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See detailNote synthétique sur l'évaluation et le calcul de la vulnérabilité des ménages au Niger : février 2011
Andres, Ludovic ULg; Lebailly, Philippe ULg

Report (2011)

L’analyse de la vulnérabilité alimentaire suscite une attention toute particulière des bailleurs de fond. En effet, depuis 1990, l’analyse et l’évaluation de celle-ci permet aux différentes institutions ... [more ▼]

L’analyse de la vulnérabilité alimentaire suscite une attention toute particulière des bailleurs de fond. En effet, depuis 1990, l’analyse et l’évaluation de celle-ci permet aux différentes institutions nationales et internationales présentes au Niger d’élaborer leurs stratégies, de cibler les populations ou zones bénéficiaires de leurs interventions ainsi que de prévenir et gérer les crises alimentaires. Cependant, les nombreuses crises alimentaires chroniques du Niger (1996-1997, 2001, 2004-2005, 2009-2010) suscitent néanmoins un certain questionnement quant à l’efficacité et l’efficience de cette évaluation. Cette note décrira certaines méthodologies d’évaluation de la vulnérabilité alimentaire les plus usitées au Niger. Au total, trois méthodologies ont été caractérisées, celle de la Cellule de Coordination du Système d’Alerte Précoce (CC/SAP), de certains Partenaires Techniques et Financiers (Save The Children, Action Contre la Faim, …) et du CC/SAP et de l’Institut National de la Statistique du Niger (INS-Niger). Cette description permettra de mieux cerner les spécificités de chacune d’elles et d’élaborer certaines remarques et recommandations. Ce document introduira, tout d’abord, le concept de vulnérabilité repris dans la littérature. Ensuite, il décrira les différentes méthodologies de calcul et d’évaluation de la vulnérabilité utilisées au Niger. Enfin, ces méthodologies seront analysées et critiquées en vue de présenter des propositions d’améliorations. Il en ressort que le niveau d’analyse de la vulnérabilité doit être affiné d’un point de vue départemental et communal. Il est essentiel de réaliser une distinction entre les ménages urbains et ruraux étant donné la diversité des stratégies opérées par ces ménages. L’évaluation de la vulnérabilité des ménages pastoraux et/ou transhumants devrait être repensée pour améliorer la prise en compte de ceux-ci. La recommandation principale de cette note est d’augmenter le nombre de ménages de l’échantillon d’analyse dans le but de mieux caractériser la vulnérabilité des ménages urbains, ruraux, pastoraux et de produire des indices de vulnérabilité par commune. [less ▲]

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See detailInventaire des archives de la Société anonyme d'Ougrée-Marihaye (1835-1955)
Delvaux, Anne-Catherine ULg

Book published by Archives générales du Royaume (2011)

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See detailIntroduction aux applications des ondelettes
Charles, Catherine ULg

Report (2011)

Cette note fait suite à une note antérieure. Son objectif est de faire prendre conscience au lecteur de la large étendue d'applications des ondelettes. Elle se découpe en deux parties. La première ... [more ▼]

Cette note fait suite à une note antérieure. Son objectif est de faire prendre conscience au lecteur de la large étendue d'applications des ondelettes. Elle se découpe en deux parties. La première illustre la théorie des ondelettes aux moyens d'applications tournées vers la statistique. La deuxième se tourne vers les applications en traitement du signal et de l'image. [less ▲]

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See detailElectrical and Magnetic Characterization of BSCCO and YBCO HTS Tapes for Fault Current Limiter Application
Lamas, Jerika S; Baldan, Carlos A; Shigue, Carlos Y et al

in IEEE Transactions on Applied Superconductivity (2011), 21(3), 3398-3402

Several high temperature superconductor (HTS) tapes have been developed since the late eighties. Due to the new techniques applied for their production, HTS tapes are becoming feasible and practical for ... [more ▼]

