Author:Scott, DFDate:2000Certification has been responsible for a very large improvement in the standard of forest management in South Africa. The reasons for the positive role of certification are set out briefly below. Firstly, and most importantly, certification ...Read more
Author:Ecosystem ProgrammesDate:Dec 1982The National Programme for Environmental Sciences is a cooperative undertaking of scientists and scientific institutions in South Africa concerned with research related to environmental problems. This annual report describes the rationale, ...Read more
Author:Prozzi, JA; Sanders, PJ; du Toit, GD; De Beer, MorrisDate:26 May 2009This report describes a new methodology for the determination of Equivalent Damage Factors (EDFs) of vehicles with multiple axle and wheel configurations on pavements. The basic premise of this new procedure is that "equivalent pavement ...Read more
Author:Gass, BG; Ventura, DFC; De Beer, MorrisDate:Mar 1993The use of stabilised layers is cost effective in road construction in South Africa. Some stabilised materials have however been found to be susceptible to erosion. To identify erodible materials the Erosion Test was developed in 1989. ...Read more
Author:Schutte, ICDate:Mar 2000Road traffic collision result in both human loss and cost to the company. Government and other role players addressing this problem require reliable information on the cost of collisions to the economy. Collisions costs are also used in the ...Read more
Author:Erasmus, TC; Du Plessis, HSLDate:1963The objective of the report was to ascertain the order of the residence time distribution within the Drewboy washer.Read more
Author:Vogel, F; Steyn, WJvdMDate:Mar 2000The report focuses on aspects such as possible wireless data transmission, standardization and mesurement methodologies and sensor technology. Various avenues are explored for the development of sensors while new emerging technologies that ...Read more
Author:Hemp, DADate:May 1992This report is concerned with the analysis data from three sites during mining with and without backfill, in order to determine the effect that backfill on regional seismicity. Since the geology and stress fields in any two areas used for ...Read more
Author:Maneylaws, A; Norman, G; von Glehn, FHDate:Dec 1997An extensive literature review of international work of mining equipment noise control has been carried out. The sources of noise on percussion rock drills, continuous miners, dust scrubbers and fans, long wall machinery and trackless vehicles ...Read more
Author:Mitchell, MF; Semmelink, CJ; McQueen, ALDate:Jun 1977For some time road engineers have been concerned that the variability inherent in road construction materials and their sampling and testing has not been logically and consistently catered for in the road construction process or in construction ...Read more
Author:Erasmus, TCDate:1962The raw coal brought to the plant was reduced to minus three inches. The minus coal was passed over screens to eliminate minus 1/4 inch fines and -3 inch +1/4 inch coal was stored in service bunkers in the pilot plant building.Read more
Author:Erasmus, TC; Du Plessis, HSLDate:1963The raw coal brought to the pilot plant was reduced to minus three inches. The minus three inch coal was passed over screens to eliminate minus 1/4 inch fines.Read more
Author:Ngidi, MDate:Dec 2014Former homelands were established in order to create separate self-governed states for the black population of South Africa, the epitome of the Apartheid government policy of separate development and social engineering. After 1994 these areas ...Read more
Author:Sevenster, PGDate:1969In planning research projects in connection with coal dust explosion hazards, it must be borne in mind that explosions take place in tow stages, viz.Read more
Author:Savage, WHDDate:1965The intention to specify at least two grades of anthracite will probably result in more samples being received which are outside the specification of the grade applying to the coal.Read more
Author:Cooper, Antony KDate:Jul 2016This thesis presents an analysis of the nature of volunteered geographical information (VGI) and on its applicability for use in a spatial data infrastructure (SDI) to supplement official and commercial sources, particularly given the ease ...Read morecb
Author:Moodie, BDate:1972The influence of severe oxidation on bright coal particles by the application in the presence of oxygen is fairly well known. In this study an attempt was made to establish the connection between the deterioration of swelling properties and ...Read more
Author:Jezko, JDate:1974The atmosphere of an insert gas below its critical temperature has little effect on the vapor pressure of liquids and solids that may be associated with it, but on the raising the temperature of the gas a remarkable increase in the vapor ...Read more