References of "Scientific congresses and symposiums"
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See detailPast mining areas as rural capital – Perspectives from Bucovina and Wallonia
Schmitz, Serge ULiege; Dubois, Charline ULiege; Vanderheyden, Vincent ULiege et al

Conference (2017, September)

In this paper, we consider old mining sites in two very different contexts, a post-socialist Carpathians area and a Western European area that knew precocious industrialisation. How these past mining ... [more ▼]

In this paper, we consider old mining sites in two very different contexts, a post-socialist Carpathians area and a Western European area that knew precocious industrialisation. How these past mining areas could develop and enhance rural development and heritage landscapes? [less ▲]

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See detailEmerging methods using ultrasound for detection of soft tissue musculoskeletal disease
Busoni, Valeria ULiege

in BEVA Proceedings (2017, September)

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See detailVisco-plastic Chaboche model for nickel-based alloys under anisothermal cyclic loading
Morch, Hélène ULiege; Duchene, Laurent ULiege; Habraken, Anne ULiege

in Proceedings of the XIV International Conference on Computational Plasticity (2017, September)

The mechanical behavior of visco-plastic materials such as nickel-based alloys is highly dependent on temperature. Some characteristics such as viscosity, hardening, static recovery, dynamic recovery have ... [more ▼]

The mechanical behavior of visco-plastic materials such as nickel-based alloys is highly dependent on temperature. Some characteristics such as viscosity, hardening, static recovery, dynamic recovery have more or less influence on the overall behavior depending on the considered temperature. The unified constitutive model developed by Chaboche [1] is very efficient in representing this complexity as it is very adaptable and can contain many features. A basic Chaboche model contains a viscosity law and one or several hardening equations. Within these hardening equations, it is possible to add several features that will represent the complex behavior of the material. The aim of this study is to understand the role of the different parameters and the influence of the different features in an advanced Chaboche model adapted to cyclic anisothermal loading. This specific model was also developed in [2],[3]. However, part of this study is based on particular cases where different features of the model are analyzed [4]–[6]. [less ▲]

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See detailBeam-to-column joints, column bases and joint components under impact loading
Demonceau, Jean-François ULiege; Vanvinckenroye, Hélène ULiege; D'Antimo, Marina ULiege et al

in Proceeding of Eurosteel 2017 conference (2017, September)

Recent events such as natural catastrophes or terrorist attacks have highlighted the necessity to ensure the structural integrity of buildings under exceptional events. For more than 10 years, the ... [more ▼]

Recent events such as natural catastrophes or terrorist attacks have highlighted the necessity to ensure the structural integrity of buildings under exceptional events. For more than 10 years, the University of Liege is strongly involved in researches on the response of structures further to such exceptional events through participations to national or European research projects. In particular, the University of Liege has contributed very recently to a European research project entitled ROBUSTIMPACT investigating the behaviour of steel or steel-concrete composite building structures subjected to impact loading and proposing simplified procedures to predict the response of such structures under the considered scenario. As a contribution to this research project, an experimental test campaign was realised in Liège; the objective was to study the behaviour of beam-to-column joints, of column bases and of most of their constitutive components under impact loading and, in particular, to highlight the influence of the strain rate effects on the response of the studied joints and components. The proposed paper first describes the conducted test campaign with all the required details about the tested specimens and the testing setup; then the analysis of the so-obtained experimental results is presented. Finally authors’ views on how to account for the strain rate effects in analytical approaches for joint design is briefly expressed. [less ▲]

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See detailInfluence of beam-to-column joints on the robustness of earthquake-resistant moment-resistant frames
Francavilla, Antonella; Latour, Massimo; Rizzano, Gianvittorio et al

in Proceeding of Eurosteel 2017 conference (2017, September)

Robustness of Moment Resistant Frames (MRFs) designed according to current seismic codes and subjected to a loss-of-column scenario is strictly linked to the deformation capacity of beam-to-column ... [more ▼]

Robustness of Moment Resistant Frames (MRFs) designed according to current seismic codes and subjected to a loss-of-column scenario is strictly linked to the deformation capacity of beam-to-column connections, which are usually subjected to combined axial and bending loads. In the seismic design of steel frames, once avoided the yielding of columns, a global dissipative collapse mechanism has to be ensured by imposing the formation of plastic hinges at the ends of the beams or in the connections and guarantying, provided that the elements involved in plastic range have an adequate energy dissipation capacity. Within this framework, the aim of this paper is to analyse the influence of the response of the connections designed for seismic application on the global behaviour of MRFs under a loss-of-column scenario providing an accurate modelling of connections subjected to combined axial and bending loads. To this scope four different beam-to-column joints designed for seismic actions, previously tested under cyclic load history at the STRENGTH laboratory of Salerno University, have been modelled and introduced in a case-study structure, whose response has been assessed by means of push-down analyses. The performances of the analysed frames have been analysed and is compared using the Residual Reserve Strength Ratio (RRSR) index combined with the energy balance method. [less ▲]

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See detailisokinetic profile of subjects with proximal patellar tendinopathy
Croisier, Jean-Louis ULiege; Libertiaux, Vincent ULiege; Kaux, Jean-François ULiege

in European Journal of Sports Medicine (2017, September), 5(Supplement 1), 65-66

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See detailManaging the urban colour: similarities and differences between European and Asian strategies
Nguyen, Ngoc Luan ULiege; Teller, Jacques ULiege

in IUFRO 8.01.02 Landscape Ecology Conference 2017 - The Green-Blue Nexus: Forests, Landscapes and Services - Book of Abstracts (2017, September)

The information we receive from the urban landscape is triggered and defined by the sense of sight, in other words by visual sensations. Colour is a fundamental component of the visual sensations: it ... [more ▼]

The information we receive from the urban landscape is triggered and defined by the sense of sight, in other words by visual sensations. Colour is a fundamental component of the visual sensations: it allows us to identify objects with the contrasts that defines the form and it helps to structure the urban environment. As an attribute of the urban morphology, colour informs us about the status and history of a place, through relations of integration, dominance, fragmentation, homogeneity or heterogeneity that can be observed between its built components. Moreover, additionally to functional roles, colour can promote heritage values through a collective identity and besides marking our eyesight out with signals, colour makes sense in our visual environment, through a semantic function. Public authorities are aware of the impact of colour as a factor that can influence the image and attractiveness of cities, and in many European countries the principles of territorial governance seek the valorization of specific and local colour palettes which are considered to belong to the cultural heritage of the city or the region. In this regulatory perspective, several municipalities in Europe use chromatic charts as guidance tools in order to preserve the dominant local tones. The main purpose in a colour regulation is most of the time to harmonize buildings in a territorial area. This need for harmonization, standardization, which is equivalent to morphological consistency for many, is often considered to be essential for maintaining the urban townscape character. Thus in China, the concept of "urban colour" is becoming increasingly important in the field of planning to make an elegant urban environment. In the context of rapid economic growth of the country, many Chinese cities, mostly located in the eastern part of the country, conduct research and implement specific tools such as urban colour plans. These tools allow to continue the urban colour context, in a way of historical heritage based on the dominant colour, essentially to control and guide the development of new construction zones. The aim of this paper is to highlight the main similarities and differences between the European and the Asian politics concerning the management of the urban colour: although they developed on the same theorical base (specifically the “Geography of Colour” founded by Lenclos), they diverge from the point of view of purpose. The European approach is focused on the preservation and maintenance of the morphological specificities of urban tissues in terms of local colours, while in China, where built heritage tends to disappear in the urban regeneration under the real estate pressure, tools for the colour management are used mostly for the construction of new cities in order to keep the spatial coherence. The paper is illustrated with several European and Asian examples of concrete cases from both scientific and professional publications. [less ▲]

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See detailAdministration of mesenchymal stromal cells before renal ischemia/reperfusion attenuates kidney injury and modulates renal lipid metabolism in rats
ERPICUM, Pauline ULiege; Rowart, Pascal ULiege; POMA, Laurence ULiege et al

in Transplant International (2017, September), 30(S2), 9004

Background: Mesenchymal stromal cells (MSC) have been demonstrated to attenuate renal ischemia/reperfusion (I/R) damage in rodents. The mecha- nisms of such nephroprotection remain unclear. Materials and ... [more ▼]

Background: Mesenchymal stromal cells (MSC) have been demonstrated to attenuate renal ischemia/reperfusion (I/R) damage in rodents. The mecha- nisms of such nephroprotection remain unclear. Materials and Methods: Male Lewis rats aged of 8–10 weeks received tail i.v injection of 1.5x106 MSC in 1 mL saline (MSCD-7, n = 11) or saline alone (SD- 7, n = 6) 7 days before renal I/R. Left renal ischemia (by clamping the renal pedicle) lasted 45 min. Right nephrectomy was simultaneously performed. Blood sample was collected from inferior vena cava 48 h post reperfusion. Renal function was assessed by measuring serum creatinine (SCr) levels. Expressions of inflammatory and apoptotic markers by real-time (RT)-qPCR were comparatively quantified. High-throughput RNA sequencing was applied to MSCD-7 vs. SD-7 non-ischemic right kidneys. Relevant pathways were detected using an Over-Representation Analysis with WebGestalt, and confirmed by RT-qPCR. Results: Scr levels reached 1.4 ` 0.7 vs. 2.4 ` 0.8 mg/dL in MSCD-7 vs. SD-7 group (p < 0.05). MSC infusion significantly reduced mRNA expression of Casp3, Hsp 70, Kim-1, Mcp-1 and Il-6 and increased mRNA expression of Bcl compared to saline. Among 25 908 genes, 748 were identified as significantly differentially expressed (False Discovery Rate (FDR), <0.05) between MSCD-7 and SD-7 non-ischemic kidneys. Among the most affected metabolic pathways, renal lipid metabolism was significantly altered, with down-regulation of fatty acid biosynthesis and an up-regulation of PPARa pathway in MSCD-7 vs. SD-7 groups. By immunoblotting, PPARa and phosphorylated-PPARa were significantly increased in MSCD-7 vs. SD-7 kidneys, in both non-ischemic and ischemic conditions. Moreover, levels of malondialdehyde-derived lipid peroxidation products were decreased in MSCD-7 ischemic kidneys in comparison to SD-7 ischemic kidneys. Conclusion: MSC infusion at day 7 prior injury critically impacts renal lipid metabolism, which may condition kidney parenchyma against I/R. [less ▲]

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See detailPhysical activity counseling: Creation of a formation for students in physical education
Lombard, Gilles ULiege; Jansen, Adrien ULiege; Cloes, Marc ULiege

Conference (2017, September)

The WHO (2015) estimates to 1 million deaths par year due to physical inactivity in Europe. The promotion of children physical activity is the starting point as active children are more likely to remain ... [more ▼]

The WHO (2015) estimates to 1 million deaths par year due to physical inactivity in Europe. The promotion of children physical activity is the starting point as active children are more likely to remain active in adulthood than the others (ACSM et al., 2015). According to ecological model (Booth, 2001) school and teachers are essentials determinants to encourage children in this way. Then, we decided to implement a unit aiming to train physical education students to be able to counselling children and sedentary people. The first step was to interview 15 field professionals supposed to be involved in physical activity promotion in order to identify the essential factors to point out. The second step was to design a formation plan allowing to fill gaps in students skills. The last point will be to implement this formation and to analyse the impact on students actions. [less ▲]

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See detailUn "âge d'or" touche-t-il à sa fin? Histoire, adaptations et reconfigurations dans le champ du Blanc-Bleu Belge en Wallonie aujourd'hui (1980-2015)
Gérard, Marie ULiege

Conference (2017, September)

Contribuer à une réflexion qui envisage autrement l’entreprise de « modernisation agricole » du XXe siècle en Europe occidentale implique une triple opération. Afin d’inscrire cette entreprise dans ... [more ▼]

