VOLUME 4/2019,ISSUE 2

This work is licensed under a Creative Commons Attribution 4.0 International License. The Journal is included in the international database: DOAJ (Directory of Open Access Journals)

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 RomaniaManaging editor: Ioan Ganea AGIR Publishing House Journal of Engineering Sciences and Innovation is a quarterly multidisciplinary scientific journal, print and electronic: – 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

Mircea Radeş
Modal analysis of a simple cyclic system

http://doi.org/10.56958/jesi.2019.4.2.115

115

Constantinescu Dan Mihai, Apostol Dragoş Alexandru
Onset of densification and energy absorption efficiency of polyurethane foams
http://doi.org/10.56958/jesi.2019.4.2.131

131

Bostan Viorel, Guțu Marin, Rabei Ion
Numerical simulation of transient aerodynamic processes in the vertical axis wind turbine rotor
http://doi.org/10.56958/jesi.2019.4.2.145

145

Ligia Munteanu, Veturia Chiroiu, Ciprian Dragne, Cristian Rugină, Polidor Bratu
On the sonification technique
http://doi.org/10.56958/jesi.2019.4.2.155

155

B. Chemical Engineering, Materials Science and Engineering

Gyorgy Thalmaier, Silvia Şuta, Niculina Sechel, Ioan Vida – Simiti
Study and research on obtaining porous materials type Al3Ti by sintering reactive
http://doi.org/10.56958/jesi.2019.4.2.169

169

C. Enviromental Engineering and Energy

Bostan Ion, Bostan Viorel, Dulgheru Valeriu, Sobor Ion
Integrated irrigation system with photovoltaic panels and wind turbine
http://doi.org/10.56958/jesi.2019.4.2.175

175

D. Civil Engineering

N. Sirbu
A new approach in evaluation of a spillway capacity preserving the safety requirements
http://doi.org/10.56958/jesi.2019.4.2.185

185

E. Petroleum and Mining Engineering

Carsten Drebenstedt
Responsible mining approach for sustainable development – research concept and solutions
http://doi.org/10.56958/jesi.2019.4.2.197

197

AGIR Publishing House