---
_id: '64821'
article_number: '56'
author:
- first_name: Mugdha
  full_name: Khedkar, Mugdha
  id: '88024'
  last_name: Khedkar
- first_name: Michael
  full_name: Schlichtig, Michael
  id: '32312'
  last_name: Schlichtig
  orcid: 0000-0001-6600-6171
- first_name: Nihad
  full_name: Atakishiyev, Nihad
  last_name: Atakishiyev
- first_name: Eric
  full_name: Bodden, Eric
  id: '59256'
  last_name: Bodden
  orcid: 0000-0003-3470-3647
citation:
  ama: 'Khedkar M, Schlichtig M, Atakishiyev N, Bodden E. Between Law and Code: Challenges
    and Opportunities for Automating Privacy Assessments. <i>Automated Software Engineering
    </i>. 2026;33(2). doi:<a href="https://doi.org/10.1007/s10515-026-00601-4">10.1007/s10515-026-00601-4</a>'
  apa: 'Khedkar, M., Schlichtig, M., Atakishiyev, N., &#38; Bodden, E. (2026). Between
    Law and Code: Challenges and Opportunities for Automating Privacy Assessments.
    <i>Automated Software Engineering </i>, <i>33</i>(2), Article 56. <a href="https://doi.org/10.1007/s10515-026-00601-4">https://doi.org/10.1007/s10515-026-00601-4</a>'
  bibtex: '@article{Khedkar_Schlichtig_Atakishiyev_Bodden_2026, title={Between Law
    and Code: Challenges and Opportunities for Automating Privacy Assessments}, volume={33},
    DOI={<a href="https://doi.org/10.1007/s10515-026-00601-4">10.1007/s10515-026-00601-4</a>},
    number={256}, journal={Automated Software Engineering }, publisher={Springer US},
    author={Khedkar, Mugdha and Schlichtig, Michael and Atakishiyev, Nihad and Bodden,
    Eric}, year={2026} }'
  chicago: 'Khedkar, Mugdha, Michael Schlichtig, Nihad Atakishiyev, and Eric Bodden.
    “Between Law and Code: Challenges and Opportunities for Automating Privacy Assessments.”
    <i>Automated Software Engineering </i> 33, no. 2 (2026). <a href="https://doi.org/10.1007/s10515-026-00601-4">https://doi.org/10.1007/s10515-026-00601-4</a>.'
  ieee: 'M. Khedkar, M. Schlichtig, N. Atakishiyev, and E. Bodden, “Between Law and
    Code: Challenges and Opportunities for Automating Privacy Assessments,” <i>Automated
    Software Engineering </i>, vol. 33, no. 2, Art. no. 56, 2026, doi: <a href="https://doi.org/10.1007/s10515-026-00601-4">10.1007/s10515-026-00601-4</a>.'
  mla: 'Khedkar, Mugdha, et al. “Between Law and Code: Challenges and Opportunities
    for Automating Privacy Assessments.” <i>Automated Software Engineering </i>, vol.
    33, no. 2, 56, Springer US, 2026, doi:<a href="https://doi.org/10.1007/s10515-026-00601-4">10.1007/s10515-026-00601-4</a>.'
  short: M. Khedkar, M. Schlichtig, N. Atakishiyev, E. Bodden, Automated Software
    Engineering  33 (2026).
date_created: 2026-03-04T08:03:14Z
date_updated: 2026-03-13T12:10:38Z
department:
- _id: '76'
doi: 10.1007/s10515-026-00601-4
intvolume: '        33'
issue: '2'
language:
- iso: eng
publication: 'Automated Software Engineering '
publication_identifier:
  unknown:
  - 1573-7535
publisher: Springer US
status: public
title: 'Between Law and Code: Challenges and Opportunities for Automating Privacy
  Assessments'
type: journal_article
user_id: '88024'
volume: 33
year: '2026'
...
---
_id: '64979'
abstract:
- lang: eng
  text: We investigate homogeneous coupled cell systems with high-dimensional internal
    dynamics. In many studies on network dynamics, the analysis is restricted to networks
    with one-dimensional internal dynamics. Here, we show how symmetry explains the
    relation between dynamical behavior of systems with one-dimensional internal dynamics
    and with higher dimensional internal dynamics, when the underlying network topology
    is the same. Fundamental networks of homogeneous coupled cell systems (B. Rink,
    J. Sanders. Coupled Cell Networks and Their Hidden Symmetries. SIAM J. Math. Anal.
    46.2 (2014)) can be expressed in terms of monoid representations, which uniquely
    decompose into indecomposable subrepresentations. In the high-dimensional internal
    dynamics case, these subrepresentations are isomorphic to multiple copies of those
    one computes in the one-dimensional internal dynamics case. This has interesting
    implications for possible center subspaces in bifurcation analysis. We describe
    the effect on steady state and Hopf bifurcations in l-parameter families of network
    vector fields. The main results in that regard are that (1) generic one-parameter
    steady state bifurcations are qualitatively independent of the dimension of the
    internal dynamics and that, (2) in order to observe all generic l-parameter bifurcations
    that may occur for internal dynamics of any dimension, the internal dynamics has
    to be at least l-dimensional for steady state bifurcations and 2l-dimensional
    for Hopf bifurcations. Furthermore, we illustrate how additional structure in
    the network can be exploited to obtain even greater understanding of bifurcation
    scenarios in the high-dimensional case beyond qualitative statements about the
    collective dynamics. One-parameter steady state bifurcations in feedforward networks
    exhibit an unusual amplification in the asymptotic growth rates of individual
    cells, when these are one-dimensional (S. von der Gracht, E. Nijholt, B. Rink.
    Amplified steady state bifurcations in feedforward networks. Nonlinearity 35.4
    (2022)). As another main result, we prove that (3) the same cells exhibit this
    amplifying effect with the same growth rates when the internal dynamics is high-dimensional.
article_number: '118196'
article_type: original
author:
- first_name: Sören
  full_name: von der Gracht, Sören
  id: '97359'
  last_name: von der Gracht
  orcid: 0000-0002-8054-2058
- first_name: Eddie
  full_name: Nijholt, Eddie
  last_name: Nijholt
- first_name: Bob
  full_name: Rink, Bob
  last_name: Rink
citation:
  ama: von der Gracht S, Nijholt E, Rink B. Homogeneous coupled cell systems with
    high-dimensional internal dynamics. <i>Chaos, Solitons &#38; Fractals</i>. 2026;208.
    doi:<a href="https://doi.org/10.1016/j.chaos.2026.118196">10.1016/j.chaos.2026.118196</a>
  apa: von der Gracht, S., Nijholt, E., &#38; Rink, B. (2026). Homogeneous coupled
    cell systems with high-dimensional internal dynamics. <i>Chaos, Solitons &#38;
    Fractals</i>, <i>208</i>, Article 118196. <a href="https://doi.org/10.1016/j.chaos.2026.118196">https://doi.org/10.1016/j.chaos.2026.118196</a>
  bibtex: '@article{von der Gracht_Nijholt_Rink_2026, title={Homogeneous coupled cell
    systems with high-dimensional internal dynamics}, volume={208}, DOI={<a href="https://doi.org/10.1016/j.chaos.2026.118196">10.1016/j.chaos.2026.118196</a>},
    number={118196}, journal={Chaos, Solitons &#38; Fractals}, publisher={Elsevier
    BV}, author={von der Gracht, Sören and Nijholt, Eddie and Rink, Bob}, year={2026}
    }'
  chicago: Gracht, Sören von der, Eddie Nijholt, and Bob Rink. “Homogeneous Coupled
    Cell Systems with High-Dimensional Internal Dynamics.” <i>Chaos, Solitons &#38;
    Fractals</i> 208 (2026). <a href="https://doi.org/10.1016/j.chaos.2026.118196">https://doi.org/10.1016/j.chaos.2026.118196</a>.
  ieee: 'S. von der Gracht, E. Nijholt, and B. Rink, “Homogeneous coupled cell systems
    with high-dimensional internal dynamics,” <i>Chaos, Solitons &#38; Fractals</i>,
    vol. 208, Art. no. 118196, 2026, doi: <a href="https://doi.org/10.1016/j.chaos.2026.118196">10.1016/j.chaos.2026.118196</a>.'
  mla: von der Gracht, Sören, et al. “Homogeneous Coupled Cell Systems with High-Dimensional
    Internal Dynamics.” <i>Chaos, Solitons &#38; Fractals</i>, vol. 208, 118196, Elsevier
    BV, 2026, doi:<a href="https://doi.org/10.1016/j.chaos.2026.118196">10.1016/j.chaos.2026.118196</a>.
  short: S. von der Gracht, E. Nijholt, B. Rink, Chaos, Solitons &#38; Fractals 208
    (2026).
date_created: 2026-03-16T08:39:07Z
date_updated: 2026-03-16T08:42:56Z
ddc:
- '510'
department:
- _id: '101'
- _id: '841'
doi: 10.1016/j.chaos.2026.118196
external_id:
  arxiv:
  - '2510.06740'
file:
- access_level: closed
  content_type: application/pdf
  creator: svdg
  date_created: 2026-03-16T08:40:04Z
  date_updated: 2026-03-16T08:40:04Z
  file_id: '64980'
  file_name: homogeneous-coupled-cell-systems-with-high-dimensional-internal-dynamics.pdf
  file_size: 1951746
  relation: main_file
  success: 1
file_date_updated: 2026-03-16T08:40:04Z
has_accepted_license: '1'
intvolume: '       208'
keyword:
- Coupled cell systems
- Network dynamics
- Dimension reduction
- Bifurcation theory
- Symmetry
- Monoid representation theory
language:
- iso: eng
publication: Chaos, Solitons & Fractals
publication_identifier:
  issn:
  - 0960-0779
publication_status: published
publisher: Elsevier BV
status: public
title: Homogeneous coupled cell systems with high-dimensional internal dynamics
type: journal_article
user_id: '97359'
volume: 208
year: '2026'
...
