TY - JOUR
A1 - Thielemann, Frank
A1 - Lang, Franz Peter
T1 - Wissensmanagement und neue Informationstechnologie . Lang, Franz Peter; Thielemann, Frank
JF - Veränderungsmanagement in der Sozialwirtschaft / Bernd Maelicke (Hrsg.)
Y1 - 2000
SN - 3-7890-6738-5
N1 - Inhaltsverzeichnis
SP - 132
EP - 172
PB - Nomos-Verl.-Ges.
CY - Baden-Baden
ER -
TY - BOOK
A1 - Thielemann, Frank
T1 - Kompetenzentwicklung im Mittelstand - das Beispiel Kompetenz-Entwicklungs-Center / hrsg. von Frank Thielemann
Y1 - 2000
SN - 3-89275-031-9
N1 - Wirtschaftswissenschaftliche Studien ; 20
PB - MA, Akademie-Verl.- und Druck-Ges.
CY - Essen
ER -
TY - JOUR
A1 - Thielemann, Frank
A1 - Chalupsky, J.
T1 - Der Markt verlangt nach Kooperationen
JF - Leipziger Wirtschaft. 5 (1994), H. 6
Y1 - 1994
SP - 14
EP - 18
ER -
TY - JOUR
A1 - Thielemann, Frank
A1 - Lüdtke, C.
T1 - Balanced Scorecard - Von der Vision zur Strategie
JF - Wirtschafts-Nachrichten. 46 (2001), H. 9
Y1 - 2001
SN - 1436-5588
SP - 10
EP - f.
ER -
TY - JOUR
A1 - Thielemann, Frank
A1 - Lüdtke, C.
T1 - Einfluß des KonTraG im Unternehmensbereich
JF - Wirtschafts-Nachrichten. 45 (2000), H. 8
Y1 - 2000
SN - 1436-5588
SP - 10
EP - f.
ER -
TY - JOUR
A1 - Thielemann, Frank
A1 - Lüdtke, C.
T1 - Risikomanagement - Aufbau eines Frühwarnsystems
JF - Wirtschafts-Nachrichten. 45 (2000), H. 12
Y1 - 2000
SN - 1436-5588
SP - 14
EP - ff
ER -
TY - JOUR
A1 - Thielemann, Frank
A1 - Lüdtke, C.
T1 - Wie sich Logistikunternehmen ihren Platz sichern können
JF - Deutsche Verkehrs-Zeitung (DVZ) (1999)
Y1 - 1999
SN - 0342-166X
SP - 42
EP - 42
ER -
TY - JOUR
A1 - Thielemann, Frank
A1 - Schaffner, M.
T1 - Vom Einzelkämpfertum zum kooperativen Kundenservice
JF - Polygraph. 49 (1996), H. 23-24
Y1 - 1996
SN - 0032-3842
SP - 40
EP - 42
ER -
TY - BOOK
A1 - Hardt, Arno
A1 - Schiffer, Willi
T1 - Vermessung der statischen Eigenschaften eines dreidimensionalen Koordinatenmeßtisches / von W. Schiffer ; A. Hardt. [KFA, Kernforschungsanlage Jülich GmbH, Projekt Spallations-Neutronenquelle]
Y1 - 1985
N1 - Spezielle Berichte der Kernforschungsanlage Jülich ; 319
PB - Zentralbibliothek d. Kernforschungsanlage
CY - Jülich
ER -
TY - BOOK
A1 - Hardt, Arno
T1 - Das Transportsystem BANDIT zur Messung von Halbwertszeiten kurzlebiger, neutronenarmer Isotope
Y1 - 1974
N1 - Bonn, Univ., Math.-Naturwiss. Fak., Diss.
PB - Univ.
CY - Bonn
ER -
TY - BOOK
A1 - Hardt, Arno
T1 - Vermessung der dynamischen Eigenschaften eines dreiachsigen Koordinatenmesstisches
Y1 - 1985
N1 - Spezielle Berichte der Forschungsanlage Jülich; 318
PB - Kernforschungsanlage Jülich
CY - Jülich
ER -
TY - BOOK
A1 - Hardt, Arno
A1 - Müller, Gerhard
A1 - Berg, G. P.
A1 - Kelleter, H.-J.
T1 - Aufbau eines Plastikszintillationszählers für den Magnetspektrographen "BIG KARL" am Jülicher Zyklotron "JULIC". Müller, Gerhard; Berg , G. P.; Hardt, A.; Kelleter, H.-J.; Martin, S.-A.; Meissburger, J.
