---
_id: '65602'
abstract:
- lang: eng
text: This chapter explores the crucial role of simulation and modelling of electronic
and photonic components for terahertz (THz) systems. THz-related challenges already
begin with setting up the signal generation and sampling parameters and continue
with the realistic modelling of the electronic and photonic building blocks. Hereby,
photonic components require not only the modelling of the optical signal propagation
but also the modelling of the electronic interface in the THz regime. Furthermore,
when advancing to the simulation of systems like fully integrated electronic transmit
and receive frontends or photonically assisted analogue-to-digital converters
(ADCs), it is up to the designer to find a suitable level of abstraction. Size,
complexity, and available computational power versus accuracy must be taken into
consideration and prioritized against each other.
author:
- first_name: Dominik
full_name: Wrana, Dominik
last_name: Wrana
- first_name: Maxim
full_name: Weizel, Maxim
last_name: Weizel
- first_name: Simon
full_name: Haussmann, Simon
last_name: Haussmann
- first_name: Meysam
full_name: Bahmanian, Meysam
last_name: Bahmanian
- first_name: Ingmar
full_name: Kallfass, Ingmar
last_name: Kallfass
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
last_name: Scheytt
citation:
ama: 'Wrana D, Weizel M, Haussmann S, Bahmanian M, Kallfass I, Scheytt JC. Simulation
and Modelling of Electronic and Photonic Components. In: Metrology for THz
Communications. Springer Nature Switzerland; 2026. doi:10.1007/978-3-032-01986-8_36'
apa: Wrana, D., Weizel, M., Haussmann, S., Bahmanian, M., Kallfass, I., & Scheytt,
J. C. (2026). Simulation and Modelling of Electronic and Photonic Components.
In Metrology for THz Communications. Springer Nature Switzerland. https://doi.org/10.1007/978-3-032-01986-8_36
bibtex: '@inbook{Wrana_Weizel_Haussmann_Bahmanian_Kallfass_Scheytt_2026, place={Cham},
title={Simulation and Modelling of Electronic and Photonic Components}, DOI={10.1007/978-3-032-01986-8_36},
booktitle={Metrology for THz Communications}, publisher={Springer Nature Switzerland},
author={Wrana, Dominik and Weizel, Maxim and Haussmann, Simon and Bahmanian, Meysam
and Kallfass, Ingmar and Scheytt, J. Christoph}, year={2026} }'
chicago: 'Wrana, Dominik, Maxim Weizel, Simon Haussmann, Meysam Bahmanian, Ingmar
Kallfass, and J. Christoph Scheytt. “Simulation and Modelling of Electronic and
Photonic Components.” In Metrology for THz Communications. Cham: Springer
Nature Switzerland, 2026. https://doi.org/10.1007/978-3-032-01986-8_36.'
ieee: 'D. Wrana, M. Weizel, S. Haussmann, M. Bahmanian, I. Kallfass, and J. C. Scheytt,
“Simulation and Modelling of Electronic and Photonic Components,” in Metrology
for THz Communications, Cham: Springer Nature Switzerland, 2026.'
mla: Wrana, Dominik, et al. “Simulation and Modelling of Electronic and Photonic
Components.” Metrology for THz Communications, Springer Nature Switzerland,
2026, doi:10.1007/978-3-032-01986-8_36.
short: 'D. Wrana, M. Weizel, S. Haussmann, M. Bahmanian, I. Kallfass, J.C. Scheytt,
in: Metrology for THz Communications, Springer Nature Switzerland, Cham, 2026.'
date_created: 2026-05-11T07:58:34Z
date_updated: 2026-05-11T09:28:52Z
department:
- _id: '58'
doi: 10.1007/978-3-032-01986-8_36
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://link.springer.com/content/pdf/10.1007/978-3-032-01986-8.pdf
oa: '1'
place: Cham
project:
- _id: '298'
name: 'FOR 2863: Metrologie für die THz Kommunikation (Meteracom)'
- _id: '308'
name: 'FOR 2863: Metrologie für die THz Kommunikation, TP: Ultrabreitbandige Abtastung'
- _id: '313'
name: 'FOR 2863: Metrologie für die THz Kommunikation, TP C3: Skalierbares THz
Transceiver Impairment Modell'
publication: Metrology for THz Communications
publication_identifier:
isbn:
- '9783032019851'
- '9783032019868'
issn:
- 0342-4111
- 1556-1534
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: Simulation and Modelling of Electronic and Photonic Components
type: book_chapter
user_id: '44271'
year: '2026'
...
---
_id: '65625'
author:
- first_name: Olga
full_name: Friesen, Olga
id: '44026'
last_name: Friesen
- first_name: Jonas
full_name: Hölscher, Jonas
id: '73952'
last_name: Hölscher
- first_name: Michael B. K.
full_name: Siegmund, Michael B. K.
last_name: Siegmund
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Friesen O, Hölscher J, Siegmund MBK, Claes L, Henning B. Experimental and
Numerical Investigation of Jump Phenomena in the Frequency Response of Piezoelectric
Systems. In: ; 2026.'
apa: Friesen, O., Hölscher, J., Siegmund, M. B. K., Claes, L., & Henning, B.
(2026). Experimental and Numerical Investigation of Jump Phenomena in the Frequency
Response of Piezoelectric Systems.
bibtex: '@inproceedings{Friesen_Hölscher_Siegmund_Claes_Henning_2026, place={96th
Annual Meeting of the International Association of Applied Mathematics and Mechanics
(GAMM)}, title={Experimental and Numerical Investigation of Jump Phenomena in
the Frequency Response of Piezoelectric Systems}, author={Friesen, Olga and Hölscher,
Jonas and Siegmund, Michael B. K. and Claes, Leander and Henning, Bernd}, year={2026}
}'
chicago: Friesen, Olga, Jonas Hölscher, Michael B. K. Siegmund, Leander Claes, and
Bernd Henning. “Experimental and Numerical Investigation of Jump Phenomena in
the Frequency Response of Piezoelectric Systems.” 96th Annual Meeting of the International
Association of Applied Mathematics and Mechanics (GAMM), 2026.
ieee: O. Friesen, J. Hölscher, M. B. K. Siegmund, L. Claes, and B. Henning, “Experimental
and Numerical Investigation of Jump Phenomena in the Frequency Response of Piezoelectric
Systems,” 2026.
mla: Friesen, Olga, et al. Experimental and Numerical Investigation of Jump Phenomena
in the Frequency Response of Piezoelectric Systems. 2026.
short: 'O. Friesen, J. Hölscher, M.B.K. Siegmund, L. Claes, B. Henning, in: 96th
Annual Meeting of the International Association of Applied Mathematics and Mechanics
(GAMM), 2026.'
date_created: 2026-05-13T14:24:34Z
date_updated: 2026-05-13T14:25:54Z
department:
- _id: '49'
language:
- iso: eng
place: 96th Annual Meeting of the International Association of Applied Mathematics
and Mechanics (GAMM)
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
status: public
title: Experimental and Numerical Investigation of Jump Phenomena in the Frequency
Response of Piezoelectric Systems
type: conference_abstract
user_id: '44026'
year: '2026'
...
---
_id: '65606'
abstract:
- lang: eng
text: Sound capture by microphone arrays opens the possibility to exploit spatial,
in addition to spectral, information for diarization and signal enhancement, two
important tasks in meeting transcription. However, there is no one-to-one mapping
of positions in space to speakers if speakers move. Here, we address this by proposing
a novel joint spatial and spectral mixture model, whose two submodels are loosely
coupled by modeling the relationship between speaker and position index probabilistically.
Thus, spatial and spectral information can be jointly exploited, while at the
same time allowing for speakers speaking from different positions. Experiments
on the LibriCSS data set with simulated speaker position changes show great improvements
over tightly coupled subsystems.
author:
- first_name: Adrian Tobias
full_name: Meise, Adrian Tobias
id: '79268'
last_name: Meise
- first_name: Tobias
full_name: Cord-Landwehr, Tobias
id: '44393'
last_name: Cord-Landwehr
- first_name: Christoph
full_name: Boeddeker, Christoph
id: '40767'
last_name: Boeddeker
- first_name: Marc
full_name: Delcroix, Marc
last_name: Delcroix
- first_name: Tomohiro
full_name: Nakatani, Tomohiro
last_name: Nakatani
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Meise AT, Cord-Landwehr T, Boeddeker C, Delcroix M, Nakatani T, Haeb-Umbach
R. Loose Coupling of Spectral and Spatial Models for Multi-Channel Diarization
and Enhancement of Meetings in Dynamic Environments. In: ICASSP 2026 - 2026
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP).
IEEE; 2026. doi:10.1109/icassp55912.2026.11463540'
apa: Meise, A. T., Cord-Landwehr, T., Boeddeker, C., Delcroix, M., Nakatani, T.,
& Haeb-Umbach, R. (2026). Loose Coupling of Spectral and Spatial Models for
Multi-Channel Diarization and Enhancement of Meetings in Dynamic Environments.
ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech and Signal
Processing (ICASSP). 2026 IEEE International Conference on Acoustics, Speech
and Signal Processing (ICASSP) , Barcelona. https://doi.org/10.1109/icassp55912.2026.11463540
bibtex: '@inproceedings{Meise_Cord-Landwehr_Boeddeker_Delcroix_Nakatani_Haeb-Umbach_2026,
title={Loose Coupling of Spectral and Spatial Models for Multi-Channel Diarization
and Enhancement of Meetings in Dynamic Environments}, DOI={10.1109/icassp55912.2026.11463540},
booktitle={ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech
and Signal Processing (ICASSP)}, publisher={IEEE}, author={Meise, Adrian Tobias
and Cord-Landwehr, Tobias and Boeddeker, Christoph and Delcroix, Marc and Nakatani,
Tomohiro and Haeb-Umbach, Reinhold}, year={2026} }'
chicago: Meise, Adrian Tobias, Tobias Cord-Landwehr, Christoph Boeddeker, Marc Delcroix,
Tomohiro Nakatani, and Reinhold Haeb-Umbach. “Loose Coupling of Spectral and Spatial
Models for Multi-Channel Diarization and Enhancement of Meetings in Dynamic Environments.”
In ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech and
Signal Processing (ICASSP). IEEE, 2026. https://doi.org/10.1109/icassp55912.2026.11463540.
ieee: 'A. T. Meise, T. Cord-Landwehr, C. Boeddeker, M. Delcroix, T. Nakatani, and
R. Haeb-Umbach, “Loose Coupling of Spectral and Spatial Models for Multi-Channel
Diarization and Enhancement of Meetings in Dynamic Environments,” presented at
the 2026 IEEE International Conference on Acoustics, Speech and Signal Processing
(ICASSP) , Barcelona, 2026, doi: 10.1109/icassp55912.2026.11463540.'
mla: Meise, Adrian Tobias, et al. “Loose Coupling of Spectral and Spatial Models
for Multi-Channel Diarization and Enhancement of Meetings in Dynamic Environments.”
ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech and Signal
Processing (ICASSP), IEEE, 2026, doi:10.1109/icassp55912.2026.11463540.
short: 'A.T. Meise, T. Cord-Landwehr, C. Boeddeker, M. Delcroix, T. Nakatani, R.
Haeb-Umbach, in: ICASSP 2026 - 2026 IEEE International Conference on Acoustics,
Speech and Signal Processing (ICASSP), IEEE, 2026.'
conference:
location: Barcelona
name: ' 2026 IEEE International Conference on Acoustics, Speech and Signal Processing
(ICASSP) '
date_created: 2026-05-11T14:20:48Z
date_updated: 2026-05-15T08:17:25Z
department:
- _id: '54'
- _id: '1063'
doi: 10.1109/icassp55912.2026.11463540
external_id:
arxiv:
- https://arxiv.org/abs/2601.16077
keyword:
- mixture models
- meeting processing
- diarization
- source separation
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/pdf/2601.16077
oa: '1'
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech
and Signal Processing (ICASSP)
publisher: IEEE
status: public
title: Loose Coupling of Spectral and Spatial Models for Multi-Channel Diarization
and Enhancement of Meetings in Dynamic Environments
type: conference
user_id: '79268'
year: '2026'
...
---
_id: '57866'
abstract:
- lang: eng
text: "The theory of Total Function NP (TFNP) and its subclasses says that, even
if\r\none is promised an efficiently verifiable proof exists for a problem, finding\r\nthis
proof can be intractable. Despite the success of the theory at showing\r\nintractability
of problems such as computing Brouwer fixed points and Nash\r\nequilibria, subclasses
of TFNP remain arguably few and far between. In this\r\nwork, we define two new
subclasses of TFNP borne of the study of complex\r\npolynomial systems: Multi-homogeneous
Systems (MHS) and Sparse Fundamental\r\nTheorem of Algebra (SFTA). The first of
these is based on B\\'ezout's theorem\r\nfrom algebraic geometry, marking the
first TFNP subclass based on an algebraic\r\ngeometric principle. At the heart
of our study is the computational problem\r\nknown as Quantum SAT (QSAT) with
a System of Distinct Representatives (SDR),\r\nfirst studied by [Laumann, L\\\"auchli,
Moessner, Scardicchio, and Sondhi 2010].\r\nAmong other results, we show that
QSAT with SDR is MHS-complete, thus giving\r\nnot only the first link between
quantum complexity theory and TFNP, but also\r\nthe first TFNP problem whose classical
variant (SAT with SDR) is easy but whose\r\nquantum variant is hard. We also show
how to embed the roots of a sparse,\r\nhigh-degree, univariate polynomial into
QSAT with SDR, obtaining that SFTA is\r\ncontained in a zero-error version of
MHS. We conjecture this construction also\r\nworks in the low-error setting, which
would imply SFTA is contained in MHS."
author:
- first_name: Marco
full_name: Aldi, Marco
last_name: Aldi
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
- first_name: Dorian
full_name: Rudolph, Dorian
id: '57863'
last_name: Rudolph
citation:
ama: 'Aldi M, Gharibian S, Rudolph D. An unholy trinity: TFNP, polynomial systems,
and the quantum satisfiability problem. In: 17th Innovations in Theoretical
Computer Science Conference (ITCS 2026). Vol 362. ; 2026:7:1-7:24.'
apa: 'Aldi, M., Gharibian, S., & Rudolph, D. (2026). An unholy trinity: TFNP,
polynomial systems, and the quantum satisfiability problem. 17th Innovations
in Theoretical Computer Science Conference (ITCS 2026), 362, 7:1-7:24.'
bibtex: '@inproceedings{Aldi_Gharibian_Rudolph_2026, title={An unholy trinity: TFNP,
polynomial systems, and the quantum satisfiability problem}, volume={362}, booktitle={17th
Innovations in Theoretical Computer Science Conference (ITCS 2026)}, author={Aldi,
Marco and Gharibian, Sevag and Rudolph, Dorian}, year={2026}, pages={7:1-7:24}
}'
chicago: 'Aldi, Marco, Sevag Gharibian, and Dorian Rudolph. “An Unholy Trinity:
TFNP, Polynomial Systems, and the Quantum Satisfiability Problem.” In 17th
Innovations in Theoretical Computer Science Conference (ITCS 2026), 362:7:1-7:24,
2026.'
ieee: 'M. Aldi, S. Gharibian, and D. Rudolph, “An unholy trinity: TFNP, polynomial
systems, and the quantum satisfiability problem,” in 17th Innovations in Theoretical
Computer Science Conference (ITCS 2026), 2026, vol. 362, p. 7:1-7:24.'
mla: 'Aldi, Marco, et al. “An Unholy Trinity: TFNP, Polynomial Systems, and the
Quantum Satisfiability Problem.” 17th Innovations in Theoretical Computer
Science Conference (ITCS 2026), vol. 362, 2026, p. 7:1-7:24.'
short: 'M. Aldi, S. Gharibian, D. Rudolph, in: 17th Innovations in Theoretical Computer
Science Conference (ITCS 2026), 2026, p. 7:1-7:24.'
date_created: 2024-12-30T13:55:27Z
date_updated: 2026-05-15T08:40:28Z
department:
- _id: '7'
- _id: '623'
external_id:
arxiv:
- '2412.19623'
intvolume: ' 362'
language:
- iso: eng
page: 7:1-7:24
publication: 17th Innovations in Theoretical Computer Science Conference (ITCS 2026)
publication_status: published
status: public
title: 'An unholy trinity: TFNP, polynomial systems, and the quantum satisfiability
problem'
type: conference
user_id: '71541'
volume: 362
year: '2026'
...
---
_id: '65631'
abstract:
- lang: eng
text: "Abstract\r\n \r\n Mathematics
textbooks used to be the key resource for students’ self-regulated learning of
mathematics. Primarily due to the digitalization of society, students have potentially
greater access to a wider range of resources such as internet search engines,
learning platforms, educational videos, and Generative AI. This study investigates
the role of the mathematics textbook in comparison to other resources within students’
self-regulated learning practices. Data were collected via a survey of 1101 German
secondary students, representing three school types (\r\n Gymnasium\r\n
\ ,\r\n Gesamtschule\r\n
\ ,\r\n Realschule\r\n
\ ) and three grade levels (6, 9, and upper secondary). The
questionnaire assessed the frequency of resource use in and outside class, reasons
and purposes of use, and resource-based strategies when facing learning challenges
outside class. Results show that the printed mathematics textbook is the most
frequently used resource both in class and outside class. The textbook remains
the most relevant resource for key purposes, such as an aid for doing homework
and preparing for tests and exams. However, its dominance diminishes with age:
in upper secondary school, students increasingly rely on self-created notes, and
online resources. Correlation analyses reveal moderate to strong links between
in-class and out-of-class use, suggesting an association between resource use
and classroom culture. The findings underscore the textbook’s enduring centrality
as a foundational, trusted resource within a dynamic and increasingly diverse
learning environment. This study calls for pedagogical approaches that integrate
textbooks more intentionally within broader resource systems, supporting students’
agency and strategic resource selection in an era of digital abundance.\r\n "
article_type: original
author:
- first_name: Lea
full_name: Stallmeister, Lea
id: '63369'
last_name: Stallmeister
- first_name: Sebastian
full_name: Rezat, Sebastian
id: '31132'
last_name: Rezat
citation:
ama: Stallmeister L, Rezat S. The role of the mathematics textbook in times of resource
diversity. Educational Studies in Mathematics. Published online 2026. doi:10.1007/s10649-026-10511-7
apa: Stallmeister, L., & Rezat, S. (2026). The role of the mathematics textbook
in times of resource diversity. Educational Studies in Mathematics. https://doi.org/10.1007/s10649-026-10511-7
bibtex: '@article{Stallmeister_Rezat_2026, title={The role of the mathematics textbook
in times of resource diversity}, DOI={10.1007/s10649-026-10511-7},
journal={Educational Studies in Mathematics}, publisher={Springer Science and
Business Media LLC}, author={Stallmeister, Lea and Rezat, Sebastian}, year={2026}
}'
chicago: Stallmeister, Lea, and Sebastian Rezat. “The Role of the Mathematics Textbook
in Times of Resource Diversity.” Educational Studies in Mathematics, 2026.
https://doi.org/10.1007/s10649-026-10511-7.
ieee: 'L. Stallmeister and S. Rezat, “The role of the mathematics textbook in times
of resource diversity,” Educational Studies in Mathematics, 2026, doi:
10.1007/s10649-026-10511-7.'
mla: Stallmeister, Lea, and Sebastian Rezat. “The Role of the Mathematics Textbook
in Times of Resource Diversity.” Educational Studies in Mathematics, Springer
Science and Business Media LLC, 2026, doi:10.1007/s10649-026-10511-7.
short: L. Stallmeister, S. Rezat, Educational Studies in Mathematics (2026).
date_created: 2026-05-17T14:32:31Z
date_updated: 2026-05-17T14:40:54Z
ddc:
- '370'
department:
- _id: '360'
doi: 10.1007/s10649-026-10511-7
keyword:
- mathematics
- textbooks
- userstudy
- resources
- digital resources
- students
- secondary eduction
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1007/s10649-026-10511-7
oa: '1'
publication: Educational Studies in Mathematics
publication_identifier:
issn:
- 0013-1954
- 1573-0816
publication_status: published
publisher: Springer Science and Business Media LLC
quality_controlled: '1'
status: public
title: The role of the mathematics textbook in times of resource diversity
type: journal_article
user_id: '31132'
year: '2026'
...
