TY  - JOUR
A1  - Sommer, F.
A1  - Gerling, Ulrich
A1  - Predel, Bruno
T1  - Comments on 'On the evaluation of interchange energies and the equilibrium constant from mixing enthalpies of a regular associated solution' by S. Lele, G.V.S. Sastry, and P. Ramachandrarao = Kommentar zu 'Zur Berechnung der Wechselwirkungsenergien und der Gleichgewichtskonstanten aus Mischungsenthalpien in regulären assoziierten Lösungen' von S. Lele, G.V.S. Sastry und P. Ramachandrarao
JF  - Zeitschrift für Metallkunde : international journal of materials research and advanced techniques. Bd. 75, H. 6
Y1  - 1984
SN  - 0044-3093 ; 0179-4841
SP  - 449
EP  - 454
ER  - 
TY  - JOUR
A1  - Sommer, Ferdinand
A1  - Gerling, Ulrich
A1  - Predel, Bruno
T1  - On the evaluation of interchange energies and the equilibrium-constant from mixing enthalpies of a regular associated solution-comment
JF  - Zeitschrift für Metallkunde : international journal of materials research and advanced techniques. Bd. 75, H. 11
Y1  - 1984
SN  - 0044-3093 ; 0179-4841
SP  - 898
ER  - 
TY  - THES
A1  - Sonntag, Jana
T1  - Konzeption und Entwicklung einer Corporate Identity und einer Tourismuskampagne für das Siegerland
N2  - Im Rahmen meiner Bachelorarbeit werden ich mich mit der Konzeption und Entwicklung einer Corporate Identity für das Siegerland beschäftigen. Weiterhin möchte ich eine Tourismuskampagne für diese Region gestalten.
KW  - Corporate Identity
KW  - Tourismuskampagne
Y1  - 2021
N1  - Für diese Arbeit steht kein Volltext zur Verfügung.
PB  - FH Aachen
CY  - Aachen
ER  - 
TY  - THES
A1  - Sorgalla, Jonas
T1  - Skidio  - die digitale Transformation der Kosmetikindustrie : die Entwicklung eines digitalen Vertriebskanals
N2  - Skidio basiert dabei auf dem Konzept, dass das Video für die Kosmetikindustrie das optimale Medium für Produktvorstellungen ist. Der Ausgangspunkt für das Einkaufserlebnis des Nutzers ist daher ein Video-Feed, bestehend aus Kurz- und Live-Videos, die einen direkten Kauf der gezeigten Produkte ermöglichen. So entsteht ein Ort, an dem Nutzer auf eine unterhaltsame Art und Weise Inspiration für die eigene Hautpflege finden können. Dabei ist das Video als Medium nicht nur unterhaltsamer, sondern zugleich auch deutlich informativer als klassische Produktlistings. Die Produktpräsentation wird interaktiver, erlebbarer und deutlich effektiver. Gemeinsam mit Technologien wie einer digitalen Hautanalyse, wird so das Potenzial des E-Commerce für die Beautyindustrie vollständig entfaltet.
KW  - Kosmetik
KW  - Einkaufen
KW  - Ecommerce
KW  - Digitatlisierung
KW  - App
Y1  - 2021
N1  - Für diese Arbeit steht kein Volltext zur Verfügung.
PB  - FH Aachen
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Sousa, Marcos A. M.
A1  - Siqueira, Jose R. Jr.
A1  - Vercik, Andres
A1  - Schöning, Michael Josef
A1  - Oliveira, Osvaldo N. Jr.
T1  - Determining the optimized layer-by-layer film architecture with dendrimer/carbon nanotubes for field-effect sensors
JF  - IEEE Sensors Journal
N2  - The capacitive electrolyte–insulator–semiconductor (EIS) structure is a typical device based on a field-effect sensor platform. With a simple silicon-based structure, EIS have been useful for several sensing applications, especially with incorporation of nanostructured films to modulate the ionic transport and the flat-band potential. In this paper, we report on ion transport and changes in flat-band potential in EIS sensors made with layer-by-layer films containing poly(amidoamine) (PAMAM) dendrimer and single-walled carbon nanotubes (SWNTs) adsorbed on p-Si/SiO 2 /Ta 2 O 5 chips with an Al ohmic contact. The impedance spectra were fitted using an equivalent circuit model, from which we could determine parameters such as the double-layer capacitance. This capacitance decreased with the number of bilayers owing to space charge accumulated at the electrolyte–insulator interface, up to three PAMAM/SWNTs bilayers, after which it stabilized. The charge-transfer resistance was also minimum for three bilayers, thus indicating that this is the ideal architecture for an optimized EIS performance. The understanding of the influence of nanostructures and the fine control of operation parameters pave the way for optimizing the design and performance of new EIS sensors.
Y1  - 2017
U6  - https://doi.org/10.1109/JSEN.2017.2653238
SN  - 1558-1748
VL  - 17
IS  - 6
SP  - 1735
EP  - 1740
PB  - IEEE
CY  - New York
ER  - 
TY  - CHAP
A1  - Spannhake, Jan
A1  - Schulz, Olaf
A1  - Helwig, Andreas
A1  - Krenkow, Angelika
A1  - Müller, Gerhard
A1  - Doll, Theodor
T1  - High-temperature MEMS heater platforms: long-term performance of metal and semiconductor heater materials
N2  - Micromachined thermal heater platforms offer low electrical power consumption and high modulation speed, i.e. properties which are advantageous for realizing nondispersive infrared (NDIR) gas- and liquid monitoring systems. In this paper, we report on investigations on silicon-on-insulator (SOI) based infrared (IR) emitter devices heated by employing different kinds of metallic and semiconductor heater materials. Our results clearly reveal the superior high-temperature performance of semiconductor over metallic heater materials. Long-term stable emitter operation in the vicinity of 1300 K could be attained using heavily antimony-doped tin dioxide (SnO2:Sb) heater elements.
