---
_id: '42731'
author:
- first_name: Wolfgang
  full_name: Hofkirchner, Wolfgang
  last_name: Hofkirchner
- first_name: Christian
  full_name: Fuchs, Christian
  id: '21863'
  last_name: Fuchs
  orcid: 0000-0003-0589-4579
- first_name: Celina
  full_name: Raffl, Celina
  last_name: Raffl
- first_name: Matthias
  full_name: Schafranek, Matthias
  last_name: Schafranek
- first_name: Marisol
  full_name: Sandoval, Marisol
  last_name: Sandoval
- first_name: Robert
  full_name: Bichler, Robert
  last_name: Bichler
citation:
  ama: 'Hofkirchner W, Fuchs C, Raffl C, Schafranek M, Sandoval M, Bichler R. <i>ICTs
    and Society: The Salzburg Approach: Towards a Theory for, about, and by Means
    of the Information Society. ICT&#38;S Research Paper No. 3</i>. ICT&#38;S Center;
    2007.'
  apa: 'Hofkirchner, W., Fuchs, C., Raffl, C., Schafranek, M., Sandoval, M., &#38;
    Bichler, R. (2007). <i>ICTs and society: The Salzburg Approach: Towards a Theory
    for, about, and by Means of the Information Society. ICT&#38;S Research Paper
    No. 3</i>. ICT&#38;S Center.'
  bibtex: '@book{Hofkirchner_Fuchs_Raffl_Schafranek_Sandoval_Bichler_2007, place={Salzburg},
    title={ICTs and society: The Salzburg Approach: Towards a Theory for, about, and
    by Means of the Information Society. ICT&#38;S Research Paper No. 3}, publisher={ICT&#38;S
    Center}, author={Hofkirchner, Wolfgang and Fuchs, Christian and Raffl, Celina
    and Schafranek, Matthias and Sandoval, Marisol and Bichler, Robert}, year={2007}
    }'
  chicago: 'Hofkirchner, Wolfgang, Christian Fuchs, Celina Raffl, Matthias Schafranek,
    Marisol Sandoval, and Robert Bichler. <i>ICTs and Society: The Salzburg Approach:
    Towards a Theory for, about, and by Means of the Information Society. ICT&#38;S
    Research Paper No. 3</i>. Salzburg: ICT&#38;S Center, 2007.'
  ieee: 'W. Hofkirchner, C. Fuchs, C. Raffl, M. Schafranek, M. Sandoval, and R. Bichler,
    <i>ICTs and society: The Salzburg Approach: Towards a Theory for, about, and by
    Means of the Information Society. ICT&#38;S Research Paper No. 3</i>. Salzburg:
    ICT&#38;S Center, 2007.'
  mla: 'Hofkirchner, Wolfgang, et al. <i>ICTs and Society: The Salzburg Approach:
    Towards a Theory for, about, and by Means of the Information Society. ICT&#38;S
    Research Paper No. 3</i>. ICT&#38;S Center, 2007.'
  short: 'W. Hofkirchner, C. Fuchs, C. Raffl, M. Schafranek, M. Sandoval, R. Bichler,
    ICTs and Society: The Salzburg Approach: Towards a Theory for, about, and by Means
    of the Information Society. ICT&#38;S Research Paper No. 3, ICT&#38;S Center,
    Salzburg, 2007.'
date_created: 2023-03-06T03:52:27Z
date_updated: 2023-03-08T05:38:57Z
department:
- _id: '136'
extern: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://icts.sbg.ac.at/media/pdf/pdf1490.pdf
oa: '1'
place: Salzburg
publication_identifier:
  issn:
  - 1990-8563
publisher: ICT&S Center
status: public
title: 'ICTs and society: The Salzburg Approach: Towards a Theory for, about, and
  by Means of the Information Society. ICT&S Research Paper No. 3'
type: report
user_id: '49063'
year: '2007'
...
---
_id: '43264'
abstract:
- lang: eng
  text: On the basis of a microscopic theory, the signatures of many-particle correlations
    in Two-Dimensional Fourier-Transform Spectra (2D-FTS) of semiconductor nanostructures
    are identified and compared to experimental data. Spectra in the photon energy
    range of the heavy-hole and light-hole excitonic resonances show characteristic
    features due to correlations, which depend on the relative polarization directions
    of the excitation pulses.
author:
- first_name: I.
  full_name: Kuznetsova, I.
  last_name: Kuznetsova
- first_name: P.
  full_name: Thomas, P.
  last_name: Thomas
- first_name: Torsten
  full_name: Meier, Torsten
  id: '344'
  last_name: Meier
  orcid: 0000-0001-8864-2072
- first_name: T.
  full_name: Zhang, T.
  last_name: Zhang
- first_name: X.
  full_name: Li, X.
  last_name: Li
- first_name: 'R.P. '
  full_name: 'Mirin, R.P. '
  last_name: Mirin
- first_name: S. T.
  full_name: Cundiff , S. T.
  last_name: 'Cundiff '
citation:
  ama: Kuznetsova I, Thomas P, Meier T, et al. Signatures of Many-Particle Correlations
    in Two-Dimensional Fourier-Transform Spectra of Semiconductor Nanostructures.
    <i>Solid state communications</i>. 2007;142(3):154-158. doi:<a href="https://doi.org/10.1016/j.ssc.2007.02.010">10.1016/j.ssc.2007.02.010</a>
  apa: Kuznetsova, I., Thomas, P., Meier, T., Zhang, T., Li, X., Mirin, R. P., &#38;
    Cundiff , S. T. (2007). Signatures of Many-Particle Correlations in Two-Dimensional
    Fourier-Transform Spectra of Semiconductor Nanostructures. <i>Solid State Communications</i>,
    <i>142</i>(3), 154–158. <a href="https://doi.org/10.1016/j.ssc.2007.02.010">https://doi.org/10.1016/j.ssc.2007.02.010</a>
  bibtex: '@article{Kuznetsova_Thomas_Meier_Zhang_Li_Mirin_Cundiff _2007, title={Signatures
    of Many-Particle Correlations in Two-Dimensional Fourier-Transform Spectra of
    Semiconductor Nanostructures}, volume={142}, DOI={<a href="https://doi.org/10.1016/j.ssc.2007.02.010">10.1016/j.ssc.2007.02.010</a>},
    number={3}, journal={Solid state communications}, publisher={Pergamon}, author={Kuznetsova,
    I. and Thomas, P. and Meier, Torsten and Zhang, T. and Li, X. and Mirin, R.P.  and
    Cundiff , S. T.}, year={2007}, pages={154–158} }'
  chicago: 'Kuznetsova, I., P. Thomas, Torsten Meier, T. Zhang, X. Li, R.P.  Mirin,
    and S. T. Cundiff . “Signatures of Many-Particle Correlations in Two-Dimensional
    Fourier-Transform Spectra of Semiconductor Nanostructures.” <i>Solid State Communications</i>
    142, no. 3 (2007): 154–58. <a href="https://doi.org/10.1016/j.ssc.2007.02.010">https://doi.org/10.1016/j.ssc.2007.02.010</a>.'
  ieee: 'I. Kuznetsova <i>et al.</i>, “Signatures of Many-Particle Correlations in
    Two-Dimensional Fourier-Transform Spectra of Semiconductor Nanostructures,” <i>Solid
    state communications</i>, vol. 142, no. 3, pp. 154–158, 2007, doi: <a href="https://doi.org/10.1016/j.ssc.2007.02.010">10.1016/j.ssc.2007.02.010</a>.'
  mla: Kuznetsova, I., et al. “Signatures of Many-Particle Correlations in Two-Dimensional
    Fourier-Transform Spectra of Semiconductor Nanostructures.” <i>Solid State Communications</i>,
    vol. 142, no. 3, Pergamon, 2007, pp. 154–58, doi:<a href="https://doi.org/10.1016/j.ssc.2007.02.010">10.1016/j.ssc.2007.02.010</a>.
  short: I. Kuznetsova, P. Thomas, T. Meier, T. Zhang, X. Li, R.P. Mirin, S.T. Cundiff
    , Solid State Communications 142 (2007) 154–158.
date_created: 2023-04-01T22:13:14Z
date_updated: 2023-04-01T22:13:17Z
department:
- _id: '293'
doi: 10.1016/j.ssc.2007.02.010
intvolume: '       142'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://www.sciencedirect.com/science/article/abs/pii/S0038109807001007
oa: '1'
page: 154-158
publication: Solid state communications
publication_status: published
publisher: Pergamon
status: public
title: Signatures of Many-Particle Correlations in Two-Dimensional Fourier-Transform
  Spectra of Semiconductor Nanostructures
type: journal_article
user_id: '49063'
volume: 142
year: '2007'
...
