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The Potch System: An approach to the management of semi‐arid grasslands in southern Africa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: R.H. Drewes --- Department of Agricultural Development, Republic of South AfricaA host of grassland management systems have been published and recommended. Whereas earlier approaches to grassland management emphasized the systematic resting aspect, the systems published since 1966 have tended to stress the degree of utilization of the grassland sward. In... -
The potential effect of environmental conditions on the growth of irrigated cool season pastures in the Dohne Sourveld
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: c. J.G le Roux --- Dohne Agricultural Centre, Republic of South Africa L.G. Howe --- Dohne Agricultural Centre, Republic of South Africa L.P. du Toit --- Dohne Agricultural Centre, Republic of South Africa W. Iveson --- Dohne Agricultural Centre, Republic of South AfricaFour temperate grasses (Festuca arundinaceae, Festuca X Lolium hybrid, Lolium boucheanum and Lolium multiflorum) were grown under irrigation at the Dohne Agricultural Centre. The object was to determine the monthly growth and nutritional value of the grasses. The effects of... -
Measurements of mineralization, nitrification and denitrification in laboratory incubations of soil from a semi-arid natural grassland
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du preez --- Department of Soil Science, Republic of South AfricaExperiments were done to compare three incubation methods after it was found that prolonged incubation of soil in sealed preserving jars resulted in the exhaustion of head- space oxygen and anaerobiosis in the soil. Nitrate added to soil from the... -
Effects of sample drying temperature on indices of available nitrogen in soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaDuring a field trial investigation into the long-term effects of conservation practices on the nitrogen fertility of a soil cropped annually to wheat, it was observed that sample preparation had an effect on some indices of available nitrogen. The trial... -
Effect of soil fertility management strategies and resource-endowment on spatial soil fertility gradients, plant nutrient uptake and maize growth at two smallholder areas, north-western Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Nyamangara --- Department of Soil Science and Agricultural Engineering, Zimbabwe E. Makarimayi --- Department of Soil Science and Agricultural Engineering, Zimbabwe E.N. Masvaya --- Department of Soil Science and Agricultural Engineering, Zimbabwe S. Zingore --- , Malawi R.J. Delve --- , ZimbabweWe investigate the effects of smallholder farmer resource—endowment and soil nutrient management strategies on plant nutrient uptake and growth across soil fertility gradients under semi-arid conditions. Soil fertility gradients as influenced by farmers’ resource availability may affect the response of... -
ZOOPLANKTON AND ENVIRONMENTAL CONDITIONS IN GROENVLEI, SOUTHERN CAPE, DURING 1976
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.J. Coetzee --- Cape Department of Nature and Environmental Conservation, South AfricaThe zooplankton and environmental conditions in Groenvlei were studied during 1976 as part of an overall ecological study of the zooplankton of the Wilderness Lakes system. The Groenvlei water was found to be well mixed and low in dissolved PO4−P,... -
ZOOPLANKTON AND ENVIRONMENTAL CONDITIONS IN A SOUTHERN CAPE COASTAL LAKE SYSTEM
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.J. Coetzee --- Cape Department of Nature and Environmental Conservation, South AfricaThe usually natural closing and artificial opening of the Tow River mouth to the sea have a major influence on the physico-chemical environmental conditions in the coastal lake system formed by the Tow River, Eilandvlei, Langvlei and Rondevlei, as it... -
Habitat factors influencing the distribution of Cymbopogon validus in Mkambati game reserve, Transkei
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SheonaE. Shackleton --- Department of Botany, Republic of South Africa C.M. Shackleton --- Department of Botany, Republic of South AfricaThe factors influencing the distribution of Cymbopogon validus in Mkambati Game Reserve were investigated using multivariate techniques. C. validus was found to be present on nutrient‐rich, clay soils and absent from dystrophic, sandy soils. This could account for the patchy... -
Training of Professional Psychologists for Africa: Community Psychology or Community Work?
