Author:National Building Research InstituteDate:Sep 1981Energy is becoming increasingly expensive. Conservation can offset the increase in energy cost and can therefore be considered a new and can fairly inexpensive source of energy. The following article looks at the ways in which energy savings ...Read more
Author:Schoeman, FRDate:1982Durring the year 1972 to 1975 samples of benthic algae were collected from 22 selected river stations in the Juskei-Crocodile river system. Some 250 diatoms taxa were identified from these samplesRead more
Author:Dreyer, JJ; Wehmeyer, ASDate:Jan 1982The use of the caterpillar of the Mopanie moth (Conimbrasia belina) as a food by the Pedi nation has been described in detail by Quin, who also recorded data on the average weight and moisture, protein and fat contents of the fresh caterpillars. ...Read more
Author:Johannsen, ADate:Nov 1982Principles of the operation of air-heating collectors are discussed. The fundamental differences between the design principles of air-heating as opposed to water-heating collectors are highlighted. The main requirement is the transfer of heat ...Read more
Author:Ashton, PJ; Schoeman, FRDate:1983The Pretoria Salt pan is shallow and alkaline with pronounced mesothermy at a depth of between 0.55 and 0.7 metres. Secchi disc transparencies ranged from 7 to 19 cm. Endorheic or closed drainage basins are widely distributed in many climate ...Read more
Author:Joshnson, CTDate:1983A description for the flora is given. The anther is characterized by a prominent oil gland at the tip of the connective. The structure of the seed coat of the fertile and sterile seed differs. Most of the integumental tissue is destroyed ...Read more
Author:Wentzel, JD; Kok, R; Lewis, MI; Meese, GBDate:Aug 1983Discuss the indoor temperature ranges found acceptable by occupants of buildings controlled by passive means, in areas where the influence of land mass dominates the local climateRead more
Author:Malcolm, HGDate:1984This paper deals with the diatoms flora of the Hog's Back region of the Amatola Mountains in the Eastern Cape Province, South Africa. These mountains form part of the Great winterberg Range which constitutes a portion of the escarpment of the ...Read more
Author:Basson, FA; Jammine, E; Heyl, LDate:1984A research and demonstration project on the use and performance of low cost integral solar water heaters in urban low-income dwellings was carried out in 1982/83. The project involved technical and socio-economic components. This report ...Read more
Author:Archibald, REM; Schoeman, FRDate:1984Amphora coeffeaeformis (Agardh) Kutzing is frequently found in brackish water. However, different concepts of this species found in the literature lead to confusion with respect to its true identity. In this study Agardh’s type material from ...Read more
Author:Schoeman, FR; Archibald, REM; Ashton, PJDate:12 Mar 1984This is the third and final contribution on the diatom flora recorded in the vicinity of the pretoria salt pan. In the taxonomic section notes and illustrations (light and electron microscopy) are given for 19 of the 35 listed species.Read more
Author:Van Den Broek, GJDate:May 1984A computer program, developed to predict the separation characteristics of external stores after release from the carrier aircraft, is discussed The aircraft is represented by panel singularity distributions along the line of Woodward's USSAERO ...Read more
Author:Van Den Broek, GJDate:Jul 1984The effect of aircraft wind modelling on the external store loads is investigated by computing that effect for the external flow field generated by the wing. The application of the panelling /boundary condition method to the perturbation flow ...Read more
Author:Tinley, KLDate:1985A synthesis is presented on the ecology of South African coastal dune ecosystems, which comprise about 80% of South Africa's 3 000 km shoreline.
A detailed description of the extent, structure and functioning of these ecosystems is given. ...Read more
Author:Geldenhuys, CJDate:1985Annotated references to 519 publications are presented, together with keyword listings and keyword, regional, place name and taxonomic indices. This bibliography forms part of the first phase of the activities of the Forest Biome Task Group.Read more
Author:Huntley, BJDate:1985The development of the world's largest open-cast uranium mine in the Namib Desert introduced rapidly increasing demands for water to the area in the early 1970's. In the absence of scientifically based information on the likely impact of water ...Read more
Author:Bruton, MN; Merron, SVDate:1985A list of references to research and records of alien and translocated aquatic animals in southern Africa is given, as well as a general introduction to the problem of invasive aquatic animals. Reference is made to 5&7 publications. The genera ...Read more
Author:Hall, AV; Veldhuis, HADate:1985In this report a list is given of 1 808 rare, threatened and recently extinct plants in the fynbos and karoo biomes in the Cape Province of South Africa. The area covers the south-western and southern Cape, Namaqualand and the Karoo. Following ...Read more
Author:Higgs, FSDate:Jun 1985A series of enhancements to the DEROB-IUA 1, 0 building thermal simulation system coding which aid the advanced user of the system in validation exercises is described.Read more
Author:Hennig, HF-KODate:Aug 1985In this report Background levels and levels of metal accumulation in water, sediments and fauna were determined using a typical data set from South Africa-This was done to establish the extent and reliability of the available data and to ...Read more