@phdthesis{Zarafshani2012,
  author    = {Zarafshani, Zoya},
  title     = {Chain-end functionalization and modification of polymers using modular chemical reactions},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59723},
  school      = {Universit{\"a}t Potsdam},
  year      = {2012},
  abstract  = {Taking advantage of ATRP and using functionalized initiators, different functionalities were introduced in both α and ω chain-ends of synthetic polymers. These functionalized polymers could then go through modular synthetic pathways such as click cycloaddition (copper-catalyzed or copper-free) or amidation to couple synthetic polymers to other synthetic polymers, biomolecules or silica monoliths. Using this general strategy and designing these co/polymers so that they are thermoresponsive, yet bioinert and biocompatible with adjustable cloud point values (as it is the case in the present thesis), the whole generated system becomes "smart" and potentially applicable in different branches. The applications which were considered in the present thesis were in polymer post-functionalization (in situ functionalization of micellar aggregates with low and high molecular weight molecules), hydrophilic/hydrophobic tuning, chromatography and bioconjugation (enzyme thermoprecipitation and recovery, improvement of enzyme activity). Different α-functionalized co/polymers containing cholesterol moiety, aldehyde, t-Boc protected amine, TMS-protected alkyne and NHS-activated ester were designed and synthesized in this work.},
  language  = {en}
}
@phdthesis{Wohlgemuth2012,
  author    = {Wohlgemuth, Stephanie-Angelika},
  title     = {Functional nanostructured hydrothermal carbons for sustainable technologies : heteroatom doping and superheated vapor},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60120},
  school      = {Universit{\"a}t Potsdam},
  year      = {2012},
  abstract  = {The underlying motivation for the work carried out for this thesis was the growing need for more sustainable technologies. The aim was to synthesize a "palette" of functional nanomaterials using the established technique of hydrothermal carbonization (HTC). The incredible diversity of HTC was demonstrated together with small but steady advances in how HTC can be manipulated to tailor material properties for specific applications. Two main strategies were used to modify the materials obtained by HTC of glucose, a model precursor representing biomass. The first approach was the introduction of heteroatoms, or "doping" of the carbon framework. Sulfur was for the first time introduced as a dopant in hydrothermal carbon. The synthesis of sulfur and sulfur/nitrogen doped microspheres was presented whereby it was shown that the binding state of sulfur could be influenced by varying the type of sulfur source. Pyrolysis may additionally be used to tune the heteroatom binding states which move to more stable motifs with increasing pyrolysis temperature. Importantly, the presence of aromatic binding states in the as synthesized hydrothermal carbon allows for higher heteroatom retention levels after pyrolysis and hence more efficient use of dopant sources. In this regard, HTC may be considered as an "intermediate" step in the formation of conductive heteroatom doped carbon. To assess the novel hydrothermal carbons in terms of their potential for electrochemical applications, materials with defined nano-architectures and high surface areas were synthesized via templated, as well as template-free routes. Sulfur and/or nitrogen doped carbon hollow spheres (CHS) were synthesized using a polystyrene hard templating approach and doped carbon aerogels (CA) were synthesized using either the albumin directed or borax-mediated hydrothermal carbonization of glucose. Electrochemical testing showed that S/N dual doped CHS and aerogels derived via the albumin approach exhibited superior catalytic performance compared to solely nitrogen or sulfur doped counterparts in the oxygen reduction reaction (ORR) relevant to fuel cells. Using the borax mediated aerogel formation, nitrogen content and surface area could be tuned and a carbon aerogel was engineered to maximize electrochemical performance. The obtained sample exhibited drastically improved current densities compared to a platinum catalyst (but lower onset potential), as well as excellent long term stability. In the second approach HTC was carried out at elevated temperatures (550 °C) and pressure (50 bar), corresponding to the superheated