---
_id: '63495'
abstract:
- lang: eng
text: "Inhalt Der Leitfaden der Wissenschaftlichen Gesellschaft für Produktentwicklung
(WiGeP) dient als umfassende Orientierung für die Gestaltung der universitären
Lehre im Bereich der Produktentwicklung. Er wurde überarbeitet, um aktuellen gesellschaftlichen
Herausforderungen wie dem Klimawandel, sinkenden Studierendenzahlen und abnehmenden
technischen Vorkenntnissen zu begegnen. Ein zentrales Anliegen ist es, Ingenieurinnen
und Ingenieure zu befähigen, aktiv zur Lösung globaler Probleme beizutragen. Didaktisch
wird der Einsatz moderner Lehrmethoden wie Projektarbeit, Flipped-Classroom, digitale
Tools, VR-Lernen sowie adäquater Prüfungsformate nach Taxonomiestufen empfohlen.
Inhaltlich stehen Maschinenelemente, methodische und virtuelle Produktentwicklung
im Fokus, ergänzt durch interdisziplinäre Themen wie Nachhaltigkeit, Digitalisierung
und Technikethik. Zudem wird die Bedeutung technischer Bildung an allgemeinbildenden
Schulen hervorgehoben, um die Studierfähigkeit und Begeisterung für Technik frühzeitig
zu fördern.\r\nDer Leitfaden richtet sich an Lehrende an Hochschulen, Hochschuldidaktiker,
Studiengangverantwortliche sowie bildungspolitische Entscheidungsträger und interessierte
Akteure aus Gesellschaft und Industrie. Insgesamt versteht sich der Leitfaden
als strategisches und operatives Werkzeug zur Weiterentwicklung der ingenieurwissenschaftlichen
Lehre mit dem Ziel, exzellent ausgebildete und gesellschaftlich verantwortungsbewusste
Produktentwicklerinnen und Produktentwickler für die Zukunft zu qualifizieren."
author:
- first_name: Beate
full_name: Bender, Beate
last_name: Bender
- first_name: Stephan
full_name: Husung, Stephan
last_name: Husung
- first_name: Eckhard
full_name: Kirchner, Eckhard
last_name: Kirchner
- first_name: Ulf
full_name: Kletzin, Ulf
last_name: Kletzin
- first_name: Frederike
full_name: Kossack, Frederike
last_name: Kossack
- first_name: Armin
full_name: Lohrengel, Armin
last_name: Lohrengel
- first_name: Balázs
full_name: Magyar, Balázs
id: '97759'
last_name: Magyar
- first_name: Oliver
full_name: Riedel, Oliver
last_name: Riedel
- first_name: Karsten
full_name: Stahl, Karsten
last_name: Stahl
citation:
ama: Bender B, Husung S, Kirchner E, et al. Universitäre Lehre in der Produktentwicklung/Academic
teaching in product development. Konstruktion. 2025;77(10):54-65. doi:10.37544/0720-5953-2025-10-54
apa: Bender, B., Husung, S., Kirchner, E., Kletzin, U., Kossack, F., Lohrengel,
A., Magyar, B., Riedel, O., & Stahl, K. (2025). Universitäre Lehre in der
Produktentwicklung/Academic teaching in product development. Konstruktion,
77(10), 54–65. https://doi.org/10.37544/0720-5953-2025-10-54
bibtex: '@article{Bender_Husung_Kirchner_Kletzin_Kossack_Lohrengel_Magyar_Riedel_Stahl_2025,
title={Universitäre Lehre in der Produktentwicklung/Academic teaching in product
development}, volume={77}, DOI={10.37544/0720-5953-2025-10-54},
number={10}, journal={Konstruktion}, publisher={VDI Fachmedien GmbH and Co. KG},
author={Bender, Beate and Husung, Stephan and Kirchner, Eckhard and Kletzin, Ulf
and Kossack, Frederike and Lohrengel, Armin and Magyar, Balázs and Riedel, Oliver
and Stahl, Karsten}, year={2025}, pages={54–65} }'
chicago: 'Bender, Beate, Stephan Husung, Eckhard Kirchner, Ulf Kletzin, Frederike
Kossack, Armin Lohrengel, Balázs Magyar, Oliver Riedel, and Karsten Stahl. “Universitäre
Lehre in Der Produktentwicklung/Academic Teaching in Product Development.” Konstruktion
77, no. 10 (2025): 54–65. https://doi.org/10.37544/0720-5953-2025-10-54.'
ieee: 'B. Bender et al., “Universitäre Lehre in der Produktentwicklung/Academic
teaching in product development,” Konstruktion, vol. 77, no. 10, pp. 54–65,
2025, doi: 10.37544/0720-5953-2025-10-54.'
mla: Bender, Beate, et al. “Universitäre Lehre in Der Produktentwicklung/Academic
Teaching in Product Development.” Konstruktion, vol. 77, no. 10, VDI Fachmedien
GmbH and Co. KG, 2025, pp. 54–65, doi:10.37544/0720-5953-2025-10-54.
short: B. Bender, S. Husung, E. Kirchner, U. Kletzin, F. Kossack, A. Lohrengel,
B. Magyar, O. Riedel, K. Stahl, Konstruktion 77 (2025) 54–65.
date_created: 2026-01-06T08:00:48Z
date_updated: 2026-01-06T08:08:34Z
doi: 10.37544/0720-5953-2025-10-54
intvolume: ' 77'
issue: '10'
language:
- iso: eng
page: 54-65
publication: Konstruktion
publication_identifier:
issn:
- 0720-5953
publication_status: published
publisher: VDI Fachmedien GmbH and Co. KG
status: public
title: Universitäre Lehre in der Produktentwicklung/Academic teaching in product development
type: journal_article
user_id: '97759'
volume: 77
year: '2025'
...
---
_id: '59056'
author:
- first_name: Karl
full_name: Seeger, Karl
last_name: Seeger
- first_name: Matteo
full_name: Genovese, Matteo
last_name: Genovese
- first_name: Alexander
full_name: Schlüter, Alexander
id: '103302'
last_name: Schlüter
orcid: 0000-0002-2569-1624
- first_name: Christina
full_name: Kockel, Christina
last_name: Kockel
- first_name: Orlando
full_name: Corigliano, Orlando
last_name: Corigliano
- first_name: Edith Benjamina
full_name: Díaz Canales, Edith Benjamina
id: '105704'
last_name: Díaz Canales
orcid: 0009-0007-2748-0074
- first_name: Aaron
full_name: Praktiknjo, Aaron
last_name: Praktiknjo
- first_name: Petronilla
full_name: Fragiacomo, Petronilla
last_name: Fragiacomo
citation:
ama: 'Seeger K, Genovese M, Schlüter A, et al. Techno-economic analysis of hydrogen
and green fuels supply scenarios assessing three import routes: Canada, Chile,
and Algeria to Germany. International Journal of Hydrogen Energy. 2025;116:558-576.
doi:10.1016/j.ijhydene.2025.02.379'
apa: 'Seeger, K., Genovese, M., Schlüter, A., Kockel, C., Corigliano, O., Díaz Canales,
E. B., Praktiknjo, A., & Fragiacomo, P. (2025). Techno-economic analysis of
hydrogen and green fuels supply scenarios assessing three import routes: Canada,
Chile, and Algeria to Germany. International Journal of Hydrogen Energy,
116, 558–576. https://doi.org/10.1016/j.ijhydene.2025.02.379'
bibtex: '@article{Seeger_Genovese_Schlüter_Kockel_Corigliano_Díaz Canales_Praktiknjo_Fragiacomo_2025,
title={Techno-economic analysis of hydrogen and green fuels supply scenarios assessing
three import routes: Canada, Chile, and Algeria to Germany}, volume={116}, DOI={10.1016/j.ijhydene.2025.02.379},
journal={International Journal of Hydrogen Energy}, publisher={Elsevier BV}, author={Seeger,
Karl and Genovese, Matteo and Schlüter, Alexander and Kockel, Christina and Corigliano,
Orlando and Díaz Canales, Edith Benjamina and Praktiknjo, Aaron and Fragiacomo,
Petronilla}, year={2025}, pages={558–576} }'
chicago: 'Seeger, Karl, Matteo Genovese, Alexander Schlüter, Christina Kockel, Orlando
Corigliano, Edith Benjamina Díaz Canales, Aaron Praktiknjo, and Petronilla Fragiacomo.
“Techno-Economic Analysis of Hydrogen and Green Fuels Supply Scenarios Assessing
Three Import Routes: Canada, Chile, and Algeria to Germany.” International
Journal of Hydrogen Energy 116 (2025): 558–76. https://doi.org/10.1016/j.ijhydene.2025.02.379.'
ieee: 'K. Seeger et al., “Techno-economic analysis of hydrogen and green
fuels supply scenarios assessing three import routes: Canada, Chile, and Algeria
to Germany,” International Journal of Hydrogen Energy, vol. 116, pp. 558–576,
2025, doi: 10.1016/j.ijhydene.2025.02.379.'
mla: 'Seeger, Karl, et al. “Techno-Economic Analysis of Hydrogen and Green Fuels
Supply Scenarios Assessing Three Import Routes: Canada, Chile, and Algeria to
Germany.” International Journal of Hydrogen Energy, vol. 116, Elsevier
BV, 2025, pp. 558–76, doi:10.1016/j.ijhydene.2025.02.379.'
short: K. Seeger, M. Genovese, A. Schlüter, C. Kockel, O. Corigliano, E.B. Díaz
Canales, A. Praktiknjo, P. Fragiacomo, International Journal of Hydrogen Energy
116 (2025) 558–576.
date_created: 2025-03-18T08:57:46Z
date_updated: 2026-01-06T08:01:01Z
department:
- _id: '876'
- _id: '9'
- _id: '393'
- _id: '321'
doi: 10.1016/j.ijhydene.2025.02.379
intvolume: ' 116'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/j.ijhydene.2025.02.379
oa: '1'
page: 558-576
publication: International Journal of Hydrogen Energy
publication_identifier:
issn:
- 0360-3199
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: 'Techno-economic analysis of hydrogen and green fuels supply scenarios assessing
three import routes: Canada, Chile, and Algeria to Germany'
type: journal_article
user_id: '103302'
volume: 116
year: '2025'
...
