TY - JOUR AB - Abstract Um global erfolgreich zu bleiben, wird es bald nicht mehr ausreichen, Kriterien wie ein gutes Produktdesign zu erfüllen. Stattdessen muss der Kundennutzen kontinuierlich über den Produktlebenszyklus hinaus gesteigert werden. Tech-Konzerne verzeichnen bereits Erfolge und verkörpern den Wandel schon heute. Vor diesem Hintergrund ist ein neues Leitbild in der Entwicklung und dem Betrieb von zukünftigen, technischen Systemen erforderlich. EngOps soll diesen Bedarf decken und steht für die agile Kollaboration zwischen Engineering und Operations. Alle Teile des Unternehmens sollen ständig miteinander kooperieren, um so beispielsweise wandelbare Produkte auch nach dem Verkauf entwickeln zu können. AU - Anacker, Harald AU - Dumitrescu, Roman AU - Michels, Nico AU - Rasor, Rik ID - 33710 IS - 6 JF - Zeitschrift für wirtschaftlichen Fabrikbetrieb KW - Management Science and Operations Research KW - Strategy and Management KW - General Engineering SN - 2511-0896 TI - EngOps – Ein Leitbild für das agile Zusammenwirken von Engineering und Operations VL - 117 ER - TY - JOUR AU - Kim, Sanghoon AU - Pathak, Sachin AU - Rhim, Sonny H. AU - Cha, Jongin AU - Jekal, Soyoung AU - Hong, Soon Cheol AU - Lee, Hyun Hwi AU - Park, Sung‐Hun AU - Lee, Han‐Koo AU - Park, Jae‐Hoon AU - Lee, Soogil AU - Steinrück, Hans-Georg AU - Mehta, Apurva AU - Wang, Shan X. AU - Hong, Jongill ID - 33833 IS - 24 JF - Advanced Science KW - General Physics and Astronomy KW - General Engineering KW - Biochemistry KW - Genetics and Molecular Biology (miscellaneous) KW - General Materials Science KW - General Chemical Engineering KW - Medicine (miscellaneous) SN - 2198-3844 TI - Giant Orbital Anisotropy with Strong Spin–Orbit Coupling Established at the Pseudomorphic Interface of the Co/Pd Superlattice VL - 9 ER - TY - JOUR AB - Nowadays, an increasing number of applications uses deserialization. This technique, based on rebuilding the instance of objects from serialized byte streams, can be dangerous since it can open the application to attacks such as remote code execution (RCE) if the data to deserialize is originating from an untrusted source. Deserialization vulnerabilities are so critical that they are in OWASP’s list of top 10 security risks for web applications. This is mainly caused by faults in the development process of applications and by flaws in their dependencies, i.e., flaws in the libraries used by these applications. No previous work has studied deserialization attacks in-depth: How are they performed? How are weaknesses introduced and patched? And for how long are vulnerabilities present in the codebase? To yield a deeper understanding of this important kind of vulnerability, we perform two main analyses: one on attack gadgets, i.e., exploitable pieces of code, present in Java libraries, and one on vulnerabilities present in Java applications. For the first analysis, we conduct an exploratory large-scale study by running 256 515 experiments in which we vary the versions of libraries for each of the 19 publicly available exploits. Such attacks rely on a combination of gadgets present in one or multiple Java libraries. A gadget is a method which is using objects or fields that can be attacker-controlled. Our goal is to precisely identify library versions containing gadgets and to understand how gadgets have been introduced and how they have been patched. We observe that the modification of one innocent-looking detail in a class – such as making it public – can already introduce a gadget. Furthermore, we noticed that among the studied libraries, 37.5% are not patched, leaving gadgets available for future attacks. For the second analysis, we manually analyze 104 deserialization vulnerabilities CVEs to understand how vulnerabilities are introduced and patched in real-life Java applications. Results indicate that the vulnerabilities are not always completely patched or that a workaround solution is proposed. With a workaround solution, applications are still vulnerable since the code itself is unchanged. AU - Sayar, Imen AU - Bartel, Alexandre AU - Bodden, Eric AU - Le Traon, Yves ID - 33835 JF - ACM Transactions on Software Engineering and Methodology KW - Software SN - 1049-331X TI - An In-depth Study of Java Deserialization Remote-Code Execution Exploits and Vulnerabilities ER - TY - JOUR AU - Piskachev, Goran AU - Späth, Johannes AU - Budde, Ingo AU - Bodden, Eric ID - 33836 IS - 5 JF - Empirical Software Engineering TI - Fluently specifying taint-flow queries with fluentTQL VL - 27 ER - TY - CONF AU - Krishnamurthy, Ranjith AU - Piskachev, Goran AU - Bodden, Eric ID - 33838 TI - To what extent can we analyze Kotlin programs using existing Java taint analysis tools? ER - TY - CONF AU - Piskachev, Goran AU - Dziwok, Stefan AU - Koch, Thorsten AU - Merschjohann, Sven AU - Bodden, Eric ID - 33837 TI - How far are German companies