@incollection{CzarneckiFettke2021,
  author    = {Czarnecki, Christian and Fettke, Peter},
  title     = {Robotic process automation : Positioning, structuring, and framing the work},
  series = {Robotic process automation : Management, technology, applications},
  booktitle = {Robotic process automation : Management, technology, applications},
  editor    = {Czarnecki, Christian and Fettke, Peter},
  publisher = {De Gruyter},
  address   = {Oldenbourg},
  isbn      = {978-3-11-067668-6 (Print)},
  doi       = {10.1515/9783110676693-202},
  pages     = {3 -- 24},
  year      = {2021},
  abstract  = {Robotic process automation (RPA) has attracted increasing attention in research and practice. This chapter positions, structures, and frames the topic as an introduction to this book. RPA is understood as a broad concept that comprises a variety of concrete solutions. From a management perspective RPA offers an innovative approach for realizing automation potentials, whereas from a technical perspective the implementation based on software products and the impact of artificial intelligence (AI) and machine learning (ML) are relevant. RPA is industry-independent and can be used, for example, in finance, telecommunications, and the public sector. With respect to RPA this chapter discusses definitions, related approaches, a structuring framework, a research framework, and an inside as well as outside architectural view. Furthermore, it provides an overview of the book combined with short summaries of each chapter.},
  language  = {en}
}
@incollection{CzarneckiHongSchmitzetal.2021,
  author    = {Czarnecki, Christian and Hong, Chin-Gi and Schmitz, Manfred and Dietze, Christian},
  title     = {Enabling digital transformation through cognitive robotic process automation at Deutsche Telekom Services Europe},
  series = {Digitalization Cases Vol. 2 : Mastering digital transformation for global business},
  booktitle = {Digitalization Cases Vol. 2 : Mastering digital transformation for global business},
  editor    = {Urbach, Nils and R{\"o}glinger, Maximilian and Kautz, Karlheinz and Alias, Rose Alinda and Saunders, Carol and Wiener, Martin},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-80002-4 (Print)},
  doi       = {10.1007/978-3-030-80003-1},
  pages     = {123 -- 138},
  year      = {2021},
  abstract  = {Subject of this case is Deutsche Telekom Services Europe (DTSE), a service center for administrative processes. Due to the high volume of repetitive tasks (e.g., 100k manual uploads of offer documents into SAP per year), automation was identified as an important strategic target with a high management attention and commitment. DTSE has to work with various backend application systems without any possibility to change those systems. Furthermore, the complexity of administrative processes differed. When it comes to the transfer of unstructured data (e.g., offer documents) to structured data (e.g., MS Excel files), further cognitive technologies were needed.},
  language  = {en}
}
@incollection{Dachwald2017,
  author    = {Dachwald, Bernd},
  title     = {Light propulsion systems for spacecraft},
  series = {Optical nano and micro actuator technology},
  booktitle = {Optical nano and micro actuator technology},
  editor    = {Knopf, George K. and Otani, Yukitoshi},
  publisher = {CRC Press},
  address   = {Boca Raton},
  isbn      = {9781315217628 (eBook)},
  pages     = {577 -- 598},
  year      = {2017},
  language  = {en}
}
@incollection{Dachwald2010,
  author    = {Dachwald, Bernd},
  title     = {Solar sail dynamics and control},
  series = {Encyclopedia of Aerospace Engineering},
  booktitle = {Encyclopedia of Aerospace Engineering},
  publisher = {Wiley},
  address   = {Hoboken},
  doi       = {10.1002/9780470686652.eae292},
  year      = {2010},
  abstract  = {Solar sails are large and lightweight reflective structures that are propelled by solar radiation pressure. This chapter covers their orbital and attitude dynamics and control. First, the advantages and limitations of solar sails are discussed and their history and development status is outlined. Because the dynamics of solar sails is governed by the (thermo-)optical properties of the sail film, the basic solar radiation pressure force models have to be described and compared before parameters to measure solar sail performance can be defined. The next part covers the orbital dynamics of solar sails for heliocentric motion, planetocentric motion, and motion at Lagrangian equilibrium points. Afterwards, some advanced solar radiation pressure force models are described, which allow to quantify the thrust force on solar sails of arbitrary shape, the effects of temperature, of light incidence angle, of surface roughness, and the effects of optical degradation of the sail film in the space environment. The orbital motion of a solar sail is strongly coupled to its rotational motion, so that the attitude control of these soft and flexible structures is very challenging, especially for planetocentric orbits that require fast attitude maneuvers. Finally, some potential attitude control methods are sketched and selection criteria are given.},