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Olaniyi Bojuwoye --- University of Kwazulu-Natal, South AfricaIf the practice of psychology is to be relevant to environmental realities and context sensitive then conscious consideration must be given to the psychology training programme. Training programmes should give due recognition to the historical, political, social, economic and cultural... -
Job Demands and Resources, Psychological Conditions, Religious Coping and Work Engagement of Reformed Church Ministers
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sebastiaan Rothmann --- North-West University, South Africa Chenelle Buys --- North-West University, South AfricaThis study investigated the relation between job demands and resources, psychological conditions, religious coping and work engagement of Reformed Church ministers. A cross-sectional survey design was used. Participants were 115 Reformed Church ministers (age range = 25 to 65, Afrikaans... -
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Some banach space properties of E φ [0, 1]
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Diomedes BárcenasWe prove several Banach spaces properties of E φ [0, 1], many of them concerning to the Δ2 condition and the presence of c 0 and l 1 in those Banach spaces. -
Efficient spectral-Petrov-Galerkin methods for third- and fifth-order differential equations using general parameters generalized Jacobi polynomials
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: W.M. Abd-Elhameed --- Department of Mathematics, Faculty of Science, Saudi Arabia E.H. Doha --- Department of Mathematics, Faculty of Science, Giza-Egypt Y.H. Youssri --- Department of Mathematics, Faculty of Science, Giza-EgyptTwo new families of general parameters generalized Jacobi polynomials are introduced. Some efficient and accurate algorithms based on these families are developed and implemented for solving third- and fifth-order differential equations in one variable subject to homogeneous and nonhomogeneous boundary... -
Necessary and sufficient conditions for approximate strong invariance for semilinear differential inclusions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Alina Ilinca Lazu --- Department of Mathematics, Romania Victor Postolache --- Department of Mathematics, RomaniaWe establish necessary and sufficient conditions for approximate strong invariance referring to semilinear differential inclusions, conditions expressed in terms of a suitable defined tangency concept. -
Perceptions of HIV/AIDS leaders about faith-based organisations’ influence on HIV/AIDS stigma in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Mpoe Johannah Keikelame --- Directorate of Primary Health Care, Faculty of Health Sciences, South Africa ColleenK Murphy --- , United States KarinE Ringheim --- , United States Sara Woldehanna --- , United StatesThe extent of the HIV pandemic—particularly in the hardest-hit countries, including South Africa—has prompted a call for greater engagement of all groups, including faith-based organisations (FBOs). Although FBOs are known to play a substantial role in providing care and support... -
Human-rights perspectives on caregiving of people with HIV: the case for the Kanye home-based care programme, Botswana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: SimonM Kang'ethe --- Department of Adult Education, Centre for Continuous Education, BotswanaThe article discusses the human rights associated with caregiving to people with HIV or AIDS, based on empirical findings about a community home-based care programme in Kanye, Botswana. The study was explorative in nature and qualitative in design and used... -
Courting success in HIV/AIDS prevention: the challenges of addressing aconcentrated epidemic in Senegal
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: EllenE Foley --- , United States Rokhaya Nguer --- , SenegalThis article presents findings from a study of HIV/AIDS programmes for urban sex workers in Dakar, Senegal. The objective of the research was to assess HIV prevention and treatment efforts to date, and to identify challenges that must be overcome... -
Comparative analysis of the aquaculture potential of hybrid Tilapia zillii (male) × T. guineensis (female) (Teleostei: Cichlidae) in floating cages, cement tanks and earth ponds
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CélineSK Nobah Tidiani Koné Valentin N'Douba Jos Snoeks Gouli Gooré Bi EssetchiP KouamélanThe effect of three rearing systems, floating cages, cement tanks and earth ponds, on the growth rate, feeding efficiency and mortality rates of hybrid tilapia — Tilapia zillii (male) × T. guineensis (female) — was evaluated for 233 days. Fish... -
Growth and survival of the South African scallop Pecten sulcicostatus in suspended culture
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: DCZ Arendse --- Department of Agriculture, Forestry and Fisheries, South Africa GC Pitcher --- Department of Agriculture, Forestry and Fisheries, South AfricaGrow-out studies of the scallop Pecten sulcicostatus, endemic to the South African coast, contribute to an investigation of the suitability of this species for commercial culture. Hatchery-reared juvenile scallops were placed in a suspended culture system at 5 m depth... -
Women's health, HIV/AIDS and the workplace in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Courtenay SpragueThis work explores the connections between gender inequality, HIV/AIDS and women's health in the world of work in South Africa. These connections are located within a context of significant reversals in development, specifically declining life expectancy and premature mortality for... -
