@article{42902, author = {{Shnayien, Marie-Luise}}, journal = {{onlinejournal kultur & geschlecht}}, number = {{13}}, pages = {{1--18}}, title = {{{Der rosafarbene Elefant im Raum. Überlegungen zur fehlenden Wut über die NSA-Affäre}}}, year = {{2014}}, } @article{35167, abstract = {{Die Politiken bebilderter Berichterstattung und die Temporalität unserer gegenwärtigen Aufmerksamkeitsökonomie betrachtend, wird den Fragen nachgegangen, wieso die Reaktionen auf die NSA-Affäre so oft von Zynismus oder Resignation gekennzeichnet sind oder sogar ganz ausbleiben, und wer eigentlich betroffen ist und reagieren sollte. Die Überlegungen sind der Versuch, die NSA-Affäre im Spannungsfeld von Technikverliebtheit und Blackboxing, den Bedingungen von Medienereignissen und Geheimdienstpraktiken, der Krise des Journalismus sowie unseren Gewohnheiten im Umgang mit der uns umgebenden rechnenden Umwelt zu situieren.}}, author = {{Shnayien, Mary}}, journal = {{onlinejournal kultur & geschlecht}}, number = {{13}}, pages = {{1–18}}, title = {{{Der rosafarbene Elefant im Raum. Überlegungen zur fehlenden Wut über die NSA-Affäre}}}, year = {{2014}}, } @article{42801, abstract = {{We exhibit a practical algorithm for solving the constructive membership problem for discrete free subgroups of rank 2 in PSL₂(R) or SL₂(R). This algorithm, together with methods for checking whether a two-generator subgroup of PSL₂(R) or SL₂(R) is discrete and free, have been implemented in Magma for groups defined over real algebraic number fields.}}, author = {{Kirschmer, Markus and LEEDHAM-GREEN, CHARLES}}, issn = {{0017-0895}}, journal = {{Glasgow Mathematical Journal}}, keywords = {{General Mathematics}}, number = {{1}}, pages = {{173--180}}, publisher = {{Cambridge University Press (CUP)}}, title = {{{Computing with subgroups of the modular group }}}, doi = {{10.1017/s0017089514000202}}, volume = {{57}}, year = {{2014}}, } @article{42794, abstract = {{We exhibit a practical algorithm for solving the constructive membership problem for discrete free subgroups of rank 2 in PSL₂(R) or SL₂(R). This algorithm, together with methods for checking whether a two-generator subgroup of PSL₂(R) or SL₂(R) is discrete and free, have been implemented in Magma for groups defined over real algebraic number fields.}}, author = {{Eick, B. and Kirschmer, Markus and Leedham-Green, C.}}, issn = {{1461-1570}}, journal = {{LMS Journal of Computation and Mathematics}}, keywords = {{Computational Theory and Mathematics, General Mathematics}}, number = {{1}}, pages = {{345--359}}, publisher = {{Wiley}}, title = {{{The constructive membership problem for discrete free subgroups of rank 2 of SL₂(R)}}}, doi = {{10.1112/s1461157014000047}}, volume = {{17}}, year = {{2014}}, } @inbook{43901, author = {{Schroeter-Wittke, Harald}}, booktitle = {{Unterwegs im Experiment. Protestantische Transformationen im Ruhrgebiet}}, editor = {{Noss, Peter and Erne, Thomas}}, pages = {{215--234}}, title = {{{Protestantische Ruhrgebiets-Komponisten - Kulturtheologische Annäerhungen an ein disparates Phänomen}}}, year = {{2014}}, } @article{43902, author = {{Schroeter-Wittke, Harald}}, journal = {{Glaube und Lernen}}, pages = {{173--185}}, title = {{{Neue Geistliche Musik. Kulturwissenschaftliche Beobachtungen in religionspädagogischer Absicht}}}, volume = {{29}}, year = {{2014}}, } @article{22956, abstract = {{Parametric down-conversion (PDC) forms one of the basic building blocks for quantum optical experiments. However, the intrinsic multimode spectral-temporal structure of pulsed PDC often poses a severe hindrance for the direct implementation of the heralding of pure single-photon states or, for example, continuous-variable entanglement distillation experiments. To get rid of multimode effects narrowband frequency filtering