Author:Bachoo, A; Tapamo, J-RDate:Mar 2009Identification of individuals using iris recognition is an emerging technology. Segmentation of the iris texture from an acquired digital image of the eye is not always accurate - the image contains noise elements such as skin, reflection and ...Read more
Author:Robinson, GA; Turpie, DWFDate:Oct 1978The performance and physical properties of fibre, yarn and fabric produced from a 64's quality imported merino wool, a Cape merino 64's wool and a 50/50 blend of these has been investigated.Read more
Author:Kgarume, Thabang E; Brovko, Fatheela; Van Schoor, MichaelDate:Sep 2015This paper aims to demonstrate, through practical examples and numerical modelling, the trade-off between range and resolution in ground penetrating radar (GPR) prospecting. GPR surveys can easily fail when the target and host rock properties ...Read more
Author:Moller, H; Govender, G; Stumpf, WE; Pistorius, PCDate:2010The heat treatment response of semisolid metal high pressure die cast Al-7Si-Mg alloys A356 and F357 was studied and compared. It was found that the heat treatment behaviour of alloy F357 is influenced markedly by the stability of the Mg ...Read more
Author:Cronje, J; De Villiers, JDate:Nov 2012This paper presents a comparison of several established and recent image feature-descriptors to register long wave infra-red images in the 8–14 m band to visual band images. The feature descriptors were chosen to include robust algorithms, ...Read more
Author:Cronje, J; De Villiers, JDate:Nov 2012This paper presents a comparison of several established and recent image feature-descriptors to register long wave infra-red images in the 8–14 m band to visual band images. The feature descriptors were chosen to include robust algorithms, ...Read more
Author:De Villiers, Johan PDate:Jun 2010Improving the quality of an image increases the probability, speed and accuracy with which possible objects of interest can be located and identified. Image sharpening, in particular, can correct for soft focus and strengthen the outlines of ...Read more
Author:Madikizela, C; Cornish, LA; Chown, LH; Möller, H; Arthur, Nana KKDate:Nov 2017In situ alloying is an important topic for alloy development and improvement of mechanical properties in additive manufacturing. With the scarcity of getting most commercial titanium alloys in powder form, development and qualification of ...Read more
Author:Forbes, A; Du Plessis, A; Rohwer, EGDate:Aug 2005Infra-red laser beam shaping has the inherent difficulty that simple ray tracing methods often yield anomalous results, due primarily to the propagation effects at longer wavelengths. Techniques based on diffraction theory have been developed ...Read more
Author:Kruger, Jene; Bezuidenhout, Petrone H; Joubert, T-HDate:Sep 2016Applications for diagnostic and environmental point-of-need require processes and building blocks to add smart features to disposable biosensors on low-cost substrates. A novel method for producing such biosensors is printing electronics using ...Read more
Author:John, Maya J; Thomas, S; Varughese, KTDate:Nov 2009Natural rubber was reinforced with sisal–oil palm hybrid fibers. Composites were prepared by varying the weight content of the fibers and chemical modification of the biofibers. The interaction of three different types of aromatic solvents, ...Read more
Author:Masemola, Cecilia; Cho, Moses A; Ramoelo, AbelDate:Jun 2016The leaf area index (LAI) is the key biophysical indicator used to assess the condition of rangeland. In this study, we investigated the implications of narrow spectral response, high radiometric resolution (12 bits), and higher signal-to-noise ...Read more
Author:Cloete, OP; Abu-Mahfouz, Adnan MI; Hancke, GPDate:Jun 2019The strong relationship between the relevancy of sensory data and the physical location of the from which the data originates, has led to a growth in the need for efficient localisation techniques within Wireless Sensor Networks(WSN). It has ...Read more
Author:Nienaber, S; Kroon, RS; Booysen, MJDate:Dec 2015Consider a single camera mounted on the inside of a vehicle's windscreen used for detecting potholes and other obstacles on the road surface. This paper outlines three approaches to the depth estimation problem of determining the distance to ...Read more
Author:van Zyl, TLDate:Jul 2014We consider the challenge of providing downstream predictions of water quality using a time-series of upstream insitu measurements and a time-series of remote sensed precipitation data from the Tropical Rainfall Measuring Mission (TRMM). We ...Read more
Author:Johnson, DL; Lysko, Albert ADate:Apr 2008Predicting the performance of ad-hoc networking protocols has typically been performed by making use of software based simulation tools. Experimental study and validation of such predictions is vital to obtaining more realistic results, but ...Read more
Author:Zlobinsky, N; Johnson, DL; Mishra, AK; Lysko, Albert ADate:Feb 2022In this work, we evaluate the application of four different metaheuristic optimisation algorithms for solving the channel assignment problem in a multi-radio multi-channel Wireless Mesh Network (WMN) using Dynamic Spectrum Access (DSA). The ...Read more
Author:Golding, D; Tittgemeyer, M; Anwander, A; Douglas, TDate:Nov 2011Diffusion tensor imaging (DTI) and tractography have opened up new avenues in neuroscience. As most applications require precise spatial localization of the fibre images, image registration is an important area of research. Registration is ...Read more