TY - GEN A1 - Kratzer, Simon A1 - Strahringer, Susanne A1 - Westner, Markus T1 - Fractional CIOs in SMEs BT - Study Results on an Emerging IT Leadership Model T2 - 2024 2nd International Conference on Management Information Systems (ICMIS 2024), September 28-30, 2024, Tokyo, Japan N2 - To remain competitive, small and medium-sized enterprises (SMEs) need to man-age information technology (IT) effectively. Unlike larger organisations, SMEs often face limited resources and challenges in attracting talent, and typically lack the need for a full-time Chief Information Officer (CIO). In response, a growing number of professionals around the world are offering CIO services on a part-time, shared basis to multiple clients. This model provides SMEs with affordable and flexible access to experienced IT leadership. Known as 'fractional CIOs', these professionals deliver significant value, yet there has been little academic re-search into this phenomenon. Our study, conducted between 2020 and 2023 with 62 Fractional CIOs in 10 countries, aims to fill this gap. It provides a clear defini-tion of fractional CIOs, outlines their engagement models and identifies the key factors that contribute to their success. The findings are intended to enlighten both academics and industry professionals. KW - Fractional CIO KW - Strategic IT Management KW - SME Y1 - 2024 VL - 2 ER - TY - GEN A1 - Weiss, Nils A1 - Pozzobon, Enrico T1 - IOT Backdoors in Cars T2 - IT Security Conference Troopers19, 2019, Heidelberg, Germany N2 - Connecting cheap IoT devices to the safety-critical network of a car can be an extremely bad idea, but at least it allows us to hack together our own automotive gadget. This talk explains the complete procedure involved in transforming a cheap OBD GSM dongle designed for fleet management into a open source automotive hacking tool. First, the hardware reverse engineering is demonstrated, showing how each component is interconnected and working together. With this knowledge, it was possible to capture the communication of the GSM module and understand the OTA protocol used by this dongle, which can be used to extract the firmware. A quick reverse engineering of the software will show that no cryptographic authentication is used for the OTA updates, and therefore a pirate GSM BTS can be used to obtain remote code execution. After that, a new open source firmware is written for the device, which can easily be extended and controlled remotely with the LUA scripting language. Examples on how hacking this dongle remotely can affect the safety of the driver will be also given. Y1 - 2019 UR - https://troopers.de/troopers19/agenda/mud7fn/ ER - TY - GEN A1 - Weiss, Nils A1 - Pozzobon, Enrico T1 - Automotive Penetration Testing with Scapy T2 - IT Security Conference Troopers19, 2019, Heidelberg, Germany N2 - This talk will provide a general overview on how Scapy can be used for automotive penetration testing. All present features of Scapy for automotive penetration will be introduced and explained. Also an overview of higher level automotive protocols will be given. As automotive penetration testing becomes more important, the lack of free tools for automotive network penetration testing led us to integrate new features in Scapy. Scapy is a well established framework for packet manipulation. The flexibility of Scapy allowed us to implement automotive interfaces (CAN) and automotive protocols (ISOTP, GMLAN, UDS, DoIP, OBD-II). This talk explains the basics of these automotive protocols, the workflow with Scapy for automotive network penetration testing. A live demonstration with some embedded hardware will be given. Y1 - 2019 UR - https://www.youtube.com/watch?v=7D7uNqPWrXw UR - https://troopers.de/downloads/troopers19/TROOPERS19_NGI_RT_Automotive_PenTesting_with_Scapy.zip ER - TY - GEN A1 - Mauerer, Wolfgang A1 - Wagner, Daniel T1 - Cyclic Tests Unleashed: Large-Scale RT Analysis with Jitterdebugger T2 - Open Source Summit Japan (Tokio) and OSSNA 17.07.2019 Y1 - 2019 UR - https://events19.linuxfoundation.org/wp-content/uploads/2018/07/talk.pdf ER - TY - CHAP A1 - Selgrad, Kai A1 - Lier, Alexander A1 - Köferl, Franz A1 - Stamminger, Marc A1 - Lohmann, Daniel ED - Kästner, Christian ED - Gokhālé, Anirüddhā T1 - Lightweight, Generative Variant Exploration for High-performance Graphics Applications T2 - GPCE'15 : Proceedings of the 2015 ACM SIGPLAN International Conference on Generative Programming: Concepts and Experiences ; October 26-27, 2015, Pittsburgh, PA, USA N2 - Rendering performance is an everlasting goal of computer graphics and significant driver for advances in both, hardware architecture and algorithms. Thereby, it has become possible to apply advanced computer graphics technology even in low-cost embedded appliances, such as car instruments. Yet, to come up with an efficient implementation, developers have to put enormous efforts into hardware/problem-specific tailoring, fine-tuning, and domain exploration, which requires profound expert knowledge. If a good solution has been found, there is a high probability that it does not work as well with other architectures or even the next hardware generation. Generative DSL-based approaches could mitigate these efforts and provide for an efficient exploration of algorithmic variants and hardware-specific tuning ideas. However, in vertically organized industries, such as automotive, suppliers are reluctant to introduce these techniques as they fear loss of control, high introduction costs, and additional constraints imposed by the OEM with respect to software and tool-chain certification. Moreover, suppliers do not want to share their generic solutions with the OEM, but only concrete instances. To this end, we propose a light-weight and incremental approach for meta programming of graphics applications. Our approach relies on an existing formulation of C-like languages that is amenable to meta programming, which we extend to become a lightweight language to combine algorithmic features. Our method provides a concise notation for meta programs and generates easily sharable output in the appropriate C-style target language. KW - exploratory programming KW - general purpose code generation KW - prototyping KW - ray tracin Y1 - 2015 UR - https://selgrad.org/publications/2015_gpce_SLKSL.pdf SN - 978-1-4503-3687-1 SP - 141 EP - 150 PB - ACM CY - New York, USA ER - TY - CHAP A1 - Lier, Alexander A1 - Martinek, Magdalena A1 - Stamminger, Marc A1 - Selgrad, Kai T1 - A High-Resolution Compression Scheme for Ray Tracing Subdivision Surfaces with Displacement T2 - Proceedings of the ACM on Computer Graphics and Interactive Techniques N2 - Subdivision surfaces, especially with displacement, are one of the key modeling primitives used in high-quality rendering environments, such as, e.g., movie production. While their use easily maps to rasterization-based frameworks, they pose a significant challenge for ray tracing environments. This is due to the fact that incoherent access patterns require storing or caching fully tessellated and displaced meshes for efficient intersection computations. In this paper we use a two-tier hierarchy built on a scene's patches. It relies on compressed and quantized bounding volumes on the second tier to reduce the size of the BVH itself. Based on this acceleration structure, we propose a quantized, compact approximation for leaf nodes while being faithful to the underlying patch-geometry. We build on recent advances and present a system that shows competitive performance regarding run-time speed, which is close to full-resolution pre-tessellation methods as well as to previous compression approaches. Ultimately, we provide strong compression of up to a factor of 5: 1 compared to state-of-the-art methods while maintaining high geometrical fidelity surpassing similarly compact approximations and getting close to uncompressed geometry. KW - Displacement Mapping KW - omputing methodologies KW - Parametric curve and surface models KW - Production Rendering KW - ray tracing KW - Subdivision Surfaces Y1 - 2018 U6 - https://doi.org/10.1145/3233308 VL - 1 IS - 2 SP - 1 EP - 17 PB - The Association for Computers in Mathematics and Science Teaching ER - TY - JOUR A1 - Bary, Benedikt von A1 - Westner, Markus A1 - Strahringer, Susanne T1 - How decision maker's personal preferences influence the decision to backsource IT services JF - Journal of Information Technology Management (JITM) N2 - To prepare their IT landscape for future business challenges, companies are changing their IT sourcing arrangements by using selective sourcing approaches as well as multi-sourcing with more but smaller sourcing contracts. Companies therefore have to reconsider and re-evaluate their IT sourcing setup more frequently. Collecting data from 251 global experts, we empirically tested the effect of service quality, relationship quality, and switching costs on IT sourcing decisions using partial least squares (PLS) analysis. Drawing on previously conducted expert interviews, our model extends previous studies and introduces a decision maker’s sourcing preferences as a not yet examined moderator on IT sourcing decisions. This allows us to investigate the influence of the decision maker’s beliefs on the decision process. We were able to confirm the negative effect of switching costs on a decision in favor of backsourcing, however we could not find significant support for the remaining hypotheses. We further discuss potential reasons for our findings and suggest future research opportunities based on our contribution. KW - Outsourcing KW - Backsourcing KW - back-in-house KW - information technology KW - partial least squares Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-233 UR - https://jitm.ubalt.edu/XXX-3/article1.pdf VL - 30 IS - 3 SP - 1 EP - 22 ER - TY - CHAP A1 - Bock, Sebastian A1 - Weiß, Martin Georg T1 - Non-Convergence and Limit Cycles in the Adam Optimizer T2 - Proceedings of the 28th International Conference on Artificial Neural Networks, 2019, Munich, Germany, September 17-19 N2 - One of the most popular training algorithms for deep neural networks is the Adaptive Moment Estimation (Adam) introduced by Kingma and Ba. Despite its success in many applications there is no satisfactory convergence analysis: only local convergence can be shown for batch mode under some restrictions on the hyperparameters, counterexamples exist for incremental mode. Recent results show that for simple quadratic objective functions limit cycles of period 2 exist in batch mode, but only for atypical hyperparameters, and only for the algorithm without bias correction. We extend the convergence analysis to all choices of the hyperparameters for quadratic functions. This finally answers the question of convergence for Adam in batch mode to the negative. We analyze the stability of these limit cycles and relate our analysis to other results where approximate convergence was shown, but under the additional assumption of bounded gradients which does not apply to quadratic functions. The investigation heavily relies on the use of computer algebra due to the complexity of the equations. KW - Adam optimizer KW - Convergence KW - Computer algebra KW - Dynamical system KW - Limit cycle KW - Neuronales Netz KW - Maschinelles Lernen KW - Optimierungsalgorithmus KW - Konvergenz 〈Informationstechnik〉 KW - Computeralgebra Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-490 UR - https://doi.org/10.1007/978-3-030-30484-3_20 SP - 232 EP - 243 ER - TY - CHAP A1 - Strasser, Artur A1 - Westner, Markus T1 - Knowledge Transfer in IS Offshoring BT - Processes, Roles, and Success Factors T2 - Proceedings of the 19th Pacific Asia Conference on Information Systems (PACIS 2015) Singapore, July 5-9 N2 - IS offshoring research regarding knowledge transfer processes, roles involved, as well as influencing factors is characterized by its diverse and heterogeneous nature. Covering the last fifteen years of IS offshoring research, this paper provides a consolidated view of the field of study. It presents a generic knowledge transfer process consisting of four stages and five milestones. These stages are characterized and evaluated according to their relevance for knowledge transfer, the types of knowledge transferred, the main activities and methods for transfer and testing, as well as the goals pursued. Furthermore, we aggregate the diverse literature findings relating to individuals who facilitate knowledge transfer processes into a general role. We label this role “offshore coordinator” and present its core tasks and necessary skills. In addition, we identify and cluster core factors that influence success or failure of knowledge transfer. In summary, our study answers calls to discontinue with empirically derived definitions in favor of theory-based conceptualization of the IS offshoring research field with respect to knowledge transfer processes, roles, and success factors. Future studies can build on these results and examine questions with respect to particular characteristics of knowledge transfer processes and their influencing success and failure factors. KW - Offshoring KW - Knowledge transfer KW - Knowledge management KW - Information systems KW - Betriebliches Informationssystem KW - Offshoring KW - Wissensmanagement Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-835 UR - https://aisel.aisnet.org/cgi/viewcontent.cgi?article=1046&context=pacis2015 SP - 1 EP - 15 ER - TY - CHAP A1 - Bock, Sebastian A1 - Weiß, Martin Georg T1 - A Proof of Local Convergence for the Adam Optimizer T2 - Proceedings of the 2019 International