is frequently applied to achieve a single-mode behavior. A rigorous theoretical description to accurately describe the effects of filtering on PDC, however, is still missing. To date, the theoretical models of filtered PDC are rooted in the discrete-variable domain and only account for filtering in the low-gain regime, where only a few photon pairs are emitted at any single point in time. In this paper we extend these theoretical descriptions and put forward a simple model, which is able to accurately describe the effects of filtering on PDC in the continuous-variable domain. This developed straightforward theoretical framework enables us to accurately quantify the tradeoff between suppression of higher-order modes, reduced purity, and lowered Einstein–Podolsky–Rosen entanglement, when narrowband filters are applied to multimode type-II PDC.}}, author = {{Christ, Andreas and Lupo, Cosmo and Reichelt, Matthias and Meier, Torsten and Silberhorn, Christine}}, issn = {{1050-2947}}, journal = {{Physical Review A}}, number = {{2}}, title = {{{Theory of filtered type-II parametric down-conversion in the continuous-variable domain: Quantifying the impacts of filtering}}}, doi = {{10.1103/physreva.90.023823}}, volume = {{90}}, year = {{2014}}, } @inproceedings{43914, abstract = {{Ultra-intense and CEP-stable waveforms in the multi-THz range control dynamical Bloch oscillations and interband polarization in bulk GaSe, leading to the emission of all-coherent high-order harmonics covering 12.7 optical octaves from THz to VIS regimes.}}, author = {{Meier, Torsten and Hohenleutner, M. and Schubert, O. and Langer, F. and Urbanek, B. and Lange, C. and Huttner, U. and Golde, D. and Kira, M. and Koch, S.W. and Huber, R.}}, booktitle = {{19th International Conference on Ultrafast Phenomena}}, isbn = {{1-55752-279-0}}, location = {{Okinawa Japan}}, title = {{{Phase-locked multi-THz high-harmonic generation by dynamical bloch oscillations in bulk semiconductors}}}, doi = {{10.1364/UP.2014.10.Thu.A.3}}, year = {{2014}}, } @article{22955, abstract = {{The dynamics of 3D Airy-vortex wave packets is studied under the action of strong self-focusing Kerr nonlinearity. Emissions of nonlinear 3D waves out of the main wave packets with the topological charges were demonstrated. Because of the conservation of the total angular momentum, charges of the emitted waves are equal to those carried by the parental light structure. The rapid collapse imposes a severe limitation on the propagation of multidimensional waves in Kerr media. However, the structure of the Airy beam carrier allows the coupling of light from the leading, most intense peak into neighboring peaks and consequently strongly postpones the collapse. The dependence of the critical input amplitude for the appearance of a fast collapse on the beam width is studied for wave packets with zero and nonzero topological charges. Wave packets carrying angular momentum are found to be much more resistant to the rapid collapse.}}, author = {{Driben, Rodislav and Meier, Torsten}}, issn = {{0146-9592}}, journal = {{Optics Letters}}, number = {{19}}, pages = {{5539--5542}}, title = {{{Nonlinear dynamics of Airy-vortex 3D wave packets: emission of vortex light waves}}}, doi = {{10.1364/ol.39.005539}}, volume = {{39}}, year = {{2014}}, } @article{22954, abstract = {{The dynamics of two component-coupled vectorial Airy beams is investigated. In the linear propagation regime, a complete analytic solution describes the breather-like propagation of two components that feature nondiffracting self-accelerating Airy behavior. The superposition of two beams with different input properties opens the possibility of designing more complex nondiffracting propagation scenarios. In the strongly nonlinear regime, the dynamics remain qualitatively robust as is revealed by direct numerical simulations. Because of the Kerr effect, the two beams emit solitonic breathers whose coupling period is compatible with the remaining Airy-like beams. The results of this study are relevant for the description of photonic and plasmonic beams that propagate in coupled planar waveguides, as well as for birefrigent or multiwavelength beams.