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Oct 23, 2017
10/17

by
Government of Goa

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The Goa Gazette Published by the Government Printing Press Government of Goa Published By Authority Gazette Number: 0809-50 Gazette Date: 2009-03-16 Gazette Series: SI Gazette Type: OG - Ordinary Gazette - Extraordinary Gazette Gazette No: 1 Official Details Link

Topic: Goa Gazette

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37

Sep 23, 2013
09/13

by
Tomoko Mizuguchi; Takashi Odagaki

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A simple monatomic system in two dimensions with a double-well interaction potential is investigated in a wide range of temperature by molecular dynamics simulation. The system is melted and equilibrated well above the melting temperature, and then it is quenched to a temperature 88% below the melting temperature Tm at several cooling rates to produce an amorphous state. Various thermodynamic quantities are measured as a function of temperature while the system is heated at a constant rate. The...

Source: http://arxiv.org/abs/0903.2728v1

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25

Sep 23, 2013
09/13

by
Paul Kessenich

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Global existence for a system of nonlinear partial differential equations (PDE) modeling an isotropic incompressible viscoelastic material is proved. The structure of the PDE is derived through constitutive assumptions on the material. Restriction on the size of the initial displacement and velocity for the model is specified independent of the size of the viscosity of the material. The proof of global existence combines use of vector fields, local energy decay estimates, generalized Sobolev...

Source: http://arxiv.org/abs/0903.2824v1

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42

Sep 23, 2013
09/13

by
Iskren Y. Georgiev; Michael Hilker; Thomas H. Puzia; Paul Goudfrooij; Holger Baumgardt

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(Abridged) Using luminosities and structural parameters of globular clusters (GCs) in the nuclear regions (nGCs) of low-mass dwarf galaxies from HST/ACS imaging we derive the present-day escape velocities (v_esc) of stellar ejecta to reach the cluster tidal radius and compare them with those of Galactic GCs with extended (hot) horizontal branches (EHBs-GCs). For EHB-GCs, we find a correlation between the present-day v_esc and their metallicity as well as (V-I)_0 colour. The similar v_esc,...

Source: http://arxiv.org/abs/0903.2857v1

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49

Sep 23, 2013
09/13

by
Najib Mahdou; Mohammed Tamekkante; Siamak Yassemi

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We compute the Gorenstein weak dimension of a coherent power series rings over a commutative rings and we show that, in general, $\gwd(R) \leq 1$ does not imply that $R$ is an arithmetical ring.

Source: http://arxiv.org/abs/0903.2779v1

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43

Sep 21, 2013
09/13

by
A. K. Kwasniewski

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The way to arrive at formula of zeta matrix for any graded posets with the finite set of minimal elements is delivered following the first reference. This is being achieved via adjacency and zeta matrix description of bipartite digraphs chains, the representatives of graded posets. The bipartite digraphs elements of such chains amalgamate to form corresponding cover relation graded poset digraphs with corresponding adjacency matrices being amalgamated throughout natural join as special adequate...

Source: http://arxiv.org/abs/0901.0155v2

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Sep 23, 2013
09/13

by
Andrew V. Knyazev; Klaus Neymeyr

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Preconditioned eigenvalue solvers (eigensolvers) are gaining popularity, but their convergence theory remains sparse and complex. We consider the simplest preconditioned eigensolver--the gradient iterative method with a fixed step size--for symmetric generalized eigenvalue problems, where we use the gradient of the Rayleigh quotient as an optimization direction. A sharp convergence rate bound for this method has been obtained in 2001--2003. It still remains the only known such bound for any of...

Source: http://arxiv.org/abs/0801.3099v3

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Sep 22, 2013
09/13

by
Evgeny Epelbaum; Hermann Krebs; Dean Lee; Ulf-G. Meißner

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We present lattice calculations for the ground state energy of dilute neutron matter at next-to-leading order in chiral effective field theory. This study follows a series of recent papers on low-energy nuclear physics using chiral effective field theory on the lattice. In this work we introduce an improved spin- and isospin-projected leading-order action which allows for a perturbative treatment of corrections at next-to-leading order and smaller estimated errors. Using auxiliary fields and...

Source: http://arxiv.org/abs/0812.3653v2

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Sep 23, 2013
09/13

by
Martin Lorenz

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We develop the theory of rational ideals for arbitrary associative algebras R without assuming the standard finiteness conditions, noetherianness or the Goldie property. The Amitsur-Martindale ring of quotients replaces the classical ring of quotients which underlies the previous definition of rational ideals but is not available in a general setting. Our main result concerns rational actions of an affine algebraic group G on R. Working over an algebraically closed base field, we prove an...

Source: http://arxiv.org/abs/0801.3472v3

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Sep 23, 2013
09/13

by
Catalin D. Spataru; Mark S. Hybertsen; Steven G. Louie; Andrew J. Millis

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The Anderson model for a single impurity coupled to two leads is studied using the $GW$ approximation in the strong electron-electron interaction regime as a function of the alignment of the impurity level relative to the chemical potentials in the leads. We employ a non-equilibrium Green's function technique to calculate the electron self-energy, the spin density and the current as a function of bias across the junction. In addition we develop an expression for the change in the expectation...

Source: http://arxiv.org/abs/0903.2683v1