TY - JOUR AB - ELDIRK methods are defined to have an Explicit Last stage in the general Butcher array of Diagonal Implicit Runge-Kutta methods, with the consequence, that no additional system of equations must be solved, compared to the embedded RK method. Two general formulations for second- and third-order ELDIRK methods have been obtained recently in Mahnken [21] with specific schemes, e.g. for the embedded implicit Euler method, the embedded trapezoidal-rule and the embedded Ellsiepen method. In the first part of this paper, we investigate some general stability characteristics of ELDIRK methods, and it will be shown that the above specific RK schemes are not A-stable. Therefore, in the second part, the above-mentioned general formulations are used for further stability investigations, with the aim to construct new second- and third-order ELDIRK methods which simultaneously are A-stable. Two numerical examples are concerned with the curing for a thermosetting material and phase-field RVE modeling for crystallinity and orientation. The numerical results confirm the theoretical results on convergence order and stability. AU - Mahnken, Rolf AU - Westermann, Hendrik ID - 52233 JF - Computational Mechanics KW - Applied Mathematics KW - Computational Mathematics KW - Computational Theory and Mathematics KW - Mechanical Engineering KW - Ocean Engineering KW - Computational Mechanics SN - 0178-7675 TI - Construction of A-stable explicit last-stage diagonal implicit Runge–Kutta (ELDIRK) methods ER - TY - JOUR AU - Uhe, Benedikt AU - Kuball, Clara-Maria AU - Merklein, Marion AU - Meschut, Gerson ID - 51116 JF - Production Engineering TI - Corrosion behaviour of self-piercing riveted joints with uncoated rivets in high nitrogen steel ER - TY - JOUR AB - Abstract Background An infection with SARS-CoV-2 can lead to a variety of symptoms and complications, which can impair athletic activity. Objective We aimed to assess the clinical symptom patterns, diagnostic findings, and the extent of impairment in sport practice in a large cohort of athletes infected with SARS-CoV-2, both initially after infection and at follow-up. Additionally, we investigated whether baseline factors that may contribute to reduced exercise tolerance at follow-up can be identified. Methods In this prospective, observational, multicenter study, we recruited German COVID elite-athletes (cEAs, n = 444) and COVID non-elite athletes (cNEAs, n = 481) who tested positive for SARS-CoV-2 by PCR (polymerase chain reaction test). Athletes from the federal squad with no evidence of SARS-CoV-2 infection served as healthy controls (EAcon, n = 501). Questionnaires were used to assess load and duration of infectious symptoms, other complaints, exercise tolerance, and duration of training interruption at baseline and at follow-up 6 months after baseline. Diagnostic tests conducted at baseline included resting and exercise electrocardiogram (ECG), echocardiography, spirometry, and blood analyses. Results Most acute and infection-related symptoms and other complaints were more prevalent in cNEA than in cEAs. Compared to cEAs, EAcon had a low symptom load. In cNEAs, female athletes had a higher prevalence of complaints such as palpitations, dizziness, chest pain, myalgia, sleeping disturbances, mood swings, and concentration problems compared to male athletes (p < 0.05). Until follow-up, leading symptoms were drop in performance, concentration problems, and dyspnea on exertion. Female athletes had significantly higher prevalence for symptoms until follow-up compared to male. Pathological findings in ECG, echocardiography, and spirometry, attributed to SARS-CoV-2 infection, were rare in infected athletes. Most athletes reported a training interruption between 2 and 4 weeks (cNEAs: 52.9%, cEAs: 52.4%), while more cNEAs (27.1%) compared to cEAs (5.1%) had a training interruption lasting more than 4 weeks (p < 0.001). At follow-up, 13.8% of cNEAs and 9.9% of cEAs (p = 0.24) reported their current exercise tolerance to be under 70% compared to pre-infection state. A persistent loss of exercise tolerance at follow-up was associated with persistent complaints at baseline, female sex, a longer break in training, and age > 38 years. Periodical dichotomization