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CONTENTS VOLUME 5, issue 1 |
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| O.N. Karavashkina.and S.B. Karavashkin SOME ASPECTS OF THE EARTH EVOLUTION. CHAPTER 2. HYPOTHESIS OF ORIGIN OF PLANETARY SYSTEM (PART II) |
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Published on 27.01.2005 |
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In this portion of work we study, which part the dynamic electric field takes in formation of galactic structures in the course of their evolution. We show definitive effect of this field on substance concentration in galactic spiral arms as the medium of star formation and the part of dynamic electric field of the star itself in the star's structure and evolution. In this portion of Chapter 2 we also consider chemical evolution of stars and show nucleosynthesis to be not confined to the stage of iron synthesis, but progressing up to those chemical elements which are able to remain stable under conditions in the particular star. Keywords: cosmogony, cosmology, electric field of young star, formation of magnetic field of star, formation of the star structure, mechanism of star rotation, mechanism of infra-low-frequency oscillations in the star. Classification by PASC 2001: 97.10.Bt, 97.10.Cv, 97.10.Fy, 97.10.Kc, 97.10.Ld, 98.35.Ac, 98.35.Df, 98.35.Eg. |
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2.5. Dynamic electric field of galaxy and its part in the galaxy structure and evolution English Full text: / 1 / 2 / 3 / 4 / 5 / 6 / Russian Full text: / 1 / 2 / 3 / 4 / 5 / 6 / 2.6. Secondary star formation in the view of galactic dynamic electric field affectionEnglish Full text: / 7 / 8 / 9 / 10 / 11 / Russian Full text: / 7 / 8 / 9 / 10 / 11 / 2.7. Chemical evolution of star |
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| O.N. Karavashkina.and S.B. Karavashkin ON LONGITUDINAL EXCITATION OF ELASTIC MEDIUM HAVING A MOVING BOUNDARY |
Published on 06.02.2005 |
In these notes we are studying two most typical models of a wide class of problems on longitudinal excitation propagating in an ideal elastic medium having a moving ideally reflecting boundary. These problems have most broad area of applications, from mechanics to fundamentals of Relativity and electromagnetism. We showed that in both models the pattern of oscillations is described by progressive waves modulated in amplitude. With it, in case of stationary source and moving boundary, the wave propagation velocity is proportional to the speed of boundary motion, and in case of synchronous shift of the source and boundary, the conditions of modulation essentially depend on the shift velocity. Besides, we present the technique to transmit non-distorted measures of space and time between mutually moving reference systems. Keywords: physics, dynamics of elastic systems, oscillations in elastic media with a moving boundary, techniques to transmit the spatial and temporal measures between mutually moving reference frames Classification by MSC 2000: 30E25; 70G60; 70J35; 70J50; 74H45; 74J05 Classification by PASC 2001: 02.60.Lj; 06.30.Ft; 06.60.Sx; 46.25.Cc; 46.40.-f; 46.40.Cd: |
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| Dyna P. Karavashkina .and S.B. Karavashkin PHENOMENA AT ELECTRIC CONTACTS BREAKING DIRECT-CURRENT INDUCTIVE LOADS |
Published on 08.03.2005 |
This paper is devoted to theoretical and experimental study of physical nature of unstable discharges arising in contact gaps when opening inductive load. We revealed that despite conventional opinion, showering arcs are alternating relaxations. Each of them consists of two stages: monotonous exponential growth of voltage related to the charging of parasitic capacitance of gap which is shunted by metallic bridges, and of high-frequency high-voltage oscillation process related to the high-frequency spark process within the gap. With it, metallic bridges are produced in each period of unstable discharges. We analyse the conditions and stipulate the physics of processes of such bridges formation. We established that the cause of bridge formation is the electric pressure in high-voltage oscillation process preceding the monotonous period of unstable discharge. The second cause are plasma jets able to strap even larger gaps than those typical for unstable discharges. The experimental results obtained after this theoretical study fully corroborated the described pattern of physical processes in showering arcs. On the basis of developed method to obtain the dynamic curve of breakdown voltage and noting the experimentally corroborated physics of processes, we have successfully carried out the work on practical protection of relay contacts working under inductive load, and presented the result of this protection. Keywords: contacts opening inductive load, short arcs, unstable discharge, showering discharge, multiple metallic bridges, contact protection from erosion Classification by PASC 2001: 52.80.Mg; 52.80.Pi; 52.80.Tn |
1. Introduction English Full text: / 23 / 24 / 25 / 26 / 27 / Russian Full text: / 23 / 24 / 25 / 26 / 27 / 2. Experimental and theoretical study of process at the contacts opening inductive loadEnglish Full text: / 28 / 29 / 30 / 31 / 32 / Russian Full text: / 28 / 29 / 30 / 31 / 32 / 3. Analysis of improved model of showering arcEnglish Full text: / 33 / 34 / 35 / Russian Full text: / 33 / 34 / 35 / 4. Theoretical and experimental substantiation of multiple producing and breakage of metallic bridges in an opening contact gapEnglish Full text: / 36 / 37 / Russian Full text: / 36 / 37 / 5. Physical processes promoting metallic bridge formationEnglish Full text: / 38 / 39 / 40 / Russian Full text: / 38 / 39 / 40 / 6. Classification of metallic bridges and their part in mass transferEnglish Full text: / 41 / 42 / Russian Full text: / 41 / 42 / 7. Area of scientific and practical use of the discovery, ConclusionsEnglish Full text: / 43 / 44 / Russian Full text: / 43 / 44 / ReferencesEnglish Full text: / 45 / Russian Full text: / 45 / |
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