bluuebunny/crossref_metadata_2025 huggingface dataset:
Resonant diffraction gratings for differentiation of optical signals in reflection and transmission
Authors:   Image Processing Systems Institute of the RAS, Golovastikov N. ,   Samara State Aerospace University (National Reseach University), Bykov D. ,   Image Processing Systems Institute of the RAS,   Samara State Aerospace University (National Reseach University), Doskolovich L. ,   Image Processing Systems Institute of the RAS,   Samara State Aerospace University (National Reseach University), Soifer V. ,   Image Processing Systems Institute of the RAS,   Samara State Aerospace University (National Reseach University)
Published: September 2016

The propagation of an optical pulse through a diffraction grating with a resonance at the pulse’s central frequency is considered. It is demonstrated that afore-mentioned gratings can perform time-domain differentiation of optical pulses in reflection and transmission. The correlation between the amplitude of the transformed pulse and the differentiation quality is investigated. A resonant grating intended for differentiation of picosecond pulses in reflection and transmission is computed.
Integral transform for gradient-index media with linear dependence of dielectric permittivity on transverse cartesian coordinates
Authors:   Image Processing Systems Institute of the RAS, Kovalev A. ,   S.P. Korolyov Samara State Aerospace University (National Reseach University), Kotlyar V. ,   Image Processing Systems Institute of the RAS,   S.P. Korolyov Samara State Aerospace University (National Reseach University), Kalinkina D. ,   S.P. Korolyov Samara State Aerospace University (National Reseach University)
Published: September 2016

We have obtained an integral transform describing paraxial propagation of a light beam in gradient-index media with linear dependence of dielectric permittivity on transverse Cartesian coordinates. We have shown that propagation of light in such media is equivalent to passing through the prism, propagating in homogeneous media and again passing through the same prism. We have also shown that for the Gaussian beam, propagating in such media, its center is being shifted along a parabola, its radius is coinciding with radius of the Gaussian beam in homogeneous media.
Rotation of microturbine in complex vortex beams
Authors:   Image Processing Systems Institute of the RAS, Morozov A. ,   S.P. Korolyov Samara State Aerospace University (National Reseach University), Skidanov R. ,   Image Processing Systems Institute of the RAS,   S.P. Korolyov Samara State Aerospace University (National Reseach University)
Published: September 2016

Describes the production of microturbines by two-photon polymerization. Describes experiments on the rotation of the microturbines in a special form of complex vortex light beams.
Design and analysis of the compact plastic refractive-diffractive zoom lens
Authors:   Penza State University of Architecture and Construction, Greysukh G. , Ezhov E. ,   Penza State University of Architecture and Construction, Sidyakina Z. ,   Penza State University of Architecture and Construction, Stepanov S. ,   Penza State University of Architecture and Construction
Published: September 2016

The principles and main stages arranging of the zoom lens optical scheme are presented. They include a selection of the original scheme and its transformation by the addition of the diffractive lens and replace the glass of refractive lenses most technologically and commercially available optical plastics. Design parameters and results of analysis of designed the compact plastic refractive-diffractive zoom lens are given.
Mathematical model of completely optical system for detection of mode propagation parameters in an optical fiber with few-mode operation for adaptive compensation of mode coupling
Authors:   Ufa State Aviation Technical University, Lyubopytov V. , Tlyavlin A. ,   Ufa State Aviation Technical University, Sultanov A. ,   Ufa State Aviation Technical University, Bagmanov V. ,   Ufa State Aviation Technical University, Khonina S. ,   Image Processing Systems Institute RAS, Karpeev S. ,   Image Processing Systems Institute RAS, Kazanskiy N. ,   Image Processing Systems Institute RAS
Published: September 2016

In this article we propose a method for optical-domain compensation of distortions caused by the mode coupling in communication systems with mode division multiplexing. The proposed method is based on the spatial-spectral interrelation between the mode composition and the laser beam electromagnetic field distribution and on the using of a real-time programmable diffractive optical element implemented with a spatial light modulator. This method is promising to reduce the computational complexity of MDM-systems and increase significantly the modal channel baud rate due to exclusion of complex digital signal processing when mode-coupling compensating.
Research of influence of parameters of ultrashort pulse on intensity of precursors
Authors:   Image Processing Systems Institute of the RAS, Kozlova E. , Kotlyar V. ,   Image Processing Systems Institute of the RAS
Published: September 2016

Simulation of short optical pulses in the planar waveguide of silica glass showed that in the case of initial rectangular pulse with a carrier wavelength λ0=532 nm (away from resonance) and pulse duration equal 0,5λ0(n+0,5), n - an integer, precursors intensity increases by about 2 at a distance of tens of microns away from the origin. Although intensity of precursors is about 1% compared with the intensity of the main pulse. But if you choose the length of the pulse wave at the nearest resonance (λ0=120 nm), the intensity of the precursors may exceed the intensity of the main pulse of 4 times.
Heuristic algorithm for finding approximate solution of steiner problem based on physical analogies
Authors:   Omsk State Technical University, Lisin A. , Faizullin R. ,   Omsk State Technical University
Published: September 2016

