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Ringrose, S.; Vanderpost, C.; Matheson, W. (Taylor & Francis; http://www.tandf.co.uk/journals/titles/01431161.asp, NaN, 1997)[more][less]
Abstract: Attention worldwide has been focused on the need to assess the appropriateness of land management strategies especially where these occur near sensitive areas of wildlife habitat. This work considers the use of mainly Thematic Mapper data in providing an assessment of the relative impact of different land management strategies on the natural vegetation cover in part of the sensitive Okavango area in Botswana. Supervised classification (maximum likelihood) techniques when used on six-band TM imagery showed that differential degradation was prevalent in land management areas, especially where these are separated by fencelines with an overall accuracy 72 per cent. Marginally more degradation is evident in a controlled hunting area adjacent to the Game Reserve, relative to a communal grazing area. Band transform analyses indicate that distinctive changes in cover type and density frequently take place over boundaries or fencelines separating land management areas. Some degradation in the controlled hunting area appears related to the influence of faultlines on the distribution of soil, hence plant community types. In other cases the pattern of degradation is distributed randomly between the Game Reserve and the cordon fence. Reasons for this unusual distribution pattern may lie in the restriction of movement of migratory wildlife species southwards by the cordon fence separating communal grazing from hunting land uses. A more appropriate management strategy may lie in the prediction of wildlife movements, prior to the erection of cordon fences URI: http://hdl.handle.net/10311/173 Files in this item: 1
ringrose_int_j_remote_sensing_1997.pdf (4.553Mb) -
Ngowi, A.B. (Taylor and Francis, http://www.pdfserve.informaworld.com/940578_73138570, NaN, 1997)[more][less]
Abstract: This paper examines the strategy of employing a hybrid combination of indigenous and modern housing construction technologies. Using a Botswana village as a case study, this paper examines four traditional house types in relation to the household income, skills, materials and aspects which could be improved by adapting industrialized methods. Using experimental houses, the case study provides the costs, benefits, potential problems and implementation considerations. The paper discusses the weaknesses and virtues of traditional construction technologies, how appropriate aspects from modern technologies can be incorporated or adapted into traditional methods and the implications for developing appropriate, affordable housing technologies URI: http://hdl.handle.net/10311/370 Files in this item: 1
Ngowi_1997_BRI.pdf (800.7Kb) -
Mogalakwe, M.; Mufune, P.; Molutsi, P. (Taylor and Francis (Routledge), www.taylorandfrancisgroup.com/, NaN, 1998)[more][less]
Abstract: Labour legislation is the unique device governments use to lay down standards and conventions in the workplace and to control industrial relations. Using focused interviews with unionists, government officials, employers and other relevant parties, this field study investigated the way in which labour legislation in Botswana affects the organisation of the country's federation of unions. The findings indicate that the BFTU's organisation is affected by the Trade Union and Employers Organisation Act.In particular, the restrictions in this Act separate policy and administration in the BFTU and this has had negative implications for the union's effectiveness. The fact that its policymaking body is part-time negatively affects coordination, communication and cooperation processes in the BFTU. According to the Act, public sector workers are not technically employees and therefore cannot belong to unions. This gives the impression that the state is not particularly convinced about the benefits of unionisation. This may create a difficult environment in which the BFTU and other unions must operate. URI: http://hdl.handle.net/10311/886 Files in this item: 1
Mogalakwe_DSA_1998.pdf (1.165Mb) -
Nkomazana, F. (University of Botswana, National Institute of Development and Cultural Reseach, http://www.thuto.org/pula/html/pula-home-page.htm, NaN, 1998)[more][less]
Abstract: David Livingstone is often misunderstood as being a conscious promoter of European colonization of Africa. On the contrary, he believed that the key to Africa's future was the stimulation of indigenous development and good government. Such 'civilization' could only be achieved by the combination of Christianity with legitimate commerce, to replace the Slave Trade which had been the bane of Africa's development for centuries. This paper traces the roots of Livingstone's belief in the combination of moral and material betterment, derived from his personal origins and the Evangelical and Anti-Slavery movements. It shows how these ideas matured during his mission days among the BaTswana, during which he began to travel north to the Zambezi and beyond. URI: http://hdl.handle.net/10311/734 Files in this item: 1
NKomazana_PBJAS_1998.pdf (2.757Mb) -
