@article{19525, author = {{Höke, Julia and Bührmann, Thorsten and Büker, Petra and Hummel, Rebecca and Meser, Kapriel and Miller, Susanne and Stölner, Robert}}, journal = {{Zeitschrift für Grundschulforschung}}, pages = {{91--106}}, title = {{{Bildungshäuser als "Dritter Raum" im Übergang zwischen Kita und Grundschule - Kritische Blicke auf ein Jahrzehnt Intensivkooperation}}}, volume = {{H. 1}}, year = {{2017}}, } @phdthesis{19604, author = {{Li, Shouwei}}, title = {{{Parallel fixed parameter tractable problems}}}, doi = {{10.17619/UNIPB/1-252}}, year = {{2017}}, } @inproceedings{19759, author = {{Ditter, Jan and Wünsche, Marc and Meschut, Gerson and Wibbeke, Tim Michael}}, location = {{Shanghai}}, title = {{{Mechanical properties of repair welded joints for automobile body structures}}}, year = {{2017}}, } @article{19760, author = {{Meschut, Gerson and Ernstberger, Ludmila and Ditter, Jan}}, journal = {{Schweißen und Schneiden}}, number = {{9}}, title = {{{Anforderungsgerechte Analyse instationärer Zustände bei der Verarbeitung von Zweikomponentenklebstoff}}}, volume = {{69}}, year = {{2017}}, } @inproceedings{19779, abstract = {{Angegebener Monat: Dezember 2017}}, author = {{Büker, Petra}}, title = {{{Bildungshäuser als interinstitutionelle Bildungsräume für Kinder und pädagogische Fachkräfte. Wie können Kinder, Fachkräfte und die Übergangsgestaltung von Kooperationen in Bildungshäusern profitieren? Keynote an der Netzwerktagung "Qualität vor Ort", einer Gemeinschaftsaktion der Deutschen Kinder- und Jugendstiftung (DKJS), des Bundesministeriums für Familie, Senioren, Frauen und Jugend (BMFSFJ) und der Jacobs Foundation zur Stärkung frühkindlicher Bildung. Bildungshaus Hahle / Stade}}}, year = {{2017}}, } @inproceedings{19780, abstract = {{Februar und November 2017}}, author = {{Büker, Petra}}, title = {{{Inklusion vom Kind aus denken. Die neue Study-Edition für die Aus- und Weiterbildung von pädagogischen Fach- und Lehrkräften. Öffentliche Workshoptagung für Akteure aus Wissenschaft und Praxis. Universität Paderborn}}}, year = {{2017}}, } @inproceedings{19781, abstract = {{September 2017}}, author = {{Büker, Petra}}, title = {{{Partizipation von Kindergarten- und Grundschulkindern an Übergangsgestaltung, Übergangsforschung und am Transfer in optimierte Praxis. Erfahrungen aus einer Kinderbefragungsstudie im Rahmen des Modellprojekts "buddY". Beitrag im Rahmen des Symposiums: Perspektiven des Transfers von Forschungsbefunden im Übergang Kindergarten - Grundschule an der 26. Jahrestagung der Kommission Grundschulforschung und Pädagogik der Primarstufe an der Universität Landau}}}, year = {{2017}}, } @inproceedings{19783, abstract = {{August 2017}}, author = {{Büker, Petra and Hüpping, Birgit}}, title = {{{Immigrant Children as ‘Experts’ of their Culture?! Addressing cultural diversity in kindergarten and primary education: children’s and teacher’s perspectives. Symposiumsbeitrag im Rahmen der 27 th EECERA conference - European Early Childhood Research Association. Universität Bologna, Italien}}}, year = {{2017}}, } @inproceedings{19786, abstract = {{Juli 2017}}, author = {{Büker, Petra}}, title = {{{Kinder stärken für das Aufwachsen in pluralen Lebenswelten. Keynote an der Schulanfangstagung des Instituts für Qualitätsentwicklung an Schulen Schleswig Holsteins (IQSH): Von Anfang an: Kinder stärken – Vielfältigkeit leben. Kiel}}}, year = {{2017}}, } @inproceedings{19787, abstract = {{In Kooperation mit dem Bildungsbüro Kind und Ko Paderborn sowie dem Jugendamt der Stadt Detmold. Juni 2017}}, author = {{Büker, Petra}}, title = {{{Kita und Grundschule auf dem Weg zur Partnerschaft: Was macht die Qualität der Kooperation aus? Einführungsvortrag im Rahmen der Auftaktveranstaltung zur Eröffnung des Weiterbildungsprogramms für pädagogische Fach- und Lehrkräfte zur Qualitätsentwicklung im Übergang mit dem Paderborner Qualitätsstern. In Kooperation mit dem Bildungsbüro Kind und Ko Paderborn sowie dem Jugendamt der Stadt Detmold}}}, year = {{2017}}, } @inproceedings{19788, abstract = {{März 2017}}, author = {{Büker, Petra}}, title = {{{Forschen – Irritieren – Reflektieren: Das Paderborner Zentrum für KinderBildungsForschung (KiBi-Z) unterstützt Studierende beim Lernen in der Praxis. Symposiumsbeitrag im Rahmen des 2. Internationalen Kongresses "Lernen in der Praxis - Professionalisierungsprozesse im Kontext schulpraktischer Studien in der Lehrerbildung" an der Ruhr-Universität Bochum}}}, year = {{2017}}, } @inproceedings{20134, author = {{Meyer, Sebastian and Meschut, Gerson and Behrens, Bernd-Arno and Hübner, Sven and Neumann, Andre}}, title = {{{Einbringen von Funktionselementen bei der Warmumformung von 22MnB5}}}, year = {{2017}}, } @article{20288, author = {{Folgar, Ribadas H. and Böddeker, T. and Chergui, A. and Ivanjko, Martin and Gili, F. and Behrens, S.}}, journal = {{Procedia Structural Integrity}}, pages = {{516--523}}, title = {{{Joining TWIP-Steel Simulation Models}}}, year = {{2017}}, } @inproceedings{20291, author = {{Böddeker, Tobias and Ivanjko, Martin and Chergui, Azeddine and Gili, Flavia and Behrens, Sabine and Runkel, Dirk and Mašek, Martin}}, booktitle = {{7. Fügetechnisches Gemeinschaftskolloquium}}, title = {{{JoiningTWIP – TWIP-steels for multi material design in automotive industry using low heat joining technologies II}}}, year = {{2017}}, } @inproceedings{20296, author = {{Günter, Heinrich and Janzen, Vitalij and Meschut, Gerson}}, booktitle = {{Tagungsband zum 7. Fügetechnischen Gemeinschaftskolloquium}}, location = {{Dresden}}, title = {{{Vorlochfreies Fügen stahlintensiver Leichtbaustrukturen durch vorkonfektioniertes und selbststanzendes Widerstandselementschweißen}}}, year = {{2017}}, } @techreport{2801, author = {{Kundisch, Dennis}}, pages = {{182--183}}, title = {{{Developing and Using an Audience Response System}}}, volume = {{60 (2)}}, year = {{2017}}, } @inproceedings{28022, author = {{Bloh, Bea and van Ophuysen, Stefanie and Behrmann, Lars and Homt, Martina and Schürer, Sina}}, location = {{Münster}}, title = {{{„Ich kann das Forschungsgedöns ja doch gebrauchen!