Browsing by Issue Date
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Rao, M.V.C. (University of Botswana, http://www.ub.bw, NaN, 2000)[more][less]
Abstract: This paper describes a new method of determining the feedback coefficients in a state variable feedback system, given the closed loop transfer function, making use of the transfer function between different and relevant points in the feedback configuration used to realize the desired closed loop transfer function, formulas that can be repetitively used to determine the feedback coefficients are desired. The usefulness and simplicity of these methods are demostrated by illustrative examples where the plant has complex poles, coincident poles and zeros and even when the plant is unstable. URI: http://hdl.handle.net/10311/756 Files in this item: 1
Rao_BJT_2000.pdf (976.8Kb) -
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) -
Nair, S.; Vokolkova, V.; Abadjieva, T.; Michalek, J. (University of Botswana, NaN, 2000)[more][less]
Abstract: The percentage of students, especially women in engineering, is very low in Botswana and the country is still heavily dependent upon foreign human resources.The objective of this research has been to study the gender differences in education,which might have caused the current poor representation of women in engineering.The secondary school results of 749 students were statistically analyzed per gender.Three main factors were identified by factor analysis:The science-ability, the general aptitude and the memory ability factor.As to the general aptitude and the memory ability,it was found that no statistically significant difference between boys and girls exists.However, there is a difference in the science-ability factor. To strengthen this factor for girls,it requires to make the study of mathematics and science courses attractive to girls at early stage so that they are not limited in their options at the level of secondary education and thus in their career choice. URI: http://hdl.handle.net/10311/647 Files in this item: 1
Nair_BJT_2000.pdf (1.021Mb) -
Nair, S.; Vokolkova, V.; Abadjieva, T. (University of Botswana, NaN, 2000)[more][less]
Abstract: The percentage of students, especially women in engineering, is very low in Botswana and the country is still heavily dependent upon foreign human resources. The objective of this research has been to study the gender differences in education, which might have caused the current poor representation of women in engineering.The secondary school results of 749 students were statistically analyzed per gender. Three main factors were identified by factor analysis: the science ability, the general aptitude and the memory ability factor.As to the general-aptitude and memory ability factor, it was found that no statistically significant difference between boys and girls exists. However, there is a difference in the science-ability factor. To strengthen this factor for girls, it requires to make the studies of Mathematics and Science courses attractive to girls at early stage so that they are not limited in their options at the level of secondary education and thus in their career choice. URI: http://hdl.handle.net/10311/624 Files in this item: 1
Nair_BJT_2000.pdf (1.543Mb) -
Kiravu, C.S.A.M. (University of Botswana, NaN, 2000)[more][less]
Abstract: Computer models are used to replicate the essential performance features of a physical element using convenient modeling and simulation programs. Within SPICE, an acronym for the Simulation Program with Integrated-Circuit Emphasis, a model for the twin-depencence of the machine's open circuit generated e.m.f. on the time-independent flux and machine speed has not been investigated. This paper describes a steady state model of an open circuit DC shunt machine using PSPICE, the PC version of SPICE packaged within the OrCAD programming environment. The model is based on characterization of the generated e.m.f.as field current dependent polymial voltage source whose coeffecients are generated within MATHCAD by applying a linear regression fit on a set of experimental laboratory data points. The simulation results are displayed using the inbuilt graphic postprocessor within PSPICE called PROBE. This results show good replicative model validity within the laboratory range of exciting currents used in the simulative. URI: http://hdl.handle.net/10311/621 Files in this item: 1
Kiravu_BJT_2000.pdf (849.3Kb) -
Sahu, B.K.; Jayaram, S. (University of Botswana, NaN, 2000)[more][less]
