@article{16008, author = {{Riemer, A. and Leuders, S. and Tröster, Thomas and Richard, H. A.}}, journal = {{DVM-Bericht 139, Werkstoffe und Fügeverfahren - Neue Herausforderungen für die Betriebsfestigkeit}}, publisher = {{Deutscher Verband für Materialforschung und -prüfung e.V.}}, title = {{{Untersuchung zyklisch belasteter SLM-Bauteile aus der Titan-Aluminium-Legierung TiAl6V4}}}, year = {{2012}}, } @inproceedings{16009, author = {{Leuders, S. and Riemer, A. and Tröster, Thomas and Richard, H. A.}}, location = {{Kassel}}, title = {{{Characterization and Comparison of Mechanical Properties of SLM Materials with Regard to Process Cycle Time Improvement}}}, year = {{2012}}, } @techreport{16012, author = {{Tröster, Thomas and Marten, Thorsten and Adelbert, Stefan and Kadim, Abdel}}, isbn = {{978-3-942541-18-3 }}, publisher = {{Abschlussberichte Forschungsvereinigung Stahlanwendung e.V., Verlag und Vertriebsgesellschaft mbH}}, title = {{{P 850 – Wirbelbetterwärmung von Platinen für das Presshärten}}}, year = {{2012}}, } @article{16015, author = {{Leuders, S. and Thöne, M. and Riemer, A. and Niendorf, T. and Tröster, Thomas and Richard, H.A. and Maier, H.J.}}, issn = {{0142-1123}}, journal = {{International Journal of Fatigue}}, pages = {{300--307}}, title = {{{On the mechanical behaviour of titanium alloy TiAl6V4 manufactured by selective laser melting: Fatigue resistance and crack growth performance}}}, doi = {{10.1016/j.ijfatigue.2012.11.011}}, year = {{2012}}, } @article{16084, author = {{Fallah Tehrani, A. and Cheng, W. and Dembczynski, K. and Hüllermeier, Eyke}}, journal = {{Machine Learning}}, number = {{1}}, pages = {{183--211}}, title = {{{Learning monotone nonlinear models using the Choquet integral}}}, volume = {{89}}, year = {{2012}}, } @article{16085, author = {{Bustince, H. and Pagola, M. and Mesiar, R. and Hüllermeier, Eyke and Herrera, F.}}, journal = {{IEEE Transactions on Fuzzy Systems}}, number = {{3}}, pages = {{405--415}}, title = {{{Grouping, overlap and generalized bientropic functions for fuzzy modeling of pairwise comparisons}}}, volume = {{20}}, year = {{2012}}, } @article{16087, author = {{Fürnkranz, J. and Hüllermeier, Eyke and Cheng, W. and Park, S.H.}}, journal = {{Machine Learning}}, number = {{1}}, pages = {{123--156}}, title = {{{Preference-based reinforcement learning: A formal framework and a policy iteration algorithm}}}, volume = {{89}}, year = {{2012}}, } @article{16088, author = {{Dembczynski, K. and Waegeman, W. and Cheng, W. and Hüllermeier, Eyke}}, journal = {{Machine Learning}}, number = {{1-2}}, pages = {{5--45}}, title = {{{On label dependence and loss minimization in multi-label classification}}}, volume = {{88}}, year = {{2012}}, } @article{16089, author = {{Shaker, Ammar and Hüllermeier, Eyke}}, journal = {{Evolving Systems}}, number = {{4}}, pages = {{235--249}}, title = {{{IBL Streams: A system for instance-based classification and regression on data streams}}}, volume = {{3}}, year = {{2012}}, } @article{16090, author = {{Dolorez Ruiz, M. and Hüllermeier, Eyke}}, journal = {{Information Sciences}}, pages = {{1--17}}, title = {{{A formal and empirical analysis of the fuzzy gamma rank correlation coefficient}}}, volume = {{206}}, year = {{2012}}, } @article{16091, author = {{Fallah Tehrani, A. and Cheng, W. and Hüllermeier, Eyke}}, journal = {{IEEE Transactions on Fuzzy Systems}}, number = {{6}}, pages = {{1102--1113}}, title = {{{Preference learning using the Choquet integral: The case of multipartite ranking}}}, volume = {{20}}, year = {{2012}}, } @article{16092, author = {{Fober, T. and Mernberger, M. and Klebe, G. and Hüllermeier, Eyke}}, journal = {{Molecular Informatics}}, number = {{6-7}}, pages = {{443--452}}, title = {{{Fingerprint kernels for protein structure comparison}}}, volume = {{31}}, year = {{2012}}, } @article{16093, author = {{Hüllermeier, Eyke and Rifqi, M. and Henzgen, Sascha and Senge, Robin}}, journal = {{IEEE Transactions on Fuzzy Systems}}, number = {{3}}, pages = {{546--556}}, title = {{{Comparing fuzzy partitions: A generalization of the Rand index and related measures}}}, volume = {{20}}, year = {{2012}}, } @article{16094, author = {{Senge, Robin and Fober, T. and Nasiri, N. and Hüllermeier, Eyke}}, journal = {{At-Atomatisierungstechnik}}, number = {{10}}, pages = {{622--629}}, title = {{{Fuzzy Pattern Trees: Ein alternativer Ansatz zur Fuzzy-Modellierung}}}, volume = {{60}}, year = {{2012}}, } @article{16109, author = {{Bartley, Tim and Donati, Gaia and Spring, Justin B. and Jin, Xian-Min and Barbieri, Marco and Datta, Animesh and Smith, Brian J. and Walmsley, Ian A.}}, issn = {{1050-2947}}, journal = {{Physical Review A}}, title = {{{Multiphoton state engineering by heralded interference between single photons and coherent states}}}, doi = {{10.1103/physreva.86.043820}}, year = {{2012}}, } @article{16238, author = {{Hankeln, Frederik and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{289--290}}, title = {{{Carbon Fibre Prepregs: Simulation of a Thermo-Mechanical-Chemical Coupled Problem}}}, doi = {{10.1002/pamm.201210134}}, year = {{2012}}, } @article{16242, author = {{Elsässer, Brigitta and Dohmeier-Fischer, Silvia and Fels, Gregor}}, issn = {{1610-2940}}, journal = {{Journal of Molecular Modeling}}, pages = {{3169--3179}}, title = {{{Theoretical investigation of the enzymatic phosphoryl transfer of β-phosphoglucomutase: revisiting both steps of the catalytic cycle}}}, doi = {{10.1007/s00894-011-1344-5}}, year = {{2012}}, } @book{1625, author = {{Krimphove, Dieter}}, pages = {{159}}, publisher = {{Haufe-Verlag}}, title = {{{Logik - Einführung in das Denken}}}, year = {{2012}}, } @inproceedings{16408, abstract = {{We present a parallel rendering system for heterogeneous PC clusters to visualize massive models. One single, powerful visualization node is supported by a group of backend nodes with weak graphics performance. While the visualization node renders the visible objects, the backend nodes asynchronously perform visibility tests and supply the front end with visible scene objects. The visualization node stores only currently visible objects in its memory, while the scene is distributed among the backend nodes’ memory without redundancy. To efficiently compute the occlusion tests in spite of that each backend node stores only a fraction of the original geometry, we complete the scene by adding highly simplified versions of the objects stored on other nodes. We test our system with 15 backend nodes. It is able to render a ≈ 350,M polygons (≈ 8.5,GiB) large aircraft model with 20, to 30,fps and thus allows a walk-through in real-time. }}, author = {{Suess, Tim and Koch, Clemens and Jähn, Claudius and Fischer, Matthias and Meyer auf der Heide, Friedhelm}}, booktitle = {{Advances in Visual Computing}}, isbn = {{9783642331787}}, issn = {{0302-9743}}, pages = {{502--512}}, title = {{{Asynchronous Occlusion Culling on Heterogeneous PC Clusters for Distributed 3D Scenes}}}, doi = {{10.1007/978-3-642-33179-4_48}}, volume = {{7431}}, year = {{2012}}, } @article{13886, author = {{Rautenberg, Jens and Bause, Fabian and Henning, Bernd}}, issn = {{0171-8096}}, journal = {{tm - Technisches Messen}}, pages = {{135--142}}, title = {{{Geführte akustische Wellen zur Flüssigkeitscharakterisierung}}}, doi = {{10.1524/teme.2012.0176}}, year = {{2012}}, } @inproceedings{13960, author = {{Bause, Fabian and Walther, Andrea and Henning, Bernd}}, title = {{{Numerische Nullstellensuche in Determinantenfunktionen mittels Intervallarithmetik und algorithmischem Differenzieren}}}, year = {{2012}}, } @inproceedings{13961, abstract = {{Typical examples for the sensory use of ultrasound in industry are the measurement of flow, level, density, viscosity or concentration. Most commercial devices only provide one of these quantities but a microprocessor based evaluation of the measured information in connection with extended models of the measurement setup may also extend the functionality of those sensors. In this contribution some trends for further developments of ultrasound flowmeters and ultrasonic chemical sensors will be outlined. Focusing on flow measurement, some functional enhancements like flow profile correction and the simultaneous identification of the flowing medium are discussed in more detail.}}, author = {{Henning, Bernd and Rautenberg, Jens}}, title = {{{Ultrasonic sensors for process applications}}}, year = {{2012}}, } @inproceedings{13962, author = {{Henning, Bernd}}, title = {{{Trends im Design von Ultraschallsensoren}}}, year = {{2012}}, } @inproceedings{13963, abstract = {{Polyamid 6 (PA 6), stammend aus der Gruppe der Polykondensate, ist ein thermoplastischer Kunststoff und zeichnet sich u.a. durch eine hohe Festigkeit und Steifigkeit bei geringen Rohstoff- und Herstellungskosten aus. Das Einsatzgebiet von Polyamiden ist sehr vielseitig. Neben dem massiven Einsatz in der Textilindustrie sei beispielsweise auch der Einsatz in Seilen und Trassen, Zahnrädern und Lagern genannt. Weiterhin findet PA 6 kompositäre Verwendung als Matrixmaterial in thermoplastischen Faserverbundmaterialien (u. a. endlosfaserverstärkte Organobleche) und ist dabei vor allem für die Automobilindustrie von immens steigender Bedeutung. Neben der bei PA ausgeprägten reversiblen Polykondensation, d.h. der Reaktion des Kunststoffes mit Wasser aus der Umgebungsluft, treten irreversible Prozesse (Thermooxidation, Photooxidation, Nachkondensation, $\ldots$) auf, welche seine chemischen und mechanischen Eigenschaften beeinflussen. In diesem Beitrag sollen die Auswirkungen hydrothermischer Alterung durch Temperatur und Feuchtigkeit, auf die akustischen bzw. mechanischen Eigenschaften zum einen im hochfrequenten (Ultraschall) und zum anderen im quasistatischen Bereich charakterisiert werden. Dazu werden PA 6 Probekörper mittels Klimawechseltests künstlich gealtert und in zwei verschiedenen Versuchsaufbauten beurteilt. Zum einen werden hohlzylindrische Proben zur Charakterisierung im Ultraschallbereich (Schallgeschwindigkeit, Schallkennimpedanz, Schallabsorption) und zum anderen Schulterstäbe zur Charakterisierung der mechanischen Materialeigenschaften im quasistatischen Bereich verwendet. Die akustischen Materialkenngrößen der Ultraschallcharakterisierung und die mechanischen Materialkenngrößen aus dem quasistatischen Bereich, werden abschließend miteinander korreliert und Zusammenhänge dargestellt.}}, author = {{Bause, Fabian and Budde, Christopher and Rautenberg, Jens and Henning, Bernd and Moritzer, Elmar}}, location = {{Darmstadt}}, title = {{{Korrelation hochfrequenter und quasistatischer Materialkenngrössen zur Charakterisierung verschiedener Alterungsstadien von Polyamid 6}}}, year = {{2012}}, } @misc{13999, abstract = {{A very promising approach for the ultrasonic identification of highly damping viscoelastic polymers has been proposed by Rautenberg. He uses transmission measurements through hollow cylindrical shaped test samples which are modeled as waveguides. The measurement effect relies on multiple mode-conversions at the waveguide's outer and inner boundaries and is evaluated based on an inverse approach. In this contribution we discuss different signal characteristics of the obtained dispersed signals with respect to their sensitivity to certain material parameters. Based on these sensitivities we propose a multiphase optimization scheme to increase the optimization's convergence.}}, author = {{Bause, Fabian and Rautenberg, Jens and Henning, Bernd}}, title = {{{Sensitivity study of signal characteristics for an inverse waveguide based approach of material characterization}}}, year = {{2012}}, } @inproceedings{14000, abstract = {{In optischen Messeinrichtungen (Abstandsmessung, NIR-Materialfeuchtemessung) werden häufig in einem schmalen Wellenlängenbereich strahlende, gepulste Infrarot-Emitter eingesetzt. Leistungsstarke Strahlungspulse sind notwendig, führen aber zu einer thermisch bedingten Abnahme der emittierten Strahlungsleistung und zu einer Verschiebung der Maximumwellenlänge. Die hierdurch entstehenden Messunsicherheiten werden aufgezeigt und Konzepte zu deren Verringerung dargestellt.}}, author = {{Hoof, Christian and Schlottmann, J{\ and Wetzlar, Dietmar and Henning, Bernd}}, booktitle = {{16. GMA/ITG-Fachtagung. Sensoren und Messsysteme}}, editor = {{Service GmbH}, AMA}}, isbn = {{978-3-9813484-0-8}}, pages = {{748--757}}, title = {{{Konzepte zur Regelung der Strahlungsleistung pulsbetriebener IR-Emitter}}}, year = {{2012}}, } @inproceedings{14001, abstract = {{In der Ultraschallakustik besteht häufig die Notwendigkeit die räumliche und zeitliche Ausbreitung von Ultraschall zu charakterisieren. Das Schlierenverfahren ist ein schnelles und nichtinvasives Verfahren zur Visualisierung von Ultraschallfeldern in Flüssigkeiten. Bei diesem Verfahren wird eine ebene elektromagnetische Welle an einer Ultraschallwelle gebeugt. Das Beugungsmuster wird durch ein optisches System in der Fourierebene abgebildet. Um die mittlere Helligkeit in der Darstellung der Ultraschallwellen zu eliminieren, erfolgt eine Ortsfilterung in der Fourierebene. Als Ortsfilter werden in der Regel eine Messerschneide oder eine Punktblende eingesetzt. Hierbei wird ein Teil der Fourierebene ausgeblendet und der unbeeinflusste Anteil in Richtung des Bildaufnahmesensors transmittiert. Der Einsatz solcher Amplitudenfilter hat den Nachteil, dass die Phaseninformation einer Schallwelle in der Abbildung der Ultraschallwelle nicht erfasst wird. Der am Fachgebiet Elektrische Messtechnik der Universität Paderborn entwickelte Schlierenmessplatz ist durch ein variables Amplitudenfilter gekennzeichnet. In diesem Beitrag wird ein Verfahren vorgestellt, wie durch Kombination von unterschiedlichen Filtern die Phaseninformation einer Ultraschallwelle rekonstruiert werden kann. Hierzu werden die mathematischen Grundlagen zur Rekonstruktion der Phase hergeleitet und die ersten Messergebnisse vorgestellt.