TY - CHAP
A1 - Ritz, Thomas
T1 - DISMED - an innovation portal for printing and media industry
T2 - CRIS 2000 : the fifth conference on Current Research Information Systems in Europe, in Helsinki (Finland), 25-27 May 2000
Y1 - 2001
N1 - Programmpunkt: Cybercafé.
PB - CORDIS Archive
CY - [s.l.]
ER -
TY - JOUR
A1 - Ritz, Thomas
T1 - Information Channels
JF - Information Technology. Nr. 52 (2000), H. 08. Mai 2000
Y1 - 2000
SP - 15
EP - 15
ER -
TY - JOUR
A1 - Hagemann, Hans-Jürgen
A1 - Breitschuh, S.
A1 - Graber, S.
A1 - Schmitz, Günter
T1 - Internet Laboratory Courses with Remote Access and Control of Real Measurements on Sensors and Electronic Components
JF - Mechatronics & Robotics 2004 : Aachen, Germany, September 13 - 15, 2004 / [APS - European Centre for Mechatronics]. P. Drews (ed.)
Y1 - 2004
SN - 3-938153-30-X
N1 - MechRob <2004, Aachen>
SP - 1280
EP - 1284
PB - Eysoldt
CY - Aachen
ER -
TY - JOUR
A1 - Hagemann, Hans-Jürgen
A1 - Bachmann, P. K.
A1 - Lade, H.
A1 - Leers, D.
T1 - Thermal properties of C/H-, C/H/O-, C/H/N- and C/H/X-grown polycrystalline CVD diamond. P. K. Bachmann, H. J. Hagemann, H. Lade, ...
JF - Diamond and Related Material. Vol 4. (1995), H. Issue 5-6
Y1 - 1995
N1 - abstract online:
SP - 820
EP - 826
PB - Elsevier Science
CY - New York, NY [u.a.]
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Stolle, Reinhard
A1 - Schiek, Burkhard
T1 - Novel Algorithms for FMCW Range Finding with Microwaves. Stolle, R.; Heuermann, H.; Schiek, B.
Y1 - 1995
N1 - Conference proceedings / IEEE NTC '95, the Microwave Systems Conference; NTC <1995, Orlando, Fla.>
SP - 129
EP - 132
ER -
TY - CHAP
A1 - Ritz, Thomas
T1 - Production and distribution of personalized information services employing mass customization
T2 - 2nd Interdisciplinary World Congress on Mass Customization and Personalization : MCPC'03, October 6 - 8, 2003, Technische Universität München, Munic, Germany
Y1 - 2003
SP - Part IV
PB - Techn. Univ. (TUM)
CY - München
ET - CD-Ausg.
ER -
TY - CHAP
A1 - Stender, Michael
A1 - Ritz, Thomas
T1 - Modeling of business-to-business mobile commerce processes
T2 - Electronic proceedings / ICPR 17, 17th International Conference on Production Research [Blacksburg, Virginia, USA, August 3 - 7, 2003]
Y1 - 2003
SN - 0-9721257-3-6
CY - Blacksburg, Va.
ET - CD-ROM-Ausg.
ER -
TY - JOUR
A1 - Krause, Gregor
A1 - Fruth, B.
T1 - Dielectric Properties of Polyolefins Stressed by High Electrical Fields / Fruth, B. ; Krause, G.
JF - Plenary lectures and contributions presented at the International Symposium on Polymer Materials : held in San Sebastian (Donostia), Spain, 31 August - 4 September, 1987 / symposium ed. G. M. Guzmán ; A. Santamaria
Y1 - 1988
SN - 3-85739-220-7
N1 - International Symposium on Polymer Materials <1987, San Sebastián, Golfo de Vizcaya>
PB - Huethig & Wepf
CY - Basel
ER -
TY - JOUR
A1 - Krause, Gregor
A1 - Schuppe, W.D.
A1 - Saure, M.
A1 - Andress, H.
T1 - Sensitive Analytical and Physical Methods for Diagnosis of Variations in Polyolefin Plaques and Cable Insulations / W.D. Schuppe, M. Saure, H. Andress, K. Möller, D. Meurer, G. Krause
JF - Proceedings of the 32nd session : 28th August - 3rd September.
Y1 - 1988
N1 - International Conference on Large Electric Systems, CIGRÉ <32, Paris, 1988>
ER -
TY - JOUR
A1 - Krause, Gregor
A1 - Meurer, D.
A1 - Klee, D.
T1 - Space Charge Formation Related to the Morphology of Polymers
JF - ISE 6 : 6th International symposium on electrets : Papers
Y1 - 1988
N1 - International Symposium on Electrets <6, 1988, Oxford>
PB - IEEE
CY - Piscataway, NY
ER -
TY - JOUR
A1 - Krause, Gregor
A1 - Möller, K.
A1 - Meurer, D.
T1 - Dielectric phenomena in semicrystalline polymers
JF - IEEE Transaction on Electrical Insulation. Vol. 24 (1989), H. No. 2
Y1 - 1989
N1 - Digital Object Identifier 10.1109/14.90276
SP - 215
EP - 222
ER -
TY - JOUR
A1 - Krause, Gregor
A1 - Meurer, D.
A1 - Klee, D.
T1 - Space charge formation related to the morphology of polymers
JF - IEEE Transaction on Electrical Insulation. Vol. 24 (1989), H. No. 3
Y1 - 1989
N1 - Digital Object Identifier 10.1109/14.30883
SP - 215
EP - 222
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, B.
T1 - Robust Algorithms for Txx Network Analyzer Self-Calibration Procedures
JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 43 (1994), H. 1
Y1 - 1994
SN - 0018-9456
SP - 18
EP - 23
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, B.
T1 - Error corrected impedance measurements with a network analyzer
JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 44 (1995), H. 2
Y1 - 1995
SN - 0018-9456
SP - 295
EP - 299
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, B.
T1 - Results of network analyzer measurements with leakage errors-corrected with direct calibration techniques
JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5
Y1 - 1997
SN - 0018-9456
SP - 1120
EP - 1127
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, B.
