@article{TischbeinDorendorfSchmogeretal.2023, author = {Tischbein, Franziska and Dorendorf, Stefan and Schmoger, Christin and Wirtz, Frank and Wilch, Michael and Echternacht, David}, title = {Ausstattung von Niederspannungsnetzen mit Messtechnik f{\"u}r eine netzorientierte Steuerung}, series = {Energiewirtschaftliche Tagesfragen}, volume = {73}, journal = {Energiewirtschaftliche Tagesfragen}, number = {12}, publisher = {VDE Verlag}, issn = {0720-6240}, pages = {44 -- 47}, year = {2023}, language = {de} } @article{MolloyMuellerDeeganetal.2024, author = {Molloy, Dara and M{\"u}ller, Patrick and Deegan, Brian and Mullins, Darragh and Horgan, Jonathan and Ward, Enda and Jones, Edward and Braun, Alexander and Glavin, Martin}, title = {Analysis of the Impact of Lens Blur on Safety-Critical Automotive Object Detection}, series = {IEEE Access}, volume = {12}, journal = {IEEE Access}, publisher = {IEEE}, issn = {2169-3536}, doi = {10.1109/ACCESS.2023.3348663}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-42999}, pages = {3554 -- 3569}, year = {2024}, abstract = {Camera-based object detection is widely used in safety-critical applications such as advanced driver assistance systems (ADAS) and autonomous vehicle research. Road infrastructure has been designed for human vision, so computer vision, with RGB cameras, is a vital source of semantic information from the environment. Sensors, such as LIDAR and RADAR, are also often utilized for these applications; however, cameras provide a higher spatial resolution and color information. The spatial frequency response (SFR), or sharpness of a camera, utilized in object detection systems must be sufficient to allow a detection algorithm to localize objects in the environment over its lifetime reliably. This study explores the relationship between object detection performance and SFR. Six state-of-the-art object detection models are evaluated with varying levels of lens defocus. A novel raw image dataset is created and utilized, containing pedestrians and cars over a range of distances up to 100-m from the sensor. Object detection performance for each defocused dataset is analyzed over a range of distances to determine the minimum SFR necessary in each case. Results show that the relationship between object detection performance and lens blur is much more complex than previous studies have found due to lens field curvature, chromatic aberration, and astigmatisms. We have found that smaller objects are disproportionately impacted by lens blur, and different object detection models have differing levels of robustness to lens blur}, language = {en} } @article{GeerkensSieberichsBraunetal.2024, author = {Geerkens, Simon and Sieberichs, Christian and Braun, Alexander and Waschulzik, Thomas}, title = {QI²: an interactive tool for data quality assurance}, series = {AI and Ethics}, journal = {AI and Ethics}, publisher = {Springer Nature}, issn = {2730-5961}, doi = {10.1007/s43681-023-00390-6}, year = {2024}, abstract = {The importance of high data quality is increasing with the growing impact and distribution of ML systems and big data. Also, the planned AI Act from the European commission defines challenging legal requirements for data quality especially for the market introduction of safety relevant ML systems. In this paper, we introduce a novel approach that supports the data quality assurance process of multiple data quality aspects. This approach enables the verification of quantitative data quality requirements. The concept and benefits are introduced and explained on small example data sets. How the method is applied is demonstrated on the well-known MNIST data set based an handwritten digits.}, language = {en} } @article{SieberichsGeerkensBraunetal.2024, author = {Sieberichs, Christian and Geerkens, Simon and Braun, Alexander and Waschulzik, Thomas}, title = {ECS: an interactive tool for data quality assurance}, series = {AI and Ethics}, journal = {AI and Ethics}, publisher = {Springer Nature}, issn = {2730-5961}, doi = {10.1007/s43681-023-00393-3}, year = {2024}, abstract = {With the increasing capabilities of machine learning systems and their potential use in safety-critical systems, ensuring high-quality data is becoming increasingly important. In this paper, we present a novel approach for the assurance of data quality. For this purpose, the mathematical basics are first discussed and the approach is presented using multiple examples. This results in the detection of data points with potentially harmful properties for the use in safety-critical systems.