---
_id: '64793'
abstract:
- lang: eng
text: The article explores the role of teachers in self-directed songwriting in
school music based on the informal learning approach. It investigates a didactic
design that was implemented in six schools and was empirically researched utilizing
si-tuational analysis. Based on tensions, that emerge due to conflicting expectations,
it can be shown, that the teacher's role extends beyond the dichotomy of directive
instruction versus open facilitation. Instead, it encompasses an interplay of
six divergent roles which are discussed in their positions in relation to each
other. These considerations enrich the understanding of teaching practices in
popular music education, emphasizing the redefinition of teacher-student relationships
for song-writing in school music.
author:
- first_name: Marc
full_name: Godau, Marc
id: '98877'
last_name: Godau
- first_name: Julia
full_name: Barreiro, Julia
last_name: Barreiro
- first_name: Katharina
full_name: Hermann, Katharina
last_name: Hermann
- first_name: Timo
full_name: Neuhausen, Timo
id: '99991'
last_name: Neuhausen
orcid: 0000-0002-8262-767X
- first_name: Dominik
full_name: Maxelon, Dominik
last_name: Maxelon
- first_name: Verena
full_name: Weidner, Verena
last_name: Weidner
citation:
ama: 'Godau M, Barreiro J, Hermann K, Neuhausen T, Maxelon D, Weidner V. “Wofür
bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?” Zur
Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht. In: Frey-Konrad
U, Hofbauer VC, Blanchard O, Bugiel L, eds. 46. Jahresband des Arbeitskreises
Musikpädagogische Forschung/46th Yearbook of the German Association for Research
in Music Education. Waxmann; 2025. doi:10.31244/9783818850715.13'
apa: Godau, M., Barreiro, J., Hermann, K., Neuhausen, T., Maxelon, D., & Weidner,
V. (2025). “Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch
helfen kann?” Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht.
In U. Frey-Konrad, V. C. Hofbauer, O. Blanchard, & L. Bugiel (Eds.), 46.
Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the
German Association for Research in Music Education. Waxmann. https://doi.org/10.31244/9783818850715.13
bibtex: '@inbook{Godau_Barreiro_Hermann_Neuhausen_Maxelon_Weidner_2025, title={“Wofür
bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?” Zur
Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht}, DOI={10.31244/9783818850715.13},
booktitle={46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th
Yearbook of the German Association for Research in Music Education}, publisher={Waxmann},
author={Godau, Marc and Barreiro, Julia and Hermann, Katharina and Neuhausen,
Timo and Maxelon, Dominik and Weidner, Verena}, editor={Frey-Konrad, Ute and Hofbauer,
Viola Cäcilia and Blanchard, Olivier and Bugiel, Lukas}, year={2025} }'
chicago: Godau, Marc, Julia Barreiro, Katharina Hermann, Timo Neuhausen, Dominik
Maxelon, and Verena Weidner. “‘Wofür bin ich denn hier, wenn ich nicht in irgendeiner
Weise auch helfen kann?’ Zur Rolle der Lehrkraft beim selbstständigen Songwriting
im Unterricht.” In 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th
Yearbook of the German Association for Research in Music Education, edited
by Ute Frey-Konrad, Viola Cäcilia Hofbauer, Olivier Blanchard, and Lukas Bugiel.
Waxmann, 2025. https://doi.org/10.31244/9783818850715.13.
ieee: M. Godau, J. Barreiro, K. Hermann, T. Neuhausen, D. Maxelon, and V. Weidner,
“‘Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?’
Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht,” in 46.
Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the
German Association for Research in Music Education, U. Frey-Konrad, V. C.
Hofbauer, O. Blanchard, and L. Bugiel, Eds. Waxmann, 2025.
mla: Godau, Marc, et al. “‘Wofür bin ich denn hier, wenn ich nicht in irgendeiner
Weise auch helfen kann?’ Zur Rolle der Lehrkraft beim selbstständigen Songwriting
im Unterricht.” 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th
Yearbook of the German Association for Research in Music Education, edited
by Ute Frey-Konrad et al., Waxmann, 2025, doi:10.31244/9783818850715.13.
short: 'M. Godau, J. Barreiro, K. Hermann, T. Neuhausen, D. Maxelon, V. Weidner,
in: U. Frey-Konrad, V.C. Hofbauer, O. Blanchard, L. Bugiel (Eds.), 46. Jahresband
des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association
for Research in Music Education, Waxmann, 2025.'
date_created: 2026-02-28T09:50:45Z
date_updated: 2026-02-28T15:29:25Z
department:
- _id: '131'
- _id: '36'
- _id: '129'
- _id: '540'
doi: 10.31244/9783818850715.13
editor:
- first_name: Ute
full_name: Frey-Konrad, Ute
last_name: Frey-Konrad
- first_name: Viola Cäcilia
full_name: Hofbauer, Viola Cäcilia
last_name: Hofbauer
- first_name: Olivier
full_name: Blanchard, Olivier
last_name: Blanchard
- first_name: Lukas
full_name: Bugiel, Lukas
last_name: Bugiel
language:
- iso: ger
main_file_link:
- open_access: '1'
oa: '1'
publication: 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
of the German Association for Research in Music Education
publication_identifier:
isbn:
- '9783818800710'
publication_status: published
publisher: Waxmann
quality_controlled: '1'
status: public
title: '"Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen
kann?" Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht'
type: book_chapter
user_id: '99991'
year: '2025'
...
---
_id: '64792'
abstract:
- lang: eng
text: The role of institutionalized standards for the hybridization of musical practices.
On the socio-materiality of songwriting-producing in the bedroom studio This study
examines the socio-materiality of hybrid music practices in bedroom studios, focusing
on the interplay between traditional music education institutions and YouTube
education. A single case situational analysis reveals how standardized instrumental
and music production practices are combined to form a hybrid practice. It shows
that traditional music education institutions, such as music schools and conservatories,
specialize in the selection of chord tones, while You-Tube videos focus on sound
design. Using an actor-network theory approach, the study demonstrates the permeability
of informal and institutional learning spaces. The findings suggest that songwriting-producing
is not simply a sum of different practices, but rather a process of negotiation
and compromise between different standards and goals, as well as the distribution
of practice between humans and technology.
author:
- first_name: Timo
full_name: Neuhausen, Timo
id: '99991'
last_name: Neuhausen
orcid: 0000-0002-8262-767X
citation:
ama: 'Neuhausen T. Die Rolle institutionalisierter Standards für die Hybridisierung
musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio.
In: Frey-Konrad U, Hofbauer VC, Blanchard O, Bugiel L, eds. 46. Jahresband
Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association
for Research in Music Education. Waxmann; 2025. doi:10.31244/9783818850715.19'
apa: Neuhausen, T. (2025). Die Rolle institutionalisierter Standards für die Hybridisierung
musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio.
In U. Frey-Konrad, V. C. Hofbauer, O. Blanchard, & L. Bugiel (Eds.), 46.
Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the
German Association for Research in Music Education. Waxmann. https://doi.org/10.31244/9783818850715.19
bibtex: '@inbook{Neuhausen_2025, title={Die Rolle institutionalisierter Standards
für die Hybridisierung musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing
im Bedroom-Studio}, DOI={10.31244/9783818850715.19},
booktitle={46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th
Yearbook of the German Association for Research in Music Education}, publisher={Waxmann},
author={Neuhausen, Timo}, editor={Frey-Konrad, Ute and Hofbauer, Viola Cäcilia
and Blanchard, Olivier and Bugiel, Lukas}, year={2025} }'
chicago: Neuhausen, Timo. “Die Rolle Institutionalisierter Standards Für Die Hybridisierung
Musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing Im Bedroom-Studio.”
In 46. Jahresband Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
of the German Association for Research in Music Education, edited by Ute Frey-Konrad,
Viola Cäcilia Hofbauer, Olivier Blanchard, and Lukas Bugiel. Waxmann, 2025. https://doi.org/10.31244/9783818850715.19.
ieee: T. Neuhausen, “Die Rolle institutionalisierter Standards für die Hybridisierung
musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio,”
in 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
of the German Association for Research in Music Education, U. Frey-Konrad,
V. C. Hofbauer, O. Blanchard, and L. Bugiel, Eds. Waxmann, 2025.
mla: Neuhausen, Timo. “Die Rolle Institutionalisierter Standards Für Die Hybridisierung
Musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing Im Bedroom-Studio.”
46. Jahresband Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
of the German Association for Research in Music Education, edited by Ute Frey-Konrad
et al., Waxmann, 2025, doi:10.31244/9783818850715.19.
short: 'T. Neuhausen, in: U. Frey-Konrad, V.C. Hofbauer, O. Blanchard, L. Bugiel
(Eds.), 46. Jahresband Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
of the German Association for Research in Music Education, Waxmann, 2025.'
date_created: 2026-02-28T09:47:25Z
date_updated: 2026-02-28T15:28:48Z
department:
- _id: '131'
- _id: '36'
- _id: '129'
- _id: '540'
doi: 10.31244/9783818850715.19
editor:
- first_name: Ute
full_name: Frey-Konrad, Ute
last_name: Frey-Konrad
- first_name: Viola Cäcilia
full_name: Hofbauer, Viola Cäcilia
last_name: Hofbauer
- first_name: Olivier
full_name: Blanchard, Olivier
last_name: Blanchard
- first_name: Lukas
full_name: Bugiel, Lukas
last_name: Bugiel
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
publication: 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
of the German Association for Research in Music Education
publication_identifier:
isbn:
- '9783818800710'
publication_status: published
publisher: Waxmann
quality_controlled: '1'
status: public
title: Die Rolle institutionalisierter Standards für die Hybridisierung musikalischer
Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio
type: book_chapter
user_id: '99991'
year: '2025'
...
