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See detailROLE OF TARGETED BIOCHAR-ACTIVATION IN THE REMOVAL OF MACRO- AND MICROPOLLUTANTS FROM SECONDARY EFFLUENT WASTEWATER
Brunhoferova, Hana UL; Venditti, Silvia UL; Hansen, Joachim UL

in Book of Abstracts 8th International Symposium On Wetland Pollutant Dynamics and Control (2019, January 30)

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See detailGeneralizations of single-peakedness
Devillet, Jimmy UL

Scientific Conference (2019, January 30)

We establish a surprising connection between a family of conservative semigroups, which includes the class of idempotent uninorms, and the concepts of single-peakedness and single-plateaudness, introduced ... [more ▼]

We establish a surprising connection between a family of conservative semigroups, which includes the class of idempotent uninorms, and the concepts of single-peakedness and single-plateaudness, introduced in social choice theory by D. Black. We also introduce a generalization of single-peakedness to partial orders of join-semilattices and show how it is related to the class of idempotent and commutative semigroups. Finally, we enumerate those orders when the corresponding semigroups are finite. [less ▲]

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See detailGP hyper-heuristic for the travelling salesman problem
Duflo, Gabriel UL; Kieffer, Emmanuel UL; Danoy, Grégoire UL et al

Scientific Conference (2019, January 29)

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See detail"A Colônia Luxemburguesa" – Trajectories made of Steel
Santana, Dominique UL

Scientific Conference (2019, January 25)

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See detailIslamic Finance and Economic Growth: New Evidence
Lehnert, Thorsten UL

Scientific Conference (2019, January 24)

While extensive work has shown that conventional banking development is generally conducive to economic growth, there are only a limited number of studies that investigate the impact of Islamic banking ... [more ▼]

While extensive work has shown that conventional banking development is generally conducive to economic growth, there are only a limited number of studies that investigate the impact of Islamic banking. Importantly, the literature on conventional banking claims that a reverse causality from economy performance to banking may exists, but existing studies on Islamic banking fail to address this potential endogeneity problem. This paper tackles this problem and explores the relationship between Islamic banking development and economic performance in a sample of 32 developed and developing countries based on data spanning the 2000 to 2016 period. The findings show that, although Islamic banks are considered small relative to the total size of the financial sector, Islamic banking is positively correlated with economic growth even after controlling for financial structure, macroeconomic factors and other variables. The outcome is robust across different econometric specifications like pooling OLS, fixed effects, panel data with over-identified GMM, and dynamic difference GMM. The results are confirmed on two different indicators of Islamic banking and hold for different time periods. [less ▲]

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See detailSC2Share: Smart Contract for Secure Car Sharing
Akash, Madhusudan; Symeonidis, Iraklis UL; A. Mustafa, Mustafa et al

in International Conference on Information Systems Security and Privacy (ICISSP) (2019, January 24)

This paper presents an efficient solution for the booking and payments functionality of a car sharing system that allows individuals to share their personal, underused cars in a completely decentralized ... [more ▼]

This paper presents an efficient solution for the booking and payments functionality of a car sharing system that allows individuals to share their personal, underused cars in a completely decentralized manner, annulling the need of an intermediary. Our solution, named SC2Share, leverages smart contracts and uses them to carry out secure and private car booking and payments. Our experiments on SC2Share on the Ethereum testnet guarantee high security and privacy to its users and confirm that our system is cost-efficient and ready for practical use. [less ▲]

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See detailDesign of a (yet another?) DevOps course
Capozucca, Alfredo UL; Guelfi, Nicolas UL; Ries, Benoît UL

in Bruel, Jean-Michel; Mazzara, Manuel; Meyer, Bertrand (Eds.) Software Engineering Aspects of Continuous Development and New Paradigms of Software Production and Deployment (2019, January 19)

DevOps have received marginal attention inside the higher education level curricula despite of its boom in the industrial sector. This paper presents the design of an academic master-level course aimed at ... [more ▼]

DevOps have received marginal attention inside the higher education level curricula despite of its boom in the industrial sector. This paper presents the design of an academic master-level course aimed at DevOps. The proposed design is based on earlier experiences in teaching DevOps-related topics. The specification of the course design is provided using the SWEBOK Guide and Bloom’s taxonomy to enhance the quality of the course design specification, and ease its assessment once delivered. [less ▲]

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See detailMagnetic and free-layer properties of MgO/(Co)FeB/MgO structure: Dependence on CoFeB composition
Bersweiler, Mathias UL

Scientific Conference (2019, January 17)

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See detailAssessing the impact of attacks on OPC-UA applications in the Industry 4.0 era
Polge, Julien UL; Robert, Jérémy UL; Le Traon, Yves UL

in 16th IEEE Annual Consumer Communications & Networking Conference (CCNC), Las Vegas, 11-14 January 2019 (2019, January 11)

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See detailComment assurer la qualité de l’évaluation par les pairs des propositions de communication dans le cadre d’un colloque scientifique ?
Milmeister, Marianne UL; Weis, Christiane UL; Dierendonck, Christophe UL

Scientific Conference (2019, January 10)

L’évaluation par les pairs joue un rôle important dans le monde universitaire et est souvent considérée comme le garant de la qualité scientifique. En même temps, les biais qui existent pour ce type ... [more ▼]

L’évaluation par les pairs joue un rôle important dans le monde universitaire et est souvent considérée comme le garant de la qualité scientifique. En même temps, les biais qui existent pour ce type d’évaluation sont multiples (partialité des évaluateurs, divergence de jugement entre évaluateurs, etc.) et bien documentés dans la littérature. Dans le cadre d’un colloque que nous avons organisé en 2018, nous avons mené une analyse exploratoire sur la base de données des évaluations réalisées par les pairs. Le but était d’avoir une idée de la qualité de l’évaluation par les pairs, de voir dans quelle mesure on retrouve les biais relevés par la littérature scientifique et, enfin, de définir des pistes qui pourraient contribuer à améliorer la qualité de ce processus. Dans le cas de notre colloque, l’évaluation par les pairs s’est faite via une plateforme en ligne. Chaque proposition de communication était évaluée de manière anonyme par deux personnes et sur base de neuf critères pour lesquels les évaluateurs pouvaient choisir entre quatre modalités d’appréciation : très faible, faible, bon, très bon. Ensuite, l’évaluateur devait donner sa recommandation pour la contribution analysée : acceptation, acceptation sous réserve d’ajustements ou refus. Une première analyse des données montre notamment qu’il existe des différences plus ou moins importantes tant entre les jugements des évaluateurs qu’entre les décisions d’un même évaluateur. Les résultats détaillés de nos analyses seront présentés lors du colloque et des pistes d’amélioration discutées. [less ▲]

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See detailEvaluation de l’engagement scolaire d’élèves en secondaire : quels facteurs sous-jacents sont en jeu ?
Kerger, Sylvie UL; Milmeister, Paul UL; Dierendonck, Christophe UL et al

in Actes du colloque of the 31ème coloque de l'ADMEE-Europe (2019, January 09)

Dans cette communication, nous allons, dans une perspective d’évitement du décrochage scolaire, nous pencher sur l’évaluation de l’engagement scolaire d’élèves en enseignement secondaire. Plus précisément ... [more ▼]

Dans cette communication, nous allons, dans une perspective d’évitement du décrochage scolaire, nous pencher sur l’évaluation de l’engagement scolaire d’élèves en enseignement secondaire. Plus précisément, nous tentons de mieux comprendre comment certains facteurs sous-jacents conditionnent ce dernier. En effet, l’engagement scolaire de l’élève peut être aussi bien lié à des facteurs individuels (sexe, catégorie socio-culturelle), qu’à des facteurs externes, tels que l’environnement scolaire. Nous posons les deux hypothèses suivantes : (1) Les élèves fréquentant les filières moins prestigieuses, ayant redoublé, ou issus d’un milieu social défavorable sont moins impliqués cognitivement (engagement cognitif) et ont plus souvent un comportement perturbateur (engagement comportemental). (2) Les perceptions de l’environnement scolaire et l’engagement scolaire des élèves sont associées positivement. Après avoir questionné 1473 élèves luxembourgeois, nous avons constaté que les facteurs individuels (le genre, position sociale des familles et la filière fréquentée) ne sont pas associés significativement à l’engagement cognitif des élèves, mais sont liés à l’engagement comportemental social (respect des règles). Les facteurs contextuels (perception de l'environnement scolaire, relation entre élèves et entre élèves et personnel, les climats éducatif, de justice, d’appartenance, de sécurité et la perception du bâtiment scolaire ainsi que l’orientation des buts centrés sur l’apprentissage ou sur la performance) sont liés aux deux variables dépendantes (engagement cognitif et engagement comportemental). Nos données confirment par ailleurs que l’orientation de l’école vers la performance est négativement liée à l’engagement des élèves. Nos deux hypothèses sont partiellement confirmées. Les deux variables dépendantes se distinguent en ce sens que l’engagement cognitif est lié quasi uniquement aux variables contextuelles, alors que les comportements perturbateurs sont aussi bien liés à des variables individuelles que contextuelles. Nos résultats montrent que l’évaluation de l’engagement scolaire peut fournir des informations aux enseignants permettant la mise en place de mesures pédagogiques agissant p.ex. sur les facteurs externes afin d’améliorer l’engagement scolaire des élèves. [less ▲]

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See detailMethodological Aspects of Software Engineering, Assurance, Quality, and Reliability Engineering (MAS/AQR) 2019 Welcome from the Minitrack Co-Chairs
Tenbergen, Bastian; Ries, Benoît UL

in Proceedings of the 52nd Hawaii International Conference on System Sciences (HICSS) (2019, January)

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See detailKomparatistik als Praxis der Freiheit (Hans-Jost Frey, Werner Hamacher)
Kohns, Oliver UL

Scientific Conference (2019, January)

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See detailA Markov Chain Monte Carlo Approach for Estimating Daily Activity Patterns
Scheffer, Ariane Hélène Marie UL; Bandiera, Claudia; Cantelmo, Guido et al

Poster (2019, January)

Determining the purpose of trips brings is a fundamental information to evaluate travel demand during the day and to predict longer-term impacts on the population’s travel behavior. The concept of tours ... [more ▼]

