Samara, Russia

Samara State University
Samara, Russia

Samara State University is a classical multi-faculty university and a leading educational institution of higher education in Samara Oblast, Russia. It consists of faculties of Mathematics and Mechanics, Physics, Biology, Chemistry, Philology, History, Sociology, Economy and Management, Psychology, and Law. It is traditionally considered to be the most prestigious graduate school in Samara and the area, especially with its highly competitive and demanded programmes in the English Language, Law, Sociology and Political Science, International Relations, Psychology. SSU is also marked for its postgraduate research in the science and the Humanities.SSU has its own newspaper, a regularly printed academic journal, as well as journals for students publications. SSU is a centre of teaching and research in Samara Region with a perfect reputation nationally and globally. SSU is one of the few Russian universities which issues the European Diploma Supplement to the State Diploma of Higher Education, which confirms educational standards according to international standards .The English language is taught here by high-qualified lecturers at several departments. Wikipedia.

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Carlucci L.,University of Milan | Ciani G.,University of Milan | Proserpio D.M.,University of Milan | Proserpio D.M.,Samara State University | And 2 more authors.
Chemical Reviews | Year: 2014

Many of the reported species exhibit the intriguing feature of interpenetration or other types of entanglements. The properties of these materials are related not only to their molecular structures but also to the topology of the individual networks as well as to the way in which the individual nets are entangled. Different synthetic procedures have been developed to attain a certain control of entanglement in coordination networks, and recently some reviews have appeared that are focused on factors governing the entanglements, having in mind their potential applications. However, these analyses are mostly devoted to 3D networks thanks to the great wealth of data on interpenetration. Simplification of a network that contains 2-loops can lead to complete disappearance of the entanglement, and therefore such networks were picked out into a separate group.

Blatov V.A.,Samara State University | Ilyushin G.D.,Russian Academy of Sciences | Proserpio D.M.,University of Milan
Chemistry of Materials | Year: 2013

In the attempt to explain why there are so many hypothetical zeolites and so few observed, a model of assembling zeolite-type frameworks as a packing of natural building units (smallest cages) and/or essential rings (smallest windows) is proposed. The packing units have no common T atoms, hence the model takes into account the process of polycondensation of T4+(OH) 4 or [T3+(OH)4]- complex groups resulting in oligomeric TnOm(OH)k units, eliminating water molecules, and forming T-O-T bridges. The packings were modeled for all zeolite minerals and most of the synthetic zeolite-type frameworks accounting for 163 zeolites of the 201 known. It is shown that the extra-framework cations can play a role of templates for the packing units. Application of the model to 1220 hypothetical zeolites shows that only a small set could be explained as packing of tiles, suggesting a possible ranking of feasibility that may help to unravel the zeolite conundrum. © 2013 American Chemical Society.

Blatov V.A.,King Abdulaziz University | Shevchenko A.P.,Samara State University | Proserpio D.M.,University of Milan
Crystal Growth and Design | Year: 2014

Basic concepts of computer topological analysis of crystal structures realized in the current version of the program package ToposPro are considered. Applications of the ToposPro methods to various classes of chemical compounds-coordination polymers, molecular crystals, supramolecular ensembles, inorganic ionic compounds, intermetallics, fast-ion conductors, microporous materials-are illustrated by many examples. It is shown that chemically and crystallographically different structures can be automatically treated in a similar way with the ToposPro approaches. © 2014 American Chemical Society.

Tkachenko K.S.,Samara State University
Marine Environmental Research | Year: 2012

Ihavandippolu, the northernmost atoll of the Maldives, experienced severe coral bleaching and mortality in 1998 followed by several bleaching episodes in the last decade. Coral cover in the 11 study sites surveyed in July-December of 2011 in the 3-5 m depth range varied from 1.7 to 51%. Reefs of the islands located in the center of Ihavandippolu lagoon have exhibited a very low coral recovery since 1998 and remain mostly degraded 12 years after the impact. At the same time, some reefs, especially in the inner part of the eastern ring of the atoll, demonstrate a high coral cover (>40%) with a dominance of branching Acropora that is known to be one of the coral genera that is most susceptible to thermal stress. The last severe bleaching event in 2010 resulted in high coral mortality in some sites of the atoll. Differences in coral mortality rates and proportion between " susceptible" and " resistant" taxa in study sites are apparently related to long-term adaptation and local hydrological features that can mitigate thermal impacts. Abundant herbivorous fish observed in the atoll prevent coral overgrowth by macroalgae even on degraded reefs. Despite the frequent influence of temperature anomalies and having less geomorphologic refuges for coral survivals than other larger Maldivian atolls, a major part of observed coral communities in Ihavandippolu Atoll exhibits high resilience and potential for further acclimatization to a changing environment. © 2012 Elsevier Ltd.

