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239The Prevalence of Addiction Among Students in Dire Dawa University EthiopiaNew York Science Journal 14 (11): 16-20. 2021.This study was carried out to determine the prevalence of, and reasons for the various forms of addictive use among the students of the University of Dire Dawa. The research system is used, cross-sectional, questionnairequestion. This study has been carried out, including the first-and second-year students at the University of Dire Dawa. The study included 164 students who have completed a structured questionnaire. The Data was analyzed on SPSS version 16. The prevalence of addictive use was 20.…Read more
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154The Comparison of Developing Self Esteem Among Dire Dawa University Male Technology StudentsReport and Opinion Journal 13 (10): 25-28. 2021.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-conf…Read more
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460Government School Principals Leadership Style and Its Effect on Academic Achievement in EthiopiaNew York Science Journal 14 (11): 10-15. 2021.This research was conducted at 15 government schools in Addis Ababa. The objectives of this research are to identify principal style and its effect on academic achievement. The “Leader Behavior Description Questionnaire” (LBDQ) formed by Halpin (1966) was used. Meanwhile Academic achievement was measured using the “School Certificate Examination Results from 2017-2020. A total of 191 teachers and 15 principals from government school in Addis Ababa were randomly chosen. Pearson correlation was us…Read more
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188Evaluation of Department Head Person Based on Gender, Gender Role Orientation, and Attachment of Labels in Dire Dawa UniversityNew York Science Journal 14 (11): 6-9. 2021.The study, designed to find out the gender outcome, gender roles, and labeling of labels in the department's head examination, was conducted using 194 study participants recruited from lecturers at Dire Dawa University in Ethiopia 116 women and 78 were males aged 29.23. The following five labels are used: Department head in general, efficient male Department head, efficient female Department head, inefficient male Department head, and inefficient female Department head) were responded to by the …Read more
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108The Attitude Towards using Slide Projectors Among Dire Dawa University Lecturers in EthiopiaResearcher Journal 13 (10): 28-33. 2021.The present study was conducted to compare the attitude of Dire Dawa University Lecturers Attitude Towards using Slide Projectors. The sample for the proposed study consisted of 120 lecturers (social science: Male=30, Female=30)(Natural science: Male=30, Female=30). A random sampling strategy was followed to draw the sample for the study. The data were subjected to various statistical treatments. The results reveal the male dire Dawa University and Natural science lecturers have a favorable atti…Read more
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2296Design and Kinematics Analysis of Suspension System for ABAY VehicleReport and Opinion Journal 13 (10): 12-24. 2021.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 t…Read more
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156Ethiopian Higher Education Students Attitude Towards Physical EducationResearcher Journal 13 (10): 23-27. 2021.The purpose of the existing examination has changed to gain access to the "Ethiopian Higher Education Students' Status of Physical Education". The current study was conducted on 800 students (500 males and 300 females) between the ages of 20 and 26 years. The subjects were Ethiopian Higher Education Students, Addis Ababa, and Dire Dawa. Topics were Ethiopian Higher Education Students, Addis Ababa, and Dire Dawa. The responses collected from the given studies were converted into raw data with the…Read more
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232Chewing Khat Habit among Students of Dire Dawa University, EthiopiaReport and Opinion Journal 13 (10): 7-11. 2021.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, and demonst…Read more
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1011Design and evaluation of solar parabolic trough collector system integrated with conventional oil boilerARCHIVES OF ELECTRICAL ENGINEERING 70 (3): 657-673. 2021.In this paper an attempt has been made towards the design and evaluation of a solar parabolic trough collector (PTC) system integrated with a conventional oil boiler (COB) to increase the energy utilization effectiveness and reduce the environmental emission of the existing conventional oil boiler in the Kombolcha textile factory, in Ethiopia. The factory uses 8500 ton/annum of heavy fuel oil to generate 26 ton/hour of pressurized hot water at 140C temperature which causes an increase in greenho…Read more
