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See detailOverlay Routing using Coordinate Systems
Cantin, François ULg; Gueye, Cheikh Ahmadou Bamba ULg; Kaafar, Mohamed Ali ULg et al

Poster (2008, December)

We address the problem of finding indirect overlay paths that reduce the latency between pairs of nodes in an overlay. To this end we propose to rely on an Internet Coordinate System (ICS), namely Vivaldi ... [more ▼]

We address the problem of finding indirect overlay paths that reduce the latency between pairs of nodes in an overlay. To this end we propose to rely on an Internet Coordinate System (ICS), namely Vivaldi, to estimate RTTs and help find these interesting detours. We define two initial criteria to illustrate our approach and assess their true/false positive rates. [less ▲]

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See detailImpact of medication non-compliance and non-persistence on pharmacoeconomic evaluations in osteoporosis
Hiligsmann, Mickaël ULg; Rabenda, Véronique ULg; Gathon, Henry-Jean ULg et al

in Osteoporosis International (2008, December), 19(S2), 282

Detailed reference viewed: 39 (13 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)

Detailed reference viewed: 121 (22 ULg)
See detailEnjeux et conditions de l'enseignement des langues dans les universités
Defays, Jean-Marc ULg

Conference (2008, December)

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See detailA Self-Organized clustering scheme for overlay networks
Cantin, François ULg; Gueye, Cheikh Ahmadou Bamba ULg; Kaafar, Mohamed Ali ULg et al

in Lecture Notes in Computer Science (2008, December), 5343

Hierarchical approaches, where nodes are clustered based on their network distances, have been shown to allow for robust and scalable topology-aware overlays. Moreover, recent research works have shown ... [more ▼]

Hierarchical approaches, where nodes are clustered based on their network distances, have been shown to allow for robust and scalable topology-aware overlays. Moreover, recent research works have shown that cluster-based deployments of Internet Coordinates Systems (ICS), where nodes estimate both intra-cluster and inter-cluster distances, do mitigate the impact of Triangle Inequality Violations (TIVs) on the distance predictions, and hence offer more accurate internet latency estimations. To allow the construction of such useful clusters we propose a self-organized distributed clustering scheme. For better scalability and efficiency, our algorithm uses the coordinates of a subset of nodes, known by running an ICS system, as first approximations of node positions. We designed and evaluated two variants of this algorithm. The first one, based on some cooperation among nodes, aims at reducing the expected time to construct clusters. The second variant, where nodes are selfish, aims at reducing the induced communication overhead. [less ▲]

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See detailSedimentological fingerprints of recent earthquakes in lake sediments: A case study on the North Anatolian Fault (NAF), Turkey
Avsar, Ulas; Boes, X; Hubert, Aurelia ULg et al

in EOS : Transactions, American Geophysical Union (2008, December), 89(53)(Fall Meet. Suppl.), 21-1919

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See detailLes cultes isiaques à Argos. Du mythe à l'archéologie
Veymiers, Richard ULg

Conference (2008, November 29)

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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 detailMonitoring the motion of a macrocycle in a bistable molecular shuttles
Lussis, Perrine ULg; Fustin, Charles-André; Bertocco, Andrea et al

Poster (2008, November 28)

In recent years it has been proved possible to design synthetic molecular systems in which positional displacements of sub-molecular components occur upon the application of external stimuli.[1-4] Through ... [more ▼]