Joint Conference on Neural Networks (IJCNN), 2019, Budapest, Hungary, July 14-19 N2 - Adaptive Moment Estimation (Adam) is a very popular training algorithm for deep neural networks, implemented in many machine learning frameworks. To the best of the authors knowledge no complete convergence analysis exists for Adam. The contribution of this paper is a method for the local convergence analysis in batch mode for a deterministic fixed training set, which gives necessary conditions for the hyperparameters of the Adam algorithm. Due to the local nature of the arguments the objective function can be non-convex but must be at least twice continuously differentiable. KW - Non-convex optimization KW - Adam optimizer KW - Convergence KW - Momentum method KW - Dynamical system KW - Fixed point KW - Neuronales Netz KW - Maschinelles Lernen KW - Optimierungsalgorithmus KW - Konvergenz 〈Informationstechnik〉 Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-501 UR - https://doi.org/10.1109/IJCNN.2019.8852239 VL - 2019 SP - 1 EP - 8 ER - TY - JOUR A1 - Könning, Michael A1 - Strahringer, Susanne A1 - Westner, Markus T1 - Unraveling the impact of cultural distance on IT outsourcing success BT - Insights from three major sourcing reconfigurations JF - Journal of Enterprise Information Management N2 - PURPOSE IT outsourcing (ITO) has developed into an established practice for organizations but the interorganizational and oftentimes international collaboration it involves comes at a price: Reports from academia and practice suggest that more than 25% of all ITO projects fail, many because of cultural differences between client and provider organizations. Against this background, this paper analyzes the complex nature of cultural distance and its multi-faceted effect on ITO success. DESIGN/METHODOLOGY/APPROACH This paper builds upon extant literature on culture on the national, organizational and team level, conceptualizes its effect on relationship quality and ITO success, and hypothesizes a model on potential moderators and management techniques to offset culture-induced challenges. It then evaluates and refines the model by means of an interpretive qualitative research design for an in-depth single-case study of ProSiebenSat.1 Media SE (P7S1), a leading European media company that reconfigured its IT sourcing model three times in 10 years. FINDINGS The results from interviews with top managers from client and provider organizations represent one of the first integrated views on the critical importance of cultural compatibility on multiple levels, provide manifold examples for its complex effect on ITO success, as well as moderators and potential management techniques to promote ITO success. RESEARCH LIMITATIONS/IMPLICATIONS This paper contributes relevant empirical insights to the growing body of literature on culture and its underestimated role in ITO success. It builds on tentative theory that is confirmed and refined. PRACTICAL IMPLICATIONS The paper helps in substantiating the complex and intangible nature of culture and demonstrates means for its effective management. ORIGINALITY/VALUE The results from interviews with top managers from client and provider organizations represent one of the first integrated views on the critical importance of cultural compatibility on multiple levels, provide manifold examples for its complex effect on ITO success, as well as moderators and potential management techniques to promote ITO success. KW - IT outsourcing KW - Offshoring KW - ITO Success KW - Cultural distance KW - Relationship quality KW - National culture KW - Organizational culture Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-8708 VL - 34 IS - 3 SP - 811 EP - 837 PB - Emerald ER - TY - JOUR A1 - Schönberger, Manuel A1 - Scherzinger, Stefanie A1 - Mauerer, Wolfgang T1 - Ready to Leap (by Co-Design)? Join Order Optimisation on Quantum Hardware JF - Proceedings of the ACM on Management of Data, PACMMOD N2 - The prospect of achieving computational speedups by exploiting quantum phenomena makes the use of quantum processing units (QPUs) attractive for many algorithmic database problems. Query optimisation, which concerns problems that typically need to explore large search spaces, seems like an ideal match for the known quantum algorithms. We present the first quantum implementation of join ordering, which is one of the most investigated and fundamental query optimisation problems, based on a reformulation to quadratic binary unconstrained optimisation problems. We empirically characterise our method on two state-of-the-art approaches (gate-based quantum computing and quantum annealing), and identify speed-ups compared to the best know classical join ordering approaches for input sizes that can be processed with current quantum annealers. However, we also confirm that limits of early-stage technology are quickly reached. Current QPUs are classified as noisy, intermediate scale quantum computers (NISQ), and are restricted by a variety of limitations that reduce their capabilities as compared to ideal future quantum computers, which prevents us from scaling up problem dimensions and reaching practical utility. To overcome these challenges, our formulation accounts for specific QPU properties and limitations, and allows us to trade between achievable solution quality and possible problem size. In contrast to all prior work on quantum computing for query optimisation and database-related challenges, we go beyond currently available QPUs, and explicitly target the scalability limitations: Using insights gained from numerical simulations and our experimental analysis, we identify key criteria for co-designing QPUs to improve their usefulness for join ordering, and show how even relatively minor physical architectural improvements can result in substantial enhancements. Finally, we outline a path towards practical utility of custom-designed QPUs. KW - Hardware KW - Quantum cmputation KW - Informations systems KW - Join algorithms Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-56634 N1 - Corresponding author: Manuel Schönberger VL - 1 IS - 1 SP - 1 EP - 27 PB - ACM CY - New York, NY, ER - TY - INPR A1 - Steffens, Oliver T1 - Leibniz, Llull and the Logic of Truth: Precursors of Artificial Intelligence N2 - Mankind has always been confronted with limited knowledge about Nature and many people devoted their lives and intellects to the very question: How to gain knowledge, confirm ideas and theories, and understand the world we live in? Religion was one fundamental base for explanations and existential questions. Philosophy and Science were the other. Nowadays, science and technology dominate our daily lives, religion and metaphysics have lost their former dominance, while our thoughts and factual knowledge are increasingly governed by the digitised versions of conversation and discussion, filtered and guided by the algorithms of social networks. Today, "artificial intelligence" is a phenomenon in information technology which takes over everyday routines. A new ideal, a new promise, and at the same time used as a stratagem by political and economic systems to guide and manipulate our thinking, values, and behaviour. But nothing is so new that one could not find its precursors in earlier times. Science and mathematics has kindled many brilliant ideas. Can we describe the world by numbers, find truth and explanation in mathematical structures? This essay is devoted to early ideas by the medieval philosopher Ramón Llull, the great rationalist G.W. Leibniz, and early approaches to combinations, number theory. and information processing. Llull's thinking machine and subsequent endeavours to find methods of mechanical reasoning and inference paved the way to modern-day concepts of artificial intelligence. KW - artificial intelligence KW - Leibniz KW - Ramón Llull KW - thinking machine KW - combinatorics KW - number theory KW - Giordano Bruno KW - Turing machine KW - Ars Magna KW - logic Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-58399 CY - Regensburg ER - TY - JOUR A1 - Käss, Sebastian A1 - Strahringer, Susanne A1 - Westner, Markus T1 - Practitioners’ Perceptions on the Adoption of Low Code Development Platforms JF - IEEE Access N2 - Organizations are under increasing pressure to develop applications within budget and time at high quality. Therefore, multiple organizations adopt Low Code Development Platforms (LCDP) to develop applications faster and cheaper compared to traditional application development. However, current research on LCDP adoption lacks empirical grounding as well as a deeper understanding of the importance of adoption drivers and inhibitors. We conducted semi-structured interviews and a Delphi study with seventeen experts to address these gaps. As a result, we identified twelve drivers and nineteen inhibitors for adopting LCDPs. We show that the experts have a consensus on the most and the least important drivers and inhibitors for LCDP adoption. Yet, the ranking of the drivers and inhibitors between the most and least important is highly context dependent. For some drivers and inhibitors, the experts’ ranking is similar to academic literature, whereas, for others, it differs. In conclusion, the study at hand empirically validates drivers and inhibitors for LCDP adoption, adds six new drivers and six new inhibitors to the body of knowledge, and analyses the importance of these factors. KW - Low code KW - Delphi Study KW - Software Development KW - Inhibitor KW - Driver Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-59170 SN - 2169-3536 N1 - Corresponding author: Markus Westner PB - IEEE ER - TY - THES A1 - Großmann, Christoph T1 - Extending SQL for Machine Learning N2 - As machine learning becomes ever more popular, the question of how to enable it on ever more platforms becomes more important. This thesis explores the extension of SQL and extension databases for machine learning. For this purpose, a framework for extending the Exasol database for machine learning is created. This framework uses the existing support for scripting languages and the in-database file system of the Exasol database to integrate existing machine-learning libraries into SQL. Currently, only Scikit-Learn was integrated. The focuses of our framework are simplicity, usability, smooth integration in SQL, and expressive power, while runtime efficiency and speed are only secondary focuses. Further benefits of the framework are reduction of communication overhead, increased data security, simplification of data synchronization, and the usage of core database strengths. Compared to other in-database machine learning approaches, Apache MADlib and Oracle Machine Learning, our framework most likely has inferior speed and efficiency, while having the advantage of using well-integrated and tested libraries. This thesis also provides an overview of related work on extending SQL and databases for machine learning. Furthermore, future directions for our framework are discussed. The created framework is freely available at https://github.com/christoph-grossmann/Exasol_DB_ML_Framework. KW - SQL KW - Machine Learning KW - Database KW - Exasol KW - Maschinelles Lernen KW - SQL KW - Datenbank Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-60595 CY - Regensburg ER - TY - CHAP A1 - Stadler, Timo A1 - Hofmeister, Simon A1 - Dünnweber, Jan T1 - A Method for the Optimized Placement of Bus Stops Based on Voronoi Diagrams T2 - Proceedings of the 55th Hawaii International Conference on System Sciences (HICSS55): January 3-7, 2022, Maui, Hawaii, USA N2 - In this paper a new method for placing bus stops is presented. The method is suitable for permanently installed new bus stops and temporarily chosen collection points for call busses as well. Moreover, our implementation of the Voronoi algorithm chooses new locations for bus stops in such a way that more bus stops are set in densely populated areas and less in less populated areas. To achieve this goal, a corresponding weighting is applied to each possible placement point, based on the number of inhabitants around this point and the points of interest, such as medical centers and department stores around this point. Using the area of Roding, a small town in Bavaria, for a case study, we show that our method is especially suitable for for rural areas, where there are few multi-family houses or apartment blocks and the area is not densely populated. KW - rural mobility KW - transportation KW - voronoi KW - bus stop placement KW - Location Intelligence Research in System Sciences Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-21214 SP - 5686 EP - 5694 ER - TY - JOUR A1 - Maier, Robert A1 - Schlattl, Andreas A1 - Guess, Thomas A1 - Mottok, Jürgen T1 - CausalOps - Towards an industrial lifecycle for causal probabilistic graphical models JF - Information and Software Technology N2 - Context: Causal probabilistic graph-based models have gained widespread utility, enabling the modeling of cause-and-effect relationships across diverse domains. With their rising adoption in new areas, such as safety analysis of complex systems, software engineering, and machine learning, the need for an integrated lifecycle framework akin to DevOps and MLOps has emerged. Currently, such a reference for organizations interested in employing causal engineering is missing. This lack of guidance hinders the incorporation and maturation of causal methods in the context of real-life applications. Objective: This work contextualizes causal model usage across different stages and stakeholders and outlines a holistic view of creating and maintaining them within the process landscape of an organization. Method: A novel lifecycle framework for causal model development and application called CausalOps is proposed. By defining key entities, dependencies, and intermediate artifacts generated during causal engineering, a consistent vocabulary and workflow model to guide organizations in adopting causal methods are established. Results: Based on the early adoption of the discussed methodology to a real-life problem within the automotive domain, an experience report underlining the practicability and challenges of the proposed approach is discussed. Conclusion: It is concluded that besides current technical advancements in various aspects of causal engineering, an overarching lifecycle framework that integrates these methods into organizational practices is missing. Although diverse skills from adjacent disciplines are widely available, guidance on how to transfer these assets into causality-driven practices still need to be addressed in the published literature. CausalOps’ aim is to set a baseline for the adoption of causal methods in practical applications within interested organizations and the causality community. KW - Causal engineering KW - Model lifecycle KW - MLOps KW - Causal graphical models Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-73350 SN - 0950-5849 N1 - Corresponding author der OTH Regensburg: Robert Maier PB - Elsevier ER - TY - CHAP A1 - Staufer, Susanne A1 - Hauser, Florian A1 - Ezer, Timur A1 - Grabinger, Lisa A1 - Nadimpalli, Vamsi Krishna A1 - Röhrl, Simon A1 - Bugert, Flemming A1 - Bittner, Dominik A1 - Mottok, Jürgen T1 - EVALUATION OF THE LEARNING MANAGEMENT SYSTEM PYTHIA T2 - EDULEARN Proceedings: 16th International Conference on Education and New Learning Technologies, Palma, Spain. 