vapor regime (htHTC). It was demonstrated that the carbon materials obtained via htHTC are distinct from those obtained via ltHTC and subsequent pyrolysis at 550 °C. No difference in htHTC-derived material properties could be observed between pentoses and hexoses. The material obtained from a polysaccharide exhibited a slightly lower degree of carbonization but was otherwise similar to the monosaccharide derived samples. It was shown that in addition to thermally induced carbonization at 550 °C, the SHV environment exhibits a catalytic effect on the carbonization process. The resulting materials are chemically inert (i.e. they contain a negligible amount of reactive functional groups) and possess low surface area and electronic conductivity which distinguishes them from carbon obtained from pyrolysis. Compared to the materials presented in the previous chapters on chemical modifications of hydrothermal carbon, this makes them ill-suited candidates for electronic applications like lithium ion batteries or electrocatalysts. However, htHTC derived materials could be interesting for applications that require chemical inertness but do not require specific electronic properties. The final section of this thesis therefore revisited the latex hard templating approach to synthesize carbon hollow spheres using htHTC. However, by using htHTC it was possible to carry out template removal in situ because the second heating step at 550 °C was above the polystyrene latex decomposition temperature. Preliminary tests showed that the CHS could be dispersed in an aqueous polystyrene latex without monomer penetrating into the hollow sphere voids. This leaves the stagnant air inside the CHS intact which in turn is promising for their application in heat and sound insulating coatings. Overall the work carried out in this thesis represents a noteworthy development in demonstrating the great potential of sustainable carbon materials.},
  language  = {en}
}
@article{Peters2012,
  author    = {Peters, Friedrich Ernst},
  title     = {Jochen Pahl un de Subrekter},
  series = {Digitale Edition : Friedrich Ernst Peters},
  journal   = {Digitale Edition : Friedrich Ernst Peters},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59637},
  year      = {2012},
  abstract  = {Humorvolle kleine Geschichte um einen naiven Bauern, der sich in der Stadt ein bisschen wichtig machen, „dick doon" will und den sein Plattdeutsch dazu verleitet, den Begriff „Subrektor" falsch zu verstehen.},
  language  = {de}
}
@article{Peters2012,
  author    = {Peters, Friedrich Ernst},
  title     = {Redensarten schlagen die Augen auf},
  series = {Digitale Edition: Friedrich Ernst Peters},
  journal   = {Digitale Edition: Friedrich Ernst Peters},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59626},
  year      = {2012},
  abstract  = {In diesem durch Erlebnisse aus der Zeit seiner Kriegsgefangenschaft in Frankreich (1914-1920) inspirierten Text erl{\"a}utert Peters die urspr{\"u}ngliche Bedeutung der plattdeutschen Redensart „to Stock doon" und der hochdeutschen Redensart „etwas auf dem Kerbholz haben".},
  language  = {de}
}
@article{Peters2012,
  author    = {Peters, Friedrich Ernst},
  title     = {"O du fr{\"o}hliche ..."},
  series = {Digitale Edition: Friedrich Ernst Peters},
  journal   = {Digitale Edition: Friedrich Ernst Peters},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59605},
  year      = {2012},
  abstract  = {Der Begriff „Kindjees" (Kind Jesus) bezeichnete lange Zeit in l{\"a}ndlichen Gegenden Norddeutschlands den Weihnachtsmann. Peters erinnert sich hier an die Weihnachtsbr{\"a}uche seiner Kindheit und schildert gleichzeitig die eigene Entwicklung von dem blind der Macht des Kindjees vertrauenden Knaben zu dem Friedrich Schiller verehrenden Vierzehnj{\"a}hrigen, der selbst f{\"u}r die Kleineren die Rolle des Kindjees {\"u}bernimmt. Die Sch{\"o}nheit der in der Schule gesungenen Kirchenlieder von Gerhard Tersteegen, die Faszination der Kinder f{\"u}r die Neuruppiner Bilderbogen (plattdeutsch: Lex) tragen viel zu der m{\"a}rchenhaften Stimmung bei, in der die Weihnachtsvorbereitungen in Luhnstedt, dem Heimatdorf des Dichters, stattfinden: „{\"U}berhaupt kam es vor Weihnachten sehr darauf an, alles, auch das Geringste, in der vertrauten Form wiederkehren zu lassen, Tradition zu schaffen. Die periodische, unbedingt gleichf{\"o}rmige Wiederkehr {\"a}ußerer Ereignisse ist eine Quelle der Poesie."},
  language  = {de}
}
@article{Peters2012,
