@article{28146, author = {{Matzner, Tobias}}, issn = {{0951-5666}}, journal = {{AI & SOCIETY}}, number = {{1}}, pages = {{95--102}}, title = {{{The model gap: cognitive systems in security applications and their ethical implications}}}, doi = {{https://doi.org/10.1007/s00146-013-0525-4}}, volume = {{31}}, year = {{2013}}, } @article{43257, abstract = {{We demonstrate that trapping of dispersive waves between two optical solitons takes place when resonant scattering of the waves on the solitons leads to nearly perfect reflections. The momentum transfer from the radiation to solitons results in their mutual attraction and a subsequent collision. The spectrum of the trapped radiation can either expand or shrink in the course of the propagation, which is controlled by arranging either collision or separation of the solitons.}}, author = {{Yulin, A. V. and Driben, R. and Malomed, B.A. and Skryabin, D.V.}}, journal = {{Optics Express}}, number = {{12}}, title = {{{Soliton interaction mediated by cascaded four wave mixing with dispersive waves}}}, doi = {{10.1364/OE.21.014481}}, volume = {{21}}, year = {{2013}}, } @phdthesis{64748, author = {{Alzaareer, Hamza}}, title = {{{Lie groups of mappings on non-compact spaces and manifolds}}}, year = {{2013}}, } @phdthesis{64750, author = {{Schmeding, Alexander}}, title = {{{The diffeomorphism group of a non-compact orbifold}}}, year = {{2013}}, } @article{58526, author = {{Masri, Leila and Schulte, Rebecca D. and Timmermeyer, Nadine and Thanisch, Stefanie and Crummenerl, Lena Luise and Jansen, Gunther and Michiels, Nico K. and Schulenburg, Hinrich}}, journal = {{Ecology Letters}}, keywords = {{Bacillus thuringiensis, Bateman’s principle, Caenorhabditis elegans, ecological immunology, host–parasite coevolu- tion, Red Queen hypothesis, sexual selection}}, number = {{16}}, pages = {{461--468}}, title = {{{Sex differences in host defence interfere with parasite- mediated selection for outcrossing during host–parasite coevolution}}}, doi = {{10.1111/ele.12068}}, year = {{2013}}, } @article{13525, abstract = {{The frequency-dependent dielectric function and the second-order polarizability tensor of ferroelectric LiNbO3 are calculated from first principles. The calculations are based on the electronic structure obtained from density-functional theory. The subsequent application of the GW approximation to account for quasiparticle effects and the solution of the Bethe-Salpeter equation for the stoichiometric material yield a dielectric function that slightly overestimates the absorption onset and the oscillator strength in comparison with experimental measurements. Calculations at the level of the independent-particle approximation indicate that these deficiencies are, at least, partially related to the neglect of intrinsic defects typical for the congruent material. The second-order polarizability calculated within the independent-particle approximation predicts strong nonlinear coefficients for photon energies above 1.5 eV. The comparison with measured data suggests that the inclusion of self-energy effects in the nonlinear optical response leads to a better agreement with experiments. The intrinsic defects of congruent samples reduce the optical nonlinearities, in particular, for the 21 and 31 tensor components, further improving the agreement between experiments and theory.}}, author = {{Riefer, Arthur and Sanna, Simone and Schindlmayr, Arno and Schmidt, Wolf Gero}}, issn = {{1550-235X}}, journal = {{Physical Review B}}, number = {{19}}, publisher = {{American Physical Society}}, title = {{{Optical response of stoichiometric and congruent lithium niobate from first-principles calculations}}}, doi = {{10.1103/PhysRevB.87.195208}}, volume = {{87}}, year = {{2013}}, } @article{18476, abstract = {{We investigate the band dispersion and relevant electronic properties of rubrene single crystals within the GW approximation. Due to the self-energy correction, the dispersion of the highest occupied molecular orbital (HOMO) band increases by 0.10 eV compared to the dispersion of the Kohn-Sham eigenvalues within the generalized gradient approximation, and the effective hole mass consequently decreases. The resulting value of 0.90 times the electron rest mass along the Γ-Y direction in the Brillouin zone is closer to experimental measurements than that obtained from density-functional theory. The enhanced bandwidth is explained in terms of the intermolecular hybridization of the HOMO(Y) wave function along the stacking direction of the molecules. Overall, our results support the bandlike interpretation of charge-carrier transport in rubrene.