Last 7 days
Bookmark and Share    
Full Text
See detailTaphonomie et analyse des résidus sur les pièces lithiques
Cnuts, Dries ULiege; Rots, Veerle ULiege

in Brugal, Jean-Philip (Ed.) TaphonomieS (2017)

Detailed reference viewed: 24 (2 ULiège)
Full Text
See detailDidactique des langues modernes (Partim I)
Simons, Germain ULiege

Learning material (2017)

Ce syllabus est le support principal du cours de didactique des langues modernes. Outre l'introduction et la conclusion, le syllabus est articulé autour de 6 grands chapitres (voir introduction en PDF).

Detailed reference viewed: 19 (1 ULiège)
Full Text
Peer Reviewed
See detailTrauma pneumonectomy for major thoracic bleeding: when should we consider it ?
TONGLET, Martin ULiege; MOENS, Didier ULiege; D'ORIO, Vincenzo ULiege et al

in Journal of Trauma (2017)

Lettre à l'éditeur du Journal of Trauma concernant la pneumectomie totale dans le contexte d'une hémorragie thoracique incontrôlable.

Detailed reference viewed: 25 (0 ULiège)
Full Text
Peer Reviewed
See detailDevelopment, dissemination, and applications of a new terminological resource the Q-Code taxonomy for professional aspects of General Practice / Family Medicine.
Jamoulle, Marc ULiege; Resnick, Melissa; Grosjean, Julien et al

in European Journal of General Practice (2017), accepted

Abstract of Background Paper: Background: While documentation of clinical aspects of General Practice/Family Medicine (GP/FM) is assured by the International Classification of Primary Care (ICPC), there ... [more ▼]

Abstract of Background Paper: Background: While documentation of clinical aspects of General Practice/Family Medicine (GP/FM) is assured by the International Classification of Primary Care (ICPC), there is no taxonomy for the professional aspects (context and management) of GP/FM. Aim: To present the development, dissemination, applications, and resulting face validity of the Q-Codes taxonomy specifically designed to describe contextual features of GP/FM, proposed as an extension to the ICPC Development: The Q-Codes taxonomy was developed from Lamberts’ seminal idea for indexing contextual content (1987) by a multi-disciplinary team of knowledge engineers, linguists and general practitioners, through a qualitative and iterative analysis of 1702 abstracts from six GP/FM conferences using Atlas.ti software. A total of 182 concepts, called Q-codes, representing professional aspects of GP/FM, were identified and organised in a taxonomy. Dissemination: The taxonomy is published as an on-line terminological resource, using semantic web techniques and Web ontology language (OWL) (www.hetop.eu/Q). Each Q-code is identified with an Unique Resource Identifier (URI), and provided with preferred terms, formal definitions in eight languages (pt, es, en, fr, nl, ko, vi, tr) and search filters for Medline and web searches. Applications. . This taxonomy has already been used to support queries in bibliographic databases (e.g. Medline), to facilitate indexing of grey literature in GP/FM as congress abstracts, master theses, websites and as an educational tool in vocational teaching, Conclusions: The rapidly growing list of practical applications provides face-validity for the usefulness of this freely available new terminological resource. [less ▲]

Detailed reference viewed: 202 (3 ULiège)
Full Text
Peer Reviewed
See detailSound production mechanism in the boxfish Ostracion meleagris and Ostracion cubicus
Parmentier, Eric ULiege; Solagna, Laura; Bertucci, Frédéric et al

Poster (2017, October)

Detailed reference viewed: 9 (3 ULiège)
Peer Reviewed
See detailAcoustic space sharing in the hullabaloo of a coral reef in Mooreas Island, French Polynesia
Bertucci, Frédéric; Maratrat, Katy; Parmentier, Eric ULiege et al

Conference (2017, October)

The more vocal species in a community, the more complex the acoustic environment, and signals produced by marine organisms in order to communicate may interfere. Since acoustic space is a limited resource ... [more ▼]

