---
_id: '63393'
abstract:
- lang: eng
text: 'We study the evolution of zeros of high polynomial powers under the heat
flow. For any fixed polynomial $P(z)$, we prove that the empirical zero distribution
of its heat-evolved $n$-th power converges to a distribution on the complex plane
as $n$ tends to infinity. We describe this limit distribution $μ_t$ as a function
of the time parameter $t$ of the heat evolution: For small time, zeros start to
spread out in approximately semicircular distributions, then intricate curves
start to form and merge, until for large time, the zero distribution approaches
a widespread semicircle law through the initial center of mass. The Stieltjes
transform of the limit distribution $μ_t$ satisfies a self-consistent equation
and a Burgers'' equation. The present paper deals with general complex-rooted
polynomials for which, in contrast to the real-rooted case, no free-probabilistic
representation for $μ_t$ is available.'
author:
- first_name: Antonia
full_name: Höfert, Antonia
last_name: Höfert
- first_name: Jonas
full_name: Jalowy, Jonas
id: '113768'
last_name: Jalowy
orcid: 0000-0001-9624-2685
- first_name: Zakhar
full_name: Kabluchko, Zakhar
last_name: Kabluchko
citation:
ama: Höfert A, Jalowy J, Kabluchko Z. Zeros of polynomial powers under the heat
flow. arXiv:251217808. Published online 2025.
apa: Höfert, A., Jalowy, J., & Kabluchko, Z. (2025). Zeros of polynomial powers
under the heat flow. In arXiv:2512.17808.
bibtex: '@article{Höfert_Jalowy_Kabluchko_2025, title={Zeros of polynomial powers
under the heat flow}, journal={arXiv:2512.17808}, author={Höfert, Antonia and
Jalowy, Jonas and Kabluchko, Zakhar}, year={2025} }'
chicago: Höfert, Antonia, Jonas Jalowy, and Zakhar Kabluchko. “Zeros of Polynomial
Powers under the Heat Flow.” ArXiv:2512.17808, 2025.
ieee: A. Höfert, J. Jalowy, and Z. Kabluchko, “Zeros of polynomial powers under
the heat flow,” arXiv:2512.17808. 2025.
mla: Höfert, Antonia, et al. “Zeros of Polynomial Powers under the Heat Flow.” ArXiv:2512.17808,
2025.
short: A. Höfert, J. Jalowy, Z. Kabluchko, ArXiv:2512.17808 (2025).
date_created: 2025-12-22T08:36:24Z
date_updated: 2025-12-22T08:36:46Z
department:
- _id: '94'
external_id:
arxiv:
- '2512.17808'
language:
- iso: eng
publication: arXiv:2512.17808
status: public
title: Zeros of polynomial powers under the heat flow
type: preprint
user_id: '113768'
year: '2025'
...
---
_id: '63403'
abstract:
- lang: eng
text: "Stateful signatures like the NIST standardized signature schemes LMS and
XMSS provide an efficient and mature realization of post-quantum secure signature
schemes. They are recommended for long-term use cases like e.g. firmware signing.
However, stateful signature schemes require to properly manage a so-called state.
In stateful signature schemes like LMS and XMSS, signing keys consist of a set
of keys of a one-time signature scheme and it has to be guaranteed that each one-time
key is used only once. This is done by updating a state in each signature computation,
basically recording which one-time keys have already been used. While this is
straightforward in centralized systems, in distributed systems like secure enclaves
consisting of e.g. multiple hardware security modules (HSMs) with limited communication
keeping a distributed state that at any point in time is consistent among all
parties involved presents a challenge. This challenge is not addressed by the
current standardization processes. \r\nIn this paper we present a security model
for the distributed key management of post-quantum secure stateful signatures
like XMSS and LMS. We also present a simple, efficient, and easy to implement
protocol proven secure in this security model, i.e. the protocol guarantees at
any point in time a consistent state among the parties in a distributed system,
like a distributed security enclave. The security model is defined in the universal
composabilty (UC) framework by Ran Canetti by providing an ideal functionality
for the distributed key management for stateful signatures. Hence our protocol
remains secure even if arbitrarily composed with other instances of the same or
other protocols, a necessity for the security of distributed key management protocols.
Our main application are security enclaves consisting of HSMs, but the model and
the protocol can easily be adapted to other scenarios of distributed key management
of stateful signature schemes."
author:
- first_name: Johannes
full_name: Blömer, Johannes
id: '23'
last_name: Blömer
- first_name: Henrik
full_name: Bröcher, Henrik
id: '41047'
last_name: Bröcher
orcid: 0009-0008-3938-5485
- first_name: Volker
full_name: Krummel, Volker
last_name: Krummel
- first_name: Laurens Alexander
full_name: Porzenheim, Laurens Alexander
id: '47434'
last_name: Porzenheim
citation:
ama: Blömer J, Bröcher H, Krummel V, Porzenheim LA. Secure Distributed State Management
for Stateful Signatures with a Practical and Universally Composable Protocol.
apa: Blömer, J., Bröcher, H., Krummel, V., & Porzenheim, L. A. (n.d.). Secure
Distributed State Management for Stateful Signatures with a Practical and Universally
Composable Protocol.
bibtex: '@article{Blömer_Bröcher_Krummel_Porzenheim, title={Secure Distributed State
Management for Stateful Signatures with a Practical and Universally Composable
Protocol}, author={Blömer, Johannes and Bröcher, Henrik and Krummel, Volker and
Porzenheim, Laurens Alexander} }'
chicago: Blömer, Johannes, Henrik Bröcher, Volker Krummel, and Laurens Alexander
Porzenheim. “Secure Distributed State Management for Stateful Signatures with
a Practical and Universally Composable Protocol,” n.d.
ieee: J. Blömer, H. Bröcher, V. Krummel, and L. A. Porzenheim, “Secure Distributed
State Management for Stateful Signatures with a Practical and Universally Composable
Protocol.” .
mla: Blömer, Johannes, et al. Secure Distributed State Management for Stateful
Signatures with a Practical and Universally Composable Protocol.
short: J. Blömer, H. Bröcher, V. Krummel, L.A. Porzenheim, (n.d.).
date_created: 2025-12-22T21:23:22Z
date_updated: 2025-12-23T11:30:38Z
department:
- _id: '34'
- _id: '64'
keyword:
- distributed state
- hash-based signature
- stateful hash-based signature
- universal composability
- secure enclave
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://eprint.iacr.org/2025/2278.pdf
oa: '1'
page: '22'
project:
- _id: '191'
name: 'PhoQuant: Photonische Quantencomputer - Quantencomputing Testplattform'
publication_status: submitted
status: public
title: Secure Distributed State Management for Stateful Signatures with a Practical
and Universally Composable Protocol
type: preprint
user_id: '41047'
year: '2025'
...