T1 - 15-term self-calibration methods for the error-correction of on-wafer measurements
JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5
Y1 - 1997
SN - 0018-9456
SP - 1105
EP - 1110
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, Burkhard
T1 - Line Network Network (LNN): an alternative in-fixture calibration procedure
JF - IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society. 45 (1997), H. 3
Y1 - 1997
SN - 0018-9480
SP - 408
EP - 413
ER -
TY - JOUR
A1 - Heuermann, Holger
T1 - Calibration procedures with series impedances and unknown lines simplify on-wafer measurements
JF - IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society. 47 (1999), H. 1
Y1 - 1999
SN - 0018-9480
SP - 1
EP - 5
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, Burkhard
T1 - Calibration of network analyser measurements with leakage errors
JF - Electronics letters. 30 (1994), H. 1
Y1 - 1994
SN - 0013-5194
SP - 52
EP - 53
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, Burkhard
T1 - Error Corrected Impedance Measurements with a Network Analyzer
Y1 - 1994
N1 - 1994 Conference on Precision Electromagnetic Measurements digest : 27 June - 1 July 1994, Boulder, Colorado, USA / Organized by National Institute of Standards and Technology. Ed. by Edie DeWeese
SP - 125
EP - 126
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, Burkhard
T1 - A Generalization of the Txx Network Analyzer Self-Calibration Procedure
JF - Conference proceedings : monday 24th to thursday 27th august 1992, Helsinki University of Technology, Espoo, Finland ; [the international conference and exhibition designed for the Microwave Community]. Vol. 2
Y1 - 1992
SN - 0-946821-77-1
N1 - European Microwave Conference <22, 1992, Espoo> ; Teknillinen Korkeakoulu
SP - 907
EP - 912
PB - Microwave Exhibitions and Publishers
CY - Tunbridge Wells
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, Burkhard
T1 - The In-Fixture Calibration Procedure Line-Network-Network-LNN
JF - Conference proceedings : monday 6th to thursday 9th september 1993, Palacio de Congresos, Madrid, Spain ; [the international conference and exhibition designed for the Microwave Community]
Y1 - 1992
SN - 0-946821-23-2
N1 - European Microwave Conference <23, 1993, Madrid>
SP - 500
EP - 505
PB - Reed Exhibition Companies
CY - Tunbridge Wells
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, Burkhard
T1 - Scattering Parameter Measurements of Microstrip Devices using the Double-LNN Calibration Technique
JF - Conference proceedings : [Palais des Festivals et des Congrès Cannes, France, 5 - 8 September 1994]
Y1 - 1994
SN - 0-9518032-5-5
N1 - European Microwave Conference <24, 1994, Cannes>
PB - Nexus Business Communications
CY - Swanley
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, Burkhard
T1 - The double-LNN Calibration technique for scattering parameter measurements of microstrip devices
JF - Conference proceedings
Y1 - 1995
N1 - European Microwave Conference <25, 1995, Bologna>
SP - 343
EP - 347
PB - NEXUS House
CY - Kent
ER -
TY - JOUR
A1 - Heuermann, Holger
T1 - LZY: A Self-Calibration Approach in Competition to the LRM Method for On-Wafer Measurements
Y1 - 1995
N1 - 45th ARFTG Conference digest, Spring 1995 : [conference topic: Testing and design of RFIC'S], May 19, 1995, Orange County Convention Center, Orlando, Florida / Automatic RF Techniques Group. Publications chairman: Ed Godshalk; ARFTG Conference digest ; 4
SP - 129
EP - 136
ER -
TY - JOUR
A1 - Heuermann, Holger
T1 - Sure Methods of On-Wafer Scattering Parameter Measurements with Self-Calibration Procedures
Y1 - 1996
N1 - 46th ARFTG conference digest : November 30 - December 1. 1995, Safari Resort, Scottsdale, Arizona / Automatic RF Techniques Group. [Publ. chairman: Ed. Godshalk]
SP - 136
EP - 145
ER -
TY - JOUR
A1 - Heuermann, Holger
T1 - Microwave On-Wafer Measurements with Activ Needle Probe Tips
Y1 - 1997
N1 - 47th ARFTG Conference digest : June 20 - 21, 1996, Moscone Convention Center, San Francisco, California / Automatic RF Techniques Group. [Publication chair: Ed Godshalk
SP - 208
EP - 214
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, Burkhard
T1 - Results of Network Analyzer Measurements with Leakage Errors Corrected with the TMS-15-Term Procedure
Y1 - 1994
N1 - 1994 IEEE MTT-S International Microwave Symposium digest : May 23 - 27, 1994, San Diego Convention Center, San Diego, California / H. J. Kuno, ed.
SP - 1361
EP - 1364
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Baumann, F.-M.
A1 - Fauth, G.
A1 - Albert, M.
T1 - Results of Network Analyzer Measurements with Leakage Errors Corrected with the TMS-15-Term Procedure
JF - On-Line Moisture Analysis of Raw Coal
Y1 - 1994
N1 - 1993 International Symposium on On-Line Analysis of Coal : Vienna ; [proceedings].
SP - 1361
EP - 1364
ER -
TY - JOUR
A1 - Fabo, Sabine
ED - Könches, Barbara
T1 - Welcome to the training: Actionist Respoke interaktiv by Michael Jonoschek und Rüdiger Schlömer
JF - Bilder-Codes : Internationaler Medienkunstpreis 2002
Y1 - 2002
SN - 3-928201-28-X
SP - 41
EP - 48
PB - ZKM
CY - Karlsruhe
ER -
TY - JOUR
A1 - Wrede, Oliver
T1 - Mnemotechnik in graphischen Benutzeroberflächen
JF - Form / Form-Diskurs : Zeitschrift für Design und Theorie. 1 (1996), H. 2
Y1 - 1996
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, Burkhard
T1 - LNN (Line-Network-Network): Verfahren zur Kalibrierung von Netzwerkanalysatoren
JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 36. 1992 (1992)
Y1 - 1992
SP - 327
EP - 335
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, Burkhard
T1 - LNN( Line-Network-Network): The In-Fixture Calibration Procedure
Y1 - 1993
N1 - XXIVth General Assembly of the International URSI, Kyoto
SP - 149
EP - 149
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Schiek, Burkhard
T1 - A Fast and Robust Procedure for the Determination of the Scattering Parameters for Network Analyzer Calibration
Y1 - 1992
N1 - Precision electromagnetic measurements : conference Paris, 9-12 June 1992 = Conférence sur les Mesures Electromagnétiques de Précision.
SP - 373
EP - 374
CY - Paris
ER -
TY - JOUR
A1 - Hagemann, Hans-Jürgen
A1 - Backhaus, U.
A1 - Goessner, S.
T1 - Collaborative eLearning Concepts for University Level Online Laboratory Courses in Engineering. U. Backhaus, S. Goessner, H. J. Hagemann
JF - Proceedings Online Educa Berlin: 8th International Conference on Technology Supported Learning & Training. 2002
Y1 - 2002
N1 - Online Educa <2002, Berlin>
SP - 62
EP - 66
ER -
TY - JOUR
A1 - Krause, Gregor
A1 - Fruth, Bernhard
T1 - Dielectric Properties of Polyolefins Stressed by High Electrical Fields. Fruth, B. ; Krause, G.
Y1 - 1987
N1 - Fifth International Symposium on High Voltage Engineering : Proceedings; Braunschweig, Stadthalle, August, 24-28, 1987 / International Symposium on High Voltage Engineering <5, 1987, Braunschweig>
ER -
TY - JOUR
A1 - Krause, Gregor
A1 - Göttlich, S.
A1 - Möller, K.
A1 - Meurer, D.
T1 - Space Charge Phenomena in Partially Crystalline Polymers: On-Line Measurement of Charge Carrier Motion under High AC-Field Strength / G. Krause, S. Göttlich, K. Möller, D. Meurer
JF - Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics : Trondheim, Norway ... 1989
Y1 - 1989
N1 - International Conference on Conduction and Breakdown in Solid Dielectrics <3, 1989, Trondheim>
PB - IEEE
CY - Piscataway, N.J.
ER -
TY - JOUR
A1 - Krause, Gregor
A1 - Neubert, R.
A1 - Pietsch, R.
