German-American journalist Ottilie Assing was a supporter of radical abolitionism, women's emancipation, and other radical social movements of the 19th century. She and Frederick Douglass were close intellectual collaborators and lovers, and this book provides a first-hand look into her life, love, and politics, through a collection of 80 reports and essays she wrote about life in the United States between 1852 and 1865, as well as 27 of her letters to Douglass from 1870-1879. Lohmann (English and American studies, Indiana U.) supplies an introduction to Assing and her work, as well as notes to each of her essays.

Christoph Lohmann introduces a very general framework for the analysis and design of bound-preserving finite element methods. The results of his in-depth theoretical investigations lead to promising new extensions and modifications of existing algebraic flux correction schemes. The main focus is on new limiting techniques designed to control the range of solution values for advected scalar quantities or the eigenvalue range of symmetric tensors. The author performs a detailed case study for the Folgar-Tucker model of fiber orientation dynamics. Using eigenvalue range preserving limiters and admissible closure approximations, he develops a physics-compatible numerical algorithm for this model.

Christoph Lohmann beschaftigt sich mit numerischen Verfahren fur die Fokker-Planck-Gleichung. Ausgehend von einer Fourierapproximation leitet er notwendige Bedingungen fur die Nichtnegativitat der Wahrscheinlichkeitsdichte und positive Semidefinitheit zugehoeriger Orientierungstensoren her. Unter Verwendung dieser Bedingungen entwickelt der Autor neuartige Korrekturtechniken fur die Fourierkoeffizienten, die zu einer genauen und physikkonformen Approximation der Orientierungstensoren fuhren.