@article{QiaoGradNonn, author = {Qiao, Yu and Grad, Marius and Nonn, Aida}, title = {Toward an Efficient and Robust Process-Structure Prediction Framework for Filigree L-PBF 316L Stainless Steel Structures}, series = {Metals}, volume = {15}, journal = {Metals}, number = {7}, publisher = {MDPI}, issn = {2075-4701}, doi = {10.3390/met15070812}, pages = {22}, abstract = {Additive manufacturing (AM), particularly laser powder bed fusion (L-PBF), provides unmatched design flexibility for creating intricate steel structures with minimal post-processing. However, adopting L-PBF for high-performance applications is difficult due to the challenge of predicting microstructure evolution. This is because the process is sensitive to many parameters and has a complex thermal history. Thin-walled geometries present an added challenge because their dimensions often approach the scale of individual grains. Thus, microstructure becomes a critical factor in the overall integrity of the component. This study focuses on applying cellular automata (CA) modeling to establish robust and efficient process-structure relationships in L-PBF of 316L stainless steel. The CA framework simulates solidification-driven grain evolution and texture development across various processing conditions. Model predictions are evaluated against experimental electron backscatter diffraction (EBSD) data, with additional quantitative comparisons based on texture and morphology metrics. The results demonstrate that CA simulations calibrated with relevant process parameters can effectively reproduce key microstructural features, including grain size distributions, aspect ratios, and texture components, observed in thin-walled L-PBF structures. This work highlights the strengths and limitations of CA-based modeling and supports its role in reliably designing and optimizing complex L-PBF components.}, language = {en} } @inproceedings{SchwaegerlUhrigWestfechtel, author = {Schw{\"a}gerl, Felix and Uhrig, Sabrina and Westfechtel, Bernhard}, title = {A Graph-based Algorithm for Three-way Merging of Ordered Collections in EMF Models}, series = {Science of Computer Programming}, volume = {113}, booktitle = {Science of Computer Programming}, number = {Part 1}, doi = {10.1016/j.scico.2015.02.008}, pages = {51 -- 81}, abstract = {In EMF models, ordered collections appear as the values of multi-valued structural features. Traditional, text-based version control systems do not sufficiently support three-way merging of ordered collections inside EMF models since they cannot guarantee a consistent result. The operation three-way merging is defined as follows: based on a common base version b, two alternative versions and were developed by copying and modifying the base version. To reconcile these changes, a merged version m is to be created as a common successor of and . In this paper, we present a graph algorithm to solve the problem of three-way merging of ordered collections in EMF models. Each version of a collection can be represented by means of a linearly ordered graph. To create the merged version, these graphs are combined to a merged collection graph using set formula. To create the merged collection, a generalized topological sort is performed on the merged collection graph. Conflicts occur in case the order of elements cannot be deduced automatically; these conflicts are resolved either interactively or by default rules. We have implemented the merge algorithm in our tool BTMerge, which performs a consistency-preserving three-way merge of versions of EMF models being instances of arbitrary Ecore models. Our implementation relies on an alternative form of representing multiple versions of a collection, namely a versioned collection graph which forms a superimposition of collection versions. The algorithm presented here is purely state-based. Matching and merging of collections are clearly separated sub-problems. Insertions and deletions performed on the elements of the collection are propagated into the merged version in a consistent way. Our algorithm makes only minimal assumptions with regard to the underlying product model and thus may be applied to ordered collections inside plain text or XML files. By taking arbitrary move operations into account, the algorithm considerably goes beyond the functionality of contemporary merge tools which cannot adequately handle move operations.