}, language = {en} } @misc{BraunRichwinWeber2009, author = {Braun, Alexander and Richwin, Matthias and Weber, Thomas}, title = {Optoelektronische Sensoreinrichtung f{\"u}r ein Kraftfahrzeug}, publisher = {Deutsches Patent- und Markenamt}, pages = {10}, year = {2009}, abstract = {Beschrieben wird eine optoelektronische Sensoreinrichtung f{\"u}r ein Kraftfahrzeug zur unterscheidenden Detektion von Feuchtigkeit und Salzl{\"o}sungen auf einer Fahrzeugscheibe, mit einer Beleuchtungseinheit zur Einstrahlung von Licht in eine Fahrzeugscheibe und mit einem Lichtempf{\"a}nger, welcher von der Fahrzeugscheibe reflektiertes Licht erfasst, sowie mit einem Koppelelement zur Ein- und Auskopplung von Licht in bzw. aus der Fahrzeugscheibe, wobei die Beleuchtungseinrichtung Licht {\"u}ber einen Einfallswinkelbereich in die Fahrzeugscheibe einstrahlt, der sich {\"u}ber mehrere Winkelgrade erstreckt, wobei der Lichtempf{\"a}nger eine Vielzahl von Empfangselementen aufweist, wobei ein optisches System das von der Fahrzeugscheibe in einen Ausfallswinkelbereich reflektierte Licht auf Empfangselemente des Lichtempf{\"a}ngers abbildet und wobei der Lichtempf{\"a}nger ein Signal generiert, aus dem eine Auswertevorrichtung den Grenzwinkel der Totalreflexion an der Fahrzeugscheibe ermittelt.}, language = {de} } @unpublished{GeerkensSieberichsBraunetal.2023, author = {Geerkens, Simon and Sieberichs, Christian and Braun, Alexander and Waschulzik, Thomas}, title = {QI2 -- an Interactive Tool for Data Quality Assurance}, address = {arXiv}, year = {2023}, abstract = {The importance of high data quality is increasing with the growing impact and distribution of ML systems and big data. Also the planned AI Act from the European commission defines challenging legal requirements for data quality especially for the market introduction of safety relevant ML systems. In this paper we introduce a novel approach that supports the data quality assurance process of multiple data quality aspects. This approach enables the verification of quantitative data quality requirements. The concept and benefits are introduced and explained on small example data sets. How the method is applied is demonstrated on the well known MNIST data set based an handwritten digits.}, language = {en} } @article{WolfUlrichBraun2023, author = {Wolf, Dominik Werner and Ulrich, Markus and Braun, Alexander}, title = {Novel developments of refractive power measurement techniques in the automotive world}, series = {Metrologia}, journal = {Metrologia}, number = {ACCEPTED MANUSCRIPT}, publisher = {IOP Publishing}, issn = {1681-7575}, doi = {10.1088/1681-7575/acf1a4}, year = {2023}, abstract = {Refractive power measurements serve as the primary quality standard in the automotive glazing industry. In the light of autonomous driving new optical metrics are becoming more and more popular for specifying optical quality requirements for the windshield. Nevertheless, the link between those quantities and the refractive power needs to be established in order to ensure a holistic requirement profile for the windshield. As a consequence, traceable high-resolution refractive power measurements are still required for the glass quality assessment. Standard measurement systems using Moir{\´e} patterns for refractive power monitoring in the automotive industry are highly resolution limited, wherefore they are insufficient for evaluating the camera window area. Consequently, there is a need for more sophisticated refractive power measurement systems that provide a higher spatial resolution. In addition, a calibration procedure has to be developed in order to guarantee for comparability of the measurement results. For increasing the resolution, a measurement setup based on an auto-correlation algorithm is tested in this paper. Furthermore, a calibration procedure is established by using a single reference lens with a nominal refractive power of 100 km-1. For the calibration of the entire measurement range of the system, the lens is tilted by an inclination angle orthogonal to the optical axis. The effective refractive power is then given by the Kerkhof model. By adopting the measurement and calibration procedure presented in this paper, glass suppliers in the automotive industry will be able to detect relevant manufacturing defects within the camera window area more accurately paving the way for a holistic quality assurance of the windshield for future advanced driver-assistance system (ADAS) functionalities. Concurrently, the traceability of the measurement results is ensured by establishing a calibration chain based on a single reference lens, which is traced back to international standards.