The more vocal species in a community, the more complex the acoustic environment, and signals produced by marine organisms in order to communicate may interfere. Since acoustic space is a limited resource to be shared, selection may have favored a partitioning of the available acoustic windows both at the temporal and spectral levels. This has already been reported in insects, frogs, birds or mammals but rarely in fishes. Our study aimed to investigate sounds produced within an ichthyological community in the North Coast of Moorea Island (French Polynesia). By using passive acoustic monitoring technics, we identified a total of 38 different types of sounds, some dominating during day-time while others dominated during night-time. Over 24h, we also observed a succession of optimal sound production periods for each sound type which suggests a finer level of temporal partitioning of fish vocalizations. Finally, we further showed that acoustic features of co-occurring sound types significantly differed allowing partitioning at the spectral level too. These results demonstrate the existence of acoustic partitioning and interference avoidance in a coral reef fish community and highlight how acoustic communication might be optimized in such a biologically rich and dense environment as coral reefs. [less ▲]

Detailed reference viewed: 38 (3 ULiège)
Full Text
See detailLa neutralité du net n'est pas neutre
Gautier, Axel ULiege

in van Pottelsberghe, Bruno (Ed.) Les enjeux de l’innovation : quelles politiques ? Quelles gouvernances ? (2017)

Le principe de neutralité du net gouverne la gestion du trafic de données sur le réseau par les fournisseurs d’accès à internet (FAI) en leur imposant de traiter toutes les données de manière équivalente ... [more ▼]

Le principe de neutralité du net gouverne la gestion du trafic de données sur le réseau par les fournisseurs d’accès à internet (FAI) en leur imposant de traiter toutes les données de manière équivalente. Une des conséquences principales de la neutralité du net pour les FAI est la difficulté d’exiger des paiements de la part des fournisseurs de contenu. Les FAI se plaignent alors d’avoir à supporter seuls tout le poids des investissements dans l’infrastructure du réseau. Même si les analyses économiques ne donnent pas nécessairement droit à cette revendication, force est de constater que le principe de neutralité du net pose des problèmes en termes d’incitations à développer l’infrastructure. Ceci explique que l’on discute de plus en plus de l’opportunité d’accommoder la règle, par exemple en tolérant certaines pratiques récentes des FAI (comme l’exclusion d’applications, le ‘zero rating’ ou l’établissement de ‘voies prioritaires’). En Belgique, les FAI s’écartent relativement peu du principe de neutralité du réseau et que le réseau est, pour l’instant, correctement développé. Il n’en reste pas moins que des investissements conséquents devront rapidement être consentis pour continuer à améliorer l’infrastructure, ce qui, à entendre les FAI, pourrait nécessiter une [less ▲]

Detailed reference viewed: 18 (5 ULiège)
Full Text
Peer Reviewed
See detailAssessment of antioxidant potential of phenolic compounds fractions of Algerian Ceratonia siliqua L. pods during ripening stages
Ydjedd, Siham; Chaala, Makhlouf; Richard, Gaetan ULiege et al

in International Food Research Journal [=IFRJ] (2017), 24(5), 2041-2049

The consecutive extraction via different solvents of increasing/decreasing polarity, which allowed a pre-fractionation of the extracted compounds, is widely used as major method for extraction of ... [more ▼]

