Browsing by Title
Now showing items 2758-2777 of 13483
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Desiccation tolerance and sensitivity of vegetative plant tissue.
(1995)There is a great deal of work currently being done in the field of desiccation tolerance. Generally workers studying desiccation-tolerant plant tissues have concentrated on the mechanisms of desiccation tolerance without ... -
Design analysis of educational technologist's web-based teaching and learning environments in South African higher education institutions.
(2009)According to Goldstuck (2008), there were 4.6 million Internet users in South Africa for 2008 year-end. This corresponds to a penetration rate of 10.5% based on an estimated South Africa population of 43.8 million ... -
Design analysis of the Grade 9 technology curriculum in South Africa.
(2002)During the years of apartheid (pre 1994) there were two main streams that one could follow while studying at school viz. academic or technical. The majority of South African learners followed the more traditional academic ... -
The design and analysis of a kerosene turbopump for a South African commercial launch vehicle.
(2014-09-12)South Africa is one of the few developing countries able to design and build satellites; however it is reliant on other nations to launch them. This research addresses one of the main technological barriers currently ... -
The design and construction of a cryostat for thermal battery investigations.
(2011)A test cryostat was constructed to investigate the potential of a locally made thermal battery. A thermal battery is proposed to be a useful component in the construction of future superconducting fault current limiter ... -
The design and construction of an experimental MgO cold cathode X-ray tube for use in XRF spectrometry.
(2013-05-23)An introduction to the fundamental concepts of X-ray physics and X-ray tube design is given. This discussion also includes a brief description of various X-ray tube types available commercially for a number of different ... -
Design and construction of Meercat : an autonomous indoor and outdoor courier service robot.
(2011)This project details the construction and development of, and experimentation with a mobile service courier robot named Meercat. This robot has been built from the ground up using parts sourced from various places. The ... -
The design and implementation of a classroom-based support programme in trignometry for use by underqualified educators.
(2005)The main purpose of the study was to show the necessity of a classroom-based educator in-service support programme. Educators have unique problems being derived from the uniqueness of their school situations. Thus, the ... -
Design and implementation of a thyristor controlled series capacitor for research laboratory application.
(2003)The power transfer capability of a transmission line is determined by the magnitude of the voltage at each end of the line, angle difference of these voltages and the impedance of the line. This impedance is mainly inductive. ... -
Design and implementation of an on-demand ad-hoc routing algorithm for a positional communication system.
(2003)A mobile ad-hoc network is an autonomous network of mobile devices that are connected via wireless links. In such networks there is no pre-existing infrastructure and nodes are free to move in a random fashion. Due to this ... -
Design and operation of a multistage pressurized fluidized bed combuster.
(1981)A three-stage Pressurized Fluidized Bed Combustor (PFBC) of principal dimensions, O,4Sm internal diameter by4m high was designed and fabricated to burn South African coals, with particular reference to coals unsuitable ... -
Design and optimisation of the sector transport, storage and assembly tooling and procedures of the New Small Wheel for the Atlas Experiment.
This report describes the design of the transport, storage and assembly tooling for the sectors of the ATLAS Experiment’s New Small Wheel. This tooling is to be used during the 2018 Large Hadron Collider’s shutdown, Long ... -
Design and optimization of prototype trip steel smart aircraft bolt.
(2008)Aviation is known to have some of the most stringent structural health monitoring standards in the world. An example of this would be the fact that certain bolts in the aircraft assembly must be periodically removed and ... -
Design and performance analysis of hybrid photovoltaic-thermal grid connected system for residential application.
(2012)High output electrical energy is obtained from photovoltaic (PV) systems subject to high irradiance. However, at high irradiance, the efficiency of PV systems drops due to increase of the temperature of the systems. In ... -
Design and performance simulation of a hybrid sounding rocket.
(2012)Sounding rockets find applications in multiple fields of scientific research including meteorology, astronomy and microgravity. Indigenous sounding rocket technologies are absent on the African continent despite a potential ... -
The design and simulation of routing protocols for mobile ad hoc networks.
(2000)This thesis addresses a novel type of network known as a mobile ad hoc network. A mobile ad hoc network is a collection of entirely mobile nodes that can establish communication in the absence of any fixed infrastructu ... -
The design and synthesis of gold nanoparticles and its interaction with mammalian cells in culture.
(2015-10-06)Cancer is a disease characterized by accelerated cell growth, resulting in healthy tissue being destroyed by the processes of invasion and metastasis. Non-viral gene delivery approaches have been extensively studied as a ... -
The design and testing of soil pressure sensors for in-field agricultural and forestry traffic.
(2005)River stage or flow rates are required for the design and evaluation of hydraulic structures. Most river reaches are ungauged and a methodology is needed to estimate the stages, or rates of flow, at specific locations in ... -
Design challenges facing clinical trials of the effectiveness of new HIV prevention technologies.
(Lippincott Williams & Wilkins., 2012-03-13)Recent successes of antiretroviral pre-exposure prophylaxis (PrEP) in preventing HIV infection have raised questions whether further placebo controlled trials of new HIV-prevention technologies are ethically justifiable. ...
