of representing the vacuum polarization for a general metric background.

Leonard, Katie E.; Woodard, Richard P. [Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)] [Department of Physics, University of Florida, Gainesville, Florida 32611 (United States); Prokopec, Tomislav [Institute of Theoretical Physics (ITP) and Spinoza Institute, Utrecht University, Postbus 80195, 3508 TD Utrecht (Netherlands)] [Institute of Theoretical Physics (ITP) and Spinoza Institute, Utrecht University, Postbus 80195, 3508 TD Utrecht (Netherlands)

2013-03-15T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" 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

Robust Secure Transmission in MISO Channels Based on Worst-Case Optimization  

E-Print Network [OSTI]

This paper studies robust transmission schemes for multiple-input single-output (MISO) wiretap channels. Both the cases of direct transmission and cooperative jamming with a helper are investigated with imperfect channel state information (CSI) for the eavesdropper links. Robust transmit covariance matrices are obtained based on worst-case secrecy rate maximization, under both individual and global power constraints. For the case of an individual power constraint, we show that the non-convex maximin optimization problem can be transformed into a quasiconvex problem that can be efficiently solved with existing methods. For a global power constraint, the joint optimization of the transmit covariance matrices and power allocation between the source and the helper is studied via geometric programming. We also study the robust wiretap transmission problem for the case with a quality-of-service constraint at the legitimate receiver. Numerical results show the advantage of the proposed robust design. In particular, ...

Huang, Jing

2011-01-01T23:59:59.000Z

462

Electromagnetic Properties for Arbitrary Spin Particles: Part 1 $-$ Electromagnetic Current and Multipole Decomposition  

E-Print Network [OSTI]

In a set of two papers, we propose to study an old-standing problem, namely the electromagnetic interaction for particles of arbitrary spin. Based on the assumption that light-cone helicity at tree level and $Q^2=0$ should be conserved non-trivially by the electromagnetic interaction, we are able to derive \\emph{all} the natural electromagnetic moments for a pointlike particle of \\emph{any} spin. In this first paper, we propose a transparent decomposition of the electromagnetic current in terms of covariant vertex functions. We also define in a general way the electromagnetic multipole form factors, and show their relation with the electromagnetic moments. Finally, by considering the Breit frame, we relate the covariant vertex functions to multipole form factors.

Cédric Lorcé

2009-01-27T23:59:59.000Z

463

A CSP Field Theory with Helicity Correspondence  

E-Print Network [OSTI]

We propose the first covariant local action describing the propagation of a single free continuous-spin degree of freedom. The theory is simply formulated as a gauge theory in a "vector superspace", but can also be formulated in terms of a tower of symmetric tensor gauge fields. When the spin invariant $\\rho$ vanishes, the helicity correspondence is manifest -- familiar gauge theory actions are recovered and couplings to conserved currents can easily be introduced. For non-zero $\\rho$, a tower of tensor currents must be present, of which only the lowest rank is exactly conserved. A paucity of local gauge-invariant operators for non-zero $\\rho$ suggests that the equations of motion in any interacting theory should be covariant, not invariant, under a generalization of the free theory's gauge symmetry.

Philip Schuster; Natalia Toro

2014-04-02T23:59:59.000Z

464

A CSP Field Theory with Helicity Correspondence  

E-Print Network [OSTI]

We propose the first covariant local action describing the propagation of a single free continuous-spin degree of freedom. The theory is simply formulated as a gauge theory in a "vector superspace", but can also be formulated in terms of a tower of symmetric tensor gauge fields. When the spin invariant $\\rho$ vanishes, the helicity correspondence is manifest -- familiar gauge theory actions are recovered and couplings to conserved currents can easily be introduced. For non-zero $\\rho$, a tower of tensor currents must be present, of which only the lowest rank is exactly conserved. A paucity of local gauge-invariant operators for non-zero $\\rho$ suggests that the equations of motion in any interacting theory should be covariant, not invariant, under a generalization of the free theory's gauge symmetry.

Schuster, Philip

2014-01-01T23:59:59.000Z

465

User Guide for the STAYSL PNNL Suite of Software Tools  

SciTech Connect (OSTI)

The STAYSL PNNL software suite provides a set of tools for working with neutron activation rates measured in a nuclear fission reactor, an accelerator-based neutron source, or any neutron field to determine the neutron flux spectrum through a generalized least-squares approach. This process is referred to as neutron spectral adjustment since the preferred approach is to use measured data to adjust neutron spectra provided by neutron physics calculations. The input data consist of the reaction rates based on measured activities, an initial estimate of the neutron flux spectrum, neutron activation cross sections and their associated uncertainties (covariances), and relevant correction factors. The output consists of the adjusted neutron flux spectrum and associated covariance matrix, which is useful for neutron dosimetry and radiation damage calculations.

