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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 detailVoice related complaints in the pediatric population
Verduyckt, Ingrid; Remacle, Marc; Jamart, Jacques et al

in Journal of Voice (2011), 25(3), 373-380

Subjective evaluation of the voice by the patient is routinely assessed in the adult dysphonic population; this Q6 is, however, not the case in the pediatric population. There were three objectives of ... [more ▼]

Subjective evaluation of the voice by the patient is routinely assessed in the adult dysphonic population; this Q6 is, however, not the case in the pediatric population. There were three objectives of this study: the first goal was to study the ability of children aged 5–13 years to express themselves about physical, emotional, and sociofunctional aspects of their voice. The second goal was to explore if specific voice-related complaints were expressed by dysphonic children as compared with normophonic children. The third goal was to compare the dysphonic children’s voice-related complaints with those of their mothers. The overall objective was to set the grounds for the elaboration of a standardized questionnaire in French concerning subjective evaluation of voice in children. Twenty-five dysphonic children with vocal complaint (15 nodules, one polyp, one microweb, eight unspecified) and 55 normophonic children aged 5–13 years were interviewed. The interviews were semistructured based on a canvas of voice-related questions. The dysphonic children’s mothers were interviewed with the mean of a written questionnaire and were invited to discuss their answers orally with the examiner. The results were analyzed ualitatively and statistically.AChi-square test and the Fisher’s test were used to analyze the differences between the complaints expressed by the dysphonic and the normophonic children, and a binomial test was used to compare the children’s answers with their mothers’ answers. The qualitative analysis of the interviews suggests that children are capable of reflecting over their ownvoice and of giving autonomous information about different aspects of their voice. It also appeared that voice is a complex phenomenon and that it needs to be clearly and cautiously defined to the children.We identified 27 different complaints related to the voice, out of which 17 were significantly more expressed by dysphonic than by normophonic children (P < 0.05). Three of the 27 identified complaints show significant discordances between the mothers and the dysphonic children. The results suggest that children are capable of making a subjective and autonomous evaluation of their voice and that dysphonic children experience significantly more voicerelated discomfort than nondysphonic children. The complaints expressed by the dysphonic children and their mothers are not all in concordance. The main conclusion is that a standardized subjective evaluation of the voice, not only by the parents but also by the child itself, would be relevant in the assessment of pediatric dysphonia. [less ▲]

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See detailDes rats sur les murs
Saint-Amand, Denis ULg

Article for general public (2011)

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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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See detailFormer des établissements de la petite enfance à l'approche interactive
Stambak, Mira; Pirard, Florence ULg; Amilhaud, Geneviève et al

in Hardy, Marianne; Belmont, Brigitte; Noël-Hureau, Elisabeth (Eds.) Des recherches-actions pour changer l'école. (2011)

The interactive pedagogy elaborated by the Cresas (in Paris) has influenced the educational practice and the professional accompaniment in the early childhood sector. It can be interpreted as a ... [more ▼]

The interactive pedagogy elaborated by the Cresas (in Paris) has influenced the educational practice and the professional accompaniment in the early childhood sector. It can be interpreted as a professionalization process where actions, actors, and environment undergo change simultaneously. [less ▲]

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See detailTelomere deregulations possess cytogenetic, phenotype, and prognostic specificities in acute leukemias.
CAPRARO, Valérie ULg; Zane, Linda; Poncet, Delphine et al

in Experimental Hematology (2011), 39(2), 195-2022

OBJECTIVE: Telomeres are protected by tightly regulated factors and elongated by telomerase. Short and/or deprotected chromosomes are recombinogenic and thereby cancer prone. MATERIALS AND METHODS ... [more ▼]

OBJECTIVE: Telomeres are protected by tightly regulated factors and elongated by telomerase. Short and/or deprotected chromosomes are recombinogenic and thereby cancer prone. MATERIALS AND METHODS: Together with the quantification of telomerase activity (TA), measuring telomere length (TL) and expression of the genes that govern telomere protection and elongation are useful for assessing telomere homeostasis. RESULTS: By these means we demonstrate that TL, hTERT, and TA are in the order acute myelogenous leukemia (AML) > T-cell acute lymphoblastic leukemia (T-ALL) > B-cell acute lymphoblastic leukemia (B-ALL) > T-ALL > AML, and B-ALL > AML > T-ALL. AML0 and AML3 display the lowest amounts of hTERT transcripts, and ALL and AML cells with cytogenetic abnormalities possess the shortest telomeres. hTERT expression includes phenotype-specific RNA maturation and correlates with TA but not with TL. A wide ratio of TA to hTERT expression between leukemia subtypes suggests phenotype-specific hTERT post-transcriptional deregulations. B- and T-ALL overexpress Ku70 and Pinx1, T-ALL PTOP and RAP1, and B-ALL TRF2, the expression of which is significantly higher in cases with abnormal karyotype. hTERT transcription and TL correlate with response to intensive chemotherapy, and hTERT and RAD50 are independent prognostic factors for survival. CONCLUSIONS: Each leukemia subtype possesses specific telomere dysregulations that rely on phenotype, karyotype, response to treatment, and survival. [less ▲]

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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 detailA multicentric evaluation of IDMS-traceable creatinine enzymatic assays
Pieroni, Laurence; DELANAYE, Pierre ULg; Boutten, Anne et al

in Clinica Chimica Acta (2011), 412

Chronic kidney disease definition is based on glomerular filtration rate (GFR) estimations which are derived from creatinine-based equations. The accuracy of GFR estimation is thus largely dependent of ... [more ▼]

