@misc{WirthNeumannAntoniettietal.2014,
  author    = {Wirth, Jonas and Neumann, Rainer and Antonietti, Markus and Saalfrank, Peter},
  title     = {Adsorption and photocatalytic splitting of water on graphitic carbon nitride},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-74391},
  pages     = {15917 -- 15926},
  year      = {2014},
  abstract  = {Graphitic carbon nitride, g-C₃N₄, is a promising organic photo-catalyst for a variety of redox reactions. In order to improve its efficiency in a systematic manner, however, a fundamental understanding of the microscopic interaction between catalyst, reactants and products is crucial. Here we present a systematic study of water adsorption on g-C₃N₄ by means of density functional theory and the density functional based tight-binding method as a prerequisite for understanding photocatalytic water splitting. We then analyze this prototypical redox reaction on the basis of a thermodynamic model providing an estimate of the overpotential for both water oxidation and H⁺ reduction. While the latter is found to occur readily upon irradiation with visible light, we derive a prohibitive overpotential of 1.56 eV for the water oxidation half reaction, comparing well with the experimental finding that in contrast to H₂ production O₂ evolution is only possible in the presence of oxidation cocatalysts.},
  language  = {en}
}
@article{WirthNeumannAntoniettietal.2014,
  author    = {Wirth, Jonas and Neumann, Rainer and Antonietti, Markus and Saalfrank, Peter},
  title     = {Adsorption and photocatalytic splitting of water on graphitic carbon nitride},
  series = {physical chemistry, chemical physics : PCCP},
  volume    = {2014},
  journal   = {physical chemistry, chemical physics : PCCP},
  number    = {16},
  issn      = {1463-9076},
  doi       = {10.1039/c4cp02021a},
  pages     = {15917 -- 15926},
  year      = {2014},
  abstract  = {Graphitic carbon nitride, g-C₃N₄, is a promising organic photo-catalyst for a variety of redox reactions. In order to improve its efficiency in a systematic manner, however, a fundamental understanding of the microscopic interaction between catalyst, reactants and products is crucial. Here we present a systematic study of water adsorption on g-C₃N₄ by means of density functional theory and the density functional based tight-binding method as a prerequisite for understanding photocatalytic water splitting. We then analyze this prototypical redox reaction on the basis of a thermodynamic model providing an estimate of the overpotential for both water oxidation and H⁺ reduction. While the latter is found to occur readily upon irradiation with visible light, we derive a prohibitive overpotential of 1.56 eV for the water oxidation half reaction, comparing well with the experimental finding that in contrast to H₂ production O₂ evolution is only possible in the presence of oxidation cocatalysts.},
  language  = {en}
}
@article{BanerjeeLipowskySanter2020,
  author    = {Banerjee, Pallavi and Lipowsky, Reinhard and Santer, Mark},
  title     = {Coarse-grained molecular model for the Glycosylphosphatidylinositol anchor with and without protein},
  series = {Journal of Chemical Theory and Computation},
  volume    = {16},
  journal   = {Journal of Chemical Theory and Computation},
  number    = {6},
  publisher = {ACS Publications},
  address   = {Washington DC},
  issn      = {1549-9626},
  doi       = {10.1021/acs.jctc.0c00056},
  pages     = {15},
  year      = {2020},
  abstract  = {Glycosylphosphatidylinositol (GPI) anchors are a unique class of complex glycolipids that anchor a great variety of proteins to the extracellular leaflet of plasma membranes of eukaryotic cells. These anchors can exist either with or without an attached protein called GPI-anchored protein (GPI-AP) both in vitro and in vivo. Although GPIs are known to participate in a broad range of cellular functions, it is to a large extent unknown how these are related to GPI structure and composition. Their conformational flexibility and microheterogeneity make it difficult to study them experimentally. Simplified atomistic models are amenable to all-atom computer simulations in small lipid bilayer patches but not suitable for studying their partitioning and trafficking in complex and heterogeneous membranes. Here, we present a coarse-grained model of the GPI anchor constructed with a modified version of the MARTINI force field that is suited for modeling carbohydrates, proteins, and