In recent years it has been proved possible to design synthetic molecular systems in which positional displacements of sub-molecular components occur upon the application of external stimuli.[1-4] Through the pioneering work of Stoddart, Sauvage and others[1-3] it has become clear that the remarkable ability of rotaxanes to change the relative positions of their interlocked components in response to various external stimuli (light, electrons, heat, pH, nature of the environment) should one day find practical uses. However, truly functional systems based on synthetic molecular machines are still to be produced. Some key questions remain unanswered: What are the structural features necessary for molecules to convert this controlled motion into useful function? At what level (single molecule, nanoscopic, microscopic, macroscopic) can this be done? Can we address and utilize the induced-motion in a single molecular machine? To answer those questions we are advocating the use of molecular machines coupled to a polymeric scaffold. We are convinced that this is an efficient route to translate the sub-molecular motion into a useful response that can be exploited to perform physical tasks. Molecular machines with mechanically interlocked architectures are particularly suited for these sorts of applications because, they permit the controlled, large amplitude, movement and positioning of one mechanically interlocked component with respect to another. Among these architectures, rotaxanes -i.e. molecules consisting of a macrocycle threaded on a linear molecule capped with bulky end stoppers- are a particularly promising kind of synthetic molecular 'shuttles'. Our objective is to demonstrate the feasibility of transducing the controlled translational motion of the ring in a rotaxane into mechanical work using AFM-based single molecule force spectroscopy as a mechanical device.[5] For that purpose, a bistable hydrogen-bonded rotaxane with one fumaramide and one succinic amide ester station was synthesized. The equilibrium distribution of the ring between the two stations is in favour of the fumaramide station (>95%).[6] We have attached a poly-ethylene oxide (PEO) chain to the ring by 'click chemistry' and the resulting rotaxane-polymer compound was grafted onto gold substrates. We then fished the PEO chain with an AFM tip. The applied force exerted on the ring when pulling on the polymer chain causes the H bonds linking the ring to the fumaramide station to break, but when trying to move away the ring, it shuttles back to its station in the opposite direction of the pulling force. We estimated that the work done by the ring against the pulling force was about 3 kcal mole-1. This result is in good agreement with the theoretical value predicted by Altieri et. al.[6] [1] Special Issue on Molecular Machines, Acc. Chem. Res. 2001, 34, p. 409-522. [2] V. Balzani, A. Credi, M. Venturi, Molecular Devices and Machines – A Journey into the Nano World, Wiley-VCH, Weinheim, Germany, 2003. [3] E R Kay, D A Leigh and F Zerbetto, Angew. Chem. Int. Ed. 2007, 46, 72. [4] a) V Bermudez, N Capron, T Gase, F G Gatti, F Kajzar, D A Leigh, F Zerbetto and S Zhang, Nature, 2000, 406, 608. b) A M Brouwer, C Frochot, F G Gatti, D A Leigh, L Mottier, F Paolucci, S Roffia, G W H Wurpel, Science , 2001, 291, 2124. c) D A Leigh, J K Y Wong, F Dehez and F Zerbetto, Nature, 2003, 424, 174. d) J V Hernandez, E R Kay and D A Leigh, Science, 2004, 306, 153. e) E R Kay and D A Leigh, Nature, 2006, 440, 286. f) V Serreli, C-F Lee, E R Kay and D A Leigh, Nature, 2007, 445, 523. [5] T. Hugel, N. B. Holland, A. Cattani, L. Moroder, M. Seitz, H. E. Gaub, Science 2002, 296, 1103. [6] A. Altieri, G. Bottari, F. Dehez, D A Leigh, J.K.Y Wong, F Zerbetto, Angew. Chem. Int. Ed. 2003, 42, 2296. [less ▲]

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

Conference (2008, November 28)

Detailed reference viewed: 45 (7 ULg)
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See detailTowards Another Summer
Delrez, Marc ULg

Conference (2008, November 28)

Detailed reference viewed: 7 (0 ULg)
See detailElectrografting of thermo-responsive polymer films on conducting surfaces
Gabriel, Sabine; Stach, M.; Confortini, O. et al

Poster (2008, November 28)

Detailed reference viewed: 30 (2 ULg)
See detailNew strategies to prepare melt processable polymer-grafted gold nanoparticles
Alexandre, Michaël ULg; Abetz, Volker; Boschetti-de-Fierro, A. et al

Poster (2008, November 28)

Detailed reference viewed: 35 (6 ULg)
See detailPreparation and characterization of thermoresponsive iron nanoparticles for biomedical applications
Sibret, Pierre ULg; Aqil, Abdelhafid ULg; Gohy, Jean-François et al

Poster (2008, November 28)

Detailed reference viewed: 29 (4 ULg)
See detailStimuli responsive nanogels for targeted drug delivery
Jérôme, Christine ULg

Conference (2008, November 28)

Detailed reference viewed: 19 (4 ULg)
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See detailCe que les NAC nous apprennent sur la médecine factuelle
Vandeweerd, Jean-Michel; Vandenput, Sandrina ULg

