@article{EngemannCoenenDawaretal.2021,
  author    = {Engemann, Heiko and C{\"o}nen, Patrick and Dawar, Harshal and Du, Shengzhi and Kallweit, Stephan},
  title     = {A robot-assisted large-scale inspection of wind turbine blades in manufacturing using an autonomous mobile manipulator},
  series = {Applied Sciences},
  volume    = {11},
  journal   = {Applied Sciences},
  number    = {19},
  publisher = {MDPI},
  address   = {Basel},
  issn      = {2076-3417},
  doi       = {10.3390/app11199271},
  pages     = {1 -- 22},
  year      = {2021},
  abstract  = {Wind energy represents the dominant share of renewable energies. The rotor blades of a wind turbine are typically made from composite material, which withstands high forces during rotation. The huge dimensions of the rotor blades complicate the inspection processes in manufacturing. The automation of inspection processes has a great potential to increase the overall productivity and to create a consistent reliable database for each individual rotor blade. The focus of this paper is set on the process of rotor blade inspection automation by utilizing an autonomous mobile manipulator. The main innovations include a novel path planning strategy for zone-based navigation, which enables an intuitive right-hand or left-hand driving behavior in a shared human-robot workspace. In addition, we introduce a new method for surface orthogonal motion planning in connection with large-scale structures. An overall execution strategy controls the navigation and manipulation processes of the long-running inspection task. The implemented concepts are evaluated in simulation and applied in a real-use case including the tip of a rotor blade form.},
  language  = {en}
}
@article{Golland2020,
  author    = {Golland, Alexander},
  title     = {Datenschutzrechtliche Fragen personalisierter Preise — Herausforderungen von Algorithmen im Schnittbereich von Ethik, {\"O}konomie und Datenschutz},
  series = {CR Computer und Recht},
  volume    = {36},
  journal   = {CR Computer und Recht},
  number    = {3},
  publisher = {Verlag Dr. Otto Schmidt},
  address   = {K{\"o}ln},
  isbn      = {2194-4172},
  doi       = {10.9785/cr-2020-360313},
  pages     = {186 -- 194},
  year      = {2020},
  language  = {de}
}
@inproceedings{NikolovskiRekeElsenetal.2021,
  author    = {Nikolovski, Gjorgji and Reke, Michael and Elsen, Ingo and Schiffer, Stefan},
  title     = {Machine learning based 3D object detection for navigation in unstructured environments},
  series = {2021 IEEE Intelligent Vehicles Symposium Workshops (IV Workshops)},
  booktitle = {2021 IEEE Intelligent Vehicles Symposium Workshops (IV Workshops)},
  publisher = {IEEE},
  isbn      = {978-1-6654-7921-9},
  doi       = {10.1109/IVWorkshops54471.2021.9669218},
  pages     = {236 -- 242},
  year      = {2021},
  abstract  = {In this paper we investigate the use of deep neural networks for 3D object detection in uncommon, unstructured environments such as in an open-pit mine. While neural nets are frequently used for object detection in regular autonomous driving applications, more unusual driving scenarios aside street traffic pose additional challenges. For one, the collection of appropriate data sets to train the networks is an issue. For another, testing the performance of trained networks often requires tailored integration with the particular domain as well. While there exist different solutions for these problems in regular autonomous driving, there are only very few approaches that work for special domains just as well. We address both the challenges above in this work. First, we discuss two possible ways of acquiring data for training and evaluation. That is, we evaluate a semi-automated annotation of recorded LIDAR data and we examine synthetic data generation. Using these datasets we train and test different deep neural network for the task of object detection. Second, we propose a possible integration of a ROS2 detector module for an autonomous driving platform. Finally, we present the performance of three state-of-the-art deep neural networks in the domain of 3D object detection on a synthetic dataset and a smaller one containing a characteristic object from an open-pit mine.},
  language  = {en}
}
@inproceedings{HauggKreyerKemperetal.2020,
  author    = {Haugg, Albert Thomas and Kreyer, J{\"o}rg and Kemper, Hans and Hatesuer, Katerina and Esch, Thomas},
  title     = {Heat exchanger for ORC. adaptability and optimisation potentials},
  series = {IIR International Rankine 2020 Conference},
  booktitle = {IIR International Rankine 2020 Conference},
  doi       = {10.18462/iir.rankine.2020.1224},
  pages     = {10 Seiten},
  year      = {2020},
  abstract  = {The recovery of waste heat requires heat exchangers to extract it from a liquid or gaseous medium into another working medium, a refrigerant. In Organic Rankine Cycles (ORC) on Combustion Engines there are two major heat sources, the exhaust gas and the water/glycol fluid from the engine's cooling circuit. A heat exchanger design must be adapted to the different requirements and conditions resulting from the heat sources, fluids, system configurations, geometric restrictions, and etcetera. The Stacked Shell Cooler (SSC) is a new and very specific design of a plate heat exchanger, created by AKG, which allows with a maximum degree of freedom the optimization of heat exchange rate and the reduction of the related pressure drop. This optimization in heat exchanger design for ORC systems is even more important, because it reduces the energy consumption of the system and therefore maximizes the increase in overall efficiency of the engine.},
  language  = {en}
}
@inproceedings{SchaenzleAltherrEdereretal.2015,
  author    = {Sch{\"a}nzle, Christian and Altherr, Lena and Ederer, Thorsten and Pelz, Peter},
  title     = {TOR - Towards the energetically optimal ventilation system},
  pages     = {1 Seite},
  year      = {2015},
  language  = {en}
}
@inproceedings{LorenzAltherrPelz2020,
  author    = {Lorenz, Imke-Sophie and Altherr, Lena and Pelz, Peter F.},
  title     = {Resilience enhancement of critical infrastructure - graph-theoretical resilience analysis of the water distribution system in the German city of Darmstadt},
  series = {14th WCEAM Proceedings},
  booktitle = {14th WCEAM Proceedings},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-64228-0},
  doi       = {10.1007/978-3-030-64228-0_13},
  pages     = {137 -- 149},
  year      = {2020},
  abstract  = {Water suppliers are faced with the great challenge of achieving high-quality and, at the same time, low-cost water supply. Since climatic and demographic influences will pose further challenges in the future, the resilience enhancement of water distribution systems (WDS), i.e. the enhancement of their capability to withstand and recover from disturbances, has been in particular focus recently. To assess the resilience of WDS, graph-theoretical metrics have been proposed. In this study, a promising approach is first physically derived analytically and then applied to assess the resilience of the WDS for a district in a major German City. The topology based resilience index computed for every consumer node takes into consideration the resistance of the best supply path as well as alternative supply paths. This resistance of a supply path is derived to be the dimensionless pressure loss in the pipes making up the path. The conducted analysis of a present WDS provides insight into the process of actively influencing the resilience of WDS locally and globally by adding pipes. The study shows that especially pipes added close to the reservoirs and main branching points in the WDS result in a high resilience enhancement of the overall WDS.},
  language  = {en}
}
@article{Golland2020,
  author    = {Golland, Alexander},
  title     = {Verantwortlichkeit, Data Breach, das Ende von Fax \& E-Mail: Aufsichtsbeh{\"o}rden mit streitbaren Thesen},
  series = {DSB Datenschutz-Berater},
  volume    = {44},
  journal   = {DSB Datenschutz-Berater},
  number    = {4},
  publisher = {DFV Mediengruppe},
  address   = {Frankfurt a.M.},
  isbn      = {0170-7256},
  pages     = {98 -- 100},
  year      = {2020},
  language  = {de}
}
@article{Golland2020,
  author    = {Golland, Alexander},
  title     = {EDPB: Europ{\"a}ische Aufsichtsbeh{\"o}rden mit neuen Guidelines zur datenschutzkonformen Einwilligung},
  series = {DSB Datenschutz-Berater},
  volume    = {44},
  journal   = {DSB Datenschutz-Berater},
  number    = {6},
  publisher = {DFV Mediengruppe},
  address   = {Frankfurt a.M.},
  isbn      = {0170-7256},
  pages     = {151 -- 153},
  year      = {2020},
  language  = {de}
}
@incollection{LeiseAltherr2021,
  author    = {Leise, Philipp and Altherr, Lena},
  title     = {Experimental evaluation of resilience metrics in a fluid system},
  series = {Mastering Uncertainty in Mechanical Engineering},
  booktitle = {Mastering Uncertainty in Mechanical Engineering},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-78356-3},
  pages     = {442 -- 447},
  year      = {2021},
  language  = {en}
}
@incollection{AltherrLeisePfetschetal.2021,
  author    = {Altherr, Lena and Leise, Philipp and Pfetsch, Marc E. and Schmitt, Andreas},
  title     = {Optimal design of resilient technical systems on the example of water supply systems},
  series = {Mastering Uncertainty in Mechanical Engineering},
  booktitle = {Mastering Uncertainty in Mechanical Engineering},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-78356-3},
  pages     = {429 -- 433},
  year      = {2021},
  language  = {en}
}
@incollection{AltherrLeise2021,
  author    = {Altherr, Lena and Leise, Philipp},
  title     = {Resilience as a concept for mastering uncertainty},
  series = {Mastering Uncertainty in Mechanical Engineering},
  booktitle = {Mastering Uncertainty in Mechanical Engineering},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-78353-2},
  doi       = {10.1007/978-3-030-78354-9},
  pages     = {412 -- 417},
  year      = {2021},
  language  = {en}
}
@article{Golland2020,
  author    = {Golland, Alexander},
  title     = {Weckruf f{\"u}r deutsche Großunternehmen? - Der neue Entwurf des IT-Sicherheitsgesetz 2.0},
  series = {K\&R Kommunikation \& Recht},
  volume    = {23},
  journal   = {K\&R Kommunikation \& Recht},
  number    = {7-8},
  publisher = {DFV Mediengruppe},
  address   = {Frankfurt a.M.},
  isbn      = {1434-6354},
  pages     = {I},
  year      = {2020},
  language  = {de}
}
@article{Golland2020,
  author    = {Golland, Alexander},
  title     = {Die „private" Datenverarbeitung im Internet. Verantwortlichkeiten und Rechtm{\"a}ßigkeit bei Nutzung von Plattformdiensten durch nat{\"u}rliche Personen},
  series = {ZD Zeitschrift f{\"u}r Datenschutz},
  volume    = {10},
  journal   = {ZD Zeitschrift f{\"u}r Datenschutz},
  number    = {8},
  editor    = {Hoeren, Thomas and Schneider, Jochen and Selmayr, Martin and Spies, Axel and Wybitul, Tim},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  isbn      = {2192-5593},
  pages     = {397 -- 403},
  year      = {2020},
  language  = {de}
}
@incollection{Golland2020,
  author    = {Golland, Alexander},
  title     = {Struggling with users' consent: Economic approach to solve the issue of coupling},
  series = {Turning Point in Data Protection Law},
  booktitle = {Turning Point in Data Protection Law},
  publisher = {Nomos},
  address   = {Baden-Baden},
  isbn      = {978-3-8487-6909-4},
  doi       = {10.5771/9783748921561-121},
  pages     = {121 -- 126},
  year      = {2020},
  language  = {en}
}
@incollection{GollandOhrtmann2020,
  author    = {Golland, Alexander and Ohrtmann, Jan-Peter},
  title     = {Video surveillance: The supervisory authorities' view andrecent case law},
  series = {Turning Point in Data Protection Law},
  booktitle = {Turning Point in Data Protection Law},
  publisher = {Nomos},
  address   = {Baden-Baden},
  isbn      = {978-3-8487-6909-4},
  doi       = {10.5771/9783748921561-175},
  pages     = {175 -- 178},
  year      = {2020},
  language  = {en}
}
@article{Golland2020,
  author    = {Golland, Alexander},
  title     = {Die Zukunft internationaler Datentransfers: Quo vadis?},
  year      = {2020},
  abstract  = {Nach dem Scheitern des Privacy Shield hofft der Datenschutzberater Alexander Golland, dass die europ{\"a}ischen Beh{\"o}rden bald konkrete Maßnahmen f{\"u}r den Datentransfer in Drittl{\"a}nder vorschlagen. Auch kleine Unternehmen m{\"u}ssten die Herausforderung bew{\"a}ltigen - sonst w{\"a}re das Urteil nur Wasser auf die M{\"u}hlen jener, die ohnehin {\"u}ber den Datenschutz schimpfen.},
  language  = {de}
}
@article{Golland2021,
  author    = {Golland, Alexander},
  title     = {Datenschutzkonforme Test-, Impf- und Genesungskontrollen in Betrieben der Privatwirtschaft},
  series = {DSB Datenschutz-Berater},
  volume    = {45},
  journal   = {DSB Datenschutz-Berater},
  number    = {5},
  publisher = {DFV Mediengruppe},
  address   = {Frankfurt a.M.},
  issn      = {0170-7256},
  pages     = {158 -- 160},
  year      = {2021},
  language  = {de}
}
@article{Golland2021,
  author    = {Golland, Alexander},
  title     = {Cookies \& Co. - trotz neuem Gesetz alte Probleme f{\"u}r Website-Betreiber. Anpassung des deutschen Rechts durch das TTDSG an unionsrechtliche Vorgaben zum 1.12.2021},
  series = {NWB Steuer- und Wirtschaftsrecht},
  volume    = {2021},
  journal   = {NWB Steuer- und Wirtschaftsrecht},
  number    = {25},
  publisher = {NWB-Verlag},
  address   = {Herne},
  issn      = {0028-3460},
  pages     = {1818 -- 1825},
  year      = {2021},
  language  = {de}
}
@article{Golland2021,
  author    = {Golland, Alexander},
  title     = {Neuregelungen zum Datenschutz: Ein Update f{\"u}r Website-Betreiber. Reform des Telekommunikations- und Telemedienrechts verabschiedet},
  series = {NWB Rechnungswesen - BBK},
  journal   = {NWB Rechnungswesen - BBK},
  number    = {14},
  isbn      = {0340-9848},
  pages     = {672 -- 674},
  year      = {2021},
  language  = {de}
}
@article{Golland2021,
  author    = {Golland, Alexander},
  title     = {Anforderungen an Transfer Impact Assessments bei Datentransfers in unsichere Drittl{\"a}nder},
  series = {DSB Datenschutz-Berater},
  volume    = {45},
  journal   = {DSB Datenschutz-Berater},
  number    = {7-8},
  publisher = {DFV Mediengruppe},
  address   = {Frankfurt a.M.},
  isbn      = {0170-7256},
  pages     = {229 -- 231},
  year      = {2021},
  language  = {de}
}
@masterthesis{Vu2022,
  type      = {Bachelor Thesis},
  author    = {Vu, Tuan Dat},
  title     = {Objekterkennung und Schienenerkennung in der Schienenfahrzeugtechnik},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {72 Seiten},
  year      = {2022},
  language  = {de}
}
@misc{Nordmann2022,
  type      = {Master Thesis},
  author    = {Nordmann, Alexander},
  title     = {Prozess{\"u}berwachung beim Werkzeugschleifen von WC-Co Hartmetallschaftfr{\"a}sern},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {xi, 54 Seiten},
