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Veld condition and animal performance: Application of an optimal foraging model
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N. Owen‐Smith --- Resource Ecology Group, Department of Zoology, Republic of South AfricaAn optimal foraging model was used to predict food ingestion rate, food digestion rate and animal energy gains relative to requirements as functions of dietary composition. Energy gains were maximized by ranking food types in order of their effective value,... -
Using canonical variate analysis to group small white bean cultivars canned in tomato sauce according to their canning quality
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. van der Merwe --- , Republic of South Africa G. Osthoff --- Department of Microbial, Biochemical and Food Technology, South Africa A.J. Pretorius --- , Republic of South AfricaA laboratory-scale canning and evaluation method was employed to evaluate the canning quality of small white beans over cultivars, localities and seasons. Four small white bean cultivars, representing 15 localities from the 2001/02 season and six cultivars representing 17 localities... -
Factors Impacting on Career Choices of Technikon Students From Previously Disadvantaged High Schools
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Olaniyi Bojuwoye --- University of Kwazulu Natal, Sihle Mbanjwa --- University of Kwazulu Natal,Career development is a socially constructed process involving complex interactions among different structures, forces, and systems all constituting spheres of influence. The purpose of this study was to investigate factors that influence career decisions. Eighty respondents (40 males and 40... -
Influences on Career Choice Among Psychology Undergraduate Students: Role of Social Agents
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Pilot Mudhovozi --- University of Venda, South AfricaThe study explored factors that mediate the choice of psychology as a major subject by undergraduate students. Participants were a convenience sample of 368 students from two higher education institutions in Southern Africa (males =186, females =182, mean age =... -
Teachers' Gender Stereotypes in South Africa: A Case Study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Tuntufye S. Mwamwenda --- Africa Institute of South Africa,The study investigated Teachers' gender stereotypes in the Eastern Province of South Africa. Participants were 65 Junior Secondary school teachers (females= 40 and males = 25) who assembled together at a seminar organized by the Department of Education. They completed... -
Striking differences between ZF and ZF+weak choice in view of metric spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Horst Herrlich Kyriakos Keremedis Eleftherios TachtsisWell-known properties held by metric spaces with the countable chain condition (ccc) such as separability, second countability, Lindelöf, paracompactness may fail in the absence of the axiom of choice AC. In the long catalogue of weak choice principles, see [10],... -
On Closure Operators, the Reals, and Choice
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Eraldo Giuli Horst HerrlichThe behaviour and the relationships between various closure operators are investigated for subspaces of the reals in the setting of ZF, i. e., Zermelo-Fraenkel set theory without the axiom of choice. Typical results: Equivalent are: 1. Every subspace... -
Graph-Coloring and Choice a Note on a Note by Shelah and Soifer
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Horst Herrlich Y.T. RhineghostSharpening results of Shelah and Soifer we will show that in ZF set theory the Shelah-Soifer Graph G has the following properties: 1. If AC(2), the axiom of choice for families of 2-element sets, or AC(R), the axiom... -
Binary Partitions in the Absence of Choice or Rearranging Russell's Socks
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Horst HerrlichGiven a sequence (Xn )n∈N of pairwise disjoint 2-element sets. Can ∪ n∈N Xn be rearranged as a union ∪ i∈I Yi of a family (Yi )i∈I of pairwise disjoint 2-element sets, indexed by an uncountable set I? It... -
On Russell and Anti Russell-Cardinals
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Horst Herrlich --- , Germany Kyriakos Keremedis --- Department of Mathematics, Greece Eleftherios Tachtsis --- Department of Statistics and Actuarial-Financial Mathematics, GreeceIn the absence of the Axiom of Choice we study countable families of 2-element sets with no choice functions which either have infinite subfamilies with a choice function or no infinite subfamilies with a choice function. -
UG-Differentiability Entails Hahn-Banach
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Marianne Morillon --- ERMIT, Département de Mathématiques et Informatique, FranceDenoting by ACN the countable axiom of choice, we show in ZF+AC N that the dual ball of a uniformly Gâteaux-differentiable normed space is compact in the weak* topology.In ZF, we prove that this dual ball is (closely) convex-compact in... -