The consecutive extraction via different solvents of increasing/decreasing polarity, which allowed a pre-fractionation of the extracted compounds, is widely used as major method for extraction of polyphenols. Thus, the phenolic compounds of Ceratonia siliqua L., at unripe and ripe stages, were extracted by four solvents of increasing polarity (hexane, chloroform, ethyl acetate, and acetone/water (70:30, v/v), consecutively. The extracts were evaluated for their total phenolic and flavonoid contents, while the antioxidant capacity was assessed in vitro using DPPH radical and hydrogen peroxide (H2O2) scavenging assays. The phenolic profile has been carried out by HPLC-MS/MS. The results showed that the phenolic contents and antioxidant capacity varied with the nature of extracts and the ripening stage. The 70% aqueous acetone and the ethyl acetate extracts contained the highest phenolic and flavonoid contents, and subsequently showed a pronounced scavenging activity on DPPH and hydrogen peroxide at unripe and ripe stages. The HPLC-MS/MS allowed the identification of five free phenolic acids (gallic, syringic, cinnamic, p-coumaric and ellagic acid for the first time) and five flavonoids (apigenin, naringenin, kaempferol, quercetin rhamnoside and myricetin rhamnoside) at both ripening stages. [less ▲]

Detailed reference viewed: 22 (0 ULiège)
Full Text
Peer Reviewed
See detailWhere Ion Mobility and Molecular Dynamics Meet to Unravel the (Un)Folding Mechanisms of an Oligorotaxane Molecular Switch
Hanozin, Emeline ULiege; Mignolet, Benoît ULiege; Morsa, Denis ULiege et al

in ACS Nano (2017), 11(10), 10253-10263

At the interface between foldamers and mechanically interlocked molecules, oligorotaxanes exhibit a spring-like folded secondary structure with remarkable mechanical and physicochemical properties. Among ... [more ▼]

At the interface between foldamers and mechanically interlocked molecules, oligorotaxanes exhibit a spring-like folded secondary structure with remarkable mechanical and physicochemical properties. Among these properties, the ability of oligorotaxanes to act as molecular switches through controlled modulations of their spatial extension over (un)folding dynamics is of particular interest. The present study aims to assess and further characterize this remarkable feature in the gas phase using mass spectrometry tools. In this context, we focused on the [4]5NPR+12 oligorotaxane molecule complexed with PF6 - counterion and probed its co-conformational states as a function of the in-source-generated charge states. Data were interpreted in light of electronic secondary structure computations at the PM6 and DFT levels. Our results highlight two major co-conformational groups associated either with folded compact structures, notably stabilized by intramolecular π-π interactions and predominant for low charge states or with fully stretched structures resulting from significant Coulombic repulsions at high charge states. Between, the oligorotaxane adopts intermediate folded co-conformations, suggesting a stepwise unfolding pathway under increasing repulsive Coulombic constraints. The reversibility of this superstructural transition was next interrogated under electron-driven (nondissociative electron transfer) and heat-driven (collision-induced unfolding) activation stimuli. The outcomes support the feasibility to either unfold or (partially) refold the oligorotaxane foldamer on purpose in the gas phase. Our results show that the balance between the stabilizing π-π interactions and the versatile Coulomb interactions dictates the elongation state of the foldamer in the gas phase and emphasizes the adequacy of mass spectrometry tools for the superstructural characterization of desolvated prototypical artificial molecular machines. © 2017 American Chemical Society. [less ▲]

Detailed reference viewed: 16 (16 ULiège)
Full Text
See detailNonlinear asteroseismology: insight from amplitude and frequency modulations of oscillation modes in compact pulsators from Kepler photometry
Zong, Weikai; Charpinet, Stéphane; Vauclair, Gérard et al

in EPJ Web of Conferences (2017, October), 160

Nonlinear mode interactions are difficult to observe from ground-based telescopes as the typical periods of the modulations induced by those nonlinear phenomena are on timescales of weeks, months, even ... [more ▼]

Nonlinear mode interactions are difficult to observe from ground-based telescopes as the typical periods of the modulations induced by those nonlinear phenomena are on timescales of weeks, months, even years. The launch of space telescopes, e.g., Kepler, has tremendously changed the situation and shredded new light on this research field. We present results from Kepler photometry showing evidence that nonlinear interactions between modes occur in the two compact pulsators KIC 8626021, a DB white dwarf, and KIC 10139564, a short period hot B subdwarf. KIC 8626021 and KIC 10139564 had been monitored by Kepler in short-cadence for nearly two years and more than three years without interruption, respectively. By analyzing these high-quality photometric data, we found that the modes within the triplets induced by rotation clearly reveal different behaviors: their frequencies and amplitudes may exhibit either periodic or irregular modulations, or remain constant. These various behaviors of the amplitude and of the frequency modulations of the oscillation modes observed in these two stars are in good agreement with those predicted within the amplitude equation formalism in the case of the nonlinear resonant mode coupling mechanism. [less ▲]