“ – Zur Konzeption und Evaluation der Lehrveranstaltungen im Praxissemester an der WWU Münster}}}, year = {{2017}}, } @misc{28231, author = {{Bodden, Eric and Dressler, Falko and Meyer auf der Heide, Friedhelm and Scheytt, Christoph and Trächtler, Ansgar}}, isbn = {{978-3-942647-88-5}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Intelligente technische Systeme}}}, volume = {{369}}, year = {{2017}}, } @phdthesis{28232, author = {{Kühn, Arnon Theodor}}, isbn = {{978-3-942647-89-2}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Systematik zur Release-Planung intelligenter technischer Systeme}}}, volume = {{370}}, year = {{2017}}, } @article{28345, author = {{Grimminger-Seidensticker, Elke and Möhwald, Aiko Julia}}, issn = {{1740-8989}}, journal = {{Physical Education and Sport Pedagogy}}, number = {{5}}, pages = {{445--458}}, title = {{{Intercultural education in physical education: results of a quasi-experimental intervention study with secondary school students}}}, doi = {{10.1080/17408989.2016.1225030}}, volume = {{22}}, year = {{2017}}, } @article{28348, abstract = {{This article explores the interplay between learners’ linguistic and personal objectives as well as evaluations of their achievements in study-abroad contexts, an area that has thus far remained widely unexplored given the prevalence of product-oriented, outcomes-based research. The study draws on the case of one Canadian student of German who studied abroad at a German university for one year. To adopt an emic perspective, the data gained from a learning history questionnaire, semi-structured interviews, and e-journals were analyzed and interpreted within the framework of narrative analysis. The results show not only that learners’ sojourn objectives may be complex, dynamic, and contradictory in nature but also that they need to be examined beyond their face value, as they are entangled with learners’ negotiations of desirable subject positions and attempts to integrate their sojourn experiences, successes, and frustrations in a coherent and positive life narrative.}}, author = {{Müller, Mareike}}, issn = {{0008-4506}}, journal = {{The Canadian Modern Language Review}}, keywords = {{individual differences, learner beliefs, narrative analysis, sojourn objectives and evaluations, study abroad}}, number = {{1}}, pages = {{24--47}}, title = {{{“As a person, I feel I’ve changed pretty immensely”: Sojourners’ aspirations and self-perceived achievements}}}, doi = {{10.3138/cmlr.3319}}, volume = {{73}}, year = {{2017}}, } @article{28354, abstract = {{This paper discusses the findings of an empirical study that explores the relationship between study-abroad experiences, learner identity, and pronunciation. We argue that the role of pronunciation as a personal domain of meaning-making warrants more attention than it has hitherto received. To this end, we investigate the narratives of Canadian learners, studying abroad in Germany, in relation to discourses of language learning, culture, and identity, using a Critical Discourse Analysis approach. Our data, which we gained from semi-structured interviews and e-journals, shows that learners’ perceptions of pronunciation are closely linked to their views of the native-speaker ideal, impacting their self-constructions and interpretations of learning experience. In conclusion, we argue for a more differentiated understanding of pronunciation and its implications for language teaching and study abroad.}}, author = {{Müller, Mareike and Schmenk, Barbara}}, issn = {{0802-6106}}, journal = {{International Journal of Applied Linguistics}}, keywords = {{learner identity, study abroad, pronunciation, native-speaker ideal, critical discourse analysis}}, number = {{1}}, pages = {{132--151}}, title = {{{Narrating the sound of self: The role of pronunciation in learners’ self-constructions in study-abroad contexts}}}, doi = {{10.1111/ijal.12109}}, volume = {{27}}, year = {{2017}}, } @misc{28359, author = {{Gausemeier, Jürgen}}, isbn = {{978-3-942647-93-9}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Vorausschau und Technologieplanung. 13. Symposium für Vorausschau und Technologieplanung, Heinz Nixdorf Institut, 23. und 24. November 2017}}}, volume = {{374}}, year = {{2017}}, } @inbook{28420, author = {{Homt, Martina and van Ophuysen, Stefanie}}, booktitle = {{Schulpraktische Lehrerprofessionalisierung als Ort der Zusammenarbeit}}, editor = {{Pilypaityte, Lina and Siller, Hans-Stefan}}, pages = {{255--260}}, publisher = {{Springer VS}}, title = {{{Gelingensbedingungen für den Aufbau einer forschenden Grundhaltung im Praxissemester – eine qualitative vergleichende Fallstudie}}}, doi = {{10.1007/978-3-658-17086-8_19}}, year = {{2017}}, } @inproceedings{28430, author = {{Homt, Martina and van Ophuysen, Stefanie}}, title = {{{Forschendes Lernen im Praxissemester – Der universitäre und schulische Kontext}}}, year = {{2017}}, } @inproceedings{28431, author = {{Homt, Martina}}, title = {{{Gelingensbedingungen für den Aufbau einer forschenden Grundhaltung im Praxissemester – eine qualitative vergleichende Fallstudie}}}, year = {{2017}}, } @inproceedings{2851, author = {{Markarian, Christine}}, booktitle = {{International Conference on Operations Research (OR)}}, location = {{Berlin}}, title = {{{Leasing with Uncertainty}}}, doi = {{10.1007/978-3-319-89920-6_57}}, year = {{2017}}, } @article{2856, abstract = {{Taxi ridesharing1 (TRS) is an advanced form of urban transportation that matches separate ride requests with similar spatio-temporal characteristics to a jointly used taxi. As collaborative consumption, TRS saves customers money, enables taxi companies to economize use of their resources, and lowers greenhouse gas emissions. We develop a one-to-one TRS approach that matches rides with similar start and end points. We evaluate our approach by analyzing an open dataset of > 5 million taxi trajectories in New York City. Our empirical analysis reveals that the proposed approach matches up to 48.34% of all taxi rides, saving 2,892,036 km of travel distance, 231,362.89 l of gas, and 532,134.64 kg of CO2 emissions per week. Compared to many-to-many TRS approaches, our approach is competitive, simpler to implement and operate, and poses less rigid assumptions on data availability and customer acceptance.}}, author = {{Barann, Benjamin and Beverungen, Daniel and Müller, Oliver}}, journal = {{Decision Support Systems}}, keywords = {{Taxi ridesharing Collaborative consumption Transportation Open data Sustainability Shared mobility}}, pages = {{86----95}}, title = {{{An open-data approach for quantifying the potential of taxi ridesharing}}}, doi = {{10.1016/j.dss.2017.05.008}}, year = {{2017}}, } @inproceedings{2860, abstract = {{Although many methods have been proposed for engineering services and customer solutions, most of these approaches give little consideration to recombinant service innovation. In an age of smart products and smart data, we can, however, expect that many of future service innovations need to be based on adding, transferring, dissociating, and associating existing value propositions. The purpose of this paper is to outline what properties constitute recombinant service innovation and to identify if current service engineering approaches fulfill these properties. Based on a conceptual in-depth analysis of 24 service engineering methods, we identify that most methods focus on designing value propositions instead of service systems, view service independent of physical goods, are linear or iterative, and incompletely address the mechanisms of recombinant innovation. We discuss how these deficiencies can be remedied and propose a first conceptual model of a revised se rvice system engineering approach.