References of "Scientific congresses and symposiums"
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See detailMallarmé dans la prison des signes
Durand, Pascal ULg

in Cahiers du CérédI (2014, June), 10

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See detailLe B.I.M et la maquette virtuelle comme moyen pédagogique permettant le rapprochement entre les cours d'informatique et l'enseignement du projet d'architecture
Boutemadja, Abdelkader ULg; Driesmans, Carine ULg; Jancart, Sylvie ULg

in Kubicki, Sylvain; Halin, Gilles; Bignon, Jean-Claude (Eds.) Scan 14 sémainaire de conception architecturale numérique : Interaction(s) des maquettes numériques (2014, June)

In the context of this paper, we pose the question of the conditions of possible link between computer courses and design projet. The integration of schools of architecture at universities is an ... [more ▼]

In the context of this paper, we pose the question of the conditions of possible link between computer courses and design projet. The integration of schools of architecture at universities is an opportunity to focus in the experiments made in this direction and to propose to implement the terms of this rapprochement. For us, it is important that this approach lies in the Bachelor years in a common core for all students. [less ▲]

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See detailURINARY AND SALIVARY CORTISOL IN LIQUID CHROMATOGRAPHY–TANDEM MASS SPECTROMETRY: METHOD VALIDATION AND EXPECTED VALUES DETERMINATION
LE GOFF, Caroline ULg; DELCOUR, Sandra ULg; PEETERS, Stéphanie ULg et al

in Clinical Chemistry & Laboratory Medicine (2014, June), 52(Special Suppl), 1241

BACKGROUND: Cortisol measurement is useful in evaluation of Cushing syndrome, adrenal insufficiency, mineralocorticoid excess and congenital adrenal hyperplasia. We developed a liquid ... [more ▼]

BACKGROUND: Cortisol measurement is useful in evaluation of Cushing syndrome, adrenal insufficiency, mineralocorticoid excess and congenital adrenal hyperplasia. We developed a liquid chromatography–tandem mass spectrometry (LCMS/MS) method for salivary and urinary cortisol and we determined the 95th percentile (p95) for the urinary and salivary cortisol. We compared them to the Mayo Clinic expected values. METHODS: Saliva at 8 am and 11 pm and 24h urine were obtained from 32 healthy (22 female, 34.3±9.3 yo) volunteers. We performed validation with the enoval software (Arlenda, Belgium). For the validation, we used water or urine with spiked known amounts of cortisol for the CORS and CTU respectively. For the CORS, samples were centrifuged, deuterium labelled cortisol was added as internal standard and the protein precipated by acetonitril. The supernatant was evaporated, dissolved in methanol acidified with acetic acid and analyzed by LCMS/MS. For CTU, samples were centrifuged, deuterium labelled cortisol was added as internal standard and diluted by the ammonium acetate and analyzed by LCMS/MS. At the Mayo Clinic, the expected values were 1-7.5 μg/L (7 a.m-9 a.m) and <1 μg/L (11-12 p.m) for CORS and 3.5-45 μg/24h (<18yo) for CTU. RESULTS: For the CTU, the with-in run did not exceed 3% (0.4-3%) and the between-run did not exceed 3.1% (0.4-3.1%) for 1.5-750 μg/L. The limit of quantification was 1.5 μg/L. The linearity was good between 1.5 and 750 μg/L. The recovery is 97.9±2.2% (95%CI for the mean: 92.4-101.1%). For the CORS, the with-in run and between run did not exceed 8% (1.9-8%) for 1.15-8.65 μg/L. The limit of quantification was 1.15 μg/L. The analyse presents a good linearity between 1.15 and 8.65 μg/L. The recovery is 99.9±2.9% (95%CI for the mean: 94.2-108.7%). The p95 for the CTU according to the CLSI C28-A3 was 33 μg/24h, and for the CORS was 5.42 μg/L at 8 am and 0.7 μg/L at 12 pm. CONCLUSIONS: Our developed method in liquid chromatography tandem mass spectrometry was validated for the measurement of urinary and salivary cortisol. Our findings indicate that the proposed analytical methods were suitable for routine purposes and useful in many pathological conditions.The expected values confirm these defined by the Mayo Clinic. [less ▲]

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See detailSimple connectome inference from partial correlation statistics in calcium imaging
Sutera, Antonio ULg; Joly, Arnaud ULg; François-Lavet, Vincent ULg et al

in Proceedings of Connectomics 2014 (ECML 2014) (2014, June)

In this work, we propose a simple yet effective solution to the problem of connectome inference in calcium imaging data. The proposed algorithm consists of two steps. First, processing the raw signals to ... [more ▼]

In this work, we propose a simple yet effective solution to the problem of connectome inference in calcium imaging data. The proposed algorithm consists of two steps. First, processing the raw signals to detect neural peak activities. Second, inferring the degree of association between neurons from partial correlation statistics. This paper summarises the methodology that led us to win the Connectomics Challenge, proposes a simplified version of our method, and finally compares our results with respect to other inference methods. [less ▲]

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See detailRole of estradiol in the feminization of lordosis behavior in female mice
Trouillet, Anne-Charlotte ULg

Poster (2014, June)

The classic theory of mammalian brain and behavioral sexual differentiation holds that an organizational action of testosterone, secreted perinatally by the male’s testes, controls male-typical aspects of ... [more ▼]

The classic theory of mammalian brain and behavioral sexual differentiation holds that an organizational action of testosterone, secreted perinatally by the male’s testes, controls male-typical aspects of brain and behavioral development, whereas no active perinatal sex hormone signaling is required for female-typical differentiation. However, it has recently been shown using aromatase knock out (ArKO) mice, which are deprived of estradiol due to a targeted mutation in the aromatase gene, that estradiol may also actively contribute to the differentiation of female-typical aspects of behavior over a specific pre-pubertal period. Female ArKO mice showed significantly lower levels of lordosis behavior than wild type controls following adult ovariectomy and treatment with ovarian hormones. This deficit was restored by treating female ArKO mice with estradiol benzoate between postnatal days 15 and 25. However, the mechanism by which estradiol acts prepubertally in female mice to feminize lordosis behavior remains to be elucidated. Therefore, in a first attempt, we are determining which neuropeptides are in particularly sensitive to estradiol action over the prepubertal period. We will focus on neuropeptides which have been shown to be implicated in lordosis behavior. Studies by the group of Micevych have proposed an important role for NPY and beta-endorphin (B-END) neurons in the arcuate nucleus (ARC) in the estradiol-mediated activation of lordosis behavior in female rats. An in vitro study recently showed that kisspeptin directly activates ARC B-END neurons. This is particularly interesting since unpublished results from our laboratory showed that Kp neurons are directly involved in the expression of lordosis behavior. We are thus currently determining the expression of NPY, B-END, and kisspeptin in the ARC as well as μ-opioid receptors MORs in the MPN over the prepubertal period and their possible modulation by prepubertal estradiol treatment. [less ▲]

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See detailSUITABILITY OF 24,25(OH)2 VITAMIN D3 DETERMINATION WITH AN ADAPTED VERSION OF THE CHROMSYSTEMS® MASSCHROM® 25-OH-VITAMIN D3/D2– LC-MS/MS KIT
SCHLECK, Marie-Louise ULg; NETCHACOVITCH, Matthieu ULg; CRINE, Yannick ULg et al

in Clinical Chemistry & Laboratory Medicine (2014, June), 52(Special Suppl), 1235

BACKGROUND: The enzym CYP24A1 catalyses the conversion of 25(OH)D3 in 24,25(OH)2D3. Recently, loss-of-function mutation of CYP24A1 has been identified in idiopathic infantile hypercalcemia (IIH). This ... [more ▼]

BACKGROUND: The enzym CYP24A1 catalyses the conversion of 25(OH)D3 in 24,25(OH)2D3. Recently, loss-of-function mutation of CYP24A1 has been identified in idiopathic infantile hypercalcemia (IIH). This genetic defect can be highlighted by high 1,25(OH)2D3 and undetectable 24,25(OH)2D3 levels. 24,25(OH)2D3 is also known to interfere with 25(OH)D3 determinations with immunoassays, leading to an overestimation of the 25(OH)D3 concentrations. We adapted the MassChrom kit on the AB SCIEX TQ 5500 in order to systematically provide, next to 25(OH)D3, 25(OH)D2 and C3 epimer, the concentrations of 24,25(OH)2D3. The aim of this study was to evaluate the performance of 24,25(OH)2D3 determination with this modified method. We also wanted to establish the reference value of 24,25(OH)2D3. METHODS: We modified the Chromsystems MassChrom method by adding the 24,25(OH)D3 correspondent transitions and performed a calibration by spiking known amounts of 24.25(OH)2D3. The LOQ was determined with 10 concentration levels of 24,25(OH)2D3. We selected 92 healthy children (40 girls; 2.4±1.51 years) presenting normal calcium levels (2.49±0.13mmol/l) to determine the 95th percentile (p95). RESULTS: The 24,25(OH)2D3 LOQ was 4.7 ng/ml. 85.9% of our subjects were below this LOQ. The p 95 for the 24,25(OH)2D3, according to the CLSI C28-A3, was <6.2 ng/ml. The average serum concentrations (mean±SD) of 25(OH)D3 and 3-epi-25(OH)D3 were 24.48±10.22ng/ml and 2.07±1.86 ng/ml respectively. The 24,25(OH)2D3 levels (r2=0.64) correlated with the 25(OH)D3 levels. CONCLUSIONS: Our adapted method from Chromsystems Vitamin D determination is available to quantify 24,25(OH)2D3. In this context, this method is able to determine high levels of 24,25(OH)2D3 that can possibly cross react with immunoassays. However, as the LOQ was not low enough, we couldn’t establish correct reference value for 24,25(OH)2D3. A derivatization step in the sample preparation would be interesting to improve the sensibility of the method. [less ▲]

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See detailBelowground Chemical Ecology: The Case of Wireworms
Barsics, Fanny ULg; Delory, Benjamin ULg; Delaplace, Pierre ULg et al

Poster (2014, June)

Wireworms, clock-beetles' larvae (Coleoptera, Elateridae), are below ground pests of many crops. They cause dramatic yield losses worldwide. Research on their ecology is crucial to undertake innovative ... [more ▼]

Wireworms, clock-beetles' larvae (Coleoptera, Elateridae), are below ground pests of many crops. They cause dramatic yield losses worldwide. Research on their ecology is crucial to undertake innovative management strategies. In the field of chemical ecology, multitrophic interactions occurring in the rhizosphere are gaining increasing attention from entomologists and agronomists. Our research aims at unveiling the role of volatile organic compounds (VOC) involved in wireworms' foraging behavior, putatively leading to host localization and/or host recognition. [less ▲]

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See detailSTUDIO in vitro DEI PARAMETRI DI COINFEZIONE E SUPERINFEZIONE CHE INFLUENZANO LA RICOMBINAZIONE NEI NOROVIRUS
Di Felice, Elisabetta; Ceci, Chiara; Zonta, William ULg et al

Poster (2014, June)

I norovirus (NoV) sono piccoli virus (38-40 nm) a RNA monocatenario sprovvisti di envelope appartenenti alla famiglia Caliciviridae. I NoV attualmente vengono riconosciuti come una delle più importanti ... [more ▼]

I norovirus (NoV) sono piccoli virus (38-40 nm) a RNA monocatenario sprovvisti di envelope appartenenti alla famiglia Caliciviridae. I NoV attualmente vengono riconosciuti come una delle più importanti cause di gastroenterite acute di origine non batterica nell'uomo coinvolgendo tutte le classi di età e soprattutto contesti comunitari. I meccanismi molecolari che influenzano l'evoluzione dei NoV sono l'accumulo di mutazioni puntiformi e la ricombinazione. L’obiettivo sarà quello di dimostrare che la ricombinazione è un evento che può essere influenzabile dall’impiego di diversi parametri di coinfezione/superinfezione. In letteratura, gli studi sugli eventi ricombinanti che caratterizzano i NoV umani risultano piuttosto limitati a causa dell'assenza di un substrato cellulare che ne permetta la replicazione in vitro. Nel presente lavoro è stato sviluppato un modello sperimentale basato sull’impiego dell’unico NoV, il norovirus murino (MNV), in grado di replicare su substrato cellulare. A tal fine monostrati di cellule RAW264.7 sono stati coinfettati e superinfettati con due ceppi di MNV (CW1 e WU20) utilizzando diversi indici di molteplicità (MOI) e differenti tempi di infezione. I surnatanti sono stati collezionati a 24 e 48 ore post-infezione e quindi sottoposti a metodo delle placche. All’interno della popolazione virale risultante da tale coinfezione/superinfezione, 36 cloni per ciascuna condizione sono stati selezionati e purificati dalle placche e, successivamente, utilizzati per infettare nuovi monostrati cellulari di RAW264.7. Il monitoraggio degli eventi ricombinanti è stato eseguito mediante PCR e Real-Time PCR dopo estrazione dell'RNA virale e retrotrascrizione, impiegando due set di primer in grado di amplificare le regioni site all’estremità iniziale di ORF1 e all’estremità terminale di ORF3. I risultati che permetteranno di quantificare la distribuzione dei ceppi presenti nel surnatante della superinfezione, sono ancora in corso di analisi. [less ▲]

