Volume 50, Issue 11-12, 2015

Issue 11-12, 2015


Vol. 50. No 11-12/2015
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA




Georgi M. Mladenov
 ...  read more

Study of power fluctuations and their compensation in a hybrid system with renewable energy sources

This paper deals with the combined influence of photovoltaic and different wind energy potentials and respectively the produced energy on the operation of an autonomous hybrid system. The studied system comprises a PV generator, a wind ...  read more

Analysis of the torque ripple of permanent magnet synchronous motors with inset and embedded magnets

This paper analyzes with magnetic field distribution and torque ripple of Permanent Magnet Synchronous Motors (PMSM) with inset and embedded magnets. An analytical model of the motor has been developed. The model uses iterative procedure ...  read more

Single server queueing model with state dependent arrival and departure rates

In this article, a single server delay system with a state dependent arrival and departure processes is investigated. The generalized arrival and service flow with nonlinear state dependence intensities is used. The idea is based on ...  read more

Globalization and digital privacy

Contemporary Information Society proposes variety of opportunities for communication between users (social networks & social media), different activities and services (cloud computing and mobile cloud computing), sharing information ...  read more

Transcranial direct current stimulation: complex protocol and device for neurophysiological investigations

Transcranial direct current stimulation (tDCS) is an emerging technique for noninvasive brain stimulation, which induces plasticity in the brain via application of relatively weak currents through the scalp in humans. In the last years, ...  read more

Computer modeling, simulation and model parameter extraction of submicron integrated circuits using SPICE

With the fast development of submicron technologies, the need of accurate modeling, simulation and parameter extraction of RF microelectronic devices increases. The accuracy of the developed models and parameter extraction approaches ...  read more

Comparison between circuits for charging and voltage balancing over series connected elements for energy storage

In the following article two circuits for simultaneously charging and voltage balancing are studied and compared. Simulation and experimental studies have been made. They show the changes, which occur during the operating mode of the ...  read more

Nanotechnology – the moving force of nowadays electronics, information technologies and telecommunications

Modern electronics devices and systems, computers and telecommunications are developing due to the achievements in nanotechnologies – a new scientific and applied field that uses the application of methods and techniques that provide ...  read more