Author:Van Niekerk, Cornelia WDate:Mar 2013It is highly likely that hazards and extreme climatic events will occur more frequently in the future and will become more severe – increasing the vulnerability and risk of millions of poor urbanites in developing countries. Disaster resilience ...Read more
Author:Zhu, H; Ouahada, K; Abu-Mahfouz, Adnan MIDate:Dec 2022Peer-to-peer (P2P) energy trading built on a smart information system in networked microgrids (MGs) is an emerging economic approach to facilitate energy sharing among networked MGs to achieve mutual cost-effective operation and improve the ...Read more
Author:Olwal, TO; Ntlatlapa, Ntsibane S; Hamam, Y; Aron, F; Van Wyk, BJ; Johnson, DLDate:Sep 2008This paper presents an analytical model for the selection of the transmission power based on the bi-directional medium access information. Most of dynamic transmission power control algorithms are based on the single directional channel and ...Read more
Author:Ittmann, HWDate:09 Oct 2008October marls National Transport month, giving rise to opportunities to focus on and draw attention to a variety of aspects associated with transport. Everyone in the country is affected by transport in one way or another, with those in ...Read more
Author:Godin, T; Forbes, A; Naidoo, Darryl; Fromager, M; Cagniot, E; Aït-Ameur, KDate:Jun 2011The concept of transverse correlation vanishing, between the fraction of power contained in the centre and wings of a probe beam, recently introduced [Opt. Commun. 282 (2009) 3854–3858] is important to be considered when measuring the effective ...Read more
Author:Naidoo, Darryl; Godin, T; Fromager, M; Cagniot, E; Passilly, N; Forbes, A; Aït-Ameur, KDate:Nov 2011The article outlines an approach to mode selection in a microchip laser through judicious shaping of the pump light to create a high modal overlap with the desired mode. The authors demonstrate the principle by creating a donut-shaped pump ...Read more
Author:Maree, JP; Greben, HA; De Beer, MorrisDate:Apr 2004A novel chemical/biological process is described in which sulphate and sulphide are removed simultaneously during biological treatment. Partial sulphate removal is achieved during chemical pre-treatment. In the biological stage sulphate is ...Read more
Author:Turner, P; Murphy, RJDate:Aug 1995Several factors which influence the treatment of timber products with vapour phase preservatives such as borate esters are considered. Gas flow rate through the substrate was found to be a significant factor limiting both preservative penetration ...Read more
Author:Turner, P; Murphy, RJDate:Mar 1998This paper forms a continuation of the work on treatment of timber products with gaseous borate esters. Turner and Murphy (1995) in an earlier paper indicated that gas flow rate into the wood substrate was the principle factor limiting the ...Read more
Author:Malise, TTA; Nweke, EE; Takundwa, Mutsa M; Fru, PF; Thimiri Govindaraj, Deepak BDate:May 2023In the past few years, development of approved drug candidates has improved the disease management of multiple myeloma (MM). However, due to drug resistance, some of the patients do not respond positively, while some of the patients acquire ...Read more
Author:Schoeman, JJ; Steyn, A; Scurr, PJDate:Sep 1996Reverse osmosis (RO) and physical/chemical technology were evaluated for treatment of neutralized spent acid effluent (seepage) containing high concentration levels of TDS (7500mg/l), Ca (400 mg/l), Cr-V1 (42 mg/l), nitrate-nitrogen (827 ...Read more
Author:Staver, AC; Archibald, S; Levin, SDate:2011Savannas are known as ecosystems with tree cover below climate-defined equilibrium values. However, a predictive framework for understanding constraints on tree cover is lacking. The authors present a) a spatially extensive analysis of tree ...Read more
Author:Gondwe, MFK; Geldenhuys, CJ; Chirwa, PWC; Assédé, ESP; Cho, Moses ADate:Nov 2020Comparative information on the composition and diversity in tree species associations in Miombo woodland is limited. This study assessed how tree species associations across forest reserves of Miombo woodland in Malawi varied in composition ...Read more
Author:Scholes, RJ; Archer, SRDate:1997Savannas occur where trees and grasses interact to create a biome that is neither grassland nor forest. Woody and gramineous plants interact by many mechanisms, some negative (competition) and some positive (facilitation). The strength and ...Read more
Author:Masekoameng, KE; Leaner, J; Dabrowski, James MDate:Aug 2010Recent studies suggest an increase in mercury (Hg) emissions to the global environment, particularly as a result of anthropogenic activities. This has prompted many countries to complete Hg emission inventories, based on country-specific Hg ...Read more
Author:Scholes, RJ; Dowty, PR; Caylor, K; Parsons, DAB; Frost, PGH; Shugart, HHDate:Jun 2002The Kalahari sand sheet occupies 2.5 million ha in southern Africa. It is an area with relatively similar deep Aeolian soils, and a strong south to north gradient in rainfall, from 200 to 1000 mm mean annual precipitation (MAP) in the region ...Read more
Author:Eckhardt, HC; Van Wilgen, BW; Biggs, HDate:Jun 2000South Africa’s Kruger National Park is one of the largest conservation areas in Africa. In 1940, 1974 and 1998 changes in the cover and density of shrubs and trees were assessed from aerial photographs, and in 1984 and 1996 fixed-point ...Read more