Author:Schwegmann, CP; Kleynhans, W; Salmon, BP; Mdakane, LDate:Jul 2015The Maritime Domain Awareness initiative seeks to constantly improve the ways in which maritime information is collected. With the recent release of free Sentinel-1 imagery to the public, monitoring the maritime environment has become a more ...Read more
Author:Akpakwu, GA; Hancke, GP; Abu-Mahfouz, Adnan MIDate:Feb 2020With the emerging applications of the Internet of Things (IoT), a congestion control mechanism becomes a critical phenomenon for efficient communication in networks of constrained devices. The Internet Engineering Task Force developed the ...Read more
Author:Fatoki, OS; Awofolu, OR; Genthe, BettinaDate:Oct 2004Trace levels of Cd were determined in Umata River which may affect human health. The levels of Zn were also determined since Zn can provide partial protection against the toxic effect of Cd in humans. The levels of Cd varied between trace and ...Read more
Author:Ngulube, T; Gumbo, JR; Masindi, Vhahangwele; Maity, ArjunDate:Oct 2018The ability of calcined magnesite for Methylene Blue (MB), Direct Red 81 (DR81), Methyl Orange (MO) and Crystal Violet (CV) dye removal was evaluated in this study. The experiments were designed to test the hypothesis that alkaline earth ...Read more
Author:Maritz, J; Krieg, HM; Yeates, CA; Botes, AL; Breytenbach, JCDate:Oct 2003Resting cells of the yeast Rhodosporidium toruloides (UOFS Y-0471) were immobilized in calcium alginate beads for the enantio selective kinetic resolution of racemic-1,2-epoxyoctane. The initial activity exhibited by immobilised cells was ...Read more
Author:Gaigher, LDate:1977Corrosion factors for boilers were calculated for some South African coal product samples using Borio's formula in which "accessible" alkalies were replaced by the total alkalies from the ash analysis.Read more
Author:Nickless, A; Scholes, RJ; Archibald, SDate:01 Sep 2010Often researchers are interested in obtaining estimates of variables which are quite difficult or expensive to measure. To obtain these estimates, relationships between those variables of interest and more easily measured variables are used. ...Read more
Author:Roux, Michael P; Taute, ADate:Jul 2016The DER-rating method has been adopted as the national standard for the rating of road structures. This method is defects-based and involves the rating of defects on the various inspections items of road structures in terms of degree (D), ...Read more
Author:Lysko, Albert ADate:Jul 2008An efficient method of integration for far field calculations is derived. The method applies to the integrals arising from calculation of far field pattern with higher-order polynomial basis functions and moment method. The integral under ...Read more
Author:Kok, S; Botha, N; Inglis, MDate:Aug 2014Goldmann applanation tonometry (GAT) is a method used to estimate the intraocular pressure by measuring the indentation resistance of the cornea. A popular approach to investigate the sensitivity of GAT results to material and geometry ...Read more
Author:Roberts, David PDate:Jul 2017Bore-and-fill mining was implemented at a pilot site in Tau Tona mine’s shaft pillar on 97 level. Observations, scan data and measurements from this site were used to calibrate an inelastic numerical model of bore-and-fill mining within the ...Read more
Author:de Ponte, JD; Pieterse, JJ; Bidgood, Peter MDate:May 2016In order to meet the increasingly stringent requirements for wind tunnel balances, as expressed by the wind tunnel testing community, balance design philosophy needs to be further expanded to include alternative sensor, material, design and ...Read more
Author:Griffith, Derek J; Bone, Emma L; Thomalla, Sandy J; Bernard, StewartDate:Jul 2018A multi-excitation fluorometer (MFL, JFE Advantech Co., Ltd.), originally designed to discriminate between phytoplankton species present within a population, has been redirected for use in fluorescence quantum yield (FQY) determination. While ...Read more
Author:Mahachi, J; Khanye, L; Goliger, Adam MDate:Sep 2007The current South African Code of Practice for structural use of masonry uses four partial safety factors gm, for materials depending on construction control and quality control. With the boom in the construction industry, new entrants in the ...Read more
Author:VdM Steyn, WJ; Anochie-Boateng, Joseph; Fisher, C; Jones, D; Truter, LDate:Sep 2012Accelerated Pavement Testing (APT) has always been conducted with the objective of improving the understanding of real pavements under real traffic and environmental conditions. While APT provides an accelerated view of some of the major ...Read more
Author:Nokes, WA; Harvey, JT; Du Plessis, L; Long, F; Stolarski, PJDate:Aug 1997By combining the results of both the HVS and laboratory tests, interpretations of pavement performance are described and recommendations for pavement design and construction have been made to Caltrans.Read more
Author:Eddy, C; de Saxe, Christopher C; Cebon, DDate:Aug 2018Heavy Goods Vehicles (HGVs) are overrepresented in cyclist fatality statistics in the UK relative to their proportion of total traffic volume. In particular, the statistics highlight a problem for vehicles turning left across the path of a ...Read more
Author:De Saxe, Christopher; Berman, Robert J; Clarke, Anria; Reinecke, John DDate:Jul 2019Tyre parameterisation is fundamental to vehicle dynamics research, as tyre properties have a significant impact on the behaviour of a vehicle. One way in which some of the primary tyre parameters can be extracted is a trailer-based tyre tester, ...Read more
Author:Vhengani, LM; Griffith, D; Lysko, MDate:Jul 2011The importance of calibrating satellite imagers has been explained in literature such as K Arai (2007) and K J Thome (2001). Calibration of satellite sensors (imagers) is crucial for data consistency, reliability and comparability. To perform ...Read more
Author:Green, JJ; Bosscha, Peter A; Candy, L; Hlophe, K; Coetzee, S; Brink, SDate:Sep 2010Safety in mines is of paramount importance, especially in the labour intensive operations of South Africa, where upward of 300 000 people are employed on a daily basis in an environment that is inherently dangerous. On average approximately ...Read more