lipids in an aqueous environment using MARTINI's polarizable water. The nonbonded interactions for sugars were reparametrized by calculating their partitioning free energies between polar and apolar phases. In addition, sugar-sugar interactions were optimized by adjusting the second virial coefficients of osmotic pressures for solutions of glucose, sucrose, and trehalose to match with experimental data. With respect to the conformational dynamics of GPI-anchored green fluorescent protein, the accessible time scales are now at least an order of magnitude larger than for the all-atom system. This is particularly important for fine-tuning the mutual interactions of lipids, carbohydrates, and amino acids when comparing to experimental results. We discuss the prospective use of the coarse-grained GPI model for studying protein-sorting and trafficking in membrane models.},
  language  = {en}
}
@misc{BanerjeeLipowskySanter2020,
  author    = {Banerjee, Pallavi and Lipowsky, Reinhard and Santer, Mark},
  title     = {Coarse-grained molecular model for the Glycosylphosphatidylinositol anchor with and without protein},
  series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {6},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-52374},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-523742},
  pages     = {17},
  year      = {2020},
  abstract  = {Glycosylphosphatidylinositol (GPI) anchors are a unique class of complex glycolipids that anchor a great variety of proteins to the extracellular leaflet of plasma membranes of eukaryotic cells. These anchors can exist either with or without an attached protein called GPI-anchored protein (GPI-AP) both in vitro and in vivo. Although GPIs are known to participate in a broad range of cellular functions, it is to a large extent unknown how these are related to GPI structure and composition. Their conformational flexibility and microheterogeneity make it difficult to study them experimentally. Simplified atomistic models are amenable to all-atom computer simulations in small lipid bilayer patches but not suitable for studying their partitioning and trafficking in complex and heterogeneous membranes. Here, we present a coarse-grained model of the GPI anchor constructed with a modified version of the MARTINI force field that is suited for modeling carbohydrates, proteins, and lipids in an aqueous environment using MARTINI's polarizable water. The nonbonded interactions for sugars were reparametrized by calculating their partitioning free energies between polar and apolar phases. In addition, sugar-sugar interactions were optimized by adjusting the second virial coefficients of osmotic pressures for solutions of glucose, sucrose, and trehalose to match with experimental data. With respect to the conformational dynamics of GPI-anchored green fluorescent protein, the accessible time scales are now at least an order of magnitude larger than for the all-atom system. This is particularly important for fine-tuning the mutual interactions of lipids, carbohydrates, and amino acids when comparing to experimental results. We discuss the prospective use of the coarse-grained GPI model for studying protein-sorting and trafficking in membrane models.},
  language  = {en}
}
@misc{KoehlerZuercher2004,
  author    = {Koehler, Jan and Z{\"u}rcher, Christoph},
  title     = {Der Staat und sein Schatten : zur Institutionalisierung hybrider Staatlichkeit im S{\"u}d-Kaukasus},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-47422},
  year      = {2004},
  abstract  = {This article looks at contemporary Armenia, Georgia, and Azerbaijan and addresses the question of how these states, which suffer from considerable institutional weaknesses, nevertheless retain the ability to control key aspects of statehood, first of all security and a measure of central authority. It is argued that these states invest only in selected aspects of statehood. The needed resources are mobilized by a system of informal taxes, which are then invested in certain selected core functions of statehood. This form of state depends on both formal and informal institutions, which are mutually supportive.},
  language  = {de}
}
@article{BeckerNeumannTetzneretal.2014,
  author    = {Becker, Michael and Neumann, Marko and Tetzner, Julia and B{\"o}se, Susanne and Knoppick, Henrike and Maaz, Kai and Baumert, J{\"u}rgen and Lehmann, Rainer},
  title     = {Development? Effects of the transition into academically selective schools},