}}, author = {{Beverungen, Daniel and Lüttenberg, Hedda and Wolf, Verena}}, booktitle = {{Proceedings der 13. Internationalen Tagung Wirtschaftsinformatik (WI 2017)}}, editor = {{Leimeister, Jan Marco and Brenner, Walter}}, keywords = {{Service engineering, recombinant innovation, (product - )service system, literature analysis, new service development}}, location = {{St. Gallen, Switzerland}}, pages = {{136--150}}, title = {{{Recombinant Service System Engineering}}}, year = {{2017}}, } @article{28624, author = {{Eickelmann, Birgit and Drossel, Kerstin}}, journal = {{Dreizehn – Zeitschrift für Jugendsozialarbeit}}, pages = {{24--29}}, title = {{{Digitale Bildung – eine neue Perspektive auf Bildungsgerechtigkeit?}}}, volume = {{18}}, year = {{2017}}, } @inbook{28626, author = {{Gerick, Julia and Eickelmann, Birgit and Bos, Wilfried}}, booktitle = {{Individualisierung im Grundschulunterricht: Anspruch, Realisierung und Risiken }}, editor = {{Heinzel, Friederike and Koch, Katja}}, pages = {{131--136}}, publisher = {{Springer}}, title = {{{Zum Stellenwert neuer Technologien für die individuelle Förderung im Deutschunterricht in der Grundschule}}}, volume = {{21}}, year = {{2017}}, } @article{28627, author = {{Eickelmann, Birgit}}, journal = {{Tertium Comparationis. Journal für International und Interkulturell Vergleichende Erziehungswissenschaft}}, number = {{1}}, pages = {{47--61}}, title = {{{Computational Thinking als internationales Zusatzmodul zu ICILS 2018 – Konzeptionierung und Perspektiven für die empirische Bildungsforschung}}}, volume = {{23}}, year = {{2017}}, } @article{28628, author = {{Eickelmann, Birgit}}, journal = {{Neue Deutsche Schule. Die Zeitschrift der Bildungsgewerkschaft}}, number = {{14}}, title = {{{Digitalisierung. Neue Herausforderungen für Schulen und Schulaufsicht}}}, volume = {{9}}, year = {{2017}}, } @article{28629, author = {{Eickelmann, Birgit}}, journal = {{Zeitschrift Schul-Management}}, number = {{5}}, pages = {{15--19}}, title = {{{Digitale Kompetenzen im internationalen Vergleich. Welche Impulse geben die Studien ICILS 2013 und ICILS 2018?}}}, volume = {{48}}, year = {{2017}}, } @article{28630, author = {{Eickelmann, Birgit}}, journal = {{Basisartikel im Heft 'Digitalisierung in der Schule'. Lernende Schule}}, number = {{79}}, pages = {{4--9}}, title = {{{Lernende Schulen in der digitalen Welt – Herausforderungen und Perspektiven}}}, volume = {{20}}, year = {{2017}}, } @book{28631, author = {{Eickelmann, Birgit}}, publisher = {{Friedrich-Ebert-Stiftung}}, title = {{{Kompetenzen in der digitalen Welt. Konzepte und Perspektiven}}}, year = {{2017}}, } @inbook{28633, author = {{Eickelmann, Birgit and Gerick, Julia}}, booktitle = {{Lehren und Lernen mit digitalen Medien. Strategien, internationale Trends und pädagogische Orientierungen}}, editor = {{Scheiter, Katharina and Riecke-Baulecke, Thomas}}, pages = {{54--81}}, publisher = {{Oldenbourg}}, title = {{{Lehren und Lernen mit digitalen Medien - Zielsetzungen, Rahmenbedingungen und Implikationen für die Schulentwicklung}}}, volume = {{4}}, year = {{2017}}, } @inbook{28650, author = {{Eickelmann, Birgit}}, booktitle = {{Bildung im Digitalen Zeitalter - Bilanz und Perspektiven}}, editor = {{Nixdorf MuseumsForum, Heinz}}, pages = {{24--45}}, publisher = {{HNF}}, title = {{{Computer Literacy im schulischen Kontext – eine internationale Perspektive}}}, year = {{2017}}, } @article{28651, author = {{Eickelmann, Birgit and Drossel, Kerstin}}, journal = {{Medienimpulse}}, title = {{{Computer- und informationsbezogene Kompetenzen in der IEA-Studie ICILS 2013 und der Zusammenhang mit der Lesekompetenz}}}, doi = {{10.21243/mi-04-17-08}}, volume = {{4}}, year = {{2017}}, } @misc{28652, author = {{Gerick, Julia and Eickelmann, Birgit}}, publisher = {{Universität Hamburg/Universität Paderborn}}, title = {{{Abschlussbericht im Rahmen der wissenschaftlichen Begleitung der Evaluation des Projekts „Lernen mit digitalen Medien“ in Schleswig-Holstein}}}, year = {{2017}}, } @article{28653, author = {{Gerick, Julia and Eickelmann, Birgit and Rolff, Hans-Günter}}, journal = {{Journal für Schulentwicklung}}, number = {{3}}, pages = {{5--7}}, title = {{{Digitale Medien in Schule und Unterricht – Herausforderungen für die Schulentwicklung}}}, volume = {{21}}, year = {{2017}}, } @article{28655, author = {{Gerick, Julia and Eickelmann, Birgit and Ramm, Gesa and Kühn, Thore-Olaf}}, journal = {{Journal für Schulentwicklung}}, number = {{3}}, pages = {{8--14}}, title = {{{Gelingensbedingungen für den Transfer schulischer Innovationen mit digitalen Medien. Ergebnisse aus einem Modellprojekt}}}, volume = {{21}}, year = {{2017}}, } @article{28656, author = {{Eickelmann, Birgit}}, journal = {{Journal für Schulentwicklung}}, number = {{3}}, pages = {{49--52}}, title = {{{Schulische Medienkonzepte als Instrument der Schulentwicklung}}}, volume = {{21}}, year = {{2017}}, } @misc{28658, booktitle = {{Journal für Schulentwicklung}}, editor = {{Gerick, Julia and Eickelmann, Birgit and Kühn, Thore-Olaf}}, title = {{{Digitale Medien in Schule und Unterricht. Herausforderungen für die Schulentwicklung [Themenheft]}}}, year = {{2017}}, } @inbook{28659, author = {{Eickelmann, Birgit and Lorenz, Ramona and Endberg, Manuela}}, booktitle = {{Schule digital – der Länderindikator 2017. Schulische Medienbildung in der Sekundarstufe I mit besonderem Fokus auf MINT-Fächer im Bundesländervergleich und Trends von 2015 bis 2017}}, editor = {{Lorenz, Ramona and Bos, Wilfried and Endberg, Manuela and Eickelmann, Birgit and Grafe, Silke and Vahrenhold, Jan}}, pages = {{231--260}}, publisher = {{Waxmann}}, title = {{{Lernaktivitäten mit digitalen Medien im Fachunterricht der Sekundarstufe I im Bundesländervergleich mit besonderem Fokus auf MINT-Fächer}}}, year = {{2017}}, } @inbook{28663, author = {{Lorenz, Ramona and Endberg, Manuela and Eickelmann, Birgit}}, booktitle = {{Schule digital – der Länderindikator 2017. Schulische Medienbildung in der Sekundarstufe I mit besonderem Fokus auf MINT-Fächer im Bundesländervergleich und Trends von 2015 bis 2017}}, editor = {{Lorenz, Ramona and Bos, Wilfried and Endberg, Manuela and Eickelmann, Birgit and Grafe, Silke and Vahrenhold, Jan}}, pages = {{84--121}}, publisher = {{Waxmann}}, title = {{{Unterrichtliche Nutzung digitaler Medien durch Lehrpersonen in der Sekundarstufe I im Bundesländervergleich und im Trend von 2015 bis 2017}}}, year = {{2017}}, } @book{28665, editor = {{Lorenz, Ramona and Bos, Wilfried and Endberg, Manuela and Eickelmann, Birgit and Grafe, Silke and Vahrenhold, Jan}}, publisher = {{Waxmann}}, title = {{{Schule digital – der Länderindikator 2017. Schulische Medienbildung in der Sekundarstufe I mit besonderem Fokus auf MINT-Fächer im Bundesländervergleich und Trends von 2015 bis 2017}}}, year = {{2017}}, } @article{28669, author = {{Gerick, Julia and Eickelmann, Birgit and Bos, Wilfried}}, issn = {{2196-0739}}, journal = {{Large-scale Assessments in Education}}, number = {{1}}, pages = {{1--13}}, title = {{{School-level predictors for the use of ICT in schools and students’ CIL in international comparison}}}, doi = {{10.1186/s40536-017-0037-7}}, volume = {{5}}, year = {{2017}}, } @article{28670, author = {{Drossel, Kerstin and Eickelmann, Birgit and Gerick, Julia}}, issn = {{1360-2357}}, journal = {{Education and Information Technologies}}, number = {{2}}, pages = {{551--573}}, title = {{{Predictors of teachers’ use of ICT in school – the relevance of school characteristics, teachers’ attitudes and teacher collaboration}}}, doi = {{10.1007/s10639-016-9476-y}}, volume = {{22}}, year = {{2017}}, } @article{28671, author = {{Eickelmann, Birgit and Gerick, Julia and Koop, Christian}}, issn = {{1360-2357}}, journal = {{Education and Information Technologies}}, number = {{4}}, pages = {{1527--1551}}, title = {{{ICT use in mathematics lessons and the mathematics achievement of secondary school students by international comparison: Which role do school level factors play?