---
_id: '63498'
author:
- first_name: Wilhelm
full_name: Kirchgässner, Wilhelm
last_name: Kirchgässner
- first_name: Nikolas
full_name: Förster, Nikolas
last_name: Förster
- first_name: Till
full_name: Piepenbrock, Till
last_name: Piepenbrock
- first_name: Oliver
full_name: Schweins, Oliver
last_name: Schweins
- first_name: Oliver
full_name: Wallscheid, Oliver
last_name: Wallscheid
citation:
ama: 'Kirchgässner W, Förster N, Piepenbrock T, Schweins O, Wallscheid O. HARDCORE:
H-Field and Power Loss Estimation for Arbitrary Waveforms With Residual, Dilated
Convolutional Neural Networks in Ferrite Cores. IEEE Transactions on Power
Electronics. 2025;40(2):3326-3335. doi:10.1109/TPEL.2024.3488174'
apa: 'Kirchgässner, W., Förster, N., Piepenbrock, T., Schweins, O., & Wallscheid,
O. (2025). HARDCORE: H-Field and Power Loss Estimation for Arbitrary Waveforms
With Residual, Dilated Convolutional Neural Networks in Ferrite Cores. IEEE
Transactions on Power Electronics, 40(2), 3326–3335. https://doi.org/10.1109/TPEL.2024.3488174'
bibtex: '@article{Kirchgässner_Förster_Piepenbrock_Schweins_Wallscheid_2025, title={HARDCORE:
H-Field and Power Loss Estimation for Arbitrary Waveforms With Residual, Dilated
Convolutional Neural Networks in Ferrite Cores}, volume={40}, DOI={10.1109/TPEL.2024.3488174},
number={2}, journal={IEEE Transactions on Power Electronics}, author={Kirchgässner,
Wilhelm and Förster, Nikolas and Piepenbrock, Till and Schweins, Oliver and Wallscheid,
Oliver}, year={2025}, pages={3326–3335} }'
chicago: 'Kirchgässner, Wilhelm, Nikolas Förster, Till Piepenbrock, Oliver Schweins,
and Oliver Wallscheid. “HARDCORE: H-Field and Power Loss Estimation for Arbitrary
Waveforms With Residual, Dilated Convolutional Neural Networks in Ferrite Cores.”
IEEE Transactions on Power Electronics 40, no. 2 (2025): 3326–35. https://doi.org/10.1109/TPEL.2024.3488174.'
ieee: 'W. Kirchgässner, N. Förster, T. Piepenbrock, O. Schweins, and O. Wallscheid,
“HARDCORE: H-Field and Power Loss Estimation for Arbitrary Waveforms With Residual,
Dilated Convolutional Neural Networks in Ferrite Cores,” IEEE Transactions
on Power Electronics, vol. 40, no. 2, pp. 3326–3335, 2025, doi: 10.1109/TPEL.2024.3488174.'
mla: 'Kirchgässner, Wilhelm, et al. “HARDCORE: H-Field and Power Loss Estimation
for Arbitrary Waveforms With Residual, Dilated Convolutional Neural Networks in
Ferrite Cores.” IEEE Transactions on Power Electronics, vol. 40, no. 2,
2025, pp. 3326–35, doi:10.1109/TPEL.2024.3488174.'
short: W. Kirchgässner, N. Förster, T. Piepenbrock, O. Schweins, O. Wallscheid,
IEEE Transactions on Power Electronics 40 (2025) 3326–3335.
date_created: 2026-01-06T08:07:13Z
date_updated: 2026-01-06T08:08:01Z
department:
- _id: '52'
doi: 10.1109/TPEL.2024.3488174
intvolume: ' 40'
issue: '2'
keyword:
- Mathematical models
- Estimation
- Data models
- Convolutional neural networks
- Accuracy
- Magnetic hysteresis
- Magnetic cores
- Temperature measurement
- Magnetic domains
- Temperature distribution
- Convolutional neural network (CNN)
- machine learning (ML)
- magnetics
page: 3326-3335
publication: IEEE Transactions on Power Electronics
status: public
title: 'HARDCORE: H-Field and Power Loss Estimation for Arbitrary Waveforms With Residual,
Dilated Convolutional Neural Networks in Ferrite Cores'
type: journal_article
user_id: '83383'
volume: 40
year: '2025'
...
---
_id: '63496'
author:
- first_name: Nikolas
full_name: Foerster, Nikolas
last_name: Foerster
- first_name: Daniel
full_name: Urbaneck, Daniel
last_name: Urbaneck
- first_name: Maximilian
full_name: Schenke, Maximilian
last_name: Schenke
- first_name: Anastacia
full_name: Ebers, Anastacia
last_name: Ebers
- first_name: Nicolas
full_name: Schoenlau, Nicolas
last_name: Schoenlau
- first_name: Oliver
full_name: Wallscheid, Oliver
last_name: Wallscheid
- first_name: Frank
full_name: Schafmeister, Frank
last_name: Schafmeister
citation:
ama: 'Foerster N, Urbaneck D, Schenke M, et al. Improving the Usability of Calorimetric
Measuring Chambers for Reliable Thermal Measurements. In: PCIM Conference 2025;
International Exhibition and Conference for Power Electronics, Intelligent Motion,
Renewable Energy and Energy Management. ; 2025:2881-2890. doi:10.30420/566541386'
apa: Foerster, N., Urbaneck, D., Schenke, M., Ebers, A., Schoenlau, N., Wallscheid,
O., & Schafmeister, F. (2025). Improving the Usability of Calorimetric Measuring
Chambers for Reliable Thermal Measurements. PCIM Conference 2025; International
Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable
Energy and Energy Management, 2881–2890. https://doi.org/10.30420/566541386
bibtex: '@inproceedings{Foerster_Urbaneck_Schenke_Ebers_Schoenlau_Wallscheid_Schafmeister_2025,
title={Improving the Usability of Calorimetric Measuring Chambers for Reliable
Thermal Measurements}, DOI={10.30420/566541386},
booktitle={PCIM Conference 2025; International Exhibition and Conference for Power
Electronics, Intelligent Motion, Renewable Energy and Energy Management}, author={Foerster,
Nikolas and Urbaneck, Daniel and Schenke, Maximilian and Ebers, Anastacia and
Schoenlau, Nicolas and Wallscheid, Oliver and Schafmeister, Frank}, year={2025},
pages={2881–2890} }'
chicago: Foerster, Nikolas, Daniel Urbaneck, Maximilian Schenke, Anastacia Ebers,
Nicolas Schoenlau, Oliver Wallscheid, and Frank Schafmeister. “Improving the Usability
of Calorimetric Measuring Chambers for Reliable Thermal Measurements.” In PCIM
Conference 2025; International Exhibition and Conference for Power Electronics,
Intelligent Motion, Renewable Energy and Energy Management, 2881–90, 2025.
https://doi.org/10.30420/566541386.
ieee: 'N. Foerster et al., “Improving the Usability of Calorimetric Measuring
Chambers for Reliable Thermal Measurements,” in PCIM Conference 2025; International
Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable
Energy and Energy Management, 2025, pp. 2881–2890, doi: 10.30420/566541386.'
mla: Foerster, Nikolas, et al. “Improving the Usability of Calorimetric Measuring
Chambers for Reliable Thermal Measurements.” PCIM Conference 2025; International
Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable
Energy and Energy Management, 2025, pp. 2881–90, doi:10.30420/566541386.
short: 'N. Foerster, D. Urbaneck, M. Schenke, A. Ebers, N. Schoenlau, O. Wallscheid,
F. Schafmeister, in: PCIM Conference 2025; International Exhibition and Conference
for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management,
2025, pp. 2881–2890.'
date_created: 2026-01-06T08:04:10Z
date_updated: 2026-01-06T08:05:25Z
department:
- _id: '52'
doi: 10.30420/566541386
language:
- iso: eng
page: 2881-2890
publication: PCIM Conference 2025; International Exhibition and Conference for Power
Electronics, Intelligent Motion, Renewable Energy and Energy Management
status: public
title: Improving the Usability of Calorimetric Measuring Chambers for Reliable Thermal
Measurements
type: conference
user_id: '83383'
year: '2025'
...
---
_id: '60837'
abstract:
- lang: eng
text: "In light of growing demands for resource efficiency and sustainability in
vehicle engineering, the environmentally compatible separation of structural adhesive
joints is gaining increasing relevance. This study presents a comparative analysis
of two physically based debonding methods: the established hot-air process and
a cryogenic cold process based on liquid nitrogen (LN2). The primary objective
is to assess the ecological impact and process-related sustainability of both
approaches.\r\nExperimental investigations were conducted on a component-representative
triple-sheet structure that simulates common automotive flange joints. Thermal
input was applied either by convective heating using a hot air gun or by direct
cooling through a contact-based LN2 tool. The resulting temperature profiles were
recorded using spatially distributed thermocouples. Subsequently, the outer panel
was selectively debonded to replicate a repair scenario, and the mechanical integrity
of the remaining adhesive joint was evaluated through Mode I testing of L-shaped
specimens. Process data served as input for an Life Cycle Assessment (LCA) according
to DIN EN ISO 14040.\r\nThe cryogenic method achieved a 40% reduction in carbon
footprint compared to the hot-air process (0.337 kg vs. 0.559 kg CO2-equivalents),
primarily due to its shorter process time and more efficient heat transfer. While
the hot-air method’s impact is mainly driven by electrical energy use, that of
the cold method stems from cryogenic media consumption. Notwithstanding certain
disadvantages in specific impact categories, the LN2-based process exhibits a
superior overall ecological performance and signifies a promising solution for
repair- and recycling-oriented adhesive separation in structural vehicle applications."
article_number: '100332'
article_type: original
author:
- first_name: Alex
full_name: Jordan, Alex
id: '62451'
last_name: Jordan
orcid: 0009-0007-9546-6071
- first_name: Lucas
full_name: Hermelingmeier, Lucas
id: '58649'
last_name: Hermelingmeier
- first_name: Julian
full_name: Gilich, Julian
id: '44391'
last_name: Gilich
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
- first_name: Marco Sebastian
full_name: De Santis, Marco Sebastian
id: '52239'
last_name: De Santis
- first_name: Alexander
full_name: Schlüter, Alexander
id: '103302'
last_name: Schlüter
orcid: 0000-0002-2569-1624
citation:
ama: Jordan A, Hermelingmeier L, Gilich J, Meschut G, De Santis MS, Schlüter A.