}}, author = {{Driben, R. and Konotop, V. V. and Meier, Torsten}}, issn = {{0146-9592}}, journal = {{Optics Letters}}, number = {{19}}, pages = {{5523--5526}}, title = {{{Coupled Airy breathers}}}, doi = {{10.1364/ol.39.005523}}, volume = {{39}}, year = {{2014}}, } @misc{43913, author = {{Schroeter-Wittke, Harald}}, booktitle = {{Magazin für Theologie und Ästhetik. http://www.theomag.de/92/hsw18.htm}}, number = {{92}}, title = {{{Rilkes Stundenbuch. Neu erhört und zur Sprache gebracht (Gotthard Fermor (Hg.): Rainer Maria Rilke: Das Stunden-Buch. Erstes Buch: Das Buch vom Mönchischen Leben. Mit 2 Audio-CDs, Gütersloh 2014)}}}, year = {{2014}}, } @misc{43912, author = {{Schroeter-Wittke, Harald}}, booktitle = {{Magazin für Theologie und Ästhetik. http://www.theomag.de/91/hsw17.htm}}, number = {{91}}, title = {{{Siegfried Eckert: 2017. Zweitausendsiebzehn. Reformation statt Reförmchen. Eine Streitschrift zur Lage der Ev. Kriche ind Deutschland, Gütersloh 2014}}}, year = {{2014}}, } @article{43915, author = {{Schroeter-Wittke, Harald}}, journal = {{Göttinger Predigtmeditationen}}, pages = {{439--445}}, title = {{{Tag des Erzengels Michael und aller Engel - Michaelistag (29.9.2014). Hebr 1,7.13-14: Vom Genuss englischer Dienstleistungen}}}, volume = {{68}}, year = {{2014}}, } @article{43916, author = {{Schroeter-Wittke, Harald and Kirsner, Inge}}, journal = {{Predigtstudien VI/2}}, pages = {{184--190}}, title = {{{15. Sonntag nach Trinitatis. 1. Mose 2,4b-9(10-14)15: Unterwegs nach Eden}}}, year = {{2014}}, } @inproceedings{3939, abstract = {{Optical and infrared antennas provide a promising way to couple photons in and out of nanoscale structures. As counterpart to conventional radio antennas, they are able to increase optical felds in sub-wavelength volumes, to enhance excitation and emission of quantum emitters or to direct light, radiated by quantum emitters. The directed emission of these antennas has been mainly pursued by surface plasmon based devices, e.g. Yagi-Uda like antennas, which are rather complicated due to the coupling of several metallic particles. Also, like all metallic structures in optical or infrared regime, these devices are very sensitive to fabrication tolerances and are affected by strong losses. It has been shown recently, that such directed emission can be accomplished by dielectric materials as well. In this paper we present an optimization of nanoscopic antennas in the near infrared regime starting from a metallic Yagi-Uda structure. The optimization is done via a particle-swarm algorithm, using full time domain finite integration simulations to obtain the characteristics of the investigated structure, also taking into account substrates. Furthermore we present a dielectric antenna, which performs even better, due to the lack of losses by an appropriate choice of the dielectric material. These antennas are robust concerning fabrication tolerances and can be realized with different materials for both the antenna and the substrate, without using high index materials.