Determining the purpose of trips brings is a fundamental information to evaluate travel demand during the day and to predict longer-term impacts on the population’s travel behavior. The concept of tours is the most suited to consider the value of a daily scheduling of individuals and travel interdependencies. However, the meticulous care required for both collecting data of high quality and interpret results of advanced demand models are frequently considered as major drawbacks. The objective of this study is to incorporate into a standard trip-based model some inherent concepts of activity-based models in order to enhance the representation of travel behavior. The main focus of this work is to infer, employing utility theory, the trip purpose of a population, at a zonal level. Making use of Markov Chain Monte Carlo, a set of parameters is estimated in order to retrieve tour-based primitives of the demand. The main advantage of this methodology is the low requirements in terms of data, as no individual information are used, and the good interpretation of the model. Estimated parameters of the priors set a utility-based probability function for departure time, which allows to have a dynamic overview of the demand. In order to account for the tour consistency of travel decisions, a duration constraint is added to the model. The proposed model is applied to the region of Luxembourg city and the results show the potential of the methodologies for dividing an observed demand based on the activity at destination. [less ▲]

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See detailMixed hybrid and electric bus dynamic fleet management in urban networks: a model predictive control approach
Rinaldi, Marco UL; Picarelli, Erika; Laskaris, Georgios UL et al

Scientific Conference (2019, January)

Reducing pollutant emissions and promoting sustainable mobility solutions, including Public Transport, are increasingly becoming key objectives for policymakers worldwide. In order to jointly achieve ... [more ▼]

Reducing pollutant emissions and promoting sustainable mobility solutions, including Public Transport, are increasingly becoming key objectives for policymakers worldwide. In order to jointly achieve these goals, careful consideration should be put on the operational cost and management of PT services, in order to promote the adoption of green mobility solutions and advanced management techniques by operators. In this work we develop a dynamic fleet management approach for next generation Public Transportation systems, considering the instance of mixed electric / hybrid fleet. Our objective is that of investigating to what extent electrification, coupled with optimal fleet management, can yield operational cost savings for PT operators, explicitly considering real-time disturbances, including delays, service disruptions etc. We propose a Mixed Integer Linear Program to address the problem of optimal scheduling of a mixed fleet of electric and hybrid / non-electric buses, and employ it as predictor in a Model Predictive Control approach. Test results based upon a real-life scenario showcase how the proposed approach is indeed capable of yielding a sizable reduction in operational costs, even when considerable disturbances arise from the underlying system. [less ▲]

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See detailGender differences with regard to physical activity motivation and behavior in physical education and leisure time
Hutmacher, Djenna UL; Eckelt, Melanie UL; Bund, Andreas UL et al

Scientific Conference (2019, January)

Objectives: Given a widespread continuous decrease in children’s and adoles-cents’ physical activity (PA), the potential of physical education (PE) in promoting young people’s PA motivation and behavior ... [more ▼]

Objectives: Given a widespread continuous decrease in children’s and adoles-cents’ physical activity (PA), the potential of physical education (PE) in promoting young people’s PA motivation and behavior has become a key issue in research. Based on the self-determination theory (SDT) of Deci and Ryan (1985), the present study aimed to ex-amine gender differences with regard to PA motivation and behavior during PE and lei-sure time (LT). Previously, girls were found to be more self-determined than boys (Wil-liams & Deci, 1996), but showed lower self-reported PA and were meeting the PA guide-lines of the WHO to a lesser extent (Trost et al., 2002). Method: 244 students (139 girls and 125 boys) from 11 to 21 years participated in the study. PA motivation was assessed via a digital questionnaire containing the scales need support (Standage, Duda and Ntoumanis, 2005), basic needs (BPNES; Vlachopou-los, Ntoumanis & Smith, 2010), external and intrinsic motivation in PE (PLOC-R; Vla-chopoulos et al., 2011) and in LT (BREQ-II; Markland & Tobin, 2004). PA behavior was measured through a self-report questionnaire (Schmidt, Will, Henn, Reimers & Woll, 2016). Additionally, 76 students (38 girls and 38 boys) wore an accelerometer (ActiGraph GT3X-BT) over seven consecutive days to measure PA behavior objectively, too. Results: With regard to PA motivation, girls reported a lower fulfillment in the basic need of competence during PE and scored higher in the external motivation during PE and LT than boys. In contrast, boys reported higher rates of intrinsic motivation during PE and LT. Concerning PA behavior, boys showed higher PA than girls for self-reported and objectively measured PA in PE and LT. Independently of gender, higher levels of intrinsic motivation were associated with increased self-reported PA. Discussion: In conflict with previous findings, girls reported a lower intrinsic motiva-tion in PA than boys. As girls simultaneously show lower self-reported and objectively measured PA, future intervention programs should focus on strengthening the more in-ternally driven behavior of girls in order to foster regular PA. Key Reference: Deci, E.L. & Ran, R.M. (1985). Intrinsic motivation and self-determination in human behav-ior. New York: Plenum Press. [less ▲]

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See detailTowards Optimized Deployment of Electric Bus Systems Using Cooperative ITS
Laskaris, Georgios UL; Seredynski, Marcin; Viti, Francesco UL

Poster (2019, January)

In this paper we analyze the impact of using cooperative intelligent transportation systems (C-ITS) to manage electrical bus systems. A simulation-based study is presented where three control strategies ... [more ▼]

In this paper we analyze the impact of using cooperative intelligent transportation systems (C-ITS) to manage electrical bus systems. A simulation-based study is presented where three control strategies are used to regulate the operations of a line, namely bus holding, Green Light Optimal Dwell Time Adaptation (GLODTA) and Transit Signal Priority (TSP). The results show, using a realistic scenario of a major line in Luxembourg City, that buses are efficiently operated without necessarily providing additional priority to public transport, hence without negatively affecting the capacity of the private vehicles system. Benefits in terms of headway regulations, energy consumption and travel time variance reductions are quantified. [less ▲]

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See detailNovel Opportunities by Laser Welding of Dissimilar Materials
Schiry, Marc UL; Plapper, Peter UL

in Proceedings of International Conference on Competitive Manufacturing COMA'19 (2019, January)

The Laser Technology Competence Centre (LTCC) of the University of Luxembourg provides skills in joining material combinations, which are considered being non-weld able with traditional methods or at ... [more ▼]

The Laser Technology Competence Centre (LTCC) of the University of Luxembourg provides skills in joining material combinations, which are considered being non-weld able with traditional methods or at least challenging to join (e.g. Copper and Aluminium, Aluminium and Polyamide (PA), Titanium and PEEK, steel and tungsten hard alloy). Related accomplishments include minimal intermetallic compounds, convincing mechanical and superior electrical properties of the laser-welded specimen. With defined spatial and temporal modulation of the laser beam, an accurately defined temperature profile is created on the lower side of the upper material in the two dimensional directions, which enable joining of dissimilar materials in overlap configurations, despite challenging thermal properties. To weld butt-joint geometries with minimal heat affected volume, the temperature profiles were expanded in the third dimension, which can be achieved through controlled laser energy guidance. The scientific methods to accomplish these convincing results are explained, with selected industrial use cases ranging from automotive industry, energy storage, and medical implants. An outlook with unsolved challenges is intended to ignite discussions about upcoming research topics. [less ▲]

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See detailElucidation of influencing parameters of the laser butt welding process of dissimilar steel to tungsten alloy sheets
Schiry, Marc UL; Plapper, Peter UL

in Proceedings: International Conference on Competitive Manufacturing COMA'19 (2019, January)

Laser welding of steel - tungsten alloy joints requires deep understanding of the impact of the laser parameters on the welding process. Due to the dissimilar thermal and metallurgical properties of both ... [more ▼]

Laser welding of steel - tungsten alloy joints requires deep understanding of the impact of the laser parameters on the welding process. Due to the dissimilar thermal and metallurgical properties of both materials, a defined heat input and a precise temperature control in the weld interface is required. In the presented work, the influence of different laser parameter (e.g. laser power, focal position, scanner speed etc.) on the joint quality of laser welded steel / tungsten alloy butt-joints were investigated. By using statistical methods, the influencing process parameters were defined and optimized. It is shown that the horizontal focal position is the main parameter for the welding process in a butt-joint configuration. Additionally, manipulation of the heat input leads to modifications of the weld bead profile. By obtaining vertical seam boundaries in the sheet metal, a homogenous temperature profile at the interface of the materials to be welded was achieved. Due to the complete bonding and low amount of intermetallic phases, high shear strength accompanied with a low variance were the result. [less ▲]

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See detailAggregation of MQTT Topics over Integrated Satellite Terrestrial Networks
Palattella, Maria Rita UL; Soua, Ridha UL; Stemper, André UL et al

in ACM SIGMETRICS Performance Evaluation Review (2019, January)

The MQTT application protocol was originally designed for monitoring a oil pipeline through the desert by collecting sensor data via satellite link. Thus, by design MQTT is very suitable for data ... [more ▼]

The MQTT application protocol was originally designed for monitoring a oil pipeline through the desert by collecting sensor data via satellite link. Thus, by design MQTT is very suitable for data collection over integrated satellite-terrestrial networks. Leveraging on the MQTT Bridge functionality, in this work we propose a novel architecture with two MQTT Brokers located at the satellite terminal and the satellite gateway. By using the topic pattern option, supported by the bridge, a subscriber can request several topics within a single request. To reduce the amount of traffic ex-changed over the satellite return channel, we introduce in the architecture a new entity, namely MQTT message aggregation filter, which aggregates all the MQTT topics matching the topic pattern in the same response. [less ▲]

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See detailLa mesure des représentations et des pratiques parentales et leur mise en relation avec le développement des premières compétences numériques auprès d'élèves luxembourgeois du préscolaire.
Poncelet, Débora UL; Tinnes-Vigne, Mélanie; Dierendonck, Christophe UL

in Gremion, Christophe; Sylvestre, Emmanuel; Younes, Nathalie (Eds.) Actes du 31ème colloque scientifique international de l'Admée-Europe: Entre normalisation, contrôle et développement formatif. Evaluation sources de synergies ? (2019, January)

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See detailLateralization for faces in prereaders depends on the perceptual processing level: An EEG Fast Periodic Visual Stimulation study
Lochy, Aliette UL; Schiltz, Christine UL; Rossion, Bruno

Poster (2019, January)

The developmental origin of human adults’ right hemispheric lateralization to face stimuli is unclear, in particular because young infants’ right hemispheric advantage in face perception is no longer ... [more ▼]

