ABSTRACT Luxury goods, used in mediaeva1 long distance trade ca. AD 900-1250, found an important market among the Iron Age peoples of southern Africa. Indirect evidence of this trade can be seen in the form of archaeological collections of glass beads at sites throughout Africa and Southeast Asia. Thousands of beads have been found at Iron Age sites in the eastern Transvaal Lowveld and at inland sites along the Limpopo Valley and in Botswana. Similar looking types of beads, referred to as sma...
Abstract Although the phytoplankton of the waters off the west coast of South Africa (the Benguela Current region) s ha .. been the subject of several detailed studies in the past, data on that of the s.w. Indian Ocean has been almost entirely restricted to incidental references in the reports of expeditions which have passed through the area. Consequently, little has been known of the species composition and distribution of the phytoplankton, and nothing of its seasonal fluctuations. This st...
The Analysis Of Late Stone Age Hafting Cements From The Cape Province, South Africa
Abstract The work of Hotz showed the lack of knowledge of the behaviour of electrolytes in acetone solutions as well as the uncertainty as to the pos~ibility of preparing anhydrous acetone and the stability of this solvent, if it could be prepared. An extensive study was therefore undertaken in which the efficiency of various desiccants vJas studied in producing acetone as anhydrous as could be obtained. A very efficient still was designed and the average water content of the acetone produced...
CONTENTS SUMMARY THE AMPHIPODA OF SOUTHERN AFRICA 1 Part 1. Part 2. Part 3. Part 4. Part 5. The Gammaridea and Capre11idea of ' southe.rn Mo~ambique. Ann.S.Afr.Mus. 60 : 265-306. The Gammaridea and Capre11idea of South West Africa south of 200 S. -An-n.-S.-Af-r.M-u-s. -62 : 169-208. The Gammaridea and Capre11idea of Natal . -An-n.-S.-Af-r.M-u-s. 62 : 209-264. The Gammaridea and Capre11idea of the Cape Province east of Cape Agulhas Ann.~.Afr.Mus. 65 : 251-336. The Gammaridea and Capre11idea of...
Abstract This thesis presents the design and implementation of a signal level simulator supporting a wide variety of radar systems, and focusing on multistatic and netted radars. The simulator places few limits on the simulated system, and supports systems with arbitrary numbers of receivers, transmitters, and scatterers. Similarly, the simulator places no restrictions on the radar waveform to be simulated, and supports pulsed, continuous wave (CW) and carrier-free radar systems. A exible mod...
Abstract Diisopropyl ether (DIPE) was synthesised in a single step from a feed of propylene and water over Amberlyst 15 ion exchange resin catalyst. It was produced in a trickle bed reactor at pressures between 1 bar and 60 bar, at temperatures between 70°C and 160°C and at overall propylene to water ratios between 1 : 5 and 10 : 1. Reaction proceeded in the liquid phase within the catalyst particles. The only reactions that occurred in the system were the hydration of propylene to form is...
Abstract This investigation was undertaken to find the optimum hydraulic fluids and materials for combating cavitation erosion in hydraulic mining machinery operating,on 5:95 oil-in-water emulsions, Controlled cavitation was generated in the laboratory in a vibratory cavitation apparatus employing the stationery specimen system. The influence of separation distance between the drill tip and specimen and of varying medium temperature on cavitation erosion were also investigated but were of sec...
Abstract Asset pricing models are well established and have been used extensively by practitioners both for pricing options as well as for hedging them. Though Black-Scholes is the original and most commonly communicated asset pricing model, alternative asset pricing models which incorporate additional features have since been developed. We present three asset pricing models here - the Black-Scholes model, the Heston model and the Merton (1976) model. For each asset pricing model we test the...
Abstract This study analyses the level of student engagement at youth skills development organisations which are situated in low-income, high-stress communities. It asks the following questions: What motivates youth to be engaged in their learning environments? What are youths reporting on experiencing while in the learning environment? How might we use this data to help us develop the skills of the youth better? Through capturing a day in the life of youth from a cognitive, emotional and co...
Abstract This research looks to understand the role digital media plays to inspire and sustain sports participation and how digital media could be used as a socially inclusive tool. The study explores if strategically packaged digital media could be used in a socially inclusive way to increase or sustain sports participation. This would address one of the problems facing sports organisations, as sports participation is decreasing or at least stagnating both in South Africa and on a global sca...
ABSTRACT The Tiv concept of power-sharing, ya na angbian, is a socio-political philosophy that the Tiv have been practising since the pre-colonial era. However, little effort has been made to explore the philosophical element of thisphilosophy. In this exposè, the researcher traces the roots of ya na angbian from the ethico-metaphysical perspective, narrowing it to the Tiv cosmology and ontological order, Tiv ethics and established the point of departure for the practice of the principle. ...
Abstract Suffering and its opposite, happiness, are the basic push and pull of every human action, thus their centrality in human existence. In the 6th century B.C, Gotama Siddhatta, who later became the Buddha, was struck by the reality of human suffering. For this, he abandoned all in his youth in the search for a solution to this problem. Following his enlightenment, he came to the conclusion that: firstly, life is simply suffering; secondly, the cause of human suffering is desire or crav...
EXTENDED ABSTRACT In an effort to unlock the productive potential of the agricultural sector in Nigeria, in 2011 the government implemented the Growth Enhancement Support Scheme (GESS) in all the thirty six states of Nigeria including Abuja Federal Capital Territory. GESS is an innovative input subsidy programme that uses phone technology to reach farmers directly with subsidized fertilizer and improved maize seeds. The overall objective of GESS programme was to raise the productivity of mil...
EXTENDED ABSTRACT Gender Mainstreaming Strategies (GMSs) have the potentiality for reducing gender gaps and hence enhancing gender equality in Local Government Authorities (LGAs). However, studies have not reached consensus on whether the internationally and nationally planned GMSs have significant effect on the intended achieved gender equality among LGA officials. This study was conducted in Dodoma Municipality and Mpwapwa District by capturing urban and rural settings respectively in Tanz...