Y1 - 1980
N1 - Spezielle Berichte der Kernforschungsanlage Jülich ; Nr. 0084
PB - Kernforschungsanlage Jülich
CY - Jülich
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Bertuccio, G.
A1 - Pullia, A.
T1 - Pixel X-ray detectors in epitaxial gallium arsenide withhigh-energy resolution capabilities (Fano factor experimentaldetermination) / G. Bertuccio ; A. Pullia ; J. Lauter ; A. Förster ...
JF - IEEE transactions on nuclear science. 44 (1997), H. 1
Y1 - 1997
SN - 0018-9499
SP - 1
EP - 5
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Morvic, M.
A1 - Betko, J.
T1 - On the hopping and band conductivity in molecular-beam epitaxial low-temperature grown GaAs / M. Morvic ; J. Betko ; J. Novák ... A. Förster
JF - Physica status solidi / B, Basic research. 205 (1998), H. 1
Y1 - 1998
SN - 1521-3951
SP - 125
EP - 128
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Brugger, H.
A1 - Meiners, U.
T1 - High quality GaAs-based resonant tunneling diodes for high frequency device applications / H. Brugger ; U. Meiners ; C. Wölk ... A. Förster ...
JF - Proceedings : August 5 - 7, 1991, Cornell University, Ithaca, New York / R. J. Trew, General Chairman
Y1 - 1991
SN - 0-7803-0491-8
N1 - Cornell Conference on Advanced Concepts in High Speed Semiconductor Devices and Circuits <1991, Ithaca, NY>
SP - 39
EP - ff.
PB - Inst. of Electrical and Electronics Engineers
CY - Piscataway, NJ
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Dubecky, F..
A1 - Darmo, J.
T1 - Investigation of deep-level states in bulk and low temperature MBE semiinsulating GaAs by admittance transient spectroscopy / F. Dubecky ; J. Darmo ; M. Darviras ; A. Förster ...
JF - Semi-insulating III-V materials, Ixtapa, Mexico 1992 : proceedings of the 7th Conference on Semi-insulating III-V Materials, Ixtapa, Mexico, 21 - 24 April 1992 / ed. by C. J. Miner ...
Y1 - 1994
SN - 0-7503-0242-9
N1 - Conference on Semi-Insulating III-V Materials <7, 1992, Ixtapa>
SP - 265
EP - 272
PB - Inst. of Physics Publ.
CY - Bristol [u.a.]
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Dieker, C.
A1 - Gerthsen, D.
T1 - Microstructure of the AlAs/GaAs and AlAs/InGaAs resonant tunneling diodes and its correlation with the electrical properties / C. Dieker ; D. Gerthsen ; A. Förster ...
JF - Microscopy of semiconducting materials 1993 : proceedings of the Royal Microscopical Society Conference held at Oxford University, 5 - 8 April 1993 / ed. by A. G. Cullis ... - (Conference series / Institute of Physics ; 134)
Y1 - 1993
SN - 0-7503-0290-9
N1 - Royal Microscopical Society Conference on Microscopy of Semiconducting Materials <8, 1993, Oxford> ; MSM <8, 1993, Oxford>
SP - 253
EP - ff.
PB - Institute of Physics
CY - Bristol [u.a.]
ER -
TY - JOUR
A1 - Walther, T.
A1 - Gerthsen, D.
A1 - Carius, Reinhard
A1 - Förster, Arnold
T1 - AlAs/GaAs Quantum well structures: Interface properties investigated by high-resolution transmission electron microscopy and photoluminescence spectroscopy / T. Walther ; D. Gerthsen ; R. Carius ; A. Förster ...
JF - Microscopy of semiconducting materials 1993 : proceedings of the Royal Microscopical Society Conference held at Oxford University, 5 - 8 April 1993 / ed. by A. G. Cullis ... - (Conference series / Institute of Physics ; 134)
Y1 - 1993
SN - 0-7503-0290-9
N1 - Royal Microscopical Society Conference on Microscopy of Semiconducting Materials <8, 1993, Oxford> ; MSM <8, 1993, Oxford>
SP - 449
EP - ff.
PB - Institute of Physics
CY - Bristol [u.a.]
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Kordos, P.
A1 - Betko, J.
T1 - Electrical and structural characterization of MBE GaAs grown at temperatures between 200 and 600 °C / P. Kordos ; J. Betko; A. Förster ...
