@phdthesis{Scholz2012,
  author    = {Scholz, Markus Reiner},
  title     = {Spin polarization, circular dichroism, and robustness of topological surface states : a photoemission study},
  address   = {Potsdam},
  pages     = {153 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Risse2012,
  author    = {Risse, Sebastian},
  title     = {Physical properties of dipole filled silicones for dielectric elastomer actuators},
  address   = {Potsdam},
  pages     = {146 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Fricke2012,
  author    = {Fricke, Nico},
  title     = {Eine Riesenvesikel-Studie zum Einfluss des Glycolipids GM1 auf Phosopholipid-Membranen},
  address   = {Potsdam},
  pages     = {117 S.},
  year      = {2012},
  language  = {de}
}
@phdthesis{Florian2012,
  author    = {Florian, Alexandra},
  title     = {Dynamic analysis of metabolism under circumstances of altererd photorespiratory flux},
  address   = {Potsdam},
  pages     = {138 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Bidan2012,
  author    = {Bidan, Cecile},
  title     = {Geometric control of tissue growth and organisation},
  address   = {Potsdam},
  pages     = {185 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Keller2012,
  author    = {Keller, Corina},
  title     = {Coupled molecular motors : network representation \& dynamics of kinesin motor pairs},
  address   = {Potsdam},
  pages     = {109, XXX S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Oskinova2012,
  author    = {Oskinova, Lida},
  title     = {A new understanding of the structured winds from massive stars : the implications for their X-ray emission, mass-loss diagnostics, and feedback},
  address   = {Potsdam},
  year      = {2012},
  language  = {en}
}
@phdthesis{Karpitschka2012,
  author    = {Karpitschka, Stefan},
  title     = {Dynamics of liquid interfaces with compositional gradients : sessile drop (non) coalescene and other effects},
  address   = {Potsdam},
  pages     = {135 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Roedig2012,
  author    = {Roedig, Constanze},
  title     = {Massive black hole binaries in gaseous environments},
  address   = {Potsdam},
  pages     = {214 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Skoczowsky2012,
  author    = {Skoczowsky, Danilo},
  title     = {Experimentelle Untersuchungen zur optischen Kopplung von Resonatoren f{\"u}r eine effiziente Frequenzverdopplung},
  address   = {Potsdam},
  pages     = {103 S.},
  year      = {2012},
  language  = {de}
}
@phdthesis{Doumler2012,
  author    = {Doumler, Timur},
  title     = {Constrained local universe simulations from galaxy peculliar velocities},
  address   = {Potsdam},
  pages     = {VI, 221 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{MunozCuartas2012,
  author    = {Mu{\~n}oz Cuartas, Juan Carlos},
  title     = {Proberties of the cosmic mass distribution : halos, environments and galaxies},
  address   = {Potsdam},
  pages     = {153 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Zakharova2012,
  author    = {Zakharova, Anna},
  title     = {Bifurcations in deterministic and stochastic systems and applications to biology},
  address   = {Potsdam},
  pages     = {VI, 69 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Winkelmann2012,
  author    = {Winkelmann, Ricarda},
  title     = {The future sea-level contribution from antartica: projections of solid ice discharge},
  address   = {Potsdam},
  pages     = {140 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Martin2012,
  author    = {Martin, Maria A.},
  title     = {Numerical simulation of the Antartic ice sheet and its dynamic response to external pertubations},
  address   = {Potsdam},
  pages     = {124 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Jasiulek2012,
  author    = {Jasiulek, Michael},
  title     = {Novel geometric methods in numerical relativity for isometric embeddings, quasi-local spin and the wave equation},
  address   = {Potsdam},
  year      = {2012},
  language  = {en}
}
@phdthesis{Anguiano2012,
  author    = {Anguiano, Borja},
  title     = {The age-metallicity-velocity relation in the nearby disk},
  address   = {Potsdam},
  pages     = {164 S.},
  year      = {2012},
  language  = {en}
}
@phdthesis{Scholz2012,
  author    = {Scholz, Markus Reiner},
  title     = {Spin polarization, circular dichroism, and robustness of topological surface states},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-96686},
