TY - GEN A1 - Wagner, Frank A1 - Kühhorn, Arnold A1 - Weiss, Thomas A1 - Otto, Dierk T1 - Influence of different parametrizations on the optimum design of a high pressure turbine blade firtree T2 - ASME Turbo Expo 2016, Turbomachinery Technical Conference and Exposition, Volume 7A, Structures and Dynamics, Seoul, South Korea, June 13–17, 2016 N2 - Today the design processes in the aero industry face many challenges. Apart from automation itself, a suitable parametric geometry setup plays a significant role in making workflows usable for optimization. At the same time there are tough requirements against the parametric model. For the lowest number of possible parameters, which should be intuitively ascertainable, a high flexibility has to be ensured. Within the parameter range an acceptable stability is necessary. Under these constraints the creation of such parametric models is a challenge, which should not be underestimated especially for a complex geometry. In this work different kinds of parametrization with different levels of complexity will be introduced and compared. Thereby several geometry elements will be used to handle the critical regions of the geometry. In the simplest case a combination of lines and arcs will be applied. These will be replaced by superior elements like a double arc construct or different formulations of b-splines. There will be an additional focus on the variation of spline degree and control points. To guarantee consistency a set of general parameters will be used next to the specific ones at the critical regions. The different parameter boundaries have a influence on the possible geometries and should therefore be tested separately before an optimization run. Y1 - 2016 SN - 978-0-7918-4983-5 U6 - https://doi.org/10.1115/GT2016-56749 PB - ASME CY - New York, NY ER - TY - GEN A1 - Brachmann, Johannes A1 - Lewalter, Thorsten A1 - Kuck, Karl-Heinz A1 - Andresen, Dietrich A1 - Willems, Stephan A1 - Spitzer, Stefan G. A1 - Straube, Florian A1 - Schumacher, Burghard A1 - Eckardt, Lars A1 - Danilovic, Dejan A1 - Dierk, Thomas A1 - Hochadel, Matthias A1 - Senges, Jochen T1 - Long-term symptom improvement and patient satisfaction following catheter ablation of supraventricular tachycardia: insights from the German ablation registry T2 - European Heart Journal Y1 - 2017 UR - https://academic.oup.com/eurheartj/article/38/17/1317/3074208 U6 - https://doi.org/10.1093/eurheartj/ehx101 SN - 1522-9645 VL - 38 IS - 17 SP - 1317 EP - 1326 ER - TY - GEN A1 - Zylla, Maura M. A1 - Brachmann, Johannes A1 - Lewalter, Thorsten A1 - Kuck, Karl-Heinz A1 - Andresen, Dietrich A1 - Willems, Stephan A1 - Spitzer, Stefan G. A1 - Straube, Florian A1 - Schumacher, Burghard A1 - Eckardt, Lars A1 - Hochadel, Matthias A1 - Senges, Jochen A1 - Katus, Hugo A. A1 - Dierk, Thomas T1 - Symptomatic arrhythmias after catheter ablation of atrioventricular nodal reentrant tachycardia (AVNRT): results from the German Ablation Registry T2 - Clinical Research in Cardiology KW - Catheter ablation, AVNRT, Complications, Registry, Long-term follow-up Y1 - 2020 U6 - https://doi.org/https://doi.org/10.1007/s00392-019-01576-x SN - 1861-0692 SN - 1861-0684 VL - 109 IS - 10 SP - 858 EP - 868 PB - Springer Nature Switzerland AG ER -