KW  - Biosensor
KW  - Hotplate
KW  - heater metallisation
KW  - high-temperature stability
KW  - electro-migration
KW  - doped silicon
KW  - doped metal oxide
KW  - antimony doped tin oxide
Y1  - 2006
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1513
ER  - 
TY  - BOOK
A1  - Sparla, Peter
T1  - Experimentelle Untersuchungen zur Ermittlung des Brechungsindex der Atmosphäre mit Hilfe von elektronischen Sensoren
Y1  - 1993
N1  - Veröffentlichung des Geodätischen Instituts der Rheinisch-Westfälischen Technischen Hochschule Aachen ; 50  ; Zugl.: Aachen, Techn. Hochsch., Diss., 1993
PB  - Geodätisches Inst. der Rheinisch-Westfälischen Techn. Hochsch.
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Sparla, Peter
T1  - Zur Definition der Ziellinie, Zielachse und des anallaktischen Punktes bei geodätischen Messfernrohren
JF  - Festschrift zur Vollendung des 65. Lebensjahres und zur Emeritierung von Prof. E. Hektor
Y1  - 1986
N1  - Veröffentlichung des Geodätischen Instituts der Rheinisch-Westfälischen Technischen Hochschule Aachen ; 40
SP  - 16.1
EP  - 16.20
PB  - Geodätisches Inst. der Rheinisch-Westfälischen Techn. Hochsch.
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Sparla, Peter
T1  - Der Laserimpuls-Distanzmesser Distomat Wild DI3000 - Messprinzip und Genauigkeitsuntersuchung
JF  - Allgemeine Vermessungs-Nachrichten : AVN ; Zeitschrift für alle Bereiche des Vermessungswesens. 94 (1987), H. 4
Y1  - 1987
SN  - 0002-5968
SP  - 133
EP  - 146
ER  - 
TY  - JOUR
A1  - Sparla, Peter
T1  - Zur GPS-gestützten Talsperrenüberwachung
JF  - 125 Jahre Geodäsie an der RWTH Aachen
Y1  - 1995
N1  - Veröffentlichung des Geodätischen Instituts der Rheinisch-Westfälischen Technischen Hochschule Aachen ; 53
SP  - 47
EP  - 58
PB  - Geodätisches Inst. der Rheinisch-Westfälischen Techn. Hochsch.
CY  - Aachen
ER  - 
TY  - CHAP
A1  - Sparla, Peter
T1  - Vermessung
T2  - Übungsaufgaben und Berechnungen für den Baubetrieb
Y1  - 2019
SN  - 978-3-658-23127-9
U6  - https://doi.org/10.1007/978-3-658-23127-9_2
SP  - 13
EP  - 61
PB  - Springer Vieweg
CY  - Wiesbaden
ER  - 
TY  - JOUR
A1  - Sparla, Peter
A1  - Benning, W.
T1  - Berührungslose Vermessung vertikaler Schächte in Deponien
JF  - Deponieentwässerungssysteme II : Bau, Betrieb, Schäden und Sanierungsverfahren ;  mit 40 Tab.,  / Gerd Burkhardt  Hrsg.: Wilfried J. Bartz.
Y1  - 1996
SN  - 3-8169-1386-5
N1  - Kontakt und Studium ; 501
SP  - 127
EP  - 144
PB  - Expert-Verl.
CY  - Renningen-Malmsheim
ER  - 
TY  - JOUR
A1  - Sparla, Peter
A1  - Benning, W.
A1  - Sieprath, A.
T1  - Berührungslose 3D-Vermessung von Sickerwasserschächten im Deponiebereich
JF  - Vermessungswesen und Raumordnung : VR. 57 (1995), H. 7-8
Y1  - 1995
SN  - 0340-5141
SP  - 397
EP  - 407
ER  - 
TY  - JOUR
A1  - Sparla, Peter
A1  - Kampmann, G.
A1  - Witte, B.
T1  - Möglichkeiten und Probleme der reflektorlosen Distanzmessung gezeigt am Beispiel des Wild DIOR 3002
JF  - Ingenieurvermessung 88 : Beiträge zum 10. Internationalen Kurs für Ingenieurvermessung, München, 12. - 17. 9. 1988 / Veranst.: Heinrich Ebner
Y1  - 1988
N1  - Internationaler Kurs für Ingenieurvermessung <10, 1988, München>
PB  - Dümmler
CY  - Bonn
ER  - 
TY  - JOUR
A1  - Sparla, Peter
A1  - Kampmann, G.
