Author:Geyer, H; Ngidi, MS; Mans, Gerbrand GDate:May 2018The former homelands and tribal authorities have large populations and high densities with low levels of economic activity and low employment. Population growth in these settlements is in contrast to expectations of population declines, due ...Read more
Author:Nabarro, FRNDate:15 Dec 2004Three models of power-law creep are frequently presented. Those of Weertman assume distributed sources of dislocations which spread until they meet dislocations from other sources. They then annihilate by bulk diffusion. If the density of ...Read more
Author:Rosendo, S; Celliers, L; Mechisso, MDate:Jan 2018Many countries are implementing Integrated Coastal Management (ICM, also known as Integrated Coastal Zone Management or ICZM) as a means to promote the sustainable use, development and protection of coastal environments. It has also been shown ...Read more
Author:Luo, H; Vaivars, G; Mathe, Mahlanyane KDate:Apr 2012The proton exchange membrane based on polyetheretherketone was prepared via two steps of cross-linking. The properties of the double cross-linked membrane (water uptake, proton conductivity, methanol permeability and thermal stability) have ...Read more
Author:Steyn, JM; Odendaal, JW; Joubert, JDate:Sep 2009A double dipole antenna design is proposed for wireless local area network (WLAN) applications. Two parallel dipoles are used to facilitate operation in both the standard WLAN frequency bands (IEEE 802.11b and IEEE 802.11a) simultaneously. ...Read more
Author:Booth, R; Chopra, S; Meyer, T; Ghose, ADate:Nov 2010Many belief change formalisms employ plausibility orderings over the set of possible worlds to determine how the beliefs of an agent ought to be modified after the receipt of a new epistemic input. While most such possible world semantics ...Read more
Author:Litvin, IA; Ngcobo, Sandile; Naidoo, Darryl; Ait-Ameur, K; Forbes, ADate:Feb 2014Laguerre–Gaussian beams with a nonzero azimuthal index are known to carry orbital angular momentum (OAM), and are routinely created external to laser cavities. The few reports of obtaining such beams from laser cavities suffer from inconclusive ...Read more
Author:Lalloo, Rajesh; Maharajh, Dheepak M; Görgens, J; Gardiner, NDate:Mar 2010Biological products offer advantages over chemotherapeutics in aquaculture. Adoption in commercial application is lacking due to limitations in process and product development that address key end user product requirements such as cost, ...Read more
Author:Musvoto, Constansia DDate:Dec 2015The green economy, with its underlying philosophy of reducing the dependence of economic development on the increased consumption of and damage to natural resources is a tool for achieving sustainable development. Globally, a green economy ...Read more
Author:Knüppe, K; Meissner, RichardDate:Nov 2016Over the last 17 years South Africa's water and land resources management has changed dramatically. This rapid evolution has been accompanied by a growing number of laws and policies to co-balance water allocation for human basic needs and ...Read more
Author:Archibald, SA; Kirton, A; Van der Merwe, Martina R; Scholes, RJ; Williams, CA; Hanan, NDate:2009Inter-annual variability in primary production and ecosystem respiration was explored using eddy-covariance data at a semi-arid savanna site in the Kruger Park, South Africa. New methods of extrapolating night-time respiration to the entire ...Read more
Author:Raw, JL; Godbold, JA; Van Niekerk, Lara; Adams, JBDate:Oct 2019Mangrove distribution patterns at regional scales are influenced by additional factors besides temperature and rainfall regimes. This study identified abiotic drivers of mangrove area cover along the high-energy, wave-dominated coastline of ...Read more
Author:Walters, Chavon RDate:Jun 2017With increasing frequency countries are faced with a new set of chemicals that are contaminating the environment. These so-called ‘emerging contaminants’ hold potential risk to humans and/or the environment. The challenge is that, generally, ...Read more
Author:Zunckel, M; Piketh, S; Freiman, TDate:Oct 1999The inferential method is applied to estimate dry deposition rates of sulphur at a remote rural site on the South African south-eastern escarpment. Two 2-week intensive monitoring campaigns were conducted during the Ben MacDhui High Altitude ...Read more
Author:Zunckel, M; Turner, CR; Wells, RBDate:Oct 1996A pilot study which uses the inferential method to estimate dry deposition of sulphur on the central Mpumalanga highveld is discussed in this paper. Ambient concentrations of sulphur dioxide, particulates and micro-meteorological measurements ...Read more
Author:Le Roux, D; Stock, WD; Bond, WJ; Maphanga, DDate:May 1996Clonal variation in water use efficiency (WUE), dry mass accumulation and allocation, and stable carbon isotope ratio (delta (13)C) of crude leaf fibre extracts was determined in six clones of Eucalyptus grandis W. Hill ex Maiden grown for ...Read more
Author:Bugan, Richard DH; De Clercq, W; Jovanovic, NebojsaDate:Nov 2010Increased dryland salinity in the Swartland and Overberg regions poses a threat to the bread basket of the Western Cape, water resources in an already water-stressed area, water supply to the industrialised Saldanha region as well as the ...Read more
Author:Taljaard, Susan; Slinger, JH; Van der Merwe, JDate:Nov 2013Despite the place-based nature of integrated coastal management (ICM) implementation and the importance of considering country-specific knowledge, a number of uniformities in ICM implementation have been distinguished. In this paper, the ...Read more
Author:Oliphant, CJ; Arendse, CJ; Malgas, GF; Motaung, DE; Muller, TFG; Knoesen, DDate:Oct 2009This paper reports on the deposition of crystalline single-helix carbon microcoils, in the as-deposited state, by the hot-wire chemical vapor deposition process without any special preparation of nano-sized transition metal catalysts and ...Read more