1-3 July, 2024 N2 - Learning management systems gain importance due to the Corona pandemic. To personalize such a learning management system, a Moodle adaption named Pythia was created. Pythia is implemented as a Moodle plugin solution. The possibility of generating learning paths with various algorithms and the change of the graphical user interface is significant. Learning paths are generated with two different algorithms. Nestor algorithm generates learning paths with a Bayesian network, while Tyche algorithm uses a Markov model. The graphical user interface is adapted to the generated learning paths where learning element symbols are customized and the individual learning paths are depicted. This paper presents the results of a qualitative survey among German students with the aim of evaluating the first version of the learning management system Pythia. 25 students took the subject “Software Engineering for Safe and Secure Systems” in the winter term of 2023/24. The 68 asked questions focus on usage behavior, graphical user interface, usability, preferences, volume, and quality of learning elements, and learning paths. Our Moodle course for the lecture contains seven sections, each section has minimum one subsection on which the learning path is calculated. Last three sections are designed by presenting minimum one learning element of each learning element category except the collaboration tool. In a previous work, ten learning element categories were designed and evaluated comprising manuscript, brief overview, learning goal, quiz, exercise, summary, three types of additional material, and collaboration tool. The first sections are left as they are initially designed by the lecturer (normal section). The survey considers the difference between normal sections and diverse sections. Furthermore, the generated learning paths are evaluated. 13 students undertook Nestor learning paths, whereas 12 undertook Tyche learning paths. The results suggest that for the majority of students, the learning element symbols are well-chosen. Moreover, all students wish the elements relevant to the exam to be labelled. 23 students are overwhelmed by the number of learning elements in the last sections of the Moodle course. In the future, some suggestions will be implemented such as the labelling of exam relevant learning elements. To overcome the overload of learning elements, a strategy could be developed like hiding learning elements not preferred by the learning path algorithm. KW - Learning management system (LMS) KW - questionnaire (study) KW - learning elements KW - learning paths KW - usability KW - graphical user interface (GUI) KW - Moodle KW - higher education area (HEA) Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-73474 SN - 2340-1117 SP - 9089 EP - 9098 PB - IATED ER - TY - CHAP A1 - Hantsch, Carolin A1 - Westner, Markus T1 - Governance of IT/OT Convergence: A Review of Academic and Practitioner Literature T2 - 16th Mediterranean Conference on Information Systems (MCIS) 2024, Proceedings, October 3rd to 5th, 2024, Porto, Portugal N2 - The convergence, i.e., integration, of Information Technology (IT) and Operational Technology (OT) is a critical aspect of digital transformation in industries, driving efficiency, innovation, and competitive advantage. However, this integration also introduces significant challenges, particularly in governance. This paper presents a comprehensive literature review of IT/OT convergence, focusing on the governance challenges and strategies drawn from both academic and practitioner literature. The findings reveal that effective governance is crucial for successful IT/OT convergence, requiring clear definitions of roles and responsibilities, cross-functional collaboration, and a unified approach to mitigate risks and align organizational goals. Key IT/OT convergence governance strategies include establishing a Center of Excellence, adopting a risk-based approach, and fostering a culture of change. The paper highlights the need for further research to develop comprehensive governance frameworks and empirically examine the impact of governance on IT/OT convergence success. This paper provides valuable insights for both researchers and practitioners navigating the complexities of IT/OT convergence and governance in the era of Industry 4.0. KW - IT/OT Convergence KW - Governance KW - Digital Transformation KW - Industry 4.0 Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-78335 UR - https://aisel.aisnet.org/mcis2024/7/ SN - 978-989-33-6886-2 PB - AIS eLibrary ER - TY - CHAP A1 - Grabinger, Lisa A1 - Mottok, Jürgen T1 - On selecting hypothesis tests for group differences T2 - ICERI2024 Proceedings: 17th Annual International Conference of Education, Research and Innovation, 11th-13th November 2024, Seville, Spain N2 - Deciding on the right method of analyzing empirical research data can be difficult – especially when it comes to choosing specific methods of inferential statistics, where there is often not one right way, but a variety of valid options (e.g., using an ANOVA or its non-parametric alternative for data that is not perfectly normally distributed). Novice researchers not only lack the experience to know when a particular hypothesis test is appropriate, but struggle to find suitable literature to familiarize themselves (i.e., literature that is not too superficial, yet comprehensible). With the present article we provide a remedy following the didactic method of scaffolding: We present a systematization of the most elementary inferential statistical methods, namely hypothesis tests for group differences. We start by explaining basic terms (e.g., independent variable) and then give step-by-step instructions for choosing a proper hypothesis test based on data properties, implementing it from scratch, and reporting or interpreting its results. With these practical cookbook-like guidelines, this article serves as a concise starting point for young researchers entering the field of empirical research, as a valuable resource for their instructors, and as a basis for automating statistical procedures in a software system. KW - empirical research KW - data analysis KW - inferential statistics KW - guidelines Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-78200 SP - 702 EP - 712 PB - IATED ER - TY - CHAP A1 - Späth, Carina A1 - Westner, Markus T1 - Challenges in Agile Transformations: A Comprehensive Review T2 - 16th Mediterranean Conference on Information Systems (MCIS) 2024, Proceedings, October 3rd to 5th, 2024, Porto, Portugal N2 - This paper investigates the challenges organizations face during agile transformations, a critical adaptation in today's fast-paced business environment. Despite the potential benefits, many companies struggle with the implementation of agile methodologies. Through a systematic literature review of recent publications, we identify and categorize 19 challenges into three main areas: people, leadership, and organisation/processes. Our findings highlight that the most significant issues arise within the 'people' category, including plan-driven thinking, lack of knowledge, and inefficient collaboration. Leadership challenges involve insufficient management support and cultural mismatches, while organisation/process-related issues encompass inadequate planning and coordination. By synthesizing these challenges, this study provides a comprehensive overview aimed at helping practitioners anticipate and mitigate potential obstacles, thereby increasing the likelihood of successful agile transformations. These insights extend existing knowledge and emphasize the need for a holistic approach to manage the people, the leadership, and the organisation/process challenges of agile transformation. KW - agile methodologies KW - agile transformation KW - change management KW - organizational challenges Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-78320 UR - https://aisel.aisnet.org/mcis2024/32/ UR - 978-989-33-6886-2 PB - AIS eLibrary ER - TY - CHAP A1 - Westner, Markus A1 - Cuesta Gorostidi, Irene A1 - Gutierrez Rodriguez, Uxue A1 - Oyarbide-Zubillaga, Aitor A1 - Fernández Rodríguez, Isabel T1 - Enhancing work-based learning through the i-wobal project and its digital school of work-based learning (WBL) facilitators T2 - 17th annual International Conference of Education, Research and Innovation (ICERI2024), Seville, Spain. 11-13 November, 2024 N2 - The i-WOBAL project, supported by Erasmus+, strategically enhances work-based learning (WBL) in higher education and vocational training across Europe, with a particular focus on supporting the professional development of company and academic facilitators of students engaged in WBL environments. This initiative launches the i-WOBAL didactical guide, together with the establishment of the digital school of WBL facilitators, a digital learning space designed to translate the theoretical framework of the guide into practical, actionable strategies for facilitators. The project is the result of the coordinated work of a consortium of 7 higher education and vocational training institutions from 5 different European countries. The digital school of WBL facilitators serves as a training hub where facilitators from both academic institutions and the business sector receive specialised training to effectively guide and support students. The digital school offers a structured curriculum, including modules on relevant soft skills, to ensure that facilitators are well equipped to manage and enhance the WBL experience for students. This paper describes the curriculum and pedagogical approaches of the digital school of WBL facilitators, its role in facilitating the practical application of WBL strategies and the collaboration of the partners to bring in their unique expertise. The collaborative nature of the i-WOBAL project, involving a consortium of European educational and corporate institutions, promotes a shared culture of best practice and continuous innovation in WBL. The potential scalability of this model offers significant implications for future educational policies aimed at standardising and improving the facilitation of WBL across different educational systems and market environments. KW - Work-Based Learning (WBL) KW - Professional Development KW - Educational Innovation KW - Mentorship in Education KW - Digital Training Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-78459 SN - 978-84-09-63010-3 SN - 2340-1095 PB - IATED CY - Sevilla ER - TY - CHAP A1 - Späth, Carina A1 - Westner, Markus T1 - Navigating Agile Transformations BT - Success Factors in German Companies T2 - SaudiCIS 2024 Proceedings:1st Saudi Conference on Information Systems, November 19 to 21, 2024, Dhahran, Saudi Arabia N2 - This study investigates how companies overcome challenges in agile transformations. Through interviews with ten experts from German companies across different industries, we identify key drivers, challenges, and success factors. Our findings reveal inefficiency, mimetic isomorphism, and competitive pressure as primary transformation drivers. We categorize challenges and solutions into people, organizational, and process-related factors, emphasizing the central role of human elements. The study presents 14 key success factors, with management involvement, commitment to agility, and strategic staffing emerging as crucial. These insights provide a framework for understanding and implementing agile transformations, offering guidance for organizations. Our results contribute to both theoretical understanding and practical application of agile methodologies in corporate settings. KW - Agile Transformation KW - Organizational Change KW - Success Factors KW - Change Management KW - Digital Transformation Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-78700 