@article{NehrBausCinaretal.2024,
  author    = {Nehr, Sascha and Baus, Lukas and {\c{C}}inar, Hasan and Elsen, Ingo and Frauenrath, Tobias},
  title     = {Indoor environmental quality assessment in passively ventilated classrooms in Germany and estimation of ventilation energy losses},
  series = {Journal of Building Engineering},
  volume    = {97},
  journal   = {Journal of Building Engineering},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {2352-7102},
  pages     = {20 Seiten},
  year      = {2024},
  abstract  = {In this field study we present an approach for the comprehensive and room-specific assessment of parameters with the overall aim to realize energy-efficient provision of hygienically harmless and thermally comfortable indoor environmental quality in naturally ventilated non-residential buildings. The approach is based on (i) conformity assessment of room design parameters, (ii) empirical determination of theoretically expected occupant-specific supply air flow rates and corresponding air exchange rates, (iii) experimental determination of real occupant-specific supply air flow rates and corresponding air exchange rates, (iv) measurement of indoor environmental exposure conditions of T, RH, cCO2 , cPM2.5 and cTVOC, and (v) determination of real energy demands for the prevailing ventilation scheme. Underlying assessment criteria comprise the indoor environmental parameters of category II of EN 16798-1: Temperature T = 20 ◦C-24 ◦C, and relative humidity RH = 25 \%-60 \% as well as the guide values of the German Federal Environment Agency for cCO2 cPM2.5 and cTVOC of 1000 ppm, 15 μg m⁻³, and 1 mg m ⁻³, respectively. Investigation objects are six naturally ventilated classrooms of a German secondary school. Major factors influencing indoor environmental quality in these classrooms are the specific room volume per occupant and the window opening area. It is concluded that the rigorous implementation of ventilation recommendations laid down by the German Federal Environment Agency is ineffective with respect to anticipated indoor environmental parameters and inefficient with respect to ventilation energy losses on the order of about 10 kWh m⁻² a ⁻¹ to 30 kWh m⁻² a ⁻¹.},
  language  = {en}
}
@incollection{HarlacherAltepostElsenetal.2024,
  author    = {Harlacher, Markus and Altepost, Andrea and Elsen, Ingo and Ferrein, Alexander and Hansen-Ampah, Adjan and Merx, Wolfgang and Niehues, Sina and Schiffer, Stefan and Shahinfar, Fatemeh Nasim},
  title     = {Approach for the identification of requirements on the design of AI-supported work systems (in problem-based projects)},
  series = {AI in Business and Economics},
  booktitle = {AI in Business and Economics},
  editor    = {Lausberg, Isabel and Vogelsang, Michael},
  publisher = {De Gruyter},
  address   = {Berlin},
  isbn      = {9783110790320},
  doi       = {10.1515/9783110790320},
  pages     = {87 -- 99},
  year      = {2024},
  abstract  = {To successfully develop and introduce concrete artificial intelligence (AI) solutions in operational practice, a comprehensive process model is being tested in the WIRKsam joint project. It is based on a methodical approach that integrates human, technical and organisational aspects and involves employees in the process. The chapter focuses on the procedure for identifying requirements for a work system that is implementing AI in problem-driven projects and for selecting appropriate AI methods. This means that the use case has already been narrowed down at the beginning of the project and must be completely defined in the following. Initially, the existing preliminary work is presented. Based on this, an overview of all procedural steps and methods is given. All methods are presented in detail and good practice approaches are shown. Finally, a reflection of the developed procedure based on the application in nine companies is given.},
  language  = {en}
}
@article{SanchezCespedesLeasureTejedorGaravitoetal.2023,
