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  - 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  - BOOK
A1  - Graf, Günter
A1  - Groß, Heinz
A1  - Sponagel, Stefan
T1  - Verfahren zur Herstellung eines Dichtringes : Europäische Patentschrift EP0250642B1 ; Veröffentlichungstag der Patentschrift: 11.02.1988
Y1  - 1988
N1  - Volltext über Datenbank DEPATISnet
PB  - Europäisches Patentamt
CY  - [München u.a.]
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  - 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  - 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  - 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  - 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  - 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
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  - Frank, T.
A1  - Buchwald, D.
A1  - Pennekamp, W.
A1  - Reber, D.
A1  - Sponagel, Stefan
A1  - Laszkovics, A.
A1  - Weber, Hans-Joachim
T1  - Röntgenologische Untersuchung der Strömungseigenschaften funktioneller Komponenten der Herz-Lungen-Maschine
JF  - Kardiotechnik. 18 (2009), H. 2
Y1  - 2009
SN  - 0941-2670
N1  - gedruckt in der Bibliothek unter der Signatur 63 Z 629
SP  - 31
EP  - 35
ER  - 
TY  - JOUR
A1  - Baroud, G.
A1  - Wu, J.Z.
A1  - Bohner, M
A1  - Sponagel, Stefan
A1  - Steffen, T.
T1  - How to determine the permeability for cement infiltration into osteoporotic cancellous bone
JF  - Medical Engineering & Physics. 25 (2003), H. 4
N2  - Cement augmentation is an emerging surgical procedure in which bone cement is used to infiltrate and reinforce osteoporotic vertebrae. Although this infiltration procedure has been widely applied, it is performed empirically and little is known about the flow characteristics of cement during the injection process. We present a theoretical and experimental approach to investigate the intertrabecular bone permeability during the infiltration procedure. The cement permeability was considered to be dependent on time, bone porosity, and cement viscosity in our analysis. In order to determine the time-dependent permeability, ten cancellous bone cores were harvested from osteoporotic vertebrae, infiltrated with acrylic cement at a constant flow rate, and the pressure drop across the cores during the infiltration was measured. The viscosity dependence of the permeability was determined based on published experimental data. The theoretical model for the permeability as a function of bone porosity and time was then fit to the testing data. Our findings suggest that the intertrabecular bone permeability depends strongly on time. For instance, the initial permeability (60.89 mm4/N.s) reduced to approximately 63% of its original value within 18 seconds. This study is the first to analyze cement flow through osteoporotic bone. The theoretical and experimental models provided in this paper are generic. Thus, they can be used to systematically study and optimize the infiltration process for clinical practice.
KW  - Osteoporose
KW  - Permeabilität
KW  - Viskose Strömung
KW  - Viskosität
KW  - Vertebroplastie
KW  - Cement infiltration
KW  - Vertebroplasty
KW  - Osteoporosis
KW  - Permeability
KW  - Experiment
KW  - Analysis
KW  - Viscous flow
Y1  - 2003
SN  - 1350-4533
SP  - 283
EP  - 288
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Behr, M.
A1  - Hormes, M.
A1  - Steinseifer, U.
A1  - Arora, D.
A1  - Coronado, O.
A1  - Pasquali, M.
T1  - A Review of Computational Fluid Dynamics Analysis of Blood Pumps
JF  - European Journal of Applied Mathematics. 20 (2009), H. 4
Y1  - 2009
SP  - 363
EP  - 397
PB  - Cambridge Univ. Press
CY  - Cambridge
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Finocchiaro, Thomas
A1  - Heinke, Stefanie
A1  - Leßmann, Marc
T1  - Methods of design, simulation, and control for the development of new VAD/TAH concepts = Methoden zur Konstruktion, Simulation und Regelung für die Entwicklung von neuen VAD/TAH-Konzepten / Finocchiaro, Thomas ; Heinke, Stefanie ; Behbahani, Mehdi ; Leßma
JF  - Biomedizinische Technik / Biomedical Engineering. 54 (2009), H. 5
Y1  - 2009
SN  - 0013-5585
N1  - Printausgabe in der Bereichsbibliothek Jülich vorhanden : 63 Z 471
SP  - 269
EP  - 281
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Spillner, Jan
A1  - Kopp, Rüdiger
A1  - Finocchiaro, Thomas
T1  - Assistierte Zirkulation : ein Überblick aus klinischer Sicht = Assisted circulation: an overview from a clinical perspective / Spillner, Jan ; Kopp, Rüdiger ; Finocchiaro, Thomas ; Behbahani, Mehdi ; Rossaint, Rolf ; Steinseifer, Ulrich ; Behr, Marek ; Au
JF  - Biomedizinische Technik / Biomedical Engineering. 54 (2009), H. 5
Y1  - 2009
SN  - 0013-5585
N1  - Printausgabe in der Bereichsbibliothek Jülich vorhanden : 63 Z 471
SP  - 255
EP  - 267
PB  - De Gruyter
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Behr, Marek
A1  - Nicolai, Mike
A1  - Probst, Markus
T1  - Towards Shape Optimization for Ventricular Assist Devices Using Parallel Stabilized FEM
JF  - NIC Symposium 2008 : symposium, 20 - 21 February 2008, Forschungszentrum Jülich ; proceedings / organized by John von Neumann Institute for Computing. Ed. by Gernot Münster; Dietrich Wolf; Manfred Kremer (ed.)
Y1  - 2008
SN  - 978-3-9810843-5-1
N1  - NIC series ; 39
SP  - 325
EP  - 332
PB  - Forschungszentrum
CY  - Jülich
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Nicolai, M.
A1  - Probst, M.
A1  - Behr, M.
T1  - Simulation of Blood Flow in a Ventricular Assist Device
JF  - inSIDE. 5 (2007), H. 1
Y1  - 2007
SP  - 28
EP  - 31
ER  -