}, language = {en} } @inproceedings{MuellerBraunKeuper2022, author = {M{\"u}ller, Patrick and Braun, Alexander and Keuper, Margret}, title = {Impact of realistic properties of the point spread function on classification tasks to reveal a possible distribution shift}, series = {NeurIPS 2022: Workshop on Distribution Shifts: Connecting Methods and Applications, December 3rd, 2022, New Orleans, USA}, booktitle = {NeurIPS 2022: Workshop on Distribution Shifts: Connecting Methods and Applications, December 3rd, 2022, New Orleans, USA}, address = {New Orleans}, year = {2022}, language = {en} } @unpublished{SieberichsGeerkensBraunetal.2023, author = {Sieberichs, Christian and Geerkens, Simon and Braun, Alexander and Waschulzik, Thomas}, title = {ECS -- an Interactive Tool for Data Quality Assurance}, publisher = {arXiv}, doi = {10.48550/arXiv.2307.04368}, year = {2023}, abstract = {With the increasing capabilities of machine learning systems and their potential use in safety-critical systems, ensuring high-quality data is becoming increasingly important. In this paper we present a novel approach for the assurance of data quality. For this purpose, the mathematical basics are first discussed and the approach is presented using multiple examples. This results in the detection of data points with potentially harmful properties for the use in safety-critical systems.}, language = {en} } @inproceedings{MuellerBraun2022, author = {M{\"u}ller, Patrick and Braun, Alexander}, title = {Simulating optical properties to access novel metrological parameter ranges and the impact of different model approximations}, series = {2022 IEEE International Workshop on Metrology for Automotive (MetroAutomotive), 4-6 July 2022}, booktitle = {2022 IEEE International Workshop on Metrology for Automotive (MetroAutomotive), 4-6 July 2022}, publisher = {IEEE}, isbn = {978-1-6654-6689-9}, doi = {10.1109/MetroAutomotive54295.2022.9855079}, pages = {133 -- 138}, year = {2022}, language = {en} } @article{MuellerBraun2023, author = {M{\"u}ller, Patrick and Braun, Alexander}, title = {Local performance evaluation of AI-algorithms with the generalized spatial recall index}, series = {tm - Technisches Messen}, volume = {90}, journal = {tm - Technisches Messen}, number = {7-8}, publisher = {de Gruyter}, issn = {2196-7113}, doi = {10.1515/teme-2023-0013}, pages = {464 -- 477}, year = {2023}, language = {en} } @article{MuellerBraun2023, author = {M{\"u}ller, Patrick and Braun, Alexander}, title = {MTF as a performance indicator for AI algorithms?}, series = {Electronic Imaging: Society for Imaging Science and Technology}, volume = {35}, journal = {Electronic Imaging: Society for Imaging Science and Technology}, number = {16}, publisher = {Society for Imaging Sciences and Technology}, issn = {2470-1173}, doi = {10.2352/EI.2023.35.16.AVM-125}, pages = {1 -- 7}, year = {2023}, abstract = {Abstract The modulation-transfer function (MTF) is a fundamental optical metric to measure the optical quality of an imaging system. In the automotive industry it is used to qualify camera systems for ADAS/AD. Each modern ADAS/AD system includes evaluation algorithms for environment perception and decision making that are based on AI/ML methods and neural networks. The performance of these AI algorithms is measured by established metrics like Average Precision (AP) or precision-recall-curves. In this article we research the robustness of the link between the optical quality metric and the AI performance metric. A series of numerical experiments were performed with object detection and instance segmentation algorithms (cars, pedestrians) evaluated on image databases with varying optical quality. We demonstrate with these that for strong optical aberrations a distinct performance loss is apparent, but that for subtle optical quality differences - as might arise during production tolerances - this link does not exhibit a satisfactory correlation. This calls into question how reliable the current industry practice is where a produced camera is tested end-of-line (EOL) with the MTF, and fixed MTF thresholds are used to qualify the performance of the camera-under-test.}, language = {en} } @inproceedings{TischbeinFatemiWirtzetal.2023, author = {Tischbein, Franziska and Fatemi, Armin and Wirtz, Frank and Schmoger, Christin and Dorendorf, Stefan and Schurtz, Annika and Echternacht, David and Ulbig, Andreas}, title = {Development of Strategies for the Smartification of Low-Voltage Grids}, series = {ETG-Fb. 170: ETG Kongress 2023 : Die Energiewende beschleunigen, 25. - 26.05.2023 in Kasse}, volume = {ETG-Fachberichte 170}, booktitle = {ETG-Fb. 170: ETG Kongress 2023 : Die Energiewende beschleunigen, 25. - 26.05.2023 in Kasse}, publisher = {VDE}, address = {Berlin}, isbn = {978-3-8007-6108-1}, pages = {438 -- 444}, year = {2023}, language = {en} } @inproceedings{LangmannStiller2017, author = {Langmann, Reinhard and Stiller, Michael}, title = {Cloud-based industrial control services - The next generation PLC?