References of "Unpublished conference"
     in
Bookmark and Share    
Full Text
See detailEfficacité, efficience, qualité : quelle évaluation pour quelle Justice ?
Ficet, Joël ULg

Conference (2009, September 18)

Detailed reference viewed: 55 (4 ULg)
Full Text
See detailSynthesis of novel block copolymers by cobalt-mediated radical polymerization (CMRP) and isoprene-assisted radical coupling reaction (I-ARC)
Debuigne, Antoine ULg; Jérôme, Christine ULg; Detrembleur, Christophe ULg

Conference (2009, September 17)

Nowadays, progresses in medicine, biotechnology, microelectronic and many other fields are more and more sustained by the development of novel polymer materials with constantly improved properties and ... [more ▼]

Nowadays, progresses in medicine, biotechnology, microelectronic and many other fields are more and more sustained by the development of novel polymer materials with constantly improved properties and well-defined molecular parameters. In this context, we designed an innovative and very promising tool for macromolecular engineering. This technique, called Isoprene-Assisted Radical Coupling (I-ARC), allows to couple quantitatively polymer chains preformed by Cobalt-Mediated Radical Polymerization (CMRP), an efficient controlled radical polymerization system for vinyl acetate (VAc) and acrylonitrile (AN). Typically, addition of isoprene to well-defined polymers prepared by CMRP invariably leads to the quantitative coupling reaction of the chains, as assessed by the perfect doubling of the molar mass of the polymer. Importantly, the I-ARC reaction is not limited to macromolecules with low molar masses and homopolymers, contrary to the previously reported radical chains coupling methods. Indeed, when applied to diblock copolymers, I-ARC constitutes a straightforward approach for the synthesis of telechelic symmetrical ABA triblock copolymers, as illustrated by the preparation of poly(vinyl acetate)-b-poly(acrylonitrile)-b-poly(vinyl acetate) triblock copolymers and their derivatives. [less ▲]

Detailed reference viewed: 29 (2 ULg)
Peer Reviewed
See detailPrevalence of hearing voices in the general population
Krakvik, Bodil; Kalhovde, Anne-Martha; Laroi, Frank ULg et al

Conference (2009, September 17)

Detailed reference viewed: 6 (0 ULg)
Peer Reviewed
See detailTaking into account direct and indirect impacts when measuring the performance of social entreprises
Marée, Michel ULg; Mertens de Wilmars, Sybille ULg

Conference (2009, September 16)

The present article aims to provide a synthetical analysis of the various methods used to measure the non-market dimension of a product. In a first stage, we define the various notions linked to the ... [more ▼]

The present article aims to provide a synthetical analysis of the various methods used to measure the non-market dimension of a product. In a first stage, we define the various notions linked to the dimensions of the production of a "merit good": direct and indirect impacts, externalities, collective impacts, etc. We then envisage the way in which these various dimensions are generally measured in economic literature, and we highlight the advantages and drawbacks of the various methods. We attempt to demonstrate why the method based on the economic value of a non-market production, despite its advantages and its success, raises many methodological, but also, more fundamentally, conceptual questions, which jeopardise the reliability of the estimations produced. As far as the production of social enterprises is concerned, the article will thus make a case for a more classical approach, mainly based on the method of indicators. [less ▲]

Detailed reference viewed: 73 (15 ULg)
See detailThe Mars ultraviolet dayglow variability: SPICAM observations and model comparison
Gérard, Jean-Claude ULg; Cox, Cédric ULg; Bougher, S. W. et al

Conference (2009, September 16)

Limb profiles of the CO Cameron and CO2+ doublet airglow have been observed over different conditions (latitude, season, SZA, F10.7). They have been individually modelled using currently accepted cross ... [more ▼]

Limb profiles of the CO Cameron and CO2+ doublet airglow have been observed over different conditions (latitude, season, SZA, F10.7). They have been individually modelled using currently accepted cross sections, and outputs from the MTGCM. They have been shown to co-vary, with a ICO/ICO2+ ratio of about 4.7, less than the modelled ratio.The peak brightness varies linearly with the F10.7 solar flux proxy, in a way compatible with the Mariner 6 and 7 observations. The intensity of both emissions is overestimated by the model (but large uncertainties exist in excitation cross sections). An increase of the altitude of both emissions has been observed during the 2005 summer season. It is a consequence of the dust load, followed by an increased thermospheric CO2 density observed with SPICAV during the same period. This density enhancement is partly predicted by GCM models. [less ▲]

Detailed reference viewed: 8 (2 ULg)
Peer Reviewed
See detailWords of thieves
Winand, Jean ULg

Conference (2009, September 15)

Detailed reference viewed: 15 (1 ULg)
Peer Reviewed
See detailScribal Variation across Textsorten and Time. A Case-Study: Amennakhte son of Ipwy
Polis, Stéphane ULg

Conference (2009, September 15)

Detailed reference viewed: 9 (1 ULg)
See detailThe very busy auroral footprint of Ganymede
Grodent, Denis ULg; Bonfond, Bertrand ULg; Radioti, Aikaterini ULg et al

Conference (2009, September 13)

Detailed reference viewed: 1 (0 ULg)
Full Text
Peer Reviewed
See detailThe Future of Belgian Federalism through the Eyes of the Citizens
Reuchamps, Min ULg

Conference (2009, September 12)

The Future of Belgian Federalism is definitely a hot topic in Belgian politics but also in citizens’ daily life. Indeed, citizens do talk about it and wonder – and sometimes try to predict – how the ... [more ▼]

The Future of Belgian Federalism is definitely a hot topic in Belgian politics but also in citizens’ daily life. Indeed, citizens do talk about it and wonder – and sometimes try to predict – how the future of Belgium will be. Yet, we only know their attitudes on this important topic through surveys either undertaken by the media or by social scientists. Thus far, no endeavour has been done to study thoroughly and qualitatively citizens’ preferences for the future of their country. In this paper, I propose to offer a first attempt of such an analysis relying on data collected in two small citizens’ panels about the future of Belgian federalism. These two deliberative events were held in Liege (French-speaking Belgium) in September 2007 and in Antwerp (Dutch-speaking Belgium) in October 2008 and gathered respectively 64 and 23 citizens from a variety of backgrounds. During one day, the participants talked about the future of Belgian federalism with fellow citizens in focus groups as well as with politicians and experts; in addition, they answered a pre- and a post-questionnaire. Following Max Weber’s advice to construct ideal type as a way to apprehend the reality and to foster comparisons, types of citizens are constructed on the basis of the data collected in Liège and in Antwerp. While four types of French-speaking are drawn from the former – the unitarist, the unionist, the federalist, and the regionalist –, five emerge from the latter – the unitarist, the unionist, the federalist, the regionalist, and the separatist/independentist. These different types are defined in terms of the citizens’ perceptions and preferences as well as the congruence that followed the learning and deliberative process that occurred throughout the panel. Above all, the types can be compared within the panel and between the panels. In this fashion the future of Belgian federalism can be explored through the eyes of the citizens. [less ▲]

Detailed reference viewed: 110 (12 ULg)
Full Text
Peer Reviewed
See detailElectronic Media and Political Knowledge among 16- to 21-year- old French-speaking Belgians
Fournier, Bernard ULg; Flaba, Elodie ULg

Conference (2009, September 12)

Few studies have looked at the Internet as a source of political knowledge, particularly in Belgium. In April 2009, a questionnaire distributed to 1000 young people between 16 and 21 years of age as well ... [more ▼]

Few studies have looked at the Internet as a source of political knowledge, particularly in Belgium. In April 2009, a questionnaire distributed to 1000 young people between 16 and 21 years of age as well as a citizen’s conference of another 100 young adults addressed various political issues (commitment, citizenship, participation and political interest) and measured, among other things, the impact of the Internet. This paper presents some of our preliminary findings: it confirms that the traditional idea of interest in politics is shared by one third of your sample, that the non-traditional views on politics is certainly higher, but we argue that the political use of the Web is limited to people already strongly interested in politics. [less ▲]

Detailed reference viewed: 52 (16 ULg)
See detailBehavioural impacts of gender stereotypes at adolescence
Gavray, Claire ULg

Conference (2009, September 11)

