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See detailRepresentations of Incident Reporting as a Collective Learning Process
Rossignol, Nicolas ULg; Turcanu, Catrinel

Conference (2014, June)

In the context of vulnerability analysis, it is now widely aknowledged that social factors should be taken into account, alongside technical ones. Depending on the particular approach adopted, these ... [more ▼]

In the context of vulnerability analysis, it is now widely aknowledged that social factors should be taken into account, alongside technical ones. Depending on the particular approach adopted, these social factors are considered to influence “coping capacities”, “adaptive capacities” or “resilience”. The ability of a socio-technical system to learn from past incidents and accidents seems to have a positive influence on its vulnerability, as it increases its capacity to adapt properly in case of future unwanted envents. To that regard, incident reporting systems are of first importance as they are supposed to constitute a collective memory of past incidents, to initiate a collective share of information and to foster collective learning and adapations. Yet, the theoretical assumptions about the ability of a reporting system to imply collective learning have still to be demonstrated. This paper proposes a methodology addressing this issue. To do so, we conduct a number of semi-structured interviews in a nuclear facility with various types of actors (managers, lab responsibles, technical workers), and in different risk contexts. In addition, participants are requested to produce a mental map of the reporting system they are concerned with. These inputs are then analyzed following a “cross-case analysis” procedure in order to identify patterns of actors' representations of the reporting system, and to link these patterns to potential learning processes fostered by the system. This constitutes the first step of an inductive research process aiming to identify and characterize the link between reporting systems and collective learning. In the next steps, the link between the identified patterns of representations and collective learning processes will be tested quantitatively. The final aim being to elaborate ways to improve Incident Reporting Systems to improve collective learning. [less ▲]

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See detailDe Europese Unie en Brazilië: eindelijk een (strategisch?) partnershap
Santander, Sébastian ULg

in Internationale Spectator (2014), 68(6), 40-44

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See detailSimple connectome inference from partial correlation statistics in calcium imaging
Sutera, Antonio ULg; Joly, Arnaud ULg; François-Lavet, Vincent ULg et al

in Proceedings of Connectomics 2014 (ECML 2014) (2014, June)

In this work, we propose a simple yet effective solution to the problem of connectome inference in calcium imaging data. The proposed algorithm consists of two steps. First, processing the raw signals to ... [more ▼]

In this work, we propose a simple yet effective solution to the problem of connectome inference in calcium imaging data. The proposed algorithm consists of two steps. First, processing the raw signals to detect neural peak activities. Second, inferring the degree of association between neurons from partial correlation statistics. This paper summarises the methodology that led us to win the Connectomics Challenge, proposes a simplified version of our method, and finally compares our results with respect to other inference methods. [less ▲]

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See detailDes noces du politique et de la prospective
Brunet, Sébastien ULg

in Guyot, Jean-Luc; Brunet, Sébastien (Eds.) Construire les futurs (2014)

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See detailConstruire les futurs
Guyot, Jean-Luc; Brunet, Sébastien ULg

Book published by Presses universitaires de Namur (2014)

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See detailEugène Catalan
Bair, Jacques ULg; Haesbroeck, Gentiane ULg

in Tangente (2014), 158

Eugène Catalan est né il y a exactement 200 ans ! Ses travaux mathématiques sont remarquables, tant par leur quantité (on dénombre environ 380 articles et 70 livres ou mémoires) que du point de vue de ... [more ▼]

Eugène Catalan est né il y a exactement 200 ans ! Ses travaux mathématiques sont remarquables, tant par leur quantité (on dénombre environ 380 articles et 70 livres ou mémoires) que du point de vue de leur qualité et de leur variété. En effet, son nom est encore aujourd'hui associé à de nombreux domaines des mathématiques. Citons notamment diverses conjectures fameuses sur les nombres ou équations, l'étude de nombres éponymes en combinatoire, l'introduction des polyèdres semi-réguliers ou des surfaces minimales en géométrie, le calcul d'intégrales multiples ou encore de séries en analyse. A l'occasion de cet anniversaire, nous mettons en évidence quelques éléments de sa biographie. [less ▲]

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See detailHigh Throughput sequencing and biological research: Paradigm switches from genetics to ecophysiology
Massart, Sébastien ULg

Scientific conference (2014, June)

A technological revolution is ongoing in sequencing and is deeply impacting biological research. This leads to paradigm switches in traditional « sequencing-friendly » areas, like genetic or microbiology ... [more ▼]

