Author:Belyi, VN; Kazak, NS; Khilo, NA; Forbes, A; Ropot, PIDate:Aug 2009The spectrum of spatial frequencies (SFS) of Bessel beams properties emerging at their spatial localization is investigated. The case, when limiting aperture has a circular shape and a center at any distance from the optical axis, was studied. ...Read more
Author:Lekoadi, Paul M; Maledi, N; Tlotleng, Monnamme; Masina, Bathusile NDate:Feb 2020The investigation of microstructural and hardness properties of high-speed selective laser melted (SLM) produced Ti6Al4V coupons after various heat treatments. Heat treatment was performed in order to homogenize and improve the microstructure ...Read more
Author:Lekoadi, Paul M; Maledi, N; Tlotleng, Monnamme; Masina, Bathusile NDate:Nov 2018This study presents an investigation of the effect of different heat treatments on the microstructure of Ti6Al4V fabricated components produced by high speed selective laser melting. 10 mm x 10 mm x 10 mm cubes were heat treated in an inert ...Read more
Author:Sprung, D; Sucher, E; Ramkilowan, A; Griffith, DJDate:Sep 2014Optical turbulence represented by the structure function parameter of the refractive index C(subn)(sup2) is a relevant parameter for the performance of electro-optical systems and characterization of the atmospheric influence on imaging. It ...Read more
Author:Matogoro, J; Mfupe, Luzango P; Mvungi, N; Anatory, JDate:Oct 2021A study was conducted to investigate radio propagation characteristics in ultra-high frequency (UHF) bands over straight and circular paths in central Tanzania. The received signal power values (in dBm) were collected using a spectrum analyzer ...Read more
Author:Machaka, P; Bagula, ADate:2015The paper seeks to investigate the use of scalable machine learning techniques to address anomaly detection problem in a large Wi-Fi network. This was in the efforts of achieving a highly scalable preemptive monitoring tool for wireless ...Read more
Author:Komba, Julius J; Mgangira, Martin B; Mohale, LDate:Jul 2016The fundamental shape/morphological properties of coarse aggregates including form, angularity, and surface texture are known to influence the performance of pavements. The coarse aggregate shape properties are affected by many factors, amongst ...Read more
Author:Nomqonde, BH; Mashinini, PM; Lekoadi, Paul M; Masina, Bathusile NDate:Nov 2022This study investigated the microstructure evolution of the TiC/Ti-6Al-4V matrix composite produced using a 1073 nm continuous wave (CW), IPG Ytterbium fibre laser. The influence of thermal gradient, overlap, and re-melting of the previous ...Read more
Author:Seerane, MN; Chikwanda, HK; Focke, W; Machaka, RonaldDate:Oct 2013Powder loading is one of the most critical factors in metal injection moulding (MIM) technology. It largely determines the success or failure of the subsequent MIM processes. A gas-atomized Ti6Al4V powder was investigated to determine an ...Read more
Author:Lekoadi, Paul M; Tlotleng, Monnamme; Siyasiya, Charles; Masina, Bathusile NDate:Nov 2023This study presents the investigation of TiB distribution characteristics on the microstructure of in-situ synthesized TiB/Ti6Al4V single-track composites manufacture with laser metal deposition. Ti6Al4V alloy was reinforced by adding TiB2 ...Read more
Author:Adeniran, A; Motsatsi, Lorato L; Mbanga, S; Ayesu-Koranteng, E; Shakantu, WDate:2022Solid waste is a global challenge that is more pronounced in developing countries such as South Africa, where its management is a major concern. The government has recently made a concerted effort to engage the public in sustainable waste ...Read morecbna
Author:Badou, DF; Afouda, A; Diekkruger, B; Kapangaziwiri, EvisonDate:Jul 2015West Africa has experienced severe droughts during 1970s and 1980s. On the other hand, the region is characterized by high inter-annual rainfall variability and there seems to be a recent recovery. But has the drought stopped? To answer this ...Read more
Author:Khutsoane, Oratile C; Isong, B; Abu-Mahfouz, Adnan MIDate:Oct 2017Internet of Things (IoT) has revolutionized the traditional Internet where only human-centric services were offered. It has enabled objects to have the ability to connect and communicate through the Internet. IoT has several applications such ...Read more
Author:Smith, Andrew C; Butgereit, LDate:Nov 2012The demand for electrical energy is increasing globally. Both the average as well as the anticipated peak demand must be considered by the supplier when designing an electrical supply. We present an Internet of Things – based system, and a ...Read more
Author:Nigussie, E; Musumba, G; Tegegne, T; Lemma, A; Mekuria, FissehaDate:Nov 2020Ensuring food security has become a challenge in Sub-Saharan Africa (SSA) due to combined effects of climate change, high population growth, and relying on rainfed farming. Governments are establishing shared irrigation infrastructure for ...Read more
Author:Chauke, Mapoo D; Gama, G; Sebetoa, Matlapane R; Marimuthu, Luveshan; Mavhona, TshifhiwaDate:Jul 2023Supply Chain Management (SCM) has evolved over the years, from mechanisation in the 1920s to intelligentisation in the 2000s. Major changes in supply chain are due to challenges in the environment, such as the fragmentation of SCM activities ...Read more
Author:Mabuza-Hocquet, Gugulethu P; Nelwamondo, Fulufhelo VDate:Oct 2012Poor digital iris images prove to be a challenge when iris features have to be recognised and extracted for use in iris classification. To ensure the accuracy of a typical iris recognition system, acquired
iris images have to undergo a ...Read more
Author:Schwering, PBW; Bezuidenhout, DF; Gunter, WH; Le Roux, FPJ; Sieberhagen, RHDate:Apr 2008Present-day naval operations take place in coastal environments as well as narrow straits all over the world. Coastal environments around the world are exhibiting a number of threats to naval forces. In particular a large number of asymmetric ...Read more