Author:Geldenhuys, CJ; Knight, RS; Russel, S; Jarman, MLDate:1988This report lists and defines attributes (both functional and structural) that have been used in other structural classifications of forest vegetation. Field techniques are summarized. The recommended use of each attribute and technique is ...Read more
Author:Sevenster, PGDate:1958It was found necessary to conduct the investigation described in this paper when information on diffusion coefficients of some strongly adsorbed gases was required in the course of other studies on coal at the Institute.Read more
Author:Greyling, T; Huntley, BJDate:Dec 1984This Directory provides detailed information on 155 conservation areas of greater than 1 000 ha administered by government and statutory bodies in the Republics of South Africa, Transkei, Bophuthatswana, Ciskei and Venda, and the Kingdoms of ...Read more
Author:Solsona, FDate:1990This guide will present some disinfection systems, which will be useful in supporting disinfection programmes. The description of the different systems will provide a guideline for the selection of equipment base on balancing the simplicity ...Read more
Author:Brooks, GRDate:Apr 1977This survey of current practice relating to the disposal and recycling of waste paper was commissioned by the Committee for Solid Wastes, through the National Scientific Programmes Unit of the CSIR. It was undertaken by Louis Heyl and Associates, ...Read more
Author:Cowling, RM; Le Maitre, David C; McKenzie, B; Prys-Jones, RP; Van Wilgen, BWDate:1987This volume comprises invited review and research papers dealing with the effects of disturbance on the dynamics of fynbos biome communities. Since fire is the most important disturbance factor in the biome, most contributions concentrate ...Read more
Author:Cooper, Antony K; Eloff, C; Schmitz, PMUDate:Aug 2010This position paper was drafted shortly after the first meeting of the Committee for Spatial Information (CSI), because it was obvious from that first meeting that most of the members of the CSI had little knowledge of spatial data infrastructures ...Read more
Author:Bonapace, ACDate:1971The drag coefficient of a solitary particle when moving relative to a fluid, when rising or falling vertically in a stationary fluid, is a well-known function of the particle Reynolds number.Read more
Author:Heim, FC; Van Doornum, GAWDate:1973A ford Trader diesel engine was operated on the dual fuel system, using diesel oil and methane. A considerable reduction in smoke generation and power loss could be obtained under operation at high altitude by replacing approximately 25% of ...Read more
Author:Van Rensburg, NJJDate:Dec 1972The use of titanium tetrachloride and antimony oxide as flame-retarding agents for cotton was investigated.Read more
Author:Ferrar, AADate:1989This document contains the proceedings of a workshop which was convened to debate the ecological flow requirements of South African rivers. Topics which are discussed include the influence of weirs and impoundments, the quantity requirements ...Read more
Author:Gandar, MVDate:Nov 1983An annotated checklist is given of 60 species of Acridoidea which were found on the Nylsvley Nature Reserve. The density of a species may change greatly over small distances, altering the population species composition. Vegetation structure ...Read more
Author:O'Keeffe, JHDate:1986Ecological research on South African rivers has progressed in a number of phases. Until 1950 work was mainly taxonomic and descriptive, an essential prerequisite for more detailed studies. The realisation that South African rivers, a vital ...Read more
Author:Wehmeyer, ASDate:Aug 1986Transporting fresh material, with as little deterioration as possible from the field to the laboratory is always a problem. This is especially the case with soft fruits which are easily bruised and leaves which quickly lose moisture. Fruits ...Read more
Author:Grindley, JRDate:Dec 1982This report provides historical information on Eerste River, catchment, abiotic and biotic characteristics. The Eerste River rises on Dwarsberg 60 km east of Cape Town as the head of Jonkershoek. The river catchment covers the eastern part ...Read more
Author:Savage, WHDDate:1969No corresponding determination were made on the same samples at the two temperatures, so that no valid comparison can be made.Read more
Author:Muller, EFEDate:1963The aim of this investigation is to examine at least two other coking coals which, however, differ appreciably in their coking properties as determined in the laboratory.Read more
Author:Van Eck, B; Savage, WHDDate:1951In the present investigation samples of approximately cobble sized coal from five typical collieries in the major coal fields were taken.Read more
Author:Muronga, KhangweloDate:Feb 2017The Naturalistic Driving Studies (NDS) are research methods that have the ability to improve existing methods for collecting data about driver performance and driver behaviour in normal driving conditions. The purpose of this research is to ...Read more
Author:Savage, WHDDate:1950The work incorporated in this report was undertaken because of the introduction of new grading regulations governing the export of col from the Union, in which minimum analytical requirements for the several grades of coal were laid down.Read more