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See detailCorporate Managers, Price Noise and the Investment Factor
Lehnert, Thorsten UL

in Financial Innovation (2022)

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See detailArea-Power Analysis of FFT Based Digital Beamforming for GEO, MEO, and LEO Scenarios
Palisetty, Rakesh UL; Eappen, Geoffrey UL; Gonzalez Rios, Jorge Luis UL et al

Scientific Conference (2022, June 19)

Satellite communication systems can provide seamless wireless coverage directly or through complementary ground terrestrial components and are projected to be incorporated into future wireless networks ... [more ▼]

Satellite communication systems can provide seamless wireless coverage directly or through complementary ground terrestrial components and are projected to be incorporated into future wireless networks, particularly 5G and beyond networks. Increased capacity and flexibility in telecom satellite payloads based on classic radio frequency technology have traditionally translated into increased power consumption and dissipation. Much of the analog hardware in a satellite communications payload can be replaced with highly integrated digital components that are often smaller, lighter, and less expensive, as well as software reprogrammable. Digital beamforming of thousands of beams simultaneously is not practical due to the limited power available onboard satellite processors. Reduced digital beamforming power consumption would enable the deployment of a full digital payload, resulting in comprehensive user applications. Beamforming can be implemented using matrix multiplication, hybrid methodology, or a discrete Fourier transform (DFT). Implementing DFT via fast Fourier transform (FFT) reduces the power consumption, process time, hardware requirements, and chip area. Therefore, in this paper, area-power efficient FFT architectures for digital beamforming are analyzed. The area in terms of look up tables (LUTs) is estimated and compared among conventional FFT, fully unrolled FFT, and a 4-bit quantized twiddle factor (TF) FFT. Further, for the typical satellite scenarios, area, and power estimation are reported. [less ▲]

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See detailIntroduction
Steveker, Lena UL; Frenk, Joachim

in Critical Survey (2022), 34(2), 1-9

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See detailApproximating WCRT through the aggregation of short simulations with different initial conditions: application to TSN
Keller, Patrick UL; Navet, Nicolas UL

in 30th International Conference on Real-Time Networks and Systems (RTNS ’22) (2022, June)

Assessing traversal times is the main concern in the verification of embedded real-time networks. Schedulability analysis, as it provides firm guarantees, is the preferred technique for the designers of ... [more ▼]

Assessing traversal times is the main concern in the verification of embedded real-time networks. Schedulability analysis, as it provides firm guarantees, is the preferred technique for the designers of critical systems. There are however contexts where it is not economically or technically feasible to develop one, typically when the software and hardware components have not been designed with predictability in mind, e.g. as soon as TCP-based traffic is involved in network communication or when the hardware platform is too complex (e.g. heterogeneous System-on-Chips). In this paper, we study if it is possible to improve the ability of simulation to observe large traversal times, by running many short simulations with appropriately chosen simulation time and varying initial offsets of the stations on the network. The de-facto standard approach to assess maximal traversal times is to run a single long simulation with synchronized node start offsets and to use randomized node clock drifts inside an acceptable range. This approach is known to yield high traversal times but is not parallelizable. We propose an alternative approach consisting in splitting the simulation time over multiple shorter simulations with, optionally, randomized node start offsets. We evaluate the optimization potential of this simple approach on several realistic network configurations by comparing long simulations to aggregated short simulations, with and without synchronized node start offsets. We observe, considering all flows, that this allows a median improvement of up to 21.3% in terms of maximum traversal time observed, for the same simulation time budget. Additional randomization of the node start offsets showed further improvements of up to 4.8% in our experiments. Results from this line of work can be used to estimate the pessimism of schedulability analyses and verify systems for which no analysis is available. [less ▲]

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See detailLes archives du Web, des sources aux données
Schafer, Valerie UL

Scientific Conference (2022, May 20)

This keynote during Humanistica 2022 aimed to retrace 15 years of evolution of web archiving and web archives' studies. It also presented some research projects like the current Hivi, WARCnet and AWAC2 ... [more ▼]

This keynote during Humanistica 2022 aimed to retrace 15 years of evolution of web archiving and web archives' studies. It also presented some research projects like the current Hivi, WARCnet and AWAC2 projects. [less ▲]

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See detailModèles participatifs pour interpréter le passé
Cauvin, Thomas UL

Speeches/Talks (2022)

Project description Ecole d’été « Participation & Démocratie » 16-20 Mai (Esch-Belval ; Esch-sur-Alzette; Dudelange) La plateforme de la démocratie participative/Université du Luxembourg a le grand ... [more ▼]