  year      = {2022},
  language  = {de}
}
@article{Golland2021,
  author    = {Golland, Alexander},
  title     = {Das Telekommunikation-Telemedien-Datenschutzgesetz. Cookies und PIMS als Herausforderungen f{\"u}r Website-Betreiber},
  series = {NJW Neue Juristische Wochenschrift},
  journal   = {NJW Neue Juristische Wochenschrift},
  number    = {31},
  editor    = {Ewer, Wolfgang and Hamm, Rainer and Karpenstein, Ulrich and Oberth{\"u}r, Nathalie and Herchen, Hilke and Br{\"a}utigam, Peter},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  issn      = {0341-1915},
  pages     = {2238 -- 2243},
  year      = {2021},
  language  = {de}
}
@misc{Golland2019,
  author    = {Golland, Alexander},
  title     = {Das „Recht auf Vergessenwerden" unter Geltung der DSGVO: Anwendungsbereich und Rechtm{\"a}ßigkeit},
  series = {DSB Datenschutz-Berater},
  volume    = {43},
  journal   = {DSB Datenschutz-Berater},
  number    = {10},
  publisher = {DFV Mediengruppe},
  address   = {Frankfurt a.M.},
  issn      = {0170-7256},
  pages     = {234 -- 236},
  year      = {2019},
  language  = {de}
}
@misc{Golland2019,
  author    = {Golland, Alexander},
  title     = {Das „Recht auf Vergessenwerden" unter Geltung der DSGVO: Rechtm{\"a}ßigkeit der Anzeige sensibler Daten},
  series = {DSB Datenschutz-Berater},
  journal   = {DSB Datenschutz-Berater},
  number    = {11},
  publisher = {DFV Mediengruppe},
  address   = {Frankfurt a.M.},
  issn      = {0170-7256},
  pages     = {262 -- 264},
  year      = {2019},
  language  = {de}
}
@article{Golland2020,
  author    = {Golland, Alexander},
  title     = {Datenschutzrechtliche Anforderungen an internationale Datentransfers},
  series = {NJW - Neue Juristische Wochenschrift},
  volume    = {2020},
  journal   = {NJW - Neue Juristische Wochenschrift},
  number    = {36},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  issn      = {0341-1915},
  pages     = {2593 -- 2596},
  year      = {2020},
  language  = {de}
}
@misc{Golland2020,
  author    = {Golland, Alexander},
  title     = {Anspruch gegen einen Suchmaschinenbetreiber auf L{\"o}schung von Suchergebnissen},
  series = {ZD Zeitschrift f{\"u}r Datenschutz},
  volume    = {2020},
  journal   = {ZD Zeitschrift f{\"u}r Datenschutz},
  number    = {10},
  publisher = {Beck},
  address   = {M{\"u}nchen},
  issn      = {2192-5593},
  pages     = {531 -- 532},
  year      = {2020},
  language  = {de}
}
@misc{Golland2020,
  author    = {Golland, Alexander},
  title     = {Immaterieller Schadensersatz f{\"u}r die Weiterleitung von Daten {\"u}ber ein berufsbezogenes soziales Netzwerk},
  series = {DSB Datenschutz-Berater},
  volume    = {44},
  journal   = {DSB Datenschutz-Berater},
  number    = {11},
  publisher = {DFV Mediengruppe},
  address   = {Frankfurt a.M.},
  issn      = {0170-7256},
  pages     = {286 -- 288},
  year      = {2020},
  language  = {de}
}
@article{Golland2022,
  author    = {Golland, Alexander},
  title     = {Aufsicht und Rechtsdurchsetzung bei unzul{\"a}ssigem Einsatz von Cookies \& Co. unter Geltung des TTDSG},
  series = {DSB Datenschutz-Berater},
  volume    = {46},
  journal   = {DSB Datenschutz-Berater},
  number    = {1},
  publisher = {DFV Mediengruppe},
  address   = {Frankfurt a.M.},
  isbn      = {0170-7256},
  pages     = {14 -- 16},
  year      = {2022},
  language  = {de}
}
@article{PoettgenEdererAltherretal.2015,
  author    = {P{\"o}ttgen, Philipp and Ederer, Thorsten and Altherr, Lena and Pelz, Peter F.},
  title     = {Developing a control strategy for booster stations under uncertain load},
  series = {Applied Mechanics and Materials},
  volume    = {807},
  journal   = {Applied Mechanics and Materials},
  number    = {807},
  publisher = {Trans Tech Publications},
  address   = {B{\"a}ch},
  isbn      = {1662-7482},
  doi       = {10.4028/www.scientific.net/AMM.807.241},
  pages     = {241 -- 246},
  year      = {2015},
  abstract  = {Booster stations can fulfill a varying pressure demand with high energy-efficiency, because individual pumps can be deactivated at smaller loads. Although this is a seemingly simple approach, it is not easy to decide precisely when to activate or deactivate pumps. Contemporary activation controls derive the switching points from the current volume flow through the system. However, it is not measured directly for various reasons. Instead, the controller estimates the flow based on other system properties. This causes further uncertainty for the switching decision. In this paper, we present a method to find a robust, yet energy-efficient activation strategy.},
  language  = {en}
}
@article{AltherrEdererPoettgenetal.2015,
  author    = {Altherr, Lena and Ederer, Thorsten and P{\"o}ttgen, Philipp and Lorenz, Ulf and Pelz, Peter F.},
  title     = {Multicriterial optimization of technical systems considering multiple load and availability scenarios},
  series = {Applied Mechanics and Materials},
  volume    = {807},
  journal   = {Applied Mechanics and Materials},
  editor    = {Pelz, Peter F. and Groche, Peter},
  isbn      = {1660-9336},
  doi       = {10.4028/www.scientific.net/AMM.807.247},
  pages     = {247 -- 256},
  year      = {2015},
  abstract  = {Cheap does not imply cost-effective -- this is rule number one of zeitgeisty system design. The initial investment accounts only for a small portion of the lifecycle costs of a technical system. In fluid systems, about ninety percent of the total costs are caused by other factors like power consumption and maintenance. With modern optimization methods, it is already possible to plan an optimal technical system considering multiple objectives. In this paper, we focus on an often neglected contribution to the lifecycle costs: downtime costs due to spontaneous failures. Consequently, availability becomes an issue.},
  language  = {en}
}
@inproceedings{AltherrEdererFarnetaneetal.2017,
  author    = {Altherr, Lena and Ederer, Thorsten and Farnetane, Lucas S. and P{\"o}ttgen, Philipp and Verg{\´e}, Angela and Pelz, Peter F.},
  title     = {Multicriterial design of a hydrostatic transmission system via mixed-integer programming},
  series = {Operations Research Proceedings 2015},
  booktitle = {Operations Research Proceedings 2015},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-319-42901-4},
  doi       = {10.1007/978-3-319-42902-1_41},
  pages     = {301 -- 307},
  year      = {2017},
  abstract  = {In times of planned obsolescence the demand for sustainability keeps growing. Ideally, a technical system is highly reliable, without failures and down times due to fast wear of single components. At the same time, maintenance should preferably be limited to pre-defined time intervals. Dispersion of load between multiple components can increase a system's reliability and thus its availability inbetween maintenance points. However, this also results in higher investment costs and additional efforts due to higher complexity. Given a specific load profile and resulting wear of components, it is often unclear which system structure is the optimal one. Technical Operations Research (TOR) finds an optimal structure balancing availability and effort. We present our approach by designing a hydrostatic transmission system.},
  language  = {en}
}
@article{PoettgenEdererAltherretal.2015,
  author    = {P{\"o}ttgen, Philipp and Ederer, Thorsten and Altherr, Lena and Lorenz, Ulf and Pelz, Peter F.},
  title     = {Examination and optimization of a heating circuit for energy-efficient buildings},
  series = {Energy Technology},
  volume    = {4},
  journal   = {Energy Technology},
  number    = {1},
  publisher = {WILEY-VCH Verlag},
  address   = {Weinheim},
  isbn      = {2194-4296},
  doi       = {10.1002/ente.201500252},
  pages     = {136 -- 144},
  year      = {2015},
  abstract  = {The conference center darmstadtium in Darmstadt is a prominent example of energy efficient buildings. Its heating system consists of different source and consumer circuits connected by a Zortstr{\"o}m reservoir. Our goal was to reduce the energy costs of the system as much as possible. Therefore, we analyzed its supply circuits. The first step towards optimization is a complete examination of the system: 1) Compilation of an object list for the system, 2) collection of the characteristic curves of the components, and 3) measurement of the load profiles of the heat and volume-flow demand. Instead of modifying the system manually and testing the solution by simulation, the second step was the creation of a global optimization program. The objective was to minimize the total energy costs for one year. We compare two different topologies and show opportunities for significant savings.},
  language  = {en}
}
@article{VergePoettgenAltherretal.2016,
  author    = {Verg{\´e}, Angela and P{\"o}ttgen, Philipp and Altherr, Lena and Ederer, Thorsten and Pelz, Peter F.},
  title     = {Lebensdauer als Optimierungsziel: Algorithmische Struktursynthese am Beispiel eines hydrostatischen Getriebes},
  series = {O+P - {\"O}lhydraulik und Pneumatik},
  volume    = {60},
  journal   = {O+P - {\"O}lhydraulik und Pneumatik},
  number    = {1-2},
  editor    = {Greuloch, Ivo and Weber, Manfred and Meier, Miles},
  publisher = {Vereinigte Fachverl.},
  address   = {Mainz},
  issn      = {1614-9602},
  pages     = {114 -- 121},
  year      = {2016},
  abstract  = {Verf{\"u}gbarkeit und Nachhaltigkeit sind wichtige Anforderungen bei der Planung langlebiger technischer Systeme. Meist werden bei Lebensdaueroptimierungen lediglich einzelne Komponenten vordefinierter Systeme untersucht. Ob eine optimale Lebensdauer eine g{\"a}nzlich andere Systemvariante bedingt, wird nur selten hinterfragt. Technical Operations Research (TOR) erlaubt es, aus Obermengen technischer Systeme automatisiert die lebensdaueroptimale Systemstruktur auszuw{\"a}hlen. Der Artikel zeigt dies am Beispiel eines hydrostatischen Getriebes.},
  language  = {de}
}
@incollection{AltherrDoerigEdereretal.2017,
  author    = {Altherr, Lena and D{\"o}rig, Bastian and Ederer, Thorsten and Pelz, Peter Franz and Pfetsch, Marc and Wolf, Jan},
  title     = {A mixed-integer nonlinear program for the design of gearboxes},
  series = {Operations Research Proceedings 2016},
  booktitle = {Operations Research Proceedings 2016},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-319-55701-4},
  doi       = {10.1007/978-3-319-55702-1_31},
  pages     = {227 -- 233},
  year      = {2017},
  abstract  = {Gearboxes are mechanical transmission systems that provide speed and torque conversions from a rotating power source. Being a central element of the drive train, they are relevant for the efficiency and durability of motor vehicles. In this work, we present a new approach for gearbox design: Modeling the design problem as a mixed-integer nonlinear program (MINLP) allows us to create gearbox designs from scratch for arbitrary requirements and—given enough time—to compute provably globally optimal designs for a given objective. We show how different degrees of freedom influence the runtime and present an exemplary solution.},
  language  = {en}
}
@article{AltherrBroetzDietrichetal.2018,
  author    = {Altherr, Lena and Br{\"o}tz, Nicolas and Dietrich, Ingo and Gally, Tristan and Geßner, Felix and Kloberdanz, Hermann and Leise, Philipp and Pelz, Peter Franz and Schlemmer, Pia and Schmitt, Andreas},
  title     = {Resilience in mechanical engineering - a concept for controlling uncertainty during design, production and usage phase of load-carrying structures},
  series = {Applied Mechanics and Materials},
  volume    = {885},
  journal   = {Applied Mechanics and Materials},
  publisher = {Trans Tech Publications},
  address   = {B{\"a}ch},
  isbn      = {1662-7482},
  doi       = {10.4028/www.scientific.net/AMM.885.187},
  pages     = {187 -- 198},
  year      = {2018},
  abstract  = {Resilience as a concept has found its way into different disciplines to describe the ability of an individual or system to withstand and adapt to changes in its environment. In this paper, we provide an overview of the concept in different communities and extend it to the area of mechanical engineering. Furthermore, we present metrics to measure resilience in technical systems and illustrate them by applying them to load-carrying structures. By giving application examples from the Collaborative Research Centre (CRC) 805, we show how the concept of resilience can be used to control uncertainty during different stages of product life.},
  language  = {en}
}
@inproceedings{SchaenzleAltherrEdereretal.2015,
  author    = {Sch{\"a}nzle, Christian and Altherr, Lena and Ederer, Thorsten and Lorenz, Ulf and Pelz, Peter F.},
  title     = {As good as it can be: Ventilation system design by a combined scaling and discrete optimization method},
  series = {Proceedings of FAN 2015},
  booktitle = {Proceedings of FAN 2015},
  pages     = {1 -- 11},
  year      = {2015},
  abstract  = {The understanding that optimized components do not automatically lead to energy-efficient systems sets the attention from the single component on the entire technical system. At TU Darmstadt, a new field of research named Technical Operations Research (TOR) has its origin. It combines mathematical and technical know-how for the optimal design of technical systems. We illustrate our optimization approach in a case study for the design of a ventilation system with the ambition to minimize the energy consumption for a temporal distribution of diverse load demands. By combining scaling laws with our optimization methods we find the optimal combination of fans and show the advantage of the use of multiple fans.},
  language  = {en}
}
@inproceedings{AltherrEdererVergeetal.2015,
  author    = {Altherr, Lena and Ederer, Thorsten and Verg{\´e}, Angela and Pelz, Peter F.},
  title     = {Algorithmische Struktursynthese eines hydrostatischen Getriebes},
  series = {Antriebssysteme 2015 : Elektrik, Mechanik, Fluidtechnik in der Anwendung},
  booktitle = {Antriebssysteme 2015 : Elektrik, Mechanik, Fluidtechnik in der Anwendung},
  publisher = {VDI-Verlag},
  address   = {D{\"u}sseldorf},
  isbn      = {978-3-18-092268-3},
  pages     = {145 -- 155},
  year      = {2015},
  language  = {de}
}
@inproceedings{AltherrEdererSchaenzleetal.2017,
  author    = {Altherr, Lena and Ederer, Thorsten and Sch{\"a}nzle, Christian and Lorenz, Ulf and Pelz, Peter F.},
  title     = {Algorithmic system design using scaling and affinity laws},
  series = {Operations Research Proceedings 2015},
  booktitle = {Operations Research Proceedings 2015},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-319-42901-4},
  doi       = {10.1007/978-3-319-42902-1},
  pages     = {605 -- 611},
  year      = {2017},