Ganesan, C.T. (University of Botswana, http://www.ub.bw, NaN, 1998)[more][less]
Abstract: This paper is the outcome of students'project guided by the author. An attempt has been made to design and develop a solar still for rose production in India. This unit has the following features:i) possibility of tilt adjustments to suit different altitudes of sun,ii) specially designed steep basin for conveniently keeping the rose petals and water in an inclined position and iii)cover which can be opened to facilitate the cleaning operations. This unit supplied 3.7 litres of rose water in three days during winter in Madras, in India. The sunshine and solar radiation particulars of Botswana are shown to indicate that a better climatic conditions prevail here for a higher production rate. URI: http://hdl.handle.net/10311/684 Files in this item: 1
Gaesan_bJT_1998.pdf (2.287Mb) -
Ketlogetswe, C. (University of Botswana, NaN, 1998)[more][less]
Abstract: Since independence, the economy of Botswana has been undergoing a rapid transition from one in which the majority of the people depend on traditional agriculture and pastoralism to one in which formal sector employment predominates. This is partly reflected by rapid increase in vehicle population. Because of these changes,the country started to experience environmental problems. Unfortunately from the time of independence until late eighties, the level of environmental awareness in the country was very low, and therefore waste minimisation and reduction of environmental impact procedures were never in place.To date, many organizations in the country still seem not to be committed to reducing and disposing their wastes in environmentally friendly manner. The need to reconcile development with environmental concern, thus sustainable development, is vital. For the country to achieve that, an introduction of an environmental impact assessment in Botswana is essential, and thus, the main thrust of the current investigation is to determine the level of concern about environmental problems posed by waste engine oil in various organizations in the country. Management of various organizations were interviewed on their methods of waste of engine oil disposal. It was found that the disposal of waste engine oil by many organizations is resulting in serious environmental problems. URI: http://hdl.handle.net/10311/675 Files in this item: 1
Ketlogetswe_BJT_1998.pdf (1.028Mb) -
Ganesan, C.T. (University of Botswana, NaN, 1998)[more][less]
Abstract: This paper is the outcome of students'project work guided by the author. An attempt has been made to design and develop a solar still for rose water production in India. This unit has the following features:i) possibility of tilt adjustments to suit the different altitudes of sun,ii)specially designed stepped basin for conveniently keeping the rose petals and water in an inclined position and iii)cover which can be opened to facilitate the cleaning operations.This unit supplied 3.7litres of rose water in three days during winter in Madras, in India. The sunshine and solar radiation particulars of Botswana are shown to indicate that a better climatic conditions prevail here for a higher production rate. URI: http://hdl.handle.net/10311/640 Files in this item: 1
Ganesan_BJT_1998.pdf (345.3Kb) -
Mbewe, D.D. (University of Botswana, NaN, 1998)[more][less]
Abstract: This paper describes the fundamental principles of production and accomplishment of High Definition Television (HDTV)-the television system of the future.It looks at the parameters of high definition television (HDTV),and shows how the values of these parameters can be derived from consideration of the performance of the viewer's visual system. Bandwidth requirements for various TV and HDTV systems are compared, and a number of optical fibre transmission techniques are considered for HDTV. In conclusion it is stated that the large bandwidths demands of uncompressed HDTV can be met by emerging technology in optical fibre transmission systems-in particular, wavelength division multiplexing (WDM). The paper is as a result of a project study conducted by the author and a colleage when he studied for his degree at Essex University,England. It makes no reference to the development and relevance of HDTV in the African context. URI: http://hdl.handle.net/10311/627 Files in this item: 1
Mbewe_bjt_1998.pdf (1.386Mb) -
Shuma-Iwisi, M.V. (University of Botswana, NaN, 1998)[more][less]
Abstract: One of the application areas of digital multiplexers is in implementation of logic equations. Truth tables can be used as a design tool, but they become very limited when design details are explored.It will be shown in this paper that the Karnaugh map (K-map) is an essential tool in the systematic detailed design of combinational circuits using multiplexers. The K-map will be used in two ways.First as a visual tool and secondly as a tool for decision making criteria. URI: http://hdl.handle.net/10311/619 Files in this item: 1
Suma-Iwisi_BJT_1998.pdf (1.304Mb) -
Daka, J.S.J. (University of Botswana, NaN, 1998)[more][less]