---
_id: '65242'
abstract:
- lang: eng
text: With the growing demand for lightweight solutions to reduce emissions, especially
in the transportation, automotive and aerospace sectors, recyclable, continuous
fiber-reinforced plastic composite laminates with a thermoplastic matrix are of
rising interest. To achieve their maximum mechanical properties, the fiber-matrix
adhesion (FMA) is critical. In this work, continuous fiber-reinforced thermoplastic
laminates (CFRTPL) with a polypropylene (PP) matrix and twill woven glass fiber
fabrics are produced by film stacking. The films used contain different amounts
of maleic-anhydride-grafted PP (MA-g-PP) as a coupling agent to produce CFRTPL
of different mechanical strengths. To analyze the FMA, the CFRTPL are subjected
to Charpy-impact and tensile tests. Additionally, single fiber pull-out tests
(SFPT) are conducted to further investigate the effect of MA-g-PP on the FMA.
The results of the SFPT show an improvement in apparent interfacial shear strength
(AIFSS) when the MA-g-PP content is increased, which can be attributed to an increase
in FMA. However, the research shows that MA-g-PP has a low impact on the mechanical
properties if the force is applied parallel to the warp and weft threads during
tensile testing and the results of the Charpy-impact testing suffer from embrittlement
of the matrix material. Subsequently, the results of this study are compared to
three-point flexural tests conducted in a previous study. It can be concluded
that tensile and impact tests are not suited to investigate FMA on a macroscopic
scale, while SFPT and flexural tests provide a better alternative.
author:
- first_name: Elmar
full_name: Moritzer, Elmar
id: '20531'
last_name: Moritzer
- first_name: Philipp
full_name: Brandes, Philipp
id: '70091'
last_name: Brandes
orcid: 0009-0005-9707-0885
- first_name: Maurice
full_name: Wittler, Maurice
id: '76071'
last_name: Wittler
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Mareen
full_name: Wippermann, Mareen
id: '74624'
last_name: Wippermann
- first_name: Markus
full_name: Haag, Markus
last_name: Haag
- first_name: Thomas
full_name: Gries, Thomas
last_name: Gries
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: Moritzer E, Brandes P, Wittler M, et al. Fiber-matrix adhesion in glass fiber
reinforced thermoplastic composite laminates and its effect on mechanical properties.
International Polymer Processing. Published online 2026. doi:10.1515/ipp-2025-0077
apa: Moritzer, E., Brandes, P., Wittler, M., Claes, L., Wippermann, M., Haag, M.,
Gries, T., & Henning, B. (2026). Fiber-matrix adhesion in glass fiber reinforced
thermoplastic composite laminates and its effect on mechanical properties. International
Polymer Processing. https://doi.org/10.1515/ipp-2025-0077
bibtex: '@article{Moritzer_Brandes_Wittler_Claes_Wippermann_Haag_Gries_Henning_2026,
title={Fiber-matrix adhesion in glass fiber reinforced thermoplastic composite
laminates and its effect on mechanical properties}, DOI={10.1515/ipp-2025-0077},
journal={International Polymer Processing}, publisher={Walter de Gruyter GmbH},
author={Moritzer, Elmar and Brandes, Philipp and Wittler, Maurice and Claes, Leander
and Wippermann, Mareen and Haag, Markus and Gries, Thomas and Henning, Bernd},
year={2026} }'
chicago: Moritzer, Elmar, Philipp Brandes, Maurice Wittler, Leander Claes, Mareen
Wippermann, Markus Haag, Thomas Gries, and Bernd Henning. “Fiber-Matrix Adhesion
in Glass Fiber Reinforced Thermoplastic Composite Laminates and Its Effect on
Mechanical Properties.” International Polymer Processing, 2026. https://doi.org/10.1515/ipp-2025-0077.
ieee: 'E. Moritzer et al., “Fiber-matrix adhesion in glass fiber reinforced
thermoplastic composite laminates and its effect on mechanical properties,” International
Polymer Processing, 2026, doi: 10.1515/ipp-2025-0077.'
mla: Moritzer, Elmar, et al. “Fiber-Matrix Adhesion in Glass Fiber Reinforced Thermoplastic
Composite Laminates and Its Effect on Mechanical Properties.” International
Polymer Processing, Walter de Gruyter GmbH, 2026, doi:10.1515/ipp-2025-0077.
short: E. Moritzer, P. Brandes, M. Wittler, L. Claes, M. Wippermann, M. Haag, T.
Gries, B. Henning, International Polymer Processing (2026).
date_created: 2026-03-30T14:14:33Z
date_updated: 2026-05-18T13:06:11Z
department:
- _id: '9'
- _id: '321'
- _id: '367'
- _id: '34'
- _id: '49'
doi: 10.1515/ipp-2025-0077
language:
- iso: eng
project:
- _id: '157'
grant_number: '495847374'
name: 'FaMOUS: Ein ultraschallbasiertes Messverfahren unter Berücksichtigung viskoelastischer
Eigenschaften zur Charakterisierung der Faser-Matrix-Haftung bei Organoblechen
sowie deren realitätsnahe Modellierung'
publication: International Polymer Processing
publication_identifier:
issn:
- 0930-777X
- 2195-8602
publication_status: published
publisher: Walter de Gruyter GmbH
quality_controlled: '1'
status: public
title: Fiber-matrix adhesion in glass fiber reinforced thermoplastic composite laminates
and its effect on mechanical properties
type: journal_article
user_id: '11829'
year: '2026'
...
---
_id: '65630'
abstract:
- lang: eng
text: 'Mathematics textbooks used to be the key resource for students’ self-regulated
learning of mathematics. Primarily due to the digitalization of society, students
have potentially greater access to a wider range of resources such as internet
search engines, learning platforms, educational videos, and Generative AI. This
study investigates the role of the mathematics textbook in comparison to other
resources within students’ self-regulated learning practices. Data were collected
via a survey of 1101 German secondary students, representing three school types
(Gymnasium, Gesamtschule, Realschule) and three grade levels (6, 9, and upper
secondary). The questionnaire assessed the frequency of resource use in and outside
class, reasons and purposes of use, and resource-based strategies when facing
learning challenges outside class. Results show that the printed mathematics textbook
is the most frequently used resource both in class and outside class. The textbook
remains the most relevant resource for key purposes, such as an aid for doing
homework and preparing for tests and exams. However, its dominance diminishes
with age: in upper secondary school, students increasingly rely on self-created
notes, and online resources. Correlation analyses reveal moderate to strong links
between in-class and out-of-class use, suggesting an association between resource
use and classroom culture. The findings underscore the textbook’s enduring centrality
as a foundational, trusted resource within a dynamic and increasingly diverse
learning environment. This study calls for pedagogical approaches that integrate
textbooks more intentionally within broader resource systems, supporting students’
agency and strategic resource selection in an era of digital abundance.'
author:
- first_name: Lea
full_name: Stallmeister, Lea
last_name: Stallmeister
- first_name: Sebastian
full_name: Rezat, Sebastian
last_name: Rezat
citation:
ama: Stallmeister L, Rezat S. The role of the mathematics textbook in times of resource
diversity. Educational Studies in Mathematics. Published online 2026. doi:10.1007/s10649-026-10511-7
apa: Stallmeister, L., & Rezat, S. (2026). The role of the mathematics textbook
in times of resource diversity. Educational Studies in Mathematics. https://doi.org/10.1007/s10649-026-10511-7
bibtex: '@article{Stallmeister_Rezat_2026, title={The role of the mathematics textbook
in times of resource diversity}, DOI={10.1007/s10649-026-10511-7},
journal={Educational Studies in Mathematics}, publisher={Springer}, author={Stallmeister,
Lea and Rezat, Sebastian}, year={2026} }'
chicago: Stallmeister, Lea, and Sebastian Rezat. “The Role of the Mathematics Textbook
in Times of Resource Diversity.” Educational Studies in Mathematics, 2026.
https://doi.org/10.1007/s10649-026-10511-7.
ieee: 'L. Stallmeister and S. Rezat, “The role of the mathematics textbook in times
of resource diversity,” Educational Studies in Mathematics, 2026, doi:
10.1007/s10649-026-10511-7.'
mla: Stallmeister, Lea, and Sebastian Rezat. “The Role of the Mathematics Textbook
in Times of Resource Diversity.” Educational Studies in Mathematics, Springer,
2026, doi:10.1007/s10649-026-10511-7.
short: L. Stallmeister, S. Rezat, Educational Studies in Mathematics (2026).
date_created: 2026-05-16T14:27:57Z
date_updated: 2026-05-16T14:33:38Z
department:
- _id: '98'
doi: 10.1007/s10649-026-10511-7
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1007/s10649-026-10511-7
oa: '1'
publication: Educational Studies in Mathematics
publication_status: published
publisher: Springer
status: public
title: The role of the mathematics textbook in times of resource diversity
type: journal_article
user_id: '63369'
year: '2026'
...
