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Ogunlusi, G.O.; Ige, J.; Oyetunji, O.A.; Ojo, J.F. (Springer Science+Business Media B.V., http://www.springer.com/chemistry/journal/11243, NaN, 2009)[more][less]
Abstract: The kinetics of the reactions between azidopentacyanocobaltate(III), Co(CN)5N3 3-, and iron(II) polypyridyl complexes, Fe(LL)3 2? (LL = bipy, phen), have been studied in both neutral and acidic aqueous solutions at I = 0.1 mol dm-3 NaCl. The reactions were carried out under pseudo-first-order conditions in which the concentration of Fe(LL)32+ was kept constant, and the second-order rate constants obtained for the reactions at 35 C were within the range of 0.156–0.219 dm3 mol-1 s-1 for LL = bipy and 0.090–0.118 dm3 mol-1 s-1 for LL = phen. Activation parameters were measured for these systems. The dependence of reaction rates on acid was studied in the range [H+] = 0.001–0.008 mol dm-3. The reaction in acid medium shows interesting kinetics. Two reactive species were identified in acid medium, namely, the protonated cobalt complex and the azido-bridged binuclear complex. The electron-transfer process is proposed to go by mixed outerand inner-sphere mechanisms in acid medium, in which electron transfer through the bridged inner-sphere complex (k5) is slower than through the outer-sphere path (k4). Description: Symbols may not appear as they are in the original abstracts. URI: http://hdl.handle.net/10311/1035 Files in this item: 1
Ogunlusi_TMC_2009.pdf (948.9Kb) -
Tabulawa, R. (Routledge. http://www.informaworld.com, February NaN, 2003)[more][less]
Abstract: Recent pronouncements by international aid agencies on their interest in and preference for a learner-centred pedagogy so far appear not to have attracted much scholarly attention. This paper attempts to explain this interest. It argues that although the efficacy of the pedagogy is often couched in cognitive/educational terms, in essence, its efficacy lies in its political and ideological nature. The fact that the aid agencies’ interest in the pedagogy became explicit soon after the fall of the Berlin Wall is in itself significant. The paper argues that aid agencies’ apparent lack of interest in pedagogical issues before 1989 lay partially in the very central hypothesis of the modernisation theory of development which became enshrined in policies of aid agencies soon after the latter were created. The hypothesis, coupled with human capital theory, viewed education in technicist terms. However, the ascendancy of neo-liberalism as a development paradigm in the 1980s and 1990s elevated political democratisation as a prerequisite for economic development. Education, then, assumed a central role in the democratisation project. Given its democratic tendencies, learner-centred pedagogy was a natural choice for the development of democratic social relations in the schools of aid-receiving countries. Aid agencies, therefore, had to be explicit about their preference for the pedagogy. Thus, the pedagogy is an ideological outlook, a worldview intended to develop a preferred kind of society and people. It is in this sense that it should be seen as representing a process of Westernisation disguised as quality and effective teaching. URI: http://hdl.handle.net/10311/518 Files in this item: 1
Tabulawa_CE_2003.pdf (1.336Mb) -
Chebanne, A. (University of Botswana, Office of Research and Development, http://www.ub.bw, NaN, 1996)[more][less]
Abstract: Our motivation and inspiration to undertake this aspect of the phonology of Setswana is derived from research in Setswana phonology by Creissels (Notes, 1991-1992) and from the Bantu languages phonology by Bastin (1983). The reanalysis of the phenomenon that we earlier treated under what the two linguists describe generally as "imbrication"l (cf. Chebanne, 1993, ACAL 24), and which means an affixal imbedding which transforms morphemes has yielded new mterpretations on the Setswana data. We are now inclined to call this phenomenon "intersuffixing", which refers here to the adjustment of positions and forms undergone by verbal suffixes according to morpho-phonological rules. The two terms, intersuffixing and imbrication, actually do not mutually exclude each other. Imbrication may result after certain suffixal permutations in the process of intersuffixing have occurred. URI: http://hdl.handle.net/10311/863 Files in this item: 1
Chebanne_PBJAS_1996.pdf (415.4Kb) -
Uziak, J.; Oladiran, M. T. (Tempus Publications http://www.ijee.ie/, NaN, 2009)[more][less]
Abstract: Complementary studies are fundamental for accreditation of engineering programmes in line with the Washington Accord. This paper presents the experiences of the University of Botswana in introducing General Education Courses (GECs) for the purpose of broadening the educational experience of all students, with particular reference to engineering students. Students registration data captured in the Integrated Tertiary Software (ITS) were analysed using Excel software. The five-year study period was from 2002 to 2007. Results indicate that engineering students mainly took GECs offered by the science and technology disciplines. It is concluded that GECs should be retained within the engineering programmes but the student advisory system should be improved and skills (e.g. IT competencies) that are important for professional development should be embedded in core courses instead of in general education. URI: http://hdl.handle.net/10311/700 Files in this item: 1