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See detailL’effet d’un dispositif public d’accompagnement et de formation belge sur les trajectoires professionnelles des demandeurs d’emploi
Gérard, Julie ULg

Conference (2014, June)

: Suite aux récents bouleversements économiques et sociaux touchant les pays de l’Union Européenne, de nombreux partenariats entre services publics d’emploi et agences d’emploi privées se sont développés ... [more ▼]

: Suite aux récents bouleversements économiques et sociaux touchant les pays de l’Union Européenne, de nombreux partenariats entre services publics d’emploi et agences d’emploi privées se sont développés et complexifiés, suivant une logique de gestion mixte du marché de l’emploi. Cette communication porte sur l’étude d’un partenariat public-privé entre un service public régional belge et un organisme de formation. À partir des apports conceptuels et théoriques de la sociologie de l’action publique et de la littérature propre aux agences d’emploi privées et aux partenariats public-privé, nous analyserons la capacité d’un dispositif public à assurer la remise à l’emploi de son public-cible. Pour ce faire, nous étudierons son rôle et ses effets sur les trajectoires professionnelles des demandeurs d’emploi y recourant. [less ▲]

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See detailFigures du critique-écrivain, formes et pratiques du discours métalittéraire: Introduction et conclusions
Stienon, Valérie ULg; Van Nuijs, Laurence

Conference (2014, June)

Du XIXe siècle à nos jours, de nombreux écrivains ont combiné écriture de création et critique littéraire. À ces pratiques mêlées correspondent des statuts hybrides, dont celui de « critique-écrivain » ... [more ▼]

Du XIXe siècle à nos jours, de nombreux écrivains ont combiné écriture de création et critique littéraire. À ces pratiques mêlées correspondent des statuts hybrides, dont celui de « critique-écrivain » est peut-être le plus représentatif. Ce colloque se propose d’interroger cette figure bifide, en prenant en considération les divers paramètres de la critique littéraire en tant que pratique protéiforme, depuis l’institutionnalisation de la critique au XIXe siècle (critique journalistique, critique des écrivains et critique universitaire) jusqu’à la diversification moderne des types de discours critique (théorique, historique, médiatique, essayiste, romanesque). Comment les rapports entre critique et création sont-ils imaginés, confirmés voire inversés par les écrivains ? Par rapport à quels modèles et repoussoirs les écrivains se définissent-ils en critiques ou en créateurs (ceux, par exemple, du théoricien, de l’essayiste, du chroniqueur, du sociologue ou encore du polémiste) ? Pourquoi la postérité a-t-elle retenu comme critiques des auteurs qui ont par ailleurs investi ou approché une production spécifiquement littéraire ? Et comment ces rapports se renégocient-ils tout au long de l’histoire de la critique ? [less ▲]

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See detailAnalyse du métier de facilitateur et de son rôle dans la diffusion de normes d’emploi : le cas d’un bureau de chômage belge
Orianne, Jean-François ULg; Beuker, Laura ULg

Conference (2014, June)

En 2004, suite aux injonctions européennes en matière d’activation impulsées par les lignes directrices de 2003-2005, la Belgique met en place le PAC (ou Plan d’Accompagnement des chômeurs). Cette ... [more ▼]

En 2004, suite aux injonctions européennes en matière d’activation impulsées par les lignes directrices de 2003-2005, la Belgique met en place le PAC (ou Plan d’Accompagnement des chômeurs). Cette importante réforme prévoit – notamment – la mise en place de la procédure d’activation du comportement de recherche d’emploi par l’Office National de l’Emploi (Ou l’ONEm). Désormais, des agents sont spécifiquement dédiés à l’évaluation des efforts menés par les demandeurs d’emploi (ou DE) pour s’insérer sur le marché du travail : ce sont les facilitateurs. Si la procédure d’évaluation est officiellement définie, la décision, quant à elle, est bel et bien fonction de l’agent, qui doit interpréter le cadre réglementaire général à l’aune de la situation singulière du demandeur d’emploi. À l’aide d’une étude de cas réalisée au sein d’un bureau de chômage situé en Belgique francophone, nous allons tenter d’ouvrir la « boîte noire » du jugement des facilitateurs. À partir d’une approche qualitative cumulant des entretiens semi-directifs et de l’observation d’interactions entre facilitateurs et demandeurs d’emploi, nous montrerons que la décision des facilitateurs n’est ni arbitraire, ni déterminée. Elle est, au contraire, le fruit de la mobilisation d’une multitude d’appuis conventionnels dans l’action (Dodier, 1993). En outre, dans la lignée des travaux de Benarrosh (2000 ; 2006 ; 2012) nous démontrerons que ces agents sont des « pourvoyeurs » de normes institutionnelles précises à destination des demandeurs d’emploi. [less ▲]

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See detailApplication of hyperspectral Raman imaging to the analysis of a self-emulsifying drug delivery system (SEDDS).
Sacre, Pierre-Yves ULg; De Bleye, Charlotte ULg; Netchacovitch, Lauranne ULg et al

Poster (2014, June)

Self-emulsifying drug delivery systems (SEDDS) are mixtures of drug and excipients that undergo emulsification when exposed to water. This pharmaceutical form is used to enhance the oral absorption of ... [more ▼]

Self-emulsifying drug delivery systems (SEDDS) are mixtures of drug and excipients that undergo emulsification when exposed to water. This pharmaceutical form is used to enhance the oral absorption of poorly water-soluble drugs. The API is finely dispersed in the excipients and forms a solid solution increasing its dissolution rate. Hyperspectral Raman imaging is a powerful tool that combines both spectral and spatial information. It returns qualitative and quantitative information useful during the development or the characterization of pharmaceutical preparations. The studied formulation consisted of a BCS 2 API (high permeability, low solubility) dispersed in excipients mainly composed of Lauroyl macrogol-32 glycerides (>50%). Two different preparations were analyzed: 100% of API dissolved and 70% of API dissolved with 30% of API powder added to the formulation. The two formulations have therefore exactly the same qualitative and quantitative composition but different spatial distribution and dispersion of the API mimicking a problem during the process. First a confocal Raman microscopic analysis was performed to evaluate the solid state of the API in the formulations. Then, an evaluation of the particle size was performed. These results are important since they can affect the bioavailability of the API and therefore its activity. Beside the microscopic scale analysis, a macroscopic imaging quantitative PLS model has been developed. The method has been validated within +/- 10% acceptance limits following the total error approach. This validated quantitative model enables reliable quantitative analysis at the pixel level of Raman images providing meaningful chemical images. [less ▲]

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See detailPrediction of macroscopic mechanical properties of a polycrystalline microbeam subjected to material uncertainties
Lucas, Vincent ULg; Wu, Ling ULg; Arnst, Maarten ULg et al

in Cunha, Álvaro; Caetano, Elsa; Ribeiro, Pedro (Eds.) et al Proceedings of the 9th International Conference on Structural Dynamics, EURODYN 2014 (2014, June)

The first resonance frequency is a key performance characteristic of MEMS vibrometers. In batch fabrication, this first resonance frequency can exhibit scatter owing to various sources of manufacturing ... [more ▼]

The first resonance frequency is a key performance characteristic of MEMS vibrometers. In batch fabrication, this first resonance frequency can exhibit scatter owing to various sources of manufacturing variability involved in the fabrication process. The aim of this work is to develop a stochastic multiscale model for predicting the first resonance frequency of MEMS microbeams constituted of polycrystals while accounting for the uncertainties in the microstructure due to the grain orientations. At the finest scale, we model the microstructure of polycrystaline materials using a random Voronoï tessellation, each grain being assigned a random orientation. Then, we apply a computational homogenization procedure on statistical volume elements to obtain a stochastic characterization of the elasticity tensor at the second scale of interest, the meso-scale. In the future, using a stochastic finite element method, we will propagate these meso-scale uncertainties to the first resonance frequency at the coarser scale. [less ▲]

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See detailExecutive function and grey matter atrophy in healthy aging: A voxel-based morphometry analysis
Manard, Marine ULg; Bahri, Mohamed Ali ULg; Salmon, Eric ULg et al

Poster (2014, June)

Introduction Executive functioning is one of the cognitive domain that declines in healthy aging (Salthouse, Atkinson, & Berish, 2003). In addition, neuroimaging studies pointed out diverse ... [more ▼]

Introduction Executive functioning is one of the cognitive domain that declines in healthy aging (Salthouse, Atkinson, & Berish, 2003). In addition, neuroimaging studies pointed out diverse neurobiological modifications associated to normal aging, such as reduced grey and white matter volumes and cortical thickness (Raz & Rodrigue; 2006). In that context, Voxel Based Morphometry (VBM; Ashburner & Friston, 2000) and Partial Least Square (PLS; McIntoch at al., 1996, 2004) were used to investigate the effect of grey matter atrophy on executive abilities in normal aging. Methods Thirty six young (age range: 18-30) and 43 healthy older (age range: 60-78) adults were included in this study. Executive functioning was assessed by inhibition, updating and shifting tasks (Miyake et al., 2000), and a composite score for general executive ability was created. Structural high resolution T1-weighted images were acquired with a 3T head-only scanner using a standard transmit-receive quadrature head coil (Siemens, Allegra, Erlangen, Germany). The structural images were segmented using VBM8 toolbox, normalized to the MNI stereotaxic space and the resulting grey matter volume images were smoothed (Gaussian kernel: FWHM 8mm). PLS analyses were performed to determine regional grey matter volume differences between young and older adults, and next to identify the regional grey matter volumes specifically associated to executive performance in older participants (p<0.001). PLS is a validated multivariate approach that robustly identifies whole brain activity patterns correlated with behavioral data or experimental design (i.e., scores, conditions or tasks). Results Behavioral data showed a significant age-related decline in executive functioning (t=-5.43; p<.001). MRI analyses showed that significant age-related grey matter volume decrease was mostly observed across a large network including frontal, parietal, and temporal regions. Moreover significant positive correlations between the executive score and the grey matter volumes in older participants were found in a subset of these cortical areas: the inferior, middle and superior frontal cortex, the pre and postcentral gyri, the anterior and middle cingulate cortex, the inferior and superior parietal regions, the retrosplenial cortex, and finally, the inferior, middle and superior temporal regions. Discussion This study first replicated that executive abilities decline with age (Salthouse et al., 2003). This age-related executive decline is related to specific cerebral regions within a large fronto-temporo-parietal network sensitive to age. Interestingly, the areas whose atrophy is linked to executive abilities are quite similar to those evidenced in functional neuroimaging studies in young participants (see Collette & Van der Linden, 2002; Collette, Hogge, Salmon, & Van der Linden, 2006 for reviews). Therefore, using PLS multivariate analyses, we demonstrated that executive changes in normal aging are not dependent on atrophy in frontal areas only but rather comes from a grey matter volume decrease in a large antero-posterior brain network. [less ▲]

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See detailMODEL PREDICTIVE CONTROL OF CONGESTION AND VOLTAGE PROBLEMS IN ACTIVE DISTRIBUTION NETWORKS
Soleimani Bidgoli, Hamid ULg; Glavic, Mevludin ULg; Van Cutsem, Thierry ULg

in Proc. of CIRED Workshop 2014 (2014, June)

This paper presents a centralized control scheme, inspired of Model Predictive Control (MPC), to manage thermal overloads and correct abnormal voltages in real-time. The control scheme is able to smoothly ... [more ▼]

This paper presents a centralized control scheme, inspired of Model Predictive Control (MPC), to manage thermal overloads and correct abnormal voltages in real-time. The control scheme is able to smoothly bring the system within the desired limits, taking into account its near-future evolution. The control method effectiveness is illustrated on a 20-kV, 32-bus network hosting four distributed generation units. [less ▲]

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See detailCHARACTERIZATION OF PROTEINURIA IN DOGUE DE BORDEAUX DOGS USING ELECTROPHORESIS AND URINARY BIOMARKERS
Lavoué, Rachel; Smets, P.; Trumel, Cathy et al

in Proceedings of the 2014 ACVIM Forum (2014, June)