in improving security through static program analysis tools? ER - TY - JOUR AB - We present a novel algorithm that allows us to gain detailed insight into the effects of sparsity in linear and nonlinear optimization, which is of great importance in many scientific areas such as image and signal processing, medical imaging, compressed sensing, and machine learning (e.g., for the training of neural networks). Sparsity is an important feature to ensure robustness against noisy data, but also to find models that are interpretable and easy to analyze due to the small number of relevant terms. It is common practice to enforce sparsity by adding the ℓ1-norm as a weighted penalty term. In order to gain a better understanding and to allow for an informed model selection, we directly solve the corresponding multiobjective optimization problem (MOP) that arises when we minimize the main objective and the ℓ1-norm simultaneously. As this MOP is in general non-convex for nonlinear objectives, the weighting method will fail to provide all optimal compromises. To avoid this issue, we present a continuation method which is specifically tailored to MOPs with two objective functions one of which is the ℓ1-norm. Our method can be seen as a generalization of well-known homotopy methods for linear regression problems to the nonlinear case. Several numerical examples - including neural network training - demonstrate our theoretical findings and the additional insight that can be gained by this multiobjective approach. AU - Bieker, Katharina AU - Gebken, Bennet AU - Peitz, Sebastian ID - 20731 IS - 11 JF - IEEE Transactions on Pattern Analysis and Machine Intelligence TI - On the Treatment of Optimization Problems with L1 Penalty Terms via Multiobjective Continuation VL - 44 ER - TY - JOUR AU - Kundisch, Dennis AU - Muntermann, J. AU - Oberländer, A. M. AU - Rau, D. AU - Röglinger, M. AU - Schoormann, T. AU - Szopinski, Daniel ID - 23566 IS - 4 JF - Business & Information Systems Engineering TI - An update for taxonomy designers: Methodological guidance from information systems research VL - 64 ER - TY - BOOK AU - Eke, Norbert AU - Zaimoglu , Feridun ID - 33842 TI - Durchdrungenheit. Texte und Gespräche. ER - TY - JOUR AU - Moritzer, Elmar AU - Elsner, Christian Lennart ID - 33859 IS - 1 JF - Macromolecular Symposia TI - Investigation and Improvement of Processing Parameters of a Copper-Filled Polymer Filament in Fused Filament Fabrication as a Basis for the Fabrication of Low-Porosity Metal Parts VL - 404 ER - TY - JOUR AU - Moritzer, Elmar AU - Wächter, Julian ID - 33861 IS - 1 JF - Macromolecular Symposia TI - Development of a Procedure for the Assessment of Material Potentials under Consideration of the Weld Seam Quality for Multi-Material Applications in the FDM Process VL - 404 ER - TY - BOOK AB - Lightweight materials such as aluminium and ultra-high-strength steel are increasingly being used in modern material mixed design in car body construction. As a fixing method for hybrid joining with structural adhesive, clinching has the advantage over other mechanical joining technologies that different materials can be joined without an auxiliary joining part and pre-hole. Due to the large degree of deformation in the joining partners, strong in-plane and out-of-plane material flows occur during the setting process, which can lead to plastic deformation. The aim of this work is the further development of shear-clinching for low-deformation of aluminium-steel joints. To gain a basic understanding of the joint deformation, the deformation of the joint partners during the setting process is identified step by step. Based on the knowledge gained, the deformation-related influencing factors are investigated experimentally. Thus, optimisation approaches as well as suggested handling methods for the production of a low-deformation shear-clinching joint are derived. For the realisation of the common narrow flange, which is to be characterised as deformation-sensitive due to a small edge distance, a numerically supported tool modification is carried out and subsequently experimentally validated. AU - Han, Daxin ID - 33865 TI - Deformationsarme Fügeverbindungen mittels prozessoptimiertem Schneidclinchen ER - TY - GEN AU - Itner, Dominik AU - Gravenkamp, Hauke AU - Dreiling, Dmitrij AU - Birk, Carolin AU - Henning, Bernd ID - 17090 TI - Differentiation of an SBFE model in the context of material parameter determination ER - TY - BOOK ED - Famula, Marta ED - Witschel, Verena ID - 33876 TI - Theater und Krise. Paradigmen der Störung in Dramentexten und Bühnenkonzepten nach 2000, (= Drama zwischen Text und Bühne 1) ER - TY - GEN AU - Laux, Florian AU - Kundisch, Dennis ID - 33884 TI - Judgment or Choice? An Experimental Comparison of Evaluation Approaches for External Crowdvoting ER - TY - JOUR AB - AbstractGenetic factors are relevant for both eating