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See detailKommunikationsaspekte der Zukunft im Klassenraum
Andersen, Katja Natalie UL; Kihm, Pascal; Neuböck-Hubinger, Brigitte et al

in Gesellschaft für Didaktik des Sachunterrichts (Ed.) Jahresband GDSU 2022: Herausforderungen und Zukunftsperspektiven für den Sachunterricht (2023)

A future-oriented science education refers to everyday experiences, (technical) language and current developments in migration and multilingualism (Kahlert 2022). This requires a participatory bringing ... [more ▼]

A future-oriented science education refers to everyday experiences, (technical) language and current developments in migration and multilingualism (Kahlert 2022). This requires a participatory bringing together of all areas of knowledge and experience in the classroom (Stoltenberg 2004). The arti-cle discusses tasks in science teaching from different perspectives (semantics, multilingualism, etc.), using the topic “swimming and sinking”, which appears to be a suitable frame of reference for several reasons: (1) the topic is based on a wide range of research; (2) it refers to a precise content area with the phenomenon of buoyancy and the considerations on force, density, interaction; (3) it connects to the living environment, and (4) follows the discourse of everyday language vs. educational language. Based on these items, the article tackles the question of what impact language in science textbooks has on (multilingual) students’ acquisition of science content. [less ▲]

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See detailNatur a Literatur: Nei Erzielunge fir nei Welten
Thiltges, Sébastian UL

Article for general public (2022)

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See detailIntersectional Inequalities in Science
Kozlowski, Diego UL

Presentation (2022, November 16)

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See detailTrägt Unterrichtsqualität zur Prävention von Entfremdung vom Lernen bei? Empirische Befunde für die Sekundarstufe in der Schweiz und Luxemburg
Braas, Lena; Grecu, Alyssa; Morinaj, Julia et al

in Lauermann, Fani; Jöhren, Christiane; McElvany, Nele (Eds.) et al Jahrbuch der Schulentwicklung. Band 22: Multiperspektivität von Unterrichtsprozessen (2022)

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See detailCalcGraph: taming the high costs of deep learning using models
Lorentz, Joe UL; Hartmann, Thomas UL; Moawad, Assaad UL et al

in Software and Systems Modeling (2022)

Models based on differential programming, like deep neural networks, are well established in research and able to outperform manually coded counterparts in many applications. Today, there is a rising ... [more ▼]

Models based on differential programming, like deep neural networks, are well established in research and able to outperform manually coded counterparts in many applications. Today, there is a rising interest to introduce this flexible modeling to solve real-world problems. A major challenge when moving from research to application is the strict constraints on computational resources (memory and time). It is difficult to determine and contain the resource requirements of differential models, especially during the early training and hyperparameter exploration stages. In this article, we address this challenge by introducing CalcGraph, a model abstraction of differentiable programming layers. CalcGraph allows to model the computational resources that should be used and then CalcGraph’s model interpreter can automatically schedule the execution respecting the specifications made. We propose a novel way to efficiently switch models from storage to preallocated memory zones and vice versa to maximize the number of model executions given the available resources. We demonstrate the efficiency of our approach by showing that it consumes less resources than state-of-the-art frameworks like TensorFlow and PyTorch for single-model and multi-model execution. [less ▲]

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See detailForecasting of a complex microbial community using meta-omics
Delogu, Francesco UL; Kunath, Benoît UL; Queirós, P. M. et al

E-print/Working paper (2022)

Microbial communities are complex assemblages whose dynamics are shaped by abiotic and biotic factors. A major challenge concerns correctly forecasting the community behaviour in the future. In this ... [more ▼]

Microbial communities are complex assemblages whose dynamics are shaped by abiotic and biotic factors. A major challenge concerns correctly forecasting the community behaviour in the future. In this context, communities in biological wastewater treatment plants (BWWTPs) represent excellent model systems, because forecasting them is required to ultimately control and operate the plants in a sustainable manner. Here, we forecast the microbial community from the water-air interface of the anaerobic tank of a BWWTP via longitudinal meta-omics (metagenomics, metatranscriptomics and metaproteomics) data covering 14 months at weekly intervals. We extracted all the available time-dependent information, summarised it in 17 temporal signals (explaining 91.1 of the temporal variance) and linked them over time to rebuild the sequence of ecological phenomena behind the community dynamics. We forecasted the signals over the following five years and tested the predictions with 21 extra samples. We were able to correctly forecast five signals accounting for 22.5 of the time-dependent information in the system and generate mechanistic predictions on the ecological events in the community (e.g. a predation cycle involving bacteria, viruses and amoebas). Through the forecasting of the 17 signals and the environmental variables readings we reconstructed the gene abundance and expression for the following 5 years, showing a nearly perfect trend prediction (coefficient of determination >= 0.97) for the first 2 years. The study demonstrates the maturity of microbial ecology to forecast composition and gene expression of open microbial ecosystems using year-spanning interactions between community cycles and environmental parameters. [less ▲]

