Bifurcations and a chaos strip in states of long Josephson junctions

Stationary and nonstationary, in particular, chaotic states in long Josephson junctions are investigated. Bifurcation lines on the parametric bias current-external magnetic field plane are calculated. The chaos strip along the bifurcation line is observed. It is shown that transitions between stationary states are the transitions from metastable to stable states and that the thermodynamical Gibbs potential of these stable states may be larger than for some metastable states. The definition of a dynamical critical magnetic field characterizing the stability of the stationaryComment: 13 pages, 6 Postscript figures, uses revtex.st

From quality education to the qualities of the person

Рассматриваются проблемы качества профессионального образования. Подчеркивается, что задача педагога заключается в том, чтобы на всем протяжении обучения постоянно удерживать в своем сознании все три измерения ценности образования, не теряя из вида ни Культуру, ни Человека, ни ЭкономикуThe article discusses the problem of quality of professional education. It is stressed that the task of the teacher throughout the training, constantly keep in your mind all three dimensions of values education, without losing sight of the Culture, or the Econom

Professional standard pedagogical activities in vocational education and training

The article presents the methodological issues of the development and implementation of professional standards in education and science: the need and the possibility to standardize of pedagogical and research activity, the destination of professional standards, approaches and problems of their developmentВ статье рассматриваются методологические и методические вопросы разработки и внедрения профессиональных стандартов в области образования и науки: необходимость и возможность стандартизации педагогической и научно-исследовательской деятельности, назначение профессиональных стандартов, подходы и проблемные точки их разработк

Search for AGN counterparts of unidentified Fermi-LAT sources with optical polarimetry: Demonstration of the technique

The third Fermi-LAT catalog (3FGL) presented the data of the first four years of observations from the Fermi Gamma-ray Space Telescope mission. There are 3034 sources, 1010 of which still remain unidentified. Identifying and classifying gamma-ray emitters is of high significance with regard to studying high-energy astrophysics. We demonstrate that optical polarimetry can be an advantageous and practical tool in the hunt for counterparts of the unidentified gamma-ray sources (UGSs). Using data from the RoboPol project, we validated that a significant fraction of active galactic nuclei (AGN) associated with 3FGL sources can be identified due to their high optical polarization exceeding that of the field stars. We performed an optical polarimetric survey within $3\sigma$ uncertainties of four unidentified 3FGL sources. We discovered a previously unknown extragalactic object within the positional uncertainty of 3FGL J0221.2+2518. We obtained its spectrum and measured a redshift of $z=0.0609\pm0.0004$. Using these measurements and archival data we demonstrate that this source is a candidate counterpart for 3FGL J0221.2+2518 and most probably is a composite object: a star-forming galaxy accompanied by AGN. We conclude that polarimetry can be a powerful asset in the search for AGN candidate counterparts for unidentified Fermi sources. Future extensive polarimetric surveys at high galactic latitudes (e.g., PASIPHAE) will allow the association of a significant fraction of currently unidentified gamma-ray sources.Comment: accepted to A&