disorders and body weight regulation. A recent genome-wide association study (GWAS) for anorexia nervosa (AN) detected eight genome-wide significant chromosomal loci. One of these loci, rs10747478, was also genome-wide and significantly associated with body mass index (BMI). The nearest coding gene is the Polypyrimidine Tract Binding Protein 2 gene (PTBP2). To detect mutations in PTBP2, Sanger sequencing of the coding region was performed in 192 female patients with AN (acute or recovered) and 191 children or adolescents with (extreme) obesity. Twenty-five variants were identified. Twenty-three of these were predicted to be pathogenic or functionally relevant in at least one in silico tool. Two novel synonymous variants (p.Ala77Ala and p.Asp195Asp), one intronic SNP (rs188987764), and the intronic deletion (rs561340981) located in the highly conserved region of PTBP2 may have functional consequences. Ten of 20 genes interacting with PTBP2 were studied for their impact on body weight regulation based on either previous functional studies or GWAS hits for body weight or BMI. In a GWAS for BMI (Pulit et al. 2018), the number of genome-wide significant associations at the PTBP2 locus was different between males (60 variants) and females (two variants, one of these also significant in males). More than 65% of these 61 variants showed differences in the effect size pertaining to BMI between sexes (absolute value of Z-score >2, two-sided p < 0.05). One LD block overlapping 5′UTR and all coding regions of PTBP2 comprises 56 significant variants in males. The analysis based on sex-stratified BMI GWAS summary statistics implies that PTBP2 may have a more pronounced effect on body weight regulation in males than in females. AU - Zheng, Yiran AU - Rajcsanyi, Luisa Sophie AU - Herpertz-Dahlmann, Beate AU - Seitz, Jochen AU - de Zwaan, Martina AU - Herzog, Wolfgang AU - Ehrlich, Stefan AU - Zipfel, Stephan AU - Giel, Katrin AU - Egberts, Karin AU - Burghardt, Roland AU - Föcker, Manuel AU - Al-Lahham, Saad AU - Peters, Triinu AU - Libuda, Lars AU - Antel, Jochen AU - Hebebrand, Johannes AU - Hinney, Anke ID - 32326 IS - 1 JF - Translational Psychiatry KW - Biological Psychiatry KW - Cellular and Molecular Neuroscience KW - Psychiatry and Mental health SN - 2158-3188 TI - PTBP2 – a gene with relevance for both Anorexia nervosa and body weight regulation VL - 12 ER - TY - JOUR AB - Abstract Purpose The COVID-19 pandemic and public measures have a direct impact on the nutrition situation; studies show changes in food consumption, eating behavior or body weight but complex pattern analyses of changes rarely exist. Methods During the first German lockdown, a web-based survey was conducted among adults. It included 33 questions about changes in food intake, eating habits and physical activity, as well as anthropometrics and sociodemographic factors. Patterns of change were calculated based on changes in food intake and eating habits using two-step cluster analysis. To identify influencing factors for assignment to the patterns of change, binary logistic regression analyses were performed. Results Data from 2103 participants (81% female, 40 ± 14 years) were considered for analysis. Increased stockpiling, cooking, and variation in preparation was reported by 50–70%. The constant pattern (C-P, 36%) reported little change besides the above. The health-oriented pattern (HO-P; 37%) reported eating more healthy foods, avoiding unhealthy foods, and eating less and less frequently. The emotional-driven pattern (ED-P; 28%) exhibits higher influence of emotions on eating behavior, less avoidance of unhealthy foods, and increased consumption of sweets, pastries, and alcohol. The odds of changing eating behavior either to HO-P or ED-P were higher in women, people with migration background, younger participants, and increased with BMI categories. Conclusion Both, the ED-P and HO-P, exhibit distinctive reactions in eating habits and food intake when dealing with a distressing experience. In subgroups, these may lead to disturbances in eating behavior and increase the risk for eating disorders and obesity. AU - Bühlmeier, Judith AU - Frölich, Stefanie AU - Ludwig, Christine AU - Knoll-Pientka, Nadja AU - Schmidt, Börge AU - Föcker, Manuel AU - Libuda, Lars ID - 32328 JF - European Journal of Nutrition KW - Nutrition and Dietetics KW - Medicine (miscellaneous) SN - 1436-6207 TI - Changes in patterns of eating habits and food intake during the first German COVID-19 lockdown: results of a cross-sectional online survey ER - TY - JOUR AB - Abstract Purpose We aimed to investigate whether parental and siblings’ sugar-sweetened beverage (SSB) intake had prospective impact on children’s SSB consumption, and the potential sex difference in these associations. Methods This study included a total of 904 children and their parents enrolled from 2004 to 2011 China