Author:Von Wolff, WTEDate:1969Three coal samples, with abrasiveness indices of 533, 779 and 142 iron eroded, respectively, were heated 350 C in a current of air to remove carbonaceous material.Read more
Author:Mothosi, KL; Chikosha, Silethelwe; Madyira, DM; Chikwanda, Hilda KDate:Jan 2017Manufacturing processes typically produce residual stresses. The residual stresses can be advantageous when they are compressive and detrimental when tensile. In roll compaction of metal powder, similarly to rolling solid metals, substantial ...Read more
Author:Kunstmann, FH; Muller, EFEDate:1957Aluminium oxide , among other substances, is used as a "structural promoter" in iron catalysts. Following method makes possible the determination of the relatively small amounts of aluminium in iron catalysts.Read more
Author:Bandyopadhyay, J; Ray, SSDate:May 2011The poly(ethylene terephthalate)/thermotropic liquid crystal polymer (weight ratio 80:20) blend composites with two different weight percentages of nanoclay were prepared using a twin-screw extruder. The frequency sweep experiments at a ...Read more
Author:Bonapace, AC; Du Toit, PDate:1976This report aims to investigate coal in its various stages of mechanical handling during the processes of winning, preparation and utilization, and how it causes wear of the metal surfaces with which it makes contact. And presents basic ...Read more
Author:Petrick, AJDate:1958'The agreements between the collieries supplying blend coking to Iscor provide for the purchase of this coal in the air-dry condition. Therefore, weight-bridge tonnages must be converted to tons of air-dry coal.Read more
Author:Meintjies, AADate:1971This report contains details regarding the composition of the gaseous decomposition products formed when coal is pyrolysed at a fast rate.Read more
Author:Mahlangu, Vusi J; Ndibewu, PP; Pretorius, Cecilia JDate:Sep 2016The focus of the entire project is to characterize diesel particulate matter from various mining commodities into its respective constituents and to further evaluate and outline the possible identified markers for better health engineering ...Read more
Author:Fakude, PM; Erasmus, C; Taylor, JRNDate:Feb 2006One of the major problems that affect maize quality is insect infestation of stored products. Currently, this problem is controlled by the use of chemical pesticides. Methyl bromide, the pesticide with the widest application, is being phased ...Read more
Author:Gurtunca, RG; Adams, DJDate:Mar 1991In situ measurements and numerical modelling based on elastic theory showed that backfill stresses are considerably higher than originally thought. This has led to a change in understanding of rockmass behaviour. After describing previous ...Read more
Author:Chawanda, A; Roro, Kittessa T; Auret, FD; Mtangi, W; Nyamhere, C; Nel, J; Leach, LDate:May 2011The authors have studied the experimental linear relationship between barrier heights and ideality factors for palladium (Pd) on bulk-grown (1 1 1) Sb-doped n-type germanium (Ge) metal-semiconductor structures with a doping density of about ...Read more
Author:van Zyl, JGDate:1974In investigations concerned with the reduction of exhaust smoke of diesel engines, it was required to calculate the volume of a given mass of petrol at high temperatures.Read more
Author:Singh, A; Karsten, AE; Mputle, I; Chetty, A; Naidoo, KerschDate:Jul 2009Poly(N-isopropylacrylamide) that is PNIPAAm is a temperature sensitive smart material which displays a lower critical solution temperature (LCST) at 33-35oC. At the lower critical solution temperature, the gel changes from hydrophilic to ...Read more
Author:Singh, A; Karsten, AE; Smith, RMDate:Jan 2010Non-invasive methods offer a great advantage over more conventional medical methods but many studies need to be done before such methods become easily accessible and usable. Many of these non-invasive methods are dependant on the interaction ...Read more
Author:Motaung, DE; Malgas, GF; Arendse, CJ; Mavundla, SEDate:Aug 2012Well crystallized flower-shaped ZnO-structures composed of a perfectly hexagonal-shaped ZnO structure were successfully synthesized using a simple microwave assisted hydrothermal method. The NPs with a hexagonal stem and a tapering tip grows ...Read more
Author:Güler, G; Kuijpers, JS; Wojno, L; Milev, A; Haile, ADate:Mar 2001The main objective of this project was to determine the support capacity of various support systems and components under dynamic loading conditions. Deficiencies in the performance of fabric support were highlighted in these and other ...Read more
Author:Kirsten, JTDate:Jul 1994The primary objective of this work is to assess the feasibility of reliably simulating the coal dust explosion process taking place in the Kloppersbos tunnel with a computer model. Secondary objectives are to investigate the viability of ...Read more
Author:Oberholzer, JW; Esterhuize, GS; Van Vuuren, PJ; Madden, BJ; Van der Merwer, JNDate:Jul 1997This report summarizes the findings of the work conducted to determine the need to research the time dependent decay of coal mine bord and pillar workings. It is intended for use by the relevant SIMRAC committee as background information to ...Read more
Author:Sibolla, Bolelang H; Van Zyl, T; Coetzee, SDate:Nov 2020Transient spatiotemporal events occur within a short interval of time, in a particular location. If such events occur unexpectedly with varying durations, frequencies, and intensities, they pose a challenge for near-real-time monitoring. ...Read more