A1  - Wüller, Herbert
T1  - Auswertung von EDM-Kalibrierungen mit unterstützendem robustem Schätzer
JF  - BDVI-Forum : Zeitschr. d. Bundes der Öffentlich Bestellten Vermessungsingenieure e.V  (1986)
Y1  - 1986
SP  - 336
EP  - 341
ER  - 
TY  - JOUR
A1  - Sparla, Peter
A1  - Schmidt, Hubert
T1  - Anmerkungen zu "Ein verallgemeinertes Feldverfahren zur Überprüfung von Nivelliergeräten." AVN 3 /2004, S. 82 / Schmidt, Hubert ; Sparla, Peter
JF  - Allgemeine Vermessungs-Nachrichten : AVN ; Zeitschrift für alle Bereiche des Vermessungswesens. 111 (2004), H. 11-12
Y1  - 2004
SN  - 0002-5968
SP  - 405
EP  - 408
ER  - 
TY  - JOUR
A1  - Sparla, Peter
A1  - Wüller, Herbert
T1  - QL 300 D, ein Nivelliersystem mit Halbleiterlaserdiode
JF  - Der Vermessungsingenieur. 36 (1985), H. 1
Y1  - 1985
SN  - 0042-4099
SP  - 2
EP  - 4
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  - 
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  - 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  - 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  - 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  - Schubert, Jürgen
A1  - Schöning, Michael Josef
T1  - Dünnschichtsensoren für die Schwermetallanalytik : Mikroelektroden auf Chalkogenidglasbasis
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
IS  - 4
SP  - 285
EP  - 287
PB  - Wiley-VCH
CY  - Weinheim
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  - 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  - 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  - THES
A1  - Spomer, Ruth
T1  - Zoologisches Forschungsmuseum Alexander König : Entwicklung eines neuen Erscheinungsbildes
N2  - Artenvielfalt erforschen und erklären – So lautet der Leitsatz des Bonner Forschungsmuseums. Durch inszenierte Lebensräume sowie beeindruckende sammlungsbasierte Ausstellungen werden komplexe biologische Phänomene erklärt und die Biodiversitätsforschung für ein breites Publikum zugänglich gemacht. Dabei wird das übergeordnete Ziel verfolgt, das Interesse der Allgemeinheit an zoologischer Wissenschaft zu wecken.
Das neue Erscheinungsbild schafft Wiedererkennbarkeit und positioniert das Museum als wissenschaftliche Institution. Dabei stellt die Verknüpfung des Forschungsaspektes und der Artenvielfalt die Basis der Gestaltung dar und kommuniziert die wesentlichen Inhalte. Zudem sorgt ein medienübergreifendes Ordnungssystem für eine bessere Übersicht und erleichtert den Zugang zu komplexen Inhalten. So erhält das Museum eine spannendere, attraktivere Wirkung nach Außen und eine bessere Orientierung im Inneren.
KW  - Museum
KW  - Corporate Design
KW  - Artenvielfalt
KW  - Biodiversität
KW  - Wissenschaft
Y1  - 2021
PB  - FH Aachen
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
T1  - Analytische Berechnung von Gummi- Metall- Verbindungen
JF  - Konstruktion : Zeitschrift für Produktentwicklung. 39 (1987), H. 4
Y1  - 1987
SN  - 0373-3300
SP  - 151
EP  - 158
ER  - 
TY  - BOOK
A1  - Sponagel, Stefan
T1  - Über die Stabilität einer einfachen viskometrischen Bewegung
Y1  - 1982
N1  - Techn. Hochsch. Darmstadt, Dissertation
CY  - Darmstadt
ER  - 
TY  - BOOK
A1  - Sponagel, Stefan
T1  - Gummi-Metall-Bauteile
Y1  - 1987
N1  - Universität Kaiserslautern, Dissertation
CY  - Kaiserslautern
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
T1  - Der Mensch als Läufer
JF  - Orthopädie und Sport : [Bericht zum Stolberger Orthopädietag, 13. Juni 1998]
Y1  - 1999
SN  - 978-3-89124-540-8
N1  - Inhaltsverzeichnis unter http://www.m-m-sports.com/mm_objects/previews/978-3-89124-540-8p.pdf
SP  - 15
EP  - 21
PB  - Meyer & Meyer
CY  - Aachen
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  - JOUR
A1  - Sponagel, Stefan
A1  - Akbay, S.
T1  - Über die Stabilität viskometrischer Strömungen
JF  - Rheologica acta. 20 (1981), H. 6
Y1  - 1981
SN  - 0035-4511
SP  - 579
EP  - 590
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Akbay, U.
T1  - Über den Mechanismus der Oberflächeninstabilität viskosimetrischer Strömungen
JF  - Rheologica Acta. 23 (1984), H. 2
Y1  - 1984
SN  - 0035-4511
SP  - 185
EP  - 188
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Akbay, U.
T1  - Über den Relaxationseinfluß auf die Stabilität der ebenen Couette-Strömung. Akbay, U. ; Sponagel, S.
JF  - Rheologica Acta. 23 (1984), H. 2
Y1  - 1984
SN  - 0035-4511
SP  - 177
EP  - 184
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  - 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  - 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  - 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  - Becker, E.
T1  - Reibungsfreie, ebene Diffusorströmung mit beliebigem Einlaufprofil. E. Becker, S. Sponagel
JF  - Zeitschrift für angewandte Mathematik und Mechanik: ZAMM. 64 (1984)
Y1  - 1984
SN  - 0044-2267
N1  - weitere ISSN: 0946-8463
SP  - T174
EP  - T177
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  - PAT
A1  - Sponagel, Stefan
A1  - Graf, Günter
A1  - Groß, Heinz
T1  - Verfahren zur Herstellung eines Dichtringes : Patentschrift DE3621242C1 ; Veröffentlichungstag der Patenterteilung : 25.06.1987 / Anmelder: Fa. Carl Freudenberg. Erfinder: Günter Graf ; Heinz Groß ; Stefan Sponagel
Y1  - 1987
N1  - Volltext über Datenbank: http://register.dpma.de/DPMAregister/pat/einsteiger
PB  - Deutsches Patent- und Markenamt
CY  - München
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Groling, G.
T1  - Eine Bemerkung zum Beweis des &#960; Theorems. G. Groling, S. Sponagel
JF  - Zeitschrift für angewandte Mathematik und Mechanik: ZAMM. 63 (1983)
Y1  - 1983
SN  - 0044-2267
N1  - weitere ISSN: 0946-8463
SP  - T258
EP  - T259
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  - JOUR
A1  - Sponagel, Stefan
A1  - Lutz, T.
T1  - Aggregatelager
JF  - Kautschuk Gummi Kunststoffe. 43 (1990), H. 5
Y1  - 1990
SN  - 0022-9520
SP  - 397
EP  - 406
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Lutz, Th.