Contribuer à une réflexion qui envisage autrement l’entreprise de « modernisation agricole » du XXe siècle en Europe occidentale implique une triple opération. Afin d’inscrire cette entreprise dans l’histoire plus générale des développements et des reconfigurations du capitalisme, il importe d’abord de la faire remonter à la révolution industrielle du XVIIIe siècle (et non aux « Trente Glorieuses », simple accélération, certes prodigieuse, de ce qui, dans les campagnes et ailleurs, se joue déjà depuis un siècle). Il faut ensuite montrer que cette histoire, loin d’être naturelle et nécessaire, a au contraire engendré, non seulement de la souffrance, mais également des résistances ainsi que des revendications organisées. Troisièmement, il est essentiel de montrer que l’histoire de la modernisation agricole n’est pas achevée ; aussi importe-t-il de prendre le contrepied des chantres de la « modernité réflexive », accompagnement idéologique du « capitalisme vert ». C’est ce projet critique que notre communication alimentera sur la base d’une enquête de terrain : l’élevage de la très controversée race bovine blanc-bleu belge qui, à l’heure actuelle, constitue toujours la première spéculation des éleveurs allaitants en Wallonie. Nous proposerons une analyse en quatre temps qui s’inscrit dans la droite ligne de ce colloque (plus particulièrement dans son troisième volet). Dans un premier temps, nous montrerons que l’histoire de cette race d’élevage est intéressante en ce qu’elle rejoue d’une manière singulière l’histoire dominante de la modernisation agricole. En nous appuyant sur les récits des éleveurs de « BBB », il apparaîtra que ce qu’ils appellent « l’âge d’or » – soit la tournure particulière que prend en Wallonie la modernisation agricole de l’après-guerre en s’organisant, dans le champ de l’élevage allaitant, autour d’une race hyper-conformée connue pour ses césariennes obligatoires ainsi que pour la qualité de sa viande diététique – ne coïncide pas, ainsi qu’on l’attendrait, avec la période dite des « Trente Glorieuses », mais bien avec les très néolibérales années 1980. Second point. Dans les années 1970, un tournant s’amorce dans le monde agricole occidental : sur fond d’une critique du « productivisme », celui-ci consacre simultanément le durcissement de la logique modernisatrice et l’institutionnalisation « d’alternatives » à ce modèle dominant ; or – et c’est une seconde singularité de ce cas –, pour les éleveurs de « BBB », cet embranchement semble être devenu effectif seulement depuis les années 2000. C’est ce qu’ils racontent tous : ils sont désormais sommés de choisir ; soit s’engager toujours plus avant dans la logique de modernisation, soit opter pour des « alternatives ». Mais tout indique, on le verra, que la race « BBB » n’est adaptée à aucune de ces deux trajectoires. Nous montrerons alors qu’un tel « verrouillage » de la race blanc-bleu belge n’est pas seulement d’ordre technique, mais également socio-psychique. Certes, des reconfigurations sont encore possibles ; mais pas pour tous. Certains éleveurs, parce qu’ils sont attachés à une race d’élevage, c’està-dire aussi à une certaine structure de l’exploitation agricole impliquant un certain rapport au monde, à la nature, aux autres et à soi-même, ne peuvent entamer les reconfigurations qui s’imposent. Nous mettrons en évidence le malaise qui habite certains de ces « paysans modernisés », ceux qui perdent aujourd’hui la compétition dont, hier, ils étaient sortis victorieux. Nous conclurons sur ce sentiment de malaise et, surtout, sur la critique qu’il implique de « l’environnement » et du « bien-être animal » (nouveaux mots d’ordre éthiques de la « modernité réflexive »). Il est clair en effet que cette société « réflexive », en prenant pour cible les pratiques d’élevage intensives du blanc-bleu belge (cf. : l’article du journal Le Monde), ne fait finalement que construire des boucs émissaires, lesquels répondent à une fonction précise : se convaincre que l’ère de l’environnement est aujourd’hui advenue et, par-là, oublier que sans s’arcbouter à une critique politique radicale, l’éthique environnementale ne peut qu’accélérer la propagation du capitalisme. [less ▲]

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See detailPedagogical and didactic adaptations of a mathematics course to a student-centred education in an architecture programme
Jancart, Sylvie ULiege; Seijkens, Nicolas ULiege; Silvestre, Aude ULiege

Conference (2017, September)

This presentation will focus on both didactic and pedagogical reflections teaching mathematics in architecture programme in order to support the experience and learning of first year students. Led in ... [more ▼]

This presentation will focus on both didactic and pedagogical reflections teaching mathematics in architecture programme in order to support the experience and learning of first year students. Led in order to promote the students’ intrinsic motivation (Deci & Ryan, 1985) and support our didactic reflections, an inventory of mathematical difficulties encountered by freshmen in their program has been established. This inventory also served the purpose of demystifying mathematics and valuing them through a place in a cursus more rooted in the profession (Wigfield and Eccles, 2000). Sorted according to the skills involved, the relevant difficulties pointed out by students were mostly found in two courses, topography and structure. Several examples will be presented demonstrating the lack of transfer between the disciplines, students studying formulas without understanding them. To counter this lack of transfer, pedagogical reflections about our current teaching were developed thanks to the Feedback First-Year Project (FFYP) developed in the University of Liège. In this context, three significant devices set up in mathematics were developed. The first one is an online-oriented prerequisite test implemented on our academic online platform. The second one is an intermediate test based on true/false quizzes and the third one a simulation of the real exam with peer interventions. According to Nicol’s recommendations (2009), each of these features is completed with specific feedbacks specially designed in order to impact several dimensions of their motivation. [less ▲]

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See detailUp-scalable spray-drying synthesis of Na2Ti3O7
Piffet, Caroline ULiege; Vertruyen, Bénédicte ULiege; Mahmoud, Abdelfattah ULiege et al

Poster (2017, September)

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See detailNumerical analysis of the fire resistance of high-strength steel circular columns
Tondini, Nicolas; Demonceau, Jean-François ULiege

in Proceeding of Eurosteel 2017 conference (2017, September)

High strength steels (HSS) have specific chemical compositions, which primarily depend on rolling tempering techniques, element thickness and the producer. Nonetheless, EN1993-1-12 related to HSS up to ... [more ▼]

High strength steels (HSS) have specific chemical compositions, which primarily depend on rolling tempering techniques, element thickness and the producer. Nonetheless, EN1993-1-12 related to HSS up to S700 grade does not provide any additional note on the design of steel structures subjected to fire and the designer is referred to EN1993-1-2 valid up to S460 grade. This paper presents the results of a numerical analysis on the behaviour at elevated temperature of Circular Hollow Sections (CHS) columns made of HSS. In details, three full-scale HSS CHS columns with average measured yield strength of 822 MPa and 3.15 m long were tested under the standard ISO fire with constant eccentric compression load. Two members were made of a cross section 323.9 mm x 10 mm and one of a cross section 355.6 mm x 12 mm. The constant applied loads during the tests were respectively equal to 10%, 14% and 19% of the axial capacity of the columns at ambient temperature. Then, a nonlinear thermomechanical finite element model made of solid elements was developed by means of ABAQUS. A fully-coupled analysis using Geometrically and Materially Nonlinear Imperfect Analysis (GMNIA) was employed meaning that the temperature field was determined together with the stress-displacement fields. The calibration of the numerical model was carried out against experimental data by exploiting the thermal and the mechanical properties of steel provided in EN1993-1-2. A sensitivity analysis was performed to highlight the main parameters that affect the simulation results, i.e. mesh size, residual stresses, geometrical imperfections etc. The calibration process showed a good agreement between the numerical results and the experimental outcomes both in terms of failure temperature and of failure mode. With the calibrated model, it was finally possible to perform a preliminary parametric analysis by varying the applied load and the column relative slenderness to assess the appropriateness of the buckling curve included in EN1993 -1-2 to predict the fire resistance of HSS CHS columns. [less ▲]

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See detailDefeatist performance beliefs in a sample of individuals with persistent negative symptoms
Thonon, Bénédicte ULiege; Li, Xueying; Velligan, Dawn

Poster (2017, September)

Objective Negative symptoms of schizophrenia, in particular motivational deficits, have showed to be linked to dysfunctional attitudes, such as defeatist performance beliefs. This relationship has been ... [more ▼]

Objective Negative symptoms of schizophrenia, in particular motivational deficits, have showed to be linked to dysfunctional attitudes, such as defeatist performance beliefs. This relationship has been found in various types of samples but has not been investigated in samples of individuals presenting persistent negative symptoms (PNS). The present study aimed to assess the relationship between defeatist performance beliefs and negative symptoms in a sample of individuals diagnosed with schizophrenia and PNS. Another objective was to evaluate the link between change in defeatist beliefs and change in negative symptoms, before and after psychosocial intervention. Methods Fifty-one participants diagnosed with schizophrenia and PNS followed 9 months of Motivation and Engagement Training. They were assessed before and after the intervention using the Negative Symptom Assessment (NSA), the Brief Negative Symptom Scale (BNSS), the Clinical Assessment Interview for Negative Symptoms (CAINS), and de the Defeatist Performance Beliefs scale. Results At baseline, defeatist performance beliefs were not significantly associated with negative symptoms, except with the motivation factor of the BNSS, but only at the trend level. However, change in defeatist beliefs was moderately correlated with change in motivation, as measured with the BNSS, but not with the other measures. Conclusion These results underlie the necessity of broadening the targets of psychosocial interventions to factors related to negative symptoms other than dysfunctional attitudes. [less ▲]

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See detailLes références à la maladie et à son traitement dans les archives de Zénon
Ricciardetto, Antonio ULiege

in Histoire des Sciences Médicales (2017, September), LI(2), 153-162

Amongst the 1837 papyri from the archive of Zenon, the private secretary to Apollonius, finance minister to Ptolemy II Philadelphus (285-246 BC), about twenty private Greek letters refer to ailments ... [more ▼]

Amongst the 1837 papyri from the archive of Zenon, the private secretary to Apollonius, finance minister to Ptolemy II Philadelphus (285-246 BC), about twenty private Greek letters refer to ailments suffered either by the sender or the recipient of the letter, or by a third party. How do these letters, which were not written by medical professionals, designate and describe diseases, their evolution and their outcome? This paper attempts to answer this question, while highlighting the contribution of these documents to the history of health and illness in Ptolemaic Egypt. [less ▲]

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See detailDietary inulin supplementation promotes weight loss in obese individuals
Hiel, Sophie; Rodriguez, Julie; Gianfrancesco, Marco ULiege et al

Poster (2017, September)

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See detailValidity and reliability of the French translation of the VISA-A questionnaire
Bruyère, Olivier ULiege; Kaux, Jean-François ULiege; Croisier, Jean-Louis ULiege

in European Journal of Sports Medicine (2017, September), 5(Supplement 1), 64

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See detailBio-chemical Raman imaging using targeted-SERS
Verdin, Alexandre ULiege; Malherbe, Cédric ULiege; Eppe, Gauthier ULiege et al

Poster (2017, September)

Raman and SERS spectral imaging, which consists in reconstructing a Raman intensity profile over a 2D or 3D section of a given sample (in presence or not of a nanosubstrate), allow to visualise the ... [more ▼]

Raman and SERS spectral imaging, which consists in reconstructing a Raman intensity profile over a 2D or 3D section of a given sample (in presence or not of a nanosubstrate), allow to visualise the variation of the chemical composition associated with the micro-structure of the sample. In particular, targeted-SERS imaging also enables the specific imaging of various macromolecules targeted by SERS probes in complex biological samples such as cancerous cells. To illustrate the versatility of Raman imaging, we describe two applications that were investigated recently in our laboratory. First, 3D Raman imaging was used to investigate a microcavity in a matrix of gypsum, revealing fossilised carbonaceous compounds dispersed in a filamentous shape, highly suggesting the presence of fossilised bacteria. Secondly, SERS probes were synthesised to specifically target the FRα receptor of folic acid which are often over-expressed at the surface of cancerous cells. Confocal Raman imaging was used to study the localization of the probes after incubation with KB cells (oral cancer) to confirm the specific targeting of FRα membrane receptors (Fig. 1). Moreover, our SERS probes allowed us to distinguish two different cancerous cell lines (namely KB and PC-3), based on the degree of expression of the FRα receptor of these two lines (high for KB and low for PC-3). In the future, these SERS probes may be used for distinguishing between cancerous and healthy cells since healthy cells have a lower degree of expression of FRα. [less ▲]