---
_id: '64795'
author:
- first_name: Marc
full_name: Ebert, Marc
id: '91897'
last_name: Ebert
- first_name: Katrin
full_name: Temmen, Katrin
id: '30086'
last_name: Temmen
citation:
ama: 'Ebert M, Temmen K. Über Rätsel zur Quantenphysik – Eine spielerische Heranführung
an ein abstraktes Thema. In: ; 2025.'
apa: Ebert, M., & Temmen, K. (2025). Über Rätsel zur Quantenphysik – Eine
spielerische Heranführung an ein abstraktes Thema. 20. LeLa-Jahrestagung,
Oldenburg.
bibtex: '@inproceedings{Ebert_Temmen_2025, title={Über Rätsel zur Quantenphysik
– Eine spielerische Heranführung an ein abstraktes Thema}, author={Ebert, Marc
and Temmen, Katrin}, year={2025} }'
chicago: Ebert, Marc, and Katrin Temmen. “Über Rätsel zur Quantenphysik – Eine spielerische
Heranführung an ein abstraktes Thema,” 2025.
ieee: M. Ebert and K. Temmen, “Über Rätsel zur Quantenphysik – Eine spielerische
Heranführung an ein abstraktes Thema,” presented at the 20. LeLa-Jahrestagung,
Oldenburg, 2025.
mla: Ebert, Marc, and Katrin Temmen. Über Rätsel zur Quantenphysik – Eine spielerische
Heranführung an ein abstraktes Thema. 2025.
short: 'M. Ebert, K. Temmen, in: 2025.'
conference:
end_date: 2025-03-11
location: Oldenburg
name: 20. LeLa-Jahrestagung
start_date: 2025-03-09
date_created: 2026-02-28T12:35:03Z
date_updated: 2026-02-28T12:55:30Z
department:
- _id: '300'
language:
- iso: ger
project:
- _id: '1393'
name: Heranführung der Generation Z an die Denkweise in der Quantenphysik (HedwiQ)
status: public
title: Über Rätsel zur Quantenphysik – Eine spielerische Heranführung an ein abstraktes
Thema
type: conference_abstract
user_id: '91897'
year: '2025'
...
---
_id: '64798'
abstract:
- lang: eng
text: "Lead-containing piezoelectric ceramics are still the base for today’s ultrasonic
transducers used in broad applications. This is partly due to missing powerful
lead-free piezoelectric ceramic parts in the commercial market. There has been
much research on lead-free materials but developing them into marketable parts
seems to be an ongoing process. The actual exemption of ROHS has expired, but
as the new exemption has already been requested, ceramic suppliers keep on selling
lead containing products. Nevertheless, these should be replaced by lead-free
alternatives for environmental and health issues. \r\nThis contribution focuses
on exploring the technological readiness level of lead-free hard piezoceramics
for prestressed ultrasonic transducers. A small series of bolted Langevin transducers
was set up with standard PZT material and three commercial lead-free variants.
Results of the building process from individual ring ceramic characteristics to
transducer load tests are presented. The main finding of this study is that the
lead-free materials technically can compete with the standard PZT for medium-power
applications. Some adaptations in the ultrasonic system must be done: the geometry
must be altered to fit resonance frequency, and higher voltages or thinner ceramics
are needed to achieve the same vibration level at low load. For reaching same
power, the volume of lead-free ceramics must be 1.5 to 3 times larger. As already
promoted in literature, mechanical losses at high vibration levels are smaller
for the lead-free materials. This might help to argument lead-free piezoelectric
materials in some applications.\r\n\r\nReferences\r\n1.\tDirective 2011/65/EU
of the European Parliament and of the Council of 8 June 2011 on the Restriction
of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment.
EUR-Lex Document 02011L0065-20240801. Available online: http://data.europa.eu/eli/dir/2011/65/2024-08-01
(accessed on 24 January 2025).\r\n2.\tLangevin, P. (1918) Method and Apparatus
for Transmitting and Receiving Submarine Elastic Waves Using the Piezoelectric
Properties of Quartz. French Patent Office; Patent No. FR505703.\r\n3.\tHemsel,
T.; Twiefel, J. (2023) Piezoelectric Ultrasonic Power Transducers. In Encyclopedia
of Materials: Electronics; Academic Press: Oxford, UK; pp. 276–285. https://doi.org/10.1016/b978-0-12-819728-8.00047-4.\r\n4.\tATHENA
Technologie Beratung GmbH (2025) Description of Ultrasound Generator. Available
online: http://shop.myathena.de/epages/12074748.sf/de_DE/?ObjectPath=/Shops/12074748/Products/AM200
(accessed on 13 January 2025).\r\n5.\tLittmann, W.; Hemsel, T.; Kauczor, C.; Wallaschek,
J.; Sinha, W. (2003) Load-adaptive phase-controller for resonant driven piezoelectric
devices. Proc. World Congr. Ultrason. 2003, 48, 547–550.\r\n6.\tScheidemann, C.,
Bornmann, P., Littmann, W., & Hemsel, T. (2025). Lead-Free Ceramics in Prestressed
Ultrasonic Transducers. Actuators, 14(2), 55. https://doi.org/10.3390/act14020055\r\n"
author:
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Walter
full_name: Littmann, Walter
last_name: Littmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
citation:
ama: 'Scheidemann C, Bornmann P, Littmann W, Hemsel T. Bolted Langevin transducers
with leadfree piezoelectric ceramics. In: ; 2025.'
apa: Scheidemann, C., Bornmann, P., Littmann, W., & Hemsel, T. (2025). Bolted
Langevin transducers with leadfree piezoelectric ceramics. International Workshop
on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius, Lithuania.
bibtex: '@inproceedings{Scheidemann_Bornmann_Littmann_Hemsel_2025, title={Bolted
Langevin transducers with leadfree piezoelectric ceramics}, author={Scheidemann,
Claus and Bornmann, Peter and Littmann, Walter and Hemsel, Tobias}, year={2025}
}'
chicago: Scheidemann, Claus, Peter Bornmann, Walter Littmann, and Tobias Hemsel.
“Bolted Langevin Transducers with Leadfree Piezoelectric Ceramics,” 2025.
ieee: C. Scheidemann, P. Bornmann, W. Littmann, and T. Hemsel, “Bolted Langevin
transducers with leadfree piezoelectric ceramics,” presented at the International
Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius,
Lithuania, 2025.
mla: Scheidemann, Claus, et al. Bolted Langevin Transducers with Leadfree Piezoelectric
Ceramics. 2025.
short: 'C. Scheidemann, P. Bornmann, W. Littmann, T. Hemsel, in: 2025.'
conference:
end_date: 2025-07-03
location: Vilnius, Lithuania
name: International Workshop on Piezoelectric Materials and Applications in Actuators
(IWPMA)
start_date: 2025-07-01
date_created: 2026-03-02T10:39:40Z
date_updated: 2026-03-02T11:04:56Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
content_type: application/pdf
creator: hemsel
date_created: 2026-03-02T10:37:46Z
date_updated: 2026-03-02T11:00:37Z
file_id: '64799'
file_name: IWPMA_2025_Hemsel.pdf
file_size: 1812289
relation: main_file
file_date_updated: 2026-03-02T11:00:37Z
has_accepted_license: '1'
keyword:
- lead free piezoelectric ceramics
- bolted Langevin transducer
- medium power ultrasound.
language:
- iso: eng
oa: '1'
status: public
title: Bolted Langevin transducers with leadfree piezoelectric ceramics
type: conference
user_id: '210'
year: '2025'
...
---
_id: '64800'
abstract:
- lang: eng
text: "Intensive ultrasonic cleaning of surfaces by means of a lead-free ultrasonic
transducer with focusing sonotrode\r\nUltrasonic cleaning baths are probably a
coincidental development: After underwater sonars had already been successfully
used to detect submarines before 1920, it was probably observed in this environment
that the ultrasonic oscillators not only showed a self-cleaning effect but also
cavitation damage. At the beginning of the 1950s, the first ultrasonic cleaning
devices finally came onto the market. Today, the range of applications ranges
from household appliances for jewellery and eyewear cleaning to classic cleaning
baths for metal parts and systems for cleaning highly sensitive electronic components.
