@article{GerhardtKramerJanssen1985, author = {Gerhardt, Hans Joachim and Kramer, C. and Janssen, L.-J.}, title = {Flow studies of an open jet wind tunnel and comparison with closed and slotted walls}, pages = {7 -- 28}, year = {1985}, language = {en} } @book{GerhardtKramer1983, author = {Gerhardt, Hans Joachim and Kramer, Carl}, title = {Windlasten auf nach innen geneigten Dachfl{\"a}chen}, publisher = {IRB-Verl.}, address = {Stuttgart}, pages = {17, [11] Bl. : graph. Darst.}, year = {1983}, language = {de} } @book{GerhardtKramer1982, author = {Gerhardt, Hans Joachim and Kramer, Carl}, title = {Untersuchungen zur Lagesicherung von Flachd{\"a}chern mittels Kies- und Plattenabdeckungen}, publisher = {IRB-Verl.}, address = {Stuttgart}, pages = {26, [18] S. : Ill., graph. Darst.}, year = {1982}, language = {de} } @book{GerhardtKramerJansen1977, author = {Gerhardt, Hans Joachim and Kramer, Carl and Jansen, Hubert}, title = {Traglufthallen unter Windbelastung}, publisher = {Westdt. Verl.}, address = {Opladen}, isbn = {3-531-02650-X}, pages = {39 S. : Ill., graph. Darst.}, year = {1977}, language = {de} } @article{GerhardtKrueger2000, author = {Gerhardt, Hans Joachim and Kr{\"u}ger, O.}, title = {Experimentelle Untersuchungen zur Entrauchung großer R{\"a}ume unter besonderer Beachtung des Windeinflusses}, series = {vfdb-Zeitschrift. 49 (2000), H. 2}, journal = {vfdb-Zeitschrift. 49 (2000), H. 2}, isbn = {0042-1804}, pages = {47 -- 54}, year = {2000}, language = {de} } @article{GerhardtKrueger1997, author = {Gerhardt, Hans Joachim and Kr{\"u}ger, O.}, title = {Building shape influence on local wind loads}, series = {Proceedings of the 2nd European \& African Conference on Wind Engineering : 2 EACWE, Palazzo Ducale, Genova, Italy, June 22-26, 1997 / ed. by Giovanni Solari. - Vol. 2}, journal = {Proceedings of the 2nd European \& African Conference on Wind Engineering : 2 EACWE, Palazzo Ducale, Genova, Italy, June 22-26, 1997 / ed. by Giovanni Solari. - Vol. 2}, publisher = {Servizi Grafici Editoriali}, address = {Padova}, isbn = {88-86281-19-6}, pages = {XIX, S. 1017 - 1998 : Ill., graph. Darst.}, year = {1997}, language = {en} } @article{GerhardtLieb2005, author = {Gerhardt, Hans Joachim and Lieb, R.-D.}, title = {Entrauchung komplexer R{\"a}umlichkeiten : Strategien und Steuerungen}, series = {T{\"u}r-Tor-Fenster-Report : Fachzeitschrift f{\"u}r die Technologien von T{\"u}ren, Toren und Fenstern. 25 (2005), H. 3}, journal = {T{\"u}r-Tor-Fenster-Report : Fachzeitschrift f{\"u}r die Technologien von T{\"u}ren, Toren und Fenstern. 25 (2005), H. 3}, isbn = {0724-7702}, pages = {27 -- 29}, year = {2005}, language = {de} } @article{GerhardtRudolph2000, author = {Gerhardt, Hans Joachim and Rudolph, M.}, title = {Steuerungsstrategien f{\"u}r Fensterbet{\"a}tigungen von Hochh{\"a}usern. Nat{\"u}rliche L{\"u}ftung}, series = {HLH - Heizung, L{\"u}ftung, Klima, Haustechnik. 51 (2000), H. 9}, journal = {HLH - Heizung, L{\"u}ftung, Klima, Haustechnik. 51 (2000), H. 9}, isbn = {1436-5103}, pages = {48 -- 52}, year = {2000}, language = {de} } @article{GerhardtSchmidtJung2002, author = {Gerhardt, Hans Joachim and Schmidt, G. and Jung, G.}, title = {Rauchversuch in einem Hochregallager}, series = {Bautechnik. 79 (2002), H. 6}, journal = {Bautechnik. 79 (2002), H. 6}, isbn = {0932-8351}, pages = {414 -- 417}, year = {2002}, language = {de} } @article{GerhardtSchwarz2003, author = {Gerhardt, Hans Joachim and Schwarz, N.}, title = {Entrauchung {\"u}ber Seitenw{\"a}nde}, series = {vfdb-Zeitschrift. 52 (2003), H. 1}, journal = {vfdb-Zeitschrift. 52 (2003), H. 1}, isbn = {0042-1804}, pages = {25 -- 35}, year = {2003}, language = {de} } @article{GerhardtSchoenwald2002, author = {Gerhardt, Hans Joachim and Sch{\"o}nwald, J.}, title = {Eine neue Brandsimulationsvorrichtung}, series = {vfdb-Zeitschrift. 51 (2002), H. 3}, journal = {vfdb-Zeitschrift. 