@article{KopperKlotzWestneretal., author = {Kopper, Andreas and Klotz, Stefan and Westner, Markus and Strahringer, Susanne}, title = {Shadow IT and Business-managed IT}, series = {Journal of Information Technology Management (JITM)}, volume = {30}, journal = {Journal of Information Technology Management (JITM)}, number = {4}, issn = {1042-1319}, pages = {25}, abstract = {Two concepts describe the autonomous deployment of IT by business entities: Shadow IT and Business-managed IT. Shadow IT is deployed covertly, that is, software, hardware, or IT services created/procured or managed by business entities without alignment with the IT organization. In contrast, Business-managed IT describes the overt deployment of IT, that is, in alignment with the IT organization or in a split responsibility model. The purpose of this paper is to extend the conceptual understanding of Shadow IT and Business-managed IT, comparing the perceptions of 29 CIOs and senior IT managers with the results of a systematic literature review. By doing so, this paper presents a structured and comprehensive view of causing factors, outcomes, and governance of Shadow IT and Business-managed IT in practice. A comparison of academic literature and practitioner perceptions reveals the limitations and gaps of the current research and highlights avenues for future research. The authors find three category-spanning themes occurring as causing factors, outcomes, and—as part of governance measures—factors to improve the IT organization: (1) (Poor) business-IT alignment (2) (lack of) agility, and (3) (lack of) policies. This study is innovative with its comprehensive qualitative interview data that the authors compare to the existing literature. Therefore, the paper brings together theoretical and practical insights into Shadow IT and Businessmanaged IT, which should aid practitioners and scholars in decision making and future research.}, subject = {Corporate Governance}, language = {en} } @article{KlotzKopperWestneretal., author = {Klotz, Stefan and Kopper, Andreas and Westner, Markus and Strahringer, Susanne}, title = {Causing factors, outcomes, and governance of Shadow IT and business-managed IT}, series = {International Journal of Information Systems and Project Management}, volume = {7}, journal = {International Journal of Information Systems and Project Management}, number = {1}, issn = {2182-7796}, doi = {10.12821/ijispm070102}, pages = {15 -- 43}, abstract = {Shadow IT and Business-managed IT describe the autonomous deployment/procurement or management of Information Technology (IT) instances, i.e., software, hardware, or IT services, by business entities. For Shadow IT, this happens covertly, i.e., without alignment with the IT organization; for Business-managed IT this happens overtly, i.e., in alignment with the IT organization or in a split responsibility model. We conduct a systematic literature review and structure the identified research themes in a framework of causing factors, outcomes, and governance. As causing factors, we identify enablers, motivators, and missing barriers. Outcomes can be benefits as well as risks/shortcomings of Shadow IT and Business-managed IT. Concerning governance, we distinguish two subcategories: general governance for Shadow IT and Business-managed IT and instance governance for overt Business-managed IT. Thus, a specific set of governance approaches exists for Business-managed IT that cannot be applied to Shadow IT due to its covert nature. Hence, we extend the existing conceptual understanding and allocate research themes to Shadow IT, Business-managed IT, or both concepts and particularly distinguish the governance of the two concepts. Besides, we find that governance themes have been the primary research focus since 2016, whereas older publications (until 2015) focused on causing factors.