---
_id: '65017'
abstract:
- lang: eng
  text: Static Application Security Testing (SAST) tools play a vital role in modern
    software development by automatically detecting potential vulnerabilities in source
    code. However, their effectiveness is often limited by a high rate of false positives,
    which wastes developer's effort and undermines trust in automated analysis. This
    work presents a Graph Convolutional Network (GCN) model designed to predict SAST
    reports as true and false positive. The model leverages Code Property Graphs (CPGs)
    constructed from static analysis results to capture both, structural and semantic
    relationships within code. Trained on the CamBenchCAP dataset, the model achieved
    an accuracy of 100% on the test set using an 80/20 train-test split. Evaluation
    on the CryptoAPI-Bench benchmark further demonstrated the model's practical applicability,
    reaching an overall accuracy of up to 96.6%. A detailed qualitative inspection
    revealed that many cases marked as misclassifications corresponded to genuine
    security weaknesses, indicating that the model effectively reflects conservative,
    security-aware reasoning. Identified limitations include incomplete control-flow
    representation due to missing interprocedural connections. Future work will focus
    on integrating call graphs, applying graph explainability techniques, and extending
    training data across multiple SAST tools to improve generalization and interpretability.
author:
- first_name: Tom
  full_name: Ohlmer, Tom
  last_name: Ohlmer
- first_name: Michael
  full_name: Schlichtig, Michael
  id: '32312'
  last_name: Schlichtig
  orcid: 0000-0001-6600-6171
- first_name: Eric
  full_name: Bodden, Eric
  id: '59256'
  last_name: Bodden
  orcid: 0000-0003-3470-3647
citation:
  ama: Ohlmer T, Schlichtig M, Bodden E. FP-Predictor - False Positive Prediction
    for Static Analysis Reports. <i>arXiv:260310558</i>. Published online 2026.
  apa: Ohlmer, T., Schlichtig, M., &#38; Bodden, E. (2026). FP-Predictor - False Positive
    Prediction for Static Analysis Reports. In <i>arXiv:2603.10558</i>.
  bibtex: '@article{Ohlmer_Schlichtig_Bodden_2026, title={FP-Predictor - False Positive
    Prediction for Static Analysis Reports}, journal={arXiv:2603.10558}, author={Ohlmer,
    Tom and Schlichtig, Michael and Bodden, Eric}, year={2026} }'
  chicago: Ohlmer, Tom, Michael Schlichtig, and Eric Bodden. “FP-Predictor - False
    Positive Prediction for Static Analysis Reports.” <i>ArXiv:2603.10558</i>, 2026.
  ieee: T. Ohlmer, M. Schlichtig, and E. Bodden, “FP-Predictor - False Positive Prediction
    for Static Analysis Reports,” <i>arXiv:2603.10558</i>. 2026.
  mla: Ohlmer, Tom, et al. “FP-Predictor - False Positive Prediction for Static Analysis
    Reports.” <i>ArXiv:2603.10558</i>, 2026.
  short: T. Ohlmer, M. Schlichtig, E. Bodden, ArXiv:2603.10558 (2026).
date_created: 2026-03-16T17:38:33Z
date_updated: 2026-03-16T17:40:31Z
department:
- _id: '76'
external_id:
  arxiv:
  - '2603.10558'
language:
- iso: eng
publication: arXiv:2603.10558
status: public
title: FP-Predictor - False Positive Prediction for Static Analysis Reports
type: preprint
user_id: '32312'
year: '2026'
...
---
_id: '64176'
author:
- first_name: Katrin
  full_name: Deutschen, Katrin
  id: '64894'
  last_name: Deutschen
- first_name: Inga
  full_name: Neufeld, Inga
  id: '61635'
  last_name: Neufeld
- first_name: Uta
  full_name: Häsel-Weide, Uta
  id: '60267'
  last_name: Häsel-Weide
  orcid: 0000-0001-6278-4240
citation:
  ama: Deutschen K, Neufeld I, Häsel-Weide U. Lernbegleitung produktiv gestalten.
    Mathematische Verstehensprozesse von Kindern anregen. <i>Grundschule aktuell</i>.
    2026;(173):10-11.
  apa: Deutschen, K., Neufeld, I., &#38; Häsel-Weide, U. (2026). Lernbegleitung produktiv
    gestalten. Mathematische Verstehensprozesse von Kindern anregen. <i>Grundschule
    aktuell</i>, <i>173</i>, 10–11.
  bibtex: '@article{Deutschen_Neufeld_Häsel-Weide_2026, title={Lernbegleitung produktiv
    gestalten. Mathematische Verstehensprozesse von Kindern anregen.}, number={173},
    journal={Grundschule aktuell}, author={Deutschen, Katrin and Neufeld, Inga and
    Häsel-Weide, Uta}, year={2026}, pages={10–11} }'
  chicago: 'Deutschen, Katrin, Inga Neufeld, and Uta Häsel-Weide. “Lernbegleitung
    produktiv gestalten. Mathematische Verstehensprozesse von Kindern anregen.” <i>Grundschule
    aktuell</i>, no. 173 (2026): 10–11.'
  ieee: K. Deutschen, I. Neufeld, and U. Häsel-Weide, “Lernbegleitung produktiv gestalten.
    Mathematische Verstehensprozesse von Kindern anregen.,” <i>Grundschule aktuell</i>,
    no. 173, pp. 10–11, 2026.
  mla: Deutschen, Katrin, et al. “Lernbegleitung produktiv gestalten. Mathematische
    Verstehensprozesse von Kindern anregen.” <i>Grundschule aktuell</i>, no. 173,
    2026, pp. 10–11.
  short: K. Deutschen, I. Neufeld, U. Häsel-Weide, Grundschule aktuell (2026) 10–11.
date_created: 2026-02-16T12:16:29Z
date_updated: 2026-03-17T10:48:56Z
department:
- _id: '543'
issue: '173'
language:
- iso: ger
page: 10-11
publication: Grundschule aktuell
status: public
title: Lernbegleitung produktiv gestalten. Mathematische Verstehensprozesse von Kindern
  anregen.
type: journal_article
user_id: '44184'
year: '2026'
...
---
_id: '65026'
author:
- first_name: Inga
  full_name: Neufeld, Inga
  id: '61635'
  last_name: Neufeld
- first_name: Uta
  full_name: Häsel-Weide, Uta
  id: '60267'
  last_name: Häsel-Weide
  orcid: 0000-0001-6278-4240
citation:
  ama: 'Neufeld I, Häsel-Weide U.  Lernbegleitung in der mathematischen Förderung.
    Praktiken von (angehenden) Lehrkräften bei der Förderung arithmetischer Basiskompetenzen.
    In: Vogelsang C, Grotegurt L, Bruns J, Riese J, Fechner S, eds. <i>Handlungsorientierung
    in Der Ausbildung von Lehrkräften Und Pädagogischen Fachkräften. Konzeptionen
    Und Forschungsperspektiven</i>. ; 2026:119-134. doi:<a href="https://doi.org/10.31244/9783818851057
    ">10.31244/9783818851057 </a>'
  apa: Neufeld, I., &#38; Häsel-Weide, U. (2026).  Lernbegleitung in der mathematischen
    Förderung. Praktiken von (angehenden) Lehrkräften bei der Förderung arithmetischer
    Basiskompetenzen. In C. Vogelsang, L. Grotegurt, J. Bruns, J. Riese, &#38; S.
    Fechner (Eds.), <i>Handlungsorientierung in der Ausbildung von Lehrkräften und
    pädagogischen Fachkräften. Konzeptionen und Forschungsperspektiven</i> (pp. 119–134).
    <a href="https://doi.org/10.31244/9783818851057 ">https://doi.org/10.31244/9783818851057
    </a>
  bibtex: '@inbook{Neufeld_Häsel-Weide_2026, title={ Lernbegleitung in der mathematischen
    Förderung. Praktiken von (angehenden) Lehrkräften bei der Förderung arithmetischer
    Basiskompetenzen}, DOI={<a href="https://doi.org/10.31244/9783818851057 ">10.31244/9783818851057
    </a>}, booktitle={Handlungsorientierung in der Ausbildung von Lehrkräften und
    pädagogischen Fachkräften. Konzeptionen und Forschungsperspektiven}, author={Neufeld,
    Inga and Häsel-Weide, Uta}, editor={Vogelsang, C. and Grotegurt, L. and Bruns,
    J. and Riese, J. and Fechner, S.}, year={2026}, pages={119–134} }'
  chicago: Neufeld, Inga, and Uta Häsel-Weide. “ Lernbegleitung in Der Mathematischen
    Förderung. Praktiken von (Angehenden) Lehrkräften Bei Der Förderung Arithmetischer
    Basiskompetenzen.” In <i>Handlungsorientierung in Der Ausbildung von Lehrkräften
    Und Pädagogischen Fachkräften. Konzeptionen Und Forschungsperspektiven</i>, edited
    by C. Vogelsang, L. Grotegurt, J. Bruns, J. Riese, and S. Fechner, 119–34, 2026.
    <a href="https://doi.org/10.31244/9783818851057 ">https://doi.org/10.31244/9783818851057
    </a>.
  ieee: I. Neufeld and U. Häsel-Weide, “ Lernbegleitung in der mathematischen Förderung.
    Praktiken von (angehenden) Lehrkräften bei der Förderung arithmetischer Basiskompetenzen,”
    in <i>Handlungsorientierung in der Ausbildung von Lehrkräften und pädagogischen
    Fachkräften. Konzeptionen und Forschungsperspektiven</i>, C. Vogelsang, L. Grotegurt,
    J. Bruns, J. Riese, and S. Fechner, Eds. 2026, pp. 119–134.
  mla: Neufeld, Inga, and Uta Häsel-Weide. “ Lernbegleitung in Der Mathematischen
    Förderung. Praktiken von (Angehenden) Lehrkräften Bei Der Förderung Arithmetischer
    Basiskompetenzen.” <i>Handlungsorientierung in Der Ausbildung von Lehrkräften
    Und Pädagogischen Fachkräften. Konzeptionen Und Forschungsperspektiven</i>, edited
    by C. Vogelsang et al., 2026, pp. 119–34, doi:<a href="https://doi.org/10.31244/9783818851057
    ">10.31244/9783818851057 </a>.
  short: 'I. Neufeld, U. Häsel-Weide, in: C. Vogelsang, L. Grotegurt, J. Bruns, J.
