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See detailLindane et goudron dans les shampoings: quelle toxicité ?
Theunis, Laetitia ULg

Conference (2008, December)

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See detailEnjeux et conditions de l'enseignement des langues dans les universités
Defays, Jean-Marc ULg

Conference (2008, December)

Detailed reference viewed: 9 (2 ULg)
See detailIsothermal titration calorimetry as a tool for improving enzymatic lignocellulose hydrolysis
Razafindralambo, Hary ULg; Boquel, Pascal; Jacquet, Nicolas ULg et al

Conference (2008, December)

Detailed reference viewed: 21 (9 ULg)
See detailDevelopment of products for GNSS users at the Belgian Solar-Terrestrial Centre of Excellence
Warnant, René ULg; Lejeune, Sandrine; Stankov, Stanimir et al

Conference (2008, December)

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See detailDesign of perfluorinated macroligand for the implementation of atom transfer radical polymerization in supercritical carbon dioxide
Grignard, Bruno ULg; Jérôme, Christine ULg; Calberg, Cédric ULg et al

Conference (2008, November 28)

Due to an increasing need for polymers with well-defined architecture (diblock-, graft-, star-shaped copolymers), molecular weight and/or functional end-groups, the use of controlled radical ... [more ▼]

Due to an increasing need for polymers with well-defined architecture (diblock-, graft-, star-shaped copolymers), molecular weight and/or functional end-groups, the use of controlled radical polymerization (CRP) in scCO2 has started to gain attention. Among all the controlled processes, Atom Transfer Radical Polymerization has emerged as a robust tool for the preparation of polymers with well-defined molecular weight, architecture and chain-end functionality. The goal of the research relies on the development of ATRP of vinyl monomers in scCO2. Perfluorinated polymethacrylate, i.e. poly2,2,2-trifluoroethyl methacrylate (PFMA), was successfully prepared by homogenous ATRP using a polymeric ligand in order to complex the copper catalyst. CO2-soluble poly(2,2,2-trifluoroethylmethacrylate) was also prepared in supercritical CO2 by supported ATRP using a “pseudo-homogeneous” catalyst consisting of copper (I) ligated by macroligand immobilized onto an inorganic support, that results in polymers with well defined molecular weight and low polydispersity. The first efficient dispersion ATRP of methyl methacrylate (MMA) in scCO2 using a fluorinated polymeric ligand that had a dual role, i.e., the complexation of the copper salt and the stabilization of PMMA growing particles was also reported and the concept of dispersion ATRP was extended to the dispersion ATRP of styrene, to the synthesis of diblock copolymers beads using PMMA beads as macroinitiators, leading to (co)polymers with predictable molecular weight and narrow polydispersity. Finally, because both ATRP and alkyne-azide Huisgen’s 1,3-dipolar cycloaddition relies on the use of a Cu(I) catalyst, synthesis of pyrene end-functionalized polymers by simultaneous dispersion ATRP and click reaction was also investigated in supercritical carbon dioxide, leading to the formation of PMMA of well defined characteristics that was collected as fluorescent micropheres. [less ▲]

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See detailTowards Another Summer
Delrez, Marc ULg

Conference (2008, November 28)

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See detailDesign of thermoresponsive inorganic nanoparticles
Aqil, Abdelhafid ULg; Jérôme, Christine ULg

Conference (2008, November 28)

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See detailStimuli responsive nanogels for targeted drug delivery
Jérôme, Christine ULg

Conference (2008, November 28)

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See detailSummary of aim and achievements in Work Package 7 "Functional Coatings"
Jérôme, Christine ULg

Conference (2008, November 28)

Detailed reference viewed: 10 (2 ULg)
See detailA Lilliputian lignophyte from the Lower Devonian?
Gerrienne, Philippe ULg; Strullu-Derrien, C.; Steemans, Philippe ULg

Conference (2008, November 27)

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See detailLa figure de la femme dans les opéras de Wolfgang Amadeus Mozart (1756-1791) et de Giuseppe Verdi (1813-1901)
Corswarem, Emilie ULg; Onkelinx, Jean-Marc

Conference (2008, November 26)

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See detailL’enfance comme champ d’intervention politique au Burkina Faso
Wouango, Joséphine ULg

Conference (2008, November 21)

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See detailNon rigid stabilization of the spine.
Martin, Didier ULg

Conference (2008, November 21)

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See detailVenture Creation Intentions and Midlife Crisis
Heuer, Annamaria ULg; Surlemont, Bernard ULg

Conference (2008, November 21)

Aim of the paper This paper aims to analyse the relationship between life stages and the drivers of venture creation intention and, hence, the venture creation. The objective is to analyse the extent to ... [more ▼]