UR - https://aisel.aisnet.org/saudicis2024/46 PB - Association for Information Systems Electronic Library CY - Dhahran ER - TY - JOUR A1 - Westner, Markus A1 - Reicheneder, Matthias A1 - Matschi, Markus T1 - From Captive Centers to Global Integration BT - Organizational Models and Good Practices in Information Technology Nearshoring and Offshoring JF - Information Resources Management Journal N2 - Contemporary developments in virtual work and global talent management are transforming information technology (IT) nearshoring and offshoring practices, yet research on organizational responses remains limited. Through expert interviews with 33 IT executives (76% chief information officers) from Germany's top 500 companies, this article examines organizational models, strategies, and good practices in IT nearshoring and offshoring. It reveals a shift from traditional captive centers toward fully integrated global teams, enabling high-value task delivery and reflecting increased workforce maturity. Companies are expanding their operations driven by talent needs rather than cost savings, with success factors including employee integration and robust on-site management. This study contributes to theory and practice by providing a framework for understanding organizational models in global IT delivery and offering actionable insights for executives, emphasizing workforce integration over geographical separation. KW - Offshoring KW - Informationstechnik KW - Internationale Arbeitsteilung KW - Organisationsstruktur KW - IT-Nearshoring KW - IT-Offshoring KW - Global IT-Teams KW - Organizational Models KW - Distributed Work Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-80406 SN - 1533-7979 N1 - Corresponding author der OTH Regensburg: Markus Westner VL - 38 IS - 1 PB - IGI Global ER - TY - JOUR A1 - Grabinger, Lisa A1 - Hauser, Florian A1 - Mottok, Jürgen T1 - On the perception of graph layouts JF - Journal of Software: Evolution and Process N2 - In the field of software engineering, graph-based models are used for a variety of applications. Usually, the layout of those graphs is determined at the discretion of the user. This article empirically investigates whether different layouts affect the comprehensibility or popularity of a graph and whether one can predict the perception of certain aspects in the graph using basic graphical laws from psychology (i.e., Gestalt principles). Data on three distinct layouts of one causal graph is collected from 29 subjects using eye tracking and a print questionnaire. The evaluation of the collected data suggests that the layout of a graph does matter and that the Gestalt principles are a valuable tool for assessing partial aspects of a layout. KW - causal graphs KW - eye tracking KW - gestalt principles KW - graph layouts KW - modeling languages Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-62973 N1 - Corresponding author: Lisa Grabinger PB - Wiley ER - TY - JOUR A1 - Scharf, Anna A1 - Haug, Sonja A1 - Ritthaler, Markus A1 - Raptis, Georgios T1 - Chancen und Herausforderungen der Digitalisierung bei der Rehabilitation – Ergebnisse einer Befragung von Rehabilitationseinrichtungen JF - Die Rehabilitation: Zeitschrift für Praxis und Forschung in der Rehabilitation N2 - Ziel der Studie: Ziel der Studie ist die Messung des Stands der Digitalisierung und die mit einer Anbindung an die Telematikinfrastruktur verbundenen Chancen und Herausforderungen für Rehabilitationseinrichtungen. Methodik: Teilstandardisierte Online-Befragung bei Trägern von Rehabilitationseinrichtungen in Bayern (n=33). Der Fragebogen mit 36 Fragen beinhaltet eine leicht veränderte Skala auf Basis des „Electronic Medical Record Adoption Model (EMRAM)“. Ergebnisse: Der Digitalisierungsgrad wurde in 70 Prozent der Rehabilitationseinrichtungen mit Stufe 0 angegeben (Stufenmodell bis 7). Die Übermittlung patientenbezogener Daten (Eingang und Ausgang) erfolgt häufig analog, wohingegen die Verarbeitung innerhalb der Einrichtung in vielen Fällen bereits überwiegend digital ist. Beim Anschluss an die Telematikinfrastruktur wird hoher Aufwand bei der Installation, aber auch der Schulung des Personals und der Anpassung der Arbeitsorganisation gesehen. Schlussfolgerung: Durch Änderung der gesetzlich-finanziellen Lage in Deutschland eröffnen sich für Rehabilitationseinrichtungen neue Möglichkeiten einer verstärkten Digitalisierung. Hürden hängen mit Anforderungen an IT-Sicherheit, Schulung des Personals und sowie dem ebenfalls geringen Digitalisierungsstand bei Krankenhäusern und Ärzt*innen sowie Patient*innen zusammen, die eine digitale Datenübermittlung erschweren. T2 - Opportunities and Challenges of Digitalization in Rehabilitation: Results of a Survey of Rehabilitation Facilities KW - Patientenbezogene Daten KW - Digitalisierungsgrad KW - Telematikinfrastruktur KW - IT-Management Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-64726 N1 - Corresponding author: Sonja Haug VL - 62 IS - 5 SP - 299 EP - 307 PB - Thieme CY - Stuttgart ER - TY - CHAP A1 - Stadtler, Timo A1 - Nita, Spyro A1 - Dünnweber, Jan T1 - A Parallel Hybrid Genetic Search for the Capacitated VRP with Pickup and Delivery T2 - 34th International Workshop, LCPC 2021, Newark, DE, USA, October 13–14, 2021 N2 - In the realm of parallel computing, optimization plays a pivotal role in achieving efficient and scalable solutions. In this work, we present the parallelization of a hybrid genetic search for solving the Capacitated Vehicle Routing Problem with Pickup and Delivery (CVRPPD).It leverages the synergy between genetic algorithms and parallel computing to address the complex optimization problem. This hybrid algorithm combines a customized version of local search with a genetic algorithm to compute an effective solution. Our implementation makes use of the Message Passing Interface (MPI) for data distribution and parallel execution. In addition, we run multi-threaded processes on NVIDIA graphical processors using the CUDA technology, which further increases the computation speed and consequently minimizes the runtime. Parallelization also allows the best-improvement strategy to be used instead of the rst-improvement strategy while maintaining the same runtime. We store the resulting routes in a bus route database which we created as the basis of an extensive library of optimal routes for our specifc use case of optimizing bus routes in a rural area. The experimental results on real road data show that the parallel implementation of the Hybrid Genetic Search (HGS) achieves significant improvements in runtime over the sequential implementation above a certain problem size. We believe that our implementation of the parallel hybrid genetic search method can have a great in influence on optimization strategies in parallel computing and can also be applied to other subproblems of the VRP. KW - parallel computing KW - high-performance KW - route planning Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-69854 UR - https://opus4.kobv.de/opus4-oth-regensburg/frontdoor/deliver/index/docId/6985/file/duennweber_kentucky_2023.pdf ER - TY - JOUR A1 - Westner, Markus T1 - Low-Code/No-Code: Citizen Developers and the Surprising Future of Business Applications JF - HMD Praxis der Wirtschaftsinformatik Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-74906 SN - 1436-3011 SP - 1067 EP - 1069 PB - Springer Fachmedien CY - Wiesbaden ER - TY - JOUR A1 - Altmann, Matthias A1 - Schlegl, Peter A1 - Volbert, Klaus T1 - A low-power wireless system for energy consumption analysis at mains sockets JF - EURASIP Journal on Embedded Systems N2 - Introduction: Improving energy efficiency and reducing energy wastage is an important topic of our time. But it is quite difficult to figure out how much of our total electricity bill can be mapped to which device or at what time the device used it. We believe energy efficiency of normal households can be improved, if this kind of transparency would be available. In this article, we present a system for energy measurement at mains sockets to gain a transparent view of energy consumption for each device in a household. It consists of several smart energy measuring devices (SEMDs) that use a low-power radio protocol to dynamically build and connect to a radio network to transfer power usage date to a server. At the server, the data is stored and can be accessed via web interface. Results: Our primary goal was to build a back-end system for an energy metering platform with very low energy consumption. This platform can provide data for a variety of services that enables users (the consumers) to understand and improve their energy consumption behavior and increase overall energy efficiency of their households. KW - Low power KW - Smart grid KW - Smart home KW - Smart metering KW - Wireless system Y1 - 2017 U6 - https://doi.org/10.1186/s13639-016-0041-y N1 - Corresponding author: Peter Schlegl IS - 1 PB - Springer Nature ER - TY - CHAP A1 - Sailer, Andreas A1 - Schmidhuber, Stefan A1 - Deubzer, Michael A1 - Mottok, Jürgen T1 - Amalthea – Plattform für kontinuierliche, modellbasierte Entwicklung T2 - Tagungsband, 6th Embedded Software Engineering, Kongress 2013, 2. bis 6. Dezember 2013, Sindelfingen Y1 - 2013 SP - 538 EP - 544 ER - TY - JOUR A1 - Strasser, Artur A1 - Westner, Markus A1 - Strahringer, Susanne T1 - Knowledge transfer in IS offshoring BT - A Delphi study of the offshore coordinator role JF - Journal of Systems and Information Technology N2 - Purpose This paper aims to investigate the main tasks, necessary skills, and the implementation of the offshore coordinator’s role to facilitate knowledge transfer in information systems (IS) offshoring. Design/methodology/approach This empirical exploratory study uses the classical Delphi method that includes one qualitative and two quantitative rounds to collect data on IS experts’ perceptions to seek a consensus among them. Findings The participants agreed, with strong consensus, for a set of 16 tasks and 15 skills. The tasks focused primarily on relationship management and facilitating knowledge transfer on different levels. The set of skills consists of approximately 25 per cent “hard” skills, e.g. professional language skills and project management skills, and approximately 75 per cent “soft” skills, e.g. interpersonal and communication skills and the ability to deal with conflict. Two factors mainly influence implementing the offshore coordinator role: project size and the number of projects to be supported simultaneously. Practical implications The findings provide indications of how to define and fulfill this crucial role in practice to facilitate the knowledge transfer process in a positive way. Originality/value Similarities in previous research findings are aggregated to examine the intermediate role in detail from a consolidated perspective. This results in the first comprehensive set of critical tasks and skills assigned to the competency dimensions of the universal competency framework, demonstrating which and how many competency dimensions are critical. KW - Knowledge transfer KW - Delphi KW - IS offshoring KW - Offshoring coordinator KW - universal competency framework KW - Betriebliches Informationssystem KW - Offshoring KW - DV-Koordinator KW - Wissensmanagement Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-294 UR - https://doi.org/10.1108/JSIT-01-2018-0008 SN - 1328-7265 VL - 21 IS - 1 SP - 36 EP - 62 ER - TY - CHAP A1 - Greiner, Nina A1 - Lauer, Norina ED - Weber, Karsten ED - Haug, Sonja ED - Lauer, Norina ED - Meussling-Sentpali, Annette ED - Mohr, Christa ED - Pfingsten, Andrea ED - Raptis, Georgios ED - Bahr, Gudrun T1 - Informierte Einwilligung bei Aphasie T2 - Digitale Technik für ambulante Pflege und Therapie: Herausforderungen, Lösungen, Anwendungen und Forschungsperspektiven N2 - Nach einer Einführung in die Grundlagen der informierten Einwilligung werden Empfehlungen zur Durchführung zusammengefasst und Besonderheiten im Hinblick auf die Gestaltung des Einwilligungsprozesses bei Personen mit Aphasie herausgearbeitet. Zuletzt wird das aphasiefreundliche Vorgehen im Projekt DeinHaus 4.0 Oberpfalz kurz skizziert. KW - Informed consent KW - Aphasie KW - Versuchsperson KW - Logopädie KW - Digitalisierung KW - Informierte Einwilligung KW - Ethik KW - Forschung KW - Teletherapie Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-55107 SN - 978-3-8394-6235-5 SP - 137 EP - 154 PB - transcript CY - Bielefeld ET - 1. Aufl. ER - TY - BOOK A1 - Kellner, Florian A1 - Brabänder, Christian T1 - VBA mit Excel : Einführung für Betriebswirte N2 - Dieses Buch bietet eine anwendungsorientierte Einführung in die Programmierung mit Visual Basic for Applications (VBA) in Microsoft Excel. Es ermöglicht auch Einsteigern die selbstständige Lösung kleiner bis mittelgroßer Programmieraufgaben aus dem betriebswirtschaftlichen Alltag. Der Schwierigkeitsgrad der Inhalte ist überwiegend einfach gehalten, sodass Nutzer, die bereits grundlegende Tätigkeiten in MS Excel beherrschen, sich nach ihren jeweiligen Anforderungen entsprechend fortbilden können. Zahlreiche Praxisbeispiele und Übungen, die auf einem Windows-Betriebssystem entwickelt und getestet wurden, unterstützen das Lernen Schritt für Schritt und zeigen, wie hilfreich VBA durch Automatisierung und Individualisierung in jedem Büro sein kann. Y1 - 2019 SN - 9783662597408 U6 - https://doi.org/10.1007/978-3-662-59740-8 PB - Springer Gabler CY - Berlin ER - TY - JOUR A1 - Lauer, Norina T1 - Teletherapie – hat die Logopädie eine digitale Zukunft? JF - Forum Logopädie N2 - Teletherapie beinhaltet