---
_id: '63434'
author:
- first_name: Max
full_name: Hoffmann, Max
last_name: Hoffmann
citation:
ama: 'Hoffmann M. Using scriptwriting as a response format for interface tasks:
Exemplary analyses in the context of symmetry. In: Bosch M, Bolondi G, Carreira
S, Michael G, Camilla S, eds. Proceedings of the Fourteenth Congress of the
European Society for Research in Mathematics Education (CERME14). ; 2025.'
apa: 'Hoffmann, M. (2025). Using scriptwriting as a response format for interface
tasks: Exemplary analyses in the context of symmetry. In M. Bosch, G. Bolondi,
S. Carreira, G. Michael, & S. Camilla (Eds.), Proceedings of the Fourteenth
Congress of the European Society for Research in Mathematics Education (CERME14).'
bibtex: '@inproceedings{Hoffmann_2025, title={Using scriptwriting as a response
format for interface tasks: Exemplary analyses in the context of symmetry}, booktitle={Proceedings
of the Fourteenth Congress of the European Society for Research in Mathematics
Education (CERME14)}, author={Hoffmann, Max}, editor={Bosch, Marianna and Bolondi,
Giorgio and Carreira, Susana and Michael, Gaidoschik and Camilla, Spagnolo}, year={2025}
}'
chicago: 'Hoffmann, Max. “Using Scriptwriting as a Response Format for Interface
Tasks: Exemplary Analyses in the Context of Symmetry.” In Proceedings of the
Fourteenth Congress of the European Society for Research in Mathematics Education
(CERME14), edited by Marianna Bosch, Giorgio Bolondi, Susana Carreira, Gaidoschik
Michael, and Spagnolo Camilla, 2025.'
ieee: 'M. Hoffmann, “Using scriptwriting as a response format for interface tasks:
Exemplary analyses in the context of symmetry,” in Proceedings of the Fourteenth
Congress of the European Society for Research in Mathematics Education (CERME14),
2025.'
mla: 'Hoffmann, Max. “Using Scriptwriting as a Response Format for Interface Tasks:
Exemplary Analyses in the Context of Symmetry.” Proceedings of the Fourteenth
Congress of the European Society for Research in Mathematics Education (CERME14),
edited by Marianna Bosch et al., 2025.'
short: 'M. Hoffmann, in: M. Bosch, G. Bolondi, S. Carreira, G. Michael, S. Camilla
(Eds.), Proceedings of the Fourteenth Congress of the European Society for Research
in Mathematics Education (CERME14), 2025.'
date_created: 2026-01-04T21:26:04Z
date_updated: 2026-01-04T21:29:36Z
department:
- _id: '97'
- _id: '643'
editor:
- first_name: Marianna
full_name: Bosch, Marianna
last_name: Bosch
- first_name: Giorgio
full_name: Bolondi, Giorgio
last_name: Bolondi
- first_name: Susana
full_name: Carreira, Susana
last_name: Carreira
- first_name: Gaidoschik
full_name: Michael, Gaidoschik
last_name: Michael
- first_name: Spagnolo
full_name: Camilla, Spagnolo
last_name: Camilla
keyword:
- hoffmann
- reviewed
- proceedings
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://hal.science/CERME14/hal-05237875v1
oa: '1'
publication: Proceedings of the Fourteenth Congress of the European Society for Research
in Mathematics Education (CERME14)
quality_controlled: '1'
status: public
title: 'Using scriptwriting as a response format for interface tasks: Exemplary analyses
in the context of symmetry'
type: conference
user_id: '32202'
year: '2025'
...
---
_id: '63433'
article_type: original
author:
- first_name: Max
full_name: Hoffmann, Max
id: '32202'
last_name: Hoffmann
orcid: 0000-0002-6964-7123
citation:
ama: Hoffmann M. Digitale Perspektiven auf das Heron-Verfahren. mathematik lehren.
2025;(253):39-44. doi:https://doi.org/10.5555/ml-253-2025_07
apa: Hoffmann, M. (2025). Digitale Perspektiven auf das Heron-Verfahren. mathematik
lehren, 253, 39–44. https://doi.org/10.5555/ml-253-2025_07
bibtex: '@article{Hoffmann_2025, title={Digitale Perspektiven auf das Heron-Verfahren},
DOI={https://doi.org/10.5555/ml-253-2025_07},
number={253}, journal={mathematik lehren}, author={Hoffmann, Max}, year={2025},
pages={39–44} }'
chicago: 'Hoffmann, Max. “Digitale Perspektiven auf das Heron-Verfahren.” mathematik
lehren, no. 253 (2025): 39–44. https://doi.org/10.5555/ml-253-2025_07.'
ieee: 'M. Hoffmann, “Digitale Perspektiven auf das Heron-Verfahren,” mathematik
lehren, no. 253, pp. 39–44, 2025, doi: https://doi.org/10.5555/ml-253-2025_07.'
mla: Hoffmann, Max. “Digitale Perspektiven auf das Heron-Verfahren.” mathematik
lehren, no. 253, 2025, pp. 39–44, doi:https://doi.org/10.5555/ml-253-2025_07.
short: M. Hoffmann, mathematik lehren (2025) 39–44.
date_created: 2026-01-04T17:37:54Z
date_updated: 2026-01-04T17:38:00Z
department:
- _id: '97'
- _id: '643'
doi: https://doi.org/10.5555/ml-253-2025_07
issue: '253'
language:
- iso: ger
page: 39-44
popular_science: '1'
publication: mathematik lehren
publication_status: published
status: public
title: Digitale Perspektiven auf das Heron-Verfahren
type: journal_article
user_id: '32202'
year: '2025'
...
