@inproceedings{StaatBallmann1989,
  author    = {Staat, Manfred and Ballmann, J.},
  title     = {Fundamental aspects of numerical methods for the propagation of multi-dimensional nonlinear waves in solids},
  series = {Nonlinear hyperbolic equations : theory, computations methods, and applications ; proceedings of the 2nd International Conference on Nonlinear Hyperbolic Problems, Aachen},
  booktitle = {Nonlinear hyperbolic equations : theory, computations methods, and applications ; proceedings of the 2nd International Conference on Nonlinear Hyperbolic Problems, Aachen},
  pages     = {574 -- 588},
  year      = {1989},
  abstract  = {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.},
  subject      = {Nichtlineare Welle},
  language  = {en}
}
@book{Grap1989,
  author    = {Grap, Rolf Dietmar},
  title     = {Gestaltung menschengerechter Arbeitspl{\"a}tze in der Schulbuchproduktion: Ergebnisse der Ist-Analyse - Arbeitswissenschaftlicher Teil},
  publisher = {IAW - Lehrstuhl und Institut f{\"u}r Arbeitswissenschaft der RWTH Aachen},
  address   = {Aachen},
  year      = {1989},
  language  = {de}
}
@book{Grap1989,
  author    = {Grap, Rolf Dietmar},
  title     = {Gestaltung menschengerechter Arbeitspl{\"a}tze in der Schulbuchproduktion: Vorschl{\"a}ge zum Sollkonzept - Arbeitswissenschaftlicher Teil},
  publisher = {IAW - Lehrstuhl und Institut f{\"u}r Arbeitswissenschaft der RWTH Aachen},
  address   = {Aachen},
  year      = {1989},
  language  = {de}
}
@article{Grap1989,
  author    = {Grap, Rolf Dietmar},
  title     = {Die Multimomentstudie als Hilfsmittel zur Objektivierung der Beobachtung von Probanden bei Unternehmungsspielen},
  series = {Jahresdokumentation ... der Gesellschaft f{\"u}r Arbeitswissenschaft e.V..},
  journal   = {Jahresdokumentation ... der Gesellschaft f{\"u}r Arbeitswissenschaft e.V..},
  publisher = {Schmidt},
  address   = {K{\"o}ln},
  year      = {1989},
  language  = {de}
}
@book{GrapRajapaksha1989,
  author    = {Grap, Rolf Dietmar and Rajapaksha, Rolf},
  title     = {Gestaltung menschengerechter Arbeitspl{\"a}tze in der Schulbuchproduktion / [Zsstellung des Berichts: Rolf Rajapaksha]},
  publisher = {Cornelsen},
  address   = {Berlin},
  pages     = {78 S.},
  year      = {1989},
  language  = {de}
}
@article{Gebhardt1989,
  author    = {Gebhardt, Andreas},
  title     = {H{\"a}rten von Kurbelwellen},
  pages     = {1 -- 14},
  year      = {1989},
  language  = {de}
}
@article{Grap1989,
  author    = {Grap, Rolf Dietmar},
  title     = {Softwareergonomie bei der Arbeit mit Großrechnern},
  series = {pro Ort (1989)},
  journal   = {pro Ort (1989)},
  pages     = {31},
  year      = {1989},
  language  = {de}
}
@article{GrundmannKramerGerhardt1989,
  author    = {Grundmann, Reinhard and Kramer, Carl and Gerhardt, Hans Joachim},
  title     = {Zonenabsaugung und Bel{\"u}ftung f{\"u}r eine Produktionshalle mit zeitweilig auftretender hoher Staubentwicklung},
  series = {DKV-Tagungsbericht, Deutscher K{\"a}lte- und Klimatechnischer Verein. 4 (1989)},
  journal   = {DKV-Tagungsbericht, Deutscher K{\"a}lte- und Klimatechnischer Verein. 4 (1989)},
  isbn      = {0172-8849},
  pages     = {981 -- 998},
  year      = {1989},
  language  = {de}
}
@article{Heinrichs1989,
  author    = {Heinrichs, Horst},
  title     = {Verbindung von CAD und CAE mittels der systemneutralen CAD I Schnittstelle},
  pages     = {391 -- 408},
  year      = {1989},
  language  = {de}
}
@article{Blome1989,
  author    = {Blome, Hans-Joachim},
  title     = {Wie funktionieren die aktiven Kerne der Galaxien?},
  series = {Naturwissenschaften. 76 (1989), H. 7},
  journal   = {Naturwissenschaften. 76 (1989), H. 7},
  isbn      = {0028-1042},
  pages     = {310 -- 317},
  year      = {1989},
  language  = {de}
}
@article{Pietsch1989,
  author    = {Pietsch, Wolfram},
  title     = {Konzepte und Instrumente f{\"u}r Organisation und Management evolution{\"a}rer Softwareentwicklungsprojekte},
  series = {Computergest{\"u}tzter Arbeitsplatz : M{\"u}nchen, 18. - 20. Oktober 1989 ; proceedings / M. Paul (Hrsg.) Bd. 2},
  journal   = {Computergest{\"u}tzter Arbeitsplatz : M{\"u}nchen, 18. - 20. Oktober 1989 ; proceedings / M. Paul (Hrsg.) Bd. 2},
  publisher = {Springer},
  address   = {Berlin [u.a.]},
  isbn      = {3-540-51822-3},
  pages     = {221 -- 231},
  year      = {1989},
  language  = {de}
}
@article{PietschKurbel1989,
  author    = {Pietsch, Wolfram and Kurbel, Karl},
  title     = {Expertensystem-Projekte. Entwicklungsmethodik, Organisation und Management / Kurbel, K., Pietsch, W.},
