[{"date_created":"2020-08-11T13:32:40Z","type":"conference","keyword":["PHM 2019","crack propagation","forecasting","unevenly spaced time series","step ahead prediction","short time series"],"department":[{"_id":"151"}],"publication":"PHM Society European Conference","issue":"1","citation":{"ieee":"O. K. Aimiyekagbon, A. Bender, and W. Sextro, “Evaluation of time series forecasting approaches for the reliable crack length prediction of riveted aluminium plates given insufficient data,” in PHM Society European Conference, 2020, vol. 5, no. 1.","apa":"Aimiyekagbon, O. K., Bender, A., & Sextro, W. (2020). Evaluation of time series forecasting approaches for the reliable crack length prediction of riveted aluminium plates given insufficient data. PHM Society European Conference, 5(1).","mla":"Aimiyekagbon, Osarenren Kennedy, et al. “Evaluation of Time Series Forecasting Approaches for the Reliable Crack Length Prediction of Riveted Aluminium Plates given Insufficient Data.” PHM Society European Conference, vol. 5, no. 1, 2020.","bibtex":"@inproceedings{Aimiyekagbon_Bender_Sextro_2020, title={Evaluation of time series forecasting approaches for the reliable crack length prediction of riveted aluminium plates given insufficient data}, volume={5}, number={1}, booktitle={PHM Society European Conference}, author={Aimiyekagbon, Osarenren Kennedy and Bender, Amelie and Sextro, Walter}, year={2020} }","chicago":"Aimiyekagbon, Osarenren Kennedy, Amelie Bender, and Walter Sextro. “Evaluation of Time Series Forecasting Approaches for the Reliable Crack Length Prediction of Riveted Aluminium Plates given Insufficient Data.” In PHM Society European Conference, Vol. 5, 2020.","ama":"Aimiyekagbon OK, Bender A, Sextro W. Evaluation of time series forecasting approaches for the reliable crack length prediction of riveted aluminium plates given insufficient data. In: PHM Society European Conference. Vol 5. ; 2020.","short":"O.K. Aimiyekagbon, A. Bender, W. Sextro, in: PHM Society European Conference, 2020."},"quality_controlled":"1","abstract":[{"lang":"eng","text":"In all fields, the significance of a reliable and accurate predictive model is almost unquantifiable. With deep domain knowledge, models derived from first principles typically outperforms other models in terms of reliability and accuracy. When it may become a cumbersome or an unachievable task to build or validate such models of complex (non-linear) systems, machine learning techniques are employed to build predictive models. However, the accuracy of such techniques is not only dependent on the hyper-parameters of the chosen algorithm, but also on the amount and quality of data. This paper investigates the application of classical time series forecasting approaches for the reliable prognostics of technical systems, where black box machine learning techniques might not successfully be employed given insufficient amount of data and where first principles models are infeasible due to lack of domain specific data. Forecasting by analogy, forecasting by analytical function fitting, an exponential smoothing forecasting method and the long short-term memory (LSTM) are evaluated and compared against the ground truth data. As a case study, the methods are applied to predict future crack lengths of riveted aluminium plates under cyclic loading. The performance of the predictive models is evaluated based on error metrics leading to a proposal of when to apply which forecasting approach."}],"language":[{"iso":"eng"}],"_id":"17810","user_id":"9557","volume":5,"year":"2020","status":"public","title":"Evaluation of time series forecasting approaches for the reliable crack length prediction of riveted aluminium plates given insufficient data","author":[{"first_name":"Osarenren Kennedy","last_name":"Aimiyekagbon","full_name":"Aimiyekagbon, Osarenren Kennedy","id":"9557"},{"full_name":"Bender, Amelie","last_name":"Bender","first_name":"Amelie","id":"54290"},{"id":"21220","first_name":"Walter","last_name":"Sextro","full_name":"Sextro, Walter"}],"date_updated":"2023-09-22T09:13:16Z","intvolume":" 5"},{"quality_controlled":"1","project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"citation":{"apa":"Meyer, M., Kenter, T., & Plessl, C. (2020). Evaluating FPGA Accelerator Performance with a Parameterized OpenCL Adaptation of Selected Benchmarks of the HPCChallenge Benchmark Suite. 2020 IEEE/ACM International Workshop on Heterogeneous High-Performance Reconfigurable Computing (H2RC). https://doi.org/10.1109/h2rc51942.2020.00007","mla":"Meyer, Marius, et al. “Evaluating FPGA Accelerator Performance with a Parameterized OpenCL Adaptation of Selected Benchmarks of the HPCChallenge Benchmark Suite.” 2020 IEEE/ACM International Workshop on Heterogeneous High-Performance Reconfigurable Computing (H2RC), 2020, doi:10.1109/h2rc51942.2020.00007.","ieee":"M. Meyer, T. Kenter, and C. Plessl, “Evaluating FPGA Accelerator Performance with a Parameterized OpenCL Adaptation of Selected Benchmarks of the HPCChallenge Benchmark Suite,” 2020, doi: 10.1109/h2rc51942.2020.00007.","ama":"Meyer M, Kenter T, Plessl C. Evaluating FPGA Accelerator Performance with a Parameterized OpenCL Adaptation of Selected Benchmarks of the HPCChallenge Benchmark Suite. In: 2020 IEEE/ACM International Workshop on Heterogeneous High-Performance Reconfigurable Computing (H2RC). ; 2020. doi:10.1109/h2rc51942.2020.00007","short":"M. Meyer, T. Kenter, C. Plessl, in: 2020 IEEE/ACM International Workshop on Heterogeneous High-Performance Reconfigurable Computing (H2RC), 2020.","chicago":"Meyer, Marius, Tobias Kenter, and Christian Plessl. “Evaluating FPGA Accelerator Performance with a Parameterized OpenCL Adaptation of Selected Benchmarks of the HPCChallenge Benchmark Suite.” In 2020 IEEE/ACM International Workshop on Heterogeneous High-Performance Reconfigurable Computing (H2RC), 2020. https://doi.org/10.1109/h2rc51942.2020.00007.","bibtex":"@inproceedings{Meyer_Kenter_Plessl_2020, title={Evaluating FPGA Accelerator Performance with a Parameterized OpenCL Adaptation of Selected Benchmarks of the HPCChallenge Benchmark Suite}, DOI={10.1109/h2rc51942.2020.00007}, booktitle={2020 IEEE/ACM International Workshop on Heterogeneous High-performance Reconfigurable Computing (H2RC)}, author={Meyer, Marius and Kenter, Tobias and Plessl, Christian}, year={2020} }"},"user_id":"15278","_id":"21632","status":"public","keyword":["FPGA","OpenCL","High Level Synthesis","HPC benchmarking"],"type":"conference","department":[{"_id":"27"},{"_id":"518"}],"date_created":"2021-04-16T10:17:22Z","abstract":[{"text":"FPGAs have found increasing adoption in data center applications since a new generation of high-level tools have become available which noticeably reduce development time for FPGA accelerators and still provide high-quality results. There is, however, no high-level benchmark suite available, which specifically enables a comparison of FPGA architectures, programming tools, and libraries for HPC applications. To fill this gap, we have developed an OpenCL-based open-source implementation of the HPCC benchmark suite for Xilinx and Intel FPGAs. This benchmark can serve to analyze the current capabilities of FPGA devices, cards, and development tool flows, track progress over time, and point out specific difficulties for FPGA acceleration in the HPC domain. Additionally, the benchmark documents proven performance optimization patterns. We will continue optimizing and porting the benchmark for new generations of FPGAs and design tools and encourage active participation to create a valuable tool for the community. To fill this gap, we have developed an OpenCL-based open-source implementation of the HPCC benchmark suite for Xilinx and Intel FPGAs. This benchmark can serve to analyze the current capabilities of FPGA devices, cards, and development tool flows, track progress over time, and point out specific difficulties for FPGA acceleration in the HPC domain. Additionally, the benchmark documents proven performance optimization patterns. We will continue optimizing and porting the benchmark for new generations of FPGAs and design tools and encourage active participation to create a valuable tool for the community.","lang":"eng"}],"related_material":{"link":[{"description":"Official repository of the benchmark suite on GitHub","url":"https://github.com/pc2/HPCC_FPGA","relation":"supplementary_material"}]},"publication":"2020 IEEE/ACM International Workshop on Heterogeneous High-performance Reconfigurable Computing (H2RC)","doi":"10.1109/h2rc51942.2020.00007","main_file_link":[{"url":"https://ieeexplore.ieee.org/document/9306963"}],"language":[{"iso":"eng"}],"date_updated":"2023-09-26T11:42:53Z","publication_status":"published","year":"2020","title":"Evaluating FPGA Accelerator Performance with a Parameterized OpenCL Adaptation of Selected Benchmarks of the HPCChallenge Benchmark Suite","publication_identifier":{"isbn":["9781665415927"]},"author":[{"id":"40778","first_name":"Marius","last_name":"Meyer","full_name":"Meyer, Marius"},{"first_name":"Tobias","last_name":"Kenter","full_name":"Kenter, Tobias","id":"3145"},{"id":"16153","full_name":"Plessl, Christian","last_name":"Plessl","orcid":"0000-0001-5728-9982","first_name":"Christian"}]},{"oa":"1","external_id":{"arxiv":["1907.08497"]},"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"name":"Performance and Efficiency in HPC with Custom Computing","grant_number":"PL 595/2-1 / 320898746","_id":"32"}],"quality_controlled":"1","citation":{"chicago":"Rengaraj, Varadarajan, Michael Lass, Christian Plessl, and Thomas Kühne. “Accurate Sampling with Noisy Forces from Approximate Computing.” Computation 8, no. 2 (2020). https://doi.org/10.3390/computation8020039.","short":"V. Rengaraj, M. Lass, C. Plessl, T. Kühne, Computation 8 (2020).","ieee":"V. Rengaraj, M. Lass, C. Plessl, and T. Kühne, “Accurate Sampling with Noisy Forces from Approximate Computing,” Computation, vol. 8, no. 2, Art. no. 39, 2020, doi: 10.3390/computation8020039.","apa":"Rengaraj, V., Lass, M., Plessl, C., & Kühne, T. (2020). Accurate Sampling with Noisy Forces from Approximate Computing. Computation, 8(2), Article 39. https://doi.org/10.3390/computation8020039","bibtex":"@article{Rengaraj_Lass_Plessl_Kühne_2020, title={Accurate Sampling with Noisy Forces from Approximate Computing}, volume={8}, DOI={10.3390/computation8020039}, number={239}, journal={Computation}, publisher={MDPI}, author={Rengaraj, Varadarajan and Lass, Michael and Plessl, Christian and Kühne, Thomas}, year={2020} }","ama":"Rengaraj V, Lass M, Plessl C, Kühne T. Accurate Sampling with Noisy Forces from Approximate Computing. Computation. 