Browsing by Author "Lakew, Alemayehu"

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    The Gravity Filed and Crustal Structure of the Southern end of the Ethiopian Rift System
    (Addis Ababa University, 1993-07) Lakew, Alemayehu; Alemu, Abera (PhD)
    The Bouguer anomaly map of the rift zone south of the southern end of the Main Ethiopian rift between Lat. 4° OO'N .;; 7° OO'N and Long. 36° 00 I E - 39° 45 ' E is presented. The computed Bouguer anomaly map shows a complex pattern of positive and negative Bouguer gravity anomalies. A positive Bouguer gravity anomaly of -165 mGal occurs over the floor of the Abaya-Chamo rift and is flanked by negative anomalies that reside on its shoulders. The anomaly pattern associated with the Chew Bahir rift is completely different from the other regions. The floor has a negative gravity anomaly of magnitude -135 mGal and is flanked by positive gravity anomalies residing on its shoulders. This may be attributed to the swamp and volcano-Iacostrine nature of the rift floor. Further south in Kenya, the Bouguer anomaly map shows that there is a relative increase in magnitude of the regional gravity field with a complex pattern of alternating positive and negative anomalies which are generally oriented a NNW-SSE and E-W direction. Two profiles that run through the major tectonic systems (the Abaya-chamo rift and the Chew Bahir rift) of interest in the area were extracted from the Bouguer anomaly map. 2%-0 gravity models were constructed along these profiles. The results of the model calculations are that: Along Profile AA, the crust beneath the plateaus is 35 to 40 km thick. within the axis of the Abaya-Chamo rift the crust thins to 29 km. Along profile BB, the crust beneath the high lands in the vicinity of the Amaro horst is 35 to 40 km thick. Beneath the rift zone, i.e., the floor of the Chew Bahir rift and the flanking uplifted regions the crust thins to 27 km. The observed crustal thinning beneath_the rift zones along both profiles is thought to be caused by an upward progression of low density mantle material (anomalous mantle) that intrudes itself into the lower crust
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    project contract management practice: the case of heineken breweries share company kilinto phase ii project
    (Addis Ababa University, 2018-06-06) Lakew, Alemayehu; Mohammed, Abdurezak(PhD)
    The purpose of this study is to describe project contract management practice in HBSC Kilinto phase II Project. To address the objectives of this study a descriptive research design was employed as well both quantitative and qualitative approaches were used. Both primary and secondary source of data were employed i.e semi structured-interview and close ended questioner as a primary data and different document analysis were done as a source of secondary data. All employees of HBSC Project team were incorporated in this project work. In which data was gathered by distributing questionnaires to 39 respondents, where 38 were filled in and collected and the remaining 1 is missed, an interview was conducted with the project manager and installation site manager. The data obtained through questionnaire has been analyzed quantitatively using descriptive statistics: frequency and percentage through SPSS version 24 software. Moreover, the data obtained using interviews has been analyzed qualitatively. The project work focused within project contract management practice of HBSC Kilinto II Project by addressing the process namely: contract terms and conditions, contract monitoring, contract documentation and contract controlling and closing. According to the findings of project work, there is standard templates, procedures and policies for the project. On the other side project team lack training in regard to contract management, lack of proper documentation, significant delay, poor implementation of terms and conditions, lack of regular monitoring of contracts and also controlling and closing have been found as the areas that needs improvement. Thus, a recommendation has been made under this study on what actions should be taken in order to improve project contract management practice for current and future projects of Heineken Brewers Share Company.