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See detailDeleuze on the revival of Bergson’s élan vital
Wong, Tai Tak Andy ULg

Conference (2011, June 28)

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See detailLie antialgebras
Kreusch, Marie ULg

Conference (2011, June 28)

Lie antialgebras which is a $\Z_2$-graded commutative algebra (but not associative) was introduced in 2007 by Valentin Ovsienko. This notion takes place in the superspaces theory studied since years in ... [more ▼]

Lie antialgebras which is a $\Z_2$-graded commutative algebra (but not associative) was introduced in 2007 by Valentin Ovsienko. This notion takes place in the superspaces theory studied since years in geometry. This algebra was discovered in the context of symplectic geometry. In a way, Lie antialgebras unify in a special meaning associative and commutative algebras. Since this is quite a new subject a lot of things have to be done in the understanding of this structure. At first, I am going to explain the notion of superspaces. Then I will speak about the origins of this structure and present what has already been discovered about this new 'type' of algebra (universal algebra, representations, modules, relation to superalgebra,...). After, I am going to give some important examples of Lie antialgebras related to some known structures. Finally, I am going to present what I am searching for the moment and the questions that I am trying to answer. [less ▲]

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See detailPMMA/carbon nanotube nanocomposites foams for EMI shielding application
Thomassin, Jean-Michel ULg; Molenberg, Isabel; Huynen, Isabelle et al

Conference (2011, June 27)

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See detailControl of hypertension in renal transplantation : the EPARA study
Gellner, Karen; SAINT-REMY, Annie ULg; WEEKERS, Laurent ULg et al

Conference (2011, June 26)

Blood pressure (BP) is a cardiovascular but also kidney disease risk factor, especially in high risk populations such as kidney transplantated one (KT). Therefore it must be accurately measured. The aim ... [more ▼]

Blood pressure (BP) is a cardiovascular but also kidney disease risk factor, especially in high risk populations such as kidney transplantated one (KT). Therefore it must be accurately measured. The aim of the current study was to evaluate the quality of BP control in such a population followed at the CHU Liège. [less ▲]

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See detailEmotion et psychiatrie, ou les chances de l'homme selon Francis Jeanson
Cormann, Grégory ULg

Conference (2011, June 25)

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See detailNative vitamin D in dialysis patients : safety and biological effects
WEEKERS, Laurent ULg; Warling, Xavier; Moonen, Martial et al

Conference (2011, June 25)

Native vitamine D (VTD) supplementation is recommended by the last KDIGO guidelines in CKD patients including dialysis patients. However, this recommendation is based on a low level of evidence. We ... [more ▼]

Native vitamine D (VTD) supplementation is recommended by the last KDIGO guidelines in CKD patients including dialysis patients. However, this recommendation is based on a low level of evidence. We designed a randomized double-blind prospective study comparing the effects of VTD and placebo in dialysis patients on mortality, vascular calcifications and different paremeters: 25-OH vitamine D- 25(OH)D -, parathormone (PTH), calcium and phosphorus. [less ▲]

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See detailJudicial Independence Conference
Sibony, Anne-Lise ULg

Conference (2011, June 24)

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See detailThe Parametrized Diastolic Filling Formalism: Application in the Asklepios Population
Claessens, Tom; Waheed Raja, Muhammad; Pironet, Antoine ULg et al

Conference (2011, June 24)

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See detailQuels horizons pour les répertoires de manuels scolaires ?
Jadoulle, Jean-Louis ULg

Conference (2011, June 24)

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See detailA plus d'un titre. Généalogie critique de la reine Albemarle
Cormann, Grégory ULg

Conference (2011, June 24)

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See detailWhat can we learn about strongly lensed quasars with microlensing ?
Sluse, Dominique ULg

Conference (2011, June 23)

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See detailThe alpha of a market timer
Hübner, Georges ULg

Conference (2011, June 23)

The Treynor and Mazuy framework is a widely used return-based model of market timing, but existing corrections of the regression intercept can be manipulated through derivatives trading. We propose an ... [more ▼]

The Treynor and Mazuy framework is a widely used return-based model of market timing, but existing corrections of the regression intercept can be manipulated through derivatives trading. We propose an adjustment based on Merton's option replication approach. The linear and quadratic coefficients of the regression are exploited to assess the cost of the replicating option that yields similar convexity for a passive portfolio. A similar reasoning applies for various timing patterns and in multi-factor models. Our empirical application shows that, unlike existing performance adjustment methods, the portfolio replication approach uncovers a positive link between the convexity and the performance of market timing funds. [less ▲]

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See detailInfluence de la vitesse de refroidissement sur le profil de contraintes résiduelles dans la céramique d’émaillage : mesures avec la méthode du trou incrémental
MAINJOT, Amélie ULg; Schajer, Gary; VAN HEUSDEN, Alain ULg et al

Conference (2011, June 23)

INTRODUCTION : La fabrication des couronnes et des bridges génère des contraintes résiduelles dans la céramique d’émaillage et dans l’infrastructure lors du procédé de refroidissement. Les contraintes ... [more ▼]

INTRODUCTION : La fabrication des couronnes et des bridges génère des contraintes résiduelles dans la céramique d’émaillage et dans l’infrastructure lors du procédé de refroidissement. Les contraintes résiduelles sont un facteur important qui contrôle le comportement mécanique des restaurations. La connaissance de la distribution des contraintes en fonction de la profondeur peut aider à comprendre les échecs, particulièrement le chipping, qui est une problématique répandue avec les prothèses à infrastructure en zircone yttrium. L’objectif de cette étude est d’analyser la variation du profil de contraintes dans la céramique d’émaillage sur infrastructure métal ou zircone, en fonction de la vitesse de refroidissement. METHODES : La méthode du trou incrémental, souvent utilisée en ingénierie industrielle, a été adaptée à pour être utilisée au niveau de la céramique d’émaillage 1. Le profil de contraintes a été mesuré dans des des disques de 20 mm de diamètre, comprenant une infrastructure de 0.7 mm d’épaisseur en métal ou en zircone yttrium, et une couche de céramique d’émaillage de 1.5 mm d’épaisseur. Trois procédures de refroidissement différentes ont été étudiées. RESULTATS: Il a été observé que l’amplitude des contraintes mesurées en surface de la céramique d’émaillage augmente avec la vitesse de refroidissement, alors que l’amplitude des contraintes en profondeur diminue. Des contraintes en compression ont été mesurées à la surface de tous les échantillons. En profondeur, des contraintes en compression ont été mesurées au niveau des échantillons à infrastructure métal et des contraintes en traction au niveau des échantillons à infrastructure zircone. DISCUSSION ET CONCLUSIONS : La vitesse de refroidissement influence l’amplitude des contraintes résiduelles. Celles-ci peuvent influencer le comportement mécanique des bicouches à infrastructure métal et zircone. La nature du matériau d’infrastructure influence la nature des contraintes en profondeur, les échantillons zircone montrant un profil de contraintes beaucoup plus défavorable que les échantillons métal. L’hypothèse de la transformation de phase de la zircone est mise en avant pour expliquer ce comportement. REFERENCES : ¬¬¬¬¬¬¬1 Mainjot, A., et al. (2011) Dental Materials 27 : 437-444. Fig 1 Profil de contraintes dans l’émaillage des échantillons zircone. CC= Classic Cooling, MC= Modified Cooling, SC= Slow Cooling. [less ▲]