}}}, doi = {{10.1007/s10639-016-9498-5}}, volume = {{22}}, year = {{2017}}, } @article{28672, abstract = {{ In the debate on the integration of information and communication technologies (ICT) into schools, the beliefs and attitudes of teachers towards ICT in teaching and learning have always been regarded as central criteria for successful implementation of new technologies. In this context, a study in 2013 by the International Association for the Evaluation of Educational Achievement, IEA, provided insights into teachers’ beliefs regarding ICT and showed that perceptions of the pedagogical advantages of technologies differ between countries. With regard to this finding, this paper seeks to determine whether there is a typology of teachers with different attitudes towards the potential of ICTs for learning. This question is addressed by conducting latent class analyses on a sample of teacher data from three European countries – the Czech Republic, Germany and Norway. Furthermore, the paper investigates how the use of computers by teachers varies between the groups to which these teachers can be assigned. In doing so the research reported at hand connects, arguably for the first time, representative data on teacher typologies of attitudes towards and beliefs about ICT in teaching and learning with data on computer use in schools. }}, author = {{Eickelmann, Birgit and Vennemann, Mario}}, issn = {{1474-9041}}, journal = {{European Educational Research Journal}}, number = {{6}}, pages = {{733--761}}, title = {{{Teachers‘ attitudes and beliefs regarding ICT in teaching and learning in European countries}}}, doi = {{10.1177/1474904117725899}}, volume = {{16}}, year = {{2017}}, } @article{28673, abstract = {{ The International Computer and Information Literacy Study (ICILS 2013) provides, for the first time, information about students’ computer and information literacy (CIL), as well as its acquisition, based on a computer-based test for students and background questionnaires. Among the 21 education systems that participated in ICILS 2013, there are 12 European countries, making secondary comparative in-depth analyses at a European level particularly fruitful. Accordingly, while the four articles in this Special Issue each deal with different topics and adopt different methodologies, they all share a common element and provide European comparisons in the ICILS context. The editorial in turn outlines the aim of the ICILS 2013 study and its relevance for European education research as well as its contextual framework and approach to the measurement of students’ CIL. The potential and challenges of such large-scale assessment studies are also discussed. }}, author = {{Gerick, Julia and Eickelmann, Birgit and Bos, Wilfried}}, issn = {{1474-9041}}, journal = {{European Educational Research Journal}}, number = {{6}}, pages = {{707--715}}, title = {{{The international computer and information literacy study from a European perspective: Introduction to the Special Issue}}}, doi = {{10.1177/1474904117735417}}, volume = {{16}}, year = {{2017}}, } @inbook{28675, author = {{Drossel, Kerstin and Eickelmann, Birgit}}, booktitle = {{Tomorrow's learning: involving everyone. Learning with and about technologies and computing }}, editor = {{Tatnall, Arthur and Webb, Mary}}, issn = {{1868-4238}}, pages = {{114--124}}, publisher = {{Springer International Publishing}}, title = {{{The Use of Tablets in Secondary Schools and Its Relationship with Computer Literacy}}}, doi = {{10.1007/978-3-319-74310-3_14}}, year = {{2017}}, } @inbook{28676, author = {{Eickelmann, Birgit}}, booktitle = {{Medienkompetenz. Herausforderung für Politik, politische Bildung und Medienbildung}}, editor = {{Gapski, Harald and Oberle, Monika and Staufer, Walter}}, pages = {{146--154}}, publisher = {{Bundeszentrale für Politische Bildung}}, title = {{{Schulische Medienkompetenzförderung}}}, year = {{2017}}, } @article{24109, author = {{Wiesener, Markus and Peters, K. and Taube, Alexander and Keller, Adrian and Hoyer, Kay-Peter and Niendorf, Thomas and Grundmeier, Guido}}, issn = {{0947-5117}}, journal = {{Materials and Corrosion}}, pages = {{1028--1036}}, title = {{{Corrosion properties of bioresorbable FeMn-Ag alloys prepared by selective laser melting}}}, doi = {{10.1002/maco.201709478}}, year = {{2017}}, } @inbook{24117, author = {{Taube, Alexander and Reschetnik, Wadim and Pauli, Lorenz and Hoyer, Kay-Peter and Kullmer, Gunter and Schaper, Mirko}}, booktitle = {{Additive Fertigung von Bauteilen und Strukturen}}, isbn = {{978-3-658-17779-9}}, publisher = {{Springer Vieweg}}, title = {{{Numerische und mechanische Untersuchung additiv gefertigter TiAl6V4 Gitterstrukturen}}}, doi = {{10.1007/978-3-658-17780-5_13}}, year = {{2017}}, } @inproceedings{24119, author = {{Brüggemann, Jan-Peter and Reschetnik, Wadim and Kullmer, Gunter and Richard, Hans Albert and Aydinöz, Mehmet Esat and Hoyer, Kay-Peter and Schaper, Mirko}}, booktitle = {{DVM - Tagung - Bruchmechanische Werkstoff- Und Bauteilbewertung: Beanspruchungsanalyse, Prüfmethoden und Anwendungen}}, pages = {{11--22}}, title = {{{Optimierung der Werkstoffeigenschaften von selektiv lasergeschmolzenem Alumi-nium 7075, }}}, year = {{2017}}, } @article{24152, author = {{Ramaswamy, Arunselvan and Bhatnagar, Shalabh}}, journal = {{IEEE Transactions on Automatic Control}}, number = {{5}}, pages = {{1465--1471}}, publisher = {{IEEE}}, title = {{{Analysis of gradient descent methods with nondiminishing bounded errors}}}, volume = {{63}}, year = {{2017}}, } @article{24153, author = {{Ramaswamy, Arunselvan and Bhatnagar, Shalabh}}, journal = {{Mathematics of Operations Research}}, number = {{3}}, pages = {{648--661}}, publisher = {{INFORMS}}, title = {{{A generalization of the Borkar-Meyn theorem for stochastic recursive inclusions}}}, volume = {{42}}, year = {{2017}}, } @inproceedings{24215, abstract = {{Wireless Sensor Networks (WSN) consist of large number of distributed sensors nodes which are able to sense, read and transmit physical