Thesis (Ph. D.)--Carleton University, 2001. / Includes bibliographical references (p. 311-326). Also available in electronic format on the Internet.

Thesis (Ph. D.)--Columbia University, 1944. / "First edition." Published also without thesis note. Vita. "Selected bibliography": p. 419-430.

Thesis (Ph. D.)--Columbia University, 1944. / "First edition." Published also without thesis note. Vita. "Selected bibliography": p. 419-430.

Doctorat en sciences sociales, politiques et économiques / info:eu-repo/semantics/nonPublished

Submitted in fulfillment of the requirements of the degree of Master of Engineering: Mechanical Engineering, Durban University of Technology, Durban, South Africa, 2016. / Pneumatic tyres are of major importance in the modern life. It is estimated that over one billion tyres are manufactured worldwide annually. The manufacturing process is rather power consuming one, mainly to a curing operation taking place in a press dome. The tyre compression mould warm up process is a powerful heat transfer technique. Saturated steam is fed into a press dome to directly transfer heat energy into the prismatic container through convection and conduction heat transfer. This dissertation concerns the work done at Apollo-Dunlop tyres, the tyre compression mould warm up process was optimised to reduce the high energy cost. A heat transfer numerical analysis was carried out to investigate the steam quantity required to warm up the tyre compression mould from an ambient temperature ( ) to operational temperature ( ). Thereafter, an experimental work was performed to investigate the actual duration required to warm up the tyre compression mould to the operational temperature. This was achieved by establishing a temperature profile of the tyre compression mould during the warm up session. The numerical analysis and the experimental results were correlated to create a new warm up process with reduced steam consumption and warm up duration. The new warm up process was tested and the results are furnished in this study (see Appendix B for the performance results sheet). Apollo-Dunlop tyres (Pty) Ltd reduced a five hour tyre compression mould warm up process to a three hour process. The implementation of the proposed reduced warm up process occurred after the research work in this paper was presented to Apollo-Dunlop tyres (Pty) Ltd board members. This work was acknowledged by the company management and a new technological process has been implemented (Appendix A for the relevant documents, note: the specifications sheet show the warm-up duration as four hours, but the actual operational warm up duration is five hours). A cost saving analysis on energy usage was carried out to indicate that Apollo–Dunlop tyres will currently save approximately around about 0.64 million per year after implementing this study. / M

Thesis (M.A.)--Youngstown State University, 2008. / Includes bibliographical references (leaves 113-117). Also available via the World Wide Web in PDF format.

Thesis (M.A.)--University of Florida, 2001. / Title from title page of source document. Includes bibliographical references.

The popularity of natural rubber as an important raw material was distorted in the post-World War Two period. It received heavy competition from synthetic rubber. The main purpose of this paper is to determine and to study supply elasticity and demand elasticity of natural rubber in the case of Malaysia. The main aim of analyzing the period since 1971 is that both price and quality competitiveness of Malaysian natural rubber have drastically improved. Therefore, in order for Malaysia to maintain her position as the leading producer and exporter of natural rubber in the world, supportive policies and incentives from the government would further enhance the prospects for improvements in this industry.

In this study of the development of the sugar, rubber, and cotton industries in Brazil, the writer proposes to show the development of these industries from the beginning of the industries to about 1947.

M. Tech., (Chemical Engineering, Department of Chemical Engineering, Faculty of Engineering and Technology Vaal University of Technology| / The methods used to remove potassium sulphate (K2S04) and other impurities contained within Karbochem finishing plant effluent were investigated. Reverse osmosis was explored for this application. The study was conducted in two steps. The first step focuses mainly on the effluent treatment using BW30 flatsheet as well as BW30-2540 spiral-wound reverse osmosis membranes for the rejection of potassium and sulphate ions. The membranes were supplied by Filmtec. The second step reveals the possible use of potassium sulphate obtained from the brine stream in the fertiliser and fertigation industry by a literature search. Reverse osmosis study was conducted on a laboratory scale unit using flat sheet membranes and also on a pilot plant scale using spiral wound membrane modules. The tests were conducted at a feed pressure of 20 bar(g) with the membrane rejections being 98% and 99.1% on flat sheet membrane, and 96.9% and 99.4% on spiral wound membrane for potassium and sulphates respectively. The results show that both membranes have completely desalinated. Significant reduction in the concentrations of all problematic quality parameters, especially of potassium and the sulphate ions was noted. Granular activated carbon (GAC) bed treatment was recommended for pretreatment of the effluent prior to exposure of the membrane to avoid organic fouling of the membrane. GAC treatment was tested to illustrate its effectiveness to adsorb the COD's. / NRF