TY - CHAP A1 - Frosch, Katharina T1 - Scan to Learn: A Lightweight Approach for Informal Mobile Micro-Learning at the Workplace T2 - Konferenz: IARIA The Fifteenth International Conference on Mobile, Hybrid, and On-line Learning; Venice (Italy) N2 - Informal learning at the workplace is a crucial ingredient in updating and upskilling today's workforce, but in many jobs, informal learning opportunities are scarce. Bite-sized learning via mobile devices (Mobile Micro-Learning, MML) can be a powerful means to enhance informal work-related learning also in such learning-deprived fields. Based on good practices of recent MML implementations, a lightweight approach is developed. It involves an instructional blueprint and an open-source, low-threshold technology for MML, and meets the specific needs of workers in learning-deprived fields. The main idea is a scan-to-learn system where Quick Response (QR) codes are attached to physical objects in the work environment. Workers can scan the QR codes to learn and are directed to short, interactive learning nuggets. For evaluation, a proof-of-concept is provided. Y1 - 2023 SN - 978-1-68558-081-0 SP - 53 EP - 61 PB - IARIA ER - TY - CHAP A1 - Weber, Kristin A1 - Veit, David A1 - Johannsen, Andreas ED - Wildau, Technische Hochschule T1 - Anforderungen an die IT-Dokumentation aus Sicht von Informationssicherheit und Datenschutz T2 - Konferenz: Angewandte Forschung in der Wirtschaftsinformatik (AKWI), Heide, 2020/ Konferenzband: Angewandte Forschung in der Wirtschaftsinformatik 2020: Tagungsband zur 33. AKWI-Jahrestagung am 14.09.2020 ausgerichtet von der Hochschule Karlsruhe - Wirtschaft und Technik Y1 - 2020 SN - 978-3-944330-66-2 PB - mana-Buch CY - Heide ER - TY - JOUR A1 - Johannsen, Andreas A1 - Kant, Daniel T1 - IT-Governance, Risiko- und Compliance-Management (IT‑GRC) – Ein Kompetenz-orientierter Ansatz für KMU JF - HMD Praxis der Wirtschaftsinformatik KW - IT-Governance KW - IT-Risikomanagement KW - IT-Compliance KW - Security Awareness KW - IT-GRC Reifegrad KW - KMU Y1 - 2020 U6 - https://doi.org/10.1365/s40702-020-00625-8 PB - Springer Vieweg CY - Wiesbaden ER - TY - CHAP A1 - Levina, Olga T1 - Transparency of Data Origin and Business Value as Factors for the Assessment of Opportunities and Risks of Machine Learning- based Systems T2 - AI4EU Workshop: The Culture of Trustworthy AI. Public debate, education, practical learning, Venice, 2021 Y1 - 2021 ER - TY - CHAP A1 - Hildebrandt, Mario A1 - Altschaffel, Robert A1 - Lamshöft, Kevin A1 - Lange, Mathias A1 - Szemkus, Martin A1 - Neubert, Tom A1 - Vielhauer, Claus A1 - Ding, Yongjian A1 - Dittmann, Jana T1 - Threat Analysis of Steganographic and Covert Communication in Nuclear I&C Systems T2 - Konferenz: International Conference on Nuclear Security: Sustaining and Strengthening Efforts (ICONS), Vienna, Austria, 2020/ Konferenzband: International Conference on Nuclear Security: Sustaining and Strengthening Efforts N2 - Steganographic and covert communication is increasingly used for hiding attacks. Often information hiding is used by attackers in advanced persistent threats in order to operate without being noticed. Attackers might use it to hide data exfiltration or control channels for persistent malware. The paper analyzes potential threats to operational technology by investigating different communication protocols towards their suitability as cover channels. Using a generalized network architecture model and the communication flows of nuclear power plants, the attack potential using information hiding is exemplary assessed. An example for a supply chain attack for command injection is given on the foundation of the OPC UA protocol and an off-theshelf programmable logic controller. Subsequently, recommendations for a strategic and operational preparation for operators towards the prevention and detection of information hiding attacks are derived. Y1 - 2020 UR - https://www.researchgate.net/publication/350966454_Threat_Analysis_of_Steganographic_and_Covert_Communication_in_Nuclear_IC_Systems PB - IAEA CY - Vienna, Austria ER - TY - JOUR A1 - Koldeweij, Robin B. J. A1 - Kant, Pallav A1 - Harth, Kirsten A1 - Ruiter, Rielle de A1 - Gelderblom, Hanneke A1 - Snoeijer, Jacco H. A1 - Lohse, Detlef A1 - Limbeek, Michiel A. J. van T1 - Initial solidification dynamics of spreading droplets JF - Physical Review Fluids N2 - When a droplet is brought in contact with an undercooled surface, it wets the substrate and solidifies at the same time. The interplay between the phase transition effects and the contact-line motion, leading to its arrest, remains poorly understood. Here we reveal the early solidification patterns and dynamics of spreading hexadecane droplets. Total internal reflection imaging is employed to temporally and spatially resolve the early solidification behavior. With this, we determine the conditions leading to the contact-line arrest. We quantify the overall nucleation behavior, i.e., the nucleation rate and the crystal growth speed and show its sensitivity to the applied undercooling of the substrate. We also show that for strong enough undercooling it is the rapid growth of the crystals which determines the eventual arrest of the spreading contact line. By combining the Johnson-Mehl-Avrami-Kolmogorov nucleation theory and scaling relations for the spreading, we calculate the temporal evolution of the solid area fraction, which is in good agreement with our observations. Y1 - 2021 UR - https://link.aps.org/doi/10.1103/PhysRevFluids.6.L121601 U6 - https://doi.org/10.1103/PhysRevFluids.6.L121601 SN - 2469-990X IS - 12 PB - American Physical Society ER - TY - JOUR A1 - Stannarius, Ralf A1 - Harth, Kirsten T1 - The structure of disintegrating defect clusters in smectic C freely suspended films JF - Soft Matter N2 - 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. Y1 - 2023 UR - https://pubs.rsc.org/en/content/articlelanding/2023/sm/d3sm00808h U6 - https://doi.org/https://doi.org/10.1039/d3sm00808h IS - 19 SP - 6109 EP - 6115 PB - Royal Society of Chemistry ER - TY - JOUR A1 - Klopp, Christoph A1 - Trittel, Torsten A1 - Harth, Kirsten A1 - Stannarius, Ralf T1 - Coalescence of biphasic droplets embedded in free standing smectic A films JF - Soft Matter N2 - 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. Y1 - 2023 UR - https://pubs.rsc.org/en/content/articlelanding/2024/sm/d3sm01549a U6 - https://doi.org/10.1039/d3sm01549a SN - 1744-683X VL - 20 IS - 5 SP - 1036 EP - 1046 PB - Royal Society of Chemistry ER - TY - CHAP A1 - Johannsen, Andreas A1 - Maurer, Robert A1 - Stockhausen, Pablo ED - Wolf, Martin T1 - Konzeption eines Machine-Learning-Verfahrens zum Lösen von Green Vehicle Routing Problemen. T2 - Konferenz: Jahrestagung des Arbeitskreises Wirtschaftsinformatik an Hochschulen für Angewandte Wissenschaften im deutschsprachigen Raum (AKWI), Berlin, 2022/ Konferenzband: Angewandte Forschung in der Wirtschaftsinformatik 2022: Tagungsband zur 35. Jahrestagung des Arbeitskreises Wirtschaftsinformatik an Hochschulen für Angewandte Wissenschaften im deutschsprachigen Raum (AKWI) vom 11.09. bis 13.09.2022, ausgerichtet von der Hochschule für Technik und Wirtschaft Berlin (HTW Berlin) und der Hochschule für Wirtschaft und Recht Berlin (HWR Berlin) Y1 - 2022 SN - 978-3-95545-409-8 U6 - https://doi.org/10.30844/AKWI_2022_17 N1 - Band: 35 PB - GITO CY - Berlin ER - TY - CHAP A1 - Stockhausen, Pablo A1 - Johannsen, Andreas A1 - Maurer, Robert ED - Krupka, Daniel ED - Federrath, Hannes ED - Demmler, Daniel T1 - Konzeption eines Machine-Learnings-Verfahrens zum Lösen von Green Vehicle Routing Problemen T2 - Konferenz: Informatik 2022, Lecture Notes in Informatics (LNI), Bonn, 2022/ Konferenzband: Informatik 2022 Fachtagung vom 26.-30. September 2022, Hamburg/ Band: P-326 Y1 - 2023 SN - 978-3-88579-720-3 U6 - https://doi.org/10.18420/inf2022_75 SP - 885 EP - 897 PB - Gesellschaft für Informatik CY - Bonn ER -