Now showing items 136-155 of 193

  • Radio-optical analysis of extended radio sources in the first look survey field 

    Hons, Claudio Moises Paulo (2010)
    I combine 610 MHz Giant Metrewave Radio Telescope (GMRT) data, 1.4 GHz Very Large Array (VLA) data and 1.4 GHz Westerbork Synthesis Radio Telescope (WSRT) observations, encompassing a ∼ 4 square degree field (sq. deg. ...
  • Radiometric characterisation of vineyard soils, Western Cape, South Africa 

    Mlwilo, Nolasco Anton (University of the Western Cape, 2010)
    This study is aimed at investigating the feasibility of using the radiometric technique as an alternative to traditional methods for determining soil physico-chemical parameters which are important for terroir characterization. ...
  • Radiometric investigation of soil and beach sand in Zanzibar 

    Mohamed, Gharib Hamza (University of the Western Cape, 2020)
    This study presents the results of radiometric investigation of soil and beach sand in Zanzibar. The activity concentration of natural radionuclides (40K, and 232Th and 238U decay products) in beach sand and soil samples ...
  • Radiometric study of soil: the systematic effects 

    Joseph, Angelo Daniel (University of the Western Cape, 2007)
    The natural 238U, 232Th and 40K radioactive content of vineyard soil was measured with an in-situ gamma-ray detector. The activity concentrations measured with the in-situ detector are normalized using the laboratory-determined ...
  • Radon escape from water 

    Mvelase, Mashinga Johannes (University of the Western Cape, 2010)
    This thesis aims to measure the rate of radon loss from water in a systematic way. The dependence on surface area, temperature and concentration will be investigated. The experiments were done at UWC by creating radon using ...
  • Radon exhalation of building materials 

    Wentzel, Farrel Sidney (University of the Western Cape, 2018)
    Public concern about all radiation and radon exhalation from building materials has been highlighted recently. The purpose of this study is to address this public concern and to investigate the contribution of building ...
  • Radon in the Cango Caves 

    Nemangwele, Fhulufhelo (University of the Western Cape, 2005)
    Radon is a naturally occurring radioactive element in the 238U decay series that is found in high concentrations in certain geological formations such as Caves. Exposure to high concentrations of radon has been positively ...
  • Reconstruction of the ionization history from 21cm maps with deep learning 

    Mangena (University of the Western Cape, 2020)
    Upcoming and ongoing 21cm surveys, such as the Square Kilometre Array (SKA), Hydrogen Epoch of Reionization Array (HERA) and Low Frequency Array (LOFAR), will enable imaging of the neutral hydrogen distribution on ...
  • Redshift-space distortions as a probe of dark energy 

    Gouws, Liesbeth-Helena (University of Western Cape, 2014)
    We begin by finding a system of differential equations for the background and linearly perturbed variables in the standard, ɅCDM model, using the Einstein Field Equations, and then solving these numerically. Later, we ...
  • A relativistic analysis of proton-induced knockout reactions from oxygen isotopes with direct and inverse kinematics. 

    Motimele, Kanting Evidence (University of the Western Cape, 2020)
    In this study a complete set of exclusive (~p; 2p) polarization transfer observables of closed-shell oxygen isotopes are calculated using both direct and inverse kinematics using the relativistic plane wave impulse app ...
  • Relativistic corrections to the power spectrum 

    Duniya, Didam Gwazah Adams (University of the Western Cape, 2015)
    The matter power spectrum is key to understanding the growth of large-scale structure in the Universe. Upcoming surveys of galaxies in the optical and HI will probe increasingly large scales, approaching and even exceeding ...
  • Selection and optimization of the seeding procedure prior to the synthesis of Pd-based membranes 

    Mc Donald, Earl (University of the Western Cape, 2014)
    Pd based membranes are known for their incredible selectivity towards H2. In order for Pd membranes to display high H2 selectivity, a defect free layer of Pd needs to be deposited onto a support. Although various fabrication ...
  • Signature splitting and inversion in the 186-194 Au Nuclei predicted by the total routhian surface (TRS) and cranked shell model (CSM) calculations 

    Shirinda, Obed (University of the Western Cape, 2007)
    The nearly oblate deformed Au nuclei show rotational bands built on multi quasiparticle excitations [Bou89, Bou92, Gue03, Gue01, Ven92]. Several of these bands are built on rotationally aligned high-j proton and neutron ...
  • Silicon nanowires by metal-assisted chemical etching and its incorporation into hybrid solar cells 

    Khanyile, Sfiso Zwelisha (University of Western Cape, 2021)
    The rapid increase in global energy demand in recent decades coupled with the adverse environmental impact of conventional fuels has led to a high demand for alternative energy sources that are sustainable and efficient. ...
  • Simulating the neutral hydrogen distribution during cosmic reionization 

    Hassan, Sultan (University of the Western Cape, 2018)
    We improve on the physical treatment of ionising source and sink populations in the large scale semi-numerical simulations by implementing new physically motivated parametrizations taken from high-resolution radiative ...
  • Simulation of silicon and diamond detector systems by GEANT4 simulation techniques 

    Erasmus, Nicholas Rattray (University of the Western Cape, 2014)
    There is a constant need for improvement in nuclear particle detection methods. Silicon surface barrier detectors have proved very valuable during the last decades. Diamond is a viable alternative to silicon as a semiconductor ...
  • Spectrally selective AlXOY/Pt/AlXOY solar absorber coatings for high temprature solar-thermal applications 

    Nuru, Zebib Yenus (University of Western Cape, 2014)
    The limited supply of fossil hydrocarbon resources and the negative impact of CO2 emission on the global environment dictate the increasing usage of renewable energy sources. Concentrating solar power (CSP) systems are the ...
  • Spectroscopy of proton unbound states in 32Cl 

    Kamil, Mohamed (University of the Western Cape, 2019)
    This project aimed to investigate proton unbound states in 32Cl using the 32S(3He; t) charge-exchange reaction. This research is relevant both in the context of nuclear structure and astrophysics. Excited states in 32Cl ...
  • Spin and parity assignment in 152 Gd investigating octupole structures 

    Bvumbi, Suzan Phumudzo (University of Western Cape, 2008)
    The high-spin states of the nucleus 152Gd have been populated via the 152Sm (α, 4n) 152Gd fusion-evaporation reaction at a beam energy of 45MeV. The emitted γ rays were observed with the AFRODITE spectrometer array. The ...
  • Stellar masses of star forming galaxies in clusters 

    Randriamampandry, Solohery Mampionona (University of the Western Cape, 2010)
    We determine the stellar mass of star forming galaxies in the X-ray luminous cluster MS 0451.6-0305 at z ∼ 0.54. The stellar masses are estimated from fitting model spectral energy distributions (SEDs) to deep, optical ...