---
_id: '2111'
author:
- first_name: Kishore
  full_name: Kothapalli, Kishore
  last_name: Kothapalli
- first_name: Christian
  full_name: Scheideler, Christian
  id: '20792'
  last_name: Scheideler
- first_name: Melih
  full_name: Onus, Melih
  last_name: Onus
- first_name: Christian
  full_name: Schindelhauer, Christian
  last_name: Schindelhauer
citation:
  ama: 'Kothapalli K, Scheideler C, Onus M, Schindelhauer C. Distributed coloring
    in O/spl tilde/(/spl radic/(log n)) bit rounds. In: <i>IPDPS</i>. ; 2006.'
  apa: Kothapalli, K., Scheideler, C., Onus, M., &#38; Schindelhauer, C. (2006). Distributed
    coloring in O/spl tilde/(/spl radic/(log n)) bit rounds. In <i>IPDPS</i>.
  bibtex: '@inproceedings{Kothapalli_Scheideler_Onus_Schindelhauer_2006, title={Distributed
    coloring in O/spl tilde/(/spl radic/(log n)) bit rounds}, booktitle={IPDPS}, author={Kothapalli,
    Kishore and Scheideler, Christian and Onus, Melih and Schindelhauer, Christian},
    year={2006} }'
  chicago: Kothapalli, Kishore, Christian Scheideler, Melih Onus, and Christian Schindelhauer.
    “Distributed Coloring in O/Spl Tilde/(/Spl Radic/(Log n)) Bit Rounds.” In <i>IPDPS</i>,
    2006.
  ieee: K. Kothapalli, C. Scheideler, M. Onus, and C. Schindelhauer, “Distributed
    coloring in O/spl tilde/(/spl radic/(log n)) bit rounds,” in <i>IPDPS</i>, 2006.
  mla: Kothapalli, Kishore, et al. “Distributed Coloring in O/Spl Tilde/(/Spl Radic/(Log
    n)) Bit Rounds.” <i>IPDPS</i>, 2006.
  short: 'K. Kothapalli, C. Scheideler, M. Onus, C. Schindelhauer, in: IPDPS, 2006.'
date_created: 2018-04-03T05:22:43Z
date_updated: 2022-01-06T06:54:46Z
ddc:
- '040'
department:
- _id: '79'
file:
- access_level: open_access
  content_type: application/pdf
  creator: florida
  date_created: 2018-04-13T09:57:03Z
  date_updated: 2018-04-13T09:57:03Z
  file_id: '2334'
  file_name: IPDPS06.pdf
  file_size: 192708
  relation: main_file
file_date_updated: 2018-04-13T09:57:03Z
has_accepted_license: '1'
oa: '1'
publication: IPDPS
status: public
title: Distributed coloring in O/spl tilde/(/spl radic/(log n)) bit rounds
type: conference
urn: '21110'
user_id: '15504'
year: '2006'
...
---
_id: '2112'
author:
- first_name: Baruch
  full_name: Awerbuch, Baruch
  last_name: Awerbuch
- first_name: Christian
  full_name: Scheideler, Christian
  id: '20792'
  last_name: Scheideler
citation:
  ama: 'Awerbuch B, Scheideler C. Robust Random Number Generation for Peer-to-Peer
    Systems. In: <i>OPODIS</i>. Lecture Notes in Computer Science. ; 2006:275--289.'
  apa: Awerbuch, B., &#38; Scheideler, C. (2006). Robust Random Number Generation
    for Peer-to-Peer Systems. In <i>OPODIS</i> (pp. 275--289).
  bibtex: '@inproceedings{Awerbuch_Scheideler_2006, series={Lecture Notes in Computer
    Science}, title={Robust Random Number Generation for Peer-to-Peer Systems}, booktitle={OPODIS},
    author={Awerbuch, Baruch and Scheideler, Christian}, year={2006}, pages={275--289},
    collection={Lecture Notes in Computer Science} }'
  chicago: Awerbuch, Baruch, and Christian Scheideler. “Robust Random Number Generation
    for Peer-to-Peer Systems.” In <i>OPODIS</i>, 275--289. Lecture Notes in Computer
    Science, 2006.
  ieee: B. Awerbuch and C. Scheideler, “Robust Random Number Generation for Peer-to-Peer
    Systems,” in <i>OPODIS</i>, 2006, pp. 275--289.
  mla: Awerbuch, Baruch, and Christian Scheideler. “Robust Random Number Generation
    for Peer-to-Peer Systems.” <i>OPODIS</i>, 2006, pp. 275--289.
  short: 'B. Awerbuch, C. Scheideler, in: OPODIS, 2006, pp. 275--289.'
date_created: 2018-04-03T05:23:39Z
date_updated: 2022-01-06T06:54:46Z
ddc:
- '040'
department:
- _id: '79'
file:
- access_level: open_access
  content_type: application/pdf
  creator: florida
  date_created: 2018-04-13T09:57:51Z
  date_updated: 2018-04-13T09:57:51Z
  file_id: '2335'
  file_name: OPODIS06.pdf
  file_size: 198976
  relation: main_file
file_date_updated: 2018-04-13T09:57:51Z
has_accepted_license: '1'
oa: '1'
page: 275--289
publication: OPODIS
series_title: Lecture Notes in Computer Science
status: public
title: Robust Random Number Generation for Peer-to-Peer Systems
type: conference
urn: '21128'
user_id: '15504'
year: '2006'
...
---
_id: '2113'
author:
- first_name: Baruch
  full_name: Awerbuch, Baruch
  last_name: Awerbuch
- first_name: Christian
  full_name: Scheideler, Christian
  id: '20792'
  last_name: Scheideler
citation:
  ama: 'Awerbuch B, Scheideler C. Towards a scalable and robust DHT. In: <i>SPAA</i>.
    ; 2006:318--327.'
  apa: Awerbuch, B., &#38; Scheideler, C. (2006). Towards a scalable and robust DHT.
    In <i>SPAA</i> (pp. 318--327).
  bibtex: '@inproceedings{Awerbuch_Scheideler_2006, title={Towards a scalable and
    robust DHT}, booktitle={SPAA}, author={Awerbuch, Baruch and Scheideler, Christian},
    year={2006}, pages={318--327} }'
  chicago: Awerbuch, Baruch, and Christian Scheideler. “Towards a Scalable and Robust
    DHT.” In <i>SPAA</i>, 318--327, 2006.
  ieee: B. Awerbuch and C. Scheideler, “Towards a scalable and robust DHT,” in <i>SPAA</i>,
    2006, pp. 318--327.
  mla: Awerbuch, Baruch, and Christian Scheideler. “Towards a Scalable and Robust
    DHT.” <i>SPAA</i>, 2006, pp. 318--327.
  short: 'B. Awerbuch, C. Scheideler, in: SPAA, 2006, pp. 318--327.'
date_created: 2018-04-03T05:24:22Z
date_updated: 2022-01-06T06:54:46Z
ddc:
- '040'
department:
- _id: '79'
file:
- access_level: open_access
  content_type: application/pdf
  creator: florida
  date_created: 2018-04-13T10:00:09Z
  date_updated: 2018-04-13T10:00:09Z
  file_id: '2337'
  file_name: SPAA06.pdf
  file_size: 144588
  relation: main_file
file_date_updated: 2018-04-13T10:00:09Z
has_accepted_license: '1'
oa: '1'
page: 318--327
publication: SPAA
status: public
title: Towards a scalable and robust DHT
type: conference
urn: '21137'
user_id: '15504'
year: '2006'
...
---
_id: '18601'
author:
- first_name: Christoph
  full_name: Friedrich, Christoph
  last_name: Friedrich
- first_name: Arno
  full_name: Schindlmayr, Arno
  id: '458'
  last_name: Schindlmayr
  orcid: 0000-0002-4855-071X
citation:
  ama: 'Friedrich C, Schindlmayr A. Many-body perturbation theory: The GW approximation.
    In: Blügel S, Gompper G, Koch E, Müller-Krumbhaar H, Spatschek R, Winkler RG,
    eds. <i>Computational Condensed Matter Physics</i>. Vol 32. Matter and Materials.
    Jülich: Forschungszentrum Jülich; 2006:A5.1-A5.21.'
  apa: 'Friedrich, C., &#38; Schindlmayr, A. (2006). Many-body perturbation theory:
    The GW approximation. In S. Blügel, G. Gompper, E. Koch, H. Müller-Krumbhaar,
    R. Spatschek, &#38; R. G. Winkler (Eds.), <i>Computational Condensed Matter Physics</i>
    (Vol. 32, p. A5.1-A5.21). Jülich: Forschungszentrum Jülich.'
  bibtex: '@inbook{Friedrich_Schindlmayr_2006, place={Jülich}, series={Matter and
    Materials}, title={Many-body perturbation theory: The GW approximation}, volume={32},
    booktitle={Computational Condensed Matter Physics}, publisher={Forschungszentrum
    Jülich}, author={Friedrich, Christoph and Schindlmayr, Arno}, editor={Blügel,
    Stefan and Gompper, Gerhard and Koch, Erik and Müller-Krumbhaar, Heiner and Spatschek,
    Robert and Winkler, Roland G.Editors}, year={2006}, pages={A5.1-A5.21}, collection={Matter
    and Materials} }'
  chicago: 'Friedrich, Christoph, and Arno Schindlmayr. “Many-Body Perturbation Theory:
    The GW Approximation.” In <i>Computational Condensed Matter Physics</i>, edited
    by Stefan Blügel, Gerhard Gompper, Erik Koch, Heiner Müller-Krumbhaar, Robert
    Spatschek, and Roland G. Winkler, 32:A5.1-A5.21. Matter and Materials. Jülich:
    Forschungszentrum Jülich, 2006.'