2020;8(2). doi:10.3390/computation8020039","mla":"Rengaraj, Varadarajan, et al. “Accurate Sampling with Noisy Forces from Approximate Computing.” Computation, vol. 8, no. 2, 39, MDPI, 2020, doi:10.3390/computation8020039."},"volume":8,"user_id":"15278","publisher":"MDPI","_id":"12878","status":"public","department":[{"_id":"27"},{"_id":"518"},{"_id":"304"}],"type":"journal_article","date_created":"2019-07-23T12:03:07Z","abstract":[{"text":"In scientific computing, the acceleration of atomistic computer simulations by means of custom hardware is finding ever-growing application. A major limitation, however, is that the high efficiency in terms of performance and low power consumption entails the massive usage of low precision computing units. Here, based on the approximate computing paradigm, we present an algorithmic method to compensate for numerical inaccuracies due to low accuracy arithmetic operations rigorously, yet still obtaining exact expectation values using a properly modified Langevin-type equation.","lang":"eng"}],"publication":"Computation","issue":"2","doi":"10.3390/computation8020039","language":[{"iso":"eng"}],"article_number":"39","main_file_link":[{"open_access":"1","url":"https://www.mdpi.com/2079-3197/8/2/39/pdf"}],"intvolume":" 8","date_updated":"2023-09-26T11:43:52Z","author":[{"first_name":"Varadarajan","last_name":"Rengaraj","full_name":"Rengaraj, Varadarajan"},{"id":"24135","last_name":"Lass","orcid":"0000-0002-5708-7632","first_name":"Michael","full_name":"Lass, Michael"},{"id":"16153","full_name":"Plessl, Christian","last_name":"Plessl","orcid":"0000-0001-5728-9982","first_name":"Christian"},{"id":"49079","full_name":"Kühne, Thomas","last_name":"Kühne","first_name":"Thomas"}],"year":"2020","title":"Accurate Sampling with Noisy Forces from Approximate Computing"},{"status":"public","_id":"59686","publisher":"AIP Publishing","volume":127,"user_id":"15911","citation":{"ieee":"Y. Shi et al., “Time-resolved photoluminescence characterization of InGaAs/GaAs nano-ridges monolithically grown on 300 mm Si substrates,” Journal of Applied Physics, vol. 127, no. 10, 2020, doi: 10.1063/1.5139636.","apa":"Shi, Y., Kreuzer, L. C., Gerhardt, N. C., Pantouvaki, M., Van Campenhout, J., Baryshnikova, M., Langer, R., Van Thourhout, D., & Kunert, B. (2020). Time-resolved photoluminescence characterization of InGaAs/GaAs nano-ridges monolithically grown on 300 mm Si substrates. Journal of Applied Physics, 127(10). https://doi.org/10.1063/1.5139636","chicago":"Shi, Yuting, Lisa C. Kreuzer, Nils Christopher Gerhardt, Marianna Pantouvaki, Joris Van Campenhout, Marina Baryshnikova, Robert Langer, Dries Van Thourhout, and Bernardette Kunert. “Time-Resolved Photoluminescence Characterization of InGaAs/GaAs Nano-Ridges Monolithically Grown on 300 Mm Si Substrates.” Journal of Applied Physics 127, no. 10 (2020). https://doi.org/10.1063/1.5139636.","short":"Y. Shi, L.C. Kreuzer, N.C. Gerhardt, M. Pantouvaki, J. Van Campenhout, M. Baryshnikova, R. Langer, D. Van Thourhout, B. Kunert, Journal of Applied Physics 127 (2020).","mla":"Shi, Yuting, et al. “Time-Resolved Photoluminescence Characterization of InGaAs/GaAs Nano-Ridges Monolithically Grown on 300 Mm Si Substrates.” Journal of Applied Physics, vol. 127, no. 10, AIP Publishing, 2020, doi:10.1063/1.5139636.","bibtex":"@article{Shi_Kreuzer_Gerhardt_Pantouvaki_Van Campenhout_Baryshnikova_Langer_Van Thourhout_Kunert_2020, title={Time-resolved photoluminescence characterization of InGaAs/GaAs nano-ridges monolithically grown on 300 mm Si substrates}, volume={127}, DOI={10.1063/1.5139636}, number={10}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Shi, Yuting and Kreuzer, Lisa C. and Gerhardt, Nils Christopher and Pantouvaki, Marianna and Van Campenhout, Joris and Baryshnikova, Marina and Langer, Robert and Van Thourhout, Dries and Kunert, Bernardette}, year={2020} }","ama":"Shi Y, Kreuzer LC, Gerhardt NC, et al. Time-resolved photoluminescence characterization of InGaAs/GaAs nano-ridges monolithically grown on 300 mm Si substrates. Journal of Applied Physics. 2020;127(10). doi:10.1063/1.5139636"},"quality_controlled":"1","author":[{"last_name":"Shi","first_name":"Yuting","full_name":"Shi, Yuting"},{"full_name":"Kreuzer, Lisa C.","last_name":"Kreuzer","first_name":"Lisa C."},{"full_name":"Gerhardt, Nils Christopher","last_name":"Gerhardt","first_name":"Nils Christopher","orcid":"0009-0002-5538-231X","id":"115298"},{"full_name":"Pantouvaki, Marianna","first_name":"Marianna","last_name":"Pantouvaki"},{"full_name":"Van Campenhout, Joris","first_name":"Joris","last_name":"Van Campenhout"},{"full_name":"Baryshnikova, Marina","last_name":"Baryshnikova","first_name":"Marina"},{"full_name":"Langer, Robert","first_name":"Robert","last_name":"Langer"},{"full_name":"Van Thourhout, Dries","last_name":"Van Thourhout","first_name":"Dries"},{"last_name":"Kunert","first_name":"Bernardette","full_name":"Kunert, Bernardette"}],"publication_identifier":{"issn":["0021-8979","1089-7550"]},"year":"2020","title":"Time-resolved photoluminescence characterization of InGaAs/GaAs nano-ridges monolithically grown on 300 mm Si substrates","intvolume":" 127","publication_status":"published","date_updated":"2025-04-25T07:28:42Z","language":[{"iso":"eng"}],"doi":"10.1063/1.5139636","publication":"Journal of Applied Physics","issue":"10","abstract":[{"text":"The monolithic growth of III–V materials directly on Si substrates provides a promising integration approach for passive and active silicon photonic integrated circuits but still faces great challenges in crystal quality due to misfit defect formation. Nano-ridge engineering is a new approach that enables the integration of III–V based devices on trench-patterned Si substrates with very high crystal quality. Using selective area growth, the III–V material is deposited into narrow trenches to reduce the dislocation defect density by aspect ratio trapping. The growth is continued out of the trench pattern and a box-shaped III–V nano-ridge is engineered by adjusting the growth parameters. A flat (001) GaAs nano-ridge surface enables the epitaxial integration of a common InGaAs/GaAs multi-quantum-well (MQW) structure as an optical gain medium to build a laser diode. In this study, a clear correlation is found between the photoluminescence (PL) lifetime, extracted from time-resolved photoluminescence (TRPL) measurements, with the InGaAs/GaAs nano-ridge size and defect density, which are both predefined by the nano-ridge related pattern trench width. Through the addition of an InGaP passivation layer, a MQW PL lifetime of up to 800 ps and 1000 ps is measured when pumped at 900 nm (only QWs were excited) and 800 nm (QWs + barrier excited), respectively. The addition of a bottom carrier blocking layer further increases this lifetime to ∼2.5ns (pumped at 800 nm), which clearly demonstrates the high crystal quality of the nano-ridge material. These TRPL measurements not only deliver quick and valuable feedback about the III–V material quality but also provide an important understanding for the heterostructure design and carrier confinement of the nano-ridge laser diode.","lang":"eng"}],"date_created":"2025-04-25T07:18:24Z","department":[{"_id":"977"}],"type":"journal_article"},{"author":[{"id":"102981","first_name":"Anna Viktoria Katrin","orcid":"0000-0002-9969-0608","last_name":"Plaksin","full_name":"Plaksin, Anna Viktoria Katrin"}],"title":"Do visual features matter? Studies in phylogenetic analysis of mensural music","year":"2020","date_updated":"2025-05-13T13:41:02Z","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://works.hcommons.org/records/ve025-nac95"}],"doi":"10.17613/PZY7-EK18","publication":"Music Encoding Conference 2020","extern":"1","date_created":"2025-05-13T13:11:54Z","department":[{"_id":"872"}],"type":"conference","conference":{"end_date":"2020-05-29","name":"Music Encoding Conference 2020","start_date":"2020-05-26","location":"online"},"status":"public","_id":"59885","publisher":"Humanities Commons","editor":[{"last_name":"de Luca","first_name":"Elsa","full_name":"de Luca, Elsa"},{"full_name":"Flanders, Julia","last_name":"Flanders","first_name":"Julia"}],"user_id":"102981","citation":{"ama":"Plaksin AVK. Do visual features matter? Studies in phylogenetic analysis of mensural music. In: de Luca E, Flanders J, eds. Music Encoding Conference 2020. Humanities Commons; 2020. doi:10.17613/PZY7-EK18","bibtex":"@inproceedings{Plaksin_2020, title={Do visual features matter? Studies in phylogenetic analysis of mensural music}, DOI={10.17613/PZY7-EK18}, booktitle={Music Encoding Conference 2020}, publisher={Humanities Commons}, author={Plaksin, Anna Viktoria Katrin}, editor={de Luca, Elsa and Flanders, Julia}, year={2020} }","mla":"Plaksin, Anna Viktoria Katrin. “Do Visual Features Matter? Studies in Phylogenetic Analysis of Mensural Music.” Music Encoding Conference 2020, edited by Elsa de Luca and Julia Flanders, Humanities Commons, 2020, doi:10.17613/PZY7-EK18.","short":"A.V.K. Plaksin, in: E. de Luca, J. Flanders (Eds.), Music Encoding Conference 2020, Humanities Commons, 2020.","chicago":"Plaksin, Anna Viktoria Katrin. “Do Visual Features Matter? Studies in Phylogenetic Analysis of Mensural Music.” In Music Encoding Conference 2020, edited by Elsa de Luca and Julia Flanders. Humanities Commons, 2020. https://doi.org/10.17613/PZY7-EK18.","apa":"Plaksin, A. V. K. (2020). Do visual features matter? Studies in phylogenetic analysis of mensural music. In E. de Luca & J. Flanders (Eds.), Music Encoding Conference 2020. Humanities Commons. https://doi.org/10.17613/PZY7-EK18","ieee":"A. V. K. Plaksin, “Do visual features matter? Studies in phylogenetic analysis of mensural music,” in Music Encoding Conference 2020, online, 2020, doi: 10.17613/PZY7-EK18."