T1 - Investigations of Electrical Aging in Polymers under High AC-Field Strength
JF - 1990 annual report : October 28 - October 31, 1990 / sponsored by the IEEE Dielectrics and Electrical Insulation Society
Y1 - 1990
N1 - Conference on Electrical Insulation and Dielectric Phenomena ; (59, 1990, Pocono Manor, Pa.)
PB - IEEE Service Center
CY - Piscataway, N.J
ER -
TY - JOUR
A1 - Krause, Gregor
T1 - High Field Phenomena of Polymeric Insulation Investigated at PE Needle-Plane Specimen
JF - Seventh International Symposium on High Voltage Engineering : Dresden, August 26 - 30, 1991 / Technische Universität Dresden
Y1 - 1991
N1 - International Symposium on High Voltage Engineering ; (7, 1991, Dresden); International Symposium on High Voltage Engineering (ISH) ; (7 : ; 1991.08.26-30 : ; Dresden)
PB - TU Dresden
CY - Dresden
ER -
TY - JOUR
A1 - Kämper, Klaus-Peter
A1 - Kurzawa, R.
A1 - Schmitt, W.
A1 - Güntherodt, G.
T1 - Spin-resolved photoemission study of in situ grown epitaxial Fe layers on W(110). Kurzawa, R.; Kämper, K.-P.; Schmitt, W.; Güntherodt, G.
JF - Solid State Communications. 60 (1986), H. 10
Y1 - 1986
SN - 0038-1098
SP - 777
EP - 780
ER -
TY - JOUR
A1 - Siepmann, Thomas
A1 - Rupietta, D.
T1 - Closer to the customer with computerized product support
JF - Technische Mitteilungen Krupp (1993)
Y1 - 1993
CY - Essen
ER -
TY - JOUR
A1 - Siepmann, Thomas
A1 - Schuh, G.
A1 - Levering, V.
T1 - PROPLAN / Schuh, G.; Siepmann, Th.; Levering, V.
JF - Handbook on architectures of information systems : with 24 tables / Peter Bernus ... (ed.)
Y1 - 1998
SN - 3-540-64453-9
N1 - International handbooks on information systems ; 1
PB - Springer
CY - Berlin [u.a.]
ER -
TY - BOOK
A1 - Siepmann, Thomas
T1 - Modeller for Value Systems
Y1 - 1997
PB - Erasmus Universiteit Rotterdam
CY - Rotterdam
ER -
TY - JOUR
A1 - Siepmann, Thomas
T1 - Exploitation Plan of the TELEflow Project
Y1 - 1999
N1 - 4th Framework Programme Report
CY - Brussels
ER -
TY - JOUR
A1 - Fabo, Sabine
T1 - Arts and media : towards an universal understanding
JF - Leonardo
Y1 - 1993
SN - 0024-094X
VL - 26(1993)
IS - 4
SP - 316
EP - 319
ER -
TY - BOOK
A1 - Benkner, Thorsten
A1 - David, Klaus
T1 - Digital Mobile Radio Systems (Nicht erschienen?)
Y1 - 2005
SN - 0-471-97591-5
N1 - Erscheinungstermin 30.10.2005
PB - Wiley
ER -
TY - JOUR
A1 - Hagemann, Hans-Jürgen
A1 - Bachmann, P.K.
A1 - Lade, H.
A1 - Leers, D.
T1 - CVD Diamond Growth: Gas Compositions and Film Properties / P.K. Bachmann, H.J. Hagemann, H. Lade, D. Leers, D.U. Wiechert and H. Wilson
JF - Advanced materials '94 : proceedings of the NIRIM International Symposium on Advanced Materials '94, Tsukuba, Japan, March 13 - 17, 1994 / National Institute for Research in Inorganic Materials. Ed. by M. Kamo ...
Y1 - 1994
N1 - NIRIM International Symposium on Advanced Materials ; 1994 (Tsukuba) : 1994.03.13-17
SP - 115
EP - 120
PB - International Communications Specialists
CY - Tokyo
ER -
TY - JOUR
A1 - Hagemann, Hans-Jürgen
A1 - Bachmann, P.K.
A1 - Lade, H.
A1 - Leers, D.
T1 - Diamond chemical vapor deposition: gas compositions and film properties / Bachmann, P.K.; Hagemann, H.-J.; Lade, H; Leers, D.; Picht, F.; Wiechert, D.U.; Wilson, H.
JF - Diamond, SiC and nitride wide bandgap semiconductors : symposium held April 4 - 8, 1994, San Francisco, California, U.S.A. / ed.: Calvin H. Carter, Jr. ...
Y1 - 1994
SN - 1-55899-239-1
N1 - Materials Research Society symposium proceedings ; 339
SP - 267
EP - 277
CY - Pittsburgh, Penn.
ER -
TY - JOUR
A1 - Kämper, Klaus-Peter
A1 - Berg, U.
A1 - Begemann, M.
A1 - Hagemann, B. (u.a.)
T1 - Series production and testing of a micro motor. Serienfertigung und Prüfung eines Mikromotors
JF - Actuator 98 : 6th International Conference on New Actuators ; 17 - 19 June, 1998, Bremen, Germany ; conference proceedings / ed.: Hubert Borgmann ...
Y1 - 1998
SN - 3-933339-00-6
N1 - Konferenz-Einzelbericht: ACTUATOR, Internat. Conf. on New Actuators
SP - 552
EP - 555
PB - Messe Bremen
CY - Bremen
ER -
TY - JOUR
A1 - Kämper, Klaus-Peter
A1 - Döpper, J.
A1 - Clemens, M.
A1 - Ehrfeld, W.
T1 - Micro gear pumps for dosing of viscous fluids. / Döpper, J. (u.a.)
JF - Journal of Micromechanics and Microengineering. 7 (1997), H. 3
Y1 - 1997
SN - 0960-1317
SP - 230
EP - 232
ER -
TY - JOUR
A1 - Kämper, Klaus-Peter
A1 - Lehr, H.
A1 - Abel, S.
A1 - Döpper, J.
T1 - Microactuators as driving units for microrobotic systems. Herstellung von Mikroaktoren mit dem LIGA-Verfahren für Mikroroboter / Lehr, H.; Abel, S.; Döpper, J.; Ehrfeld, W.; Hagemann, B.; Kämper, K.-P.; Michel, F.; Schulu, c.; Thürigen, C.
JF - Proceedings of the SPIE - The International Society for Optical Engineering
Y1 - 1996
SN - 0277-786X
N1 - Konferenz-Einzelbericht.
SP - 202
EP - 210
ER -
TY - JOUR
A1 - Kämper, Klaus-Peter
T1 - Development of low-cost injection moulded micropumps. Entwicklung von kostengünstigen, mittels Spritzguß hergestellten Mikropumpen / Döpper, J. (u.a.)
JF - Actuator 96 : Conference Proceedings ; 5th International Conference on New Actuators ; 26- 28 June, Bremen, Germany / Ed.: Hubert Borgmann. Publ. by: AXON Technology Consult GmbH
Y1 - 1996
N1 - Konferenz-Einzelbericht: ACTUATOR, Internat. Conf. on New Actuators, 5
SP - 37
EP - 40
CY - Bremen
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Sadeghfam, Arash
T1 - Novel balanced inductor for compact differential systems / Sadeghfam, Arash; Heuermann, Holger
JF - Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association
Y1 - 2004
SN - 1-580-53992-0
N1 - European Microwave Conference ; (34, 2004, Amsterdam) ; European Microwave Week ; (7, 2004, Amsterdam)
SP - 709
EP - 712
PB - Horizon House Publ.
