References of "2011"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailSensitivity of Structural Response to Wind Turbulence Characteristics
Denoël, Vincent ULg

in Marcuso, Russell J. (Ed.) Turbulence: Theory, Types and Simulation - Series: Physics Research and Technology (2011)

Civil engineering structures that are built in the atmospheric boundary layer have to be designed according to the gusty winds they are likely to withstand during their lifetime. Traditionally statistical ... [more ▼]

Civil engineering structures that are built in the atmospheric boundary layer have to be designed according to the gusty winds they are likely to withstand during their lifetime. Traditionally statistical characteristics of the wind turbulence -as standard deviation of and correlation between turbulence components, frequency content, etc. - are provided to structural engineers by meteorologists. The first dialogue between these two communities dates back to 1960's when they agreed on a list of necessary statistical characteristics of turbulence that need to be observed and measured to feed the structural models available at that time. In the framework of advanced wind loading models developed recently, it turns out that this basic list of statistical characteristics of turbulence is no longer sufficient. In this chapter, we point out some quantities that would need to be measured and others that are already measured but require a more precise estimation. This need is justified by analyzing the sensitivity, to these quantities, of the structural response to an advanced Wind loading model. After having introduced the need for advanced modeling of the wind loading, and eventually thus of the wind turbulence, a nonlinear non-Gaussian quasi-steady loading model is presented. Then the model is rigorously analyzed with cumbersome mathematics and statistics, with the permanent background aim at estimation of the influence of the turbulence properties. Final results are however presented in a concise way in order to pave the way for the future dialogue between engineers and meteorologists, and so build up the advanced design procedures that will presumably be used during the coming decades. [less ▲]

Detailed reference viewed: 15 (0 ULg)
Full Text
Peer Reviewed
See detailQuantification of Equid herpesvirus 5 DNA in clinical and necropsy specimens collected from a horse with equine multinodular pulmonary fibrosis
Marenzoni, M. L.; Passamonti, F.; Lepri, E. et al

in Journal of Veterinary Diagnostic Investigation (2011), 23

Detailed reference viewed: 9 (3 ULg)
Full Text
Peer Reviewed
See detailAtomic decay data for modeling the Al K-lines
Palmeri, P; Quinet, Pascal ULg; Mendoza, C et al

in Astronomy and Astrophysics (2011), 525

Detailed reference viewed: 2 (0 ULg)
See detailComparative magnetotail flapping: Overview of observations at Earth, Jupiter and Saturn
Volwerk, M.; Andre, N.; Arridge, C. et al

Conference (2011)

Detailed reference viewed: 6 (0 ULg)
Full Text
Peer Reviewed
See detailNovel HDAC/DNMT Twin Inhibitors Interfere with Angiogenesis
Shiva Shankar, Thammadihalli Veerasangaiah ULg; Sulka, Béatrice ULg; Blacher, Silvia ULg et al

Poster (2011)

DNA methylation and histone deacetylation are two key epigenetic modifications that play central role in regulation of gene expression. Several studies have shown that histone deacetylases (HDAC) and DNA ... [more ▼]

DNA methylation and histone deacetylation are two key epigenetic modifications that play central role in regulation of gene expression. Several studies have shown that histone deacetylases (HDAC) and DNA methyltransferases (DNMT) inhibitors are potent anti-angiogenic compounds. Though combination of HDAC and DNMT inhibitors are now being examined in clinical trials of hematological malignancies, little work has been done to understand the effect of this combination on physiological and tumoral angiogenesis. We have designed and tested a family of twin drugs with intrinsic HDAC and DNMT inhibitory activities in relevant models of angiogenesis in vitro (Human Umbilical Vein Endothelial Cells – HUVEC and aortic ring) and in vivo (chick chorioallantoic membrane and Zebrafish). We have identified a lead compound having quantifiable anti-angiogenic effect without cytotoxicity affecting global histone acetylation and DNA methylation levels. In order to elucidate its anti-angiogenic mechanism, we characterized gene expression pattern simultaneously with the methylation profile of HUVEC cells treated with the lead compound and reference epigenetic modulators. This approach based on parallel microarray analyses permitted us to underscore a list of genes exclusively affected by the lead compound but not by other HDAC or DNMT inhibitors. These genes were then analyzed using the Ingenuity Pathway software revealing potential involvement of a subset of genes in angiogenesis. Our present aim is to validate the expression levels of a series of genes with respect to epigenetic mechanisms (histone modifications and DNA methylation). Finally, the biological relevance of the target genes will be explored by RNA silencing. Hence, we are using these novel epigenetic modulators as a tool to understand the regulatory mechanism of angiogenesis and to develop effective approaches to treat cancer. [less ▲]