There is a certain gap in handheld, mobile cleaning equipment. Although devices
for spot cleaning of textiles are known, the cleaning effect is usually low. \r\nDue
to the directive 2011/65/EU on the restriction of the use of hazardous substances
in electrical and electronic equipment (RoHS) [1] lead should no longer be used
in technical devices. As today’s standard ceramics for medium and high-power ultrasonic
transducers typically contain lead, there is a need to explore the use of lead-free
ceramics in this field. Honda [2] already offers a cleaning transducer based on
lead-free piezoelectric ceramics, but it is designed to be used in cleaning baths.\r\nThis
article presents the model-based development of a highly innovative ultrasonic
cleaner. On the one hand, lead-free piezoelectric ceramics are used, and on the
other hand, a special sonotrode has been developed that concentrates the sound
in such a way that a strong cavitation and thus cleaning effect is achieved with
comparatively low power in a short time. Coupled field finite element method was
used to find an appropriate geometry for the focussing sonotrode. The comparison
of simulation and measurement results shows that the lead-free piezoceramics used
do their job well and can keep up with standard ceramics, but more ceramic volume
is needed to achieve same power. An advanced control concept was elaborated to
ensure continuous hard cavitation at varying distances between the sonotrode and
the part to be cleaned. Cleaning results for different surfaces and contaminations
are presented. The concept of the focusing sonotrode shows that a convincing cleaning
result can be achieved even with low power and in short time, provided that the
oscillation system and control electronics are suitably coordinated.\r\n\r\nReferences\r\n[1]
http://data.europa.eu/eli/dir/2011/65/2024-08-01 \r\n[2] https://en.honda-el.co.jp/product/ceramics/lineup/lead_off/lead-off
\r\n"
author:
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Walter
full_name: Littmann, Walter
last_name: Littmann
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Hemsel T, Scheidemann C, Bornmann P, Littmann W, Sextro W. Intensive ultrasonic
cleaning of surfaces by means of lead-free ultrasonic transducer with focussing
sonotrode. In: ; 2025.'
apa: Hemsel, T., Scheidemann, C., Bornmann, P., Littmann, W., & Sextro, W. (2025).
Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic
transducer with focussing sonotrode. International Congress on Ultrasonics
(ICU), Paderborn, Germany.
bibtex: '@inproceedings{Hemsel_Scheidemann_Bornmann_Littmann_Sextro_2025, title={Intensive
ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with
focussing sonotrode}, author={Hemsel, Tobias and Scheidemann, Claus and Bornmann,
Peter and Littmann, Walter and Sextro, Walter}, year={2025} }'
chicago: Hemsel, Tobias, Claus Scheidemann, Peter Bornmann, Walter Littmann, and
Walter Sextro. “Intensive Ultrasonic Cleaning of Surfaces by Means of Lead-Free
Ultrasonic Transducer with Focussing Sonotrode,” 2025.
ieee: T. Hemsel, C. Scheidemann, P. Bornmann, W. Littmann, and W. Sextro, “Intensive
ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with
focussing sonotrode,” presented at the International Congress on Ultrasonics (ICU),
Paderborn, Germany, 2025.
mla: Hemsel, Tobias, et al. Intensive Ultrasonic Cleaning of Surfaces by Means
of Lead-Free Ultrasonic Transducer with Focussing Sonotrode. 2025.
short: 'T. Hemsel, C. Scheidemann, P. Bornmann, W. Littmann, W. Sextro, in: 2025.'
conference:
end_date: 2025-09-25
location: Paderborn, Germany
name: International Congress on Ultrasonics (ICU)
start_date: 2025-09-21
date_created: 2026-03-02T10:47:48Z
date_updated: 2026-03-02T10:58:37Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
content_type: application/pdf
creator: hemsel
date_created: 2026-03-02T10:46:43Z
date_updated: 2026-03-02T10:58:37Z
file_id: '64801'
file_name: ICU_2025_Hemsel.pdf
file_size: 1946202
relation: main_file
file_date_updated: 2026-03-02T10:58:37Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
status: public
title: Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic
transducer with focussing sonotrode
type: conference
user_id: '210'
year: '2025'
...
---
_id: '61755'
author:
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Scheidemann C, Hemsel T, Sextro W. Time dependent material characteristics
of prestressed piezoelectric ceramics in langevin transducers. In: ; 2025.'
apa: Scheidemann, C., Hemsel, T., & Sextro, W. (2025). Time dependent material
characteristics of prestressed piezoelectric ceramics in langevin transducers.
22nd International Workshop on Piezoelectric Materials and Applications in Actuators
(IWPMA), Vilnius, Lithuania.
bibtex: '@inproceedings{Scheidemann_Hemsel_Sextro_2025, title={Time dependent material
characteristics of prestressed piezoelectric ceramics in langevin transducers},
author={Scheidemann, Claus and Hemsel, Tobias and Sextro, Walter}, year={2025}
}'
chicago: Scheidemann, Claus, Tobias Hemsel, and Walter Sextro. “Time Dependent Material
Characteristics of Prestressed Piezoelectric Ceramics in Langevin Transducers,”
2025.
ieee: C. Scheidemann, T. Hemsel, and W. Sextro, “Time dependent material characteristics
of prestressed piezoelectric ceramics in langevin transducers,” presented at the
22nd International Workshop on Piezoelectric Materials and Applications in Actuators
(IWPMA), Vilnius, Lithuania, 2025.
mla: Scheidemann, Claus, et al. Time Dependent Material Characteristics of Prestressed
Piezoelectric Ceramics in Langevin Transducers. 2025.
short: 'C. Scheidemann, T. Hemsel, W. Sextro, in: 2025.'
conference:
end_date: 2025-07-3
location: Vilnius, Lithuania
name: 22nd International Workshop on Piezoelectric Materials and Applications in
Actuators (IWPMA)
start_date: 2025-07-1
date_created: 2025-10-08T14:22:32Z
date_updated: 2026-03-02T10:59:53Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
content_type: application/pdf
creator: hemsel
date_created: 2026-01-30T11:07:48Z
date_updated: 2026-03-02T10:59:53Z
file_id: '63817'
file_name: SHS25_IWPMA_2025.pdf
file_size: 644147
relation: main_file
file_date_updated: 2026-03-02T10:59:53Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
status: public
title: Time dependent material characteristics of prestressed piezoelectric ceramics
in langevin transducers
type: conference
user_id: '210'
year: '2025'
...
---
_id: '61757'
author:
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Julius
full_name: Porzenheim, Julius
last_name: Porzenheim
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Scheidemann C, Porzenheim J, Hemsel T, Sextro W. Investigation of the Setting
Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers. In: ; 2025.'
apa: Scheidemann, C., Porzenheim, J., Hemsel, T., & Sextro, W. (2025). Investigation
of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers.
2025 International Congress on Ultrasonics (ICU), Paderborn, Germany.
bibtex: '@inproceedings{Scheidemann_Porzenheim_Hemsel_Sextro_2025, title={Investigation
of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers},
author={Scheidemann, Claus and Porzenheim, Julius and Hemsel, Tobias and Sextro,
Walter}, year={2025} }'
chicago: Scheidemann, Claus, Julius Porzenheim, Tobias Hemsel, and Walter Sextro.
“Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic
Transducers,” 2025.
ieee: C. Scheidemann, J. Porzenheim, T. Hemsel, and W. Sextro, “Investigation of
the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers,”
presented at the 2025 International Congress on Ultrasonics (ICU), Paderborn,
Germany, 2025.
mla: Scheidemann, Claus, et al. Investigation of the Setting Behaviour of Mechanically
Biased Piezoelectric Ultrasonic Transducers. 2025.
short: 'C. Scheidemann, J. Porzenheim, T. Hemsel, W. Sextro, in: 2025.'
conference:
end_date: 2025-09-25
location: Paderborn, Germany
name: 2025 International Congress on Ultrasonics (ICU)
start_date: 2025-09-21
date_created: 2025-10-08T14:33:44Z
date_updated: 2026-03-02T10:59:36Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
content_type: application/pdf
creator: hemsel
date_created: 2026-01-30T07:30:44Z
date_updated: 2026-03-02T10:59:36Z
file_id: '63816'
file_name: Sch25_ICU_2025.pdf
file_size: 783790
relation: main_file
file_date_updated: 2026-03-02T10:59:36Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
status: public
title: Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric
Ultrasonic Transducers
type: conference
user_id: '210'
year: '2025'
...
---
_id: '62988'
author:
- first_name: Augustina C.
full_name: Amakor, Augustina C.
last_name: Amakor
- first_name: Manuel B.
full_name: Berkemeier, Manuel B.
last_name: Berkemeier
- first_name: Meike Claudia
full_name: Wohlleben, Meike Claudia
id: '43991'
last_name: Wohlleben
orcid: 0009-0009-9767-7168
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Sebastian
full_name: Peitz, Sebastian
last_name: Peitz
citation:
ama: 'Amakor AC, Berkemeier MB, Wohlleben MC, Sextro W, Peitz S. Surrogate-Assisted
Multi-objective Design of Complex Multibody Systems. In: Lecture Notes in Computer
Science. Springer Nature Switzerland; 2025. doi:10.1007/978-3-032-04555-3_21'
apa: Amakor, A. C., Berkemeier, M. B., Wohlleben, M. C., Sextro, W., & Peitz,
S. (2025). Surrogate-Assisted Multi-objective Design of Complex Multibody Systems.
In Lecture Notes in Computer Science. Springer Nature Switzerland. https://doi.org/10.1007/978-3-032-04555-3_21
bibtex: '@inbook{Amakor_Berkemeier_Wohlleben_Sextro_Peitz_2025, place={Cham}, title={Surrogate-Assisted
Multi-objective Design of Complex Multibody Systems}, DOI={10.1007/978-3-032-04555-3_21},
booktitle={Lecture Notes in Computer Science}, publisher={Springer Nature Switzerland},
author={Amakor, Augustina C. and Berkemeier, Manuel B. and Wohlleben, Meike Claudia
and Sextro, Walter and Peitz, Sebastian}, year={2025} }'
chicago: 'Amakor, Augustina C., Manuel B. Berkemeier, Meike Claudia Wohlleben, Walter
Sextro, and Sebastian Peitz. “Surrogate-Assisted Multi-Objective Design of Complex
Multibody Systems.” In Lecture Notes in Computer Science. Cham: Springer
Nature Switzerland, 2025. https://doi.org/10.1007/978-3-032-04555-3_21.'
