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Root-shoot Growth Periodicity in Ocotea bullata
Item type: Journal Article • Journal: South African Forestry Journal • Authors: H. Kotze --- Division of Forest Science and Technology, Saasveld Forestry Research Centre, South Africa C.J. GeldenhuysPeriodicity in leaf fall, and in the growth of roots and shoots of Ocotea bullata was studied. Leaf fall of canopy trees was measured to establish the natural phenological pattern of mature trees. Shoot growth was measured on potted plants... -
Component dry masses and carbohydrate contents in honeybush II: Cyclopia subternata
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J Wooldridge --- Agricultural Research Council Infruitec-Nietvoorbij, South Africa ME Joubert --- Agricultural Research Council Infruitec-Nietvoorbij, South Africa M Booyse --- Agricultural Research Council Biometry Unit, South AfricaA four-year reconnaissance-level survey was carried out in a honeybush (Cyclopia subternata; Cs) population to obtain information concerning this new South African horticultural crop. Average total dry mass (DM) in Cs cuttings under plantation conditions was 2 481 g plant−1,... -
Phenology of woody plants in riverine thicket and its impact on browse availability to game species
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: BB Janecke --- Animal, Wildlife and Grassland Sciences, South Africa GN Smit --- Animal, Wildlife and Grassland Sciences, South AfricaThe study area was located in the central Free State Grassland biome, but the vegetation partially represented riparian thicket. Leaf carriage patterns of deciduous species were determined from September 2004 to August 2008. Similarities existed between Acacia karroo and Diospyros... -
Dedekind Order Completion of C (X) by Hausdorff Continuous Functions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: R. AnguelovThe concept of Hausdorff continuous interval valued functions, developed within the theory of Hausdorff approximations and originaly defined for interval valued functions of one real variable is extended to interval valued functions defined on a topological space X. The main... -
Hausdorff Continuous Solutions of Nonlinear Partial Differential Equations through the Order Completion Method
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Roumen Anguelov ElemerE RosingerIt was shown in [15] that very large classes of nonlinear partial differential equations (PDE's) have solutions which can be assimilated with usual measurable functions on the Euclidean domains of definition of the respective equations. In this paper the regularity... -
Binary Partitions in the Absence of Choice or Rearranging Russell's Socks
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Horst HerrlichGiven a sequence (Xn )n∈N of pairwise disjoint 2-element sets. Can ∪ n∈N Xn be rearranged as a union ∪ i∈I Yi of a family (Yi )i∈I of pairwise disjoint 2-element sets, indexed by an uncountable set I? It... -
Diversity patterns of temporary wetland macroinvertebrate assemblages in the south-western Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MC Mlambo --- Freshwater Research Unit, Department of Zoology, South Africa MS Bird --- Freshwater Research Unit, Department of Zoology, South Africa CC Reed --- Freshwater Research Unit, Department of Zoology, South Africa JA Day --- Freshwater Research Unit, Department of Zoology, South AfricaAlthough macroinvertebrates are potentially useful for assessing the condition of temporary wetlands, little is yet known about them. Macroinvertebrate assemblages were assessed in 138 temporary wetlands in the south-western Cape, recording 126 taxa. However, predicted richness estimates were all higher... -
Population Dynamics of the Wandering Albatross Diomedea Exulans at Marion Island: Longline Fishing and Environmental Influences
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D. C. Nel F. Taylor P. G. Ryan J. CooperThe subantarctic Prince Edward Islands (Marion and Prince Edward) support the largest breeding population of the Vulnerable wandering albatross Diomedea exulans. The number of birds breeding at Marion Island has fluctuated over the past three decades apparently as a result... -
Exchange of the Wandering Albatross Diomedea Exulans Between the Prince Edward and Crozet Islands: Implications for Conservation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J. Cooper H. WeimerskirchExchange of 61 wandering albatrosses Diomedea exulans has been recorded between the French Crozet Islands and the South African Prince Edward Islands, 1 068 km apart in the Southern Ocean. Most movements of banded birds (57) have been westwards, from... -
The Oldest Known Banded Wandering Albatross Diomedea Exulans at the Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J. Cooper H. Battam C. Loves P. J. Milburn L. E. SmithThe oldest known wandering albatross Diomedea exulans at the Prince Edward Islands is estimated to have been approximately half a century old when last recaptured in 2001. Demographic studies need to continue for several more decades before the true maximum... -