Conference (2008, November 28)

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See detailPolymer membrane by electrospinning
Aqil, Abdelhafid ULg; Grignard, Bruno ULg; Croisier, Florence ULg et al

Poster (2008, November 28)

Detailed reference viewed: 48 (9 ULg)
See detailSummary of aim and achievements in Work Package 7 "Functional Coatings"
Jérôme, Christine ULg

Conference (2008, November 28)

Detailed reference viewed: 12 (3 ULg)
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See detailLe Childhood Anxiety Sensitivity Index-Revised (CASI-R) : Etude de validation.
Stassart, Céline ULg; Depauw, Brigitte; Delvaux, Muriel ULg et al

Poster (2008, November 28)

La sensibilité à l'anxiété est la peur des sensations corporelles liées à l’anxiété, qui proviendrait de croyances que ces sensations ont des conséquences somatiques, psychologiques ou sociales néfastes ... [more ▼]

La sensibilité à l'anxiété est la peur des sensations corporelles liées à l’anxiété, qui proviendrait de croyances que ces sensations ont des conséquences somatiques, psychologiques ou sociales néfastes. Ce concept a été très peu exploré dans le contexte infantile. L’AS étant considérée comme un facteur de risque dans le développement et le maintien des troubles anxieux, ceci montre l’intérêt de s’intéresser davantage à l’outil d’évaluation de l’AS dans le contexte infantile, le Childhood Anxiety Sensitivity Index revised. L'objectif de cette étude est de d'évaluer les propriétés psychométriques de la version française de la CASI-R auprès d'un échantillon de 60 enfants âgés de 10 à 11 ans. En ce qui concerne les résultats, la confrontation de la CASI-R aux qualités psychométriques nous fournit des premiers éléments en faveur de l’intérêt clinique et de la pertinence théorique de cet outil dans le contexte infantile. En ce sens, la poursuite de son développement paraît constituer une perspective intéressante. [less ▲]

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See detailA Lilliputian lignophyte from the Lower Devonian?
Gerrienne, Philippe ULg; Strullu-Derrien, C.; Steemans, Philippe ULg

Conference (2008, November 27)

Detailed reference viewed: 14 (1 ULg)
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)

Detailed reference viewed: 31 (1 ULg)
Peer Reviewed
See detailNon rigid stabilization of the spine.
Martin, Didier ULg

Conference (2008, November 21)

Detailed reference viewed: 2 (1 ULg)
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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’enfance comme champ d’intervention politique au Burkina Faso
Wouango, Joséphine ULg

Conference (2008, November 21)

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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)

Detailed reference viewed: 35 (11 ULg)
See detailL’architecture des couvents des Annonciades célestes en Belgique et projet de recherche doctoral
Piront, Julie ULg

Conference (2008, November 20)

Cette intervention a livré d'une part les sources, la méthodologie et les résultats de mon mémoire de licence sur l'étude architecturale des couvents "belges" des annonciades célestes et présente d'autre ... [more ▼]

Cette intervention a livré d'une part les sources, la méthodologie et les résultats de mon mémoire de licence sur l'étude architecturale des couvents "belges" des annonciades célestes et présente d'autre part le projet de recherche de ma thèse de doctorat qui envisage l'architecture de l'ensemble des couvents de cet ordre religieux fondés en Europe avant 1800. [less ▲]

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

Poster (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 detailIonospheric variability which degrades the precision of real time GNSS applications
Wautelet, Gilles ULg; Lejeune, Sandrine; Warnant, René ULg

Poster (2008, November 18)

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See detailHypertension artérielle et sport
Krzesinski, Jean-Marie ULg

Conference (2008, November 18)

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See detailModelling soil heterotrophic respiration in an agricultural soil: Model structure and first comparison with experimental data.
Buysse, Pauline ULg; Le Dantec, Valérie; Sagnier, Charlotte et al

Poster (2008, November 17)

Ce travail visait à adapter un modèle de respiration hétérotrophe du sol à un site agricole situé en Hesbaye (Belgique) et cultivé avec une rotation betterave sucrière / blé d’hiver / pomme de terre / blé ... [more ▼]