vielfältige synchrone und asynchrone Möglichkeiten zur digitalen Versorgung von PatientInnen. Die Videotherapie stellt hierbei ein wichtiges synchrones Angebot dar, mit dem das therapeutische Angebot erweitert werden kann. Internationale Studien und auch Studien aus Deutschland bestätigen das Potenzial des Einbezugs digitaler Maßnahmen in die therapeutische Versorgung. In diesem Beitrag werden die Ergebnisse einer qualitativen Studie präsentiert, in der die in der COVID-19-Krise gesammelten Erfahrungen von TherapeutInnen mit Videotherapie vorgestellt werden. KW - Logopädie KW - Telemedizin Y1 - 2020 U6 - https://doi.org/10.2443/skv-s-2020-53020200502 VL - 34 IS - 5 SP - 12 EP - 17 ER - TY - CHAP A1 - Scholz, Alexander-Wigbert K. A1 - Krenkel, Lars A1 - Terekhov, Maxim A1 - Friedrich, Janet A1 - Rivoire, Julien A1 - Köbrich, Rainer A1 - Wolf, Ursula A1 - Kalthoff, Daniel A1 - David, Matthias A1 - Wagner, Claus A1 - Schreiber, Laura Maria ED - Hirschel, Ernst Heinrich ED - Schröder, Wolfgang ED - Fujii, Kozo ED - Haase, Werner ED - Leer, Bram ED - Leschziner, Michael A. ED - Pandolfi, Maurizio ED - Periaux, Jacques ED - Rizzi, Arthur ED - Roux, Bernard ED - Shokin, Yurii I. ED - Klaas, Michael ED - Koch, Edmund ED - Schröder, Wolfgang T1 - Magnetic Resonance Imaging and Computational Fluid Dynamics of High Frequency Oscillatory Ventilation (HFOV) T2 - Fundamental Medical and Engineering Investigations on Protective Artificial Respiration N2 - In order to better understand the mechanisms of gas transport during High Frequency Oscillatory Ventilation (HFOV) Magnetic Resonance Imaging (MRI) with contrast gases and numerical flow simulations based on Computational Fluid Dynamics(CFD) methods are performed. Validation of these new techniques is conducted by comparing the results obtained with simplified models of the trachea and a first lung bifurcation as well as in a cast model of the upper central airways with results achieved from conventional fluid mechanical measurement techniques like e.g. Laser Doppler Anemometry (LDA). Further it is demonstrated that MRI of experimental HFOV is feasible and that Hyperpolarized 3He allows for imaging the gas re-distribution inside the lung. Finally, numerical results of oscillatory flow in a 3rd generation model of the lung as well as the impact of endotracheal tubes on the flow regime development in a trachea model are presented. KW - Central Airway KW - computational fluid dynamics KW - Computational Fluid Dynamics Simulation KW - Laser Doppler Anemometry KW - Magnetic Resonance Imaging Measurement Y1 - 2011 SN - 978-3-642-20325-1 U6 - https://doi.org/10.1007/978-3-642-20326-8_7 VL - 116 SP - 107 EP - 128 PB - Springer CY - Berlin, Heidelberg ER - TY - JOUR A1 - Busch, Ch. A1 - Daum, H. A1 - Raptis, Georgios T1 - Merkmal Iris. Können diese Augen lügen? JF - Spektrum der Wissenschaft KW - Biometrie KW - Mustererkennung KW - Iris KW - Regenbogenhaut Y1 - 2003 UR - https://www.spektrum.de/magazin/koennen-diese-augen-luegen/829906 IS - 7 SP - 81 EP - 82 ER - TY - GEN A1 - Raptis, Georgios T1 - Mögliche Auswirkungen der eIDAS-Verordnung auf die Telematikinfrastruktur und die eArztausweise BT - Vortrag T2 - CAST-Workshop PKI, Darmstadt, 29.01.2015 KW - Europäische Union KW - Telemedizin KW - eArztausweis KW - Elektronischer Arztausweis Y1 - 2015 ER - TY - BOOK A1 - Sauer, S. A1 - Wolf, Th. A1 - Buch, M. A1 - Raptis, Georgios T1 - Sichere Client-Server-Architekturen für E-Government BT - E-Government-Handbuch KW - Client-Server-Konzept KW - Datensicherheit KW - E-Government Y1 - 2004 ER - TY - GEN A1 - Raptis, Georgios T1 - HPCs als Basis für den elektronischen Arztausweis BT - Vortrag T2 - Smartcard-Workshops, Fraunhofer SIT, 07.02.2006 KW - Arzt KW - Ausweis KW - Hochleistungsrechnen Y1 - 2006 ER - TY - THES A1 - Raptis, Georgios T1 - Klassifikation, Anwendungen und Sicherheitskonzept von Trustcentern KW - Trust Center Y1 - 2004 ER - TY - GEN A1 - Raptis, Georgios T1 - Datenschutzfragen zur Telemedizin BT - Vortrag T2 - Fachtagung Datenschutz in der Medizin - Update 2015 I, Hamburg 03.02.2015 KW - Telemedizin KW - Datenschutz Y1 - 2015 ER - TY - JOUR A1 - Raptis, Georgios T1 - Kryptographischer Langzeitschutz JF - KES - The Information Security Journal KW - Kryptologie KW - Datensicherung Y1 - 2008 VL - 1 SP - 55 EP - 62 ER - TY - GEN A1 - Raptis, Georgios T1 - Übersicht über die neuen Technischen Richtlinien des BSI zum ersetzenden Scannen und zur Langzeitarchivierung BT - Vortrag T2 - Telemed 2014, Berlin, 14.10.2014 Y1 - 2014 ER - TY - GEN A1 - Raptis, Georgios T1 - Die elektronische Gesundheitskarte BT - Vortrag T2 - 7. Kommunikationsforum "Industry meets Medicine", Olpe, 5.11.2014 KW - Elektronische Gesundheitskarte Y1 - 2014 ER - TY - GEN A1 - Raptis, Georgios T1 - Vernetzung und ubiquitäre Informationsverarbeitung – technisch-organisatorischer Datenschutz in der Arztpraxis BT - Vortrag in der 2. Fachtagung der Gesellschaft für Datenschutz und Datensicherheit e.V. (GDD), Berlin, 13.05.2014, zertifiziert von der Ärztekammer Berlin T2 - 2. Fachtagung der Gesellschaft für Datenschutz und Datensicherheit e.V. (GDD), Berlin, 13.05.2014, zertifiziert von der Ärztekammer Berlin KW - Arztpraxis KW - Datenschutz Y1 - 2014 ER - TY - GEN A1 - Raptis, Georgios T1 - Sichere Gesundheitsdaten in der Cloud? Technische Voraussetzungen und Regelungen BT - Vortrag T2 - 8. Rhein-Main Zukunftskongress Krankenhaus & Partner 2014, Offenbach, 21.2.2014 KW - Cloud Computing KW - Gesundheitsinformationssystem KW - Datenschutz Y1 - 2014 ER - TY - GEN A1 - Raptis, Georgios T1 - Datenschutz und IT-Sicherheit: Empfehlungen von BÄK und KBV für Ärzte BT - Vortrag T2 - AK-Sicherheit des eco-Verband der deutschen Internetwirtschaft e.V., Köln, 06.05.2009 KW - Arztpraxis KW - Datenschutz KW - Datensicherheit Y1 - 2009 ER - TY - CHAP A1 - Raptis, Georgios T1 - Empfehlungen der BÄK zum Datenschutz im Praxisalltag, Darstellung unter technischen Aspekten BT - Vortrag im Rahmen der conhIT 2009, Berlin, 22.04.2009, zertifiziert von der Ärztekammer Berlin T2 - conhIT 2009, Berlin, 22.04.2009 KW - Arztpraxis KW - Datenschutz Y1 - 2009 ER - TY - JOUR A1 - Raptis, Georgios T1 - App statt Arzt ist kein gutes Motto BT - Interview JF - medizin & technik Y1 - 2013 UR - https://medizin-und-technik.industrie.de/medizin/mediziner-ueber-technik/app-statt-arzt-ist-kein-gutes-motto/ IS - 2 ER - TY - GEN A1 - Raptis, Georgios T1 - Papierlose Praxis & Digitalisierung BT - Vortrag T2 - 6. BMVZ-Praktikerkongress des Bundesverbands Medizinische Versorgungszentren - Gesundheitszentren - Integrierte Versorgung e.V, 12.09.2012 Berlin, zertifiziert von der Ärztekammer Berlin KW - Arztpraxis KW - Digitalisierung Y1 - 2012 ER - TY - CHAP A1 - Raptis, Georgios T1 - Health Professional eIDs vis-á-vis a Single Market Perspective BT - Vortrag T2 - European Health Telematics Association, Berlin, 25.10.2011 KW - eArztausweis KW - Elektronischer Arztausweis Y1 - 2011 ER - TY - GEN A1 - Raptis, Georgios T1 - Mobile Szenarien für Anwendungen der eGK BT - Vortrag T2 - CAST-Workshop Smartcards, Darmstadt, 25.09.2014 KW - Elektronische Gesundheitskarte Y1 - 2014 ER - TY - CHAP A1 - Rush, Logan A1 - Schmid, Marina A1 - Raptis, Georgios T1 - Privacy Challenges in Genomic Data: A Scoping Review of Risks, Mitigation Strategies, and Research Gaps. T2 - Information and Communication Technology: 13th International Symposium, SOICT 2024, Danang, Vietnam, December 13–15, 2024, Proceedings, Part II N2 - Advances in genomic research have created new privacy challenges. This scoping review analyzes the risks associated with the processing, storage, and sharing of genomic data including epigenetics, and examines current privacy protection strategies. It also attempts to identify research gaps in this area. Using the PRISMA methodology, 37 relevant studies were identified and analyzed. The results of the risk assessment can be grouped into four main themes: Risks posed by processing of functional genomic data, sharing of genomic data, patient (re-)identification, and dividuality, i.e. the extending of privacy risks to blood relatives. The identified risk mitigation strategies were systematically categorized into five classes: pre-release measures, governance, secure data processing and exchange, access restriction and transparency, anonymization and masking. However, there are some important research gaps that still need to be addressed. The current literature neglects to assess the likelihood of potential breaches and tends to focus only on assessing possible scenarios of privacy risks. It also mainly fails to assess the role of contextualized data and the effectiveness of policies and governance systems with respect to privacy risks. Y1 - 2025 U6 - https://doi.org/10.1007/978-981-96-4285-4_34 SP - 416 EP - 430 PB - Springer CY - Singapore ER - TY - JOUR A1 - Steinhauser, Stefanie A1 - Raptis, Georgios T1 - Design propositions for nudging in healthcare: Adoption of national electronic health recordsystems JF - Digital Health N2 - Objectives: Electronic health records (EHRs) are considered important for improving efficiency and reducing costs of ahealthcare system. However, the adoption of EHR systems differs among countries and so does the way the decision to par-ticipate in EHRs is presented. Nudging is a concept that deals with influencing human behaviour within the research streamof behavioural economics. In this paper, we focus on the effects of the choice architecture on the decision for the adoption ofnational EHRs. Our study aims to link influences on human behaviour through nudging with the adoption of EHRs to inves-tigate how choice architects can facilitate the adoption of national information systems. Methods: We employ a qualitative explorative research design, namely the case study method. Using theoretical sampling,we selected four cases (i.e., countries) for our study: Estonia, Austria, the Netherlands, and Germany. We collected and ana-lyzed data from various primary and secondary sources: ethnographic observation, interviews, scientific papers, homepages,press releases, newspaper articles, technical specifications, publications from governmental bodies, and formal studies. Results: The findings from our European case studies show that designing for EHR adoption should encompass choice archi-tecture elements (i.e., defaults), technical elements (i.e., choice granularity and access transparency), and institutional ele-ments (i.e., regulations for data protection, information campaigns, and financial incentives) in combination. Conclusions: Our findings provide insights on the design of the adoption environments of large-scale, national EHR systems.Future research could estimate the magnitude of effects of the determinants. KW - Health policies KW - national KW - information system KW - multihospital KW - electronic health records KW - doption KW - ealthcare systems Y1 - 2023 U6 - https://doi.org/10.1177/20552076231181208 SN - 2055-2076 VL - 9 SP - 1 EP - 12 PB - Sage ER - TY - JOUR A1 - Raptis, Georgios T1 - Technischer Datenschutz in der telemedizinischen Versorgung JF - Der Krankenhaus-JUSTITIAR N2 - Die fortschreitende Digitalisierung des Gesundheitswesens ebnet auch den Weg einer stärkeren Verbreitung der telemedizinischen Versorgung in Deutschland. Die Politik erleichtert diesen Weg, z.B. mit dem eHealth-Gesetz oder mit der Lockerung des "Fernbehandlungsverbots" durch den Deutschen Ärztetag. Dabei wird schon aus der Definition (siehe z.B. die unten stehende Definition der AG Telemedizin) klar, dass Telemedizin keine neue medizinische Disziplin begründet. Bei Telemedizin handelt es sich nur um ein technisches Werkzeug in Kombination mit geeigneten klinischen Prozessen, damit bestehende medizinische Expertise unter Einsatz von Informations- und Kommunikationstechnologien räumliche Entfernungen oder einen zeitlichen Versatz überbrücken kann. Patientinnen und Patienten können also behandelt werden, auch wenn sie vom Arzt räumlich entfernt sind. KW - Telemedizin KW - Datenschutz Y1 - 2018 VL - 7 IS - 4 SP - 105 EP - 107 ER - TY - RPRT A1 - Deglmann, Markus A1 - Ritthaler, Markus A1 - Raptis, Georgios T1 - Leitfaden für die Umsetzung des Reha-Konsils mittels HL7 FHIR BT - Projekt: Digitales Rehabilitationskonsil mit Anbindung an die Telematik-Infrastruktur N2 - Im Rahmen eines Forschungsprojektes soll eine Plattform für die Vermittlung von Telekonsilen und die Bereitstellung einer Konsilakte an die Telematik-Infrastruktur (TI) angeschlossen werden. Um sowohl eine bestmögliche Skalierbarkeit als auch eine optimale Integrierbarkeit in bestehende Systeme und Anwendungen zu erreichen, wurde HL7 FHIR als syntaktischer Standard für das Reha-Konsil festgelegt. Dieses Dokument liefert einen systematischen Überblick über die notwendigen Schritte und Voraussetzungen, um diesen Anschluss zu bewerkstelligen. Y1 - 2022 U6 - https://doi.org/10.13140/RG.2.2.25217.33120 ER - TY - CHAP A1 - Haug, Sonja A1 - Raptis, Georgios A1 - Weber, Karsten ED - Weber, Karsten ED - Haug, Sonja ED - Lauer, Norina ED - Mohr, Christa T1 - Einstellung zu Datenschutz und Wahrnehmung von Datensicherheit im Gesundheitsbereich BT - Die Sicht der Stakeholder*innen und der Bevölkerung T2 - Digitale Technik für ambulante Pflege und Therapie III : Nutzung Akzeptanz Wirkung und Lebensqualität T3 - Regensburger Beiträge zur Digitalisierung des Gesundheitswesens - 4 Y1 - 2024 SN - 978-3-8376-6728-8 U6 - https://doi.org/10.14361/9783839467282-003 SP - 13 EP - 28 PB - transcript CY - Bielefeld ER - TY - RPRT A1 - Wolter, Jennifer A1 - Raptis, Georgios T1 - Leitfaden zur Anbindung einer Reha-Einrichtung