@article{FroeseJainNiedermeieretal., author = {Froese, Vincent and Jain, Brijnesh and Niedermeier, Rolf and Renken, Malte}, title = {Comparing temporal graphs using dynamic time warping}, series = {Social Network Analysis and Mining}, volume = {10}, journal = {Social Network Analysis and Mining}, publisher = {Springer Nature}, doi = {10.1007/s13278-020-00664-5}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-38493}, pages = {1 -- 16}, abstract = {Within many real-world networks, the links between pairs of nodes change over time. Thus, there has been a recent boom in studying temporal graphs. Recognizing patterns in temporal graphs requires a proximity measure to compare different temporal graphs. To this end, we propose to study dynamic time warping on temporal graphs. We define the dynamic tem- poral graph warping (dtgw) distance to determine the dissimilarity of two temporal graphs. Our novel measure is flexible and can be applied in various application domains. We show that computing the dtgw-distance is a challenging (in general) NP-hard optimization problem and identify some polynomial-time solvable special cases. Moreover, we develop a quadratic programming formulation and an efficient heuristic. In experiments on real-world data, we show that the heuristic performs very well and that our dtgw-distance performs favorably in de-anonymizing networks compared to other approaches.}, language = {en} } @misc{OPUS4-3577, title = {Angewandte Forschung in der Wirtschaftsinformatik 2020 : Tagungsband zur 33. AKWI-Jahrestagung am 14.09.2020 ausgerichtet von der Hochschule Karlsruhe - Wirtschaft und Technik}, editor = {Nees, Franz and Stengel, Ingo and Meister, Vera G. and Barton, Thomas and Herrmann, Frank and M{\"u}ller, Christian and Wolf, Martin R.}, publisher = {mana-Buch}, address = {Heide}, isbn = {978-3-944330-66-2}, doi = {10.15771/978-3-944330-66-2}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-13840}, pages = {147}, language = {de} } @misc{Mauerer, author = {Mauerer, Wolfgang}, title = {Safety, Security, Quality: Artificial Intelligence versus Common Sense}, series = {Open Source Summit North America and Embedded Linux Conference North America 2020}, journal = {Open Source Summit North America and Embedded Linux Conference North America 2020}, language = {en} } @misc{Mauerer, author = {Mauerer, Wolfgang}, title = {Open Source in Research and Reality}, series = {Open Source Summit North America and Embedded Linux Conference North America 2020}, journal = {Open Source Summit North America and Embedded Linux Conference North America 2020}, language = {en} } @misc{RennerPozzobonMottok, author = {Renner, Sebastian and Pozzobon, Enrico and Mottok, J{\"u}rgen}, title = {Current and Future Efforts in Benchmarking NIST LWC Ciphers}, series = {4th Lightweight Cryptography Workshop 2020 at NIST, Gaithersburg, USA}, journal = {4th Lightweight Cryptography Workshop 2020 at NIST, Gaithersburg, USA}, language = {en} } @article{KoenningStrahringerWestner, author = {K{\"o}nning, Michael and Strahringer, Susanne and Westner, Markus}, title = {Unraveling the impact of cultural distance on IT outsourcing success}, series = {Journal of Enterprise Information Management}, volume = {34}, journal = {Journal of Enterprise Information Management}, number = {3}, publisher = {Emerald}, doi = {10.1108/JEIM-06-2019-0151}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-8708}, pages = {811 -- 837}, abstract = {PURPOSE IT outsourcing (ITO) has developed into an established practice for organizations but the interorganizational and oftentimes international collaboration it involves comes at a price: Reports from academia and practice suggest that more than 25\% of all ITO projects fail, many because of cultural differences between client and provider organizations. Against this background, this paper analyzes the complex nature of cultural distance and its multi-faceted effect on ITO success. DESIGN/METHODOLOGY/APPROACH This paper builds upon extant literature on culture on the national, organizational and team level, conceptualizes its effect on relationship quality and ITO success, and hypothesizes a model on potential moderators and management techniques to offset culture-induced challenges. It then evaluates and refines the model by means of an interpretive qualitative research design for an in-depth single-case study of ProSiebenSat.1 Media SE (P7S1), a leading European media company that reconfigured its IT sourcing model three times in 10 years. FINDINGS The results from interviews with