@masterthesis{Blauert2023, type = {Bachelor Thesis}, author = {Blauert, Derk-Janko}, title = {Bewertung des Potentials von Network Access Control (NAC) f{\"u}r die Netzwerksicherheit in modernen IT-Umgebungen mittels vergleichender Betrachtung der beiden Produkte PacketFence und macmon}, publisher = {Technische Hochschule Brandenburg}, address = {Brandenburg an der Havel}, doi = {10.25933/opus4-2951}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:522-opus4-29514}, school = {Technische Hochschule Brandenburg}, pages = {80}, year = {2023}, abstract = {In der heutigen digitalisierten Welt spielt die Sicherheit von IT-Infrastrukturen eine entscheidende Rolle. Diese Bachelorarbeit untersucht das Potenzial von Network Access Control (NAC) als eine IT-L{\"o}sung zur Verbesserung der Netzwerksicherheit in modernen IT-Umgebungen. Dabei steht die Zugriffskontrolle von Personen und Ger{\"a}ten im Vordergrund. Damit soll erreicht werden, dass unautorisierter Zugriff zum Netzwerk verhindert wird. Es werden die Begrifflichkeiten, Funktionsweise und potenzielle Angriffsvektoren von NAC untersucht. Des Weiteren werden die jeweiligen Funktionen der NAC-Produkte macmon und der Open-Source L{\"o}sung PacketFence gegen{\"u}bergestellt. Im praktischen Teil der Arbeit werden dann die vorgestellten Angriffsvektoren an einem Test-Netzwerk durchgef{\"u}hrt und analysiert. Die Arbeit zeigt, dass NAC eine wichtige Komponente in der Zugriffskontrolle f{\"u}r eine moderne IT-Infrastruktur ist. W{\"a}hrend einige Angriffe auf das Test-Netzwerk abgewehrt werden konnten, war es dennoch m{\"o}glich, sich als Angreifer am Netzwerk anzumelden. NAC ist ein unerl{\"a}ssliches Tool f{\"u}r gr{\"o}ßere IT-Infrastrukturen, jedoch erfordert eine korrekte Konfiguration und effektive Nutzung von NAC ein umfangreiches Wissen {\"u}ber die verschiedenen Aspekte und Themenbereiche der Netzwerksicherheit.}, subject = {Informationssicherheit}, language = {de} } @techreport{Schugardt2023, author = {Schugardt, Alexander}, title = {Untersuchung der Rotorfestigkeit von permanenterregten Synchronmaschinen mit vergrabenen Magneten}, publisher = {Technische Hochschule Brandenburg}, address = {Brandenburg an der Havel}, doi = {10.25933/opus4-2961}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:522-opus4-29610}, pages = {34}, year = {2023}, abstract = {Diese Projektarbeit behandelt die mechanische Simulation der Rotoren von permanenterregten Synchronmaschinen f{\"u}r den Festigkeitsnachweis. Hierzu wird die Finite-Elemente-Methode mit dem Programm CalculiX verwendet. Als Beispiel wird der Elektromotor des Toyota Prius II im Detail betrachtet. Hierbei werden die unterschiedlichen Lasten modelliert, dazu z{\"a}hlen neben der Zentrifugalkraft auch der Innendruck durch eine Presspassung sowie die elektromagnetischen Kr{\"a}fte. F{\"u}r die Modellierung von Kr{\"a}ften auf der Rotoroberfl{\"a}che wird eine Methodik zur Umsetzung in CalculiX entwickelt und anhand eines Beispielmodells demonstriert. Der angestrebte Festigkeitsnachweis kann im Rahmen dieser Arbeit erbracht werden. Weiterhin wird gezeigt, dass der Einfluss der elektromagnetischen Kr{\"a}fte im Arbeitspunkt mit der h{\"o}chsten Drehzahl sehr gering ausf{\"a}llt. Insgesamt bietet diese Arbeit die Grundlagen f{\"u}r mechanische Modellierungen von Rotoren unter Ber{\"u}cksichtigung aller Kr{\"a}fte. Dies kann direkt auf andere Elektromotoren angewendet werden.}, subject = {Rotor }, language = {de} } @masterthesis{Kenfack2023, type = {Bachelor Thesis}, author = {Kenfack, Divine Leopold}, title = {Erh{\"o}hung der Phishing-Resistenz von Anmeldeverfahren durch Einsatz von FIDO2 und Passkey}, publisher = {Technische Hochschule Brandenburg}, address = {Brandenburg an der Havel}, doi = {10.25933/opus4-2968}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:522-opus4-29688}, school = {Technische Hochschule Brandenburg}, pages = {56}, year = {2023}, abstract = {In dieser Forschung wird es gezeigt, wie sicher und benutzerfreundlich eine Authentifizierung mit Passkey/FIDO2 auf Ebene des Web-Browsers ist, im Vergleich zu einer Authentifizierung mit einem starken Passwort oder eine Authentifizierung aus einer Kombination von einem Passwort und einer Zwei-Faktor-Authentifizierung.}, subject = {Authentifizierung}, language = {de} } @incollection{SeyerleinKlugAdler2023, author = {Seyerlein-Klug, Annegrit and Adler, Rasmus}, title = {4.2.: Sicherheit}, series = {Deutsche Normungsroadmap K{\"u}nstliche Intelligenz}, booktitle = {Deutsche Normungsroadmap K{\"u}nstliche Intelligenz}, editor = {Wahlster, Wolfgang and Winterhalter, Christoph}, edition = {2}, publisher = {DKE - Deutsche Kommission Elektrotechnik Elektronik Informationstechnik in DIN und VDE}, address = {Berlin/Offenbach am Main}, pages = {105 -- 120}, year = {2023}, language = {de} } @article{Uhl2023, author = {Uhl, Roland}, title = {Charakterisierung des Erwartungswertes am Graphen der Verteilungsfunktion}, publisher = {Technische Hochschule Brandenburg}, address = {Brandenburg an der Havel}, doi = {10.25933/opus4-2986}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:522-opus4-29862}, pages = {10}, year = {2023}, abstract = {Der Erwartungswert einer Zufallsgr{\"o}ße kann generell am Graphen ihrer Verteilungsfunktion durch eine naheliegende Gleichheit zweier Fl{\"a}cheninhalte festgelegt werden. {\"A}quivalent dazu l{\"a}sst er sich mit zwei uneigentlichen Riemann-Integralen darstellen. Davon ausgehend werden die Tschebyschow-Ungleichung und ihre Modifikation mit strikten Ungleichheitszeichen hergeleitet.}, subject = {Verteilungsfunktion}, language = {de} } @inproceedings{GrunwaldSchwillSassenberg2023, author = {Grunwald, Guido and Schwill, J{\"u}rgen and Sassenberg, Anne-Marie}, title = {How to Choose the Fitting Partner in Sustainability Sponsorship? A Decision Model Integrating Multiple Fit Dimensions}, series = {Konferenz: 2021 AMS Virtual Annual Conference and World Marketing Congress, 2022/ Band: Celebrating the Past and Future of Marketing and Discovery with Social Impact 2021 AMS Virtual Annual Conference and World Marketing Congress}, booktitle = {Konferenz: 2021 AMS Virtual Annual Conference and World Marketing Congress, 2022/ Band: Celebrating the Past and Future of Marketing and Discovery with Social Impact 2021 AMS Virtual Annual Conference and World Marketing Congress}, publisher = {Springer Cham}, isbn = {978-3-030-95345-4}, doi = {10.1007/978-3-030-95346-1_157}, pages = {465 -- 477}, year = {2023}, language = {en} } @article{MaurerEifertAnnan2023, author = {Maurer, Robert and Eifert, Felix Friedrich and Annan, Tarek}, title = {Remote Work in Kooperationsprojekten - Fluch oder Segen?!}, series = {Mittelstand-Digital Magazin - Wissenschaft trifft Praxis}, journal = {Mittelstand-Digital Magazin - Wissenschaft trifft Praxis}, number = {19/9}, publisher = {Begleitforschung Mittelstand-Digital WIK GmbH}, issn = {2198-8544}, pages = {15 -- 20}, year = {2023}, abstract = {Der vorliegende Beitrag befasst sich mit den Herausforderungen, die im Rahmen von Remote Work in Kooperationen bez{\"u}glich der Informations- und IT-Sicherheit bestehen, insbesondere im Hinblick auf den sicheren Datenaustausch. Des Weiteren wird die Wichtigkeit einer ganzheitlichen Sicht von IT-Governance-, Risiko- und Compliance-Management in Verb{\"u}nden kleiner und mittlerer Unternehmen (KMU) behandelt. Weiterhin wird aufgezeigt, was bei der informationstechnischen Absicherung von Kooperationen und IT-Konsortien beachtet werden sollte.