  ieee: 'C. Friedrich and A. Schindlmayr, “Many-body perturbation theory: The GW approximation,”
    in <i>Computational Condensed Matter Physics</i>, vol. 32, S. Blügel, G. Gompper,
    E. Koch, H. Müller-Krumbhaar, R. Spatschek, and R. G. Winkler, Eds. Jülich: Forschungszentrum
    Jülich, 2006, p. A5.1-A5.21.'
  mla: 'Friedrich, Christoph, and Arno Schindlmayr. “Many-Body Perturbation Theory:
    The GW Approximation.” <i>Computational Condensed Matter Physics</i>, edited by
    Stefan Blügel et al., vol. 32, Forschungszentrum Jülich, 2006, p. A5.1-A5.21.'
  short: 'C. Friedrich, A. Schindlmayr, in: S. Blügel, G. Gompper, E. Koch, H. Müller-Krumbhaar,
    R. Spatschek, R.G. Winkler (Eds.), Computational Condensed Matter Physics, Forschungszentrum
    Jülich, Jülich, 2006, p. A5.1-A5.21.'
conference:
  end_date: 2006-03-17
  location: Jülich
  name: 37th Spring School of the Institute of Solid State Research
  start_date: 2006-03-06
date_created: 2020-08-28T18:18:37Z
date_updated: 2022-01-06T06:53:43Z
ddc:
- '530'
editor:
- first_name: Stefan
  full_name: Blügel, Stefan
  last_name: Blügel
- first_name: Gerhard
  full_name: Gompper, Gerhard
  last_name: Gompper
- first_name: Erik
  full_name: Koch, Erik
  last_name: Koch
- first_name: Heiner
  full_name: Müller-Krumbhaar, Heiner
  last_name: Müller-Krumbhaar
- first_name: Robert
  full_name: Spatschek, Robert
  last_name: Spatschek
- first_name: Roland G.
  full_name: Winkler, Roland G.
  last_name: Winkler
extern: '1'
file:
- access_level: request
  content_type: application/pdf
  creator: schindlm
  date_created: 2020-08-28T18:28:38Z
  date_updated: 2022-01-06T06:53:43Z
  description: © 2006 Forschungszentrum Jülich
  file_id: '18605'
  file_name: A05friedrich.pdf
  file_size: 846166
  relation: main_file
  title: 'Many-body perturbation theory: The GW approximation'
file_date_updated: 2022-01-06T06:53:43Z
has_accepted_license: '1'
intvolume: '        32'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://hdl.handle.net/2128/2396
oa: '1'
page: A5.1-A5.21
place: Jülich
publication: Computational Condensed Matter Physics
publication_identifier:
  isbn:
  - 3-89336-430-7
  issn:
  - 1433-5506
publication_status: published
publisher: Forschungszentrum Jülich
series_title: Matter and Materials
status: public
title: 'Many-body perturbation theory: The GW approximation'
type: book_chapter
user_id: '458'
volume: 32
year: '2006'
...
---
_id: '18603'
author:
- first_name: Arno
  full_name: Schindlmayr, Arno
  id: '458'
  last_name: Schindlmayr
  orcid: 0000-0002-4855-071X
citation:
  ama: 'Schindlmayr A. Time-dependent density-functional theory. In: Blügel S, Gompper
    G, Koch E, Müller-Krumbhaar H, Spatschek R, Winkler RG, eds. <i>Computational
    Condensed Matter Physics</i>. Vol 32. Matter and Materials. Jülich: Forschungszentrum
    Jülich; 2006:A4.1-A4.19.'
  apa: 'Schindlmayr, A. (2006). Time-dependent density-functional theory. In S. Blügel,
    G. Gompper, E. Koch, H. Müller-Krumbhaar, R. Spatschek, &#38; R. G. Winkler (Eds.),
    <i>Computational Condensed Matter Physics</i> (Vol. 32, p. A4.1-A4.19). Jülich:
    Forschungszentrum Jülich.'
  bibtex: '@inbook{Schindlmayr_2006, place={Jülich}, series={Matter and Materials},
    title={Time-dependent density-functional theory}, volume={32}, booktitle={Computational
    Condensed Matter Physics}, publisher={Forschungszentrum Jülich}, author={Schindlmayr,
    Arno}, editor={Blügel, Stefan and Gompper, Gerhard and Koch, Erik and Müller-Krumbhaar,
    Heiner and Spatschek, Robert and Winkler, Roland G.Editors}, year={2006}, pages={A4.1-A4.19},
    collection={Matter and Materials} }'
  chicago: 'Schindlmayr, Arno. “Time-Dependent Density-Functional Theory.” In <i>Computational
    Condensed Matter Physics</i>, edited by Stefan Blügel, Gerhard Gompper, Erik Koch,
    Heiner Müller-Krumbhaar, Robert Spatschek, and Roland G. Winkler, 32:A4.1-A4.19.
    Matter and Materials. Jülich: Forschungszentrum Jülich, 2006.'
  ieee: 'A. Schindlmayr, “Time-dependent density-functional theory,” in <i>Computational
    Condensed Matter Physics</i>, vol. 32, S. Blügel, G. Gompper, E. Koch, H. Müller-Krumbhaar,
    R. Spatschek, and R. G. Winkler, Eds. Jülich: Forschungszentrum Jülich, 2006,
    p. A4.1-A4.19.'
  mla: Schindlmayr, Arno. “Time-Dependent Density-Functional Theory.” <i>Computational
    Condensed Matter Physics</i>, edited by Stefan Blügel et al., vol. 32, Forschungszentrum
    Jülich, 2006, p. A4.1-A4.19.
  short: 'A. Schindlmayr, in: S. Blügel, G. Gompper, E. Koch, H. Müller-Krumbhaar,
    R. Spatschek, R.G. Winkler (Eds.), Computational Condensed Matter Physics, Forschungszentrum
    Jülich, Jülich, 2006, p. A4.1-A4.19.'
conference:
  end_date: 2006-03-17
  location: Jülich
  name: 37th Spring School of the Institute of Solid State Research
  start_date: 2006-03-06
date_created: 2020-08-28T18:27:40Z
date_updated: 2022-01-06T06:53:43Z
ddc:
- '530'
editor:
- first_name: Stefan
  full_name: Blügel, Stefan
  last_name: Blügel
- first_name: Gerhard
  full_name: Gompper, Gerhard
  last_name: Gompper
- first_name: Erik
  full_name: Koch, Erik
  last_name: Koch
- first_name: Heiner
  full_name: Müller-Krumbhaar, Heiner
  last_name: Müller-Krumbhaar
- first_name: Robert
  full_name: Spatschek, Robert
  last_name: Spatschek
- first_name: Roland G.
  full_name: Winkler, Roland G.
  last_name: Winkler
extern: '1'
file:
- access_level: request
  content_type: application/pdf
  creator: schindlm
  date_created: 2020-08-28T18:27:04Z
  date_updated: 2022-01-06T06:53:43Z
  description: © 2006 Forschungszentrum Jülich
  file_id: '18604'
  file_name: A04schindlmayr.pdf
  file_size: 492168
  relation: main_file
  title: Time-dependent density-functional theory
file_date_updated: 2022-01-06T06:53:43Z
has_accepted_license: '1'
intvolume: '        32'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://hdl.handle.net/2128/2396
oa: '1'
page: A4.1-A4.19
place: Jülich
publication: Computational Condensed Matter Physics
publication_identifier:
  isbn:
  - 3-89336-430-7
  issn:
  - 1433-5506
publication_status: published
publisher: Forschungszentrum Jülich
series_title: Matter and Materials
status: public
title: Time-dependent density-functional theory
type: book_chapter
user_id: '458'
volume: 32
year: '2006'
...
---
_id: '18606'
abstract:
- lang: eng
  text: In this lecture we present many-body perturbation theory as a method to determine
    quasiparticle excitations in solids, especially electronic band structures, accurately
    from first principles. The main ingredient is the electronic self-energy that,
    in principle, contains all many-body exchange and correlation effects beyond the
    Hartree potential. As its exact mathematical expression is unknown, approximations
    must be used in practical calculations. The approximation is obtained using a
    systematic algebraic approach on the basis of Green function techniques. It constitutes
    an expansion of the self-energy up to linear order in the screened Coulomb potential,
    which describes the interaction between the quasiparticles and includes dynamic
    screening through the creation of exchange-correlation holes around the bare particles.
    The implementation of the approximation relies on a perturbative treatment starting
    from density functional theory. Besides a detailed mathematical discussion we
    focus on the underlying physical concepts and show some illustrative applications.
author:
- first_name: Christoph
  full_name: Friedrich, Christoph
  last_name: Friedrich
- first_name: Arno
  full_name: Schindlmayr, Arno
  id: '458'
  last_name: Schindlmayr
  orcid: 0000-0002-4855-071X
citation:
  ama: 'Friedrich C, Schindlmayr A. Many-body perturbation theory: The GW approximation.