Abstract: Alarmingly high accumulation of fly ash has led geochemical engineers into finding a solution for the use of flyash as a construction material in the recent past. As of now, although the material has been used in a limited way in the construction of roads, embarkments,dykes and by cement industries, most of it is still dumped as a waste material. There is a general opinion mongst teh Geochemical engineers that fly ash is a non-hazardous material. However, the authors felt that it may not be entirely true due to the fact that fly ash does contain quite a significant proportion of soluble salts. These salts would leak into water if fly ash comes into contact with water or if the ground water leaked through a bed of fly ash. The investigation revealed that Dissolved Oxygen of fly ash polluted tap and clean water is reduced to a level far below the permissible limit for aquatic life. The author would like to emphasise that the findings of the present investigation are being submitted to open an agenda on the issue of water pollution by the fly ash leachate, may it be ground water, water in the vicinity of the ash being used in the construction of dykes,dams, river training structures or for reclamation on sea shores. URI: http://hdl.handle.net/10311/601 Files in this item: 1
Sahu_BJT_2000.pdf (863.8Kb) -
Barei, G. (University of Botswana, Research and Development Unit/http://digital.lib.msu.edu/projects/africanjournals/browse.cfm?colid=12, NaN, 2000)[more][less]
Abstract: This article focuses on three districts of Botswana, namely Central District, Ngwaketse District and Kgatleng District. It argues that as a result of the role played by the institution of chieftainship in elections, certain voting paltems that are discussed in the conceptual framework can be associated with it. The extent to which chieftainship has influenced electoral outcomes varies from one area to another. URI: http://hdl.handle.net/10311/508 Files in this item: 1
Barei_PBJAS_2000.pdf (1.504Mb) -
Mutshewa, A.; Rao, K.N. (Emerald, NaN, 2000)[more][less]
Abstract: Libraries are changing their modes of delivery at a very fast rate. This article describes how the University of Botswana library has advantage of the new technologies to enhance its service to its patrons. The University local network is used to bring library electronic resources to the desktops of the patrons in their offices. URI: http://hdl.handle.net/10311/423 Files in this item: 1
Mutshewa_LHT_2000.pdf (563.3Kb) -
Goodwin, J.W.; Hughes, R.W.; Kwaambwa, H.M.; Reynolds, P.A. (Elseview Science B.V. www.elsevier.nl/locate/colsurfa, NaN, 2000)[more][less]
Abstract: A series of well characterised cis-polyisoprene polymers have been added to dispersions of PHS coated PMMA particles in dodecane. At a molecular weight of 8000 g mol−1 and above, these systems showed phase separation at low particle volume fractions and above a critical polymer concentration. The rate of separation has been shown to be influenced by the viscosity of the polymer. At high polymer and particle volume fractions long lived metastable phases occurred. Above a critical concentration these were viscoelastic indicating an appreciable change in diffusion dynamics with two relaxation processes present. A significant Bingham yield stress was also observed. The Asakura Oosawa potential was not able to describe the observed rheological properties. At a molecular weight of 1000 g mol−1 no phase separation was observed. At high particle concentrations the yield stress was found to reduce with the addition of polymer. This was due to the polymer acting as a ‘solvent’ and penetrating the stabilising layer on the particles. URI: http://hdl.handle.net/10311/329 Files in this item: 1
Phase separation behaviour.pdf (2.723Mb) -
Ngowi, A.B. (MCB University Press, http://www.emerald-library.com, NaN, 2000)[more][less]
Abstract: Total quality management (TQM) as an integrated approach to management that represents a holistic management philosophy, rather than a series of techniques, is embedded with cultural values and assumptions that are consistent with its culture of origin. This study aims to determine the outcome of implementing TQM in a place that does not share its cultural base. A survey of 100 construction firms in Botswana found that, although the values embedded in TQM could be adopted within the organisations into which it is implemented, the cultural context of the greater society resisted some of the values. It was concluded that, for TQM to be successful in a particular cultural setting, it has to take on some of the host cultural values URI: http://hdl.handle.net/10311/350 Files in this item: 1
Ngowi_2000_JEIM.pdf (915.4Kb) -
King, J G; Ranganai, RT (BOSHASTED, NaN, 2000)[more][less]
Abstract: Emissions of vehicles represent a significant contribution to environmental pollution along roads. Pollutants from cars include gases such as (NOx, CO, CO2), solid components such as sort particles from exhaust system, abrasion products from the brakes and engine etc (Leven et al., 1999). Aerosols pollutants can reduce significantly the quality of the environment and seriously affect human health e.g. by contributing to high rates of allergies or diseases of the respiratory system. In this study, samples were collected at various distances from a busy road, Gaborone-Tlokweng road near Game store. Non-magnetic adhesive paper pieces were used as sample collectors. Magnetic properties of the aerosols collected were measured using a highly sensitive magnetometer (AGM-Micromag). Magnetic properties measured include total magnetic moment, hysteresis loops and associated parameters such as coercivity. In general, observed hysteresis loops are typical for magnetite. URI: http://hdl.handle.net/10311/406 Files in this item: 1