}, language = {de} } @misc{DasChaurasiaMandaletal.2023, author = {Das, Atanu and Chaurasia, Prashtan Kumar and Mandal, Gopi K. and Goecke, Sven-Frithjof and De, Amitava}, title = {Sample calculations to estimate joint distortion based on the published article "Analytical Estimation of Thermomechanical Distortion and Interface Layer Thickness for Gas Metal Arc Lap Joining of Dissimilar Sheets"}, year = {2023}, abstract = {A sample set of calculations is presented in this supplemental document to analytically estimate joint distortion for gas metal arc lap joining of aluminum and steel thin sheets following the published article "Analytical Estimation of Thermomechanical Distortion and Interface Layer Thickness for Gas Metal Arc Lap Joining of Dissimilar Sheets"}, language = {en} } @article{DasChaurasiaMandaletal.2023, author = {Das, Atanu and Chaurasia, Prashtan Kumar and Mandal, Gopi K. and Goecke, Sven-Frithjof and De, Amitava}, title = {Analytical estimation of thermomechanical distortion and interface layer thickness for gas metal arc lap joining of dissimilar sheets}, series = {Welding in the World}, journal = {Welding in the World}, number = {76/2023}, publisher = {Springer Link}, issn = {432288}, doi = {10.1007/s40194-01426-x}, pages = {33 -- 49}, year = {2023}, language = {en} } @article{ChaurasiaGoeckeDe2023, author = {Chaurasia, Prashtan Kumar and Goecke, Sven-Frithjof and De, Amitava}, title = {Monitoring melt pool asymmetry in gas metal arc-directed energy deposition}, series = {Science and Technology of Welding and Joining}, journal = {Science and Technology of Welding and Joining}, number = {Augabe 5/ Band 28}, publisher = {Taylor and Fracis}, issn = {1362-1718 (PRINT)}, doi = {10.1080/13621718.2023.2168933}, pages = {424 -- 432}, year = {2023}, language = {en} } @article{ChaurasiaGoeckeDe2023, author = {Chaurasia, Prashant Kumar and Goecke, Sven Frithjof and De, Amitava}, title = {Towards real-time monitoring of metal transfer and melt pool temperature field in gas metal arc directed energy deposition}, series = {Welding in the World}, journal = {Welding in the World}, number = {67}, publisher = {Springer Link}, doi = {https://doi.org/10.1007/s40194-023-01534-2}, pages = {1781 -- 1791}, year = {2023}, abstract = {Large three-dimensional metallic parts can be printed layer-by-layer using gas metal arc directed energy deposition (GMA-DED) process at a high deposition rate and with little or no material wastage. Fast responsive real-time monitoring of GMA-DED process signatures and their transient variations is required for printing of dimensionally accurate and structurally sound parts. A systematic experimental investigation is presented here on multi-layer GMA-DED with two different scanning strategies using a high strength low alloy (HSLA) filler wire. The dynamic metal transfer, melt pool temperature field and its longitudinal cross-section, and arc voltage and current are monitored synchronously. The transient arc heat input and the melt pool solidification cooling rate are estimated from the monitored signals. The layer-wise variations of the melt pool dimension, surface temperature profile, thermal cycles, and solidification cooling rate are examined for different scanning strategies. It is comprehended that the part defects can be minimized, and the mass production of zero-defect parts can be achieved in GMA-DED process with synchronized monitoring and assessment of the real-time process signatures.}, language = {en} } @article{RevinaAksu2023, author = {Revina, Aleksandra and Aksu, {\"U}nal}, title = {An approach for analyzing business process execution complexity based on textual data and event log}, series = {Information Systems}, journal = {Information Systems}, number = {114}, publisher = {Elsevier}, doi = {10.1016/j.is.2023.102184}, year = {2023}, abstract = {With the advent of digital transformation, organizations increasingly rely on various information systems to support their business processes (BPs). Recorded data, including textual data and event log, expand exponentially, complicating decision-making and posing new challenges for BP complexity analysis in Business Process Management (BPM). Herein, Process Mining (PM) serves to derive insights based on historic BP execution data, called event log. However, in PM, textual data is often neglected or limited to BP descriptions. Therefore, in this study, we propose a novel approach for analyzing BP execution complexity by combining textual data serving as an input at the BP start and event log. The approach is aimed at studying the connection between complexities obtained from these two data types. For textual data-based complexity, the approach employs a set of linguistic features. In our previous work, we have explored the design of linguistic features favorable for BP execution complexity prediction. Accordingly, we adapt and incorporate them into the proposed approach. Using these features, various machine learning techniques are applied to predict textual data-based complexity. Moreover, in this prediction, we show the adequacy of our linguistic features, which outperformed the linguistic features of a widely-used text analysis technique. To calculate event log-based complexity, the event log and relevant complexity metrics are used. Afterward, a correlation analysis of two complexities and an analysis of the significant differences in correlations are performed. The results serve to derive recommendations and insights for BP improvement. We apply the approach in the IT ticket handling process of the IT department of an academic institution. Our findings show that the suggested approach enables a comprehensive identification of BP redesign and improvement opportunities.}, language = {en} } @incollection{RevinaRizunAksu2023, author = {Revina, Aleksandra and Rizun, Nina and Aksu, {\"U}nal}, title = {Towards a Framework for Context Awareness Based on Textual Process Data: Case Study Insights}, series = {Lecture Notes in Business Information Processing}, booktitle = {Lecture Notes in Business Information Processing}, number = {466}, publisher = {Springer Cham}, isbn = {978-3-031-26885-4 (Print) 978-3-031-26886-1 (online)}, doi = {https://doi.org/10.1007/978-3-031-26886-1_2}, year = {2023}, abstract = {Context awareness is critical for the successful execution of processes. In the abundance of business process management (BPM) research, frameworks exclusively devoted to extracting context from textual process data are scarce. With the deluge of textual data and its increasing value for organizations, it becomes essential to employ relevant text analytics techniques to increase the awareness of process workers, which is important for process execution. The present paper addresses this demand by developing a framework for context awareness based on process executions-related textual data using a well-established layered BPM context model. This framework combines and maps various text analytics techniques to the layers of the context model, aiming to increase the context awareness of process workers and facilitate informed decision-making. The framework is applied in an IT ticket processing case study. The findings show that contextual information obtained using our framework enriches the awareness of process workers regarding the process instance urgency, complexity, and upcoming tasks and assists in making decisions in terms of these aspects.}, language = {en} } @book{Tanski2023, author = {Tanski, Joachim}, title = {Compliance-Management}, edition = {1}, publisher = {Springer Gabler Wiesbaden}, isbn = {978-3-658-40681-3 (Softcover) 978-3-658-40682-0 (e-Book)}, doi = {https://doi.org/10.1007/978-3-658-40682-0}, pages = {63}, year = {2023}, abstract = {Dieses Buch bietet eine komprimierte und praxisorientierte Einf{\"u}hrung in die Grundlagen und Anforderungen eines Compliance-Managements, um den Leser schnell mit aktuellen und zentralen Regelungen vertraut zu machen. Dabei wird auf gesetzliche und regulatorische Bestimmungen ebenso eingegangen wie auf betriebswirtschaftliche Notwendigkeiten, um Mitarbeitende und Unternehmen vor den schwerwiegenden Folgen von Compliance-Verst{\"o}ßen zu sch{\"u}tzen.}, language = {de} } @incollection{Tanski2023, author = {Tanski, Joachim}, title = {Limitierende Faktoren}, series = {Compliance-Management}, booktitle = {Compliance-Management}, publisher = {Springer ebooks}, doi = {10.1007/978-3-658-40682-0_4}, pages = {49 -- 49}, year = {2023}, abstract = {Wie bei allen Risiken gibt es auch bei Compliance-Risiken kein Null-Risiko. Man wird in der Praxis noch nicht einmal in die unmittelbare N{\"a}he einer Null kommen. Ein Null-Compliance-Risiko ist auch deshalb nicht erreichbar, weil sich st{\"a}ndig neue Risikofelder auftun. So beispielsweise durch {\"A}nderung von Gesch{\"a}ftsmodellen oder Vertriebswegen oder durch neue rechtliche Rahmenbedingen.}, language = {de} } @incollection{BurgerMenzel2023, author = {Burger-Menzel, Bettina}, title = {Wirtschaftsf{\"o}rderung und E-Governance: Von der Resilienz zur Transformation?