  author    = {Sanchez-Cespedes, Lina Maria and Leasure, Douglas Ryan and Tejedor-Garavito, Natalia and Amaya Cruz, Glenn Harry and Garcia Velez, Gustavo Adolfo and Mendoza Beltr{\´a}n, Andryu Enrique and Mar{\´i}n-Salazar, Yenny Andrea and Esch, Thomas and Tatem, Andrew J. and Ospina Boh{\´o}rquez, Mariana Francisca},
  title     = {Social cartography and satellite-derived building coverage for post-census population estimates in difficult-to-access regions of Colombia},
  series = {Population studies : a Journal of Demography},
  volume    = {78},
  journal   = {Population studies : a Journal of Demography},
  number    = {1},
  publisher = {Taylor \& Francis},
  address   = {London},
  issn      = {1477-4747},
  doi       = {10.1080/00324728.2023.2190151},
  pages     = {3 -- 20},
  year      = {2023},
  abstract  = {Effective government services rely on accurate population numbers to allocate resources. In Colombia and globally, census enumeration is challenging in remote regions and where armed conflict is occurring. During census preparations, the Colombian National Administrative Department of Statistics conducted social cartography workshops, where community representatives estimated numbers of dwellings and people throughout their regions. We repurposed this information, combining it with remotely sensed buildings data and other geospatial data. To estimate building counts and population sizes, we developed hierarchical Bayesian models, trained using nearby full-coverage census enumerations and assessed using 10-fold cross-validation. We compared models to assess the relative contributions of community knowledge, remotely sensed buildings, and their combination to model fit. The Community model was unbiased but imprecise; the Satellite model was more precise but biased; and the Combination model was best for overall accuracy. Results reaffirmed the power of remotely sensed buildings data for population estimation and highlighted the value of incorporating local knowledge.},
  language  = {en}
}
@article{RakeEnningKurthetal.1994,
  author    = {Rake, Heinrich and Enning, Manfred and Kurth, Johannes and Schr{\"o}der, Walter},
  title     = {Automatic uncoupler completes automation at the hump},
  series = {RGI - Railway Gazette International},
  volume    = {150},
  journal   = {RGI - Railway Gazette International},
  number    = {6},
  publisher = {Reed Business},
  address   = {Sutton},
  issn      = {0373-5346},
  pages     = {371 -- 374},
  year      = {1994},
  language  = {en}
}
@article{RakeSchwanhaeusserFrederichetal.1993,
  author    = {Rake, Heinrich and Schwanh{\"a}ußer, Wulf and Frederich, Fritz and Enning, Manfred},
  title     = {Automatisierung von Ablaufanlagen mit dem Kupplungsroboter},
  series = {ETR - Eisenbahntechnische Rundschau},
  journal   = {ETR - Eisenbahntechnische Rundschau},
  number    = {4},
  publisher = {DVV Media Group},
  address   = {Hamburg},
  issn      = {0013-2845},
  pages     = {249 -- 254},
  year      = {1993},
  language  = {de}
}
@inproceedings{EnningHilgers2023,
  author    = {Enning, Manfred and Hilgers, Rudolf},
  title     = {Die Assistierte Bremsprobe als Br{\"u}cke zur Vollautomatisierung des Schieneng{\"u}terverkehrs},
  series = {IRSA 2023: Tagungsband, Proceedings},
  booktitle = {IRSA 2023: Tagungsband, Proceedings},
  editor    = {Nießen, Nils and Schindler, Christian},
  publisher = {RWTH Aachen},
  address   = {Aachen},
  doi       = {10.18154/RWTH-2024-00257},
  pages     = {60 -- 75},
  year      = {2023},
  language  = {de}
}
@article{ManfredMaySutter2020,
  author    = {Manfred, Enning and May, J{\"o}rg and Sutter, Stefan},
  title     = {Innovation am G{\"u}terwagen am Beispiel der Automatischen Bremsprobe},
  series = {ETR - Eisenbahntechnische Rundschau},
  journal   = {ETR - Eisenbahntechnische Rundschau},
  number    = {12},
  publisher = {DVV Media Group},
  address   = {Hamburg},
  issn      = {0013-2845},
  pages     = {14 -- 19},
  year      = {2020},