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166New Tuning Approach of Fuzzy Logic System Using Proportional Integral Observer for Tracking a Nonlinear SystemScienceOpen 7 (3): 1-13. 2021.Proportional integral observer (PIO) for tracking a nonlinear method has a lower sentiency to cipher the state and output variables. So a more nonlinear controller has to be else to control to activity. In this paper, a fuzzy logic (FLC) controller has been added to the PIO to meliorate the calculation transmute. A fuzzy proportional integral observer (FPIO) for following a nonlinear system has been premeditated to decimate the susceptibleness to cipher the tell and turnout variables with the ex…Read more
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287Mechanical Ventilator Design for COVID-19 Patient with Resistive Belt SensorScienceOpen 7 (3): 1-9. 2021.A ventilator is a device that provides cool air by moving the air in or out of the lungs, inhaling a patient who is not fit to smell, or breathing properly. In this paper, a resistive chest belt sensorbased mechanical ventilator is designed to provide the COVID-19 patient with the volume of air you need to deliver with the expansion of the patient's chest in need of more air. The resistive band sensor senses the expansion of the patient's chest and controls the solenoid valve attached to the oxy…Read more
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199Integrated Design of Adaptive & Fuzzy Logic Control for Trajectory Tracking of 2 DOF QuadrotorScienceOpen 7 (3): 1-16. 2021.Accurate and precise trajectory tracking is crucial for a quadrotor to operate in disturbed environments. This paper presents a novel tracking hybrid controller for a quadrotor UAV that combines the Adaptive and Fuzzy logic controller. The Adaptive fuzzy controller is implemented to govern the behavior of two degrees of freedom quadrotor UAV. The proposed controller allows controlling the movement of UAVs to track a given trajectory in a 2D vertical plane. The Fuzzy Logic system provides an auto…Read more
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308The Attitude of Students Concerning Gender and Rural‐Urban Dichotomy in Dire Dawa UniversityACE International Journal of Social Sciences 1 (3): 28-34. 2021.The current study was conducted to assess the attitude of higher education students. The current study sample consists of 600 students selected from the Dire Dawa University. The Student Attitude Inventory (SAI) was developed using 6 subsidies given to sample subjects for data collection purposes. The researcher used the most widely accepted and widely used mathematical methods to analyze and interpret data including mean, SD and t‐test. The results showed that male students had a better and mor…Read more
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174The Evaluation Between Importance of Educational Needs and Satisfaction about it as Perceived by Engineering Students at Dire Dawa University EthiopiaACE International Journal of Social Sciences 1 (2): 19-24. 2021.This study aimed to examine the perception of Engineering students about importance of educational needs and satisfaction about it. A descriptive correlational design was used for this study. The present study was conducted at engineering faculties in Dire Dawa University. The present study included a total coverage sample includes all four academic years engineering students during academic year (2021). Total number of students was (n = 727). The study tool consisted of Engineering Education Sa…Read more
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238A Study of Emotional Intelligence of Electrical Engineering students in Dire Dawa University EthiopiaReport and Opinion Journal 13 (7): 5-7. 2021.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 outcom…Read more
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228The Attitude of Students Towards Learning English Language at Secondary Schools in Dire Dawa EthiopiaAcademia Arena Journal 13 (7): 61-64. 2021.This paper reflects the students' attitude toward learning English in secondary schools. The current study was conducted following 57 students at Dire Dawa secondary Schools. The findings suggest that students were generally uncomfortable with the language and subject areas offered in secondary school and agreed that learning English is important for them. Respondents to the current study, who had recently received their primary education, reported that the secondary school syllabus helped them …Read more
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175The Impact of adjustment on Academic achievement among University Students in Dire Dawa EthiopiaNew York Science Journal 14 (7): 17-20. 2021.In the present study an attempt is made to assess the comparison of adjustment and academic achievement among students in Dire Dawa university, Ethiopia. A total of 100 students studying in Dire Dawa university were randomly selected. They were administered in Students Adjustment Inventory (SAI) which measured adjustment of an individual in 4 areas (Campus Life, health, time management and social life). Academic achievement scores were collected from the respective university. One-way ANOVA was …Read more