},"quality_controlled":"1","oa":"1"},{"quality_controlled":"1","citation":{"ama":"Schnitzler L, Neutsch K, Schellenberg F, Hofmann MR, Gerhardt NC. Confocal laser scanning holographic microscopy of buried structures. Applied Optics. 2020;60(4). doi:10.1364/ao.403687","bibtex":"@article{Schnitzler_Neutsch_Schellenberg_Hofmann_Gerhardt_2020, title={Confocal laser scanning holographic microscopy of buried structures}, volume={60}, DOI={10.1364/ao.403687}, number={4A8}, journal={Applied Optics}, publisher={Optica Publishing Group}, author={Schnitzler, Lena and Neutsch, Krisztian and Schellenberg, Falk and Hofmann, Martin R. and Gerhardt, Nils Christopher}, year={2020} }","mla":"Schnitzler, Lena, et al. “Confocal Laser Scanning Holographic Microscopy of Buried Structures.” Applied Optics, vol. 60, no. 4, A8, Optica Publishing Group, 2020, doi:10.1364/ao.403687.","short":"L. Schnitzler, K. Neutsch, F. Schellenberg, M.R. Hofmann, N.C. Gerhardt, Applied Optics 60 (2020).","chicago":"Schnitzler, Lena, Krisztian Neutsch, Falk Schellenberg, Martin R. Hofmann, and Nils Christopher Gerhardt. “Confocal Laser Scanning Holographic Microscopy of Buried Structures.” Applied Optics 60, no. 4 (2020). https://doi.org/10.1364/ao.403687.","apa":"Schnitzler, L., Neutsch, K., Schellenberg, F., Hofmann, M. R., & Gerhardt, N. C. (2020). Confocal laser scanning holographic microscopy of buried structures. Applied Optics, 60(4), Article A8. https://doi.org/10.1364/ao.403687","ieee":"L. Schnitzler, K. Neutsch, F. Schellenberg, M. R. Hofmann, and N. C. Gerhardt, “Confocal laser scanning holographic microscopy of buried structures,” Applied Optics, vol. 60, no. 4, Art. no. A8, 2020, doi: 10.1364/ao.403687."},"volume":60,"user_id":"15911","publisher":"Optica Publishing Group","_id":"59684","status":"public","department":[{"_id":"977"}],"type":"journal_article","date_created":"2025-04-25T07:04:55Z","abstract":[{"text":"In this paper, we present a confocal laser scanning holographic microscope for the investigation of buried structures. The multimodal system combines high diffraction limited resolution and high signal-to-noise-ratio with the ability of phase acquisition. The amplitude and phase imaging capabilities of the system are shown on a test target. For the investigation of buried integrated semiconductor structures, we expand our system with an optical beam induced current modality that provides additional structure-sensitive contrast. We demonstrate the performance of the multimodal system by imaging the buried structures of a microcontroller through the silicon backside of its housing in reflection geometry.","lang":"eng"}],"extern":"1","publication":"Applied Optics","issue":"4","doi":"10.1364/ao.403687","language":[{"iso":"eng"}],"article_number":"A8","intvolume":" 60","article_type":"original","date_updated":"2026-02-19T14:23:31Z","publication_status":"published","publication_identifier":{"issn":["1559-128X","2155-3165"]},"author":[{"full_name":"Schnitzler, Lena","first_name":"Lena","last_name":"Schnitzler"},{"last_name":"Neutsch","first_name":"Krisztian","full_name":"Neutsch, Krisztian"},{"full_name":"Schellenberg, Falk","first_name":"Falk","last_name":"Schellenberg"},{"full_name":"Hofmann, Martin R.","first_name":"Martin R.","last_name":"Hofmann"},{"id":"115298","first_name":"Nils Christopher","last_name":"Gerhardt","orcid":"0009-0002-5538-231X","full_name":"Gerhardt, Nils Christopher"}],"title":"Confocal laser scanning holographic microscopy of buried structures","year":"2020"},{"status":"public","page":"280-285","_id":"19976","user_id":"53912","editor":[{"last_name":"Kuball","first_name":"Clara-Maria","full_name":"Kuball, Clara-Maria"},{"id":"38131","last_name":"Uhe","first_name":"Benedikt","full_name":"Uhe, Benedikt"},{"full_name":"Meschut, Gerson","last_name":"Meschut","first_name":"Gerson","orcid":"0000-0002-2763-1246","id":"32056"},{"full_name":"Merklein, Marion","last_name":"Merklein","first_name":"Marion"}],"volume":50,"citation":{"ieee":"C.-M. Kuball, B. Uhe, G. Meschut, and M. Merklein, Eds., Process design for the forming of semi-tubular self-piercing rivets made of high nitrogen steel, vol. 50. 2020, pp. 280–285.","apa":"Kuball, C.-M., Uhe, B., Meschut, G., & Merklein, M. (Eds.). (2020). Process design for the forming of semi-tubular self-piercing rivets made of high nitrogen steel (Vol. 50, pp. 280–285). https://doi.org/10.1016/j.promfg.2020.08.052","chicago":"Kuball, Clara-Maria, Benedikt Uhe, Gerson Meschut, and Marion Merklein, eds. Process Design for the Forming of Semi-Tubular Self-Piercing Rivets Made of High Nitrogen Steel. Vol. 50. Procedia Manufacturing, 2020. https://doi.org/10.1016/j.promfg.2020.08.052.","short":"C.-M. Kuball, B. Uhe, G. Meschut, M. Merklein, eds., Process Design for the Forming of Semi-Tubular Self-Piercing Rivets Made of High Nitrogen Steel, 2020.","mla":"Kuball, Clara-Maria, et al., editors. Process Design for the Forming of Semi-Tubular Self-Piercing Rivets Made of High Nitrogen Steel. 2020, pp. 280–85, doi:10.1016/j.promfg.2020.08.052.","bibtex":"@book{Kuball_Uhe_Meschut_Merklein_2020, series={Procedia Manufacturing}, title={Process design for the forming of semi-tubular self-piercing rivets made of high nitrogen steel}, volume={50}, DOI={10.1016/j.promfg.2020.08.052}, year={2020}, pages={280–285}, collection={Procedia Manufacturing} }","ama":"Kuball C-M, Uhe B, Meschut G, Merklein M, eds. Process Design for the Forming of Semi-Tubular Self-Piercing Rivets Made of High Nitrogen Steel. Vol 50.; 2020:280-285. doi:10.1016/j.promfg.2020.08.052"},"quality_controlled":"1","year":"2020","title":"Process design for the forming of semi-tubular self-piercing rivets made of high nitrogen steel","date_updated":"2026-02-27T10:43:48Z","publication_status":"published","intvolume":" 50","language":[{"iso":"eng"}],"series_title":"Procedia Manufacturing","doi":"10.1016/j.promfg.2020.08.052","abstract":[{"lang":"eng","text":"The aim to reduce pollutant emission has led to a trend towards lightweight construction in car body development during the last years. As a consequence of the resulting need for multi-material design, mechanical joining technologies become increasingly important. Mechanical joining allows for the combination of dissimilar materials, while thermic joining techniques reach their limits. Self-piercing riveting enables the joining of dissimilar materials by using semi-tubular rivets as mechanical fasteners. The rivet production, however, is costly and time-consuming, as the rivets generally have to be hardened, tempered and coated after forming, in order to achieve an adequate strength and corrosion resistance. A promising approach to improve the efficiency of the rivet manufacturing is the use of high-strength high nitrogen steel as rivet material because these additional process steps would not be necessary anymore. As a result of the comparatively high nitrogen content, such steels have various beneficial properties like higher strength, good ductility and improved corrosion resistance. By cold bulk forming of high nitrogen steels high-strength parts can be manufactured due to the strengthening which is caused by the high strain hardening. However, high tool loads thereby have to be expected and are a major challenge during the production process. Consequently, there is a need for appropriate forming strategies. This paper presents key aspects concerning the process design for the manufacturing of semi-tubular self-piercing rivets made of high-strength steel. The aim is to produce the rivets in several forming stages without intermediate heat treatment between the single stages. Due to the high strain hardening of the material, a two stage forming concept will be investigated. Cup-backward extrusion is chosen as the first process step in order to form the rivet shank without forming the rivet foot. Thus, the strain hardening effects in the area of the rivet foot are minimized and the tool loads during the following process step can be reduced. During the second and final forming stage the detailed geometry of the rivet foot and the rivet head is formed. In this context, the effect of different variations, for example concerning the final geometry of the rivet foot, on the tool load is investigated using multistage numerical analysis. Furthermore, the influence of the process temperature on occurring stresses is analysed. Based on the results of the investigations, an adequate forming strategy and a tool concept for the manufacturing of semi-tubular self-piercing rivets made of high-strength steel are presented."}],"date_created":"2020-10-12T08:30:08Z","keyword":["high nitrogen steel","self-piercing riveting","joining by forming","bulk forming","tool design"],"type":"conference_editor","department":[{"_id":"157"}]},{"intvolume":" 14","article_type":"original","date_updated":"2026-02-27T10:41:55Z","publication_status":"published","author":[{"id":"38131","full_name":"Uhe, Benedikt","first_name":"Benedikt","last_name":"Uhe"},{"first_name":"Clara-Maria","last_name":"Kuball","full_name":"Kuball, Clara-Maria"},{"last_name":"Merklein","first_name":"Marion","full_name":"Merklein, Marion"},{"full_name":"Meschut, Gerson","orcid":"0000-0002-2763-1246","last_name":"Meschut","first_name":"Gerson","id":"32056"}],"title":"Improvement of a rivet geometry for the self-piercing riveting of high-strength steel and multi-material joints","year":"2020","doi":"10.1007/s11740-020-00973-w","language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"As a result of lightweight design, increased use is being made of high-strength steel and aluminium in car bodies. Self-piercing riveting is an established technique for joining these materials. The dissimilar properties of the two materials have led to a number of different rivet geometries in the past. Each rivet geometry fulfils the requirements of the materials within a limited range. In the present investigation, an improved rivet geometry is developed, which permits the reliable joining of two material combinations that could only be joined by two different rivet geometries up until now. Material combination 1 consists of high-strength steel on both sides, while material combination 2 comprises aluminium on the punch side and high-strength steel on the die side. The material flow and the stress and strain conditions prevailing during the joining process are analysed by means of numerical simulation. The rivet geometry is then improved step-by-step on the basis of this analysis. Finally, the improved rivet geometry is manufactured and the findings of the investigation are verified in experimental joining tests."