@article{64669, author = {{Glöckner, Helge}}, issn = {{2156-2261}}, journal = {{Kyoto Journal of Mathematics}}, keywords = {{22E45, 22D12, 46A13, 46E25, 46F05}}, number = {{3}}, pages = {{567–595}}, title = {{{Continuity of LF-algebra representations associated to representations of Lie groups}}}, doi = {{10.1215/21562261-2265895}}, volume = {{53}}, year = {{2013}}, } @article{64670, author = {{Glöckner, Helge}}, issn = {{0723-0869}}, journal = {{Expositiones Mathematicae}}, keywords = {{37D10, 46S10, 26E30, 22E20, 37P20}}, number = {{2}}, pages = {{116–150}}, title = {{{Invariant manifolds for analytic dynamical systems over ultrametric fields}}}, doi = {{10.1016/j.exmath.2013.01.009}}, volume = {{31}}, year = {{2013}}, } @article{64668, author = {{Glöckner, Helge}}, issn = {{2070-0466}}, journal = {{p-Adic Numbers, Ultrametric Analysis and Applications}}, keywords = {{26E30, 12J25}}, number = {{2}}, pages = {{122–159}}, title = {{{Exponential laws for ultrametric partially differentiable functions and applications}}}, doi = {{10.1134/S2070046613020039}}, volume = {{5}}, 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}}, } @inproceedings{63085, author = {{Sumfleth, Elke and Harbach, Andrea and Fechner, Sabine}}, booktitle = {{Annual Meeting of the National Association for Research in Science Teaching [NARST], 6-9 April, Rio Grande, Puerto Rico, USA}}, title = {{{Investigating the effects of problem-orientation and interconnectedness in context-based learning tasks}}}, year = {{2013}}, } @inbook{18475, 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 yield a dielectric function for the stoichiometric material 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 self-energy effects improve the agreement between experiment and theory. The intrinsic defects of congruent samples reduce the optical nonlinearities, in particular for the 21 and 31 tensor components, further improving the agreement with measured data.}}, author = {{Riefer, Arthur and Rohrmüller, Martin and Landmann, Marc and Sanna, Simone and Rauls, Eva and Vollmers, Nora Jenny and Hölscher, Rebecca and Witte, Matthias and Li, Yanlu and Gerstmann, Uwe and Schindlmayr, Arno and Schmidt, Wolf Gero}}, booktitle = {{High Performance Computing in Science and Engineering ‘13}}, editor = {{Nagel, Wolfgang E. and Kröner, Dietmar H. and Resch, Michael M.}}, isbn = {{978-3-319-02164-5}}, pages = {{93--104}}, publisher = {{Springer}}, title = {{{Lithium niobate dielectric function and second-order polarizability tensor from massively parallel ab initio calculations}}}, doi = {{10.1007/978-3-319-02165-2_8}}, 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}}, } @inbook{58810, author = {{Milkov, Nikolay}}, booktitle = {{The Berlin Group and the Philosophy of Logical Empiricism}}, editor = {{Milkov, Nikolay and Peckhaus, Volker}}, isbn = {{978-94-007-5484-3}}, location = {{Paderborn}}, pages = {{3--32}}, publisher = {{Springer}}, title = {{{The Berlin Group and the Vienna Circle: Affinities and Divergences}}}, doi = {{10.1007/978-94-007-5485-0_1}}, volume = {{273}}, year = {{2013}}, } @article{64930, author = {{Mersch, Katharina Ulrike}}, journal = {{Frühmittelalterliche Studien}}, pages = {{209--238}}, title = {{{Göttlich legitimierter Eigensinn. Gewissensfreiheit als Option im Umgang mit dem exkommunizierten Ludwig dem Bayern und dem Interdikt}}}, volume = {{47}}, year = {{2013}}, } @inbook{65335, author = {{Droß-Krüpe, Kerstin}}, booktitle = {{Making Textiles in Pre-roman and Roman Times. People, Places, Identities}}, editor = {{Gleba, M. and Pásztókai- Szeöke, J.}}, pages = {{149--160}}, title = {{{Textiles and their Merchants in Roman Eastern Trade}}}, volume = {{13}}, year = {{2013}}, } @inbook{65336, author = {{Droß-Krüpe, Kerstin}}, booktitle = {{Die Macht der Toga. DressCode im Römischen Weltreich}}, editor = {{Wieczorek, A. and al., et}}, pages = {{164--167}}, title = {{{Berufliche Identität - Zur Ausbildung von Webern im römischen Ägypten}}}, year = {{2013}}, } @article{65333, author = {{Droß-Krüpe, Kerstin and Wagner, Yvonne}}, journal = {{Archaeological Textiles Review}}, pages = {{39--46}}, title = {{{Ancient Wardrobe Studies. The Wardrobe of Kroniania from Tebtynis}}}, volume = {{55}}, year = {{2013}}, } @article{65334, author = {{Droß-Krüpe, Kerstin}}, journal = {{Mitteilungen der Anthropologischen Gesellschaft in Wien}}, pages = {{25--35}}, title = {{{Medici cohortis - medici legionis. Zur medizinischen Versorgung der römischen Armee}}}, year = {{2013}}, } @article{65332, author = {{Droß-Krüpe, Kerstin and Wagner, Yvonne}}, journal = {{MBAH}}, pages = {{153--173}}, title = {{{Kleidung als Mitgift im kaiserzeitlichen Ägypten. Eine Bestandsaufnahme}}}, volume = {{31}}, year = {{2013}}, } @article{5191, abstract = {{This study examines the relevance of financial and non-financial information for the valuation of venture capital (VC) investments. Based on a hand-collected data set on venture-backed start-ups in Germany, we investigate the internal due diligence documents of over 200 investment rounds. We document that balance sheet and income statement items capture as much economic content as verifiable non-financial information (e.g. team experience or the number of patents) while controlling for several deal characteristics (e.g. industry, investment round, or yearly VC fund inflows). In addition, we show that valuations based on accounting and non-accounting information yield a level of valuation accuracy that is comparable to that of publicly traded firms. Further analyses show that the industry-specific total asset multiples outperform the popular revenue multiples but lead to significantly less accurate results than those obtained from the more comprehensive valuation models. Overall, our findings might inform researchers and standard-setters of the usefulness of accounting information for investment companies and provide additional evidence to gauge the overall valuation accuracy in VC settings.