The article contains analyze of existent methods for solving Steiner problem that use physical analogies. Algorithm for construction of minimal Steiner trees based on existent solutions and Delaunay triangulation for initial approximation is suggested. Done comparison of suggested algorithm output and one with exponential complexity, which produces exact results.
Method of obtaining unnoise image on the basis of video sequence handling
Authors:   Scientific Research Institute of Multiprocessor Computing Systems of Southern Federal University (SRI MCS SFEDU), Korovin I. , Khisamutdinov M. ,   Scientific Research Institute of Multiprocessor Computing Systems of Southern Federal University (SRI MCS SFEDU)
Published: September 2016

A method of video sequences handling with the purpose of receiving a single unnoisy image is proposed in the paper. Image combination algorithm is developed based on the approach of point correspondences and resolution enhancement. The algorithm for addition of multiple images with the purpose of receiving a single unnoisy image is developed. Experimental studies of the proposed method are held.
Model of the contour of the image with a random shape
Authors:   Volga State Technological University, Khafizov R.
Published: September 2016

The approach to the formation of a statistical model of a contour of the image with a random shape is presented. The technique of correction of parameters of linear transformations of realizations of a random contour is offered at formation of its model.
Joint finite – difference solution of the d’alembert and maxwell’s equations. Two – dimensional case
Authors:   S.P. Korolyov Samara State Aerospace University (National Research University), Buldygin E. , Golovashkin D. ,   Image Processing Systems Institute of the Russian Academy of Sciences, Yablokova L. ,   S.P. Korolyov Samara State Aerospace University (National Research University)
Published: September 2016

The technique of searching of the collateral finite – difference solution of a wave equation and set of equations of Maxwell is offered, allowing to combine advantage and to avoid shortcomings of both made mention numerical methods of nanophotonics (to reduce expenses of memory and to apply well-known TF/SF and PML techniques). In a two – dimensional case on test examples convergence of such decision, possibility of imposing of PML-ayers and a task of an incident wave on the TF/SF technology are shown.
Solution of expanded pulse – propagation equation for optical fibers
Authors:   S.P. Korolyov Samara State Aerospace University (National Research University), Alimenkov I. , Pchelkina Yu. ,   S.P. Korolyov Samara State Aerospace University (National Research University)
Published: September 2016

It is found the solution of expanded pulse – propagation equation for optical fibers.
Diffraction-free asymmetric elegant bessel beams with fractional orbital angular momentum
Authors:   Image Processing Systems Institute of the Russian Academy of Sciences, Kotlyar V. ,   S.P. Korolyov Samara State Aerospace University (National Research University), Kovalev A. ,   Image Processing Systems Institute of the Russian Academy of Sciences,   S.P. Korolyov Samara State Aerospace University (National Research University), Soifer V. ,   Image Processing Systems Institute of the Russian Academy of Sciences,   S.P. Korolyov Samara State Aerospace University (National Research University)
Published: September 2016

This paper introduces a new family of diffraction-free asymmetric elegant Bessel beams (EB-beams) with fractional orbital angular momentum (OAM). EB-beams are modes of free space and described by the n-th order Bessel function of the first kind with a complex argument. Functions of complex amplitudes of EB-beams are orthogonal by continuous scaling parameter and not orthogonal on a discrete parameter (topological charge). The intensity distribution of EB-beams has a countable number of isolated zeros of intensity, located on the horizontal axis. These zeros are centers of optical vortices with unit topological charge and opposite signs on different sides of the origin. Isolated intensity zero on the optical axis generates an optical vortex with topological charge of n. OAM of the EB-beams is (n + 0,69777)h per photon, where h is the Planck's constant.
Diffractive optical elements for the formation of combinations of vortex beams in the problem manipulation of microobjects
Authors:   Image Processing Systems Institute of the Russian Academy of Sciences, Skidanov R. ,   S.P. Korolyov Samara State Aerospace University (National Research University), Ganchevskaya S. ,   S.P. Korolyov Samara State Aerospace University (National Research University)
Published: September 2016

Presented diffractive optical elements for the formation of a superposition of optical vortex with different topological charges. Presented results of mathematical modeling of diffraction of light on such DOE.
Photonic nanojets formed by square microsteps
Authors:   Image Processing Systems Institute of the Russian Academy of Sciences, Kotlyar V. , Stafeev S. ,   Image Processing Systems Institute of the Russian Academy of Sciences, Feldman A. ,   FLIR Optical Component Group (Charlotte, USA)
Published: September 2016