Several high temperature superconductor (HTS) tapes have been developed since the late eighties. Due to the new techniques applied for their production, HTS tapes are becoming feasible and practical for many applications. In this work, we present the test results of five commercial HTS tapes from the BSCCO and YBCO families (short samples of 200 mm). We have measured and analyzed their intrinsic and extrinsic properties and compared their behaviors for fault current limiter (FCL) applications. Electrical measurements were performed to determine the critical current and the n value through the V-I relationship under DC and AC magnetic fields. The resistance per unit length was determined as a function of temperature. The magnetic characteristics were analyzed through susceptibility curves as a function of temperature. As transport current generates a magnetic field surrounding the HTS material, the magnetic measurements indicate the magnetic field supported by the tapes under a peak current 1.5 times higher than the critical current, I(c). By pulsed current tests the recovery time and the energy/volume during a current fault were also analyzed. These results are in agreement with the data found in the literature giving the most appropriate performance conductor for a FCL device (I(peak) = 4 kA) to be used in a 220 V-60 Hz grid. [less ▲]

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See detailRupture of anterior communicating artery aneurysms during computed tomography angiography: description of the pathway for intraseptal and intraventricular hemorrhage.
SCHOLTES, Félix ULg; Signorelli, Francesco; Bojanowski, Michel W.

in Journal of neurosurgery (2011), 115(3), 617-20

Intraventricular hemorrhage is common after the rupture of anterior communicating artery (ACoA) aneurysms, although the anatomical pathway has not been described. Knowledge of the mechanism of hemorrhage ... [more ▼]

Intraventricular hemorrhage is common after the rupture of anterior communicating artery (ACoA) aneurysms, although the anatomical pathway has not been described. Knowledge of the mechanism of hemorrhage may enhance understanding of its prognosis. Using CT angiography, the authors analyzed this pathway in 2 cases of ACoA aneurysm rupture associated with intraventricular hemorrhage. The initial hemorrhages created a hyperdense ventriculographic image on which the subsequent contrast medium ejection could be followed. The contrast medium entered the subarachnoid space of the anterior interhemispheric fissure and broke through the lamina rostralis into the septum pellucidum and into the frontal horns of the lateral ventricles. Thus, the authors provide an explanation for bleeding from ACoA aneurysms into the ventricular system in the presence of an intact lamina terminalis. The septum pellucidum may act as a buffer before extension of the bleeding into the ventricular system. [less ▲]

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See detailA non-invasive approach to study lifetime exposure and bioaccumulation of PCBs in protected marine mammals: PBPK modeling in harbor porpoises
Weijs, Liesbeth; Covaci, Adrian; Yang, Raymond S. H. et al

in Toxicology and Applied Pharmacology (2011), In Press, Corrected Proof

In the last decade, physiologically based pharmacokinetic (PBPK) models have increasingly been developed to explain the kinetics of environmental pollutants in wildlife. For marine mammals specifically ... [more ▼]

In the last decade, physiologically based pharmacokinetic (PBPK) models have increasingly been developed to explain the kinetics of environmental pollutants in wildlife. For marine mammals specifically, these models provide a new, non-destructive tool that enables the integration of biomonitoring activities and in vitro studies. The goals of the present study were firstly to develop PBPK models for several environmental relevant PCB congeners in harbor porpoises (Phocoena phocoena), a species that is sensitive to pollution because of its limited metabolic capacity for pollutant transformation. These models were tested using tissue data of porpoises from the Black Sea. Secondly, the predictive power of the models was investigated for time trends in the PCB concentrations in North Sea harbor porpoises between 1990 and 2008. Thirdly, attempts were made to assess metabolic capacities of harbor porpoises for the investigated PCBs. In general, results show that parameter values from other species (rodents, humans) are not always suitable in marine mammal models, most probably due to differences in physiology and exposure. The PCB 149 levels decrease the fastest in male harbor porpoises from the North Sea in a time period of 18†years, whereas the PCB 101 levels decrease the slowest. According to the models, metabolic breakdown of PCB 118 is probably of lesser importance compared to other elimination pathways. For PCB 101 and 149 however, the presence of their metabolites can be attributed to bioaccumulation of metabolites from the prey and to metabolic breakdown of the parent compounds in the harbor porpoises. [less ▲]

