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See detailTrends of CO2, CH4 and N2O over 1985-2010 from high-resolution FTIR solar observations at the Jungfraujoch station
Duchatelet, Pierre ULg; Mahieu, Emmanuel ULg; Zander, Rodolphe ULg et al

in Geophysical Research Abstracts (2010), 12(EGU2010-15418-2),

Two state-of-the-art Fourier Transform Infrared (FTIR) spectrometers are operated at the Jungfraujoch station (46.5ºN, 8.0ºE, 3580m asl) within the framework of the Network for the Detection of ... [more ▼]

Two state-of-the-art Fourier Transform Infrared (FTIR) spectrometers are operated at the Jungfraujoch station (46.5ºN, 8.0ºE, 3580m asl) within the framework of the Network for the Detection of Atmospheric Composition Change (NDACC, visit http://www.ndacc.org). The earliest FTIR observations have been obtained there in 1984. Since then, regular recordings of high-resolution solar absorption spectra have been performed at that site, under clear-sky conditions, allowing to collect almost 29000 observations relevant to the present communication. We present time series of three greenhouse gases targeted by the Kyoto Protocol: CO2, CH4 (and its isotopologue 13CH4) and N2O. These data sets have been obtained with the SFIT-2 algorithm which implements the Optimal Estimation Method of Rodgers (1990). This allows retrieving total columns of the target gases as well as information on their distribution with altitude. For the methane isotopologues and N2O, a Tikhonov L1 regularization scheme has been applied, as part of an harmonization effort carried out within the European HYMN project (see also Dils et al, 2010; Foster et al., 2010). Trends –and their associated uncertainties– characterizing these long series as well as the seasonal modulations have been determined with a statistical tool using bootstrap resampling (Gardiner et al., 2008). Trend values will be presented and critically discussed; in particular, we will investigate if significant changes in the rate of accumulations of these four atmospheric gases occurred over the last 25 years. Numerous additional greenhouse gases are accessible to the FTIR technique. Examples of such trend studies are reported at the EGU General Assembly by Mahieu et al. (2010) and Rinsland et al. (2010). [less ▲]

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See detailDamage Diagnosis of Beam-like Structures Based on Sensitivities of Principal Component Analysis Results
Nguyen, Viet Ha ULg; Golinval, Jean-Claude ULg

in IMAC-XXVIII A Conference on Structural Dynamics (2010)

This paper addresses the problem of damage detection and localization in linear-form structures. Principal Component Analysis (PCA) is a popular technique for dynamic system investigation. The aim of the ... [more ▼]

This paper addresses the problem of damage detection and localization in linear-form structures. Principal Component Analysis (PCA) is a popular technique for dynamic system investigation. The aim of the paper is to present a damage diagnosis method based on sensitivities of PCA results in the frequency domain. Starting from Frequency Response Functions (FRFs) measured at different locations on the beam, PCA is performed to determine the main features of the signals. Sensitivities of principal directions obtained from PCA to beam parameters are then computed and inspected according to the location of sensors; their variation from the healthy state to the damaged state indicates damage locations. It is worth noting that damage localization is performed without the need of modal identification. Once the damage has been localized, its evaluation may be quantified if a structural model is available. This evaluation is based on a model updating procedure using previously estimated sensitivities. The efficiency and limitations of the proposed method are illustrated using numerical and experimental examples. [less ▲]

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See detailLe langage spontané des enfants prématurissimes : analyse du langage descriptif et informatif
Grooteclaes, Vanessa; Docquier, Laurence ULg; Maillart, Christelle ULg

in Glossa (2010), 108

The limits of prematurity don’t stop moving back and very premature children with a very low birth weight survive. Since a short time studies have been conducted on the cognitive and language evolution of ... [more ▼]

The limits of prematurity don’t stop moving back and very premature children with a very low birth weight survive. Since a short time studies have been conducted on the cognitive and language evolution of those children. This present study aims to determine the nature of language repercussions of extremely prematurity birth by focusing more particularly on spontaneous language. Language performances of 23 children born at less than 26 weeks of gestational age will be compared to the ones of 23 children born at term, paired by age (between 6 and 8 years old), sex and sociocultural level. Two tasks will be compared : a task of descriptive language (narration based on pictures) and a test of informative language in which the child will have to transmit some precise information on the realization of familiar actions. The children’s productions have been written down, then analysed from a lexical, syntactic and semantic point of view. Results show that the two groups of children do not differ in the task of descriptive language but differences emerge in the task of informative language. On lexical level the richness and variety of words used by premature children seem poorer than the ones used by children born at term. From the syntactic point of view the average length of utterances of premature children is inferior to the one of children born at term. At last the semantic analyses show that the premature children express less ideas and that the semantic content of the given ideas is less rich in comparison with the children born at term. In conclusion this study suggests that the discursive level of highly premature children mustn’t only be tested with descriptive tasks but also with informative tasks which seem more sensible to the specific weaknesses of that population. [less ▲]