It was experimentally shown that square microsteps with width of 0.4 um, 0.5 um, 0.6 um, 0.8 um and height of 500 nm illuminated by linearly polarized laser light with wavelength λ = 633 nm formed near its’ surface focal spots (photonic nanojets) with intensity that is 6 times higher than the intensity of incident light and diameters of 0.44λ, 0.43λ, 0.39λ and 0.47λ (less than the diffraction limit 0.51λ). When the square width was smaller than the wavelength, the focal spot was located inside the step. When the square width was larger than the wavelength, the focal spot was located outside the step and looks like a handle.
Rotating elegant bessel-gaussian beams
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Kotlyar V. ,   Samara State Aerospace University, Kovalev A. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Skidanov R. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Soifer V. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

We considered a new three-parameter family of rotating asymmetric Bessel-Gaussian beams (aBG-beams) with integer and fractional orbital angular momentum (OAM). Complex amplitude of aBG-beams is proportional to a Gaussian function and to n-th order Bessel function with complex argument. These beams have finite energy. The asymmetry ratio of the aBG-beam depends on the real parameter c ≥ 0. For c = 0, the aBG-beam coincides with the conventional radially symmetric Bessel-Gaussian beam, with increasing c intensity distribution of the aBG-beam takes the form of Crescent. At c >> 1, the beam is widening along the vertical axis while shifting along the horizontal axis. In initial plane, the intensity distribution of asymmetric Bessel-Gaussian beams has a countable number of isolated zeros located on the horizontal axis. Locations of these zeros correspond to optical vortices with unit topological charges and opposite signs on different sides of the origin. During the beam propagation, centers of these vortices rotate around the optical axis along with the entire beam at a non-uniform rate (for large c >> 1): they will rotate by 45 degrees at a distance of the Rayleigh range, and then by another 45 degrees during the rest distance. For different values of the parameter c zeros in the transverse intensity distribution of the beam change their location and change the OAM of the beam. Isolated intensity zero on the optical axis corresponds to an optical vortex with topological charge of n. Laser beam with the shape of rotating Crescent has been generated by using a spatial light modulator.
Theoretical and an experimental research of polarizing transformations in uniaxial crystals for generation cylindrical vector beams of high orders
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Khonina S. ,   Samara State Aerospace University, Kotlyar S. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Alferov S. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

We analytically and numerically investigate formation of cylindrical vector beams by birefringent crystal in accordance with two schemes: with one combined focus, and with two focuses. In the case with two focuses at presence of a vortical phase in incident beam with circular polarization in one of focuses the radially-polarized distribution is generated, and in another - azimuthally-polarized. The results are generalized on a case of formation radially- and аzimuthally-polarized laser beams of the higher orders. Experiments with a crystal of Icelandic spar confirm results of simulations.
Using photonic crystal nanobeam cavities for integration of optical signal
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Kazanskiy N. ,   Samara State Aerospace University, Serafimovich P. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

In this paper we propose and numerically investigate an all-optical temporal integrator based on a photonic crystal cavity. We show that an array of photonic crystal cavities enables high-order temporal integration. The effect of the value of the cavity’s free spectral range on the accuracy of the integration is considered. The influence of the coupling coefficients in the resonator array on the integration accuracy is demonstrated. A compact integrator based on a photonic crystal nanobeam cavity is designed, which allows high-precision integration of optical pulses of subpicosecond duration.
Analytic design of refractive optical elements generating one-parameter directivity diagram
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Dmitriev A. ,   Samara State Aerospace University, Doskolovich D. ,   Samara State Aerospace University, Doskolovich L. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Kazanskiy N. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

Design of refractive surface generating a one-parameter directivity diagram is considered for the case of collimated incident beam. Calculation of optical element generating a directivity diagram with an arbitrary shape is reduced to sequential solution of two explicit ordinary differential equations. The optical elements generating one-parameter directivity diagrams in the form of a line-segment, an arc, and a combination of two arcs are designed. The results of simulations demonstrate high performances of the designed optical elements.
Spatial and temporal characteristics of a four-wave radiation converter in a transparent medium based on electrostriction and dufour effect
Authors:   Samara State University, Vorobyeva E. , Ivakhnik V. ,   Samara State University, Savelyev M. ,   Samara State University
Published: September 2016

Dynamics of spatial spectrum of the object wave has been analyzed for four-wave radiation converter in an optically transparent medium. It has been shown, that such four-wave radiation converter performs filtering of high spatial frequencies. Over time the spatial frequency bandwidth cut out by four-wave radiation converter decreases leaving the steady-state value.
Reflected four-zones subwavelenghth mictooptics element for polarization conversion from linear to radial
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Nalimov A. ,   Samara State Aerospace University, O'Faolain L. ,   Physics and Astronomy School of St. Andrews University, Stafeev S. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Shanina M. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Kotlyar V. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

