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See detailDesigning different features of an interactive tabletop application to support collaborative problem-solving
Afkari, Hoorieh; Maquil, Valérie; Arend, Béatrice UL et al

Poster (2020)

The design space of tangible and multi-touch tabletop interfaces is complex, and little is known about how the different characteristics of tangible and multi-touch interactive features affect collabora ... [more ▼]

The design space of tangible and multi-touch tabletop interfaces is complex, and little is known about how the different characteristics of tangible and multi-touch interactive features affect collabora- tion strategies. With this work, we report on five different features designed for an interactive tabletop application to support collabo- rative problem-solving. We present the design details and describe preliminary results obtained from a user study with 15 participants. [less ▲]

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See detailGrenzen, Kooperation und Bildungsmobilität. Einblicke in grenzünberschreitende Zusammenarbeit
Nienaber, Birte UL

in ARL Nachrichten (2020), 2020(3), 35-38

The article analyses cross-border education on different levels.

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See detailVPS-SLAM: Visual Planar Semantic SLAM for Aerial Robotic Systems
Bavle, Hriday UL; Puente, P. De La; How, J. P. et al

in IEEE Access (2020), 8

Indoor environments have abundant presence of high-level semantic information which can provide a better understanding of the environment for robots to improve the uncertainty in their pose estimate ... [more ▼]

Indoor environments have abundant presence of high-level semantic information which can provide a better understanding of the environment for robots to improve the uncertainty in their pose estimate. Although semantic information has proved to be useful, there are several challenges faced by the research community to accurately perceive, extract and utilize such semantic information from the environment. In order to address these challenges, in this paper we present a lightweight and real-time visual semantic SLAM framework running on board aerial robotic platforms. This novel method combines low-level visual/visual-inertial odometry (VO/VIO) along with geometrical information corresponding to planar surfaces extracted from detected semantic objects. Extracting the planar surfaces from selected semantic objects provides enhanced robustness and makes it possible to precisely improve the metric estimates rapidly, simultaneously generalizing to several object instances irrespective of their shape and size. Our graph-based approach can integrate several state of the art VO/VIO algorithms along with the state of the art object detectors in order to estimate the complete 6DoF pose of the robot while simultaneously creating a sparse semantic map of the environment. No prior knowledge of the objects is required, which is a significant advantage over other works. We test our approach on a standard RGB-D dataset comparing its performance with the state of the art SLAM algorithms. We also perform several challenging indoor experiments validating our approach in presence of distinct environmental conditions and furthermore test it on board an aerial robot. Video:https://vimeo.com/368217703Released Code:https://bitbucket.org/hridaybavle/semantic_slam.git. [less ▲]

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See detailMarkov Chain Monte Carlo and the Application to Geodetic Time Series Analysis
Olivares Pulido, German UL; Teferle, Felix Norman UL; Hunegnaw, Addisu UL

in Montillet, Jean-Philippe; Bos, Machiel (Eds.) Geodetic Time Series Analysis in Earth Sciences (2020)

The time evolution of geophysical phenomena can be characterised by stochastic time series. The stochastic nature of the signal stems from the geophysical phenomena involved and any noise, which may be ... [more ▼]

The time evolution of geophysical phenomena can be characterised by stochastic time series. The stochastic nature of the signal stems from the geophysical phenomena involved and any noise, which may be due to, e.g., un-modelled effects or measurement errors. Until the 1990's, it was usually assumed that white noise could fully characterise this noise. However, this was demonstrated to be not the case and it was proven that this assumption leads to underestimated uncertainties of the geophysical parameters inferred from the geodetic time series. Therefore, in order to fully quantify all the uncertainties as robustly as possible, it is imperative to estimate not only the deterministic but also the stochastic parameters of the time series. In this regard, the Markov Chain Monte Carlo (MCMC) method can provide a sample of the distribution function of all parameters, including those regarding the noise, e.g., spectral index and amplitudes. After presenting the MCMC method and its implementation in our MCMC software we apply it to synthetic and real time series and perform a cross-evaluation using Maximum Likelihood Estimation (MLE) as implemented in the CATS software. Several examples as to how the MCMC method performs as a parameter estimation method for geodetic time series are given in this chapter. These include the applications to GPS position time series, superconducting gravity time series and monthly mean sea level (MSL) records, which all show very different stochastic properties. The impact of the estimated parameter uncertainties on sub-sequentially derived products is briefly demonstrated for the case of plate motion models. Finally, the MCMC results for weekly downsampled versions of the benchmark synthetic GNSS time series as provided in Chapter 2 are presented separately in an appendix. [less ▲]

