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Article
Mathematical Modeling of Gas Effusion into a Vacuum
The effusion of gas through a small rectangular opening into a vacuum is studied using methods of mathematical modeling. The distribution functions of gas particles flowing out of an opening and the moments of...
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Article
Flat-Probe Diagnostic Methods for Collisional Plasma Flowing from Technological Plasmatrons
Based on computational and full-scale experiments, several algorithms have been developed for processing current–voltage curves obtained for flat wall and remote probes in the case of a weakly ionized low-temp...
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Article
Use of the Bohm’s formula and its analogues in probe diagnostics
Simple algorithms are developed to proceed the probe characteristics in a number of limiting regimes when the characteristic probe size, r p, is relatively large (r ...
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Article
Flat wall probe in dense plasma flow
A model is developed of a flat wall probe, accounting for all the transition processes: convective motion, diffusion, and mobility. Computer modeling is performed and the current distributions over the probe s...
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Article
Current–voltage characteristics of a flat probe in a rarified plasma flow
Mathematical and numerical models of a collision-free plasma flow about the flat probe are developed. The current–voltage characteristics of flat probes located along and transverse across the flow, as well as...
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Article
Change of biological activity of soils under the influence of ameliorative loosening
Ameliorative loosening of soils improved its water-air and food regimes and intensified aerobic microorganisms with the increased levels of energetic activity. The number of aerobic cellulose decomposing bacte...
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Article
Bioindication monitoring of the state of fallow lands
Microbiological testing (bioindication) of fallow lands of ameliorative objects in the humid zone has been carried out. It is shown that soils of plots with an unsatisfactory water and air regime are character...
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Article
Synthesis and thermal properties of polyamide 6 (A)-polyimide (B) block copolymers of ABA type
Polyimides (PI) having different molecular weights were prepared by condensation of oxydiphthalic anhydride with 9,9-bis-(4-aminophenyl)fluorene in nitrobenzene solution at 180°C. These polyimides carried two ...
