@article{62643, author = {{Schwabe, Tobias and Kress, Christian and Kruse, Stephan and Weizel, Maxim and Rhee, Hanjo and Scheytt, J. Christoph}}, journal = {{Journal of Lightwave Technology}}, keywords = {{Integrated circuit modeling, Capacitance, Silicon, Modulation, Adaptation models, Semiconductor device modeling, Bandwidth, Data communication, electrooptical transmitter, equalization, free-carrier-plasma dispersion effect, modelling, optical modulator, phase shifter, silicon photonics}}, number = {{1}}, pages = {{255--270}}, title = {{{Forward-Biased Silicon Phase Shifter Modeling for Electronic-Photonic Co-Simulation and Validation in a 250 nm EPIC BiCMOS Technology}}}, doi = {{10.1109/JLT.2024.3450949}}, volume = {{43}}, year = {{2025}}, } @inproceedings{62642, author = {{Kruse, Stephan and Brockmeier, Jan and Schwengelbeck, Max and Schwabe, Tobias and Scheytt, J. Christoph}}, booktitle = {{2025 55th European Microwave Conference (EuMC)}}, keywords = {{Phased arrays, Optical fibers, Optical fiber sensors, Laser radar, Optical variables measurement, Apertures, Light emitting diodes, Optical receivers, Optical transmitters, Optical modulation, Lidar, light detection and ranging, FMCW, frequency modulated contentious wave, visible light sensing (VLS), visible light communication (VLC), automotive headlights, light emitting diode (LED), microwave photonics, wireless sensing}}, pages = {{602--605}}, title = {{{A Photonic Assisted Visible Light FMCW Lidar System for Large Aperture Phased Array MIMO Based on LEDs}}}, doi = {{10.23919/EuMC65286.2025.11235259}}, year = {{2025}}, } @article{62644, author = {{Schwabe, Tobias and Kress, Christian and Sadiye, Babak and Kruse, Stephan and Scheytt, J. Christoph}}, journal = {{IEEE Access}}, keywords = {{Optical attenuators, Equalizers, Phase shifters, Optical modulation, Electro-optic modulators, Optical amplifiers, Circuits, Silicon photonics, Optical saturation, Integrated circuit modeling, Data communication, equalization, electro-optical transmitter, silicon photonics, phase shifter, optical modulator, free-carrier plasma dispersion effect, driver architectures, biasing schemes}}, pages = {{192433--192450}}, title = {{{Analysis and Design of Forward Biased Silicon Photonics Phase Shifter Equalizer Circuits}}}, doi = {{10.1109/ACCESS.2025.3629385}}, volume = {{13}}, year = {{2025}}, } @inbook{55086, abstract = {{Wir beschreiben den Versuch, »Verständigungskompetenzen« im Sinne von Ludwig Huber in der Graduiertenförderung zu entwickeln. Verständigung ist für Huber integraler Bestandteil wissenschaftlicher Erkenntnis. Wissenschaftler:in- nen werden aber in die Praktiken ihrer Disziplin hineinsozialisiert; die dabei entstehen- de disziplinäre Identität und ihre Selbstverständlichkeiten sind zentral für Teilhabe am Wissenschaftssystem. Das erschwert Verständigung prinzipiell, insbesondere das Nach- vollziehen der Wahrnehmungen und Sinnkonstruktionen der Adressat:innen des eige- nen Wissenschaftshandelns. Ausgehend von der Beobachtung, dass Doktorand:innen ihre Disziplin als selbstverständlichen Zugang zum Gegenstand betrachten, stellen wir das Konzept einer Sommerschule vor, das darauf zielt, die Abstraktion von der eigenen disziplinären Perspektive zu ermöglichen, Systemwissen fördert und Verständigungs- prozesse anstößt.}}, author = {{Jenert, Tobias and Scharlau, Ingrid}}, booktitle = {{Wissenschaftsdidaktik IV: Wissenschaftskommunikation}}, editor = {{Reinmann, Gabi and Rhein, Rüdiger}}, isbn = {{ 978-3-8376-6297-9 }}, keywords = {{science communication, Wissenschaftskommunikation, Wissenschaftsdidaktik, young researchers, Nachwuchsförderung}}, pages = {{161--184}}, publisher = {{transcript}}, title = {{{Interdisziplinäre Verständigung als Baustein wissenschaftsdidaktischer Kompetenz}}}, year = {{2024}}, } @article{53622, abstract = {{In K-12 computing education, there is a need to identify and teach concepts that are relevant to understanding machine learning technologies. Studies of teaching approaches often evaluate whether students have learned the concepts. However, scant research has examined whether such concepts support understanding digital artefacts from everyday life and developing agency in a digital world. This paper presents a qualitative study that explores students’ perspectives on the relevance of learning concepts of data-driven technologies for navigating the digital world. The underlying approach of the study is data awareness, which aims to support students in understanding and reflecting on such technologies to develop agency in a data-driven world. This approach teaches students an explanatory model encompassing several concepts of the role of data in data-driven technologies. We developed an intervention and conducted retrospective interviews with students. Findings from the analysis of the interviews indicate that students can analyse and understand data-driven technologies from their everyday lives according to the central role of data. In addition, students’ answers revealed four areas of how learning about data-driven technologies becomes relevant to them. The paper concludes with a preliminary model suggesting how computing education can make concepts of data-driven technologies meaningful for students to understand and navigate the digital world.}}, author = {{Höper, Lukas and Schulte, Carsten}}, issn = {{1648-5831}}, journal = {{Informatics in Education}}, keywords = {{Computer Science Applications, Communication, Education, General Engineering}}, publisher = {{Vilnius University Press}}, title = {{{Empowering Students for the Data-Driven World: A Qualitative Study of the Relevance of Learning about Data-Driven Technologies}}}, doi = {{10.15388/infedu.2024.19}}, year = {{2024}}, } @article{50009, abstract = {{ In the past decades, the notion of voice in the theorizing and teaching of academic writing has been the subject of much debate and conceptual change, especially concerning its relation to writer identity. Many newer accounts of voice and identity in academic writing draw on the dialogical concept of voice by Bakhtin. However, some theoretical and methodological inconsistencies have surfaced in the adaptions of the concept. Working from a refinement of the dialogical notion of voice based on the concepts of polyphony and interiorization, this article presents a methodological approach for analyzing voice(s) in writing. The article presents material around the evolution of an early-career researcher’s dissertation synopsis. The material is multilayered, including the writer’s text, transcripts from an interdisciplinary peer-feedback conversation with two colleagues, and a video-stimulated interview with the writer. Excerpts of the material were analyzed to trace the polyphony of interiorized voices that influenced the writing. This focus revealed the multivoicedness of academic texts as an effect of their history of coming into being. This article contributes to the question of voice and identity in academic writing from a dialogical psycholinguistic perspective by presenting a de-reifying notion of voice grounded in an understanding of writing as a polyphonic activity, which also feeds into the formation of a writer’s self. }}, author = {{Karsten, Andrea}}, issn = {{0741-0883}}, journal = {{Written Communication}}, keywords = {{Literature and Literary Theory, Communication}}, number = {{1}}, pages = {{6--36}}, publisher = {{SAGE Publications}}, title = {{{Voices in Dialogue: Taking Polyphony in Academic Writing Seriously}}}, doi = {{10.1177/07410883231207104}}, volume = {{41}}, year = {{2024}}, } @article{51345, abstract = {{ The algorithmic imaginary as a theoretical concept has received increasing attention in recent years as it aims at users’ appropriation of algorithmic processes operating in opacity. But the concept originally only starts from the users’ point of view, while the processes on the platforms’ side are largely left out. In contrast, this paper argues that what is true for users is also valid for algorithmic processes and the designers behind. On the one hand, the algorithm imagines users’ future behavior via machine learning, which is supposed to predict all their future actions. On the other hand, the designers anticipate different actions that could potentially performed by users with every new implementation of features such as social media feeds. In order to bring into view this permanently reciprocal interplay coupled to the imaginary, in which not only the users are involved, I will argue for a more comprehensive and theoretically precise algorithmic