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See detailLocals in the Wasteland: The Non-Intended Side Effects of (In)Sensible Local Participatory Technology Development.
Parotte, Céline ULiege

Conference (2017, September)

Implementing high-level radioactive wastes programs on a territory remain a sensitive step for nuclear waste management organizations. At this stage, the preferred solution of radioactive wastes programs ... [more ▼]

Implementing high-level radioactive wastes programs on a territory remain a sensitive step for nuclear waste management organizations. At this stage, the preferred solution of radioactive wastes programs (geological disposal) and their technological developments become highly visible and this is why the new instruments and strategies such as participatory technology development (PDT) have been adopted to tackle the territorial development of geological disposal technology. Considering the coproduction between territory and program (Jasanoff 2004), this presentation focuses on two siting processes of radioactive wastes programs, in France and in Canada to analyze the influence of in(sensible) local participatory technology development strategy and the influence of invited critics (Wynne 2007) on the industrial project. Our results show that frameworks of the participatory technology development have been designed very differently (with or without publics). Consequently, two undesirable, mostly non-intended side effects of information local committees (non) integration have appeared. In France, a closed PDT transformed invited critics as non-invited one. In Canada, a weak engagement of publics has occurred with an opened PDT. In both case, new socio-technical adjustments have occurred in those programs. [less ▲]

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See detailTranslation and validation of the VISA-P questionnaire for French-speaking patients
Kaux, Jean-François ULiege; Croisier, Jean-Louis ULiege; Bruyère, Olivier ULiege

in European Journal of Sports Medicine (2017, September), 5(supplement 1), 63

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See detailPreparation and characterization of Silicon-carbon composite powders using recycled Silicon from solar cells as anode material in Li-ion batteries
Eshraghi, Nicolas ULiege; Mahmoud, Abdelfattah ULiege; Berardo, Loris ULiege et al

Poster (2017, September)

Currently, silicon (Si) coming from the recycling of solar cells is a non-valued fraction. The principal aim of this work is the development of silicon recovered during the dismantling of solar panels as ... [more ▼]

Currently, silicon (Si) coming from the recycling of solar cells is a non-valued fraction. The principal aim of this work is the development of silicon recovered during the dismantling of solar panels as electrode material for Li-ion batteries. The main technological challenge associated with the use of silicon in this type of application is to control the volume expansion during charge/discharge cycles. This drawback could be avoided through the formation of Silicon/carbon composites in which the size of the silicon particles and their dispersion must be controlled. In this research, we develop a carbon matrix consisting of graphene or carbon nanotubes (CNT) that allow the incorporation of silicon particles coated with a carbon layer (Si@C/C). The process is divided in two main steps : I) the grinding of leached Si wafer pieces in order to extract pure Si powder and then a mixed aqueous suspension of this recycled Si and an organic carbon source (Acetic acid, Ascorbic acid or Lactose) is spray-dried followed by heat treatment to generate the coating of silicon particles with carbon (Si@C). Then, II) aqueous suspension of Si@C and graphene/CNT is spray dried and calcined to obtain the final composite structure (Si@C/C). The morphology of composite materials is analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Electrochemical performance of Si@C/C composites are characterized by galvanostatic charge-discharge cycling and electrochemical impedance spectroscopy (EIS). [less ▲]

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See detailConspecific attraction in a landscape of fear: interaction between maternal, personal and social information about predation risk
Winandy, Laurane ULiege; Di Gesu, Lucie; Jacob, Staffan et al

Conference (2017, September)

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See detailDifferentiating pre- and post-grazing pasture heights using a 3D camera: a prospective approach
Andriamandroso, Andriamasinoro ULiege; Castro Muñoz, Eloy ULiege; Blaise, Yannick ULiege et al

in Berckmans, Daniel; Keita, Alassane (Eds.) Precision Livestock Farming ‘17 (2017, September)

Grasslands management involves the monitoring of both animal and plant components. Recent precision livestock farming developments have focused on high-rate monitoring of grazing animals to enhance ... [more ▼]

Grasslands management involves the monitoring of both animal and plant components. Recent precision livestock farming developments have focused on high-rate monitoring of grazing animals to enhance livestock productivity and welfare. The evolution of grass resource during the grazing process is not being overlooked by graziers and researchers, but grass characteristics, such as height, dry matter content, productivity or density, are still measured using low frequency and sometimes destructive and time-consuming methods; such as quadrat, sward-sticks, rising plate meters. This study investigated the potential of using 3D cameras to assess sward physical characteristics. Main objectives were: (1) to define the correct way to capture images, particularly the camera position above the ground and, (2) to assess if differences in sward height were detectable. Couples of images differing in grass height were captured on the same spot with a 3D camera at different above-ground heights (30, 40, 50 cm) on a ryegrass-white clover pasture. Pregrazing height was 15cm and post-grazing sward was simulated by cutting at 2 cm. Histograms of intensity performed on greyscale images showed differences between pre- and post-grazing sward. As expected, overall darker pixels were observed for pre-grazing images (p<0.01) and whiter pixels for post-grazing images (p<0.01), indicating longer distances consistent with lower forage biomass. Images taken at a distance of 30 and 40 cm could identify these differences. Further developments require improving the calibration of the camera and developing image analysis method to estimate more plant characteristics such as density or dry matter content. [less ▲]

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See detailImpact of a mountain ultra-marathon (UTMB) on cardiac biomarkers
Le Goff, Caroline ULiege; Gergelé, Laurent; Kaux, Jean-François ULiege et al

in European Journal of Sports Medicine (2017, September), 5(Supplement 1), 15-16

OBJECTIVES: While moderate exercise has beneficial effects on the cardiovascular system, consequences of a supraphysiological effort are not clear yet. In particular, the physiological consequences of ... [more ▼]

OBJECTIVES: While moderate exercise has beneficial effects on the cardiovascular system, consequences of a supraphysiological effort are not clear yet. In particular, the physiological consequences of ultramarathons need to be further documented. The aim of the study was to assess the changes of various cardiac biomarkers after a mountain ultramarathon. MATERIAL AND METHODS: Blood and urine samples were collected on 28 runners (17 men) participating to the UltraTrail du Mont Blanc (105 km, total positive elevation: 5600 m) at 3 different times: before the race (Pre), within 1 h after the finish (Post) and 7 days after the finish (D+7). Several biomarkers involved in heart disease (coronary syndrome, heart failure and fibrosis) and in inflammation were assayed on different analyzers such a COBAS® (for CKMB,TnThs, NTproBNP, HFABP and CRPs) and KRYPTOR® (for Copeptin). ST2 was measured manually with the Presage kit from CRITICAL DIAGNOSTIC®. RESULTS: Plasma levels of cardiac markers (CKMB, TnThs, NTproBNP, copeptin, HFABP, ST2) and inflammation (CRPs) increased significantly at Post. Means values increased from Pre to Post as follows: 2.3 to 91.9 UI/L for CKMB (p<0.0001); 7.6 to 31.7 ng/L for TnThs (p<0.0001); 41.7 to 1190.5 ng/L for NTproBNP, 4.2 to 22.9 pmol/L for copeptin (p=0.001); 3.6 to 107.8 ng/mL for HFABP (p<0.0001), 29.7 to 126.2 ng/mL for ST2 (p<0.0001); 0.5 to 29.1 mg/L for CRPs (p<0.0001). With the exception of a few (HFABP, ST2, CRPs) biomarkers in some subjects, all values were back to Pre values at D+7. DISCUSSION/CONCLUSION: Prolonged strenuous running exercise caused an elevation in cardiac biomarkers. Elevation in CKMB levels lacks specificity for cardiac damage as runners have increased CKMB from skeletal muscles as well. Previous studies suggested that exercise induced TnThs elevation is a benign reversible physiologic phenomenon but this parameter, as well as HFABP, could be a sign of ischemia. Different phenomena occurred such as stretch of myocytes causing an increase in pressure or volume and neurohormonal activation which can explain the Copeptine and NTproBNP increase, while ST2 is a biomarker of cardiac remodeling and fibrosis. CRP is an acute phase compound that tends to increase following a strenuous and prolonged bout of exercise and/or muscular injury. As the values tended to return within the normal reference range values within 7 days after the race, our study suggests that there is no permanent structural damage at the myocardium level. [less ▲]

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See detailPRELIMINARY STUDY ON BEAM-TO-COLUMN JOINTS UNDER IMPACT LOADING
D'Antimo, Marina ULiege; Latour, Massimo; Rizzano, Gianvittorio et al

in Proceedings CTA 2017 (2017, September)

Recent catastrophic events have pointed out the necessity of ensuring the integrity for structures under “exceptional” events. Since many years, the University of Liège is involved in different activities ... [more ▼]

Recent catastrophic events have pointed out the necessity of ensuring the integrity for structures under “exceptional” events. Since many years, the University of Liège is involved in different activities and projects mainly related to the robustness assessment of structures. The robustness of a structure is the capacity of the system to remain globally stable after events not directly ac- counted for in the design, like impact, fire or consequences of a human error, leading to a reason- able damage when compared to the original cause. Particular attention has been dedicated to the loss of column scenario with analytical and numerical investigations. As a contribution to differ- ent European projects (FREEDAM and ROBUSTIMPACT), experimental campaigns have been carried out or are currently undergoing, with the aim of understanding the behaviour of different joint typologies under impact loads. The experimental campaigns have the goal to underline the influence of the strain-rate of the joint components on the behaviour of the tested connections. In the present paper, an overview on the design criteria for the ongoing experimental campaign, on the preliminary results and findings is given and critically analysed. Particularly, an application in the field of the FREEDAM project is presented. [less ▲]

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See detailRecycling of silicon used in solar cells to prepare silicon-carbon composite powders as anode material in li-ion batteries
Eshraghi, Nicolas ULiege; Mahmoud, Abdelfattah ULiege; Berardo, Loris ULiege et al

Poster (2017, September)

Currently, silicon (Si) coming from the recycling of solar cells is a non-valued fraction. The principal aim of this work is the development of silicon recovered during the dismantling of solar panels as ... [more ▼]

Currently, silicon (Si) coming from the recycling of solar cells is a non-valued fraction. The principal aim of this work is the development of silicon recovered during the dismantling of solar panels as an electrode material for lithium or sodium batteries. The main technological challenge associated with the use of silicon in this type of application is to control the volume expansion during charge/discharge cycles. This problem could be solved through the synthesis of Silicon/carbon composites in which the size of the silicon particles and their dispersion must be controlled [1–4]. We develop a carbon matrix consisting of graphene or carbon nanotubes (CNT) that allow the incorporation of silicon particles coated with a carbon layer (Si@C/C). The process is divided in two main steps. In the first step, Si wafer pieces are ground to prepare Si powder and then a mixed suspension of Si and an organic carbon source (Acetic acid, Ascorbic acid or Lactose) is spray-dried followed by heat treatment to generate the coverage of silicon particles with carbon (Si@C). In the second step, aqueous suspension of Si@C and graphene/CNT is spray dried and heat treated to obtain the final composite structure. The morphology of composite materials is analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Electrochemical performance of Si@C/C composites are characterized by galvanostatic charge-discharge cycling and electrochemical impedance spectroscopy (EIS). [less ▲]

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See detailTD-GCxGC-HRTOFMS in biological applications 
Focant, Jean-François ULiege; Pesesse, Romain ULiege; Dubois, Lena ULiege et al

Conference (2017, September)

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See detailA two-step methodology for human pose estimation increasing the accuracy and reducing the amount of learning samples dramatically
Azrour, Samir ULiege; Pierard, Sébastien ULiege; Geurts, Pierre ULiege et al

in Advanced Concepts for Intelligent Vision Systems (2017, September)

In this paper, we present a two-step methodology to improve existing human pose estimation methods from a single depth image. Instead of learning the direct mapping from the depth image to the 3D pose, we ... [more ▼]

