Author:Raju, Kumar; Ozoemena, KIDate:Dec 2015High-performance electrochemical capacitors will drive the next-generation portable, flexible and wearable electronics. Unlike the conventional all-carbon supercapacitors (electric double layer capacitors, EDLC) with high power but poor energy ...Read more
Author:Botha, RC; Koen, W; Esser, MJD; Bollig, C; Combrinck, WL; Von Bergmann, M; Strauss, Hencharl JDate:Feb 2015A 1314 nm two-crystal Nd:YLF laser was designed and operated in both CW and actively Q-switched modes. Maximum CW output of 26.5 W resulted from 125 W of combined incident pump power. Active Q-switching was obtained by inserting a Brewster-cut ...Read more
Author:Kemp, Lana; Steenkamp, Anton J; De Saxe, CCDate:Sep 2021The substantial road maintenance backlog in South Africa, coupled with an inadequate budget allocation, requires high impact solutions in order to preserve the 158 000 km paved road network. Focussing efforts on the heavy vehicles operating ...Read more
Author:McGuigan, KG; Samaiyar, P; Du Preez, M; Conroy, RMDate:Sep 2011Recent solar disinfection (SODIS) studies in Bolivia and South Africa have reported compliance rates below 35% resulting in no overall statistically significant benefit associated with disease rates. In this study, the authors report the ...Read more
Author:Ballav, N; Maity, Arjun; Mishra, SBDate:Aug 2012Glycine doped polypyrrole (PPy-gly) adsorbent was prepared via in situ polymerization of pyrrole (Py) monomer in the presence of glycine (gly) for the removal of Cr(VI). Formation of PPy homopolymer and inclusion of gly in the PPy matrix were ...Read more
Author:Robinson, CM; Huot, Y; Schuback, N; Ryan-Keogh, Thomas J; Thomalla, Sandy J; Antoine, DDate:Jul 2021Studying the biogeochemistry of the Southern Ocean using remote sensing relies on accurate interpretation of ocean colour through bio-optical and biogeochemical relationships between quantities and properties of interest. During the Antarctic ...Read more
Author:Abia, ALK; Ubomba-Jaswa, Eunice; Momba, MNBDate:Oct 2015This study aimed at investigating the presence of antibiotic-resistant Escherichia coli in river bed sediments of the Apies River, Gauteng, South Africa, in order to better inform health management decisions designed to protect users of the ...Read more
Author:Kruger, OADate:2001The most commonly used method in the calibration of step gauges is the coordinate measuring machine (CMM), equipped with a laser interferometer for the highest accuracy. This paper describes a modification to a length-bar measuring machine ...Read more
Author:Kwon, Y-J; Lee, W; Genovesio, A; Emans, NDate:Mar 2012G-protein–coupled receptors (GPCRs) are pivotal in cellular responses to the environment and are common drug targets. Identification of selective small molecules acting on single GPCRs is complicated by the shared machinery coupling signal ...Read more
Author:Lalloo, Rajesh; Maharajh, Dheepak M; Gorgens, J; Gardiner, NS; Gorgens, JFDate:May 2009Previous studies have demonstrated the efficacy of our Bacillus cereus isolate (NRRL 100132) in reducing concentrations of nitrogenous wastes and inhibiting growth of fish pathogens. In vivo efficacy and tolerance to a range of physiological ...Read more
Author:Mabena, Chemist M; Roux, FSDate:Nov 2017A method is proposed to characterize a high-dimensional quantum channel with the aid of classical light. It uses a single nonseparable input optical field that contains correlations between spatial modes and wavelength to determine the effect ...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: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