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See detailInfographic 2: Food System Discovers - Actors and Activities in Luxembourg
Reckinger, Rachel UL; Kapgen, Diane UL; Korjonen, Maria Helena UL et al

Computer development (2022)

This infographic forms part of a larger series of infographics produced by the Sustainable Food Practices team at the University of Luxembourg. The first infographic is titled ‘Food System Synopsis – The ... [more ▼]

This infographic forms part of a larger series of infographics produced by the Sustainable Food Practices team at the University of Luxembourg. The first infographic is titled ‘Food System Synopsis – The Foodscape in Luxembourg’ and is available on our website. The second and interactive infographic, titled ‘Food System Discovery – Actors and activities in Luxembourg’, derives from our first infographic and provides a deeper level of analysis, a description and definitions of all the actor groups and their activities in the food system. The interactive online version is available here. The purpose of the series of infographics produced by the Sustainable Food Practices team at the University of Luxembourg is to analyse the food system in Luxembourg in four steps – from mapping the existing foodscape in Luxembourg to elaborating pathways for the transition processes towards a more sustainable food system.  This 2nd Infographic ‘Food System Discovery – Actors and activities in Luxembourg’ (reference: IG2-v.A) allows a user to explore the previously published, first static Infographic (‘Food System Synopsis – The foodscape in Luxembourg’) in further depth using playful and interactive navigation tools. Our methodological approach to this infographic will be made available here soon. Our research resulted in the two overarching kinds of actors: those that deal directly ‘with’ food – operating at the level of the food supply circuit, and actors engaging in a varied array of activities revolving ‘around’ food – operating at the broader food system level. These two combined comprise the whole food system. The research then led to an ensuing distillation of these actors into: actor categories, actor groups, and actor types, with each level further specifying the activities taken by actors. The definitions of the actor categories, actor groups and actor types allows the infographic to be transposed to other contexts, while only the example actors from Luxembourg are context-specific to the country. For these reasons, the depicted food system is not only Luxembourg’s food system, but a more general view of food systems.  In the future we will build on the two first infographics to demonstrate interrelationships, pressure points, gaps and opportunities – and the outcome of this analysis will provide the basis for the research team to unfold pathways for potential optimisation of different leverage points within the system.  [less ▲]

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See detailHerausforderungen und Zukunftsperspektiven des Sachunterrichts im Fokus von Migration und Mehrsprachigkeit
Andersen, Katja Natalie UL; Peschel, Markus; Neuböck-Hubinger, Brigitte

Scientific Conference (2022, March 11)

Ein zukunftsfähiger Sachunterricht nimmt auf lebensweltliche Erfahrungen, (Fach)Sprache und aktuelle Entwicklungen zu Migration und Mehrsprachigkeit Bezug (Kahlert 2016). Dazu bedarf es einer ... [more ▼]

Ein zukunftsfähiger Sachunterricht nimmt auf lebensweltliche Erfahrungen, (Fach)Sprache und aktuelle Entwicklungen zu Migration und Mehrsprachigkeit Bezug (Kahlert 2016). Dazu bedarf es einer partizipativen Zusammenführung aller Wissens- und Erfahrungsbereiche im Klassenraum (vgl. Stoltenberg 2004). Das Symposium diskutiert Zukunftsperspektiven für die Entwicklung und Umsetzung von Aufgabenstellungen im Sachunterricht, dargestellt anhand des Themenkomplexes „Schwimmen und Sinken“. Aus unterschiedlichen Blickwinkeln wird der Frage nachgegangen, wie zukünftig Aufgaben gestaltet sein müssen, um eine sprachlich heterogener werdende Schülerschaft in der aktiven Auseinandersetzung mit der Sache zu unterstützen. Ausgehend von einer Klärung der fach-sprachlichen Begrifflichkeiten und der fachlichen Anschlussfähigkeit von Phänomenen und Konzepten zum Thema werden Ergebnisse erster explorativer Untersuchungen entsprechender Aufgaben vorgestellt und aus fachlicher und sprachlicher Sicht diskutiert. Auf der Planungsebene wird die Text-Bild-Kommunikation in Schulbuchaufgaben als Ausgangspunkt gewählt, um den Prozess der didaktischen Rekonstruktion von Aufgaben zu erörtern. Auf der Umsetzungsebene wird sich mit dem Problem mangelnder fachinhaltlicher und -methodischer Kompetenzen der Lehrkräfte auseinandergesetzt, um Forderungen für die Qualifizierung zu formulieren – auch im Hinblick auf die wachsende Mehrsprachigkeit der Schüler*innen. Ziel des Symposiums ist es, zukünftige Entwicklungsfelder mit Blick auf Aufgaben und Lehrer*innenbildung – am Beispiel des Themas „Schwimmen und Sinken“ – aufzuzeigen und vor dem Hintergrund aktueller Entwicklungen zu diskutieren. [less ▲]

