@article{26007,
  abstract     = {{We report on the synthesis of lamellar mesostructured aluminophosphate composites which contain variable relative amounts of aluminium oxide species in the core regions of the lamellae; this is investigated quantitatively by Al K-edge XANES spectroscopy. Templating is achieved by the utilisation of monododecyl phosphate surfactant. If no phosphorous source (such as H3PO4) is used for the synthesis, the phosphate head groups of the surfactant become incorporated into the inorganic network to form similar lamellar aluminophosphate structures. Thus, the surfactant serves as both template and reactant.}},
  author       = {{Tiemann, Michael and Fröba, M. and Wong, J.}},
  issn         = {{0272-9172}},
  journal      = {{MRS Proceedings}},
  title        = {{{Synthesis and Al K-Edge Xanes Investigation of Mesostructured Aluminophosphates}}},
  doi          = {{10.1557/proc-547-87}},
  year         = {{1999}},
}

@inproceedings{39890,
  author       = {{Otterbach, R. and Hilleringmann, Ulrich}},
  booktitle    = {{29th European Solid-State Device Research Conference}},
  pages        = {{320--323}},
  title        = {{{High rate CVD-diamond etching for high temperature pressure sensor applications}}},
  volume       = {{1}},
  year         = {{1999}},
}

@article{43328,
  abstract     = {{Intraband emission resulting from the second-order polarization induced by a femtosecond pump field in semiconductor nanostructures is calculated. The two-band model is transformed to the exciton representation, and exciton-phonon coupling represented by arbitrary spectral densities is incorporated into the equations of motion for the relevant exciton variables through Redfield superoperators. Time-resolved coherent and incoherent terahertz radiation as well as the incoherent optical fluorescence are calculated for a one-dimensional model of coupled quantum wells in an external electric field with on-site Coulomb interaction between electrons and holes and an overdamped Brownian oscillator spectral density representing the electron-phonon coupling. A doorway-window picture based on the reduced single-electron density matrix is developed for the analysis of both signals. Disorder and phonon-induced dephasing effects on the various signals are discussed and compared.}},
  author       = {{Meier, Torsten and Zhang, W.M. and Chernyak, V. and Mukamel, S.}},
  journal      = {{Physical Review B}},
  number       = {{4}},
  publisher    = {{American Physical Society}},
  title        = {{{Intraband terahertz emission from coupled semiconductor quantum wells: A model study using the exciton representation}}},
  doi          = {{10.1103/PhysRevB.60.2599}},
  volume       = {{60}},
  year         = {{1999}},
}

@article{43329,
  abstract     = {{Frequency mixing ( 2ω1−ω2) is demonstrated in femtosecond nondegenerate four-wave mixing (FWM) on GaAs multiple quantum wells using two synchronized, independently tunable lasers. The frequency mixing component in the spectrally resolved FWM coexists with the exciton resonance, and it dominates over the exciton component at high intensity and high detuning. This off-resonant component is present only for delays smaller than the temporal pulse width, whereas the resonant exciton component survives for longer delays.}},
  author       = {{Meier, Torsten and Ahn, Y. H. and Yahng, J. S. and Sohn, J. Y. and Yee, K. J. and Hohng, S. C. and Woo, J. C. and Kim, D. S. and Koch, S.W. and Lim, Y. S. and Kim, E. K.}},
  journal      = {{Physical review letters}},
  number       = {{19}},
  publisher    = {{American Physical Society}},
  title        = {{{From exciton resonance to frequency mixing in GaAs multiple quantum wells}}},
  doi          = {{10.1103/PhysRevLett.82.3879}},
  volume       = {{82}},
  year         = {{1999}},
}

@article{43330,
  abstract     = {{Differential absorption spectra of high-quality InGaAs quantum wells are presented for various pump detunings and polarization configurations. For low intensity pump pulses tuned well below the exciton a redshift is observed for opposite circularly polarized probe pulses. Microscopic calculations show that this redshift originates from memory effects in the Coulomb-induced excitonic correlations.}},
  author       = {{Meier, Torsten and Sieh, C. and Jahnke, F. and Knorr, A. and Koch, S.W. and Brick, P. and Hübner, M. and Ell, C. and Prineas, J. and Khitrova, G. and Gibbs, H.M.}},
  journal      = {{Physical review letters}},
  number       = {{15}},
  publisher    = {{American Physical Society}},
  title        = {{{Coulomb memory signatures in the excitonic optical Stark effect}}},
  doi          = {{10.1103/PhysRevLett.82.3112}},
  volume       = {{82}},
  year         = {{1999}},
}

