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The effect of stocking rate and lick supplementation on the performance of lactating beef cows and its impact on Highland Sourveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: A. Van Niekerk --- Department of Agriculture (Natal Region), M.B. Hardy --- Department of Agriculture (Natal Region), B.D. Mappledoram --- Department of Agriculture (Natal Region), S.F. Lesch --- Department of Agriculture (Natal Region),The Highland Sourveld of Natal is an important beef producing area. Although it covers only 13% of the total area of the province, it supports 18% of the beef cattle population. -
Die invloed van swartpunt by gars (Hordeum distichon) op ontkieming en α-amilase-aktiwiteit
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. C.J. Maree --- Departement Akkerbou en Weiding, A. L.P. Caims --- Departement Akkerbou en Weiding,Gesonde garssaad en swartpuntgarssaad vanaf verskillende lokaliteite is vergelyk. Die ontkiemingsenergie van gesonde saad was na een maand beduidend beter as die van swartpuntsaad. Na 'n opbergingperiode van twee tot drie maande het geen verskille in ontkiemingsenergie en -kapasiteit meer... -
A simple, accurate method of estimating maximum total evaporation from a wheat crop during the daylight period
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.H. van Zyl --- Department of Agrometeorology, Republic of South Africa J.M. de Jager --- Department of Agrometeorology, Republic of South Africa C.J. Maree --- Department of Agrometeorology, Republic of South AfricaThe use of empirical relationships for the calculation of the energy and aerodynamic components of the Penman-Monteith equation were tested against measured data. Accurate estimates of maximum total evaporation, Em, from a wheat crop were obtained. The empirical equation utilizes... -
The optimal germination substratum for tomato (Lycopersicon lycopersicum (L.) Karst, ex Farw.) seed testing
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.A. Loubser --- Department of Agriculture, Republic of South Africa H.A. van de Venter --- , Republic of South AfricaDifferent germination options are prescribed by the International Seed Testing Association (ISTA) for the germination test on tomato seed. The purpose of this investigation was to compare three ISTA-approved germination substrata to establish a standardized procedure for uniform germination tests... -
Phosphorous sorption study of selected South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.C. Henry --- , MarieF. Smith --- ,Phosphorous isotherms for 21 selected soils from the Republic of South Africa were constructed and the Langmuir, Freundlich and Temkin sorption models were compared using regression analysis. Over a range of solution concentrations of 0.025 - 2.00 mg P I−1,... -
THE EFFECT OF TEMPERATURE ON SPECIFIC GROWTH RATE AND ACTIVATION ENERGY OF MICROCYSTIS AND SYNECHOCOCCUS ISOLATES RELEVANT TO THE ONSET OF NATURAL BLOOMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: G. H.J. Krüger --- Department of Botany, South Africa J.N. Eloff --- Department of Botany, South AfricaTo investigate the correlation between temperature and the appearance of Microcystis blooms in nature, the effect of temperature on the growth of four Microcystis izolates (two toxic and two non-toxic) was investigated. The lower temperature limit for Microcystis varied between... -
THE ENERGY BASE OF AQUATIC SYSTEMS IN SOUTH AFRICA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.R. Allanson --- Institute for Freshwater Studies, Department of Zoology, and Entomology, South AfricaThe energy base of reservoirs and lakes is examined. There is considerable variation in specific productivity and photosynthetic capacity depending on trophic condition and whether algae or suspensoids reduced transparency. While limnetic production is important in freshwater, it is not... -
UNDERSTANDING THE PHYSICAL STRUCTURE OF SOUTHERN AFRICA'S STANDING WATERS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.R. Allanson --- , South AfricaAn examination of the nature of the stratification in polymictic and monomictic Southern African reservoirs is presented. Wind stirring is the principal mode of heat transfer during spring heating. In high summer radiation from stable heated surface layers is responsible... -
FURTHER COMMENT ON THE RESPONSE OF EASTERN CAPE PROVINCE ESTUARIES TO VARIABLE FRESHWATER INFLOWS
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: B.R. Allanson --- , South Africa G. H.L. Read --- , South AfricaRiver flow patterns in the Kariega, Great Fish and Keiskamma estuaries, South Africa are examined to assess the impact variation in flow has upon the delivery of inorganic nutrients, total organic carbon, primary productivity and the heterotrophic components, bacteria and... -
An evaluation of diet quality in two desert ungulates exposed to hyper-arid conditions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SR Henley D WardDesert-dwelling ungulates are frequently exposed to plant communities of poor nutritional quality and low abundance. We assessed the diet quality of a large-bodied non-ruminant, the Asiatic wild ass (Equus hemionus) and that of a small-bodied ruminant, the dorcas gazelle (Gazella... -
Spring and autumn nitrogen fertiliser effects, with and without phosphorus, potassium and sulphur, on dairy pastures: Pasture nutritive value and mineral content
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: F.R. McKenzie --- Department of Natural Resources and Environment, Australia J.L. Jacobs --- Department of Natural Resources and Environment, Australia M. Ryan --- Department of Natural Resources and Environment, Australia G. Kearney --- Department of Natural Resources and Environment, AustraliaExperiments were conducted at three sites to examine effects of applying different nitrogen (N) fertilisers at 45 kg N ha−1, with and without phosphorus (P), potassium (K) and sulphur (S) on dairy pasture nutritive value and mineral content in autumn... -
Validating An Adapted Measure of Organisational Energy in the South African Context
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Rowenna Erin Cuff --- University of Pretoria, South Africa Nicolene Barkhuizen --- North-West University, South AfricaThis study validated an adapted measure of organisational energy, namely the Energy Scapes Profile (ESP), in the South African context, considering also possible differences in perceptions of organisational energy by the participants' demographics. Participants were a convenience sample of 304... -
Seasonal and diurnal stratification in two small Zimbabwean reservoirs
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Tamuka Nhiwatiwa BrianE MarshallSeasonal and diurnal stratification patterns were studied in two small Zimbabwe reservoirs. The water level of the upper reservoir fluctuated more than that of the lower one and theoretical water retention times were 9 days and 3.6 days, respectively. Rainfall... -
The Structure of Cellulose by Conformational Analysis.
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. Pizzi --- , N. Eaton --- ,Conformational analysis studies on the tertiary structure of cellobiose and methyl-β-cellobioside were carried out by using calculations of Van der Waals, H-bond, electrostatic and torsional energy interactions between the atoms and groups of the molecules. Energy maps in function of... -
The Structure of Cellulose by Conformational Analysis.
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. Pizzi --- Council for Scientific and Industrial Research, South Africa N. Eaton --- Council for Scientific and Industrial Research, South AfricaThe Meyer/Misch and related models were found to be the most energetically stable for the crystalline structure of cellulose I. The cellobioside structure is the monomer of cellulose I as structures having cellobiose as monomer have been proven to be... -
Effect of dietary protein to energy ratio on growth and nitrogenous waste production of cultured dusky kob Argyrosomus japonicus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LD Woolley --- Department of Ichthyology and Fisheries Science, South Africa CLW Jones --- Department of Ichthyology and Fisheries Science, South Africa PJ Britz --- Department of Ichthyology and Fisheries Science, South AfricaThe effect of dietary protein to energy ratio (P:E) on the growth of dusky kob Argyrosomus japoni-cus was investigated as a first step towards formulating a practical diet for this potential mariculture species in South Africa. The effects of dietary... -
Towards a Technology Policy for Renewable Energy Development in Africa: A Systems of Innovation Perspective
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ogundiran Soumonni --- Wits Business School, South AfricaThe objective of this paper is to use the systems of innovation (SI) perspective to describe how African countries might increase their rates of access to electricity, and by extension their capacity for broad-based industrialization, through renewable energy. The paper... -
A Rapid Solar Transition is not only Possible, it is Imperative!