Greenwood, Lawrence R.; Johnson, Christian D.

2013-02-27T23:59:59.000Z

466

Extremal quantum cloning machines  

E-Print Network [OSTI]

We investigate the problem of cloning a set of states that is invariant under the action of an irreducible group representation. We then characterize the cloners that are "extremal" in the convex set of group covariant cloning machines, among which one can restrict the search for optimal cloners. For a set of states that is invariant under the discrete Weyl-Heisenberg group, we show that all extremal cloners can be unitarily realized using the so-called "double-Bell states", whence providing a general proof of the popular ansatz used in the literature for finding optimal cloners in a variety of settings. Our result can also be generalized to continuous-variable optimal cloning in infinite dimensions, where the covariance group is the customary Weyl-Heisenberg group of displacements.

G. Chiribella; G. M. D'Ariano; P. Perinotti; N. J. Cerf

2005-07-14T23:59:59.000Z

467

Green Functions For Wave Propagation on a 5D manifold and the Associated Gauge Fields Generated by a Uniformly Moving Point Source  

E-Print Network [OSTI]

Gauge fields associated with the manifestly covariant dynamics of particles in (3,1) spacetime are five-dimensional. We provide solutions of the classical 5D gauge field equations in both (4,1) and (3,2) flat spacetime metrics for the simple example of a uniformly moving point source. Green functions for the 5D field equations are obtained, which are consistent with the solutions for uniform motion obtained directly from the field equations with free asymptotic conditions.

I. Aharonovich; L. P. Horwitz

2006-03-31T23:59:59.000Z

468

Green's Function expansion of scalar and vector fields in the presence of a medium  

E-Print Network [OSTI]

Based on a canonical approach and functional-integration techniques, a series expansion of Green's function of a scalar field, in the presence of a medium, is obtained. A series expansion for Lifshitz-energy, in finite-temperature, in terms of the susceptibility of the medium is derived and the whole formalism is generalized to the case of electromagnetic field in the presence of some dielectrics. A covariant formulation of the problem is presented.

Fardin Kheirandish; Shahriar Salimi

2010-10-17T23:59:59.000Z

469

Multidimensional Deterministic Nuclear Data Sensitivity and Uncertainty Code System: Method and Application  

SciTech Connect (OSTI)

In the nuclear industry, an increased demand exists to provide modeling results with credible confidence bounds not only for simple but also for refined modeling. With the objective to facilitate and promote such analysis, a user-friendly and complete computer code package was developed comprising the multidimensional cross-section sensitivity and uncertainty code package SUSD3D, the secondary angular distribution (SAD) covariance data-processing module ERRORR34, and the cross-section covariance matrix library ZZ-VITAMIN-J/COVA.The discrete ordinates sensitivity formulation of the first-order perturbation theory is implemented in the SUSD3D code. Much effort was devoted to mitigate some drawbacks of the discrete ordinates-based sensitivity analysis, in particular to allow the analysis of complex geometries and to reduce memory requirements. The SUSD3D code is linked via interface files to a wide range of state-of-the-art transport codes suitable for complex radiation transport and facility design studies (like ANISN, DOT-3.5, DANTSYS, DORT, and TORT) and supports the new cross-section and covariance data formats. The SAD and secondary energy distribution effects can be taken into account. The complete SAD covariance matrices, as available in the European Fusion File evaluations (EFF-2 and -3) can be treated. The computer codes are written in FORTRAN-77 and run under DOS (PC), UNIX (workstations), VMS (VAX), and other compatible operating systems.The code system is extensively used to study fission- and fusion-related problems. The validation and several practical applications of the package are presented, including the reactor pressure vessel surveillance uncertainty studies, and ASPIS-iron, VENUS-3, and FNG benchmark experiment analyses.

Kodeli, Ivan [Jozef Stefan Institute, Ljubljana (Slovenia)

2001-05-15T23:59:59.000Z

470

Spin-2 particles in gravitational fields  

E-Print Network [OSTI]

We give a solution of the wave equation for massless, or massive spin-2 particles propagating in a gravitational background. The solution is covariant, gauge-invariant and exact to first order in the background gravitational field. The background contribution is confined to a phase factor from which geometrical and physical optics can be derived. The phase also describes Mashhoon's spin-rotation coupling and, in general, the spin-gravity interaction.

