Author:Van Deventer, Heidi; Cho, Moses A; Lück-Vogel, Melanie; Van Niekerk, LaraDate:Jul 2016Wetland and estuarine vegetation is often difficult to detect and separate from adjacent land covers with multispectral sensors for a number of reasons. The spatial resolution of space-borne sensors is often insufficient for these features ...Read more
Author:Grobler, TL; Ackermann, ER; Van Zyl, AJ; Olivier, JC; Kleynhans, Waldo; Salmon, Brian PDate:2012Human settlement expansion is one of the most pervasive forms of land-cover change in South Africa. The use of Page’s cumulative sum (CUSUM) test is proposed as a method to detect new settlement developments in areas that were previously ...Read more
Author:Sithole, Bishop B; Watanabe, CDate:Sep 2013Defoamers are often used to control or reduce foam problems in a variety of pulp and papermaking processes. It has been recognised that non-judicious use of defoamers can lead to undesirable deposition problems. Amide-based defoamers have ...Read more
Author:Sithole, Bishop B; Pimentel, J; Gibbons, S; Watanabe, CDate:Oct 2012Understanding the cause of effluent toxicity is an important requirement for its prevention, remediation and return to compliance. One component of the strategy entails identification and fingerprinting of additives or components in additives ...Read more
Author:Alberts, R; Van der Merwe, AJ; Pretorius, HDate:Nov 2006Web Engineering methodologies, tools and techniques are based on research from four decades of best practices in Software Engineering. Over the past ten years, users with disabilities have entered the market with several initiatives from ...Read more
Author:De Klerk, HM; Gilbertson, J; Lück-Vogel, Melanie; Kemp, J; Munch, ZDate:Nov 2016Traditionally, to map environmental features using remote sensing, practitioners will use training data to develop models on various satellite data sets using a number of classification approaches and use test data to select a single ‘best ...Read more
Author:Munyati, C; Shaker, P; Phasha, MGDate:May 2011Healthy rangelands are of economic and biodiversity conservation importance in the savannas of northern South Africa. The proliferation of woody plant species on the rangelands, known as bush encroachment, constitutes a degradation of rangeland ...Read more
Author:Debba, PraveshDate:Sep 2008Statistics is the science pertaining to the collection, summary, analysis, interpretation and presentation of data. Some of the key questions in environmental studies are: where to sample, what to sample
and how many samples to obtain. ...Read more
Author:Naidoo, R; Sithole, Bishop B; Obwaka, EDate:Mar 2016The report focuses on optimisation of alkali catalysis as a process for producing biodiesel from waste cooking oils. Biodiesel production parameters that were optimised were methanol to oil ratio, catalyst concentration, reaction temperature, ...Read more
Author:Pauck, WJ; Venditti, RA; Pocock, J; Andrew, JEDate:2012Waste paper recycling in South Africa has grown to a respectable recovery rate of 43% in 2008. Pending legislation will further boost the recovery rate of recycled paper. Domestic household waste represents the major remaining source of ...Read more
Author:Hughes, DA; Gush, Mark B; Tanner, J; Dye, PDate:Feb 2013This study combines the application of a hydrological model with the use of field data derived from short period measurement campaigns at two sites, one a low topography forested area and the other a steep grassland catchment. The main objective ...Read more
Author:Masilela, Z; Pereira, JDate:Jun 1998External coatings on buried pipelines offer the first line of defence against corrosion with cathodic protection systems in place to protect bare metal at coating defects. Holiday detection, before pipe laying, does not guarantee pipelines ...Read more
Author:Van Deventer, Heidi; Nel, J; Maherry, A; Mbona, NDate:Nov 2014Hydrogeomorphic approaches to wetland classification use landform classes to distinguish wetland functionality at a regional scale. Space-borne radar technology enabled faster regional surveying of surface elevations to digital elevation ...Read more
Author:Maswanganye, SE; Dube, T; Jovanovic, Nebojsa; Kapangaziwiri, Evison; Mazvimavi, DDate:Dec 2022Study region: The Touws River in the Klein Karoo region of South Africa. Study focus: This study sought to improve the understanding of pool dynamics along non-perennial rivers (NPRs) by utilising the water balance approach to assess the water ...Read more
Author:De Beer, Morris; Maina, JWDate:2011Simple tire-pavement contact analysis reveals that higher contact stresses from truck tires could result in increased potential for road pavement failures.Read more
Author:Manase, G; Nkuna, Z; Ngorima, EDate:Sep 2009South Africa is faced by a number of challenges that include low water and sanitation coverage in rural and peri-urban areas, high unemployment and increasing inequality between the rich and the poor as indicated by a Gini coefficient of 0.77; ...Read more
Author:Shoke, L; Sono, TJ; Olubambi, PADate:Apr 2013The aim of this study was to develop an in-house tensile testing procedure that would yield accurate and reproducible parameters as input material properties into computational models for numerical simulations of the mechanical behaviour of ...Read more
Author:Whillier, ADate:Apr 1953Design curves based on measurements of solar irradiation in South Africa are presented for two geographic areas, the highveld and the Cape Peninsula, giving data on the amount of thermal energy that can be collected from the sun by use of ...Read more