Chronic kidney disease definition is based on glomerular filtration rate (GFR) estimations which are derived from creatinine-based equations. The accuracy of GFR estimation is thus largely dependent of those of serum creatinine assays. International recommendations highlight the need for traceable creatinine assays. The French Society of Clinical Biochemistry conducted a study for measuring accuracy of creatinine enzymatic methods. This evaluation involved 25 clinical laboratories. Creatinine was measured in serum pools ranging from 35.9±0.9 μmol/L to 174.5±3.1 μmol/L (IDMS determination) using 12 creatinine enzymatic methods. For all creatinine values greater than 74.4±1.4 μmol/L, the bias and imprecision did not exceed 5% and 5.9%, respectively. For the lowest value (35.9±0.9 μmol/L), the bias ranged from −1.8 to 9.9% (with one exception). At this level, the imprecision ranged from 1.9 to 7.8%. The true performances of the assays (couples of bias and relative standard deviation), were evaluated using Monte-Carlo simulations. Most of the assays fall within the maximum Total Error of 12% at all concentrations. This study demonstrates substantial improvements in the calibration, traceability and precision of the enzymatic methods, reaching the NKDEP recommendations. Moreover, most of these assays allowed accurate creatinine measurements for creatinine levels lower than 40 μmol/L. [less ▲]

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See detailTransient yielding during compression tests on ECAP’ed AA1050 Aluminium
Verlinden, Bert; Chen, Enze; Duchene, Laurent ULg et al

in Materials Science Forum (2011), 667-669

In most papers dealing with tension and/or compression tests, the conventional yield stress is determined either by an offset method (usually 0.2% strain) or by back extrapolation from the stress-strain ... [more ▼]

In most papers dealing with tension and/or compression tests, the conventional yield stress is determined either by an offset method (usually 0.2% strain) or by back extrapolation from the stress-strain curve. In our experiments on ECAP‟ed Aluminium a transient hardening saturation (THS) is always observed during the compression tests, but not during the tensile tests. This THS occurs at a significantly lower stress than the conventional yield stress. The aim of the present paper is to determine which the “real” start of yielding is. Two different experimental approaches have been adopted, confirming that the THS stage is exactly the yielding stage. This is not unimportant because it increases the tension-compression asymmetry and hence the back-stress and kinematic hardening. The reason for this different behaviour between tension and compression can be ascribed to a different change in strain path with respect to the ECAP deformation. [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 detailAssessment of Crohn’s disease activity by FDG-PET/CT through a novel quantitative approach.
SABOURY, B.; HUSTINX, Roland ULg; BROTHERS, B. et al

in Journal of Nuclear Medicine (The) (2011), 52(SUPPL), 284

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See detailDensity of states of chaotic Andreev billiards
Kuipers, Jack; Engl, Thomas; Berkolaiko, Gregory et al

in PHYSICAL REVIEW B (2011), 83(19), 195316-21

Quantum cavities or dots have markedly different properties depending on whether their classical counterparts are chaotic or not. Connecting a superconductor to such a cavity leads to notable proximity ... [more ▼]

Quantum cavities or dots have markedly different properties depending on whether their classical counterparts are chaotic or not. Connecting a superconductor to such a cavity leads to notable proximity effects, particularly the appearance, predicted by random matrix theory, of a hard gap in the excitation spectrum of quantum chaotic systems. Andreev billiards are interesting examples of such structures built with superconductors connected to a ballistic normal metal billiard since each time an electron hits the superconducting part it is retroreflected as a hole (and vice versa). Using a semiclassical framework for systems with chaotic dynamics, we show how this reflection, along with the interference due to subtle correlations between the classical paths of electrons and holes inside the system, is ultimately responsible for the gap formation. The treatment can be extended to include the effects of a symmetry-breaking magnetic field in the normal part of the billiard or an Andreev billiard connected to two phase-shifted superconductors. Therefore, we are able to see how these effects can remold and eventually suppress the gap. Furthermore, the semiclassical framework is able to cover the effect of a finite Ehrenfest time, which also causes the gap to shrink. However, for intermediate values this leads to the appearance of a second hard gap-a clear signature of the Ehrenfest time. [less ▲]

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See detailLe personnage au carrefour du médiatique et du social: Une analyse des débuts de « l’affaire Calice » à la RTBF
Devresse, Jenifer ULg

in Quaderni : la Revue de la Communication (2011), 74

Que font les médias au social ? Comment le récit de l’information peut-il faire sens ? Comment l’information télévisuelle dispose-t-elle de son public ? Autant de questions qui interrogent les mécanismes ... [more ▼]

Que font les médias au social ? Comment le récit de l’information peut-il faire sens ? Comment l’information télévisuelle dispose-t-elle de son public ? Autant de questions qui interrogent les mécanismes de construction sociale du sens, au carrefour du récit médiatique et de sa "réception". Espérant contribuer de la sorte à l’appréhension de ces mécanismes, cet article souligne, à travers une étude de cas, l’intérêt pour l’analyse des médias de la notion de personnage narratif. Il invite à voir dans ce personnage média-informé l’une des clés fondamentales qui préside à la détermination des possibles de la réception télévisuelle – et a fortiori de l’engagement. Analysant le système des personnages de « l’affaire Calice » tels que mis en scène dans les JT de la RTBF, l’étude examine ainsi la manière dont les positions spectatorielles induites par le récit des débuts de l’affaire tendent à déterminer certaines dispositions du public-acteur social. [less ▲]

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