Aim of the paper This paper aims to analyse the relationship between life stages and the drivers of venture creation intention and, hence, the venture creation. The objective is to analyse the extent to which the single-minded focus of most policy measures on early adult population to spur intention is not understating the importance of adapting the approach to specific life stages of the target population. Using different conceptualisations of age biological, psychological, organisational and life span related , we will take here a closer look at the midlife age cluster, centred around the 35th year. Contribution to the literature Numerous studies have applied models based on cognition research to understand entrepreneurial intentions and the factors that impact them (e.g. Autio et al., 2001; Kolvereid, 1996; Krueger, Reilly and Carsrud, 2000; Kristiansen and Indarti, 2004). However, besides a few exceptions, such as Douglas and Shepherd (2002) or Davidsson (1995), most scholars have conducted their studies on university students, due to their advantages as sample, like easier information access and homogeneity of population. Not much attention has been paid to the potential influence of the life-stage factor and its potential impact on policy formulation. Taking a chronological age perspective, Levinson (1986) proposed that there is an “underlying order in human life course”, no matter what occupation or background people have. He conceived life as a sequence of eras, each of them with a specific biopsychosocial character and each of them contributing to the whole life cycle. Major changes of life characteristics occur in the cross-era transition, but also within a life stage. According to this approach, every life stage has tasks to be accomplished (Levinson et al., 1978). From an entrepreneurship perspective, it is especially interesting to introduce this model by taking a closer look at stages of “Early adulthood” (age c. 20-40). “Early adult transition” (age c. 17-22) for instance is characterised by reflections about one’s own place in the world independent from the institutions of youth (parents, school…). It is also about testing one’s initial choices about preferences for the adult life. This is in line with the “impressionable years” hypothesis, which is based on the notion that key attitudes, beliefs, and values are of great plasticity during the early adult years (Sears, 1975; Visser et al., 1998), while suggesting that susceptibility to change in attitude falls sharply after early adult years and stays on a low level for the rest of the life cycle. These attitudes, beliefs and values build an essential pillar of intentions, and are thus relevant for the study of entrepreneurial intentions. A vast quantity of policies trying to foster entrepreneurship usually target the “Early adult transition” cluster, arguing that entrepreneurial intention is created at this stage, even though, it is rather the entrepreneurial attitude that comes into existence at this point. Another remarkable and relevant milestone of Levinson’s life stage development model is linked to the age of c. 29 to 33, called “Thirties transition”, and which is dealing with the evaluation of the accomplishments of the twenties and the adjustments to the adopted life structure. It is a time characterised by instability and change, in which it is to be expected that commitment and satisfaction will remain low: for instance, individuals at this era will express greater intentions to leave their company (Ornstein et al., 1989), and possibly, to create one. This may provide another explanation to why it is observed that the age for new venture creation is around 35 years. Given that entrepreneurial activity does not only depend on the desirability and feasibility of entrepreneurship, but also upon the desirability and feasibility of employment (Kolvereid, 1996b), this could help to explain the increased levels of early-stage entrepreneurship in this age-cluster, and is leading to the following questions: (i) If potential entrepreneurs in their thirties are much more susceptible to change, and considering the aging population and the expected increase of retirement age in the western world the economic importance of “older” entrepreneur’s is likely to increase (Weber, 2004), why then not stimulate them more? (ii) If attitude gets more rigid with age, is applying the same policy strategies to “younger” and “older” potential entrepreneurs really the most efficient approach, or are, this way, policy-makers failing to stimulate a part of the population? (iii) If policy-making is about trying to sell an idea and make the population buy it, why are we then ignoring basic marketing segmentation strategies? In order to provide to our knowledge the first more holistic picture of possible adult development related impacts on entrepreneurial intention, we will proceed in a rather systematic way by choosing different perspectives of aging such as chronological, psychological and organisational, focusing on and around the “midlife” age cluster. Methodology This paper is conceptual in nature, transferring important ideas from adult-development studies to the domain of entrepreneurship. Through our argumentation we will show that an in-depth analysis, in form of comparative studies, of aging-related changes of the factors determining intention is timely. Results To date, there has been only sporadic, short argumentation for aging-related changes of intentional antecedents, such as “organisational age” impacting perceived behavioural control or life-span age impacting how to bear the uncertainty of income from self-employment activity (Shane, 2003). We will provide a more rigorous review of this problematic, and by that hope to contribute to a better understanding of sometimes ambiguous details of study outcomes. Bibliography Aution, E., Keeley, R. H. (2001), ”Entreprenerial intent among students in Scandinavia and in the USA”, Entreprise and Innovation Management Studies, Vol. 2, No. 2, pp.145-160 Davidsson, P. (1995), ”Determinants of entrepreneurial intentions”, Paper prepared for RENT IX Workshop, Piacenza, Italy Douglas, E. J., Dean, A. S. (2002), ”Self-employment as a Career Choice: Attitudes, Entrepreneurial Intentions, and Utility Maximization”, Entrepreneurship: Theory & Practice, Vol. 26, Issue 3, pp. 81-90 Kolvereid, L. (1996), ”Organizational employment versus self-employment: reasons for career choice intentions”, Entrepreneurship: Theory & Practice, Vol. 20, Issue 3, pp. 23-31 Kolvereid, L. (1996b), ”Prediction of Employment Status Choice Intentions”, Entrepreneurship: Theory & Practice, Vol. 21, Issue 1, pp. 47-57 Kristiansen, S., Indarti, N. (2004), ”Entrepreneurial intention among Indonesian and Norwegian students”, Journal of Entreprising Culture, Vol. 12, No. 1, pp. 55-78 Krueger, N. F., Reilly, M. D., Carsrud, A. L. (2000), ”Competing models of entrepreneurial intentions”, Journal of Business Venturing, Vol. 15, Issue 5/6, pp. 411-432 Levinson, D. J., Darrow, C. N., Klein, E. B., Levinson, M. H. and McKee; B. (1978), ”The seasons of a Man’s Life”, Alfred A. Knopf, New York Levinson, D. J. (1986), ”A Conception of Adult Development”, American Psychologist, Vol. 41, No. 1, pp. 3-13 Ornstein, S., Cron, W. L., Slocum, J. W. Jr. (1989), ”Life stage versus career stage: A comparative test of theories of Levinson and Super”, Journal of organizational behaviour, Vol. 10, pp. 117-133 Sears, D. O. (1975), ”Political socialization”, In F.I. Greenstein and N. W. Polsby (Eds.), Handbook of political science, MA: Addison-Wesley Shane, S. (2003), ”A General Theory of Entrepreneurship – The Individual-Opportunity Nexus”, Edward Elgar Publishing, Cheltenham Visser, P. S., Krosnick, J. A. (1998), ”Development of Attitude Strength Over the Life Cycle: Surge and Decline”, Journal of Personality and Social Psychology, Vol. 75, No. 6, pp. 1389-1410 Weber, P., Schaper, M. (2004), ”Understanding the grey entrepreneur”, Journal of Entreprising Culture, Vol. 12, No. 2, pp. 147-164 [less ▲]

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See detailL'office de la Trinité. Liège, Metz, Mayence, Saint-Gall
Close, Florence ULg

Conference (2008, November 20)

L’histoire de l'office de la Trinité a déjà fait couler beaucoup d’encre. Les philologues se sont intéressés à la place du formulaire dans l’histoire des offices versifiés du haut moyen âge, aux sources ... [more ▼]

L’histoire de l'office de la Trinité a déjà fait couler beaucoup d’encre. Les philologues se sont intéressés à la place du formulaire dans l’histoire des offices versifiés du haut moyen âge, aux sources d’inspiration des textes, au principe et à la stratégie d’inspiration ; les musicologues au mode de composition musicale comme au rapport entre les textes chantés et la musique. Par contre, peu a été dit sur la transmission du formulaire – texte et musique confondus – dans l’Eglise occidentale . Cette communication entendait proposer un hypothétique schéma de propagation du formulaire dans la partie orientale de l’ancien empire carolingien, inséré dans une plus large réflexion en cours sur les motifs extra-liturgiques du succès de la première fête votive de l’histoire de la liturgie dans l’Eglise catholique d’Occident. [less ▲]

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See detailDrying of wastewater sludge’s, common practice and challenges
Crine, Michel ULg; Léonard, Angélique ULg

Conference (2008, November 20)

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See detailModelling the Ionosphere over Europe: Investigation of NeQuick Formulation
Bidaine, Benoît ULg; Warnant, René ULg

Conference (2008, November 18)

The modelling of the Total Electron Content (TEC) plays an important role in global satellite navigation systems (GNSS) accuracy, especially for single-frequency receivers, the most common ones ... [more ▼]

The modelling of the Total Electron Content (TEC) plays an important role in global satellite navigation systems (GNSS) accuracy, especially for single-frequency receivers, the most common ones constituting the mass market. For the latter and in the framework of Galileo, the NeQuick model has been chosen for correcting the ionospheric error contribution. It has been designed to calculate the electron density at a given point of the ionosphere according to the time conditions and the solar activity. This electron density can be integrated along the path from the receiver to the considered satellite to provide the TEC. For Galileo, a parameter Az (“effective ionisation level”) will be provided to the model as solar activity information and will be daily updated by the ground stations. Since NeQuick was chosen for Galileo purpose, a new version of the model has been released. It involves simplifications in the representation of the bottomside as well as a unique formula for a key parameter of the topside formulation previously defined through two equations, each one used for six months of the year. Hence we decided to investigate consecutive improvements and remaining weaknesses of this new formulation. To this extent, we take benefit of various ionosphere data from several European stations (Chilton in UK, Dourbes in Belgium, El Arenosillo and Roquetes in Spain, Pruhonice in Czech Republic) where ionosonde and GPS TEC data are available for different solar activity levels. These data allow us to study NeQuick representation of the ionosphere at mid-latitudes. We investigate the difference between GPS-derived vTEC and corresponding values from NeQuick for the latest years (between solar maximum in 2000 and minimum in 2007) in order to observe the temporal dependencies towards Universal Time, season and solar activity. We use ionosonde data to constrain the model so that we can concentrate on its formulation of the profile only. We especially highlight the improvements from the second version of NeQuick and show the critical importance of the topside formulation. [less ▲]