---
_id: '65645'
abstract:
- lang: eng
text: Curriculum material is often designed to address content-specific
intended learning goals. However, research indicates that teachers’ personal goals
may cause misalignments between their implementation of curriculum material and
its intended learning goals. This study aims to investigate misalignments between
teachers’ implementation of curriculum material and its intended learning goals
and to which extent they are caused by teachers’ personal goals. To reach this
aim, a qualitative study was conducted to examine how eight vocational school
teachers implemented the learning activity “How many?” suggested for the initial
training of early childhood educators on the topic of set perception and determination
of cardinality. Each participant provided a lesson plan and self-recorded lesson
video on the topic of set perception and determination of cardinality. In addition,
participants were interviewed on how they used the provided curriculum material
for designing their lessons and their potential reasons to adapt or omit “How
many?”. To evaluate their lesson design’s alignment with the activity’s intended
learning goals, the participants' lesson plans were analyzed using qualitative
content analysis. Triangulation of the findings with the interview data revealed
that only one participant fully adopted the intended learning goals as her own
and implemented the activity completely in line with its intended learning goals.
Meanwhile, the remaining participants’ personal goals, such as reducing math anxiety,
seemed to cause misalignments regarding the intended learning goals. The study's
results detail further constraints and affordances to the alignment between teachers’
lesson designs and learning goals intended by curriculum material. It is followed
that it is central to support teachers in adopting intended learning goals as
their personal goals. Otherwise, teachers’ classroom implementation of curriculum
material may not suffice to reach desired outcomes.
article_number: em0883
author:
- first_name: Alix
full_name: Richter, Alix
id: '93186'
last_name: Richter
- first_name: Julia
full_name: Bruns, Julia
id: '72183'
last_name: Bruns
orcid: https://orcid.org/0000-0002-6604-5864
citation:
ama: Richter A, Bruns J. All a question of the goal? Re-tracing (mis)alignments
between teachers’ implementations of curriculum material and intended learning
goals in the context of early childhood educator training in Germany. International
Electronic Journal of Mathematics Education. 2026;21(2). doi:10.29333/iejme/18564
apa: Richter, A., & Bruns, J. (2026). All a question of the goal? Re-tracing
(mis)alignments between teachers’ implementations of curriculum material and intended
learning goals in the context of early childhood educator training in Germany.
International Electronic Journal of Mathematics Education, 21(2),
Article em0883. https://doi.org/10.29333/iejme/18564
bibtex: '@article{Richter_Bruns_2026, title={All a question of the goal? Re-tracing
(mis)alignments between teachers’ implementations of curriculum material and intended
learning goals in the context of early childhood educator training in Germany},
volume={21}, DOI={10.29333/iejme/18564},
number={2em0883}, journal={International Electronic Journal of Mathematics Education},
publisher={Modestum Ltd}, author={Richter, Alix and Bruns, Julia}, year={2026}
}'
chicago: Richter, Alix, and Julia Bruns. “All a Question of the Goal? Re-Tracing
(Mis)Alignments between Teachers’ Implementations of Curriculum Material and Intended
Learning Goals in the Context of Early Childhood Educator Training in Germany.”
International Electronic Journal of Mathematics Education 21, no. 2 (2026).
https://doi.org/10.29333/iejme/18564.
ieee: 'A. Richter and J. Bruns, “All a question of the goal? Re-tracing (mis)alignments
between teachers’ implementations of curriculum material and intended learning
goals in the context of early childhood educator training in Germany,” International
Electronic Journal of Mathematics Education, vol. 21, no. 2, Art. no. em0883,
2026, doi: 10.29333/iejme/18564.'
mla: Richter, Alix, and Julia Bruns. “All a Question of the Goal? Re-Tracing (Mis)Alignments
between Teachers’ Implementations of Curriculum Material and Intended Learning
Goals in the Context of Early Childhood Educator Training in Germany.” International
Electronic Journal of Mathematics Education, vol. 21, no. 2, em0883, Modestum
Ltd, 2026, doi:10.29333/iejme/18564.
short: A. Richter, J. Bruns, International Electronic Journal of Mathematics Education
21 (2026).
date_created: 2026-05-19T13:52:04Z
date_updated: 2026-05-19T14:00:34Z
department:
- _id: '611'
doi: 10.29333/iejme/18564
intvolume: ' 21'
issue: '2'
language:
- iso: eng
publication: International Electronic Journal of Mathematics Education
publication_identifier:
issn:
- 1306-3030
publication_status: published
publisher: Modestum Ltd
status: public
title: All a question of the goal? Re-tracing (mis)alignments between teachers’ implementations
of curriculum material and intended learning goals in the context of early childhood
educator training in Germany
type: journal_article
user_id: '72183'
volume: 21
year: '2026'
...
---
_id: '65013'
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
full_name: A. de A. Rocha, Antonio
last_name: A. de A. Rocha
- first_name: Lin
full_name: Wang, Lin
id: '102868'
last_name: Wang
orcid: 0000-0001-7181-6128
citation:
ama: 'Illian M, Khalili R, A. de A. Rocha A, Wang L. Cells on Autopilot: Adaptive
Cell (Re)Selection via Reinforcement Learning. In: 2026 24th International
Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks
(WiOpt). IFIP; 2026.'
apa: 'Illian, M., Khalili, R., A. de A. Rocha, A., & Wang, L. (2026). Cells
on Autopilot: Adaptive Cell (Re)Selection via Reinforcement Learning. 2026
24th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and
Wireless Networks (WiOpt).'
bibtex: '@inproceedings{Illian_Khalili_A. de A. Rocha_Wang_2026, title={Cells on
Autopilot: Adaptive Cell (Re)Selection via Reinforcement Learning}, booktitle={2026
24th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and
Wireless Networks (WiOpt)}, publisher={IFIP}, author={Illian, Marvin and Khalili,
Ramin and A. de A. Rocha, Antonio 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.” In 2026
24th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and
Wireless Networks (WiOpt). IFIP, 2026.'
ieee: 'M. Illian, R. Khalili, A. A. de A. Rocha, and L. Wang, “Cells on Autopilot:
Adaptive Cell (Re)Selection via Reinforcement Learning,” 2026.'
mla: 'Illian, Marvin, et al. “Cells on Autopilot: Adaptive Cell (Re)Selection via
Reinforcement Learning.” 2026 24th International Symposium on Modeling and
Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt), IFIP, 2026.'
short: 'M. Illian, R. Khalili, A. A. de A. Rocha, L. Wang, in: 2026 24th International
Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks
(WiOpt), IFIP, 2026.'
date_created: 2026-03-16T14:46:45Z
date_updated: 2026-05-20T08:45:27Z
department:
- _id: '75'
language:
- iso: eng
publication: 2026 24th International Symposium on Modeling and Optimization in Mobile,
Ad Hoc, and Wireless Networks (WiOpt)
publisher: IFIP
quality_controlled: '1'
status: public
title: 'Cells on Autopilot: Adaptive Cell (Re)Selection via Reinforcement Learning'
type: conference
user_id: '44169'
year: '2026'
...
---
_id: '65665'
article_number: '101930'
author:
- first_name: Mehdi
full_name: Ahmadi, Mehdi
id: '98967'
last_name: Ahmadi
- first_name: Florian
full_name: Schlosser, Florian
id: '88614'
last_name: Schlosser
- first_name: Denis
full_name: Divkovic, Denis
id: '89059'
last_name: Divkovic
- first_name: Henning
full_name: Meschede, Henning
last_name: Meschede
citation:
ama: 'Ahmadi M, Schlosser F, Divkovic D, Meschede H. Cost-effective and low-carbon
cooling strategies for data centers integrated into wind turbine towers. Energy
Conversion and Management: X. 2026;31. doi:10.1016/j.ecmx.2026.101930'
apa: 'Ahmadi, M., Schlosser, F., Divkovic, D., & Meschede, H. (2026). Cost-effective
and low-carbon cooling strategies for data centers integrated into wind turbine
towers. Energy Conversion and Management: X, 31, Article 101930.
https://doi.org/10.1016/j.ecmx.2026.101930'
bibtex: '@article{Ahmadi_Schlosser_Divkovic_Meschede_2026, title={Cost-effective
and low-carbon cooling strategies for data centers integrated into wind turbine
towers}, volume={31}, DOI={10.1016/j.ecmx.2026.101930},
number={101930}, journal={Energy Conversion and Management: X}, publisher={Elsevier
BV}, author={Ahmadi, Mehdi and Schlosser, Florian and Divkovic, Denis and Meschede,
Henning}, year={2026} }'
chicago: 'Ahmadi, Mehdi, Florian Schlosser, Denis Divkovic, and Henning Meschede.
“Cost-Effective and Low-Carbon Cooling Strategies for Data Centers Integrated
into Wind Turbine Towers.” Energy Conversion and Management: X 31 (2026).
https://doi.org/10.1016/j.ecmx.2026.101930.'
ieee: 'M. Ahmadi, F. Schlosser, D. Divkovic, and H. Meschede, “Cost-effective and
low-carbon cooling strategies for data centers integrated into wind turbine towers,”
Energy Conversion and Management: X, vol. 31, Art. no. 101930, 2026, doi:
10.1016/j.ecmx.2026.101930.'
mla: 'Ahmadi, Mehdi, et al. “Cost-Effective and Low-Carbon Cooling Strategies for
Data Centers Integrated into Wind Turbine Towers.” Energy Conversion and Management:
X, vol. 31, 101930, Elsevier BV, 2026, doi:10.1016/j.ecmx.2026.101930.'
short: 'M. Ahmadi, F. Schlosser, D. Divkovic, H. Meschede, Energy Conversion and
Management: X 31 (2026).'
date_created: 2026-05-20T13:18:46Z
date_updated: 2026-05-20T13:33:48Z
department:
- _id: '644'
doi: 10.1016/j.ecmx.2026.101930
intvolume: ' 31'
language:
- iso: eng
project:
- _id: '449'
name: 'ESN4NW: Energieoptimierte Supercomputer-Netzwerke durch die Nutzung von Windenergie'
publication: 'Energy Conversion and Management: X'
publication_identifier:
issn:
- 2590-1745
publication_status: published
publisher: Elsevier BV
status: public
title: Cost-effective and low-carbon cooling strategies for data centers integrated
into wind turbine towers
type: journal_article
user_id: '98967'
volume: 31
year: '2026'
...