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See detailDevelopment and validation of situational judgment tests for evaluating Organizational Citizenship Behavior and Contextual Performance Behavior in a professional context : methodological issues.
Lothe, Benoit ULg; Hansez, Isabelle ULg

Conference (2011, June 22)

Strategic Human Resource Management typically raises appraisal issues (Analoui, 2007; Jackson, Schuler & Werner, 2009 ; Teo & Crawford, 2005) mostly related to the HRM relationship with organizational ... [more ▼]

Strategic Human Resource Management typically raises appraisal issues (Analoui, 2007; Jackson, Schuler & Werner, 2009 ; Teo & Crawford, 2005) mostly related to the HRM relationship with organizational performance (Bowen & Ostroff, 2004 ; Cascio, 1996 ; Wright, Gardner, Moynihan & Allen, 2005). Hence workforce assessment remains a key success factor for many organizations. Thus this paper takes place in the early beginning of a PhD Thesis which aims to the development and validation of an assessment test of Organizational Citizenship Behavior (OCB) and Contextual Performance (CP) in a professional selection context. The managerial concept of OCB refers to “individual behavior that is discretionary, not directly or explicitly recognized by the formal reward system, and in the aggregate promotes the efficient and effective functioning of the organization” (Organ, Podsakoff & MacKenzie, 2006, p. 3). CP is a closely related construct, distinct of task performance, that encompasses behaviors supporting the psychological and social context in which task activities are performed (Stone-Romero, Alvarez, & Thompson, 2009). If these two frameworks look much alike, they contrast on several points: conceptual dimensions, discretional characteristics of behavior, etc. Therefore, it seems interesting to apprehend both commonly. Situational Judgment Tests (SJTs) show a good validity concerning prediction of job performance in employment settings (Lievens, Peeters, Schollaert, 2008 ; Whetzel & McDaniel, 2009). Furthermore, they are a multidimentional measurement method suited to assess different construct like job knowlege and skills, applied social skills, and some basic personality tendencies (Christian, Edwards, & Bradley, 2010). Taking into account its characteristics, SJTs seem to be an appropriate method to enable OCB & CP evaluation. This communication pursues three goals. The first is a theoretical issue: we need a straightforward vision of OCB & CP concepts. Accordingly, after a consistent review on the vast amount of work that have been written on these two concepts, we have to specify what we seek to appraise and make the inventory of existing measurement tools related to these focus. We have already worked out a structured methodology to develop and validate SJTs in selection and career management context (Lothe, Hansez & Bertrand, Submitted). So the second issue is a methodological one. How to improve and/or to adapt this methodology in order to create a new SJT measuring OCB & CP ? Thirdly, some research related issues conclude this paper. Through this PhD project, we should be able to examine several main issues that will shape the thesis. Are SJTs being able to provide a valid assessment of OCB & CP in a personnel selection context ? Does the discretionary nature of one behavior impact the quality of its measurement ? What is the effect of response instructions on OCB/CP situational judgment test performance ? Each issue will be illustrated and discussed in connection with the development and validation opportunities and constraints. [less ▲]

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See detailAttraction of wireworms to root-emitted volatile organic compounds of barley
Barsics, Fanny ULg; Haubruge, Eric ULg; Verheggen, François ULg

Conference (2011, June 20)

The ability of wireworms (Agriotes sordidus Illiger) to orientate towards a blend of volatiles emitted by chopped roots of barley was tested. During individual tests, the larvae chose between the two ... [more ▼]

The ability of wireworms (Agriotes sordidus Illiger) to orientate towards a blend of volatiles emitted by chopped roots of barley was tested. During individual tests, the larvae chose between the two sides of a Y-shaped olfactometer. One side was connected to a chamber containing the chopped roots and the other was connected to an empty chamber. Wireworms chose significantly more often the side of the olfactometer providing the blend of root volatiles. This result underlines the importance of the identification of these compounds and their role assessment alone or combined, as for their effect on wireworms. Such compounds could be used in IPM strategies. [less ▲]

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See detailLong-term biogeochemical effects of adding alkalinity into the ocean
Ilyina, Tatiana; Wolf-Gladrow, Dieter; Munhoven, Guy ULg et al

Conference (2011, June 20)

Large-scale perturbations in seawater chemistry brought about by the oceanic uptake of anthropogenic CO2 will go on long after emissions decline or stop. Several geo-engineering approaches have been ... [more ▼]

Large-scale perturbations in seawater chemistry brought about by the oceanic uptake of anthropogenic CO2 will go on long after emissions decline or stop. Several geo-engineering approaches have been suggested to reduce atmospheric CO2 concentrations and ocean acidification. One of them is to enhance weathering processes to remove atmospheric CO2. This method involves dissolving rocks (i.e. limestone, olivine) or adding strong bases (i.e. calcium hydroxide) to the upper ocean. The net effect of these two approaches is to increase ocean alkalinity, thereby increasing the oceanic capacity to take up and store anthropogenic CO2. Another effect of adding alkalinity would be to drive seawater to higher pH values and thus counteract the ongoing ocean acidification. However, whereas adding bases initially only alters alkalinity of seawater, dissolution of carbonates perturbs both, alkalinity and dissolved inorganic carbon budgets. Thus, on longer time scales, these two methods will likely have different biogeochemical effects in the ocean. Here we test enduring implications of the two approaches for the marine carbon cycle using the global ocean biogeochemical model HAMOCC which also includes marine sediments. In our model scenarios we add alkalinity in amounts proportional to fossil fuel emissions. We compare the long-term effectiveness of the two geo-engineering approaches to decrease atmospheric CO2. [less ▲]

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See detailLie antialgebras
Kreusch, Marie ULg

Conference (2011, June 20)

Lie antialgebras which is a $\Z_2$-graded commutative algebra (but not associative) was introduced in 2007 by Valentin Ovsienko. This notion takes place in the superspaces theory studied since years in ... [more ▼]

Lie antialgebras which is a $\Z_2$-graded commutative algebra (but not associative) was introduced in 2007 by Valentin Ovsienko. This notion takes place in the superspaces theory studied since years in geometry. This algebra was discovered in the context of symplectic geometry. In a way, Lie antialgebras unify in a special meaning associative and commutative algebras with Lie algebras. Since this is quite a new subject a lot of things have to be done in the understanding of this structure. At first, I am going to explain the notion of superspaces and in particular the one of Lie superalgebras and give some important examples. After I am going to introduce the topic of Lie antialgebras and also give some examples. And finally I am going to give a links between them (Lie antilagebra and Lie superalgebra). If I have time, I will probably speak a bit about extensions and relations with 2-cocycles in the cohomology theory. That's what I am interested in for the moment. [less ▲]