A four zone subwavelength binary diffraction optical micro element (size of 100x100 mkm) for polarization transformation from linear to radial was calculated and designed. A grating period was equal to 400 nm, a height of the element was equal to 110 nm in a gold film for a wavelength of 633 nm. Simulation by FDTD method and Rayleight-Zommerfeld integral shown, that despite only four zones used for polarization transformation to four different angles there are radial polarized light beam in the far field with smooth angle dependence on the beam circle observation position. Experimentally shown that in the near field, depending on the direction of the axis of the polarizer on the output light are two zones 4-zone trace element for one or the other diagonal, which proves the presence of radial polarization in the reflected beam.
Synthesis of metal materials nanoporous structures with cyclic elasto-plastic deformation under laser treatment using radiation focusators
Authors:   Samara State Aerospace University, Murzin S.
Published: September 2016

The synthesis method of metal materials nanoporous structures formation with cyclic elasto-plastic deformation under laser treatment was developed. The studies of the alloy structure with scanning electron microscopy revealed the following. During various operating modes microcavities of different shapes were formed in the material surface layer depending on the pulse intensity of laser treatment with thermal cycling of copper-zinc L62 alloy: from globular up to 10 µm with peaks and cavities to elongated teardrop and wedge up to 10 µm and length of more than 50 µm. The submicropores were formed during investigated range of exposure modes in L62 brass with a characteristic size more than 1 µm, and during more intense modes - with a width less than 1 µm and a length of more than 20 µm. The study of the copper-zinc alloy L62 fine structure showed microcavities of elongated teardrop and wedge shapes and taper at their edges to form elongated nanoscale channel having width of not more than 100 nm and a length of 10 µm after laser processing with thermal cycling.
Information technology for digital terrain model reconstruction from stereo images
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Fursov V. ,   Samara State Aerospace University, Goshin Ye. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

This paper considers an information technology of digital terrain model (DTM) reconstruction from the pair of stereo images. For the case when the camera parameters are known, image matching algorithms based on epipolar constraints are thoroughly considered. In the matching we use weight coefficients as a penalty function for distance from the matching point to the epipolar line. Implementation of the technology when cameras’ parameters are not known is also considered. At the initial stage the problem of identification of the fundamental matrix from the corresponding points is solved. The major advantage of the proposed technology is the lack of the image rectification stage. This improves the reliability of the matching. The results of the proposed technology application for the DTM reconstruction from remote sensing stereo images are given.
An algorithm for city transport arrival time estimation using adaptive elementary predictions composition
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Agafonov A. , Myasnikov V. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

The problem of precise arrival time of public transport is considered in this paper. There is proposed a new prediction algorithm based on adaptive composition model using elementary prediction. A small number of adaptive parameters characterizes each elementary prediction algorithm. Adaptability means that parameters of the constructed compositions depend on a number of control parameters of the model, which includes the following factors: weather conditions, traffic density, driving dynamics, prediction horizon, etc. Adaptability is achieved by introducing a hierarchical decomposition range of control parameters used in regression tree. We made experimental investigations on real routes of city public transport in Samara to evaluate the prediction accuracy of the proposed algorithm. We also explain the advantages of the proposed solution in comparison with existing ones.
On the diffraction of an optical beam by a phase shifted bragg grating
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Bykov D. ,   Samara State Aerospace University, Doskolovich L. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

Diffraction of a 3D optical beam from a resonant multilayer structure (phase-shifted Bragg grating) is considered. It is shown that the said structure enables optical computation of the spatial Laplace operator of the electromagnetic field components of the incident beam. The computation of the Laplacian is performed in reflection at normal incidence. Presented numerical results demonstrate high quality of the Laplace operator computation. The beam transformation performed in transmission is also investigated.
Hermite-gaussian laser beams with orbital angular momentum
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Kotlyar V. ,   Samara State Aerospace University, Kovalev A. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Porfirev A. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

We consider vortex Hermite-Gaussian modes (VHG-modes) with their complex amplitude being proportional to an n-th order Hermite polynomial dependant on a real parameter a. When |a| < 1, there are n isolated intensity nulls on the horizontal axis in the beam’s cross-section. These nulls generate optical vortices with a topological charge of +1 (a <0) or -1 (a > 0). If |a| > 1, the VHB-mode has analogous isolated nulls on the vertical axis. When |a| = 1, all n isolated nulls appear on the optical axis in the center of the beam and generate an n-th order optical vortex. In this case, the VHG-mode coincides with a Laguerre-Gaussian mode of order (0, n). For a = 0, the VHG-mode coincides with a Hermite-Gaussian mode of order (0, n). We calculate the orbital angular momentum of the VHB-modes, which depends on a parameter a and varies from 0 (at a = 0 and a → ∞) to n (at a = 1).
Spatio-temporal instabilities in large aperture lasers
Authors:   Samara State Aerospace University, Anchikov D. , Krents A. ,   Samara State Aerospace University,   Samara Branch of the Lebedev Physical Institute, Russian Academy of Sciences, Molevich N. ,   Samara State Aerospace University,   Samara Branch of the Lebedev Physical Institute, Russian Academy of Sciences, Pahomov A. ,   Samara State Aerospace University,   Samara Branch of the Lebedev Physical Institute, Russian Academy of Sciences
Published: September 2016

