---
_id: '62188'
author:
- first_name: Mats
  full_name: Vernholz, Mats
  id: '76955'
  last_name: Vernholz
  orcid: 0000-0001-5175-357X
- first_name: Gabriela
  full_name: Jonas-Ahrend, Gabriela
  id: '77633'
  last_name: Jonas-Ahrend
  orcid: 0000-0003-3898-954X
- first_name: Katrin
  full_name: Temmen, Katrin
  id: '30086'
  last_name: Temmen
citation:
  ama: 'Vernholz M, Jonas-Ahrend G, Temmen K. „Und ich sag mal, Theorie und Praxis
    ist zweierlei“. Wie können Praxisphasen Lehramtsstudierende auf zukünftige Anforderungen
    vorbereiten? . In: Wiemer T, Binder M, Penning I, eds. <i>Zukünfte technischer
    Bildung</i>. Vol 26. Jahrestagungen der Deutschen Gesellschaft für Technische
    Bildung e.V. . ; 2025. doi:<a href="https://doi.org/10.25932/publishup-67926">https://doi.org/10.25932/publishup-67926</a>'
  apa: Vernholz, M., Jonas-Ahrend, G., &#38; Temmen, K. (2025). „Und ich sag mal,
    Theorie und Praxis ist zweierlei“. Wie können Praxisphasen Lehramtsstudierende
    auf zukünftige Anforderungen vorbereiten? . In T. Wiemer, M. Binder, &#38; I.
    Penning (Eds.), <i>Zukünfte technischer Bildung</i> (Vol. 26). <a href="https://doi.org/10.25932/publishup-67926">https://doi.org/10.25932/publishup-67926</a>
  bibtex: '@inbook{Vernholz_Jonas-Ahrend_Temmen_2025, place={Universitätsverlag Potsdam},
    series={Jahrestagungen der Deutschen Gesellschaft für Technische Bildung e.V.
    }, title={„Und ich sag mal, Theorie und Praxis ist zweierlei“. Wie können Praxisphasen
    Lehramtsstudierende auf zukünftige Anforderungen vorbereiten? }, volume={26},
    DOI={<a href="https://doi.org/10.25932/publishup-67926">https://doi.org/10.25932/publishup-67926</a>},
    booktitle={Zukünfte technischer Bildung}, author={Vernholz, Mats and Jonas-Ahrend,
    Gabriela and Temmen, Katrin}, editor={Wiemer, Tobias and Binder, Martin and Penning,
    Isabelle}, year={2025}, collection={Jahrestagungen der Deutschen Gesellschaft
    für Technische Bildung e.V. } }'
  chicago: Vernholz, Mats, Gabriela Jonas-Ahrend, and Katrin Temmen. “„Und ich sag
    mal, Theorie und Praxis ist zweierlei“. Wie können Praxisphasen Lehramtsstudierende
    auf zukünftige Anforderungen vorbereiten? .” In <i>Zukünfte technischer Bildung</i>,
    edited by Tobias Wiemer, Martin Binder, and Isabelle Penning, Vol. 26. Jahrestagungen
    der Deutschen Gesellschaft für Technische Bildung e.V. . Universitätsverlag Potsdam,
    2025. <a href="https://doi.org/10.25932/publishup-67926">https://doi.org/10.25932/publishup-67926</a>.
  ieee: M. Vernholz, G. Jonas-Ahrend, and K. Temmen, “„Und ich sag mal, Theorie und
    Praxis ist zweierlei“. Wie können Praxisphasen Lehramtsstudierende auf zukünftige
    Anforderungen vorbereiten? ,” in <i>Zukünfte technischer Bildung</i>, vol. 26,
    T. Wiemer, M. Binder, and I. Penning, Eds. Universitätsverlag Potsdam, 2025.
  mla: Vernholz, Mats, et al. “„Und ich sag mal, Theorie und Praxis ist zweierlei“.
    Wie können Praxisphasen Lehramtsstudierende auf zukünftige Anforderungen vorbereiten?
    .” <i>Zukünfte technischer Bildung</i>, edited by Tobias Wiemer et al., vol. 26,
    2025, doi:<a href="https://doi.org/10.25932/publishup-67926">https://doi.org/10.25932/publishup-67926</a>.
  short: 'M. Vernholz, G. Jonas-Ahrend, K. Temmen, in: T. Wiemer, M. Binder, I. Penning
    (Eds.), Zukünfte technischer Bildung, Universitätsverlag Potsdam, 2025.'
conference:
  end_date: 2024-09-20
  location: Halle/Saale
  name: Deutsche Gesellschaft für Technische Bildung (DGTB)
  start_date: 2024-09-18
date_created: 2025-11-14T10:52:10Z
date_updated: 2026-02-17T07:52:34Z
ddc:
- '370'
department:
- _id: '300'
doi: https://doi.org/10.25932/publishup-67926
editor:
- first_name: Tobias
  full_name: Wiemer, Tobias
  last_name: Wiemer
- first_name: Martin
  full_name: Binder, Martin
  last_name: Binder
- first_name: Isabelle
  full_name: Penning, Isabelle
  last_name: Penning
file:
- access_level: closed
  content_type: application/pdf
  creator: maver001
  date_created: 2025-11-21T08:30:09Z
  date_updated: 2025-11-21T08:30:09Z
  file_id: '62273'
  file_name: dgtb26.pdf
  file_size: 9953811
  relation: main_file
  success: 1
file_date_updated: 2025-11-21T08:30:09Z
has_accepted_license: '1'
intvolume: '        26'
language:
- iso: ger
main_file_link:
- open_access: '1'
oa: '1'
place: Universitätsverlag Potsdam
publication: Zukünfte technischer Bildung
publication_status: published
series_title: 'Jahrestagungen der Deutschen Gesellschaft für Technische Bildung e.V. '
status: public
title: '„Und ich sag mal, Theorie und Praxis ist zweierlei“. Wie können Praxisphasen
  Lehramtsstudierende auf zukünftige Anforderungen vorbereiten? '
type: book_chapter
user_id: '76955'
volume: 26
year: '2025'
...
---
_id: '64188'
author:
- first_name: Gerson
  full_name: Meschut, Gerson
  id: '32056'
  last_name: Meschut
  orcid: 0000-0002-2763-1246
- first_name: Julian
  full_name: Gilich, Julian
  id: '44391'
  last_name: Gilich
- first_name: Maik
  full_name: Gude, Maik
  last_name: Gude
- first_name: Ilja
  full_name: Koch, Ilja
  last_name: Koch
- first_name: Benjamin
  full_name: Gröger, Benjamin
  last_name: Gröger
- first_name: Felix
  full_name: Wiebicke, Felix
  last_name: Wiebicke
citation:
  ama: Meschut G, Gilich J, Gude M, Koch I, Gröger B, Wiebicke F. <i>Experimentelle
    Und Numerische Untersuchung Des Fließverhaltens von Hochviskosen Wärmeleitstoffen
    Im Fertigungsprozess</i>. Vol 391. Forschungsvereinigung Automobiltechnik e.V.;
    2025.
  apa: Meschut, G., Gilich, J., Gude, M., Koch, I., Gröger, B., &#38; Wiebicke, F.
    (2025). <i>Experimentelle und numerische Untersuchung des Fließverhaltens von
    hochviskosen Wärmeleitstoffen im Fertigungsprozess</i> (Vol. 391). Forschungsvereinigung
    Automobiltechnik e.V.
  bibtex: '@book{Meschut_Gilich_Gude_Koch_Gröger_Wiebicke_2025, place={Berlin}, series={FAT-Schriftenreihe},
    title={Experimentelle und numerische Untersuchung des Fließverhaltens von hochviskosen
    Wärmeleitstoffen im Fertigungsprozess}, volume={391}, publisher={Forschungsvereinigung
    Automobiltechnik e.V.}, author={Meschut, Gerson and Gilich, Julian and Gude, Maik
    and Koch, Ilja and Gröger, Benjamin and Wiebicke, Felix}, year={2025}, collection={FAT-Schriftenreihe}
    }'
  chicago: 'Meschut, Gerson, Julian Gilich, Maik Gude, Ilja Koch, Benjamin Gröger,
    and Felix Wiebicke. <i>Experimentelle Und Numerische Untersuchung Des Fließverhaltens
    von Hochviskosen Wärmeleitstoffen Im Fertigungsprozess</i>. Vol. 391. FAT-Schriftenreihe.
    Berlin: Forschungsvereinigung Automobiltechnik e.V., 2025.'
  ieee: 'G. Meschut, J. Gilich, M. Gude, I. Koch, B. Gröger, and F. Wiebicke, <i>Experimentelle
    und numerische Untersuchung des Fließverhaltens von hochviskosen Wärmeleitstoffen
    im Fertigungsprozess</i>, vol. 391. Berlin: Forschungsvereinigung Automobiltechnik
    e.V., 2025.'
  mla: Meschut, Gerson, et al. <i>Experimentelle Und Numerische Untersuchung Des Fließverhaltens
    von Hochviskosen Wärmeleitstoffen Im Fertigungsprozess</i>. Forschungsvereinigung
    Automobiltechnik e.V., 2025.
  short: G. Meschut, J. Gilich, M. Gude, I. Koch, B. Gröger, F. Wiebicke, Experimentelle
    Und Numerische Untersuchung Des Fließverhaltens von Hochviskosen Wärmeleitstoffen
    Im Fertigungsprozess, Forschungsvereinigung Automobiltechnik e.V., Berlin, 2025.
date_created: 2026-02-17T13:18:21Z
date_updated: 2026-02-17T13:21:05Z
department:
- _id: '157'
intvolume: '       391'
language:
- iso: eng
place: Berlin
publisher: Forschungsvereinigung Automobiltechnik e.V.
series_title: FAT-Schriftenreihe
status: public
title: Experimentelle und numerische Untersuchung des Fließverhaltens von hochviskosen
  Wärmeleitstoffen im Fertigungsprozess
type: book
user_id: '44391'
volume: 391
year: '2025'
...