  author    = {Peters, Friedrich Ernst},
  title     = {Goethe in Vicenza 1952},
  series = {Digitale Edition: Friedrich Ernst Peters},
  journal   = {Digitale Edition: Friedrich Ernst Peters},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59593},
  year      = {2012},
  abstract  = {Besichtigung des Teatro Olimpico in Vicenza mit einer F{\"u}hrung durch einen deutschlandbegeisterten Italiener, der, neuer Architekt des Goethe-Mythos, des Dichters Aufenthalt in Vicenza f{\"u}r die Reisenden neu erfindet.},
  language  = {de}
}
@unpublished{DyachenkoTarkhanov2012,
  author    = {Dyachenko, Evgueniya and Tarkhanov, Nikolai Nikolaevich},
  title     = {Degeneration of boundary layer at singular points},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60135},
  year      = {2012},
  abstract  = {We study the Dirichlet problem in a bounded plane domain for the heat equation with small parameter multiplying the derivative in t. The behaviour of solution at characteristic points of the boundary is of special interest. The behaviour is well understood if a characteristic line is tangent to the boundary with contact degree at least 2. We allow the boundary to not only have contact of degree less than 2 with a characteristic line but also a cuspidal singularity at a characteristic point. We construct an asymptotic solution of the problem near the characteristic point to describe how the boundary layer degenerates.},
  language  = {en}
}
@unpublished{Baer2012,
  author    = {B{\"a}r, Christian},
  title     = {Some properties of solutions to weakly hypoelliptic equations},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60064},
  year      = {2012},
  abstract  = {A linear differential operator L is called weakly hypoelliptic if any local solution u of Lu = 0 is smooth. We allow for systems, i.e. the coefficients may be matrices, not necessarily of square size. This is a huge class of important operators which covers all elliptic, overdetermined elliptic, subelliptic and parabolic equations. We extend several classical theorems from complex analysis to solutions of any weakly hypoelliptic equation: the Montel theorem providing convergent subsequences, the Vitali theorem ensuring convergence of a given sequence, and Riemann's first removable singularity theorem. In the case of constant coefficients we show that Liouville's theorem holds, any bounded solution must be constant and any L^p solution must vanish.},
  language  = {en}
}
@unpublished{Baer2012,
  author    = {B{\"a}r, Christian},
  title     = {Renormalized integrals and a path integral formula for the heat kernel on a manifold},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60052},
  year      = {2012},
  abstract  = {We introduce renormalized integrals which generalize conventional measure theoretic integrals. One approximates the integration domain by measure spaces and defines the integral as the limit of integrals over the approximating spaces. This concept is implicitly present in many mathematical contexts such as Cauchy's principal value, the determinant of operators on a Hilbert space and the Fourier transform of an L^p function. We use renormalized integrals to define a path integral on manifolds by approximation via geodesic polygons. The main part of the paper is dedicated to the proof of a path integral formula for the heat kernel of any self-adjoint generalized Laplace operator acting on sections of a vector bundle over a compact Riemannian manifold.},
  language  = {en}
}
@unpublished{PfaeffleStephan2012,
  author    = {Pf{\"a}ffle, Frank and Stephan, Christoph A.},
  title     = {Chiral asymmetry and the spectral action},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60046},
  year      = {2012},
  abstract  = {We consider orthogonal connections with arbitrary torsion on compact Riemannian manifolds. For the induced Dirac operators, twisted Dirac operators and Dirac operators of Chamseddine-Connes type we compute the spectral action. In addition to the Einstein-Hilbert action and the bosonic part of the Standard Model Lagrangian we find the Holst term from Loop Quantum Gravity, a coupling of the Holst term to the scalar curvature and a prediction for the value of the Barbero-Immirzi parameter.},
  language  = {en}
}
@unpublished{PfaeffleStephan2012,
  author    = {Pf{\"a}ffle, Frank and Stephan, Christoph A.},
  title     = {The Holst action by the spectral action principle},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60032},
  year      = {2012},