}}, author = {{Olfert, Sergei and Henning, Bernd}}, pages = {{939--940}}, title = {{{Rekonstruktion der Phaseninformation aus Schlierenaufnahmen}}}, year = {{2012}}, } @phdthesis{14002, author = {{Rautenberg, Jens}}, keywords = {{akustische Wellenleiter, Kunststoffe, Materialdatenbestimmung, Transmissionsmessung}}, publisher = {{Elektrotechnik}}, title = {{{Ein wellenleiterbasiertes Verfahren zur Bestimmung von Materialdaten für die realitätsnahe Simulation von Schallausbreitungsphänomenen am Beispiel stark absorbierender Kunststoffe}}}, year = {{2012}}, } @article{14003, abstract = {{Das Spektrum akustischer Wellenleiter zur Flüssig-keitscharakterisierung reicht von der Seismologie und Geophysik mit Wellenleiterdimensionen von einigen km über die zerstörungsfreie Prüfung bis hin zur Prozessmesstechnik mit Sensordimensio-nen von wenigen mm. In diesem Beitrag wird ein phänomenologischer Weg zur Klassifizierung der Wellenleiter entwickelt, wobei stets die Oberflä-chenauslenkungen an der Wellenleitergrenze und die Anzahl der an der Wellenausbreitung beteiligten Moden Berücksichtigung finden. Im weiteren Verlauf werden Möglichkeiten zur Modellierung, Simulation und Messung multimodaler Wellenausbreitung im akustischen Wellenleiter gezeigt.}}, author = {{Rautenberg, Jens and Bause, Fabian and Henning, Bernd}}, journal = {{Technisches Messen}}, number = {{3}}, pages = {{135--142}}, title = {{{Geführte akustische Wellen zur Flüssigkeitscharakterisierung}}}, volume = {{79}}, year = {{2012}}, } @inproceedings{14004, abstract = {{Es wird ein Wellenleiter basiertes Messsystem vorgestellt, mit dem anhand einer einzigen Transmissionsmessung alle Daten bestimmt werden können, die zur Simulation von Schallausbreitungsphänomenen in stark absorbierenden und schwach anisotropen Materialien erforderlich sind. Auf diese Weise ist es fortan möglich die akustischen Kenngrößen (winkel- und frequenzabhängige Schallgeschwindigkeiten und frequenzabhängige Absorption) verschieden konditionierter Materialproben (Temperatur, Feuchtigkeit, Alter) simultan zu erfassen. Genutzt wird dazu die mehrmalige Modekonversion an den Mantelflächen eines hohlzylindrischen akustischen Wellenleiters, wonach ein Empfangssignal mehrere Signalgruppen aufweist, deren absolute Laufzeit, Laufzeitdifferenzen und Amplituden in Abhängigkeit der Materialkenngrößen stark variieren. Grundlegend für die realisierte und in diesem Beitrag beschriebene inverse Bestimmung der akustischen Kenngrößen ist ein ganzheitliches Modell der Schallanregung, -ausbreitung und -detektion, welches die schnelle Berechnung der Empfangssignale erlaubt. Die gezielte Variation der Modell-Eingangsgrößen führt schließlich zu einer bestmöglichen Übereinstimmung zwischen berechneten und gemessenen Empfangssignalen, sodass die final angesetzten Modell-Eingangsgrößen eine gute Approximation der gesuchten materialspezifischen akustischen Kenngrößen darstellen. Im Rahmen dieses Beitrags werden der Messaufbau, wesentliche Teile der Modellierung sowie die grundätzliche Vorgehensweise zur Anwendung der inversen Messmethode gezeigt. Anhand gemessener, berechneter und mittels Finiter Elemente Methode simulierter Signale wird das Verfahren für einen Werkstoff, spritzgegossenes Polypropylen, demonstriert.}}, author = {{Rautenberg, Jens and Bause, Fabian and Henning, Bernd}}, editor = {{Service GmbH, AMA}}, isbn = {{978-3-9813484-0-8}}, location = {{Nürnberg}}, pages = {{332--343}}, title = {{{Messsystem zur Bestimmung akustischer Kenngrößen stark absorbierender, transversal isotroper Kunststoffe}}}, year = {{2012}}, } @inproceedings{14005, abstract = {{If a guided Lamb wave leaks energy from a plate into a surrounding fluid, the radiated almost plane wave has a frequency dependent angle towards the boundary. This radia- tion angle can be calculated by numerical determination of the plates' phase velocities. We also measured the radiation angle in Schlieren photographs and found a mentionable discrepancy to the calculated angles in certain frequency regions. A first approach by modifying the boundary condition could not re- solve the observed discrepancies, but a reinterpretation of the Schlieren photographs as interference patterns of different Leaky Lamb waves leads to a good correspondence between measured and calculated values.}}, author = {{Rautenberg, Jens and Olfert, Sergei and Bause, Fabian and Henning, Bernd}}, location = {{Dresden}}, title = {{{Validation of analytically modeled Leaky Lamb radiation using Schlieren photography}}}, year = {{2012}}, } @inproceedings{14006, abstract = {{Bei der Ultraschall-basierten Abstandsmessung mit einem einzelnen Schallwandler ergibt sich durch das Prinzip bedingt eine Blindzone. Während und unmittelbar nach der Anregung durch das Sendesignal ist es im Allgemeinen nicht möglich, das Empfangssignal am Ultraschallwandler auszuwerten. Eine Verwendung von codierten Sendesignalen (z.B. zur Unterscheidung verschiedener Sensoren) verlängert diesen Blindbereich zusätzlich. Dieser Beitrag zeigt eine Möglichkeit zur Realisierung eines simultanen Sende- und Empfangsbetriebs mit einem einzelnen Schallwandler. Dadurch wird es möglich, die Blindzone auch bei sehr langen Sendesignalen zu eliminieren. Dazu wird der Ultraschallwandler über einen Vorwiderstand betrieben und dessen Spannung gemessen. Mittels eines mathematischen Modells kann das elektrische Sendesignal, welches am Ultraschallwandler anliegt, bestimmt werden. Die Subtraktion dieses Signals von der gemessenen Schallwandlerspannung liefert das elektrische Empfangssignal. Aufgrund von z.B. Temperatureinflüssen ändern sich die elektrischen Eigenschaften des Ultraschallwandlers ständig, wodurch eine Anpassung des Modells notwendig wird. Daher kann die Modellidentifikation nicht im Vorfeld mit einer Freifeldmessung erfolgen, sondern ist permanent während des Betriebes notwendig. Tritt dabei ein Empfangssignal z.B. infolge einer Reflexion auf, so wird die Bestimmung der Modellparameter gestört. Durch eine Bewertung der ermittelten Modelle kann die Robustheit einer Abstandsmessung erhöht werden}}, author = {{Schröder, Andreas and Henning, Bernd}}, editor = {{Service GmbH, AMA}}, isbn = {{978-3-9813484-0-8}}, location = {{Nürnberg}}, pages = {{352--360}}, title = {{{Blindzonenfreie Ultraschall-Abstandsmessung mit codierten Sendesignalen}}}, year = {{2012}}, } @inproceedings{14007, abstract = {{Ultraschall-Abstandssensoren besitzen meist nur einen Schallwandler und dadurch Prinzip bedingt einen Mindestabstand. Eine Möglichkeit diesen Mindestabstand zu reduzieren, besteht in der Realisierung eines simultanen Sendeund Empfangsbetriebes. In diesem Beitrag wird dies durch eine digitale Signalverarbeitung realisiert. Hierzu ist es notwendig, das Schallwandlersignal und das elektrische Sendesignal zu digitalisieren. Mit der Kenntnis des Schallwandlerverhaltens sowie des elektrischen Sendesignals wird das zu erwartende Schallwandlersignal modellbasiert berechnet und vom gemessenen Schallwandlersignal subtrahiert, um so das Empfangssignal zu bestimmen. Dabei liegen die Herausforderungen in der Ermittlung der Parameter eines repräsentativen Schallwandlermodells sowie der Gewährleistung einer robusten Echodetektion.