issue 7-8

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

20180708-13
Modelling of E-beam crosslinking of composite hydrogels
Maria Demeter, Ion Călina, Cătălin Vancea, Toni P. Paneva, Elena G. Koleva, Lilyana St. Koleva

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Response Surface Methodology and robust engineering approach were applied for the investigation of preliminary experimental data related to the synthesis of composite biopolymer-based hydrogels via electron beam (e-beam) radiation ...  read more

20180708-12
Dispersed and layered volumetric nanocrystalline materials based on copper and molybdenum condensed from the vapor phase
Nikolai Hrechaniuk, Vera Hrechaniuk, Elena Khomenko, Dmytro Kovalchuk

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The paper presents features of structure formation and phase composition on copper and molybdenum based composite materials, condensed from the vapor phase. Three types of condensed composite materials with thicknesses from ...  read more

20180708-11
Electron beam modification of the Grade 2 titanium surface after ionplasma nitriding
Andrey N. Drobov, Siarhei V. Yurevich, Igar L. Pobol

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The change of structure of Grade 2 titanium subjected to ion-plasma nitriding at 850 ℃ for 5 hours in a gas atmosphere consisting of pure argon at the heating stage, and Ar + N2 in the soaking stage, after electron-beam exposure are investigated.

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 ...  read more

20180708-10
Applied voltage dependence of plasma characteristic for food sterilization using PBII method
Kenichi Watanabe, Ryota Matsuda, Tomonori Tabe, Motoko Hiyama, Kento Sakasegawa, Yuuta Yamamoto, Koji Kakugawa, Takeshi Tanaka

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We used the PBII (Plasma Based Ion Implantation) method with self-igniting plasma and negative high-voltage pulsed power supply only to calculate the ion density inside a formed ion sheath based on a modulation circuit, by ...  read more

20180708-09
Optimum conditions for sterilization of Geobacillus stearothermophilus spores using plasma-based ion implantation
Motoko Hiyama, Koji Kakugawa, Aya Yakushiji, Kenichi Watanabe, Ryota Matsuda, Yoshinobu Tsuchiya, Takeshi Tanaka

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In recent years, substantial research into low-temperature sterilization techniques has been conducted. Plasma-based ion implantation (PBII) is a low-temperature, cost-effective technique for sterilizing medical equipment, ...  read more