Browsing by Author "Mbabazi, D."

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    Uganda's National Transmission Backbone Infrastructure Project: Technical Challenges and the Way Forward
    (Fiber and Integrated Optics, 2011) Bulega, T.; Kyeyune, A.; Onek, P.; Sseguya, R.; Mbabazi, D.; Katwiremu, E.
    Several publications have identified technical challenges facing Uganda's National Transmission Backbone Infrastructure project. This research addresses the technical limitations of the National Transmission Backbone Infrastructure project, evaluates the goals of the project, and compares the results against the technical capability of the backbone. The findings of the study indicate a bandwidth deficit, which will be addressed by using dense wave division multiplexing repeaters, leasing bandwidth from private companies. Microwave links for redundancy, a Network Operation Center for operation and maintenance, and deployment of wireless interoperability for microwave access as a last-mile solution are also suggested.
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    Variations and changes in habitat, productivity, composition of aquatic biota and fisheries of the Kyoga lake system: lessons for management
    (African Journal of Aquatic Science, 2013) Ogutu-Ohwayo, R.; Odongkara, K.; Okello, W.; Mbabazi, D.; Wandera, S. B.; Ndawula L. M.; Natugonza, V.
    The Kyoga lake system, which is c. 4 m deep, originally had a diverse fish fauna, extensive macrophytes and wetlands. Most (82%) of its water comes from Lake Victoria, is controlled through three dams and has a short residence time of c. 3 months. Physical and chemical factors, plankton productivity and composition vary across the lake from east to west. The macrophyte cover decreased after the heavy El NiƱo rains of 1961, and the area of wetlands decreased by 48.5% between 1994 and 2008 mainly because of their conversion to agriculture. The main lake was infested with water hyacinth in the 1990s but subsequently this was brought under control. The native fishes were overexploited and non-native fishes, including a top piscivore, Nile perch Lates niloticus L., were introduced and boosted fish production, but they also were overexploited. Nile perch also preyed upon and decimated native species, which survived only in satellite lakes. Populations of some of these species recently have started to recover in the main lake. Efforts should be made to control habitat loss and water-level fluctuations, wetland loss, overexploitation of the fishes, conserve the surviving fish species and address the emerging challenge of climate change.