T1  - Ein Beitrag zur Bestimmung der Haertewerte von Elastomeren
JF  - Kautschuk Gummi Kunststoffe. 43 (1990), H. 10
Y1  - 1990
SN  - 0022-9520
SP  - 861
EP  - 865
ER  - 
TY  - PAT
A1  - Sponagel, Stefan
A1  - Masberg, Mariane
A1  - Hartmann, Jochen
T1  - Kraftfahrzeugkühlwasserpumpe : Offenlegungsschrift DE19803739A1 ; Veröffentlichungstag im Patentblatt: 12.08.1999
Y1  - 1999
PB  - Deutsches Patent- und Markenamt
CY  - München
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Müller, H.
T1  - Exakte instationäre Lösungen der Navier-Stokes-Gleichung. H. Müller, S. Sponagel
JF  - Zeitschrift für angewandte Mathematik und Mechanik: ZAMM. 63 (1983)
Y1  - 1983
SN  - 0044-2267
N1  - weitere ISSN: 0946-8463
SP  - T273
EP  - T275
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Spaltofski, R.
T1  - Hochmolekulare Zusätze verbessern die Leichtlaufeigenschaft und die Tragfähigkeit von Schmierfilmen / Sponagel, S.  ; Spaltofski, R.
JF  - Mineralöltechnik. 32 (1987), H. 3
Y1  - 1987
SN  - 0341-1893
SP  - 28 S.
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Spaltofski, R.
A1  - Steinhilper, W.
T1  - Hochmolekulare Additive für die Gleitlagerschmierung. Spaltofski, R.; Sponagel, S.; Steinhilper, W.
JF  - Tribologie und Schmierungstechnik. 35 (1988), H. 5
Y1  - 1988
SN  - 0036-6218
SP  - 236
EP  - 241
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Unger, J.
T1  - Organisation und Strukturierung technischer Messungen
JF  - Werkstattstechnik. 88 (1998), H. 5
Y1  - 1998
SN  - 1436-5006
SP  - 223
EP  - 226
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Unger, J.
A1  - Spies, K. H.
T1  - Härtebegriff im Zusammenhang mit Vernetzung, Bruchdehnung und Dauerfestigkeit eines Elastomers
JF  - Kautschuk Gummi Kunststoffe. 56 (2003), H. 11
Y1  - 2003
SN  - 0948-3276
SP  - 608
EP  - 613
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  - PAT
A1  - Sponagel, Stefan
A1  - Wachowitz, Waldemar
T1  - Wellendichtung : Offenlegungsschrift DE3830706A1 ; Veröffentlichungstag im Patentblatt: 22.03.1990 / Anmelder: Fa. Carl Freudenberg
Y1  - 1990
PB  - Deutsches Patent- und Markenamt
CY  - München
ER  - 
TY  - BOOK
A1  - Sponagel, Stefan
A1  - Wachowitz, Waldemar
T1  - Wellendichtung : Europäische Patentschrift DE3621242C1 ; Veröffentlichungstag der Patentschrift : 06.06.1993 / Anmelder: Fa. Carl Freudenberg
Y1  - 1993
N1  - Volltext über Datenbank: http://publikationen.dpma.de/
PB  - Europäisches Patentamt
CY  - [München u.a.]
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  - 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  - Späte, Frank
A1  - Hafner, B.
A1  - Schwarzer, Klemens
T1  - A system for solar process heat for decentralized applications in developing countries
T2  - ISES 1999 Solar World Congress, Jerusalem, Israel, July 4-9, 1999 : conference proceedings / ed. Gershon Grossman. Vol. 3
Y1  - 2000
SN  - 0-080-043895-4
SP  - 236
EP  - 291
PB  - Elsevier
CY  - Oxford
ER  - 
TY  - CHAP
A1  - Späte, Frank
A1  - Hubrich, Jörg
A1  - Keip, Wolfgang
A1  - Meliß, Michael
T1  - Der Solar-Campus Jülich - Stand der Arbeiten
T2  - Deutschlands Weg in eine solare Zukunft : Tagungsband; 26. - 30. Juni 1998 Fachhochschule Köln / 11. Internationales Sonnenforum
Y1  - 1998
SP  - 666
EP  - 672
PB  - Solar Promotion
CY  - München
ER  - 
TY  - CHAP
A1  - Späte, Frank
A1  - Wollscheid, Georg
A1  - Meliß, Michael
T1  - Erdreichwärmetauscher im Solar-Campus Jülich
T2  - Deutschlands Weg in eine solare Zukunft : Tagungsband; 26. - 30. Juni 1998 Fachhochschule Köln / 11. Internationales Sonnenforum
Y1  - 1998
SP  - 591
EP  - 598
PB  - Solar Promotion
CY  - München
ER  - 
TY  - JOUR
A1  - Srivastava, A.
A1  - Chahar, V.
A1  - Sharma, V.
A1  - Sun, Y.
A1  - Bol, R.
A1  - Knolle, F.
A1  - Schnug, E.
A1  - Hoyler, Friedrich
A1  - Naskar, N.
A1  - Lahiri, S.
A1  - Patnaik, R.
T1  - Study of uranium toxicity using low-background gamma-ray spectrometry
JF  - Journal of Radioanalytical and Nuclear Chemistry
Y1  - 2017
U6  - https://doi.org/10.1007/s10967-017-5466-9
SN  - 1588-2780
IS  - Online first
SP  - 1
EP  - 7
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Srivastava, A.
A1  - Lahiri, S.
A1  - Maiti, M.
A1  - Knolle, F.
A1  - Hoyler, Friedrich
A1  - Scherer, Ulrich W.
A1  - Schnug, E. W.