  abstract  = {We investigate the Holst action for closed Riemannian 4-manifolds with orthogonal connections. For connections whose torsion has zero Cartan type component we show that the Holst action can be recovered from the heat asymptotics for the natural Dirac operator acting on left-handed spinor fields.},
  language  = {en}
}
@unpublished{BaerBallmann2012,
  author    = {B{\"a}r, Christian and Ballmann, Werner},
  title     = {Boundary value problems for elliptic differential operators of first order},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60023},
  year      = {2012},
  abstract  = {We study boundary value problems for linear elliptic differential operators of order one. The underlying manifold may be noncompact, but the boundary is assumed to be compact. We require a symmetry property of the principal symbol of the operator along the boundary. This is satisfied by Dirac type operators, for instance. We provide a selfcontained introduction to (nonlocal) elliptic boundary conditions, boundary regularity of solutions, and index theory. In particular, we simplify and generalize the traditional theory of elliptic boundary value problems for Dirac type operators. We also prove a related decomposition theorem, a general version of Gromov and Lawson's relative index theorem and a generalization of the cobordism theorem.},
  language  = {en}
}
@unpublished{BaerPfaeffle2012,
  author    = {B{\"a}r, Christian and Pf{\"a}ffle, Frank},
  title     = {Wiener measures on Riemannian manifolds and the Feynman-Kac formula},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59998},
  year      = {2012},
  abstract  = {This is an introduction to Wiener measure and the Feynman-Kac formula on general Riemannian manifolds for Riemannian geometers with little or no background in stochastics. We explain the construction of Wiener measure based on the heat kernel in full detail and we prove the Feynman-Kac formula for Schr{\"o}dinger operators with bounded potentials. We also consider normal Riemannian coverings and show that projecting and lifting of paths are inverse operations which respect the Wiener measure.},
  language  = {en}
}
@unpublished{PfaeffleStephan2012,
  author    = {Pf{\"a}ffle, Frank and Stephan, Christoph A.},
  title     = {On gravity, torsion and the spectral action principle},
  issn      = {2193-6943},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59989},
  year      = {2012},
  abstract  = {We consider compact Riemannian spin manifolds without boundary equipped with orthogonal connections. We investigate the induced Dirac operators and the associated commutative spectral triples. In case of dimension four and totally anti-symmetric torsion we compute the Chamseddine-Connes spectral action, deduce the equations of motions and discuss critical points.},
  language  = {en}
}
@unpublished{BaerGinoux2012,
  author    = {B{\"a}r, Christian and Ginoux, Nicolas},
  title     = {Classical and quantum fields on Lorentzian manifolds},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59973},
  year      = {2012},
  abstract  = {We construct bosonic and fermionic locally covariant quantum fields theories on curved backgrounds for large classes of fields. We investigate the quantum field and n-point functions induced by suitable states.},
  language  = {en}
}
@phdthesis{Kluge2012,
  author    = {Kluge, Mario},
  title     = {Der Einsatz von Augmented Reality in der Fußg{\"a}ngernavigation : Konzeption und prototypische Implementierung eines smartphonebasierten Fußg{\"a}ngernavigationssystems},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60246},
  school      = {Universit{\"a}t Potsdam},
  year      = {2012},
  abstract  = {Fußverkehr findet im gesamten {\"o}ffentlichen Raum statt und erm{\"o}glicht die l{\"u}ckenlose Verbindung von T{\"u}r zu T{\"u}r. Jeder Mensch steht vor Beginn einer Fortbewegung vor den Fragen „Wo bin ich?", „Wo liegt mein Ziel?" und „Wie komme ich dahin?". Ein Großteil der auf dem Markt befindlichen Navigationssysteme f{\"u}r Fußg{\"a}nger stellen reduzierte Varianten aus Fahrzeugen dar und basieren auf 2D- Kartendarstellungen oder bilden die Realit{\"a}t als dreidimensionales Modell ab. Navigationsprobleme entstehen dann, wenn es dem Nutzer nicht gelingt, die Information aus der Anweisung auf die Wirklichkeit zu beziehen und umzusetzen. Ein m{\"o}glicher Grund daf{\"u}r liegt in der Visualisierung der Navigationsanweisung. Die r{\"a}umliche Wahrnehmung des Menschen erfolgt ausgehend von einem