Author:de Waal, ADate:Jun 2006The aim of this study is to evaluate the discovery of temporal themes in a text stream. The authors evaluate a probabilistic model for unsupervised learning to solve the problem and a scheme for theme evolution visualisation is proposed. The ...Read more
Author:Veerasamy, NamoshaDate:Mar 2022A Cybersecurity Operation Centre (SOC) is a centralized hub within an organisation that houses people, processes, and technologies aimed at continuous monitoring of the organization’s assets in order to prevent, detect, analyse, and respond ...Read more
Author:Van Wilgen, BWDate:Sep 2009The history and development of fire and invasive alien plant management policies in fynbos during the 20th century are reviewed. Fire was initially condemned outright as a destructive force, but as its vital role became better understood, ...Read more
Author:Archibald, S; Staver, C; Levin, SADate:Jan 2012Human ability to manipulate fire and the landscape has increased over evolutionary time, but the impact of this on fire regimes and consequences for biodiversity and biogeochemistry are hotly debated. Reconstructing historical changes in ...Read more
Author:Roux, FS; Wellens, T; Shatokhin, VDate:Aug 2015The evolution of the quantum states of photons propagating through turbulence can be investigated with the infinitesimal propagation equation (IPE). However, when it is expressed directly in terms of an orbital angular momentum (OAM) basis, ...Read more
Author:Roux, FSDate:Jan 2011Stochastic vortex fields are found in laser speckle, in scintillated beams propagating through a turbulent atmosphere, in images of holograms produced by Iterative Fourier Transform methods and in the beams produced by certain diffractive ...Read more
Author:Roux, FSDate:Jan 2011Orbital angular momentum (OAM) entangled bi-photons are a resource for the higher dimensional implementation of quantum cryptography, which allows secure communication over various channels. In the case where free-space is used as communication ...Read more
Author:Roux, FS; Chen, MDate:Sep 2010In an attempt to understand the process whereby the phase modulation due to atmospheric turbulance causes phase singularities (also called optical vortices), the authors investigated the effect of phase perturbations in speckle beams. They ...Read more
Author:Chen, M; Roux, FSDate:Oct 2010Knowledge of the behavior of stochastic optical fields can aid the understanding of the scintillation of light propagating through a turbulent medium. For this purpose, the authors perform a numerical investigation of the evolution of the ...Read more
Author:Pieterse, Heloise; Burke, Ivan DDate:Mar 2015Smartphones continue to excel in the 21st century due to the constant improvements of mobile technology. Advances in smartphones, such as increased computing power, improved device-to-device communication and the option of installing additional ...Read more
Author:Shatalov, M; Fedotov, IDate:Sep 2012Exact solutions of equations of longitudinal vibration of conical and exponential rod are analyzed for the Rayleigh-Love model. These solutions are used as reference results for checking accuracy of the method of lines. It is shown that the ...Read more
Author:Fernandes, PJLDate:Mar 1998Examination of a fifth wheel coupling which had failed in service showed that it had been modified and that the operating handle had been moved from its original design position. This modification completely eliminated the safety device ...Read more
Author:Maneylaws, A; Norman, G; von Glehn, FHDate:Dec 1997An extensive literature review of international work of mining equipment noise control has been carried out. The sources of noise on percussion rock drills, continuous miners, dust scrubbers and fans, long wall machinery and trackless vehicles ...Read more
Author:Momba, MNB; Cloete, TE; Venter, SN; Kfir, RDate:Sep 1999Groundwater was treated with chlorine and chloramine to study the incorporation and survival of Escherichia coli (E. coli) in developing biofilms in laboratory-scale units. Membrane filter and standard spread plate procedure were used to ...Read more
Author:Afachao, K; Abu-Mahfouz, Adnan MIDate:Jun 2023The Internet of Things (IoT) is the cutting edge of computing technology that connects things and integrate them into large ecosystem. Recently, the Edge Computing architecture is driving the rapid development of the Internet of Things (IoT). ...Read more
Author:De Frey, FSA; Handley, MF; Webber, RCWDate:Jan 2002De Frey in his report of mine design alternatives for the DEEPMINE project found that the small span small pillar (SSSP) concept, as a mining method for deep mines, from a rock engineering point of view, had certain positive advantages. The ...Read more
Author:Botha-Badenhorst, Danielle P; Veerasamy, NamoshaDate:Apr 2023Globally, women are underrepresented in the fields of Science, Technology, Engineering and Mathematics (STEM). In Sub-Saharan Africa (SSA), this underrepresentation is even more prevalent, as fewer women pursue STEM careers in SSA when compared ...Read more