Detailed reference viewed: 18 (3 ULg)
Full Text
See detailWho are the Most Violent Young adolescents ?
Gavray, Claire ULg; vettenburg, Nicole

Conference (2009, September 10)

The paper considers social-demographic variables, such as the family and the school profile of the group of pupils ( school years 7, 8 and 9 in the ISRD- Belgium database) who are the most violent in our ... [more ▼]

The paper considers social-demographic variables, such as the family and the school profile of the group of pupils ( school years 7, 8 and 9 in the ISRD- Belgium database) who are the most violent in our sample. We will then compare them with the less violent offenders. Taking a gender perspective, we will examine the dynamic and significant factors related to both levels of violence in each gender group in order to analyze similarities and differences. For example, previous studies and analyses have shown that seriously violent behaviour is significantly related to early family victimization of girls, a hypothesis that will also be examined. (ISRD-Panel, no. 2) [less ▲]

Detailed reference viewed: 69 (13 ULg)
Full Text
Peer Reviewed
See detailLa carte mentale : une approche spécifique du comportement politique contemporain ?
Breux, Sandra; Reuchamps, Min ULg

Conference (2009, September 09)

If qualitative and quantitative approaches have frequently been opposed, the combination of both has also been praised. Nevertheless, few attempts, especially in the field of political science, have ... [more ▼]

If qualitative and quantitative approaches have frequently been opposed, the combination of both has also been praised. Nevertheless, few attempts, especially in the field of political science, have endeavoured to combine these two methodological approaches. Yet, a research tool seems to have the potential to break new ground in political science from both a qualitative and a quantitative perspective: the mental map. Often used in psychology (Piaget, 1987), and sometimes in geography (André et al., 1989; Fournand, 2003), political scientists have rarely used it (Laponce, 2001), however. On the basis of two empirical researches, one on Quebec City, the other one on federalism in Canada and Belgium, the aim of this paper is to discuss the pros and cons of the use of mental maps in the field of political science. Indeed, our purpose is to show that the mental map offers a contextual approach to understand individual as well as collective political behaviour, if the researcher follows strict methodological rules both in the implementation and in the analysis. [less ▲]

Detailed reference viewed: 254 (9 ULg)
Full Text
See detailEvaluating the Performance of Courts in France and Belgium : A Difficult Circle to Square
Ficet, Joël ULg

Conference (2009, September 09)

Detailed reference viewed: 30 (1 ULg)
Full Text
Peer Reviewed
See detailFormasup - La professionnalisation de nos enseignants en question(s)
Poumay, Marianne ULg; Georges, François ULg

Conference (2009, September 09)

L'article souhaite stimuler les échanges entre professionnels de la formation continuée des enseignants du supérieur. Il décrit brièvement le contexte du Master Complémentaire "Formasup" de l'Université ... [more ▼]

L'article souhaite stimuler les échanges entre professionnels de la formation continuée des enseignants du supérieur. Il décrit brièvement le contexte du Master Complémentaire "Formasup" de l'Université de Liège et les courants qui influencent sa mise en oeuvre. Il se centre ensuite sur la régulation constante de ce programme, tout d'abord en soulignant quelques questions qui restent problématiques pour l'équipe encadrante, puis en énumérant des aires de questionnement ainsi que des solutions, toujours provisoires, apportées au fil du temps. Il ouvre enfin sur les perspectives quelques nouveaux défis qui ne manqueront pas de bousculer ce programme dans les années qui viennent. [less ▲]

Detailed reference viewed: 138 (31 ULg)
See detailWealth Taxation: a survey
Pestieau, Pierre ULg

Conference (2009, September 09)

Detailed reference viewed: 12 (2 ULg)
Full Text
See detailLe(s) génocide(s) vu(s) par des jeunes
Grandjean, Geoffrey ULg

Conference (2009, September 07)

Cette communication présente des cartes mentales complétées par des adolescents belges francophones sur la thématique des génocides. Elle offre, par ailleurs, une présentation des enjeux mémoriels qui ... [more ▼]

Cette communication présente des cartes mentales complétées par des adolescents belges francophones sur la thématique des génocides. Elle offre, par ailleurs, une présentation des enjeux mémoriels qui peuvent résulter de la transmission des faits génocidaires en Belgique francophone. [less ▲]

Detailed reference viewed: 14 (1 ULg)
Full Text
See detailDe l’usage de la carte mentale en science politique : potentialités et limites d’un outil encore peu utilisé
Breux, Sandra; Reuchamps, Min ULg

Conference (2009, September 07)

In this communication, we reflect on the use of mental map in political science. This tool could be usefully employed in political science, if one follows some specific methodological guidelines.

Detailed reference viewed: 52 (0 ULg)
Full Text
See detail« Dessinez la Belgique » : une approche par carte mentale du fédéralisme belge
Flaba, Elodie ULg; Grandjean, Geoffrey ULg; Reuchamps, Min ULg et al

Conference (2009, September 07)

In this communication, we present the main results of the research "Draw Belgium" with a special focus on the mental maps.

Detailed reference viewed: 144 (23 ULg)
Full Text
See detailLes projets LIFE de restauration des biotopes tourbeux et des zones humides en Wallonie
Dufrêne, Marc ULg

Conference (2009, September 03)

Detailed reference viewed: 17 (1 ULg)
See detailQuelques réflexions sur les dénominations romanes de la framboise
Baiwir, Esther ULg

Conference (2009, September 03)

Detailed reference viewed: 10 (0 ULg)
Peer Reviewed
See detailBiodiversity Conservation and Mining : a Study Case of Ecosystem Reconstruction in Katanga (DRC)
Lebrun, Julie ULg; Seleck, Maxime ULg; Semereab, Ezana et al

Conference (2009, September 03)

The South of the Democratic Republic of Congo (Katanga) and adjoining regions in the North of Zambia comprise some of the largest ore bodies of cobalt and copper in the world. Katangan copper hills harbor ... [more ▼]

The South of the Democratic Republic of Congo (Katanga) and adjoining regions in the North of Zambia comprise some of the largest ore bodies of cobalt and copper in the world. Katangan copper hills harbor about 40 endemics as well as particular steppic plant communities. This Biological Diversity Action Plan (BDAP) is an activity program for the conservation of copper-cobalt flora and vegetation and mitigation of potential species extinction risk, during the early construction phase of the Tenke Fungurume Mining Corp. (TFM) project. Six potential taxa of concern (IUCN criteria) have been identified in the TFM concession. In situ conservation is fulfilled through the setting of a single large reserve. In parallel, important efforts have been devoted to ex-situ conservation strategy to re-establish vegetation and species after mining activities cessation. This includes: - Translocation of 3500 individuals of plants of concern to the nature reserve. - Ecosystem engineering with the reconstruction of an artificial copper/cobalt ecosystem. - Ex-situ seed bank with 300 seed samples (at least 50 seeds) collected belonging to 40 species and used for short and long term conservation, germination tests and micro-propagation tests. All these efforts represent an important step towards the conservation of copper-cobalt flora. [less ▲]

Detailed reference viewed: 165 (32 ULg)
Full Text
See detailLatitudinal - local time distribution of the O2 and OH infrared nightglows and O density in the Venus lower thermosphere
Soret, Lauriane ULg; Gérard, Jean-Claude ULg; Saglam, Adem et al

Conference (2009, September)

Atomic oxygen has been measured in situ only above 145 km on both the day and the night sides of Venus. Limb observations obtained with the Venus Infrared Thermal Imaging Spectrometer (VIRTIS) on board ... [more ▼]