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779Evaluation on Study Skills and Academic Stress on University Engineering Student’s Academic AchievementACE Journal of Humanities, Social Sciences and Education 1 (2): 18-23. 2021.This study aimed to examine the influence it is to study skills and academic‐related stress in the academic performance of the students of the university. A descriptive research project was used. The study was carried out among students of engineering at the University of Dire Dawa. The study involved 400 students of the engineering bachelor's degrees, one hundred and from the second to the 5th year which has been evaluated for the academic stress and to study skills. A random sample is used to …Read more
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264Evaluation on Success of Graduating with Distinction in Higher Education using Fuzzy DEMATEL MethodACE International Journal of Social Sciences 1 (1): 1-5. 2021.The aim of this study is the evaluation of the Success of Graduating with Distinction in Higher Education (SGDHE) using the fuzzy DEMATEL method. The observation has been done using cause and effect criteria. The 11 cause and 14 effect clusters have been used in this study. The study result of this work shows that all the effects are connected to the given causes and a cause‐effect graph has been generated for each connection. This proposed approach is demonstrated with the empirical case of Dir…Read more
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152Comparison of Neural Network NARMA-L2 Model Reference and Predictive Controllers for Electromagnetic Space Vehicle Suspension SystemJournal of Engineering and Applied Sciences 16 (10): 313-317. 2021.Electromagnetic Suspension System (EMS) is mostly used in the field of high-speed vehicle. In this study, a space exploring vehicle quarter electromagnetic suspension system is modelled, designed and simulated using Neural network-based control problem. NARMA-L2, Model reference and predictive controllers are designed to improve the body travel of the vehicle using bump road profile. Comparison between the proposed controllers is done and a promising simulation result have been analyzed.
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328Temperature Control of a Steam Condenser using NARMA-L2 ControllerJournal of Engineering and Applied Sciences 16 (10): 318-323. 2021.This study investigates the outlet temperature control for the design of steam condenser. The comparison has been made for a step drop in the steam condenser temperature set point using MATLAB/ Simulink environment for the steam condenser with NARMA-L2 using Levenberg-Marquardt algorithm and NARMA-L2 using resilient backpropagation algorithm controllers. The steam condenser with NARMA-L2 using Levenberg-Marquardt algorithm controller presented excellent and superior dynamic performance in respon…Read more
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314Inverted Pendulum Control using NARMA-l2 with Resilient Backpropagation and Levenberg Marquardt Backpropagation Training AlgorithmJournal of Engineering and Applied Sciences 16 (10): 324-330. 2021.In this study, the performance of inverted pendulum has been Investigated using neural network control theory. The proposed controllers used in this study are NARMA-L2 with Resilient backpropagation and Levenberg Marquardt backpropagation algorithm controllers. The mathematical model of Inverted Pendulum on a Cart driving mechanism have been done successfully. Comparison of an inverted pendulum with NARMA-L2 with Resilient backpropagation and Levenberg Marquardt backpropagation algorithm control…Read more
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297Position and Speed Control of 2DOF Industrial Robotic Arm using Robust ControllersJournal of Engineering and Applied Sciences 15 (24): 3765-3769. 2020.In this study, a 2 DOF industrial robotic arm is designed and simulated for elbow and wrist angle and velocity performance improvement using robust control method. Mixed H2/H infinity synthesis with regional pole placement and H2 optimal controllers are used to improve the system output. The open loop response of the robot arm shows that the elbow and wrist angles and velocities need some improvement. Comparison of the proposed controllers for an impulse and step input signals have been done and…Read more