Detailed reference viewed: 4 (4 ULiège)
See detailQuand la couronne de France fait son marché à Anvers
Fagnart, Laure ULiege

in François Ier et l'art des Pays-Bas. Musée du Louvre (2017)

La place de l'art flamand dans les collections royales françaises constitue un volet important des relations entre François Ier et les productions artistiques du Nord.

Detailed reference viewed: 4 (2 ULiège)
See detailTableaux, livres, tapisseries. Les chefs d’œuvre nordiques
Fagnart, Laure ULiege

in François Ier et l'art des Pays-Bas. Musée du Louvre (2017)

Detailed reference viewed: 5 (1 ULiège)
Full Text
Peer Reviewed
See detail3D Point Clouds in Archaeology: Advances in Acquisition, Processing and Knowledge Integration Applied to Quasi-Planar Objects
Poux, Florent ULiege; Neuville, Romain ULiege; Van Wersch, Line ULiege et al

in Geosciences (2017), 7(4), 96

Digital investigations of the real world through point clouds and derivatives are changing how curators, cultural heritage researchers and archaeologists work and collaborate. To progressively aggregate ... [more ▼]

Digital investigations of the real world through point clouds and derivatives are changing how curators, cultural heritage researchers and archaeologists work and collaborate. To progressively aggregate expertise and enhance the working proficiency of all professionals, virtual reconstructions demand adapted tools to facilitate knowledge dissemination. However, to achieve this perceptive level, a point cloud must be semantically rich, retaining relevant information for the end user. In this paper, we review the state of the art of point cloud integration within archaeological applications, giving an overview of 3D technologies for heritage, digital exploitation and case studies showing the assimilation status within 3D GIS. Identified issues and new perspectives are addressed through a knowledge-based point cloud processing framework for multi-sensory data, and illustrated on mosaics and quasi-planar objects. A new acquisition, pre-processing, segmentation and ontology-based classification method on hybrid point clouds from both terrestrial laser scanning and dense image matching is proposed to enable reasoning for information extraction. Experiments in detection and semantic enrichment show promising results of 94% correct semantization. Then, we integrate the metadata in an archaeological smart point cloud data structure allowing spatio-semantic queries related to CIDOC-CRM. Finally, a WebGL prototype is presented that leads to efficient communication between actors by proposing optimal 3D data visualizations as a basis on which interaction can grow. [less ▲]

Detailed reference viewed: 47 (12 ULiège)
See detailLes voix des "maladies rares" en Belgique : enquête multi-située sur les dynamiques de (re)connaissance d'une catégorie multiple
Duysens, Fanny ULiege

Conference (2017, September 29)

Les "maladies rares" se définissent par un taux de prévalence inférieur à 1 personne sur 2000 en Europe, ainsi que par un ensemble de situations et de problématiques caractéristiques que rencontrent les ... [more ▼]