}],"publication":"Production Engineering","department":[{"_id":"157"}],"type":"journal_article","keyword":["Self-piercing riveting","Joining technology","Rivet geometry","Multi-material design","High-strength steel","Aluminium"],"date_created":"2020-10-12T08:14:13Z","status":"public","volume":14,"user_id":"53912","_id":"19973","page":"417-423","quality_controlled":"1","citation":{"mla":"Uhe, Benedikt, et al. “Improvement of a Rivet Geometry for the Self-Piercing Riveting of High-Strength Steel and Multi-Material Joints.” Production Engineering, vol. 14, 2020, pp. 417–23, doi:10.1007/s11740-020-00973-w.","ama":"Uhe B, Kuball C-M, Merklein M, Meschut G. Improvement of a rivet geometry for the self-piercing riveting of high-strength steel and multi-material joints. Production Engineering. 2020;14:417-423. doi:10.1007/s11740-020-00973-w","bibtex":"@article{Uhe_Kuball_Merklein_Meschut_2020, title={Improvement of a rivet geometry for the self-piercing riveting of high-strength steel and multi-material joints}, volume={14}, DOI={10.1007/s11740-020-00973-w}, journal={Production Engineering}, author={Uhe, Benedikt and Kuball, Clara-Maria and Merklein, Marion and Meschut, Gerson}, year={2020}, pages={417–423} }","apa":"Uhe, B., Kuball, C.-M., Merklein, M., & Meschut, G. (2020). Improvement of a rivet geometry for the self-piercing riveting of high-strength steel and multi-material joints. Production Engineering, 14, 417–423. https://doi.org/10.1007/s11740-020-00973-w","ieee":"B. Uhe, C.-M. Kuball, M. Merklein, and G. Meschut, “Improvement of a rivet geometry for the self-piercing riveting of high-strength steel and multi-material joints,” Production Engineering, vol. 14, pp. 417–423, 2020, doi: 10.1007/s11740-020-00973-w.","short":"B. Uhe, C.-M. Kuball, M. Merklein, G. Meschut, Production Engineering 14 (2020) 417–423.","chicago":"Uhe, Benedikt, Clara-Maria Kuball, Marion Merklein, and Gerson Meschut. “Improvement of a Rivet Geometry for the Self-Piercing Riveting of High-Strength Steel and Multi-Material Joints.” Production Engineering 14 (2020): 417–23. https://doi.org/10.1007/s11740-020-00973-w."}},{"doi":"10.1016/j.jajp.2020.100023","series_title":"Journal of Advanced Joining Processes","language":[{"iso":"eng"}],"article_number":"100023","intvolume":" 1","date_updated":"2026-02-27T10:45:08Z","publication_status":"published","year":"2020","title":"Influence of the process temperature on the forming behaviour and the friction during bulk forming of high nitrogen steel","department":[{"_id":"157"}],"keyword":["High nitrogen steel","Self-piercing riveting","Joining by forming","Bulk forming","Strain hardening"],"type":"conference_editor","date_created":"2020-10-12T08:23:27Z","abstract":[{"lang":"eng","text":"Due to the trend towards lightweight design in car body development mechanical joining technologies become increasingly important. These techniques allow for the joining of dissimilar materials and thus enable multi-material design, while thermic joining methods reach their limits. Semi-tubular self-piercing riveting is an important mechanical joining technology. The rivet production, however, is costly and time-consuming, as the process consists of several process steps including the heat treatment and coating of the rivets in order to achieve an adequate strength and corrosion resistance. The use of high nitrogen steel as rivet material leads to the possibility of reducing process steps and hence increasing the efficiency of the process. However, the high tool loads being expected due to the high strain hardening of the material are a major challenge during the rivet production. Thus, there is a need for appropriate forming strategies, such as the manufacturing of the rivets at elevated temperatures. Prior investigations led to the conclusion that forming already at 200 °C results in a distinct reduction of the yield strength. To create a deeper understanding of the forming behaviour of high nitrogen steel at elevated temperatures, compression tests were conducted in a temperature range between room temperature and 200 °C. The determined true stress – true strain curves are the basis for the further process and tool design of the rivet production. Another key factor for the rivet manufacturing at elevated temperatures is the influence of the process temperature on the tribological conditions. For this reason, ring compression tests at room temperature and 200 °C are carried out. The friction factors are determined on the basis of calibration curves resulting from the numerical analysis of the ring compression process. The investigations indicate that the friction factor at 200 °C is significantly higher compared to room temperature. This essential fact has to be taken into account for the process and tool design for the rivet production using high nitrogen steel."}],"editor":[{"first_name":"Clara-Maria","last_name":"Kuball","full_name":"Kuball, Clara-Maria"},{"full_name":"Jung, R","first_name":"R","last_name":"Jung"},{"last_name":"Uhe","first_name":"Benedikt","full_name":"Uhe, Benedikt","id":"38131"},{"full_name":"Meschut, Gerson","last_name":"Meschut","first_name":"Gerson","orcid":"0000-0002-2763-1246","id":"32056"},{"first_name":"Marion","last_name":"Merklein","full_name":"Merklein, Marion"}],"volume":1,"user_id":"53912","_id":"19974","status":"public","quality_controlled":"1","citation":{"ama":"Kuball C-M, Jung R, Uhe B, Meschut G, Merklein M, eds. Influence of the Process Temperature on the Forming Behaviour and the Friction during Bulk Forming of High Nitrogen Steel. Vol 1.; 2020. doi:10.1016/j.jajp.2020.100023","bibtex":"@book{Kuball_Jung_Uhe_Meschut_Merklein_2020, series={Journal of Advanced Joining Processes}, title={Influence of the process temperature on the forming behaviour and the friction during bulk forming of high nitrogen steel}, volume={1}, DOI={10.1016/j.jajp.2020.100023}, number={100023}, year={2020}, collection={Journal of Advanced Joining Processes} }","mla":"Kuball, Clara-Maria, et al., editors. Influence of the Process Temperature on the Forming Behaviour and the Friction during Bulk Forming of High Nitrogen Steel. 100023, 2020, doi:10.1016/j.jajp.2020.100023.","short":"C.-M. Kuball, R. Jung, B. Uhe, G. Meschut, M. Merklein, eds., Influence of the Process Temperature on the Forming Behaviour and the Friction during Bulk Forming of High Nitrogen Steel, 2020.","chicago":"Kuball, Clara-Maria, R Jung, Benedikt Uhe, Gerson Meschut, and Marion Merklein, eds. Influence of the Process Temperature on the Forming Behaviour and the Friction during Bulk Forming of High Nitrogen Steel. Vol. 1. Journal of Advanced Joining Processes, 2020. https://doi.org/10.1016/j.jajp.2020.100023.","apa":"Kuball, C.-M., Jung, R., Uhe, B., Meschut, G., & Merklein, M. (Eds.). (2020). Influence of the process temperature on the forming behaviour and the friction during bulk forming of high nitrogen steel (No. 100023; Vol. 1). https://doi.org/10.1016/j.jajp.2020.100023","ieee":"C.-M. Kuball, R. Jung, B. Uhe, G. Meschut, and M. Merklein, Eds., Influence of the process temperature on the forming behaviour and the friction during bulk forming of high nitrogen steel, vol. 1. 2020."}},{"doi":"10.1007/s40573-020-00115-w","language":[{"iso":"ger"}],"publication_status":"published","date_updated":"2025-12-03T09:06:43Z","intvolume":" 26","title":"Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests","year":"2020","publication_identifier":{"issn":["0949-1147","2197-988X"]},"author":[{"full_name":"Schröder, Jan","first_name":"Jan","last_name":"Schröder"},{"id":"429","first_name":"Josef","orcid":"0000-0003-2927-2619","last_name":"Riese","full_name":"Riese, Josef"},{"id":"4245","first_name":"Christoph","last_name":"Vogelsang","orcid":"0000-0002-5804-1855","full_name":"Vogelsang, Christoph"},{"full_name":"Borowski, Andreas","first_name":"Andreas","last_name":"Borowski"},{"first_name":"David","last_name":"Buschhüter","full_name":"Buschhüter, David"},{"first_name":"Patrick","last_name":"Enkrott","full_name":"Enkrott, Patrick"},{"last_name":"Kempin","first_name":"Maren","full_name":"Kempin, Maren"},{"full_name":"Kulgemeyer, Christoph","last_name":"Kulgemeyer","first_name":"Christoph","id":"84533"},{"full_name":"Reinhold, Peter","first_name":"Peter","last_name":"Reinhold","id":"416"},{"first_name":"Horst","last_name":"Schecker","full_name":"Schecker, Horst"}],"type":"journal_article","department":[{"_id":"299"},{"_id":"33"}],"date_created":"2023-05-20T10:19:53Z","abstract":[{"lang":"eng","text":"ZusammenfassungDie Unterrichtsplanung stellt eine zentrale berufliche Anforderung an (Physik‑)Lehrkräfte dar. Bereits im Lehramtsstudium sollen grundlegende Fähigkeiten zur Unterrichtsplanung erworben und im Rahmen von schulpraktischen Phasen erprobt bzw. erweitert werden. Unklar ist jedoch, inwieweit das professionelle Wissen, das Lehramtsstudierende in ihren fachlichen, fachdidaktischen und erziehungswissenschaftlichen Studienteilen erwerben, tatsächlich bei der Planung von Fachunterricht genutzt wird. Ebenso gibt es nur punktuelle Erkenntnisse über die Entwicklung der Fähigkeit zur Unterrichtsplanung im Lehramtsstudium. Um diese Fragen zu klären, sind Messverfahren erforderlich, die die Fähigkeiten zur Unterrichtsplanung valide erfassen können und die gleichzeitig ökonomisch auswertbar sind, um Fallzahlen realisieren zu können, die auch kleine Effekte auflösen. Bisherige Ansätze, die reale Handlungsproben der Unterrichtsplanung (z. B. schriftliche Unterrichtsentwürfe) untersuchen, stehen vor der methodischen Herausforderung, dass die Generierung eines Fähigkeitsmaßes höchst anspruchsvoll ist, da reale Planungen individuell sehr unterschiedlich angelegt sind und vielen Randbedingungen unterliegen, die statistisch kaum kontrollierbar sind. In diesem Beitrag wird daher ein sogenannter Performanztest zur Erfassung der Fähigkeit zur Unterrichtsplanung vorgestellt und diskutiert. Ein Performanztest ist ein Verfahren, in dem in einem realitätsnahen Setting Handlungen unter standardisierten Rahmenbedingungen simuliert werden. Neben der theoriegeleiteten Entwicklung des Instruments und Vorstudien zur Sammlung von Validitätsargumenten werden auch erste Ergebnisse dargestellt, die aus Erhebungen vor und nach einem Praxissemester an vier Universitäten in drei Bundesländern resultieren (N = 174 Unterrichtsplanungen). Dabei stellt sich das Testverfahren als ausreichend sensitiv heraus, um für N = 68 Testpersonen (ca. 20 % Dropout) erwartungstreu eine signifikante Zunahme des Testscores während des Praxissemesters, welches als Lerngelegenheit angenommen werden kann, zu messen."