}, series = {Online Engineering \& Internet of Things: Proceedings of the 14th International Conference on Remote Engineering and Virtual Instrumentation REV 2017, held 15-17 March 2017, Columbia University, New York, USA}, volume = {Lecture Notes in Networks and Systems : 22}, booktitle = {Online Engineering \& Internet of Things: Proceedings of the 14th International Conference on Remote Engineering and Virtual Instrumentation REV 2017, held 15-17 March 2017, Columbia University, New York, USA}, editor = {Auer, Michel E. and Zutin, Danilo G.}, publisher = {Springer Nature}, address = {Cham}, isbn = {978-3-319-64351-9}, issn = {2190-4111}, doi = {10.1007/978-3-319-64352-6_1}, pages = {3 -- 18}, year = {2017}, language = {en} } @article{SchwungYuwonoSchwungetal.2022, author = {Schwung, Dorothea and Yuwono, Steve and Schwung, Andreas and Ding, Steven X.}, title = {PLC-Informed Distributed Game Theoretic Learning of Energy-Optimal Production Policies}, series = {IEEE Transactions on Cybernetics}, journal = {IEEE Transactions on Cybernetics}, publisher = {IEEE}, issn = {2168-2267}, doi = {10.1109/TCYB.2022.3179950}, pages = {1 -- 14}, year = {2022}, language = {en} } @article{QuevalSoteloKharmizetal.2016, author = {Queval, Loic and Sotelo, Guilherme G. and Kharmiz, Yassin and Dias, Daniel H. N. and Sass, Felipe and Zermeno, Victor M. R. and Gottkehaskamp, Raimund}, title = {Optimization of the Superconducting Linear Magnetic Bearing of a Maglev Vehicle}, series = {IEEE Transactions on Applied Superconductivity}, volume = {26}, journal = {IEEE Transactions on Applied Superconductivity}, number = {3}, publisher = {IEEE}, issn = {1051-8223}, doi = {10.1109/TASC.2016.2528989}, year = {2016}, language = {en} } @article{LangmannMichael2019, author = {Langmann, Reinhard and Michael, Stiller}, title = {The PLC as a Smart Service in Industry 4.0 Production System}, series = {Applied Sciences}, volume = {9}, journal = {Applied Sciences}, number = {18}, publisher = {MDPI}, issn = {2076-3417}, doi = {10.3390/app9183815}, year = {2019}, language = {en} } @article{EchternachtLinnemannDreesetal.2013, author = {Echternacht, David and Linnemann, Christian and Drees, Tim and Breuer, Christopher and Moser, Albert}, title = {Wechselwirkungen zwischen Druckluftspeichern und Netzengp{\"a}ssen in zuk{\"u}nftigen Energiesystemen}, series = {Solarzeitalter : Politik, Kultur und {\"O}konomie erneuerbarer Energien}, volume = {25}, journal = {Solarzeitalter : Politik, Kultur und {\"O}konomie erneuerbarer Energien}, number = {1}, publisher = {EUROSOLAR Verl.}, organization = {EUROSOLAR Verl.}, pages = {54 -- 59}, year = {2013}, language = {de} } @inproceedings{BeckerLogesKippeltetal.2015, author = {Becker, Andreas and Loges, Hauke and Kippelt, Stefan and Gitis, Alexander and Merei, Ghada and Echternacht, David and M{\"u}ller, Marcus and Zeh, Alexander and Kleimaier, Martin and Leuthold, Matthias and Hesse, Holger C. and Beck, Hans-Peter and Engel, Bernd and Jossen, Andreas and Moser, Albert and Rehtanz, Christian and Sauer, Dirk-Uwe and Witzmann, Rolf}, title = {Electricity Storage Systems in Medium- and Low-Voltage Networks}, series = {Proceedings of International ETG Congress 2015: Die Energiewende - blueprints for the new energy age : date: 17-18 Nov. 2015}, booktitle = {Proceedings of International ETG Congress 2015: Die Energiewende - blueprints for the new energy age : date: 17-18 Nov. 2015}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {9783800741212}, pages = {151 -- 158}, year = {2015}, language = {en} } @inproceedings{BreuerDreesEchternachtetal.2012, author = {Breuer, Christopher and Drees, Tim and Echternacht, David and Linnemann, Christian and Moser, Albert}, title = {Identification of potentials and locations for power-to-gas in germany}, series = {6. EUROSOLAR-Konferenz "Stadtwerke mit erneuerbaren Energien", 21.-22. Juni 2012, Heidelberg}, booktitle = {6. EUROSOLAR-Konferenz "Stadtwerke mit erneuerbaren Energien", 21.-22. Juni 2012, Heidelberg}, publisher = {Eurosolar}, address = {Berlin}, isbn = {978-3-00-037648-1}, year = {2012}, language = {en} } @misc{BreuerDreesEchternachtetal.2012, author = {Breuer, Christopher and Drees, Tim and Echternacht, David and Linnemann, Christian and Moser, Albert}, title = {Standorte und Potenziale f{\"u}r Power-to-Gas}, series = {e|m|w}, journal = {e|m|w}, number = {4}, publisher = {Energate}, organization = {Energate}, year = {2012}, language = {de} } @inproceedings{BreuerEchternachtLinnemannetal.2011, author = {Breuer, Christopher and Echternacht, David and Linnemann, Christian and Moser, Albert}, title = {Technical and economic comparison of national and joint cross-border curative congestion management application}, series = {2011 8th International Conference on the European Energy Market (EEM), 25.05.2011 - 27.05.2011, Zagreb, Croatia}, booktitle = {2011 8th International Conference on the European Energy Market (EEM), 25.05.2011 - 27.05.2011, Zagreb, Croatia}, publisher = {IEEE}, isbn = {978-1-61284-285-1}, doi = {10.1109/EEM.2011.5952974}, pages = {33 -- 38}, year = {2011}, language = {en} } @misc{BreuerEchternachtLinnemannetal.2012, author = {Breuer, Christopher and Echternacht, David and Linnemann, Christian and Moser, Albert}, title = {Der Norden und der Osten brauchen Windgas}, series = {E 21-Magazin : Energie f{\"u}r morgen}, journal = {E 21-Magazin : Energie f{\"u}r morgen}, number = {2}, publisher = {Energate}, organization = {Energate}, pages = {46 -- 47}, year = {2012}, language = {de} } @book{BuchholzJerominAsgariehetal.2018, author = {Buchholz, B. and Jeromin, I. and Asgarieh, L. and Echternacht, David and Fan, M. and Repo, S. and Dedekind, K. and Ma, Z. and Gramme, E.}, title = {Asset management for distribution networks with high penetration of distributed energy resources}, address = {Cigr{\´e}}, year = {2018}, language = {en} } @phdthesis{Echternacht2015, author = {Echternacht, David}, title = {Optimierte Positionierung von Messtechnik zur Zustandssch{\"a}tzung in Verteilnetzen. Zugl.: Aachen, Techn. Hochsch., Diss., 2014}, series = {Aachener Beitr{\"a}ge zur Energieversorgung}, journal = {Aachener Beitr{\"a}ge zur Energieversorgung}, publisher = {Printproduction Wolff}, address = {Aachen}, isbn = {9783941704480}, year = {2015}, language = {de} } @misc{Echternacht2018, author = {Echternacht, David}, title = {Spitzenkappung erfordert intelligente Netzsteuerung}, series = {e|m|w}, journal = {e|m|w}, number = {2}, publisher = {Energate}, organization = {Energate}, year = {2018}, language = {de} } @inproceedings{EchternachtEickmannMoser2014, author = {Echternacht, David and Eickmann, Jonas and Moser, Albert}, title = {Quantifizierung des Nutzens von Smart Metern zur Zustandssch{\"a}tzung in der Verteilnetzebene}, series = {Innehalten und Ausblick: Effektivit{\"a}t und Effizienz f{\"u}r die Energiewende / 13. Symposium Energieinnovation, 12. - 14. Februar 2014, TU Graz}, booktitle = {Innehalten und Ausblick: Effektivit{\"a}t und Effizienz f{\"u}r die Energiewende / 13. Symposium Energieinnovation, 12. - 14. Februar 2014, TU Graz}, publisher = {TU Graz}, address = {Graz}, year = {2014}, language = {de} } @inproceedings{EchternachtFeilhauerFrankenetal.2015, author = {Echternacht, David and Feilhauer, Werner and Franken, Muriel and Geulen, Uwe and Moser, Albert and Schrieder, Werner and Zimmer, Peter}, title = {Smart Area Aachen - Zustandssch{\"a}tzung in Verteilnetzen}, series = {Von Smart Grids zu Smart Markets 2015 - Beitr{\"a}ge der ETG-Fachtagung 25.03.2015 - 26.03.2015 in Kassel, Deutschland}, booktitle = {Von Smart Grids zu Smart Markets 2015 - Beitr{\"a}ge der ETG-Fachtagung 25.03.2015 - 26.03.2015 in Kassel, Deutschland}, publisher = {ETG}, address = {Kassel}, year = {2015}, language = {de} } @inproceedings{EchternachtElHaouatiSchermulyetal.2018, author = {Echternacht, David and El Haouati, I. and Schermuly, Rainer and Meyer, F.}, title = {Simulating the impact of e-mobility charging infrastructure on urban low-voltage networks. Postersession}, series = {NEIS 2018: Conference on Sustainable Energy Supply and Energy Storage Systems. Hamburg, Deutschland, 20.09.-21.09.2018}, booktitle = {NEIS 2018: Conference on Sustainable Energy Supply and Energy Storage Systems. Hamburg, Deutschland, 20.09.-21.09.2018}, editor = {Schulz, Detlef}, publisher = {VDE}, address = {Frankfurt am Main; Piscataway, NJ}, isbn = {978-3-8007-4821-1}, pages = {208 -- 213}, year = {2018}, language = {en} } @inproceedings{EchternachtFellhauerGeulenetal.2013, author = {Echternacht, David and Fellhauer, W. and Geulen, Uwe and Schrieder, Werner and Zimmer, Peter}, title = {Smart Area Aachen - State Estimation in Distribution Grids}, series = {Worls Smart Grid Forum 2013, Berlin, 23-25 September 2013}, booktitle = {Worls Smart Grid Forum 2013, Berlin, 23-25 September 2013}, address = {Berlin}, pages = {1 -- 6}, year = {2013}, language = {en} } @inproceedings{EchternachtFrankenMoseretal.2015, author = {Echternacht, David and Franken, Muriel and Moser, Albert and Geulen, Uwe and Zimmer, Peter and Feilhauer, Werner and Schrieder, W.