  language  = {en}
}
@incollection{DachwaldBoehnhardtBrojetal.2014,
  author    = {Dachwald, Bernd and Boehnhardt, Herrmann and Broj, Ulrich and Geppert, Ulrich R. M. E. and Grundmann, Jan-Thimo and Seboldt, Wolfgang and Seefeldt, Patric and Spietz, Peter and Johnson, Les and K{\"u}hrt, Ekkehard and Mottola, Stefano and Macdonald, Malcolm and McInnes, Colin R. and Vasile, Massimiliano and Reinhard, Ruedeger},
  title     = {Gossamer roadmap technology reference study for a multiple NEO Rendezvous Mission},
  series = {Advances in solar sailing},
  booktitle = {Advances in solar sailing},
  publisher = {Springer},
  address   = {Berlin [u.a.]},
  isbn      = {978-3-642-34906-5 (Print) ; 978-3-642-34907-2 (E-Book)},
  pages     = {211 -- 226},
  year      = {2014},
  abstract  = {A technology reference study for a multiple near-Earth object (NEO) rendezvous mission with solar sailcraft is currently carried out by the authors of this paper. The investigated mission builds on previous concepts, but adopts a strong micro-spacecraft philosophy based on the DLR/ESA Gossamer technology. The main scientific objective of the mission is to explore the diversity of NEOs. After direct interplanetary insertion, the solar sailcraft should—within less than 10 years—rendezvous three NEOs that are not only scientifically interesting, but also from the point of human spaceight and planetary defense. In this paper, the objectives of the study are outlined and a preliminary potential mission profile is presented.},
  language  = {en}
}
@incollection{DachwaldOhndorf2019,
  author    = {Dachwald, Bernd and Ohndorf, Andreas},
  title     = {Global optimization of continuous-thrust trajectories using evolutionary neurocontrol},
  series = {Modeling and Optimization in Space Engineering},
  booktitle = {Modeling and Optimization in Space Engineering},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-10501-3},
  doi       = {10.1007/978-3-030-10501-3_2},
  pages     = {33 -- 57},
  year      = {2019},
  abstract  = {Searching optimal continuous-thrust trajectories is usually a difficult and time-consuming task. The solution quality of traditional optimal-control methods depends strongly on an adequate initial guess because the solution is typically close to the initial guess, which may be far from the (unknown) global optimum. Evolutionary neurocontrol attacks continuous-thrust optimization problems from the perspective of artificial intelligence and machine learning, combining artificial neural networks and evolutionary algorithms. This chapter describes the method and shows some example results for single- and multi-phase continuous-thrust trajectory optimization problems to assess its performance. Evolutionary neurocontrol can explore the trajectory search space more exhaustively than a human expert can do with traditional optimal-control methods. Especially for difficult problems, it usually finds solutions that are closer to the global optimum. Another fundamental advantage is that continuous-thrust trajectories can be optimized without an initial guess and without expert supervision.},
  language  = {en}
}
@incollection{DachwaldUlamecBiele2013,
  author    = {Dachwald, Bernd and Ulamec, Stephan and Biele, Jens},
  title     = {Clean in situ subsurface exploration of icy environments in the solar system},
  series = {Habitability of other planets and satellites. - (Cellular origin, life in extreme habitats and astrobiology ; 28)},
  booktitle = {Habitability of other planets and satellites. - (Cellular origin, life in extreme habitats and astrobiology ; 28)},
  publisher = {Springer},
  address   = {Dordrecht},
  isbn      = {978-94-007-6545-0 (Druckausgabe)},
  pages     = {367 -- 397},
  year      = {2013},
  abstract  = {"To assess the habitability of the icy environments in the solar system, for example, on Mars, Europa, and Enceladus, the scientific analysis of material embedded in or underneath their ice layers is very important. We consider self-steering robotic ice melting probes to be the best method to cleanly access these environments, that is, in compliance with planetary protection standards. The required technologies are currently developed and tested."},
  language  = {en}
}
@incollection{DachwaldUlamecKowalskietal.2023,
  author    = {Dachwald, Bernd and Ulamec, Stephan and Kowalski, Julia and Boxberg, Marc S. and Baader, Fabian and Biele, Jens and K{\"o}mle, Norbert},
  title     = {Ice melting probes},
  series = {Handbook of Space Resources},
  booktitle = {Handbook of Space Resources},
  editor    = {Badescu, Viorel and Zacny, Kris and Bar-Cohen, Yoseph},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-97912-6 (Print)},