Territory size and habitat selection of Cinnamon-breasted Rock Bunting Emberiza tahapisi in Nigeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: FidelisA Atuo --- AP Leventis Ornithological Research Institute, Nigeria ShiiwuaA Manu --- AP Leventis Ornithological Research Institute, NigeriaMost of our understanding of territorial behaviour in birds comes from studies of temperate species. Territoriality and factors influencing territory size of tropical birds are still poorly studied. In this study, 11 territories of the Cinnamon-breasted Rock Bunting Emberiza tahapisi... -
Temperature preference of juvenile dusky kob Argyrosomus japonicus (Pisces: Sciaenidae)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Bernatzeder PJ BritzThe final temperature preference of cultured juvenile dusky kob is determined to provide an indicator of their optimum temperature for growth. Trials were conducted over a five-day period in horizontal temperature gradients ranging from 21°C to 27°C. Control trials were... -
An Independence Result Concerning Russell-Cardinals
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Eleftherios TachtsisWe show that it is consistent with ZF 0 that there exists a Russell-cardinal α such that the cardinals α 2 and 2α are incomparable. This answers in the negative a related question from Herrlich and Tachtsis “On the number... -
Contraceptives: a guide to product selection
Item type: Journal Article • Journal: South African Family Practice • Authors: PS Steyn --- Family Planning and Reproductive Health, Stellenbosch University, J Kluge --- Department of Obstetrics and Gynaecology, South AfricaContraception remains one of the most cost-effective public health measures to reduce rates of maternal and infant mortality. General practitioners (GPs) who provide contraceptive counselling should be able to discuss every eligible contraceptive method for the specific woman. In addition... -
Rethinking technological choices and knowledge production in the mines and on the factory floor: Chhattisgarh Mukti Morcha's experiences in central India
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Radhika Krishnan --- Centre for Studies in Science Policy, IndiaThis paper seeks to locate in the experiences of the Chhattisgarh Mukti Morcha, a workers’ collective in Central India, an alternative model of technological transfer. Responding to the proposal of large-scale mechanisation of the iron ore mines in Central India,... -
Intraspecific host preferences of mopane moths (Imbrasia belina) in mopane (Colophospermum mopane) woodland
Item type: Journal Article • Journal: African Zoology • Authors: Halszka Hrabar --- Department of Zoology and Entomology, South Africa Dawood Hattas --- Department of Botany, South Africa Johan T. du Toit --- Department of Zoology and Entomology, South AfricaColophospermum mopane trees are a common larval food plant of the mopane moth (Imbrasia belina),which commonly reaches outbreak proportions. Our study investigated factors determining host tree choice by ovipositing mopane moths within a single host species (C. mopane). Tree size... -
Seasonal effects on digging activity and burrow architecture in the Cape dune mole-rat, Bathyergus suillus (Rodentia: Bathyergidae)
Item type: Journal Article • Journal: African Zoology • Authors: H.G. Thomas --- Mammal Research Institute, Department of Zoology and Entomology, South Africa P.W. Bateman --- Mammal Research Institute, Department of Zoology and Entomology, South Africa M. Scantlebury --- Mammal Research Institute, Department of Zoology and Entomology, South Africa N.C. Bennett --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaMost polygynous male mammals exhibit little or no parental care or involvement raising young. Instead, they invest indirectly in their own morphological and physiological attributes which enhance their chance of reproduction. Such secondary morphological sex traits may contribute to differences... -
Uncertainty, cost of capital and financial disclosure: A review of the theory and some evidence
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: M Negash --- University of the Witwatersrand,This paper contains a critical review of the uncertainty research, and reports on the relationship between corporate disclosure and the adverse selection component of the buy-sell (bid-ask) spread of stock prices. Order processing and holding costs will be decoupled from... -
Exploring student perceptions and experiences of ICT-enhanced formative assessment in an undergraduate management accounting course
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: K. J. Barnard --- Department of Accounting, South Africa M. Mostert --- Centre for Higher Education, Research, Teaching and Learning, South AfricaThe central role of assessment in driving student learning has been well argued in the literature. In particular, continuous formative assessment with timely feedback helps motivate students to work consistently, while the addition of just-in-time support may further motivate and... -
