Summary The recently solved linear-isotropic elasticity problem of the interaction between an edge dislocation and an elliptical inhomogeneity is extended to the case in which the matrix is subjected to a shear stress...
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Summary The recently solved linear-isotropic elasticity problem of the interaction between an edge dislocation and an elliptical inhomogeneity is extended to the case in which the matrix is subjected to a shear stress applied at infinity. The resolutive tool is obtained by means of a slight modification of an already available computer program. Numerical results show the existence of atrapping height y t for a sufficiently elongated inhomogeneity, such that dislocations aty t are totally trapped. The consequences on the creep of dispersion-strengthened metals (Holbrook and Nix’s model), as well as the dependence of trapping on shape, material constants, applied stress, and orientation, are discussed.
The constructive meaning of mathematical propositions makes it possible to identify specifications for computer programs with propositions. In Martin-Löf's type theory, constructing a program satisfying a spe...
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The constructive meaning of mathematical propositions makes it possible to identify specifications for computer programs with propositions. In Martin-Löf's type theory, constructing a program satisfying a specification corresponds to proving the proposition expressing the specification. These ideas are explained and some examples of specifications are given.
The characteristics of the silicon carbide blocks of surge arresters are time-dependent because of the inductance and negative temperature coefficient of the silicon carbide. A simple but realistic model to express th...
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The characteristics of the silicon carbide blocks of surge arresters are time-dependent because of the inductance and negative temperature coefficient of the silicon carbide. A simple but realistic model to express these characteristics is proposed. The model, developed from routine test results, represents the decay in discharge voltage as time-dependent instead of separating it into inductive and heating effects. Using this model, the effect of a lightning stroke to a gas-insulated substation, under various conditions, is analysed by a computer program to show that the method adopted to represent the block characteristics has an effect on the calculated overvoltages.
Using the symmetry relations of the complex probability function (CPF), the algorithm developed by Humlíček (1979) to compute this function over the upper half plane can be extended to cover the entire complex pl...
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Using the symmetry relations of the complex probability function (CPF), the algorithm developed by Humlíček (1979) to compute this function over the upper half plane can be extended to cover the entire complex plane. Using the Humlíček algorithm the real and imaginary components of the CPF can be computed over the whole complex plane. Because of the relation between the CPF and other interesting mathematical functions, fast and accurate computer programs can be written to compute them. Such functions include the derivatives of the CPF, the complex error function, the complex Fresnel integrals, and the complex Dawson's functions. Fortran implementations of these functions are included in the Appendix.
In this paper, the various diffraction phenomena encountered in problems treating the interaction of the electromagnetic field radiated by an antenna mounted on a vehicle with the nearby structures are analysed and a ...
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In this paper, the various diffraction phenomena encountered in problems treating the interaction of the electromagnetic field radiated by an antenna mounted on a vehicle with the nearby structures are analysed and a classification of their order of magnitude is given with the aim of conceiving electromagnetic models. The rays which have been selected for the construction of three models intended for computation of antenna radiation pattern deformations and coupling effects between antennas are specified and the general organization of the computer program associated to these models is given.
Summary An alternative derivation of the elastic-plastic strain decomposition recently introduced by Lee is discussed. References to papers in which this decomposition has been effectively utilized in working out a ge...
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Summary An alternative derivation of the elastic-plastic strain decomposition recently introduced by Lee is discussed. References to papers in which this decomposition has been effectively utilized in working out a general computer program are given.
This paper described in general a computer model for simulation of steady-state performance of a split, residential, air-to-air heat pump. Organization of the model is discussed and approach to modelling of main heat ...
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The implausibility of random sampling assumption in experimental teratology is pointed out. It is emphasized that nonstatistical inference remains a standard scientific approach, in spite of widespread use of many sta...
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A computer program in BASIC computer language for use in storing and comparing the components of various biological culture media is described. The program contains 11 operations that deal with manipulation of data re...
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The computer is idcally suited for storing and retrieving a large volume of medical data. Described herein is a computer program written for the managemenr of data from patients who have had urodynamic evaluation. The...
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