---
_id: '55459'
article_type: original
author:
- first_name: Nils
  full_name: Bullerjahn, Nils
  id: '103797'
  last_name: Bullerjahn
  orcid: https://orcid.org/0009-0003-8460-1574
- first_name: Balázs
  full_name: Kovács, Balázs
  id: '100441'
  last_name: Kovács
  orcid: 0000-0001-9872-3474
citation:
  ama: Bullerjahn N, Kovács B. Error estimates for full discretization of Cahn--Hilliard
    equation with dynamic boundary conditions. <i>IMA Journal of Numerical Analysis</i>.
    doi:<a href="https://doi.org/10.1093/imanum/draf009">10.1093/imanum/draf009</a>
  apa: Bullerjahn, N., &#38; Kovács, B. (n.d.). Error estimates for full discretization
    of Cahn--Hilliard equation with dynamic boundary conditions. <i>IMA Journal of
    Numerical Analysis</i>. <a href="https://doi.org/10.1093/imanum/draf009">https://doi.org/10.1093/imanum/draf009</a>
  bibtex: '@article{Bullerjahn_Kovács, title={Error estimates for full discretization
    of Cahn--Hilliard equation with dynamic boundary conditions}, DOI={<a href="https://doi.org/10.1093/imanum/draf009">10.1093/imanum/draf009</a>},
    journal={IMA Journal of Numerical Analysis}, author={Bullerjahn, Nils and Kovács,
    Balázs} }'
  chicago: Bullerjahn, Nils, and Balázs Kovács. “Error Estimates for Full Discretization
    of Cahn--Hilliard Equation with Dynamic Boundary Conditions.” <i>IMA Journal of
    Numerical Analysis</i>, n.d. <a href="https://doi.org/10.1093/imanum/draf009">https://doi.org/10.1093/imanum/draf009</a>.
  ieee: 'N. Bullerjahn and B. Kovács, “Error estimates for full discretization of
    Cahn--Hilliard equation with dynamic boundary conditions,” <i>IMA Journal of Numerical
    Analysis</i>, doi: <a href="https://doi.org/10.1093/imanum/draf009">10.1093/imanum/draf009</a>.'
  mla: Bullerjahn, Nils, and Balázs Kovács. “Error Estimates for Full Discretization
    of Cahn--Hilliard Equation with Dynamic Boundary Conditions.” <i>IMA Journal of
    Numerical Analysis</i>, doi:<a href="https://doi.org/10.1093/imanum/draf009">10.1093/imanum/draf009</a>.
  short: N. Bullerjahn, B. Kovács, IMA Journal of Numerical Analysis (n.d.).
date_created: 2024-07-31T09:03:45Z
date_updated: 2026-02-18T14:46:18Z
department:
- _id: '841'
doi: 10.1093/imanum/draf009
language:
- iso: eng
publication: IMA Journal of Numerical Analysis
publication_status: accepted
status: public
title: Error estimates for full discretization of Cahn--Hilliard equation with dynamic
  boundary conditions
type: journal_article
user_id: '100441'
year: '2025'
...
---
_id: '53141'
author:
- first_name: Dominik
  full_name: Edelmann, Dominik
  last_name: Edelmann
- first_name: Balázs
  full_name: Kovács, Balázs
  id: '100441'
  last_name: Kovács
  orcid: 0000-0001-9872-3474
- first_name: Christian
  full_name: Lubich, Christian
  last_name: Lubich
citation:
  ama: Edelmann D, Kovács B, Lubich C. Numerical analysis of an evolving bulk--surface
    model of tumour growth. <i>IMA Journal of Numerical Analysis</i>. 2025;45(5):2581--2627.
    doi:<a href="https://doi.org/10.1093/imanum/drae077">10.1093/imanum/drae077</a>
  apa: Edelmann, D., Kovács, B., &#38; Lubich, C. (2025). Numerical analysis of an
    evolving bulk--surface model of tumour growth. <i>IMA Journal of Numerical Analysis</i>,
    <i>45</i>(5), 2581--2627. <a href="https://doi.org/10.1093/imanum/drae077">https://doi.org/10.1093/imanum/drae077</a>
  bibtex: '@article{Edelmann_Kovács_Lubich_2025, title={Numerical analysis of an evolving
    bulk--surface model of tumour growth}, volume={45}, DOI={<a href="https://doi.org/10.1093/imanum/drae077">10.1093/imanum/drae077</a>},
    number={5}, journal={IMA Journal of Numerical Analysis}, author={Edelmann, Dominik
    and Kovács, Balázs and Lubich, Christian}, year={2025}, pages={2581--2627} }'
  chicago: 'Edelmann, Dominik, Balázs Kovács, and Christian Lubich. “Numerical Analysis
    of an Evolving Bulk--Surface Model of Tumour Growth.” <i>IMA Journal of Numerical
    Analysis</i> 45, no. 5 (2025): 2581--2627. <a href="https://doi.org/10.1093/imanum/drae077">https://doi.org/10.1093/imanum/drae077</a>.'
  ieee: 'D. Edelmann, B. Kovács, and C. Lubich, “Numerical analysis of an evolving
    bulk--surface model of tumour growth,” <i>IMA Journal of Numerical Analysis</i>,
    vol. 45, no. 5, pp. 2581--2627, 2025, doi: <a href="https://doi.org/10.1093/imanum/drae077">10.1093/imanum/drae077</a>.'
  mla: Edelmann, Dominik, et al. “Numerical Analysis of an Evolving Bulk--Surface
    Model of Tumour Growth.” <i>IMA Journal of Numerical Analysis</i>, vol. 45, no.
    5, 2025, pp. 2581--2627, doi:<a href="https://doi.org/10.1093/imanum/drae077">10.1093/imanum/drae077</a>.
  short: D. Edelmann, B. Kovács, C. Lubich, IMA Journal of Numerical Analysis 45 (2025)
    2581--2627.
date_created: 2024-04-03T09:11:36Z
date_updated: 2026-02-18T14:44:54Z
department:
- _id: '841'
doi: 10.1093/imanum/drae077
intvolume: '        45'
issue: '5'
language:
- iso: eng
page: 2581--2627
publication: IMA Journal of Numerical Analysis
status: public
title: Numerical analysis of an evolving bulk--surface model of tumour growth
type: journal_article
user_id: '100441'
volume: 45
year: '2025'
...
---
_id: '55781'
abstract:
- lang: eng
  text: "In this paper, we prove that spatially semi-discrete evolving finite element\r\nmethod
    for parabolic equations on a given evolving hypersurface of arbitrary\r\ndimensions
    preserves the maximal $L^p$-regularity at the discrete level. We\r\nfirst establish
    the results on a stationary surface and then extend them, via a\r\nperturbation
    argument, to the case where the underlying surface is evolving\r\nunder a prescribed
    velocity field. The proof combines techniques in evolving\r\nfinite element method,
    properties of Green's functions on (discretised) closed\r\nsurfaces, and local
    energy estimates for finite element methods"
author:
- first_name: Genming
  full_name: Bai, Genming
  last_name: Bai
- first_name: Balázs
  full_name: Kovács, Balázs
  id: '100441'
  last_name: Kovács
  orcid: 0000-0001-9872-3474
- first_name: Buyang
  full_name: Li, Buyang
  last_name: Li
citation:
  ama: Bai G, Kovács B, Li B. Maximal regularity of evolving FEMs for parabolic equations
    on an  evolving surface. <i>IMA Journal of Numerical Analysis</i>. Published online
    2025. doi:<a href="https://doi.org/10.1093/imanum/draf082.">10.1093/imanum/draf082.</a>
  apa: Bai, G., Kovács, B., &#38; Li, B. (2025). Maximal regularity of evolving FEMs
    for parabolic equations on an  evolving surface. <i>IMA Journal of Numerical Analysis</i>.
    <a href="https://doi.org/10.1093/imanum/draf082.">https://doi.org/10.1093/imanum/draf082.</a>
  bibtex: '@article{Bai_Kovács_Li_2025, title={Maximal regularity of evolving FEMs
    for parabolic equations on an  evolving surface}, DOI={<a href="https://doi.org/10.1093/imanum/draf082.">10.1093/imanum/draf082.</a>},
    journal={IMA Journal of Numerical Analysis}, author={Bai, Genming and Kovács,
    Balázs and Li, Buyang}, year={2025} }'
  chicago: Bai, Genming, Balázs Kovács, and Buyang Li. “Maximal Regularity of Evolving
    FEMs for Parabolic Equations on an  Evolving Surface.” <i>IMA Journal of Numerical
    Analysis</i>, 2025. <a href="https://doi.org/10.1093/imanum/draf082.">https://doi.org/10.1093/imanum/draf082.</a>
  ieee: 'G. Bai, B. Kovács, and B. Li, “Maximal regularity of evolving FEMs for parabolic
    equations on an  evolving surface,” <i>IMA Journal of Numerical Analysis</i>,
    2025, doi: <a href="https://doi.org/10.1093/imanum/draf082.">10.1093/imanum/draf082.</a>'
  mla: Bai, Genming, et al. “Maximal Regularity of Evolving FEMs for Parabolic Equations
    on an  Evolving Surface.” <i>IMA Journal of Numerical Analysis</i>, 2025, doi:<a
    href="https://doi.org/10.1093/imanum/draf082.">10.1093/imanum/draf082.</a>
  short: G. Bai, B. Kovács, B. Li, IMA Journal of Numerical Analysis (2025).
date_created: 2024-08-27T07:37:39Z
date_updated: 2026-02-18T14:47:34Z
department:
- _id: '841'
doi: 10.1093/imanum/draf082.
external_id:
  arxiv:
  - '2408.14096'
language:
- iso: eng
publication: IMA Journal of Numerical Analysis
status: public
title: Maximal regularity of evolving FEMs for parabolic equations on an  evolving
  surface
type: journal_article
user_id: '100441'
year: '2025'
...
---
_id: '64219'
author:
- first_name: Jannis
  full_name: Graunke, Jannis
  last_name: Graunke
- first_name: Isaac Mpidi
  full_name: Bita, Isaac Mpidi
  last_name: Bita
- first_name: Dominik
  full_name: Hermelingmeier, Dominik
  last_name: Hermelingmeier
- first_name: Lynn
  full_name: Humpert, Lynn
  last_name: Humpert
- first_name: Anja
  full_name: Schierbaum, Anja
  last_name: Schierbaum
- first_name: Roman
  full_name: Dumitrescu, Roman
  id: '16190'
  last_name: Dumitrescu
citation:
  ama: 'Graunke J, Bita IM, Hermelingmeier D, Humpert L, Schierbaum A, Dumitrescu
    R. Evolving Modularity: Rethinking Architecture in Product and Organizational
    Systems. In: <i>2025 IEEE International Conference on Recent Advances in Systems
    Science and Engineering (RASSE)</i>. IEEE; 2025. doi:<a href="https://doi.org/10.1109/rasse64831.2025.11315315">10.1109/rasse64831.2025.11315315</a>'
  apa: 'Graunke, J., Bita, I. M., Hermelingmeier, D., Humpert, L., Schierbaum, A.,
    &#38; Dumitrescu, R. (2025). Evolving Modularity: Rethinking Architecture in Product
    and Organizational Systems. <i>2025 IEEE International Conference on Recent Advances
    in Systems Science and Engineering (RASSE)</i>. <a href="https://doi.org/10.1109/rasse64831.2025.11315315">https://doi.org/10.1109/rasse64831.2025.11315315</a>'
  bibtex: '@inproceedings{Graunke_Bita_Hermelingmeier_Humpert_Schierbaum_Dumitrescu_2025,
    title={Evolving Modularity: Rethinking Architecture in Product and Organizational
    Systems}, DOI={<a href="https://doi.org/10.1109/rasse64831.2025.11315315">10.1109/rasse64831.2025.11315315</a>},
    booktitle={2025 IEEE International Conference on Recent Advances in Systems Science
    and Engineering (RASSE)}, publisher={IEEE}, author={Graunke, Jannis and Bita,
    Isaac Mpidi and Hermelingmeier, Dominik and Humpert, Lynn and Schierbaum, Anja
    and Dumitrescu, Roman}, year={2025} }'
  chicago: 'Graunke, Jannis, Isaac Mpidi Bita, Dominik Hermelingmeier, Lynn Humpert,
    Anja Schierbaum, and Roman Dumitrescu. “Evolving Modularity: Rethinking Architecture
    in Product and Organizational Systems.” In <i>2025 IEEE International Conference
    on Recent Advances in Systems Science and Engineering (RASSE)</i>. IEEE, 2025.