top managers from client and provider organizations represent one of the first integrated views on the critical importance of cultural compatibility on multiple levels, provide manifold examples for its complex effect on ITO success, as well as moderators and potential management techniques to promote ITO success. RESEARCH LIMITATIONS/IMPLICATIONS This paper contributes relevant empirical insights to the growing body of literature on culture and its underestimated role in ITO success. It builds on tentative theory that is confirmed and refined. PRACTICAL IMPLICATIONS The paper helps in substantiating the complex and intangible nature of culture and demonstrates means for its effective management. ORIGINALITY/VALUE The results from interviews with top managers from client and provider organizations represent one of the first integrated views on the critical importance of cultural compatibility on multiple levels, provide manifold examples for its complex effect on ITO success, as well as moderators and potential management techniques to promote ITO success.}, language = {en} } @unpublished{Steffens, author = {Steffens, Oliver}, title = {Leibniz, Llull and the Logic of Truth: Precursors of Artificial Intelligence}, address = {Regensburg}, doi = {10.13140/RG.2.2.28425.06243}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-58399}, pages = {10}, abstract = {Mankind has always been confronted with limited knowledge about Nature and many people devoted their lives and intellects to the very question: How to gain knowledge, confirm ideas and theories, and understand the world we live in? Religion was one fundamental base for explanations and existential questions. Philosophy and Science were the other. Nowadays, science and technology dominate our daily lives, religion and metaphysics have lost their former dominance, while our thoughts and factual knowledge are increasingly governed by the digitised versions of conversation and discussion, filtered and guided by the algorithms of social networks. Today, "artificial intelligence" is a phenomenon in information technology which takes over everyday routines. A new ideal, a new promise, and at the same time used as a stratagem by political and economic systems to guide and manipulate our thinking, values, and behaviour. But nothing is so new that one could not find its precursors in earlier times. Science and mathematics has kindled many brilliant ideas. Can we describe the world by numbers, find truth and explanation in mathematical structures? This essay is devoted to early ideas by the medieval philosopher Ram{\´o}n Llull, the great rationalist G.W. Leibniz, and early approaches to combinations, number theory. and information processing. Llull's thinking machine and subsequent endeavours to find methods of mechanical reasoning and inference paved the way to modern-day concepts of artificial intelligence.}, language = {en} } @article{Lauer, author = {Lauer, Norina}, title = {Teletherapie - hat die Logop{\"a}die eine digitale Zukunft?}, series = {Forum Logop{\"a}die}, volume = {34}, journal = {Forum Logop{\"a}die}, number = {5}, doi = {10.2443/skv-s-2020-53020200502}, pages = {12 -- 17}, abstract = {Teletherapie beinhaltet vielf{\"a}ltige synchrone und asynchrone M{\"o}glichkeiten zur digitalen Versorgung von PatientInnen. Die Videotherapie stellt hierbei ein wichtiges synchrones Angebot dar, mit dem das therapeutische Angebot erweitert werden kann. Internationale Studien und auch Studien aus Deutschland best{\"a}tigen das Potenzial des Einbezugs digitaler Maßnahmen in die therapeutische Versorgung. In diesem Beitrag werden die Ergebnisse einer qualitativen Studie pr{\"a}sentiert, in der die in der COVID-19-Krise gesammelten Erfahrungen von TherapeutInnen mit Videotherapie vorgestellt werden.}, subject = {Logop{\"a}die}, language = {de} } @incollection{Raptis, author = {Raptis, Georgios}, title = {Gew{\"a}hrleistung der IT-Sicherheit bei vernetzten Implantaten}, series = {Biomedizinische Technik: Vernetzte und intelligente Implantate}, booktitle = {Biomedizinische Technik: Vernetzte und intelligente Implantate}, editor = {Marschner, Uwe and Clasbrummel, Bernhard and Dehm, Johannes}, publisher = {Walter de Gruyter}, isbn = {978-3-11-034927-6}, pages = {182 -- 192}, subject = {Implantat}, language = {de} } @incollection{HaugSchmidbauer, author = {Haug, Sonja and Schmidbauer, Simon}, title = {Integrationskonzepte und Messung von Integration auf kommunaler Ebene}, series = {Integration - Teilhabe und Zusammenleben in der Migrationsgesellschaft}, booktitle = {Integration - Teilhabe und Zusammenleben in der Migrationsgesellschaft}, editor = {Spieker, Michael and Hofmann, Christian}, publisher = {Nomos}, address = {Baden-Baden}, isbn = {9783748910558}, pages = {69 -- 84}, subject = {Soziale Integration}, language = {de} } @inproceedings{WeissRennerMottoketal., author = {Weiss, Nils and Renner, Sebastian and Mottok, J{\"u}rgen and Matoušek, V{\´a}clav}, title = {Transport Layer Scanning for Attack Surface Detection in Vehicular Networks}, series = {CSCS '20: Computer Science in Cars Symposium}, booktitle = {CSCS '20: Computer Science in Cars Symposium}, number = {7}, address = {Feldkirchen}, doi = {10.1145/3385958.3430476}, pages = {1 -- 8}, abstract = {In the beginning of every security analysis or penetration test of a system, information about the target has to be gathered. On IT-Systems a port scan is usually performed as a first step of an investigation. Since the communication protocols differ in automotive systems, generic port scanning tools can't be used for a security analysis of CANs. More complex protocols have a higher likelihood of implementation errors and bugs. On CAN networks, such payloads are transferred through International Standard Transport Protocol (ISO-TP) communication. We designed a new methodology to identify ISO-TP endpoints in automotive networks. Every of these endpoints can provide exploitable application layer protocols and therefor has to be considered during penetration testing and security analysis. We contribute a new scan approach for the automated evaluation of possible attack surfaces in automotive CAN networks which has a higher coverage and multiple advantages than state of the art approaches.}, language = {en} } @inproceedings{ReuterStarkSedelmaieretal., author = {Reuter, Rebecca and Stark, Theresa and Sedelmaier, Yvonne and Landes, Dieter and Mottok, J{\"u}rgen and Wolff, Christian}, title = {Insights in Students' Problems during UML Modeling}, series = {2020 IEEE Global Engineering Education Conference (EDUCON): Proceedings}, booktitle = {2020 IEEE Global Engineering Education Conference (EDUCON): Proceedings}, doi = {10.1109/EDUCON45650.2020.9125110}, pages = {592 -- 600}, abstract = {UML (Unified Modeling Language) is the current de facto as well as de jure standard (ISO/IEC 19505:2012) notation to visualize models in software development. UML provides essential guidelines and rules to visualize and understand complex software systems. This is the reason why it has become part of curricula for software engineering courses at many universities worldwide. It is well known, however, that UML is hard to grasp for novices, mainly due to its complexity. In order to tackle the problem of teaching UML to novice students appropriately, it is inevitable to understand their needs and problems much better than we do now. This paper presents empirical insights into students' problems when developing common UML diagrams. Identified problems are generalized, giving rise to a problem catalogue that is derived from our empirical findings, thus establishing a basis for addressing these problems through focused learning arrangements.}, language = {en} } @inproceedings{GruberWolffMottoketal., author = {Gruber, Hans and Wolff, Christian and Mottok, J{\"u}rgen and Bazo, Alexander and Hauser, Florian and Schreistetter, Stefan}, title = {Tutorial on Software Engineering Education in Co-Located Multi-User Eye-Tracking-Environments}, series = {Proceedings of the 32nd IEEE Conference on Software Engineering Education and Training: Munich, November 2020}, booktitle = {Proceedings of the 32nd IEEE Conference on Software Engineering Education and Training: Munich, November 2020}, doi = {10.1109/CSEET49119.2020.9206170}, abstract = {We briefly describe a tutorial on the application of Eye-Tracking technology for Software Engineering Education. We will showcase our setup of a large-scale Eye-Tracking-Classroom and its usage for real-time improvement of traditional learning scenarios in Software Engineering Education. We will focus on the integration of gaze data into modern integrated development environments (IDEs) and demonstrate a complete workflow for its usage in co-located multi-user Eye-Tracking-Environments.