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See detailHypertension artérielle et sport
Krzesinski, Jean-Marie ULg

Conference (2008, November 18)

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See detailDétection de cavités et de racines d’altération par tomographie électrique
Robert, Tanguy ULg

Conference (2008, November 15)

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See detailLa perception sociale des risques: étude de cas sur les champs électromagnétiques en Belgique
Brunet, Sébastien ULg; Delvenne, Pierre ULg; Fallon, Catherine ULg

Conference (2008, November 14)

Dans le cadre de cette étude, nous avons voulu mesurer la perception sociale du risque relatif à l’exposition aux champs électromagnétiques. Notre objectif était d’identifier les modes de connaissances ... [more ▼]

Dans le cadre de cette étude, nous avons voulu mesurer la perception sociale du risque relatif à l’exposition aux champs électromagnétiques. Notre objectif était d’identifier les modes de connaissances auxquels se référent des individus qui font face à un risque empreint d’un niveau élevé d’incertitude scientifique. Comment ce public, mobilisé autour d’une problématique complexe, acquiert-il un niveau d’expertise suffisant pour comprendre les enjeux multiples (sociaux, économiques, éthiques, politiques et environnementaux) d’une technologie sur la société et ses modes d’organisation ? Quelle vision a-t-il des acteurs politiques et subpolitiques (Beck, 2001) qui prennent part aux débats ? Quel niveau de confiance accorde-t-il à un monde politique qui, en cas de risque majeur, pourrait invoquer une démarche précautionneuse et récupérer une partie du pouvoir décisionnel qui semblait lui échapper (Brunet, Delvenne & Joris, 2007) ? En situation de haute incertitude scientifique, qui sont les experts ? Quelle relation entretiennent les différents stakeholders 1 avec les autorités publiques? Le risque électromagnétique constitue un exemple éclairant de nouveau risque technologique, qui suscite une mobilisation sociale particulière et met en évidence les défis technologiques, sociaux, éthiques et politiques que nos sociétés occidentales doivent affronter à l’aube du XXIe siècle. [less ▲]

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See detailCocaïne: Détermination du délai entre le prélèvement et la consommation
De Backer, Benjamin ULg

Conference (2008, November 14)

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Peer Reviewed
See detailO-ARM Symposium
Martin, Didier ULg

Conference (2008, November 14)

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See detailLes instruments de la fiscalité environnementale
Bourgeois, Marc ULg

Conference (2008, November 13)

Detailed reference viewed: 23 (0 ULg)
See detailJules Claskin: l'homme
Baiwir, Esther ULg

Conference (2008, November 13)

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See detailNatural equivariant quantizations
Radoux, Fabian ULg

Conference (2008, November 12)

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See detailEffect of climate change on flood risk along river Ourthe
Dewals, Benjamin ULg; Ernst, Julien ULg

Conference (2008, November 12)

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See detailEffect of climate change on flood risk along river Ourthe
Dewals, Benjamin ULg; Ernst, Julien ULg; Pirotton, Michel ULg

Conference (2008, November 12)

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See detailRobust detection of outlying serum protein electrophoretic profiles in External Quality Assessment schemes
Zhang, Lixin ULg

Conference (2008, November 12)

External Quality Assessment (EQA) schemes are national programmes to ensure that results obtained on a particular specimen in a given clinical laboratory are compatible with those obtained by other ... [more ▼]

External Quality Assessment (EQA) schemes are national programmes to ensure that results obtained on a particular specimen in a given clinical laboratory are compatible with those obtained by other laboratories on the same specimen. EQA schemes are traditionally facing the problem of outlier detection of single analytes, e.g., glucose or cholesterol. Recently, serum protein electrophoresis was tested to be subsequently implemented on a regular basis in EQA programmes. This is a laboratory test which consists of five fractions (albumin, α1, α2, β and γ globulins) and the sum of them is equal to 100% of total proteins. So far, in EQA the five fractions have been analyzed separately as for the univariate analytes, without considering the correlation and the linear relationship between them. The minimum covariance determinant (MCD) estimator (Rousseeuw and van Driessen 1999) provides an interesting robust approach to analyze EQA electrophoresis results from a global standpoint. This talk focuses on comparing the results obtained by the traditional univariate approach and the robust MCD approach (Zhang et al. 2008). As illustrated on electrophoretic data from the Belgian EQA scheme, the MCD approach improves the detection of poor performing laboratories. Simple graphical representation of the outliers will be demonstrated at the end of the talk. [less ▲]

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See detailPharmacology of tiludronate in horses
Delguste, Catherine ULg

Conference (2008, November 08)

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Peer Reviewed
See detailCognitive and affective mechanisms involved in hallucination-proneness
Laroi, Frank ULg

Conference (2008, November 08)

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See detailVenture Creation Intentions and the Seasons of Adult Development
Heuer, Annamaria ULg; Surlemont, Bernard ULg

Conference (2008, November 06)

Objectives: The objective of the paper is to identify the potential impact of different forms of aging (e.g. biological, psychological and psychosocial aging) on entrepreneurial intention. Thus, the key ... [more ▼]

Objectives: The objective of the paper is to identify the potential impact of different forms of aging (e.g. biological, psychological and psychosocial aging) on entrepreneurial intention. Thus, the key focus will be on aging-related changes of attitudes, subjective norms and feasibility perceptions and their influence on intention. Prior work: Numerous studies have applied cognition research-based models to understand the factors that impact entrepreneurial intentions (e.g. Davidsson, 1995; Kolvereid, 1996; Krueger, Reilly and Carsrud, 2000; Autio et al., 2001; Douglas and Shepherd, 2002; Kristiansen and Indarti, 2004). Most scholars, however, have conducted their studies on university students (e.g. Van Gelderen et al., 2006). This choice is mostly motivated by an easier access to data. As a consequence, this may have introduced a bias that underestimates the potential influence of life-stage-related differences on entrepreneurial intention. Approach: The paper will present a literature review of the theories that look at the impact of aging on career intentions (for instance, Lévesque and Minniti, 2006; Ornstein et al., 1989). The approach is to start on the structure of the intentions model (Ajzens’ Theory of Planned Behaviour) as a framework to integrate these pieces of research. Results: This paper is conceptual in nature, transferring important ideas of adult-development to the domain of entrepreneurship. The argumentation will show the differences in perceived desirability and feasibility are related to aging, such as high plasticity of attitude in early adulthood (e.g. Visser et al., 1998), higher change susceptibility in mid-age (Levinson, 1986; Lévesque and Minniti, 2006), and dominant self-limiting roles and decreasing willingness to bear uncertainty in the later eras (Greller, 1995; Shane, 2003). Ultimately, the paper will contribute to formulate hypotheses relating aging stages and possible drivers of entrepreneurial intention. Implications: If the drivers of entrepreneurial intention change according to age, then programmes to stimulate entrepreneurship may have to be adapted according to the target audience. If potential entrepreneurs at later stages such as the “thirties transition” are more susceptible to change, and considering that due to population aging and increasing retirement age in the western world the economic importance of “older” entrepreneur’s is likely to increase, why not stimulate them more? Value: To date, there have only been sporadic, short argumentations for aging-related changes of intentional antecedents. We fill this gap and provide a more rigorous review of this problematic. [less ▲]

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See detailDu sensible au politique : vers une nouvelle approche de l’environnement sonore
Colon, Paul-Louis ULg