}}, author = {{Schröder, Andreas and Henning, Bernd}}, isbn = {{978-3-8440-1312-2}}, location = {{Aachen}}, pages = {{143--152}}, title = {{{Luftultraschall-Abstandsmessung mit digitaler Signalverarbeitung zur Verkürzung des Mindestabstandes}}}, year = {{2012}}, } @inproceedings{14008, abstract = {{Computer aided simulation of guided acoustic waves in single- or multilayered waveguides is an essential tool for several applications of acoustics and ultrasonics (i.e. pipe inspection, noise reduction). To simulate wave propagation in geometrically simple waveguides (plates or rods), one may employ the analytical global matrix method [1]. This requires the computation of all roots of the determinate of a certain submatrix. The evaluation of all real or even complex roots is actually the methods most concerning restriction. Previous approaches base on so called mode-tracers which use the physical phenomenon that solutions (roots) appear in a certain pattern (waveguide modes) and thus use known solutions to limit the root finding algorithms searchspace with respect to consecutive solutions. As the limitation of searchspace might be unstable in some cases, we propose to replace the mode-tracer with a suitable version of an interval Newton method based on Intlab [2]. To apply this interval based method, we extended the interval and derivative computation provided by Intlab such that corresponding information is also available for Bessel functions used in the circular model (rods) of acoustic waveguides. We present numerical results of a simple acoustic waveguide and discuss extensions required for more realistic scenarios.}}, author = {{Walther, Andrea and Bause, Fabian and Henning, Bernd}}, location = {{Darmstadt}}, title = {{{Computing roots for the analytic modeling of guided waves in acoustic waveguides}}}, year = {{2012}}, } @article{14009, abstract = {{The contribution presents the sensor application of a resonance-induced extraordinary transmission through a regular phononic crystal consisting of a metal plate with a periodic arrangement of holes in a square lattice at normal incidence of sound. The characteristic transmission peak has been found to strongly depend on sound velocity of the liquid the plate is immersed in. The respective peak maximum frequency can serve as measure for the concentration of a component in the liquid mixture, if a beneficial relation to the speed of sound of the liquid exists. Experimental verification has been performed with mixtures of water and propanol as model system. Here we especially pay attention to numerical calculations based on EFIT and COMSOL which reveal more insides to the wave propagation characteristics. Experimental investigations with Schlieren method and laser interferometry support the theoretical findings.}}, author = {{Zubtsoc, Mikhail and Lucklum, Ralf and Ke, Manzhu and Oseev, Alexandr and Grundmann, Ralf and Henning, Bernd and Hempel, Ulrike}}, journal = {{Sensors and Actuators A: Physical}}, pages = {{118--124}}, title = {{{2D phononic crystal sensor with normal incidence of sound}}}, volume = {{186}}, year = {{2012}}, } @misc{13074, author = {{Cook, Alejandro and Hellebrand, Sybille and Wunderlich, Hans-Joachim}}, keywords = {{WORKSHOP}}, title = {{{Eingebaute Selbstdiagnose mit zufälligen und deterministischen Mustern}}}, year = {{2012}}, } @inproceedings{13120, author = {{Cheng, W. and Hüllermeier, Eyke and Waegeman, W. and Welker, V.}}, booktitle = {{In Proceedings NIPS-2012, 26th Annual Conference on Neural Information Processing Systems, Lake Tahoe, Nevada, USA}}, title = {{{Label ranking with partial abstention based on thresholded probalistic models}}}, year = {{2012}}, } @inproceedings{13191, author = {{Cheng, W. and Hüllermeier, Eyke}}, booktitle = {{Proceedings ECML/PKDD-2012, European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases, Bristol, UK}}, title = {{{Probability estimation for mulit-class classification based on label ranking}}}, year = {{2012}}, } @inproceedings{13192, author = {{Dembczynski, K. and Kotlowski, W. and Hüllermeier, Eyke}}, booktitle = {{in Proceedings ICML-2012, International Conference on Machine Learning, Edinburgh, Scotland}}, editor = {{Langford, J. and Pineau, J.}}, title = {{{Consistent multilabel ranking through univariate loss minimization}}}, year = {{2012}}, } @inproceedings{13193, author = {{Dembczynski, K. and Waegeman, W. and Hüllermeier, Eyke}}, booktitle = {{In Proceedings ECAI-2012, 20th European Conference on Artificial Inteligence, Montpellier, France }}, pages = {{294--299}}, publisher = {{IOS Press}}, title = {{{An analysis of chaining in multi-label classification}}}, year = {{2012}}, } @article{13255, author = {{Trier, Matthias and Molka-Danielsen, Judith}}, issn = {{0960-085X}}, journal = {{European Journal of Information Systems}}, pages = {{317--335}}, title = {{{Sympathy or strategy: social capital drivers for collaborative contributions to the IS community}}}, doi = {{10.1057/ejis.2012.27}}, year = {{2012}}, } @inproceedings{13325, abstract = {{challenge for the digital preservation community. While the methodological frameworks for selecting these properties provide a good foundation, a continued discussion is necessary for further clarifying and improving the available methods. This paper advances earlier work by building on the existing InSPECT framework and improving its capabilities of working with complex/compound objects like blogs. The modifications enable a more thorough analysis of object structures, accentuate the differences and similarities between the framework’s two streams of analysis (i.e. Object and Stakeholder analysis) and, subsequently, improve the final reformulation of the properties. To demonstrate the applicability of the modified framework, thepaper presents a use case of a blog preservation initiative that is informed by stakeholder interviews and evaluation of structural and technological foundations of blogs. It concludes by discussing the limitations of the approach and suggesting directions for future research.