}}, author = {{Yanagisawa, Susumu and Morikawa, Yoshitada and Schindlmayr, Arno}}, issn = {{1550-235X}}, journal = {{Physical Review B}}, number = {{11}}, publisher = {{American Physical Society}}, title = {{{HOMO band dispersion of crystalline rubrene: Effects of self-energy corrections within the GW approximation}}}, doi = {{10.1103/PhysRevB.88.115438}}, volume = {{88}}, year = {{2013}}, } @article{18479, abstract = {{The GW approximation for the electronic self-energy is an important tool for the quantitative prediction of excited states in solids, but its mathematical exploration is hampered by the fact that it must, in general, be evaluated numerically even for very simple systems. In this paper I describe a nontrivial model consisting of two electrons on the surface of a sphere, interacting with the normal long-range Coulomb potential, and show that the GW self-energy, in the absence of self-consistency, can in fact be derived completely analytically in this case. The resulting expression is subsequently used to analyze the convergence of the energy gap between the highest occupied and the lowest unoccupied quasiparticle orbital with respect to the total number of states included in the spectral summations. The asymptotic formula for the truncation error obtained in this way, whose dominant contribution is proportional to the cutoff energy to the power −3/2, may be adapted to extrapolate energy gaps in other systems.}}, author = {{Schindlmayr, Arno}}, issn = {{1550-235X}}, journal = {{Physical Review B}}, number = {{7}}, publisher = {{American Physical Society}}, title = {{{Analytic evaluation of the electronic self-energy in the GW approximation for two electrons on a sphere}}}, doi = {{10.1103/PhysRevB.87.075104}}, volume = {{87}}, year = {{2013}}, } @article{30766, abstract = {{Modelle Allgemeiner Didaktik sind in der Regel weder empirisch fundiert noch ist ihr Verhältnis zum realen Planungshandeln von Lehrerinnen und Lehrern geklärt. Theoretische Basis für empirische Studien zur Unterrichtsplanung sind selten allgemeindidaktische Modelle, sondern eher psychologische Theorien. Auch die Forschungzu Aufgaben ist bislang eher kognitionspsychologisch orientiert. Vor diesem Hintergrund knüpft der vorliegende Beitrag an die allgemeindidaktische Aufgabenforschung an. Allerdings erwies sich der Begriff der Aufgabe im Laufe des Forschungsprozesses als zu eng bzw. voraussetzungsvoll und wurde daher zugunsten des Konzepts der Schüleraktivitäten erweitert. Die zentrale Frage der explorativen Studie lautet demnach, wie Lehrerinnen und Lehrer Schüleraktivitäten planen. Die Überlegungen wurden dabei mit der Methode des Lauten Denkens erfasst und qualitativ inhaltsanalytisch ausgewertet. Erste Ergebnisse zeigen, dass Lehrerinnen und Lehrer zwar implizit in ihrer Planung einige der Dimensionen berücksichtigen, die mit allgemeindidaktischen Modellen in Einklang stehen, dass aber noch ungenügend erforscht wurde, wie Schüleraktivitäten in den subjektiven Planungsüberlegungen vorkommen.}}, author = {{Koch, Barbara and Koch-Priewe, Barbara and Köker, Anne and Kullmann, Harry and Pineker, Anna and Störtländer, Jan Christoph}}, isbn = {{978-3-3840-1172-5}}, journal = {{Jahrbuch für Allgemeine Didaktik}}, keywords = {{Unterrichtsplanung, Schüleraktivitäten, kritisch-konstruktive Didaktik}}, pages = {{267–277}}, title = {{{Schüleraktivitäten in den Planungsüberlegungen von Lehrerinnen und Lehrern: Eine explorative Studie zur Didaktik im Kontext der kritisch-konstruktiven Didaktik}}}, volume = {{3}}, year = {{2013}}, } @inbook{30990, abstract = {{Die Kooperation von Lehrkräften wird als ein zentrales Merkmal „guter Schulen“ eingestuft. Gleichwohl sind die zugehörigen Befunde mitunter wi- dersprüchlich. Vor dem Hintergrund eines theoretischen Wirkungsmodells referiert der vorliegende Beitrag sowohl bestätigende als auch relativierende Ergebnisse im Hinblick auf die Bedeutung der Lehrerkooperation für die Schulleistung, welche ihrerseits zunächst als Indikator