}, language = {en} } @inproceedings{BuchmannSchwaegerl, author = {Buchmann, Thomas and Schw{\"a}gerl, Felix}, title = {Breaking the Boundaries of Meta Models and Preventing Information Loss in Model-Driven Software Product Lines}, series = {Proceedings of the 11th International Conference on Evaluation of Novel Software Approaches to Software Engineering, Vol 1, 2016, Rome, Italy}, booktitle = {Proceedings of the 11th International Conference on Evaluation of Novel Software Approaches to Software Engineering, Vol 1, 2016, Rome, Italy}, publisher = {SCITEPRESS - Science and and Technology Publications}, doi = {10.5220/0005789100730083}, pages = {83}, abstract = {Model-driven software product line engineering is an integrating discipline for which tool support has become available recently. However, existing tools are still immature and have several weaknesses. Among others, limitations in variability, caused by meta model restrictions, and unintended information loss are not addressed. In this paper, we present two conceptual extensions to model-driven product line engineering based on negative variability, being alternative mappings and surrogates. Alternative mappings allow for unconstrained variability, mitigating meta model restrictions by virtually extending the underlying multi-variant domain model. Surrogates prevent unintended information loss during product derivation based on a contextsensitive product analysis, which can be controlled by a declarative OCL-based language. Both extensions have been implemented in FAMILE, a model-driven product line tool that is based on EMF, provides dedicated consistency repair mechanisms, and completely automates application engineering. The added value of alternative mappings and surrogates is demonstrated by a running example.}, language = {en} } @inproceedings{SchwaegerlUhrigWestfechtel, author = {Schw{\"a}gerl, Felix and Uhrig, Sabrina and Westfechtel, Bernhard}, title = {Model-based tool support for consistent three-way merging of EMF models}, series = {ACME '13, Proceedings of the workshop on ACadeMics Tooling with Eclipse}, booktitle = {ACME '13, Proceedings of the workshop on ACadeMics Tooling with Eclipse}, publisher = {ACM}, address = {New York, NY, USA}, doi = {10.1145/2491279.2491281}, abstract = {Inadequate version control has been identified as a major obstacle to the application of model-driven software engineering. In particular, sophisticated support for merging model versions is urgently needed. We present a tool for merging of EMF models which may be applied to instances of arbitrary Ecore models. The tool advances the state of the art by guaranteeing a consistent merge result. Furthermore, it detects and resolves not only context-free, but also context-sensitive conflicts. Our merge tool is model-based; it relies on EMF for its implementation. Initial experiences gained from its application confirm that the merge tool operates both accurately and efficiently.}, language = {en} } @unpublished{Chow, author = {Chow, Rosan}, title = {Narcissistic and Embodied Human-Centered-Design}, isbn = {978-3-0356-3012-1}, doi = {10.35096/othr/pub-8755}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-87557}, pages = {5}, abstract = {In recent years, there have been calls to replace Human-Centered-Design (HCD) with More-Than-Human-Design (MTHD). The proponents of MTHD dismiss HCD for various reasons; however, the fact that they use the same title, terms and phrases such as posthuman, decenter human, anti-anthropocentric; systematically or not, coherently or not, together they create a strong sense that HCD is pass{\´e} and must be left behind. Anthropocentrism has gotten a lot of beatings from multiple quarters to the extent that the term carries now a negative connotation. This negative mood seems to get carried away and over to the criticisms of HCD as human-centered is synonymous with anthropocentric. My contribution is to point out, while anthropocentrism is a position of value; it might also be understood as an inescapable condition. Before the MTHD movement sweeps away indiscriminately all HCD, a more careful look is in order.