Author:Mamushiane, Lusani; Shozi, Themba CDate:May 2021SDN marks a paradigm shift towards an externalized and logically centralized controller, unlike the legacy networks where control and data planes are tightly coupled. The controller has a comprehensive view of the network, offering flexibility ...Read more
Author:Zengeya, TA; Robertson, MP; Booth, AJ; Chimimba, CTDate:Jan 2013This study outlines the development of a qualitative risk assessment method and its application as a screening tool for determining the risk of establishment and spread of the invasive Nile tilapia, Oreochromis niloticus (Linnaeus, 1758), ...Read more
Author:Henrico, S; Coetzee, S; Cooper, Antony KDate:Nov 2022We conducted a study to find out whether and why South African users accepted QGIS. In the quantitative part of the study, we found that QGIS acceptance is primarily influenced by habit, followed by facilitating conditions, price value, and ...Read more
Author:Ndiege, JRA; Wayi, N; Herselman, Martha EDate:Feb 2012The use of Information Systems (IS) of acceptable quality has been viewed to be vital for improving the efficiency and effectiveness of business operations. Many SMEs in developing countries are beginning to embrace the use of IS to help ...Read more
Author:Masonta, Moshe T; Rananga, SDate:Aug 2023The growing demand for high-speed and ubiquitous connectivity continues to present new challenges for efficient usage, management and sharing of radio frequency spectrum. Dynamic spectrum access concept, enabled by cognitive radio technology, ...Read more
Author:Botha, GE; Oliveira, JC; Ahrné, LDate:Apr 2012Combination of osmotic dehydration with microwave assisted air drying offers increased flexibility for process control and product quality. Osmotic dehydration (55ºBrix solution at 40ºC for 90 minutes) combined with microwave assisted air ...Read more
Author:Mngenge, NA; Nelwamondo, Fulufhelo V; Malumedzha, T; Msimang, NDate:Jun 2012The need for segmentation of low quality fingerprints in forensics, high security and civilian applications is constantly increasing. Most segmentation algorithms proposed in the literature normally deal with separation of the background ...Read more
Author:Bugan, Richard DH; Jovanovic, Nebojsa; De Clercq, WPDate:Jun 2015Soil and stream salinisation is a major environmental problem because it reduces the productivity of landscapes and degrades water quality. The Berg River (South Africa) has been exhibiting a trend of increasing salinity levels, which has ...Read more
Author:Dudley, Angela L; Litvin, IA; Forbes, ADate:Mar 2012In this work we derive expressions for the orbital angular momentum (OAM) density of light, for both symmetric and nonsymmetric optical fields, that allow a direct comparison between theory and experiment. We present a simple method for ...Read more
Author:Abia, ALK; Ubomba-Jaswa, Eunice; Genthe, Bettina; Momba, MNBDate:Oct 2016Although higher microbial concentrations have been reported in sediments than in the overlying water column, most quantitative microbial risk assessment (QMRA) studies have not clearly indicated the contribution of sediment-borne pathogens ...Read more
Author:Uys, Hermann; Bassa, H; Du Toit, P; Ghosh, S; Konrad, TDate:Jun 2018Measurement combined with feedback that aims to restore a presumed premeasurement quantum state will yield this state after a few measurement-feedback cycles even if the actual state of the system initially had no resemblance to the presumed ...Read more
Author:Fosu, EA; Obuah, C; Hamenu, L; Aniagyei, A; Ainooson, MK; Govender, Krishna KDate:Aug 2021Transition-metal-mediated oxygen transfer reactions are of importance in both industry and academia; thus, a series of rhenium oxo complexes of the type ReO3L (L=O-, Cl-, F-, OH-, Br-, I-) and their effects as oxidation catalysts on ethylene ...Read more
Author:Sephton, Bereneice; Dudley, Angela L; Forbes, ADate:Dec 2017Bereneice Sephton, Angela Dudley and Andrew Forbes explain the importance of random motion. So, what exactly is random motion? The answer can be dated back to 1827 when a botanist, Robert Brown, noted the movement of pollen floating on water ...Read more
Author:Bogaers, Alfred EJ; Kok, S; Reddy, BD; Franz, TDate:Sep 2014In this paper we introduce a new multi-vector update quasi-Newton (MVQN) method for implicit coupling of partitioned, transient FSI solvers. The new quasi-Newton method facilitates the use of 'black-box' field solvers and under certain ...Read more
Author:Haelterman, R; Bogaers, Alfred EJ; Degroote, J; Boutet, NDate:Aug 2017Often in nature different physical systems interact which translates to coupled mathematical models. Even if powerful solvers often already exist for problems in a single physical domain (e.g. structural or fluid problems), the development ...Read more
Author:Abdul Gaffar, MY; Nel, Willem AJ; Inggs, MRDate:Oct 2008Inverse synthetic aperture radar (ISAR) is an imaging technique that is dependent on an object’s rotational motion over a coherent processing interval. Maritime vessels and aircraft possess 3-D rotational motion, whereas it is only their ISAR ...Read more
Author:Goyal, SK; Boukama-Dzoussi, PE; Ghosh, S; Roux, FS; Konrad, TDate:Apr 2014Quantum teleportation, the transfer of the state of one quantum system to another without direct interaction between both systems, is an important way to transmit information encoded in quantum states and to generate quantum correlations ...Read more