The paper is devoted to the theoretical investigation of spatiotemporal dynamics of large aperture class B lasers. The linear stability analysis of spatially homogeneous generation is carried out. It is shown that in such lasers the wave instability is realized, the bifurcation diagrams are constructed. The numerical simulation of spatiotemporal dynamics of the laser confirms the linear analysis results. The nonlinear stage of development of the perturbation demonstrates switching between different spatial modes.
THE SOLUTION OF AN EXPANDED PULSE – PROPAGATION EQUATION IN OPTICAL FIBERS FOR COMPETING NONLINEARITY
Authors:   Samara State Aerospace University, Alimenkov I. , Pchelkina Y. ,   Samara State Aerospace University
Published: September 2016

Solutions of the expanded pulse-propagation equation are derived in elementary functions in optical fibers for competing nonlinearit.
Study of the broadband radiation intensity distribution formed by diffractive optical elements
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Karpeev S. ,   Samara State Aerospace University, Alferov S. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Khonina S. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Kudryashov S. ,   Lebedev Physical Institute of Russian Academy of Sciences
Published: September 2016

The results of study of the chromatic properties of the DOE for controlling the laser ablation are presented. Both the effects of the DOE-fabrication-related deviation of the designed wavelength and the spectrum broadening due to short pulse duration are considered. The first phenomenon is investigated experimentally in a model with a continuous laser, while the second is investigated in real ablation of metal films deposited on a dielectric substrate. It is shown that the deviation from the designed wavelength can be used to perform a desired transformation of the focal area. The phenomena associated with the spectrum broadening do not lead to any significant effects for the selected parameters of the laser beam.
Near-duplicate image recognition based on the rank distribution of the brightness clusters cardinality
Authors:   Institute of Cybernetics, National Research Tomsk Polytechnic University, Nemirovskiy V. , Stoyanov A. ,   Institute of Cybernetics, National Research Tomsk Polytechnic University
Published: September 2016

In this paper the usage of multi-step segmentation for near-duplicate image recognition is investigated. The clustering of image pixels brightness is used for segmentation. The clustering is realized by means of a recurrent neural network. The search pattern based on the rank distributions of the brightness clusters cardinality is suggested. Experimental results on the near-duplicate image recognition based on the application of the suggested search pattern are given. It is shown that the use of a multi-step segmentation and rank distributions of the brightness clusters cardinality allows one to successfully recognize the duplicates, which are received by a considerable visual distortion of the original image or by the change of image scale.
Nonlinear filtering with adaptation to local properties of the image
Authors:   Penza State University, Shcherbakov M. , Panov A. ,   Penza State University
Published: September 2016

Different approaches to the construction of digital nonlinear filters that operate by use of local image properties are offered. Structures of nonlinear filters with variable nonlinear-component weight and parametric adaptation are considered. The effectiveness of the proposed methods of filtering is illustrated by the examples of the additive Gaussian and impulse noise suppression.
A method for extracting watermarks from textured printed documents
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Sergeyev V. ,   Samara State Aerospace University, Fedoseev V. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

In this paper, we propose a method for extracting latent images (watermarks) embedded into a regular (two-dimensional quasi-periodical) texture of printed document image. The method includes the following steps: spectral analysis of the input image, synthesis of Gabor filter bank, multichannel Gabor filtering of the image that forms textural feature fields, and finally, multichannel segmentation of them. A number of examples show the operability and potential effectiveness of the method.
Generalized discrete orthogonal sine-cosine transform
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Kasparyan M. ,   Samara State Aerospace University
Published: September 2016

We introduce a generalized sine-cosine transform (GSCT). Analytical conditions of orthogonality of these transformations are derived. A theorem that allows one to find the relation between the GSCT coefficients in the orthogonal case is proven. Fast algorithms for computing the GSCT are considered and their complexity is analyzed.
Multi-sensor systems for monitoring access to restricted areas: capabilities of the intrusion detection video analytical channel
Authors:   Siberian State Automobile-Road Academy, Epifancev B. , Pyatkov A. ,   LLC”MAGMA-computer”, Kopeykin S. ,   Siberian State Automobile-Road Academy
Published: September 2016