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See detailLe dépaysement ou quand tremble l'écriture de Jean Portante
Raus, Tonia UL

in Thiltges, Sébastian; Solte-Gresser, Christiane (Eds.) Écologie culturelle et cultures écologiques dans la Grande Région (2020)

Portante’s work develops a genuine poetics of space. On the one hand: the geo- graphical space, shaped by the back and forth between the Terres Rouges of Differdange, the host land, and the homeland of ... [more ▼]

Portante’s work develops a genuine poetics of space. On the one hand: the geo- graphical space, shaped by the back and forth between the Terres Rouges of Differdange, the host land, and the homeland of L’Aquila, the trembling land since the earthquake of 2009. On the other hand: the textual space thus generated, shaped by the symbolism of the in-between (French/Italian, fiction/non-fictionnal). The topoi of the earth and the (family) home, correlated to the matrices of the work, the mother tongue and family history, are constantly revisited by the author, and can therefore be re-read under the double prism of ecopoetics and material ecocriticism. The North/South tension (Luxembourg/Italy) can then be considered afresh for its poetic and narrative transformation. This article will thus try to formulate a hypothesis for an ecopoetic reading of Portante’s work centred on the pivot point that constitutes – for both writing and work – the L’Aquila earthquake, which engages the work in a new cycle. This trembling of the writing will then be addressed through the notion of “dépaysement”, in the polysemic richness that offers this term, or even motif: from a literal to a political and poetic meaning. [less ▲]

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See detailDon't Trust Me, Test Me: 100% Code Coverage for a 3rd-party Android App
Pilgun, Aleksandr UL

in Pilgun, Aleksandr (Ed.) 2020 27th Asia-Pacific Software Engineering Conference (APSEC) (2020)

The incompleteness of 3rd-party app testing is an accepted fact in Software Engineering. This issue makes it impossible to verify the app functionality and to confirm its safety to the end-user. To solve ... [more ▼]

The incompleteness of 3rd-party app testing is an accepted fact in Software Engineering. This issue makes it impossible to verify the app functionality and to confirm its safety to the end-user. To solve this problem, enterprises developed strict policies. A company, willing to use modern apps, may perform an expensive security analysis, rely on trust or forbid the app. These strategies may lead companies to high direct and indirect spending with no guarantee of safety. In this work, we present a novel approach, called Dynamic Binary Shrinking, that allows a user to review app functionality and leave only tested code. The shrunk app produces 100% instruction coverage on observed behaviors and in this way guarantees the absence of unexplored, and therefore, potentially malicious code. On our running examples, we demonstrate that apps use less than 20% of the codebase. We developed an approach and the ACVCut tool to shrink Android apps towards the executed code. Repository — http://github.com/pilgun/acvcut. [less ▲]

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See detailMitochondrial translation and dynamics synergistically extend lifespan in C. elegans through HLH-30.
Liu, Yasmine J.; McIntyre, Rebecca L.; Janssens, Georges E. et al

in The Journal of cell biology (2020), 219(6),

Mitochondrial form and function are closely interlinked in homeostasis and aging. Inhibiting mitochondrial translation is known to increase lifespan in C. elegans, and is accompanied by a fragmented ... [more ▼]