Nest Densities of the Wandering Albatross Diomedea Exulans at the Prince Edward Islands, Estimated Using Gps
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L. G. Underhill S. L. Petersen J. CooperHand-held Global Positioning System (GPS) receivers provide opportunities for detailed and rapid mapping of features, including biological ones, further enhanced by the removal during 2000 of "selective availability". GPS was used to map, describe and compare nest densities within wandering... -
Seasonal fluctuations in occurrence of inshore Bryde's whales in Plettenberg Bay, South Africa, with notes on feeding and multispecies associations
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GS Penry --- , UK VG Cockcroft --- Department of Zoology, Nelson Mandela Metropolitan University, South Africa PS Hammond --- , UKSeasonal fluctuations in the occurrence of inshore South African Bryde's whales Balaenoptera edeni were investigated between November 2005 and June 2008. Sighting data were collected in Plettenberg Bay on the south-east coast of South Africa. Bryde's whale occurrence was modelled... -
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... -
Recent population estimates and trends in numbers of albatrosses and giant petrels breeding at the sub-Antarctic Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PG Ryan --- , South Africa MGW Jones --- , South Africa BM Dyer --- Department of Environmental Affairs, South Africa L Upfold --- Department of Environmental Affairs, South Africa RJM Crawford --- Department of Environmental Affairs, South AfricaThe second mid-summer survey of surface-nesting seabirds at the Prince Edward Island group (Marion and Prince Edward islands) was conducted during December 2008, seven years after the initial mid-summer survey. Wandering albatrosses Diomedea exulans may have decreased slightly at Prince... -
An Independence Result Concerning Russell-Cardinals
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Eleftherios TachtsisWe show that it is consistent with ZF 0 that there exists a Russell-cardinal α such that the cardinals α 2 and 2α are incomparable. This answers in the negative a related question from Herrlich and Tachtsis “On the number... -
Re-expansion pulmonary oedema after evacuation of iatrogenic tension pneumothorax: a case report
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: S Goel --- Department of Anesthesiology and Intensive Care, India B Singh --- Department of Anesthesiology and Intensive Care, IndiaA 20- year male, ASA physical status grade I, was operated on for a duodenal fistula. The intra- and postoperative periods were uneventful. 10 days later, the right internal jugular catheter was substituted with a triple lumen catheter in the... -
Near-fatal outcome after administration of hyoscine-N-butylbromide (Buscopan®)
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: A Milner --- Department of Anaesthesia, South AfricaWhile undergoing conscious sedation for a gastroscopy, an 18-year-old female developed severe hypotension and loss of consciousness. This occurred shortly after an intravenous dose of hyoscine-N-butylbromide (Buscopan®). Resuscitation was performed over a period of 10 minutes and was successful. Once... -
Anaesthesia with dexmedetomidine and remifentanil in a child with mitochondrial myopathy
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: B Burnett --- Department of Anesthesiology, L Schwartz --- Department of Anesthesiology, JD Tobias --- Department of Anesthesiology and Pain Medicine,Patients with mitochondrial disorders have complex physiological issues which create a challenging scenario with regard to the safe provision of anaesthetic care. Within the spectrum of mitochondrial disorders, patients can be susceptible to multiple adverse effects and drug reactions from... -
Haemodynamic and anaesthetic advantages of dexmedetomidine
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: SH Rao --- Department of Anaesthesia and Critical Care, India B Sudhakar --- Department of Anaesthesia and Critical Care, India PK Subramanyam --- Department of Anaesthesia and Critical Care, IndiaObjectives: The aim of this study was to describe the effect of dexmedetomidine on haemodynamic stability in the intraoperative period, as well as on the pressor response to intubation and extubation and the requirement of inhalation anaesthetics and recovery. -
Perioperative effect of epidural dexmedetomidine with intrathecal bupivacaine on haemodynamic parameters and quality of analgesia
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: D Jain --- Department of Anaesthesiology and Intensive Care, India RM Khan --- Department of Anaesthesiology, Oman D Kumar --- Department of Medicine, India N Kumar --- Department of Anaesthesiology and Intensive Care, IndiaBackground: The present study was a randomised controlled trial designed to evaluate the perioperative effect of epidural dexmedetomidine, in conjunction with intrathecal bupivacaine. -
Comparison of dexmedetomidine, pethidine and tramadol in the treatment of post-neuraxial anaesthesia shivering