Health and Nutrition Survey (CHNS) cohort study. SSB consumption information was estimated using a short dietary questionnaire and total energy intake was assessed with three-day 24-h dietary assessments at recruitment and follow-up surveys. Multivariate logistic or linear regression analyses were used to assess the association for SSB consumption between parents, siblings and children after adjusting for age, body mass index (BMI) z-score, household income and parental educational level. Results In this study, a majority (87.6%) of children consumed SSB. Among them, the median consumption of SSB was 70.3 ml/day per capita and 205.4 ml/day per consumer. Parental SSB consumption was relevant to children’s SSB consumption, and this association was more pronounced in boys than in girls. Meanwhile, fathers seemed to have a stronger impact on whether children consume SSB than mothers which was reflected by lower P and higher OR. Additionally, children’s SSB intake was prospectively associated with their older siblings’ SSB consumption (Pfor trend < 0.03). Conclusions Parental and older siblings’ SSB consumption was relevant to children’s SSB intake. Particularly, boys were more susceptible to parental impact than girls, and fathers seemed to have a greater influence on children than mothers. AU - Liu, Xue-Ting AU - Xiong, Jing-Yuan AU - Xu, Yu-Jie AU - Zhao, Li AU - Libuda, Lars AU - Cheng, Guo ID - 33235 JF - European Journal of Nutrition KW - Nutrition and Dietetics KW - Medicine (miscellaneous) SN - 1436-6207 TI - Prospective association of family members’ sugar-sweetened beverages intake with children’s sugar-sweetened beverages consumption in China ER - TY - JOUR AU - Adan, Roger A.H. AU - Cirulli, Francesca AU - Dye, Louise AU - Higgs, Suzanne AU - Aarts, Kristien AU - van der Beek, Eline M. AU - Buitelaar, Jan K. AU - Destrebecq, Frédéric AU - De Witte, Elke AU - Hartmann, Tobias AU - Korosi, Aniko AU - Libuda, Lars AU - Dickson, Suzanne L. ID - 33234 JF - Brain, Behavior, and Immunity KW - Behavioral Neuroscience KW - Endocrine and Autonomic Systems KW - Immunology SN - 0889-1591 TI - Towards new nutritional policies for brain health: A research perspective on future actions VL - 105 ER - TY - JOUR AB - Abstract Background In Sub-Saharan African countries, rapid urbanization and increasing socio-economic status are associated with a transition to decreased physical activity (PA). A more sedentary lifestyle is linked to increased body fat leading to increments in leptin levels. Since rodent and human studies in high-income countries have shown that starvation-induced hypoleptinemia triggers high PA, efforts are warranted to pursue the hypothesis that low leptin levels in lean children of low- and middle-income countries (LMIC) are also associated with high PA. Methods In this cross-sectional study, we assessed seven-day PA with triaxial accelerometry (ActiGraph GT3X) among 223 primary school children (9 to 12 years of age) in rural Tanzania. Moderate-to-vigorous PA (MVPA) and total accelerometer counts per day were outcome variables. Leptin was determined using enzyme linked immunosorbent assay tests from dried blood spots. Anthropometric assessments were conducted and food insecurity and socio-demographic data were gathered using semi-structured interviews. Results In this sample of school children in rural Tanzania, leptin concentrations (median: 0.91 ng/mL, P25: 0.55, P75: 1.69), body mass index z-scores (median: -1.35, P25: -1.93, P75: -0.82), and height-for-age-z-scores (median: -1.16, P25: -1.96, P75: -0.61) were low. In contrast, PA levels were high with a median MVPA time of 119 min/day. Linear regression confirmed that leptin levels were negatively associated with MVPA (beta: -18.1; 95%CI: -29.7; -6.5; p = 0.002) and total accelerometer counts (beta: -90,256; 95%CI: -154,146; -26,365; p = 0.006). Children residing in areas with better infrastructure had lower MVPA levels (p < 0.001) and tended to have higher leptin levels (p = 0.062) than children residing in areas only reachable via dirt roads. Conclusion Our cross-sectional field study is the first that supports the hypothesis of low leptin levels as a potential endocrine trigger of high PA in lean children of a LMIC. We observed early signs of a PA transition towards a less active lifestyle in a subgroup residing in areas with better infrastructure that concomitantly tended to have higher leptin concentrations. Considering that area-dependent PA differences were more pronounced among girls than boys, whereas differences in leptin levels were less pronounced, not only biological, but also external factors explain PA transition. AU - Ludwig, Christine AU - Knoll-Pientka, Nadja AU - Mwanri, Akwilina AU - Erfle, Celina AU - Onywera, Vincent AU - Tremblay, Mark S. AU - Bühlmeier, Judith AU - Luzak, Agnes AU - Ferland, Maike AU - Schulz, Holger AU - Libuda, Lars