    Riese, S. Fechner (Eds.), Handlungsorientierung in Der Ausbildung von Lehrkräften
    Und Pädagogischen Fachkräften. Konzeptionen Und Forschungsperspektiven, 2026,
    pp. 119–134.'
date_created: 2026-03-17T10:57:17Z
date_updated: 2026-03-17T11:03:11Z
department:
- _id: '543'
doi: '10.31244/9783818851057 '
editor:
- first_name: C.
  full_name: Vogelsang, C.
  last_name: Vogelsang
- first_name: L.
  full_name: Grotegurt, L.
  last_name: Grotegurt
- first_name: J.
  full_name: Bruns, J.
  last_name: Bruns
- first_name: J.
  full_name: Riese, J.
  last_name: Riese
- first_name: S.
  full_name: Fechner, S.
  last_name: Fechner
language:
- iso: eng
page: 119-134
publication: Handlungsorientierung in der Ausbildung von Lehrkräften und pädagogischen
  Fachkräften. Konzeptionen und Forschungsperspektiven
status: public
title: ' Lernbegleitung in der mathematischen Förderung. Praktiken von (angehenden)
  Lehrkräften bei der Förderung arithmetischer Basiskompetenzen'
type: book_chapter
user_id: '44184'
year: '2026'
...
---
_id: '65030'
author:
- first_name: Luis
  full_name: Amaral, Luis
  last_name: Amaral
- first_name: Michael
  full_name: Schlichtig, Michael
  id: '32312'
  last_name: Schlichtig
  orcid: 0000-0001-6600-6171
- first_name: Wagner
  full_name: Emanuel, Wagner
  last_name: Emanuel
- first_name: Joilton
  full_name: Almeida, Joilton
  last_name: Almeida
- first_name: Carine
  full_name: Ferreira, Carine
  last_name: Ferreira
- first_name: Jérôme
  full_name: Kempf, Jérôme
  last_name: Kempf
- first_name: Rodrigo
  full_name: Bonifácio, Rodrigo
  last_name: Bonifácio
- first_name: Eric
  full_name: Bodden, Eric
  id: '59256'
  last_name: Bodden
  orcid: 0000-0003-3470-3647
- first_name: Laerte
  full_name: Peotta, Laerte
  last_name: Peotta
- first_name: Gustavo
  full_name: Pinto, Gustavo
  last_name: Pinto
- first_name: Márcio
  full_name: Ribeiro, Márcio
  last_name: Ribeiro
citation:
  ama: 'Amaral L, Schlichtig M, Emanuel W, et al. From Legacy Designs to Vulnerability
    Fixes: Understanding SAST Adoption in Non-Technological Companies. In: <i>2026
    IEEE International Conference on Software Analysis, Evolution and Reengineering
    (SANER)</i>. ; 2026.'
  apa: 'Amaral, L., Schlichtig, M., Emanuel, W., Almeida, J., Ferreira, C., Kempf,
    J., Bonifácio, R., Bodden, E., Peotta, L., Pinto, G., &#38; Ribeiro, M. (2026).
    From Legacy Designs to Vulnerability Fixes: Understanding SAST Adoption in Non-Technological
    Companies. <i>2026 IEEE International Conference on Software Analysis, Evolution
    and Reengineering (SANER)</i>.'
  bibtex: '@inproceedings{Amaral_Schlichtig_Emanuel_Almeida_Ferreira_Kempf_Bonifácio_Bodden_Peotta_Pinto_et
    al._2026, title={From Legacy Designs to Vulnerability Fixes: Understanding SAST
    Adoption in Non-Technological Companies}, booktitle={2026 IEEE International Conference
    on Software Analysis, Evolution and Reengineering (SANER)}, author={Amaral, Luis
    and Schlichtig, Michael and Emanuel, Wagner and Almeida, Joilton and Ferreira,
    Carine and Kempf, Jérôme and Bonifácio, Rodrigo and Bodden, Eric and Peotta, Laerte
    and Pinto, Gustavo and et al.}, year={2026} }'
  chicago: 'Amaral, Luis, Michael Schlichtig, Wagner Emanuel, Joilton Almeida, Carine
    Ferreira, Jérôme Kempf, Rodrigo Bonifácio, et al. “From Legacy Designs to Vulnerability
    Fixes: Understanding SAST Adoption in Non-Technological Companies.” In <i>2026
    IEEE International Conference on Software Analysis, Evolution and Reengineering
    (SANER)</i>, 2026.'
  ieee: 'L. Amaral <i>et al.</i>, “From Legacy Designs to Vulnerability Fixes: Understanding
    SAST Adoption in Non-Technological Companies,” 2026.'
  mla: 'Amaral, Luis, et al. “From Legacy Designs to Vulnerability Fixes: Understanding
    SAST Adoption in Non-Technological Companies.” <i>2026 IEEE International Conference
    on Software Analysis, Evolution and Reengineering (SANER)</i>, 2026.'
  short: 'L. Amaral, M. Schlichtig, W. Emanuel, J. Almeida, C. Ferreira, J. Kempf,
    R. Bonifácio, E. Bodden, L. Peotta, G. Pinto, M. Ribeiro, in: 2026 IEEE International
    Conference on Software Analysis, Evolution and Reengineering (SANER), 2026.'
date_created: 2026-03-17T11:59:09Z
date_updated: 2026-03-17T12:02:14Z
department:
- _id: '76'
language:
- iso: eng
publication: 2026 IEEE International Conference on Software Analysis, Evolution and
  Reengineering (SANER)
status: public
title: 'From Legacy Designs to Vulnerability Fixes: Understanding SAST Adoption in
  Non-Technological Companies'
type: conference
user_id: '32312'
year: '2026'
...
---
_id: '63754'
abstract:
- lang: eng
  text: Data spaces are receiving an emerging interest in Information Systems Research
    and industry practice. They are central to many European research initiatives
    and shape the data economy in Industry 4.0. Generally, they aim to create secure
    environments for cross-organizational data management and sharing. Currently,
    there is considerable interest in developing new data spaces in Industry 4.0,
    also accelerated through regulatory changes. However, key questions about what
    precisely characterizes a data space in Industry 4.0 remain unresolved. Against
    this backdrop, we build a taxonomy of data spaces in the Industry 4.0 context.
    We identified nine distinctive dimensions and 40 corresponding characteristics
    among the 19 data spaces analyzed. The taxonomy enables clearer classification
    and nomenclature of data spaces in this context. This short paper will ignite
    planned further research on data spaces in Industry 4.0 and contribute to a conceptualization
    of a taxonomic theory for interested researchers.
author:
- first_name: Oliver
  full_name: Werth, Oliver
  last_name: Werth
- first_name: Christian
  full_name: Koldewey, Christian
  id: '43136'
  last_name: Koldewey
  orcid: https://orcid.org/0000-0001-7992-6399
- first_name: Mathias
  full_name: Uslar, Mathias
  last_name: Uslar
- first_name: Julian
  full_name: Zerbin, Julian
  id: '51711'
  last_name: Zerbin
citation:
  ama: 'Werth O, Koldewey C, Uslar M, Zerbin J. What Characterizes Data Spaces in
    Industry 4.0? Towards a Better Understanding. In: <i>Lecture Notes in Business
    Information Processing</i>. Springer Nature Switzerland; 2026. doi:<a href="https://doi.org/10.1007/978-3-032-14518-5_3">10.1007/978-3-032-14518-5_3</a>'
  apa: Werth, O., Koldewey, C., Uslar, M., &#38; Zerbin, J. (2026). What Characterizes
    Data Spaces in Industry 4.0? Towards a Better Understanding. <i>Lecture Notes
    in Business Information Processing</i>. 16th International Conference on Software
    Business (ICSOB 2025), Stuttgart, Germany. <a href="https://doi.org/10.1007/978-3-032-14518-5_3">https://doi.org/10.1007/978-3-032-14518-5_3</a>
  bibtex: '@inproceedings{Werth_Koldewey_Uslar_Zerbin_2026, place={Cham}, title={What
    Characterizes Data Spaces in Industry 4.0? Towards a Better Understanding}, DOI={<a
    href="https://doi.org/10.1007/978-3-032-14518-5_3">10.1007/978-3-032-14518-5_3</a>},
    booktitle={Lecture Notes in Business Information Processing}, publisher={Springer
    Nature Switzerland}, author={Werth, Oliver and Koldewey, Christian and Uslar,
    Mathias and Zerbin, Julian}, year={2026} }'
  chicago: 'Werth, Oliver, Christian Koldewey, Mathias Uslar, and Julian Zerbin. “What
    Characterizes Data Spaces in Industry 4.0? Towards a Better Understanding.” In
    <i>Lecture Notes in Business Information Processing</i>. Cham: Springer Nature
    Switzerland, 2026. <a href="https://doi.org/10.1007/978-3-032-14518-5_3">https://doi.org/10.1007/978-3-032-14518-5_3</a>.'
  ieee: 'O. Werth, C. Koldewey, M. Uslar, and J. Zerbin, “What Characterizes Data
    Spaces in Industry 4.0? Towards a Better Understanding,” presented at the 16th
    International Conference on Software Business (ICSOB 2025), Stuttgart, Germany,
    2026, doi: <a href="https://doi.org/10.1007/978-3-032-14518-5_3">10.1007/978-3-032-14518-5_3</a>.'
  mla: Werth, Oliver, et al. “What Characterizes Data Spaces in Industry 4.0? Towards
    a Better Understanding.” <i>Lecture Notes in Business Information Processing</i>,
    Springer Nature Switzerland, 2026, doi:<a href="https://doi.org/10.1007/978-3-032-14518-5_3">10.1007/978-3-032-14518-5_3</a>.
  short: 'O. Werth, C. Koldewey, M. Uslar, J. Zerbin, in: Lecture Notes in Business
    Information Processing, Springer Nature Switzerland, Cham, 2026.'
conference:
  end_date: 2025-11-26
  location: Stuttgart, Germany
  name: 16th International Conference on Software Business (ICSOB 2025)
  start_date: 2025-11-24
date_created: 2026-01-27T11:56:10Z
date_updated: 2026-03-18T07:12:49Z
department:
- _id: '563'
doi: 10.1007/978-3-032-14518-5_3
keyword:
- Industry 4.0
- Taxonomy
- Data spaces
- Characterization
language:
- iso: eng
place: Cham
publication: Lecture Notes in Business Information Processing
publication_identifier:
  isbn:
  - '9783032145178'
  - '9783032145185'
  issn:
  - 1865-1348
  - 1865-1356
publication_status: published
publisher: Springer Nature Switzerland
quality_controlled: '1'
status: public
title: What Characterizes Data Spaces in Industry 4.0? Towards a Better Understanding
type: conference
user_id: '51711'
year: '2026'
...