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150Modeling and Performance Analysis of Shell Tube Surface Condenser under Lumped Parameters using Fuzzy Self-tuning PI ControllerInternational Journal of Electronics and Electrical Engineering Systems 3 (4): 1-8. 2020.Shell tube surface condenser (STSC) is a heat exchanger system that exchange a high pressure steam into low pressure water and it is widely used in applications like textile industries and nuclear power plants. The modelling of the system has been established based on lumped parameters. In this paper, a fuzzy expert system is developed in order to improve the performance of the condenser. A pressure feedback system has been developed to analyze the effect of the condenser output temperature, cir…Read more
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100Design and Control of a Vertically Moving Base Inverted Pendulum using PI and PID ControllersNew York Science Journal 13 (11): 6-9. 2020.In this paper, a vertically moving base inverted pendulum control analysis has been done using Matlab/Simulink Toolbox. Because the vertically moving base inverted pendulum system is nonlinear and highly unstable, a feedback control system is used to make the system controlled and stable. A PI and PID controllers are used to improve the stability of the pendulum. Comparison of the vertically moving base inverted pendulum using PI and PID controllers for tracking a desired angular position of the…Read more
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436Design and Control of a Hydraulic Based Tire Changer using H infinity and H2 Optimal Synthesis ControllersBotany Research Journal 13 (3): 14-19. 2020.In this study, the design and control of a hydraulic system based tire changer machine have been analyzed and simulated using MATLAB/Simulink Toolbox successfully. The machine have a displacement input which is a leg pedal displacement in order to push the piston of the pump to fed the motor with a pressured hydraulic fluid to rotate the tire with an angular speed to mount and dismount it. Augmentation based H4 and H2 optimal synthesis controllers have been used to improve the performance of the…Read more
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129Speed Control of Ward Leonard Layout System using H infinity Optimal ControlResearcher Journal 12 (11): 35-39. 2020.In this paper, modelling designing and simulation of a Ward Leonard layout system is done using robust control theory. In order to increase the performance of the Ward Leonard layout system with H optimal control synthesis and H optimal control synthesis via -iteration controllers are used. The open loop response of the Ward Leonard layout system shows that the system needs to be improved. Comparison of the Ward Leonard layout system with H optimal control synthesis and H optimal contro…Read more
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1378Design and Control of a Gantry Crane System with Limited Payload Angle using Robust and State Feedback ControllersJournal of Engineering and Applied Sciences 15 (24): 3770-3777. 2020.In this study, the performance improvement of a payload angle deflection of a gantry crane has been studied and simulated using MATLAB/Simulink toolbox successfully. H2 optimal and observer based controllers has been used to minimize the payload angular deflection by controlling the trolley position. The gantry crane has been compared with the proposed controllers to track the reference trolley position using step and sine wave signals and a promising results have been achieved.
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241Loudspeaker Noise Disturbance Control using Optimal and Robust ControllersJournal of Engineering and Applied Sciences 15 (24): 3778-3782. 2020.Noise reduction is the major issue in the loudspeaker for the application of the musical instruments and related areas. In this study, a noise disturbance control of a loudspeaker with optimal and robust controllers has been done successfully. The noise of the loudspeaker has been analyzed by simply track a reference cone displacement with the actual cone displacement. Static output feedback and H4 optimal loop shaping controllers have been used to compare the actual and reference cone displacem…Read more
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239Performance Investigation of a Permanent Magnet DC Machines using Robust Control TechniqueJournal of Engineering and Applied Sciences 15 (24): 3783-3787. 2020.In this study, the design and performance investigation of the permanent magnet machines have been done to increase the mechanical and electrical outputs improvement of the systems. A Permanent Magnet DC Motor (PMDM) and Generator (PMDG) have been modelled and designed to improve the angular position and generated current respectively. In this research, augmentation based H2 optimal and H4 synthesis controllers have been designed as a controller for the two systems and a comparison between the p…Read more
Mustefa Jibril
Dire Dawa University
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Dire Dawa UniversityLecturer
Areas of Specialization
Other Academic Areas |
Areas of Interest
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