Browsing by Author "Mohammed, Habtamu"

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    Evaluation of Knowledge Sharing Practice in Commercial Bank of Ethiopia
    (Addis Ababa University, 2011-06) Mohammed, Habtamu; Meshesha, Million(PhD)
    These days the banking sector is operating in a highly dynamic and competitive environment. Thus, with these driving forces banks are starting to understand the relevance and importance of financial knowledge sharing. They are beginning to appreciate knowledge as the most significant and valued assets that lead to organizational excellence for competitive advantage. Therefore, the main aim of this study is to evaluate the practice of knowledge sharing at Commercial Bank of Ethiopia using Nonaka‘s SECI model of knowledge creation and sharing. Nonaka‘s SECI model consists of Socialization, Externalization, Combination and Internalization, which is crucial to assess individual, group and organizational knowledge flow from tacit-to-tacit, tacit-to-explicit, explicit-to-explicit and explicit-totacit, respectively. To this end, the necessary data is collected using questionnaire from Commercial Bank of Ethiopia southern Addis Ababa district and the departments of Human Resource, Information Technology, Procurement and Outsourcing to get the overall picture of the knowledge flow in the banking sector. The result of the study revealed that Combination phase is with low standard deviation value of 1.01, followed by Socialization with standard deviation of 1.17 and Externalization and Internalization have a similar standard deviation of 1.22. From this, we can understand that the bank has relatively in a good position in synthesizing explicit knowledge from the existing explicit knowledge to come up with organizational knowledge. However, the culture of tacit-to-explicit and explicitto- tacit knowledge sharing is minimal. The major barrier to share knowledge among employees of the Bank is lack of time for externalizing existing knowledge and internalizing new knowledge. As a result, the Bank needs to arrange appropriate time for enabling knowledge sharing practice among employees. Further research directions are recommended to enhance knowledge sharing in Commercial Bank of Ethiopia.
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    Landuse/Cover Dynamics and Selection of Suitable Site for Water Harvesting Structure: The Case of Ziquala Watershed, Wag Himra Zone
    (Addis Ababa University, 2010-06) Mohammed, Habtamu; Ayenew, Tenalem (Prof.)
    The study area Ziquala Watershed located at a distance of about 760 km from the capital Addis Ababa city covers an area of about 759 km' . It is one of the drought p;one areas in the country. It is found in drought prone areas of the Wag Himra Zone. The area is charocterized by scarcity of water even during the rainy seasons. Agriculture predominantly animal rearing is the main stay of the area. Water harvesting structures are extremely important to conserve precious natural resource like, soil and water, which is depleting day by day at on alarming rate. GIS offers a powerful tool for mapping potential sites for rainfall harvesting. Selection of suitable sites for artificial recharge and water harvesting structures needs a large volume of multidisciplinary data from various sources. Remote sensing is of immense use for natural resources mapping and generating necessary spatial database required as input for GIS analysis. The most affecting factors on mapping the poten tial sites: landuse, soil, geological formation, drainage density and slope respectively. The main objective of this study is to evaluate the landuse/cover change and select and mop suitable sites for different water harvesting structures tor Ziquala watershed. Landuse/cover was prepared using supervised classification of Landsat imageries of three different years. Post classification analysis was used to reveal the change in landuse/cover during the study periods. During 1988-1999 period more change occur on bareland decreasing by -32.63% and bush land/shrub land increasing by 28.53%. The water harvesting structures considered for this study area are check dam, farm pond, semi-circular bund and contour bund. Multi-criteria evaluation (MCE) method was used to identify suitable sites for WHSs. Weight was given based on their relative importance for individual WHS. Check dam with 48.33% has higher coverage fallowed by contour bund, semi-circular bund and farm pond having 2.8%, 1% and 1% coverage respectively. The remote sensing and GIS technique proved to be effective for generating thematic layers, facilitating, analysing and derivation of database management and results. Key word: GIS, Landuse/cover change, MCE, Remote sensing, suitability, Water harvesting
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    Urban Landscape Dynamics and the Implication on Surface Urban Heat Island: The Case of Hawassa Town and Surrounding Area, Ethiopia
    (Addis Ababa University, 2018-11) Mohammed, Habtamu; Berhan, Gessesse (PhD)
    The Hawassa Town was experienced a rapid urban expansion over the past two decades because of accelerated economic growth and increase in population which resulted in unplanned urbanization. Due to this, land use land cover change has been formed and will result environmental problems and challenges. To notice the above-mentioned problems, exploring the land use land cover dynamics which will finally resulted in the emergency of Urban Heat Island (UHI) will be assessed that will value` both the communities and local government in the cities. This research work was conducted on the relationship between land use transformation and its implication on land surface temperature change at the heart of rift valley, Hawassa Town, Ethiopia. Remote sensing, GIS techniques and statistical methods were mainly employed for data analysis. A series of Landsat data was used to assess and analyze urban landscape dynamics and land surface temperature. It does so by generating land use land cover maps derived from Landsat 5 TM for 1986, 1998 and 2010, and Landsat 8 OLI for 2017, using supervise classification techniques. Spatial pattern analysis of LST was performed using thermal band of landsat images. Cross tabulation methods, regression analysis and hotspot analysis was employed to study to urban landscape dynamics and land surface temperature. Based on the analysis done, it was obtained that the areal extant of urban (built-up) area has increased considerably by 121.68%.The increasing difference of Surface Heat Intensity (SHIn) between urban area and non-urban area was distinguished. For instance, non-urban area was cooler than the urban area except the agriculture sector. As per calculation performed, the difference of the mean of hotspot and mean of cold spot areas ranged from 8.8 °C to 14.37 °C. Therefore, increasing surface heat intensity was observed between 1986 and 2017. The surface temperature was found to be greater for agriculture and urban (built-up) land use land cover types. Finally, it has been concluded that, with rapid urbanization, surface thermal intensity increased but relationships with vegetation, water bodies and swampy area suggest that optional for mitigating urban warming in tropical climate may be available. The use of hotspot analysis and the investigations of the Urban Heat Island (UHI) will fill the research gaps for the rest of Ethiopian city for studies of urban thermal variations.