of the data set showed a higher prevalence of infectious symptoms such as cough, sore throat, and coryza in the second phase of the pandemic, while a number of neuropsychiatric symptoms as well as dyspnea on exertion were less frequent in this period. Conclusions Compared to recreational athletes, elite athletes seem to be at lower risk of being or remaining symptomatic after SARS-CoV-2 infection. It remains to be determined whether persistent complaints after SARS-CoV-2 infection without evidence of accompanying organ damage may have a negative impact on further health and career in athletes. Identifying risk factors for an extended recovery period such as female sex and ongoing neuropsychological symptoms could help to identify athletes, who may require a more cautious approach to rebuilding their training regimen. Trial Registration Number DRKS00023717; 06.15.2021—retrospectively registered. AU - Widmann, Manuel AU - Gaidai, Roman AU - Schubert, Isabel AU - Grummt, Maximilian AU - Bensen, Lieselotte AU - Kerling, Arno AU - Quermann, Anne AU - Zacher, Jonas AU - Vollrath, Shirin AU - Bizjak, Daniel Alexander AU - Beckendorf, Claudia AU - Egger, Florian AU - Hasler, Erik AU - Mellwig, Klaus-Peter AU - Fütterer, Cornelia AU - Wimbauer, Fritz AU - Vogel, Azin AU - Schoenfeld, Julia AU - Wüstenfeld, Jan C. AU - Kastner, Tom AU - Barsch, Friedrich AU - Friedmann-Bette, Birgit AU - Bloch, Wilhelm AU - Meyer, Tim AU - Mayer, Frank AU - Wolfarth, Bernd AU - Roecker, Kai AU - Reinsberger, Claus AU - Haller, Bernhard AU - Niess, Andreas M. AU - Birnbaum, Mike Peter AU - Burgstahler, Christof AU - Cassel, Michael AU - Deibert, Peter AU - Esefeld, Katrin AU - Erz, Gunnar AU - Greiss, Franziska AU - Halle, Martin AU - Hesse, Judith AU - Keller, Karsten AU - Kopp, Christine AU - Matits, Lynn AU - Predel, Hans Georg AU - Rüdrich, Peter AU - Schneider, Gerald AU - Stapmanns, Philipp AU - Steinacker, Jürgen Michael AU - Szekessy, Sarah AU - Venhorst, Andreas AU - Zapf, Stephanie AU - Zickwolf, Christian ID - 50798 JF - Sports Medicine KW - Physical Therapy KW - Sports Therapy and Rehabilitation KW - Orthopedics and Sports Medicine SN - 0112-1642 TI - COVID-19 in Female and Male Athletes: Symptoms, Clinical Findings, Outcome, and Prolonged Exercise Intolerance—A Prospective, Observational, Multicenter Cohort Study (CoSmo-S) ER - TY - GEN AU - Ustimova, Magdalina AU - Sadeghi-Kohan, Somayeh AU - Hellebrand, Sybille ID - 51799 TI - Crosstalk-Aware Simulation of Interconnects Using Artificial Neural Networks ER - TY - CHAP AU - Eke, Norbert Otto ED - Egidi, Margreth ED - Peters , Ludmila ED - Schmidt, Jochen ID - 50983 T2 - (Un)verfügbar – Kulturen des Heiligen TI - Das Heilige – Versuch einer Definition ER - TY - JOUR AU - Herdramm, Henrike ID - 52652 JF - BloKK. Der Blog des Zentrums für Komparative Theologie und Kulturwissenschaften KW - Ideologiekritik KW - Tiertheologie KW - Tierethik TI - Das Potenzial von Ideologiekritik im Religionsunterricht ER - TY - CHAP AU - Vasylyeva, Tetyana AU - Ehmke, Timo AU - Gövert, Andre AU - Kassem, Amani AU - Niederhaus, Constanze ID - 52506 T2 - Mehrsprachigkeit in der Schule – Sprachbildung im und durch Sachunterricht TI - DaZ-Kompetenzen angehender Lehrkräfte des Faches Sachunterricht sowie der aus dem Sachunterricht hervorgehenden Fächer ER - TY - JOUR AU - Riese, Julia AU - Fasel, Henrik AU - Pannok, Maik AU - Lier, Stefan ID - 52388 JF - Sustainable Production and Consumption KW - Industrial and Manufacturing Engineering KW - Renewable Energy KW - Sustainability and the Environment KW - Environmental Chemistry KW - Environmental Engineering SN - 2352-5509 TI - Decentralized production concepts for bio-based polymers - implications for supply chains, costs, and the carbon footprint ER - TY - JOUR AU - Arends, Christian AU - Wolf, Lasse Lennart AU - Meinecke, Jasmin AU - Barkhofen, Sonja AU - Weich, Tobias AU - Bartley, Tim ID - 52876 IS - 1 JF - Physical Review Research KW - General Physics and Astronomy SN - 2643-1564 TI - Decomposing large unitaries into multimode devices of arbitrary size VL - 6 ER - TY - GEN AU - Dechert, Christopher AU - Kenig, Eugeny ID - 52573 TI - Der Einfluss von Mikrostrukturen auf die Flüssigkeitsausbreitung in strukturierten Packungen ER -