an die Telematikinfrastruktur BT - Digitales Rehabilitationskonsil mit Anbindung an die Telematik-Infrastruktur (Reha-/TI-Konsil) N2 - Der Leitfaden beschreibt wie Rehabilitationseinrichtungen an die Telematik-Infrastruktur angebunden werden sollen. Y1 - 2022 U6 - https://doi.org/10.13140/RG.2.2.32767.07842 CY - Regensburg ER - TY - JOUR A1 - Raptis, Georgios T1 - Windows 10 und Datenschutz in der Arztpraxis JF - Bayerisches Ärzteblatt KW - Windows 10 KW - Datenschutz KW - Arztpraxis Y1 - 2016 UR - https://www.bayerisches-aerzteblatt.de/fileadmin/aerzteblatt/ausgaben/2016/07/komplettpdf/Baebl7_8_2016_Komplettausgabe.pdf IS - 7/8 SP - 364 ER - TY - CHAP A1 - Raptis, Georgios T1 - Ein Verfahren zur Lösung des Problems der kryptographischen Langzeitsicherheit medizinischer Daten, die in einer Infrastruktur gespeichert werden T2 - BIOSIG-Konferenz 2007, Darmstadt N2 - Medizinische Daten, die - wie derzeit für die Telematik-Infrastruktur nach §291a SGB V spe-zifiziert - auch außerhalb der physischen Kontrolle der Eigentümer oder Ersteller (also z.B. außerhalb von Arztpraxen oder Klinken) auf Servern kryptographisch verschlüsselt gespeichert werden, müssen sehr lange vertraulich bleiben. Insbesondere darf der technische Betreiber des Servers, der die Daten speichert, keinen Zugriff erlangen. Es kann jedoch keine verlässliche Aussage dahingehend getroffen werden, ob die heute eingesetzten kryp-tographischen Algorithmen in 30 oder 40 Jahren die Vertraulichkeit der medizinischen Daten weiterhin gewährleisten. Es wird ein Verfahren vorgestellt, welches das Problem der langfristigen Sicherheit von verschlüsselt gespeicherten medizinischen Daten aus kryptographischer Sicht löst. Die Anwendung des Verfahrens wird am Beispiel einer nach den derzeit bekannten gematik-Spezifikationen definierten Infrastruktur veranschaulicht. Es wird von einer getrennten Speicherung von verschlüsselten medizinischen Daten und Schlüsselmaterial ausgegangen. Die Daten werden an der Datenquelle (Konnektor, z.B. eines Arztes) mit einem Einmalblock (One Time Pad, OTP) verschlüsselt. Sie sind damit beweisbar sicher verschlüsselt, weil das One-Time-Pad-Verschlüsselungsverfahren beweisbar „perfekt geheim“ ist. Der OTP-Schlüssel wird mit einem symmetrischen Schlüssel verschlüsselt, der wiederum mit den asymmetrischen Schlüsseln aller Zugriffsberechtigten verschlüsselt wird. Die kryptographische, technische und organisatorische Sicherheit des Verfahrens sowie seine Voraussetzungen und Kosten werden analysiert. KW - Gesundheitsinformationssystem KW - Datensicherhung KW - Kryptologie Y1 - 2007 UR - http://www.baek.de/downloads/Raptis_Verfahren-2.pdf ER - TY - CHAP A1 - Raptis, Georgios T1 - Die Konzepte und Mechanismen der elektronischen Gesundheitskarte und des Heilberufsausweises aus der Sicht der Datensicherheit / des Datenschutzes BT - Vortrag T2 - Forschungsseminar med. Informatik an der Universität Heidelberg, 22.06.2006 KW - Elektronische Gesundheitskarte KW - Heilberuf KW - Ausweis KW - Datenschutz KW - Datensicherheit Y1 - 2005 ER - TY - GEN A1 - Raptis, Georgios T1 - Ist die Sicherheit der medizinischen Daten in der Telematik-Infrastruktur zu gewährleisten? BT - Vortrag an der Universität Heidelberg, Kolloquium Wissenschaftlichkeit in der Medizin, 10.05.2007 T2 - Kolloquium Wissenschaftlichkeit in der Medizin, Universität Heidelberg, 10.05.2007 KW - Telemedizin KW - Datensicherheit Y1 - 2007 ER - TY - CHAP A1 - Raptis, Georgios ED - Wetter, Thomas T1 - Privacy and Data Protection: Mission Impossible? T2 - Consumer Health Informatics N2 - Medical confidentiality is very important because it builds the fundament of trust between doctors and patients. In modern health services data protection is essential. But there are also other important security objectives, such as integrity and authenticity of medical data and health services, as their breach can potentially lead to life threatening conditions. State of the art security mechanisms are necessary to protect medical data and services and prevent attacks known as “hacking”. They should include in particular cryptography, as you can usually rely on mathematics, more than in software security and access control mechanisms. As patients normally cannot assess the security of a service, security audits or certifications of health services should be provided to generate trust and confidence. KW - Gesundheitswesen KW - Medizinische Versorgung KW - Datenschutz KW - Datensicherung Y1 - 2016 SN - 978-3-319-19589-6 U6 - https://doi.org/10.1007/978-3-319-19590-2 SP - 273 EP - 280 PB - Springer International Publishing ER - TY - CHAP A1 - Raptis, Georgios ED - Marschner, Uwe ED - Clasbrummel, Bernhard ED - Dehm, Johannes T1 - Gewährleistung der IT-Sicherheit bei vernetzten Implantaten T2 - Biomedizinische Technik: Vernetzte und intelligente Implantate KW - Implantat KW - Vernetzung KW - Datenschutz KW - Datensicherung KW - Personenbezogene Daten Y1 - 2020 SN - 978-3-11-034927-6 SP - 182 EP - 192 PB - Walter de Gruyter ER - TY - JOUR A1 - Schenkel, Johannes A1 - Albert, Jürgen A1 - Raptis, Georgios A1 - Butz, Norbert T1 - Notfalldatensatz: Bessere Unterstützung für den Arzt JF - Deutsches Ärzteblatt KW - Elektronische Gesundheitskarte KW - Notfallmedizin Y1 - 2011 UR - https://www.aerzteblatt.de/pdf.asp?id=89546 VL - 108 IS - 19 SP - A-1046, B-864, C-864 ER - TY - JOUR A1 - Schenkel, Johannes A1 - Albert, Jürgen A1 - Raptis, Georgios A1 - Butz, Norbert ED - Duesberg, Felix T1 - Notfalldatenmanagement auf der elektronischen Gesundheitskarte JF - e-Health KW - Elektronische Gesundheitskarte KW - Notfallmedizin Y1 - 2012 SP - 64 EP - 67 PB - medical future verlag CY - Solingen ER - TY - CHAP A1 - Raptis, Georgios T1 - Notfalldaten und Datenerhalt mit der elektronischen Gesundheitskarte. T2 - Tagungsband 22. Smartcard-Workshop 2012 KW - Elektronische Gesundheitskarte KW - Notfallmedizin KW - Datensicherung Y1 - 2012 SP - 166 PB - Fraunhofer-Verlag ER - TY - GEN A1 - Raptis, Georgios T1 - Biometrie - Anwendungen und Datenschutz. Welche Zusatzinformationen liefert der IRIS-Pförtner? Nebennutzen in einem biometrischen Zugangskontrollsystem. Medizinische Hintergründe. Symposium des Bundesamtes für Sicherheit in der Informationstechnik, Vortrag, Darmstadt 23. Mai 2002 BT - Vortrag, Darmstadt 23. Mai 2002 T2 - Symposium des Bundesamtes für Sicherheit in der Informationstechnik Y1 - 2002 ER - TY - RPRT A1 - Schenkel, Johannes A1 - Albert, Jürgen A1 - Raptis, Georgios T1 - Arbeitskonzept Notfalldatenmanagement KW - Elektronische Gesundheitskarte KW - Notfallmedizin Y1 - 2011 UR - www.bundesaerztekammer.de/downloads/Arbeitskonzept_NFDM_1.051.pdf ER - TY - THES A1 - Raptis, Georgios T1 - Vertraulichkeit von medizinischen Daten in der Telematik-Infrastruktur - Sicherheitsanalyse unter Berücksichtigung von Aspekten der langfristigen Sicherheit KW - Medizinische Dokumentation KW - Telekommunikation KW - Datensicherheit Y1 - 2008 CY - Heidelberg ER - TY - GEN A1 - Raptis, Georgios T1 - Mechanismen und Einsatzkonzepte von Heilberufsausweis und elektronischer Gesundheitskarte BT - Vortrag T2 - Oberseminar im Fachbereich Informatik, Kryptographie und Computeralgebra der TU-Darmstadt, 28.11.2006 KW - Elektronische Gesundheitskarte KW - Heilberuf KW - Ausweis Y1 - 2006 ER - TY - GEN A1 - Raptis, Georgios T1 - Einsatzmöglichkeiten des elektronischen Heilberufsausweises BT - Vortrag im Rahmen des CAST-Forums, Fraunhofer IGD, 14.09.2006 T2 - CAST-Forums, Fraunhofer IGD, 14.09.2006 KW - Heilberuf KW - Ausweis Y1 - 2006 ER - TY - JOUR A1 - Woltmann, Lucas A1 - Volk, Peter A1 - Dinzinger, Michael A1 - Gräf, Lukas A1 - Strasser, Sebastian A1 - Schildgen, Johannes A1 - Hartmann, Claudio A1 - Lehner, Wolfgang T1 - Data Science Meets High-Tech Manufacturing – The BTW 2021 Data Science Challenge JF - Datenbank-Spektrum N2 - For its third installment, the Data Science Challenge of the 19th symposium “Database Systems for Business, Technology and Web” (BTW) of the Gesellschaft für Informatik (GI) tackled the problem of predictive energy management in large production facilities. For the first time, this year’s challenge was organized as a cooperation between Technische Universität Dresden, GlobalFoundries, and ScaDS.AI Dresden/Leipzig. The Challenge’s participants were given real-world production and energy data from the semiconductor manufacturer GlobalFoundries and had to solve the problem of predicting the energy consumption for production equipment. The usage of real-world data gave the participants a hands-on experience of challenges in Big Data integration and analysis. After a leaderboard-based preselection round, the accepted participants presented their approach to an expert jury and audience in a hybrid format. In this article, we give an overview of the main points of the Data Science Challenge, like organization and problem description. Additionally, the winning team presents its solution. KW - Data Science Y1 - 2021 U6 - https://doi.org/10.1007/s13222-021-00398-4 VL - 45 SP - 5 EP - 10 PB - Springer Nature ER - TY - JOUR A1 - Schreier, Franz A1 - Kohlert, Dieter T1 - Optimized implementations of rational approximations-a case study on the Voigt and complex error function JF - Computer Physics Communications : an international journal for computational physics and physical chemistry N2 - Rational functions are frequently used as efficient yet accurate numerical approximations for real and complex valued special functions. For the complex error function , whose real part is the Voigt function , the rational approximation developed by Hui, Armstrong, and Wray [Rapid computation of the Voigt and complex error functions, J. Quant. Spectrosc. Radiat. Transfer 19 (1978) 509–516] is investigated. Various optimizations for the algorithm are discussed. In many applications, where these functions have to be calculated for a large x grid with constant y, an implementation using real arithmetic and factorization of invariant terms is especially efficient. Y1 - 2008 U6 - https://doi.org/10.1016/j.cpc.2008.04.012 SN - 0010-4655 VL - 179 IS - 7 SP - 457 EP - 465 PB - Elsevier CY - Amsterdam ER - TY - GEN A1 - Hauser, Florian A1 - Reuter, Rebecca A1 - Gegenfurtner, Andreas A1 - Gruber, Hans A1 - Mottok, Jürgen A1 - Hutzler, Ivonne T1 - Heuristics in Software Modelling: An Eyetracking Study T2 - Earli Book of Abstracts N2 - To investigate the role of heuristics in the domain of software engineering, an eye tracking study was conducted in which experts and novices were compared. The study focused on one of the most challenging parts in this domain: the generation of an object model for a software product based on a requirements specification. During their training, software engineers are taught different techniques to solve this task. One of these techniques is the noun/verb analysis. However, it is still unclear to what extent novice and expert programmers are making use of it. Ideally, the noun/verb analysis works as a heuristic and helps programmers to make fast and accurate decisions. Participants in the study were 40 software programmers at four levels of expertise (novices, intermediates, experienced rogrammers, experts). They were presented with ten decision tasks. In each task, participants read a requirement specification and then had to choose one out of three presented class diagrams that they considered the best solution. During the task, their eye movements were recorded. Results show that all participants used the noun/verb analysis as a heuristic. Programmers with higher levels of expertise, however, outperformed programmers with lower levels of expertise. Interestingly, the more experienced programmers were not following the noun/verb analysis in a blindfolded way. They realised that the noun/verb analysis would produce diagrams, but a skilled software architect would not model them in this way. Instead they created their models in a way that they perceived as more logical and realistic Y1 - 2019 UR - https://earli.org/sites/default/files/2019-09/BOA-2019.pdf PB - RWTH Aachen ER - TY - CHAP A1 - Soska, Alexander A1 - Schumm, Michael A1 - Joseph, Saskia A1 - Reschke, Michael A1 - Mottok, Jürgen A1 - Niemetz, Michael A1 - Schroll-Decker, Irmgard T1 - Comparison of Frontal Lecture and Workshop Learning Arrangements in a Software Engineering Education Project T2 - 2014 IEEE Global Engineering Education Conference (EDUCON), Istanbul, Turkey N2 - The increase in complexity of software and its creation over the last decades requires an increase in the quality of the education of software engineering professionals. The number of Universities which answer this call by replacing or extending lectures with simulated software projects is constantly rising. However, the question how to best transfer new technological knowledge needed to be successful within this projects to the students remains open. Therefore this paper will present a comparison between the classical frontal lecture and a modern workshop learning arrangement used within these projects. By the use of workshops not only the knowledge transfer but also the acquisition of personal and social competences will be facilitated. Furthermore positive experiences with workshops at university level will support life-long learning. Y1 - 2014 U6 - https://doi.org/10.1109/EDUCON.2014.6826162 SP - 653 EP - 658 ER - TY - CHAP A1 - Haug, Sonja A1 - Schmidbauer, Simon ED - Spieker, Michael ED - Hofmann, Christian T1 - Integrationskonzepte und Messung von Integration auf kommunaler Ebene T2 - Integration - Teilhabe und Zusammenleben in der Migrationsgesellschaft KW - Soziale Integration KW - Migration