---
_id: '59701'
citation:
ama: 'Spener AM, ed. WasserWesenWandel: Fluidität in (mehr-als-)literarischen
Medien. Sammelband zur fünften studentischen Tagung des Fachbereichs Komparatistik
an der Universität Paderborn. Universitätsbibliothek Paderborn; 2026. doi:http://dx.doi.org/10.17619/UNIPB/1-2560'
apa: 'Spener, A. M. (Ed.). (2026). WasserWesenWandel: Fluidität in (mehr-als-)literarischen
Medien. Sammelband zur fünften studentischen Tagung des Fachbereichs Komparatistik
an der Universität Paderborn. Universitätsbibliothek Paderborn. http://dx.doi.org/10.17619/UNIPB/1-2560'
bibtex: '@book{Spener_2026, place={Paderborn}, title={WasserWesenWandel: Fluidität
in (mehr-als-)literarischen Medien. Sammelband zur fünften studentischen Tagung
des Fachbereichs Komparatistik an der Universität Paderborn}, DOI={http://dx.doi.org/10.17619/UNIPB/1-2560},
publisher={Universitätsbibliothek Paderborn}, year={2026} }'
chicago: 'Spener, Anna Maria, ed. WasserWesenWandel: Fluidität in (mehr-als-)literarischen
Medien. Sammelband zur fünften studentischen Tagung des Fachbereichs Komparatistik
an der Universität Paderborn. Paderborn: Universitätsbibliothek Paderborn,
2026. http://dx.doi.org/10.17619/UNIPB/1-2560.'
ieee: 'A. M. Spener, Ed., WasserWesenWandel: Fluidität in (mehr-als-)literarischen
Medien. Sammelband zur fünften studentischen Tagung des Fachbereichs Komparatistik
an der Universität Paderborn. Paderborn: Universitätsbibliothek Paderborn,
2026.'
mla: 'Spener, Anna Maria, editor. WasserWesenWandel: Fluidität in (mehr-als-)literarischen
Medien. Sammelband zur fünften studentischen Tagung des Fachbereichs Komparatistik
an der Universität Paderborn. Universitätsbibliothek Paderborn, 2026, doi:http://dx.doi.org/10.17619/UNIPB/1-2560.'
short: 'A.M. Spener, ed., WasserWesenWandel: Fluidität in (mehr-als-)literarischen
Medien. Sammelband zur fünften studentischen Tagung des Fachbereichs Komparatistik
an der Universität Paderborn, Universitätsbibliothek Paderborn, Paderborn, 2026.'
date_created: 2025-04-28T11:32:52Z
date_updated: 2026-05-07T09:08:07Z
doi: http://dx.doi.org/10.17619/UNIPB/1-2560
editor:
- first_name: Anna Maria
full_name: Spener, Anna Maria
id: '99480'
last_name: Spener
language:
- iso: ger
main_file_link:
- open_access: '1'
url: http://dx.doi.org/10.17619/UNIPB/1-2560
oa: '1'
page: '305'
place: Paderborn
publication_status: published
publisher: Universitätsbibliothek Paderborn
status: public
title: 'WasserWesenWandel: Fluidität in (mehr-als-)literarischen Medien. Sammelband
zur fünften studentischen Tagung des Fachbereichs Komparatistik an der Universität
Paderborn'
type: book_editor
user_id: '99480'
year: '2026'
...
---
_id: '64810'
abstract:
- lang: eng
text: Grocery retailers frequently apply price discounts to stimulate demand for
expiring perishables. However, integrating these discounted sales into future
demand forecasts presents a significant challenge. This study investigates the
effectiveness of incorporating a fixed share of these sales as \textit{regular}
demand into the forecast, as commonly applied in practice. We employ a two-step
regression approach on data from a major European grocery retailer, covering over
1,700 products across 676 stores. We reveal that forecasts underestimate actual
demand for most SKUs when discounted sales occur. This residual uplift effect
is significantly influenced by the number of sales at reduced prices. Our findings
underscore the necessity for more precise approaches to integrate discounted sales
into demand forecasts, thereby preventing excess inventory and the associated
economic and environmental impacts of spoilage in the grocery sector.
author:
- first_name: David
full_name: Winkelmann, David
last_name: Winkelmann
- first_name: Theresa
full_name: Elbracht, Theresa
last_name: Elbracht
- first_name: Jonas Maximilian
full_name: Brenker, Jonas Maximilian
id: '122957'
last_name: Brenker
- first_name: Arnold
full_name: Gerzen, Arnold
last_name: Gerzen
citation:
ama: 'Winkelmann D, Elbracht T, Brenker JM, Gerzen A. Discounted Sales of Expiring
Perishables: Challenges for Demand Forecasting in Grocery Retail Practice. arXiv:260204464.
Published online 2026.'
apa: 'Winkelmann, D., Elbracht, T., Brenker, J. M., & Gerzen, A. (2026). Discounted
Sales of Expiring Perishables: Challenges for Demand Forecasting in Grocery Retail
Practice. In arXiv:2602.04464. arXiv.'
bibtex: '@article{Winkelmann_Elbracht_Brenker_Gerzen_2026, title={Discounted Sales
of Expiring Perishables: Challenges for Demand Forecasting in Grocery Retail Practice},
journal={arXiv:2602.04464}, publisher={arXiv}, author={Winkelmann, David and Elbracht,
Theresa and Brenker, Jonas Maximilian and Gerzen, Arnold}, year={2026} }'
chicago: 'Winkelmann, David, Theresa Elbracht, Jonas Maximilian Brenker, and Arnold
Gerzen. “Discounted Sales of Expiring Perishables: Challenges for Demand Forecasting
in Grocery Retail Practice.” ArXiv:2602.04464. arXiv, 2026.'
ieee: 'D. Winkelmann, T. Elbracht, J. M. Brenker, and A. Gerzen, “Discounted Sales
of Expiring Perishables: Challenges for Demand Forecasting in Grocery Retail Practice,”
arXiv:2602.04464. arXiv, 2026.'
mla: 'Winkelmann, David, et al. “Discounted Sales of Expiring Perishables: Challenges
for Demand Forecasting in Grocery Retail Practice.” ArXiv:2602.04464, arXiv,
2026.'
short: D. Winkelmann, T. Elbracht, J.M. Brenker, A. Gerzen, ArXiv:2602.04464 (2026).
date_created: 2026-03-02T13:00:32Z
date_updated: 2026-05-07T15:29:50Z
ddc:
- '330'
external_id:
arxiv:
- '2602.04464'
file:
- access_level: closed
content_type: application/pdf
creator: jbrenker
date_created: 2026-03-02T13:01:09Z
date_updated: 2026-03-02T13:01:09Z
file_id: '64811'
file_name: 2602.04464v1.pdf
file_size: 258211
relation: main_file
success: 1
file_date_updated: 2026-03-02T13:01:09Z
has_accepted_license: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/pdf/2602.04464
oa: '1'
publication: arXiv:2602.04464
publication_status: published
publisher: arXiv
status: public
title: 'Discounted Sales of Expiring Perishables: Challenges for Demand Forecasting
in Grocery Retail Practice'
type: preprint
user_id: '122957'
year: '2026'
...
---
_id: '64863'
abstract:
- lang: eng
text: 'Traditional dyadic customer-provider interactions are being shifted to polyadic
interactions involving diverse participants in digital service ecosystems. Especially,
artificial intelligence (AI) is increasingly integrated into these ecosystems,
so that they comprise non-human participants (e.g., AI-based chatbots)—fundamentally
altering the nature of value (co-)creation. While existing literature examines
human-to-human interactions, knowledge of service interactions between human actors
and AI-based systems is still underexplored. To address this research gap, we
develop a taxonomy, comprising six iterations, that explores the peculiarities
of AI as either a resource or a (non-human) agent in digital service ecosystems.
We evaluate our taxonomy using a multiple case study and derive the four archetypes
of AI in digital service ecosystems: (1) discriminative experience enhancer, (2)
protective ecosystem orchestrator, (3) ecosystem innovation companion, and (4)
personalized service composer. Our results extend the knowledge on service science
by showing how AI-based systems—discriminative or generative, and focusing on
the interaction in the ecosystem or the individual service encounter—assume the
role of resources and non-human agents. Researchers and practitioners can utilize
our results to augment their ecosystems with AI.'
article_number: '22'
author:
- first_name: Philipp
full_name: Hansmeier, Philipp
id: '55603'
last_name: Hansmeier
- first_name: Jannika Marie
full_name: Schäfer, Jannika Marie
id: '74374'
last_name: Schäfer
- first_name: Philipp
full_name: zur Heiden, Philipp
id: '64394'
last_name: zur Heiden
citation:
ama: Hansmeier P, Schäfer JM, zur Heiden P. Artificial intelligence in digital service
ecosystems—Towards a taxonomy and archetypes. Electronic Markets. 2026;36(1).
doi:10.1007/s12525-026-00879-y
apa: Hansmeier, P., Schäfer, J. M., & zur Heiden, P. (2026). Artificial intelligence
in digital service ecosystems—Towards a taxonomy and archetypes. Electronic
Markets, 36(1), Article 22. https://doi.org/10.1007/s12525-026-00879-y
bibtex: '@article{Hansmeier_Schäfer_zur Heiden_2026, title={Artificial intelligence
in digital service ecosystems—Towards a taxonomy and archetypes}, volume={36},
DOI={10.1007/s12525-026-00879-y},
number={122}, journal={Electronic Markets}, publisher={Springer Science and Business
Media LLC}, author={Hansmeier, Philipp and Schäfer, Jannika Marie and zur Heiden,
Philipp}, year={2026} }'
chicago: Hansmeier, Philipp, Jannika Marie Schäfer, and Philipp zur Heiden. “Artificial
Intelligence in Digital Service Ecosystems—Towards a Taxonomy and Archetypes.”
Electronic Markets 36, no. 1 (2026). https://doi.org/10.1007/s12525-026-00879-y.
ieee: 'P. Hansmeier, J. M. Schäfer, and P. zur Heiden, “Artificial intelligence
in digital service ecosystems—Towards a taxonomy and archetypes,” Electronic
Markets, vol. 36, no. 1, Art. no. 22, 2026, doi: 10.1007/s12525-026-00879-y.'
mla: Hansmeier, Philipp, et al. “Artificial Intelligence in Digital Service Ecosystems—Towards
a Taxonomy and Archetypes.” Electronic Markets, vol. 36, no. 1, 22, Springer
Science and Business Media LLC, 2026, doi:10.1007/s12525-026-00879-y.
short: P. Hansmeier, J.M. Schäfer, P. zur Heiden, Electronic Markets 36 (2026).
date_created: 2026-03-07T12:45:48Z
date_updated: 2026-05-09T14:42:19Z
doi: 10.1007/s12525-026-00879-y
intvolume: ' 36'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://link.springer.com/article/10.1007/s12525-026-00879-y
oa: '1'
publication: Electronic Markets
publication_identifier:
issn:
- 1019-6781
- 1422-8890
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Artificial intelligence in digital service ecosystems—Towards a taxonomy and
archetypes
type: journal_article
user_id: '55603'
volume: 36
year: '2026'
...