---
_id: '65670'
abstract:
- lang: eng
text: "Ensuring the veracity of assertions is {vital for building reliable and consistent
knowledge graphs}. \r\nA variety of automatic fact-checking approaches have been
proposed over the past decade. Among these, path-based fact-checking approaches
are particularly attractive due to their independence of supplementary external
knowledge and their faster runtimes compared to methods reliant on external corpora
or embeddings. \r\nHowever, the effectiveness of these approaches is fundamentally
limited by the incompleteness of existing knowledge graphs, which often lack the
paths necessary to support or refute assertions. \r\nTo address this limitation,
we propose \\system{}, a framework that supplements the knowledge graph with shallow
knowledge---automatically extracted RDF assertions from external unstructured
sources---even if this additional knowledge may not always fit a well-defined
ontology nor be fully verified. By appending such shallow knowledge, we enhance
the graph’s coverage and increase the chances of finding relevant evidence for
fact checking. Comprehensive experiments on three widely used benchmark datasets
demonstrate that integrating \\system{} consistently and significantly enhances
the performance of {state-of-the-art path-based fact-checking approaches}, yielding
improvements of up to 0.24 in Area Under the Receiver Operating Characteristic
Curve (AUROC). These results establish \\system{} as a broadly applicable auxiliary
component for improving the reliability and coverage of automatic fact checking
in knowledge graphs. Our code is open-source and can be found at \\url{https://github.com/dice-group/ShallKnow}."
author:
- first_name: Umair
full_name: Qudus, Umair
id: '83392'
last_name: Qudus
orcid: 0000-0001-6714-8729
- first_name: Neha
full_name: Pokharel, Neha
last_name: Pokharel
- first_name: Michael
full_name: Röder, Michael
id: '67199'
last_name: Röder
orcid: https://orcid.org/0000-0002-8609-8277
- first_name: Axel-Cyrille
full_name: Ngonga Ngomo, Axel-Cyrille
id: '65716'
last_name: Ngonga Ngomo
citation:
ama: 'Qudus U, Pokharel N, Röder M, Ngonga Ngomo A-C. No Need to Be a Know-It-All:
Fact Checking with Shallow Knowledge. In: Lecture Notes in Computer Science.
Springer Nature Switzerland; 2026. doi:10.1007/978-3-032-25156-5_23'
apa: 'Qudus, U., Pokharel, N., Röder, M., & Ngonga Ngomo, A.-C. (2026). No Need
to Be a Know-It-All: Fact Checking with Shallow Knowledge. In Lecture Notes
in Computer Science. Springer Nature Switzerland. https://doi.org/10.1007/978-3-032-25156-5_23'
bibtex: '@inbook{Qudus_Pokharel_Röder_Ngonga Ngomo_2026, place={Cham}, title={No
Need to Be a Know-It-All: Fact Checking with Shallow Knowledge}, DOI={10.1007/978-3-032-25156-5_23},
booktitle={Lecture Notes in Computer Science}, publisher={Springer Nature Switzerland},
author={Qudus, Umair and Pokharel, Neha and Röder, Michael and Ngonga Ngomo, Axel-Cyrille},
year={2026} }'
chicago: 'Qudus, Umair, Neha Pokharel, Michael Röder, and Axel-Cyrille Ngonga Ngomo.
“No Need to Be a Know-It-All: Fact Checking with Shallow Knowledge.” In Lecture
Notes in Computer Science. Cham: Springer Nature Switzerland, 2026. https://doi.org/10.1007/978-3-032-25156-5_23.'
ieee: 'U. Qudus, N. Pokharel, M. Röder, and A.-C. Ngonga Ngomo, “No Need to Be a Know-It-All:
Fact Checking with Shallow Knowledge,” in Lecture Notes in Computer Science,
Cham: Springer Nature Switzerland, 2026.'
mla: 'Qudus, Umair, et al. “No Need to Be a Know-It-All: Fact Checking with Shallow
Knowledge.” Lecture Notes in Computer Science, Springer Nature Switzerland,
2026, doi:10.1007/978-3-032-25156-5_23.'
short: 'U. Qudus, N. Pokharel, M. Röder, A.-C. Ngonga Ngomo, in: Lecture Notes in
Computer Science, Springer Nature Switzerland, Cham, 2026.'
date_created: 2026-05-21T11:45:24Z
date_updated: 2026-05-21T11:55:29Z
department:
- _id: '574'
doi: 10.1007/978-3-032-25156-5_23
keyword:
- fact checking
language:
- iso: eng
place: Cham
publication: Lecture Notes in Computer Science
publication_identifier:
isbn:
- '9783032251558'
- '9783032251565'
issn:
- 0302-9743
- 1611-3349
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: 'No Need to Be a Know-It-All: Fact Checking with Shallow Knowledge'
type: book_chapter
user_id: '83392'
year: '2026'
...
---
_id: '65566'
author:
- first_name: Anselm
full_name: Haak, Anselm
id: '109969'
last_name: Haak
- first_name: Patrick
full_name: Koopmann, Patrick
last_name: Koopmann
- first_name: Yasir
full_name: Mahmood, Yasir
id: '99353'
last_name: Mahmood
- first_name: Anni-Yasmin
full_name: Turhan, Anni-Yasmin
id: '104470'
last_name: Turhan
citation:
ama: 'Haak A, Koopmann P, Mahmood Y, Turhan A-Y. ABox Abduction for Inconsistent
Knowledge Bases under Repair Semantics. In: ; 2026.'
apa: Haak, A., Koopmann, P., Mahmood, Y., & Turhan, A.-Y. (2026). ABox Abduction
for Inconsistent Knowledge Bases under Repair Semantics. 23rd International
Conference on Principles of Knowledge Representation and Reasoning, Lisbon.
bibtex: '@inproceedings{Haak_Koopmann_Mahmood_Turhan_2026, title={ABox Abduction
for Inconsistent Knowledge Bases under Repair Semantics}, author={Haak, Anselm
and Koopmann, Patrick and Mahmood, Yasir and Turhan, Anni-Yasmin}, year={2026}
}'
chicago: Haak, Anselm, Patrick Koopmann, Yasir Mahmood, and Anni-Yasmin Turhan.
“ABox Abduction for Inconsistent Knowledge Bases under Repair Semantics,” 2026.
ieee: A. Haak, P. Koopmann, Y. Mahmood, and A.-Y. Turhan, “ABox Abduction for Inconsistent
Knowledge Bases under Repair Semantics,” presented at the 23rd International Conference
on Principles of Knowledge Representation and Reasoning, Lisbon, 2026.
mla: Haak, Anselm, et al. ABox Abduction for Inconsistent Knowledge Bases under
Repair Semantics. 2026.
short: 'A. Haak, P. Koopmann, Y. Mahmood, A.-Y. Turhan, in: 2026.'
conference:
end_date: 2026-07-23
location: Lisbon
name: 23rd International Conference on Principles of Knowledge Representation and
Reasoning
start_date: 2026-07-20
date_created: 2026-05-05T14:29:38Z
date_updated: 2026-05-21T08:26:07Z
department:
- _id: '888'
- _id: '574'
language:
- iso: eng
status: public
title: ABox Abduction for Inconsistent Knowledge Bases under Repair Semantics
type: conference
user_id: '109969'
year: '2026'
...
---
_id: '65682'
author:
- first_name: Mats
full_name: Vernholz, Mats
id: '76955'
last_name: Vernholz
orcid: 0000-0001-5175-357X
- first_name: Craig
full_name: Sims, Craig
last_name: Sims
- first_name: David
full_name: Treagust, David
last_name: Treagust
citation:
ama: 'Vernholz M, Sims C, Treagust D. From Time-Saving to Skill-Building: Reframing
Generative AI for Lesson-Planning—A Conceptual Design Paper. Education Sciences.
2026;16(5):782. doi:https://doi.org/10.3390/educsci16050782'
apa: 'Vernholz, M., Sims, C., & Treagust, D. (2026). From Time-Saving to Skill-Building:
Reframing Generative AI for Lesson-Planning—A Conceptual Design Paper. Education
Sciences, 16(5), 782. https://doi.org/10.3390/educsci16050782'
bibtex: '@article{Vernholz_Sims_Treagust_2026, title={From Time-Saving to Skill-Building:
Reframing Generative AI for Lesson-Planning—A Conceptual Design Paper}, volume={16},
DOI={https://doi.org/10.3390/educsci16050782},
number={5}, journal={Education Sciences}, author={Vernholz, Mats and Sims, Craig
and Treagust, David}, year={2026}, pages={782} }'
chicago: 'Vernholz, Mats, Craig Sims, and David Treagust. “From Time-Saving to Skill-Building:
Reframing Generative AI for Lesson-Planning—A Conceptual Design Paper.” Education
Sciences 16, no. 5 (2026): 782. https://doi.org/10.3390/educsci16050782.'
ieee: 'M. Vernholz, C. Sims, and D. Treagust, “From Time-Saving to Skill-Building:
Reframing Generative AI for Lesson-Planning—A Conceptual Design Paper,” Education
Sciences, vol. 16, no. 5, p. 782, 2026, doi: https://doi.org/10.3390/educsci16050782.'
mla: 'Vernholz, Mats, et al. “From Time-Saving to Skill-Building: Reframing Generative
AI for Lesson-Planning—A Conceptual Design Paper.” Education Sciences,
vol. 16, no. 5, 2026, p. 782, doi:https://doi.org/10.3390/educsci16050782.'
short: M. Vernholz, C. Sims, D. Treagust, Education Sciences 16 (2026) 782.
date_created: 2026-05-26T06:19:30Z
date_updated: 2026-05-26T06:22:45Z
ddc:
- '370'
department:
- _id: '300'
doi: https://doi.org/10.3390/educsci16050782
file:
- access_level: open_access
content_type: application/pdf
creator: maver001
date_created: 2026-05-26T06:19:27Z
date_updated: 2026-05-26T06:19:27Z
file_id: '65683'
file_name: education-16-00782-v2 (1).pdf
file_size: 2015567
relation: main_file
file_date_updated: 2026-05-26T06:19:27Z
has_accepted_license: '1'
intvolume: ' 16'
issue: '5'
language:
- iso: eng
oa: '1'
page: '782'
publication: Education Sciences
status: public
title: 'From Time-Saving to Skill-Building: Reframing Generative AI for Lesson-Planning—A
Conceptual Design Paper'
type: journal_article
user_id: '76955'
volume: 16
year: '2026'
...