In this paper, we present a two-step methodology to improve existing human pose estimation methods from a single depth image. Instead of learning the direct mapping from the depth image to the 3D pose, we first estimate the orientation of the standing person seen by the camera and then use this information to dynamically select a pose estimation model suited for this particular orientation. We evaluated our method on a public dataset of realistic depth images with precise ground truth joints location. Our experiments show that our method decreases the error of a state-of-the-art pose estimation method by 30%, or reduces the size of the needed learning set by a factor larger than 10. [less ▲]

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See detailMars proton aurora: energy deposition and Lyman-α line profile
Gérard, Jean-Claude ULiege; Hubert, Benoît ULiege; Bisikalo, D. V. et al

Conference (2017, September)

Enhancements of the Lyman-alpha dayglow have been occasionally observed with IUVS on board MAVEN during periods of increased solar wind activity. They are interpreted as signatures of the penetration of ... [more ▼]

Enhancements of the Lyman-alpha dayglow have been occasionally observed with IUVS on board MAVEN during periods of increased solar wind activity. They are interpreted as signatures of the penetration of energetic protons and H atoms into the Martian atmosphere. We present the results of Monte Carlo simulations of the energy deposition of the proton/H atom beam and the subsequent Lyman-alpha emission. We compare the observed brightness and the altitude of the emission peak with those calculated based on in-situ measurements of the incident energetic protons. [less ▲]

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See detailHow to encourage conservators to produce knowledge. The CeROArt ‘lab’: Looking back at ten years of experience
Verbeeck, Muriel ULiege

in Bridgland, Janet (Ed.) Linking Past and Future (2017, September)

Knowledge transmission through a scientific publication is something that can be taught and learned. The CeROArt journal started a project that it has supported and developed over the past ten years to ... [more ▼]

Knowledge transmission through a scientific publication is something that can be taught and learned. The CeROArt journal started a project that it has supported and developed over the past ten years to provide educational support to first-time authors who have graduated in conservation, to encourage them to publish their work. This experience, conducted in Open Access with the support of several European training courses, highlights the skills acquired at the end of their studies in terms of scientific communication. It can also be used to consider several avenues for stimulating knowledge pro- duction outside the academic environment. [less ▲]

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See detailPlatelet-rich plasma versus hyaluronic acid to treat tendinopathies
Kaux, Jean-François ULiege; Robertjot, Mathieu; SAMSON, Antoine ULiege et al

in European Journal of Sports Medicine (2017, September), 5(Supplement 1), 21-22

INTRODUCTION: The treatment of patellar tendinopathies could be difficult. This is the reason why new treatments have been developed, among which platelet rich plasma (PRP) injections. Some clinical ... [more ▼]

INTRODUCTION: The treatment of patellar tendinopathies could be difficult. This is the reason why new treatments have been developed, among which platelet rich plasma (PRP) injections. Some clinical series have previously evaluated the effect of PRP in the treatment of proximal patellar tendinopathies. Recent systematic review concluded that PRP could be recommend as a treatment in such indication (1). Recently, the viscoelastic properties of hyaluronic acid (HA) on liquid connective tissue have been proposed for the treatment of tendinopathies (2). Some fundamental studies show encouraging results on HA’s ability to promote tendon gliding and reduce adhesion as well as to improve tendon architectural organisation. Some observations also support its use in a clinical setting to improve pain and function. PURPOSE: We aimed to compare the effect of PRP injection versus two injections of HA after three months on patients who have a proximal patellar tendinopathy. METHODS: Thirtythree sportsmen with proximal patellar tendinopathies being not relieved after minimum three months of normal physiotherapy treatments where included. Eighteen of them (group 1) have received a leukocyte poor PRP injection (obtained using an aphaeresis machine (3)) and the other fifteen (group 2) two HA injections, all of them have benefited of standardized rehabilitation. Concerning the evaluation of the pathology, algofunctional tests (visual analogic scale (VAS), pressure algometer, IKDC score, VISAP score), isokinetic (associated to VAS) along with the patellar tendon ultrasonography (US) have been realized over three times (preinjection, after 6 weeks, after 3 months postinjections). RESULTS: The results of VAS (p<0,01), algometric scores (p<0,01), IKDC scores (p<0,01) and VISAP (p<0,01) show a considerable improvement in the two groups, but not for the US findings. For the group 1, isokinetic tests show significative results for the hamstrings in C60°/s with an improvement of maximum peak torque (p=0,01) for the pathological member, a diminution (p>0,05) for the healthy limb and during the analysis of the bilateral difference (p=0,0002). For the group 2, the improvement of quadriceps maximum peak torque in C240°/s is significant (p>0,01) for the pathological knee after 6 weeks post injections only. The VAS associated with isokinetic tests decreases significantly for all contraction modes after three months of study. CONCLUSIONS: Both PRP and HA can improve the symptoms of proximal patellar tendinopathy, even if the results are slightly better in the PRP group. REFERENCES: Andia I et al., Plateletrich plasma in the conservative treatment of painful tendinopathy: a systematic review and metaanalysis of controlled studies. Br Med Bull. 2014 Jun;110(1):99115. Kaux JF et al., Hyaluronic acid and tendon lesions. Muscles Ligaments Tendons J. 2016 Feb 13;5(4):2649. Kaux JF et al. Using platelet rich plasma to treat jumper's knees: Exploring the effect of a second closely timed infiltration. J Sci Med Sport. 2016 Mar;19(3):2004. [less ▲]

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See detailHeterotrophy compared to phototrophy for growth characteristics and pigment compositions in batch cultures of four green microalga
Le Thanh Tung, ULiege; Corato, Amélie ULiege; Gerards, Thomas ULiege et al

Poster (2017, September)

Growth curves of four species of green microalgae have been compared under photoautotrophy, heterotrophy and dim-light-assisted heterotrophy during batch cultivation in small-scale multicultivators ... [more ▼]

Growth curves of four species of green microalgae have been compared under photoautotrophy, heterotrophy and dim-light-assisted heterotrophy during batch cultivation in small-scale multicultivators equipped with automated optical density acquisition. The results showed that the most relevant biomass productivity parameter (based on Vmax) can be estimated after proper correction of growth curves. For photoautotrophic cultures, Vmax showed no clear relationship to µmax, the specific growth rate measured during exponential phase. Heterotrophic cultures, which are not limited by light penetration, can be characterized by their µmax values, which showed a broad range of values depending more on species than on carbon source (glucose or acetate). Weak light (defined as unable to sustain photoautotrohic growth) had only minor effects on heterotrophic growth in terms of biomass but, for some species, could be used to promote pigment accumulation up to levels comparable to those found under photoautotrophy, as revealed by HPLC analysis. [less ▲]

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See detailCharacterisation of a secondary carotenoid producer microalga of the genus Coelastrella
Corato, Amélie ULiege; Franck, Fabrice ULiege; Jacques, Philippe ULiege

Poster (2017, September)

Some green microalgae synthesize secondary carotenoids as protecting agents under stress. These pigments have high value as feed supplement for aquaculture and as health products. The most promising ... [more ▼]

Some green microalgae synthesize secondary carotenoids as protecting agents under stress. These pigments have high value as feed supplement for aquaculture and as health products. The most promising pigment is astaxanthin, because of its antioxidant, antitumoral and anti-inflamatory properties. The most used natural source of this pigment is the microalga Haematococcus pluvialis. However this species grows slowly and lacks robustness for easy cultivation. Therefore, other species are investigated for astaxanthin production. Here, we identified a locally isolated strain as Coelastrella sp. that is a secondary carotenoid producer. [1] A known typical feature of this genus, that we could observed in the strain by scanning electron microcopy, is the presence of meridional ribs. [2] We analyzed the culture conditions and concluded that this strain grows both autotrophically and heterotrophically and is able of fast change in pigment composition under controlled stress conditions. Thanks to HPLC analyses, we determined that the strain accumulates a variety of secondary carotenoids, among which: astaxanthin, cantaxanthin and echinenone. Unidentified compounds will be further analyzed by mass spectrometry. [less ▲]

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See detailTraduction et validation du "Exercise-Induced Leg Pain Questionnaire" pour les patients francophones
Kaux, Jean-François ULiege; Hagelstein, Thibaut; Van Beveren, Julien et al

in 10ème Congrès Commun SFMES-SFTS (2017, September)

Contexte : L’EILP-G a été développé afin d’évaluer la sévérité des symptômes affectant la fonction physique et les capacités sportives chez des patients présentant des douleurs de jambe à l’effort. Le ... [more ▼]

Contexte : L’EILP-G a été développé afin d’évaluer la sévérité des symptômes affectant la fonction physique et les capacités sportives chez des patients présentant des douleurs de jambe à l’effort. Le questionnaire a déjà été traduit en anglais et en grec. Objectifs : Le but de cette étude est de traduire et de réaliser une adaptation interculturelle du questionnaire EILP-G en français ainsi que d’en évaluer ses propriétés psychométriques. Matériel et Méthode : Le processus de traduction et d’adaptation interculturelle de l’exercise-induced leg pain questionnaire for German-speaking patients (EILP-G) a été guidé par les recommandations internationales d’adaptation interculturelle de questionnaires mesurant l’état de santé. Six étapes ont été respectées : (1) traduction française initiale, (2) synthèse de traduction française, (3) traduction inverse allemande, (4) comité d’expert, (5) test de la version pré-finale, (6) approbation du comité d’expert. 84 sujets furent recrutés et répartis en 3 groupes afin de tester l’EILP-FR : un groupe de sujets pathologiques (n=28), des sportifs à risque de développer ce type de pathologie (n=28) et des étudiants en sciences de la motricité asymptomatiques (n=28). Tous les sujets (n=84) ont rempli le questionnaire français à deux reprises avec un intervalle de 7 à 10 jours, parallèlement au Short Form Health Survey (SF-36) afin de pouvoir évaluer la fiabilité et la validité de l’EILP-FR. Résultats : L’EILP-FR indique une fidélité test-retest très bonne concernant le score total (ICC 0,96). Il en va de même pour le score total de chaque sous-groupe (ICC 0,88-0,94) ainsi que pour chaque item (0,75-0,92). Le questionnaire français présente une cohérence interne élevée (0,93). La corrélation entre l’EILP-FR et le SF-36 est modérée pour le score total (0,51;p<0.001). Une corrélation forte se présente entre le questionnaire et une partie des sous-échelles convergentes du SF-36 (PF, RP et BP ; chaque p<0.001). Les sous-échelles divergentes évaluant les propriétés psychologiques du SF-36 présentent toutes une corrélation faible et statistiquement non-significatives (RE, SF, VT), excepté MH (p<0.05). Aucun effet plancher ou plafond n’a été détecté. Conclusion : La version française, adaptée de la version originale EILP-G, a été traduite et adaptée interculturellement avec succès. L’EILP-FR est un questionnaire fiable et valide pour évaluer les patients francophones souffrant de douleurs chroniques de jambe à l’effort. [less ▲]

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See detailThe role of large trees in the biomass production of heterogeneous forest
Ligot, Gauthier ULiege; Ouedraogo; Bauwens, Sébastien ULiege et al

Poster (2017, September)

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See detailAdaptation interculturelle du questionnaire"Kujala Anterior Knee Pain Scale » pour les patients francophones
Buckinx, Fanny ULiege; Remy, Gaël; Bornheim, Stephen ULiege et al

in 10ème Congrès Commun SFMES-SFTS (2017, September)

Introduction : Le syndrome fémoro-patellaire est l'un des problèmes du genou les plus fréquemment rencontrés. Il se caractérise par une douleur antérieure du genou dans les activités mettant en charge l ... [more ▼]

