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See detailThe Producerist Narrative in Right-wing Flanders
Jamin, Jérôme ULg

Conference (2011)

Detailed reference viewed: 18 (1 ULg)
Peer Reviewed
See detailL'ordre marchand et le choc des civilisations
Delruelle, Edouard ULg

Conference (2011)

Detailed reference viewed: 11 (2 ULg)
See detailLa douleur chez les patients récupérant du coma
Chatelle, Camille ULg

Conference (2011)

Detailed reference viewed: 1 (0 ULg)
Peer Reviewed
See detailDeterminant and Impact on Outcome of Exercise Pulmonary Hypertension in Asymptomatic Severe Aortic Stenosis.
Magne, Julien ULg; Donal, E; O'Connor, K et al

Conference (2011)

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See detailL'inscription territoriale de la gestion des races animales : une recherche pluridisciplinaire
Steyaert, Patrick; Casabianca, François; Baret, Philippe et al

Conference (2011)

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See detailComa et état végétatif
Vanhaudenhuyse, Audrey ULg

Conference (2011)

Detailed reference viewed: 18 (2 ULg)
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See detailComputational FE² scheme for heterogeneous shell structures
Massart, Thierry J.; Mercatoris, Benoît ULg; Berke, Peter et al

Conference (2011)

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See detailEvaluation over Greenland of WRF with GC-NET observations (1995-2005) by comparison with 2 other RCMs
Sacré, Bernard ULg; Fettweis, Xavier ULg; Doutreloup, Sébastien ULg et al

Conference (2011)

In the context of climate change, the Greenland Ice Sheet (GrIS) plays an important role in sea level variation and oceanic thermohaline circulation changes. Unfortunately, Global Climate Models do not ... [more ▼]

In the context of climate change, the Greenland Ice Sheet (GrIS) plays an important role in sea level variation and oceanic thermohaline circulation changes. Unfortunately, Global Climate Models do not illustrate enough the characteristics of Greenland. To solve that, specific RCMs have been developed to take into account the features of polar regions. In this project, we compare three RCMs : the MAR model, the RACMO model and the Weather Research and Forecasting (WRF) model. WRF is an open source model developed by the Mesoscale and Microscale Meteorology Division of NCAR. We use here the standard WRF (version 3.2.1) and its polar optimization (called polar WRF). The MAR version tuned for the GrIS and coupled with a 1D surface scheme called SISVAT (for Soil Ice Snow Vegetation Atmosphere Transfer) is compared here. The version of RACMO is a specific version for the Greenland climate, RACMO2/GR. This model contains a special surface module for snow-ice treatment and other modifications concerning, for example, the surface turbulence heat flux or the surface roughness. The comparison is made on a domain centered on Greenland at a 25-km horizontal resolution over the 1995-2005 period when Automatic Weather Station (AWS) measurements are available from the Greenland Climate NETwork (GC-NET). Statistics (mean, bias, RMSE, correlation coefficient) are calculated for the near-surface temperature, surface pressure, 10m-wind speed and specific humidity for winter (October to April) and summer (May to September). In addition, the modeled snowfall are evaluated with ice core-based snow accumulation climatologies. Comparison shows a significant improvement from RCMs compared to the reanalyses (NCEP2 and ERA-INTERIM) in respect to the AWS measurements. RACMO and MAR seem to compare better with observations than WRF. [less ▲]

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See detail10 façons d’interpréter une neuropathie asymétrique
WANG, François-Charles ULg

Conference (2011)

Detailed reference viewed: 6 (0 ULg)
See detailIdentité reconstructive et dialogue des cultures
Delruelle, Edouard ULg

Conference (2011)

Detailed reference viewed: 10 (0 ULg)
Peer Reviewed
See detailThe hidden function of NIK (NF-κB-Inducing Kinase) in cell death
Boutaffala, Layla; Bertrand, Mathieu; Remouchamps, Caroline ULg et al

Conference (2011)

Detailed reference viewed: 29 (6 ULg)
Peer Reviewed
See detailActualités en droit des contrats
Kohl, Benoît ULg

Conference (2011)

Detailed reference viewed: 8 (1 ULg)
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See detailFinancial analysis of poultry commodity chains in Hanoi Suburb, North of Vietnam
Phan Dang, Thang; Vu Dinh, Ton; Dogot, Thomas ULg et al

Conference (2011)

Poultry production plays an important role in the structure of familial incomes in Vietnam but this activity is currently met with difficulties caused by the great influence of inputs/outputs on the ... [more ▼]