Blatov V.A.,Samara State University
Structure and Bonding | Year: 2011

A total of 569 crystal structures of anhydrous simple salts M y(LO3)z (L∈=∈B, C, N, S, Se, Te, Cl, Br, I) and My(XO4)z (X∈=∈Si, Ge, P, As, S, Se, Cl, Br, I) are considered as three-periodic nets of M y(L/X)z, where M are cations derived from metal atoms whereas (L/X) are conventional cations derived from nonmetal atoms. Both L and X cations are located in the centers of triangular/trigonal-pyramidal LO 3 and tetrahedral XO4 oxoanions, respectively. The cation arrays (M+L/X) are proved to be the elements determining and governing the topology of the respective crystal structures, whereas the oxygens seem to play a secondary role as links between the cations. The preponderant role of cations in determining the crystal structures is founded on a greater uniformity (regularity) of their arrays when compared with those of anions or, even, with mixed cation-anion arrangements. In about three-fourth of the crystal structures analyzed in this work, the cation arrays appear to be topologically equivalent to some binary compounds, such as NaCl, NiAs, FeB, and α-Al 2O3. The influence of both charge and size on the resulting array topology is also studied in detail. A quasi-binary representation My[L/X]z is proposed as a general model for the crystal structures of these anhydrous oxoacid salts. © 2011 Springer-Verlag Berlin Heidelberg.

Bourdine A.V.,Samara State University
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

Method for mode coupling coefficient estimation of arbitrary order guided modes at the splice of diverse optical fibers under axial and angular misalignments is proposed. It is based on the well-known overlap integral method and modified Gaussian approximation been generalized for analysis of the weakly guiding optical fibers with an arbitrary axialsymmetric refractive index profile. Analytical expressions for the arbitrary order mode coupling coefficients under splice misalignments were developed. Some results of proposed method approbation are represented. © 2013 SPIE.

Mitina T.G.,Samara State University | Blatov V.A.,King Abdulaziz University
Crystal Growth and Design | Year: 2013

We have performed comprehensive topological analysis of 2-periodic coordination networks in 10 371 metal-organic compounds. Both local and overall topologies of complex groups were determined, classified, and stored in the electronic databases. Two plane nets, square lattice (sql) and honeycomb (hcb), were found to compose two-thirds of all the coordination networks. Strong correlations were found between local topological characteristics (coordination numbers of atoms or complex groups, coordination figures, formalized coordination modes of ligands and coordination formula) and the overall topology that in many cases allowed us to predict possible topological motifs from the data on chemical composition with high probability. The possibility to develop an expert system that could envisage local and overall topology of periodic coordination networks is discussed, and an example is given of how such a system can work. © 2013 American Chemical Society.

Blatov V.A.,Samara State University
Structural Chemistry | Year: 2012

General principles of the analysis of intermetallic compounds with the program package TOPOS are considered. The nanocluster method is described in detail, which lies in the base of the TOPOS "Nanoclustering" procedure. The applications of the nanocluster method to intermetallic compounds as well as to porous materials are comprehensively overviewed. The perspectives of extending the nanocluster model to other classes of inorganic compounds are outlined. © Springer Science+Business Media, LLC 2012.

Saleev V.A.,Samara State University | Shipilova A.V.,Samara State University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2012

We study inclusive b-jet and bb̄-dijet production at the CERN LHC invoking the hypothesis of gluon Reggeization in t-channel exchanges at high energy. The b-jet cross section includes contributions from open b-quark production and from b-quark production via gluon-to-bottom-pair fragmentation. The transverse-momentum distributions of inclusive b-jet production measured with the ATLAS detector at the CERN LHC in different rapidity ranges are calculated both within multi-Regge kinematics and quasi-multi-Regge kinematics. The bb̄-dijet cross section is calculated within quasi-multi-Regge kinematics as a function of the dijet invariant mass M jj, the azimuthal angle between the two jets Δ, and the angular variable χ. At the numerical calculation, we adopt the Kimber-Martin-Ryskin and Blümlein prescriptions to derive unintegrated gluon distribution function of the proton from its collinear counterpart for which we use the Martin-Roberts-Stirling- Thorne set. We find good agreement with measurements by the ATLAS and CMS Collaborations at the LHC at the hadronic c.m. energy of √S=7TeV. © 2012 American Physical Society.

Gorokhov A.V.,Samara State University
Progress in Biomedical Optics and Imaging - Proceedings of SPIE | Year: 2013

The influence of chaotic behavior of coherent state (CS) parameters on entanglement dynamics in system of two level atoms and photons in cavity is investigated. The initial state of the system is chosen as factorized production of photon and atomic coherent states. To find a solution of the Schrödinger equation, we presented the time-dependent wave function in the form of a wave packet in CS representation. The phase portraits and Poincare sections for classical dynamics of CS were computed, and time dependence of the mean number of photons level populations and atomic entropy were calculated in quantum case. The analysis showed that the chaotic behavior in quantum-optical Dicke model increases the degree of entanglement in the atomic subsystem. At the same time greater entanglement is generated when selecting the initial atomic CS parameters near the center of the corresponding Poincare sections. It is considered dynamics of two identical two-level atoms in non-ideal cavity (nonideal Tavis-Cummings model). Accounting for decay showed that the generation of atomic entanglement is accompanied by the return of the initial separable state ("death" of entanglement), but this behavior with the increase of the initial parameter of the field CS is only at sufficiently small times. Influence of detuning and damping constants are considered. © 2013 SPIE.

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