Ce travail visait à adapter un modèle de respiration hétérotrophe du sol à un site agricole situé en Hesbaye (Belgique) et cultivé avec une rotation betterave sucrière / blé d’hiver / pomme de terre / blé d’hiver. A long terme, ce modèle fera partie intégrante d’un modèle plus important qui décrira la respiration totale du sol et l’évolution du contenu en carbone du sol dans les cultures. Le modèle utilisé dans ce travail est dérivé du modèle Century, possède un pas de temps journalier et couvre une échelle spatiale de l’ordre de l’écosystème. La paramétrisation du modèle a été réalisée sur base d’une recherche bibliographique et de données collectées sur le site Carbo-Europe de Lonzée. Les caractéristiques du sol sont issues d’analyses réalisées sur des sols limoneux, typiques de la région de Hesbaye. Les variables conductrices (variables météorologiques et apports de litière) furent obtenues suite à une campagne de mesures de 4 ans réalisée sur le site expérimental de Lonzée. Les paramètres biochimiques du blé, de la pomme de terre et de la betterave furent tirés de la littérature. Une analyse de sensibilité fut réalisée en vue de classer les différents paramètres par rapport à leur impact sur le taux de respiration et les contenus en carbone de chaque pool. Les paramètres les plus importants étaient ceux contrôlant la réponse à la température, l’apport de litière et les teneurs en lignine et en azote. Des différences d’impact à court et long terme ont aussi été mises en évidence, notamment à cause de la dynamique de stabilisation des pools et des types de résidus de culture. Finalement, cette analyse nous a permis de définir de futures expériences qui seraient nécessaires pour améliorer l’ajustement du modèle sur des données expérimentales. [less ▲]

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See detailDirect block of SK2 and SK3 current by the sigma agonist 1,3-di-(2-tolyl)guanidine
Lamy, Cédric; Moreau, Jacqueline ULg; Dilly, Sébastien ULg et al

Poster (2008, November 17)

Sigma receptors are widely distributed in the central nervous system where they modulate neurotransmitter release, receptor function, ionic channel activity and calcium homeostasis. Two subtypes of sigma ... [more ▼]

Sigma receptors are widely distributed in the central nervous system where they modulate neurotransmitter release, receptor function, ionic channel activity and calcium homeostasis. Two subtypes of sigma receptors have been identified (sigma-1 and sigma-2) with different pharmacological profiles, anatomical distribution and physiological functions. 1,3-Di-(2-tolyl)guanidine (DTG) is a sigma-1 and sigma-2 agonist which is widely used to probe the function of these receptors. It has recently been shown that sigma-1 receptor activation reduces the opening of SK channels in the hippocampus. We have observed that DTG (100 µM) reduces the apamin-sensitive afterhyperpolarization (AHP) of dopaminergic neurons within a slice preparation by ~60%, an effect not observed with other sigma agonists. In addition, neither the selective sigma-1 antagonist BD 1047 (30 µM) nor haloperidol (1 µM) blocked the effect of DTG, which suggested that the inhibition of the AHP might result from a direct block of the underlying SK channels. Whole-cell recordings were made from HEK293 cells transiently transfected with rSK2 or hSK3 cDNA in symmetrical K+ conditions with currents activated by a [Cai] of 1 µM. Expressed SK2 and SK3 channels displayed a classical pharmacology, being blocked by apamin with mean IC50’s of 100 pM and 4 nM, respectively. In contrast, both channel subtypes were blocked with equal sensitivity by N-methyl-laudanosine (NML). DTG inhibited both SK2 and SK3 currents with the same potency (IC50’s were ~30 µM). A mutation that rendered both SK2 and SK3 insensitive to apamin and NML produced a current that was still sensitive to DTG. This direct block of SK channels may be important to consider in relation to the pharmacological effects of this compound. [less ▲]

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

Conference (2008, November 14)

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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 detailO-ARM Symposium
Martin, Didier ULg

Conference (2008, November 14)

Detailed reference viewed: 31 (2 ULg)
See detailJules Claskin: l'homme
Baiwir, Esther ULg

Conference (2008, November 13)

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See detailLes instruments de la fiscalité environnementale
Bourgeois, Marc ULg