}, subject = {Betriebliches Informationssystem}, language = {en} } @article{JoblinMauerer, author = {Joblin, Mitchell and Mauerer, Wolfgang}, title = {An Interactive Survey Framework for Validation of Social Network Analysis}, series = {The R Journal}, volume = {8}, journal = {The R Journal}, number = {1}, pages = {149 -- 158}, abstract = {Abstract Social network analysis is extremely well supported by the R community and is routinely used for studying the relationships between people engaged in collaborative activities. While there has been rapid development of new approaches and metrics in this field, the challenging question of validity (how well insights derived from social networks agree with reality) is often difficult to address. We propose the use of several R packages to generate interactive surveys that are specifically well suited for validating social network analyses. Using our web-based survey application, we were able to validate the results of applying community-detection algorithms to infer the organizational structure of software developers contributing to open-source projects.}, language = {en} } @misc{OPUS4-276, title = {Angewandte Forschung in der Wirtschaftsinformatik: Prozesse, Technologien, Anwendungen, Systeme und Management}, editor = {Barton, Thomas and Herrmann, Frank and Meister, Vera G. and M{\"u}ller, Christian and Seel, Christian}, publisher = {mana-Buch}, address = {Heide}, organization = {Arbeitskreis Wirtschaftsinformatik an Fachhochschulen (AKWI)}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-2767}, subject = {Wirtschaftsinformatik}, language = {de} } @misc{OPUS4-280, title = {Angewandte Forschung in der Wirtschaftsinformatik}, editor = {Barton, Thomas and Herrmann, Frank and Meister, Vera G. and M{\"u}ller, Christian and Seel, Christian and Steffens, Ulrike}, publisher = {mana-Buch}, address = {Heide}, organization = {Arbeitskreis Wirtschaftsinformatik an Hochschulen f{\"u}r angewandte Wissenschaften}, doi = {10.15771/10.15771/978-3-944330-59-4}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-2809}, subject = {Wirtschaftsinformatik}, language = {de} } @article{HupfeldLaumerSticheletal., author = {Hupfeld, T. and Laumer, Tobias and Stichel, T. and Schuffenhauer, T. and Heberle, J. and Schmidt, Michael and Barcikowski, S. and G{\"o}kce, B.}, title = {A new approach to coat PA12 powders with laser-generated nanoparticles for selective laser sintering}, series = {Procedia CIRP}, volume = {74}, journal = {Procedia CIRP}, publisher = {Elsevier}, doi = {10.1016/j.procir.2018.08.103}, pages = {244 -- 248}, abstract = {The modification of selective laser sintering (SLS) powder materials by nanoadditives offers the possibility to adapt the powder properties to the laser sintering process or the resulting part properties. To avoid agglomeration of the nanofiller, a new approach in which surfactant-free laser-generated colloidal nanoparticles are adsorbed onto the polymer surface directly in an aqueous solution is demonstrated. Based on this novel approach, polyamide 12 (PA12) powders are decorated with metal and oxide nanoparticles and processed via SLS. Electron microscopy and confocal laser scanning imaging are utilized to analyze the dispersion of the filler.}, language = {en} } @article{SavelevFetisovChashinetal., author = {Savelev, Dmitrii V. and Fetisov, Leonid Y. and Chashin, Dmitri V. and Shabin, P. A. and Vyunik, D. A. and Fedulov, Feodor and Kettl, Wolfgang and Shamonin (Chamonine), Mikhail}, title = {Method of Measuring Deformations of Magnetoactive Elastomers under the Action of Magnetic Fields}, series = {Russian Technological Journal}, volume = {7}, journal = {Russian Technological Journal}, number = {4}, doi = {10.32362/2500-316x-2019-7-4-81-91}, pages = {81 -- 91}, language = {ru} } @article{MarkovGlazerElbeSchliermann, author = {Markov-Glazer, Alon and Elbe, Anne-Marie and Schliermann, Rainer}, title = {The use of psychological skills in deaflympic sport}, series = {European Journal of Adapted Physical Activity}, volume = {17}, journal = {European Journal of Adapted Physical Activity}, number = {15}, publisher = {European Federation of Adapted Physical Activity}, address = {Olomouc}, doi = {10.5507/euj.2024.012}, pages = {13}, abstract = {This study explores the use of psychological skills among Deaflympic athletes and aims to provide initial insights into sport psychology practices in this overlooked population. To this end, the frequency of psychological skills' usage, usage patterns, and differences between subgroups were examined within this population. The Test of Performance Strategies (TOPS) was administered to 84 German Deaflympic athletes (mean age = 28; 27\% female) along with biographical questions (e.g., hearing status). The findings indicate that Deaflympic athletes regularly utilize psychological skills in training and competition, displaying similar usage to that of Olympic athletes. However, only a minority of Deaflympic athletes train their skills with professional consultants. Additionally, relaxation techniques were employed rarely in comparison to the other investigated skills. This study's findings contribute to the foundation of sport psychology research with Deaflympic athletes and underscore the need for a differentiated approach in tailoring interventions for this population.