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Now showing items 1612-1631 of 2464

Observer based Speed Control of PMSM using TMS320F2812 DSP

Abdie, Hamdihun (Addis Ababa University, 2012-10)

Problems due to mechanical position sensor of Permanent Magnet Synchronous Motor during speed control are alleviated by an observer for estimating instantaneous speed and position of the rotor. This needs a high performance ...
Occupational Safety and Health Management System Development for Construction Industry (Case of Construction Companies in Addis Ababa)

Assegid, Gebremariam (Addis Ababa University, 2018-10)

In the 21st century, promoting safety and health in workplaces is one of the major aspects of human being receiving a considerable attention of researchers, scholars, government and NGOs, and organizations. Accidents in ...
Offline Candidate Hand Gesture Selection and Trajectory Determination for Continuous Ethiopian Sign Language

Tsegay, Abadi (Addis Ababa University, 2011-10)

There is a clear communication gap between the deaf and hearing community. To bridge this gap, one possible solution is to teach the hearing community to use sign languages. However, a better solution is to develop a ...
Online Simulation of Silicon-Germanium Heterojunction Bipolar Transitor Using Nanohub Simulator

Tesfaye, Damot (Addis Ababa University, 2008-02)
Operation Modeling for Tendaho Reservoir Using HEC-Ressim

Asrat, Biruk (Addis Ababa University, 2010-12)

In this study it has been intended to develop operation modeling for Tendaho reservoir using HEC-ResSim software. The input data considered for the model are daily inflow, monthly irrigation and environmental diversion ...
Optimal Controller Design for Wind Turbine System Using Dynamic Programming

Abibual, Abate (Addis Ababa University, 2019-10)

Now a days, many researchers are focusing on renewable energy sources due to the fact that the cost of fuel is growing up in day to day activity and to decrease or limit environmental effects.Wind energy is one of the ...
Optimal Controller for Steam Boiler Drum Water Level Control Using Neural Network Estimator and LQR

Asmamaw, Amesha (Addis Ababa University, 2018-10)

The water level of boiler drum is one of the crucial control parameters for any process industries, which reflects the control of mainly boiler load and feed water indirectly. The increasing demand for rapid changes in ...
Optimal Design and Scheduling of Irrigation Pumps by Using General Algebraic Modelling Systems (Gams) A Case Study of Fentale-Qawa Pump Station

Etana, Girma (Addis Ababa University, 2015-03)

Traditionally, design engineers tend to be conservative in calculating pump station decision variables by focusing on peak demands that occur about1% of the time. On the other hand, optimal design and operation of pumping ...
Optimal Design for Prestressed Concrete Box Girder Brigde

HaileMichael, Samuel (Addis Ababa University, 2002-06)

This thesis concerned with optimization of simply supported prestresed concrete box girder bridge. Usually, the design of prestressed concrete bridges is done based on codes on prestressed concrete bridges. The code ...
Optimal Design of Low Pass Finite Impulse Response Filter Using Hybrid Population Based Algorithm

Damte, Tsehaye (Addis Ababa University, 2014-03)

This research presents an optimal design of linear phase digital low pass finite impulse response (FIR) filter using hybrid population based algorithm (the hybrid of genetic algorithm and particle swarm optimization). The ...
Optimal Location and Sizing of Distributed Generation The Case Study of Adama Distribution System

Kedir, Adnan (Addis Ababa University, 2015-03)

Integrating distributed generation (DG) to an existing distribution system delivers various profits for both utility and end users. Distributed generation provides a means to beat incremental increase in energy demand, to ...
Optimal Multi-Objective Capacity Enhancement and Energy Efficient HetNet Planning and Deployment Approach: The Case of Addis Ababa, Ethiopia

Habtamu, Abayneh (Addis Ababa University, 2019-12)

Following growth in infrastructure, number of subscribers and availability of smart devices and applications, the aggregate cellular data traffic in Addis Ababa city’s cellular network is increasing exponentially. Moreover, ...
Optimal placement of Controllers for the Adoption of Software Deﬁned Networking: In the case of ethiotelecom

Zemene, Markos (AAU, 2018-11-14)

The tremendous increase of data trafﬁc has been a key reason for the upgrading of traditional networks. One of the new models that has been developed for redesigning and managing communication networks is software-deﬁned ...
Optimal Power Generation Expansion Planning for Ethiopian Electric Power System

Teshager, Girmaw (Addis Ababa University, 2011-07)

This thesis presents an optimal power generation expansion planning model that considers the growth of fuel prices and its fluctuation, power risks, benefits of carbon-trading in generation expansion decision. The developed ...
Optimal Removal of Methylene Blue in Aqueous Solution Using Selected Rice Husk Activated Carbon from Pore Development Agent.

Alemie, Desalgne (Addis Ababa University, 2019-11)

In this study, the possible utilization of rice husk activated carbon as an adsorbent for the optimum removal of methylene blue dye from aqueous solutions has been investigated. Selective criterions for rice husk activated ...
Optimal Sizing of Grid-PV Hybrid System for ethio telecom Access Layer Devices and Its Economic Feasibility

Rihana, Mohammed (Addis Ababa University, 2017-06)

In Ethiopia, conventional grid power is primary source for base stations with backup from diesel generator and/or battery. Unstable diesel price; huge expenses of fuel and its transportation; and high carbon emissions ...
Optimal Traffic Signal Timing Allocation for Urban Congested Roundabouts Case Study at Gerji Emperial, Bole Mikael and Saris Abo Roundabouts

Tesfamariam, Eyob (Addis Ababa University, 2017-07)

Traffic congestion is a critical problem in Addis Ababa Ethiopia due to the fast growing economy, car ownership and population in the country. The road improvement practices also contribute to the reduction in roadway ...
Optimal Wireless Sensor Networks Deployment in 3-Dimensional Terrains using Hybrid Population Based Algorithm

Enyew, Yiwab (Addis Ababa University, 2014-02)

Wireless sensor networks (WSNs) are composed of cooperating sensor nodes that can perceive the environment to monitor physical phenomena and events of interest. Sensor deployment is a fundamental issue in a WSNs to ...
Optimazation and Characterization of Extract Essential Oil from Zingiber Officinale and Evaluate Antimicrobial Effect

chewaka, Fire (Addis Ababa University, 2016-11)

The demand projection in Ethiopia divulges that the domestic demands for essential oils are substantially increasing with time. This increasing demand of essential oil, such as ginger oil has opened up wide opportunities ...
Optimisation of Internal Shape of Disc Brake to Increase Ventilation

Abrham, Tibeb (Addis Ababa University, 2017-02)

Brake system has always been one of the most critical active safety systems. Brake cooling is further an important aspect to consider for brake disc durability and performance. In railway transport, braking the train ...

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