CY - London
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Erkens, Holger
T1 - Blocking structures for mixed-mode systems. / Erkens, Holger ; Heuermann, Holger
JF - Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association. Vol. 1
Y1 - 2004
SN - 1-580-53992-0
N1 - European Microwave Conference ; (34, 2004, Amsterdam) ; European Microwave Week ; (7, 2004, Amsterdam)
SP - 297
EP - 300
PB - Horizon House Publ.
CY - London
ER -
TY - JOUR
A1 - Heuermann, Holger
A1 - Rumiantsev, A.
A1 - Schott, S.
T1 - Advanced on-wafer multiport calibration methods for mono- and mixed-mode device characterization
JF - On wafer characterization : 63rd ARFTG conference digest, spring 2004, 11 June 2004, Fort Worth, TX / Automatic RF Techniques Group. [Conference chair: John Cable. Publication chair: J. G. Burns]
Y1 - 2004
SN - 0-7803-8371-0
N1 - Microwave Theory and Techniques Society. ; Automatic RF Techniques Group ; ARFTG conference ; (63 : ; 2004.06.11 : ; Fort Worth, Tex.)
SP - 91
EP - 96
PB - IEEE Operations Center
CY - Piscataway, NJ
ER -
TY - JOUR
A1 - Heuermann, Holger
T1 - GSOLT: the calibration procedure for all multi-port vector network analyzers
JF - IEEE MTT-S International Microwave Symposium digest : Philadelphia, Pennsylvania, 8 - 13 June 2003 ; [including: 2003 International Microwave Symposium digest, vol. 1-3, RF Integrated Circuit Symposium digest, Automatic RF Techniques Group Symposium digest . Vol. 3
Y1 - 2003
SN - 0-780-37696-X
N1 - Nebent.: 2003 IEEE MTT-S International Microwave Symposium
SP - 1815
EP - 1818
PB - IEEE
CY - Piscataway, NJ
ER -
TY - JOUR
A1 - Samm, Doris
A1 - Faissner, H.
A1 - Frenzel, E.
A1 - Heinrigs, W.
T1 - Limit on axion decay into an electron pair / H. Faissner, E. Frenzel, W. Heinrigs, A. Preussger, D. Samm und U. Samm
JF - Physics Letters B. Vol. 96 (1980), H. Issues 1-2
Y1 - 1980
SP - 201
EP - 205
ER -
TY - JOUR
A1 - Samm, Doris
A1 - Faissner, H.
A1 - Frenzel, E.
A1 - Heinrigs, W.
T1 - Observation of the two-photon decay of a light penetrating particle / H. Faissner, E. Frenzel, W. Heinrigs, A. Preussger, D. Samm und U. Samm
JF - Physics Letters B. Vol. 103 (1980), H. Issues 3
Y1 - 1980
SP - 234
EP - 240
ER -
TY - BOOK
A1 - Samm, Doris
A1 - Faissner, H.
A1 - Henrigs, W.
A1 - Preussger, A.
T1 - Further evidence for the radiative decay of a light, penetrating particle / Faissner, H. ; Heinrigs, W. ; Preussger, A. ; Samm, D.
Y1 - 1982
N1 - Also published in INIS-mf--9311
PB - Technische Hochschule
CY - Aachen
ER -
TY - JOUR
A1 - Samm, Doris
A1 - Faissner, H.
A1 - Heinrigs, W.
A1 - Preussger, A.
T1 - Search for the two-photon decay of a light penetrating particle from a 590 MeV proton beam dump / Faissner, H.; Heinrigs, W.; Preussger, A.; Reitz, J.; Samm, D. [u.a.]
JF - Zeitschrift für Physik, C Particles and Fields. 44 (1989), H. 4
Y1 - 1989
SP - 557
EP - 566
ER -
TY - JOUR
A1 - Kämper, Klaus-Peter
A1 - Picard, Antoni
A1 - Brill, Manfred
A1 - Cassel, Detlef (u.a.)
T1 - The Virtual Cleanroom – a new tool in teaching MST process technologies
JF - mst news International newsletter on micro - nano Integration (2003)
Y1 - 2003
SN - 0948-3128
SP - 35
EP - 36
ER -
TY - JOUR
A1 - Samm, Doris
A1 - Bosetti, P.-C.
T1 - Testmessungen an einem grossflaechigen (Durchmesser 35 cm) Photomultiplier Test measurements of a large-area (diameter 35 cm) photomultiplier / Bosetti, P.-C.; ... Samm, D. [u.a.]
JF - Verhandlungen der Deutschen Physikalischen Gesellschaft. 25 (1990), H. 1
Y1 - 1990
N1 - Fruehjahrstagung des Fachausschusses Teilchenphysik der Deutschen Physikalischen Gesellschaft e.V. (DPG), Hamburg (Germany), 21-24 Mar 1990
SP - 33
EP - 33
ER -
TY - JOUR
A1 - Samm, Doris
A1 - Bosetti, P.-C.
T1 - DUMAND und die Suche nach extraterrestrischen Neutrinos / DUMAND and the search for extraterrestrial neutrinos / Bosetti, P.-C.; ... Samm, D. [u.a.]
JF - Verhandlungen der Deutschen Physikalischen Gesellschaft. 25 (1990), H. 1
Y1 - 1990
N1 - Fruehjahrstagung des Fachausschusses Teilchenphysik der Deutschen Physikalischen Gesellschaft e.V. (DPG), Hamburg (Germany), 21-24 Mar 1990
SP - 88
EP - 88
ER -
TY - JOUR
A1 - Samm, Doris
A1 - Faissner, H.
A1 - Göttlicher, P.
A1 - Matela, H.
T1 - Search for scalar and pseudoscalar bosons emitted in nuclear decays via their interactions / Faissner, H.; Goettlicher, P. ; Matela, H. ; Samm, D.
JF - Zeitschrift für Physik A Hadrons and Nuclei. 341 (1992), H. 3
Y1 - 1992
SP - 359
EP - 364
ER -
TY - JOUR
A1 - Samm, Doris
A1 - Faissner, H.
A1 - Moers, T.
A1 - Priem, R.
T1 - Modular wall-less drift chamber for muon detection at the LHC / H. Faissner, Th. Moers, R. Priem, ... , D. Samm [u.a.]
JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 330 (1993), H. 1-2
Y1 - 1993
SP - 76
EP - 82
ER -
TY - JOUR
A1 - Samm, Doris
T1 - DUMAND and the search for high energy neutrino point sources / Samm, Doris [u.a.]