}, title = {Smart Area Aachen - in field test of meter placement and state estimation algorithms for distribution grids}, series = {2015 IEEE PES Innovative Smart Grid Technologies Latin America (ISGT LATAM), 05.10.2015 - 07.10.2015, Montevideo}, booktitle = {2015 IEEE PES Innovative Smart Grid Technologies Latin America (ISGT LATAM), 05.10.2015 - 07.10.2015, Montevideo}, publisher = {IEEE}, isbn = {978-1-4673-6605-2}, doi = {10.1109/ISGT-LA.2015.7381194}, pages = {435 -- 439}, year = {2015}, language = {en} } @inproceedings{EchternachtHeubergerBreueretal.2013, author = {Echternacht, David and Heuberger, Daniel and Breuer, Christopher and Linnemann, Christian and Moser, Albert}, title = {Advantageous positions for HVDC terminals in Europe}, series = {2013 IEEE Energytech, 21.05.2013 - 23.05.2013, Cleveland}, booktitle = {2013 IEEE Energytech, 21.05.2013 - 23.05.2013, Cleveland}, publisher = {IEEE}, isbn = {978-1-4673-4444-9}, doi = {10.1109/EnergyTech.2013.6645291}, pages = {1 -- 5}, year = {2013}, language = {en} } @inproceedings{EchternachtKleimaierMoser2013, author = {Echternacht, David and Kleimaier, Martin and Moser, Albert}, title = {Kostenoptimale Positionierung von Messtechnik zur Zustandssch{\"a}tzung in der Verteilnetzebene unter Ber{\"u}cksichtigung stochastisch abh{\"a}ngiger Messfehler}, series = {Internationaler ETG-Kongress 2013 - Energieversorgung auf dem Weg nach 2050 - Symposium 1: Security in Critical Infrastructures Today 11/05/2013 - 11/06/2013, Berlin}, booktitle = {Internationaler ETG-Kongress 2013 - Energieversorgung auf dem Weg nach 2050 - Symposium 1: Security in Critical Infrastructures Today 11/05/2013 - 11/06/2013, Berlin}, publisher = {VDE}, address = {Berlin}, pages = {1 -- 8}, year = {2013}, language = {de} } @inproceedings{EchternachtLinnemannDreesetal.2012, author = {Echternacht, David and Linnemann, Christian and Drees, Tim and Breuer, Christopher and Moser, Albert}, title = {Large-Scale Storage Technologies in the Context of future German Transmission Grid Congestions}, series = {7th International Renewable Energy Storage Conference, 12.11.-14.11.2012, Berlin}, booktitle = {7th International Renewable Energy Storage Conference, 12.11.-14.11.2012, Berlin}, editor = {EUROSOLAR and the World Council for Renewable Energy,}, address = {Berlin}, year = {2012}, language = {en} } @inproceedings{EchternachtLinnemannMoser2012, author = {Echternacht, David and Linnemann, Christian and Moser, Albert}, title = {Optimized positioning of measurements in distribution grids}, series = {2012 3rd IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe), 14.10.2012 - 17.10.2012, Berlin}, booktitle = {2012 3rd IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe), 14.10.2012 - 17.10.2012, Berlin}, publisher = {IEEE}, isbn = {978-1-4673-2597-4}, doi = {10.1109/ISGTEurope.2012.6465628}, pages = {1 -- 7}, year = {2012}, language = {en} } @book{EchternachtMoser2013, author = {Echternacht, David and Moser, Albert}, title = {Cost optimal meter placement in low and medium voltagte grids considering stochastic dependencies}, series = {IEEE PES ISGT Europe 2013, 06.10.2013 - 09.10.2013, Lyngby}, journal = {IEEE PES ISGT Europe 2013, 06.10.2013 - 09.10.2013, Lyngby}, publisher = {IEEE}, isbn = {978-1-4799-2984-9}, doi = {10.1109/ISGTEurope.2013.6695335}, pages = {1 -- 5}, year = {2013}, language = {en} } @inproceedings{EchternachtNeuselLangeSchermulyetal.2017, author = {Echternacht, David and Neusel-Lange, N. and Schermuly, Rainer and Meyer, F.}, title = {Target Network Planning and Asset Condition Assessment as Basis for an integrated Asset Management Approach}, series = {ETG Congress 2017, Bonn, 28.11.-29.11.2017}, booktitle = {ETG Congress 2017, Bonn, 28.11.-29.11.2017}, address = {Bonn}, year = {2017}, language = {en} } @inproceedings{EchternachtSchermuly2019, author = {Echternacht, David and Schermuly, Rainer}, title = {Simulation der Auswirkungen privater Ladeinfrastruktur auf Niederspannungsnetze}, series = {Anlagentechnik 2020}, booktitle = {Anlagentechnik 2020}, editor = {Cichowski, Rolf R{\"u}diger}, edition = {Neuerscheinung}, publisher = {VDE Verlag}, address = {Berlin}, isbn = {978-3-8007-4838-9}, pages = {149 -- 158}, year = {2019}, language = {de} } @inproceedings{EchternachtSchultze2018, author = {Echternacht, David and Schultze, Nico}, title = {Integriertes Asset Management als Basis einer Energiewendegerechten Instandhaltungs- und Investitionsstrategie}, series = {Anlagentechnik 2018: Anlagentechnik f{\"u}r elektrische Verteilungsnetze}, volume = {Anlagentechnik f{\"u}r elektrische Verteilungsnetze}, booktitle = {Anlagentechnik 2018: Anlagentechnik f{\"u}r elektrische Verteilungsnetze}, editor = {Cichowski, Rolf R{\"u}diger}, publisher = {EW Medien und Kongresse}, address = {Frankfurt am Main}, isbn = {9783802211669}, pages = {167 -- 173}, year = {2018}, language = {de} } @inproceedings{EchternachtStaggePriebeetal.2015, author = {Echternacht, David and Stagge, Hanno and Priebe, Jens and Wiernes, Pablo Ezequiel and Jagielski, Kai and Petri, Anne-Kathrin and Drießen, Sarah and Trevisan, Bianka and Digmayer, Claas and Oberst, Christian A. and Keysselitz, B{\"a}rbel and Kremer, Martin and Sieber, Sandra and Krapp, Stefan and Jakobs, Eva-Maria and Frenz, Martin and Lohrberg, Frank and Wachten, Kunibert and Moser, Albert}, title = {Modelling, Planning, Design and Evaluation of DC-Distribution Grids}, series = {International ETG Congress 2015 : die Energiewende ; blueprints for the new energy age ; proceedings ; November 17 - 18, 2015, World Conference Center, Bonn}, booktitle = {International ETG Congress 2015 : die Energiewende ; blueprints for the new energy age ; proceedings ; November 17 - 18, 2015, World Conference Center, Bonn}, publisher = {VDE-Verl.