@book{59701,
  editor       = {{Spener, Anna Maria}},
  pages        = {{305}},
  publisher    = {{Universitätsbibliothek 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}},
  year         = {{2026}},
}

@unpublished{64810,
  abstract     = {{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       = {{Winkelmann, David and Elbracht, Theresa and Brenker, Jonas Maximilian and Gerzen, Arnold}},
  booktitle    = {{arXiv:2602.04464}},
  publisher    = {{arXiv}},
  title        = {{{Discounted Sales of Expiring Perishables: Challenges for Demand Forecasting in Grocery Retail Practice}}},
  year         = {{2026}},
}

@article{64863,
  abstract     = {{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.</jats:p>}},
  author       = {{Hansmeier, Philipp and Schäfer, Jannika Marie and zur Heiden, Philipp}},
  issn         = {{1019-6781}},
  journal      = {{Electronic Markets}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Artificial intelligence in digital service ecosystems—Towards a taxonomy and archetypes}}},
  doi          = {{10.1007/s12525-026-00879-y}},
  volume       = {{36}},
  year         = {{2026}},
}

@article{65596,
  author       = {{Hansmeier, Philipp and zur Heiden, Philipp}},
  issn         = {{0144-929X}},
  journal      = {{Behaviour & Information Technology}},
  pages        = {{1--30}},
  publisher    = {{Informa UK Limited}},
  title        = {{{Towards a Service Ecosystem Perspective on Customer Experience: Insights from Hybrid (Online-Offline) Customer Journeys}}},
  doi          = {{10.1080/0144929x.2026.2666280}},
  year         = {{2026}},
}

@inbook{65521,
  abstract     = {{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       = {{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 Scheytt, J. Christoph}},
  booktitle    = {{Electronic-Photonic Integrated Systems for Ultrafast Signal Processing}},
  editor       = {{Scheytt, J. Christoph and Kress, Christian and Berroth, Manfred and Pachnicke, Stephan and Witzens, Jeremy}},
  isbn         = {{9783032083395}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Ultra-Broadband Photonically Assisted Analog-to-Digital-Converters}}},
  doi          = {{10.1007/978-3-032-08340-1_3}},
  year         = {{2026}},
}

@inbook{65600,
  abstract     = {{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       = {{De, Souvaraj and Mandalawi, Younus and Das, Ranjan and Weizel, Maxim}},
  booktitle    = {{Metrology for THz Communications}},
  isbn         = {{9783032019851}},
  issn         = {{0342-4111}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Integrated Photonic-Assisted Signal Processing and Thermal Crosstalk}}},
  doi          = {{10.1007/978-3-032-01986-8_20}},
  year         = {{2026}},
}

@inbook{65601,
  abstract     = {{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       = {{Weizel, Maxim and Bahmanian, Meysam and Scheytt, J. Christoph}},
  booktitle    = {{Metrology for THz Communications}},
  isbn         = {{9783032019851}},
  issn         = {{0342-4111}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Integrated Photonically Assisted Samplers}}},
  doi          = {{10.1007/978-3-032-01986-8_29}},
  year         = {{2026}},
}

@inbook{65602,
  abstract     = {{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       = {{Wrana, Dominik and Weizel, Maxim and Haussmann, Simon and Bahmanian, Meysam and Kallfass, Ingmar and Scheytt, J. Christoph}},
  booktitle    = {{Metrology for THz Communications}},
  isbn         = {{9783032019851}},
  issn         = {{0342-4111}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Simulation and Modelling of Electronic and Photonic Components}}},
  doi          = {{10.1007/978-3-032-01986-8_36}},
  year         = {{2026}},
}

@article{65153,
  author       = {{Butzhammer, Lorenz}},
  issn         = {{0141-6359}},
  journal      = {{Precision Engineering}},
  pages        = {{377--400}},
  publisher    = {{Elsevier BV}},
  title        = {{{Conversion between detector- and rotary-table-related misalignment parameterisations for unified projection-matrix-based geometry calibration in dimensional X-ray computed tomography}}},
  doi          = {{10.1016/j.precisioneng.2026.03.015}},
  volume       = {{100}},
  year         = {{2026}},
}

@article{61441,
  abstract     = {{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.</jats:p>
          <jats:p>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.}},
  author       = {{Homt, Martina and Bloh, Bea and Wehde, Janis}},
  issn         = {{2190-6890}},
  journal      = {{Zeitschrift für Bildungsforschung}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Perspektiven angehender Lehrkräfte auf Forschendes Lernen – eine qualitative Längsschnittstudie im Referendariat und Berufseinstieg}}},
  doi          = {{10.1007/s35834-025-00506-4}},
  year         = {{2026}},
}

@inproceedings{65606,
  abstract     = {{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       = {{Meise, Adrian Tobias and Cord-Landwehr, Tobias and Boeddeker, Christoph and Delcroix, Marc and Nakatani, Tomohiro and Haeb-Umbach, Reinhold}},
  booktitle    = {{ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}},
  keywords     = {{mixture models, meeting processing, diarization, source separation}},
  location     = {{Barcelona}},
  publisher    = {{IEEE}},
  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}},
  year         = {{2026}},
}