JF - Trends in astroparticle physics / ed. by Peter Christian Bosetti
Y1 - 1994
SN - 3-8154-3017-8
N1 - (Teubner-Texte zur Physik; Bd. 28); International Conference on Trends in Astroparticle-Physics ; (2 : ;
SP - 9
EP - 20
PB - Teubner
CY - Stuttgart
ER -
TY - JOUR
A1 - Heuermann, Holger
T1 - A Synthesis Technique for Mono- and Mixed-Mode Symmetrical Filter
JF - Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association . Vol. 1
Y1 - 2004
SN - 1-580-53992-0
N1 - European Microwave Conference ; (34, 2004, Amsterdam) ; European Microwave Week ; (7, 2004, Amsterdam)
SP - 309
EP - 312
PB - Horizon House Publ
CY - London
ER -
TY - JOUR
A1 - Fredebeul-Krein, Markus
T1 - The case for a more binding WTO agreement on regulatory principles in telecommunication markets
JF - Telecommunications policy. vol. 23 (1999), H. afl. 9
Y1 - 1999
SN - 0308-5961
SP - 625
EP - 644
ER -
TY - JOUR
A1 - Fredebeul-Krein, Markus
T1 - Telecommunications and WTO discipline : an assessment of the WTO agreement on telecommunication services
JF - Telecommunications policy. 21 (1997), H. 6
Y1 - 1997
SN - 0308-5961
SP - 477
EP - 491
ER -
TY - CHAP
A1 - Staat, Manfred
A1 - Heitzer, Michael
T1 - Limit and shakedown analysis for plastic design
N2 - Limit and shakedown theorems are exact theories of classical plasticity for the direct computation of safety factors or of the load carrying capacity under constant and varying loads. Simple versions of limit and shakedown analysis are the basis of all design codes for pressure vessels and pipings. Using Finite Element Methods more realistic modeling can be used for a more rational design. The methods can be extended to yield optimum plastic design. In this paper we present a first implementation in FE of limit and shakedown analyses for perfectly plastic material. Limit and shakedown analyses are done of a pipe–junction and a interaction diagram is calculated. The results are in good correspondence with the analytic solution we give in the appendix.
KW - Einspielen
KW - Traglast
KW - Finite-Elemente-Methode
KW - Traglastanalyse
KW - Einspielanalyse
KW - FEM
KW - limit analysis
KW - shakedown analysis
Y1 - 1997
ER -
TY - CHAP
A1 - Staat, Manfred
A1 - Tran, Thanh Ngoc
A1 - Pham, Phu Tinh
T1 - Limit and shakedown reliability analysis by nonlinear programming
N2 - 7th International Conference on Reliability of Materials and Structures (RELMAS 2008). June 17 - 20, 2008 ; Saint Petersburg, Russia. pp 354-358. Reprint with corrections in red Introduction Analysis of advanced structures working under extreme heavy loading such as nuclear power plants and piping system should take into account the randomness of loading, geometrical and material parameters. The existing reliability are restricted mostly to the elastic working regime, e.g. allowable local stresses. Development of the limit and shakedown reliability-based analysis and design methods, exploiting potential of the shakedown working regime, is highly needed. In this paper the application of a new algorithm of probabilistic limit and shakedown analysis for shell structures is presented, in which the loading and strength of the material as well as the thickness of the shell are considered as random variables. The reliability analysis problems may be efficiently solved by using a system combining the available FE codes, a deterministic limit and shakedown analysis, and the First and Second Order Reliability Methods (FORM/SORM). Non-linear sensitivity analyses are obtained directly from the solution of the deterministic problem without extra computational costs.
KW - Finite-Elemente-Methode
KW - Limit analysis
KW - Shakedown analysis
Y1 - 2008
ER -
TY - CHAP
A1 - Kern, Alexander
A1 - Krichel, Frank
A1 - Müller, Klaus-Peter
T1 - Lightning protection design of a renewable energy hybrid-system without power mains connection
N2 - In the year 2000 a direct lightning strike to the hybridsystem without power mains connection VATALI on the Greek island Crete results in the destruction and damage of some mechanical and electrical components. The hybrid-system VATALI was not lightning protected at that time. The hardware damage costs are approx. 60,000 €. The exposed site of the hybrid-system on top of a mountain was and still is the reason for a high risk of lightning strikes. Also in the future further lightning strikes have to be taken into consideration. In the paper a fundamental lightning protection design concept for renewable energy hybrid-systems without power mains connection and protection measures against direct strikes and overvoltages are shown in detail. The design concept was realized exemplarily for the hybrid-system VATALI. The hardware costs for the protection measures were about 15,000 €. About 50% of the costs are due to protection measures against direct strikes, 50% are due to overvoltage protection. Future extensions, new installations, or modifications have to be included into the lightning protection design concept of the hybrid-system.
KW - Blitzschutz
KW - Erneuerbare Energien
KW - Hybridsystem
KW - Lightning protection
KW - Renewable energy
KW - hybrid-system
Y1 - 2001
ER -
TY - CHAP
A1 - Zischank, Wolfgang J.
A1 - Kern, Alexander
A1 - Frentzel, Ralf
A1 - Heidler, Fridolin
A1 - Seevers, M.
T1 - Assessment of the lightning transient coupling to control cables interconnecting structures in large industrial facilities and power plants
N2 - Large industrial facilities and power plants often require a huge number fo information and control cables between the differnet structures. These I&C-cables can be routed in reinforced concrete cable ducts or in isolated buried cable runs. KTA 2206 is the German lightning protection standard for nuclear power plants. During the last several years considerable effort has been made to revise this standard. Despite the well established principles and design guidelines for the construction of the lightning protection system, this standard puts special emphasis on the coupling of transient overvoltages to I&C-cables.
KW - Blitzschutz
KW - Elektromagnetische Kopplung
KW - Überspannung
KW - Kraftwerke
KW - Industrieanlagen
KW - Lightning
KW - current distribution
KW - electromagnetic coupling
KW - overvoltages
Y1 - 2000
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
T1 - Time for revision: The regulation of Germany's next generation networks in the light of new economic and technological challenges on telecom markets : Presentation for the 18th Biennial conference of the International Telecommunications Society, June 24–27, 2008 Montreal, Canada
N2 - On 1st January 1998, the German telecom market was fully liberalised. Since then genuine competition between market participants has developed, based on a comprehensive legal and regulatory framework that provides for safeguards against unfair competition and market power by Deutsche Telekom. Today, about 10 years after the liberalisation of the telecommunications sector a revision of this regulatory approach has become necessary because at least on three dimensions the situation is quite different from the one 10 years ago: First, with numerous established alternative operators in the market monopolies have been successfully challenged and competition introduced. Second, not only is Cable TV becoming in large parts of Germany a viable alternative for the provision of broadband services but also mobile services are becoming increasingly a substitute for fixed services. Last but not least there are important technological changes under way, requiring huge investments in infrastructure upgrades for next generation networks. In the light of these new developments the question is to which extent the current regulatory approach of severe ex-ante regulatory intervention is still appropriate. Is any part of the network of the former incumbent still a bottleneck? A more light handed regulatory approach might be the right response to this new situation. The paper is organised as follows: The first section will briefly examine the economic rationale for regulating network access. Based on the assumption that regulation is always necessary when bottlenecks exist regulatory principles for an efficient network access regime will be derived. The second section compares the situation of the German market in early 1998 with the one of today. Thereby three dimensions will be considered: the degree of competition, the potential for substitution and technological developments. The third section will define some requirements for the future regulation of telecom markets. Proposals will be elaborated how to ensure competitive telecom markets in the light of new economic and technological challenges.