}, subject = {Design, Human-Centered, Posthuman, Anthropocentrism}, language = {en} } @inproceedings{SachenbacherLeucker, author = {Sachenbacher, Martin and Leucker, Martin}, title = {Towards Monitoring and Diagnosis of Quantum Digital Twins}, series = {Lecture Notes in Informatics (LNI)}, volume = {P-366}, booktitle = {Lecture Notes in Informatics (LNI)}, publisher = {Gesellschaft f{\"u}r Informatik e.V.}, address = {Bonn}, doi = {10.18420/INF2025_159}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-87546}, pages = {1767 -- 1772}, abstract = {As access to larger-scale quantum computers is still limited, it is useful to simulate quantum algorithms on specialized programmable logic hardware such as FPGAs to exploit analogies between quantum and digital circuits, and allow for analysis and efficient debugging of quantum programs. Such simulations can be viewed as digital representations of actual physical systems, commonly referred to as Digital Twins (DTs). In previous work, we applied formal methods from runtime verification to synthesize monitors capable of real-time analysis of conventional DTs. Specifically, these monitors supervise alignment with their physical counterparts and support model-based diagnosis to identify potential root causes of observed deviations. In this short paper, we present ongoing work aimed at adapting and extending our approach to hardware-based simulation and analysis of quantum software on FPGAs, with the objective of improving both accuracy and resilience.}, language = {en} } @misc{GschossmannSchedelSuessetal., author = {Gschoßmann, Lukas and Schedel, Valentin and S{\"u}ß, Franz and Weber, Markus and Pfingsten, Andrea and Dendorfer, Sebastian}, title = {Evaluating Knee Joint Loads Across Exercises and Activities of Daily Living to Personalize TKA Rehabilitation}, series = {ISB 2025 - The XXX Congress of the International Society of Biomechanics, 27.-31. July 2025, Stockholm}, journal = {ISB 2025 - The XXX Congress of the International Society of Biomechanics, 27.-31. July 2025, Stockholm}, doi = {10.35096/othr/pub-8725}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-87252}, pages = {1}, abstract = {This study assessed knee joint loading during various physiotherapy exercises and activities of daily living in 30 healthy subjects. Results showed that lunges and squats caused the highest joint forces, while gait and stair activities also imposed substantial loads. These findings support datadriven exercise selection for personalized rehabilitation after total knee arthroplasty.}, language = {en} } @incollection{Chow, author = {Chow, Rosan}, title = {Narcissistic- und Embodied Human-Centered-Design}, series = {Nutzen statt Besitzen}, booktitle = {Nutzen statt Besitzen}, editor = {Brandes, Uta and Bieling, Tom and Christensen, Michelle and Jonas, Wolfgang}, publisher = {Birkh{\"a}user}, address = {Basel}, isbn = {978-3-0356-3012-1}, pages = {91 -- 101}, abstract = {In recent years, there have been calls to replace Human-Centered-Design (HCD) with More-Than-Human-Design (MTHD). The proponents of MTHD dismiss HCD for various reasons; however, the fact that they use the same title, terms and phrases such as posthuman, decenter human, anti-anthropocentric; systematically or not, coherently or not, together they create a strong sense that HCD is pass{\´e} and must be left behind. Anthropocentrism has gotten a lot of beatings from multiple quarters to the extent that the term carries now a negative connotation. This negative mood seems to get carried away and over to the criticisms of HCD as human-centered is synonymous with anthropocentric. My contribution is to point out, while anthropocentrism is a position of value; it might also be understood as an inescapable condition. Before the MTHD movement sweeps away indiscriminately all HCD, a more careful look is in order.}, language = {de} } @article{RueckertRauberMaerkletal., author = {Rueckert, Tobias and Rauber, David and Maerkl, Raphaela and Klausmann, Leonard and Yildiran, Suemeyye R. and Gutbrod, Max and Nunes, Danilo Weber and Moreno, Alvaro Fernandez and Luengo, Imanol and Stoyanov, Danail and Toussaint, Nicolas and Cho, Enki and Kim, Hyeon Bae and Choo, Oh Sung and Kim, Ka Young and Kim, Seong Tae and Arantes, Gon{\c{c}}alo and Song, Kehan and Zhu, Jianjun and Xiong, Junchen and Lin, Tingyi and Kikuchi, Shunsuke and Matsuzaki, Hiroki and Kouno, Atsushi and Manesco, Jo{\~a}o Renato Ribeiro and Papa, Jo{\~a}o Paulo and Choi, Tae-Min and Jeong, Tae Kyeong and Park, Juyoun and