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See detailMise en relation de l'évolution de l'agriculture et de la qualité de l'eau entre 1950 et 2000
Vandenberghe, Christophe ULg

in Vandenberghe, Christophe; Marcoen, Jean Marie (Eds.) Atelier "Nitrate - Eau". 2 au 5 juin 2009. Peyresq, France (2010)

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See detailEvaluation de l'efficacité des cultures intermédiaires pièges à nitrate (CIPAN) en novembre
Vandenberghe, Christophe ULg; Lambert, Richard; Marcoen, Jean Marie ULg

in Vandenberghe, Christophe; Marcoen, Jean Marie (Eds.) Actes de l'Atelier "Nitrate - Eau" 2 au 5 juin 2009. Peyresq, France (2010)

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See detailSpatiotemporal variations of fCO(2) in the North Sea
Omar, A. M.; Olsen, A.; Johannessen, T. et al

in Ocean Science (2010), 6(1), 77-89

Data from two Voluntary Observing Ship (VOS) (2005-2007) augmented with data subsets from ten cruises (1987-2005) were used to investigate the spatiotemporal variations of the CO2 fugacity in seawater ... [more ▼]

Data from two Voluntary Observing Ship (VOS) (2005-2007) augmented with data subsets from ten cruises (1987-2005) were used to investigate the spatiotemporal variations of the CO2 fugacity in seawater (fCO(2)(sw)) in the North Sea at seasonal and inter-annual time scales. The observed seasonal fCO(2)(sw) variations were related to variations in sea surface temperature (SST), biology plus mixing, and air-sea CO2 exchange. Over the study period, the seasonal amplitude in fCO(2)(sw) induced by SST changes was 0.4-0.75 times those resulting from variations in biology plus mixing. Along a meridional transect, fCO(2)(sw) normally decreased northwards (-12 mu atm per degree latitude), but the gradient disappeared/reversed during spring as a consequence of an enhanced seasonal amplitude of fCO(2)(sw) in southern parts of the North Sea. Along a zonal transect, a weak gradient (-0.8 mu atm per degree longitude) was observed in the annual mean fCO(2)(sw). Annually and averaged over the study area, surface waters of the North Sea were CO2 undersaturated and, thus, a sink of atmospheric CO2. However, during summer, surface waters in the region 55.5-54.5 degrees N were CO2 supersaturated and, hence, a source for atmospheric CO2. Comparison of fCO(2)(sw) data acquired within two 1 degrees x1 degrees regions in the northern and southern North Sea during different years (1987, 2001, 2002, and 2005-2007) revealed large interannual variations, especially during spring and summer when year-to-year fCO(2)(sw) differences (approximate to 160-200 mu atm) approached seasonal changes (approximate to 200-250 mu atm). The springtime variations resulted from changes in magnitude and timing of the phytoplankton bloom, whereas changes in SST, wind speed and total alkalinity may have contributed to the summertime interannual fCO(2)(sw) differences. The lowest interannual variation (10-50 mu atm) was observed during fall and early winter. Comparison with data reported in October 1967 suggests that the fCO(2)(sw) growth rate in the central North Sea was similar to that in the atmosphere. [less ▲]

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See detailConceptual model of integrated apiarian consultancy
Bodescu, Dan; Stefan, Gavril; Paveliuc Olariu, Codrin ULg et al

in Scientific Papers. Series Management, Economic, Engineering in Agriculture and Rural Development (2010), 10(3), 47-51

The socio-economic field researches have indicated the necessity of realizing an integrated consultancy service for beekeepers that will supply technical-economic solutions with a practical character for ... [more ▼]