---
_id: '62000'
article_type: original
author:
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Kevin
full_name: Koch, Kevin
last_name: Koch
- first_name: Olga
full_name: Friesen, Olga
id: '44026'
last_name: Friesen
- first_name: Lars
full_name: Meihost, Lars
id: '24769'
last_name: Meihost
citation:
ama: Claes L, Koch K, Friesen O, Meihost L. Machine Learning-Supported Inverse Measurement
Procedure for Broadband, Temperature Dependent Piezoelectric Material Parameters.
Acta Acustica. 2025;9(65). doi:10.1051/aacus/2025044
apa: Claes, L., Koch, K., Friesen, O., & Meihost, L. (2025). Machine Learning-Supported
Inverse Measurement Procedure for Broadband, Temperature Dependent Piezoelectric
Material Parameters. Acta Acustica, 9(65). https://doi.org/10.1051/aacus/2025044
bibtex: '@article{Claes_Koch_Friesen_Meihost_2025, title={Machine Learning-Supported
Inverse Measurement Procedure for Broadband, Temperature Dependent Piezoelectric
Material Parameters}, volume={9}, DOI={10.1051/aacus/2025044},
number={65}, journal={Acta Acustica}, publisher={EDP Sciences}, author={Claes,
Leander and Koch, Kevin and Friesen, Olga and Meihost, Lars}, year={2025} }'
chicago: Claes, Leander, Kevin Koch, Olga Friesen, and Lars Meihost. “Machine Learning-Supported
Inverse Measurement Procedure for Broadband, Temperature Dependent Piezoelectric
Material Parameters.” Acta Acustica 9, no. 65 (2025). https://doi.org/10.1051/aacus/2025044.
ieee: 'L. Claes, K. Koch, O. Friesen, and L. Meihost, “Machine Learning-Supported
Inverse Measurement Procedure for Broadband, Temperature Dependent Piezoelectric
Material Parameters,” Acta Acustica, vol. 9, no. 65, 2025, doi: 10.1051/aacus/2025044.'
mla: Claes, Leander, et al. “Machine Learning-Supported Inverse Measurement Procedure
for Broadband, Temperature Dependent Piezoelectric Material Parameters.” Acta
Acustica, vol. 9, no. 65, EDP Sciences, 2025, doi:10.1051/aacus/2025044.
short: L. Claes, K. Koch, O. Friesen, L. Meihost, Acta Acustica 9 (2025).
date_created: 2025-10-27T08:20:53Z
date_updated: 2026-01-05T08:00:05Z
department:
- _id: '49'
doi: 10.1051/aacus/2025044
intvolume: ' 9'
issue: '65'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://acta-acustica.edpsciences.org/articles/aacus/abs/2025/01/aacus250049/aacus250049.html
oa: '1'
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
publication: Acta Acustica
publication_identifier:
issn:
- 2681-4617
publication_status: published
publisher: EDP Sciences
status: public
title: Machine Learning-Supported Inverse Measurement Procedure for Broadband, Temperature
Dependent Piezoelectric Material Parameters
type: journal_article
user_id: '11829'
volume: 9
year: '2025'
...
---
_id: '54837'
author:
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Johannes
full_name: Lankeit, Johannes
last_name: Lankeit
- first_name: Michael
full_name: Winkler, Michael
id: '31496'
last_name: Winkler
citation:
ama: 'Claes L, Lankeit J, Winkler M. A model for heat generation by acoustic waves
in piezoelectric materials: Global large-data solutions. Mathematical Models
and Methods in Applied Sciences. 2025;35(11):2465-2512. doi:10.1142/s0218202525500447'
apa: 'Claes, L., Lankeit, J., & Winkler, M. (2025). A model for heat generation
by acoustic waves in piezoelectric materials: Global large-data solutions. Mathematical
Models and Methods in Applied Sciences, 35(11), 2465–2512. https://doi.org/10.1142/s0218202525500447'
bibtex: '@article{Claes_Lankeit_Winkler_2025, title={A model for heat generation
by acoustic waves in piezoelectric materials: Global large-data solutions}, volume={35},
DOI={10.1142/s0218202525500447},
number={11}, journal={Mathematical Models and Methods in Applied Sciences}, publisher={World
Scientific Pub Co Pte Ltd}, author={Claes, Leander and Lankeit, Johannes and Winkler,
Michael}, year={2025}, pages={2465–2512} }'
chicago: 'Claes, Leander, Johannes Lankeit, and Michael Winkler. “A Model for Heat
Generation by Acoustic Waves in Piezoelectric Materials: Global Large-Data Solutions.”