  abstract  = {Energy-efficient components do not automatically lead to energy-efficient systems. Technical Operations Research (TOR) shifts the focus from the single component to the system as a whole and finds its optimal topology and operating strategy simultaneously. In previous works, we provided a preselected construction kit of suitable components for the algorithm. This approach may give rise to a combinatorial explosion if the preselection cannot be cut down to a reasonable number by human intuition. To reduce the number of discrete decisions, we integrate laws derived from similarity theory into the optimization model. Since the physical characteristics of a production series are similar, it can be described by affinity and scaling laws. Making use of these laws, our construction kit can be modeled more efficiently: Instead of a preselection of components, it now encompasses whole model ranges. This allows us to significantly increase the number of possible set-ups in our model. In this paper, we present how to embed this new formulation into a mixed-integer program and assess the run time via benchmarks. We present our approach on the example of a ventilation system design problem.},
  language  = {en}
}
@article{AltherrEdererLorenzetal.2014,
  author    = {Altherr, Lena and Ederer, Thorsten and Lorenz, Ulf and Pelz, Peter F. and P{\"o}ttgen, Philipp},
  title     = {Experimental validation of an enhanced system synthesis approach},
  series = {Operations Research Proceedings 2014},
  journal   = {Operations Research Proceedings 2014},
  editor    = {L{\"u}bbecke, Marco and Koster, Arie and Letmathe, Peter and Madlener, Reihard and Peis, Britta and Walther, Grit},
  publisher = {Springer},
  address   = {Basel},
  isbn      = {978-3-319-28695-2},
  doi       = {10.1007/978-3-319-28697-6_1},
  pages     = {6},
  year      = {2014},
  abstract  = {Planning the layout and operation of a technical system is a common task for an engineer. Typically, the workflow is divided into consecutive stages: First, the engineer designs the layout of the system, with the help of his experience or of heuristic methods. Secondly, he finds a control strategy which is often optimized by simulation. This usually results in a good operating of an unquestioned sys- tem topology. In contrast, we apply Operations Research (OR) methods to find a cost-optimal solution for both stages simultaneously via mixed integer program- ming (MILP). Technical Operations Research (TOR) allows one to find a provable global optimal solution within the model formulation. However, the modeling error due to the abstraction of physical reality remains unknown. We address this ubiq- uitous problem of OR methods by comparing our computational results with mea- surements in a test rig. For a practical test case we compute a topology and control strategy via MILP and verify that the objectives are met up to a deviation of 8.7\%.},
  language  = {en}
}
@inproceedings{EnglhardWeberArent2021,
  author    = {Englhard, Markus and Weber, Tobias and Arent, Jan-Christoph},
  title     = {Efficiency enhancement for CFRP-Prepregautoclave manufacturing by means of simulation-assisted loading optimization},
  series = {Proceedings of SAMPE Europe Conference 2021},
  booktitle = {Proceedings of SAMPE Europe Conference 2021},
  pages     = {8 Seiten},
  year      = {2021},
  abstract  = {A new method for improved autoclave loading within the restrictive framework of helicopter manufacturing is proposed. It is derived from experimental and numerical studies of the curing process and aims at optimizing tooling positions in the autoclave for fast and homogeneous heat-up. The mold positioning is based on two sets of information. The thermal properties of the molds, which can be determined via semi-empirical thermal simulation. The second information is a previously determined distribution of heat transfer coefficients inside the autoclave. Finally, an experimental proof of concept is performed to show a cycle time reduction of up to 31\% using the proposed methodology.},
  language  = {en}
}
@masterthesis{Raithel2021,
  type      = {Bachelor Thesis},
  author    = {Raithel, Luise Marie},
  title     = {Die Wilhelma Stuttgart: Ein neues Erscheinungsbild f{\"u}r den zoologisch-botanischen Garten},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {136 Seiten},
  year      = {2021},
  abstract  = {Inmitten des Stuttgarter Kessels findet sich Deutschlands einziger zoologisch-botanischer Garten wieder - die Wilhelma. Umrahmt von einer denkmalgesch{\"u}tzten Parkanlage des 19. Jahrhunderts mit maurischen Geb{\"a}uden l{\"a}sst sie Bildung mit Freizeit verschmelzen. Das neue Erscheinungsbild positioniert die schw{\"a}bische Einrichtung sowohl als Ort des Zusammenkommens als auch der Erholung und Wissensvermittlung. Bereits vor dem Betreten der Wilhelma soll ihre besondere Charakteristik aufgezeigt und entscheidend von {\"a}hnlichen Institutionen distanziert werden. Das grundlegende Gestaltungskonzept r{\"u}ckt die Symbiose aus Zoologie, Botanik und Historie in den Vordergrund. Inspiriert von der maurischen Architektur basiert die Gesamtgestaltung auf feinen geometrischen Formen. Diese bieten Orientierung, unterstreichen die Vielf{\"a}ltigkeit der Wilhelma und vereinen sich dar{\"u}ber hinaus im Logo miteinander.},
  language  = {de}
}
@masterthesis{Najarov2021,
  type      = {Bachelor Thesis},
  author    = {Najarov, Azer},
  title     = {Ich sehe was, was Du nicht siehst: Herkunft \& Identit{\"a}t j{\"u}discher Menschen in Deutschland nach der Nachkriegszeit},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {105 Seiten},
  year      = {2021},
  abstract  = {Wir alle haben schon einmal von ihnen geh{\"o}rt. Die einen kennen sie aus dem Geschichtsunterricht, die anderen haben sie vielleicht auch schon mal bewusst oder unbewusst auf der Straße gesehen. Einige sind es sogar selbst. Die Rede ist von j{\"u}dischen Menschen in Deutschland. In unserer Bundesrepublik wird die j{\"u}dische Bev{\"o}lkerung unausweichlich mit dem Gedanken des Holocausts verbunden. J{\"u}dinnen und Juden wird somit eine Identit{\"a}t zugesprochen, mit der sie nichts zu tun haben. Es findet eine Stigmatisierung statt. Dabei sind j{\"u}dische Menschen heutzutage so divers wie noch nie. Das Printmedium »Ich sehe was, was Du nicht siehst« beleuchtet diese selten wahrgenommene Diversit{\"a}t und zeigt durch spannende Interviews eine j{\"u}dische Welt, die außerhalb der NS-Verbrechen liegt. Dar{\"u}ber hinaus findet man Informationen zu verschiedenen j{\"u}dischen Br{\"a}uchen, historischen Ereignissen und interessanten Infografiken. },
  language  = {de}
}
@masterthesis{Mueller2021,
  type      = {Bachelor Thesis},
  author    = {M{\"u}ller, Elona},
  title     = {Aus den Augen aus dem Sinn?: Ein Bookazine deckt das Problem des Unsichtbaren M{\"u}lls auf},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  year      = {2021},
  abstract  = {M{\"u}ll ist immer und {\"u}berall vorhanden - auch wenn wir ihn nicht sehen. Gerade unsichtbarer M{\"u}ll birgt f{\"u}r den Menschen und seine Umwelt erhebliche Gefahren, die durch seine Unsichtbarkeit irrelevant erscheinen. Die Publikation mit dem Titel mikromakro deckt durch verschiedene Artikel, Interviews und Texte die Gefahren auf, die durch den unsichtbaren M{\"u}ll entstehen. Ziel war es, eine Bookazine-Reihe zu konzipieren, die in sechs Ausgaben das Thema des unsichtbaren M{\"u}lls beleuchtet. Die erste Ausgabe zum Thema Kunststoff wurde exemplarisch gestaltet. Zus{\"a}tzlich zum redaktionellen Teil untermauern Infografiken die Texte faktisch und Fotoserien emotional. Da unsichtbarer M{\"u}ll auf zwei Ebenen zu finden ist - der Makro- (groß) und Mikroebene (klein) - wurde die Publikation inhaltlich zweigeteilt, sodass sich das Layout und die Fotoserien vom Mikro- und Makroteil unterscheiden. },
  language  = {de}
}
@masterthesis{Muehl2021,
  type      = {Bachelor Thesis},
  author    = {M{\"u}hl, Leonie},
  title     = {Neues Erscheinungsbild f{\"u}r den APX: Redesign des LVR - Arch{\"a}ologischen Park Xanten und des R{\"o}mermuseums},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {90 Seiten},
  year      = {2021},
  abstract  = {Der Arch{\"a}ologische Park Xanten (APX) gilt als Deutschlands einziger arch{\"a}ologischer Freiluftpark. Er zeichnet sich im Verbund mit dem R{\"o}mermuseum durch seine Lage auf dem historischen Grund einer r{\"o}mischen Metropole und seine kontinuierliche Forschungsaktivit{\"a}t aus und bietet so ein einzigartiges Umfeld von kultureller Relevanz. Ziel dieses Projektes war es, ein neues Erscheinungsbild zu entwickeln, welches klar die Thematik des Parks in den Medien erkennbar macht. Das Corporate Design dient dazu, die Inhalte des Verbundes in einem einheitlichen System medien{\"u}bergreifend zu pr{\"a}sentieren. Das Design unterst{\"u}tzt den APX in seiner Funktion als Begegnungs- und Bildungsst{\"a}tte. Aufgrund dessen ist es im Hinblick auf das Ziel relevant, das Interesse an Kulturgeschichte und Forschung zu wecken.},
  language  = {de}
}
@masterthesis{Mros2021,
  type      = {Bachelor Thesis},
  author    = {Mros, Christina},
  title     = {Entwicklung eines Erscheinungsbildes sowie einer Kampagne f{\"u}r die Allianz Chronischer Seltener Erkrankungen},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {89 Seiten},
  year      = {2021},
  abstract  = {Die Allianz Chronischer Seltener Erkrankungen (ACHSE) ist das einzige krankheits{\"u}bergreifende Netzwerk von und f{\"u}r Menschen mit einer seltenen Erkrankung in Deutschland. Insgesamt sind 4 Millionen Menschen in Deutschland von einer der rund 8.000 seltenen Krankheiten betroffen. Durch die Seltenheit der verschiedenen Krankheiten ist es oft schwer, Experten zu finden, die richtige Versorgung sicherzustellen oder Studien durchzuf{\"u}hren. Betroffene f{\"u}hlen sich oft nicht wahrgenommen und alleine gelassen. Die ACHSE dient als unabh{\"a}ngige Schnittstelle und Knotenpunkt zwischen Betroffenen, Regierung, Politik und Wirtschaft. Gemeinsam b{\"u}ndeln sich hier 130 Patientenorganisationen unter einem Dach, um die Betroffenen in den Fokus zu r{\"u}cken. Ziel der Bachelorarbeit ist die Entwicklung eines Erscheinungsbildes sowie einer Kampagne, die das Thema mehr ins Bewusstsein der {\"O}ffentlichkeit bringt und informiert.},
  language  = {de}
}
@masterthesis{Mann2021,
  type      = {Bachelor Thesis},
  author    = {Mann, Judith},
  title     = {Entwicklung eines neuen Erscheinungsbildes f{\"u}r das Museum f{\"u}r Ostasiatische Kunst K{\"o}ln},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {89 Seiten},
  year      = {2021},
  abstract  = {Seit dem Zeitpunkt seiner Gr{\"u}ndung im Jahr 1909 lautet der Auftrag des K{\"o}lner Museums f{\"u}r Ostasiatische Kunst, der europ{\"a}ischen Gesellschaft die Kunst Ostasiens nahezubringen, f{\"u}r ein besseres Verst{\"a}ndnis und die Wertsch{\"a}tzung seiner Kultur zu sorgen und somit auch Rassismus und kolonialistischem Denken entgegenzuwirken - ein Anliegen, welches noch heute von unver{\"a}nderter Relevanz und Dringlichkeit ist. Im Zentrum des neuen Erscheinungsbildes steht der gest{\"u}rzte Buchstabe K und die somit entstehende Kombination von horizontaler und vertikaler, traditionell ostasiatischer Leserichtung deutet auf visueller Ebene ein Zusammenspiel zwischen den Kulturen an. Die Farbgebung des neuen Erscheinungsbildes greift die ruhige Atmosph{\"a}re des Museums auf und sorgt in Kombination mit einem streng gegliederten Raster f{\"u}r klare Struktur und Orientierung.},
  language  = {de}
}
@masterthesis{Kausen2021,
  type      = {Bachelor Thesis},
  author    = {Kausen, Catharina Marie},
  title     = {Transmission: Ein animiertes Musikvideo illustriert die Liebe und Verbindung zum Genre Techno},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {88 Seiten},
  year      = {2021},
  abstract  = {Techno ist seit seiner Entstehung mehr als ein Musik-Genre. Es ist ein Lebensgef{\"u}hl und eine Bewegung. Techno-Partys dienen vielen Menschen als Ventil, um die Sorgen des Alltags f{\"u}r eine Nacht vergessen zu k{\"o}nnen. „Transmission" portr{\"a}tiert anhand der Protagonistin die pers{\"o}nliche Beziehung zum Genre Techno. Das Musikvideo soll die Zuschauenden visuell anregen und mitreißen. Es bietet ihnen die M{\"o}glichkeit, sich selbst wieder erkennen zu k{\"o}nnen und soll Außenstehenden einen Einblick in die Techno-Szene erm{\"o}glichen. Mithilfe des Rotoskopie-Verfahrens konnte ein realistischer Animationsstil erreicht werden, welcher durch eine unrealistische Farbgebung der Charaktere gebrochen wird. Der Schwerpunkt der Bachelorarbeit liegt in der kreativ-gestalterischen Ausarbeitung. Die Musikvideo „Transmission" vermittelt das „Lebensgef{\"u}hl Techno" visuell anregend und nachvollziehbar.},
  language  = {de}
}
@masterthesis{Jonas2021,
  type      = {Bachelor Thesis},
  author    = {Jonas, Eva Johanna},
  title     = {The future of work: How to create a better User Experience for distributed workforce},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {213 Seiten},
  year      = {2021},
  abstract  = {Die Nachfrage nach flexiblen Arbeitsmodellen und damit Remote Work steigt und wird zunehmend zum Kriterium bei der Jobauswahl. Trotz der vielen Vorteile gibt es in der „Remote-Arbeitswelt" aber immer noch einige Herausforderungen. Remote Arbeitende haben eine andere, teils nachteilige Erfahrung gegen{\"u}ber Kollegen vor Ort. Um daf{\"u}r eine nutzerzentrierte L{\"o}sung zu finden, lag der Fokus bei dieser Arbeit auf den Auswirkungen und Bed{\"u}rfnissen des arbeitenden Menschen. Basierend hierauf wurde ein Dienstleistungsservice konzipiert. Dieser unterst{\"u}tzt Unternehmen, Selbstst{\"a}ndige und Mitarbeitende durch passende Angebote und Dienstleistungen in den Bereichen Ausstattung, Technik, Gesundheit, Corporate Benefits u.{\"A}. Dies erm{\"o}glicht auch Arbeitgebenden Aufgaben auszulagern und die Attraktivit{\"a}t und Konkurrenzf{\"a}higkeit auf dem Arbeitsmarkt zu steigern. Das wird zuk{\"u}nftig im „war for digitals talents" immer wichtiger werden.},
  language  = {de}
}
@masterthesis{Hirt2021,
  type      = {Bachelor Thesis},
  author    = {Hirt, Miriam},
  title     = {Zwei sind eine Gemeinschaft: Illustrative Neuinterpretation des Romans "Eine Insel" von T. Pratchett},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {143 Seiten},
  year      = {2021},
  abstract  = {Das Projekt „Zwei sind eine Gemeinschaft" befasst sich mit der Entwicklung einer gebundenen Fassung der Graphic Novel als Adaption des Kinderromans „Eine Insel" von Terry Pratchett. Diese soll den Betrachtenden erm{\"o}glichen, mittels ansprechenden Illustrationen tiefer in die fantasievolle Welt der Geschichte einzutauchen, dem Alltag zu entfliehen und so die Begeisterung zum Medium Buch wieder aufleben zu lassen. Durch die Verbindung von Techniken des Grafikdesigns und der klassischen Illustration verbindet der Stil sowohl die moderne, ausdrucksstarke und sehr grafische Bildsprache mit der Eigenschaft, kreativen Interpretationsspielraum zu lassen und tiefe Emotionen zu erzeugen. Die besondere Innovation des Projekts zeigt sich durch das Konzept des illustrativen Baukastensystems, welches erm{\"o}glicht, die einzelnen Illustrationen effizient und intuitiv zu gestalten.},
