Showing papers in "Computer Physics Communications in 1978"
TL;DR: The introduction of null events removes the need for much complicated algebra, leads to a more efficient simulation and reduces the likelihood of logical error.
63 citations
TL;DR: NearFar program is a Java code for decomposing heavy-ion elastic scattering amplitude. It contains graphical display interface and can be used to calculate theoretical values of quantities to be decomposed.
Abstract: The NearFar program is a package for carrying out an interactive nearside–farside decomposition of heavy-ion elastic scattering amplitude. The program is implemented in Java to perform numerical operations on the nearside and farside angular distributions. It contains a graphical display interface for the numerical results. A test run has been applied to the elastic O16+Si28 scattering at Elab=1503MeV.Title of program: NearFarCatalogue identifier: ADYP_v1_0Program summary URL: http://cpc.cs.qub.ac.uk/summaries/ADYP_v1_0Program obtainable from: CPC Program Library, Queen's University of Belfast, N. IrelandLicensing provisions: noneComputers: designed for any machine capable of running Java, developed on PC-Pentium-4Operating systems under which the program has been tested: Microsoft Windows XP (Home Edition)Program language used: JavaNumber of bits in a word: 64Memory required to execute with typical data: case dependentNo. of lines in distributed program, including test data, etc.: 3484Number of bytes distributed program, including test data, etc.: 142 051Distribution format: tar.gzOther software required: A Java runtime interpreter, or the Java Development Kit, version 5.0Nature of physical problem: Interactive nearside–farside decomposition of heavy-ion elastic scattering amplitude.Method of solution: The user must supply a external data file or PPSM parameters which calculates theoretical values of the quantities to be decomposed.Typical running time: Problem dependent. In a test run, it is about 35 s on a 2.40 GHz Intel P4-processor machine.
38 citations
31 citations
17 citations
TL;DR: In this paper, a simple method is described for searching for the optical-model parameters that produce best fits to elastic-scattering cross sections in the case where the elastic channel is coupled to other reaction channels.
14 citations
TL;DR: In this paper, the reduction of spatial grid effects in plasma simulations has been studied numerically using higher order multipole expansions and the spline method in one dimension, while keeping the higher order moments such as quadrupole and octopole moments substantially reduces the grid effects, quadratic and cubic splines in general have better stability properties for numerical plasma simulations when the Debye length is much smaller than the grid size.
11 citations
TL;DR: Some conceptually simple tests of pseudo-random number generators are discussed, including well known methods like the χ2, Kolmogorov-Smirnov and sign tests.
11 citations
TL;DR: In this paper, the matrix elements of non-scalar products of two irreducible double tensorial sets of operators, of any order, between arbitrarily L-S coupled, N -electron configurations are expressed as product of two recoupling coefficients and one-particle reduced matrix elements.
11 citations
TL;DR: In this article, a method to accurately compute vacuum polarization to fourth-order in both the space-like and the time-like regions is described, which makes use of various techniques, including changes of variables and Pade approximants to accelerate convergence of sequences which occur in the computation.
TL;DR: In this article, the authors present numerical methods for the analysis of experimental data of line, differential and surface probes, where the integral equations for all the probes are assembled and approximated by one vector equation with matrix elements depending on the kind of probe.
TL;DR: A discussion of the present situation on the calculation of the energy straggling of heavy charged particles in relatively thin absorbers is given in this paper, where a guide for the regions of validity of the Vavilov formula is given; and a warning concerning the use of the computer program STRAGL is noted.
TL;DR: The SEURBNUK-2 fluid flow code developed by JRC Ispra and AWRE Aldermaston for use in containment analysis for fast reactor safety studies is described in this article.
TL;DR: In this paper, a method of characteristics for the computation of inviscid one-dimensional unsteady non-equilibrium flows is presented, where the rate equations, being stiff, are treated by exponential fitting following Liniger and Willoughby.
TL;DR: The electrical conductivity process in non-crystalline systems in a high electric field has been studied by the computer simulation method and the field dependencies of these systems have been examined for several temperatures.
TL;DR: Criteria for developing a resource sharing real time system is given and some relevant measures to insure reliability and maintainability of the system are discussed.
TL;DR: The design of a display subroutine library is described, with an example, and graphic dialogue software is considered primarily from the point of view of the programmer who uses a high-level language.
TL;DR: In this paper, a numerical method to compute the amplitudes of Feynman diagrams is described, and an example of the polarization of the lepton in the di-lepton production by a polarized photon is given.
TL;DR: In this article, an attempt has been made to obtain satisfactory simulation estimates of the equilibrium critical properties of the three-dimensional Ising system using a comparatively small group of spin 1 2 particles set on a simple cubic lattice.
TL;DR: The significance of the microprocessor in laboratory automation is discussed, and it is shown that it is not simply a cheap replacement of the minicomputer.
TL;DR: The program SCHOONSCHIP as mentioned in this paper was used to evaluate fermion expectation values in quantum chemistry, and some remarks made from experiences with the program were made from experience with the SchoonsCHIP program.
TL;DR: In this article, it was shown that an integral equation can also be constructed by using a particular solution of the Laplace equation as the Kernel of the integral equation, which is the case in this paper.
TL;DR: In this paper, the role of on-line computers in radio astronomy observations both for data analysis and instrument control is described, both for radio astronomy data and for data acquisition and control.