Les "maladies rares" se définissent par un taux de prévalence inférieur à 1 personne sur 2000 en Europe, ainsi que par un ensemble de situations et de problématiques caractéristiques que rencontrent les patients et les proches concernés. Mais si la catégorie est aujourd'hui largement répandue à travers le monde, les sens qui lui sont donnés et les usages locaux dont elle fait l'objet n'ont rien d’évident. A partir d'une enquête ethnographique multi-située menée dans le contexte de la Belgique, cette recherche doctorale (2015-2018) étudie les processus de construction et de mobilisation de la catégorie de "maladies rares". Il s'agit de "suivre la catégorie" (Marcus, 1995) sur de multiples sites publics et intimes, individuels et collectifs, locaux et globaux, afin d'observer les représentations, les activités et les rapports entre diverses parties-prenantes : des associations de patients et de proches, des spécialistes scientifiques, médicaux et paramédicaux, et des acteurs de santé publique. Comment certaines formes de mobilisations des parties-prenantes observées sur le terrain belge permettent-elles de maintenir, d'étendre ou de modifier la catégorie de "maladies rares" en vue de (re)connaître celle-ci ? Le texte (working paper) qui a été discuté lors de l'atelier doctoral développait une partie du cadre d'analyse de la recherche. [less ▲]

Detailed reference viewed: 29 (2 ULiège)
Full Text
See detailEffect of different crop residue management on soil hydraulic properties - a study in a silt loam soil in Belgium
Parvin, Nargish ULiege

Doctoral thesis (2017)

In recent decades, agriculture is challenged to develop strategies for sustainability which conserve non-renewable natural resources such as soil. Soil improving conservation systems aim at improving soil ... [more ▼]

In recent decades, agriculture is challenged to develop strategies for sustainability which conserve non-renewable natural resources such as soil. Soil improving conservation systems aim at improving soil functions and at the same time ensuring high productivity. Such soil management systems have to be adapted to climate and soil specific conditions, and may include reduced tillage, balanced crop rotation, retention of crop residues, cover crops, and appropriate timing of field operations. Changes in soil functions have huge impacts on environmental flows like hydrology, crop production, solute transfer, and CO2 emission at macroscale. Soil structure is considered as one of the key factors for soil functioning. The effect of different land management on soil structure and consequently on soil hydrodynamics is not fully understood and still under investigation. The main aim of this thesis was to evaluate the effect of crop residue management on soil structure by measuring soil hydraulic properties in pedon and core scale. The agronomic context was different crop residue management in a reduced tillage system. The experimental field is named as Solresidus located in Gembloux, Belgium. Since 2008, the field has been under conservation system. Different residue management includes reduced tillage with incorporation of crop residues (RT-in) and without incorporation (RT-out). A large part of this thesis was methodological development to obtain accurate results from experimentations. Many studies have been made and documented in literature to develop indirect methods to predict soil hydrology from soil water retention curve (SWRC). There is no measuring device available which can determine the SWRC over the entire soil moisture range. Therefore, one of the methodological developments was to obtain complete SWRC by combining three different methods in core scale: X-ray computed microtomography (X-ray CT), HYPROP evaporation and Richards pressure plate method to obtain the entire SWRC. The combination of these methods found well justified to obtain the accurate and complete SWRC. Saturated hydraulic conductivity (Ks), specific connectivity (SC) of soil pores and bulk density of the soil were also measured in core and pore scale. There were soil moisture sensors (capacitance sensors) in the field to observe the soil moisture dynamics in pedon scale. Another important methodological development was to obtain the calibration results with the moisture sensor according to the soil texture and horizons. Calibration results found quite satisfying to get the accurate moisture content of the field; it was also noticed that it could be over estimation of soil moisture without the calibration. Significantly, average higher moisture content was observed by the moisture sensors in RT-in than RT-out during the canopy formation to harvest of winter wheat in 2014. The SWRCs also showed that plant available water content was higher in RT-in than RT-out. SC of soil pores was also significantly higher at the surface soil of RT-in than RT-out. RT-in found to have significant positive effects on soil structure by reducing bulk density, increasing SC, Ks and retention of soil moisture during the observation period of this study. Crop yield was marginally higher and organic matter content was significantly higher in RT-in than RT-out (results from close collaboration). Therefore, reduced tillage with residues incorporation found to have better soil hydraulics together with better crop yield than reduced tillage without incorporation of crop residues. [less ▲]

Detailed reference viewed: 42 (4 ULiège)
Full Text
See detailValorisation des sous-produits de la graine de Jatropha curcas L. en production de poulets au Sénégal
Nesseim, Thierry ULiege