ieee: 'A. C. Amakor, M. B. Berkemeier, M. C. Wohlleben, W. Sextro, and S. Peitz,
“Surrogate-Assisted Multi-objective Design of Complex Multibody Systems,” in Lecture
Notes in Computer Science, Cham: Springer Nature Switzerland, 2025.'
mla: Amakor, Augustina C., et al. “Surrogate-Assisted Multi-Objective Design of Complex
Multibody Systems.” Lecture Notes in Computer Science, Springer Nature
Switzerland, 2025, doi:10.1007/978-3-032-04555-3_21.
short: 'A.C. Amakor, M.B. Berkemeier, M.C. Wohlleben, W. Sextro, S. Peitz, in: Lecture
Notes in Computer Science, Springer Nature Switzerland, Cham, 2025.'
date_created: 2025-12-09T12:46:17Z
date_updated: 2026-03-03T06:32:10Z
department:
- _id: '151'
doi: 10.1007/978-3-032-04555-3_21
language:
- iso: eng
place: Cham
publication: Lecture Notes in Computer Science
publication_identifier:
isbn:
- '9783032045546'
- '9783032045553'
issn:
- 0302-9743
- 1611-3349
publication_status: published
publisher: Springer Nature Switzerland
quality_controlled: '1'
status: public
title: Surrogate-Assisted Multi-objective Design of Complex Multibody Systems
type: book_chapter
user_id: '43991'
year: '2025'
...
---
_id: '64812'
author:
- first_name: Julia
full_name: Hofmann, Julia
id: '104312'
last_name: Hofmann
- first_name: Dominik
full_name: Teutenberg, Dominik
id: '537'
last_name: Teutenberg
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
citation:
ama: 'Hofmann J, Teutenberg D, Meschut G. Methodenentwicklung zur numerischen Auslegung
von Klebverbindungen mit lackierten Fügeteilen. In: DECHEMA, ed. 25. Kolloquium:
Gemeinsame Forschung in Der Klebtechnik. ; 2025.'
apa: 'Hofmann, J., Teutenberg, D., & Meschut, G. (2025). Methodenentwicklung
zur numerischen Auslegung von Klebverbindungen mit lackierten Fügeteilen. In DECHEMA
(Ed.), 25. Kolloquium: Gemeinsame Forschung in der Klebtechnik.'
bibtex: '@inproceedings{Hofmann_Teutenberg_Meschut_2025, title={Methodenentwicklung
zur numerischen Auslegung von Klebverbindungen mit lackierten Fügeteilen}, booktitle={25.
Kolloquium: Gemeinsame Forschung in der Klebtechnik}, author={Hofmann, Julia and
Teutenberg, Dominik and Meschut, Gerson}, editor={DECHEMA}, year={2025} }'
chicago: 'Hofmann, Julia, Dominik Teutenberg, and Gerson Meschut. “Methodenentwicklung
Zur Numerischen Auslegung von Klebverbindungen Mit Lackierten Fügeteilen.” In
25. Kolloquium: Gemeinsame Forschung in Der Klebtechnik, edited by DECHEMA,
2025.'
ieee: 'J. Hofmann, D. Teutenberg, and G. Meschut, “Methodenentwicklung zur numerischen
Auslegung von Klebverbindungen mit lackierten Fügeteilen,” in 25. Kolloquium:
Gemeinsame Forschung in der Klebtechnik, Köln, 2025.'
mla: 'Hofmann, Julia, et al. “Methodenentwicklung Zur Numerischen Auslegung von
Klebverbindungen Mit Lackierten Fügeteilen.” 25. Kolloquium: Gemeinsame Forschung
in Der Klebtechnik, edited by DECHEMA, 2025.'
short: 'J. Hofmann, D. Teutenberg, G. Meschut, in: DECHEMA (Ed.), 25. Kolloquium:
Gemeinsame Forschung in Der Klebtechnik, 2025.'
conference:
end_date: 2025-02-19
location: Köln
name: '25. Kolloquium: Gemeinsame Forschung in der Klebtechnik'
start_date: 2025-02-18
corporate_editor:
- DECHEMA
date_created: 2026-03-03T08:26:48Z
date_updated: 2026-03-03T08:55:23Z
department:
- _id: '157'
language:
- iso: eng
publication: '25. Kolloquium: Gemeinsame Forschung in der Klebtechnik'
status: public
title: Methodenentwicklung zur numerischen Auslegung von Klebverbindungen mit lackierten
Fügeteilen
type: conference_abstract
user_id: '104312'
year: '2025'
...
---
_id: '64611'
abstract:
- lang: ger
text: "Für die Aufrechterhaltung der natürlichen Ressourcen ist eine effiziente
Nutzung dieser essenziell. Vor diesem Hintergrund untersucht das vorliegende Paper
die Rolle der Kreislaufwirtschaft als wegweisendes Wirtschaftsmodell, das von
der Europäischen Union gefördert wird. Ziel der Kreislaufwirtschaft ist es, den
Ressourcenverbrauch und die Abfallproduktion zu minimieren, indem ein kontinuierlicher
Kreislauf aus Nutzung, Wiederverwendung und Recycling von Materialien geschaffen
wird. \r\nEin zentraler Aspekt dabei ist der Produktentwicklungsprozess (PEP)
- ein vielschichtiger Prozess mit zahlreichen Einflussfaktoren und theoretisch
unbegrenzten Gestaltungsmöglichkeiten. Diese Vielfalt führt jedoch zu erheblichen
Entscheidungsunsicherheiten, die die Umsetzung von Kreislaufwirtschaftsprinzipien
erschweren können. Um diese Herausforderungen zu adressieren, wird ein methodischer
Prozess vorgestellt, der eine systematische Klassifizierung im Zusammenhang mit
umliegenden Bauteilen ermöglicht. Die Methodik basiert auf einer strukturierten
Bewertung von Bauteilen hinsichtlich ihrer Relevanz für die Kreislaufwirtschaft.
Dabei werden zentrale Aspekte wie Wiederverwendbarkeit, Recyclingfähigkeit und
Ressourceneffizienz berücksichtigt, darunter: \r\n•\tHandelt es sich um ein Gebrauchs-
oder Verbrauchsprodukt?\r\n•\tIst das Bauteil eine Wiederverwendung oder eine
Neufertigung?\r\n•\tIst das Bauteil standardisiert, zugekauft oder individuell
ausgerichtet?\r\n•\tWelche primäre Funktion nimmt das Bauteil ein?\r\nDiese strukturierte
Klassifizierung unterstützt die Entscheidungsfindung bereits früh im PEP. Sie
ermöglicht es Produktentwickelnden, Potenziale für die Kreislaufwirtschaft frühzeitig
zu erkennen und gezielt nachhaltige Maßnahmen zu ergreifen.\r\nDie entwickelte
Methodik bildet somit eine Grundlage für die Integration kreislaufwirtschaftlicher
Prinzipien in den Entwicklungsprozess. Insbesondere im Kontext moderner Anforderungen
des Mobility Management zeigt sich ihr Potenzial, nachhaltige Innovationen gezielt
zu fördern und die Umsetzung der Kreislaufwirtschaft in der industriellen Praxis
zu erleichtern."
author:
- first_name: Katharina
full_name: Rohde, Katharina
id: '70143'
last_name: Rohde
orcid: 0009-0000-5738-7304
- first_name: Manuel
full_name: Ott, Manuel
id: '44204'
last_name: Ott
- first_name: Finn Lukas
full_name: Budde, Finn Lukas
id: '74585'
last_name: Budde
- first_name: Iryna
full_name: Mozgova, Iryna
id: '95903'
last_name: Mozgova
citation:
ama: 'Rohde K, Ott M, Budde FL, Mozgova I. Optimierung modularer Produkte für die
Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte. In: Proff H, ed.
Solving Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche
Aspekte. Springer Nature Meteor.'
apa: 'Rohde, K., Ott, M., Budde, F. L., & Mozgova, I. (n.d.). Optimierung modularer
Produkte für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte.