des Erfolgs kumulati- ver Bildungsprozesse theoretisch gefasst wird. Bestätigende Befunde lassen sich etwa im Hinblick auf einen Konsens zwi- schen Lehrkräften bei der Umsetzung des Curriculums, den Lerngelegenhei- ten für Lehrkräfte oder den fachdidaktischen Impulsen innerhalb von Kolle- gien ausmachen. Relativierende Hinweise liefern beispielsweise – vor dem Hintergrund einer elaborierten Kooperationskultur – die häufig erwartungs- widrig schlechten Schulleistungen an Gesamtschulen sowie die fehlenden Effekte der Kooperationspraktiken auf das kumulative Kompetenzniveau in Deutsch und Englisch gemäß der DESI-Studie. Die aufgezeigten Perspektiven für die Forschung beziehen sich u.a. auf eine präzisere Erfassung solcher Faktoren des Unterrichts, die einerseits durch Lehrerkooperation verbessert werden können und andererseits in großer Proximität zum Schülerlernen stehen, zum Beispiel die kognitive Aktivierung.}}, author = {{Kullmann, Harry}}, booktitle = {{Professionalität und Kooperation in Schulen. Beiträge zur Diskussion über Schulqualität}}, editor = {{Keller-Schneider, Manuela and Albisser, Stefan and Wissinger, Jochen}}, isbn = {{978-3-7815-1891-9}}, pages = {{123–137}}, publisher = {{Klinkhardt}}, title = {{{Der Zusammenhang von Lehrerkooperation und Schulleistung – Zentrale Befunde und Perspektiven für die Forschung}}}, year = {{2013}}, } @inproceedings{1127, abstract = {{The conceptual condensability of technical terms permits us to use them as effective queries to search scientific databases. However, authors often employ alternative expressions to represent the meanings of specific terms, in other words, Terminological Paraphrases (TPs) in the literature for certain reasons. In this paper, we propose an effective way to retrieve “de facto relevance documents” which only contain those TPs and cannot be searched by conventional models in an environment with only controlled vocabularies by adapting Predicate Argument Tuple (PAT). The experiment confirms that PAT-based document retrieval is an effective and promising method to search those kinds of documents and to improve terminology-based scientific information access models.}}, author = {{Choi, Sung-Pil and Song, Sa-kwang and Jung, Hanmin and Geierhos, Michaela and Myaeng, Sung Hyon}}, booktitle = {{Information Science and Industrial Applications: Proceedings, International Conference, ISI 2012, Cebu, Philippines, May 2012}}, editor = {{Chang, Chin-Chen and Gelogo, Yvette E. and Caytiles, Ronnie E.}}, issn = {{22871233}}, location = {{Cebu, Philippines}}, pages = {{371--378}}, publisher = {{SERSC}}, title = {{{Scientific Literature Retrieval based on Terminological Paraphrases using Predicate Argument Tuple}}}, volume = {{4}}, year = {{2012}}, } @inproceedings{1128, abstract = {{Our purpose is to perform data record extraction from onlineevent calendars exploiting sublanguage and domain characteristics. We therefore use so-called domain-dependent data (D³) completely based on language-specific key expressions and HTML patterns to recognize every single event given on the investigated web page. One of the most remarkable advantages of our method is that it does not require any additional classification steps based on machine learning algorithms or keyword extraction methods; it is a so-called one-step mining technique. Moreover, another important criteria is that our system is robust to DOM and layout modifications made by web designers. Thus, preliminary experimental results are provided to demonstrate proof-of-concept of such an approach tested on websites in the German opera domain. Furthermore, we could show that our proposed technique outperforms other data record mining applications run on event sites.}}, author = {{Lee, Yeong Su and Geierhos, Michaela and Song, Sa-Kwang and Jung, Hanmin}}, booktitle = {{Software Technology: Prooceedings, International Conference, SoftTech 2012, Cebu, Philippines, May 2012}}, editor = {{Chang, Chin-Chen and Gelogo, Yvette E. and Caytiles, Ronnie E.