}, series = {Wirtschaftsf{\"o}rderung in der Krise}, booktitle = {Wirtschaftsf{\"o}rderung in der Krise}, publisher = {Springer Gabler}, address = {Wiesbaden}, doi = {10.1007/978-3-658-41390-3_10}, pages = {171 -- 196}, year = {2023}, abstract = {Unsere Welt ver{\"a}ndert sich in unterschiedlichen Tempi und Verwerfungstiefen. Dies ist das einzig Verl{\"a}ssliche f{\"u}r Wirtschaft und Gesellschaft. Zum einen z{\"a}hlt die kreative Zerst{\"o}rung zum ‚Markenkern' marktwirtschaftlicher Systeme. Die Wirtschaftsakteure stehen dadurch an ihrem jeweiligen Standort unter einer Art (produktivem) Dauerstress. Es gibt Gewinner und Verlierer, weil Wettbewerber unterschiedlich erfolgreich kostensenkende Rationalisierungen, technischen Fortschritt und die Erschließung neuer (globaler) M{\"a}rkte realisieren. Der damit einhergehende Strukturwandel gilt als wirtschaftssystemischer Normalzustand. Zum anderen gibt es Krisen. Und auch ‚unter Schock' (re-)agieren Akteure ungleich, wie die Corona-Pandemie oder abrupte Ver{\"a}nderungen durch die Finanzkrise zeigen. Einige Akteure und Standorte bleiben mit ihrem jeweiligen Profil und Potenzial (weiterhin) produktiv widerstandsf{\"a}hig. F{\"u}r andere versch{\"a}rfen sich der wirtschaftliche Niedergang und dessen Folgen f{\"u}r die Arbeitsm{\"a}rkte und Lebensqualit{\"a}t der Betroffenen. Regionale Wirtschaftsf{\"o}rderung unterst{\"u}tzt, dass sich die Wirtschaftsstrukturen an einem Standort {\"u}berlebensf{\"a}hig ausrichten. Doch kann sie auch beim Umgang mit Krisen einen Mehrwert erzielen und z{\"a}hlt dies {\"u}berhaupt zu ihrem Regelauftrag? Und welche Rolle spielt die Digitalisierung? Der Beitrag stellt den sachlogischen Zusammenhang zwischen diesen Teilfragen her und ordnet neuere Ans{\"a}tze ein. Zudem werden Ansatzstellen aufgezeigt, um die regionale Wirtschaftsf{\"o}rderung praxisorientiert weiterzuentwickeln. ‚Electronic Government' (E-Government) beschreibt dabei den Einsatz von Informationstechnik, Telekommunikation und Medien (ITKM) im {\"o}ffentlichen Sektor, w{\"a}hrend ‚Electronic Governance' (E-Governance) hybride oder private Akteure miteinbezieht. Der Beitrag ist wie folgt strukturiert: Zun{\"a}chst werden Schl{\"u}sselbegriffe wie Strukturpolitik und Resilienz gekl{\"a}rt und mit den Kontextfaktoren verkn{\"u}pft, welche die Steuerungslogik von Wirtschaftsf{\"o}rderung bestimmen. Danach wird diskutiert, inwiefern die Wirtschaftsf{\"o}rderung E-Government und E-Governance nutzen kann, um Resilienz zu st{\"a}rken und m{\"o}glichst transformativ wirken zu k{\"o}nnen.}, language = {de} } @inproceedings{FitzVeldyaevaTeutenbergetal.2023, author = {Fitz, Lukas R. G. and Veldyaeva, Ekaterina and Teutenberg, Lukas and Scheeg, Michaela and Scheeg, Jochen}, title = {Puzzle away the Puzzledness: Action-Design Study of an Educational Escape Room for Intervention in SMEs' Perception towards ICT Adoption}, series = {Konferenz: 57th Hawaii International Conference on System Sciences (HICSS); Honolulu, HI, USA}, booktitle = {Konferenz: 57th Hawaii International Conference on System Sciences (HICSS); Honolulu, HI, USA}, isbn = {978-0-9981331-7-1}, pages = {5347 -- 5356}, year = {2023}, abstract = {Digital transformation initiatives in small and medium-sized enterprises (SME) are often hampered by individual practitioners' perceptions of information and communication technology (ICT). This research employs an educational escape room (ER) game for an intervention towards informed decision-making on ICT adoption in SMEs. ER design and implementation are elaborated and consequently tested with SME practitioners, all embedded in an action-design study based on a qualitative research methodology. The result highlights a trade-off between creating immersive game experiences and achieving learning objectives. Still, the outcome implies an impact on players' perception of ICT integrated in the ER. The findings contribute to the emerging field of serious games for learning and shed light on the potential of game-based interventions for SMEs.}, language = {en} } @inproceedings{Kramann2023, author = {Kramann, Guido}, title = {AOGscript - Design of a Stand-Alone Scripting Language for the Generation of Music. Proceedings of the International Symposium on Ubiquitous Music, 2023}, series = {Konferenz: 13th International Symposium on Ubiquitous Music 2023 (Ubimus23) , Ulster University, Derry~Londonderry, Northern Ireland, 2-4 November, 2023}, booktitle = {Konferenz: 13th International Symposium on Ubiquitous Music 2023 (Ubimus23) , Ulster University, Derry~Londonderry, Northern Ireland, 2-4 November, 2023}, publisher = {Zenodo}, isbn = {978-65-00-85069-7}, doi = {10.5281/zenodo.10670220}, pages = {95 -- 109}, year = {2023}, abstract = {Ubiquitous Music is an interdisciplinary research area that combines methodologies from music, computer science, education, creativity studies, human sciences and engineering. The Ubiumus 2023 symposium, held at Ulster University and North West Regional College in Derry~Londonderry, Northern Ireland, included contributions on the following topics: Rapid Prototyping and Live Environments Ecological Approaches to Ubiquitous Music Ubiquitous Music Creative Practices, Tools and Influences The symposium also included a number of artistic contributions and workshops, which are also discussed in the proceedings volume. A number of events (including all paper presentations, an invited lecture, a panel discussion, and a keynote and associated performance) were also documented via video, with a link available in this Proceedings volume.}, language = {en} } @unpublished{Tarassow2023, author = {Tarassow, Artur}, title = {The potential of LLMs for coding with low-resource and domain-specific programming languages}, doi = {10.48550/arXiv.2307.13018}, pages = {1 -- 27}, year = {2023}, abstract = {This paper presents a study on the feasibility of using large language models (LLM) for coding with low-resource and domain-specific programming languages that typically lack the amount of data required for effective LLM processing techniques. This study focuses on the econometric scripting language named hansl of the open-source software gretl and employs a proprietary LLM based on GPT-3.5. Our findings suggest that LLMs can be a useful tool for writing, understanding, improving, and documenting gretl code, which includes generating descriptive docstrings for functions and providing precise explanations for abstract and poorly documented econometric code. While the LLM showcased promoting docstring-to-code translation capability, we also identify some limitations, such as its inability to improve certain sections of code and to write accurate unit tests. This study is a step towards leveraging the power of LLMs to facilitate software development in low-resource programming languages and ultimately to lower barriers to entry for their adoption.}, language = {en} } @inproceedings{Guido2023, author = {Guido, Kramann}, title = {AOGscript, Generative Code as Conceptual Artwork: Giving Space to Astonishment. Proceedings of xCoAx 2023}, series = {Konferenz: xCoAx 2023 11th Conference on Computation, Communication, Aesthetics \& X}, booktitle = {Konferenz: xCoAx 2023 11th Conference on Computation, Communication, Aesthetics \& X}, publisher = {i2ADS}, address = {Porto, Portugal}, isbn = {978-989-9049-52-9}, doi = {10.34626/xcoax.2023}, pages = {401 -- 408}, year = {2023}, language = {en} } @unpublished{BaevaBrunnerElmasetal.2023, author = {Baeva, Gergana and Brunner, Robert and Elmas, Filiz and Fresz, Benjamin and Fuß, Christine and Heß, Claudia and Kellmeyer, Philipp and Mahner, Malin and Paulheim, Heiko and Poretschkin, Maximilian and Puntschuh, Michael and Seyerlein-Klug, Annegrit}, title = {Welche Zertifizierung ist hilfreich f{\"u}r Verbraucher*innen?}, doi = {10.24406/publica-2132}, year = {2023}, abstract = {In diesem Whitepaper fokussieren wir uns auf die KI-Verordnung nicht erfasste freiwillige Zertifizierung. Dabei stehen die Interessen und Sichtweisen der Verbraucher*innen im Vordergrund. Als Verbraucher*innen betrachten wir nicht nur die unmittelbaren Nutzer*innen von KI-Systemen, sondern auch Privatpersonen, die indirekt von KI-Ergebnissen betroffen sein k{\"o}nnen. Zudem ber{\"u}cksichtigen wir Menschen in der Rolle als souver{\"a}ne Datensubjekte, deren personenbezogene Daten in die Entwicklung von KI-Systemen einfließen. Dieses breite Verst{\"a}ndnis des Verbraucher*innenbegriffs entspricht dem Selbstverst{\"a}ndnis des Zentrums f{\"u}r vertrauensw{\"u}rdige K{\"u}nstliche Intelligenz (ZVKI). Wir stellen Thesen auf, wie freiwillige Zertifizierungen von KI-Systemen f{\"u}r Verbraucher*innen n{\"u}tzlich sein k{\"o}nnen. Die im Verlauf vorgestellten und begr{\"u}ndeten acht Thesen wurden in einer Reihe von interdisziplin{\"a}ren Workshops erarbeitet. Dabei identifizierten wir Herausforderungen einer KI-Zertifizierung aus Verbraucher*innensicht und pr{\"a}zisierten diese iterativ. Die Gruppendiskussionen dienten als Grundlage dieses Whitepapers und bauten auf Erkenntnissen der Fach-Arbeitsgruppe „KI Zertifizierung" des ZVKI auf. Alle Co-Autor*innen waren an der Erstellung des finalen Texts beteiligt. Die aufgestellten Thesen thematisieren grundlegende Anforderungen an eine KI-Zertifizierung aus einer {\"u}bergeordneten Perspektive, unabh{\"a}ngig von den spezifischen Details einer KI-Anwendung. Somit liefern sie keine Aussagen zu konkreten Inhalten der Zertifizierung. Detaillierte Empfehlungen setzen eine umfassende Analyse von Einsatzf{\"a}llen voraus, die in diesem Rahmen nicht geleistet werden kann.