The developmental origin of human adults’ right hemispheric lateralization to face stimuli is unclear, in particular because young infants’ right hemispheric advantage in face perception is no longer present in preschool children, before written language acquisition. Here we used fast periodic visual stimulation (FPVS) with scalp electrophysiology to test 52 preschool children (5 years old) at two levels of face processing (i.e., faces vs. objects, or discrimination between individual faces). While the contrast between faces and nonface objects elicits strictly bilateral occipital responses in children, discrimination of faces on the basis of identity in the same children is associated with a strong right hemispheric lateralization over the occipito-temporal cortex. Inversion of the face stimuli does not modulate right lateralization but significantly decreases the discrimination response. Furthermore, there is no relationship between right hemispheric lateralization in individual face discrimination and preschool levels of letter recognition. These observations suggest that right lateralization for face perception is essentially driven by the necessity to process faces at the level of identity. Overall, they also challenge the view that the adult right hemispheric lateralization for face perception emerges late and slowly during childhood due to increased competition with left lateralized posterior network for reading. [less ▲]

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See detailL'action extérieure de l'Union européenne à la lumière du Brexit
Neframi, Eleftheria UL

in ERPL/PEDP (2019), 31(1), 209-239

The withdrawal of the UK from the Union places the exiting Member State within the framework of the exernal action of the Union. The present contribution studies the two dimensions of the impact of Brexit ... [more ▼]

The withdrawal of the UK from the Union places the exiting Member State within the framework of the exernal action of the Union. The present contribution studies the two dimensions of the impact of Brexit on the external action of the European Union: on the one hand, in the relationships between the UK-third country and the EU; on the other hand, in the relationships between the EU and the third countries and in particular in what concerns the change in treaty relations. The principles that govern the Union’s external action are adapted to the specific process and to the unprecedented context of Brexit, without losing sight of the Union’s objective of affirming itself as an international credible player. A new dynamic of the external action of the Union could emerge from the opportunity that Brexit offers to reconsider the status of Member State and the Union’s objectives. [less ▲]

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See detailDark Patterns: Deception or Simply Bad Design?
Rossi, Arianna UL; Lenzini, Gabriele UL; Koenig, Vincent UL et al

Poster (2019)

Lately, researchers, journalists, and regulators are devoting attention to dark patterns, defined as "design choices that benefit an online service by coercing, steering or deceiving users into making ... [more ▼]

Lately, researchers, journalists, and regulators are devoting attention to dark patterns, defined as "design choices that benefit an online service by coercing, steering or deceiving users into making decisions that, if fully informed and capable of selecting alternatives, they would not make". Those patterns that have the purpose" or the "substantial effect of obscuring, subverting, or impairing user autonomy, decision-making, or choice" have also been qualified as dark. These definitions are dense: they contain concepts like coercion, nudging, and deception that all alone would deserve an entire work to be discussed. [less ▲]

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See detailMethodische Herausforderungen bei der Erfassung der interozeptiven Genauigkeit im Vorschulalter
Opdensteinen, K.; Schaan, L.; Pohl, A. et al

in Kirschbaum, C. (Ed.) 45. Jahrestagung Psychologie und Gehirn - Abstractband (2019)

Im Vorschulalter entwickeln sich zentrale Fähigkeiten in Kognition, Sprache und Emotion. Dennoch ist wenig über das bewusste Erleben innerer Körperempfindungen bei Vorschulkindern bekannt, da es an ... [more ▼]

Im Vorschulalter entwickeln sich zentrale Fähigkeiten in Kognition, Sprache und Emotion. Dennoch ist wenig über das bewusste Erleben innerer Körperempfindungen bei Vorschulkindern bekannt, da es an altersangepassten Paradigmen zu Erfassung der interozeptiven Genauigkeit (IG) mangelt. Das Jumping Jack Paradigma (JJP) (Schaan et al., 2019) ist das erste explizite IG-Paradigma für Vorschulkinder, das eine Veränderung des Herzschlages durch eine körperliche Übung in die Erfassung integriert. Aufgrund methodischer Herausforderungen wurde das JJP modifiziert und an einer Stichprobe von 40 Kindern (22 Jungen, 4–6 Jahre) erprobt. Die Wahrnehmung des Herzschlags wurde zu sechs Zeitpunkten (3 Ratings in Ruhephasen und 3 nach Hampelmannsprüngen mit aufsteigender Sprungdauer je 15, 20 und 25s) auf einer 5-stufigen Ratingskala erfasst. Die Berechnung des IG-Wertes erfolgte durch Korrelationen zwischen der selbstberichteten und der objektiv-aufgezeichneten Herzrate. Die objektiv-gemessene Herzrate erhöhte sich in Abhängigkeit der Sprungdauer (F(2;78)=9.19, p<.001; pη²=0.19), während die selbstberichtete Herzrate nach dem zweiten Durchgang am höchsten eingeschätzt wurde (F(2;78)=9.37, p<.001; pη²=.19). Vorschulkinder variierten in ihrer IG (M=0.07, SD=0.37, Range:-0.74–0.88). Es zeigten sich keine signifikanten Unterschiede zwischen Mädchen und Jungen hinsichtlich der IG. Ältere Jungen zeigten eine höhere IG, verglichen mit jüngeren Jungen (χ²(2)=5.61, p=.05), während bei Mädchen kein Alterseffekt auftrat. Anhand des modifizierten JJP konnte gezeigt werden, dass einige Kinder bereits im Vorschulalter in der Lage sind, Veränderungen körpereigener Empfindungen wahrzunehmen. Die Induktion körperlichen Arousals scheint die Wahrnehmung des Herzschlages mit zunehmendem Alter vor allem bei Jungen zu erleichtern, da ältere Jungen sensitiver waren. Die Ergebnisse lassen vermuten, dass es im Vorschulalter Geschlechtsunterschiede bei der Körperwahrnehmung geben könnte. [less ▲]

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See detailAsphalion: Trustworthy Shielding Against Byzantine Faults
Vukotic, Ivana UL; Rahli, Vincent UL; Verissimo, Paulo UL

in Vukotic, Ivana; Rahli, Vincent; Verissimo, Paulo (Eds.) Asphalion: Trustworthy Shielding Against Byzantine Faults (2019)

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See detailAnimal autobiographique et poétique de l'évolution. Lecture zoopoétique de l'oeuvre de Jean Portante
Thiltges, Sébastian UL

in Glesener, Jeanne; Raus, Tonia (Eds.) Jean Portante. Le travail de l'écriture ou la mémoire à l'oeuvre (2019)

La clé de voûte du roman Mrs Haroy ou La Mémoire de la baleine (Echternach : Phi, 1993 ; rééd. Bordeaux : Le Castor Astral, 1999) est le souvenir du cadavre embaumé d’une baleine abattue au large de l’île ... [more ▼]

La clé de voûte du roman Mrs Haroy ou La Mémoire de la baleine (Echternach : Phi, 1993 ; rééd. Bordeaux : Le Castor Astral, 1999) est le souvenir du cadavre embaumé d’une baleine abattue au large de l’île de Haroy en Norvège, exposé sur un wagon ferroviaire à la gare de Luxembourg. Ce spectacle représente non seulement une expérience fondatrice pour le narrateur, mais tisse un réseau métaphorique reliant l’écrivain, l’étranger et l’animal dans leur passage de frontière et dans leur exil. L’image a été abondamment commentée et sa portée littéraire, linguistique et socioculturelle au Luxembourg fut prodigieuse . Cependant, la critique demeure étonnamment silencieuse sur la genèse de la métaphore : puisant aussi bien dans des textes scientifiques et des récits de voyages que dans des œuvres littéraires, le romancier passe outre les traditionnelles frontières génériques entre description naturaliste et imaginaire culturel. De même, si l’image poétique et poétologique du poumon a fait l’objet d’études approfondies de l’œuvre de Jean Portante, incluant les recueils de poésie L’Étrange langue (Châtelineau : Le Taillis Pré, 2002) et Le Travail du poumon (Bordeaux : Le Castor Astral, 2007), la lecture d’un chapitre de Mrs Haroy, où les millions d’années de l’évolution des cétacés sont au cœur de l’élaboration d’une poétique romanesque reliant les temporalités du récit intime, du contexte sociohistorique d’une migration et des transformations des formes de vie, permettra de porter un regard nouveau sur l’invention formelle qui sous-tend l’image. Dans le cadre des études éco- et zoocritiques (environmental et animal studies), nous souhaitons refonder le motif de la baleine, que nous ne lirons pas uniquement en tant que métaphore, nécessairement anthropocentrique et réduisant la nature au rôle de palimpseste sur lequel viennent s’écrire les histoires humaines. L’intérêt écologique du roman de Jean Portante ne réside pas simplement dans la présence de l’animal prototypique de la défense des animaux, dans les descriptions des atrocités réelles ou fictionnelles que subissent les cétacés ni dans l’identification du narrateur avec le non-humain. En effet, pour Jean-François Lyotard, l’art et la littérature sont des discours « écologiques » parce qu’ils font parler des voix mises à l’écart, et Jacques Derrida de poursuivre, dans L’Animal que donc je suis , la déconstruction des oppositions heuristiques de l’Occident à travers l’expression poétique d’une vision écocentrée de soi-même dans la communauté du vivant. [less ▲]

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See detailDas Verhältnis zwischen Hochschule und Wissenschaft in Deutschland: Expansion – Produktion – Kooperation
Dusdal, Jennifer UL; Oberg, Achim; Powell, Justin J W UL

in Burzan, Nicole (Ed.) Komplexe Dynamiken globaler und lokaler Entwicklungen: Der Verhandlungsband des 39. Kongresses der Deutschen Gesellschaft für Soziologie vom 24.-28. September 2018 an der Georg-August-Universität Göttingen (2019)

Dieser Beitrag rekonstruiert den Einfluss der Hochschulentwicklung und der wissenschaftlichen Kapazitätsbildung auf die wissenschaftliche Wissensproduktion in Deutschland, einem der weltweit stärksten ... [more ▼]