JF - Compound semiconductors, 1994 : proceedings of the twenty-first International Symposium on Compound Semiconductors held in San Diego, California, 18 - 22 September, 1994 / ed. by Herb Goronkin ... - (Conference series / Institute of Physics ; 141)
Y1 - 1995
SN - 0-7503-0226-7
N1 - International Symposium on Compound Semiconductors <21, 1994, San Diego, Calif.> ; Institute of Physics
SP - 295
EP - ff.
PB - Institute of Physics
CY - Bristol [u.a.]
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Hardtdegen, Hilde
A1 - Ungermanns, C.
T1 - Comparative investigation of electrical and optical characteristics of AlxGa1-xAs/GaAs structures deposited by LP-MOVPE and MBE / H. Hardtdegen ; M. Hollfelder ; C. Ungermanns ... A. Förster ...
JF - Compound semiconductors, 1994 : proceedings of the twenty-first International Symposium on Compound Semiconductors held in San Diego, California, 18 - 22 September, 1994 / ed. by Herb Goronkin ... - (Conference series / Institute of Physics ; 141)
Y1 - 1995
SN - 0-7503-0226-7
N1 - International Symposium on Compound Semiconductors <21, 1994, San Diego, Calif.> ; Institute of Physics
SP - 81
EP - ff.
PB - Institute of Physics
CY - Bristol [u.a.]
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Tillmann, K.
A1 - Gerthsen, D.
T1 - Morphological transformations of MBE-grown In0.6Ga0.4As island on GaAs(001) substrates / K. Tillmann ; D. Gerthsen ; P. Pfundstein ; A. Förster ...
JF - Microscopy of semiconducting materials 1995 : proceedings of the Institute of Physics Conference held at Oxford University, 20 - 23 March 1995 / Ed. by A G Cullis ... - (Conference series / Institute of Physics ; 146)
Y1 - 1995
SN - 0-7503-0347-6
N1 - MSM <9, 1995, Oxford> ; Institut of Physics
SP - 195
EP - ff.
PB - Institute of Physics
CY - Bristol [u.a.]
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Lauter, J.
A1 - Lüth, H.
T1 - AlGaAs/GaAs avalanche detector array -1 GBit/s X-ray receiver for timing measurements / J. Lauter ; A. Förster ; H. Lüth ...
JF - 1995 IEEE conference record : October 21 - 28, 1995, San Francisco / Patricia A. Moonier, guest ed. - Vol. 1
Y1 - 1996
SN - 0-7803-3180-X
N1 - Nuclear Science Symposium <1995, San Francisco, Calif.> ; Medical Imaging Conference <1995, San Francisco, Calif.> ; IEEE catalog number: 95CH35898
SP - 579
EP - ff.
PB - IEEE Service Center
CY - Piscataway, NJ
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Lentzen, M.
A1 - Gerthsen, D.
T1 - Strain relaxation of lattice-mismatched In0.2Ga0.8As/GaAs superlattices on GaAs(001) substrates / M. Lentzen ; D. Gerthsen ; A. Förster ...
JF - Microscopy of semiconducting materials 1995 : proceedings of the Institute of Physics Conference held at Oxford University, 20 - 23 March 1995 / Ed. by A G Cullis ... - (Conference series / Institute of Physics ; 146)
Y1 - 1995
SN - 0-7503-0347-6
N1 - MSM <9, 1995, Oxford> ; Institut of Physics
SP - 357
EP - ff.
PB - Institute of Physics
CY - Bristol [u.a.]
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Rose, D.
A1 - Pietsch, U.
A1 - Metzger, T. H.
T1 - Depth resolved investigations of the relaxation behaviour in strained GaInAs/GaAs superlattices using grazing incidence X-ray diffraction / Rose, D. ; Pietsch, U. ; Förster, A. ; Metzger, T. H.
JF - Nuclear instruments and methods in physics research / Section B, Beam interactions with materials and atoms. 97 (1995), H. 1-4
Y1 - 1995
SN - 0168-583X
SP - 333
EP - 336
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Rosenauer, A.
A1 - Remmele, T.
T1 - Strain determination in mismatched semiconductor heterostructures by the digital analysis of lattice images / A. Rosenauer ; T. Remmele ; U. Fischer ; A. Förster ...
JF - Microscopy of semiconducting materials 1997 : proceedings of the Royal Microscopical Society Conference held at Oxford University, 7 - 10 April 1997 / ed. by A. G. Cullis ... - (Conference series / Institute of Physics ; 157)
Y1 - 1997
SN - 0-7503-0464-2
N1 - MSM <10, 1997, Oxford> ; Conference on Microscopy of Semiconducting Materials <10, 1997, Oxford> ; Institut of Physics
SP - 39
EP - ff.