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: David Schwartzman --- Department of Biology, USA Peter Schwartzman --- Department of Environmental Studies, USACatastrophic climate change (C3) is inevitable if carbon emissions to the atmosphere are not rapidly reduced and the now unsafe atmospheric level (400 ppm) CO2 (and rising) is not brought down by sequestration technologies to below 350 ppm. C3 prevention is possible... -
Solar Energy Industry Future Uncertainty – An Opportunity for New Markets and Refocusing
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Hattie Carwell --- , USAThe 2012 solar panel pricing war between manufacturers in China, Europe and the USA, accompanied by the sales market slowdown due to government subsidy cuts, has produced uncertainty in the future of the growth of the solar industry. A solar... -
On the Links between Sustainable Wellbeing and Electric Energy Consumption
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Marcel J. Castro-Sitiriche --- Department of Electrical and Computer Engineering, Puerto Rico Mandoye Ndoye --- Electrical and Computer Engineering Department, USAAccess to electric energy is one of the drivers of wellbeing and universal access to energy has recently been identified as an important goal in the international community. A data-driven analysis of electric energy consumption and subjective wellbeing indicators is... -
Habitual physical activity levels are positively correlated with CD4 counts in an HIV-positive South African population
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Kirsten Kinsey Joanne McVeigh Ingrid ChantlerIn order to assess the relationship between CD4 cell count, habitual physical activity levels and functional independence in a South African adult population positive for HIV, we administered a questionnaire concerning lifestyle and physical activity. Data collection took place at... -
Towards an abalone weaning diet: evaluation of agar-bound fishmeal and spirulina as dietary ingredients
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Ismail CLW Jones PJ Britz AJ EsterhuizenSurvival of post-settlement abalone when 'weaning' them from diatoms onto macroalgae/artificial feed remains unpredictable for farmers. It is hypothesised that spirulina algae, which are high in protein, may be a suitable feed ingredient for weaning abalone. Over a period of... -
Seasonal energy extraction patterns by agropastoral herds in semiarid south-eastern Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MM Nyangito --- Department of Land Resource Management and Agricultural Technology, Kenya NKR Musimba --- Department of Land Resource Management and Agricultural Technology, Kenya DM Nyariki --- Department of Land Resource Management and Agricultural Technology, KenyaPrimary energy extraction patterns by livestock under agropastoralism and ranching were investigated by the bite count method in semiarid south-eastern Kenya. Sward biomass for optimal energy intake by cattle was derived using intake-digestibility constraint curves and realised livestock productivity from... -
Renewable energy: the potential opportunities and obligations of plantation forestry
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: B Talbot PA AckermanGlobal demand for woody biomass in substituting fossil fuels does, and will increasingly, place significant pressure on timber plantations and question conventional management practices. Plantations are rationally laid out, located in areas of high productivity, typically have good infrastructure, and... -
Energy, chemicals and carbon: future options for the Eucalyptus value chain
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: S ChristieThis paper examines the current Eucalyptus value chain and the possible drivers that may impact upon it. The potential consequences of climate change on the growth and yield of Eucalyptus are discussed and the impact of the security of oil... -
Adopting latecomers' strategies for the development of renewable energy technology in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Maruf Sanni --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria Oluwatosin G Oladipo --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria Ibikunle O Ogundari --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria O Titilayo Aladesanmi --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, NigeriaThe overall objective of this paper is to develop strategies on how renewable energy technology could be used to abate climate change impacts in Africa. While assessing the potential impacts of climate change in Africa, the paper asserts that renewable... -
Looking for innovation system builders: A case of Solar Energy Foundation in Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kassahun Y. Kebede --- Graduate School of Technology Management, Japan Toshio Mitsufuji --- Graduate School of Technology Management, Japan Eugene K. Choi --- Graduate School of Technology Management, JapanThe global diffusion of renewable energy technology (RET) has been sluggish, and as a result governmental support and policy interventions have been required. In this paper, we empirically investigated an innovation system building practice of an organisation engaged in the... -
Europe's long history of extracting African renewable energy: Contexts for African scientists, technologists, innovators and policy-makers
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kate B. Showers --- Centre for World Environmental History, United KingdomHaving failed to identify local energy supplies compliant with Kyoto Protocol obligations, the EU turned to Africa in the 21st C. According to definition, the term ‘renewable energy’ source equally describes slaves, forests and rivers. Environmental history analysis demonstrates the... -
No effects of huddling on core body temperature in rock hyrax, Procavia capensis
Item type: Journal Article • Journal: African Zoology • Authors: C. T. Downs --- University of KwaZulu-Natal, South Africa K. Wimberger --- University of KwaZulu-Natal, South Africa A. L. Wilson --- University of KwaZulu-Natal, South AfricaHuddling is a behavioural energy conservation mechanism that is widely used by many small endotherms at low ambient temperatures. Huddling has many benefits, including decreasing the metabolic cost of maintaining body temperature (Tb), reducing the amount of heat lost to... -
Forage yield and quality response of annual ryegrass (Lolium multiflorum) to different water and nitrogen levels
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Amanuel B Abraha --- Department of Plant Production and Soil Science, South Africa Wayne F Truter --- Department of Plant Production and Soil Science, South Africa John G Annandale --- Department of Plant Production and Soil Science, South Africa Melake K Fessehazion --- Department of Plant Production and Soil Science, South AfricaWater and nitrogen shortages in annual ryegrass (Lolium multiflorum) production can be improved by using proper irrigation and nitrogen scheduling methods. The aim of this research was to analyse the effect of water and nitrogen application on dry matter production... -
Productivity and cost of whole‑tree harvesting without debarking in a Eucalyptus nitens plantation in Tasmania, Australia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Martin Strandgard --- University of the Sunshine Coast, Australia Damian Walsh --- University of the Sunshine Coast, Australia Rick Mitchell --- University of the Sunshine Coast, AustraliaThere is increasing interest worldwide in using tree harvesting biomass as an energy source. Bark retained on logs is commonly used as an energy source, but is generally removed from eucalypt logs during harvest. In order to evaluate the potential... -
Influence of energy saving on the quality of lighting services on selected hotels in Mpumalanga, Republic of South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: F. Machete --- Department of Environmental Health, South Africa C. Hongoro --- Health Research and Policy, South Africa G. Nhamo --- Institute of Corporate Citizenship, University of South Africa, South Africa K. Mearns --- Department of Environmental Sciences, South AfricaThis paper presents the results of an investigation undertaken on the influence of energy saving on the quality of lighting services on selected hotels in Mpumalanga, one of the nine provinces of the Republic of South Africa. This paper adopted... -
Integrated harvesting for conventional log and energy wood assortments: a case study in a pine plantation in Western Australia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Mohammad R Ghaffariyan --- Australian Forest Operations Research Alliance (AFORA), University of the Sunshine Coast, Australia Raffaele Spinelli --- CNR-IVALSA, Italy Natascia Magagnotti --- CNR-IVALSA, Italy Mark Brown --- Australian Forest Operations Research Alliance (AFORA), University of the Sunshine Coast, AustraliaBiomass or energy wood harvesting can be integrated with conventional log harvesting (saw log or pulpwood production) to allow more cost-effective energy wood supply. The efficiency of an integrated energy wood harvesting system was evaluated and compared with conventional log... -
Engine performance of biodiesel-biodiesel blends at varying engine speeds
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Godwin K. Ayetor --- Department of Automotive Engineering, Ghana Albert K. Sunnu --- Department of Mechanical Engineering, GhanaBiodiesel blends with petroleum diesel have long been experimented on and considered good alternatives to petroleum diesel. Most blends considered biodiesel percentages of 20 and less. This work considered blending B100 of separate biodiesel feedstocks to determine their influence on... -