    <a href="https://doi.org/10.1109/rasse64831.2025.11315315">https://doi.org/10.1109/rasse64831.2025.11315315</a>.'
  ieee: 'J. Graunke, I. M. Bita, D. Hermelingmeier, L. Humpert, A. Schierbaum, and
    R. Dumitrescu, “Evolving Modularity: Rethinking Architecture in Product and Organizational
    Systems,” 2025, doi: <a href="https://doi.org/10.1109/rasse64831.2025.11315315">10.1109/rasse64831.2025.11315315</a>.'
  mla: 'Graunke, Jannis, et al. “Evolving Modularity: Rethinking Architecture in Product
    and Organizational Systems.” <i>2025 IEEE International Conference on Recent Advances
    in Systems Science and Engineering (RASSE)</i>, IEEE, 2025, doi:<a href="https://doi.org/10.1109/rasse64831.2025.11315315">10.1109/rasse64831.2025.11315315</a>.'
  short: 'J. Graunke, I.M. Bita, D. Hermelingmeier, L. Humpert, A. Schierbaum, R.
    Dumitrescu, in: 2025 IEEE International Conference on Recent Advances in Systems
    Science and Engineering (RASSE), IEEE, 2025.'
date_created: 2026-02-19T08:52:59Z
date_updated: 2026-02-19T08:53:26Z
department:
- _id: '563'
doi: 10.1109/rasse64831.2025.11315315
language:
- iso: eng
publication: 2025 IEEE International Conference on Recent Advances in Systems Science
  and Engineering (RASSE)
publication_status: published
publisher: IEEE
status: public
title: 'Evolving Modularity: Rethinking Architecture in Product and Organizational
  Systems'
type: conference
user_id: '15782'
year: '2025'
...
---
_id: '64220'
author:
- first_name: Jan-Philipp
  full_name: Disselkamp, Jan-Philipp
  last_name: Disselkamp
- first_name: Tobias
  full_name: Seidenberg, Tobias
  last_name: Seidenberg
- first_name: Jonas
  full_name: Lick, Jonas
  last_name: Lick
- first_name: Roman
  full_name: Dumitrescu, Roman
  id: '16190'
  last_name: Dumitrescu
citation:
  ama: 'Disselkamp J-P, Seidenberg T, Lick J, Dumitrescu R. 24 Reasons for the Failure
    of Integrative and Integrated Product and Production System Development Methods.
    In: <i>2025 IEEE International Conference on Recent Advances in Systems Science
    and Engineering (RASSE)</i>. IEEE; 2025. doi:<a href="https://doi.org/10.1109/rasse64831.2025.11315397">10.1109/rasse64831.2025.11315397</a>'
  apa: Disselkamp, J.-P., Seidenberg, T., Lick, J., &#38; Dumitrescu, R. (2025). 24
    Reasons for the Failure of Integrative and Integrated Product and Production System
    Development Methods. <i>2025 IEEE International Conference on Recent Advances
    in Systems Science and Engineering (RASSE)</i>. <a href="https://doi.org/10.1109/rasse64831.2025.11315397">https://doi.org/10.1109/rasse64831.2025.11315397</a>
  bibtex: '@inproceedings{Disselkamp_Seidenberg_Lick_Dumitrescu_2025, title={24 Reasons
    for the Failure of Integrative and Integrated Product and Production System Development
    Methods}, DOI={<a href="https://doi.org/10.1109/rasse64831.2025.11315397">10.1109/rasse64831.2025.11315397</a>},
    booktitle={2025 IEEE International Conference on Recent Advances in Systems Science
    and Engineering (RASSE)}, publisher={IEEE}, author={Disselkamp, Jan-Philipp and
    Seidenberg, Tobias and Lick, Jonas and Dumitrescu, Roman}, year={2025} }'
  chicago: Disselkamp, Jan-Philipp, Tobias Seidenberg, Jonas Lick, and Roman Dumitrescu.
    “24 Reasons for the Failure of Integrative and Integrated Product and Production
    System Development Methods.” In <i>2025 IEEE International Conference on Recent
    Advances in Systems Science and Engineering (RASSE)</i>. IEEE, 2025. <a href="https://doi.org/10.1109/rasse64831.2025.11315397">https://doi.org/10.1109/rasse64831.2025.11315397</a>.
  ieee: 'J.-P. Disselkamp, T. Seidenberg, J. Lick, and R. Dumitrescu, “24 Reasons
    for the Failure of Integrative and Integrated Product and Production System Development
    Methods,” 2025, doi: <a href="https://doi.org/10.1109/rasse64831.2025.11315397">10.1109/rasse64831.2025.11315397</a>.'
  mla: Disselkamp, Jan-Philipp, et al. “24 Reasons for the Failure of Integrative
    and Integrated Product and Production System Development Methods.” <i>2025 IEEE
    International Conference on Recent Advances in Systems Science and Engineering
    (RASSE)</i>, IEEE, 2025, doi:<a href="https://doi.org/10.1109/rasse64831.2025.11315397">10.1109/rasse64831.2025.11315397</a>.
  short: 'J.-P. Disselkamp, T. Seidenberg, J. Lick, R. Dumitrescu, in: 2025 IEEE International
    Conference on Recent Advances in Systems Science and Engineering (RASSE), IEEE,
    2025.'
date_created: 2026-02-19T08:54:26Z
date_updated: 2026-02-19T09:00:40Z
department:
- _id: '563'
doi: 10.1109/rasse64831.2025.11315397
language:
- iso: eng
publication: 2025 IEEE International Conference on Recent Advances in Systems Science
  and Engineering (RASSE)
publication_status: published
publisher: IEEE
status: public
title: 24 Reasons for the Failure of Integrative and Integrated Product and Production
  System Development Methods
type: conference
user_id: '15782'
year: '2025'
...
---
_id: '64222'
author:
- first_name: Patrick
  full_name: Ködding, Patrick
  last_name: Ködding
- first_name: Christian
  full_name: Koldewey, Christian
  id: '43136'
  last_name: Koldewey
  orcid: https://orcid.org/0000-0001-7992-6399
- first_name: Roman
  full_name: Dumitrescu, Roman
  id: '16190'
  last_name: Dumitrescu
citation:
  ama: Ködding P, Koldewey C, Dumitrescu R. Tailoring scenario projects with method
    and tool building blocks. <i>IEEE Engineering Management Review</i>. Published
    online 2025:1-9. doi:<a href="https://doi.org/10.1109/emr.2025.3646110">10.1109/emr.2025.3646110</a>
  apa: Ködding, P., Koldewey, C., &#38; Dumitrescu, R. (2025). Tailoring scenario
    projects with method and tool building blocks. <i>IEEE Engineering Management
    Review</i>, 1–9. <a href="https://doi.org/10.1109/emr.2025.3646110">https://doi.org/10.1109/emr.2025.3646110</a>
  bibtex: '@article{Ködding_Koldewey_Dumitrescu_2025, title={Tailoring scenario projects
    with method and tool building blocks}, DOI={<a href="https://doi.org/10.1109/emr.2025.3646110">10.1109/emr.2025.3646110</a>},
    journal={IEEE Engineering Management Review}, publisher={Institute of Electrical
    and Electronics Engineers (IEEE)}, author={Ködding, Patrick and Koldewey, Christian
    and Dumitrescu, Roman}, year={2025}, pages={1–9} }'
  chicago: Ködding, Patrick, Christian Koldewey, and Roman Dumitrescu. “Tailoring
    Scenario Projects with Method and Tool Building Blocks.” <i>IEEE Engineering Management
    Review</i>, 2025, 1–9. <a href="https://doi.org/10.1109/emr.2025.3646110">https://doi.org/10.1109/emr.2025.3646110</a>.
  ieee: 'P. Ködding, C. Koldewey, and R. Dumitrescu, “Tailoring scenario projects
    with method and tool building blocks,” <i>IEEE Engineering Management Review</i>,
    pp. 1–9, 2025, doi: <a href="https://doi.org/10.1109/emr.2025.3646110">10.1109/emr.2025.3646110</a>.'
  mla: Ködding, Patrick, et al. “Tailoring Scenario Projects with Method and Tool
    Building Blocks.” <i>IEEE Engineering Management Review</i>, Institute of Electrical
    and Electronics Engineers (IEEE), 2025, pp. 1–9, doi:<a href="https://doi.org/10.1109/emr.2025.3646110">10.1109/emr.2025.3646110</a>.
  short: P. Ködding, C. Koldewey, R. Dumitrescu, IEEE Engineering Management Review
    (2025) 1–9.
date_created: 2026-02-19T08:57:25Z
date_updated: 2026-02-19T09:00:33Z
department:
- _id: '563'
doi: 10.1109/emr.2025.3646110
language:
- iso: eng
page: 1-9
publication: IEEE Engineering Management Review
publication_identifier:
  issn:
  - 0360-8581
  - 1937-4178
publication_status: published
publisher: Institute of Electrical and Electronics Engineers (IEEE)
status: public
title: Tailoring scenario projects with method and tool building blocks
type: journal_article
user_id: '15782'
year: '2025'
...
---
_id: '64229'
abstract:
- lang: eng
  text: <jats:title>ABSTRACT:</jats:title><jats:p>This paper presents the MBSE-Graph-RAG
    framework to address key challenges in Model-Based Systems Engineering (MBSE).
    Traditional MBSE tools suffer from usability barriers, limited accessibility,
    and integration challenges. By combining knowledge graphs with Retrieval-Augmented
    Generation (RAG), the proposed framework enables AI-Augmented engineering through
    natural language interactions and automated system architecture generation. A
    systematic literature review establishes a solid research foundation, identifying
    gaps in AI-assisted MBSE. Key contributions include a structured MBSE-Graph interface,
    improved usability via Large Language Models (LLMs), and automated graph construction
    aligned with SysML. A proof-of-concept demonstrates the potential of this approach
    to enhance MBSE by reducing complexity, improving data accessibility, and supporting
    engineering collaboration.</jats:p>
author:
- first_name: Fabian
  full_name: Hanke, Fabian
  last_name: Hanke
- first_name: 'Isaac '
  full_name: 'Mpidi Bita, Isaac '
  last_name: Mpidi Bita
- first_name: 'Oliver '
  full_name: 'von Heißen, Oliver '
  last_name: von Heißen
- first_name: Julian
  full_name: Weller, Julian
  last_name: Weller
- first_name: Aschot
  full_name: Hovemann, Aschot
  last_name: Hovemann
- first_name: Roman
  full_name: Dumitrescu, Roman
  id: '16190'
  last_name: Dumitrescu
citation:
  ama: 'Hanke F, Mpidi Bita I, von Heißen O, Weller J, Hovemann A, Dumitrescu R. AI-augmented
    systems engineering: conceptual application of retrieval-augmented generation
    for model-based systems engineering graph. In: <i>Proceedings of the Design Society</i>.