Conference (2008, November 13)

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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 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)

Detailed reference viewed: 13 (2 ULg)
Peer Reviewed
See detailCognitive and affective mechanisms involved in hallucination-proneness
Laroi, Frank ULg

Conference (2008, November 08)

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See detailPharmacology of tiludronate in horses
Delguste, Catherine ULg

Conference (2008, November 08)

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See detailWortlaut et remplissement
Gyemant, Maria ULg

in Marthelot, Perrine (Ed.) S’orienter dans le langage : l’indexicalité (2008, November 08)

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See detailFollow-up on EUCAST
MELIN, Pierrette ULg

Conference (2008, November 06)

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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 detailApports de la télédétection dans l’étude diachronique de l’envasement de barrages : le cas des retenues Mohamed V et Hassan II (bassin de la Moulouya, Maroc oriental)
Nahon, Carole; Salmon, Marc ULg; Boumeaza, Taieb et al

in Randriamanga, Simone; Rakotoniaina, Solofoarisoa; Auda, Yves (Eds.) et al Les XIèmes Journées Scientifiques du Réseau Télédétection de l'AUF (2008, November 06)

Situé au nord-est du Maroc, le bassin de la Moulouya (53 500 km²) se caractérise par un climat semi-aride à aride, par un couvert végétal très faible et par une lithologie souvent fort favorable à ... [more ▼]

Situé au nord-est du Maroc, le bassin de la Moulouya (53 500 km²) se caractérise par un climat semi-aride à aride, par un couvert végétal très faible et par une lithologie souvent fort favorable à l’érosion ou à l’écoulement en nappe. Lors des crues, presque toujours violentes, tous ces facteurs engendrent un charriage particulièrement important de sédiments. Ceux-ci finissent par se déposer en delta à l’entrée des lacs de barrage qui, de ce fait, s’envasent progressivement. Les barrages Mohamed V (1967) et Hassan II (2000) sont situés respectivement sur l’oued Moulouya et sur son principal affluent, l’oued Za. Le premier est déjà envasé pour plus de la moitié, et le second, construit en amont notamment pour limiter le comblement de son aîné, présente déjà les premiers signes d’un envasement précoce. Ce remplissage progressif par les sédiments réduit les disponibilités en eau de la région. Après une bonne compréhension du problème, il est intéressant de compléter l’étude par une analyse de l’évolution de l’envasement à l’aide d’images satellitaires. Grâce à la télédétection, complémentaire aux approches bibliographiques et de terrain, nous avons pu analyser et cartographier ces phénomènes. [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 detailAnalyse diachronique d’une région côtière : la Mer des Wadden de la Frise du Nord (Allemagne)
Silinski, Alexandra; Salmon, Marc ULg; Ozer, André ULg

in Randriamanga, Simone; Rakotoniaina, Solofoarisoa; Auda, Yves (Eds.) et al Les XIèmes Journées Scientifiques du Réseau Télédétection de l'AUF (2008, November 06)

Le but de cette étude est d’analyser l’évolution récente de la région côtière de la Frise du Nord sur la côte occidentale du Schleswig-Holstein, le Land le plus septentrional de l’Allemagne. A notre ... [more ▼]

Le but de cette étude est d’analyser l’évolution récente de la région côtière de la Frise du Nord sur la côte occidentale du Schleswig-Holstein, le Land le plus septentrional de l’Allemagne. A notre disposition, nous avions des séries de cartes topographiques et bathymétriques, de photos aériennes, ainsi que des images satellitaires SPOT obtenues dans le cadre du programme OASIS, qui ont rendu possible des approches variées, tant géomorphologiques que botaniques. [less ▲]

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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 detailPrédiction des zones propices au ravinement par un modèle de régression logistique intégrant des données de télédétection. Cas du sous-bassin versant de l’oued Alayem - Beni Slimane, Algérie
Daoudi, Mohamed; Ozer, André ULg; Gérard, Paul ULg et al

in Randriamanga, Simone; Rakotoniaina, Solofoarisoa; Auda, Yves (Eds.) et al Les XIèmes Journées Scientifiques du Réseau Télédétection de l'AUF (2008, November 03)