Comparison of the economic efficiency and sustainability of two debonding processes
for structurally bonded sills. Journal of Advanced Joining Processes. 2025;12.
doi:10.1016/j.jajp.2025.100332
apa: Jordan, A., Hermelingmeier, L., Gilich, J., Meschut, G., De Santis, M. S.,
& Schlüter, A. (2025). Comparison of the economic efficiency and sustainability
of two debonding processes for structurally bonded sills. Journal of Advanced
Joining Processes, 12, Article 100332. https://doi.org/10.1016/j.jajp.2025.100332
bibtex: '@article{Jordan_Hermelingmeier_Gilich_Meschut_De Santis_Schlüter_2025,
title={Comparison of the economic efficiency and sustainability of two debonding
processes for structurally bonded sills}, volume={12}, DOI={10.1016/j.jajp.2025.100332},
number={100332}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier},
author={Jordan, Alex and Hermelingmeier, Lucas and Gilich, Julian and Meschut,
Gerson and De Santis, Marco Sebastian and Schlüter, Alexander}, year={2025} }'
chicago: Jordan, Alex, Lucas Hermelingmeier, Julian Gilich, Gerson Meschut, Marco
Sebastian De Santis, and Alexander Schlüter. “Comparison of the Economic Efficiency
and Sustainability of Two Debonding Processes for Structurally Bonded Sills.”
Journal of Advanced Joining Processes 12 (2025). https://doi.org/10.1016/j.jajp.2025.100332.
ieee: 'A. Jordan, L. Hermelingmeier, J. Gilich, G. Meschut, M. S. De Santis, and
A. Schlüter, “Comparison of the economic efficiency and sustainability of two
debonding processes for structurally bonded sills,” Journal of Advanced Joining
Processes, vol. 12, Art. no. 100332, 2025, doi: 10.1016/j.jajp.2025.100332.'
mla: Jordan, Alex, et al. “Comparison of the Economic Efficiency and Sustainability
of Two Debonding Processes for Structurally Bonded Sills.” Journal of Advanced
Joining Processes, vol. 12, 100332, Elsevier, 2025, doi:10.1016/j.jajp.2025.100332.
short: A. Jordan, L. Hermelingmeier, J. Gilich, G. Meschut, M.S. De Santis, A. Schlüter,
Journal of Advanced Joining Processes 12 (2025).
date_created: 2025-07-30T11:04:28Z
date_updated: 2026-01-06T08:22:54Z
department:
- _id: '157'
- _id: '876'
- _id: '321'
- _id: '9'
doi: 10.1016/j.jajp.2025.100332
intvolume: ' 12'
keyword:
- Sustainable debonding
- Structural adhesives
- Sustainable joining technologies
- Life Cycle Assessment (LCA)
- Automotive repair process
- Economically efficient debonding
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/S2666330925000536?via%3Dihub
oa: '1'
publication: Journal of Advanced Joining Processes
publication_identifier:
issn:
- 2666-3309
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: Comparison of the economic efficiency and sustainability of two debonding processes
for structurally bonded sills
type: journal_article
user_id: '103302'
volume: 12
year: '2025'
...
---
_id: '63209'
abstract:
- lang: ger
text: 'Die DFG-Projekte AddFeRo-PM (406108415) und AddFeRo-SR (465089065) untersuchten
die Potenziale des LB-PBF/M-Verfahrens zur Herstellung von Rotoren für unterschiedliche
elektrische Maschinen. Im interdisziplinären Ansatz wurden Materialentwicklung
und mechanische sowie elektromagnetische Optimierung verbunden. Im Projekt „AddFeRo-PM“
wurde der Rotor einer permanentmagneterregten Synchron- maschine (PMSM) untersucht.
FeSi erwies sich als geeignete Legierung, konnte aber wegen Spannungsrissen nur
bis zu 3 % Siliziumanteil (kurz: FeSi3) verarbeitet werden. Mechanische und elektromagnetische
Untersuchungen ermöglichten eine 3D-Optimierung der Rotorgeometrie und -struktur.
Der Demonstrator wurde additiv gefertigt und zeigt Leicht-baupotenziale sowie
reduzierte Drehmomentwelligkeit. Im Folgeprojekt „AddFeRo-SR“ kam eine Hochtemperatur-Bauraumheizung
(HTBH) zum Einsatz, die FeSi mit 6,5 % Siliziumanteil verarbeitbar machte, welches
bessere elektro- magnetische Eigenschaften bietet. Sie wurde bei einer Synchron-Reluktanzmaschine
(SynRM) getestet. Eine hybride Rotorfertigung erwies sich jedoch aufgrund von
HTBH-Einschränkungen als ungeeignet, weshalb eine einteilige Fertigung mit FeSi3
umgesetzt wurde. Experimente bestätigten vergleichbare Betriebsergebnisse zur
konventionellen Fertigung bei reduzierter Rotormasse. Zusätzlich wurde eine Methodik
entwickelt, um additive Verfahren als Ergänzung zur konventionellen Fertigung
zu integrieren. Beide Projekte zeigen das Potenzial additiver Fertigung für Leichtbau
und Wirkungsgradsteigerung im Elektromaschinenbau und bieten wertvolle Grundlagen
für industrielle Anwendungen.'
author:
- first_name: Michael
full_name: Haase, Michael
id: '35970'
last_name: Haase
- first_name: Marius
full_name: Behrendt, Marius
last_name: Behrendt
- first_name: Florian
full_name: Hengsbach, Florian
id: '14073'
last_name: Hengsbach
- first_name: Vinay
full_name: Kunnathully Sathees Kumar, Vinay
id: '60979'
last_name: Kunnathully Sathees Kumar
- first_name: Sebastian
full_name: Magerkohl, Sebastian
id: '28520'
last_name: Magerkohl
- first_name: Balázs
full_name: Magyar, Balázs
id: '97759'
last_name: Magyar
- first_name: Bernd
full_name: Ponick, Bernd
last_name: Ponick
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
- first_name: Detmar
full_name: Zimmer, Detmar
id: '604'
last_name: Zimmer
citation:
ama: 'Haase M, Behrendt M, Hengsbach F, et al. Additive Fertigung im Elektromaschinenbau:
Erforschung von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter
Synchronmaschinen. Technische Informationsbibliothek; 2025. doi:10.34657/26753'
apa: 'Haase, M., Behrendt, M., Hengsbach, F., Kunnathully Sathees Kumar, V., Magerkohl,
S., Magyar, B., Ponick, B., Schaper, M., & Zimmer, D. (2025). Additive
Fertigung im Elektromaschinenbau: Erforschung von Potentialen der additiven Fertigung
in Rotoren permanentmagneterregter Synchronmaschinen. Technische Informationsbibliothek.
https://doi.org/10.34657/26753'
bibtex: '@book{Haase_Behrendt_Hengsbach_Kunnathully Sathees Kumar_Magerkohl_Magyar_Ponick_Schaper_Zimmer_2025,
place={Hannover}, title={Additive Fertigung im Elektromaschinenbau: Erforschung
von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen},
DOI={10.34657/26753}, publisher={Technische
Informationsbibliothek}, author={Haase, Michael and Behrendt, Marius and Hengsbach,
Florian and Kunnathully Sathees Kumar, Vinay and Magerkohl, Sebastian and Magyar,
Balázs and Ponick, Bernd and Schaper, Mirko and Zimmer, Detmar}, year={2025} }'
chicago: 'Haase, Michael, Marius Behrendt, Florian Hengsbach, Vinay Kunnathully
Sathees Kumar, Sebastian Magerkohl, Balázs Magyar, Bernd Ponick, Mirko Schaper,
and Detmar Zimmer. Additive Fertigung im Elektromaschinenbau: Erforschung von
Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen.
Hannover: Technische Informationsbibliothek, 2025. https://doi.org/10.34657/26753.'
ieee: 'M. Haase et al., Additive Fertigung im Elektromaschinenbau: Erforschung
von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen.
Hannover: Technische Informationsbibliothek, 2025.'
mla: 'Haase, Michael, et al. Additive Fertigung im Elektromaschinenbau: Erforschung
von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen.
Technische Informationsbibliothek, 2025, doi:10.34657/26753.'
short: 'M. Haase, M. Behrendt, F. Hengsbach, V. Kunnathully Sathees Kumar, S. Magerkohl,
B. Magyar, B. Ponick, M. Schaper, D. Zimmer, Additive Fertigung im Elektromaschinenbau:
Erforschung von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter
Synchronmaschinen, Technische Informationsbibliothek, Hannover, 2025.'
date_created: 2025-12-18T12:14:12Z
date_updated: 2026-01-06T08:09:33Z
department:
- _id: '146'
- _id: '158'
doi: 10.34657/26753
has_accepted_license: '1'
keyword:
- Additive Fertigung
- Elektromotor
- Leichtbau
- Synchronmotor
- DFG
language:
- iso: ger
main_file_link:
- open_access: '1'
url: https://oa.tib.eu/renate/bitstreams/9121e5bb-d113-4cfe-8fc6-610465afcd66/download
oa: '1'
place: Hannover
publication_status: published
publisher: Technische Informationsbibliothek
status: public
title: 'Additive Fertigung im Elektromaschinenbau: Erforschung von Potentialen der
additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen'
type: report
user_id: '97759'
year: '2025'
...
---
_id: '60681'
article_type: original
author:
- first_name: Edith Benjamina
full_name: Díaz Canales, Edith Benjamina
id: '105704'
last_name: Díaz Canales
orcid: 0009-0007-2748-0074
- first_name: Alfredo
full_name: Avila Galarza, Alfredo
last_name: Avila Galarza
- first_name: Sabine
full_name: Schlüter, Sabine
last_name: Schlüter
- first_name: Erick
full_name: Lacayo Escobar, Erick
last_name: Lacayo Escobar
- first_name: Alexander
full_name: Schlüter, Alexander
id: '103302'
last_name: Schlüter
orcid: 0000-0002-2569-1624
citation:
ama: 'Díaz Canales EB, Avila Galarza A, Schlüter S, Lacayo Escobar E, Schlüter A.
Implementing Strategic Environmental Assessment in the Global South, a Challenge:
Nicaragua as a Case Study. Journal of Sustainable Development Indicators.