    Vol 5. Cambridge University Press (CUP); 2025:439-448. doi:<a href="https://doi.org/10.1017/pds.2025.10058">10.1017/pds.2025.10058</a>'
  apa: 'Hanke, F., Mpidi Bita, I., von Heißen, O., Weller, J., Hovemann, A., &#38;
    Dumitrescu, R. (2025). AI-augmented systems engineering: conceptual application
    of retrieval-augmented generation for model-based systems engineering graph. <i>Proceedings
    of the Design Society</i>, <i>5</i>, 439–448. <a href="https://doi.org/10.1017/pds.2025.10058">https://doi.org/10.1017/pds.2025.10058</a>'
  bibtex: '@inproceedings{Hanke_Mpidi Bita_von Heißen_Weller_Hovemann_Dumitrescu_2025,
    title={AI-augmented systems engineering: conceptual application of retrieval-augmented
    generation for model-based systems engineering graph}, volume={5}, DOI={<a href="https://doi.org/10.1017/pds.2025.10058">10.1017/pds.2025.10058</a>},
    booktitle={Proceedings of the Design Society}, publisher={Cambridge University
    Press (CUP)}, author={Hanke, Fabian and Mpidi Bita, Isaac  and von Heißen, Oliver  and
    Weller, Julian and Hovemann, Aschot and Dumitrescu, Roman}, year={2025}, pages={439–448}
    }'
  chicago: 'Hanke, Fabian, Isaac  Mpidi Bita, Oliver  von Heißen, Julian Weller, Aschot
    Hovemann, and Roman Dumitrescu. “AI-Augmented Systems Engineering: Conceptual
    Application of Retrieval-Augmented Generation for Model-Based Systems Engineering
    Graph.” In <i>Proceedings of the Design Society</i>, 5:439–48. Cambridge University
    Press (CUP), 2025. <a href="https://doi.org/10.1017/pds.2025.10058">https://doi.org/10.1017/pds.2025.10058</a>.'
  ieee: 'F. Hanke, I. Mpidi Bita, O. von Heißen, J. Weller, A. Hovemann, and R. Dumitrescu,
    “AI-augmented systems engineering: conceptual application of retrieval-augmented
    generation for model-based systems engineering graph,” in <i>Proceedings of the
    Design Society</i>, 2025, vol. 5, pp. 439–448, doi: <a href="https://doi.org/10.1017/pds.2025.10058">10.1017/pds.2025.10058</a>.'
  mla: 'Hanke, Fabian, et al. “AI-Augmented Systems Engineering: Conceptual Application
    of Retrieval-Augmented Generation for Model-Based Systems Engineering Graph.”
    <i>Proceedings of the Design Society</i>, vol. 5, Cambridge University Press (CUP),
    2025, pp. 439–48, doi:<a href="https://doi.org/10.1017/pds.2025.10058">10.1017/pds.2025.10058</a>.'
  short: 'F. Hanke, I. Mpidi Bita, O. von Heißen, J. Weller, A. Hovemann, R. Dumitrescu,
    in: Proceedings of the Design Society, Cambridge University Press (CUP), 2025,
    pp. 439–448.'
date_created: 2026-02-19T09:13:22Z
date_updated: 2026-02-19T09:15:00Z
department:
- _id: '563'
doi: 10.1017/pds.2025.10058
intvolume: '         5'
language:
- iso: eng
page: 439-448
publication: Proceedings of the Design Society
publication_identifier:
  issn:
  - 2732-527X
publication_status: published
publisher: Cambridge University Press (CUP)
status: public
title: 'AI-augmented systems engineering: conceptual application of retrieval-augmented
  generation for model-based systems engineering graph'
type: conference
user_id: '15782'
volume: 5
year: '2025'
...
---
_id: '64253'
abstract:
- lang: eng
  text: <jats:p>This paper presents a comprehensive design framework for Enterprise
    Architecture aimed at facilitating decision-driven analytics in smart factories.
    The motivation behind this research lies in challenges faced by manufacturing
    companies, such as skilled labor shortages and increasing global competition,
    alongside the imperative for sustainable production. This journal provides a novel
    approach for designing and documenting prescriptive analytics use cases in manufacturing
    environments. The framework addresses the need for effective integration of advanced
    data analytics and prescriptive analytics solutions within existing production
    environments, thereby enhancing operational efficiency and decision-making processes.
    A Design Science Research approach is used to iteratively derive a framework based
    on stakeholder needs and activities along the prescriptive analytics use case
    development cycle. The resulting framework is demonstrated and evaluated in an
    IoT Factory setup in a research facility. From a practical perspective, the framework
    supports manufacturing companies in systematically designing prescriptive analytics
    use cases. From a research perspective, it contributes to the body of knowledge
    on Enterprise Architecture Management (EAM) by operationalizing the design of
    prescriptive analytics use cases in manufacturing contexts. The main contributions
    of this study include the development of a framework that supports the planning,
    design, and integration of prescriptive analytics use cases. This framework fosters
    interdisciplinary collaboration and aids in managing the complexity of data-driven
    projects.</jats:p>
article_number: '4271'
author:
- first_name: Julian
  full_name: Weller, Julian
  last_name: Weller
- first_name: Roman
  full_name: Dumitrescu, Roman
  id: '16190'
  last_name: Dumitrescu
citation:
  ama: 'Weller J, Dumitrescu R. Decision-Driven Analytics in Smart Factories: Enterprise
    Architecture Framework for Use Case Specification and Engineering (FUSE). <i>Electronics</i>.
    2025;14(21). doi:<a href="https://doi.org/10.3390/electronics14214271">10.3390/electronics14214271</a>'
  apa: 'Weller, J., &#38; Dumitrescu, R. (2025). Decision-Driven Analytics in Smart
    Factories: Enterprise Architecture Framework for Use Case Specification and Engineering
    (FUSE). <i>Electronics</i>, <i>14</i>(21), Article 4271. <a href="https://doi.org/10.3390/electronics14214271">https://doi.org/10.3390/electronics14214271</a>'
  bibtex: '@article{Weller_Dumitrescu_2025, title={Decision-Driven Analytics in Smart
    Factories: Enterprise Architecture Framework for Use Case Specification and Engineering
    (FUSE)}, volume={14}, DOI={<a href="https://doi.org/10.3390/electronics14214271">10.3390/electronics14214271</a>},
    number={214271}, journal={Electronics}, publisher={MDPI AG}, author={Weller, Julian
    and Dumitrescu, Roman}, year={2025} }'
  chicago: 'Weller, Julian, and Roman Dumitrescu. “Decision-Driven Analytics in Smart
    Factories: Enterprise Architecture Framework for Use Case Specification and Engineering
    (FUSE).” <i>Electronics</i> 14, no. 21 (2025). <a href="https://doi.org/10.3390/electronics14214271">https://doi.org/10.3390/electronics14214271</a>.'
  ieee: 'J. Weller and R. Dumitrescu, “Decision-Driven Analytics in Smart Factories:
    Enterprise Architecture Framework for Use Case Specification and Engineering (FUSE),”
    <i>Electronics</i>, vol. 14, no. 21, Art. no. 4271, 2025, doi: <a href="https://doi.org/10.3390/electronics14214271">10.3390/electronics14214271</a>.'
  mla: 'Weller, Julian, and Roman Dumitrescu. “Decision-Driven Analytics in Smart
    Factories: Enterprise Architecture Framework for Use Case Specification and Engineering
    (FUSE).” <i>Electronics</i>, vol. 14, no. 21, 4271, MDPI AG, 2025, doi:<a href="https://doi.org/10.3390/electronics14214271">10.3390/electronics14214271</a>.'
  short: J. Weller, R. Dumitrescu, Electronics 14 (2025).
date_created: 2026-02-19T10:08:21Z
date_updated: 2026-02-19T10:08:54Z
department:
- _id: '563'
doi: 10.3390/electronics14214271
intvolume: '        14'
issue: '21'
language:
- iso: eng
publication: Electronics
publication_identifier:
  issn:
  - 2079-9292
publication_status: published
publisher: MDPI AG
status: public
title: 'Decision-Driven Analytics in Smart Factories: Enterprise Architecture Framework
  for Use Case Specification and Engineering (FUSE)'
type: journal_article
user_id: '15782'
volume: 14
year: '2025'
...
---
_id: '64252'
abstract:
- lang: eng
  text: <jats:title>ABSTRACT:</jats:title><jats:p>The increasing complexity of modern
    product and production system development, driven by dynamic market demands, supply
    chain disruptions and economic pressures, poses significant challenges for companies.
    Existing methodologies often fall short due to their domain-specific focus, inconsistent
    terminology and lack of integration. To address these challenges, this paper presents
    a taxonomy for integrative product and production system development. The taxonomy
    systematically structures key elements, dependencies and processes to improve
    collaboration, decision-making and communication within organisations. Developed
    iteratively the taxonomy identifies ten core artefacts. It enables organisations
    to better plan improvements, synchronise development processes, and select appropriate
    methods and tools.</jats:p>
author:
- first_name: Jan-Philipp
  full_name: Disselkamp, Jan-Philipp
  last_name: Disselkamp
- first_name: Tobias
  full_name: Seidenberg, Tobias
  last_name: Seidenberg
- first_name: Svenja
  full_name: Westphal, Svenja
  last_name: Westphal
- first_name: Jonas
  full_name: Lick, Jonas
  last_name: Lick
- first_name: Lukas
  full_name: Ptock, Lukas
  last_name: Ptock
- first_name: Fabian
  full_name: Wyrwich, Fabian
  last_name: Wyrwich
- first_name: Aschot
  full_name: Hovemann, Aschot
  last_name: Hovemann
- first_name: Roman
  full_name: Dumitrescu, Roman
  id: '16190'
  last_name: Dumitrescu
citation:
  ama: 'Disselkamp J-P, Seidenberg T, Westphal S, et al. Integrative and Integrated
    product and production system development: a taxonomy for managing dependencies
    and processes. In: <i>Proceedings of the Design Society</i>. Vol 5. Cambridge
    University Press (CUP); 2025:2121-2130. doi:<a href="https://doi.org/10.1017/pds.2025.10226">10.1017/pds.2025.10226</a>'
  apa: 'Disselkamp, J.-P., Seidenberg, T., Westphal, S., Lick, J., Ptock, L., Wyrwich,
    F., Hovemann, A., &#38; Dumitrescu, R. (2025). Integrative and Integrated product
    and production system development: a taxonomy for managing dependencies and processes.
    <i>Proceedings of the Design Society</i>, <i>5</i>, 2121–2130. <a href="https://doi.org/10.1017/pds.2025.10226">https://doi.org/10.1017/pds.2025.10226</a>'
  bibtex: '@inproceedings{Disselkamp_Seidenberg_Westphal_Lick_Ptock_Wyrwich_Hovemann_Dumitrescu_2025,
    title={Integrative and Integrated product and production system development: a
    taxonomy for managing dependencies and processes}, volume={5}, DOI={<a href="https://doi.org/10.1017/pds.2025.10226">10.1017/pds.2025.10226</a>},
    booktitle={Proceedings of the Design Society}, publisher={Cambridge University
    Press (CUP)}, author={Disselkamp, Jan-Philipp and Seidenberg, Tobias and Westphal,
    Svenja and Lick, Jonas and Ptock, Lukas and Wyrwich, Fabian and Hovemann, Aschot
    and Dumitrescu, Roman}, year={2025}, pages={2121–2130} }'
  chicago: 'Disselkamp, Jan-Philipp, Tobias Seidenberg, Svenja Westphal, Jonas Lick,
    Lukas Ptock, Fabian Wyrwich, Aschot Hovemann, and Roman Dumitrescu. “Integrative
    and Integrated Product and Production System Development: A Taxonomy for Managing
    Dependencies and Processes.” In <i>Proceedings of the Design Society</i>, 5:2121–30.
    Cambridge University Press (CUP), 2025. <a href="https://doi.org/10.1017/pds.2025.10226">https://doi.org/10.1017/pds.2025.10226</a>.'
  ieee: 'J.-P. Disselkamp <i>et al.</i>, “Integrative and Integrated product and production
    system development: a taxonomy for managing dependencies and processes,” in <i>Proceedings
    of the Design Society</i>, 2025, vol. 5, pp. 2121–2130, doi: <a href="https://doi.org/10.1017/pds.2025.10226">10.1017/pds.2025.10226</a>.'
  mla: 'Disselkamp, Jan-Philipp, et al. “Integrative and Integrated Product and Production
    System Development: A Taxonomy for Managing Dependencies and Processes.” <i>Proceedings
    of the Design Society</i>, vol. 5, Cambridge University Press (CUP), 2025, pp.