Alabi, Oluwatosin and Wei, Meng and Vercauteren, Tom and Wu, Runzhi and Xu, Mengya and Wang, An and Bai, Long and Ren, Hongliang and Yamlahi, Amine and Hennighausen, Jakob and Maier-Hein, Lena and Kondo, Satoshi and Kasai, Satoshi and Hirasawa, Kousuke and Yang, Shu and Wang, Yihui and Chen, Hao and Rodr{\´i}guez, Santiago and Aparicio, Nicol{\´a}s and Manrique, Leonardo and Palm, Christoph and Wilhelm, Dirk and Feussner, Hubertus and Rueckert, Daniel and Speidel, Stefanie and Nasirihaghighi, Sahar and Al Khalil, Yasmina and Li, Yiping and Arbel{\´a}ez, Pablo and Ayobi, Nicol{\´a}s and Hosie, Olivia and Lyons, Juan Camilo}, title = {Comparative validation of surgical phase recognition, instrument keypoint estimation, and instrument instance segmentation in endoscopy: Results of the PhaKIR 2024 challenge}, series = {Medical Image Analysis}, volume = {109}, journal = {Medical Image Analysis}, publisher = {Elsevier}, issn = {1361-8415}, doi = {10.1016/j.media.2026.103945}, pages = {31}, abstract = {Reliable recognition and localization of surgical instruments in endoscopic video recordings are foundational for a wide range of applications in computer- and robot-assisted minimally invasive surgery (RAMIS), including surgical training, skill assessment, and autonomous assistance. However, robust performance under real-world conditions remains a significant challenge. Incorporating surgical context - such as the current procedural phase - has emerged as a promising strategy to improve robustness and interpretability. To address these challenges, we organized the Surgical Procedure Phase, Keypoint, and Instrument Recognition (PhaKIR) sub-challenge as part of the Endoscopic Vision (EndoVis) challenge at MICCAI 2024. We introduced a novel, multi-center dataset comprising thirteen full-length laparoscopic cholecystectomy videos collected from three distinct medical institutions, with unified annotations for three interrelated tasks: surgical phase recognition, instrument keypoint estimation, and instrument instance segmentation. Unlike existing datasets, ours enables joint investigation of instrument localization and procedural context within the same data while supporting the integration of temporal information across entire procedures. We report results and findings in accordance with the BIAS guidelines for biomedical image analysis challenges. The PhaKIR sub-challenge advances the field by providing a unique benchmark for developing temporally aware, context-driven methods in RAMIS and offers a high-quality resource to support future research in surgical scene understanding.}, language = {en} } @article{HollweckLeidingerHartmannetal., author = {Hollweck, Christoph and Leidinger, Lukas and Hartmann, Stefan and Wagner, Marcus and W{\"u}chner, Roland}, title = {An analysis of the critical time step size for explicit dynamics using trimmed B-splines, LR-splines, and THB-splines}, series = {Computer Methods in Applied Mechanics and Engineering}, volume = {450}, journal = {Computer Methods in Applied Mechanics and Engineering}, publisher = {Elsevier}, issn = {0045-7825}, doi = {10.1016/j.cma.2025.118656}, pages = {36}, abstract = {Isogeometric analysis (IGA) combined with explicit dynamics is increasingly used in academia and has already been successfully applied in industrial simulations, including crash and sheet-metal forming. Since explicit schemes are only conditionally stable, accurate estimation of the critical time step is essential for both stability and efficiency. Adaptive mesh refinement is widely used to balance accuracy and computational cost. In IGA, THB- and LR-splines break the tensor-product structure of standard B-splines and enable local refinement, but their effect on the critical time step under trimming has not been systematically studied - a key requirement for reliable time step estimation. We investigate the critical time step in explicit dynamic simulations using trimmed B-splines, LR-splines, and THB-splines, based on a lumped mass matrix obtained by simple row summation. One-dimensional bar, two-dimensional membrane, and trimmed shell models are analyzed to determine how trimming and local refinement influence element and system eigenfrequencies, which directly control the stable time step. Refined boundary elements in open knot vectors are identified as the main bottleneck. Trimming