Uziak_IJEE2_2009.pdf (886.3Kb) -
Mpoloka, S.W. (American-Eurasian Network for Scientific Information. http://www.aensi.org/aeb_online.html, NaN, 2008)[more][less]
Abstract: The nuclear 18S rDNA and chloroplast encoded rbcL gene sequences were used to investigate the evidence of residual UV-B induced mutagenesis in Dimorphotheca sinuata plants. The probes were generated by the polymerase chain reaction and labelled with a non-radioactive Digoxigenin label and used in Southern hybridization studies. High levels of variability in the 18S rDNA gene were found, pointing to genome rearrangements and possibly genome instability due to UV-B effects. URI: http://hdl.handle.net/10311/484 Files in this item: 1
Investigating evidence.pdf (1.233Mb) -
Loukanov, I. A. (Research in Agricultural Engineering http://journals.uzpi.cz/web/RAE.htm, NaN, 2007)[more][less]
Abstract: This paper deals with the pumping process of a resonance-vibrating pump, which utilizes the resonance vibrations of one degree-of-freedom oscillating system. The pump is powered by a mechanical shaker consisting of two counter rotating offset masses and operating in resonance. The study investigates the nature of the pumping process and conditions required to achieve pumping action. Equations for the flow rate, pressure developed at ground level or any height above it, the pump efficiency, and the power delivered by the shaker are derived. The analysis of the pumping process revealed that the flow rate of the pump may be maximized either by increasing the acceleration imparted on the oscillating system, and/or by reducing the resonance frequency. It was found that the pressure developed by the pump is independent of the depth of pumping, provided that the same acceleration is imparted, and its efficiency may be increased either by reducing the resonance frequency and/or by increasing the depth of pumping. The preliminary test results about the flow rate and pressure developed at ground level appeared to be close to the values predicted by the proposed theory. Based on the analysis of the theoretical and experimental findings it is concluded that the equations derived in this study may be employed in designing resonance vibrating pumps for a desirable flow rate, pressure, and efficiency in pumping water from a specified depth. URI: http://hdl.handle.net/10311/693 Files in this item: 1
Loukanov_RAE_2007.pdf (792.9Kb) -
Moswela, B. (North West University; http://www.puk.ac.za/opencms/export/PUK/html/fakulteite/opvoed/educ/Reviewed_artikels.html, November 29, 2007)[more][less]
Abstract: This paper reports the findings of a research study conducted among 64 undergraduate inservice teachers at primary schools in Botswana. It uses the qualitative research method to examine and discuss the different leadership approaches used by principals of primary schools. The study concludes that the majority of the principals adequately involve teachers in the decision-making processes of schools. The analysis of the data shows that by and large, qualification is not a significant issue that affects the management style practiced by primary school principals. Rather, the democratic practices that prevail in schools are mainly the result of the existing school improvement initiatives introduced in schools in the 1990s. URI: http://hdl.handle.net/10311/210 Files in this item: 2
license.txt (1.998Kb)Moswela_eDUC_2007.pdf (208.1Kb) -
Ssegawa, J.K.; Samman, J.; Kgatlegang, J. (University of Botswana, NaN, 2001)[more][less]
Abstract: Without cost information, project planning is difficult for clients just as pricing of tenders is difficult for construction firms. No agency or organization in Botswana has endeavoured to collect, compile and analyze construction data with a view to establish a cost/price database and a subsequent building index. This paper reports an investigation into the possibility of establishing a building index and a related cost database of building items. It is based on previous studies in Botswana, which indicated that no such information exists anywhere in the public domain and many firms have a tough time during the planning of projects and pricing of project tenders. By producing a price database of common building and a building index the study shows the possibility of establishing a fully-fledged data bank for both items. Recommendations are made on how to improve the current situation and the results of the study. URI: http://hdl.handle.net/10311/623 Files in this item: 1
Ssegawa_BJT_2001.pdf (2.314Mb) -
Adeyemi, M.B. (Taylor & Francis, http://www.tandf.co.uk/journals, July NaN, 2010)[more][less]
