Author:Strauss, Hencharl J; Koen, W; Bollig, C; Esser, MJD; Preussler, D; Nyangaza, K; Jacobs, CobusDate:Jun 2009In this paper, researchers have demonstrated that a Ho:YLF oscillator and amplifier system can be designed in a compact setup where the pump power from an unpolarized fibre laser utilized efficiently. The system produced more than 20 mJ energy ...Read more
Author:Davel, MH; Barnard, EDate:Oct 2004Bootstrapping techniques have significant potential for the efficient generation of linguistic resources such as electronic pronunciation dictionaries. The authors describe a system and an approach to bootstrapping for the development of such ...Read more
Author:Davel, MH; Barnard, EDate:Oct 2004The authors focus on factors related to the underlying rule-extraction algorithms, and demonstrate variants of the Dynamically Expanding Context algorithm, which are beneficial for this application. They show that continuous updating of the ...Read more
Author:McDonald, Andre M; Van Wyk, MADate:Sep 2018A novel random signal generator design that accommodates the specification of both the sample probability distribution as well as the signal bandwidth is presented in this paper. The generator achieves a high degree of computational efficiency ...Read more
Author:Davel, MH; Van Heerden, C; Kleynhans, N; Barnard, EDate:Aug 2011Spoken recordings that have been transcribed for human reading (e.g. as captions for audiovisual material, or to provide alternative modes of access to recordings) are widely available in many languages. Such recordings and transcriptions ...Read more
Author:Koen, W; Jacobs, Cobus; Collett, O; Esser, MJDDate:Oct 2013A thulium fiber laser pumped Ho:YLF laser delivering 45.1 W in a near diffraction limited beam when pumped with 84.7 W is demonstrated. The optical-to-optical efficiency of 53 % compares favorably with similar Ho:YAG lasers.Read more
Author:Koen, W; Jacobs, Cobus; Collett, ODate:Jul 2013Laser sources emitting in the 2 micron region is of particular interest for applications in medicine, remote sensing (LIDAR) and directed infra-red countermeasures. In addition, they are also desirable pump sources for efficient optical ...Read more
Author:Oldach, KH; Morgenstern, A; Rother, S; Girgi, M; O'Kennedy, Maretha M; Lorz, HDate:Jul 2001The authors report an in vitro culture system that provides reliable, highly efficient regeneration from immature embryos of pearl millet [Pennisetum glaucum (L.) R. Br.] and sorghum [Sorghum bicolor (L.) Moench]. Immature embryos were isolated ...Read more
Author:Rasheed, J; Wardak, AB; Abu-Mahfouz, Adnan MI; Umer, T; Yesiltepe, M; Waziry, SDate:Oct 2022Granting smart device consumers with information, simply and quickly, is what drives quick response (QR) codes and mobile marketing to go hand in hand. It boosts marketing campaigns and objectives and allows one to approach, engage, influence, ...Read more
Author:Abu-Mahfouz, Adnan MI; Hancke, GPDate:2009Elliptic curve cryptosystems like others public key encryption schemes, require computing a square roots modulo a prime number. The arithmetic operations in elliptic curve schemes over Optimal Extension Fields (OEF) can be efficiently computed ...Read more
Author:Smith, L; Oxtoby, Oliver F; Malan, AG; Meyer, JPDate:Jan 2011A unique technique to couple boundary-layer solutions with an inviscid solver is introduced. The boundary-layer solution is obtained using the two-integral method to solve displacement thickness with Newton’s method, at a fraction of the cost ...Read more
Author:Mittal, H; Alhassan, SM; Ray, Suprakas SDate:Dec 2018Herein, we report the low-temperature hydrothermal synthesis of a novel magnetic carbonaceous adsorbent (MCA) from corn starch for the adsorptive removal of methylene violet (MV) from aqueous solutions. Specifically, the carbon precursor ...Read more
Author:Maxakato, NW; Mamuru, SA; Ozoemena, KIDate:Feb 2011Electrocatalytic reduction of molecular oxygen in alkaline solution using a novel ruthenium tetrakis(diaquaplatinum) octacarboxyphthalocyanine (RuOCPcPt) electrocatalyst supported on multi-walled carbon nanotube electrode has been described. ...Read more
Author:Gusain, Rashi; Kumar, Neeraj; Fosso-Kankeu, E; Ray, Suprakas SDate:Aug 2019In this study, we investigate the adsorption capability of molybdenum sulfide (MoS2)/thiol-functionalized multiwalled carbon nanotube (SH-MWCNT) nanocomposite for rapid and efficient removal of heavy metals [Pb(II) and Cd(II)] from industrial ...Read more
Author:Kumar, Neeraj; Mittal, Hemmant; Parashar, V; Ray, Suprakas S; Ngila, JCDate:Feb 2016This research paper reports the synthesis and usage of the polyacrylamide (PAAm) grafted gum karaya (Gk) and nickel sulphide nanoparticle based hydrogel to effectively remove rhodamine 6G dye (R6G) from aqueous solution. Initially, the hydrogel ...Read morecb
Author:Makgwane, Peter R; Ray, SSDate:Sep 2014An efficient room temperature catalyzed oxidation of cyclohexane to cyclohexanone (K) and cyclohexanol (A) was achieved over hetero-mixed tungsten–vanadia (WO(sub3)/V(sub2)O(sub5)) using H(sub2)O(sub2) oxidant. WO(sub3)/V(sub2)O(sub5) exhibited ...Read more
Author:Giri, S; Das, R; Van der Westhuyzen, Christiaan W; Maity, ArjunDate:Jul 2017Silver nanocomposites (AgNCs) were produced by adsorption onto an electron-rich polypyrrole-mercaptoacetic acid (PPy-MAA) composite, known to be a highly efficient adsorbent for the removal of Ag+ ions from aqueous media in the remediation ...Read more