A model for understanding the relationship between stigma and healthcare-seeking behaviour among people living with HIV/AIDS in sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: NgoziC Mbonu --- Department of Health Promotion, The School for Public Health and Primary Care (CAPHRI), Faculty of Health, Medicine and Life Sciences, The Netherlands Bart Van den Borne --- Department of Health Promotion, The School for Public Health and Primary Care (CAPHRI), Faculty of Health, Medicine and Life Sciences, The Netherlands NanneK De Vries --- Department of Health Promotion, The School for Public Health and Primary Care (CAPHRI), Faculty of Health, Medicine and Life Sciences, The NetherlandsPeople living with HIV or AIDS (PLHIV) in sub-Saharan Africa sometimes have care-seeking behaviours that result in a suboptimal quality of life. This paper seeks to examine the role of stigma in the care-seeking behaviour of PLHIV. We hypothesise that... -
Rural black women's agency within intimate partnerships amid the South African HIV epidemic
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Britta Thege --- Department of Sociology, South AfricaIn a particular way, the HIV pandemic exposes the prevailing gender relations and the definitions of male and female gender roles, both in intimate relationships and in the wider society. The HIV pandemic reveals the contradictions between women's legal rights... -
A multidisciplinary study of a small, temporarily open/closed South African estuary, with particular emphasis on the influence of mouth state on the ecology of the system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AK Whitfield JB Adams GC Bate K Bezuidenhout TG Bornman PD Cowley PW Froneman PT Gama NC James B Mackenzie T Riddin GC Snow NA Strydom S Taljaard AI Terörde AK Theron JK Turpie L van Niekerk PD Vorwerk TH WooldridgeIn 2005/2006 a multidisciplinary research programme that included studies on the hydrodynamics, sediment dynamics, macronutrients, microalgae, macrophytes, zoobenthos, hyperbenthos, zooplankton, ichthyoplankton, fish and birds of the temporarily open/closed East Kleinemonde Estuary was conducted. Particular attention was given to the responses... -
Population dynamics of potentially harmful algal blooms in Bizerte Lagoon, Tunisia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Bouchouicha Smida --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie I Sahraoui --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie B Grami --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie H Hadj Mabrouk --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie A Sakka Hlaili --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, TunisieThe population dynamics of potentially harmful phytoplankton in the semi-closed, coastal Bizerte Lagoon, Tunisia, in the south-western Mediterranean, were examined from November 2007 to February 2009 at six sampling stations, three situated in areas of mussel and oyster farming. The... -
Doctors' views of working conditions in rural hospitals in the Western Cape
Item type: Journal Article • Journal: South African Family Practice • Authors: MR De Villiers --- Department of Family Medicine and Primary Care, Faculty of Health Sciences, PJT De Villiers --- Department of Family Medicine and Primary Care, Faculty of Health Sciences,There has been a lively debate in the media about working conditions in rural South African hospitals, with a particular focus on staffing and quality of care. From a medical perspective, it has been stated that poorly equipped and managed... -
Systemic isotretinoin in the management of acne—a patient questionnaire survey
Item type: Journal Article • Journal: South African Family Practice • Authors: S Burger --- Drug Utilization Research Unit, Department of Pharmacy, South Africa I Truter --- Drug Utilization Research Unit, Department of Pharmacy, South Africa SM Blignault --- Drug Utilization Research Unit, Department of Pharmacy, South Africa DJL Venter --- Department of Statistics, South AfricaBackground: The primary aim was to investigate the appropriateness (as outlined in the South African Acne Treatment Guideline1) for the prescription of systemic isotretinoin in the management and counselling of acne in the Nelson Mandela Bay Metropole. -
The prevalence of erectile dysfunction at a primary healthcare clinic in Durban, KwaZulu-Natal
Item type: Journal Article • Journal: South African Family Practice • Authors: Y Lockhat --- King Dinuzulu Hospital, A Ross --- Department of Family Medicine, P Ramlachan --- University of Sydney, Australia C Rangiah --- Department of Family Medicine,Objectives: The objectives of this study were to determine the prevalence of erectile dysfunction (ED) in men attending a primary healthcare (PHC) clinic in Durban, KwaZulu-Natal, and to document any relationship between ED and age, smoking, economic status and co-morbid... -
Consultation outcomes for musculoskeletal conditions at two community health centres in Cape Town
Item type: Journal Article • Journal: South African Family Practice • Authors: MK Namane --- Metro District Health Services, Western Cape Department of Health, Community Health Division and Family Medicine Division, Faculty of Health Sciences, Stellenbosch and Family Medicine Division, Faculty of Health Sciences, AA Kalla --- Head of Unit, Rheumatic Diseases Unit, Faculty of Health Sciences, TN Young --- Centre for Evidence-Based Medicine, Community Health Division Faculty of Health Sciences,Objectives: To compare the proportion of patients with documented diagnoses and management plans when they presented with musculoskeletal complaints at two community health centres (CHCs) using two models of care: one with a rheumatology outreach service and the other with... -
