VOLUME 9/2024 ISSUE 2

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Journal of Engineering Sciences and Innovation (JESI) is indexed in the following databases for academic journals:

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Cover: Mihai GĂZDARU

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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
Honorary President of Technical Sciences Academy of Romania
Managing editor: Dan BOGDAN
AGIR Publishing House

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– covers all disciplines of engineering sciences;
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Copyright. Journal of Engineering Sciences and Innovation (JESI) has the copyright for all the published papers; it is a Gold Open Access Journal.
The readers are free to download, copy and distribute the paper content, even commercially, as long as they credit you for the original creation and cited the paper author(s).

Journals fusion. Starting January 01, 2022 the journals mentioned below fuse with JESI and terminate their activity. The issues specific to each journal will be included in the appropriate section of the JESI:

‒ the journal Termotehnica / Thermal Engineering / Thermotehnique, will be included in section Thermal Science and Engineering;

‒ the Romanian Journal of Mechanics will be included in the section Mechanical Engineering;

‒ the Journal Telecommunications will be included in the section Electrical and Electronics Engineering, Computer Sciences and Engineering (starting with nr. 3/2022 of JESI journal).

A. Mechanical Engineering
Mircea Radeș

Using principal response analysis in rotordynamics

105

Ioan Doroftei, Ovidiu-Vasile Crivoi, Ioan-Alexandru Doroftei
Theoretical aspects of internal-external gear pairs with small difference in number of teeth and their applications to cycloidal gear mechanisms

113

C. Chemical Engineering, Materials Science and Engineering

Petru Moldovan, Mihai Buțu, Mihai Brânzei, Constantin-Domenic Stăncel, Lucian Roșu
Advanced fabrication and characterization of ZrB₂reinforcement AA6063 matrix composites

129

Naomi A. Ogolo, Kingsley Amachree, Mike O. Onyekonwu
Clay stability with nanoparticles in a polar and non-polar liquid

141

D. Environmental Engineering and Energy
Viorel Bădescu
Best operation strategies for piezoelectric vibration energy harvesters.III. Application to controllable inductance and capacitive loads

149