Author:Helbig, M; Engelbrecht, APDate:2012Dynamic multi-objective optimisation problems (DMOOPs) occur in many situations in the real world. These optimisation problems do not have a single goal to solve, but many goals that are in conflict with one another - improvement in one goal ...Read more
Author:Olwal, TO; Van Wyk, BJ; Ntlatlapa, Ntsibane S; Djouani, K; Siarry, P; Hamam, YDate:2010With the tremendous growth of wireless networks into the next generation to provide better services, Wireless Mesh Networks (WMNs) have emerged to offer ubiquitous communication and seamless broadband applications. WMNs are hybrid networks ...Read more
Author:Nelwamondo, Fulufhelo V; Golding, D; Marwala, TDate:2013This paper develops and presents a novel technique for missing data estimation using a combination of dynamic programming, neural networks and genetic algorithms (GA) on suitable subsets of the input data. The method proposed here is well ...Read more
Author:Van Schalkwyk, Richard F; Smit, Johan CDate:Oct 2017In this paper the process followed in generating a high fidelity reference data set for radar cross section (RCS) modelling validation for a full-scale aircraft, is presented. An overview of two dynamic RCS measurement campaigns, involving ...Read more
Author:Mfupe, Luzango P; Masonta, Moshe T; Olwal, T; Mzyece, MDate:Sep 2012Dynamic spectrum access (DSA) technologies are increasingly viewed as a potential solution to improve overall spectral utilisation efficiency and for bridging the digital divide in the rural areas. In particular, DSA technologies have the ...Read more
Author:Hussien, HM; Katzis, K; Mfupe, Luzango PDate:Dec 2021The issue of spectrum allocation in cognitive high altitude platform wireless networks using TV White Space (TVWS) spectrum is presented in this paper. The mathematical model of spectrum allocation is given, and this model is converted into ...Read more
Author:Dludla, Angeline G; Mekuria, FissehaDate:May 2021Radio Frequency spectrum is the superhighway enabling a myriad of wireless ICT services and applications. Spectrum scarcity and expensive licensing cost has resulted in research and innovations by the CSIR, wireless network providers and ...Read more
Author:Dala, LDate:2015This research is based on the investigation into the dynamic stability associated with seaplanes during take-off. Various forces acting on a hydroplaning hull form have been empirically defined. Such empirical data have shown that under a ...Read more
Author:Naidoo, Kavendra; Skews, BWDate:Jul 2014The steady, two-dimensional transition criteria between regular and Mach reflection are well established. Little has been done on the dynamic effect on transition due to a rapidly rotating wedge. Results from experiments and computations done ...Read more
Author:Beraki, Asmerom F; De Witt, DG; Landman, WA; Olivier, CDate:Feb 2014The recent increase in availability of high-performance computing (HPC) resources in South Africa allowed the development of an ocean–atmosphere coupled general circulation model (OAGCM). The ECHAM4.5-South African Weather Service (SAWS) ...Read more
Author:Yuan, C; Tozuka, T; Landman, WA; Yamagata, TDate:2014Prediction skill for southern African (16°–33°E, 22°–35°S) summer precipitation in the Scale Interaction Experiment-Frontier coupled model is assessed for the period of 1982–2008. Using three different observation datasets, deterministic ...Read more
Author:Brown, Dane; Bradshaw, KDate:Sep 2016The face, fingerprint and palmprint feature vectors are automatically extracted and dynamically selected for fusion at the feature-level, toward an improved human identification accuracy. The feature-level has a higher potential accuracy than ...Read more
Author:Shatalov, M; Fedotov, I; Joubert, SDate:2006It was shown in 1985 by Acad. V. Zhuravlev that the angular rate of a pure vibrating mode excited in a vibratory gyroscope with spherical symmetry is proportional to an inertial angular rate of the gyroscope. The effect is three dimensional ...Read more
Author:Maxakato, NW; Ozoemena, KI; Arendse, CJDate:Mar 2010Comparative electrocatalytic behavior of functionalized multiwalled carbon nanotubes (fMWCNTs) electrodecorated with Pt/Ru nanoparticles towards the oxidation of methanol (MeOH), ethylene glycol (EG) and formic acid (FA) has been investigated. ...Read more
Author:Jovanovic, Nebojsa; Mu, Q; Bugan, Richard DH; Zhao, MDate:Jan 2015This paper describes the dynamics of evapotranspiration (ET) in South Africa using MOD16 ET satellite-derived data, and analyses the inter-dependency of variables used in the ET algorithm of Mu et al. (2011). Annual evapotranspiration is ...Read more
Author:Shatalov, M; Coetzee, CDate:May 2009The parametric electrode is normally used in the hemispherical resonator gyroscopes, operating in the whole angle regime, for maintaining of amplitudes of vibratory patterns. It is well known that due to variation of the gap between the ...Read more
Author:Everard, DA; Midgley, JJ; Van Wyk, GFDate:Dec 1995Indigenous forest in Kwa Zulu-Natal has been fairly well described, however, very little has been published on its dynamics. There is, to our knowledge, nothing published on disturbances regimes, dendrology and life histories of constituent ...Read more
Author:Jacobs, P; Von Solms, S; Grobler, MDate:Jul 2015Security Operation Centres (SOCs) and Computer Security Incident Response Teams (CSIRTs) or Computer Emergency Response Teams (CERTs) can play a pivotal role in the monitoring of, and response to threats, attacks and vulnerabilities in ...Read more
Author:Chelule, E; Herselman, Martha E; Van Greunen, DDate:Jul 2010This paper presents the results of a usability study conducted on South African B2C bricks-and-clicks retailers' e-commerce websites. The study employed two evaluation techniques namely; user evaluation and heuristic evaluation (HE). The ...Read more