}, language = {de} } @techreport{OlschewskiBluhmFirnkornetal.2023, author = {Olschewski, Detlef and Bluhm, Andr{\´e} and Firnkorn, Joerg and Lucieri, Adriano and Palacio, Sebastian and Streppel, Yeji and Zednik, Carlos and G{\"o}rge, Rebekka and Poretschkin, Maximilian and Becker, Nikolas and Zielke, Thomas and Kruschel, Christian and Neumann-Brosig, Matthias and B{\"a}uerle, Stephen and Eifert, Marton and L{\´o}pez, Erik Martori and Assion, Felix and Seyerlein-Klug, Annegrit and Schmid, Ute and Haufe, Stefan and Gautier, Antoine and Bieringer, Lukas and Besold, Tarek R. and Cremers, Armin B.}, title = {DIN SPEC 92001-3 Artificial Intelligence - Life Cycle Processes and Quality Requirements - Part 3: Explainability}, publisher = {Beuth Verlag}, pages = {24}, year = {2023}, abstract = {DIN SPEC 92001-3 Artificial Intelligence - Life Cycle Processes and Quality Requirements. Artificial Intelligence has become a game-changer, but its impact must be approached responsibly. This is the third document in a series, and it aims to ensure that AI systems are developed, deployed, and used efficiently, responsibly, and in a trustworthy way. It focuses on "Explainability" - the ability to understand how AI makes decisions. This DIN SPEC 92001-3 provides a domain-independent guide on promoting explainability throughout the AI system's life cycle. It tackles "opacity", describing sources and effects of opacity in AI and how explanations can mitigate them. The goal is to foster a better understanding and effective use of Explainable AI across various applications, fostering principles of trust and transparency in AI-based systems. This DIN SPEC is the result of „Zertifizierung von Standard-KI-Anwendungen (Zertifizierte KI project)" https://www.zertifizierte-ki.de/. The publication is available for free at Beuth Verlag GmbH www.beuth.de - plus the search for "DIN SPEC 92001-3"}, language = {en} } @inproceedings{VeldyaevaFitzScheeg2023, author = {Veldyaeva, Ekaterina and Fitz, Lukas R. G. and Scheeg, Jochen}, title = {Developing Digital Competencies in Small and Medium-Sized Enterprises Through Microlearning Applications: A Research Agenda}, series = {Konferenz: Perspectives in Business Informatics Research 22nd International Conference on Business Informatics Research, BIR 2023, Ascoli Piceno, Italy, September 13-15, 2023, Proceedings}, booktitle = {Konferenz: Perspectives in Business Informatics Research 22nd International Conference on Business Informatics Research, BIR 2023, Ascoli Piceno, Italy, September 13-15, 2023, Proceedings}, doi = {10.1007/978-3-031-43126-5_7}, pages = {41 -- 58}, year = {2023}, abstract = {This article presents a research outline on the use of microlearning applications to develop digital competencies in Small and Medium-sized Enter-prises (SMEs). The digital transformation of businesses has become essential for their survival, and SMEs need to develop digital competencies (DC) to remain competitive in the market. Microlearning (ML), a form of learning that involves small, bite-sized learning modules, has been gaining popularity in recent years as a way to efficiently and effectively develop skills. Through a semi-systematic literature review approach, our study examines prevalent knowledge in the area of ML and DC and discusses interrelations. As a result, we propose a research roadmap consisting of six research questions targeting four dimensions of ML for DC development in SMEs: 1) context, 2) formats, 3) reward system, and 4) complexity level.}, language = {en} } @inproceedings{LemkeMeisterWessels2023, author = {Lemke, Claudia and Meister, Vera and Weßels, Doris}, title = {Kritische Reflexion und Handlungsans{\"a}tze zum Einsatz Generativer KI in der Wirtschaftsinformatik-Lehre}, series = {36. Jahrestagung des Arbeitskreises Wirtschaftsinformatik (AKWI)}, booktitle = {36. Jahrestagung des Arbeitskreises Wirtschaftsinformatik (AKWI)}, pages = {16}, year = {2023}, abstract = {Die digitalen Technologien ver{\"a}ndern die Gesellschaft, auch die akademischen Wissen-schaftssysteme sind betroffen. Das erfordert verst{\"a}rkte {\"U}berlegungen zum Einsatz solcher Techno-logien und zu ihrem Einfluss auf Lehre und Studium. Der Beitrag fokussiert die Relevanz von AI-Literacy im Kontext des Einsatzes Generativer KI aus zwei Perspektiven. Zun{\"a}chst wird die Wahr-nehmung und Bereitschaft von Studierenden, KI-basierte Tools zur automatisierten Textgenerierung zu nutzen, empirisch untersucht. Im zweiten Teil wird ein auf Ko-Kreation ausgerichtetes Lehrkon-zept modelliert, das neben fachlichen auch AI-Literacy-Kompetenzen adressiert. Die Ergebnisse f{\"u}hren zu Handlungsans{\"a}tzen, insbesondere f{\"u}r Wirtschaftsinformatik-Studieng{\"a}nge.}, language = {de} } @inproceedings{MarkgrafDietrichMuelleretal.2023, author = {Markgraf, Klaus and Dietrich, Benjamin and M{\"u}ller, Katja and Flassig, Robert J and Flassig, Peter Michael}, title = {FINEconcepts - Wissenstransfer und Energiesystemoptimierung mithilfe des digitalen Zwillings}, series = {Konferenz: NWK 2023, HS Harz}, booktitle = {Konferenz: NWK 2023, HS Harz}, pages = {428 -- 435}, year = {2023}, abstract = {Climate change, but also geopolitical circumstances, are moving topics such as energy efficiency and renewable energies more and more into the focus of the population, economy , and politics. As a result, the will to optimize new and existing energy systems extends from private individuals to companies and even entire communities. This work describes the development and usage of a new software called FINEconcepts which creates a digital twin of an energy system. This virtual model can then be used to optimize the energy system based on annual costs, CO2 emissions or other relevant criteria such as self-sufficiency. Because all system components, which include renewable technologies as well, can be added as a building block with chosen but changeable parameters, the software allows the user to explore and awaken interest and understanding of technologies that were previously considered too costly, irrelevant, or unrealistic. Implemented projects in small and large companies as well as in residential areas did prove, that the usage of FINEconcepts leads not only to more efficient energy systems by increasing the use of renewable energy, but also increased knowledge and understanding in terms of energy. Besides economics, ecology and security, understanding is an equally important factor in achieving a sustainable energy supply.}, language = {de} } @book{Brasche2023, author = {Brasche, Ulrich}, title = {Climate justice and the Global South - The road to solving climate change}, publisher = {Books on Demand}, isbn = {Print 9783758302381}, pages = {172}, year = {2023}, abstract = {Climate will be decided in the global south Mankind is on a dangerous journey in the Anthropocene. Arriving at a good life for all within planetary boundaries is still possible. But at present, the journey is more likely to lead to an overheating of the Earth. Health and life would then be massively endangered for many living beings - including humans. A positive development is still possible, but it requires a global transformation of the economy and society. The prosperous states and companies are well advised, to respect the interests of the global south and future generations, and to use wisely the considerable financial resources in a cooperation of equals. This book • highlights past carbon emissions and their consequences, • reflects on the main drivers of future emissions, • discusses strategies like green growth, de-growth, • presents market-based instruments like carbon trading and carbon border adjustment and • emphasises the key role played by the emerging countries of the global south. It is not only a matter of justice but furthermore in the interest of the rich countries in the global north to contribute massively to financing a "green leapfrogging" of the global south into a carbon-free prosperity. Failing to achieve it will bring unspeakable losses and suffering to many people all over the planet.