Introduction : Le syndrome fémoro-patellaire est l'un des problèmes du genou les plus fréquemment rencontrés. Il se caractérise par une douleur antérieure du genou dans les activités mettant en charge l'articulation fémoro-patellaire. Le Kujala Anterior Knee Pain Scale (Kujala AKPS) est un questionnaire utilisé pour évaluer les symptômes subjectifs, telles que les limitations fonctionnelles et la douleur antérieure du genou. Le questionnaire a déjà été traduit et validé en turc, en portugais brésilien, en persan, en chinois, et en néerlandais. Le but de cette étude est de traduire ce questionnaire en français afin d'en évaluer sa fiabilité et sa validité. Matériel et méthode : La traduction et l’adaptation interculturelle du questionnaire ont été réalisées selon les recommandations internationales comprenant 6 étapes : traduction initiale, synthèse des traductions, traduction de retour vers la langue d’origine, comité d'experts, test de la version pré-finale et approbation du comité d'experts. Une fois la version française obtenue, les participants (n=101) ont rempli 2 fois le Kujula AKPS à un intervalle de 7 jours, et le Short Form Health Survey (SF-36) afin d'en évaluer les propriétés psychométriques (la cohérence interne, la fidélité test-retest et la validité de construit). Résultats : Le Kujula AKPS montre une fidélité test-retest élevée pour le score total (ICC 0,97). La traduction française possède une cohérence interne élevée (0,87). Le Kujula AKPS possède une corrélation forte avec une partie des sous-échelles convergentes du SF-36 (PF, RP et BP). Il y a une corrélation faible ou modérée avec les sous-échelles divergentes du SF-36 (MH, SF et VT). Il n’y a pas d’effet plancher et plafond. Conclusion : La version française du questionnaire Kujula AKPS étant facilement compréhensible, elle semble avoir une bonne adaptation interculturelle. Cette étude a démontré que le Kujula AKPSF est fiable et valide pour les patients francophones souffrant d'un syndrome rotulien. [less ▲]

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See detailNew filamentous mutant of Yarrowia lipolytica and its use in biofilm bioreactors
Vandermies, Marie ULiege; Kar, Tambi ULiege; Denies, Olivia ULiege et al

Poster (2017, September)

The non-conventional yeast Yarrowia lipolytica is widely investigated for its unusual metabolic properties. Among them is the ability of Y. lipolytica to adopt an ovoid or hyphal morphology according to ... [more ▼]

The non-conventional yeast Yarrowia lipolytica is widely investigated for its unusual metabolic properties. Among them is the ability of Y. lipolytica to adopt an ovoid or hyphal morphology according to environmental conditions. The mechanism of dimorphic transition involves numerous genes, which have been poorly documented to date. Here, we report on the isolation of a filamentous mutant from an insertion mutagenesis library, the subsequent identification of the mutated gene, and the use of this filamentous mutant in biofilm bioreactors. [less ▲]

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See detailNightside temperature measurements at 95 km from OH nightglow in the Venus atmosphere
Migliorini, A.; Snels, M.; Gérard, Jean-Claude ULiege et al

Poster (2017, September)

Temperature estimations at an altitude of about 95 km on the night side of Venus are provided. They are derived from hydroxyl nightglow emissions, observed in the infrared spectral range at 2.7-3.5 micron ... [more ▼]

Temperature estimations at an altitude of about 95 km on the night side of Venus are provided. They are derived from hydroxyl nightglow emissions, observed in the infrared spectral range at 2.7-3.5 micron, using the Visible and Infrared Thermal Imaging Spectrometer on board Venus Express. [less ▲]

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See detailA mitochondrial mutation increases high light resistance in Chlamydomonas reinhardtii.
Larosa, Véronique ULiege; Meneghesso, Andrea; La Rocca, Nicoletta et al

Poster (2017, September)

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See detailAssessing Landscape Quality: is there a consensus among experts?
Vanderheyden, Vincent ULiege; Schmitz, Serge ULiege

Conference (2017, September)

The paper analyses how 42 landscape experts from Wallonia and Romania mark their agreement on 52 Likert-items regarding landscape quality.

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See detailPhoto-Ionization GCxGC-HRTOF/MS for Aviation Fuel Characterization
Giri, Anupam ULiege; Courtiade; Racaud et al

Conference (2017, September)

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See detailCerebrospinal uid sampling at C1–C2
Busoni, Valeria ULiege

in BEVA Proceedings (2017, September)

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See detailSynthesis, characterization, and durability study of Pt-Co hollow nanoparticles deposited on carbon xerogel electrocatalysts for Proton Exchange Membrane Fuel Cells (PEMFC)
Zubiaur, Anthony ULiege; Asset, Tristan ULiege; Olu, Pierre-Yves et al

Poster (2017, September)

Proton exchange membrane fuel cell (PEMFC) catalysts are generally made of carbon black (CB)supported platinum-based nanoparticles. However, the properties of CBs, as described by RodríguezReinoso [1 ... [more ▼]

Proton exchange membrane fuel cell (PEMFC) catalysts are generally made of carbon black (CB)supported platinum-based nanoparticles. However, the properties of CBs, as described by RodríguezReinoso [1], are not optimal for electrocatalysis. A possible solution to the drawbacks of CBs is the use of synthetic nanostructured materials with a controllable and reproducible texture and with a pure, known and constant chemical composition; carbon xerogels (CX) exhibit such properties [2]. Recently, various highly dispersed CX-supported Pt nanoparticles catalysts (Pt/CX) have been synthesized via several methods, such as the strong electrostatic adsorption (SEA) [3] or the charge-enhanced dry impregnation (CEDI) [4]. However, the decrease of the Pt mass contained in the PEMFC electrodes, in particular at the cathode where the oxygen reduction reaction (ORR) is processed, remains a major challenge. Improving the ORR mass activity is currently best achieved by alloying Pt with 3d-transition metal atoms such as cobalt (Co). These alloys perform better than the ORR because the substitution of some Pt atoms by 3d-metal atoms with smaller radius leads to a modified Pt electronic structure [5]. The synthesis and durability of Pt-Co hollow particles/CX (Fig. 1) is currently being studied in our groups. The results indicate that the specific and mass activity of the bimetallic hollow particles dispersed on CX is ca. 10 times higher than that of pure Pt/CB. The first durability results show good stability of the hollow particles structure. Performances and accelerated stress tests (ASTs) in PEMFCs were finally performed. [less ▲]

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See detailQuest for the invisible: where do non-heterosexual women meet, share and laugh?
Nessi, Cecilia ULiege

Conference (2017, September)

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See detailUltrasonic spray deposition of electrochromic oxide films
Maho, Anthony ULiege; Manceriu, Laura ULiege; Colson, Pierre ULiege et al

Poster (2017, September)

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See detailA technological and functional examination of the Aurignacian end-scrapers from Grotta di Fumane
Aleo, Alessandro; Duches, Rossella; Rots, Veerle ULiege et al

Poster (2017, September)

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See detailUseful tools for genome editing in the non-conventional yeast Yarrowia lipolytica
Vandermies, Marie ULiege; Denies, Olivia ULiege; Nicaud, Jean-Marc et al

Poster (2017, September)

The non-conventional yeast Yarrowia lipolytica is increasingly used for the production of recombinant proteins or biomolecules with biotechnological or pharmaceutical applications. The development of such ... [more ▼]

The non-conventional yeast Yarrowia lipolytica is increasingly used for the production of recombinant proteins or biomolecules with biotechnological or pharmaceutical applications. The development of such a cell factory requires steps of genome editing that rely on selectable markers. The recently identified EYK1, encoding erythrulose kinase, can serve as an efficient catabolic selectable marker for genome editing in Y. lipolytica. Besides, the cloning-free strategy developed here simplifies the construction of disruption cassettes for genome editing in Y. lipolytica. [less ▲]

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See detailPromoting "health literacy friendly" healthcare institutions
Henrard, Gilles ULiege

Poster (2017, September)

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See detailLa force de la sous-culture de responsabilité comme condition d’amélioration continue dans l’hôpital
Bounazef, Djida ULiege; Van Caillie, Didier ULiege; Salaouatchi et al

Conference (2017, September)

Ce papier positionne la sous-culture de responsabilité comme facteur d’amélioration continue à travers le renforcement des valeurs et pratiques. Il analyse les valeurs, les comportements, les facteurs de ... [more ▼]

Ce papier positionne la sous-culture de responsabilité comme facteur d’amélioration continue à travers le renforcement des valeurs et pratiques. Il analyse les valeurs, les comportements, les facteurs de motivation/démotivation à l’engagement et la perception du leadership de 380 médecins dans des hôpitaux algériens. Les résultats montrent des corrélations significatives entre le niveau d’implication de l’équipe dirigeante, le poids des contre-cultures, la perception des sous-cultures, l’appartenance aux groupes catégoriels et la normalisation des comportements et valeurs partagées des médecins. Ces interactions représentent un facteur déterminant dans les processus d’amélioration continue. [less ▲]

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See detailModelle zur Untersuchung von Massenbewegungen und Hangstabilität in seismischen Regionen
Mreyen, Anne-Sophie ULiege; Anja, Dufresne; Havenith, Hans-Balder ULiege

in Fachsektionstage Geotechnik - Interdisziplinäres Forum (2017, September)

Zwei von Erdrutschen betroffene Regionen in NW- und Mitteleuropa werden mittels Hangstabilitätsanalysen in Form von 3D-Geo-Modellen und numerischer 2D-Modellierung untersucht: (1) die Hockai-Störungszone ... [more ▼]

Zwei von Erdrutschen betroffene Regionen in NW- und Mitteleuropa werden mittels Hangstabilitätsanalysen in Form von 3D-Geo-Modellen und numerischer 2D-Modellierung untersucht: (1) die Hockai-Störungszone (HFZ – Hockai Fault Zone) in Ostbelgien und (2) die seismische Region Vrancea in den rumänischen Karpaten. Die Untersuchungsgebiete unterscheiden sich hinsichtlich ihrer klimatischen und seismo-tektonischen Bedingungen, sind jedoch beide von tiefsitzenden Hangbewegungen entlang aktiver bzw. inaktiver Störungszonen betroffen. Obwohl es zurzeit keinerlei eindeutige Belege massiver co-seismischer Erdrutsche in NW Europa gibt, ist die seismisch aktive HFZ in Belgien (bekannt durch das M~6-6.3 Verviers Ereignis in 1692) durch größere Massenbewegungen mit wahrscheinlichem seismischen Ursprung gekennzeichnet. Die Region Vrancea in Rumänien dagegen ist von kleineren (< 1 Mio. m³) bekannten seismischen Massenbewegungen geprägt (ausgelöst durch Erdbeben in 1940 und 1977). In solchen Regionen müssen dynamische Stabilitätsanalysen potentielles Bodenversagen durch Erdbeben berücksichtigen. Um die Massenbewegungen beider Regionen aufzuschließen, wurden verschiedene Methoden angewandt. Zu den Erkundungsmethoden zählen geotechnische, geologische und geomorphologische Untersuchungen, wie auch geophysikalische Methoden: ERT (electrical resistivity tomography), mikroseismische Bodenunruhe-Messungen (H/V-Methode), sowie SRT (seismic refraction tomography) samt Analyse seismischer Oberflächenwellen. Insbesondere die H/V-Methode ist eine zunehmend gebräuchliche Methode zur Erkundung von Hangrutschungen (1D-Abschätzung von Lockersedimentschichten, d.h. in diesem Fall von gestörten Bodenschichten). Geomechanische Eigenschaften des Hangmaterials wurden mithilfe von kleinen geotechnischen Studien (Erkundungsbohrungen, Schmidt Hammer, Strukturanalysen) und seismischen Parametern ermittelt. 3D-Geo-Modelle ermöglichen die Integration der gemessenen Daten durch Datenfusion und geostatistische Techniken. Dabei wird die Modelloberfläche anhand hochauflösender Fernerkundungsdaten (1 m LiDAR – Light Detection and Ranging) abgebildet, der Untergrund des Untersuchungsgebiets hingegen durch die Modellierung geologischer Trennflächen und Volumina. Die Geo-Modelle dienen als Basis zur Übertragung der ermittelten Daten in 2D numerische Modelle. Eine dynamische back-analysis der Untersuchungsgebiete ermöglicht die numerische Berechnung seismischer Auswirkungen auf die rutschungsanfälligen Hänge. [less ▲]