bestimmten Betrachtungsstandpunkt und bringt die Lage von Objekten und deren Beziehung zueinander zum Ausdruck. Der Einsatz von Augmented Reality (erweiterte Realit{\"a}t) entspricht dem Erscheinungsbild der menschlichen Wahrnehmung und ist f{\"u}r Menschen eine nat{\"u}rliche und zugleich vertraute Ansichtsform. Im Unterschied zu kartographischer Visualisierung wird die Umwelt mittels Augmented Reality nicht modelliert, sondern realit{\"a}tsgetreu abgebildet und erg{\"a}nzt. Das Ziel dieser Arbeit ist ein Navigationsverfahren, das der nat{\"u}rlichen Fort-bewegung und Sichtweise von Fußg{\"a}ngern gerecht wird. Das Konzept basiert auf dem Einsatz einer Kombination aus Realit{\"a}t und virtueller Realit{\"a}t zu einer erweiterten Ansicht. Da keine Darstellungsform als die Route selbst besser geeignet ist, um einen Routenverlauf zu beschreiben, wird die Realit{\"a}t durch eine virtuelle Route erweitert. Die perspektivische Anpassung der Routendarstellung erfordert die sensorische Erfassung der Position und Lage des Betrachtungsstandpunktes. Das der Navigation zu Grunde liegende Datenmodell bleibt dem Betrachter dabei verborgen und ist nur in Form der erweiterten Realit{\"a}t sichtbar. Der im Rahmen dieser Arbeit entwickelte Prototyp tr{\"a}gt die Bezeichnung RealityView. Die Basis bildet ein freies und quelloffenes Navigationssystem, das f{\"u}r die Fußg{\"a}ngernavigation modular erweitert wurde. Das Ergebnis ist ein smartphonebasierter Navigationsprototyp, in dem die Ansichtsform einer zweidimensionalen Bildschirmkarte im Grundriss und die Darstellung einer erweiterten Realit{\"a}t im Aufriss kombiniert werden. Die Evaluation des Prototyps best{\"a}tigt die Hypothese, dass der Einsatz von Augmented Reality f{\"u}r die Navigation von Fußg{\"a}ngern m{\"o}glich ist und von der Nutzergruppe akzeptiert wird. Dar{\"u}ber hinaus bescheinigen Wissenschaftler im Rahmen von Experten-interviews den konzeptionellen Ansatz und die prototypische Umsetzung des RealityView. Die Auswertung einer Eye-Tracking-Pilotstudie erbrachte den Nachweis, dass Fußg{\"a}nger die Navigationsanweisung auf markante Objekte der Umwelt beziehen, deren Auswahl durch den Einsatz von Augmented Reality beg{\"u}nstigt wird.},
  language  = {de}
}
@phdthesis{Piluso2012,
  author    = {Piluso, Susanna},
  title     = {Design of biopolymer-based networks with defined molecular architecture},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59865},
  school      = {Universit{\"a}t Potsdam},
  year      = {2012},
  abstract  = {In this work, the synthesis of biopolymer-based hydrogel networks with defined architecture is presented. In order to obtain materials with defined properties, the chemoselective copper-catalyzed azide-alkyne cycloaddition (or Click Chemistry) was used for the synthesis of gelatin-based hydrogels. Alkyne-functionalized gelatin was reacted with four different diazide crosslinkers above its sol-gel transition to suppress the formation of triple helices. By variation of the crosslinking density and the crosslinker flexibility, the swelling (Q: 150-470 vol.-\%;) and the Young's and shear moduli (E: 50 kPa - 635 kPa, G': 0.1 kPa - 16 kPa) could be tuned in the kPa range. In order to understand the network structure, a method based on the labelling of free functional groups within the hydrogel was developed. Gelatin-based hydrogels were incubated with alkyne-functionalized fluorescein to detect the free azide groups, resulting from the formation of dangling chains. Gelatin hydrogels were also incubated with azido-functionalized fluorescein to check the presence of alkyne groups available for the attachment of bioactive molecules. By using confocal laser scanning microscopy and fluorescence spectroscopy, the amount of crosslinking, grafting and free alkyne groups could be determined. Dangling chains were observed in samples prepared by using an excess of crosslinker and also when using equimolar amounts of alkyne:azide. In the latter case the amount of dangling chains was affected by the crosslinker structure. Specifically, 0.1\% of dangling chains were found using 4,4'-diazido-2,2'-stilbene-disulfonic acid as cosslinker, 0.06\% with 1,8-diazidooctane, 0.05\% with 1,12-diazidododecane and 0.022 \% with PEG-diazide. This observation could be explained considering the structure of the crosslinkers. During network formation, the movements of the gelatin chains are restricted due to the formation of covalent netpoints. A further crosslinking will be possible