References of "2012"
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See detailL’innovation managériale par et pour l’organisation ?
Pichault, François ULg

Conference (2012, January 19)

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See detailLes rôles des entrprises sociales dans une perspective dynamique
Mertens de Wilmars, Sybille ULg

Scientific conference (2012, January 19)

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See detailComplex genetic structures between nascent species in Southeast Asian Black rats (Rattus rattus complex)
Pagès, Marie ULg; Bazin, Eric; Galan, Maxime et al

Scientific conference (2012, January 19)

Black rats are among the major invasive vertebrates with severe ecological, economic and health impacts. Remarkably, their evolutionary history has received little attention and there is no firm agreement ... [more ▼]

Black rats are among the major invasive vertebrates with severe ecological, economic and health impacts. Remarkably, their evolutionary history has received little attention and there is no firm agreement on how many species should be recognized within the Black rat complex. Members of the species complex are native from India and Southeast Asia. Current taxonomy suggests that three taxa live in sympatry in several places of Thailand, Cambodia and Lao People's Democratic Republic where the present study was conducted: two accepted species (Rattus tanezumi, Rattus sakeratensis) and an additional mitochondrial lineage of unclear taxonomic status here referred as ‘Rattus R3’. We used an extensive sampling, morphological data and diverse genetic markers of different evolutionary rates and parental inheritance (two mitochondrial DNA genes, one nuclear gene and eight microsatellite loci) to assess the reproductive isolation between these three taxa. Two close Asian relatives, Rattus argentiventer and Rattus exulans, were included in the genetic analyses for comparison. Genetic analyses revealed discordant patterns between the mitochondrial and the nuclear data. The mitochondrial phylogeny identified three reciprocally monophyletic clades in the Black rat complex. Yet, the phylogeny of the nuclear exon IRBP and the clustering and assignation analyses using the eight microsatellites failed to separate tanezumi and R3. Morphometric analyses reinforced the nuclear data. The incongruence between mitochondrial data and nuclear (and morphological) data, render tanezumi/R3 paraphyletic for mitochondrial lineages with respect to sakeratensis. Different evolutionary processes such as shared ancestral polymorphism and incomplete lineage sorting or hybridization with massive mitochondrial introgression between incipient species may be invoked to account for this unusual genetic pattern in mammals. [less ▲]

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See detailNotion de base du développement durable
Habran, Maxime ULg

Conference given outside the academic context (2012)

Introduction à la notion de base du développement durable

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See detailPutting Prebiotics in their Place. On Europe's Intestinal Flora
Hendrickx, Kim ULg

Scientific conference (2012, January 18)

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See detailLa chimie des saccharides
Gillet, Sébastien ULg; Paquot, Michel ULg

Learning material (2012)

Synthèse de chimie des sucres

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See detailMeasurement and modeling of ablation of the bottom of supraglacial lakes in western Greenland
Tedesco, Marco; Luthje, M.; Steffen, K. et al

in Geophysical Research Letters (2012), 39(L02502), 5

We report measurements of ablation rates of the bottom of two supraglacial lakes and of temperatures at different depths collected during the summers of 2010 and 2011 in west Greenland. To our knowledge ... [more ▼]

We report measurements of ablation rates of the bottom of two supraglacial lakes and of temperatures at different depths collected during the summers of 2010 and 2011 in west Greenland. To our knowledge, this is the first time that such data sets are reported and discussed in the literature. The measured ablation rates at the bottom of the two lakes are of the order of ∼6 cm/day, versus a rate of ∼2.5–3 cm/day in the case of bare ice of surrounding areas. Though our measurements suggest the presence of a vertical temperature gradient, it is not possible to draw final conclusions as the measured gradient is smaller than the accuracy of our temperature sensors. In-situ measurements are compared with the results of a thermodynamic model forced with the outputs of a regional climate model. In general, the model is able to satisfactorily reproduce the measured quantities with RMSE of the order of 3–4 cm for the ablation and ∼1.5°C in the case of water temperature. Our results confirm that the ablation at the bottom of supraglacial lakes plays an important role on the overall lake volume with the ablation in the case of ice covered by a lake being 110–135% of that over bare ice at nearby locations. Beside ice sheet hydrological implications, melting at the bottom of a supraglacial lake might affect estimates of lake volume from spaceborne visible and near-infrared measurements. [less ▲]