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See detailIs a Memoryless Motion Detection Truly Relevant for Background Generation with LaBGen?
Laugraud, Benjamin ULiege; Van Droogenbroeck, Marc ULiege

in Advanced Concepts for Intelligent Vision Systems (2017, September)

The stationary background generation problem consists in generating a unique image representing the stationary background of a given video sequence. The LaBGen background generation method combines a ... [more ▼]

The stationary background generation problem consists in generating a unique image representing the stationary background of a given video sequence. The LaBGen background generation method combines a pixel-wise median filter and a patch selection mechanism based on a motion detection performed by a background subtraction algorithm. In our previous works related to LaBGen, we have shown that, surprisingly, the frame difference algorithm provides the most effective motion detection on average. Compared to other background subtraction algorithms, it detects motion between two frames without relying on additional past frames, and is therefore memoryless. In this paper, we experimentally check whether the memoryless property is truly relevant for LaBGen, and whether the effective motion detection provided by the frame difference is not an isolated case. For this purpose, we introduce LaBGen-OF, a variant of LaBGen leverages memoryless dense optical flow algorithms for motion detection. Our experiments show that using a memoryless motion detector is an adequate choice for our background generation framework, and that LaBGen-OF outperforms LaBGen on the SBMnet dataset. We further provide an open-source C++ implementation of both methods at http://www.telecom.ulg.ac.be/labgen. [less ▲]

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See detailSMART RIVERS 2017
Rigo, Philippe ULiege; MUSKATIROVIC, JASNA; JAIMURZINA, AZHAR et al

in SMART RIVERS 2017, Pittsburgh (PIANC) (2017, September)

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See detailThe impact of Paul Philippot on the theory and history of conservation/restoration
Stoner, Joyce; Verbeeck, Muriel ULiege

in Bridgland, Janet (Ed.) Linking Past and Future (2017, September)

Paul Philippot (1925–2016) was an influential conservation theoretician and author in addi- tion to serving as an important leader or col- laborator with major conservation institutions in Europe (ICR ... [more ▼]

Paul Philippot (1925–2016) was an influential conservation theoretician and author in addi- tion to serving as an important leader or col- laborator with major conservation institutions in Europe (ICR, ICCROM, IIC, UNESCO, ICOM, etc.). He was an art historian born into a Belgian fam- ily of conservator-restorers. The authors were privileged to interview him in 1997, 2009 and 2015. Verbeeck discusses Philippot’s relation to and reinterpretation of the philosophy of Cesare Brandi, his definition of restoration as both an intellectual judgment and a critical act, and his influence on the establishment of an interdis- ciplinary curriculum for pioneer training pro- grams. Stoner describes Philippot’s emphasis on the impact of language on communication of philosophical concepts in his 1997 interview in addition to key points in his publications once they were available in English, especially his de- scription of patina as the normal effect that time has on material and the search for equilibrium in cleaning paintings. [less ▲]

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See detailSurgical factors and not donor type per se are risk factors for acute kidney injury after liver transplantation
MEURISSE, Nicolas ULiege; Smet, Heloise ULiege; LEDOUX, Didier ULiege et al

in Transplant International (2017, September), 30(S2), 106-107298

Background: Because Liver Transplantation (LT) using DCD has been shown to be risk factor for Acute Kidney Injury (AKI), we reviewed results at our center. Patients and Methods: AKI was defined as ... [more ▼]

Background: Because Liver Transplantation (LT) using DCD has been shown to be risk factor for Acute Kidney Injury (AKI), we reviewed results at our center. Patients and Methods: AKI was defined as decrease >50% eGFR (CKD- EPI) within 48 h postreperfusion (RIFLE). 106 first LT-only [63 DBD (59%) & 43 DCD (41%)] without pre-existing renal dysfunction (eGFR>60 ml/min/1,73 m2, no renal replacement therapy) were performed from 2012 to 2016. Incidence/ risk factors for AKI were assessed. Data: mean (IQR). Results: Incidence of AKI was 33% (35/106). AKI-patients were more hospitalized before LT [9/16 (56%) vs 26/89 (29%), p < 0.01], with higher labMELD [16 (10–23) vs 12 (8–16), p = 0.01]. Donor type [11/43 DCD (25%) vs 24/63 DBD (39%), p = 0.16], donor hepatectomy time [38 min (26–50) vs 35 (25–42), p = 0.37], cold ischemic time [6 h (4.1–7.6) vs 5.1 (3.4–6.4), p = 0.21], time for anastomosis [44 min (35–49) vs 42 (38–48), p = 0.53], postreperfusion syndrome [19/46 (42%) vs 27/46 (58%), p = 0.07] were similar between AKI & non-AKI groups. AKI was more frequent if lungs were procured first in the donor [23/48 (48%) vs 11/56 (19%), p < 0.01]. Recipient surgery was longer in the AKI group [5.2 h (3.9–6.3) vs 4.3 (3.4–4.8), p < 0.01]. AKI was more frequent if platelets were transfused during LT [19/42 (56%) vs 15/59 (44%), p = 0.03]. Blood volume administrated from the cellsaver was larger in the AKI-patients [834 ml (300–750) vs 408 (0–550), p = 0.03]. AKI-patients have a higher peak AST [1235 U/L (310–1858) vs 812 (429–978), p = 0.04]. Haemoglobin [8.8 g/dl (7.4–9.9) vs 10 (8.5–11.7)] & platelets [69x103 (50 9 103–87 9 103) vs 89 9 103 (50 9 103–118 9 103)] at day 1 postreperfusion were significantly lower if AKI occurred. After multivariable analysis, thoracic procurement before liver [OR 5.75 (1.76–18.77), p = 0.004] & recipient surgery duration [OR 1.64 (1.15–2.32), p = 0.006] were only risk factors for AKI. Conclusion: Rapid donor/recipient surgery and not donor type are key factors to prevent AKI-post-LT. [less ▲]

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See detailCould indolic glucosinolates root profiling be correlated to Brassica napus L. cadmium stress tolerance?
Durenne, Bastien ULiege; Blondel, Alodie; Druart, Philippe et al

Poster (2017, September)

Glucosinolates profiling among Brassicaceae and Brassica napus L. especially is largely studied regarding biotic stress. Nevertheless literature review could lead to suppose that theses secondary ... [more ▼]

Glucosinolates profiling among Brassicaceae and Brassica napus L. especially is largely studied regarding biotic stress. Nevertheless literature review could lead to suppose that theses secondary metabolites hugely produced within Brassicaceae family can interact in regards to cadmium stress as well. Sulfate primary metabolism plays an important role to Brassica napus L. cadmium stress tolerance and glucosinolates could serve as sulfate pool under such stress conditions. We describe here an in vitro experiment performed under sterile and controlled conditions showing the relationship between Brassica napus L. var. Es Astrid tolerance to a low concentration of cadmium and a decrease of a major indolic glucosinolates produced by the roots of this variety. Phenotyping results obtained from these cadmium stress conditions confirm also that Brassica napus L. remains a highly cadmium tolerant species probably due to glucosinolates root metabolism particularly. [less ▲]

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See detailDO MESENCHYMAL STROMAL CELLS PROMOTE HLA SPECIFIC ANTIBODIES FORMATION AFTER INFUSION IN LIVER TRANSPLANT RECIPIENTS?
VANDERMEULEN, Morgan ULiege; MAGGIPINTO, Gianni ULiege; JOURET, François ULiege et al

in Transplant International (2017, September), 30(S2), 548051

Background: Mesenchymal stromal cells (MSC) immunogenicity is debated. We recently published a prospective, controlled, phase I study evaluating a single administration of third-party MSC in 10 liver ... [more ▼]

Background: Mesenchymal stromal cells (MSC) immunogenicity is debated. We recently published a prospective, controlled, phase I study evaluating a single administration of third-party MSC in 10 liver transplant recipients (LTR). Here, we focus on the development of antibodies (Ab) against MSC-donor HLA (MSCDSA) in LTR following MSC infusion. Methods: Ten LTR under standard immunosuppression received 3rd-party unrelated MSC on postoperative day 3, and were prospectively compared to 10 control LTR. Recipients and donor of either liver or MSC were genotyped for HLA A/B/C/DR/DQ. Recipients were tested for HLA Ab before and 1, 3 and 6 months after transplant by Luminex". Ab were considered as positive in case of MFI >1500 and in accordance with the manufacturer’s recommendations. Results: In MSC-treated group, 2 patients showed pre-transplant MSCDSA. During follow-up, MSCDSA were detected in 6 additional patients who had received multiple red blood cell allo-transfusions before and/or rapidly after transplant. These patients also developed Ab against various MSC-unrelatedHLA. Two patients did not develop any MSCDSA throughout the follow-up, and one of them did not receive any allo-transfusion. MFI of detected MSCDSA were not significantly different from MFI of other detected HLA Ab. In control group, 3 patients were sensitized pre-transplant, and 6 patients developed de novo multiple HLA Ab. Four of these had received multiple allo-transfusions. Conclusion: In the large pool of HLA Ab identified in LTR post transplant, the detection of MSCDSA is most likely caused by allo-transfusions rather than related to MSC infusion. Further studies are required to confirm that MSC are “immune privileged”. [less ▲]

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See detailModel for the penetration of magnetic flux in Nb superconducting films with lithographically defined indentations and defects due to inhomogeneities
Vanderheyden, Benoît ULiege; Avila Osses, Jonathan ULiege; Brisbois, Jérémy ULiege et al

Conference (2017, August 31)

We consider the penetration of magnetic flux perpendicularly to a Nb superconducting film containing edge indentations and/or defects. The induced currents undergo an abrupt change of direction around the ... [more ▼]

We consider the penetration of magnetic flux perpendicularly to a Nb superconducting film containing edge indentations and/or defects. The induced currents undergo an abrupt change of direction around the indentations and the defects, giving rise to discontinuity lines (d-lines). It has recently been shown, by means of magneto-optical imaging and numerical models, that the detailed structure of the d-lines generated with lithographically-defined micro-indentations carry information about their size and shape, and vary with temperature [1]. In this talk, we describe the models which can be used to describe the d-lines and discuss the effects of temperature, demagnetization, and flux creep, as well as the influence of a field-dependent critical current density on the distribution of the magnetic field. We extend the model to discontinuities produced by defects arising from inhomogeneous properties of the film and discuss the information contained in the resulting d-line structure. Last, in contrast to what has been repeatedly predicted in the literature, artificial indentations were not observed to act as preferred nucleation spots for flux avalanches [1]. To investigate this result, we estimate the levels of electric field strengthening arising near indentations and defects, and compare with the levels necessary for triggering thermomagnetic instabilities. [less ▲]

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See detailFace description abilities predict line-up performance
Vanootighem, Valentine ULiege; Brédart, Serge ULiege; Dehon, Hedwige ULiege

Poster (2017, August 31)

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See detailPrise en charge multidisciplinaire de la douleur pelvienne chronique
BRICHANT, Géraldine ULiege; NISOLLE, Michelle ULiege

Conference (2017, August 31)

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See detailThe acoustic correlates of hypnotic voice
Remacle, Angélique ULiege; Todovora, Tatiana; Zambra, Nurihan

Poster (2017, August 31)

Although the linguistic content of hypnotic suggestions has been investigated in various studies, the paralinguistic aspects – that is, the voice used by hypnotherapists – are little described. The few ... [more ▼]