In H. Proff (Ed.), Solving Conflicts on the Way to Sustainable Mobility: Technische
und betriebswirtschaftliche Aspekte. Springer Nature Meteor.'
bibtex: '@inproceedings{Rohde_Ott_Budde_Mozgova, title={Optimierung modularer Produkte
für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte}, booktitle={Solving
Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche
Aspekte}, publisher={Springer Nature Meteor}, author={Rohde, Katharina and Ott,
Manuel and Budde, Finn Lukas and Mozgova, Iryna}, editor={Proff, Heike} }'
chicago: 'Rohde, Katharina, Manuel Ott, Finn Lukas Budde, and Iryna Mozgova. “Optimierung
modularer Produkte für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre
Produkte.” In Solving Conflicts on the Way to Sustainable Mobility: Technische
und betriebswirtschaftliche Aspekte, edited by Heike Proff. Springer Nature
Meteor, n.d.'
ieee: 'K. Rohde, M. Ott, F. L. Budde, and I. Mozgova, “Optimierung modularer Produkte
für die Mobilität: Ein Klassifizierungsrahmen für zirkuläre Produkte,” in Solving
Conflicts on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche
Aspekte, Duisburg.'
mla: 'Rohde, Katharina, et al. “Optimierung modularer Produkte für die Mobilität:
Ein Klassifizierungsrahmen für zirkuläre Produkte.” Solving Conflicts on the
Way to Sustainable Mobility: Technische und betriebswirtschaftliche Aspekte,
edited by Heike Proff, Springer Nature Meteor.'
short: 'K. Rohde, M. Ott, F.L. Budde, I. Mozgova, in: H. Proff (Ed.), Solving Conflicts
on the Way to Sustainable Mobility: Technische und betriebswirtschaftliche Aspekte,
Springer Nature Meteor, n.d.'
conference:
location: Duisburg
name: 17. Wissenschaftsforum Mobilität
start_date: 2025-05-15
date_created: 2026-02-24T12:40:57Z
date_updated: 2026-03-03T11:21:06Z
ddc:
- '620'
department:
- _id: '741'
editor:
- first_name: Heike
full_name: Proff, Heike
last_name: Proff
has_accepted_license: '1'
language:
- iso: ger
main_file_link:
- open_access: '1'
oa: '1'
publication: 'Solving Conflicts on the Way to Sustainable Mobility: Technische und
betriebswirtschaftliche Aspekte'
publication_status: inpress
publisher: Springer Nature Meteor
quality_controlled: '1'
status: public
title: 'Optimierung modularer Produkte für die Mobilität: Ein Klassifizierungsrahmen
für zirkuläre Produkte'
type: conference
user_id: '70143'
year: '2025'
...
---
_id: '64804'
abstract:
- lang: ger
text: "Das Ultraschallschweißen ist in der Verpackungs-, Halbleiter- und Automobilindustrie
weit verbreitet. Neben dem Schweißen von Blechen bietet es die Möglichkeit, Folien
oder Hülsen zu verschweißen. Konventionelle Schweißsysteme arbeiten mit Längs-
oder Biegeschwingungen, deren Hauptanteil in der Schweißebene liegt. Der orthogonale
Anteil verursacht zusätzliche Belastungen im Schweißgut. Bei der Verwendung von
Torsionsschwingungen wird die orthogonale Komponente der Schwingung nahezu eliminiert.
\r\nIn diesem Beitrag wird ein System vorgestellt, bei dem die Torsionsschwingung
durch tangentiale Polarisation der Piezokeramiken erzeugt wird. Der Transducer
ist axial oberhalb des Schweißpunktes platziert, sodass die Normalkraft momentfrei
aufgebracht wird. Das Schweißwerkzeug weicht beim Schweißvorgang daher seitlich
nicht aus. Zudem wird das Schweißen an schwer zugänglichen Positionen vereinfacht,
da der Systemaufbau deutlich schlanker ist als konventionelle Ultraschallschweißsysteme.\r\nDie
Auslegung des Torsionsschwingsystems stellt eine Herausforderung dar. Insbesondere
muss die Lagerung des Schwingers betrachtet werden, da diese die Normalkraft übertragen
und zugleich die Schwingung nicht beeinträchtigen soll. Der Schweißprozess bewirkt
eine Verschiebung von Schwingungsknoten und Resonanzfrequenzen. Im Rahmen des
Vortrags wird ein Finite-Elemente-Simulationsmodell vorgestellt, das in Kombination
mit einem Lastmodell das Systemverhalten während des Schweißprozesses abbildet.
Die Geometrie des Transducers wurde schrittweise so angepasst, dass die Schwingamplitude
im Lagerungspunkt minimiert wird. \r\n"
author:
- first_name: Markus Daniel
full_name: Dohmen, Markus Daniel
id: '69217'
last_name: Dohmen
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Walter
full_name: Littmann, Walter
last_name: Littmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Dohmen MD, Bornmann P, Littmann W, Hemsel T, Sextro W. Modellgestützte Optimierung
eines Ultraschall-Torsionsschweißsystems. In: ; 2025.'
apa: Dohmen, M. D., Bornmann, P., Littmann, W., Hemsel, T., & Sextro, W. (2025).
Modellgestützte Optimierung eines Ultraschall-Torsionsschweißsystems.
bibtex: '@inproceedings{Dohmen_Bornmann_Littmann_Hemsel_Sextro_2025, title={Modellgestützte
Optimierung eines Ultraschall-Torsionsschweißsystems}, author={Dohmen, Markus
Daniel and Bornmann, Peter and Littmann, Walter and Hemsel, Tobias and Sextro,
Walter}, year={2025} }'
chicago: Dohmen, Markus Daniel, Peter Bornmann, Walter Littmann, Tobias Hemsel,
and Walter Sextro. “Modellgestützte Optimierung Eines Ultraschall-Torsionsschweißsystems,”
2025.
ieee: M. D. Dohmen, P. Bornmann, W. Littmann, T. Hemsel, and W. Sextro, “Modellgestützte
Optimierung eines Ultraschall-Torsionsschweißsystems,” 2025.
mla: Dohmen, Markus Daniel, et al. Modellgestützte Optimierung Eines Ultraschall-Torsionsschweißsystems.
2025.
short: 'M.D. Dohmen, P. Bornmann, W. Littmann, T. Hemsel, W. Sextro, in: 2025.'
date_created: 2026-03-02T12:02:08Z
date_updated: 2026-03-03T13:57:25Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: closed
content_type: application/pdf
creator: hemsel
date_created: 2026-03-02T12:01:28Z
date_updated: 2026-03-02T12:01:28Z
file_id: '64805'
file_name: Dohmen_UPB_LDM_IMAPS_2025.pdf
file_size: 1912154
relation: main_file
success: 1
file_date_updated: 2026-03-02T12:01:28Z
has_accepted_license: '1'
language:
- iso: eng
status: public
title: Modellgestützte Optimierung eines Ultraschall-Torsionsschweißsystems
type: conference
user_id: '210'
year: '2025'
...
---
_id: '64824'
abstract:
- lang: eng
text: '(1) Background: As digitalisation transforms society, digital competences
are increasingly essential. Yet students’ digital competences often vary significantly,
largely influenced by socio-economic background. Some schools—termed “resilient
schools”—effectively counter these disadvantages and foster high digital competence.
This study investigates the prevalence of such schools and examines how they differ
from others. (2) Methods: Drawing on representative ICILS 2023 data, quantitative
secondary analyses—including descriptive statistics, t-tests, and multiple regression—were
conducted. Following the identification of resilient schools, in-depth analyses
focus on those countries with substantial proportions of resilient schools above
10 percent (Austria, Italy, and Portugal), as these countries seem to have effective
strategies to foster school resilience. (3) Results: The findings highlight considerable
cross-national variation, indicating that school resilience is context-dependent.
Resilient schools consistently emphasise student learning-related factors—such
as ICT-related attitudes and educational aspirations—while the influence of home
environments is less pronounced than in other schools. (4) Conclusions: Strengthening
student learning-related factors appears to be crucial for building digital resilience.
These insights can inform policy and practice aimed at fostering educational equity
and closing the digital divide, particularly in socio-economically disadvantaged
contexts.'
article_number: '898'
author:
- first_name: Jan
full_name: Niemann, Jan
last_name: Niemann
- first_name: Birgit
full_name: Eickelmann, Birgit
last_name: Eickelmann
- first_name: Kerstin
full_name: Drossel, Kerstin
last_name: Drossel
citation:
ama: Niemann J, Eickelmann B, Drossel K. Overcoming Digital Inequalities—Identification
and Characterisation of Digitally Resilient Schools in Different Countries Using
ICILS 2023 Data. Education Sciences. 2025;15(7). doi:10.3390/educsci15070898
apa: Niemann, J., Eickelmann, B., & Drossel, K. (2025). Overcoming Digital Inequalities—Identification
and Characterisation of Digitally Resilient Schools in Different Countries Using
ICILS 2023 Data. Education Sciences, 15(7), Article 898. https://doi.org/10.3390/educsci15070898
bibtex: '@article{Niemann_Eickelmann_Drossel_2025, title={Overcoming Digital Inequalities—Identification
and Characterisation of Digitally Resilient Schools in Different Countries Using
ICILS 2023 Data}, volume={15}, DOI={10.3390/educsci15070898},
number={7898}, journal={Education Sciences}, publisher={MDPI AG}, author={Niemann,
Jan and Eickelmann, Birgit and Drossel, Kerstin}, year={2025} }'
chicago: Niemann, Jan, Birgit Eickelmann, and Kerstin Drossel. “Overcoming Digital
Inequalities—Identification and Characterisation of Digitally Resilient Schools
in Different Countries Using ICILS 2023 Data.” Education Sciences 15, no.
7 (2025). https://doi.org/10.3390/educsci15070898.
ieee: 'J. Niemann, B. Eickelmann, and K. Drossel, “Overcoming Digital Inequalities—Identification
and Characterisation of Digitally Resilient Schools in Different Countries Using
ICILS 2023 Data,” Education Sciences, vol. 15, no. 7, Art. no. 898, 2025,
doi: 10.3390/educsci15070898.'
mla: Niemann, Jan, et al. “Overcoming Digital Inequalities—Identification and Characterisation
of Digitally Resilient Schools in Different Countries Using ICILS 2023 Data.”
