issue 9-10

20170910-full
Issue 9-10, 2017

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 52. No 9-10/2017
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20170910-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE

Zdravka Tchobanova
Cooperative spectrum sensing – overview 1

Stanimir Sadinov
 ...  read more

20180910-full
Issue 9-10, 2018

ELECTROTECHNICA & ELECTRONICA E+E

Thirteenth International Conference on Electron Beam Technologies – EBT 2018, 18-22 June, Varna, Bulgaria

Vol. 53. No 9-10/2018
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20180910-full

C O N T E N T S

Special issue: Scientific papers from 13-th International Conference on Electron Beam Technologies ...  read more

20180910-01
Production weld quality assurance through monitoring of beam characteristics

This paper describes the development of a quality assurance tool for production electron beam welding. The BeamAssure probe system has been installed on a number of production and development electron beam machines. The hardware and ...  read more

20180910-02
Development of a miniature 3 axis magnetic field sensor to predict the magnetic stray field influence on electron beams

The desired form of electron beams is generally obtained by the use of magnetic fields in coils by focalisation, deflection, and other. The beam form is also influenced, due to incomplete shielding, by the magnetic environment, which ...  read more

20180910-03
Comparison of electron beam and laser welding for safety critical space applications

Recent work completed for ESA and Ariane Group performed a comprehensive comparative assessment of laser and electron beam processes, targeting stainless steel flow control valve materials and typical penetrations to determine if any ...  read more

20180910-04
Experimental characterization of laser cladding of Stellite 21 on H13 tool steel

The repair of dies and molds by using additive manufacturing techniques such as laser cladding (LC) is an important and emerging trend in tooling industry today. LC provides an alternative to the traditional deposition techniques. In ...  read more

20180910-05
Model-based approach for the shape estimation of electron beam welding joints

This article discusses a modeling approach for the obtained by electron beam welding molten pool shapes, which is based on experimental data, type mathematical function and regression analysis. The process of electron beam multi-pool ...  read more

20180910-06
Construction of a preliminary file backup system for surface analysis data using secret sharing technique

We have established a preliminary file backup system to study the outline of secret sharing technology and test operations. Secret sharing scheme is a key management scheme or key establishment scheme invented separately in 1979 by ...  read more

20180910-07
Model-driven development of event management system

Electron Beam Technologies Conference is an international conference, which originated in 1985. The challenge for the management of this event, as well as the numerous such events that are organized every year around the world, is to ...  read more

20180910-08
Analysis of the ergonomic quality of e-learning through statistical methods

A key factor in e-learning in the future will be a quality orientation that firstly places learners or users of education services. They have to take the lead in terms of quality concepts of e-learning, since their professional competence ...  read more