Abstract: There are many instances where a telephone call charge needs to be avaialable immediately after a call is made. Usually, for a fee a telecommunication provider can provide call charge for a particular call. Call charging systems provide this information automatically without recourse to a telecommunications service provider. The application of call charging systems include private automatic branch exchange line cards, home telephone bill monitoring, monitoring telephones in a telephone cafe booth or payphones. This paper examines the design of hardware and software of the sub-systems for a subscriber based call charging system. URI: http://hdl.handle.net/10311/616 Files in this item: 1
Daka_BJT_1998.pdf (1.141Mb) -
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) -
Raju, V.C.C. (University of Botswana, NaN, 1998)[more][less]
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Gobotswang, K. (United Nations University Press. http://www.unu.edu, NaN, 1998)[more][less]
Abstract: Variations in interdistrict nutritional status have puzzled both social policy makers and health workers in Botswana. A total of 643 households and 898 pre-school children were surveyed to determine factors that are associated with the nutritional status of children below the age of five years in the north-western District of Chobe. Except for those in remote and difficult-to-reach places, all households with a pre-school child were selected for the study. The results showed that the nutritioneal status of the preschool children had a strong positive correlation with access to a latrine (r = 0.52) and ownership of cattle (r = 0.27). Age was negatively correlated with the child’s nutritional status (r = -0.02). URI: http://hdl.handle.net/10311/546 Files in this item: 1
Gobotswang_FNB_1998.pdf (329.4Kb) -
Mahgoub, S.E.O. (AFAHPER-SD; see http://www.ajol.info/journal_index.php?jid=153, NaN, 1998)[more][less]
Abstract: Nutrition and health are closely related to each other. Adequate nutrition leads to good or normal health. The focus of this paper is on the interaction of, and relationships between, nutrition and infection (as a health aspect). URI: http://hdl.handle.net/10311/220 Files in this item: 2
license.txt (1.998Kb)Mahgoub_AJPHERD_1998.pdf (1.414Mb) -
Ketshajwang, K.K.; Holmback, J.; Yeboah, S.O. (AOCS Press. http://www.springerlink.com/content/120382/, NaN, 1998)[more][less]
Abstract: Seed oils were extracted with n-hexane from three edible Leguminosae seeds: Tylosema esculentum, Xanthocercis zambesiaca, and Bauhinia petersiana, giving yields of 48.2, 17.6, and 20.8% (w/w), respectively. Some physical and chemical parameters were determined to ascertain the general characteristics of the oils. The saponification and iodine values indicated that all three oil samples could be classified among the olive group of oils. This inference was supported by the results of the detailed fatty acid composition of the oils as determined by capillary gas chromatography. The ratio of total unsaturated to total saturated fatty acids in all three oil samples was approximately 70:30, with either oleic or linoleic acid being the dominant fatty acid. These results were in agreement with a proton nuclear magnetic resonance analysis of the fatty acid classes in the seed oils. Thus, the analysis served to justify the use of the three Leguminosae seed oils in food preparations. The work has further indicated that, with their attractive properties, the seed oils from T. esculentum, X. zambesiaca, and B. petersiana are good candidates for further studies to evaluate their future commercial prospects in the Southern African region. URI: http://hdl.handle.net/10311/304 Files in this item: 1
quality and compositional.pdf (1.683Mb) -
Motshegwe, S.M.; Holmback, J.; Yeboah, S.O. (AOCS Press. http://www.springerlink.com/content/0003-021X, NaN, 1998)[more][less]
Abstract: A preliminary investigation of the bulk properties of the oil from the edible mophane caterpillar (phane), Imbrasia belina, showed a significant difference in the iodine values of the oils from mature and young phane. Detailed analysis of the fatty acid composition of the two oil samples was thus carried out by capillary gas chromatography (GC) and complemented with 1H and 13C nuclear magnetic resonance (NMR) studies to investigate the degree of unstauration in the two oil samples. While these studies showed that the oil samples from the mature and young mophane caterpillar were much the same in fatty acid composition, the data revealed a significant divergence from a literature report on phane oil. This earlier report puts the ratio of total saturated to total unsaturated fatty acids at approximately 1:1 (48.2:48.8, in percentages) and estimates the fatty acid composition for the major fatty acids as 16:0 (31.9%), 18:0 (15.2%), 18:1 (20.4%), 18:2 (9.9%), and 18:3 (19%). The data collected from the present work, however, showed the fatty acid composition for total saturated and total unsaturated fatty acids to be 40.5 and 57.0%, respectively. This work estimated the fatty acid composition for the major fatty acids as 16:0 (27.2%), 18:0 (12.3%), 18:1 (16.1%), 18.2 (10.7%), and 18:3 (29.0%). Thus, linolenic acid was the most abundant fatty acid in the phane oil. The GC results of the present analysis were largely corroborated by studies of the composition of fatty acid classes in the phane oil estimated from integrals of 1H and 13C NMR signals. Oils from other edible Lepidoptera larvae are also known to be much richer in unsaturated than saturated fatty acids. URI: http://hdl.handle.net/10311/307 Files in this item: 1