@article{43331,
  abstract     = {{A new spectroscopic technique is demonstrated on three characteristically different semiconductor quantum-well samples. Coherent excitation spectroscopy reveals coherent coupling and effectively suppresses the signatures of inhomogeneous broadening and incoherent transfer between various excitonic states in quantum wells. Coherently coupled homogeneous subsystems are analyzed in an inhomogeneously broadened excitonic ensemble.}},
  author       = {{Meier, Torsten and Euteneuer, A. and Finger, E. and Hofmann, M. and Stolz, W. and Thomas, P. and Koch, S.W. and Rühle, W.W. and Hey, R. and Ploog, K.}},
  journal      = {{Physical review letters}},
  number       = {{10}},
  publisher    = {{American Physical Society}},
  title        = {{{Coherent excitation spectroscopy on inhomogeneous exciton ensembles}}},
  doi          = {{10.1103/PhysRevLett.83.2073}},
  volume       = {{83}},
  year         = {{1999}},
}

@article{43326,
  abstract     = {{The distribution of cooperative radiative decay rates in photosynthetic aggregates is calculated using a Frenkel exciton model with static diagonal disorder. This distribution which depends on both the exciton coherence sizes and the aggregate geometry can be directly observed using single-molecule spectroscopy. Comparison is made with a dynamic exciton self-trapping (polaron) mechanism for localization.}},
  author       = {{Meier, Torsten and Zhao, Y. and Zhang, W.M. and Chernyak, V. and Mukamel, S.}},
  journal      = {{The Journal of Physical Chemistry B}},
  number       = {{19}},
  pages        = {{3954--3962}},
  publisher    = {{American Chemical Society}},
  title        = {{{Superradiance Coherence Sizes in Single-Molecule Spektroscopy of LH2 Antenna Complexes}}},
  doi          = {{10.1021/jp990140z}},
  volume       = {{103}},
  year         = {{1999}},
}

@article{43327,
  abstract     = {{Absorption changes in semiconductors induced by low-density populations are calculated using a one-dimensional model. The microscopic analysis includes Coulomb-induced many-body correlations and reveals distinct signatures of six particle correlations. The strength of exciton bleaching induced by excitons and electron-hole pairs is compared and analyzed.}},
  author       = {{Meier, Torsten and Koch, S.W.}},
  journal      = {{Physical Review B}},
  number       = {{20}},
  publisher    = {{American Physical Society}},
  title        = {{{Excitons versus unbound electron-hole pairs and their influence on exciton bleaching: A model study}}},
  doi          = {{10.1103/PhysRevB.59.13202}},
  volume       = {{59}},
  year         = {{1999}},
}

@article{43325,
  abstract     = {{Nonlinear exciton equations for one- and two-exciton variables, obtained by mapping the two-band model onto the molecular (Frenkel) Hamiltonian, are applied to calculate resonant optical nonlinearities in two-dimensional semiconductors in a strong perpendicular magnetic field. The polarization dependence of the time-resolved four-wave-mixing signals provides a direct probe for the two-exciton manifold as well as for the asymmetry of the particle-particle and particle-hole Coulomb interactions.}},
  author       = {{Meier, Torsten and Yokojima, S. and Chernyak, V. and Mukamel, S.}},
  journal      = {{Physical Review B}},
  number       = {{19}},
  title        = {{{Femtosecond four-wave-mixing spectroscopy of interacting magnetoexcitons in semiconductor quantum wells}}},
  doi          = {{10.1103/PhysRevB.59.12584}},
  volume       = {{59}},
  year         = {{1999}},
}

@misc{43542,
  author       = {{Schroeter-Wittke, Harald}},
  booktitle    = {{http://www.amazon.de}},
  title        = {{{Helmut Klotz: Der Pfaffe und der Alchimist. Was Chemiker von Theologen wissen sollten und umgekehrt, Stuttgart 1999}}},
  year         = {{1999}},
}

@article{43543,
  author       = {{Schroeter-Wittke, Harald and Osteroth, Martin}},
  journal      = {{SpielBox-Edition Nr. 37}},
  number       = {{1}},
  pages        = {{29--32}},
  title        = {{{Rangeln - ein taktisches Brettspiel für 3-5 Personen}}},
  year         = {{1999}},
}

@misc{43544,
  author       = {{Schroeter-Wittke, Harald and Osteroth, Martin}},
  publisher    = {{QueenGames}},
  title        = {{{Mückenstich - ein flottes Kartenspiel für 3-6 Spieler}}},
  year         = {{1999}},
}