Le sous-bassin versant de l'oued Alayem - Beni Slimane, d’une superficie de 118 km², constitue une zone d'étude d'intérêt particulier en raison des caractéristiques physicoclimatiques représentatives de ... [more ▼]

Le sous-bassin versant de l'oued Alayem - Beni Slimane, d’une superficie de 118 km², constitue une zone d'étude d'intérêt particulier en raison des caractéristiques physicoclimatiques représentatives de la zone tellienne méditerranéenne. Le processus de ravinement y est très répandu et constitue un problème majeur. Les facteurs physiques et anthropiques contribuent à une accélération du phénomène. Le présent travail propose une méthode multivariée, basée sur des données multisources, afin de déterminer les variables indépendantes significatives qui favorisent l’existence de l’érosion ravinante et calculer la probabilité des zones de susceptibilité au processus de ravinement. Des variables explicatives toutes liés aux caractéristiques physico-climatiques sont retenues pour le modèle : il s’agit de la lithologie, la pente, l’orientation des versants, l’altitude (MNT), la morphopédologie, la couverture du sol (PVI) et l’agressivité des précipitations (Indice R). Elles permettent de généraliser le modèle prédictif pour des régions semblables du nord de l’Algérie ou du Maghreb. [less ▲]

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See detailFunction and application of plant volatiles in ecological regulation and management of pest.
Zhou, Haibo ULg

(2008, November 02)

Study on the ecological regulation of pests was one of the hotspot in the researches of sustainable agriculture in recent years,and the plant volatiles have been shown to exert important influence on ... [more ▼]

Study on the ecological regulation of pests was one of the hotspot in the researches of sustainable agriculture in recent years,and the plant volatiles have been shown to exert important influence on behaviors of pests. This paper reviewed the effect and mechanism of plant volatiles to pests in host selection, attraction,antifeeding, repellence, growth inhibition, the prospect and application of plant volatiles to agricultural cultivation was further discussed. [less ▲]

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

Conference (2008, November 02)

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See detailThe Gaia satellite: a tool for Emission Line Stars and Hot Stars
Martayan, C.; Frémat, Y.; Blomme, R. et al

in SF2A-2008 (2008, November 01)

The Gaia satellite will be launched at the end of 2011. It will observe at least 1 billion stars, and among them several million emission line stars and hot stars. Gaia will provide parallaxes for each ... [more ▼]

The Gaia satellite will be launched at the end of 2011. It will observe at least 1 billion stars, and among them several million emission line stars and hot stars. Gaia will provide parallaxes for each star and spectra for stars till V magnitude equal to 17. After a general description of Gaia, we present the codes and methods, which are currently developed by our team. They will provide automatically the astrophysical parameters and spectral classification for the hot and emission line stars in the Milky Way and other close local group galaxies such as the Magellanic Clouds. [less ▲]

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See detailRadial velocities with the Gaia RVS spectrometer
Viala, Y. P.; Blomme, R.; Damerdji, Yassine ULg et al

in Charbonnel, C.; Combes, F.; Samadi, R. (Eds.) SF2A-2008; Annual Meeting of the French Society of Astronomy (2008, November 01)

Four different method are used to derive radial velocities from spectra observed by the Gaia Radial Velocity Spectrometer (RVS). They are briefly presented here together with very preliminary results.

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See detailDIGIT, GASPS, DEBRIS and DUNES: four HERSCHEL Open Time Key Programs to survey the dust cycle in circumstellar disks
Augereau, J.-C.; Absil, Olivier ULg; Bouvier, J. et al

in Charbonnel, C.; Combes, F.; Samadi, R. (Eds.) SF2A-2008 (2008, November 01)

Four accepted HERSCHEL open time key programs, DIGIT, GASPS, DEBRIS and DUNES, will study the evolution of the dust grains in circumstellar disks around young and Main Sequence stars. There is a strong ... [more ▼]

