| 1. |
- Alfes, Claudia, et al.
(författare)
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A classification of polyharmonic Maaß forms via quiver representations
- 2025
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Ingår i: Journal of Algebra. - 0021-8693 .- 1090-266X. ; 661, s. 713-756
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Tidskriftsartikel (refereegranskat)abstract
- We give a classification of the Harish-Chandra modules generated by the pullback to SL2(R) of polyharmonic Maaß forms for congruence subgroups of SL2(Z) with exponential growth allowed at the cusps. This extends results of Bringmann–Kudla in the harmonic case. While in the harmonic setting there are nine cases, our classification comprises ten; A new case arises in weights k>1. To obtain the classification we introduce quiver representations into the topic and show that those associated with polyharmonic Maaß forms are cyclic, indecomposable representations of the two-cyclic or the Gelfand quiver. A classification of these transfers to a classification of polyharmonic weak Maaß forms. To realize all possible cases of Harish-Chandra modules we develop a theory of weight shifts for Taylor coefficients of vector-valued spectral families. We provide a comprehensive computer implementation of this theory, which allows us to provide explicit examples.
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| 2. |
- Brijs, Jeroen, et al.
(författare)
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Effects of electrical and percussive stunning on neural, ventilatory and cardiac responses of rainbow trout
- 2025
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Ingår i: AQUACULTURE. - 0044-8486 .- 1873-5622. ; 594
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Tidskriftsartikel (refereegranskat)abstract
- From an ethical standpoint, it is imperative that rainbow trout (Oncorhynchus mykiss) are humanely slaughtered, which entails that they are rendered unconscious immediately by a stunning method and remain so until death. The efficacy of electrical stunning following dewatering (i.e., in-air electrical stunning at intensities of 50 to 920 mA and durations of 5 to 30 s) and percussive stunning, both advocated as humane stunning and/or killing methods, are evaluated here for this species via the presence or absence of visually evoked responses (VERs). In addition, ventilatory and cardiac responses were evaluated to elucidate the physiological basis for the lethality of both methods. While the present study was unable to determine the capability of in-air electrical stunning to induce immediate unconsciousness, our findings revealed that irreversible stuns were induced by both in-air electrical stunning (i.e., similar to 25 to 70% of individuals did not recover VERs across the various combinations of stunning intensities and/or durations) and percussive stunning (i.e., similar to 100% of individuals did not recover VERs). The efficacy of in-air electrical stunning for permanently abolishing VERs was marginally, but significantly, impacted by stun intensity (i.e., explained 8% of the variation). Furthermore, due to substantial inter-specific variability and a limited sample size, significant impacts of stun intensity and/or duration on the recovery of VERs in reversibly stunned individuals were not detected in the present study (i.e., VERs recovered between <0.5 to 28.8 min). Further investigation is therefore necessary before in-air electrical stunning can be endorsed as a standalone humane slaughter method for rainbow trout. This includes determining its capacity to induce immediate unconsciousness, as well as to identify additional factors that could be modified or enhanced to improve its efficacy. Furthermore, since death following in-air electrical stunning likely entails a prolonged process involving ventilatory failure, hypoxemia, and subsequent vital organ malfunction, rather than immediate cardiac arrest or central nervous system failure, the sequential use of methods such as percussive stunning is recommended to safeguard the welfare of rainbow trout during slaughter.
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| 3. |
- Gardella, Eusebio, et al.
(författare)
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Rings and C*-algebras generated by commutators ☆
- 2025
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Ingår i: JOURNAL OF ALGEBRA. - 0021-8693 .- 1090-266X. ; 662, s. 214-241
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Tidskriftsartikel (refereegranskat)abstract
- We show that a unital ring is generated by its commutators as an ideal if and only if there exists a natural number N such that every element is a sum of N products of pairs of commutators. We show that one can take N < 2 for matrix rings, and that one may choose N < 3 for rings that contain a direct sum of matrix rings - this in particular applies to C*-algebras that are properly infinite or have real rank zero. For Jiang-Su-stable C*-algebras, we show that N < 6 can be arranged. For arbitrary rings, we show that every element in the commutator ideal admits a power that is a sum of products of commutators. Using that a C*-algebra cannot be a radical extension over a proper ideal, we deduce that a C*-algebra is generated by its commutators as a not necessarily closed ideal if and only if every element is a finite sum of products of pairs of commutators. (c) 2024 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://
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| 4. |
- Haley, Aimee, 1985, et al.