---
_id: '65036'
author:
- first_name: Tal
  full_name: Cohen, Tal
  last_name: Cohen
- first_name: Helge
  full_name: Glöckner, Helge
  id: '178'
  last_name: Glöckner
- first_name: Gil
  full_name: Goffer, Gil
  last_name: Goffer
- first_name: Waltraud
  full_name: Lederle, Waltraud
  last_name: Lederle
citation:
  ama: Cohen T, Glöckner H, Goffer G, Lederle W. Compact invariant random subgroups.
    Published online 2026.
  apa: Cohen, T., Glöckner, H., Goffer, G., &#38; Lederle, W. (2026). <i>Compact invariant
    random subgroups</i>.
  bibtex: '@article{Cohen_Glöckner_Goffer_Lederle_2026, title={Compact invariant random
    subgroups}, author={Cohen, Tal and Glöckner, Helge and Goffer, Gil and Lederle,
    Waltraud}, year={2026} }'
  chicago: Cohen, Tal, Helge Glöckner, Gil Goffer, and Waltraud Lederle. “Compact
    Invariant Random Subgroups,” 2026.
  ieee: T. Cohen, H. Glöckner, G. Goffer, and W. Lederle, “Compact invariant random
    subgroups.” 2026.
  mla: Cohen, Tal, et al. <i>Compact Invariant Random Subgroups</i>. 2026.
  short: T. Cohen, H. Glöckner, G. Goffer, W. Lederle, (2026).
date_created: 2026-03-18T02:49:44Z
date_updated: 2026-03-18T02:50:18Z
department:
- _id: '10'
- _id: '87'
- _id: '93'
external_id:
  arxiv:
  - 'arXiv:2603.16022 '
language:
- iso: eng
status: public
title: Compact invariant random subgroups
type: preprint
user_id: '178'
year: '2026'
...
---
_id: '65101'
abstract:
- lang: eng
  text: Various methods to measure the dynamic behavior of particles require the calculation
    of autocorrelation functions. For this purpose, fast multi-tau correlators have
    been developed in dedicated hardware, in software, and on FPGAs. However, for
    methods such as X-ray Photon Correlation Spectroscopy (XPCS), which requires to
    calculate the autocorrelation function independently for hundreds of thousands
    to millions of pixels from high-resolution detectors, current approaches rely
    on offline processing after data acquisition. Moreover, the internal pipeline
    state of so many independent correlators is far too large to keep it on-chip.
    In this work, we propose a design approach on FPGAs, where pipeline contexts are
    stored in off-chip HBM memory. Each compute unit iteratively loads the state for
    a single pixel, processes a short time series for this pixel, and afterwards writes
    back the context in a dataflow pipeline. We have implemented the required compute
    kernels with Vitis HLS and analyze resulting designs on an Alveo U280 card. The
    design achieves the expected performance and for the first time provides sufficient
    throughput for current high-end detectors used in XPCS.
author:
- first_name: Abdul Rehman
  full_name: Tareen, Abdul Rehman
  id: '76938'
  last_name: Tareen
- first_name: Christian
  full_name: Plessl, Christian
  id: '16153'
  last_name: Plessl
  orcid: 0000-0001-5728-9982
- first_name: Tobias
  full_name: Kenter, Tobias
  id: '3145'
  last_name: Kenter
citation:
  ama: 'Tareen AR, Plessl C, Kenter T. Fast Multi-Tau Correlators on FPGA with Context
    Switching From and to High- Bandwidth Memory. In: <i>2025 International Conference
    on Field Programmable Technology (ICFPT)</i>. IEEE; 2026. doi:<a href="https://doi.org/10.1109/icfpt67023.2025.00027">10.1109/icfpt67023.2025.00027</a>'
  apa: Tareen, A. R., Plessl, C., &#38; Kenter, T. (2026). Fast Multi-Tau Correlators
    on FPGA with Context Switching From and to High- Bandwidth Memory. <i>2025 International
    Conference on Field Programmable Technology (ICFPT)</i>. <a href="https://doi.org/10.1109/icfpt67023.2025.00027">https://doi.org/10.1109/icfpt67023.2025.00027</a>
  bibtex: '@inproceedings{Tareen_Plessl_Kenter_2026, title={Fast Multi-Tau Correlators
    on FPGA with Context Switching From and to High- Bandwidth Memory}, DOI={<a href="https://doi.org/10.1109/icfpt67023.2025.00027">10.1109/icfpt67023.2025.00027</a>},
    booktitle={2025 International Conference on Field Programmable Technology (ICFPT)},
    publisher={IEEE}, author={Tareen, Abdul Rehman and Plessl, Christian and Kenter,
    Tobias}, year={2026} }'
  chicago: Tareen, Abdul Rehman, Christian Plessl, and Tobias Kenter. “Fast Multi-Tau
    Correlators on FPGA with Context Switching From and to High- Bandwidth Memory.”
    In <i>2025 International Conference on Field Programmable Technology (ICFPT)</i>.
    IEEE, 2026. <a href="https://doi.org/10.1109/icfpt67023.2025.00027">https://doi.org/10.1109/icfpt67023.2025.00027</a>.
  ieee: 'A. R. Tareen, C. Plessl, and T. Kenter, “Fast Multi-Tau Correlators on FPGA
    with Context Switching From and to High- Bandwidth Memory,” 2026, doi: <a href="https://doi.org/10.1109/icfpt67023.2025.00027">10.1109/icfpt67023.2025.00027</a>.'
  mla: Tareen, Abdul Rehman, et al. “Fast Multi-Tau Correlators on FPGA with Context
    Switching From and to High- Bandwidth Memory.” <i>2025 International Conference
    on Field Programmable Technology (ICFPT)</i>, IEEE, 2026, doi:<a href="https://doi.org/10.1109/icfpt67023.2025.00027">10.1109/icfpt67023.2025.00027</a>.
  short: 'A.R. Tareen, C. Plessl, T. Kenter, in: 2025 International Conference on
    Field Programmable Technology (ICFPT), IEEE, 2026.'
date_created: 2026-03-24T09:02:22Z
date_updated: 2026-03-24T09:04:31Z
department:
- _id: '27'
- _id: '518'
doi: 10.1109/icfpt67023.2025.00027
language:
- iso: eng
project:
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: 2025 International Conference on Field Programmable Technology (ICFPT)
publication_status: published
publisher: IEEE
status: public
title: Fast Multi-Tau Correlators on FPGA with Context Switching From and to High-
  Bandwidth Memory
type: conference
user_id: '3145'
year: '2026'
...
---
_id: '65099'
author:
- first_name: Daniel
  full_name: Weber, Daniel
  last_name: Weber
- first_name: Dominik
  full_name: Schmies, Dominik
  last_name: Schmies
- first_name: Jarren H.
  full_name: Lange, Jarren H.
  last_name: Lange
- first_name: Maximilian
  full_name: Schenke, Maximilian
  last_name: Schenke
- first_name: Oliver
  full_name: Wallscheid, Oliver
  last_name: Wallscheid
citation:
  ama: Weber D, Schmies D, Lange JH, Schenke M, Wallscheid O. Optimal Control of Voltage-Forming
    Grid Inverters by Model Predictive Control and Reinforcement Learning. <i>IEEE
    Access</i>. 2026;14:38517-38535. doi:<a href="https://doi.org/10.1109/access.2026.3670948">10.1109/access.2026.3670948</a>
  apa: Weber, D., Schmies, D., Lange, J. H., Schenke, M., &#38; Wallscheid, O. (2026).
    Optimal Control of Voltage-Forming Grid Inverters by Model Predictive Control
    and Reinforcement Learning. <i>IEEE Access</i>, <i>14</i>, 38517–38535. <a href="https://doi.org/10.1109/access.2026.3670948">https://doi.org/10.1109/access.2026.3670948</a>
  bibtex: '@article{Weber_Schmies_Lange_Schenke_Wallscheid_2026, title={Optimal Control
    of Voltage-Forming Grid Inverters by Model Predictive Control and Reinforcement
    Learning}, volume={14}, DOI={<a href="https://doi.org/10.1109/access.2026.3670948">10.1109/access.2026.3670948</a>},
    journal={IEEE Access}, publisher={Institute of Electrical and Electronics Engineers
    (IEEE)}, author={Weber, Daniel and Schmies, Dominik and Lange, Jarren H. and Schenke,
    Maximilian and Wallscheid, Oliver}, year={2026}, pages={38517–38535} }'
  chicago: 'Weber, Daniel, Dominik Schmies, Jarren H. Lange, Maximilian Schenke, and
    Oliver Wallscheid. “Optimal Control of Voltage-Forming Grid Inverters by Model
    Predictive Control and Reinforcement Learning.” <i>IEEE Access</i> 14 (2026):
    38517–35. <a href="https://doi.org/10.1109/access.2026.3670948">https://doi.org/10.1109/access.2026.3670948</a>.'
  ieee: 'D. Weber, D. Schmies, J. H. Lange, M. Schenke, and O. Wallscheid, “Optimal
    Control of Voltage-Forming Grid Inverters by Model Predictive Control and Reinforcement
    Learning,” <i>IEEE Access</i>, vol. 14, pp. 38517–38535, 2026, doi: <a href="https://doi.org/10.1109/access.2026.3670948">10.1109/access.2026.3670948</a>.'
  mla: Weber, Daniel, et al. “Optimal Control of Voltage-Forming Grid Inverters by
    Model Predictive Control and Reinforcement Learning.” <i>IEEE Access</i>, vol.
    14, Institute of Electrical and Electronics Engineers (IEEE), 2026, pp. 38517–35,
    doi:<a href="https://doi.org/10.1109/access.2026.3670948">10.1109/access.2026.3670948</a>.
  short: D. Weber, D. Schmies, J.H. Lange, M. Schenke, O. Wallscheid, IEEE Access
    14 (2026) 38517–38535.
date_created: 2026-03-23T16:37:18Z
date_updated: 2026-03-23T16:37:24Z
department:
- _id: '34'
- _id: '52'
doi: 10.1109/access.2026.3670948
intvolume: '        14'
language:
- iso: eng
page: 38517-38535
publication: IEEE Access
publication_identifier:
  issn:
  - 2169-3536
publication_status: published
publisher: Institute of Electrical and Electronics Engineers (IEEE)
status: public
title: Optimal Control of Voltage-Forming Grid Inverters by Model Predictive Control
  and Reinforcement Learning
type: journal_article
user_id: '24041'
volume: 14
year: '2026'
...
