Summaries of the Issue
OPTICAL AND OPTICAL ELECTRONIC SYSREMS. OPTICAL TECHNOLOGIES
EFFECT OF HALOGENS ON SPECTRAL AND PHOTOSENSITIVE PROPERTIES OF PHOTO-THERMO-REFRACTIVE GLASSES Akishina Ekaterina , Lazareva Kseniya, Nikonorov Nikolay V. , Sidorov Alexander Ivanvich, Victor Tsekhomsky
Effect of bromine and fluorine on spectral and photosensitive properties of photo-thermo-refractive glasses has been investigated. Mechanism of photo-thermo-induced glass crystallization has been proposed. According to experimental results it has been suggested that colloid silver particles are nucleation centers under the temperature close to the glass transformation temperature. Liquid phase consisted of silver bromide with attenuated sodium fluoride forms around these particles. Nanocrystals with the complicated structure of AgBr-NaF exude on the colloid silver surface during the cooling.
FRACTAL DIMENSION CALCULATING OF REGULAR FRACTALS BY FRAUNHOFER DIFFRACTION Zinchik Alexander A, Yana Muzychenko, Smirnov Alexander Vitalievich, Stafeev Sergey K.
The numerical simulation of Fraunhofer diffraction of geometric fractals was made and the original algorithm for calculating the fractal dimension of the regular fractal on the diffraction pattern was suggested. As an example, the diffraction patterns from the following geometrical fractals were used: Sierpinski carpet, Vishek fractal, Koch snowflake. A comparison of the fractal dimension values derived from the numerical experiment with the theoretical values was made. For the generation of fractals with the level m = 6 the difference between these values does not exceed 1.5%.
RESEARCH OF THE MICROSCOPE OBJECTIVE BY THE COMPUTER IZOPHOTOMETRY METHOD WITH ACCUMULATION Ле З. Т., Kirillovsky Vladimir K.
The article is devoted to the computer izophotometry method of PSF and the corresponding equipment for testing the image quality of a micro objective by measurement PSF by a direct method with subsequent calculation of MTF and energy concentration function. From the optical system user’s point of view, the major problem of the testing and certification is measuring of the image real structure and comparison of the received result to the calculated characteristics. Data processing is made in real time that allows receiving results in the shortest time, thus PSF of the test-object is defined with transfer of the image thin diffraction structures, and the three-dimensional graph of PSF, that raises results reliability, is displayed.
IMITATING MODEL OF AN OPTICAL-ELECTRONIC CEILOMETER Demin Anatoly V., Konstantin Konstantinov
The article deals with the simulation method of an optic-electronic complex for measuring the cloud base height by scanning activities. The simulation model of measuring the cloud base height is developed and approved.
LASER SYSTEMS AND LASER TECHNOLOGIES
FORMATION OF METAL SILICIDES FILM COVERINGS BY METHODS OF LOCAL LASER TRANSFER AND ANNEALING Veiko Vadim Pavlovich, Vasiliy Kasatkin, Victor Matyzhonok, Petrov Andrei Anatolievich, Elena Shakhno
Films of metal silicides, being low-energy-gap semiconductors, represent rather perspective material for creation of termogauges. The possibility of film coverings reception from silicides of chrome and iron by methods of local laser transfer and laser annealing is investigated in the paper. Film coverings of metal silicides on various substrates are received and their electric parameters are investigated. Dependence of film coverings properties on their drawing conditions is defined.
LASER-INDUCED FORMATION OF MICRO-ELEMENTS ON THE BASE OF GLASS-CERAMICS Boris Novikov, Maxim Shadchin
Local modification of glass-ceramics phase statement is perspective technique for micro-elements formation. Concepts of laser-induced phase-structure modification of two glass-ceramics types - photosensitive glasses and pyroceramics – are described. Realization of this technology by laser irradiation of different wavelength is reported. Possibility of various micro-elements formation at wide range of their parameters is demonstrated.
INVESTIGATION OF HUMAN TOOTH ENAMEL REMOVAL EFFICIENCY BY SINGLE MODE RADIATION OF YAG: ER LASER Belikov Andrey V., Ekaterina Zholobova, Alexei Skripnik, Tatyana Strunina
Dynamics of human tooth enamel removal efficiency by TEM00 radiation of YAG: Er laser is investigated. The spatial−power parameters of single mode radiation of free−running YAG: Er laser able to form craters in a tooth with aspect ratio higher than 10:1 are experimentally determined.
