year 2016

20160304-07
Thermophysical simulation of thermoelectric cooling system
Ivaylo Belovski, Boris Evstatiev, Anatoliy Alexandrov

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The main active element in thermoelectric cooling systems is Peltier module. Its action is based on the Peltier effect, which results in the conversion of electrical power into a temperature gradient. This article presents ...  read more

20160304-06
Impulse control of a DC motor with active driver circuit
Ivan P. Tanev, Svetoslav Cv. Ivanov

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This paper describes a study and the results obtained from the implementation of pulse control over a DC motor by means of both a conventional and an active driver for controlling the powerful MOSFET. The studied active driver ...  read more

20160304-05
Radiocommunication systems for the developing countries – the Bulgarian contribution
Veselin B. Demirev

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In the last several months, the world and the global media attention were focused exclusively toward the refugees, going from near east to the developed Central European countries. It was explained, that most of them are economical, ...  read more

20160304-04
Hall sensors action with new interpretation
Siya V. Lozanova, Levon O. Altunyan

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A novel manifestation of the Hall effect in conducting materials, semiconductors included, in the temperature range 77 K – 300 K has been experimentally observed. The nature of this phenomenon is the appearance of magnetically ...  read more

20160304-03
Ethernet based street lighting control system
Stefan Bobev

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Presented an alternative design provides centralized management of street lighting through wired communication between modules. This communication is based on a widespread and generally available in each locality Ethernet ...  read more

20160304-02
Specific occurrences in DC/DC converters used in flyback mode
Tatyana Neycheva, Jecho Kostov

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The flyback commutation mode is usually chosen when capacitor has to be charged to certain high voltage. The power source supplies portions of energy into the field of air gap transformer that are further transferred to the ...  read more

20160304-01
State of the art of structures and main components of hybrid and electric vehicles
Gergana I. Vacheva, Nikolay L. Hinov

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The main objective in this paper is to review the most widely used structural schemes of hybrid and electric vehicles and their basics blocks. The various sources of energy are consistently presented – fuel cells, batteries ...  read more

20160506-58
One versatile MeV-ion beamline for multiple applications
Udomrat Tippawan, Teerasak Kamwanna, Liangdeng Yu, Saweat Intarasiri, Nitipon Puttaraksa, Somrit Unai, Somsorn Singkarat

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A versatile ion beam line based on a 1.7-MV Tandetron tandem accelerator has been established at Chiang Mai University, Thailand in a compact manner for multiple-purpose ion beam applications including analysis, microbeam ...  read more

20160506-57
Simulation of ion implantation for Si using TCAD
Takuma Adachi, Yuki Hirota, Yosuke Nakaguchi, Kota Takahama, Koji Mukai, Masayuki Yamauchi, Nobuharu Okamitsu, Takeshi Tanaka

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To realize further high performance in semiconductor devices, the development of efficient processes and a reduction in the number of trial productions are indispensable. Therefore, the orientation of development plans and ...  read more

20160506-56
Spore-forming bacteria sterilization using plasma-based ion implantation (2nd report)
Koji Kakugawa, Kai Saitoh, Kenya Hayashi, Kazuhiro Shimono, Hiromitsu Noguchi, Yoshinobu Tsuchiya, Takeshi Tanaka

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A main purpose of sterilization is to kill the harmful microorganisms. The spore-forming bacteria which are present in foods frequently cause food spoilage. Although the vegetative cells of those bacteria are sterilized easily, ...  read more