@incollection{WimmerSteinmetzGoedeletal., author = {Wimmer, Georg and Steinmetz, T. and G{\"o}del, N. and Clemens, M. and Kurz, S. and Bebendorf, M. and Rjasanow, S.}, title = {Symmetric Coupling of Finite-Element and Boundary-Element Methods for Electro-Quasistatic Field Simulations}, series = {Scientific Computing in Electrical Engineering (SCEE 2006), Series Mathematics in Industry 11}, booktitle = {Scientific Computing in Electrical Engineering (SCEE 2006), Series Mathematics in Industry 11}, editor = {Ciupricina, G. and Ioan, D.}, publisher = {Springer}, address = {Berlin, Heidelberg, New York}, isbn = {978-3-540-71979-3}, pages = {309 -- 316}, language = {en} } @article{BittnerZellnerWabraetal., author = {Bittner, Boris and Zellner, J. and Wabra, N. and von Hodenberg, M. and Schneider, S. and Schneider, R. and Schob, A. and Rudolph, G. and Gratzke, A. and Moffat, A.}, title = {Projection objective of a mcrolithographic projection exposure apparatus}, language = {en} } @article{HoefflinSauerSchiffleretal., author = {H{\"o}fflin, Dennis and Sauer, Christian and Schiffler, Andreas and Hartmann, J{\"u}rgen}, title = {Process Monitoring Using Synchronized Path Infrared Thermography in PBF-LB/M}, series = {Sensors}, volume = {22}, journal = {Sensors}, number = {16}, publisher = {MDPI}, doi = {10.3390/s22165943}, pages = {5943}, abstract = {Additive manufacturing processes, particularly Laser-Based Powder Bed Fusion of Metals (PBF-LB/M), enable the development of new application possibilities due to their manufacturing-specific freedom of design. These new fields of application require a high degree of component quality, especially in safety-relevant areas. This is currently ensured primarily via a considerable amount of downstream quality control. Suitable process monitoring systems promise to reduce this effort drastically. This paper introduces a novel monitoring method in order to gain process-specific thermal information during the manufacturing process. The Synchronized Path Infrared Thermography (SPIT) method is based on two synchronized galvanometer scanners allowing high-speed and high-resolution observations of the melt pool in the SWIR range. One scanner is used to steer the laser over the building platform, while the second scanner guides the field of view of an IR camera. With this setup, the melting process is observed at different laser powers, scan speeds and at different locations with respect to the laser position, in order to demonstrate the positioning accuracy of the system and to initially gain thermal process data of the melt pool and the heat-affected zone. Therefore, the SPIT system shows a speed independent overall accuracy of ±2 Pixel within the evaluated range. The system further allows detailed thermal observation of the melt pool and the surrounding heat-affected zone.}, language = {en} } @article{OchsWehnertHartmannetal., author = {Ochs, Dennis and Wehnert, Kira-Kristin and Hartmann, J{\"u}rgen and Schiffler, Andreas and Schmitt, Jan}, title = {Sustainable Aspects of a Metal Printing Process Chain with Laser Powder Bed Fusion (LPBF)}, series = {Procedia CIRP}, volume = {98}, journal = {Procedia CIRP}, publisher = {Elsevir}, pages = {613 -- 618}, abstract = {Production companies are getting more and more aware of the relevancy of energy costs and the environmental impact of their manufactured products. Hence, the knowledge about the energy intensity of new process technologies as metal printing becomes increasingly crucial. Therefore, data about the energy intensity of entire process chains allow a detailed assessment of the life cycle costs and environmental impact of metal printed parts. As metal printing with Laser Powder Bed Fusion (LPBF) is applied from rapid prototyping to serial manufacturing processes more and more, sustainability data are useful to support a valid scale-up scenario and energetic improvements of the 3D-printing machinery as well as peripheral aggregates used in the process