Poultry production plays an important role in the structure of familial incomes in Vietnam but this activity is currently met with difficulties caused by the great influence of inputs/outputs on the markets and the risks of epidemic diseases. This research was conducted for interviews and records according to book keeping among 280 poultry smallholders; 100 intermediary agents of poultry meat supply chains at the various scales of poultry supply chains and the diversification of poultry markets (poultry producers, private hatcheries, collectors of live poultry, slaughter houses and distributors of poultry meat) in Hanoi Suburb between 2009 and 2010. This research aimed at addressing to improving the income of small poultry producers and identifying the intermediary economic agents and its economic distributions. Furthermore, this research would like to solve restoring the poultry production and the various restraints faced of food contamination in poultry meat supply chains. Institutional organization and financial analysis approaches in different agents was used to calculate the value-added and to explain this problem in poultry meat commodity chains. Institutional organization of poultry meat supply chains is really complex with diverse economic agents. There are not many poultry meat products have a good traceability. These recent years, broiler industrial chickens and ducks met with some difficulties with the profits were very unstable or loss-making. But this industrial broiler chicken still occupies more and more an important role for the demand of domestic consumers. In addition, color broiler chickens were chosen for more satisfying the Vietnamese taste. In fact, local or color crossbred broiler chickens have a good economic performance but the output is still instable. Traders of live poultry and manual slaughter-house have a good economic performance caused by using the source of familial labor and selling directly to consumers. The systems of automatic skill of live poultry have still limited. The consumers do not be informed the useful information on food safety standards. [less ▲]

Detailed reference viewed: 93 (9 ULg)
See detailAging is associated with more intrusions errors but not more plagiarism errors
Perfect, Timothy James; Defeldre, Anne-Catherine; Elliman, Rachel et al

Conference (2011)

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See detailWhy do poverty reduction strategies not bring real effects in Northern Mountain, Vietnam ? Case of the commune of Xuan Phong and Tu Ly, Hoa Binh province
Mai, Lan Phuong ULg; Lebailly, Philippe ULg; Nguyen Mau, Dung

Conference (2011)

Agricultural accumulation has been one of the main source determined the social differentiation in Vietnamese countryside. The complexities of agrarian changes under the post - socialist industrialization ... [more ▼]

Agricultural accumulation has been one of the main source determined the social differentiation in Vietnamese countryside. The complexities of agrarian changes under the post - socialist industrialization with high rate of agricultural land conversion in recent context reveal the new forms of capital accumulation and social differentiation. This research investigates how land conversion process to industrial zones and clusters affected to the way that different groups of peasant households accumulate their resources. The study was carried out in 3 districts of Hung Yen province from 2006 to 2010. The study results are as follows: first, the land conversion to industrialization has impact on not only the decline of household landholdings but also the changes value of land which are the sources of social conflicts and informal land transfer. Second, in the context of land conversion to industrialization with tiny plots of land, low return from agricultural production and more opportunities of non-farm activities, even when non-farm employment is very profitable, peasant households are not likely to give up their land but maintaining agricultural production for not only their basic and secure livelihood but also for their identity. Third, among the affected peasant groups, the households with non-farm background tend to be in better position in engaging to high - earning activities. They are likely the rich peasants in opposed to the poor group with farming background and lost more than 50% of their agricultural land. This research has showed that the industrialization policies have to deal with the proportion of agricultural land would be transferred for industrialization zones and other measures in order to limit the conflicts as well as the social differentiation in countryside. [less ▲]

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See detailMOQUAC ? a Predictive GE-Model Based on Molecular Orientations
Bronneberg, Rob; Pfennig, Andreas ULg

Conference (2011)

Detailed reference viewed: 4 (0 ULg)
See detailMicrobial Diversity and Processes in Lake Kivu (East Africa)
Llirós, M.; Darchambeau, François ULg; Garcia-Armisen, T. et al

Conference (2011)

Lake Kivu is a deep meromictic and oligotrophic tropical African lake with a permanent thermal- and haline stratification with huge accumulations of dissolved CO2 and CH4 (ca. 300 km3 and 60 km3 ... [more ▼]

Lake Kivu is a deep meromictic and oligotrophic tropical African lake with a permanent thermal- and haline stratification with huge accumulations of dissolved CO2 and CH4 (ca. 300 km3 and 60 km3, respectively) in the deep anoxic monimolimnion (from 60 o 480 m depth). Although there are a wealth of information on the ecology of small eukaryotes and their trophic role on Kivu, available information on prokaryotic planktonic assemblages is scarce. Molecular analysis of archaeal and bacterial communities showed a vertical segregation imposed by the permanent redoxcline. In relation to Bacteria, Actinobacteria, Betaproteobacteria, Green Sulfur Bacteria and Bacteroidetes were the most commonly retrieved groups. For Archaea, a marked dominance of Thaumarchaeota and Crenarchaeota (75% of all archaeal OTUs) over Euryarchaeota was observed. In the anoxic hypolimnion, Euryarchaoeta (Methanosarcinales and Methanocellales) lineages together with Miscellaneous Crenarchaeotic Group phylotypes were mainly recovered. In turn, Thaumarchaeota phylotypes were recovered in oxic and suboxic waters. CARDFISH analyses over the first 100 m revealed the dominance of Bacteria (51.4% – 95.7% of DAPI-stained cells), especially Actinobacteria (epilimnion), Betaproteobacteria (oxic-anoxic interface) and Bacteroidetes (upper hypolimnion), over Archaea (1.0% – 4.5%; maximum abundances at the oxic-anoxic interface). In turn, flow cytometry evidenced the dominance of HNA cells in the euphotic layer, whereas the proportion of LNA cells increased with depth. HNA and LNA populations were still observed in the anoxic hypolimnion suggesting facultative or strict anaerobic metabolisms. The detection of distinct depth maxima of nitrate, nitrite, archaeal amoA and Marine Thaumarchaeota 16S gene copy numbers together with regularly detection of deep maxima of 3H-Thymidine uptake, and the presence of low-light adapted GSB species point towards a strong link of N, C, and S cycles in the redoxcline of Lake Kivu. [less ▲]

