Non-canonical propagation of high-order elliptic vortex-beams in a uniaxial crystal

We have derived the corresponding equations and found their solutions both for nonparaxial and paraxial beams. The paraxial solutions we have presented in the form of the generalized Hermite-Gaussian beams propagating perpendicular to the optical axis of a uniaxial crystal. We have also constructed the generalized Laguerre-Gaussian beams at the z=0 plane and analyzed their evolution in a homogeneous isotropic medium. Comparing it with the evolution of the standard Laguerre-Gaussian beams with and in the crystal we have revealed that the additional elliptic deformation of the extraordinary beam results in topological reactions that essentially distorts field structure for the account of different rotation rates of the vortex row originated from the centered degenerate optical vortex and the conoscopic pattern. We have predicted conversion of the vortex topological charge at the beam axis similar to that in astigmatic lenses and analyzed the radical differences with this process. We have revealed the synchronic oscillations of the spin angular momentum and the sign of the vortex topological charge at the beam axis.Comment: 19 pages, 9 figure

Non-canonical propagation of high-order elliptic vortex beams in a uniaxially anisotropic medium

Abstract We have analysed propagation of nonparaxial and paraxial beams perpendicular to the optic axis in a uniaxially anisotropic medium (unbounded optically uniaxial crystal). We have presented the paraxial solutions in the form of generalised Hermite-Gaussian beams propagating perpendicular to the optic axis in a uniaxially anisotropic medium. We have also constructed the generalised Laguerre-Gaussian beams at the z=0 plane and analysed their evolution in a homogeneous isotropic medium. Comparing it with the evolution of standard Laguerre-Gaussian beams with n=0 and m≠0 in the crystal, we have revealed that the additional elliptic deformation of the extraordinary beam results in topological reactions that essentially distort the field structure for the account of different rotation rates of the vortex row originated from the centred degenerate optical vortex and the conoscopic pattern. We have predicted conversion of the vortex topological charge at the beam axis similar to that in astigmatic lenses and analysed the radical differences with this process. We have revealed synchronic oscillations of the spin angular momentum and the sign of the vortex topological charge at the beam axis

Deviant behavior of youth in the context of psychology and pedagogy

The article notes that Analysis of psychological and pedagogical literature allowed us to identify the following factors influencing formation and development of various deviant behavior forms: socio-economic, sociocultural, biological, psychological, pedagogical, subcultural. Most researchers consider the violation of social norms and norms of behavior as the main criterion for deviations and consider this phenomenon in term of “adaptation (socialization) - disadaptation (de-socialization)

Медикаментозная коррекция системы гемостаза при хирургическом лечении геморрагической формы апоплексии яичника

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MATRIX METALLOPROTEINASES AND TISSUE INHIBITORS OF MATRIX METALLOPROTEINASES DURING PREGNANCY AND DELIVERY

Matrix metalloproteinases are main proteolytic enzymes breaking down most components of extracellular matrix of various tissues. In the review shows role of matrix metalloproteinases and tissue inhibitors of matrix metalloproteinases during implantation, morphogenesis, and. delivery

BIOTIC DIVERSITY OF KARELIA: CONDITIONS OF FORMATION, COMMUNITIES AND SPECIES

The monograph generalises vast data characterising the diversity of the biota in Russian Karelia. The data pool includes both materials of long-term studies, and new data collected in 1997–2000 within the Russian-Finnish project “Inventory and studies of biological diversity in Republic of Karelia”. The volume is composed of four interrelated chapters. Chapter one provides a detailed account of the climatic, geological, geomorphological, hydrological and soil conditions in which the regional biota has been forming. Chapter two describes and evaluates the diversity of forest, mire and meadow communities, and the third chapter details the terrestrial biota at the species level (vascular plants, mosses, aphyllophoroid fungi, lichens, mammals, birds, insects). A special section is devoted to the flora and fauna of aquatic ecosystems (algae, zooplankton, periphyton, macrozoobenthos, fishes). Wide use is made of various zoning approaches based on biodiversity-related criteria. Current status of the regional biota, including its diversity in protected areas, is analysed with elements of the human impact assessment. A concise glossary of the terms used is annexed. This is an unprecedentally multi-faceted review, at least for the taiga zone of European Russia. The volume offers extensive reference materials for researchers in a widest range of ecological and biological fields, including graduate and post-graduate students. The monograph is also available in Russian

Optical vortices and the flow of their angular momentum in a multimode fiber

Abstract. The problem of propagation of optical vortices in multimode fibers is considered. The structural changes experienced by the wave and ray surfaces in their transformation from the free space to a fiber medium are determined. The continuity equation is obtained for the flow of the vortex angular momentum in an unhomogeneous medium

Deviant behavior of youth in the context of psychology and pedagogy

The article notes that Analysis of psychological and pedagogical literature allowed us to identify the following factors influencing formation and development of various deviant behavior forms: socio-economic, sociocultural, biological, psychological, pedagogical, subcultural. Most researchers consider the violation of social norms and norms of behavior as the main criterion for deviations and consider this phenomenon in term of “adaptation (socialization) - disadaptation (de-socialization)