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54

Jul 20, 2013
07/13

by
V. Dmitrašinović

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We show how the linear "low-density theorem" of Drukarev and Levin can be extended to arbitrary positive integer power of the baryon density $\rho$. The n^th coefficient in the McLaurin expansion of the fermion condensate's $\rho$ dependence is the connected n-nucleon sigma term matrix element. We calculate the $O(\rho^2)$ coefficient in lowest-order perturbative approximation to the linear sigma model and then show how this and other terms can be iterated to arbitrarily high order....

Source: http://arxiv.org/abs/nucl-th/9902054v1

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131

Jul 20, 2013
07/13

by
Radoslaw Szmytkowski

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Closure relations satisfied by the radial Dirac-Coulomb Sturmians are proved analytically. The Sturmian expansion of the Dirac-Coulomb Green function is transformed to the form containing only series with summations running over non-negative indices. The main paper was published in J. Phys. B: At. Mol. Opt. Phys. 30 (1997) 825-61 [Erratum: 30 (1997) 2747], see also J. Phys. A: Math. Gen. 31 (1998) 4963--90 [Erratum: 31 (1998) 7415-6].

Source: http://arxiv.org/abs/physics/9902050v1

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Jul 20, 2013
07/13

by
Alexander Molev; Maxim Nazarov

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We extend the Capelli identities (1890) from the Lie algebra $gl_N$ to the other two classical Lie algebras $so_N$ and $sp_N$. We employ the theory of reductive dual pairs due to Howe. Our technique comes from the representation theory of Yangians.

Source: http://arxiv.org/abs/q-alg/9712021v3

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93

Jul 20, 2013
07/13

by
Th. Pillo; J. Hayoz; H. Berger; M. Grioni; L. Schlapbach; P. Aebi

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We report high resolution angle-scanned photoemission and Fermi surface (FS) mapping experiments on the layered transition-metal dichalcogenide 1T-TaS_2 in the quasi commensurate (QC) and the commensurate (C) charge-density-wave (CDW) phase. Instead of a nesting induced partially removed FS in the CDW phase we find a pseudogap over large portions of the FS. This remnant FS exhibits the symmetry of the one-particle normal state FS even when passing from the QC-phase to the C-phase. Possibly,...

Source: http://arxiv.org/abs/cond-mat/9902327v1

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78

Jul 20, 2013
07/13

by
H. -W. Lee

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We study phase coherent transport in a single channel system using the scattering matrix approach. It is shown that identical vanishing of the transmission amplitude occurs generically in quasi-1D systems if the time-reversal is a good symmetry. The transmission zeros naturally lead to abrupt phase changes (without any intrinsic energy scale) and in-phase resonances, providing insights to recent experiments on phase coherent transport through a quantum dot.

Source: http://arxiv.org/abs/cond-mat/9902160v2

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Sep 23, 2013
09/13

by
Philip R. Page

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New experimental information on the non-exotic J^PC = 0^-+ isovector seen at 1.8 GeV by VES yields convincing evidence of its excited gluonic (hybrid) nature when a critical study of alternative quarkonium assignments is made in the context of ^3 P_0 decay by flux-tube breaking. Production of this gluonic excitation via meson exchange is promising, although its two photon production vanishes.

Source: http://arxiv.org/abs/hep-ph/9607476v2

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40

Jul 20, 2013
07/13

by
Jusak Tandean

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We study the |Delta I|=3/2 amplitudes of the octet-hyperon decays B -> B' + pion and of the decays Omega^- -> Cascade + pion in the context of heavy-baryon chiral perturbation theory. For the octet-hyperon decays, we investigate the theoretical uncertainty of the lowest-order predictions by calculating the leading non-analytic corrections. We find that these corrections are within the expectations of naive power counting and, therefore, that this picture can be tested more accurately with...

Source: http://arxiv.org/abs/hep-ph/9902433v1

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Jul 20, 2013
07/13

by
Jean-Pierre Derendinger

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A universal effective supergravity Lagrangian describing the thermal phases of heterotic strings on T^4 x S^1, IIA and IIB strings on K^3 x S^1 is constructed. The resulting non-perturbative phase structure is discussed.