Although the linguistic content of hypnotic suggestions has been investigated in various studies, the paralinguistic aspects – that is, the voice used by hypnotherapists – are little described. The few indications concerning vocal patterns that promote a state of hypnotic trance are limited to subjective descriptions based on clinical observations, as reported in textbooks (Grinder & Bandler, 1997; James, 2010). From an empirical point of view, voice characteristics have been assessed objectively with acoustic measures in the context of muscle relaxation (Knowlton & Larkin, 2006); however, to the best of our knowledge, such measures have not been applied to identify vocal indices of the voice used to induce hypnosis. The aim of this study is to investigate the existence of a voice pattern specific to hypnosis. To that end, 32 French-speaking therapists (18 women and 14 men) who practice hypnosis in a medical or psychological context were recorded while reading a single text in two conditions: with a normal voice and with a voice used for hypnotic induction. For each of these two conditions, the following acoustic analyses were conducted with Praat software: degree of voicing (in %), mean fundamental frequency (F0, in Hz), mean sound pressure level (SPL, in dB), and variability of F0 and SPL. Statistical analyses (Wilcoxon test) show that, compared to a normal voice, a hypnotic voice presents less voicing (p<.001), lower F0 and SPL (p<.001), less SPL variability (p=.003), and a trend toward less F0 variability (p=.056). These preliminary results allow us to provide objective acoustic correlates of a hypnotic voice, such as low frequency, low intensity, monotone and lack of voicing. These acoustic characteristics correspond to the subjective voice descriptions given in textbooks, such as quiet, gentle, reassuring, and warm, which tend to create a sense of intimacy and confidentiality. Regarding the lower degree of voicing in hypnotic voices, subsequent analyses will make it possible to test the hypothesis that the voice is breathy and whispery, at least at times, and that there are longer pauses than in a normal voice. Analyses of spontaneous speech during hypnosis sessions are currently under way to test the generalizability of the results presented here. References -Grinder, J., & Bandler, R. (1997). Patterns of the hypnotic techniques of Milton H. Erickson, M.D. Vol. I. Portland, OR: Metamorphous Press. -James, U. (2010). Clinical hypnosis textbook: A guide for practical intervention (2nd ed.). Oxford, UK, New York: Radcliffe Publishing Ltd. -Knowlton, G. E., & Larkin, K. T. (2006). The influence of voice volume, pitch, and speech rate on progressive relaxation training: Application of methods from speech pathology and audiology. Applied Psychophysiology and Biofeedback, 31(2), 173–185. doi:10.1007/s10484-006-9014-6 [less ▲]

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See detailOnline ICPC-2 & Q-Codes: General Practice / Family Medicine Online Multilingual Terminology & Knowledge Base
Jamoulle, Marc ULiege

Conference (2017, August 31)

Availability of ICPC-2 and Q-Codes in URI format

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See detailAn ecological characterisation of face recognition using Game of Thrones.
Devue, Christel; Wride, A; Barsics, Catherine ULiege et al

Conference (2017, August 31)

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See detailVoice use among music theory teachers
Schiller, Isabel ULiege; Morsomme, Dominique ULiege; Sfez, Lou et al

Conference (2017, August 30)

In Belgium, there is a particular group of music teachers referred to as music theory teachers. Working at music schools, they convey theoretical knowledge and practical musical skills to groups of ... [more ▼]

In Belgium, there is a particular group of music teachers referred to as music theory teachers. Working at music schools, they convey theoretical knowledge and practical musical skills to groups of individuals who learn music during their free-time. Even though music theory teachers use both speaking and singing voice intensively at work, little is known about their voice use profiles. This study investigated the vocal loading among French-speaking music theory teachers. Objectives were (1) to describe their professional and extra-professional vocal loading, (2) to determine the relationship between vocal loading and background noise level and (3) to investigate whether objectively measured vocal loading is reflected in music theory teachers’ auto-evaluation of their voice. Using voice dosimetry, 13 music theory teachers were monitored for one workweek. Parameters analysed were F0, voice sound pressure level (SPL), phonation time, vocal loading index (VLI) and background noise SPL. At the end of each monitoring day, subjects self-assessed their voice use by means of visual analogue scales. Results revealed (1) significantly higher vocal loading in the professional context than in the extra-professional context, (2) significant positive correlations between background noise level and the parameters F0, voice SPL and phonation time and (3) significant correlations between the VLI and auto-evaluation data (e.g. voice quality and vocal fatigue). These results highlight that teaching music theory is a profession with high vocal demands. At work, music theory teachers are exposed to high background noise, which seems to influence their voice use and may potentially contribute to the development of voice problems among this population. Visual analogue scales provide a promising tool to subjectively investigate vocal loading among music theory teachers. [less ▲]

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See detailTheorising constructions of employability and processes of social disqualification towards children and parents in poverty situations, An exploration of the work of Robert Castel and Serge Paugam
Jacquet, Nicolas ULiege

in Book of abstracts 15th Annual TiSSA Conference 2017 - Olsztyn (Poland) Social Work as a Space for Dialogue, Cooperation and Diversity (2017, August 30)

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See detailIdeal future dairy farm: a Walloon breeders’ point of view
Dalcq, Anne-Catherine ULiege; Soyeurt, Hélène ULiege; Dogot, Thomas ULiege et al

Conference (2017, August 30)

This research aims to characterize the dairy breeders regarding their idea of the ideal future farm ensuring them an income, in order to highlight their present situation and the ways to advise them ... [more ▼]

This research aims to characterize the dairy breeders regarding their idea of the ideal future farm ensuring them an income, in order to highlight their present situation and the ways to advise them towards their wished dairy model. The 245 answers to a survey of breeders, conducted between November 2014 and February 2015 provided information about, amongst others, their wishes concerning the intensification, the specialization, the technological innovation, the kind of workforce, structure, market and milk production (standard vs. differentiated quality milk). Based on this information, a Multiple Correspondence Analysis allowed to create 4 groups of breeders with a similar view of their ideal farm: global-based intensive (GBIb), local-based extensive (LBEb), intermediate and no-opinion breeders. The relationships between these groups and the other recorded qualitative variables as formation needed, obstacles and advantages of breeders organization, of diversification and so forth w ere studied using Chi Square tests and Correspondence Canonical Analysis. A moderate link was observed between the ideal future farm and the current situation of the respondent. This suggested that not all the breeders were in the production system that they considered as most profitable. As a brake to the transformation and diversification, GBIb tended to be more numerous to speak about the uncertainty of the customer loyalty (p-value = 0.07) and LBEb pointed out the size of the investments (p-value = 0.05). LBEb asked more for administrative (p-value = 0.04) and transformation and diversification formations (p-value = 0.03) while GBIb looked more for finance and management formation (p-value = 0.02). In conclusion, there were different ideal dairy farm models considered by the breeders. Their needs were not similar and indicated which tools must be developed and which domain must be studied to support them. [less ▲]

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See detailEvidence-Based Practice Applied To Voice Therapy
Morsomme, Dominique ULiege

Conference (2017, August 30)

Voice therapy supports dysphonic patients. To rehabilitate the dysphonic patient, each voice therapist uses different exercises. These exercises are mostly described in books, which offer a step-by-step ... [more ▼]

Voice therapy supports dysphonic patients. To rehabilitate the dysphonic patient, each voice therapist uses different exercises. These exercises are mostly described in books, which offer a step-by-step acquisition model of the required vocal motor gesture and propose techniques of voice rehabilitation. However, the same technique can cover different therapeutic aspects. Van Stan et al. (2015) recently suggested a taxonomy to clarify therapeutic programs, detail their content and classify them according to their direct intervention category (auditory, vocal function, somatosensory, musculo-skeletal, and respiratory). Sensitize the patient to vocal hygiene, teach the basics of respiratory support, adjust the subglottal pressure, encourage vocal placement in the resonators, replace the wrong motor gesture with another healthier, controlling glottal attacks are the rehabilitation principles basics for voice disorders. All exercises are generally based on raising awareness of both inadequate and adequate vocal gesture by increasing proprioception. The final goal is that the patient gradually regains control over his vocal gesture. To ensure the best treatment to the patient, our approach must rely on the evidence based practice (EBP) principles. The questions we must ask ourselves as clinician are: Which voice techniques, for which patients, with which diagnoses, in what environments, with what effectiveness? This workshop attempts answering the question: how can a voice therapist implement EBP in his clinical practice in order to ensure the best treatment to his patient? To illustrate the process, I opted for a therapeutic approach that has been questioned: manual therapy adapted to voice therapy. I will address the notion of therapeutic efficiency of the manual therapy in the light of the scientific literature, knowing that level 1A or 1B studies on the classification of evidence levels are rare in the field of vocology (Benninger, 2011). To end the workshop, I will present short video sequences of voice therapy with three patients and their therapist who have kindly accepted to be filmed during their sessions. These sequences illustrate how manual therapy is implemented in the treatment of these patients who suffer from presbyphonia, muscle tension dysphonia and nodules respectively. [less ▲]

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See detailThe Economic Development Pole (EDP) approach in Niger: the case of the Niger-IFAD Program
Andres, Ludovic ULiege; Populin, Martha; Bodé, Sambo et al

Poster (2017, August 29)

Since 2012, the Niger-IFAD Programme uses a new non-administrative geographical intervention unit, the Economic Development Pole (EDP). The EDP is described as a space concentrating economic activities ... [more ▼]

Since 2012, the Niger-IFAD Programme uses a new non-administrative geographical intervention unit, the Economic Development Pole (EDP). The EDP is described as a space concentrating economic activities linked to the production and commercialization of the main agro-pastoral products of the neighbouring production basins. This poster aims to describe and analyze the concept of EDP, to show its first results when put into practice and to analyze its risks. [less ▲]

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See detailGiving an account of fictional discourse. Meinongian logics versus modal logics
Leclercq, Bruno ULiege

Conference (2017, August 29)

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See detailMultiple Uses of a 3D Point Cloud: the Castle of Franchimont (Province of Liège, Belgium)
Luczfalvy Jancsó, Andrea ULiege; Jonlet, Benoît ULiege; Hallot, Pierre ULiege et al

Poster (2017, August 29)

This poster presents the identified obstacles, needs and selected solution for the study of the medieval castle of Franchimont, located in the province of Liège (Belgium). After taking into account the ... [more ▼]

This poster presents the identified obstacles, needs and selected solution for the study of the medieval castle of Franchimont, located in the province of Liège (Belgium). After taking into account the requirements from all the disciplines at work as well as the problems that would have to be tackled, the creation of a 3D point cloud was decided. This solution would be able to deal with the characteristics and needs of a research involving building archaeology and related fields. The decision was made in order to manage all of the available data and to provide a common working tool for every involved cultural heritage actor. [less ▲]

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See detailA case of uterine hematoma in a mare after an endometrial biopsy
Parrilla Hernandez, Sonia ULiege; Reignier, Fabrice; Barrière, Philippe et al

Poster (2017, August 26)

Endometrial biopsy is an important, safe and painless procedure to assess equine uterine health. While minor bleeding at the site of sampling is a common condition, uterine hematoma is a rare complication ... [more ▼]

Endometrial biopsy is an important, safe and painless procedure to assess equine uterine health. While minor bleeding at the site of sampling is a common condition, uterine hematoma is a rare complication. An endometrial biopsy was routinely performed on an unsedated 17 year-old welsh pony mare in estrus during a research protocol. From the next day on and during the following 7 days, a large amount of sanguineous fluid was observed in the uterine cavity during the daily ultrasound examination performed according with the protocol. No fever or any other systemic symptoms were noticed. Two weeks later, the ultrasound examination revealed an organised hyperechogenic mass compatible with a hematoma within the endometrial lumen. The mare was regularly controlled during the rest of the breeding season and no abnormalities in her cyclicity were observed. The size of the hematoma only began to decrease from the 3rd month after the biopsy onward and it disappeared completely 2 months later. This was the only complication following a biopsy in this study protocol that included a total of 70 biopsies on 49 mares and the very first case the authors got to see while biopsies have been common practice in their clinical and research activities for years. To our knowledge, this is the first time that the appearance of this condition is documented. The hematoma took 5 months to disappear at the ultrasound examination. During this time the mare could not be bred. Therefore, while endometrial biopsy should still be regarded as a safe procedure for the diagnosis of infertility in mares, the potential risk of a hematoma with its consequences for the breeding season has to be considered. [less ▲]

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See detailFragmentation index of DNA sperm in llama semen (Lama glama)
Cucho, Hernan; Ordonez, Cesar; Ampuero, Enrique et al

Poster (2017, August 25)

DNA fragmentation of spermatozoa is an important indicator of seminal quality and fertility. The quality of the genetic information contained in the DNA molecule transmitted by the spermatozoa is ... [more ▼]

