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  1.  96
    Chewing Khat Habit among Students of Dire Dawa University, Ethiopia.Mustefa Jibril - 2021 - Report and Opinion Journal 13 (10):7-11.
    Chewing Khat is one of the leading causes of mental disorders in Ethiopia. An alarming increase in Khat chewing among adults since the early 1990s was reported. Studies have shown that starting chewing Khat early in life is associated with an increased risk of adverse health effects. The objective of the study: This study was conducted to measure the increase in Khat chewing among students at Dire Dawa University students in Dire Dawa City, identify the natural causes of the problem, (...)
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  2. Design and Kinematics Analysis of Suspension System for ABAY Vehicle.Mustefa Jibril - 2021 - Report and Opinion Journal 13 (10):12-24.
    The main objective of the suspension of a vehicle is to maximize the contact between the vehicle tires and the road surface, provide steering stability and provide safe vehicle control in all conditions, evenly support the weight of the vehicle, transfer the loads to springs, and guaranteeing the comfort of the driver by absorbing and dampening shock. This paper discusses the kinematic design of a double a-arm Suspension system for ABAY Vehicle. The hardpoint's location can be determined using this procedure (...)
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  3.  41
    The Comparison of Developing Self Esteem Among Dire Dawa University Male Technology Students.Mustefa Jibril - 2021 - Report and Opinion Journal 13 (10):25-28.
    This study aimed to compare the levels of self-esteem among Dire Dawa University Male Technology students for the program of computer science (CS), Information Technology (IT), Computer Engineering (CE). Subjects for this study were randomly selected. 90 students (30 in Computer Science, 30 in Information Technology, and a 30-in Computer Engineering) were selected as the subjects for this study. The self-esteem of the assessment, so that the student has been Prepared by Rekha Agnihotri self-confidence Inventory (ASCI). For the comparison between (...)
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  4.  94
    A Study of Emotional Intelligence of Electrical Engineering students in Dire Dawa University Ethiopia.Mustefa Jibril - 2021 - Report and Opinion Journal 13 (7):5-7.
    The present study was carried out to study the emotional intelligence of Electrical Engineering students in Dire Dawa University Ethiopia. The sample for the study was 90 (30 Industrial control engineering streams, 30 Power system engineering streams, and 30 Communication engineering streams) randomly selected from Dire Dawa university, school of electrical and computer engineering. A sample scale was employed for the data collection and a t-test was employed for the analysis of data. The outcome of the study shows that Industrial (...)
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  5.  94
    Performance Investigation of AC Servomotor Position Control using Fuzzy Logic and Observer Based Controllers.Mustefa Jibril, Mesay Tadesse & Elias Alemayehu - 2021 - Report and Opinion Journal 13 (1):1-5.
    An AC servomotor which is mostly a two-phase induction motor with two stator field coils placed 90 electrical degrees apart used for controlling position, speed and acceleration in manufacturing industries. In this paper, a two-phase induction motor has been designed with a fuzzy logic and observer based controllers to improve the performance of the system. Comparison of the AC servomotor with the proposed controllers for tracking a step and a square desired position signal input has been done using Matlab/Simulink toolbox (...)
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  6.  46
    Modeling and Simulation of a Horizontally Moving Suspended Mass Pendulum Base using H infinity Optimal Loop Shaping Controller with First and Second Order Desired Loop Shaping Functions.Mustefa Jibril, Mesay Tadesse & Reta Degefa - 2021 - Report and Opinion Journal 13 (1):16-19.
    In this paper, a horizontally moving suspended mass pendulum base is designed and controlled using robust control theory. H  optimal loop shaping with first and second order desired loop shaping function controllers are used to improve the performance of the system using Matlab/Simulink Toolbox. Comparison of the H  optimal loop shaping with first and second order desired loop shaping function controllers for the proposed system have been done to track the desired angular position of the pendulum using step (...)
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