G. Papini

2007-02-01T23:59:59.000Z

471

Energy of spherically symmetric spacetimes on regularizing teleparallelism  

E-Print Network [OSTI]

We calculate the total energy of an exact spherically symmetric solutions, i.e., Schwarzschild and Reissner Nordstr$\\ddot{o}$m, using the gravitational energy-momentum 3-form within the tetrad formulation of general relativity. We explain how the effect of the inertial makes the total energy unphysical! Therefore, we use the covariant teleparallel approach which makes the energy always physical one. We also show that the inertial has no effect on the calculation of momentum.

G. G. L. Nashed

2010-04-11T23:59:59.000Z

472

Characterization of carcass traits of bulls in five cattle breeds and their diallel crosses  

E-Print Network [OSTI]

ir. the analyses with slaughter weight as the covariate. Little or no char ge of rank of the straightbreds was observed for condition core (scale i-g), marbling, conformation or final grade. Mod- erate rani; change was seen for head weight, hide... fall before goirg into the feedlot (deferred management). Steers showed a greater advantage over heifers in th" deferred manage- ment system then when both were put directly into the feedlot. Anderson et al. (1978) compared the effects of creep...

Baker, Jerome Frank

1979-01-01T23:59:59.000Z

473

Non-metric gravity: A status report  

E-Print Network [OSTI]

We review the status of a certain (infinite) class of four-dimensional generally covariant theories propagating two degrees of freedom that are formulated without any direct mention of the metric. General relativity itself (in its Plebanski formulation) belongs to the class, so these theories are examples of modified gravity. We summarize the current understanding of the nature of the modification, of the renormalizability properties of these theories, of their coupling to matter fields, and describe some of their physical properties.

Kirill Krasnov

2007-11-05T23:59:59.000Z

474

Cosmology, Thermodynamics and Matter Creation  

E-Print Network [OSTI]

Several approaches to the matter creation problem in the context of cosmological models are summarily reviewed. A covariant formulation of the general relativistic imperfect simple fluid endowed with a process of matter creation is presented. By considering the standard big bang model, it is shown how the recent results of Prigogine et alii \\cite{1} can be recovered and, at the same time their limits of validity are explicited.

J. A. S. Lima; M. O. Calvao; I. Waga

2007-08-24T23:59:59.000Z

475

Energy conservation and equivalence principle in General Relativity  

E-Print Network [OSTI]

The generalized Stokes theorem (connecting integrals of dimensions 3 and 4) is formulated in a curved space-time in terms of paths in Minkowski space (forming Path Group). A covariant integral form of the conservation law for the energy-momentum of matter is then derived in General Relativity. It extends Einstein's equivalence principle on the energy conservation, since it formulates the conservation law for the energy-momentum of matter without explicit including the gravitational field in the formulation.

Michael B. Mensky

2004-09-30T23:59:59.000Z

476

The Lagrangian formulation of the gravitational field equations in general relativity  

E-Print Network [OSTI]

. Einstein stated that this energy tensor was 7 xk proportional to a differential expression of the second order formed only from the metric tensor a ? . Then following his basic principle 9qk of covariance, he postulated that the differential equation...THE LAGRANGIAN FORMULATION OF THE GRAVITATIONAL FIELD EQUATIONS IN GENERAL RELATIVITY A Thesis JOSEPH DAVID ZUND Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment of the requirements...

Zund, Joe David

1961-01-01T23:59:59.000Z

477

The Standard Model and Fermion Masses  

E-Print Network [OSTI]

The paper formulates the Standard Model with massive fermions without introduction of the Yukawa interaction of Higgs bosons with fermions. For invariance to be preserved in the newly stated theory, the covariant derivative should be generalized, as follows. With such approach, Higgs bosons are responsible only for the gauge invariance of the boson sector of the theory and interact only with gauge bosons, gluons and photons.

V. P. Neznamov

2008-06-27T23:59:59.000Z

478

Static post-Newtonian equivalence of GR and gravity with a dynamical preferred frame  

E-Print Network [OSTI]

A generally covariant extension of general relativity (GR) in which a dynamical unit timelike vector field is coupled to the metric is studied in the asymptotic weak field limit of spherically symmetric static solutions. The two post-Newtonian parameters known as the Eddington-Robertson-Schiff parameters are found to be identical to those in the case of pure GR, except for some non-generic values of the coefficients in the Lagrangian.

