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An assessment of cassava African mosaic disease in South Africa and Swaziland
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T.N. Trench --- Department of Microbiology and Plant Pathology, Republic of South Africa M.M. Martin --- Department of Microbiology and Plant Pathology, Republic of South Africa E.A. Hemmes --- Anglo American Centre for Cassava Research, Republic of South AfricaA preliminary assessment of the distribution of African mosaic disease (AMD) in cassava in Natal, Transvaal and Swaziland suggests that at present the threat to commercial plantings in Natal has been contained through (i) commercial establishment of cassava in an... -
REDESCRIPTIONS OF PLACOBDELLA STUHLMANNI (BLANCHARD, 1897) AND PLACOBDELLA GAROUI (HARDING, 1932) (HIRUDINEA: GLOSSIPHONIIDAE)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.H. Oosthuizen --- Department of Zoology, South AfricaThe two African leeches Placobdella stuhlmanni (Blanchard, 1897) and Placobdella garoui (Harding, 1932) are redescribed and figured because of the confusion that exists in the literature with regard to the specific identities of the two taxa. During a survey of... -
Fibre Techniques in Nielsen Periodic Point Theory On Solvmanifolds III: Calculations
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: PhilipR. Heath EdwardC. Keppelmann. This third paper of the series gives the necessarily lengthy illustrations of the main results of the first two, delayed until now for reasons of space. The illustrations in question concern calculations of the Nielsen type periodic point numbers... -
Separation of Convex Sets and Best Approximation in Spaces with Asymmetric Norm
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: S. CobzaşThe aim of the present paper is to show that some results in Banach spaces have their analogs in spaces with asymmetric seminorms. A space with asymmetric seminorm is a pair (X, p),where X is a real vector space and... -
More on operator Bellman inequality
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: F. Mirzapour --- Department of Mathematics, Faculty of Sciences, Iran A. Morassaei --- Department of Mathematics, Faculty of Sciences, Iran M.S. Moslehian --- Department of Pure Mathematics, Center of Excellence in Analysis on Algebraic Structures (CEAAS), IranWe present a Bellman inequality involving operator means for operators acting on a Hilbert space. We also give some Bellman inequalities concerning sesquilinear forms. Finally, we refine the Jensen's operator inequality and use it for obtaining a refinement of the... -
LMA CTrach™—Results of our first experience with the fiberoptic intubating laryngeal mask airway in 80 patients
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: P Hilbert --- Department of Anesthesiology, Intensive Care and Emergency Medicine, Germany M Birkmeier --- Department of Anesthesiology, Intensive Care and Emergency Medicine, Germany R Stuttmann --- Department of Anesthesiology, Intensive Care and Emergency Medicine, GermanyWe report on our initial clinical experience with the new LMA CTrach™. The intention was to evaluate its suitability in the routine anaesthetic working environment. Method: After inducing general anesthesia and muscle relaxation, the CTrach™ was used in elective patients,... -
Insertion of a temperature probe into the ProSeal® laryngeal mask airway drainage tube
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: M Singh --- Department of Anaesthesiology, India D Kapoor --- Department of Anaesthesiology, IndiaBackground: Temperature monitoring is one of the minimum mandatory monitoring standards of anaesthesiology. Intraoperative hypothermia and hyperthermia can both be detrimental for patients. We introduced a temperature probe into a Proseal® laryngeal mask airway (LMA) drainage tube, and measured patient... -
Comparison of the air-Q ILA™ and the LMA-Fastrach™ in airway management during general anaesthesia
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: EU Neoh --- Department of Anaesthesiology and Intensive Care, Malaysia YC Choy --- Department of Anaesthesiology and Intensive Care, MalaysiaOne hundred and sixty patients aged between 20–60 years with ASA physical status I-II, undergoing elective surgery under general anaesthesia, were enrolled into this prospective, randomised, double-blinded study to compare the success rate of tracheal intubation between the air-Q™ intubating... -
How to develop student-centred management cases
Item type: Journal Article • Journal: • Authors: Klaes Eringa --- Stenden University of Applied Sciences, Leeuwarden, The Netherlands Perry Yi Jin --- Stenden University of Applied Sciences, Leeuwarden, The NetherlandsCase studies are very popular in management education. Many case studies, however, are written at a level that is beyond the understanding of their target audience and therefore fail to do what they are intended for. The present study examines... -
How to develop student-centred management cases
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Klaes Eringa --- Stenden University of Applied Sciences, The Netherlands Perry Yi Jin --- Stenden University of Applied Sciences, The NetherlandsCase studies are very popular in management education. Many case studies, however, are written at a level that is beyond the understanding of their target audience and therefore fail to do what they are intended for. The present study examines... -
Evaluation of the Intubating Laryngeal Mask Airway (ILMA) as an intubation conduit in patients with a cervical collar simulating fixed cervical spine