KW - Telekommunikationsmarkt
KW - Telekommunikationsmarkt
Y1 - 2008
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
A1 - Haunert, Martina
T1 - Assessing the effectiveness of price cap regimes for the regulation of fixed telephony markets: has it been successful in achieving competition? : preliminary draft / by Markus Fredebeul-Krein and Martina Haunert. 19th European Regional ITS Conference of the International Telecommunications Society, September 17–19, 2008 Rome, Italy
N2 - 1. Introduction 2. Tariff regulation, rebalancing and price caps 3. Price cap regimes in selected European countries 4. Has price cap regulation been successful? 5. Regulatory implications for other countries
KW - Telekommunikationsmarkt
KW - Telekommunikationsmarkt
Y1 - 2008
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
T1 - Developing competitive broadband markets: Lessons learnt from German and European regulatory approaches on broad-band access
N2 - A key feature of future broadband markets will be diversity of access technologies, meaning that numerous technologies will be exploited for broadband communication. Various factors will affect the success of these future broadband markets, the regulatory policy being one amongst others. So far, a coherent regulatory approach does not exist as to broadband markets. First results of policies so far suggest that less sector-specific regulation is likely to occur. Instead, regulators must ensure that access to networks and services of potentially dominant providers in a relevant broadband market will satisfy requirements for openness and non-discrimination. In this environment the future challenge of regulationg broadband markets will be to set the right incentives for investment into new infrastructures. This paper examines whether there is a need for the regulation of future broadband access markets an if yes, what is the appropriate regulatory tool to do so. Thereby the focus is on the analysis of European broadband markets and the regulatory approaches applied. The first section provides a description of the characteristics of future broadband markets. The second section discusses possible bottlenecks on broadband markets an their regulatory implications. The third section will examine regulatory issues concerning access to broadband networks in more detail. This will be done by comparing the regulatory approaches of European countries and the results in terms of bradband penetration. The final section will give key recommendations for a regulatory strategy on brandband access markets.
KW - Telekommunikationsmarkt
KW - Telekommunikationsmarkt
Y1 - 2006
N1 - paper presented at 16th Biennial conference of the International Telecommunications Society. Information Communication Technology: Opportunities and Challenges for Telecommunications. June 12-16, 2006 Beijing, China.
ER -
TY - CHAP
A1 - Staat, Manfred
A1 - Ballmann, J.
T1 - Fundamental aspects of numerical methods for the propagation of multi-dimensional nonlinear waves in solids
T2 - Nonlinear hyperbolic equations : theory, computations methods, and applications ; proceedings of the 2nd International Conference on Nonlinear Hyperbolic Problems, Aachen
N2 - The nonlinear scalar constitutive equations of gases lead to a change in sound speed from point to point as would be found in linear inhomogeneous (and time dependent) media. The nonlinear tensor constitutive equations of solids introduce the additional local effect of solution dependent anisotropy. The speed of a wave passing through a point changes with propagation direction and its rays are inclined to the front. It is an open question whether the widely used operator splitting techniques achieve a dimensional splitting with physically reasonable results for these multi-dimensional problems. May be this is the main reason why the theoretical and numerical investigations of multi-dimensional wave propagation in nonlinear solids are so far behind gas dynamics. We hope to promote the subject a little by a discussion of some fundamental aspects of the solution of the equations of nonlinear elastodynamics. We use methods of characteristics because they only integrate mathematically exact equations which have a direct physical interpretation.
KW - Nichtlineare Welle
KW - Nichtlineare Gleichung
KW - Festkörper
KW - Elastodynamik
KW - Multi-dimensional wave propagation
KW - nonlinear solids
KW - nonlinear tensor constitutive equation
Y1 - 1989
SP - 574
EP - 588
ER -
TY - CHAP
A1 - Merten, Sabine
A1 - Conrad, Thorsten
A1 - Kämper, Klaus-Peter
A1 - Picard, Antoni
A1 - Schütze, Andreas
T1 - Virtual Technology Labs - an efficient tool for the preparation of hands-on-MEMS-courses in training foundries
N2 - Hands-on-training in high technology areas is usually limited due to the high cost for lab infrastructure and equipment. One specific example is the field of MEMS, where investment and upkeep of clean rooms with microtechnology equipment is either financed by production or R&D projects greatly reducing the availability for education purposes. For efficient hands-on-courses a MEMS training foundry, currently used jointly by six higher education institutions, was established at FH Kaiserslautern. In a typical one week course, students manufacture a micromachined pressure sensor including all lithography, thin film and packaging steps. This compact and yet complete program is only possible because participants learn to use the different complex machines in advance via a Virtual Training Lab (VTL). In this paper we present the concept of the MEMS training foundry and the VTL preparation together with results from a scientific evaluation of the VTL over the last three years.
KW - Virtuelles Laboratorium
KW - Virtuelles Labor
KW - Hand-on-training
KW - Virtual Technology Lab
KW - MEMS ; education and training foundry
Y1 - 2006
ER -
TY - CHAP
A1 - Weßling, Matthias
T1 - Leadership Perspectives: Research Findings, Theories, Practical Experiences
N2 - Leadership Perspectives: Research Findings, Theories, Practical Experiences: Results of Leadership Research and exemplarily application cases show the perspectives and consequences for leadership practice and the following requirements for executives in future.
N2 - Leadership Perspectives: Research Findings, Theories, Practical Experiences: Bisherige Ergebnisse der betriebswirtschaftlichen Führungsforschung und exemplarische Anwendungsbeispiele der Führungspraxis, sowie die Schlußfolgerungen für die Perspektiven der betrieblichen Mitarbeiterführung sowie die sich daraus ergebenden Anforderungen an zukünftige Führungskräfte.
KW - Leadership
KW - Führung
KW - Führungsansätze
KW - Leadership
KW - Self-Leadership
KW - Leadership Approaches
KW - Skill Assessment
KW - Leadership Theories
Y1 - 2007
ER -
TY - CHAP
A1 - Weßling, Matthias
T1 - Motivation and Leadership - The Reiss-Profile of the 16 Basic Desires: Research results and managerial applications
N2 - Recent Results of the scientific Reiss-Profile (16 basic desires) due to the concept of Prof. Dr. Steven Reiss (State University Ohio, U.S.A.), supplemented by the comparative analysis of empirical motivational profiles of european executives of various companies.
N2 - Neuere Forschungsergebnisse des wissenschaftlichen Reiss-Profils der 16 Lebensmotive nach Prof. Dr. Steven Reiss (State University Ohio, U.S.A.) und die Möglichkeiten und Grenzen ihrer Umsetzung in der betrieblichen Führungspraxis unter Integration der vergleichenden Analyse und Interpretation empirisch erhobener Motivprofile einzelner europäischer Führungskräfte.
KW - Motivation
KW - Leadership
KW - Motivation
KW - Führung
KW - Motivation
KW - Leadership
Y1 - 2007
ER -
TY - CHAP
A1 - Weßling, Matthias
T1 - Provocative Communication in Coaching and Leadership: scientific research and managerial applications of the Provocative Communication Style
N2 - Concept, scientific research and managerial applications of Provocative Coaching, according to the „Provocative Therapy“ of Prof. Dr. Frank Farrelly (University of Wisconsin, U.S.A) in terms of an application of the Provocative Communication Style in specific situations of practical leadership, especially in the role of a coach for their subordinates.