Detailed reference viewed: 189 (54 ULg)
Full Text
Peer Reviewed
See detailQ fever IN JApaN: an update REVIEW
Porter, Sarah ULg; Czaplicki, G.; Mainil, Jacques ULg et al

in Veterinary Microbiology (2011), 149

Detailed reference viewed: 20 (4 ULg)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 27 (0 ULg)
Full Text
Peer Reviewed
See detailLes enjeux de la sécurité alimentaire en RD Congo : approche par l'analyse de la consommation alimentaire des ménages kinois
Muteba Kalala, Damien ULg; Duquesne, Brigitte; Lebailly, Philippe ULg

in Brot, Jean (Ed.) XXVIèmes Journées scientifiques ATM "Crises et soutenabilité du développement" : 2-3-4 juin, BETA CNRS Université du Strasbourg (2011)

Afin d'appréhender la problématique de la sécurité alimentaire en République Démocratique du Congo, différents dispositifs de recherche ont été mis en place au départ d'un groupe de recherche ... [more ▼]

Afin d'appréhender la problématique de la sécurité alimentaire en République Démocratique du Congo, différents dispositifs de recherche ont été mis en place au départ d'un groupe de recherche interdisciplinaire en appui à la politique, financé par la coopération belge (DGCD/CUD) : Groupe de Recherche en Appui à la Politique pour l'Agriculture et l'Alimentation en Afrique (GRAP 3 A). Cet article présente l'un des axes de ce programme de recherche interuniversitaire mené conjointement avec des chercheurs de l'Université de Kinshasa : une approche de l'insécurité alimentaire et de stratégies d'une politique alimentaire durable à partir de l'étude de la consommation alimentaire des ménages de Kinshasa par différentes enquêtes qui se poursuivront au cours des quatre prochaines années. [less ▲]

Detailed reference viewed: 16 (3 ULg)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 33 (6 ULg)
Full Text
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 ▲]

Detailed reference viewed: 25 (1 ULg)
See detailL'islamophobie sur Internet
Jamin, Jérôme ULg

Article for general public (2011)

Detailed reference viewed: 14 (5 ULg)
Full Text
Peer Reviewed
See detailMultimodal neuroimaging in patients with disorders of consciousness showing "functional hemispherectomy".
Bruno, Marie-Aurélie ULg; Fernandez-Espejo, D.; Lehembre, Remy ULg et al

in Progress in Brain Research (2011), 193

Beside behavioral assessment of patients with disorders of consciousness, neuroimaging modalities may offer objective paraclinical markers important for diagnosis and prognosis. They provide information ... [more ▼]

Beside behavioral assessment of patients with disorders of consciousness, neuroimaging modalities may offer objective paraclinical markers important for diagnosis and prognosis. They provide information on the structural location and extent of brain lesions (e.g., morphometric MRI and diffusion tensor imaging (DTI-MRI) assessing structural connectivity) but also their functional impact (e.g., metabolic FDG-PET, hemodynamic fMRI, and EEG measurements obtained in "resting state" conditions). We here illustrate the role of multimodal imaging in severe brain injury, presenting a patient in unresponsive wakefulness syndrome (UWS; i.e., vegetative state, VS) and in a "fluctuating" minimally conscious state (MCS). In both cases, resting state FDG-PET, fMRI, and EEG showed a functionally preserved right hemisphere, while DTI showed underlying differences in structural connectivity highlighting the complementarities of these neuroimaging methods in the study of disorders of consciousness. [less ▲]

Detailed reference viewed: 36 (4 ULg)
Full Text
Peer Reviewed
See detailIsolation of five new monosomic alien addition lines of Gossypium australe F. Muell in G. hirsutum L. by SSR and GISH analyses
Sarr, D.; Lacape, J.-M.; Rodier-Goud, M. et al

in Plant Breeding (2011), 130

Gossypium australe F. Muell (2n + 2x = 26) is a wild perennial species possessing agronomic useful traits that would be interesting to introgress into G. hirsutum L. (2n = 4x = 52), the main cultivated ... [more ▼]

Gossypium australe F. Muell (2n + 2x = 26) is a wild perennial species possessing agronomic useful traits that would be interesting to introgress into G. hirsutum L. (2n = 4x = 52), the main cultivated cotton species. To isolate monosomic alien addition lines (MAALs) of G. australe in G. hirsutum, the [2(G. hirsutum X G. australe) X G. hirsutum] pentaploid (2n = 5x = 65) was backcrossed as male parent to G. hirsutum. Analysis of 42 BC1 plants and seven alien addition lines, already available, with 150 SSR markers developed from G. hirsutum revealed a cross-species amplification rate of 100% and a polymorphism rate of 56%. Eighty polymorphic SSR markers generated 87 G. australe-specific loci that have been assigned by a hierarchical cluster analysis to 13 linkage groups corresponding to the 13 chromosomes of G. australe. Analysis by SSR markers and genomic in situ hybridization of the self-progeny of disomic alien addition lines, backcross progeny of the pentaploid, allowed the isolation of five new MAALs. [less ▲]

Detailed reference viewed: 54 (18 ULg)
See detailEléments de droit de la responsabilité extracontractuelle
Kohl, Benoît ULg