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See detailCLIMAT: DES BOULEVERSEMENTS CONSTATES (2012)
Ozer, Pierre ULg

Scientific conference (2012, January 17)

17 janvier 2012 : Climat, des bouleversements constatés Docteur en géographie à l’Université de Liège, spécialisé sur les problèmes liés à la désertification, aux catastrophes naturelles et à leur gestion ... [more ▼]

17 janvier 2012 : Climat, des bouleversements constatés Docteur en géographie à l’Université de Liège, spécialisé sur les problèmes liés à la désertification, aux catastrophes naturelles et à leur gestion, et à de nombreux aléas climatiques, Pierre OZER exposera l’évolution du climat, en faisant le lien entre les travaux du GIEC (Groupe d’experts Intergouvernemental sur l’Evolution du Climat) et de l’UNFCCC (Convention Cadre des Nations Unies sur les Changements Climatiques). A travers cette démonstration il montrera le poids de ces travaux au cours des négociations internationales (passées, actuelles et à venir). [less ▲]

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See detailEffet de l'âge sur la cognition: réalité, exagération, ou fiction?
Adam, Stéphane ULg

Scientific conference (2012, January 17)

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See detailLa politique scientifique en Wallonie et en Fédération Wallonie-Bruxelles : quelle stratégie au-delà de 2015 ?
Fallon, Catherine ULg

Speech (2012)

What are the main trends affecting science policy in Wallonia. What are the choices to be decided before 2015 ?

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See detailCFD application : Green Building Design
Reiter, Sigrid ULg

Scientific conference (2012, January 17)

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See detailCour et discours. Parler sous haute surveillance dans la France du XVIIe siècle
Dumortier, Jean-Louis ULg

Conference given outside the academic context (2012)

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See detailIdentification of Pythium species inducing common bean (Phaseolus vulgaris L.) root rot symptoms and development of backcrosses to improve the level of varietal resistance to this disease
Nzungize Rusagara, John ULg

Doctoral thesis (2012)

The common bean (Phaseolus vulgaris L.) is the most important food legume grown worldwide. It is a prioritary crop in various countries of East Africa and is grown mainly by small farmers for home ... [more ▼]

The common bean (Phaseolus vulgaris L.) is the most important food legume grown worldwide. It is a prioritary crop in various countries of East Africa and is grown mainly by small farmers for home consumption, the excess being sold in markets. Important yield losses of common bean induced by root rot diseases have been identified in several countries in East Africa including Rwanda. This is partly explained by the intensification of the cultivation of beans, the absence of rotations, the practice of continuous cultivation of this legume, and decline in soil fertility. Although bean root rot symptoms are caused by a number of soil borne pathogens depending on environmental conditions, Pythium spp. are the fungal pathogens most frequently associated with severe epidemics in eastern Africa. Studies on root rot have indicated that continuous cropping of beans, a common practice in eastern Africa, exacerbates the problem. This work was undertaken to improve the varietal resistance of common bean to limit the damages caused by Pythium in Rwanda. An analysis of the diversity of Pythium species associated with root rot was conducted through collect of samples of common bean plants throughout the country and through the characterization of the Pythium species causing root rot. The collected samples were used to isolate 96 typical Pythium colonies which were classified into 16 Pythium species according to their respective molecular sequences of the ribosomal ITS fragments. Molecular characterization using the ITS-DNA sequences was also carried out on samples isolated on infected beans roots. The study of the distribution of each species identified within the samples analyzed, revealed that Pythium vexans is the most widespread taxon in the different common bean producing areas in Rwanda. Pathogenicity tests of the 16 identified Pythium species were performed on a set of 10 common bean varieties. The results showed that all identified Pythium species were pathogenic to common bean: they all induce symptoms of root rot under controlled conditions. However, the common bean varieties used in this investigation showed differences in their reaction to inoculation with the 16 Pythium species. At the end of this work of the characterization of Pythium species isolated in Rwanda, a scheme for improving varietal resistance has been implemented. It is based on a backcross protocol assisted by molecular marker (PYAA 19800). Recurrent parents are composed of three common bean varieties traditionally grown in Rwanda while the two donor parents are a resistant variety of the Mesoamerican gene pool and a resistant variety of Andean pool. The progeny obtained after the backcrossing program was subjected to the pathogenicity trials by inoculating with a strain of Pythium ultimum in controlled conditions in order to verify the effectiveness of this improvement protocol. These trials have shown that in the offspring all the individuals showing the presence of the marker gene were also resistant to Pythium with very low levels of severity at the end of inoculation tests. [less ▲]