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Lim Fern --- Department of Anaesthesia and Intensive Care, Malaysia Karis Misiran --- Department of Anaesthesia and Intensive Care, MalaysiaObjective: This study was performed to compare the effectiveness of intravenous dexmedetomidine with that of pethidine and tramadol in the treatment of post-neuraxial anaesthesia shivering. -
Burrow utilization by springhares (Pedetes capensis) in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: D.M. Peinke --- Department of Zoology and Entomology, South Africa C.R. Brown --- Department of Zoology and Entomology, South AfricaThe use of burrows by springhares was investigated in the Eastern Cape, South Africa using radio telemetry. Springhares utilized 4–27 different burrows scattered over areas ranging from 0.6–28.5 ha, with maximum distances of 170–1000 m between burrows. Springhares frequently changed... -
Spring diet and trophic partitioning in an alpine lizard community from Morocco
Item type: Journal Article • Journal: African Zoology • Authors: Miguel A. Carretero --- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO/UP), Campus Agrário de Vairão, Portugal Anna Perera --- Departamento de Biologia Animal, Spain D. James Harris --- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO/UP), Campus Agrário de Vairão, Portugal Vasco Batista --- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO/UP), Campus Agrário de Vairão, Portugal Catarina Pinho --- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO/UP), Campus Agrário de Vairão, PortugalOukaïmeden Plateau is a herpetologically rich locality in the High Atlas (Morocco) where four lizard species coexist in strict sympatry: three lacertids (Lacerta perspicillata chabanaudi, L. andreanszkyi and Podarcis vaucheri – formerly P. hispanica vaucheri) and one gekkonid (Quedenfeldtia trachyblepharus)... -
Seasonal pattern of chytridiomycosis in common river frog (Amietia angolensis ) tadpoles in the South African Grassland Biome
Item type: Journal Article • Journal: African Zoology • Authors: Werner Conradie --- Department of Herpetology, South Africa Ché Weldon --- Unit for Environmental Research: Zoology, North-West University, South Africa Kevin G. Smith --- Tyson Research Centre, Washington University in St. Louis, U.S.A. Louis H. Du Preez --- Unit for Environmental Research: Zoology, North-West University, South AfricaEnvironmental parameters such as temperature and rainfall influence the biology of amphibians and are likely to similarly influence the growth and prevalence of associated pathogens. Amphibian chytrid fungus, Batrachochytrium dendrobatidis (Bd), causes an infectious disease, chytridiomycosis, in amphibians worldwide. Field... -
New evidence of homoplasy within the African genus Varicorhinus (Cyprinidae): an independent origin of specialized scraping forms in the adjacent drainage systems of Ethiopia inferred from mtDNA analysis
Item type: Journal Article • Journal: African Zoology • Authors: Boris A. Levin --- Institute of Biology of Inland Waters, Russian Academy of Sciences, Russia Alexander S. Golubtsov --- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Russia Yuri Yu. Dgebuadze --- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Russia Nikolai S. Mugue --- Koltsov Institute of Developmental Biology, Russian Academy of Sciences, RussiaInterrelationships of the two specialized scraping periphyton-feeders, Varicorhinus beso and V. jubae, and some large African barbs, Labeobarbus spp., inhabiting three main regions of Ethiopia (the Western and Eastern Plateaus, and the Rift Valley separating them) were investigated using the... -
Dexmedetomidine premedication in cataract surgery under topical anaesthesia: to assess patient and surgeon satisfaction
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Poonam S Ghodki --- Department of Anaesthesiology, India Shalini P Sardesai --- Department of Anaesthesiology, India Swapnagandha S Halikar --- Department of Ophthalmology, IndiaBackground: Dexmedetomidine is a potent non-opioid analgesic that may enhance analgesia for cataract surgery under topical anaesthesia. This study was undertaken to assess sedation and analgesia provided by dexmedetomidine and evaluating patients’ satisfaction. Secondary aims were: (1) To study the... -
How relevant are Hofstede’s dimensions for inter-cultural studies? A replication of Hofstede’s research among current international business students
Item type: Journal Article • Journal: • Authors: Klaes Eringa --- Stenden Hotel Management School, Stenden University of Applied Sciences, Leeuwarden, The Netherlands Laura N. Caudron --- Stenden Hotel Management School, Stenden University of Applied Sciences, Leeuwarden, The Netherlands Kathrin Rieck --- Stenden Hotel Management School, Stenden University of Applied Sciences, Leeuwarden, The Netherlands Fei Xie --- Stenden Hotel Management School, Stenden University of Applied Sciences, Leeuwarden, The Netherlands Tobias Gerhardt --- Stenden Hotel Management School, Stenden University of Applied Sciences, Leeuwarden, The NetherlandsIn the present study the cultural dimensions of the well known Dutch researcher Geert Hofstede were tested on a sample of international business students. The sample consisted of 1 033 students from the Netherlands, Germany, China, South Africa and Qatar. The findings... -
