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See detailL’institution de la contre-culture
Saint-Amand, Denis ULg

Conference (2015, October)

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See detailQuelle définition du concept de tangente ? Pour quelles raisons ?
Balhan, Kevin ULg; Krysinska, Marysa; Schneider-Gilot, Marguerite ULg

in Repères : Revue des Instituts de Recherche sur l'Enseignement des Mathématiques (2015), 101(Octobre 2015), 5-32

Dans le présent article, nous présentons un parcours didactique visant à faire évoluer chez les élèves le concept de tangente, de leur connaissance antérieure de tangente à un cercle comme droite ne ... [more ▼]

Dans le présent article, nous présentons un parcours didactique visant à faire évoluer chez les élèves le concept de tangente, de leur connaissance antérieure de tangente à un cercle comme droite ne coupant la courbe qu’en un seul point jusqu’à une définition formalisée au sein d’un cours d’analyse. Nous montrons ainsi qu’une définition d’un objet mathématique n’est ni définitive, ni une simple description de l’objet. Le choix d’une définition au détriment d’une autre doit se faire à la lumière d’un projet plus global relatif à l’institution à laquelle elle appartient. [less ▲]

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See detailAnthropogenic particles in stomachs of anchovies (Engraulis encrasicolus) related to gill rakers morphology
Collard, France ULg; Das, Krishna ULg; Gilbert, Bernard ULg et al

in Proceedings of In the Wake of Plastics, Venice, October 13-15, 2015 (2015, October)

Anthropogenic debris (AB) contaminate oceans and affect marine organisms in several ways. Plastic production is constantly increasing and it is estimated that 10% of this production end in the seas. As a ... [more ▼]

Anthropogenic debris (AB) contaminate oceans and affect marine organisms in several ways. Plastic production is constantly increasing and it is estimated that 10% of this production end in the seas. As a consequence, plastic is considered as an emerging contaminant and ingestions by organisms are increasingly reported. Microdebris (< 5mm) are available for a high range of organisms, including planktivorous fish, such as the European anchovy (Engraulis encrasicolus). Planktivorous fish have a particular gill basket, with long and tight gill rakers, related to their diet. Upon these gill rakers, small structures called denticles are present. These gill rakers act as a net to trap organic particles and AB. The aim of our study was to correlate sizes of AB ingested with the mesh constituted by the gill rakers and associated structures. Fifteen stomach contents were analyzed by Raman spectroscopy and particles were measured. Five gill arches were observed with a scanning electron microscope. Cellulose fibers and microplastics were the most AB ingested. Comparing to other Clupeiformes (pilchard and Atlantic herring), anchovies have more denticles on each gill rakers (personal data). AB ingestion by fish is poorly studied and impacts of AB are not much understood. Clupeiformes play a major role in marine ecosystems and is the most consumed order by humans. As the branchial basket constitutes a food selective apparatus, more morphological studies dealing with AB ingestion on Clupeiformes are needed. [less ▲]

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See detailCanine idopathic pulmonary fibrosis is not associated with herpes virus infection
Roels, Elodie ULg; Dourcy, Mickael ULg; Holopainen, S. et al

Poster (2015, October)

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See detailValorisation de la biomasse pour des applications vers des marchés de niche
Richel, Aurore ULg

Conference (2015, October)

Dans le contexte économique actuel de notre société, il est reconnu que des alternatives et des compléments à la pétrochimie devront être développés dans un futur proche. L’une des solutions possibles ... [more ▼]

Dans le contexte économique actuel de notre société, il est reconnu que des alternatives et des compléments à la pétrochimie devront être développés dans un futur proche. L’une des solutions possibles réside dans le développement de procédés permettant de substituer les actuels produits pétro-sourcés par de nouveaux matériaux bio-basés issus de la biomasse. Sur base de ce constat, Gembloux Agro-Bio Tech et son laboratoire de Chimie Biologique Industrielle se positionnent sur cette thématique en abordant les aspects technico-économiques de transformation du végétal en une gamme de produits à haute valeur ajoutée à destination de divers secteurs applicatifs tels que les matériaux, le cosmétique, le pharmaceutique, etc. L'importance de l'agronomie et des techniques agricoles, combinée à une gestion appropriée des déchets en circuits courts, sont deux piliers discutés dans ce exposé et illustrés au travers de divers exemples stratégiques. [less ▲]