    In: Grotendorst J, Blügel S, Marx D, eds. <i>Computational Nanoscience: Do It
    Yourself!</i>. Vol 31. NIC Series. Jülich: John von Neumann Institute for Computing;
    2006:335-355.'
  apa: 'Friedrich, C., &#38; Schindlmayr, A. (2006). Many-body perturbation theory:
    The GW approximation. In J. Grotendorst, S. Blügel, &#38; D. Marx (Eds.), <i>Computational
    Nanoscience: Do It Yourself!</i> (Vol. 31, pp. 335–355). Jülich: John von Neumann
    Institute for Computing.'
  bibtex: '@inbook{Friedrich_Schindlmayr_2006, place={Jülich}, series={NIC Series},
    title={Many-body perturbation theory: The GW approximation}, volume={31}, booktitle={Computational
    Nanoscience: Do It Yourself!}, publisher={John von Neumann Institute for Computing},
    author={Friedrich, Christoph and Schindlmayr, Arno}, editor={Grotendorst, Johannes
    and Blügel, Stefan and Marx, DominikEditors}, year={2006}, pages={335–355}, collection={NIC
    Series} }'
  chicago: 'Friedrich, Christoph, and Arno Schindlmayr. “Many-Body Perturbation Theory:
    The GW Approximation.” In <i>Computational Nanoscience: Do It Yourself!</i>, edited
    by Johannes Grotendorst, Stefan Blügel, and Dominik Marx, 31:335–55. NIC Series.
    Jülich: John von Neumann Institute for Computing, 2006.'
  ieee: 'C. Friedrich and A. Schindlmayr, “Many-body perturbation theory: The GW approximation,”
    in <i>Computational Nanoscience: Do It Yourself!</i>, vol. 31, J. Grotendorst,
    S. Blügel, and D. Marx, Eds. Jülich: John von Neumann Institute for Computing,
    2006, pp. 335–355.'
  mla: 'Friedrich, Christoph, and Arno Schindlmayr. “Many-Body Perturbation Theory:
    The GW Approximation.” <i>Computational Nanoscience: Do It Yourself!</i>, edited
    by Johannes Grotendorst et al., vol. 31, John von Neumann Institute for Computing,
    2006, pp. 335–55.'
  short: 'C. Friedrich, A. Schindlmayr, in: J. Grotendorst, S. Blügel, D. Marx (Eds.),
    Computational Nanoscience: Do It Yourself!, John von Neumann Institute for Computing,
    Jülich, 2006, pp. 335–355.'
conference:
  end_date: 2006-02-22
  location: Jülich
  name: NIC Winter School
  start_date: 2006-02-14
date_created: 2020-08-28T18:43:18Z
date_updated: 2022-01-06T06:53:43Z
ddc:
- '530'
editor:
- first_name: Johannes
  full_name: Grotendorst, Johannes
  last_name: Grotendorst
- first_name: Stefan
  full_name: Blügel, Stefan
  last_name: Blügel
- first_name: Dominik
  full_name: Marx, Dominik
  last_name: Marx
extern: '1'
file:
- access_level: request
  content_type: application/pdf
  creator: schindlm
  date_created: 2020-08-28T18:38:38Z
  date_updated: 2022-01-06T06:53:43Z
  description: © 2006 John von Neumann Institute for Computing
  file_id: '18607'
  file_name: NIC-GW.pdf
  file_size: 317126
  relation: main_file
  title: 'Many-body perturbation theory: The GW approximation'
file_date_updated: 2022-01-06T06:53:43Z
has_accepted_license: '1'
intvolume: '        31'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://hdl.handle.net/2128/4778
oa: '1'
page: 335-355
place: Jülich
publication: 'Computational Nanoscience: Do It Yourself!'
publication_identifier:
  isbn:
  - 3-00-017350-1
publication_status: published
publisher: John von Neumann Institute for Computing
series_title: NIC Series
status: public
title: 'Many-body perturbation theory: The GW approximation'
type: book_chapter
user_id: '458'
volume: 31
year: '2006'
...
---
_id: '2213'
author:
- first_name: Christian
  full_name: Scheideler, Christian
  id: '20792'
  last_name: Scheideler
citation:
  ama: 'Scheideler C. Towards a paradigm for robust distributed algorithms and data
    structures. In: <i>6th International HNI Symposium on New Trends in Parallel and
    Distributed Computing</i>. ; 2006.'
  apa: Scheideler, C. (2006). Towards a paradigm for robust distributed algorithms
    and data structures. In <i>6th International HNI Symposium on New Trends in Parallel
    and Distributed Computing</i>.
  bibtex: '@inproceedings{Scheideler_2006, title={Towards a paradigm for robust distributed
    algorithms and data structures}, booktitle={6th International HNI Symposium on
    New Trends in Parallel and Distributed Computing}, author={Scheideler, Christian},
    year={2006} }'
  chicago: Scheideler, Christian. “Towards a Paradigm for Robust Distributed Algorithms
    and Data Structures.” In <i>6th International HNI Symposium on New Trends in Parallel
    and Distributed Computing</i>, 2006.
  ieee: C. Scheideler, “Towards a paradigm for robust distributed algorithms and data
    structures,” in <i>6th International HNI Symposium on New Trends in Parallel and
    Distributed Computing</i>, 2006.
  mla: Scheideler, Christian. “Towards a Paradigm for Robust Distributed Algorithms
    and Data Structures.” <i>6th International HNI Symposium on New Trends in Parallel
    and Distributed Computing</i>, 2006.
  short: 'C. Scheideler, in: 6th International HNI Symposium on New Trends in Parallel
    and Distributed Computing, 2006.'
date_created: 2018-04-05T07:06:44Z
date_updated: 2022-01-06T06:55:27Z
ddc:
- '040'
department:
- _id: '79'
file:
- access_level: open_access
  content_type: application/pdf
  creator: florida
  date_created: 2018-04-13T09:59:14Z
  date_updated: 2018-04-13T09:59:14Z
  file_id: '2336'
  file_name: HNI-Symposium-06.pdf
  file_size: 85116
  relation: main_file
file_date_updated: 2018-04-13T09:59:14Z
has_accepted_license: '1'
oa: '1'
publication: 6th International HNI Symposium on New Trends in Parallel and Distributed
  Computing
status: public
title: Towards a paradigm for robust distributed algorithms and data structures
type: conference
urn: '22137'
user_id: '15504'
year: '2006'
...
---
_id: '4243'
abstract:
- lang: eng
  text: We investigate the optical properties of a Coulomb-coupled double-quantum
    dot system excited by coherent light pulses. Basic effects of Coulomb coupling
    regarding linear and nonlinear optical processes are discussed. By numerically
    solving the Heisenberg equation of motion we are able to present the temporal
    evolution of the system’s density matrix for a wide range of coupling parameters.
    The two main coupling effects in dipole approximation, biexcitonic shift and Förster
    energy transfer, are investigated and their qualitative and quantitative influence
    on absorption spectra, Rabi oscillations, and single- and two-pulse excitation
    is discussed. We present simulated differential transmission spectra to allow
    for comparison with recent experimental studies.
article_type: original
author:
- first_name: J.
  full_name: Danckwerts, J.
  last_name: Danckwerts
- first_name: K. J.
  full_name: Ahn, K. J.
  last_name: Ahn
- first_name: Jens
  full_name: Förstner, Jens
  id: '158'
  last_name: Förstner
  orcid: 0000-0001-7059-9862
- first_name: A.
  full_name: Knorr, A.
  last_name: Knorr
citation:
  ama: 'Danckwerts J, Ahn KJ, Förstner J, Knorr A. Theory of ultrafast nonlinear optics
    of Coulomb-coupled semiconductor quantum dots: Rabi oscillations and pump-probe
    spectra. <i>Physical Review B</i>. 2006;73(16):165318-165318-18. doi:<a href="https://doi.org/10.1103/physrevb.73.165318">10.1103/physrevb.73.165318</a>'
  apa: 'Danckwerts, J., Ahn, K. J., Förstner, J., &#38; Knorr, A. (2006). Theory of
    ultrafast nonlinear optics of Coulomb-coupled semiconductor quantum dots: Rabi
    oscillations and pump-probe spectra. <i>Physical Review B</i>, <i>73</i>(16),
    165318-165318–18. <a href="https://doi.org/10.1103/physrevb.73.165318">https://doi.org/10.1103/physrevb.73.165318</a>'
  bibtex: '@article{Danckwerts_Ahn_Förstner_Knorr_2006, title={Theory of ultrafast
    nonlinear optics of Coulomb-coupled semiconductor quantum dots: Rabi oscillations
    and pump-probe spectra}, volume={73}, DOI={<a href="https://doi.org/10.1103/physrevb.73.165318">10.1103/physrevb.73.165318</a>},
    number={16}, journal={Physical Review B}, publisher={American Physical Society
    (APS)}, author={Danckwerts, J. and Ahn, K. J. and Förstner, Jens and Knorr, A.},
    year={2006}, pages={165318-165318–18} }'
  chicago: 'Danckwerts, J., K. J. Ahn, Jens Förstner, and A. Knorr. “Theory of Ultrafast
    Nonlinear Optics of Coulomb-Coupled Semiconductor Quantum Dots: Rabi Oscillations
    and Pump-Probe Spectra.” <i>Physical Review B</i> 73, no. 16 (2006): 165318-165318–18.