---
_id: '65596'
author:
- first_name: Philipp
full_name: Hansmeier, Philipp
id: '55603'
last_name: Hansmeier
- first_name: Philipp
full_name: zur Heiden, Philipp
id: '64394'
last_name: zur Heiden
citation:
ama: 'Hansmeier P, zur Heiden P. Towards a Service Ecosystem Perspective on Customer
Experience: Insights from Hybrid (Online-Offline) Customer Journeys. Behaviour
& Information Technology. Published online 2026:1-30. doi:10.1080/0144929x.2026.2666280'
apa: 'Hansmeier, P., & zur Heiden, P. (2026). Towards a Service Ecosystem Perspective
on Customer Experience: Insights from Hybrid (Online-Offline) Customer Journeys.
Behaviour & Information Technology, 1–30. https://doi.org/10.1080/0144929x.2026.2666280'
bibtex: '@article{Hansmeier_zur Heiden_2026, title={Towards a Service Ecosystem
Perspective on Customer Experience: Insights from Hybrid (Online-Offline) Customer
Journeys}, DOI={10.1080/0144929x.2026.2666280},
journal={Behaviour & Information Technology}, publisher={Informa UK Limited},
author={Hansmeier, Philipp and zur Heiden, Philipp}, year={2026}, pages={1–30}
}'
chicago: 'Hansmeier, Philipp, and Philipp zur Heiden. “Towards a Service Ecosystem
Perspective on Customer Experience: Insights from Hybrid (Online-Offline) Customer
Journeys.” Behaviour & Information Technology, 2026, 1–30. https://doi.org/10.1080/0144929x.2026.2666280.'
ieee: 'P. Hansmeier and P. zur Heiden, “Towards a Service Ecosystem Perspective
on Customer Experience: Insights from Hybrid (Online-Offline) Customer Journeys,”
Behaviour & Information Technology, pp. 1–30, 2026, doi: 10.1080/0144929x.2026.2666280.'
mla: 'Hansmeier, Philipp, and Philipp zur Heiden. “Towards a Service Ecosystem Perspective
on Customer Experience: Insights from Hybrid (Online-Offline) Customer Journeys.”
Behaviour & Information Technology, Informa UK Limited, 2026, pp. 1–30,
doi:10.1080/0144929x.2026.2666280.'
short: P. Hansmeier, P. zur Heiden, Behaviour & Information Technology (2026)
1–30.
date_created: 2026-05-09T14:31:59Z
date_updated: 2026-05-09T14:47:23Z
doi: 10.1080/0144929x.2026.2666280
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.tandfonline.com/doi/full/10.1080/0144929X.2026.2666280
oa: '1'
page: 1-30
publication: Behaviour & Information Technology
publication_identifier:
issn:
- 0144-929X
- 1362-3001
publication_status: published
publisher: Informa UK Limited
status: public
title: 'Towards a Service Ecosystem Perspective on Customer Experience: Insights from
Hybrid (Online-Offline) Customer Journeys'
type: journal_article
user_id: '55603'
year: '2026'
...
---
_id: '65521'
abstract:
- lang: eng
text: We present recent progress made towards ultra-broadband photonically assisted
analog-to-digital converters, that leverage both the low jitter of best-of-class
mode-locked lasers as well as the capability of optics to break down broadband
signals into multiple lower speed tributaries that can be better handled by electronics.
We review in particular our work on both time- and frequency-domain approaches
and give an outlook on how these architectures can be extended to include further
signal processing tasks such as equalization. Optically triggered track-and-hold
amplifiers are reported with an equivalent jitter below 80 fs rms in a signal
frequency range from 20 GHz to 70 GHz. Frequency-domain architectures implementing
optical arbitrary waveform measurement up to signal bandwidths of 610 GHz are
also shown. Finally, an architecture allowing the deserialization and equalization
of PAM4 signals is introduced and modeled for operation in 400 Gb/s links.
author:
- first_name: Jeremy
full_name: Witzens, Jeremy
last_name: Witzens
- first_name: Daniel
full_name: Drayss, Daniel
last_name: Drayss
- first_name: Dengyang
full_name: Fang, Dengyang
last_name: Fang
- first_name: Alvaro
full_name: Moscoso Mártir, Alvaro
last_name: Moscoso Mártir
- first_name: Juliana
full_name: Müller, Juliana
last_name: Müller
- first_name: Maxim
full_name: Weizel, Maxim
id: '44271'
last_name: Weizel
orcid: 0000-0003-2699-9839
- first_name: Andrea
full_name: Zazzi, Andrea
last_name: Zazzi
- first_name: Wolfgang
full_name: Freude, Wolfgang
last_name: Freude
- first_name: Christian
full_name: Koos, Christian
last_name: Koos
- first_name: Sebastian
full_name: Randel, Sebastian
last_name: Randel
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
citation:
ama: 'Witzens J, Drayss D, Fang D, et al. Ultra-Broadband Photonically Assisted
Analog-to-Digital-Converters. In: Scheytt JC, Kress C, Berroth M, Pachnicke S,
Witzens J, eds. Electronic-Photonic Integrated Systems for Ultrafast Signal
Processing. Springer Nature Switzerland; 2026. doi:10.1007/978-3-032-08340-1_3'
apa: Witzens, J., Drayss, D., Fang, D., Moscoso Mártir, A., Müller, J., Weizel,
M., Zazzi, A., Freude, W., Koos, C., Randel, S., & Scheytt, J. C. (2026).
Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters. In J. C. Scheytt,
C. Kress, M. Berroth, S. Pachnicke, & J. Witzens (Eds.), Electronic-Photonic
Integrated Systems for Ultrafast Signal Processing. Springer Nature Switzerland.
https://doi.org/10.1007/978-3-032-08340-1_3
bibtex: '@inbook{Witzens_Drayss_Fang_Moscoso Mártir_Müller_Weizel_Zazzi_Freude_Koos_Randel_et
al._2026, place={Cham}, title={Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters},
DOI={10.1007/978-3-032-08340-1_3},
booktitle={Electronic-Photonic Integrated Systems for Ultrafast Signal Processing},
publisher={Springer Nature Switzerland}, author={Witzens, Jeremy and Drayss, Daniel
and Fang, Dengyang and Moscoso Mártir, Alvaro and Müller, Juliana and Weizel,
Maxim and Zazzi, Andrea and Freude, Wolfgang and Koos, Christian and Randel, Sebastian
and et al.}, editor={Scheytt, J. Christoph and Kress, Christian and Berroth, Manfred
and Pachnicke, Stephan and Witzens, Jeremy}, year={2026} }'
chicago: 'Witzens, Jeremy, Daniel Drayss, Dengyang Fang, Alvaro Moscoso Mártir,
Juliana Müller, Maxim Weizel, Andrea Zazzi, et al. “Ultra-Broadband Photonically
Assisted Analog-to-Digital-Converters.” In Electronic-Photonic Integrated Systems
for Ultrafast Signal Processing, edited by J. Christoph Scheytt, Christian
Kress, Manfred Berroth, Stephan Pachnicke, and Jeremy Witzens. Cham: Springer
Nature Switzerland, 2026. https://doi.org/10.1007/978-3-032-08340-1_3.'
ieee: 'J. Witzens et al., “Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters,”
in Electronic-Photonic Integrated Systems for Ultrafast Signal Processing,
J. C. Scheytt, C. Kress, M. Berroth, S. Pachnicke, and J. Witzens, Eds. Cham:
Springer Nature Switzerland, 2026.'
mla: Witzens, Jeremy, et al. “Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters.”
Electronic-Photonic Integrated Systems for Ultrafast Signal Processing,
edited by J. Christoph Scheytt et al., Springer Nature Switzerland, 2026, doi:10.1007/978-3-032-08340-1_3.
short: 'J. Witzens, D. Drayss, D. Fang, A. Moscoso Mártir, J. Müller, M. Weizel,
A. Zazzi, W. Freude, C. Koos, S. Randel, J.C. Scheytt, in: J.C. Scheytt, C. Kress,
M. Berroth, S. Pachnicke, J. Witzens (Eds.), Electronic-Photonic Integrated Systems
for Ultrafast Signal Processing, Springer Nature Switzerland, Cham, 2026.'
date_created: 2026-04-30T06:07:38Z
date_updated: 2026-05-11T07:56:04Z
department:
- _id: '58'
- _id: '623'
doi: 10.1007/978-3-032-08340-1_3
editor:
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
last_name: Scheytt
- first_name: Christian
full_name: Kress, Christian
last_name: Kress
- first_name: Manfred
full_name: Berroth, Manfred
last_name: Berroth
- first_name: Stephan
full_name: Pachnicke, Stephan
last_name: Pachnicke
- first_name: Jeremy
full_name: Witzens, Jeremy
last_name: Witzens
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://link.springer.com/content/pdf/10.1007/978-3-032-08340-1.pdf
oa: '1'
place: Cham
project:
- _id: '303'
name: 'SPP 2111; TP: Ultrabreitbandiger Photonisch-Elektronischer Analog-Digital-Wandler
(PACE) - Phase 2'
publication: Electronic-Photonic Integrated Systems for Ultrafast Signal Processing
publication_identifier:
isbn:
- '9783032083395'
- '9783032083401'
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters
type: book_chapter
user_id: '44271'
year: '2026'
...