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See detailPaleoearthquakes from Turbidites in the SISCOR project
Beck, Christian; Hubert, Aurelia ULg

Conference (2011, June 20)

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See detailThe use of Eco-Exergy in Oceanology: Application to Posidonia oceanica meadows
Pete, Dorothée ULg; Velimirov, Branko; Gobert, Sylvie ULg

Conference (2011, June 17)

In classic thermodynamics, exergy is defined as the useful work a system can perform when brought into equilibrium with its environment. It represents a measure of the distance from thermodynamic ... [more ▼]

In classic thermodynamics, exergy is defined as the useful work a system can perform when brought into equilibrium with its environment. It represents a measure of the distance from thermodynamic equilibrium. From that definition, some researchers (S.E. Jørgensen) have decided to apply this theory to ecosystems and called this expression of exergy “Eco-exergy”. According to this theory, a developing ecosytem trends to go far from its thermodynamic equilibrium and its exergy content trends to increase. Thus, the Laboratory of Oceanology of the University of Liege has decided to apply this quite new theory to Posidonia oceanica meadows, an endemic ecosystem of the Mediterranean coastal zone. This ecosystem is known as a good environmental quality indicator. So it was choosen to test the relevance of eco-exergy index as a quality indicator in the Mediterranean Sea. As this ecosystem is complex, this study focuses on the sedimentary compartment and the microbenthic loop (organic matter, bacteria, microphytobenthos and meiofauna). Some estimations of this eco-exergy index in the sedimentary compartment of a P. oceanica meadow are presented here. According to them, it seems that the eco-exergy index is not sensitive enough to catch effects of perturbations in this ecosystem. [less ▲]

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See detailRaman spectroscopy of dye mixtures on cotton fibres
Lepot, Laurent ULg

Conference (2011, June 17)

Raman spectroscopy is becoming a routine technique in numerous forensic labs since it is fast and non-destructive. Recent work has shown that Raman spectra of dyes depend on the excitation laser ... [more ▼]

Raman spectroscopy is becoming a routine technique in numerous forensic labs since it is fast and non-destructive. Recent work has shown that Raman spectra of dyes depend on the excitation laser wavelength used (resonance effects) and on the scattering ability of the dye molecule itself. Both factors together with fluorescence emission may affect the detection of a dye, especially within a mixture. In order to obtain a better understanding of their Raman behavior binary mixtures at various ratios have been prepared using five known dyes showing different scattering and fluorescent abilities. Their Raman investigation at 514 and 785 nm highlights the complementarity of these two resonant and non-resonant sources and the limitations of the Raman technique in the detection of both major and minor components of a dye mixture. Other investigations have been performed on binary and ternary known dye mixtures on cotton fibres by Raman spectroscopy and MSP-Vis. The combination of two laser sources leads in most cases to the detection of both or two out of three dye components. This Raman information reinforces clearly the confidence in MSP-Vis results. Indeed the contribution of the minor dye component is sometimes very small in the MSP spectrum and a visual inspection of the spectra in addition to inhomogeneous dyeing on cotton may result in difficult interpretation. For these reasons Raman spectroscopy is a very convenient technique to confirm or maybe specify the MSP results, especially for fibre types with common MSP spectra. Furthermore, MSP-Vis also showed some limitations with very light or very dark colored fibres whereas Raman spectroscopy could still discriminate between fibre types. [less ▲]

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See detailQuand les religieuses cloîtrées sillonnent l’Europe : récits de voyage et échanges épistolaires de femmes à la croisée des cultures
Henneau, Marie-Elisabeth ULg

Conference (2011, June 17)

Après le Concile de Trente, les réguliers s’investissent à nouveaux frais dans des missions d’évangélisation et de reconquête, sillonnant le monde, sinon avec l’intention de construire une Europe moderne ... [more ▼]

Après le Concile de Trente, les réguliers s’investissent à nouveaux frais dans des missions d’évangélisation et de reconquête, sillonnant le monde, sinon avec l’intention de construire une Europe moderne, du moins avec celle de repousser au plus loin les frontières de la catholicité et d’en affirmer la suprématie. Les femmes ne sont pas en reste. Apostoliques ou contemplatives, elles participent corps et âmes à cette entreprise de Réforme et de Contre-Réforme catholiques. L’exemple des annonciades célestes est significatif de cette volonté d’aller au front, armes spirituelles à la main, mais aussi de conforter la foi de leurs coreligionnaires par l’exemple de leur engagement. Au cours de la phase d’expansion de leur ordre, ces cloîtrées ont été amenées à se déplacer et à s’adapter régulièrement à de nouveaux contextes de vie à l’intérieur de l’espace européen. Leur découverte de l’autre est abondamment commentée dans leurs échanges épistolaires et récits de vie. L’une des expériences les plus marquantes pour certaines de ces femmes a sans doute été le voyage entrepris en 1666 en vue de la fondation d’une maison en Basse-Saxe, expédition qui a entraîné ces religieuses bien au-delà de leurs territoires de prédilection. Le récit de l’aventure relaté par les voyageuses au terme de leur périple a permis à celles demeurées sur place de suivre pas à pas le progrès de leur ordre et de participer avec leurs sœurs à cette étonnante découverte d’autres modes de vie et de pensée. [less ▲]

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See detailPrivate medical practice in Benin: dynamics of a growing sector
Failon, Julie ULg

Conference (2011, June 17)

In Benin, like in many countries in sub-Saharan Africa, the setting up of structural adjustment programs forces, in the middle of eighties, the government to limit the recruitment in civil service. As ... [more ▼]

In Benin, like in many countries in sub-Saharan Africa, the setting up of structural adjustment programs forces, in the middle of eighties, the government to limit the recruitment in civil service. As they were systematically hired by the State, most of health professionals are unemployed from 1986. Henceforth, private health sector grow progressively, without any legislation, through the development of many formal and informal private surgeries and clinics. The article will focus mainly on the development of private profit-making medical practice in Benin. It will be based on three empirical researches about medical profession in this country, from March 2009 to April 2011. In this paper, we will refer to qualitative interviews on the one hand with actors from both private and public medical structures, mainly doctors, paramedical staffs and patients, and one the other hand, with representatives of professional organizations, public policies in Ministry of Health and international organizations. First, the article will briefly describe the historical development of private medical practice in Benin, and consider governmental responses to this process. Thus we will address to the belated drawing up of a regulatory framework and the lack of control by the profession consequences, notably in terms of qualification, ethics and quality of health care. We will also examine recent reactions aimed at remedying to these different pitfalls. In this context, the paper will interest secondly in new entanglements between the public medical sector and the private medical structures emerging at local level. We will examine doctors’ practices and strategies, with only private practitioners and with doctors working in both private and public sectors. Finally, the article will give attention to how these private medical surgeries and clinics and the access conditions to these structures are perceived by health providers and patients. In this part of the paper, we will also address to tactics worked by patients regarding the different medical facilities. As a conclusion, we will wonder whether this medical private sector would contribute to reproduce some mechanisms of inequality in health sector. [less ▲]