}, address = {Bonn}, pages = {289 -- 295}, year = {2015}, language = {en} } @inproceedings{GitisSauerMoseretal.2014, author = {Gitis, Alexander and Sauer, Dirk-Uwe and Moser, Albert and Echternacht, David and Kleimaier, Martin and Becker, Andreas and Aundrup, Thomas and Berthold, Andreas and Pokojski, Martin and Leuthold, Matthias and Rotering, Niklas}, title = {Dezentrale Energiespeicher: Einsatzm{\"o}glichkeiten, Bedarf und Wirtschaftlichkeit}, series = {VDE-Kongress 2014 - Smart Cities - Intelligente L{\"o}sungen f{\"u}r das Leben in der Zukunft 20.10.2014 - 21.10.2014 in Frankfurt am Main}, booktitle = {VDE-Kongress 2014 - Smart Cities - Intelligente L{\"o}sungen f{\"u}r das Leben in der Zukunft 20.10.2014 - 21.10.2014 in Frankfurt am Main}, publisher = {VDE}, address = {Frankfurt am Main}, pages = {1 -- 6}, year = {2014}, language = {de} } @inproceedings{KippeltRehtanzGitisetal.2015, author = {Kippelt, Stefan and Rehtanz, Christian and Gitis, Alexander Mihailovic and Leuthold, Matthias and Sauer, Dirk Uwe and Echternacht, David and Rotering, Niklas and Moser, Albert and Kleimaier, Martin and Loges, Hauke and Becker, Andreas and Aundrup, Thomas and Berthold, Andreas and Pokojski, Martin}, title = {Dezentrale Energiespeicher: Studie zu Stromspeichern in der Nieder- und Mittelspannungsebene}, series = {Von Smart Grids zu Smart Markets 2015 - Beitr{\"a}ge der ETG-Fachtagung 25.03.2015 - 26.03.2015 in Kassel, Deutschland}, booktitle = {Von Smart Grids zu Smart Markets 2015 - Beitr{\"a}ge der ETG-Fachtagung 25.03.2015 - 26.03.2015 in Kassel, Deutschland}, publisher = {ETG}, address = {Kassel}, year = {2015}, language = {de} } @inproceedings{LinnemannEchternachtBreueretal.2012, author = {Linnemann, Christian and Echternacht, David and Breuer, Christopher and Heuberger, Daniel and Moser, Albert}, title = {Ermittlung vorteilhafter HG{\"U}-Anschlussknoten}, series = {Smart Grid: Intelligente Energieversorgung der Zukunft ; Kongressbeit{\"a}ge ; 5. - 6. November 2012, Internationales Congresscenter Stuttgart (ICS)}, booktitle = {Smart Grid: Intelligente Energieversorgung der Zukunft ; Kongressbeit{\"a}ge ; 5. - 6. November 2012, Internationales Congresscenter Stuttgart (ICS)}, publisher = {VDE-Verl.}, address = {Berlin}, isbn = {978-3-8007-3446-7}, year = {2012}, language = {de} } @inproceedings{LinnemannEchternachtBreueretal.2011, author = {Linnemann, Christian and Echternacht, David and Breuer, Christopher and Moser, Albert}, title = {Modeling optimal redispatch for the European Transmission grid}, series = {2011 IEEE Trondheim PowerTech,19.06.2011 - 23.06.2011, Trondheim}, booktitle = {2011 IEEE Trondheim PowerTech,19.06.2011 - 23.06.2011, Trondheim}, publisher = {IEEE}, isbn = {978-1-4244-8418-8}, doi = {10.1109/PTC.2011.6019442}, pages = {1 -- 8}, year = {2011}, language = {en} } @inproceedings{NemeSeefeldtGottsteinetal.2014, author = {Neme, Christopher and Seefeldt, Friedrich and Gottstein, Meg and Echternacht, David and Moser, Albert and Weston, Frederick}, title = {The Positive Effects of Energy Efficiency on the German Electricity Sector: Peer-reviewed paper presented at IEPPEC 2014 International Energy Policies \& Programmes Evaluation Conference}, series = {15. International Energy Policies \& Programmes Evaluation Conference (IEPEC), Berlin, Deutschland, 09.09-11.09.2014}, booktitle = {15. International Energy Policies \& Programmes Evaluation Conference (IEPEC), Berlin, Deutschland, 09.09-11.09.2014}, address = {Berlin}, pages = {1 -- 16}, year = {2014}, language = {en} } @article{Braun2022, author = {Braun, Alexander}, title = {Automotive mass production of camera systems: Linking image quality to AI performance}, series = {tm - Technisches Messen}, journal = {tm - Technisches Messen}, publisher = {Walter de Gruyter}, issn = {2196-7113}, doi = {10.1515/teme-2022-0029}, year = {2022}, abstract = {Artificial intelligence methods based on machine learning or artificial neural networks have become indispensable in camera-based driver assistance systems, and also represent an essential building block for future autonomous driving. However, the great successes of these evaluation methods in environment perception and also driving planning are accompanied by equally great challenges in the validation and verification of these systems. One of the essential aspects for this is the required guaranteed safety of the functions under mass production conditions of the vehicles. This article explains this point of view using a detailed example from the