@article{GoettenHavermannBraunetal.2020,
  author    = {G{\"o}tten, Falk and Havermann, Marc and Braun, Carsten and Marino, Matthew and Bil, Cees},
  title     = {Wind-tunnel and CFD investigations of UAV landing gears and turrets - Improvements in empirical drag estimation},
  series = {Aerospace Science and Technology},
  volume    = {107},
  journal   = {Aerospace Science and Technology},
  number    = {Art. 106306},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1270-9638},
  doi       = {10.1016/j.ast.2020.106306},
  year      = {2020},
  abstract  = {This paper analyzes the drag characteristics of several landing gear and turret configurations that are representative of unmanned aircraft tricycle landing gears and sensor turrets. A variety of these components were constructed via 3D-printing and analyzed in a wind-tunnel measurement campaign. Both turrets and landing gears were attached to a modular fuselage that supported both isolated components and multiple components at a time. Selected cases were numerically investigated with a Reynolds-averaged Navier-Stokes approach that showed good accuracy when compared to wind-tunnel data. The drag of main gear struts could be significantly reduced via streamlining their cross-sectional shape and keeping load carrying capabilities similar. The attachment of wheels introduced interference effects that increased strut drag moderately but significantly increased wheel drag compared to isolated cases. Very similar behavior was identified for front landing gears. The drag of an electro-optical and infrared sensor turret was found to be much higher than compared to available data of a clean hemisphere-cylinder combination. This turret drag was merely influenced by geometrical features like sensor surfaces and the rotational mechanism. The new data of this study is used to develop simple drag estimation recommendations for main and front landing gear struts and wheels as well as sensor turrets. These recommendations take geometrical considerations and interference effects into account.},
  language  = {en}
}
@article{MelissNeskakisUsbecketal.1994,
  author    = {Meliß, Michael and Neskakis, A. and Usbeck, S. and Wagner, L. and Wiediger, J{\"u}rgen},
  title     = {Wind-PV-Hybridsystem an der FH Aachen/J{\"u}lich},
  series = {Energiewirtschaftliche Tagesfragen. Jg. 44 (1994), H. 9 (special)},
  journal   = {Energiewirtschaftliche Tagesfragen. Jg. 44 (1994), H. 9 (special)},
  issn      = {0720-6240},
  pages     = {34 -- 40},
  year      = {1994},
  language  = {de}
}
@article{Gerhardt2006,
  author    = {Gerhardt, Hans Joachim},
  title     = {Wind- und Temperatureinfl{\"u}sse bei der Planung von Entrauchungseinrichtungen},
  series = {VFDB-Zeitschrift : Forschung, Technik und Management im Brandschutz. 55 (2006), H. 3},
  journal   = {VFDB-Zeitschrift : Forschung, Technik und Management im Brandschutz. 55 (2006), H. 3},
  isbn      = {0042-1804},
  pages     = {115 -- 121},
  year      = {2006},
  language  = {de}
}
@article{JungMuellerStaat2018,
  author    = {Jung, Alexander and M{\"u}ller, Wolfram and Staat, Manfred},
  title     = {Wind and fairness in ski jumping: A computer modelling analysis},
  series = {Journal of Biomechanics},
  journal   = {Journal of Biomechanics},
  number    = {75},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0021-9290},
  doi       = {10.1016/j.jbiomech.2018.05.001},
  pages     = {147 -- 153},
  year      = {2018},