Measuring and reporting on energy poverty: insights from West African countries
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Emmanuel W. Ramde --- Department of Mechanical Engineering, Ghana Patrick Nussbaumer --- United Nations Industrial Development Organization (UNIDO), Austria Morgan Bazilian --- United Nations Industrial Development Organization (UNIDO), AustriaA reliable and comprehensive energy information base is required to set targets, design policies and programmes, as well as to enable citizens to make informed choices. Adequate national capacity to track progress towards universal modern energy access represents an especially... -
Energy conversion efficiency of pressurised kerosene and pyramid-shaped clay-lined charcoal cooking stoves
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Haruna Mohammed Muye --- Mechanical Engineering Department, NigeriaThis paper evaluated fuel utilisation in cooking stoves. The cooking stoves used for the experiment were a pressurised kerosene stove and a pyramid-shaped clay-lined charcoal stove. Comparison tests were conducted and their results analysed to determine the efficiency of the... -
Effect of energy sources on the milk production and reproduction of lactating Holstein cows
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: B. A. Useni --- Department of Animal Sciences, South Africa C. J. C. Muller --- Western Cape Department of Agriculture, South Africa C. W. Cruywagen --- Department of Animal Sciences, South AfricaThe objective of the study was to evaluate the effect of energy sources on milk production and reproduction of dairy cows on a pasture-based feeding system. Following parturition, 201 Holstein cows from the Elsenburg herd were fed ad libitum cultivated... -
Design basics of a small hydro turbine plant for capacity building in sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Williams S. Ebhota --- Department of Mechanical Engineering, South Africa Freddie Inambao --- Department of Mechanical Engineering, South AfricaThis paper presents a simplified design considerations for a propeller hydro-turbine, including tabulated relevant mathematical expressions of operating parameters. In the design calculation, a 2.5 m head and 0.183 m3/s flow rate were used as river data for power of... -
Thermal energy conservation strategy: A case of a modified local charcoal stove utilisation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Alex Okibe Edeoja --- Department of Mechanical Engineering, Nigeria Andrew C. Eloka-Eboka --- Discipline of Mechanical Engineering, South AfricaThe proliferation and use of charcoal stoves is on the increase even in urban locations in Africa despite the environmental hazard associated with charcoal production. The rising cost of fossil fuel, the smokeless nature of charcoal combustion and probably inexistent... -
Accuracy of reporting food energy intake: influence of ethnicity and body weight status in South African women
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Zj Mchiza --- Knowledge Systems, Nutrition Unit, South Africa Jh Goedecke --- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Dept of Human Biology, South Africa Ev Lambert --- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Dept of Human Biology, South AfricaThe current study sought to identify characteristics that may be associated with the misreporting of food energy intake (EI) in urban South African women. A total of 198 women (61 black, 76 of mixed ancestry, 61 white) completed a quantified... -
The female athlete triad in student track and field athletes
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Jg Robbeson --- Centre of Excellence for Nutrition, L Havemann-Nel --- Centre of Excellence for Nutrition, Hh Wright --- Centre of Excellence for Nutrition,Objectives: To explore the female athlete triad components in university track and field athletes, as well as calculate estimated energy availability. -
A desire for weight loss in season increases disordered eating behaviour risk and energy deficiency in athletes
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Hh Wright --- School of Health and Sports Sciences, University of the Sunshine Coast, Maroochydore, Queensland, Australia Centre of Excellence for Nutrition, South Africa R. Ford --- Centre of Excellence for Nutrition, South Africa Cr Botha --- Centre of Excellence for Nutrition, South AfricaObjective: The objective was to explore eating behaviour, body image and energy status in female university team sport athletes. -
Nutritional quality of a ready-to-use food, and its acceptability to healthy and HIV-infected children receiving antiretroviral treatment
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Nl Wiles --- Dietetics and Human Nutrition, Pietermartizburg Zn Mahlangu --- Dietetics and Human Nutrition, Pietermartizburg M. Siwela --- Dietetics and Human Nutrition, Pietermartizburg Fj Veldman --- Dietetics and Human Nutrition, PietermartizburgObjectives: The objectives of this study were to determine the nutritional quality of a ready-to-use food (RUF), and its acceptability to children who were “healthy” and to those who were human-immunodeficiency virus (HIV)-infected and receiving antiretroviral therapy (ART). -
A proportional integral synthesis for a variable speed wind energy conversion system using a permanent magnet synchronous generator
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Francis-Daniel Menga --- Department of Renewable Energy, Cameroon Noël Djongyang --- Department of Renewable Energy, Cameroon Danwé Raïdandi --- Department of Renewable Energy, Cameroon Réné Tchinda --- LISIE, CameroonA wind energy conversion system applied to battery charge is proposed in this paper. A permanent magnet synchronous generator (PMSG) is used as a variable speed generator in the proposed system. In order to extract the maximum power, the generator... -
Electricity insufficiency in Africa: A product of inadequate manufacturing capacity
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Williams S. Ebhota --- Discipline of Mechanical Engineering, South Africa Freddie L. Inambao --- Discipline of Mechanical Engineering, South AfricaEnergy availability is fundamental and crucial for human survival and for national economic development. Energy consumption per capita of a country or region is a measure of quality of life and industrialisation of a country or region. This to certain... -
The quantity and quality of feed available to indigenous chickens under the scavenging system in semi-arid Eastern Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: S. M. Nzioka --- Kenya Agricultural and Livestock Research Organization, Kenya E. O. Mungube --- Kenya Agricultural and Livestock Research Organization, Kenya M. D. Mwangi --- Kenya Agricultural and Livestock Research Organization, Kenya L. Muhammed --- Kenya Agricultural and Livestock Research Organization, Kenya J. M. Wambua --- Kenya Agricultural and Livestock Research Organization, KenyaFree range indigenous chickens suffer from low productivity due to inadequate quantity and quality of feed, high predation and high mortality rates. The aim of the study was to establish the nutritional gaps in the free range chickens’ diets. A... -
Wind energy potential and economic evaluation of WPS using WECSs in three selected locations of Northern Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Shiva Prashanth Kumar Kodicherla --- Department of Civil Engineering, College of Engineering & Technology, Ethiopia Satyanarayana Gaddada --- Department of Electrical and Computer Engineering, College of Engineering & Technology, Ethiopia Nagaraju Shaik --- Department of Construction Management, College of Engineering & Technology, EthiopiaThis paper analyzes wind energy potential and economic evaluation of water pumping system (WPS) employed by various wind energy conversion systems (WECSs). The wind speed data gathered from three different locations of Northern Ethiopia are analyzed using the Weibull probability... -
Determination of energy efficiency for water heating in eight South African hotels
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Fannie Machete --- Waste for Development, Natural Resources and the Environment, South Africa Oyewale Mayowa Morakinyo --- Department of Environmental Health Sciences, Faculty of Public Health, NigeriaThis study presents a characterization framework for energy efficient hotels. It builds on existing frameworks of energy efficiency and the adopted characterization framework advances from the input-output framework. The theoretical framework was developed through an in-depth literature analysis. In contrast... -
Optimization of cooking energy mix, an alternative strategy to reduce deforestation: An example of households and restaurants in the Bauchi Metropolis, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Aondoyila Kuhe --- Department of Mechanical Engineering, Nigeria Danladi Yusufu Bisu --- Department of Mechanical Engineering Technology, Nigeria Humphrey Aondover Iortyer --- Department of Mechanical Engineering, NigeriaCooking is a major energy consuming activity in households and restaurants. Over dependence on fuel wood and charcoal for cooking has been identified as a major cause of deforestation, a major environmental problem in Africa and Asia. This paper presents... -
Outward foreign direct investment from South Africa’s energy sector and the transfer of environmentally sound technologies to Uganda’s energy sector