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See detailUsing intensive multiyear fish-pass monitoring to analyse seasonal upstream movement patterns of patrimonial holobiotic potomadromous fish species in a medium size river
Benitez, Jean-Philippe ULg; Nzau Matondo, Billy ULg; Dierckx, Arnaud ULg et al

in Proceedings of the 10th International Conference on Ecohydraulics (2014, June)

Belgian rivers are fragmented by numerous obstacles which considerably limit the free access of fish to functional habitats. Fish-passes are major tools used to increase stream continuity and improve ... [more ▼]

Belgian rivers are fragmented by numerous obstacles which considerably limit the free access of fish to functional habitats. Fish-passes are major tools used to increase stream continuity and improve connectivity in the upstream direction. Using two modern multispecies fish-passes, this study aims to investigate multiyear abundance of holobiotic potamodromous fish and their seasonal movement patterns in relation with environmental factors. The fish passes were monitored continuously during 5 and 7 years and are located in two Belgian streams: the (19.3m³.s-1) and the Berwinne (1.9m³.s-1). Results revealed the presence of 20 different fish species, 14 species in the Berwinne and 19 species in the occurrence, salmonids and cyprinids species were predominant. A great interspecific and intraspecific variability in capture periodicity and in terms of stimulation by combination of factor environmental was observed. This study highlights the complexity and the omnipresence of holobiotic potamodromous fish movements at different life stages, in medium size river and brings new information on fish passes efficiency and use by these poorly known species. [less ▲]

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See detailLe ciel étoilé d’Isis et d’Héphaïstos à Memphis
Veymiers, Richard ULg

Conference (2014, June)

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See detailCan we interpret linear kernel machine learning models using anatomically labelled regions?
Schrouff, Jessica ULg; Monteiro, Joao; Joao Rosa, Maria et al

Poster (2014, June)

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See detailEvaluation of troponin T on AQT90 Flex and COBAS 8000 as a rule in/out tool in an emergency ward
LE GOFF, Caroline ULg; EVRARD, Séverine ULg; BREVERS, Eric ULg et al

in Clinical Chemistry & Laboratory Medicine (2014, June), 52(Special Suppl), 510

BACKGROUND: Troponin measurement is the gold standard for diagnosis of Acute Myocardial Infarction (AMI). Troponin (highly sensitive (hs), T or I) is measured by immunochemistry instrument or by Point of ... [more ▼]

BACKGROUND: Troponin measurement is the gold standard for diagnosis of Acute Myocardial Infarction (AMI). Troponin (highly sensitive (hs), T or I) is measured by immunochemistry instrument or by Point of Care (POCT). POCT can be useful in emergency lab or ward for a faster diagnosis of patients with chest pain. Our study compared analytical performance of a POCT AQT90 Flex (Radiometer Medical) (AQT) and TnThs Cobas 8000 (Roche Diagnostics) (Cobas). We also compared the clinical performance of both methods at recommended cut-off (14 ng/L for Cobas and 30 ng/ L for AQT). METHODS: We selected 104 patients (296 samples) (range: 6-13822 ng/L) admitted in the Emergency ward for which at least 1 troponin determination (Cobas 8000) had been re-quested in the past 24 hours according to rule in/out procedure applied by this ward. Samples were then measured with the AQT. Inter-assay CV was maximum 8.6% and 9.6% for Cobas and AQT respectively. The cut-off defined as the 99th percentile for Roche was 14 ng/L and the recommended decision threshold value was 30 ng/L for Radiometer. Retrospective analysis of final diagnostic was obtained for all participants: we considered as “true positive” patients for whom a final diagnostic was ST segment-Elevation Myocardial Infarction (STEMI) or non STEMI (NSTEMI). RESULTS: On the whole range of measure, the 2 methods showed a good correlation (r2=0.98). Regression equation was Cobas = 0.98 AQT + 31 ng/L (95%CI of the intercept: (26.7;37.7) and 95% CI of the slope (0.96;1)). When we stratified, for the values <54 ng/L, the equation became Cobas = 0.52 AQT +1.1 ng/L (95%CI of the intercept: (-4.8;5.5) and 95% CI of the slope (0.39;0.69)). Bland and Altman plot did not show any bias. At admission [2-7 hours], 78 (81%) of admitted patients were finally considered as AMI, sensitivity was 92 % [96%] for Cobas and 78% [91%] for AQT. Specificity was 15% for Cobas (cut-off 14ng/L) or 73% (cut-off 54 ng/L) and 76% for AQT. CONCLUSIONS: Overall, there was a good correlation between the 2 methods. However, using a cut-off of 14 ng/L for Cobas is questionable for a rule in/out procedure in an emergency ward. Using 54 ng/L for Roche and 30 ng/L for AQT would have led to the best discrimination between patients presenting AMI or not. [less ▲]

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See detailRepresentations of Incident Reporting as a Collective Learning Process
Rossignol, Nicolas ULg; Turcanu, Catrinel

Conference (2014, June)

In the context of vulnerability analysis, it is now widely aknowledged that social factors should be taken into account, alongside technical ones. Depending on the particular approach adopted, these ... [more ▼]

In the context of vulnerability analysis, it is now widely aknowledged that social factors should be taken into account, alongside technical ones. Depending on the particular approach adopted, these social factors are considered to influence “coping capacities”, “adaptive capacities” or “resilience”. The ability of a socio-technical system to learn from past incidents and accidents seems to have a positive influence on its vulnerability, as it increases its capacity to adapt properly in case of future unwanted envents. To that regard, incident reporting systems are of first importance as they are supposed to constitute a collective memory of past incidents, to initiate a collective share of information and to foster collective learning and adapations. Yet, the theoretical assumptions about the ability of a reporting system to imply collective learning have still to be demonstrated. This paper proposes a methodology addressing this issue. To do so, we conduct a number of semi-structured interviews in a nuclear facility with various types of actors (managers, lab responsibles, technical workers), and in different risk contexts. In addition, participants are requested to produce a mental map of the reporting system they are concerned with. These inputs are then analyzed following a “cross-case analysis” procedure in order to identify patterns of actors' representations of the reporting system, and to link these patterns to potential learning processes fostered by the system. This constitutes the first step of an inductive research process aiming to identify and characterize the link between reporting systems and collective learning. In the next steps, the link between the identified patterns of representations and collective learning processes will be tested quantitatively. The final aim being to elaborate ways to improve Incident Reporting Systems to improve collective learning. [less ▲]

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See detailThe role of segmentation and investor recognition through the lens of cross-listing activity
Mouchette, Xavier ULg; Muller, Aline ULg; Carrieri, Francesca

Conference (2014, June)

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See detailBayes Adaptive Reinforcement Learning versus Off-line Prior-based Policy Search: an Empirical Comparison
Castronovo, Michaël ULg; Ernst, Damien ULg; Fonteneau, Raphaël ULg

in Proceedings of the 23rd annual machine learning conference of Belgium and the Netherlands (BENELEARN 2014) (2014, June)

This paper addresses the problem of decision making in unknown finite Markov decision processes (MDPs). The uncertainty about the MDPs is modeled using a prior distribution over a set of candidate MDPs ... [more ▼]

This paper addresses the problem of decision making in unknown finite Markov decision processes (MDPs). The uncertainty about the MDPs is modeled using a prior distribution over a set of candidate MDPs. The performance criterion is the expected sum of discounted rewards collected over an infinite length trajectory. Time constraints are defined as follows: (i) an off-line phase with a given time budget can be used to exploit the prior distribution and (ii) at every time step of the on-line phase, decisions have to be computed within a given time budget. In this setting, we compare two decision-making strategies: OPPS, a recently proposed meta-learning scheme which mainly exploits the off-line phase to perform policy search and BAMCP, a state-of-the-art model-based Bayesian reinforcement learning algorithm, which mainly exploits the on-line time budget. We empirically compare these approaches in a real Bayesian setting by computing their performances over a large set of problems. To the best of our knowledge, it is the first time that this is done in the reinforcement learning literature. Several settings are considered by varying the prior distribution and the distribution from which test problems are drawn. The main finding of these experiments is that there may be a significant benefit of having an off-line prior-based optimization phase in the case of informative and accurate priors, especially when on-line time constraints are tight. [less ▲]

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See detailDouble Sweep Preconditioners for propagation problems solved by Optimized Schwarz Methods
Vion, Alexandre ULg; Geuzaine, Christophe ULg

in Proceedings of the 6th International Conference on Advanced COmputational Methods in ENgineering, ACOMEN 2014 (2014, June)

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See detailThe role of segmentation and investor recognition through the lens of cross‐listing activity
Mouchette, Xavier ULg; Muller, Aline ULg; Carrieri, Francesca

Conference (2014, June)

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See detailStereoselective synthesis of peptidoglycan fragments on solid support
Simon, Justine ULg; Lamborelle, Nicolas ULg; Joris, Bernard ULg et al

Poster (2014, June)

The mammalian proteins, Nod1 and Nod2, are able to recognize peptidoglycan motifs during bacterial infection. Interestingly, Nod1 is a detector of peptides and muropeptides containing the meso-2,6 ... [more ▼]

The mammalian proteins, Nod1 and Nod2, are able to recognize peptidoglycan motifs during bacterial infection. Interestingly, Nod1 is a detector of peptides and muropeptides containing the meso-2,6-diaminopimelic acid (m-A2pm), a non-proteinogenic amino acid found in Gram- bacteria. In this work, we describe a synthesis of peptidoglycan motifs entirely on solid support. Solid-Phase Peptide Synthesis (SPPS), Cross Metathesis (CM) and sugar chemistry are three methods to anchor respectively amino acids, m-A2pm and sugars derivatives on a resin as solid support. [less ▲]

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See detailEstimated Subglottic Pressure Evaluation According to Vocal Pathology. Study on 418 Patients
Morsomme, Dominique ULg; Chareix, Hélène; FINCK, Camille ULg et al

Conference (2014, May 31)

Estimated subglottic pressure (ESGP) is part of the aerodynamic measurements included in the vocal profile. It is an indication of vocal effort and can guide the therapist in his clinical approach. We aim ... [more ▼]

Estimated subglottic pressure (ESGP) is part of the aerodynamic measurements included in the vocal profile. It is an indication of vocal effort and can guide the therapist in his clinical approach. We aim to examine the clinical interest of the ESGP by observing its values according to voice pathology, age, gender and sound pressure level. We also examine the relationships between PSGE, DSI and VHI. Method:The study includes 418 patients (M:118/W:300). Each patient’s file consists of VLS, acoustic, aerodynamic and perceptual measures. The ESGP was collected through the Phonatory Aerodynamic System Model 6600 (KayPentax). Patients produced 3 sequences of / ipipi / at low (IL), conversational (IC) and high (IH) intensity. Patients were grouped according to the ENT’s diagnosis. Results: Patients without vocal lesions (MTD) had a significantly lower ESGP compared to patients with nodules, polyps, inflammation, edema (IL, IC), cysts (IC) or scar (IC). Patients with vocal fold atrophy had a lower ESGP than those suffering from nodules and polyps at conversational and high intensity, but were not differentiated at low intensity. Amongst patients without lesions (MTD), a positive correlation appeared between ESGP and intensity; which was not the case for patients with lesions. At high intensity, men had a significantly higher ESGP than women. At low intensity, we noted a positive correlation between the VHI scores and ESGP levels. At low and conversational intensity, we observed a negative correlation between DSI and ESGP scores. Conclusion: This study highlights the importance of considering ESGP in the vocal profile. As expected, patients with vocal pathology produce high ESGP. However, the correlations between intensity and ESGP vary depending on the patient's pathology. In addition, ESPG values allow the clinician to distinguish MTD and healthy patients and thus could help the therapist in his clinical approach. [less ▲]

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See detailNumerical Investigation of Continuous Fiber Glass Drawing Process
Chouffart, Quentin ULg; Simon, Philippe; Terrapon, Vincent ULg

Conference (2014, May 30)

The manufacturing process of glass fibers used for the reinforcement of composite material consists in drawing a glass melt at high temperature through the bushing plate into fibers using a winder. This ... [more ▼]

The manufacturing process of glass fibers used for the reinforcement of composite material consists in drawing a glass melt at high temperature through the bushing plate into fibers using a winder. This process is sensitive to numerous disturbances that can cause the fiber to break during the drawing process. In order to understand the origin of these failures and improve the process efficiency, it is important to understand the physics of the forming fiber. We investigate here the underlying physics of the forming of a single fiber through numerical simulations. In particular, we focus on the region from the hole tips at the bushing plate to the glass transition point. The influence of key parameters (e.g. operating windows, and heat transfers mechanisms) on the fiber radius attenuation and the internal stresses is investigated through a sensitivity analysis. In addition, the impact of the temperature variations at the bushing plate is investigated. Finally, we show how the forming stress is influenced by these parameters. It is found that the internal stress can be minimizing by varying the operating windows. On the other hand, results also demonstrate that the heat pattern of the bushing plate is one of the most important causes for disturbance in the process. [less ▲]