  series = {The journal of educational psychology},
  volume    = {106},
  journal   = {The journal of educational psychology},
  number    = {2},
  publisher = {American Psychological Association},
  address   = {Washington},
  issn      = {0022-0663},
  doi       = {10.1037/a0035425},
  pages     = {555 -- 568},
  year      = {2014},
  abstract  = {The present study investigates school context effects on psychosocial characteristics (academic self-concept, peer relations, school satisfaction, and school anxiety) of high-achieving and gifted students. Students who did or did not make an early transition from elementary to secondary schools for high-achieving and gifted students in 5th grade in Berlin, Germany, are compared in their psychosocial development. The sample comprises 155 early-entry students who moved to an academically selective secondary school (Gymnasium) and 3,169 regular students who remained in elementary school until the end of 6th grade. Overall, a complex pattern of psychosocial development emerged for all students, with both positive and negative outcomes being observed. Specifically, the transition into academically selective learning environments seemed to come at some cost for psychosocial development. Propensity score matching analysis isolating the effects of selective school intake and the school context effect itself revealed negative contextual effects of early transition to Gymnasium on academic self-concept and school anxiety; additionally, the positive trend in peer relations observed among regular students was not discernible among early-entry students.},
  language  = {en}
}
@misc{Aphrasidze2004,
  author    = {Aphrasidze, David},
  title     = {Die Polizei in Georgien : Wandel eines Akteurs},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-47390},
  year      = {2004},
  abstract  = {During the violent phases of transformation in post-Soviet Georgia the power of the police passed on to paramilitary groups. Under the rule of president Shevardnadze, however, the police regained a central political role, but it remained embedded in Soviet and pre-Soviet political structures. This becomes visible by looking at the political economy of the police. Informal taxes, purchase of office, and clientelism became established practices within the police. At present, the new government tries to carry out structural reforms in the police sector, which might lead to a break with the current hybrid Georgian state model.},
  language  = {de}
}
@phdthesis{Mangelsdorf2009,
  author    = {Mangelsdorf, Stefan},
  title     = {Die Transformation des Verarbeitenden Gewerbes in Berlin/Brandenburg unter Ber{\"u}cksichtigung der Exporte : eine empirische Analyse mit amtlichen Mikrodaten},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-068-7},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-44414},
  school      = {Universit{\"a}t Potsdam},
  pages     = {241},
  year      = {2009},
  abstract  = {20 Jahre sind mittlerweile vergangen seit die friedliche Protestbewegung zur Abdankung des alten Regimes der Deutschen Demokratischen Republik f{\"u}hrte. Im darauf folgenden Jahre kam es zur Wiedervereinigung der beiden deutschen Staaten. Der anschließende Transformationsprozess ist aufgrund der besonderen Umst{\"a}nde in Deutschland einzigartig unter den ehemaligen sozialistischen Staaten Mittel- und Osteuropas. Der Schwerpunkt dieser Arbeit liegt in der Transformation des Verarbeitenden Gewerbes in den Bundesl{\"a}ndern Berlin und Brandenburg. Mit der Wiedervereinigung der beiden deutschen Staaten ver{\"a}nderte sich die Situation f{\"u}r die Betriebe im ehemals sozialistischen Teil auf dramatische Weise. Die Auswirkungen werden anhand von Makro- und Mikrodaten analysiert. Untersuchungsgegenst{\"a}nde sind verschiedene {\"o}konomische Indikatoren, wie Zahl von Betrieben und Arbeitspl{\"a}tzen, Strukturen (nach Gr{\"o}ße und Branchen), Ums{\"a}tze (im In- und Ausland) sowie Investitionen. Der Vergleich von Brandenburg und Ostberlin mit Westberlin bietet dabei die M{\"o}glichkeit, Aufschluss {\"u}ber den erreichten Stand des Transformationsprozesses zu erhalten. Die Datenbasis dieser Arbeit besteht neben Angaben aus der Volkswirtschaftlichen Gesamtrechnung der L{\"a}nder aus verschiedenen betriebsbasierten Erhebungen der amtlichen Statistik. Der Beobachtungszeitraum umfasst dabei die Jahre 1991 bis 2005. Zur Analyse von Betriebs- und Besch{\"a}ftigungszahlen und ihrer