Showing papers by "University of Maribor published in 1987"
01 Jan 1987
TL;DR: The mass thickness of a large area surface corrosion deposit which could be easily detected through thick (1 - 2 cm) Al slabs was found to be at least 0.02 g/cm2 as mentioned in this paper.
Abstract: Within a feasibility study concerning the introduction of neutron radiography as a nondestructive method into the domestic aircraft industry and for the maintenance of domestic commercial civil aircraft, the sensitivity of neutron radiography for detection of A1 corrosion products was studied experimentally. The mass thickness of a large area surface corrosion deposit which could be easily detected through thick (1 – 2 cm) Al slabs was found to be at least 0.02 g/cm2. The minimal detectable mass thickness of corrosion products depends on the relative amount of A1(0H)3 and A10(0H), moisture and possible organic materials in their composition and should be in the range of 0.01 – 0.02 g/cm2.
8 citations
6 citations
TL;DR: The model of rapid orientational fluctuations of the molecular long axis in liquid crystals, based upon the solution of the one-dimensional problem of the random walk of a particle between two perfectly reflecting barriers, is suggested and in conjunction with the translational diffusion, utilized for the evaluation of the incoherent scattering function, as well as EISF, appropriate to smectic A and nematic phases, and the comparison with measurements is made as discussed by the authors.
Abstract: The model of rapid orientational fluctuations of the molecular long axis in liquid crystals, based upon the solution of the one-dimensional problem of the random walk of a particle between two perfectly reflecting barriers, is suggested and in conjunction with the translational diffusion of the molecular centre of mass and also uniaxial rotational diffusion, utilized for the evaluation of the incoherent scattering function, as well as EISF, appropriate to smectic A and nematic phases, and the comparison with measurements is made. On the basis of published measurements it is concluded that the molecules in the smectic A phase of DTBBA are subject to long axis orientational fluctuations between two potential barriers with an apex angle of about 100°.
5 citations
TL;DR: A computerized tutor which helps in the teaching of JSP is introduced, which supports all aspects of development in JSP in a "step-by-step" mode for laymen and a "normal" modes for the advanced user.
Abstract: In the article we briefly discuss the Jackson Structured Programming method and compare this method with the conventional approach to programming. Then we introduce a computerized tutor which helps in the teaching of JSP. The tutor supports all aspects of development in JSP in a "step-by-step" mode for laymen and a "normal" mode for the advanced user. It runs on the Graphic Partner computer under CPM or on the IBM Personal Computer under MS-DOS.
4 citations
TL;DR: The thermal behavior of hydrazinium(2 + ) heptafluorotantalate monohydrate has not previously been reported, and therefore it was chosen as the subject of a study using TG, DTG and DTA measurements as mentioned in this paper.
3 citations
01 Jan 1987
TL;DR: In this article, a system of coupled CH3-type torsional oscillators embedded in a crystal field of definite symmetry and interacting with an externally applied d.c. magnetic field is considered.
Abstract: A system of coupled CH3-type torsional oscillators embedded in a crystal field of definite symmetry and interacting with an externally applied d.c. magnetic field is considered. Interaction among the neighboring CH3 groups is assumed to be the result of electrostatic interaction of the respective charge distributions. To obtain an approximate but nevertheless reasonably accurate description of the lowest lying energy eigenstates we examine the minima of the potential energy of the system. Next we construct Gaussian wave packets peaked at each of these minima and form linear superpositions in order to respect the symmetries of the problem under consideration.