measurements such as temperature, humidity and pressure over wireless communication links. WSN nodes are often powered by batteries or can use energy harvesting methods from environmental energy sources. One of the major challenges in the design of WSN nodes is the high level of power dissipation for sensing, processing and communication. Operating at low-power levels reduces maintenance effort for periodic battery replacement or can even provide unlimited operation by means of energy harvesting. Since the communication process is the most power hungry process, ultra-low-power wireless communication is an enabler for network applications such as cyber-physical systems, Internet-of-Things and Industry 4.0 etc. Our research is based on Wake-up Receivers (WuR) architectures. Each of the WSN nodes contains a WuR which is always-on, listening for a wake-up signal from other nodes or the base station, and activating the node only when a wake-up signal is detected. By this scheme the communication with the base station becomes asynchronous, real-time and on-demand. Due to the centrally-coordinated, collision-free communication such WSNs can be scaled to very large node numbers. Designing always-on WuR at ultra-low-power dissipation levels makes the WSN nodes very energy efficient because they are only activated when a wake-up-signal is received. Additionally, the WuR must be robust to noise and co-channel interference in order to operate safely in parallel to other wireless systems. We investigate a novel radio architecture for the WuR using Linear Frequency Modulation (LFM) and passive analog signal processing by means of a Surface Acoustic Wave (SAW) correlator. The base station sends the required WSN node ID using LFM signal at 2.4 GHz. The node ID is encoded as chirp up or chirp down signal with chirping bandwidth of 80MHz. On the receiver side, the SAW chirp correlator demodulates the received LFM signal while suppressing other wireless signals. In order to achieve proper demodulation and high Signal-to-Noise Ratio (SNR), the SAW correlator is designed to behave like a Matched Filter (MF) which boosts up the SNR. After that the signal is amplified/detected by baseband amplifier stage, it is compared with the unique ID of the node, and the node's Wake up signal is asserted accordingly. Since the SAW correlator operates completely passive, the WuR can be implemented in a very energy-efficient way, without the need to use power hungry device such as Low Noise Amplifiers (LNA) or down conversion Local Oscillators (LO)}}, author = {{Abughannam, Saed and Scheytt, Christoph}}, booktitle = {{Kleinheubacher Tagung 2017}}, pages = {{47}}, title = {{{ Low-Power wake up receiver based on Surface Acoustic Wave Correlator}}}, year = {{2017}}, } @article{24216, abstract = {{In this article mixed analog/digital signal processing techniques based on parallel spread-spectrum sequencing (PSSS) and radio frequency (RF) carrier synchronization for ultra-broadband wireless communication are investigated on system and circuit level.}}, author = {{Scheytt, Christoph and Javed, Abdul Rehman and Bammidi, Eswara Rao and KrishneGowda, Karthik and Kallfass, Ingmar and Kraemer, Rolf}}, journal = {{Frequenz* Journal of RF-Engineering and Telecommunications}}, number = {{9-10}}, pages = {{399--414}}, title = {{{100 Gbps Wireless System and Circuit Design Using Parallel Spread-Spectrum Sequencing}}}, volume = {{71 }}, year = {{2017}}, } @inproceedings{24217, abstract = {{Parallel Sequence Spread Spectrum (PSSS) is a physical layer (PHY) baseband technology that is well suited for mixed-signal transceiver implementation for high data rate wireless communication systems. Mixed signal baseband realization allows for easier implementation of the channel equalization function and eliminates the need for high speed data converters. System design and architecture of a mixed signal baseband processor for 100 Gbps wireless communication is described that reduces the implementation complexity and results in a consequent reduction in power dissipation and chip area. An ultra-broadband analog correlator consisting of a four-quadrant multiplier and a fast resettable integrator using only NPN transistors was designed, fabricated, and measured. The correlator circuit is the core component of the receiver baseband. To the best knowledge of the authors, it is the fastest correlator circuit published so far.}}, author = {{Javed, Abdul Rehman and Scheytt, Christoph and Karthik, KrishneGowda and Kramer, Roland}}, booktitle = {{IEEE EUROCON 2017-17th International Conference on Smart Technologies}}, isbn = {{978-1-5090-3844-2}}, pages = {{228--233}}, title = {{{System design of a mixed signal PSSS transdeiver using a linear ultra-broadband analog correlator for the receiver baseband designed in 130nm SiGe BiCMOS technology}}}, doi = {{10.1109/EUROCON.2017.8011110}}, year = {{2017}}, } @misc{24218, abstract = {{ Die Erfindung betrifft eine Folge-Halte-Schaltung zum Konvertieren eines analogen Eingangssignals in ein digitales Ausgangssignal mit einer Haltekapazitätseinheit, mit einer Spannungsverstärkereinheit enthaltend einen Eingang, an dem ein analoges Eingangsspannungssignal anlegbar ist, und enthaltend einen Ausgang, der mit der Haltekapazitätseinheit verbunden ist, mit einer Arbeitspunkteinstelleinheit zur Steuerung der Spannungsverstärkereinheit, wobei an einem Eingang der Arbeitspunkteinstelleinheit ein Steuersignal anliegt, so dass in einem Folgebetrieb der Folge-Halte-Schaltung eine an dem Ausgang der Spannungsverstärkereinheit anliegendes Ausgangssignal einen an den Eingang der Spannungsverstärkereinheit anliegendes Eingangssignal folgt, und in einem Haltebetrieb der Folge-Halte-Schaltung das Ausgangssignal der Spannungsverstärkereinheit konstant ist, mit einer Taktsignalquelle zur Erzeugung einer Folge von einem Eingang der Arbeitspunkteinstelleinheit anliegenden Taktsignalen, wobei die Arbeitspunkteinstelleinheit elektrooptische Mittel zur Erzeugung des Steuersignals aufweist, dass die Taktsignalquelle als eine optische Taktsignalquelle ausgebildet ist, so dass als Taktsignal eine optische Impulsfolge mit hohen und tiefen Taktsignalen an den Eingang der Arbeitspunkteinstelleinheit anliegt. }}, author = {{Scheytt, Christoph}}, title = {{{Folge-Halte-Schaltung }}}, year = {{2017}}, } @inproceedings{24219, abstract = {{In this paper we present theoretical, simulated and measured data for a reader to tag communication RFID system at 5.8 GHz. First a theoretical link budget analysis for a reader to tag architecture is shown for a wireless industrial application at 1m distance. This includes a power budget of the passively powered transponder. The received power level of the backscattered data for the theoretical link budget is -52:5 dBm. For the first setup slot antennas are developed and measured in the anechoic chamber. The measured gain is 4.0 dB. The power of the backscatter data in setup 1 is -74:8 dBm. This corresponds to the theoretical link budget since, all losses such as cable or lower antenna gain are taken into account. Setup 2 is upgraded on the reader side with horn antennas. At 5.8 GHz, the gain reaches the value of 10.8 dB. The second setup shows improvement in the receiving backscattered power to a value of -62:4 dBm. Furthermore, as a solution to detect those transponders not presented in the main slope of the antenna, a steerable beam is introduced by means of a Rotman lens. On the topic of the passive transponder, different harvesting topologies at 5.8 GHz are investigated, and the efficiency simulation of the harvesting circuitry has been performed. The simulated efficiency of the implemented technique is 68 %.