Thesis (Ph. D.)--University of Santo Tomas, 1966. / Typescript. Vita. Appendices: p. 299-301. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (p. [281]-292).

Thesis--Copenhagen. / Summary in English. Bibliography: [404]-414.

Thesis (Ph.D.)--City University of Hong Kong, 2009. / "Submitted to Department of Mathematics in partial fulfillment of the requirements for the degree of Doctor of Philosophy." Includes bibliographical references (leaves 88-95)

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Securities on movables are one of the major feature of credit mechanisms. / Under domestic law, this type of guarantee is widely used, specifically in France, Great-Britain and Canada, under different forms. On the other hand, due to legal uncertainties surrounding operations bearing an international character, securities on movables are rarely used in international transactions. / Regrettably, this established fact, particularly illustrated by French law, appears to go against modern tendencies to favour the internationalisation of commercial activities. The analysis of the rules of French private international law in the light of the corresponding rules of English and Canadian law allows us to identify the main obstacles in the international traffic of securities on movables and to propose reforms initiatives. / Consequently, the analysis of several ratified or drafted international conventions which are related to some aspects of securities on movables in an international context can bring suitable solutions to problems raised by the internationalisation of securities. This thesis proposes that these international agreements carrying conflict of law rules or uniform substantive law constitute the most promising means of regulating these mechanisms which are directly connected to modern international financing.

Abstract: We study in optimal control the important relation between invariance of the problem under a family of transformations, and the existence of preserved quantities along the Pontryagin extremals. Several extensions of Noether's theorem are given, in the sense which enlarges the scope of its application. The dissertation looks at extending the second Noether's theorem to optimal control problems which are invariant under symmetry depending upon k arbitrary functions of the independent variable and their derivatives up to some order m. Furthermore, we look at the Conservation Laws, i.e. conserved quantities along Euler-Lagrange extremals, which are obtained on the basis of Noether's theorem. And finally we obtain a generalization of Noether's theorem for optimal control problems. The generalization involves a one-parameter family of smooth maps which may depend also on the control and a Lagrangian which is invariant up to an addition of an exact differential. / (M.Sc.) North-West University, Mafikeng Campus, 2005

A systematic study has been made of the factors which influence compressibility in cake filtration. A fully automated dead-end pressure filtration rig was designed, constructed and assembled at Loughborough and used to provide accurate data for an experimental matrix. The parameters investigated included pressure, feed concentration, time, surface charge, size and shape of the particulate material and scale of filtration. A proven electrical resistance measuring technique was used to determine transient solids concentrations through a filtering cake/suspension and subsequently interpret filtration performance. The particulate materials calcite and zinc sulphide dispersed in water were used to span a range of filter cake compressibility. The initial results from experiments using calcite were found to be reproducible and generally followed the expected trends. More compressible materials, such as zinc sulphide, were subsequently filtered at different pHs to investigate the influence of surface charge. Filter cells of different filter sizes were used to examine the influence of scale on filtration. Several curious observations were made such as sudden increases in filtrate rate at apparently stable process conditions and lower concentration measurements near the base of the cake. The importance of considering all scale-up parameters and their relation to each other is highlighted in the work. Further points such as the definition of compressibility over a narrow range of pressure and the structure of the filter cake have been discussed. The results were analysed with the use of conventional and new filtration theories. The conventional and modem theories generally gave good predictions of cake height for all the materials tested but for unstable/compressible suspensions the prediction of the concentration profile was less accurate. The use of the maximum solids concentration value at the base of the cake has been suggested to reduce this error and so help prevent filter under sizing. Results indicating retarded packing compressibility have been discussed along with volume-time data which suggest an influence of scale on filtration. Scale-up constants were found to vary considerably in some cases. Large changes in cake resistance were seen for small changes in cake concentration suggesting a need to use other structural characterising parameters as well as macroscopic cake concentration values. The Koenders and Wakeman model gave good predictions of the first linear part of the volume-time relationships for stable suspensions. Conclusions are drawn on the influence of each of the studied parameters on the filtration of compressible materials.

Université de Paris, 1899, Thesis (doctoral) / At head of title: Faculté de droit de Paris. - Bibliography: p. [200]-203. - OCLC, 13189214. - Reproduction of original from Harvard Law School Library

Thesis(M.S.)--Auburn University, 2006. / Abstract. Includes bibliographic references.