Conference (2008, November 06)

Cette communication tente de montrer l’importance d’une étude de la perception ordinaire pour la compréhension des pratiques et des représentations qui organisent l’environnement vécu, en s’attachant plus ... [more ▼]

Cette communication tente de montrer l’importance d’une étude de la perception ordinaire pour la compréhension des pratiques et des représentations qui organisent l’environnement vécu, en s’attachant plus particulièrement à sa dimension auditive. A partir d’une réflexion sur la notion de bruit, une série d’approches de l’environnement sonore aux fondements épistémologiques contrastés seront identifiées. Une interrogation sur les rapports entre perception et politique sera menée à partir de la présentation critique d’un ensemble de recherches issues de la sociologie du quotidien. Des conclusions méthodologiques et épistémologiques pour le prolongement du travail de recherche sur cette question seront finalement dégagées. [less ▲]

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See detailFollow-up on EUCAST
MELIN, Pierrette ULg

Conference (2008, November 06)

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See detailEUCAST: follow-up. What's new? What will happen in 2009
Melin, Pierrette ULg

Conference (2008, November 06)

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See detailIntegrating Succession and Gender Issues from the Perspective of the Daughter of Family Enterprise across the U.S. and EU
Constantinidis, Christina ULg; Nelson, Teresa

Conference (2008, November 04)

We engage a gender analysis, including consideration of the social phenomena of separation and hierarchy, to consider the role, condition and aspirations of daughters of family enterprise. From this ... [more ▼]

We engage a gender analysis, including consideration of the social phenomena of separation and hierarchy, to consider the role, condition and aspirations of daughters of family enterprise. From this perspective we examine the extant literature and present findings from two exploratory empirical research efforts, one in the EU and one in the U.S., to better understand how daughters perceive their leadership paths in the family business internationally. We take into consideration growing social acceptance of women’s leadership, and women’s own career-mindedness, which influence traditional views of the opportunities for daughters inside and outside of the family business. Research avenues and practical recommendations to support successful succession of daughters are discussed. [less ▲]

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See detailTable ronde : La myélopathie cervicarthrosique.
Martin, Didier ULg

Conference (2008, November 02)

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See detailDEVELOPMENT OF A CAPE-OPEN 1.0 SOCKET
Radermecker, Eric; Wising, Ulrika; Dumont, Marie-Noëlle ULg

Conference (2008, November)

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See detailEnjeux et conflits autour de la mobilisation du passé dans les régimes démocratiques
Grandjean, Geoffrey ULg

Conference (2008, November)

This presentation aims to show some stakes and conflicts when past is mobilized in democracies

Detailed reference viewed: 22 (2 ULg)
See detailA West Florida Shelf ROMS model nested in HYCOM: validation, application and data assimilation
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Zheng, L. et al

Conference (2008, November)

A high-resolution regional model for the West Florida Shelf based on ROMS is nested into the GODAE Atlantic and Global HYCOM models. The benefit of using HYCOM boundary conditions instead of climatology ... [more ▼]

A high-resolution regional model for the West Florida Shelf based on ROMS is nested into the GODAE Atlantic and Global HYCOM models. The benefit of using HYCOM boundary conditions instead of climatology is established by comparing the nested model to altimetry, in situ temperature time series, andADCP and high-frequency (HF) radar currents. Jointly with the Fish and Wildlife Research Institute, the model is applied to assist in harmful algae bloom forecasts. The model currents are used to estimate the trajectories of water parcels where red tide organisms have been detected. This system has been able to simulate the onset of the 2005 red tide event. HF Radar Currents are assimilated to improve the shelf circulation. An ensemble simulation of the WFS ROMS model is carried out under different wind forcings in order to estimate the error covariance of the model state vector and the covariance between ocean currents and winds. Radial currents measured by HF Radar antennas near St. Petersburg and Venice, FL, are assimilated using this ensemble-based error covariance. Different assimilation techniques using a time-average ensemble, a filter to reduce surface gravity waves and an extended state vector including wind stress were tested. Results of WFS ROMS model assimilating surface currents show an improvement of the model currents not only at the surface but also at depth. This model is run daily, to provide forecasts for the next 3.5 days. The model predictions and validations are available at http://ocgweb.marine.usf.edu under "WFS Model Forecasts". [less ▲]

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See detailLeadership et genre : une réalité multiculturelle ?
Cornet, Annie ULg; Bonnivert, S.

Conference (2008, November)

Detailed reference viewed: 86 (17 ULg)
See detailDevelopment of a strategy to study toxicodynamic of pollutants in spawning sea turtles from French West Indies (Guadeloupe and Martinique)
Dyc, Christelle ULg; Debier, Cathy; Thomé, Jean-Pierre ULg et al

Conference (2008, November)

Sea turtles including the green turtle Chelonia mydas and the hawksbill turtle Eretmochelys imbricata are critically endangered species, facing different factors as marine pollution. There is a blatant ... [more ▼]

Sea turtles including the green turtle Chelonia mydas and the hawksbill turtle Eretmochelys imbricata are critically endangered species, facing different factors as marine pollution. There is a blatant lack of data dealing with toxicants such as metals and persistent organic pollutants (POPs) in sea turtles. We developed a strategy to apprehend levels, effects and transfer to offspring of several pollutants in sea turtles. Sampling of blood, subcutaneous tissue and eggs of 15 gravid C. mydas and E. imbricata was carried out between July and September 2008 in Martinique (Diamant’s beach) and Guadeloupe (Petite Terre and Marie-Galante). Blood was collected from the dorso-cervical sinus and subcutaneous tissue was sampled in shoulder of the spawning females using a 5 mm biopsy punch (Kai Europe GmbH, Germany). Total blood and serum were successfully taken for metal, POP and biomarker investigations. T-mercury was analyzed by DMA milestones while PCBs, DDT and chlordecone were analyzed by EDC Ni63 high performance gas chromatography HPLC. Samples of serum were analyzed for vitamins (A and E) by HPLC and for thyroid hormones (triiodothyronine and thyroxine) by radioimmunoassay. In parallel to this field study, a cell model using 3T3-L1 cell line was built up to test in vitro effects of PCBs and mercury as well as the relationship between in vitro exposure and fat mobilization. Preliminary results showed a dose-response relationship between increased Aroclor 1234 and 1252 concentrations (0.5 ppb, 1 ppb and 1.5 ppb) and adipocyte mortality (Nucleocounter). The strategy we propose here will bring further insights on levels and potential impact of pollutants on female sea turtles and their offspring. [less ▲]

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See detailLa modernisation de l'administration publique : gérer le changement par/avec/malgré les identités ?
Rondeaux, Giseline ULg

Conference (2008, November)

Au sein de la problématique de la modernisation de l’administration publique, notre propos s’intéresse à l’existence de liens entre un processus de réforme mis en oeuvre dans une administration, et les ... [more ▼]