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: S Saini --- Department of Anaesthesiology & Critical Care, India R Bala --- Department of Anaesthesiology & Critical Care, India R Singh --- Department of Orthopaedics Paraplegia and Rehabilitation, IndiaBackground: Cervical spine immobilisation with a semi-rigid cervical collar imposes difficulty in tracheal intubation. There is increasing use of the Intubating Laryngeal Mask Airway (LMA- FastrachTM) for intubation in patients with difficult airways. The present study was conducted to assess... -
An unusual case of hypercholesterolaemia with liver dysfunction
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Zareena Angamia --- , South Africa Frederick J Raal --- , South AfricaAlthough rare, the presentation of the genetic disease spectrum associated with lysosomal acid lipase (LAL) deficiency, a disorder named cholesteryl ester storage disease (CESD) or the more severe form of Wolman's disease, is an important condition to recognise. LAL plays... -
Statistical arbitrage on the JSE based on partial co-integration
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: A. J. Hoffman --- , South AfricaEarly forms of statistical arbitrage exploited the mean reversion of a model error extracted from pairs of instruments with a tendency to move together. Pairs trading was extended by Engle and Granger and by Johansen to include several co-integrated instruments... -
Timing, duration and symmetry of moult in Cape Gannets
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Oluwadunsin E Adekola --- , South Africa Robert JM Crawford --- , South Africa Bruce M Dyer --- , South Africa Azwianewi B Makhado --- , South Africa Leshia Upfold --- , South Africa Peter G Ryan --- , South AfricaLittle has been reported on moult in sulids, including gannets. The Cape Gannet Morus capensis is an endangered seabird endemic to southern Africa. We describe the timing, duration, symmetry and sequence of flight feather moult in Cape Gannets from two... -
Tactical asset allocation using the Kalman filter
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Reder van Rooyen --- , South Africa Gary van Vuuren --- , South AfricaTactical asset allocation (TAA) is a dynamic investment strategy which seeks actively to adjust fund allocation to a variety of asset classes by systematically exploiting inefficiencies and temporary imbalances in equilibrium values. This approach contrasts with strategic asset allocation (SAA)... -
Compassion or condemnation? South African Muslim students' attitudes to people with HIV/AIDS
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Zubeda Paruk --- School of Psychology, University of KwaZulu-Natal, Sitti Djamela Mohamed --- Health Promotion, University of KwaZulu-Natal, Cynthia Patel --- School of Psychology, University of KwaZulu-Natal (Howard College Campus), Sarojini Ramgoon --- School of Psychology, University of KwaZulu-Natal (Howard College Campus),Given the dearth of literature on the influence of religiosity on attitudes toward people with HIV/AIDS, the present study surveyed these variables in a sample of South African Muslim university students using the Religious Orientation Scale (ROS) and an attitude... -
Phylogenetic relationships of southern African geckos in the Pachydactylus group (Squamata: Gekkonidae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: AaronM. Bauer --- Villanova University, USA Trip Lamb --- East Carolina University, USAPachydactylus and its close relatives (Chondrodactylus, Colopus, Palmatogecko) constitute the most species‐rich component of the southern African gekkonid fauna. We conducted a phylogenetic analysis of mitochondrial (cytb, 12S rRNA, 16S rRNA) and nuclear (RAG‐1) gene sequences for these geckos. Pachydactylus... -
Small, specialised and highly mobile? The tree-hole breeding frog, Phrynobatrachus guineensis, lacks fine-scale population structure
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Laura Sandberger --- Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, Germany Heike Feldhaar --- University of Osnabrück, Germany KathrinP. Lampert --- University of Bochum, Germany DunjaK. Lamatsch --- Austrian Academy of Sciences and Institute for Limnology, Austria Mark-Oliver Rödel --- Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, GermanyData on population dynamics and distribution are of primary interest to biologists because they reveal information about the species' ecology and evolution and are thus essential for conservation efforts. Patchily distributed species are especially interesting for conservation studies, because of... -
An analysis of stock market prices by using extended Kalman filter: The US and China cases
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Özge Sezgin Alp --- Başkent University, Turkey Levent Özbek --- Ankara University, Turkey Bilge Canbaloglu --- Ankara Yıldırım Beyazıt University, TurkeyThis study decomposes the trend-cycle components of the stock market indices of the United States and China in a time series framework over the period of 1980–2021, and 1992–2021 years, respectively. Using the extended Kalman filter (EKF) method, the changing... -
Multiplicity of positive solution for Schrödinger-Poisson system with p-Laplacian
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Weiqiang Zhang --- Lanzhou University, People’s Republic of China Peihao Zhao --- Lanzhou University, People’s Republic of ChinaIn this paper, we consider the positive solutions for a Schrödinger-Poisson system containing p-Laplacian and Poisson equation. With a local condition on the potential, by using penalization method, Nehari manifold and Ljusternik-Schnirelmann category theory, the multiplicity and concentration of solutions... -
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,...