}, language = {en} } @incollection{FitzScheeg2023, author = {Fitz, Lukas R. G. and Scheeg, Jochen}, title = {Small Businesses Participating in Digital Platform Ecosystems - A Descriptive Literature Review}, series = {Digital Transformation. PLAIS EuroSymposium 2023. Lecture Notes in Business Information Processing}, booktitle = {Digital Transformation. PLAIS EuroSymposium 2023. Lecture Notes in Business Information Processing}, doi = {10.1007/978-3-031-43590-4_3}, year = {2023}, abstract = {The emergence of digital multi-sided platforms has disrupted day-to-day business in many industries. Nowadays, many small businesses participate in digital platform (DP) ecosystems and act as value creators or complementors. Investigating the small business perspective does not have a rich tradition in platform research yet. In response, this paper presents a systematic literature review (SLR) analyzing the thematic points of focus and highlighting new avenues for information systems and small business research. We find that objectives related to digital transformation, digital strategy- and business model-development, and DP adoption are fundamental topics in the conjunction of small business and DP ecosystems. Based on the findings, an agenda for future research is developed, including propositions for practice-oriented and human-centered approaches fostering sustilience, innovation capabilities and digital leadership competencies in small businesses facing DP ecosystem participation.}, language = {en} } @inproceedings{FitzScheeg2023, author = {Fitz, Lukas R. G. and Scheeg, Jochen}, title = {What is Digital about Digital Innovation? An Ontological Discussion of Digitality}, series = {Konferenz: 29th Americas Conference on Information Systems}, booktitle = {Konferenz: 29th Americas Conference on Information Systems}, publisher = {Panama City, Panama}, year = {2023}, abstract = {"Digital" is a popular adjective for concepts related to electronic, computerized or networked processes in current research and practice. From an ontological-theoretical perspective, the prevalence of digital things triggers the question, how Digitality itself could be conceptualized. This article studies the ontology of Digitality and consequently discusses Digital Innovation (DI) from a new perspective. First, literature on Digitality is analyzed. Based on the findings, an ontological conceptual framework of Digitality (OCFD) is proposed. It describes four layers of Digitality: physical foundations, virtuality, digital culture and world, and digital metaphysics. From a human perspective, requirements to grasp and embody Digitality are highlighted, as well as the expansion of reality. Finally, Digitality is discussed as a paradigm of DI and exemplary digital phenomena are projected onto the OCFD. This paper contributes to DI research and practice through theory-building towards a better understanding of ontological characteristics and practical implications of Digitality in DI.}, language = {en} } @incollection{MingioneKristal2023, author = {Mingione, Michela and Kristal, Samuel}, title = {Brand value co-creation: field emergence, applications, measurement and future research directions}, series = {A Research Agenda for Brand Management in a New Era of Consumerism}, booktitle = {A Research Agenda for Brand Management in a New Era of Consumerism}, publisher = {Edward Elgar Publishing}, address = {Cheltenham, UK}, doi = {10.4337/9781803925516.00013}, pages = {89 -- 106}, year = {2023}, language = {en} } @incollection{LevinaMattern2023, author = {Levina, Olga and Mattern, Saskia}, title = {Ethical and Legal Analysis of Machine Learning Based Systems: A Scenario Analysis of a Food Recommender System}, series = {Recommender Systems: Legal and Ethical Issues}, booktitle = {Recommender Systems: Legal and Ethical Issues}, isbn = {978-3-031-34806-8}, doi = {10.1007/978-3-031-34804-4_9}, pages = {165 -- 185}, year = {2023}, abstract = {Laws are the reflection of the ethical and moral principles of the society. While the use of technology influences users' behavior in a pace that is affected by the technology introduction to the market, legal activities can be driven by the society as the results of such interactions. This scenario analysis- based research focuses on a classic but fictional food recommender system and the ethical issues that might occur from its usage. The recommender system is taken here as an example of machine learning-based systems (MLS) that can often be found in the individual, business and administrative applications. The research compares the existing legal solutions, with the focus on the GDPR legislation, and the discovered ethical issues. The ethical analysis is led along the ALTAI principles suggested by the European Commission, the common good approach as well as the general principles constituted in human rights. While the GDPR-based analysis showed that this data- and privacy-based legislation addressed most of the identified ethical issues, questions related to the common good approach in the context of environment and mobility that arise due to the wide spectrum of the MLS usage require further legal discussion. The application of the two approaches shows that conducting the ethical and legal analysis is beneficial for both the designers of such MLS as well as the legal actors. The findings can enhance the design and functions of a user-facing MLS as well as influence or validate legal activities.}, language = {en} } @book{Brasche2023, author = {Brasche, Ulrich}, title = {Auf dem Weg zu mehr Klimagerechtigkeit Im B{\"u}ndnis mit dem Globalen S{\"u}den Widerst{\"a}nde {\"u}berwinden}, publisher = {oekom-Verlag}, address = {M{\"u}nchen}, isbn = {978-3-98726-045-2}, doi = {10.14512/9783987262746}, pages = {174 Seiten}, year = {2023}, abstract = {Die Menschen sind im Anthropoz{\"a}n auf einer gef{\"a}hrlichen Reise. Das Ziel steht noch nicht fest. Die Ankunft in einem guten Leben f{\"u}r alle innerhalb planetarer Grenzen ist immer noch m{\"o}glich. Aber zurzeit f{\"u}hrt die Reise eher zu einer {\"U}berhitzung der Erde. Gesundheit und Leben w{\"a}ren dann f{\"u}r viele Lebewesen - auch f{\"u}r den Menschen - massiv gef{\"a}hrdet. Das Buch behandelt die Fragen: • Wie sind wir in diese Lage geraten? • In welcher Richtung k{\"o}nnen Auswege liegen? • Welche Hindernisse sind zu {\"u}berwinden? Es werden Strategien abgewogen und einige {\"u}berraschende B{\"u}ndnispartner identifiziert. Geschickt gestaltete M{\"a}rkte k{\"o}nnen helfen, die Erderw{\"a}rmung aufzuhalten. Nur in einer gleicheren und gerechteren Welt k{\"o}nnten alle Menschen gut, aber bescheidener leben. Die Alternative dazu w{\"a}re eine {\"u}bererhitzte, gef{\"a}hrliche Welt. Eine gute Entwicklung ist noch m{\"o}glich. Sie erfordert eine globale Transformation von Wirtschaft und Gesellschaft. Die wohlhabenden Staaten sind gut beraten, die Interessen des „Globalen S{\"u}dens" und der k{\"u}nftigen Generationen zu respektieren - auch durch den klugen Einsatz erheblicher Finanzmittel und eine Kooperation auf Augenh{\"o}he.}, language = {de} } @inproceedings{Levina2023, author = {Levina, Olga}, title = {Operationalizing Ethics for Information Systems Design - A Tool for Ethical Software}, series = {Konferenz: Twenty-ninth Americas Conference on Information Systems (AMCIS), Panama, 2023}, booktitle = {Konferenz: Twenty-ninth Americas Conference on Information Systems (AMCIS), Panama, 2023}, pages = {4}, year = {2023}, abstract = {Propagation of information technology in the increasingly diverse domains, raises question concerning moral implications. While the number of ethical principles in the IT design is growing, they do not necessarily apply to specific products, which means developers and e.g. purchasing agent need to contextualize them for each specific IT product. This paper describes an actionable artifact that allows assessment of ethical non-functional requirements of an information system through operationalization of ethical values, Ethical Software Assessment Tool (ESAT). It is based on a survey of values that are currently considered in research and practice as well as in legal initiatives in IT context. The ethical approach and principles operationalized in ESAT are presented and discussed.