VOLUME 6/2021, ISSUE 2

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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.;
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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

A. Mechanical Engineering
Mircea Rades
Modal analysis of a circular disc using the QLP decomposition of FRF matrices

Tudorache (Nistor) R.I., Samoila C., Ursutiu D.
Determination of fatigue resistance for steels treated in thermal different ways

107

Hesam haji Hosseini Nouri, Mohsen Shahrouzi
Experimental evaluation of compressive strength of steel fiber reinforced soil

121

B. Chemical Engineering, Materials Science and Engineering
Mihai Ovidiu Cojocaru, Mihai Brậnzei, Tudor Coman, Leontin Nicolae Drugặ
Superior recovery of ferrous waste

137

Ioan Ilca, Daniela Miloştean, Ştefan Balazsi
Increasing of rolling mill rolls durability in operation. Part I

147

Diana-Carme Mirilă, Denisa-Ileana Nistor
Oxidative study of Acid Yellow 23 using K10-Montmorillonite chemically modified

159

E. Electrical and Electronics Engineering
Georgeta Alecu, Wilhelm Kappel
Elements of circular economy in the manufacture of NdFeB permanent magnets IN ICPE-CA

157

F. Petroleum and Mining Engineering
Ayham Mhanna, Mohamed Halafawi, Lazăr Avram
Tackling wellbore difficulties for drilling deviated and horizontal wells

189

Victor Arad, Nicolae Iliaş, Susana Arad, Marian Ticu, Liviu Popa, Dorin Dragan
Geotechnical research regarding the use of solid mineral tailings from the mining industry in construction, in the context of circular economy

203

Timur Chis, Renata Rădulescu
The effect of additives on the properties of crude oil