@inproceedings{44272,
  abstract     = {{A microscope many-body theory for the nonlinear optical response of semiconductors is reviewed. The importance of Coulomb interaction induced carrier correlations is demonstrated in excitonic pump-probe spectra. The influence of excitonic and biexcitonic contributions to coherent pump- induced absorption changes at the exciton frequency are discussed. Absorption changes induced by incoherent exciton and unbound electron-hole populations are studied.}},
  author       = {{Meier, Torsten and Koch, S.W.}},
  booktitle    = {{Photonic Systems and Applications in Defense and Manufacturing}},
  pages        = {{24--35}},
  publisher    = {{SPIE}},
  title        = {{{Optical linearities in semiconductors}}},
  doi          = {{10.1117/12.368481}},
  volume       = {{3898}},
  year         = {{1999}},
}

@inproceedings{44273,
  abstract     = {{It is demonstrated that the optical response of semiconductor systems is influenced by various interactions. In detail, it is shown that meaningful calculations of optical nonlinearities in semiconductor structures require to microscopically include Coulomb-induced many-body carrier-correlations. Some distinct signatures induced by correlations in nonlinear optical signals are presented and discussed.}},
  author       = {{Meier, Torsten and Jahnke, F. and Koch, S.W.}},
  booktitle    = {{Technical Digest. CLEO/Pacific Rim'99. Pacific Rim Conference on Lasers and Electro-Optics}},
  isbn         = {{0-7803-5661-6}},
  location     = {{Seoul, Korea (South)}},
  pages        = {{632--633}},
  publisher    = {{IEEE}},
  title        = {{{Optical nonlinearities in semiconductor quantum-well and microcavity structures}}},
  doi          = {{10.1109/CLEOPR.1999.817755}},
  volume       = {{3}},
  year         = {{1999}},
}

@inbook{44581,
  author       = {{Adelmann, Ralf}},
  booktitle    = {{9. Internationales Bochumer Videofestival (Katalog)}},
  pages        = {{50--51}},
  publisher    = {{SKM}},
  title        = {{{Alle lieben Video}}},
  year         = {{1999}},
}

@inbook{45217,
  author       = {{Herzig, Bardo and Tulodziecki, G.}},
  booktitle    = {{Einblicke – Ausblicke. 25 Jahre Universität Paderborn}},
  editor       = {{Fisch, E. and Vollmer, H.}},
  pages        = {{103--112}},
  publisher    = {{Bonifatius Druck}},
  title        = {{{Neue Medien – welchen Beitrag können sie für schulische Innovationen leisten? }}},
  year         = {{1999}},
}

@article{45218,
  author       = {{Blanck, B. and Herzig, Bardo and Loh, W.}},
  journal      = {{Streitforum für Erwägungskultur EuS 10(1999)1}},
  pages        = {{144--151}},
  title        = {{{Metakritik als Erforschung des vielfältigen Umgangs mit Vielfalt. Ethik und Sozialwissenschaften}}},
  year         = {{1999}},
}

@inproceedings{56575,
  author       = {{Haarslev, Volker and Möller, Ralf and Turhan, Anni-Yasmin and Wessel, Michael}},
  booktitle    = {{Proceedings of the 1999 International Workshop on Description Logics (DL’99), Linköping, Sweden, July 30 - August 1, 1999}},
  editor       = {{Lambrix, Patrick and Borgida, Alexander and Lenzerini, Maurizio and Möller, Ralf and Patel-Schneider, Peter F.}},
  publisher    = {{CEUR-WS.org}},
  title        = {{{On Terminological Default Reasoning about Spatial Information: Extended Abstract}}},
  volume       = {{22}},
  year         = {{1999}},
}

@article{17508,
  author       = {{Peckhaus, Volker}},
  journal      = {{Philosophia Scientiae (Nancy) 3 (4) (1998/1999), special issue: Un logicien consciencieux. La philosophie de Evert Willem Beth}},
  pages        = {{151--173}},
  title        = {{{Moral Integrity during a Difficult Period: Beth and Scholz}}},
  year         = {{1999}},
}

@book{44832,
  author       = {{Freitag, Christine and Fiegert, Monika}},
  pages        = {{219}},
  publisher    = {{Fromm}},
  title        = {{{„…des Morgens Bäthet der Lehrer zu erst.“ Eine kommentierte Quellensammlung zur Geschichte des ländlichen Schulwesens im Osnabrücker Raum 1690-1865, hrsg. vom Landkreis Osnabrück}}},
  volume       = {{10}},
  year         = {{1999}},
}