Atomic oxygen has been measured in situ only above 145 km on both the day and the night sides of Venus. Limb observations obtained with the Venus Infrared Thermal Imaging Spectrometer (VIRTIS) on board Venus Express show that the O2 infrared nightglow peaks at ~97 km [1, 2], with a mean intensity value of about 1 MR. Yet, the distribution is largely inhomogeneous, with an enhanced region of ~3 MR statistically located near the midnight meridian at low latitude [3]. The oxygen density can be mapped using the O2 airglow and CO2 density vertical distributions [4]. The O2 vol-ume emission rates are obtained with an Abel inversion of the O2 limb profiles using CO2 vertical distributions taken from the Venus International Reference Atmosphere (VIRA) model. The results show that the O density peak varies in altitude with a mean value of 105 km. It ranges from 1.0x1010 to 14.5x1011 cm-3, with a mean value of 2.2x1011 cm-3. The zonally averaged peak altitude appears to be constant while its amplitude decreases with latitude. Another approach uses the O2 volume emission rates obtained with an Abel inversion of the O2 limb profiles. In-deed, it is then possible to vertically integrate these profiles to simulate nadir observations. The resulting map gives values between 0 and 2.8 MR (with a mean value of 0.6 MR) in the north hemisphere. A statistical map created with actual nadir observations shows intensities ranging from 0 to 2.1 MR, with a mean of 0.5 MR in the south hemisphere. A combination of the two types of observations could cover Venus entire nightside. Statistical mapping of the OH Meinel emission has also been performed using limb profiles. A strong correlation with the O2 emission is revealed. The average altitude of the emission peak is ~95.3 km for the OH(1-0) band and the average intensity is 0.4 MR [5]. [less ▲]

Detailed reference viewed: 30 (1 ULg)
Full Text
Peer Reviewed
See detailLa mesure des émissions gazeuses, et plus particulièrement des odeurs, comme outil de caractérisation de matériaux et de processus
Nicolas, Jacques ULg; Romain, Anne-Claude ULg; Degrave, Christophe et al

Conference (2009, September)

La qualité d'un matériau de construction, outre ses caractéristiques physiques, est fonction de son impact sur l'environnement intérieur. Ceci pousse de plus en plus les fabricants à proposer sur le ... [more ▼]

La qualité d'un matériau de construction, outre ses caractéristiques physiques, est fonction de son impact sur l'environnement intérieur. Ceci pousse de plus en plus les fabricants à proposer sur le marché des matériaux (dont les "bio-matériaux") dont les émissions atmosphériques demeurent dans des limites acceptables. Plusieurs initiatives, essentiellement volontaires, existent au niveau européen pour évaluer ces émissions. Un des objectifs de la directive européenne des produits de construction (CPD) est d'harmoniser les méthodes d'évaluation. La comparaison de 4 chambres d'émission, de tailles différentes, l'usage de méthodes d'évaluation physico-chimiques couplées à des méthodes sensitives de mesure des odeurs et l'utilisation de la technique des nez électroniques constituent l'originalité de la démarche du projet mené par l'université de Liège en collaboration avec deux autres institutions belges. Plus généralement, le nez électronique représente un outil particulièrement bien adapté au suivi d'ambiances gazeuses au cours du temps. L'odeur émise peut ainsi servir comme "variable de process" pour suivre en continu, voire contrôler, des processus utilisant la bio dégradation de produits, comme le compostage, la bio méthanisation ou le bio séchage. [less ▲]

Detailed reference viewed: 95 (19 ULg)
Full Text
Peer Reviewed
See detailPaleophytogeographic distribution of Devonian miospore assemblages
Breuer, Pierre; Steemans, Philippe ULg; Di Pasquo, Mercedes

Conference (2009, September)

Detailed reference viewed: 71 (5 ULg)
Full Text
Peer Reviewed
See detailLa recherche-action au sein des partenariats inter-organisationnels: l’entrepreneur institutionnel peut-il théoriser son propre travail d’institutionnalisation?
Xhauflair, Virginie ULg; Pichault, François ULg

Conference (2009, September)

Dans le contexte actuel de crise de la régulation sociale, la question de l’institutionnalisation de nouvelles formes de compromis est devenue centrale. Le niveau « local » est de plus en plus souvent ... [more ▼]

Dans le contexte actuel de crise de la régulation sociale, la question de l’institutionnalisation de nouvelles formes de compromis est devenue centrale. Le niveau « local » est de plus en plus souvent présenté comme l’un des leviers de la refondation de la régulation sociale. Cela implique de concevoir un nouveau cadre d’interaction entre les parties prenantes micro-économiques du marché du travail. Dans cette perspective, notre recherche s’est intéressée aux conditions d’institutionnalisation des compromis de conciliation entre besoins de flexibilité et de sécurité mis en œuvre au niveau inter-organisationnel. Nous avons adopté une approche de terrain, ancrée dans les pratiques de « flexicurité » mises en œuvre au niveau local. Pour ce faire, nous avons mobilisé, dans le cadre d’un projet de recherche-action européen, un partenariat composé des différentes parties prenantes du marché du travail de notre région. Avec leur collaboration, nous avons observé l’existant et nous avons testé de nouvelles pratiques, dans le cadre de projets pilotes, dont l’échec et/ou le succès (qualifiés en termes de « désirabilité » des compromis mis en œuvre) nous ont fourni des données riches et longitudinales. Devenus de véritables « entrepreneurs institutionnels » au travers de la stimulation et de l’accompagnement de ces expérimentations, nous avons co-construit avec nos partenaires « praticiens » une grille d’analyse des pratiques de flexicurité permettant de qualifier leur « désirabilité » et de guider la mise en œuvre de telles innovations. Nous avons ensuite réintégré le statut de chercheur, en transformant cette connaissance « locale » en une connaissance générique actionnable au travers d’un processus abductif établissant des liens entre notre propre théorisation et les connaissances existant dans le champ scientifique. [less ▲]

Detailed reference viewed: 256 (14 ULg)
See detailLie group vs. classical time integrators in multibody dynamics: Formulations and numerical benchmarks
Bruls, Olivier ULg; Cardona, Alberto

Conference (2009, September)

The dynamics of flexible multibody systems with large rotations is often described using large sets of index-3 differential-algebraic equations. In this context, the Lie group structure of the dynamic ... [more ▼]

The dynamics of flexible multibody systems with large rotations is often described using large sets of index-3 differential-algebraic equations. In this context, the Lie group structure of the dynamic system may be exploited in order to provide an elegant solution to the rotation parameterization problem. The talk discusses an original Lie-group extension of the classical generalized-alpha method, which can be used to solve index-3 differential-algebraic equations in multibody dynamics. Second-order accuracy is demonstrated at least in the unconstrained case and the performance is illustrated on several critical benchmarks with high rotational speeds. The remarkable simplicity of the new algorithms opens some interesting perspectives for real-time applications, model-based control and optimization of multibody systems. [less ▲]

Detailed reference viewed: 34 (0 ULg)
Full Text
Peer Reviewed
See detailProduction line real time near infrared (NIR) monitoring
Mantanus, Jérôme ULg; Ziemons, Eric ULg; Streel, Bruno et al

Conference (2009, September)

Detailed reference viewed: 55 (13 ULg)
See detailSAXS Data Analysis of Ordered and Disordered Morphologies With Gaussian Random Field Models
Gommes, Cédric ULg; Goderis, Bart

Conference (2009, September)

Detailed reference viewed: 3 (2 ULg)
See detailJupiter's ultraviolet polar auroral emissions
Coumans, Valérie ULg; Bonfond, Bertrand ULg; Grodent, Denis ULg et al

Conference (2009, September)

Not Available

Detailed reference viewed: 15 (6 ULg)
Full Text
See detailLes politologues dans le débat public
Jacquemain, Marc ULg

Conference (2009, September)

The paper shows how political analysts not only have the right to participate in public debates but also have a duty to do so. It also examines what are the conditions of separation between expert ... [more ▼]

The paper shows how political analysts not only have the right to participate in public debates but also have a duty to do so. It also examines what are the conditions of separation between expert attitude and commitment so that this freedom of speech does not degenerate into propaganda. [less ▲]

Detailed reference viewed: 33 (2 ULg)
Full Text
Peer Reviewed
See detailModèles intrapreneuriaux: une caractérisation exploratoire
Lisein, Olivier ULg; Degré, Julie ULg; Pichot, Michèle ULg

Conference (2009, September)

L’environnement économique et concurrentiel dans lequel s’insèrent désormais la plupart des entreprises étant de plus en plus turbulent, la question de l’innovation revêt une importance sans cesse plus ... [more ▼]