The analysis of research publications dealing with security of critical facilities and their protection from terrorist threats suggests that the multisensor systems proposed in the literature need to be supplemented with a video analytical system to enhance the reliability of detecting the intrusion to the restricted access area and recognition of intruders' intentions. An algorithm for solving the first part of the problem, based on the implementation of the principle of accumulation, is proposed. The issue of recognizing the intruders' intentions is partially addressed. The probabilities of an error of the first and second kind for the proposed intrusion detection algorithm are estimated.
Influence of the pump wave rotation and divergence on the spatial selectivity of a four-wave radiation converter in a transparent two-component medium
Authors:   Samara State Aerospace University, Ivakhnik V. , Savelyev M. ,   Samara State Aerospace University
Published: September 2016

The spatial selectivity of the degenerate four-wave radiation converter in a transparent two-component medium based on the electrostriction and Dufour effect has been analyzed as a function of the rotation and divergence of pump waves. Expressions connecting most efficiently the converted spatial frequency bandwidth with the rotation angle and divergence of pump waves has been obtained.
Thermo-optical aberrations of radially symmetric diffractive optical elements
Authors:   JSC 'Rostov Optical-Mechanical Plant', Levin I.
Published: September 2016

Analytical relations that define the temperature dependence of the third-order aberration coefficients for a radiaplly symmetric diffractive optical element were derived. Also, a condition for eliminating thermal defocusing in a diffractive-refractive singlet was obtained. Possibilities of correcting aberrations in a wide temperature range for a single diffractive optical element and diffractive-refractive singlet were analyzed.
Design of an optical divider for ‘smartlink connection’ with use of SLA and FDM 3D-printing technology
Authors:   Scientific and Technological Center of Physics of Information «Introfizika», Ltd, Nikitin V. , Semyonov E. ,   P. A. Solovyov Rybinsk State Aviation Technical University, Solostin A. ,   Scientific and Technological Center of Physics of Information «Introfizika», Ltd, Sharov V. ,   P. A. Solovyov Rybinsk State Aviation Technical University, Chayka S. ,   Scientific and Technological Center of Physics of Information «Introfizika», Ltd
Published: September 2016

We conducted a theoretical study of the development of optical signal dividers for two-dimensional arrays of VCSEL-lasers and PIN photodiodes used in transceivers of full duplex ‘Smartlink connections’ with the constituent components fabricated by 3D printing. A multi-channel optical signal divider for full duplex ‘Smartlink connections’ that can be fabricated using 3D printing technologies, such as SLA (Stereolithography) and FDM (Fused Deposition Modeling), was designed.
Modeling the ‘smartlink connection’ performance
Authors:   Scientific and Technological Center of Physics of Information «Introfizika», Ltd, Nikitin V. , Semyonov E. ,   P. A. Solovyov Rybinsk State Aviation Technical University, Solostin A. ,   Scientific and Technological Center of Physics of Information «Introfizika», Ltd, Sharov V. ,   P. A. Solovyov Rybinsk State Aviation Technical University, Chayka S. ,   Scientific and Technological Center of Physics of Information «Introfizika», Ltd
Published: September 2016

The mathematical model ‘Smartlink connection’ has been extended to include the signal propagation through physical links, signal blurring, and several mechanisms of intensity loss as the signal travels through an optical fiber. Based on this mathematical model, we have developed the software to implement and simulate the circuit-switching and self-healing functions. In the experiments conducted with use of the developed software we studied the self-healing properties of the ‘Smartlink connection’ and evaluated optimal characteristics for the fabrication of a multi-channel signal divider.
Sharp focusing of light using a planar gradient microlens
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Nalimov A. ,   Samara State Aerospace University, Kotlyar V. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

It is shown numerically that using planar gradient microlenses, the coherent radiation can be focused in a narrow line of width λ/38 and length λ/5.5. The efficiency of focusing is 22%. A slitted photonic-crystal lens retains the properties of sharp focusing of light characteristic of a gradient lens. Substitution of the gradient lens by a photonic-crystal analogue synthesized in a silicon was found not to degrade the characteristics of the lens substantially. In this case, we observed a reduction of side lobes near the focal spot and a 30.2% increase of the focusing efficiency.
Spectral features of spontaneous four-wave mixing in tapered nanofibers
Authors:   E. K. Zavoisky Kazan Physical-Technical Institute (KPhTI) of Kazan Scientific Center of the Russian Academy of Sciences, Shukhin A. , Kalachev A. ,   E. K. Zavoisky Kazan Physical-Technical Institute (KPhTI) of Kazan Scientific Center of the Russian Academy of Sciences,   Kazan Federal University
Published: September 2016

