Browsing Faculty of Engineering and Technology by Title
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Ssegawa, J.K. (University of Botswana, http://www.ub.bw, NaN, 1999)[more][less]
Abstract: By the turn of the century, Botswana will be 34 years old as an independent nation. Reflecting on the past, is a background of tremendous achievements from a socio-economic development perspective. The achievements could not have been possible if it was not for the contribution. The construction industry’s (CI) contribution to socio-economic development may be viewed from many areas, among them, creating employment, wealth and demand for manufactured goods, infrastructure and producing factors of production (e.g. office space, factory shells, roads, etc) for other sectors. However, the relationship between the general economy and the CI has not been established explicitly despite numerous studies. Using Botswana’s CI and the economy, some of the paradigms proposed in previous studies revisited. URI: http://hdl.handle.net/10311/843 Files in this item: 1
Ssegawa_BJT_1999.pdf (1.185Mb) -
Ssegawa, J.K. (University of Botswana http://www.ub.bw, NaN, 1999)[more][less]
Abstract: By the turn of the century,Botswana will be 34 years old as an independent nation. Reflecting on the past, is a background of tremedous achievements from a socio-economic development perspective.The achievement could not have been possible if it was not for the contribution from the various sectors of the economy, such as mining, agriculture, manufacturing and of course, construction. The construction industry's (CI) contribution to socio-economic development may be viewed from many areas, among them, creating employment, wealth and demand for manufactured goods, infrastructure and producing factors of production(e.g. office space, factory shells, roads, etc.) for other sectors. However, the relationship between the general economy and the CI has not been established explicitly despite the numerous studies. Using Botswana's CI and the economy, some of the paradigms proposed in previous studies revisited. URI: http://hdl.handle.net/10311/706 Files in this item: 1
Ssegawa_BJT_1999.pdf (1.950Mb) -
Oladiran, M. T. (Institute of Electrical and Electronics Engineers (IEEE), http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=13, August NaN, 1999)[more][less]
Abstract: This paper presents the results of an investigation to determine the level of continuing professional development (CPD) for engineers in developing countries. Questionnaires were administered randomly to engineers of different specialties. It was found that CPD for engineers in developing countries seems neglected. Experience and state of the art in the profession are, thus, not usually acquired in an organized fashion. Nevertheless, many of these engineers would support the introduction of continuing professional development at all levels of their careers. URI: http://hdl.handle.net/10311/666 Files in this item: 1
Oladiran_IEEETE_1999.pdf (763.3Kb) -
Uziak, J.; Gizejowski, M. (University of Botswana, NaN, 2009)[more][less]
Abstract: A new design developed by the authors that gives an opportunity to account for the interaction of different modes of buckling is presented.Eurocode 3 model is used as the reference model, an equivalent geometric imperfection comprising of an initial bow being equal to the length divided by 500 is used.The model is based on the design criterion referred to the individual chord components. It allows to avoid the application of complicated procedure based on an explicitly given imperfection parameter. It is achieved by a treatment of a chord local buckling mode between lacing connections in the same way as the plate buckling of chord sectional elements.The buckling design of the compound number can therefore be carried out in the same wayas for a single element provided that the stiffness of lacing members is properly taken care of. URI: http://hdl.handle.net/10311/610 Files in this item: 1
Uziak_BJT_2009.pdf (1.086Mb) -
Moalosi, R.; Popovic, V.; Hickling-Hudson, A.R. (Springer http://www.springerlink.com/index/4p70461149163718.pdf, NaN, 2010)[more][less]
Abstract: There is little in-depth research that can assist designers to use culture as a catalyst for designing innovative products within Botswana’s context. The concept of culture and design are intertwined, thus modifications stemming from cultural evolution both reflect and determine developments in design. The paper discusses an experimental design approach conducted at the University of Botswana and participants challenge was to transform and encode socio-cultural factors into product design features. The paper concludes by discussing a model which has shown one way concerning how to consciously specify, analyse and integrate socio-cultural factors in the design process. URI: http://hdl.handle.net/10311/528 Files in this item: 1