PB - Institute of Physics
CY - Bristol [u.a.]
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Schmidt, T.
A1 - Haug, R. J.
T1 - Imaging the local density of states in a disordered semiconductor / T. Schmidt ; R. J. Haug ; V. I. Fal'ko ... A. Förster ...
JF - 23rd International Conference on the Physics of Semiconductors : Berlin, Germany, July 21 - 26, 1996 / ed.: Matthias Scheffler ... - Vol. 3
Y1 - 1996
SN - 981-02-2947-X
N1 - International Conference on the Physics of Semiconductors <23, 1996, Berlin>
SP - 2251
EP - ff.
PB - World Scientific
CY - Singapore [u.a.]
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Kordos, P.
A1 - Ruders, F.
T1 - Properties of LT MBE GaAs for photomixing up to THz frequencies / P. Kordos ; F. Ruders ; M. Marso ; A. Förster
JF - Proceedings : 8 - 11 December 1996, Australian National University, Canberra, Australia / ed.: C. Jagadish
Y1 - 1997
SN - 0-7803-3374-8
N1 - Conference on Optoelectronic and Microelectronic Materials and Devices <1996, Canberra> ; IEEE catalog number: 96TH8197
SP - 71
EP - ff.
PB - IEEE Service Center
CY - Piscataway, NJ
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Hu, Quing
A1 - Verghese, S.
T1 - High-frequency (f ~ 1 THz) studies of quantum-effect devices / Qing Hu ; S. Verghese ; R. A. Wyss ... A. Förster
JF - Semiconductor science and technology. 11 (1996), H. 12
Y1 - 1996
SN - 1361-6641
SP - 1888
EP - 1894
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Schmidt, T.
A1 - Haug, R. J.
T1 - Spectroscopy of local density of states fluctuations in a disordered conductor / T. Schmidt ; R. J. Haug ; V. I. Fal'ko ... A. Förster ...
JF - Europhysics letters. 36 (1996), H. 1
Y1 - 1996
SN - 1286-4854
SP - 61
EP - 66
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Tillmann, K.
A1 - Thust, M.
T1 - Determination of segregation, elastic strain and thin-foil relaxation in InxGa-1-x As islands on GaAs(001) by high resolution transmission electron microscopy / K. Tillmann ; A. Thust ; M. Lentzen ... A. Förster ...
JF - Philosophical magazine / Letters. 74 (1996), H. 5
Y1 - 1996
SN - 1362-3036
SP - 309
EP - 315
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Lauter, J.
A1 - Lüth, H.
T1 - AlGaAs/GaAs avalanche detector array-1 GBit/s X-ray receiver fortiming measurements / J. Lauter ; A. Förster ; H. Lüth ...
JF - IEEE Transactions on Nuclear Science (T-NS). 43 (1996), H. 3, Part 2
Y1 - 1996
SN - 0018-9499
SP - 1446
EP - 1451
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Lachenmann, S. G.
A1 - Kastalsky, A.
T1 - Novel hybrid Nb/InAs/Nb step junctions / S. G. Lachenmann ; A. Kastalsky ; I. Friedrich ; A. Förster ...
JF - Czechoslovak journal of physics . 46 (1996), H. S2
Y1 - 1996
SN - 0011-4626
SP - 659
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Schmidt, T.
A1 - Haug, R. J.
T1 - Spectroscopy of the single-particle states of a quantum-dot molecule / T. Schmidt ; R. J. Haug ; K. v. Klitzing ; A. Förster ...
JF - Physical review letters. 78 (1997), H. 8
Y1 - 1997
SN - 0031-9007
N1 - ISSN der E-Ausg.: 1079-7114
SP - 1544
EP - 1547
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Schmidt, T.
A1 - Haug, R. J.
T1 - Observation of the local structure of landau bands in a disordered conductor / T. Schmidt ; R. J. Haug ; Vladimir I. Fal'ko ... A. Förster ...
JF - Physical review letters. 78 (1997), H. 8
Y1 - 1997
SN - 0031-9007
N1 - ISSN der E-Ausg.: 1079-7114
SP - 1540
EP - 1543
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Rosenauer, A.
A1 - Remmele, T.