T1  - Study of naturally occurring radioactive material (NORM) in top soil of Punjab State from the North Western part of India
JF  - Journal of Radioanalytical and Nuclear Chemistry
Y1  - 2014
U6  - https://doi.org/0.1007/s10967-014-3450-1
SN  - 1588-2780 (E-Journal); 0022-4081 (Print); 0134-0719 (Print); 0236-5731 (Print); 1417-2097 (Print)
VL  - 2014
IS  - 302
SP  - 1049
EP  - 1052
PB  - Springer Nature
CY  - Basel
ER  - 
TY  - JOUR
A1  - Srivastava, A.
A1  - Singh, V.
A1  - Aggarwal, P.
A1  - Schneeweiss, F.
A1  - Scherer, Ulrich W.
A1  - Friedrich, W.
T1  - Optical studies of insulating polymers for radiation dose monitoring
JF  - Indian Journal of Pure & Applied Physics
Y1  - 2010
SN  - 0019-5596
N1  - Special Issue: SI
VL  - 48
IS  - 11
SP  - 782
EP  - 786
ER  - 
TY  - CHAP
A1  - Srivastava, Alok
A1  - Knolle, F.
A1  - Schnug, E.
A1  - Scherer, Ulrich W.
T1  - Study of Trace Elements in Water Bodies of the Harz Mts. Region, Germany using Total Reflection X Ray Fluorescence (TXRF)
T2  - DAE-BRNS 12th National Symposium on Nuclear and Radiochemistry NUCAR 2015, Feb. 9-13, Mumbai, India, Mumbai, India; 02/2015
Y1  - 2015
SP  - 355
EP  - 356
ER  - 
TY  - CHAP
A1  - Srivastava, Alok
A1  - Knolle, Friedhart
A1  - Hoyler, Friedrich
A1  - Scherer, Ulrich W.
A1  - Schnug, Ewald
T1  - Uranium Toxicity in the State of Punjab in North-Western India
T2  - Management of Natural Resources in a Changing Environment
N2  - Lately there has been an increasing concern about uranium toxicity in some districts of Punjab State located in the North Western part of India after the publication of a report (Blaurock-Busch et al. 2010) which showed that the concentration of uranium in hair and urine of children suffering from physical deformities, neurological and mental disorder from Malwa region (Fig. 1) of Punjab State was manifold higher than the reference ranges. A train which connects the affected region with the nearby city of Bikaner which has a Cancer Hospital has been nicknamed as Cancer Express due to the frenzy generated on account of uranium related toxicity.
Y1  - 2015
SN  - 978-3-319-12559-6
U6  - https://doi.org/10.1007/978-3-319-12559-6_21
SP  - 271
EP  - 275
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Srivastava, Alok
A1  - Singh, Virendra
A1  - Dhand, Chetna
A1  - Kaur, Manindar
A1  - Singh, Tejvir
A1  - Witte, Katrin
A1  - Scherer, Ulrich W.
T1  - Study of swift heavy ion modified conduction polymer composites for application as gas sensor
N2  - A polyaniline-based conducting composite was prepared by oxidative polymerisation of aniline in a polyvinylchloride (PVC) matrix. The coherent free standing thin films of the composite were prepared by a solution casting method. The polyvinyl chloride-polyaniline composites exposed to 120 MeV ions of silicon with total ion fluence ranging from 1011 to 1013 ions/cm2, were observed to be more sensitive towards ammonia gas than the unirradiated composite. The response time of the irradiated composites was observed to be comparably shorter. We report for the first time the application of swift heavy ion modified insulating polymer conducting polymer (IPCP) composites for sensing of ammonia gas.
KW  - Biosensor
KW  - Conducing polymer
KW  - ammonia gas sensors
KW  - swift heavy ions
KW  - polymer composites
Y1  - 2006
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1345
ER  - 
TY  - JOUR
A1  - Srnanek, R.
A1  - Geurts, J.
A1  - Lentze, M.
A1  - Irmer, G.
A1  - Donoval, D.
A1  - Brdecka, P.
A1  - Kordos, P.
A1  - Förster, Arnold
A1  - Sciana, B.
A1  - Radziewicz, D.
A1  - Tlaczala, M.
T1  - Study of d-doped GaAs layers by micro-Raman spectroscopy on bevelled samples
JF  - Applied surface science  . 230 (2004), H. 1 -4
Y1  - 2004
SN  - 0169-4332
N1  - ISSN der E-Ausg.: 0169-4332
SP  - 379
EP  - 385
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Failure probabilities of the primary circuit pressure boundary of an HTR-Module for process heat generation under accident conditions for different failure modes
JF  - Nuclear Engineering and Design. 144 (1993), H. 1
Y1  - 1993
SN  - 0029-5493
SP  - 53
EP  - 67
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Plastic collapse analysis of longitudinally flawed pipes and vessels
JF  - Nuclear Engineering and Design. 234 (2004), H. 1-3
Y1  - 2004
SN  - 0029-5493
SP  - 25
EP  - 43
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Local and global collapse pressure of longitudinally flawed pipes and cylindrical vessels
JF  - International Journal of Pressure Vessels and Piping. 82 (2005), H. 3
Y1  - 2005
SN  - 0308-0161
SP  - 217
EP  - 225
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Local and global collapse pressure of longitudinally flawed pipes and cylindrical vessels
N2  - Limit loads can be calculated with the finite element method (FEM) for any component, defect geometry, and loading. FEM suggests that published long crack limit formulae for axial defects under-estimate the burst pressure for internal surface defects in thick pipes while limit loads are not conservative for deep cracks and for pressure loaded crack-faces. Very deep cracks have a residual strength, which is modelled by a global collapse load. These observations are combined to derive new analytical local and global collapse loads. The global collapse loads are close to FEM limit analyses for all crack dimensions.
