year 2020

20200304-full
Issue 3-4, 2020

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 55. No 3-4/2020
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20190304-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE
Takeshi Tanaka, Nobuharu Okamitsu, Takuma Hamada, Kenshi Nishino
 ...  read more

20200304-01
Development of an IoT device using SigFox, ThingSpeak, and MATLAB/Simulink
Takeshi Tanaka, Nobuharu Okamitsu, Takuma Hamada, Kenshi Nishino

Cite as:

We installed a Sigfox antenna at Hiroshima Institute of Technology and acquired basic environmental data via the Sigfox network. The IoT device created by us comprises Sigfox, ThingSpeak, and MATLAB/Simulink, and this configuration ...  read more

20200304-02
Electroencephalography for TV advertisement decomposition
Georgi Tsenov , Stilyan Georgiev, Stanimir Andonov, Valeri Mladenov

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With the introduction of mobile devices with easy to access high processing power, in the late years is possible to perform analysis of bio signals in real time at any place. Such is the case for electroencephalographic signals ...  read more

20200304-03
A study of the efficiency as a usability characteristic in E-learning environment
Maria Todorova, Lilyana Koleva, Elena Koleva

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The world of technology is changing at an extremely fast pace. Covid-19 has given further impetus to modernization in education, and it seems unlikely that schools and universities will continue to function as they did before ...  read more

20200304-04
Cyberlearning and engineering education – survey
Seferin Mirtchev

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The traditional educational research focuses primarily on students’ test scores or obtaining credits, and the learning scientists often deals with knowledge, skills and competencies. The term “cyberlearning” ...  read more

20200102-full
Issue 1-2, 2020

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 55. No 1-2/2020
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20190102-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE
Georgi Petrov, Anushka Stancheva
Problems ...  read more

20200102-01
Problems related to EMC caused by low-altitude flying drones in urban environment
Georgi Petrov, Anushka Stancheva

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Mass electrification of personal transportation vehicles creates prerequisites for massive mobile sources of electromagnetic interference. These is especially strong in dense urban environments. The problem with the introduction ...  read more

20200102-02
Data fusion from different protocols and integrating them into a mesh network for personal assistant of technical manager
Boyan K. Mednikarov, Yordan A. Sivkov, Chavdar I. Alexandrov, Miroslav Y. Tsvetkov, Veselin E. Atanasov, Marinela I. Petrova

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Automatic data collection and decision-making processes are crucial in optimizing production processes. One of the main tasks is to significantly reduce the time and cost of making management decisions, and achieve flexible ...  read more

20200102-03
Investigation of preemptive priority single-server queueing systems with peaked traffic flows
Seferin Mirtchev

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In this article, a model of single-server preemptive priority queueing systems with a peaked arrival process, generally distributed service time and infinite waiting position is described by using the Polya distribution to ...  read more

20200102-04
Big Data Framework overview
Elena Shoikova, Roumen Nikolov, Eugenia Kovatcheva, Boyan Jekov, Lyubomir Gotsev

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This work presents the results of a systematic review about the Big Data Framework. The overview of the meanings of the broad terms Big Data and Data Science is based mainly on NIST Big Data Interoperability Framework (National ...  read more