Mathematical Models and Methods in Applied Sciences 35, no. 11 (2025):
2465–2512. https://doi.org/10.1142/s0218202525500447.'
ieee: 'L. Claes, J. Lankeit, and M. Winkler, “A model for heat generation by acoustic
waves in piezoelectric materials: Global large-data solutions,” Mathematical
Models and Methods in Applied Sciences, vol. 35, no. 11, pp. 2465–2512, 2025,
doi: 10.1142/s0218202525500447.'
mla: 'Claes, Leander, et al. “A Model for Heat Generation by Acoustic Waves in Piezoelectric
Materials: Global Large-Data Solutions.” Mathematical Models and Methods in
Applied Sciences, vol. 35, no. 11, World Scientific Pub Co Pte Ltd, 2025,
pp. 2465–512, doi:10.1142/s0218202525500447.'
short: L. Claes, J. Lankeit, M. Winkler, Mathematical Models and Methods in Applied
Sciences 35 (2025) 2465–2512.
date_created: 2024-06-20T13:43:42Z
date_updated: 2026-01-05T07:59:41Z
department:
- _id: '90'
- _id: '49'
doi: 10.1142/s0218202525500447
external_id:
arxiv:
- '2411.14900'
intvolume: ' 35'
issue: '11'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/pdf/2411.14900
oa: '1'
page: 2465-2512
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
publication: Mathematical Models and Methods in Applied Sciences
publication_identifier:
issn:
- 1793-6314
publisher: World Scientific Pub Co Pte Ltd
status: public
title: 'A model for heat generation by acoustic waves in piezoelectric materials:
Global large-data solutions'
type: journal_article
user_id: '11829'
volume: 35
year: '2025'
...
---
_id: '62299'
author:
- first_name: Olga
full_name: Friesen, Olga
id: '44026'
last_name: Friesen
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Friesen O, Scheidemann C, Claes L, Hemsel T, Henning B. Sensitivity Analysis
and Material Parameter Estimation of a Pre-Stressed Langevin Transducer. In: 2025
International Congress on Ultrasonics. AMA Service GmbH; 2025:138–141. doi:10.5162/ultrasonic2025/a18-a4'
apa: Friesen, O., Scheidemann, C., Claes, L., Hemsel, T., & Henning, B. (2025).
Sensitivity Analysis and Material Parameter Estimation of a Pre-Stressed Langevin
Transducer. 2025 International Congress on Ultrasonics, 138–141. https://doi.org/10.5162/ultrasonic2025/a18-a4
bibtex: '@inproceedings{Friesen_Scheidemann_Claes_Hemsel_Henning_2025, place={Paderborn},
title={Sensitivity Analysis and Material Parameter Estimation of a Pre-Stressed
Langevin Transducer}, DOI={10.5162/ultrasonic2025/a18-a4},
booktitle={2025 International Congress on Ultrasonics}, publisher={AMA Service
GmbH}, author={Friesen, Olga and Scheidemann, Claus and Claes, Leander and Hemsel,
Tobias and Henning, Bernd}, year={2025}, pages={138–141} }'
chicago: 'Friesen, Olga, Claus Scheidemann, Leander Claes, Tobias Hemsel, and Bernd
Henning. “Sensitivity Analysis and Material Parameter Estimation of a Pre-Stressed
Langevin Transducer.” In 2025 International Congress on Ultrasonics, 138–141.
Paderborn: AMA Service GmbH, 2025. https://doi.org/10.5162/ultrasonic2025/a18-a4.'
ieee: 'O. Friesen, C. Scheidemann, L. Claes, T. Hemsel, and B. Henning, “Sensitivity
Analysis and Material Parameter Estimation of a Pre-Stressed Langevin Transducer,”
in 2025 International Congress on Ultrasonics, 2025, pp. 138–141, doi:
10.5162/ultrasonic2025/a18-a4.'
mla: Friesen, Olga, et al. “Sensitivity Analysis and Material Parameter Estimation
of a Pre-Stressed Langevin Transducer.” 2025 International Congress on Ultrasonics,
AMA Service GmbH, 2025, pp. 138–141, doi:10.5162/ultrasonic2025/a18-a4.
short: 'O. Friesen, C. Scheidemann, L. Claes, T. Hemsel, B. Henning, in: 2025 International
Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 138–141.'
date_created: 2025-11-25T12:23:06Z
date_updated: 2026-01-05T08:00:48Z
department:
- _id: '49'
- _id: '151'
doi: 10.5162/ultrasonic2025/a18-a4
language:
- iso: eng
page: 138–141
place: Paderborn
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
publication: 2025 International Congress on Ultrasonics
publisher: AMA Service GmbH
status: public
title: Sensitivity Analysis and Material Parameter Estimation of a Pre-Stressed Langevin
Transducer
type: conference
user_id: '11829'
year: '2025'
...
---
_id: '62298'
author:
- first_name: Raphael
full_name: Kuess, Raphael
last_name: Kuess
- first_name: Olga
full_name: Friesen, Olga
id: '44026'
last_name: Friesen
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
- first_name: Andrea
full_name: Walther, Andrea
last_name: Walther
citation:
ama: 'Kuess R, Friesen O, Henning B, Walther A. Identification of temperature-dependent
material parameter functions in piezoelectricity. In: 2025 International Congress
on Ultrasonics. AMA Service GmbH; 2025:134–137. doi:10.5162/ultrasonic2025/a18-a3'
apa: Kuess, R., Friesen, O., Henning, B., & Walther, A. (2025). Identification
of temperature-dependent material parameter functions in piezoelectricity. 2025
International Congress on Ultrasonics, 134–137. https://doi.org/10.5162/ultrasonic2025/a18-a3
bibtex: '@inproceedings{Kuess_Friesen_Henning_Walther_2025, place={Germany}, title={Identification
of temperature-dependent material parameter functions in piezoelectricity}, DOI={10.5162/ultrasonic2025/a18-a3},
booktitle={2025 International Congress on Ultrasonics}, publisher={AMA Service
GmbH}, author={Kuess, Raphael and Friesen, Olga and Henning, Bernd and Walther,
Andrea}, year={2025}, pages={134–137} }'
chicago: 'Kuess, Raphael, Olga Friesen, Bernd Henning, and Andrea Walther. “Identification
of Temperature-Dependent Material Parameter Functions in Piezoelectricity.” In
2025 International Congress on Ultrasonics, 134–137. Germany: AMA Service
GmbH, 2025. https://doi.org/10.5162/ultrasonic2025/a18-a3.'
ieee: 'R. Kuess, O. Friesen, B. Henning, and A. Walther, “Identification of temperature-dependent
material parameter functions in piezoelectricity,” in 2025 International Congress
on Ultrasonics, 2025, pp. 134–137, doi: 10.5162/ultrasonic2025/a18-a3.'