KW  - Finite-Elemente-Methode
KW  - Grenzwertberechnung
KW  - Axialbelastung
KW  - FEM
KW  - Grenzwertberechnung
KW  - Axialbelastung
KW  - Traglastanalyse
KW  - Limit analysis
KW  - Global and local collapse
KW  - Axially cracked pipe
KW  - Pressure loaded crack-face
Y1  - 2005
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Plastic collapse analysis of longitudinally flawed pipes and vessels
N2  - Improved collapse loads of thick-walled, crack containing pipes and vessels are suggested. Very deep cracks have a residual strength which is better modelled by a global limit load. In all burst tests, the ductility of pressure vessel steels was sufficiently high whereby the burst pressure could be predicted by limit analysis with no need to apply fracture mechanics. The relative prognosis error increases however, for long and deep defects due to uncertainties of geometry and strength data.
KW  - Druckbehälter
KW  - Stahl
KW  - Druckbelastung
KW  - Druckbeanspruchung
KW  - Rohr
KW  - Rohrbruch
KW  - Druckbehälter
KW  - Stahl
KW  - Druckbelastung
KW  - Druckbeanspruchung
KW  - Rohrbruch
KW  - Fehlerstellen
KW  - pipes
KW  - vessels
KW  - load limit
KW  - burst tests
KW  - burst pressure
KW  - flaw
Y1  - 2004
ER  - 
TY  - CHAP
A1  - Staat, Manfred
T1  - Design by Analysis of Pressure Components by non-linear Optimization
N2  - This paper presents the direct route to Design by Analysis (DBA) of the new European pressure vessel standard in the language of limit and shakedown analysis (LISA). This approach leads to an optimization problem. Its solution with Finite Element Analysis is demonstrated for some examples from the DBA-Manual. One observation from the examples is, that the optimisation approach gives reliable and close lower bound solutions leading to simple and optimised design decision.
KW  - Analytischer Zulaessigkeitsnachweis
KW  - FEM
KW  - Einspiel-Analyse
KW  - design-by-analysis
KW  - finite element analysis
KW  - limit and shakedown analysis
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Shakedown and ratchetting under tension-torsion loadings: analysis and experiments
N2  - Structural design analyses are conducted with the aim of verifying the exclusion of ratchetting. To this end it is important to make a clear distinction between the shakedown range and the ratchetting range. The performed experiment comprised a hollow tension specimen which was subjected to alternating axial forces, superimposed with constant moments. First, a series of uniaxial tests has been carried out in order to calibrate a bounded kinematic hardening rule. The load parameters have been selected on the basis of previous shakedown analyses with the PERMAS code using a kinematic hardening material model. It is shown that this shakedown analysis gives reasonable agreement between the experimental and the numerical results. A linear and a nonlinear kinematic hardening model of two-surface plasticity are compared in material shakedown analysis.
KW  - Einspielen <Werkstoff>
KW  - Einspielen
KW  - Ratchetting
KW  - Zug-Druck Belastung
KW  - shakedown
KW  - ratchetting
KW  - tension–torsion loading
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Direct finite element route for design-by-analysis of pressure components
N2  - In the new European standard for unfired pressure vessels, EN 13445-3, there are two approaches for carrying out a Design-by-Analysis that cover both the stress categorization method (Annex C) and the direct route method (Annex B) for a check against global plastic deformation and against progressive plastic deformation. This paper presents the direct route in the language of limit and shakedown analysis. This approach leads to an optimization problem. Its solution with Finite Element Analysis is demonstrated for mechanical and thermal actions. One observation from the examples is that the so-called 3f (3Sm) criterion fails to be a reliable check against progressive plastic deformation. Precise conditions are given, which greatly restrict the applicability of the 3f criterion.
KW  - Einspielen <Werkstoff>
KW  - Plastizität
KW  - Deformation
KW  - Analytischer Zulaessigkeitsnachweis
KW  - Einspiel-Analyse
KW  - fortschreitende plastische Deformation
KW  - alternierend Verformbarkeit
KW  - Einspiel-Kriterium
KW  - Design-by-analysis
KW  - Shakedown analysis
KW  - Progressive plastic deformation
KW  - Alternating plasticity
KW  - Shakedown criterion
Y1  - 2005
ER  - 
TY  - THES
A1  - Staat, Manfred
T1  - Nichtlineare Wellen in elastischen Scheiben
Y1  - 1987
N1  - Aachen, Techn. Hochsch., Diss., 1987
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Reliability of the Primary Circuit Pressure Boundary of an HTR-Module under Accident Conditions
JF  - Safety and reliability assessment : an integral approach ; ESREL'93 ; proceedings of the European Safety and Reliability Conference, Munich, Germany, May 10th - 12th 1993 / Kafka, P. [ed]
Y1  - 1993
SN  - 0-444-81561-9
SP  - 331
EP  - 342
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Some Achievements of the European Project LISA for FEM Based Limit and Shakedown Analysis
JF  - Computational mechanics : developments and applications, 2002 : presented at the 2002 ASME Pressure Vessels and Piping Conference, Vancouver, British Columbia, Canada, August 5 - 9. / Badie, N. [ed]
Y1  - 2002
SN  - 0791846520
N1  - Serie PVP ; vol. 441.
SP  - 177
EP  - 185
PB  - American Society of Mechanical Engineers
CY  - New York
ER  - 
TY  - GEN
A1  - Staat, Manfred
T1  - Technische Mechanik. Vorlesungsmitschrift. Korrigierter Nachdr. der 3. Aufl.