imaginary referring to the theory of Cornelius Castoriadis. In such a perspective, an important contribution can be formulated for a theory of social media platforms that goes beyond praxeocentrism or structural determinism. }}, author = {{Schulz, Christian}}, issn = {{0163-4437}}, journal = {{Media, Culture & Society}}, keywords = {{Sociology and Political Science, Communication}}, number = {{3}}, pages = {{646--655}}, publisher = {{SAGE Publications}}, title = {{{A new algorithmic imaginary}}}, doi = {{10.1177/01634437221136014}}, volume = {{45}}, year = {{2023}}, } @article{51368, abstract = {{Dealing with opaque algorithms, the frequent overlap between transparency and explainability produces seemingly unsolvable dilemmas, as the much-discussed trade-off between model performance and model transparency. Referring to Niklas Luhmann's notion of communication, the paper argues that explainability does not necessarily require transparency and proposes an alternative approach. Explanations as communicative processes do not imply any disclosure of thoughts or neural processes, but only reformulations that provide the partners with additional elements and enable them to understand (from their perspective) what has been done and why. Recent computational approaches aiming at post-hoc explainability reproduce what happens in communication, producing explanations of the working of algorithms that can be different from the processes of the algorithms.}}, author = {{Esposito, Elena }}, journal = {{Sociologica}}, keywords = {{Explainable AI, Transparency, Explanation, Communication, Sociological systems theory}}, number = {{3}}, pages = {{17--27}}, title = {{{Does Explainability Require Transparency?}}}, doi = {{10.6092/ISSN.1971-8853/15804}}, volume = {{16}}, year = {{2023}}, } @article{47151, abstract = {{When it comes to mastering the digital world, the education system is more and more facing the task of making students competent and self-determined agents when interacting with digital artefacts. This task often falls to computing education. In the traditional fields of computing education, a plethora of models, guidelines, and principles exist, which help scholars and teachers identify what the relevant aspects are and which of them one should cover in the classroom. When it comes to explaining the world of digital artefacts, however, there is hardly any such guiding model. The ARIadne model introduced in this paper provides a means of explanation and exploration of digital artefacts which help teachers and students to do a subject analysis of digital artefacts by scrutinizing them from several perspectives. Instead of artificially separating aspects which target the same phenomena within different areas of education (like computing, ICT or media education), the model integrates technological aspects of digital artefacts and the relevant societal discourses of their usage, their impacts and the reasons behind their development into a coherent explanation model.}}, author = {{Winkelnkemper, Felix and Höper, Lukas and Schulte, Carsten}}, issn = {{1648-5831}}, journal = {{Informatics in Education}}, keywords = {{Computer Science Applications, Communication, Education, General Engineering}}, publisher = {{Vilnius University Press}}, title = {{{ARIadne – An Explanation Model for Digital Artefacts}}}, doi = {{10.15388/infedu.2024.09}}, year = {{2023}}, } @article{34200, abstract = {{Praxeologische Kompetenzansätze verstehen Kompetenz als sozial erlernt und folglich als relativ zum sozialen Kontext. Damit einher geht die Frage, wie solche praxeologisch gerahmten Kompetenzen eigentlich unabhängig von der sie hervorbringenden Praxis evaluiert werden können – und eben dadurch erst für einen breiteren Kompetenzdiskurs fruchtbar sind. Die Dokumentarische Evaluationsforschung bietet hierzu erste Anhaltspunkte, offenbart aber auch Grenzen, die mit dem Evaluationsverständnis zusammenhängen, sich jedoch in der Forschungspraxis so nicht finden lassen. Aus der Differenz zwischen Methode und Praxis dokumentarischer Evaluation lässt sich formulieren, wie eine praxeologische Evaluation gestaltet werden könnte. Dabei spielt die Formulierung von Referenzrahmen eine zentrale Rolle, welche einerseits der zu evaluierenden Praktik external sein, andererseits praktisch formuliert werden müssen, damit sie soziale Praktiken jenseits ihrer eigenen Sinnhaftigkeit evaluativ (er-)fassen können.