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See detailUsing shear strain localisation to model the fracturing around gallery in unsaturated Callovo-Oxfordian claystone
Pardoen, Benoît ULg; Levasseur, Séverine ULg; Collin, Frédéric ULg

in 10th International Workshop on Bifurcation and Degradation in Geomaterials (2014, May 30)

Galleries drilling leads to damage propagation, fracturing and properties modifications in the surrounding medium. The prediction of the damaged zone behaviour is an important matter and needs to be ... [more ▼]

Galleries drilling leads to damage propagation, fracturing and properties modifications in the surrounding medium. The prediction of the damaged zone behaviour is an important matter and needs to be properly assessed. To do so the fractures can be modelled using shear strain localisation. The coupled local second gradient model is used under unsaturated conditions to correctly model the strain localisation behaviour. The permeability evolution and the rock desaturation due to air ventilation in galleries are considered. Finally, a hydro-mechanical modelling of a gallery excavation in Callovo-Oxfordian claystone is performed leading to a fairly good representation of the damaged zone. [less ▲]

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See detailBoard attributes and conditional conservatism: Evidence from French firms
Boussaid, Nabila ULg; Sougné, Danielle ULg; Hamza, Taher

Conference (2014, May 30)

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See detailWind Tunnel Testing of a VTOL MAV Propeller in Tilted Operating Mode
Theys, Bart; Dimitriadis, Grigorios ULg; Andrianne, Thomas ULg et al

in Proceedings of the 2014 International Conference on Unmanned Aircraft Systems (ICUAS 2014) (2014, May 30)

This paper presents experimental results of the full 3-axis force vector and 3-axis moment vector acting on a propeller, commonly used for a Vertical Take Off and Landing Micro Aerial Vehicle (VTOL MAV ... [more ▼]

This paper presents experimental results of the full 3-axis force vector and 3-axis moment vector acting on a propeller, commonly used for a Vertical Take Off and Landing Micro Aerial Vehicle (VTOL MAV). Measurements were carried out in a wind tunnel using a high resolution 6-axis force/moment sensor embedded in a customized test rig at several wind speeds, propeller rotational speeds and angles of the propeller shaft with respect to the air stream. Results show strong moments acting on the propeller in forward flight and unstable conditions in descending flight. Power calculations reveal a decrease in power consumption during slow forward flight and how motor efficiency can be maximized. [less ▲]

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See detailToward a Characterization of Western Operatic Singing Voices
Larrouy, Pauline ULg; Magis, David ULg; Nowak, Marion et al

Poster (2014, May 29)

Objective: One can easily recognize the musical style of a singer by listening to his/her sung performance. Several acoustical parameters of the Western operatic singing technique have been studied ... [more ▼]

Objective: One can easily recognize the musical style of a singer by listening to his/her sung performance. Several acoustical parameters of the Western operatic singing technique have been studied. However, the number of parameters could be extended and the effect of melody on these parameters remains unclear. By observing the effects of melody and technique on acoustical and musical parameters of the singing voice, this study aims at further characterizing the Western operatic singing technique. Methods: Fifty professional singers performed two contrasting melodies (popular song and romantic melody) with two vocal techniques (with and without operatic singing technique). The common quality parameters (energy distribution, vibrato rate and extent), perturbation parameters (standard deviation of the fundamental frequency, signal-to-noise ratio, jitter and shimmer) and musical features (fundamental frequency of the starting note, average tempo, and sound pressure level) of the 200 sung performances were analyzed. Results: The results show that the choice of melody had a limited impact on the acoustical and musical parameters observed, whereas a particular vocal profile appeared depending on the vocal technique employed. By examining these parameters in a theoretical model, this study highlights the relevance of vibrato rate, sound level, energy distribution, fundamental frequency of the starting note and tempo in describing the Western operatic singing technique. Conclusions: This study confirms that vocal technique affects most of the parameters examined and that the effect of melody is limited. In addition, the observation of quality and musical parameters contributes to a better understanding of the operatic singing technique. Conversely, the perturbation parameters don’t seem to take part in the characterization of operatic singing voices. Although the suggested theoretical model needs to be further developed in future research, it already generates implications for research and teaching. [less ▲]

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See detailRegulation in Practice: Choice among regulatory Tools
Bougnouch, Mehdi ULg; Gautier, Axel ULg

Conference (2014, May 28)

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See detailDesign of a spherical array of microphones for room acoustics applications.
Feron, Hermine; Embrechts, Jean-Jacques ULg

Conference (2014, May 28)

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See detailDesign of a sprayer that makes CE-ESI-MS easy and robust
Far, Johann ULg; De Pauw, Edwin ULg; Falmagne, Jean-Bernard et al

Conference (2014, May 28)

Presentation of a CEMS interface design for easy and robust coupling of Capillary Electrophoresis with Mass Spectrometry equipped with a nanospray source. Principles and specification were presented.

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See detailSynthesis of hybrid nanoparticles for theranostics
Liu, Ji ULg; Detrembleur, Christophe ULg; Duguet, Etienne et al

Conference (2014, May 28)

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See detailMaintaining people with multiple sclerosis at work: Validation of a questionnaire identifying their professional difficulties
Blavier, Adelaïde ULg; Monisse, Aurélie; Berkail, Radia et al

Poster (2014, May 27)

The purpose of this paper is to present the construction and validation of a questionnaire in order to evaluate the specific work difficulties and compensation mechanisms developed by multiple sclerosis ... [more ▼]

The purpose of this paper is to present the construction and validation of a questionnaire in order to evaluate the specific work difficulties and compensation mechanisms developed by multiple sclerosis patients (MS). At the moment, only few very recent questionnaires (in English) are constructed in order to highlight the link between the patients’ cognitive deficits with their professional situation (Doogan & Playford, 2014; Honan et al., 2012; McFadden et al., 2012). This lack of accurate assessment is detrimental to the patients’ job retention. Our questionnaire was constructed from review of literature and interviews of patients and experts. In order to validate our questionnaire and to test its specificity to MS patients, three groups of participants answered the questionnaire: MS patients, diabetic patients (diabetes is also a chronic illness but without any cognitive deficits contrary to MS) and a control group. We controlled the effect of anxiety and depression and we conducted a factorial analysis that showed the existence of 3 factors: the ergonomic factor (that includes cognitive difficulties and resources and adaptation process), the description of work situation and the social support. The three groups of participants obtained similar results for the work description and the social support while the group of patients with MS obtained a higher score than the other 2 groups for the ergonomic factor. These results suggest that our questionnaire is specific to the MS population and to the difficulties they specifically meet in their work situations. These results highlight new research opportunities and specific ways to increase job retention in MS population. [less ▲]

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See detailSynthesis of a glucosamine labeled amphiphilic polymer for drug delivery application
Riva, Raphaël ULg; Boyère, Cédric; Debuigne, Antoine ULg et al

Poster (2014, May 27)

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See detailDomain generality of serial order processing in short-term memory: Evidence from musical and verbal domains
Gorin, Simon ULg; Majerus, Steve ULg

Conference (2014, May 27)

Recent models of verbal short-term memory (STM) propose a distinction between item storage processes, which are viewed as domain-specific, and order storage processes, which are considered by some authors ... [more ▼]

Recent models of verbal short-term memory (STM) propose a distinction between item storage processes, which are viewed as domain-specific, and order storage processes, which are considered by some authors to be domain-general, at least as regards verbal and visual STM domains. Here we provide further evidence for domain-specific item STM processes and domain-general order STM processes by comparing item and order processing in verbal and musical STM domains. The musical domain is particularly relevant here given its reliance on different kinds of sequential processes (e.g., tones successions, rhythm). Using an interindividual differences approach, we administered to a group of young healthy adults different tasks requiring retention of item identity for words or tones, and tasks requiring retention of serial order information for word sequences or note sequences, as well as a task measuring retention abilities for rhythmic information. For the item STM tasks, we observed strong intercorrelations for within-domain WM measures, but not between-domain WM measures, after controlling for general WM abilities. For the serial order STM tasks, we observed a specific association with the rhythm STM task. These results highlight the importance of temporal sequential processes, as measured by the rhythm STM task, as a driving factor of domain-general STM processes in verbal and musical domains. They furthermore confirm the domain-specificity of item STM processes. [less ▲]

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See detailCorrelation and integration of the Rorschach Comprehensive System and the TCI-R questionnaire
Rentmeister, Daniel; Blavier, Adelaïde ULg; Di Piazza, Laetitia ULg et al

Poster (2014, May 27)

In this study, a dual purpose is sought. First, we statistically compare the Rorschach test interpreted by the Comprehensive System from J.E. Exner and the Temperament and Character Inventory – Revised by ... [more ▼]

In this study, a dual purpose is sought. First, we statistically compare the Rorschach test interpreted by the Comprehensive System from J.E. Exner and the Temperament and Character Inventory – Revised by R. Cloninger to highlight their differences and similarities. Second, through clinical cases, we discuss the relevance of integrating the results obtained by these two tools to establish a comprehensive and consistent psychological profile of an individual. For the statistical comparison, a sample of 27 “healthy” subjects (M = 24.37 years, SD = 2.75) was first submitted to the Rorschach test. Then, immediately after, each subject completed the TCI-R. A correlation analysis (Pearson Rho) was done between various Index and a Bonferroni adjustment was made. For the case studies, 3 subjects were recruited. Anamneses were carried out and the Rorschach test and TCI-R administered. Our first results, which are to be taken with caution because of the small number of subjects in the sample, must be qualified and discussed. From 2448 statistical comparisons, we select the most relevant and discuss different correlation results. The case studies show a concordance in social relationships and impulsivity; and show that the information peculiar to each test allows us to complete the subject’s profile. Finally, it is by addressing two different epistemologies underlying these two tests that we can best explain the psychological differences highlighted in the same individuals. We conclude by suggesting that this difference in results must certainly be understood in an integrative logic and emphasizes the complementarity between these two tests. [less ▲]

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See detailEmpathy and social relationships in suicidal adolescents
Jadin, Aurore ULg; Vermaelen, Noémie; Blavier, Adelaïde ULg

Poster (2014, May 27)

Empathy and suicide among minor people are two research topics currently very explored. Psychologists often speak about suicide because it represents the second cause of mortality among 15-24-year-old ... [more ▼]

Empathy and suicide among minor people are two research topics currently very explored. Psychologists often speak about suicide because it represents the second cause of mortality among 15-24-year-old adolescents (Delvenne, 2005). Several studies have already analyzed the links between empathy skills and some psychopathology (behavioral disorders, hyperactivity and alcoholism) but no research before this one has developed empathic abilities in suicidal adolescents. The aims of the present study were respectively to examine suicidal adolescents’ empathy skills, interpersonal capacities and to investigate the quality of their social relationships. [less ▲]

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See detailDetection of eye movements specific to drowsiness and their relation with subjective assessment: A cognitive ergonomic approach.
Blavier, Adelaïde ULg; Montagnino, Cédric; Wertz, Jérôme ULg et al

Poster (2014, May 27)

Drowsiness is one of the major factors explaining accidents, particularly in traffic accidents but also in work situations with serious consequences (e.g. medicine). The drowsiness may be assessed by ... [more ▼]

Drowsiness is one of the major factors explaining accidents, particularly in traffic accidents but also in work situations with serious consequences (e.g. medicine). The drowsiness may be assessed by diverse measures that vary from physiological and unconscious data (e.g. EEG) to subjective and conscious evaluation. In their daily life, people are used to evaluate their drowsiness by subjective assessment and research observes a great inter-individual variation in this evaluation. Moreover, the subjective evaluation is dependent on the situation and the risk perceived by the person (e.g., new versus usual situations, simple versus complex environments, etc.). In this theoretical context, our purpose was to investigate the links between 1) objective performance (reaction time) measured by a psychomotor vigilance task (PVT), 2) data from eye movements and 3) subjective assessment of drowsiness (measured with Karolinska Sleepiness Scale, KSS). 12 persons, aged from 20 to 56, participated individually. They were asked to respect a 60% sleep deprivation during the night before the experiment and to not drink any energy drinks the day of the experiment. The experiment was conducted between 1 and 3 PM after a heavy lunch in order to increase the circadian effect. Moreover, the temperature of the room was 25° in order to increase drowsiness. Each participant was asked to perform 4 PVT. However, although 100% of participants performed the first two PVT, only 66% were able to perform the third PVT and only 33% of participants performed the fourth and last PVT. Our results showed an effect of time on objective performance, eye movements and subjective assessment of drowsiness in PVT 1 and 2: significant increase of reaction time, increase of eye closure and perclos, reduction of pupil diameter and increase of subjective drowsiness estimation (KSS). Only the frequency and duration of blinks remained constant across time. In PVT 3 and 4, data from eye movements and objective performance (reaction time) did not vary anymore across the time. Only the subjective estimation of drowsiness (KSS) continued to increase. Furthermore, subjective estimation of drowsiness was differently correlated with eye movements and objective performance across the PVT; it was significantly correlated with reaction time (PVT 1,2,3), blink frequency and duration (PVT 1,2,3), perclos (PVT 1,2,3,4), eye closure (PVT 2,3), pupil diameter (PVT 1,2,3,4). These results are discussed and integrated in an ergonomic approach in order to analyze the links between objective performance, eye movements and subjective assessment of drowsiness. [less ▲]