Source: http://arxiv.org/abs/hep-th/9902107v1

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Jul 20, 2013
07/13

by
Arvind Rajaraman; Moshe Rozali

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We discuss the quantization of the Green-Schwarz string action on $AdS_5 \times S^5$. We construct consistent, globally well-defined, gauge fixing choices for kappa symmetry and worldsheet diffeomorphism invariance. We then proceed to quantize the theory in a perturbation series in the inverse radius of curvature, in a background field expansion. We discuss vertex operators and correlation functions, and demonstrate agreement with supergravity results in the appropriate limit.

Source: http://arxiv.org/abs/hep-th/9902046v2

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Jul 20, 2013
07/13

by
Alice Rogers

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Nonsingularity conditions are established for the BFV gauge-fixing fermion which are sufficient for it to lead to the correct path integral for a theory with constraints canonically quantized in the BFV approach. The conditions ensure that anticommutator of this fermion with the BRST charge regularises the path integral by regularising the trace over non-physical states in each ghost sector. The results are applied to the quantization of a system which has a Gribov problem, using a non-standard...

Source: http://arxiv.org/abs/hep-th/9902133v1

Administrative Source Sahitya Akademi, Delhi ( SAK ) Identifier 405 Title Akademi Exhibition 1998 Alternative SAK-405-AC Medium Audio Cassette ExtentOriginal 00:09:10 Spatial New Delhi Temporal Cultural Event Created 22.02.1999 Rights Sahitya Akademi Descriptive Subject Akademi Exhibition 1998 Keywords Akademi Exhibition, Sahitya Akademi, New Delhi Description This audio documents the Akademi Exhibition 1998 at Sahitya Akademi, New Delhi. Creator Sahitya Akademi Type Audio Cassette ( AC )...

Topic: Akademi Exhibition 1998

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Aug 6, 2018
08/18

by
Government of India

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The Gazette of India Date: 1999-2-26 Type: Extraordinary Part Number: Part II-Section 3-Sub-Section(ii) Reference Number: 134(E) Department: CSL Ministry: Presidents Secretariat Office: CSL Subject: The Central Government hereby appoints the officer mentioned in column (1) of the t a b l e below being a Gazetted Officer of the Government to be Estate Officer for the purposes of the said Act who shall exercise

Topics: Gazette of India, Extraordinary Gazette of India

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90

Sep 20, 2013
09/13

by
D. Ibaceta; E. Calzetta

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The objective of this paper is to study the formation of defects in a non equilibrium second order phase transition by means of a numerical solution of the full dynamical equations, and to compare the results with theoretical predictions to be found in the literature. We simulate an instantaneous quench to zero temperature in a type II superconductor, measuring the actual density of defects and its theoretically expected value as a function of time. We also characterize quantitatively some...

Source: http://arxiv.org/abs/hep-ph/9810301v2

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Jul 20, 2013
07/13

by
M. Laine

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We review the motivation for, lattice results on, and some implications of, external magnetic fields present at the time of the cosmological electroweak phase transition.

Source: http://arxiv.org/abs/hep-ph/9902282v1

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Jul 20, 2013
07/13

by
R. E. Allen

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In a new theory, local Lorentz invariance is a low-energy symmetry which no longer holds when a fermion energy E is well above 1 TeV. Here we find that the modified E(p) relation is consistent with observation, and is in fact nearly the same as in Einstein relativity. On the other hand, there is a strong modification of the fermion equation of motion and propagator at ultrahigh energy, which should lead to observable effects.

Source: http://arxiv.org/abs/hep-ph/9902228v1

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Jul 20, 2013
07/13

by
Daniel Boer

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We discuss possible origins of transverse spin asymmetries in hadron-hadron collisions and propose an explanation in terms of a chiral-odd T-odd distribution function with intrinsic transverse momentum dependence, which would signal a correlation between the transverse spin and the transverse momentum of quarks inside an unpolarized hadron. We will argue that despite its conceptual problems, it can account for single spin asymmetries, for example in p + p(transversely polarized) -> pion + X,...