  abstract  = {Mit der Digitalen Automatischen Kupplung beginnt ein neues Kapitel des Schieneng{\"u}terverkehrs, in dem zusammengestellte Wagen sich automatisch in wenigen Minuten abfahrbereit machen, ohne dass der Mensch eingreifen muss. Eines des gr{\"o}ßten Hemmnisse der umweltfreundlichen Schiene wird dann entfallen. Notwendig ist jetzt eine Diskussion {\"u}ber den Umfang und die Systemgrenzen der Automatischen Bremsprobe.},
  language  = {de}
}
@article{EnningSchmidtWilbring2019,
  author    = {Enning, Manfred and Schmidt, Bernd and Wilbring, Daniela},
  title     = {Auf dem Weg zur autonomen Anschlussbedienung},
  series = {Privatbahn-Magazin},
  journal   = {Privatbahn-Magazin},
  number    = {3},
  publisher = {Bahn Media},
  address   = {Suhlendorf},
  issn      = {1865-0163},
  pages     = {40 -- 43},
  year      = {2019},
  language  = {de}
}
@inproceedings{PfaffSchmidtWilbringetal.2019,
  author    = {Pfaff, Raphael and Schmidt, Bernd and Wilbring, Daniela and Franzen, Julian},
  title     = {Wagon4.0 - the smart wagon for improved integration into Industry 4.0 plants},
  series = {Proceedings of the International Heavy Haul Association STS Conference 2019},
  booktitle = {Proceedings of the International Heavy Haul Association STS Conference 2019},
  pages     = {7 Seiten},
  year      = {2019},
  abstract  = {In many instances, freight vehicles exchange load or information with plants that are or will soon be Industry4.0 plants. The Wagon4.0 concept, as developed in close cooperation with e.g. port or mine operations, offers a maximum in railway operational efficiency while providing strong business cases already in the respective plant interaction. The Wagon4.0 consists of main components, a power supply, data network, sensors, actuators and an operating system, the so called WagonOS. The Wagon OS is implemented in a granular, self-sufficient manner, to allow basic features such as WiFi-Mesh and train christening in remote areas without network connection. Furthermore, the granularity of the operating system allows to extend the familiar app concept to freight rail rolling stock, making it possible to use specialised actuators for certain applications, e.g. an electrical parking brake or an auxiliary drive. In order to facilitate migration to the Wagon4.0 for existing fleets, a migration concept featuring five levels of technical adaptation was developed. The present paper investigates the benefits of Wagon4.0-implementations for the particular challenges of heavy haul operations by focusing on train christening, ep-assisted braking, autonomous last mile and traction boost operation as well as improved maintenance schedules},
  language  = {en}
}
@inproceedings{WilbringEnningPfaffetal.2019,
  author    = {Wilbring, Daniela and Enning, Manfred and Pfaff, Raphael and Schmidt, Bernd},
  title     = {Neue Perspektiven f{\"u}r die Bahn in der Produktions- und Distributionslogistik durch Prozessautomation},
  series = {IRSA 2019: Tagungsband, Proceedings},
  booktitle = {IRSA 2019: Tagungsband, Proceedings},
  editor    = {de Doncker, Rik W. and Nießen, Nils and Schindler, Christian},
  publisher = {RWTH Aachen},
  address   = {Aachen},
  doi       = {10.18154/RWTH-2020-00014},
  pages     = {128 -- 142},
  year      = {2019},
  abstract  = {Deutschland braucht mehr Eisenbahn um CO2-Emissionen aus dem Verkehr zu reduzieren. Sie muss zum R{\"u}ckgrat aktueller Logistikprozesse, z.B. bei Kaufmannsg{\"u}tern und E-Commerce, werden. Dies geht nicht ohne neuartige betriebliche Konzepte und eine Transformation des G{\"u}terwagens von einem „dummen St{\"u}ck Stahl" zu einem modernen Werkzeug der Logistik. Als „G{\"u}terwagen 4.0" wird ein kommunikativer und kooperativer G{\"u}terwagen verstanden, der die Voraussetzung zur Automatisierung aller Prozesse der Zugvorbereitung bereitstellt, sich aber ansonsten vollkommen kompatibel mit heutigen Betriebsverfahren im Hauptlauf pr{\"a}sentiert. Durch Kommunikation zwischen G{\"u}terwagen und umgebenden intelligenten Systemen im Sinne eines „Internet der Dinge" gelingt damit unter Anderem die Realisierung hoch effizienter Gleisanschlussverkehre, die der G{\"u}terbahn neue M{\"a}rkte abseits der klassisch bahn-affinen Verkehre erschließen und letztlich den Wandel zu einer nachhaltigen G{\"u}termobilit{\"a}t f{\"o}rdern.},