Project description Ecole d’été « Participation & Démocratie » 16-20 Mai (Esch-Belval ; Esch-sur-Alzette; Dudelange) La plateforme de la démocratie participative/Université du Luxembourg a le grand plaisir d’accueillir la cinquième édition de l’école d’été internationale (International Summer School) “Participation et démocratie”. Dans le prolongement des précédentes éditions, l’école d’été vise à approfondir les réflexions sur le fonctionnement de nos démocraties représentatives et sur les différents processus démocratiques – plus ou moins innovants – visant à promouvoir une participation plus directe et délibérative des citoyens. S’adressant aux étudiant·e·s en sciences politiques et sociales, ainsi qu’aux praticien·ne·s souhaitant renforcer leurs compétences, l’École d’été offre une semaine de formation interactive et personnalisée avec des enseignant·e·s reconnu·e·s internationalement. Elle propose un encadrement adapté aux étudiant·e·s en fin de master et aux doctorant·e·s à différents stades de leur avancement. Elle propose aussi aux praticien·ne·s de mettre en dialogue leur pratiques avec les évolutions de la gouvernance et de la participation citoyenne. L’ambition est de confronter les participant·e·s aux pratiques de recherche de chercheurs·euses confirmé·e·s, tout en donnant une opportunité de présenter ses travaux et de recevoir les commentaires et recommandations de des intervenant·e·s invité·es, mais aussi des autres participant·e·s. Cette école d’été est le fruit d’une collaboration forte entre cinq universités francophones d’excellence : Sciences Po Bordeaux, l’Université Laval, l’Université libre de Bruxelles, l’Université de Lausanne et l’Université du Luxembourg. Cela en fait une école unique dans le champ des sciences sociales et de la science politique francophone notamment par sa capacité à comparer les approches, les cas nationaux et leurs transformations. La spécificité de cette école est d’être l’une des rares en Europe à faire du français la langue de travail principale, même si l’anglais est utilisé pour certaines interventions. La présente édition marque la première édition de l’école à Luxembourg après que celle-ci se soit tenue à deux reprises à Bordeaux en 2016 et 2021, à Laval en 2017, à Bruxelles en 2018 et à Lausanne en 2020. Cette édition sera aussi l’occasion d’ouvrir un regard sur les nombreuses expériences participatives du Luxembourg et de saluer la collaboration fructueuse entre quatre acteurs engagés dans la l’étude et la promotion de la démocratie à Luxembourg : la Plateforme Luxembourgeoise de la Démocratie Participative (PLDP), la Chaire de Recherche en Études Parlementaires, ETICC et la ville de Dudelange en tant que ville pilote dans la démocratie participative. L’école sera organisée autour des thématiques suivantes : Y-a-t-il une demande pour plus de participation à l’ère de la désinformation ? Etat des lieux des consultations citoyennes Participation des jeunes et budget participatif Participation citoyenne dans les tiers lieux : le cas de Esch2022 Capitale européenne de la culture Digitalisation des campagnes politiques et effets sur la participation [less ▲]

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See detailBenchmarking Low-Frequency Variant Calling With Long-Read Data on Mitochondrial DNA
Lüth, Theresa; Schaake, Susen; Grünewald, Anne UL et al

in Frontiers in Genetics (2022), 13

Background: Sequencing quality has improved over the last decade for long-reads, allowing for more accurate detection of somatic low-frequency variants. In this study, we used mixtures of mitochondrial ... [more ▼]

Background: Sequencing quality has improved over the last decade for long-reads, allowing for more accurate detection of somatic low-frequency variants. In this study, we used mixtures of mitochondrial samples with different haplogroups (i.e., a specific set of mitochondrial variants) to investigate the applicability of nanopore sequencing for low-frequency single nucleotide variant detection.Methods: We investigated the impact of base-calling, alignment/mapping, quality control steps, and variant calling by comparing the results to a previously derived short-read gold standard generated on the Illumina NextSeq. For nanopore sequencing, six mixtures of four different haplotypes were prepared, allowing us to reliably check for expected variants at the predefined 5%, 2%, and 1% mixture levels. We used two different versions of Guppy for base-calling, two aligners (i.e., Minimap2 and Ngmlr), and three variant callers (i.e., Mutserve2, Freebayes, and Nanopanel2) to compare low-frequency variants. We used F<sub>1</sub> score measurements to assess the performance of variant calling.Results: We observed a mean read length of 11 kb and a mean overall read quality of 15. Ngmlr showed not only higher F<sub>1</sub> scores but also higher allele frequencies (AF) of false-positive calls across the mixtures (mean F<sub>1</sub> score = 0.83; false-positive allele frequencies < 0.17) compared to Minimap2 (mean F<sub>1</sub> score = 0.82; false-positive AF < 0.06). Mutserve2 had the highest F<sub>1</sub> scores (5% level: F<sub>1</sub> score >0.99, 2% level: F<sub>1</sub> score >0.54, and 1% level: F<sub>1</sub> score >0.70) across all callers and mixture levels.Conclusion: We here present the benchmarking for low-frequency variant calling with nanopore sequencing by identifying current limitations. [less ▲]