KW - Einwanderer KW - Flüchtling Y1 - 2020 UR - https://www.nomos-elibrary.de/10.5771/9783748910558-67/integrationskonzepte-und-messung-von-integration-auf-kommunaler-ebene?page=1 SN - 9783748910558 SP - 69 EP - 84 PB - Nomos CY - Baden-Baden ER - TY - JOUR A1 - Thor, Andreas A1 - Scherzinger, Stefanie A1 - Specht, Günther T1 - Editorial JF - Datenbank-Spektrum Y1 - 2014 U6 - https://doi.org/10.1007/s13222-014-0162-1 VL - 14 IS - 2 SP - 81 EP - 84 PB - Springer ER - TY - CHAP A1 - Ramsauer, Ralf A1 - Lohmann, Daniel A1 - Mauerer, Wolfgang T1 - The List is the Process: Reliable Pre-Integration Tracking of Commits on Mailing Lists T2 - 2019 IEEE/ACM 41st International Conference on Software Engineering (ICSE), 25-31 May 2019, Montreal, QC, Canada N2 - A considerable corpus of research on software evolution focuses on mining changes in software repositories, but omits their pre-integration history. We present a novel method for tracking this otherwise invisible evolution of software changes on mailing lists by connecting all early revisions of changes to their final version in repositories. Since artefact modifications on mailing lists are communicated by updates to fragments (i.e., patches) only, identifying semantically similar changes is a non-trivial task that our approach solves in a language-independent way. We evaluate our method on high-profile open source software (OSS) projects like the Linux kernel, and validate its high accuracy using an elaborately created ground truth. Our approach can be used to quantify properties of OSS development processes, which is an essential requirement for using OSS in reliable or safety-critical industrial products, where certifiability and conformance to processes are crucial. The high accuracy of our technique allows, to the best of our knowledge, for the first time to quantitatively determine if an open development process effectively aligns with given formal process requirements. KW - commits KW - Data mining KW - Electronic mail KW - Linux KW - mailing lists KW - mining software repositories KW - Open source software KW - patches KW - Software engineering KW - Software maintenance KW - Software reliability Y1 - 2019 U6 - https://doi.org/10.1109/ICSE.2019.00088 SP - 807 EP - 818 PB - IEEE ER - TY - CHAP A1 - Deubzer, Michael A1 - Hobelsberger, Martin A1 - Mottok, Jürgen A1 - Schiller, Frank A1 - Dumke, Reiner A1 - Siegle, Markus A1 - Margull, Ulrich A1 - Niemetz, Michael A1 - Wirrer, Gerhard T1 - Modeling and Simulation of Embedded Real-Time Multi-Core Systems T2 - Proceedings of the 3rd Embedded Software Engineering Congress, 7. bis 9. Dezember 2010, Sindelfingen KW - Real-Time Systems KW - Multicore KW - Model-Driven Development KW - Architecture Description Language KW - Simulation Y1 - 2010 UR - https://www.unibw.de/technische-informatik/mitarbeiter/professoren/siegle/publikationen/ese2010_muco_modsim.pdf ER - TY - CHAP A1 - Hobelsberger, Martin A1 - Dumke, Reiner A1 - Mottok, Jürgen A1 - Niemetz, Michael A1 - Wirrer, Gerhard T1 - An Experience-Based Repository of Reusable Components for an Component-Based Automotive Software System T2 - Applied Software Measurement, proceedings of the joined International Conferences on Software Measurement IWSM/MetriKon/Mensura 2010, 10.-12. November 2010, Stuttgart, Germany Y1 - 2010 SP - 218 EP - 240 ER - TY - CHAP A1 - Mottok, Jürgen A1 - Krämer, Stefan A1 - Deubzer, Michael A1 - Hobelsberger, Martin A1 - Martin, Felix T1 - Hardware Based Tracing of Embedded Multi-Core Systems T2 - 4th Applied Research Conference, 5th July 2014, Ingolstadt Y1 - 2014 SN - 978-3-8440-2875-1 ER - TY - CHAP A1 - Hobelsberger, Martin A1 - Mottok, Jürgen T1 - Software Qualität – eine Glaubensfrage? Ein Überblick über Modelle der Softwarezuverlässigkeit T2 - Proceedings of the 2nd Embedded Software Engineering Congress, 8. bis 10. Dezember 2009, Sindelfingen Y1 - 2009 SP - 134 EP - 148 ER - TY - JOUR A1 - Deubzer, Michael A1 - Mottok, Jürgen A1 - Hobelsberger, Martin T1 - Profiling in Embedded Real-Time Software Systemen JF - Jahresrückblick 2008 des Bayerischen IT-Sicherheitsclusters Y1 - 2008 ER - TY - JOUR A1 - Könning, Michael A1 - Westner, Markus A1 - Strahringer, Susanne T1 - A Systematic Review of Recent Developments in IT Outsourcing Research JF - Information Systems Management N2 - Incomplete conceptualization of the information technology outsourcing (ITO) literature represents a challenge for navigating extant research and engaging into purposeful academic discourse. We extend the analysis of empirical findings on determinants of ITO decisions, outcomes, and governance. We identify increasing levels of research maturity, analyze effects of 38 new independent variables, highlight contradictory findings, and observe increasing interest in emerging topics such as innovation through ITO and multisourcing. KW - Outsourcing KW - Informationstechnik KW - Literaturbericht KW - Information Technology KW - Outsourcing KW - Literature Review KW - Sourcing outcomes KW - Sourcing decisions Y1 - 2019 UR - https://doi.org/10.1080/10580530.2018.1553650 VL - 36 IS - 1 SP - 78 EP - 96 PB - Taylor & Francis ER - TY - CHAP A1 - Krämer, Stefan A1 - Simsek, Erol A1 - Braun, Jürgen A1 - Deubzer, Michael A1 - Stingl, Armin A1 - Hobelsberger, Martin A1 - Mottok, Jürgen T1 - Mut zu Fehlern, um die Qualität zu steigern – Fault-Injection zur Steigerung der Zuverlässigkeit T2 - Tagungsband, 6th Embedded Software Engineering, Kongress 2013, 2. bis 6. Dezember 2013, Sindelfingen Y1 - 2013 SN - 978-3-8343-2408-5 SP - 577 EP - 585 ER - TY - CHAP A1 - Sailer, Andreas A1 - Schmidhuber, Stefan A1 - Deubzer, Michael A1 - Hobelsberger, Martin A1 - Mottok, Jürgen T1 - Requirements engineering for a continuous design flow and methodology T2 - 2nd Applied Research Conference 2012 (ARC 2012) 25./26. June 2012, Nuremberg Y1 - 2012 SN - 978-3-8440-1093-0 SP - 76 EP - 79 PB - Shaker CY - Aachen ER - TY - CHAP A1 - Schmidhuber, Stefan A1 - Sailer, Andreas A1 - Deubzer, Michael A1 - Hobelsberger, Martin A1 - Mottok, Jürgen T1 - Overview of the itea2-project amalthea T2 - 2nd Applied Research Conference 2012 (ARC 2012) 25./26. June 2012, Nuremberg Y1 - 2012 SN - 978-3-8440-1093-0 SP - 60 EP - 62 PB - Shaker CY - Aachen ER - TY - JOUR A1 - Kobus, Jörn A1 - Westner, Markus A1 - Strahringer, Susanne T1 - Enabling digitization by implementing Lean IT BT - Lessons learned JF - The TQM Journal N2 - Purpose With the rise of digitization, IT organizations are challenged to provide efficient service delivery and offer innovative digital solutions while maintaining a constant resource capacity. To address this challenge, some IT organizations have adopted Lean Management (LM). Although LM is a standard production mode in manufacturing, it is less familiar to IT organizations. The purpose of this paper is to identify 12 lessons learned from companies who implemented LM in their IT organization (Lean IT) to free up their IT resource capacity from existing day-to-day operations so they could use it to enable their digitization strategy. Design/methodology/approach A case study of two major international companies from different industries. Data were collected from 25 structured interviews. Findings The lessons learned provide insights into how these companies implemented Lean IT, the potential outcomes they aimed for, what they did to achieve those outcomes, how they facilitated the implementation of Lean IT, and restrictions they encountered during the implementation. Research limitations/implications The findings are based on a limited range of IT organizations. Practical implications The lessons learned inform those implementing Lean IT because they explain how companies have implemented Lean IT to facilitate digitization and the benefits and pitfalls they encountered. A comparison of Lean IT and Lean Production shows that LM is transferable to IT organizations if domain specific requirements are respected. Originality/value This paper reports the unique experience of companies implementing Lean IT, which can inform other companies in a similar situation. KW - Digitization KW - IT management KW - IT organization KW - Lean management KW - Unternehmen KW - Informationstechnik KW - Lean Management KW - Digitalisierung Y1 - 2018 UR - https://doi.org/10.1108/TQM-02-2018-0026 VL - 30 IS - 6 SP - 764 EP - 778 PB - Emerald insight ER - TY - JOUR A1 - Kopper, Andreas A1 - Westner, Markus A1 - Strahringer, Susanne T1 - Kontrollierte Nutzung von Schatten-IT JF - HMD Praxis der Wirtschaftsinformatik N2 - Basierend auf einer systematischen und umfangreichen Analyse von Praxisbeiträgen zum Thema Schatten-IT, die zwischen September 2015 und August 2016 erschienen sind, beschreibt der vorliegende Artikel Governance-Aspekte zu diesem Phänomen. Er ergänzt damit vorhergehende akademische Studien. Es zeigt sich, dass unter Praktikern der Eindruck vorherrscht, dass IT-Abteilungen unter zunehmendem Druck stehen, schneller auf sich ändernde Anforderungen aus den Fachbereichen reagieren zu müssen. Können IT-Abteilungen diesen Erwartungen nicht entsprechen, beschaffen sich Fachbereiche und Nutzer selbst Lösungen in Form von Schatten-IT. Als mögliche Antwort darauf kann sich die IT-Abteilung agiler organisieren und die IT-Architektur im Unternehmen modernisieren. Eine weitere Möglichkeit besteht darin, sich das innovative Potenzial von Schatten-IT zunutze zu machen und deren Umsetzung aktiv durch organisatorische und technische Maßnahmen zu unterstützen. IT-Sicherheitsmanagement und technische Schutzmechanismen können helfen, die so entstandenen Lösungen abzusichern und die Risiken zu minimieren. Nach vorherrschender Ansicht entwickelt sich die IT-Abteilung als Konsequenz aus all diesen Maßnahmen zu einem nutzerorientierten, internen Service-Provider und strategischen Partner für die Fachbereiche. T2 - Controlled Use of Shadow IT KW - Schatten-IT KW - IT-Governance KW - Agilität KW - IT-Sicherheit KW - IT-Abteilung KW - Corporate Governance KW - Agilität KW - Datensicherung Y1 - 2017 U6 - https://doi.org/10.1365/s40702-016-0286-x VL - 54 SP - 97 EP - 110 PB - Springer ER - TY - JOUR A1 - Kobus, Jörn A1 - Westner, Markus A1 - Strahringer, Susanne T1 - Einführung von Lean Management in IT-Organisationen JF - HMD Praxis der Wirtschaftsinformatik N2 - In der Produktion gilt „Lean Management“ als einer der de-facto Standardmanagementansätze. Lean Management in IT-Organisationen (Lean IT) ist dahingegen in der Praxis weniger verbreitet und in der Wissenschaft kaum erforscht. Dieser Beitrag aggregiert und erweitert die Ergebnisse mehrerer Forschungsarbeiten. Dabei werden vorrangig zwei Aspekte diskutiert: (1) Ein mögliches Einführungsmodell für Lean IT. Dieses verknüpft fünf Rollen (Sponsor, Programmleiter, Navigator, Linienführungskraft und Linienexperte) mit vier Phasen (Vorbereitung, Analyse, Gestaltung und Implementierung). (2) Besondere Herausforderungen für Linienführungskräfte, die aufgrund der „bottom up“-Ausrichtung bei Lean-IT-Einführungen stark gefordert werden. Neben einer klaren Vision für die Organisationseinheit und dem Verständnis, an welcher Stelle Lean IT die Organisationseinheit konkret unterstützen kann, benötigen sie Offenheit, Veränderungswillen und die Bereitschaft Verantwortung an Mitarbeiter zu delegieren. Außerdem sollten sie über ein ausreichendes Zeitbudget für die Einführung verfügen, um ihrer gestaltenden und qualitätssichernden Funktion nachkommen zu können. KW - Betriebliches Informationssystem KW - Lean Management KW - Lean IT KW - IT-Industrialisierung KW - Lean Management KW - IT-Effizienzprogramme KW - Einführungsmodell Y1 - 2016 UR - https://link.springer.com/article/10.1365/s40702-016-0266-1 VL - 53 IS - 6 SP - 879 EP - 893 ER - TY - JOUR A1 - Strasser, Artur A1 - Westner, Markus T1 - Information systems offshoring BT - Results of a systematic literature review JF - Journal of Information Technology Management N2 - An increasing amount of IS offshoring research has been published during the last four years. This paper presents a comprehensive view of the field of study from a managerial point of view. It provides a consolidated view of the field of study between 2010 and 2013 based on a manual search comprising 69 selected journals and 9 conferences, as well as a search using 6 journal databases. The literature review ensures continuity of research by connecting to a comprehensive literature analysis covering the years 1999 to 2009. This way it consolidates and critically reflects the state of the research of the last 14 years. Overall, we compiled 95 relevant publications originating from leading IS journals and IS conference proceedings. The results indicate that IS offshoring research is largely non-theory based, using almost entirely empirical data and interpretive research methods and -to a smaller extent -positivist research designs. The ISO research of the last 14 years focuses on the implementation stages "how" and "outcome" while the pre-implementation-stages “why”, “what”, and “which” are comparatively sparsely researched. Future studies should apply a more theory-driven approach with a greater attention on pre-implementation aspects of information systems offshoring. In addition, future research should investigate the special nature of near- and onshoring, captive offshoring as well asagile (project) management techniques suitable for ISO. KW - Betriebliches Informationssystem KW - Offshoring KW - Literaturbericht KW - Offshoring KW - Nearshoring KW - Information systems KW - Information technology KW - Literature review Y1 - 2015 UR - http://jitm.ubalt.edu/XXVI-2/article5.pdf VL - 26 IS - 2 SP - 70 EP - 142 ER - TY - JOUR A1 - Bary, Benedikt von A1 - Westner, Markus T1 - Information Systems Backsourcing BT - A Literature Review JF - Journal of Information Technology Management N2 - Information systems backsourcing describes the transferof previously outsourced activities, assets, or personnel back to the originating companyto regain ownership and control. While there is much research on information systems outsourcing, the topic of backsourcing information systemsis still an emerging research area. Therefore, ourpaper aims to explore and synthesizethe existing literature on information systemsbacksourcing, since there is no exhaustiveliteraturereview of the state of the research to our knowledge available yet. In this paper, wecreate a framework to structure the existing research along the overallbacksourcing process. We identifydifferent motivators, such asexpectation gaps, orinternal and external organizational changes, leading towards a backsourcing decision, and factors positively or negatively influencing this decision. Additionally, we derive implementation success factors based on the existing literature to guide companies through the backsourcing process.We also differentiate the term backsourcing from related, sometimes synonymously used terms, by emphasizing the change of ownership back to the company of originas the main criterion.Additionally, we discuss opportunities for future research in the field of information systems backsourcing. KW - Betriebliches Informationssystem KW - Insourcing KW - Literaturbericht KW - Backsourcing KW - Backshoring KW - Reshoring KW - Inshoring KW - Information systems KW - Information technology KW - Literature review Y1 - 2018 UR - http://jitm.ubalt.edu/XXIX-1/article4.pdf VL - 29 IS - 1 SP - 62 EP - 78 PB - University of Tehran ER - TY - JOUR A1 - Kobus, Jörn A1 - Westner, Markus A1 - Strahringer, Susanne T1 - Change management lessons learned for Lean IT implementations JF - International Journal of Information Systems and Project Management N2 - Lean Management is a standard production mode that has been familiar to production organizations for several decades. To date, however, academic literature has presented surprisingly little information about the application of Lean Management in Information Technology (IT) organizations, or what is called Lean IT. Drawing upon an empirical qualitative case study of the IT departments of two multinational companies, in this paper we identify change management lessons learned for Lean IT implementations, as well as seven characteristics of a corresponding change management approach. As an extension of our work, researchers should validate and expand our initial findings, preferably in a quantitative setting. KW - Betriebliches Informationssystem KW - Lean Management KW - Fallstudiensammlung KW - Lean Management KW - Lean IT KW - Implementation KW - Case study KW - Lessons learned Y1 - 2017 UR - https://doi.org/10.12821/ijispm050103 VL - 5 IS - 1 SP - 47 EP - 60 ER - TY - CHAP A1 - Könning, Michael A1 - Heinrich, Kai A1 - Leyh, Christian A1 - Westner, Markus T1 - A quantitative analysis of culture-induced differences in pivotal IT outsourcing contract features T2 - Proceedings of the 27th European Conference on Information Systems (ECIS 2019): Stockholm & Uppsala, Sweden, June 8-14 N2 - More than 30 years after its first implementation, IT outsourcing (ITO) is unanimously considered a critical component of corporate strategy for private and public institutions alike. While implementations of ITO around the world share some common characteristics like typical reasons for outsourcing, key success factors, or dimensions along which they can be classified, extant research also points to regional differences. However, research on this topic, specifically regarding pivotal contract features like contract value, contract length, or pricing methods, is still in its infancy, and quantitative analyses on the subject are particularly scarce. We address this research gap by analyzing data on 14,917 ITO contracts closed between 2007 and 2017 through the lens of cultural regions and three statistical methods. The contribution of our paper is threefold. First, our descriptive analysis points to globally decreasing contract lengths and contract values, confirming previous studies and practice reports. Second, an ANOVA with independent post-hoc testing provides quantitative supportfor the degree of dissimilarity among individual regions in pivotal ITO contract features. Finally, our quantitative replication of a previous study identifies culture-induced regional differences between USA and Japan regarding the effect of influence factors on ITO contract features. KW - IT Sourcing KW - IT Outsourcing KW - Sourcing Strategy KW - Contract Design KW - Cultural Regions KW - Betriebliches Informationssytem KW - Outsourcing KW - Vertrag KW - Kultur Y1 - 2019 UR - https://aisel.aisnet.org/cgi/viewcontent.cgi?article=1115&context=ecis2019_rp SP - 1 EP - 15 ER - TY - JOUR A1 - Westner, Markus A1 - Strahringer, Susanne T1 - Determinants of success in IS offshoring projects BT - Results from an empirical study of German companies JF - Information & Management N2 - High labor cost in western countries allows cost savings by companies engaging in IS offshoring. However, studies worldwide indicate that a large number of companies that engaged in IS offshoring are not satisfied with the outcome. Our study examined the determinants of IS offshore project success: We developed a model and empirically tested it with data collected from 304 experts who reported on projects offshored from Germany to a wide range of near and distant countries. The model posited a direct effect of offshoring expertise and trust in offshore service provider (OSP) on success, as well as an indirect effect mediated by project suitability, knowledge transfer, and liaison quality. An analysis using partial least squares (PLSs) provided significant support for almost all these relationships. However, it showed that offshoring expertise played a minor role in explaining success and the mediating constructs. Trust in OSP had a small direct effect on success and a medium to large effect on the mediating constructs. Project suitability, knowledge transfer, and liaison quality all had small direct effects on success. KW - Betriebliches Informationssystem KW - Offshoring KW - Wissensmanagement KW - Qualitätsmanagement KW - Information systems offshoring KW - Offshore project success KW - Project suitability KW - Knowledge transfer KW - Liaison quality KW - Offshoring expertise KW - Trust in offshore service provider KW - Partial least squares Y1 - 2010 UR - https://doi.org/10.1016/j.im.2010.06.003 VL - 47 IS - 5-6 SP - 291 EP - 299 ER - TY - JOUR A1 - Westner, Markus A1 - Strahringer, Susanne T1 - The current state of IS offshoring in Germany BT - Project characteristics and success patterns JF - Journal of Information Technology Management N2 - This paper empirically examines the current state of the IS offshoring phenomenon in Germany regarding project characteristics and success patterns. Relying on a sample of 304 projects conducted at various industry sectors and companies, results show that IS offshoring primarily occurs in sectors Telecommunications and IT at large corporations. Cost reduction is the main reason for going offshore and offshore projects are executed as part of a larger program at companies. Noticeably, most projects are delivered from India. Additionally, neither captive offshoring nor offshore outsourcing dominates as a de-livery option. Comparing different project subgroups regarding project success, the results reveal that projects delivered by an internal or partially owned service provider are more successful. Other project characteristics such as a project’s embedded-ness in a larger offshoring program, a project’s size, or a project’s offshoring degree in terms of relatively offshored labor hours show few significant differences. The paper addresses the paucity of empirical research on the current state of the IS offshoring phenomenon in Germany. KW - Offshoring KW - Nearshoring KW - Information systems sourcing KW - Outcome KW - Project success KW - Success factor KW - Betriebliches Informationssystem KW - Offfshoring Y1 - 2010 UR - http://jitm.ubalt.edu/XXI-1/article4.pdf VL - 21 IS - 1 SP - 49 EP - 70 ER - TY - JOUR A1 - Westner, Markus A1 - Strahringer, Susanne T1 - Evaluation criteria for selecting offshoring candidates BT - An analysis of practices in German businesses JF - Journal of Information Technology Management N2 - The identification of suitable applications or projects is a main initial step in any software development or maintenance related IS offshoring arrangement. This paper examines evaluation criteria and their importance for selecting application or project candidates for offshoring. Based on a literature analysis and interviews with 47 experts from 36 different German companies describing 64 case examples, we find that in contrast to the literature, “size”, “codification”, and “language” are perceived as important selection criteria by experts. Case examples additionally show that “business specificity” seems to be a main reason for application or project failures, that “business criticality” appears to be less important than suggested by the literature, and that adequate “size” might be a necessary prerequisite, but seems not to be a sufficient criterion for an application’s or project’s suitability for offshoring. These differences in comparison to findings from the literature may be explained by cultural and language differences. KW - Offshoring KW - Nearshoring KW - Outsourcing KW - What to offshore KW - Selection criteria KW - Information systems KW - Betriebliches Informationssystem KW - Offshoring KW - Projekt KW - Evaluation Y1 - 2008 UR - http://jitm.ubalt.edu/XIX-4/article2.pdf VL - 19 IS - 4 SP - 16 EP - 34 ER - TY - CHAP A1 - Wulf, Frederik A1 - Strahringer, Susanne A1 - Westner, Markus T1 - Information security risks, benefits, and mitigation measures in cloud sourcing T2 - Proceedings of the IEEE 21th Conference on Business Informatics (CBI): 2019, Moscow, Russia N2 - This paper develops a categorization of cloud security risks, elaborates how they impact information security, and discusses potential security benefits from cloud sourcing. This review integrates the literature on information systems and computer science to summarize managerial and technological mitigation measures that enhance cloud security. The analysis uncovers gaps regarding the empirical investigation of security considerations in the corporate decision-making process. Specifically, the micro level of how security comes into play in the decision-making process and whether mitigation measures proposed by scholars are practically feasible requires further investigation. Furthermore, the macro level, how stakeholders perceive cloud sourcing, is not yet well understood. KW - Cloud Computing KW - Security KW - Risks KW - Mitigation KW - Cloud Computing KW - Datensicherheit Y1 - 2019 UR - 10.1109/CBI.2019.00036 SP - 258 EP - 267 ER - TY - CHAP A1 - Bary, Benedikt von A1 - Westner, Markus A1 - Strahringer, Susanne T1 - Do researchers investigate what practitioners deem relevant? BT - Gaps between research and practice in the field of information systems backsourcing T2 - Proceedings of the 20th IEEE International Conference on Business Informatics (IEEE CBI 2018): Vienna, Austria, 11-14 July N2 - There is a common understanding amongst academics that information systems (IS) research sometimes has limited relevance for practitioners. This can be explained by the fact that research lags behind the fast moving IS environment, has limited practical applicability and is hard to access. We have focused on the research area of IS backsourcing, and analyzed practitioner literature to increase our understanding of topics of interest for practitioners, to determine a potential gap between academic and practitioner literature, and to identify future research directions in this field. We observed that most publications are either news or background articles, focusing on describing backsourcing cases. Additionally, we identified four recurring themes, namely reasons for backsourcing, presentation of survey results, discussion of industry trends, and backsourcing success stories. The main reasons identified to trigger backsourcing decisions are cost savings, quality improvements, and increasing control and flexibility. By comparing our findings with academic literature on IS backsourcing, we conclude that generally both literature types cover similar topics. However, researchers have a more formulative or interpretive focus than the often descriptive practitioner literature. Academic literature also examines a broader range of topics, while practitioner literature has a narrower focus. Additionally, we observe one difference regarding applied terminology: while researchers employ the term backsourcing, practitioners mostly use back in-house or insourcing. Our paper contributes to facilitating the exchange between academics and practitioners, presents topics to consider when aiming to increase practical relevance and provides researchers with concrete directions for future research within the field of IS backsourcing. KW - Betriebliches Informationssystem KW - Backsourcing KW - Anwendung KW - Literaturbericht KW - Information systems KW - Backsourcing KW - Practical applicability Y1 - 2018 U6 - https://doi.org/10.1109/CBI.2018.00014 SP - 40 EP - 49 ER -