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See detailA Magnetohydrodynamic enhanced entry system for space transportation: MEESST
Lani, Andrea; Sharma, Vatsalya; Giangaspero, Vincent F. et al

in Journal of Space Safety Engineering (2022)

This paper outlines the initial development of a novel magnetohydrodynamic (MHD) plasma control system which aims at mitigating shock-induced heating and the radio-frequency communication blackout ... [more ▼]

This paper outlines the initial development of a novel magnetohydrodynamic (MHD) plasma control system which aims at mitigating shock-induced heating and the radio-frequency communication blackout typically encountered during (re-)entry into planetary atmospheres. An international consortium comprising universities, SMEs, research institutions, and industry has been formed in order to develop this technology within the MEESST project. The latter is funded by the Future and Emerging Technologies (FET) program of the European Commission’s Horizon 2020 scheme (grant no. 899298). Atmospheric entry imposes one of the harshest environments which a spacecraft can experience. The combination of hypersonic velocities and the rapid compression of atmospheric particles by the spacecraft leads to high-enthalpy, partially ionised gases forming around the vehicle. This inhibits radio communications and induces high thermal loads on the spacecraft surface. For the former problem, spacecraft can sometimes rely on satellite constellations for communicating through the plasma wake and therefore preventing the blackout. On the other hand, expensive, heavy, and non-reusable thermal protection systems (TPS) are needed to dissipate the severe thermal loads. Such TPS can represent up to 30% of an entry vehicles weight, and especially for manned missions they can reduce the cost- efficiency by sacrificing payload mass. Such systems are also prone to failure, putting the lives of astronauts at risk. The use of electromagnetic fields to exploit MHD principles has long been considered as an attractive solution for tackling the problems described above. By pushing the boundary layer of the ionized gas layer away from the spacecraft, the thermal loads can be reduced, while also opening a magnetic window for radio communications and mitigating the blackout phenomenon. The application of this MHD-enabled system has previously not been demonstrated in realistic conditions due to the required large magnetic fields (on the order of Tesla or more), which for conventional technologies would demand exceptionally heavy and power-hungry electromagnets. High-temperature superconductors (HTS) have reached a level of industrial maturity sufficient for them to act as a key enabling technology for this application. Thanks to superior current densities, HTS coils can offer the necessary low weight and compactness required for space applications, with the ability to generate the strong magnetic fields needed for entry purposes. This paper provides an overview of the MEESST project, including its goals, methodology and some preliminary design considerations. [less ▲]

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See detailDoes waste management affect firm performance? International evidence
Derouiche, Imen UL; Gull, Ammar Ali; Atif, Muhammad et al

in Economic Modelling (2022), 114

This study examines an important yet underexplored aspect of firms’ sustainability practices, i.e., waste management, in order to analyze its impact on financial performance. Although the extant ... [more ▼]

This study examines an important yet underexplored aspect of firms’ sustainability practices, i.e., waste management, in order to analyze its impact on financial performance. Although the extant literature has focused on various aspects of sustainability, the impact of waste management, which has disastrous consequences for the climate and firm performance, remains largely unexplored. Thus, using the 2002–2019 data of listed firms from 41 countries, we found a significantly negative (positive) relationship between waste generation (recycling) and financial performance. Our findings are robust to alternative variables, sub-sample analysis, and identification strategies. Moreover, a channel analysis showed that this relationship is influenced by operating costs, ESG performance-based compensation, industry nature, the Paris agreement on climate change, and the global financial crisis. Overall, the findings suggest that environmental initiatives are beneficial for firms and present important policy implications for regulators and firms. [less ▲]

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See detailDigitizing Inclusion in a Changing World: Comparing insights into four European countries for matching new global realities
Andersen, Katja Natalie UL; Vogt, Michaela; Bagger, Anette et al

Scientific Conference (2022)

Inclusion and digitalization are among the driving forces in global discourses on education and learning. These global realities cause extensive transformations at local, national, and international ... [more ▼]