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See detailA Two Degree of Freedom Kinematic Model for Predicting the Deformations of Deep Beams
Mihaylov, Boyan ULg; Bentz, Evan; Collins, Michael

Conference (2011, June 17)

In modern construction, it is not unusual to require a short span member to carry a very large load such as with a transfer girder. These members generally have high shear strengths with strut-and-tie ... [more ▼]

In modern construction, it is not unusual to require a short span member to carry a very large load such as with a transfer girder. These members generally have high shear strengths with strut-and-tie models being able to predict these strengths generally in a conservative manner. For serviceability checks, cracked stiffness estimates, and seismic design, however, it is also important to be able to predict the deformations of the member accurately. In this paper a set of eight large and heavily instrumented reinforced concrete deep beams subjected to monotonic or cyclic loading are summarized. The displacements of these tests are explained in detail with particular attention paid to the development of deformations over the full load history. From these deformations, the paper notes that a simple 2 degree of freedom (DOF) kinematic model can be developed to predict the entire displacement field for a beam after diagonal cracking has occurred. These two degrees of freedom are the average longitudinal strain in the flexural reinforcement, and the vertical distortion of the critical loading zone near the applied load. When the results of the measured displacements of the beam tests are compared to the pattern of deformations from the 2 DOF model, excellent agreement is obtained. In addition, it is shown that the width of the main diagonal crack can also be explained well using the same 2 DOF model once these parameters are known. A forthcoming paper will explain how these parameters themselves can be predicted. [less ▲]

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See detailDéfaillance neurologique au cours de l'insuffisance hépatique aigüe
DETRY, Olivier ULg

Conference (2011, June 16)

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See detailEvolving trends in Latin American regimes of science, technology and innovation: the politics of the “GM soya model” in Argentina
Delvenne, Pierre ULg

Conference (2011, June 16)

Our interest is to understand the challenges to modern (national) science and innovation regimes under conditions of globalization and “multiple modernities” (Eisenstadt 2000). Different scholarly ... [more ▼]

Our interest is to understand the challenges to modern (national) science and innovation regimes under conditions of globalization and “multiple modernities” (Eisenstadt 2000). Different scholarly attention has been paid to existing institutions that may no longer be adequate to address those challenges. This may be because modern institutions are pressured for a greater reflexive opening up of their structures (Beck and Lau 2005) or because the modern world-system is facing severe turbulences that would ultimately lead to a time of structural dissolution (Wallerstein 2005). This renders interesting to trace the responses to these challenges, and we suggest to do it in the field of science, technology and society, one where we can make a contribution. Unlike many studies mainly focusing on European models and regimes, our ongoing multi-level comparative research takes Latin American countries as an entrance point to finding responses that are different from those occuring in European countries. Latin American countries are interesting to study in this respect because institutions of science and technology have not been set up in the same way as in Europe and the governance patterns have been different. Our presentation is based on one country, Argentina, and focuses on one important sector: biotechnology in agriculture. Argentina is taken as a central case study because in addition of being today the second largest exportator of GM crops (behind the US and before Brasil), it has been the first country in Latin America to establish a professional regulatory framework in the early 1990s, looking at ecological, health and commercial aspects. GM soya crops is specifically analysed because of its importance — GM soya represents 60% of the cultivated areas — and its controversial aspect : the « GM soya model » is presented at the same time as an elixir for agro-industrial ills and as a techno-economic network increasing the benefits of the global North while dramatically affecting public health and the environment in Argentina. We suggest to diagnose developments and perceptions of issues related to health, economy, ecological diversity, fertility of soils, regulation and intellectual property. Our methodology favours qualitative data collection (individual interviews with key actors of science and innovation) and analysis, while using quantitative data when available and relevant. [less ▲]

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See detailAvis des bénévoles impliqués dans le sport belge francophone au sujet de leur rôle. Etude pilote.
Robyns de Schneidauer, Jérôme ULg; Colina-Valdor, Xavier; Cloes, Marc ULg

Conference (2011, June 16)

Le sport représente la plus grande activité sociale en Europe. L'activité des 700.000 clubs sportifs des pays membres de l'Union européenne est en grande partie basée sur le travail bénévole de ses ... [more ▼]

Le sport représente la plus grande activité sociale en Europe. L'activité des 700.000 clubs sportifs des pays membres de l'Union européenne est en grande partie basée sur le travail bénévole de ses membres. Le bénévolat est reconnu comme l’une des caractéristiques spécifiques et essentielles des structures sportives européennes. Il faut souligner ici que le monde sportif est le plus grand utilisateur de travailleurs volontaires avec 35 % du bénévolat total. L’engagement et la qualité de travail des bénévoles sont souvent les clés de la réussite de tout club sportif. Ce qui motive une personne à être bénévole est complexe (Esmond,1997). Cependant, comprendre ces motivations profondes est suggéré par de nombreux auteurs comme étant un facteur primordial dans le recrutement, la sélection, le placement et la rétention des bénévoles au sein d’une organisation (Clary, Snyder & Ridge,1992 ; Cnaan & Goldberg-Glen,1991 ; Esmond,2001 ; McCurley & Lynch,1994 ; Vineyard,2001). Identifier les motivations de chaque bénévole permettrait au dirigeant de mieux cibler les tâches propres à chacun, assurant ainsi une plus grande satisfaction et un investissement plus long dans la durée (Slaughter,2002). Notre étude pilote vise, d’une part, à faire une mise au point sur les raisons principales qui poussent les bénévoles à s’engager dans ce type d’activité en Communauté Wallonie-Bruxelles et, d’autre part, de mieux cerner la propre opinion que les bénévoles ont de leur monde. Notre objectif final consiste à jeter les bases nécessaires pour effectuer une enquête à grande échelle. Un total de 224 questionnaires orientés sur le vécu de chaque bénévole a ainsi été collecté. Les réponses furent encodées sous formes de variables binaires, continues ou catégorielles. L’étude met en évidence 3 principales motivations au bénévolat sportif : (1) aider les autres (accord très élevé, 94% de réponses positives), (2) partager sa passion pour le sport (accord très élevé, 85% de réponses positives) et (3) se socialiser grâce au contact avec d’autres personnes (accord élevé, 71% de réponses positives). A partir de nos résultats, chaque sujet consacrerait en moyenne 8,8h par semaine au bénévolat. Au vu des études menées dans le monde du bénévolat et des résultats de notre étude pilote, il semblerait opportun de s’intéresser encore davantage aux bénévoles et à leurs difficultés, de comprendre la diversité des contextes dans lesquels ils évoluent. Nous proposons, enfin, de les impliquer dans le développement de stratégies susceptibles de garantir la pérennité de leur action et de l’idéal qui les anime. [less ▲]

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See detailLes besoins en mathématique des futurs professeurs du secondaire
Schneider-Gilot, Marguerite ULg

Conference (2011, June 15)

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See detailInvestigation of the physics of wind interactions in colliding-wind massive binaries through XMS high resolution X-ray spectroscopy
De Becker, Michaël ULg