Dynamik steht sogar eine Totalerhebung f{\"u}r die Jahre 1991 bis 2000 zur Verf{\"u}gung. Ein besonderer Schwerpunkt dieser Arbeit ist die Rolle der Exporte f{\"u}r die betriebliche Entwicklung. Die deutsche Wirtschaftspolitik f{\"o}rdert Unternehmen bei ihrem Schritt auf ausl{\"a}ndische M{\"a}rkte, da man sich von Exporten eine Wachstumsstimulation erhofft. Damit eine solche F{\"o}rderung auch langfristige positive Effekte entfalten kann, muss einerseits der Export positiven Einfluss auf das Produktivit{\"a}tswachstum des betreffenden Betriebes haben, und andererseits muss das Exportverhalten eine gewisse Persistenz aufweisen. Beide Bedingungen werden innerhalb der Arbeit detailliert untersucht.},
  language  = {de}
}
@misc{Radseck2005,
  author    = {Radseck, Michael},
  title     = {Die vernachl{\"a}ssigte Reform : zum Primat der Politik {\"u}ber das Milit{\"a}r im s{\"u}dlichenLateinamerika},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-48231},
  year      = {2005},
  abstract  = {Despite many economic and state reforms in South America, no comparable changes have taken place with regard to civil-military relations: Neither do the armed forces have a clearly defined mission of their own nor are they adequately democratically controlled. The article looks at the present civil-military relations from various angles and explicitly deals with examples from Argentina, Bolivia, Chile and Peru. It presents the reasons for the lack of civilian control over the military and discusses the resulting consequences for domestic and foreign politics.},
  language  = {de}
}
@misc{Berg2004,
  author    = {Berg, Andrea},
  title     = {Dynastie oder Demokratie? : Die Personalisierung des Staates in Zentralasien},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-47405},
  year      = {2004},
  abstract  = {The increasing concentration of power in the hands of the presidential families in all Central Asian states led to the personalisation of the state during the last years. The presidents successfully established neo-patrimonial, authoritarian regimes with a high level of consolidation but without fulfilling the criterion of democracy. The article explores the strategies the presidents use to maintain their authority and discusses which political developments can be expected concerning the question of succession.},
  language  = {de}
}
@article{SchifferleLobanov2022,
  author    = {Schifferle, Lukas and Lobanov, Sergey S.},
  title     = {Evolution of chemical bonding and spin-pairing energy in ferropericlase across Its spin transition},
  series = {ACS Earth and Space Chemistry},
  volume    = {6},
  journal   = {ACS Earth and Space Chemistry},
  number    = {3},
  publisher = {American Chemical Society},
  address   = {Washington},
  issn      = {2472-3452},
  doi       = {10.1021/acsearthspacechem.2c00014},
  pages     = {788 -- 799},
  year      = {2022},
  abstract  = {The evolution of chemical bonding in ferropericlase, (Mg,Fe)O, with pressure may affect the physical and chemical properties of the Earth's lower mantle. Here, we report high-pressure optical absorption spectra of single-crystalline ferropericlase ((Mg0.87Fe0.13)O) up to 135 GPa. Combined with a re-evaluation of published partial fluorescence yield X-ray absorption spectroscopy data, we show that the covalency of the Fe-O bond increases with pressure, but the iron spin transition at 57-76.5 GPa reverses this trend. The qualitative crossover in chemical bonding suggests that the spin-pairing transition weakens the Fe-O bond in ferropericlase. We find, that the spin transition in ferropericlase is caused by both the increase of the ligand field-splitting energy and the decrease in the spin-pairing energy of high-spin Fe2+.},
  language  = {en}
}
@misc{Heinz2005,
  author    = {Heinz, Wolfgang S.},
  title     = {Milit{\"a}r und Transition zur Demokratie in Lateinamerika : ein R{\"u}ck- und Ausblick},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-48299},
  year      = {2005},
  abstract  = {Since the beginning of the 1970s a lot of countries in Latin America has been starting the transition to democracy. The article analyses the role played by the military in this process, especially the effects of civildemocratic governments - sometimes failing in - gaining power over the military. It is described how and why the army occasionally kept their independence from the civil power and how this influenced the consolidation of democracy.},