}, language = {en} } @article{VegaJechowJamesAetal.2023, author = {Vega, Catherine Perez and Jechow, Andreas and James A., Campbell and Zielinska-Dabkowska, Karolina M. and Hoelker, Franz}, title = {Light pollution from illuminated bridges as a potential barrier for migrating fish-Linking measurements with a proposal for a conceptual model}, series = {Basic and Applied Ecology}, volume = {74}, journal = {Basic and Applied Ecology}, publisher = {Elsevier}, issn = {1618-0089}, doi = {10.1016/j.baae.2023.11.001}, pages = {1 -- 12}, year = {2023}, abstract = {Illuminated bridges have become important assets to navigable aquatic systems. However, if artificial light at night (ALAN) from illuminated bridges reaches aquatic habitats, such as rivers, it can threaten the river's natural heterogeneity and alter the behavioural responses of migratory fish. Here, via a pilot study, we quantified levels of ALAN at illuminated bridges that cross a river and, propose a conceptual model to estimate its potential implications on two migrating fish species with contrasting life histories. Night-time light measurements on the river Spree in Berlin were performed continuously along a transect and in detail at seven illuminated bridges. Photometric data of the pilot study showed rapidly increased and decreased light levels at several illuminated bridges from which we derived several model illumination scenarios. These illumination scenarios and their potential effect on migrating Atlantic salmon smolts (Salmo salar) and European silver eel (Anguilla anguilla) are presented as a conceptual model, considering illuminated bridges as behavioural barriers to fish migration. ALAN's adverse effects on freshwater habitats must be better researched, understood, managed, and properly communicated to develop future sustainable lighting practices and policies that preserve riverscapes and their biodiversity.}, language = {en} } @article{Vollmer2023, author = {Vollmer, Michael}, title = {So weit das Auge tr{\"a}gt}, series = {Physik in unserer Zeit}, volume = {54}, journal = {Physik in unserer Zeit}, number = {5}, publisher = {Wiley}, issn = {1521-3943}, doi = {10.1002/piuz.202301675}, pages = {222 -- 230}, year = {2023}, abstract = {Sichtweiten in der Atmosph{\"a}re reichen von wenigen Metern im Nebel bis zu einigen hundert Kilometern bei extrem guten Fernsichtbedingungen. Die zugrundeliegende Physik geht vom Wahrnehmungskontrast aus. Dieser {\"a}ndert sich mit der Entfernung entlang der Sichtlinie zwischen Objekt und Auge aufgrund von Lichtstreuung und Absorption an den Bestandteilen der Atmosph{\"a}re. Dazu kommt bei der Fernsicht die Refraktion, die es erlaubt, auch {\"u}ber den durch die Kugelform der Erde geometrisch bedingten Horizont hinaus zu sehen.}, language = {de} } @unpublished{WendzelCaviglioneMazurczyketal.2023, author = {Wendzel, Steffen and Caviglione, Luca and Mazurczyk, Wojciech and Mileva, Aleksandra and Dittmann, Jana and Kr{\"a}tzer, Christian and Lamsh{\"o}ft, Kevin and Vielhauer, Claus and Hartmann, Laura and Keller, J{\"o}rg and Neubert, Tom and Zillien, Sebastian}, title = {A Generic Taxonomy for Steganography Methods}, doi = {10.36227/techrxiv.20215373.v1}, year = {2023}, abstract = {A unified understanding of terms and their applicability is essential for every scientific discipline: steganography is no exception. Being divided into several domains (for instance, text steganography, digital media steganography, and network steganography), it is crucial to provide a unified terminology as well as a taxonomy that is not limited to some specific applications or areas. A prime attempt towards a unified understanding of terms was conducted in 2015 with the introduction of a pattern-based taxonomy for network steganography. Six years later, in 2021, the first work towards a pattern-based taxonomy for steganography was proposed. However, this initial attempt still faced several shortcomings, e.g., the lack of patterns for several steganography domains (the work mainly focused on network steganography and covert channels), various terminology issues, and the need of providing a tutorial on how the taxonomy can be used during engineering and scientific tasks, including the paper-writing process.

As the consortium who published this initial 2021-study on steganography patterns, in this paper we present the first comprehensive pattern-based taxonomy tailored to fit all known domains of steganography, including smaller and emerging areas, such as filesystem steganography and cyber-physical systems steganography. Besides, to make our contribution more effective and promote the use of the taxonomy to advance research on steganography, we also provide a thorough tutorial on its utilization.

Our pattern collection is available at https://patterns.ztt.hs-worms.de.

}, language = {en} } @misc{StockhausenJohannsenMaurer2023, author = {Stockhausen, Pablo and Johannsen, Andreas and Maurer, Robert}, title = {Machine-Learning Verfahren f{\"u}r eine nachhaltige Letzte-Meile-Logistik}, year = {2023}, abstract = {Dieser Beitrag entwickelt ein Konzept zur praktischen Umsetzung eines Machine- Learning Verfahrens zum L{\"o}sen von Vehicle Routing Problemen im Kontext einer nachhaltigen "Letzte-Meile"-Logistik, welches durch einen Prototyp umgesetzt und getestet wurde. Der Prototyp basiert auf dem "Reinforcement Learning"-System und verwendet als Algorithmus "REINFORCE mit Baseline". In einer Vergleichsanalyse wurde der Prototyp mit dem bekannten Vertreter Google-OR, anhand von zwei Anwendungsszenarien, verglichen. Der Prototyp {\"u}berzeugt dabei in der Laufzeit und dem Automatismus. Es konnte festgestellt werden, dass eine Verwendung von Lernenden-Systemen f{\"u}r das Vehicle Routing Problem sich bei nur bei einem gr{\"o}ßeren Stoppvolumen und einer erweiterten IT-Infrastruktur empfiehlt.}, language = {de} } @inproceedings{StockhausenJohannsenMaurer2023, author = {Stockhausen, Pablo and Johannsen, Andreas and Maurer, Robert}, title = {Konzeption eines Machine-Learnings-Verfahrens zum L{\"o}sen von Green Vehicle Routing Problemen}, series = {Konferenz: Informatik 2022, Lecture Notes in Informatics (LNI), Bonn, 2022/ Konferenzband: Informatik 2022 Fachtagung vom 26.-30. September 2022, Hamburg/ Band: P-326}, booktitle = {Konferenz: Informatik 2022, Lecture Notes in Informatics (LNI), Bonn, 2022/ Konferenzband: Informatik 2022 Fachtagung vom 26.-30. September 2022, Hamburg/ Band: P-326}, editor = {Krupka, Daniel and Federrath, Hannes and Demmler, Daniel}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, isbn = {978-3-88579-720-3}, pages = {885 -- 897}, year = {2023}, language = {de} } @article{BraubachJander2023, author = {Braubach, Lars and Jander, Kai}, title = {1. Introduction}, series = {International Journal of Parallel, Emergent and Distributed Systems}, volume = {38}, journal = {International Journal of Parallel, Emergent and Distributed Systems}, number = {6}, publisher = {Taylor \& Francis}, issn = {1744-5779}, doi = {10.1080/17445760.2023.2251386}, pages = {459 -- 460}, year = {2023}, language = {en} } @article{HascheKaraschewskiCreutzburg2023, author = {Hasche, Eberhard and Karaschewski, Oliver and Creutzburg, Reiner}, title = {iPhone12 imagery in scene-referred computer graphics pipelines}, series = {Electronic Imaging}, journal = {Electronic Imaging}, publisher = {Society for Imaging Science and Technology}, doi = {10.2352/EI.2023.35.3.MOBMU-350}, pages = {350-1 -- 350-14}, year = {2023}, abstract = {With the release of the Apple iPhone 12 Pro Max in 2020, various features were integrated that make it attractive as a recording device for scene-related computer graphics pipelines. The captured Apple RAW images have a much higher dynamic range than the standard 8-bit images. Since a scene-based workflow naturally has an extended dynamic range (HDR), the Apple RAW recordings can be well integrated. To correctly integrate the iPhone 12 pro Apple RAW data into a scene-related workflow, two command-line software solutions, among others, are dcraw and rawtoaces. In this paper, we concentrate on dcraw. dcraw offers the possibility to export RAW images directly to ACES2065-1. Different images recorded under different lighting conditions are examined to determine which options for the dcraw development produce the best results. Images from five different lighting situations like D65, D60, D55, D50, and 2980K, are examined. The DNG files are developed using different methods within dcraw. The values of the recorded ColorChecker24 patches are compared to reference values derived from BabelColor [1] and ACES [2].