Author:Mashaba, Nikiwe P; Griffith, DJDate:Nov 2020Near infrared detectors have gained popularity, mainly in the military, because of their capability of detecting wildfires. The Council for Scientific and Industrial Research (CSIR) focuses on the development and deployment of wildfire detectors ...Read more
Author:Anochie-Boateng, Joseph; Tutumluer, EDate:Nov 2010Oil sand is a generic name given to natural deposits of bituminous sand materials that are mined for crude oil production. These materials are currently used as subgrade materials of temporary and permanent roads in oil sand fields for operating ...Read more
Author:Anochie-Boateng, Joseph; Tutumluer, EDate:Jun 2010The routine operations of large capacity off-road construction equipment on fine-grained cohesive soils have become a concern to the construction and equipment manufacturing sectors due to problems with mobility on these soils. In this study, ...Read more
Author:Landmann, TDate:Jul 2003Burn severity was quantitatively mapped using a unique linear spectral mixture model to determine sub-pixel abundances of different ashes and combustion completeness measured on the corresponding fire-affected pixels in Landsat data. A new ...Read more
Author:Matthews, MW; Bernard, StewartDate:Sep 2013Characterizing the specific inherent optical properties (SIOPs) of water constituents is fundamental to remote sensing applications. Therefore, this paper presents the absorption properties of phytoplankton, gelbstoff and tripton for three ...Read more
Author:Roy, DP; Landmann, TDate:10 Oct 2005The relationship between changes observed in multi-temporal remotely sensed data and disturbance processes are increasingly being studied in support of various land process modelling and management decision applications. The possibility of ...Read more
Author:Hunter, Lawrance; Smuts, S; Botha, Anton FDate:Jun 2013The objectives of this research were to determine and define the characteristics of visually “objectionable medullated” (i.e., “kemp type”) fibers and “nonobjectionable medullated” fibers in mohair and to establish which characteristic(s) ...Read more
Author:Anochie-Boateng, Joseph; Tutumluer, EDate:May 2009Oil sand materials are natural bituminous sand deposits that are rich in bitumen or asphalt content to the extent that oil can be extracted from these deposits. The presence of high viscous bitumen content in the oil sand composition makes ...Read more
Author:Opoku, F; Govender, Krishna; Van Sittert, GCGE; Govender, PPDate:Oct 2017n the 21st century, the growing demand of global energy is one of the key challenges. The photocatalytic generation of hydrogen has attracted extensive attention to discuss the increasing global demand for sustainable and clean energy. However, ...Read more
Author:Louw, DFDate:Nov 2015The build rate of a laser powder bed fusion machine can be increased by increasing the laser power. The current paper shows that the use of higher laser power results in a positive change in impact toughness of Ti6Al4V. Laser powder bed fusion ...Read more
Author:Funke, Nicola S; Claasen, MariusDate:Oct 2017The specific mission supported by this Road Map is: “Unlocking South Africa’s maritime potential through research, development and innovation". The mission supports the following overarching vision: “By 2030 South Africa is globally recognised ...Read more
Author:Murray, K; Wade, PDate:Jan 1996The factors affecting the sound application of an anion-cation balance check to water quality analyses are investigated. It is shown that the carbonate contribution to the total negative charge (in meq/l) is satisfactorily calculated from the ...Read more
Author:Tarboton, WRDate:Sep 1977A provisional avifaunal checklist based on observations made during the period September 1974 to July 1976 is presented. Of 325 species recorded, 197 are classified as resident, 64 as migrant, 14 as sporadic, 13 as vagrant while 37 are of ...Read more
Author:Bello, A; Makgopa, K; Fabiane, M; Dodoo-Ahrin, D; Ozoemena, KI; Manyala, NDate:Oct 2013Few-layer graphene was synthesized on a nickel foam template by chemical vapor deposition. The resulting three-dimensional (3D) graphene was loaded with nickel oxide nanostructures using the successive ionic layer adsorption and reaction ...Read more
Author:Maharaj, ADate:Jun 2012The dispersivity of clay soils in water and its influence on the stability of engineered structures has been a topic of serious concern in civil projects for many years. One of the main problems is the difficulty in positively identifying ...Read more
Author:Pretorius, PJ; Linder, PW; Slabbert, JL; Wade, PWDate:Sep 2001Observed mortalities of Daphnia pulex exposed to a single concentration of zinc in different test waters are explained in terms of the chemical behaviour of zinc in solution, as predicted by chemical speciation modelling. Multivariate correlation ...Read more
Author:Nabarro, FRNDate:15 Aug 1997The author provides a brief overview of the chemical driving forces for rafting in superalloys. Until recently, all theories of the driving force for rafting have considered the compositions of the two phases to be fixed, although accepting ...Read more
Author:Musee, NDate:Jan 2012Nanotechnology is envisaged to address present human needs and secure living comforts of future generations cheaply, faster and more cleanly. To date, nanotechnology's impact on the economy and on our daily lives has been enormous.Read more
Author:Nonjola, Patrick NT; Mathe, Mahlanyane K; Hietkamp, SDate:Dec 2008Synthesis and characterization of anion-exchange membranes (AEMs) using polysulfones is described. The modification process of polysulfones involves two steps: Firstly, by introducing chloromethyl groups followed by quaternization reaction ...Read more
Author:Weideman, E; Van der Walt, LTDate:Jan 1978The relative importance of various parameters such as temperature, concentration and treatment time on the chemical softening and bleaching of phormium fibre, has been investigated on a pilot scale.Read more