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See detailOn Projection-Based Model Reduction of Biochemical Networks Part II: The Stochastic Case
Sootla, Aivar ULg; Anderson, James

in Proceedings of the 53rd IEEE Conference on Decision and Control (2014, December)

In this paper, we consider the problem of model order reduction of stochastic biochemical networks. In particular, we reduce the order of (the number of equations in) the Linear Noise Approximation of the ... [more ▼]

In this paper, we consider the problem of model order reduction of stochastic biochemical networks. In particular, we reduce the order of (the number of equations in) the Linear Noise Approximation of the Chemical Master Equation, which is often used to describe biochemical networks. In contrast to other biochemical network reduction methods, the presented one is projection-based. Projection-based methods are powerful tools, but the cost of their use is the loss of physical interpretation of the nodes in the network. In order alleviate this drawback, we employ structured projectors, which means that some nodes in the network will keep their physical interpretation. For many models in engineering, finding structured projectors is not always feasible; however, in the context of biochemical networks it is much more likely as the networks are often (almost) monotonic. To summarise, the method can serve as a trade-off between approximation quality and physical interpretation, which is illustrated on numerical examples. [less ▲]

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See detailGeneral guidelines for planning and conducting round robins in EGOLF
Dumont, Fabien ULg; Steen-Hansen, Anne

Report (2014)

Conducting round robin exercises is one of EGOLF's key activities. A round robin exercise is a necessary tool to improve and maintain a good level of quality within EGOLF. A good plan of the round robin ... [more ▼]

Conducting round robin exercises is one of EGOLF's key activities. A round robin exercise is a necessary tool to improve and maintain a good level of quality within EGOLF. A good plan of the round robin exercise will make the work easier, and will help avoid problems and misunderstandings. The intention is to give general guidelines on how to organize round robins in a standardized way within EGOLF. The document is divided into the following parts - Preparing and planning the round robin - Testing - Data analysis and reporting These guidelines comply with the ISO 5725 prescriptions. [less ▲]

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See detailLe roman pour la jeunesse
Delbrassine, Daniel ULg

in Ministère de la Culture de la Fédération Wallonie Bruxelles (Ed.) Répertoire des auteurs et illustrateurs de livres pour l'enfance et la jeunesse en Wallonie et à Bruxelles (2014)

Introduction consacrée aux romans pour la jeunesse dans un ouvrage de référence diffusé par le Ministère de la Culture et Wallonie-Bruxelles International

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See detailStigmergy as a mechanism to produce collective vortex behaviours: a study case in shoveler duck
Delcourt, Johann ULg; bode, W. Nikolaï

Poster (2014, December)

Ant mill, caterpillar circle, bat donut, bacteria vortex, duck swirl and fish torus are different names for rotating circular formations of animals, where individuals turn around a common centre. Even if ... [more ▼]

Ant mill, caterpillar circle, bat donut, bacteria vortex, duck swirl and fish torus are different names for rotating circular formations of animals, where individuals turn around a common centre. Even if the ubiquity of this behavioural phenomenon might have suggested common causes or fundamental underlying principles across contexts, a variety of proximate mechanisms can give rise to vortex behaviours. Here, we investigate if stigmergic process (mechanism of self-organisation wit hout direct communication or interaction between individuals) is able to produce different collective behaviours, notably collective vortices. We present an individual-based simulation model for the movement of populations in a resource landscape that allows us to vary the strength of the interactions mentioned above. The key assumption and novelty of our model is that individuals can cause the release of additional nutrients, as well as consuming them. Our model produces clear predictions. For example, we expect more tortuous individual movement paths and higher levels of aggregation in populations occupying homogeneous environments where individual movement makes more nutrients available. We also show how observed movement dynamics could change when local nutrient sources are depleted or when the population density increases. Our predictions are testable and qualitatively reproduce the different feeding behaviours observed in filter-feeding ducks (Anas clypeata), for example. We suggest that considering two-way interactions between feeding individuals and resource landscapes could help to explain fine-scale movement dynamics. [less ▲]

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See detailEchos en série. Formes et enjeux de la réplique dans "The Wire"
Belloi, Livio ULg

in TV/Series (2014), 6

Vaste « roman visuel » (David Simon), la série The Wire (HBO, 2002-2008) se donne pour ambition d’explorer sous toutes ses coutures la ville américaine de Baltimore. En termes de construction narrative ... [more ▼]

