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Mapping of marine benthic flora using remote sensing techniques has, over the past decade, been used to locate environmentally stressed areas in the South Australian marine environment. These studies used panchromatic/colour aerial photography and/or medium resolution multispectral satellite imagery to create a time series showing location and rate of seagrass loss. While successful within their project parameters, these studies were limited by conditions at time of image capture, such as sun-glare, wave action and low contrast in deeper waters due to absorption and scattering. This research thesis reports the successful use of polarisation on the capture of visible and near infra-red optical imagery as a method to minimise these limiting factors. Two experimental test flights were undertaken using commercial off-the-shelf digital cameras mounted in the camera port of a light aircraft. The first flight compared vertical polarisation using co-mounted visible and infra-red cameras. The second flight compared vertical and horizontal polarisation using co-mounted identical visible spectrum cameras. The main finding of this series of airborne polarisation experiments is that sea surface reflection is removed by using vertically polarised filters at, and around, the Brewster angle of 53 degrees off nadir, especially when viewing sunwards. The effect is the same in the visible and infra-red parts of the spectrum. This reflection includes sky reflectance, lambertian sun glare, reflection due to wave action, and turbulence, but not direct solar specular reflection. Vertical polarisation filters improve the imaging of benthic flora compared to horizontally polarised imagery and, by extension, non-polarised imagery. The successful use of polarisation to remove surface reflectance over water is limited to imagery captured at or near the Brewster angle. By using successive overlapping frames this can be achieved, as shown by the experiments. Ideally all of the image should be at the Brewster angle. A conceptual design for a conical optical scanner which builds wide-swath imagery where each pixel in each band is solely a record of the vertically polarised signal at the Brewster Angle is presented as a result of these experiments. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1374494 / Thesis (M.Sc.) - University of Adelaide, School of Earth and Environmental Sciences, 2009

Stuttgart, Univ., Diss., 2003.

Zugl.: Paderborn, Universiẗat-Gesamthochsch., Diss., 1997.

Universiẗat, Diss., 2004--Heidelberg.

Th. 3e cycle--Méc.--Toulouse--I.N.P., 1977. N°: 18.

The high level of inequality in South Africa remains one of the biggest problems facing the country. Inequality is not limited to income and can be found in infrastructure, health and education as part of the heritage of apartheid. Polarisation is related to inequality with increases in high- and low-earning jobs, while middle-earning jobs remain stagnant or even decline. This study will try to identify polarisation in the South African labour market since the end of apartheid by making use of the Post-Apartheid Labour Market Series that uses a compilation of Statistics South Africa data ranging from 1994 to 2012. The study finds some evidence of polarisation of employment and earnings in South Africa and the growth of the tertiary sector and the public sector in the country has meant gains in the middle of the distribution for people with a Grade 12 education. Relatively strong unions and the introduction of minimum wages have helped those at the bottom to catch up with the middle. / MCom (Economics), North-West University, Potchefstroom Campus, 2015

The high level of inequality in South Africa remains one of the biggest problems facing the country. Inequality is not limited to income and can be found in infrastructure, health and education as part of the heritage of apartheid. Polarisation is related to inequality with increases in high- and low-earning jobs, while middle-earning jobs remain stagnant or even decline. This study will try to identify polarisation in the South African labour market since the end of apartheid by making use of the Post-Apartheid Labour Market Series that uses a compilation of Statistics South Africa data ranging from 1994 to 2012. The study finds some evidence of polarisation of employment and earnings in South Africa and the growth of the tertiary sector and the public sector in the country has meant gains in the middle of the distribution for people with a Grade 12 education. Relatively strong unions and the introduction of minimum wages have helped those at the bottom to catch up with the middle. / MCom (Economics), North-West University, Potchefstroom Campus, 2015

No description available.