Abstract: This paper identifies the aims and contents directly linked to the teaching and learning of the concept of democracy at the junior secondary school level in Botswana. It examines the perceived extent to which the objectives of teaching the concept of democracy has been achieved by 72 social studies teachers, in addition to finding out the perceived challenges they face and their suggested solutions while teaching topics related to democracy. It was found that the majority of the social studies teachers believe that the level of the achievement of the teaching of the aims is either average or above average. The problems of defining the concept of democracy and the handling of mixed ability students were identiified as major challenges to the teaching of the concept of democracy in social studies. The study found a moderate but positive correlation between the self-assessment of 36 purposively selected subjects from the 72 social studies teachers and the observed attributes on some traits on democracy while teaching a topic on democracy. A correlated t-test further indicates a significant difference between the ratings of the teachers and those of the investigator. It was concluded that a gap exists between theory (what teachers perceive as practicing) and practice (what they actually do in the classrooms). URI: http://hdl.handle.net/10311/1044 Files in this item: 1
Adeyemi_ES_2002.pdf (1.951Mb) -
Alemaw, B.F.; Chaoka, T.R.; Totolo, O. (Elsevier Ltd. http://www.elsevier.com/wps/find/journaldescription.cws_home/413/description#description, NaN, 2006)[more][less]
Abstract: The agricultural economic sector of Botswana is limited mainly to range resources-based livestock and pockets of arable farming based on rainfall and limited irrigated agriculture at several places. In this study agricultural sustainability of rain-fed agriculture is investigated in Botswana by considering the Pandamatenga plains as a case study. Daily soil moisture regimes with respect to crop growth cycle were modelled using a water balance model based on 42 years of daily hydroclimatic inputs and corresponding simulated components of soil moisture, evaporation, surface runoff, and deep percolation. Using a sustainability criterion on crop water requirement and soil moisture availability during the cropping periods, it was found that rain-fed agriculture of maize, sunflower, and sorghum crops is sustainable. The relative sensitivity to drought of these crops was also found to conform to the Agromisa recommendations. In the pursuit to explore more IWRM opportunities, through the simulation of the corresponding direct runoff, we have also explored that more water harvesting opportunities exist in order to manage rainfall excesses effectively. URI: http://hdl.handle.net/10311/155 Files in this item: 4
alemaw_chaoka_totolo_06.pdf (2.112Mb)license.txt (1.998Kb)license.txt (1.998Kb)license.txt (1.998Kb) -
Monyatsi, P.P. (Academic Journals, http://www.academicjournals.org, August NaN, 2006)[more][less]
Abstract: The development of staff in any organization in order to attain quality results is a sine qua non. The human resource of any organization, including schools and colleges is central to its effectiveness. What matters is the model that is used to enable the development of staff, in this case the development of teachers in secondary schools. This article argues that the school-based workshops as a component of staff development in the schools is the most effective due to several reasons, among them, the contextuality of the approach, it needs-driven nature, and the collaboration and teamwork that are its hallmark. Apart from the above, the study highlights some advantages that accrue such as being costeffective and time saving and not being disruptive to the teaching and learning processes. The study combines both the qualitative and quantitative approaches to research. URI: http://hdl.handle.net/10311/987 Files in this item: 1
Monyatsi_ERR_2006.pdf (916.2Kb) -
Moseki, B.; Buru, J.C. (Academic Journals, http://www.academicjournals.org/, NaN, 2010)[more][less]
Abstract: The aim of this study was to assess the growth response of Sesuvium portulacastrum (L.) (a halophyte) to various NaCl concentrations and hence determine how it is adapted to grow optimally under saline conditions. S. portulacastrum was grown hydroponically in various NaCl concentrations (that is, 0, 100, 200, 400 and 600 mol m-3 NaCl). It was found to exhibit a growth pattern typical of dicotyledonous halophytes. It attained maximal growth at 200 mol m-3 NaCl concentration in hydroponic cultures. It accumulated large concentrations of Na+ and Cl- with the leaves having the highest ion content. These ions are believed to be sequestered in the vacuole. S. portulacastrum also accumulated proline in high concentrations and this proline appeared to adjust the cytoplasmic ion concentration to balance that of the vacuole. URI: http://hdl.handle.net/10311/961 Files in this item: 1
Moseki_SRE_2010.pdf (102.5Kb) -
Wolski, P.; Murry-Hudson, M.; Fernkvist, P.; Liden, A.; Huntsman-Mapila, P.; Ramberg, L. (Botswana Society, NaN, 2005)[more][less]
