Author:Ashok, AC; Marchington, RF; Mthunzi-Kufa, Patience; Krauss, TF; Dholakia, KDate:Mar 2010The authors describe the realization of integrated optical chromatography, in conjunction with on-chip fluorescence excitation, in a monolithically fabricated poly-dimethylsiloxane (PDMS) microfluidic chip. The unique endlessly-single-mode ...Read more
Author:Singh, A; Karsten, AEDate:Jul 2011Optical Coherence Tomography (OCT) has been used in biomedical applications as a method to non-invasively detect changes occurring in tissue such as the detection of skin cancer. The effect of skin tone on detection of skin cancer has however ...Read more
Author:Karsten, AE; Singh, A; Ndhundhuma, IDate:Jan 2010In this study a commercial FD-OCT (Model OCM1300SS) by Thorlabs Inc., USA was used. This system has the following performance specifications: 1300nm centre operating wavelength, a 110nm 3dB spectral bandwidth, transverse spatial air resolution ...Read more
Author:Mgaga, Sboniso S; Tapamo, JRDate:Dec 2020Latent fingerprints are fingerprint impressions left on the surfaces a finger comes into contact with. They are found in almost every crime scene. Conventionally, latent fingerprints have been obtained using chemicals or physical methods, ...Read more
Author:Jonathan, E; Dam, JSDate:Jul 2008The hand palm is an important human body part primarily for physical manipulation of the environment. For example, palmar hyperhidriotics report a low quality of life due to excessive palmar sweating disrupting normal palm use. As a body part ...Read more
Author:Trichili, A; Rosales-Guzmán, C; Dudley, Angela L; Ndagano, B; Salem, AB; Zghal, M; Forbes, ADate:Jun 2016Mode division multiplexing (MDM) is mooted as a technology to address future bandwidth issues, and has been successfully demonstrated in free space using spatial modes with orbital angular momentum (OAM). To further increase the data transmission ...Read more
Author:Ramkilowan, A; Chetty, N; Lysko, M; Griffith, DDate:Apr 2013Higher water temperatures and nutrient loads, along with forecasted climate changes are expected to result in an increase in the frequency and intensity of eutrophication-linked algal blooms (Bernard, 2010, unpublished). The destructive impact ...Read more
Author:Chetty, N; Ramkilowan, A; Griffith, DJ; Lysko, MDDate:Apr 2013South Africa’s fresh water resources are under threat by Harmful Algal Blooms (HABs). A comprehensive and cost effective method for wide area detection and monitoring of HABs is therefore needed to manage and where possible circumvent the ...Read more
Author:Willers, Cornelius JDate:Sep 2009From its humble beginnings in an optical workshop in the Mowbray office for Triangulation in the 1930s and the subsequent formation of the Division for Optics and Spectroscopy at the National Physical Research Laboratory within the CSIR during ...Read more
Author:Masina, Bathusile N; Forbes, A; DeGama, MPDate:Jul 2009In principle all objects emit thermal radiation as a consequence of their temperature. The thermal radiation emitted by an object depends on its temperature, surface condition and thermal properties. A thermography camera senses the emission ...Read more
Author:Mabena, Chemist M; Roux, FSDate:Jan 2019The evolution of classical optical fields propagating through atmospheric turbulence is investigated under arbitrary conditions. We use the single-phase screen (SPS) method and the infinitesimal propagation equation (IPE), a multiphase screen ...Read more
Author:Kumbhakar, P; Ray, Suprakas S; Stepanov, ALDate:2014Semiconductor and metallic nanomaterials and nanocomposites possess interesting linear absorption, photoluminescence emission, and nonlinear optical properties. Nanomaterials having small particle sizes exhibit enhanced optical emission as ...Read more
Author:Roro, Kittessa T; Tile, N; Forbes, ADate:Dec 2010Nanocomposite thin films are widely used for solar thermal applications. Using carbon nanoparticle containing metal oxide as a spectrally selective solar absorber coating has grown significantly in recent years. Recently, Katumba et al. have ...Read more
Author:Kunert, HW; Govender, M; Machatine, AGJ; Mwakikunga, Bonex W; Niyongabo, PDate:Feb 2014At sufficiently high pressures, wurtzite structure zinc oxide (W-ZnO) can be transformed to the cubic rocksalt (R-ZnO) structure. The R-ZnO exhibits semiconductor behavior with an indirect wide band gap of inline image. The maximum valence ...Read more
Author:Mthunzi-Kufa, PatienceDate:Feb 2010Recently, laser light sources of different regimes have emerged as an essential tool in the biophotonics research area. Classic applications include, for example: manipulating single cells and their subcellular organelles, sorting cells in ...Read more
Author:Masina, Bathusile N; Forbes, ADate:Sep 2010This presentation acknowledges that temperature induces damage in the diamond bits due to friction during the drilling process. The temperature of the diamond sample can be raised by laser heating it.Read more
Author:Bachoo, AK; Le Roux, F; Nicolls, FDate:Apr 2011Optical (visual) tracking is an important research area in computer vision with a wide range of useful and critical applications in defence and industry. The tracking of targets that pose a threat or potential threat to a country's assets and ...Read more