Education Sciences, vol. 15, no. 7, 898, MDPI AG, 2025, doi:10.3390/educsci15070898.
short: J. Niemann, B. Eickelmann, K. Drossel, Education Sciences 15 (2025).
date_created: 2026-03-04T09:38:17Z
date_updated: 2026-03-04T09:41:33Z
department:
- _id: '462'
doi: 10.3390/educsci15070898
intvolume: ' 15'
issue: '7'
language:
- iso: eng
publication: Education Sciences
publication_identifier:
issn:
- 2227-7102
publication_status: published
publisher: MDPI AG
status: public
title: Overcoming Digital Inequalities—Identification and Characterisation of Digitally
Resilient Schools in Different Countries Using ICILS 2023 Data
type: journal_article
user_id: '40387'
volume: 15
year: '2025'
...
---
_id: '61202'
abstract:
- lang: eng
text: The number of datasets on the web of data increases continuously. However,
the knowledge contained therein cannot be fully utilized without finding links
between the entities contained in these datasets. Equivalent entities can not
be identified solely by checking the equivalence of IRIs because of the different
origins and naming schemes of different data providers. Yet, such equivalences
can be discovered by computing the similarity of their attributes. In this paper
we propose GLIDE, an approach that links entities from two different datasets
by embedding a joint model of these datasets enriched by additional relations
describing the similarity of literals. The joint model is embedded into a latent
vector space while paying attention to juxtaposing similar literals. We evaluate
our approach against state-of-the-art algorithms using real-world datasets commonly
used in link discovery literature. The results show that GLIDE outperforms all
baselines on 5 of 7 datasets with perfect or near-perfect accuracy. Our approach
achieves its best performance on datasets that feature several literals with similarities.
Our experiments indicate that researchers should not only pay attention to equal
literals in knowledge graph embedding but should also be aware of the distance
between similar literals.
author:
- first_name: Alexander
full_name: Becker, Alexander
last_name: Becker
- first_name: Axel-Cyrille
full_name: Ngonga Ngomo, Axel-Cyrille
id: '65716'
last_name: Ngonga Ngomo
- first_name: 'Mohamed '
full_name: 'Sherif, Mohamed '
last_name: Sherif
citation:
ama: 'Becker A, Ngonga Ngomo A-C, Sherif M. GLIDE: Knowledge Graph Linking using
Distance-Aware Embeddings. In: The Semantic Web – ISWC 2025. ; 2025.'
apa: 'Becker, A., Ngonga Ngomo, A.-C., & Sherif, M. (2025). GLIDE: Knowledge
Graph Linking using Distance-Aware Embeddings. The Semantic Web – ISWC 2025.
ISWC 2025.'
bibtex: '@inproceedings{Becker_Ngonga Ngomo_Sherif_2025, place={Nara, Japan}, title={GLIDE:
Knowledge Graph Linking using Distance-Aware Embeddings}, booktitle={The Semantic
Web – ISWC 2025}, author={Becker, Alexander and Ngonga Ngomo, Axel-Cyrille and
Sherif, Mohamed }, year={2025} }'
chicago: 'Becker, Alexander, Axel-Cyrille Ngonga Ngomo, and Mohamed Sherif. “GLIDE:
Knowledge Graph Linking Using Distance-Aware Embeddings.” In The Semantic Web
– ISWC 2025. Nara, Japan, 2025.'
ieee: 'A. Becker, A.-C. Ngonga Ngomo, and M. Sherif, “GLIDE: Knowledge Graph Linking
using Distance-Aware Embeddings,” presented at the ISWC 2025, 2025.'
mla: 'Becker, Alexander, et al. “GLIDE: Knowledge Graph Linking Using Distance-Aware
Embeddings.” The Semantic Web – ISWC 2025, 2025.'
short: 'A. Becker, A.-C. Ngonga Ngomo, M. Sherif, in: The Semantic Web – ISWC 2025,
Nara, Japan, 2025.'
conference:
name: ISWC 2025
date_created: 2025-09-11T10:04:16Z
date_updated: 2025-09-11T10:34:52Z
department:
- _id: '574'
keyword:
- becker sherif enexa sailproject dice simba ngonga whale
language:
- iso: eng
place: Nara, Japan
publication: The Semantic Web – ISWC 2025
status: public
title: 'GLIDE: Knowledge Graph Linking using Distance-Aware Embeddings'
type: conference
user_id: '67234'
year: '2025'
...
---
_id: '61134'
author:
- first_name: Ali
full_name: Manzoor, Ali
id: '77309'
last_name: Manzoor
orcid: https://orcid.org/0000-0001-8403-5160
- first_name: René
full_name: Speck, René
id: '70843'
last_name: Speck
- first_name: Hamada Mohamed Abdelsamee
full_name: Zahera, Hamada Mohamed Abdelsamee
id: '72768'
last_name: Zahera
orcid: 0000-0003-0215-1278
- first_name: Muhammad
full_name: Saleem, Muhammad
last_name: Saleem
- 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: Manzoor A, Speck R, Zahera HMA, Saleem M, Moussallem D, Ngonga Ngomo A-C. Multilingual
Relation Extraction - A Survey. IEEE Access. Published online 2025:1-1.
doi:10.1109/access.2025.3604258
apa: Manzoor, A., Speck, R., Zahera, H. M. A., Saleem, M., Moussallem, D., &
Ngonga Ngomo, A.-C. (2025). Multilingual Relation Extraction - A Survey. IEEE
Access, 1–1. https://doi.org/10.1109/access.2025.3604258
bibtex: '@article{Manzoor_Speck_Zahera_Saleem_Moussallem_Ngonga Ngomo_2025, title={Multilingual
Relation Extraction - A Survey}, DOI={10.1109/access.2025.3604258},
journal={IEEE Access}, publisher={Institute of Electrical and Electronics Engineers
(IEEE)}, author={Manzoor, Ali and Speck, René and Zahera, Hamada Mohamed Abdelsamee
and Saleem, Muhammad and Moussallem, Diego and Ngonga Ngomo, Axel-Cyrille}, year={2025},
pages={1–1} }'
chicago: Manzoor, Ali, René Speck, Hamada Mohamed Abdelsamee Zahera, Muhammad Saleem,
Diego Moussallem, and Axel-Cyrille Ngonga Ngomo. “Multilingual Relation Extraction
- A Survey.” IEEE Access, 2025, 1–1. https://doi.org/10.1109/access.2025.3604258.
ieee: 'A. Manzoor, R. Speck, H. M. A. Zahera, M. Saleem, D. Moussallem, and A.-C.
Ngonga Ngomo, “Multilingual Relation Extraction - A Survey,” IEEE Access,
pp. 1–1, 2025, doi: 10.1109/access.2025.3604258.'
mla: Manzoor, Ali, et al. “Multilingual Relation Extraction - A Survey.” IEEE
Access, Institute of Electrical and Electronics Engineers (IEEE), 2025, pp.
1–1, doi:10.1109/access.2025.3604258.
short: A. Manzoor, R. Speck, H.M.A. Zahera, M. Saleem, D. Moussallem, A.-C. Ngonga
Ngomo, IEEE Access (2025) 1–1.
date_created: 2025-09-04T13:32:08Z
date_updated: 2025-09-11T11:14:27Z
department:
- _id: '574'
doi: 10.1109/access.2025.3604258
language:
- iso: eng
page: 1-1
publication: IEEE Access
publication_identifier:
issn:
- 2169-3536
publication_status: published
publisher: Institute of Electrical and Electronics Engineers (IEEE)
status: public
title: Multilingual Relation Extraction - A Survey
type: journal_article
user_id: '77309'
year: '2025'
...
---
_id: '61222'
author:
- first_name: Michael
full_name: Lenke, Michael
id: '32621'
last_name: Lenke
- first_name: Nils
full_name: Klowait, Nils
id: '98454'
last_name: Klowait
orcid: 0000-0002-7347-099X
- first_name: Lea
full_name: Biere, Lea
id: '46664'
last_name: Biere
- first_name: Carsten
full_name: Schulte, Carsten
id: '60311'
last_name: Schulte
citation:
ama: 'Lenke M, Klowait N, Biere L, Schulte C. Assessing AI Literacy: A Systematic
Review of Questionnaires with Emphasis on Affective, Behavioral, Cognitive, and Ethical
Aspects. In: Lecture Notes in Computer Science. Springer Nature Switzerland;
2025. doi:10.1007/978-3-032-01222-7_8'
apa: 'Lenke, M., Klowait, N., Biere, L., & Schulte, C. (2025). Assessing AI
Literacy: A Systematic Review of Questionnaires with Emphasis on Affective, Behavioral,
Cognitive, and Ethical Aspects. In Lecture Notes in Computer Science. Springer
Nature Switzerland. https://doi.org/10.1007/978-3-032-01222-7_8'
bibtex: '@inbook{Lenke_Klowait_Biere_Schulte_2025, place={Cham}, title={Assessing
AI Literacy: A Systematic Review of Questionnaires with Emphasis on Affective,
Behavioral, Cognitive, and Ethical Aspects}, DOI={10.1007/978-3-032-01222-7_8},
booktitle={Lecture Notes in Computer Science}, publisher={Springer Nature Switzerland},
author={Lenke, Michael and Klowait, Nils and Biere, Lea and Schulte, Carsten},
year={2025} }'
chicago: 'Lenke, Michael, Nils Klowait, Lea Biere, and Carsten Schulte. “Assessing
AI Literacy: A Systematic Review of Questionnaires with Emphasis on Affective,
Behavioral, Cognitive, and Ethical Aspects.” In Lecture Notes in Computer Science.