Inclusion and digitalization are among the driving forces in global discourses on education and learning. These global realities cause extensive transformations at local, national, and international levels. At the same time, the goal of inclusion is directly interwoven with local conditions, understandings, and historically grown valuations. The concept oscillates between universally shared norms and highly divergent local implementations. Regarding the focus of the symposium it can be assumed that especially in the course of digitalization as one main reaction of the corona pandemic, learning materials are not only expected to be inclusion oriented but also need to be combinable with digital demands to address alls kinds of inequalities amongst students appropriately. Learning materials thus are a central momentum to expatiate on transformations of a changing world. In correspondence with the congress theme, the symposium will therefore discuss how a reflection on centrifugal forces of interdependence and individuality can be located in the context of the immediate everyday life in schools and educational practice. In order to be able to discuss these tensions and current changes within educational practices starting from learning materials, an anchor point is needed in order to open up the international comparison of local specifics. The anchor point for this symposium is a criteria catalog which enables the international comparison of learning materials in their cultural contexts and provides a visualization of local particularities in the field of learning materials (Vogt et al. 2021). If these results are put into relation with the inclusive landscapes in different countries, further insights of relevance for inclusion as a global topic can be generated. The data basis springs from the ITM project (2018-2021, funded by Erasmus+) and other international collections of material. Speakers with expertise in regard to the triangulation of learning materials, inclusion and digitalization from four European universities (Ostrava, Czech Republic; Bielefeld, Germany; Luxemburg and Örebro, Sweden) present their findings in the symposium, more in-depth talks about national perspectives as well as a concluding wrap up. The following research questions are a guideline for each section of the symposium: 1. What are the local specifics and constellations as well as understandings of inclusion as a global reality that are being mirrored in teaching material? 2. How can the international comparison of teaching material impact the advancement of inclusion on a local level? 3. How can international comparative educational research become a driving force in the productive negotiation of globally relevant tensions? The contributions are methodologically based on group discussions and expert interviews about selected learning materials, their quality and criteria for evaluating them. These exchanges have been evaluated with the qualitative content analysis by Mayring (2015). Discourse analysis and context analysis were applied. Furthermore, source corpora of learning material were developed and materials were examined using a qualitative content analysis. This refers to the ITM project from Luxembourg, Örebro and Bielefeld University (Erasmus funding line, 2018-2021) as well as the contribution by Ostrava University. The material mainly comes from primary school education and takes into account various subjects, e.g. mathematics and natural sciences. By looking at the results of the interviews and the analysis of teaching materials as well as on the findings about the cultural and local conditions the presenters were able to develop a deeper understanding about how learning materials are set up for inclusive learning processes and about the underpinning understanding of inclusion in different cultural settings. This is the needed foundation to contextualize everyday practices of teaching and learning with the demands of education within the digital condition. [less ▲]

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See detailAssessing Luxembourg‘s inclusive STEM materials
Andersen, Katja Natalie UL

Scientific Conference (2021, September 10)

In the country of Luxembourg with its three official languages Luxembourgish, German and French, multilingualism is of special importance. The education system is based on a trilingual approach, starting ... [more ▼]

In the country of Luxembourg with its three official languages Luxembourgish, German and French, multilingualism is of special importance. The education system is based on a trilingual approach, starting with Luxembourgish as the language of instruction in Cycle 1, which corresponds to pre-school classes. In Cycle 2 (6- to 7-year-olds), German is the language of alphabetization and instruction, supplemented by French lessons in the oral use (7-year-olds) and in written language (8-year-olds). In addition, the schoolchildren speak multiple family languages as the country of Luxembourg has the highest percentage of schoolchildren with migration background within the EU (STATEC, 2020). Considering this special situation in the Luxembourgish school system, language has a high impact on the children’s participation and competence development in all subjects, but especially in MINT learning (Andersen, 2020). The results of the PISA studies show that Luxembourgish pupils with a migrant background have particular difficulties in acquiring sufficient competences in mathematics and science if none of the three school languages is their mother tongue (SCRIPT & EMACS, 2014; Ugen & Fischbach, 2017). This impedes their access to educational options and higher levels of schooling. Proceeding from these considerations, we see inclusion in a very wide conception that is not limited to those pupils with special needs or disabilities, for example, those with visual and hearing impairments, restricted movement and/or learning difficulties. Inclusion, however, also applies to all those children who are at risk of marginalisation or underachievement because of their language competences. This presentation focuses on materials in the subject mathematics that are used in inclusive settings at primary school in Luxembourg. Along the material “Einstern”, we show what challenges the multilingual children are facing in the use of this material and what kind of tasks the schoolchildren are working on when using the “Einstern” material. This presentation critically analyses selected tasks, including exemplary tasks that show potential for the support of the children’s inclusion, but also reflecting on tasks that may hinder inclusion for language reasons. [less ▲]

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See detailRenate Brosch and Kylie Crane, eds. Visualising Australia: Images, Icons, Imaginations.
Steveker, Lena UL

in Journal for the Study of British Cultures (2015), 22(2), 131-134

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