A technological revolution is ongoing in sequencing and is deeply impacting biological research. This leads to paradigm switches in traditional « sequencing-friendly » areas, like genetic or microbiology, but also expands the usefulness of sequencing in other areas such as ecophysiology or ecology. [less ▲]

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See detailA New Three Object Triangulation Algorithm for Mobile Robot Positioning
Pierlot, Vincent ULg; Van Droogenbroeck, Marc ULg

in IEEE Transactions on Robotics (2014), 30(3), 566-577

Positioning is a fundamental issue in mobile robot applications. It can be achieved in many ways. Among them, triangulation based on angles measured with the help of beacons is a proven technique. Most of ... [more ▼]

Positioning is a fundamental issue in mobile robot applications. It can be achieved in many ways. Among them, triangulation based on angles measured with the help of beacons is a proven technique. Most of the many triangulation algorithms proposed so far have major limitations. For example, some of them need a particular beacon ordering, have blind spots, or only work within the triangle defined by the three beacons. More reliable methods exist; however, they have an increasing complexity or they require to handle certain spatial arrangements separately. In this paper, we present a simple and new three object triangulation algorithm, named ToTal, that natively works in the whole plane, and for any beacon ordering. We also provide a comprehensive comparison between many algorithms, and show that our algorithm is faster and simpler than comparable algorithms. In addition to its inherent efficiency, our algorithm provides a very useful and unique reliability measure, assessable anywhere in the plane, which can be used to identify pathological cases, or as a validation gate in Kalman filters. [less ▲]

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See detailBeAMS: a Beacon based Angle Measurement Sensor for mobile robot positioning
Pierlot, Vincent ULg; Van Droogenbroeck, Marc ULg

in IEEE Transactions on Robotics (2014), 30(30), 533-549

Positioning is a fundamental issue in mobile robot applications, and it can be achieved in multiple ways. Among these methods, triangulation based on angle measurements is widely used, robust, accurate ... [more ▼]

Positioning is a fundamental issue in mobile robot applications, and it can be achieved in multiple ways. Among these methods, triangulation based on angle measurements is widely used, robust, accurate, and flexible. This paper presents BeAMS, a new active beacon-based angle measurement system used for mobile robot positioning. BeAMS introduces several major innovations. One innovation is the use of a unique unsynchronized channel with On-Off Keying modulated infrared signals to measure angles and to identify the beacons. We also introduce a new mechanism to measure angles: our system detects a beacon when it enters and leaves an angular window. We show that the estimator resulting from the center of this angular window provides an unbiased estimate of the beacon angle. A theoretical framework for a thorough performance analysis of BeAMS is provided. We establish the upper bound of the variance and validate this bound through experiments and simulations; the overall error measure of BeAMS is lower than 0.24 deg for an acquisition rate of 10 Hz. In conclusion, BeAMS is a low power, flexible, and robust solution for angle measurement, and a reliable component for robot positioning. [less ▲]

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See detailJustitie hervormen: leren uit de intrede van HR-adviseurs
Delvaux, David ULg; Schoenaers, Frédéric ULg

in Orde van de dag (2014), 66

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See detailReading Cadaveric Decomposition Chemistry with a New Pair of Glasses
Stefanuto, Pierre-Hugues ULg; Perrault, Katelynn; Stadler, Sonja et al

in CHEMPLUSCHEM (2014)

Smell it out! Thermal desorption has been coupled with comprehensive two-dimensional gas chromatography time of-flight mass spectrometry for the characterization of a cadaveric volatile organic compound ... [more ▼]

Smell it out! Thermal desorption has been coupled with comprehensive two-dimensional gas chromatography time of-flight mass spectrometry for the characterization of a cadaveric volatile organic compound mixture producedduring the active decay stage (see figure). The combined use of the Fisher ratio and principal component analysis provided further characterization of the chemical profile of decomposition. [less ▲]

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See detailLe portrait photographique d'écrivain vu de face et de profil
Bertrand, Jean-Pierre ULg; Durand, Pascal ULg; Lavaud, Martine

in COnTEXTES : Revue de Sociologie de la Littérature (2014), 14

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See detailExploitation du concept de 'physical literacy' dans le cadre d'une séance d'ergonomie et de manutention
Laurent, Charlotte; Mouton, Alexandre ULg; Cloes, Marc ULg

in Revue de l'Education Physique (2014), 54(2), 43-53

Cet article présente une leçon d'éducation physique proposée à une classe de filles engagées dans une formation professionnelle en puériculture. Après une description du contexte d'enseignement, les ... [more ▼]