}}, author = {{Stepanyan, Karen and Gkotsis, George and Kalb, Hendrik and Kim, Yunhyong and Cristea, Alexandra I. and Joy, Mike and Trier, Matthias and Ross, Seamus}}, booktitle = {{iPress 2012}}, editor = {{Moore, Reagan and Ashley, Kevin and Ross, Seamus}}, keywords = {{Blogs, Weblogs, Digital Preservation, Significant Properties}}, pages = {{218--224}}, publisher = {{University of Toronto Press}}, title = {{{Blogs as Objects of Preservation: Advancing the Discussion on Significant Properties}}}, year = {{2012}}, } @inproceedings{13326, abstract = {{Communication within online social network applications enables users to express and share sentiments electronically. Existing studies examined the existence or distribution of sentiments in online communication at a general level or in small-observed groups. Our paper extends this research by analyzing sentiment exchange within social networks from an ego-network perspective. We draw from research on social influence and social attachment to develop theories of node polarization, balance effects and sentiment mirroring within communication dyads. Our empirical analysis covers a multitude of social networks in which the sentiment valence of all messages was determined. Subsequently we studied ego-networks of focal actors (ego) and their immediate contacts. Results support our theories and indicate that actors develop polarized sentiments towards individual peers but keep sentiment in balance on the ego-network level. Further, pairs of nodes tend to establish similar attitudes towards each other leading to stable and polarized positive or negative relationships}}, author = {{Hillmann, Robert and Trier, Matthias}}, booktitle = {{AMCIS 2012 Proceedings}}, editor = {{Joshi, K.D. and Yoo, Youngjin}}, keywords = {{Social Network Analysis, Ego-Network Analysis, Node Polarization, Sentiment Dissemination}}, publisher = {{Association for Information Systems. AIS Electronic Library (AISeL)}}, title = {{{Sentiment Polarization and Balance among Users in Online Social Networks}}}, volume = {{24}}, year = {{2012}}, } @inproceedings{13327, abstract = {{Blogging has often been described as writing an online diary but, nowadays, it is more diverse and a considerable amount of blogs forms a common interconnected resource – the blogosphere – with comprehensive societal impact. While various studies have inquired social-psychological influenceson the intention to contribute to an individual blog, the perceptions related to creating such a common valuable good have not yet been focussed. Therefore, we introduce a new construct – the oeuvre of blogging – to better account for the notion of the blogosphere as a collective outcome. Furthermore, we propose a research model to inquire the influence of individual and collective beliefs on the oeuvre in comparison to short-term blogging activity. We conducted an online survey with 509 international distributed bloggers to test our model. The results of our study provide support for the importance of an oeuvre construct to explain influences on bloggers and blogging}}, author = {{Kalb, Hendrik and Trier, Matthias}}, booktitle = {{ECIS 2012 Proceedings}}, editor = {{Pries-Heje, Jan and Chiasson, Mike and Wareham, Jonathan and Busquets, Xavier and Valor, Josep and Seiber, Sandra}}, keywords = {{Blog, Blogosphere, Collective benefit, PLS, Knowledge sharing}}, publisher = {{Association for Information Systems. AIS Electronic Library (AISeL)}}, title = {{{The Blogosphere as Oeuvre: Individual and Collective Influence on Bloggers}}}, year = {{2012}}, } @inproceedings{13331, abstract = {{Communication in online social networks has been analyzed for some time regarding the expression of sentiments. So far, very little is known about the relationship between sentiments and network emergence, dissemination patternsand possible differences between positive and negative sentiments. The dissemination patterns analyzed in this study consist of network motifs based on triples of actors and the ties among them. These motifs are associated with common social network effects to derive meaningful insights about dissemination activities. The data basis includes several thousand social networks with textual messages classified according to embedded positive and negative sentiments. Based on this data, sub-networks are extracted and analyzed with a dynamic network motif analysis to determine dissemination patterns and associated network effects. Results indicate that the emergence of digital social networks exhibits a strong tendency towards reciprocity, followed by the dominance ofhierarchy as an intermediate step leading to social clustering with hubs and transitivity effects for both positive and negative sentiments to the same extend. Sentiments embedded in exchanged textual messages do only play a secondary role in network emergence and do not express differences regarding the emergence of network patterns.}}, author = {{Hillmann, Robert and Trier, Matthias}}, booktitle = {{Proceedings of the 2012 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining}}, isbn = {{9780769547992}}, keywords = {{Social Network Analysis, Dynamic Network Motif Analysis, Sentiment Dissemination, Networking Effects, Triads}}, pages = {{510--515}}, publisher = {{IEEE}}, title = {{{Dissemination Patterns and Associated Network Effects of Sentiments in Social Networks}}}, year = {{2012}}, } @misc{13462, author = {{Lewis, Peter and Platzner, Marco and Yao, Xin}}, publisher = {{Awareness Magazine}}, title = {{{An outlook for self-awareness in computing systems}}}, year = {{2012}}, } @inbook{10153, author = {{Hüllermeier, Eyke}}, booktitle = {{Combining Experimentation and Theory}}, editor = {{Trillas, E. and Bonissone, P.P. and Magdalena, L. and Kacprzyk, J.