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Characteristics of fire behaviour in the montane grasslands of natal
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: TheresaM. Everson --- Department of Environment Affairs, Directorate of Forestry, F.R. Smith --- Department of Environment Affairs, Directorate of Forestry, C.S. Everson --- Department of Environment Affairs, Directorate of Forestry,Fire behaviour characteristics were investigated in the montane grasslands of the Natal Drakensberg. The behaviour of experimental fires was measured together with the accompanying biotic and abiotic conditions. Estimates of heat yield, mass of available fuel and forward rate of... -
Tegniek vir die bepaling van die hoeveelheid staande droë benutbare materiaal in sentrale hoër karooveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J G V Joubert --- Departement Akkerbou en Weiding,Die hoeveelheid benutbare materiaal (kg. ha‐1) word bereken vanaf die aantal plante per hektaar en die gemiddelde droë materiaal opbrengs per plant op ‘n 40 persent snoeibasis. Die kroonverspreidingspersentasie en kroondeursnit afmetings van die spesies word gebruik in die berekening... -
The grazing index method of range condition assessment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C.V. du Toit --- Department of Agriculture, Republic of South AfricaOwing to the difficulty of examining succession theory in the Karoo, it is suggested the ecological index method (EIM), be replaced by the grazing index method (GIM), through the introduction of grazing index values (GIV) for Karoo plant species. The... -
Description of a method for assessing veld condition in the Karoo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C.V. du Toit --- , Republic of South AfricaIn the past, veld condition in the Karoo was assessed according to the ecological index method. This has recently been replaced by the grazing‐index method. The principles governing the method of botanical survey remain the same, but this methodology has... -
Research note: Grazing‐index method procedures of vegetation surveys
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C.V. du Toit --- , Republic of South AfricaIn the past, veld condition in the Karoo was assessed using the ecological index method. This recently changed to the grazing‐index method on account of the differently estimated grazing‐index values being used. The principles governing the method of survey remain... -
SPREAD UNIFORMITIES AND UNIFORM SPREADS
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Hlengani Slweya --- Department of Mathematics, University of the North, Sovenga, South Africa,We discuss a point-free analog of the topological fact that every uniformly continuous function on a dense subspace of a uniform space into a complete uniform space has a unique uniformly continuous extension. It is shown that a uniform frame... -
Migraine-associated vertigo and dizziness as presenting complaint in a private general medical practice
Item type: Journal Article • Journal: South African Family Practice • Authors: T Jay-du Preez --- Department of Physiology, Faculty of Health Sciences, South Africa D Van Papendorp --- Department of Physiology, Faculty of Health Sciences, South AfricaBackground: Migraine-associated vertigo (MV) remains a developing entity because accepted diagnostic criteria are unavailable. Patients present with debilitating dizziness without experiencing headache, and are often misdiagnosed as anxious. The condition is manageable in primary care without the need for neurological... -
Price earnings ratios on the Johannesburg Stock Exchange - Are they a guide to value?
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: G D I Barr --- Department of Statistical Science and Economics, B S Kantor --- Department of Economics,This paper tests whether there is an equilibrium relationship between prices and earnings on the Johannesburg Stock Exchange (JSE). Such a relationship would hold if the JSE Index and index earnings were cointegrated, A full explanation of the technique of... -
Uncertainty, cost of capital and financial disclosure: A review of the theory and some evidence
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: M Negash --- University of the Witwatersrand,This paper contains a critical review of the uncertainty research, and reports on the relationship between corporate disclosure and the adverse selection component of the buy-sell (bid-ask) spread of stock prices. Order processing and holding costs will be decoupled from... -
Uncertainty, cost of capital and financial disclosure: A review of the theory and some evidence
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: M Negash --- University of the Witwatersrand,This paper contains a critical review of the uncertainty research, and reports on the relationship between corporate disclosure and the adverse selection component of the buy-sell (bid-ask) spread of stock prices. Order processing and holding costs will be decoupled from... -
Introduction, establishment and spread of the Southern mouthbrooder Pseudocrenilabrus philander in the Baakens River, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Cuen Muller --- Zoology Department, South Africa Olaf LF Weyl --- South African Institute for Aquatic Biodiversity, South Africa Nadine A Strydom --- Zoology Department, South AfricaThis paper provides evidence for the extralimital establishment and spread of Pseudocrenilabrus philander in the Baakens River, Eastern Cape, South Africa. Since the first occurrence record at a single locality in 1994 this species has now spread throughout the river... -
What factors determine the use of the nutrition information on the food label when female consumers from Pietermaritzburg select and purchase fat spreads?
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: NL. Wiles --- Discipline of Dietetics and Human Nutrition, Pietermaritzburg M. Paterson --- Discipline of Dietetics and Human Nutrition, Pietermaritzburg JL. Meaker --- Discipline of Dietetics and Human Nutrition, PietermaritzburgObjectives: This study set out to determine the following in relation to the nutrition information on the food labels of selected fat spreads: the demographic profile of female consumers using the food label, reasons for food label use and whether... -
Invasion status of Florida bass Micropterus floridanus (Lesueur, 1822) in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: OLF Weyl --- DST/NRF Research Chair in Inland Fisheries and Freshwater Ecology, South Africa MK Schirrmann --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa JS Hargrove --- Wildlife Ecology and Conservation Department, USA T Bodill --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa ER Swartz --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaLargemouth bass Micropterus salmoides are a popular North American angling species that was introduced into South Africa in 1928. To enhance the largemouth bass fisheries, Florida bass Micropterus floridanus were introduced into KwaZulu Natal, South Africa, in 1980. Knowledge on... -
Minimum corporate website disclosure levels and information asymmetry: Evidence from Johannesburg Stock Exchange small-cap companies
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: George Nel --- School of Accountancy, Stellenbosch University, South Africa Roelof Baard --- School of Accountancy, Stellenbosch University, South AfricaThe use of corporate websites as communication medium may contribute to good governance and specifically transparency as one of the basic principles of governance, mitigating the effect of the agency problem. The primary objective of this study was to ascertain... -
Measuring the asymmetry level around quarterly reports in the Dow Jones, Nasdaq, and Standard & Poor’s: Before and during the COVID-19 pandemic
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Jaime González Maiz Jiménez --- , Mexico Adán Reyes Santiago --- , Mexico Francisco López-Herrera --- , MexicoThis study tests investors’ asymmetry level around the quarterly reports of 47 shares from 2010 to the second quarter of 2020. This asymmetry level was determined by analysing three measures: the Corwin and Schultz’s (2012) spread level, residual sum of... -
Non-nutritive sweeteners: consumer awareness and inclusion in food and beverage products in South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Shakun Naicker --- Durban University of Technology, South Africa Ashika Naicker --- Durban University of Technology, South Africa Evonne Singh --- Durban University of Technology, South Africa -
Rayleigh quotients of Dillon’s functions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Aditi Kar Gangopadhyay --- Indian Institute of Technology Roorkee, India Sugata Gangopadhyay --- Indian Institute of Technology Roorkee, India Mansi Goyal --- Indian Institute of Technology Roorkee, India Aleksandr Kutsenko --- Novosibirsk State University, Russia Bimal Mandal --- Indian Institute of Technology Jodhpur, IndiaThe Walsh-Hadamard spectrum of a bent function uniquely determines a dual function. The duality mapping is the only isometric mapping on the set of bent functions apart from its automorphisms that preserve bentness. The Hamming distance between a bent function... -
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...