Cet article présente une leçon d'éducation physique proposée à une classe de filles engagées dans une formation professionnelle en puériculture. Après une description du contexte d'enseignement, les auteurs décrivent les contenus proposés aux élèves et illustrent les principes didactiques qui ont été appliqués dans cette séance au cours de laquelle la participation a été optimale en raison du sens donné aux activités. [less ▲]

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See detailFigures du critique-écrivain, formes et pratiques du discours métalittéraire: Introduction et conclusions
Stienon, Valérie ULg; Van Nuijs, Laurence

Conference (2014, June)

Du XIXe siècle à nos jours, de nombreux écrivains ont combiné écriture de création et critique littéraire. À ces pratiques mêlées correspondent des statuts hybrides, dont celui de « critique-écrivain » ... [more ▼]

Du XIXe siècle à nos jours, de nombreux écrivains ont combiné écriture de création et critique littéraire. À ces pratiques mêlées correspondent des statuts hybrides, dont celui de « critique-écrivain » est peut-être le plus représentatif. Ce colloque se propose d’interroger cette figure bifide, en prenant en considération les divers paramètres de la critique littéraire en tant que pratique protéiforme, depuis l’institutionnalisation de la critique au XIXe siècle (critique journalistique, critique des écrivains et critique universitaire) jusqu’à la diversification moderne des types de discours critique (théorique, historique, médiatique, essayiste, romanesque). Comment les rapports entre critique et création sont-ils imaginés, confirmés voire inversés par les écrivains ? Par rapport à quels modèles et repoussoirs les écrivains se définissent-ils en critiques ou en créateurs (ceux, par exemple, du théoricien, de l’essayiste, du chroniqueur, du sociologue ou encore du polémiste) ? Pourquoi la postérité a-t-elle retenu comme critiques des auteurs qui ont par ailleurs investi ou approché une production spécifiquement littéraire ? Et comment ces rapports se renégocient-ils tout au long de l’histoire de la critique ? [less ▲]

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See detailTwo Scenarios for Quantum Multifractality Breakdown
Dubertrand, Rémy; Garcia-Mata, Ignacio; Georgeot, Bertrand et al

in Physical Review Letters (2014), 112

We expose two scenarios for the breakdown of quantum multifractality under the effect of perturbations. In the first scenario, multifractality survives below a certain scale of the quantum fluctuations ... [more ▼]

We expose two scenarios for the breakdown of quantum multifractality under the effect of perturbations. In the first scenario, multifractality survives below a certain scale of the quantum fluctuations. In the other one, the fluctuations of the wave functions are changed at every scale and each multifractal dimension smoothly goes to the ergodic value. We use as generic examples a one-dimensional dynamical system and the three-dimensional Anderson model at the metal-insulator transition. Based on our results, we conjecture that the sensitivity of quantum multifractality to perturbation is universal in the sense that it follows one of these two scenarios depending on the perturbation. We also discuss the experimental implications. [less ▲]

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See detailAn Investigation into the Influence of External Walls Reflectivity on the Indoor Daylight Availability in Desert Climates
Hegazy, Mohamed Amer; Attia, Shady ULg

in Conference Proceedings: Building Simulation and Optimization 2014 (2014, June)

Hot arid climates are characterized by clear sunny sky most of the year time. Such climates affects the urban morphology, which requires sometimes dense urban fabric. Narrow streets have significant ... [more ▼]

Hot arid climates are characterized by clear sunny sky most of the year time. Such climates affects the urban morphology, which requires sometimes dense urban fabric. Narrow streets have significant effect on the amount of daylight permeating indoor residential zones, which may have a negative or positive effect on the overall visual performance. This paper studies the quantitative effect of using different Façade reflectivity ratios, under different street widths, on the indoor daylight autonomy. The researcher performed a parametric analysis using DIVA for Rhino simulation tool on a hypothetical residential building unit with various window ratios facing neighbouring buildings. Four main orientations were examined under different urban contexts and wall reflectivity. This paper aims to measure daylight autonomy and address possible strategies and solutions to achieve better daylighting that can be used by architects at early design stages of housing developments in the desert climates. [less ▲]