  abstract  = {Wind is closely associated with the discussion of fairness in ski jumping. To counter-act its influence on the jump length, the International Ski Federation (FIS) has introduced a wind compensation approach. We applied three differently accurate computer models of the flight phase with wind (M1, M2, and M3) to study the jump length effects of various wind scenarios. The previously used model M1 is accurate for wind blowing in direction of the flight path, but inaccuracies are to be expected for wind directions deviating from the tangent to the flight path. M2 considers the change of airflow direction, but it does not consider the associated change in the angle of attack of the skis which additionally modifies drag and lift area time functions. M3 predicts the length effect for all wind directions within the plane of the flight trajectory without any mathematical simplification. Prediction errors of M3 are determined only by the quality of the input data: wind velocity, drag and lift area functions, take-off velocity, and weight. For comparing the three models, drag and lift area functions of an optimized reference jump were used. Results obtained with M2, which is much easier to handle than M3, did not deviate noticeably when compared to predictions of the reference model M3. Therefore, we suggest to use M2 in future applications. A comparison of M2 predictions with the FIS wind compensation system showed substantial discrepancies, for instance: in the first flight phase, tailwind can increase jump length, and headwind can decrease it; this is opposite of what had been anticipated before and is not considered in the current wind compensation system in ski jumping.},
  language  = {en}
}
@article{Schuermann1976,
  author    = {Sch{\"u}rmann, Wilhelm},
  title     = {Wilhelm Sch{\"u}rmann},
  series = {Kunstforum International},
  volume    = {1976},
  journal   = {Kunstforum International},
  number    = {18},
  publisher = {Kunstforum International},
  address   = {K{\"o}ln},
  pages     = {151 -- 156},
  year      = {1976},
  abstract  = {Geboren 1946, lebt und arbeitet in Aachen. Studium der Chemie an der Technischen Hochschule Aachen. Danach als freiberuflicher Photograph t{\"a}tig f{\"u}r verschiedene Tageszeitungen. Seit 1972 Lehrer f{\"u}r Photographie am Reiff Museum der TH-Aachen, Institut f{\"u}r Architektur. Seit 1973 Dozent f{\"u}r Photographie an der Volkshochschule Aachen. Ende 1973 Gr{\"u}ndung der Galerie Lichttropfen in Aachen. Organisator zahlreicher Ausstellungen historischer und zeitgen{\"o}ssischer Photographie im In- und Ausland.},
  language  = {de}
}
@article{Wollert1997,
  author    = {Wollert, J{\"o}rg},
  title     = {Wieviel Echtzeit kann Windows?},
  series = {IEE : elektrische Automatisierung und Antriebstechnik},
  volume    = {Jg. 42},
  journal   = {IEE : elektrische Automatisierung und Antriebstechnik},
  number    = {Nr. 9},
  issn      = {1434-2898},
  pages     = {30 -- 37},
  year      = {1997},
  language  = {de}
}
@article{Jochim2003,
  author    = {Jochim, Haldor E.},
  title     = {Wieviel d{\"u}rfen Versp{\"a}tungsgarantien kosten?},
  series = {Verkehrswissenschaftliche Tage der Hochschule f{\"u}r Verkehrswesen "Friedrich List" in Dresden / Technische Universit{\"a}t Dresden, Fakult{\"a}t Verkehrswissenschaften},
  journal   = {Verkehrswissenschaftliche Tage der Hochschule f{\"u}r Verkehrswesen "Friedrich List" in Dresden / Technische Universit{\"a}t Dresden, Fakult{\"a}t Verkehrswissenschaften},
  year      = {2003},
  language  = {de}
}
@article{Mang1998,
  author    = {Mang, Thomas},
  title     = {Wiederverwertung von Kunststoff-Verbundmaterial},
  series = {Chemie und Technologie makromolekularer Stoffe. 16. Kolloquium: 20. November 1998 an der FH Aachen, Fachbereich Chemieingenieurwesen},
  journal   = {Chemie und Technologie makromolekularer Stoffe. 16. Kolloquium: 20. November 1998 an der FH Aachen, Fachbereich Chemieingenieurwesen},
  publisher = {Fachhochschule Aachen},
  address   = {Aachen},
  pages     = {191 -- 213},
  year      = {1998},
  language  = {de}
}
@article{FredebeulKreinFreytag1998,
  author    = {Fredebeul-Krein, Markus and Freytag, Andreas},
  title     = {Wie umfassend ist die Liberalisierung der M{\"a}rkte f{\"u}r Telekommunikationsdienste? : Eine kritische Bewertung des WTO-Abkommen. / Markus Fredebeul-Krein ; Andreas Freytag},