Conference (2011, June 14)

Binary systems made of two massive stars offer the opportunity to investigate the physics of quite extreme stellar environments. The powerful stellar winds collide, producing so-called wind interaction ... [more ▼]

Binary systems made of two massive stars offer the opportunity to investigate the physics of quite extreme stellar environments. The powerful stellar winds collide, producing so-called wind interaction regions, and the shocked gas is heated up to temperatures that can reach values as high as several tens of MK, leading to the production of copious amounts of thermal X-rays. The properties of the X-ray spectrum of such systems are intimately related to the orbitally modulated physical conditions in the wind interaction region. The study of the hydrodynamics of the colliding-wind phenomenon is a crucial issue in the sense that it constitutes the basement for the study of higher level physical processes at work in these systems, such as particle acceleration or even dust production. High-resolution X-ray spectroscopy with ATHENA/XMS is undoubtedly expected to be the most powerful tool to probe the physics of such environments over the next two decades, allowing a detailed confrontation to state-of-the-art theoretical models aiming at simulating the complex physics of colliding-wind massive binaries (CWBs). [less ▲]

Detailed reference viewed: 14 (1 ULg)
See detailTurbiditic sedimentary record in the different basins of the Sea of Marmara
Hubert, Aurelia ULg; Drab, Laureen; Schmidt, Sabine et al

Conference (2011, June 13)

Detailed reference viewed: 31 (8 ULg)
Peer Reviewed
See detailA Boolean network approach to developmental engineering
Kerkhofs, Johan ULg; Roberst, Scott J; Luyten, Frank P et al

Conference (2011, June 13)

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Peer Reviewed
See detailSoil-plants relations diversity in extreme ecosystems and implications for restoration: the case of the cupriferous vegetation, in Katanga, D.R. Congo
Seleck, Maxime ULg; Lebrun, Julie ULg; Piqueray, Julien ULg et al

Conference (2011, June 13)

Katangan copper and cobalt hills in the D. R. Congo are isolated ecosystems on highly toxics substrates (>10.000 ppm Cu, with strongly marked gradients). As a result, those outcrops host singular vegetal ... [more ▼]

Katangan copper and cobalt hills in the D. R. Congo are isolated ecosystems on highly toxics substrates (>10.000 ppm Cu, with strongly marked gradients). As a result, those outcrops host singular vegetal communities – with a diversity of specialized metallophytes species – related to soil metals content. Recent resumption of mining activities in the area threatens those ecosystems. To allow the restoration of those communities a fine understanding of the relationship maintained with the edaphic factors is required, as well as a characterization of the intra and inter sites variation. Three outcrops have been studied on the basis of a systematic grid, following the a priori trace elements gradient. In 1m² quadrats, a composite soil sample (0-15 cm depth) was taken and the cover (%) of each species of vascular plants was recorded. Soils were analyzed for pH, C, N, and bioavailables Cu, Co, Zn, Mn, Fe, K, Mg, Ca and P. The cluster analysis and Canonical Correspondence Analysis show that different sites present different soil conditions and vegetation. Concentrations in Cu are an important explicative factor of the flora’s variation but gradients in others edaphic parameters (pH, Mg, Mn, K, Ca) appear to be essential. However, parameters explaining the diversity of communities vary from one site to another indicating a great diversity of those ecosystems and the need to develop restoration strategies relevant for each site. [less ▲]

Detailed reference viewed: 53 (11 ULg)
See detailChoix des biomatériaux dans la régénération osseuse alvéolaire.
LAMBERT, France ULg

Conference (2011, June 11)

L’utilisation de biomatériaux dans la régénération osseuse alvéolaire est aujourd’hui incontournable au vu des évidences scientifiques et de la morbidité liée aux techniques de greffes osseuses autologues ... [more ▼]

L’utilisation de biomatériaux dans la régénération osseuse alvéolaire est aujourd’hui incontournable au vu des évidences scientifiques et de la morbidité liée aux techniques de greffes osseuses autologues. Cependant, une multitude de biomatériaux, ayant des caractéristiques physico-chimiques et des origines différentes, sont disponibles sur le marché. Leur influence sur l’ostéogénèse, ainsi que leur comportement à court et long terme sont souvent mal connus des praticiens. Le but de cet exposé est de clarifier les propriétés des biomatériaux les plus utilisés en médecine dentaire, ainsi que de déterminer leurs indications et leurs limitations cliniques. [less ▲]

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See detailLa libération sans la révolution. Les avatars de la contre-culture en France
Denis, Benoît ULg

Conference (2011, June 10)

Detailed reference viewed: 19 (2 ULg)
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See detailMechanism of Nicotinic acid-induced Flushing
Hanson, Julien ULg

Conference (2011, June 10)

Detailed reference viewed: 23 (1 ULg)
See detailLes conseillers à l'emploi : tensions de l'intermédiation
Orianne, Jean-François ULg

Conference (2011, June 10)

Detailed reference viewed: 38 (10 ULg)
Peer Reviewed
See detailLe musée de ville, une catégorie muséale en quête de définition
Postula, Jean-Louis ULg

Conference (2011, June 10)

Detailed reference viewed: 38 (2 ULg)
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See detailCan the Electoral Threshold Explain – some part of – Electoral Volatility in Belgium?
Reuchamps, Min ULg; Onclin, François ULg

Conference (2011, June 10)

Recent election results showed an increased electoral volatility in Belgium. In the mean time, the very stable Belgian electoral system experienced a – quite – important change with the implementation of ... [more ▼]

Recent election results showed an increased electoral volatility in Belgium. In the mean time, the very stable Belgian electoral system experienced a – quite – important change with the implementation of a five per cent electoral threshold in both federal and regional elections. Therefore, can the introduction of this legal threshold explain – some part of – the increased electoral volatility in Belgium? The last five general elections – three federal (2003, 2007 and 2010) and two regional (2004 and 2009) offer a fertile ground for such an investigation. More specifically, in order to provide an answer to this question, we look at the psychological effect, as coined by Duverger and since then much refined. In addition to the existence of a mechanical effect, the electoral system may have a psychological impact on both voters and parties. Indeed, voters and party elites may adapt their behaviour to the implementation of the electoral threshold and this adaptation could explain electoral volatility. To test this hypothesis, we use several formulas in order to measure the psychological impacts of the five per cent threshold on Belgian voters, on the one hand, and on Belgian political parties, on the other hand. Our results show the impact of the legal threshold should be nuanced. While there was in fact an impact – both mechanical and psychological – on parties, it did not prevent the emergence of new political parties – which may explain some part of the electoral volatility. As of the voters, when they are aware of the threshold, they tend not think of the legal electoral threshold in the polling booths, so the main explanations for electoral volatility should be sought elsewhere. [less ▲]

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See detailEnquête sur l’innovation en Province de Liège : premiers résultats
Artige, Lionel ULg; Dubois, David

Conference (2011, June 09)

Detailed reference viewed: 19 (4 ULg)
See detailparticipation au débat Monsieur Gagne-pain et Madame Gagne-petit
Gavray, Claire ULg