Au sein de la problématique de la modernisation de l’administration publique, notre propos s’intéresse à l’existence de liens entre un processus de réforme mis en oeuvre dans une administration, et les identités organisationnelles des membres de cette organisation. De tels changements entraînent indubitablement une transformation de multiples aspects de l’administration, tels que ses modes d’organisation, sa politique de GRH, sa manière de concevoir et de remplir ses missions, ses structures, ses référents, etc. Cette transformation suppose la valorisation de modes de fonctionnement, de valeurs et de compétences différents, et a pour résultat un bouleversement de l’identité organisationnelle et des identités professionnelles des membres de cette organisation (Fu et al., 1999; Abrams & Hogg, 1987). Notre objectif est de comprendre et décrire de quelle manière les identités évoluent à la suite de l’introduction de ces nouveaux principes et pratiques dans le contexte de l’administration publique. A partir de données collectées durant deux ans au sein d’un ministère fédéral belge, nous postulons que l’introduction d’une réforme inspirée du New Public Management entraîne une hybridation des logiques identitaires au sein de l’administration publique, mais que par ailleurs, le cours de cette réforme a pu être influencé, à terme, par les logiques identitaires en présence. Au moyen d’une analyse qualitative longitudinale, nous proposons de distinguer 7 profils identitaires, caractérisés par la référence à une logique identitaire (logique de service public, de managérialisme public ou de pragmatisme) et leur positionnement par rapport à leur perception du contexte (congruence ou dissonance). Au travers de notre étude de cas, notre hypothèse d’une co-structuration des identités organisationnelles et du processus de réforme de l’administration nous apparaît comme validée, ainsi qu’en témoigne l’hybridation des logiques identitaires en présence au sein de l’administration étudiée. Nos résultats nous permettent ainsi de supposer une modification des repères identitaires à la suite de la réforme, mais également une réinterprétation de cette réforme au travers du filtre des identités. Notre approche longitudinale révèle par ailleurs les dynamiques identitaires, en identifiant notamment les processus de shift d’un profil à l’autre, et nous conduit à proposer un modèle des dynamiques identitaires contextualisé. Nous sommes également en mesure de montrer quels facteurs produisent (ou sont susceptibles de produire) des shifts identitaires, et le positionnement de chaque profil identitaire à l’égard du changement (1) tel qu’il est vécu et (2) de manière projective. Les facteurs influençant le shift d’un profil identitaire à l’autre sont étroitement liés au concept de motivation. Plusieurs études ont en effet montré la portée de la congruence identitaire (ou identification) sur la construction de l'implication organisationnelle et ses impacts sur les attitudes et comportements des membres de l'organisation, telles que le turnover, la satisfaction, l’implication, la coopération, ou encore l'acceptation du changement (Foreman et Whetten, 2002 ; Ashforth et Mael, 1989 ; Dutton et al. 1994 ; Reger et al., 1998). Ces résultats peuvent conduire à divers prolongements managériaux. En effet, les résultats de notre analyse mettent en évidence l’ampleur des obstacles que les problématiques identitaires peuvent constituer face au changement. Ils font également apparaître des leviers potentiels de changement. Dans la mesure où ils auront pu être identifiés, ces éléments peuvent ultérieurement constituer une base pour le développement d’une approche, de méthodes voire d’outils relatifs à la gestion du changement : utiliser les identités organisationnelles comme indicateur clé voire comme levier de changement. De plus, la diversité des profils identitaires, et leur évolution, amène aussi à réfléchir à des actions managériales différenciées, suivant l’idée qu’il n’existe pas un seul modèle de réduction de la dissonance, et que les leviers à mobiliser pour favoriser la congruence sur le plan identitaire dans un contexte de changement varieront d’un profil à l’autre. Enfin, l’approche interprétative proposée par notre modèle analytique pourrait servi de base pour le développement d’outils de gestion pour encadrer et accompagner les processus de changement au sein d’une organisation. [less ▲]

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See detailStructure and evolution of a main segment boundary along the East Anatolian fault, Turkey 2008
Garcia-Moreno, D.; Hubert, Aurelia ULg; Moernaut, J et al

Conference (2008, November)

Detailed reference viewed: 7 (3 ULg)
See detailAnalysis of the Skyros pony breed: population structure and genetic variability
Bömcke, Elisabeth ULg; Gengler, Nicolas ULg

Conference (2008, November)

Due to its geographic location, Greece is a crossroad between three continents and its mountainous landscape and numerous islands have lead to the creation of many small populations of distinct and ... [more ▼]

Due to its geographic location, Greece is a crossroad between three continents and its mountainous landscape and numerous islands have lead to the creation of many small populations of distinct and isolated breeds. On the basis of phenotypes and genotypes, seven native breeds were identified. The Skyros pony has a distinct phenotype from those of other breeds. This phenotypic difference seems to be linked to the fact that the Skyros pony is less genetically similar to the other Greek breed than the other breeds are to each other as shown in previous studies. Furthermore, the Skyros pony breed risk status is described as endangered according to the criteria of the Food and Agricultural Organization (DAD-IS). The main reason is that the population is concentrated only in three herds of reduced size. This study analyses the population structure and describes the genetic variability of the breed using 15 microsatellite markers and available genealogical information. The molecular characterization and the pedigree were also used to investigate the presence of bottleneck. Factorial correspondence analysis and analysis of molecular variance showed that the three herds seemed to be genetically distinct even if the genetic variance between herds was low (5.75%). For the whole population, the mean total number of allele per locus was 5.93. The average Polymorphism Information Content value was relatively high (~ 0.60) as the observed heterozygosity (0.64) and the expected heterozygosity (0.62). The comparison with other studies showed that these values were well within the range for domestic horses but were at the lower end of that range, i.e. with the values from breeds with small population size or recent bottlenecks. However, these values indicated a still substantial genetic diversity in the Skyros breed that could be useful for planning future breeding strategies for the breed conservation. This is consistent with the results of various bottleneck tests, which detected no evidence of bottleneck when considering the whole population but suggested that there was bottleneck in two of the three main herds of Skyros pony. Comparisons between DNA-based and pedigree-based results showed that the loss of genetic diversity has probably occurred before the beginning of breed registration. [less ▲]

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See detailSeismic patterns of the Anatolian fault system (Turkey)
Hubert, Aurelia ULg; Fraser, J.; Boes, X et al

Conference (2008, November)

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See detailA droplet of spectroscopy
Terwagne, Denis ULg; Gilet, Tristan ULg; Vandewalle, Nicolas ULg et al

Conference (2008, November)

Droplet coalescence in a liquid bath can be delayed by oscillating the surface of the bath vertically (frequency from 20 Hz to 400 Hz), the droplet bounces on the interface [1,2]. A low viscous oil ... [more ▼]

Droplet coalescence in a liquid bath can be delayed by oscillating the surface of the bath vertically (frequency from 20 Hz to 400 Hz), the droplet bounces on the interface [1,2]. A low viscous oil droplet is dropped on a high viscous oil bath. We observe that the conditions for bouncing depends on the frequency, more precisely we observe resonance when the eigenfrequency of the droplet is excited. In some conditions, droplet presents a non axi-symmetric mode of deformation. That leads to a rotation of the drop and to a horizontal displacement. [less ▲]

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See detailCaractère bifonctionnel d'une prényltransférase de pucerons
Cusson, Michel; Vandermoten, Sophie ULg; Charloteaux, Benoit et al

Conference (2008, November)

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See detailDefect growth in model panel paintings by full field interferometry
Kouloumpi, E.; Moutsatsou, A.; Torres, L. et al

Conference (2008, November)

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See detailGalileo Local Component for the detection of atmospheric threats
Warnant, René ULg; Wautelet, Gilles ULg; Lejeune, Sandrine et al

Conference (2008, November)

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See detailInterférométrie holographique photoréfractive : nouveaux développements et applications récentes
Thizy, Cédric ULg; Georges, Marc ULg; Hustinx, Guy-Michel et al