Features of biphoton states generated via spontaneous four-wave mixing in tapered nanofibers are studied. The spectral amplitude of a biphoton field is calculated and the effect of interference of the biphoton field in such structures is discussed. The effect of nanofiber environment on the spectral amplitude of the biphoton field is investigated.
Resonant photonic-crystal structures with a diffraction grating for refractive index sensing
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Kadomina E. ,   Samara State Aerospace University, Bezus E. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Doskolovich L. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

A new planar configuration of an optical refractive index sensor based on the excitation of Bloch surface waves and containing a diffraction grating and a photonic crystal is proposed and numerically investigated. The structure under analysis is compared with the conventional sensor based on the Kretschmann configuration for two varying parameters: the angle and wavelength of incident light. The results of the study may find application in the design of novel on-chip refractive index sensors and spectral filters.
Injectional multilens molding parameters optimization
Authors:   Image Processing Systems Institute, Russian Academy of Sciences, Kazanskiy N. ,   Samara State Aerospace University, Stepanenko I. ,   Samara State Aerospace University, Khaimovich A. ,   Samara State Aerospace University, Kravchenko S. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Byzov E. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University, Moiseev M. ,   Image Processing Systems Institute, Russian Academy of Sciences,   Samara State Aerospace University
Published: September 2016

A technique for controlling and optimizing injection molding parameters by numerical simulation is proposed. Using this method for an optical element designed for roadway lighting, multilens molding quality criteria have been defined. Optimal parameters for lens manufacturing have been determined. Based on these parameters, a polycarbonate multilens has been made with an absolute tolerance equal to 0.01 mm.
Characterization of the surface relief of film diffractive optical elements
Authors:   Lomonosov Moscow State University, Kaminskaya T. , Popov V. ,   Lomonosov Moscow State University, Saletsky A. ,   Lomonosov Moscow State University
Published: September 2016

The surface relief of film reflective diffractive optical elements (DOE) has been characterized by atomic force microscopy. The elements under study were fabricated using a variety of microfabrication techniques: traditional laser recoding of reflection rainbow holograms, Dot matrix and Kinemax technologies, and e-beam lithography. The influence of these technologies on the relief characteristics has been estimated. It has been shown that the choice of such technologies is defined by the necessity to obtain corresponding optical characteristics of diffractive optical elements.
Parameterization of the nonlinear Greham predictor for digital image compression
Authors:   Samara State Aerospace University, Gashnikov M.
Published: September 2016

Parameterization of the nonlinear Greham predictor is performed for a digital image compression method based on the differential pulse code modulation. The predictor automatically selects different methods for calculating each pixel in the image based on the availability and intensity of that pixel contour. A fast learning procedure that optimizes the prediction parameters is performed before the actual compression. In the course of optimization, the minimum sum of absolute values of prediction errors is provided. For this purpose, a recursive procedure is used, whose computational complexity is independent of the image size. The estimation of the computational complexity of the proposed predictor is conducted. To study the predictors computational experiments are carried out on real images. A gain the proposed predictor offers in terms of the root mean square error when compared with the prototypes is demonstrated. In addition, a gain that the compression method based on the differential pulse code modulation with the proposed predictor has over the JPEG compression method in terms of the maximum error is demonstrated.
Method for the reliable shortest path search in time-dependent stochastic networks and its application to GIS-based traffic control
Authors:   Samara State Aerospace University, Agafonov A. ,   Image Processing Systems Institute, Russian Academy of Sciences, Myasnikov V. ,   Samara State Aerospace University,   Image Processing Systems Institute, Russian Academy of Sciences
Published: September 2016

A reliable shortest path problem in time-dependent stochastic networks is considered in this paper. We develop and research a method for reliable routing that uses actual and forecast information of traffic flow parameters. We compare the performance of the proposed algorithm with that of a well-known algorithm on a real traffic network in the city of Samara, Russia. On the basis of computing experiments it is shown that while being a bit more computationally challenging, the proposed method increases the possibility of successfully solving the shortest path problem in a time-dependent stochastic network.
Generating a perfect optical vortex: comparison of approaches
Authors:   Image Processing Systems Institute оf RAS, – Branch of the FSRC “Crystallography and Photonics” RAS, Kovalev A. ,   Samara National Research University, Kotlyar V. ,   Image Processing Systems Institute оf RAS, – Branch of the FSRC “Crystallography and Photonics” RAS,   Samara National Research University, Porfirev A. ,   Image Processing Systems Institute оf RAS, – Branch of the FSRC “Crystallography and Photonics” RAS,   Samara National Research University
Published: September 2016