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See detailThe impact of parental migration on psychological well-being of children in Ghana
Raturi, Radhika; Cebotari, Victor UL

in Journal of Ethnic and Migration Studies (2022)

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See detailMasse des archives du web et circulation des contenus
Pailler, Fred UL

Presentation (2022, May 13)

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See detailPaket mit vielen Einzelteilen - Der Digital Services Act und der Mediensektor
Cole, Mark David UL

Article for general public (2022)

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See detailTeaching Public History in UK Higher Education
Cauvin, Thomas UL

Speeches/Talks (2022)

About this event Welcome: The AHRC-funded 'What is Public History Now?' Network is thrilled to invite you to our first workshop 'Teaching Public History in UK Higher Education'. We hope you'll join us for ... [more ▼]

About this event Welcome: The AHRC-funded 'What is Public History Now?' Network is thrilled to invite you to our first workshop 'Teaching Public History in UK Higher Education'. We hope you'll join us for a day of discussions on public history in higher education, ranging from intellectual traditions to pedagogy and programme design. Schedule: 13 May, 10am-12am; 2pm-4pm; 4:30-6:00pm. 10am-11am: Intellectual traditions and the history of UK public history 11am-12pm: Public history in the UK and in International Context What is distinct about public history in the UK? What are the particular dynamics of regions/smaller nations? How does this sit within the international context? 2pm-4pm: Pedagogy and Programme Design What are we teaching? Who are we teaching? How are we teaching? Why are we teaching it? The growth of public history programmes and the inflection of wider history teaching with public history. The relationship of public history and heritage programmes. Break out rooms to discuss and compare modules and programmes. 4:30pm-5:30pm: Policy and Institutional Support Why now? The impact agenda and the neoliberal university. What resources are we being given or not given? 5:30pm-6:00pm: Final Thoughts and Plans for the Next Workshop [less ▲]

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See detailGenetic Criticism and Analysis of Interface Design: A Case Study
Armaselu, Florentina UL

in Digital Studies/Le champ numérique (2022), 12(1), 137

The paper proposes a methodology that combines theoretical and practical aspects from human-computer interaction (HCI) and genetic criticism to trace and analyse prototype evolution. A case study ... [more ▼]

The paper proposes a methodology that combines theoretical and practical aspects from human-computer interaction (HCI) and genetic criticism to trace and analyse prototype evolution. A case study illustrates this type of enquiry by examining the iterations and the dynamics of change in the design and development of the Transviewer, an interface for digital editions. The initial assumption is that such an analysis can inform existing models in interface design and possibly provide new ground for discussion in humanistic HCI. For instance by fostering broader reflections on software production as a technological and cultural artefact and the gradual shaping of the principles and metaphors underlying the construction of a certain type of knowledge, argument, or interpretation through an interface. [less ▲]

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See detailDigging into web archives of the COVID crisis
Schafer, Valerie UL; Joshgun, Sirajzade; Susan, Aasman

Presentation (2022, May 11)

This presentation aimed at presenting the challenges, methodologies and issues related to the analysis of the IIPC COVID collection of web archives through a collaboration with the Archive Unleashed Team.

