Author:Botha, Johannes G; Grobler, Marthie M; Hahn, J; Eloff, MMDate:Mar 2017Data protection and management of personal information has become an integral aspect for organisations and individuals in conducting business in the modern era. It has also become a major issue for legislators, regulators and consumers worldwide ...Read more
Author:Veerasamy, NamoshaDate:Apr 2010The aim of this paper is to describe how various observations made by sections of the world population direct people into making decisions and committing acts of cyberterror. The paper will thus look at issues like the environmental factors, ...Read more
Author:Veerasamy, NamoshaDate:Dec 2009This paper proposes a combined Red and Blue Team Methodology to guide the process of carrying out such security auditing and penetration testing tasks. Red and Blue Teams consist of various security auditing and penetration testing tasks which ...Read more
Author:Green, T; Uys, H; Biercuk, MJDate:Jul 2012Treating the effects of a time-dependent classical dephasing environment during quantum logic operations poses a theoretical challenge, as the application of noncommuting control operations gives rise to both dephasing and depolarization ...Read more
Author:Lekitima, JN; Ozoemena, KI; Jafta, CJ; Kobayashi, N; Song, Y; Tong, D; Chen, S; Oyama, MDate:2013A novel asymmetric electrochemical capacitor (AEC) with high energy and power densities has been developed using a graphene oxide/cobalt(II)tetrapyrazinoporphyrazine composite (GO/CoTPyzPz) as the positive electrode and graphene oxide/carbon ...Read more
Author:Ramontja, J; Ray, SS; Kesavan Pillai, Sreejarani; Luyt, ASDate:Dec 2009The inherent properties of poly(lactide), a biocompatible and biodegradable polymer, are concurrently improved by the incorporation of a small amount of surface functionalized carbon nanotubes. A new method has been used to functionalize the ...Read more
Author:Van Wyk, Llewellyn VDate:Oct 2016The construction, operation and maintenance of the built environment is a significant consumer of resources (Edwards 2002:10), many of which are not renewable (inter alia steel, aluminium, clay, cement, aggregates). It is also recognised that ...Read more
Author:Rapulenyane, Nomasonto; Ferg, E; Luo, HongzeDate:Sep 2018In a quest to produce cathode materials for lithium ion batteries that yield high capacities, the Li1.2Mn0.6Ni0.2O2, lithium-manganese rich cathode materials were synthesized via a facile one-pot co-precipitation process with various ratios ...Read more
Author:Lysko, Albert A; Mofolo, MDate:Oct 2014This paper overviews a low-power beam-switched smart antenna. The antenna operates at 2.4 GHz frequency band, has low power consumption (1.5 mW), and is intended for smart world applications in communications and metering. The antenna has ...Read more
Author:Hou, S; Chen, R; Zou, H; Shu, T; Ren, Jianwei; Li, X; Liao, SDate:Jun 2016A novel self-humidifying membrane electrode assembly (MEA) with homemade multifunctional Pt/SnO(sub2)-SiO(sub2)/C as the anode was developed to improve the performance of a proton exchange membrane fuel cell under low humidity. The MEAs' ...Read more
Author:Chauke, VP; Maity, Arjun; Chetty, ADate:Jul 2015Graphene oxide (GO) was functionalized with alpha cyclodextrin (aCD) through a covalent bond to form GO-aCD nanocomposites (NC). GO-aCD NC was further modified with polypyrrole (PPY) to afford an advanced GO-aCD-PPY NC for the removal of ...Read more
Author:Koen, W; Strauss, Hencharl J; Bollig, C; Esser, MJDDate:Sep 2010The authors present a high-power Tm:YLF slab laser double-end-pumped by two 300 W laser diode stacks. The resonator was designed such that the laser emitted at 1890 nm instead of the conventional operating wavelength of 1912 nm. At full ...Read more
Author:Schellhorn, M; Ngcobo, S; Bollig, C; Esser, MD; Preussler, DR; Nyangaza, KDate:Jun 2009The aim is to develop a high-power Tm:YLF slab laser which can be utilized to pump a Ho slab laser. A 68 W Tm:YLF slab laser was recently presented in [1] pumped from one end by a single 6-bar stack delivering ~300 W of pump power. In this ...Read more
Author:Makgopa, K; Ejikeme, PM; Jafta, CJ; Raju, Kumar; Zeiger, M; Presser, V; Ozoemena, KIDate:Jan 2015We present a study on the pseudocapacitive properties of birnessite-type MnO(sub2) grafted on highly graphitized onion-like carbon (OLC/MnO(sub2)). In a three-electrode setup, we evaluated two different substrates, namely a platinum disc and ...Read more
Author:Ghoor, Ikraam S; Bezuidenhout, Petrone H; Joubert, Trudi HDate:Sep 2017This paper presents the design of a low-complexity, linear and sub-pF CMOS capacitance-frequency converter for reading out capacitive bacterial bio/sensors in an attempt to create a widespread bio/sensor readout module. The significant design ...Read more
Author:Landman, WA; DeWitt, DG; Lee, D-EDate:Sep 2011The evolution of global sea-surface temperature (SST) anomalies over several months ahead is often relatively predictable. Subsequently employing predicted SST in atmospheric general circulation models (AGCMs) can provide means of generating ...Read more
Author:Engelbrecht, CJ; Engelbrecht, FA; Dyson, LLDate:Jan 2012Mid-tropospheric closed-lows (cold-core cut-off lows and warm-core tropical lows) are important rain producing weather systems for the southern Africa region. Over South Africa, most wide-spread flood events are caused by these systems. It ...Read more