  series = {Lernort Multimedia / hrsg. von Herbert Kubicek ...},
  journal   = {Lernort Multimedia / hrsg. von Herbert Kubicek ...},
  publisher = {v. Decker},
  address   = {Heidelberg},
  isbn      = {3-7685-3297-6},
  pages     = {318 -- 325},
  year      = {1998},
  language  = {de}
}
@article{ThielemannLuedtke1999,
  author    = {Thielemann, Frank and L{\"u}dtke, C.},
  title     = {Wie sich Logistikunternehmen ihren Platz sichern k{\"o}nnen},
  series = {Deutsche Verkehrs-Zeitung (DVZ) (1999)},
  journal   = {Deutsche Verkehrs-Zeitung (DVZ) (1999)},
  isbn      = {0342-166X},
  pages     = {42 -- 42},
  year      = {1999},
  language  = {de}
}
@article{FerreinLakemeyer2005,
  author    = {Ferrein, Alexander and Lakemeyer, Gerhard},
  title     = {Wie Roboter die Welt sehen : Roboterfußball im Dienst der Wissenschaft / Ferrein, Alexander ; Lakemeyer, Gerhard},
  series = {Bild und Erkenntnis : Formen und Funktionen des Bildes in Wissenschaft und Technik / RWTH. Andreas Beyer ; Markus Lohoff (Hrsg.)},
  journal   = {Bild und Erkenntnis : Formen und Funktionen des Bildes in Wissenschaft und Technik / RWTH. Andreas Beyer ; Markus Lohoff (Hrsg.)},
  publisher = {Deutscher Kunstverlag},
  address   = {M{\"u}nchen},
  isbn      = {3-422-06463-X},
  pages     = {360 -- 361},
  year      = {2005},
  language  = {de}
}
@article{Mayer1993,
  author    = {Mayer, Claudia},
  title     = {Wie national ist die Germanistik? Die Scheu der Literaturwissenschaft vor der eigenen Vergangenheit},
  series = {Frankfurter Rundschau. 159 (1993), H. 13.07.1993},
  journal   = {Frankfurter Rundschau. 159 (1993), H. 13.07.1993},
  pages     = {14 -- 14},
  year      = {1993},
  language  = {de}
}
@article{KerresSiekmann2017,
  author    = {Kerres, Karsten and Siekmann, Marko},
  title     = {Wie kommuniziere ich prognosegest{\"u}tzte Instandhaltungsstrategien erfolgreich in politischen Entscheidungsgremien?},
  series = {3 R. Fachzeitschrift f{\"u}r sichere und effiziente Rohleitungssysteme},
  journal   = {3 R. Fachzeitschrift f{\"u}r sichere und effiziente Rohleitungssysteme},
  number    = {12},
  publisher = {Vulkan-Verl.},
  address   = {Essen},
  issn      = {2191-9798},
  pages     = {47 -- 51},
  year      = {2017},
  language  = {de}
}
@article{Blome1989,
  author    = {Blome, Hans-Joachim},
  title     = {Wie funktionieren die aktiven Kerne der Galaxien?},
  series = {Naturwissenschaften. 76 (1989), H. 7},
  journal   = {Naturwissenschaften. 76 (1989), H. 7},
  isbn      = {0028-1042},
  pages     = {310 -- 317},
  year      = {1989},
  language  = {de}
}
@article{Baatz1979,
  author    = {Baatz, Udo},
  title     = {Wie erkennt man Rationalisierungsreserven im Konstruktionsbereich},
  series = {Das Jahrbuch f{\"u}r Ingeneure 79 : aktuelles Wissen aus Forschung u. Praxis / Bartz, Wilfried J.; Wippler, Elmar},
  journal   = {Das Jahrbuch f{\"u}r Ingeneure 79 : aktuelles Wissen aus Forschung u. Praxis / Bartz, Wilfried J.; Wippler, Elmar},
  publisher = {Expert-Verl.},
  address   = {Grafenau, W{\"u}rtt.},
  isbn      = {0171-3809},
  pages     = {263 -- 268},
  year      = {1979},
  language  = {de}
}
@article{ThielemannSchaffner1993,
  author    = {Thielemann, Frank and Schaffner, M.},
  title     = {Wie beurteilen die F{\"u}hrungskr{\"a}fte der Branche den derzeitigen und zuk{\"u}nftigen Innovationsdruck? Expertenmeinung zum Thema Innovationen in der Druckindustrie: M. Schaffner, F. Thielemann},
  series = {Management im innovatorischen Wandel : Arbeit und Technik in der Druckindustrie / Heinz-Reiner Treichel ; Kurt-Georg Ciesinger},
  journal   = {Management im innovatorischen Wandel : Arbeit und Technik in der Druckindustrie / Heinz-Reiner Treichel ; Kurt-Georg Ciesinger},
  publisher = {Polygraph-Verl.},
  address   = {Frankfurt am Main},
  isbn      = {3-87641-262-5},
  pages     = {21 -- 26},
  year      = {1993},
  language  = {de}
}
@article{Olbertz2021,
  author    = {Olbertz, Klaus},