---
_id: '65600'
abstract:
- lang: eng
text: Integrated photonic-assisted signal processing has multiple applications such
as signal amplification, multiplexing, and high-Q filtering in optical communication
systems, optical sensing systems, and also microwave photonics. We will review
recent works on integrated photonic-assisted signal processing for sinc-shaped
Nyquist pulse generation, high-bandwidth Nyquist signal detection with low bandwidth
devices, arbitrary waveform generation and measurement, and on-chip photonic frequency
decoding. However, in such photonic integrated circuits (PICs), the photonic components
are placed very close to each other on the chip, resulting in thermal crosstalk
which degrades the system performance. Air-filled oxide and deep trench designs
have proven to be very effective in mitigating the thermal crosstalk for various
frequently deployed photonic devices like Mach-Zehnder modulators (MZMs), ring
resonators, optical switches, and photodetectors designed on a standard silicon-on-insulator
(SOI) platform. In this chapter, we will additionally review the basics of optical
signal processing and some results for such trench-enhanced thermal crosstalk
resilient circuits.
author:
- first_name: Souvaraj
full_name: De, Souvaraj
last_name: De
- first_name: Younus
full_name: Mandalawi, Younus
last_name: Mandalawi
- first_name: Ranjan
full_name: Das, Ranjan
last_name: Das
- first_name: Maxim
full_name: Weizel, Maxim
id: '44271'
last_name: Weizel
orcid: 0000-0003-2699-9839
citation:
ama: 'De S, Mandalawi Y, Das R, Weizel M. Integrated Photonic-Assisted Signal Processing
and Thermal Crosstalk. In: Metrology for THz Communications. Springer Nature
Switzerland; 2026. doi:10.1007/978-3-032-01986-8_20'
apa: De, S., Mandalawi, Y., Das, R., & Weizel, M. (2026). Integrated Photonic-Assisted
Signal Processing and Thermal Crosstalk. In Metrology for THz Communications.
Springer Nature Switzerland. https://doi.org/10.1007/978-3-032-01986-8_20
bibtex: '@inbook{De_Mandalawi_Das_Weizel_2026, place={Cham}, title={Integrated Photonic-Assisted
Signal Processing and Thermal Crosstalk}, DOI={10.1007/978-3-032-01986-8_20},
booktitle={Metrology for THz Communications}, publisher={Springer Nature Switzerland},
author={De, Souvaraj and Mandalawi, Younus and Das, Ranjan and Weizel, Maxim},
year={2026} }'
chicago: 'De, Souvaraj, Younus Mandalawi, Ranjan Das, and Maxim Weizel. “Integrated
Photonic-Assisted Signal Processing and Thermal Crosstalk.” In Metrology for
THz Communications. Cham: Springer Nature Switzerland, 2026. https://doi.org/10.1007/978-3-032-01986-8_20.'
ieee: 'S. De, Y. Mandalawi, R. Das, and M. Weizel, “Integrated Photonic-Assisted
Signal Processing and Thermal Crosstalk,” in Metrology for THz Communications,
Cham: Springer Nature Switzerland, 2026.'
mla: De, Souvaraj, et al. “Integrated Photonic-Assisted Signal Processing and Thermal
Crosstalk.” Metrology for THz Communications, Springer Nature Switzerland,
2026, doi:10.1007/978-3-032-01986-8_20.
short: 'S. De, Y. Mandalawi, R. Das, M. Weizel, in: Metrology for THz Communications,
Springer Nature Switzerland, Cham, 2026.'
date_created: 2026-05-11T07:38:38Z
date_updated: 2026-05-11T07:54:32Z
department:
- _id: '58'
doi: 10.1007/978-3-032-01986-8_20
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://link.springer.com/content/pdf/10.1007/978-3-032-01986-8.pdf
oa: '1'
place: Cham
project:
- _id: '298'
name: 'FOR 2863: Metrologie für die THz Kommunikation (Meteracom)'
- _id: '308'
name: 'FOR 2863: Metrologie für die THz Kommunikation, TP: Ultrabreitbandige Abtastung'
- _id: '313'
name: 'FOR 2863: Metrologie für die THz Kommunikation, TP C3: Skalierbares THz
Transceiver Impairment Modell'
publication: Metrology for THz Communications
publication_identifier:
isbn:
- '9783032019851'
- '9783032019868'
issn:
- 0342-4111
- 1556-1534
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: Integrated Photonic-Assisted Signal Processing and Thermal Crosstalk
type: book_chapter
user_id: '44271'
year: '2026'
...
---
_id: '65601'
abstract:
- lang: eng
text: High-speed ADCs operating in the tens of gigahertz up to potentially terahertz
range are largely constrained by the jitter in their clock sources. By incorporating
photonically assisted samplers that exploit the ultralow jitter of specific mode-locked
lasers (MLLs) as analogue ADC frontends, the performance limits of data converters
can be pushed to achieve unprecedented levels of accuracy. Continuous advancements
in electronic-photonic integration (silicon photonics) are clearing the path for
integrating these systems on a chip scale, thereby leading to increased scalability,
as well as reduced cost and power consumption.
author:
- first_name: Maxim
full_name: Weizel, Maxim
id: '44271'
last_name: Weizel
orcid: 0000-0003-2699-9839
- first_name: Meysam
full_name: Bahmanian, Meysam
id: '69233'
last_name: Bahmanian
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
citation:
ama: 'Weizel M, Bahmanian M, Scheytt JC. Integrated Photonically Assisted Samplers.
In: Metrology for THz Communications. Springer Nature Switzerland; 2026.
doi:10.1007/978-3-032-01986-8_29'
apa: Weizel, M., Bahmanian, M., & Scheytt, J. C. (2026). Integrated Photonically
Assisted Samplers. In Metrology for THz Communications. Springer Nature
Switzerland. https://doi.org/10.1007/978-3-032-01986-8_29
bibtex: '@inbook{Weizel_Bahmanian_Scheytt_2026, place={Cham}, title={Integrated
Photonically Assisted Samplers}, DOI={10.1007/978-3-032-01986-8_29},
booktitle={Metrology for THz Communications}, publisher={Springer Nature Switzerland},
author={Weizel, Maxim and Bahmanian, Meysam and Scheytt, J. Christoph}, year={2026}
}'
chicago: 'Weizel, Maxim, Meysam Bahmanian, and J. Christoph Scheytt. “Integrated
Photonically Assisted Samplers.” In Metrology for THz Communications. Cham:
Springer Nature Switzerland, 2026. https://doi.org/10.1007/978-3-032-01986-8_29.'
ieee: 'M. Weizel, M. Bahmanian, and J. C. Scheytt, “Integrated Photonically Assisted
Samplers,” in Metrology for THz Communications, Cham: Springer Nature Switzerland,
2026.'
mla: Weizel, Maxim, et al. “Integrated Photonically Assisted Samplers.” Metrology
for THz Communications, Springer Nature Switzerland, 2026, doi:10.1007/978-3-032-01986-8_29.
short: 'M. Weizel, M. Bahmanian, J.C. Scheytt, in: Metrology for THz Communications,
Springer Nature Switzerland, Cham, 2026.'
date_created: 2026-05-11T07:51:04Z
date_updated: 2026-05-11T07:58:06Z
department:
- _id: '58'
doi: 10.1007/978-3-032-01986-8_29
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://link.springer.com/content/pdf/10.1007/978-3-032-01986-8.pdf
oa: '1'
place: Cham
project:
- _id: '298'
name: 'FOR 2863: Metrologie für die THz Kommunikation (Meteracom)'
- _id: '308'
name: 'FOR 2863: Metrologie für die THz Kommunikation, TP: Ultrabreitbandige Abtastung'
- _id: '313'
name: 'FOR 2863: Metrologie für die THz Kommunikation, TP C3: Skalierbares THz
Transceiver Impairment Modell'
publication: Metrology for THz Communications
publication_identifier:
isbn:
- '9783032019851'
- '9783032019868'
issn:
- 0342-4111
- 1556-1534
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: Integrated Photonically Assisted Samplers
type: book_chapter
user_id: '44271'
year: '2026'
...
---
_id: '65602'
abstract:
- lang: eng
text: This chapter explores the crucial role of simulation and modelling of electronic
and photonic components for terahertz (THz) systems. THz-related challenges already
begin with setting up the signal generation and sampling parameters and continue
with the realistic modelling of the electronic and photonic building blocks. Hereby,
photonic components require not only the modelling of the optical signal propagation
but also the modelling of the electronic interface in the THz regime. Furthermore,
when advancing to the simulation of systems like fully integrated electronic transmit
and receive frontends or photonically assisted analogue-to-digital converters
(ADCs), it is up to the designer to find a suitable level of abstraction. Size,
complexity, and available computational power versus accuracy must be taken into
consideration and prioritized against each other.
author:
- first_name: Dominik
full_name: Wrana, Dominik
last_name: Wrana
- first_name: Maxim
full_name: Weizel, Maxim
last_name: Weizel
- first_name: Simon
full_name: Haussmann, Simon
last_name: Haussmann
- first_name: Meysam
full_name: Bahmanian, Meysam
last_name: Bahmanian
- first_name: Ingmar
full_name: Kallfass, Ingmar
last_name: Kallfass
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
last_name: Scheytt
citation:
ama: 'Wrana D, Weizel M, Haussmann S, Bahmanian M, Kallfass I, Scheytt JC. Simulation
and Modelling of Electronic and Photonic Components. In: Metrology for THz
Communications. Springer Nature Switzerland; 2026. doi:10.1007/978-3-032-01986-8_36'
apa: Wrana, D., Weizel, M., Haussmann, S., Bahmanian, M., Kallfass, I., & Scheytt,
J. C. (2026). Simulation and Modelling of Electronic and Photonic Components.
In Metrology for THz Communications. Springer Nature Switzerland. https://doi.org/10.1007/978-3-032-01986-8_36
bibtex: '@inbook{Wrana_Weizel_Haussmann_Bahmanian_Kallfass_Scheytt_2026, place={Cham},
title={Simulation and Modelling of Electronic and Photonic Components}, DOI={10.1007/978-3-032-01986-8_36},
booktitle={Metrology for THz Communications}, publisher={Springer Nature Switzerland},
author={Wrana, Dominik and Weizel, Maxim and Haussmann, Simon and Bahmanian, Meysam
and Kallfass, Ingmar and Scheytt, J. Christoph}, year={2026} }'
chicago: 'Wrana, Dominik, Maxim Weizel, Simon Haussmann, Meysam Bahmanian, Ingmar
Kallfass, and J. Christoph Scheytt. “Simulation and Modelling of Electronic and
Photonic Components.” In Metrology for THz Communications. Cham: Springer
Nature Switzerland, 2026. https://doi.org/10.1007/978-3-032-01986-8_36.'
ieee: 'D. Wrana, M. Weizel, S. Haussmann, M. Bahmanian, I. Kallfass, and J. C. Scheytt,
“Simulation and Modelling of Electronic and Photonic Components,” in Metrology
for THz Communications, Cham: Springer Nature Switzerland, 2026.'
mla: Wrana, Dominik, et al. “Simulation and Modelling of Electronic and Photonic
Components.” Metrology for THz Communications, Springer Nature Switzerland,
2026, doi:10.1007/978-3-032-01986-8_36.
short: 'D. Wrana, M. Weizel, S. Haussmann, M. Bahmanian, I. Kallfass, J.C. Scheytt,
in: Metrology for THz Communications, Springer Nature Switzerland, Cham, 2026.'
date_created: 2026-05-11T07:58:34Z
date_updated: 2026-05-11T09:28:52Z
department:
- _id: '58'
doi: 10.1007/978-3-032-01986-8_36
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://link.springer.com/content/pdf/10.1007/978-3-032-01986-8.pdf
oa: '1'
place: Cham
project:
- _id: '298'
name: 'FOR 2863: Metrologie für die THz Kommunikation (Meteracom)'
- _id: '308'
name: 'FOR 2863: Metrologie für die THz Kommunikation, TP: Ultrabreitbandige Abtastung'
- _id: '313'
name: 'FOR 2863: Metrologie für die THz Kommunikation, TP C3: Skalierbares THz
Transceiver Impairment Modell'
publication: Metrology for THz Communications
publication_identifier:
isbn:
- '9783032019851'
- '9783032019868'
issn:
- 0342-4111
- 1556-1534
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: Simulation and Modelling of Electronic and Photonic Components
type: book_chapter
user_id: '44271'
year: '2026'
...
