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Now showing items 1394-1413 of 2172
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Optical Characterization of TiO2-bound (CuFeMnO4) Absorber Paint for Solar Thermal Applications
(Science and Education Publishing, http://www.sciepub.com/journal/AJER, 2016)A composite thin film consisting of TiO2 (binder), uniformly mixed CuFeMnO4 paint (solar absorber) was coated on textured aluminum sheets by dip coating. The film’s elemental analysis was done using energy dispersive x-ray ... -
Optical Features, Microstructure and Microanalysis of Botswana Agates
(University of Botswana; www.ub.bw, 2015-07-09)In Botswana agates are found in the north-eastern region of the Central District in the basalt from the 180 Ma Karoo volcanic rocks. Predominantly they are wall-lining agates but some vein agates can also be found. There ... -
Optical properties of amorphous Sb2Se3:Sn films
(Taylor & Francis, 2010)The measurements and analysis of optical transmission and far-infrared (IR) reflectivity spectra of thermally evaporated Sb2Se3:Sn films are reported. The refractive index and film thickness have been determined from ... -
Optical properties of GaAs nanowires with an electric potential that varies inversely with the square of the radial distance
(Hindawi, https://www.hindawi.com/, 2019-07-10)A theoretical investigation of optical properties of a cylindrical quantum wire (CQW) is presented. The properties studied were optical absorption coefficient (AC) and change in refractive index (CRI) of the quantum wire. ... -
Optical transition rates in a cylindrical quantum wire with an inverse parabolic potential
(Opast Group LLC, https://www.opastpublishers.com/journal/advances-in-theoretical-computational-physics, 2019-05-25)Electron transition rates due to interaction with circularly polarized light incident along the axis of a free-standing solid cylindrical nanowire are evaluated in the dipole approximation. In this case, the allowed optical ... -
Optimal investment under inflation protection and optimal portfolio With stochastic wage income
(University of Botswana, www.ub.bw, 2017-05)This dissertation considers the optimal portfolio strategies for an investor that obtains stochastic income and gives out stochastic cash outflows under inflation protection. The Investor trades on a complete diffusion ... -
Optimising growth conditions for the pectinolytic activity of Kluyveromyces wickerhamii by using response surface methodology
(Elsevier / www.elsevier.com/locate/ijfoodmicro, 2003)This present study was undertaken to find optimum conditions of pH, temperature and, period of incubation for the pectinolytic activity of Kluyveromyces wickerhamii isolated from rotting fruits and to assess the effect ... -
Organisational conflict and its effects on organisational performance
(Academic Journals, www.academicjournals.org, 2009)The aim of this study was to find out the causes, types, effects and strategies on how to manage conflicts in organisations effectively to enhance organisational performance. Therefore, it is prime responsibility of ... -
The Origin and Early Years of the History Undergraduate Major Research Essay at the University College of Botswana (Later University of Botswana)
(University of Botswana, www.ub.ac.bw, 2017-01-18)When I joined the Department of History in February 1976, one of my first experiences was to attend a seminar led by Professor Thomas Tlou discussing the last-but-final drafts of fourth-year student essays on various topics ... -
The origin and evolution of Setswana culture: a linguistic account
(University of Botswana, www.ub.ac.bw, 2017-01-18)Language is one of the important means by which all cultural experiences, both conceptual and material, are accumulated, stored and transmitted either vertically from generation to generation or horizontally from one ... -
Origin and palaeo-environments of calcareous sediments' in the Moshaweng dry valley, Southeast Botswana
(John Wiley & Sons, Ltd. http://www3.interscience.wiley.com/journal/117935722/grouphome/home.html, 2002)Quaternary sedimentation in the Moshaweng dry valley of southeastern Botswana is evaluated on the basis of geomorphological evolution and sedimentological analyses. Stratigraphic evidence reveals an 'upper surface (1095 ... -
Origins and dynamics of the Botswana-Soviet Union relations, 1960s to 1990
(University of Botswana, www.ub.ac.bw, 2017-01-18)This paper primarily uses archival and oral sources to examine the origins and dynamics of relations between Botswana and the Union of Soviet and Socialist Republic (USSR) within the context of the Cold War. The USSR or ... -
Origins of strandline duricrusts around the Makgadikgadi Pans (Botswana Kalahari) as deduced from their chemical and isotope composition
(Elsevier www.elsevier.com/locate/sedgeo, 2009)Trace elements togetherwith some O and C isotope analysiswere undertaken on duricrust strandline deposits in the palaeo-Makgadikgadi sub-basin (PMSB) to provide insight into palaeo-climatic conditions through the interpretation ... -
Orphaned adolescents and caregivers perceptions of their attachment relationship and coping strategies employed by the young: a case study of Metsimotlhabe
(University of Botswana, www.ub.bw, 2019-06)An exploratory qualitative study was conducted among 10 orphaned adolescents, 10 caregivers and 5 key informants from Metsimotlhabe. The aim of the study was to explore perceptions of orphaned adolescents and caregivers ... -
‘Our past, our present, and, most importantly of all, our future’: the role of Potters in Botswana
(University of Botswana, www.ub.ac.bw, 2017-01-18)This study integrates various multi-disciplinary approaches on ceramics that provide coherent answers to the past, present and possibly the future of the subject. Special focus is on the four main stages of pottery production ... -
Out-of-school experiences in science classes: problems, issues and challenges in Botswana
(Taylor & Francis, http://www.tandf.co.uk/journals, 2004-03-19)This paper sets out to identify some key problems, issues and challenges relating to out-of-school experiences of learners in science teaching that emerged during classroom observations in schools in Botswana. Generally, ... -
An overview of occultism in the literary works of Unity Dow and Emmanuel Mbogo
(Journal of the Linguistics Association of Southern African Development Community Universities, journals.ub.bw/index.php/lasu, 2016-07-28)Although modernity as evidenced by formal education, urbanization, globalization and an ICT-driven age has resulted in tremendous social-cultural changes in Africa, the practice of occultism, often considered as belonging ... -
An overview of the geology and major ore deposits of Central Africa: Explanatory note for the 1:4,000,000 map ‘‘Geology and major ore deposits of Central Africa’’
(Elsevier www.elsevier.com/locate/jafrearsci, 2006)This paper is prepared within the frameworks of IGCP Project 470 and the associated BRGM scientific project ‘‘Africa 1999–2004’’ to accompany the 1:4,000,000 scale map ‘‘Geology and major ore deposits of Central Africa, ... -
Oxide of nitrogen in diesel engines: formation, effects and control
(University of Botswana, 2001)Diesel engines are used in heavy duty applications because of their high effeciency an reliability. However, oxides of nitrogen emissions remain a major concern. In diesel engines, fuel combustion is responsible for a major ... -
Oyster mushrrom cultivation at different production systems: a review
(Dr. Petkova V., http://www.ejbps.com/, 2018-05)This paper aims to review historical perspectives, nutritional and medicinal benefits, biodiversity, cultivation, diseases and their control, pathogen detection systems, food safety concerns and use of spent mushroom compost ...