Source: http://arxiv.org/abs/hep-ph/9902255v2

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Jul 20, 2013
07/13

by
Yosef Nir; Yael Shadmi

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The experimental data on atmospheric and solar neutrinos are used to test the framework of non-anomalous Abelian horizontal gauge symmetries with only three light active neutrinos. We assume that the hierarchy in mass-squared splittings is not accidental and that the small breaking parameters are not considerably larger than 0.2. We find that the small angle MSW solution of the solar neutrino problem can only be accommodated if the $\nu_\mu-\nu_\tau$ mass hierarchy depends on the charges of at...

Source: http://arxiv.org/abs/hep-ph/9902293v2

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Jul 20, 2013
07/13

by
Christopher D. Carone

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We consider gauge unification in nonminimal models with extra spacetime dimensions above the TeV scale. We study the possibility that only a a subset of the supersymmetric standard model gauge and Higgs fields live in the higher dimensional `bulk'. In two of the models we present, a choice for bulk MSSM matter fields can be found that preserves approximate gauge unification. This is true without the addition of any exotic matter multiplets, beyond the chiral conjugate mirror fields required to...

Source: http://arxiv.org/abs/hep-ph/9902407v2

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Jul 20, 2013
07/13

by
Hisakazu Minakata; Hiroshi Nunokawa

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We perform an updated model-independent analysis using all the latest solar neutrino data, including the one coming from remarkably high statistics SuperKamiokande experiment. We confirm that the astrophysical solutions to the solar neutrino problem are extremely disfavored. We also present a new way of illuminating the suppression pattern of various solar neutrino flux, which indicates that the strong suppression of $^{7}$Be neutrinos is no more true once the neutrino flavor conversion is...

Source: http://arxiv.org/abs/hep-ph/9902460v1

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Jul 20, 2013
07/13

by
D. N. Sheng; Z. Y. Weng

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We demonstrate a universal scaling form of longitudinal resistance in the quantum critical region of metal-insulator transitions, based on numerical results of three-dimensional Anderson transitions (with and without magnetic field), two-dimensional quantum Hall plateau to insulator transition, as well as experimental data of the recently discovered two-dimensional metal-insulator transition. The associated reflection symmetry and a peculiar logarithmic form of the beta function exist over a...

Source: http://arxiv.org/abs/cond-mat/9902231v2

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83

Jul 20, 2013
07/13

by
Deepak Dhar

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We present some analytical results for the stochastic sandpile model, studied earlier by Manna. In this model, the operators corresponding to particle addition at different sites commute. The eigenvalues of operators satisfy a system of coupled polynomial equations. For an L X L square, we construct a nontrivial toppling invariant, and hence a ladder operator which acting on eigenvectors of evolution operator gives new eigenvectors with different eigenvalues. For periodic boundary conditions in...

Source: http://arxiv.org/abs/cond-mat/9902137v2

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95

Jul 20, 2013
07/13

by
I. Tsukada; Y. Sasago; K. Uchinokura; A. Zheludev; S. Maslov; G. Shirane; K. Kakurai; E. Ressouche

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The new antiferromagnetic (AF) compound BaCu_2Si_2O_7 is studied by magnetic susceptibility and neutron scattering techniques. The observed behavior is dominated by the presence of loosely coupled S=1/2 chains with the intrachain AF exchange constant J = 24.1 meV. Long-range Neel ordering is observed below Tn = 9.2 K. The results are discussed within the framework of the Mean Field-RPA model for weakly interacting quantum spin chains.

Source: http://arxiv.org/abs/cond-mat/9902251v1

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Jul 20, 2013
07/13

by
Cecilia Clementi; Paolo Carloni; Amos Maritan

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Fundamental questions about the role of the quaternary structures are addressed using a statistical mechanics off-lattice model of a dimer protein. The model, in spite of its simplicity, captures key features of the monomer-monomer interactions revealed by atomic force experiments. Force curves during association and dissociation are characterized by sudden jumps followed by smooth behavior and form hysteresis loops. Furthermore, the process is reversible in a finite range of temperature...