Dieser Beitrag rekonstruiert den Einfluss der Hochschulentwicklung und der wissenschaftlichen Kapazitätsbildung auf die wissenschaftliche Wissensproduktion in Deutschland, einem der weltweit stärksten Produzenten wissenschaftlichen Wissen seit 1900. Folgende Forschungsfragen sollen beantwortet werden: Wie haben institutionalisierte Strukturen, und darin verschiedene Organisationsformen, die langfristige Entwicklung wissenschaftlicher Produktivität beeinflusst und verändert? In welchen organisationalen Netzwerken entwickelt sich aktuell die Wissenschaft weiter? Die Annäherung an den Forschungsgegenstand erfolgt auf der Makroebene anhand von Indikatoren zur Erfassung der globalen Expansion, Kooperation und Produktion der Wissenschaft. Vor dem Hintergrund dieses Untersuchungsrahmens wird dann auf der Mesoebene das Zusammenspiel von Organisationsformen in Deutschland mittels netzwerkanalytischer Verfahren betrachtet. Ziel des Beitrags ist, die Orte und institutionellen Settings wissenschaftlicher Produktion zu identifizieren und anhand ihrer Aufgaben und Ziele voneinander abzugrenzen sowie ihre Beziehungen zueinander herauszuarbeiten. Als theoretische Basis werden neo-institutionalistische Ansätze zur Untersuchung und Erklärung der Expansion des Hochschulwesens und der Wissenschaft und zur Analyse von organisationalen Netzwerken herangezogen. Grundlage der empirischen Analyse bilden Publikationen in peer-reviewed Zeitschriften als Kennzeichen wissenschaftlicher Produktion. [less ▲]

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See detailDiscrete-Phase Sequence Design for Coexistence of MIMO Radar and MIMO Communications
Alaee-Kerahroodi, Mohammad UL; Mishra, Kumar Vijay; Shankar, M. R. Bhavani et al

in 2019 IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) (2019)

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See detailOn the Evolution of Mobile App Complexity
Gao, Jun UL; Li, ; Bissyande, Tegawendé François D Assise UL et al

in Proceedings of 2019 24th International Conference on Engineering of Complex Computer Systems (2019)

Android developers are known to frequently update their apps for fixing bugs and addressing vulnerabilities, but more commonly for introducing new features. This process leads a trail in the ecosystem ... [more ▼]

Android developers are known to frequently update their apps for fixing bugs and addressing vulnerabilities, but more commonly for introducing new features. This process leads a trail in the ecosystem with multiple successive app versions which record historical evolutions of a variety of apps. While the literature includes various works related to such evolutions, little attention has been paid to the research question on how quality evolves, in particular with regards to maintainability and code complexity. In this work, we fill this gap by presenting a largescale empirical study: we leverage the AndroZoo dataset to obtain a significant number of app lineages (i.e., successive releases of the same Android apps), and rely on six well-established, maintainability-related complexity metrics commonly accepted in the literature on app quality, maintainability etc. Our empirical investigation eventually reveals that, overall, while Android apps become bigger in terms of code size as time goes by, the apps themselves appear to be increasingly maintainable and thus decreasingly complex [less ▲]

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See detailMesa Redonda: 2018 - Año de elecciones: Brasil, Colombia y México/ 2018
Harnoncourt, Julia UL; Molden, Berthold; Echivarria, Josefina

Scientific Conference (2019)

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See detailLegal Design Patterns: Towards A New Language for Legal Information Design
Rossi, Arianna UL; Ducato, Rossana; Haapio, Helena et al

in Schweighofer, Erich; Kummer, Franz; Saarenpää, Ahti (Eds.) 22nd International Legal Infomatics Symposium IRIS 2019 (2019)

Patterns are a central tool in legal design. They are conceptual schemes or entities describing solutions to a recurring legal problem, helping to make contracts, disclosures and policies accessible to ... [more ▼]

Patterns are a central tool in legal design. They are conceptual schemes or entities describing solutions to a recurring legal problem, helping to make contracts, disclosures and policies accessible to users and easier to prepare. In this paper, we take stock of existing legal design patterns and pattern libraries and present the idea of a legal design pattern language intended to lead to documenting and sharing good practices across disciplines and to more actionable pattern libraries. [less ▲]

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See detailLink budget analysis for satellite-based narrowband IoT systems
Kodheli, Oltjon UL; Maturo, Nicola UL; Andrenacci, Stefano et al

Scientific Conference (2019)

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See detailInfluence of Macro-Substrate Composition in Wastewater on Micropollutant Removal
Christen, Anne UL; Gallé, Tom; Köhler, Christian et al

in the mobile app "MICROPOL 2019" (2019)

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See detailATTITUDES TOWARD OWN AGING AND PERSONALITY IN LATER LIFE: EXAMINATION OF BIDIRECTIONALITY OVER 20 YEARS
Kornadt, Anna Elena UL; Siebert, Jelena S.; Wahl, Hans-Werner

in Innovation in Aging (2019), 3(Supplement_1), 385-385

Big Five personality traits are assumed to be linked with attitudes toward own aging (ATOA). Both constructs have central importance for the aging process, it is thus important to comprehensively address ... [more ▼]

Big Five personality traits are assumed to be linked with attitudes toward own aging (ATOA). Both constructs have central importance for the aging process, it is thus important to comprehensively address their mutual connection over time. We used data from the ILSE study, a longitudinal study with four measurement occasions, spanning 20 years and including two participant cohorts (n = 501; born 1950-52 and n = 500; born 1930-32). Dual latent change score models showed that personality was longitudinally related to change in ATOA: Lower Neuroticism, higher Conscientiousness, and higher Openness predicted more positive attitudes; the effect for Extraversion varied by time. Furthermore, the role of personality seems to be confined to certain sensitive periods in midlife and early old age. ATOA had only marginal longitudinal impact on personality. Our results shed light on the developmental co-dynamics of personality and subjective perceptions of aging across the second half of life. [less ▲]

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See detailEin binaurales Hörspiel über die Geschichte der akustischen 3D-Aufnahme
Krebs, Stefan UL

Scientific Conference (2019)

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See detailRobotic trajectory tracking: Bio-inspired position and torque control
Klecker, Sophie UL; Hichri, Bassem UL; Plapper, Peter UL

in Procedia CIRP (2019)

As far as complex contact-based manufacturing tasks are concerned, humans outperform machines. Indeed, conventionally controlled robotic manipulators are limited to basic applications in close to ideal ... [more ▼]

As far as complex contact-based manufacturing tasks are concerned, humans outperform machines. Indeed, conventionally controlled robotic manipulators are limited to basic applications in close to ideal circumstances. However, tedious work in hazardous environments, make some tasks unsuitable for humans. Therefore, the interest in expanding the application-areas of robots arose. This paper employs a bottom-up approach to develop robust and adaptive learning algorithms for trajectory tracking: position and torque control in the presence of uncertainties and switching constraints. The robotic manipulators mimicking the human behavior based on bio-inspired algorithms, take advantage of their know-how. Simulations and experiments validate the concept-performance. [less ▲]

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See detailOn Kilian's Randomization of Multilinear Map Encodings
Coron, Jean-Sébastien UL; Pereira, Vitor UL

in Coron, Jean-Sébastien; Pereira, Vitor (Eds.) On Kilian's Randomization of Multilinear Map Encodings (2019)

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See detailSimple Conditionals with Constrained Right Weakening
Casini, Giovanni UL; Meyer, Thomas; Varzinczak, Ivan

in Proceedings of the 28th International Joint Conference on Artificial Intelligence (IJCAI 2019) (2019)

In this paper we introduce and investigate a very basic semantics for conditionals that can be used to define a broad class of conditional reasoning systems. We show that it encompasses the most popular ... [more ▼]

In this paper we introduce and investigate a very basic semantics for conditionals that can be used to define a broad class of conditional reasoning systems. We show that it encompasses the most popular kinds of conditional reasoning developed in logic-based KR. It turns out that the semantics we propose is appropriate for a structural analysis of those conditionals that do not satisfy the property of Right Weakening. We show that it can be used for the further development of an analysis of the notion of relevance in conditional reasoning. [less ▲]

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See detailPrivacy and Linkability of Mining in Zcash
Biryukov, Alex UL; Feher, Daniel UL

in 2019 IEEE Conference on Communications and Network Security (CNS) (2019)

With the growth in popularity for cryptocurrencies the need for privacy preserving blockchains is growing as well. Zcash is such a blockchain, providing transaction privacy through zero-knowledge proofs ... [more ▼]

With the growth in popularity for cryptocurrencies the need for privacy preserving blockchains is growing as well. Zcash is such a blockchain, providing transaction privacy through zero-knowledge proofs. In this paper we analyze transaction linkability in Zcash based on the currency minting transactions (mining). Using predictable usage patterns and clustering heuristics on mining transactions an attacker can link to publicly visible addresses over 84% of the volume of the transactions that use a ZK-proof. Since majority of Zcash transactions are not yet using ZK-proofs, we show that overall 95.5% of the total number of Zcash transactions are potentially linkable to public addresses by just observing the mining activity. [less ▲]

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See detailA Decade of Featured Transition Systems
Cordy, Maxime UL; Devroey, Xavier; Legay, Axel et al

in From Software Engineering to Formal Methods and Tools, and Back - Essays Dedicated to Stefania Gnesi on the Occasion of Her 65th Birthday (2019)

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See detailA Proposal for Security Assessment of Trustzone-M based Software
Iannillo, Antonio Ken UL; State, Radu UL

in 2019 IEEE 30th International Symposium on Software Reliability Engineering (ISSRE) (2019)

With the advent of the Internet of Things (IoT) paradigm, computing and networking capabilities are extending to devices that are not considered as computers, enabling them to interact with the physical ... [more ▼]

With the advent of the Internet of Things (IoT) paradigm, computing and networking capabilities are extending to devices that are not considered as computers, enabling them to interact with the physical world or other software entities with minimal or no human input. This fast abstract proposes a methodology for the security assessment of software based on TrustZone-M, the ARM hardware security extension for microcontrollers. The methodology consists of the exploitation of a verification and validation framework to automatically test TrustZone-M based software. [less ▲]

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See detailPhase field modeling of crack initiation and propagation under complex loading
Nguyen, Thanh Tung UL; Yvonnet, Julien; Waldmann, Danièle UL

in International Conference on Computational Modeling of Fracture and Failure of Materials and Structures (2019)

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See detailCardiac cycle phase affect auditory-evoked potentials in response to acoustic startle stimuli, but not perceived intensity ratings
Bernard, Sam UL; Münch, E. E.; Hansen, G. et al

in Kirschbaum, C. (Ed.) 45. Jahrestagung Psychologie und Gehirn - Abstractband (2019)

Startle stimuli presented in the early cardiac cycle phase elicit lower responses than stimuli presented in the late cardiac cycle phase. This effect, named ‚Cardiac modulation of startle (CMS)‘, was ... [more ▼]