---
_id: '65098'
author:
- first_name: Daniel
  full_name: Weber, Daniel
  last_name: Weber
- first_name: Jarren
  full_name: Lange, Jarren
  last_name: Lange
- first_name: Oliver
  full_name: Wallscheid, Oliver
  last_name: Wallscheid
citation:
  ama: Weber D, Lange J, Wallscheid O. Reinforcement Learning-Based Control of Voltage-Forming
    Grid Inverters With Arbitrary Loads. <i>IEEE Journal of Emerging and Selected
    Topics in Industrial Electronics</i>. Published online 2026:1-12. doi:<a href="https://doi.org/10.1109/jestie.2026.3654784">10.1109/jestie.2026.3654784</a>
  apa: Weber, D., Lange, J., &#38; Wallscheid, O. (2026). Reinforcement Learning-Based
    Control of Voltage-Forming Grid Inverters With Arbitrary Loads. <i>IEEE Journal
    of Emerging and Selected Topics in Industrial Electronics</i>, 1–12. <a href="https://doi.org/10.1109/jestie.2026.3654784">https://doi.org/10.1109/jestie.2026.3654784</a>
  bibtex: '@article{Weber_Lange_Wallscheid_2026, title={Reinforcement Learning-Based
    Control of Voltage-Forming Grid Inverters With Arbitrary Loads}, DOI={<a href="https://doi.org/10.1109/jestie.2026.3654784">10.1109/jestie.2026.3654784</a>},
    journal={IEEE Journal of Emerging and Selected Topics in Industrial Electronics},
    publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Weber,
    Daniel and Lange, Jarren and Wallscheid, Oliver}, year={2026}, pages={1–12} }'
  chicago: Weber, Daniel, Jarren Lange, and Oliver Wallscheid. “Reinforcement Learning-Based
    Control of Voltage-Forming Grid Inverters With Arbitrary Loads.” <i>IEEE Journal
    of Emerging and Selected Topics in Industrial Electronics</i>, 2026, 1–12. <a
    href="https://doi.org/10.1109/jestie.2026.3654784">https://doi.org/10.1109/jestie.2026.3654784</a>.
  ieee: 'D. Weber, J. Lange, and O. Wallscheid, “Reinforcement Learning-Based Control
    of Voltage-Forming Grid Inverters With Arbitrary Loads,” <i>IEEE Journal of Emerging
    and Selected Topics in Industrial Electronics</i>, pp. 1–12, 2026, doi: <a href="https://doi.org/10.1109/jestie.2026.3654784">10.1109/jestie.2026.3654784</a>.'
  mla: Weber, Daniel, et al. “Reinforcement Learning-Based Control of Voltage-Forming
    Grid Inverters With Arbitrary Loads.” <i>IEEE Journal of Emerging and Selected
    Topics in Industrial Electronics</i>, Institute of Electrical and Electronics
    Engineers (IEEE), 2026, pp. 1–12, doi:<a href="https://doi.org/10.1109/jestie.2026.3654784">10.1109/jestie.2026.3654784</a>.
  short: D. Weber, J. Lange, O. Wallscheid, IEEE Journal of Emerging and Selected
    Topics in Industrial Electronics (2026) 1–12.
date_created: 2026-03-23T16:35:16Z
date_updated: 2026-03-23T16:35:24Z
department:
- _id: '34'
- _id: '52'
doi: 10.1109/jestie.2026.3654784
language:
- iso: eng
page: 1-12
publication: IEEE Journal of Emerging and Selected Topics in Industrial Electronics
publication_identifier:
  issn:
  - 2687-9735
  - 2687-9743
publication_status: published
publisher: Institute of Electrical and Electronics Engineers (IEEE)
status: public
title: Reinforcement Learning-Based Control of Voltage-Forming Grid Inverters With
  Arbitrary Loads
type: journal_article
user_id: '24041'
year: '2026'
...
---
_id: '65178'
abstract:
- lang: eng
  text: "Large intermediate results can cause join queries to run unexpectedly long.
    This problem is particularly common for analytical queries, which aggregate data
    over many tables to produce a comparatively small final output, and queries on
    graph data, where intermediate results blow up quickly. Recent work inspired by
    Yannakakis’ algorithm approaches this by modifying the query engine to avoid materializing
    unnecessary tuples. However, this requires significant changes to the core of
    the system, which is not feasible in many situations such as cloud environments
    or proprietary systems.\r\nIn this work, we propose a flexible approach for optimizing
    long-running join queries from the outside of the DBMS. Rewriting-based realizations
    of Yannakakis’ algorithm suffer from inherent overhead due to the creation of
    intermediate tables. Thus, we present an approach for detecting and targeting
    queries which would benefit from a Yannakakis-style optimization. We introduce
    a new benchmark combining 5 standard benchmarks and augmenting them with additional
    instances, which provides a sufficient size and diversity for a machine learning
    based solution. On PostgreSQL, DuckDB and SparkSQL, slowdowns on queries where
    the rewriting is counterproductive are mostly avoided, as opposed to a naïve application
    of the rewriting, and we observe significant improvements in end-to-end runtimes
    over standard query execution and unconditional rewriting."
author:
- first_name: Daniela
  full_name: Böhm, Daniela
  last_name: Böhm
- first_name: Georg
  full_name: Gottlob, Georg
  last_name: Gottlob
- first_name: Matthias
  full_name: Lanzinger, Matthias
  last_name: Lanzinger
- first_name: Davide Mario
  full_name: Longo, Davide Mario
  last_name: Longo
- first_name: Cem
  full_name: Okulmus, Cem
  id: '114410'
  last_name: Okulmus
  orcid: 0000-0002-7742-0439
- first_name: Reinhard
  full_name: Pichler, Reinhard
  last_name: Pichler
- first_name: Alexander
  full_name: Selzer, Alexander
  last_name: Selzer
citation:
  ama: 'Böhm D, Gottlob G, Lanzinger M, et al. Selective Use of Yannakakis’ Algorithm
    for Consistent Performance Gains. In: <i>Proceedings of the 28th International
    Workshop on Design, Optimization, Languages and Analytical Processing of Big Data
    (DOLAP 2026)</i>. ; 2026.'
  apa: Böhm, D., Gottlob, G., Lanzinger, M., Longo, D. M., Okulmus, C., Pichler, R.,
    &#38; Selzer, A. (2026). Selective Use of Yannakakis’ Algorithm for Consistent
    Performance Gains. <i>Proceedings of the 28th International Workshop on Design,
    Optimization, Languages and Analytical Processing of Big Data (DOLAP 2026)</i>.
  bibtex: '@inproceedings{Böhm_Gottlob_Lanzinger_Longo_Okulmus_Pichler_Selzer_2026,
    place={Tampere, Finland}, title={Selective Use of Yannakakis’ Algorithm for Consistent
    Performance Gains}, booktitle={Proceedings of the 28th International Workshop
    on Design, Optimization, Languages and Analytical Processing of Big Data (DOLAP
    2026)}, author={Böhm, Daniela and Gottlob, Georg and Lanzinger, Matthias and Longo,
    Davide Mario and Okulmus, Cem and Pichler, Reinhard and Selzer, Alexander}, year={2026}
    }'
  chicago: Böhm, Daniela, Georg Gottlob, Matthias Lanzinger, Davide Mario Longo, Cem
    Okulmus, Reinhard Pichler, and Alexander Selzer. “Selective Use of Yannakakis’
    Algorithm for Consistent Performance Gains.” In <i>Proceedings of the 28th International
    Workshop on Design, Optimization, Languages and Analytical Processing of Big Data
    (DOLAP 2026)</i>. Tampere, Finland, 2026.
  ieee: D. Böhm <i>et al.</i>, “Selective Use of Yannakakis’ Algorithm for Consistent
    Performance Gains,” 2026.
  mla: Böhm, Daniela, et al. “Selective Use of Yannakakis’ Algorithm for Consistent
    Performance Gains.” <i>Proceedings of the 28th International Workshop on Design,
    Optimization, Languages and Analytical Processing of Big Data (DOLAP 2026)</i>,
    2026.
  short: 'D. Böhm, G. Gottlob, M. Lanzinger, D.M. Longo, C. Okulmus, R. Pichler, A.
    Selzer, in: Proceedings of the 28th International Workshop on Design, Optimization,
    Languages and Analytical Processing of Big Data (DOLAP 2026), Tampere, Finland,
    2026.'
date_created: 2026-03-27T15:20:54Z
date_updated: 2026-03-27T15:22:01Z
department:
- _id: '888'
keyword:
- Join Queries
- Acyclic Queries
- Query Processing
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://ceur-ws.org/Vol-4186/paper2.pdf
oa: '1'
place: Tampere, Finland
publication: Proceedings of the 28th International Workshop on Design, Optimization,
  Languages and Analytical Processing of Big Data (DOLAP 2026)
status: public
title: Selective Use of Yannakakis’ Algorithm for Consistent Performance Gains
type: conference
user_id: '114410'
year: '2026'
...
---
_id: '57580'
abstract:
- lang: eng
  text: We investigate dispersive and Strichartz estimates for the Schrödinger equation
    involving the fractional Laplacian in real hyperbolic spaces and their discrete
    analogues, homogeneous trees. Due to the Knapp phenomenon, the Strichartz estimates
    on Euclidean spaces for the fractional Laplacian exhibit loss of derivatives.
    A similar phenomenon appears on real hyperbolic spaces. However, such a loss disappears
    on homogeneous trees, due to the triviality of the estimates for small times.
author:
- first_name: Guendalina
  full_name: Palmirotta, Guendalina
  id: '109467'
  last_name: Palmirotta
- first_name: Yannick
  full_name: Sire, Yannick
  last_name: Sire
- first_name: Jean-Philippe
  full_name: Anker, Jean-Philippe
  last_name: Anker
citation:
  ama: Palmirotta G, Sire Y, Anker J-P. The Schrödinger equation with fractional Laplacian
    on hyperbolic spaces and homogeneous trees. <i>Journal of Differential Equations</i>.
