@inproceedings{SeboldtDachwald2003, author = {Seboldt, Wolfgang and Dachwald, Bernd}, title = {Solar sails for near-term advanced scientific deep space missions}, series = {Proceedings of the 8th International Workshop on Combustion and Propulsion}, booktitle = {Proceedings of the 8th International Workshop on Combustion and Propulsion}, pages = {14 Seiten}, year = {2003}, abstract = {Solar sails are propelled in space by reflecting solar photons off large mirroring surfaces, thereby transforming the momentum of the photons into a propulsive force. This innovative concept for low-thrust space propulsion works without any propellant and thus provides a wide range of opportunities for highenergy low-cost missions. Offering an efficient way of propulsion, solar sailcraft could close a gap in transportation options for highly demanding exploration missions within our solar system and even beyond. On December 17th, 1999, a significant step was made towards the realization of this technology: a lightweight solar sail structure with an area of 20 m × 20 m was successfully deployed on ground in a large facility at the German Aerospace Center (DLR) at Cologne. The deployment from a package of 60 cm × 60 cm × 65 cm with a total mass of less than 35 kg was achieved using four extremely light-weight carbon fiber reinforced plastics (CFRP) booms with a specific mass of 100 g/m. The paper briefly reviews the basic principles of solar sails as well as the technical concept and its realization in the ground demonstration experiment, performed in close cooperation between DLR and ESA. Next possible steps are outlined. They could comprise the in-orbit demonstration of the sail deployment on the upper stage of a low-cost rocket and the verification of the propulsion concept by an autonomous and free flying solar sail in the frame of a scientific mission. It is expected that the present design could be extended to sail sizes of about (40 m)2 up to even (70 m)2 without significant mass penalty. With these areas, the maximum achievable thrust at 1 AU would range between 10 and 40 mN - comparable to some electric thrusters. Such prototype sails with a mass between 50 and 150 kg plus a micro-spacecraft of 50 to 250 kg would have a maximum acceleration in the order of 0.1 mm/s2 at 1 AU, corresponding to a maximum ∆V-capability of about 3 km/s per year. Two near/medium-term mission examples to a near-Earth asteroid (NEA) will be discussed: a rendezvous mission and a sample return mission.}, language = {en} } @inproceedings{ButenwegKuhlmannLopezetal.2003, author = {Butenweg, Christoph and Kuhlmann, Winfried and Lopez, M. and Fernandez, S.}, title = {Seismic vulnerability assessment of the Aachen Cathedral based on measurements and numerical simulations}, series = {International Conference on Earthquake Engineering to mark 40 years from Catastrophic 1963 Skopje Earthquake, Skopje 2003}, booktitle = {International Conference on Earthquake Engineering to mark 40 years from Catastrophic 1963 Skopje Earthquake, Skopje 2003}, organization = {International conference in earthquake engineering to mark 40 years from catastrophic 1963 Skopje earthquake <2003, Skopje>}, pages = {1 -- 8}, year = {2003}, language = {en} } @inproceedings{KonradChudobaButenwegetal.2003, author = {Konrad, M. and Chudoba, Rostislav and Butenweg, Christoph and Bruckermann, O.}, title = {Textile reinforced concrete. Part II: Multi-level modeling concept}, series = {Digital proceedings / IKM 2003, proceedings 16th International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering [Elektronische Ressource : 10. - 12. Juni 2003, Weimar] / Bauhaus-Universit{\"a}t Weimar. Ed.: K. G{\"u}rlebeck; L. Hempel; C. K{\"o}nke}, booktitle = {Digital proceedings / IKM 2003, proceedings 16th International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering [Elektronische Ressource : 10. - 12. Juni 2003, Weimar] / Bauhaus-Universit{\"a}t Weimar. Ed.: K. G{\"u}rlebeck; L. Hempel; C. K{\"o}nke}, publisher = {IKM}, address = {Weimar}, organization = {Internationales Kolloquium {\"u}ber Anwendungen der Informatik und Mathematik in Architektur und Bauwesen <16, 2003, Weimar>}, pages = {1 -- 11}, year = {2003}, language = {en} } @inproceedings{ChudobaButenwegPfeiffer2003, author = {Chudoba, Rostislav and Butenweg, Christoph and Pfeiffer, Frank}, title = {Textile reinforced concrete. Part I: Process model for collaborative research and development}, series = {Digital proceedings / IKM 2003, proceedings 16th International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering [Elektronische Ressource : 10. - 12. Juni 2003, Weimar] / Bauhaus-Universit{\"a}t Weimar. Ed.: K. G{\"u}rlebeck; L. Hempel; C. K{\"o}nke}, booktitle = {Digital proceedings / IKM 2003, proceedings 16th International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering [Elektronische Ressource : 10. - 12. Juni 2003, Weimar] / Bauhaus-Universit{\"a}t Weimar. Ed.: K. G{\"u}rlebeck; L. Hempel; C. K{\"o}nke}, publisher = {IKM}, address = {Weimar}, organization = {Internationales Kolloquium {\"u}ber Anwendungen der Informatik und Mathematik in Architektur und Bauwesen <16, 2003, Weimar>}, pages = {1 -- 8}, year = {2003}, language = {en} } @inproceedings{VedralWollert2003, author = {Vedral, Andreas and Wollert, J{\"o}rg}, title = {Ansatz eines dienstorientierten Ad-Hoc netzwerkf{\"a}higen Bluetooth-Netzwerks mit CORBA-Schnittstelle f{\"u}r drahtgebundene und drahtlose Netzwerke}, series = {Bluetooth : 4. Kongress, Dortmund, 29. - 30 Januar 2003}, booktitle = {Bluetooth : 4. Kongress, Dortmund, 29. - 30 Januar 2003}, pages = {1 -- 13}, year = {2003}, language = {de} } @inproceedings{Wollert2003, author = {Wollert, J{\"o}rg}, title = {Einsatz von Wireless Technologien im Kraftfahrzeug}, series = {Sichere Datenkommunikation im Automobil : Kongress ; 18. - 19. November 2003, Radisson SAS Hotel, K{\"o}ln}, booktitle = {Sichere Datenkommunikation im Automobil : Kongress ; 18. - 19. November 2003, Radisson SAS Hotel, K{\"o}ln}, address = {K{\"o}ln}, organization = {ESCAR-Tagung <2003, K{\"o}ln>}, pages = {Getr. Z{\"a}hlung}, year = {2003}, language = {de} } @inproceedings{Wollert2003, author = {Wollert, J{\"o}rg}, title = {Ein Low-Power Bordrechner als Kommunikationsgateway f{\"u}r den Automotive-Bereich}, series = {Bluetooth : 4. Kongress, Dortmund, 29. - 30 Januar 2003}, booktitle = {Bluetooth : 4. Kongress, Dortmund, 29. - 30 Januar 2003}, publisher = {Mesago Messe Frankfurt GmbH}, address = {Stuttgart}, pages = {1 -- 9}, year = {2003}, language = {de} } @inproceedings{Wollert2003, author = {Wollert, J{\"o}rg}, title = {Wireless-Technologie - eine neue Chance f{\"u}r lokationsbezogene Dienste}, series = {SPS/IPC/DRIVES 2003 : SPS/IPC/DRIVES/Elektrische Automatisierung - Systeme und Komponenten, Fachmesse \& Kongress 25. - 27. Nov. 2003, N{\"u}rnberg ; [Tagungsband]}, booktitle = {SPS/IPC/DRIVES 2003 : SPS/IPC/DRIVES/Elektrische Automatisierung - Systeme und Komponenten, Fachmesse \& Kongress 25. - 27. Nov. 2003, N{\"u}rnberg ; [Tagungsband]}, publisher = {VDE-Verl.}, address = {Berlin [u.a.]}, isbn = {3-8007-2793-5}, pages = {253 -- 260}, year = {2003}, language = {de} } @inproceedings{MathiakPlescherWillnecker2003, author = {Mathiak, Gerhard and Plescher, Engelbert and Willnecker, Rainer}, title = {Parabolic flight experiments about vibrational effects on diffusion experiments}, series = {54th International Astronautical Congress of the International Astronautical Federation (IAF) : Bremen, 29 Sept. 2003 through 3 Oct. 2003 ; vol. 1}, booktitle = {54th International Astronautical Congress of the International Astronautical Federation (IAF) : Bremen, 29 Sept. 2003 through 3 Oct. 2003 ; vol. 1}, organization = {International Astronautical Congress of the International Astronautical Federation <54, 2003, Bremen>}, pages = {4389 -- 4396}, year = {2003}, language = {de} } @inproceedings{YoshinobuSchoeningFingeretal.2003, author = {Yoshinobu, T. and Sch{\"o}ning, Michael Josef and Finger, F. and Moritz, W. and Iwasaki, H.}, title = {Thin-film a-Si LAPS : Preparation and pH sensitivity}, series = {Eurosensors XVII : the 17th European Conference on Solid-State Transducers ; University of Minho, Guimar{\~a}es, Portugal, September 21 - 24, 2003}, booktitle = {Eurosensors XVII : the 17th European Conference on Solid-State Transducers ; University of Minho, Guimar{\~a}es, Portugal, September 21 - 24, 2003}, pages = {88 -- 89}, year = {2003}, language = {en} }