N2  - Überarbeitete, korrigierte und ergänzte Version einer Vorlesungsmitschrift von Sebastian Krämer. 172 S. Inhaltsverzeichnis 0 Einführung in die Mechanik 1 Statik starrer Körper 2 Elastostatik (Festigkeitslehre) 3 Kinematik 4 Kinetik Literatur
KW  - Technische Mechanik
Y1  - 2006
ER  - 
TY  - GEN
A1  - Staat, Manfred
T1  - Engineering Mechanics. Lecture Notes. 2nd edition, translation of the 3rd corrected and extended German edition of "Technische Mechanik"
N2  - English translation of the corrected lectures notes of Sebastian Krämer. Contents 0 Introduction to Mechanics 1 Statics of Rigid Bodies 2 Elastostatics (Strength of Materials) 3 Kinematics 4 Kinetics Literature
KW  - Technische Mechanik
KW  - Mechanics
KW  - Statics
KW  - Elastostatics
KW  - Kinematics
KW  - Kinetics
Y1  - 2006
ER  - 
TY  - CHAP
A1  - Staat, Manfred
T1  - Problems and chances for probabilistic fracture mechanics in the analysis of steel pressure boundary reliability. - Überarb. Ausg.
N2  - In: Technical feasibility and reliability of passive safety systems for nuclear power plants. Proceedings of an Advisory Group Meeting held in Jülich, 21-24 November 1994. - Vienna , 1996. - Seite: 43 - 55 IAEA-TECDOC-920 Abstract: It is shown that the difficulty for probabilistic fracture mechanics (PFM) is the general problem of the high reliability of a small population. There is no way around the problem as yet. Therefore what PFM can contribute to the reliability of steel pressure boundaries is demon­strated with the example of a typical reactor pressure vessel and critically discussed. Although no method is distinguishable that could give exact failure probabilities, PFM has several addi­tional chances. Upper limits for failure probability may be obtained together with trends for design and operating conditions. Further, PFM can identify the most sensitive parameters, improved control of which would increase reliability. Thus PFM should play a vital role in the analysis of steel pressure boundaries despite all shortcomings.
KW  - Bruchmechanik
KW  - probabilistic fracture mechanics
KW  - PFM
Y1  - 2006
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Cyclic plastic deformation tests to verify FEM-based shakedown analyses
N2  - Fatigue analyses are conducted with the aim of verifying that thermal ratcheting is limited. To this end it is important to make a clear distintion between the shakedown range and the ratcheting range (continuing deformation). As part of an EU-supported research project, experiments were carried out using a 4-bar model. The experiment comprised a water-cooled internal tube, and three insulated heatable outer test bars. The system was subjected to alternating axial forces, superimposed with alternating temperatures at the outer bars. The test parameters were partly selected on the basis of previous shakedown analyses. During the test, temperatures and strains were measured as a function of time. The loads and the resulting stresses were confirmed on an ongoing basis during performance of the test, and after it. Different material models were applied for this incremental elasto-plastic analysis using the ANSYS program. The results of the simulation are used to verify the FEM-based shakedown analysis.
KW  - Materialermüdung
KW  - Einspielen <Werkstoff>
KW  - Materialermüdung
KW  - shakedown analyses
KW  - thermal ratcheting
KW  - fatigue analyses
Y1  - 2001
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Direct FEM Limit and Shakedown Analysis with Uncertain Data
N2  - The structural reliability with respect to plastic collapse or to inadaptation is formulated on the basis of the lower bound limit and shakedown theorems. A direct definition of the limit state function is achieved which permits the use of the highly effective first order reliability methods (FORM) is achieved. The theorems are implemented into a general purpose FEM program in a way capable of large-scale analysis. The limit state function and its gradient are obtained from a mathematical optimization problem. This direct approach reduces considerably the necessary knowledge of uncertain technological input data, the computing time, and the numerical error, leading to highly effective and precise reliability analyses.
KW  - Finite-Elemente-Methode
KW  - Einspielen <Werkstoff>
KW  - FEM
KW  - Einspielanalyse
KW  - shakedown
KW  - limit load
KW  - reliability analysis
KW  - FEM
KW  - direct method
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Basis Reduction for the Shakedown Problem for Bounded Kinematic Hardening Material
N2  - Limit and shakedown analysis are effective methods for assessing the load carrying capacity of a given structure. The elasto–plastic behavior of the structure subjected to loads varying in a given load domain is characterized by the shakedown load factor, defined as the maximum factor which satisfies the sufficient conditions stated in the corresponding static shakedown theorem. The finite element dicretization of the problem may lead to very large convex optimization. For the effective solution a basis reduction method has been developed that makes use of the special problem structure for perfectly plastic material. The paper proposes a modified basis reduction method for direct application to the two-surface plasticity model of bounded kinematic hardening material. The considered numerical examples show an enlargement of the load carrying capacity due to bounded hardening.
KW  - Finite-Elemente-Methode
KW  - Einspielen <Werkstoff>
KW  - Basis Reduktion
KW  - konvexe Optimierung
KW  - FEM
KW  - Druckgeräte
KW  - Basis reduction
KW  - Convex optimization
KW  - FEM
KW  - Shakedown analysis
Y1  - 2000
ER  - 
TY  - CHAP
A1  - Staat, Manfred
T1  - Limit and shakedown analysis under uncertainty
T2  - Proceedings International Conference on Advances in Computational Mechanics (ACOME)
Y1  - 2012
N1  - International Conference on Advances in Computational Mechanics (ACOME), August 14-16, 2012, Ho Chi Minh City, Vietnam
SP  - 837
EP  - 861
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - LISA - a European project for FEM-based limit and shakedown analysis
N2  - The load-carrying capacity or the safety against plastic limit states are the central questions in the design of structures and passive components in the apparatus engineering. A precise answer is most simply given by limit and shakedown analysis. These methods can be based on static and kinematic theorems for lower and upper bound analysis. Both may be formulated as optimization problems for finite element discretizations of structures. The problems of large-scale analysis and the extension towards realistic material modelling will be solved in a European research project. Limit and shakedown analyses are briefly demonstrated with illustrative examples.