}],"issue":"1","publication":"Zeitschrift für Didaktik der Naturwissenschaften","user_id":"4245","volume":26,"page":"103-122","publisher":"Springer Science and Business Media LLC","_id":"45178","status":"public","quality_controlled":"1","citation":{"ieee":"J. Schröder et al., “Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests,” Zeitschrift für Didaktik der Naturwissenschaften, vol. 26, no. 1, pp. 103–122, 2020, doi: 10.1007/s40573-020-00115-w.","apa":"Schröder, J., Riese, J., Vogelsang, C., Borowski, A., Buschhüter, D., Enkrott, P., Kempin, M., Kulgemeyer, C., Reinhold, P., & Schecker, H. (2020). Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests. Zeitschrift für Didaktik der Naturwissenschaften, 26(1), 103–122. https://doi.org/10.1007/s40573-020-00115-w","chicago":"Schröder, Jan, Josef Riese, Christoph Vogelsang, Andreas Borowski, David Buschhüter, Patrick Enkrott, Maren Kempin, Christoph Kulgemeyer, Peter Reinhold, and Horst Schecker. “Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests.” Zeitschrift für Didaktik der Naturwissenschaften 26, no. 1 (2020): 103–22. https://doi.org/10.1007/s40573-020-00115-w.","short":"J. Schröder, J. Riese, C. Vogelsang, A. Borowski, D. Buschhüter, P. Enkrott, M. Kempin, C. Kulgemeyer, P. Reinhold, H. Schecker, Zeitschrift für Didaktik der Naturwissenschaften 26 (2020) 103–122.","mla":"Schröder, Jan, et al. “Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests.” Zeitschrift für Didaktik der Naturwissenschaften, vol. 26, no. 1, Springer Science and Business Media LLC, 2020, pp. 103–22, doi:10.1007/s40573-020-00115-w.","bibtex":"@article{Schröder_Riese_Vogelsang_Borowski_Buschhüter_Enkrott_Kempin_Kulgemeyer_Reinhold_Schecker_2020, title={Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests}, volume={26}, DOI={10.1007/s40573-020-00115-w}, number={1}, journal={Zeitschrift für Didaktik der Naturwissenschaften}, publisher={Springer Science and Business Media LLC}, author={Schröder, Jan and Riese, Josef and Vogelsang, Christoph and Borowski, Andreas and Buschhüter, David and Enkrott, Patrick and Kempin, Maren and Kulgemeyer, Christoph and Reinhold, Peter and Schecker, Horst}, year={2020}, pages={103–122} }","ama":"Schröder J, Riese J, Vogelsang C, et al. Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests. Zeitschrift für Didaktik der Naturwissenschaften. 2020;26(1):103-122. doi:10.1007/s40573-020-00115-w"}},{"date_updated":"2025-12-03T09:07:47Z","publication_status":"published","publication_identifier":{"issn":["0949-1147","2197-988X"]},"author":[{"last_name":"Schröder","first_name":"Jan","full_name":"Schröder, Jan"},{"last_name":"Riese","first_name":"Josef","full_name":"Riese, Josef"},{"id":"4245","full_name":"Vogelsang, Christoph","first_name":"Christoph","orcid":"0000-0002-5804-1855","last_name":"Vogelsang"},{"full_name":"Borowski, Andreas","last_name":"Borowski","first_name":"Andreas"},{"full_name":"Buschhüter, David","first_name":"David","last_name":"Buschhüter"},{"last_name":"Enkrott","first_name":"Patrick","full_name":"Enkrott, Patrick"},{"last_name":"Kempin","first_name":"Maren","full_name":"Kempin, Maren"},{"last_name":"Kulgemeyer","first_name":"Christoph","full_name":"Kulgemeyer, Christoph"},{"first_name":"Peter","last_name":"Reinhold","full_name":"Reinhold, Peter"},{"full_name":"Schecker, Horst","last_name":"Schecker","first_name":"Horst"}],"status":"public","title":"Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests","year":"2020","doi":"10.1007/s40573-020-00115-w","user_id":"4245","_id":"23742","language":[{"iso":"ger"}],"page":"103-122","quality_controlled":"1","abstract":[{"text":"ZusammenfassungDie Unterrichtsplanung stellt eine zentrale berufliche Anforderung an (Physik‑)Lehrkräfte dar. Bereits im Lehramtsstudium sollen grundlegende Fähigkeiten zur Unterrichtsplanung erworben und im Rahmen von schulpraktischen Phasen erprobt bzw. erweitert werden. Unklar ist jedoch, inwieweit das professionelle Wissen, das Lehramtsstudierende in ihren fachlichen, fachdidaktischen und erziehungswissenschaftlichen Studienteilen erwerben, tatsächlich bei der Planung von Fachunterricht genutzt wird. Ebenso gibt es nur punktuelle Erkenntnisse über die Entwicklung der Fähigkeit zur Unterrichtsplanung im Lehramtsstudium. Um diese Fragen zu klären, sind Messverfahren erforderlich, die die Fähigkeiten zur Unterrichtsplanung valide erfassen können und die gleichzeitig ökonomisch auswertbar sind, um Fallzahlen realisieren zu können, die auch kleine Effekte auflösen. Bisherige Ansätze, die reale Handlungsproben der Unterrichtsplanung (z. B. schriftliche Unterrichtsentwürfe) untersuchen, stehen vor der methodischen Herausforderung, dass die Generierung eines Fähigkeitsmaßes höchst anspruchsvoll ist, da reale Planungen individuell sehr unterschiedlich angelegt sind und vielen Randbedingungen unterliegen, die statistisch kaum kontrollierbar sind. In diesem Beitrag wird daher ein sogenannter Performanztest zur Erfassung der Fähigkeit zur Unterrichtsplanung vorgestellt und diskutiert. Ein Performanztest ist ein Verfahren, in dem in einem realitätsnahen Setting Handlungen unter standardisierten Rahmenbedingungen simuliert werden. Neben der theoriegeleiteten Entwicklung des Instruments und Vorstudien zur Sammlung von Validitätsargumenten werden auch erste Ergebnisse dargestellt, die aus Erhebungen vor und nach einem Praxissemester an vier Universitäten in drei Bundesländern resultieren (N = 174 Unterrichtsplanungen). Dabei stellt sich das Testverfahren als ausreichend sensitiv heraus, um für N = 68 Testpersonen (ca. 20 % Dropout) erwartungstreu eine signifikante Zunahme des Testscores während des Praxissemesters, welches als Lerngelegenheit angenommen werden kann, zu messen.","lang":"eng"}],"citation":{"ama":"Schröder J, Riese J, Vogelsang C, et al. Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests. Zeitschrift für Didaktik der Naturwissenschaften. Published online 2020:103-122. doi:10.1007/s40573-020-00115-w","bibtex":"@article{Schröder_Riese_Vogelsang_Borowski_Buschhüter_Enkrott_Kempin_Kulgemeyer_Reinhold_Schecker_2020, title={Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests}, DOI={10.1007/s40573-020-00115-w}, journal={Zeitschrift für Didaktik der Naturwissenschaften}, author={Schröder, Jan and Riese, Josef and Vogelsang, Christoph and Borowski, Andreas and Buschhüter, David and Enkrott, Patrick and Kempin, Maren and Kulgemeyer, Christoph and Reinhold, Peter and Schecker, Horst}, year={2020}, pages={103–122} }","mla":"Schröder, Jan, et al. “Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests.” Zeitschrift für Didaktik der Naturwissenschaften, 2020, pp. 103–22, doi:10.1007/s40573-020-00115-w.","short":"J. Schröder, J. Riese, C. Vogelsang, A. Borowski, D. Buschhüter, P. Enkrott, M. Kempin, C. Kulgemeyer, P. Reinhold, H. Schecker, Zeitschrift für Didaktik der Naturwissenschaften (2020) 103–122.","chicago":"Schröder, Jan, Josef Riese, Christoph Vogelsang, Andreas Borowski, David Buschhüter, Patrick Enkrott, Maren Kempin, Christoph Kulgemeyer, Peter Reinhold, and Horst Schecker. “Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests.” Zeitschrift für Didaktik der Naturwissenschaften, 2020, 103–22. https://doi.org/10.1007/s40573-020-00115-w.","apa":"Schröder, J., Riese, J., Vogelsang, C., Borowski, A., Buschhüter, D., Enkrott, P., Kempin, M., Kulgemeyer, C., Reinhold, P., & Schecker, H. (2020). Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests. Zeitschrift für Didaktik der Naturwissenschaften, 103–122. https://doi.org/10.1007/s40573-020-00115-w","ieee":"J. Schröder et al., “Die Messung der Fähigkeit zur Unterrichtsplanung im Fach Physik mit Hilfe eines standardisierten Performanztests,” Zeitschrift für Didaktik der Naturwissenschaften, pp. 103–122, 2020, doi: 10.1007/s40573-020-00115-w."