---
_id: '64211'
author:
- first_name: Vivien
full_name: Wiebe, Vivien
id: '77748'
last_name: Wiebe
- first_name: Uta
full_name: Häsel-Weide, Uta
id: '60267'
last_name: Häsel-Weide
orcid: 0000-0001-6278-4240
citation:
ama: 'Wiebe V, Häsel-Weide U. Initiating and establishing mathematical practices
of determining and transforming numbers as a foundational skill in fostering mathematics
teaching. In: Mosvold R, Fauskanger J, Ferretti F, Vondrová N, Charles University,
Faculty of Education and ERME, eds. Proceedings of the Nineteenth ERME Topic
Conference: Connecting the Learning of Mathematics Teaching to Practice. ;
2026:122-129.'
apa: 'Wiebe, V., & Häsel-Weide, U. (2026). Initiating and establishing mathematical
practices of determining and transforming numbers as a foundational skill in fostering
mathematics teaching. In R. Mosvold, J. Fauskanger, F. Ferretti, N. Vondrová,
& Charles University, Faculty of Education and ERME (Eds.), Proceedings
of the Nineteenth ERME Topic Conference: Connecting the Learning of Mathematics
Teaching to Practice (pp. 122–129).'
bibtex: '@inproceedings{Wiebe_Häsel-Weide_2026, place={Prag}, title={ Initiating
and establishing mathematical practices of determining and transforming numbers
as a foundational skill in fostering mathematics teaching}, booktitle={Proceedings
of the Nineteenth ERME Topic Conference: Connecting the Learning of Mathematics
Teaching to Practice}, author={Wiebe, Vivien and Häsel-Weide, Uta}, editor={Mosvold,
R. and Fauskanger, J. and Ferretti, F. and Vondrová, N. and Charles University,
Faculty of Education and ERME}, year={2026}, pages={122–129} }'
chicago: 'Wiebe, Vivien, and Uta Häsel-Weide. “ Initiating and Establishing Mathematical
Practices of Determining and Transforming Numbers as a Foundational Skill in Fostering
Mathematics Teaching.” In Proceedings of the Nineteenth ERME Topic Conference:
Connecting the Learning of Mathematics Teaching to Practice, edited by R.
Mosvold, J. Fauskanger, F. Ferretti, N. Vondrová, and Charles University, Faculty
of Education and ERME, 122–29. Prag, 2026.'
ieee: 'V. Wiebe and U. Häsel-Weide, “ Initiating and establishing mathematical practices
of determining and transforming numbers as a foundational skill in fostering mathematics
teaching,” in Proceedings of the Nineteenth ERME Topic Conference: Connecting
the Learning of Mathematics Teaching to Practice, Prag, 2026, pp. 122–129.'
mla: 'Wiebe, Vivien, and Uta Häsel-Weide. “ Initiating and Establishing Mathematical
Practices of Determining and Transforming Numbers as a Foundational Skill in Fostering
Mathematics Teaching.” Proceedings of the Nineteenth ERME Topic Conference:
Connecting the Learning of Mathematics Teaching to Practice, edited by R.
Mosvold et al., 2026, pp. 122–29.'
short: 'V. Wiebe, U. Häsel-Weide, in: R. Mosvold, J. Fauskanger, F. Ferretti, N.
Vondrová, Charles University, Faculty of Education and ERME (Eds.), Proceedings
of the Nineteenth ERME Topic Conference: Connecting the Learning of Mathematics
Teaching to Practice, Prag, 2026, pp. 122–129.'
conference:
location: Prag
name: Nineteenth ERME Topic Conference
corporate_editor:
- Charles University, Faculty of Education and ERME
date_created: 2026-02-18T10:41:23Z
date_updated: 2026-05-26T07:56:19Z
department:
- _id: '543'
editor:
- first_name: R.
full_name: Mosvold, R.
last_name: Mosvold
- first_name: J.
full_name: Fauskanger, J.
last_name: Fauskanger
- first_name: F.
full_name: Ferretti, F.
last_name: Ferretti
- first_name: N.
full_name: Vondrová, N.
last_name: Vondrová
language:
- iso: eng
page: 122-129
place: Prag
publication: 'Proceedings of the Nineteenth ERME Topic Conference: Connecting the
Learning of Mathematics Teaching to Practice'
related_material:
link:
- relation: confirmation
url: https://hal.science/hal-05463964v1
status: public
title: ' Initiating and establishing mathematical practices of determining and transforming
numbers as a foundational skill in fostering mathematics teaching'
type: conference
user_id: '44184'
year: '2026'
...
---
_id: '65733'
abstract:
- lang: eng
text: "Abstract\r\n \r\n In
this paper, we study the computation of shortest paths within the\r\n geometric
amoebot model\r\n , a commonly used model for
programmable matter. Shortest paths are essential for various tasks and therefore
have been heavily investigated in many different contexts. We consider the\r\n
\ reconfigurable circuit extension\r\n
\ of the model where the amoebot structure is able to interconnect
amoebots by so-called circuits. These circuits permit the instantaneous transmission
of simple signals between connected amoebots. We propose distributed algorithms
for the\r\n shortest path forest problem\r\n
\ where, given a set of\r\n k\r\n
\ sources and a set of\r\n \r\n
\ \r\n $$\\ell
$$\r\n \r\n
\ ℓ\r\n \r\n
\ \r\n \r\n
\ destinations, the amoebot structure has to compute a forest
that connects each destination to its closest source on a shortest path. Our main
results are two algorithms for hole-free structures. The first algorithm constructs
a shortest path tree for a single source within\r\n \r\n
\ \r\n $$O(\\log
\\ell )$$\r\n \r\n
\ \r\n O\r\n
\ (\r\n log\r\n
\ ℓ\r\n )\r\n
\ \r\n \r\n
\ \r\n \r\n
\ rounds, and the second algorithm a shortest path forest for
an arbitrary number of sources within\r\n \r\n
\ \r\n $$O(\\log
n \\log ^2 k)$$\r\n \r\n
\ \r\n O\r\n
\ (\r\n log\r\n
\ n\r\n \r\n
\ log\r\n 2\r\n
\ \r\n k\r\n
\ )\r\n \r\n
\ \r\n \r\n
\ \r\n rounds. The
former algorithm also provides an\r\n O\r\n
\ (1) rounds solution for the\r\n single
pair shortest path problem\r\n (SPSP) and an\r\n
\ \r\n \r\n
\ $$O(\\log n)$$\r\n \r\n \r\n
\ O\r\n (\r\n
\ log\r\n n\r\n
\ )\r\n \r\n
\ \r\n \r\n
\ \r\n rounds solution
for the\r\n single source shortest path problem\r\n
\ (SSSP) since these problems are special cases of the considered
problem. Then, we adapt the latter algorithm to an offset version of the problem.
This allows us to solve the problem for amoebot structures with holes within\r\n
\ \r\n \r\n
\ $$O(h \\log ^3 n)$$\r\n
\ \r\n
\ \r\n O\r\n
\ (\r\n h\r\n
\ \r\n log\r\n
\ 3\r\n \r\n
\ n\r\n )\r\n
\ \r\n \r\n
\ \r\n \r\n
\ rounds w.h.p. where\r\n h\r\n
\ denotes the number of holes.\r\n "
article_number: '15'
author:
- first_name: Andreas
full_name: Padalkin, Andreas
id: '88238'
last_name: Padalkin
- first_name: Christian
full_name: Scheideler, Christian
id: '20792'
last_name: Scheideler
citation:
ama: Padalkin A, Scheideler C. Polylogarithmic time algorithms for shortest path
forests in programmable matter. Distributed Computing. 2026;39(2). doi:10.1007/s00446-026-00505-2
apa: Padalkin, A., & Scheideler, C. (2026). Polylogarithmic time algorithms
for shortest path forests in programmable matter. Distributed Computing,
39(2), Article 15. https://doi.org/10.1007/s00446-026-00505-2
bibtex: '@article{Padalkin_Scheideler_2026, title={Polylogarithmic time algorithms
for shortest path forests in programmable matter}, volume={39}, DOI={10.1007/s00446-026-00505-2},
number={215}, journal={Distributed Computing}, publisher={Springer Science and
Business Media LLC}, author={Padalkin, Andreas and Scheideler, Christian}, year={2026}
}'
chicago: Padalkin, Andreas, and Christian Scheideler. “Polylogarithmic Time Algorithms
for Shortest Path Forests in Programmable Matter.” Distributed Computing
39, no. 2 (2026). https://doi.org/10.1007/s00446-026-00505-2.
ieee: 'A. Padalkin and C. Scheideler, “Polylogarithmic time algorithms for shortest
path forests in programmable matter,” Distributed Computing, vol. 39, no.
2, Art. no. 15, 2026, doi: 10.1007/s00446-026-00505-2.'
mla: Padalkin, Andreas, and Christian Scheideler. “Polylogarithmic Time Algorithms
for Shortest Path Forests in Programmable Matter.” Distributed Computing,
vol. 39, no. 2, 15, Springer Science and Business Media LLC, 2026, doi:10.1007/s00446-026-00505-2.
short: A. Padalkin, C. Scheideler, Distributed Computing 39 (2026).
date_created: 2026-05-29T12:11:32Z
date_updated: 2026-05-29T12:13:09Z
department:
- _id: '34'
- _id: '7'
- _id: '79'
doi: 10.1007/s00446-026-00505-2
intvolume: ' 39'
issue: '2'
language:
- iso: eng
publication: Distributed Computing
publication_identifier:
issn:
- 0178-2770
- 1432-0452
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Polylogarithmic time algorithms for shortest path forests in programmable matter
type: journal_article
user_id: '15578'
volume: 39
year: '2026'
...