}}, author = {{Bloh, Thiemo}}, issn = {{1619-5515}}, journal = {{Zeitschrift für Evaluation}}, keywords = {{Strategy and Management, Applied Psychology, Social Sciences (miscellaneous), Education, Communication, Statistics and Probability}}, number = {{02}}, pages = {{193--215}}, publisher = {{Waxmann}}, title = {{{Rekonstruktive Evaluationsforschung im Kontext praxeologischer Kompetenzdiskurse. Kritische Reflexionen und konzeptionelle Überlegungen zur Dokumentarischen Evaluationsforschung}}}, doi = {{10.31244/zfe.2022.02.02}}, volume = {{2022}}, year = {{2022}}, } @article{51344, abstract = {{Modified action demonstration—dubbed motionese—has been proposed as a way to help children recognize the structure and meaning of actions. However, until now, it has been investigated only in young infants. This brief research report presents findings from a cross-sectional study of parental action demonstrations to three groups of 8–11, 12–23, and 24–30-month-old children that applied seven motionese parameters; a second study investigated the youngest group of participants longitudinally to corroborate the cross-sectional results. Results of both studies suggested that four motionese parameters (Motion Pauses, Pace, Velocity, Acceleration) seem to structure the action by organizing it in motion pauses. Whereas these parameters persist over different ages, three other parameters (Demonstration Length, Roundness, and Range) occur predominantly in the younger group and seem to serve to organize infants' attention on the basis of movement. Results are discussed in terms of facilitative vs. pedagogical learning.}}, author = {{Rohlfing, Katharina and Vollmer, Anna-Lisa and Fritsch, Jannik and Wrede, Britta}}, issn = {{2297-900X}}, journal = {{Frontiers in Communication}}, keywords = {{Social Sciences (miscellaneous), Communication}}, publisher = {{Frontiers Media SA}}, title = {{{Which “motionese” parameters change with children's age? Disentangling attention-getting from action-structuring modifications}}}, doi = {{10.3389/fcomm.2022.922405}}, volume = {{7}}, year = {{2022}}, } @article{37151, author = {{Kapidzic, Sanja and Neuberger, Christoph and Frey, Felix and Stieglitz, Stefan and Mirbabaie, Milad}}, issn = {{1461-670X}}, journal = {{Journalism Studies}}, keywords = {{Communication}}, number = {{10}}, pages = {{1247--1268}}, publisher = {{Informa UK Limited}}, title = {{{How News Websites Refer to Twitter: A Content Analysis of Twitter Sources in Journalism}}}, doi = {{10.1080/1461670x.2022.2078400}}, volume = {{23}}, year = {{2022}}, } @inbook{29720, author = {{Passey, Don and Brinda, Torsten and Cornu, Bernard and Holvikivi, Jaana and Lewin, Cathy and Magenheim, Johannes and Morel, Raymond and Osorio, Javier and Tatnall, Arthur and Thompson, Barrie and Webb, Mary}}, booktitle = {{Advancing Research in Information and Communication Technology}}, editor = {{Goedicke, Michael and Neuhold, Erich and Rannenberg, Kai}}, isbn = {{978-3-030-81700-8}}, issn = {{1868-422X}}, keywords = {{Educational technologies, Education and technologies, Digital technologies and education, Information technologies, Communication technologies, Educational technologies and research, Educational technologies and pedagogical practices, Educational technologies and policy, Educational management and technologies, Professional development and educational technologies}}, pages = {{129--152}}, publisher = {{Springer, Cham}}, title = {{{Computers and Education – Recognising Opportunities and Managing Challenges}}}, doi = {{10.1007/978-3-030-81701-5_5}}, volume = {{AICT-600}}, year = {{2021}}, } @inproceedings{15368, abstract = {{Service Level Agreements are essential tools enabling clients and telco operators to specify required quality of service. The 5GTANGO NFV platform enables SLAs through policies and custom service lifecycle management components. This allows the operator to trigger certain lifecycle management events for a service, and the network service developer to define how to execute such events (e.g., how to scale). In this demo we will demonstrate this unique 5GTANGO concept using an elastic proxy service supported by a high availability SLA enforced through a range of traffic regimes.