Сучасні проблеми радіоелектроніки, телекомунікацій, комп'ютерної інженерії
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Item A calculation of radio electronic devices own noises in the range of low frequencies(Видавництво Львівської політехніки, 2010) Kolodiy, Zenoviy; Nedostup, Leonid; Kolodiy, AndriyFormula for calculation of own noises level of radio electronic devices in the range of low frequencies.Item The influence of oxygen doping of channel of organic field-effect transistor based on nickel phthalocyanine on the output parameters(Видавництво Львівської політехніки, 2010) Stakhira, Pavlo; Cherpak, Vladyslav; Pakhomov, Georgiy; Volynyuk, Dmytro; Dutchak, Zoya; Hladun, MykhayloThe influence of nickel phthalocyanine (NiPc) thin film doping by oxygen on electric parameters of organic transistor structures of Si/SiO2/NiPc/Au was investigated. The complex analysis of structure and electrical&physical characteristics of thin films of organic low-molecular semiconductor after influence of oxygen during seven days was carried out.Item One-dimensional silicon-based crystals for thermoelectrics(Видавництво Львівської політехніки, 2010) Druzhinin, Anatoly; Ostrovskii, Igor; Kogut, Iurii; Nichkalo, StepanThe review of modern semiconductor thermoelectric materials development and methods of their thermoelectric efficiency enhancement has been conducted. Prospects of practical use of silicon and Si1-xGex solid solutions whiskers and nanowires in thermoelectrics have been estimated.Item Technique of defining the electric resistance of the IC contact pads(Видавництво Львівської політехніки, 2010) Hotra, Zenon; Dyachok, Dmytro; Lob, Yaroslav; Semenyuk, AnatoliyThere are presented the technique and results of defining the electric resistance value of the IC microcontact connection contact pads.Item The mathematical modeling of process of light propagation in liquid crystal planar structures with changing of refraction coefficient(Видавництво Львівської політехніки, 2010) Fechan, A.; Sushynsky, O.; Shymchyshyn, М.; Bashtyk, Ju.; Kotsun, V.This work are dedicated to the mathematical modeling of process of light propagation in liquid crystal planar structures with changing of refraction coefficient.Item Current density distribution on the perimeter of waveguide exciter cylindrical vibrator conductor(Видавництво Львівської політехніки, 2010) Zakharia, YosypOn ground of electrodynamic analysis the surface current distribution nonuniformity on the perimeter of waveguide-exciter cylindrical conductor is found. Considerable influence of current distribution nonuniformity on exciter input reactance is established. It is also showed, that the current distribution on the vibrator perimeter, for conductor radius no greater then 0,07 of waveguide cross section breadth, approximately uniform is.Item Intellectual agent technology and models of co-ordinating management in hierarchical systems(Видавництво Львівської політехніки, 2010) Sikora, Lubomyr; Mounir, Gabsi; Ali, RekikThis paper describes system approaches to the synthesis strategies of the coordinating management of resources streams in power, transport and telecommunication systems are considered in this article.Item Hotelling’s statistic recurent formation(Видавництво Львівської політехніки, 2010) Stepanenko, OlesiaThe synthesis of adaptive filter recurrent forming Hotelling’s statistics is conducted.Item Improving HSDPA indoor coverage and throughput(Видавництво Львівської політехніки, 2010) Bibik, MikhailThe target of the paper is to provide guidelines for indoor planning and optimization using an outdoor-to-indoor repeater or a dedicated indoor system. The paper provides practical information for enhancing the performance of high-speed downlink packet access (HSDPA) in an indoor environment.Item Impulse radio signal processing considering the Internal phase-frequency instability(Видавництво Львівської політехніки, 2010) Hamza, Ali Yousef Alshawabkeh; Teslyuk, Vasyl; Kernytskyy, Andriy; Denysyuk, PavloInformation models for MEMS structures analysis and research subsystem based on Petri nets theory are designed.Item Development and research of system descriptions of architecture processors is with address access in the base of Galois(Видавництво Львівської політехніки, 2010) Humenniy, PetroThis research shows, that possibilities of VIT using makes possible to decrease structure and algorithmic complication to a few degrees. As a consequence such devices will have higher speed and more reliability. Possibility of such special processors and memory devices in view of discrete PLIS crystals realization and massive use of