},"publication":"Zeitschrift für Didaktik der Naturwissenschaften","department":[{"_id":"299"},{"_id":"33"}],"type":"journal_article","date_created":"2021-09-03T10:54:26Z"},{"place":"Wiesbaden","quality_controlled":"1","citation":{"chicago":"Vogelsang, Christoph, Andreas Borowski, Christoph Kulgemeyer, Josef Riese, David Buschhüter, Patrick Enkrott, Maren Kempin, Peter Reinhold, Horst Schecker, and Jan Schröder. “Development of Prospective Physics Teachers’ Professional Knowledge and Skills during a One-Semester School Internship.” In Student Learning in German Higher Education, edited by Olga Zlatkin-Troitschanskaia, Hans Anand Pant, Miriam Toepper, and Corinna Lautenbach, 105–23. Wiesbaden: Springer Fachmedien Wiesbaden, 2020. https://doi.org/10.1007/978-3-658-27886-1_6.","short":"C. Vogelsang, A. Borowski, C. Kulgemeyer, J. Riese, D. Buschhüter, P. Enkrott, M. Kempin, P. Reinhold, H. Schecker, J. Schröder, in: O. Zlatkin-Troitschanskaia, H.A. Pant, M. Toepper, C. Lautenbach (Eds.), Student Learning in German Higher Education, Springer Fachmedien Wiesbaden, Wiesbaden, 2020, pp. 105–123.","ieee":"C. Vogelsang et al., “Development of Prospective Physics Teachers’ Professional Knowledge and Skills during a One-Semester School Internship,” in Student Learning in German Higher Education, O. Zlatkin-Troitschanskaia, H. A. Pant, M. Toepper, and C. Lautenbach, Eds. Wiesbaden: Springer Fachmedien Wiesbaden, 2020, pp. 105–123.","apa":"Vogelsang, C., Borowski, A., Kulgemeyer, C., Riese, J., Buschhüter, D., Enkrott, P., Kempin, M., Reinhold, P., Schecker, H., & Schröder, J. (2020). Development of Prospective Physics Teachers’ Professional Knowledge and Skills during a One-Semester School Internship. In O. Zlatkin-Troitschanskaia, H. A. Pant, M. Toepper, & C. Lautenbach (Eds.), Student Learning in German Higher Education (pp. 105–123). Springer Fachmedien Wiesbaden. https://doi.org/10.1007/978-3-658-27886-1_6","bibtex":"@inbook{Vogelsang_Borowski_Kulgemeyer_Riese_Buschhüter_Enkrott_Kempin_Reinhold_Schecker_Schröder_2020, place={Wiesbaden}, title={Development of Prospective Physics Teachers’ Professional Knowledge and Skills during a One-Semester School Internship}, DOI={10.1007/978-3-658-27886-1_6}, booktitle={Student Learning in German Higher Education}, publisher={Springer Fachmedien Wiesbaden}, author={Vogelsang, Christoph and Borowski, Andreas and Kulgemeyer, Christoph and Riese, Josef and Buschhüter, David and Enkrott, Patrick and Kempin, Maren and Reinhold, Peter and Schecker, Horst and Schröder, Jan}, editor={Zlatkin-Troitschanskaia, Olga and Pant, Hans Anand and Toepper, Miriam and Lautenbach, Corinna}, year={2020}, pages={105–123} }","ama":"Vogelsang C, Borowski A, Kulgemeyer C, et al. Development of Prospective Physics Teachers’ Professional Knowledge and Skills during a One-Semester School Internship. In: Zlatkin-Troitschanskaia O, Pant HA, Toepper M, Lautenbach C, eds. Student Learning in German Higher Education. Springer Fachmedien Wiesbaden; 2020:105-123. doi:10.1007/978-3-658-27886-1_6","mla":"Vogelsang, Christoph, et al. “Development of Prospective Physics Teachers’ Professional Knowledge and Skills during a One-Semester School Internship.” Student Learning in German Higher Education, edited by Olga Zlatkin-Troitschanskaia et al., Springer Fachmedien Wiesbaden, 2020, pp. 105–23, doi:10.1007/978-3-658-27886-1_6."},"user_id":"4245","editor":[{"full_name":"Zlatkin-Troitschanskaia, Olga","first_name":"Olga","last_name":"Zlatkin-Troitschanskaia"},{"full_name":"Pant, Hans Anand","first_name":"Hans Anand","last_name":"Pant"},{"full_name":"Toepper, Miriam","first_name":"Miriam","last_name":"Toepper"},{"last_name":"Lautenbach","first_name":"Corinna","full_name":"Lautenbach, Corinna"}],"page":"105-123","_id":"45181","publisher":"Springer Fachmedien Wiesbaden","status":"public","type":"book_chapter","department":[{"_id":"299"},{"_id":"33"}],"date_created":"2023-05-20T10:29:48Z","publication":"Student Learning in German Higher Education","doi":"10.1007/978-3-658-27886-1_6","language":[{"iso":"eng"}],"date_updated":"2025-12-03T09:07:03Z","publication_status":"published","title":"Development of Prospective Physics Teachers’ Professional Knowledge and Skills during a One-Semester School Internship","year":"2020","author":[{"id":"4245","last_name":"Vogelsang","first_name":"Christoph","orcid":"0000-0002-5804-1855","full_name":"Vogelsang, Christoph"},{"last_name":"Borowski","first_name":"Andreas","full_name":"Borowski, Andreas"},{"full_name":"Kulgemeyer, Christoph","last_name":"Kulgemeyer","first_name":"Christoph","id":"84533"},{"first_name":"Josef","last_name":"Riese","orcid":"0000-0003-2927-2619","full_name":"Riese, Josef","id":"429"},{"last_name":"Buschhüter","first_name":"David","full_name":"Buschhüter, David"},{"last_name":"Enkrott","first_name":"Patrick","full_name":"Enkrott, Patrick"},{"first_name":"Maren","last_name":"Kempin","full_name":"Kempin, Maren"},{"first_name":"Peter","last_name":"Reinhold","full_name":"Reinhold, Peter","id":"416"},{"full_name":"Schecker, Horst","last_name":"Schecker","first_name":"Horst"},{"last_name":"Schröder","first_name":"Jan","full_name":"Schröder, Jan"}],"publication_identifier":{"isbn":["9783658278854","9783658278861"]}},{"citation":{"bibtex":"@article{Kulgemeyer_Borowski_Buschhüter_Enkrott_Kempin_Reinhold_Riese_Schecker_Schröder_Vogelsang_2020, title={Professional knowledge affects action-related skills: The development of preservice physics teachers’ explaining skills during a field experience}, volume={57}, DOI={10.1002/tea.21632}, journal={Journal of Research in Science Teaching}, publisher={Wiley}, author={Kulgemeyer, Christoph and Borowski, Andreas and Buschhüter, David and Enkrott, Patrick and Kempin, Maren and Reinhold, Peter and Riese, Josef and Schecker, Horst and Schröder, Jan and Vogelsang, Christoph}, year={2020}, pages={1–29} }","ama":"Kulgemeyer C, Borowski A, Buschhüter D, et al. Professional knowledge affects action-related skills: The development of preservice physics teachers’ explaining skills during a field experience. Journal of Research in Science Teaching. 2020;57:1-29. doi:10.1002/tea.21632","mla":"Kulgemeyer, Christoph, et al. “Professional Knowledge Affects Action-Related Skills: The Development of Preservice Physics Teachers’ Explaining Skills during a Field Experience.” Journal of Research in Science Teaching, vol. 57, Wiley, 2020, pp. 1–29, doi:10.1002/tea.21632.","chicago":"Kulgemeyer, Christoph, Andreas Borowski, David Buschhüter, Patrick Enkrott, Maren Kempin, Peter Reinhold, Josef Riese, Horst Schecker, Jan Schröder, and Christoph Vogelsang. “Professional Knowledge Affects Action-Related Skills: The Development of Preservice Physics Teachers’ Explaining Skills during a Field Experience.” Journal of Research in Science Teaching 57 (2020): 1–29. https://doi.org/10.1002/tea.21632.","short":"C. Kulgemeyer, A. Borowski, D. Buschhüter, P. Enkrott, M. Kempin, P. Reinhold, J. Riese, H. Schecker, J. Schröder, C. Vogelsang, Journal of Research in Science Teaching 57 (2020) 1–29.","ieee":"C. Kulgemeyer et al., “Professional knowledge affects action-related skills: The development of preservice physics teachers’ explaining skills during a field experience,” Journal of Research in Science Teaching, vol. 57, pp. 1–29, 2020, doi: 10.1002/tea.21632.","apa":"Kulgemeyer, C., Borowski, A., Buschhüter, D., Enkrott, P., Kempin, M., Reinhold, P., Riese, J., Schecker, H., Schröder, J., & Vogelsang, C. (2020). Professional knowledge affects action-related skills: The development of preservice physics teachers’ explaining skills during a field experience. Journal of Research in Science Teaching, 57, 1–29. https://doi.org/10.1002/tea.21632"},"quality_controlled":"1","publisher":"Wiley","_id":"45180","page":"1-29","volume":57,"user_id":"4245","status":"public","date_created":"2023-05-20T10:25:46Z","department":[{"_id":"299"},{"_id":"33"}],"keyword":["Education"],"type":"journal_article","publication":"Journal of Research in Science Teaching","language":[{"iso":"eng"}],"doi":"10.1002/tea.21632","publication_identifier":{"issn":["0022-4308","1098-2736"]},"author":[{"id":"84533","last_name":"Kulgemeyer","first_name":"Christoph","full_name":"Kulgemeyer, Christoph"},{"last_name":"Borowski","first_name":"Andreas","full_name":"Borowski, Andreas"},{"last_name":"Buschhüter","first_name":"David","full_name":"Buschhüter, David"},{"first_name":"Patrick","last_name":"Enkrott","full_name":"Enkrott, Patrick"},{"full_name":"Kempin, Maren","last_name":"Kempin","first_name":"Maren"},{"full_name":"Reinhold, Peter","last_name":"Reinhold","first_name":"Peter","id":"416"},{"id":"429","orcid":"0000-0003-2927-2619","last_name":"Riese","first_name":"Josef","full_name":"Riese, Josef"},{"full_name":"Schecker, Horst","first_name":"Horst","last_name":"Schecker"},{"full_name":"Schröder, Jan","last_name":"Schröder","first_name":"Jan"},{"full_name":"Vogelsang, Christoph","first_name":"Christoph","last_name":"Vogelsang","orcid":"0000-0002-5804-1855","id":"4245"}],"year":"2020","title":"Professional knowledge affects action-related skills: The development of preservice physics teachers’ explaining skills during a field experience","intvolume":" 57","publication_status":"published","date_updated":"2025-12-03T09:06:52Z"},{"author":[{"first_name":"Christoph","last_name":"Kulgemeyer","full_name":"Kulgemeyer, Christoph"},{"full_name":"Borowski, Andreas","last_name":"Borowski","first_name":"Andreas"},{"first_name":"David","last_name":"Buschhüter","full_name":"Buschhüter, David"},{"full_name":"Enkrott, Patrick","last_name":"Enkrott","first_name":"Patrick"},{"last_name":"Kempin","first_name":"Maren","full_name":"Kempin, Maren"},{"full_name":"Reinhold, Peter","last_name":"Reinhold","first_name":"Peter"},{"last_name":"Riese","first_name":"Josef","full_name":"Riese, Josef"},{"full_name":"Schecker, Horst","last_name":"Schecker","first_name":"Horst"},{"full_name":"Schröder, Jan","first_name":"Jan","last_name":"Schröder"},{"full_name":"Vogelsang, Christoph","last_name":"Vogelsang","orcid":"0000-0002-5804-1855","first_name":"Christoph","id":"4245"}],"publication_identifier":{"issn":["0022-4308","1098-2736"]},"year":"2020","status":"public","title":"Professional knowledge affects action‐related skills: The development of preservice physics teachers' explaining skills during a field experience","date_updated":"2025-12-03T09:07:38Z","publication_status":"published","_id":"23743","language":[{"iso":"eng"}],"page":"1554-1582","doi":"10.1002/tea.21632","user_id":"4245","citation":{"mla":"Kulgemeyer, Christoph, et al. “Professional Knowledge Affects Action‐related Skills: The Development of Preservice Physics Teachers’ Explaining Skills during a Field Experience.” Journal of Research in Science Teaching, 2020, pp. 1554–82, doi:10.1002/tea.21632.","bibtex":"@article{Kulgemeyer_Borowski_Buschhüter_Enkrott_Kempin_Reinhold_Riese_Schecker_Schröder_Vogelsang_2020, title={Professional knowledge affects action‐related skills: The development of preservice physics teachers’ explaining