Comparison of dexmedetomidine versus midazolam for intranasal premedication in children posted for elective surgery: a double-blind, randomised study
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Deepak Singla --- Department of Anaesthesia, Country Gunjan Chaudhary --- Department of Anaesthesia, Country Jagdish Dureja --- Department of Anaesthesia, Country Mishu Mangla --- Department of Obstetrics and Gynaecology, IndiaObjective: The aim of this study was to compare the effect of dexmedetomidine with midazolam for intranasal premedication in children posted for elective surgery. -
Antecedents of Bullying in the South African Workplace: Societal Context Matters
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Ngao Motsei --- Department of Human Resource Management, South Africa Stella M. Nkomo --- Department of Human Resource Management, South AfricaWhile there is a growing interest in the role of organizational context in workplace bullying, little is known about how societal context may influence perceptions of bullying in organizations. Context is defined as situational factors in the external environment which... -
Efficacy of premixed versus sequential administration of dexmedetomidine as an adjuvant to intrathecal hyperbaric bupivacaine in lower limb surgery
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Gunjan Chaudhry --- Department of Anaesthesiology, India Deepak Singla --- Department of Anaesthesiology, India Jagdish Dureja --- Department of Anaesthesiology, India Pranav Bansal --- Department of Anaesthesiology, India Kirti Ahuja --- Department of Anaesthesiology, IndiaObjective: To evaluate the efficacy of intrathecal hyperbaric bupivacaine premixed with dexmeditomidine compared with sequential administration in separate syringes on block characteristics, haemodynamic parameters, side effect profile and postoperative analgesic requirement. -
Vegetation dynamics after experimental fire disturbance in the arid Succulent Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Helga van der Merwe --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Sebataolo Rahlao --- Invasives Monitoring and Reporting, South Africa Liesel Hein --- South African Environmental Observation Network, South Africa Suzanne J Milton --- South African Environmental Observation Network, South AfricaDisturbance by fire in the Succulent Karoo is rare but fire events could increase as a result of an increase in grassiness (alien and indigenous species). This study assessed the effects of fire eight years after an experimentally induced burn... -
Dexmedetomidine in premedication to attenuate the acute hyperdynamic response to ECT: a randomised, double-blind, controlled study
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Aparna Abhijit Bagle --- Department of Anaesthesiology, India WS Thatte --- Department of Anaesthesiology, India Pranita Arun Kate --- Department of Anaesthesiology, IndiaBackground: The choice of anaesthetic agent for electroconvulsive therapy (ECT) depends on seizure duration, haemodynamic and recovery parameters. The aim of the study was to assess the effects of dexmedetomidine premedication on haemodynamic, seizure duration, recovery characteristics and agitation following... -
The Illusion of Truth in Three Kenyan Crime Novels
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Larry Ndivo --- Department of Linguistics & Languages, KenyaFocusing on crime autobiography in Kenya, this article reads John Kiriamiti’s three novels, My Life in Crime (1984), My Life with a Criminal: Milly’s Story (1989) and My Life in Prison (2004) to argue that although the writer adopts confession... -
How relevant are Hofstede's dimensions for inter-cultural studies? A replication of Hofstede's research among current international business students
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Klaes Eringa --- Stenden Hotel Management School, Stenden University of Applied Sciences, The Netherlands Laura N. Caudron --- Stenden Hotel Management School, Stenden University of Applied Sciences, The Netherlands Kathrin Rieck --- Stenden Hotel Management School, Stenden University of Applied Sciences, The Netherlands Fei Xie --- Stenden Hotel Management School, Stenden University of Applied Sciences, The Netherlands Tobias Gerhardt --- Stenden Hotel Management School, Stenden University of Applied Sciences, The NetherlandsIn the present study the cultural dimensions of the well known Dutch researcher Geert Hofstede were tested on a sample of international business students. The sample consisted of 1 033 students from the Netherlands, Germany, China, South Africa and Qatar... -
Seasonal population dynamics and energy consumption by waterbirds in a small temperate estuary