---
_id: '65153'
article_type: original
author:
- first_name: Lorenz
full_name: Butzhammer, Lorenz
last_name: Butzhammer
citation:
ama: Butzhammer L. Conversion between detector- and rotary-table-related misalignment
parameterisations for unified projection-matrix-based geometry calibration in
dimensional X-ray computed tomography. Precision Engineering. 2026;100:377-400.
doi:10.1016/j.precisioneng.2026.03.015
apa: Butzhammer, L. (2026). Conversion between detector- and rotary-table-related
misalignment parameterisations for unified projection-matrix-based geometry calibration
in dimensional X-ray computed tomography. Precision Engineering, 100,
377–400. https://doi.org/10.1016/j.precisioneng.2026.03.015
bibtex: '@article{Butzhammer_2026, title={Conversion between detector- and rotary-table-related
misalignment parameterisations for unified projection-matrix-based geometry calibration
in dimensional X-ray computed tomography}, volume={100}, DOI={10.1016/j.precisioneng.2026.03.015},
journal={Precision Engineering}, publisher={Elsevier BV}, author={Butzhammer,
Lorenz}, year={2026}, pages={377–400} }'
chicago: 'Butzhammer, Lorenz. “Conversion between Detector- and Rotary-Table-Related
Misalignment Parameterisations for Unified Projection-Matrix-Based Geometry Calibration
in Dimensional X-Ray Computed Tomography.” Precision Engineering 100 (2026):
377–400. https://doi.org/10.1016/j.precisioneng.2026.03.015.'
ieee: 'L. Butzhammer, “Conversion between detector- and rotary-table-related misalignment
parameterisations for unified projection-matrix-based geometry calibration in
dimensional X-ray computed tomography,” Precision Engineering, vol. 100,
pp. 377–400, 2026, doi: 10.1016/j.precisioneng.2026.03.015.'
mla: Butzhammer, Lorenz. “Conversion between Detector- and Rotary-Table-Related
Misalignment Parameterisations for Unified Projection-Matrix-Based Geometry Calibration
in Dimensional X-Ray Computed Tomography.” Precision Engineering, vol.
100, Elsevier BV, 2026, pp. 377–400, doi:10.1016/j.precisioneng.2026.03.015.
short: L. Butzhammer, Precision Engineering 100 (2026) 377–400.
date_created: 2026-03-26T15:25:23Z
date_updated: 2026-05-12T11:38:52Z
department:
- _id: '630'
doi: 10.1016/j.precisioneng.2026.03.015
intvolume: ' 100'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/S0141635926000851/pdfft?md5=5f0cd152522e4ff286a245f033269774&pid=1-s2.0-S0141635926000851-main.pdf
oa: '1'
page: 377-400
project:
- _id: '133'
name: TRR 285 - Project Area C
- _id: '149'
name: TRR 285 - Subproject C05
- _id: '130'
name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
publication: Precision Engineering
publication_identifier:
issn:
- 0141-6359
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Conversion between detector- and rotary-table-related misalignment parameterisations
for unified projection-matrix-based geometry calibration in dimensional X-ray computed
tomography
type: journal_article
user_id: '7850'
volume: 100
year: '2026'
...
---
_id: '61441'
abstract:
- lang: ger
text: "Das hochschuldidaktische Konzept des Forschenden Lernens gilt als zentrales
Element der universitären Lehrkräftebildung in Deutschland und ist in fast allen
Bundesländern Bestandteil des Praxissemesters. Damit einhergehende Erwartungen
im Hinblick auf den Professionalisierungsprozess von Lehrkräften fokussieren insbesondere
die Vermittlung einer forschenden Grundhaltung, die auf eine nicht-wissenschaftsferne
Berufsausübung abzielt. Wir fassen die forschende Grundhaltung als Professionsüberzeugung,
die aus einer kognitiven, affektiven und handlungsbezogenen Komponente besteht
und untersuchen die Komponenten im Zusammenspiel sowie im Längsschnitt.\r\n
\ Mittels teilstrukturierter Interviews mit 22 angehenden Lehrkräften
im Referendariat und Berufseinstieg, die sich im Praxissemester mit Forschendem
Lernen befasst haben, werden das Verständnis (kognitive Komponente) und die Bedeutsamkeit
(affektive und handlungsbezogene Komponente) Forschenden Lernens in der jeweiligen
Ausbildungs- bzw. Berufsphase erfragt. Die Daten werden inhaltsanalytisch sowie
typenbildend ausgewertet, um das Verständnis und die Bedeutsamkeit in der jeweiligen
Phase, längsschnittliche Entwicklungen sowie das Verhältnis von Verständnis und
Bedeutsamkeit herauszuarbeiten. Die Befunde zeigen, dass die Verständnisse von
Forschendem Lernen sowohl im Referendariat als auch im Berufseinstieg variieren.
Zudem ist das Konzept – laut Schilderungen der Befragten – durchaus bedeutsam
für ihre Lern- und Handlungspraxis, jedoch nicht für alle und in unterschiedlich
ausgeprägter Form. Die Typenbildung verdeutlicht, dass die fehlende Bedeutsamkeit
Forschenden Lernens mit Fehlkonzepten einhergeht und eine höhere Bedeutsamkeit
erkennbar ist, wenn Adaptionsleistungen hinsichtlich des Konzepts vorgenommen
werden. Insgesamt ist im Sinne der Auffassung als Professionsüberzeugung die Anbahnung
einer forschenden Grundhaltung bei einigen Befragten erkennbar. Implikationen
für eine künftige Hochschulbildung ergeben sich u. a. mit Blick auf die Unterstützung
von Studierenden bei Adaptionsleistungen für die (jeweilige) Praxis."
alternative_title:
- Perspectives of prospective teachers on research-based learning—a qualitative longitudinal
study during teacher training and career entry
author:
- first_name: Martina
full_name: Homt, Martina
id: '11674'
last_name: Homt
- first_name: Bea
full_name: Bloh, Bea
id: '69910'
last_name: Bloh
- first_name: Janis
full_name: Wehde, Janis
id: '82257'
last_name: Wehde
orcid: 0009-0008-0720-7828
citation:
ama: Homt M, Bloh B, Wehde J. Perspektiven angehender Lehrkräfte auf Forschendes
Lernen – eine qualitative Längsschnittstudie im Referendariat und Berufseinstieg.
Zeitschrift für Bildungsforschung. Published online 2026. doi:10.1007/s35834-025-00506-4
apa: Homt, M., Bloh, B., & Wehde, J. (2026). Perspektiven angehender Lehrkräfte
auf Forschendes Lernen – eine qualitative Längsschnittstudie im Referendariat
und Berufseinstieg. Zeitschrift für Bildungsforschung. https://doi.org/10.1007/s35834-025-00506-4
bibtex: '@article{Homt_Bloh_Wehde_2026, title={Perspektiven angehender Lehrkräfte
auf Forschendes Lernen – eine qualitative Längsschnittstudie im Referendariat
und Berufseinstieg}, DOI={10.1007/s35834-025-00506-4},
journal={Zeitschrift für Bildungsforschung}, publisher={Springer Science and Business
Media LLC}, author={Homt, Martina and Bloh, Bea and Wehde, Janis}, year={2026}
}'
chicago: Homt, Martina, Bea Bloh, and Janis Wehde. “Perspektiven angehender Lehrkräfte
auf Forschendes Lernen – eine qualitative Längsschnittstudie im Referendariat
und Berufseinstieg.” Zeitschrift für Bildungsforschung, 2026. https://doi.org/10.1007/s35834-025-00506-4.
ieee: 'M. Homt, B. Bloh, and J. Wehde, “Perspektiven angehender Lehrkräfte auf Forschendes
Lernen – eine qualitative Längsschnittstudie im Referendariat und Berufseinstieg,”
Zeitschrift für Bildungsforschung, 2026, doi: 10.1007/s35834-025-00506-4.'
mla: Homt, Martina, et al. “Perspektiven angehender Lehrkräfte auf Forschendes Lernen –
eine qualitative Längsschnittstudie im Referendariat und Berufseinstieg.” Zeitschrift
für Bildungsforschung, Springer Science and Business Media LLC, 2026, doi:10.1007/s35834-025-00506-4.
short: M. Homt, B. Bloh, J. Wehde, Zeitschrift für Bildungsforschung (2026).
date_created: 2025-09-25T08:41:00Z
date_updated: 2026-05-13T11:04:50Z
department:
- _id: '456'
- _id: '43'
doi: 10.1007/s35834-025-00506-4
language:
- iso: ger
main_file_link:
- open_access: '1'
url: https://doi.org/10.1007/s35834-025-00506-4
oa: '1'
publication: Zeitschrift für Bildungsforschung
publication_identifier:
issn:
- 2190-6890
- 2190-6904
publication_status: published
publisher: Springer Science and Business Media LLC
quality_controlled: '1'
status: public
title: Perspektiven angehender Lehrkräfte auf Forschendes Lernen – eine qualitative
Längsschnittstudie im Referendariat und Berufseinstieg
type: journal_article
user_id: '11674'
year: '2026'
...
---
_id: '65606'
abstract:
- lang: eng
text: Sound capture by microphone arrays opens the possibility to exploit spatial,
in addition to spectral, information for diarization and signal enhancement, two
important tasks in meeting transcription. However, there is no one-to-one mapping
of positions in space to speakers if speakers move. Here, we address this by proposing
a novel joint spatial and spectral mixture model, whose two submodels are loosely
coupled by modeling the relationship between speaker and position index probabilistically.