Startle stimuli presented in the early cardiac cycle phase elicit lower responses than stimuli presented in the late cardiac cycle phase. This effect, named ‚Cardiac modulation of startle (CMS)‘, was proposed to reflect baro-afferent signal processing in the central nervous system. It is yet unclear, however, whether the CMS is due to a general sensory attenuation effect by baro-afferent signal transmission or to a specific neural pathway that selectively attenuates startle stimulus processing, but may eventually enhance other processes. The aim of the present study was, therefore, to address this issue. In this present study 23 female participants were presented acoustic stimuli of varying intensities (95, 100, and 105 dBA) during early (R-wave + 230 ms) and late (R+ 530 ms) cardiac cycle phase. Startle responses (EMG of the M. Orbicularis Oculi), auditory-evoked potentials (AEPs), and perceived intensity ratings of all stimuli were assessed. Higher startle stimulus intensities evoked higher perceived intensity ratings, stronger EMG startle responses, and higher N1, P2, and P3 AEPs. Startle stimuli in the early cardiac cycle phase elicited lower startle responses, and a positive shift of the N1 and P3 components as compared to the late cardiac cycle phase. Intensity ratings were unaffected by the cardiac cycle phases. The present AEP pattern associated with CMS appears to be unique across all startle modulation paradigms, supporting a more specific neural pathway, rather than a general sensory attenuation. [less ▲]

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See detailEmotion regulation and sexual health: an online study protocol
Fischer, Vinicius; Andersson, gerhard; Billieux, Joël et al

in International Journal of Sexual Health (2019), 31

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See detailScalable control of asynchronous Boolean networks
Su, Cui; Paul, Soumya UL; Pang, Jun UL

in Proceedings of 17th International Conference on Computational Methods in Systems Biology (CMSB'19) (2019)

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See detailErhöhte Reaktivität Herzschlag-evozierter Potenziale während der Aufmerksamkeits- fokussierung auf den eigenen Herzschlag und erhöhte kardiovaskuläre Aktivität bei Personen mit hoher somatoformer Symptombelastung
Schulz, André UL; Rost, S.; Dierolf, Angelika UL et al

in Kirschbaum, C. (Ed.) 45. Jahrestagung Psychologie und Gehirn - Abstractband (2019)

Die psychobiologischen Mechanismen der Entstehung körperlicher Symptome bei somatoformen Störungen sind weitgehend unklar. Im Perception-Filter-Modell wird postuliert, dass (1.) verstärkte ... [more ▼]

Die psychobiologischen Mechanismen der Entstehung körperlicher Symptome bei somatoformen Störungen sind weitgehend unklar. Im Perception-Filter-Modell wird postuliert, dass (1.) verstärkte Signalübermittlung von Körperorganen und (2.) verringerte Filterfunktion im ZNS zu (3.) verstärkter Wahrnehmung von Symptomen führt. Bislang existiert jedoch keine Evidenz, die diesen Zusammenhang an einer von somatoformen Symptomen belasteten Population unterstützt. Um diesen Sachverhalt aufzudecken, wurden zunächst 486 Personen aus der Allgemeinbevölkerung anhand einer Online- Version des Screenings für Somatoforme Störungen (SOMS-2) anhand des oberen und unteren Centils in Personen mit hoher (HSB) und niedriger somatoformer Symptombelastung (NSB) geteilt. Jeweils 29 NSB- (21 Frauen; 26,0 J.) und HSBPersonen (27 Frauen; 28,4 J.) wurden im Labor anhand (1.) verstärkter Körpersignale hinsichtlich kardiovaskulärer Aktivität und Cortisol-Aufwachreaktion, sowie (2.) Filterfunktionen im ZNS hinsichtlich Herzschlag-evozierter Potentiale (HEPs) während der Durchführung eines Herzschlagwahrnehmungstests und während Ruhe untersucht. HEPs reflektieren die Repräsentation kardio-afferenter Signale im ZNS. Die HSB-Gruppe zeigte eine höhere Ruhe-Herzrate (72,7 vs. 66,8 bpm) und eine geringere Herzratenvariabilität (RMSSD: 36,8 vs. 52,5 ms) als die LSB-Gruppe. Außerdem zeigten die HSB-Personen bei der Aufmerksamkeitsfokussierung auf den eigenen Herzschlag eine höhere Reaktivität der HEP-Amplitude als die LSB-Personen. Es gab keine Gruppenunterschiede hinsichtlich der Cortisol-Aufwachreaktion. Die Ergebnisse belegen sowohl (1.) die verstärkte Signalübermittlung von Körperorganen, als auch (2.) verringerte Filterfunktionen bei Personen mit hoher somatoformer Symptombelastung. Dies spricht für die Gültigkeit des Perception-Filter-Modells. Die erhöhte HEP-Reaktivität bezüglich der Aufmerksamkeitsfokussierung auf Körperprozesse könnte einen Biomarker für Personen mit hohem Risiko für die Entwicklung von somatoformen Störungen darstellen. [less ▲]

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See detailGeneration of Patients-as-Partner Items Through a Qualitative Data Analysis : Initial Item Reduction
Odero, Angela UL; Baumann, Michèle UL

in Conference Handbook EHPS : Individuals and Professionals Cooperation to health (2019)

Health psychology aspires to find ways for evaluating the Patient as a Partner. The Montréal model, proposes a verbal and conceptual interpretation. Developed by a University of Montréal research team ... [more ▼]

Health psychology aspires to find ways for evaluating the Patient as a Partner. The Montréal model, proposes a verbal and conceptual interpretation. Developed by a University of Montréal research team, this approach advances that patients should play an active role in the healthcare process. Quantitative assessments employing a methodological framework involving a qualitative approach do not exist. Our study aimed at analyzing a procedure for generating patient as a partner related items and to elaborate their classification. Five semi-structured focus groups with 20 chronic disease patients and 15 professionals (doctors, nurses) were conducted. A qualitative analysis, combining inductive (data abstraction was conducted from specific to general), and deductive (guided by a predefined protocol) methods was employed to create a flexible framework of analysis. A thematic categorical content analysis of the transcriptions was conducted. Verbatim were extracted and classified into categories. Cluster analysis using Sorensen’s coeffient was performed with the software N’Vivo 12. Sorensen’s similarity analysis helped to structure a conceptual framework for the assessment of patient as partner at the doctor patient interaction level. The content of each category was verfied through consensus by multidisciplinary experts, who formulated items to capture the overall patient as partner experience. Our list of items constituted fundamental dimensions of partnership, constituting a first classification and a basis for the development of a routine clinical assessment tool. This process should guarantee that the items are acceptable, comprehensive and relevant (reflecting the lived experience of the participants) ensuring a validity of the future questionnaire. [less ▲]

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See detailThe Importance of Accounting for Real-World Labelling When Predicting Software Vulnerabilities
Jimenez, Matthieu; Rwemalika, Renaud UL; Papadakis, Mike UL et al

in Joint European Software Engineering Conference and Symposium on the Foundations of Software Engineering (ESEC/FSE) (2019)

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See detailAn Experimental Analysis of Fraud Detection Methods in Enterprise Telecommunication Data using Unsupervised Outlier Ensembles
Kaiafas, Georgios UL; Hammerschmidt, Christian UL; Lagraa, Sofiane UL et al

in Kaiafas, Georgios; Hammerschmidt, Christian; State, Radu (Eds.) 16th IFIP/IEEE Symposium on Integrated Network and Service Management (IM 2019) (2019)

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See detailAnalyzing moment correlations within clusters of magnetic nanoparticles
Bender, Philipp Florian UL

Scientific Conference (2019)

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See detailRLS Waveform Adaptation for Massive MIMO Systems with Nonlinear Front-End
Bereyhi, A.; Asaad, S.; Müller, R.R et al

in IEEE International Workshop on Signal Processing Advances in Wireless Communication (2019)

To keep massive MIMO systems cost-efficient, power amplifiers with rather small output dynamic ranges are employed. They may distort the transmit signal and degrade the performance. This paper proposes a ... [more ▼]

To keep massive MIMO systems cost-efficient, power amplifiers with rather small output dynamic ranges are employed. They may distort the transmit signal and degrade the performance. This paper proposes a distortion aware precoding scheme for realistic scenarios in which RF chains have nonlinear characteristics. The proposed scheme utilizes the method of regularized least-squares (RLS) to jointly compensate the channel impacts and the distortion imposed by the RF chains. To construct the designed transmit waveform with low computational complexity, an iterative algorithm based on approximate message passing is developed. This algorithm is shown to track the achievable average signal distortion of the proposed scheme tightly, even for practical system dimensions. The results demonstrate considerable enhancement compared to the state of the art. Index Terms-Precoding, nonlinear power amplifiers, approximate message passing, regularized least-squares, massive MIMO. [less ▲]

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See detailUniform Sampling of SAT Solutions for Configurable Systems: Are We There Yet?
Plazar, Quentin; Acher, Mathieu; Perrouin, Gilless et al

in 12th IEEE Conference on Software Testing, Validation and Verification, ICST 2019, Xi'an, China, April 22-27, 2019 (2019)

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See detailScalable Gaussian Process Inference with Finite-data Mean and Variance Guarantees
Huggins, Jonathan; Campbell, Trevor; Kasprzak, Mikolaj UL et al

in Proceedings of the 22nd International Conference on Artificial Intelligence and Statistics (AISTATS) 2019 (2019)

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See detailDo interoceptive deficits contribute to decision-making problems in academic procrastination
Breden, I.-H.; Dincher, K.; Pereira Pedrosa, R. et al

in Kirschbaum, C. (Ed.) 45. Jahrestagung Psychologie und Gehirn - Abstractband (2019)

Interoception plays an important role for intuitive decision-making. One possible explanation is that the perception of somatic markers when simulating the outcome of different action alternatives guides ... [more ▼]

Interoception plays an important role for intuitive decision-making. One possible explanation is that the perception of somatic markers when simulating the outcome of different action alternatives guides the selection for the potentially best option. In the present study, we aimed at investigating if chronically procrastinating individuals show interoceptive deficits, which may explain poor decision-making performance. We tested 19 chronic procrastinators (14 females) and 22 nonprocrastinating control individuals (14 females), recruited from students and staff of the University of Luxembourg. This study consisted of a laboratory experiment including questionnaires assessing procrastinating behavior and two separate behavioral paradigms. Using the Schandry Heartbeat Perception Task as an indicator for interoceptive accuracy and the Iowa Gambling Task (IGT) for the assessment of decision-making performance. Questionnaire data confirmed significantly higher procrastination scores in that group. While male participants showed a significantly higher interoceptive accuracy score than their female counterparts, procrastinators and non-procrastinators did not differ significantly in interoception. Furthermore, no differences in the choice of deck selections were found between procrastinators and non-procrastinators. Interoceptive accuracy was unrelated to decision-making performance. No significant group differences were found for either analysis regarding the performance development as well as sex differences in the IGT. We observed a learning effect in the IGT, with choices for profitable decks increasing over time and poor choices declining. The current study did neither support reduced decision-making problems, nor interoceptive deficits in procrastination. Future studies should incorporate interoceptive indicators of other organ systems and self-report measures to elucidate possible alterations in procrastination. [less ▲]

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See detailGraphical Models for Security - 6th International Workshop, Revised Papers
Albanese, Massimiliano; Horne, Ross James UL; Probst, Christian W.