2025;1(2):1-26. doi:10.13044/j.sdi.d2.0592'
apa: 'Díaz Canales, E. B., Avila Galarza, A., Schlüter, S., Lacayo Escobar, E.,
& Schlüter, A. (2025). Implementing Strategic Environmental Assessment in
the Global South, a Challenge: Nicaragua as a Case Study. Journal of Sustainable
Development Indicators, 1(2), 1–26. https://doi.org/10.13044/j.sdi.d2.0592'
bibtex: '@article{Díaz Canales_Avila Galarza_Schlüter_Lacayo Escobar_Schlüter_2025,
title={Implementing Strategic Environmental Assessment in the Global South, a
Challenge: Nicaragua as a Case Study}, volume={1}, DOI={10.13044/j.sdi.d2.0592},
number={2}, journal={Journal of Sustainable Development Indicators}, publisher={SDEWES
Centre}, author={Díaz Canales, Edith Benjamina and Avila Galarza, Alfredo and
Schlüter, Sabine and Lacayo Escobar, Erick and Schlüter, Alexander}, year={2025},
pages={1–26} }'
chicago: 'Díaz Canales, Edith Benjamina, Alfredo Avila Galarza, Sabine Schlüter,
Erick Lacayo Escobar, and Alexander Schlüter. “Implementing Strategic Environmental
Assessment in the Global South, a Challenge: Nicaragua as a Case Study.” Journal
of Sustainable Development Indicators 1, no. 2 (2025): 1–26. https://doi.org/10.13044/j.sdi.d2.0592.'
ieee: 'E. B. Díaz Canales, A. Avila Galarza, S. Schlüter, E. Lacayo Escobar, and
A. Schlüter, “Implementing Strategic Environmental Assessment in the Global South,
a Challenge: Nicaragua as a Case Study,” Journal of Sustainable Development
Indicators, vol. 1, no. 2, pp. 1–26, 2025, doi: 10.13044/j.sdi.d2.0592.'
mla: 'Díaz Canales, Edith Benjamina, et al. “Implementing Strategic Environmental
Assessment in the Global South, a Challenge: Nicaragua as a Case Study.” Journal
of Sustainable Development Indicators, vol. 1, no. 2, SDEWES Centre, 2025,
pp. 1–26, doi:10.13044/j.sdi.d2.0592.'
short: E.B. Díaz Canales, A. Avila Galarza, S. Schlüter, E. Lacayo Escobar, A. Schlüter,
Journal of Sustainable Development Indicators 1 (2025) 1–26.
date_created: 2025-07-21T09:04:07Z
date_updated: 2026-01-06T08:13:25Z
department:
- _id: '9'
- _id: '876'
- _id: '321'
- _id: '393'
doi: 10.13044/j.sdi.d2.0592
intvolume: ' 1'
issue: '2'
language:
- iso: eng
page: 1-26
publication: Journal of Sustainable Development Indicators
publication_identifier:
issn:
- 3044-5221
publication_status: published
publisher: SDEWES Centre
quality_controlled: '1'
status: public
title: 'Implementing Strategic Environmental Assessment in the Global South, a Challenge:
Nicaragua as a Case Study'
type: journal_article
user_id: '103302'
volume: 1
year: '2025'
...
---
_id: '59841'
author:
- first_name: Matteo
full_name: Genovese, Matteo
last_name: Genovese
- first_name: Francesco
full_name: Piraino, Francesco
last_name: Piraino
- first_name: Orlando
full_name: Corigliano, Orlando
last_name: Corigliano
- first_name: Alexander
full_name: Schlüter, Alexander
id: '103302'
last_name: Schlüter
orcid: 0000-0002-2569-1624
- first_name: Eugenio
full_name: Scionti, Eugenio
last_name: Scionti
- first_name: Petronilla
full_name: Fragiacomo, Petronilla
last_name: Fragiacomo
citation:
ama: 'Genovese M, Piraino F, Corigliano O, Schlüter A, Scionti E, Fragiacomo P.
Hydrogen economy development in the European Union. In: Accelerating the Transition
to a Hydrogen Economy. Elsevier; 2025. doi:10.1016/b978-0-443-24002-7.00005-7'
apa: Genovese, M., Piraino, F., Corigliano, O., Schlüter, A., Scionti, E., &
Fragiacomo, P. (2025). Hydrogen economy development in the European Union. In
Accelerating the Transition to a Hydrogen Economy. Elsevier. https://doi.org/10.1016/b978-0-443-24002-7.00005-7
bibtex: '@inbook{Genovese_Piraino_Corigliano_Schlüter_Scionti_Fragiacomo_2025, title={Hydrogen
economy development in the European Union}, DOI={10.1016/b978-0-443-24002-7.00005-7},
booktitle={Accelerating the Transition to a Hydrogen Economy}, publisher={Elsevier},
author={Genovese, Matteo and Piraino, Francesco and Corigliano, Orlando and Schlüter,
Alexander and Scionti, Eugenio and Fragiacomo, Petronilla}, year={2025} }'
chicago: Genovese, Matteo, Francesco Piraino, Orlando Corigliano, Alexander Schlüter,
Eugenio Scionti, and Petronilla Fragiacomo. “Hydrogen Economy Development in the
European Union.” In Accelerating the Transition to a Hydrogen Economy.
Elsevier, 2025. https://doi.org/10.1016/b978-0-443-24002-7.00005-7.
ieee: M. Genovese, F. Piraino, O. Corigliano, A. Schlüter, E. Scionti, and P. Fragiacomo,
“Hydrogen economy development in the European Union,” in Accelerating the Transition
to a Hydrogen Economy, Elsevier, 2025.
mla: Genovese, Matteo, et al. “Hydrogen Economy Development in the European Union.”
Accelerating the Transition to a Hydrogen Economy, Elsevier, 2025, doi:10.1016/b978-0-443-24002-7.00005-7.
short: 'M. Genovese, F. Piraino, O. Corigliano, A. Schlüter, E. Scionti, P. Fragiacomo,
in: Accelerating the Transition to a Hydrogen Economy, Elsevier, 2025.'
date_created: 2025-05-07T11:57:50Z
date_updated: 2026-01-06T08:23:15Z
department:
- _id: '876'
- _id: '321'
- _id: '9'
- _id: '393'
doi: 10.1016/b978-0-443-24002-7.00005-7
language:
- iso: eng
publication: Accelerating the Transition to a Hydrogen Economy
publication_identifier:
isbn:
- '9780443240027'
publication_status: published
publisher: Elsevier
status: public
title: Hydrogen economy development in the European Union
type: book_chapter
user_id: '103302'
year: '2025'
...
---
_id: '63505'
abstract:
- lang: eng
text: |-
Abstract
The main goal of this work is to study the $L^{p}$-asymptotic behavior of solutions to the heat equation on arbitrary rank Riemannian symmetric spaces of non-compact-type $G/K$ for non-bi-$K$ invariant initial data. For initial data $u_{0}$ compactly supported or in a weighted $L^{1}(G/K)$ space with a weight depending on $p\in [1, \infty ]$, we introduce a mass function $M_{p}(u_{0})(\cdot )$, and prove that if $h_{t}$ is the heat kernel on $G/K$, then $$ \begin{align*} &\|h_t\|_p^{-1}\,\|u_0\ast h_t \, - \,M_p(u_0)(\cdot)\,h_t\|_p \rightarrow 0 \quad \textrm{as} \quad t\rightarrow \infty.\end{align*} $$ Interestingly, the $L^{p}$ heat concentration leads to completely different expressions of the mass function for $1\leq p <2$ and $2\leq p\leq \infty $. If we further assume that the initial data are bi-$K$-invariant, then our mass function boils down to the constant $\int _{G/K}u_{0}$ in the case $p=1$, and more generally to $\mathcal{H}{u_{0}}(i\rho (2/p-1))$ if $1\leq p<2$, and to $\mathcal{H}{u_{0}}(0)$ if $2\leq p \leq \infty $. Thus, we improve upon results by Vázquez, Anker et al., and Naik et al., clarifying the nature of the problem.
article_number: rnaf074
author:
- first_name: Effie
full_name: Papageorgiou, Effie
last_name: Papageorgiou
citation:
ama: Papageorgiou E. L p Asymptotics for the Heat Equation on Symmetric
Spaces for Non-symmetric Solutions. International Mathematics Research Notices.
2025;2025(7). doi:10.1093/imrn/rnaf074
apa: Papageorgiou, E. (2025). L p Asymptotics for the Heat Equation
on Symmetric Spaces for Non-symmetric Solutions. International Mathematics
Research Notices, 2025(7), Article rnaf074. https://doi.org/10.1093/imrn/rnaf074
bibtex: '@article{Papageorgiou_2025, title={L p Asymptotics for
the Heat Equation on Symmetric Spaces for Non-symmetric Solutions}, volume={2025},
DOI={10.1093/imrn/rnaf074},
number={7rnaf074}, journal={International Mathematics Research Notices}, publisher={Oxford
University Press (OUP)}, author={Papageorgiou, Effie}, year={2025} }'
chicago: Papageorgiou, Effie. “L p Asymptotics for the Heat Equation
on Symmetric Spaces for Non-Symmetric Solutions.” International Mathematics
Research Notices 2025, no. 7 (2025). https://doi.org/10.1093/imrn/rnaf074.
ieee: 'E. Papageorgiou, “L p Asymptotics for the Heat Equation
on Symmetric Spaces for Non-symmetric Solutions,” International Mathematics
Research Notices, vol. 2025, no. 7, Art. no. rnaf074, 2025, doi: 10.1093/imrn/rnaf074.'
mla: Papageorgiou, Effie. “L p Asymptotics for the Heat Equation
on Symmetric Spaces for Non-Symmetric Solutions.” International Mathematics
Research Notices, vol. 2025, no. 7, rnaf074, Oxford University Press (OUP),
2025, doi:10.1093/imrn/rnaf074.
short: E. Papageorgiou, International Mathematics Research Notices 2025 (2025).
date_created: 2026-01-06T09:45:00Z
date_updated: 2026-01-06T09:45:12Z
doi: 10.1093/imrn/rnaf074
intvolume: ' 2025'
issue: '7'
language:
- iso: eng
publication: International Mathematics Research Notices
publication_identifier:
issn:
- 1073-7928
- 1687-0247
publication_status: published
publisher: Oxford University Press (OUP)
status: public
title: |-
L
p Asymptotics for the Heat Equation on Symmetric Spaces for Non-symmetric Solutions
type: journal_article
user_id: '100325'
volume: 2025
year: '2025'
...