}, language = {en} } @inproceedings{HauserSchreistetterReuteretal., author = {Hauser, Florian and Schreistetter, Stefan and Reuter, Rebecca and Mottok, J{\"u}rgen and Gruber, Hans and Holmqvist, Kenneth and Schorr, Nick}, title = {Code reviews in C++: Preliminary results from an eye tracking study}, series = {ETRA '20 Short Papers: ACM Symposium on Eye Tracking Research and ApplicationsJune 2020}, booktitle = {ETRA '20 Short Papers: ACM Symposium on Eye Tracking Research and ApplicationsJune 2020}, isbn = {ISBN 9781450371346}, doi = {10.1145/3379156.3391980}, pages = {1 -- 5}, abstract = {Code reviews are an essential part of quality assurance in modern software projects. But despite their great importance, they are still carried out in a way that relies on human skills and decisions. During the last decade, there have been several publications on code reviews using eye tracking as a method, but only a few studies have focused on the performance differences between experts and novices. To get a deeper understanding of these differences, the following experiment was developed: This study surveys expertise-related differences in experts', advanced programmers', and novices' eye movements during the review of eight short C++ code examples, including correct and erroneous codes. A sample of 35 participants (21 novices, 14 advanced and expert programmers) were recruited. A Tobii Spectrum 600 was used for the data collection. Measures included participants' eye movements during the code review, demographic background data, and cued retrospective verbal comments on replays of their own eye movement recordings. Preliminary results give proof for experience-related differences between participants. Advanced and expert programmers performed significantly better in case of error detection and the eye tracking data implies a more efficient reviewing strategy.}, language = {en} } @inproceedings{HayakawaAlFaloujiSchickhuberetal., author = {Hayakawa, Shuhei and Al-Falouji, Ghassan and Schickhuber, Gerald and Mandl, Roland and Yoshida, Takahiro and Hangai, Seiichiro}, title = {A Method of Toothbrush Position Measurement using AR Markers}, series = {2020 IEEE 2nd Global Conference on Life Sciences and Technologies (LifeTech): 10-12 March 2020, Kyoto, Japan}, booktitle = {2020 IEEE 2nd Global Conference on Life Sciences and Technologies (LifeTech): 10-12 March 2020, Kyoto, Japan}, publisher = {IEEE}, doi = {10.1109/LifeTech48969.2020.1570619103}, pages = {91 -- 93}, abstract = {Appropriate daily brushing of the teeth is important for preventing oral diseases. Therefore, a personal assistant for assessing and coaching appropriate toothbrushing is needed. Herein, a three-dimensional toothbrush position measurement method using augmented reality (AR) markers is proposed. The AR markers are detected via a brushing video captured using a smartphone camera. The AR markers are installed on each surface of a dodecahedron attached at the rear end of the toothbrush. This report describes the proposed method, the resulting toothbrush position measurement accuracy, and the optimal number of markers needed for an accurate measurement of the position.}, language = {en} } @incollection{WeberKleine, author = {Weber, Karsten and Kleine, Nadine}, title = {Cybersecurity in Health Care}, series = {The Ethics of Cybersecurity}, volume = {21}, booktitle = {The Ethics of Cybersecurity}, editor = {Christen, Markus and Gordijn, Bert and Loi, Michele}, publisher = {Springer Nature}, address = {Cham, Switzerland}, isbn = {978-3-030-29053-5}, doi = {10.1007/978-3-030-29053-5_7}, pages = {139 -- 156}, abstract = {Ethical questions have always been crucial in health care; the rapid dissemination of ICT makes some of those questions even more pressing and also raises new ones. One of these new questions is cybersecurity in relation to ethics in health care. In order to more closely examine this issue, this chapter introduces Beauchamp and Childress' four principles of biomedical ethics as well as additional ethical values and technical aims of relevance for health care. Based on this, two case studies—implantable medical devices and electronic Health Card—are presented, which illustrate potential conflicts between ethical values and technical aims as well as between ethical values themselves. It becomes apparent that these conflicts cannot be eliminated in general but must be reconsidered on a case-by-case basis. An ethical debate on cybersecurity regarding the design and implementation of new (digital) technologies in health care is essential.