Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 3670-3689 of 3764
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Vaccinium exul
(South African National Biodiversity Institute, 2015) -
Validating smartphone-collected speech corpora
(SLTU, 2012)We investigate the effectiveness with which the accuracy of a prompted speech corpus can be validated when minimal additional speech resources are available, and specifically when a language model in the target language ... -
Validation of a scale measuring the relationships between long-term orientation, political orientation, environmental purchase intentions and green purchase behaviour
(The Social Sciences Research Society, 2016)This paper outlines the procedure undertaken to validate a scale measuring the relationships between long-term and political orientation, and environmental intentions and behaviour as a four dimensional structure in the ... -
Validation of the antiproliferative effects of Euphorbia tirucalli extracts in breast cancer cell lines
(Springer, 2016)Medicinal plant extracts have recently attracted attention of modern medical science research due to their non-lethal activity. Currently, up to 50% of the world drugs including chemotherapeutic drugs such as taxol and ... -
Validation of the short self–regulation questionnaire in a group of black teachers: the SABPA study
(AOSIS, 2013)Orientation: Recent literature has emphasised the important role that self-regulation plays in the mental health of individuals. The lack of a validated psychometric instrument to accurately measure self-regulation amongst ... -
Validation of the short self–regulation questionnaire in a group of black teachers: the SABPA study
(AOSIS, 2013)Orientation: Recent literature has emphasised the important role that self-regulation plays in the mental health of individuals. The lack of a validated psychometric instrument to accurately measure self-regulation amongst ... -
Validation of using a modified BET model to predict the moisture adsorption behavior of bituminous coal
(Taylor & Francis, 2016)A good correlation exists between the amount of moisture adsorbed and the oxygen content of medium-rank B vitrinite-rich and medium-rank C inertinite-rich bituminous coal. Total mass moisture adsorbed per gram of coal ... -
Validation tests for semi-parametric models
(Taylor & Francis, 2015)Tests are proposed for validation of the hypothesis that a partial linear regression model adequately describes the structure of a given data set. The test statistics are formulated following the approach of Fourier-typ ... -
Valproic acid alters the content and function of the cell-free DNA released by hepatocellular carcinoma (HepG2) cells in vitro
(Elsevier, 2017)Background It has long been believed that cell-free DNA (cfDNA) actively released into circulation can serve as intercellular messengers, and their involvement in processes such as the bystander effect strongly support ... -
valuating derived vegetation indices and cover fraction to estimate rangeland aboveground biomass in semi-arid environments
(AJOL, 2017)This study was conducted to assess satellite data for quantifying and mapping the spatial distribution of rangeland biophysical parameters (aboveground biomass) from different geographic locations in the North West province, ... -
Value-focused assessment of ICT security awareness in an academic environment
(Elsevier, 2007)Security awareness is important to reduce human error, theft, fraud, and misuse of computer assets. A strong ICT security culture cannot develop and grow in a company without awareness programmes. This paper focuses on ICT ... -
Value-focused assessment of information communication and technology security awareness in an academic environment
(Springer, 2006)The aim of this paper is to introduce the approach of value-focused thinking when identifying information and communications technology (ICT) security awareness aspects. Security awareness is important to reduce human ... -
Vapor-liquid equilibria, density and sound velocity measurements of (water or methanol or ethanol + 1,3-propanediol) binary systems at different temperatures
(Elsevier, 2016)In this work, vapor liquid equilibria (VLE) data for the binary systems containing {water or methanol (1) + 1,3-propanediol (2)} are reported. All measurements were performed in the temperature range of (273.15-343.15 (or ... -
Variability of domestic burning habits in the South African Highveld: a case study in the KwaDela Township (April 2017)
(IEEE, 2017)Air quality in the South African low-income residential areas is poor due to gaseous and particulate emissions from a range of sources including domestic burning. The absence of data on fuel use and variability in low-income ... -
The variability of the proton cosmic ray flux on the sun's way around the galactic center
(Elsevier, 2008)The discovery of direct evidences for the acceleration of high energetic particles at the shell supernova remnant RXJ1713.7-3946 underlined the need to calculate the cosmic ray (CR) distribution in the Galaxy on a spatial ... -
Variable importance in latent variable regression models
(Wiley, 2014)The quality and practical usefulness of a regression model are a function of both interpretability and prediction performance. This work presents some new graphical tools for improved interpretation of latent variable ... -
Variable selection for binary classification using error rate p-values applied to metabolomics data
(BioMed Central, 2016)Background: Metabolomics datasets are often high-dimensional though only a limited number of variables are expected to be informative given a specific research question. The important task of selecting informative variables ... -
Variational approach and exact solutions for a generalized coupled Zakharov-Kuznetsov system
(Elsevier, 2017)In the present paper, we obtain a variational principle for a generalized coupled Zakharov-Kuznetsov system, which does not admit any Lagrangian formulation in its present form. The eminent Noether's theorem will then be ... -
A variational formulation approach to a generalized coulped inhomogenous emden–flowler system
(Taylor & Francis, 2014)We study a generalized coupled inhomogeneous Emden–Fowler system from the Lagrangian formulation standpoint. A special case of this system was considered in the literature, and necessary and sufficient conditions for the ... -
Variations in infectivity of indigenous rhizobial isolates of some soils in the rainforest zone of Nigeria
(Taylor & Francis, 2015)Nodule formation in legumes is a process that starts with root infection by rhizobia. The present study assessed the population and infectivity of the indigenous rhizobial strains in rainforest soils of Nigeria. Soils ...