Conference (2008, November)

Les cristaux photoréfractifs permettent l'enregistrement holographique dynamique in-situ et une réutilisabilité infinie. Aussi ils possèdent des propriétés spécifiques que d'autres matériaux ... [more ▼]

Les cristaux photoréfractifs permettent l'enregistrement holographique dynamique in-situ et une réutilisabilité infinie. Aussi ils possèdent des propriétés spécifiques que d'autres matériaux holographiques n'ont pas et qui peuvent être utilisées de manière avantageuse en interférométrie holographique. Depuis 15 ans, le CSL développe des techniques d'interférométrie holographique et des instruments basés sur des cristaux de Bi12SiO20 (BSO). Le comportement dynamique de ces derniers permet une grande souplesse d'utilisation de l'interférométrie holographique, à l'instar des techniques basées sur l'enregistrement numérique, tout en fournissant des interférogrammes de meilleure résolution que celles-ci (pas de bruit de speckle, pas de filtrage nécessaire). Par le passé, nous avons déjà présenté une large gamme d'applications en métrologie, contrôle non destructif et mesures vibratoires. Ici nous présentons des applications industrielles récentes obtenue avec une caméra holographique photoréfractive commercialisée. Cette dernière a été utilisée avec succès dans des applications très demandeuses, notamment en terme de résolution. [less ▲]

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See detailKuzey Anadolu Fayı Üzerinde Yer Alan Sığ Göllerde Tarihsel Depremlerin Sedimantolojik İzlerinin Araştırılması
Avsar, Ulas; Boes, X; Hubert, Aurelia ULg et al

Conference (2008, November)

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See detailEtude de la technique LIBS en vue du tri des vitrocéramiques dans les déchets verriers
Georges, Marc ULg; Carapelle, Alain ULg; Mombaerts, Johan et al

Conference (2008, November)

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See detailCoherent metrology in impact assessment of movable artwork: the MULTIENCODE project
Tornari, V.; Bernikola, E.; Osten, W. et al

Conference (2008, November)

Detailed reference viewed: 23 (0 ULg)
See detailDetermination of the tortuosity of porous materials from binary or grey-tone tomographic reconstructions
Gommes, Cédric ULg; Almazan, Maria del Carmen; Léonard, Angélique ULg et al

Conference (2008, November)

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See detailMulti-scale spatial variability of amphipod assemblages from the foliar stratum of the Posidonia oceanica (L.) Delile meadow
Sturaro, Nicolas ULg; Lepoint, Gilles ULg; Michel, Loïc ULg et al

Conference (2008, October 31)

Studying spatial patterns is of ecological importance in order to understand the causes of the distribution and abundance of organisms, and it also provides valuable basis for management and conservation ... [more ▼]

Studying spatial patterns is of ecological importance in order to understand the causes of the distribution and abundance of organisms, and it also provides valuable basis for management and conservation. In the Mediterranean coastal zone, the Posidonia oceanica seagrass meadows constitute one of the dominant ecosystems and are an important habitat for vagile invertebrates. Among these, amphipods comprise a large number of species, with considerable abundance and biomass, as well as being an important trophic resource for fish populations. Until now, little attention has been given to the horizontal variability at different spatial scales of amphipod assemblages associated with P. oceanica meadows. A hierarchical sampling design, spanning three orders of magnitude (from 1 to 100s of metres) was elaborated. Sampling was undertaken in March 2007 in the meadows of Calvi Bay (NW Corsica), at depths ranging from 10 to 13 m, using a suction sampler. Our results indicated an important horizontal variability of the studied assemblage, and this at different spatial scales. In addition, these results tend to show that the small scale (~ 1 m and ~ 10 m) influenced abundance, while the medium-scale (~ 100 m) influenced diversity. Some potential causes of the observed patterns are discussed. These results emphasize the importance of considering different spatial scales in the study of the vagile invertebrates associated with P. oceanica meadows. [less ▲]

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See detailHelping Teachers Gain Autonomy in Online Course Design and Implementation
Van de Poël, Jean-François ULg; Lecomte, Béatrice ULg

Conference (2008, October 31)

We consider that providing a variety of flexible services and access to resources and training is one of the keys to helping teachers gain autonomy in the design and implementation of an online course. So ... [more ▼]

We consider that providing a variety of flexible services and access to resources and training is one of the keys to helping teachers gain autonomy in the design and implementation of an online course. So far, our system has helped initiate 176 online courses over the past two years. [less ▲]

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See detailTrophic diversity among amphipod crustaceans from Posidonia oceanica meadows : A stable isotope assessment
Michel, Loïc ULg; Lepoint, Gilles ULg; Gobert, Sylvie ULg et al

Conference (2008, October 31)

Vagile invertebrates are regarded as key-components of Posidonia oceanica meadow ecosystems, particularly in organic matter transfers from primary producers to higher level consumers. Among these ... [more ▼]

Vagile invertebrates are regarded as key-components of Posidonia oceanica meadow ecosystems, particularly in organic matter transfers from primary producers to higher level consumers. Among these invertebrates, amphipod crustaceans are one of the most abundant and diverse groups, and probably play an important role in meadow ecosystem functioning. However, their trophic ecology is poorly known, and these crustaceans are generally regarded as vegetal epiphytes consumers or generalist detritivores, due to the lack of accurate studies. Here, we focused on the study of the interspecific trophic diversity, and on the importance of other food sources (Posidonia leaves and litter, animal epiphytes, suspended particular organic matter, …) in those amphipods’ diet. To assess these phenomena, we used stable isotopes ratios of carbon and nitrogen as trophic tracers. It appears that, while some species (such as Apherusa chiereghinii and Aora spinicornis) seem to feed mainly on epiphytes, others, like Dexamine spiniventris, exploit different food sources. These results thus tend to show that amphipod trophic diversity could have been underestimated in the past. Moreover, they enhance the comprehension of the feeding ecology of these animals, and therefore of the way they interact with the Posidonia meadow ecosystem. [less ▲]

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See detailNew insights in mammalian auditory organ development
Thelen, Nicolas ULg; Malgrange, Brigitte ULg; Thiry, Marc

Conference (2008, October 30)

Although the structure of the auditory organ in mature mammals, the organ of Corti, is clearly established, its development is far from being elucidated. Using cytochemical and immunohistochemical methods ... [more ▼]

Although the structure of the auditory organ in mature mammals, the organ of Corti, is clearly established, its development is far from being elucidated. Using cytochemical and immunohistochemical methods at the light and electron microscope levels, we examined its spatiotemporal development in rats from embryonic day 16 (E16) to E19. At E16, whatever the region of the cochlear studied (base, middle, apex), the organ of Corti was not present. We demonstrate that the organ of Corti develops from a non-proliferative cell zone that is located in the junctional region between the greater epithelial ridge and the lesser epithelial ridge of the cochlear duct and that is characterized by the presence of numerous microvilli. Using the periodic acid-thiocarbohydrazide-silver proteinate method, we revealed that the first cells to develop in this zone are the inner pillar cells, a particular type of nonsensory supporting cells. They arise in the base of the cochlear duct at the boundary between the two ridges at E16. The cell differentiation in this prosensory region continues according to a base-to-apex gradient, the inner hair cells appearing in the greater epithelial ridge at E17 and the outer hair cells in the lesser epithelial ridge at E18. At E19, all the different cell types of the organ of Corti are well in place. We also showed that the development of the inner pillar cells within the prosensory region does not involve Notch1 signaling. These results highlight the central role that the inner pillar cells could play in the development of the organ of Corti. [less ▲]

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See detailLes identités d'après la théorie des discours (Laclau, Mouffe)
Spinoy, Erik ULg

Conference (2008, October 29)

This papers presents the way identity/difference is conceived of in discourse theory, and especially in the work of Ernesto Laclau and Chantal Mouffe.

