The Faculty of Mathematics and Natural Sciences: Browsing Mathematisch-Naturwissenschaftliche Fakultät by Title
Now showing items 3988-4007 of 4327
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Underwater flight in sea turtles and plesiosaurs: Dissection, muscle reconstructions, analog models, and finite element structure analyses inform on flipper twisting and muscle forces in plesiosaurs
Krahl, Anna (2020-08-13)This dissertation contributes to our understanding of plesiosaur locomotion by providing foreflipper and hindflipper muscle reconstructions and studying aspects of their muscle physiology (functions, forces, muscle length ... -
Unexpected chromosomal DNA transfer from Agrobacterium tumefaciens to plant cells: mechanisms and solutions
Berson, Tobias (2015-01-09)The soil bacterium and plant pathogen <i>Agrobacterium tumefaciens</i> has the ability to transfer a defined part of its genome, the so called transferred DNA (T-DNA), to plant cells. This transfer has been successfully ... -
Ungewöhnliche titanocenvermittelte Reaktionen
Geich-Gimbel, Daniel (2006)Die Arbeit behandelt radikalische Zyklisierungen die durch Titanocen(III)chlorid katalysiert werden. Epoxide werden unter der von Gansäuer et al. entwickelten Titanocenvermittelten reduktiven Epoxidöffnung homolytisch ... -
A Unified Formation Scenario for the Zoo of Extended Star Clusters and Ultra-Compact Dwarf Galaxies
Brüns, Renate Claudia (2014-07-18)In the last decade, very extended old stellar clusters, which cover a large mass range, have been found in various types of galaxies in different environments. Objects with masses comparable to normal globular clusters ... -
Uniform Boundedness of Pole Order of General Eisenstein Series
Kuchaki Shalmani, Kiarash (2020-08-24)This work consists of two parts. In the first part we give a general introduction to the chapter 7 of [L1], and settle down some bases needed for the second chapter in which we prove that the order of the poles of a residual ... -
Uniform estimates in one- and two-dimensional time-frequency analysis
Warchalski, Michał (2019-02-22)This thesis is concerned with two special cases of the singular Brascamp-Lieb inequality, namely, the trilinear forms corresponding to the one- and two-dimensional bilinear Hilbert transform. In this work we study the ... -
A Unifying Theory for Nonlinear Additively and Multiplicatively Preconditioned Globalization Strategies: Convergence Results and Examples From the Field of Nonlinear Elastostatics and Elastodynamics
Groß, Christian (2009-10-08)Nonlinear right preconditioned globalization strategies for the solution of nonlinear programming problems of the following kind $u \in \mathcal B \subset \mathbb R^n: J(u) = \min!$ where $\mathcal B$ is a convex set of ... -
Uniqueness and Stability near Stationary Solutions for the Thin-Film Equation in Multiple Space Dimensions with Small Initial Lipschitz Perturbations
John, Dominik (2013-12-05)In any number of space variables, we study the Cauchy problem related to the thin-film equation in the simplest case of a linearly degenerate mobility. This equation, derived from a lubrication approximation, also models ... -
Unitary fermionic topological field theory
Stehouwer, Luuk Daniël (2024-02-29)Atiyah's axioms are one way to define rigorously what is a topological quantum field theory. He defined it as a symmetric monoidal functor from a bordism category to the category of vector spaces. To include fermions in ... -
United Elliptic Homology
Meier, Lennart (2012-09-11)We study the categories of modules over real K-theory and TMF. Inspired by work of Bousfield, we consider TMF-modules at the prime 3 which are relatively free with respect to TMF(2). We show that a large class of these can ... -
Universal Toda brackets of ring spectra
Sagave, Steffen (2006)We construct and examine the universal Toda bracket of a highly structured ring spectrum R. This invariant of R is a cohomology class in the Mac Lane cohomology of the graded ring of homotopy groups of R which carries ... -
Universelle Algorithmen zur Portfolio-Optimierung
Lüssem, Jens (2003)In dieser Arbeit werden nicht-klassische Ansätze zur Portfolio-Optimierung untersucht, die auf der kompetitiven Analyse von Online-Algorithmen beruhen. Die vorgestellten Verfahren verzichten damit auf eine stochastische ... -
Universelle elliptische Gauß-Summen und der Algorithmus von Schoof
Berghoff, Christian Johannes (2017-07-21)Die vorliegende Arbeit beschäftigt sich mit verschiedenen neuen Ansätzen im Kontext des Punktezählens auf elliptischen Kurven über endlichen Primkörpern mit großer Charakteristik. Sie baut dabei auf der Grundidee von Schoof ... -
Unraveling Molecular Gas Conditions across Nearby Galaxies with CO Isotopologues
den Brok, Jakob Sebastiaan (2022-12-07)In general, we associate large spatial scales, heavy massive objects, and great distances with the scientific study of Astronomy. However, in this thesis, we study the tiny hydrogen molecule, H<sub>2</sub>, which populates ... -
Unraveling TRIM71-mediated RNA regulatory mechanisms during developmental and oncogenic processes
Torres Fernández, Lucia Anaís (2020-05-18)A dysregulation in the tight control of cell proliferation and differentiation severely affects developmental processes, and can lead to oncogenic transformation in the adult organism. The stem cell-specific protein TRIM71 ... -
Unravelling mechanisms causing astrocytic uncoupling in epilepsy
Deshpande, Tushar (2017-10-06)The dynamic regulation of connexins throughout its life cycle has profound impact on the level of gap junctional coupling in astrocytes. Astrocytic uncoupling in epilepsy can be viewed in the context of modifications in ... -
Unravelling the antimicrobial features of the incompatible solutes creatine and guanidino-ectoine
Waßmann, Kati Christine (2013-10-28)Solutes similar in structure to compatible solutes but with an opposite physiological effect on growth rate were named incompatible solutes. Examples of this class of compounds and main objects of investigation in this ... -
Untersuchung der Adsorption und Koadsorption organischer Moleküle an Platineinkristallelektroden: Ansätze zur Modifizierung von Platineinkristallelektroden
Bussar, Rainer (2007)Ziel dieser Arbeit war es, die Kenntnisse über die Reaktivität modifizierter einkristalliner Platinoberflächen zu vertiefen und mögliche Strategien zur gezielten Modifizierung solcher geordneten, periodisch gestuften ... -
Untersuchung der Angiotensin II-Typ 1-Rezeptor-vermittelten kontraktilen Signalwege in der hepatischen Fibrose
Granzow, Michaela (2013-09-19)In chronischen Leberschäden trägt das Renin-Angiotensin-System (RAS) zur hepatischen Fibrose bei. Daher dient die Erforschung der intrazellulären Signalwege des Angiotensin II-Typ 1-Rezeptors (AT1R) dem besseren Verständnis ... -
Untersuchung der Antwort humaner Endothelzellen auf Substratdeformation
Zielinski, Alexander (2013-04-05)Zellen im Gewebe werden permanent mit mechanischen Reizen konfrontiert. Die Wahrnehmung dieser Reize wird unter dem Begriff der Mechanorezeption zusammengefasst und stellt einen Prozess dar, der sich auf verschiedenste ...