Abstract: Groundwater under islands in the Okavango Delta is a known sink of inorganic dissolved minerals, preventing salinisation of this virtually enclosed evaporation-dominated hydrological system. The Okavango Delta is an oligotrophic, yet very productive system, and it is important to understand sources, pathways and recycling of nutrients in order to fully comprehend its ecology. In order to investigate the role of islands as nutrient sinks, concentrations of nitrogen and phosphorus, as well as major inorganic ions were measured in island and floodplain groundwater. The electrical conductivity was found to be up to 50 times higher in the island centre groundwater than in the surrounding floodplain groundwater. The amount of total phosphorus was found to be up to 400 times higher and total nitrogen up to five times higher in the interior of the island than in the surrounding floodplain. These show that major nutrients are, like other inorganic ions, accumulated under islands. Importantly, the ratio of nitrogen to phosphorus was 5:1 in floodplain water and water in island fringe soils, but 1:4 in island centres. his indicates an intensive removal of nitrogen along the floodplain-island groundwater flow path by the floodplain fringe and riparian biota, resulting in a relative enrichment in P. URI: http://hdl.handle.net/10311/950 Files in this item: 1
Wolski 2005 Islands.pdf (1.469Mb) -
Ngamga, D.; Yankep, E.; Tane, P.; Bezabih, M.; Ngadjui, B.T.; Fomum, Z.T.; Abegaz, B.M. (Verlag der Zeitschrift fu¨r Naturforschung, Tu¨bingen · http://znaturforsch.com, NaN, 2005)[more][less]
Abstract: Three new isoflavonoids, griffonianone F, G and H were isolated from the seeds of Millettia griffoniana, along with the known prebarbigerone, pseudobaptigenin, pseudobaptigenin methyl ether, tephrosin, dipterixine, odorantine, 7,4’,5’-tetramethoxyisoflavone and isojamaicin. Their structures were assigned on the basis of spectroscopic data and chemical transformations. URI: http://hdl.handle.net/10311/274 Files in this item: 1
Isoflavonoids from Seeds.pdf (1.353Mb) -
Baloi, B.; Matsheka, M.I.; Gashe, B.A. (Global Science Books, http://www.globalsciencebooks.info/, NaN, 2011)[more][less]
Abstract: Halophilic bacteria from the Makgadikgadi salt pans in north central Botswana were isolated using culture-dependent methods. Polymerase chain reaction (PCR) amplification of the 16S rRNA gene and phylogenetic analysis were used to identify the strains. Culturing was done aerobically in six different complex salt media. Salt concentrations used were 1Halophilic bacteria from the Makgadikgadi salt pans in north central Botswana were isolated using culture-dependent methods. Polymerase chain reaction (PCR) amplification of the 16S rRNA gene and phylogenetic analysis were used to identify the strains. Culturing was done aerobically in six different complex salt media. Salt concentrations used were 15, 20, 25 and 30% (2.6, 3.4, 4.3 and 5.1 M, respectively) NaC1, at pH 7.2 to pH 8.0. Four colony morphology types were isolated in axenic cultures comprising Gram-positive cells. Universal bacterila primers were used to amplify 16S rDNA from chromosomal DNA isolated from three of the four distinct colony groups. Restriction enzyme digest analysis of the 16S rDNA revealed seven RFLP types. Five of the RFLP types were subjected to sequencing. Comparison of the 16S rDNA sequence alignment to reference sequence data bases showed samples S2012A3, S2012B2 and S2012B3 to have between 95 and 99% homology to Bacillus sp. BH 164 and Bacillus sp. HS 136T, a novel species recently described as Bacillus persepolensis. Isolate S4102D4 showed 95 to 99% homology to Thalassobacillus sp. JY0201 and Thalassobacillus sp. FIB228 and Halobacillus sp. MO56 species. All five isolates had at least 95% similarity to published sequences implying they could be species within the described genera. A sub-tree drawn to compare the isolates indicated two phyletic lines with S4102D4 being an outlying strain and S2012A3, S2012B and S2012B3 being a closely related clonal group all of which branch from Bacillus sp. BH 164. Pending conclusive culture, biochemical and polar lipid composition data these microorganisms are regarded as previously un-described and therefore novel species of halophilic bacteria. URI: http://hdl.handle.net/10311/920 Files in this item: 1
Matsheka_AJPSB_2011.pdf (525.8Kb) -
Rathedi, M. (Pula: Botswana Journal of African Studies, www.thuto.org/pula/html/, NaN, 2003)[more][less]
Abstract: Poverty is a complex problem and reducing it depends upon many interconnected factors. It cannot be attributed to one main cause. Its reduction is possible only by achieving economic growth. An indirect causal connection between growth and poverty reduction can be seen because governments will have greater scope for action through suitable policy measures that can take care of the interests of the poor. In spite of the efforts of most of the developing countries, where the levels of poverty are high, to reduce the magnitude of poverty, the percentage of people living below the poverty level has not been reduced significantly. Of course, international financial institutions have been extending the necessary assistance by setting the goals. But poverty reduction lies in the nature of the growth process itself, as determined by the set of economic policies that are being pursued by governments to justify actions targeted towards the poor. URI: http://hdl.handle.net/10311/883 Files in this item: 1