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See detailStimuli-responsive surfaces by electrografting
Jérôme, Christine ULg

Conference (2008, October 28)

The design of stimuli-responsive coatings on a variety of solid surfaces is the topic of increasing researches. In this area, the adhesion of a stimuli-responsive polymer to the inorganic support whatever ... [more ▼]

The design of stimuli-responsive coatings on a variety of solid surfaces is the topic of increasing researches. In this area, the adhesion of a stimuli-responsive polymer to the inorganic support whatever the conditions of pH and temperature, remains a concern. In this field, we have been studying an electrochemical process able to initiate the polymerization of acrylic derivatives together with promoting their chemisorption to the substrate used as electrode. We have demonstrated the versatility of this method that can be applied to a variety of acrylics leading to the possible generation of responsive coatings to either pH or temperature. Reversible anchoring of molecules of interest has also been achieved recently by this method based on the grafting of dienes able to bind a dienophile and release it at higher temperature by retroDiels-Alder reaction. The electroinitiation has been found compatible with a variety of surfaces going from conventional metals (iron, steel, gold) to carbon (fibers and nanotubes) and semi-conductors (doped-silicon), which spreads the applications to various fields such as medical devices, biosensors, catalysis, electronics and photovoltaics. Particularly, the application of this process to AFM tips allows the straightforward functionalization of these devices allowing not only the handling of polymers at the molecular level but also the elaboration of various temperature, pH or analyte sensitive sensors at the nanometer scale. [less ▲]

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See detailEnvironment and forced migration: a policy-relevant research approach
Gemenne, François ULg

Conference (2008, October 28)

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See detailL'ambigua vitalità del personaggio d'Annunzio
Benzoni, Pietro ULg

Conference (2008, October 24)

Detailed reference viewed: 9 (1 ULg)
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See detailL’hémorragie cérébrale : le coup de tonnerre dans un ciel serein
Martin, Didier ULg

Conference (2008, October 23)

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See detailNa et K anormaux : A quoi faut-il penser?
Krzesinski, Jean-Marie ULg

Conference (2008, October 23)

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See detailImportance of pigtailed macaques (Macaca nemestrina leonina) in seed dispersal: Impact on the ecological balance of the tropical rainforest at Khao Yai National Park, Thailand
Albert, Aurélie ULg; Huynen, Marie-Claude ULg

Conference (2008, October 22)

The tropical rain forest is maintained thanks to a precarious balance placed under the yoke of interactions between the various animal and plant species which compose it. Among them we can find those ... [more ▼]

The tropical rain forest is maintained thanks to a precarious balance placed under the yoke of interactions between the various animal and plant species which compose it. Among them we can find those implying plants and frugivores. Today, no study was still undertaken on the pigtailed macaques (Macaca nemestrina leonina) because they are considered seed predator. However, recent studies showed that it could actually be a key-species in the dispersion of many plant species. The study will take place in the Khao Yai National park (2,168 km²), Thailand. We will follow a troop of forty individuals habituated to humans and already well-known. Our goal will be to establish the importance of the pigtailed macaques in the maintenance and the regeneration of the tropical rain forest. Thus we will try to evaluate their capacity of being good seed dispersers. In this purpose we will study: 1) the spatiotemporal distribution, the productivity and the characteristics of the plant species present on the home range of the studied troop, 2) the ranging patterns of the macaques within their home range, 3) their feeding behaviour, notably the fruit selection and the various modes of processing seeds, and finally 4) their impact on the viability and the germination potential of seeds. The study of seed dispersal by these macaques would enable us to step further into the understanding of this environment and, perhaps, to improve the destiny of the pigtailed macaques, species now characterized as “vulnerable”, in recognizing them a paramount role in the conservation of their habitat. [less ▲]

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See detailDebates on osteoporosis management
Bruyère, Olivier ULg

Conference (2008, October 18)

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See detailPratique de la pharmacie clinique: Expérience en Gériatrie
Van Hees, Thierry ULg

Conference (2008, October 18)

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See detailAbout the regularity and the irregularity of some nondi erentiable functions
Nicolay, Samuel ULg

Conference (2008, October 17)

We study the Hoelder regularity of some "historical" nondifferentiable functions

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See detailLes capacités, un nouvel étalon pour évaluer les inégalités ?
Orianne, Jean-François ULg; Verhoeven, Marie

Conference (2008, October 17)

Detailed reference viewed: 18 (2 ULg)
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See detailDroits, base informationnelle et action publique
De Munck, Jean; Orianne, Jean-François ULg; Salais, Robert

Conference (2008, October 17)

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See detailVacillating between the Universal and the Particular
Spinoy, Erik ULg

Conference (2008, October 17)

This paper discusses the recent trend to privilege the particular over the universal, and points out that, while it is true that all universality is 'stained' by the particular, the particular itself is ... [more ▼]

This paper discusses the recent trend to privilege the particular over the universal, and points out that, while it is true that all universality is 'stained' by the particular, the particular itself is unthinkable without a reference to the universal. This is exemplified by a number of cases from philosophy, cultural theory and literature. [less ▲]

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See detailApport de la caméra à haute vitesse en comparaison avec la stroboscopie.
Remacle, Marc; Morsomme, Dominique ULg

Conference (2008, October 14)

Introduction:La stroboscopie est indispensable au bilan des troubles de la voix affectant les cordes vocales. Elle est toutefois basée sur la reconstitution d'une image de représentant pas la réalité. Sur ... [more ▼]

Introduction:La stroboscopie est indispensable au bilan des troubles de la voix affectant les cordes vocales. Elle est toutefois basée sur la reconstitution d'une image de représentant pas la réalité. Sur ce plan la caméra à haute vitesse permettant d'observer des cycles vibratoires réels lui est supérieure. Les problèmes techniques: coût, stockage et traitements des images .. n'ont pas permis sa diffusion et son emploi en phoniatrie clinique.Nous présentons la comparaison des enregistrements obtenus avec la caméra à haute vitesse Wolf avec ceux acquis avec le stroboscope (strobobase) de la même firme.Matériels et méthodes: La caméra à haute vitesse Wolf (Knittlige, Allemagne) permet d'enregistrer des séquences de 2 sec soit de 4000 ou de 2000 images/s. L'enregistrement est en couleur. L'examinateur peut choisir parmi ces 2 sec une séquence pertinente pour stockage dans le disque dur et analyse complémentaire. Les analyses complémentaires sont essentiellement la kimographie et la mesure de l'écartement du bord libre des cordes vocales au cours de la séquence. Cette dernière mesure est traduite de manière graphique, évoquant l'électroglottographie. La mesure est faite simultanément à la partie antérieure médiane et postérieure des cordes vocales. Le strobosbase est basé sur un système de shutter activé classiquement par un microphone de contact. Trente cinq patients représentant l'ensemble de la pathologie bénigne des cordes vocales ont été enregistrés successivement avec les deux systèmes. La qualité de l'image, la contribution au diagnostic et au traitement ont été observées avec les deux systèmes. Résultats: Dans tous les cas, la qualité de l'image stroboscopique est nettement supérieure à celle de la caméra à haute vitesse. Celle-ci ne disposant pas d'assez de pixels. Dans aucun cas la caméra à haute vitesse n'a modifié le diagnostic. La caméra à haute vitesse apporte toutefois des renseignements supérieurs à la stroboscopie en cas de béance glottique (paralysie, encoche, presbyphonie, ...). Grâce à la kymographie et à l'analyse de l'écartement des cordes vocales. Sur dix sept cas de béances glottiques, la décision thérapeutique a été modifiée 4 fois après examen à la caméra à haute vitesse. Discussion: La caméra à haute vitesse de modèle Wolf ne peut remplacer la stroboscopie dans l'état présent. Elle est un complément utile pour l'étude des béances glottiques en permettant une meilleure observation des phases d'ouverture et de fermeture. Elle contribue ainsi à la décision thérapeutique. Le choix subjectif d'une séquence parmi les deux enregistrées peut être un biais important. [less ▲]

