Browsing by Author "Tesfaye, Solomon"

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    Analysis of Two-Operator Boundary-Domain Integral Equations for Variable-Coefficient Boundary Value Problems in 2D
    (Addis Ababa University, 2020-10-24) Tesfaye, Solomon; Gedif, Tsegaye (PhD); Mikhailov, Sergey E. (Professor)
    In this dissertation, the boundary value problems (BVPs) for the second order elliptic partial differential equation with variable coefficient in two-dimensional bounded domain is considered. Using an appropriate parametrix (Levi function) and applying the two-operator approach (where the one operator approach fails ), the problems are reduced to some systems of boundary-domain integral equations (BDIEs). The two-operator BDIEs in 2D need a special consideration due to their different equivalence properties as compared to higher dimensional case due to the logarithmic term in the parametrix for the associated partial differential equation. Consequently, we need to set conditions on the domain or function spaces to insure the invertibility of the corresponding layer potentials, and hence the unique solvability of BDIEs. Equivalence of the two-operator BDIE systems to the original BVPs, BDIEs solvability, uniqueness/ non uniqueness of the solution, as well as Fredholm property and invertibility of the BDIEs are analysed. Moreover, the two-operator boundary domain integral operators for the Neumann BVP are not invertible, and appropriate finite-dimensional perturbations are constructed leading to invertibility of the perturbed operators.
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    The Effect of Human Resource Development on Organizational Performance: the Case of Ethiopian Electric Utility South Western Region.
    (Addis Ababa University, 2017-05) Tesfaye, Solomon; Gebrehiwot, Firehiwot (Assistant Professor)
    The aims of the study are to examine how HRD/ training, education and development affect performance of the organization and to point out the most significant factors that influence the performance of Ethiopian Electric Utility south western region. The researcher had analyzed HRD/ training and development factor that influence organizational performance which areHRD/training and development need assessment, HRD/training and development design methods, HRD/training and development implementations, and HRD/training and development evaluation. A total of 181 questionnaires were distributed to 181 staffs at Ethiopian Electric Utilitysouth western regional offices by hand and all 181 questionnaires were returned for analysis. The data had been entered by Epi data and analyzed using Statistic Package for Social Sciences (SPSS). Research findings revealed the significant relationship between HRD/ training, education and development variables with organizational performance.Thus the study showed that among all variables, HRD evaluation had a major influence on organizational performance and recommended thatthe organizations should give emphasis to improve its HRD implementation by increasing workers participation in designing training and development implementation programs
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    The Problem of Housing in Hosanna Town: The Case of Addis Ketema Kifle Ketema
    (Addis Ababa University, 2014-06) Tesfaye, Solomon; Woldetsadik, Muluneh (PhD)
    One requirement of housing for human being is to provide shelter in order to provide shelter in order to shield from natural and social phenomena. The problem of housing is a worldwide problem and the problem of housing is more severe in less developing than developed countries. The study is to examine the extent and seriousness of the housing shortage and associated problems. Extensive survey of theoretical and empirical literature was made to support the paper with applicable and worthfull ideas. Primary data were also collected from the study area using both open ended and close ended questionnaires, structured interviews and by referring to documents and reports of the different governmental institutions. Single quantitative techniques are used to analyze the data collected. The study argues that the exacerbation of much of the existing housing problem lies in the failure of policy intervention to facilitate grounds for cooperation between concerned groups. Accordingly, it suggests the need for cooperation and partnership between major interest groups as available tool for future policy capable of taking the housing problem of Hosanna town. The need for future research is also indicated