Scientific Conference (2019)

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See detailSequential reprogramming of Boolean networks made practical
Mandon, Hugues; Su, Cui; Haar, Stefan et al

in Proceedings of 17th International Conference on Computational Methods in Systems Biology (CMSB'19) (2019)

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See detailA Controller Architecture for Anomaly Detection, Root Cause Analysis and Self-Adaptation for Cluster Architectures
Samir, Areeg UL; Pahl, Claus

in Samir, Areeg (Ed.) The Eleventh International Conference on Adaptive and Self-Adaptive Systems and Applications (2019)

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See detailSystematic monitoring by passive samplers on WWTPs provides new insights in micropollutant elimination, related process parameters and degradation pathways
Köhler, Christian; Gallé, Tom; Pittois, Denis et al

Scientific Conference (2019)

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See detailCryptanalysis of SKINNY in the Framework of the SKINNY 2018--2019 Cryptanalysis Competition
Derbez, Patrick UL; Lallemand, Virginie; Udovenko, Aleksei UL

in Patterson, Kenneth G.; Stebila, Douglas (Eds.) Selected Areas in Cryptography -- SAC 2019 (2019)

In April 2018, Beierle et al. launched the 3rd SKINNY cryptanalysis competition, a contest that aimed at motivating the analysis of their recent tweakable block cipher SKINNY . In contrary to the previous ... [more ▼]

In April 2018, Beierle et al. launched the 3rd SKINNY cryptanalysis competition, a contest that aimed at motivating the analysis of their recent tweakable block cipher SKINNY . In contrary to the previous editions, the focus was made on practical attacks: contestants were asked to recover a 128-bit secret key from a given set of 2^20 plaintext blocks. The suggested SKINNY instances are 4- to 20-round reduced variants of SKINNY-64-128 and SKINNY-128-128. In this paper, we explain how to solve the challenges for 10-round SKINNY-128-128 and for 12-round SKINNY-64-128 in time equivalent to roughly 2^52 simple operations. Both techniques benefit from the highly biased sets of messages that are provided and that actually correspond to the encryption of various books in ECB mode. [less ▲]

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See detailAnalyzing the Context of Bug-Fixing Changes in the OpenStack Cloud Computing Platform
Cotroneo, Domenico; De Simone, Luigi; Iannillo, Antonio Ken UL et al

in 2019 IEEE 30th International Symposium on Software Reliability Engineering (ISSRE) (2019)

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See detailHerzschlag-evozierte Potenziale bei Bulimia nervosa
Lutz, Annika UL; Van Dyck, Zoé UL; Schulz, André UL et al

Poster (2019)

Die ursprüngliche Annahme, dass Essstörungspatient/innen unter einem umfassenden Defizit der interozeptiven Wahrnehmung leiden, wird inzwischen differenzierter betrachtet. Unterschiedliche Befunde ergeben ... [more ▼]

Die ursprüngliche Annahme, dass Essstörungspatient/innen unter einem umfassenden Defizit der interozeptiven Wahrnehmung leiden, wird inzwischen differenzierter betrachtet. Unterschiedliche Befunde ergeben sich je nach betrachtetem Organsystem (Herz, Magen), Verarbeitungsebene (neuronal, Selbstbericht) und Diagnose. Die bisherige Befundlage ist jedoch unübersichtlich und widersprüchlich. Für Bulimia nervosa (BN) wurde sowohl reduzierte, als auch unveränderte Herzschlagwahrnehmung berichtet. Mit dem vorliegenden Beitrag steuern wir weitere Ergebnisse zur Herzschlagwahrnehmung bei und ergänzen diese um einen physiologischen Indikator der kortikalen Verarbeitung kardio-afferenter Signale (Herzschlag-evozierte Potenziale, HEPs). Es wurden 22 Frauen mit akuter oder teilremittierter BN (BMI 23,94±3,61; Alter 31,86±11,20) und 22 gesunde Frauen untersucht (BMI 24,24±3,37; Alter 31,00±10,15). Die Stichproben wurden nach Alter und BMI parallelisiert. Die Teilnehmerinnen führten eine Herzschlagwahrnehmungsaufgabe nach Schandry durch, während ein 64-Kanal-EEG aufgezeichnet wurde. HEPs wurden als mittlere EEG-Amplitude von 455ms bis 595ms nach der R-Zacke berechnet. Die Ergebnisse zeigen keine signifikanten Gruppenunterschiede in Herzschlagwahrnehmung, HEPs und Herzrate. Dies bestätigt vorherige Befunde einer intakten Herzschlagwahrnehmung bei BN. Zusätzlich können wir von einer intakten kortikalen Verarbeitung kardio-afferenter Reize ausgehen. Die Wahrnehmung des Herzschlags ist insbesondere für die Verarbeitung und Regulation von Emotionen relevant. Auf Basis der vorliegenden und früheren Befunde ist davon auszugehen, dass defizitäre Emotionsregulation bei BN nicht auf veränderte Herzschlagwahrnehmung zurückzuführen ist. [less ▲]

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See detailDetecting misalignments between system security and user perceptions: a preliminary socio-technical analysis of an E2E email encryption system
Stojkovski, Borce UL; Vazquez Sandoval, Itzel UL; Lenzini, Gabriele UL

in 4th European Workshop on Usable Security - 2019 IEEE European Symposium on Security and Privacy Workshops (2019)

The set of impressions that a user has about distinct aspects of a system depends on the experience perceived while interacting with the system. Considering the effects of these interactions in a security ... [more ▼]

The set of impressions that a user has about distinct aspects of a system depends on the experience perceived while interacting with the system. Considering the effects of these interactions in a security analysis allows for a new class of security properties in terms of misalignments between the system’s technical guarantees and the user’s impressions of them. For instance, a property that we call “false sense of insecurity” identifies a situation in which a secure system injects uncertainty in users, thus improperly transmitting the degree of protection that it actually provides; another, which we call “false sense of security”, captures situations in which a system instills a false sense of security beyond what a technical analysis would justify. Both situations leave room for attacks. In this paper we propose a model to define and reason about such socio-technical misalignments. The model refers to and builds on the concept of security ceremonies, but relies on user experience notions and on security analysis techniques to put together the information needed to verify misalignment properties about user’s impressions and system’s security guarantees. We discuss the innovative insight of this pilot model for a holistic understanding of a system’s security. We also propose a formal model that can be used with existing model checkers for an automatic analysis of misalignments. We exemplify the approach by modelling one specific application for end-to-end email encryption within which we analyze a few instances of misalignment properties. [less ▲]

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See detailOn Domination and Control in Strategic Ability (Extended Abstract)
Kurpiewski, Damian; Knapik, Michal; Jamroga, Wojciech UL

in Proceedings of the 31st Benelux Conference on Artificial Intelligence (BNAIC) (2019)

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See detailA Query System for Extracting Requirements-related Information from Legal Texts
Sleimi, Amin UL; Ceci, Marcello UL; Sannier, Nicolas UL et al

in Proceedings of the 27th IEEE International Requirements Engineering Conference (RE'19), pp. 319-329 (2019)

Searching legal texts for relevant information is a complex and expensive activity. The search solutions offered by present-day legal portals are targeted primarily at legal professionals. These solutions ... [more ▼]

Searching legal texts for relevant information is a complex and expensive activity. The search solutions offered by present-day legal portals are targeted primarily at legal professionals. These solutions are not adequate for requirements analysts whose objective is to extract domain knowledge including stakeholders, rights and duties, and business processes that are relevant to legal requirements. Semantic Web technologies now enable smart search capabilities and can be exploited to help requirements analysts in elaborating legal requirements. In our previous work, we developed an automated framework for extracting semantic metadata from legal texts. In this paper, we investigate the use of our metadata extraction framework as an enabler for smart legal search with a focus on requirements engineering activities. We report on our industrial experience helping the Government of Luxembourg provide an advanced search facility over Luxembourg’s Income Tax Law. The experience shows that semantic legal metadata can be successfully exploited for answering requirements engineering-related legal queries. Our results also suggest that our conceptualization of semantic legal metadata can be further improved with new information elements and relations. [less ▲]

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See detailAutomated Search for Configurations of Deep Neural Network Architectures
Ghamizi, Salah UL; Cordy, Maxime UL; Papadakis, Mike UL et al

in Automated Search for Configurations of Convolutional Neural Network Architectures (2019)

Deep Neural Networks (DNNs) are intensively used to solve a wide variety of complex problems. Although powerful, such systems require manual configuration and tuning. To this end, we view DNNs as ... [more ▼]

Deep Neural Networks (DNNs) are intensively used to solve a wide variety of complex problems. Although powerful, such systems require manual configuration and tuning. To this end, we view DNNs as configurable systems and propose an end-to-end framework that allows the configuration, evaluation and automated search for DNN architectures. Therefore, our contribution is threefold. First, we model the variability of DNN architectures with a Feature Model (FM) that generalizes over existing architectures. Each valid configuration of the FM corresponds to a valid DNN model that can be built and trained. Second, we implement, on top of Tensorflow, an automated procedure to deploy, train and evaluate the performance of a configured model. Third, we propose a method to search for configurations and demonstrate that it leads to good DNN models. We evaluate our method by applying it on image classification tasks (MNIST, CIFAR-10) and show that, with limited amount of computation and training, our method can identify high-performing architectures (with high accuracy). We also demonstrate that we outperform existing state-of-the-art architectures handcrafted by ML researchers. Our FM and framework have been released to support replication and future research. [less ▲]