}}, pages = {{123--135}}, publisher = {{Springer}}, title = {{{Fuzzy rules in data mining: From fuzzy associations to gradual dependencies}}}, volume = {{271}}, year = {{2012}}, } @article{10170, author = {{Brinkmann, Gunnar and Crevals, Simon and Melot, Hadrien and Rylands, Leanne J. and Steffen, Eckhard}}, journal = {{Discrete Mathematics. and Theoretical Computer Science}}, pages = {{159--174}}, title = {{{α-labelings and the structure of trees with nonzero α-deficit }}}, volume = {{14.1}}, year = {{2012}}, } @article{10171, author = {{Steffen, Eckhard}}, journal = {{Discrete Mathematics}}, pages = {{2757--2759}}, title = {{{Nearly nowhere-zero r-flow graphs}}}, volume = {{312}}, year = {{2012}}, } @article{10172, author = {{Mkrtchyan, Vahan and Steffen, Eckhard}}, journal = {{J. Graph Theory}}, pages = {{473--482}}, title = {{{Maximum Δ-edge-colorable subgraphs of class II graphs}}}, volume = {{70}}, year = {{2012}}, } @article{10173, author = {{Mkrtchyan, Vahan and Steffen, Eckhard}}, journal = {{Discrete Mathematics}}, pages = {{476--478}}, title = {{{Measures of edge-uncolorability}}}, volume = {{312}}, year = {{2012}}, } @article{13531, author = {{Schmidt, Christian and Breuer, Tobias and Wippermann, Stefan and Schmidt, Wolf Gero and Witte, Gregor}}, issn = {{1932-7447}}, journal = {{The Journal of Physical Chemistry C}}, pages = {{24098--24106}}, title = {{{Substrate Induced Thermal Decomposition of Perfluoro-Pentacene Thin Films on the Coinage Metals}}}, doi = {{10.1021/jp307316r}}, volume = {{116}}, year = {{2012}}, } @article{13534, author = {{Wall, Simone and Krenzer, Boris and Wippermann, Stefan and Sanna, Simone and Klasing, Friedrich and Hanisch-Blicharski, Anja and Kammler, Martin and Schmidt, Wolf Gero and Horn-von Hoegen, Michael}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, number = {{18}}, title = {{{Atomistic Picture of Charge Density Wave Formation at Surfaces}}}, doi = {{10.1103/physrevlett.109.186101}}, volume = {{109}}, year = {{2012}}, } @article{13535, author = {{Sanna, S. and Schmidt, Wolf Gero}}, issn = {{0885-3010}}, journal = {{IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control}}, number = {{9}}, pages = {{1925--1928}}, title = {{{Ferroelectric phase transition in LiNbO3: Insights from molecular dynamics}}}, doi = {{10.1109/tuffc.2012.2408}}, volume = {{59}}, year = {{2012}}, } @article{13536, author = {{Riefer, Arthur and Sanna, Simone and Gavrilenko, Alexander V. and Schmidt, Wolf Gero}}, issn = {{0885-3010}}, journal = {{IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control}}, number = {{9}}, pages = {{1929--1933}}, title = {{{Linear and nonlinear optical response of LiNbO3 calculated from first principles}}}, doi = {{10.1109/tuffc.2012.2409}}, volume = {{59}}, year = {{2012}}, } @article{13538, author = {{Riefer, A. and Sanna, S. and Schmidt, Wolf Gero}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{12}}, title = {{{Polarization-dependent methanol adsorption on lithium niobate Z-cut surfaces}}}, doi = {{10.1103/physrevb.86.125410}}, volume = {{86}}, year = {{2012}}, } @article{13539, author = {{Rode, S. and Hölscher, R. and Sanna, S. and Klassen, S. and Kobayashi, K. and Yamada, H. and Schmidt, Wolf Gero and Kühnle, A.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{7}}, title = {{{Atomic-resolution imaging of the polar (0001¯) surface of LiNbO3in aqueous solution by frequency modulation atomic force microscopy}}}, doi = {{10.1103/physrevb.86.075468}}, volume = {{86}}, year = {{2012}}, } @article{13541, author = {{Landmann, M. and Köhler, T. and Köppen, S. and Rauls, E. and Frauenheim, T. and Schmidt, Wolf Gero}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{6}}, title = {{{Fingerprints of order and disorder in the electronic and optical properties of crystalline and amorphous TiO2}}}, doi = {{10.1103/physrevb.86.064201}}, volume = {{86}}, year = {{2012}}, } @article{13542, author = {{Thissen, Peter and Peixoto, Tatiana and Longo, Roberto C. and Peng, Weina and Schmidt, Wolf Gero and Cho, Kyeongjae and Chabal, Yves J.}}, issn = {{0002-7863}}, journal = {{Journal of the American Chemical Society}}, pages = {{8869--8874}}, title = {{{Activation of Surface Hydroxyl Groups by Modification of H-Terminated Si(111) Surfaces}}}, doi = {{10.1021/ja300270w}}, volume = {{134}}, year = {{2012}}, } @article{13543, author = {{Rauls, E. and Schmidt, Wolf Gero and Pertram, T. and Wandelt, K.}}, issn = {{0039-6028}}, journal = {{Surface Science}}, pages = {{1120--1125}}, title = {{{Interplay between metal-free phthalocyanine molecules and Au(110) substrates}}}, doi = {{10.1016/j.susc.2012.03.010}}, volume = {{606}}, year = {{2012}}, } @article{13545, author = {{Landmann, M and Rauls, E and Schmidt, Wolf Gero}}, issn = {{0953-8984}}, journal = {{Journal of Physics: Condensed Matter}}, title = {{{The electronic structure and optical response of rutile, anatase and brookite TiO2}}}, doi = {{10.1088/0953-8984/24/19/195503}}, volume = {{24}}, year = {{2012}}, } @article{13546, author = {{Riefer, A. and Rauls, E. and Schmidt, Wolf Gero and Eberhard, J. and Stoll, I. and Mattay, J.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{16}}, title = {{{2-Aminopyrimidine-silver(I) based organic semiconductors: Electronic structure and optical response}}}, doi = {{10.1103/physrevb.85.165202}}, volume = {{85}}, year = {{2012}}, } @article{13548, author = {{Thissen, Peter and Thissen, Vera and Wippermann, Stefan and Chabal, Yves J. and Grundmeier, Guido and Schmidt, Wolf Gero}}, issn = {{0039-6028}}, journal = {{Surface Science}}, pages = {{902--907}}, title = {{{pH-dependent structure and energetics of H2O/MgO(100)}}}, doi = {{10.1016/j.susc.2012.01.018}}, volume = {{606}}, year = {{2012}}, } @article{13560, author = {{Hölscher, R. and Sanna, S. and Schmidt, Wolf Gero}}, issn = {{1862-6351}}, journal = {{physica status solidi (c)}}, number = {{6}}, pages = {{1361--1365}}, title = {{{Adsorption of OH and H at the LiNbO3(0001) surface}}}, doi = {{10.1002/pssc.201100534}}, volume = {{9}}, year = {{2012}}, } @article{13820, author = {{Schmidt, Wolf Gero and Wippermann, S. and Sanna, S. and Babilon, M. and Vollmers, N. J. and Gerstmann, Uwe}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, number = {{2}}, pages = {{343--359}}, title = {{{In-Si(111)(4 × 1)/(8 × 2) nanowires: Electron transport, entropy, and metal-insulator transition}}}, doi = {{10.1002/pssb.201100457}}, volume = {{249}}, year = {{2012}}, } @misc{30162, author = {{Ficara, Elena}}, booktitle = {{Fichte-Studien}}, pages = {{309 -- 312}}, title = {{{Forster, Michael, Kant and Skepticism, Princeton 2008}}}, volume = {{40}}, year = {{2012}}, } @article{30129, author = {{Ficara, Elena}}, journal = {{Fichte-Studien}}, pages = {{95 -- 110}}, title = {{{Skeptizismus und Philosophie bei Kant und Hegel }}}, volume = {{39}}, year = {{2012}}, } @book{30078, editor = {{Ficara, Elena}}, publisher = {{Rodopi}}, title = {{{Skeptizismus und Philosophie. Kant, Fichte, Hegel. Fichte-Studien 39}}}, year = {{2012}}, } @inproceedings{29600, author = {{Peters, Wilhelm and Wallscheid, Oliver and Böcker, Joachim}}, booktitle = {{IECON 2012-38th Annual Conference on IEEE Industrial Electronics Society}}, pages = {{2877–2882}}, title = {{{A precise open-loop torque control for an interior permanent magnet synchronous motor (IPMSM) considering iron losses}}}, year = {{2012}}, } @article{3075, author = {{Schmitz, Hendrik}}, journal = {{Applied Economics}}, number = {{34}}, pages = {{4455--4468}}, title = {{{More health care utilization with more insurance coverage? Evidence from a latent