  doi       = {10.1007/978-3-030-97913-3_29},
  pages     = {955 -- 996},
  year      = {2023},
  abstract  = {The exploration of icy environments in the solar system, such as the poles of Mars and the icy moons (a.k.a. ocean worlds), is a key aspect for understanding their astrobiological potential as well as for extraterrestrial resource inspection. On these worlds, ice melting probes are considered to be well suited for the robotic clean execution of such missions. In this chapter, we describe ice melting probes and their applications, the physics of ice melting and how the melting behavior can be modeled and simulated numerically, the challenges for ice melting, and the required key technologies to deal with those challenges. We also give an overview of existing ice melting probes and report some results and lessons learned from laboratory and field tests.},
  language  = {en}
}
@incollection{DautzenbergGrossRenz1996,
  author    = {Dautzenberg, H. and Groß, Rolf Fritz and Renz, Ulrich},
  title     = {Meßtechnik auf dem Pr{\"u}fstand: Forschung zur Heißgasfiltration},
  series = {Virtuelle Instrumente in der Praxis. Begleitband zum Kongress VIP 1996},
  booktitle = {Virtuelle Instrumente in der Praxis. Begleitband zum Kongress VIP 1996},
  editor    = {Jamal, Rahman},
  publisher = {National Instruments Germany},
  address   = {M{\"u}nchen},
  pages     = {202 -- 208},
  year      = {1996},
  abstract  = {Im Rahmen von Forschungsvorhaben des BMBF und verschiedener Industriepartner betreibt der Lehrstuhl f{\"u}r W{\"a}rme{\"u}bertragung und Klimatechnik der RWTH Aachen Pilotanlagen und Pr{\"u}fst{\"a}nde f{\"u}r Untersuchungen auf dem Gebiet der Heißgasfiltration mit keramischen Filterelementen. Als wesentlicher Garant f{\"u}r den Erfolg der Forschungsarbeit muß die auf das jeweilige Projekt genau abgestimmte Meß- und Regelungstechnik angesehen werden. Hierbei z{\"a}hlt neben der Auswahl geeigneter Hardwarekomponenten auch die Softwareentwicklung unter einer leistungsstarken und zuverl{\"a}ssigen Programmierumgebung. Anhand des Aufbaus dreier Versuchsanlagen im Technikumsmaßstab soll das Anforderungsprofil an die Meßtechnik bis hin zur Umsetzung innerhalb der Anlage skizziert werden. Der Heißgasfiltrationspr{\"u}fstand im Heizkraftwerk der RWTH Aachen dient der Beobachtung des Reinigungsverhaltens keramischer Filterelemente bei der Heißgasentstaubung im Temperaturbereich bis 850 Grad C. Wesentlich f{\"u}r die Meßwerterfassung ist hierbei die Kopplung eines Orion-Datenloggers der Firma Schlumberger mit LabView 4.0. Im Hochtemperaturofen des Lehrstuhls werden instation{\"a}re Druckmessungen an einer keramischen Filterkerze w{\"a}hrend eines Abreinigungsimpulses bei 950 Grad C mit hoher Samplingrate durchgef{\"u}hrt. Hierbei {\"u}bernimmt eine durch LabView 4.0 angesteuerte E-Series Karte der Firma National Instruments die Signalaufnahme. Die katalytische Schadstoffreduktion und Entstaubung heißer Rauchgase bei 900 Grad C sind Ziele der Untersuchungen in einer erstellten Versuchsanlage mit einem Quarzglasreaktor. Die Signalerfassung und -konditionierung erfolgt {\"u}ber SCXI in Verbindung mit LabView 4.0, die Steuerung der Anlage {\"u}bernehmen zwei Multifunktionskarten (National Instruments).},
  language  = {de}
}
@incollection{DiekmannEggert2021,
  author    = {Diekmann, Julian and Eggert, Mathias},
  title     = {Is a Progressive Web App an Alternative for Native App Development?},
  series = {3. Wissenschaftsforum: Digitale Transformation (WiFo21) (Lecture Notes in Informatics ; P-319)},
  booktitle = {3. Wissenschaftsforum: Digitale Transformation (WiFo21) (Lecture Notes in Informatics ; P-319)},
  publisher = {Gesellschaft f{\"u}r Informatik},
  address   = {Darmstadt},
  isbn      = {978-3-88579-713-5},
  pages     = {35 -- 48},
  year      = {2021},
  abstract  = {The existence of several mobile operating systems, such as Android and iOS, is a challenge for developers because the individual platforms are not compatible with each other and require separate app developments. For this reason, cross-platform approaches have become popular but lack in cloning the native behavior of the different operating systems. Out of the plenty cross-platform approaches, the progressive web app (PWA) approach is perceived as promising but needs further investigation. Therefore, the paper at hand aims at investigating whether PWAs are a suitable alternative for native apps by developing a PWA clone of an existing app. Two surveys are conducted in which potential users test and evaluate the PWA prototype with regard to its usability. The survey results indicate that PWAs have great potential, but cannot be treated as a general alternative to native apps. For guiding developers when and how to use PWAs, four design guidelines for the development of PWA-based apps are derived based on the results.},
  language  = {en}
}