Issue 9-10, 2014

Issue 9-10, 2014

 

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 49. No 9-10/2014
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20140910-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE

Mario Ivanov, Biser Stefanov
Approaching risk management in IT by implementing it in ITIL 2

Kamelia Nikolova
Design and investigations of approximately linear phase Hilbert transformers 10

Ivaylo I. Atanasov
Resource structure for smart metering systems supporting prepaid functionality 18

Maria Nenova
Sensitivity investigations of second-order bandpass/bandstop filter sections 25

ELECTRICAL ENGINEERING

Sergey E. Ryvkin, Danil A. Drozhzhin
Network voltage distortion by arc furnace and its mitigation 29

Alexander B. Kuvaldin, Maxim A. Fedin, Michail L. Strupinskiy, Nikolay N. Khrenkov
Development and application of induction and resistive electrical heating systems for industrial pipelines 34

PRACTICAL APPLICATIONS

Boris Jovchev, Rositza Mladenova
Visible light as a communication medium – from illumination to data transmission 40