51 (2002), H. 3}, isbn = {0042-1804}, pages = {91 -- 93}, year = {2002}, language = {de} } @article{GerhardtSchoenwaldForssmannetal.2005, author = {Gerhardt, Hans Joachim and Sch{\"o}nwald, J. and Forßmann, R. and Große, Wolfgang}, title = {Modulation der Windenergie durch optimierte Uferbepflanzung zur Steuerung der Oberfl{\"a}chenstr{\"o}mung f{\"u}r das Entfernung von Treibgut}, series = {Der F{\"u}hlinger See : Beitr{\"a}ge zur Erhaltung der {\"o}kologischen Qualit{\"a}t / hrsg. von Wolfgang Große ... - ({\"O}kologie und nachhaltige Entwicklung von Sport- und Freizeitseen ; 1)}, journal = {Der F{\"u}hlinger See : Beitr{\"a}ge zur Erhaltung der {\"o}kologischen Qualit{\"a}t / hrsg. von Wolfgang Große ... - ({\"O}kologie und nachhaltige Entwicklung von Sport- und Freizeitseen ; 1)}, publisher = {Monsenstein und Vannerdat}, address = {M{\"u}nster}, isbn = {3-86582-212-6}, pages = {95 -- 108}, year = {2005}, language = {de} } @article{GerhardtSchoenwaldKonrath2007, author = {Gerhardt, Hans Joachim and Sch{\"o}nwald, J. and Konrath, B.}, title = {Verwendung von Leichtgas bei Brandsimulationen - unzul{\"a}ssig oder sinnvoll?}, series = {VFDB-Zeitschrift : Forschung, Technik und Management im Brandschutz. 56 (2007), H. 1}, journal = {VFDB-Zeitschrift : Forschung, Technik und Management im Brandschutz. 56 (2007), H. 1}, isbn = {0042-1804}, pages = {29 -- 31}, year = {2007}, language = {de} } @article{GerhardtWacker1999, author = {Gerhardt, Hans Joachim and Wacker, J.}, title = {Immissionsprognosen auf der Basis von Windkanaluntersuchungen}, series = {Immissionsschutz. 4 (1999), H. 3}, journal = {Immissionsschutz. 4 (1999), H. 3}, isbn = {1430-9262}, pages = {84 -- 89}, year = {1999}, language = {de} } @article{GermanMikuckiWelchetal.2021, author = {German, Laura and Mikucki, Jill A. and Welch, Susan A. and Welch, Kathleen A. and Lutton, Anthony and Dachwald, Bernd and Kowalski, Julia and Heinen, Dirk and Feldmann, Marco and Francke, Gero and Espe, Clemens and Lyons, W. Berry}, title = {Validation of sampling antarctic subglacial hypersaline waters with an electrothermal ice melting probe (IceMole) for environmental analytical geochemistry}, series = {International Journal of Environmental Analytical Chemistry}, volume = {101}, journal = {International Journal of Environmental Analytical Chemistry}, number = {15}, publisher = {Taylor \& Francis}, address = {London}, issn = {0306-7319}, doi = {10.1080/03067319.2019.1704750}, pages = {2654 -- 2667}, year = {2021}, abstract = {Geochemical characterisation of hypersaline waters is difficult as high concentrations of salts hinder the analysis of constituents at low concentrations, such as trace metals, and the collection of samples for trace metal analysis in natural waters can be easily contaminated. This is particularly the case if samples are collected by non-conventional techniques such as those required for aquatic subglacial environments. In this paper we present the first analysis of a subglacial brine from Taylor Valley, (~ 78°S), Antarctica for the trace metals: Ba, Co, Mo, Rb, Sr, V, and U. Samples were collected englacially using an electrothermal melting probe called the IceMole. This probe uses differential heating of a copper head as well as the probe's sidewalls and an ice screw at the melting head to move through glacier ice. Detailed blanks, meltwater, and subglacial brine samples were collected to evaluate the impact of the IceMole and the borehole pump, the melting and collection process, filtration, and storage on the geochemistry of the samples collected by this device. Comparisons between melt water profiles through the glacier ice and blank analysis, with published studies on ice geochemistry, suggest the potential for minor contributions of some species Rb, As, Co, Mn, Ni, NH4+, and NO2-+NO3- from the IceMole. The ability to conduct detailed chemical analyses of subglacial fluids collected with melting probes is critical for the future exploration of the hundreds of deep subglacial lakes in Antarctica.