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  • Optical properties of selectively absorbing C/NiO nanocomposite coatings 
    Roro, Kittessa T; Tile, N; Forbes, A (2010-12)
    Nanocomposite 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, ...
  • Optical selection rules and scattering processes in rocksalt wide band gap ZnO 
    Kunert, HW; Govender, M; Machatine, AGJ; Mwakikunga, BW; Niyongabo, P (Wiley-VCH Verlag, 2014-02)
    At 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. ...
  • Optical sorting and photo-transfection of mammalian cells 
    Mthunzi, P (University of St Andrews, 2010-02)
    Recently, 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, ...
  • Optical system to study temperature influenced chemical and mechanical changes to the PCD structure 
    Masina, B; Forbes, A (SAIP 2010, 2010-09)
    This 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.
  • An Optical tracker for the maritime environment 
    Bachoo, AK; Le Roux, F; Nicolls, F (2011-04)
    Optical (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 ...
  • Optical trapping and tweezing using a spatial light modulator 
    Ismail, Y; Mclaren, MG; Forbes, A (2009-07)
    This presentation provides information on optical trapping and tweezing using a spatial light modulator.
  • Optical trapping with Super-Gaussian beams 
    McLaren, M; Khanyile, T; Mthunzi, P; Forbes, A (Optical Society of America, 2013-04)
    We outline the possibility of optical trapping and tweezing with Super-Gaussian beam profiles. We show that the trapping strength can be tuned continuously by adjusting the order of a Super-Gaussian beam, approaching that ...
  • Optical turbulence in a spinning pipe gas lens 
    Mafusire, C; Forbes, A (South African Institute of Physics (SAIP), 2009-07)
    The researchers have managed to do quantitative analysis of ‘controlled’ turbulence. The researchers could control the degree of turbulence by controlling the rotation speed and wall temperature of the spinning pipe gas ...
  • Optically pumped tunable HBr laser in the mid-infrared region 
    Koen, W; Jacobs, Cobus; Bollig, C; Strauss, HJ; Esser, MJD; Botha, LR (Optical Society of America, 2014-06)
    An optically pumped tunable HBr laser has been demonstrated for the first time. The pump source was a single-frequency Ho:YLF laser and amplifier system, which was locked to the 2064 nm absorption line of HBr. Laser ...
  • Optically stimulated luminescence dating at Rose Cottage Cave 
    Pienaar, M; Woodborne, S; Wadley, L (ASSAF, 2008-01)
    Six Optically stimulated luminescence (OSL) dates are compared with stratigraphically associated C-14 dates from Rose Cottage Cave. The OSL dates overlap the accepted C-14 chronology except for one sample that overestimates ...
  • Optimal control of a fuel cell/wind/PV/grid hybrid system with thermal heat pump load 
    Sichilalu, S; Tazvinga, Henerica; Xia, X (Elsevier, 2016-10)
    This paper presents an optimal energy management strategy for a grid-tied photovoltaic–wind-fuel cell hybrid power supply system. The hybrid system meets the load demand consisting of an electrical load and a heat pump ...
  • Optimal control of transmission power management in wireless backbone mesh networks 
    Olwal, TO; Djouani, K; Van Wyk, BJ; Hamam, Y; Siarry, P (InTech Publishers, 2011-01)
    This chapter proposes a scalable singularly perturbed weakly-coupled TPM which is supported at the LL of the network protocol stack. Firstly, the WMN is divided into sets of unified channel graphs (UCGs). A UCG consists ...
  • Optimal exploration target zones 
    Debba, Pravesh; Carranza, EJM; Stein, A; Van der Meer, FD (Free and Open Source Software for Geospatial Conference (FOSS4G), 2008-09)
    This research describes a quantitative methodology for deriving optimal exploration target zones based on a probabilistic mineral prospectivity map. In order to arrive at out objective, we provide a plausible answer to the ...
  • Optimal exploration target zones 
    Debba, Pravesh; Carranza, EJM; Stein, A; Van der Meer, FD (Free and Open Source Software for Geospatial Conference (FOSS4G), 2008-09)
    This research describes a quantitative methodology for deriving optimal exploration target zones based on a probabilistic mineral prospectivity map. In order to arrive at out objective, we provide a plausible answer to the ...
  • Optimal individual supervised hyperspectral band selection distinguishing savannah trees at leaf level 
    Debba, Pravesh; Cho, Moses A; Mathieu, Renaud SA (IEEE, 2009-08)
    This paper uses simulated annealing and focus on the spectral angle mapper (SAM), to demonstrate how the separability of two mean spectra from different species can be increased by choosing the bands that maximize the ...
  • Optimal land-use decisions in the presence of carbon payments and fertilizer subsidies: an Indonesian case study 
    Wise, RM; Cacho, O (2006-08)
    A meta-model was developed in this study to simulate soil-tree-crop interactions under various management regimes for a smallholding in Sumatra. The model was used within a dynamic-programming algorithm to determine ...
  • Optimal placement of range-only beacons for mobile robot localisation 
    Burke, Michael G; Bos, N (2011-11)
    The ability of an agent to self-localise is crucial to any autonomous task where mobility is required. A common set of techniques solving the localisation problem involve the deployment of active beacons or landmarks, which ...
  • Optimal sampling schemes applied in geology 
    Debba, Pravesh (2010-05)
    The presentation was an the University of Pretoria to geology students. It focused on ways to design optimal sampling schemes to target specific minerals.
  • Optimal sampling schemes for vegetation and geological field visits 
    Debba, Pravesh (2012-07)
    The presentation made to Wits Statistics Department was on common classification methods used in the field of remote sensing, and the use of remote sensing to design optimal sampling schemes for field visits with applications ...
  • Optimal spatial sampling scheme to characterize mine tailings 
    Debba, Pravesh; Carranza, EJM; Stein, A; Van der Meer, FD (2009-08)
    This research discusses a novice method for sampling geochemicals to characterize mine tailings. Researchers model the spatial relationships between a multi-element signature and abundance estimates of secondary iron-bearing ...