Author:Pityana, Sisa LDate:Dec 2011This work investigates the reinforcement of the aluminium matrix with TiC ceramic and in-situ synthesized AI-Ni intermetallic particles.Read more
Author:Abu-Mahfouz, Adnan MI; Hancke, GPDate:Mar 2017Many wireless sensor networks (WSNs) applications, techniques, and algorithms require the position of the sensor nodes. Sensor nodes mainly rely on localization algorithms to determine their own physical location. Usually, these sensor nodes ...Read more
Author:Wright, CY; Coetzee, G; Ncongwane, KDate:Jul 2011The detrimental effects of excess personal solar ultraviolet (UV) radiation exposure include sunburn, immunosuppression and skin cancer. In South Africa, individuals with minimum natural protection from melanin, including fair-skinned individuals ...Read more
Author:Ncube, EN; Steenkamp, Lucia H; Dubery, IADate:Aug 2020Ambergris, an excretion product of sperm whales, has been a valued agent in the formulation of perfumes. The composition of ambergris consists of two major components: 40–46% cholestanol type steroids and approximately 25–45% of a triterpenoid ...Read more
Author:Mangena, SJ; De Korte, GJ; McCrindle, RI; Morgan, DLDate:15 Oct 2004Five ultra fine bituminous coals from the Witbank coalfield were studied. Selected chemical and physical properties, coal petrographic characteristics and mineralogical compositions of the coals were measured. The coals were compacted, using ...Read more
Author:Kesavan Pillai, Sreejarani; Ramontja, J; Ray, Suprakas SDate:Nov 2011This work describes a comparison between two chemical functionalization strategies for the amine functionalization of carbon nanotubes (CNTs). In the first procedure, the CNTs are functionalized in direct amination process that avoids the use ...Read more
Author:Raju, KumarDate:Jun 2020The search for new materials that can hold the heteroatoms viz., nitrogen, oxygen and phosphorus becomes crucial for robust energy storage and conversion devices. Recently, ammonium metal phosphates (NH4MPO4, M = Mn2+, Ni2+, Co2+, Fe2+, etc.) ...Read more
Author:Archibald, REM; Schoeman, FRDate:1984Amphora coeffeaeformis (Agardh) Kutzing is frequently found in brackish water. However, different concepts of this species found in the literature lead to confusion with respect to its true identity. In this study Agardh’s type material from ...Read more
Author:Naidoo, Darryl; Sroor, H; Litvin, I; Forbes, ADate:Sep 2019The Higher order Poincar´e sphere (HOPS) is generally used to describe scalar and vector orbital angular momentum modes. These modes have found many applications to date; however, they are limited to low power levels. It has thus become topical ...Read more
Author:Shyamal, S; Maity, Arjun; Satpati, AK; Bhattacharya, CDate:Jun 2019A facile single step electro-synthesis is applied to develop Cu/Cu2O/Cd(OH)2 thin films from the alkaline copper sulfate solution in presence of different levels of Cd2+. Cadmium implemented a synergistic effect, in the modification of Cu2O, ...Read more
Author:Dudley, Angela L; Nock, M; Konrad, T; Forbes, ADate:Mar 2010Since the pioneering work on the entanglement of the orbital angular momentum (OAM) states of light, much attention has been devoted to the subject, with particular attention into the quantum aspects of information processing using OAM. ...Read more
Author:Dudley, Angela L; Nock, M; Konrad, T; Roux, FS; Forbes, ADate:Oct 2010In this article, the authors present an amplitude damping channel for Laguerre-Gaussian modes. The channel is tested experimentally for a Laguerre-Gaussian mode, having an azimuthal index l = 1, illustrating that it decays to a Gaussian mode ...Read more
Author:Dudley, Angela L; Nock, M; Konrad, T; Roux, F; Forbes, ADate:Sep 2010An interferometer, mimicking an amplitude damping channel for vortex modes, is presented. Experimentally the action of the channel is in good agreement with that predicted theoretically. Since we can characterize the action of the channel on ...Read more
Author:Onumanyi, Adeiza J; Abu-Mahfouz, Adnan MI; Hancke, GDate:Feb 2021Self-adaptive threshold adjustment algorithms (SATAs) are required to reconfigure their parameters autonomously (i.e. to achieve self-parameter adjustment) at runtime and during online use for effective signal detection in cognitive radio ...Read more
Author:Wilsenach, J; Burke, L; Radebe, V; Mashego, M; Stone, W; Mouton, M; Botha, ADate:Jan 2014The century-old trickling filters at the Daspoort Wastewater Treatment Works in Pretoria (Gauteng, South Africa) are known for their remarkable removal of nitrogen from municipal wastewater. Our study was conducted to identify the microbiological ...Read more
Author:Van Vuuren, DS; Engelbrecht, AD; Hadley, TDDate:Sep 2006Titanium is the ninth most abundant element and the forth most common construction metal in the earth’s crust. It’s high strength, high-temperature performance, low density, high corrosion resistance and bio-compatibility makes it the ideal ...Read more
Author:Ncube, EN; Mhlongo, MI; Piater, LA; Steenkamp, PA; Dubery, IA; Madala, NEDate:Nov 2014Chlorogenic acids (CGAs) are a class of phytochemicals that are formed as esters between different derivatives of cinnamic acid and quinic acid molecules. In plants, accumulation of these compounds has been linked to several physiological ...Read more
Author:Helbig, M; Engelbrecht, APDate:Jun 2012Dynamic multi-objective optimisation problems (DMOOPs) occur in many situations in the real world. These optimisation problems do not have a single goal to solve, but many goals that are in conflict with one another - improvement in one goal ...Read more