Author:Newell, N; Neal, W; Pandelani, Thanyani A; Reinecke, John D; Proud, WG; Masouros, SDDate:Jan 2016Improvised Explosive Devices have been the signature weapon in the recent conflicts in Iraq and Afghanistan. High-rate axial forces exerted by the vehicle floor to the lower limbs of occupants have been the cause of severe injuries. In order ...Read more
Author:Shoke, Lerato; Mutombo, Kalenda; Snyman, Izak M; Sono, Tleyane JDate:Oct 2016This paper deals with characterisation of blast loading to a mild steel plate (SUPRAFORM TM380) and titanium alloy (Ti6Al4V). Circular plates 3 mm thick with diameter 306 mm were impulsively loaded by a 20 g PE4 cylindrical charge at a standoff ...Read more
Author:Kareem, TR; Matthee, Karel W; Chan, HA; Ntlatlapa, Ntsibane SDate:Sep 2008This paper investigates the challenges involve in designing a dynamic channel assignment (DCA) scheme for wireless mesh networks, particularly for multi-radio systems. It motivates the need for fast switching and process coordination modules ...Read more
Author:Nobre, AM; Musango, JK; de Wit, MP; Ferreira, JGDate:Feb 2008The objective of this report is to conceptualize ecological and economic interactions in mariculture; to implement a dynamic ecological-economic model in order to: simulate the socio-economics of aquaculture production, simulate its effects ...Read more
Author:Naidoo, Kavendra; Skews, BWDate:Jun 2011There have been numerous studies on the steady state transition criteria between regular and Mach reflection of shock waves generated by a stationary, two-dimensional wedge in a steady supersonic flow, since the original shock wave reflection ...Read more
Author:Mutombo, K; Siyasiya, C; Stumpf, WEDate:Dec 2013Ti6Al4V samples were isothermally compressed using a Gleeble (supTM) 1500D thermo-mechanical simulator. Differential scanning calorimetry (DSC), microstructural analyses, and thermodynamic calculations were used to investigate the sequence ...Read more
Author:Pothan, LA; George, CN; John, Maya J; Thomas, SDate:2009Hybrid composites of glass and banana fiber (obtained from the pseudo stem of Musa sapientum) in polyester matrix, are subjected to dynamic mechanical analysis over a range of temperature and three different frequencies. The effect of temperature ...Read more
Author:Greeff, M; Engelbrecht, APDate:2010Optimisation problems occur in many situations and aspects of modern life. In reality, many of these problems are dynamic in nature, where changes can occur in the environment that influences the solutions of the optimisation problem. Many ...Read more
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