    2121–30, doi:<a href="https://doi.org/10.1017/pds.2025.10226">10.1017/pds.2025.10226</a>.'
  short: 'J.-P. Disselkamp, T. Seidenberg, S. Westphal, J. Lick, L. Ptock, F. Wyrwich,
    A. Hovemann, R. Dumitrescu, in: Proceedings of the Design Society, Cambridge University
    Press (CUP), 2025, pp. 2121–2130.'
date_created: 2026-02-19T10:03:40Z
date_updated: 2026-02-19T10:04:32Z
department:
- _id: '563'
doi: 10.1017/pds.2025.10226
intvolume: '         5'
language:
- iso: eng
page: 2121-2130
publication: Proceedings of the Design Society
publication_identifier:
  issn:
  - 2732-527X
publication_status: published
publisher: Cambridge University Press (CUP)
status: public
title: 'Integrative and Integrated product and production system development: a taxonomy
  for managing dependencies and processes'
type: conference
user_id: '15782'
volume: 5
year: '2025'
...
---
_id: '59517'
author:
- first_name: Jonas
  full_name: Lick, Jonas
  last_name: Lick
- first_name: Fiona
  full_name: Kattenstroth, Fiona
  last_name: Kattenstroth
- first_name: Malte
  full_name: Trienens, Malte
  last_name: Trienens
- first_name: Jan-Philipp
  full_name: Disselkamp, Jan-Philipp
  last_name: Disselkamp
- first_name: Arno
  full_name: Kühn, Arno
  last_name: Kühn
- first_name: Roman
  full_name: Dumitrescu, Roman
  id: '16190'
  last_name: Dumitrescu
citation:
  ama: 'Lick J, Kattenstroth F, Trienens M, Disselkamp J-P, Kühn A, Dumitrescu R.
    Guidance on a Digital Factory Twin: Proposal for a Reference Architecture. In:
    <i>2024 IEEE International Conference on Technology Management, Operations and
    Decisions (ICTMOD)</i>. IEEE; 2025. doi:<a href="https://doi.org/10.1109/ictmod63116.2024.10878221">10.1109/ictmod63116.2024.10878221</a>'
  apa: 'Lick, J., Kattenstroth, F., Trienens, M., Disselkamp, J.-P., Kühn, A., &#38;
    Dumitrescu, R. (2025). Guidance on a Digital Factory Twin: Proposal for a Reference
    Architecture. <i>2024 IEEE International Conference on Technology Management,
    Operations and Decisions (ICTMOD)</i>. <a href="https://doi.org/10.1109/ictmod63116.2024.10878221">https://doi.org/10.1109/ictmod63116.2024.10878221</a>'
  bibtex: '@inproceedings{Lick_Kattenstroth_Trienens_Disselkamp_Kühn_Dumitrescu_2025,
    title={Guidance on a Digital Factory Twin: Proposal for a Reference Architecture},
    DOI={<a href="https://doi.org/10.1109/ictmod63116.2024.10878221">10.1109/ictmod63116.2024.10878221</a>},
    booktitle={2024 IEEE International Conference on Technology Management, Operations
    and Decisions (ICTMOD)}, publisher={IEEE}, author={Lick, Jonas and Kattenstroth,
    Fiona and Trienens, Malte and Disselkamp, Jan-Philipp and Kühn, Arno and Dumitrescu,
    Roman}, year={2025} }'
  chicago: 'Lick, Jonas, Fiona Kattenstroth, Malte Trienens, Jan-Philipp Disselkamp,
    Arno Kühn, and Roman Dumitrescu. “Guidance on a Digital Factory Twin: Proposal
    for a Reference Architecture.” In <i>2024 IEEE International Conference on Technology
    Management, Operations and Decisions (ICTMOD)</i>. IEEE, 2025. <a href="https://doi.org/10.1109/ictmod63116.2024.10878221">https://doi.org/10.1109/ictmod63116.2024.10878221</a>.'
  ieee: 'J. Lick, F. Kattenstroth, M. Trienens, J.-P. Disselkamp, A. Kühn, and R.
    Dumitrescu, “Guidance on a Digital Factory Twin: Proposal for a Reference Architecture,”
    2025, doi: <a href="https://doi.org/10.1109/ictmod63116.2024.10878221">10.1109/ictmod63116.2024.10878221</a>.'
  mla: 'Lick, Jonas, et al. “Guidance on a Digital Factory Twin: Proposal for a Reference
    Architecture.” <i>2024 IEEE International Conference on Technology Management,
    Operations and Decisions (ICTMOD)</i>, IEEE, 2025, doi:<a href="https://doi.org/10.1109/ictmod63116.2024.10878221">10.1109/ictmod63116.2024.10878221</a>.'
  short: 'J. Lick, F. Kattenstroth, M. Trienens, J.-P. Disselkamp, A. Kühn, R. Dumitrescu,
    in: 2024 IEEE International Conference on Technology Management, Operations and
    Decisions (ICTMOD), IEEE, 2025.'
date_created: 2025-04-11T13:01:18Z
date_updated: 2026-02-19T10:18:11Z
department:
- _id: '563'
doi: 10.1109/ictmod63116.2024.10878221
language:
- iso: eng
publication: 2024 IEEE International Conference on Technology Management, Operations
  and Decisions (ICTMOD)
publication_status: published
publisher: IEEE
status: public
title: 'Guidance on a Digital Factory Twin: Proposal for a Reference Architecture'
type: conference
user_id: '15782'
year: '2025'
...
---
_id: '61121'
author:
- first_name: Volker
  full_name: Peckhaus, Volker
  id: '391'
  last_name: Peckhaus
citation:
  ama: Peckhaus V. Franke-Reddig, Julia, „Bernard Bolzano im Kontext der Logikgeschichtsschreibung
    von Heinrich Scholz“, SieB. Siegener Beiträge zur Geschichte und Philosophie der
    Mathematik 18 (2024), 155–175. <i>zbMATH Open, Zbl 08058231</i>. Published online
    2025.
  apa: Peckhaus, V. (2025). Franke-Reddig, Julia, „Bernard Bolzano im Kontext der
    Logikgeschichtsschreibung von Heinrich Scholz“, SieB. Siegener Beiträge zur Geschichte
    und Philosophie der Mathematik 18 (2024), 155–175. In <i>zbMATH Open, Zbl. 08058231</i>.
  bibtex: '@article{Peckhaus_2025, title={Franke-Reddig, Julia, „Bernard Bolzano im
    Kontext der Logikgeschichtsschreibung von Heinrich Scholz“, SieB. Siegener Beiträge
    zur Geschichte und Philosophie der Mathematik 18 (2024), 155–175}, journal={zbMATH
    Open, Zbl. 08058231}, author={Peckhaus, Volker}, year={2025} }'
  chicago: Peckhaus, Volker. “Franke-Reddig, Julia, „Bernard Bolzano Im Kontext Der
    Logikgeschichtsschreibung von Heinrich Scholz“, SieB. Siegener Beiträge Zur Geschichte
    Und Philosophie Der Mathematik 18 (2024), 155–175.” <i>ZbMATH Open, Zbl. 08058231</i>,
    2025.
  ieee: V. Peckhaus, “Franke-Reddig, Julia, „Bernard Bolzano im Kontext der Logikgeschichtsschreibung
    von Heinrich Scholz“, SieB. Siegener Beiträge zur Geschichte und Philosophie der
    Mathematik 18 (2024), 155–175,” <i>zbMATH Open, Zbl. 08058231</i>. 2025.
  mla: Peckhaus, Volker. “Franke-Reddig, Julia, „Bernard Bolzano Im Kontext Der Logikgeschichtsschreibung
    von Heinrich Scholz“, SieB. Siegener Beiträge Zur Geschichte Und Philosophie Der
    Mathematik 18 (2024), 155–175.” <i>ZbMATH Open, Zbl. 08058231</i>, 2025.
  short: V. Peckhaus, ZbMATH Open, Zbl. 08058231 (2025).
date_created: 2025-09-03T13:56:07Z
date_updated: 2026-02-19T10:10:27Z
department:
- _id: '520'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://zbmath.org/8058231
oa: '1'
publication: zbMATH Open, Zbl. 08058231
status: public
title: Franke-Reddig, Julia, „Bernard Bolzano im Kontext der Logikgeschichtsschreibung
  von Heinrich Scholz“, SieB. Siegener Beiträge zur Geschichte und Philosophie der
  Mathematik 18 (2024), 155–175
type: review
user_id: '14972'
year: '2025'
...
---
_id: '64254'
author:
- first_name: Roman
  full_name: Dumitrescu, Roman
  id: '16190'
  last_name: Dumitrescu
- first_name: Oliver
  full_name: Riedel, Oliver
  last_name: Riedel
- first_name: Michael
  full_name: Henke, Michael
  last_name: Henke
- first_name: Joachim
  full_name: Metternich, Joachim
  last_name: Metternich
- first_name: Steffen
  full_name: Ihlenfeldt, Steffen
  last_name: Ihlenfeldt
- first_name: Christian
  full_name: Koldewey, Christian
  id: '43136'
  last_name: Koldewey
  orcid: https://orcid.org/0000-0001-7992-6399
citation:
  ama: 'Dumitrescu R, Riedel O, Henke M, Metternich J, Ihlenfeldt S, Koldewey C. Gaia-X
    in industriellen Wertschöpfungsnetzwerken – Erkenntnisse aus der Förderlinie InGAIA-X.
    In: <i>Gaia-X in Industriellen Wertschöpfungsnetzwerken – Erkenntnisse Aus Der
    Förderlinie InGAIA-X</i>. VDI Verlag; 2025. doi:<a href="https://doi.org/10.51202/9783186204165-i">10.51202/9783186204165-i</a>'
  apa: Dumitrescu, R., Riedel, O., Henke, M., Metternich, J., Ihlenfeldt, S., &#38;
    Koldewey, C. (2025). Gaia-X in industriellen Wertschöpfungsnetzwerken – Erkenntnisse
    aus der Förderlinie InGAIA-X. In <i>Gaia-X in industriellen Wertschöpfungsnetzwerken
    – Erkenntnisse aus der Förderlinie InGAIA-X</i>. VDI Verlag. <a href="https://doi.org/10.51202/9783186204165-i">https://doi.org/10.51202/9783186204165-i</a>
  bibtex: '@inbook{Dumitrescu_Riedel_Henke_Metternich_Ihlenfeldt_Koldewey_2025, title={Gaia-X
    in industriellen Wertschöpfungsnetzwerken – Erkenntnisse aus der Förderlinie InGAIA-X},
    DOI={<a href="https://doi.org/10.51202/9783186204165-i">10.51202/9783186204165-i</a>},
    booktitle={Gaia-X in industriellen Wertschöpfungsnetzwerken – Erkenntnisse aus
    der Förderlinie InGAIA-X}, publisher={VDI Verlag}, author={Dumitrescu, Roman and
    Riedel, Oliver and Henke, Michael and Metternich, Joachim and Ihlenfeldt, Steffen
    and Koldewey, Christian}, year={2025} }'
  chicago: Dumitrescu, Roman, Oliver Riedel, Michael Henke, Joachim Metternich, Steffen
    Ihlenfeldt, and Christian Koldewey. “Gaia-X in Industriellen Wertschöpfungsnetzwerken
    – Erkenntnisse Aus Der Förderlinie InGAIA-X.” In <i>Gaia-X in Industriellen Wertschöpfungsnetzwerken
    – Erkenntnisse Aus Der Förderlinie InGAIA-X</i>. VDI Verlag, 2025. <a href="https://doi.org/10.51202/9783186204165-i">https://doi.org/10.51202/9783186204165-i</a>.