King_BOSHASTED_2000.pdf (159.1Kb) -
Ngowi, A.B. (MCB University Press; Emerald Publishing Group Ltd; http://www.mcbup.com/research_registers/quality.asp, NaN, 2000)[more][less]
Abstract: Total quality management (TQM) as an integrated approach to management that represents a holistic management philosophy, rather than a series of techniques, is embedded with cultural values and assumptions that are consistent with its culture of origin. This study aims to determine the outcome of implementing TQM in a place that does not share its cultural base. A survey of 100 construction firms in Botswana found that, although the values embedded in TQM could be adopted within the organisations into which it is implemented, the cultural context of the greater society resisted some of the values. It was concluded that, for TQM to be successful in a particular cultural setting, it has to take on some of the host cultural values. URI: http://hdl.handle.net/10311/170 Files in this item: 2
license.txt (1.998Kb)ngowi1.pdf (97.37Kb) -
Chilisa, B. (Routledge. http://www.informaworld.com, March 1, 2000)[more][less]
Abstract: This article explores definitions of achievement and their relationship to gender-fair assessment. A framework to discuss achievement is drawn from the affinities of standpoint theory and post-structural theories' emphasis on the role of language in transmitting norms and values that shape gender relations. The first proposition put forward is that different modes of assessment denote different forms of knowledge that are not necessarily gender-neutral. The article illustrates the argument by identifying patterns of gender-biased items in the Junior Certificate science examinations in Botswana. The conclusion drawn is that these patterns illustrate forms of knowledge that are representative of male and female ways of perceiving reality. The patterns of gender-biased items corroborate those found in the international literature. The second proposition is that assessment materials may be gender-biased. The article illustrates gender bias through a content analysis of the Junior Certificate English reading passage examination and discusses the implications of this example for fairer assessment. Finally, a checklist is suggested for crafting gender-fair assessment. URI: http://hdl.handle.net/10311/834 Files in this item: 1
Chilisa_AEPPP_2000.pdf (1.143Mb) -
Oduaran, A. (Taylor & Francis, http://www.tandf.co.uk/journals, May NaN, 2000)[more][less]
Abstract: The global phenomenon called globalization frequently offers justifications for socio-economic and political actions aimed at bringing rapidly into fruition the "Global Village" which Marshall McLuhan had anticipated decades ago. Both the 1972 UNESCO sponsored Commission Report chaired by Edgar Faure and that of 1996 chaired by Jacques Delors produced important documents which, as at other times, reviewed issues and priorities in education worldwide, in spite of the obvious extreme diversity in socio-economic, political and educational situations, conceptions and structures. As always, UNESCO had been concerned about the numerous and vibrant challenges the future holds in store for everyone. In doing so, lifelong education has been identified as one of the indispensable assets available to us in the pursuits which regularly bring into the fore the concern for equality, equity and, indeed, human reasonableness. As the world pursues the ideals and objectives of globalization, the need arises for a timely reassessment of positions especially in the context of consequences and challenges that are inherent. This paper seeks to examine globalization in the context of some of the major challenges it poses for Africa. In particular, it proposes how lifelong education might be structured to assist Africans in comprehending, evaluating and possibly, participating comparatively effectively in the relations implied in globalization rather than standing aloof and becoming hapless objects. URI: http://hdl.handle.net/10311/1042 Files in this item: 1
ODUARAN_IJLE_2000.pdf (1.785Mb) -
Mnjama, N. (SAGE Publications, http://idv.sagepub.com, June NaN, 2000)[more][less]