mla: Kuess, Raphael, et al. “Identification of Temperature-Dependent Material Parameter
Functions in Piezoelectricity.” 2025 International Congress on Ultrasonics,
AMA Service GmbH, 2025, pp. 134–137, doi:10.5162/ultrasonic2025/a18-a3.
short: 'R. Kuess, O. Friesen, B. Henning, A. Walther, in: 2025 International Congress
on Ultrasonics, AMA Service GmbH, Germany, 2025, pp. 134–137.'
date_created: 2025-11-25T12:23:06Z
date_updated: 2026-01-05T08:01:47Z
department:
- _id: '49'
doi: 10.5162/ultrasonic2025/a18-a3
language:
- iso: eng
page: 134–137
place: Germany
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
publication: 2025 International Congress on Ultrasonics
publisher: AMA Service GmbH
status: public
title: Identification of temperature-dependent material parameter functions in piezoelectricity
type: conference
user_id: '11829'
year: '2025'
...
---
_id: '59689'
author:
- first_name: Olga
full_name: Friesen, Olga
id: '44026'
last_name: Friesen
- first_name: Lars
full_name: Meihost, Lars
id: '24769'
last_name: Meihost
- first_name: Kevin
full_name: Koch, Kevin
last_name: Koch
- 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, Meihost L, Koch K, Claes L, Henning B. Estimation of piezoelectric
material parameters under varying electric field conditions. In: ; 2025. doi:10.71568/DASDAGA2025.078'
apa: Friesen, O., Meihost, L., Koch, K., Claes, L., & Henning, B. (2025). Estimation
of piezoelectric material parameters under varying electric field conditions.
DAS | DAGA 2025 - 51st Annual Meeting on Acoustics, Copenhagen. https://doi.org/10.71568/DASDAGA2025.078
bibtex: '@inproceedings{Friesen_Meihost_Koch_Claes_Henning_2025, title={Estimation
of piezoelectric material parameters under varying electric field conditions},
DOI={10.71568/DASDAGA2025.078},
author={Friesen, Olga and Meihost, Lars and Koch, Kevin and Claes, Leander and
Henning, Bernd}, year={2025} }'
chicago: Friesen, Olga, Lars Meihost, Kevin Koch, Leander Claes, and Bernd Henning.
“Estimation of Piezoelectric Material Parameters under Varying Electric Field
Conditions,” 2025. https://doi.org/10.71568/DASDAGA2025.078.
ieee: 'O. Friesen, L. Meihost, K. Koch, L. Claes, and B. Henning, “Estimation of
piezoelectric material parameters under varying electric field conditions,” presented
at the DAS | DAGA 2025 - 51st Annual Meeting on Acoustics, Copenhagen, 2025, doi:
10.71568/DASDAGA2025.078.'
mla: Friesen, Olga, et al. Estimation of Piezoelectric Material Parameters under
Varying Electric Field Conditions. 2025, doi:10.71568/DASDAGA2025.078.
short: 'O. Friesen, L. Meihost, K. Koch, L. Claes, B. Henning, in: 2025.'
conference:
end_date: 2025-03-20
location: Copenhagen
name: DAS | DAGA 2025 - 51st Annual Meeting on Acoustics
start_date: 2025-03-17
date_created: 2025-04-25T08:51:32Z
date_updated: 2026-01-05T08:02:20Z
department:
- _id: '49'
doi: 10.71568/DASDAGA2025.078
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
status: public
title: Estimation of piezoelectric material parameters under varying electric field
conditions
type: conference
user_id: '11829'
year: '2025'
...
---
_id: '62174'
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: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Meise AT, Cord-Landwehr T, Haeb-Umbach R. On the Application of Diffusion
Models for Simultaneous Denoising and Dereverberation. In: ITG Conference
on Speech Communication. ; 2025.'
apa: Meise, A. T., Cord-Landwehr, T., & Haeb-Umbach, R. (2025). On the Application
of Diffusion Models for Simultaneous Denoising and Dereverberation. ITG Conference
on Speech Communication. ITG Conference on Speech Communication, Berlin.
bibtex: '@inproceedings{Meise_Cord-Landwehr_Haeb-Umbach_2025, title={On the Application
of Diffusion Models for Simultaneous Denoising and Dereverberation}, booktitle={
ITG Conference on Speech Communication}, author={Meise, Adrian Tobias and Cord-Landwehr,
Tobias and Haeb-Umbach, Reinhold}, year={2025} }'
chicago: Meise, Adrian Tobias, Tobias Cord-Landwehr, and Reinhold Haeb-Umbach. “On
the Application of Diffusion Models for Simultaneous Denoising and Dereverberation.”
In ITG Conference on Speech Communication, 2025.
ieee: A. T. Meise, T. Cord-Landwehr, and R. Haeb-Umbach, “On the Application of
Diffusion Models for Simultaneous Denoising and Dereverberation,” presented at
the ITG Conference on Speech Communication, Berlin, 2025.
mla: Meise, Adrian Tobias, et al. “On the Application of Diffusion Models for Simultaneous
Denoising and Dereverberation.” ITG Conference on Speech Communication,
2025.
short: 'A.T. Meise, T. Cord-Landwehr, R. Haeb-Umbach, in: ITG Conference on Speech
Communication, 2025.'