  language  = {de}
}
@masterthesis{Henkenjohann2021,
  type      = {Bachelor Thesis},
  author    = {Henkenjohann, Janne},
  title     = {Erlebnisraum Theater: Entwicklung des Corporate Designs sowie crossmedialer Konzepte},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {181 Seiten},
  year      = {2021},
  abstract  = {Die Kunst des Theaters ist alt. Gegenw{\"a}rtig z{\"a}hlt sie allerdings immer noch zu den wichtigsten Tr{\"a}gern des k{\"u}nstlerischen Kulturguts. Doch die Welt in der wir leben hat sich in den letzten Jahren deutlich ver{\"a}ndert. Sie ist komplexer geworden. Die Anzahl der losen Informationen, die in unsere Wahrnehmungsbereiche hineinragen, hat sich explosionsartig erh{\"o}ht. Ein großer Anteil dieser Ver{\"a}nderung ist auf die Digitalisierung verschiedener Lebensbereiche zur{\"u}ckzuf{\"u}hren. Die Werkzeuge, welche im Zuge der Digitalisierung kreiert wurden, werden von den meisten heute selbstverst{\"a}ndlich genutzt. Doch was bedeutet diese neue Entwicklung f{\"u}r das Theater und wie sollte es auf diese Ver{\"a}nderungen reagieren? Als gestalterische Antwort entstand ein neues Erscheinungsbild, welches crossmedial sowohl die analogen S{\"a}ulen des Theaters, als auch die neuen digitalen Formen des Alltags auffangen und kommunizieren kann.},
  language  = {de}
}
@masterthesis{Heinrichs2021,
  type      = {Bachelor Thesis},
  author    = {Heinrichs, Lars},
  title     = {!MPFEN: Eine informative Kampagne, die zum Impfen motiviert},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {58 Seiten},
  year      = {2021},
  abstract  = {Eine Kampagne, die darauf ausgerichtet ist, die Bev{\"o}lkerung auf sozialer Ebene aufzurufen, Impf-Skeptiker aufzukl{\"a}ren und von Impfungen zu {\"u}berzeugen. Anhand von offiziellen Statistiken, die optisch ansprechend aufbereitet wurden, werden die Menschen {\"u}ber Krankheiten und dazu geh{\"o}rige Risiken informiert. Des Weiteren wird der Impferfolg grafisch dokumentiert und leicht verst{\"a}ndlich pr{\"a}sentiert, ohne Fakten auszulassen. Durch eine Serie Plakate verschiedener Formate werden die Betrachter animiert, die Homepage impfen.info aufzusuchen und das reichhaltige Informationsangebot zu nutzen. Mithilfe einer am{\"u}santen Postkartenreihe wird die Verbreitung von Krankheitserregern simuliert und postalisch in die Haushalte der Impfgegner- und Skeptiker gebracht, um zu verdeutlichen, wie rasant Viren sich verbreiten und wie wichtig es ist, sich und seine Lieben zu sch{\"u}tzen.},
  language  = {de}
}
@masterthesis{Hahn2021,
  type      = {Bachelor Thesis},
  author    = {Hahn, Veronika},
  title     = {Masculinity: M{\"a}nnlichkeit im 21. Jahrhundert},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {62 Seiten},
  year      = {2021},
  abstract  = {Was ist „M{\"a}nnlichkeit" und was verstehen junge Erwachsene unter diesem Begriff? Das Ziel des Projektes war 18 bis 30 j{\"a}hrige Jungen und M{\"a}nner des biologisch m{\"a}nnlichen Geschlechts zu befragen, was ihre Definition von M{\"a}nnlichkeit sei. Diese Arbeit hatte die Intention den Befragten einen sicheren Raum zu geben, damit sie ihre ehrlichen Antworten {\"a}ußern und ihre wahren Gesichter zeigen k{\"o}nnen. Die dabei entstandenen Fotografien sollen die Pers{\"o}nlichkeiten und die seelische Verfassung der abgebildeten Personen widerspiegeln. Es handelt sich um eine soziologische Bestandsaufnahme der „M{\"a}nnlichkeiten" der heutigen Jugend und der heranwachsenden Erwachsenen im 21. Jahrhundert.},
  language  = {de}
}
@masterthesis{Goetz2021,
  type      = {Bachelor Thesis},
  author    = {Goetz, Miriam},
  title     = {Der globale Haarmarkt: Gestaltung eines aufkl{\"a}renden Mediums zum Thema Haar und Haarhandel},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {77 Seiten},
  year      = {2021},
  abstract  = {Niemand kann der t{\"a}glichen Erfahrung mit Haaren entfliehen. Ob es nun der eigene Blick in den Spiegel ist, die Begegnung mit anderen Menschen, oder die mit Testimonials gespeiste Werbung f{\"u}r diverse Haarprodukte. Haare geh{\"o}ren zum Alltag. Aber was steckt hinter dem Haar, wenn es denn einmal von uns und unserer Person getrennt wird und nur noch als k{\"o}rperloses B{\"u}schel erkennbar ist? Zum Beispiel in Form von Echthaarextensions. Wer bedient freiwillig und unfreiwillig durch die eigene Haarpracht die millionenschwere Echthaarindustrie? Wer profitiert von der haarigen Ware und wer sind die K{\"a}ufer, die den globalen Handel vorantreiben? Das j{\"a}hrlich erscheinende Bookazine TRICHOTOMY geht diesen Fragestellungen auf den Grund. Investigative Artikel enth{\"u}llen die Produktion und {\"O}konomie der vorwiegend anonymisierten Echthaarindustrie und portr{\"a}tieren die Menschen und Schicksale 'hinter den Haaren'.},
  language  = {de}
}
@masterthesis{Franken2021,
  type      = {Bachelor Thesis},
  author    = {Franken, Florian},
  title     = {Zeitfenster: Eine Dorfgeschichte aus Bildcollagen},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {113 Seiten},
  year      = {2021},
  abstract  = {Die Zeit befindet sich im st{\"a}ndigen Wandel. Mit ihr verbindet man Zukunft, Vergangenheit und Gegenwart. Letzteres pr{\"a}gt das jetzige Dasein. Der Zeitwandel ist ein Prozess, {\"u}ber den wir uns meist erst nach Jahren bewusstwerden. Besonders, wenn man das Dorf, in welchem man aufgewachsen ist, n{\"a}her betrachtet, f{\"a}llt einem auf, was sich im Laufe der Jahre architektonisch oder infrastrukturell ver{\"a}ndert hat. So stellt sich die Frage, wie das Dorf im letzten Jahrhundert ausgesehen hat. Wie sah es vor, w{\"a}hrend und nach den beiden Weltkriegen aus? Wie war das Dorfleben in der Zwischenkriegszeit? Was hat sich im letzten Jahrhundert ver{\"a}ndert? Diese Arbeit zeigt den Wandel der Zeit, kombiniert aus Vergangenheit und Gegenwart. Damalige Aufnahmeorte wurden erneut aufgesucht, die Fotos aus der gleichen Position wurden neu abgelichtet und miteinander kombiniert.},
  language  = {de}
}
@masterthesis{Flohr2021,
  type      = {Bachelor Thesis},
  author    = {Flohr, Katharina Sophie},
  title     = {Real:ly?: Perspektiven \& soziokulturelle Unterschiede in der Berichterstattung},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {105 Seiten},
  year      = {2021},
  abstract  = {Wie real ist unsere Realit{\"a}t? Wie »wirklich« ist das, was wir wahrnehmen und wie »wahr« kann die »Wahrheit« eigentlich sein? Medial vermittelte Informationen spielen f{\"u}r den Prozess der Meinungsbildung eine entscheidende Rolle. In der Wanderausstellung real:ly? geht es um einen Perspektivwechsel. Am Beispiel der »Atomwaffentests auf den Marshallinseln« wird das medial erzeugte Bild amerikanischer Berichterstattung pers{\"o}nlichen Geschichten der Marshaller*innen gegen{\"u}bergestellt: Technologischer Fortschritt, das Wettr{\"u}sten mit der UdSSR und die Macht {\"u}ber die Atombombe treffen auf Erz{\"a}hlungen {\"u}ber Zwangsumsiedlung, Krankheit, Ausbeutung und Abh{\"a}ngigkeit. real:ly? soll daran erinnern, die andere Seite der Medaille zu bedenken und eine andere Perspektive einzunehmen, bevor man seine Meinung bildet. Denn alles, was wir zu wissen glauben, ist nur ein kleiner Teil der ganzen Geschichte.},
  language  = {de}
}
@masterthesis{Ernst2021,
  type      = {Bachelor Thesis},
  author    = {Ernst, Loredana},
  title     = {Let´s change fashion!: Eine Image-Kampagne der Fair Wear Foundation f{\"u}r faire und nachhaltige Mode.},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {61 Seiten},
  year      = {2021},
  abstract  = {Fast Fashion-Ketten beherrschen die Modewelt. Doch einige Unternehmen, Siegel und Stiftungen versuchen die Textilindustrie neu umzugestalten. Um die Modeindustrie nachhaltig zu ver{\"a}ndern, m{\"u}ssen allerdings auch den Kunden die schlechten Arbeitsbedingungen und die negativen Einfl{\"u}sse der Textilbranche auf die Umwelt bewusst werden. Das konkrete Ziel der erstellten Kampagne ist es, modebewusste Menschen davon zu {\"u}berzeugen Fast Fashion hinter sich zu lassen. Es soll also ein Umdenken bei den Konsumenten stattfinden. Die Fair Wear Foundation und ihre Mitglieder vertreten die Vision, dass Mode auch fair und nachhaltig sein kann. Genau diese Vision soll mit der Kampagne vermittelt und an die Konsumenten weitergetragen werden.},
  language  = {de}
}
@masterthesis{Drees2021,
  type      = {Bachelor Thesis},
  author    = {Drees, Niklas},
  title     = {Retrieval: Ein experimenteller Film {\"u}ber Erinnerungen und wie sie uns definieren},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {198 Seiten},
  year      = {2021},
  abstract  = {Welchen Einfluss haben Erinnerungen auf unser Bewusstsein und wie definieren sie uns als Individuum? Erinnerungen gehen verloren — sei es durch einfaches Vergessen, traumatische Erlebnisse oder Krankheit. Aber wie sehr wirkt sich das Vergessen auf unsere Pers{\"o}nlichkeit aus? Wenn wichtige Erlebnisse aus unserer Erinnerung verschwinden, bleiben wir dann noch wir selbst? F{\"u}r die gestalterische Auseinandersetzung mit diesen Fragen wurde das Medium Film gew{\"a}hlt. Der Film f{\"u}hrt uns auf eine Reise durch die Erinnerungs- und Gedankenwelt einer Person, die ihre Erinnerung verloren hat. Mit der Hilfe des Psychologen Dr. Daniel Rose soll ein Memory-Backup durchgef{\"u}hrt werden, um die verlorenen Erinnerungen wiederherzustellen. Dabei sollen ihre Erinnerungen neu aufgesetzt werden, um ihr altes Bewusstsein zur{\"u}ckzugewinnen. St{\"u}ck f{\"u}r St{\"u}ck werden die verlorenen Erinnerungen in verschiedenen Bewusstseinsphasen zusammengesetzt und mit ihnen l{\"o}st sich das R{\"a}tsel ihres Verschwindens.},
  language  = {de}
}
@masterthesis{Anders2021,
  type      = {Bachelor Thesis},
  author    = {Anders, Milena},
  title     = {Alternative Landwirtschaft - Wo kommt unser Essen her?},
  publisher = {FH Aachen},
  address   = {Aachen},
  school      = {Fachhochschule Aachen},
  pages     = {79 Seiten},
  year      = {2021},
  abstract  = {In den letzten 1.5 Jahren haben wir sehr deutlich gemerkt, dass es den Klimawandel wirklich gibt - ein Virus, welches unsere gesamte Welt auf links dreht, {\"U}berschwemmungskatastrophen, extreme Temperaturschwankungen, etc. Es ist also Zeit etwas zu ver{\"a}ndern, es ist Zeit aktiv hinzusehen und zu handeln - bewusst zu leben, bewusst zu konsumieren. Das Thema Ern{\"a}hrung wird zwar immer wichtiger f{\"u}r einige von uns, jedoch reicht mir die Aufmerksamkeit bisher nicht. Es sind nicht nur Lebensmittel, welche nach dem Aufenthalt im Supermarkt in unserem K{\"u}hlschrank und anschließend in unserem Bauch landen. Mit diesen Lebensmitteln gehen außerdem folgende Aspekte einher: der Klimawandel, unsere Gesundheit, die Ausbeutung von Tieren, Menschen und Natur. Also wie sieht eigentlich der Enstehungsprozess hinter all diesen (meist) verpackten Lebensmitteln aus? Einen Teil dieser Prozesse habe ich mir im Rahmen meiner Bachelorarbeit angeschaut. Ich habe ausschließlich Bio-H{\"o}fe besucht, um mir ein eigenes Bild von "alternativer Landwirtschaft" zu machen. Die Arbeit erm{\"o}glicht Interessierten einen neutralen Einblick hinter die Kulisse unserer Lebensmittel und schafft eine Anregung f{\"u}r einen bewussteren Konsum.},
  language  = {de}
}
@inproceedings{PfeifferBalcGebhardt2021,
  author    = {Pfeiffer, Johann and Balc, N. and Gebhardt, Andreas},
  title     = {Studie zur Untersuchung der Auswirkung von Fr{\"a}sbahnstrategien auf die Oberfl{\"a}chenqualit{\"a}t von mittels SLM gefertigten Metallteilen},
  series = {Tagungsband 21. Nachwuchswissenschaftler*innenkonferenz},
  booktitle = {Tagungsband 21. Nachwuchswissenschaftler*innenkonferenz},
  publisher = {Verlag Ernst-Abbe-Hochschule Jena},
  address   = {Jena},
  isbn      = {978-3-932886-36-2},
  pages     = {99 -- 102},
  year      = {2021},
  abstract  = {F{\"u}r die Herstellung von metallischen Bauteilen wird in der heutigen Zeit eine Vielzahl von Verfahren auf dem Markt angeboten. Dabei stehen die additiven im Wettbewerb zu den konventionellen Verfahren. Die erreichbaren Oberfl{\"a}chenqualit{\"a}ten der additiven sind nicht mit denen spanender Verfahren vergleichbar. F{\"u}r diesen Beitrag wurde analysiert, ob sich ein mittels Selektivem Laserschmelzen (SLM) additiv hergestellter Edelstahl hinsichtlich seiner Oberfl{\"a}chenqualit{\"a}t nach der Zerspanung von einem umgeformten konventionell hergestellten Edelstahl gleicher Sorte unterscheidet.},
  language  = {de}
}
@incollection{JordanKatzPieper2021,
  author    = {Jordan, Frank and Katz, Christiane and Pieper, Martin},
  title     = {Online-Kollaboration in der Mathematik: Ein Design-Based-Research-Projekt},
  series = {Forschungsimpulse f{\"u}r hybrides Lehren und Lernen an Hochschulen},
  booktitle = {Forschungsimpulse f{\"u}r hybrides Lehren und Lernen an Hochschulen},
  publisher = {TH K{\"o}ln},
  address   = {K{\"o}ln},
  url       = {http://nbn-resolving.de/urn:nbn:de:hbz:832-cos4-9465},
  pages     = {245 -- 261},
  year      = {2021},
  abstract  = {Die Studie er{\"o}rtert anhand eines Fallbeispiels aus der Mathematik f{\"u}r Ingenieur*innen, wie didaktische Gestaltungsprinzipien f{\"u}r Soziale Pr{\"a}senz, Kollaboration und das L{\"o}sen von praxisnahen Problemen mit mathematischem Denken in einer Online-Umgebung aussehen k{\"o}nnen. Hierf{\"u}r zieht der Beitrag den forschungsmethodologischen Rahmen Design-Based Research (DBR) hinzu und berichtet {\"u}ber Zwischenergebnisse. DBR wird an dieser Stelle als eine systematische Herangehensweise an kurzfristige Lehrver{\"a}nderungen und als Chance auf dem Weg zu einer neuen Hochschullehre nach der COVID-19-Pandemie dargestellt, die theoretische und empirische Erkenntnisse mit Praxisverkn{\"u}pfung und -relevanz vereint.},
  language  = {de}
}
@book{Pieper2021,
  author    = {Pieper, Martin},
  title     = {Quantum mechanics: Introduction to mathematical formulation},
  publisher = {Springer},
  address   = {Wiesbaden},
  isbn      = {978-3-658-32644-9},
  doi       = {10.1007/978-3-658-32645-6},
  pages     = {XIII, 33},
  year      = {2021},
  abstract  = {Anyone who has always wanted to understand the hieroglyphs on Sheldon's blackboard in the TV series The Big Bang Theory or who wanted to know exactly what the fate of Schr{\"o}dinger's cat is all about will find a short, descriptive introduction to the world of quantum mechanics in this essential. The text particularly focuses on the mathematical description in the Hilbert space. The content goes beyond popular scientific presentations, but is nevertheless suitable for readers without special prior knowledge thanks to the clear examples.},
  language  = {en}
}
@inproceedings{KernImaniVashianiTimmermanns2021,
  author    = {Kern, Alexander and Imani Vashiani, Anahita and Timmermanns, Tobias},
  title     = {Threat for human beings due to touch voltages and body currents caused by direct lightning strikes in case of non-isolated lightning protection systems using natural components},
