VOLUME 6/2021, ISSUE 3

This work is licensed under a Creative Commons Attribution 4.0 International License. Journal of Engineering Sciences and Innovation (JESI) is indexed in the following databases for academic journals: – Directory of Open Access Journals (DOAJ); – EBSCO, Publishing Inc.; – Open Academic Journal Index (OAJI); – Index Copernicus; – Google Scholar.

Editor-in-chief: Valeriu V. JINESCU  University Politehnica of Bucharest Co-editor: Florin Teodor TANASESCU University Politehnica of Bucharest Honorary editor: Mihai MIHAITA President of Technical Sciences Academy of Romania Managing editor: Dan BOGDAN AGIR Publishing House Quarterly multidisciplinary scientific journal:: – covers all disciplines of engineering sciences; – free of charge. No processing and submission charges; – open access; – hard copy version, ISSN 2601 -6699; – on-line version, ISSN-L2537 – 320X; – high visibility, anyone can read and/or download a paper; – jesi@astr.ro

CONTENTS

 A. Mechanical Engineering 

Costică Atanasiu, Ștefan Sorohan 

Stress concentration in the components of a drive coupling

 223 

Daniel Mărguță, Eugen Herghelegiu, Cătălin Tâmpu, Simona-Nicoleta Mazurchevici, Dumitru Nedelcu 

Technological parameters influence on biodegradable injected polymers during water jet cutting

235 

George Ghiocel Ojoc, Cornel Băbuț, Nicolae Ungureanu, Lorena Deleanu 

FEM analysis of Storz coupling

249 

C. Chemical Engineering, Materials Science and Engineering 

Grigore Bozga, Gheorghe Ivănuș, Ionuț Banu 

An analysis of dimethyl ether synthesis from syngas

259 

Cosmin Jinescu 

Technological design elements for pulsed extraction columns with sieve trays

271 

Claudia Samarineanu, Dumitra Lucan, Gabriela Tudorache 

The PbO concentration influence on oxides films developed on Incoloy 800 in CANDU secondary circuit conditions

281 

Ion Bibicu 

Mössbauer studies on steel samples

289 

Diana Paleu, Ileana-Denisa Nistor 

Aspects regarding the preparation methods of anionic clays

307 

E. Civil Engineering and Transport Engineering 

Dan Stematiu, Radu Drobot 

A procedure for rating the dam safety improvement works

323 

G. Petroleum and Mining Engineering 

Tudor Adrian Ionuț, Ripeanu Razvan George 

BEM simulation on the influence of dispersion currents on buried pipes

335 

H. Inter – and Transdisciplinarity in Science and Technology 

Valeriu V. Jinescu 

The limitations of energy accessibility, the irreversibility and two transdisciplinary principles

349 

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