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See detailPour le discours incitatif. Qu'apprendre aux maitres à dire à leurs élèves pour inciter ces derniers à lire les oeuvres littéraires en leur prêtant la qualité d'attention requise par l'intention artistique ?
Van Beveren, Julien ULg; Dumortier, Jean-Louis ULg; Dispy, Micheline ULg

in Repères : Recherches en Didactique du Français Langue Maternelle (2011), 43

L’apprentissage de l’expression d’un « jugement de gout motivé » et celui de l’expression d’un « jugement de valeur argumenté » sont, pour nous, à compter au nombre des activités de classe et de formation ... [more ▼]

L’apprentissage de l’expression d’un « jugement de gout motivé » et celui de l’expression d’un « jugement de valeur argumenté » sont, pour nous, à compter au nombre des activités de classe et de formation des maitres relatives à la lecture littéraire. L’énoncé de ces jugements peut se couler dans le moule du discours incitatif, engageant un public déterminé à lire ou à ne pas lire une œuvre littéraire donnée, voire un fragment de l’œuvre en question. Après avoir dit pourquoi il nous parait souhaitable d’aguerrir les futurs maitres à cette activité, nous faisons état d’une investigation portant sur des discours incitatifs produits par des enseignants, par de futurs formateurs d’enseignants et par de futurs enseignants, ces trois catégories œuvrant ou étant sur le point d’œuvrer à des niveaux d’études couvrant l’ensemble de la scolarité obligatoire. [less ▲]

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See detailRate of Malignancies and Infections in a Large Single Center Cohort of IBD Patients Treated With Thiopurines and Anti-TNF-Antibodies.
Ochsenkühn, T; Steinborn, A; Beigel, F et al

in Journal of Crohn’s and Colitis (2011)

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See detailInventaire des archives de la Compagnie générale des Conduites d'Eau (1865-1965)
Delvaux, Anne-Catherine ULg

Book published by Archives générales du Royaume (2011)

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See detailModeling post-combustion CO2 capture with amine solvents
Léonard, Grégoire ULg; Heyen, Georges ULg

in Computer Aided Chemical Engineering (2011), 29

Carbon capture and storage is a technology that can contribute to face the challenge of rising energy demand combined with a growing environmental awareness. In the present work, the CO2 capture process ... [more ▼]

Carbon capture and storage is a technology that can contribute to face the challenge of rising energy demand combined with a growing environmental awareness. In the present work, the CO2 capture process with monoethanolamine (MEA) is modeled using the simulation tool Aspen Plus. Two different modeling approaches are studied and compared: the equilibrium and the rate-based approaches. An optimization of key process parameters is performed and process modifications are studied with the objective of improving the global process energy efficiency. [less ▲]

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See detailPredictive modelling of the combined effect of temperature and water activity (aw) on the in vitro growth of Erwinia spp infecting potato tubers in Belgium
Moh, Augustin; Massart, Sébastien ULg; Lahlali, Rachid et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(3), 378-386

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See detailEffective Production of the Biodiesel Additive STBE by a Continuous Flow Process
Monbaliu, Jean-Christophe ULg; Winter, Marc; Chevalier, Bérengère et al

in Bioresource Technology (2011), 102

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See detailMorphological, chromosomal, and genic differences between sympatric Rattus rattus and Rattus satarae in South India
Pagès, Marie ULg; Corbet, Gordon; Orth, Annie et al

in Journal of Mammalogy (2011), 92(3), 659670

Two morphological forms of black rats (Rattus cf. rattus) were found living in sympatry in high-altitude dense forests of the Nilgiri Mountains, South India. The 1st one, often brown- or gray-bellied ... [more ▼]

Two morphological forms of black rats (Rattus cf. rattus) were found living in sympatry in high-altitude dense forests of the Nilgiri Mountains, South India. The 1st one, often brown- or gray-bellied, also is found commensal in lowland settlements and represents Rattus rattus cf. rufescens (Gray 1837), with a diploid number (2N) of 38 chromosomes. The 2nd form, which has most often a pure white belly, has 2N 5 42 chromosomes and is referable to Rattus r. satarae Hinton, 1918, based on morphological comparison with the holotype. A multidisciplinary study indicates that these 2 forms are characterized by clear-cut differences in biochemistry (electrophoresis of homologous isozymes), molecular sequences (mitochondrial and nuclear DNA), and chromosomes (detailed banding analysis). All these data, coupled to diagnostic morphological characteristics, support the hypothesis that Rattus satarae and Rattus rattus are separate, sympatric species, with no gene flow between them. Their similar external morphology is interpreted as the result of convergence through occupying the same ecological niche. [less ▲]