Thus, spatial and spectral information can be jointly exploited, while at the
same time allowing for speakers speaking from different positions. Experiments
on the LibriCSS data set with simulated speaker position changes show great improvements
over tightly coupled subsystems.
author:
- first_name: Adrian Tobias
full_name: Meise, Adrian Tobias
id: '79268'
last_name: Meise
- first_name: Tobias
full_name: Cord-Landwehr, Tobias
id: '44393'
last_name: Cord-Landwehr
- first_name: Christoph
full_name: Boeddeker, Christoph
id: '40767'
last_name: Boeddeker
- first_name: Marc
full_name: Delcroix, Marc
last_name: Delcroix
- first_name: Tomohiro
full_name: Nakatani, Tomohiro
last_name: Nakatani
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Meise AT, Cord-Landwehr T, Boeddeker C, Delcroix M, Nakatani T, Haeb-Umbach
R. Loose Coupling of Spectral and Spatial Models for Multi-Channel Diarization
and Enhancement of Meetings in Dynamic Environments. In: ICASSP 2026 - 2026
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP).
IEEE; 2026. doi:10.1109/icassp55912.2026.11463540'
apa: Meise, A. T., Cord-Landwehr, T., Boeddeker, C., Delcroix, M., Nakatani, T.,
& Haeb-Umbach, R. (2026). Loose Coupling of Spectral and Spatial Models for
Multi-Channel Diarization and Enhancement of Meetings in Dynamic Environments.
ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech and Signal
Processing (ICASSP). 2026 IEEE International Conference on Acoustics, Speech
and Signal Processing (ICASSP) , Barcelona. https://doi.org/10.1109/icassp55912.2026.11463540
bibtex: '@inproceedings{Meise_Cord-Landwehr_Boeddeker_Delcroix_Nakatani_Haeb-Umbach_2026,
title={Loose Coupling of Spectral and Spatial Models for Multi-Channel Diarization
and Enhancement of Meetings in Dynamic Environments}, DOI={10.1109/icassp55912.2026.11463540},
booktitle={ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech
and Signal Processing (ICASSP)}, publisher={IEEE}, author={Meise, Adrian Tobias
and Cord-Landwehr, Tobias and Boeddeker, Christoph and Delcroix, Marc and Nakatani,
Tomohiro and Haeb-Umbach, Reinhold}, year={2026} }'
chicago: Meise, Adrian Tobias, Tobias Cord-Landwehr, Christoph Boeddeker, Marc Delcroix,
Tomohiro Nakatani, and Reinhold Haeb-Umbach. “Loose Coupling of Spectral and Spatial
Models for Multi-Channel Diarization and Enhancement of Meetings in Dynamic Environments.”
In ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech and
Signal Processing (ICASSP). IEEE, 2026. https://doi.org/10.1109/icassp55912.2026.11463540.
ieee: 'A. T. Meise, T. Cord-Landwehr, C. Boeddeker, M. Delcroix, T. Nakatani, and
R. Haeb-Umbach, “Loose Coupling of Spectral and Spatial Models for Multi-Channel
Diarization and Enhancement of Meetings in Dynamic Environments,” presented at
the 2026 IEEE International Conference on Acoustics, Speech and Signal Processing
(ICASSP) , Barcelona, 2026, doi: 10.1109/icassp55912.2026.11463540.'
mla: Meise, Adrian Tobias, et al. “Loose Coupling of Spectral and Spatial Models
for Multi-Channel Diarization and Enhancement of Meetings in Dynamic Environments.”
ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech and Signal
Processing (ICASSP), IEEE, 2026, doi:10.1109/icassp55912.2026.11463540.
short: 'A.T. Meise, T. Cord-Landwehr, C. Boeddeker, M. Delcroix, T. Nakatani, R.
Haeb-Umbach, in: ICASSP 2026 - 2026 IEEE International Conference on Acoustics,
Speech and Signal Processing (ICASSP), IEEE, 2026.'
conference:
location: Barcelona
name: ' 2026 IEEE International Conference on Acoustics, Speech and Signal Processing
(ICASSP) '
date_created: 2026-05-11T14:20:48Z
date_updated: 2026-05-15T08:17:25Z
department:
- _id: '54'
- _id: '1063'
doi: 10.1109/icassp55912.2026.11463540
external_id:
arxiv:
- https://arxiv.org/abs/2601.16077
keyword:
- mixture models
- meeting processing
- diarization
- source separation
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/pdf/2601.16077
oa: '1'
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech
and Signal Processing (ICASSP)
publisher: IEEE
status: public
title: Loose Coupling of Spectral and Spatial Models for Multi-Channel Diarization
and Enhancement of Meetings in Dynamic Environments
type: conference
user_id: '79268'
year: '2026'
...
---
_id: '65631'
abstract:
- lang: eng
text: "Abstract\r\n \r\n Mathematics
textbooks used to be the key resource for students’ self-regulated learning of
mathematics. Primarily due to the digitalization of society, students have potentially
greater access to a wider range of resources such as internet search engines,
learning platforms, educational videos, and Generative AI. This study investigates
the role of the mathematics textbook in comparison to other resources within students’
self-regulated learning practices. Data were collected via a survey of 1101 German
secondary students, representing three school types (\r\n Gymnasium\r\n
\ ,\r\n Gesamtschule\r\n
\ ,\r\n Realschule\r\n
\ ) and three grade levels (6, 9, and upper secondary). The
questionnaire assessed the frequency of resource use in and outside class, reasons
and purposes of use, and resource-based strategies when facing learning challenges
outside class. Results show that the printed mathematics textbook is the most
frequently used resource both in class and outside class. The textbook remains
the most relevant resource for key purposes, such as an aid for doing homework
and preparing for tests and exams. However, its dominance diminishes with age:
in upper secondary school, students increasingly rely on self-created notes, and
online resources. Correlation analyses reveal moderate to strong links between
in-class and out-of-class use, suggesting an association between resource use
and classroom culture. The findings underscore the textbook’s enduring centrality
as a foundational, trusted resource within a dynamic and increasingly diverse
learning environment. This study calls for pedagogical approaches that integrate
textbooks more intentionally within broader resource systems, supporting students’
agency and strategic resource selection in an era of digital abundance.\r\n "
article_type: original
author:
- first_name: Lea
full_name: Stallmeister, Lea
id: '63369'
last_name: Stallmeister
- first_name: Sebastian
full_name: Rezat, Sebastian
id: '31132'
last_name: Rezat
citation:
ama: Stallmeister L, Rezat S. The role of the mathematics textbook in times of resource
diversity. Educational Studies in Mathematics. Published online 2026. doi:10.1007/s10649-026-10511-7
apa: Stallmeister, L., & Rezat, S. (2026). The role of the mathematics textbook
in times of resource diversity. Educational Studies in Mathematics. https://doi.org/10.1007/s10649-026-10511-7
bibtex: '@article{Stallmeister_Rezat_2026, title={The role of the mathematics textbook
in times of resource diversity}, DOI={10.1007/s10649-026-10511-7},
journal={Educational Studies in Mathematics}, publisher={Springer Science and
Business Media LLC}, author={Stallmeister, Lea and Rezat, Sebastian}, year={2026}
}'
chicago: Stallmeister, Lea, and Sebastian Rezat. “The Role of the Mathematics Textbook
in Times of Resource Diversity.” Educational Studies in Mathematics, 2026.
https://doi.org/10.1007/s10649-026-10511-7.
ieee: 'L. Stallmeister and S. Rezat, “The role of the mathematics textbook in times
of resource diversity,” Educational Studies in Mathematics, 2026, doi:
10.1007/s10649-026-10511-7.'
mla: Stallmeister, Lea, and Sebastian Rezat. “The Role of the Mathematics Textbook
in Times of Resource Diversity.” Educational Studies in Mathematics, Springer
Science and Business Media LLC, 2026, doi:10.1007/s10649-026-10511-7.
short: L. Stallmeister, S. Rezat, Educational Studies in Mathematics (2026).
date_created: 2026-05-17T14:32:31Z
date_updated: 2026-05-17T14:40:54Z
ddc:
- '370'
department:
- _id: '360'
doi: 10.1007/s10649-026-10511-7
keyword:
- mathematics
- textbooks
- userstudy
- resources
- digital resources
- students
- secondary eduction
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1007/s10649-026-10511-7
oa: '1'
publication: Educational Studies in Mathematics
publication_identifier:
issn:
- 0013-1954
- 1573-0816
publication_status: published
publisher: Springer Science and Business Media LLC
quality_controlled: '1'
status: public
title: The role of the mathematics textbook in times of resource diversity
type: journal_article
user_id: '31132'
year: '2026'
...
---
_id: '65630'
abstract:
- lang: eng
text: 'Mathematics textbooks used to be the key resource for students’ self-regulated
learning of mathematics. Primarily due to the digitalization of society, students
have potentially greater access to a wider range of resources such as internet
search engines, learning platforms, educational videos, and Generative AI. This
study investigates the role of the mathematics textbook in comparison to other
resources within students’ self-regulated learning practices. Data were collected
via a survey of 1101 German secondary students, representing three school types
(Gymnasium, Gesamtschule, Realschule) and three grade levels (6, 9, and upper
secondary). The questionnaire assessed the frequency of resource use in and outside
class, reasons and purposes of use, and resource-based strategies when facing
learning challenges outside class. Results show that the printed mathematics textbook
is the most frequently used resource both in class and outside class. The textbook
remains the most relevant resource for key purposes, such as an aid for doing
homework and preparing for tests and exams. However, its dominance diminishes
with age: in upper secondary school, students increasingly rely on self-created
notes, and online resources. Correlation analyses reveal moderate to strong links
between in-class and out-of-class use, suggesting an association between resource
use and classroom culture. The findings underscore the textbook’s enduring centrality
as a foundational, trusted resource within a dynamic and increasingly diverse
learning environment. This study calls for pedagogical approaches that integrate
textbooks more intentionally within broader resource systems, supporting students’
agency and strategic resource selection in an era of digital abundance.'