}}, author = {{Kuhn, Peter and Haddadian, Sanaz and Meyer, Frederic and Hoffmann, Marc and Grabmaier, Anton and Scheytt, Christoph and Kaiser, Thomas}}, booktitle = {{Smart SysTech 2017; European Conference on Smart Objects, Systems and Technologies}}, isbn = {{978-3-8007-4428-2}}, publisher = {{VDE ITG}}, title = {{{SHF RFID System for Automatic Process Optimization with Intelligent Tools}}}, year = {{2017}}, } @inproceedings{24220, author = {{Adelt, Peer and Koppelmann, Bastian and Müller, Wolfgang and Mueller-Gritschneder, Daniel and Kleinjohann, Bernd and Scheytt, Christoph}}, booktitle = {{Tagungsband des Wissenschaftsforums Intelligente Technische Systeme}}, isbn = {{978-3-942647-88-5}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts}}, title = {{{Automatisierte Fehlerinjektion zur Entwicklung sicherer Mikrocontrolleranwendungen auf der Basis virtueller Plattformen}}}, doi = {{10.17619/UNIPB/1-93}}, year = {{2017}}, } @book{24221, abstract = {{Das Wissenschaftsforum Intelligente Technische Systeme (WInTeSys) legt am 11. und 12. Mai 2017 in Paderborn den Schwerpunkt auf die Grundlagen und die Entwicklung intelligenter technischer Systeme im Kontext Industrie 4.0. Etwa 40 begutachtete hochkarätige Beiträge geben einen Überblick über Forschungsfelder, Technologien und Anwendungen. Die Veranstaltung bietet den Teilnehmerinnen und Teilnehmern eine ausgezeichnete Bühne für den Erfahrungsaustausch auf dem Weg in die Digitalisierung von Produkten und Produktionssystemen. »Das Besondere ist der Dialog von Hochschulforschung und industrieller Entwicklung, also das Aufeinandertreffen von »Science-Push« und »Application-Pull«. Die Beiträge spiegeln die hervorragende Vernetzung in der Region OWL und darüber hinaus wider«, sagt Veranstalter Prof. Jürgen Gausemeier (Heinz Nixdorf Institut, Universität Paderborn).}}, author = {{Gausemeier, Jürgen and Bodden, Eric and Dressler, Falko and Dumitrescu, Roman and Meyer auf der Heide, Friedhelm and Scheytt, Christoph and Trächtler, Ansgar}}, isbn = {{978-3-942647-88-5}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Wissenschaftsforum Intelligente Technische Systeme (WInTeSys)}}}, doi = {{10.17619/UNIPB/1-93}}, volume = {{369}}, year = {{2017}}, } @inproceedings{24222, abstract = {{This paper focuses on the design of a high efficiency cross-connected differential drive rectifier for next-generation passive RFID tags. To provide a realistic estimation of the transponders’power and efficiency requirements at 5.8 GHz, detailed link/power-budget analysis for various blocks of the tag chip is carried out. From link budget analysis realistic RF power levels are obtained and a rectifier with high conversion efficiency at low power levels is designed. Simulations based on a commercial 65nm CMOS technology investigate the suitability of the harvesting circuit for 5.8 GHz RFID tags.}}, author = {{Haddadian, Sanaz and Scheytt, Christoph and Kramer, Roland}}, booktitle = {{ANALOG 2017; 16th ITG/GMM-Symposium}}, pages = {{18}}, publisher = {{Technische Universität Berlin}}, title = {{{Energy Harvesting Analysis for Next Generation Passive RFID Tags}}}, year = {{2017}}, } @inproceedings{24223, abstract = {{This paper presents the design flow of using sampling technique for fault injection on sche- matic level. The parameters used in the docu- ment to calculate the likelihood could be modi- fied by using more realistic data from the fab. With the help of the fault simulator, the whole design flow of the fault effect simulation can be realized automatically.}}, author = {{Wu, Liang and Abughannam, Saed and Müller, Wolfgang and Scheytt, Christoph and Ecker, Wolfgang}}, booktitle = {{2nd Workshop on Resiliency in Embedded Electronic Systems (REES)}}, pages = {{68}}, title = {{{SPICE-Level Fault Injection with Likelihood Weighted Random Sampling - A Case Study}}}, year = {{2017}}, } @inproceedings{24224, author = {{Adelt, Peer and Koppelmann, Bastian and Müller, Wolfgang and Kleinjohann, Bernd and Scheytt, Christoph}}, booktitle = {{Design Automation and Testing in Europe (DATE), University Booth Interactive Presentation}}, title = {{{ANALISA - A Tool for Static Instruction Set Analysis}}}, year = {{2017}}, } @inproceedings{24225, author = {{Adelt, Peer and Koppelmann, Bastian and Müller, Wolfgang and Kleinjohann, Bernd and Scheytt, Christoph}}, booktitle = {{2nd Workshop on Resiliency in Embedded Electronic Systems (REES) }}, pages = {{44}}, title = {{{An Automatic Injection Framework for Safety Assessements of Embedded Software Binaries}}}, year = {{2017}}, } @article{24227, abstract = {{This work describes an electrical interferometer for contactless permittivity measurements working at 120 GHz. It was fabricated in a 130 nm SiGe process featuring an ft and fmax of 240 and 330 GHz. The on-chip system contains a 120 GHz VCO with a tuning range of 7 GHz featuring a divide-by-64 circuit to enable external PLL operation. The subsequent buffer provides 7 dBm of output power at 120 GHz. Additionally, the IC contains high-precision and high-resolution phase shifters based on a slow-wave transmission line approach with digital control for direct readout ability. A 120 GHz LNA with 17 dB gain and a power detector to provide DC output signals were realized on chip. It enables sample emulation capability by phase shift inducement in the measurement as well as a reference transmission line. In terms of phase detection, the system shows a sensitivity of 907.36 MHz/°.}}, author = {{Wessel, Jan and Schmalz, Klaus and Scheytt, Christoph and Kissinger, Dietmar}}, issn = {{1558-1764}}, journal = {{IEEE Microwave and Wireless Components Letters}}, number = {{2}}, pages = {{198--200}}, title = {{{A 120-GHz Electrical Interferometer for Contactless Permittivity Measurements With Direct Digital Read-Out}}}, doi = {{10.1109/LMWC.2017.2649384}}, volume = {{27}}, year = {{2017}}, } @article{24378, author = {{Krebs, Benjamin and Wehner, Marius and Kabst, Rüdiger}}, journal = {{Personalmagazin}}, pages = {{20--23}}, title = {{{Wer hat hier das Sagen?