chain. The contribution aims to increase the transparency of the LPBF process chain in terms of its energy consumption. Therefore a generalized model to assess sustainability aspects of metal printed parts is derived. For this purpose, the LPBF process chain with the essential pre-, main- and post-processes is evaluated regarding its energy intensity. Here, the sub-processes, for example wet and dry cleaning of the printer, sieving of the metal powder or sand-blasting of the part are analyzed as well as the main printing process. Based on the derived experimental data from an installed, industry-like process chain, a model is created, which tends to generalize the experimental findings to evaluate other metal printed parts and process chain variants in terms of their energy intensity.}, language = {en} } @article{BaureisPopkenHartmannetal., author = {Baureis, Peter and Popken, G. and Hartmann, M. and Milosiu, H. and Neubauer, H. and Oehler, F. and Peter, M.}, title = {A2.4-GHz ISM- Transmitter IC with Novel Quadrature Clock Generation Technique for a Localization Application}, series = {2005 IEEE MTT-S Digest}, journal = {2005 IEEE MTT-S Digest}, language = {en} } @book{Fruehbrodt, author = {Fr{\"u}hbrodt, Lutz}, title = {Die Liberalisierung der Telekommunikationsdienste}, address = {Wiesbaden}, language = {de} } @inproceedings{Claudia, author = {Claudia, Wunderlich}, title = {Teaching Intercultural Skills through a Global Business Simulation}, editor = {Ministerium f{\"u}r ausw{\"a}rtige Angelegenheiten der Ukraine, Diplomatische Akademie der Ukraine}, publisher = {Diplomatische Akademie der Ukraine}, address = {Kiev}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-43432}, pages = {264}, abstract = {This paper reports on how intercultural skills can be taught in English for Specific Purposes courses (ESP) in addition to reading, writing, listening, and speaking skills in a global business simulation}, language = {en} } @inproceedings{Juengst, author = {J{\"u}ngst, Heike Elisabeth}, title = {Insekten im Kindersachbuch - Objekt und Subjekt}, series = {Bonsels' Tierleben: Insekten und Kriechtiere in Kinder- und Jugendmedien ; [Sammelband zur Tagung "Bonsels' Tierleben", die vom 29. bis 31. Oktober 2014 an der Universit{\"a}t Bielefeld stattfand]}, booktitle = {Bonsels' Tierleben: Insekten und Kriechtiere in Kinder- und Jugendmedien ; [Sammelband zur Tagung "Bonsels' Tierleben", die vom 29. bis 31. Oktober 2014 an der Universit{\"a}t Bielefeld stattfand]}, editor = {Josting, Petra and Schmideler, Sebastian}, publisher = {Schneider Verlag Hohengehren}, address = {Baltmannsweiler}, isbn = {978-3-8340-1518-1}, pages = {345 -- 358}, language = {de} } @incollection{Juengst, author = {J{\"u}ngst, Heike Elisabeth}, title = {Sachcomic{\"u}bersetzung und Laier{\"u}bersetzung}, series = {Comics - {\"U}bersetzungen und Adaptionen}, booktitle = {Comics - {\"U}bersetzungen und Adaptionen}, editor = {M{\"a}lzer, Nathalie}, publisher = {Frank \& Timme}, address = {Berlin}, isbn = {9783732998340}, pages = {301 -- 319}, language = {de} } @article{DiethelmKitzingPicardetal., author = {Diethelm, Kai and Kitzing, Konrad and Picard, Rainer and Siegmund, Stefan and Trostorff, Sascha and Waurick, Marcus}, title = {A Hilbert Space Approach to Fractional Differential Equations}, series = {Journal of Dynamics and Differential Equations}, volume = {34}, journal = {Journal of Dynamics and Differential Equations}, doi = {10.1007/s10884-020-09932-6}, pages = {481 -- 504}, abstract = {We study fractional differential equations of Riemann-Liouville and Caputo type in Hilbert spaces. Using exponentially weighted spaces of functions defined on R, we define fractional operators by means of a functional calculus using the Fourier transform. Main tools are extrapolation- and interpolation spaces. Main results are the existence and uniqueness of solutions and the causality of solution operators for non-linear fractional differential equations.}, language = {en} }