The socio-economic field researches have indicated the necessity of realizing an integrated consultancy service for beekeepers that will supply technical-economic solutions with a practical character for ensuring the lucrativeness and viability of the apiaries. Consequently, an integrated apiarian consultancy model has been built holding the following features: it realizes the diagnosis of the meliferous resources and supplies solutions for its optimal administration; it realizes the technical-economic of the apiarian exploitation adapted according to its objectives and identifies its optimal administration measures; it manages the local pollination services market; it realizes viable investment projects and ensures the management of their implementation; it elaborates aggregated indicators as efficient instruments of analysis and utilizes and informatics application of apiarian management used for realizing the specific objectives of the apiaries; it integrates the technical, economic and juridical consultancy service. [less ▲]

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See detailPrevalence and sources of Campylobacter spp. contamination in free-range broiler production in the southern part of Belgium
Vandeplas, Sabrina ULg; Dubois Dauphin, Robin ULg; Palm, Rodolphe ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2010), 14(2), 279-288

A one year epidemiological study was carried out between February 2005 and January 2006 in the southern part of Belgium to assess the Campylobacter prevalence in free-range broiler production. Three ... [more ▼]

A one year epidemiological study was carried out between February 2005 and January 2006 in the southern part of Belgium to assess the Campylobacter prevalence in free-range broiler production. Three successive broiler flocks from six Belgian farms were investigated for the presence of Campylobacter spp. during the rearing period. Each flock was visited four times, before and after the outdoor rearing period. During each visit, samples were taken in the broiler house (litter, cecal droppings, water-lines, feed, anteroom) as well as from the outer rearing environment (open-air range). The Campylobacter detection in all samples was carried out according to the ISO 10272 standard. Identification was based on colonial morphology, microscopic examination, and biochemical tests. PCR multiplex was used for genetic confirmation. Campylobacter jejuni was the main species isolated from all contaminated samples. Overall, mixed infections C. jejuni/C. coli represented 40.6%, while C. jejuni and C. coli represented 46.9% and 12.5% of chicken samples respectively. A 100% flock contamination was observed in the 6 farms during the summer/autumn period, whereas only 66.7% and 33.3% of the flocks became Campylobacter-positive in spring and winter respectively, at the end of the rearing period. Half of contaminated flocks were infected before chickens have access to the open-air range. Environmental samples, especially the open-air range soil, were found to be Campylobacter-positive before flock infection. The other potential sources of contamination were delivery tray, anteroom floor and water-lines. Other animal productions like cattle on the farm, no applied rodent control, no cleaning and disinfection of water-lines between flocks, no detergent used for cleansing and thinning were recorded as risk factors. In conclusion, the contact with the environment, particularly the access to an open-air range, appeared to be the major way of Campylobacter contamination of chickens in free-range broiler production. [less ▲]

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See detailImpacts écologiques des aménagements touristiques sur le littoral de Saïdia, Maroc oriental
Boumeaza, Taieb; Sbai, Abdelkader; Salmon, Marc ULg et al

in Revue géographique des pays méditerranéens (2010), 115

Le littoral de Saïdia est connu depuis fort longtemps pour sa plage naturelle dont l’évolution est dépendante d’une part des alluvions apportées par la Moulouya qui avait permis l’engraissement de ce ... [more ▼]

Le littoral de Saïdia est connu depuis fort longtemps pour sa plage naturelle dont l’évolution est dépendante d’une part des alluvions apportées par la Moulouya qui avait permis l’engraissement de ce littoral, créant un delta avant la construction des barrages et d’autre part des courants marins responsables de la redistribution des sables le long de la côte. Actuellement, ce littoral subit une pression anthropique aggravée, due à la construction d’une station balnéaire et d’une marina à proximité immédiate de la côte. Ceci a provoqué un déséquilibre du système dunaire et a bouleversé les mécanismes d’évolution du littoral, avec des impacts directs sur l’environnement écologique de la zone humide de la Moulouya. [less ▲]

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See detailA Virtualization-Based Retrieval and Update API for XML-Encoded Corpora
Briquet, Cyril; Renders, Pascale ULg; Petitjean, Etienne

in Proceedings of Balisage: The Markup Conference 2010 (2010)

Providing support for flexible automated tagging of text-oriented XML documents (i.e. text with intersparsed markup) is a challenging issue. This requires support for tag-aware full text search (i.e. the ... [more ▼]

Providing support for flexible automated tagging of text-oriented XML documents (i.e. text with intersparsed markup) is a challenging issue. This requires support for tag-aware full text search (i.e. the capability to skip some tags or make invisible whole sections of the document), match points, and transparent updates. An API addressing this issue is described. Based on the virtualization of selected sections of the XML document, the API produces a tag-aware representation, backed by the document, that is transparently searchable (using keyword search or regular expressions) and updatable, offering support for natural linguistic reasoning. [less ▲]