Four accepted HERSCHEL open time key programs, DIGIT, GASPS, DEBRIS and DUNES, will study the evolution of the dust grains in circumstellar disks around young and Main Sequence stars. There is a strong implication of the french community in these four projects which represent a total of 930 hours (>38 days) of her\ observing time. The DIGIT and GASPS projects will focus on the first stages of planet formation, while the DEBRIS and DUNES projects will search for extra-solar Kuiper Belt analogs around nearby Main Sequence stars. In this paper, we give an overview of the scientific goals of the four projects and of the numerical tools that we will be providing to the teams to model and interpret the her\ observations from these programs. [less ▲]

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See detailStability analysis of an evaporating binary mixture
Machrafi, Hatim ULg; Rednikov, Alexey; Colinet, Pierre et al

in Bulletin of the American Physical Society, Vol. 53, n°15 (2008, November 01)

Rayleigh-Bénard-Marangoni instabilities in an evaporating binary mixture, consisting of a solvent and a solute of weak concentration, are studied theoretically. Local thermodynamic equilibrium is assumed ... [more ▼]

Rayleigh-Bénard-Marangoni instabilities in an evaporating binary mixture, consisting of a solvent and a solute of weak concentration, are studied theoretically. Local thermodynamic equilibrium is assumed at the flat gas-liquid interface. Solvent evaporation and air absorption in the liquid are neglected. At a certain height above the interface, the temperature and the concentration are fixed. One of the goals of the study is to track down the effects of this artifact on the results. Non-linear quasi-stationary basic profiles (due to evaporation) of the temperature and the solute concentration in the gas phase are considered, while the temperature distribution in the liquid is assumed to be linear and quasi-stationary. For the solute concentration in the liquid phase, two variants of the reference solution are studied, one just linear and quasi-stationary, whereas the other involves a fully transient non-linear profile. The latter is a more realistic option, given the relatively slow diffusion time in the liquid. A linear stability analysis is then carried out numerically, and illustrated for an aqueous solution of ethyl alcohol. [less ▲]

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See detailComparison of Ultra capacitors and Batteries Technologies to Optimize Hybrid Electric Vehicle Efficiency
Nzisabira, Jonathan; Louvigny, Yannick ULg; Duysinx, Pierre ULg

in Proceeding of 3rd European Symposium on Supercapacitors and Application (ESSCAP08) (2008, November)

The acceptance of Electric and Hybrid Electric Vehicle is related to their eco-efficiency, i.e. their ability to both reduce environmental impact while also providing a sufficient user satisfaction. The ... [more ▼]

The acceptance of Electric and Hybrid Electric Vehicle is related to their eco-efficiency, i.e. their ability to both reduce environmental impact while also providing a sufficient user satisfaction. The objective of this study is to provide a rationale design tool based on a multidisciplinary optimization approach to support the design of hybrid electric powertrain to simultaneously maximize user satisfaction complex criteria and minimize the Eco-score. In order to carry out the optimization problem efficiently the approach makes use of metamodeling techniques in order to save computation time in the optimization process that is driven by a Genetic Algorithm. The approach is applied to highlight the effect of different energy storage systems (batteries v.s. ultra capacitors) upon the optimized HEV design taking care of both Eco-score and User satisfaction. In the selected application that is a heavy urban bus with a mild hydrid electric powertrain, the ultra capacitors are slightly superior to NiMH batteries when emphasizing the Ecoscore criterion. [less ▲]

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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 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 detailEtude analytique des trois trousses de cystatine C et impact sur les formules basées sur la cystatine pour l'estimation du DFG.
Cavalier, Etienne ULg; Péroni, Laurence; Abshoff, Christelle et al

in Néphrologie & Thérapeutique (2008, November), 4(6), 399-400

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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)

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See detailConvective drying of gels: comparison between simulated and experimental moisture profiles obtained by X-ray microtomography
Escalona, Ivonne; Jomaa, Wahbi; Olivera-Fuentes, Claudio et al

in Thorat, B. N. (Ed.) Drying 2008 - Proceedings of the 16th International Drying Symposium (IDS2008), Vol. C. (2008, November)

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See detailDu contenu du sens au sens du contenu chez Heidegger et Wittgenstein
Gauvry, Charlotte ULg

Conference (2008, November)

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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 detailRaymond Lemaire and Piero Gazzola: a close collaboration
Houbart, Claudine ULg

in Di Lieto, Alba; Morgante, Michela (Eds.) Piero Gazzola: una strategia per i beni architettonici nel secondo Novecento (2008, November)