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Albert Edgar Manyuchi --- Department of Political Sciences, South AfricaFollowing the end of apartheid in 1994, outward foreign direct investment (OFDI) from South Africa has been on the increase. However, the content of South African OFDI has remained an understudied topic. This article explores whether intra-regional flows of FDI... -
Public perceptions about renewable energy technologies in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Rosemary N. Wojuola --- School of Education, South Africa Busisiwe P. Alant --- School of Education, South AfricaGlobally, there is a focus on generating energy from renewable energy sources in order to ensure sustainability. However, experience has shown that although the public generally accepts renewable energy technology (RET), there is also opposition to its implementation. Renewable energy... -
Generating optimum solar output energy with three-dimensional photovoltaic system – the effect of solar radiation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olufunmilayo Alice Mafimidiwo --- School of Engineering, South Africa Akshay Kumar Saha --- School of Engineering, South AfricaIn order to optimize the solar energy generated from a photovoltaic solar panel, adequate utilization of the global irradiation incident on the photovoltaic panel is necessary. Solar irradiation received on the surface of any material on the earth could be... -
The effect of technological innovation on production-based energy and CO2 emission productivity: Evidence from BRICS countries
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Swarup Santra --- The Department of Economics, Satyawati College, IndiaCollectively, Brazil, the Russian Federation, India, China and South Africa (known as BRICS) are emerging as an economic superpower. In 2014, BRICS countries accounted for approximately 40% of the total world population, 30% of the total earth surface and almost... -
Exploring the Jawaharlal Nehru National Solar Mission (JNNSM): Impact on innovation ecosystem in India
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Amitkumar Singh Akoijam --- PhD Scholar, Centre for Studies in Science Policy (CSSP), School of Social Science, India V. V. Krishna --- Professorial Fellow, Faculty of Arts and Social Sciences, AustraliaTo make India one of the leaders in solar energy generation and to promote ecologically sustainable growth that addresses the nation’s energy security challenge is one of the promising goals of the Jawaharlal Nehru National Solar Mission (JNNSM) or National... -
Appraisal of geothermal resources and use in Cameroon
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Janvier Domra Kana --- Department of Petroleum and Gas Exploration, Cameroon Noël Djongyang --- Department of Renewable Energy, Cameroon Danwé Raïdandi --- Department of Materials Processing, Architecture and Habitat, Cameroon Brandan Tito Ramadhan --- Geophysics Laboratory, Department of Physics, Faculty of Science and Mathematics, IndonesiaThis paper deals with resources and opportunities of direct and indirect use of geothermal energy in Cameroon. Currently, no serious exploration and utilization of this resource exists. The primary form of utilization of geothermal energy is mainly condensation steam for... -
Modelling and performance of an automated small hybrid plant
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Samuel Ilupeju --- Discipline of Mechanical Engineering, Durban, South Africa Freddie Inambao --- Discipline of Mechanical Engineering, Durban, South Africa Yetunde Ilupeju --- Discipline of Mechanical Engineering, Durban, South Africa Taha Selim Ustun --- Electrical Engineering, Carnegie Mellon University, USASmall rivers that can generate useful quantities of electricity are freely and proportionally distributed in Africa. Thousands of potential sites are available in South Africa, capable of generating hundreds of megawatts. Small hydropower generation is not a new approach in... -
Feasibility of electricity generation using WECS in the selected locations of Tigray region (Ethiopia)
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Shiva Prashanth Kumar Kodicherla --- Department of Civil Engineering, College of Engineering & Technology, Ethiopia Satyanarayana Gaddada --- Department of Electrical and Computer Engineering, College of Engineering & Technology, EthiopiaThis paper presents the feasibility of electricity generation using WECS in the selected locations of Tigray region in Ethiopia. Weibull parameters were obtained using the energy pattern factor method (EPFM). A linear agreement was observed between mean wind speed and... -
Preliminary trials of the BioBaler working in Brazilian eucalypt plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Saulo PS Guerra --- College of Agricultural Sciences, Brazil Guilherme Oguri --- College of Agricultural Sciences, Brazil Marcelo S Denadai --- College of Agricultural Sciences, Brazil Maura ST Esperancini --- College of Agricultural Sciences, Brazil Raffaele Spinelli --- Consiglio Nazionale delle Ricerche, ItalyThe increasing demand for renewable energy feedstock has raised interest in growing eucalypts for fuel wood production, which is achieved by establishing very dense plantations cut every 18–24 months. The high moisture content of fresh Eucalyptus may handicap cut-and-chip operations,... -
Energy drinks consumption among football players in Lagos, Nigeria
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Foluke Adenike Olatona --- Department of Community Health and Primary Care, College of Medicine, Nigeria Ijeoma Olumide Aderibigbe --- Department of Community Health and Primary Care, College of Medicine, Nigeria Sunday Adedeji Aderibigbe --- Department of Epidemiology and Community Health, Nigeria Temitope ‘Wunmi Ladi-Akinyemi --- Department of Community Health and Primary Care, College of Medicine, NigeriaObjectives: This study assessed the prevalence, frequency and reasons for the consumption of energy drinks among members of registered football clubs in Lagos, Nigeria. A descriptive cross-sectional study design was employed and the study setting was Onikan Stadium Lagos, Lagos... -
Analysing the diffusion and adoption of renewable energy technologies in Africa: The functions of innovation systems perspective
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Aschalew Demeke Tigabu --- African Centre for Technology Studies (ACTS), KenyaRenewable energy technologies have increasingly been promoted to address energy poverty and environmental sustainability challenges in Africa. Yet, their diffusion and uptake remain marginal. The focus of renewable energy technology diffusion research in Africa has largely been on identifying technological,... -
Descriptive analysis of building indigenous low-carbon innovation capability in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Yusuf Opeyemi Akinwale --- School of Economics, Faculty of Economic Sciences and IT, South AfricaThe issue of a low-carbon energy system is contentious especially in developing countries as the world is transiting from a fossil fuel based economy to a low-carbon economy. A new development path of low-carbon energy is being sought so as... -
Socio-economic and environmental analysis of wind power projects as viable renewable energy resources in Kenya
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Victor Ongoma --- Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), People’s Republic of ChinaThe demand for power in Kenya is on the increase with the ongoing growth of the country’s economy. There is a need for the country to balance energy efficiency, sustainability and low-carbon technologies. This entails drafting and implementing policies and... -
Using deliberative foresight to envision a neo-carbon energy innovation ecosystem – a case study of Kenya
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Joni Karjalainen --- Finland Futures Research Centre (FFRC), Finland Sirkka Heinonen --- Finland Futures Research Centre (FFRC), FinlandForesight is a pragmatic futures studies approach as structured debate about future-related topics. Deliberative foresight addresses stakeholders affected by specific futures. This paper goes beyond a low-carbon strategy to present the potential of futures based on renewable energy. In the... -
Applications of small-scale, stand-alone wind energy conversion systems in rural Cross River State, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Fidelis I. Abam --- Energy, Exergy and Environment Research Group (EEERG), Mechanical Engineering Department, Nigeria Olayinka S. Ohunakin --- The Energy and Environment Research Group (TEERG), Department of Mechanical Engineering, NigeriaThe study presents the wind energy potential (WEP) for six locations in Cross River State, Nigeria. The objective of the study was to assess the WEP of the selected sites for electricity generation, using small size wind energy conversion systems... -
Mapping dynamics of low-carbon energy innovation for small hydropower technology in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Maruf Sanni --- National Centre for Technology Development, Federal Ministry of Science and Technology, NigeriaThe urgent need for clean innovative energy systems is widely recognized amidst increasing concerns over energy insecurity, climate change and other environmental impacts of a carbon-constrained economy. Several renewable energy technologies such as small hydropower (SHP) are poised to play... -
Photovoltaic performance prediction in Northern Nigeria using generated typical meteorological year dataset