these elements can increase the stable time step, though certain trimming configurations introduce new restrictions. Results show that LR- and THB-splines impose time step constraints similar to B-splines, making them equally suitable for explicit simulations. We also present a general method for computing element-wise B{\´e}zier extraction operators for LR- and THB-splines, enabling straightforward integration into standard finite element solvers. The findings are validated through nonlinear sheet-metal forming simulations in LS-DYNA using shells discretized with trimmed B-, LR-, and THB-splines. This represents the first such application and demonstrates their practical feasibility for industrial use.}, language = {en} } @misc{Amberger, author = {Amberger, Franziska}, title = {Optimierung der Bemessung von Mauerwerksbauten unter Horizontallast}, language = {de} } @article{KaessStrahringerWestner, author = {K{\"a}ss, Sebastian and Strahringer, Susanne and Westner, Markus}, title = {Archetypes, Situations, and Practices : a Guide to Successful Low-Code Adoption}, series = {Information Resources Management Journal}, volume = {38}, journal = {Information Resources Management Journal}, number = {1}, publisher = {IGI Global}, issn = {1040-1628}, doi = {10.4018/IRMJ.396005}, pages = {26}, abstract = {This paper extends prior work on low-code by explaining when adoption archetypes occur and how to use them. Motivated by information technology (IT) talent shortages and uneven low-code development platform (LCDP) outcomes, the paper seeks practical guidance for post-adoption choices in work systems. Using a multiple mini case study of 36 cases in large German organizations, this study analyzes interviews and context questionnaires with within-/cross-case coding and pattern matching against a 13-factor model. This analysis identifies situations that trigger three adoption archetypes—application development democratizers, synergy realizers, and IT resource shortage mitigators—and one non-adoption archetype, intricacy adversaries. The analysis also maps advantages and disadvantages and distills 12 good practices. Across adoption cases, efficiency is the dominant goal, whereas non-adoption stems from high application sophistication. The results give actionable guidance: align goals to an archetype, stick to LCDP standards, involve IT and foster an open culture, invest in skilling, reuse platform components, and reserve LCDPs for less-complex apps while planning architecture early.}, language = {en} } @incollection{Westner, author = {Westner, Markus}, title = {Generative AI in Business}, series = {Artificial Intelligence in Business and Engineering}, booktitle = {Artificial Intelligence in Business and Engineering}, editor = {Hofbauer, G{\"u}nter}, publisher = {Kohlhammer}, address = {Stuttgart}, isbn = {978-3-17-046742-2}, pages = {38 -- 50}, abstract = {Generative Artificial Intelligence (GenAI) is transforming industries at an unprecedented rate, offering novel opportunities for productivity and innovation. This article explores the adoption of GenAI, highlighting its accelerated uptake compared to previous technologies. Key topics include productivity gains through GenAI tools (e.g., ChatGPT, Klarna's AI assistant), challenges such as data quality and organizational readiness, and the implications for business strategy. Practical recommendations for managing generative AI adoption and maximizing its impact on both individual and organizational levels are also provided. The analysis underscores the necessity of aligning AI capabilities with customer needs and creating data-driven, adaptable business models.}, language = {en} } @inproceedings{PreissWestner, author = {Preiß, Niklas and Westner, Markus}, title = {From Agents to Copilots: a Systematic Review of Digital Assistant Technology Adoption in Proprietary Productivity Software}, series = {Annals of Computer Science and Information Systems}, volume = {43}, booktitle = {Annals of Computer Science and Information Systems}, publisher = {Polish Information Processing Society}, issn = {2300-5963}, doi = {10.15439/2025F3271}, pages = {565 -- 576}, abstract = {This study provides a systematic review of how the impact and adaptation of digital assistant technologies (DATs) are defined, operationalized, and studied, synthesizing key domains where DATs generate