Browsing by Author "Getachew, Kidane"

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    Air Transport In major Airlines In Africa: Challenges And Prospects
    (Addis Ababa University, 2014-06) Getachew, Kidane; G/Selassie, Kidist (PhD)
    The significance of air transport in promoting growth and development in developing countries is very high. The African air transport industry in general and the African airline industry in particular have faced challenges of a multitude nature. As such this research is conducted to show the challenges and prospects that are faced by major African airlines. One challenge that did not get adequate attention by studies reviewed is the competition African airlines face from foreign airlines. To this effect, the market share of African and Foreign airlines for the period 2006 to 2012 is analyzed in terms of seat capacity and flights per week in their intercontinental and intra-continental operations. Also comments from LinkedIn African aviation discussion forums are used to identify and list out the major challenges of the African air transport. In the intra-Africa operations the African airlines are observed to dominate the market with an average market share of 95%. In the intercontinental operations African airlines have lost an average of 12% seat capacity for Middle East and European carriers. Furthermore interviews with African airlines executives show the fact that the competition from the foreign carriers especially that of the Middle East is at a critical stage. However, the prospect of the African airlines is not gloomy. Given the growing economy and middle class in Africa, Boeing forecasts a growth of 5.7% for African airline traffic. But this is only possible if the African airlines are able to work together and compete with the giant carriers. To this end the African states and airline Association should work together in areas where they can pool resources and improve efficiency
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    Assessment of The Determinant Factors for The Selection of Ballasted Track Versus Slab Track (a case of Addis Ababa Light Rail Transit)
    (AAU, 2016-03) Getachew, Kidane; Mequanent, Mulugeta (Mr.)
    The track is a fundamental part of the railway infrastructure and it is a structure consisting of parallel lines of rails with their sleepers, fittings and fastenings, ballast, etc, to provide a road for the movement of locomotives. The two types of track systems are ballasted track and slab track. Ballasted track consists of track superstructure of rails and sleepers supported on a layer of granular material (stones) and slab track consists of a continuous slab of concrete where rails are supported on the upper surface of the slab. Different scholars had studied the advantages and disadvantages of these track types in relation with different factors. The purpose of this study is to assess and evaluate those determinant factors to select the better affordable track type for the construction of railway line for future expansion of AA-LRT project. The study mainly focuses on the ground/at-grade section of the track. The data for the study were taken from document analysis that has seen under literature review and some supportive data from observation and a few from working documents from AA-LRT project. The data were then analyzed both quantitatively and qualitatively. During this study the construction cost, maintenance cost, ease of adjustment and maintainability in relation with construction and maintenance time with the need of accuracy and precision, track environmental impact in relation with noise and dust emission, weather conditions together with flood and dust problem, and lateral resistance were accessed from document analysis and site observation. The results revealed that slab track is more costly than the construction cost of ballasted track and less maintainability although it has better stability and durability. In addition to this from the transportation demand of the city population and addressing its facility, the study recommended that ballasted track is more affordable than slab track at ground/atgrade section. Furthermore this study also recommended that undertaking different researches regarding these two track types in relation with the county context for both the LRT case and the national railway as well is important.