(författare)
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The Purposes of Internationalisation – Future Teachers’ Perspectives
- 2025
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Ingår i: Journal of Education for Teaching. - 0260-7476 .- 1360-0540. ; 51:1
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Tidskriftsartikel (refereegranskat)abstract
- This research investigates the purposes of internationalisation from the perspective of a group of international prospective teachers studying at a Swedish university. The results show that the prospective teachers’ understanding of internationalisation corresponds to three ideologies of internationalisation – idealism, instrumentalism, and educationalism – but there is also evidence of a more complex and multifaceted understanding of internationalisation. We propose that a new internationalisation ideology may be emerging that corresponds to ideas about ‘responsible internationalisation’ and is connected to the Covid-19 pandemic and changing geopolitics. The importance of taking future teachers’ viewpoints into account, as well as a considering changes to global and local educational contexts, is emphasised when formulating internationalisation strategies in teacher education.
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| 5. |
- Havinger, Carl-Johan, et al.
(författare)
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My Digital Mountain - An Autoethnographic Exploration of Off-piste Skiers' Use of Digital Tools
- 2025
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Ingår i: Proceedings of the Annual Hawaii International Conference on System Sciences (HICSS). - 1530-1605 .- 2572-6862.
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Konferensbidrag (refereegranskat)abstract
- This paper explores the sociocultural dynamics of off-piste skiers' engagement with digital tools for information-seeking, sharing, and risk management. The study uses autoethnographic narratives and qualitative interview data to understand the digital interactions of off-piste skiers and their influence on decision-making and safety. The findings underscore the extensive use of digital tools, particularly FATMAP, to provide real-time information crucial for navigating the unpredictable terrain and enhancing decision-making processes. This research underscores the significant role of digital representation of the mountain in shaping off-piste skiing practices, cultivating community, and, ultimately, experiences. The findings provide unique insights that help us understand digital tools’ informational use in extreme environments, specifically in the context of off-piste skiing.
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| 6. |
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| 8. |
- Salo, Petri, et al.
(författare)
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Action Research for being - characteristics of a tradition of practice
- 2025
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Ingår i: Benedicto Kreisler, J. (Ed.). Scrutinising the Nordic Dimension in Education. Myths, realities, and integration efforts in Europe´s Nordic region. - : Routledge. - 9781032674537 ; , s. 81-97
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Bokkapitel (refereegranskat)abstract
- This chapter aims at identifying and describing the characteristics of educational action research as a tradition and practice, based mainly on its development in three Nordic countries, namely Sweden, Norway and Finland. The characterisation begins with a reflection on the development of Anglo-Saxon variants of action research within education, from 1950s onwards. Thereafter follows an embodiment of a democratic and participatory conceptualisation of action research, related to its formation within working life practices in Nordic countries. This conceptualisation is further traced back and interpreted in terms of bildning, collective pedagogical practices within folkbildning and in relation to pedagogik as a basis for teachers’ professional knowledge base. The characteristics of educational action research are encapsulated as action research for being.
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| 9. |
- Shang, Yueyong, et al.
(författare)
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Sex-specific trade-off under marine heat wave and food limitation: Insights from bioenergetic and intestinal microbiome in mussels
- 2025
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Ingår i: AQUACULTURE. - 0044-8486 .- 1873-5622. ; 594
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Tidskriftsartikel (refereegranskat)abstract
- Global warming, marine heat waves and subsequent food limitation are projected to be more frequent and intense under future climate change. Understanding the consequences for key marine species such as mussels is critical to ensure sustainability and guide adaptation options. Mussels are not only an economically important species but also considered excellent indicators of environmental changes. This study evaluates the sex-specific effects of marine heat waves and food limitation on the bioenergetics and intestinal flora of the digestive glands of mussels. Heat waves had a significant negative effect on cell energy homeostasis of the digestive gland in female mussels. Food limitation significantly decreased the total energy reserve in the digestive gland of both female and male mussels. Combined food limitation and heat wave led to sex-specific responses with significantly higher cellular energy allocation parameters observed in the digestive gland of female mussels as compared to males. Additionally, 16S rRNA sequencing showed that the intestinal flora of female mussels was more stable, as well as sex-specific differences in the relative abundance of various bacteria phyla. This study highlights the importance to consider sex in studies evaluating the impact of climate change in mussels, and the results can contribute to the development of strategies for sustainable bivalve aquaculture under the growing risks of warming, heatwaves and food limitations.
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