}}}, volume = {{2}}, year = {{2017}}, } @article{24379, author = {{Krebs, Benjamin and Wehner, Marius and Kabst, Rüdiger}}, journal = {{Personalmagazin}}, pages = {{24--25}}, title = {{{Nordeuropa hat´s nicht nötig}}}, volume = {{2}}, year = {{2017}}, } @article{24380, author = {{Rauterberg, Hannah and Krebs, Benjamin}}, journal = {{Personalführung}}, pages = {{28--33}}, title = {{{Cranet Survey 2015/2016 - Stand der HR-Digitalisierung.}}}, volume = {{5}}, year = {{2017}}, } @inproceedings{24398, abstract = {{Through this study, we introduce the idea of applying scheduling techniques to allocate spatial resources that are shared among multiple robots moving in a static environment and having temporal constraints on the arrival time to destinations. To illustrate this idea, we present an exemplified algorithm that plans and assigns a motion path to each robot. The considered problem is particularly challenging because: (i) the robots share the same environment and thus the planner must take into account overlapping paths which cannot happen at the same time; (ii) there are time deadlines thus the planner must deal with temporal constraints; (iii) new requests arrive without a priori knowledge thus the planner must be able to add new paths online and adjust old plans; (iv) the robot motion is subject to noise thus the planner must be reactive to adapt to online changes. We showcase the functioning of the proposed algorithm through a set of agent-based simulations.}}, author = {{Khaluf, Yara and Markarian, Christine and Simoens, Pieter and Reina, Andreagiovanni}}, booktitle = {{International Conference on Practical Applications of Agents and Multi-Agent Systems (PAAMS 2017)}}, issn = {{0302-9743}}, title = {{{Scheduling Access to Shared Space in Multi-robot Systems}}}, doi = {{10.1007/978-3-319-59930-4_12}}, year = {{2017}}, } @article{24523, author = {{Moritzer, Elmar and Hopp, Matthias}}, issn = {{0043-2288}}, journal = {{Welding in the World}}, pages = {{1029--1038}}, title = {{{Bonding of wood-plastic composites (WPC)—material and surface modification for special applications}}}, doi = {{10.1007/s40194-017-0487-0}}, year = {{2017}}, } @inproceedings{24529, author = {{Moritzer, Elmar and Hopp, Matthias}}, booktitle = {{75th Annual Technical Conference of the Society of Plastics Engineers (ANTEC)}}, title = {{{Bonding of Plastic Parts with Dispersion Adhesives – Film Formation via Diffusion Processes}}}, year = {{2017}}, } @article{2463, author = {{Zimmermann, Steffen and Herrmann, Philipp and Kundisch, Dennis and Nault, Barrie}}, journal = {{Information Systems Research}}, title = {{{Decomposing the Variance of Consumer Ratings and the Impact on Price and Demand}}}, year = {{2017}}, } @article{24636, author = {{Philipp, Matthias and Schumm, Gregor and Peesel, Ron-Hendrik and Walmsley, Timothy G. and Atkins, Martin J. and Schlosser, Florian and Hesselbach, Jens}}, issn = {{0360-5442}}, journal = {{Energy}}, pages = {{112--123}}, title = {{{Optimal energy supply structures for industrial food processing sites in different countries considering energy transitions}}}, doi = {{10.1016/j.energy.2017.05.062}}, year = {{2017}}, } @article{24637, author = {{Schumm, G. and Philipp, M. and Schlosser, Florian and Hesselbach, J. and Walmsley, T. G. and Atkins, M. J.}}, issn = {{1570-646X}}, journal = {{Energy Efficiency}}, pages = {{1117--1133}}, title = {{{Hybrid heating system for increased energy efficiency and flexible control of low temperature heat}}}, doi = {{10.1007/s12053-017-9584-6}}, year = {{2017}}, } @article{2464, author = {{Kundisch, Dennis and von Rechenberg, Tobias}}, journal = {{Business & Information Systems Engineering}}, number = {{4}}, pages = {{207--222}}, title = {{{Does the Framing of Progress Towards Virtual Rewards Matter? Empirical Evidence from an Online Community}}}, volume = {{59}}, year = {{2017}}, } @article{2465, author = {{Meier, Christian and Kundisch, Dennis and Willeke, Jochen}}, journal = {{Business & Information Systems Engineering}}, number = {{2}}, pages = {{81--95}}, title = {{{Is it Worth the Effort? - A Decision Model to Evaluate Resource Interactions in IS Project Portfolios}}}, volume = {{59}}, year = {{2017}}, } @article{24675, author = {{Matthias, Philipp and Schlosser, Florian and Hechelmann, Ron-Hendrik and Schumm, Gregor and Holzhammer, Uwe}}, journal = {{BWK Energie-Fachmagazin}}, pages = {{57--60}}, title = {{{Sektorkopplung Prozesswärme / Strom in der deutschen Industrie. Integration der erneuerbaren Energien in den Wärmesektor.}}}, volume = {{70}}, year = {{2017}}, } @proceedings{25739, editor = {{Moritzer, Elmar and Budde, Christopher and Hüttner, Matthias and Krassmann, Dimitri}}, location = {{Dresden (Deutschland)}}, title = {{{Entwicklung einer neuartigen Fügetechnik für Organoblech-Hybridverbindungen}}}, year = {{2017}}, } @misc{25846, author = {{Dolzhenko, Irina and Rumlich, Dominik}}, publisher = {{sib.fm}}, title = {{{Понять, как они тикают [Verstehen, wie sie ticken]. Interview on CLIL conducted by Ирина Долженко [Irina Dolzhenko] on behalf of sib.fm}}}, year = {{2017}}, } @article{26040, author = {{Stefszky, Michael and Ricken, R. and Eigner, Christof and Quiring, V. and Herrmann, Harald and Silberhorn, Christine}}, issn = {{2331-7019}}, journal = {{Physical Review Applied}}, title = {{{Waveguide Cavity Resonator as a Source of Optical Squeezing}}}, doi = {{10.1103/physrevapplied.7.044026}}, year = {{2017}}, } @article{26058, author = {{Luo, Kai Hong and Herrmann, Harald and Silberhorn, Christine}}, issn = {{2058-9565}}, journal = {{Quantum Science and Technology}}, title = {{{Temporal correlations of spectrally narrowband photon pair sources}}}, doi = {{10.1088/2058-9565/aa6b8e}}, year = {{2017}}, } @article{26059, author = {{Rütz, Helge and Luo, Kai Hong and Suche, Hubertus and Silberhorn, Christine}}, issn = {{2331-7019}}, journal = {{Physical Review Applied}}, title = {{{Quantum Frequency Conversion between Infrared and Ultraviolet}}}, doi = {{10.1103/physrevapplied.7.024021}}, year = {{2017}}, } @inbook{26104, abstract = {{Selective Laser Sintering (SLS) is an Additive Manufacturing technology, which allows the production of functional polymer parts. Conventionally mainly Nylon 12 (PA 12), Polyamide 11 (PA 11), glass- or aluminum filled materials enable rapid prototyping during the product development process. Those materials do not always meet the requirements for direct production of functional parts by laser sintering. For Direct Manufacturing of functional parts out of required materials and in high quality, the laser sintering process and the material palette needs to be further developed. During this research a laser sintering test equipment for material qualification has been built up. The forthcomings are an optimized software solution, an innovative optical system, an alternative powder coating system and an improved temperature control. The functionality of the test equipment is proved with the standard material PA2200 and two new laser-sintering-materials, Nylon 6 (PA 6) and Polyamide 613 (PA 613), are investigated. The process parameters are derived and mechanical properties are determined by tensile tests.