conference:
location: Berlin
name: ITG Conference on Speech Communication
date_created: 2025-11-13T07:21:51Z
date_updated: 2026-01-05T09:05:14Z
department:
- _id: '54'
language:
- iso: eng
publication: ' ITG Conference on Speech Communication'
publication_identifier:
isbn:
- 978-3-8007-6617-8
status: public
title: On the Application of Diffusion Models for Simultaneous Denoising and Dereverberation
type: conference
user_id: '44393'
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: '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: '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: '53414'
abstract:
- lang: eng
text: "By constructing a non-empty domain of discontinuity in a suitable homogeneous\r\nspace,
we prove that every torsion-free projective Anosov subgroup is the\r\nmonodromy
group of a locally homogeneous contact Axiom A dynamical system with\r\na unique
basic hyperbolic set on which the flow is conjugate to the refraction\r\nflow
of Sambarino. Under the assumption of irreducibility, we utilize the work\r\nof
Stoyanov to establish spectral estimates for the associated complex Ruelle\r\ntransfer
operators, and by way of corollary: exponential mixing, exponentially\r\ndecaying
error term in the prime orbit theorem, and a spectral gap for the\r\nRuelle zeta
function. With no irreducibility assumption, results of\r\nDyatlov-Guillarmou
imply the global meromorphic continuation of zeta functions\r\nwith smooth weights,
as well as the existence of a discrete spectrum of\r\nRuelle-Pollicott resonances
and (co)-resonant states. We apply our results to\r\nspace-like geodesic flows
for the convex cocompact pseudo-Riemannian manifolds\r\nof Danciger-Gu\\'eritaud-Kassel,
and the Benoist-Hilbert geodesic flow for\r\nstrictly convex real projective manifolds."
article_type: original
author:
- first_name: Benjamin
full_name: Delarue, Benjamin
id: '70575'
last_name: Delarue
- first_name: Daniel
full_name: Monclair, Daniel
last_name: Monclair
- first_name: Andrew
full_name: Sanders, Andrew
last_name: Sanders
citation:
ama: 'Delarue B, Monclair D, Sanders A. Locally homogeneous Axiom A flows I: projective
Anosov subgroups and exponential mixing. Geometric and Functional Analysis
(GAFA). 2025;35:673–735. doi:10.1007/s00039-025-00712-2'
apa: 'Delarue, B., Monclair, D., & Sanders, A. (2025). Locally homogeneous Axiom
A flows I: projective Anosov subgroups and exponential mixing. Geometric and
Functional Analysis (GAFA), 35, 673–735. https://doi.org/10.1007/s00039-025-00712-2'
bibtex: '@article{Delarue_Monclair_Sanders_2025, title={Locally homogeneous Axiom
A flows I: projective Anosov subgroups and exponential mixing}, volume={35}, DOI={10.1007/s00039-025-00712-2},
journal={Geometric and Functional Analysis (GAFA)}, author={Delarue, Benjamin
and Monclair, Daniel and Sanders, Andrew}, year={2025}, pages={673–735} }'
chicago: 'Delarue, Benjamin, Daniel Monclair, and Andrew Sanders. “Locally Homogeneous
Axiom A Flows I: Projective Anosov Subgroups and Exponential Mixing.” Geometric
and Functional Analysis (GAFA) 35 (2025): 673–735. https://doi.org/10.1007/s00039-025-00712-2.'
ieee: 'B. Delarue, D. Monclair, and A. Sanders, “Locally homogeneous Axiom A flows
I: projective Anosov subgroups and exponential mixing,” Geometric and Functional
Analysis (GAFA), vol. 35, pp. 673–735, 2025, doi: 10.1007/s00039-025-00712-2.'
mla: 'Delarue, Benjamin, et al. “Locally Homogeneous Axiom A Flows I: Projective
Anosov Subgroups and Exponential Mixing.” Geometric and Functional Analysis
(GAFA), vol. 35, 2025, pp. 673–735, doi:10.1007/s00039-025-00712-2.'
short: B. Delarue, D. Monclair, A. Sanders, Geometric and Functional Analysis (GAFA)
35 (2025) 673–735.
date_created: 2024-04-11T12:31:34Z
date_updated: 2026-01-09T09:25:45Z
department:
- _id: '548'
doi: 10.1007/s00039-025-00712-2
intvolume: ' 35'
language:
- iso: eng
page: 673–735
publication: Geometric and Functional Analysis (GAFA)
publication_status: published
status: public
title: 'Locally homogeneous Axiom A flows I: projective Anosov subgroups and exponential
mixing'
type: journal_article
user_id: '70575'
volume: 35
year: '2025'
...
---
_id: '53412'
abstract:
- lang: eng
text: "Let $M$ be a symplectic manifold carrying a Hamiltonian $S^1$-action with\r\nmomentum
map $J:M \\rightarrow \\mathbb{R}$ and consider the corresponding\r\nsymplectic
quotient $\\mathcal{M}_0:=J^{-1}(0)/S^1$. We extend Sjamaar's complex\r\nof differential
forms on $\\mathcal{M}_0$, whose cohomology is isomorphic to the\r\nsingular cohomology
$H(\\mathcal{M}_0;\\mathbb{R})$ of $\\mathcal{M}_0$ with real\r\ncoefficients,
to a complex of differential forms on $\\mathcal{M}_0$ associated\r\nwith a partial
desingularization $\\widetilde{\\mathcal{M}}_0$, which we call\r\nresolution differential
forms. The cohomology of that complex turns out to be\r\nisomorphic to the de
Rham cohomology $H(\\widetilde{ \\mathcal{M}}_0)$ of\r\n$\\widetilde{\\mathcal{M}}_0$.
Based on this, we derive a long exact sequence\r\ninvolving both $H(\\mathcal{M}_0;\\mathbb{R})$
and $H(\\widetilde{\r\n\\mathcal{M}}_0)$ and give conditions for its splitting.