---
_id: '65745'
abstract:
- lang: eng
text: "Abstract\r\n In this work,
we address the numerical identification of entanglement in dynamical scenarios.
To this end, we consider different programs based on the restriction of the evolution
to the set of separable (i.e., non-entangled) states, together with the discretization
of the space of variables for numerical computations. As a first approach, we
apply linear splitting methods to the restricted, continuous equations of motion
derived from variational principles. We utilize an exchange interaction Hamiltonian
to confirm that the numerical and analytical solutions coincide in the limit of
small time steps. The application to different Hamiltonians shows the wide applicability
of the method to detect dynamical entanglement. To avoid the derivation of analytical
solutions for complex dynamics, we consider variational, numerical integration
schemes, introducing a variational discretization for Lagrangians linear in velocities.
Here, we examine and compare two approaches: one in which the system is discretized
before the restriction is applied, and another in which the restriction precedes
the discretization. We find that the \"first-discretize-then-restrict\" method
becomes numerically unstable, already for the example of an exchange-interaction
Hamiltonian, which can be an important consideration for the numerical analysis
of constrained quantum dynamics. Thereby, broadly applicable numerical tools,
including their limitations, for studying entanglement over time are established
for assessing the entangling power of processes that are used in quantum information
theory."
author:
- first_name: Christian
full_name: Offen, Christian
last_name: Offen
- first_name: Boris
full_name: Wembe, Boris
last_name: Wembe
- first_name: Laura
full_name: Ares, Laura
last_name: Ares
- first_name: Jan
full_name: Sperling, Jan
last_name: Sperling
- first_name: Sina
full_name: Ober-Blöbaum, Sina
last_name: Ober-Blöbaum
citation:
ama: 'Offen C, Wembe B, Ares L, Sperling J, Ober-Blöbaum S. Numerical approaches
to entangling dynamics from variational principles. Journal of Physics A: Mathematical
and Theoretical. Published online 2026. doi:10.1088/1751-8121/ae6d51'
apa: 'Offen, C., Wembe, B., Ares, L., Sperling, J., & Ober-Blöbaum, S. (2026).
Numerical approaches to entangling dynamics from variational principles. Journal
of Physics A: Mathematical and Theoretical. https://doi.org/10.1088/1751-8121/ae6d51'
bibtex: '@article{Offen_Wembe_Ares_Sperling_Ober-Blöbaum_2026, title={Numerical
approaches to entangling dynamics from variational principles}, DOI={10.1088/1751-8121/ae6d51},
journal={Journal of Physics A: Mathematical and Theoretical}, publisher={IOP Publishing},
author={Offen, Christian and Wembe, Boris and Ares, Laura and Sperling, Jan and
Ober-Blöbaum, Sina}, year={2026} }'
chicago: 'Offen, Christian, Boris Wembe, Laura Ares, Jan Sperling, and Sina Ober-Blöbaum.
“Numerical Approaches to Entangling Dynamics from Variational Principles.” Journal
of Physics A: Mathematical and Theoretical, 2026. https://doi.org/10.1088/1751-8121/ae6d51.'
ieee: 'C. Offen, B. Wembe, L. Ares, J. Sperling, and S. Ober-Blöbaum, “Numerical
approaches to entangling dynamics from variational principles,” Journal of
Physics A: Mathematical and Theoretical, 2026, doi: 10.1088/1751-8121/ae6d51.'
mla: 'Offen, Christian, et al. “Numerical Approaches to Entangling Dynamics from
Variational Principles.” Journal of Physics A: Mathematical and Theoretical,
IOP Publishing, 2026, doi:10.1088/1751-8121/ae6d51.'
short: 'C. Offen, B. Wembe, L. Ares, J. Sperling, S. Ober-Blöbaum, Journal of Physics
A: Mathematical and Theoretical (2026).'
date_created: 2026-06-01T09:36:09Z
date_updated: 2026-06-01T09:36:17Z
department:
- _id: '94'
doi: 10.1088/1751-8121/ae6d51
language:
- iso: eng
publication: 'Journal of Physics A: Mathematical and Theoretical'
publication_identifier:
issn:
- 1751-8113
- 1751-8121
publication_status: published
publisher: IOP Publishing
status: public
title: Numerical approaches to entangling dynamics from variational principles
type: journal_article
user_id: '95394'
year: '2026'
...
---
_id: '65742'
abstract:
- lang: eng
text: "Abstract\r\n In this work,
we address the numerical identification of entanglement in dynamical scenarios.
To this end, we consider different programs based on the restriction of the evolution
to the set of separable (i.e., non-entangled) states, together with the discretization
of the space of variables for numerical computations. As a first approach, we
apply linear splitting methods to the restricted, continuous equations of motion
derived from variational principles. We utilize an exchange interaction Hamiltonian
to confirm that the numerical and analytical solutions coincide in the limit of
small time steps. The application to different Hamiltonians shows the wide applicability
of the method to detect dynamical entanglement. To avoid the derivation of analytical
solutions for complex dynamics, we consider variational, numerical integration
schemes, introducing a variational discretization for Lagrangians linear in velocities.
Here, we examine and compare two approaches: one in which the system is discretized
before the restriction is applied, and another in which the restriction precedes
the discretization. We find that the \"first-discretize-then-restrict\" method
becomes numerically unstable, already for the example of an exchange-interaction
Hamiltonian, which can be an important consideration for the numerical analysis
of constrained quantum dynamics. Thereby, broadly applicable numerical tools,
including their limitations, for studying entanglement over time are established
for assessing the entangling power of processes that are used in quantum information
theory."
author:
- first_name: Christian
full_name: Offen, Christian
last_name: Offen
- first_name: Boris
full_name: Wembe, Boris
last_name: Wembe
- first_name: Laura
full_name: Ares, Laura
last_name: Ares
- first_name: Jan
full_name: Sperling, Jan
last_name: Sperling
- first_name: Sina
full_name: Ober-Blöbaum, Sina
last_name: Ober-Blöbaum
citation:
ama: 'Offen C, Wembe B, Ares L, Sperling J, Ober-Blöbaum S. Numerical approaches
to entangling dynamics from variational principles. Journal of Physics A: Mathematical
and Theoretical. Published online 2026. doi:10.1088/1751-8121/ae6d51'
apa: 'Offen, C., Wembe, B., Ares, L., Sperling, J., & Ober-Blöbaum, S. (2026).
Numerical approaches to entangling dynamics from variational principles. Journal
of Physics A: Mathematical and Theoretical. https://doi.org/10.1088/1751-8121/ae6d51'
bibtex: '@article{Offen_Wembe_Ares_Sperling_Ober-Blöbaum_2026, title={Numerical
approaches to entangling dynamics from variational principles}, DOI={10.1088/1751-8121/ae6d51},
journal={Journal of Physics A: Mathematical and Theoretical}, publisher={IOP Publishing},
author={Offen, Christian and Wembe, Boris and Ares, Laura and Sperling, Jan and
Ober-Blöbaum, Sina}, year={2026} }'
chicago: 'Offen, Christian, Boris Wembe, Laura Ares, Jan Sperling, and Sina Ober-Blöbaum.
“Numerical Approaches to Entangling Dynamics from Variational Principles.” Journal
of Physics A: Mathematical and Theoretical, 2026. https://doi.org/10.1088/1751-8121/ae6d51.'
ieee: 'C. Offen, B. Wembe, L. Ares, J. Sperling, and S. Ober-Blöbaum, “Numerical
approaches to entangling dynamics from variational principles,” Journal of
Physics A: Mathematical and Theoretical, 2026, doi: 10.1088/1751-8121/ae6d51.'
mla: 'Offen, Christian, et al. “Numerical Approaches to Entangling Dynamics from
Variational Principles.” Journal of Physics A: Mathematical and Theoretical,
IOP Publishing, 2026, doi:10.1088/1751-8121/ae6d51.'
short: 'C. Offen, B. Wembe, L. Ares, J. Sperling, S. Ober-Blöbaum, Journal of Physics
A: Mathematical and Theoretical (2026).'
date_created: 2026-06-01T09:29:01Z
date_updated: 2026-06-01T09:29:29Z
department:
- _id: '94'
doi: 10.1088/1751-8121/ae6d51
language:
- iso: eng
publication: 'Journal of Physics A: Mathematical and Theoretical'
publication_identifier:
issn:
- 1751-8113
- 1751-8121
publication_status: published
publisher: IOP Publishing
status: public
title: Numerical approaches to entangling dynamics from variational principles
type: journal_article
user_id: '95394'
year: '2026'
...
---
_id: '65746'
abstract:
- lang: eng
text: This paper presents a class of structure-preserving numerical methods for
quantum optimal control problems, based on commutator-free Cayley integrators.
Starting from the Krotov framework, we reformulate the forward and backward propagation
steps using Cayley-type schemes that preserve unitarity and symmetry at the discrete
level. This approach eliminates the need for matrix exponentials and commutators,
leading to significant computational savings while maintaining higher-order accuracy.
We first recall the standard linear setting and then extend the formulation to
nonlinear Schrödinger and Gross-Pitaevskii equations using a Cayley-polynomial
interpolation strategy. Numerical experiments on state-transfer problems illustrate
that the CF-Cayley method achieves the same accuracy as high-order exponential
or Cayley-Magnus schemes at substantially lower cost, especially for longtime
or highly oscillatory dynamics. In the nonlinear regime, the structure-preserving
properties of the method ensure stability and norm conservation, making it a robust
tool for large-scale quantum control simulations. The proposed framework thus
bridges geometric integration and optimal control, offering an efficient and reliable
alternative to existing exponential-based propagators.
author:
- first_name: Boris Edgar
full_name: Wembe Moafo, Boris Edgar
id: '95394'
last_name: Wembe Moafo
orcid: 0000-0002-6085-8071
- first_name: Usman
full_name: Ali, Usman
last_name: Ali
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Sina
full_name: Ober-Blöbaum, Sina
id: '16494'
last_name: Ober-Blöbaum
citation:
ama: 'Wembe Moafo BE, Ali U, Meier T, Ober-Blöbaum S. Cayley Commutator-free Methods
for Krotov-Type Algorithms in Quantum Optimal Control. In: ; 2026. doi:10.48550/ARXIV.2603.11697'
apa: Wembe Moafo, B. E., Ali, U., Meier, T., & Ober-Blöbaum, S. (2026). Cayley
Commutator-free Methods for Krotov-Type Algorithms in Quantum Optimal Control.