}, language = {en} } @inproceedings{GerschSchulzBagdahn, author = {Gersch, Sebastian and Schulz, Carsten and Bagdahn, J{\"o}rg}, title = {Impact of hatching strategy on mechanical properties and residual stresses in additively manufactured AlSi10Mg components}, series = {TMS 2025 154th annual meeting \& exhibition supplemental proceedings}, booktitle = {TMS 2025 154th annual meeting \& exhibition supplemental proceedings}, publisher = {Springer}, address = {Cham}, isbn = {9783031807473}, issn = {2367-1181}, doi = {10.1007/978-3-031-80748-0_15}, pages = {170 -- 181}, abstract = {This study examines the impact of different hatching strategies on the mechanical and technological properties, as well as the manufacturing-induced residual stresses of additively manufactured AlSi10Mg components produced using Laser Powder Bed Fusion (LPBF). For the sample production, parallel and orthogonal hatching patterns were employed at various rotation angles, leading to differences in the mechanical properties of the components. The parallel structure exhibits significantly higher compressive residual stresses in the near-surface areas of the component, up to 33\% greater than those observed in the orthogonal structure. These compressive residual stresses could counteract operational tensile stresses, potentially enhancing the load-bearing capacity of the component. The findings of this study provide insights into the targeted use of hatching strategies to optimize the mechanical properties and lifespan of components. Future works should focus on experimentally validating the simulation results using the core hole method to further improve the correlation between numerical models and actual stress distributions.}, language = {en} } @inproceedings{Palm, author = {Palm, Christoph}, title = {Fusion of Serial 2D Section Images and MRI Reference}, series = {Workshop Innovative Verarbeitung bioelektrischer und biomagnetischer Signale (bbs2014), Berlin, 10.04.2014}, booktitle = {Workshop Innovative Verarbeitung bioelektrischer und biomagnetischer Signale (bbs2014), Berlin, 10.04.2014}, doi = {10.13140/RG.2.1.1358.3449}, abstract = {Serial 2D section images with high resolution, resulting from innovative imaging methods become even more valuable, if they are fused with in vivo volumes. Achieving this goal, the 3D context of the sections would be restored, the deformations would be corrected and the artefacts would be eliminated. However, the registration in this field faces big challenges and is not solved in general. On the other hand, several approaches have been introduced dealing at least with some of these difficulties. Here, a brief overview of the topic is given and some of the solutions are presented. It does not constitute the claim to be a complete review, but could be a starting point for those who are interested in this field.}, subject = {Kernspintomografie}, language = {en} } @article{ThiemeLinnemannMuehlbergetal., author = {Thieme, Dorothea and Linnemann, Birgit and M{\"u}hlberg, Katja Sibylle and Noppeney, Thomas and Kreutz, Maria and Thieme, Marcus}, title = {Compression Therapy in Acute Deep Venous Thrombosis of the Lower Limb and for the Prevention of Post-Thrombotic Syndrome}, series = {Deutsches {\"A}rzteblatt International}, volume = {121}, journal = {Deutsches {\"A}rzteblatt International}, number = {6}, address = {Berlin}, doi = {10.3238/arztebl.m2024.0001}, pages = {188 -- 194}, abstract = {Background: After an acute deep venous thrombosis (DVT) of the lower limb, 20\% to 63\% of patients develop post-thrombotic syndrome (PTS). In this review, we address the efficacy of compression therapy in the treatment of acute DVT of the