  series = {35th International Conference on Lightning Protection (ICLP) and XVI International Symposium on Lightning Protection (SIPDA)},
  booktitle = {35th International Conference on Lightning Protection (ICLP) and XVI International Symposium on Lightning Protection (SIPDA)},
  publisher = {IEEE},
  address   = {New York, NY},
  isbn      = {978-1-6654-2346-5},
  doi       = {10.1109/ICLPandSIPDA54065.2021.9627465},
  pages     = {8 Seiten},
  year      = {2021},
  abstract  = {For typical cases of non-isolated lightning protection systems (LPS) the impulse currents are investigated which may flow through a human body directly touching a structural part of the LPS. Based on a basic LPS model with conventional down-conductors especially the cases of external and internal steel columns and metal fa{\c{c}}ades are considered and compared. Numerical simulations of the line quantities voltages and currents in the time domain are performed with an equivalent circuit of the entire LPS. As a result it can be stated that by increasing the number of conventional down-conductors and external steel columns the threat for a human being can indeed be reduced, but not down to an acceptable limit. In case of internal steel columns used as natural down-conductors the threat can be reduced sufficiently, depending on the low-resistive connection of the steel columns to the lightning equipotential bonding or the earth termination system, resp. If a metal fa{\c{c}}ade is used the threat for human beings touching is usually very low, if the fa{\c{c}}ade is sufficiently interconnected and multiply connected to the lightning equipotential bonding or the earth termination system, resp.},
  language  = {en}
}
@article{GrundlachBaumannEngelmann2021,
  author    = {Grundlach, Michael and Baumann, Martin and Engelmann, Ulrich M.},
  title     = {How Multimodal Examinations Can Increase Sustainable Student Gain by Aligning Teaching and Assessment},
  series = {Current Directions in Biomedical Engineering},
  volume    = {7},
  journal   = {Current Directions in Biomedical Engineering},
  number    = {7/2},
  editor    = {D{\"o}ssel, Olaf},
  publisher = {De Gruyter},
  address   = {Berlin},
  isbn      = {2364-5504},
  doi       = {10.1515/cdbme-2021-2019},
  pages     = {73 -- 76},
  year      = {2021},
  abstract  = {Modern industry and multi-discipline projects require highly trained individuals with resilient science and engineering back-grounds. Graduates must be able to agilely apply excellent theoretical knowledge in their subject matter as well as essential practical "hands-on" knowledge of diverse working processes to solve complex problems. To meet these demands, university education follows the concept of Constructive Alignment and thus increasingly adopts the teaching of necessary practical skills to the actual industry requirements and assessment routines. However, a systematic approach to coherently align these three central teaching demands is strangely absent from current university curricula. We demonstrate the feasibility of implementing practical assessments in a regular theory-based examination, thus defining the term "blended assessment". We assessed a course for natural science and engineering students pursuing a career in biomedical engineering, and evaluated the benefit of blended assessment exams for students and lecturers. Our controlled study assessed the physiological background of electrocardiograms (ECGs), the practical measurement of ECG curves, and their interpretation of basic pathologic alterations. To study on long time effects, students have been assessed on the topic twice with a time lag of 6 months. Our findings suggest a significant improvement in student gain with respect to practical skills and theoretical knowledge. The results of the reassessments support these outcomes. From the lecturers' point of view, blended assessment complements practical training courses while keeping organizational effort manageable. We consider blended assessment a viable tool for providing an improved student gain, industry-ready education format that should be evaluated and established further to prepare university graduates optimally for their future careers.},
  language  = {en}
}
@article{WerfelGuenthnerHapfelmeieretal.2022,
  author    = {Werfel, Stanislas and G{\"u}nthner, Roman and Hapfelmeier, Alexander and Hanssen, Henner and Kotliar, Konstantin and Heemann, Uwe and Schmaderer, Christoph},
  title     = {Identification of cardiovascular high-risk groups from dynamic retinal vessel signals using untargeted machine learning},
  series = {Cardiovascular Research},
  volume    = {118},
  journal   = {Cardiovascular Research},
  number    = {2},
  editor    = {Guzik, Tomasz J.},
  publisher = {Oxford University Press},
  address   = {Oxford},
  issn      = {0008-6363},
  doi       = {10.1093/cvr/cvab040},
  pages     = {612 -- 621},
  year      = {2022},
  abstract  = {Dynamic retinal vessel analysis (DVA) provides a non-invasive way to assess microvascular function in patients and potentially to improve predictions of individual cardiovascular (CV) risk. The aim of our study was to use untargeted machine learning on DVA in order to improve CV mortality prediction and identify corresponding response alterations.},
  language  = {en}
}
@article{AlbannaConzenWeissetal.2021,
  author    = {Albanna, Walid and Conzen, Catharina and Weiss, Miriam and Seyfried, Katharina and Kotliar, Konstantin and Schmidt, Tobias Philip and Kuerten, David and Hescheler, J{\"u}rgen and Bruecken, Anne and Schmidt-Trucks{\"a}ss, Arno and Neumaier, Felix and Wiesmann, Martin and Clusmann, Hans and Schubert, Gerrit Alexander},
  title     = {Non-invasive assessment of neurovascular coupling after aneurysmal subarachnoid hemorrhage: a prospective observational trial using retinal vessel analysis},
  series = {Frontiers in Neurology},
  volume    = {12},
  journal   = {Frontiers in Neurology},
  number    = {12},
  issn      = {1664-2295},
  doi       = {10.3389/fneur.2021.690183},
  pages     = {1 -- 15},
  year      = {2021},
  abstract  = {Delayed cerebral ischemia (DCI) is a common complication after aneurysmal subarachnoid hemorrhage (aSAH) and can lead to infarction and poor clinical outcome. The underlying mechanisms are still incompletely understood, but animal models indicate that vasoactive metabolites and inflammatory cytokines produced within the subarachnoid space may progressively impair and partially invert neurovascular coupling (NVC) in the brain. Because cerebral and retinal microvasculature are governed by comparable regulatory mechanisms and may be connected by perivascular pathways, retinal vascular changes are increasingly recognized as a potential surrogate for altered NVC in the brain. Here, we used non-invasive retinal vessel analysis (RVA) to assess microvascular function in aSAH patients at different times after the ictus.},
  language  = {en}
}
@article{KuertenKotliarFuestetal.2021,
  author    = {Kuerten, David and Kotliar, Konstantin and Fuest, Matthias and Walter, Peter and Hollstein, Muriel and Plange, Niklas},
  title     = {Does hemispheric vascular regulation differ significantly in glaucoma patients with altitudinal visual field asymmetry? A single-center, prospective study},
  series = {International Ophthalmology},
  volume    = {41},
  journal   = {International Ophthalmology},
  number    = {41},
  editor    = {Neri, Piergiorgio},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {1573-2630},
  doi       = {10.1007/s10792-021-01876-0},
  pages     = {3109 -- 3119},
  year      = {2021},
  abstract  = {Purpose Vascular risk factors and ocular perfusion are heatedly discussed in the pathogenesis of glaucoma. The retinal vessel analyzer (RVA, IMEDOS Systems, Germany) allows noninvasive measurement of retinal vessel regulation. Significant differences especially in the veins between healthy subjects and patients suffering from glaucoma were previously reported. In this pilot-study we investigated if localized vascular regulation is altered in glaucoma patients with altitudinal visual field defect asymmetry. Methods 15 eyes of 12 glaucoma patients with advanced altitudinal visual field defect asymmetry were included. The mean defect was calculated for each hemisphere separately (-20.99 ± 10.49 pro- found hemispheric visual field defect vs -7.36 ± 3.97 dB less profound hemisphere). After pupil dilation, RVA measurements of retinal arteries and veins were conducted using the standard protocol. The superior and inferior retinal vessel reactivity were measured consecutively in each eye. Results Significant differences were recorded in venous vessel constriction after flicker light stimulation and overall amplitude of the reaction (p \ 0.04 and p \ 0.02 respectively) in-between the hemispheres spheres. Vessel reaction was higher in the hemisphere corresponding to the more advanced visual field defect. Arterial diameters reacted similarly, failing to reach statistical significance. Conclusion Localized retinal vessel regulation is significantly altered in glaucoma patients with asymmetri altitudinal visual field defects. Veins supplying the hemisphere concordant to a less profound visual field defect show diminished diameter changes. Vascular dysregulation might be particularly important in early glaucoma stages prior to a significant visual field defect.},
  language  = {en}
}
@incollection{Kotliar2021,
  author    = {Kotliar, Konstantin},
  title     = {Ocular rigidity: clinical approach},
  series = {Ocular Rigidity, Biomechanics and Hydrodynamics of the Eye},
  booktitle = {Ocular Rigidity, Biomechanics and Hydrodynamics of the Eye},
  editor    = {Pallikaris, I. and Tsilimbaris, M. K. and Dastiridou, A. I.},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-64422-2},
  doi       = {10.1007/978-3-030-64422-2_2},
  pages     = {15 -- 43},
  year      = {2021},
  abstract  = {The term ocular rigidity is widely used in clinical ophthalmology. Generally it is assumed as a resistance of the whole eyeball to mechanical deformation and relates to biomechanical properties of the eye and its tissues. Basic principles and formulas for clinical tonometry, tonography and pulsatile ocular blood flow measurements are based on the concept of ocular rigidity. There is evidence for altered ocular rigidity in aging, in several eye diseases and after eye surgery. Unfortunately, there is no consensual view on ocular rigidity: it used to make a quite different sense for different people but still the same name. Foremost there is no clear consent between biomechanical engineers and ophthalmologists on the concept. Moreover ocular rigidity is occasionally characterized using various parameters with their different physical dimensions. In contrast to engineering approach, clinical approach to ocular rigidity claims to characterize the total mechanical response of the eyeball to its deformation without any detailed considerations on eye morphology or material properties of its tissues. Further to the previous chapter this section aims to describe clinical approach to ocular rigidity from the perspective of an engineer in an attempt to straighten out this concept, to show its advantages, disadvantages and various applications.},
  language  = {en}
}
@incollection{AltherrEdererLorenzetal.2016,
  author    = {Altherr, Lena and Ederer, Thorsten and Lorenz, Ulf and Pelz, Peter F. and P{\"o}ttgen, Philipp},
  title     = {Designing a feedback control system via mixed-integer programming},
  series = {Operations Research Proceedings 2014: Selected Papers of the Annual International Conference of the German Operations Research},
  booktitle = {Operations Research Proceedings 2014: Selected Papers of the Annual International Conference of the German Operations Research},
  editor    = {L{\"u}bbecke, Marco E. and Koster, Arie and Letmathe, Peter and Madlener, Reihard and Preis, Britta and Walther, Grit},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-319-28695-2},
  doi       = {10.1007/978-3-319-28697-6_18},
  pages     = {121 -- 127},
  year      = {2016},
  abstract  = {Pure analytical or experimental methods can only find a control strategy for technical systems with a fixed setup. In former contributions we presented an approach that simultaneously finds the optimal topology and the optimal open-loop control of a system via Mixed Integer Linear Programming (MILP). In order to extend this approach by a closed-loop control we present a Mixed Integer Program for a time discretized tank level control. This model is the basis for an extension by combinatorial decisions and thus for the variation of the network topology. Furthermore, one is able to appraise feasible solutions using the global optimality gap.},
  language  = {en}
}
@book{Altherr2016,
  author    = {Altherr, Lena},
  title     = {Algorithmic System Design under Consideration of Dynamic Processes},
  publisher = {Shaker},
  address   = {Aachen},
  isbn      = {978-3-8440-4848-3},
  pages     = {94},
  year      = {2016},
  abstract  = {Nach Stand von Wissenschaft und Technik werden Komponenten hinsichtlich ihrer Eigenschaften, wie Lebensdauer oder Energieeffizienz, optimiert. Allerdings k{\"o}nnen selbst hervorragende Komponenten zu ineffizienten oder instabilen Systemen f{\"u}hren, wenn ihr Zusammenspiel nur unzureichend ber{\"u}cksichtigt wird. Eine Systembetrachtung schafft ein gr{\"o}ßeres Optimierungspotential - dem erh{\"o}hten Potential steht jedoch auch ein erh{\"o}hter Komplexit{\"a}tsgrad gegen{\"u}ber. Die vorliegende Arbeit ist im Rahmen des Sonderforschungsbereichs 805 entstanden, dessen Ziel die Beherrschung von Unsicherheit in Systemen des Maschinenbaus ist. Die Arbeit zeigt anhand eines realen Systems aus dem Bereich der Hydraulik, wie Unsicherheit in der Entwicklungsphase beherrscht werden kann. Hierbei ist neu, dass die durch den sp{\"a}teren Betrieb zu erwartende Systemdegradation eines jeden m{\"o}glichen Systemvorschlags antizipiert werden kann. Dadurch k{\"o}nnen Betriebs- und Wartungskosten vorausgesagt und minimiert werden und durch eine optimale Betriebs- und Wartungsstrategie die Verf{\"u}gbarkeit des Systems garantiert werden. Wesentliche Fragen bei der optimalen Auslegung des betrachteten hydrostatischen Getriebes sind dessen physikalische Modellierung, die Darstellung des Optimierungsproblems als gemischt-ganzzahliges lineares Programm, und dessen algorithmische Behandlung zur L{\"o}sungsfindung. Hierzu werden Heuristiken zum schnelleren Auffinden sinnvoller Systemtopologien vorgestellt und mittels mathematischer Dekomposition eine Bewertung des dynamischen Verschleiß- und Wartungsverlaufs m{\"o}glicher Systemvorschl{\"a}ge vorgenommen. Die Arbeit stellt die Optimierung technischer Systeme an der Schnittstelle von Mathematik, Informatik und Ingenieurwesen sowohl gr{\"u}ndlich als auch anschaulich und nachvollziehbar dar.},
  language  = {en}
}