Vaste « roman visuel » (David Simon), la série The Wire (HBO, 2002-2008) se donne pour ambition d’explorer sous toutes ses coutures la ville américaine de Baltimore. En termes de construction narrative, les soixante épisodes composant cette série s’ordonnent à un ample mouvement cyclique, au terme duquel rien, en définitive, n’a vraiment changé : The Wire se clôture en effet par un cinglant retour à la case départ. Au sein de cette structure en boucle, les phénomènes d’écho et de reprise foisonnent et affectent la série sous de multiples aspects. Le présent article s’emploie à dégager divers effets d’écho en tant qu’ils se jouent dans la sphère du langage. Il s’agit plus précisément de porter au jour un curieux micro- phénomène selon lequel, tout au long de la série, certains personnages sont amenés à prononcer les mêmes lignes de dialogue, tantôt de manière délibérée, tantôt de manière inconsciente. Après avoir débusqué la première occurrence de ce phénomène dans la trame complexe de The Wire, nous nous attachons à examiner quelques cas de figure précis, dans une perspective qui se veut d’abord morphologique. Chemin faisant, une notion s’impose : celle de réplique, que The Wire, comme objet de langage, nous invite à entendre dans un fécond double sens – ligne de dialogue et fait d’itération. [less ▲]

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See detailThe apoptosis of osteoblasts and osteocytes in femoral head osteonecrosis: its specificity and its distribution
Mutijima E; De Maertelaer V; Deprez M et al

in Clinical Rheumatology (2014), 33(12), 1791-5

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See detailDeux ans de formation et d’accompagnement techno-pédagogique à l’ULg : public, impact et perspectives
Van de Poël, Jean-François ULg; Verpoorten, Dominique ULg

in Education & Formation (2014), e-302

Cet article présente une recherche quanti-qualitative portant sur 225 enseignants ayant suivi des formations techno-pédagogiques dispensées par la Cellule eCampus (IFRES, Université de Liège, Belgique) de ... [more ▼]

Cet article présente une recherche quanti-qualitative portant sur 225 enseignants ayant suivi des formations techno-pédagogiques dispensées par la Cellule eCampus (IFRES, Université de Liège, Belgique) de 2011 à 2013. Les données récoltées sont utilisées pour : a) qualifier le public de ces formations, b) évaluer, grâce à une grille d’analyse de discours nommée CInOpTIC, leurs effets sur le développement techno-pédagogique des participants, c) étudier la demande d’accompagnement techno-pédagogique, considérée comme un effet induit par les formations. Sur base des données empiriques analysées, l’article élabore des perspectives pour la régulation des formations eLearning. [less ▲]

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See detailGérer les différences : une préoccupation commune
Blondin, Christiane ULg; Cornet, Jacques; Delvaux, Bernard

in Education et formation (2014), e-302

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See detailDe la satisfaction à la performance : Dépasser les indicateurs de satisfaction pour évaluer et réguler efficacement
Jacquet, Maud ULg; Maillart, Christelle ULg; Georges, François ULg et al

in Education & Formation (2014), e-302

Dans le cadre de la formation en logopédie à l'ULg, un examen certificatif de langue française a été mis en place afin de répondre aux exigences de la profession. Pour y préparer les étudiants, l’unité de ... [more ▼]

Dans le cadre de la formation en logopédie à l'ULg, un examen certificatif de langue française a été mis en place afin de répondre aux exigences de la profession. Pour y préparer les étudiants, l’unité de logopédie clinique, l’Institut Supérieur des Langues Vivantes (ISLV) et le Laboratoire de Soutien aux synergies Enseignement-Technologie (LabSET) de l’Université de Liège (ULg) ont conçu un dispositif hybride d’apprentissage et de remédiation en langue française. Depuis 2011, ce dispositif offre aux étudiants un environnement de travail en ligne visant à soutenir leur apprentissage autonome du français. Malgré une importante satisfaction vis-à-vis du dispositif, les performances demeurent insuffisantes. Cependant, un groupe d’étudiants se distinguent. Une analyse qualitative basée sur des interviews met en évidence chez ces étudiants 1) une bonne connaissance des stratégies cognitives efficaces en termes d’apprentissage, 2) une certaine capacité à planifier et ajuster leur travail et 3) des indicateurs d’une motivation autodéterminée et intrinsèque. Soutenus par le dispositif et ses caractéristiques, il est probable que ces facteurs soient à l’origine de leur succès. Pour des étudiants peut-être encore trop scolaires, principalement soucieux de leurs résultats à l'examen et peu enclins à identifier leurs besoins, la liberté offerte par le dispositif fait naitre un sentiment de satisfaction mais ne suffit pas à un apprentissage de qualité. [less ▲]