Conference (2011, June 09)

comment les indicateurs économiques retenus tronquent la réalité concernant les gains professionnels et les risques de pauvreté des hommes et des femmes ?discussion technique et de fond

Detailed reference viewed: 26 (1 ULg)
See detailRomain Gary, compagnon de l'aliénation
Sindaco, Sarah ULg

Conference (2011, June 09)

Detailed reference viewed: 17 (4 ULg)
See detailLes capacités européennes
Dumoulin, André ULg

Conference (2011, June 09)

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See detailTax Evasion, Welfare Fraud, and ”The Broken Windows” Effect: An Experiment in Belgium, France and the Netherlands
Lefebvre, Mathieu ULg

Conference (2011, June 09)

In a series of experiments conducted in Belgium (Wallonia and Flanders), France and the Netherlands, we compare behavior regarding tax evasion and welfare dodging, with and without information about ... [more ▼]

In a series of experiments conducted in Belgium (Wallonia and Flanders), France and the Netherlands, we compare behavior regarding tax evasion and welfare dodging, with and without information about others’ behavior. Subjects have to decide between a ‘registered’ income, the realization of which will be known to the tax authority for sure, and an ‘unregistered’ income that will only be known with some probability. This unregistered income comes from self-employment in the Tax treatment and from black labor supplementing some unemployment compensation in the Welfare treatment. Subjects have then to decide on whether reporting their income or not, knowing the risk of detection. The results show that (i) individuals evade more in the Welfare treatment than in the Tax treatment; (ii) many subjects choose an option that allows for tax evasion or welfare fraud but report their income honestly anyway; (iii) examples of low compliance tend to increase tax evasion while examples of high compliance exert no influence; (iv) tax evasion is more frequent in France and the Netherlands; Walloons evade taxes less than the Flemish. There is no cross-country difference in welfare dodging. [less ▲]

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See detailNEMA NU4-2008 performance evaluation for the microPET Focus 120 and iodine-124
Taleb, Dounia ULg

Conference (2011, June 09)

Detailed reference viewed: 20 (4 ULg)
See detail« Ce qu’il est con ce Baader ! » – Sartre à Stammheim
Cormann, Grégory ULg; Hamers, Jérémy ULg

Conference (2011, June 09)

Detailed reference viewed: 40 (5 ULg)
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See detail20 ans de formation ! et demain ?
Morant, Michel ULg

Conference (2011, June 08)

La présentation met en évidence les besoins nouveaux dans les compétences requises pour un gestionnaire de transfert de technologie ou agent de valorisation

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See detailTraitement d'incidents critiques dans le cadre de séminaires de pratiques réflexives organisés en formation initiale des enseignants de langues modernes à l'Université de Liège
Simons, Germain ULg

Conference (2011, June 07)

Cette communication présente un dispositif particulier des séminaires de pratiques réflexives organisés dans le cadre du Master à finalité didactique/de l'AESS en langues modernes à l'ULg, en l'occurrence ... [more ▼]

Cette communication présente un dispositif particulier des séminaires de pratiques réflexives organisés dans le cadre du Master à finalité didactique/de l'AESS en langues modernes à l'ULg, en l'occurrence, le traitement d'incidents critiques vécus en stages d'enseignement. Après avoir proposé une définition opérationnelle du terme "incident critique" (IC), l'auteur décrit et commente les grandes étapes de traitement des IC, puis fournit quelques éléments d'évaluation de ce volet particulier du dispositif de formation. Enfin, la communication se clôture avec la formulation de quatre questions ouvertes relatives aux pratiques réflexives. [less ▲]

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See detail"Coaching" assisté par la vidéo dans le cadre du CAPAES en langues modernes à l'Université de Liège
Simons, Germain ULg

Conference (2011, June 07)

Cette communication présente un dispositif de formation proposé dans le cadre du C.A.P.A.E.S. en langues modernes organisé par l'Université de Liège (Belgique). Plus précisément, elle analyse le soutien ... [more ▼]

Cette communication présente un dispositif de formation proposé dans le cadre du C.A.P.A.E.S. en langues modernes organisé par l'Université de Liège (Belgique). Plus précisément, elle analyse le soutien individuel que le formateur apporte à chaque étudiant ("coaching") dans la conception, la mise en pratique et l'évaluation d'une séquence didactique expérimentale. Une des leçons de la séquence est intégralement filmée et fait l'objet d'un séminaire d'autocopie avec l'étudiant. Les extraits vidéo sont également utilisés pour illustrer la séance de partage d'expériences en fin d'année. Enfin, une fois didactisées, les séquences vidéo servent à illustrer le cours de didactique professionnelle et à l'ancrer davantage dans la pratique professionnelle des étudiants-enseignants. [less ▲]

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See detailModelo de componentes para análise de ligações de madeira com ligadores metálicos
Cachim, Paulo; Franssen, Jean-Marc ULg

Conference (2011, June 07)

Connections are key elements in any structure because the knowledge of their behaviour is fundamental to an appropriate structural modelling since this behaviour can influence the distribution of efforts ... [more ▼]

Connections are key elements in any structure because the knowledge of their behaviour is fundamental to an appropriate structural modelling since this behaviour can influence the distribution of efforts in different structural elements. In the particular case of wood structures, connections are usually considered as completely rigid or hinged, but their actual behaviour is intermediate between these two extreme limits, depending on the geometry of the connection and the type of connector used. For the design of these connections, the methodology proposed by Eurocode 5 is based on plastic limit analysis which allows the determination of load strength of the connection but not the determination of its stiffness. For the determination of stiffness, Eurocode 5 presents just a very simple expression that depends only on the density of the wood and the diameter of connector to characterize the force-displacement behaviour, disregarding for this purpose the geometry of the connection or the angle of force in relation to the grain. The objective of this paper is to present a component model that allows the characterization of the behaviour of dowel type connections. The results obtained with the model were calibrated with experimental results obtained in the litterature. [less ▲]

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See detailA shell fracture framework based on a full discontinuous Galerkin formulation combined with an extrinsic cohesive law
Becker, Gauthier ULg; Noels, Ludovic ULg

Conference (2011, June 06)

The cohesive method can be combined easily with Finite Element method to simulate a fracture problem which can contains fracture initiation and propagation. Nevertheless, the insertion of cohesive ... [more ▼]