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jeffrey W Hean --- Department of Zoology and Entomology, South Africa Adrian JFK Craig --- Department of Zoology and Entomology, South Africa Nicole B Richoux --- Department of Zoology and Entomology, South AfricaSimple measures of population dynamics and energy consumption can provide baseline information on the role of consumers in food webs, particularly for cryptic or highly-mobile species of waterbirds. We provide estimates of the seasonal population dynamics and energy consumption of... -
Long-term trends in cetacean occurrence during the annual sardine run off the Wild Coast, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Caputo --- Department of Zoology and Entomology, South Africa PW Froneman --- Department of Zoology and Entomology, South Africa D du Preez --- School of Environmental Sciences, South Africa G Thompson --- KwaZulu-Natal Sharks Board, South Africa S Plön --- School of Environmental Sciences, South AfricaDuring the austral winter, cetaceans and other apex predators follow the annual northeastward movement of shoaling sardines, known as the sardine run, along the southeast coast of South Africa, including a 400-km stretch called the Wild Coast. In total, 131... -
Analgesic efficacy of dexmedetomidine versus fentanyl as an adjunct to thoracic epidural in patients undergoing upper abdominal surgery: a randomized controlled trial
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Neerja Bharti --- Department of Anesthesia & Intensive Care, India Shweta N Pokale --- Department of Anesthesia & Intensive Care, India Indu Bala --- Department of Anesthesia & Intensive Care, India Vikas Gupta --- Department of Surgery, IndiaBackground: This randomised, double-blind study was designed to assess the analgesic efficacy of dexmedetomidine as compared with fentanyl as an adjunct to local anaesthetic in thoracic epidural for upper abdominal surgeries. -
Intra-articular dexmedetomidine with bupivacaine versus bupivacaine alone for postoperative analgesia after knee arthroscopy
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Shaimaa F Mostafa --- Department of Anesthesia and Surgical ICU, Faculty of Medicine, Egypt Gehan M Eid --- Department of Anesthesia and Surgical ICU, Faculty of Medicine, Egypt Mohammed A Abdullah --- Department of Anesthesia and Surgical ICU, Faculty of Medicine, Egypt Rehab S Elkalla --- Department of Anesthesia and Surgical ICU, Faculty of Medicine, EgyptBackground: Optimal relief of pain after knee arthroscopy is essential for early rehabilitation and mobilisation and to minimise postoperative morbidity. This study’s aim was to assess dexmedetomidine as an additive to intra-articular (IA) bupivacaine in terms of analgesic duration and... -
Behind the emergence of management scholarly communities in Asia and Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: David B. Zoogah --- Williams College of Business, South Africa Mike W. Peng --- Jindal School of Management, USA Bruce T. LamontManagement scholarly communities have recently emerged in Asia and Africa. What are the antecedents behind their rise? What are the processes that facilitate their acceptance by internal and external stakeholders? Drawing on the sociology of science literature, this article develops... -
Adult weight measurement: decoding the terminology used in literature
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Christen Renée Lahner --- Department of Human Nutrition and Dietetics, South AfricaThere are various types of names given to describe the adult weight measurement. The most commonly used terms (actual body weight, estimated body weight, ideal body weight and adjusted body weight) have been defined and summarized to assist in their... -
Sedentary behaviour and sleep problems among young, middle-aged, and older persons in South Africa: A brief report
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- Deputy Vice Chancellor Research and Innovation Office, South Africa Supa Pengpid --- ASEAN Institute for Health Development, Mahidol University, ThailandThe study aimed to investigate the relationship between sedentary behaviour and sleep problems in a large national community sample in South Africa. We analysed an existing cross-sectional population data set, the “South African National Health and Nutrition Examination Survey”. The... -
First report of Wolbachia from field populations of Culex mosquitoes in south-western Nigeria
Item type: Journal Article • Journal: African Zoology • Authors: Tosin Segun Ogunbiyi --- Redeemer’s University, Nigeria Philomena Eromon --- Redeemer’s University, Nigeria Paul Oluniyi --- Redeemer’s University, Nigeria Femi Ayoade --- Redeemer’s University, Nigeria Owoicho Oloche --- Redeemer’s University, Nigeria Judith Uche Oguzie --- Redeemer’s University, Nigeria Onikepe Folarin --- Redeemer’s University, Nigeria Christian Happi --- Redeemer’s University, Nigeria Isaac Komolafe --- Redeemer’s University, NigeriaRecent reports on finding Wolbachia-strain infections in field mosquito species in some West African countries and the potential for developing these as disease vector biocontrol tools have prompted a search for Wolbachia in mosquitoes within the study area. Using a... -