---
_id: '63503'
author:
- first_name: Tommaso
full_name: Bruno, Tommaso
last_name: Bruno
- first_name: Effie
full_name: Papageorgiou, Effie
last_name: Papageorgiou
citation:
ama: Bruno T, Papageorgiou E. Pointwise convergence to initial data for some evolution
equations on symmetric spaces. Journal d’Analyse Mathématique. 2025;157(2):733-767.
doi:10.1007/s11854-025-0403-2
apa: Bruno, T., & Papageorgiou, E. (2025). Pointwise convergence to initial
data for some evolution equations on symmetric spaces. Journal d’Analyse Mathématique,
157(2), 733–767. https://doi.org/10.1007/s11854-025-0403-2
bibtex: '@article{Bruno_Papageorgiou_2025, title={Pointwise convergence to initial
data for some evolution equations on symmetric spaces}, volume={157}, DOI={10.1007/s11854-025-0403-2},
number={2}, journal={Journal d’Analyse Mathématique}, publisher={Springer Science
and Business Media LLC}, author={Bruno, Tommaso and Papageorgiou, Effie}, year={2025},
pages={733–767} }'
chicago: 'Bruno, Tommaso, and Effie Papageorgiou. “Pointwise Convergence to Initial
Data for Some Evolution Equations on Symmetric Spaces.” Journal d’Analyse Mathématique
157, no. 2 (2025): 733–67. https://doi.org/10.1007/s11854-025-0403-2.'
ieee: 'T. Bruno and E. Papageorgiou, “Pointwise convergence to initial data for
some evolution equations on symmetric spaces,” Journal d’Analyse Mathématique,
vol. 157, no. 2, pp. 733–767, 2025, doi: 10.1007/s11854-025-0403-2.'
mla: Bruno, Tommaso, and Effie Papageorgiou. “Pointwise Convergence to Initial Data
for Some Evolution Equations on Symmetric Spaces.” Journal d’Analyse Mathématique,
vol. 157, no. 2, Springer Science and Business Media LLC, 2025, pp. 733–67, doi:10.1007/s11854-025-0403-2.
short: T. Bruno, E. Papageorgiou, Journal d’Analyse Mathématique 157 (2025) 733–767.
date_created: 2026-01-06T09:40:00Z
date_updated: 2026-01-06T09:41:02Z
doi: 10.1007/s11854-025-0403-2
intvolume: ' 157'
issue: '2'
language:
- iso: eng
page: 733-767
publication: Journal d'Analyse Mathématique
publication_identifier:
issn:
- 0021-7670
- 1565-8538
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Pointwise convergence to initial data for some evolution equations on symmetric
spaces
type: journal_article
user_id: '100325'
volume: 157
year: '2025'
...
---
_id: '61753'
abstract:
- lang: eng
text: This paper presents LOLA, a massively multilingual large language model trained
on more than 160 languages using a sparse Mixture-of-Experts Transformer architecture.
Our architectural and implementation choices address the challenge of harnessing
linguistic diversity while maintaining efficiency and avoiding the common pitfalls
of multilinguality. Our analysis of the evaluation results shows competitive performance
in natural language generation and understanding tasks. Additionally, we demonstrate
how the learned expert-routing mechanism exploits implicit phylogenetic linguistic
patterns to potentially alleviate the curse of multilinguality. We provide an
in-depth look at the training process, an analysis of the datasets, and a balanced
exploration of the model{’}s strengths and limitations. As an open-source model,
LOLA promotes reproducibility and serves as a robust foundation for future research.
Our findings enable the development of compute-efficient multilingual models with
strong, scalable performance across languages.
author:
- first_name: Nikit
full_name: Srivastava, Nikit
id: '70066'
last_name: Srivastava
orcid: 0009-0004-5164-4911
- first_name: Denis
full_name: Kuchelev, Denis
id: '70842'
last_name: Kuchelev
- first_name: Tatiana
full_name: Moteu Ngoli, Tatiana
id: '99174'
last_name: Moteu Ngoli
- first_name: Kshitij
full_name: Shetty, Kshitij
last_name: Shetty
- first_name: Michael
full_name: Röder, Michael
id: '67199'
last_name: Röder
orcid: https://orcid.org/0000-0002-8609-8277
- first_name: Hamada Mohamed Abdelsamee
full_name: Zahera, Hamada Mohamed Abdelsamee
id: '72768'
last_name: Zahera
orcid: 0000-0003-0215-1278
- first_name: Diego
full_name: Moussallem, Diego
id: '71635'
last_name: Moussallem
- first_name: Axel-Cyrille
full_name: Ngonga Ngomo, Axel-Cyrille
id: '65716'
last_name: Ngonga Ngomo
citation:
ama: 'Srivastava N, Kuchelev D, Moteu Ngoli T, et al. LOLA – An Open-Source Massively
Multilingual Large Language Model. In: Rambow O, Wanner L, Apidianaki M, Al-Khalifa
H, Eugenio BD, Schockaert S, eds. Proceedings of the 31st International Conference
on Computational Linguistics. Association for Computational Linguistics; 2025:6420–6446.'
apa: Srivastava, N., Kuchelev, D., Moteu Ngoli, T., Shetty, K., Röder, M., Zahera,
H. M. A., Moussallem, D., & Ngonga Ngomo, A.-C. (2025). LOLA – An Open-Source
Massively Multilingual Large Language Model. In O. Rambow, L. Wanner, M. Apidianaki,
H. Al-Khalifa, B. D. Eugenio, & S. Schockaert (Eds.), Proceedings of the
31st International Conference on Computational Linguistics (pp. 6420–6446).
Association for Computational Linguistics.
bibtex: '@inproceedings{Srivastava_Kuchelev_Moteu Ngoli_Shetty_Röder_Zahera_Moussallem_Ngonga
Ngomo_2025, place={Abu Dhabi, UAE}, title={LOLA – An Open-Source Massively Multilingual
Large Language Model}, booktitle={Proceedings of the 31st International Conference
on Computational Linguistics}, publisher={Association for Computational Linguistics},
author={Srivastava, Nikit and Kuchelev, Denis and Moteu Ngoli, Tatiana and Shetty,
Kshitij and Röder, Michael and Zahera, Hamada Mohamed Abdelsamee and Moussallem,
Diego and Ngonga Ngomo, Axel-Cyrille}, editor={Rambow, Owen and Wanner, Leo and
Apidianaki, Marianna and Al-Khalifa, Hend and Eugenio, Barbara Di and Schockaert,
Steven}, year={2025}, pages={6420–6446} }'
chicago: 'Srivastava, Nikit, Denis Kuchelev, Tatiana Moteu Ngoli, Kshitij Shetty,
Michael Röder, Hamada Mohamed Abdelsamee Zahera, Diego Moussallem, and Axel-Cyrille
Ngonga Ngomo. “LOLA – An Open-Source Massively Multilingual Large Language Model.”
In Proceedings of the 31st International Conference on Computational Linguistics,
edited by Owen Rambow, Leo Wanner, Marianna Apidianaki, Hend Al-Khalifa, Barbara
Di Eugenio, and Steven Schockaert, 6420–6446. Abu Dhabi, UAE: Association for
Computational Linguistics, 2025.'
ieee: N. Srivastava et al., “LOLA – An Open-Source Massively Multilingual
Large Language Model,” in Proceedings of the 31st International Conference
on Computational Linguistics, 2025, pp. 6420–6446.
mla: Srivastava, Nikit, et al. “LOLA – An Open-Source Massively Multilingual Large
Language Model.” Proceedings of the 31st International Conference on Computational
Linguistics, edited by Owen Rambow et al., Association for Computational Linguistics,
2025, pp. 6420–6446.
short: 'N. Srivastava, D. Kuchelev, T. Moteu Ngoli, K. Shetty, M. Röder, H.M.A.
Zahera, D. Moussallem, A.-C. Ngonga Ngomo, in: O. Rambow, L. Wanner, M. Apidianaki,
H. Al-Khalifa, B.D. Eugenio, S. Schockaert (Eds.), Proceedings of the 31st International
Conference on Computational Linguistics, Association for Computational Linguistics,
Abu Dhabi, UAE, 2025, pp. 6420–6446.'
date_created: 2025-10-08T11:02:30Z
date_updated: 2026-01-06T10:11:37Z
editor:
- first_name: Owen
full_name: Rambow, Owen
last_name: Rambow
- first_name: Leo
full_name: Wanner, Leo
last_name: Wanner
- first_name: Marianna
full_name: Apidianaki, Marianna
last_name: Apidianaki
- first_name: Hend
full_name: Al-Khalifa, Hend
last_name: Al-Khalifa
- first_name: Barbara Di
full_name: Eugenio, Barbara Di
last_name: Eugenio
- first_name: Steven
full_name: Schockaert, Steven
last_name: Schockaert
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://aclanthology.org/2025.coling-main.428.pdf
oa: '1'
page: 6420–6446
place: Abu Dhabi, UAE
publication: Proceedings of the 31st International Conference on Computational Linguistics
publisher: Association for Computational Linguistics
status: public
title: LOLA – An Open-Source Massively Multilingual Large Language Model
type: conference
user_id: '70066'
year: '2025'
...
---
_id: '63507'
author:
- first_name: Gaurav
full_name: Pandit, Gaurav
last_name: Pandit
- 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: 'Pandit G, Röder M, Ngonga Ngomo A-C. Evaluating Approximate Nearest Neighbour
Search Systems on Knowledge Graph Embeddings. In: Lecture Notes in Computer
Science. Springer Nature Switzerland; 2025. doi:10.1007/978-3-031-94575-5_4'
apa: Pandit, G., Röder, M., & Ngonga Ngomo, A.-C. (2025). Evaluating Approximate
Nearest Neighbour Search Systems on Knowledge Graph Embeddings. In Lecture
Notes in Computer Science. Springer Nature Switzerland. https://doi.org/10.1007/978-3-031-94575-5_4
bibtex: '@inbook{Pandit_Röder_Ngonga Ngomo_2025, place={Cham}, title={Evaluating
Approximate Nearest Neighbour Search Systems on Knowledge Graph Embeddings}, DOI={10.1007/978-3-031-94575-5_4},
booktitle={Lecture Notes in Computer Science}, publisher={Springer Nature Switzerland},
author={Pandit, Gaurav and Röder, Michael and Ngonga Ngomo, Axel-Cyrille}, year={2025}
}'
chicago: 'Pandit, Gaurav, Michael Röder, and Axel-Cyrille Ngonga Ngomo. “Evaluating
Approximate Nearest Neighbour Search Systems on Knowledge Graph Embeddings.” In
Lecture Notes in Computer Science. Cham: Springer Nature Switzerland, 2025.
https://doi.org/10.1007/978-3-031-94575-5_4.'
ieee: 'G. Pandit, M. Röder, and A.-C. Ngonga Ngomo, “Evaluating Approximate Nearest
Neighbour Search Systems on Knowledge Graph Embeddings,” in Lecture Notes in
Computer Science, Cham: Springer Nature Switzerland, 2025.'
mla: Pandit, Gaurav, et al. “Evaluating Approximate Nearest Neighbour Search Systems
on Knowledge Graph Embeddings.” Lecture Notes in Computer Science, Springer
Nature Switzerland, 2025, doi:10.1007/978-3-031-94575-5_4.
short: 'G. Pandit, M. Röder, A.-C. Ngonga Ngomo, in: Lecture Notes in Computer Science,
Springer Nature Switzerland, Cham, 2025.'
date_created: 2026-01-06T09:53:58Z
date_updated: 2026-01-06T09:55:26Z
department:
- _id: '574'
- _id: '923'
doi: 10.1007/978-3-031-94575-5_4
language:
- iso: eng
place: Cham
publication: Lecture Notes in Computer Science
publication_identifier:
isbn:
- '9783031945748'
- '9783031945755'
issn:
- 0302-9743
- 1611-3349
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: Evaluating Approximate Nearest Neighbour Search Systems on Knowledge Graph
Embeddings
type: book_chapter
user_id: '67199'
year: '2025'
...