}}, author = {{Hildebrandt, Andre and Reichelt, Matthias and Meier, Torsten and Förstner, Jens}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XVIII}}, editor = {{Betz, Markus and Elezzabi, Abdulhakem Y. and Song, Jin-Joo and Tsen, Kong-Thon}}, keywords = {{tet_topic_opticalantenna}}, pages = {{89841G--8941G--6}}, publisher = {{SPIE}}, title = {{{Engineering plasmonic and dielectric directional nanoantennas}}}, doi = {{10.1117/12.2036588}}, volume = {{8984}}, year = {{2014}}, } @article{22958, abstract = {{Dispersion management of periodically alternating fiber sections with opposite signs of two leading dispersion terms is applied for the regeneration of self-accelerating truncated Airy pulses. It is demonstrated that for such a dispersion management scheme, the direction of the acceleration of the pulse is reversed twice within each period. In this scheme the system features light hot spots in the center of each fiber section, where the energy of the light pulse is tightly focused in a short temporal slot. Comprehensive numerical studies demonstrate a long-lasting propagation also under the influence of a strong fiber Kerr nonlinearity.}}, author = {{Driben, R. and Meier, Torsten}}, issn = {{1050-2947}}, journal = {{Physical Review A}}, number = {{4}}, title = {{{Regeneration of Airy pulses in fiber-optic links with dispersion management of the two leading dispersion terms of opposite signs}}}, doi = {{10.1103/physreva.89.043817}}, volume = {{89}}, year = {{2014}}, } @misc{43911, author = {{Schroeter-Wittke, Harald}}, booktitle = {{Der Kirchentag. Das Magazin}}, number = {{4}}, pages = {{25}}, title = {{{Reformation statt Reförmchen}}}, year = {{2014}}, } @article{44054, abstract = {{Medienerfahrungen gehören zum kindlichen Alltag, doch die familialen Bedingungen medialen Lernens sind unterschiedlich. Die öffentlichen Bildungsinstitutionen sollen daher kompensatorisch wirken, um allen Kindern gleiche Chancen vor und für den Schulbeginn zu sichern. Dies gilt besonders im Kontext unserer Zuwanderungsgesellschaft, wo Kinder mit verschiedenen kulturellen Hintergründen aufwachsen. Im Fokus unseres Berichts steht ein Interventions- und Forschungsprojekt in Dortmund, wo über 60 % der Kinder in Einrichtungen der Frühen Bildung verschiedenkulturelle Familienhintergründe mitbringen. In Einzelmaßnahmen, in denen Medienbildung an weitere inhaltliche Bildungsaspekte und Themen angebunden ist, üben Kinder aus verschiedenen Herkunftskulturen gemeinsam das Produzieren und Kommunizieren mit und über Medien. Die Arbeit in den Kitas wird trianguliert evaluiert und Erzieherinnen wie Eltern werden über die Wahrnehmung der Kinder sowie den familiären Medienumgang befragt. Aus diesem Datenpool sollen hier Ergebnisse vorgestellt werden, wie türkische Kinder als größte Migrantengruppe in ihrer Medienkompetenz in den Familien und in der Kita wahrgenommen werden – wobei sich je nach Perspektive auffällige Unterschiede in der elterlichen und der professionellen Wahrnehmung kindlicher Medienkompetenz zeigen, sowohl genderspezifisch als auch kulturspezifisch.}}, author = {{Marci-Boehncke, Gudrun and Rath, Matthias}}, journal = {{Frühe Bildung}}, number = {{4}}, pages = {{203--213}}, publisher = {{Hogrefe}}, title = {{{Medienkompetenzwahrnehmung im Migrationskontext: Empirische Ergebnisse aus der Frühen Bildung bei türkischen und deutschen Kindern}}}, doi = {{10.1026/2191-9186/a000175}}, volume = {{3}}, year = {{2014}}, } @inproceedings{44172, author = {{Müller, Inez}}, booktitle = {{Leitkulturen und Wertediskussionen}}, editor = {{Platen, Edgar}}, isbn = {{978-3-86205-452-7}}, location = {{Universität Göteborg / Schweden}}, pages = {{21}}, publisher = {{iudicium Verlag}}, title = {{{Gier - Zur Kapitalismuskritik in "Johann Holtrop" von Rainald Goetz und in "Gesellschaft mit beschränkter Haftung" von Nora Bossong}}}, volume = {{13}}, year = {{2014}}, } @article{44341, author = {{Burban, Igor and Kreußler, B.}}, journal = {{Mathematische Nachrichten}}, number = {{2–3}}, pages = {{173–183}}, title = {{{Analytic moduli spaces of simple sheaves on families of integral curves}}}, volume = {{287}}, year = {{2014}}, }