Autor: Bondarev, I. V. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Anisotropic Magnetic Quenching of Positronium Formed by Polarized Positrons in Oriented Crystals
Autorzy:: Bondarev, I. V.
Powiązania:: https://bibliotekanauki.pl/articles/2007885.pdf
Data publikacji:: 1999-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.70.Bj
71.60.+z
36.10.Dr
Opis:: A theoretical analysis is performed of the phenomenon of anisotropic magnetic quenching of a positronium atom formed by polarized positrons in noncubic crystals oriented with respect to an external magnetic field. An initial polarization of positrons is shown to enhance an anisotropy of Ps magnetic quenching and to decrease the strength of magnetic field in which an anisotropy is maximal. A maximal anisotropic effect has been estimated for quasi-Ps in crystalline quartz and Ps complex in naphthalene single crystal.
Źródło:: Acta Physica Polonica A; 1999, 95, 4; 455-460
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Analysis of Possible Scattering Processes for Bloch Positronium in Ionic Crystals at Elevated Temperatures
Autorzy:: Bondarev, I. V.
Powiązania:: https://bibliotekanauki.pl/articles/2024215.pdf
Data publikacji:: 2001
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.70.Bj
71.60.+z
71.38.+i
36.10.Dr
Opis:: The role of nonpolar optic phonon scattering and of umklapp acoustic phonon scattering is analyzed for a delocalized positronium atom in ionic crystals at elevated temperatures. At temperatures above which they become essential both of these scattering mechanisms contribute to the imaginary self-energy of positronium renormalizing its acoustic deformation potential constant. It was such a renormalization that was recently observed experimentally for delocalized positronium in MgF$\text{}_{2}$ crystal. We put forward the theoretical explanation of these experiments based upon the model of nonpolar optic phonon scattering of positronium. An effect analogous to that observed in MgF$\text{}_{2}$ is predicted for crystalline quartz above the temperature of (α-β)-phase transition.
Źródło:: Acta Physica Polonica A; 2001, 99, 3-4; 337-343
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Sensitivity of Positronium Momentum Distribution to Phase Transitions in Crystalline Dielectrics
Autorzy:: Bondarev, I. V.
Hyodo, T.
Powiązania:: https://bibliotekanauki.pl/articles/2042201.pdf
Data publikacji:: 2005-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.70.Bj
71.60.+z
71.38.-k
36.10.Dr
Opis:: We give a review of recent theoretical and experimental study of the positronium-phonon and positronium-quadrupole interactions in dielectric crystals of different local symmetries, placing a special emphasis on the sensitivity of the positronium momentum distribution to the second order phase transitions in crystalline dielectrics.
Źródło:: Acta Physica Polonica A; 2005, 107, 4; 673-684
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Quadrupole Interactions and Anisotropic Magnetic Quenching of Positronium in Oriented Crystals
Autorzy:: Bondarev, I. V.
Kuten, S. A.
Powiązania:: https://bibliotekanauki.pl/articles/1933475.pdf
Data publikacji:: 1995-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.60.+z
78.70.Βj
36.10.Dr
31.30.Gs
Opis:: The quadrupole interaction of positronium in noncubic defectless crystals has been investigated theoretically. It is shown to lead to the weak anisotropy of positronium magnetic quenching. The temperature dependence of the quadrupole coupling constant and the estimations of the magnitude of the anisotropy are obtained for delocalized positronium in crystalline quartz. The significant magnitude of the anisotropy is predicted for "anomalous" positronium in oriented crystalline polymeric structures.
Źródło:: Acta Physica Polonica A; 1995, 88, 1; 83-90
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Operational control of marine catastrophes based on competitive computing technologies
Autorzy:: Bondarev, V. A.
Nechaev, Yu. I.
Kovalishin, P. Yu.
Powiązania:: https://bibliotekanauki.pl/articles/117587.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: maritime accidents
marine catastrophes
competitive computing Technologies
sea catastrophes
decision support
complex dynamice environments
catastrophe theory
Emergency Computing Center (ECC)
Opis:: The paper considers the structure and functional elements of the emergency computing center that carries out operational control of sea catastrophes of vessels of the fishing fleet based on the integration of intelligent systems of new generations and high‐performance computing within the problem‐oriented dynamic environment of the virtual testing area. The real time operation of the computer center is provided by the system integration of information, algorithmic and software support based on dynamic measurement data and a structured knowledge base. The focus is on providing decision support in complex dynamic environments using modern catastrophe theory.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 4; 701-707
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

Artykuł

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