Conditions frequently self-treated with herbal remedies by patients visiting a tertiary hospital in Gauteng, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: André Marais --- Faculty of Health Sciences, School of Medicine, Department of Pharmacology, South Africa Vanessa Steenkamp --- Faculty of Health Sciences, School of Medicine, Department of Pharmacology, South Africa Wim J Du Plooy --- Department of Pharmacology and Therapeutics, South AfricaBackground: Herbal medications are used worldwide for a variety of diseases and conditions. Patients often elect not to disclose their herbal use history, or health care practitioners fail to enquire about specific alternative therapy. The aim of this study was... -
Are melanistic populations of the Karoo girdled lizard, Karusasaurus polyzonus, relics or ecotypes? A molecular investigation
Item type: Journal Article • Journal: African Zoology • Authors: Hanlie M. Engelbrecht --- Department of Botany and Zoology, South Africa P. le Fras N. Mouton --- Department of Botany and Zoology, South Africa Savel R. Daniels --- Department of Botany and Zoology, South AfricaIt has been proposed that melanism in cordylids evolved in response to a single climatic event and that melanistic populations of Karusasaurus polyzonus are relictual. This study investigates the genetic relationships of melanistic and non-melanistic populations of K. polyzonus along... -
A Note: The SAICA Part I Qualifying Examinations: Factors that may influence candidates’ success
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: E van Wyk --- Department of Accountancy,The study investigates certain factors characterising successful and unsuccessful candidates in the 2009 and 2010 SAICA Part I Qualifying Examination (QE I) with the purpose of making recommendations to candidates, educators, training centres and to SAICA. The study also aims... -
Mergers and Acquisitions in Africa: A Review and an Emerging Research Agenda
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Kimberly M. Ellis --- Florida Atlantic University, Management Programs, USA Bruce T. Lamont --- Florida State University, Entrepreneurship, Strategy, and Information Systems, USA Taco H. Reus --- Erasmus University, Strategic Management and Entrepreneurship, the Netherlands Leon Faifman --- Florida Atlantic University, Management Programs, USAThis article identifies and reviews existing merger and acquisition (M&A) studies focused on African markets. In this review, the factors mentioned directly or alluded to in the existing studies that distinguish African countries as target nations from other countries traditionally... -
All at sea: Insights into crew work experiences on a cruise liner
Item type: Journal Article • Journal: • Authors: Ester Ellen Trees Bolt --- Academy of International Hospitality Research, Stenden University of Applied Sciences, Leeuwarden, The Netherlands Conrad Lashley --- International Hotel Management School, Stenden University of Applied Sciences, Leeuwarden, The NetherlandsThis research explores employee experiences of working on board a cruise ship. Cruise liners have been described as floating hotels; but increasingly they are more like floating resorts, embracing passenger and crew populations as big as small towns. In addition to the... -
Psychological availability and work engagement: The moderating role of sex and race
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karolina Łaba --- Department of Industrial Psychology and People Management, South Africa Madelyn Geldenhuys --- Department of Industrial Psychology and People Management, South AfricaThis study sought to determine the relationship of sex and race as moderators of psychological availability on work engagement in various South African organisations. Participants were 1 059 employees predominantly from the corporate sector in Gauteng province (females = 61%,... -
Investigation of the coexistence of CKD and non-communicable chronic diseases in a PBM company in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: WP Meuwesen --- Medicine Usage in South Africa (MUSA), South Africa JM du Plessis --- Medicine Usage in South Africa (MUSA), South Africa JR Burger --- Medicine Usage in South Africa (MUSA), South Africa MS Lubbe --- Medicine Usage in South Africa (MUSA), South Africa M Cockeran --- Medicine Usage in South Africa (MUSA), South AfricaBackground: Chronic kidney disease (CKD) is a public health problem, with increasing global prevalence. Several factors could influence the prognosis of CKD, including comorbid chronic conditions. This study investigated the coexistence of CKD and non-communicable chronic diseases in the private... -
Suspended silt and salinity tolerances of the first zoeal stage of the fiddler crab Uca annulipes (Decapoda: Brachyura) and why marine connectivity is essential to the survival of the species
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Peer --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa NAF Miranda --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa R Perissinotto --- DST/NRF Research Chair in Shallow Water Ecosystems, South AfricaFiddler crabs (Uca spp.) undergo the zoeal stage of development in open-ocean waters, where they experience stable salinity levels, low turbidity and reduced predation. The St Lucia estuarine system has undergone many geomorphological changes, both natural and anthropogenic, and the... -