    <a href="https://doi.org/10.1103/physrevb.73.165318">https://doi.org/10.1103/physrevb.73.165318</a>.'
  ieee: 'J. Danckwerts, K. J. Ahn, J. Förstner, and A. Knorr, “Theory of ultrafast
    nonlinear optics of Coulomb-coupled semiconductor quantum dots: Rabi oscillations
    and pump-probe spectra,” <i>Physical Review B</i>, vol. 73, no. 16, pp. 165318-165318–18,
    2006.'
  mla: 'Danckwerts, J., et al. “Theory of Ultrafast Nonlinear Optics of Coulomb-Coupled
    Semiconductor Quantum Dots: Rabi Oscillations and Pump-Probe Spectra.” <i>Physical
    Review B</i>, vol. 73, no. 16, American Physical Society (APS), 2006, pp. 165318-165318–18,
    doi:<a href="https://doi.org/10.1103/physrevb.73.165318">10.1103/physrevb.73.165318</a>.'
  short: J. Danckwerts, K.J. Ahn, J. Förstner, A. Knorr, Physical Review B 73 (2006)
    165318-165318–18.
date_created: 2018-08-29T08:30:58Z
date_updated: 2022-01-06T07:00:41Z
ddc:
- '530'
doi: 10.1103/physrevb.73.165318
extern: '1'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hclaudia
  date_created: 2018-08-29T08:33:00Z
  date_updated: 2018-09-04T19:59:29Z
  file_id: '4245'
  file_name: 2006 Danckwerts,Ahn,Förster,Knorr_Theory of ultrafast nonlinear optics
    of Coulomb-coupled semiconductor quantum dots Rabi oscillations and pump-probe
    spectra.pdf
  file_size: 254366
  relation: main_file
file_date_updated: 2018-09-04T19:59:29Z
has_accepted_license: '1'
intvolume: '        73'
issue: '16'
keyword:
- tet_topic_qd
language:
- iso: eng
oa: '1'
page: 165318-165318-18
publication: Physical Review B
publication_identifier:
  issn:
  - 1098-0121
  - 1550-235X
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Theory of ultrafast nonlinear optics of Coulomb-coupled semiconductor quantum
  dots: Rabi oscillations and pump-probe spectra'
type: journal_article
urn: '42430'
user_id: '158'
volume: 73
year: '2006'
...
---
_id: '5659'
abstract:
- lang: eng
  text: Spam e-mails have become a serious technological and economic problem. So
    far we have been reasonably able to resist spam e-mails and use the Internet for
    regular communication by deploying complementary anti-spam approaches. However,
    if we are to avert the danger of losing the Internet email service as a valuable,
    free, and worldwide medium of open communication, anti-spam activities should
    be performed more systematically than is done in current, mainly heuristic, anti-spam
    approaches. A formal framework within which the modes of spam delivery, anti-spam
    approaches, and their effectiveness can be investigated, may encourage a shift
    in methodology and pave the way for new, holistic anti-spam approaches. This paper
    presents a model of the Internet e-mail infrastructure as a directed graph and
    a deterministic finite automaton, and draws on automata theory to formally derive
    the modes of spam delivery possible. Finally the effectiveness of anti-spam approaches
    in terms of coverage of spamming modes is assessed.
author:
- first_name: Guido
  full_name: Schryen, Guido
  id: '72850'
  last_name: Schryen
citation:
  ama: 'Schryen G. A formal approach towards assessing the effectiveness of anti-spam
    procedures. In: <i>39th Annual Hawaii International Conference on System Sciences</i>.
    ; 2006.'
  apa: Schryen, G. (2006). A formal approach towards assessing the effectiveness of
    anti-spam procedures. In <i>39th Annual Hawaii International Conference on System
    Sciences</i>.
  bibtex: '@inproceedings{Schryen_2006, title={A formal approach towards assessing
    the effectiveness of anti-spam procedures}, booktitle={39th Annual Hawaii International
    Conference on System Sciences}, author={Schryen, Guido}, year={2006} }'
  chicago: Schryen, Guido. “A Formal Approach towards Assessing the Effectiveness
    of Anti-Spam Procedures.” In <i>39th Annual Hawaii International Conference on
    System Sciences</i>, 2006.
  ieee: G. Schryen, “A formal approach towards assessing the effectiveness of anti-spam
    procedures,” in <i>39th Annual Hawaii International Conference on System Sciences</i>,
    2006.
  mla: Schryen, Guido. “A Formal Approach towards Assessing the Effectiveness of Anti-Spam
    Procedures.” <i>39th Annual Hawaii International Conference on System Sciences</i>,
    2006.
  short: 'G. Schryen, in: 39th Annual Hawaii International Conference on System Sciences,
    2006.'
date_created: 2018-11-14T14:54:44Z
date_updated: 2022-01-06T07:02:22Z
ddc:
- '000'
department:
- _id: '277'
extern: '1'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hsiemes
  date_created: 2018-12-18T13:29:29Z
  date_updated: 2018-12-18T13:29:29Z
  file_id: '6327'
  file_name: Conference Version - A formal approach towards assessing the effectiveness
    of anti spam approaches.pdf
  file_size: 176033
  relation: main_file
file_date_updated: 2018-12-18T13:29:29Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
publication: 39th Annual Hawaii International Conference on System Sciences
status: public
title: A formal approach towards assessing the effectiveness of anti-spam procedures
type: conference
user_id: '61579'
year: '2006'
...
---
_id: '11823'
abstract:
- lang: eng
  text: In this study we evaluate transmission error compensation techniques for distributed
    speech recognition systems based on modification of the speech decoder. The candidates
    are marginalization, weighted Viterbi and our recently proposed soft-feature uncertainty
    decoding. For the latter, it is shown how the Bayesian speech recognition approach
    must be reformulated for recognition at the server side. The resulting predictive
    classifier is able to take account of the transmission errors by changing the
    contribution of the affected speech features to the acoustic score. The comparison
    of the experimental results has proven the superiority of our approach.
author:
- first_name: Valentin
  full_name: Ion, Valentin
  last_name: Ion
- first_name: Reinhold
  full_name: Haeb-Umbach, Reinhold
  id: '242'
  last_name: Haeb-Umbach
citation:
  ama: 'Ion V, Haeb-Umbach R. Comparison of Decoder-based Transmission Error Compensation
    Techniques for Distributed Speech Recognition. In: <i>7. ITG-Fachtagung Sprachkommunikation</i>.
    ; 2006.'
  apa: Ion, V., &#38; Haeb-Umbach, R. (2006). Comparison of Decoder-based Transmission
    Error Compensation Techniques for Distributed Speech Recognition. In <i>7. ITG-Fachtagung
    Sprachkommunikation</i>.
  bibtex: '@inproceedings{Ion_Haeb-Umbach_2006, title={Comparison of Decoder-based
    Transmission Error Compensation Techniques for Distributed Speech Recognition},
    booktitle={7. ITG-Fachtagung Sprachkommunikation}, author={Ion, Valentin and Haeb-Umbach,
    Reinhold}, year={2006} }'
  chicago: Ion, Valentin, and Reinhold Haeb-Umbach. “Comparison of Decoder-Based Transmission
    Error Compensation Techniques for Distributed Speech Recognition.” In <i>7. ITG-Fachtagung
    Sprachkommunikation</i>, 2006.
  ieee: V. Ion and R. Haeb-Umbach, “Comparison of Decoder-based Transmission Error
    Compensation Techniques for Distributed Speech Recognition,” in <i>7. ITG-Fachtagung
    Sprachkommunikation</i>, 2006.
  mla: Ion, Valentin, and Reinhold Haeb-Umbach. “Comparison of Decoder-Based Transmission
    Error Compensation Techniques for Distributed Speech Recognition.” <i>7. ITG-Fachtagung
    Sprachkommunikation</i>, 2006.
  short: 'V. Ion, R. Haeb-Umbach, in: 7. ITG-Fachtagung Sprachkommunikation, 2006.'
date_created: 2019-07-12T05:28:56Z
date_updated: 2022-01-06T06:51:10Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://groups.uni-paderborn.de/nt/pubs/2006/IoHa06-1.pdf
oa: '1'
publication: 7. ITG-Fachtagung Sprachkommunikation
status: public
title: Comparison of Decoder-based Transmission Error Compensation Techniques for
  Distributed Speech Recognition
type: conference
user_id: '44006'
year: '2006'
...
---
_id: '11824'
abstract:
- lang: eng
  text: Soft-feature based speech recognition, which is an example of uncertainty
    decoding, has been proven to be a robust error mitigation method for distributed
    speech recognition over wireless channels exhibiting bit errors. In this paper
    we extend this concept to packet-oriented transmissions. The a posteriori probability
    density function of the lost feature vector, given the closest received neighbours,
    is computed. In the experiments, the nearest frame repetition, which is shown
    to be equivalent to the MAP estimate, outperforms the MMSE estimate for long bursts.
    Taking the variance into account at the speech recognition stage results in superior
    performance compared to classical schemes using point estimates. A computationally
    and memory efficient implementation of the proposed packet loss compensation scheme
    based on table lookup is presented
author:
- first_name: Valentin
  full_name: Ion, Valentin
  last_name: Ion
- first_name: Reinhold
  full_name: Haeb-Umbach, Reinhold
  id: '242'
  last_name: Haeb-Umbach
citation:
  ama: 'Ion V, Haeb-Umbach R. An Inexpensive Packet Loss Compensation Scheme for Distributed
    Speech Recognition Based on Soft-Features. In: <i>IEEE International Conference
    on Acoustics, Speech and Signal Processing (ICASSP 2006)</i>. Vol 1. ; 2006:I.
    doi:<a href="https://doi.org/10.1109/ICASSP.2006.1659984">10.1109/ICASSP.2006.1659984</a>'
  apa: Ion, V., &#38; Haeb-Umbach, R. (2006). An Inexpensive Packet Loss Compensation
    Scheme for Distributed Speech Recognition Based on Soft-Features. In <i>IEEE International
    Conference on Acoustics, Speech and Signal Processing (ICASSP 2006)</i> (Vol.
