year 2014

20140102-01
Improvement of the information services by using means of the IT infrastructure library
Mario Ivanov

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In the present paper, the focus is on the process of determining effective key indicators in ITIL (Information Technology Infrastructure Library), and is provided an overview of the most popular key performance indicators. ...  read more

20140304-08
Corporate education for manufacturing (Semiconductors) – creation of a training system and technical textbook
Hiroyuki Izumo, Keisuke Konishi, Rei Wada, Takashi Imagawa, Susumu Kise, Shenji Hatada, Takeshi Tanaka, Shigeo Hirano

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Artner Co., Ltd. is currently dependant on a variety of outsourcing systems that have been implemented with a high degree of technical assistance for the completion of projects. In large scale integration (LSI) design and ...  read more

20140304-07
Neural network based approach for quality improvement of electron beam welding
Elena Koleva, Nikolinka Christova, Georgi Mladenov, Dmitrii Trushnikov, Vladimir Belenkiy

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Neural network models for the dependence of the geometry characteristics of welds from 38Cr2Ni2Mo high-strength steel, obtained at electron beam welding in presence of longitudinal beam deflection oscillations, are estimated. ...  read more

20140304-06
A functional model extension of OMA device management
Ivaylo I. Atanasov, Evelina N. Pencheva

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Machine-to-Machine (M2M) communications allow interworking of smart objects such as sensors, actuators and monitors, and development of innovative applications. Remote entity management provides means of managing M2M device ...  read more

20140304-05
Optimization of the structure and the distribution of the reactive power compensation in the industrial electrical supply systems
Nikolay Matanov

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The compensation of the reactive loads is fundamental for improving the quality of the industrial electrical supply and decreasing the losses of active power in the distribution grids. Regarding energy efficiency, capacitor ...  read more

20140304-04
A linear converter of strain-gauge bridge bidirectional disbalance into frequency deviation
Svilen H. Stoyanov

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The measurement of mechanical force and torque magnitudes by means of strain gauges based on a new method for “transforming resistance into frequency” is the object of investigation in this paper. It presents the development ...  read more

20140304-03
Modelling of step-up DC converter
Vladimir V. Dimitrov, Peter T. Goranov

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In the current paper building on the sound theoretical foundation of state-space methods a model for the boost converter is presented. Replacing some elements in the ideal power convertor with their nonideal equivalent circuits ...  read more

20140304-02
Near-field measurements using low cost equipment for RF device characterization
Radoslav B. Borisov, Kaloyan I. Zlatkov, Plamen I. Dankov

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Near-field electromagnetic scanners are widely used for microwave, antenna and electromagnetic compatibility measurements. The scanner determines the spatial distribution of an electrical quantity provided by a single or multiple ...  read more

20140304-01
Fabrication of flexible hybrid low molecular weight compound/polymer light emitting device by screen printing
Mariya P. Aleksandrova, Irena P. Nestorova

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It is demonstrated successful fabrication of simple bicomponent single layer OLED produced by screen printing. The device exhibits high mechanical stability after 400 cycles of bending. Turn on voltage of 5 V and maximum brightness ...  read more

20140506-61
Analysis and Generalization of Scientific and Educational Information Book in the Field of Nano-Electronics
Victor M. Spivak, Elena G. Koleva, Anna G. Vlasyuk

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In this paper analysis and generalization of the scientific and educational properties of information textbooks on nano-electronics, created from the scientists of the Institute of Electronics at Bulgarian Academy of Sciences, ...  read more