or are expected to generate value. Based on an analysis of 61 articles published since 2013, it identifies five main areas of impact: productivity and efficiency, business development, resource optimization, quality enhancement, and the promotion of learning and creativity. The review highlights DAT adoption across various disciplines and industries, while revealing limited longitudinal research on benefits and adaptation. Key gaps remain in understanding strategic use and sustained impact. Future research should explore longitudinal comparisons of recently introduced generative AI-driven DATs and their organizational implications. This review contributes to information systems research by structuring current knowledge on DAT adoption and outcomes, and by proposing a research agenda to support deeper exploration of their value and long-term integration.}, language = {en} } @inproceedings{KoehlerHarlWestneretal., author = {K{\"o}hler, Jessica and Harl, Maximilian Victor and Westner, Markus and Strahringer, Susanne}, title = {Can AI be a Scholar? A Systematic Review on the Role of Generative AI in Systematic Literature Reviews}, series = {2025 27th International Conference on Business Informatics (CBI), 09-12. September 2025, Lisbon, Portugal}, booktitle = {2025 27th International Conference on Business Informatics (CBI), 09-12. September 2025, Lisbon, Portugal}, publisher = {IEEE}, doi = {10.1109/CBI68102.2025.00012}, pages = {11}, abstract = {Systematic literature reviews (SLRs) are foundational for research but resource-intensive to conduct. With the rise of large language models (LLMs) such as ChatGPT, generative AI (GenAI) tools are being increasingly explored for their potential to support and transform the SLR process. This study presents a systematic review of peerreviewed articles that examine how LLM-based GenAI tools are used in different SLR phases. Following the PRISMA 2020 guidelines, we screened 1,846 publications published since January 2021 until April 2025 and selected 54 for in-depth analysis. Each study was coded by review phase, prompting approach, automation level, validation type and challenges. Our findings show that GenAI is most often used to support in the screening, search, and writing phases, typically through Basic Prompting and under human oversight. While many studies report efficiency gains, concerns remain regarding validity, transparency, and methodological rigor. Moreover, GenAI is frequently applied to isolated tasks but is rarely embedded in a structured, methodologically guided review processhighlighting the need for clearer phase-specific guidance and standards. We offer a structured, phase-specific synthesis that highlights both the promise and the current limitations of GenAI in literature reviews and thereby offer practical recommendations for the responsible use of GenAI in literature reviews.}, language = {en} } @phdthesis{Fleischmann, author = {Fleischmann, Florian}, title = {Ein Beitrag zur Bestimmung der Rheologischen Eigenschaften Selbstverdichtender Betone mit dem Kugel-Messsystem}, address = {Bochum}, pages = {XI, 167}, abstract = {Zur Erfassung der rheologischen Eigenschaften Selbstverdichtender Betone (SVB) existieren unterschiedlichste Betonrheometer und Messsysteme. Aufgrund der besonderen Eigenschaften Selbstverdichtender Betone ist die Erfassung deutlich schwieriger als bei Fl{\"u}ssigkeiten und feink{\"o}rnigen Suspensionen. Vor allem die Zusammensetzung unterschiedlicher Ausgangsstoffe, die verwendete grobe Gesteinsk{\"o}rnung sowie die ablaufende Hydratation und die dabei entstehenden Wechselwirkungskr{\"a}fte erschweren die Bestimmung der rheologischen Eigenschaften. Ferner haben diese Eigenheiten zur Folge, dass die geforderten Randbedingungen der klassischen Rheologie nicht mehr eingehalten sind und eine genormte Darstellung der Ergebnisse nicht m{\"o}glich ist. Bei den existierenden Betonrheometern handelt es sich daher meist um Relativ-Messsysteme, die an die Rheometer der klassischen Rheologie angepasst sind. Eine exakte Bestimmung der rheologischen Eigenschaften Selbstverdichtender Betone ist daher schwierig. Ein Kennzeichen vieler Betonrheometer ist zudem die hohe Schergeschwindigkeit und die permanente Scherung der Probe. Diese Scherbelastung entspricht aber in den meisten F{\"a}llen nicht dem tats{\"a}chlichen Fließverhalten