TY  - JOUR
A1  - Späte, Frank
A1  - Faber, Christian
A1  - Schwarzer, Klemens
A1  - Hartz, Thomas
T1  - Comparison of solar hot water systems in solar settlements - decentralized or centralized systems?
JF  - Proceedings / organised by: ISES Europe ... [Ed.: Deutsche Gesellschaft für Sonnenenergie e.V. - DGS, Munich ; PSE GmbH - Forschung Entwicklung Marketing, Freiburg]. - Vol. 1
Y1  - 2004
SN  - 3-9809656-1-9
N1  - EuroSun <5, 2004, Freiburg, Breisgau> ; Internationales Sonnenforum <14, 2004, Freiburg, Breisgau> ; Deutsche Gesellschaft für Sonnenenergie
SP  - 1-666-1-671
PB  - PSE
CY  - Freiburg [Breisgau]
ER  - 
TY  - CHAP
A1  - Spurmann, Jörn
A1  - Ohndorf, Andreas
A1  - Dachwald, Bernd
A1  - Seboldt, Wolfgang
A1  - Löb, Horst
A1  - Schartner, Karl-Heinz
T1  - Interplanetary trajectory optimization for a sep mission to Saturn
T2  - 60th International Astronautical Congress 2009
N2  - The recently proposed NASA and ESA missions to Saturn and Jupiter pose difficult tasks to mission designers because chemical propulsion scenarios are not capable of transferring heavy spacecraft into the outer solar system without the use of gravity assists. Thus our developed mission scenario based on the joint NASA/ESA Titan Saturn System Mission baselines solar electric propulsion to improve mission flexibility and transfer time. For the calculation of near-globally optimal low-thrust trajectories, we have used a method called Evolutionary Neurocontrol, which is implemented in the low-thrust trajectory optimization software InTrance. The studied solar electric propulsion scenario covers trajectory optimization of the interplanetary transfer including variations of the spacecraft's thrust level, the thrust unit's specific impulse and the solar power generator power level. Additionally developed software extensions enabled trajectory optimization with launcher-provided hyperbolic excess energy, a complex solar power generator model and a variable specific impulse ion engine model. For the investigated mission scenario, Evolutionary Neurocontrol yields good optimization results, which also hold valid for the more elaborate spacecraft models. Compared to Cassini/Huygens, the best found solutions have faster transfer times and a higher mission flexibility in general.
KW  - Spacecraft
KW  - Reusable Rocket Engines
KW  - Hybrid Propellants
Y1  - 2009
SN  - 9781615679089
N1  - 60th International Astronautical Congress 2009 (IAC 2009)
Held 12-16 October 2009, Daejeon, Republic of Korea.
SP  - 5234
EP  - 5248
ER  - 
TY  - PAT
A1  - Sponagel, Stefan
A1  - Wachowitz, Waldemar
T1  - Shaft seal : United States Patent 5,143,385 ; date of patent: Sep. 1, 1992 / assignee: Firma Carl Freudenberg
Y1  - 1992
N1  - Barcode: US005143385A ; Volltext über Datenbank: http://www.google.com/patents
PB  - [United States Patent and Trademark Office]
CY  - [Alexandria, VA]
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Kilthau, G.
A1  - Spies, K. H.
T1  - Sealing mechanism of lip seals
JF  - Eleventh 11th International Conference on Fluid Sealing : proceedings of the 11th Internat. Conference on Fluid Sealing, held at Cannes, France 8 - 10 April, 1987 / organised and sponsored by BHRA, the Fluid Engineering Centre. Ed. B. S. Nau
Y1  - 1987
SN  - 3-540-51383-3
N1  - International Conference on Fluid Sealing <11, 1987, Cannes>
SP  - 748
EP  - 772
PB  - Elsevier
CY  - London
ER  - 
TY  - PAT
A1  - Sponagel, Stefan
A1  - Graf, Günter
A1  - Groß, Heinz
T1  - Method for manufacturing a sealing ring : United States Patent 4,861,536 ; date of patent: Aug. 12, 1989 / assignee: Firma Carl Freudenberg. Inventors: Gunter Graf ; Heinz Gross ; Stefan Sponagel
Y1  - 1989
N1  - Barcode: US004861536A ; Volltext über Datenbank: http://www.google.com/patents
PB  - [United States Patent and Trademark Office]
CY  - [Alexandria, VA]
ER  - 
TY  - PAT
A1  - Sponagel, Stefan
A1  - Graf, Günter
A1  - Groß, Heinz
T1  - Method for the manufacture of a sealing ring with a sealing lip having hydrodynamically acting return elements : United States Patent 4,850,097 ; date of patent: Jul. 25, 1989 / assignee: Firma Carl Freudenberg. Inventors: Gunter Graf ; Heinz Gross ; Stefan Sponagel
Y1  - 1989
N1  - Barcode: US004850097A ; Volltext über Datenbank: http://www.google.com/patents
PB  - [United States Patent and Trademark Office]
CY  - [Alexandria, VA]
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Baroud, G.