MATERIALS TECHNOLOGY AND NANOTECHNOLOGIES
DISTRIBUTION FUNCTION СOMPUTATION FOR SPHERICAL PARTICLES SIZE ON THE BASIS OF SMALL ANGLE X-RAY SCATTERING Ekaterina Ukhanova, Smirnov Alexander Vitalievich, Boris Fedorov
The method for distribution function computation of the spherical particles size is evaluated on the model curves. This method is based on the direct integral transformation of the entire small angle X-ray scattering indicatrix. The efficiency of the method is confirmed, its resistance to the statistical noise is tested and the distortion caused by the limitation of the experimental scattering curve is estimated. Experimental curves of small angle scattering are obtained for the composite materials formed by nanosized diamond particles in pyrocarbon matrix. The distribution function of nanoparticles size is calculated by means of this method. The correlation between the distribution function and the thickness of the pyrocarbon layer is found.
SMALL-ANGLE X-RAY DIFFUSE SCATTERING RESEARCH OF MINERAL FINE-DISPERSED FRACTIONS Smirnov Alexander Vitalievich, Boris Fedorov, Anton Simakov
We investigated surface mechanical destruction of six minerals: albite, labradorite, quartz, diamond, galena and copper-glance. Small-angle X-ray scattering curves have been obtained for the minerals. It was shown that the surfaces of fragile minerals were absolutely plane in the wide range of dimensions (from 10 nm to 150 nm). At the same time the surface of the malleable minerals (galena and copper-glance) is much rougher in the same range of dimensions. The Guinier - plot gives the particle radius of galena ~ 48 nm.
COMPUTER SYSTEMS AND INFORMATION TECHNOLOGIES
CHOICE AND JUSTIFICATION OF EFFECTIVENESS CRITERION IN DISTRIBUTED DATABASES DESIGN Veniamin Novoselsky, Tatyana Pavlovskaya
Distributed database design lifecycle is considered, design phases are described. Problem of distributed database design is formulated based on the mutual interdependency between fragmentation phases, allocation phase and query execution plan of each request. Choice and justification of effectiveness criterion in distributed database design is done. Authors consider criterion components and explore the dependence on various parameters.
THE CONVERTER OF LINEAR MOVINGS WITH PSEUDORANDOM CODE SCALES ON THE BASIS OF RECALCULATION SCHEME Ozhiganov Aleхander A., Zhuan Chzhipehn
Principles of construction of single-track pseudorandom code scales are examined in the article for the transformers of the linear moving, and also the structure of transformer of pseudorandom сode is offered in an usual binary code.
Two approaches of precise time provision in embedded systems with low-precise time requirements are considered in this article: time calibration and synchronization. The first approach offers exact technical decision, the second approach offers method of time synchronization. Much attention is given to automation of time adjustment process within offered decisions.
INFORMATION SECURITY METHODS AND SYSTEMS
INFORMATION SECURITY METHODS AND SYSTEMS CONSTRUCTION PRINCIPLES APPLICATION OF EFFECTIVE USER INTERFACES OF ELECTRONIC DOCUMENT CIRCULATION SYSTEMS Dmitriy Korablyov
Main construction principles of the effective user interface of electronic document circulation systems are described in the article. Application techniques of principles are given. Positive embodiment of designing principles in existing electronic document circulation systems is considered.
ROBUSTNESS INCREASE OF DISCRETE COSINE TRANSFORM ALGORITHMS AGAINST FREQUENCY DOMAIN ATTACKS Prokhozhev Nikolai N, Mikhailichenko Olga V, Korobeynikov Anatoliy Grigorievich
This article describes a way to increase a robustness of discrete cosine transform (DCT-based) algorithms. The Koch algorithm is used to show robustness against frequency domain attacks. The article illustrates a relationship between robustness and area of used DCT coefficients. JPEG compression, white noise, filters and resizing are used as external attacks. The ways of robustness increase are considered by optimal decision of embedding domains.
NEW TECHNOLOGIES IN EDUCATION
CREATING OF THE ACTIVE LEARNING TECHNOLOGY ON THE BASIS OF ONTOLOGY MODELING Vladimir A. Gorovoy, Mouromtsev Dmitry I.
The theoretical approaches and an example of the practical realization of a new method of education for e-learning system and self education are given in the article. The principles of active type educational process are defined from the e-learning point of view. The possibilities of ontological modeling and the WEB 2.0 network technologies for creating a new generation of e-learning systems are considered. Scenario of educational process based on the described approach is given.
The article deals with the methods, algorithms and procedures of educational standards design in the field of professional education. Complex multidimensional data analysis methods are considered at the main stages of professional educational standards design.