  school      = {Universit{\"a}t Potsdam},
  pages     = {153},
  year      = {2012},
  abstract  = {Dreidimensionale topologische Isolatoren sind ein neues Materialsystem, welches dadurch charakterisiert ist, dass es in seinem Inneren isolierend an der Ober {\"a}che jedoch leitend ist. Urs{\"a}chlich f{\"u}r die Leitf{\"a}higkeit an der Ober {\"a}che sind sogenannte topologische Ober- {\"a}chenzust{\"a}nde, welche das Valenzband des Inneren mit dem Leitungsband des Inneren verbinden. An der Ober {\"a}che ist also die Bandl{\"u}cke, welche die isolierende Eigenschaft verursacht, geschlossen. Die vorliegende Arbeit untersucht diese Ober {\"a}chenzust{\"a}nde mittels spin- und winkelauf- gel{\"o}ster Photoemissionsspektroskopie. Es wird gezeigt, dass in den Materialien Bi2Se3 und Bi2Te3, in {\"u}bereinstimmung mit der Literatur, die entscheidenden Charakteristika eines topologischen Ober {\"a}chenzustands vorzu nden sind: Die Ober {\"a}chenzust{\"a}nde dieser Sys- teme durchqueren die Bandl{\"u}cke in ungerader Anzahl, sie sind nicht entartet und weisen folgerichtig eine hohe Spinpolarisation auf. Weiterhin wird durch Aufdampfen diverser Adsorbate gezeigt, dass der Ober {\"a}chenzust{\"a}n- de von Bi2Se3 und Bi2Te3, wie erwartet, extrem robust ist. Ober {\"a}chenzust{\"a}nde topologisch trivialer Systeme erf{\"u}llen diese Eigenschaft nicht; bereits kleine Verunreinigungen k{\"o}n- nen diese Zust{\"a}nde zerst{\"o}ren, bzw. die Ober {\"a}che isolierend machen. Die topologischen Ober {\"a}chenzust{\"a}nde k{\"o}nnen in der vorliegenden Arbeit noch bis zur Detektionsgrenze der experimentellen Messmethode nachgewiesen werden und die Ober {\"a}che bleibt Leitf{\"a}hig. Unter den Adsorbaten be ndet sich auch Eisen, ein bekanntermaßen magnetisches Materi- al. Eine der Grundvoraussetzungen f{\"u}r topologische Isolatoren ist die Zeitumkehrsymme- trie, die Elektronen, welche den topologischen Ober {\"a}chenzustand besetzen, vorschreibt, dass sie eine bestimmte Spinrichtung haben m{\"u}ssen, wenn sie sich beispielsweise nach links bewegen und den entgegengesetzten Spin wenn sie sich nach rechts bewegen. In magnetischen Materialien ist die Zeitumkehrsymmetrie jedoch explizit gebrochen und die gezeigte Robustheit des Ober {\"a}chenzustands gegen magnetische Materialien daher uner- wartet. Die Zeitumkehrsymmetrie sorgt auch daf{\"u}r, dass eine Streuung der Elektronen um 180°, beispielsweise an einem Gitterdefekt oder an einem Phonon strikt verboten ist. Bei einem solchen Streuprozess bleibt die Spinrichtung erhalten, da aber in der Gegenrichtung nur Zust{\"a}nde mit entgegengesetztem Spin vorhanden sind kann das Elektron nicht in diese Richtung gestreut werden. Dieses Prinzip wird anhand der Lebensdauer der durch Pho- toemission angeregten Zust{\"a}nde untersucht. Hierbei wird gezeigt, dass die Kopplung der Elektronen des Ober {\"a}chenzustands von Bi2Te3 an Phononen unerwartet hoch ist und dass sich eine Anisotropie in der Bandstruktur des Selbigen auch in den Lebensdauern der ange- regten Zust{\"a}nde widerspiegelt. Weiterhin wird gezeigt, dass sich die Ein {\"u}sse von magne- tischen und nicht-magnetischen Verunreinigungen auf die Lebensdauern stark voneinander unterscheiden. Im letzten Teil der vorliegenden Arbeit wird untersucht, ob eine Asymmetrie in der Inten- sit{\"a}tsverteilung der winkelaufgel{\"o}sten Photoemissionsspektren, bei Anregung mit zirku- lar polarisiertem Licht, in Bi2Te3 R{\"u}ckschl{\"u}sse auf die Spinpolarisation der Elektronen erlaubt. Bei Variation der Energie des eingestrahlten Lichts wird ein Vorzeichenwechsel der Asymmetrie beobachtet. Daraus l{\"a}sst sich schlussfolgern, dass die Asymmetrie keine R{\"u}ckschl{\"u}sse auf die Spinpolarisation erlaubt.},
  language  = {en}
}
@phdthesis{Ghani2012,
  author    = {Ghani, Fatemeh},
  title     = {Nucleation and growth of unsubstituted metal phthalocyanine films from solution on planar substrates},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-64699},
  school      = {Universit{\"a}t Potsdam},
  year      = {2012},