A1  - Steffen, T.
A1  - Wu, J.
T1  - Parameter identification for cement infiltration of osteoporotic bone
JF  - Poromechanics II : Proceedings of the Second Biot Conference on Poromechanics Grenoble, France 26 - 28 August 2002 / ed. by J.-L. Auriault ...
Y1  - 2002
SN  - 90-5809-394-8
SP  - 55
EP  - 58
PB  - Balkema
CY  - Lisse [u.a.]
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Baroud, G.
A1  - Falk, R.
A1  - Crookshank, M.
T1  - Experimental and theoretical investigation of directional permeability of human vertebral cancellous bone for cement infiltration. G. Baroud, R. Falk, M. Crookshank, S. Sponagel, T. Steffen
JF  - Journal of Biomechanics. 37 (2004), H. 2
Y1  - 2004
SN  - 0021-9290
SP  - 189
EP  - 196
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Baroud, G.
A1  - Falk, R.
A1  - Crookshank, M.
T1  - Corrigendum to “Experimental and theoretical investigation of directional permeability of human vertebral cancellous bone for cement infiltration”. Baroud, G.; Falk, R.; Crookshank, M.; Sponagel, S.; Steffen, T.
JF  - Journal of Biomechanics. 37 (2004), H. 2
Y1  - 2004
SN  - 0021-9290
SP  - 1802
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Akbay, U.
A1  - Becker, E.
A1  - Krozer, S.
T1  - Instability of slow viscometric flow
JF  - Mechanics Research Communications. 7 (1980), H. 4
Y1  - 1980
SN  - 0093-6413
SP  - 199
EP  - 204
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Akbay, U.
A1  - Becker, E.
T1  - Instability of plane Couette flow of viscoelastic liquids
JF  - Journal of non-Newtonian fluid mechanics. 18 (1985), H. 2
Y1  - 1985
SN  - 0377-0257
SP  - 123
EP  - 141
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Adbay, U.
A1  - Becker, E.
A1  - Krozer, S.
T1  - A possible cause of viscoelastic turbulence
JF  - Rheology : proceedings of the 8th International Congress of Rheology, held in Naples, Italy, September 1 - 5, 1980 / Hrsg. von Giovanni Astarita, Vol. 2
Y1  - 1980
SN  - 0-306-40465-6
SP  - 79
EP  - 84
PB  - Plenum Pr.
CY  - New York
ER  - 
TY  - CHAP
A1  - Spohr, A.
A1  - Schirra, Julian
A1  - Hoefling, J.
A1  - Schedl, A.
T1  - Wing weight estimation methodology for highly non-planar lifting systems during conceptual design
T2  - Deutscher Luft- und Raumfahrtkongress 2013 : 10.9. - 12.9.2013, Stuttgart
Y1  - 2013
SP  - Publ. online
ER  - 
TY  - JOUR
A1  - Spietz, Peter
A1  - Spröwitz, Tom
A1  - Seefeldt, Patric
A1  - Grundmann, Jan Thimo
A1  - Jahnke, Rico
A1  - Mikschl, Tobias
A1  - Mikulz, Eugen
A1  - Montenegro, Sergio
A1  - Reershemius, Siebo
A1  - Renger, Thomas
A1  - Ruffer, Michael
A1  - Sasaki, Kaname
A1  - Sznajder, Maciej
A1  - Tóth, Norbert
A1  - Ceriotti, Matteo
A1  - Dachwald, Bernd
A1  - Macdonald, Malcolm
A1  - McInnes, Colin
A1  - Seboldt, Wolfgang
A1  - Quantius, Dominik
A1  - Bauer, Waldemar
A1  - Wiedemann, Carsten
A1  - Grimm, Christian D.