Source: http://arxiv.org/abs/cond-mat/9902227v1

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Jul 20, 2013
07/13

by
C. Bennemann; J. Baschnagel; W. Paul; K. Binder

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We report results of molecular-dynamics simulations for a glassy polymer melt consisting of short, linear bead-spring chains. It was shown in previous work that this onset of the glassy slowing down is compatible with the predictions of the mode coupling theory. The physical process of `caging' of a monomer by its spatial neighbors leads to a distinct two step behavior in the particle mean square displacements. In this work we analyze the effects of this caging process on the Rouse description...

Source: http://arxiv.org/abs/cond-mat/9902358v1

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Jul 20, 2013
07/13

by
Andris Ambainis

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We show that any quantum algorithm searching an ordered list of n elements needs to examine at least 1/12 log n-O(1) of them. Classically, log n queries are both necessary and sufficient. This shows that quantum algorithms can achieve only a constant speedup for this problem. Our result improves lower bounds of Buhrman and de Wolf(quant-ph/9811046) and Farhi, Goldstone, Gutmann and Sipser (quant-ph/9812057).

Source: http://arxiv.org/abs/quant-ph/9902053v1

This is a New Zealand classification of Planet Of The Gapes . Title Planet Of The Gapes Publication number 9801370 Application number 980100483 Medium Video Recording VHS/PAL Current decision R18 Objectionable except if the availability of the publication is restricted to persons who have attained the age of 18 years. Descriptive note Explicit sex scenes Associated documents 78581_18_4_55580.pdf (Register Page) Excisions Recommended and made Registration date 1999-02-08 Language English Country...

Topics: New Zealand, censorship

This is a New Zealand classification of Shipwreck . Title Shipwreck Publication number 9801441 Application number 980100508 Medium Video Recording VHS/PAL Current decision R18 Objectionable except if the availability of the publication is restricted to persons who have attained the age of 18 years. Descriptive note Explicit sex scenes Associated documents 78735_18_4_55649.pdf (Register Page) Registration date 1999-02-23 Language English Country United States Related publications 9801442...

Topics: New Zealand, censorship

From the bitsavers.org collection, a scanned-in computer-related document. components :: opti :: dataSheets :: 82C842 IEEE 1394 PHY 199902

131
131

Aug 26, 2011
08/11

by
Arishima,Takeo 有島,武郎 (1878-1923)

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103
103

Aug 26, 2011
08/11

by
Akutagawa,Ryunosuke 芥川,竜之介 (1892-1927)

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50

Sep 18, 2013
09/13

by
Lorenza Viola; Emanuel Knill; Seth Lloyd

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We propose a novel dynamical method for beating decoherence and dissipation in open quantum systems. We demonstrate the possibility of filtering out the effects of unwanted (not necessarily known) system-environment interactions and show that the noise-suppression procedure can be combined with the capability of retaining control over the effective dynamical evolution of the open quantum system. Implications for quantum information processing are discussed.

Source: http://arxiv.org/abs/quant-ph/9809071v2

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57

Sep 18, 2013
09/13

by
A. Lima-Santos

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The semiclassical limit of the algebraic quantum inverse scattering method is used to solve the theory of the Gaudin model. Via Off-shell Bethe ansatz equations of an integrable representation of the graded osp(1|2) vertex model we find the spectrum of N-1 independent Hamiltonians of Gaudin. Integral representations of the N-point correlators are presented as solutions of the Knizhnik-Zamolodchikov equation. These results are extended for highest representations of the osp(1|2) Gaudin algebra.

Source: http://arxiv.org/abs/solv-int/9809003v2

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144

Jul 20, 2013
07/13

by
C. Gerhardt; A. Fledderjohann; E. Aysal; K. -H. Mütter; J. F. Audet; H. Kröger

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We investigate the critical exponents $\eta_3(\alpha,M), \eta_1(\alpha,M)$ associated with the singularities in the longitudinal and transverse structure factors of the one dimensional antiferromagnetic Heisenberg model with nearest (J_1) and next to nearest (J_2) neighbour coupling of relative strength $\alpha = {J_2}/{J_1}$ and an external field $B$ with magnetization $M(B)$.