@article{65631,
  abstract     = {{<jats:title>Abstract</jats:title>
                  <jats:p>
                    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 (
                    <jats:italic>Gymnasium</jats:italic>
                    ,
                    <jats:italic>Gesamtschule</jats:italic>
                    ,
                    <jats:italic>Realschule</jats:italic>
                    ) 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.
                  </jats:p>}},
  author       = {{Stallmeister, Lea and Rezat, Sebastian}},
  issn         = {{0013-1954}},
  journal      = {{Educational Studies in Mathematics}},
  keywords     = {{mathematics, textbooks, userstudy, resources, digital resources, students, secondary eduction}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{The role of the mathematics textbook in times of resource diversity}}},
  doi          = {{10.1007/s10649-026-10511-7}},
  year         = {{2026}},
}

@article{65630,
  abstract     = {{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       = {{Stallmeister, Lea and Rezat, Sebastian}},
  journal      = {{Educational Studies in Mathematics}},
  publisher    = {{Springer}},
  title        = {{{The role of the mathematics textbook in times of resource diversity}}},
  doi          = {{10.1007/s10649-026-10511-7}},
  year         = {{2026}},
}

@article{65682,
  author       = {{Vernholz, Mats and Sims, Craig and Treagust, David}},
  journal      = {{Education Sciences}},
  number       = {{5}},
  pages        = {{782}},
  title        = {{{From Time-Saving to Skill-Building: Reframing Generative AI for Lesson-Planning—A Conceptual Design Paper}}},
  doi          = {{https://doi.org/10.3390/educsci16050782}},
  volume       = {{16}},
  year         = {{2026}},
}

@article{65730,
  abstract     = {{<jats:title>Abstract</jats:title>
                  <jats:p>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.</jats:p>}},
  author       = {{Reijers, Wessel}},
  issn         = {{0167-7411}},
  journal      = {{Topoi}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Explainable AI as a Rhetorical Technology: Promoting Civic Virtue in the Age of AI}}},
  doi          = {{10.1007/s11245-026-10451-0}},
  year         = {{2026}},
}

@techreport{65737,
  abstract     = {{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       = {{Maiterth, Ralf and Piper, Yuri and Schneider, Cornelius}},
  title        = {{{Preferences for Taxing Wealth and Income}}},
  doi          = {{10.2139/ssrn.6832418}},
  year         = {{2026}},
}

@article{65757,
  abstract     = {{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.}},
  author       = {{Rahlf, Henning Christoph and Divkovic, Denis and Knorr, Lukas and Schlosser, Florian and Meschede, Henning}},
  issn         = {{0196-8904}},
  journal      = {{Energy Conversion and Management}},
  keywords     = {{Heat transition, Optimisation, Temperature flexibility, Decarbonisation, Multi energy}},
  publisher    = {{Elsevier BV}},
  title        = {{{Flexible operation strategies for heat pumps in district heating systems using dynamic electricity prices}}},
  doi          = {{10.1016/j.enconman.2026.121714}},
  volume       = {{364}},
  year         = {{2026}},
}

@article{63838,
  abstract     = {{Industrial electrification is increasing to reduce fossil fuel dependence, alongside a growing share of volatile renewables.
A secure and reliable energy supply is crucial for industry, leading to a shift from centralised to decentralised grid structures.
DC 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.
EVs add further synergies by serving as mobile storage units, helping to store and redistribute locally generated renewable energy.
This 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.
A droop-controlled DC grid model has been developed, incorporating an EV charging park based on probability functions.
Scalable scenarios allow for diverse condition analysis using an energy management system that utilises fuzzy logic and sequential MILP optimisation.
It has been shown that a 7% improvement of coefficient represented grid-serving behaviour is possible by load shifting.
It 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.
At the same time peak load is decreased yielding a more constant residual load.
These 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.}},
  author       = {{Rahlf, Henning Christoph and Knorr, Lukas and Althoff, Simon and Meschede, Henning}},
  issn         = {{2666-9552}},
  journal      = {{Smart Energy}},
  keywords     = {{DC-grid, Droop control, Grid-serving behaviour, Grid stability, Bidirectional charging, Sequential decision, MILP optimisation}},
  publisher    = {{Elsevier BV}},
  title        = {{{Analysis of bidirectional EV charging infrastructures within industrial DC grids}}},
  doi          = {{10.1016/j.segy.2026.100227}},
  year         = {{2026}},
}

@article{65585,
  abstract     = {{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.}},
  author       = {{Abdelrahem, Mohammed}},
  issn         = {{2941-122X}},
  journal      = {{Forum Islamic-Theological Studies}},
  keywords     = {{IslamicTheology, Usul al-Fiqh, taswib, islamische Rechtsphilosophie, LegalTheory, Pluralism, OpenAccess}},
  number       = {{1}},
  pages        = {{94--111}},
  publisher    = {{LibreCat University}},
  title        = {{{Zur Relativität islamischer Normativität: Diskurslinien der taṣwīb-Lehre von al-Ǧāḥiẓ (gest. 869) zu al-Ǧaṣṣāṣ (gest. 981) und al-Baṣrī (gest. 1044) }}},
  doi          = {{10.71573/2941-122X_2026_5-1_154}},
  volume       = {{Vol. 5  (2026)}},
  year         = {{2026}},
}

@article{65785,
  abstract     = {{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       = {{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}},
  issn         = {{0171-8096}},
  journal      = {{tm - Technisches Messen}},
  keywords     = {{tet_topic_piezo}},
  publisher    = {{Walter de Gruyter GmbH}},
  title        = {{{Measurement of multiphysical material parameters of piezoceramic components for high-power ultrasonic applications}}},
  doi          = {{10.1515/teme-2026-0042}},
  year         = {{2026}},
}