Cham: Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-032-01222-7_8.'
ieee: 'M. Lenke, N. Klowait, L. Biere, and C. Schulte, “Assessing AI Literacy: A
Systematic Review of Questionnaires with Emphasis on Affective, Behavioral, Cognitive,
and Ethical Aspects,” in Lecture Notes in Computer Science, Cham: Springer
Nature Switzerland, 2025.'
mla: 'Lenke, Michael, et al. “Assessing AI Literacy: A Systematic Review of Questionnaires
with Emphasis on Affective, Behavioral, Cognitive, and Ethical Aspects.” Lecture
Notes in Computer Science, Springer Nature Switzerland, 2025, doi:10.1007/978-3-032-01222-7_8.'
short: 'M. Lenke, N. Klowait, L. Biere, C. Schulte, in: Lecture Notes in Computer
Science, Springer Nature Switzerland, Cham, 2025.'
date_created: 2025-09-11T14:02:42Z
date_updated: 2025-09-11T14:07:54Z
department:
- _id: '67'
doi: 10.1007/978-3-032-01222-7_8
language:
- iso: eng
place: Cham
project:
- _id: '119'
name: TRR 318 - Project Area Ö
publication: Lecture Notes in Computer Science
publication_identifier:
isbn:
- '9783032012210'
- '9783032012227'
issn:
- 0302-9743
- 1611-3349
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: 'Assessing AI Literacy: A Systematic Review of Questionnaires with Emphasis
on Affective, Behavioral, Cognitive, and Ethical Aspects'
type: book_chapter
user_id: '98454'
year: '2025'
...
---
_id: '61223'
abstract:
- lang: eng
text: 'Contemporary debates about artificial intelligence (AI) still treat
automation as a straightforward substitution of human labor by machines. Drawing
on Goffman’s dramaturgical sociology, this paper reframes AI in the workplace
as supplementary rather than substitutive
automation. We argue that the central—but routinely overlooked—terrain of struggle
is symbolic-interactional: workers continuously stage, conceal, and re-negotiate
what counts as “real” work and professional competence. Large language models
(LLMs) such as ChatGPT exemplify this dynamic. They quietly take over the invisible,
routinised tasks that underpin cognitive occupations (editing, summarizing, first-draft
production) while leaving humans to enact the highly visible or relational facets
that sustain occupational prestige. Drawing on diverse sources to illustrate our
theoretical argument, we show how individual workers, dramaturgical teams, and
entire professional fields manage impressions of expertise in order to counter
status threats, renegotiate fees, or obscure the extent of AI assistance. The
paper itself, having been intentionally written with the ‘aid’ of all presently
available frontier AI models, serves as a meta-reflexive performance of professional
self-staging. The dramaturgical framework clarifies why utopian tales of friction-free
augmentation and dystopian narratives of total displacement both misread how automation
is actually unfolding. By foregrounding visibility, obfuscation, and impression
management, the article presents a differentiated case for AI’s impact on the
performative structure of work, outlines diagnostic tools for assessing real-world
AI exposure beyond hype-driven headlines, and argues for a more human-centered
basis for evaluating policy responses to the ‘fourth industrial revolution.’ In
short, AI enters the labor process not as an autonomous actor, but as a prop within
an ongoing social performance—one whose scripts, stages, and audiences remain
irreducibly human.'
article_number: '1614473'
author:
- first_name: Nils
full_name: Klowait, Nils
id: '98454'
last_name: Klowait
orcid: 0000-0002-7347-099X
- first_name: Maria
full_name: Erofeeva, Maria
last_name: Erofeeva
citation:
ama: Klowait N, Erofeeva M. The presentation of self in the age of ChatGPT. Frontiers
in Sociology. 2025;10. doi:10.3389/fsoc.2025.1614473
apa: Klowait, N., & Erofeeva, M. (2025). The presentation of self in the age
of ChatGPT. Frontiers in Sociology, 10, Article 1614473. https://doi.org/10.3389/fsoc.2025.1614473
bibtex: '@article{Klowait_Erofeeva_2025, title={The presentation of self in the
age of ChatGPT}, volume={10}, DOI={10.3389/fsoc.2025.1614473},
number={1614473}, journal={Frontiers in Sociology}, publisher={Frontiers Media
SA}, author={Klowait, Nils and Erofeeva, Maria}, year={2025} }'
chicago: Klowait, Nils, and Maria Erofeeva. “The Presentation of Self in the Age
of ChatGPT.” Frontiers in Sociology 10 (2025). https://doi.org/10.3389/fsoc.2025.1614473.
ieee: 'N. Klowait and M. Erofeeva, “The presentation of self in the age of ChatGPT,”
Frontiers in Sociology, vol. 10, Art. no. 1614473, 2025, doi: 10.3389/fsoc.2025.1614473.'
mla: Klowait, Nils, and Maria Erofeeva. “The Presentation of Self in the Age of
ChatGPT.” Frontiers in Sociology, vol. 10, 1614473, Frontiers Media SA,
2025, doi:10.3389/fsoc.2025.1614473.
short: N. Klowait, M. Erofeeva, Frontiers in Sociology 10 (2025).
date_created: 2025-09-11T14:08:31Z
date_updated: 2025-09-11T14:10:30Z
department:
- _id: '603'
doi: 10.3389/fsoc.2025.1614473
intvolume: ' 10'
language:
- iso: eng
project:
- _id: '119'
name: TRR 318 - Project Area Ö
publication: Frontiers in Sociology
publication_identifier:
issn:
- 2297-7775
publication_status: published
publisher: Frontiers Media SA
status: public
title: The presentation of self in the age of ChatGPT
type: journal_article
user_id: '98454'
volume: 10
year: '2025'
...
---
_id: '61226'
author:
- first_name: Maria
full_name: Erofeeva, Maria
last_name: Erofeeva
- first_name: Nils
full_name: Klowait, Nils
id: '98454'
last_name: Klowait
orcid: 0000-0002-7347-099X
- first_name: Mikael
full_name: Belov, Mikael
last_name: Belov
- first_name: Yoann
full_name: Soulié, Yoann
last_name: Soulié
citation:
ama: 'Erofeeva M, Klowait N, Belov M, Soulié Y. Leveraging VR Tools for Inclusive
Education: Implications from Sign Language Learning in VRChat. In: Communications
in Computer and Information Science. Springer Nature Switzerland; 2025. doi:10.1007/978-3-031-98080-0_10'
apa: 'Erofeeva, M., Klowait, N., Belov, M., & Soulié, Y. (2025). Leveraging
VR Tools for Inclusive Education: Implications from Sign Language Learning in VRChat.
In Communications in Computer and Information Science. Springer Nature
Switzerland. https://doi.org/10.1007/978-3-031-98080-0_10'
bibtex: '@inbook{Erofeeva_Klowait_Belov_Soulié_2025, place={Cham}, title={Leveraging
VR Tools for Inclusive Education: Implications from Sign Language Learning in VRChat},
DOI={10.1007/978-3-031-98080-0_10},
booktitle={Communications in Computer and Information Science}, publisher={Springer
Nature Switzerland}, author={Erofeeva, Maria and Klowait, Nils and Belov, Mikael
and Soulié, Yoann}, year={2025} }'
chicago: 'Erofeeva, Maria, Nils Klowait, Mikael Belov, and Yoann Soulié. “Leveraging
VR Tools for Inclusive Education: Implications from Sign Language Learning in VRChat.”
In Communications in Computer and Information Science. Cham: Springer Nature
Switzerland, 2025. https://doi.org/10.1007/978-3-031-98080-0_10.'
ieee: 'M. Erofeeva, N. Klowait, M. Belov, and Y. Soulié, “Leveraging VR Tools for Inclusive
Education: Implications from Sign Language Learning in VRChat,” in Communications
in Computer and Information Science, Cham: Springer Nature Switzerland, 2025.'
mla: 'Erofeeva, Maria, et al. “Leveraging VR Tools for Inclusive Education: Implications
from Sign Language Learning in VRChat.” Communications in Computer and Information
Science, Springer Nature Switzerland, 2025, doi:10.1007/978-3-031-98080-0_10.'
short: 'M. Erofeeva, N. Klowait, M. Belov, Y. Soulié, in: Communications in Computer
and Information Science, Springer Nature Switzerland, Cham, 2025.'
date_created: 2025-09-11T14:11:31Z
date_updated: 2025-09-11T14:11:47Z
department:
- _id: '603'
doi: 10.1007/978-3-031-98080-0_10
language:
- iso: eng
place: Cham
publication: Communications in Computer and Information Science
publication_identifier:
isbn:
- '9783031980794'
- '9783031980800'
issn:
- 1865-0929
- 1865-0937
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: 'Leveraging VR Tools for Inclusive Education: Implications from Sign Language
Learning in VRChat'
type: book_chapter
user_id: '98454'
year: '2025'
...
---
_id: '61241'
abstract:
- lang: eng
text: "Abstract\r\n Given the presence
of fake news and pseudoscience (often disguised as physics), the importance of
inoculating citizens against this type of misinformation has gained increasing
attention in education. This is a goal that all subjects should pursue equally
from their respective disciplinary perspectives. 
The paper presents a
teaching approach to protect physics students from misinformation and pseudoscience
by combining these three common strategies: First, understanding the fundamental
principles of the Nature of Science. Second, identifying techniques of Science
Denial. And third, applying heuristics for evaluating (supposedly) scientific
information. Finally, the paper offers practical suggestions for applying these
strategies in a master's-level physics course, using examples from the field of
physics."
author:
- first_name: Yvonne
full_name: Webersen, Yvonne
id: '9605'
last_name: Webersen
- first_name: Josef
full_name: Riese, Josef
id: '429'
last_name: Riese
orcid: 0000-0003-2927-2619
citation:
ama: Webersen Y, Riese J. Protecting physics students from pseudoscience - combining
strategies for a comprehensive teaching approach. European Journal of Physics.