}, language = {en} } @article{KopperWestnerStrahringer, author = {Kopper, Andreas and Westner, Markus and Strahringer, Susanne}, title = {From Shadow IT to Business-managed IT: A qualitative comparative analysis to determine configurations for successful management of IT by business entities}, series = {Information Systems and e-Business Management}, volume = {18}, journal = {Information Systems and e-Business Management}, number = {2}, doi = {10.1007/s10257-020-00472-6}, pages = {209 -- 257}, abstract = {Shadow IT describes covert/hidden IT systems that are managed by business entities themselves. Additionally, there are also overt forms in practice, so-called Business-managed IT, which share most of the characteristics of Shadow IT. To better understand this phenomenon, we interviewed 29 executive IT managers about positive and negative cases of Shadow IT and Business-managed IT. By applying qualitative comparative analysis (QCA), we derived four conditions that characterize these cases: Aligned, local, simple, and volatile. The results show that there are three sufficient configurations of conditions that lead to a positive outcome; one of them even encompasses Shadow IT. The most important solution indicates that IT systems managed by business entities are viewed as being positive if they are aligned with the IT department and limited to local requirements. This allows to balance local responsiveness to changing requirements and global standardization. In contrast, IT systems that are not aligned and permanent (and either organization-wide or simple) are consistently considered as negative. Our study is the first empirical quantitative-qualitative study to shed light on the success and failure of Shadow IT and Business-managed IT.}, subject = {Informationsmanagement}, language = {en} } @inproceedings{BrosigWestnerStrahringer, author = {Brosig, Christoph and Westner, Markus and Strahringer, Susanne}, title = {Revisiting the Concept of IT Capabilities in the Era of Digitalization}, series = {2020 IEEE 22nd Conference on Business Informatics (CBI 2020): Antwerp, Belgium, 22-24 June 2020, proceedings}, booktitle = {2020 IEEE 22nd Conference on Business Informatics (CBI 2020): Antwerp, Belgium, 22-24 June 2020, proceedings}, publisher = {IEEE}, doi = {10.1109/CBI49978.2020.00017}, pages = {84 -- 93}, abstract = {In the era of digitalization, companies review how to build competitive advantage drawing on their capabilities. In this context, the paper revisits the concept of IT capabilities. We summarize the "canonical" body of literature to characterize how leading scholars conceptualized and differentiated IT capabilities and then we show how new types of IT capabilities (for example, rising from SMACIT technologies) relate to this. We find that the resource-based view is still leading in how to conceptualize IT capabilities. However, an alternative perspective on IT assets is emerging, looking at it from the angle of digital technologies as stacks. Digital technologies form the foundation for a new technology-driven perspective on IT capabilities. This new view complements the established differentiation of IT capabilities considering IT infrastructure flexibility, IT management, and IT personnel capability. Both perspectives describe the explorative and exploitative nature of IT capabilities. This paper helps scholars and practitioners to clearly distinguish different perspectives of IT capabilities on how to build a competitive advantage from IT today.}, subject = {Informationstechnik}, language = {en} } @incollection{Weber, author = {Weber, Karsten}, title = {Robotik in der Pflege- und Gesundheitsversorgung}, series = {Genese und Folgen der Pflegerobotik}, booktitle = {Genese und Folgen der Pflegerobotik}, number = {196}, editor = {Hergesell, J. and Meister, M. and Maibaum, A.}, publisher = {Beltz/Juventa}, address = {Weinheim}, isbn = {978-3-7799-5243-5}, abstract = {Drei Ver{\"a}nderungen charakterisieren den demografischen Wandel in Deutschland: steigende durchschnittliche Lebenserwartung, der Anteil der Alten und Hochbetagten w{\"a}chst und der Anteil der j{\"u}ngeren Generationen schrumpft. Konsequenzen sind ein Zuwachs chronisch-degenerativer und pflegeintensiver Erkrankungen, ein schrumpfendes Arbeitskr{\"a}ftepotenzial und vor der {\"U}berlastung stehende soziale Sicherungssysteme. Abhilfe soll durch verst{\"a}rkten Technikeinsatz in der Pflege, insbesondere durch Roboter, geleistet werden: Roboter sollen Pflegekr{\"a}fte erg{\"a}nzen oder ersetzen, um dem Pflegenotstand zu begegnen und die Kosten der Pflege zu senken. Damit gehen aber zahlreiche Herausforderungen einher, die nicht zuletzt ethische Fragen ber{\"u}hren: Eine durch Technik bzw. Roboter gest{\"u}tzte Pflege wird diese in ihrem Kern ver{\"a}ndern, Professions- und Menschenbilder werden infrage gestellt und moralische Anspr{\"u}che tangiert. Der Beitrag zeichnet diese Gemengelage nach und skizziert ein diskursethisch ausgerichtetes Verfahren (MEESTAR) zur Aushandlung der Bedingungen f{\"u}r den Robotereinsatz in der Pflege- und Gesundheitsversorgung.