issue 9-10

20190910-full
Issue 9-10, 2019

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 54. No 9-10/2019
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20190910-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE

Aydan Haka
Software tool for comparing LTE traffic prioritisation algorithms 146

ELECTRICAL ...  read more

20190910-01
Software tool for comparing LTE traffic prioritisation algorithms
Aydan Haka

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The anticipated expansion of LTE subscriptions worldwide, affect the need to improve QoS. This can be done by extending and improving the existing network architecture and implementing new algorithms for traffic prioritisation. ...  read more

20190910-02
Overall robust optimization approach for electron beam induced grafting process
Lilyana Koleva, Elena Koleva, Monica R. Nemtanu, Mirela Braşoveanu

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The article presents a review of how to pick or design the correct most cost-effective BLDC (Brushless Direct Current) motor controller to fit the needs of the project. After a brief overview of the history and presenting ...  read more

20190910-03
DC-DC converter for interfacing PV panel to micro-inverter
Zahari Zarkov

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Photovoltaic (PV) energy has become competitive in power generation as an alternative to fossil fuels over the past decades. The installation of solar energy systems is expected to increase rapidly with the further development ...  read more

20190910-04
Review for choosing the correct BLDC controller
Vasil Vasilev, Emil Vladkov

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The article presents a review of how to pick or design the correct most cost-effective BLDC (Brushless Direct Current) motor controller to fit the needs of the project. After a brief overview of the history and presenting ...  read more

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
Simulation study and analysis in transmitting RZ and NRZ coded signals into 10 Gbps optical line with optical amplifying sections 9

ELECTRONICS

Kiril Ivanov
Plasma sterilization – special features and new approaches in medical applications 15

INNOVATIVE TECHNOLOGIES

Elena Shoikova, Anatoly Peshev


 ...  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 – EBT 2018, Varna, BULGARIA
Preface by Corr. Member of BAS, Prof. DSc. G. Mladenov, Assoc. Prof. Elena Koleva, Bulgaria 229

ELECTRON BEAM AND LASER TECHNOLOGIES

Colin Ribton, Arben Ferhati, Nick Longfield, Phil Juffs
Production weld quality assurance through monitoring of beam characteristics 231

Peter J. Oving
Development of a miniature 3 axis magnetic field sensor to predict the magnetic stray field influence on electron beams 236

Tim Mitchell, Chris Allen, Andrew Norman
Comparison of electron beam and laser welding for safety critical space applications 241

Prakash Kattire, Valmik Bhawar, Sandeep Thakare, Rajkumar Singh


 ...  read more

20180910-01
Production weld quality assurance through monitoring of beam characteristics
Colin Ribton, Arben Ferhati, Nick Longfield, Phil Juffs

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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 ...  read more

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

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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, ...  read more

20180910-03
Comparison of electron beam and laser welding for safety critical space applications
Tim Mitchell, Chris Allen, Andrew Norman

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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 ...  read more