    Published online 2026. doi:<a href="https://doi.org/10.1016/j.jde.2025.114065">10.1016/j.jde.2025.114065</a>
  apa: Palmirotta, G., Sire, Y., &#38; Anker, J.-P. (2026). The Schrödinger equation
    with fractional Laplacian on hyperbolic spaces and homogeneous trees. <i>Journal
    of Differential Equations</i>. <a href="https://doi.org/10.1016/j.jde.2025.114065">https://doi.org/10.1016/j.jde.2025.114065</a>
  bibtex: '@article{Palmirotta_Sire_Anker_2026, title={The Schrödinger equation with
    fractional Laplacian on hyperbolic spaces and homogeneous trees}, DOI={<a href="https://doi.org/10.1016/j.jde.2025.114065">10.1016/j.jde.2025.114065</a>},
    journal={Journal of Differential Equations}, publisher={Elsevier}, author={Palmirotta,
    Guendalina and Sire, Yannick and Anker, Jean-Philippe}, year={2026} }'
  chicago: Palmirotta, Guendalina, Yannick Sire, and Jean-Philippe Anker. “The Schrödinger
    Equation with Fractional Laplacian on Hyperbolic Spaces and Homogeneous Trees.”
    <i>Journal of Differential Equations</i>, 2026. <a href="https://doi.org/10.1016/j.jde.2025.114065">https://doi.org/10.1016/j.jde.2025.114065</a>.
  ieee: 'G. Palmirotta, Y. Sire, and J.-P. Anker, “The Schrödinger equation with fractional
    Laplacian on hyperbolic spaces and homogeneous trees,” <i>Journal of Differential
    Equations</i>, 2026, doi: <a href="https://doi.org/10.1016/j.jde.2025.114065">10.1016/j.jde.2025.114065</a>.'
  mla: Palmirotta, Guendalina, et al. “The Schrödinger Equation with Fractional Laplacian
    on Hyperbolic Spaces and Homogeneous Trees.” <i>Journal of Differential Equations</i>,
    Elsevier, 2026, doi:<a href="https://doi.org/10.1016/j.jde.2025.114065">10.1016/j.jde.2025.114065</a>.
  short: G. Palmirotta, Y. Sire, J.-P. Anker, Journal of Differential Equations (2026).
date_created: 2024-12-04T16:21:38Z
date_updated: 2026-03-30T12:03:37Z
department:
- _id: '10'
- _id: '548'
doi: 10.1016/j.jde.2025.114065
external_id:
  arxiv:
  - '2412.00780'
keyword:
- Schrödinger equation
- Fractional Laplacian
- Dispersive estimates
- Strichartz estimates
- Real hyperbolic spaces
- Homogeneous trees
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1016/j.jde.2025.114065
oa: '1'
project:
- _id: '356'
  name: 'TRR 358 - B02: TRR 358 - Spektraltheorie in höherem Rang und unendlichem
    Volumen (Teilprojekt B02)'
publication: Journal of Differential Equations
publication_status: published
publisher: Elsevier
related_material:
  link:
  - relation: confirmation
    url: https://www.sciencedirect.com/science/article/pii/S0022039625010927?via%3Dihub
status: public
title: The Schrödinger equation with fractional Laplacian on hyperbolic spaces and
  homogeneous trees
type: journal_article
user_id: '109467'
year: '2026'
...
---
_id: '65232'
abstract:
- lang: eng
  text: On finite regular graphs, we construct Patterson-Sullivan distributions associated
    with eigenfunctions of the discrete Laplace operator via their boundary values
    on the phase space. These distributions are closely related to Wigner distributions
    defined via a pseudo-differential calculus on graphs, which appear naturally in
    the study of quantum chaos. Using a pairing formula, we prove that Patterson-Sullivan
    distributions are also related to invariant Ruelle distributions arising from
    the transfer operator of the geodesic flow on the shift space. Both relationships
    provide discrete analogues of results for compact hyperbolic surfaces obtained
    by Anantharaman-Zelditch and by Guillarmou-Hilgert-Weich.
author:
- first_name: Christian
  full_name: Arends, Christian
  last_name: Arends
- first_name: Guendalina
  full_name: Palmirotta, Guendalina
  id: '109467'
  last_name: Palmirotta
citation:
  ama: Arends C, Palmirotta G. Patterson-Sullivan distributions of finite regular
    graphs. <i>arXiv:260309779</i>. Published online 2026.
  apa: Arends, C., &#38; Palmirotta, G. (2026). Patterson-Sullivan distributions of
    finite regular graphs. In <i>arXiv:2603.09779</i>.
  bibtex: '@article{Arends_Palmirotta_2026, title={Patterson-Sullivan distributions
    of finite regular graphs}, journal={arXiv:2603.09779}, author={Arends, Christian
    and Palmirotta, Guendalina}, year={2026} }'
  chicago: Arends, Christian, and Guendalina Palmirotta. “Patterson-Sullivan Distributions
    of Finite Regular Graphs.” <i>ArXiv:2603.09779</i>, 2026.
  ieee: C. Arends and G. Palmirotta, “Patterson-Sullivan distributions of finite regular
    graphs,” <i>arXiv:2603.09779</i>. 2026.
  mla: Arends, Christian, and Guendalina Palmirotta. “Patterson-Sullivan Distributions
    of Finite Regular Graphs.” <i>ArXiv:2603.09779</i>, 2026.
  short: C. Arends, G. Palmirotta, ArXiv:2603.09779 (2026).
date_created: 2026-03-30T11:56:04Z
date_updated: 2026-03-30T12:02:56Z
department:
- _id: '548'
- _id: '10'
- _id: '34'
external_id:
  arxiv:
  - '2603.09779'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2603.09779
oa: '1'
page: '38'
project:
- _id: '358'
  name: 'TRR 358; TP B04:  Geodätische Flüsse und Weyl Kammer Flüsse auf affinen Gebäuden'
publication: arXiv:2603.09779
status: public
title: Patterson-Sullivan distributions of finite regular graphs
type: preprint
user_id: '109467'
year: '2026'
...
---
_id: '63530'
abstract:
- lang: eng
  text: 'The widespread deployment of 5G networks, together with the coexistence of
    4G/LTE networks, provides mobile devices a diverse set of candidate cells to connect
    to. However, associating mobile devices to cells to maximize overall network performance,
    a.k.a. cell (re)selection, remains a key challenge for mobile operators. Today,
    cell (re)selection parameters are typically configured manually based on operator
    experience and rarely adapted to dynamic network conditions. In this work, we
    ask: Can an agent automatically learn and adapt cell (re)selection parameters
    to consistently improve network performance? We present a reinforcement learning
    (RL)-based framework called CellPilot that adaptively tunes cell (re)selection
    parameters by learning spatiotemporal patterns of mobile network dynamics. Our
    study with real-world data demonstrates that even a lightweight RL agent can outperform
    conventional heuristic reconfigurations by up to 167%, while generalizing effectively
    across different network scenarios. These results indicate that data-driven approaches
    can significantly improve cell (re)selection configurations and enhance mobile
    network performance.'
author:
- first_name: Marvin
  full_name: Illian, Marvin
  id: '44169'
  last_name: Illian
  orcid: 0009-0007-2992-8346
- first_name: Ramin
  full_name: Khalili, Ramin
  last_name: Khalili
- first_name: Antonio A. de A.
  full_name: Rocha, Antonio A. de A.
  last_name: Rocha
- first_name: Lin
  full_name: Wang, Lin
  id: '102868'
  last_name: Wang
  orcid: 0000-0001-7181-6128
citation:
  ama: 'Illian M, Khalili R, Rocha AA de A, Wang L. Cells on Autopilot: Adaptive Cell
    (Re)Selection via Reinforcement Learning. <i>arXiv:260104083</i>. Published online
    2026.'
  apa: 'Illian, M., Khalili, R., Rocha, A. A. de A., &#38; Wang, L. (2026). Cells
    on Autopilot: Adaptive Cell (Re)Selection via Reinforcement Learning. In <i>arXiv:2601.04083</i>.'
  bibtex: '@article{Illian_Khalili_Rocha_Wang_2026, title={Cells on Autopilot: Adaptive
    Cell (Re)Selection via Reinforcement Learning}, journal={arXiv:2601.04083}, author={Illian,
    Marvin and Khalili, Ramin and Rocha, Antonio A. de A. and Wang, Lin}, year={2026}
    }'
  chicago: 'Illian, Marvin, Ramin Khalili, Antonio A. de A. Rocha, and Lin Wang. “Cells
    on Autopilot: Adaptive Cell (Re)Selection via Reinforcement Learning.” <i>ArXiv:2601.04083</i>,
    2026.'
  ieee: 'M. Illian, R. Khalili, A. A. de A. Rocha, and L. Wang, “Cells on Autopilot:
    Adaptive Cell (Re)Selection via Reinforcement Learning,” <i>arXiv:2601.04083</i>.
    2026.'
  mla: 'Illian, Marvin, et al. “Cells on Autopilot: Adaptive Cell (Re)Selection via
    Reinforcement Learning.” <i>ArXiv:2601.04083</i>, 2026.'
  short: M. Illian, R. Khalili, A.A. de A. Rocha, L. Wang, ArXiv:2601.04083 (2026).
date_created: 2026-01-08T07:58:22Z
date_updated: 2026-03-31T06:44:22Z
department:
- _id: '75'
external_id:
  arxiv:
  - '2601.04083'
language:
- iso: eng
publication: arXiv:2601.04083
status: public
title: 'Cells on Autopilot: Adaptive Cell (Re)Selection via Reinforcement Learning'
type: preprint
user_id: '102868'
year: '2026'
...