AU - Hebebrand, Johannes ID - 33385 IS - 1 JF - BMC Public Health KW - Public Health KW - Environmental and Occupational Health SN - 1471-2458 TI - Low leptin levels are associated with elevated physical activity among lean school children in rural Tanzania VL - 22 ER - TY - JOUR AB - Abstract Background/objectives The transition to adolescence is characterised by considerable behavioural changes, including diet. This study describes the level of obesogenic eating behaviours in 10- and 15-year-olds, and their association with dietary intake. Subjects/methods Participants of the 10- and 15-year follow-ups of the German GINIplus and LISA birth cohort studies were included (N10 = 2257; N15 = 1880). Eating behaviours and dietary intake were assessed via self-report questionnaires. Sex-stratified, cross-sectional associations of “external eating”, “emotional eating” and “dietary restraint” (the latter at age 15 years only) with dietary intake (17 food groups—categorised into tertiles, macronutrients, and total energy) were assessed using multinomial logistic or multiple linear regression as required, adjusting for covariates and correcting for multiple testing. Results Reported levels of eating behaviours were low in both age-groups. External eating was higher in 10-year-old males than females, while all eating behaviours were most pronounced in 15-year-old females. At 10 years, emotional eating was associated with medium vegetable intake in females (Relative Risk Ratio (RRR) = 1.84, p = 0.0017). At 15 years, external eating was associated with total energy (kJ) in females (β = 718, p = 0.0002) and high butter intake in males (RRR = 1.96, p = 0.0019). Dietary restraint in females was inversely associated with total energy (β = −967, p < 0.0001) and omega-3 fatty acids (Means Ratio (MR) = 0.94, p = 0.0017), and positively associated with high fruit (RRR = 2.20, p = 0.0003) and whole grains (RRR = 1.94, p = 0.0013). Conclusion Obesogenic eating behaviour scores are low among children and adolescents of a predominantly high socioeconomic status population and present only few associations with specific aspects of diet, mainly among adolescent females. AU - Marb, Anne AU - Libuda, Lars AU - Standl, Marie AU - Koletzko, Sibylle AU - Bauer, Carl-Peter AU - Schikowski, Tamara AU - Berdel, Dietrich AU - von Berg, Andrea AU - Herberth, Gunda AU - Bühlmeier, Judith AU - Harris, Carla P. ID - 33386 JF - European Journal of Clinical Nutrition KW - Nutrition and Dietetics KW - Medicine (miscellaneous) SN - 0954-3007 TI - Obesogenic eating behaviour and dietary intake in German children and adolescents: results from the GINIplus and LISA birth cohort studies ER - TY - CONF AU - Kostitsyna, Irina AU - Scheideler, Christian AU - Warner, Daniel ED - Aspnes, James ED - Michail, Othon ID - 30987 SN - 1868-8969 T2 - 1st Symposium on Algorithmic Foundations of Dynamic Networks (SAND 2022) TI - Brief Announcement: Fault-Tolerant Shape Formation in the Amoebot Model VL - 221 ER - TY - CHAP AU - Famula, Marta ED - Famula, Marta ED - Witschel, Verena ID - 33900 T2 - Theater und Krise. Paradigmen der Störung in Dramentexten und Bühnenkonzepten nach 2000. (= Drama zwischen Text und Bühne 1) TI - Die Widerständigkeit der Wirklichkeit. Krise in Wolfram Lotzʼ Drama Der große Marsch ER - TY - CHAP AU - Famula, Marta AU - Witschel, Verena ED - Famula, Marta ED - Witschel, Verena ID - 33901 T2 - Theater und Krise. Paradigmen der Störung in Dramentexten und Bühnenkonzepten nach 2000. (= Drama zwischen Text und Bühne 1) TI - Einleitung ER - TY - CONF AB - Workshops on business model generation lead to collaborative work phases and discussions on business models. Therefore, tools such as the Business Model Canvas are used, typically filled with sticky notes. Generated content needs to be digitized in a time-consuming manual follow-up as part of the documentation and basis for a further use of the results in the company. In addition, there are challenges, such as decentralized work and digital workshop formats. Augmented Reality offers a way to reduce the digitization effort and enables decentralized work. In this research, the potentials of the use of AR technology in workshops on business model generation is investigated. Therefore, functions are implemented and evaluated in a demonstrator that reduces digitization effort and enable distributed work. AU - Gräßler, Iris AU - Grewe, Benedikt AU - Kramer, Hendrik ID - 33914 KW - business model generation KW - augmented reality KW - workshop KW - collaborative work KW - digitization KW - AR-supported workshop concept KW - immersive technologies KW - decentralized work KW - business model canvas T2 - LUT Scientific and Expertise Publications TI - Supporting Business Model Generation with Augmented Reality ER - TY - GEN AU - Friesen, Olga AU - Claes, Leander AU - Feldmann, Nadine AU - Henning, Bernd ID - 6558 TI - Estimation of piezoelectric material parameters of ring-shaped specimens ER - TY - BOOK ED - Famula, Marta ED - Özelt, Clemens ED - Schneider, Martin ID - 33943 TI - Die Kunst der Theatereröffnung. Ästhetik und Kulturpoetik von Vorreden und Vorspielen vom 17. Jahrhundert bis heute [in Vorbereitung] (Marta Famula ist Herausgeberin der Schriftenreihe "Drama zwischen Text und Bühne" zus. mit Agata Mirecka und Paul Martin Langner) VL - 2 ER - TY - CHAP AU - Rumlich, Dominik ED - Piske, Thorsten ED - Steinlen, Anja ID - 33948 T2 - Cognition and second language acquisition TI - Exploring the importance of prior knowledge and verbal cognitive abilities for foreign language learning ER - TY - JOUR AU - Meer, Philipp AU - Hartmann, Johanna AU - Rumlich, Dominik ID - 25831 IS - 3 JF - Applied Linguistics TI - Attitudes of German high school students toward different varieties of English VL - 43 ER - TY - BOOK ED - Famula, Marta ED - Witschel, Verena ID - 33944 TI - Theater und Krise. Paradigmen der Störung in Dramentexten und Bühnenkonzepten nach 2000 (Marta Famula ist Herausgeberin der Schriftenreihe "Drama zwischen Text und Bühne" zus. mit Agata Mirecka und Paul Martin Langner) VL - 1 ER - TY - JOUR AU - Rumlich, Dominik ID - 33949 IS - 2 JF - Fremdsprachen Lehren und Lernen TI - Weniger Kompetenz, mehr Resonanz. Contra Position VL - 51 ER - TY - JOUR AB - Abstract Smart Services eröffnen vielfältige Geschäftsmöglichkeiten für produzierende Unternehmen und erfordern zugleich einschneidende Anpassungen ihrer häufig historisch gewachsenen Wertschöpfung. Dieser Beitrag zeigt eine Web-Applikation, die es produzierenden Unternehmen erlaubt, die erforderliche Smart-Service-Transformation zu planen. Dafür werden umfassendes Lösungswissen bereitgestellt und eine individuelle Gestaltungsempfehlungen für die zukünftige Wertschöpfung als Smart-Service-Anbieter gegeben. AU - Reinhold, Jannik AU - Siewert, Michael AU - Scholtysik, Michel AU - Rasor, Anja AU - Koldewey, Christian AU - Dumitrescu, Roman ID - 33956 IS - 5 JF - Zeitschrift für wirtschaftlichen Fabrikbetrieb KW - Management Science and Operations Research KW - Strategy and Management KW - General Engineering SN - 2511-0896 TI - Software-gestützte Planung der Smart-Service-Transformation VL - 117 ER - TY - JOUR AB - AbstractComprehensive data understanding is a key success driver for data analytics projects. Knowing the characteristics of the data helps a lot in selecting the appropriate data analysis techniques. Especially in data-driven product planning, knowledge about the data is a necessary prerequisite because data of the use phase is very heterogeneous. However, companies often do not have the necessary know-how or time to build up solid data understanding in connection with data analysis. In this paper, we develop a methodology to organize and categorize and thus understand use phase data in a way that makes it accessible to general data analytics workflows, following a design science research approach. We first present a knowledge base that lists typical use phase data from a product planning view. Second, we develop a taxonomy based on standard literature and real data objects, which covers the diversity of the data considered. The taxonomy provides 8 dimensions that support classification of use phase data and allows to capture data characteristics from a data analytics view. Finally, we combine both views by clustering the objects of the knowledge base according to the taxonomy. Each of the resulting clusters covers a typical combination of analytics relevant characteristics occurring in practice. By abstracting from the diversity of use phase data into artifacts with manageable complexity, our approach provides guidance to choose appropriate data analysis and AI techniques. AU - Panzner, Melina AU - von Enzberg, Sebastian AU - Meyer, Maurice AU - Dumitrescu, Roman ID - 33953 JF - Journal of the Knowledge Economy KW - Economics and Econometrics SN - 1868-7865 TI - Characterization of Usage Data with the Help of Data Classifications ER - TY - CONF AU - Panzner, Melina AU - Meyer, Maurice AU - Enzberg, Sebastian von AU - Dumitrescu, Roman ID - 33706 KW - General Medicine SN - 2212-8271 T2 - Procedia CIRP TI - Business-to-Analytics Canvas - Translation of Product Planning-Related Business Use Cases into Concrete Data Analytics Tasks VL - 109 ER - TY - CONF AU - Boeddeker, Christoph AU - Cord-Landwehr, Tobias AU - von Neumann, Thilo AU - Haeb-Umbach, Reinhold ID - 33954 T2 - Interspeech 2022 TI - An Initialization Scheme for Meeting Separation with Spatial Mixture Models ER - TY - JOUR AU - Reinhold, Jannik AU - Koldewey, Christian AU - Dumitrescu, Roman ID - 33955 JF - Procedia CIRP KW - General Medicine SN - 2212-8271 TI - Value Creation Framework and Roles for Smart Services VL - 109 ER - TY - GEN AB - Recent studies have revealed that 87 % to 96 % of the Android