N2 - Konzept, Forschungsergebnisse und Tools der sogenannten „Provocative Therapy“ nach Prof. Dr. Frank Farrelly (University of Wisconsin, U.S.A) und ihre Anwendung als provokativer Kommunikationsstil einer Führungskraft in spezifischen Situationen der betrieblichen Führungspraxis in der Rolle eines Coaches.
KW - Kommunikation
KW - Coaching
KW - Führung
KW - Kommunikation
KW - Coaching
KW - Führung
KW - Provokativer Stil
KW - Provocative Coaching
KW - Leadership
KW - Communication
KW - Provocative Style
Y1 - 2007
ER -
TY - GEN
A1 - Kämper, Klaus-Peter
T1 - Lecture notes Sensors and Actuators
N2 - Kennwortgeschützter Zugang nur für Studierende bei Prof. Dr. Klaus-Peter Kämper. Wintersemester 2007/2008. Version vom 30.08.2007. 472 Seiten (pdf-Format)
N2 - Password necessarily. Access only for Students by Prof. Dr. Klaus-Peter Kämper. Winter semester 2007/2008. Version 2007-08-30. 472 pages (pdf) Contents 1. Introduction 2. Introduction to Sensors 3. Introduction to Microfabrication 4. Pressure Sensors 5. Acceleration Sensors 6. Angular Rate Sensors 7. Position Sensors 8. Flow Sensors 9. Piezoelectric Actuators 10. Magnetostrictive Actuators 11. Actuators based on Shape Memory Alloys 12. Actuators based on Electrorheological Fluids 13. Actuators based on Magnetorheological Fluids
KW - Sensor
KW - Aktor
KW - Sensoren
KW - Aktoren
KW - Sensores
KW - Actuators
KW - Microfabrication
Y1 - 2007
ER -
TY - CHAP
A1 - Tran, Thanh Ngoc
A1 - Staat, Manfred
A1 - Kreißig, R.
T1 - Calculation of load carrying capacity of shell structures with elasto-plastic material by direct methods
N2 - Proceedings of the International Conference on Material Theory and Nonlinear Dynamics. MatDyn. Hanoi, Vietnam, Sept. 24-26, 2007, 8 p. In this paper, a method is introduced to determine the limit load of general shells using the finite element method. The method is based on an upper bound limit and shakedown analysis with elastic-perfectly plastic material model. A non-linear constrained optimisation problem is solved by using Newton’s method in conjunction with a penalty method and the Lagrangean dual method. Numerical investigation of a pipe bend subjected to bending moments proves the effectiveness of the algorithm.
KW - Finite-Elemente-Methode
Y1 - 2007
ER -
TY - CHAP
A1 - Fredebeul-Krein, Markus
T1 - 10 years of liberalised telecom markets in Germany: Assessing the degree of competition on the markets for voice telephony
N2 - Market data for the German telecom market shows that Deutsche Telekom as the former incumbent is constantly loosing shares on all arkets for voice telephony: the market for local calls, the market for long-distance calls and the market for international calls. At the same time prices decline steadily with the latest trend being that operators offer voice services free of charge, the costs of which are covered by a monthly subscription charge. Against this background the paper examines the state of policy and regulatory reform in the telecommunications sector in Germany almost 10 years after the liberalisation of the fixed telecommunications market. Thereby the focus is on the analysis of the competitive conditions that have been established on the German market for voice telephony services. If these retail markets are competitive, there might be a need to remove remaining regulatory provisions. In the new environment of converging markets the future challenge of regulating fixed telecom markets might be to ensure that access to the network and/or services of a potentially dominant provider in a relevant market will satisfy requirements for openness and non-discrimination.
KW - Telekommunikationsmarkt
KW - Telekommunikationsmarkt
Y1 - 2007
N1 - paper presented at 18th European Regional ITS Conference of the International Telecommunications Society, September 2-4, 2007 Istanbul, Turkey
ER -
TY - CHAP
A1 - Tran, Thanh Ngoc
A1 - Staat, Manfred
A1 - Kreißig, R.
T1 - Finite element shakedown and limit reliability analysis of thin shells
N2 - A procedure for the evaluation of the failure probability of elastic-plastic thin shell structures is presented. The procedure involves a deterministic limit and shakedown analysis for each probabilistic iteration which is based on the kinematical approach and the use the exact Ilyushin yield surface. Based on a direct definition of the limit state function, the non-linear problems may be efficiently solved by using the First and Second Order Reliabiblity Methods (Form/SORM). This direct approach reduces considerably the necessary knowledge of uncertain technological input data, computing costs and the numerical error. In: Computational plasticity / ed. by Eugenio Onate. Dordrecht: Springer 2007. VII, 265 S. (Computational Methods in Applied Sciences ; 7) (COMPLAS IX. Part 1 . International Center for Numerical Methods in Engineering (CIMNE)). ISBN 978-1-402-06576-7 S. 186-189
KW - Finite-Elemente-Methode
KW - Limit analysis
KW - shakedown analysis
KW - Exact Ilyushin yield surface
KW - Random variable
KW - First Order Reliabiblity Method
Y1 - 2007
ER -
TY - CHAP
A1 - Heitzer, M.
A1 - Staat, Manfred
T1 - Direct FEM approach to design-by-analysis of pressurized components
N2 - Abstracts of the ACHEMA 2000 - International Meeting on Chemical Engineering, Environmental Protection and Biotechnology, May 22 - 27, 2000. Frankfurt am Main. Achema 2000 : special edition / Linde. [Ed.: Linde AG. Red.: Volker R. Leski]. - Wiesbaden : Linde AG, 2000. - 56 p. : Ill., . - pp: 79 - 81
N2 - Abstracts der ACHEMA 2000 - International Meeting on Chemical Engineering, Environmental Protection and Biotechnology, May 22 - 27, 2000. Frankfurt am Main.
KW - Finite-Elemente-Methode
KW - Finite-Elemente-Methode
KW - limit analysis
KW - shakedown analysis
Y1 - 2000
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
KW - FEM
KW - Einspielanalyse
KW - shakedown
KW - limit load
KW - reliability analysis
KW - FEM
KW - direct method
Y1 - 2000
ER -
TY - JOUR
A1 - Vu, Duc-Khoi
A1 - Staat, Manfred
T1 - An algorithm for shakedown analysis of structure with temperature dependent yield stress
N2 - This work is an attempt to answer the question: How to use convex programming in shakedown analysis of structures made of materials with temperature-dependent properties. Based on recently established shakedown theorems and formulations, a dual relationship between upper and lower bounds of the shakedown limit load is found, an algorithmfor shakedown analysis is proposed. While the original problem is neither convex nor concave, the algorithm presented here has the advantage of employing convex programming tools.