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See detailProactive Model for Handling Conflicts in Sensor Data Fusion Applied to Robotic Systems
Neyens, Gilles UL; Zampunieris, Denis UL

in Proceedings of the 14th International Conference on Software Technologies (ICSOFT), 2019 Prague, Czech Republic, 26 - 28 July, 2019 (2019)

Robots have to be able to function in a multitude of different situations and environments. To help them achieve this, they are usually equipped with a large set of sensors whose data will be used in ... [more ▼]

Robots have to be able to function in a multitude of different situations and environments. To help them achieve this, they are usually equipped with a large set of sensors whose data will be used in order to make decisions. However, the sensors can malfunction, be influenced by noise or simply be imprecise. Existing sensor fusion techniques can be used in order to overcome some of these problems, but we believe that data can be improved further by computing context information and using a proactive rule-based system to detect potentially conflicting data coming from different sensors. In this paper we will present the architecture and scenarios for a generic model taking context into account. [less ▲]

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See detailResources and Competences required at the Institutional Level for a Patient – Healthcare Professional Partnership
Odero, Angela UL; Baumann, Michèle UL

in Conference Handbook EHPS : Individuals and Professionals Cooperation to health (2019)

Societal changes have catalyzed the perception of health as a personal responsibility, with social studies showing a behavioral trend where patients are increasingly seeking health information. This has ... [more ▼]

Societal changes have catalyzed the perception of health as a personal responsibility, with social studies showing a behavioral trend where patients are increasingly seeking health information. This has given rise to patients who are active players in their care, and participate in decision-making. Central to these changes, are patients and healthcare professionals’, whose backgrounds and experiences reflect both cultural factors that influence health decisions, and a power shift from professional dominance to a more equitable partnership style. Our study aims to determine resources and competences required at the institutional level to implementing a partnership Semi-structured focus groups with 20 chronic disease patients and interviews with 15 healthcare professionals were conducted. Thematic content analysis was performed with NVivo 12 to categorize verbatim. Items were grouped into dimensions, and themes common to both parties were grouped together. Three major areas emerged: 1) Training to develop a partnership culture - Training healthcare professionals in patient psychology, developing therapeutic education programs for patients and enriching available information with patients’ experiential knowledge. 2) Creation of information / support centers for: Interdisciplinary meetings, facilitating the provision of structured, verified and pertinent information and providing administrative aid to patients. 3) Development of e-health solutions to: Provide information 24/7; facilitate collaborative content creation by healthcare professionals, patients and researchers, and for sharing and updating patient files among professionals. Our findings will help design, implement, monitor and evaluate suitable actions, and help promote sustainable forms of expertise – inclusion of experiential knowledge and resource patients within the healthcare team [less ▲]

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See detailPower and Flow Assignment for 5G Integrated Terrestrial-Satellite Backhaul Networks
Lagunas, Eva UL; Lei, Lei UL; Chatzinotas, Symeon UL et al

in IEEE Wireless Communications and Networking Conference, Marrakech, Morocco, April 2019 (2019)

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See detailSearch-based Test and Improvement of Machine-Learning-Based Anomaly Detection Systems
Cordy, Maxime UL; Muller, Steve; Papadakis, Mike UL et al

in ACM SIGSOFT International Symposium on Software Testing and Analysis (2019)

Detailed reference viewed: 118 (5 UL)
See detailSelf-Adaptive Healing for Containerized Cluster Architectures with Hidden Markov Models
Samir, Areeg UL; Pahl, C.

in The Fourth IEEE International Conference on Fog and Mobile Edge Computing (2019)

Detailed reference viewed: 33 (0 UL)
See detailEvaluation of Stratified Condensation Models for a slightly inclined tube unsing ATHELT Code
Zhang, Yu; Moonesi Shabestary, Amir Hossein; Bieberle, Andre et al

in NURETH-18 (2019)

Detailed reference viewed: 35 (7 UL)
See detailFree Transit in Luxembourg: A case of post-political urban governance through policy mobility
Hesse, Markus UL; Carr, Constance UL

in Witlox, Frank (Ed.) Moving Towards More Sustainable Mobility and Transport through Smart Systems - Proceedings of the BIVEC-GIBET Transport Research Days 2019 (2019)

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See detailInterozeption bei akutem Stress und Stress-assoziierten Erkrankungen
Schulz, André UL

in Schmidt, S. (Ed.) 14. Kongress der Fachgruppe Gesundheitspsychologie. Das richtige Maß ‒ Gesundheitspsychologie zwischen Individualisierung und Bevölkerungsbezug. (2019)

Hintergrund: Das Gehirn und periphere Körperorgane tauschen permanent Informationen aus. Interozeption erfordert die Aufmerksamkeitslenkung auf afferente Signale vom Körper zum Gehirn. Stress wiederum ... [more ▼]

Hintergrund: Das Gehirn und periphere Körperorgane tauschen permanent Informationen aus. Interozeption erfordert die Aufmerksamkeitslenkung auf afferente Signale vom Körper zum Gehirn. Stress wiederum beinhaltet efferente Signalübermittlung vom Gehirn an periphere Körperprozesse. Daher kann die Interaktion von Interozeption und Stress auch als bi-direktionale Signalübermittlung zwischen Gehirn und Körper angesehen werden. Die präsentierte Studienreihe besteht aus 10 Einzelstudien, die folgende Ziele verfolgt: (1.) Die bidirektionale Hirn-Körper-Kommunikation im Normalzustand bei Gesunden zu verstehen und (2.) die Bedeutung potenziell dysregulierter Hirn-Körper-Kommunikation bei Stress-assoziierten Krankheiten aufzudecken. Methode: Dabei werden verschiedene Ebenen interozeptiver Signalübermittlung, wie frühe Repräsentation im zentralen Nervensystem (ZNS), bewusste Wahrnehmung und Aufmerksamkeitslenkung auf Körperprozesse, sowie deren Interpretation untersucht. Die beiden physiologischen Stress-Achsen, die Hypothalamus- Hypophysen-Nebennierenrinden-Achse und die sympatho-adreno-medulläre (SAM-)Achse, stehen dabei im Mittelpunkt der Untersuchungen. Ergebnisse: Zunächst wird anhand von Studien mit Stresstests und pharmakologischen Designs aufgezeigt, dass eine Aktivierung der SAM-Achse sowohl das kardiovaskuläre System stimuliert, aber auch die Aufmerksamkeitslenkung beeinträchtigt. Cortisol wiederum verstärkt Hirn-Körper-Kommunikation vor allem auf Ebene der (kortikalen) ZNS-Repräsentation. Depersonalisierungsstörung, somatoforme Störungen, Depression, posttraumatische Belastungsstörung und Borderline-Persönlichkeitsstörung zeichnen sich alle durch ein hochspezifisches Pattern der Dysregulation hinsichtlich Interozeption und physiologischer Stressachsen aus, was die Heterogenität der Körpersymptome erklären könnte. Darüber hinaus zeigt sich, dass Hirn-Körper-Kommunikation auch den Verlauf kardiovaskulärer Erkrankungen vorhersagen kann. Diskussion: Die Ergebnisse sprechen für die Entwicklung von Präventionsansätzen, die Hirn-Körper-Kommunikation mit bestimmten Trainings zu stärken, um den psychischen und körperlichen Gesundheitsverlauf positiv beeinflussen zu können. [less ▲]

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See detailAn Efficient Machine Learning Method to Solve Imbalanced Data in Metabolic Disease Prediction
Cecchini, Vania Filipa UL; Nguyen, Thanh-Phuong UL; Pfau, Thomas UL et al

in Cecchini, Vania Filipa (Ed.) An Efficient Machine Learning Method to Solve Imbalanced Data in Metabolic Disease Prediction (2019)

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See detailEffective bending stiffness of heavy steel-concrete composite columns with multiple encased steel profiles
Chrzanowski, Maciej UL; Odenbreit, Christoph UL; Degée, Hervé et al

in Proceedings of 9th International Conference on Steel and Aluminium Structures (ICSAS19) (2019)

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See detailNature et modernité : réflexions théoriques suivies d’une lecture écologique de Fenn Kaß
Thiltges, Sébastian UL

in Millim, Anne-Marie; Toffoli, Ian (Eds.) Modernismen in Luxemburg: Traditionen - Variationen - Brüche (2019)

The current environmental concerns call upon a revaluation of the concept of modernity which, a century ago, has been proven to be a major cultural and aesthetic reference. Modernist writers took up new ... [more ▼]

The current environmental concerns call upon a revaluation of the concept of modernity which, a century ago, has been proven to be a major cultural and aesthetic reference. Modernist writers took up new subjects, like industry and urbanism, as an alternative to homeland literature’s depiction of earth and soil. Batty Weber depicts in Fenn Kaß (1913) the life of a defrocked priest who leaves his native countryside to become an engineer abroad. Seemingly a novel about modernity, the book also contains several descriptions of the protagonist’s relation to the natural environment, using repeatedly the metaphor of a liquid and dissolving body. By defining both interrelated concepts of nature and modernity, this paper provides an anthropological reading of texts, questioning how salient poetical motives can challenge sociological and epistemological contextualisation. [less ▲]

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See detailJSSJ rencontre RELOCAL – Mobilisations, sens et usages du concept de justice spatiale dans un projet de recherche européen
Blondel, Cyril UL; Evrard, Estelle UL; Németh, Sarolta et al

in Justice Spatiale - Spatial Justice (2019), 13(Espace public), 1-13

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See detailAn Empirical Study on Vulnerability Prediction of Open-Source Software Releases
Jimenez, Matthieu; Rwemalika, Renaud UL; Papadakis, Mike UL et al

in Joint European Software Engineering Conference and Symposium on the Foundations of Software Engineering (ESEC/FSE) (2019)

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See detailUsing data from the HBSC study for evidence-based suicide prevention in Luxembourg
van Duin, Claire UL; Heinz, Andreas UL; Catunda, Carolina UL et al

in European Journal of Public Health (2019), 29

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See detailA parallel multi-population biased random-key genetic algorithm for electric distribution network reconfiguration
de Faria Junior, Haroldo UL; Tessaro Lunardi, Willian UL; Voos, Holger UL

in The Genetic and Evolutionary Computation Conference - GECCO'19 (2019)

This work presents a multi-population biased random-key genetic algorithm (BRKGA) for the electric distribution network reconfiguration problem (DNR). DNR belongs to the class of network design problems ... [more ▼]