---
_id: '63511'
abstract:
- lang: eng
text: Der unsystematische und ineffiziente Umgang mit technischen Änderungen führt
zuhohen Personalkosten durch Mehraufwand, einer reduzierten Entscheidungsqualität
und kannin Projektfehlschlägen resultieren. Herausforderungen beim Umgang mit
technischen Änderungenliegen in der Berücksichtigung relevanter Ursache-Wirkungs-Zusammenhänge,
der quantitativen und qualitativen Bewertung der Auswirkungen und der effizienten
prozessualen Einbindung. Mithilfe eines modellbasierten Lösungsansatzes lassen
sich die Auswirkungen technischer Änderungen schneller bewerten und fundierte
Entwicklungsentscheidungen treffen. In der vorliegenden Dissertation wird eine
Methodik für die Entwicklung modell-basierter Wirkkettenanalysen zur Bewertung
technischer Änderungen beschrieben. Durch die modellbasierte Wirkkettenanalyse
können direkt oder indirekt von der Änderung betroffene Modellelemente identifiziert
werden. Das Datenmodell wird mithilfe von Abfragesprachen analysiert und die Auswirkungen
werden mithilfe von integrierten Metriken quantifiziert. Die Ergebnisse der Wirkkettenanalyse
werden in rollenspezifischen Sichten bereitgestellt, wodurch eine bedarfsgerechte
Entscheidungsunterstützung gewährleistet wird. Die Validierung anhand von vier
industriellen Fallstudien belegt die Praxistauglichkeit der Methodik. Die Methodik
verbindet das Änderungsmanagement mit den Vorteilen einer modellbasierten Systementwicklung
und bildet somit einen synergetischen neuen Forschungsbereich.
- lang: eng
text: The unsystematic and inefficient handling of technical changes leads to high
personnel costs due to additional work, reduced decision-making quality and can
result in project failures. The challenges in dealing with technical changes arise
in the consideration of relevant cause-and-effect relationships, the quantitative
and qualitative assessment of the effects and the efficient process integration.
With the help of a model-based solution approach, the effects of technical changes
can be assessed more quickly and profound development decisions can be made. This
dissertation describes a methodology for the development of model-based effect
chain analyses for the evaluation of technical changes. Model-based effect chain
analyses can be used to identify model elements that are directly or indirectly
affected by the change. The data model is analysed using query languages and the
effects are quantified using integrated metrics. The results of the impact chain
analysis are provided in role-specific views, which ensures needs-based decision
support. The validation based on four industrial case studies demonstrates the
practical applicability of the methodology. The methodology combines change management
with the advantages of model-based system development and thus forms a synergetic
new area of research.
author:
- first_name: Dominik
full_name: Wiechel, Dominik
last_name: Wiechel
citation:
ama: Wiechel D. Modellbasierte Wirkkettenanalyse Zur Bewertung Technischer Änderungen.
Vol 432.; 2025. doi:10.17619/UNIPB/1-2473
apa: Wiechel, D. (2025). Modellbasierte Wirkkettenanalyse zur Bewertung technischer
Änderungen (Vol. 432). https://doi.org/10.17619/UNIPB/1-2473
bibtex: '@book{Wiechel_2025, place={Paderborn}, series={Verlagsschriftenreihe des
Heinz Nixdorf Instituts}, title={Modellbasierte Wirkkettenanalyse zur Bewertung
technischer Änderungen}, volume={432}, DOI={10.17619/UNIPB/1-2473},
author={Wiechel, Dominik}, year={2025}, collection={Verlagsschriftenreihe des
Heinz Nixdorf Instituts} }'
chicago: Wiechel, Dominik. Modellbasierte Wirkkettenanalyse Zur Bewertung Technischer
Änderungen. Vol. 432. Verlagsschriftenreihe Des Heinz Nixdorf Instituts. Paderborn,
2025. https://doi.org/10.17619/UNIPB/1-2473.
ieee: D. Wiechel, Modellbasierte Wirkkettenanalyse zur Bewertung technischer
Änderungen, vol. 432. Paderborn, 2025.
mla: Wiechel, Dominik. Modellbasierte Wirkkettenanalyse Zur Bewertung Technischer
Änderungen. 2025, doi:10.17619/UNIPB/1-2473.
short: D. Wiechel, Modellbasierte Wirkkettenanalyse Zur Bewertung Technischer Änderungen,
Paderborn, 2025.
date_created: 2026-01-06T20:20:58Z
date_updated: 2026-01-06T20:27:08Z
department:
- _id: '152'
doi: 10.17619/UNIPB/1-2473
extern: '1'
intvolume: ' 432'
language:
- iso: eng
place: Paderborn
publication_identifier:
isbn:
- 978-3-947647-51-4
issn:
- 2365-4422
publication_status: published
series_title: Verlagsschriftenreihe des Heinz Nixdorf Instituts
status: public
title: Modellbasierte Wirkkettenanalyse zur Bewertung technischer Änderungen
type: dissertation
user_id: '67161'
volume: 432
year: '2025'
...
---
_id: '62924'
author:
- first_name: Laura
full_name: Wittkopp, Laura
id: '81147'
last_name: Wittkopp
- first_name: Pascal
full_name: Pollmeier, Pascal
id: '44191'
last_name: Pollmeier
- first_name: Sabine
full_name: Fechner, Sabine
id: '54823'
last_name: Fechner
orcid: 0000-0001-5645-5870
citation:
ama: 'Wittkopp L, Pollmeier P, Fechner S. Effekte nachhaltigkeitsbezogener Kontexte
beim Chemielernen. In: Jahrestagung Der Gesellschaft Für Didaktik Der Chemie
Und Physik e.V. (GDCP). ; 2025.'
apa: Wittkopp, L., Pollmeier, P., & Fechner, S. (2025). Effekte nachhaltigkeitsbezogener
Kontexte beim Chemielernen. Jahrestagung Der Gesellschaft Für Didaktik Der
Chemie Und Physik e.V. (GDCP). Jahrestagung der Gesellschaft für Didaktik
der Chemie und Physik, Frankfurt am Main.
bibtex: '@inproceedings{Wittkopp_Pollmeier_Fechner_2025, title={Effekte nachhaltigkeitsbezogener
Kontexte beim Chemielernen}, booktitle={Jahrestagung der Gesellschaft für Didaktik
der Chemie und Physik e.V. (GDCP)}, author={Wittkopp, Laura and Pollmeier, Pascal
and Fechner, Sabine}, year={2025} }'
chicago: Wittkopp, Laura, Pascal Pollmeier, and Sabine Fechner. “Effekte Nachhaltigkeitsbezogener
Kontexte Beim Chemielernen.” In Jahrestagung Der Gesellschaft Für Didaktik
Der Chemie Und Physik e.V. (GDCP), 2025.
ieee: L. Wittkopp, P. Pollmeier, and S. Fechner, “Effekte nachhaltigkeitsbezogener
Kontexte beim Chemielernen,” presented at the Jahrestagung der Gesellschaft für
Didaktik der Chemie und Physik, Frankfurt am Main, 2025.
mla: Wittkopp, Laura, et al. “Effekte Nachhaltigkeitsbezogener Kontexte Beim Chemielernen.”
Jahrestagung Der Gesellschaft Für Didaktik Der Chemie Und Physik e.V. (GDCP),
2025.
short: 'L. Wittkopp, P. Pollmeier, S. Fechner, in: Jahrestagung Der Gesellschaft
Für Didaktik Der Chemie Und Physik e.V. (GDCP), 2025.'
conference:
end_date: 2025-09-11
location: Frankfurt am Main
name: Jahrestagung der Gesellschaft für Didaktik der Chemie und Physik
start_date: 2025-09-08
date_created: 2025-12-05T13:41:11Z
date_updated: 2026-01-06T16:12:06Z
department:
- _id: '386'
language:
- iso: eng
publication: Jahrestagung der Gesellschaft für Didaktik der Chemie und Physik e.V.
(GDCP)
status: public
title: Effekte nachhaltigkeitsbezogener Kontexte beim Chemielernen
type: conference_abstract
user_id: '81147'
year: '2025'
...
---
_id: '63510'
abstract:
- lang: eng
text: It has been shown recently that optimal control problems with the dynamical
constraint given by a second order system admit a regular Lagrangian formulation.
This implies that the optimality conditions can be obtained in a new form based
on the variational approach. In this paper we extend the first order necessary
optimality conditions obtained previously to second order optimality conditions.