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See detailPotential damping of extreme floods in the river Meuse between Ampsin (B) and the Belgian-Dutch border
Bruwier, Martin ULg; Archambeau, Pierre ULg; Erpicum, Sébastien ULg et al

in Lenders, H.J.R.; Collas, F.P.L.; Geerling, G.W. (Eds.) et al Bridging gaps between river science, governance and management. Book of Abstracts NCR-Days 2015 (2015, October)

In the framework of the Interreg IVB project AMICE, hydraulic modelling of floods in the river Meuse was performed by coordinating existing models (Dewals et al. 2012a). The influence of climate change ... [more ▼]

In the framework of the Interreg IVB project AMICE, hydraulic modelling of floods in the river Meuse was performed by coordinating existing models (Dewals et al. 2012a). The influence of climate change scenarios was incorporated indirectly in the simulations through a transnational hydrological scenario (Drogue et al. 2010; Dewals et al. 2013). For a “wet” future climate, this scenario assumes that the peak discharge Q100 of the 100-year flood would increase by 15 % for the time horizon 2021-2050 and by 30 % for the time horizon 2071-2100. However, the design discharge currently used for planning in the Netherlands is higher than those considered to date in the AMICE project. From this perspective, it becomes relevant to analyse flood scenarios corresponding to a peak discharge above Q100+30 %, referred to hereafter as an “extreme” flood. The aim of the study is to give an appreciation of the potential damping of one extreme flood scenario along the river Meuse between Ampsin (Belgium) and the Belgian-Dutch border (Figure 1). This analysis is based on the hydraulic model WOLF 2D (Erpicum et al. 2010) applied to a coarse grid with simplifications in the schematisation. The hydraulic model WOLF 2D has been already used in several studies to simulate floods (Ernst et al. 2010; Beckers et al. 2013, Bruwier et al. 2015, Detrembleur et al. 2015). The coarsening of the grid for simulating the extreme flood scenario is necessary to preserve the computational efficiency, since both the total flood duration and the inundation extents (hence the number of grid cells) increase considerably between the Q100 + 30 % scenario considered previously and the extreme scenario considered here. [less ▲]

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See detailL’immunisation des normes législatives par le choix du constituant
Bouhon, Frédéric ULg

in Revue de la Faculté de Droit de l'Université de Liège (2015), 2015/3

Cet article commente l'arrêt n° 81/2015 de la Cour constitutionnelle et se focalise sur la notion de 'choix du constituant' à laquelle la Cour se réfère dans cet arrêt et dans d'autres qui l'ont précédé.

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See detailCompte rendu de P. Funke, M. Haake, Greek Federal States and Their Sanctuaries
Pirenne-Delforge, Vinciane ULg

in Bryn Mawr Classical Review [=BMCR] (2015)

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See detailLes souvenirs définissant le soi dans le trouble dépressif majeur unipolaire : Pourquoi les évoquer durant l’entretien clinique ?
Wagener, Aurélie ULg; Boulanger, Marie ULg; PITCHOT, William ULg et al

in Acta Psychiatrica Belgica (2015), 116(2), 27-34

Unipolar depressed patients can experience a loss of sense of self-continuity. Self-defining memories which are particular autobiographical memories may consist in psychological interventions aiming at ... [more ▼]

Unipolar depressed patients can experience a loss of sense of self-continuity. Self-defining memories which are particular autobiographical memories may consist in psychological interventions aiming at reestablishing the sense of self-continuity. Working on self-defining memories may also help dealing with other psychological difficulties. This article presents the self-defining memories, their characteristics and different psychological interventions which aim is to enhance the quality of these memories. [less ▲]

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See detailSynthesis of aliphatic polyamide bearing fluorinated groups from ε-caprolactam and modified cyclic lysine
Tunc, Deniz; Bouchekiv, Hassen; Améduri, Bruno et al

in European Polymer Journal (2015), 71

Aliphatic polyamide (PA) bearing fluorinated groups was synthesized in bulk with perfluorobutyryl-substituted α-amino-ε-caprolactam and ε-caprolactam by anionic ring-opening polymerization (AROP). The ... [more ▼]