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See detailInfluence of carbon xerogel textural properties on the dynamic adsorption of methyl iodide
Almazán-Almazán, M. C.; López-Domingo, F. J.; Domingo-García, M. et al

in Chemical Engineering Journal (2011), 173(1), 19-28

X-ray microtomography coupled to image analysis has been used to study the influence of the adsorbent pore texture and the experimental conditions on the dynamic adsorption of methyl iodide in packed ... [more ▼]

X-ray microtomography coupled to image analysis has been used to study the influence of the adsorbent pore texture and the experimental conditions on the dynamic adsorption of methyl iodide in packed filters. By applying this imaging technique the internal axial adsorption profiles for increasing exposure times to the gas stream are analysed. This experimental technique establishes a new technology to study in situ the dynamic adsorption of volatile compounds. Resorcinol-formaldehyde based carbon xerogels have been used as adsorbents, as their pore texture can be tuned by changing the synthesis conditions. The textural characteristics of the adsorbents (surface areas and pore volumes) have been assessed by using nitrogen and carbon dioxide adsorption as well as mercury porosimetry. The methyl iodide dynamic adsorption results show that, for the same gas flow rate and CH3I inlet concentration, the adsorbed amount is highly dependent on large pore volumes. Thus, samples with almost the same micropore volumes (adsorption volumes) have different methyl iodide adsorption capacities, which are related to, the above mentioned, large pores. The influence of both the gas carrier flow rate and the methyl iodide inlet concentration on the adsorption can be explained using the so-called linear driving force model. This approach takes into account the fact that internal transport limitations are directly related to the pore texture. Moreover, the simulation of the dynamic adsorption process has allowed relating the simulated axial concentration profiles to the experimental X-ray microtomography data. [less ▲]

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See detailA new benzotriazole-mediated stereoflexible gateway to hetero-2,5-diketopiperazines
Monbaliu, Jean-Christophe ULg; Hansen, Finn; Beagle, Lucas et al

in Chemistry : A European Journal (2011), 18

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See detailA coupled two-scale computational scheme for the failure of periodic quasi-brittle thin planar shells and its application to masonry
Mercatoris, Benoît ULg; Massart, T. J.

in International Journal for Numerical Methods in Engineering (2011), 85(9), 1177-1206

This paper presents a multi-scale framework for the failure of periodic quasi-brittle thin planar shells. The failure behavior of textured or periodic heterogeneous materials is strongly influenced by ... [more ▼]

This paper presents a multi-scale framework for the failure of periodic quasi-brittle thin planar shells. The failure behavior of textured or periodic heterogeneous materials is strongly influenced by their mesostructure. Their periodicity and the quasi-brittle nature of their constituents result in complex behaviors such as damage-induced anisotropy properties with localization of damage, which are difficult to model by means of macroscopic closed-form constitutive laws. A computational homogenization procedure is used for the in-plane and out-of-plane behavior of such planar shells, and is combined with an acoustic tensor-based failure detection adapted to shell kinematics to detect the structural-scale failure. Based on an assumption of single period failure, the localization of damage at the structural scale is represented by means of mesostructurally informed embedded strong discontinuities incorporated in the macroscopic shell description. A new enhanced scale transition is outlined for shell failure, based on an approximate energy consistency argument to objectively upscale the energy dissipation. The corresponding multi-scale framework results are compared with direct fine-scale modeling results used as a reference for the case of masonry, showing good agreement in terms of the load-bearing capacity, of failure mechanisms and of associated energy dissipation. © 2010 John Wiley & Sons, Ltd. [less ▲]

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See detailInventaire des archives de la Société anonyme métallurgique d'Espérance-Longdoz (1806-1971)
Delvaux, Anne-Catherine ULg

Book published by Archives générales du Royaume (2011)

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