L’environnement économique et concurrentiel dans lequel s’insèrent désormais la plupart des entreprises étant de plus en plus turbulent, la question de l’innovation revêt une importance sans cesse plus cruciale. Dans ce cadre, l’intrapreneuriat apparaît constituer une véritable opportunité de renouveler l’innovation stratégique au travers d’une optique novatrice. Assimilé à "la mise en œuvre d’une innovation par un employé, un groupe d’employés ou tout individu travaillant sous le contrôle de l’entreprise" (Carrier, 1993), l’intrapreneuriat consiste à mobiliser les idées et les compétences créatrices de tout ou partie des salariés en vue de concrétiser des innovations de nature variée: élargissement de la gamme de produits/services, investigation de nouveaux marchés, refonte de processus de travail, etc. Toutefois, alors qu’il est reconnu comme étant un vecteur potentiel d’innovations stratégiques pour les entreprises capables de s’en saisir, et qu’il est d’ailleurs à cette fin fortement valorisé par certaines firmes, l’intrapreneuriat reste encore un concept relativement méconnu. Peu de choses semblent aujourd’hui validées empiriquement dans la littérature sur ses éléments constitutifs, sur les dispositifs intrapreneuriaux ciblés par les entreprises ainsi que sur les facteurs susceptibles de favoriser de tels comportements d’intrapreneurs. Notre communication entend répondre en partie à ces manquements, en proposant une réflexion empirique axée sur la façon dont les entreprises perçoivent et mobilisent l’intrapreneuriat dans leur stratégie. Elaborée à partir d’une démarche exploratoire reposant sur dix-sept études de cas d’entreprises réputées recourir à l’intrapreneuriat, notre réflexion poursuit un double objectif complémentaire: cerner la nature intrinsèque des stratégies intrapreneuriales développées par les entreprises au travers de différentes dimensions et, ce faisant, appréhender les déterminants organisationnels et RH qui y sont liés. [less ▲]

Detailed reference viewed: 114 (33 ULg)
Full Text
Peer Reviewed
See detailConformity in Landscape: a theoretical approach and the Attert Valley Nature Park case study, Belgium
Schmitz, Serge ULg

Conference (2009, September)

Maintaining or strengthening the value of the landscape is quite a new issue for the council boards of Walloon nature park. This issue was reinforced by the 2008 Walloon decree, which requires a landscape ... [more ▼]

Maintaining or strengthening the value of the landscape is quite a new issue for the council boards of Walloon nature park. This issue was reinforced by the 2008 Walloon decree, which requires a landscape charter to each nature park. This new topic poses the Park Council with the question of defining the type of landscape that should be in a nature park in Belgium. Two interesting viewpoints could be that of visual integrity and conformity. The paper questions the notion of “conformity” theoretically and empirically through the analysis of the Attert valley nature park (South Belgium). It analyzes more specifically the conformity with the natural environment and the economic context acknowledging the rule of the semiotic approach and of the management of landscape as an heritage. [less ▲]

Detailed reference viewed: 101 (50 ULg)
Full Text
Peer Reviewed
See detailLa coordination en ancien français: juxtaposition ou apposition «spécifiées»
Mazziotta, Nicolas ULg

Conference (2009, September)

La coordination en ancien français : juxtaposition ou apposition « spécifiées » 1.Cadre 2.Vers une définition 3.Le coordonnant comme « spécificateur » 4.La question des « zéros » 1 . Cette recherche se ... [more ▼]

La coordination en ancien français : juxtaposition ou apposition « spécifiées » 1.Cadre 2.Vers une définition 3.Le coordonnant comme « spécificateur » 4.La question des « zéros » 1 . Cette recherche se situe dans le cadre du nouveau projet Syntactic Reference Corpus of Medieval French (ANR/DFG), dont l'objectif est de fournir une annotation syntaxique consistante des relations de niveau propositionnel dans le corpus de la Base de Français Médiéval (Lyon) et le Nouveau Corpus d'Amsterdam (Stuttgart). Dans cette contribution, nous présenterons notre approche personnelle d'un problème de syntaxe particulier — le modèle du projet n'étant pas encore suffisamment abouti. L'utilisation de ces corpus implique deux conséquences : d'une part, notre première préoccupation sera l'adéquation de la description aux données (empirisme) ; d'autre part, notre argumentation portera sur l'ancien français. Malgré notre focalisation sur cette période particulière du français, les résultats de la recherche en syntaxe du français moderne et en linguistique générale nourriront notre réflexion, qui sera fondée sur des exemples concrets. 2. Nous commencerons par définir le terme coordination, en partant de son acception traditionnelle et en essayant de la rationnaliser. Les notions d'apposition et de juxtaposition seront également redéfinies, en prenant appuis sur les notions de coorientation et de coréférence, développées en linguistique générale par A. Lemaréchal (1997). Ces définitions rationnalisées nous permettront de reclasser certains faits de syntaxe généralement considérés comme des coordinations en leur refusant ce statut. 3. Nous réfléchirons ensuite sur la fonction syntaxique et la valeur sémantique du coordonnant. Nous montrerons comment la notion de spécification (Lemaréchal 1997, qui développe les vues de Tesnière ²1965) s'applique à ces morphèmes, qui apportent un surcroît de sens par rapport à une relation de juxtaposition ou d'apposition qui existerait sans qu'ils ne soient présents. Cette approche nous permettra de mettre en parallèle les coordonnants et les autres relateurs « analytiques » que sont les « prépositions » et les « conjonctions de subordination » et d'en souligner les points communs. Cette dernière mise au point nous permettra de décrire la coordination comme une juxtaposition ou une apposition spécifiées syntaxiquement et sémantiquement par le coordonnant. 4. Nous reprendrons alors la discussion sur la présence éventuelle de constituants « zéros » soulevée par des structures du type : aura li glise le deus et li voweiz le tierce (Liège 1244). À l'aide de l'observation de cas concrets, nous nous positionnerons dans ce débat en rejetant la présence de « zéros » (introduits dans l'analyse transformationnelle du problème, cf. Marcotte 1997), nous rangeant à l'avis de Chr. Touratier (2005), qui prône l'analyse des structures telles qu'elles sont observables. Cette question nous mènera à celle de la fonction des constituants coordonnés et du groupe qu'ils forment. [less ▲]

Detailed reference viewed: 189 (2 ULg)
Peer Reviewed
See detailMolecular phylogeography of the common dormouse, Muscardinus avellanarius, in Europe
Mouton, Alice ULg; Grill, Andrea; Krystufek, Boris et al

Conference (2009, September)

The common dormouse, Muscardinus avellanarius is naturally rare in Europe. Recently, natural scarcity has been exacerbated by anthropogenic environmental damages. This specie is now regarded as rare or ... [more ▼]

The common dormouse, Muscardinus avellanarius is naturally rare in Europe. Recently, natural scarcity has been exacerbated by anthropogenic environmental damages. This specie is now regarded as rare or endangered, attracting conservation related research and active habitat management to assist its survival. Furthermore, obligatory thermophilous species are probably more affected by cold phases than cold-tolerant organisms. The evolutionary history of the common dormouse would therefore show significant differences compared to other species. To better understand the genetic variation and structure of this species, we developed a phylogeographic study based on sequences of 700 base pairs of the mitochondrial DNA cytochrome b gene from 102 specimens collected throughout its palearctic distribution. The obtained dataset was analysed using different phylogenetic reconstruction as well as other methods adapted to phylogeography. The analysis of the mtDNA reveals a number of surprises. The results show two major genetic lineages: the first corresponding to the Western and Italian populations; the second comprising the Balkan and the Northern populations. Furthermore, the analyses tend to propose a scenario of multiple refugia in the Italian peninsula. This pattern of ‘refugia within-refugia’ has important implications in interpreting the distribution patterns of genetic diversity within the southern peninsulas. The Calabria region and Sicily could be “hot spots” of intraspecific biodiversity of Muscardinus avellanarius. These regions would thus deserve attention when deciding Evolutionary Significant Units (“ESU) for conservation of this species. [less ▲]

Detailed reference viewed: 73 (4 ULg)
Full Text
See detailNumerical simulation of heat transport associated with groundwater pumping in an alluvial aquifer
Fossoul, Frédérique ULg; Orban, Philippe ULg; Dassargues, Alain ULg

Conference (2009, September)