Gestational trophoblastic disease managed at Grey's Tertiary Hospital: a five-year descriptive study
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: Bongumusa S Makhathini --- Grey’s Hospital, Department of Obstetrics and Gynaecology, Faculty of Health Sciences, South Africa Greta Dreyer --- Gynaecologic Oncology Unit, Department of Obstetrics and Gynaecology, South Africa Eckhart J Buchmann --- Department of Obstetrics and Gynaecology, South AfricaBackground: A study was undertaken to describe the outcomes of gestational trophoblastic disease (GTD) and to determine the influence of antecedent pregnancy, the distance travelled by patients to Grey's Hospital (GH), and HIV status on the disease and clinical outcomes. -
Performance optimization of jaw-type rock crushing machine through shaft eccentricity redesign
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Peter Kayode Oke --- , Nigeria A. Alonge --- , Nigeria Niyi Gideon Olaiya --- , NigeriaThe recurrent failure of jaw-type crushing machine was traced to an inappropriate external shaft ratio and frequent wear of the jaw of the machine. Current jaw-type crushing machines are designed and constructed with spring steel was improvised with spring steel... -
Presence of microplastics in benthic macroinvertebrates along the Kenyan coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: W Awuor --- , Kenya AWN Muthumbi --- , Kenya DV Robertson-Andersson --- , South AfricaMicroplastics (MPs) are plastics less than 5 mm in diameter. Their small size renders them invisible to deposit- and filter-feeding fauna, leading to unintentional ingestion. This study investigated the presence of MPs in an oyster (Saccostrea cuccullata) and three species... -
Reliability and quality of artificial nectar feeders for birds in the Cape Floristic Region
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Anina Coetzee --- , South Africa Phoebe Barnard --- , South Africa Anton Pauw --- , South AfricaSupplementary feeding of birds may have considerable ecological and evolutionary effects on bird communities. However, there is a lack of basic information on the prevalence, frequency and quality of supplementary feeders, especially in African urban areas. Here we describe the... -
Salt marsh erosion in a microtidal estuary
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Riddin --- , South Africa JB Adams --- , South AfricaSalt marshes protect estuary banks from erosion by acting as buffers between marine and terrestrial environments. Residents living near the Breede River estuary, Western Cape Province, South Africa, raised concerns about ongoing erosion evident at Groenpunt, the main salt marsh... -
The future of work in Africa in the era of 4IR – The South African perspective
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Marcia Mkansi --- , South Africa Nico Landman --- , South AfricaAlthough the correlation between technology and the changing labor landscape has been the subject of much research, there are growing concerns regarding the rise of automation and its impact on the job market. Research focus has been on jobs that... -
Understanding ICT adoption amongst SMEs in Uganda: Towards a participatory design model to enhance technology diffusion
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Stephen Kyakulumbye --- , South Africa Shaun Pather --- , South AfricaPolicy statements by the United Nations, the African Union and most African countries boldly pronounce on the anticipated benefits of the internetworked world and associated ICT to society in general and to the world of business specifically. In terms of... -
A review of the responses of medium- to large-sized African mammals to fire
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Willem A Nieman --- , South Africa Brian W van Wilgen --- , South Africa Frans GT Radloff --- , South Africa Alison J Leslie --- , South AfricaAn improved understanding of how fire affects African mammals is important for the management of both fire regimes and mammal populations. The response of mammals (>5 kg) to fire was reviewed to identify habitat preferences, and to inform fire management... -
Nematode community structure and distribution along the Kenyan continental shelf
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SM Hashim --- University of Nairobi, Kenya AWN Muthumbi --- University of Nairobi, Kenya JM Githaiga --- University of Nairobi, Kenya J Okondo --- Kenya Marine and Fisheries Research Institute (KMFRI), KenyaMeiofauna communities were analysed from samples collected at four stations on the Kenyan continental shelf (Shimoni, Kwale, Mombasa and Kilifi) during the maiden cruise of the RV Mtafiti, 12–21 December 2015. Nematodes were identified to genus level, and their distribution... -
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... -
Two new species of Stephopaedes (Anura: Bufonidae) from Tanzania, with a review of the genus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: JohnC. Poynton --- , U.K. BarryT. Clarke --- , U.K.Two new species of Stephopaedes are described from Mafia Island and the Usambara foothills, castern Tanzania. The four species now recognized in this eastern African forest-associated genus are diagnosed and discussed. Osteological details are included. As with other small-sized African... -