Moalosi_IJTD_2010.pdf (1.365Mb) -
Batane, N.R.; Morrison, D.J.; Moosbrugger, J.C. (Elsevier, www.elsevier.com, NaN, 2010)[more][less]
Abstract: The axial–torsional cyclic deformation behavior of polycrystalline nickel was investigated by performing fully reversed plastic strain amplitude controlled fatigue experiments at effective plastic strain amplitudes ranging from 1×10−4 to 1×10−3. Experiments were accomplished under proportional and 90◦ out-of-phase nonproportional loading paths. Results indicate that loading path has very little effect on the cyclic response at the lower effective plastic strain amplitude. However, at the higher effective plastic strain amplitude, significant additional hardening is induced by the nonproportional loading path. Description: some symbols may not appear as in the original abstract. URI: http://hdl.handle.net/10311/847 Files in this item: 1
Batane_MSE_2010.pdf (613.9Kb) -
Batane, N.R.; Morrison, D.J.; Moosbrugger, J.C. (Elsevier http://www.linkinghub.elsevier.com/retrieve/pii/S135964620800064X, NaN, 2008)[more][less]
Abstract: Results are presented on the effects of biaxial straining on the cyclic stress–strain response of ultrafine grain nickel (grain size 260 nm) and conventional grain nickel (grain size 50 lm) over a range of effective plastic strain amplitudes from 1 10 4 to 1 10 3. Grain refinement causes an increase in saturation stress. For conventional grain nickel, non-proportional straining causes higher saturation stress than proportional straining; but the ultrafine grain material exhibits the opposite behavior. URI: http://hdl.handle.net/10311/662 Files in this item: 1
Batane_SM_2008.pdf (586.5Kb) -
Yanev, K.M.; Obok Opok, A.; Litchev, A. (University of Botswana, www.ub.bw, NaN, 2004)[more][less]
Abstract: Maintenance of the proper power factor is a very important matter for the industry and for the economy of any country. A study of the power factor value for a number of industrial plants in Botswana shows that they operate at power factors lower that the optimal values. If a plant power factor is different from its optimal value, this will cause considerable loses in terms of investments for large power generation and supply equipment and in terms of heat dissipation from the supply lines and other equipment. To improve the power factor and keep it at an optimal value, there are a number of preventative measures, as well as corrective actions that could be implemented. The power factor of a plant changes, depending on the number of electrical units operating at a time. After a full analysis of the power factor issue and its optimal case, are automatic control is designed that may maintain the power factor of a plant within values close to optimal. Similar automatic power factor control system can be introduced for all industrial plants with unsatisfactory power factor throughout the country that can improve considerably the efficiency of power utilization. URI: http://hdl.handle.net/10311/1062 Files in this item: 1
Yanev_BJT_2004.pdf (1.049Mb) -
Oladiran, M.T.; Foster, J. (Trans Tech Publications http://www.scientific.net/AMR.62-64.551, NaN, 2009)[more][less]
Abstract: A team of academics produced a Design Brief (DB) to assist architects design a scholarly physical environment for modern engineering education and research. The information gathered from external and internal sources was used to define important themes that the buildings should reflect and hence to arrive at a list of the required spaces. Critical internal and external reviews and budget constraints led to a series of successive refinements of the DB. A design competition was organised for all interested architects in the country to select the architect for the project and consolation prizes were awarded to second and third finalists. The planned development will provide 17900 m2 and 25200 m2 net usable space and estimated gross building area respectively. URI: http://hdl.handle.net/10311/599 Files in this item: 1
Oladiran_AMR_2009.pdf (635.7Kb) -
Anderson, G.O. (IEEE http://www.saiee.org.za/publications/2008/sept/99-3-4.pdf, NaN, 2008)[more][less]
Abstract: The paper gives detailed analyses to help determine the increase in production costs due to the transmission of reactive power. On the basis of that and with due consideration to the cost of VARS compensation equipment, a mathematical model is developed to determine an economically justified transmission distance for VARS in electric power systems. Standard voltages and line parameters are used for the computations. MATLAB computer programming is used to obtain the numerical results. The developed mathematical model and the numerical results could be useful to electric power systems engineers. URI: http://hdl.handle.net/10311/414 Files in this item: 1