  title     = {Wichtige arbeitsrechtliche Entwicklungen im Jahr 2020 : Der Jahresr{\"u}ckblick auf alles Wissenswerte im Arbeitsrecht des vergangenen Jahres},
  series = {NWB - Steuer- und Wirtschaftsrecht},
  journal   = {NWB - Steuer- und Wirtschaftsrecht},
  number    = {10},
  issn      = {0028-3460},
  pages     = {703 -- 715},
  year      = {2021},
  abstract  = {Im Anschluss an die arbeitsrechtlichen Jahres{\"u}bersichten der vergangenen Jahre (NWB 5/2019 S. 266; NWB 8/2020 S. 557) gibt der nachfolgende Beitrag einen {\"U}berblick {\"u}ber relevante Entwicklungen im Arbeitsrecht des Jahres 2020. Der erste Teil besch{\"a}ftigt sich hierbei mit gesetzlichen {\"A}nderungen. Neben Regelungen, die auf die COVID-19-Pandemie zur{\"u}ckgef{\"u}hrt werden k{\"o}nnen, hat der Gesetzgeber auch andere Vorhaben umgesetzt. So wurde u. a. das Arbeitnehmerentsenderecht reformiert. F{\"u}r Diskussionen sorgt(e) zudem das Gesetzesvorhaben zur Regelung mobiler Arbeit. Im zweiten Teil werden f{\"u}r die Praxis wichtige h{\"o}chstrichterliche Gerichtsentscheidungen zum Arbeitsrecht erl{\"a}utert, alphabetisch sortiert von A (wie Antidiskriminierungsrecht) bis U (wie Urlaub).},
  language  = {de}
}
@article{Laack2013,
  author    = {Laack, Walter van},
  title     = {Why natural constants are as they are},
  series = {British journal of arts and social sciences},
  volume    = {Vol. 15},
  journal   = {British journal of arts and social sciences},
  number    = {Nr. 2},
  publisher = {BritishJournal Publ. Inc},
  address   = {London},
  issn      = {2046-9578 (E-Journal)},
  pages     = {198 -- 203},
  year      = {2013},
  language  = {en}
}
@article{FerreinSchifferBooysenetal.2016,
  author    = {Ferrein, Alexander and Schiffer, Stefan and Booysen, T. and Stopforth, R.},
  title     = {Why it is harder to run RoboCup in South Africa: Experiences from German South African collaborations},
  series = {International Journal of Advanced Robotic Systems},
  volume    = {13},
  journal   = {International Journal of Advanced Robotic Systems},
  number    = {5},
  issn      = {1729-8806},
  doi       = {10.1177/1729881416662789},
  pages     = {1 -- 13},
  year      = {2016},
  abstract  = {Robots are widely used as a vehicle to spark interest in science and technology in learners. A number of initiatives focus on this issue, for instance, the Roberta Initiative, the FIRST Lego League, the World Robot Olympiad and RoboCup Junior. Robotic competitions are valuable not only for school learners but also for university students, as the RoboCup initiative shows. Besides technical skills, the students get some project exposure and experience what it means to finish their tasks on time. But qualifying students for future high-tech areas should not only be for students from developed countries. In this article, we present our experiences with research and education in robotics within the RoboCup initiative, in Germany and South Africa; we report on our experiences with trying to get the RoboCup initiative in South Africa going. RoboCup has a huge support base of academic institutions in Germany; this is not the case in South Africa. We present our 'north-south' collaboration initiatives in RoboCup between Germany and South Africa and discuss some of the reasons why we think it is harder to run RoboCup in South Africa.},
  language  = {en}
}
@article{TemizArtmannKayser2008,
  author    = {Temiz Artmann, Ayseg{\"u}l and Kayser, Peter},
  title     = {Why is Sepsis an Ongoing Clinical Challenge? Lipopolysaccharide Effects on Red Blood Cell Volume / Temiz, Ayseg{\"u}l ; Kayser, Peter},
  series = {Bioengineering in Cell and Tissue Research / Artmann, Gerhard M. ; Chien, Shu (Eds.)},
  journal   = {Bioengineering in Cell and Tissue Research / Artmann, Gerhard M. ; Chien, Shu (Eds.)},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {978-3-540-75408-4},
  pages     = {497 -- 508},
  year      = {2008},
  language  = {en}
}