Arthroleptis troglodytes and the content of schoutedenella (Amphibia: Anura: Arthroleptidae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: JohnC. Poynton --- Natural History Museum, UKLaurent (1954) transferred a large number of species then in Arthroleptis to the genus Schoutedenella, which up to that time was a monotypic genus distinguished by de Witte (1921) from Arthroleptis on the grounds of lacking maxillary teeth. Laurent's concept... -
Cardioglossa liberiensis Barbour & Loveridge 1927 is a junior synonym of Phrynobatrachus fraterculus (Chabanaud 1921)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DavidC. Blackburn --- Harvard University, U.S.A.In 1927, Barbour & Loveridge described two species of Cardioglossa based on seven specimens from Liberia: C. decorata (six specimens) and C. liberiensis. Cardioglossa decorata has long been recognized as a junior synonym of Phrynobatrachus fraterculus (Chabanaud 1921), which is... -
Rediscovery and identity of Phrynobatrachus monticola Fischer, 1884
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mark‐Oliver Rödel --- Biocenter of the University, Germany Jakob Hallermann --- University of Hamburg, GermanyWe report on the rediscovery of the type specimen of Phrynobatrachus monticola Fischer, 1884 and clarify its real taxonomic position within the sub‐Saharan ranid genus Tomopterna. We redescribe the type and compare it to the other four currently recognized East... -
Gathering the Dust: Narrating National Hauntologies and Futures in Yvonne Adhiambo Owour’s Dust
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Felix Mutunga Ndaka --- University of Johannesburg, South AfricaThis paper offers a reading of Yvonne Owour’s Dust as a text that engages with national histories in a bid to trouble official Kenyan public memories and re-imagine Kenyan visions of the future. In this article, I argue that the... -
Examining leaders’ emotional intelligence as a distal antecedent of employee engagement: The role of employee voice and trust in direct leadership
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Okechukwu Ethelbert Amah --- Pan-Atlantic University,The study investigated leaders’ emotional intelligence (EI) as a distal antecedent of employee engagement, using employee voice and trust in direct leadership as mediating variables. Based on the Affective Event Theory, the study recognized the emotional intelligence of leaders as... -
Strengths use in the workplace: A meta-analysis
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: --- School of Labor and Human Resources, Renmin University of China, China --- School of Labor and Human Resources, Renmin University of China, China --- School of Labor and Human Resources, Renmin University of China, China --- School of Labor and Human Resources, Renmin University of China, ChinaThis meta-analysis aimed to clarify the relationship between perceived organisational support and core self-evaluations and strengths use and task performance outcomes utilising a cross-temporal versus time-lagged research design. Drawing on the random effects model, this study combined 44 effect sizes... -
The Golomb topology of polynomial rings, II
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Dario Spirito --- Università degli Studi di Udine, ItalyWe study the interplay of the Golomb topology and the algebraic structure in polynomial rings K[X] over a field K. In particular, we focus on infinite fields K of positive characteristic such that the set of irreducible polynomials of K[X]... -
Hereditarily projectable Archimedean lattice-ordered groups with unit
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Anthony W. Hager --- Wesleyan University, USA Brian Wynne --- , USALet W be the category of Archimedean lattice-ordered groups with distinguished weak unit and unit-preserving ℓ-group homomorphisms. We denote by P, wP, Loc, HA, respectively, the collections of projectable, weakly projectable, local, and hyperarchimedean W-objects. For any C ⊆ W,... -
Generating functions in Riesz spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Youssef Azouzi --- Tunis-El Manar University, Tunisia Youssef Nasri --- Tunis-El Manar University, TunisiaWe introduce and study the concept of generating function for natural elements in a Dedekind complete Riesz space equipped with a conditional expectation operator. This allows us to study discrete processes in a free-measure setting. In particular we improve a... -
Growth and adaptability of provenances and progenies of Pinus maximinoi H.E.Moore in northern Mozambique
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Cremildo Riba Gouveia Dias --- Agricultural Research Institute of Mozambique, Mozambique Laurina Adriano Guacha --- Institute of Geography and Spatial Planning, University of Lisbon, Portugal Aires Afonso Mbanze --- Universidade Lúrio (Campus Universitário de Unango), MozambiqueThe aim of this study was to evaluate the growth and adaptability of Pinus maximinoi provenances and progenies and to estimate the genetic variation that could be exploited in feature improvement (e.g. breeding studies). Data from this study are from... -