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See detailLes indicateurs de l'enseignement
Baye, Ariane ULg; Danhier, Julien; Deny, Eric et al

Report (2010)

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See detailRevue Internationale des Droits de l'Antiquité LVII (2010) (parue en septembre 2011)
Gerkens, Jean-François ULg

in Revue Internationale des Droits de l'Antiquité (2010), LVII

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See detailThérapie cellulaire de réparation tissulaire cardiaque par cellules souches hématopoïétiques et mésenchymateuses.
DELGAUDINE, Marie ULg

Doctoral thesis (2010)

Les scientifiques définissent les cellules souches (CS) en se basant sur 3 critères (Fig.1): (1) les CS sont douées de capacités d’auto-renouvellement qui leur permettent de maintenir leur « pool » stable ... [more ▼]

Les scientifiques définissent les cellules souches (CS) en se basant sur 3 critères (Fig.1): (1) les CS sont douées de capacités d’auto-renouvellement qui leur permettent de maintenir leur « pool » stable ; (2) une CS peut se différencier en plusieurs types de cellules fonctionnelles matures. Par exemple, les cellules souches hématopoïétiques (CSH) sont à l’origine des cellules sanguines ; les cellules souches neurales (CSN) donnent naissance aux neurones, astrocytes et oligodendrocytes ; les cellules souches mésenchymateuses (CSM) peuvent se différencier en fibroblastes, ostéoblastes, chondroblastes et adipocytes ; (3) les cellules souches peuvent repeupler un tissu lésé pour en restaurer la fonction, comme notamment, après une irradiation. [less ▲]

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See detailMartin pêcheur d'Europe, Alcedo atthis
Dehem, Christophe; Hallet, Catherine; Libois, Roland ULg

in Jacob, Jean Paul; Dehem, Christophe; Burnel, André (Eds.) et al Atlas des oiseaux nicheurs de Wallonie 2001/ 2007 (2010)

The kingfisher is widespread in Wallonia but is missing locally in middle Belgium and in higher Ardenne. The field prospection for the atlas took place in a favorable climatic context; the current ... [more ▼]

The kingfisher is widespread in Wallonia but is missing locally in middle Belgium and in higher Ardenne. The field prospection for the atlas took place in a favorable climatic context; the current population, estimated at 450 650 pairs, reflects probably the saturation of the habitat. The highest densities are found along large rivers, with important fishing ressources and numerous nesting sites (Lesse, Ourthe, Semois, Viroin). The limiting fator seems to be the lack of nesting sites. [less ▲]

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See detailGuidelines on myocardial revascularization.
Kolh, Philippe ULg; Wijns, William; Danchin, Nicolas et al

in European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery (2010), 38 Suppl

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See detailGrands ou petits attentats ? Mesure de l’impact des réformes orthographiques sur la physionomie des textes
Dister, Anne; Purnelle, Gérald ULg; Beaufort, Richard

in Bolasco, Sergio (Ed.) Proceedings of the JADT 2010, 10th International Conference on the Statistical Analysis of Textual Data, Rome, 9-11 June 2010 (2010)

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See detailThe Poetics of Dissolution: The Representation of Maori Culture in Janet Frame's Fiction
Gabrielle, Cindy ULg

in Journal of Postcolonial Writing (2010), 46(2), 209-220

This essay examines Janet Frame's early short story "The Lagoon", and argues that the story alludes to Maori experience, albeit tangentially, in a way which anticipates similar evocations in novels such ... [more ▼]

This essay examines Janet Frame's early short story "The Lagoon", and argues that the story alludes to Maori experience, albeit tangentially, in a way which anticipates similar evocations in novels such as A State of Siege and The Carpathians. A close reading shows that cultural imperialism in Frame runs parallel to, or is a side-effect of, interpersonal appropriations. These, in turn, seem to be rooted in human beings' reluctance to accommodate otherness. Recurrently Janet Frame points to a model of cultural and interpersonal interaction which is detached from proprietorial forms of appropriation, but which entails nothing less than the dissolution of the ruling ego. Selfdissolution shall emerge in this reading as the key to a utopian state consisting of the total permeability between the self and the remainder of the world. In this state, transactions become reciprocal since the divisions between self and non-self no longer exist. [less ▲]

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