Abstract: More and more companies in the developing world are desiring to export their products to the western world. How ever, in as much as the western world would wish to trade with developing countries, they need some assurance that the products are of the highest possible standards. To date the only standards that are recognized by both western and developing countries are ISO standards. The certification process demands among other things an assurance by the supplier that he (the supplier) has a well documented, effective and efficient procedures for maintaining all records pertaining to its products. This article looks at the case of Botswana Meat Commission, one of the major exporters of beef products in Africa, and shows the procedure it has followed to establish a quality system for managing its records. URI: http://hdl.handle.net/10311/703 Files in this item: 1
Mnjama_ID_2000.pdf (560.8Kb) -
Mapeo, R.B.M.; Kampunzu, A.B.; Armstrong, R.A. (Geological Society of South Africa. http://sajg.geoscienceworld.org/, June NaN, 2000)[more][less]
Abstract: The Precambrian rocks of northern Botswana comprise poorly exposed igneous complexes, high-grade metamorphic rocks, as well as sedimentary sequences including mainly siliciclastic and carbonate rocks. New U-Pb SHRIMP data are presented for detrital zircons from siliciclastic rocks collected from the Shakawe area in northern Botswana. These data show three main age groups at c. 1020 Ma, 1090 Ma, and 2050 Ma which support contentions for local provenance of the sediments. They also fix the maximum age of the deposition of these siliciclastic rocks at 1020 Ma. The results support field evidence suggesting that the siliciclastic rocks exposed in the Shakawe zone are part of the Ghanzi-Chobe Supergroup. URI: http://hdl.handle.net/10311/371 Files in this item: 1
mapeodoc.pdf (1.611Mb) -
Mahgoub, S.E.O.; Chilisa, B.; Lombe, C. (AFAHPER-SD; see http://www.ajol.info/journal_index.php?jid=153, October NaN, 2000)[more][less]
Abstract: This study examined the weight control perception and the factors associated with it among female adolescents in Gaborone, Botswana. The subjects were two hundred and twenty 15-17 year-old students from five Community Junior Secondary schools in Gaborone, representing 7 ethnic backgrounds with 75% of them being Batswana... URI: http://hdl.handle.net/10311/221 Files in this item: 2
license.txt (1.998Kb)Mahgoub_AJPHERD_2000.pdf (1.244Mb) -
Disele, P.L.P.; Peters, S.; Masoloko, T.; Shumba, A. (Office of Research and Development, University of Botswana; http://www.ub.bw, NaN, 2001)[more][less]
Abstract: The new millennium has come but we are not healthy: the Human Immuno-deficiency VIruS (HIV) IS taking its toll. It is critical for everyone to find ways of coping with this problem, along side campaigns to eradicate the virus. There is need to explore the power of nutrition in boosting the immune system. URI: http://hdl.handle.net/10311/1148 Files in this item: 1
Disele_PBJAS_2001.pdf (426.5Kb) -
Onibere, E.A.; Morgan, S.; Busang, E.M.; Mpoeleng, D. (Elsevier Science Ltd, www.elsevier.com/locate/intcom, NaN, 2001)[more][less]
Abstract: This paper reports on research carried out to determine whether a localised interface is preferred by users in a multi-cultural and multi-lingual country where a non-local language is nationally used,. We attempted to discover whether local symbols are more acceptable to users as icons and also whether the current phrases used in menus and icon descriptions are clearly understood by the various communities. A survey was conducted nation-wide among computer end-users in Botswana. The results indicate an overwhelming desire from users for a localised interface. However, there appears to be little need for localised icons and no agreement as to which language to use for text-based interfaces. URI: http://hdl.handle.net/10311/887 Files in this item: 1
Mpoeleng_IC_2001.pdf (1.247Mb) -
Jain, P.; Mutula, S.M. (Sage Publications, www.sagepub.com, NaN, 2001)[more][less]
Abstract: Presents the findings of a questionnaire survey carried out to determine the scope of IT diffusion in Botswana in the context of the National Vision 2016. The study was aimed at establishing the extent of IT use in the country; identifying the constraints and opportunities of IT diffusion and recommending the way forward. The target population comprised of IT-related government departments, IT training institutions, IT vendors and IT-oriented parastatals. The survey was confined to the capital, Gaborone and produced a response rate of 90 percent. The results showed that 98 percent of participants believed that the scope for IT diffusion in the country was good. However, several constraints were identified, including lack of skilled manpower, lack of IT policy, inadequate IT infrastructure, inadequate private sector participation, tendering procedures that favour foreign companies more than local companies, absence of clear mission statements for IT diffusion within organizations, lack of understanding of the use of IT by management and fear of retrenchment by staff. URI: http://hdl.handle.net/10311/842 Files in this item: 1
Jain_ID_2001.pdf (916.6Kb)