issue 9-12

20210912-full
Issue 9-12, 2021

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 56. No 9-12/2021
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20120912-full

C O N T E N T S

ELECTRONICS
Georgi I. Kolev
Integrated Smart Home system development 87

Elena G. Koleva, Lilyana S. Koleva, Volodia V. ...  read more

20210912-03
Graphical user interface for simulation of the mechanical properties of a new type of black locust plywood for construction
Lilyana S. Koleva, Asen N. Hristov

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The mechanical properties bending strength and modulus of elasticity in bending of a new type plywood for construction, based on black locust wood, have been investigated in relationship with the bonding technological factors. ...  read more

20210912-02
Process parameter optimization of electron beam melting and refining of titanium
Elena G. Koleva, Lilyana S. Koleva, Volodia V. Dzharov, Boriana S. Spasova

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The mechanical properties bending strength and modulus of elasticity in bending of a new type plywood for construction, based on black locust wood, have been investigated in relationship with the bonding technological factors. ...  read more

20210912-01
Integrated Smart Home system development
Georgi I. Kolev

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This paper presents the process of development of an intelligent remote Smart Home system, which includes the definition of system functionality, the realization challenges and the elaborated solutions. The system is aimed ...  read more

20210912-04
The role of professional digital literacy for the transformation of academic teaching
Mariya Al. Ivanova

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The role of digital literacy of academic teachers on the transformation and flexibility of the university and the learning process in a pandemic is studied. The analysis of the different opinions of the studied authors on ...  read more

20200912-full
Issue 9-12, 2020

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 55. No 9-12/2020
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20200912-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE
Nobuharu Okamitsu, Koichi Miyazono, Takeshi Tanaka
Transmission ...  read more

20200912-01
Transmission of environment data with preliminary secret sharing processing using Sigfox
Nobuharu Okamitsu, Koichi Miyazono, Takeshi Tanaka

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Using the Sigfox network and the Internet, we created Internet-of-Things devices equipped with temperature, humidity, and barometric pressure sensors to measure the environment data. In this study, we developed a way to process ...  read more

20200912-02
Geo-referenced system for air quality monitoring
Kamen Boyadzhiev

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This paper presents a developed system for detecting air pollutants and their concentration and monitoring the ambient environment parameters. The system generates geo-referenced data which is recorded to a local MySQL database ...  read more

20200912-03
Physical modeling of wind energy conversion systems in laboratory conditions
Zahari Zarkov

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The article presents the experience of the author in the area of the physical modeling of wind energy conversion systems (WECS) with different types of electric generators and electronic converters. A small power test benches ...  read more