TY - BOOK A1 - Janz, Norbert A1 - Rammer, Christian A1 - Ebling, Günther A1 - Peters, Bettina T1 - Innovationsverhalten der deutschen Wirtschaft: Indikatorenbericht zur Innovationserhebung 2002 / Rammer, C., G. Ebling, S. Gottschalk, N. Janz, B. Peters und T. Schmidt Y1 - 2003 N1 - online unter ftp://ftp.zew.de/pub/zew-docs/mip/02/ib_2002.pdf PB - ZEW Zentrum für Europäische Wirtschaftsforschung CY - Mannheim ER - TY - BOOK A1 - Janz, Norbert T1 - Innovationsforschung heute : die Mannheimer Innovationspanels / Norbert Janz ; Georg Licht (Hrsg.) Y1 - 2003 SN - 3-7890-8361-5 N1 - ZEW-Wirtschaftsanalysen ; 63 PB - Nomos-Verl.-Ges. CY - Baden-Baden ER - TY - JOUR A1 - Hagemann, Hans-Jürgen T1 - INGMEDIA - Lernsoftware für technische und physikalische Praktika in Ingenieurstudiengängen JF - E-Learning : Tagungsband ; NMB-Projekte in den Ingenieurwissenschaften ; Workshop der ingenieurwissenschaftlichen Projekte im bmb+f-Förderprogramm "Neue Medien in der Bildung" am 25. und 26. Juni 2003 an der Hochschule Anhalt in Dessau / Hrsg.: Stephan Pi Y1 - 2003 N1 - Workshop E-Learning: NMB-Projekte in den Ingenieurwissenschaften <2003, Dessau> SP - 64 EP - 69 PB - Hochschule Anhalt CY - Dessau ER - TY - JOUR A1 - Raatschen, Hans-Jürgen T1 - Ingenieurstudium Hundert Jahre : von der Königlichen Höheren Maschinenbauschule Aachen zu den Ingenieurfachbereichen der Fachhochschule JF - Fachblatt Y1 - 2003 VL - 2003 IS - 1 SP - 28 EP - 29 ER - TY - JOUR A1 - Klocke, Martina T1 - Ingenieurinnen dringend gesucht JF - Von der Dampfmaschine zur Brennstoffzelle : 100 Jahre Ingenieurausbildung in Kiel / [Hrsg. Fachhochschule Kiel. Red. Martina Klocke] Y1 - 2003 SP - 52 EP - 55 PB - Fachhochschule CY - Kiel ER - TY - CHAP A1 - Ziller, Claudia A1 - Döring, Bernd ED - Carmeliet, J. ED - Hens, H. ED - Vermeir, G. T1 - Influence of the external dynamic wind pressure on the ventilation of double facades T2 - Research in building physics: proceedings of the Second International Conference on Building Physics : Leuven, Belgium, 14-18 September 2003 Y1 - 2003 SN - 9058095657, 9789058095657 SP - 527 EP - 533 PB - Taylor and Francis CY - Hoboken ER - TY - JOUR A1 - Pietschmann, Bernd P. A1 - Niclas, Falco T1 - Impulse für erfolgreiche Führung JF - Personal : Zeitschrift für Human Resource Management. 55 (2003), H. 4 Y1 - 2003 SN - 0031-5605 SP - 16 EP - 20 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 - JOUR A1 - Öhlschläger, Peter A1 - Osen, Wolfram A1 - Dell, Kerstin A1 - Faath, Stefan T1 - Human papillomavirus type 16 L1 capsomeres induce L1-specific cytotoxic T lymphocytes and tumor regression in C57BL/6 mice / Öhlschläger, Peter ; Osen, Wolfram ; Dell, Kerstin ; Faath, Stefan ; Garcea Robert L: ; Jochmus, Ingrid ; Müller, Martin, Pawlita, JF - Journal of Virology. 77 (2003), H. 8 Y1 - 2003 SN - 1098-5514 SP - 4635 EP - 4645 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 -