---
_id: '65249'
author:
- first_name: Huzaifa
  full_name: Shaaban KabakiboKabakibo, Huzaifa
  last_name: Shaaban KabakiboKabakibo
- first_name: Animesh
  full_name: Trivedi, Animesh
  last_name: Trivedi
- first_name: Lin
  full_name: Wang, Lin
  id: '102868'
  last_name: Wang
  orcid: 0000-0001-7181-6128
citation:
  ama: 'Shaaban KabakiboKabakibo H, Trivedi A, Wang L. Breaking the Ice: Analyzing
    Cold Start Latency in vLLM. In: <i>The 9th Annual Conference on Machine Learning
    and Systems (MLSys)</i>. ; 2026.'
  apa: 'Shaaban KabakiboKabakibo, H., Trivedi, A., &#38; Wang, L. (2026). Breaking
    the Ice: Analyzing Cold Start Latency in vLLM. <i>The 9th Annual Conference on
    Machine Learning and Systems (MLSys)</i>. The 9th Annual Conference on Machine
    Learning and Systems (MLSys 2026) , Bellevue, WA.'
  bibtex: '@inproceedings{Shaaban KabakiboKabakibo_Trivedi_Wang_2026, title={Breaking
    the Ice: Analyzing Cold Start Latency in vLLM}, booktitle={The 9th Annual Conference
    on Machine Learning and Systems (MLSys)}, author={Shaaban KabakiboKabakibo, Huzaifa
    and Trivedi, Animesh and Wang, Lin}, year={2026} }'
  chicago: 'Shaaban KabakiboKabakibo, Huzaifa, Animesh Trivedi, and Lin Wang. “Breaking
    the Ice: Analyzing Cold Start Latency in VLLM.” In <i>The 9th Annual Conference
    on Machine Learning and Systems (MLSys)</i>, 2026.'
  ieee: 'H. Shaaban KabakiboKabakibo, A. Trivedi, and L. Wang, “Breaking the Ice:
    Analyzing Cold Start Latency in vLLM,” presented at the The 9th Annual Conference
    on Machine Learning and Systems (MLSys 2026) , Bellevue, WA, 2026.'
  mla: 'Shaaban KabakiboKabakibo, Huzaifa, et al. “Breaking the Ice: Analyzing Cold
    Start Latency in VLLM.” <i>The 9th Annual Conference on Machine Learning and Systems
    (MLSys)</i>, 2026.'
  short: 'H. Shaaban KabakiboKabakibo, A. Trivedi, L. Wang, in: The 9th Annual Conference
    on Machine Learning and Systems (MLSys), 2026.'
conference:
  end_date: 2026-05-22
  location: Bellevue, WA
  name: 'The 9th Annual Conference on Machine Learning and Systems (MLSys 2026) '
  start_date: 2026-05-18
date_created: 2026-03-31T06:34:37Z
date_updated: 2026-03-31T06:41:10Z
department:
- _id: '34'
- _id: '7'
- _id: '75'
language:
- iso: eng
publication: The 9th Annual Conference on Machine Learning and Systems (MLSys)
status: public
title: 'Breaking the Ice: Analyzing Cold Start Latency in vLLM'
type: conference
user_id: '102868'
year: '2026'
...
---
_id: '65250'
author:
- first_name: Sepideh
  full_name: Zohdi, Sepideh
  last_name: Zohdi
- first_name: Lin
  full_name: Wang, Lin
  id: '102868'
  last_name: Wang
  orcid: 0000-0001-7181-6128
citation:
  ama: 'Zohdi S, Wang L. Before the First Token: Benchmarking Data Preprocessing in
    Vision-Language Models . In: <i>The 6th Workshop on Machine Learning and Systems
    (EuroMLSys)</i>. ; 2026.'
  apa: 'Zohdi, S., &#38; Wang, L. (2026). Before the First Token: Benchmarking Data
    Preprocessing in Vision-Language Models . <i>The 6th Workshop on Machine Learning
    and Systems (EuroMLSys)</i>. The 6th Workshop on Machine Learning and Systems
    (EuroMLSys), Edinburg.'
  bibtex: '@inproceedings{Zohdi_Wang_2026, title={Before the First Token: Benchmarking
    Data Preprocessing in Vision-Language Models }, booktitle={The 6th Workshop on
    Machine Learning and Systems (EuroMLSys)}, author={Zohdi, Sepideh and Wang, Lin},
    year={2026} }'
  chicago: 'Zohdi, Sepideh, and Lin Wang. “Before the First Token: Benchmarking Data
    Preprocessing in Vision-Language Models .” In <i>The 6th Workshop on Machine Learning
    and Systems (EuroMLSys)</i>, 2026.'
  ieee: 'S. Zohdi and L. Wang, “Before the First Token: Benchmarking Data Preprocessing
    in Vision-Language Models ,” presented at the The 6th Workshop on Machine Learning
    and Systems (EuroMLSys), Edinburg, 2026.'
  mla: 'Zohdi, Sepideh, and Lin Wang. “Before the First Token: Benchmarking Data Preprocessing
    in Vision-Language Models .” <i>The 6th Workshop on Machine Learning and Systems
    (EuroMLSys)</i>, 2026.'
  short: 'S. Zohdi, L. Wang, in: The 6th Workshop on Machine Learning and Systems
    (EuroMLSys), 2026.'
conference:
  end_date: 2026-04-27
  location: Edinburg
  name: The 6th Workshop on Machine Learning and Systems (EuroMLSys)
  start_date: 2026-04-27
date_created: 2026-03-31T06:38:34Z
date_updated: 2026-03-31T06:39:41Z
department:
- _id: '34'
- _id: '7'
- _id: '75'
language:
- iso: eng
publication: The 6th Workshop on Machine Learning and Systems (EuroMLSys)
status: public
title: 'Before the First Token: Benchmarking Data Preprocessing in Vision-Language
  Models '
type: conference
user_id: '102868'
year: '2026'
...
---
_id: '65253'
article_number: '306'
author:
- first_name: Ali Hassan Ali
  full_name: Abdelwanis, Ali Hassan Ali
  last_name: Abdelwanis
- first_name: Barnabas
  full_name: Haucke-Korber, Barnabas
  id: '93461'
  last_name: Haucke-Korber
  orcid: 0000-0003-0862-2069
- first_name: Darius
  full_name: Jakobeit, Darius
  last_name: Jakobeit
- first_name: Wilhelm
  full_name: Kirchgässner, Wilhelm
  id: '49265'
  last_name: Kirchgässner
  orcid: 0000-0001-9490-1843
- first_name: Marvin
  full_name: Meyer, Marvin
  last_name: Meyer
- first_name: Maximilian
  full_name: Schenke, Maximilian
  id: '52638'
  last_name: Schenke
  orcid: 0000-0001-5427-9527
- first_name: Hendrik
  full_name: Vater, Hendrik
  id: '63220'
  last_name: Vater
- first_name: Oliver
  full_name: Wallscheid, Oliver
  id: '11291'
  last_name: Wallscheid
  orcid: https://orcid.org/0000-0001-9362-8777
- first_name: Daniel
  full_name: Weber, Daniel
  id: '24041'
  last_name: Weber
  orcid: 0000-0003-3367-5998
citation:
  ama: 'Abdelwanis AHA, Haucke-Korber B, Jakobeit D, et al. Reinforcement Learning:
    A Comprehensive Open-Source Course. <i>Journal of Open Source Education</i>. 2026;9(97).
    doi:<a href="https://doi.org/10.21105/jose.00306">10.21105/jose.00306</a>'
  apa: 'Abdelwanis, A. H. A., Haucke-Korber, B., Jakobeit, D., Kirchgässner, W., Meyer,
    M., Schenke, M., Vater, H., Wallscheid, O., &#38; Weber, D. (2026). Reinforcement
    Learning: A Comprehensive Open-Source Course. <i>Journal of Open Source Education</i>,
    <i>9</i>(97), Article 306. <a href="https://doi.org/10.21105/jose.00306">https://doi.org/10.21105/jose.00306</a>'
  bibtex: '@article{Abdelwanis_Haucke-Korber_Jakobeit_Kirchgässner_Meyer_Schenke_Vater_Wallscheid_Weber_2026,
    title={Reinforcement Learning: A Comprehensive Open-Source Course}, volume={9},
    DOI={<a href="https://doi.org/10.21105/jose.00306">10.21105/jose.00306</a>}, number={97306},
    journal={Journal of Open Source Education}, publisher={The Open Journal}, author={Abdelwanis,
    Ali Hassan Ali and Haucke-Korber, Barnabas and Jakobeit, Darius and Kirchgässner,
    Wilhelm and Meyer, Marvin and Schenke, Maximilian and Vater, Hendrik and Wallscheid,
    Oliver and Weber, Daniel}, year={2026} }'
  chicago: 'Abdelwanis, Ali Hassan Ali, Barnabas Haucke-Korber, Darius Jakobeit, Wilhelm
    Kirchgässner, Marvin Meyer, Maximilian Schenke, Hendrik Vater, Oliver Wallscheid,
    and Daniel Weber. “Reinforcement Learning: A Comprehensive Open-Source Course.”
    <i>Journal of Open Source Education</i> 9, no. 97 (2026). <a href="https://doi.org/10.21105/jose.00306">https://doi.org/10.21105/jose.00306</a>.'
  ieee: 'A. H. A. Abdelwanis <i>et al.</i>, “Reinforcement Learning: A Comprehensive
    Open-Source Course,” <i>Journal of Open Source Education</i>, vol. 9, no. 97,
    Art. no. 306, 2026, doi: <a href="https://doi.org/10.21105/jose.00306">10.21105/jose.00306</a>.'
  mla: 'Abdelwanis, Ali Hassan Ali, et al. “Reinforcement Learning: A Comprehensive
    Open-Source Course.” <i>Journal of Open Source Education</i>, vol. 9, no. 97,
    306, The Open Journal, 2026, doi:<a href="https://doi.org/10.21105/jose.00306">10.21105/jose.00306</a>.'
  short: A.H.A. Abdelwanis, B. Haucke-Korber, D. Jakobeit, W. Kirchgässner, M. Meyer,
    M. Schenke, H. Vater, O. Wallscheid, D. Weber, Journal of Open Source Education
    9 (2026).
date_created: 2026-03-31T07:30:04Z
date_updated: 2026-03-31T07:32:23Z
department:
- _id: '52'
doi: 10.21105/jose.00306
intvolume: '         9'
issue: '97'
language:
- iso: eng
publication: Journal of Open Source Education
publication_identifier:
  issn:
  - 2577-3569
publication_status: published
publisher: The Open Journal
status: public
title: 'Reinforcement Learning: A Comprehensive Open-Source Course'
type: journal_article
user_id: '93461'
volume: 9
year: '2026'
...