apps using cryptographic APIs have a misuse which may cause security vulnerabilities. As previous studies did not conduct a qualitative examination of the validity and severity of the findings, our objective was to understand the findings in more depth. We analyzed a set of 936 open-source Java applications for cryptographic misuses. Our study reveals that 88.10 % of the analyzed applications fail to use cryptographic APIs securely. Through our manual analysis of a random sample, we gained new insights into effective false positives. For example, every fourth misuse of the frequently misused JCA class MessageDigest is an effective false positive due to its occurrence in a non-security context. As we wanted to gain deeper insights into the security implications of these misuses, we created an extensive vulnerability model for cryptographic API misuses. Our model includes previously undiscussed attacks in the context of cryptographic APIs such as DoS attacks. This model reveals that nearly half of the misuses are of high severity, e.g., hard-coded credentials and potential Man-in-the-Middle attacks. AU - Wickert, Anna-Katharina AU - Baumgärtner, Lars AU - Schlichtig, Michael AU - Mezini, Mira ID - 33959 TI - To Fix or Not to Fix: A Critical Study of Crypto-misuses in the Wild ER - TY - JOUR AU - Scharlau, Ingrid AU - Schreiber, Christine ID - 33960 IS - 55 JF - Psychologieunterricht TI - Facharbeiten schreiben - Informationen für Schülerinnen und Schüler ER - TY - CONF AU - Aguiliera, Marcos AU - Richa, Andréa W. AU - Schwarzmann, Alexander A. AU - Panconesi, Alessandro AU - Scheideler, Christian AU - Woelfel, Philipp ED - Milani, Alessia ED - Woelfel, Philipp ID - 33967 T2 - PODC ’22: ACM Symposium on Principles of Distributed Computing, Salerno, Italy, July 25 - 29, 2022 TI - 2022 Edsger W. Dijkstra Prize in Distributed Computing ER - TY - GEN AU - Mügge, Nils AU - Kronberg, Alexander AU - Glushenkov, Maxim AU - Inguva, Venkatesh AU - Kenig, Eugeny Y. ID - 33972 T2 - 1st Conference on Energy, Environment and Digital Transition E2DT TI - A Thermal Model for Recuperative Heat Engines Operating with Dense Working Fluids ER - TY - GEN ED - Scheideler, Christian ID - 33968 SN - 978-3-95977-255-6 TI - 36th International Symposium on Distributed Computing, DISC 2022, October 25-27, 2022, Augusta, Georgia, USA VL - 246 ER - TY - JOUR AU - Moritzer, Elmar AU - Driediger, Christine ID - 33988 IS - 1 JF - Macromolecular Symposia KW - digital light processing KW - material combination KW - reactive direct bonding KW - vat photopolymerization SN - 1022-1360 TI - Reactive Direct Bonding of Digital Light Process Components VL - 404 ER - TY - GEN AU - Moritzer, Elmar AU - Elsner, Christian Lennart ID - 33987 SN - 0023–5563 T2 - Kunststoffe TI - Mit Gestaltungsrichtlinien zum Erfolg VL - 11/2022 ER - TY - CONF AB - Digital platforms have already led to disruptions in multiple B2C markets and are becoming increasingly dominant in B2B markets. As a result, more and more companies are trying to participate in the platform economy. However, the successful development and operation of a digital platform is associated with significant challenges, which leads to 85% of all platforms failing. A core challenge is the dynamic nature of the platform economy, with varying strategic objectives at different stages in the platform lifecycle. Platform operators must continuously monitor platform progress and adjust their strategy. Utilizing action research in the real-world platform project AI Marketplace, we developed a lifecycle-oriented performance management approach for digital platforms in B2B markets. It enables platform operators to reflect on their position in the platform lifecycle, derive relevant strategic objectives, and monitor them with suitable key performance indicators. Hence, allowing them to secure the long-term success of their platform business. AU - Özcan, Leon AU - Kirchberg, Lisa AU - Koldewey, Christian AU - Dumitrescu, Roman ED - Bitran, Iain ED - Bitetti, Leandro ED - Conn, Steffen ED - Fishburn, Jessica ED - Huizingh, Eelko ED - Torkkeli, Marko ED - Yang, Jialei ID - 33997 KW - Digital Platform KW - Two-Sided Market KW - Multi-Sided Market KW - Platform Lifecycle KW - Platform Monitoring KW - Performance Management T2 - The Role of Innovation: Past, Present, Future TI - Performance Management Approach for Digital Platforms in B2B Markets ER - TY - CONF AB - In the course of digitalization, digital platforms are unleashing their full disruptive potential and are already dominating the first industries (e.g., hotel industry). As a result of this success, more and more companies want to build their own platforms and participate in the success. However, building and operating a digital platform involves multiple challenges and most of such ambitions fail. Since most digital platforms fail, strategic leadership of digital platforms