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See detailDe l'analyse des pratiques discursives aux modalités de conception
Joachim, Guillaume ULg; Roosen, Marie ULg; Dondero, Maria Giulia ULg

Conference (2014, May 27)

Cette communication aborde l’étude des interactions entre architectes exploitant différentes ressources (parole, dessin, geste) dans leur pratique professionnelle collaborative de conception. Elle portera ... [more ▼]

Cette communication aborde l’étude des interactions entre architectes exploitant différentes ressources (parole, dessin, geste) dans leur pratique professionnelle collaborative de conception. Elle portera sur des questions méthodologiques, en s’attachant à décrire les apports possibles de travaux de linguistique appliquée à l’analyse de la communication multimodale en architecture. La communication dans les processus de conception est fréquemment abordée à partir de représentations graphiques en tant que procédés de production ou de transmission de connaissances. En effet, c’est en grande partie par le dessin qu’un concepteur donne forme à l’objet qu’il étudie, qu’il le communique à autrui et avant tout qu’il se le représente à lui-même. S’il est avéré que les professionnels de l’architecture utilisent diverses figures comme outils pour représenter et transmettre graphiquement un objet encore inexistant, le champ théorique de la discipline possède par contre peu d’outils méthodologiques permettant de témoigner ou d’analyser minutieusement in vivo la dimension heuristique des échanges entre concepteurs mobilisant plusieurs modalités de communication simultanées. Or, les travaux empiriques de Charles Goodwin (UCLA) inspirés de l’ethnométhodologie et de Lorenza Mondada (UNI Basel) issus de la linguistique appliquée, se sont attachés à l’étude de situations discursives multimodales et ont développé des méthodes découlant de l’analyse conversationnelle. Ces deux approches transdisciplinaires présentent notamment la possibilité aux chercheurs d’analyser à différents niveaux l’articulation de représentations graphiques, gestuelles et verbales et d’identifier la fonction des différentes modalités dans la construction collective du sens et dans l’élaboration d’objets de connaissance propres à une discipline. Nous questionnerons l'intérêt de ces transferts et emprunts d’outils méthodologiques sur l’étude des interactions entre architectes : comment nous aident-ils potentiellement à cerner les procédés par lesquels ces acteurs co-élaborent des objets de savoir utiles pour leur activité ? Quelles contributions inédites produisent-ils pour approcher la cognition dans les processus de conception ? Cette étude expérimentale et réflexive sera enfin l’occasion de décrire brièvement les limites d’une translation des outils de l’analyse interactionnelle située sur l’appréhension des pratiques professionnelles de conception architecturale. [less ▲]

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See detailJuvenile sexual offenders: Can their language tell us how their mind works?
Courtain, Audrey; Glowacz, Fabienne ULg

Poster (2014, May 27)

A significant proportion of sexual delinquency being committed by juveniles, various fields of research have studied this topic. Still, little is known about the relation between the linguistic ability ... [more ▼]

A significant proportion of sexual delinquency being committed by juveniles, various fields of research have studied this topic. Still, little is known about the relation between the linguistic ability and the cognitive functioning of this specific youth. Rooted in scientific works which have explored indirectly the point, this poster attempt to question the quality of language as a mean to find out how their mentalization occurs, but also to question how their cognitive processes (e.g. empathy) influence their language. These hypothesis are to be tested soon with a clinical sample of 47 participants and with different measures (e.a. MACI, verbal IQ, IRI). Hence, the opportunity to evaluate, among others, empathy deficits and cognitive distortions through language can be considered a promising approach allowing new perspectives for prevention, assessment and treatment of juvenile sexual offenders. [less ▲]

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See detailDevelopment of the Abilities to Acquire New Orthographic Representations from Grades 2 to 6
Binamé, Florence ULg; Poncelet, Martine ULg

Conference (2014, May 27)

Unlike English, little attention has been accorded to orthographic learning in French which has a challenging spelling due to its high level of inconsistency. There is evidence that the mastery of ... [more ▼]

Unlike English, little attention has been accorded to orthographic learning in French which has a challenging spelling due to its high level of inconsistency. There is evidence that the mastery of alphabetic decoding is critical to acquire word-specific orthographic representations (Share 1995). It is also generally admitted that orthographic processing skills are involved in orthographic learning beyond the core phonological component. Even if these skills still remain underspecified, research particularly focuses on the sensitivity to orthographic constraints. While Pacton et al. (2013) have shown that graphotactic knowledge influences the learning of new spellings, little is known about the development of this knowledge over time. Our aim was to determine the developmental trajectory of orthographic word form acquisition abilities within the French orthography by assessing the speed of acquisition of new orthographic forms as well as the sensitivity to orthographic regularities. Five groups of forty French-speaking children from grades 2 to 6 took part in the study. We proposed two experimental tasks. The first consisted of an orthographic learning of 10 new orthographic forms (inconsistent in spelling) by using a repeated spelling paradigm. In practice, children were firstly asked to read aloud each item once. Then, the experimenter dictated each item ten times in a mixed order. The capacity of retention of the new representations was assessed one week later with a dictation task. The second task aimed at determining the sensitivity to different French orthographic regularities by means of an orthographic choice task containing 62 pairs of non-words homophones. Moreover, general reading and spelling abilities were also assessed. Results show that the speed of orthographic learning and the capacity of long-term retention significantly increase during the first years but do not differ anymore between grades 4-5 and 5-6, suggesting that older children have reached a nearly maximal potential in their learning capacities. Nevertheless, the general orthographic abilities, which are more dependent on scholar knowledge, continue to develop significantly during school years. Furthermore, sensitivity to orthographic regularities increases significantly only from grade 2 to 3, indicating that children as soon as 9 years-old are already able to extract different graphotactic patterns of their writing system. Pacton, S., Sobaco, A., Fayol, M., & Treiman, R. (2013). How does graphotactic knowledge influence children’s learning of new spellings? Frontiers in Psychology, 4, 1-10. Share, D. (1995). Phonological recoding and self-teaching: sine qua non of reading acquisition. Cognition 55, 151-218. [less ▲]

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See detail[18F]UCB-H AS A BRAIN SV2A RADIOTRACER: A FIRST CLINICAL TRIAL
Bahri, Mohamed Ali ULg; Bastin, Christine ULg; Aerts, Joël ULg et al

Poster (2014, May 27)

[18F]UCB-H is a fluorine-18 radiolabelled PET imaging tracer with a high affinity for the synaptic vesicle protein 2A (SV2A). This protein, involved in vesicle trafficking and widely distributed in the ... [more ▼]

[18F]UCB-H is a fluorine-18 radiolabelled PET imaging tracer with a high affinity for the synaptic vesicle protein 2A (SV2A). This protein, involved in vesicle trafficking and widely distributed in the brain, represents the binding site and the primary mechanism of the antiepileptic drug levetiracetam. Levetiracetam has recently been suggested to reduce synaptic deficits in a mouse Alzheimer’s disease model and to improve cognition in patients with amnestic mild cognitive impairment, suggesting a possible role for this protein in synaptic integrity. The objective of this study was to investigate the cerebral distribution of [18F]UCB-H in healthy human volunteers. Dynamic PET imaging of the head of four healthy volunteers was performed over 100 minutes after injection of 170.4 ± 24.9 MBq of GMP produced [18F]UCB-H. The input function was acquired by arterial blood sampling during the dynamic PET acquisition. Blood data analysis showed a consistent tracer amount in whole blood and plasma indicating a very low degree of binding of the tracer to the red blood cells. Unchanged [18F]UCB-H fraction in plasma follows a bi-exponential behavioral decrease with a starting fraction of 92% of the injected amount of the tracer, measured at 3 min post injection. This fraction decreases to about 50% at 10 min post injection. The [18F]UCB-H PET data revealed a high and rapid uptake in the grey matter structures, matching the known ubiquitous distribution of SV2A in the brain. The kinetics of the tracer in the brain was characterized by an initial high uptake phase followed by rapid washout allowing the standard compartmental modeling (1-tissue compartment, 2-tissue compartment, and Logan graphical analysis). The three models gave consistent results. The two-tissue compartment model fitted the experimental data best and provided a total distribution volume of [18F]UCB-H in the brain greater than 7 mL/cm3 and a specific distribution volume around 3 mL/cm3. Our results indicate that [18F]UCB-H is a new radiotracer for brain SV2A proteins suitable for human studies. Further studies are warranted to assess SV2A modifications in neurological pathologies such as Alzheimer’s disease. [less ▲]

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See detailPréférences résidentielles et production du logement en banlieue périurbaine
Halleux, Jean-Marie ULg; Strée, Julie

Conference (2014, May 27)

La communication traitera des relations entre les mécanismes de la production immobilière et les préférences résidentielles. Elle visera à vérifier l’hypothèse selon laquelle nous assistons à l’émergence ... [more ▼]

La communication traitera des relations entre les mécanismes de la production immobilière et les préférences résidentielles. Elle visera à vérifier l’hypothèse selon laquelle nous assistons à l’émergence et au renforcement de préférences susceptibles de remettre en cause le modèle périurbain du pavillon périphérique. Notre propos s’inscrit donc dans la réflexion sur le futur des zones périurbaines (Grant et al., 2013). Notre recherche a consisté dans la réalisation et l’analyse d’une enquête menée au sein de la zone métropolitaine de Bruxelles, auprès de ménages habitant un logement neuf (Strée et Halleux, 2013). Les ménages ont été interrogés sur leurs préférences résidentielles ainsi que sur leurs propensions à payer pour différents types de produits immobiliers. Son échantillon est constitué de 120 ménages ayant été interrogés en face à face à leur domicile. L’échantillon a été stratifié en fonction de deux critères : la localisation au sein de la zone métropolitaine et le type de logements. Concernant la localisation, des enquêtes ont été menées à Wavre (commune située à une demi-heure voiture du centre de Bruxelles) et en plus lointaine périphérie, à Perwez et Chastre (communes situées à une heure voiture du centre de Bruxelles). Concernant les types de logement, la stratification s’est opérée de la manière suivante : 40 % des ménages résident dans une habitation quatre façades, 30 % dans une habitation mitoyenne et 30 % dans un appartement. Un premier résultat de notre enquête est de confirmer la prégnance du modèle de la maison unifamiliale isolée (quatre façades), qui représente le logement idéal pour 69 % de l’échantillon (y compris par 70 % des ménages résidant dans une habitation mitoyenne et par 57 % des ménages résidant en appartement). Pour autant, en comparaison d’enquêtes précédentes, les propensions à payer témoignent d’une bonne acceptation des produits immobiliers alternatifs. Sur base d’enquêtes précédentes réalisées dans le périurbain de Liège, nous nous attendions à une moins-value de 15 à 20 % entre le produit de la maison isolée et le produit de la maison jointive. Or, la différence observée est ici inférieure à 10 %. Cette situation est à relier à la problématique de la disponibilité en zones constructibles (Halleux et Strée, 2012). En effet, le bassin d’emploi bruxellois se caractérisant par une faible disponibilité foncière, cela conduit à banaliser la promotion commerciale de logements jointifs. Au sein de ces territoires, les ménages auraient donc bien intégré ce type de développements. Au sein d’autres territoires aux marchés fonciers moins tendus, nous aurions probablement observé des consentements à payer plus élevés pour la maison isolée, consentements qui auraient alors pu être interprétés comme un signe de stigmatisation vis-à-vis du logement jointif. Au final, nous mettons en avant un effet systémique où, par son impact sur la multiplication des projets de maisons mitoyennes, la rareté de l’offre foncière conduit à renforcer l’acceptation de la demande pour ce type de produits immobiliers. Parmi les autres résultats de notre enquête, soulignons la forte valorisation de la maison de 100 m2 qui, en comparaison d’appartements de la même superficie, est valorisée à un niveau moyen 13 % supérieur. Il existe donc un potentiel commercial important pour la petite maison. Cela représente à la fois une menace pour la consommation d’espace et une opportunité pour la densification douce. Il ressort également de nos enquêtes qu’une localisation intra-urbaine (dans un quartier « ancien ») est fortement dévalorisée. Pour autant, un signal encourageant tient ici à la relation entre l’âge du répondant et cette dévalorisation : les effectifs de moins de 40 ans dévalorisent moins les quartiers densément bâti que les populations plus âgées. Il s’agit là d’un résultat qui s’inscrit dans l’hypothèse de Grant et al. (2013) quant au renforcement de la demande pour des localisations plus urbaines et plus centrales. [less ▲]