T1 - Atomic scale strain measurements by the digital analysis of transmission electron microscopic lattice images / A. Rosenauer ; T. Remmele ; D. Gerthsen ... A. Förster
JF - Optik : international journal for light and electron optics. 105 (1997), H. 3
Y1 - 1997
SN - 0030-4026
SP - 99
EP - 107
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Lachenmann, S. G.
A1 - Kastalsky, A.
T1 - Properties of Nb/InAs/Nb hybrid step junctions / S. G. Lachenmann ; A. Kastalsky ; I. Friedrich ; A. Förster ...
JF - Journal of low temperature physics. 106 (1997), H. 3-4
Y1 - 1997
SN - 0022-2291
N1 - ISSN der E-Ausg.: 1573-7357
SP - 321
EP - 326
ER -
TY - JOUR
A1 - Ungermanns, C.
A1 - Ahe, M. v. d.
A1 - Carius, Reinhard
A1 - Förster, Arnold
T1 - Optimization of III/V binary growth with RHEED in MOMBE / C. Ungermanns ; M. v. d. Ahe ; R. Carius ; A. Förster ...
JF - Fresenius' Journal of Analytical Chemistry. 358 (1997), H. 1-2
Y1 - 1997
SN - 0937-0633
N1 - ISSN der E-Ausg.: 1432-1130
SP - 101
EP - 104
ER -
TY - JOUR
A1 - Förster, Arnold
A1 - Janssen, G.
A1 - Roer, T. G. van de
T1 - Logic Circuits with reduced complexity based on devices with higher functionality / G. Janssen ; T. G. van de Roer ; W. Prost ... A. Förster
JF - Proceedings / STW/SAFE 2nd Annual Workshop on Semiconductor Advances for Future Electronics, Safe '99 - ProRISC/IEEE 10th Annual Workshop on Circuits, Systems and Signal Processing, ProRISC 99 : November 24 - 26, 1999, Mierlo, The Netherlands [Elektronische Ressource]
Y1 - 1999
N1 - SAFE <2, 1999, Mierlo> ; Workshop on Circuits, Systems and Signal Processing <10, 1999, Mierlo> ; Stichting voor de Technische Wetenschappen
SP - 219
PB - Technology Foundation, STW
CY - Utrecht
ER -
TY - JOUR
A1 - Förster, Arnold
T1 - Resonant tunneling diodes operating as modern quantum transport devices
JF - Proceedings of the Tenth International Workshop on the Physics of Semiconductor Devices : (December 14 - 18, 1999) / ed.: Vikram Kumar ... - Vol. 2
Y1 - 2000
SN - 81-7023-998-2
N1 - International Workshop on the Physics of Semiconductor Devices <10, 1999, Delhi>
SP - 966
EP - 966
PB - Allied Publ.
CY - New Delhi [u.a.]
ER -
TY - JOUR
A1 - Kern, Alexander
A1 - Schelthoff, Christof
T1 - Auswahl von Blitzschutzmassnahmen nach DIN EN 623305 (VDE 0185-305-x)
JF - etz Elektrotechnik und Automation. 127 (2007), H. 8
Y1 - 2007
SN - 0948-7387
N1 - in der Bibliothek unter den Signaturen : 23 Z 133 und 63 ZS 035 vorhanden
SP - 83
EP - 90
ER -
TY - JOUR
A1 - Kern, Alexander
A1 - Schelthoff, Christof
T1 - Trennungsabstand bei Blitzschutzsystemen. Die Anforderungen nach VDE 0185-305-3:2006:10
JF - de- Der Elektro- und Gebäudetechniker (2007)
Y1 - 2007
SP - 43
EP - 48
ER -
TY - JOUR
A1 - Schwarzer, Klemens
A1 - Silva, Maria Eugenia Vieira da
T1 - Characterisation and design methods of solar cookers / Schwarzer, Klemens ; Silva, Maria Eugenia Vieira da
JF - Solar energy. 82 (2008), H. 2
Y1 - 2008
SN - 0038-092X
SP - 157
EP - 163
ER -
TY - JOUR
A1 - Kern, Alexander
A1 - Schelthoff, Christof
A1 - Mathieu, Moritz
T1 - Probability of lightning strikes to air-terminations of structures using the electro-geometrical model theory and the statistics of lightning current parameters
JF - Atmospheric Research. 104 (2011)
Y1 - 2011
SN - 0169-8095
N1 - Article in Press
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Kern, Alexander
A1 - Scheibe, Klaus
T1 - Die neuen internationalen Blitzschutz-Standards der Reihe IEC 62305:2010 : Überblick und Stand der Umsetzung in die nationale Normenreihe DIN EN 62305
JF - 9. VDE/ABB-Blitzschutztagung : Vorträge der 9. VDE/ABB-Fachtagung vom 27. bis 28. Oktober 2011 in Neu-Ulm / Veranst.: Ausschuss für Blitzschutz und Blitzforschung (ABB) im VDE Verband der Elektrotechnik Elektronik Informationstechnik e.V. Wiss. Tagungsleitung: K. Stimper
Y1 - 2011
SN - 978-3-8007-3380-4
N1 - VDE/ABB-Blitzschutztagung ; (9 ; 2011.10.27-28 ; Neu-Ulm)
SP - 7
EP - 12
PB - VDE-Verl.