}, language = {en} } @inproceedings{GierseKraemerDaabetal.2013, author = {Gierse, Andreas and Kr{\"a}mer, Stefan and Daab, Dominique J. and Hessel, Joana and Baader, Fabian and M{\"u}ller, Brigitte S. and Wagner, Tobias and Gdalewitsch, Georg and Plescher, Engelbert and Pf{\"u}tzenreuter, Lysan}, title = {Experimental in-flight modal-analysis of a sounding rocket structure}, series = {21st ESA Symposium on Rocket and Ballon related Research}, booktitle = {21st ESA Symposium on Rocket and Ballon related Research}, isbn = {9789290922858}, pages = {341 -- 346}, year = {2013}, language = {en} } @incollection{GitterHornhardtKoewiusetal.2003, author = {Gitter, R. and Hornhardt, Ch. and Koewius, A. and Wahle, Michael and Landwein, Th. M. and Linn, W. and Meiners, F. and Wenk, L.}, title = {Konstruieren mit Aluminium [Kapitel 4]}, series = {Aluminium-Taschenbuch / Hrsg.: Aluminium-Zentrale D{\"u}sseldorf. - Bd. 3: Weiterverarbeitung und Anwendung}, booktitle = {Aluminium-Taschenbuch / Hrsg.: Aluminium-Zentrale D{\"u}sseldorf. - Bd. 3: Weiterverarbeitung und Anwendung}, edition = {16. Auflage}, publisher = {Aluminium-Verlag}, address = {D{\"u}sseldorf}, isbn = {3-87017-275-4}, pages = {355 -- 599}, year = {2003}, language = {de} } @inproceedings{GrundmannBauerBieleetal.2018, author = {Grundmann, Jan Thimo and Bauer, Waldemar and Biele, Jens and Boden, Ralf and Ceriotti, Matteo and Cordero, Federico and Dachwald, Bernd and Dumont, Etienne and Grimm, Christian D. and Herč{\´i}k, David and Ho, Tra-Mi and Jahnke, Rico and Koch, Aaron D and Koncz, Alexander and Krause, Christian and Lange, Caroline and Lichtenheldt, Roy and Maiwald, Volker and Mikschl, Tobias and Mikulz, Eugen and Montenegro, Sergio and Pelivan, Ivanka and Peloni, Alessandro and Quantius, Dominik and Reershemius, Siebo and Renger, Thomas and Riemann, Johannes 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 Tardivel, Simon and T{\´o}th, Norbert and Wejmo, Elisabet and Wolff, Friederike and Ziach, Christian}, title = {Small spacecraft based multiple near-earth asteroid rendezvous and landing with near-term solar sails and 'Now-Term 'technologies}, series = {69 th International Astronautical Congress (IAC)}, booktitle = {69 th International Astronautical Congress (IAC)}, pages = {1 -- 18}, year = {2018}, abstract = {Physical interaction with small solar system bodies (SSSB) is the next step in planetary science, planetary in-situ resource utilization (ISRU), and planetary defense (PD). It requires a broader understanding of the surface properties of the target objects, with particular interest focused on those near Earth. Knowledge of composition, multi-scale surface structure, thermal response, and interior structure is required to design, validate and operate missions addressing these three fields. The current level of understanding is occasionally simplified into the phrase, "If you've seen one asteroid, you've seen one asteroid", meaning that the in-situ characterization of SSSBs has yet to cross the threshold towards a robust and stable scheme of classification. This would enable generic features in spacecraft design, particularly for ISRU and science missions. Currently, it is necessary to characterize any potential target object sufficiently by a dedicated pre-cursor mission to design the mission which then interacts with the object in a complex fashion. To open up strategic approaches, much broader in-depth characterization of potential target objects would be highly desirable. In SSSB science missions, MASCOT-like nano-landers and instrument carriers which integrate at the instrument level to their mothership have met interest. By its size, MASCOT is compatible with small interplanetary missions. The DLR-ESTEC Gossamer Roadmap Science Working Groups' studies identified Multiple Near-Earth asteroid (NEA) Rendezvous (MNR) as one of the space science missions only feasible with solar sail propulsion. The Solar Polar Orbiter (SPO) study showed the ability to access any inclination, theDisplaced-L1 (DL1) mission operates close to Earth, where objects of interest to PD and for ISRU reside. Other studies outline the unique capability of solar sails to provide access to all SSSB, at least within the orbit of