KW  - Einspielen <Werkstoff>
KW  - Traglast
KW  - Finite-Elemente-Methode
KW  - Traglastanalyse
KW  - Einspielanalyse
KW  - FEM
KW  - limit analysis
KW  - shakedown analysis
Y1  - 2001
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Anisotrope Wellenausbreitung in isotropen hyperelastischen Scheiben
JF  - Zeitschrift für angewandte Mathematik und Mechanik : ZAMM. 67 (1987), H. 4
Y1  - 1987
SN  - 0946-8463
SP  - T241
EP  - T243
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Limit and shakedown analysis under uncertainty
JF  - International journal of computational methods : IJCM
Y1  - 2013
SN  - 0219-8762
SP  - Publ. online
PB  - World Scientific Publishing
CY  - Singapore
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Sensitivity of and Influences on the Reliability of an HTR-Module Primary Circuit Pressure Boundary
JF  - Transactions of the 12th International Conference on Structural Mechanics in Reactor Technology (SMiRT-12) / Kussmaul, K. [ed]
Y1  - 1993
SN  - 0-444-81515-5
N1  - Vol. M, Paper MG10/2
SP  - 147
EP  - 152
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Problems and Chances for Probabilistic Fracture Mechanics in the Analysis of Steel Pressure Boundary Reliability
JF  - Technical feasibility and reliability of passive safety systems for nuclear power plants. Proceedings of an Advisory Group Meeting held in Jülich, 21-24 November 1994
Y1  - 1996
N1  - IAEA-TECDOC-920 ; Onlinezugriff erfolgt auf die überarb. Ausg. 2006
SP  - 43
EP  - 55
CY  - Vienna
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Versagenswahrscheinlichkeit der Primärkreisdruckumschließung eines HTR-Moduls zur Prozeßwärmegewinnung unter Störfallbedingungen
JF  - Jahrestagung Kerntechnik '91 / Kerntechnische Gesellschaft e.V. ; Deutsches Atomforum e.V
Y1  - 1991
SP  - 123
EP  - 126
PB  - INFORUM
CY  - Bonn
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Rezension zu: K. Zimmermann, Technische Mechanik – multimedial. Fachbuch Verlag Leipzig (2000)
JF  - Technische Mechanik
Y1  - 2002
SN  - 0232-3869
VL  - 22
IS  - 1
SP  - 76
EP  - 77
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Limit and shakedown analysis under uncertainty
JF  - Tap chi Khoa hoc & ung dung - Dai hoc Ton Duc Thang
Y1  - 2012
N1  - = Journal of Applied Sciences - Ton Duc Thang University
VL  - 19
SP  - 45
EP  - 47
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Probabilistische Bewertung des bruchmechanischen Verhaltens der Primärkreisdruckumschließung eines HTR-Moduls
Y1  - 1992
N1  - 18. MPA-Seminar : Sicherheit und Verfügbarkeit in der Anlagentechnik mit dem Schwerpunkt Kernenergie. Stuttgart (1992), 27.1-27.18
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Probabilistic assessment of the fracture mechanics behaviour of an HTR-module primary circuit pressure boundary
JF  - Nuclear Engineering and Design. 160 (1996), H. 1-2
Y1  - 1996
SN  - 0029-5493
SP  - 221
EP  - 236
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Reliability of an HTR-module primary circuit pressure boundary Influences, sensitivity, and comparison with a PWR
JF  - Nuclear Engineering and Design. 158 (1995), H. 2-3
Y1  - 1995
SN  - 0029-5493
SP  - 333
EP  - 340
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - Versagenswahrscheinlichkeit der Primärkreisdruckumschließung eines HTR-Moduls zur Prozeßwärmegewinnung unter Störfallbedingungen bei verschiedenen Versagensmoden
Y1  - 1991
N1  - 17. MPA-Seminar : Sicherheit und Verfügbarkeit in der Anlagentechnik mit dem Schwerpunkt Kerntechnik, Stuttgart (1991), 22.1-22.20
ER  - 
TY  - JOUR
A1  - Staat, Manfred
T1  - An extension strain type Mohr–Coulomb criterion
JF  - Rock mechanics and rock engineering
N2  - Extension fractures are typical for the deformation under low or no confining pressure. They can be explained by a phenomenological extension strain failure criterion. In the past, a simple empirical criterion for fracture initiation in brittle rock has been developed. In this article, it is shown that the simple extension strain criterion makes unrealistic strength predictions in biaxial compression and tension. To overcome this major limitation, a new extension strain criterion is proposed by adding a weighted principal shear component to the simple criterion. The shear weight is chosen, such that the enriched extension strain criterion represents the same failure surface as the Mohr–Coulomb (MC) criterion. Thus, the MC criterion has been derived as an extension strain criterion predicting extension failure modes, which are unexpected in the classical understanding of the failure of cohesive-frictional materials. In progressive damage of rock, the most likely fracture direction is orthogonal to the maximum extension strain leading to dilatancy. The enriched extension strain criterion is proposed as a threshold surface for crack initiation CI and crack damage CD and as a failure surface at peak stress CP. Different from compressive loading, tensile loading requires only a limited number of critical cracks to cause failure. Therefore, for tensile stresses, the failure criteria must be modified somehow, possibly by a cut-off corresponding to the CI stress. Examples show that the enriched extension strain criterion predicts much lower volumes of damaged rock mass compared to the simple extension strain criterion.
Y1  - 2021
U6  - https://doi.org/10.1007/s00603-021-02608-7
SN  - 1434-453X
N1  - Corresponding author: Manfred Staat
VL  - 54
IS  - 12
SP  - 6207
EP  - 6233
PB  - Springer Nature
CY  - Cham
ER  -