Selbstverdichtender Betone. Aufgrund dieser Sachlage hat sich diese Arbeit ergeben. Ziel war die Entwicklung eines Betonrheometers, das die speziellen Eigenschaften des SVB ber{\"u}cksichtigt und die tats{\"a}chlichen Fließbedingungen simuliert. Als Ausgangspunkt diente die exzentrisch rotierende Kugel (Kugel-Messsystem), die bereits f{\"u}r rheologische Untersuchungen von Leimen und M{\"o}rtel erfolgreich eingesetzt wird. Eine Kugel bewegt sich dabei auf einer Kreisbahn durch den Leim oder den M{\"o}rtel und erfasst das Widerstandsmoment bei definierter Geschwindigkeit. Rheometer auf der Grundlage des Kugel-Messsystems erm{\"o}glichen die Ermittlung von mehreren Fließparametern in frischen, ungest{\"o}rten Zementleimen oder Selbstverdichtenden M{\"o}rtel. Durch geeignete Wahl des Messprofils k{\"o}nnen mit diesem Messsystem in kurzer Zeit genaue Informationen {\"u}ber das Fließverhalten ermittelt werden. In den hier beschriebenen Studien wurde das Kugel-Messsystem f{\"u}r Selbstverdichtende Betone adaptiert und an seine speziellen Randbedingungen angepasst. Bei der Messung kamen zwei grundlegende Messprofile zum Einsatz: Beim ersten Messprofil wurde ein Rampenprofil mit zu- und abnehmender Geschwindigkeit vorgegeben und die dazugeh{\"o}rigen Messwerte als Fließkurve dargestellt. Beim zweiten Messprofil wurde eine konstante Geschwindigkeit vorgegeben und die dabei ermittelte Schubspannung {\"u}ber den Messzeitraum bzw. {\"u}ber den zur{\"u}ckgelegten Weg der Kugel abgebildet. Als Resultat konnten die Fließgrenze und die Viskosit{\"a}t ausgewertet werden. Mit unterschiedlichen Messprofilen und den damit verbundenen unterschiedlichen Auswertungen wurden unterschiedlich definierte Fließgrenzen ermittelt und einander gegen{\"u}bergestellt. Um den Zusammenhang mit dem Setzfließmaß und der Trichterauslaufzeit darzulegen, wurde das modifizierte Kugel-Messsystem anhand mehrerer SVBRezepturen verifiziert. F{\"u}r die Bewertung des Fließverhaltens wurde jeder Abschnitt der Messkurven betrachtet und diskutiert. Um die Ergebnisse einordnen und mit anderen Rheometern vergleichen zu k{\"o}nnen, wurden aus den gemessenen Werten die rheologisch genormten Einheiten berechnet. Neben der Berechnung dieser genormten Einheiten, die in dieser V Arbeit kontrovers diskutiert wird, wurde auch das Str{\"o}mungsverhalten der Kugel beim Durchfahren des Betons beobachtet und beschrieben. Ein weiterer wesentlicher Aspekt war die Betrachtung der Geschwindigkeit, mit der die Kugel durch den Beton f{\"a}hrt. Diese Geschwindigkeit hat einen betr{\"a}chtlichen Einfluss auf die Ergebnisse der Messung. Bei zu geringer Geschwindigkeit konnte weder eine Fließkurve noch der Verlauf der Schubspannung bei konstanter Geschwindigkeit erzeugt werden. Bei zu hoher Geschwindigkeit war dagegen, zu Beginn der Messung eine zus{\"a}tzliche Widerstandskraft infolge der hohen Beschleunigung der Kugel zu verzeichnen. Neben der Geschwindigkeit war auch der Strukturaufbau nach einer Ruhezeit von Bedeutung. Beobachtet wurde das Verhalten nach einer, drei, f{\"u}nf, zehn und 20 Minuten. Es konnte beobachtet werden, dass es infolge der Hydratation und unterschiedlicher Wechselwirkungskr{\"a}fte zu einem Strukturaufbau kommt, der sich deutlich auf die gemessenen Fließgrenzen (insbesondere die Statische Fließgrenze) und die Viskosit{\"a}t auswirkt. Die Reproduzierbarkeit der Ergebnisse wurde anhand unterschiedlicher Betonrezepturen und Wiederholungsversuchen gezeigt. Ein besonderes Augenmerk lag dabei in der Betrachtung eines variierenden Wassergehalts bei gleichbleibender Rezeptur. Mit dem modifizierten Kugel-Messsystem war es m{\"o}glich, bereits geringe Wassergehaltsschwankungen (3 bis 5 l/m³) verl{\"a}sslich zu erfassen. Das Messger{\"a}t wurde schließlich mit der Vane-Zelle und dem Platte/Platte-Messsystem verglichen. Ein direkter Vergleich der Messwerte war jedoch schwierig, da den drei Ger{\"a}ten unterschiedliche Messsysteme zugrunde liegen. Auch die Umrechnung der Messwerte in genormte rheologische Einheiten ist von Messger{\"a}t zu Messger{\"a}t unterschiedlich und die Ergebnisse somit nicht identisch. Ein Vergleich war aus diesem Grund nur qualitativ m{\"o}glich. In dieser Arbeit konnte gezeigt werden, dass es m{\"o}glich ist, mit einem Messger{\"a}t auf Grundlage der exzentrisch rotierenden Kugel, die rheologischen Eigenschaften Selbstverdichtender Betone zu bewerten. Dabei wurden die Bedingungen einer langsamen Schergeschwindigkeit und der Messung in frischem Beton eingehalten.