Department of Agricultural Engineering

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https://repository.udsm.ac.tz/handle/123456789/26

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Browsing Department of Agricultural Engineering by Author "Elias, Erasto"

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    Investigation of Motorcycle Design Improvements with Respect to Whole Body Vibration Exposure to the Rider
    (2015-03) Ndimila, Benjamin W.; Majaja, Bashira A.; Elias, Erasto; Nalitolela, Noel G.
    Various studies on motorcycle rider whole body vibration (WBV) exposure indicate that the vibration magnitude in the vertical direction is the most severe as compared to magnitudes in lateral and transverse directions. For the sake of understanding and doing evaluation of the vibration environment of the motorcycle rider and various motorcycle component bodies, a mathematical model was developed. The main intention was to investigate the physics of motorcycle suspensions, study vibration magnitudes in vertical direction in terms of displacement and acceleration on a cyclist depending on motorcycle and road parameters, also attempt to determine the location of the rider’s seat with least vibration magnitudes. In this case, analytical methods for studying response to harmonic base excitation of the rider and other component bodies of a motorcycle were applied with the aim to analyze their vibrational behaviour. The two wheeled motorcycle with a rider model was introduced. The equations of motion for the model were formulated. The matrix form of the equations was written solved and simulations were done. The vibration behaviour in vertical direction of various component bodies of the motorcycle model was observed.
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    Main Factors Affecting Development and Transfer of Technologies for R&D Institutions in Tanzania
    (2015) Mwanza, J. S.; Elias, Erasto; Majaja, Bashira A.
    Technologies are essential inputs in pursuit of the developmental goals of any country in particular the developing countries to achieve sustainable development and also have a crucial role to play in achieving the Millennium Development Goals. The majority of the local industries in Tanzania use turnkey plants and process machinery imported from abroad for specific production lines. The imported technology may not be completely fit to the local conditions and it is the duty of the R&D institutions to match it with the local needs and conditions. Therefore, one of the major corrective measures required is to promote technology development and transfer from local R&D institutions to industrial enterprises. This paper focuses on how technological capabilities were enhanced by R&D Institutions in the development and transfer of technologies and the results of the enhancement. The discussion of the findings is based on the preliminary data collected from questionnaires and interviews which was administered to R&D Institutions in Tanzania.
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    Promoting Appropriate Technology for Sustainable Development: Case of Agro-processing SMEs in Tanzania
    (2015-02) Mwanza, Jafari; Majaja, Bashira A.; Elias, Erasto