General properties.pdf (1.906Mb) -
Tabulawa, R. (Routledge http://www.informaworld.com, April NaN, 1998)[more][less]
Abstract: Attempts to improve the quality of education in Botswana have, inter alia, included an emphasis on a learner-centered pedagogy. Attempts at implementing this pedagogy have been made within the ambit of the technical rational model of curriculum development. The attempts, however, have produced inconclusive results, and these results have often been rationalized in technicist terms, e.g. as being due to lack of resources and poorly trained teachers. Overlooked in this technicist model are the teachers' perspectives on the innovation. Using the case-study approach within the rubrics of the qualitative research paradigm, this study sought to establish the perspectives of geography teachers in a senior secondary school in Botswana vis-a-vis the learnercentered pedagogy advocated in Education for Kagisano (Social Harmony), a report produced by the 1977 Commission on Education. The findings indicated that teachers' classroom practices were influenced by many factors other than technical ones: these included the teachers' assumptions about the nature of knowledge and the ways it ought to be transmitted, their perceptions of students, and the goal of schooling. It also emerged that their assumptions were incongruent with the basic tenets of the learner-centered pedagogy. The findings, then, are an indictment of the technical rational model of change implementation applied in Botswana. They indicate that disregarding what teachers know and think about their taken-for-granted classroom practices when effecting change can lead to disappointing results. URI: http://hdl.handle.net/10311/698 Files in this item: 1
Tabulawa_IJQSE_1998.pdf (1.076Mb) -
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) -
Ketlogetswe, C. (University of Botswana, Faculty of Engineering and Technology, http://ajol.info/index.php/bjt, April NaN, 1998)[more][less]
Abstract: Since independence, the economy of Botswana has been undergoing a rapid transition from one in which the majority of the people depend on traditional agriculture and pastoralism to one in which formal sector employment predominates. This is partly reflected by rapid increase in vehicle population. Because of these changes, the country started to experience environmental problems. Unfortunately from the time of independence until late eighties, the level of environmental awareness in the country was very low, and therefore waste minimisation and reduction of environmental impact procedures were never in place. To date, many organisations in the country still seem not to be committed to reducing and disposing their wastes in environmentally friendly manner. The need to reconcile development with environmental concern, thus sustainable development, is vital. For the country to achieve that, an introduction of environmental impact assessment in Botswana is essential, and thus, the main thrust of the current investigation is to determine the level of concern about environmental problems posed by waste engine oil in various organisations in the country. Management of various organisations were interviewed on their methods of waste engine oil disposal. It was found that the disposal of waste engine oil by many organizations is resulting in serious environmental problems. URI: http://hdl.handle.net/10311/659 Files in this item: 1
Ketlogetswe_BJT_1998.pdf (3.285Mb) -
Youngman, F.; Maruatona, T. (Taylor & Francis, http://www.informaworld.com, July NaN, 1998)[more][less]
Abstract: This article addresses the question of whether extension workers can change their attitudes and practices in order to promote participatory rural development by considering the case of Botswana. It discusses the emergent participatory extension paradigm which uses techniques such as participatory rural appraisal (PRA). It describes the new community-based strategy for rural development in Botswana which includes the expectation that the extension services can be reorientated to facilitate increased community participation. Evidence is presented from research in 1995-96 which evaluated a pilot project involving PRAs undertaken by extension workers in four districts. The project sought to find out systematically whether PRA could enhance the ability of the extension services to undertake participatory rural development. The findings suggest that extension workers can develop through training the attitudinal predisposition necessary for adopting a more participatory approach to extension practice. However, there are institutional and contextual constraints which present obstacles to implementing participatory rural development. It is therefore not certain that the proposal to expand the use of PRA on a national scale will lead to the anticipated reorientation of the extension services. URI: http://hdl.handle.net/10311/1043 Files in this item: 1
Youngman_IJLE_1998.pdf (1.239Mb)