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olayinka S. Ohunakin --- The Energy and Environment Research Group (TEERG), Mechanical Engineering Department, Nigeria Muyiwa S. Adaramola --- Faculty of Environmental Sciences and Natural Resource Management, Norway Olanrewaju M. Oyewola --- Department of Mechanical Engineering, Nigeria Richard O. Fagbenle --- Department of Mechanical Engineering, Nigeria Damola S. Adelekan --- The Energy and Environment Research Group (TEERG), Mechanical Engineering Department, Nigeria Jatinder Gill --- Ph.D Research Scholar, IKGPTU, Kapurthala, India Fidelis I. Abam --- Energy, exergy and environment research group (EEERG), Department of Mechanical Engineering, NigeriaRelevant meteorological files are needed by simulation software to assess the energy performances of buildings or efficiency of renewable energy systems. This paper adopts the Sandia method to generate typical meteorological year (TMY), using a 35-year hourly measured meteorological dataset... -
Building low-carbon energy innovation systems in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Radhika Perrot --- Independent researcher, South Africa Maruf Sanni --- National Centre for Technology Management, NigeriaThe objective of this special issue is to bring together research on low-carbon innovation in the African context. The aim is to assess and compare various cases of low-carbon energy development in Africa in an effort to understand the underlying... -
Development of energy benchmarking protocol for commercial banks, Lagos state, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: T. O. Akinbulire --- Department of Electrical/Electronic Engineering, Nigeria P. O. Oluseyi --- Department of Electrical/Electronic Engineering, Nigeria O. M. Babatunde --- Department of Electrical/Electronic Engineering, Nigeria A. E. Ayegbajeje --- Daystar Power Solutions, NigeriaEnergy consumption is a central factor taken into consideration as far as management decisions are concerned in any firm and the same goes for the banking industry. More importantly is the extent to which firms consume energy efficiently. In the... -
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... -
The economic cost of unreliable grid power in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Samuel Olowosejeje --- School of Engineering, Nigeria Paul Leahy --- School of Engineering, Republic of Ireland Alan Morrison --- Department of Electrical and Electronic Engineering, School of Engineering, Republic of IrelandThe ever-increasing demand for electrical power in Nigeria, coupled with a limited supply, have restricted the nation's socioeconomic development. The country’s policymakers, aware of this, have formulated and enacted energy development policies in recent years targeted at diversifying the current... -
A mathematical formulation of the joint economic and emission dispatch problem of a renewable energy-assisted prosumer microgrid
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Uyikumhe Damisa --- Department of Electrical and Electronic Engineering Science, South Africa Nnamdi I. Nwulu --- Department of Electrical and Electronic Engineering Science, South Africa Yanxia Sun --- Department of Electrical and Electronic Engineering Science, South AfricaOperational planning of prosumer microgrids with solar and wind energy sources is quite a complex task considering the intermittency of these sources and energy import/export from prosumers. Reserve capacities which can be reliably provided by dispatchable sources like conventional generators... -
Factors that influence firewood use among electrified Bapedi households of Senwabarwana Villages, South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Khomotso Semenya --- College of Agriculture and Environmental Sciences, Republic of South Africa Fannie Machete --- College of Agriculture and Environmental Sciences, Republic of South AfricaThis paper presents the factors that influence firewood use among electrified Bapedi households in Senwabarwana Villages. The study follows explanatory and exploratory methods of data analysis, through survey (structured interviews) and meta-analysis. In-depth content analysis was followed to establish trends... -
Techno-economic viability of off-grid standalone PV-powered LED street lighting system in Lagos, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: M. O. Babatunde --- Department of Electrical/Electronic Engineering, Nigeria T. O. Akinbulire --- Department of Electrical/Electronic Engineering, Nigeria P. O. Oluseyi --- Department of Electrical/Electronic Engineering, Nigeria M. U. Emezirinwune --- Department of Electrical/Electronic Engineering, NigeriaThe majority of the street lighting systems in Nigeria are predominantly composed of inefficient lighting fixtures powered either by the grid or diesel generators. Due to the epileptic nature of the grid and the fluctuations in diesel fuel pump prices,... -
Geographical and temporal variation in the diet of Bank Cormorants Phalacrocorax neglectus in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: BM Dyer --- Department of Environment, South Africa J Cooper --- Department of Botany and Zoology, South Africa RJM Crawford --- Department of Environment, South Africa RB Sherley --- Environment and Sustainability Institute, University of Exeter, United Kingdom S Somhlaba --- Department of Environment, South Africa A Cockcroft --- Department of Environment, South Africa L Upfold --- Department of Environment, South Africa AB Makhado --- Department of Environment, South AfricaThe Bank Cormorant Phalacrocorax neglectus is endemic to the Benguela upwelling ecosystem off southwest Africa and is classified as Endangered owing to a recent large reduction in its number. It is thought that food scarcity, including a decreased abundance of... -
Using radar technology to assess visual monitoring accuracy of Cape Vulture movements
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Frowin K Becker --- Department of Conservation Ecology and Entomology, South Africa Rhonda L Millikin --- EchoTrack Inc., Canada Alison J Leslie --- Department of Conservation Ecology and Entomology, South AfricaSouth Africa’s expanding wind energy industry is providing much needed alleviation from an ongoing energy crisis. Its development, however, does bear environmental repercussions, which most notably include its impact on birds. Collision risks, habitat loss, and barrier effects are amongst... -
Optimization of the production and storage of cold in a mechanical compression solar refrigerator
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Adingra Paul Arsène Kouassi --- Laboratoire d’Energie Solaire, Unité de Formation et de Recherche des Sciences des Structures de la Matière et Technologie, Côte d’Ivoire Siaka Touré --- Laboratoire d’Energie Solaire, Unité de Formation et de Recherche des Sciences des Structures de la Matière et Technologie, Côte d’Ivoire Wanignon Ferdinand Fassinou --- Laboratoire d’Energie Solaire, Unité de Formation et de Recherche des Sciences des Structures de la Matière et Technologie, Côte d’IvoireDesign, optimization and realization of high-performance photovoltaic systems are topical issues. Especially in photovoltaic solar refrigeration machines, the cost and the lifetime of electrochemical batteries limit the development of these systems in places well served by solar radiation. The objective... -
Fuelwood energy characteristics and biomass equations of the dominant species of northern Patagonian shrublands (Argentina)
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Matías G Goldenberg --- , Argentina Yamila A Cardoso --- , Argentina Facundo J Oddi --- , Argentina Lucas A Garibaldi --- , ArgentinaAlthough shrublands can be highly abundant, their bioenergy potential has barely been addressed. This is the case in northern Patagonian shrublands, where there is a lack of knowledge regarding biomass quantity and quality. The objective of this study was to... -
On a collision course? The large diversity of birds killed by wind turbines in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: V Perold --- , South Africa S Ralston-Paton --- , South Africa P Ryan --- , South AfricaWind energy is a clean, renewable alternative to fossil fuel-derived energy sources, but many birds are at risk from collisions with wind turbines. We summarise the diversity of birds killed by turbine collisions at 20 wind energy facilities (WEFs) across... -
Clean energy transition in a developing society: Perspectives on the socioeconomic determinants of Solar Home Systems adoption among urban households in southeastern Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Edlyne Eze Anugwom --- , Nigeria Kenechukwu Nwakego Anugwom --- , Nigeria Oliver Ifeanyi Eya --- , NigeriaThis study identifies factors that constrain the adoption of clean energy sources by urban households in southeastern Nigeria, using the Solar Home Systems (SHS) as a case study. It is premised on the assumption that adoption of innovation is affected... -
Assessment of biomass energy use pattern and biogas technology domestication programme in Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Getachew Sime --- , Ethiopia Girma Tilahun --- , Ethiopia Mulugeta Kebede --- , EthiopiaBiogas is an energy-efficient and environmentally beneficial technology used as an alternative to biomass energy sources. The objective of this study was to evaluate the traditional biomass energy system in Ethiopia and the National Biogas Program of Ethiopia (NBPE) as... -
Eco-friendly environment in Cameroon: Does an increase in fossil fuel energy consumption influence economic growth?
