Issue 5-6, 2017

Issue 5-6, 2017

 

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 52. No 5-6/2017
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20170506-full

C O N T E N T S

ELECTRONICS

Emil Kovatchev, Georgi Mihov
Design and investigations on a high frequency resonant boost converter 1

Vencislav Valchev
Practical approaches for reducing eddy current losses in transformer windings 7

Georgi Panov
Overview of frequency compensations in the CMOS operational amplifiers, Part one – The basics 12

TELECOMMUNICATIONS SCIENCE
Dimitar Atamian, Seferin Mirtchev, Rossitza Goleva
Traffic investigation of priority services in IP networks 18

E-LEARNING
Maria Todorova, Dimitrina. Karamanska, Elena Koleva, Lilyana Koleva
Ergonomic criteria for evaluating the quality of e-learning 24

UP-TO-DATE INFORMATION ON SCIENCE IN BULGARIA
Ministry of Education and Science, Republic of Bulgaria
National strategy for development of scientific research in the republic of Bulgaria 2017 – 2030
(Better science for better Bulgaria) 31

Ministry of Education and Science, Republic of Bulgaria
Bulgaria national roadmap for research infrastructure 2017-2023 37