A1  - Hercik, David
A1  - Ho, Tra-Mi
A1  - Lange, Caroline
A1  - Schmitz, Nicole
T1  - Paths not taken – The Gossamer roadmap’s other options
JF  - Advances in Space Research
KW  - Solar sail
KW  - Small spacecraft
KW  - DLR-ESTEC GOSSAMER roadmap for solar sailing
KW  - GOSSAMER-1
Y1  - 2021
U6  - https://doi.org/10.1016/j.asr.2021.01.044
SN  - 0273-1177
VL  - 67
IS  - 9
SP  - 2912
EP  - 2956
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Spiess, Elmar
A1  - Wilfried, Reichardt
A1  - Alvarez, Gerardo
A1  - Gottrup, Marcus
A1  - Öhlschläger, Peter
T1  - An Artificial PAP Gene Breaks Self-tolerance and Promotes Tumor Regression in the TRAMP Model for Prostate Carcinoma
JF  - Molecular Therapy
Y1  - 2011
SN  - 1525-0016
VL  - 20
IS  - 3
SP  - 555
EP  - 564
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Spelthahn, Heiko
A1  - Schubert, Jürgen
A1  - Schöning, Michael Josef
T1  - Dünnschichtsensoren für die Schwermetallanalytik
JF  - GIT : Labor-Fachzeitschrift
N2  - Die Detektion von Schadstoffen repräsentiert in der Umweltanalytik eine wichtige Aufgabenstellung. Gerade die Abwasser- bzw. Brauchwasseranalytik sowie die Prozesskontrolle haben einen hohen Stellenwert. Siliziumbasierte Dünnschichtsensoren bieten eine kostengünstige Möglichkeit, „online“-Messungen bzw. Vor-Ort-Messungen zeitnah durchzuführen. In dieser Arbeit wird ein potentiometrisches Sensorarray auf der Basis von Chalkogenidgläsern zur Detektion von Schwermetallen in wässrigen Medien vorgestellt.
Y1  - 2012
SN  - 0016-3538
VL  - 56
IS  - 4
SP  - 285
EP  - 287
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Spelthahn, Heiko
A1  - Schaffrath, Sophie
A1  - Coppe, Thomas
A1  - Rufi, Frederic
A1  - Schöning, Michael Josef
T1  - Development of an electrolyte-insulator-semiconductor (EIS) based capacitive heavy metal sensor for the detection of Pb2+ und Cd2+ ions
JF  - Physica status solidi (a) : applications and material science. 207 (2010), H. 4
Y1  - 2010
SN  - 1862-6300
N1  - Special Issue: Engineering of Functional Interfaces EnFI 2009
SP  - 930
EP  - 934
ER  - 
TY  - JOUR
A1  - Spelthahn, Heiko
A1  - Poghossian, Arshak
A1  - Schöning, Michael Josef
T1  - Self-aligned nanogaps and nanochannels via conventional photolithography and pattern-size reduction technique
JF  - Electrochimica Acta. 54 (2009), H. 25 Sp. Iss. SI
Y1  - 2009
SN  - 0013-4686
SP  - 6010
EP  - 6014
ER  - 
TY  - JOUR
A1  - Spelthahn, Heiko
A1  - Kirsanov, Dmitry
A1  - Legin, Andrey
A1  - Osterrath, Thomas
A1  - Schubert, Jürgen
A1  - Zander, Willi
A1  - Schöning, Michael Josef
T1  - Development of a thin-film sensor array for analytical monitoring of heavy metals in aqueous solutions
JF  - Physica Status Solidi (a)
N2  - In industrial processes there is a variety of heavy metals (e.g., copper, zinc, cadmium, and lead) in use for wires, coatings, paints, alloys, batteries, etc. Since the application of these transition metals for industry is inevitable, it is a vital task to develop proper analytical techniques for their monitoring at low activity levels, especially because most of these elements are acutely toxic for biological organisms. The determination of ions in solution by means of a simple and inexpensive sensor array is, therefore, a promising task. In this work, a sensor array with heavy metal-sensitive chalcogenide glass membranes for the simultaneous detection of the four ions Ag⁺, Cu2⁺, Cd2⁺, and Pb2⁺ in solution is realized. The results of the physical characterization by means of microscopy, profilometry, Rutherford backscattering spectroscopy (RBS), and scanning electron microscopy (SEM) as well as the electrochemical characterization by means of potentiometric measurements are presented. Additionally, the possibility to expand the sensor array by polymeric sensor membranes is discussed.
Y1  - 2012
SN  - 1862-6319
U6  - https://doi.org/10.1002/pssa.201100733
VL  - 209
IS  - 5
SP  - 885
EP  - 891
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - CHAP
A1  - Spasov, Yulian
A1  - Döring, Bernd
A1  - Griffin, Allan
T1  - Exploiting the thermal mass in an energy efficient building - a comparison exercise between IES Apache and TRNSYS models
T2  - Clima 2007 WellBeing Indoors: 9th Rehva World Congress, 10-14 June 2007, Helsinki, Finland : proceedings
Y1  - 2007
SN  - 978-952-99898-2-9
SP  - 1
EP  - 7
CY  - Helsinki
ER  -