author:
- first_name: Lea
full_name: Stallmeister, Lea
last_name: Stallmeister
- first_name: Sebastian
full_name: Rezat, Sebastian
last_name: Rezat
citation:
ama: Stallmeister L, Rezat S. The role of the mathematics textbook in times of resource
diversity. Educational Studies in Mathematics. Published online 2026. doi:10.1007/s10649-026-10511-7
apa: Stallmeister, L., & Rezat, S. (2026). The role of the mathematics textbook
in times of resource diversity. Educational Studies in Mathematics. https://doi.org/10.1007/s10649-026-10511-7
bibtex: '@article{Stallmeister_Rezat_2026, title={The role of the mathematics textbook
in times of resource diversity}, DOI={10.1007/s10649-026-10511-7},
journal={Educational Studies in Mathematics}, publisher={Springer}, author={Stallmeister,
Lea and Rezat, Sebastian}, year={2026} }'
chicago: Stallmeister, Lea, and Sebastian Rezat. “The Role of the Mathematics Textbook
in Times of Resource Diversity.” Educational Studies in Mathematics, 2026.
https://doi.org/10.1007/s10649-026-10511-7.
ieee: 'L. Stallmeister and S. Rezat, “The role of the mathematics textbook in times
of resource diversity,” Educational Studies in Mathematics, 2026, doi:
10.1007/s10649-026-10511-7.'
mla: Stallmeister, Lea, and Sebastian Rezat. “The Role of the Mathematics Textbook
in Times of Resource Diversity.” Educational Studies in Mathematics, Springer,
2026, doi:10.1007/s10649-026-10511-7.
short: L. Stallmeister, S. Rezat, Educational Studies in Mathematics (2026).
date_created: 2026-05-16T14:27:57Z
date_updated: 2026-05-16T14:33:38Z
department:
- _id: '98'
doi: 10.1007/s10649-026-10511-7
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1007/s10649-026-10511-7
oa: '1'
publication: Educational Studies in Mathematics
publication_status: published
publisher: Springer
status: public
title: The role of the mathematics textbook in times of resource diversity
type: journal_article
user_id: '63369'
year: '2026'
...
---
_id: '65682'
author:
- first_name: Mats
full_name: Vernholz, Mats
id: '76955'
last_name: Vernholz
orcid: 0000-0001-5175-357X
- first_name: Craig
full_name: Sims, Craig
last_name: Sims
- first_name: David
full_name: Treagust, David
last_name: Treagust
citation:
ama: 'Vernholz M, Sims C, Treagust D. From Time-Saving to Skill-Building: Reframing
Generative AI for Lesson-Planning—A Conceptual Design Paper. Education Sciences.
2026;16(5):782. doi:https://doi.org/10.3390/educsci16050782'
apa: 'Vernholz, M., Sims, C., & Treagust, D. (2026). From Time-Saving to Skill-Building:
Reframing Generative AI for Lesson-Planning—A Conceptual Design Paper. Education
Sciences, 16(5), 782. https://doi.org/10.3390/educsci16050782'
bibtex: '@article{Vernholz_Sims_Treagust_2026, title={From Time-Saving to Skill-Building:
Reframing Generative AI for Lesson-Planning—A Conceptual Design Paper}, volume={16},
DOI={https://doi.org/10.3390/educsci16050782},
number={5}, journal={Education Sciences}, author={Vernholz, Mats and Sims, Craig
and Treagust, David}, year={2026}, pages={782} }'
chicago: 'Vernholz, Mats, Craig Sims, and David Treagust. “From Time-Saving to Skill-Building:
Reframing Generative AI for Lesson-Planning—A Conceptual Design Paper.” Education
Sciences 16, no. 5 (2026): 782. https://doi.org/10.3390/educsci16050782.'
ieee: 'M. Vernholz, C. Sims, and D. Treagust, “From Time-Saving to Skill-Building:
Reframing Generative AI for Lesson-Planning—A Conceptual Design Paper,” Education
Sciences, vol. 16, no. 5, p. 782, 2026, doi: https://doi.org/10.3390/educsci16050782.'
mla: 'Vernholz, Mats, et al. “From Time-Saving to Skill-Building: Reframing Generative
AI for Lesson-Planning—A Conceptual Design Paper.” Education Sciences,
vol. 16, no. 5, 2026, p. 782, doi:https://doi.org/10.3390/educsci16050782.'
short: M. Vernholz, C. Sims, D. Treagust, Education Sciences 16 (2026) 782.
date_created: 2026-05-26T06:19:30Z
date_updated: 2026-05-26T06:22:45Z
ddc:
- '370'
department:
- _id: '300'
doi: https://doi.org/10.3390/educsci16050782
file:
- access_level: open_access
content_type: application/pdf
creator: maver001
date_created: 2026-05-26T06:19:27Z
date_updated: 2026-05-26T06:19:27Z
file_id: '65683'
file_name: education-16-00782-v2 (1).pdf
file_size: 2015567
relation: main_file
file_date_updated: 2026-05-26T06:19:27Z
has_accepted_license: '1'
intvolume: ' 16'
issue: '5'
language:
- iso: eng
oa: '1'
page: '782'
publication: Education Sciences
status: public
title: 'From Time-Saving to Skill-Building: Reframing Generative AI for Lesson-Planning—A
Conceptual Design Paper'
type: journal_article
user_id: '76955'
volume: 16
year: '2026'
...
---
_id: '65730'
abstract:
- lang: eng
text: "Abstract\r\n Is explainable
AI feasible and desirable, and are explanations of AI decisions always good? Many
answer this question in the affirmative, but there is a growing discourse that
is suspicious of the promises of explainable AI used to explain decisions towards
users, considering it unfeasible, undesirable, and even potentially misleading.
Could explainable AI be just a rhetorical foil? This paper proposes that, yes,
explainable AI is a rhetorical technology but no, this does not necessarily make
it undesirable. It starts by revisiting this debate according to the initial charge
against rhetorics by Plato and Aristotle’s response, considering rhetoric pharmacologically,
as not only a poison but also a cure for political life. It argues that, just
as rhetoric was necessary to take care of the temporalities of public life, in
court, the public event, and the assembly, so may explainable AI contribute to
a rhetorical context. Yet, whether it does so is conditioned on the extent to
which it cultivates the civic virtues relative to a respective context. The paper
considers the examples of predictive policing, credit scoring, and prediction
markets to argue about ideal states – civic virtues that may be cultivated in
each appropriate context – and deviations that point at the risks of explainable
AI to lead to domination, conformism, and political recalcitrance."
article_type: original
author:
- first_name: Wessel
full_name: Reijers, Wessel
last_name: Reijers
citation:
ama: 'Reijers W. Explainable AI as a Rhetorical Technology: Promoting Civic Virtue
in the Age of AI. Topoi. Published online 2026. doi:10.1007/s11245-026-10451-0'
apa: 'Reijers, W. (2026). Explainable AI as a Rhetorical Technology: Promoting Civic
Virtue in the Age of AI. Topoi. https://doi.org/10.1007/s11245-026-10451-0'
bibtex: '@article{Reijers_2026, title={Explainable AI as a Rhetorical Technology:
Promoting Civic Virtue in the Age of AI}, DOI={10.1007/s11245-026-10451-0},
journal={Topoi}, publisher={Springer Science and Business Media LLC}, author={Reijers,
Wessel}, year={2026} }'
chicago: 'Reijers, Wessel. “Explainable AI as a Rhetorical Technology: Promoting
Civic Virtue in the Age of AI.” Topoi, 2026. https://doi.org/10.1007/s11245-026-10451-0.'
ieee: 'W. Reijers, “Explainable AI as a Rhetorical Technology: Promoting Civic Virtue
in the Age of AI,” Topoi, 2026, doi: 10.1007/s11245-026-10451-0.'
mla: 'Reijers, Wessel. “Explainable AI as a Rhetorical Technology: Promoting Civic
Virtue in the Age of AI.” Topoi, Springer Science and Business Media LLC,
2026, doi:10.1007/s11245-026-10451-0.'
short: W. Reijers, Topoi (2026).
date_created: 2026-05-29T12:04:50Z
date_updated: 2026-05-29T12:07:55Z
ddc:
- '140'
doi: 10.1007/s11245-026-10451-0
file:
- access_level: closed
content_type: application/pdf
creator: wreijers
date_created: 2026-05-29T12:06:10Z
date_updated: 2026-05-29T12:06:10Z
file_id: '65731'
file_name: 2026_Reijers_XAI as a Rhetorical Technology.pdf
file_size: 844081
relation: main_file
success: 1
file_date_updated: 2026-05-29T12:06:10Z
has_accepted_license: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://link.springer.com/article/10.1007/s11245-026-10451-0
oa: '1'
project:
- _id: '2718'
name: TRR 318-2 - Constructing Explainability
publication: Topoi
publication_identifier:
issn:
- 0167-7411
- 1572-8749
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: 'Explainable AI as a Rhetorical Technology: Promoting Civic Virtue in the Age
of AI'
type: journal_article
user_id: '102524'
year: '2026'
...
---
_id: '65737'
abstract:
- lang: eng
text: 'We examine German individuals'' preferences for income and wealth taxation
and, importantly, the interplay between these two tax instruments. While prior
research often examines wealth tax preferences in isolation, actual tax systems
consist of multiple interacting taxes. To capture this dynamic, we elicit preferred
tax burdens in a large-scale online experiment with 2,702 participants randomly
assigned to one of four treatment groups: respondents state either an unspecified
overall tax burden, separate income and wealth tax burdens, an income tax burden
only, or a wealth tax burden only. Our baseline estimates reveal average (marginal)
tax rates of approximately 17.4% (18.9%) for income and 4.1% (2.3%) for wealth.