@inproceedings{RauschLeiseEdereretal.2016,
  author    = {Rausch, Lea and Leise, Philipp and Ederer, Thorsten and Altherr, Lena and Pelz, Peter F.},
  title     = {A comparison of MILP and MINLP solver performance on the example of a drinking water supply system design problem},
  series = {ECCOMAS Congress 2016 VII European Congress on Computational Methods in Applied Sciences and Engineering},
  booktitle = {ECCOMAS Congress 2016 VII European Congress on Computational Methods in Applied Sciences and Engineering},
  editor    = {Papadrakakis, M. and Ppadopoulos, V. and Stefanou, G. and Plevris, V.},
  isbn      = {978-618-82844-0-1},
  pages     = {8509 -- 8527},
  year      = {2016},
  abstract  = {Finding a good system topology with more than a handful of components is a highly non-trivial task. The system needs to be able to fulfil all expected load cases, but at the same time the components should interact in an energy-efficient way. An example for a system design problem is the layout of the drinking water supply of a residential building. It may be reasonable to choose a design of spatially distributed pumps which are connected by pipes in at least two dimensions. This leads to a large variety of possible system topologies. To solve such problems in a reasonable time frame, the nonlinear technical characteristics must be modelled as simple as possible, while still achieving a sufficiently good representation of reality. The aim of this paper is to compare the speed and reliability of a selection of leading mathematical programming solvers on a set of varying model formulations. This gives us empirical evidence on what combinations of model formulations and solver packages are the means of choice with the current state of the art.},
  language  = {en}
}
@inproceedings{RauschFriesenAltherretal.2018,
  author    = {Rausch, Lea and Friesen, John and Altherr, Lena and Pelz, Peter F.},
  title     = {Using mixed-integer programming for the optimal design of water supply networks for slums},
  series = {Operations Research Proceedings 2017},
  booktitle = {Operations Research Proceedings 2017},
  editor    = {Kliewer, Natalia and Ehmke, Jan Fabian and Bornd{\"o}rfer, Ralf},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-319-89919-0 (Print)},
  doi       = {10.1007/978-3-319-89920-6_68},
  pages     = {509 -- 516},
  year      = {2018},
  abstract  = {The UN sets the goal to ensure access to water and sanitation for all people by 2030. To address this goal, we present a multidisciplinary approach for designing water supply networks for slums in large cities by applying mathematical optimization. The problem is modeled as a mixed-integer linear problem (MILP) aiming to find a network describing the optimal supply infrastructure. To illustrate the approach, we apply it on a small slum cluster in Dhaka, Bangladesh.},
  language  = {en}
}
@inproceedings{AltherrPelzEdereretal.2017,
  author    = {Altherr, Lena and Pelz, Peter F. and Ederer, Thorsten and Pfetsch, Marc E.},
  title     = {Optimale Getriebe auf Knopfdruck: Gemischt-ganzzahlige nichtlineare Optimierung zur Entscheidungsunterst{\"u}tzung bei der Auslegung von Getrieben f{\"u}r Kraftfahrzeuge},
  series = {Antriebstechnisches Kolloquium ATK 2017},
  booktitle = {Antriebstechnisches Kolloquium ATK 2017},
  editor    = {Jacobs, Georg},
  isbn      = {9783743148970},
  pages     = {313 -- 325},
  year      = {2017},
  language  = {de}
}
@book{Feuerriegel2021,
  author    = {Feuerriegel, Uwe},
  title     = {W{\"a}rme{\"u}bertragung mit EXCEL und VBA: W{\"a}rmetechnische Berechnungen und Simulationen effektiv durchf{\"u}hren und professionell dokumentieren},
  publisher = {Springer Vieweg},
  address   = {Wiesbaden},
  isbn      = {978-3-658-35905-8},
  doi       = {10.1007/978-3-658-35906-5},
  pages     = {XX, 439 Seiten},
  year      = {2021},
  abstract  = {Dieses Lehrbuch vermittelt die Grundlagen der W{\"a}rme{\"u}bertragung sowie den Umgang mit EXCEL-VBA von der Erstellung von Makros bis zu benutzerdefinierten Funktionen. Es legt damit eine Basis f{\"u}r die schnelle und professionelle Durchf{\"u}hrung von Berechnungen und Simulationen. Die angeleitete Erstellung von Berechnungsmodulen mit EXCEL und VBA aus allen wichtigen Bereichen der W{\"a}rme{\"u}bertragung bildet den inhaltlichen Schwerpunkt. Dazu z{\"a}hlen die station{\"a}re W{\"a}rmeleitung und der station{\"a}re W{\"a}rmedurchgang, die instation{\"a}re W{\"a}rmeleitung, der W{\"a}rme{\"u}bergang bei freier und erzwungener Konvektion sowie die W{\"a}rmestrahlung und der W{\"a}rme{\"u}bergang beim Kondensieren und Sieden. Soweit sinnvoll und m{\"o}glich werden die Stoffwertekorrelationen und die Berechnungsvorschriften aus dem VDI-W{\"a}rmeatlas verwendet. F{\"u}r ausgew{\"a}hlte Anwendungen werden zudem komplexere Auslegungen und Simulationen von Prozessen der W{\"a}rme{\"u}bertragung sowie von W{\"a}rme{\"u}bertragern erstellt. Die Zielgruppen: Studierende in Bachelor- und Masterstudieng{\"a}ngen, Praktiker im Engineering},
  language  = {de}
}
@incollection{LeiseAltherrPelz2018,
  author    = {Leise, Philipp and Altherr, Lena and Pelz, Peter F.},
  title     = {Energy-Efficient design of a water supply system for skyscrapers by mixed-integer nonlinear programming},
  series = {Operations Research Proceedings 2017},
  booktitle = {Operations Research Proceedings 2017},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-319-89919-0},
  doi       = {10.1007/978-3-319-89920-6_63},
  year      = {2018},
  abstract  = {The energy-efficiency of technical systems can be improved by a systematic design approach. Technical Operations Research (TOR) employs methods known from Operations Research to find a global optimal layout and operation strategy of technical systems. We show the practical usage of this approach by the systematic design of a decentralized water supply system for skyscrapers. All possible network options and operation strategies are modeled by a Mixed-Integer Nonlinear Program. We present the optimal system found by our approach and highlight the energy savings compared to a conventional system design.},
  language  = {en}
}
@inproceedings{LeiseAltherrPelz2018,
  author    = {Leise, Philipp and Altherr, Lena and Pelz, Peter F.},
  title     = {Technical Operations Research (TOR) - Algorithms, not Engineers, Design Optimal Energy Efficient and Resilient Cooling Systems},
  series = {FAN2018 - Proceedings of the International Conference on Fan Noise, Aerodynamics, Applications and Systems},
  booktitle = {FAN2018 - Proceedings of the International Conference on Fan Noise, Aerodynamics, Applications and Systems},
  pages     = {1 -- 12},
  year      = {2018},
  abstract  = {The overall energy efficiency of ventilation systems can be improved by considering not only single components, but by considering as well the interplay between every part of the system. With the help of the method "TOR" ("Technical Operations Research"), which was developed at the Chair of Fluid Systems at TU Darmstadt, it is possible to improve the energy efficiency of the whole system by considering all possible design choices programmatically. We show the ability of this systematic design approach with a ventilation system for buildings as a use case example. Based on a Mixed-Integer Nonlinear Program (MINLP) we model the ventilation system. We use binary variables to model the selection of different pipe diameters. Multiple fans are model with the help of scaling laws. The whole system is represented by a graph, where the edges represent the pipes and fans and the nodes represents the source of air for cooling and the sinks, that have to be cooled. At the beginning, the human designer chooses a construction kit of different suitable fans and pipes of different diameters and different load cases. These boundary conditions define a variety of different possible system topologies. It is not possible to consider all topologies by hand. With the help of state of the art solvers, on the other side, it is possible to solve this MINLP. Next to this, we also consider the effects of malfunctions in different components. Therefore, we show a first approach to measure the resilience of the shown example use case. Further, we compare the conventional approach with designs that are more resilient. These more resilient designs are derived by extending the before mentioned model with further constraints, that consider explicitly the resilience of the overall system. We show that it is possible to design resilient systems with this method already in the early design stage and compare the energy efficiency and resilience of these different system designs.},
  language  = {en}
}
@incollection{StengerAltherrMuelleretal.2018,
  author    = {Stenger, David and Altherr, Lena and M{\"u}ller, Tankred and Pelz, Peter F.},
  title     = {Product family design optimization using model-based engineering techniques},
  series = {Operations Research Proceedings 2017},
  booktitle = {Operations Research Proceedings 2017},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-319-89919-0},
  doi       = {10.1007/978-3-319-89920-6_66},
  pages     = {495 -- 502},
  year      = {2018},
  abstract  = {Highly competitive markets paired with tremendous production volumes demand particularly cost efficient products. The usage of common parts and modules across product families can potentially reduce production costs. Yet, increasing commonality typically results in overdesign of individual products. Multi domain virtual prototyping enables designers to evaluate costs and technical feasibility of different single product designs at reasonable computational effort in early design phases. However, savings by platform commonality are hard to quantify and require detailed knowledge of e.g. the production process and the supply chain. Therefore, we present and evaluate a multi-objective metamodel-based optimization algorithm which enables designers to explore the trade-off between high commonality and cost optimal design of single products.},
  language  = {en}
}
@inproceedings{LeiseAltherr2018,
  author    = {Leise, Philipp and Altherr, Lena},
  title     = {Optimizing the design and control of decentralized water supply systems - a case-study of a hotel building},
  series = {EngOpt 2018 Proceedings of the 6th International Conference on Engineering Optimization},
  booktitle = {EngOpt 2018 Proceedings of the 6th International Conference on Engineering Optimization},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-319-97773-7},
  doi       = {10.1007/978-3-319-97773-7_107},
  pages     = {1241 -- 1252},
  year      = {2018},
  abstract  = {To increase pressure to supply all floors of high buildings with water, booster stations, normally consisting of several parallel pumps in the basement, are used. In this work, we demonstrate the potential of a decentralized pump topology regarding energy savings in water supply systems of skyscrapers. We present an approach, based on Mixed-Integer Nonlinear Programming, that allows to choose an optimal network topology and optimal pumps from a predefined construction kit comprising different pump types. Using domain-specific scaling laws and Latin Hypercube Sampling, we generate different input sets of pump types and compare their impact on the efficiency and cost of the total system design. As a realistic application example, we consider a hotel building with 325 rooms, 12 floors and up to four pressure zones.},
  language  = {en}
}
@article{SunAltherrPeietal.2018,
  author    = {Sun, Hui and Altherr, Lena and Pei, Ji and Pelz, Peter F. and Yuan, Shouqi},
  title     = {Optimal booster station design and operation under uncertain load},
  series = {Applied Mechanics and Materials},
  volume    = {885},
  journal   = {Applied Mechanics and Materials},
  publisher = {Trans Tech Publications},
  address   = {B{\"a}ch},
  issn      = {1662-7482},
  doi       = {10.4028/www.scientific.net/AMM.885.102},
  pages     = {102 -- 115},
  year      = {2018},
  abstract  = {Given industrial applications, the costs for the operation and maintenance of a pump system typically far exceed its purchase price. For finding an optimal pump configuration which minimizes not only investment, but life-cycle costs, methods like Technical Operations Research which is based on Mixed-Integer Programming can be applied. However, during the planning phase, the designer is often faced with uncertain input data, e.g. future load demands can only be estimated. In this work, we deal with this uncertainty by developing a chance-constrained two-stage (CCTS) stochastic program. The design and operation of a booster station working under uncertain load demand are optimized to minimize total cost including purchase price, operation cost incurred by energy consumption and penalty cost resulting from water shortage. We find optimized system layouts using a sample average approximation (SAA) algorithm, and analyze the results for different risk levels of water shortage. By adjusting the risk level, the costs and performance range of the system can be balanced, and thus the system's resilience can be engineered},
  language  = {en}
}
@article{AltherrJoggerstLeiseetal.2018,
  author    = {Altherr, Lena and Joggerst, Laura and Leise, Philipp and Pfetsch, Marc E. and Schmitt, Andreas and Wendt, Janine},
  title     = {On obligations in the development process of resilient systems with algorithmic design methods},
  series = {Applied Mechanics and Materials},
  volume    = {885},
  journal   = {Applied Mechanics and Materials},
  number    = {885},
  publisher = {Trans Tech Publications},
  address   = {B{\"a}ch},
  isbn      = {1662-7482},
  doi       = {10.4028/www.scientific.net/AMM.885.240},
  pages     = {240 -- 252},
  year      = {2018},
  abstract  = {Advanced computational methods are needed both for the design of large systems and to compute high accuracy solutions. Such methods are efficient in computation, but the validation of results is very complex, and highly skilled auditors are needed to verify them. We investigate legal questions concerning obligations in the development phase, especially for technical systems developed using advanced methods. In particular, we consider methods of resilient and robust optimization. With these techniques, high performance solutions can be found, despite a high variety of input parameters. However, given the novelty of these methods, it is uncertain whether legal obligations are being met. The aim of this paper is to discuss if and how the choice of a specific computational method affects the developer's product liability. The review of legal obligations in this paper is based on German law and focuses on the requirements that must be met during the design and development process.},
  language  = {en}
}
@inproceedings{MuellerAltherrAholaetal.2019,
  author    = {M{\"u}ller, Tim M. and Altherr, Lena and Ahola, Marja and Schabel, Samuel and Pelz, Peter F.},