}}, author = {{Lohn, Johannes and Schmid, Hans-Joachim}}, booktitle = {{Rapid.Tech – International Trade Show & Conference for Additive Manufacturing}}, title = {{{Aufbau einer Lasersinter-Versuchsanlage und Verarbeitung neuer Materialien am Beispiel von Polyamid 6 und Polyamid 613}}}, doi = {{10.3139/9783446454606.023}}, year = {{2017}}, } @article{26106, abstract = {{We study the variation of the adhesion forces between wet TiO2 nanoparticles as a function of their size and the ambient relative humidity. Combining all-atom molecular dynamics and capillary simulations we demonstrate that the linear scaling of the interparticle forces with the particle diameter, well established for microscopic and macroscopic particles, can be extended down to diameters of a few nm. At this size scale, however, the molecular nature of the water adsorbates dictates the adhesion forces both via solvation effects and influencing parameters of analytical capillary models such as the equilibrium particle–particle separation distance and the water/particle contact angle. Moreover, the water surface tension becomes considerably larger than the macroscopic bulk value due to combined effects of thin-film confinement and tight curvature, in a way that strongly depends on humidity and particle size. Taking these effects into proper account, classical capillary equations can be used to predict the interparticle forces even of the smallest particles considered here (4 nm), although the circular approximation fails to reproduce the distance at which the water meniscus breaks. Finally, the transition between the dominating effects at the nanoscopic scale and conventional capillary theory valid at microscopic size scales can be only rationalized if the presence of roughness asperities on the surface of the large particles is explicitly taken into account.}}, author = {{Laube, Jens and Dörmann, Michael and Schmid, Hans-Joachim and Mädler, Lutz and Colombi Ciacchi, Lucio}}, issn = {{1932-7447}}, journal = {{The Journal of Physical Chemistry C}}, pages = {{15294--15303}}, title = {{{Dependencies of the Adhesion Forces between TiO2 Nanoparticles on Size and Ambient Humidity}}}, doi = {{10.1021/acs.jpcc.7b05655}}, year = {{2017}}, } @article{26107, abstract = {{Capillary forces are very important considering the handling of powders as they, in general, exceed other adhesion forces. These capillary forces are dependent on several different parameters. Especially the distance between the particles is an important parameter. For example, in moving bulk solids a large variety of distances between particles will occur. Therefore, the distance-dependence of capillary bridges was investigated with a numerical simulation method, assuming thermodynamic equilibrium which is attained very fast for small particles. This method uses the Kelvin equation and the Young-Laplace equation to calculate numerically the shape of the capillary bridge without any assumption regarding the shape. The force is eventually derived from the meniscus shape. The distance becomes extremely important when the capillary liquid bridge between two surfaces is only determined by capillary condensation depending on relative humidity. Only a slight increase of the distance within the fraction of a nanometer changes the behaviour of the capillary force significantly. Furthermore, the influence of the force on the separation of particles will be presented. The force decreases almost linearly with increasing distance for a wide range of distances and consequently, a contact stiffness for capillary bridges could be derived. These results may e.g. be used in DEM models. Also, the maximum separation distance of capillary bridges in thermodynamic equilibrium and the correlation with the according bridge volume was investigated. As two limiting cases for capillary bridges at varying distances one can assume either a constant curvature, i.e. infinitely fast attainment of equilibrium, or a constant volume, i.e. infinitely slow attainment of equilibrium. Therefore, a comparison of these two possibilities will be presented and discussed as well.}}, author = {{Dörmann, Michael and Schmid, Hans-Joachim}}, issn = {{0032-5910}}, journal = {{Powder Technology}}, pages = {{175--183}}, title = {{{Distance-dependency of capillary bridges in thermodynamic equilibrium}}}, doi = {{10.1016/j.powtec.2017.01.012}}, year = {{2017}}, } @inbook{2619, author = {{Betz, Stefan}}, booktitle = {{Aktuelle Fragestellungen zu Produktion, Logistik und Controlling}}, editor = {{Betz, Stefan}}, pages = {{85--111}}, title = {{{Strategische Erfolgsplanung für Produktinnovationen}}}, year = {{2017}}, } @inbook{2620, author = {{Betz, Stefan}}, booktitle = {{Aktuelle Fragestellungen zu Produktion, Logistik und Controlling}}, editor = {{Betz, Stefan}}, pages = {{299--328}}, title = {{{Lagerkapazitätsdimensionierung als betriebswirtschaftliches Entscheidungsproblem}}}, year = {{2017}}, } @phdthesis{26246, author = {{Iwanek, Peter}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Systematik zur Steigerung der Intelligenz mechatronischer Systeme im Maschinen- und Anlagenbau}}}, volume = {{366}}, year = {{2017}}, } @phdthesis{26247, author = {{Schierbaum, Thomas}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Systematik zur Kostenbewertung im Systementwurf mechatronischer Systeme in der Technologie Molded Interconnect Devices (MID)}}}, volume = {{368}}, year = {{2017}}, } @phdthesis{26248, author = {{Westermann, Thorsten}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Systematik zur Reifegradmodell-basierten Planung von Cyber-Physical Systems des Maschinen- und Anlagenbaus}}}, volume = {{375}}, year = {{2017}}, } @article{26307, author = {{Sperling, Jan and Walmsley, I. A.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, title = {{{Separable and Inseparable Quantum Trajectories}}}, doi = {{10.1103/physrevlett.119.170401}}, year = {{2017}}, } @article{26308, author = {{Kröger, Johannes and Ahrens, Thomas and Sperling, Jan and Vogel, Werner and Stolz, Heinrich and Hage, Boris}}, issn = {{0953-4075}}, journal = {{Journal of Physics B: Atomic, Molecular and Optical Physics}}, title = {{{High intensity click statistics from a 10 × 10 avalanche photodiode array}}}, doi = {{10.1088/1361-6455/aa8e68}}, year = {{2017}}, } @article{26309, author = {{Sperling, Jan and Perez-Leija, Armando and Busch, Kurt and Walmsley, Ian A.}}, issn = {{2469-9926}}, journal = {{Physical Review A}}, title = {{{Quantum coherences of indistinguishable particles}}}, doi = {{10.1103/physreva.96.032334}}, year = {{2017}}, } @article{26310, author = {{Agudelo, E. and Sperling, Jan and Costanzo, L. S. and Bellini, M. and Zavatta, A. and Vogel, W.}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, title = {{{Conditional Hybrid Nonclassicality}}}, doi = {{10.1103/physrevlett.119.120403}}, year = {{2017}}, }