We find that participants associate wealth with an ability-to-pay taxes: when
a wealth tax is not explicitly available, preferred income tax rates are approximately
30% higher. However, when both instruments are available, participants do not
treat them as substitutes. Instead, they appear to treat the two taxes as separate
mental bins: the standalone income and wealth tax burdens are combined in a notably
additive manner, resulting in a significantly higher overall tax burden. Further,
respondents apply implicit exemptions for low levels of wealth and favor a wealth
tax base focused primarily on financial assets and real estate other than the
primary residence.'
author:
- first_name: Ralf
full_name: Maiterth, Ralf
last_name: Maiterth
- first_name: Yuri
full_name: Piper, Yuri
id: '49955'
last_name: Piper
- first_name: Cornelius
full_name: Schneider, Cornelius
last_name: Schneider
citation:
ama: Maiterth R, Piper Y, Schneider C. Preferences for Taxing Wealth and Income.;
2026. doi:10.2139/ssrn.6832418
apa: Maiterth, R., Piper, Y., & Schneider, C. (2026). Preferences for Taxing
Wealth and Income. https://doi.org/10.2139/ssrn.6832418
bibtex: '@book{Maiterth_Piper_Schneider_2026, series={TRR 266 Accounting for Transparency
Working Paper Series No. 239}, title={Preferences for Taxing Wealth and Income},
DOI={10.2139/ssrn.6832418},
author={Maiterth, Ralf and Piper, Yuri and Schneider, Cornelius}, year={2026},
collection={TRR 266 Accounting for Transparency Working Paper Series No. 239}
}'
chicago: Maiterth, Ralf, Yuri Piper, and Cornelius Schneider. Preferences for
Taxing Wealth and Income. TRR 266 Accounting for Transparency Working Paper
Series No. 239, 2026. https://doi.org/10.2139/ssrn.6832418.
ieee: R. Maiterth, Y. Piper, and C. Schneider, Preferences for Taxing Wealth
and Income. 2026.
mla: Maiterth, Ralf, et al. Preferences for Taxing Wealth and Income. 2026,
doi:10.2139/ssrn.6832418.
short: R. Maiterth, Y. Piper, C. Schneider, Preferences for Taxing Wealth and Income,
2026.
date_created: 2026-06-01T06:46:10Z
date_updated: 2026-06-01T06:47:26Z
department:
- _id: '187'
doi: 10.2139/ssrn.6832418
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
series_title: TRR 266 Accounting for Transparency Working Paper Series No. 239
status: public
title: Preferences for Taxing Wealth and Income
type: working_paper
user_id: '96670'
year: '2026'
...
---
_id: '65757'
abstract:
- lang: eng
text: Electrifying the heating sector is essential for achieving global climate
targets like the Paris Agreement’s 1.5 °C goal. In Germany, where 80 % of household
energy goes to space heating and hot water, shifting to low-carbon solutions is
crucial. Fossil-fuelled district heating networks can incorporate renewable energy
via heat pumps, improving efficiency. Although heat pump design typically favours
minimal temperature lifts, higher lifts can be economically viable with low electricity
prices and abundant renewables. Adding thermal energy storage boosts operational
flexibility. This study explores a flexible heat pump operation incorporating
part load behaviour with a thermal energy storage in a German city’s district
heating system to minimise costs and carbon dioxide emissions. Using a mixed-integer
linear programming model, it examines the impact of temperature adjustments and
storage on system efficiency. The results show that the integration of a heat
pump in a district heating system reduces operating costs. Compared to a supply
without a heat pump, with levelised cost of heating of 9.98 cent/kWhth and a fixed
operating mode with costs between 9.96 cent/kWhth and 11.49 cent/kWhth, the flexible
use results in lowest costs of 9.85 cent/kWhth, while also reducing overall CO2
emissions. Using a full factorial sensitivity analysis, the levelised cost of
heating ranged between 9.15 cent/kWhth in the best case and 10.37 cent/kWhth in
the worst case for the selected configuration.
article_number: '121714'
article_type: original
author:
- first_name: Henning Christoph
full_name: Rahlf, Henning Christoph
id: '56955'
last_name: Rahlf
orcid: 0009-0006-8106-2132
- first_name: Denis
full_name: Divkovic, Denis
id: '89059'
last_name: Divkovic
- first_name: Lukas
full_name: Knorr, Lukas
id: '90391'
last_name: Knorr
orcid: 0009-0005-4727-7511
- first_name: Florian
full_name: Schlosser, Florian
id: '88614'
last_name: Schlosser
- first_name: Henning
full_name: Meschede, Henning
id: '86954'
last_name: Meschede
orcid: 0000-0002-1538-089X
citation:
ama: Rahlf HC, Divkovic D, Knorr L, Schlosser F, Meschede H. Flexible operation
strategies for heat pumps in district heating systems using dynamic electricity
prices. Energy Conversion and Management. 2026;364. doi:10.1016/j.enconman.2026.121714
apa: Rahlf, H. C., Divkovic, D., Knorr, L., Schlosser, F., & Meschede, H. (2026).
Flexible operation strategies for heat pumps in district heating systems using
dynamic electricity prices. Energy Conversion and Management, 364,
Article 121714. https://doi.org/10.1016/j.enconman.2026.121714
bibtex: '@article{Rahlf_Divkovic_Knorr_Schlosser_Meschede_2026, title={Flexible
operation strategies for heat pumps in district heating systems using dynamic
electricity prices}, volume={364}, DOI={10.1016/j.enconman.2026.121714},
number={121714}, journal={Energy Conversion and Management}, publisher={Elsevier
BV}, author={Rahlf, Henning Christoph and Divkovic, Denis and Knorr, Lukas and
Schlosser, Florian and Meschede, Henning}, year={2026} }'
chicago: Rahlf, Henning Christoph, Denis Divkovic, Lukas Knorr, Florian Schlosser,
and Henning Meschede. “Flexible Operation Strategies for Heat Pumps in District
Heating Systems Using Dynamic Electricity Prices.” Energy Conversion and Management
364 (2026). https://doi.org/10.1016/j.enconman.2026.121714.
ieee: 'H. C. Rahlf, D. Divkovic, L. Knorr, F. Schlosser, and H. Meschede, “Flexible
operation strategies for heat pumps in district heating systems using dynamic
electricity prices,” Energy Conversion and Management, vol. 364, Art. no.
121714, 2026, doi: 10.1016/j.enconman.2026.121714.'
mla: Rahlf, Henning Christoph, et al. “Flexible Operation Strategies for Heat Pumps
in District Heating Systems Using Dynamic Electricity Prices.” Energy Conversion
and Management, vol. 364, 121714, Elsevier BV, 2026, doi:10.1016/j.enconman.2026.121714.
short: H.C. Rahlf, D. Divkovic, L. Knorr, F. Schlosser, H. Meschede, Energy Conversion
and Management 364 (2026).
date_created: 2026-06-03T06:34:27Z
date_updated: 2026-06-03T06:44:31Z
department:
- _id: '644'
- _id: '534'
doi: 10.1016/j.enconman.2026.121714
intvolume: ' 364'
keyword:
- Heat transition
- Optimisation
- Temperature flexibility
- Decarbonisation
- Multi energy
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/S0196890426006837
oa: '1'
project:
- _id: '1495'
name: FlexLabQuartier
publication: Energy Conversion and Management
publication_identifier:
issn:
- 0196-8904
publication_status: published
publisher: Elsevier BV
status: public
title: Flexible operation strategies for heat pumps in district heating systems using
dynamic electricity prices
type: journal_article
user_id: '56955'
volume: 364
year: '2026'
...
---
_id: '63838'
abstract:
- lang: eng
text: "Industrial electrification is increasing to reduce fossil fuel dependence,
alongside a growing share of volatile renewables.\r\nA secure and reliable energy
supply is crucial for industry, leading to a shift from centralised to decentralised
grid structures.\r\nDC microgrids becoming increasingly popular in industry, since
they enable energy recuperation from braking, reduce components and cables, and
integrate storage and local generation to manage supply interruptions or peak
loads.\r\nEVs add further synergies by serving as mobile storage units, helping
to store and redistribute locally generated renewable energy.\r\nThis paper analyses
how EV integration in droop-controlled DC grids can contribute to a more stable,
low-emission and peak-reduced load profile to the supply grid through load shifting
and bridge interruptions.\r\nA droop-controlled DC grid model has been developed,
incorporating an EV charging park based on probability functions.\r\nScalable
scenarios allow for diverse condition analysis using an energy management system
that utilises fuzzy logic and sequential MILP optimisation.\r\nIt has been shown
that a 7% improvement of coefficient represented grid-serving behaviour is possible
by load shifting.\r\nIt has also been demonstrated that an optimised EMS can reduce
the demand-based CO2 emissions by 41kg for a representative day compared to a
fuzzy logic EMS.\r\nAt the same time peak load is decreased yielding a more constant
residual load.\r\nThese results highlight the potential of a controlled bidirectional
charging infrastructure in DC grids and underscore the need to explicitly consider
charging processes to ensure a residual load as constant as possible."
article_number: '100227'
article_type: original
author:
- first_name: Henning Christoph
full_name: Rahlf, Henning Christoph
id: '56955'
last_name: Rahlf
orcid: 0009-0006-8106-2132
- first_name: Lukas
full_name: Knorr, Lukas
id: '90391'
last_name: Knorr
orcid: 0009-0005-4727-7511
- first_name: Simon
full_name: Althoff, Simon
last_name: Althoff
- first_name: Henning
full_name: Meschede, Henning
id: '86954'
last_name: Meschede
orcid: 0000-0002-1538-089X
citation:
ama: Rahlf HC, Knorr L, Althoff S, Meschede H. Analysis of bidirectional EV charging
infrastructures within industrial DC grids. Smart Energy. Published online
2026. doi:10.1016/j.segy.2026.100227
apa: Rahlf, H. C., Knorr, L., Althoff, S., & Meschede, H. (2026). Analysis of
bidirectional EV charging infrastructures within industrial DC grids. Smart
Energy, Article 100227. https://doi.org/10.1016/j.segy.2026.100227
bibtex: '@article{Rahlf_Knorr_Althoff_Meschede_2026, title={Analysis of bidirectional
EV charging infrastructures within industrial DC grids}, DOI={10.1016/j.segy.2026.100227},
number={100227}, journal={Smart Energy}, publisher={Elsevier BV}, author={Rahlf,
Henning Christoph and Knorr, Lukas and Althoff, Simon and Meschede, Henning},
year={2026} }'
chicago: Rahlf, Henning Christoph, Lukas Knorr, Simon Althoff, and Henning Meschede.
“Analysis of Bidirectional EV Charging Infrastructures within Industrial DC Grids.”
Smart Energy, 2026. https://doi.org/10.1016/j.segy.2026.100227.
ieee: 'H. C. Rahlf, L. Knorr, S. Althoff, and H. Meschede, “Analysis of bidirectional
EV charging infrastructures within industrial DC grids,” Smart Energy,
Art. no. 100227, 2026, doi: 10.1016/j.segy.2026.100227.'
mla: Rahlf, Henning Christoph, et al. “Analysis of Bidirectional EV Charging Infrastructures
within Industrial DC Grids.” Smart Energy, 100227, Elsevier BV, 2026, doi:10.1016/j.segy.2026.100227.
short: H.C. Rahlf, L. Knorr, S. Althoff, H. Meschede, Smart Energy (2026).
date_created: 2026-02-02T14:45:17Z
date_updated: 2026-06-03T06:42:54Z
department:
- _id: '644'
doi: 10.1016/j.segy.2026.100227
keyword:
- DC-grid
- Droop control
- Grid-serving behaviour
- Grid stability
- Bidirectional charging
- Sequential decision
- MILP optimisation
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/S266695522600002X
oa: '1'
publication: Smart Energy
publication_identifier:
issn:
- 2666-9552
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Analysis of bidirectional EV charging infrastructures within industrial DC
grids
type: journal_article
user_id: '56955'
year: '2026'
...