Career support needs of learners with historical disadvantage: an exploratory study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Cebile Tebele --- Department of Industrial Psychology, South Africa Kathryn Anne Nel --- Department of Psychology, South Africa Bongani Dlamini --- Department of Applied Managment, South AfricaThis study explored the career support needs of learners from a historically disadvantaged rural South African school setting. Participants were a convenience sample of 20 high school learners (females=60%; males=40%; age range 15–17 years; schools grades 9–10). They completed focus... -
Uncertainty, cost of capital and financial disclosure: A review of the theory and some evidence
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: M Negash --- University of the Witwatersrand,This paper contains a critical review of the uncertainty research, and reports on the relationship between corporate disclosure and the adverse selection component of the buy-sell (bid-ask) spread of stock prices. Order processing and holding costs will be decoupled from... -
Population increase and nest-site selection of Cattle Egrets Bubulcus ibis at a new colony in drylands of north-east Algeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Majda Sbiki --- Department of Natural and Life Sciences, Algeria Haroun Chenchouni --- Department of Natural and Life Sciences, Algeria Abdelkrim Si Bachir --- Department of Natural and Life Sciences, AlgeriaColony occupation by Cattle Egrets Bubulcus ibis at an arid location in north-east Algeria lasted from mid-March or April to August. The colony, which was founded in 2003, increased from 124 pairs in 2007 to 250 pairs in 2011 and... -
Feeding biology of the giant clingfish Chorisochismus dentex – implications for limpet populations
Item type: Journal Article • Journal: African Zoology • Authors: Y.A.R.G. Lechanteur --- Marine Biology Research Institute, South Africa K. Prochazka --- Marine Biology Research Institute, South AfricaThe behaviour of the giant clingfish, Chorisochismus dentex, feeding on limpets was investigated in the laboratory and in the field. Prey size and species preference were determined in captivity, and compared with observations of stomach contents obtained from fishes in... -
Knowledge of nutrition facts on food labels and their impact on food choices on consumers in Koforidua, Ghana: a case study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: S. Darkwa --- Department of Vocational and Technical Education, GhanaObjective: The aim of this study was to investigate consumers’ knowledge of food labels and how this knowledge guides their decisions when making purchasing choices with regard to food. -
Adherence to infant-feeding choices by HIV-infected mothers at a Nigerian tertiary hospital: the pre-“rapid advice” experience
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Cu Onubogu --- Nnamdi Azikiwe University Teaching Hospital, Nigeria Ef Ugochukwu --- Nnamdi Azikiwe University Teaching Hospital, Nigeria I. Egbuonu --- Nnamdi Azikiwe University Teaching Hospital, Nigeria In Onyeka --- Institute of Public Health and Clinical Nutrition, FinlandObjectives: The study examined adherence to infant-feeding choices made by human immunodeficiency virus (HIV)-infected mothers at a Nigerian tertiary hospital prior to implementation of the “rapid advice” guideline, i.e. the revised World Health Organisation principles and recommendations on infant feeding... -
No evidence for avoidance of black rat scent by the presumably less competitive Natal multimammate mouse in a choice experiment
Item type: Journal Article • Journal: African Zoology • Authors: Laura N Cuypers --- Evolutionary Ecology Group, Belgium Wim L Cuypers --- Evolutionary Ecology Group, Belgium Amélie Gildemyn-Blomme --- Evolutionary Ecology Group, Belgium Laura Abraham --- Evolutionary Ecology Group, Belgium Senne Aertbeliën --- Evolutionary Ecology Group, Belgium Apia W Massawe --- Pest Management Centre, Tanzania Benny Borremans --- Evolutionary Ecology Group, Belgium Sophie Gryseels --- Evolutionary Ecology Group, Belgium Herwig Leirs --- Evolutionary Ecology Group, BelgiumIn Africa, indigenous multimammate mice (Mastomys natalensis) only appear to live commensally in houses when invasive black rats (Rattus rattus) are absent, yet little is known about the underlying mechanism. Avoidance through smell may cause the absence of M. natalensis... -
Factors influencing post-partum women’s choice of an implantable contraceptive device in a rural district hospital in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Francois Potgieter --- Department of Family and Emergency Medicine, South Africa Paul Kapp --- Department of Family and Emergency Medicine, South Africa Francois Coetzee --- Ukwanda Centre for Rural Health, South AfricaBackground: A single-rod subdermal contraceptive implant containing 68 mg of etonogestrel, ImplanonNXT®, was introduced to the South African healthcare system in 2014. Initially the new device was well received but later uptake tapered off. A need was identified to determine the... -
My generation: A review of marketing strategies on different age groups
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Emilie Slootweg --- Stenden Hotel School, The Netherlands Bill Rowson --- Stenden Hotel School, The NetherlandsAs the famous pop group, the Who, sang “My generation”, referring to the wants and needs of their fans and popular culture in the mid-1960s, change was in the air. In the early 21st century an ever more complex world... -