skills during a field experience}, DOI={10.1002/tea.21632}, journal={Journal of Research in Science Teaching}, author={Kulgemeyer, Christoph and Borowski, Andreas and Buschhüter, David and Enkrott, Patrick and Kempin, Maren and Reinhold, Peter and Riese, Josef and Schecker, Horst and Schröder, Jan and Vogelsang, Christoph}, year={2020}, pages={1554–1582} }","ama":"Kulgemeyer C, Borowski A, Buschhüter D, et al. Professional knowledge affects action‐related skills: The development of preservice physics teachers’ explaining skills during a field experience. Journal of Research in Science Teaching. Published online 2020:1554-1582. doi:10.1002/tea.21632","ieee":"C. Kulgemeyer et al., “Professional knowledge affects action‐related skills: The development of preservice physics teachers’ explaining skills during a field experience,” Journal of Research in Science Teaching, pp. 1554–1582, 2020, doi: 10.1002/tea.21632.","apa":"Kulgemeyer, C., Borowski, A., Buschhüter, D., Enkrott, P., Kempin, M., Reinhold, P., Riese, J., Schecker, H., Schröder, J., & Vogelsang, C. (2020). Professional knowledge affects action‐related skills: The development of preservice physics teachers’ explaining skills during a field experience. Journal of Research in Science Teaching, 1554–1582. https://doi.org/10.1002/tea.21632","short":"C. Kulgemeyer, A. Borowski, D. Buschhüter, P. Enkrott, M. Kempin, P. Reinhold, J. Riese, H. Schecker, J. Schröder, C. Vogelsang, Journal of Research in Science Teaching (2020) 1554–1582.","chicago":"Kulgemeyer, Christoph, Andreas Borowski, David Buschhüter, Patrick Enkrott, Maren Kempin, Peter Reinhold, Josef Riese, Horst Schecker, Jan Schröder, and Christoph Vogelsang. “Professional Knowledge Affects Action‐related Skills: The Development of Preservice Physics Teachers’ Explaining Skills during a Field Experience.” Journal of Research in Science Teaching, 2020, 1554–82. https://doi.org/10.1002/tea.21632."},"publication":"Journal of Research in Science Teaching","quality_controlled":"1","date_created":"2021-09-03T10:55:32Z","department":[{"_id":"299"},{"_id":"33"}],"type":"journal_article"},{"abstract":[{"text":"The simulation of complex engineering components and structures under loads requires the formulation and adequate calibration of appropriate material models. This work introduces an optimisation-based scheme for the calibration of viscoelastic material models that are coupled to gradient-enhanced damage in a finite strain setting. The parameter identification scheme is applied to a self-diagnostic poly(dimethylsiloxane) (PDMS) elastomer, where so-called mechanophore units are incorporated within the polymeric microstructure. The present contribution, however, focuses on the purely mechanical response of the material, combining experiments with homogeneous and inhomogeneous states of deformation. In effect, the results provided lay the groundwork for a future extension of the proposed parameter identification framework, where additional field-data provided by the self-diagnostic capabilities can be incorporated into the optimisation scheme.","lang":"eng"}],"issue":"14","publication":"Materials","department":[{"_id":"952"},{"_id":"321"}],"type":"journal_article","date_created":"2025-12-03T13:00:05Z","intvolume":" 13","date_updated":"2025-12-03T13:00:55Z","publication_status":"published","author":[{"full_name":"Schulte, Robin","last_name":"Schulte","first_name":"Robin"},{"full_name":"Ostwald, Richard","first_name":"Richard","last_name":"Ostwald","orcid":"0000-0003-2147-8444","id":"106876"},{"first_name":"Andreas","last_name":"Menzel","full_name":"Menzel, Andreas"}],"publication_identifier":{"issn":["1996-1944"]},"title":"Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework","year":"2020","doi":"10.3390/ma13143156","language":[{"iso":"eng"}],"article_number":"3156","quality_controlled":"1","citation":{"bibtex":"@article{Schulte_Ostwald_Menzel_2020, title={Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework}, volume={13}, DOI={10.3390/ma13143156}, number={143156}, journal={Materials}, publisher={MDPI AG}, author={Schulte, Robin and Ostwald, Richard and Menzel, Andreas}, year={2020} }","ama":"Schulte R, Ostwald R, Menzel A. Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework. Materials. 2020;13(14). doi:10.3390/ma13143156","mla":"Schulte, Robin, et al. “Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework.” Materials, vol. 13, no. 14, 3156, MDPI AG, 2020, doi:10.3390/ma13143156.","chicago":"Schulte, Robin, Richard Ostwald, and Andreas Menzel. “Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework.” Materials 13, no. 14 (2020). https://doi.org/10.3390/ma13143156.","short":"R. Schulte, R. Ostwald, A. Menzel, Materials 13 (2020).","ieee":"R. Schulte, R. Ostwald, and A. Menzel, “Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework,” Materials, vol. 13, no. 14, Art. no. 3156, 2020, doi: 10.3390/ma13143156.","apa":"Schulte, R., Ostwald, R., & Menzel, A. (2020). Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework. Materials, 13(14), Article 3156. https://doi.org/10.3390/ma13143156"},"status":"public","volume":13,"user_id":"85414","_id":"62777","publisher":"MDPI AG"},{"user_id":"85414","volume":14,"page":"115-121","publisher":"Springer Science and Business Media LLC","_id":"62778","status":"public","quality_controlled":"1","citation":{"short":"K. Langenfeld, A. Schowtjak, R. Schulte, O. Hering, K. Möhring, T. Clausmeyer, R. Ostwald, F. Walther, A.E. Tekkaya, J. Mosler, Production Engineering 14 (2020) 115–121.","ama":"Langenfeld K, Schowtjak A, Schulte R, et al. Influence of anisotropic damage evolution on cold forging. Production Engineering. 2020;14(1):115-121. doi:10.1007/s11740-019-00942-y","chicago":"Langenfeld, Kai, Alexander Schowtjak, Robin Schulte, Oliver Hering, Kerstin Möhring, Till Clausmeyer, Richard Ostwald, Frank Walther, A. Erman Tekkaya, and Jörn Mosler. “Influence of Anisotropic Damage Evolution on Cold Forging.” Production Engineering 14, no. 1 (2020): 115–21. https://doi.org/10.1007/s11740-019-00942-y.","bibtex":"@article{Langenfeld_Schowtjak_Schulte_Hering_Möhring_Clausmeyer_Ostwald_Walther_Tekkaya_Mosler_2020, title={Influence of anisotropic damage evolution on cold forging}, volume={14}, DOI={10.1007/s11740-019-00942-y}, number={1}, journal={Production Engineering}, publisher={Springer Science and Business Media LLC}, author={Langenfeld, Kai and Schowtjak, Alexander and Schulte, Robin and Hering, Oliver and Möhring, Kerstin and Clausmeyer, Till and Ostwald, Richard and Walther, Frank and Tekkaya, A. Erman and Mosler, Jörn}, year={2020}, pages={115–121} }","apa":"Langenfeld, K., Schowtjak, A., Schulte, R., Hering, O., Möhring, K., Clausmeyer, T., Ostwald, R., Walther, F., Tekkaya, A. E., & Mosler, J. (2020). Influence of anisotropic damage evolution on cold forging. Production Engineering, 14(1), 115–121. https://doi.org/10.1007/s11740-019-00942-y","mla":"Langenfeld, Kai, et al. “Influence of Anisotropic Damage Evolution on Cold Forging.” Production Engineering, vol. 14, no. 1, Springer Science and Business Media LLC, 2020, pp. 115–21, doi:10.1007/s11740-019-00942-y.","ieee":"K. Langenfeld et al., “Influence of anisotropic damage evolution on cold forging,” Production Engineering, vol. 14, no. 1, pp. 115–121, 2020, doi: 10.1007/s11740-019-00942-y."},"doi":"10.1007/s11740-019-00942-y","language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2025-12-03T13:02:23Z","intvolume":" 14","year":"2020","title":"Influence of anisotropic damage evolution on cold forging","author":[{"last_name":"Langenfeld","first_name":"Kai","full_name":"Langenfeld, Kai"},{"first_name":"Alexander","last_name":"Schowtjak","full_name":"Schowtjak, Alexander"},{"last_name":"Schulte","first_name":"Robin","full_name":"Schulte, Robin"},{"full_name":"Hering, Oliver","first_name":"Oliver","last_name":"Hering"},{"last_name":"Möhring","first_name":"Kerstin","full_name":"Möhring, Kerstin"},{"first_name":"Till","last_name":"Clausmeyer","full_name":"Clausmeyer, Till"},{"id":"106876","full_name":"Ostwald, Richard","first_name":"Richard","orcid":"0000-0003-2147-8444","last_name":"Ostwald"},{"last_name":"Walther","first_name":"Frank","full_name":"Walther, Frank"},{"full_name":"Tekkaya, A. 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Erman}, year={2020}, pages={649–655} }","ama":"Clausmeyer T, Schowtjak A, Wang S, et al. Prediction of Ductile Damage in the Process Chain of Caliber Rolling and Forward Rod Extrusion. Procedia Manufacturing. 2020;47:649-655. doi:10.1016/j.promfg.2020.04.201","ieee":"T. Clausmeyer et al., “Prediction of Ductile Damage in the Process Chain of Caliber Rolling and Forward Rod Extrusion,” Procedia Manufacturing, vol. 47, pp. 649–655, 2020, doi: 10.1016/j.promfg.2020.04.201.","apa":"Clausmeyer, T., Schowtjak, A., Wang, S., Gitschel, R., Hering, O., Pavliuchenko, P., Lohmar, J., Ostwald, R., Hirt, G., & Tekkaya, A. E. (2020). Prediction of Ductile Damage in the Process Chain of Caliber Rolling and Forward Rod Extrusion. Procedia Manufacturing, 47, 649–655. https://doi.org/10.1016/j.promfg.2020.04.201","chicago":"Clausmeyer, Till, Alexander Schowtjak, Shuhan Wang, Robin Gitschel, Oliver Hering, Pavlo Pavliuchenko, Johannes Lohmar, Richard Ostwald, Gerhard Hirt, and A. Erman Tekkaya. “Prediction of Ductile Damage in the Process Chain of Caliber Rolling and Forward Rod Extrusion.” Procedia Manufacturing 47 (2020): 649–55. https://doi.org/10.1016/j.promfg.2020.04.201.","short":"T. Clausmeyer, A. Schowtjak, S. Wang, R. Gitschel, O. Hering, P. Pavliuchenko, J. Lohmar, R. Ostwald, G. Hirt, A.E. Tekkaya, Procedia Manufacturing 47 (2020) 649–655."