In a context more favourable to renewable energies, various aquifers are studied to feed heating and/or cooling systems. The groundwater flow and heat transport are modelled in the alluvial aquifer of the ... [more ▼]

In a context more favourable to renewable energies, various aquifers are studied to feed heating and/or cooling systems. The groundwater flow and heat transport are modelled in the alluvial aquifer of the river Meuse in order to provide an integrated tool for assessing the feasibility of a low energy air cooling /heating system for a large office building by pumping groundwater and discharging in the river. First, a comparative sensitivity analysis is performed using three different codes (MT3D, SHEMAT and HYDROGEOSHERE) for assessing the influence of coupling and non linearities in the main parameters due to the temperature evolution in function of time. Then, assuming that the variations of the aquifer temperature are weak enough to neglect their influence on hydrodynamics and thermal parameters, the MT3D and HYDROGEOSPHERE codes are used for modelling the actual case-study. In practice, for cooling the office building with groundwater initially at 13°C, the main influence of the relative hot water from the river Meuse (in hot summer conditions 27°C) is computed and constitutes the major limiting factor. An optimisation of the pumping schema is computed to maximise the efficiency of the cooling/heating system. [less ▲]

Detailed reference viewed: 89 (27 ULg)
Peer Reviewed
See detailPISA Student Non Response Adjustment Procedures
Rust, K.; Krawchuk, S.; Monseur, Christian ULg

Conference (2009, September)

Detailed reference viewed: 4 (0 ULg)
Full Text
See detailSensitivity in shape optimization of complex 3D geometries using level sets and non-conforming finite elements
Duysinx, Pierre ULg; Van Miegroet, Laurent ULg

Conference (2009, September)

For the last 20 years shape optimization has been stocking to penetrate industrial and real-life applications, whereas topology optimization was experiencing a fast growing soar and extensions to various ... [more ▼]

For the last 20 years shape optimization has been stocking to penetrate industrial and real-life applications, whereas topology optimization was experiencing a fast growing soar and extensions to various applications. By the way there is still a great interest in shape optimization because of the intrinsic capability of shape description to facilitate considering complex problems involving local stress and manufacturing constraints for instance. The level set description proposed by Osher and Sethian (1988) opened new perspectives to handle variable boundaries as in shape optimization. The implicit description of the geometrical entities allows for a more friendly and flexible manipulation of the geometry and overcome some restrictions related to the explicit approach of the geometry used in CAD systems: for example it is possible to reduce the topological complexity by removing or merging geometric entities (i.e. holes can merge or disappear) without degenerating the model, which was major restriction of shape optimization. A few years ago, the level set method was nicely complemented by the XFEM (eXtended Finite Element Method) proposed by Moes et al (1999). This approach greatly reduces the difficulty of considering time-variable boundaries and complex geometries by using non-conforming meshes. This is definitively an advantage to circumvent the so-called velocity field to carry out shape sensitivity and mesh relocation difficulties, especially with thin walled structures or 3D designs. The present research is continuing along and extending works by Duysinx et al (2006) and Van Miegroet and Duysinx (2007) to consider shape optimization based on a parametric level set description and XFEM. The work that is carried out in a common research project EFCONICO sponsored by the Walloon Region of Belgium aims at extending preliminary results 3 D structure and complex geometries, increasing the reliability of the method, enhancing the performances using advanced mesh generators as Gmsh, etc. In particular the paper presents new theoretical developments and their numerical implementation in sensitivity analysis with respect to parametric design variable of level sets. The developments are illustrated with numerical applications dealing with complex shape applications involving 3D geometries and the boundary conditions along design variable boundaries. [less ▲]

Detailed reference viewed: 124 (6 ULg)
See detailEnsemble smoother for optimizing tidal boundary conditions and bottom roughness by assimilation of High-Frequency Radar surface currents
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Staneva, J. et al

Conference (2009, September)

High-Frequency (HF) radars measure the ocean currents at various spatial and temporal scales. These include tidal currents, wind-driven circulation, density-driven circulation and Stokes drift. Sequential ... [more ▼]

High-Frequency (HF) radars measure the ocean currents at various spatial and temporal scales. These include tidal currents, wind-driven circulation, density-driven circulation and Stokes drift. Sequential assimilation methods updating the model state have been proven successful to correct the density-driven currents by assimilation of observations such as sea surface height, sea surface temperature and in-situ profiles. However, the situation is different for tides in coastal models since these are not generated within the domain, but are rather propagated inside the domain through the boundary conditions. For improving the modeled tidal variability it is therefore not sufficient to update the model state via data assimilation without updating the boundary conditions. The optimization of boundary conditions to match observations inside the domain is traditionally achieved through variational assimilation methods. In this work we present an ensemble smoother to improve the tidal boundary values so that the model represents more closely the observed currents. To create an ensemble of dynamically realistic boundary conditions, a cost function is formulated which is directly related to the probability of each perturbation. This cost function ensures that the perturbations are spatially smooth and that the structure of the perturbations satisfies approximately the harmonic linearized shallow water equations. Based on those perturbations an ensemble simulation is carried out using the full three-dimension General Estuarine Ocean Model (GETM). Optimized boundary values are obtained using all observations within the assimilation period using the covariances of the ensemble simulation. [less ▲]

Detailed reference viewed: 48 (10 ULg)
Peer Reviewed
See detailComparison of transport in lysimeters with undisturbed loamy sand and silty soil using non-invasive imaging with electrical resistivity tomography
Garré, Sarah ULg; Koestel, Johannes; Javaux, Mathieu et al

Conference (2009, September)

Detailed reference viewed: 17 (2 ULg)
See detailHF radar observations of surface currents in the German Bight: descriptive analysis, model-data comparison and non-sequential ensemble data assimilation
Port, A.; Staneva, J.; Schulz-Stellenfleth, J. et al

Conference (2009, September)

Detailed reference viewed: 43 (2 ULg)
Peer Reviewed
See detailHow can we predict difficulty in PISA reading items ? The process of describing item difficulty
Lumley, T.; Mendelovits, J.; Searle, D. et al

Conference (2009, September)

Detailed reference viewed: 11 (2 ULg)
See detailGuilt and Responsibility in Restorative Justice and Criminal Justice
Lauwaert, Katrien ULg

Conference (2009, September)

Detailed reference viewed: 3 (0 ULg)
Full Text
See detailIGCP 580 - Magnetic susceptibility, correlations and palaeoenvironment.
Da Silva, Anne-Christine ULg; Whalen, Michael; Hladil, Jindrich et al

Conference (2009, September)

Detailed reference viewed: 15 (2 ULg)
See detailDetection of High molecular mass for MALDI Imaging and Profiling
Franck, Julien; Longuespée, Rémi ULg

Conference (2009, September)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailDoes Social Innovation vary with the Organisational Form? Exploring the Diversity of Fair Trade Social Enterprises in Europe
Huybrechts, Benjamin ULg

Conference (2009, September)

A common view in the literature on social entrepreneurship and social enterprise is to highlight the fact that social innovation crosses the organizational forms. But does that social innovation should be ... [more ▼]

A common view in the literature on social entrepreneurship and social enterprise is to highlight the fact that social innovation crosses the organizational forms. But does that social innovation should be considered regardless of the organizational form? Fair Trade (FT) offers a quite interesting example of both a social innovation and a field in which diverse organizational forms coexist. My research questions are twofold: (1) what are the different types of organizational forms that underlie social innovation in the FT sector?; (2) do these different forms bring different types of social innovation? The methodology consists of interviews with the leaders of 57 Fair Trade Social Enterprises (FTSEs) in four European regions: Belgium, France (Rhône-Alpes), United Kingdom (England) and Italy (Rome). The findings show that the legal forms and governance models–the two elements of the organizational form considered here–can be combined into five categories of organizational forms: individual, manager-owned business, volunteer-based, multi-stakeholder cooperative and group. These categories seem to be linked, at least to a certain extent, to the age of the FTSE and to its goals. Certain forms seem to signal a particular type of social innovation. Volunteer-based FTSEs use education and advocacy as the main channel to pursue social change at the global level, and see the partnerships with the producers in the South as a vehicle to support the former goal. Individual and business-form FTSEs focus on offering benefits to the producers through a profitable commercial activity. And multi-stakeholder cooperatives and groups generally seek to combine both types of social innovation. However, nuances exist and lead to considering the organisational form as vehicles that may serve various purposes according to the context and the entrepreneurs’ profiles. I suggest three theoretical frameworks to interpret the diversity of organizational forms and its link with the logics of social innovation. Neo-institutional economics allow to see organizational diversity as the result of the production of different types of goods within the “FT bundle”. New institutionalism in organizational analysis emphasizes organizational diversity as the result of either weak (or non-existent) or multiple institutional logics. And institutional entrepreneurship highlights the ability of FTSEs to shape the environment in a way that legitimizes their own way of conceiving social innovation. I conclude that these three frameworks offer complementary explanations to organizational diversity and that the latter is an asset rather than an obstacle for carrying social innovation in multiple and complementary ways. [less ▲]