    1, p. I). <a href="https://doi.org/10.1109/ICASSP.2006.1659984">https://doi.org/10.1109/ICASSP.2006.1659984</a>
  bibtex: '@inproceedings{Ion_Haeb-Umbach_2006, title={An Inexpensive Packet Loss
    Compensation Scheme for Distributed Speech Recognition Based on Soft-Features},
    volume={1}, DOI={<a href="https://doi.org/10.1109/ICASSP.2006.1659984">10.1109/ICASSP.2006.1659984</a>},
    booktitle={IEEE International Conference on Acoustics, Speech and Signal Processing
    (ICASSP 2006)}, author={Ion, Valentin and Haeb-Umbach, Reinhold}, year={2006},
    pages={I} }'
  chicago: Ion, Valentin, and Reinhold Haeb-Umbach. “An Inexpensive Packet Loss Compensation
    Scheme for Distributed Speech Recognition Based on Soft-Features.” In <i>IEEE
    International Conference on Acoustics, Speech and Signal Processing (ICASSP 2006)</i>,
    1:I, 2006. <a href="https://doi.org/10.1109/ICASSP.2006.1659984">https://doi.org/10.1109/ICASSP.2006.1659984</a>.
  ieee: V. Ion and R. Haeb-Umbach, “An Inexpensive Packet Loss Compensation Scheme
    for Distributed Speech Recognition Based on Soft-Features,” in <i>IEEE International
    Conference on Acoustics, Speech and Signal Processing (ICASSP 2006)</i>, 2006,
    vol. 1, p. I.
  mla: Ion, Valentin, and Reinhold Haeb-Umbach. “An Inexpensive Packet Loss Compensation
    Scheme for Distributed Speech Recognition Based on Soft-Features.” <i>IEEE International
    Conference on Acoustics, Speech and Signal Processing (ICASSP 2006)</i>, vol.
    1, 2006, p. I, doi:<a href="https://doi.org/10.1109/ICASSP.2006.1659984">10.1109/ICASSP.2006.1659984</a>.
  short: 'V. Ion, R. Haeb-Umbach, in: IEEE International Conference on Acoustics,
    Speech and Signal Processing (ICASSP 2006), 2006, p. I.'
date_created: 2019-07-12T05:28:58Z
date_updated: 2022-01-06T06:51:10Z
department:
- _id: '54'
doi: 10.1109/ICASSP.2006.1659984
intvolume: '         1'
keyword:
- distributed speech recognition
- least mean squares methods
- MAP estimate
- maximum likelihood estimation
- MMSE estimate
- packet loss compensation scheme
- packet switched communication
- posteriori probability density function
- robust error mitigation method
- soft-features
- speech recognition
- table lookup
- voice communication
- wireless channels
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://groups.uni-paderborn.de/nt/pubs/2006/IoHa06-2.pdf
oa: '1'
page: I
publication: IEEE International Conference on Acoustics, Speech and Signal Processing
  (ICASSP 2006)
status: public
title: An Inexpensive Packet Loss Compensation Scheme for Distributed Speech Recognition
  Based on Soft-Features
type: conference
user_id: '44006'
volume: 1
year: '2006'
...
---
_id: '11825'
abstract:
- lang: eng
  text: In this paper, we propose an enhanced error concealment strategy at the server
    side of a distributed speech recognition (DSR) system, which is fully compatible
    with the existing DSR standard. It is based on a Bayesian approach, where the
    a posteriori probability density of the error-free feature vector is computed,
    given all received feature vectors which are possibly corrupted by transmission
    errors. Rather than computing a point estimate, such as the MMSE estimate, and
    plugging it into the Bayesian decision rule, we employ uncertainty decoding, which
    results in an integration over the uncertainty in the feature domain. In a typical
    scenario the communication between the thin client, often a mobile device, and
    the recognition server spreads across heterogeneous networks. Both bit errors
    on circuit-switched links and lost data packets on IP connections are mitigated
    by our approach in a unified manner. The experiments reveal improved robustness
    both for small- and large-vocabulary recognition tasks.
author:
- first_name: Valentin
  full_name: Ion, Valentin
  last_name: Ion
- first_name: Reinhold
  full_name: Haeb-Umbach, Reinhold
  id: '242'
  last_name: Haeb-Umbach
citation:
  ama: Ion V, Haeb-Umbach R. Uncertainty decoding for distributed speech recognition
    over error-prone networks. <i>Speech Communication</i>. 2006;48(11):1435-1446.
    doi:<a href="https://doi.org/10.1016/j.specom.2006.03.007">10.1016/j.specom.2006.03.007</a>
  apa: Ion, V., &#38; Haeb-Umbach, R. (2006). Uncertainty decoding for distributed
    speech recognition over error-prone networks. <i>Speech Communication</i>, <i>48</i>(11),
    1435–1446. <a href="https://doi.org/10.1016/j.specom.2006.03.007">https://doi.org/10.1016/j.specom.2006.03.007</a>
  bibtex: '@article{Ion_Haeb-Umbach_2006, title={Uncertainty decoding for distributed
    speech recognition over error-prone networks}, volume={48}, DOI={<a href="https://doi.org/10.1016/j.specom.2006.03.007">10.1016/j.specom.2006.03.007</a>},
    number={11}, journal={Speech Communication}, author={Ion, Valentin and Haeb-Umbach,
    Reinhold}, year={2006}, pages={1435–1446} }'
  chicago: 'Ion, Valentin, and Reinhold Haeb-Umbach. “Uncertainty Decoding for Distributed
    Speech Recognition over Error-Prone Networks.” <i>Speech Communication</i> 48,
    no. 11 (2006): 1435–46. <a href="https://doi.org/10.1016/j.specom.2006.03.007">https://doi.org/10.1016/j.specom.2006.03.007</a>.'
  ieee: V. Ion and R. Haeb-Umbach, “Uncertainty decoding for distributed speech recognition
    over error-prone networks,” <i>Speech Communication</i>, vol. 48, no. 11, pp.
    1435–1446, 2006.
  mla: Ion, Valentin, and Reinhold Haeb-Umbach. “Uncertainty Decoding for Distributed
    Speech Recognition over Error-Prone Networks.” <i>Speech Communication</i>, vol.
    48, no. 11, 2006, pp. 1435–46, doi:<a href="https://doi.org/10.1016/j.specom.2006.03.007">10.1016/j.specom.2006.03.007</a>.
  short: V. Ion, R. Haeb-Umbach, Speech Communication 48 (2006) 1435–1446.
date_created: 2019-07-12T05:28:59Z
date_updated: 2022-01-06T06:51:10Z
department:
- _id: '54'
doi: 10.1016/j.specom.2006.03.007
intvolume: '        48'
issue: '11'
keyword:
- Channel error robustness
- Distributed speech recognition
- Soft features
- Uncertainty decoding
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://groups.uni-paderborn.de/nt/pubs/2006/IoHa06-3.pdf
oa: '1'
page: 1435-1446
publication: Speech Communication
status: public
title: Uncertainty decoding for distributed speech recognition over error-prone networks
type: journal_article
user_id: '44006'
volume: 48
year: '2006'
...
---
_id: '11826'
abstract:
- lang: eng
  text: The accuracy of distributed speech recognition has been shown to be very sensitive
    to errors occurring during transmission. One reason for this is that the classifier,
    usually trained under error free conditions, is unable to cope with the mismatch
    between an error free and error prone channel. In this paper we present a novel
    decision rule for classification which is able to account for channel errors.
    To achieve this, the classical Bayesian speech recognition approach has been reformulated
    for the server side, where the observation is known only to the extent, as is
    given by its a posteriori density function. We present a method to estimate the
    a posteriori density which is based on a Markov model of the source, which captures
    correlations of both static and dynamic features. A practical implementation is
    given, accompanied by experimental results for distributed speech recognition
    over an IP-network.
author:
- first_name: Valentin
  full_name: Ion, Valentin
  last_name: Ion
- first_name: Reinhold
  full_name: Haeb-Umbach, Reinhold
  id: '242'
  last_name: Haeb-Umbach
citation:
  ama: 'Ion V, Haeb-Umbach R. Improved Source Modeling and Predictive Classification
    for Channel Robust Speech Recognition. In: <i>Interspeech 2006</i>. ; 2006.'
  apa: Ion, V., &#38; Haeb-Umbach, R. (2006). Improved Source Modeling and Predictive
    Classification for Channel Robust Speech Recognition. In <i>Interspeech 2006</i>.
  bibtex: '@inproceedings{Ion_Haeb-Umbach_2006, title={Improved Source Modeling and
    Predictive Classification for Channel Robust Speech Recognition}, booktitle={Interspeech
    2006}, author={Ion, Valentin and Haeb-Umbach, Reinhold}, year={2006} }'
  chicago: Ion, Valentin, and Reinhold Haeb-Umbach. “Improved Source Modeling and
    Predictive Classification for Channel Robust Speech Recognition.” In <i>Interspeech
    2006</i>, 2006.
  ieee: V. Ion and R. Haeb-Umbach, “Improved Source Modeling and Predictive Classification
    for Channel Robust Speech Recognition,” in <i>Interspeech 2006</i>, 2006.
  mla: Ion, Valentin, and Reinhold Haeb-Umbach. “Improved Source Modeling and Predictive
    Classification for Channel Robust Speech Recognition.” <i>Interspeech 2006</i>,
    2006.
  short: 'V. Ion, R. Haeb-Umbach, in: Interspeech 2006, 2006.'
date_created: 2019-07-12T05:29:00Z
date_updated: 2022-01-06T06:51:10Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://groups.uni-paderborn.de/nt/pubs/2006/IoSc06.pdf
oa: '1'
publication: Interspeech 2006
status: public
title: Improved Source Modeling and Predictive Classification for Channel Robust Speech
  Recognition
type: conference
user_id: '44006'
year: '2006'
...