Anderson_SAIEE_2008.pdf (425.7Kb) -
Mwewa, W.L. (University of Botswana, www.ub.bw, NaN, 1999)[more][less]
Abstract: The demand for adequate training of artisans and apprentices in the construction industry cannot be over emphasized in view of the rapid changes the industry is undergoing. Many of of these changes are continously taking place especially in the areas of utilization and maintainability of construction materials. The local vocational institutions should vigorously embark on reviewing the vocational education and training. This will result in the supply of cadres with acceptible quality of training in order to meet the challenges of the building industry. In spite of the ten years of involvement by the local vocational institutions in the training of artisans and apprentices there is still shortage of skilled manpower. The aim of the paper, therefore, is to assess the relevance of the vocational training programs and the trends of output of artisans and apprentices trained before and after the second construction boom from boom from 1986 to 1990 and 1992 to 1996. URI: http://hdl.handle.net/10311/882 Files in this item: 1
Mwewa_BJT_1999.pdf (1.091Mb) -
Dimitrova, J.; Slivkov, G. (University of Botswana, Faculty of Engineering and Technology, http://ajol.info/index.php/bjt, April NaN, 1998)[more][less]
Abstract: This paper presents an examination of the possibility of using wind turbines generating electricity for households in the remote rural areas of Botswana. On the basis of theoretical consideration of the wind system generating electricity, and the power demands of a typical Botswana rural household, some types of possible advanced systems are recommended. Comparative information is given about the costs of solar (photovoltatic) and wind power systems. From an analysis of the magnitude and the distribution of the wind in Botswana, conclusions are made about the areas where the wind system for electricity generation could be used during the whole or part of the year. URI: http://hdl.handle.net/10311/664 Files in this item: 1
Dimitrova_BJT_1998.pdf (2.728Mb) -
Loukanov, I. A.; Uziak, J.; Michalek, J. (Czech Academy of Agricultural Sciences http://agriculturejournals.cz/web/RAE.htm, NaN, 2005)[more][less]
Abstract: The power requirement of tillage implements is an important design consideration particularly for animal-drawn implements where the power is limited. The paper presents the possibility of reduction in the draught requirements of animal-drawn mouldboard plough by using enamel coating on the soil-engaged components such as the mouldboard, share and the landside. Trials were conducted to compare enamel-coated Maun Series single mouldboard plough (manufactured by Zimplow Limited, Bulawayo, Zimbabwe) with similar uncoated plough, both animal-drawn, under comparable working conditions. Experiments were done at 25% and 32% d.b. soil moisture content on a red clay soil in Zimbabwe. The parameters measured in evaluating the draught performance of both ploughs were the tractive effort(pull),speed of ploughing,depth and width of ploughing,and soil conditions(i.e.soil moisture content,soil bulk density and soil penetration resistance). It was found that for similar working conditions the enamel coating reduced the specific draught by 20 to 26% depending upon soil moisture content. URI: http://hdl.handle.net/10311/705 Files in this item: 1
Uziak_RAE_2005.pdf (504.4Kb) -
Anderson, G.O.; Mokgwathi, T.S. (University of Botswana, NaN, 2000)[more][less]
Abstract: Engineering and training play an important role in the technical, economic and social progress of society.A number of factors influence the education and training of engineers, from the nature and form of curricular to needs of employers and the changing patterns of professional employment. Key issues are being raised by changes in technology, in society and by the impact of developments in information technology on industry and commercial development, on the engineer profession, on the educational institutions and on education and training of engineers. The paper considers the education and training of engineers using data and information from the Faculty of Engineering and Technology(FET), University of Botswana as a case study. Historical background is introduced.Student enrolment in terms of gender and foreign students are presented.Also presented are the academic programs and staff structures.The goals of the Faculty have been highlighted and strategies to be applied to achieve these goals have been recommended. The paper could be of interest to staff of FET and UB, Engineering Institutions in Africa and also to the Botswana Ministry of Finance and Manpower Development. URI: http://hdl.handle.net/10311/674 Files in this item: 1
Anderson_BJT_2000.pdf (1.982Mb) -
Abadjieva, T. (University of Botswana, NaN, 1998)[more][less]