All at sea: Insights into crew work experiences on a cruise liner
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Ester Ellen Trees Bolt --- Academy of International Hospitality Research, Stenden University of Applied Sciences, The Netherlands Conrad Lashley --- International Hotel Management School, Stenden University of Applied Sciences, The NetherlandsThis research explores employee experiences of working on board a cruise ship. Cruise liners have been described as floating hotels; but increasingly they are more like floating resorts, embracing passenger and crew populations as big as small towns. In addition... -
Fish recruitment into a South African temporarily open/closed temperate estuary during three different hydrological mouth phases
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GP Tweddle --- Department of Zoology, South Africa PW Froneman --- Department of Zoology and Entomology, South AfricaQuantitative recruitment of ichthyofauna into a South African temporarily open/closed estuary (TOCE) was investigated during three distinct hydrological phases: closed overwash, open outflow and tidal mouth conditions. Maximum recruitment densities occurred during outflow conditions and declined when the system became... -
The role of children in their HIV-positive parents’ management of antiretroviral therapy in Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ruth Nalugya --- Medical Research Council/Uganda Virus Research Institute, Uganda Steven Russell --- School of International Development, UK Flavia Zalwango --- Medical Research Council/Uganda Virus Research Institute, Uganda Janet Seeley --- Medical Research Council/Uganda Virus Research Institute, UgandaAdjustment to life on antiretroviral therapy (ART) and living with HIV as a long-term chronic condition, pose significant medical, social and economic challenges. We investigated children’s role in supporting HIV-positive parents to self-manage life on ART. Between 2010 and 2012,... -
Alcohol use and problem drinking in South Africa: Results from a national-population-based survey 2014-2015
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- HIV/AIDS/STIs/and TB (HAST), South Africa Supa Pengpid --- Department of Research and Innovation, South AfricaThe aim of this study was to estimate the pattern of alcohol use among South African adults by their socio-demographic and health status indicators. We analysed data from a 2014–2015 South African national population-based survey which sampled 22 752 adults... -
An analytical-numerical approach in the calculation of photovoltaic module parameters operating under partial shaded conditions
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Abdouramani Dadjé --- Department of Renewable Energy, National Advanced School of Engineering of Maroua, Cameroon Noël Djongyang --- Department of Renewable Energy, National Advanced School of Engineering of Maroua, Cameroon Réné Tchinda --- LISIE, Fotso Victor University Institute of Technology, CameroonThe aim of this work is to determine the parameters and characteristics of a PV module in case of partial shading conditions. Both numerical and analytical methods are used in order to attain this objective. The iterative method namely Newton-Raphson... -
Yields of Green Grams and Pigeonpeas under Smallholder Conditions in Machakos County, Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: John Mulwa Wambua --- Department of Agricultural Economics and Agribusiness, Kenya Margaret Ngigi --- Department of Agricultural Economics and Agribusiness, Kenya Muhammad Lutta --- Kenya Agricultural and Livestock Research Organization, KenyaGreen grams and pigeonpeas have multiple benefits to the rural poor as food security, fodder for livestock and fuel for small-scale farmers, despite low smallholder yields in Kenya. However, little is known about the factors between different farmers that influence... -
Review of anthropogenic threats and biodiversity assessment of an Ethiopian soda lake, Lake Abijata
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Wagaw --- Department of Biology, Ethiopia S Mengistou --- Department of Zoological Sciences, Ethiopia A Getahun --- Department of Zoological Sciences, EthiopiaThe intention of this review is to assess the impact of anthropogenic activities on the biodiversity of Lake Abijata. The lake was established as a National Park, together with Lakes Shalla and Chitu, to conserve water birds. It has high... -
The social and technical conditions enabling innovations in information infrastructures: A case study from public health in Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Masoud Hussein Mahundi --- Department of Computer Science and Engineering, Tanzania Petter Nielsen --- Department of Informatics, Norway Honest Kimaro --- Department of Computer Science and Engineering, TanzaniaOne of the hallmark characteristics of information infrastructures is their gradual evolution to adapt to changes in technologies and requirements from diverse user groups. Evolution manifests through innovations on and within infrastructures as they respond to the changes. These innovations,... -
A tale of records from Hakskeen Pan, the first record of Pumilibranchipus deserti Hamer and Brendonck, 1995 (Anostraca, Branchiopoda) from South Africa and the pursuit of a new world land speed record