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See detailGenetic structure of nase, Chondrostoma nasus, and common barbel, Barbus barbus (Teleostei, Cyprinidae) populations in South Belgium rivers: toward a rational management of conservation restocking
Gennotte, Vincent ULg; Michaux, Johan ULg; Prignon, Christian ULg et al

Poster (2014, December)

Nase (Chondrostoma nasus) and common barbel (Barbus barbus) are two rheophilic cyprinid fish naturally present in the Belgian Meuse and Rhine basins. During the last decades, the construction of dams ... [more ▼]

Nase (Chondrostoma nasus) and common barbel (Barbus barbus) are two rheophilic cyprinid fish naturally present in the Belgian Meuse and Rhine basins. During the last decades, the construction of dams together with changes in hydrological regimes, modifications of riverbed morphology and water pollution have caused some local dramatic declines in their populations. However, recent improvements in terms of water quality and habitat fragmentation allow considering as realistic a rational restocking plan of locally endangered patrimonial fish species such as nase and common barbel. Restocking operations for a conservation purpose have to be based on the knowledge and the use of wild type genetic strains. Therefore, the aim of this study was to characterize the genetic structure and diversity of nase and common barbel populations in South Belgium rivers. Wild common barbels (n = 313) and nases (n = 271) were sampled by electrofishing in respectively 10 and 6 different tributaries from the Meuse and Rhine rivers. Genotyping was performed on 24 microsatellite markers for each species. Preliminary results showed, for both species, a differential genetic clustering between fish originating from the Meuse basin and those originating from the Rhine basin. Detailed analysis describing the genetic structure and diversity of South Belgium populations will be presented and will serve as a management tool to set up a breeding plan for conservation restocking. [less ▲]

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See detailFungal lipase production by solid-state fermentation
Ramos-Sanchez, L.B.; Julian-Ricardo, M.C.; Cordova, J. et al

Conference (2014, December)

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See detailMilieuongelijkheden: een onderzoek naar de woonomstandigheden in Wallonië
Lejeune, Zoé ULg; Xhignesse, Guillaume ULg; Kryvobokov, Marko et al

in Dierckx, Danielle; Coene, Jill; Raeymaeckers, Peter (Eds.) Armoede en Sociale Uitsluiting, Jaarboek 2014 (2014)

This article has two aims. Firstly, to introduce the important environmental inequality scholarship, mostly imported from the USA, in the Belgian context, where few studies have been carried out to date ... [more ▼]

This article has two aims. Firstly, to introduce the important environmental inequality scholarship, mostly imported from the USA, in the Belgian context, where few studies have been carried out to date on this topic. Secondly, to propose an unconventional approach to environmental inequality scholarship by focusing on housing conditions as substantial environmental inequalities. On this latter premise, we based this study on the CEHD housing quality survey carried out in 2012 and 2013 in Wallonia, to test several hypotheses as regards the relationships between housing quality, poverty, and spatial differentiation – discrepancies among population and space. The results confirm most of our research hypotheses, showing important inequalities in terms of housing conditions between wealthy and poor populations, as well as between urban areas, on the one hand, and suburban and rural areas, on the other. Our findings call for new avenues and priorities for housing policies in Wallonia, and for further research on housing quality as environmental inequality: with a focus on a specific target public – single households, and on subjective perception of environmental nuisances in and surrounding home. [less ▲]

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See detailPREDICTION OF SHORT-TERM OUTCOME IN PREGNANT WOMEN WITH SUSPECTED PREECLAMPSIA: THE PROGNOSIS STUDY
Zeisler, Harald; Llurba, Elisa; CHANTRAINE, Frédéric ULg et al

