No description available.

No description available.

No description available.

This work is a contribution to the theory of the quantum tunneling effect. In the literature at least two barriers are studied, for which the third-order contribution to the phase - integral asymptotic approximation of the transmission coefficient do not contribute. These are the parabolic barrier and the inverse Morse barrier. In the present work we will show that with a proper choice of the so called base function there is at least one more barrier in this category namely the Eckart-Epstein potential. The fact that the third - order contribution vanishes is a good indication that we have found an optimal choice of the base function, and the treatment to find an optimal base function may be possible to generalize to other classes of potential barriers.    For particles of a low energy compared to the energy near the top of the barrier we obtain a vary low transmission coefficient, which means that the probability for tunneling to occur is very low. There exist some cases, for example that with a double barrier which is transparent, even for certain relatively low energies but no evidence for this kind of transparency for a single barrier has been found. The present work does not give any such evidence. At the same time there are still speculations on cold fusion like effects, which would demand a higher probability for tunneling through for a single barrier.

Den här uppsatsen har till syfte att undersöka om fusioner och fusionsvågor i Sverige mellan 1986 och 2013 kan förklaras av felvärderingsteorin. Enligt teorin uppstår fusioner mellan en köpare som är relativt övervärderad jämfört med målbolaget på en övervärderad marknad. Fusionsvågor uppstår då fusionsaktiviteten under en period är ovanligt hög. Vi undersöker felvärderingen med hjälp av en uppdelad ”Market-to-Book” där två komponenter ingår: en kortsiktig och en långsiktig felvärdering. Ur SDC Platinum extraheras 398 fusionspar mellan 1986 och 2013. Med hjälp av dessa kan fyra fusionsvågor urskiljas över den undersökta tiden. Vidare matchas de 398 fusionspar mot Datastream Version 5.1 vilket ger ett slutgiltigt urval om 33 fusionspar. Resultaten visar att fusioner och fusionsvågor som uppstått i Sverige inte kan förklaras av felvärderingsteorin. Vi anser därför att fusionsaktiviteten i Sverige snarare kan förklaras med hjälp av situationsbaserade orsaker.

No description available.

The behavior of model three phase solid/liquid/liquid systems has been studied in the external fields of shear or gravity. Observations of the deformation and break-up of solid-liquid clusters in a simple shear field has led to an investigation of various aspects of separation and coalescence phenomena: the interaction of solid particles and drops in simple shear, film thinning processes, the thermodynamics of engulfment and solid-liquid separation by the external fields. / A microrheological approach was used to determine which parameters are important to the behavior of these systems in simple shear. Among the most important were found to be the liquid/liquid interfacial tension, the incidence of three phase contact and/or the wettability of the solid surface. / The importance of these paramters was also investigated in the formation and stability of sphere-drop systems in a gravitational field, and the detachment of the liquid drop by surface and gravitational forces. / Extensions to existing theory have been made to include gravitational effects in the thinning of a liquid film which forms around a sphere. Finally, an asymptotic solution to the Laplace equation of capillarity has been developed which may be applied to various axisymmetric liquid/fluid interfaces not too far from spherical shape. / The findings in this thesis are highly relevant to various industrial processes (such as in the production of oil, minerals, paper, etc.) where three phase systems are encountered.

Thesis (Ph. D.)--Oregon State University, 1989. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.

Zugl.: Hamburg, Univ., Diss., 2005

Zugl.: München, University der Bundeswehr, Diss., 2006.