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See detailConsumo de licor de absenta en la población mayor de 50 años
Bejarano, Maria; Cascales - Miñana, Borja ULg; Zamora, Maria J. et al

Conference (2008, November)

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See detailWhy Leap Over? Redefining the Banks of the Uncanny Valley
Collignon, Stéphane ULg

in Capey, M.; Ip, B.; Blastland, Felicity (Eds.) Inaugural SAND Academic Peer reviewed Papers (2008, November)

proposition de révision du graphique de la Uncanny Valley en fonction des caractéristiques de la caricatures d'une point de vue cognitif et éthologique.

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See detailConfidentiality and Third Parties in International Commercial Arbitration : Some Preliminary Reflections
Wautelet, Patrick ULg

in Caprasse, Olivier (Ed.) L'arbitrage et les tiers (2008, November)

This paper seeks to review first if there exists a duty of confidentiality in international commercial arbitation and, if yes, what it its scope, nature and limitations. Drawing from this first analysis ... [more ▼]

This paper seeks to review first if there exists a duty of confidentiality in international commercial arbitation and, if yes, what it its scope, nature and limitations. Drawing from this first analysis, this paper also reviews the strenght of the confidentiality argument in relationship with third parties. To that end, the paper examines various scenarios in which third parties may be faced with arbitration proceedings. In order to resolve the difficulties caused by a possible confidentiality duty resting upon the parties, the arbitrators or other parties, the paper reviews various solutions, drawing upon contract law and private international law. [less ▲]

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See detailLes restaurations all ceram
VAN HEUSDEN, Alain ULg; MAINJOT, Amélie 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

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See detailRobust Portfolio Selection
Schyns, Michael ULg

in JSM Proceedings, Statistical Computing Section (2008, November)

In many financial problems, small variations in some inputs may result in big changes in the outputs. In this talk, we consider the problem of portfolio selection as suggested by Markowitz. This model ... [more ▼]

In many financial problems, small variations in some inputs may result in big changes in the outputs. In this talk, we consider the problem of portfolio selection as suggested by Markowitz. This model relies on a covariance matrix usually estimated using historical returns of the assets under consideration. Gross error in these returns or atypical events occurring in the past could lead to different portfolios with quite different expected returns. Defining methods that do not depend too much on these atypical data is the aim of robust statistics. We will show that some techniques developed in that field are worth applying in our context. More precisely, the covariance matrix of historical data will be estimated with the Minimum Covariance Determinant estimator, computed with a 'smooth' algorithm. This robust Markowitz methodology will be illustrated on real financial data. [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 detailThe amazing bouncing droplet
Terwagne, Denis ULg; Dorbolo, Stéphane ULg; Vandewalle, Nicolas ULg et al

Poster (2008, November)

When a low viscosity oil droplet is laid onto the surface of a high viscosity oil liquid, it stays at rest for a moment before coalescence. The coalescence can be delayed and sometimes inhibited by ... [more ▼]

When a low viscosity oil droplet is laid onto the surface of a high viscosity oil liquid, it stays at rest for a moment before coalescence. The coalescence can be delayed and sometimes inhibited by injecting fresh air under the droplet. This can happen when the surface of the bath oscillates vertically. In this case the droplet basically bounces on the interface [1, 2]. We observe that the conditions for bouncing depends on the frequency, more precisely we observe resonance when the eigenfrequency of the droplet is excited. Lord Rayleigh expressed the droplet deformation modes in terms of spherical harmonics Y m. We present different l experimental mode of deformation with the corresponding spherical harmonic model. In some conditions, a droplet presents a non axi-symmetric mode of deformation. That leads to a rotation of the droplet and to a horizontal displacement. [less ▲]

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See detailLumière sur la prescription d'antibiotiques en médecine dentaire
MAINJOT, Amélie ULg

Conference (2008, November)

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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 detailPESTEAUX : A project for building GIS-based tool for the assessment of water pollution risks at local scale due to pesticides
Bah, Boubacar Billo ULg; Noël, Stéphanie; Buffet, Dominique et al

Poster (2008, November)

Detailed reference viewed: 27 (2 ULg)