rnadsky Crimean Federal University

Simferopol, Russia

rnadsky Crimean Federal University

Simferopol, Russia
SEARCH FILTERS
Time filter
Source Type

Zadnipriana O.,P Shupyk National Medical Academy Of Post Graduate Education | Tretiakova O.,rnadsky Crimean Federal University
Psychiatry, Psychotherapy and Clinical Psychology | Year: 2016

The article provides an overview of the problem of psycho-emotional and social disorders of women with acne: anxiety, depressive disorders and social phobia that does not correlate with the severity of acne. The substantiation of the need for a multidisciplinary approach to the treatment of diseases involving dermatologists and psychiatrists is submitted which except for the treatment for acne therapy must include correction of psycho-emotional disorders, forming of patient's life credo in order to restore a high level of social functioning "despite of the disease". It provides achieving and maintaining of a high level of social comfort of women and occupation a respectable place in society.


Sylgacheva D.,Moscow State University | Khokhlov N.,Moscow State University | Kalish A.,Moscow State University | Dagesyan S.,Moscow State University | And 7 more authors.
Optics Letters | Year: 2016

This Letter presents a theoretical and experimental study of waveguide modes of one-dimensional magneto-photonic crystals magnetized in the in-plane direction. It is shown that the propagation constants of the TM waveguide modes are sensitive to the transverse magnetization and the spectrum of the transverse magneto-optical Kerr effect has resonant features at mode excitation frequencies. Two types of structures are considered: a non-magnetic photonic crystal with an additional magnetic layer on top and a magneto-photonic crystal with a magnetic layer within each period. We found that the magneto-optical non-reciprocity effect is greater in the first case: it has a magnitude of δ ∼ 10-4, while the second structure type demonstrates δ ∼ 10-5 only, due to the higher asymmetry of the claddings of the magnetic layer. Experimental observations show resonant features in the optical and magneto-optical Kerr effect spectra. The measured dispersion properties are in good agreement with the theoretical predictions. An amplitude of light intensity modulation of up to 2.5% was observed for waveguide mode excitation within the magnetic top layer of the non-magnetic photonic crystal structure. The presented theoretical approach may be utilized for the design of magneto-optical sensors and modulators requiring pre-determined spectral features. © 2016 Optical Society of America.


Miroshnichenko E.P.,rnadsky Crimean Federal University | Ushakov A.V.,rnadsky Crimean Federal University | Kubyshkin V.F.,rnadsky Crimean Federal University
Russian Journal of Cardiology | Year: 2016

Aim. To assess the dynamics of aldosterone in blood serum and structurefunctional parameters of the heart in myocardial infarction patients, developed on the background of non-differentiated connective tissue dysplasia. Material and methods. Totally, 90 patients included with Q-myocardial infarction with non-differentiated connective tissue dysplasia and without it. The controls were almost healthy persons without cardiovascular pathology, comparison group — patients with connective tissue dysplasia but not having cardiovascular pathology. Clinical and phenotypic assessment was done, echocardiography, aldosterone levels measurement in serum at dynamics of the infarction course. Results. All patients, independent of existence of connective tissue dysplasia, showed aldosterone elevation at 1st day of infarction with further decrease to the level of controls or comparison in 28 days. In the group of infarction patients with non-differentiated connective tissue dysplasia there was significant enlargement of the left ventricle size, reduced pumping function with tendency to less prominent myocardial mass index increase comparing with those not having dysplasia. Conclusion. Presence of non-differentiated connective tissue dysplasia does not influence aldosterone levels and their dynamics in myocardial infarction, but is associated with adverse type of postinfarction remodeling of the heart presenting with the left ventricle dilatation and decrease of its pumping function. © Russian Journal of Cardiology.


Dzedolik I.V.,rnadsky Crimean Federal University | Pereskokov V.,rnadsky Crimean Federal University
Journal of Physics: Conference Series | Year: 2016

We theoretically have investigated the properties of the phonon-polariton waves propagating in Kerr-type dielectric medium, and examined the conditions of appearance of the spatial solitons, cnoidal waves and polariton vortices. It is shown that the polariton flow can propagate in the form of spatial soliton, or can be split into several flows in the form of filaments depending on the field density and parameters of the nonlinear medium. In the polariton flow the vortices may appear at the presence of local inhomogeneities of medium refractive index causing the wavefront rotation. © Published under licence by IOP Publishing Ltd.


