Author:Senekal, FP; Vorster, JSDate:Jul 2007A large computer network such as the Internet contains millions of computers, services and users, interconnected in a complicated and ever changing web. This article provides an introduction to network mapping and usage determination – the ...Read more
Author:Masonta, Moshe T; Kola, LM; Lysko, Albert A; Pieterse, L; Velempini, MDate:Sep 2015Television white spaces (TVWS) refers to vacant channels in the ultra-high frequency (UHF) band between 470 and 690 MHz assigned for television broadcast and can be used opportunistically by secondary users (SUs). Research has shown that when ...Read more
Author:Aron, FO; Olwal, TO; Kurien, A; Hamam, YDate:Sep 2008Wireless mesh networks (WMNs) is becoming a promising new technology for extending coverage to farflung rural areas. This it achieves by linking the various wireless LANS (WLANs) in distant locations thus providing a vital mode complimentary ...Read more
Author:Awoyemi, BS; Alfa, Attahiru S; Maharaj, BTDate:Sep 2019This paper investigates highly efficient network restoration models for wireless sensor networks (WSNs) to be deployed for next-generation (xG) applications. The developed network restoration models are designed with two main goals in mind. ...Read more
Author:Marais, Mario A; Vannini, SDate:May 2021A number of studies in Information and Communication Technologies for Development (ICT4D) focus on projects’ sustainability and resilience. Over the years, scholars have identified many elements to enable achievement of these goals. Nevertheless, ...Read more
Author:Pauck, WJ; Venditti, R; Pocock, J; Andrew, JDate:2014The removal of ink from recovered papers by flotation deinking is considered to be the “heart” of the paper recycling process. Attempts to model the deinking flotation process from first principles has resulted in complex and not readily ...Read more
Author:Louw, Johannes ADate:Dec 2019Recent work in sequence-to-sequence neural networks with attention mechanisms, such as the Tacotron 2 and DCTTS architectures, have brought on substantial naturalness improvements in synthesised speech. These architectures require at least ...Read more
Author:Masindi, Vhahangwele; Gitari, WM; Tutu, H; De Beer, Morris; Nekhwevha, NDate:Aug 2014This paper evaluates the potential application of amorphous magnesite for remediation of Acid Mine Drainage (AMD). Magnesite was mixed with simulated AMD at specific S/L ratios and agitated in an orbital shaker and its capacity to remove ...Read more
Author:Maree, JP; Du Plessis, PDate:1994Traditionally, Lime is used for the neutralization of acidic effluents. Calcium carbonate should be considered as an alternative because of considerations such as lower cost, low solubility at pH values greater than 7 and simple dosing system ...Read more
Author:Mufhandu, Hazel T; Madiga, M; Gray, E; Rotherham, L; Khoza, T; Morris, L; Khati, MDate:Jul 2009This paper present a chemically synthesised derivative of the B40 parental aptamer, called UCLA1 (Cohen et al., 2008), was used for neutralization of endemic subtype C clinical isolates of HIV-1 from adult and paediatric patients and subtype ...Read more
Author:De Beer, FC; Coetzer, M; Fendeis, D; Silva, ADCDate:Oct 2004A few nondestructive examination (NDE) techniques are extensively being used worldwide to investigate aircraft structures for all types of defects. The detection of corrosion and eliminations, which are believed to be the major initiators of ...Read more
Author:Roos, TH; Quin, RL; De Beer, FC; Nshimirimana, RMDate:Sep 2011Probably the most common method of reverse engineering in mechanical engineering involves measuring the physical geometry of a component using a coordinate measuring machine (CMM). Neutron tomography, in contrast, is used primarily as a ...Read more
Author:Fourie, CJS; Henry, GDate:Jul 2009The Waterberg Coalfield in the Limpopo Province contains vast resources of coal and is the next area that will supply South Africa with energy well into the future. The coalfield is in the Karoo-age Ellisras Basin. Coal was discovered in the ...Read more
Author:Fourie, CJS; Du Plessis, SJ; Henry, GDate:Nov 2008The Waterberg Coalfield in the Limpopo Province of South Africa contains vast resources of coal that will ensure the country's energy security well into the future. The coalfield is situated in the Karoo-age Ellisras Basin and at present hosts ...Read more
Author:Archibald, CGMDate:1967The thallus is not gelatinous but is diffuse and pale grey-green in colour. The trichomes are without a sheath and are straight or curved, often closely entangled and rarely coiled. The dull blue- green trichomes are markedly constricted at ...Read more
Author:Giffen, MHDate:1970During a visit to Cape town in December 1967, the opportunity was sized to visit the sea shore at Sea point, a suburb and seaside resort near Cape Town, For the purpose of obtaining fertile class material of Laminaria, Ecklonea and polysiphonia ...Read more
Author:Rens, G; Meyer, TDate:May 2015One way for an agent to deal with uncertainty about its beliefs is to maintain a probability distribution over the worlds it believes are possible. A belief change operation may recommend some previously believed worlds to become impossible ...Read more
Author:Gille, S; Josey, S; Swart, SebDate:May 2016Air-sea exchanges in the Southern Ocean of momentum, heat, freshwater, carbon dioxide, and other gases are not well documented because fluxes are sparsely sampled (see Figure 1) and because high winds, high sea state, and lack of calibration ...Read more
Author:Moodley, D; Simonis, IDate:Nov 2006Sensor Web is a revolutionary concept towards achieving a collaborative, coherent, consistent, and consolidated sensor data collection, fusion and distribution system. Sensor Webs can perform as an extensive monitoring and sensing system that ...Read more
Author:Mass mediaDate:01 Oct 2007A new digital mapping and geographic analysis platform (GAP) is enabling researchers and decision-makers to estimate the spatial distribution of economic activity in South Africa in greater detail than ever before. The result of an 18 month ...Read more