},"volume":47,"user_id":"85414","_id":"62776","publisher":"Elsevier BV","page":"649-655","status":"public","department":[{"_id":"952"},{"_id":"321"}],"type":"journal_article","date_created":"2025-12-03T12:58:23Z","publication":"Procedia Manufacturing","doi":"10.1016/j.promfg.2020.04.201","language":[{"iso":"eng"}],"intvolume":" 47","publication_status":"published","date_updated":"2025-12-03T12:59:23Z","author":[{"last_name":"Clausmeyer","first_name":"Till","full_name":"Clausmeyer, Till"},{"full_name":"Schowtjak, Alexander","first_name":"Alexander","last_name":"Schowtjak"},{"full_name":"Wang, Shuhan","first_name":"Shuhan","last_name":"Wang"},{"first_name":"Robin","last_name":"Gitschel","full_name":"Gitschel, Robin"},{"first_name":"Oliver","last_name":"Hering","full_name":"Hering, Oliver"},{"full_name":"Pavliuchenko, Pavlo","last_name":"Pavliuchenko","first_name":"Pavlo"},{"full_name":"Lohmar, Johannes","last_name":"Lohmar","first_name":"Johannes"},{"full_name":"Ostwald, Richard","orcid":"0000-0003-2147-8444","first_name":"Richard","last_name":"Ostwald","id":"106876"},{"full_name":"Hirt, Gerhard","last_name":"Hirt","first_name":"Gerhard"},{"full_name":"Tekkaya, A. 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Selbstbau eines digitalen Low-Cost-Fotometers für den Chemieunterricht. CHEMKON. 2020;27(4):193-198. doi:10.1002/ckon.201900026","ieee":"T. Witte, S. Hanemann, H. Sommerfeld, K. Temmen, and S. Fechner, “Selbstbau eines digitalen Low-Cost-Fotometers für den Chemieunterricht,” CHEMKON, vol. 27, no. 4, pp. 193–198, 2020, doi: 10.1002/ckon.201900026.","apa":"Witte, T., Hanemann, S., Sommerfeld, H., Temmen, K., & Fechner, S. (2020). Selbstbau eines digitalen Low-Cost-Fotometers für den Chemieunterricht. CHEMKON, 27(4), 193–198. https://doi.org/10.1002/ckon.201900026","chicago":"Witte, Thomas, Stefan Hanemann, Herbert Sommerfeld, Katrin Temmen, and Sabine Fechner. “Selbstbau eines digitalen Low-Cost-Fotometers für den Chemieunterricht.” CHEMKON 27, no. 4 (2020): 193–98. https://doi.org/10.1002/ckon.201900026.","short":"T. Witte, S. Hanemann, H. Sommerfeld, K. Temmen, S. Fechner, CHEMKON 27 (2020) 193–198."}},{"title":"A Quartz Crystal Microbalance, Which Tracks Four Overtones in Parallel with a Time Resolution of 10 Milliseconds: Application to Inkjet Printing","year":"2020","author":[{"full_name":"Leppin, Christian","last_name":"Leppin","first_name":"Christian","id":"117722"},{"first_name":"Sven","last_name":"Hampel","full_name":"Hampel, Sven"},{"full_name":"Meyer, Frederick Sebastian","first_name":"Frederick Sebastian","last_name":"Meyer"},{"first_name":"Arne","last_name":"Langhoff","full_name":"Langhoff, Arne"},{"first_name":"Ursula Elisabeth Adriane","last_name":"Fittschen","full_name":"Fittschen, Ursula Elisabeth Adriane"},{"full_name":"Johannsmann, Diethelm","last_name":"Johannsmann","first_name":"Diethelm"}],"publication_identifier":{"issn":["1424-8220"]},"date_updated":"2025-12-18T17:33:50Z","publication_status":"published","intvolume":" 20","article_number":"5915","language":[{"iso":"eng"}],"doi":"10.3390/s20205915","publication":"Sensors","issue":"20","abstract":[{"lang":"eng","text":"A quartz crystal microbalance (QCM) is described, which simultaneously determines resonance frequency and bandwidth on four different overtones. The time resolution is 10 milliseconds. This fast, multi-overtone QCM is based on multi-frequency lockin amplification. Synchronous interrogation of overtones is needed, when the sample changes quickly and when information on the sample is to be extracted from the comparison between overtones. The application example is thermal inkjet-printing. At impact, the resonance frequencies change over a time shorter than 10 milliseconds. There is a further increase in the contact area, evidenced by an increasing common prefactor to the shifts in frequency, Δf, and half-bandwidth, ΔΓ. The ratio ΔΓ/(−Δf), which quantifies the energy dissipated per time and unit area, decreases with time. Often, there is a fast initial decrease, lasting for about 100 milliseconds, followed by a slower decrease, persisting over the entire drying time (a few seconds). Fitting the overtone dependence of Δf(n) and ΔΓ(n) with power laws, one finds power-law exponents of about 1/2, characteristic of semi-infinite Newtonian liquids. The power-law exponents corresponding to Δf(n) slightly increase with time. The decrease of ΔΓ/(−Δf) and the increase of the exponents are explained by evaporation and formation of a solid film at the resonator surface."}],"extern":"1","date_created":"2025-12-18T17:29:29Z","type":"journal_article","status":"public","_id":"63239","publisher":"MDPI AG","user_id":"117722","volume":20,"citation":{"ieee":"C. Leppin, S. Hampel, F. S. Meyer, A. Langhoff, U. E. A. Fittschen, and D. Johannsmann, “A Quartz Crystal Microbalance, Which Tracks Four Overtones in Parallel with a Time Resolution of 10 Milliseconds: Application to Inkjet Printing,” Sensors, vol. 20, no. 20, Art. no. 5915, 2020, doi: 10.3390/s20205915.","apa":"Leppin, C., Hampel, S., Meyer, F. S., Langhoff, A., Fittschen, U. E. A., & Johannsmann, D. (2020). A Quartz Crystal Microbalance, Which Tracks Four Overtones in Parallel with a Time Resolution of 10 Milliseconds: Application to Inkjet Printing. Sensors, 20(20), Article 5915. https://doi.org/10.3390/s20205915","chicago":"Leppin, Christian, Sven Hampel, Frederick Sebastian Meyer, Arne Langhoff, Ursula Elisabeth Adriane Fittschen, and Diethelm Johannsmann. “A Quartz Crystal Microbalance, Which Tracks Four Overtones in Parallel with a Time Resolution of 10 Milliseconds: Application to Inkjet Printing.” Sensors 20, no. 20 (2020). https://doi.org/10.3390/s20205915.","short":"C. Leppin, S. Hampel, F.S. Meyer, A. Langhoff, U.E.A. Fittschen, D. Johannsmann, Sensors 20 (2020).","mla":"Leppin, Christian, et al. “A Quartz Crystal Microbalance, Which Tracks Four Overtones in Parallel with a Time Resolution of 10 Milliseconds: Application to Inkjet Printing.” Sensors, vol. 20, no. 20, 5915, MDPI AG, 2020, doi:10.3390/s20205915.","bibtex":"@article{Leppin_Hampel_Meyer_Langhoff_Fittschen_Johannsmann_2020, title={A Quartz Crystal Microbalance, Which Tracks Four Overtones in Parallel with a Time Resolution of 10 Milliseconds: Application to Inkjet Printing}, volume={20}, DOI={10.3390/s20205915}, number={205915}, journal={Sensors}, publisher={MDPI AG}, author={Leppin, Christian and Hampel, Sven and Meyer, Frederick Sebastian and Langhoff, Arne and Fittschen, Ursula Elisabeth Adriane and Johannsmann, Diethelm}, year={2020} }","ama":"Leppin C, Hampel S, Meyer FS, Langhoff A, Fittschen UEA, Johannsmann D. A Quartz Crystal Microbalance, Which Tracks Four Overtones in Parallel with a Time Resolution of 10 Milliseconds: Application to Inkjet Printing. Sensors. 2020;20(20). doi:10.3390/s20205915"},"quality_controlled":"1"},{"doi":"10.1116/1.5140619","article_number":"021004","language":[{"iso":"eng"}],"date_updated":"2025-12-18T17:35:30Z","publication_status":"published","intvolume":" 15","title":"Fast pH-mediated changes of the viscosity of protein solutions studied with a voltage-modulated quartz crystal microbalance","year":"2020","publication_identifier":{"issn":["1934-8630","1559-4106"]},"author":[{"first_name":"Alexander","last_name":"Gödde","full_name":"Gödde, Alexander"},{"last_name":"Leppin","first_name":"Christian","full_name":"Leppin, Christian","id":"117722"},{"full_name":"Meyer, Frederick S.","first_name":"Frederick S.","last_name":"Meyer"},{"full_name":"Langhoff, Arne","last_name":"Langhoff","first_name":"Arne"},{"full_name":"Hartl, Josef","last_name":"Hartl","first_name":"Josef"},{"full_name":"Garidel, Patrick","first_name":"Patrick","last_name":"Garidel"},{"first_name":"Diethelm","last_name":"Johannsmann","full_name":"Johannsmann, Diethelm"}],"type":"journal_article","date_created":"2025-12-18T17:31:15Z","abstract":[{"lang":"eng","text":"An electrochemical quartz crystal microbalance is described, which achieves a time resolution down to 100 μs. Accumulation and averaging over a few hours bring the noise down to about 30 mHz. The application examples are pH-driven viscosity changes in albumin solutions. The pH was switched with the electrode potential. The characteristic response time is in the millisecond range. The focus is on experimental aspects as well as advantages and limitations of the technique."}],"extern":"1","publication":"Biointerphases","issue":"2","user_id":"117722","volume":15,"publisher":"American Vacuum Society","_id":"63240","status":"public","quality_controlled":"1","citation":{"ama":"Gödde A, Leppin C, Meyer FS, et al. Fast pH-mediated changes of the viscosity of protein solutions studied with a voltage-modulated quartz crystal microbalance. Biointerphases. 2020;15(2). doi:10.1116/1.5140619","bibtex":"@article{Gödde_Leppin_Meyer_Langhoff_Hartl_Garidel_Johannsmann_2020, title={Fast pH-mediated changes of the viscosity of protein solutions studied with a voltage-modulated quartz crystal microbalance}, volume={15}, DOI={10.1116/1.5140619}, number={2021004}, journal={Biointerphases}, publisher={American Vacuum Society}, author={Gödde, Alexander and Leppin, Christian and Meyer, Frederick S. and Langhoff, Arne and Hartl, Josef and Garidel, Patrick and Johannsmann, Diethelm}, year={2020} }","mla":"Gödde, Alexander, et al. “Fast pH-Mediated Changes of the Viscosity of Protein Solutions Studied with a Voltage-Modulated Quartz Crystal Microbalance.” Biointerphases, vol. 15, no. 2, 021004, American Vacuum Society, 2020, doi:10.1116/1.5140619.","short":"A. Gödde, C. Leppin, F.S. Meyer, A. Langhoff, J. Hartl, P. Garidel, D. Johannsmann, Biointerphases 15 (2020).","chicago":"Gödde, Alexander, Christian Leppin, Frederick S. Meyer, Arne Langhoff, Josef Hartl, Patrick Garidel, and Diethelm Johannsmann. “Fast pH-Mediated Changes of the Viscosity of Protein Solutions Studied with a Voltage-Modulated Quartz Crystal Microbalance.” Biointerphases 15, no. 2 (2020). https://doi.org/10.1116/1.5140619.","apa":"Gödde, A., Leppin, C., Meyer, F. S., Langhoff, A., Hartl, J., Garidel, P., & Johannsmann, D. (2020). Fast pH-mediated changes of the viscosity of protein solutions studied with a voltage-modulated quartz crystal microbalance. Biointerphases, 15(2), Article 021004. https://doi.org/10.1116/1.5140619","ieee":"A. Gödde et al., “Fast pH-mediated changes of the viscosity of protein solutions studied with a voltage-modulated quartz crystal microbalance,” Biointerphases, vol. 15, no. 2, Art. no. 021004, 2020, doi: 10.1116/1.5140619."}}]