Th. doct.--Stockholms universiteit, 2003. / Bibliogr. p. 233-256. Index.

Thesis (doctoral)--Ludwig-Maximilian-Universität zu München.

Abstract The study is mainly talking about the interface¡¦s concentration change of the solid(ice)-liquid(water),using an experimental apparatus to measure the gas concentration ahead of the solidification front and building the numerical method to imitate it. When we got the result to match up the production of pores in the interface. With the known the interface¡¦s concentration, we can known the critical radius(Rc) of the instant pores existing, then the change of Gibbs free energy (¡µG) and the change of Helmholtz function(¡µF). To project the situation of pores¡¦ size and quantity from Rc, ¡µG and ¡µF. From the above experimental pictures and other theories, we can predict gas pores appear during solidification, when the gas concentration in the liquid is higher than the gas solubility at a certain location. From the test, there¡¦s super-cooling contained in liquid(Oxygen dissolute in pure water), when the thin boundary layer of the ice-water interface(an unmixed layer) is getting balanced, the supersaturated ratio is about 16, while the distribution coefficient(k) is about 0.065¡Fthe liquid(Carbon dioxide dissolute in pure water), the supersaturated ratio is about 5.5, while the distribution coefficient(k) is about 0.15. The rate of solidification is about 4¡Ñ10-6(m/s), the range pores¡¦ radius in the interface is about 0.05mm¡ã0.5mm¡Aand the critical radius¡¦ range of theory is about 0.0046mm¡ã0.1mm. From the above value¡¦s range, the pores¡¦ radius from the picture of this test is reasonable.

Reproduction de : Thèse de doctorat : Langue et littérature slaves : Lille 3 : 2007. / Résumés en français et en anglais. Titre provenant de l'écran-titre. Bibliographie f. 302-315. Glossaire des noms géographiques.

Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2006. / Includes bibliographical references (leaves 38-41). Also available in electronic version.

An analytic solution to a particular boundary value problem in linear elasticity is presented. The problem considered is that of a circular disc, in plane strain or generalized plane stress, which is loaded quite generally at the perimeter by a set of self equilibrating forces. The disc has a radial crack extending completely from the centre to the perimeter. Three particular load cases are considered: the disc is loaded by uniform radial tension; the disc is pulled by two diametrical concentrated loads with line of action perpendicular to the crack; the disc is pulled by two concentrated forces acting at the mouth of the crack. In each case the stress intensity factor is evaluated and contours of the isochromatics are presented in dimensionless form. The results agree with those derived by other workers but the method presented here is more general, more efficient, and extends the previous results for finite bodies containing cracks. The three load cases have also been applied to the disc when the tip of the crack has been removed by the presence of a concentric hole. New results are presented for the stress concentration factors for a full range of geometric parameters. Finally it is shown how the second and third of the load cases may be used for controlled laboratory tests in the study of fracture and fracture toughness of brittle materials. / Applied Science, Faculty of / Mechanical Engineering, Department of / Graduate

Thesis (M.A.)--Universität Bonn, 2008. / Includes bibliographical references (p. 103-110).

Texte remanié de : Dissertation : Fakultät für Geschichtswissenschaft: Bielefeld--1976, soutenue sous le titre "Selbstbehauptung, Widerstand und Vernichtung--eine Untersuchung zur Entwicklung von Herrschaftsfunktionen und Häflingsverhalten in den nationalsozialistischen Konzentrationslagern" / Résumé en anglais. Bibliogr. p. 318-328. Index.

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