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See detailPrediction of SOx and NOx Emissions from a Medium Size Biomass Boiler Biomass and Bioenergy
Sartor, Kevin ULg; Restivo, Yannick ULg; Ngendakumana, Philippe ULg et al

in Biomass and Bioenergy (2014), 65

While small and medium size biomass combined heat and power (CHP) plants (i.e., up to 5 MW of electrical rated power) represent an attractive option to exploit locally available biomass resources at low ... [more ▼]

While small and medium size biomass combined heat and power (CHP) plants (i.e., up to 5 MW of electrical rated power) represent an attractive option to exploit locally available biomass resources at low cost, the corresponding investment per unit of rated power significantly rises when the installed power decreases. In these cases, secondary pollutant emissions control measures are most of the time not economically viable and primary emissions control must be used alone to avoid the formation of undesired compounds such as $NO_x$ and $SO_x$. Primary control measures require the careful optimization of fuel quality and combustion process. For plant operators, being able to accommodate biomass quality changes in order to minimize the fuel cost can be of great importance in order to guarantee the profitability of the plant. This contribution is dedicated to the development of a zero-dimensional (input-output) combustion simulation model able to predict the pollutants emissions resulting from complete and incomplete combustion with respect to varying combustion operation (ambient temperature, humidity, fumes recirculation,..). This tool is intended to be integrated in a global simulation model of the CHP plant and the attached district heating network installed on the University campus in Liège. Doing so, the plant operation can be optimized with respect to economic as well as environmental and energetic aspects (3E approach) thus ensuring the sustainability of the approach. [less ▲]

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See detailProduction, Private Economy and State Entanglement in Early Northern Mesopotamia
Mas, Juliette ULg

Conference (2014, June)

Ancient economic systems from Southern and Central Mesopotamia are quite well known when Northern Mesopotamia ones remain less known from this point of view. If we already know that, during Bronze Age ... [more ▼]

Ancient economic systems from Southern and Central Mesopotamia are quite well known when Northern Mesopotamia ones remain less known from this point of view. If we already know that, during Bronze Age, households played a deciding role in several kinds of production, their degree of dependence or independence to the State still has to be cleared. The archaeological data clearly show that private workshops, set up in private houses, could be very efficient and specialized. Furthermore, these economic entities could be assimilated to private enterprises, which were able to handle their own administrative duties. On the other hand, we know from the texts that the Palace and the temples were also a main element of ancient economic systems. If public administrations should, in some cases, have supplied raw materials, hired workforce, and dealt with the distribution of produced goods, it seems that the production didn’t take place in the palace itself. Dealing both with archaeological and textual data, could help to better define the role and the importance of both public and private components in early Mesopotamian economic systems. [less ▲]

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See detailLa laïcité contre elle-même
Jacquemain, Marc ULg

in Collectif Tayush (Ed.) Les défis du pluriel. Egalité, diversité, laïcité (2014)

Résumé : la laïcité fait depuis une vingtaine d’année un retour remarqué dans le débat public, tant en France qu’au Québec ou en Belgique francophone. Un retour très ambigu cependant : la laïcité divise ... [more ▼]

Résumé : la laïcité fait depuis une vingtaine d’année un retour remarqué dans le débat public, tant en France qu’au Québec ou en Belgique francophone. Un retour très ambigu cependant : la laïcité divise aujourd’hui les mouvements qui s’en réclamaient depuis toujours (la gauche politique et syndicale, le féminisme, l’antiracisme …) et est au contraire revendiquée par ceux qui la rejetaient violemment (la droite populiste et l’extrême-droite). Cette logique « à front renversé » puise ses racines dans l’histoire de la dynamique laïque dans ces trois ensembles francophones, dynamique devenue majoritairement anti-religieuse, à force de s’affronter aux prétentions hégémoniques de l’Eglise catholique. Dans un contexte où le catholicisme a perdu beaucoup de sa vigueur, une partie (majoritaire) du mouvement laïque reproduit aujourd’hui cette logique anti-religieuse contre l’islam, religion minoritaire et stigmatisée. C’est le pire des choix : le discours laïque anti-religieux se fait le parfait symétrique du discours islamiste, puisqu’il répand l’idée qu’il est impossible d’être musulman et laïque. A l’inverse, une laïcité réanimant ses fondamentaux (séparation, neutralité, liberté de conscience et égalité) constituerait la meilleure garantie de la cohabitation pacifique des diverses convictions (religieuses ou non), en particulier dans un pays comme la Belgique où ces convictions ne constituent qu’une mosaïque de minorités. [less ▲]

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