Detailed reference viewed: 129 (10 ULg)
Full Text
Peer Reviewed
See detailEco-ethological aspects of two natural hybrids involving Abramis brama (L.), of the River Meuse basin (Belgium) and implications in ecosystem management.
Nzau Matondo, Billy ULg; Ovidio, Michaël ULg; Philippart, Jean-Claude ULg et al

Conference (2009, September)

Eco-ethology as expressed in migration patterns, hybridisation level, growth rates in river conditions, and reproductive behaviour in a controlled environment were investigated in natural common bream ... [more ▼]

Eco-ethology as expressed in migration patterns, hybridisation level, growth rates in river conditions, and reproductive behaviour in a controlled environment were investigated in natural common bream Abramis brama × roach Rutilus rutilus and common bream × silver bream Blicca bjoerkna hybrids. From 2001 to 2003, hybrids and parental species were captured in a fish pass trap at the Lixhe dam on the Belgian Meuse River during their reproductive migration. The fish pass was checked 3 days a week and the water temperature was recorded hourly. The results showed that these hybrids were less frequent but they had migrated during the same period and in the same environmental conditions as the parental species. Scale readings showed that the growth of hybrids was intermediate between the two parent species’ growth. In controlled environments, the female hybrid mated with one to two males, including male hybrids, in reproductive experiments between hybrids; they also mated with male hybrid and male roach or male silver bream, but without the male common bream in reproductive experiments with hybrids mixed with parental species males, in a succession of spawning episodes recognised in parental species. Aggressive and territorial acts were observed among the males of these hybrids in a territory including a spawning substrate. This study has proven that these natural hybrids are eco-ethologically viable. For the management of fish populations and aquatic environments, the hybridisation process can be considered an indicator of habitat degradation. This degradation can then be interrupted by preserving spawning sites, controlling the restocking and species introduction, restoring habitats, and preserving the obstruction of fish migration. [less ▲]

Detailed reference viewed: 36 (4 ULg)
Full Text
Peer Reviewed
See detailInvariant games
Duchêne, Eric; Rigo, Michel ULg

Conference (2009, September)

In the context of 2-player removal games, we define the notion of invariant game for which each allowed move is independent of the position it is played from. We present a family of invariant games which ... [more ▼]

In the context of 2-player removal games, we define the notion of invariant game for which each allowed move is independent of the position it is played from. We present a family of invariant games which are variations of Wythoff's game. The set of P-positions of these games are given by a pair of complementary Beatty sequences related to the irrational quadratic number $\alpha_k = (1; \overline{1, k})$. We also provide a recursive characterization of this set. [less ▲]

Detailed reference viewed: 34 (7 ULg)
Peer Reviewed
See detailTheoretical Study on the Thermodynamic Properties of Al2O3 and Si3N4 at High Pressure
Xu, Bin ULg; Dong, Jianjun

Conference (2009, September)

Detailed reference viewed: 6 (2 ULg)
See detailOceanic CO2 sink : the contribution of the marine cryosphere
Delille, Bruno ULg; Vancoppenolle, M.; Tilbrook, B. et al

Conference (2009, September)

Detailed reference viewed: 9 (0 ULg)
See detailCharacterization of nanometer-scale roughness in SBA-15 mesoporous silica using image analysis of electron tomograms
Friedrich, Heiner; Gommes, Cédric ULg; de Jongh, Petra et al

Conference (2009, September)

Detailed reference viewed: 4 (0 ULg)
Peer Reviewed
See detailWorld Federation of Neurosurgical Societies
Martin, Didier ULg

Conference (2009, August 30)

Detailed reference viewed: 4 (0 ULg)
Full Text
See detailAssociations among BCS, milk production and days-open in Walloon primiparous dairy cows
Massart, Xavier; Laloux, Laurent; Bastin, Catherine ULg et al

Conference (2009, August 27)

Detailed reference viewed: 21 (7 ULg)
Full Text
See detailHet Leerdercorpus Nederlands in theorie en in de praktijk
Perrez, Julien ULg; Degand, Liesbeth

Conference (2009, August 24)

Detailed reference viewed: 17 (0 ULg)
See detailThe Danish Model: The case of partnership dissolution in cross national comparison
Gavray, Claire ULg; bould, sally; Schmaus, Gunther

Conference (2009, August 21)

Detailed reference viewed: 21 (3 ULg)
Peer Reviewed
See detailStakeholders’ involvement as a social construct process, A use of the Actor Network Theory
El Abboubi, Manal ULg; Cornet, Annie ULg

Conference (2009, August 11)

We address the question of how organisations can gain the involvement of their stakeholders in CSR certifications projects. Applying the stakeholder theory and the actor network theory, we conceptualize ... [more ▼]

We address the question of how organisations can gain the involvement of their stakeholders in CSR certifications projects. Applying the stakeholder theory and the actor network theory, we conceptualize stakeholder involvement in the certification process of a diversity label. We also delineate the potential of our framework for future managerial applications. [less ▲]

Detailed reference viewed: 78 (13 ULg)
See detailVolition and planned behaviour theory: How to fill the gap between intention and performance?
Broonen, Jean-Paul ULg

Conference (2009, August 06)

This study evaluated the contribution of implementation intentions over the constructs of the theory of planned behaviour (TPB) in testing a confirmatory model explaining the relationships between ... [more ▼]

This study evaluated the contribution of implementation intentions over the constructs of the theory of planned behaviour (TPB) in testing a confirmatory model explaining the relationships between antecedents of academic achievement for university students. It was found that the effects of intention to perform and its classic antecedents on exams performance were mediated by implementation intentions with a considerable increase of amount of explained variance above the contribution of the constructs of TPB. [less ▲]

Detailed reference viewed: 70 (5 ULg)
Full Text
Peer Reviewed
See detailAcademies of Science in 18th-Century Europe and the Application of Scientific Methods on Exploration. A Comparative Study.
Vandersmissen, Jan ULg

Conference (2009, August 01)

In the 18th century, exploration witnesses a growing tendency towards a systemization of the observation and registration of scientific data overseas. Explorers come under the influence of scientists who ... [more ▼]

In the 18th century, exploration witnesses a growing tendency towards a systemization of the observation and registration of scientific data overseas. Explorers come under the influence of scientists who want to intervene in the practice of scientific travelling by formulating specific guidelines for field investigation. These scientists themselves are subject of the growing demand of central state governments for verified knowledge on the utility of new discoveries in the field of geography and natural history. Exploration enters a new phase in its development and becomes the instrument of a utilitarian state directed scientific policy. Each of the imperial powers of Europe has an Academy of science or a learned society that plays a crucial role in this development. Nonetheless, we witness some remarkable differences in approach between these nations and hence between these learned societies. In this paper I make a comparative analysis of the instruction texts addressed to explorers by the Academies of science of 18th-century Europe, from the Parisian Académie royale des Sciences to the Royal Society of London and the Imperial Academy of Sciences in Saint Petersburg. [less ▲]

Detailed reference viewed: 13 (1 ULg)
Full Text
See detailGeometric Study of Mixed-integer Sets from Two Rows of Two Adjacent Simplex Bases
Louveaux, Quentin ULg

Conference (2009, August)

We generalize the study of sets arising from two rows of a simplex tableau by considering bounds on the nonbasic variables. We show that new classes of facets arise that cannot be obtained from triangles ... [more ▼]

