Electronics

20140708-05
Sensor and actuator nodes for multi-zone demand-controlled ventilation
Marin B. Marinov, Todor S. Djamiykov, Volker Zerbe

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With sensor-based demand controlled ventilation the ventilation rates are controlled through signals from indoor and outdoor air sensors and so better control of the indoor pollutant concentration and lower energy consumption ...  read more

20140708-04
Cost-efficient metallographic preparation methods of electronic components and assemblies
Georgi A. Farkov, Valentin H. Videkov

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Control of the soldering process and failure analysis are an important part of quality assurance at today manufacturers of electronic components and assemblies. Many methods exist – non-destructive and destructive, each ...  read more

20140708-03
Determine the energy of the impulse scheme for electrical excitation laser type “double impulse”
Svetoslav Т. Ivanov, Yanca N. Kissova

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In most lasers with optical excitation essential element of the emitter except the active environment and optical resonator is a converter of electrical energy in the exciting light radiation – gas discharge or halogen ...  read more

20140708-02
Subtraction procedure for drift and tremor removing from ECG: system level synthesis with Compaan
Tsvetan P. Shoshkov, Georgy S. Mihov

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The electrocardiogram (ECG) is often contaminated with interferences such as drift and tremor. The subtraction procedure has proved its efficiency in removing interferences from the ECG. Development process of such device ...  read more

20140708-01
Buck-Boost ZVS DC-DC quasi-resonant converter: design, modeling, simulation and experimentation
Nikolay R. Rangelov, Nikolay L. Hinov

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In the paper work are shown results from researching of a single transistor Buck-Boost ZVS DCDC Quasi-Resonant Converter. Initially an analysis of the electromagnetic processes in the power part of the circuit has been made. ...  read more

20171112-02
Teaching methodology for signature analysis and cyclic redundancy check
Dimiter Badarov

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This article discusses the methods, the tasks and the material base used in the teaching process for students in signature analysis and cyclic redundancy check. The laboratory training is conducted on FPGA programmable logic ...  read more

20170910-03
Plasma sterilization – special features and new approaches in medical applications
Kiril Ivanov

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An overview of the process of sterilization and disinfection is described in this article. Special attention is turn to the currently used technologies, their advantages and disadvantages. Another subject of the topic is the ...  read more

20150102-07
Study of the elements of the photovoltaic system
Dimitar D. Arnaudov, Nikolay L. Hinov, Ivan I. Nedyalkov

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In this paperwork has been made a study of the elements of an off-grid photovoltaic system for power supplying of telecommunication systems and telecommunication modules. The laboratory model is described. The bi-directional ...  read more

20150708-04
Mobile multisensor node for monitoring environmental parameters in urban areas
Marin Berov Marinov

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Air quality is a matter of considerable concern as it affects public health, the environment and the economy of developed countries. Recent research has shown that air pollution can increase the incidence of diseases and impair ...  read more

20150708-03
Photodetector based on electrochemically deposited ZnO and inkjet printed PEDOT:PSS heterojunction
Nikolay Kurtev, Slavka Tzanova, Silvia Schintke

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In this paper we present a new photo-sensible device based on ZnO/PEDOT:PSS heterojunction. The formation of ZnO layer was made by electrochemical deposition of Zn from zinc nitrate solution over a transparent ITO electrode ...  read more