Alexeyev C.N.,rnadsky Crimean Federal University | Lapin B.P.,rnadsky Crimean Federal University | Milione G.,City College of New York | Yavorsky M.A.,rnadsky Crimean Federal University
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2016

We have studied the influence of a twist defect in multihelicoidal Bragg fibers on the emerging of localized defect modes. We have shown that if such a fiber is excited with a Gaussian beam this leads to the appearance of a defect-localized topological state, whose topological charge coincides with the order of rotational symmetry of the fiber's refractive index. We have shown that this effect has a pronounced crossover behavior. We have also formulated a principle of creating the systems that can nestle defect-localized topologically charged modes. According to this principle, such systems have to possess topological activity, that is, the ability to change the topological charge of the incoming field, and operate in the Bragg regime. © 2016 American Physical Society.


Alexeyev C.N.,rnadsky Crimean Federal University | Lapin B.P.,rnadsky Crimean Federal University | Milione G.,City University of New York | Yavorsky M.A.,rnadsky Crimean Federal University
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2015

We have studied optical activity in optical fibers that possess multihelical distribution of the refractive index profile. We have demonstrated through an analytical treatment that the effect of optical activity is caused by asymmetric spin-dependent influence of the spin-orbit interaction on the coupling between the fundamental mode and the higher-order modes. We have provided a simple analytical expression for the coefficient of optical activity. © 2015 American Physical Society.


Dzedolik I.V.,rnadsky Crimean Federal University | Pereskokov V.,rnadsky Crimean Federal University
Journal of the Optical Society of America A: Optics and Image Science, and Vision | Year: 2016

The TM-mode of surface plasmon polaritons (SPPs) can be excited at the interface of a metal layer and a dielectric medium. The E-mode of the SPPs is excited due to reflection of the TM-mode from the boundary of inhomogeneity in the metal layer. The interference of these modes leads to the formation of the SPP vortices in the points of minima of the mode field in some components of the Poynting vector of the SPP. The SPP interference vort expattern changes depending on the curvature of the boundary of inhomogeneity in the metal layer, and the vorti cesappear and disappear in the components of the Poynting vector. © 2016 Optical Society of America.


Lelyakov A.P.,rnadsky Crimean Federal University
Gravitation and Cosmology | Year: 2015

We consider the dynamics of a test null string in the gravitational field of a closed null string of constant (invariable in time) radius, whose direction of motion is at any time orthogonal to the plane in which the null string is located. An analysis of the solutions obtained makes it possible to assume that, in principle, some properties of a null string gas can be of interest from a cosmological viewpoint. For example, their ability of accelerated expansion and contraction, the opportunity of a grain structure, the ability to form stable polarized states and a domain structure. © 2015, Pleiades Publishing, Ltd.


Alexeyev C.N.,rnadsky Crimean Federal University | Lapin B.P.,rnadsky Crimean Federal University | Yavorsky M.A.,rnadsky Crimean Federal University
Optics Letters | Year: 2016

We have studied the effect of optical activity (OA) in optical fibers with multihelical distribution of refractive index profiles near the resonance wavelength, at which the conversion of an incident Gaussian beam into an optical vortex (and vice versa) takes place. We have shown that at such a wavelength the polarization vector of the input Gaussian beam rotates within the fiber at an average rate proportional to the difference in propagation constants of left- and right-circularly polarized optical vortices with the same topological charge. We also show that for certain fiber lengths the magnitude of OAcan greatly exceed its average level and reach anomalously high values. © 2016 Optical Society of America.


Alexeyev C.N.,rnadsky Crimean Federal University | Milodan A.V.,rnadsky Crimean Federal University | Alexeyeva M.C.,rnadsky Crimean Federal University | Yavorsky M.A.,rnadsky Crimean Federal University
Optics Letters | Year: 2016

In this Letter, we study the propagation of optical vortices (OVs) in a two-coil multimode fiber resonator. We suggest an analytical scheme of solving this problem based on its reduction to one of propagation of OVs in parallel evanescently coupled optical fibers. In the framework of the scalar approximation, we derive expressions for normal modes of the system and study evolution of an OV with an arbitrary topological charge excited at the input end of the resonator. We show that such a coil resonator is able to invert the topological charge of the incoming OV, provided the resonance condition is met. © 2016 Optical Society of America.

Loading rnadsky Crimean Federal University collaborators
Loading rnadsky Crimean Federal University collaborators