We then define a Kirwan\r\nmap $\\mathcal{K}:H_{S^1}(M) \\rightarrow H(\\widetilde{\\mathcal{M}}_0)$
from the\r\nequivariant cohomology $H_{S^1}(M)$ of $M$ to $H(\\widetilde{\\mathcal{M}}_0)$\r\nand
show that its image contains the image of $H(\\mathcal{M}_0;\\mathbb{R})$ in\r\n$H(\\widetilde{\\mathcal{M}}_0)$
under the natural inclusion. Combining both\r\nresults in the case that all fixed
point components of $M$ have vanishing odd\r\ncohomology we obtain a surjection
$\\check \\kappa:H^\\textrm{ev}_{S^1}(M)\r\n\\rightarrow H^\\textrm{ev}(\\mathcal{M}_0;\\mathbb{R})$
in even degrees, while\r\nalready simple examples show that a similar surjection
in odd degrees does not\r\nexist in general. As an interesting class of examples
we study abelian polygon\r\nspaces."
article_type: original
author:
- first_name: Benjamin
full_name: Delarue, Benjamin
id: '70575'
last_name: Delarue
- first_name: Pablo
full_name: Ramacher, Pablo
last_name: Ramacher
- first_name: Maximilian
full_name: Schmitt, Maximilian
last_name: Schmitt
citation:
ama: Delarue B, Ramacher P, Schmitt M. Singular cohomology of symplectic quotients
by circle actions and Kirwan surjectivity. Transformation Groups. Published
online 2025. doi:10.1007/s00031-025-09924-0
apa: Delarue, B., Ramacher, P., & Schmitt, M. (2025). Singular cohomology of
symplectic quotients by circle actions and Kirwan surjectivity. Transformation
Groups. https://doi.org/10.1007/s00031-025-09924-0
bibtex: '@article{Delarue_Ramacher_Schmitt_2025, title={Singular cohomology of symplectic
quotients by circle actions and Kirwan surjectivity}, DOI={10.1007/s00031-025-09924-0},
journal={Transformation Groups}, author={Delarue, Benjamin and Ramacher, Pablo
and Schmitt, Maximilian}, year={2025} }'
chicago: Delarue, Benjamin, Pablo Ramacher, and Maximilian Schmitt. “Singular Cohomology
of Symplectic Quotients by Circle Actions and Kirwan Surjectivity.” Transformation
Groups, 2025. https://doi.org/10.1007/s00031-025-09924-0.
ieee: 'B. Delarue, P. Ramacher, and M. Schmitt, “Singular cohomology of symplectic
quotients by circle actions and Kirwan surjectivity,” Transformation Groups,
2025, doi: 10.1007/s00031-025-09924-0.'
mla: Delarue, Benjamin, et al. “Singular Cohomology of Symplectic Quotients by Circle
Actions and Kirwan Surjectivity.” Transformation Groups, 2025, doi:10.1007/s00031-025-09924-0.
short: B. Delarue, P. Ramacher, M. Schmitt, Transformation Groups (2025).
date_created: 2024-04-11T12:30:59Z
date_updated: 2026-01-09T09:27:08Z
department:
- _id: '548'
doi: 10.1007/s00031-025-09924-0
language:
- iso: eng
publication: Transformation Groups
publication_status: epub_ahead
status: public
title: Singular cohomology of symplectic quotients by circle actions and Kirwan surjectivity
type: journal_article
user_id: '70575'
year: '2025'
...
---
_id: '63543'
abstract:
- lang: eng
text: "Abstract\r\n Current megatrends
are influencing industrial production and leading to ever shorter innovation cycles.
The resulting fast pace of production requirements requires an accelerated development
of production systems and an associated increase in efficiency in factory planning.
Due to its knowledge-intensive activities, rough factory planning promises great
potential to be supported in its activities by innovative technologies such as
artificial intelligence. However, industrial companies face the challenge to recognize
the potential of artificial intelligence (AI) in rough planning and to evaluate
possible applications in their business context. As a result, a systematic approach
for analyzing AI potential in rough factory planning was developed as part of
this work. The system includes a procedural model and several artefacts used in
it, which support the identification and evaluation of AI potential in organizations.
This approach not only streamlines the planning process but also aligns with sustainable
manufacturing principles by enhancing resource efficiency, promoting intelligent
system design, and fostering innovation in product development and manufacturing
processes."
author:
- first_name: Dominik
full_name: Kürpick, Dominik
last_name: Kürpick
- first_name: Jan-Philipp
full_name: Disselkamp, Jan-Philipp
last_name: Disselkamp
- first_name: Jonas
full_name: Lick, Jonas
last_name: Lick
- first_name: Aschot
full_name: Hovemann, Aschot
last_name: Hovemann
- first_name: Roman
full_name: Dumitrescu, Roman
id: '16190'
last_name: Dumitrescu
citation:
ama: 'Kürpick D, Disselkamp J-P, Lick J, Hovemann A, Dumitrescu R. Systematic AI
Potential Analysis for Sustainable Rough Factory Planning. In: Lecture Notes
in Mechanical Engineering. Springer Nature Switzerland; 2025. doi:10.1007/978-3-031-93891-7_84'
apa: Kürpick, D., Disselkamp, J.-P., Lick, J., Hovemann, A., & Dumitrescu, R.
(2025). Systematic AI Potential Analysis for Sustainable Rough Factory Planning.
In Lecture Notes in Mechanical Engineering. Springer Nature Switzerland.
https://doi.org/10.1007/978-3-031-93891-7_84
bibtex: '@inbook{Kürpick_Disselkamp_Lick_Hovemann_Dumitrescu_2025, place={Cham},
title={Systematic AI Potential Analysis for Sustainable Rough Factory Planning},
DOI={10.1007/978-3-031-93891-7_84},
booktitle={Lecture Notes in Mechanical Engineering}, publisher={Springer Nature
Switzerland}, author={Kürpick, Dominik and Disselkamp, Jan-Philipp and Lick, Jonas
and Hovemann, Aschot and Dumitrescu, Roman}, year={2025} }'
chicago: 'Kürpick, Dominik, Jan-Philipp Disselkamp, Jonas Lick, Aschot Hovemann,
and Roman Dumitrescu. “Systematic AI Potential Analysis for Sustainable Rough
Factory Planning.” In Lecture Notes in Mechanical Engineering. Cham: Springer
Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-93891-7_84.'
ieee: 'D. Kürpick, J.-P. Disselkamp, J. Lick, A. Hovemann, and R. Dumitrescu, “Systematic
AI Potential Analysis for Sustainable Rough Factory Planning,” in Lecture Notes
in Mechanical Engineering, Cham: Springer Nature Switzerland, 2025.'