KW - Einspielen
KW - Temperaturabhängigkeit
KW - Fließgrenze
KW - Shakedown
KW - shakedown analysis
KW - yield stress
Y1 - 2004
ER -
TY - JOUR
A1 - Kühn, Raoul-Roman
A1 - Haugner, Werner
A1 - Staat, Manfred
A1 - Sponagel, Stefan
T1 - A Two Phase Mixture Model based on Bone Observation
N2 - An optimization method is developed to describe the mechanical behaviour of the human cancellous bone. The method is based on a mixture theory. A careful observation of the behaviour of the bone material leads to the hypothesis that the bone density is controlled by the principal stress trajectories (Wolff’s law). The basic idea of the developed method is the coupling of a scalar value via an eigenvalue problem to the principal stress trajectories. On the one hand this theory will permit a prediction of the reaction of the biological bone structure after the implantation of a prosthesis, on the other hand it may be useful in engineering optimization problems. An analytical example shows its efficiency.
KW - Knochen
KW - Knochenbildung
KW - Knochenchirugie
KW - Strukturanalyse
KW - Schwammknochen
KW - Knochendichte
KW - Wolffsches Gesetz
KW - bone structure
KW - bone density
KW - Wolff's Law
KW - cancellous bone
Y1 - 2004
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 - CHAP
A1 - Brüssermann, Klaus
A1 - Deuster, M.
T1 - Temperature measurement to optimise the burning process
N2 - One of the most important parameters in a burning chamber - in power stations, in waste to energy plants - is the temperature. This temperature is in the range of 700-1500 °C - one of the most advanced measuring methods being the acoustic pyrometry with the possibility of producing temperature mapping in one level of the burning chamber - comparable to computer tomography. The results of these measurements discussed in the presentation can be used - to fulfil the legal requirements in the FRG or in the EU - to equalise the temperature in one level of the burning chamber to optimise the steam production (better efficiency of the plant) and to minimise the production of temperature controlled flue gas components (NO, CO a. o.) - to control the SNCR-process if used.
KW - Pyrometrie
KW - Temperaturmessung
KW - temperature measurement
KW - acoustic pyrometry
KW - steam production
KW - flue gas components
Y1 - 2005
ER -
TY - CHAP
A1 - Gebhardt, Andreas
T1 - Technology Diffusion through a Multi-Level Technology Transfer Infrastructure. Contribution to the 1st. All Africa Technology Diffusion Conference Boksburg, South Africa June 12th - 14th 2006
N2 - Table of contents 1. Introduction 2. Multi-level Technology Transfer Infrastructure 2.1 Level 1: University Education – Encourage the Idea of becoming an Entrepreneur 2.2 Level 2: Post Graduate Education – Improve your skills and focus it on a product family. 2.3 Level 3: Birth of a Company – Focus your skills on a product and a market segment. 2.4 Level 4: Ready to stand alone – Set up your own business 2.5 Level 5: Grow to be Strong – Develop your business 2.6 Level 6: Competitive and independent – Stay innovative. 3. Samples 3.1 Sample 1: Laser Processing and Consulting Centre, LBBZ 3.2 Sample 2: Prototyping Centre, CP 4. Funding - Waste money or even lost Money? 5. Conclusion
KW - Technologietransfer
KW - technology transfer
KW - technology diffusion
Y1 - 2006
ER -
TY - JOUR
A1 - Gebhardt, Andreas
T1 - Generative Manufacturing of Ceramic Parts "Vision Rapid Prototyping"
N2 - Table of Contents Introduction 1. Generative Manufacturing Processes 2. Classification of Generative Manufacturing Processes 3. Application of Generative Processes on the Fabrication of Ceramic Parts 3.1 Extrusion 3.2 3D-Printing 3.3 Sintering – Laser Sintering 3.4 Layer-Laminate Processes 3.5 Stereolithography (sometimes written: Stereo Lithography) 4. Layer Milling 5. Conclusion - Vision
KW - Rapid prototyping
KW - Rapid Technologie
KW - Rapid Prototyping
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 - GEN
A1 - Staat, Manfred
A1 - Barry, Steve
T1 - Continuum Mechanics with an Introduction to the Finite Element Method / Steve Barry; Manfred Staat. With extensions by Manfred Staat.
N2 - Contents: 1 Introduction 2 One Dimensional Continuum Mechanics 3 Tensors 4 Three Dimensional Stress and Strain 5 Conservation Laws 6 Contiunuum Modelling 7 Plain Problems 8 Questions 9 Reference Information
KW - Technische Mechanik
KW - Finite-Elemente-Methode
Y1 - 2006
ER -
TY - RPRT
A1 - Weßling, Matthias
T1 - How to deal with foreign cultures: an cross-cultural training-approach based on the didactical methodology of 'experiential learning' following Kolb & Fry
N2 - Many companies still conduct the worldwide management of people as if neither the external economic nor the internal structure of the firm had changed. The costs of cross-cultural failure, for individuals and their companies, are enormous: personal and family costs; financial, professional and emotional costs; costs to one’s career prospects, to one’s self-esteem, to one’s marriage and family. This scenario describes sufficiently the reason for learning “the art of crossing cultures” (Craig Storti). To this end, this research paper describes an innovative approach of cross-cultural training, following the didactical ideas of Kolb and Fry, the so-called 'experiential learning'.
N2 - Viele international agierende Unternehmen verfahren mit dem weltweiten Personalmanagement so, als wenn sich weder der ökonomische Kontext noch die internen Strukturen der Firmen geändert hätten. Die Kosten von interkulturellen Mißverständnissen und Fehlschlägen sind enorm - sowohl für alle beteiligten Personen, als auch für die betroffenen Unternehmen: hier geht es um berufliche, emotionale, soziale Kosten bis hin zu Beeinträchtigungen der Selbstwertschätzung oder auch der ehelichen Paarbeziehungen. Dieses Szenario beschreibt die Notwendigkeit, sich intensive auseinanderzusetzen mit dem, was Craig Storti "the art of crossing cultures" nennt. Vor diesem Hintergrund beschreibt das vorliegende Forschungspapier einen innovativen Ansatz für ein interkulturelles Managementtraining auf der methodischen Basis der didaktischen Idee des 'experiential learning' nach Kolb und Fry.
KW - Interkulturelles Lernen
KW - Kulturvergleich
KW - Interkulturelles Management
KW - Erfahrungsorientiertes Lernen
KW - Völkerpsychologie
KW - Interkulturelles Training
KW - Managementtraining
KW - Erfahrungslernen
KW - Interkulturelles Lernen
KW - Kulturvergleichende Psychologie
KW - Cross-Cultural Training
KW - Intercultural Awareness
KW - Experiential Learning
KW - Managementtraining
KW - Cross-Cultural Psychology
Y1 - 2009
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 - Kämper, Klaus-Peter
A1 - Picard, Antoni
A1 - Brill, Manfred
A1 - Cassel, Detlev
A1 - Jentsch, Andreas
A1 - Merten, Sabine
A1 - Rollwa, Markus
T1 - The Virtual Clean Room - a new tool in teaching MST process technologies
N2 - The Virtual Clean Room - a new tool in teaching MST process technologies University education in high-technology fields like MST is not complete without intensive laboratory sessions. Students cannot fully grasp the complexity and the special problems related to the manufacturing of microsystems without a thorough hands-on experience in a MST clean room.
KW - Virtuelle Maschine
KW - VM
KW - Mikrosystemtechnik
KW - MST
KW - virtual clean room
Y1 - 2003
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
KW - Materialermüdung
KW - shakedown analyses
KW - thermal ratcheting
KW - fatigue analyses
Y1 - 2001
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 -