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Thales Pacific Yapatake Kossele --- , Central African Republic Manuella Ndjakwa Tonga --- , Cameroon Magalie Gabriella Ngaba Mbai-Akem --- , Central African RepublicThis study examines the relationship between fossil fuel consumption and economic growth in ensuring energy conservation steps to reduce reliance on fossil fuels for a friendly environment in Cameroon covering the period of 1996–2013. The Auto-Regressive Distributed Lag (ARDL) bounds... -
The impact of cell selection on the energy efficiency of heterogeneous networks
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Michael Oyakhilome --- , Finland Kazeem B. Adedeji --- , South AfricaThe growth of the information, communication and telecommunication (ICT) industry is on the ascendancy. The proliferation of mobile devices and other web-based applications has compelled ICT industries to deploy more resource towards capacity expansion and improved quality of service. This... -
Solar drying research of medicinal and aromatic plants: An African experience with assessment of the economic and environmental impact.
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Macmanus Chinenye Ndukwu --- , Nigeria Merlin Simo-Tagne --- , France Lyes Bennamoun --- , CanadaPerformances of solar dryers for the drying of medicinal and aromatic plants (MAP) in Africa were reviewed. Policy formulation indicators, including the economic and the environmental impact analysis that was lacking in almost all research, were presented in this study... -
Characterising the seasonal cycle of wind forcing, surface circulation and temperature around the sub-Antarctic Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Toolsee --- , South Africa T Lamont --- , South Africa M Rouault --- , South Africa I Ansorge --- , South AfricaLocated between the sub-Antarctic Front and the Antarctic Polar Front, the Prince Edward Islands (PEIs) provide an essential breeding ground for top predators and are an ideal location to investigate disturbances linked to climate change. This study provides the first... -
Cross-shelf movement of Chrysaora fulgida (Scyphozoa; Discomedusae) off Namibia inferred from stable isotopes (δ15N and δ13C)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H Skrypzeck --- , South Africa CD van der Lingen --- , South Africa MJ Gibbons --- , South AfricaLarge and small specimens of two species of metagenic Scyphozoa (true jellyfishes) can be found in nearshore waters off central Namibia throughout the year. Whereas populations of Chrysaora africana are largely restricted to inshore waters, C. fulgida occurs across the... -
Wind and solar power deployment in India: Economic aspects and policy implications
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Alok Das --- , India Hardik K. Jani --- , India Garlapati Nagababu --- , India Surendra Singh Kachhwaha --- , IndiaEconomic assets play a key role in the growth of renewable power projects and depend on financial scenarios and policy structures offered by government policies. The focus of the study is to assess the impact of the existing economic scenarios... -
Body composition of HIV-positive candidates for and recipients of a kidney transplant: comparative analysis between DEXA and anthropometric indices
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: CJ Martin --- , South Africa E Muller --- , South Africa D Labadarios --- , South Africa FJ Veldman --- , South Africa SM Kassier --- , South AfricaObjective: To determine body composition (BC) and the correlation, if any, between indices measured by anthropometry and dual-energy X-ray absorptiometry (DEXA). -
Energy and water utilization in smallholder dairy farming: A milk bulking group case study in Malawi
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Thomas Nyanda Reuben --- , Malawi Grivin Chipula --- , Malawi Thawani Mpatama Sanjika --- , Malawi Darwin Dodoma Singa --- , MalawiMalawi’s dairy farming is dominated by smallholder farmers living in rural areas. The farmers practise hand-milking and have an unreliable supply of clean water. Consequently, low milk yields of generally low quality are realized. Machines can safely be used for... -
Resilience to shocks and food insecurity: Determinants, and the impact of smallholder jatropha curcas cultivation in Southern Malawi
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Owen Y. Chamdimba --- , South Africa Gerald F. Ortmann --- , South Africa Edilegnaw Wale --- , South AfricaThis paper studied household resilience to food insecurity, its determinants, and the impact of shocks on welfare in Southern Malawi. The resilience concept is evolving. A crucial issue in scholarly and policy space is how it is measured. This paper... -
Computational study of a novel combined cookstove for developing countries
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bisrat Yilma Mekonnen --- , EthiopiaThis paper presents a computational study of a novel biomass-solar combined cookstove for developing countries. A computational fluid dynamics (CFD) study was carried out to understand how the proposed cookstoves perform during combustion. The technique was successfully used for predicting... -
Nestling diet of the Algerian Nuthatch Sitta ledanti, an endemic threatened bird in Babors’ Kabylia region (north-eastern Algeria)
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mourad Zemouri --- , Algeria Lydia Asloune --- , Algeria Aida Adrar --- , Algeria Abdelouhab Bouchareb --- , Algeria Abdelazize Franck Bougaham --- , AlgeriaThe Algerian Nuthatch is an endemic and protected bird species in Algeria, and its different habitats are threatened by fires and others human actions; the species is therefore considered ‘Endangered’. A faecal samples analysis of the species’ nestlings was done... -
Nutritional quality of Calobota sericea fodders. A preliminary assessment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois L Müller --- , South Africa Clement F Cupido --- , South Africa M Igshaan Samuels --- , South AfricaThis study aimed to provide preliminary information regarding the nutritional quality of Calobota sericea, a preferred perennial legume forage species from the water-limited rangelands of South Africa. Calobota sericea plant samples were collected from the Namaqualand rangelands in the wet... -
Sustainable entrepreneurship development in the renewable energy sector: Insights from Gujarat, India
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Stuti Haldar --- , IndiaSustainable development lies at the heart of sustainable entrepreneurship. In the context of this view, the current paper explores the linkages among sustainable development, entrepreneurship, and innovation. Since Gujarat ranks among the five top Indian states in terms of renewable... -
Clean versus dirty energy: Empirical evidence from fuel adoption and usage by households in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Alhassan Abdulwakeel Karakara --- , Ghana Evans S. Osabuohien --- , NigeriaThere are few studies on the determinants of energy consumption of households in Africa, particularly in Ghana. Thus, this study identifies the drivers of households’ fuel consumption for domestic purposes and examines two fuel categories (‘clean’ fuels versus ‘dirty’ fuels)... -
Adoption of innovation technology in the face of efficient energy use: A case of improved biomass stoves in Kwara State, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ibukun James Olaoye --- , Nigeria Morolake Bolaji --- , Nigeria Adeola Oreoluwa Oloyede --- , NigeriaGiven that locally developed innovation technology can foster sustainable growth and development, this study assessed the factors that underpinned the choice of improved biomass stoves among rural households in Kwara South, Nigeria. The study involved the use of primary and... -
Achieving energy security in Africa: prospects of nuclear energy development in South Africa and Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Eldar Salakhetdinov --- , South Africa Oboshi Agyeno --- , South AfricaAfrica has rich energy resources but continues to remain an energy poor continent. The industrialization potential of the continent and its rapidly growing population have caused a sharp increase in demand for electricity. South Africa and Nigeria are the biggest... -
Energy properties of Eucalyptus benthamii wood based on tree age and region in Guarapuava, Paraná state, Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Cristiane Carla Benin --- , Brazil Danielle de Moraes Lúcio --- , Brazil Luciano Farinha Watzlawick --- , Brazil Vanderlei Aparecido de Lima --- , BrazilThis study aimed to evaluate the properties of Eucalyptus benthamii wood for bioenergy purposes. Trees were sampled in five diametric classes and used to evaluate properties of the wood according to three ages (5, 6 and 7 years) in three... -
Exploring the perception of Nigerians towards nuclear power generation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Daniel R. E. Ewim --- , South Africa Stephen S. Oyewobi --- , Nigeria Michael O. Dioha --- , India Chibuike E. Daraojimba --- , South Africa Suzzie O. Oyakhire --- , Nigeria Zhongjie Huan --- , South AfricaTo decarbonize the Nigerian power sector and ensure a reliable electricity supply, nuclear power will play a key role. However, public acceptance must be considered for the successful introduction of nuclear power. This study examines the perceptions of Nigerians towards... -
Bioenergy emerging paradigm: Collaborative networks and determinants in the upgrading process of technological frontiers
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Carolina da Silveira Bueno --- University of Campinas, Brazil Fábio Kenji Masago --- University of Campinas, Brazil José Maria Ferreira Jardim da Silveira --- University of Campinas, Brazil Bruna de Souza Moraes --- University of Campinas, Brazil Leonardo Brantes Bacellar Mendes --- , Brazil Ivette Raymunda Luna --- University of Campinas, Brazil Telma Teixeira Franco --- School of Chemical Engineering (FEQ), University of Campinas (UNICAMP), Campinas, SP, BrazilThis paper examines the collaboration dynamic among areas of knowledge and countries from 1975 to 2017 within the bioenergy field and from a complex network approach, as a driver for the evolution of technological frontiers and emerging paradigms, seeking opportunities... -
ECOWAS and the prevalence of energy-inefficient lighting technologies: Any hope of achieving SDG 7.3?