field of camera-based driver assistance systems: the determination of inspection limits at the end of the production line. The camera is one of the most important sensor modalities for vehicle environment sensing and as such, the quality of the camera systems plays a key role in the safety argumentation of the overall system. Several illustrative application examples (role of simulations, calibration, influence of the windshield) will be presented. The basic ideas presented can be well transferred to the other sensor modalities (lidar, radar, ToF, etc.). The investigations/evidence show that doubts are allowed whether or how fast autonomous driving on level L4/5 will take hold as robotaxis or - even more challenging - in private ownership on a larger scale.}, language = {en} } @inproceedings{BalzerHannemannWunderlichetal.2005, author = {Balzer, Chr. and Hannemann, Th. and Wunderlich, Chr. and Braun, Alexander and Ettler, M. and Paape, Chr. and Neuhauser, W.}, title = {Efficient photoionisation, preparation and coherent manipulation of trapped /sup 171/Yb/sup +/-ions}, series = {EQEC '05. European Quantum Electronics Conference, 12-17 June 2005, Munich}, booktitle = {EQEC '05. European Quantum Electronics Conference, 12-17 June 2005, Munich}, publisher = {IEEE}, isbn = {0-7803-8973-5}, doi = {10.1109/EQEC.2005.1567474}, pages = {308}, year = {2005}, language = {en} } @phdthesis{Braun2007, author = {Braun, Alexander}, title = {Addressing Single Yb+ Ions: A new scheme for quantum computing in linear ion traps}, publisher = {Cuvillier Verlag}, address = {G{\"o}ttingen}, isbn = {978-3-86727-276-6}, pages = {169}, year = {2007}, language = {en} } @article{WittpahlZakourLehmannetal.2018, author = {Wittpahl, Christian and Zakour, Hatem Ben and Lehmann, Matthias and Braun, Alexander}, title = {Realistic Image Degradation with Measured PSF}, series = {Electronic Imaging, Autonomous Vehicles and Machines 2018}, journal = {Electronic Imaging, Autonomous Vehicles and Machines 2018}, number = {17}, publisher = {Society for Imaging Science and Technology}, issn = {2470-1173}, doi = {10.2352/ISSN.2470-1173.2018.17.AVM-149}, pages = {149}, year = {2018}, language = {en} } @article{TsengMoslehMannanetal.2021, author = {Tseng, Ethan and Mosleh, Ali and Mannan, Fahim and St-Arnaud, Karl and Sharma, Avinash and Peng, Yifan and Braun, Alexander and Nowrouzezahrai, Derek and Lalonde, Jean-Fran{\c{c}}ois and Heide, Felix}, title = {Differentiable Compound Optics and Processing Pipeline Optimization for End-to-end Camera Design}, series = {ACM Transactions on Graphics}, volume = {40}, journal = {ACM Transactions on Graphics}, number = {2}, publisher = {Association for Computing Machinery}, address = {New York, NY, USA}, issn = {1557-7368}, doi = {10.1145/3446791}, pages = {1 -- 19}, year = {2021}, abstract = {Most modern commodity imaging systems we use directly for photography--or indirectly rely on for downstream applications--employ optical systems of multiple lenses that must balance deviations from perfect optics, manufacturing constraints, tolerances, cost, and footprint. Although optical designs often have complex interactions with downstream image processing or analysis tasks, today's compound optics are designed in isolation from these interactions. Existing optical design tools aim to minimize optical aberrations, such as deviations from Gauss' linear model of optics, instead of application-specific losses, precluding joint optimization with hardware image signal processing (ISP) and highly parameterized neural network processing. In this article, we propose an optimization method for compound optics that lifts these limitations. We optimize entire lens systems jointly with hardware and software image processing pipelines, downstream neural network processing, and application-specific end-to-end losses. To this end, we propose a learned, differentiable forward model for compound optics and an alternating proximal optimization method that handles function compositions with highly varying parameter dimensions for optics, hardware ISP, and neural nets. Our method integrates seamlessly atop existing optical design tools, such as Zemax. We can thus assess our method across many camera system designs and end-to-end applications. We validate our approach in an automotive camera optics setting--together with hardware ISP post processing and detection--outperforming classical optics designs for automotive object detection and traffic light state detection. For human viewing tasks, we optimize optics and processing pipelines for dynamic outdoor scenarios and dynamic low-light imaging. We outperform existing compartmentalized design or fine-tuning methods qualitatively and quantitatively, across all domain-specific applications tested.}, language = {en} }