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Science Newsletter of the Faculty fo Physics
This is a new bulletin, which, as we hope, will bring fresh, updated information on scientific news, research activities, and related events in the life of our department to our staff members, undegraduate and graduate students, postdocs, collaborators and partners. We greatly hope that this Science Newsletter will help us to find new partners in research and shorten the way from fundamental research to applications and innovations, from our fundamental discoveries to their successful implementations in not too distant future.
XIV National School-Seminar "Wave phenomena in inhomogeneous media"
The conference papers from the School-Seminar «Waves-2014» will be submitted for publishing in the Memoirs of the Faculty of Physics journal.
2015 / 1
R e g u l a r p a p e r s
Radiophysics, electronics, acoustics
V.G. Shamaev, A.B. Gorshkov, L.G. Gushchina, V.I. Yakimenko
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We address the problem of retrieval of Russian scientific papers in the Web. The absence of these papers in foreign databases leads to their loss to the scientific community. In this connection, attention is drawn to the Russian-language information search system (ISS) – Scientific Electronic Library (http://elibrary.ru/), portal MathNet (http://www.mathnet.ru/). The Russian-language part of the database VINITI (http: / /www2.viniti.ru/) is criticized. We briefly describe our «Information System „Acoustic“. Russian-language sources» (http://akdata.ru/). The system contents nearly 30000 papers covering 300 periodicals from Russia and CIS countries, as well as books and conference proceedings. Particular attention is paid to the full-text archives of «Uspekhi Fizicheskikh Nauk» (http://ufn.ru/) and «Akusticheskij Zhurnal» (http://www.akzh.ru/), as well as the site of «Current Contents. Acoustics» (http: //akinfo.ru/). Hide Abstract
N.V. Shirgina, A.I. Kokshayskiy, A.I. Korobov
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The paper presents the results of investigations of the elastic properties of unconsolidated granular medium (GUM) when the structural phase transitions under the influence of external static effects appear. As a model of the media we used a system of metal balls with a diameter of 2 mm and 4 mm. We experimentally observed anomalous behavior of nonlinear elastic parameters under the influence of changing of external static pressure, which in turn causes structural phase transition in the system. The emergence of a structural phase transition in the sample was independently confirmed by measuring the electrical resistance of the system according to the external static force. The analysis of the results was based on the Hertz theory. Hide Abstract
Optics and spectroscopy. Laser physics
M.V. Kovalchuk, P.V. Korolenko, Yu. V. Ryzhikova
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The procedure for constructing two-dimensional aperiodic constructive fractals and their classification are considered. The analysis of the experimental data indicates that the nanoparticle system in liquids, gases and on flat substrates can be characterized as spatially separated distribution of the particles and the presence of aggregate formation. Simulation of the nanoparticle distribution showed that even externally disordered nanoparticle systems without structural self-similarity can generate fractal diffraction patterns. The possibility to identify the various nanoparticle systems based on the definition of the scaling parameters as in diffraction patterns and within the objects is analyzed. Hide Abstract