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: E Meyer-Milne --- South African Environmental Observation Network, South Africa MC Mlambo --- Department of Freshwater Invertebrates, Albany Museum, South AfricaUntil now, Pumilibranchipus deserti was known from only one locality in Namibia. This paper reports the first record of this species from South Africa in Hakskeen Pan, Northern Cape, which represents a new, easterly range extension of the known distribution... -
Effects of prolonged mouth closure in a temporarily open/closed estuary: a summary of the responses of invertebrate communities in the uMdloti Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: UM Scharler --- School of Life Sciences, South Africa K Lechman --- School of Life Sciences, South Africa T Radebe --- School of Life Sciences, South Africa HL Jerling --- Department of Zoology, South AfricaProlonged mouth closure in estuaries is often associated with hypersalinity, mainly as a result of reduced freshwater inflow. However, on the KwaZulu-Natal coast, South Africa, temporarily open/closed estuaries have a tendency towards hyposalinity during closed mouth conditions, primarily because of... -
Absent fathers: Psychological and socio-economic implications for black children and directions for future research
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Simnikiwe Magqamfana --- Department of Psychology, South Africa Sandiso Bazana --- Department of Psychology, South AfricaThis study investigated fathers’ absence influences on the self-perceptions of South African young adults. Informants were five black university students (two females, three males; age range 20 to 28 years). They responded to semi-structured face-to-face interviews on self-perceptions from having... -
Mental morbidity and its associations with socio-behavioural factors and chronic conditions in rural middle- and older-aged adults in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Supa Pengpid --- , Thailand Karl Peltzer --- , VietnamThis study investigated mental morbidity and its association with socio-behavioural health and chronic health conditions among rural middle-older persons in South African (N = 5 059 adults; females = 53.6%; mean age = 62.4 years, SD = 13.1 years). We... -
Diversity of macrophytes in relation to environmental conditions in wetlands along the lower part of the Gilgel Abay River catchment in Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Habtamu Getnet --- , Ethiopia Seyoum Mengistou --- , Ethiopia Bikila Warkineh --- , EthiopiaThe environmental conditions in wetlands affect the diversity, composition, and distribution of their macrophyte communities. This study investigated the diversity of macrophytes as related to environmental conditions in wetlands of the lower part of Gilgel Abay River catchment in Ethiopia... -
Investigating the effects of hypersalinity on the cardiac performance of the invasive gastropod Melanoides tuberculata (Müller, 1774)
Item type: Journal Article • Journal: African Zoology • Authors: TJ de Haas --- , South Africa LJ Connell --- , South Africa R Greenfield --- , South AfricaAnthropogenic activities have propelled the exploitation of natural environments, which along with climate change have resulted in salinity intrusion to freshwater ecosystems worldwide. To determine the extent the hypersalinity stressor has on freshwater ecosystems, physiological cardiac responses in the freshwater... -
Germination performance of different forage grass species at different salinity (NaCl) concentrations
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Mangwane --- , South Africa IC Madakadze --- , South Africa FV Nherera-Chokuda --- , South Africa S Dube --- , Zimbabwe M Mndela --- , South AfricaCertain grasses show potential for the rehabilitation of coalmine spoils. Species selection and evaluation are used to guide the choice of the most appropriate grass species. This study evaluated the germination performance of seven forage grass species, with some represented... -
IoT-powered system for environmental conditions monitoring in poultry house: A case of Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Beston Lufyagila --- , Tanzania Dina Machuve --- , Tanzania Thomas Clemen --- , GermanyPoultry health is imperative for the continued growth of poultry and increased production. Environmental conditions such as temperature, humidity, and ammonia gas have an impact on poultry health. They affect the respiratory system and eventually cause death. In Tanzania, most... -
Flow alterations and nutrient loading reduce primary producer variability in a temporarily closed microtidal estuary in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Monique Nunes --- , South Africa Daniel A Lemley --- , South Africa Janine B Adams --- , South AfricaPrimary producer responses to cumulative regulating factors were investigated in a temporarily closed microtidal estuary. We hypothesised that the phytoplankton chlorophyll-a concentration (Chl a) and invasive alien aquatic plant (IAAP) abundance would be highest during the low-flow season and that... -
The problem with non-separated multipoint-integral conditions for high-order differential equations and a new general solution
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Anar T. Assanova --- Institute of Mathematics and Mathematical Modeling, Kazakhstan Askarbek E. Imanchiyev --- Institute of Mathematics and Mathematical Modeling, KazakhstanThe problem with non-separated multipoint-integral conditions for high-order differential equations is considered. An interval is divided into m parts, the values of a solution at the beginning points of the subintervals are considered as additional parameters, and the high-order differential... -