We generalize the study of sets arising from two rows of a simplex tableau by considering bounds on the nonbasic variables. We show that new classes of facets arise that cannot be obtained from triangles and quadrilaterals. Specifically, when exactly one upper bound on a non-basic variable is introduced, inequalities that can be derived from pentagons involving up to six variables also appear. [less ▲]

Detailed reference viewed: 17 (0 ULg)
Full Text
Peer Reviewed
See detailTransfer of heroin profiling method from conventional GC-MS to Fast-GC-MS and UHPLC-MS/MS
Debrus, Benjamin ULg; Broséus, Julian; Guillarme, Davy et al

Conference (2009, August)

Detailed reference viewed: 34 (5 ULg)
Full Text
See detailGenetic evaluation considering phenotypic data and limited molecular information using a novel equivalent model: Case study using effect of the mh locus on milk production in the dual-purpose Belgian Blue breed
Colinet, Frédéric ULg; Gengler, Nicolas ULg

Conference (2009, August)

The introduction of molecular information into genetic evaluation systems is currently under research. Based on an equivalent method, we developed from existing theory a new alternative strategy for the ... [more ▼]

The introduction of molecular information into genetic evaluation systems is currently under research. Based on an equivalent method, we developed from existing theory a new alternative strategy for the prediction of gene effects and especially their smooth integration into genetic evaluations. Underlying hypothesis were based on the idea that knowledge of genotypes will not affect overall additive genetic variance but only change expected values of genetic effects for animals with known genotypes. However, all animals could not be genotyped. Thus, the developed equations were modified to allow the integration of the known genotype for a portion of the population. This strategy was tested for the mh locus (responsible for the double-muscling phenotype) in dual-purpose Belgian Blue cattle. The genotype was determined for 123 bulls and 1940 cows (+/+ 19.5, mh/+ 39.3 and mh/mh 41.2%). These animals had 11,150 daughters with test-day (TD) records. The genotypes were incorporated into a modified genetic evaluation based on the current routine multi-trait multibreed test-day model used in the Walloon Region (Belgium). Data used included 12,829,309 TD records for 689,057 dairy cows in production. The pedigree file contained 1,606,024 animals (cows with TD records and ancestors). Computation of the modified mixed model equations was done solving iteratively two systems of equations, one for the polygenic effects and one for the gene effect until the relative differences in the gene solutions were below 10-5. A linear extrapolation was also used to speed up the convergence of gene effects. As expected, the mh locus exerts negative effects on milk production traits. For the first three lactations, the average estimated allelic substitution effects were -158.7 kg milk, -8.93 kg fat and -5.64 kg protein per lactation (305 days). [less ▲]

Detailed reference viewed: 18 (11 ULg)
See detailEntanglement of random localized and multifractal states
Martin, John ULg; Giraud, Olivier; Georgeot, Bertrand

Conference (2009, August)

Detailed reference viewed: 5 (0 ULg)
Peer Reviewed
See detailBiting midges (Ceratopogonidae: Culicoïdes) in Belgium: a comparison between indoor and outdoor trapping in cattle and sheep farms.
Losson, Bertrand ULg; Robert, Nancy ULg; Paternostre, Julien ULg et al

Conference (2009, August)

Bluetongue, a vector born disease of ruminants, was identified for the first time in Northern Europe in 2006. The vectors are insects of the family Ceratopogonidae, genus Culicoides. In Belgium, no recent ... [more ▼]

Bluetongue, a vector born disease of ruminants, was identified for the first time in Northern Europe in 2006. The vectors are insects of the family Ceratopogonidae, genus Culicoides. In Belgium, no recent data were available about the biology of these insects including their feeding habits and behaviour. The present study was carried out in order to evaluate the indoor and outdoor activity of these Diptera in 5 different cattle or sheep farms in 2008. Two sheep and 3 cattle farms were selected in the Province of Luxembourg, Belgium. In each farm 2 Onderstepoort Veterinary Institute (OVI) traps were installed respectively inside and outside the animal accommodation. Trapping was carried out twice a week from 17:00 until 24:00.The collecting vials were replaced every hour. A portable suction trap (BackTrap® U.S.A) was used twice on each visit to collect midges on the animals. In each farm the study was carried out for 6 successive weeks, 2 farms being monitored together. The study began on July 28th and ended on November 30th 2008. A total of 2591 culicoides were trapped. A majority of those (88.76%) were trapped indoors whereas 10.03% were trapped outdoors and 1.21% directly on the animals. The ambient temperature had a marked effect very few culicoides being trapped below 13°C. Three main species or species complex were identified both indoors and outdoors: C. obsoletus/scoticus, C. dewulfi, C. chiopterus. They represented 98.93% and 85.03% indoors and outdoors respectively. On the animals only C. obsoletus/scoticus and C. dewulfi were found. [less ▲]

Detailed reference viewed: 153 (49 ULg)
Full Text
Peer Reviewed
See detailDo Higher Education syllabi and oral course introduction affect student’s motivation to study ? Measuring the impact of syllabi from specifically trained Faculties on students’ perceptions of controllability, course value and competency
Leduc, Laurent ULg

Conference (2009, August)

As defined by Altman and Cashin (1992), “the primary purpose of a syllabus is to communicate to one’s students what the course is about, why the course is taught, where it is going, and what will be ... [more ▼]

As defined by Altman and Cashin (1992), “the primary purpose of a syllabus is to communicate to one’s students what the course is about, why the course is taught, where it is going, and what will be required of the students for them to complete the course with a passing grade”. According to several authors, one of the functions of the syllabus is to motivate students: it “conveys enthusiasm for the subject and sparks student interest and motivation” (Hammons & Shock, 1994), “warm syllabi explain expectations in a clear and friendly fashion, encourage and motivate students” (Slattery & Carlson, 2005), “the course syllabus should generate interest and motivate students to take responsability to learn the contents of the course” (Johnson, 2006), “we studied teachers who have enormous success in helping and encouraging their students to achieve remarkable learning and found they usually produce a certain kind of syllabus” (Bain, 2004). Some researchers (Thompson, 2007) have also pointed out different oral strategies used by teachers when presenting their courses for the first time to students in order to positively affect them on this aspect. But the question is: can this very early written / oral transmission of information really impact students’motivation for learning in some courses? In the University of Liège, professors have to submit every year for each of their courses a one page (at least) standardized syllabus (called engagement pédagogique). In addition, they usually start their first lesson with introductory speeches that plays the same role. In 2008, IFRES (Institute for Training and Research in Higher Education) has delivered pedagogical training and guidelines to new faculties in order to promote these two kinds of motivating communications especially with their freshmen and sophomores audiences. As the person in charge with that training, I focused on Viau’s model of motivation dynamics (1997). The specific suggestions I gave consisted in taking into account various kinds of students’ perceptions (1) of competency (“a perception that a student has about him(her)self and through which he/she assesses his/her ability to suitably accomplish an activity that he/she is not sure to carry off”), (2) of controlability (“the perception of the control that a student has on the course of an activity and on its consequences”) and (3) of activities value (“the opinion that a student expresses on the interest and the usefulness of a pedagocical activiy according to the goals he/she pursues”) in one’s written and oral communication with students about pedagogical and practical aspects of a course. At the beginning of the academic year following the delivery of those guidelines and training sessions, the wording of syllabi and oral speeches produced by 10 of those new faculties was analysed from their motivational potential’s point of view. In the same time, questionnaires were submitted to the 1400 students of their 12 introductory courses, in order to investigate the corollary impact of those information transmissions on learners’ motivational dynamics. Before and after their reception of the oral and written messages from their respective teachers, student’s levels of perception concerning the value of the course, concerning their own competency to succeed in it and concerning their controlability, have been compared in order to measure hypothetical gains due to syllabi and face-to-face course introduction. We have studied relations between students who have actualy read / not read syllabi, or who have actually listened / not listened to oral presentation of the course, and their level of perception of Viau’s three motivational factors. Other relations between variables like students’ perceptions of their own teacher (resulting from the content and tone of his/her messages) or the presence / absence of a rationale for some particular items of information have also been studied. [less ▲]

Detailed reference viewed: 38 (1 ULg)
Peer Reviewed
See detailAphid-ant mutualism: How do aphids focus ant foraging?
Verheggen, François ULg; Detrain, Claire; Diez, Lise et al