Determinants of Consumers’ Choice and Willingness to Pay for Biofortified Pearl Millet in Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: Silas O. Ongudi --- Department of Agricultural Economics and Agribusiness Management, Kenya M.W. Ngigi --- Department of Agricultural Economics and Agribusiness Management, Kenya P.K. Kimurto --- Department of Crops, Horticulture and Crop Sciences, KenyaGlobally, micronutrient deficiency is a major health concern as more than two billion people suffer from iron deficiency, 1.75 billion are at risk of low zinc intake, while 127 million pre-school children suffer from vitamin A deficiency. Consumption of iron... -
Knowledge of final-year medical students at the University of KwaZulu-Natal about family medicine, and long-term career choices
Item type: Journal Article • Journal: South African Family Practice • Authors: R Omed Ali --- Department of Family Medicine, South Africa AJ Ross --- Department of Family Medicine, South Africa TC Nkabinde --- Department of Family Medicine, South AfricaBackground: While international experience suggests that well-trained primary care physicians improve the quality and cost effectiveness of health care, family medicine (FM) as the discipline of the specialist primary care physician appears to not be an attractive career for medical... -
Dominant factors for energy choice decisions by households in Tanzania: A case study of selected villages in Mvomero District
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Felichesmi Selestine Lyakurwa --- Faculty of Science and Technology, Eliaza Mkuna --- Faculty of Social Sciences,Household choice of energy sources for various social-economic activities has been associated with improved community livelihood and ecosystem quality. In this study, the multinomial probit model (MNP) was employed to establish the dominant factors for energy choice decisions by households... -
Validity and reliability of a questionnaire developed to explore nutrition determinants among construction workers in Gauteng, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Chioma Okoro --- School of Civil Engineering and Built Environment, Department of Construction Management and Quantity Surveying, Innocent Musonda --- School of Civil Engineering and Built Environment, Department of Construction Management and Quantity Surveying, Justus Agumba --- School of Civil Engineering and Built Environment, Department of Construction Management and Quantity Surveying,Objectives: The nutrition of construction workers is related to their health and safety (H&S) at work. Research on the factors influencing construction workers’ food choices and overall nutrition is limited, in South Africa and indeed Africa as a whole. The... -
How do firms combine different types of innovation? A multivariate probit approach
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: George Abuchi Agwu --- Department of Economics and Development Studies, Nigeria Tobechi Agbanike --- Department of Economics and Development Studies, Nigeria Nkechinyere Uwajumogu --- Department of Economics and Development Studies, Nigeria R. Anuli Ogbuagu --- Department of Economics and Development Studies, NigeriaWhen previous studies relate innovation behaviours to firm heterogeneity, they consider mainly product and process innovations. In this paper, we consider a wider range of types of innovation that firms could combine to form different innovation strategies. Using the multivariate... -
Farmers’ knowledge, attitudes, and perceptions for the adoption of in-field rainwater harvesting (IRWH) technique in Thaba Nchu, South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Admire Rukudzo Dzvene --- , South Africa Weldemichael Tesfuhuney --- , South Africa Sue Walker --- , South Africa Andries Fourie --- , South Africa Cobus Botha --- , South Africa Gert Ceronio --- , South AfricaA systematic engagement strategy was used to identify contextual factors that prevent farmers from accepting the in-field rainwater harvesting (IRWH) technique. The purpose of the qualitative study is to assess farmers’ knowledge and attitudes about the technique, as well as... -
Education’s effect on food and monetary security in Burkina Faso: A joint semi-parametric and spatial analysis
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ibrahim Niankara --- , UAEThough adversely impacted by the recent COVID-19 crisis, households’ consumption of food and non-food items are essential components of well-being worldwide. Against this background, the present analysis tests human capital theory predictions by assessing the resilience effect of formal education... -
Difficult choices: Infant feeding experiences of HIV-positive mothers in northern Tanzania
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Sebalda Charles Leshabari --- Muhimbili University College of Health Sciences, Astrid Blystad --- University of Bergen, Karen Marie Moland --- Bergen University College,Infant feeding represents a great challenge in the prevention of mother-to-child transmission of HIV (pMTCT). The international guidelines informing infant feeding counselling suggest feeding methods that reduce the risk of HIV transmission, and discourage mixed feeding (combining breastfeeding with other... -