Doctoral thesis (2017)

This study evaluated the effects of Jatropha curcas kernel meal incorporated in poultry feed in Senegal. All experimentations were conducted in the experimental station of the National Superior School of ... [more ▼]

This study evaluated the effects of Jatropha curcas kernel meal incorporated in poultry feed in Senegal. All experimentations were conducted in the experimental station of the National Superior School of Agriculture (ENSA) of Thies University (Senegal). In the same way, all chemical analyses were performed in the feed science laboratory of the Department of Animal Production of ENSA. The first part of this study was a description of toxic and anti-nutritional compounds present in J. curcas seed meal, which most important are phorbol esters, characteristics of Euphorbiaceae, known for its inflammatory effects, and curcin, a toxalbumin which manifested by an irritant action. Other compounds, also present, interfere more or less with digestive process in animals. Different treatments were applied, with different levels of success, to reduce or eliminate these toxic and anti-nutritional compounds for the valuation of this meal in animal feed. A particular emphasis was placed on the biological treatment, not only for a significant reduction of these compounds but also to improve the nutritional quality of the meal. The second part of this work has focused on the study of the effect of the J. curcas kernel meal obtained by chemical de-oiling, incorporated in corn at 4, 8, and 12% and distributed to broiler chickens at the end their growth phase to assess their feed intake, their daily weight gain and diet digestibility. For all diets, feed intake was inversely influenced by the incorporation on the jatropha kernel meal, leading a weight gain decrease in animals that received the largest amounts of jatropha despite the absence of toxicity signs and mortality. Similarly, the apparent digestibility of each nutrient has been affected by the incorporation of jatropha kernel meal as well as the differential digestibility thereof. The low digestibility, especially protein was explained by the low availability of meal proteins incorporated corn, but also the presence of anti-nutritional and toxic factors still present in the diets used. The third part of this work has presented results of two experimentations conducted successively. The first one studied the effect of jatropha kernel meal obtained by a chemical de-oiling, incorporated in diets at 4 and 8%, on broiler chickens performance during growing/finishing. The second experimentation studied the effect of the same cake that was heat treated before incorporated in diets at 8%, on day-old broiler chicks’ performance. In one as the other experimentation, feed intake and daily weight gain were affected by the incorporation of jatropha kernel meal. It was the same for the total mortality rates recorded despite the absence of visible signs of toxicity. These experimentations confirmed other experimentations have shown that the de-oiling of jatropha kernel meal followed by heat treatment, even if it caused a significant reduction of anti-nutritional compounds, did not remove all the toxic factors that may even interfere with feed intake and weight gain of animals. These observations were not confirmed in the fourth part, which studied the effects of jatropha kernel meal obtained by chemical de-oiling, subject to heat treatment then biological treatment with Aspergillus niger and incorporated in diets at 8%, on day-old broiler chicks performance. Indeed, the feed intake, the weight gain as well as the viability of animals were not affected by the incorporation of jatropha. These successive studies were among the first which interested the same animal species at different levels of development based on a product whose nutritional quality is proven, but has toxic and anti-nutritional factors could not be completely eliminated despite different treatments applied. The application of heat treatment may have helped to reduce some anti-nutritional compounds (curcin and trypsin inhibitor) but without improve feed intake and weight gain. Considering the reaction of animals subjected to diet, biological and heat treatments may have reduced the toxicity of jatropha kernel meal, which has afected the feed intake of animals and thus the weight gain. This study showed that, despite its nutritional level, J. curcas kernel meal presented limitations in its use as a raw material that can integrate a ration for broilers in Senegal but hopes remain with biological treatments. [less ▲]

Detailed reference viewed: 41 (1 ULiège)
Full Text
See detailLe cinéma déboussolé
Pieron, Julien ULiege

Conference (2017, September 29)

Detailed reference viewed: 19 (0 ULiège)