  language  = {de}
}
@misc{Opfer2004,
  author    = {Opfer, Bj{\"o}rn},
  title     = {Organisiertes Verbrechen und politische Transformation in Bulgarien},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-47418},
  year      = {2004},
  abstract  = {Since the late 1960s of the 20th century, Bulgaria experienced a great increase in organized crime. As a result, relations between the managers of state-owned enterprises, the state security service, party officials, and criminal actors grew and became stronger. Parts of the old network are still functioning. Through the support of governmental circles, organized crime became established and dominated essential parts of the economy, from the mid-1990s. Since 1996, however, governments tried to act against organized crime. The influence of the mafia is still an unsolved problem and a challenge to the transformation of the country.},
  language  = {de}
}
@misc{Hensell2004,
  author    = {Hensell, Stephan},
  title     = {Regieren in Albanien : Herrschaftslogik und Zerfall eines Familienstaates},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-11660},
  year      = {2004},
  abstract  = {Taking into account historical as well as sociological differences, the author distinguishes between different modes of socialism. On the periphery of the Soviet Union and Eastern Europe, the combination of modern and traditional elements led to the establishment of hybrid political forms. They could be characterized as bureaucratic-patrimonial and associated with a specific type of state: the "peripheral socialist state".},
  language  = {de}
}
@misc{Geiss2004,
  author    = {Geiß, Paul Georg},
  title     = {Regionalismus und Staatlichkeit in Turkmenistan},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-11650},
  year      = {2004},
  abstract  = {Regionalism in Central Asia is often identified with the dominance of tribal affiliations in politics. This classification, however, is problematic because it neglects the extent of social change under the Soviet rule. In Soviet Turkmenistan state structures were relatively strong. However, personal relations within the Communist party had preserved patrimonial elements within the state. The dissolution of the Soviet Union led to a stronger patrimonialization of authority relations. In Turkmenistan, this process led to an extreme form of a neo-patrimonial state due to the personal and arbitrary rule of its president Nijazov.},
  language  = {de}
}
@phdthesis{Topaj2001,
  author    = {Topaj, Dmitri},
  title     = {Synchronization transitions in complex systems},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-0000367},
  school      = {Universit{\"a}t Potsdam},
  year      = {2001},
  abstract  = {Gegenstand dieser Arbeit ist die Untersuchung generischer Synchronisierungsph{\"a}nomene in interagierenden komplexen Systemen. Diese Ph{\"a}nomene werden u.a. in gekoppelten deterministischen chaotischen Systemen beobachtet. Bei sehr schwachen Interaktionen zwischen individuellen Systemen kann ein {\"U}bergang zum schwach koh{\"a}renten Verhalten der Systeme stattfinden. In gekoppelten zeitkontinuierlichen chaotischen Systemen manifestiert sich dieser {\"U}bergang durch den Effekt der Phasensynchronisierung, in gekoppelten chaotischen zeitdiskreten Systemen durch den Effekt eines nichtverschwindenden makroskopischen Feldes. Der {\"U}bergang zur Koh{\"a}renz in einer Kette lokal gekoppelter Oszillatoren, beschrieben durch Phasengleichungen, wird im Bezug auf die Symmetrien des Systems untersucht. Es wird gezeigt, daß die durch die Symmetrien verursachte Reversibilit{\"a}t des Systems nichttriviale topologische Eigenschaften der Trajektorien bedingt, so daß das als dissipativ konstruierte System in einem ganzen Parameterbereich quasi-Hamiltonische Z{\"u}ge aufweist, d.h. das Phasenvolumen ist im Schnitt erhalten, und die Lyapunov-Exponenten sind paarweise symmetrisch. Der {\"U}bergang zur Koh{\"a}renz in einem Ensemble global gekoppelter chaotischer Abbildungen wird durch den Verlust der Stabilit{\"a}t des entkoppelten Zustandes beschrieben. Die entwickelte Methode besteht darin, die Selbstkonsistenz des makroskopischen Feldes aufzuheben, und das Ensemble in Analogie mit einem Verst{\"a}rkerschaltkreis mit R{\"u}ckkopplung durch eine komplexe lineare {\"U}bertragungssfunktion zu charakterisieren. Diese Theorie wird anschließend f{\"u}r einige theoretisch interessanten F{\"a}lle verallgemeinert.},
  language  = {en}
}