Mitochondrial form and function are closely interlinked in homeostasis and aging. Inhibiting mitochondrial translation is known to increase lifespan in C. elegans, and is accompanied by a fragmented mitochondrial network. However, whether this link between mitochondrial translation and morphology is causal in longevity remains uncharacterized. Here, we show in C. elegans that disrupting mitochondrial network homeostasis by blocking fission or fusion synergizes with reduced mitochondrial translation to prolong lifespan and stimulate stress response such as the mitochondrial unfolded protein response, UPRMT. Conversely, immobilizing the mitochondrial network through a simultaneous disruption of fission and fusion abrogates the lifespan increase induced by mitochondrial translation inhibition. Furthermore, we find that the synergistic effect of inhibiting both mitochondrial translation and dynamics on lifespan, despite stimulating UPRMT, does not require it. Instead, this lifespan-extending synergy is exclusively dependent on the lysosome biogenesis and autophagy transcription factor HLH-30/TFEB. Altogether, our study reveals the mechanistic crosstalk between mitochondrial translation, mitochondrial dynamics, and lysosomal signaling in regulating longevity. [less ▲]

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See detailA holistic view on sector coupling
Fridgen, Gilbert UL; Keller, Robert; Körner, Marc-Fabian et al

in Energy Policy (2020), 147

Sector coupling (SC) describes the concept of a purposeful connection and interaction of energy sectors to increase the flexibility of supply, demand, and storing. While SC is linked to research on smart ... [more ▼]

Sector coupling (SC) describes the concept of a purposeful connection and interaction of energy sectors to increase the flexibility of supply, demand, and storing. While SC is linked to research on smart energy system and locates itself in the research stream of 100% renewable energy systems, it currently focusses on counteracting challenges of temporal energy balancing induced by the intermittent feed-in of renewable energy sources. As regarding the coupling of grids, SC currently remains within classical energy grids. It does not exploit the coupled sectors’ potential to its full extent and, hence, lacks a holistic view. To include this view, we call on the use of all grids from coupled sectors for spatial energy transportation, resulting in an infrastructural system. By using the different loss structures of coupled grids, we illustrate how a holistic view on SC minimizes transportation losses. We argue that SC should include all grids that transport whichever type of energy (e.g., even transportation or communication grids). Ultimately, we derive and discuss implications relevant for policy makers and research: We illustrate why regulation and market design should be aligned in a way that the resulting incentives within and across the different sectors support climate change goals. [less ▲]

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See detailInteroception, stress and physical symptoms in stress-associated diseases
Schulz, André UL; Schultchen, Dana; Vögele, Claus UL

in European Journal of Health Psychology (2020), 27(1), 132-153

The brain and peripheral bodily organs continuously exchange information. Exemplary, interoception refers to the processing and perception of ascending information from the body to the brain. Stress ... [more ▼]

The brain and peripheral bodily organs continuously exchange information. Exemplary, interoception refers to the processing and perception of ascending information from the body to the brain. Stress responses involve a neurobehavioral cascade, which includes the activation of peripheral organs via neural and endocrine pathways and can thus be seen as an example for descending information on the brain-body axis. Hence, the interaction of interoception and stress represents bi-directional communication on the brain-body axis. The main hypothesis underlying this review is that the dysregulation of brain-body communication represents an important mechanism for the generation of physical symptoms in stress-related disorders. The aims of this review are, therefore, (1.) to summarize current knowledge on acute stress effects on different stages of interoceptive signal processing, (2.) to discuss possible patterns of abnormal brainbody communication (i.e., alterations in interoception and physiological stress axes activation) in mental disorders and chronic physical conditions, and (3.) to consider possible approaches to modify interoception. Due to the regulatory feedback loops underlying brain-body communication, the modification of interoceptive processes (ascending signals) may, in turn, affect physiological stress axes activity (descending signals), and, ultimately, also physical symptoms. [less ▲]

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See detailFAMILY FIRM PERFORMANCE OVER THE BUSINESS CYCLE: A META-ANALYSIS
Hansen, Christopher UL; Block, Joern; Neuenkirch, Matthias

in Journal of Economic Surveys (2020), 34(3), 476-511

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See detailMental health issues in health care professionals facing a pandemic.
Gomez Bravo, Raquel UL; Jobim Fischer, Vinicius UL; Lygidakis, Charilaos et al

in The Ends of Humanities (2020), 2

The Sars-CoV-2 pandemic puts an extreme strain on health care professionals, who are at a high risk of psychological distress and other mental health problems. Contributing factors include facing ... [more ▼]