CY - Berlin
ER -
TY - BOOK
A1 - Pieper, Martin
T1 - Spektralrandintegralmethoden zur Maxwell-Gleichung
Y1 - 2007
SN - 978-3-89959-635-9
N1 - Zugl.: Göttingen, Univ., Diss., 2007
PB - Der Andere Verl.
CY - Tönning [u.a.]
ER -
TY - JOUR
A1 - Pieper, Martin
A1 - Klein, Peter
T1 - A simple and accurate numerical network flow model for bionic micro heat exchangers
JF - Heat mass transfer
Y1 - 2011
SN - 0947-7411
VL - 47
IS - 5
SP - 491
EP - 503
PB - Springer
CY - Berlin
ER -
TY - JOUR
A1 - Pieper, Martin
A1 - Klein, Peter
T1 - Application of simple, periodic homogenization techniques to non-linear heat conduction problems in non-periodic, porous media
JF - Heat mass transfer
N2 - Often, detailed simulations of heat conduction in complicated, porous media have large runtimes. Then homogenization is a powerful tool to speed up the calculations by preserving accurate solutions at the same time. Unfortunately real structures are generally non-periodic, which requires unpractical, complicated homogenization techniques. We demonstrate in this paper, that the application of simple, periodic techniques to realistic media, that are just close to periodic, gives accurate, approximative solutions. In order to obtain effective parameters for the homogenized heat equation, we have to solve a so called “cell problem”. In contrast to periodic structures it is not trivial to determine a suitable unit cell, which represents a non-periodic media. To overcome this problem, we give a rule of thumb on how to choose a good cell. Finally we demonstrate the efficiency of our method for virtually generated foams as well as real foams and compare these results to periodic structures.
Y1 - 2012
U6 - https://doi.org/10.1007/s00231-011-0879-4
SN - 0947-7411
VL - 48
IS - 2
SP - 291
EP - 300
PB - Springer
CY - Berlin
ER -
TY - JOUR
A1 - Pieper, Martin
A1 - Klein, Peter
T1 - Numerical solution of the heat equation with non-linear, time derivative-dependent source term
JF - International Journal for Numerical Methods in Engineering
N2 - The mathematical modeling of heat conduction with adsorption effects in coated metal structures yields the heat equation with piecewise smooth coefficients and a new kind of source term. This term is special, because it is non-linear and furthermore depends on a time derivative. In our approach we reformulated this as a new problem for the usual heat equation, without source term but with a new non-linear coefficient. We gave an existence and uniqueness proof for the weak solution of the reformulated problem. To obtain a numerical solution, we developed a semi-implicit and a fully implicit finite volume method. We compared these two methods theoretically as well as numerically. Finally, as practical application, we simulated the heat conduction in coated aluminum fibers with adsorption in the zeolite coating. Copyright © 2010 John Wiley & Sons, Ltd.
Y1 - 2010
U6 - https://doi.org/10.1002/nme.2937
SN - 0029-5981
VL - 84
IS - 10
SP - 1205
EP - 1221
PB - Wiley
CY - Chichester
ER -
TY - JOUR
A1 - Pieper, Martin
T1 - Nonlinear integral equations for an inverse electromagnetic scattering problem
JF - Journal of Physics Conference Series. 124 (2008)
Y1 - 2008
SN - 1742-6596
ER -
TY - JOUR
A1 - Pieper, Martin
A1 - Ivanyshyn, Olha
T1 - Nonlinear integral equations for a 3D inverse acoustic scattering problem : abstract / O. Ivanyshyn and M. Pieper
Y1 - 2008
N1 - World Congress on Computational Mechanics <8, 2008, Venedig> ; European Congress on Computational Methods in Applied Sciences and Engineering <5, 2008, Venedig>
ER -