  ieee: R. Dumitrescu, O. Riedel, M. Henke, J. Metternich, S. Ihlenfeldt, and C. Koldewey,
    “Gaia-X in industriellen Wertschöpfungsnetzwerken – Erkenntnisse aus der Förderlinie
    InGAIA-X,” in <i>Gaia-X in industriellen Wertschöpfungsnetzwerken – Erkenntnisse
    aus der Förderlinie InGAIA-X</i>, VDI Verlag, 2025.
  mla: Dumitrescu, Roman, et al. “Gaia-X in Industriellen Wertschöpfungsnetzwerken
    – Erkenntnisse Aus Der Förderlinie InGAIA-X.” <i>Gaia-X in Industriellen Wertschöpfungsnetzwerken
    – Erkenntnisse Aus Der Förderlinie InGAIA-X</i>, VDI Verlag, 2025, doi:<a href="https://doi.org/10.51202/9783186204165-i">10.51202/9783186204165-i</a>.
  short: 'R. Dumitrescu, O. Riedel, M. Henke, J. Metternich, S. Ihlenfeldt, C. Koldewey,
    in: Gaia-X in Industriellen Wertschöpfungsnetzwerken – Erkenntnisse Aus Der Förderlinie
    InGAIA-X, VDI Verlag, 2025.'
date_created: 2026-02-19T10:16:30Z
date_updated: 2026-02-19T10:38:04Z
department:
- _id: '563'
doi: 10.51202/9783186204165-i
language:
- iso: eng
publication: Gaia-X in industriellen Wertschöpfungsnetzwerken – Erkenntnisse aus der
  Förderlinie InGAIA-X
publication_identifier:
  isbn:
  - '9783186204165'
publication_status: published
publisher: VDI Verlag
status: public
title: Gaia-X in industriellen Wertschöpfungsnetzwerken – Erkenntnisse aus der Förderlinie
  InGAIA-X
type: book_chapter
user_id: '15782'
year: '2025'
...
---
_id: '64256'
author:
- first_name: Anja
  full_name: Rasor, Anja
  id: '34415'
  last_name: Rasor
- first_name: Christian
  full_name: Koldewey, Christian
  id: '43136'
  last_name: Koldewey
  orcid: https://orcid.org/0000-0001-7992-6399
- first_name: Roman
  full_name: Dumitrescu, Roman
  id: '16190'
  last_name: Dumitrescu
citation:
  ama: Rasor A, Koldewey C, Dumitrescu R. Mit digitalen Hebeln zur Kreislaufwirtschaft.
    <i>Nachhaltige Industrie</i>. 2025;6(2):40-43. doi:<a href="https://doi.org/10.1007/s43462-025-1406-x">10.1007/s43462-025-1406-x</a>
  apa: Rasor, A., Koldewey, C., &#38; Dumitrescu, R. (2025). Mit digitalen Hebeln
    zur Kreislaufwirtschaft. <i>Nachhaltige Industrie</i>, <i>6</i>(2), 40–43. <a
    href="https://doi.org/10.1007/s43462-025-1406-x">https://doi.org/10.1007/s43462-025-1406-x</a>
  bibtex: '@article{Rasor_Koldewey_Dumitrescu_2025, title={Mit digitalen Hebeln zur
    Kreislaufwirtschaft}, volume={6}, DOI={<a href="https://doi.org/10.1007/s43462-025-1406-x">10.1007/s43462-025-1406-x</a>},
    number={2}, journal={Nachhaltige Industrie}, publisher={Springer Science and Business
    Media LLC}, author={Rasor, Anja and Koldewey, Christian and Dumitrescu, Roman},
    year={2025}, pages={40–43} }'
  chicago: 'Rasor, Anja, Christian Koldewey, and Roman Dumitrescu. “Mit digitalen
    Hebeln zur Kreislaufwirtschaft.” <i>Nachhaltige Industrie</i> 6, no. 2 (2025):
    40–43. <a href="https://doi.org/10.1007/s43462-025-1406-x">https://doi.org/10.1007/s43462-025-1406-x</a>.'
  ieee: 'A. Rasor, C. Koldewey, and R. Dumitrescu, “Mit digitalen Hebeln zur Kreislaufwirtschaft,”
    <i>Nachhaltige Industrie</i>, vol. 6, no. 2, pp. 40–43, 2025, doi: <a href="https://doi.org/10.1007/s43462-025-1406-x">10.1007/s43462-025-1406-x</a>.'
  mla: Rasor, Anja, et al. “Mit digitalen Hebeln zur Kreislaufwirtschaft.” <i>Nachhaltige
    Industrie</i>, vol. 6, no. 2, Springer Science and Business Media LLC, 2025, pp.
    40–43, doi:<a href="https://doi.org/10.1007/s43462-025-1406-x">10.1007/s43462-025-1406-x</a>.
  short: A. Rasor, C. Koldewey, R. Dumitrescu, Nachhaltige Industrie 6 (2025) 40–43.
date_created: 2026-02-19T10:23:05Z
date_updated: 2026-02-19T10:25:05Z
department:
- _id: '563'
doi: 10.1007/s43462-025-1406-x
intvolume: '         6'
issue: '2'
language:
- iso: ger
page: 40-43
publication: Nachhaltige Industrie
publication_identifier:
  issn:
  - 2662-7493
  - 2662-7507
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Mit digitalen Hebeln zur Kreislaufwirtschaft
type: journal_article
user_id: '15782'
volume: 6
year: '2025'
...
---
_id: '64257'
citation:
  ama: Dumitrescu R, Hölzle K, eds. <i>Vorausschau Und Technologieplanung - 19. Symposium
    Für Vorausschau Und Technologieplanung</i>. Verlagsschriftenreihe des Heinz Nixdorf
    Instituts; 2025. doi:<a href="https://doi.org/10.17619/UNIPB/1-2467">10.17619/UNIPB/1-2467</a>
  apa: Dumitrescu, R., &#38; Hölzle, K. (Eds.). (2025). <i>Vorausschau und Technologieplanung
    - 19. Symposium für Vorausschau und Technologieplanung</i>. Verlagsschriftenreihe
    des Heinz Nixdorf Instituts. <a href="https://doi.org/10.17619/UNIPB/1-2467">https://doi.org/10.17619/UNIPB/1-2467</a>
  bibtex: '@book{Dumitrescu_Hölzle_2025, place={Paderborn}, title={Vorausschau und
    Technologieplanung - 19. Symposium für Vorausschau und Technologieplanung}, DOI={<a
    href="https://doi.org/10.17619/UNIPB/1-2467">10.17619/UNIPB/1-2467</a>}, publisher={Verlagsschriftenreihe
    des Heinz Nixdorf Instituts}, year={2025} }'
  chicago: 'Dumitrescu, Roman, and Katharina Hölzle, eds. <i>Vorausschau Und Technologieplanung
    - 19. Symposium Für Vorausschau Und Technologieplanung</i>. Paderborn: Verlagsschriftenreihe
    des Heinz Nixdorf Instituts, 2025. <a href="https://doi.org/10.17619/UNIPB/1-2467">https://doi.org/10.17619/UNIPB/1-2467</a>.'
  ieee: 'R. Dumitrescu and K. Hölzle, Eds., <i>Vorausschau und Technologieplanung
    - 19. Symposium für Vorausschau und Technologieplanung</i>. Paderborn: Verlagsschriftenreihe
    des Heinz Nixdorf Instituts, 2025.'
  mla: Dumitrescu, Roman, and Katharina Hölzle, editors. <i>Vorausschau Und Technologieplanung
    - 19. Symposium Für Vorausschau Und Technologieplanung</i>. Verlagsschriftenreihe
    des Heinz Nixdorf Instituts, 2025, doi:<a href="https://doi.org/10.17619/UNIPB/1-2467">10.17619/UNIPB/1-2467</a>.
  short: R. Dumitrescu, K. Hölzle, eds., Vorausschau Und Technologieplanung - 19.
    Symposium Für Vorausschau Und Technologieplanung, Verlagsschriftenreihe des Heinz
    Nixdorf Instituts, Paderborn, 2025.
date_created: 2026-02-19T10:36:46Z
date_updated: 2026-02-19T10:37:27Z
department:
- _id: '563'
doi: 10.17619/UNIPB/1-2467
editor:
- first_name: Roman
  full_name: Dumitrescu, Roman
  id: '16190'
  last_name: Dumitrescu
- first_name: Katharina
  full_name: Hölzle, Katharina
  last_name: Hölzle
language:
- iso: eng
place: Paderborn
publisher: Verlagsschriftenreihe des Heinz Nixdorf Instituts
status: public
title: Vorausschau und Technologieplanung - 19. Symposium für Vorausschau und Technologieplanung
type: conference_editor
user_id: '15782'
year: '2025'
...
---
_id: '61932'
abstract:
- lang: eng
  text: <jats:p>Substantial improvements in the performance of optical interconnects
    based on multi-mode fibers are required to support emerging single-channel data
    transmission rates of 200 Gb/s and 400 Gb/s. Future optical components must combine
    very high modulation bandwidths—supporting signaling at 100 Gbaud and 200 Gbaud—with
    reduced spectral width to mitigate chromatic-dispersion-induced pulse broadening
    and increased brightness to further restrict flux-confining area in multi-mode
    fibers and thereby increase the effective modal bandwidth (EMB). A particularly
    promising route to improved performance within standard oxide-confined VCSEL technology
    is the introduction of multiple isolated or optically coupled oxide-confined apertures,
    which we refer to collectively as multi-aperture (MA) VCSEL arrays. We show that
    properly designed MA VCSELs exhibit narrow emission spectra, narrow far-field
    profiles and extended intrinsic modulation bandwidths, enabling longer-reach data
    transmission over both multi-mode (MMF) and single-mode fibers (SMF). One approach
    uses optically isolated apertures with lateral dimensions of approximately 2–3
    µm arranged with a pitch of 10–12 µm or less. Such devices demonstrate relaxation
    oscillation frequencies of around 30 GHz in continuous-wave operation and intrinsic
    modulation bandwidths approaching 50 GHz. Compared with a conventional single-aperture
    VCSELs of equivalent oxide-confined area, MA designs can reduce the spectral width
    (root mean square values &lt; 0.15 nm), lower series resistance (≈50 Ω) and limit
    junction overheating through more efficient multi-spot heat dissipation at the
    same total current. As each aperture lases in a single transverse mode, these
    devices exhibit narrow far-field patterns. In combination with well-defined spacing
    between emitting spots, they permit tailored restricted launch conditions in MMFs,
    enhancing effective modal bandwidth. In another MA approach, the apertures are
    optically coupled such that self-injection locking (SIL) leads to lasing in a
    single supermode. One may regard one of the supermodes as acting as a master mode
    controlling the other one. Streak-camera studies reveal post-pulse oscillations
    in the SIL regime at frequencies up to 100 GHz. MA VCSELs enable a favorable combination
    of wavelength chirp and chromatic dispersion, extending transmission distances
    over MMFs beyond those expected for zero-chirp sources and supporting transfer
    bandwidths up to 60 GHz over kilometer-length SMF links.</jats:p>
article_number: '1037'
author:
- first_name: Nikolay N.
  full_name: Ledentsov, Nikolay N.
  last_name: Ledentsov
- first_name: Nikolay
  full_name: Ledentsov, Nikolay
  last_name: Ledentsov
- first_name: Vitaly A.
  full_name: Shchukin, Vitaly A.
  last_name: Shchukin
- first_name: Alexander N.
  full_name: Ledentsov, Alexander N.
  last_name: Ledentsov
- first_name: Oleg Yu.
  full_name: Makarov, Oleg Yu.
  last_name: Makarov
- first_name: Ilya E.
  full_name: Titkov, Ilya E.
  last_name: Titkov
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Thomas
  full_name: de Adelsburg Ettmayer, Thomas
  last_name: de Adelsburg Ettmayer
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
- first_name: Xin
  full_name: Chen, Xin
  last_name: Chen
- first_name: Jason E.
  full_name: Hurley, Jason E.
  last_name: Hurley
- first_name: Hao
  full_name: Dong, Hao
  last_name: Dong
- first_name: Ming-Jun
  full_name: Li, Ming-Jun
  last_name: Li
citation:
  ama: 'Ledentsov NN, Ledentsov N, Shchukin VA, et al. VCSELs: Influence of Design
    on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers. <i>Photonics</i>.