}, language = {de} } @inproceedings{AltenbuchnerMueckeHaug, author = {Altenbuchner, Amelie and M{\"u}cke, Vanessa and Haug, Sonja}, title = {Comparing monitoring results of two motion trackers for geriatric patients}, series = {dHealth 2020: biomedical informatics for health and care, proceedings of the 14th Health Informatics Meets Digital Health Conference}, booktitle = {dHealth 2020: biomedical informatics for health and care, proceedings of the 14th Health Informatics Meets Digital Health Conference}, editor = {Schreier, G{\"u}nter}, publisher = {IOS Press}, address = {Amsterdam}, isbn = {978-1-64368-085-9}, doi = {10.3233/SHTI200078}, pages = {77 -- 84}, abstract = {Background: Fitbit and Garmin motion tracker devices are highly used in research. The validity and reliability of these devices is proven for healthy adults between 18 and 64. Objectives: Comparing data output of two devices. Methods: Observational case study on a test track and in the domestic environment of a 80- year-old female multimorbide geriatric patient. Results: High significant correlation of the devices on the test track [r=.776, p≤.001, Bca-CI-95\% (.618;.874), N=33], but significant different in the domestic environment over time (z=4.840, p≤.001). Conclusion: The dominant/non-dominant body side and further sources of error may play a role in monitoring steps with these devices.}, language = {en} } @article{SonarWeber, author = {Sonar, Arne and Weber, Karsten}, title = {KI gestern und heute : Einsichten aus der Fr{\"u}hgeschichte der KI f{\"u}r aktuelle ethische {\"U}berlegungen zum Einsatz von KI in der Medizin}, series = {Arbeit}, volume = {29}, journal = {Arbeit}, number = {2}, doi = {10.1515/arbeit-2020-0009}, pages = {105 -- 122}, abstract = {Der Einzug K{\"u}nstlicher Intelligenz (KI) in die Medizin scheint angesichts der Nutzenpotenziale unvermeidlich. Durch den Agentencharakter KI-basierter Systeme ergeben sich teils neuartige normative An- und Herausforderungen. F{\"u}r den hochgradig sensiblen Anwendungsbereich der Medizin erscheint es daher notwendig, den KI-Einsatz mit ethischen Leitlinien einzuhegen. Dies wirft die Frage auf, auf welche Erfahrungsbasis eine ethische Fundierung des Einsatzes KI-basierter Technik gestellt werden k{\"o}nnte. Damit ist kein Schluss vom Sein auf das Sollen gemeint, sondern die Ber{\"u}cksichtigung bereits gef{\"u}hrter normativer Debatten. Eine M{\"o}glichkeit, sich der normativen Landschaft der KI anzun{\"a}hern, liegt in der Auseinandersetzung mit der Entwicklungsgeschichte der KI und den damit verbundenen Debatten um ethische und soziale Aspekte. Mit diesem explorativen Ansatz k{\"o}nnen relevante Problemfelder identifiziert, vorl{\"a}ufige Gestaltungs- und Einsatzempfehlungen f{\"u}r KI-Systeme in der Praxis formuliert und Vorschl{\"a}ge zu deren Einbettung in existierende Organisationsstrukturen generiert werden.}, language = {de} } @incollection{FrikelHaltmeier, author = {Frikel, J{\"u}rgen and Haltmeier, Markus}, title = {Sparse Regularization of Inverse Problems by Operator-Adapted Frame Thresholding}, series = {Mathematics of Wave Phenomena}, booktitle = {Mathematics of Wave Phenomena}, editor = {D{\"o}rfler, Willy and Hochbruck, Marlis and Hundertmark, Dirk and Reichel, Wolfgang and Rieder, Andreas}, edition = {1st ed.}, publisher = {Birkh{\"a}user; Springer International Publishing}, address = {Cham}, isbn = {978-3-030-47173-6}, doi = {10.1007/978-3-030-47174-3_10}, pages = {163 -- 178}, abstract = {We analyze sparse frame based regularization of inverse problems by means of a diagonal frame decomposition (DFD) for the forward operator, which generalizes the SVD. The DFD allows to define a non-iterative (direct) operator-adapted frame thresholding approach which we show to provide a convergent regularization method with linear convergence rates. These results will be compared to the well-known analysis and synthesis variants of sparse ℓ1-regularization which are usually implemented thorough iterative schemes. If the frame is a basis (non-redundant case), the three versions of sparse regularization, namely synthesis and analysis variants of ℓ1-regularization as well as the DFD thresholding are equivalent. However, in the redundant case, those three approaches are pairwise different.}, language = {en} }