---
_id: '65585'
abstract:
- lang: eng
text: This article explores the relativity of Islamic normativity through the taṣwīb
doctrine (kullu mujtahid muṣīb) as formulated by al-ʿAnbarī and received by al-Jāḥiẓ
(d. 255/869), al-Jaṣṣāṣ (d. 370/981), and al-Baṣrī (d. 436/1044). Al-Jaṣṣāṣ reinterprets
the thesis through the ḥanafī principle of ashbah bi-l-aṣl as a hermeneutical-methodological
approach; al-Baṣrī elaborates it into an epistemo-logical model of normative plurality,
while al-Jāḥiẓ articulates a soteriological theory of moral responsibility in
the context of kalām. The analysis shows that classical Islamic legal theory developed
a distinct modelof normativity that maintains binding force under conditions of
pluralism and uncertainty. The article calls for renewed engagement with this
tradition in contemporary debates on religious normativity and legal pluralism.
article_type: original
author:
- first_name: Mohammed
full_name: Abdelrahem, Mohammed
id: '95179'
last_name: Abdelrahem
orcid: 0000-0002-0545-9799
citation:
ama: 'Abdelrahem M. Zur Relativität islamischer Normativität: Diskurslinien der
taṣwīb-Lehre von al-Ǧāḥiẓ (gest. 869) zu al-Ǧaṣṣāṣ (gest. 981) und al-Baṣrī (gest.
1044) . Forum Islamic-Theological Studies. 2026;Vol. 5 (2026)(1):94-111.
doi:10.71573/2941-122X_2026_5-1_154'
apa: 'Abdelrahem, M. (2026). Zur Relativität islamischer Normativität: Diskurslinien
der taṣwīb-Lehre von al-Ǧāḥiẓ (gest. 869) zu al-Ǧaṣṣāṣ (gest. 981) und al-Baṣrī
(gest. 1044) . Forum Islamic-Theological Studies, Vol. 5 (2026)(1),
94–111. https://doi.org/10.71573/2941-122X_2026_5-1_154'
bibtex: '@article{Abdelrahem_2026, title={Zur Relativität islamischer Normativität:
Diskurslinien der taṣwīb-Lehre von al-Ǧāḥiẓ (gest. 869) zu al-Ǧaṣṣāṣ (gest. 981)
und al-Baṣrī (gest. 1044) }, volume={Vol. 5 (2026)}, DOI={10.71573/2941-122X_2026_5-1_154},
number={1}, journal={Forum Islamic-Theological Studies}, publisher={LibreCat University},
author={Abdelrahem, Mohammed}, year={2026}, pages={94–111} }'
chicago: 'Abdelrahem, Mohammed. “Zur Relativität islamischer Normativität: Diskurslinien
der taṣwīb-Lehre von al-Ǧāḥiẓ (gest. 869) zu al-Ǧaṣṣāṣ (gest. 981) und al-Baṣrī
(gest. 1044) .” Forum Islamic-Theological Studies Vol. 5 (2026), no. 1
(2026): 94–111. https://doi.org/10.71573/2941-122X_2026_5-1_154.'
ieee: 'M. Abdelrahem, “Zur Relativität islamischer Normativität: Diskurslinien der
taṣwīb-Lehre von al-Ǧāḥiẓ (gest. 869) zu al-Ǧaṣṣāṣ (gest. 981) und al-Baṣrī (gest.
1044) ,” Forum Islamic-Theological Studies, vol. Vol. 5 (2026), no. 1,
pp. 94–111, 2026, doi: 10.71573/2941-122X_2026_5-1_154.'
mla: 'Abdelrahem, Mohammed. “Zur Relativität islamischer Normativität: Diskurslinien
der taṣwīb-Lehre von al-Ǧāḥiẓ (gest. 869) zu al-Ǧaṣṣāṣ (gest. 981) und al-Baṣrī
(gest. 1044) .” Forum Islamic-Theological Studies, vol. Vol. 5 (2026),
no. 1, LibreCat University, 2026, pp. 94–111, doi:10.71573/2941-122X_2026_5-1_154.'
short: M. Abdelrahem, Forum Islamic-Theological Studies Vol. 5 (2026) (2026) 94–111.
date_created: 2026-05-08T11:39:27Z
date_updated: 2026-06-08T14:26:44Z
ddc:
- '200'
department:
- _id: '469'
doi: 10.71573/2941-122X_2026_5-1_154
file:
- access_level: closed
content_type: application/pdf
creator: abdelrah
date_created: 2026-05-22T10:44:11Z
date_updated: 2026-05-22T10:44:11Z
file_id: '65677'
file_name: Relativität der Normativität_Abdelrahem_FORUM_2026.pdf
file_size: 1140343
relation: main_file
success: 1
file_date_updated: 2026-05-22T10:44:11Z
has_accepted_license: '1'
issue: '1'
keyword:
- IslamicTheology
- Usul al-Fiqh
- taswib
- islamische Rechtsphilosophie
- LegalTheory
- Pluralism
- OpenAccess
language:
- iso: ger
main_file_link:
- open_access: '1'
url: https://forum-journal.eu/forum/en/article/view/154
oa: '1'
page: 94-111
publication: Forum Islamic-Theological Studies
publication_identifier:
issn:
- 2941-122X
publication_status: published
publisher: LibreCat University
quality_controlled: '1'
status: public
title: 'Zur Relativität islamischer Normativität: Diskurslinien der taṣwīb-Lehre von
al-Ǧāḥiẓ (gest. 869) zu al-Ǧaṣṣāṣ (gest. 981) und al-Baṣrī (gest. 1044) '
type: journal_article
user_id: '95179'
volume: Vol. 5 (2026)
year: '2026'
...
---
_id: '65785'
abstract:
- lang: eng
text: Simulation-based design of high-power ultrasonic systems depends on the accurate
modelling of the electromechanical behaviour of piezoceramic materials. In practical
transducer applications, the relevant operating points are influenced by mechanical
preload and heating, both of which give rise to changes in the elastic, dielectric,
and piezoelectric material properties. Material parameters identified under idealised,
unloaded conditions are therefore insufficient to represent piezoceramic material
behaviour under realistic operating conditions. To overcome this limitation, experimental
setups are developed that enable the measurement of electrical impedance spectra
under controlled thermal and mechanical conditions. The acquired impedance data
are used in an inverse identification procedure, in which the behaviour of a finite
element forward model is iteratively fitted to the measurements using a block
coordinate descent optimisation strategy guided by a sensitivity analysis. This
yields effective linear material parameters as a function of temperature and mechanical
stress at varying operating points. The identified temperature-dependent parameters,
for instance, can be employed in a coupled thermo-electromechanical simulation
framework to predict the temperature-dependent material behaviour during operation.
The linear identification based on varying operation points provides an initial
approximation of the nonlinear material response, establishing a basis for the
development of corresponding nonlinear material models.
author:
- first_name: Olga
full_name: Friesen, Olga
id: '44026'
last_name: Friesen
orcid: 0009-0007-5598-9484
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Jonas
full_name: Hölscher, Jonas
id: '73952'
last_name: Hölscher
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
- 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: Raphael
full_name: Kuess, Raphael
last_name: Kuess
- first_name: Andrea
full_name: Walther, Andrea
last_name: Walther
- first_name: Carsten
full_name: Spieker, Carsten
id: '67587'
last_name: Spieker
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Friesen O, Claes L, Hölscher J, et al. Measurement of multiphysical material
parameters of piezoceramic components for high-power ultrasonic applications.
tm - Technisches Messen. Published online 2026. doi:10.1515/teme-2026-0042
apa: Friesen, O., Claes, L., Hölscher, J., Henning, B., Scheidemann, C., Hemsel,
T., Kuess, R., Walther, A., Spieker, C., & Förstner, J. (2026). Measurement
of multiphysical material parameters of piezoceramic components for high-power
ultrasonic applications. Tm - Technisches Messen. https://doi.org/10.1515/teme-2026-0042
bibtex: '@article{Friesen_Claes_Hölscher_Henning_Scheidemann_Hemsel_Kuess_Walther_Spieker_Förstner_2026,
title={Measurement of multiphysical material parameters of piezoceramic components
for high-power ultrasonic applications}, DOI={10.1515/teme-2026-0042},
journal={tm - Technisches Messen}, publisher={Walter de Gruyter GmbH}, author={Friesen,
Olga and Claes, Leander and Hölscher, Jonas and Henning, Bernd and Scheidemann,
Claus and Hemsel, Tobias and Kuess, Raphael and Walther, Andrea and Spieker, Carsten
and Förstner, Jens}, year={2026} }'
chicago: Friesen, Olga, Leander Claes, Jonas Hölscher, Bernd Henning, Claus Scheidemann,
Tobias Hemsel, Raphael Kuess, Andrea Walther, Carsten Spieker, and Jens Förstner.
“Measurement of Multiphysical Material Parameters of Piezoceramic Components for High-Power
Ultrasonic Applications.” Tm - Technisches Messen, 2026. https://doi.org/10.1515/teme-2026-0042.
ieee: 'O. Friesen et al., “Measurement of multiphysical material parameters
of piezoceramic components for high-power ultrasonic applications,” tm - Technisches
Messen, 2026, doi: 10.1515/teme-2026-0042.'
mla: Friesen, Olga, et al. “Measurement of Multiphysical Material Parameters of Piezoceramic
Components for High-Power Ultrasonic Applications.” Tm - Technisches Messen,
Walter de Gruyter GmbH, 2026, doi:10.1515/teme-2026-0042.
short: O. Friesen, L. Claes, J. Hölscher, B. Henning, C. Scheidemann, T. Hemsel,
R. Kuess, A. Walther, C. Spieker, J. Förstner, Tm - Technisches Messen (2026).
date_created: 2026-06-08T05:44:09Z
date_updated: 2026-06-08T17:54:45Z
department:
- _id: '49'
doi: 10.1515/teme-2026-0042
keyword:
- tet_topic_piezo
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
publication: tm - Technisches Messen
publication_identifier:
issn:
- 0171-8096
- 2196-7113
publication_status: published
publisher: Walter de Gruyter GmbH
status: public
title: Measurement of multiphysical material parameters of piezoceramic components
for high-power ultrasonic applications
type: journal_article
user_id: '158'
year: '2026'
...