Hochschule Bonn-Rhein-Sieg
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Effects of Stretch-Bending Straightening on the Tensile Properties of Cold Rolled Packaging Steel
Get PDFAchieving perfect flatness, tension-free surfaces, and exceptional resistance to spring back are important characteristics of packaging steel, setting the standard for high-quality material performance. To guarantee these crucial parameters, the implementation of the stretch-bending process at the final stage of the production route is indispensable. Besides improving the flatness properties, the induced plastic deformation results in an accompanying change in the mechanical properties. This investigation focuses on understanding this change in mechanical properties due to different stretch-bending straightening process parameters. A multivariate predictive model is created to calculate a process window for achieving the desired flatness and also mechanical properties in the production of packaging steel. This model is validated by experiments with a laboratory facility
Kommentar zu "Pätz, R.: MINTfluencerinnen auf Instagram. Sozialmediale Sichtbarkeit junger Frauen in MINT-Berufen"
No full textIm PR-Nebel stochern. Möglichkeiten und Grenzen automatischer, KI-basierter Detektion von Fake News und Desinformation in der strategischen Kommunikation mit NEBULA
No full textLearning-Based Personalisation of Robot Behaviour for Robot-Assisted Therapy
No full textDuring robot-assisted therapy, a robot typically needs to be partially or fully controlled by therapists, for instance using a Wizard-of-Oz protocol; this makes therapeutic sessions tedious to conduct, as therapists cannot fully focus on the interaction with the person under therapy. In this work, we develop a learning-based behaviour model that can be used to increase the autonomy of a robot’s decision-making process. We investigate reinforcement learning as a model training technique and compare different reward functions that consider a user’s engagement and activity performance. We also analyse various strategies that aim to make the learning process more tractable, namely i) behaviour model training with a learned user model, ii) policy transfer between user groups, and iii) policy learning from expert feedback. We demonstrate that policy transfer can significantly speed up the policy learning process, although the reward function has an important effect on the actions that a robot can choose. Although the main focus of this paper is the personalisation pipeline itself, we further evaluate the learned behaviour models in a small-scale real-world feasibility study in which six users participated in a sequence learning game with an assistive robot. The results of this study seem to suggest that learning from guidance may result in the most adequate policies in terms of increasing the engagement and game performance of users, but a large-scale user study is needed to verify the validity of that observation
Consensus guidelines for the diagnosis and management of isolated sulfite oxidase deficiency and molybdenum cofactor deficiencies
Get PDFSulfite intoxication is the hallmark of four ultrarare disorders that are caused by impaired sulfite oxidase activity due to genetic defects in the synthesis of the molybdenum cofactor or of the apoenzyme sulfite oxidase. Delays on the diagnosis of these disorders are common and have been caused by their unspecific presentation of acute neonatal encephalopathy with high early mortality, followed by the evolution of dystonic cerebral palsy and also by the lack of easily available and reliable diagnostic tests. There is significant variation in survival and in the quality of symptomatic management of affected children. One of the four disorders, molybdenum cofactor deficiency type A (MoCD-A) has recently become amenable to causal treatment with synthetic cPMP (fosdenopterin). The evidence base for the rational use of cPMP is very limited. This prompted the formulation of these clinical guidelines to facilitate diagnosis and support the management of patients. The guidelines were developed by experts in diagnosis and treatment of sulfite intoxication disorders. It reflects expert consensus opinion and evidence from a systematic literature search
What Makes XR Dark? Examining Emerging Dark Patterns in Augmented and Virtual Reality through Expert Co-Design
No full textDark Patterns are deceptive designs that influence a user's interactions with an interface to benefit someone other than the user. Prior work has identified dark patterns in WIMP interfaces and ubicomp environments, but how dark patterns can manifest in Augmented and Virtual Reality (collectively XR) requires more attention. We therefore conducted ten co-design workshops with 20 experts in XR and deceptive design. Our participants co-designed 42 scenarios containing dark patterns, based on application archetypes presented in recent HCI/XR literature. In the co-designed scenarios, we identified ten novel dark patterns in addition to 39 existing ones, as well as ten examples in which specific characteristics associated with XR potentially amplified the effect dark patterns could have on users. Based on our findings and prior work, we present a classification of XR-specific properties that facilitate dark patterns: perception, spatiality, physical/virtual barriers, and XR device sensing. We also present the experts’ assessments of the likelihood and severity of the co-designed scenarios and highlight key aspects they considered for this evaluation, for example, technological feasibility, ease of upscaling and distributing malicious implementations, and the application's context of use. Finally, we discuss means to mitigate XR dark patterns and support regulatory bodies to reduce potential harms
Enhancing Quality in Commercially Used Explosives Detection Dogs
No full textExplosives detection dog (EDD) teams are deployed at mass events such as concerts, annual general meetings of large listed companies or in air cargo security. However, outside of EU-regulated air cargo, there is no common quality standard for commercial EDD in Germany and many neighboring countries. While law enforcement agencies have access to experienced chemists and can conduct dog training with homemade explosives, small commercial security services do not have comparable capabilities and face additional legal hurdles. The DIN SPEC 77201 was developed within the project to fulfil the need for a generally accepted quality standard. A training workshop was developed and transferred from the academic sector to commercial partners in order to improve training opportunities with home-made explosives, providing new insights for training EDD teams with TATP, HMTD or training aids
Linear Multivariable Control Engineering Using GNU Octave
No full textThis textbook presents an in-depth introductory survey of several fundamental advanced control concepts and techniques all ranging from modern ideas. The book emphasizes ideas, an understanding of key concepts, methodologies, and results. In line with this, the book addresses master’s students in the overlap of engineering and computer science as well as engineers working in various application fields and interested in useful control techniques and less in system theories appealing from a mathematical point of view
Wohnen als Erfolgsfaktor fairer Fachkräftemigration
No full textVor dem Hintergrund der zunehmenden Internationalisierung der Arbeits- und Ausbildungsmärkte in Deutschland wird der Zugang zu qualitativ gutem und bezahlbarem Wohnraum zu einem wichtigen Standort- und Wettbewerbsfaktor. Die Verfügbarkeit von Wohnraum ist zudem eine wichtige Voraussetzung für die Integration, die Teilhabe und die Lebensqualität zugewanderter Fachkräfte.
In diesem Kontext adressiert das vorliegende Diskussionspapier die strukturellen Rahmenbedingungen der Debatte um die integrative Funktion des Wohnens im Kontext der Fachkräftezuwanderung. Es wird argumentiert, dass das Thema Wohnen nicht nur im Zuständigkeitsbereich von Unternehmen liegt, sondern auch eine kommunal- und eine entwicklungspolitische Dimension besitzt und es systemischer Lösungsansätze bedarf. Auf der Grundlage einer umfassenden Internet- und Literaturrecherche und acht problemzentrierten Experteninterviews beschreibt das Diskussionspapier die korrespondierenden Herausforderungen, skizziert prototypische Praxisbeispiele und unterbreitet Handlungsempfehlungen für eine ganzheitliche Herangehensweise, die für Unternehmen und kommunal- und entwicklungspolitische Akteure gleichermaßen relevant ist. Diese Empfehlungen umfassen neben der Bereitstellung von Wohnraum Aspekte der sozialen Infrastruktur, der Orientierung und Beratung, der Vernetzung und des Dialogs