Aliphatic polyamide (PA) bearing fluorinated groups was synthesized in bulk with perfluorobutyryl-substituted α-amino-ε-caprolactam and ε-caprolactam by anionic ring-opening polymerization (AROP). The fluorinated monomer was obtained by condensation between cyclic lysine (i.e. α-amino-ε-caprolactam) and perfluorobutyrylchloride. The effect of the fluorinated monomer fraction onto the AROP of ε-caprolactam was monitored by the exothermicity of this polymerization versus time. The properties and characteristics of the resulting polymers were studied by with differential scanning calorimetry, thermogravimetry, magic angle spining NMR, FT-IR, and contact angle measurements. Polyamides bearing fluorinated groups exhibited better thermal stability than polyamide 6 (PA6) as well as a higher hydrophobic surface character as evidenced by surface tension measurements. The glass transition temperature of polyamide 6 was 53 °C and rose to 58 °C for a PA bearing fluorinated moieties, while fluorinated monomer insertion induced a decrease of the melting points from 216 to 198 °C. These copolymers displayed a maximum degradation temperature of 390 °C as compared to the 310 °C for PA6, and their surface energies decreased from 49.4 mN.cm-1 (PA6 value) to 44.1 mN.cm-1. [less ▲]

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See detailA three year survey of dermatophytoses in Belgium
SACHELI, Rosalie ULg; DARFOUF, Rajae ULg; GRAIDE, Hélène ULg et al

in Mycoses (2015, October), 58(Supplement 4), 135

Objectives Dermatophytosis refers to superficial fungal infections of keratinized tissues caused by keratinophilic dermatophytes. They are the most common cause of superficial fungal infections worldwide ... [more ▼]

Objectives Dermatophytosis refers to superficial fungal infections of keratinized tissues caused by keratinophilic dermatophytes. They are the most common cause of superficial fungal infections worldwide. Epidemiological studies regarding dermatophyte infections have been conducted in several countries and differences in the incidence and in etiological agents have been reported for different geographical areas. That is why national surveillance of circulating strains causing dermatophytosis is crucial. The Belgian National Reference Center (NRC) for Mycoses conducted a survey on dermatophytes strains circulating from 2012 to 2014. The present study was performed to assess the profile of dermatophytosis and to identify the species involved. Methods The Belgian NRC for Mycosis collected 9138 strains between January 2012 and December 2014. The isolates were cultured from patients clinically suspected for fungal infections of skin, hair and nails. Isolates were sent by Belgian laboratories to the two labs of the Belgian NRC (UZ Leuven and CHU of Liège) in order to identify the fungus or to confirm the identification. All isolates cultured from patients of UZ Leuven and CHU of Liège were also included. Fungal identification was performed by microscopy after subculture and in case of doubtful identifications by ITS sequencing. Results .Among the 9138 samples (results of UZ Leuven and CHU of Liège combined), 3587 were identified as dermatophytes. Trichophyton. rubrum (T. rubrum) was the most prevalent species accounting for 56,17% (n=2015) of the infections from all sources, followed by T. mentagrophytes complex (21,83%, n=783). The other main etiological agents of dermatophytosis recorded in this study in descending order of prevalence were M. audouinii (n=303), M. canis (n=120), T. violaceum (n=112), T. tonsurans (n= 95), T. soudanense (n=66), M. praecox (n=59), E. floccosum (n=14) Our data reveal the predominance of anthropophilic species causing tinea capitis especially M. audouinii responsible for 36,49% (n=163/448) of hair/scalp infection. Trichophyton violaceum rarely observed in our country is frequently found as 12,8% (n=57) of the reported cases of tinea capitis are due to this species. The retrospective evaluation of data collected also shows that zoophilic strains as M. canis well represented in the past epidemiology of tinea capitis, is decreasing in frequency accounting for only 7,2% (n=32) of clinical cases. Finally, our data confirm the high prevalence of T. rubrum commonly observed in Europe as causal agent of onychomycosis (70,9%, n=1603) followed by T. mentagrophytes complex (20,9%, n=455). T. rubrum and T. mentagrophytes complex are also responsible for the majority of skin infections as they represent respectively 40% (n=386) and 24,75% (n=239) of skin dermatophytosis during the study period. Conclusions The present work has provided recent data on the prevalence of several dermatophytes species circulating in Belgium. Such data is critical for the establishment of therapeutic strategies and measures for prevention and control of dermatophytes infections. Our study confirms the predominance of T. rubrum followed by T. mentagrophytes in the Belgian population but also highlights the emergence of new anthropophilic species such as M. audouinii and T. violaceum as causative agents of tinea capitis in children in relation with African immigration. [less ▲]

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See detailA performance indicator for structures under natural fire
Gernay, Thomas ULg; Franssen, Jean-Marc ULg

in Engineering Structures (2015), 100

Fires in buildings are characterized by a heating phase followed by a cooling phase, yet the effects of the latter on structures are not well covered in the current approaches to structural fire ... [more ▼]