  title     = {Multi-Criteria optimization of pressure screen systems in paper recycling - balancing quality, yield, energy consumption and system complexity},
  series = {EngOpt 2018 Proceedings of the 6th International Conference on Engineering Optimization},
  booktitle = {EngOpt 2018 Proceedings of the 6th International Conference on Engineering Optimization},
  editor    = {Rodrigues, H. C.},
  publisher = {Springer International Publishing},
  address   = {Basel},
  isbn      = {978-3-319-97773-7},
  doi       = {10.1007/978-3-319-97773-7_105},
  year      = {2019},
  abstract  = {The paper industry is the industry with the third highest energy consumption in the European Union. Using recycled paper instead of fresh fibers for papermaking is less energy consuming and saves resources. However, adhesive contaminants in recycled paper are particularly problematic since they reduce the quality of the resulting paper-product. To remove as many contaminants and at the same time obtain as many valuable fibres as possible, fine screening systems, consisting of multiple interconnected pressure screens, are used. Choosing the best configuration is a non-trivial task: The screens can be interconnected in several ways, and suitable screen designs as well as operational parameters have to be selected. Additionally, one has to face conflicting objectives. In this paper, we present an approach for the multi-criteria optimization of pressure screen systems based on Mixed-Integer Nonlinear Programming. We specifically focus on a clear representation of the trade-off between different objectives.},
  language  = {en}
}
@article{AltherrEdererPfetschetal.2018,
  author    = {Altherr, Lena and Ederer, Thorsten and Pfetsch, Marc E. and Pelz, Peter F.},
  title     = {Maschinelles Design eines optimalen Getriebes},
  series = {ATZ - Automobiltechnische Zeitschrift},
  volume    = {120},
  journal   = {ATZ - Automobiltechnische Zeitschrift},
  number    = {10},
  publisher = {Springer Nature},
  address   = {Cham},
  isbn      = {2192-8800},
  doi       = {10.1007/s35148-018-0131-3},
  pages     = {72 -- 77},
  year      = {2018},
  abstract  = {Nahezu 100.000 denkbare Strukturen kann ein Getriebe bei gleicher Funktion aufweisen - je nach Ganganzahl und gefordertem Freiheitsgrad. Mit dem traditionellen Ansatz bei der Entwicklung, einzelne vielversprechende Systemkonfigurationen manuell zu identifizieren und zu vergleichen, k{\"o}nnen leicht innovative und vor allem kostenminimale L{\"o}sungen {\"u}bersehen werden. Im Rahmen eines Forschungsprojekts hat die TU Darmstadt spezielle Optimierungsmethoden angewendet, um auch bei großen L{\"o}sungsr{\"a}umen zielsicher ein f{\"u}r die individuellen Zielstellungen optimales Layout zu finden.},
  language  = {de}
}
@article{RauschFriesenAltherretal.2018,
  author    = {Rausch, Lea and Friesen, John and Altherr, Lena and Meck, Marvin and Pelz, Peter F.},
  title     = {A holistic concept to design optimal water supply infrastructures for informal settlements using remote sensing data},
  series = {Remote Sensing},
  volume    = {10},
  journal   = {Remote Sensing},
  number    = {2},
  publisher = {MDPI},
  address   = {Basel},
  isbn      = {2072-4292},
  doi       = {10.3390/rs10020216},
  pages     = {1 -- 23},
  year      = {2018},
  abstract  = {Ensuring access to water and sanitation for all is Goal No. 6 of the 17 UN Sustainability Development Goals to transform our world. As one step towards this goal, we present an approach that leverages remote sensing data to plan optimal water supply networks for informal urban settlements. The concept focuses on slums within large urban areas, which are often characterized by a lack of an appropriate water supply. We apply methods of mathematical optimization aiming to find a network describing the optimal supply infrastructure. Hereby, we choose between different decentral and central approaches combining supply by motorized vehicles with supply by pipe systems. For the purposes of illustration, we apply the approach to two small slum clusters in Dhaka and Dar es Salaam. We show our optimization results, which represent the lowest cost water supply systems possible. Additionally, we compare the optimal solutions of the two clusters (also for varying input parameters, such as population densities and slum size development over time) and describe how the result of the optimization depends on the entered remote sensing data.},
  language  = {en}
}
@inproceedings{LorenzAltherrPelz2019,
  author    = {Lorenz, Imke-Sophie B. and Altherr, Lena and Pelz, Peter F.},
  title     = {Graph-theoretic resilience analysis of a water distribution system's topology},
  series = {World Congress on Resilience, Reliability and Asset Management 2019},
  booktitle = {World Congress on Resilience, Reliability and Asset Management 2019},
  pages     = {106 -- 109},
  year      = {2019},
  abstract  = {Water suppliers are faced with the great challenge of achieving high-quality and, at the same time, low-cost water supply. In practice, the focus is set on the most beneficial maintenance measures and/or capacity adaptations of existing water distribution systems (WDS). Since climatic and demographic influences will pose further challenges in the future, the resilience enhancement of WDS, i.e. the enhancement of their capability to withstand and recover from disturbances, has been in particular focus recently. To assess the resilience of WDS, metrics based on graph theory have been proposed. In this study, a promising approach is applied to assess the resilience of the WDS for a district in a major German City. The conducted analysis provides insight into the process of actively influencing the resilience of WDS},
  language  = {en}
}
@inproceedings{LeiseBreuerAltherretal.2020,
  author    = {Leise, Philipp and Breuer, Tim and Altherr, Lena and Pelz, Peter F.},
  title     = {Development, validation and assessment of a resilient pumping system},
  series = {Proceedings of the Joint International Resilience Conference, JIRC2020},
  booktitle = {Proceedings of the Joint International Resilience Conference, JIRC2020},
  isbn      = {978-90-365-5095-6},
  pages     = {97 -- 100},
  year      = {2020},
  abstract  = {The development of resilient technical systems is a challenging task, as the system should adapt automatically to unknown disturbances and component failures. To evaluate different approaches for deriving resilient technical system designs, we developed a modular test rig that is based on a pumping system. On the basis of this example system, we present metrics to quantify resilience and an algorithmic approach to improve resilience. This approach enables the pumping system to automatically react on unknown disturbances and to reduce the impact of component failures. In this case, the system is able to automatically adapt its topology by activating additional valves. This enables the system to still reach a minimum performance, even in case of failures. Furthermore, timedependent disturbances are evaluated continuously, deviations from the original state are automatically detected and anticipated in the future. This allows to reduce the impact of future disturbances and leads to a more resilient system behaviour.},
  language  = {en}
}
@article{LeiseEsserEichenlaubetal.2021,
  author    = {Leise, Philipp and Eßer, Arved and Eichenlaub, Tobias and Schleiffer, Jean-Eric and Altherr, Lena and Rinderknecht, Stephan and Pelz, Peter F.},
  title     = {Sustainable system design of electric powertrains - comparison of optimization methods},
  series = {Engineering Optimization},
  journal   = {Engineering Optimization},
  publisher = {Taylor \& Francis},
  address   = {London},
  issn      = {0305-215X},
  doi       = {10.1080/0305215X.2021.1928660},
  year      = {2021},
  abstract  = {The transition within transportation towards battery electric vehicles can lead to a more sustainable future. To account for the development goal 'climate action' stated by the United Nations, it is mandatory, within the conceptual design phase, to derive energy-efficient system designs. One barrier is the uncertainty of the driving behaviour within the usage phase. This uncertainty is often addressed by using a stochastic synthesis process to derive representative driving cycles and by using cycle-based optimization. To deal with this uncertainty, a new approach based on a stochastic optimization program is presented. This leads to an optimization model that is solved with an exact solver. It is compared to a system design approach based on driving cycles and a genetic algorithm solver. Both approaches are applied to find efficient electric powertrains with fixed-speed and multi-speed transmissions. Hence, the similarities, differences and respective advantages of each optimization procedure are discussed.},
  language  = {en}
}
@inproceedings{Huening2021,
  author    = {H{\"u}ning, Felix},
  title     = {Sustainable changes beyond covid-19 for a second semester physics course for electrical engineering students},
  series = {Blended Learning in Engineering Education: challenging, enlightening - and lasting?},
  booktitle = {Blended Learning in Engineering Education: challenging, enlightening - and lasting?},
  isbn      = {978-2-87352-023-6},
  pages     = {1424 -- 1428},
  year      = {2021},
  abstract  = {The course Physics for Electrical Engineering is part of the curriculum of the bachelor program Electrical Engineering at University of Applied Science Aachen. Before covid-19 the course was conducted in a rather traditional way with all parts (lecture, exercise and lab) face-to-face. This teaching approach changed fundamentally within a week when the covid-19 limitations forced all courses to distance learning. All parts of the course were transformed to pure distance learning including synchronous and asynchronous parts for the lecture, live online-sessions for the exercises and self-paced labs at home. Using these methods, the course was able to impart the required knowledge and competencies. Taking the teacher's observations of the student's learning behaviour and engagement, the formal and informal feedback of the students and the results of the exams into account, the new methods are evaluated with respect to effectiveness, sustainability and suitability for competence transfer. Based on this analysis strong and weak points of the concept and countermeasures to solve the weak points were identified. The analysis further leads to a sustainable teaching approach combining synchronous and asynchronous parts with self-paced learning times that can be used in a very flexible manner for different learning scenarios, pure online, hybrid (mixture of online and presence times) and pure presence teaching.},
  language  = {en}
}
@inproceedings{UlmerBraunChengetal.2021,
  author    = {Ulmer, Jessica and Braun, Sebastian and Cheng, Chi-Tsun and Dowey, Steve and Wollert, J{\"o}rg},
  title     = {Adapting augmented reality systems to the users' needs using gamification and error solving methods},
  series = {Procedia CIRP - 54th CIRP CMS 2021 - Towards Digitalized Manufacturing 4.0},
  volume    = {104},
  booktitle = {Procedia CIRP - 54th CIRP CMS 2021 - Towards Digitalized Manufacturing 4.0},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {2212-8271},
  doi       = {10.1016/j.procir.2021.11.024},
  pages     = {140 -- 145},
  year      = {2021},
  abstract  = {Animations of virtual items in AR support systems are typically predefined and lack interactions with dynamic physical environments. AR applications rarely consider users' preferences and do not provide customized spontaneous support under unknown situations. This research focuses on developing adaptive, error-tolerant AR systems based on directed acyclic graphs and error resolving strategies. Using this approach, users will have more freedom of choice during AR supported work, which leads to more efficient workflows. Error correction methods based on CAD models and predefined process data create individual support possibilities. The framework is implemented in the Industry 4.0 model factory at FH Aachen.},
  language  = {en}
}
@incollection{MuellerAltherrAholaetal.2018,
  author    = {M{\"u}ller, Tim M. and Altherr, Lena and Ahola, Marja and Schabel, Samuel and Pelz, Peter F.},
  title     = {Optimizing pressure screen systems in paper recycling: optimal system layout, component selection and operation},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-18499-5},
  doi       = {10.1007/978-3-030-18500-8_44},
  pages     = {355 -- 361},
  year      = {2018},
  abstract  = {Around 60\% of the paper worldwide is made from recovered paper. Especially adhesive contaminants, so called stickies, reduce paper quality. To remove stickies but at the same time keep as many valuable fibers as possible, multi-stage screening systems with several interconnected pressure screens are used. When planning such systems, suitable screens have to be selected and their interconnection as well as operational parameters have to be defined considering multiple conflicting objectives. In this contribution, we present a Mixed-Integer Nonlinear Program to optimize system layout, component selection and operation to find a suitable trade-off between output quality and yield.},
  language  = {en}
}
@incollection{StengerAltherrAbel2019,
  author    = {Stenger, David and Altherr, Lena and Abel, Dirk},
  title     = {Machine learning and metaheuristics for black-box optimization of product families: a case-study investigating solution quality vs. computational overhead},
  series = {Operations Research Proceedings 2018},
  booktitle = {Operations Research Proceedings 2018},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-18499-5 (Print)},
  doi       = {10.1007/978-3-030-18500-8_47},
  pages     = {379 -- 385},
  year      = {2019},
  abstract  = {In product development, numerous design decisions have to be made. Multi-domain virtual prototyping provides a variety of tools to assess technical feasibility of design options, however often requires substantial computational effort for just a single evaluation. A special challenge is therefore the optimal design of product families, which consist of a group of products derived from a common platform. Finding an optimal platform configuration (stating what is shared and what is individually designed for each product) and an optimal design of all products simultaneously leads to a mixed-integer nonlinear black-box optimization model. We present an optimization approach based on metamodels and a metaheuristic. To increase computational efficiency and solution quality, we compare different types of Gaussian process regression metamodels adapted from the domain of machine learning, and combine them with a genetic algorithm. We illustrate our approach on the example of a product family of electrical drives, and investigate the trade-off between solution quality and computational overhead.},