class model with German data}}}, doi = {{10.1080/00036846.2011.591733}}, volume = {{44}}, year = {{2012}}, } @inproceedings{30325, author = {{Figge, Heiko and Fröhleke, Norbert and Böcker, Joachim and Schafmeister, Frank}}, booktitle = {{Proc. IEEE International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM)}}, location = {{Nuremberg, Germany}}, pages = {{1 -- 8}}, publisher = {{IEEE}}, title = {{{Cost-Effective Implementation of a Digitally Controlled LLC Resonant Converter for Application in Server- and Telecom-PSUs}}}, year = {{2012}}, } @article{30324, author = {{Schafmeister, Frank and Kolar, Johann}}, journal = {{IEEE Transactions on Power Electronics}}, number = {{1}}, pages = {{194 -- 210}}, publisher = {{IEEE}}, title = {{{Novel Hybrid Modulation Schemes Significantly Extending the Reactive Power Control Range of All Matrix Converter Topologies With Low Computational Effort}}}, volume = {{59}}, year = {{2012}}, } @inbook{30343, author = {{Kolar, Johann and Schafmeister, Frank}}, booktitle = {{Lehrbuch Leistungselektronische Schaltungen }}, editor = {{Schröder, Dierk}}, isbn = {{978-3-642-30103-2}}, pages = {{195 -- 296}}, publisher = {{Springer Vieweg Verlag}}, title = {{{Matrixkonverter, Kapitel 3.8}}}, year = {{2012}}, } @misc{30355, author = {{Schafmeister, Frank and Grote, Tobias }}, pages = {{24}}, title = {{{Digital Slope Compensation for Current Mode Control}}}, year = {{2012}}, } @inproceedings{30543, author = {{Cao, Z. and Nzeugang, F. H. and Tao, J. and Fröhleke, N. and Böcker, Joachim}}, booktitle = {{21th IEEE International Symposium on Industrial Electronics (ISIE2012), Huangzhou, China}}, title = {{{Novel dynamical modeling for series-parallel resonant converter}}}, doi = {{10.1109/ISIE.2012.6237122}}, year = {{2012}}, } @inproceedings{30540, author = {{Grote, T. and Bolte, S. and Fröhleke, N. and Böcker, Joachim}}, booktitle = {{PCIM Europe Conference, Nürnberg, Germany, 2012}}, title = {{{Reduction of Total Harmonic Distortion (THD)for Interleaved Converters Operating in Discontinuous Conduction Mode (DCM)}}}, year = {{2012}}, } @inproceedings{30544, author = {{Böcker, Joachim and Sun, M. and Cao, Z. and Tong, L. and Zou, H. and Ranjan, P.}}, booktitle = {{PCIM Europe Conference, Nürnberg, Germany}}, title = {{{High Fidelity Hybrid Hardware-in-the-Loop Simulator with FPGA and Processor for AC Railway Traction}}}, year = {{2012}}, } @inproceedings{30545, author = {{Tao, J. and Cao, Z. and Sun, M. and Fröhleke, N. and Böcker, Joachim}}, booktitle = {{PCIM Europe Conference, Nürnberg, Germany}}, title = {{{Full Digital Implementation of an Optimized Modulation Strategy for Series-Parallel Resonant Converter}}}, year = {{2012}}, } @inproceedings{30541, author = {{Buchholz, O. and Mathapati, S. and Böcker, Joachim}}, booktitle = {{PCIM Europe Conference, Nürnberg, Germany}}, title = {{{Boosting Dynamics of AC Machines by using FPGA-Based Controls}}}, year = {{2012}}, } @inbook{17617, abstract = {{Rezension: Zbl. Math. 1316.00023 (D. Bondoni)}}, author = {{Peckhaus, Volker}}, booktitle = {{Probabilities, Laws, and Structures}}, editor = {{Dieks, Dennis and a., u.}}, pages = {{419--429}}, publisher = {{Springer}}, title = {{{The Beginnings of Model Theory in the Algebra of Logic}}}, volume = {{3}}, year = {{2012}}, } @inbook{17621, author = {{Peckhaus, Volker}}, booktitle = {{The Square of Opposition. A General Framework of Cognition}}, editor = {{Béziau, Jean-Yves and Payette, Gillmann}}, pages = {{25--41}}, publisher = {{Peter Lang}}, title = {{{Algebra of Logic, Quantification Theory, and the Square of Opposition}}}, year = {{2012}}, } @inbook{17622, author = {{Peckhaus, Volker}}, booktitle = {{Mathematik – Logik – Philosophie. Ideen und ihre historischen Wechselwirkungen}}, editor = {{Löffladt, Günter}}, pages = {{297--304}}, publisher = {{Harri Deutsch}}, title = {{{Lambert und die blinde Erkenntnis}}}, year = {{2012}}, } @article{30554, author = {{Mathapati, Shashidhar and Böcker, Joachim}}, issn = {{0278-0046}}, journal = {{IEEE Transactions on Industrial Electronics}}, keywords = {{Electrical and Electronic Engineering, Control and Systems Engineering}}, number = {{3}}, pages = {{885--895}}, publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}}, title = {{{Analytical and Offline Approach to Select Optimal Hysteresis Bands of DTC for PMSM}}}, doi = {{10.1109/tie.2012.2189530}}, volume = {{60}}, year = {{2012}}, } @inbook{17623, abstract = {{Rezension: MR3642503 (V.V. Pambuccian); Zbl. Math. 1300.01020 (R.W. van der Waall)}}, author = {{Peckhaus, Volker}}, booktitle = {{New Essays on Leibniz Reception in Science and Philosophy of Science 1800–2000}}, editor = {{Krömer, Ralf and Chin-Drian, Yannick}}, pages = {{13--24}}, publisher = {{Birkhäuser}}, title = {{{The Reception of Leibniz’s Logic in 19th Century German Philosophy}}}, year = {{2012}}, } @inbook{17624, author = {{Peckhaus, Volker and Reuther, Thomas}}, booktitle = {{40 Jahre Universität Paderborn}}, editor = {{Freese, Peter}}, pages = {{100--116}}, title = {{{40 Jahre und kein bisschen leise … Eine kurze Geschichte der Paderborner Kulturwissenschaften}}}, year = {{2012}}, } @inproceedings{30538, author = {{Preckwinkel, Heiko and Krishna, DVMM and Fröhleke, Norbert and Böcker, Joachim}}, booktitle = {{IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society}}, publisher = {{IEEE}}, title = {{{Photovoltaic inverter with high efficiency over a wide operation area - a practical approach}}}, doi = {{10.1109/iecon.2011.6119432}}, year = {{2012}}, } @inproceedings{30550, author = {{Cao, Zhiyu and Tao, Junbing and Fröhleke, Norbert and Böcker, Joachim}}, booktitle = {{IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society}}, publisher = {{IEEE}}, title = {{{Time-domain steady-state modeling of series-parallel resonant converter under optimized modulation}}}, doi = {{10.1109/iecon.2012.6388646}}, year = {{2012}}, } @inproceedings{30531, author = {{Hu, Manli and Fröhleke, Norbert and Peters, Wilhelm and Böcker, Joachim}}, booktitle = {{IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society}}, publisher = {{IEEE}}, title = {{{Multi-objective optimization of LCC resonant converter applied in VLF HV generator}}}, doi = {{10.1109/iecon.2011.6119522}}, year = {{2012}}, } @inproceedings{30533, author = {{Cao, Zhiyu and Nzeugang, Franklin H. and Fröhleke, Norbert and Böcker, Joachim}}, booktitle = {{IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society}}, publisher = {{IEEE}}, title = {{{A comparative study of series-parallel resonant converter by using different modulation strategies}}}, doi = {{10.1109/iecon.2011.6119333}}, year = {{2012}}, } @inproceedings{30547, author = {{Solanki, Jitendra and Fröhleke, Norbert and Böcker, Joachim and