### 171461 results

Contributors: Juan José Hernández, Sergio Navas

Date: 2019-12-05

... Abstract This program computes the discovery and exclusion limits that can be set in prospective studies of new experiments in the search for new phenomena. It properly takes into account the different outcomes that the experiment can obtain including the possible signal and background fluctuations. The procedure gives in general more conservative limits than those obtained assuming that the experiment will obtain a number of events equal to the expected mean. The difference may be essential in those ... Title of program: JASP Catalogue Id: ADES_v1_0 Nature of problem Estimation of discovery and exclusion limits in prospective studies using Poisson statistics and properly including the experimental fluctuations. Versions of this program held in the CPC repository in Mendeley Data ADES_v1_0; JASP; 10.1016/S0010-4655(96)00133-6 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: Thomas Müller

Date: 2019-12-05

... Abstract The optical appearance of objects moving close to the speed of light or orbiting a black hole is of interest for educational purposes as well as for scientific modeling in special and general relativity. The standard approach to visualize such settings is ray tracing in four-dimensional spacetimes where the direction of the physical propagation of light is reversed. GeoViS implements this ray tracing principle making use of the Motion4D library that handles the spacetime metrics, the integrat... Title of program: GeoViS Catalogue Id: AESY_v1_0 Nature of problem First-person visualization of four-dimensional spacetimes in the theory of relativity. Versions of this program held in the CPC repository in Mendeley Data AESY_v1_0; GeoViS; 10.1016/j.cpc.2014.04.013 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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Contributors: R. Portugal

Date: 2019-12-05

... Abstract This paper describes a new package for abstract tensor calculation. Riegeom can efficiently simplify generic tensor expressions written in the indicial format. It addresses the problem of the cyclic symmetry and the dimension dependent relations of Riemann tensor polynomials. There are tools to manipulate tensors such as substitution and symmetrization functions. The main tensors of the Riemannian geometry have been implemented. The underlying algorithms are based on a precise mathematical fo... Title of program: Riegeom Catalogue Id: ADLM_v1_0 Nature of problem Simplification of tensor expressions and tensor manipulation in the indicial format. Useful for calculations in General Relativity and Riemannian Geometry. Versions of this program held in the CPC repository in Mendeley Data ADLM_v1_0; Riegeom; 10.1016/S0010-4655(99)00480-4 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: G.A. Evangelakis, J.P. Rizos, I.E. Lagaris, I.N. Demetropoulos

Date: 2019-12-05

... Title of program: MERLIN Catalogue Id: AAXW_v1_0 Nature of problem A lot of problems in physics, chemistry, applied mathematics as well as in engineering and in other fields, are quite often reduced to minimizing a function of several variables. MERLIN is a system designed to minimize a multidimensional function. Versions of this program held in the CPC repository in Mendeley Data AAXW_v1_0; MERLIN; 10.1016/0010-4655(87)90094-4 AAXW_v2_0; MERLIN-2.0 PROGRAMMABLE; 10.1016/0010-4655(89)90007-6 AAXW_v3_0; MERLIN-3.0; 10.1016/S0010-4655(98)00005-8 AAXW_v4_0; MERLIN-3.1.1; 10.1016/j.cpc.2003.12.005 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: Robert Fleischhaker, Jörg Evers

Date: 2019-12-05

... Abstract The msprop program presented in this work is capable of solving the Maxwell–Schrödinger equations for one or several laser fields propagating through a medium of quantum optical few-level systems in one spatial dimension and in time. In particular, it allows to numerically treat systems in which a laser field interacts with the medium with both its electric and magnetic component at the same time. The internal dynamics of the few-level system is modeled by a quantum optical master equation wh... Title of program: msprop Catalogue Id: AEHR_v1_0 Nature of problem We consider a system of quantum optical few-level atoms exposed to several near-resonant continuous-wave or pulsed laser fields. The complexity of the problem arises from the combination of the coherent and incoherent time evolution of the atoms and its dependence on the spatially varying fields. In systems with a coupling to the electric and magnetic field component the simultaneous treatment of both field components poses an additional challenge. Studying the system dynamics requires solving t ... Versions of this program held in the CPC repository in Mendeley Data AEHR_v1_0; msprop; 10.1016/j.cpc.2010.10.018 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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Contributors: D.F. Fang, J.F. Shriner