Jupiter, and significant progress has been made to explore the performance envelope of near-term solar sails for MNR. However, it is difficult for sailcraft to interact physically with a SSSB. We expand and extend the philosophy of the recently qualified DLR Gossamer solar sail deployment technology using efficient multiple sub-spacecraft integration to also include landers for one-way in-situ investigations and sample-return missions by synergetic integration and operation of sail and lander. The MASCOT design concept and its characteristic features have created an ideal counterpart for thisand has already been adapted to the needs of the AIM spacecraft, former part of the NASA-ESA AIDA missionDesigning the 69th International Astronautical Congress (IAC), Bremen, Germany, 1-5 October 2018. IAC-18-F1.2.3 Page 2 of 17 combined spacecraft for piggy-back launch accommodation enables low-cost massively parallel access to the NEA population.}, language = {en} } @inproceedings{GrundmannBauerBieleetal.2018, author = {Grundmann, Jan Thimo and Bauer, Waldemar and Biele, Jens and Boden, Ralf and Ceriotti, Matteo and Cordero, Federico and Dachwald, Bernd and Dumont, Etienne and Grimm, Christian and Herč{\´i}k, David and Herique, Alain and Ho, Tra-Mi and Jahnke, Rico and Koch, Aaron and Kofman, Wlodek and Koncz, Alexander and Krause, Christian and Lange, Caroline and Lichtenheldt, Roy and Maiwald, Volker and Mikschl, Tobias and Mikulz, Eugen and Montenegro, Sergio and Pelivan, Ivanka and Peloni, Alessandro and Plettemeier, Dirk and Quantius, Dominik and Reershemius, Siebo and Renger, Thomas and Riemann, Johannes 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 Tardivel, Simon and Toth, Norbert and Wejmo, Elisabet and Wolff, Friederike and Ziach, Christian}, title = {Efficient massively parallel prospection for ISRU by multiple near-earth asteroid rendezvous using near-term solar sails and'now-term'small spacecraft solutions}, series = {2nd Asteroid Science Intersections with In-Space Mine Engineering - ASIME 2018}, booktitle = {2nd Asteroid Science Intersections with In-Space Mine Engineering - ASIME 2018}, pages = {1 -- 33}, year = {2018}, abstract = {Physical interaction with small solar system bodies (SSSB) is key for in-situ resource utilization (ISRU). The design of mining missions requires good understanding of SSSB properties, including composition, surface and interior structure, and thermal environment. But as the saying goes "If you've seen one asteroid, you've seen one Asteroid": Although some patterns may begin to appear, a stable and reliable scheme of SSSB classification still has to be evolved. Identified commonalities would enable generic ISRU technology and spacecraft design approaches with a high degree of re-use. Strategic approaches require much broader in-depth characterization of the SSSB populations of interest to the ISRU community. The DLR-ESTEC GOSSAMER Roadmap Science Working Groups identified target-flexible Multiple Near-Earth asteroid (NEA) Rendezvous (MNR) as one of the missions only feasible with solar sail propulsion, showed the ability to access any inclination and a wide range of heliocentric distances as well as continuous operation close to Earth's orbit where low delta-v objects reside.}, language = {en} } @inproceedings{GrundmannBauerBieleetal.2015, author = {Grundmann, Jan Thimo and Bauer, Waldemar and Biele, Jens and Cordero, Frederico and Dachwald, Bernd and Koncz, Alexander and Krause, Christian and Mikschl, Tobias and Montenegro, Sergio and Quantius, Dominik and Ruffer, Michael and Sasaki, Kaname and Schmitz, Nicole and Seefeldt, Patric and T{\´o}th, Norbert and Wejmo, Elisabet}, title = {From Sail to Soil - Getting Sailcraft Out of the Harbour on a Visit to One of Earth's Nearest Neighbours}, series = {4th IAA Planetary Denfense Conference - PDC 2015, 13-17 April 2015, Frascati, Roma, Italy}, booktitle = {4th IAA Planetary Denfense Conference - PDC 2015, 13-17 April 2015, Frascati, Roma, Italy}, pages = {20 S.}, year = {2015}, language = {en} }