Wallmeier, Peter}}, booktitle = {{2012 IEEE Energy Conversion Congress and Exposition (ECCE)}}, publisher = {{IEEE}}, title = {{{Analysis, design and control of 1MW, high power factor and high current rectifier system}}}, doi = {{10.1109/ecce.2012.6342604}}, year = {{2012}}, } @inproceedings{6056, author = {{Menke, Peter and Cimiano, Philipp}}, booktitle = {{Proceedings of the workshop "Describing Language Resources With Metadata" at Language Resources and Evaluation Conference (LREC) 2012}}, pages = {{49–54}}, title = {{{Towards an ontology of categories for multimodal annotation}}}, year = {{2012}}, } @inproceedings{22164, abstract = {{Generative production techniques have the advantage of manufacturing parts via an additive process without needing a forming tool. One of these additive manufacturing technologies is "Fused Deposition Modeling" (FDM). It is one of the most used additive manufacturing processes to produce prototypes and end-use parts. From a 3D-CAD data set, components and assemblies are manufactured out of thermoplastic material layer by layer by means of an additive process. An extrusion head deposits the molten thermoplastic filament to create each layer with a particular tool path. Due to the thermal fusion the material bonds with the layer beneath and solidifies. Thus a permanent bonding of two layers is formed. In this paper the mechanical data of parts, manufactured with the system Fortus 400mc from Stratasys with the material Ultem*9085 are presented. Tensile and flexural tests according to both, the ASTM and the ISO standard, are conducted. Test specimens are generated with the standard parameters of the native software in different build directions. The tests show different strength and strain characteristics that depend on the given structure as a result of the build direction. Furthermore tensile specimens according to the ASTM standard are generated with changed parameters of the native software to increase the mechanical strength properties. The results are compared to injection molded strength properties.}}, author = {{Bagsik, A. and Schöppner, Volker and Klemp, E.}}, booktitle = {{1st International Conference on Thermo-Mechanically Graded Materials}}, isbn = {{9783942267588}}, pages = {{129--134}}, title = {{{Tensile and Flexural Properties of Fused Deposition Modeling Parts Manufactured with ULTEM*9085}}}, volume = {{1}}, year = {{2012}}, } @inproceedings{22024, abstract = {{Generative production techniques have the advantage of manufacturing parts via an additive process without needing a forming tool. One of these additive manufacturing technologies is “Fused Deposition Modeling” (FDM). It is one of the most used additive manufacturing processes to produce prototypes and end-use parts. From a 3D-CAD data set, components and assemblies are manufactured out of thermoplastic material layer by layer by means of an additive process. An extrusion head deposits the molten thermoplastic filament to create each layer with a particular tool path. In this paper the mechanical data of parts, manufactured with the system Fortus 400mc from Stratasys with the material Ultem*9085 are presented. Tensile specimens are generated with the standard parameters as well as with changed parameters of the native software to analyze the influence of these parameters on the mechanical strength properties. The tensile tests show different strength and strain characteristics that depend on the given structure and as a result of the build direction. Furthermore the toolpath parameters have an effect on the strength characteristics and the break behavior. In addition, tensile specimens are tested under the influence of different temperatures and after a thermal cycling. }}, author = {{Bagsik, A. and Schöppner, Volker and Klemp, E.}}, booktitle = {{5th International Conference on Polymer and Mould Innovations}}, pages = {{266--272}}, publisher = {{Centre for Polymer and Material Technology, Univ. College, Ghent Univ.}}, title = {{{Extensive Analysis of the mechanical strength properties of Fused Deposition Modeling Parts manufactured with ULTEM 9085}}}, doi = {{https://www.tib.eu/de/suchen/id/TIBKAT%3A756276616}}, volume = {{5}}, year = {{2012}}, } @inbook{31795, author = {{Böker, Ines}}, booktitle = {{Die vergnügte Gesellschaft? Ernsthafte Perspektiven auf modernes Amüsement}}, editor = {{Heinlein, Michael and Seßler, Katharina }}, pages = {{265--274}}, publisher = {{transcript }}, title = {{{„Wenn dich die Freude frisst oder freust du dich – dann fress ich dich. Zur Lesbarkeit einer Spaßanthropophagie in der Kritik der Spaßgesellschaft“}}}, year = {{2012}}, } @article{31821, author = {{Blum, Mareike and Kraft, Manfred and Lück, Sonja}}, issn = {{1860-3025}}, journal = {{Hochschulmanagement}}, number = {{2}}, pages = {{34--41}}, title = {{{Zufriedenheit der Studierenden mit den Serviceeinrichtungen einer Universität: Ergebnisse einer explorativen multivariaten Analyse}}}, volume = {{7}}, year = {{2012}}, } @inbook{31832, author = {{Ballweg, Sandra}}, booktitle = {{Methoden empirischer Fremdsprachenforschung im Prozess – ein Blick hinter die Kulissen aktueller Forschungsprojekte (MatDaF 88)}}, editor = {{Cerri, Chiara and Jentges, Sabine and Stork, Antje}}, pages = {{21--35}}, publisher = {{Universitätsverlag}}, title = {{{Portfolioarbeit im fremdsprachlichen Schreibunterricht. Annäherung an das Forschungsfeld}}}, year = {{2012}}, } @inbook{31833, author = {{Ballweg, Sandra}}, booktitle = {{Multikompetent – multimedial – multikulturell? Aktuelle Tendenzen in der DaF-Lehrerausbildung}}, editor = {{Adamczak-Krysztofowicz, Sylwia and Stork, Antje}}, pages = {{147--158}}, publisher = {{Lang}}, title = {{{ePortfolios – Mediale Unterstützung in der DaF-/DaZ-Lehrerausbildung}}}, year = {{2012}}, } @article{31834, author = {{Ballweg, Sandra and Schmidtsdorf, Sven and Sommer, Janina}}, journal = {{Deutsch als Zweitsprache 1}}, pages = {{9--25}}, title = {{{DaZ im schulischen Schreib-Lese-Zentrum – Ansätze zur Förderung der schriftsprachlichen Kompetenzen von Schülerinnen und Schülern mit Migrationshintergrund}}}, year = {{2012}}, } @article{32112, author = {{Niederhaus, Constanze}}, journal = {{Praxis Deutsch. Zeitschrift für den Deutschunterricht (233)}}, pages = {{42--47}}, title = {{{Diagramme verstehen und schriftlich beschreiben}}}, year = {{2012}}, } @misc{18702, author = {{Peckhaus, Volker}}, booktitle = {{Zentralblatt für Mathematik und ihre Grenzgebiete}}, title = {{{Chareix, Fabien, “Geometrization or Mathematization. Christiaan Huygens’s Critiques of Infinitesimal Analysis in his Correspondence with Leibniz”, in: The Practice of Reason. Leibniz and his Controversies, hg. v. Marcelo Dascal, John Benjamins Publishing: Philadelphia 2010, 33–49}}}, year = {{2012}}, }