  abstract  = {Organic solar cells (OSC) are interesting as low cost alternative to conventional solar cells. Unsubstituted Metal-phthalocyanines (Pc) are excellent electron donating molecules for heterojunction OSC. Usually organic solar cells with Pcs are produced by vapor deposition, although solution based deposition (like spin casting) is cheaper and offers more possibilities to control the structure of the film. With solution based deposition several parameters (like temperature, solvent and etc.) affect the self-organized structure formation via nucleation and growth. The reason why vapor deposition is typically used is the poor solubility of the metal-phthalocyanines in most common solvents. Furthermore the process of nucleation and growth of Pc aggregates from solution is not well understood. For preparation of Pc films from solution, it is necessary to find the appropriate solvents, assess the solution deposition techniques, such as dip coating, and spin casting. It is necessary to understand the nucleation and growth process for aggregation/precipitation and to use this knowledge to produce nanostructures appropriate for OSC. This is important because the nanostructure of the films determines their performance. In this thesis, optical absorption and the stability of 8 different unsubstituted metal Pc's were studied quantitatively in 28 different solvents. Among the several solution based deposited thin films produced based on this study, copper phthalocyanine (CuPc) dissolved in trifluoroacetic acid (TFA) is chosen as a model system for an in-depth study. CuPc has sufficient solubility and stability in TFA and upon solution processing forms appropriate structures for OSCs. CuPc molecules aggregate into layers of nanoribbons with a thickness of ~ 1 nm and an adjustable width and length. The morphology and the number of deposited layers in the thin films are controlled by different parameters, like temperature and solution concentration. Material properties of CuPc deposited from TFA are studied in detail via x-ray diffraction, UV-Vis and FT-IR spectroscopy. Atomic force microscopy was used to study the morphology of the dried film. The mechanism of the formation of CuPc nanoribbons from spin casted CuPc/TFA solution in ambient temperature is investigated and explained. The parameters (e.g. solution concentration profile) governing nucleation and growth are calculated based on the spin casting theory of a binary mixture of a nonvolatile solute and evaporative solvent. Based on this and intermolecular interactions between CuPc and substrate a nucleation and growth model is developed explaining the aggregation of CuPc in a supersaturated TFA solution. Finally, a solution processed thin film of CuPc is applied as a donor layer in a functioning bilayer heterojunction OSC and the influence of the structure on OSC performance is studied.},
  language  = {en}
}
@phdthesis{Makarava2012,
  author    = {Makarava, Natallia},
  title     = {Bayesian estimation of self-similarity exponent},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-64099},
  school      = {Universit{\"a}t Potsdam},
  year      = {2012},
  abstract  = {Estimation of the self-similarity exponent has attracted growing interest in recent decades and became a research subject in various fields and disciplines. Real-world data exhibiting self-similar behavior and/or parametrized by self-similarity exponent (in particular Hurst exponent) have been collected in different fields ranging from finance and human sciencies to hydrologic and traffic networks. Such rich classes of possible applications obligates researchers to investigate qualitatively new methods for estimation of the self-similarity exponent as well as identification of long-range dependencies (or long memory). In this thesis I present the Bayesian estimation of the Hurst exponent. In contrast to previous methods, the Bayesian approach allows the possibility to calculate the point estimator and confidence intervals at the same time, bringing significant advantages in data-analysis as discussed in this thesis. Moreover, it is also applicable to short data and unevenly sampled data, thus broadening the range of systems where the estimation of the Hurst exponent is possible. Taking into account that one of the substantial classes of great interest in modeling is the class of Gaussian self-similar processes, this thesis considers the realizations of the processes of fractional Brownian motion and fractional Gaussian noise. Additionally, applications to real-world data, such as the data of water level of the Nile River and fixational eye movements are also discussed.},
  language  = {en}
}