lower limb, and for the prevention of PTS. Methods: 12 randomized controlled trials (RCTs) and one meta-analysis, with a total of 3751 patients, were identified in a structured literature search. Results: Two RCTs showed that adding compression therapy to drug treatment in the first 9 days of the acute phase of lower limb DVT led to more rapid pain relief (p<0.050) and less swelling (remaining difference in circumference, 1 cm versus 3 cm, p<0.050). As for the prevention of PTS, four RCTs showed a short-term benefit or no benefit of compression therapy. In three further RCTs, medical compression stockings (MCS) brought about a 16\% to 27\% absolute reduction of the frequency and severity of PTS (47\% vs. 20 \%, p<0.001; 40\% vs. 21\% (95\% confidence intervals [29.9; 50.1] and [12.7; 29.5], respectively; and 58\% vs. 42\%, relative risk [RR] 0.73 [0,55; 0.96]). The benefit of MCS was also confirmed in a recent meta-analysis (RR 0.66 [0.44; 0.99], I2 = 88\%). Thigh-length MCS were not superior to knee-length MCS for the prevention of PTS (33\% vs. 36\%, hazard ratio [HR] 0.93 [0.62; 1.41]). Individual, symptomoriented tailoring of the duration of treatment was not inferior to a fixed treatment duration of 24 months (29\% vs. 28\%; odds ratio [OR] 1.06 [0.78;1.44]). Conclusion: Compression therapy relieves symptoms in acute DVT and lessens the frequency and severity of PTS. It is therefore recommended as standard treatment.}, language = {en} } @inproceedings{GalkaWeigert, author = {Galka, Stefan and Weigert, Alexander}, title = {Petri Net Structures for Automated Model Generation through Process Descriptions}, series = {IFAC Papers OnLine}, volume = {59}, booktitle = {IFAC Papers OnLine}, number = {10}, publisher = {Elsevier}, doi = {10.1016/j.ifacol.2025.09.093}, pages = {542 -- 547}, abstract = {Creating simulation models and running experiments requires expertise and significant effort. Modelling complex production systems by using Petri Nets, which have a simple formalism, leads to considerable modelling effort. To reduce the workload required, fundamental processes within a production system must be analyzed and represented as generic Petri Net structures to enable their automatic generation. These structures can serve as modular building blocks to construct arbitrarily complex systems. The broader objective is to enable the automatic generation of such, based on process descriptions within a simulation framework. Built on these findings, the necessary information for developing a specialized formal process description is derived, enabling the automated generation of Petri Net simulation models for production systems.}, language = {en} } @inproceedings{Galka, author = {Galka, Stefan}, title = {Integration and usage of simulation-based digital twins in internal logistics systems}, series = {IFAC Papers OnLine}, volume = {59}, booktitle = {IFAC Papers OnLine}, number = {10}, publisher = {Elsevier}, doi = {10.1016/j.ifacol.2025.09.152}, pages = {897 -- 902}, abstract = {This paper presents the workflows of Digital Twins in practice, with reference to three case studies. The objective is to present the processing of data and information flow. The most essential requirements for the design of a Digital Twin are synthesized from the case studies and a layer model is presented, which was developed based on the three case studies. The model consists of four functional layers and an overarching data- and workflow-management-backbone. A front-end layer is proposed for communication with the end user.}, language = {en} } @inproceedings{SchwaegerlUhrig, author = {Schw{\"a}gerl, Felix and Uhrig, Sabrina}, title = {Tool Support for the Evaluation of Matching Algorithms in the Eclipse Modeling Framework}, series = {Proceedings of the 1st International Conference on Model-Driven Engineering and Software Development, February 19-21, 2013, in Barcelona, Spain, Vol. 1}, booktitle = {Proceedings of the 1st International Conference on Model-Driven Engineering and Software Development, February 19-21, 2013, in Barcelona, Spain, Vol. 1}, publisher = {SciTePress - Science and and Technology Publications}, isbn = {978-989-8565-42-6}, issn = {2184-4348}, doi = {10.5220/0004310801010110}, pages = {101 -- 110}, abstract = {In the field of model-driven