Published online 2025. doi:10.1088/1361-6404/ae03f6
apa: Webersen, Y., & Riese, J. (2025). Protecting physics students from pseudoscience
- combining strategies for a comprehensive teaching approach. European Journal
of Physics. https://doi.org/10.1088/1361-6404/ae03f6
bibtex: '@article{Webersen_Riese_2025, title={Protecting physics students from pseudoscience
- combining strategies for a comprehensive teaching approach}, DOI={10.1088/1361-6404/ae03f6},
journal={European Journal of Physics}, publisher={IOP Publishing}, author={Webersen,
Yvonne and Riese, Josef}, year={2025} }'
chicago: Webersen, Yvonne, and Josef Riese. “Protecting Physics Students from Pseudoscience
- Combining Strategies for a Comprehensive Teaching Approach.” European Journal
of Physics, 2025. https://doi.org/10.1088/1361-6404/ae03f6.
ieee: 'Y. Webersen and J. Riese, “Protecting physics students from pseudoscience
- combining strategies for a comprehensive teaching approach,” European Journal
of Physics, 2025, doi: 10.1088/1361-6404/ae03f6.'
mla: Webersen, Yvonne, and Josef Riese. “Protecting Physics Students from Pseudoscience
- Combining Strategies for a Comprehensive Teaching Approach.” European Journal
of Physics, IOP Publishing, 2025, doi:10.1088/1361-6404/ae03f6.
short: Y. Webersen, J. Riese, European Journal of Physics (2025).
date_created: 2025-09-12T08:17:46Z
date_updated: 2025-09-12T08:21:26Z
department:
- _id: '299'
doi: 10.1088/1361-6404/ae03f6
language:
- iso: eng
publication: European Journal of Physics
publication_identifier:
issn:
- 0143-0807
- 1361-6404
publication_status: published
publisher: IOP Publishing
status: public
title: Protecting physics students from pseudoscience - combining strategies for a
comprehensive teaching approach
type: journal_article
user_id: '9605'
year: '2025'
...
---
_id: '61245'
article_number: '032404'
author:
- first_name: Franziska
full_name: Barkhausen, Franziska
id: '63631'
last_name: Barkhausen
- first_name: Laura
full_name: Ares Santos, Laura
last_name: Ares Santos
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
citation:
ama: 'Barkhausen F, Ares Santos L, Schumacher S, Sperling J. Entanglement between
dependent degrees of freedom: Quasiparticle correlations. Physical Review A.
2025;111(3). doi:10.1103/physreva.111.032404'
apa: 'Barkhausen, F., Ares Santos, L., Schumacher, S., & Sperling, J. (2025).
Entanglement between dependent degrees of freedom: Quasiparticle correlations.
Physical Review A, 111(3), Article 032404. https://doi.org/10.1103/physreva.111.032404'
bibtex: '@article{Barkhausen_Ares Santos_Schumacher_Sperling_2025, title={Entanglement
between dependent degrees of freedom: Quasiparticle correlations}, volume={111},
DOI={10.1103/physreva.111.032404},
number={3032404}, journal={Physical Review A}, publisher={American Physical Society
(APS)}, author={Barkhausen, Franziska and Ares Santos, Laura and Schumacher, Stefan
and Sperling, Jan}, year={2025} }'
chicago: 'Barkhausen, Franziska, Laura Ares Santos, Stefan Schumacher, and Jan Sperling.
“Entanglement between Dependent Degrees of Freedom: Quasiparticle Correlations.”
Physical Review A 111, no. 3 (2025). https://doi.org/10.1103/physreva.111.032404.'
ieee: 'F. Barkhausen, L. Ares Santos, S. Schumacher, and J. Sperling, “Entanglement
between dependent degrees of freedom: Quasiparticle correlations,” Physical
Review A, vol. 111, no. 3, Art. no. 032404, 2025, doi: 10.1103/physreva.111.032404.'
mla: 'Barkhausen, Franziska, et al. “Entanglement between Dependent Degrees of Freedom:
Quasiparticle Correlations.” Physical Review A, vol. 111, no. 3, 032404,
American Physical Society (APS), 2025, doi:10.1103/physreva.111.032404.'
short: F. Barkhausen, L. Ares Santos, S. Schumacher, J. Sperling, Physical Review
A 111 (2025).
date_created: 2025-09-12T10:37:34Z
date_updated: 2025-09-12T10:42:16Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '706'
- _id: '35'
- _id: '230'
- _id: '623'
- _id: '429'
doi: 10.1103/physreva.111.032404
intvolume: ' 111'
issue: '3'
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '54'
name: TRR 142 - Project Area A
- _id: '56'
name: TRR 142 - Project Area C
- _id: '61'
name: 'TRR 142; TP A04: Nichtlineare Quantenprozesstomographie und Photonik mit
Polaritonen in Mikrokavitäten'
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
publication: Physical Review A
publication_identifier:
issn:
- 2469-9926
- 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Entanglement between dependent degrees of freedom: Quasiparticle correlations'
type: journal_article
user_id: '16199'
volume: 111
year: '2025'
...
---
_id: '61246'
abstract:
- lang: eng
text: "Abstract\r\n The time-dependent
one-dimensional nonlinear Schrödinger equation (NLSE) is solved numerically by
a hybrid pseudospectral-variational quantum algorithm that connects a pseudospectral
step for the Hamiltonian term with a variational step for the nonlinear term.
The Hamiltonian term is treated as an integrating factor by forward and backward
Fourier transforms, which are here carried out classically. This split allows
us to avoid higher-order time integration schemes, to apply a first-order explicit
time stepping for the remaining nonlinear NLSE term in a variational algorithm
block, and thus to avoid numerical instabilities. We demonstrate that the analytical
solution is reproduced with a small root mean square error for a long time interval
over which a nonlinear soliton propagates significantly forward in space while
keeping its shape. We analyze the accuracy and complexity of the quantum algorithm,
the expressibility of the ansatz circuit and compare it with classical approaches.
Furthermore, we investigate the influence of algorithm parameters on the accuracy
of the results, including the temporal step width and the depth of the quantum
circuit."
article_number: '23478'
author:
- first_name: Nikolas
full_name: Köcher, Nikolas
id: '79191'
last_name: Köcher
- first_name: Hendrik
full_name: Rose, Hendrik
id: '55958'
last_name: Rose
orcid: 0000-0002-3079-5428
- first_name: Sachin S.
full_name: Bharadwaj, Sachin S.
last_name: Bharadwaj
- first_name: Jörg
full_name: Schumacher, Jörg
last_name: Schumacher
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: Köcher N, Rose H, Bharadwaj SS, Schumacher J, Schumacher S. Numerical solution
of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum
algorithm. Scientific Reports. 2025;15(1). doi:10.1038/s41598-025-05660-3
apa: Köcher, N., Rose, H., Bharadwaj, S. S., Schumacher, J., & Schumacher, S.
(2025). Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational
quantum algorithm. Scientific Reports, 15(1), Article 23478. https://doi.org/10.1038/s41598-025-05660-3
bibtex: '@article{Köcher_Rose_Bharadwaj_Schumacher_Schumacher_2025, title={Numerical
solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational
quantum algorithm}, volume={15}, DOI={10.1038/s41598-025-05660-3},
number={123478}, journal={Scientific Reports}, publisher={Springer Science and
Business Media LLC}, author={Köcher, Nikolas and Rose, Hendrik and Bharadwaj,
Sachin S. and Schumacher, Jörg and Schumacher, Stefan}, year={2025} }'
chicago: Köcher, Nikolas, Hendrik Rose, Sachin S. Bharadwaj, Jörg Schumacher, and
Stefan Schumacher. “Numerical Solution of Nonlinear Schrödinger Equation by a
Hybrid Pseudospectral-Variational Quantum Algorithm.” Scientific Reports
15, no. 1 (2025). https://doi.org/10.1038/s41598-025-05660-3.
ieee: 'N. Köcher, H. Rose, S. S. Bharadwaj, J. Schumacher, and S. Schumacher, “Numerical
solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational
quantum algorithm,” Scientific Reports, vol. 15, no. 1, Art. no. 23478,
2025, doi: 10.1038/s41598-025-05660-3.'
mla: Köcher, Nikolas, et al. “Numerical Solution of Nonlinear Schrödinger Equation
by a Hybrid Pseudospectral-Variational Quantum Algorithm.” Scientific Reports,
vol. 15, no. 1, 23478, Springer Science and Business Media LLC, 2025, doi:10.1038/s41598-025-05660-3.
short: N. Köcher, H. Rose, S.S. Bharadwaj, J. Schumacher, S. Schumacher, Scientific
Reports 15 (2025).
date_created: 2025-09-12T10:43:29Z
date_updated: 2025-09-12T10:57:22Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '35'
- _id: '230'
- _id: '27'
doi: 10.1038/s41598-025-05660-3
intvolume: ' 15'
issue: '1'
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '445'
name: Hochleistungsrechner Noctua in Paderborn
publication: Scientific Reports
publication_identifier:
issn:
- 2045-2322
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational
quantum algorithm
type: journal_article
user_id: '16199'
volume: 15
year: '2025'
...