The cohesive method can be combined easily with Finite Element method to simulate a fracture problem which can contains fracture initiation and propagation. Nevertheless, the insertion of cohesive elements is not straightforward. Indeed, the two classical approaches suffer from severe limitations. On one hand, in the intrinsic approach, as the cohesive element is inserted at the beginning, this element has to model the continuum stage of deformation before fracture. This is ensured by an initial slope in the cohesive law which leads to a stiffness modification and to an alteration of propagation of wave. On the other hand, the introduction of the cohesive element during the simulation in extrinsic approach requests a dynamic modification of mesh. This operation is very difficult to implement especially in the case of a parallel implementation which is almost mandatory due to the very important number of degrees of freedom inherent to a fine mesh used to track the crack path. A solution to these limitations, pioneered by J. Mergheim and R. Radovitzky is to recourse to a discontinuous Galerkin formulation. Indeed this one used discontinuous test functions and integration at the interface of elements to discretize a structure with discontinuous elements. The integration on the boundary of elements allows ensuring weakly the continuity of displacements in a stable and consistent manner. As interface elements are present they can be easily substituted by cohesive elements when a fracture criterion is reached. The interest of the method has been recently proved by R. Radovitzky etal. for 3D elements and by the authors for Euler-Bernoulli beams. An extension of the formulation to Kirchhoff-Love shell is presented here. A novel extrinsic cohesive law is developed to model a through the thickness fracture. In fact, as in thin bodies formulation the thickness is not “discretized” this operation is not straightforward. Indeed, as the fracture occurs only in tension, in a pure bending case the position of neutral axis has to be move to propagate the fracture. To avoid this complicated step, it is suggested to integrate on the thickness the cohesive law which is then applies on resultant efforts. The coupling between the openings in displacement and rotation is performed in a way which guarantees a proper release of energy for any loading. Furthermore, the combination between fracture modes I and II is realized as suggested by M. Ortiz etal. Some numerical quasi-static and dynamic benchmarks are simulated to show the interest and the good performance of the presented framework. [less ▲]

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See detail20 ans de valorisation dans l'Espace Wallonie-bruxelles
Morant, Michel ULg

Conference (2011, June 06)

La présentation brosse 2à années d'évolution des universités en Wallonie en matière de 3e mission, et en particulier de la valorisation économique de la recherche

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See detailMALDI mass spectrometry imaging of secreted lipopeptides in a bacterial biofilm colonizing plant roots
Debois, Delphine ULg; Jourdan, Emmanuel ULg; Ongena, Marc ULg et al

Conference (2011, June 06)

During the aggression of a plant by a pathogen, different immune reactions may occur. "Induced Systemic Resistance” (ISR) is triggered by the specific interaction between plant and non-pathogenic ... [more ▼]

During the aggression of a plant by a pathogen, different immune reactions may occur. "Induced Systemic Resistance” (ISR) is triggered by the specific interaction between plant and non-pathogenic microorganism. The first step (of three) consists in the perception by plant cells of elicitors produced by the inducing agents that initiates the phenomenon. One class of known elicitors is antibiotics including surfactin- and fengycin-type lipopeptides. Recent studies in biology, genetics or biochemistry allowed a better understanding of the interactions between plants and microorganism but few has been done at the molecular level. MALDI MS imaging has been used to study the nature of the secreted lipopeptides, their relative quantity and their distribution in the root’s environment. Disinfected tomato seeds were first incubated at 28°C in sterile conditions for germination. Germinated seeds were then treated with freshly-grown cells of Bacillus amyloliquefaciens S499 and placed in Petri dish on ITO glass slide recovered with a thin layer of plant nutritive solution (Hoagland) containing 1,75% of agar. Petri dishes were finally incubated vertically in phytotron during 10 days (28°C, photoperiod 16h). For MALDI imaging experiments, the ITO slide was removed from the agar and dried in a dessiccator under vacuum. The matrix solution (9-aminoacridine) was applied with an ImagePrep automated sprayer (Bruker Daltonics). An UltraFlex II TOF/TOF mass spectrometer was used to record molecular cartographies. The average mass spectra recorded around the tomato root (2-3 mm on both sides of the root) showed that lipopeptides were major compounds detected on the agar. Only the surfactins have been detected when working with the S499 strain. The most abundant surfactins were those with longer fatty acyl chain lengths, such as C14- and C15-homologues. Such a surfactin signature is interesting since homologues with the longest acyl chains are also the more active biologically. The distribution of surfactins showed a gradient representing the diffusion of the molecules during the root growth. The more the fatty acyl chain is long, the more the surfactin is detected near the root. Other compounds detected during the analysis showed a clear anti-colocalization with the surfactins. Future work will be focused on the influence of the plant species (tobacco, salad, Arabidopsis thaliana) on the secretion of lipopeptides (type, concentration…) and the influence of the strain of Bacillus amyloliquefaciens regarding its ability to selectively produce specific lipopeptide families (overproducing or repressed mutants). This MS imaging technique thus appears to be a very powerful method to study in situ production of bioactive lipopeptides by bacteria developing on roots. This is crucial for a better understanding of the molecular dialogue governing perception of beneficial Bacillus strains by the host plant. This study provides a first analysis over a long root section of lipopeptides secreted by a bacterial biofilm colonizing plant. [less ▲]

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See detailOrdinary Citizens' Experiences of Law as Process: The Case of Employment Discriminations in Belgium
Lejeune, Aude ULg; Orianne, Jean-François ULg

Conference (2011, June 04)

Through their different encounters with union, court, and government equality agency lawyers, workers report diverse understandings of her personal experience of injustice in the workplace. This paper ... [more ▼]

Through their different encounters with union, court, and government equality agency lawyers, workers report diverse understandings of her personal experience of injustice in the workplace. This paper examines workers’ experiences of discrimination and the role lawyers play in litigating these issues in Belgium. Bringing together the legal and rights consciousness studies and the sociology of mediation and tracking different stages in the construction of discrimination cases, from the moment when a future litigant describes an event as an injustice to the moment when the judge recognizes a discriminatory behavior (or conversely, dismisses a case), we suggest several possible empirical explanations of the way in which lawyers’ interpretation of a case directly affects workers’ rights consciousness. Because we refer to US socio-legal studies, this paper also calls into question how to import these studies to assist in analyzing legal mobilizations and legal consciousness in continental Europe. [less ▲]

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See detailLa littérature à l'ombre
Saint-Amand, Denis ULg

Conference (2011, June 03)

Detailed reference viewed: 13 (0 ULg)
See detailBiogeochemistry of the Congo river: Preliminary data
Darchambeau, François ULg; Borges, Alberto ULg; Wabakanghanzi, José Nlandu et al

Conference (2011, June 03)

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See detailL’étrange figement des séquences polylexicales antonymes
Steffens, Marie ULg

Conference (2011, June 01)

Detailed reference viewed: 8 (1 ULg)
See detailAuroral emissions of Europa
Grodent, Denis ULg

Conference (2011, June 01)

Detailed reference viewed: 9 (1 ULg)
See detailQuelques cas de figement dans le volume 17 de l'Atlas linguistique de la Wallonie
Baiwir, Esther ULg

Conference (2011, June 01)

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See detailAn efficient biphasic synthesis of polymer-grafted reduced graphite oxide based nanocomposites
Vuluga, Daniela ULg; Thomassin, Jean-Michel ULg; Molenberg, Isabel et al

Conference (2011, June 01)

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See detailImpact of the Use of Crumb Rubber Modified Binder on Tire/Road Noise Generation
Luong, Jeanne ULg; Bueno, M.; Teran, F. et al

Conference (2011, June)