}, language = {de} } @article{SchieglSchrollDeckerKurbel, author = {Schiegl, Corina and Schroll-Decker, Irmgard and Kurbel, Matthias}, title = {Potenzial trotz schwerer Krankheit : {\"U}bergangswohnform zur außerklinischen Beatmungsentw{\"o}hnung er{\"o}ffnet Option zur Selbstbestimmung}, series = {Forum Sozialarbeit + Gesundheit}, volume = {31}, journal = {Forum Sozialarbeit + Gesundheit}, number = {1}, publisher = {utb}, address = {Stuttgart}, abstract = {Selbstbestimmung gilt als wesentlicher Wert in der Sozialen Arbeit. Wenn Menschen ihre Bed{\"u}rfnisse kennen und {\"a}ußern k{\"o}nnen, tr{\"a}gt dies zum Wohlbefinden bei und steigert die subjektive Lebensqualit{\"a}t. Die Interventionen Sozialer Arbeit sollen es daher erm{\"o}glichen, dass Menschen {\"u}ber ihre eigenen Lebensbedingungen Kontrolle erhalten. Wie gestaltet sich aber die Selbstbestimmung bei einer Intensivpflegebed{\"u}rftigkeit? Dieser Beitrag thematisiert, wie schwer erkrankte Menschen, die beispielsweise von einem Beatmungsger{\"a}t abh{\"a}ngig sind, ihre Selbstbestimmung verstehen. Anhand der Ergebnisse einer qualitativen Studie wird gezeigt, welche Aspekte von Selbstbestimmung bei schwersten krankheitsbedingten Einschr{\"a}nkungen individuell priorisiert werden.}, language = {de} } @misc{SchrollDecker, author = {Schroll-Decker, Irmgard}, title = {Stephan Rixen / Eva Maria Welskop-Deffaa (Hrsg.): Klimasozialpolitik. Der Klimaschutz-Beschluss des Bundesverfassungsgerichts und seine Folgen}, series = {Socialnet Rezensionen}, journal = {Socialnet Rezensionen}, publisher = {Socialnet GmbH}, address = {Bonn}, language = {de} } @misc{SchrollDecker, author = {Schroll-Decker,}, title = {Michael Weber: Werkst{\"a}tten f{\"u}r behinderte Menschen - Inklusionshemmnis oder Weg zur Teilhabe?}, series = {Socialnet Rezensionen}, journal = {Socialnet Rezensionen}, publisher = {Socialnet GmbH}, address = {Bonn}, language = {de} } @misc{SchrollDecker, author = {Schroll-Decker, Irmgard}, title = {Christina Hansen, Kathrin Plank (Hrsg.): Im Zwiegespr{\"a}ch mit Janusz Korczak. Was wir im Europa des 21. Jahrhunderts vom „Weltenwanderer, Tabubrecher und Kr{\"a}ftez{\"a}hmer" lernen k{\"o}nnen}, series = {Socialnet Rezensionen}, journal = {Socialnet Rezensionen}, publisher = {Socialnet GmbH}, address = {Bonn}, language = {de} } @article{WolfgrammAbbSampetal., author = {Wolfgramm, Alex and Abb, Valerius and Samp, Artur and Samp, Rafal and Hoffmann, Jens Christoph and M{\"u}ller, Rainer and Kammler, Martin}, title = {Structural and functional evolution of HKUST-1 nanoparticles induced by ball milling}, series = {Next Materials}, volume = {10}, journal = {Next Materials}, publisher = {Elsevier}, doi = {10.1016/j.nxmate.2025.101544}, pages = {7}, abstract = {In this study, the effect of post-synthetic ball milling on the structural and functional properties of as-synthesized nanoparticles of the copper-based metal-organic framework (MOF) HKUST-1 was investigated for the first time. Nanoparticles were synthesized using sodium formate as a capping agent. The crystalline particles were subjected to a controlled ball milling process, which induced significant structural changes. Powder X-ray diffraction (PXRD) revealed a reduction in crystallite size from 91 nm to 21 nm and the introduction of microstrain, partially disrupting the MOF's long-range crystalline order, as evidenced by peak broadening and the diminished intensity of high-angle reflections. Particle morphology pre- and post-milling was further studied with scanning electron microscopy (SEM) imaging, verifying a narrow particle size distribution of ± 22 nm after milling. Fourier-transform infrared spectroscopy (FTIR) indicated protonation of carboxylate groups in the larger pores of the framework, likely due to moisture incorporation during milling. Brunauer-Emmett-Teller (BET) surface area analysis showed a substantial decrease in specific surface area from 521 m²/g to 226 m²/g, suggesting a partial collapse of the porous framework. We discuss the applicability of ball milling as a versatile means of post-synthetic approach to reduce MOF particle sizes, a key element in the preparation of MOF-based thin films using inks or polymers.}, language = {en} }