}}, author = {{Soenen, Thomas and Vicens, Felipe and Bonnet, José and Parada, Carlos and Kapassa, Evgenia and Touloupou, Marious and Fotopulou, Eleni and Zafeiropoulos, Anastasios and Pol, Ana and Kolometsos, Stavros and Xilouris, George and Alemany, Pol and Vilalta, Ricard and Trakadas, Panos and Karkazis, Panos and Peuster, Manuel and Tavernier, Wouter}}, booktitle = {{2019 IFIP/IEEE Symposium on Integrated Network and Service Management (IM)}}, issn = {{1573-0077}}, keywords = {{5G mobile communication, contracts, quality of service, telecommunication traffic, virtualisation, custom service lifecycle management components, lifecycle management events, network service developer, elastic proxy service, SLA-controlled proxy service, customisable MANO, operator policies, Service Level Agreements, unique 5G TANGO concept, 5G TANGO NFV platform, quality of service, traffic regimes, high availability SLA, Monitoring, Probes, Portals, Quality of service, Tools, Servers, Graphical user interfaces}}, location = {{Arlington, VA, USA, USA}}, pages = {{707--708}}, title = {{{SLA-controlled Proxy Service Through Customisable MANO Supporting Operator Policies}}}, year = {{2019}}, } @article{42674, author = {{Klowait, Nils}}, issn = {{1369-118X}}, journal = {{Information, Communication & Society}}, keywords = {{Library and Information Sciences, Communication}}, number = {{5}}, pages = {{605--621}}, publisher = {{Informa UK Limited}}, title = {{{Interactionism in the age of ubiquitous telecommunication}}}, doi = {{10.1080/1369118x.2019.1566487}}, volume = {{22}}, year = {{2019}}, } @article{35756, abstract = {{ Purpose Leveraging social action theory, social network theory and the notion of network externality, the purpose of this paper is to model two different return on investment (ROI) measures: the networked ROI which captures the network effect originating from a social media investment, and the discrete ROI which focuses social media discrete returns from individual users. Design/methodology/approach A field experiment was set up over a period of three months to test the effects of two variants of an advertisement campaign (a social vs a discrete ad) on the modeled networked and discrete ROIs. Findings The authors find that emphasizing discrete user actions leads to lower network gains, but higher monetary returns while the social action emphasis produces higher network gains, but lower monetary returns. The study further suggests that social action focus is preferable for brand promotion and engagement, whereas the discrete action focus is suitable for boosting sales and website traffic. Practical implications Several potential implications for social media researchers and marketers are also discussed. Originality/value The authors for the first time showed that that the social media returns are derived not only from individual actions taken by the user (e.g. likes and shares) but also from users’ social interdependencies and the additional exposure that results from network effects. }}, author = {{Khan, Gohar and Mohaisen, Manar and Trier, Matthias}}, issn = {{1066-2243}}, journal = {{Internet Research}}, keywords = {{Economics and Econometrics, Sociology and Political Science, Communication}}, number = {{2}}, pages = {{631--652}}, publisher = {{Emerald}}, title = {{{The network ROI}}}, doi = {{10.1108/intr-07-2018-0346}}, volume = {{30}}, year = {{2019}}, } @article{11886, abstract = {{Today, we are often surrounded by devices with one or more microphones, such as smartphones, laptops, and wireless microphones. If they are part of an acoustic sensor network, their distribution in the environment can be beneficially exploited for various speech processing tasks. However, applications like speaker localization, speaker tracking, and speech enhancement by beamforming avail themselves of the geometrical configuration of the sensors. Therefore, acoustic microphone geometry calibration has recently become a very active field of research. This article provides an application-oriented, comprehensive survey of existing methods for microphone position self-calibration, which will be categorized by the measurements they use and the scenarios they can calibrate. Selected methods will be evaluated comparatively with real-world recordings.