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Effect of irrigation scheduling on leaf yield of non-heading Chinese cabbage
(Brassica rapa L. subsp. chinensis) Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. van Averbeke --- , C. Netshithuthuni --- ,A field experiment conducted on the Dzindi canal irrigation scheme in the north of South Africa demonstrated that non-heading Chinese cabbage (Brassica rapa L. subsp. chinensis) needed to be irrigated at least twice per week to maintain the water content... -
A new line search technique
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: T.A. Adewale F.M. AderibigbeIn this paper the problem of line search, an important step in most multidimensional optimization algorithms, is considered. If conjugate gradient descent is to be used in producing a descent sequence for a given functional f on a Hilbert space... -
TOPOLOGICAL QUASIGROUPS
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Phullendu Das --- Department of Mathematics, INDIAA semitopological quasigroup is defined and certain conditions are found under which a semitopological quasigroup is a topological quasigroup. Some properties of topological quasigroups are obtained. It is proved that (i) a realvalued continuous function defined on a compact subset... -
A Comparison of the General Anti-Avoidance Provisions in the Australian and South African Income Tax Acts With Reference to Whether or Not the South African Anti-Avoidance Provisions Would Have Been Applicable to the Facts of FCT v Spotless Services Limited
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: D A Warneke --- Department of Accounting (Tax Section),The decision of the Australian Courts in the case of FCT v Spotless Services Limited was cause for considerable concern among the ranks of the Australian tax fraternity. The decision hinged on an application of the general anti-avoidance provisions (contained... -
Utilisation of staff clinic facility in a Northwest Nigeria hospital: emerging challenges for the National Health Insurance Scheme
Item type: Journal Article • Journal: South African Family Practice • Authors: GC Michael --- Department of Family Medicine, Nigeria BA Grema --- Department of Family Medicine, Nigeria SO Yakubu --- Department of Family Medicine, Nigeria I Aliyu --- Department of Paediatrics, NigeriaBackground: The health status of workers and their families affects workplace productivity. The National Health Insurance Scheme (NHIS) objective of improving healthcare accessibility to Nigerians has increased service utilisation but may pose new challenges to existing facilities. This study was... -
Section 12M contributions in terms of the Income Tax Act No. 58 of 1962: Normal tax implications for the retired employee
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: E van Wyk --- School of Accountancy, Faculty of Economic and Management Sciences, M Terblanche --- Ducharme Consulting, South AfricaSection 12M of the Income Tax Act No. 58 of 1962 allows a normal tax deduction for employers who pay the post-retirement medical contributions by way of lump sum payments on behalf of retired employees. Although a full deduction is... -
Comparative assessment of technical efficiencies of irrigated crop production farms: A case study of the large-scale Kampe-Omi irrigation scheme, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bashir Adelodun --- , Daegu, Korea Abdulwaheed Adedayo Mohammed --- , Ilorin, Nigeria Kamoru Akanni Adeniran --- , Ilorin, Nigeria Sheu-Usman Oladipo Akanbi --- , Ilorin, Nigeria Taofeeq Sholagberu Abdulkadir --- , Ilorin, Nigeria Kyung Sook Choi --- , Daegu, KoreaThe technical inefficiencies of crop production system in terms of large-scale irrigation schemes are major problems attributed to the underperformance of crop farms. Therefore, the aim of this study was to estimate and compare farm-level technical efficiencies of four major... -
Analysis of farmers’ food price volatility and Nigeria’s growth enhancement support scheme
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Joseph I. Uduji --- , Nigeria Elda Nduka Okolo-Obasi --- , Nigeria Simplice Anutechia Asongu --- , CameroonFood prices in Nigeria have become significantly higher and more volatile since 2012. The purpose of this research was to find out what affects farmers’ participation in the growth enhancement support scheme (GESS) in the country. We determined the effect... -
The taxation of gap cover policies for individual taxpayers in South Africa: a critical analysis
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Petro Gerber --- , South Africa Cecileen Greeff --- , South AfricaGap cover policies cover the shortfall between medical scheme benefits and the rates the service providers charge and are therefore used by individuals in South Africa to supplement payments of medical expenditure not covered by private medical schemes. Little information... -
The monoidal nature of the Feistel-Toffoli construction
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Hans-E. Porst --- Stellenbosch University, South AfricaThe Feistel-Toffoli construction of a bijective Boolean function out of an arbitrary one, a fundamental tool in reversible computing and in cryptography, has recently been analyzed (see [12]) to be a special instance of the construction of a monoid homomorphism... -
A fully discrete scheme on piecewise-equidistant mesh for singularly perturbed delay integro-differential equations
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Musa Cakir --- Van Yuzuncu Yil University, Turkey Baransel Gunes --- Van Yuzuncu Yil University, TurkeyThis paper chiefly takes into account the singularly perturbed delay Volterra-Fredholm integro-differential equations by numerically. In this context, firstly, priori estimates are given and a new discretization is constructed on piecewise-equidistant mesh by using interpolating quadrature rules [2] and composite... -
The maximum norm error estimate and Richardson extrapolation methods of a second-order box scheme for a hyperbolic-difference equation with shifts
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Dingwen Deng --- Nanchang Hangkong University, China Zhu-an Wang --- Nanchang Hangkong University, China Zilin Zhao --- Nanchang Hangkong University, ChinaThe study aims at the development and theoretical analyses of a box method used to solve a kind of hyperbolic equations with shifts. By using the discrete energy method, it is shown that numerical solutions converge to exact solutions with...