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No / While managers use a variety of tools, they overwhelmingly continue to use those that are well established and focus on the management of internal and external resources, whereas tools aimed to foster more innovative, dynamic, and ‘blue ocean’ strategies are not widely applied in practice.

A dissertation submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Masters of Science in Engineering. Johannesburg, 2017 / This dissertation presents the zinc recycling of tool grade cemented tungsten scrap material generated during commercial production at Pilot Tools Pty Ltd (South Africa), production of powders and alloys from the zinc recycled materials, and evaluation of the properties of the recycled and un-recycled powders and alloys. Tool grade cemented tungsten carbide inserts were subjected to the zinc recycled process under controlled conditions. Tungsten carbide, cubic (TiC, TaC, NbC, TiCN) carbides and Co were recovered from the recycled scrap material. Two recycled alloys, R and RA, and two un-recycled alloys NS and N were produced following the conventional powder metallurgy route. Alloy R was made from 100 % zinc recycled powder with stoichiometric adjustment of C only, and alloy RA was made from 100% zinc recycled powder with stoichiometric adjustment of C and Co. Alloy N was produced under the same conditions as the recycled alloys R and RA, while alloy NS was produced at commercial level at Pilot Tools Pty Ltd (South Africa) using un-recycled powders. The alloy properties were evaluated following standard procedures for hardmetals. When the zinc recycled material was mechanically disintegrated, about 70 % of the recycled material was recovered as fine powder, while 30% was recovered as coarse oversize particles. The oversize particles were quite tough due to a high Co content, and it was difficult to disintegrate them through milling or repeated zinc recycling. The recycled powders took twice as much time to mill to the desired size as the new un-recycled powders, and had predominantly angular particles, while the new powders had smaller more rounded particles. A cubic free layer (CFL) was formed in all the alloys during sintering, although the recycled alloys R and RA had a narrower CFL compared to the new alloys NS and N. The recycled alloys R and RA had carbide grain size, carbide contiguity, binder mean free path, hardness, fracture toughness and wear rate which were generally within the same ranges as the new un-recycled alloys. / MT2018

The primary goal of any model is to emulate, as closely as possible, the desired behavioral phenomena of the real system but still maintain some tangible qualities between the parameters of the model and the system response. In keeping with this directive, models by their very nature migrate towards increasing complexity and hence quickly become tedious to construct and evaluate. In addition, it is sometimes necessary to employ several different analysis techniques on a particular system, which often requires modification of the model. As a result, the concept of versatile, step-wise automated model generation was realized as a means of transferring some of the laborious tasks of model derivation from the analyst to a suitable program algorithm. The focus of this research is on the construction and verification of an efficient modeling environment that captures the dynamic properties of the system and allows many different analysis techniques to be conveniently implemented. This is accomplished through the implementation of Mathematica by Wolfram Research, Inc.. The presented methodology utilizes rigid body, lumped parameter systems and Lagrange's energy formalism. The modeling environment facilitates versatility by allowing straightforward transformations of the model being developed to different forms and domains. The final results are symbolic expressions derived from the equations of motion. However, this approach is predicated upon the absence of significant low frequency flexible vibration modes in the system. This requirement can be well satisfied in the parallel structure machine tools, the main subject of this research. The modeling environment allows a number of techniques for validation to be readily implemented. This includes intuitive checks at key points during model derivation as well as applications of more traditional experimental validation. In all presented cases the analysis can be performed in the same software package that was used for model development. Integration of the generation, validation, and troubleshooting methodology delineated in this research facilitates development of accurate models that can be applied in structure design and exploitation. Possible applications of these models include parameter identification, visualization of vibration, automated supervision and monitoring, and design of advanced control strategies for minimization of dynamic tool path errors. The benefits are especially prevalent in parallel structure machine tools, where there is still a lack of experience. Latest developments in measurement techniques and the emergence of new sensors facilitate reliable validation and optimization of the models. / Graduation date: 1999

Intercontinental similarities in microblade technology have long been used as evidence in support of the hypothesis that human populations migrated from East Asia to northwestern North America during the late Pleistocene. This study synthesizes the available data in an effort to provide a preliminary overview of this technological tradition. Comparative analysis reveals that wedge-shaped cores from Chinese Upper Paleolithic assemblages, the Dyuktai Culture of eastern Siberia, Japan, and the American Paleo-Arctic Tradition of Alaska share many similarities in the selection of raw materials, core morphology, platform preparation and rejuvenation, and edge angle variation. However, it also reveals that Alaskan wedge-shaped cores are more closely related to Dyuktai Culture cores than they are to Hokkaido cores. The study concludes that the distribution of microblade complexes is best explained by migration and/or diffusion from inland Asia to North America during the late Pleistocene.

No description available.

No description available.

Submitted in fulfilment of the requirement for the Masters Degree of Technology: Public Relations Management, Durban University of Technology, 2013. / In South Africa, the competition between shopping centres has increased significantly over the years due to the increase in the number of shopping centres and the changing shopping behaviour. The success of any shopping centre depends on the revenue generated by customers who frequent the mall to make purchases or use the services of the retail/entertainment outlets. To attract customers to shopping centres, management has to ensure that malls are effectively promoted to relevant stakeholders. Communication is important in any promotional, public relations or marketing activity and should be effective, persuasive and managed in a formal and structured way which fits into the overall goals of the mall. Shopping centre management may use a number of communication tools such as (and are not limited to) advertising, sales promotions, public relations, personal selling and sponsorship. However, do these strategies play a role in generating revenue to promote the overall success of a shopping centre? This dissertation, therefore, sets out to identify and examine the communication tools used by shopping centre managers within the greater Durban area in South Africa. It does so by interviewing marketing managers and the tenant mix of five competitive shopping centres within the greater Durban area in South Africa. Data will be collected from the respondents through questionnaires and an interview schedule. One of the significant results emerging from this study is that the function of tenant relations; promotions; publicity; and public relations plays an integral part in the effective functioning of a shopping centre.

Thesis (M.S.)--Ohio University, June, 1996. / Title from PDF t.p.

Thesis (Ph.D.)--University of Wollongong, 2008. / Typescript. Includes bibliographical references: p. 227-238.