Abstract: Investigations of the influence of various factors on the modulus of elasticity and deformability of different types of lightweight concrete are presented.The results show that the modulus are not constant and decrease with the increase of the level of applied stress. Aggregate proposity and volume fraction effects the modulus of elasticity and the modulus of deformability of concrete. Using different concrete mixes of varying strength, it was confirmed that the the modulus of elasticity and the comprehensive strength of concrete are directly proportioned. The modulus of elasticity per unit strength decreases with the age of concrete. As lightweight concrete is a heterogeneous, multiphase material, the volume fraction and modulus of elasticity of the principal constituents influence the modulus of elasticity of the composite material. URI: http://hdl.handle.net/10311/611 Files in this item: 1
Abajieva_BJT_1998.pdf (1.208Mb) -
Oladiran, M.T.; Meyer, J.P. (Elsevier http://www.elsevier.com, NaN, 2007)[more][less]
Abstract: The energy-utilization over a 10-year period (1994–2003) has been analysed for the South African industrial sector, which consumes more primary energy than any other sector of the economy. Four principal sub-sectors, namely iron and steel, chemical and petrochemical, mining and quarrying, and non-ferrous metals/non-metallic minerals were considered in this study. Primary-energy utilization data were used to calculate the weighted mean energy and exergy efficiencies for the sub-sectors and then overall values for the industrial sector were obtained. The results indicate that exergy efficiency is considerably lower than energy efficiency in all the sub-sectors, particularly in mining and quarrying processes, for which the values were approximately 83% and 16%, respectively. The performance of exergy utilization in the industrial sector can be improved by introducing various conservation strategies. Results from this study were compared with those for other countries. URI: http://hdl.handle.net/10311/957 Files in this item: 1
Oladiran_AP_2007.pdf (792.0Kb) -
Meyer, J.P. (Elsevier Science Ltd, http://www.elsevier.com/locate/apenergy, NaN, 2007)[more][less]
Abstract: The energy-utilization over a 10-year period (1994–2003) has been analysed for the South African industrial sector, which consumes more primary energy than any other sector of the economy. Four principal sub-sectors, namely iron and steel, chemical and petrochemical, mining and quarrying, and non-ferrous metals/non-metallic minerals were considered in this study. Primary-energy utilization data were used to calculate the weighted mean energy and exergy efficiencies for the sub-sectors and then overall values for the industrial sector were obtained. The results indicate that exergy efficiency is considerably lower than energy efficiency in all the sub-sectors, particularly in mining and quarrying processes, for which the values were approximately 83% and 16%, respectively. The performance of exergy utilization in the industrial sector can be improved by introducing various conservation strategies. Results from this study were compared with those for other countries. URI: http://hdl.handle.net/10311/668 Files in this item: 1
Oladiran_AE_2007.pdf (589.3Kb) -
Oladiran, M.T. (Elsevier Science Ltd, http://www.elsevier.com/wps/find/journaldescription.cws_home/269/description#description, NaN, 1995)[more][less]
Abstract: Botswana depends heavily on imported petroleum products for all premium applications. However, there is an abundant reserve of coal and other alternative sources of energy. This paper presents the energy trends and the various options for harnessing the resources. The importance of energy conservation is also discussed. URI: http://hdl.handle.net/10311/670 Files in this item: 1
Oladiran_ECM_1995.pdf (958.6Kb) -
Uziak, J.; Loukanov, I. A. (Dalhousie University, NaN, 2009)[more][less]
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Foster, J. D. G. (Tempus Publications http://www.ijee.ie/, NaN, 2002)[more][less]
Abstract: The economy of Botswana has grown rapidly since it became independent in 1966, but the population is only 1.7 million. Engineering construction projects are of large scale. The University of Botswana offers engineering degrees in four disciplines, under programs that cover ten semesters. The particular challenges to engineering education in Botswana, as well as the structure of the present and future University of Botswana programs, are described in this paper. Emphasis is placed on a wide range of student individual investigation and design work, and the benefits of a particular project to the student and the program are stated in an illustration. URI: http://hdl.handle.net/10311/704 Files in this item: 1
Uziak_IJEE_2002.pdf (769.0Kb)