This work presents a multi-population biased random-key genetic algorithm (BRKGA) for the electric distribution network reconfiguration problem (DNR). DNR belongs to the class of network design problems which include transportation problems, computer network restoration and telecommunication network design and can be used for loss minimization and load balancing, being an important tool for distribution network operators. A BRKGA is a class of genetic algorithms in which solutions are encoded as vectors of random keys, i.e. randomly generated real numbers from a uniform distribution in the interval [0, 1). A vector of random keys is translated into a solution of the optimization problem by a decoder. The decoder used generates only feasible solutions by using an efficient codification based upon the fundamentals of graph theory, restricting the search space. The parallelization is based on the single program multiple data paradigm and is executed on the cores of a multi-core processor. Time to target plots, which characterize the running times of stochastic algorithms for combinatorial optimization, are used to compare the performance of the serial and parallel algorithms. The proposed method has been tested on two standard distribution systems and the results show the effectiveness and performance of the parallel algorithm. [less ▲]

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See detailTRIDENT: A Three-Steps Strategy to Digitise an Industrial System for Stepping into Industry 4.0
Benedick, Paul-Lou UL; Robert, Jérémy UL; Le Traon, Yves UL

in Proceedings of 45th Annual Conference of the IEEE Industrial Electronics Society (2019)

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See detailMotivations & barriers of companies for shifting towards circularity
Hild, Paula UL

Poster (2019)

The research follows a qualitative research approach, including 16 exploratory and 50 semi-structured expert interviews with representatives from the building sector and automotive supply firms. The ... [more ▼]

The research follows a qualitative research approach, including 16 exploratory and 50 semi-structured expert interviews with representatives from the building sector and automotive supply firms. The preliminary results put forward the interdependence of the actors’ perception of what would mean a circular economy model for Luxembourg. They also reveal the firm’s specific role in this system. The decision of a business actor to implement a circular economy practice depends primarily on its return on investment, the general regulatory pressure and the maturity of the industry and the company. In general, the hindrance for circularity is not the absence of a technological or technical solution. Besides, the sophistication of the firm given its awareness for concepts like the circular economy, sustainable development, or sustainability shapes its vision for the future in this field actively. As a push for action, interviewees suggested a regulatory framework for circularity. [less ▲]

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See detailMart: A Mutant Generation Tool for LLVM
Titcheu Chekam, Thierry UL; Papadakis, Mike UL; Le Traon, Yves UL

in Titcheu Chekam, Thierry; Papadakis, Mike; Le Traon, Yves (Eds.) Mart: A Mutant Generation Tool for LLVM (2019)

Program mutation makes small syntactic alterations to programs' code in order to artificially create faulty programs (mutants). Mutants are used, in software analysis, to evaluate and improve test suites ... [more ▼]

Program mutation makes small syntactic alterations to programs' code in order to artificially create faulty programs (mutants). Mutants are used, in software analysis, to evaluate and improve test suites. Mutants creation (generation) tools are often characterized by their mutation operators and the way they create and represent the mutants. This paper presents Mart, a mutants generation tool, for LLVM bitcode, that supports the fine-grained definition of mutation operators (as matching rule - replacing pattern pair; uses 816 defined pairs by default) and the restriction of the code parts to mutate. New operators are implemented in Mart by implementing their matching rules and replacing patterns. Mart also implements in-memory Trivial Compiler Equivalence to eliminate equivalent and duplicate mutants during mutants generation. Mart generates mutant code as separated mutant files, meta-mutants file, weak mutation, and mutant coverage instrumented files. The generated LLVM bitcode files can be interpreted using an LLVM interpreter or compiled into native code. Mart is publicly available (https://github.com/thierry-tct/mart) for use by researchers and practitioners. Mart has been applied to generate mutants for several research experiments and generated more than 4,000,000 mutants. [less ▲]

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See detailRule-Based Supervisory Control-Extension for Automated Manufacturing Processes
Klecker, Sophie UL; Hichri, Bassem UL; Plapper, Peter UL

in International Journal of Mechanical Engineering and Robotics Research (2019)

Before performing a surface finishing process, human operators analyze the workpiece-conditions and react accordingly, i.e. they adapt the contact-situation of the tool with respect to the surface. This ... [more ▼]

Before performing a surface finishing process, human operators analyze the workpiece-conditions and react accordingly, i.e. they adapt the contact-situation of the tool with respect to the surface. This first step is ignored in most suggested automation concepts. Although their performance is satisfactory for the general process thanks to adaptive position- and force-/torque-control algorithms, they are unable to address specific problematic cases as often encountered in practice because of variations in workpiece-dimensions or -positioning. In this work, a human mimicking element is developed to overcome this limitation of current control concepts and to translate human expertise to the robotic manipulator. A rule-based system is designed where human knowledge is encoded as if-then rules. This system is integrated with a previously suggested control strategy in a hierarchical manner. The developed concept is experimentally validated on a KUKA LWR 4+-robotic manipulator. [less ▲]

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See detailSOCIAL ROLES AND PERSONALITY IN LATER LIFE
Kornadt, Anna Elena UL; Kornadt, Anna Elena UL

in Innovation in Aging (2019), 3(Supplement_1), 729-730

Despite considerable stability of the Big Five personality traits, there is evidence for personality plasticity and change across the lifespan. In younger years, the investment in social roles, such as ... [more ▼]

Despite considerable stability of the Big Five personality traits, there is evidence for personality plasticity and change across the lifespan. In younger years, the investment in social roles, such as entering worklife or starting a family has been shown to drive personality change. With regard to personality in later life, the investigation of social roles has so far been neglected. A questionnaire was developed to assess a large number of social roles that can be assumed in the second half of life. N = 306 participants aged 50 to 86 years reported on their social roles and rated their personality traits. Results show that assuming and investing in certain social roles (e.g. friend, retiree, volunteer) mediated the effects of age on the Big Five, especially for the oldest participants and in the domains openness and extraversion. The findings support the importance of social roles for personality also in later life. [less ▲]

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See detailNatural Strategic Ability under Imperfect Information
Jamroga, Wojciech UL; Malvone, Vadim; Murano, Aniello

in Proceedings of the 18th International Conference on Autonomous Agents and Multiagent Systems AAMAS 2019 (2019)

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See detailSome Things are Easier for the Dumb and the Bright Ones (Beware the Average!)
Jamroga, Wojciech UL; Knapik, Michal

in Proceedings of the Twenty-Eighth International Joint Conference on Artificial Intelligence IJCAI (2019)

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See detailA Replicable Comparison Study of NER Software: StanfordNLP, NLTK, OpenNLP, SpaCy, Gate
Schmitt, Xavier; Kubler, Sylvain; Robert, Jérémy UL et al

in International Conference on Social Networks Analysis, Management and Security (2019)

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See detailProactive Legal Design: Embedding Values in the Design of Legal Artefacts
Rossi, Arianna UL; Haapio, Helena

in Schweighofer, Erich; Kummer, Franz; Saarenpää, Ahti (Eds.) International Legal Infomatics Symposium IRIS 2019 (2019)

Legal Design is an umbrella term for merging forward-looking legal thinking with design think- ing. It applies human-centered design to prevent or solve legal problems. Legal Design takes an ... [more ▼]

Legal Design is an umbrella term for merging forward-looking legal thinking with design think- ing. It applies human-centered design to prevent or solve legal problems. Legal Design takes an interdisciplinary and proactive approach to law, covering not only legal information and documents, but also legal services, processes, and systems. This paper introduces Legal Design in the context of forward-looking Legal Tech, especially through the lenses of data protection, and analyses the analogies among Value-Sensitive Design, Proactive Law, and Privacy by Design. [less ▲]

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See detailCharles-Ferdinand Nothomb et les Belges germanophones: contribution à l'histoire des relations entre P.S.C. et C.S.P.
Brüll, Christoph UL

in Annaert, Phiilippe; Lanneau, Catherine; Dujardin, Vincent (Eds.) Charles-Ferdinand Nothomb. Une homme d'Etat, une époque. Actes du colloque tenu à Saint-Hubert le 10 juin 2016 (2019)

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See detailPortrait of a Miner in a Landscape
Biryukov, Alex UL; Feher, Daniel UL

in IEEE INFOCOM 2019 Workshop Proceedings (2019)

Mining is one of the core elements of the proof-of-work based cryptocurrency economy. In this paper we investigate the generic landscape and hierarchy of miners on the example of Ethereum and Zcash, two ... [more ▼]

Mining is one of the core elements of the proof-of-work based cryptocurrency economy. In this paper we investigate the generic landscape and hierarchy of miners on the example of Ethereum and Zcash, two blockchains that are among the top 5 in terms of USD value of created coins. Both chains used ASIC resistant proofs-of-work which favors GPU mining in order to keep mining decentralized. This however has changed with recent introduction of ASIC miners for these chains. This transition allows us to develop methods that might detect hidden ASIC mining in a chain (if it exists), and to study how the introduction of ASICs effects the decentralization of mining power. Finally, we describe how an attacker might use public blockchain information to invalidate the privacy of miners, deducing the mining hardware of individual miners and their mining rewards. [less ▲]

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See detail"Georges Perec ou la méthode pratique de la critique"
Raus, Tonia

in Absalyamova, Elina; Van Nuijs, Laurence; Stiénon, Valérie (Eds.) "Figures du critique-écrivain. Formes et pratiques du discours métalittéraire (XIXe-XXIe siècles" (2019)

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See detailTaking Stock of the Bologna Process at 20: The Possibilities and Limits of Soft Law Governance
Harmsen, Robert UL; Deca, Ligia

Scientific Conference (2019)

The Bologna Process stands as both an exemplar of regional cooperation in the higher education policy sector and as a comparatively successful instance of the use of so-called ‘soft law governance’ policy ... [more ▼]

The Bologna Process stands as both an exemplar of regional cooperation in the higher education policy sector and as a comparatively successful instance of the use of so-called ‘soft law governance’ policy instruments. Yet, as this pan-European process now marks two decades of existence, questions are increasingly being posed as to its direction and purpose. Against this background, the present paper seeks to take stock of Bologna as it enters adulthood, drawing on both the substantial body of scholarship that has emerged on the process and practitioner insights to examine its past achievements and current challenges. The paper specifically focuses on recent debates surrounding the (non-)implementation of key commitments; on the functioning of the EHEA as a policy forum in relation to both its own membership and the wider international higher education policy landscape; and on the manner in which the EHEA may respond to increasingly serious challenges to the fundamental values that underpin the process. An overall balance sheet is finally drawn, suggesting the likely direction(s) of the process going forward. [less ▲]

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