---
_id: '65440'
abstract:
- lang: eng
  text: "<jats:title>Abstract</jats:title>\r\n                  <jats:p>We present
    a novel algorithm for quantization and subsequent hexahedral mesh generation from
    seamless volumetric maps. Quantization is the process of choosing integers that
    represent the numbers of hexahedral elements to be placed in each region of the
    volume, and transforming the seamless map into an integer‐grid map matching that
    choice, inducing a hexahedral mesh. Previous work computes such quantizations
    under the restriction of a fixed predetermined singularity graph. Our novel approach
    allows for implicit modification and, in particular, simplification of the map's
    singularity structure wherever that benefits the chosen objective, such as matching
    target hexahedron sizes as closely as possible. It comes with two novel ingredients:
    A feature‐focused distortion measure guiding the quantization, and constraints
    ensuring map injectivity and structure preservation of geometric and topological
    features, both without relying on a fixed singularity structure. We demonstrate
    the benefit of the added flexibility offered by this approach: it allows for the
    generation of hexahedral meshes that more accurately match a desired resolution
    globally, as well as of meshes exhibiting a simpler block structure.</jats:p>"
article_number: e70349
author:
- first_name: Hendrik
  full_name: Brückler, Hendrik
  last_name: Brückler
- first_name: Marcel
  full_name: Campen, Marcel
  id: '114904'
  last_name: Campen
  orcid: 0000-0003-2340-3462
citation:
  ama: Brückler H, Campen M. Volume Quantization with Flexible Singularities for Hexahedral
    Meshing. <i>Computer Graphics Forum</i>. Published online 2026. doi:<a href="https://doi.org/10.1111/cgf.70349">10.1111/cgf.70349</a>
  apa: Brückler, H., &#38; Campen, M. (2026). Volume Quantization with Flexible Singularities
    for Hexahedral Meshing. <i>Computer Graphics Forum</i>, Article e70349. <a href="https://doi.org/10.1111/cgf.70349">https://doi.org/10.1111/cgf.70349</a>
  bibtex: '@article{Brückler_Campen_2026, title={Volume Quantization with Flexible
    Singularities for Hexahedral Meshing}, DOI={<a href="https://doi.org/10.1111/cgf.70349">10.1111/cgf.70349</a>},
    number={e70349}, journal={Computer Graphics Forum}, publisher={Wiley}, author={Brückler,
    Hendrik and Campen, Marcel}, year={2026} }'
  chicago: Brückler, Hendrik, and Marcel Campen. “Volume Quantization with Flexible
    Singularities for Hexahedral Meshing.” <i>Computer Graphics Forum</i>, 2026. <a
    href="https://doi.org/10.1111/cgf.70349">https://doi.org/10.1111/cgf.70349</a>.
  ieee: 'H. Brückler and M. Campen, “Volume Quantization with Flexible Singularities
    for Hexahedral Meshing,” <i>Computer Graphics Forum</i>, Art. no. e70349, 2026,
    doi: <a href="https://doi.org/10.1111/cgf.70349">10.1111/cgf.70349</a>.'
  mla: Brückler, Hendrik, and Marcel Campen. “Volume Quantization with Flexible Singularities
    for Hexahedral Meshing.” <i>Computer Graphics Forum</i>, e70349, Wiley, 2026,
    doi:<a href="https://doi.org/10.1111/cgf.70349">10.1111/cgf.70349</a>.
  short: H. Brückler, M. Campen, Computer Graphics Forum (2026).
date_created: 2026-04-15T07:32:52Z
date_updated: 2026-04-15T08:06:49Z
department:
- _id: '969'
doi: 10.1111/cgf.70349
language:
- iso: eng
publication: Computer Graphics Forum
publication_identifier:
  issn:
  - 0167-7055
  - 1467-8659
publication_status: published
publisher: Wiley
status: public
title: Volume Quantization with Flexible Singularities for Hexahedral Meshing
type: journal_article
user_id: '117512'
year: '2026'
...
---
_id: '65426'
abstract:
- lang: ger
  text: In diesem Forschungsprojekt wurde ein Messverfahren zur Bestimmung akustischer
    Materialparameter von Polymeren im Ultraschallfrequenzbereich entwickelt. Das
    Verfahrens sollte, die üblichen standardisierten Prüfmethoden erweitern, die bislang
    primär im quasistatischen oder niederfrequenten Bereich eingesetzt wurden. Im
    Gegensatz zu bestehenden Verfahren wie dem Zeitstandversuch oder der Dynamisch
    Mechanischen Analyse (DMA) nach [DIN6721] sollte die neue Methode eine nicht-invasive
    Charakterisierung der (visko-)elastischen Materialparameter im Frequenzbereich
    von 0,75 MHz bis 2,5 MHz ermöglichen. Das entwickelte Ultraschallmesssystem arbeitet
    nach dem Puls Echo-Prinzip und kann eine räumlich segmentierte, ringförmige Anregung
    erzeugen. Die Bestimmung der frequenzabhängigen Materialparameter geschieht hierbei
    über ein inverses Verfahren. Die Ergebnisse des Projekts zeigen, dass die Segmentierung
    der Anregung, die Geometrie der Probe sowie das Puls-Echo-Messprinzip die Messergebnisse
    sowie die Sensitivität gegenüber Scherparametern wesentlich beeinflussen. Im Rahmen
    des Projektes wurde auch eine statistische Auswertung des Optimierungsverfahrens
    hinsichtlich transversal-isotroper Materialsymmetrie mit Rayleigh-Dämpfung durchgeführt.
    Die Ergebnisse zeigen, dass das entwickelte Verfahren gute Konvergenzeigenschaften
    aufweist und sich durch verbesserte Robustheit auszeichnet.
- lang: eng
  text: This research project involved developing a measurement method to determine
    the acoustic material parameters of polymers within the ultrasonic frequency range.
    The aim of this method is to extend the range of standardised tests that operate
    in the quasi-static or low-frequency range. In contrast to existing methods such
    as the creep test or dynamic mechanical analysis according to [DIN6721], the developed
    method is capable of non-invasive characterisation of the (visco-)elastic material
    parameters in the frequency range of 0,75 MHz bis 2,5 MHz. The developed ultrasonic
    measurement setup utilises the pulse-echo principle and can generate a spatially
    segmented, ring-shaped excitation. The frequency-dependent material parameters
    are determined using an inverse method. The final results of the project show
    that the segmentation of the excitation, the geometry of the specimen and the
    pulse-echo measurement principle have a significant influence on the measurement
    results and the sensitivity to shear movements. As part of the project, a statistical
    evaluation of the optimisation process was also carried out with regard to transversely
    isotropic material symmetry with Rayleigh damping. The results show that the developed
    process has good convergence properties and is characterised by improved robustness.
author:
- first_name: Dmitrij
  full_name: Dreiling, Dmitrij
  id: '32616'
  last_name: Dreiling
- first_name: Dominik
  full_name: Itner, Dominik
  last_name: Itner
- first_name: Carolin
  full_name: Birk, Carolin
  last_name: Birk
- first_name: Hauke
  full_name: Gravenkamp, Hauke
  last_name: Gravenkamp
- first_name: Bernd
  full_name: Henning, Bernd
  id: '213'
  last_name: Henning
citation:
  ama: 'Dreiling D, Itner D, Birk C, Gravenkamp H, Henning B. <i>Vollständige Bestimmung
    der akustischen Materialparameter von Polymeren II</i>. Hannover : Technische
    Informationsbibliothek; 2026. doi:<a href="https://doi.org/10.34657/33602">https://doi.org/10.34657/33602</a>'
  apa: 'Dreiling, D., Itner, D., Birk, C., Gravenkamp, H., &#38; Henning, B. (2026).
    <i>Vollständige Bestimmung der akustischen Materialparameter von Polymeren II</i>.
    Hannover : Technische Informationsbibliothek. <a href="https://doi.org/10.34657/33602">https://doi.org/10.34657/33602</a>'
  bibtex: '@book{Dreiling_Itner_Birk_Gravenkamp_Henning_2026, title={Vollständige
    Bestimmung der akustischen Materialparameter von Polymeren II}, DOI={<a href="https://doi.org/10.34657/33602">https://doi.org/10.34657/33602</a>},
    publisher={Hannover : Technische Informationsbibliothek}, author={Dreiling, Dmitrij
    and Itner, Dominik and Birk, Carolin and Gravenkamp, Hauke and Henning, Bernd},
    year={2026} }'
  chicago: 'Dreiling, Dmitrij, Dominik Itner, Carolin Birk, Hauke Gravenkamp, and
    Bernd Henning. <i>Vollständige Bestimmung der akustischen Materialparameter von
    Polymeren II</i>. Hannover : Technische Informationsbibliothek, 2026. <a href="https://doi.org/10.34657/33602">https://doi.org/10.34657/33602</a>.'
  ieee: 'D. Dreiling, D. Itner, C. Birk, H. Gravenkamp, and B. Henning, <i>Vollständige
    Bestimmung der akustischen Materialparameter von Polymeren II</i>. Hannover :
    Technische Informationsbibliothek, 2026.'
  mla: 'Dreiling, Dmitrij, et al. <i>Vollständige Bestimmung der akustischen Materialparameter
    von Polymeren II</i>. Hannover : Technische Informationsbibliothek, 2026, doi:<a
    href="https://doi.org/10.34657/33602">https://doi.org/10.34657/33602</a>.'
  short: 'D. Dreiling, D. Itner, C. Birk, H. Gravenkamp, B. Henning, Vollständige
    Bestimmung der akustischen Materialparameter von Polymeren II, Hannover : Technische
    Informationsbibliothek, 2026.'
date_created: 2026-04-14T06:43:03Z
date_updated: 2026-04-17T07:18:16Z
department:
- _id: '49'
doi: https://doi.org/10.34657/33602
keyword:
- Materialcharakterisierung
- Polymer
- Inverses Problem
- Ultraschall
- Optimierung
language:
- iso: ger
main_file_link:
- open_access: '1'
  url: https://oa.tib.eu/renate/handle/123456789/34534
oa: '1'
page: '12'
project:
- _id: '89'
  name: Vollständige Bestimmung der akustischen Materialparameter von Polymeren
publication_status: published
publisher: 'Hannover : Technische Informationsbibliothek'
report_number: '409779252'
status: public
title: Vollständige Bestimmung der akustischen Materialparameter von Polymeren II
type: report
user_id: '32616'
year: '2026'
...