Christopher Eling; Ted Jacobson

2004-02-28T23:59:59.000Z

479

Initial value constraints with tensor matter  

E-Print Network [OSTI]

In generally covariant metric gravity theories with tensor matter fields, the initial value constraint equations, unlike in general relativity, are in general not just the 0\\mu-components of the metric field equation. This happens because higher derivatives can occur in the matter stress tensor. A universal form for these constraints is derived here from a generalized Bianchi identity that includes matter fields. As an application, the constraints for Einstein-aether theory are found.

Ted Jacobson

2011-08-06T23:59:59.000Z

480

Effects of source and level of zinc on feedlot performance and carcass characteristics in steers  

E-Print Network [OSTI]

carcass weight as a covariate. Steers fed ZnSO4 gained faster (P <.05) than steers fed ZnMet (2.01 vs 1.85 kg/d .?048). However, feed intake and feed efficiency were similar for ZnSO4 and ZnMet supplemented steers (I 1.2 vs 10.9 kg/d and 178 vs 170 g gain...

Nunnery, Greg Alan

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "leventis theo covary" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


481

Field Equations and Conservation Laws in the Nonsymmetric Gravitational Theory  

E-Print Network [OSTI]

The field equations in the nonsymmetric gravitational theory are derived from a Lagrangian density using a first-order formalism. Using the general covariance of the Lagrangian density, conservation laws and tensor identities are derived. Among these are the generalized Bianchi identities and the law of energy-momentum conservation. The Lagrangian density is expanded to second-order, and treated as an ``Einstein plus fields'' theory. From this, it is deduced that the energy is positive in the radiation zone.

J. Legare; J. W. Moffat

1994-12-08T23:59:59.000Z

482

Retail market test: An in-depth evaluation of a new product concept for lamb.  

E-Print Network [OSTI]

Consumer panel test 42 42 43 Design of Consumer Purchase and Acceptance Test ~ 44 Retail store test 45 Test city criteria Sales analysis procedure Promotional campaign Television Newspaper Radio Point-of-Purchase 47 47 47 47 In... Multiple covariance analysis Field Organization for the Market Test 50 50 VI THE RETAIL STORE TEST 52 General Consumer Awareness 52 General Sales Analysis Lamb sales analysis Summary Pork sales analysis Beef sales analysis 53 53 57 58 59...

Naylor, Robert Kenneth

1967-01-01T23:59:59.000Z

483

Spin-gravity coupling and gravity-induced quantum phases  

E-Print Network [OSTI]

External gravitational fields induce phase factors in the wave functions of particles. The phases are exact to first order in the background gravitational field, are manifestly covariant and gauge invariant and provide a useful tool for the study of spin-gravity coupling and of the optics of particles in gravitational or inertial fields. We discuss the role that spin-gravity coupling plays in particular problems.

Giorgio Papini

2007-09-06T23:59:59.000Z

484

The nuclear symmetry energy and other isovector observables from the point of view of nuclear structure  

E-Print Network [OSTI]

In this contribution, we review some works related with the extraction of the symmetry energy parameters from isovector nuclear excitations, like the giant resonances. Then, we move to the general issue of how to assess whether correlations between a parameter of the nuclear equation of state and a nuclear observable are robust or not. To this aim, we introduce the covariance analysis and we discuss some counter-intuitive, yet enlightening, results from it.

G. Colo'; X. Roca-Maza; N. Paar

2015-04-08T23:59:59.000Z

485

Ris-R-1508(EN) ACCENT-BIAFLUX Workshop 2005  

E-Print Network [OSTI]

Department: Wind Energy Department Risø-R-1508(EN) April 2005 ISSN 0106-2840 ISBN 87-550-3421-7 Contract no emissions 8 1.4 Particle fluxes above forests 10 1.5 Spectral methods for estimation of fluxes of scalars 11 Measurements above Norway Spruce 13 1.8 (P2) Eddy covariance flux measurements of NO and NO2/NOy over a mixed

486

Statistical properties of chaotic binary sequences  

E-Print Network [OSTI]

Mean value and cross-covariance function of chaotic binary sequences are evaluated for chaotic maps with specific properties. We also take into account the effect of fixed- and floating-point representations on statistical properties of chaotic generators. Thus, one is able to obtain possible candidates for pseudo-random binary sequences generation. Results of statistical tests applied to chaotic binary sequences are presented. The chaotic binary sequences thus obtained could be used for security improvement in IEEE 802.11 standard.