---
_id: '11884'
abstract:
- lang: eng
  text: In this paper we present the design of a particle filter for post filtering
    instantaneous positioning estimates of GSM mobile terminals. The instantaneous
    estimates are obtained by comparing signal power levels, which are reported by
    the mobile terminal to the base station, with a database of predictions using
    a novel statistically motivated similarity measure. Unlike a simple Euclidian
    distance measure, the proposed scheme incorporates inherent information about
    signal power level measurements requested by the serving base station but not
    reported by the mobile terminal. Furthermore, we show how the Monte Carlo method
    of particle filtering helps to obtain better position estimates and, surprisingly,
    also helps to reduce the computational complexity. Results are presented for real
    field data.
author:
- first_name: Sven
  full_name: Peschke, Sven
  last_name: Peschke
- first_name: Reinhold
  full_name: Haeb-Umbach, Reinhold
  id: '242'
  last_name: Haeb-Umbach
citation:
  ama: 'Peschke S, Haeb-Umbach R. A Probabilistic Similarity Measure and a Non-Linear
    Post-Filter for Mobile Phone Positioning using GSM Signal Power Measurements.
    In: <i>European Navigation Conference \&#38; Exhibition (ENC 2006)</i>. ; 2006.'
  apa: Peschke, S., &#38; Haeb-Umbach, R. (2006). A Probabilistic Similarity Measure
    and a Non-Linear Post-Filter for Mobile Phone Positioning using GSM Signal Power
    Measurements. In <i>European Navigation Conference \&#38; Exhibition (ENC 2006)</i>.
  bibtex: '@inproceedings{Peschke_Haeb-Umbach_2006, title={A Probabilistic Similarity
    Measure and a Non-Linear Post-Filter for Mobile Phone Positioning using GSM Signal
    Power Measurements}, booktitle={European Navigation Conference \&#38; Exhibition
    (ENC 2006)}, author={Peschke, Sven and Haeb-Umbach, Reinhold}, year={2006} }'
  chicago: Peschke, Sven, and Reinhold Haeb-Umbach. “A Probabilistic Similarity Measure
    and a Non-Linear Post-Filter for Mobile Phone Positioning Using GSM Signal Power
    Measurements.” In <i>European Navigation Conference \&#38; Exhibition (ENC 2006)</i>,
    2006.
  ieee: S. Peschke and R. Haeb-Umbach, “A Probabilistic Similarity Measure and a Non-Linear
    Post-Filter for Mobile Phone Positioning using GSM Signal Power Measurements,”
    in <i>European Navigation Conference \&#38; Exhibition (ENC 2006)</i>, 2006.
  mla: Peschke, Sven, and Reinhold Haeb-Umbach. “A Probabilistic Similarity Measure
    and a Non-Linear Post-Filter for Mobile Phone Positioning Using GSM Signal Power
    Measurements.” <i>European Navigation Conference \&#38; Exhibition (ENC 2006)</i>,
    2006.
  short: 'S. Peschke, R. Haeb-Umbach, in: European Navigation Conference \&#38; Exhibition
    (ENC 2006), 2006.'
date_created: 2019-07-12T05:30:07Z
date_updated: 2022-01-06T06:51:11Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://groups.uni-paderborn.de/nt/pubs/2006/PeHa06.pdf
oa: '1'
publication: European Navigation Conference \& Exhibition (ENC 2006)
status: public
title: A Probabilistic Similarity Measure and a Non-Linear Post-Filter for Mobile
  Phone Positioning using GSM Signal Power Measurements
type: conference
user_id: '44006'
year: '2006'
...
---
_id: '11885'
abstract:
- lang: eng
  text: In this paper we present a novel and statistically motivated similarity measure
    for database assisted positioning of GSM mobile terminals by evaluating signal
    power level reports which are transmitted regulary. Unlike a simple Euclidian
    distance measure, the proposed scheme incorporates inherent information about
    signal power level measurements requested by the serving base station but not
    reported by the mobile terminal. Furthermore we show how the Monte Carlo method
    of nonlinear post filtering using particle filtering helps to obtain better position
    estimates and surprisingly also helps to reduce the computational complexity.
    Results are presented for real field data.
author:
- first_name: Sven
  full_name: Peschke, Sven
  last_name: Peschke
- first_name: Reinhold
  full_name: Haeb-Umbach, Reinhold
  id: '242'
  last_name: Haeb-Umbach
citation:
  ama: 'Peschke S, Haeb-Umbach R. Particle Filtering of Database assisted Positioning
    Estimates using a novel Similarity Measure for GSM Signal Power Level Measurements.
    In: <i>3rd Workshop on Positioning Navigation and Communication (WPNC 2006)</i>.
    ; 2006.'
  apa: Peschke, S., &#38; Haeb-Umbach, R. (2006). Particle Filtering of Database assisted
    Positioning Estimates using a novel Similarity Measure for GSM Signal Power Level
    Measurements. In <i>3rd Workshop on Positioning Navigation and Communication (WPNC
    2006)</i>.
  bibtex: '@inproceedings{Peschke_Haeb-Umbach_2006, title={Particle Filtering of Database
    assisted Positioning Estimates using a novel Similarity Measure for GSM Signal
    Power Level Measurements}, booktitle={3rd Workshop on Positioning Navigation and
    Communication (WPNC 2006)}, author={Peschke, Sven and Haeb-Umbach, Reinhold},
    year={2006} }'
  chicago: Peschke, Sven, and Reinhold Haeb-Umbach. “Particle Filtering of Database
    Assisted Positioning Estimates Using a Novel Similarity Measure for GSM Signal
    Power Level Measurements.” In <i>3rd Workshop on Positioning Navigation and Communication
    (WPNC 2006)</i>, 2006.
  ieee: S. Peschke and R. Haeb-Umbach, “Particle Filtering of Database assisted Positioning
    Estimates using a novel Similarity Measure for GSM Signal Power Level Measurements,”
    in <i>3rd Workshop on Positioning Navigation and Communication (WPNC 2006)</i>,
    2006.
  mla: Peschke, Sven, and Reinhold Haeb-Umbach. “Particle Filtering of Database Assisted
    Positioning Estimates Using a Novel Similarity Measure for GSM Signal Power Level
    Measurements.” <i>3rd Workshop on Positioning Navigation and Communication (WPNC
    2006)</i>, 2006.
  short: 'S. Peschke, R. Haeb-Umbach, in: 3rd Workshop on Positioning Navigation and
    Communication (WPNC 2006), 2006.'
date_created: 2019-07-12T05:30:08Z
date_updated: 2022-01-06T06:51:11Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://groups.uni-paderborn.de/nt/pubs/2006/PeHa06-1.pdf
oa: '1'
publication: 3rd Workshop on Positioning Navigation and Communication (WPNC 2006)
status: public
title: Particle Filtering of Database assisted Positioning Estimates using a novel
  Similarity Measure for GSM Signal Power Level Measurements
type: conference
user_id: '44006'
year: '2006'
...
---
_id: '11928'
abstract:
- lang: eng
  text: 'Broadband adaptive beamformers, which use a narrowband SNR-maximization optimization
    criterion for noise reduction, typically cause distortions of the desired speech
    signal at the beamformer output. In this paper two methods are investigated to
    control the speech distortion by comparing the eigenvector beamformer with a maximum
    likelihood beamformer: One is an analytic solution for the ideal case of absence
    of reverberation and the other one is a statistically motivated approach. We use
    the recently introduced gradient-ascent algorithm for adaptive principal eigenvector
    beamforming and then normalize the filter coefficients by the proposed distortion
    control methods. Experimental results in terms of the achievable SNR gain and
    a perceptual speech quality measure are given for the normalized eigenvector beamformer
    and are compared to standard beamforming methods.'
author:
- first_name: Ernst
  full_name: Warsitz, Ernst
  last_name: Warsitz
- first_name: Reinhold
  full_name: Haeb-Umbach, Reinhold
  id: '242'
  last_name: Haeb-Umbach
citation:
  ama: 'Warsitz E, Haeb-Umbach R. Mehrkanalige Sprachsignalverarbeitung durch adaptives
    Eigenbeamforming fuer Freisprecheinrichtungen im Kraftfahrzeug. In: <i>32. Deutsche
    Jahrestagung Fuer Akustik (DAGA 2006)</i>. ; 2006.'
  apa: Warsitz, E., &#38; Haeb-Umbach, R. (2006). Mehrkanalige Sprachsignalverarbeitung
    durch adaptives Eigenbeamforming fuer Freisprecheinrichtungen im Kraftfahrzeug.