  series = {Informatik-Spektrum. 12 (1989), H. 2},
  journal   = {Informatik-Spektrum. 12 (1989), H. 2},
  isbn      = {0170-6012},
  pages     = {133 -- 146},
  year      = {1989},
  language  = {de}
}
@article{Blome1989,
  author    = {Blome, Hans-Joachim},
  title     = {Das Quantenvakuum und die kosmologische Konstante},
  series = {Physikalische Bl{\"a}tter. 45 (1989)},
  journal   = {Physikalische Bl{\"a}tter. 45 (1989)},
  isbn      = {0342-4472},
  pages     = {51 -- 56},
  year      = {1989},
  language  = {de}
}
@book{Rick1989,
  author    = {Rick, Heino},
  title     = {Steuerreform 1990 : alle {\"A}nderungen u. Auswirkungen f{\"u}r Unternehmen u. Selbst{\"a}ndige ; {\"A}nderungen u. Auswirkungen nach Problem- u. Sachbereichen ; Gesetzestext ; Was ist neu? ; Auswirkungen u. Beisp., Modellabrechnungen},
  publisher = {WEKA-Fachverl., Fachverl. f{\"u}r Gesch{\"a}ftsf{\"u}hrung u. Management},
  address   = {Kissing [u.a.]},
  pages     = {143 S. : graph. Darst.},
  year      = {1989},
  language  = {de}
}
@book{Kettern1989,
  author    = {Kettern, J{\"u}rgen},
  title     = {Untersuchungen zur biologisch-chemisch-physikalischen Behandlung von Deponiesickerw{\"a}ssern},
  pages     = {XIV, 184 S. m. 72 Abb., 55 Tab., Anl.},
  year      = {1989},
  language  = {de}
}
@article{HoettgesArnoldRouve1989,
  author    = {H{\"o}ttges, J{\"o}rg and Arnold, Uwe and Rouv{\´e}, Gerhard},
  title     = {Combined Digital Image and Finite Element Analysis of Mixing in Compound Open Channel Flow / Arnold, U.; J. H{\"o}ttges; G. Rouv{\´e}},
  series = {Refined flow modelling and turbulence measurements : proceedings of the Third International Symposium Tokyo, Japan 26 - 28 July, 1988 / ed. by Y. Iwasa. Scientific Organizing Committee of the Third International Symposium on Refined Flow Modelling and Tur},
  journal   = {Refined flow modelling and turbulence measurements : proceedings of the Third International Symposium Tokyo, Japan 26 - 28 July, 1988 / ed. by Y. Iwasa. Scientific Organizing Committee of the Third International Symposium on Refined Flow Modelling and Tur},
  publisher = {Universal Acad. Press},
  address   = {Tokyo},
  isbn      = {4-946443-03-7},
  pages     = {569 -- 576},
  year      = {1989},
  language  = {en}
}
@article{HagemannGeittnerSchnittkeretal.1989,
  author    = {Hagemann, Hans-J{\"u}rgen and Geittner, P. and Schnittker, W. and Warnier, J.},
  title     = {Abscheidegeschwindigkeiten und Prozeßausbeuten im PCVD-Verfahren. Geittner, P.; Hagemann, H. J.; Schnittker, W.; Warnier, J.; Weling, F.; Wilson, H.},
  series = {Philips - Unsere Forschung in Deutschland / Hrsg.: Philips Forschungslaboratorium GmbH Aachen und Hamburg. 4 (1989)},
  journal   = {Philips - Unsere Forschung in Deutschland / Hrsg.: Philips Forschungslaboratorium GmbH Aachen und Hamburg. 4 (1989)},
  pages     = {140 -- 143},
  year      = {1989},
  language  = {de}
}
@article{Hagemann1989,
  author    = {Hagemann, Hans-J{\"u}rgen},
  title     = {St{\"o}rstellengleichgewichte in eisendotierten Titanaten. Hagemann, H. J.},
  series = {Philips - Unsere Forschung in Deutschland / Hrsg.: Philips Forschungslaboratorium GmbH Aachen und Hamburg. 4 (1989)},
  journal   = {Philips - Unsere Forschung in Deutschland / Hrsg.: Philips Forschungslaboratorium GmbH Aachen und Hamburg. 4 (1989)},
  pages     = {170 -- 172},
  year      = {1989},
  language  = {de}
}
@article{HagemannGeittnerLeers1989,
  author    = {Hagemann, Hans-J{\"u}rgen and Geittner, P. and Leers, D.},
  title     = {Intrinsic scattering and absorption losses of Ge- and F-doped optical fibres prepared by PCVD. Geittner, P.; Hagemann, H. J. ; Leers, D.},
  series = {Electronics letters : an intern. publication / The Institution of Electrical Engineers. 25 (1989), H. 7},
  journal   = {Electronics letters : an intern. publication / The Institution of Electrical Engineers. 25 (1989), H. 7},
  isbn      = {0013-5194},
  pages     = {436 -- 437},
  year      = {1989},
  language  = {en}
}
@book{Gerhardt1989,
  author    = {Gerhardt, Hans Joachim},
  title     = {Lagersicherheit lose verlegter W{\"a}rmed{\"a}mmplatten auf Flachd{\"a}chern gegen Abheben durch Windeinwirkung : Abschlußbericht zum Forschungsvorhaben "Lose verlegte W{\"a}rmed{\"a}mmplatten" / H. J. Gerhardt ; K. K. Bofah ; C. Kramer},
  publisher = {IRB-Verl.},
  address   = {Stuttgart},
  pages     = {26, 3, 32 S. : Ill., graph. Darst., 30 cm},
  year      = {1989},
  language  = {de}
}