}}, author = {{Plinge, Axel and Jacob, Florian and Haeb-Umbach, Reinhold and Fink, Gernot A.}}, issn = {{1053-5888}}, journal = {{IEEE Signal Processing Magazine}}, keywords = {{Acoustic sensors, Microphones, Portable computers, Smart phones, Wireless communication, Wireless sensor networks}}, number = {{4}}, pages = {{14--29}}, title = {{{Acoustic Microphone Geometry Calibration: An overview and experimental evaluation of state-of-the-art algorithms}}}, doi = {{10.1109/MSP.2016.2555198}}, volume = {{33}}, year = {{2016}}, } @inproceedings{17202, author = {{Vollmer, Anna-Lisa and Grizou, Jonathan and Lopes, Manuel and Rohlfing, Katharina and Oudeyer, Pierre-Yves}}, booktitle = {{2014 Joint IEEE International Conference on Development and Learning and on Epigenetic Robotics}}, isbn = {{978-1-4799-7540-2}}, keywords = {{interaction, communication, co-construction, interaction protocols}}, pages = {{208 -- 215}}, publisher = {{IEEE}}, title = {{{Studying the Co-Construction of Interaction Protocols in Collaborative Tasks with Humans}}}, year = {{2014}}, } @inproceedings{13322, abstract = {{Previous research suggests the existence of sentiments in online social networks. In comparison to real life human interaction, in which sentiments have been shown to have an influence on human behaviour, it is not yet completely understood which mechanisms explain how sentiments influence users in online environments. We develop a theoretical framework that tries to bridge the gap between social influence theories that focus on offline interactions on one hand and online interaction in social networks on the other hand. We then test our hypothesis about the influence and dissemination of sentiments in a quantitative analysis that is based on retrieved textual messages of communication patterns in over 12000 online social networks. Our empirical results suggest a general influence of sentiments on node communication patterns that is evidenced by increased occurrences of subsequent messages that express the same sentiment polarization. We interpret these findings and suggest future research to advance our currently limited theories that assume perceived and generalized social influence to path-dependent social influence models that consider actual behaviour.}}, author = {{Hillmann, Robert and Trier, Matthias}}, booktitle = {{ECIS 2013 Proceedings}}, isbn = {{9783834924421}}, keywords = {{Social Network Analysis, Sentiment Analysis, Communication Patterns}}, publisher = {{Association for Information Systems. AIS Electronic Library (AISeL)}}, title = {{{Influence and Dissemination Of Sentiments in Social Network Communication Patterns}}}, year = {{2013}}, } @article{17233, abstract = {{It has been proposed that the design of robots might benefit from interactions that are similar to caregiver–child interactions, which is tailored to children’s respective capacities to a high degree. However, so far little is known about how people adapt their tutoring behaviour to robots and whether robots can evoke input that is similar to child-directed interaction. The paper presents detailed analyses of speakers’ linguistic and non-linguistic behaviour, such as action demonstration, in two comparable situations: In one experiment, parents described and explained to their nonverbal infants the use of certain everyday objects; in the other experiment, participants tutored a simulated robot on the same objects. The results, which show considerable differences between the two situations on almost all measures, are discussed in the light of the computer-as-social-actor paradigm and the register hypothesis.}}, author = {{Fischer, Kerstin and Foth, Kilian and Rohlfing, Katharina and Wrede, Britta}}, issn = {{1572-0381}}, journal = {{Interaction Studies}}, keywords = {{human–robot interaction (HRI), social communication, register theory, motionese, robotese, child-directed speech (CDS), motherese, mindless transfer, computers-as-social-actors}}, number = {{1}}, pages = {{134--161}}, publisher = {{John Benjamins Publishing Company}}, title = {{{Mindful tutors: Linguistic choice and action demonstration in speech to infants and a simulated robot}}}, doi = {{10.1075/is.12.1.06fis}}, volume = {{12}}, year = {{2011}}, }