We derived exact analytical relationships to describe the complex amplitude of a perfect optical vortex generated by means of three different optical elements, namely, (i) an amplitude-phase element with the transmission function proportional to a Bessel function, (ii) an optimal phase element with transmission equal to the sign function of a Bessel function, and (iii) a vortex axicon. The doughnut intensity was shown to be highest when using an optimal phase element. The vortex-axicon-aided intensity ring was found to be about twice as wide as when generated using two other elements under analysis. Thus, the optimal filter was shown to be best suited for generating a perfect optical vortex. Simulation results were shown to corroborate theoretical predictions, with the experiment being in agreement with theory and simulation.
Spatial selectivity of the four-wave radiation converter in a transparent two-component medium in a scheme with concurrent pump waves
Authors:   Samara National Research University, Ivakhnik V. , Savelyev M. ,   Samara National Research University
Published: September 2016

Spatial characteristics of the degenerate four-wave radiation converter in a liquid containing nanoparticles were studied using a scheme with concurrent pump waves. The phase matching condition was shown to determine the general form of the spatial spectrum amplitude of the object wave, with the electrostriction phenomenon and Dufour effect shown to cause the emergence of dips in the spatial spectrum amplitude, with the dip positions corresponding to the propagation directions of the pump waves. The relationship between characteristics of the dips and the pump wave parameters were obtained.
Geometric-optical calculation of the focal spot of a harmonic diffractive lens
Authors:   Image Processing Systems Institute оf RAS,– Branch of the FSRC “Crystallography and Photonics” RAS, Kharitonov S. ,   Samara National Research University, Volotovsky S. ,   Image Processing Systems Institute оf RAS,– Branch of the FSRC “Crystallography and Photonics” RAS, Khonina S. ,   Image Processing Systems Institute оf RAS,– Branch of the FSRC “Crystallography and Photonics” RAS,   Samara National Research University
Published: September 2016

The work is devoted to the study of the point spread function of a harmonic diffractive lens illuminated by non-monochromatic radiation using a hybrid geometrical and wave optics approach.
RONALD G. MICETICH (1931-2006): A Scientific Career
Authors: Edward E. Knaus Takehito Yajima  and
Published: September 2016

RONALD G. MICETICH (1931-2006): A Scientific Career
A produção em economia da saúde no Brasil: estudo bibliométrico de 1988-2013
Authors: Silva Andreza Da , Geremia Daniela Savi , Germani Alessandra Regina Muller
Published: September 2016

A Economia da Saúde (ES) é uma área de conhecimento que tem apresentado nas últimas décadas importantes avanços para a melhoria organizacional e estrutural da gestão pública do Sistema Único de Saúde (SUS). Este estudo bibliométrico teve como objetivo analisar as características da produção de artigos científicos relacionados à ES publicados no período de 1988 a 2013 nas bases de dados SCIELO, LILACS e MEDLINE, Brasil. Foram utilizados os operadores boleanos and e or no cruzamento de palavras-chave, escolhidas a partir dos cinco eixos centrais de pesquisa: a) Saúde e Desenvolvimento Econômico; b) Regulação Econômica em Saúde; c) Alocação de Recursos; d) Eficiência das ações e Serviços de Saúde; e, e) Financiamento das Ações e Serviços de Saúde, estas também foram utilizadas para categorização e análise. A amostra analisada contou com um total de 82 artigos. Os resultados apontam as fragilidades na produção científica, principalmente no eixo B e D e apresentaram predominância nos eixos C e E, os periódicos de maior publicação foram aqueles com maior qualificação na Saúde Coletiva.  Há predomínio nas publicações provenientes da região Sudeste. A ES representa uma área interdisciplinar que carece de políticas de incentivo em pesquisas que desenvolvam novos conhecimentos e práticas de gestão pública do SUS e estimulem o processo de consolidação desta área de conhecimento.
O DEBATE RECENTE SOBRE AS POLÍTICAS PÚBLICAS: o caso da intersetorialidade numa perspectiva compreensiva.
Authors: Carvalho Rafael Nicolau , Cavalcanti Patrícia Barreto
Published: September 2016

O objetivo do artigo é analisar a estratégia da Intersetorialidade a partir da contribuição da sociologia compreensiva; definir o atual estágio de discussão sobre o tema. Como metodologia, usa a pesquisa bibliográfica, tendo em vista que a mesma é largamente utilizada nos estudos exploratórios e descritivos, quando o objeto de analise é pouco estudado, dificultando o levantamento de hipóteses ou de novas interfaces.  O texto está organizado em uma introdução, que faz um levantamento sobre os pressupostos das políticas públicas, e duas seções: a primeira, “o debate sobre a Intersetorialidade”, mapeia o surgimento da temática, os principais conceitos, modelos analíticos e tipologias.  A segunda, “contribuição da sociologia compreensiva: pensando o problema”, discute as possibilidades de “aplicação” da metodologia compreensiva para analisar alguns aspectos sobre a temática, que podem contribuir com um modelo de análise de políticas públicas.