    2025;12(10). doi:<a href="https://doi.org/10.3390/photonics12101037">10.3390/photonics12101037</a>'
  apa: 'Ledentsov, N. N., Ledentsov, N., Shchukin, V. A., Ledentsov, A. N., Makarov,
    O. Yu., Titkov, I. E., Lindemann, M., de Adelsburg Ettmayer, T., Gerhardt, N.
    C., Hofmann, M. R., Chen, X., Hurley, J. E., Dong, H., &#38; Li, M.-J. (2025).
    VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode
    and Single-Mode Fibers. <i>Photonics</i>, <i>12</i>(10), Article 1037. <a href="https://doi.org/10.3390/photonics12101037">https://doi.org/10.3390/photonics12101037</a>'
  bibtex: '@article{Ledentsov_Ledentsov_Shchukin_Ledentsov_Makarov_Titkov_Lindemann_de
    Adelsburg Ettmayer_Gerhardt_Hofmann_et al._2025, title={VCSELs: Influence of Design
    on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers},
    volume={12}, DOI={<a href="https://doi.org/10.3390/photonics12101037">10.3390/photonics12101037</a>},
    number={101037}, journal={Photonics}, publisher={MDPI AG}, author={Ledentsov,
    Nikolay N. and Ledentsov, Nikolay and Shchukin, Vitaly A. and Ledentsov, Alexander
    N. and Makarov, Oleg Yu. and Titkov, Ilya E. and Lindemann, Markus and de Adelsburg
    Ettmayer, Thomas and Gerhardt, Nils Christopher and Hofmann, Martin R. and et
    al.}, year={2025} }'
  chicago: 'Ledentsov, Nikolay N., Nikolay Ledentsov, Vitaly A. Shchukin, Alexander
    N. Ledentsov, Oleg Yu. Makarov, Ilya E. Titkov, Markus Lindemann, et al. “VCSELs:
    Influence of Design on Performance and Data Transmission over Multi-Mode and Single-Mode
    Fibers.” <i>Photonics</i> 12, no. 10 (2025). <a href="https://doi.org/10.3390/photonics12101037">https://doi.org/10.3390/photonics12101037</a>.'
  ieee: 'N. N. Ledentsov <i>et al.</i>, “VCSELs: Influence of Design on Performance
    and Data Transmission over Multi-Mode and Single-Mode Fibers,” <i>Photonics</i>,
    vol. 12, no. 10, Art. no. 1037, 2025, doi: <a href="https://doi.org/10.3390/photonics12101037">10.3390/photonics12101037</a>.'
  mla: 'Ledentsov, Nikolay N., et al. “VCSELs: Influence of Design on Performance
    and Data Transmission over Multi-Mode and Single-Mode Fibers.” <i>Photonics</i>,
    vol. 12, no. 10, 1037, MDPI AG, 2025, doi:<a href="https://doi.org/10.3390/photonics12101037">10.3390/photonics12101037</a>.'
  short: N.N. Ledentsov, N. Ledentsov, V.A. Shchukin, A.N. Ledentsov, O.Yu. Makarov,
    I.E. Titkov, M. Lindemann, T. de Adelsburg Ettmayer, N.C. Gerhardt, M.R. Hofmann,
    X. Chen, J.E. Hurley, H. Dong, M.-J. Li, Photonics 12 (2025).
date_created: 2025-10-23T10:59:59Z
date_updated: 2026-02-19T12:39:12Z
department:
- _id: '977'
doi: 10.3390/photonics12101037
intvolume: '        12'
issue: '10'
language:
- iso: eng
publication: Photonics
publication_identifier:
  issn:
  - 2304-6732
publication_status: published
publisher: MDPI AG
status: public
title: 'VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode
  and Single-Mode Fibers'
type: journal_article
user_id: '15911'
volume: 12
year: '2025'
...
---
_id: '61931'
abstract:
- lang: eng
  text: <jats:p>Recent research revealed that single-mode vertical-cavity surface-emitting
    lasers under spin injection (spin-VCSELs) have the potential to revolutionize
    laser technology for short-haul optical communications. While previous studies
    have focused solely on single-mode operation, this study introduces multimode
    spin-VCSELs. We experimentally demonstrate the existence of multi-resonant polarization
    dynamics when spin is injected, a phenomenon previously unobserved. The development
    opens the door to significantly faster and more efficient optical communication
    systems by harnessing the collective behavior of multiple laser modes. Furthermore,
    we lay the groundwork for understanding multimode operation through the extension
    of the single-mode spin–flip model, which forms the basis for present and future
    analyses of multimode spin-laser operation. This work is an important step toward
    realizing the full potential of spin-VCSELs and, thus, enables significantly improved
    performance of spin-VCSEL-based optical networks in the future.</jats:p>
article_number: '106120'
author:
- first_name: Uliana
  full_name: Diiankova, Uliana
  last_name: Diiankova
- first_name: Mariusz
  full_name: Drong, Mariusz
  last_name: Drong
- first_name: Tobias
  full_name: Pusch, Tobias
  last_name: Pusch
- first_name: Rainer
  full_name: Michalzik, Rainer
  last_name: Michalzik
- first_name: Markus
  full_name: Lindemann, Markus
  last_name: Lindemann
- first_name: Nils Christopher
  full_name: Gerhardt, Nils Christopher
  id: '115298'
  last_name: Gerhardt
  orcid: 0009-0002-5538-231X
- first_name: Martin R.
  full_name: Hofmann, Martin R.
  last_name: Hofmann
citation:
  ama: Diiankova U, Drong M, Pusch T, et al. Multimode vertical-cavity surface-emitting
    lasers under spin injection. <i>APL Photonics</i>. 2025;10(10). doi:<a href="https://doi.org/10.1063/5.0286998">10.1063/5.0286998</a>
  apa: Diiankova, U., Drong, M., Pusch, T., Michalzik, R., Lindemann, M., Gerhardt,
    N. C., &#38; Hofmann, M. R. (2025). Multimode vertical-cavity surface-emitting
    lasers under spin injection. <i>APL Photonics</i>, <i>10</i>(10), Article 106120.
    <a href="https://doi.org/10.1063/5.0286998">https://doi.org/10.1063/5.0286998</a>
  bibtex: '@article{Diiankova_Drong_Pusch_Michalzik_Lindemann_Gerhardt_Hofmann_2025,
    title={Multimode vertical-cavity surface-emitting lasers under spin injection},
    volume={10}, DOI={<a href="https://doi.org/10.1063/5.0286998">10.1063/5.0286998</a>},
    number={10106120}, journal={APL Photonics}, publisher={AIP Publishing}, author={Diiankova,
    Uliana and Drong, Mariusz and Pusch, Tobias and Michalzik, Rainer and Lindemann,
    Markus and Gerhardt, Nils Christopher and Hofmann, Martin R.}, year={2025} }'
  chicago: Diiankova, Uliana, Mariusz Drong, Tobias Pusch, Rainer Michalzik, Markus
    Lindemann, Nils Christopher Gerhardt, and Martin R. Hofmann. “Multimode Vertical-Cavity
    Surface-Emitting Lasers under Spin Injection.” <i>APL Photonics</i> 10, no. 10
    (2025). <a href="https://doi.org/10.1063/5.0286998">https://doi.org/10.1063/5.0286998</a>.
  ieee: 'U. Diiankova <i>et al.</i>, “Multimode vertical-cavity surface-emitting lasers
    under spin injection,” <i>APL Photonics</i>, vol. 10, no. 10, Art. no. 106120,
    2025, doi: <a href="https://doi.org/10.1063/5.0286998">10.1063/5.0286998</a>.'
  mla: Diiankova, Uliana, et al. “Multimode Vertical-Cavity Surface-Emitting Lasers
    under Spin Injection.” <i>APL Photonics</i>, vol. 10, no. 10, 106120, AIP Publishing,
    2025, doi:<a href="https://doi.org/10.1063/5.0286998">10.1063/5.0286998</a>.
  short: U. Diiankova, M. Drong, T. Pusch, R. Michalzik, M. Lindemann, N.C. Gerhardt,
    M.R. Hofmann, APL Photonics 10 (2025).
date_created: 2025-10-23T10:52:59Z
date_updated: 2026-02-19T12:39:00Z
department:
- _id: '977'
doi: 10.1063/5.0286998
intvolume: '        10'
issue: '10'
language:
- iso: eng
publication: APL Photonics
publication_identifier:
  issn:
  - 2378-0967
publication_status: published
publisher: AIP Publishing
status: public
title: Multimode vertical-cavity surface-emitting lasers under spin injection
type: journal_article
user_id: '15911'
volume: 10
year: '2025'
...
---
_id: '56717'
abstract:
- lang: eng
  text: "We establish a multiresolution analysis on the space $\\text{Herm}(n)$ of\r\n$n\\times
    n$ complex Hermitian matrices which is adapted to invariance under\r\nconjugation
    by the unitary group $U(n).$ The orbits under this action are\r\nparametrized
    by the possible ordered spectra of Hermitian matrices, which\r\nconstitute a closed
    Weyl chamber of type $A_{n-1}$ in $\\mathbb R^n.$ The space\r\n$L^2(\\text{Herm}(n))^{U(n)}$
    of radial, i.e. $U(n)$-invariant $L^2$-functions\r\non $\\text{Herm}(n)$ is naturally
    identified with a certain weighted $L^2$-space\r\non this chamber.\r\n  The scale
    spaces of our multiresolution analysis are obtained by usual dyadic\r\ndilations
    as well as generalized translations of a scaling function, where the\r\ngeneralized
    translation is a hypergroup translation which respects the radial\r\ngeometry.
    We provide a concise criterion to characterize orthonormal wavelet\r\nbases and
    show that such bases always exist. They provide natural orthonormal\r\nbases of
    the space $L^2(\\text{Herm}(n))^{U(n)}.$\r\n  Furthermore, we show how to obtain
    radial scaling functions from classical\r\nscaling functions on $\\mathbb R^{n}$.