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Edwin Albert Umoh --- , Nigeria Yahaya Muhammad Bande --- , Nigeria Omokhafe James Tola --- , NigeriaA region-adaptive hierarchical framework for realizing Sustainable Development Goal 7.3 is proposed in this paper, using Nigeria as a case study for strategy adoption and adaptation. In 2013, the Economic Community of West African States (ECOWAS) rolled out strategic plans... -
Evaluating carbohydrate fractions and degradation kinetics of maize silages on different storage periods and the estimates of milk production
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Stela Näetzold Pereira --- , Brazil Julio Viégas --- , Brazil Larissa Luísa Schumacher --- , Brazil Tiago João Tonin --- , Brazil Leticia Lopes da Costa --- , Brazil Ana Betine Beutinger Bender --- , Brazil Micaela Jungbeck --- , BrazilThe objective of this study was to evaluate the effect of maize (Zea mays L.) carbohydrate contents and the estimates of milk production on different storage periods. The experimental design was completely randomised, with four treatments (storage time), each replicated... -
Patients in public hospitals received insufficient food to meet daily protein and energy requirements: Cape Town Metropole, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Marieke Theron --- University of Cape Town, South Africa Siobhan O’Halloran --- Institute of Basic Medical Sciences, University of Oslo, Norway -
Technical feasibility of producing binder-free water hyacinth briquettes for domestic energy use
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Thawani Sanjika* --- , Malawi Grivin Chipula --- , MalawiProduction of biomass briquettes of good strength and combustion characteristics usually requires the addition of a binder material to the feedstock. This study was aimed at developing a methodology for producing briquettes from water hyacinth at low compression pressures without... -
Differences in resting metabolic rates of two southern African tortoises: Psammobates oculiferus and Geochelone pardalis
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Michael Scantlebury --- University of Pretoria, South Africa Peter Minting --- Ayrshire Rivers Trust, UKEnergy metabolism varies considerably between different groups of endotherms, yet there is little or no reported variation among extant groups of reptiles. We measured lower resting metabolic rates (RMRs) in Kalahari tent tortoises (Psammobates oculiferus) than in sympatric Leopard tortoises... -
Assimilation efficiency and gut passage time in an African elapid snake, Hemachatus haemachatus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: GrahamJ. Alexander --- University of the Witwatersrand, South Africa ShirleyA. Hanrahan --- University of the Witwatersrand, South Africa Duncan Mitchell --- University of the Witwatersrand, South AfricaWe measured apparent assimilation efficiency (AAE) and gut passage time in the African elapid snake Hemachatus haemachatus under laboratory conditions. AAE was dependent on food type, being 89.8% when snakes were fed frogs and 82.8% when fed mice. Differences in... -
The effects of temperature on oxygen consumption in the lizard Pseudocordylus melanotus from Suikerbosrand Nature Reserve
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Suzanne McConnachie --- , , South AfricaIn reptiles, metabolic rate (MR) is affected by many different factors, including temperature, sex, body size and digestive state. Standard MR was measured for the lizard Pseudocordylus melanotus over a range of temperatures (20, 22, 25, 30 and 32°C). I... -
Sustainability of energy transition on output growth and carbon emission abatement in sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ikechukwu Sebastine Asogwa --- Michael Okpara University of Agriculture, Nigeria Charles Nnamdi Anumudu --- Michael Okpara University of Agriculture, NigeriaThis study examined the effects of renewable energy use on the output growth convergence, as well as the impacts of renewable energy use for an alternative to carbon emission (CO2) abatement in sub-Saharan Africa (SSA). The dual purpose followed the... -
Initial boundary value problem for a damped wave equation with logarithmic nonlinearity
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Haixia Li --- Changchun Normal University, P.R. ChinaIn this paper, a damped semilinear wave equation with logarithmic non-linearity is considered. Finite time blow-up criteria are established for solutions with both lower and higher initial energy, and an upper bound for the blow-up time is derived for each... -
Knowledge, awareness, and perception of senior high school learners towards nuclear energy: A South African case study
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Daniel Raphael Ejike Ewim --- Durban University of Technology, South Africa Yasthil Nundlal --- Durban University of Technology, South Africa Keenan Govender --- Durban University of Technology, South Africa Nokubonga Lungile Nzuke --- Durban University of Technology, South Africa Mfanafuthi Vukani Mbatha --- Durban University of Technology, South Africa Nangamso Gwexa --- Durban University of Technology, South Africa Kelsi Naidoo --- Durban University of Technology, South Africa Opeyeolu T. Laseinde --- University of Johannesburg, South Africa Sogo Mayokun Abolarin --- University of the Free State, South AfricaThis study investigated senior South African high school students’ levels of knowledge, perception, attitude, and awareness toward nuclear energy using paper-based, semi-structured questionnaires and digital data collection instruments through online Google forms. The sample consisted of 100 high school students... -
Agreement between measured energy expenditure and predictive energy equations in paediatric oncology
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: I Kellerman --- Stellenbosch University, South Africa M Kruger --- Stellenbosch University, South Africa J Schoeman --- Stellenbosch University, South Africa R Blaauw --- Stellenbosch University, South Africa -
The impact of conventional energy markets on connectedness dynamics among eco-friendly assets
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Oktay Özkan --- Tokat Gaziosmanpasa University, Turkiye Asil Azimli --- Cyprus International University, Turkiye Tomiwa Sunday Adebayo --- Cyprus International University, TurkiyeThis study examines the connectedness among eco-friendly assets and how volatility in fossil energy markets affects this connectedness. Using a broad coverage for eco-friendly assets such as a clean energy index, a clean cryptocurrency (Cardano), a green bond index, and... -
Lack of evasive behaviour by a Martial Eagle Polemaetus bellicosus on impact with a turbine blade at a South African wind farm: causes and mitigations
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robert E Simmons --- University of Cape Town, South Africa Marlei Martins --- , South AfricaWe describe a collision of Africa’s largest raptor, the Martial Eagle Polemaetus bellicosus with a spinning blade at a South African wind farm in the Eastern Cape in July 2016, and the abandonment of the territory following a second fatal... -
On the skew eigenvalues of joined union of oriented graphs and applications
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Hilal A. Ganie --- , India Archana Ingole --- , India Ujwala Deshmukh --- , IndiaLet be an oriented graph with n vertices and m arcs having underlying graph G. The skew matrix of oriented graph , denoted by is a (−1, 0, 1)- skew symmetric matrix. The skew eigenvalues of are the eigenvalues of... -
The interconnectedness and spillover effects among economic uncertainty, energy-related risks and sovereign risk in BRICS economies
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Pascal Xavier Gnagne --- School of Economics, University of Johannesburg, South Africa Beatrice D. Simo-Kengne --- School of Economics, University of Johannesburg, South Africa Mathias Mandla Manguzvane --- School of Economics, University of Johannesburg, South AfricaEmerging economies experiencing energy-intensive growth face increased energy price volatility, which could fuel macroeconomic instability with possible implications on their debt repayment capacity. This study implements a quantile vector autoregressive model on a dataset collected between April 2011 and July... -
Evaluating the barriers to adoption of improved biomass cookstoves in Benue state, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chikamso Christian Apeh --- University of Agriculture and Environmental Sciences, Nigeria Stella Nwawulu Chiemela --- University of Nigeria, Nigeria Chinedum Jachinma Chiemela --- University of Nigeria, Nigeria Andrew Chiahalam Apeh --- Enugu State University of Science and Technology, NigeriaThe prevalent use of inefficient traditional stoves for biomass cooking energy in Nigeria contributes to high rates of biomass consumption, deforestation, and harmful pollutant emissions. This study aimed to assess the constraints hindering the adoption of improved biomass cookstoves (IBCS)... -