Learning material (2011)

Detailed reference viewed: 12 (2 ULg)
Full Text
See detailAtouts, faiblesses et défis futurs de la filière lait et produits laitiers en Belgique
Burny, Philippe ULg

in Centre wallon de Recherches agronomiques (Ed.) Seizième Carrefour des Productions Animales "La Filière laitière bovine européenne est-elle durable ?" (2011)

Detailed reference viewed: 28 (5 ULg)
See detailLiving with Locked-in syndrome.
Guldenmund, Justus Pieter ULg

Speech (2011)

Detailed reference viewed: 7 (1 ULg)
See detailThe prosody of non-native speech
Rasier, Laurent ULg

Scientific conference (2011)

Detailed reference viewed: 19 (0 ULg)
Full Text
Peer Reviewed
See detailImpact of formic/acetic acid and ammonia pre-treatments on chemical structure and physico-chemical properties of Miscanthus x giganteus lignins
Vanderghem, Caroline ULg; Richel, Aurore ULg; Jacquet, Nicolas ULg et al

in Polymer Degradation & Stability (2011), 96(10), 1761-1770

Miscanthus x giganteus was treated with formic acid/acetic acid/water (30/50/20 v/v) for 3 h at 107 C and 80° C, and soaking in aqueous ammonia (25% w/w) for 6 h at 60 C. The effects of these ... [more ▼]

Miscanthus x giganteus was treated with formic acid/acetic acid/water (30/50/20 v/v) for 3 h at 107 C and 80° C, and soaking in aqueous ammonia (25% w/w) for 6 h at 60 C. The effects of these fractionation processes on chemical structure, physico-chemical properties and antioxidant activity of extracted lignins were investigated. Lignins were characterized by their purity, carbohydrate composition, thermal stability, molecular weight and by Fourier transform infrared (FTIR), 1H and quantitative 13C nuclear magnetic resonance (NMR), adiabatic broadband {13C-1H} 2D heteronuclear (multiplicity edited) single quantum coherence (g-HSQCAD). The radical scavenging activity towards 2,2-diphenyl-1-picrylhydrazyl (DPPH) was also investigated. Formic/acetic acid pretreatment performed in milder conditions (80° C for 3 h) gave a delignification percentage of 44.7% and soaking in aqueous ammonia 36.3%. Formic/acetic acid pretreatment performed in harsh conditions (107°C for 3 h) was more effective for extensive delignification (86.5%) and delivered the most pure lignin (80%). The three lignin fractions contained carbohydrate in different extent: 3% for the lignin obtained after the formic/acetic acid pretreatment performed at 107 C (FAL-107), 5.8% for the formic/acetic acid performed at 80°C (FAL-80) and 13.7% for the ammonia lignin (AL). The acid pretreatment in harsh conditions (FAL-107) resulted in cleavage of b-O-4' bonds and aromatic C-C. Repolymerisation was thought to originate from formation of new aromatic C-O linkages. Under milder conditions (FAL-80) less b-O-4' linkages were broken and repolymerisation took place to a lesser extent. Ammonia lignin was not degraded to a significant extent and resulted in the highest weight average 3140 g mol -1. Despite the fact of FAL-107 repolymerisation, significant phenolic hydroxyls remained free, explaining the greater antioxidant activity. [less ▲]

Detailed reference viewed: 97 (65 ULg)
Full Text
Peer Reviewed
See detailFlutter and stall flutter of a rectangular wing in a wind tunnel
Norizham, Abdul Razak ULg; Andrianne, Thomas ULg; Dimitriadis, Grigorios ULg

in AIAA Journal (2011), 49(10), 2258-2271

The aeroelastic behavior of a rectangular wing with pitch and plunge degrees of freedom was observed experimentally using pressure, acceleration and PIV measurements. The wing was set at different static ... [more ▼]

The aeroelastic behavior of a rectangular wing with pitch and plunge degrees of freedom was observed experimentally using pressure, acceleration and PIV measurements. The wing was set at different static angles of attack and wind tunnel airspeeds. The wing's dynamic behavior was governed by a two-parameter bifurcation from steady to Limit Cycle Oscillations (LCO), the two parameters being the airspeed and the static angle of attack. At the lowest static angle, the wing underwent a classical flutter phenomenon that was transformed into a supercritical Hopf bifurcation at higher angles. The latter was combined with a fold bifurcation at intermediate angles of attack. All LCOs observed were either low amplitude oscillations with time-varying amplitude or high amplitude oscillations with nearly steady amplitude. They were caused by two different types of dynamic stall phenomena. During low amplitude LCOs the periodically stalled flow covered only the rear part of the wing. During high amplitude LCOs, trailing edge and leading edge separation occured. Trailing edge separation was characterized by a significant amount of unsteadiness, varying visibly from cycle to cycle. The occurrence of leading edge separation was much more regular and had the tendency to stabilize the amplitude of the LCO motion. [less ▲]

Detailed reference viewed: 180 (37 ULg)