Rathedi_PBJAS_2003.pdf (574.5Kb) -
Mutula, S. (Emerald Publishing Group Ltd; www.emeraldinsight.com/nlw.htm, July NaN, 2004)[more][less]
Abstract: This paper is a spin off of a keynote address that was delivered by the author at the IFLA-Africa section workshop on 'developing and managing digital libraries'that was held in Gaborone Botswana from 23-27 February 2004. The author points out that libraries in Sub-Saharan Africa like their counterparts in the rest of the world are continuing to experience a period of rapid change as they prepare to participate in the global information society. In this endeavour, the libraries face various challenges of economic, technological, content, and information literacy nature. In a global information society, there is need to democratize access to information using ICTs, provide adequate and relevant local content to users and equip them with requisite information literacy skills to efficiently find their way in a maze of information networks. This paper discusses the patterns of ICTs diffusion within libraries in Sub-Saharan Africa and the implications for the development and management of digital libraries. URI: http://hdl.handle.net/10311/167 Files in this item: 2
license.txt (1.998Kb)mutula1.pdf (111.9Kb) -
Mgaya, K.V.; Kitindi, E.G. (Inderscience Publishers, http://www.inderscience.com, NaN, 2008)[more][less]
Abstract: Information Technology (IT) skills are important for practising accountants and accounting educators. This paper reports on a study done to evaluate the levels of IT skills of practising and accounting educators in Botswana, as well as their views on the important IT skills for practising accountants. A questionnaire was administered to 27 accounting lecturers and 250 practising accountants. Respondents were asked to indicate their IT skills levels as well as their views on the important IT skills that practising accountants should have. The results show that the self-reported IT skills of practising and accounting educators are lower than what they think practising accountants should have. URI: http://hdl.handle.net/10311/584 Files in this item: 1
E.G.Kitindi.at.el-ISAPAB.pdf (1.742Mb) -
Togarasei, L. (Research and Development Unit, University of Botswana, NaN, 2008)[more][less]
Abstract: Most of the literature on religion and politics in Africa celebrates the role that churches have played in fighting the oppressive yoke of colonialism, in fighting the ills of ethnicity and tribalism and in the process of democratisation in post-colonial Africa. There are, however, few academic works that investigate how churches are affected by secular politics. This article contributes to such an investigation. It does so through a critical examination of the reasons that led to the division of the Family of God Church in Botswana. Its argument is that the reasons that led to the division of this church are not only intra-church but also inter-state politics. From a study of the experiences of this church, the article concludes that although the church may have been experiencing internal problems, its division into two groups was also influenced by inter-state politics between Botswana and Zimbabwe. URI: http://hdl.handle.net/10311/642 Files in this item: 1
Togarasei_PULA_2008.pdf (105.4Kb) -
Fako, T.T.; Forcheh, N. (Taylor & Francis, www.taylorandfrancis.com, NaN, 2000)[more][less]
Abstract: In this paper the authors examines the extent of job satisfaction and dissatisfaction in a national sample of 325 nurses working in hospitals, clinics and health posts in Botswana. The analyses explored the effects of background variables, work context variables, resources variables, recognition and support variables, and union membership on job satisfaction. The findings show that nurses were generally not satisfied with their jobs. Twelve of the 31 variables examined were found to be associated with job satisfaction. Age, basic level of education, level of nursing training, level of income, extent of satisfaction with income, type of health facility, adequacy of telecommunication facilities and overall health since posting were found to have strong and positive associations with job satisfaction. Adequacy of equipment, recognition from supervisors, and overall health before posting had moderate and positive effects on job satisfaction. Satisfaction with current workstation had a positive but weak relationship with job satisfaction. No relationship was found between job satisfaction and other work environment variables such as adequacy of transport, opportunity for in-service training and relationships with peers. Similarly, workload was not found to be an important determinant of job satisfaction among nurses, nor were community involvement and membership of nursing organisations. URI: http://hdl.handle.net/10311/1132 Files in this item: 1
Fako_ST_2000.pdf (1.521Mb)