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See detailEntrepreneuriat social : enjeux pour la recherche et l'enseignement
Mertens de Wilmars, Sybille ULg

Scientific conference (2012, January 16)

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See detailSynthesis of thermo-responsive poly(N-vinylcaprolactam)-containing block copolymers by cobalt-mediated radical polymerization
Hurtgen, Marie ULg; Liu, Ji ULg; Debuigne, Antoine ULg et al

in Journal of Polymer Science. Part A, Polymer Chemistry (2012), 50(2), 400-408

Thermo-responsive block copolymers based on poly(N-vinylcaprolactam) (PNVCL) have been prepared by cobalt-mediated radical polymerization (CMRP) for the first time. The homopolymerization of NVCL was ... [more ▼]

Thermo-responsive block copolymers based on poly(N-vinylcaprolactam) (PNVCL) have been prepared by cobalt-mediated radical polymerization (CMRP) for the first time. The homopolymerization of NVCL was controlled by bis(acetylacetonato)cobalt(II) and a molecular weight as high as 46,000 g/mol could be reached with a low polydispersity. The polymerization of NVCL was also initiated from a poly(vinyl acetate)-Co(acac)2 (PVAc-Co(acac)2) macroinitiator to yield well-defined PVAc-b-PNVCL block copolymers with a low polydispersity (Mw/Mn = 1.1) up to high molecular weights (Mn = 87,000 g/mol), which constitutes a significant improvement over other techniques. The amphiphilic PVAc-b-PNVCL copolymers were hydrolyzed into unprecedented double hydrophilic poly(vinyl alcohol)-b-PNVCL (PVOH-b-PNVCL) copolymers and their temperature-dependent solution behavior was studied by turbidimetry and dynamic light scattering. Finally, the so-called cobalt-mediated radical coupling (CMRC) reaction was implemented to PVAc-b-PNVCL-Co(acac)2 precursors to yield novel PVAc-b-PNVCL-b-PVAc symmetrical triblock copolymers. [less ▲]

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See detailArsinoe II divinizzata al fianco del re vivente Tolemeo II. Uno studio di propaganda greco-egiziana.
Caneva, Stefano ULg

Scientific conference (2012, January 15)

A review of the Greek and Egyptian sources showing the deceased and divinized queen Arsinoe II on the side of the living king Ptolemy II. In addition to the cults of Arsinoe under the kingdom of her ... [more ▼]

A review of the Greek and Egyptian sources showing the deceased and divinized queen Arsinoe II on the side of the living king Ptolemy II. In addition to the cults of Arsinoe under the kingdom of her brother and husband Ptolemy II, I am interested to re-discuss the famous passage of Chremonides' decree where Arsinoe is mentioned among the models of Ptolemy's commitment to Greek freedom. [less ▲]

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See detailA modified economic-statistical design of the VP multivariate control charts
SEIF, Asghar; Faraz, Alireza ULg

Scientific conference (2012, January 15)

Hotelling’s T2 control chart is one of the most popular multivariate control charts for monitoring multiple variables simultaneously. Recent studies have shown that applying the T2 control chart by using ... [more ▼]

Hotelling’s T2 control chart is one of the most popular multivariate control charts for monitoring multiple variables simultaneously. Recent studies have shown that applying the T2 control chart by using a variable parameters (VP) scheme yields more rapid detection of assignable causes than the classical method of taking fixed sample sizes at fixed intervals of time. This paper presents an economic-statistical design (ESD) of the VP T2 control chart using the general model of Lorenzen and Vance. The genetic algorithm (GA) is then employed to search for the optimal values of the eight test parameters of the chart. Furthermore, VP and FRS schemes are compared with respect to the expect cost per unit time. [less ▲]

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