Browsing by Author "Mihret, Abebe"

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    Factors Determining the Internal Audit Effectiveness in Ethiopia in the Case of FDRE Ministries
    (A.A.U., 2020-03) Mihret, Abebe; Alem, Hagos (Phd)
    Internal Audit is the backbone of an organization as an internal control method. Where the effective IAD is, the organization is strong and effective in its activities. Internal audit has an essential role in helping a firm to achieve its objectives. The budgetary public sector entities are liable for the appropriate utilization of public resources. Despite the fact is the internal audit system implemented in FDRE ministers in Ethiopia since 1942; the attention given to its effectiveness is too low. Thus, the main purpose of this study is to identify the determinants of internal audit effectiveness in FDRE ministers in Ethiopia.. The study used explanatory research design and mixed research method. The research conducted on all (19) Executive organs. The quantitative method administered through adapted and constructed in 5-point Likert scale questionnaires and distributed to all FDRE excutive organ’s Internal Auditors. From the responses 77 efficient questionnaires, response taken and analyzed using state statistical software. The results of the analysis showed that the management Support and quality of audit work have statistically significant and positive relation with EIA; the organizational independence of internal auditors has statistically not significant and positive relation with EIA.
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    Foundation Assessment: a Case in Megech Dam Project, North-Western Ethiopia
    (Addis Ababa University, 2020-06-06) Mihret, Abebe; Kumar, Tarun (PhD)
    Dams are civil engineering structures built to impound large volume of water for different purpose and are built in different sizes, shapes and types. Geotechnical and Engineering geological assessments play a great role in deciding size, shape, type, location and ensure safe performance of dams. The present study was carried out at Megech dam project which is an earth –rock fill embankment type dam with central clay core and is 76m high from the river bed. The study area is located in Amhara National Regional State, in Northwestern Ethiopia about 740 km from Addis Ababa. The main objective of the present study was to carry out geotechnical and engineering geological investigations to address Rock mass quality, permeability and deformability of the rock mass in the dam foundation. Besides, bearing capacity and settlement potential of piles under the intake and conduit outlet works of the dam foundation was also assessed. In addition, effect of groundwater chemistry on submerged piles was also studied. For the present study systematic investigation was made to address the geological and geotechnical conditions prevailed in the dam foundation. Primary and secondary data was utilized to know the rock mass properties and to classify the rock mass through rock mass rating system. Further, the strength and deformability characteristics of the rock mass were estimated through empirical relations using rock mass rating system (RMR). Rock mass classification, deformability and strength results of the rock mass at dam foundation suggests low quality rock mass on left abutment as compared to the right abutment. In addition permeability of rock mass in dam foundation was assessed based on lugeon test results which indicated necessity of (improvement) grouting in the dam foundation with extensive grouting in the left abutment. The bearing capacity and settlement assessment for piles under conduit and intake structure suggests relatively high allowable bearing capacity for the right abutment as compared to the left abutment. Further, the study also suggests that the piles submerged in water under the intake and conduit outlet works will safely serve their design period without any deterioration resulted from the ground water aggressiveness.