  language  = {de}
}
@article{EnningPfaff2017,
  author    = {Enning, Manfred and Pfaff, Raphael},
  title     = {G{\"u}terwagen 4.0 - Mehr als nur technischer Fortschritt},
  series = {Privatbahn-Magazin},
  journal   = {Privatbahn-Magazin},
  number    = {2},
  publisher = {Bahn Media},
  address   = {Suhlendorf},
  issn      = {1865-0163},
  pages     = {21 -- 25},
  year      = {2017},
  abstract  = {Lokomotiven sind dank modernster Konzepte der Antriebstechnik heute energiesparend und umweltfreundlich. Eine Ausr{\"u}stung mit Telematik und Assistenzfunktionen ist Standard. Auf der Strecke zeigt sich moderne Technik in Form elektronischer Stellwerke und Zugsicherungssysteme und in Rangier- und Abstellanlagen als EOW-Technik. Am G{\"u}terwagen hingegen ist der technische Fortschritt komplett vorbeigegangen. Auch beim modernsten Wagen (Abb. 1) ist die einzige „Automatik"-Funktion die zentral {\"u}ber die Hauptluftleitung (HL) versorgte und bet{\"a}tigte Luftbremse.},
  language  = {de}
}
@article{EnningPfaff2016,
  author    = {Enning, Manfred and Pfaff, Raphael},
  title     = {Digitalisierung bringt mehr G{\"u}ter auf die Schiene},
  series = {Sonderprojekte ATM/MTZ},
  volume    = {21},
  journal   = {Sonderprojekte ATM/MTZ},
  number    = {6 (suppl.)},
  publisher = {Springer Fachmedien},
  address   = {Wiesbaden},
  issn      = {2509-4610},
  doi       = {10.1007/s41491-016-0570-7},
  pages     = {34 -- 37},
  year      = {2016},
  language  = {de}
}
@inproceedings{StarkBartelDitscheetal.2023,
  author    = {Stark, Ralf and Bartel, Sebastian and Ditsche, Florian and Esch, Thomas},
  title     = {Design study of a 30kN LOX/LCH4 aerospike rocket engine for lunar lander application},
  series = {Aerospace Europe Conference 2023 - 10th EUCASS - 9th CEAS},
  booktitle = {Aerospace Europe Conference 2023 - 10th EUCASS - 9th CEAS},
  pages     = {9 Seiten},
  year      = {2023},
  abstract  = {Based on lunar lander concept EL3, various LOX/CH4 aerospike engines were studied. A distinction was made between single and cluster configurations as well as ideal and non-ideal contour concepts. It could be shown that non-ideal aerospike engines promise a significant payload gain.},
  language  = {en}
}
@inproceedings{StarkRiepingEsch2023,
  author    = {Stark, Ralf and Rieping, Carla and Esch, Thomas},
  title     = {The impact of guide tubes on flow separation in rocket nozzles},
  series = {Aerospace Europe Conference 2023 - 10th EUCASS - 9th CEAS},
  booktitle = {Aerospace Europe Conference 2023 - 10th EUCASS - 9th CEAS},
  pages     = {8 Seiten},
  year      = {2023},
  abstract  = {Rocket engine test facilities and launch pads are typically equipped with a guide tube. Its purpose is to ensure the controlled and safe routing of the hot exhaust gases. In addition, the guide tube induces a suction that effects the nozzle flow, namely the flow separation during transient start-up and shut-down of the engine. A cold flow subscale nozzle in combination with a set of guide tubes was studied experimentally to determine the main influencing parameters.},
  language  = {en}
}
@article{SchopenNarayanBeckmannetal.2024,
  author    = {Schopen, Oliver and Narayan, Sriram and Beckmann, Marvin and Najmi, Aezid-Ul-Hassan and Esch, Thomas and Shabani, Bahman},
  title     = {An EIS approach to quantify the effects of inlet air relative humidity on the performance of proton exchange membrane fuel cells: a pathway to developing a novel fault diagnostic method},
  series = {International Journal of Hydrogen Energy},
  volume    = {58},
  journal   = {International Journal of Hydrogen Energy},
  number    = {8},
  publisher = {Elsevier},
  address   = {Amsterdam},
  isbn      = {0360-3199 (print)},
  issn      = {1879-3487 (online)},
  doi       = {10.1016/j.ijhydene.2024.01.218},
  pages     = {1302 -- 1315},