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See detailContemporary Teaching
Baumann, Isabell Eva UL

Presentation (2022, May 11)

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See detailHandbuch Medienrecht - Recht der elektronischen Medien
Cole, Mark David UL; Kreile, Johannes; Dörr, Dieter

Book published by Verlag Recht undWirtschaft - 3 (2022)

Das Handbuch stellt umfassend die rechtlichen Rahmenbe-dingungen für die elektronischen Medien dar. Schwerpunkt bildet das Rundfunk- und Telemedienrecht, so-weit es sich um Inhalte von journalistischer ... [more ▼]

Das Handbuch stellt umfassend die rechtlichen Rahmenbe-dingungen für die elektronischen Medien dar. Schwerpunkt bildet das Rundfunk- und Telemedienrecht, so-weit es sich um Inhalte von journalistischer Relevanz han-delt. Daneben werden die wesentlichen Bezüge zum Tele-kommunikationsrecht und die praxisrelevanten zivilrechtli-chen Probleme aus dem Werberecht, Medienurheberrecht und mögliche Ansprüche der Medienunternehmen und der von der Medienberichterstattung betroffenen Privatpersonen dargestellt. Zudem werden die relevanten technischen Grundlagen im Hinblick auf die behandelten audiovisuellen Medien erläutert Wichtige Fälle aus der Praxis runden das Handbuch ab. Die vollständig überarbeitete und umfänglich erweiterte Neuauflage berücksichtigt die Medienordnung, wie sie sich aus der EU-Richtlinie über audiovisuelle Mediendienste von 2018 und dem deutschen Rundfunk- und Telemedienrecht aus dem Medienstaatsvertrag, dem TMG und verwandten Regelungswerken ergibt, wobei alle Änderungen des Jahres 2021 eingearbeitet sind und auch Auswirkungen aktueller Gesetzesvorhaben dargestellt werden. [less ▲]

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See detail3rd Corvus Applied History Workshop : Practices of Applied History: Questions, Answers, Discussions
Cauvin, Thomas UL

Speeches/Talks (2022)

Situated at the axis of societal issues and academic research, the renewed popularity of applied history has raised several questions about its practice. The most direct questions come from non-academic ... [more ▼]

Situated at the axis of societal issues and academic research, the renewed popularity of applied history has raised several questions about its practice. The most direct questions come from non-academic partners. What can one expect of applied historians? How will those expectat ions be met? What if the methods and tools of applied history fall short of their goal? And is it even that important that organizations learn to think about the past , when they are oriented towards the present and future? Other questions stem from academic concerns. Is applied history more than a reiteration of public history? Do societal questions and concerns have a place within academic history departments? And if so, what are the ethical boundaries of this type of research? Some of these topics remain open questions. Some have been eloquently answered. Some remain subject of (fierce) discussion. Therefore, this third Corvus applied history workshop joins academic and non-academic expertise in order to assess and debate the value of applied history practices in different sectors. Discussants: Thomas Cauvin, Associate Professor of Public History, Luxembourg Centre for Contemporary and Digital History (C²DH) Gill Bennett OBE Senior Associate Fellow, Royal United Services Institute (RUSI) Foreign, Commonwealth & Development Office (FCDO) Historians Pieter Huistra Assistant Professor Theory of History, University of Utrecht Jason Steinhauer Global Fellow, The Wilson Center Koen Vandenweyer Delegation of Flanders to the European Union Alexandra Van den Berghe Corvus Research Project, KU Leuven Programme: 9.15am : Welcome 9.30am : New name, old practices? *(what is already out there)* 11am : Coffee break 11.30am : Where, when, how? *(what should be out there)* 1pm : Lunch break 2pm : What (not) to do? *(what should not be out there)* 3.30pm : Conclusions 3.45pm : End Starting questions: 9.30am : New name, old practices? *(what is already out there)* In these last few years t he notion of ‘Applied History’ has seen renewed popular ity. Proponents thereby often promise to reinvigorate the ‘long lost pr actice’ of using histor y in the present. Yet teachers, journalists, archivists, politicians, mar keteers and many others (including academics) have never stopped applying history in their professional activit ies. So do you think that there is already enough ‘applied history’ out there, particularly in your sector? 11.30am : Where, when, how? *(what should be out there)* The ‘next step’ in Applied History is usually considered to be the development of new ways of applying historical insight to issues in the present . This of course begs the question what those methods should be designed to do – what issues deserve attent ion and which new methods and tools look promising? In other words, what can or should applied history try to achieve as its ‘next step’? 2pm : What (not) to do? *(what should not be out there)* Not everybody believes that applying past insights to present concerns is a good idea. Some see no value in historical information, nor in historical thinking. Others fear the applicat ion of history in the present, as uses of the past become abuses of the past far too quickly. Therefor e, what do you think should be absolutely avoided when ‘doing ’ applied history? [less ▲]

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See detailPhD Day - Complex Particle Laden Fluid Structure Interaction
Adhav, Prasad UL

Presentation (2022, May 10)

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