This results in a complete characterization of the optimality conditions in a
new Lagrangian form.
author:
- first_name: Michael
full_name: Konopik, Michael
last_name: Konopik
- first_name: Sigrid
full_name: Leyendecker, Sigrid
last_name: Leyendecker
- first_name: Sofya
full_name: Maslovskaya, Sofya
last_name: Maslovskaya
- first_name: Sina Ober-Blöbaum
full_name: Sina Ober-Blöbaum, Sina Ober-Blöbaum
last_name: Sina Ober-Blöbaum
- first_name: Rodrigo T. Sato Martín de
full_name: Almagro, Rodrigo T. Sato Martín de
last_name: Almagro
citation:
ama: Konopik M, Leyendecker S, Maslovskaya S, Sina Ober-Blöbaum SO-B, Almagro RTSM
de. Second order optimality conditions in a new Lagrangian formulation for optimal
control problems. arXiv:250706024. Published online 2025.
apa: Konopik, M., Leyendecker, S., Maslovskaya, S., Sina Ober-Blöbaum, S. O.-B.,
& Almagro, R. T. S. M. de. (2025). Second order optimality conditions in a
new Lagrangian formulation for optimal control problems. In arXiv:2507.06024.
bibtex: '@article{Konopik_Leyendecker_Maslovskaya_Sina Ober-Blöbaum_Almagro_2025,
title={Second order optimality conditions in a new Lagrangian formulation for
optimal control problems}, journal={arXiv:2507.06024}, author={Konopik, Michael
and Leyendecker, Sigrid and Maslovskaya, Sofya and Sina Ober-Blöbaum, Sina Ober-Blöbaum
and Almagro, Rodrigo T. Sato Martín de}, year={2025} }'
chicago: Konopik, Michael, Sigrid Leyendecker, Sofya Maslovskaya, Sina Ober-Blöbaum
Sina Ober-Blöbaum, and Rodrigo T. Sato Martín de Almagro. “Second Order Optimality
Conditions in a New Lagrangian Formulation for Optimal Control Problems.” ArXiv:2507.06024,
2025.
ieee: M. Konopik, S. Leyendecker, S. Maslovskaya, S. O.-B. Sina Ober-Blöbaum, and
R. T. S. M. de Almagro, “Second order optimality conditions in a new Lagrangian
formulation for optimal control problems,” arXiv:2507.06024. 2025.
mla: Konopik, Michael, et al. “Second Order Optimality Conditions in a New Lagrangian
Formulation for Optimal Control Problems.” ArXiv:2507.06024, 2025.
short: M. Konopik, S. Leyendecker, S. Maslovskaya, S.O.-B. Sina Ober-Blöbaum, R.T.S.M.
de Almagro, ArXiv:2507.06024 (2025).
date_created: 2026-01-06T18:28:18Z
date_updated: 2026-01-06T18:29:15Z
department:
- _id: '636'
external_id:
arxiv:
- '2507.06024'
language:
- iso: eng
publication: arXiv:2507.06024
status: public
title: Second order optimality conditions in a new Lagrangian formulation for optimal
control problems
type: preprint
user_id: '87909'
year: '2025'
...
---
_id: '59797'
author:
- first_name: Michael
full_name: Konopik, Michael
last_name: Konopik
- first_name: Rodrigo
full_name: T. Sato Martín de Almagro, Rodrigo
last_name: T. Sato Martín de Almagro
- 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: Sigrid
full_name: Leyendecker, Sigrid
last_name: Leyendecker
citation:
ama: Konopik M, T. Sato Martín de Almagro R, Maslovskaya S, Ober-Blöbaum S, Leyendecker
S. Variational integrators for a new Lagrangian approach to control affine systems
with a quadratic Lagrange term. Journal of Nonlinear Science. 2025;36(11).
doi:10.1007/s00332-025-10229-5
apa: Konopik, M., T. Sato Martín de Almagro, R., Maslovskaya, S., Ober-Blöbaum,
S., & Leyendecker, S. (2025). Variational integrators for a new Lagrangian
approach to control affine systems with a quadratic Lagrange term. Journal
of Nonlinear Science, 36(11). https://doi.org/10.1007/s00332-025-10229-5
bibtex: '@article{Konopik_T. Sato Martín de Almagro_Maslovskaya_Ober-Blöbaum_Leyendecker_2025,
title={Variational integrators for a new Lagrangian approach to control affine
systems with a quadratic Lagrange term}, volume={36}, DOI={10.1007/s00332-025-10229-5},
number={11}, journal={Journal of Nonlinear Science}, author={Konopik, Michael
and T. Sato Martín de Almagro, Rodrigo and Maslovskaya, Sofya and Ober-Blöbaum,
Sina and Leyendecker, Sigrid}, year={2025} }'
chicago: Konopik, Michael, Rodrigo T. Sato Martín de Almagro, Sofya Maslovskaya,
Sina Ober-Blöbaum, and Sigrid Leyendecker. “Variational Integrators for a New
Lagrangian Approach to Control Affine Systems with a Quadratic Lagrange Term.”
Journal of Nonlinear Science 36, no. 11 (2025). https://doi.org/10.1007/s00332-025-10229-5.
ieee: 'M. Konopik, R. T. Sato Martín de Almagro, S. Maslovskaya, S. Ober-Blöbaum,
and S. Leyendecker, “Variational integrators for a new Lagrangian approach to
control affine systems with a quadratic Lagrange term,” Journal of Nonlinear
Science, vol. 36, no. 11, 2025, doi: 10.1007/s00332-025-10229-5.'
mla: Konopik, Michael, et al. “Variational Integrators for a New Lagrangian Approach
to Control Affine Systems with a Quadratic Lagrange Term.” Journal of Nonlinear
Science, vol. 36, no. 11, 2025, doi:10.1007/s00332-025-10229-5.
short: M. Konopik, R. T. Sato Martín de Almagro, S. Maslovskaya, S. Ober-Blöbaum,
S. Leyendecker, Journal of Nonlinear Science 36 (2025).
date_created: 2025-05-05T09:35:31Z
date_updated: 2026-01-06T18:26:57Z
department:
- _id: '636'
doi: 10.1007/s00332-025-10229-5
intvolume: ' 36'
issue: '11'
language:
- iso: eng
publication: Journal of Nonlinear Science
status: public
title: Variational integrators for a new Lagrangian approach to control affine systems
with a quadratic Lagrange term
type: journal_article
user_id: '87909'
volume: 36
year: '2025'
...
---
_id: '59799'
author:
- first_name: Michael
full_name: Konopik, Michael
last_name: Konopik
- first_name: Sigrid
full_name: Leyendecker, Sigrid
last_name: Leyendecker
- 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: Rodrigo
full_name: T. Sato Martín de Almagro, Rodrigo
last_name: T. Sato Martín de Almagro
citation:
ama: Konopik M, Leyendecker S, Maslovskaya S, Ober-Blöbaum S, T. Sato Martín de
Almagro R. A new Lagrangian approach to optimal control of second-order systems.
Nonlinearity. 2025;38(11). doi:10.1088/1361-6544/ae1d08
apa: Konopik, M., Leyendecker, S., Maslovskaya, S., Ober-Blöbaum, S., & T. Sato
Martín de Almagro, R. (2025). A new Lagrangian approach to optimal control of
second-order systems. Nonlinearity, 38(11). https://doi.org/10.1088/1361-6544/ae1d08
bibtex: '@article{Konopik_Leyendecker_Maslovskaya_Ober-Blöbaum_T. Sato Martín de
Almagro_2025, title={A new Lagrangian approach to optimal control of second-order
systems}, volume={38}, DOI={10.1088/1361-6544/ae1d08},
number={11}, journal={Nonlinearity}, author={Konopik, Michael and Leyendecker,
Sigrid and Maslovskaya, Sofya and Ober-Blöbaum, Sina and T. Sato Martín de Almagro,
Rodrigo}, year={2025} }'
chicago: Konopik, Michael, Sigrid Leyendecker, Sofya Maslovskaya, Sina Ober-Blöbaum,
and Rodrigo T. Sato Martín de Almagro. “A New Lagrangian Approach to Optimal Control
of Second-Order Systems.” Nonlinearity 38, no. 11 (2025). https://doi.org/10.1088/1361-6544/ae1d08.
ieee: 'M. Konopik, S. Leyendecker, S. Maslovskaya, S. Ober-Blöbaum, and R. T. Sato
Martín de Almagro, “A new Lagrangian approach to optimal control of second-order
systems,” Nonlinearity, vol. 38, no. 11, 2025, doi: 10.1088/1361-6544/ae1d08.'
mla: Konopik, Michael, et al. “A New Lagrangian Approach to Optimal Control of Second-Order
Systems.” Nonlinearity, vol. 38, no. 11, 2025, doi:10.1088/1361-6544/ae1d08.
short: M. Konopik, S. Leyendecker, S. Maslovskaya, S. Ober-Blöbaum, R. T. Sato Martín
de Almagro, Nonlinearity 38 (2025).
date_created: 2025-05-05T09:37:50Z
date_updated: 2026-01-06T18:24:40Z
department:
- _id: '636'
doi: 10.1088/1361-6544/ae1d08
intvolume: ' 38'
issue: '11'
language:
- iso: eng
publication: Nonlinearity
status: public
title: A new Lagrangian approach to optimal control of second-order systems
type: journal_article
user_id: '87909'
volume: 38
year: '2025'
...
---
_id: '63091'
abstract:
- lang: eng
text: We present the design and characterization of a guided-wave, bright, and highly
frequency non-degenerate parametric down-conversion (PDC) source in thin-film
lithium niobate. The source generates photon pairs with wavelengths of 815 nm
and 1550 nm, linking the visible wavelength regime with telecommunication wavelengths.
We confirm the high quality of the generated single photons by determining a value
for the heralded second-order correlation function as low as g_h^(2)=(6.7+/-1.1)*10^8-3).
Furthermore, we achieve a high spectral brightness of 0.44·10pairs/(smWGHz) which
is two orders of magnitude higher than sources based on weakly guiding waveguides.
The shape of the PDC spectrum and the strong agreement between the effective and
nominal bandwidth highlight our high fabrication quality of periodically poled
waveguides. The good agreement between the measured and simulated spectral characteristics
of our source demonstrates our excellent understanding of the PDC process. Our
result is a valuable step towards practical and scalable quantum communication
networks as well as photonic quantum computing.
article_number: '52729'
article_type: original
author:
- first_name: Silia
full_name: Babel, Silia
id: '63231'
last_name: Babel
orcid: https://orcid.org/0000-0002-1568-2580
- first_name: Laura
full_name: Bollmers, Laura
id: '61375'
last_name: Bollmers
- first_name: Franz
full_name: Roeder, Franz
id: '88149'
last_name: Roeder
- first_name: Werner
full_name: Ridder, Werner
id: '63574'
last_name: Ridder
- first_name: Christian
full_name: Golla, Christian
id: '40420'
last_name: Golla
- first_name: Ronja
full_name: Köthemann, Ronja
last_name: Köthemann
- first_name: Bernhard
full_name: Reineke, Bernhard
id: '29821'
last_name: Reineke
- first_name: Harald
full_name: Herrmann, Harald
id: '216'
last_name: Herrmann
- first_name: Benjamin
full_name: Brecht, Benjamin
id: '27150'
last_name: Brecht
orcid: '0000-0003-4140-0556 '
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Laura
full_name: Padberg, Laura
id: '40300'
last_name: Padberg
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
citation:
ama: Babel S, Bollmers L, Roeder F, et al. Ultrabright, two-color photon pair source
based on thin-film lithium niobate for bridging visible and telecom wavelengths.