    In <i>32. Deutsche Jahrestagung fuer Akustik (DAGA 2006)</i>.
  bibtex: '@inproceedings{Warsitz_Haeb-Umbach_2006, title={Mehrkanalige Sprachsignalverarbeitung
    durch adaptives Eigenbeamforming fuer Freisprecheinrichtungen im Kraftfahrzeug},
    booktitle={32. Deutsche Jahrestagung fuer Akustik (DAGA 2006)}, author={Warsitz,
    Ernst and Haeb-Umbach, Reinhold}, year={2006} }'
  chicago: Warsitz, Ernst, and Reinhold Haeb-Umbach. “Mehrkanalige Sprachsignalverarbeitung
    Durch Adaptives Eigenbeamforming Fuer Freisprecheinrichtungen Im Kraftfahrzeug.”
    In <i>32. Deutsche Jahrestagung Fuer Akustik (DAGA 2006)</i>, 2006.
  ieee: E. Warsitz and R. Haeb-Umbach, “Mehrkanalige Sprachsignalverarbeitung durch
    adaptives Eigenbeamforming fuer Freisprecheinrichtungen im Kraftfahrzeug,” in
    <i>32. Deutsche Jahrestagung fuer Akustik (DAGA 2006)</i>, 2006.
  mla: Warsitz, Ernst, and Reinhold Haeb-Umbach. “Mehrkanalige Sprachsignalverarbeitung
    Durch Adaptives Eigenbeamforming Fuer Freisprecheinrichtungen Im Kraftfahrzeug.”
    <i>32. Deutsche Jahrestagung Fuer Akustik (DAGA 2006)</i>, 2006.
  short: 'E. Warsitz, R. Haeb-Umbach, in: 32. Deutsche Jahrestagung Fuer Akustik (DAGA
    2006), 2006.'
date_created: 2019-07-12T05:30:58Z
date_updated: 2022-01-06T06:51:12Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://groups.uni-paderborn.de/nt/pubs/2006/WaHa06-1.pdf
oa: '1'
publication: 32. Deutsche Jahrestagung fuer Akustik (DAGA 2006)
status: public
title: Mehrkanalige Sprachsignalverarbeitung durch adaptives Eigenbeamforming fuer
  Freisprecheinrichtungen im Kraftfahrzeug
type: conference
user_id: '44006'
year: '2006'
...
---
_id: '11929'
abstract:
- lang: eng
  text: 'Broadband adaptive beamformers, which use a narrowband SNR-maximization optimization
    criterion for noise reduction, typically cause distortions of the desired speech
    signal at the beamformer output. In this paper two methodsare investigated to
    control the speech distortion by comparing the eigenvector beamformer with a maximum
    likelihood beamformer: One is an analytic solution for the ideal case of absence
    of reverberation and the other one is a statistically motivated approach. We use
    the recently introduced gradient-ascent algorithm for adaptive principal eigenvector
    beamforming and then normalize the filter coefficient s by the proposed distortion
    control methods. Experimental results in terms of the achievable SNR gain and
    a perceptual speech quality measure are given for the normalized eigenvector beamformer
    and are compared to standard beamforming methods.'
author:
- first_name: Ernst
  full_name: Warsitz, Ernst
  last_name: Warsitz
- first_name: Reinhold
  full_name: Haeb-Umbach, Reinhold
  id: '242'
  last_name: Haeb-Umbach
citation:
  ama: 'Warsitz E, Haeb-Umbach R. Controlling Speech Distortion in Adaptive Frequency-Domain
    Principal Eigenvector Beamforming. In: <i>International Workshop on Acoustic Echo
    and Noise Control (IWAENC 2006)</i>. ; 2006.'
  apa: Warsitz, E., &#38; Haeb-Umbach, R. (2006). Controlling Speech Distortion in
    Adaptive Frequency-Domain Principal Eigenvector Beamforming. In <i>International
    Workshop on Acoustic Echo and Noise Control (IWAENC 2006)</i>.
  bibtex: '@inproceedings{Warsitz_Haeb-Umbach_2006, title={Controlling Speech Distortion
    in Adaptive Frequency-Domain Principal Eigenvector Beamforming}, booktitle={International
    Workshop on Acoustic Echo and Noise Control (IWAENC 2006)}, author={Warsitz, Ernst
    and Haeb-Umbach, Reinhold}, year={2006} }'
  chicago: Warsitz, Ernst, and Reinhold Haeb-Umbach. “Controlling Speech Distortion
    in Adaptive Frequency-Domain Principal Eigenvector Beamforming.” In <i>International
    Workshop on Acoustic Echo and Noise Control (IWAENC 2006)</i>, 2006.
  ieee: E. Warsitz and R. Haeb-Umbach, “Controlling Speech Distortion in Adaptive
    Frequency-Domain Principal Eigenvector Beamforming,” in <i>International Workshop
    on Acoustic Echo and Noise Control (IWAENC 2006)</i>, 2006.
  mla: Warsitz, Ernst, and Reinhold Haeb-Umbach. “Controlling Speech Distortion in
    Adaptive Frequency-Domain Principal Eigenvector Beamforming.” <i>International
    Workshop on Acoustic Echo and Noise Control (IWAENC 2006)</i>, 2006.
  short: 'E. Warsitz, R. Haeb-Umbach, in: International Workshop on Acoustic Echo
    and Noise Control (IWAENC 2006), 2006.'
date_created: 2019-07-12T05:30:59Z
date_updated: 2022-01-06T06:51:12Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://groups.uni-paderborn.de/nt/pubs/2006/WaHa06-2.pdf
oa: '1'
publication: International Workshop on Acoustic Echo and Noise Control (IWAENC 2006)
status: public
title: Controlling Speech Distortion in Adaptive Frequency-Domain Principal Eigenvector
  Beamforming
type: conference
user_id: '44006'
year: '2006'
...
---
_id: '11942'
abstract:
- lang: eng
  text: Es wird ein marginalisiertes Partikelfilter beschrieben, das zur einkanaligen
    Sprachsignalverbesserung mit einem nichtlinearen dynamischen Zustandsmodell eingesetzt
    werden soll. Das System besteht aus einem Partikelfilter zum Tracking von LSP-Parametern
    und einem Kalman-Filter fuer jedes Partikel, das zur Sprachsignalverbesserung
    verwendet wird. In unserem Ansatz wird angenommen, dass die Parameter in kurzen
    Sprachsignalbloecken konstant sind, waehrend das Sprachsignal sich mit jedem Abtastwert
    aendert. Bei weissem Rauschen werden aehnliche SNR-Gewinne wie mit einem Kalman-EM-iterative
    Algorithmus erzielt, waehrend das Hintergrundrauschen und die Log-spektrale Distanz
    etwas geringer sind. Mit einem erweiterten Zustandsmodell wurden auch Untersuchungen
    fuer farbiges Rauschen durchgefuehrt.
author:
- first_name: Stefan
  full_name: Windmann, Stefan
  last_name: Windmann
- first_name: Reinhold
  full_name: Haeb-Umbach, Reinhold
  id: '242'
  last_name: Haeb-Umbach
citation:
  ama: 'Windmann S, Haeb-Umbach R. Einkanalige Sprachsignalverbesserung mit Hilfe
    eines marginalisierten Partikelfilters. In: <i>7. ITG-Fachtagung Sprachkommunikation</i>.
    ; 2006.'
  apa: Windmann, S., &#38; Haeb-Umbach, R. (2006). Einkanalige Sprachsignalverbesserung
    mit Hilfe eines marginalisierten Partikelfilters. In <i>7. ITG-Fachtagung Sprachkommunikation</i>.
  bibtex: '@inproceedings{Windmann_Haeb-Umbach_2006, title={Einkanalige Sprachsignalverbesserung
    mit Hilfe eines marginalisierten Partikelfilters}, booktitle={7. ITG-Fachtagung
    Sprachkommunikation}, author={Windmann, Stefan and Haeb-Umbach, Reinhold}, year={2006}
    }'
  chicago: Windmann, Stefan, and Reinhold Haeb-Umbach. “Einkanalige Sprachsignalverbesserung
    Mit Hilfe Eines Marginalisierten Partikelfilters.” In <i>7. ITG-Fachtagung Sprachkommunikation</i>,
    2006.
  ieee: S. Windmann and R. Haeb-Umbach, “Einkanalige Sprachsignalverbesserung mit
    Hilfe eines marginalisierten Partikelfilters,” in <i>7. ITG-Fachtagung Sprachkommunikation</i>,
    2006.
  mla: Windmann, Stefan, and Reinhold Haeb-Umbach. “Einkanalige Sprachsignalverbesserung
    Mit Hilfe Eines Marginalisierten Partikelfilters.” <i>7. ITG-Fachtagung Sprachkommunikation</i>,
    2006.
  short: 'S. Windmann, R. Haeb-Umbach, in: 7. ITG-Fachtagung Sprachkommunikation,
    2006.'
date_created: 2019-07-12T05:31:14Z
date_updated: 2022-01-06T06:51:12Z
department:
- _id: '54'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://groups.uni-paderborn.de/nt/pubs/2006/WiHa06-1.pdf
oa: '1'
publication: 7. ITG-Fachtagung Sprachkommunikation
status: public
title: Einkanalige Sprachsignalverbesserung mit Hilfe eines marginalisierten Partikelfilters
type: conference
user_id: '44006'
year: '2006'
...