Source: http://arxiv.org/abs/cond-mat/9902083v1

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79

Jul 20, 2013
07/13

by
Burkhard Doliwa; Andreas Heuer

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We present new simulation results on a hard sphere system at high densities. Using three-time correlations, we can account for the anomalous diffusion, which results from a homogeneous back-dragging effect. Furthermore, we calculate the non-gaussian parameter and connect it to the existence of dynamic heterogeneities.

Source: http://arxiv.org/abs/cond-mat/9902177v1

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82

Jul 20, 2013
07/13

by
Leonid B. Litinskii

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It turned out that the set of the fixed points is not necessarily the same as the set of the local minima of the energy functional. It depends on the diagonal elements of the connection matrix. The simple method which allows to cut off fictitious fixed points with high energies was found out. Especially the method is effective if the connection matrix is the projection one.

Source: http://arxiv.org/abs/cond-mat/9902123v1

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86

Jul 20, 2013
07/13

by
J. D. Denlinger; G. -H. Gweon; J. W. Allen; C. G. Olson; J. Marcus; C. Schlenker; L. -S. Hsu

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We report the detailed non-Fermi liquid (NFL) lineshape of the dispersing excitation which defines the Fermi surface (FS) for quasi-one-dimensional Li_{0.9}Mo_{6}O_{17}. The properties of Li_{0.9}Mo_{6}O_{17} strongly suggest that the NFL behavior has a purely electronic origin. Relative to the theoretical Luttinger liquid lineshape, we identify significant similarities, but also important differences.

Source: http://arxiv.org/abs/cond-mat/9902061v1

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Jul 20, 2013
07/13

by
Susanna C. Manrubia; Damian H. Zanette

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We study a stochastic multiplicative process with reset events. It is shown that the model develops a stationary power-law probability distribution for the relevant variable, whose exponent depends on the model parameters. Two qualitatively different regimes are observed, corresponding to intermittent and regular behaviour. In the boundary between them, the mean value of the relevant variable is time-independent, and the exponent of the stationary distribution equals -2. The addition of...

Source: http://arxiv.org/abs/cond-mat/9902068v1

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Sep 19, 2013
09/13

by
Christopher J. Fewster; Edward Teo

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Certain exotic phenomena in general relativity, such as backward time travel, appear to require the presence of matter with negative energy. While quantum fields are a possible source of negative energy densities, there are lower bounds - known as quantum inequalities - that constrain their duration and magnitude. In this paper, we derive new quantum inequalities for scalar fields in static space-times, as measured by static observers with a choice of sampling function. Unlike those previously...

Source: http://arxiv.org/abs/gr-qc/9812032v2

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51

Sep 18, 2013
09/13

by
Palash B. Pal; Kamales Kar

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There are well-known bounds on light neutrino masses from cosmological energy density arguments. These arguments assume the neutrinos to be non-degenerate. We show how these bounds are affected if the neutrinos are degenerate. In this case, we obtain correlated bounds between neutrino mass and degeneracy.

Source: http://arxiv.org/abs/hep-ph/9809410v3

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Sep 18, 2013
09/13

by
Hiroyuki Hata; Sanefumi Moriyama

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Recently, it was shown by Jevicki, Kazama and Yoneya (JKY) that the Super-Yang-Mills theories (SYM) in $D\leq 4$ can reproduce the conformal symmetry of the near-horizon geometry of the D-brane solutions. However, the eikonal approximation they used is not sufficient for analyzing the conformal symmetry in SYM. We carry out the 1-loop calculation beyond the eikonal approximation for D=1 SYM (i.e., Matrix model) to confirm the claim of JKY.

Source: http://arxiv.org/abs/hep-th/9901034v2

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Sep 18, 2013
09/13

by
Maximo Banados

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We review some aspects of three-dimensional quantum gravity with emphasis in the `CFT -> Geometry' map that follows from the Brown-Henneaux conformal algebra. The general solution to the classical equations of motion with anti-de Sitter boundary conditions is displayed. This solution is parametrized by two functions which become Virasoro operators after quantisation. A map from the space of states to the space of classical solutions is exhibited. Some recent proposals to understand the...