Conference (2009, August)

The mutualistic relationships that occur between myrmecophilous aphids and ants are based on the rich food supply that honeydew represents for ants and on the protection they provide against aphid natural ... [more ▼]

The mutualistic relationships that occur between myrmecophilous aphids and ants are based on the rich food supply that honeydew represents for ants and on the protection they provide against aphid natural enemies. While aphid predators and parasitoids actively forage for oviposition sites by using aphid semiochemicals, scouts of aphid-tending ant species would also benefit from locating honeydew resources by orienting toward aphid pheromone sources. The present study aims to identify the chemical factors that attract ants and that maintain their mutualistic relationships with aphids. The perception and behavioral impact of Aphis fabae alarm pheromone, namely (E)-β-farnesene, on Lasius niger were firstly investigated using electroantennography and a four-arm olfactometer. Aphis fabae honeydew sugar composition was subsequently analyzed while the foraging and recruiting behaviour of L. niger scouts towards each of the identified sugars was studied. Clear electrical depolarisations were observed from L. niger scout antennae to stimulations of A. fabae alarm pheromone. Scouts were significantly attracted toward (E)-β-farnesene in the four-arm olfactometer, suggesting for the first time that the latter compound is a key chemical in the establishment of the mutualism. Aphis fabae honeydew consisted of 9 identified mono-, di- and tri-saccharides and 8 hydrocarbons that could not be identified. The main identified sugars were sucrose, fructose, glucose and melezitose. L. niger scouts showed the following drinking preferences for the tested sugars: melezitose = sucrose = raffinose > glucose = fructose > maltose = trehalose = melibiose = xylose, with a recruitment launched toward the first three sugars. Therefore, ant scouts may use aphid semiochemicals to locate at distance an aphid colony and subsequently estimate honeydew quality by tasting it before recruiting conspecifics and establishing a mutualistic relationship. [less ▲]

Detailed reference viewed: 154 (12 ULg)
See detailAurora at Earth, Jupiter and Saturn: a comparative view
Gérard, Jean-Claude ULg

Conference (2009, August)

The interaction of the solar wind with the magnetospheres of the giant planets is different from that with the terrestrial magnetosphere in several respects bearing consequences on the morphology and ... [more ▼]

The interaction of the solar wind with the magnetospheres of the giant planets is different from that with the terrestrial magnetosphere in several respects bearing consequences on the morphology and dynamics of the aurora: - the magnetospheres of the outer planets are dominated by the planetary rotation that can provide much of the energy for the processes acting within these magnetospheres. - the circulation of plasma may be driven by mass loading of the giant magnetospheres by moons and rings rather than by reconnection with the IMF. - the magnitude and orientation of the interplanetary magnetic field plays a key role in controlling the Earth’s auroral dynamics whereas the solar wind dynamic pressure appears as a key factor in triggering auroral intensification on Saturn. - The combination of imaging and spectral techniques indicates the characteristic energy of the auroral electrons is comparable on Earth and Saturn, but higher energies are associated with the Jovian aurora. As a consequence, Jupiter’s aurora appears relatively shielded from solar wind influences, except inside the auroral oval where transient bright emission has been observed following sudden compressions of the magnetosphere. The size and brightness of the main oval shows only a week dependence on solar wind conditions. By contrast, Saturn’s aurora is quite responsive to solar wind perturbations, as was observed during campaigns of concurrent observations between HST and Cassini. Auroral intensification events that are reminiscent of shock-induced Earth aurora appear to be triggered by sudden increases of the solar dynamic pressure more than by changes in the IMF orientation. However, simultaneous HST-Cassini observations indicate that localised auroral brightenings and ENA acceleration events may be observed under quiet solar wind conditions. The occurrence of substorms is a key characteristics of the Earth’s auroral dynamics. Localized auroral enhancements have also been observed on Jupiter and Saturn. They have been associated to reconnection events causing events similar to substorms. [less ▲]

Detailed reference viewed: 19 (1 ULg)
Full Text
See detailExpressing female fertility in the Walloon region of Belgium: how to do?
Vanderick, Sylvie ULg; Bastin, Catherine ULg; Gengler, Nicolas ULg

Conference (2009, August)

Since September 2007, the Walloon Region of Belgium has used a genetic evaluation system for pregnancy rate in Holsteins and has participated in 3 of the 5 MACE trait INTERBULL runs for female fertility ... [more ▼]

Since September 2007, the Walloon Region of Belgium has used a genetic evaluation system for pregnancy rate in Holsteins and has participated in 3 of the 5 MACE trait INTERBULL runs for female fertility. In order to define general way of female fertility expression, a principal component analysis was carried out on six published foreign female fertility indexes. Results of were used to compute a direct female fertility index with the INTERBULL international female fertility proofs available on the Walloon scale. An indirect female fertility index was also developed in order to increase reliability of young bulls. Approximate procedure based on selection index was used to combine both indexes in an overall index called combined female fertility index. This index was highly correlated with the direct female fertility index (.96) and the first principal component (.85), therefore it was considered as good expression of female fertility. Moreover, this allowed recovering 4,019 INTERBULL bulls with a publishable female fertility index. [less ▲]

Detailed reference viewed: 11 (3 ULg)
Peer Reviewed
See detailIncidence of winter feeding, parasitism, and housing on the growth performances of dairy heifers in Wallonia.
Picron, Pascale ULg; Foridmont, Eric

Conference (2009, August)

With a replacement rate of 30 % in dairy herds, it is essential to ensure the best rearing conditions of young cattle for the development of future dairy cows. The aim of this study was to quantify the ... [more ▼]

With a replacement rate of 30 % in dairy herds, it is essential to ensure the best rearing conditions of young cattle for the development of future dairy cows. The aim of this study was to quantify the incidence of key management aspects such as housing, parasitism and winter feeding on growth performances of dairy heifers. Thirty farmers (774 heifers), located in the main dairy regions in Wallonia, participated to the survey. Development and growth were determined using Heart Girth (HG) measurements and compared with a French reference. Feed intake was estimated from the French Fill Unit System. A prediction equation of BW from HG, related to the genetic features of Walloon dairy herds (n = 256, BW = 0,0005 HG2.6161, r² = 0,96), was developed. The results suggested that 80 % of the breeders could pretend to an early calving, at 24 – 26 month of age. For half of the others, a lack of net energy supply in the diet could explain a growth delay. On the other hand, the protein supply was too high in 90 % of the diets compared to the animal’s requirement. This was due to the large utilization of grass silage. Ventilation efficiency, estimated by the difference of hygrometry inside and outside the barns, was not optimal in 40 % of the farms. This suggested that heifers were often accommodated in less adapted barns. The parasitism management did not differ fundamentally from one farm to another. Globally, heifers were treated systematically (1 to 4 treatments/year) and did not acquire a sufficient immunity at the end of the first grazing period (estimated by blood pepsinogen measurement). They should be treated again for the next grazing season. Knowing that the treatment cost varied between 5 and 21 € in drugs per heifer and per year, a better parasitism management in the future should improve the economical and ecological performance. [less ▲]

Detailed reference viewed: 13 (7 ULg)
See detailNews from outer worlds
Grodent, Denis ULg

Conference (2009, July 27)

Detailed reference viewed: 4 (0 ULg)
See detailThe morphology of equatorial electron beams at Io
Jacobsen, S.; Saur, J.; Neubauer, F. M. et al

Conference (2009, July 27)

Detailed reference viewed: 6 (1 ULg)
See detailHST observations of Europa's atmospheric UV emission
Saur, J.; Feldman, P. D.; Strobel, D. F. et al

Conference (2009, July 27)

Detailed reference viewed: 8 (2 ULg)
See detailThe variability of auroral emissions on Jupiter and Saturn
Clarke; Nichols; Gérard et al

Conference (2009, July 27)

Detailed reference viewed: 2 (0 ULg)
See detailSaturn Auroral Images and Movies from Cassini UVIS
Pryor, W. R.; Grodent, Denis ULg; Gérard, Jean-Claude ULg

Conference (2009, July 27)

Detailed reference viewed: 5 (2 ULg)