Optics Express. 2025;33(25). doi:10.1364/oe.571605
apa: Babel, S., Bollmers, L., Roeder, F., Ridder, W., Golla, C., Köthemann, R.,
Reineke, B., Herrmann, H., Brecht, B., Eigner, C., Padberg, L., & Silberhorn,
C. (2025). Ultrabright, two-color photon pair source based on thin-film lithium
niobate for bridging visible and telecom wavelengths. Optics Express, 33(25),
Article 52729. https://doi.org/10.1364/oe.571605
bibtex: '@article{Babel_Bollmers_Roeder_Ridder_Golla_Köthemann_Reineke_Herrmann_Brecht_Eigner_et
al._2025, title={Ultrabright, two-color photon pair source based on thin-film
lithium niobate for bridging visible and telecom wavelengths}, volume={33}, DOI={10.1364/oe.571605}, number={2552729},
journal={Optics Express}, publisher={Optica Publishing Group}, author={Babel,
Silia and Bollmers, Laura and Roeder, Franz and Ridder, Werner and Golla, Christian
and Köthemann, Ronja and Reineke, Bernhard and Herrmann, Harald and Brecht, Benjamin
and Eigner, Christof and et al.}, year={2025} }'
chicago: Babel, Silia, Laura Bollmers, Franz Roeder, Werner Ridder, Christian Golla,
Ronja Köthemann, Bernhard Reineke, et al. “Ultrabright, Two-Color Photon Pair
Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.”
Optics Express 33, no. 25 (2025). https://doi.org/10.1364/oe.571605.
ieee: 'S. Babel et al., “Ultrabright, two-color photon pair source based
on thin-film lithium niobate for bridging visible and telecom wavelengths,” Optics
Express, vol. 33, no. 25, Art. no. 52729, 2025, doi: 10.1364/oe.571605.'
mla: Babel, Silia, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film
Lithium Niobate for Bridging Visible and Telecom Wavelengths.” Optics Express,
vol. 33, no. 25, 52729, Optica Publishing Group, 2025, doi:10.1364/oe.571605.
short: S. Babel, L. Bollmers, F. Roeder, W. Ridder, C. Golla, R. Köthemann, B. Reineke,
H. Herrmann, B. Brecht, C. Eigner, L. Padberg, C. Silberhorn, Optics Express 33
(2025).
date_created: 2025-12-15T07:20:36Z
date_updated: 2026-01-07T11:28:35Z
department:
- _id: '288'
- _id: '623'
doi: 10.1364/oe.571605
intvolume: ' 33'
issue: '25'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-25-52729
oa: '1'
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Ultrabright, two-color photon pair source based on thin-film lithium niobate
for bridging visible and telecom wavelengths
type: journal_article
user_id: '63231'
volume: 33
year: '2025'
...
---
_id: '62713'
abstract:
- lang: eng
text: Periodically poled thin-film lithium niobate (TFLN) crystals are the fundamental
building block for highly-efficient quantum light sources and frequency converters.
The efficiency of these devices is strongly dependent on the interaction length
between the light and the nonlinear material, scaling quadratically with this
parameter. Nevertheless, the fabrication of long, continuously poled areas in
TFLN remains challenging, the length of continuously poled areas rarely exceeds
10 mm. In this work, we demonstrate a significant progress in this field achieving
the periodic poling of continuous poled areas of 70 mm length with a 3 μm poling
period and a close to 50 % duty cycle. We compare two poling electrode design
approaches to fabricate long, continuous poled areas. The first approach involves
the poling of a single, continuous 70 mm long electrode. The second utilize a
segmented approach including the poling of more than 20 individual sections forming
together a 70 mm long poling area with no stitching errors. While the continuous
electrode allows for faster fabrication, the segmented approach allows to individually
optimize the poling resulting in less duty cycle variation. A detailed analysis
of the periodic poling results reveals that the results of both are consistent
with previously reported poling outcomes for shorter devices. Thus, we demonstrate
wafer-scale periodic poling exceeding chiplet-size without any loss in the periodic
poling quality. Our work presents a key step towards highly-efficient, narrow-bandwidth
and low-pump power nonlinear optical devices.
article_type: original
author:
- first_name: Laura
full_name: Bollmers, Laura
id: '61375'
last_name: Bollmers
- first_name: Noah
full_name: Spiegelberg, Noah
last_name: Spiegelberg
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Laura
full_name: Padberg, Laura
id: '40300'
last_name: Padberg
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
citation:
ama: Bollmers L, Spiegelberg N, Rüsing M, Eigner C, Padberg L, Silberhorn C. Segmented
finger electrodes to optimize ultra-long continuous wafer-scale periodic poling
in thin-film lithium niobate. Nanophotonics. 2025;14:4761. doi:10.1515/nanoph-2025-0461
apa: Bollmers, L., Spiegelberg, N., Rüsing, M., Eigner, C., Padberg, L., & Silberhorn,
C. (2025). Segmented finger electrodes to optimize ultra-long continuous wafer-scale
periodic poling in thin-film lithium niobate. Nanophotonics, 14,
4761. https://doi.org/10.1515/nanoph-2025-0461
bibtex: '@article{Bollmers_Spiegelberg_Rüsing_Eigner_Padberg_Silberhorn_2025, title={Segmented
finger electrodes to optimize ultra-long continuous wafer-scale periodic poling
in thin-film lithium niobate}, volume={14}, DOI={10.1515/nanoph-2025-0461},
journal={Nanophotonics}, publisher={Walter de Gruyter GmbH}, author={Bollmers,
Laura and Spiegelberg, Noah and Rüsing, Michael and Eigner, Christof and Padberg,
Laura and Silberhorn, Christine}, year={2025}, pages={4761} }'
chicago: 'Bollmers, Laura, Noah Spiegelberg, Michael Rüsing, Christof Eigner, Laura
Padberg, and Christine Silberhorn. “Segmented Finger Electrodes to Optimize Ultra-Long
Continuous Wafer-Scale Periodic Poling in Thin-Film Lithium Niobate.” Nanophotonics
14 (2025): 4761. https://doi.org/10.1515/nanoph-2025-0461.'
ieee: 'L. Bollmers, N. Spiegelberg, M. Rüsing, C. Eigner, L. Padberg, and C. Silberhorn,
“Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic
poling in thin-film lithium niobate,” Nanophotonics, vol. 14, p. 4761,
2025, doi: 10.1515/nanoph-2025-0461.'
mla: Bollmers, Laura, et al. “Segmented Finger Electrodes to Optimize Ultra-Long
Continuous Wafer-Scale Periodic Poling in Thin-Film Lithium Niobate.” Nanophotonics,
vol. 14, Walter de Gruyter GmbH, 2025, p. 4761, doi:10.1515/nanoph-2025-0461.
short: L. Bollmers, N. Spiegelberg, M. Rüsing, C. Eigner, L. Padberg, C. Silberhorn,
Nanophotonics 14 (2025) 4761.
date_created: 2025-12-01T08:45:07Z
date_updated: 2026-01-07T12:06:29Z
department:
- _id: '15'
- _id: '288'
- _id: '623'
doi: 10.1515/nanoph-2025-0461
intvolume: ' 14'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1515/nanoph-2025-0461
oa: '1'
page: '4761'
publication: Nanophotonics
publication_identifier:
issn:
- 2192-8606
- 2192-8614
publication_status: published
publisher: Walter de Gruyter GmbH
quality_controlled: '1'
status: public
title: Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic
poling in thin-film lithium niobate
type: journal_article
user_id: '22501'
volume: 14
year: '2025'
...
---
_id: '63518'
author:
- first_name: Ruth Edith
full_name: Hagengruber, Ruth Edith
id: '198'
last_name: Hagengruber
orcid: https://orcid.org/0000-0003-3360-6335
citation:
ama: Hagengruber RE. Eine Demokratie, die das Recht der Frauen nicht verwirklicht,
ist nichtig". Das politische Meisterstücke der Olympe de Gouges (1748-1793). ZDPE.
2025;3.
apa: Hagengruber, R. E. (2025). Eine Demokratie, die das Recht der Frauen nicht
verwirklicht, ist nichtig". Das politische Meisterstücke der Olympe de Gouges
(1748-1793). ZDPE, 3.
bibtex: '@article{Hagengruber_2025, title={Eine Demokratie, die das Recht der Frauen
nicht verwirklicht, ist nichtig". Das politische Meisterstücke der Olympe de Gouges
(1748-1793)}, volume={3}, journal={ZDPE}, publisher={Bettina Bussmann und Vanessa
Albus}, author={Hagengruber, Ruth Edith}, year={2025} }'
chicago: Hagengruber, Ruth Edith. “Eine Demokratie, die das Recht der Frauen nicht
verwirklicht, ist nichtig". Das politische Meisterstücke der Olympe de Gouges
(1748-1793).” ZDPE 3 (2025).
ieee: R. E. Hagengruber, “Eine Demokratie, die das Recht der Frauen nicht verwirklicht,
ist nichtig". Das politische Meisterstücke der Olympe de Gouges (1748-1793),”
ZDPE, vol. 3, 2025.
mla: Hagengruber, Ruth Edith. “Eine Demokratie, die das Recht der Frauen nicht verwirklicht,
ist nichtig". Das politische Meisterstücke der Olympe de Gouges (1748-1793).”
ZDPE, vol. 3, Bettina Bussmann und Vanessa Albus, 2025.
short: R.E. Hagengruber, ZDPE 3 (2025).
date_created: 2026-01-07T12:35:34Z
date_updated: 2026-01-07T12:35:42Z
department:
- _id: '519'
intvolume: ' 3'
language:
- iso: ger
publication: ZDPE
publication_status: published
publisher: Bettina Bussmann und Vanessa Albus
status: public
title: Eine Demokratie, die das Recht der Frauen nicht verwirklicht, ist nichtig".
Das politische Meisterstücke der Olympe de Gouges (1748-1793)
type: journal_article
user_id: '91827'
volume: 3
year: '2025'
...