h-index: 7     i10-index: 5

Engineering
Evaluation of Corona Charge Positive and Negative Impulses on Polymeric Surfaces and Simulation of Impact Rate

Ebadollah Amouzad Mahdiraji

Volume 1, Issue 4 , August 2021, , Pages 234-241

https://doi.org/10.48309/EJST.2021.289237.1038

Abstract
  Corona electric discharge phenomenon occurs when the electric field intensity exceeds the corona threshold. In the analysis of this paper, three types of hypotheses of partial charge (electrons, positive ions, negative ions) generated in the air due to corona electrical discharge are considered. The ...  Read More

Evaluation of Corona Charge Positive and Negative Impulses on Polymeric Surfaces and Simulation of Impact Rate


Engineering
Evaluation and Selection of Construction Industry Contractors as an Optimal Model from the Perspective of Health, Safety and Environment

Reza Kolbadinezhad; Ebadollah Amouzad Mahdiraji

Volume 1, Issue 3 , June 2021, , Pages 131-141

https://doi.org/10.48309/EJST.2021.285446.1021

Abstract
  Due to the accelerated trend of transferring most of the activities to contracting companies, the rate of indicators related to occupational accidents has grown alarmingly and has led to the discussion of evaluating and selecting construction contractors in terms of health. Safety and the environment ...  Read More

Evaluation and Selection of Construction Industry Contractors as an Optimal Model from the Perspective of Health, Safety and Environment


Engineering
Effects of Establishing Occupational Health and Safety Management Standards and Environmental Management on Environmental Factors and Employee Satisfaction

Ebadollah Amouzad Mahdiraji; Reza Kolbadinezhad

Volume 1, Issue 3 , June 2021, , Pages 142-149

https://doi.org/10.48309/EJST.2021.285451.1022

Abstract
  This study aimed to investigate the status of the establishment of occupational safety and health management system and environmental management system on environmental factors and employee satisfaction. This paper was a quasi-experimental study of before and after type that was conducted in 2012 in ...  Read More

Effects of Establishing Occupational Health and Safety Management Standards and Environmental Management on Environmental Factors and Employee Satisfaction


Engineering
Inhalation Exposure to Dust Pollution in the Workplace

Reza Kolbadinezhad; Ebadollah Amouzad Mahdiraji

Volume 1, Issue 2 , May 2021, , Pages 72-79

https://doi.org/10.48309/ejst.2021.285211.1018

Abstract
  Exposure to dust in the air is one of the most common environmental hazards in workshops that can have devastating effects on health. In this study, workers' exposure to particles in inhaled air by conventional methods as well as GIS has been investigated. The research was performed cross-sectionally-analytically ...  Read More

Inhalation Exposure to Dust Pollution in the Workplace


Engineering
Adaptive Control of Network Frequency by Doubly-Fed Induction Generators Using a Data-Driven Method

Ebadollah Amouzad Mahdiraji; Mojtaba Sedghi Amiri

Volume 1, Issue 2 , May 2021, , Pages 86-102

https://doi.org/10.48309/ejst.2021.130260

Abstract
  Nowadays, to involve wind turbines in controlling the network frequency, drop and inertia control methods are usually used for variable speed wind turbines. Adjusting the benefits of droop and inertia control loops is very effective on the performance of wind turbines, but due to the variability of wind ...  Read More

Adaptive Control of Network Frequency by Doubly-Fed Induction Generators Using a Data-Driven Method


Engineering
Effects of Fourier Transform and Modal Theory on Cable Fault Location

Mojtaba Sedghi Amiri; Ebadollah Amouzad Mahdiraji

Volume 1, Issue 1 , April 2021, , Pages 11-19

https://doi.org/10.48309/ejst.2021.130258

Abstract
  One of the most commonly used equipment in the power system, which is exposed to various types of faults for various reasons, is high and low voltage pressure cables. Due to the fact that cables, either power or distribution cables are mostly transported from underground, despite their further reliability ...  Read More

Effects of Fourier Transform and Modal Theory on Cable Fault Location


Engineering
Improving the Transient Stability of a Synchronous Generator by Using Braking Resistance to Increase the Critical Clearing Fault Time

Ebadollah Amouzad Mahdiraji

Volume 1, Issue 1 , April 2021, , Pages 37-45

https://doi.org/10.48309/ejst.2021.285385.1019

Abstract
  In general, the stability of the power system can be considered a feature of the system that enables it to remain in equilibrium under normal conditions and regain a different acceptable state if affected by disturbance. Instability in a power system may take many forms, depending on the composition ...  Read More

Improving the Transient Stability of a Synchronous Generator by Using Braking Resistance to Increase the Critical Clearing Fault Time