Bogdan Cristea

2008-05-28T23:59:59.000Z

487

Inhomogeneous High Frequency Expansion-Free Gravitational Waves  

E-Print Network [OSTI]

We describe a natural inhomogeneous generalization of high frequency plane gravitational waves. The waves are high frequency waves of the Kundt type whose null propagation direction in space-time has vanishing expansion, twist and shear but is not covariantly constant. The introduction of a cosmological constant is discussed in some detail and a comparison is made with high frequency gravity waves having wave fronts homeomorphic to 2-spheres.

C. Barrabes; P. A. Hogan

2007-06-18T23:59:59.000Z

488

Initial data for Einstein's equations with superposed gravitational waves  

E-Print Network [OSTI]

A method is presented to construct initial data for Einstein's equations as a superposition of a gravitational wave perturbation on an arbitrary stationary background spacetime. The method combines the conformal thin sandwich formalism with linear gravitational waves, and allows detailed control over characteristics of the superposed gravitational wave like shape, location and propagation direction. It is furthermore fully covariant with respect to spatial coordinate changes and allows for very large amplitude of the gravitational wave.

Harald P. Pfeiffer; Lawrence E. Kidder; Mark A. Scheel; Deirdre Shoemaker

2005-02-22T23:59:59.000Z

489

$E_8$ geometry  

E-Print Network [OSTI]

We investigate exceptional generalised diffeomorphisms based on $E_{8(8)}$ in a geometric setting. The transformations include gauge transformations for the dual gravity field. The surprising key result, which allows for a development of a tensor formalism, is that it is possible to define field-dependent transformations containing connection, which are covariant. We solve for the spin connection and construct a curvature tensor. A geometry for the Ehlers symmetry SL(n+1) is sketched. Some related issues are discussed.

Cederwall, Martin

2015-01-01T23:59:59.000Z

490

Horizon Mechanics and Asymptotic Symmetries with a Immirzi-like Parameter in 2+1 Dimensions  

E-Print Network [OSTI]

Starting with a generalized theory of 2+1 gravity containing an Immirzi like parameter, we derive the modified laws of black hole mechanics using the formalism of weak isolated horizons. Definitions of horizon mass and angular momentum emerge naturally in this framework. We further go on to analyze the asymptotic symmetries, as first discussed by Brown and Henneaux, and analyze their implications in a completely covariant phase space framework.

Rudranil Basu; Ayan Chatterjee

2011-04-06T23:59:59.000Z

491

Relativistic Approach to the Hydrogen Atom in a Minimal Length Scenario  

E-Print Network [OSTI]

In this work we show that relativistic contributions to the ground state energy of the hydrogen atom arising from the presence of a minimal length introduced by a Lorentz-covariant algebra are more relevant than non-relativistic ones, and because of this the non-relativistic approach is not suitable. In addition, comparing our result with experimental data we can roughly estimate the upper bound for the minimal length value of the order $10^{-20}m$.

R. O. Francisco; T. L. Antonacci Oakes; J. C. Fabris; J. A. Nogueira

2014-02-19T23:59:59.000Z

492

Is there an Ay problem in low-energy neutron-proton scattering?  

E-Print Network [OSTI]

We calculate Ay in neutron-proton scattering for the interactions models WJC-1 and WJC-2 in the Covariant Spectator Theory. We find that the recent 12 MeV measurements performed at TUNL are in better agreement with our results than with the Nijmegen Phase Shift Analysis of 1993, and after reviewing the low-energy data, conclude that there is no Ay problem in low-energy np scattering.

Franz Gross; Alfred Stadler

2008-08-21T23:59:59.000Z

493

Application of the Veneziano model to the analysis of three pion charmonium decays  

SciTech Connect (OSTI)

We adapt the Veneziano model to the analysis of vector charmonium decays. Starting from a set of covariant Veneziano terms we show how to construct partial waves amplitudes that receive contributions from selected Regge trajectories. The amplitudes, nevertheless retain the proper asymptotic limit. This arises from duality between directly produced resonances and cross-channel Reggeon and in practical applications helps remove uncertainties in the parametrization of backgrounds.