Fubini’s theorem for a vector-valued Daniell integral
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jacobus J. Grobler --- North-West University, South AfricaWe define the product integral for two Riesz space-valued Daniell integrals and prove Fubini’s theorem establishing the relation between product integrals and iterated integrals. The properties of the Fremlin tensor product of two Archimedean Riesz spaces enable one to do... -
Partitioning the sources of sediment organic carbon in South African seagrass meadows
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Bossert --- Stellenbosch University, South Africa S von der Heyden --- Stellenbosch University, South Africa J Colling --- Stellenbosch University, South Africa A Ndhlovu --- Stellenbosch University, South AfricaIn the sediments of seagrass meadows, allochthonous carbon sources can account for 50–90% of sediment organic carbon (SOC), in which non-seagrass carbon is derived from external organic matter advected into the meadow’s sediments or trapped by the seagrass canopy. Identifying... -
Diet of a Maghreb Owl Strix mauritanica individual at Kahf Lakhal cave on Jbel Moussa, northern Morocco
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abdeslam Rihane --- , Morocco Abdelmottalib Nahli --- University of Hassan II Casablanca, Morocco EL-Mustapha Laghzaoui --- , Morocco Youssef Dbiba --- , Morocco Mohamed Radi --- , Morocco Mohamed Dakki --- , Morocco El Hassan El Mouden --- , Morocco Rhimou El Hamoumi --- University of Hassan II Casablanca, MoroccoThe diet of a single Maghreb Owl Strix mauritanica (family Strigidae) was examined within its natural habitat at Kahf Lakhal cave on Jbel Moussa, a mountain in northern Morocco. The two distinct batches of pellets collected contained a total of... -
Index characterization and monogenity of septic number fields defined by x 7 + ax 4 + b
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Omar Kchit --- Sidi Mohamed ben Abdellah University, MoroccoIn this paper, we calculate the index of any septic number field K generated by a root α of a monic irreducible trinomial F(x) = x 7 + ax 4 + b ∈ ℤ[x]. Our approach is based on Engstrom’s... -
Untangling the Magelonidae (Annelida: Polychaeta) of southern Africa, including the description of a new species
Item type: Journal Article • Journal: African Zoology • Authors: Kate Mortimer --- Amgueddfa Cymru-Museum Wales, United Kingdom Dylan T Clarke --- Iziko Museums of South Africa, South Africa‘A monograph on the Polychaeta of Southern Africa’ by J. H. Day, published in 1967 and covering over 700 species, was considered an essential reference text for marine biologists. Nonetheless, despite the major contribution it has made, we now know... -
Subversive narratives and protest against apartheid in Mandla Myeko’s Apho Sikhala Khona Isikhwatsha radio drama
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Khaya Gqibitole --- University of Zululand, South AfricaThis article celebrates one hundred years of South African radio broadcasting. It examines the role a Xhosa radio drama played in conscientizing its audience during apartheid. It also demonstrates the value of radio drama as an art form and its... -
An infinite family of number fields arising from quadrinomials with given p-indices
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Omar Kchit --- Sidi Mohamed ben Abdellah University, MoroccoLet be a number field defined by a monic irreducible quadrinomial , where n > m > 1 are positive integers. In this paper, for any prime number p and for some fixed positive integers ip , we provide infinite... -
Federated machine learning for cross-bank credit card fraud detection: A privacy-preserving framework
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Dhanveer Singh --- Technology Leader Capital One USA, USA Raja Chattopadhyay --- Technology Leader Capital One USA, USAFederated machine learning is a solution to the problem of identifying instances of credit card fraud in any bank without violating privacy laws. The framework proposed in this paper any bank without violating privacy laws. The framework proposed in this... -
Spatiotemporal shape variation in sagittal otoliths of spotted grunter Pomadasys commersonnii in South African estuaries
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: V Coetzee --- Department of Biological Sciences, University of Cape Town, South Africa S Kerwath --- Department of Biological Sciences, University of Cape Town, South Africa S Lamberth --- Department of Forestry, Fisheries and the Environment (DFFE), South Africa D Parker --- Department of Biological Sciences, University of Cape Town, South AfricaThe morphological structure of fish otoliths is under dual regulation by genetic and environmental factors, and has been successfully used to aid stock delineation. This study examined whether differences in sagittal otolith shape outlines could be used to delineate potential...