European Control Conference, Reykjavík, Iceland. https://doi.org/10.48550/ARXIV.2603.11697
bibtex: '@inproceedings{Wembe Moafo_Ali_Meier_Ober-Blöbaum_2026, title={Cayley Commutator-free
Methods for Krotov-Type Algorithms in Quantum Optimal Control}, DOI={10.48550/ARXIV.2603.11697},
author={Wembe Moafo, Boris Edgar and Ali, Usman and Meier, Torsten and Ober-Blöbaum,
Sina}, year={2026} }'
chicago: Wembe Moafo, Boris Edgar, Usman Ali, Torsten Meier, and Sina Ober-Blöbaum.
“Cayley Commutator-Free Methods for Krotov-Type Algorithms in Quantum Optimal
Control,” 2026. https://doi.org/10.48550/ARXIV.2603.11697.
ieee: 'B. E. Wembe Moafo, U. Ali, T. Meier, and S. Ober-Blöbaum, “Cayley Commutator-free
Methods for Krotov-Type Algorithms in Quantum Optimal Control,” presented at the
European Control Conference, Reykjavík, Iceland, 2026, doi: 10.48550/ARXIV.2603.11697.'
mla: Wembe Moafo, Boris Edgar, et al. Cayley Commutator-Free Methods for Krotov-Type
Algorithms in Quantum Optimal Control. 2026, doi:10.48550/ARXIV.2603.11697.
short: 'B.E. Wembe Moafo, U. Ali, T. Meier, S. Ober-Blöbaum, in: 2026.'
conference:
end_date: 2026-07-10
location: Reykjavík, Iceland
name: European Control Conference
start_date: 2026-07-07
date_created: 2026-06-01T09:38:06Z
date_updated: 2026-06-01T09:40:38Z
department:
- _id: '94'
doi: 10.48550/ARXIV.2603.11697
language:
- iso: eng
status: public
title: Cayley Commutator-free Methods for Krotov-Type Algorithms in Quantum Optimal
Control
type: conference
user_id: '95394'
year: '2026'
...
---
_id: '65744'
abstract:
- lang: eng
text: 'Optimal control problems with symmetries often admit a non stationary turnpike
property called trim turnpike, which characterizes the convergence of optimal
solutions to certain symmetry induced trajectories called trim primitives. In
this paper we establish an exponential trim turnpike property for a class of optimal
control problems with structural properties related to Abelian Lie group symmetries.
The key ingredient of our approach is the introduction of an appropriate reduced
optimal control problem. We show that extremals of the original problem can be
characterized through a reduced Hamiltonian boundary value problem that coincides
with the optimality system of the reduced problem. Under a hyperbolicity assumption
on the equilibrium of the corresponding reduced Hamiltonian system we prove that
optimal trajectories remain exponentially close, up to boundary layers near the
endpoints, to a trim primitive defined by the static reduced problem. The theoretical
results are illustrated on three representative examples: linear and nonlinear
problems with quadratic cost and the Kepler orbital transfer problem.'
author:
- first_name: Sofya
full_name: Maslovskaya, Sofya
id: '87909'
last_name: Maslovskaya
- first_name: Sina
full_name: Ober-Blöbaum, Sina
id: '16494'
last_name: Ober-Blöbaum
- first_name: Boris Edgar
full_name: Wembe Moafo, Boris Edgar
id: '95394'
last_name: Wembe Moafo
orcid: 0000-0002-6085-8071
citation:
ama: Maslovskaya S, Ober-Blöbaum S, Wembe Moafo BE. Non static exponential turnpike
property for optimal control problems with symmetries and boundary conditions.
apa: Maslovskaya, S., Ober-Blöbaum, S., & Wembe Moafo, B. E. (n.d.). Non
static exponential turnpike property for optimal control problems with symmetries
and boundary conditions.
bibtex: '@article{Maslovskaya_Ober-Blöbaum_Wembe Moafo, title={Non static exponential
turnpike property for optimal control problems with symmetries and boundary conditions},
author={Maslovskaya, Sofya and Ober-Blöbaum, Sina and Wembe Moafo, Boris Edgar}
}'
chicago: Maslovskaya, Sofya, Sina Ober-Blöbaum, and Boris Edgar Wembe Moafo. “Non
Static Exponential Turnpike Property for Optimal Control Problems with Symmetries
and Boundary Conditions,” n.d.
ieee: S. Maslovskaya, S. Ober-Blöbaum, and B. E. Wembe Moafo, “Non static exponential
turnpike property for optimal control problems with symmetries and boundary conditions.”
.
mla: Maslovskaya, Sofya, et al. Non Static Exponential Turnpike Property for
Optimal Control Problems with Symmetries and Boundary Conditions.
short: S. Maslovskaya, S. Ober-Blöbaum, B.E. Wembe Moafo, (n.d.).
date_created: 2026-06-01T09:31:15Z
date_updated: 2026-06-01T09:35:13Z
department:
- _id: '94'
language:
- iso: eng
publication_status: submitted
status: public
title: Non static exponential turnpike property for optimal control problems with
symmetries and boundary conditions
type: preprint
user_id: '95394'
year: '2026'
...
---
_id: '65747'
abstract:
- lang: eng
text: 'In this work, we address the numerical identification of entanglement in
dynamical scenarios. To this end, we consider different programs based on the
restriction of the evolution to the set of separable (i.e., non-entangled) states,
together with the discretization of the space of variables for numerical computations.
As a first approach, we apply linear splitting methods to the restricted, continuous
equations of motion derived from variational principles. We utilize an exchange
interaction Hamiltonian to confirm that the numerical and analytical solutions
coincide in the limit of small time steps. The application to different Hamiltonians
shows the wide applicability of the method to detect dynamical entanglement. To
avoid the derivation of analytical solutions for complex dynamics, we consider
variational, numerical integration schemes, introducing a variational discretization
for Lagrangians linear in velocities. Here, we examine and compare two approaches:
one in which the system is discretized before the restriction is applied, and
another in which the restriction precedes the discretization. We find that the
"first-discretize-then-restrict" method becomes numerically unstable, already
for the example of an exchange-interaction Hamiltonian, which can be an important
consideration for the numerical analysis of constrained quantum dynamics. Thereby,
broadly applicable numerical tools, including their limitations, for studying
entanglement over time are established for assessing the entangling power of processes
that are used in quantum information theory.'
article_type: original
author:
- first_name: Christian
full_name: Offen, Christian
last_name: Offen
- first_name: Boris
full_name: Wembe, Boris
last_name: Wembe
- first_name: Laura
full_name: Ares, Laura
last_name: Ares
- first_name: Jan
full_name: Sperling, Jan
last_name: Sperling
- first_name: Sina
full_name: Ober-Blöbaum, Sina
last_name: Ober-Blöbaum
citation:
ama: 'Offen C, Wembe B, Ares L, Sperling J, Ober-Blöbaum S. Numerical approaches
to entangling dynamics from variational principles. Journal of Physics A: Mathematical
and Theoretical. Published online 2026. doi:10.1088/1751-8121/ae6d51'
apa: 'Offen, C., Wembe, B., Ares, L., Sperling, J., & Ober-Blöbaum, S. (2026).
Numerical approaches to entangling dynamics from variational principles. Journal
of Physics A: Mathematical and Theoretical. https://doi.org/10.1088/1751-8121/ae6d51'
bibtex: '@article{Offen_Wembe_Ares_Sperling_Ober-Blöbaum_2026, title={Numerical
approaches to entangling dynamics from variational principles}, DOI={10.1088/1751-8121/ae6d51},
journal={Journal of Physics A: Mathematical and Theoretical}, publisher={IOP Publishing},
author={Offen, Christian and Wembe, Boris and Ares, Laura and Sperling, Jan and
Ober-Blöbaum, Sina}, year={2026} }'
chicago: 'Offen, Christian, Boris Wembe, Laura Ares, Jan Sperling, and Sina Ober-Blöbaum.
“Numerical Approaches to Entangling Dynamics from Variational Principles.” Journal
of Physics A: Mathematical and Theoretical, 2026. https://doi.org/10.1088/1751-8121/ae6d51.'
ieee: 'C. Offen, B. Wembe, L. Ares, J. Sperling, and S. Ober-Blöbaum, “Numerical
approaches to entangling dynamics from variational principles,” Journal of
Physics A: Mathematical and Theoretical, 2026, doi: 10.1088/1751-8121/ae6d51.'
mla: 'Offen, Christian, et al. “Numerical Approaches to Entangling Dynamics from
Variational Principles.” Journal of Physics A: Mathematical and Theoretical,
IOP Publishing, 2026, doi:10.1088/1751-8121/ae6d51.'
short: 'C. Offen, B. Wembe, L. Ares, J. Sperling, S. Ober-Blöbaum, Journal of Physics
A: Mathematical and Theoretical (2026).'
date_created: 2026-06-01T09:41:19Z
date_updated: 2026-06-01T09:43:52Z
department:
- _id: '94'
doi: 10.1088/1751-8121/ae6d51
language:
- iso: eng
publication: 'Journal of Physics A: Mathematical and Theoretical'
publication_identifier:
issn:
- 1751-8113
- 1751-8121
publication_status: published
publisher: IOP Publishing
status: public
title: Numerical approaches to entangling dynamics from variational principles
type: journal_article
user_id: '95394'
year: '2026'
...