A new type Sturm-Liouville problem with an abstract linear operator contained in the equation
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: K. Aydemir --- Amasya University, Turkey O.Sh. Mukhtarov --- Tokat Gaziosmanpaşa University, TurkeyIn this study we shall introduce to the consideration a new type Sturm-Liouville problem, which differs from the standard problems in that it contain nondifferential term in the equation. Namely, the equation contains an abstract linear operator B, which may... -
People living with HIV and AIDS in everyday conditions of township life in South Africa: between structural constraint and individual tactics
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Frédéric Le Marcis --- Department of Social Anthropology, University of Victor Segalen, Rehana Ebrahim-Vally --- University of the Witwatersrand,The HIV/AIDS pandemic in South Africa has negatively transformed the lives of many in townships and rural areas. People living with AIDS (PWAs) are the socially weakened, whose means of survival include migrating, enduring gender violence, and they are thus... -
Are environmental conditions in the eyes of the beholder? Foreign and local firms in Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Lilac Nachum --- Baruch College, City University New York, USA Chris Ogbechie --- Lagos Business School, NigeriaInternational business research has provided substantial empirical evidence that foreign firms investing in countries with adverse environmental conditions may emerge as the main competitors in those countries. Against this backdrop, the dominance of local banks in Nigeria is puzzling. Our... -
Eigenvalues of Sturm-Liouville problems with distributional potentials and eigenparameter-dependent boundary conditions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ji-Jun Ao --- Inner Mongolia University of Technology, China Meng-Lei Li --- Inner Mongolia University of Technology, China Hai-Yan Zhang --- Inner Mongolia University of Technology, ChinaIn this paper, regular Sturm-Liouville problems with distributional potentials and eigenparameter-dependent boundary conditions are investigated. We obtain that the eigenvalues of the problems depend not only continuously but also smoothly on the parameters of the problem: the coefficients, the boundary... -
Some sharpened and refined versions of the q—Steffensen inequality
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ksenija Smoljak Kalamir --- University of Zagreb, CroatiaBased on a known sharpened and refined versions of a classical Steffensen inequality, we derive new sharpened and refined versions of a q–Steffensen inequality. Next, we give weaker conditions for some already known generalizations of q–Steffensen’s inequality and for new... -
Approximate controllability of non-instantaneous impulsive semi-linear neutral differential equations with non-local conditions and unbounded delay
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Oscar Camacho --- Universidad San Francisco de Quito USFQ, Ecuador S. Lalvay-Segovia --- , Ecuador Hugo Leiva --- , Ecuador L. Riera-Segura --- , EcuadorIn this work, we study the approximate controllability for retarded neutral differential equations with unbounded delay, non-instantaneous impulses, and non-local conditions. First, we set the problem in a natural Banach phase space satisfying Hale-Kato axiomatic Theory about the phase space... -
Investor sentiments and performance of selected ESG indices in BRICS markets during bull and bear conditions
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Damilola Aboluwodi --- Finance, University of KwaZulu-Natal, South Africa Paul-Francois Muzindutsi --- Finance, University of KwaZulu-Natal, South Africa Bomi Nomlala --- Accounting, University of KwaZulu-Natal, South AfricaSustainability concerns are increasingly shaping global investment decisions, prioritising sustainable impacts over mere profit-making. This study examines the performance of Environmental, Social, and Governance (ESG) funds in emerging markets, focusing on bull and bear market scenarios. A Markov Regime Switching... -
Sociodemographic, mental, and physical health determinants of incident depressive symptoms among ageing men and women in rural South Africa: A longitudinal study from 2015 to 2022
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- University of the Free State, South AfricaWe aimed to assess the associations between sociodemographic, mental, and physical health factors and incident depressive symptoms (IDS) among ageing men and women in rural South Africa over time. Data from the 7-year South African longitudinal Health and Ageing in... -
A study of a Kirchhoff-type p(x)-triharmonic problem involving two parameters
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Xiumei Han --- Shandong University of Science and Technology, P.R. China Zohreh Naghizadeh --- University of Science and Technology of Mazandaran, Iran Binlin Zhang --- Shandong University of Science and Technology, P.R. ChinaOur most significant aim is to guarantee multiplicity results for a Kirchhoff-type problem involving two parameters and p(x)-triharmonic operator subject to the Navier boundary condition. More precisely, two critical point theorems are exploited to attain main theorems. -
Impact of workplace adversity on well-being of Ghanaian bankers: Do resilience and psychological safety matter?