}}, issn = {{22871233}}, location = {{Cebu, Philippines}}, pages = {{134--139}}, publisher = {{SERSC}}, title = {{{A Proof-of-Concept of D³ Record Mining using Domain-Dependent Data}}}, volume = {{5}}, year = {{2012}}, } @techreport{2249, abstract = {{The phenomenon that groups or people work together when they face an opponent, although they have little in common otherwise, has been termed the "common enemy effect". We study a model of network formation, where players can use links to build a network, knowing that they are facing a common enemy who can disrupt the links within the network, and whose goal it is to minimize the sum of the benefits of the network. We find that introducing a common enemy can lead to the formation of stable and efficient networks as well as fragmented networks and the empty network.}}, author = {{Hoyer, Britta and De Jaegher, Kris}}, title = {{{Network Disruption and the Common Enemy Effect}}}, volume = {{12-06}}, year = {{2012}}, } @inproceedings{5680, author = {{Püschel, Tim and Schryen, Guido and Hristova, Diana and Neumann, Dirk}}, booktitle = {{European Conference on Information Systems}}, title = {{{Cloud Service Revenue Management}}}, year = {{2012}}, } @article{5688, author = {{Bodenstein, Christian and Schryen, Guido and Neumann, Dirk}}, journal = {{European Journal of Operational Research : EJOR}}, number = {{1}}, pages = {{157--167}}, publisher = {{Elsevier}}, title = {{{Energy-Aware Workload Management Models for Operating Cost Reduction in Data Centers}}}, volume = {{222}}, year = {{2012}}, } @phdthesis{586, abstract = {{FPGAs, systems on chip and embedded systems are nowadays irreplaceable. They combine the computational power of application specific hardware with software-like flexibility. At runtime, they can adjust their functionality by downloading new hardware modules and integrating their functionality. Due to their growing capabilities, the demands made to reconfigurable hardware grow. Their deployment in increasingly security critical scenarios requires new ways of enforcing security since a failure in security has severe consequences. Aside from financial losses, a loss of human life and risks to national security are possible. With this work I present the novel and groundbreaking concept of proof-carrying hardware. It is a method for the verification of properties of hardware modules to guarantee security for a target platform at runtime. The producer of a hardware module delivers based on the consumer's safety policy a safety proof in combination with the reconfiguration bitstream. The extensive computation of a proof is a contrast to the comparatively undemanding checking of the proof. I present a prototype based on open-source tools and an abstract FPGA architecture and bitstream format. The proof of the usability of proof-carrying hardware provides the evaluation of the prototype with the exemplary application of securing combinational and bounded sequential equivalence of reference monitor modules for memory safety.}}, author = {{Drzevitzky, Stephanie}}, pages = {{114}}, publisher = {{Universität Paderborn}}, title = {{{Proof-Carrying Hardware: A Novel Approach to Reconfigurable Hardware Security}}}, year = {{2012}}, } @article{43, author = {{Chen, Xianzhong and Huang, Lingling and Mühlenbernd, Holger and Li, Guixin and Bai, Benfeng and Tan, Qiaofeng and Jin, Guofan and Qiu, Cheng-Wei and Zhang, Shuang and Zentgraf, Thomas}}, issn = {{2041-1723}}, journal = {{Nature Communications}}, publisher = {{Springer Nature}}, title = {{{Dual-polarity plasmonic metalens for visible light}}}, doi = {{10.1038/ncomms2207}}, volume = {{3}}, year = {{2012}}, } @article{5578, author = {{Wex, Felix and Schryen, Guido and Neumann, Dirk}}, journal = {{International Journal of Information Systems for Crisis Response and Management}}, number = {{3}}, pages = {{23--41}}, publisher = {{IGI Publ.}}, title = {{{A Fuzzy Decision Support Model for Natural Disaster Response under Informational Uncertainty}}}, volume = {{4}}, year = {{2012}}, } @inproceedings{5579, author = {{Wex, Felix and Schryen, Guido and Neumann, Dirk}}, booktitle = {{International Conference on Information Systems for Crisis Response and Management (ISCRAM) 2012}}, title = {{{Operational Emergency Response under Informational Uncertainty: A Fuzzy Optimization Model for Scheduling and Allocating Rescue Units}}}, year = {{2012}}, } @inproceedings{5615, author = {{Schryen, Guido and Wex, Felix}}, booktitle = {{45th Hawaii International Conference on System Sciences}}, title = {{{IS Design Thinking in Disaster Management Research}}}, year = {{2012}}, }