Szczepaniak, Adam P.; Pennington, Michael R [JLAB

2014-10-01T23:59:59.000Z

494

Self-esteem and life satisfaction of aged individuals with and without access to computer training  

E-Print Network [OSTI]

)???????????????????????????????? 78 4 Univariate General Linear Model for Treatment Condition and the Rosenberg Self-esteem Scale (RSE)???????????????????? 80 5 Pre and Posttest Mean Scores and Standard Deviations as a Function of the Life Satisfaction... Index-Z and Group Placement??? 82 6 Analysis for Covariance for Treatment Condition and the Life Satisfaction Index-Z (LSI-Z)???????????????????????????? 84 7 Univariate General Linear Model for Treatment Condition and the Life...

Brown, Cindy Ann

2005-02-17T23:59:59.000Z

495

Bounds on Quantum Multiple-Parameter Estimation with Gaussian State  

E-Print Network [OSTI]

We investigate the quantum Cramer-Rao bounds on the joint multiple-parameter estimation with the Gaussian state as a probe. We derive the explicit right logarithmic derivative and symmetric logarithmic derivative operators in such a situation. We compute the corresponding quantum Fisher information matrices, and find that they can be fully expressed in terms of the mean displacement and covariance matrix of the Gaussian state. Finally, we give some examples to show the utility of our analytical results.

Yang Gao; Hwang Lee

2014-07-28T23:59:59.000Z

496

Renormalized Light Front Hamiltonian in the Pauli-Villars Regularization  

E-Print Network [OSTI]

We address the problem of nonperturbative calculations on the light front in quantum field theory regularized by Pauli-Villars method. As a preliminary step we construct light front Hamiltonians in (2+1)-dimensional $\\lambda\\phi^4$ model, for the cases without and with spontaneous symmetry breaking. The renormalization of these Hamiltonians in Pauli-Villars regularization is carried out via comparison of all-order perturbation theory, generated by these Hamiltonians, and the corresponding covariant perturbation theory in Lorentz coordinates.

M. Yu. Malyshev; S. A. Paston; E. V. Prokhvatilov; R. A. Zubov

2014-09-03T23:59:59.000Z

497

Nuclear energy density functionals: what we can learn about/from their global performance?  

E-Print Network [OSTI]

A short review of recent results on the global performance of covariant energy density functionals is presented. It is focused on the analysis of the accuracy of the description of physical observables of ground and excited states as well as to related theoretical uncertainties. In addition, a global analysis of pairing properties is presented and the impact of pairing on the position of two-neutron drip line is discussed.

A. V. Afanasjev; S. E. Agbemava; D. Ray; P. Ring

2015-01-17T23:59:59.000Z

498

(Non)renormalizability of the D-deformed Wess-Zumino model  

SciTech Connect (OSTI)

We continue the analysis of the D-deformed Wess-Zumino model that we introduced in M. Dmitrijevic and V. Radovanovic, J. High Energy Phys. 04 (2009) 108. The model is defined by a deformation that is non-Hermitian and given in terms of the covariant derivatives D{sub {alpha}.} We calculate one-loop divergences in the two-point, three-point, and four-point Green functions. Possibilities to render the model renormalizable are discussed.

Dimitrijevic, Marija [INFN Gruppo collegato di Alessandria, Via Bellini 25/G, 15100 Alessandria (Italy); University of Belgrade, Faculty of Physics Studentski trg 12, 11000 Beograd (Serbia); Nikolic, Biljana; Radovanovic, Voja [University of Belgrade, Faculty of Physics Studentski trg 12, 11000 Beograd (Serbia)

2010-05-15T23:59:59.000Z

499

Quaternion Gravi-Electromagnetism  

E-Print Network [OSTI]

Defining the generalized charge, potential, current and generalized fields as complex quantities where real and imaginary parts represent gravitation and electromagnetism respectively, corresponding field equation, equation of motion and other quantum equations are derived in manifestly covariant manner. It has been shown that the field equations are invariant under Lorentz as well as duality transformations. It has been shown that the quaternionic formulation presented here remains invariant under quaternion transformations.

A. S. Rawat; O. P. S. Negi

2011-07-05T23:59:59.000Z

500

A consideration of a micro-Phillips' Curve  

E-Print Network [OSTI]

-Phillips' Curves using an SMSA as the definition of a labor market. Sixteen SMSA's were separately studied by regressing wage changes on the unemployment rate and the rate of change of unemploy- ment for monthly data. The sixteen SMSA's were then pooled via a... covariance model to form a national labor market. iv It was found that the estimated regression coefficient for the unemployment rate was insignificant at the . 10 level of significance on both the aggregate and disaggregate level. This suggests...

Paczkowski, Walter Richard

2012-06-07T23:59:59.000Z