  year      = {2024},
  abstract  = {In this work, the effect of low air relative humidity on the operation of a polymer electrolyte membrane fuel cell is investigated. An innovative method through performing in situ electrochemical impedance spectroscopy is utilised to quantify the effect of inlet air relative humidity at the cathode side on internal ionic resistances and output voltage of the fuel cell. In addition, algorithms are developed to analyse the electrochemical characteristics of the fuel cell. For the specific fuel cell stack used in this study, the membrane resistance drops by over 39 \% and the cathode side charge transfer resistance decreases by 23 \% after increasing the humidity from 30 \% to 85 \%, while the results of static operation also show an increase of ∼2.2 \% in the voltage output after increasing the relative humidity from 30 \% to 85 \%. In dynamic operation, visible drying effects occur at < 50 \% relative humidity, whereby the increase of the air side stoichiometry increases the drying effects. Furthermore, other parameters, such as hydrogen humidification, internal stack structure, and operating parameters like stoichiometry, pressure, and temperature affect the overall water balance. Therefore, the optimal humidification range must be determined by considering all these parameters to maximise the fuel cell performance and durability. The results of this study are used to develop a health management system to ensure sufficient humidification by continuously monitoring the fuel cell polarisation data and electrochemical impedance spectroscopy indicators.},
  language  = {en}
}
@misc{MachadoDahmannKeimeretal.2020,
  author    = {Machado, Patricia Almeida and Dahmann, Peter and Keimer, Jona and Saretzki, Charlotte and St{\"u}bing, Felix and K{\"u}pper, Thomas},
  title     = {Stress profile and individual workload monitoring in general aviation pilots - an experiment's setting},
  series = {23. Annual Meeting of the German Society of Travel Medicine, Coburg, 18.-19.9.2020},
  journal   = {23. Annual Meeting of the German Society of Travel Medicine, Coburg, 18.-19.9.2020},
  doi       = {10.55225/hppa.156},
  year      = {2020},
  language  = {en}
}
@misc{MayntzKeimerTegtmeyeretal.2021,
  author    = {Mayntz, Joscha and Keimer, Jona and Tegtmeyer, Philipp and Dahmann, Peter and Hille, Sebastian and Stumpf, Eike and Fisher, Alex and Dorrington, Graham},
  title     = {Aerodynamic Investigation on Efficient Inflight Transition of a Propeller from Propulsion to Regeneration Mode},
  series = {AIAA SCITECH 2022 Forum},
  journal   = {AIAA SCITECH 2022 Forum},
  publisher = {AIAA},
  address   = {Reston, Va.},
  doi       = {10.2514/6.2022-0546},
  year      = {2021},
  abstract  = {This paper discusses a new way of inflight power regeneration for electric or hybrid-electric driven general aviation aircraft with one powertrain for both configurations. Three different approaches for the shift from propulsion to regeneration mode are analyzed. Numerical cal-culation and wind tunnel results are compared and show the highest regeneration potential for the "Windmill" approach, where the propeller blades are flipped, and rotation is reversed. A combination of all regeneration approaches for a realistic flight mission is discussed.},
  language  = {en}
}
@article{SaretzkiBergmannDahmannetal.2021,
  author    = {Saretzki, Charlotte and Bergmann, Ole and Dahmann, Peter and Janser, Frank and Keimer, Jona and Machado, Patricia and Morrison, Audry and Page, Henry and Pluta, Emil and St{\"u}bing, Felix and K{\"u}pper, Thomas},
  title     = {Are small airplanes safe with regards to COVID-19 transmission?},
  series = {Journal of Travel Medicine},
  volume    = {28},
  journal   = {Journal of Travel Medicine},
  number    = {7},
  publisher = {Oxford University Press},
  address   = {Oxford},
  issn      = {1708-8305},
  doi       = {10.1093/jtm/taab105},
  year      = {2021},
  language  = {en}
}
@misc{KeimerGirbigMayntzetal.2022,