}, language = {en} } @article{JasterCreutzburgHasche2023, author = {Jaster, Daniel and Creutzburg, Reiner and Hasche, Eberhard}, title = {A qualitative study of LiDAR technologies and their application areas}, series = {Electronic Imaging}, volume = {35}, journal = {Electronic Imaging}, publisher = {Society for Imaging Science and Technology}, doi = {10.2352/EI.2023.35.3.MOBMU-368}, pages = {368-1 -- 368-15}, year = {2023}, abstract = {In this work, the most relevant 3D LiDAR technologies and their applications in 2022 were investigated. For this purpose, applications of LiDAR systems were classified into the typical application areas "3D modeling", "smart city", "robotics", "smart automotive" and "consumer goods". The investigation has shown that neither "mechanical" LiDAR technologies, nor so-called solid-state LiDAR technologies, nor "hybrid" LiDAR technologies can be evaluated as optimal for the typical application areas. In none of the application areas could all of the elaborated requirements be met. However, the "hybrid" LiDAR technologies such as sequential MEMS LiDAR technology and sequential flash LiDAR technology proved to be among the most suitable for most typical application areas. However, other technologies also tended to be suitable for individual typical application areas. Finally, it was found that several of the LiDAR technologies investigated are currently equally suitable for some typical application areas. To evaluate the suitability, concrete LiDAR systems - of different technologies and properties - were compared with the specific requirements of exemplary applications of an application area. The results of the investigation provide an orientation as to which LiDAR technology is promising for which application area.}, language = {en} } @article{MalekiMohammadi2023, author = {Maleki, Maniya and Mohammadi, Mahdieh}, title = {Velocity and pressure functions of an oscillating flow in a circular Hele-Shaw cell}, series = {Iranian Journal of Physics Research}, volume = {22}, journal = {Iranian Journal of Physics Research}, number = {1}, publisher = {Physics Society of Iran}, doi = {10.47176/ijpr.22.1.81304}, pages = {113 -- 120}, year = {2023}, abstract = {In this study, we have investigated the form of velocity and pressure functions of a fluid oscillating between two parallel glass sheets that form a circular Hele-Shaw cell. The flow has been considered to be radial, incompressible and laminar. The time-dependent Navier-Stokes equation has been solved in cylindrical coordinates using Fourier transform, and the oscillating flow velocity across the thickness of the cell has been obtained at different times. The flow velocity function in the unsteady state is related to the vertical component of the coordinates in the form of parabolic functions and also to the inverse of the radial component. The time dependence appears as a simple harmonic with a frequency equal to the oscillation frequency. The velocity of the flow is maximum at the middle of the cell along its height and gradually decreases from the middle towards the top or bottom plane and reaches zero. Pressure does not depend on the height and changes logarithmically with the radius. The dependence of pressure on time is also a simple harmonic with the external frequency, but it has a phase shift with respect to the velocity.}, language = {en} } @article{LachowskiHammermeisterHalenzetal.2023, author = {Lachowski, Krzysztof and Hammermeister, Florian and Halenz, Bastian and Lieckefett, Florian and G{\"o}tze, Thomas and Prill, Robert and Becker, Roland}, title = {The Patellostabilometer: A New Device for Quantification of Mediolateral Patella Displacement}, series = {Sensors}, journal = {Sensors}, number = {23 (3)}, publisher = {MDPI}, doi = {https://doi.org/10.3390/s23031274}, year = {2023}, abstract = {Mediolateral patella displacement is of interest for diagnostics and clinically relevant research questions. Apart from manual testing, no standardized method is currently available. Proper quantification of patella mobility is necessary to better understand pathologies at the patellofemoral joint. Patella mobility was assessed in 25 healthy individuals using a Patellostabilometer, a new prototype instrument for quantification of the mediolateral patella displacement. The participants underwent measurements of the mediolateral displacement three times using the Patellostabilome- ter. A maximal force of 10 N was applied for patella movement. Additionally, leg length and circumference of the knee, upper- and lower-leg were measured. Lateral patella displacement of 18.27 ± 3.76 mm (range 15.85-20.64 mm, interquartile range (IQR) of 4.79) was measured. The medial patella displacement showed 24.47 ± 6.59 mm (range 19.29-29.76 mm, IQR of 10.47). The test-retest measurement error was 2.32 ± 1.76 mm (IQR of 2.38 mm), with five outliers. There was greater test-retest variability between the measurements of the medial displacement compared to the lateral one. The test-retest variability reached 7\% of the patella displacement. Other parameters provided no significant correlations. Based on the natural patellofemoral mobility, a precise and clinically relevant quantification of patella mobility is allowed.}, language = {en} } @article{RizunRevinaEdelmann2023, author = {Rizun, Nina and Revina, Aleksandra and Edelmann, Noella}, title = {Application of Text Analytics in Public Service Co-Creation: Literature Review and Research Framework}, series = {DG.O 2023: The 24th Annual International Conference on Digital Government Research}, journal = {DG.O 2023: The 24th Annual International Conference on Digital Government Research}, publisher = {Association for Computing Machinery}, doi = {10.1145/3598469.3598471}, pages = {12 -- 22}, year = {2023}, abstract = {The public sector faces several challenges, such as a number of external and internal demands for change, citizens' dissatisfaction and frustration with public sector organizations, that need to be addressed. An alternative to the traditional top-down development of public services is co-creation of public services. Co-creation promotes collaboration between stakeholders with the aim to create better public services and achieve public values. At the same time, data analytics has been fuelled by the availability of immense amounts of textual data. Whilst both co-creation and TA have been used in the private sector, we study existing works on the application of Text Analytics (TA) techniques on text data to support public service co-creation. We systematically review 75 of the 979 papers that focus directly or indirectly on the application of TA in the context of public service development. In our review, we analyze the TA techniques, the public service they support, public value outcomes, and the co-creation phase they are used in. Our findings indicate that the TA implementation for co-creation is still in its early stages and thus still limited. Our research framework promotes the concept and stimulates the strengthening of the role of Text Analytics techniques to support public sector organisations and their use of co-creation process. From policy-makers' and public administration managers' standpoints, our findings and the proposed research framework can be used as a guideline in developing a strategy for the designing co-created and user-centred public services.