Source: http://arxiv.org/abs/hep-th/9901148v3

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Jul 20, 2013
07/13

by
Abdulmajeed Abdurrahman; Jose Bordes; Cristobal Lara

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An algebraic proof of the Gluing Theorem at tree level of perturbation theory in String Field Theory is given. Some applications of the theorem to closed string non-polynomial action are briefly discussed

Source: http://arxiv.org/abs/hep-th/9902174v1

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Jul 20, 2013
07/13

by
U. D. J. Gieseler; J. G. Kirk; Y. A. Gallant; A. Achterberg

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In the theory of diffusive acceleration at oblique shock fronts the question of the existence of a discontinuity of energetic particle density is contentious. The resolution of this problem is interesting from a theoretical point of view, and potentially for the interpretation of observations of particle densities at heliospheric shocks and of high-resolution radio observations of the rims of supernova remnants. It can be shown analytically that an isotropic particle distribution at a shock...

Source: http://arxiv.org/abs/astro-ph/9902079v1

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76

Jul 20, 2013
07/13

by
H. Aceves; J. Perea

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The two most common mass estimators that use velocity dispersions and positions of objects in a stellar system, the virial mass estimator (VME) and the projected mass estimator (PME), are revisited and tested using N-body experiments. We consider here only spherical, isolated, and isotropic velocity dispersion systems. We have found that the PME can overestimate masses by ~ 20%, for realistic cluster mass profiles, if applied only to regions around the total system's "effective"...

Source: http://arxiv.org/abs/astro-ph/9902166v1

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84

Jul 20, 2013
07/13

by
Sylvie Vauclair

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While theoretical computations of the lithium abundances in Pop II stars predict variations from star to star, the most recent observations confirm the existence of a "lithium plateau" with no abundance dispersion. This apparent paradox has to be faced and a solution has to be found before deriving the primordial lithium abundance. In any case lithium 7 has been depleted in these stars by at least 20 percent and lithium 6 by at least a factor 2, even in the hottest stars of the...

Source: http://arxiv.org/abs/astro-ph/9902144v1

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Jul 20, 2013
07/13

by
G. P. Korchemsky; G. Sterman

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We study power corrections to the differential thrust, heavy mass and related event shape distributions in $e^+e^-$-annihilation, whose values, $e$, are proportional to jet masses in the two-jet limit, $e\to 0$. The factorization properties of these differential distributions imply that they may be written as convolutions of nonperturbative "shape" functions, describing the emission of soft quanta by the jets, and resummed perturbative cross sections. The infrared shape functions are...

Source: http://arxiv.org/abs/hep-ph/9902341v1

Topic: The Times News (Idaho Newspaper)

Crystals grown from liquid solutions have important industrial applications. Zeolites, for instance, a class of crystalline aluminosilicate materials, form the backbone of the chemical process industry worldwide, as they are used as adsorbents and catalysts. Many of the phenomena associated with crystal growth processes are not well understood due to complex microscopic and macroscopic interactions. Microgravity could help elucidate these phenomena and allow the control of defect locations,...

Topics: NASA Technical Reports Server (NTRS), MATHEMATICAL MODELS, CRYSTAL GROWTH, ZEOLITES, MICROGRAVITY,...

GDRSD School Committee - 1999 - 02/10

Topics: School Committee, GDRSD

An important task for scouting robots in open terrain is the planning of route to a prescribed destination with the help of digital maps. In an open environment, available terrain maps usually will be too large for a timely analysis of a whole map and may cover areas that are not relevant for route planning. One needs, therefore, route-planning procedures that use partial terrain maps. This report presents two such procedures that use sets of partial maps. A first method uses a series of...

Topics: DTIC Archive, Celmins, Aivars, ARMY RESEARCH LAB ADELPHI MD, *BATTLEFIELDS, *ROBOTS, *TERRAIN,...