  author    = {Keimer, Jona and Girbig, Leo and Mayntz, Joscha and Tegtmeyer, Philipp and Wendland, Frederik and Dahman, Peter and Fisher, Alex and Dorrington, Graham},
  title     = {Flight mission optimization for eco-efficiency in consideration of electric regeneration and atmospheric conditions},
  series = {AIAA AVIATION 2022 Forum},
  journal   = {AIAA AVIATION 2022 Forum},
  publisher = {AIAA},
  address   = {Reston, Va.},
  doi       = {10.2514/6.2022-4118},
  year      = {2022},
  abstract  = {The development and operation of hybrid or purely electrically powered aircraft in regional air mobility is a significant challenge for the entire aviation sector. This technology is expected to lead to substantial advances in flight performance, energy efficiency, reliability, safety, noise reduction, and exhaust emissions. Nevertheless, any consumed energy results in heat or carbon dioxide emissions and limited electric energy storage capabilities suppress commercial use. Therefore, the significant challenges to achieving eco-efficient aviation are increased aircraft efficiency, the development of new energy storage technologies, and the optimization of flight operations. Two major approaches for higher eco-efficiency are identified: The first one, is to take horizontal and vertical atmospheric motion phenomena into account. Where, in particular, atmospheric waves hold exciting potential. The second one is the use of the regeneration ability of electric aircraft. The fusion of both strategies is expected to improve efficiency. The objective is to reduce energy consumption during flight while not neglecting commercial usability and convenient flight characteristics. Therefore, an optimized control problem based on a general aviation class aircraft has to be developed and validated by flight experiments. The formulated approach enables a development of detailed knowledge of the potential and limitations of optimizing flight missions, considering the capability of regeneration and atmospheric influences to increase efficiency and range.},
  language  = {en}
}
@article{ThomaGardiFisheretal.2024,
  author    = {Thoma, Andreas and Gardi, Alessandro and Fisher, Alex and Braun, Carsten},
  title     = {Improving local path planning for UAV flight in challenging environments by refining cost function weights},
  series = {CEAS Aeronautical Journal},
  journal   = {CEAS Aeronautical Journal},
  publisher = {Springer},
  address   = {Wien},
  issn      = {1869-5590 (eISSN)},
  doi       = {10.1007/s13272-024-00741-x},
  pages     = {12 Seiten},
  year      = {2024},
  abstract  = {Unmanned Aerial Vehicles (UAV) constantly gain in versatility. However, more reliable path planning algorithms are required until full autonomous UAV operation is possible. This work investigates the algorithm 3DVFH* and analyses its dependency on its cost function weights in 2400 environments. The analysis shows that the 3DVFH* can find a suitable path in every environment. However, a particular type of environment requires a specific choice of cost function weights. For minimal failure, probability interdependencies between the weights of the cost function have to be considered. This dependency reduces the number of control parameters and simplifies the usage of the 3DVFH*. Weights for costs associated with vertical evasion (pitch cost) and vicinity to obstacles (obstacle cost) have the highest influence on the failure probability of the local path planner. Environments with mainly very tall buildings (like large American city centres) require a preference for horizontal avoidance manoeuvres (achieved with high pitch cost weights). In contrast, environments with medium-to-low buildings (like European city centres) benefit from vertical avoidance manoeuvres (achieved with low pitch cost weights). The cost of the vicinity to obstacles also plays an essential role and must be chosen adequately for the environment. Choosing these two weights ideal is sufficient to reduce the failure probability below 10\%.},
  language  = {en}
}