}, language = {en} } @article{Guterding2023, author = {Guterding, Daniel}, title = {Sparse Modeling Approach to the Arbitrage-Free Interpolation of Plain-Vanilla Option Prices and Implied Volatilities}, series = {Risks}, journal = {Risks}, number = {11 (5)}, publisher = {MDPI AG}, doi = {https://doi.org/10.3390/risks11050083}, pages = {24}, year = {2023}, abstract = {We present a method for the arbitrage-free interpolation of plain-vanilla option prices and implied volatilities, which is based on a system of integral equations that relates terminal density and option prices. Using a discretization of the terminal density, we write these integral equations as a system of linear equations. We show that the kernel matrix of this system is, in general, ill-conditioned, so that it cannot be solved for the discretized density using a naive approach. Instead, we construct a sparse model for the kernel matrix using singular value decomposition (SVD), which allows us not only to systematically improve the condition number of the kernel matrix, but also determines the computational effort and accuracy of our method. In order to allow for the treatment of realistic inputs that may contain arbitrage, we reformulate the system of linear equations as an optimization problem, in which the SVD-transformed density minimizes the error between the input prices and the arbitrage-free prices generated by our method. To further stabilize the method in the presence of noisy input prices or arbitrage, we apply an 𝐿1-regularization to the SVD-transformed density. Our approach, which is inspired by recent progress in theoretical physics, offers a flexible and efficient framework for the arbitrage-free interpolation of plain-vanilla option prices and implied volatilities, without the need to explicitly specify a stochastic process, expansion basis functions or any other kind of model. We demonstrate the capabilities of our method in a number of artificial and realistic test cases.}, language = {en} } @article{StannariusHarth2023, author = {Stannarius, Ralf and Harth, Kirsten}, title = {The structure of disintegrating defect clusters in smectic C freely suspended films}, series = {Soft Matter}, journal = {Soft Matter}, number = {19}, publisher = {Royal Society of Chemistry}, doi = {https://doi.org/10.1039/d3sm00808h}, pages = {6109 -- 6115}, year = {2023}, abstract = {Disclinations or disclination clusters in smectic C freely suspended films with topological charges larger than one are unstable. They disintegrate, preferably in a spatially symmetric fashion, into single defects with individual charges of +1, which is the smallest positive topological charge allowed in polar vector fields. While the opposite process of defect annihilation is well-defined by the initial defect positions, disintegration starts from a singular state and the following scenario including the emerging regular defect patterns must be selected by specific mechanisms. We analyze experimental data and compare them with a simple model where the defect clusters adiabatically pass quasi-equilibrium solutions in one-constant approximation. It is found that the defects arrange in geometrical patterns that correspond very closely to superimposed singular defect solutions, without additional director distortions. The patterns expand by affine transformations where all distances between individual defects scale with the same time-dependent scaling factor proportional to the square-root of time.}, language = {en} } @article{XuShimizuGuterdingetal.2023, author = {Xu, Han-Xiang and Shimizu, Makoto and Guterding, Daniel and Otsuki, Junya and Jeschke, Harald O.}, title = {Pressure evolution of electronic structure and magnetism in the layered van der Waals ferromagnet CrGeTe3}, series = {Physical Review B}, journal = {Physical Review B}, number = {Vol. 108}, publisher = {American Physical Society}, doi = {https://doi.org/10.1103/PhysRevB.108.125142}, pages = {15}, year = {2023}, abstract = {Layered van der Waals ferromagnets, which preserve their magnetic properties down to exfoliated monolayers, are fueling an abundance of fundamental research and nanoscale device demonstration. CrGeTe3 is a prime example of this class of materials. Its temperature-pressure phase diagram features an insulator-to-metal transition and a significant increase in ferromagnetic Curie-Weiss temperatures upon entering the metallic state. We use density functional theory to understand the magnetic exchange interactions in CrGeTe3 at ambient and elevated pressures. We calculate Heisenberg exchange couplings, which provide the correct ferromagnetic ground state and explain the experimentally observed pressure dependence of magnetism in CrGeTe3. Furthermore, we combine density functional theory with dynamical mean-field theory to investigate the effects of electronic correlations and the nature of the high-pressure metallic state in CrGeTe3.}, language = {en} } @article{KloppTrittelHarthetal.2023, author = {Klopp, Christoph and Trittel, Torsten and Harth, Kirsten and Stannarius, Ralf}, title = {Coalescence of biphasic droplets embedded in free standing smectic A films}, series = {Soft Matter}, volume = {20}, journal = {Soft Matter}, number = {5}, publisher = {Royal Society of Chemistry}, issn = {1744-683X}, doi = {10.1039/d3sm01549a}, pages = {1036 -- 1046}, year = {2023}, abstract = {We investigate micrometer-sized flat droplets consisting of an isotropic core surrounded by a nematic rim in freely suspended smectic A liquid-crystal films. In contrast to purely isotropic droplets which are characterized by a sharp edge and no long-range interactions, the nematic fringe introduces a continuous film thickness change resulting in long-range mutual attraction of droplets. The coalescence scenario is divided in two phases. The first one consists in the fusion of the nematic regions. The second phase involves the dissolution of a thin nematic film between the two isotropic cores. The latter has many similarities with the rupture of thin liquid films between droplets coalescing in an immiscible viscous liquid. Coalescence of biphasic droplets in free-standing smectic films is controlled in part by the rupture of a thin nematic membrane separating the isotropic droplet cores.}, language = {en} } @article{NagelSchminder2023, author = {Nagel, Michael and Schminder, Christian}, title = {Sachbezogenes Verhandeln als Methode im Zielbildungsprozess von innovationsorientierten Public Private Partnerships.}, series = {Ideen- und Innovationsmanagement}, journal = {Ideen- und Innovationsmanagement}, number = {2}, editor = {Erich Schmidt Verlag,}, publisher = {Erich Schmidt Verlag GmbH \& Co}, issn = {2198-3151}, doi = {10.37307/j.2198-3151.2022.02.07}, pages = {72 -- 77}, year = {2023}, language = {de} } @article{Johannsen2023, author = {Johannsen, Andreas}, title = {ERP-Einf{\"u}hrung - Bewertung einer Standardimplementierungsmethode f{\"u}r SAP Business One}, series = {ERP Management}, journal = {ERP Management}, publisher = {GITO Verlag}, issn = {1860-6725}, pages = {19 -- 22}, year = {2023}, language = {de} } @article{KuznetsovFroripSuenteretal.2023, author = {Kuznetsov, Arthur and Frorip, Aleksandr and S{\"u}nter, Alar and Kasvand, Nensi and Korsakov, Vadim and Konoplev, Georgii and Stepanova, Oksana and Rusalepp, Linda and Anton, Dea and P{\"u}ssa, T{\~o}nu and Roasto, Mati and Abramova, Liubov and Kozin, Andrey and Toom, Lauri and Hirsch, S{\"o}ren and Mukhin, Nikolay}, title = {Fast Protein and Metabolites (Nucleotides and Nucleosides) Liquid Chromatography Technique and Chemical Sensor for the Assessment of Fish and Meat Freshness}, series = {Chemosensors}, journal = {Chemosensors}, number = {1/2023 / Band 11}, editor = {mdpi,}, publisher = {MDPI}, issn = {2227-9040}, doi = {10.3390/chemosensors11010069}, pages = {69}, year = {2023}, abstract = {Fast protein and metabolite liquid chromatography (FPLMC) was introduced years ago to enable the easy separation of high-molecular compounds such as proteins from small molecules and the identification of the low-molecular substances. In this paper, the method is applied for the rapid evaluation of freshness and monitoring the aging of animal meat and fish. A novel chromatographic sensor was developed with a deep UV LED-based photometric detection unit (255-265 nm), an original flow cuvette and registration scheme; the processing of a chromatogram with the sensor takes approximately 15 min. Strict isochronism between the elution of ATP metabolites, mainly hypoxanthine (Hx) and inosine monophosphate (IMP), and the time of maturation of meat or fish, was discovered. A new freshness index H* = [Hx]/[IMP] was introduced, which is proportional to the instrumental delay time in the FPMLC chromatograms: the H* index < 0.5 indicates the presence of inosine monophosphate (IMP) and the high quality of the meat or fish. Reasonably strong correlations were revealed between data obtained by FPMLC and total volatile basic nitrogen TVB-N (for fish) or volatile fatty acids VFA (for meat) content. Moreover, putative nucleotide salvage and an increase in the concentration of IMP were observed in fish after heat treatment using the FPMLC sensor and NMR technique.}, language = {en} }