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
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