}}, author = {{Sievers, Sönke and Mokwa, Christopher F and Keienburg, Georg}}, journal = {{European Accounting Review (VHB-JOURQUAL 4 Ranking A)}}, keywords = {{value relevance, equity valuation, venture capital, human capital, start-ups}}, number = {{3}}, pages = {{467--511}}, publisher = {{Taylor \& Francis}}, title = {{{The relevance of financial versus non-financial information for the valuation of venture capital-backed firms}}}, doi = {{10.1080/09638180.2012.741051}}, volume = {{22}}, year = {{2013}}, } @article{5192, abstract = {{For the valuation of fast growing innovative firms Schwartz and Moon (Financ Anal J 56:62–75, 2000), (Financ Rev 36:7–26, 2001) develop a fundamental valuation model where key parameters follow stochastic processes. While prior research shows promising potential for this model, it has never been tested on a large scale dataset. Thus, guided by economic theory, this paper is the first to design a large-scale applicable implementation on around 30,000 technology firm quarter observations from 1992 to 2009 for the US to assess this model. Evaluating the feasibility and performance of the Schwartz-Moon model reveals that it is comparably accurate to the traditional sales multiple with key advantages in valuing small and non-listed firms. Most importantly, however, the model is able to indicate severe market over- or undervaluation from a fundamental perspective. We demonstrate that a trading strategy based on our implementation has significant investment value. Consequently, the model seems suitable for detecting misvaluations as the dot-com bubble.}}, author = {{Klobucnik, Jan and Sievers, Sönke}}, journal = {{Journal of Business Economics (VHB-JOURQUAL 4 Ranking B)}}, keywords = {{Schwartz-Moon model, Market mispricing, Empirical test, Company valuation, Trading strategy}}, number = {{9}}, pages = {{947--984}}, publisher = {{Springer}}, title = {{{Valuing high technology growth firms}}}, doi = {{https://doi.org/10.1007/s11573-013-0684-2}}, volume = {{83}}, year = {{2013}}, } @article{5113, abstract = {{Standard equity valuation approaches (i.e., DDM, RIM, and DCF model) are derived under the assumption of ideal conditions, such as infinite payoffs and clean surplus accounting. Because these conditions are hardly ever met, we extend the standard approaches, based on the fundamental principle of financial statement articulation. The extended models are then tested empirically by employing two sets of forecasts: (1) analyst forecasts provided by Value Line and (2) forecasts generated by cross-sectional regression models. The main result is that our extended models yield considerably smaller valuation errors. Moreover, by construction, identical value estimates are obtained across the extended models. By reestablishing empirical equivalence under non-ideal conditions, our approach provides a benchmark that enables us to quantify the errors resulting from individual deviations from ideal conditions, and thus, to analyze the robustness of the standard approaches. Finally, by providing a level playing field for the different valuation approaches, our findings have implications for other empirical settings, for example, estimating the implied cost of capital. }}, author = {{Heinrichs, Nicolas and Hess, Dieter and Homburg, Carsten and Lorenz, Michael and Sievers, Sönke}}, journal = {{Contemporary Accounting Research (VHB-JOURQUAL 4 Ranking A+)}}, keywords = {{Dividend Discount Model, Residual Income, Discounted Cash Flow, Dirty Surplus, Terminal Value, Valuation Error}}, number = {{1}}, pages = {{42--79}}, publisher = {{Wiley Online Library}}, title = {{{Extended dividend, cash flow, and residual income valuation models: Accounting for deviations from ideal conditions}}}, doi = {{10.2139/ssrn.1145201}}, volume = {{30}}, year = {{2013}}, } @article{20863, abstract = {{This article examines and extends research on the relation between the capital asset pricing model market beta, accounting risk measures and macroeconomic risk factors. We employ a beta decomposition approach that nests competing models with different business risk proxies and allows to frame cross-model comparison. Because model tests require estimated independent variables resulting in measurement error, we empirically estimate three comparable model specifications with instrumental variable estimators and for the first time provide thorough instrument diagnostics in this setting. Correcting for the heretofore neglected weak instruments problem we find that growth risk (i.e., the risk of firm sales variations that are inconsistent with the market wide trends), is the business risk that explains cross-sectional variations in market beta best.}}, author = {{Schlueter, Tobias and Sievers, Sönke}}, issn = {{0924-865X}}, journal = {{Review of Quantitative Finance and Accounting (VHB-JOURQUAL 4 Ranking B)}}, keywords = {{CAPM, Cost of capital, Accounting beta, Intrinsic business risk, Growth risk, Instrumental variables}}, number = {{3}}, pages = {{535--570}}, title = {{{Determinants of market beta: the impacts of firm-specific accounting figures and market conditions}}}, doi = {{10.1007/s11156-013-0352-1}}, 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}}, }