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See detailInfluence of melodic context on the perception of vocal pitch accuracy
Beeken, Manon; Morsomme, Dominique ULg; Larrouy, Pauline ULg

Poster (2014, May 27)

In order to categorize sung performances as “in tune” or “out of tune”, one can measure the deviation between the performance and the musical notation. Depending on the study, a deviation of a semitone ... [more ▼]

In order to categorize sung performances as “in tune” or “out of tune”, one can measure the deviation between the performance and the musical notation. Depending on the study, a deviation of a semitone (100 cents) or a quartertone (50 cents) is considered as “out of tune”. However, these values are arbitrary and the current study aims to define perceptual thresholds of pitch accuracy in a melodic context. For this purpose, melodic sequences were manipulated, from “in tune” (deviation of 0 cent) to “out of tune” (10 to 80 cents, in 10 cents steps). In a 2x2x2 design we systematically varied the conditions of: melodies (ascending/descending target-interval), type of errors (interval or tonality deviation), and direction of the deviation (enlargement or compression). The sequences were presented to 30 non-musicians using the method of limits procedure, in a test/retest paradigm. For each condition, they were asked to specify whether the presented singing performances were “in tune” or “out of tune”. The results showed that participants were consistent in their evaluation between the test and the retest. The pitch accuracy threshold (M = 29 cents, ES = .75) was not influenced by the melody, the type of errors, and the direction of the deviation. This study highlights the ability of non-musicians to perceive small pitch deviations (less than a quartertone) in a melodic context. This finding elucidates on the concept of pitch accuracy and therefore yields the opportunity to revise objective tools for the evaluation of singer pitch accuracy. [less ▲]

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See detailLong protocols to Rorschach Comprehensive System and a posteriori reduction of number of responses: What is the impact on the clinical interpretation ?
Dufour, Cristelle; Englebert, Jérôme ULg; Blavier, Adelaïde ULg

Poster (2014, May 27)

Our study was interested in the exceptionally long protocols, superior to 55 answers, supplied by five subjects in the test of Rorschach according to the method of the Comprehensive System. In order to ... [more ▼]

Our study was interested in the exceptionally long protocols, superior to 55 answers, supplied by five subjects in the test of Rorschach according to the method of the Comprehensive System. In order to gain understanding of which attitude to adopt in front of this kind of protocol, we made a a posteriori reduction of the number of answers by basing us on the recommendations of Exner (Exner, on 2001), then a comparative study between the clinical interpretation realized with all of the answers and with only the first five answers by board. We also replicate this methodology of a posteriori decrease of the number of answers with four answers by board according to the new recommendations of the system R-PAS of Meyer and al. (Meyer and al, on 2009). The sample consists of three raw coal subjects and two psychiatric subjects. Our analysis highlighted a stability of certain variables (EB, Lambda, EA for example) but a difference in the psychological profile of the subjects after reduction. We observed a clarification of the fundamental difficulties to the psychiatric subjects and rather a neutralization of these difficulties for the raw coal subjects, with particularly defence mechanisms which seem more adapted. In our sample, the consideration of all of the answers or only of the partial protocol thus brings a difference in the clinical interpretation ; as a consequence any reduction should be made with big caution. Our study allows to discuss current practices of the test of Rorschach, by looking for a compromise between the inherent constraints to the validity of the test and the questions of the clinical complexity decrease appropriate to any initiative of standardization. [less ▲]

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See detailAn innovative lens surface functionalization to control Posterior Capsular Opacification
Huang, Yi-Shiang ULg

Poster (2014, May 26)

Cataract is the opacity of the lens, causing impairment of vision or even blindness and the surgery is still the only available treatment today. The intraocular lens (IOL) is a polymer implant designed to ... [more ▼]

Cataract is the opacity of the lens, causing impairment of vision or even blindness and the surgery is still the only available treatment today. The intraocular lens (IOL) is a polymer implant designed to replace the natural lens in the cataract surgery. However, the bio-inert materials could not satisfy the unmet need in the secondary cataract control. Posterior capsular opacification (PCO, or Secondary Cataract), characterized by a thick and cloudy layer of lens epithelial cells (LECs), is the most common postoperative complication. For the present study, a bioactive molecule is immobilized onto the conventional acrylic hydrophilic polymer pHEMA (Poly(2-hydroxyethyl methacrylate)) using oxygen plasma treatment followed by dip-coating deposition. The RGD peptide sequence, being well-known for its ability to promote cellular attachment by binding to integrin receptors, is designed to stimulate the adhesion of LECs on the IOL. The data have shown the peptide immobilized biomaterial not only exhibits similar optical and physical properties, but also reveals enhanced bio-logical properties in cell adhesion and cell morphology maintenance. By means of surface functionalization of IOL to stimulate LECs adhesion, the secondary cataract could be controlled. [less ▲]

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See detailImpact of the Structure of Biocompatible Aliphatic Polycarbonate on siRNA Transfection Ability
Frère, Antoine ULg; Kawalec, Michal; Tempelaar, Sarah et al

Conference (2014, May 26)

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See detailMultilayered chitosan-based fibers for skin regenaration applications
Croisier, Florence ULg; Detrembleur, Christophe ULg; Jérôme, Christine ULg

Poster (2014, May 26)

Chitosan is a natural polymer derived from the chitin of crustacean or mushroom shells, that intrinsically presents haemostatic, mucoadhesive, antimicrobial and immunostimulant properties. This ... [more ▼]

Chitosan is a natural polymer derived from the chitin of crustacean or mushroom shells, that intrinsically presents haemostatic, mucoadhesive, antimicrobial and immunostimulant properties. This polysaccharide has shown a great potential for biomedical and pharmaceutical applications, on account of its remarkable compatibility with physiological medium. Besides, it is degraded in a physiological environment into non-toxic products, which make chitosan an outstanding candidate for short- to medium-term applications. In this respect, nanometric fibers are highly interesting as their assembly mimics the skin extracellular matrix structure. Such nanofibrous materials can be prepared by electrospinning (ESP). This technique uses a high voltage to create an electrically charged jet of polymer solution or melt which leads to fibers formation. Depending on the polymer characteristics (a.o. molecular weight, solution viscosity and conductivity) and processing conditions (electric potential, distance between syringe-capillary and collection plate, concentration, flow rate), polymer fibers ranging from nanometers to a few microns in diameter can be obtained and subsequently used as potential scaffolds, a.o. to form a temporary, artificial extracellular matrix. In the present study, electrospinning technique was combined with layer-by-layer deposition method (LBL) - a well-known method for surface coating, based on electrostatic interactions - in order to prepare multilayered chitosan-based nanofibers. The antibacterial properties of the obtained material were then assessed, and the presence of a multilayered deposit was confirmed by several techniques. The multilayered chitosan-based nanofibers produced present great prospects for the preparation of new biomedical scaffolds - such as wound dressings that could improve skin regeneration. [less ▲]

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See detailEstimating Antarctic ice sheet surface mass balance contribution to future sea level rise using the regional atmospheric climate model MAR
Agosta, Cécile ULg; Fettweis, Xavier ULg; Gallée, Hubert

Conference (2014, May 26)

The Antarctic ice-sheet surface mass balance (SMB) is a significant contribution to sea level changes which may mitigate the rise in sea level in a warmer climate, but this term is still poorly known. The ... [more ▼]

The Antarctic ice-sheet surface mass balance (SMB) is a significant contribution to sea level changes which may mitigate the rise in sea level in a warmer climate, but this term is still poorly known. The Antarctic SMB cannot be directly deduced from global climate models (GCMs) because of their too low resolution (~100 km) and their unadapted physic over cold and snow-covered areas. That is why the use of a regional climate models (RCM) specifically developed for polar regions is particularly relevant. We present here new estimations of the Antarctic SMB changes for the 20th and the 21st century at 40 km of resolution with the MAR (Modèle Atmosphérique Régional) RCM. Recent studies showed that large scale forcing from GCMs was the main source of uncertainty for RCM-deduced SMB, thus we first present a carefully analysis of the CMIP5 GCMs (used in the AR5 IPCC report) compared to the ERA-Interim reanalysis over the Antarctic region, from which we could select the less biased large scale forcing for MAR. We thus show the Antarctic SMB evolution as modeled with MAR forced by ACCESS1-3 for RCP 4.5 and 8.5 greenhouse gaz scenarios. We evaluate our outputs by comparing MAR forced by ACCESS1-3 and ERA-Interim for the 1980-2000 period to more than 2700 quality-controlled observations and to surface meteorological data from the READER database. We then give SMB changes estimations for the 21st century together with an analysis of uncertainties coming from the MAR model, the GCM forcing and the greenhouse gaz scenarios. [less ▲]

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See detailTECTONIQUE ACTIVE ET EVOLUTION DU RELIEF STRUCTURAL DE L’AURES SEPTENTRIONAL
Benabbas, Chaouki; Draidia, Salah ULg; GRECU, Florina

Conference (2014, May 26)

La masse sédimentaire de l’Aurès septentrional (Atlas saharien oriental) a une épaisseur qui dépasse 7000 mètres. Cette masse imposante présente une série à peu près concordante du Jurassique supérieur à ... [more ▼]

La masse sédimentaire de l’Aurès septentrional (Atlas saharien oriental) a une épaisseur qui dépasse 7000 mètres. Cette masse imposante présente une série à peu près concordante du Jurassique supérieur à l’Eocène moyen, par des alternances de roches cohérentes : de calcaires et dolomies du Portlandien et du Berriasien, calcaires, grès et dolomies de l’Hauterivien, grès du Barrémien, dolomies de l’Aptien, grès de l’Albien, calcaires du Cénomanien, du Turonien, du Maastrichtien et de l’Eocène et des roches meubles; marnes cénomaniennes, santoniennes, campaniennes et éocènes. Ces alternances favorisent le développement d’un relief structural par érosion différentielle. La majorité des éléments de ce relief structural sont conformes à la structure tels que les chaînons et les dépressions orientés NE- SW et qui correspondent à des anticlinaux et des synclinaux pluri kilométriques de direction N 60° E. Par ailleurs, cette diversité est liée aussi à la complexité de l’histoire géologique (héritage morpho structural) d’une part et une évolution Plio Quaternaire très active, caractérisée essentiellement par des mouvements verticaux d’autre part. En fait, le contexte géodynamique en général et la tectonique active en particulier semble jouer un rôle essentiel dans la mise en place de ce relief structural ainsi que son évolution. Cette étude se donne comme objectifs, l’identification et la caractérisation des morpho structures qui favorisent l’évolution et le démembrement de ce relief, jeune et vigoureux. [less ▲]

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See detailIn search of a physiological role for thiamine triphosphate and the 25-kDa thiamine triphosphatase
Bettendorff, Lucien ULg; Lakaye, Bernard ULg; Kohn, Grégory ULg et al

Conference (2014, May 25)

In search of a physiological role for thiamine triphosphate and the 25-kDa thiamine triphosphatase L. BETTENDORFF, B. LAKAYE, G. KOHN AND P. WINS GIGA-Neurosciences, University of Liège, 4000-Liège ... [more ▼]