  language  = {en}
}
@book{TruempenerPetersHerzeletal.2021,
  author    = {Tr{\"u}mpener, Nora and Peters, Jan and Herzel, Manuel and Vollmann, Alina and Breuer, Gina},
  title     = {Aachener Online-Schriften Wirtschaft und Recht. Band 3/2021},
  editor    = {Kroll-Ludwigs, Kathrin and Bassen-Metz, Yasmine and Eggert, Mathias and Fritz, Thomas and H{\"o}hne, Tim and Tran, Duc Hung and Vogt, J{\"u}rgen},
  publisher = {FH Aachen / Fachbereich Wirtschaftswissenschaften},
  address   = {Aachen},
  publisher      = {Fachhochschule Aachen},
  pages     = {304 Seiten},
  year      = {2021},
  abstract  = {Inhaltsverzeichnis 1. Die ordentliche K{\"u}ndigung chronisch Kranker im Anwendungsbereich des KSchG - Nora Tr{\"u}mpener 3-56 2. Die Legitimationswirkung der Gesellschafterliste - Erfolg trotz Grenzen? - Jan Peters 57-112 3. Marktmanipulation - Arten, Abgrenzung und gesetzliche Handhabe - Manuel Herzel 113-170 4. Die Zul{\"a}ssigkeit der Verdachtsk{\"u}ndigung im Arbeitsverh{\"a}ltnis - Alina Vollmann 171-248 5. Praxisorientierter Arbeitgeberleitfaden zur rechtssicheren Einf{\"u}hrung von Homeoffice im Arbeitsverh{\"a}ltnis - Gina Breuer 249-304},
  language  = {de}
}
@incollection{LeiseAltherrSimonetal.2019,
  author    = {Leise, Philipp and Altherr, Lena and Simon, Nicolai and Pelz, Peter F.},
  title     = {Finding global-optimal gearbox designs for battery electric vehicles},
  series = {Optimization of complex systems - theory, models, algorithms and applications : WCGO 2019},
  booktitle = {Optimization of complex systems - theory, models, algorithms and applications : WCGO 2019},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-21802-7},
  doi       = {10.1007/978-3-030-21803-4_91},
  pages     = {916 -- 925},
  year      = {2019},
  abstract  = {In order to maximize the possible travel distance of battery electric vehicles with one battery charge, it is mandatory to adjust all components of the powertrain carefully to each other. While current vehicle designs mostly simplify the powertrain rigorously and use an electric motor in combination with a gearbox with only one fixed transmission ratio, the use of multi-gear systems has great potential. First, a multi-speed system is able to improve the overall energy efficiency. Secondly, it is able to reduce the maximum momentum and therefore to reduce the maximum current provided by the traction battery, which results in a longer battery lifetime. In this paper, we present a systematic way to generate multi-gear gearbox designs that—combined with a certain electric motor—lead to the most efficient fulfillment of predefined load scenarios and are at the same time robust to uncertainties in the load. Therefore, we model the electric motor and the gearbox within a Mixed-Integer Nonlinear Program, and optimize the efficiency of the mechanical parts of the powertrain. By combining this mathematical optimization program with an unsupervised machine learning algorithm, we are able to derive global-optimal gearbox designs for practically relevant momentum and speed requirements.},
  language  = {en}
}
@inproceedings{MeckMuellerAltherretal.2020,
  author    = {Meck, Marvin M. and M{\"u}ller, Tim M. and Altherr, Lena and Pelz, Peter F.},
  title     = {Improving an industrial cooling system using MINLP, considering capital and operating costs},
  series = {Operations Research Proceedings 2019},
  booktitle = {Operations Research Proceedings 2019},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-48438-5 (Print)},
  doi       = {10.1007/978-3-030-48439-2_61},
  pages     = {505 -- 512},
  year      = {2020},
  abstract  = {The chemical industry is one of the most important industrial sectors in Germany in terms of manufacturing revenue. While thermodynamic boundary conditions often restrict the scope for reducing the energy consumption of core processes, secondary processes such as cooling offer scope for energy optimisation. In this contribution, we therefore model and optimise an existing cooling system. The technical boundary conditions of the model are provided by the operators, the German chemical company BASF SE. In order to systematically evaluate different degrees of freedom in topology and operation, we formulate and solve a Mixed-Integer Nonlinear Program (MINLP), and compare our optimisation results with the existing system.},
  language  = {en}
}
@inproceedings{MuellerSchmittLeiseetal.2021,
  author    = {M{\"u}ller, Tim M. and Schmitt, Andreas and Leise, Philipp and Meck, Tobias and Altherr, Lena and Pelz, Peter F. and Pfetsch, Marc E.},
  title     = {Validation of an optimized resilient water supply system},
  series = {Uncertainty in Mechanical Engineering},
  booktitle = {Uncertainty in Mechanical Engineering},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-77255-0},
  doi       = {10.1007/978-3-030-77256-7_7},
  pages     = {70 -- 80},
  year      = {2021},
  abstract  = {Component failures within water supply systems can lead to significant performance losses. One way to address these losses is the explicit anticipation of failures within the design process. We consider a water supply system for high-rise buildings, where pump failures are the most likely failure scenarios. We explicitly consider these failures within an early design stage which leads to a more resilient system, i.e., a system which is able to operate under a predefined number of arbitrary pump failures. We use a mathematical optimization approach to compute such a resilient design. This is based on a multi-stage model for topology optimization, which can be described by a system of nonlinear inequalities and integrality constraints. Such a model has to be both computationally tractable and to represent the real-world system accurately. We therefore validate the algorithmic solutions using experiments on a scaled test rig for high-rise buildings. The test rig allows for an arbitrary connection of pumps to reproduce scaled versions of booster station designs for high-rise buildings. We experimentally verify the applicability of the presented optimization model and that the proposed resilience properties are also fulfilled in real systems.},
  language  = {en}
}
@incollection{PfetschAbeleAltherretal.2021,
  author    = {Pfetsch, Marc E. and Abele, Eberhard and Altherr, Lena and B{\"o}lling, Christian and Br{\"o}tz, Nicolas and Dietrich, Ingo and Gally, Tristan and Geßner, Felix and Groche, Peter and Hoppe, Florian and Kirchner, Eckhard and Kloberdanz, Hermann and Knoll, Maximilian and Kolvenbach, Philip and Kuttich-Meinlschmidt, Anja and Leise, Philipp and Lorenz, Ulf and Matei, Alexander and Molitor, Dirk A. and Niessen, Pia and Pelz, Peter F. and Rexer, Manuel and Schmitt, Andreas and Schmitt, Johann M. and Schulte, Fiona and Ulbrich, Stefan and Weigold, Matthias},
  title     = {Strategies for mastering uncertainty},
  series = {Mastering uncertainty in mechanical engineering},
  booktitle = {Mastering uncertainty in mechanical engineering},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-78353-2},
  doi       = {10.1007/978-3-030-78354-9_6},
  pages     = {365 -- 456},
  year      = {2021},
  abstract  = {This chapter describes three general strategies to master uncertainty in technical systems: robustness, flexibility and resilience. It builds on the previous chapters about methods to analyse and identify uncertainty and may rely on the availability of technologies for particular systems, such as active components. Robustness aims for the design of technical systems that are insensitive to anticipated uncertainties. Flexibility increases the ability of a system to work under different situations. Resilience extends this characteristic by requiring a given minimal functional performance, even after disturbances or failure of system components, and it may incorporate recovery. The three strategies are described and discussed in turn. Moreover, they are demonstrated on specific technical systems.},
  language  = {en}
}
@article{ZabirovSchleserBucherer2021,
  author    = {Zabirov, Alexander and Schleser, Markus and Bucherer, Sebastian},
  title     = {F{\"u}ge- und Dichtkonzept f{\"u}r einen Leichtbauverbrennungsmotor},
  series = {adh{\"a}sion KLEBEN \& DICHTEN},
  volume    = {65},
  journal   = {adh{\"a}sion KLEBEN \& DICHTEN},
  number    = {11},
  publisher = {Springer Nature},
  address   = {Cham},
  issn      = {2192-8681},
  doi       = {10.1007/s35145-021-0531-5},
  pages     = {12 -- 19},
  year      = {2021},
  language  = {de}
}
@article{AltherrLeisePfetschetal.2018,
  author    = {Altherr, Lena and Leise, Philipp and Pfetsch, Marc E. and Schmitt, Andreas},
  title     = {Algorithmic design and resilience assessment of energy efficient high-rise water supply systems},
  series = {Applied Mechanics and Materials},
  volume    = {885},
  journal   = {Applied Mechanics and Materials},
  publisher = {Trans Tech Publications},
  address   = {B{\"a}ch},
  issn      = {1662-7482},
  doi       = {10.4028/www.scientific.net/AMM.885.211},
  pages     = {211 -- 223},
  year      = {2018},
  abstract  = {High-rise water supply systems provide water flow and suitable pressure in all levels of tall buildings. To design such state-of-the-art systems, the consideration of energy efficiency and the anticipation of component failures are mandatory. In this paper, we use Mixed-Integer Nonlinear Programming to compute an optimal placement of pipes and pumps, as well as an optimal control strategy.Moreover, we consider the resilience of the system to pump failures. A resilient system is able to fulfill a predefined minimum functionality even though components fail or are restricted in their normal usage. We present models to measure and optimize the resilience. To demonstrate our approach, we design and analyze an optimal resilient decentralized water supply system inspired by a real-life hotel building.},
  language  = {en}
}
@inproceedings{MuellerAltherrLeiseetal.2020,
  author    = {M{\"u}ller, Tim M. and Altherr, Lena and Leise, Philipp and Pelz, Peter F.},
  title     = {Optimization of pumping systems for buildings: Experimental validation of different degrees of model detail on a modular test rig},
  series = {Operations Research Proceedings 2019},
  booktitle = {Operations Research Proceedings 2019},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-48438-5},
  doi       = {10.1007/978-3-030-48439-2_58},
  pages     = {481 -- 488},
  year      = {2020},
  abstract  = {Successful optimization requires an appropriate model of the system under consideration. When selecting a suitable level of detail, one has to consider solution quality as well as the computational and implementation effort. In this paper, we present a MINLP for a pumping system for the drinking water supply of high-rise buildings. We investigate the influence of the granularity of the underlying physical models on the solution quality. Therefore, we model the system with a varying level of detail regarding the friction losses, and conduct an experimental validation of our model on a modular test rig. Furthermore, we investigate the computational effort and show that it can be reduced by the integration of domain-specific knowledge.},
  language  = {en}
}
@article{MuellerLeiseLorenzetal.2020,
  author    = {M{\"u}ller, Tim M. and Leise, Philipp and Lorenz, Imke-Sophie and Altherr, Lena and Pelz, Peter F.},
  title     = {Optimization and validation of pumping system design and operation for water supply in high-rise buildings},
  series = {Optimization and Engineering},
  volume    = {2021},
  journal   = {Optimization and Engineering},
  number    = {22},
  publisher = {Springer},
  issn      = {1573-2924},
  doi       = {10.1007/s11081-020-09553-4},
  pages     = {643 -- 686},
  year      = {2020},
  abstract  = {The application of mathematical optimization methods for water supply system design and operation provides the capacity to increase the energy efficiency and to lower the investment costs considerably. We present a system approach for the optimal design and operation of pumping systems in real-world high-rise buildings that is based on the usage of mixed-integer nonlinear and mixed-integer linear modeling approaches. In addition, we consider different booster station topologies, i.e. parallel and series-parallel central booster stations as well as decentral booster stations. To confirm the validity of the underlying optimization models with real-world system behavior, we additionally present validation results based on experiments conducted on a modularly constructed pumping test rig. Within the models we consider layout and control decisions for different load scenarios, leading to a Deterministic Equivalent of a two-stage stochastic optimization program. We use a piecewise linearization as well as a piecewise relaxation of the pumps' characteristics to derive mixed-integer linear models. Besides the solution with off-the-shelf solvers, we present a problem specific exact solving algorithm to improve the computation time. Focusing on the efficient exploration of the solution space, we divide the problem into smaller subproblems, which partly can be cut off in the solution process. Furthermore, we discuss the performance and applicability of the solution approaches for real buildings and analyze the technical aspects of the solutions from an engineer's point of view, keeping in mind the economically important trade-off between investment and operation costs.},
  language  = {en}
}
@inproceedings{GrundmannBauerBodenetal.2019,
  author    = {Grundmann, Jan Thimo and Bauer, Waldemar and Boden, Ralf and Ceriotti, Matteo and Chand, Suditi and Cordero, Federico and Dachwald, Bernd and Dumont, Etienne and Grimm, Christian D. and Heiligers, Jeannette and Herč{\´i}k, David and H{\´e}rique, Alain and Ho, Tra-Mi and Jahnke, Rico and Kofman, Wlodek and Lange, Caroline and Lichtenheldt, Roy and McInnes, Colin and Meß, Jan-Gerd and Mikschl, Tobias and Mikulz, Eugen and Montenegro, Sergio and Moore, Iain and Pelivan, Ivanka and Peloni, Alessandro and Plettemeier, Dirk and Quantius, Dominik and Reershemius, Siebo and Renger, Thomas and Riemann, Johannes and Rogez, Yves and Ruffer, Michael and Sasaki, Kaname and Schmitz, Nicole and Seboldt, Wolfgang and Seefeldt, Patric and Spietz, Peter and Spr{\"o}witz, Tom and Sznajder, Maciej and T{\´o}th, Norbert and Vergaaij, Merel and Viavattene, Giulia and Wejmo, Elisabet and Wiedemann, Carsten and Wolff, Friederike and Ziach, Christian},
  title     = {Flights are ten a sail - Re-use and commonality in the design and system engineering of small spacecraft solar sail missions with modular hardware for responsive and adaptive exploration},
  series = {70th International Astronautical Congress (IAC)},
  booktitle = {70th International Astronautical Congress (IAC)},
  isbn      = {9781713814856},
  pages     = {1 -- 7},
  year      = {2019},
  language  = {en}
}