DNA fragmentation of spermatozoa is an important indicator of seminal quality and fertility. The quality of the genetic information contained in the DNA molecule transmitted by the spermatozoa is important for the proper development of the embryo. In humans it has been shown that there is a significant correlation between sperm DNA damage and oocyte fertilization, embryo quality, development to blastocyst and embryo implantation. The objective of this study was to analyze the fragmentation of DNA sperm in llama semen collected by post-copulation vaginal aspiration. The collection of 4 llamas was performed on three occasions per animal. The volume, motility, concentration, vitality, sperm membrane functionality assessed with the Integrated Semen Analysis System - ISAS®. The DNA fragmentation index was tested with the Halomax system ®(Halotech company). Volume, motility, vitality and sperm concentration respectively were 1.3 ± 0.8 ml, 12.30 ± 2.02%; 64.69 ± 11.39% and 183.55 ± 28.48 x 106 spz/ml. The functionality of the sperm membrane was 64.95 ± 11.63% and sperm DNA fragmentation index 11.58 ± 13.25%. The values of these different parameters indicate the high quality of the collected semen. [less ▲]

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See detailPrésentation de la thématique de recherche et du programme de la journée
Simons, Germain ULiege

Conference (2017, August 25)

Dans cette introduction, G. Simons montre comment la notion de "tâche complexe" s'est construite progressivement en Communauté française de Belgique depuis le Décret "Missions". Ensuite il propose ... [more ▼]

Dans cette introduction, G. Simons montre comment la notion de "tâche complexe" s'est construite progressivement en Communauté française de Belgique depuis le Décret "Missions". Ensuite il propose différentes questions qui baliseront la réflexion tout au long de la journée. Enfin, il présente le programme du colloque et remercie toutes les personnes qui ont contribué à son organisation. [less ▲]

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See detailUniversité d'été du CIFEN - Atelier 2 :Tâches complexes dans les formations professionnalisantes
Francois, Nathalie ULiege; Simons, Germain ULiege

Conference (2017, August 25)

Introduction et synthèse de l'atelier consacré aux tâches complexes dans les sections professionnalisantes de différents niveaux d'enseignement en Fédération Wallonie Bruxelles.

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Peer Reviewed
See detailVariation of tree allometry and aboveground biomass in central African forests
Loubota Panzou, Grâce Jopaul ULiege; Ligot, Gauthier ULiege; Bastin, Jean-François et al

Conference (2017, August 23)

Quantifying the biomass and carbon stocks contained in tropical forests has become an international priority for the implementation of the REDD+ initiative. Many techniques exist to estimate forest ... [more ▼]

Quantifying the biomass and carbon stocks contained in tropical forests has become an international priority for the implementation of the REDD+ initiative. Many techniques exist to estimate forest biomass at different spatial scales, but all ultimately rely on allometric equations calibrated on destructive measurements of individual tree biomass, in order to convert forest inventory data into biomass estimates. For many tropical forest ecosystems, that are structurally complex and species rich, these allometric equations have not yet been developed and general allometric equations are being used instead, with possibly local adjustment of tree allometry with non-destructive data. Variation in height-diameter allometry and in crown-diameter allometry across forest types and environmental conditions have been demonstrated to be of extreme importance for the estimation of biomass and carbon stocks in tropical forests, but yet poorly explored in central Africa. In this study we aimed to determine the variation in tree height-diameter and crown-diameter allometries across central African forests and the consequences for biomass and carbon stocks. Tree allometry data were collected in two of semi-deciduous forest sites in northern Republic of Congo that have vastly different substrate and soils (clay soils on quartzite and sandy soils on sandstone plateau), and forest communities, but similar rainfall regimes. These data will be analyzed to test two hypotheses: (i) tree allometry strongly varies across forest types with contrasted environmental conditions (and specifically soils), and (ii) both allometry and forest structure contributed to the greater biomass of the site on rich soil (quartzite substrate). Our newly collected data for two sites in northern Congo will be confronted to existing allometry and inventory data available elsewhere in the Congo basin to get a broader picture of allometric variations and its consequences for the estimation of biomass and carbon stocks. [less ▲]

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See detailVideo and camera traps to investigate animal ecophysiology and enhance wildlife management: case study on bees and elephants interactions in Gabon.
Ngama, Steeve ULiege; Bindelle, Jérôme ULiege; Vermeulen, Cédric ULiege

Conference (2017, August 23)

Crops are often sources of conflict between humans and wildlife. Wildlife damage to crops can drastically reduce income, amplifying poverty and creating a negative perception of wild animal conservation ... [more ▼]

Crops are often sources of conflict between humans and wildlife. Wildlife damage to crops can drastically reduce income, amplifying poverty and creating a negative perception of wild animal conservation among rural people. In this context, crop-raiding animals like elephants quickly become “problem animals”. To deter elephants from raiding crops beehives have been successfully employed in East Africa while providing honey for the farmers. Whether such a technique could work on forest elephants (Loxodonta Africana cyclotis) in Central Africa is still unknown. An ecophysiology-based trial consisting on bees and elephants interactions assessment was conducted in Gabon. It aimed to evaluate whether the presence of Apis mellifera adansonii, the African honey bee species present in Central Africa, deters forest elephants from feeding on experimental wild fruit trees. We suspected that bee physiology matters on bee defensive behavior and monitoring it through measuring bee activities can help better understand bees and elephants interactions. For this purpose video cameras were used to record activities of bees in fourteen beehives hung on seven wild trees (4 Irvingia gabonensis and 3 Sacoglottis gabonensis trees) each equipped with a camera trap to record elephants feeding behaviors on those trees. This experimental apparatus was monitored during 70 consecutive weeks from 2012 to 2013. We captured 8151 photos representing 4h31min42s of time spent by elephants at experimental trees and more than 75 videos of bees activities from where we extracted genuine results. Our results show a significant correlation between the effectiveness of beehives as deterrents of elephants and bee activity. Although elephant disturbance of hives does not inhibit honey production, there is a tradeoff between deterrence and the quantity of honey produced. More interestingly, to best achieve the dual goals of deterring elephants and producing honey colonies must maintain an optimum activity level of 40 to 60 bee movements per minute. Thus Apis mellifera adansonii bees can effectively deter elephants but beehives must be actively managed to maintain bees’ colonies at the optimum activity level. [less ▲]

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See detailWell-defined polyvinylamine-based copolymers: synthesis by organometallic-mediated radical polymerization and use in gene transfection
Debuigne, Antoine ULiege; Dréan, Mathilde; Detrembleur, Christophe ULiege et al

Conference (2017, August 22)

Polyvinylamine (PVAm) presents valuable properties like affinity for many supports, pH responsiveness, metal binding capacity, polyelectrolytes complexation, and is used in various applications including ... [more ▼]

Polyvinylamine (PVAm) presents valuable properties like affinity for many supports, pH responsiveness, metal binding capacity, polyelectrolytes complexation, and is used in various applications including coatings, water purification or gas membrane separation. PVAm is commonly prepared by free radical polymerization of N-vinyl monomers followed by deprotection and release of the masked amino functions. However, examples of controlled synthesis of polyvinylamine-based copolymers are scarce because of the high reactivity of the propagating radicals deriving from non-conjugated N-vinyl monomers due to the lack of resonance stabilization. The present communication aims at reporting an efficient platform for producing tailor-made PVAms via organometallic-mediated radical polymerization (OMRP) of N-vinylacetamides followed by hydrolysis of the pendent amide moieties. In this case, cobalt(II) acetylacetonate was successfully used as controlling agent. The synthesis of a series of well-defined homopolymers, statistical and block copolymers with pendent primary and/or secondary amines having low dispersities, predictable molar masses and precise compositions, will be described. Finally, we will discuss the possible use of these polyvinylamine-containing copolymers as gene transfection agents. Some of them demonstrated high DNA transfection level in combination with high cell viability. [less ▲]

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See detailGroundless altruism: Why it makes sense to risk one's life for other people's money
Dumitru, Magdalena ULiege; Joergensen, Gitte

Conference (2017, August 22)

In a study where participants were asked to make a series of assessments in distinct circumstances, we show that altruistic agents may incur disadvantages in the name of values they do not believe in (i.e ... [more ▼]

In a study where participants were asked to make a series of assessments in distinct circumstances, we show that altruistic agents may incur disadvantages in the name of values they do not believe in (i.e., saving money) as long as they believe in the overarching category (e.g., it is a ‘good deed’ to recover other people’s money). Whereas previous research mostly targeted ultimate benefits (i.e., whether or not altruistic agents incur real disadvantages), the axiological basis of altruistic acts (i.e., whether or not they have the same worth to self and to others) has remained unchallenged. Here, we explored “groundless altruism” by asking participants to rate their agreement with the statement ‘Money is worth risking my life for’ before and after presenting them with an altruistic scenario. There was a dramatic increase in the proportion of ‘yes’ responses from the first to the second rating. Moreover, as predicted by the cultural group selection theory, the status of the agent (low-rank police employee v s. secret agent) was largely irrelevant. These findings suggest that social constructs such as categorisation have the potential to significantly influence human behaviour in various domains from moral psychology to work ethics to language learning. [less ▲]

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See detailGestion de la biodiversité
Monty, Arnaud ULiege

Conference (2017, August 21)

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Peer Reviewed
See detailNarrative Misappropriations of Pokémon: How Fanarts and Fanfictions Playfully Feed and Reconfigure a Transmedia Universe
Barnabé, Fanny ULiege

Conference (2017, August 21)

As defined by Jenkins (2006), transmedia storytelling is intimately linked with creative practices of reception which take part in what we now call the “participatory culture” (Raessens, 2005; Jenkins ... [more ▼]

As defined by Jenkins (2006), transmedia storytelling is intimately linked with creative practices of reception which take part in what we now call the “participatory culture” (Raessens, 2005; Jenkins, 1992 and 2009). The audience plays, indeed, a key role in the construction of transmedia universes, given that “to fully experience any fictional world, consumers must assume the role of hunters and gatherers, chasing down bits of the story across media channels, comparing notes with each other via online discussion groups, and collaborating to ensure that everyone who invests time and effort will come away with a richer entertainment experience” (Jenkins, 2006: 21). Consequently, studying a media – in this case, the video game – through the lens of transmedia storytelling urges one to take into consideration how the public can participate, feed, or transform fictions by consuming them. Furthermore, in the field of game studies, it is all the more relevant to deal with the implication of players in the creative process since video games are historically and structurally related to the practice of misappropriation or detournement. As Genvo notes: “the creation of the first video game [Spacewar, 1962] already resulted from a playful act, which was expressed by the misuse of the conventional function of an MIT’s super calculator” (Genvo, 2008: 2). This original affinity now appears in a number of creative practices that prolong the game outside its primary space and enable it to seep into other medias: as fanfictions, modding or machinimas show, the video game is regularly apprehended by players not as a closed work to consume, but “more as [a] suit[e] of resources to be played with” (Newman, 2012: 123). This paper therefore seeks to study the impact of players’ misappropriations on the development of video games' fictional worlds. In this perspective, I will focus on a deeply transmedia license, the Pokémon saga, and on two creative practices that reconfigure games’ universes: fanarts and fanfictions. While amateur drawings and comics inspired by Pokémon GO have created narrative extensions from scratch about the barely characterized Team Leaders (Blanche, Candela and Spark), fan-authors have written thousands of texts that play with elements of the Pokémon universe in order to produce original stories. Yet, these textual and pictorial rewritings do not merely reuse narrative elements of Pokémon games; they also feature strictly playful components such as gameplay, glitches or actions like saving and reloading, which then become new types of narrative motifs. Fanfictions and fanarts thus construct – like the games they extend – hybrid fictions, mixing storytelling and gaming logic: in Amato’s words, “ludiegesis” (Amato, 2005 : 301). Using theoretical tools from narratology and from game studies, I will show that, by reincorporating playful aspects in their narrative structures, these derivative works hold a reflexive discourse on the original game that cannot be reduced to a binary opposition between “adhesion” and “subversion”, but which builds a whole new stratum of fiction. [less ▲]

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