Browsing College of Agriculture, Engineering and Science by Title
Now showing items 831-850 of 4216
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D-optimal designs for drug synergy.
(2009)This thesis is fo cused on the construction of optimal designs for detecting drug interaction using the two-variable binary logistic mo del. Two sp eci c mo dels are considered: (1) the binary two-variable logistic mo del ... -
Dairy constraint analysis in Eritrea, with special emphasis on Asmara and surrounding dairy farms.
(2014-11-28)The overall objective of the study reported in this thesis was to assess the existing situation of the dairy sub-sector in Eritrea with special emphasis on the Asmara and surrounding dairy farms. The specific objective ... -
Data base optimisation for an I.C. design layout package on the VAX.
(1987)The performance of an interactive graphics/computer aided design system, such as the IC layout and rule checking package implemented as part of the schematic drawing application on the Gerber Systems Technology IDS-80, ... -
Data classification using genetic programming.
(2015)Genetic programming (GP), a field of artificial intelligence, is an evolutionary algorithm which evolves a population of trees which represent programs. These programs are used to solve problems. This dissertation ... -
A database based information system for artisanal fisheries management : a case study of Moma-Angoche in Mozambique
(2007)Sound management of information and data is an essential cornerstone for efficient and effective decision making. Structured, up to date and easily retrievable data from several heterogeneous sources is often required to ... -
DC coronation electroporation.
(2015)Cells are surrounded by a semi-permeable bilayer lipid membrane that acts as a barrier against the entry of foreign molecules. In the fields of molecular biology, biotechnology, and medicine, the ability to breach the cell ... -
Debugging and repair of description logic ontologies.
(2010)In logic-based Knowledge Representation and Reasoning (KRR), ontologies are used to represent knowledge about a particular domain of interest in a precise way. The building blocks of ontologies include concepts, relations ... -
Deep row trenching of pit latrine and waste water treatment works sludge : water and nutrient fluxes in forest plantations.
(2013-11-19)The deep row trenching of ventilated improved pit-latrine (VIP) and waste water treatment works (WWTW) sludge is a unique alternative cost effective land application method that will prevent odour and health problems and ... -
Defining small catchment runoff responses using hillslope hydrological process observations.
(2000)The Umzimvubu catchment on the eastern coastal escarpment of South Africa is sensitive to anthropogenic influences,with commercial and subsistence agriculture, irrigation, domestic and rural settlements and forestry ... -
Defining the spectral characteristics of rocks within the Mambulu Complex, Natal Belt, South Africa.
(2013-10-17)Field and laboratory spectroscopy are sub-fields of remote sensing, where the radiometric data of materials are individually measured either where the materials occur in situ or in a controlled laboratory environment. Both ... -
Definition of soil water dynamics by combining hydrometry and geophysics in a hillslope transect in the KNP.
(2006)The budgeting of water fluxes in the soil is an extremely complex problem, and is compounded by subsurface controls and environmental forces which modify the soil water dynamics. Of the controlling factors, the underlying ... -
Degradation parameters and modelling of degradation rate in the rumen of cattle fed non-supplemented roughages.
(2015)Feeding of animal has become increasingly a big challenge in livestock production systems as it is the most costly input. Ruminants are very important to mankind because they can convert fibre-rich vegetation into high ... -
Degree theory in nonlinear functional analysis.
(2013-10-21)The objective of this dissertation is to expand on the proofs and concepts of Degree Theory, dealt with in chapters 1 and 2 of Deimling [28], to make it more readable and accessible to anyone who is interested in the ... -
Delegate perceptions and responsible environmental behaviour at the COP 17 event.
(2013)The attitudes, perceptions and environmentally responsible behaviour of delegates (tourists) at the 17th Conference of the Parties (COP 17) to the United Nations Framework Convention on Climate Change (UNFCCC) is an area ... -
A demand analysis of farm labour employment in the south coast and midlands commercial sugarcane farming by labour categories : implications of the sectoral determination.
(2016)The objective of this study is to investigate the impact of changes to the regulatory environme nt governing farm labour employment since the mid-1990s on wages and employment of farm workers in the South African sugar ... -
A demand analysis of labour in South African agriculture : the effects of labour legislation.
(2006)Labour legislation was introduced into agriculture in the early 1990s with the Basic Conditions of Employment Act (BCEA) being gazetted in 1992. Since the mid-1990s "new" labour legislation pertaining to agriculture has ... -
Demand and supply factors in the export of South African fresh oranges to the European Union (EU) : 1976-1993.
(2014-12-23)This is the first empirical study of the factors affecting the demand for and supply of South African (SA) fresh orange exports into the five main European Union (EU) markets: the United Kingdom (UK), France, Germany, ... -
Denitrification of high strength landfill leachate using garden refuse compost and pine bark.
(2016-03-15)Landfill leachate, a toxic by-product formed through the decomposition of organic matter, is harmful to the environment and human health. After nitrification, the concentration of nitrate in discharged leachate may still ... -
Denitrification of high strength nitrified landfill leachate using raw and lightly composted commercial garden refuse (CGR) as carbon sources.
(2013-09-23)Waste is commonly disposed in landfills, this result in the formation of leachate which needs to be treated to acceptable standards before being discharged to the environment. High concentrations of pollutants, particularly ... -
Denitrification of leachate using domestic waste at different levels of stability : simulations in batch test.
(2013-11-01)Disposing of waste on land has been a method practiced by many countries because it is relatively inexpensive. This has led to the fast increase of landfilling option which is also due to increase of waste generation, ...