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Justice Mensah --- University of Ghana Business School, Ghana Kwesi Amponsah-Tawiah --- University of Ghana Business School, Ghana Eric Nanteer-Oteng --- University of Ghana Business School, GhanaWe examined the role of resilience and psychological safety in the relationship between perceived workplace adversity and work well-being. Participants were 1257 Ghanaian banking sector employees (male = 49.32, female = 50.68%; age range = 21 to 60 years, mean... -
A class of constant coefficient nonlinear equations that are solvable by the heat kernel
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Sameerah Jamal --- University of the Witwatersrand, South AfricaIn this paper, we document a new tractable method to solve nonlinear classes of partial differential equations subject to initial-values. The method involves a detailed transformation procedure, underpinned by the Lie pint symmetries of the one dimensional heat transfer equation... -
Intrapopulation isotopic niche structure in mammalian carnivores and herbivores across contrasting habitats
Item type: Journal Article • Journal: African Zoology • Authors: Chanel Lewis --- University of the Free State, South Africa Runè van der Merwe --- University of the Free State, South Africa Chabi AMS Djagoun --- University of Abomey-Calavi, Benin Etotépé A Sogbohossou --- University of Abomey-Calavi, Benin Daryl Codron --- University of the Free State, South AfricaNatural communities exhibit ecological gradients that result in a variety of competitive interactions and variations in niche patterns. Changes in resource availability affect the size of a species’ niche: it expands when a variety of resources are abundant and contracts... -
Pastures established on rehabilitated surface coal mined land: an assessment of forage production and implications for livestock grazing
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Emmanuel Nkosinathi Cele --- University of Pretoria, South Africa Monde Rapiya --- University of Pretoria, South Africa Wayne Sanders --- University of Pretoria, South Africa Wayne Truter --- Enterprises University of Pretoria, South AfricaCurrently, land rehabilitation best practice in South Africa is to revegetate ameliorated soil with grass mixtures. These grasses have valuable grazing potential that can deliver great benefits to livestock farmers. However, due to paucity of research and published findings, the... -
Simulated rangeland conditions and seasonal variations influence soil quality in semi-arid central South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JDJ Marx --- University of the Free State, South Africa E Kotzé --- University of the Free State, South Africa JJ van Tol --- University of the Free State, South Africa PF Loke --- University of the Free State, South AfricaThe study examined long-term effects of rangeland conditions and seasonal variations on soil quality without confounding grazing effects. Samples were collected seasonally from good, moderate, poor, bare and cultivated rangeland conditions at soil depths of 0–10 cm and analysed for... -
Growth potential and productivity of the green macroalgae Ulva reticulata in a sustainable farming system in a coastal lagoon at Bambous Virieux, Mauritius
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Nazurally --- Department of Agricultural and Food Science, University of Mauritius, Mauritius D Beehary-Panray --- Environmental Protection and Conservation Organisation (EPCO), Resilient Island Endeavour (RISE) Project, Mauritius EC Gatteschi --- Cooperazione Internazionale Sud Sud (CISS), Resilient Island Endeavour (RISE) Project, ItalyUlva reticulata is a fast-growing green macroalga with high bioremediation and economic potential. Cultivation of this seaweed at Bambous Virieux in southeast Mauritius was undertaken to evaluate its growth potential and biological feasibility in a tropical lagoon. Over a 30-day... -
Effect of entrepreneurial orientation on sustainable financial practices: The roles of dynamic capabilities and institutional conditions
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Divine Atinyo --- University of Cape Coast, Ghana George Tweneboah --- University of Cape Coast, GhanaEntrepreneurial orientation (EO) is increasingly recognized as a vital strategic factor, particularly in volatile business environments. While EO can potentially drive superior sustainable financial practices (SFP), there remains a gap in understanding the underlying mechanisms and contextual factors that complement...