only in the case of crosslinker that are flexible and long enough to reach another chain. The method used to obtain defined gelatin-based hydrogels enabled also the synthesis of hyaluronic acid-based hydrogels with tailorable properties. Alkyne-functionalized hyaluronic acid was crosslinked with three different linkers having two terminal azide functionalities. By variation of the crosslinking density and crosslinker type, hydrogels with elastic moduli in the range of 0.5-3 kPa have been prepared. The variation of the crosslinking density and crosslinker type had furthermore an influence also on the hydrolytic and enzymatic degradation of gelatin-based hydrogels. Hydrogels with a low crosslinker amount experienced a faster decrease in mass loss and elastic modulus compared to hydrogels with higher crosslinker content. Moreover, the structure of the crosslinker had a strong influence on the enzymatic degradation. Hydrogels containing a crosslinker with a rigid structure were much more resistant to enzymatic degradation than hydrogels containing a flexible crosslinker. During hydrolytic degradation, the hydrogel became softer while maintaining the same outer dimensions. These observations are in agreement with a bulk degradation mechanism, while the decrease in size of the hydrogels during enzymatic degradation suggested a surface erosion mechanism. Because of the use of small amount of crosslinker (0.002 mol.\% 0.02 mol.\%) the networks synthesized can still be defined as biopolymer-based hydrogels. However, they contain a small percentage of synthetic residues. Alternatively, a possible method to obtain biopolymer-based telechelics, which could be used as crosslinkers, was investigated. Gelatin-based fragments with defined molecular weight were obtained by controlled degradation of gelatin with hydroxylamine, due to its specific action on asparaginyl-glycine bonds. The reaction of gelatin with hydroxylamine resulted in fragments with molecular weights of 15, 25, 37, and 50 kDa (determined by SDS-PAGE) independently of the reaction time and conditions. Each of these fragments could be potentially used for the synthesis of hydrogels in which all components are biopolymer-based materials.},
  language  = {en}
}
@misc{OPUS4-5782,
  title     = {Ern{\"a}hrung garantiert?},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59905},
  year      = {2012},
  abstract  = {Alle Menschen haben elementare Gemeinsamkeiten: Um zu {\"u}berleben, m{\"u}ssen sie atmen, trinken - und essen. Doch ist Ern{\"a}hrung garantiert? Der Diskurs {\"u}ber globale Ern{\"a}hrungssicherung f{\"u}hrte Jahrzehnte lang ein Schattendasein. Nun erf{\"a}hrt die Agrarwirtschaft eine Renaissance, doch ob dies den Hungernden zugutekommen wird, ist fraglich: Immer mehr Produkte sollen nicht den Energiebedarf der Menschen, sondern den der Maschinen decken. In unserem aktuellen Thema diskutieren Experten die M{\"o}glichkeiten und Risiken dieser ver{\"a}nderten Wertsch{\"a}tzung der Landwirtschaft.},
  language  = {de}
}
@misc{Maihold2012,
  author    = {Maihold, G{\"u}nther},
  title     = {Wahlen im Schatten des organisierten Verbrechens : Mexiko zwischen State Capture und Staatsversagen},
  issn      = {0944-8101},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59896},
  year      = {2012},
  abstract  = {Kurz vor der Wahl am 1. Juli steht Mexiko vor großen Turbulenzen: Parteien beschuldigen sich gegenseitig, Mitglieder oder -l{\"a}ufer der organisierten Kriminalit{\"a}t zu sein. Der Krieg gegen die Drogen, der zuvor noch nationale Einheit heraufbeschwor, wird jetzt zum Instrument der Verleumdung des politischen Gegners. Wie kann angesichts br{\"u}chiger Staatlichkeit eine sichere Wahl gew{\"a}hrleistet werden?},
  language  = {de}
}
@misc{Franzke2012,
  author    = {Franzke, Jochen},
  title     = {Europa ohne Kompass},
  issn      = {0944-8101},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-59881},
  year      = {2012},
  abstract  = {Die noch nicht ausgestandene Staatsschuldenkrise seit Ende 2009 hat Europa st{\"a}rker ver{\"a}ndert, als viele wahrhaben wollen. Es stellt sich die grunds{\"a}tzliche Frage des Sinns der europ{\"a}ischen Integration. Vor allem die Glaubw{\"u}rdigkeit des europ{\"a}ischen politischen F{\"u}hrungspersonals hat gelitten. Ohne Kompass wurstelt man sich seit mehr als zwei Jahren durch. Keine "rote Linie", die nicht nach wenigen Wochen {\"u}berschritten wurde, kein Masterplan, der nicht bald Makulatur geworden ist.},
  language  = {de}
}