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Now showing items 21-30 of 62
Towards stimuli-responsive functional nanocomposites: smart tunable plasmonic nanostructures Au-VO2
(University of the Western Cape, 2010)
The fascinating optical properties of metallic nanostructures, dominated by collective oscillations of free electrons known as plasmons, open new opportunities for the development of devices fabrication based on noble metal ...
Spectrally selective AlXOY/Pt/AlXOY solar absorber coatings for high temprature solar-thermal applications
(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 ...
Optical modeling of amorphous and metal induced crystallized silicon with an effective medium approximation
(University of the Western Cape, 2009)
In this thesis we report on the metal-mediated-thermally induced changes of the structural and optical properties of hydrogenated amorphous silicon deposited by hot-wire CVD, where aluminium and nickel were used to induce ...
Measurements and applications of radon in South African aquifer and river waters
(University of the Western Cape, 2009)
In the natural decay series of 238U an inert radioactive gas, 222Rn (radon) is formed in the decay of 226Ra. Because radon is relatively soluble in water, it migrates from places of its generation in rocks and soils to ...
Clustering studies of radio-selected galaxies
(University of the Western Cape, 2011)
We investigate the clustering of HI-selected galaxies in the ALFALFA survey and compare results with those obtained for HIPASS. Measurements of the angular correlation function and the inferred 3D-clustering are compared ...
Simulating the neutral hydrogen distribution during cosmic reionization
(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 ...
The observed bispectrum for SKA and other galaxy surveys
(University of the Western Cape, 2019)
Next-generation galaxy surveys will usher in a new era of high precision cosmology.
They will increasingly rely on the galaxy bispectrum to provide improved constraints
on the key parameters of a cosmological model to ...
New Collective structures in the Z=76 stable odd neutron nucleus, 187Os
(University of the Western Cape, 2021)
Low- and medium-spin bands of 187Os have been studied using the AFRODITE array, following the 186W(4He,3n)187Os reaction at a beam energy of 37 MeV. The measurements of γ − γ coincidences, angular distribution ratios (RAD), ...
Imprints of Primordial Non-Gaussianity on Large Scale Structure in the Universe
(University of the Western Cape, 2016)
Large scale structure in the universe is one of the most important probing tools for
cosmological modelling. Assuming the hot big bang model of the universe, the expansion
history has undergone two phases of acceleration. ...
A large-scale clustering analysis of radio galaxies
(University of the Western Cape, 2019)
The distribution of the visible structure in the Universe is in part dependent on the
in
uence of the dark matter structure. Measurements of large-scale structure can
therefore be related to the dark matter distribution ...