Poster (2014, December)

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See detailIN UTERO INFECTION BY SCHMALLENBERG VIRUS INDUCES ARTHROGRYPOSIS MULTIPLEXA CONGENITA IN OVINE FETUSES
Boseret, Geraldine; Claine, Francoise; Coupeau, Damien et al

Poster (2014, December)

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See detailLa "nuit étoilée" et le "triangle hyperéchogène péri-veineux hilaire", signes de torsion splénique à l'échographie?
Terradas Crespo, Emilia; Barthelemy, Nicolas ULg; Gommeren, Kris ULg et al

in Monde Vétérinaire (Le) : European Veterinary Magazine (2014), 147

Une splénomégalie avec des plages hypoéchogènes diffuses et de multiples lignes hyperéchogènes parallèles dans le parenchyme, appelé lacy pattern ou stary sky = nuit étoilée, est un signe ayant une haute ... [more ▼]

Une splénomégalie avec des plages hypoéchogènes diffuses et de multiples lignes hyperéchogènes parallèles dans le parenchyme, appelé lacy pattern ou stary sky = nuit étoilée, est un signe ayant une haute probabilité de torsion splénique à l’échographie. Un autre signe échographique a été décrit comme étant un signe encore plus fiable de torsion splénique aigue. Il s’agit du triangle hyperéchogène péri-veineux hilaire. Cependant, ces signes ne sont pas des signes pathognomoniques de torsion splénique à l’échographie. [less ▲]

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See detailSpecialist nurse in Europe: education, regulation and role
Dury, Cécile ULg

in International Nursing Review (2014), 61(4), 454-462

Background: The concept of a ‘specialist nurse’ has existed for many years and related education programmes are proliferating. However, while literature clearly outlines the roles and practice of ... [more ▼]

Background: The concept of a ‘specialist nurse’ has existed for many years and related education programmes are proliferating. However, while literature clearly outlines the roles and practice of registered nurses and advanced practice nurses, those of specialist nurses remain unclear and nursing specializations across Europe need clarifying. Aim: This pilot study aimed to explore the competencies, education requirements and regulation of specialist nurses in Europe. Design: A descriptive cross-sectional survey. Methods: An online questionnaire named ‘Specialist nurse and specialization in Europe’ was sent to 550 members of the European Federation of Nurse Educators and ten members of the European Specialist Nurses Organizations. Snowball sampling was then used to build a convenience sample of nurse educators, clinical nurses and specialist nurses, national nursing association members, and chief nursing officers from all European countries. Besides quantitative aspects, responses to open-ended questions were analysed using a qualitative content analysis process. Results: A total of 77 experts from 29 European countries responded to the questionnaire. Findings highlighted variations in titles, levels and length of education, certification, regulation and scope of practice for specialized nurses in Europe. Analysis of the promoted competencies revealed dominant clinical and technical aspects of the role with a high level of knowledge.Conclusions: The study emphasized the need to improve standards for education, certification and regulation for specialist nurses. Interpretation of the role and competencies is diverse with a weak presence of health policy that would enhance and develop the specialities. Implications for nursing and health policy: To address the current lack of provisions for automatic recognition of specialist nurses, common training frameworks corresponding to the relevant level of the European Qualifications Framework should promote lifelong learning and mobility, and enhance levels of health care and patient safety. [less ▲]

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See detailENSO forecast using a wavelet-based mode decomposition
Deliège, Adrien ULg; Nicolay, Samuel ULg; Fettweis, Xavier ULg

Poster (2014, December)

We introduce a new method for forecasting major El Niño/ La Niña events based on a wavelet mode decomposition. This methodology allows us to approximate the ENSO time series with a superposition of three ... [more ▼]

We introduce a new method for forecasting major El Niño/ La Niña events based on a wavelet mode decomposition. This methodology allows us to approximate the ENSO time series with a superposition of three periodic signals corresponding to periods of about 31, 43 and 61 months respectively with time-varying amplitudes. This pseudo-periodic approximation is then extrapolated to give forecasts. While this last one only resolves the large variations in the ENSO time series, three years hindcast as retroactive prediction allows to recover most of the El Niño/ La Niña events of the last 60 years. [less ▲]

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