The Sars-CoV-2 pandemic puts an extreme strain on health care professionals, who are at a high risk of psychological distress and other mental health problems. Contributing factors include facing uncertainty, the often unbearable workload, shortages in personal protective equipment and treatments, an overwhelming flow of information, and changes in habitual roles and tasks. Existing studies show that in similar situations, they also experience stigmatization, as well as fear of infection for themselves and their families. This article summarizes the existing research on the mental health issues in health care professionals in this context, including risk factors, and interventions that can be implemented to promote mental well-being in front line professionals. [less ▲]

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See detailSECAT: Quantifying Protein Complex Dynamics across Cell States by Network-Centric Analysis of SEC-SWATH-MS Profiles.
Rosenberger, George; Heusel, Moritz; Bludau, Isabell et al

in Cell systems (2020), 11(6), 589-6078

Protein-protein interactions (PPIs) play critical functional and regulatory roles in cellular processes. They are essential for macromolecular complex formation, which in turn constitutes the basis for ... [more ▼]

Protein-protein interactions (PPIs) play critical functional and regulatory roles in cellular processes. They are essential for macromolecular complex formation, which in turn constitutes the basis for protein interaction networks that determine the functional state of a cell. We and others have previously shown that chromatographic fractionation of native protein complexes in combination with bottom-up mass spectrometric analysis of consecutive fractions supports the multiplexed characterization and detection of state-specific changes of protein complexes. In this study, we extend co-fractionation and mass spectrometric data analysis to perform quantitative, network-based studies of proteome organization, via the size-exclusion chromatography algorithmic toolkit (SECAT). This framework explicitly accounts for the dynamic nature and rewiring of protein complexes across multiple cell states and samples, thus, elucidating molecular mechanisms that are differentially implemented across different experimental settings. Systematic analysis of multiple datasets shows that SECAT represents a highly scalable and effective methodology to assess condition/state-specific protein-network state. A record of this paper's transparent peer review process is included in the Supplemental Information. [less ▲]

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See detailSearch-based adversarial testing and improvement of constrained credit scoring systems
Ghamizi, Salah UL; Cordy, Maxime UL; Gubri, Martin UL et al

in ACM Joint European Software Engineering Conference and Symposium on the Foundations of Software Engineering (ESEC/FSE '20), November 8-13, 2020 (2020)

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See detailRecourir à la collégialité pour réosudre les complexités de la DSR
Hambly, Jessica; Gill, Nick; Vianelli, Lorenzo UL

in Forced Migration Review (2020), (65), 32-35

Les études menées dans un certain nombre de juridictions européennes suggèrent qu’au stade du recours, les formations collégiales améliorent la qualité et l’équité du processus de détermination du statut ... [more ▼]

Les études menées dans un certain nombre de juridictions européennes suggèrent qu’au stade du recours, les formations collégiales améliorent la qualité et l’équité du processus de détermination du statut de réfugié (DSR). [less ▲]

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See detailMaterial Cultures of Psychiatry
Ankele, Monika; Majerus, Benoît UL

Book published by transcript (2020)

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See detailSurveillance, indépendance et intégrité
Marx, Claude; Limpach, Marc; Majerus, Benoît UL

Book published by CSSF (2020)

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See detailEcrire l'histoire de la place financière d/au Luxembourg
Majerus, Benoît UL

in Marx, Claude; Limpach, Marc; Majerus, Benoît (Eds.) Surveillance, indépendance et intégrité (2020)

Detailed reference viewed: 121 (17 UL)
See detailDeutsch-französische soap opera an der Saar: die Anfänge des kommerziellen Rundfunks im Saarland (Tele-Saar und Europe no 1)
Fickers, Andreas UL

in Ziegler, Volker (Ed.) Das Europe 1 Sendezentrum im Saarland / Berus Überherrn (2020)

Detailed reference viewed: 43 (3 UL)