    Finally, generalizations related to the\r\nCartan decompositions for general compact
    Lie groups are indicated."
article_type: original
author:
- first_name: Lukas
  full_name: Langen, Lukas
  id: '73664'
  last_name: Langen
- first_name: Margit
  full_name: Rösler, Margit
  id: '37390'
  last_name: Rösler
citation:
  ama: Langen L, Rösler M. Multiresolution analysis on spectra of hermitian matrices.
    <i>Indagationes Mathematicae</i>. 2025;36(6):1671-1694.
  apa: Langen, L., &#38; Rösler, M. (2025). Multiresolution analysis on spectra of
    hermitian matrices. <i>Indagationes Mathematicae</i>, <i>36</i>(6), 1671–1694.
  bibtex: '@article{Langen_Rösler_2025, title={Multiresolution analysis on spectra
    of hermitian matrices}, volume={36}, number={6}, journal={Indagationes Mathematicae},
    publisher={Elsevier}, author={Langen, Lukas and Rösler, Margit}, year={2025},
    pages={1671–1694} }'
  chicago: 'Langen, Lukas, and Margit Rösler. “Multiresolution Analysis on Spectra
    of Hermitian Matrices.” <i>Indagationes Mathematicae</i> 36, no. 6 (2025): 1671–94.'
  ieee: L. Langen and M. Rösler, “Multiresolution analysis on spectra of hermitian
    matrices,” <i>Indagationes Mathematicae</i>, vol. 36, no. 6, pp. 1671–1694, 2025.
  mla: Langen, Lukas, and Margit Rösler. “Multiresolution Analysis on Spectra of Hermitian
    Matrices.” <i>Indagationes Mathematicae</i>, vol. 36, no. 6, Elsevier, 2025, pp.
    1671–94.
  short: L. Langen, M. Rösler, Indagationes Mathematicae 36 (2025) 1671–1694.
date_created: 2024-10-22T09:31:19Z
date_updated: 2026-02-19T14:16:43Z
ddc:
- '510'
department:
- _id: '555'
external_id:
  arxiv:
  - '2410.10364'
file:
- access_level: closed
  content_type: application/pdf
  creator: llangen
  date_created: 2026-02-19T14:14:39Z
  date_updated: 2026-02-19T14:14:39Z
  file_id: '64288'
  file_name: MSA_hermitsch_published.pdf
  file_size: 443262
  relation: main_file
  success: 1
file_date_updated: 2026-02-19T14:14:39Z
has_accepted_license: '1'
intvolume: '        36'
issue: '6'
language:
- iso: eng
main_file_link:
- url: https://doi.org/10.1016/j.indag.2025.03.009
page: 1671-1694
project:
- _id: '357'
  name: TRR 358 - Ganzzahlige Strukturen in Geometrie und Darstellungstheorie
publication: Indagationes Mathematicae
publication_status: published
publisher: Elsevier
related_material:
  link:
  - relation: research_paper
    url: https://arxiv.org/abs/2410.10364
status: public
title: Multiresolution analysis on spectra of hermitian matrices
type: journal_article
user_id: '73664'
volume: 36
year: '2025'
...
---
_id: '64289'
abstract:
- lang: eng
  text: "<jats:title>Abstract</jats:title>\r\n          <jats:p>Motivated by asymptotic
    symmetry groups in general relativity, we consider projective unitary representations
    <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$\\overline{\\rho
    }$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n
    \                 <mml:mover>\r\n                    <mml:mi>ρ</mml:mi>\r\n                    <mml:mo>¯</mml:mo>\r\n
    \                 </mml:mover>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n
    \           </jats:inline-formula> of the Lie group <jats:inline-formula>\r\n
    \             <jats:alternatives>\r\n                <jats:tex-math>$${{\\,\\textrm{Diff}\\,}}_c(M)$$</jats:tex-math>\r\n
    \               <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n
    \                 <mml:mrow>\r\n                    <mml:msub>\r\n                      <mml:mrow>\r\n
    \                       <mml:mspace/>\r\n                        <mml:mtext>Diff</mml:mtext>\r\n
    \                       <mml:mspace/>\r\n                      </mml:mrow>\r\n
    \                     <mml:mi>c</mml:mi>\r\n                    </mml:msub>\r\n
    \                   <mml:mrow>\r\n                      <mml:mo>(</mml:mo>\r\n
    \                     <mml:mi>M</mml:mi>\r\n                      <mml:mo>)</mml:mo>\r\n
    \                   </mml:mrow>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n
    \             </jats:alternatives>\r\n            </jats:inline-formula> of compactly
    supported diffeomorphisms of a smooth manifold <jats:italic>M</jats:italic> that
    satisfy a so-called generalized positive energy condition. In particular, this
    captures representations that are in a suitable sense compatible with a KMS state
    on the von Neumann algebra generated by <jats:inline-formula>\r\n              <jats:alternatives>\r\n
    \               <jats:tex-math>$$\\overline{\\rho }$$</jats:tex-math>\r\n                <mml:math
    xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mover>\r\n
    \                   <mml:mi>ρ</mml:mi>\r\n                    <mml:mo>¯</mml:mo>\r\n
    \                 </mml:mover>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n
    \           </jats:inline-formula>. We show that if <jats:italic>M</jats:italic>
    is connected and <jats:inline-formula>\r\n              <jats:alternatives>\r\n
    \               <jats:tex-math>$$\\dim (M) &gt; 1$$</jats:tex-math>\r\n                <mml:math
    xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n
    \                   <mml:mo>dim</mml:mo>\r\n                    <mml:mo>(</mml:mo>\r\n
    \                   <mml:mi>M</mml:mi>\r\n                    <mml:mo>)</mml:mo>\r\n
    \                   <mml:mo>&gt;</mml:mo>\r\n                    <mml:mn>1</mml:mn>\r\n
    \                 </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n
    \           </jats:inline-formula>, then any such representation is necessarily
    trivial on the identity component <jats:inline-formula>\r\n              <jats:alternatives>\r\n
    \               <jats:tex-math>$${{\\,\\textrm{Diff}\\,}}_c(M)_0$$</jats:tex-math>\r\n
    \               <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n
    \                 <mml:mrow>\r\n                    <mml:msub>\r\n                      <mml:mrow>\r\n
    \                       <mml:mspace/>\r\n                        <mml:mtext>Diff</mml:mtext>\r\n
    \                       <mml:mspace/>\r\n                      </mml:mrow>\r\n
    \                     <mml:mi>c</mml:mi>\r\n                    </mml:msub>\r\n
    \                   <mml:msub>\r\n                      <mml:mrow>\r\n                        <mml:mo>(</mml:mo>\r\n
    \                       <mml:mi>M</mml:mi>\r\n                        <mml:mo>)</mml:mo>\r\n
    \                     </mml:mrow>\r\n                      <mml:mn>0</mml:mn>\r\n
    \                   </mml:msub>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n
    \             </jats:alternatives>\r\n            </jats:inline-formula>. As an
    intermediate step towards this result, we determine the continuous second Lie
    algebra cohomology <jats:inline-formula>\r\n              <jats:alternatives>\r\n
    \               <jats:tex-math>$$H^2_\\textrm{ct}(\\mathcal {X}_c(M), \\mathbb
    {R})$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n
    \                 <mml:mrow>\r\n                    <mml:msubsup>\r\n                      <mml:mi>H</mml:mi>\r\n
    \                     <mml:mtext>ct</mml:mtext>\r\n                      <mml:mn>2</mml:mn>\r\n
    \                   </mml:msubsup>\r\n                    <mml:mrow>\r\n                      <mml:mo>(</mml:mo>\r\n
    \                     <mml:msub>\r\n                        <mml:mi>X</mml:mi>\r\n
    \                       <mml:mi>c</mml:mi>\r\n                      </mml:msub>\r\n
    \                     <mml:mrow>\r\n                        <mml:mo>(</mml:mo>\r\n
    \                       <mml:mi>M</mml:mi>\r\n                        <mml:mo>)</mml:mo>\r\n
    \                     </mml:mrow>\r\n                      <mml:mo>,</mml:mo>\r\n
    \                     <mml:mi>R</mml:mi>\r\n                      <mml:mo>)</mml:mo>\r\n
    \                   </mml:mrow>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n
    \             </jats:alternatives>\r\n            </jats:inline-formula> of the
    Lie algebra of compactly supported vector fields. This is subtly different from
    Gelfand–Fuks cohomology in view of the compact support condition.</jats:p>"
article_number: '45'
author:
- first_name: Bas
  full_name: Janssens, Bas
  last_name: Janssens
- first_name: Milan
  full_name: Niestijl, Milan
  last_name: Niestijl
citation:
  ama: Janssens B, Niestijl M. Generalized Positive Energy Representations of the
    Group of Compactly Supported Diffeomorphisms. <i>Communications in Mathematical
    Physics</i>. 2025;406(2). doi:<a href="https://doi.org/10.1007/s00220-024-05226-w">10.1007/s00220-024-05226-w</a>
  apa: Janssens, B., &#38; Niestijl, M. (2025). Generalized Positive Energy Representations
    of the Group of Compactly Supported Diffeomorphisms. <i>Communications in Mathematical
    Physics</i>, <i>406</i>(2), Article 45. <a href="https://doi.org/10.1007/s00220-024-05226-w">https://doi.org/10.1007/s00220-024-05226-w</a>
  bibtex: '@article{Janssens_Niestijl_2025, title={Generalized Positive Energy Representations
    of the Group of Compactly Supported Diffeomorphisms}, volume={406}, DOI={<a href="https://doi.org/10.1007/s00220-024-05226-w">10.1007/s00220-024-05226-w</a>},
    number={245}, journal={Communications in Mathematical Physics}, publisher={Springer
    Science and Business Media LLC}, author={Janssens, Bas and Niestijl, Milan}, year={2025}
    }'
  chicago: Janssens, Bas, and Milan Niestijl. “Generalized Positive Energy Representations
    of the Group of Compactly Supported Diffeomorphisms.” <i>Communications in Mathematical
    Physics</i> 406, no. 2 (2025). <a href="https://doi.org/10.1007/s00220-024-05226-w">https://doi.org/10.1007/s00220-024-05226-w</a>.
  ieee: 'B. Janssens and M. Niestijl, “Generalized Positive Energy Representations
    of the Group of Compactly Supported Diffeomorphisms,” <i>Communications in Mathematical
    Physics</i>, vol. 406, no. 2, Art. no. 45, 2025, doi: <a href="https://doi.org/10.1007/s00220-024-05226-w">10.1007/s00220-024-05226-w</a>.'
  mla: Janssens, Bas, and Milan Niestijl. “Generalized Positive Energy Representations
    of the Group of Compactly Supported Diffeomorphisms.” <i>Communications in Mathematical
    Physics</i>, vol. 406, no. 2, 45, Springer Science and Business Media LLC, 2025,
    doi:<a href="https://doi.org/10.1007/s00220-024-05226-w">10.1007/s00220-024-05226-w</a>.
  short: B. Janssens, M. Niestijl, Communications in Mathematical Physics 406 (2025).
date_created: 2026-02-20T09:33:11Z
date_updated: 2026-02-20T09:41:41Z
department:
- _id: '93'
doi: 10.1007/s00220-024-05226-w
intvolume: '       406'
issue: '2'
language:
- iso: eng
publication: Communications in Mathematical Physics
publication_identifier:
  issn:
  - 0010-3616
  - 1432-0916
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Generalized Positive Energy Representations of the Group of Compactly Supported
  Diffeomorphisms
type: journal_article
user_id: '104095'
volume: 406
year: '2025'
...