development, sophisticated support for comparing model versions is urgently needed. Unfortunately, algorithms for model matching have been rarely evaluated so far. This paper deals with two extensions to the Eclipse Modeling Framework (EMF) that facilitate the evaluation of matching algorithms for EMF models, with the goal to combine user involvement and automated testing in the evaluation process. First a tree editor is presented that allows for the manual and semi-automated creation of match models which formalize the intended matching result. Second a benchmarking procedure is implemented which - given the intended match and the actual results of matching algorithms - automatically derives the number of a and b errors in a target-performance comparison. These results are valuable for drawing conclusions about the specific qualities of matching algorithms or for finding an adequate set of parameters for a configurable algorithm.}, language = {en} } @inproceedings{BuchmannSchwaegerl, author = {Buchmann, Thomas and Schw{\"a}gerl, Felix}, title = {Using Meta-code Generation to Realize Higher-order Model Transformations}, series = {Proceedings of the 8th International Joint Conference on Software Technologies, July 29-31, 2013, in Reykjav{\´i}k, Iceland, Vol. 1}, booktitle = {Proceedings of the 8th International Joint Conference on Software Technologies, July 29-31, 2013, in Reykjav{\´i}k, Iceland, Vol. 1}, publisher = {SciTePress - Science and and Technology Publications}, isbn = {978-989-8565-68-6}, doi = {https://doi.org/10.5220/0004522305360541}, pages = {536 -- 541}, abstract = {Model-driven engineering is a wide-spread paradigm in modern software engineering. During the last couple of years, many tools and languages have been developed, which are especially designed for model transformations — a discipline which is needed in many model-driven engineering approaches. While most of the existing model-to-model tools and languages are tailored towards batch transformations for specific model instances, they lack support for generic transformation problems, where the metamodel is unknown beforehand. In this paper we present a two-step meta-code generation approach that derives a metamodel-specific modelto- model transformation from a model-to-text transformation. The approach has been successfully applied to the problem of product derivation in model-driven software product lines.}, language = {en} } @incollection{Mauerer, author = {Mauerer, Wolfgang}, title = {Quantum Software = Quantum minus Software?}, series = {Dagstuhl Reports : Quantum Software Engineering : Report from Dagsthul Seminar 24512}, volume = {14}, booktitle = {Dagstuhl Reports : Quantum Software Engineering : Report from Dagsthul Seminar 24512}, number = {12}, editor = {Ali, Shaukat and Barzen, Johanna and Delgado, Andrea and M{\"u}ller, Hausi A. and Murillo, Juan Manuel}, publisher = {Dagstuhl Publishing}, doi = {10.4230/DagRep.14.12.63}, url = {http://nbn-resolving.de/urn:nbn:de:0030-drops-230469}, pages = {73 -- 74}, abstract = {The Dagstuhl Seminar 24512 on "Quantum Software Engineering" was held from December 15 to 20, 2024. It brought together 26 participants from industry and academia from 13 different countries, including senior and junior researchers as well as practitioners in the field of Quantum Software Engineering. The aim of the seminar was to advance software engineering methods and tools for the engineering of hybrid quantum systems by promoting personal interaction and open discussion among researchers who are already working in this emerging area of knowledge. The first day of the seminar was devoted to the topic "When software engineering meets quantum mechanics", while the second day focused on "Quantum software engineering and its challenges." During both days, 16 invited presentations were given. The rest of the seminar was organized into three working groups to address the topics "Quantum Software Design, Modelling and Architecturing", "Adaptive Hybrid Quantum Systems", and "Quantum Software Quality Assurance". The seminar was a very fruitful experience for all participants both in terms of scientific outcomes and in terms of the personal relationships that were generated to jointly address future experiences.}, language = {en} }