them in computer and telecommunication systems.Item Method of universal algebra construction for image processing(Видавництво Львівської політехніки, 2010) Vorobel, RomanNew universal algebra and method for its construction is described. Operations of addition and multiplication by real scalar are defined for interval (-M, M), where M>0. New algebra generalizes known algebraic structures of Jourlin-Pinoli and Patrascu. The using of triangular norms and the laws of human visual system (HVS) is the base of proposed approach.Item The propagation of polarized light in the biological tissues models(Видавництво Львівської політехніки, 2010) Arkhelyuk, Alexandr; Podkamen, LeonidThe experimental investigation results of the surface and volumetric scattering regularities of polarized radiation by a layer of orientation particles are presented. The investigations are made on the basis of studying the structure and regularities of the components functional dependence of diffuse and mirror reflection matrixes of particles layer (model layer of biological tissue). We used different orientation of particle angles О and scattering angles А for two angles of an irradiation В= 20о and 60о during the experimental investigations. It is shown, that components of the mirror reflection matrixes are more sensitive to the changing of the particles layer orientation angle than the components of its diffuse reflection matrix.Item Modelling of o-Ps “pick-off” annihilation process in nanoporous ceramics for sensor electronics(Видавництво Львівської політехніки, 2010) Klym, Halyna; Kochan, RomanThe modelling of ortho-positronium annihilation processes in nanoporous humidity-sensitive ceramics were performed using the Tao-Eldrup model. It is shown that this model is adequate for modelling “pick-off” annihilation processes in ceramic materials for sensors applications and calculation of the size of their nanopores.Item Expressiveness of time domain features for detecting different types of human movements(Видавництво Львівської політехніки, 2010) Rybina, Kateryna; Ternovoy, Maksym; Dargie, WaltenegusThe usage of wireless activity recognition systems is significant in many applications. The aim of this paper is to show the expressive power of time domain features based on the case study of correlation coefficient feature for detection of the following types of movement: hopping, running, jumping, balancing and skipping. Time domain analyses were applied to acceleration data and a confusion matrix was established as movement classification method.Item Voice over LTE via Generic access (Volga) as a possible solution of mobile networks transformation(Видавництво Львівської політехніки, 2010) Stepaniuk, OlegThis paper is focused on Voice over LTE via Generic Access Network, which concept is to connect the already existing Mobile Switching Centers to the LTE network via a gateway supporting 2G or 3G voice environment.Item Application of the SIP protocol in telecommunication, based on a image transmitting application(Видавництво Львівської політехніки, 2010) Marzec, Michal; Sakowicz, Bartosz; Mazur, Piotr; Napieralski, AndrzejThis paper presents the idea of convergence of the IT and telecommunication worlds, based on an example application. The program has been developed in Microsoft Visual Web Developer 2008 environment. As one of the aims the possibilities of convergence are being described. The example application allows users to communicate by video conference using soft phone on one side and WWW browser on the other, via Internet connection.Item Comparative analysis of software development models for electro-technical systems(Видавництво Львівської політехніки, 2010) Tabunshchyk, Galina; Bragina, TetyanaThe models of software development used for electro-technical systems are observed by the authors. The classification of this models are offered in the article.Item The analysis of transmitting OQPSK signals through AWGN channel(Видавництво Львівської політехніки, 2010) Bondarev, Andriy; Maksymiv, IvanThe simulation method of comparative analysis of radio signals with OQPSK at low signal-to-noise ratio is considered in this paper.Item Methods of creating graphical interfaces of Web applications based on the example of FLEX framework(Видавництво Львівської політехніки, 2010) Dеbinski, Adam; Sakowicz, Bartosz; Kaminski, MarekThe article, by describing features of sample application for project management, presents methods of creating graphical interfaces of modern applications that run in web browser environment. Sample program is written with the use of FLEX Framework and some FLEX supporting tools.