In search of a physiological role for thiamine triphosphate and the 25-kDa thiamine triphosphatase L. BETTENDORFF, B. LAKAYE, G. KOHN AND P. WINS GIGA-Neurosciences, University of Liège, 4000-Liège, Belgium Thiamine triphosphate (ThTP) was discovered over 60 years ago. Although it is present in most organisms from bacteria to mammals, its possible biological functions remain unclear. In contrast to thiamine diphosphate (ThDP), it is not a coenzyme. In E. coli cells, ThTP is transiently produced in response to amino acid starvation, while in mammalian cells, it is constitutively produced at a low rate. In some animal tissues, ThTP was able to phosphorylate proteins and activate a high-conductance anion channel in vitro. These observations raised the possibility of ThTP being part of a still uncharacterized cellular signaling pathway. Though it was long thought that ThTP is synthesized by a specific ThDP:ATP phosphotransferase, more recent studies indicate that two main mechanisms are involved: (1) in the cytosol adenylate kinase 1 can catalyze ThTP production from ThDP and ADP and (2) in brain mitochondria FoF1-ATP synthase can catalyze ThTP production from ThDP + Pi. The latter reaction is energized by the respiratory chain through a chemiosmotic mechanism analogous to oxidative phosphorylation. Both mechanisms are conserved from bacteria to mammals. While ThTP synthesis does not seem to require a specific enzyme, its hydrolysis in mammalian tissues is catalyzed by a very specific cytosolic 25 kDa thiamine triphosphatase (ThTPase). Because of this activity, steady-state ThTP levels are kept low in mammalian cells. ThTPase belongs to the CYTH superfamily of proteins which has representatives in all superkingdoms of life acting on tripolyphosphate and various triphosphorylated substrates. Although the whole chromosome region containing the ThTPase gene was lost in birds, orthologs of the ThTPase gene were found in all other known metazoan genomes. It seems that ThTPase activity appeared as a secondary acquisition of the CYTH proteins in the lineage leading from cnidarians to vertebrates. In particular, the Trp-53 residue of mammalian ThTPases plays a key role in substrate recognition and specificity by interacting with the thiazole part of ThTP. This residue is conserved in metazoan CYTH proteins with ThTPase activity. In order to gain insight into the physiological function(s) of the ThTP-ThTPase couple, we tried to produce a mouse invalidated in 25-kDa ThTPase. Surprisingly, we were unable to obtain any knockout animal, apparently because ThTPase seems to be required for spermatogenesis. As we previously showed that the enzyme is much more abundant in differentiated versus undifferentiated cells, we suspect that 25-kDa ThTPase might play a more general and important role during cell differentiation. Acknowledgments This work was supported by the F.R.S.-FNRS. LB and BL are respectively Research Director and Research Associate at the F.R.S.-FNRS. [less ▲]

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See detailThe physical education teacher as a physical activity promoter : Current developments
Cloes, Marc ULg

Conference (2014, May 24)

The current society needs to fight against the growing of sedentary lifestyles among the population all around the world. The school environment is identified as a pillar of the multisectorial approach ... [more ▼]

The current society needs to fight against the growing of sedentary lifestyles among the population all around the world. The school environment is identified as a pillar of the multisectorial approach that should be implemented to avoid that children who born today do not live less longer than their parents. The presentation will focus on four topics: (1) The role of school in physical activity (PA) promotion; (2) The dimensions of PA at school; (3) The action that physical education (PE) teacher can play; (4) The role of PE teacher educators in the improvement of the PE adaptation to the current needs. For one child, there are several opportunities to be physically active at school but the part of the school in youth PA is not well documented. Since recently, the only strong evidence of the effectiveness of interventions aiming to promote PA in youth was identified in adolescents when school and family/community environments are combined. However, some reviews have now revealed that school-based PA interventions can be effective for improvements in BMI, motor performance, physical activity, knowledge … In order to design one PA promotion project at school, five dimensions should be considered: (1) Physical education; (2) Sport at school (links to the community); (3) Active transportation; (4) Life environment (recesses, spaces); (5) Physical activity in the classroom. All these dimensions should be supported by a strong school policy that considers PA as a key aspect for the youth development. It means that packages of school-based strategies need to be developed. Nevertheless, PE seems to be a central aspect emphasizing the key role of the PE teachers who should become the PA promoters in every school. Unfortunately, since few decades, PE is facing a worldwide crisis raising questions about its quality and focusing on the teaching process, the inadequate school-community co-ordination, the focus on competition performance sport and the lack of interest on basic human movement and needs. Three concepts are now influencing some changes: (1) The physical literacy; (2) The accountability, and; (3) The Quality Physical Education (QPE). This means that, in PE, a special emphasis should now be set on the acquisition by the youth of knowledge, skills and attitude that will make them physically educated persons for their whole life, with the purpose to reach concrete improvements and to respect students’ needs and motivational characteristics. PE teachers have to show what they are doing in the promotion of an active lifestyle, using sports like a tool for general aims and not as a final objective. On the field, this means that new contents and teaching strategies have to be developed. The involvement of the students and the implementation of their learning into the real life should become a priority. Collaboration with other actors of the educational community (other teachers, parents) or the local community (sport clubs, sport administrations, private sector …) should be developed. PE teachers have to take these new roles. To achieve such change, they need to be supported by the PE teacher educators who have to emphasize the new educating strategies, develop concrete material and resources, contribute to create communities of practice, provide evidence based data supporting the effectiveness of the new approaches. The presentation will propose systematic ‘give and go’ between theory and practice in order to connect researchers and physical education teachers, underlining that PE can only grow with such collaboration and development of a networking. [less ▲]

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See detailCréativité et rétablissement
Vandeninden, Elise ULg

Conference (2014, May 23)

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See detailAllergies alimentaires : quel bilan ?
GADISSEUR, Romy ULg

Conference (2014, May 23)

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See detailAge de retraite et risque de démence : effet du genre et de la profession
Grotz, Catherine ULg; Letenneur, Luc; Meillon, Céline et al

Conference (2014, May 23)

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See detailReprésentations marginales dans les stemmas de Lucien Tesnière
Mazziotta, Nicolas ULg

Conference (2014, May 23)

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See detailDe France-Ville à la Panachie : (in)confort urbain et hygiène sociale dans le roman dystopique (1880-1940)
Stienon, Valérie ULg

Conference (2014, May 22)

Si la dystopie française choisit volontiers pour cadre la métropole parisienne, elle développe aussi la représentation de villes imaginaires, généralement désignées par un toponyme original : France-Ville ... [more ▼]

Si la dystopie française choisit volontiers pour cadre la métropole parisienne, elle développe aussi la représentation de villes imaginaires, généralement désignées par un toponyme original : France-Ville (Jules Verne, Les Cinq Cent Millions de la Bégum), Industria-City (Didier de Chousy, Ignis), la Morticolie (Léon Daudet, Les Morticoles), la Pingouinie (Anatole France, L’Île des Pingouins), la Siturgic (Claude Farrère, Les Condamnés à mort), Kentropol (Henri Allorge, Le Grand Cataclysme), la Panachie (Régis Messac, La Cité des asphyxiés), la Crétinie (Régis Messac, Valcrétin). Ces entités topographiques font l’objet de descriptions précises et détaillées, qui ancrent une organisation urbaine imaginaire dans un cadre narratif réaliste. L’architecture de la ville et l’infrastructure de l’habitat participent directement à l’élaboration de ces mondes alternatifs où il ne fait pas toujours bon vivre, depuis les aléas de l’application du programme hygiéniste de la « cité du bien-être » (Verne) jusqu’au monde souterrain inversé, alimenté par les déjections des classes inférieures (Messac). Toutes ces villes ont en commun de faire face à des tensions internes (révolte d’hommes-robots dans Industria-City et d’ouvriers dans la Siturgic, rationnement des ressources en Panachie, cruauté des habitants de Morticolie, dégénérescence des autochtones de Crétinie, explosions terroristes en Pingouinie) et à des menaces extérieures à l’origine de réorganisations géopolitiques qui placent les cités en rivales et ennemies (France-Ville attaquée par Stahlstadt, Kentropol en guerre contre Hérakloupol). Une étude de la poétique des infrastructures urbaines imaginées dans le roman dystopique français permet de préciser cette tension entre un élan réformiste vers le confort, l’efficacité et l’hygiène, et le constat d’une faible résistance aux obstacles fragilisant la ville comme entité humaine et matérielle. Les configurations de l’habitat, l’innovation des transports en commun et le fonctionnalisme du décorum domestique affichent simultanément leur efficacité et leur fragilité. Pour en rendre compte, deux aspects de la poétique urbaine du roman dystopique seront examinés. D’une part, l’intertextualité – explicite ou allusive – avec le discours architectural qui fonde l’agencement et la répartition des composantes de la ville (Le Corbusier cité dans Ravage de Barjavel, par exemple). D’autre part, le jeu de miroir entre les morphologies humaines, les valeurs sociales et les fonctions assignées aux bâtiments : symétrie synonyme d’intransigeance bornée et impitoyable (Daudet, Les Morticoles), répertoire littéraire urbain (Flaubert Street, Rosetti Park et Proust Avenue sur l’Île des Articoles d’André Maurois), interpénétration tératologique du corps à l’infrastructure (Xavier de Langlais, L’Île sous cloche). [less ▲]

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See detailWestern lowland gorilla in a logging concession: comparison of density and nesting behavior before and after logging
Haurez, Barbara ULg; Petre, Charles-Albert ULg; Doucet, Jean-Louis ULg

Conference (2014, May 22)

Timber exploitation is rapidly expanding throughout the Congo Basin. In Gabon, timber industry is currently the second working sector and logging concessions cover 45% of the country forest area, largely ... [more ▼]

Timber exploitation is rapidly expanding throughout the Congo Basin. In Gabon, timber industry is currently the second working sector and logging concessions cover 45% of the country forest area, largely overlapping with the range of western lowland gorilla (Gorilla gorilla gorilla WLG). Logging may negatively impact gorilla because of an increase in hunting pressure linked to human concentration and easier access to forest. On the other hand, WLG might benefit from forest opening and the associated growth in Terrestrial Herbaceous Vegetation, following timber felling and roads/trails implementation. In the present study, gorilla density and nesting behavior were studied in a 617,000-ha logging concession located in Central Gabon. A Standing Crop Nest Count census was realized 25 years after the first timber harvesting cycle, consisting in the assessment of the potentiality of logged forest to hold viable WLG populations. A second census was undertaken four to six months after the second logging wave. Comparing nesting behavior and estimated gorilla density between the two census allows to highlight the short-term effects of logging on gorilla populations. A relatively high WLG density was observed during the first census (2.1 weaned gorillas/km²). This figure dropped down to 1.0 weaned gorillas/km² after the second felling cycle. Both density values fall within the range of documented WLG densities documented at other sites. Gorillas consistently nested preferentially in open terra firme forest and built the majority of their nests using herbs of the Marantaceae and Zingiberaceae families. Both these observations underline the importance of Terrestrial Herbaceous Vegetation for nesting. The results of this study suggest that timber exploitation and WLG conservation are not mutually exclusive. The initial high density might traduce an effective anti-poaching strategy for now. The decline in gorilla density observed directly in the second census is probably linked with the avoidance of the disturbance of logging operations. Monitoring the evolution of WLG density would be important in order to control if the figure will rise over time to reach its initial value, but also to assess if a positive effect of Terrestrial Herbaceous Vegetation growth will be observed. [less ▲]

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See detailDetection of non concave and non increasing multifractal spectra using wavelet leaders (Part I)
Esser, Céline ULg; Kleyntssens, Thomas ULg; Bastin, Françoise ULg et al

Conference (2014, May 22)

Multifractal analysis is concerned with the study of very irregular signals. For such functions, the pointwise regularity may change widely from a point to another. Therefore, it is more interesting to ... [more ▼]

Multifractal analysis is concerned with the study of very irregular signals. For such functions, the pointwise regularity may change widely from a point to another. Therefore, it is more interesting to determine the spectrum of singularities of the signal, which is the Hausdor ff dimension of the set of points which have the same H ölder exponent. For real-life signals, the computation of the spectrum of singularities from its de finition is not feasible. Multifractal formalisms are used to approximate this spectrum. Currently, there exist several methods. In this talk, we present a new multifractal formalism based on the wavelet leaders of a signal which allows to detect non concave and non increasing spectra. [less ▲]

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See detailDetection of non concave and non increasing multifractal spectra using wavelet leaders (Part II)
Kleyntssens, Thomas ULg; Esser, Céline ULg; Nicolay, Samuel ULg

Conference (2014, May 22)

This talk follows "Detection of non concave and non increasing multifractal spectra using wavelet leaders (Part I)" given by Céline Esser. A multifractal formalism is a numerically computable formula that ... [more ▼]

This talk follows "Detection of non concave and non increasing multifractal spectra using wavelet leaders (Part I)" given by Céline Esser. A multifractal formalism is a numerically computable formula that approximates the spectrum of singularities of a function. A new multifractal formalism based on the wavelet leaders is presented as well as a comparison with other formalisms. Its main advantages are that it allows to detect non concave and non increasing spectra. An implementation is proposed. [less ▲]

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See detailApplications des microalgues
Franck, Fabrice ULg; Remacle, Claire ULg

Conference (2014, May 22)

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See detailMultifractal analysis of air temperature signals using the wavelet leaders method
Deliège, Adrien ULg; Nicolay, Samuel ULg

Conference (2014, May 22)

We use the discrete "wavelet transform microscope" to show that the surface air temperature signals of weather stations selected in Europe are monofractal. This study reveals that the information obtained ... [more ▼]