mla: Kürpick, Dominik, et al. “Systematic AI Potential Analysis for Sustainable
Rough Factory Planning.” Lecture Notes in Mechanical Engineering, Springer
Nature Switzerland, 2025, doi:10.1007/978-3-031-93891-7_84.
short: 'D. Kürpick, J.-P. Disselkamp, J. Lick, A. Hovemann, R. Dumitrescu, in: Lecture
Notes in Mechanical Engineering, Springer Nature Switzerland, Cham, 2025.'
date_created: 2026-01-09T13:17:31Z
date_updated: 2026-01-09T13:18:45Z
department:
- _id: '563'
doi: 10.1007/978-3-031-93891-7_84
language:
- iso: eng
place: Cham
publication: Lecture Notes in Mechanical Engineering
publication_identifier:
isbn:
- '9783031938900'
- '9783031938917'
issn:
- 2195-4356
- 2195-4364
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: Systematic AI Potential Analysis for Sustainable Rough Factory Planning
type: book_chapter
user_id: '15782'
year: '2025'
...
---
_id: '63542'
abstract:
- lang: eng
text: ABSTRACT:This paper presents the MBSE-Graph-RAG
framework to address key challenges in Model-Based Systems Engineering (MBSE).
Traditional MBSE tools suffer from usability barriers, limited accessibility,
and integration challenges. By combining knowledge graphs with Retrieval-Augmented
Generation (RAG), the proposed framework enables AI-Augmented engineering through
natural language interactions and automated system architecture generation. A
systematic literature review establishes a solid research foundation, identifying
gaps in AI-assisted MBSE. Key contributions include a structured MBSE-Graph interface,
improved usability via Large Language Models (LLMs), and automated graph construction
aligned with SysML. A proof-of-concept demonstrates the potential of this approach
to enhance MBSE by reducing complexity, improving data accessibility, and supporting
engineering collaboration.
author:
- first_name: Fabian
full_name: Hanke, Fabian
last_name: Hanke
- first_name: Isaac Mpidi
full_name: Bita, Isaac Mpidi
last_name: Bita
- first_name: 'Oliver '
full_name: 'von Heißen, Oliver '
last_name: von Heißen
- first_name: Julian
full_name: Weller, Julian
last_name: Weller
- first_name: Aschot
full_name: Hovemann, Aschot
last_name: Hovemann
- first_name: Roman
full_name: Dumitrescu, Roman
id: '16190'
last_name: Dumitrescu
citation:
ama: 'Hanke F, Bita IM, von Heißen O, Weller J, Hovemann A, Dumitrescu R. AI-augmented
systems engineering: conceptual application of retrieval-augmented generation
for model-based systems engineering graph. In: Proceedings of the Design Society.
Vol 5. Cambridge University Press (CUP); 2025:439-448. doi:10.1017/pds.2025.10058'
apa: 'Hanke, F., Bita, I. M., von Heißen, O., Weller, J., Hovemann, A., & Dumitrescu,
R. (2025). AI-augmented systems engineering: conceptual application of retrieval-augmented
generation for model-based systems engineering graph. Proceedings of the Design
Society, 5, 439–448. https://doi.org/10.1017/pds.2025.10058'
bibtex: '@inproceedings{Hanke_Bita_von Heißen_Weller_Hovemann_Dumitrescu_2025, title={AI-augmented
systems engineering: conceptual application of retrieval-augmented generation
for model-based systems engineering graph}, volume={5}, DOI={10.1017/pds.2025.10058},
booktitle={Proceedings of the Design Society}, publisher={Cambridge University
Press (CUP)}, author={Hanke, Fabian and Bita, Isaac Mpidi and von Heißen, Oliver and
Weller, Julian and Hovemann, Aschot and Dumitrescu, Roman}, year={2025}, pages={439–448}
}'
chicago: 'Hanke, Fabian, Isaac Mpidi Bita, Oliver von Heißen, Julian Weller, Aschot
Hovemann, and Roman Dumitrescu. “AI-Augmented Systems Engineering: Conceptual
Application of Retrieval-Augmented Generation for Model-Based Systems Engineering
Graph.” In Proceedings of the Design Society, 5:439–48. Cambridge University
Press (CUP), 2025. https://doi.org/10.1017/pds.2025.10058.'
ieee: 'F. Hanke, I. M. Bita, O. von Heißen, J. Weller, A. Hovemann, and R. Dumitrescu,
“AI-augmented systems engineering: conceptual application of retrieval-augmented
generation for model-based systems engineering graph,” in Proceedings of the
Design Society, 2025, vol. 5, pp. 439–448, doi: 10.1017/pds.2025.10058.'
mla: 'Hanke, Fabian, et al. “AI-Augmented Systems Engineering: Conceptual Application
of Retrieval-Augmented Generation for Model-Based Systems Engineering Graph.”
Proceedings of the Design Society, vol. 5, Cambridge University Press (CUP),
2025, pp. 439–48, doi:10.1017/pds.2025.10058.'
short: 'F. Hanke, I.M. Bita, O. von Heißen, J. Weller, A. Hovemann, R. Dumitrescu,
in: Proceedings of the Design Society, Cambridge University Press (CUP), 2025,
pp. 439–448.'
date_created: 2026-01-09T13:12:15Z
date_updated: 2026-01-09T13:14:20Z
department:
- _id: '563'
doi: 10.1017/pds.2025.10058
intvolume: ' 5'
language:
- iso: eng
page: 439-448
publication: Proceedings of the Design Society
publication_identifier:
issn:
- 2732-527X
publication_status: published
publisher: Cambridge University Press (CUP)
status: public
title: 'AI-augmented systems engineering: conceptual application of retrieval-augmented
generation for model-based systems engineering graph'
type: conference
user_id: '15782'
volume: 5
year: '2025'
...