Grazing effects on forage quality parameters of three rangeland species in arid regions of Semnan, Iran
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Milad Kamiziani --- University of Kurdistan, Iran Shima Nikoo --- Semnan University, Iran Hamed Joneidi Jafari --- University of Kurdistan, Iran Fateme Naghizade Asl --- Gorgan University of Agricultural Sciences and Natural Resources, IranForage quality determines livestock production and overgrazing results in significant changes in forage quality of rangeland species. This study aimed to compare the effects of overgrazing on forage quality of Artemisia sieberi, Zygophyllum eurypterum and Stipa barbata as dominant species... -
Impact of postharvest handling technologies on income of tomato (Solanum Lycopersicum L.) smallholder farmers in Mvomero, Morogoro, Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Robert Geofrey --- Mzumbe University, Tanzania Eliaza Mkuna --- Mzumbe University, Tanzania Nyamsabhi M. Nyamwero --- Mzumbe University, Tanzania Kulwa Mang’ana --- Nelson Mandela African Institute of Science and Technology (NM-AIST), TanzaniaThis study investigates how smallholder tomato farmers in Mvomero District, Tanzania, utilize postharvest handling technologies (PHTs) and analyzes the factors influencing their adoption. We also assess the impact of PHTs on farmer income. Using a cross-sectional survey of 201 farmers,... -
Over half of South African beverages will require warning labels for high sugar and/or artificial sweeteners
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Wantonda Mukhovha --- University of the Witwatersrand, South Africa Naledi Sibiya --- University of the Witwatersrand, South Africa Thanujj Kisten --- University of the Witwatersrand, South Africa Molatela K Mamabolo --- University of the Witwatersrand, South Africa Siphiwe N Dlamini --- University of the Witwatersrand, South AfricaObjective: To determine the proportion of commercially available beverages that may require warning labels for high sugar content and the presence of artificial sweeteners in South Africa. -
Effect of altitudinal gradient on reproductive and feeding behaviours of four congeneric endemic freshwater fish in the Zat Catchment (Morocco)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Ahnich --- Polydisciplinary Faculty, Sultan Moulay Slimane University, Morocco F Aitboumalassa --- Polydisciplinary Faculty, Sultan Moulay Slimane University, Morocco H Khalki --- Polydisciplinary Faculty, Sultan Moulay Slimane University, Morocco M Naimi --- Polydisciplinary Faculty, Sultan Moulay Slimane University, MoroccoThe adaptive capacity of freshwater fish enables them to undergo morphological and structural changes in response to environmental fluctuations. Documenting these responses is crucial to assess species vulnerability to ecological perturbations. This study investigated the reproductive, feeding and physiological adaptations... -
Forecasting oil futures markets using machine learning and seasonal trend decomposition
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Ahhyun Kim --- Sungkyunkwan University, Korea Doojin Ryu --- Sungkyunkwan University, Korea Alexander Webb --- University of Wollongong, AustraliaCan machine learning improve prediction for seasonal commodity prices? We explore the effectiveness of a combined method that integrates seasonal trend decomposition using LOESS (STL) with machine learning (ML), referred to as STL-ML. We apply Extreme Gradient Boosting and Random... -
Techno-economic and environmental assessment of battery integrated wind farm siting across offshore Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Gbubemi Kevin Akporhonor --- Energy and Environment Cranfield University, United KingdomThis study investigates the economic, technical, and environmental impacts of integrating a battery energy storage system (BESS) with an offshore wind farm near Koko Sea Port, Nigeria. As renewable energy curtailment increases and Nigeria’s energy demand grows, energy storage systems... -
Renewable energy transition and employment dynamics in an emerging oil-producing economy: A case study of Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Clement Oteng --- University of Cape Coast, Ghana Iledare Omowumi --- SPE Africa Region and Member Board of the Society of Petroleum Engineers International (SPEi), Nigeria James Atta Peprah --- University of Cape Coast, Ghana Pius Gamette --- University of Cape Coast, GhanaShifting to sustainable renewable energy is justified by the failures of global markets brought on by climate change. However, many workers are uncertain about retraining their current employment considering the dynamics associated with renewable energy transition. This has become a... -
Solar energy, the silver bullet to tackle perennial energy access challenges in Nigeria rural households: A case study
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kesiena Owebor --- Delta State University, Nigeria Kesiena Ezewu --- Delta State University, Nigeria Justus Iroro Oboh --- Delta State University, Nigeria Jude Ebieladoh Sinebe --- Delta State University, Nigeria Ogheneakpobo Jonathan Eyenubo --- Delta State University, Nigeria Smith Orode Otuagoma --- Delta State University, Nigeria Esiri Monday Amagre --- Delta State University, NigeriaPoor access to clean energy impacts the livelihood of the Nigeria rural population. This study investigated the use of solar energy in tackling the recurrent energy access challenges in Isoko South, Nigeria. Both qualitative and quantitative methods were applied to... -
Spillovers, correlations and hedging among green bonds, clean energy stocks and fossil fuels: The effects of four turmoils
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Foday Joof --- Eastern Mediterranean University, Turkey Cahit Adaoglu --- Eastern Mediterranean University, Turkey Nigar Taspinar --- Eastern Mediterranean University, TurkeyThis study investigates the volatility spillovers and the hedging among green bonds, clean energy stocks, and fossil fuels markets. During the ten-year sample period between 2012 and 2022, four major turmoils are observed chronologically: The oil price plunge of 2014–2016,... -
Bounds on the spread and trace norm of the adjacency matrix of a graph
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bilal Ahmad Rather --- Shandong University of Technology, China Hilal A. Ganie --- Government Degree College Uri, India M. Imran --- Prince Mohammad Bin Fahd University, Saudi ArabiaThe trace norm of the adjacency matrix A(G) of a graph G is the sum of absolute values of the eigenvalues of A(G) and it is well-known in the literature under the name energy (graph energy) of G. The spread... -
Stability in an unbounded domain of a Timoshenko system without the second spectrum
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Mohammad M. Al-Gharabli --- King Fahd University of Petroleum and Minerals, Saudi Arabia Adel M. Al-Mahdi --- King Fahd University of Petroleum and Minerals, Saudi Arabia Aissa Guesmia --- Université de Lorraine, 3 Rue Augustin Fresnel, FranceThe present paper deals with the stability, in the whole line ℝ, of the so-called truncated version for the Timoshenko system derived, according to significant physical and historical observations, by Elishakoff [11]. This new system gives a version of a... -
Nehari manifold approach for a singular multi-phase variable exponent problem
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Mustafa Avci --- Athabasca University, CanadaThis paper is concerned with a singular multi-phase problem with variable singularities. The main tool used is the Nehari manifold approach. Existence of at least two positive solutions with positive-negative energy levels are obtained. For the illustration of the main... -
Digital advancement in the East African Community: The impact of information and communications technology on economic growth and energy consumption
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Abdikafi Hassan Abdi --- SIMAD University, Somalia Abdikarim Abdullahi Hersi --- SIMAD University, Somalia Abdiwahid Abdullahi Khalif --- SIMAD University, Somalia Mohamed Mire Mohamed --- SIMAD University, SomaliaAs the East African Community (EAC) modernizes and grows its digital infrastructure, it is essential to comprehend the influence of information and communications technology (ICT) on productivity and energy consumption to formulate initiatives that foster sustainable growth. Accordingly, this study...