The recycling of waste material produced by human activity is one of the challenges of our generation. One of the most serious environmental problems of the recent years is mass production of tire and the ... [more ▼]

The recycling of waste material produced by human activity is one of the challenges of our generation. One of the most serious environmental problems of the recent years is mass production of tire and the di􏰟culty of disposing of them. The material and energetic valorization of the wasted tires is possible through the extension of 􏰔green roads􏰕. The incorporation of crumb rubber from wasted tires in bi- tuminous binders allows the design of new asphalt pavements with a higher viscosity. A preliminary study to determine the impact of the use of crumb rubber modi􏰝ed bituminous binder in the sound generation level for a thin layer type BBTM11A, has been carried out by the LA2IC. These results are compared with sound level from a BBTM11A with a conventional binder. This work presents the acoustical characterization performed on the regional road CM-3102 in Ciudad Real (Castilla- La Mancha), based on the close proximity methodology (Tiresonic Mk4-LA2IC ). In addition, mea- surements of super􏰝cial macrotexture pro􏰝le have been realized with the LaserDynamicPG-LA2IC to study the relationship with close proximity road noise. Furthermore, sound absorption measurements of BBTM11A compacted samples have been analyzed to understand the mechanisms involved in the sound generation. The results show that addition of crumb rubber by the wet process leads, in this case (20% crumb rubber content), to a decrease in the sound level emitted by the interaction between tire and road surface, at low frequency by mu􏰠ing the vibrations and by sounf absorption at high frequency. [less ▲]

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See detailGenetic interactions shaping the inflorescence of tomato
Périlleux, Claire ULg

Conference (2011, June)

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See detailMechanochemical Study of a Single Polypeptide Molecule: Force-Induced Conformational Transition
Willet, Nicolas ULg; Hinterdorfer, Peter; Lecommandoux, Sébastien et al

Conference (2011, June)

Detailed reference viewed: 13 (0 ULg)
See detailTowards the understanding of the structure and assembly of the E. coli septum
Derouaux, Adeline ULg; Vollmer, Waldemar

Conference (2011, June)

Detailed reference viewed: 5 (1 ULg)
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See detailMETHODOLOGY OF ANNOTATING VIDEOS AND STILL IMAGES AND DEVELOPMENT OF THE SOFTWARE COVER
Guillaumont, Brigitte; Carré, Cyril ULg; van den Beld, Inge et al

Conference (2011, June)

Detailed reference viewed: 109 (10 ULg)
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See detailComoment Risk and Stock Returns
Lambert, Marie ULg; Hübner, Georges ULg

Conference (2011, June)

Detailed reference viewed: 3 (0 ULg)
See detailSustainability of tropical forest biodiversity and services under climate and human pressure (BIOSERF): tracking the regeneration of human-used plants through dispersal by the animal community
Huynen, Marie-Claude ULg; Beudels, R.; Baert, A. et al

Conference (2011, June)

The objective of the BIOSERF project is to assess the sustainability of a tropical humid forest ecosystem and the local human communities in southern Congo under future climate, demographic and societal ... [more ▼]

The objective of the BIOSERF project is to assess the sustainability of a tropical humid forest ecosystem and the local human communities in southern Congo under future climate, demographic and societal changes. The project focuses on the interactions between flora, fauna and local human population to understand the processes affecting biodiversity and ecosystem services in tropical humid areas, with the objective of setting up mechanisms to preserve local biodiversity. In close collaboration with a local NGO, it will use a dynamic vegetation model (CARAIB) which will be integrated within an agent-based model, to analyze the impacts of different ecosystem services in a tropical humid area, e.g. the production of medicinal plants, of wood and other forest products, or the services provided by the building of natural reserves. The vegetation model will be upgraded to take into account the process of regeneration of several plant species, selected for their use by local human populations, through a quantitative and qualitative description of plant dispersal by the animal community. To do so, a selection of five tree species frequently or traditionally used will be made based on the results of a sociological survey. Observations (direct or through camera trapping) of a sample of the selected species will allow identifying the main dispersers and the pattern of seed shadow they generate. Integrated into the CARAIB model, these results will allow figuring how the evolution of the dispersal community under pressures of climate change, habitat loss and hunting, but also potentially placed under managed protection could affect the services available to the human community. [less ▲]

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See detailManagement éthique, responsabilité sociale en entreprise et leadership: quelques questions
Robert, Jocelyne ULg

Conference (2011, June)

The question is the links between leadership and corporate social responsibility. Can some types of leadership improve some type of social responsibility? Are moral leadership and ethical leadership one ... [more ▼]

The question is the links between leadership and corporate social responsibility. Can some types of leadership improve some type of social responsibility? Are moral leadership and ethical leadership one solution? Today, in the international economic context, it is important to think about the kind of leadership for the company. To understand this links, it is important to understand the relation between the different stakeholders, the importance of the corporate culture and of the corporate identity. How build this identity? Which levels? One individual level and one institutional level exists. We will try to understand the contradictions and the resistances for more social responsibility and will present some cases. [less ▲]

Detailed reference viewed: 246 (57 ULg)
See detailControl and Voting Power in Complex Shareholding Networks
Crama, Yves ULg; Leruth, Luc ULg; Su Wang

Conference (2011, June)

Detailed reference viewed: 52 (3 ULg)
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See detailAlternative ways of financing social insurance in Latin America
Jousten, Alain ULg; Gillingham, Robert

Conference (2011, June)

Detailed reference viewed: 8 (2 ULg)
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See detailANALYSING VIDEOS AND STILL IMAGES OF VULNERABLE MARINE ECOSYSTEMS IN THE DEEP-SEA: A PRACTICAL APPLICATION USING COVER
Guillaumont, Brigitte; Carré, Cyril ULg; van den Beld, Inge et al

Conference (2011, June)

Detailed reference viewed: 144 (19 ULg)
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See detailProbing the cores of Extreme Horizontal Branch stars by gravity-mode seismology
Van Grootel, Valérie ULg; Charpinet, Stéphane; Fontaine, Gilles et al

Conference (2011, June)

We present a seismic analysis of the pulsating subdwarf B star KPD 0629-0016 on the basis of the long-period, gravity-mode pulsations uncovered by CoRoT. Thanks to space- based facilities, g-mode ... [more ▼]

We present a seismic analysis of the pulsating subdwarf B star KPD 0629-0016 on the basis of the long-period, gravity-mode pulsations uncovered by CoRoT. Thanks to space- based facilities, g-mode seismology can now be exploited quantitatively for stars on the ex- treme horizontal branch, an objective undermined so far by the limitations of ground-based observations. The optimal seismic model offers an excellent fit, with a relative dispersion of 0.23%, to the 18 observed periods identified with theoretical modes of degrees l =1 and 2. The inferred structural parameters for KPD 0629–0016 include the total stellar mass, the thickness of the H-rich envelope, and, thanks to the sensitivity of g-modes, the size and the composition of the convective core. Our results suggest that extra mixing processes shape the helium-burning cores, that are representative of all horizontal branch stars in general, an intermediate and underrated stage of stellar evolution. [less ▲]

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