Fires in buildings are characterized by a heating phase followed by a cooling phase, yet the effects of the latter on structures are not well covered in the current approaches to structural fire engineering. Indeed the actual requirement of non-occurrence of structural failure at peak temperature does not guarantee against a delayed failure during or after the cooling phase of a fire, which puts at risk the fire brigades and people proceeding to a building inspection after a fire. Therefore there is an urgent need to better comprehend and characterize the materials and structures behavior under decreasing temperatures. Sensitivity to delayed failure of a structural component depends on its typology and constituting materials. In particular, two structural components with the same Fire Resistance rating (R) under standardized fire may exhibit very distinct behavior under natural fire, one of them being more prone to delayed failure than the other. With the aim of quantifying this effect, a new indicator is proposed that characterizes the performance of structures under natural fire conditions. The paper presents the methodology to derive this new indicator as well as results for different typologies of structural components. Parametric analyses highlight the prime influence of constitutive material and thermal inertia of the element on the post-peak behavior. Used in conjunction with the Fire Resistance rating, it is shown how the new indicator carries additional and significant information for classifying structural systems in terms of their fire performance and propensity to delayed failure. [less ▲]

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See detailPre-return-to-work medical consultation for low back pain workers. Good practice recommendations based on systematic review and expert consensus
PETIT, Audrey; ROZENBERG, Sylvie; FASSIER, Jean-Baptiste et al

in Annals of Physical and Rehabilitation Medicine (2015), 58(5), 298-304

Objectives The pre-return-to-work medical consultation during sick leave for low back pain (LBP) aims at assessing the worker's ability to resume working without risk for his/her health, and anticipating ... [more ▼]

Objectives The pre-return-to-work medical consultation during sick leave for low back pain (LBP) aims at assessing the worker's ability to resume working without risk for his/her health, and anticipating any difficulties inherent to returning to work and job retention. This article summarizes the good practices guidelines proposed by the French Society of Occupational Medicine (SFMT) and the French National Health Authority (HAS), and published in October 2013. Methods Good practices guidelines developed by a multidisciplinary and independent task force (24 experts) and peer review committee (50 experts) based on a literature review from 1990 to 2012, according to the HAS methodology. Results According to the labour regulations, workers can request a medical consultation with their occupational physician at any time. The pre-return-to-work consultation precedes the effective return-to-work and can be requested by the employee regardless of their sick leave duration. It must be scheduled early enough to: (i) deliver reassuring information regarding risks to the lower back and managing LBP; (ii) evaluate prognostic factors of chronicity and prolonged disability in relations to LBP and its physical, social and occupational consequences in order to implement the necessary conditions for returning to work; (iii) support and promote staying at work by taking into account all medical, social and occupational aspects of the situation and ensure proper coordination between the different actors. Conclusion A better understanding of the pre-return-to-work consultation would improve collaboration and coordination of actions to facilitate resuming work and job retention for patients with LBP [less ▲]

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See detailPhotorefractive holographic camera for monitoring deformations of MEMS
Georges, Marc ULg; Thizy, Cédric ULg

in Journal of Micro/Nanolithography, MEMS, and MOEMS (2015), 14(4), 041301

We present the development of a holographic interferometer based on dynamic hologram recording with photorefractive crystals of the sillenite family and which is adapted for the observation of MEMS. A ... [more ▼]

We present the development of a holographic interferometer based on dynamic hologram recording with photorefractive crystals of the sillenite family and which is adapted for the observation of MEMS. A compact portable system was already presented in the past and used in various metrology and nondestructive applications on large scattering objects. It was emphasized the great versatility of the instrument which allows high resolution measurements. Here we show the development and achievement of an optical module which can be easily interfaced on the basic instrument, allowing small specular objects observation. Results of deformation of electrically actuated MEMS are shown. [less ▲]

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See detailUse of a HCV patients' education tool: the knowledge questionnaire with confidence degrees
Kerrad, Amel; Leclercq, Dieudonné ULg; Barreteau, H. et al

Poster (2015, October)

13 patiuent ssuffering of C hepatis have received a pretest on knowledge with confidence degrees accompanying their responses. On the basis of thes responses, they received individual education by a ... [more ▼]

13 patiuent ssuffering of C hepatis have received a pretest on knowledge with confidence degrees accompanying their responses. On the basis of thes responses, they received individual education by a pharmacist about their treatment. A post-test, again with confidence degrees, permitted to measure, according to methods described by Leclercq (2009), to evidence objective and subjective gains in knowledge as well in patients' adherence to treatment. [less ▲]

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