Date: 2019-12-05

... Abstract A computer program COEFF is described which calculates angular-momentum coupling coefficients and expresses them as a quotient of two integers multiplied by the square root of the quotient of two integers. This is accomplished by using a representation in which an integer number is converted into an array of prime factors and by redefining the basic arithmetic functions to manipulate these arrays. The program provides the capability of calculating coupling coefficients for large angular momen... Title of program: COEFF Catalogue Id: ACGY_v1_0 Nature of problem Values for angular momentum coupling coefficients are required for a variety of physical situations. Versions of this program held in the CPC repository in Mendeley Data ACGY_v1_0; COEFF; 10.1016/0010-4655(92)90097-I This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: F. Beleznay

Date: 2019-12-05

... Title of program: SCHROD Catalogue Id: ACQZ_v1_0 Nature of problem The subroutine SCHR solves the radial Schrodinger equation using a logarithmic mesh without transforming the independent variable. It is applicable in problems where a smooth expansion of the scale near the origin is advantageous. Versions of this program held in the CPC repository in Mendeley Data ACQZ_v1_0; SCHROD; 10.1016/0010-4655(72)90082-3 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: James W. Eastwood

Date: 2019-12-05

... Abstract ORTHOVEC is a collection of REDUCE procedures and operations which provide a simple to use environment for the manipulation of scalars and vectors. Operations include addition, subtraction, dot and cross products, division, modulus, div, grad, curl, Laplacian, differentiation, integration, a · ▽ and Taylor expansion. Title of program: ORTHOVEC Catalogue Id: AAXY_v1_0 Nature of problem There is a wide range using vector calculus in orthogonal curvilinear coordinates and vector integration, differentiation and series expansion. Versions of this program held in the CPC repository in Mendeley Data AAXY_v1_0; ORTHOVEC; 10.1016/0010-4655(87)90073-7 AAXY_v2_0; ORTHOVEC; 10.1016/0010-4655(91)90054-O This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: Richard L. Smith, Donald G. Truhlar

Date: 2019-12-05

... Title of program: NETI Catalogue Id: AAGP_v1_0 Nature of problem The problem of electron scattering from atoms and other quantum mechanical scattering problems can be solved using algebraic variational methods. ... CORRECTION SUMMARY: Vol:Year:Page 8:1974:333 "000ACORRECTION 19/07/74" "Program for evaluation of non-exchange type integrals required in electron-atom scattering theory using Slater-type orbitals as basis functions. (C.P.C. 5(1973)80)." R.L. Smith; D.G. Truhlar ADAPTATION SUMMARY: Vol:Year:Page 9:1975:327 "0001 NETI/ETI" "Continuum exchange integrals for algebraic variational calculations of electron-atom scattering using Slater-type orbitals as basis functions." J. Abdallah Jr.; D.G. Truhlar Note: adaptation instructions are contained in source code Note: correction instructions are contained in source code Versions of this program held in the CPC repository in Mendeley Data AAGP_v1_0; NETI; 10.1016/0010-4655(73)90014-3 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: César Tablero Crespo, Alfredo Aguado, Miguel Paniagua

Date: 2019-12-05

... Abstract Global potential energy surfaces (GPES) for tetratomic molecular systems, containing at least one group of two identical nuclei, which fit ab initio data can be obtained preserving the accuracy of the ab initio points. The permutational symmetry of the potential, corresponding to the two identical nuclei, is treated analytically in this new version of the previous published program GFIT4C (Computer Physics Communications catalogue number: ADNB). The global fit obtained fulfills the stringent ... Title of program: GFIT4C-2 Catalogue Id: ADOV_v1_0 Nature of problem Given a set of ab initio points of a molecular system with N atoms, the problem is to obtain a golbal analytical (3N - 6)-dimensional representation of the corresponding adiabatic potential having all the symmetry properties of the system and satisfying the stringent criteria [1] needed in molecular dynamical calculations. In Part II.1 [4] of this series we have dealt with the tetratomic system class ABCD and six-dimensional (6D) representation (program GFIT4C). In the present Part II.2 we treat ... Versions of this program held in the CPC repository in Mendeley Data ADOV_v1_0; GFIT4C-2; 10.1016/S0010-4655(01)00289-2 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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