must consider both success factors and reasons for platform failure. For this purpose, we conducted a systematic literature analysis and identified 24 success as well as failure factors in 9 dimensions. From a scientific perspective, the article provides a structured analysis of success and failure factors of digital platforms, which previously did not exist in literature. Practitioners can use the resulting knowledge base to successfully manage platform activities and avoid pitfalls. AU - Özcan, Leon AU - Koldewey, Christian AU - Duparc, Estelle AU - van der Valk, Hendrik AU - Otto, Boris AU - Dumitrescu, Roman ID - 33991 KW - Digital Platform KW - Multi-sided Market KW - Two-sided Market KW - Success Factor KW - Failure Factor TI - Why do Digital Platforms succeed or fail? - A Literature Review on Success and Failure Factors ER - TY - CONF AU - Lienen, Christian AU - Platzner, Marco ID - 34007 TI - Task Mapping for Hardware-Accelerated Robotics Applications using ReconROS ER - TY - CHAP AU - Scharlau, Ingrid ED - Haacke-Werron, Stefanie ED - Karsten, Andrea ED - Scharlau, Ingrid ID - 34015 T2 - Reflexive Schreibwissenschaft TI - Hundertstelmillimeter VL - 14 ER - TY - BOOK ED - Haacke-Werron, Stefanie ED - Karsten, Andrea ED - Scharlau, Ingrid ID - 34013 TI - Reflexive Schreibwissenschaft VL - 14 ER - TY - JOUR AB - Lightweight construction has increasingly become the focus of scientific research in recent years, not least due to the constantly increasing fuel price, which is a key factor in the economic viability of many companies. In this respect, the use of hybrid structures, made of dissimilar materials offers many advantages. However, such hybrid structures often have undesirable side effects. For example, brittle intermetallic phases are formed when aluminum and steel are welded. Clinching as a mechanical joining process does not produce such intermetallic phases since the connection is realized through form and force closure. In this process, a punch passes through two or more sheets and forms them into a permanent joint in a die. In the present work, the corrosion phenomena of an aluminum-steel clinched joint have been investigated by both experiments and numerical simulations in order to explain the superior fatigue behavior of pre-corroded joints. Therefore, the clinched joints have been corroded by a three-week salt-spray test. In addition, the electric potential and the von Mises stress are calculated under the assumption of a static loading. The results of both experiments and numerical simulations can explain the improvement in the fatigue behavior of the corroded specimens. This phenomenon can be attributed to the accumulation of corrosion products in small gaps between the joined metal sheets. AU - Harzheim, Sven AU - Ewenz, Lars AU - Zimmermann, Martina AU - Wallmersperger, Thomas ID - 34253 JF - Journal of Advanced Joining Processes KW - Mechanical Engineering KW - Mechanics of Materials KW - Engineering (miscellaneous) KW - Chemical Engineering (miscellaneous) SN - 2666-3309 TI - Corrosion Phenomena and Fatigue Behavior of Clinched Joints: Numerical and Experimental Investigations VL - 6 ER - TY - JOUR AB - Clinching is the manufacturing process of joining two or more metal sheets under high plastic deformation by form and force closure without thermal support and auxiliary parts. Clinch connections are applicable to difficult-to-join hybrid material combinations, such as steel and aluminum. Therefore, this technology is interesting for the application of AISI 304 components, as this material is widely used as a highly formable sheet material. A characteristic feature of AISI 304 is its metastability, i.e., the face-centered cubic (fcc) γ-austenite can transform into a significantly stronger body-centered cubic (bcc) α’-martensite under plastic deformation. This work investigates the effect of heat treatment—a process that involves the formation of an oxidation layer on the sheet surface—on the forming process during joining and the resulting mechanical properties of clinch joints made from AISI 304. For this purpose, different joints made from non-heat treated and heat-treated sheets were examined using classical metallography and advanced SEM techniques, accompanied by further investigations, such as hardness and feritscope measurements. The shear tensile strength was determined, and the fracture behavior of the samples was investigated. Clear influences of heat-treatment-induced surface roughness on the joint geometry and strength were observed. AU - Zeuner, André Till AU - Ewenz, Lars AU - Kalich, Jan AU - Schöne, Sebastian AU - Füssel, Uwe AU - Zimmermann, Martina ID - 34252 IS - 9 JF - Metals KW - General Materials Science KW - Metals and Alloys SN - 2075-4701 TI - The Influence of Heat Treatment on the Microstructure, Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints VL - 12 ER -