We use the discrete "wavelet transform microscope" to show that the surface air temperature signals of weather stations selected in Europe are monofractal. This study reveals that the information obtained in this way are richer than previous works studying long range correlations in meteorological stations. The approach presented here allows to bind the Hölder exponents with the climate variability. We also establish that such a link does not exist with methods previously carried out, such as the detrended fluctuation analysis. [less ▲]

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See detailQuand une recherche en didactique de l’architecture ambitionne d’alimenter d’une part, une réflexion méthodologique facultaire et, d’autre part, le service à la communauté, voire à la société.
Scheffers, Patricia ULg

Conference (2014, May 22)

Qu’il s’agisse de la directive européenne de 1985 (CE, 1985), du décret « Bologne » (GCFB, 2004) ou du Décret « Paysage » en Communauté Française de Belgique (GCFB, 2013), les textes régissant ... [more ▼]

Qu’il s’agisse de la directive européenne de 1985 (CE, 1985), du décret « Bologne » (GCFB, 2004) ou du Décret « Paysage » en Communauté Française de Belgique (GCFB, 2013), les textes régissant l’enseignement de l’architecture nous exhortent d’ « accompagner les étudiants dans leur rôle de citoyens responsables, capables de contribuer au développement d’une société démocratique, pluraliste et solidaire ». Dix années de travail au sein de bureaux et dix-sept années d’enseignement ont conforté une conscience toujours grandissante des enjeux sociétaux liés à l’exercice de la profession. Ainsi la volonté de participer activement à la formation d’ « architectes-praticiens-réflexifs (Schön, 1987) acteurs d’une société en perpétuelle mutation » s’est matérialisée, fin 2012, par un projet de recherche en didactique de l’architecture. La problématique se situe dans le contexte de la formation initiale des architectes. Elle survient temporellement dans la continuité de la rédaction d'un référentiel facultaire de compétences (Tardif, Fortier, & Préfontaine, 2006). Elle vise la compréhension fine des mécanismes à l’œuvre dans le développement d'une des compétences ciblées : « Instruire une question architecturale • en ayant conscience des enjeux sociétaux contemporains inscrits dans l'Histoire • en faisant preuve de posture réflexive, d’ouverture, d'initiative» Au travers de cette compétence, l’ambition est d’aider les étudiants à construire, non seulement des aptitudes professionnelles, mais, surtout de les encourager à développer des valeurs humanistes et une conscience citoyenne (Rogers, 1984). Elle est de ce point de vue le plus emblématique du référentiel. Quels sont les lieux de développement de la compétence ? Quels mécanismes sous-jacents sont à l’œuvre ? Quels sont les niveaux de développement identifiables au cours du 1er cycle ? Existent-ils des manifestations de transfert au-delà des situations de cours ? Recherche, enseignement et service à la société se retrouvent ainsi intimement liés dans la recherche d’un nouveau centre de gravité… [less ▲]

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Peer Reviewed
See detailPersistence of decomposition odour in soil analysed by GC×GC-TOFMS
Perreault, K; Stefanuto, Pierre-Hugues ULg; Stuart, B et al

Conference (2014, May 22)

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See detailA multi-step process for an alternative wheat bran biorefinery
Aguedo, Mario ULg; Fougnies, Christian; Richel, Aurore ULg

Poster (2014, May 21)

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See detailBioactive Intraocular Lens - A Strategy to Control Secondary Cataract
Huang, Yi-Shiang ULg

Poster (2014, May 21)

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See detailL’apprentissage de résolution de problèmes complexes (ARP - C) : un dispositif d’entrainement au travail interdisciplinaire
Maillart, Christelle ULg; Leclercq, Anne-Lise ULg; Lejeune, Caroline ULg et al

Conference (2014, May 21)

Les futurs logopèdes et futurs psychologues doivent apprendre à s’intégrer dans une prise en charge multidisciplinaire, à interagir efficacement avec d’autres professionnels, et à comprendre les limites ... [more ▼]

Les futurs logopèdes et futurs psychologues doivent apprendre à s’intégrer dans une prise en charge multidisciplinaire, à interagir efficacement avec d’autres professionnels, et à comprendre les limites de leur champ d’intervention. Pour entrainer ces apprentissages critiques, un dispositif interdisciplinaire a été proposé à 36 étudiants en logopédie et 14 étudiants en psychologie, tous en cinquième année de leur formation initiale à l’Université de Liège. Ces étudiants ont été confrontés à une vignette clinique dont la complexité justife le recours à divers intervenants. Cette vignette a été, dans un premier temps, analysé en petits groupes disciplinaires avec l’aide d’un tuteur (4 groupes en logopédie et 2 groupes en neuropsychologie). Ensuite, des groupes interdisciplinaires (composés de logopèdes et de neuropsychologues) ont été formés pour partager leurs analyses et avancer dans la formulation du diagnostic. Enfin, les étudiants ont eu l’occasion de rencontrer des professionnels d’autres disciplines (instituteur, psycho-pédagogue, etc.) avec lesquels ils ont du discuter des questions en suspens liées à la vignette analysée. L’évaluation du dispositif suggère que globalement les étudiants ont le sentiment d’avoir progressé quant à la maitrise de certains apprentissages critiques. Plus de 90% des étudiants relatent avoir progressé en évaluation pluridisciplinaire et différents indices indiquent qu’ils perçoivent l’intérêt de recourir à un réseau de professionnels. Par ailleurs, la perception du dispositif peut être différente selon les disciplines. Ainsi, 90% des psychologues mais seulement 60% des logopèdes estiment avoir progressé dans la prise de décisions argumentées par rapport à l’évaluation. Inversement, 30% des psychologues mais plus de 70% des logopèdes relatent des progrès pour la capacité à prioriser les recommandations thérapeutiques. Ces résultats seront analysés et discutés. [less ▲]

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See detailWhat Do Lawyers Do With Science? - A View from Consumer Protection on Psychology and Neuroscience
Sibony, Anne-Lise ULg

Conference (2014, May 21)

In this conference adressed to students and researchers in Neurosciences, I will present a legal perspective on some uses of neurosciences for marketing purposes. Legal, technical and ethical questions ... [more ▼]

In this conference adressed to students and researchers in Neurosciences, I will present a legal perspective on some uses of neurosciences for marketing purposes. Legal, technical and ethical questions will be articulated. I will further present some thoughts on legal use of scientific insights on human behaviour. [less ▲]

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See detailTrappist Beers: Exploring the Cloak of Secrecy by GC×GC-TOFMS
Allen, C; Loughnane, C; Stefanuto, Pierre-Hugues ULg et al

Poster (2014, May 21)

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See detailMeasurement of Trace levle Dechlorane Flame Retardants in Food and Feed by GC-MS/MS
L'Homme, Benjamin ULg; Calaprice, C; Brasseur, Catherine ULg et al

Poster (2014, May 21)

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See detailStrategies to combine novel traits across countries: example of heat stress
Hammami, Hedi ULg; Vandenplas, Jérémie ULg; Carabaño, Maria Jesus et al

Conference (2014, May 21)

Nowadays, novel traits are of great interest. However, phenotypes are siloed and mainly not shared. Heat stress is becoming problematic affecting animals’ performances and their well-being. Heat stress ... [more ▼]

Nowadays, novel traits are of great interest. However, phenotypes are siloed and mainly not shared. Heat stress is becoming problematic affecting animals’ performances and their well-being. Heat stress tolerance as a novel trait is only addressed by isolated within-country research studies. Integration and combination of local and foreign information sources is needed for better accuracy genetic evaluations. Therefore, this study was aimed to test the potential combination of sources of external information towards the evaluation of heat stress tolerance of dairy cattle. Long-term cow performances linked to environmental descriptors (weather parameters as proxy to climate change) collected over 10 years under the temperate conditions of the Walloon Region of Belgium and the hotter and warm Mediterranean conditions of Andalusia and Castile-La-Mancha Spanish regions were available. A total of 1,604,775 milk, fat, and protein test-day (TD) records linked to average daily temperature humidity (THI) values for 3-day lag before each TD were considered. Under a first strategy considering free-access to raw-data (phenotype and pedigree), a joint evaluation was firstly run using reaction norm models where production traits were considered as function of THI. A Belgian and a Spanish evaluation were also run using the same model. An alternative strategy considering only access to external information (i.e. regression coefficients for additive genetic effects (â and their associated REL)) was tested. In this case, foreign â and their REL resulting from the Spanish evaluation were first converted to the Belgian trait and thereafter integrated in the Belgian evaluation using a Bayesian approach. Rank correlations between regression coefficients, â (of the 1,104 bulls having daughters only in Spain) estimated by Belgian evaluation and â estimated by the joint evaluation were moderate (<=0.70). Corresponding rank correlations between â estimated by joint and Bayesian evaluations were significantly higher (ranging from 0.967 to 0.998), indicating that the Bayesian evaluation integrating external information was in good concordance with the joint evaluation. Results from this study indicated that the integration of external information via the Bayesian approach has a good potential to improve the genetic evaluation of sparse and siloed novel traits. [less ▲]

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See detailCan Brand Engagement Be Built through the Brand Communication Style? The Role of Anthropomorphism.
Gretry, Anaïs ULg; Horváth, Csilla; Van Riel, Allard

Conference (2014, May 21)

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See detailLong term spatial and temporal variability in catches of common spiny lobster Palinurus elephas (Fabricius, 1787) in Corsica (NW Mediterranean): fisheries trends, biological trends or both?
Pere, Anthony; Astrou, Adèle; Patrissi, Michela et al

Conference (2014, May 20)

The small-scale fishing fleet of Corsica (France, NW Mediterranean) is mostly composed of small artisanal boats. The common spiny lobster, Palinurus elephas, is the most valuable of all caught species. As ... [more ▼]

The small-scale fishing fleet of Corsica (France, NW Mediterranean) is mostly composed of small artisanal boats. The common spiny lobster, Palinurus elephas, is the most valuable of all caught species. As a result, it is the main target of most fishermen during the 7-months fishing season. Populations of this species seem to decrease since the 1950's. The aim of this study was to understand if this decline could be linked with overfishing, or if other biological, ecological or climatic factors could explain this population drop. To achieve this goal, we combined 1) a meta-analysis of all data concerning fishing effort and captures in published and grey literature and 2) an on-board monitoring program that started in 2004. Using obtained data, we followed fleet structure, fishing effort and captures evolution from 1950 to 2011. Our results point out an important capture decrease during the 20th century. This trend started during the 1950’s and 1960’s, when trammel nets replaced traditional wood traps. A micro-regional analysis revealed that exploitation intensity widely varied among different areas around the island. Moreover, landings and catch rates showed important spatial and temporal variations. This could be caused by changes in recruitment rates. However, recruitment processes of this species are still poorly understood. Improving our knowledge of common spiny lobster life cycle will likely lead to a more comprehensive and efficient assessment of Corsican stocks of this species. [less ▲]

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See detailLearning by doing. Policy analysis through focus groups investigation in bachelor curriculum
Fallon, Catherine ULg

Conference (2014, May 20)

À l’Université de Liège, les étudiants de deuxième année de baccalauréat en science politique sont invités depuis quelques années à réaliser un exercice de focus group dans le cadre du cours de ... [more ▼]

À l’Université de Liège, les étudiants de deuxième année de baccalauréat en science politique sont invités depuis quelques années à réaliser un exercice de focus group dans le cadre du cours de méthodologie qualitative. C’est l’accumulation de matériaux – travaux écrits des étudiants, observation des focus groups par les évaluateurs de l’exercice, procès verbaux des réunions entre étudiants, courriels échangés avec le personnel scientifique et académique, éléments d’autocritique rétrospective des étudiants issus de leur rapport d’analyse – qui fait l’objet de ce chapitre. Par conséquent, s’il est certes question de montrer l’intérêt que représente la mobilisation de la technique des groupes focalisés, ce chapitre est surtout l’occasion de mettre plus particulièrement en évidence . les apports d’un tel outil dans le cadre d’un cursus universitaire à destination des étudiants en science politique. Dans ce cadre et dans un souci d’illustration, il sera régulièrement ponctué d’extraits issus des rapports d’analyse d’étudiants. D’une manière générale, la réalisation d’entretiens de groupe comporte quelques difficultés qui rendent l’apprentissage de l’étudiant d’autant plus intéressant qu’il comporte une dimension quasi ludique. Elle reste une épreuve enrichissante non seulement par la conduite de la discussion, la dynamique de groupe qu’elle génère et l’analyse dont elle fait l’objet, mais également par l’organisation et la coordination que requiert sa mise en place. [less ▲]

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See detailHigh throughput sequencing of aphid haemolymph reveals endosymbiont diversity
De Clerck, Caroline ULg; Leonard, Simon; Joncour, Pauline et al

Conference (2014, May 20)

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