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See detailNASS Congress
Martin, Didier ULg

Conference (2008, October 14)

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See detailEvaluation subjective de la voix (VHI) chez 723 enseignants en région Bruxelloise.
Morsomme, Dominique ULg; Russel, Sophie; Jamart, Jacques et al

Conference (2008, October 14)

Les études montrent qu’en moyenne 20% des enseignants présentent des troubles vocaux. Les auteurs relèvent des symptômes fréquents comme la raucité, la fatigue vocale, l’aggravation de la voix, les ... [more ▼]

Les études montrent qu’en moyenne 20% des enseignants présentent des troubles vocaux. Les auteurs relèvent des symptômes fréquents comme la raucité, la fatigue vocale, l’aggravation de la voix, les douleurs péri-laryngées et la sensation d’inconfort physique. Ils rapportent que la dysphonie est plus fréquente chez les femmes. L’âge, le nombre d’années d’expérience, le type de cours enseigné les facteurs environnementaux, l’abus, le malmenage vocal et le stress ont un impact sur la voix. Ces facteurs amenuisent les performances vocales professionnelles des enseignants et ont des conséquences non négligeables en terme d’économie. Dans notre étude, nous avons évalué la voix de 723 enseignants (F :634/ H :89), exerçant en écoles ordinaires ou en écoles à discrimination positive, à l’aide du VHI. Nous avons établi un premier état des lieux dans 15 communes de la région bruxelloise. Des mesures de fiabilité, de pertinence et de cohérence ont été réalisées. Nous obtenons une bonne fiabilité test-retest (F : 0,774 ; E : 0.749 ; P : 0.806 ; G : 0.836 – p>0.001 pour tous). Les scores du re-test sont significativement inférieurs pour les 3 sous-échelles (F p<0.001 ; E p=0.003 et P p<0.001) et le score global (p<0.001). La corrélation entre les 3 sous échelles est élevée (FvsE : 0.434 ; FvsP :0.455 ; EvsP : 0.527). La prévalence des troubles vocaux a été calculée en tenant compte des variables antécédents ORL, logopédiques et des traitements logopédiques en cours. Elle s’élève à 10,5%. Les enseignants ayant été confronté à une difficulté vocale (vu par un ORL ou/et un logopède) présentent donc des scores plus élevés au VHI global. Par contre, nous observons que plus les sujets sont âgés et ont de l’expérience moins ils ont de troubles vocaux (p=0.026 et p=0.013). De même, les variables telles que le genre (p≥ 0.063), la matière enseignée (p≥ 0.468), le fait de fumer (p=0.757), le type (p≥ 0.867) et le degré d’enseignement (p≥ 0.212) n’influent pas de manière significative les scores aux V.H.I. [less ▲]

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See detailALADDIN performance model
Absil, Olivier ULg

Conference (2008, October 13)

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See detailFrom Bio to Nano: Learning From The Past to Shape the Future of Technology Assessment
Delvenne, Pierre ULg; Fallon, Catherine ULg; Thoreau, François ULg et al

Conference (2008, October 12)

In many Western countries over the last 35 years, the quest for more scientific governance on <br />crucial technological issues led to a broadening of the political world’s sphere of competences. <br ... [more ▼]

In many Western countries over the last 35 years, the quest for more scientific governance on <br />crucial technological issues led to a broadening of the political world’s sphere of competences. <br />Indeed, various countries decided that dealing with global, invisible, irreversible and irreparable <br />risks had to be handled by an appropriate tool of management of technological innovations. So the <br />usefulness to institutionalize parliamentary Technology Assessment (PTA) offices emerged. <br />Nowadays, PTA is an instrument particularly suitable to study the new shape of science and <br />society’s interface and it represents a remarkable attempt to reform the institutional settings of <br />innovation. <br />However, while the overall uncertainty surrounding science and technology has been used by public <br />actors like parliamentarians or ministers in the past to legitimize a first generation of PTAs, the <br />emergence of a second generation in the 1990’s – centred on the constructive, interactive or <br />participatory TA approches – emphazises the co-evolution of technology and society rather than the <br />former linear determinist rationale. In this context, the STS community of scholars is increasingly <br />called upon by the public authorities to provide a “professional service role” (RIP, 1994), that is to <br />say to take a step into action out of the border of their intellectual engagement. <br />Then, we suggest to compare two successive periods by looking at the institutional management of <br />two distinct-but-complementary technological issues: biotechnology and nanotechnology. The <br />former has been taken into account by public actors at a time when the second generation of PTAs <br />was not yet rooted in the political practices. Thus, the management of the public debate related to <br />biotechnology has been characterized by a lack of sensitive, fruitful and interactive communication <br />between the stakeholders involved in the TA process, while the first applications were already being <br />commercialized. On the other hand, the latter is currently being tackled at a moment when the social <br />shaping of technology is widely acknowledged as well as the STS community may be invited to <br />pass from observation to participation in the political sphere. Given the uncertainty and complexity <br />encircling nanotechnology as well as its huge potential in many interconnected disciplinary fields, <br />the need to avoid the pitfall of the biotechnology’s experience is commonly accepted. <br />We offer to take nanotechnology as one of the most challenging technological issue to look beyond <br />the biotechnology’s roadblock and to show in which proportion the same scenario is reasonably <br />thinkable today, in order to spotlight whether we have learnt from the past in considering what is <br />1 <br />sometimes called “a new industrial revolution”. <br />We will raise some research questions like: how different are current TA practices as compared to <br />former ones? Are there new regimes emerging? Given the current technological convergence, how <br />complicated would it be to deal with NBIC technologies if we missed the point with biotechnology <br />alone? How suitable is PTA to engage in such interdisciplinary issues? Are we assisting the <br />emergence of a third PTA generation around the growing role of the STS community? How does <br />this scientific community dialogue with the historians of science who analyzed the earlier industrial <br />revolutions? [less ▲]

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See detailIRM interventionnelle : vers une neuronavigation en temps reel
Martin, Didier ULg

Conference (2008, October 11)

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See detailIR and UV Spectroscopy of DNA Ions Stored in Trap Instruments
Gabelica, Valérie ULg

Conference (2008, October 11)

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See detailTransplantation hépatique à partir de donneurs cadavériques à coeur arrêté: expérience multicentrique belge de 58 cas sur 5 ans
Detry, Olivier ULg; Rahmel, Axel; Donckier, Vincent et al

Conference (2008, October 11)

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