Considering childbearing in the age of highly active antiretroviral therapy (HAART): Views of HIV-positive couples
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Vezumuzi Ndlovu [CXX0001]Objectives: Based on a qualitative study conducted in Bulawayo, Zimbabwe, this article examines how the availability of HAART since April 2004 may impact the views and choices of HIV-positive couples on childbearing. Methods: In-depth interviews were conducted with 15 couples... -
Interplay between economic empowerment and sexual behaviour and practices of migrant workers within the context of HIV and AIDS in the Lesotho textile industry
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Pius Tangwe Tanga --- , , South Africa Magdaline Nji Tangwe --- , , South AfricaEconomic empowerment brings with it a wide range of consequences, both positive and negative. The objective of this paper was to examine the relationship between economic empowerment and the sexual behaviour and practices of migrant workers within the context of... -
An Engel–Kollat–Blackwell model application on restaurant clientele purchase decision-making processes in commercial eateries in Kakamega County, Kenya
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Simon O. Were --- Masinde Muliro University of Science & Technology, KenyaRestaurant clientele have a task of making critical decisions concerning their choices of food and drinks. The decision-making process involves, firstly, the selection of the restaurant in which to have a meal and, secondly, the selection of food items from... -
Afrocentric triple helix: A communal perspective on addressing Africa’s economic and social challenges
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Motolani Agbebi --- University of Tampere, Finland Jianing Song --- University of Manchester, UK Aminu Mamman --- University of Manchester, UK Nabil Baydoun --- Academic Affairs, Vice Chancellor Office, Hamdan Bin Mohammed Smart University, United Arab EmiratesThat collaboration has always been the foundation of human development as well as the coping strategy of some animal species is a view widely shared by scholars. In fact, no individual, organization or nation can produce everything it needs without... -
Perceived barriers and enablers for consuming a diverse diet in women residing in resource-poor communities in Cape Town, South Africa: a qualitative study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Samukelisiwe S Madlala --- South African Medical Research Council, South Africa Jillian Hill --- South African Medical Research Council, South Africa Ernesta Kunneke --- University of the Western Cape, South Africa Mieke Faber --- South African Medical Research Council, South Africa -
Banaschewski compactifications via special rings of functions in the absence of the Axiom of Choice
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Alireza Olfati --- Yasouj University, Iran Eliza Wajch --- University of Siedlce, PolandFor a topological space is the ring of all continuous real functions f on X such that, for every real number ϵ > 0, there exists a countable clopen cover of X such that the oscillation of f on each... -
A hybrid regularization method for simultaneous inversion of source term and initial value in a time-fractional diffusion equation
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jin Wen --- Northwest Normal University, P.R. China Yong-Ping Wang --- Northwest Normal University, P.R. China Li-Ming Huang --- Northwest Normal University, P.R. China Donal O’Regan --- University of Galway, IrelandThis paper considers an inverse problem to find the space-dependent source term and initial data simultaneously in a time-fractional diffusion equation. This inverse problem is usually ill-posed, that is, small errors in the measurement typically lead to large errors in... -
Drivers of food choice in three urban communities in South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Nazeeia Sayed --- University of the Western Cape, South Africa Elizabeth Catherina Swart --- University of the Western Cape, South Africa -
The self-reported influence of social media on food choices of young adults at a tertiary institution in South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: M Kreft --- Stellenbosch University, Stellenbosch, South Africa, C Lombard --- Stellenbosch University, Stellenbosch, South Africa, N Koen --- Stellenbosch University, Stellenbosch, South Africa, -
Choiceless Choices: Constructing the Female Child’s Body in Tola Rotimi Abraham’s Black Sunday
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Dalitsani Lucy Anselmo --- University of Malawi, Malawi Nick Mdika Tembo --- University of Malawi, MalawiThis article investigates constructions of the female child’s body in Tola Rotimi Abraham’s Black Sunday. It is premised on the idea that society discursively constructs (condemns) female children as tacit subjects in the Nigeria depicted in the novel; and that...