Detailed reference viewed: 67 (2 ULg)
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See detailN-type and p-type ultra shallow junctions by atomic layer epitaxy and laser anneal
Nguyen, Ngoc Duy ULg; Souriau, Laurent; Shimizu, Yasuo et al

Conference (2011)

Detailed reference viewed: 56 (2 ULg)
See detailExtraktion in hochviskosen Systemen
Kröckel, J; Adinata, D; Pfennig, Andreas ULg

Conference (2011)

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See detailRetirement incentives in Belgium
Jousten, Alain ULg

Conference (2011)

Detailed reference viewed: 7 (1 ULg)
See detailHafting and its impact on projectile tecnology
Rots, Veerle ULg

Conference (2011)

Detailed reference viewed: 9 (0 ULg)
Peer Reviewed
See detailThe Neandertals of Spy (Belgium) and their context: results of the radiocarbon dating program
Semal, P.; Hauzeur, Anne ULg; Rougier, H. et al

Conference (2011)

Detailed reference viewed: 26 (3 ULg)
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See detailThe dual role of weather forecasts on changes in activity-travel behavior
Cools, Mario ULg; Creemers, Lieve; Janssens, Davy et al

Conference (2011)

In previous studies, conflicting results could be found regarding the impact of weather forecasts on travel decisions, e.g. Khattak and De Palma (1997) found no significant effect of acquiring forecasted ... [more ▼]

In previous studies, conflicting results could be found regarding the impact of weather forecasts on travel decisions, e.g. Khattak and De Palma (1997) found no significant effect of acquiring forecasted weather information on the probability of adapting mode and departure time, whereas the results reported by Hagens (2005), Niina (2009) and Kilpelainen and Summala (2007) indicated that weather forecast do play an important role. Therefore this paper investigates the changes in activity-travel behavior in response to weather forecasts. The data for this study is collected by means of a stated adaptation survey, which is both administered on the internet and via a traditional paper and pencil questionnaire. In total, 595 respondents completed the survey. To obtain an optimal correspondence between the true population and the sample weights are assigned to the observation. Results indicate that weather information plays a dual role. On the one hand people do alter their activity-travel behavior in response to weather information, albeit these changes are not as pronounced when compared to actual weather. On the other hand the extent (frequency and media type) to which people are exposed to these weather forecasts appears to play only a marginal role. This dual role weather information plays in this study appears to be supported by the conflicting international literature and therefore revealing the underlying psychological motivations to change one's activity-travel behavior is a key challenge for further research. [less ▲]

Detailed reference viewed: 19 (1 ULg)
Peer Reviewed
See detailMolecular phylogeography of the common dormouse, Muscardinus avellanarius
Mouton, Alice ULg; Grill, Andrea; Sarà, Maurizio et al

Conference (2011)

Detailed reference viewed: 13 (0 ULg)
See detailL’évaluation de la réflexivité dans des portfolios électroniques dans le cadre d’un cours de Soins Palliatifs en formation médicale de base
Giet, Didier ULg; MASSART, Valérie ULg; Deum, Mélanie ULg et al

Conference (2011)

Le cours de Médecine Palliative est organisé en avant-dernière année des études médicales de 2e cycle par deux enseignants, Médecin Généraliste et Médecin Hospitalier. Ce cours a été dispensé pendant 10 ... [more ▼]

Le cours de Médecine Palliative est organisé en avant-dernière année des études médicales de 2e cycle par deux enseignants, Médecin Généraliste et Médecin Hospitalier. Ce cours a été dispensé pendant 10 ans selon un format traditionnel ex cathedra. Il était dispensé par de nombreux intervenants pluridisciplinaires. Une évaluation des enseignements a montré que les étudiants jugeaient les interventions trop théoriques, sans lien avec leurs questions et préoccupations. En conséquence, c’est la discipline « Médecine Palliative et de Soins de Vie » qui ne suscitaient pas d’intérêt. De nouveaux objectifs et de nouvelles modalités pédagogiques ont été introduits en 2010-2011 à l’attention de 100 étudiants. L’objectif principal est le développement chez les étudiants d’une attitude réflexive face à la discipline « Médecine Palliative ». Les outils pédagogiques introduits dans le dispositif sont le portfolio électronique, une vignette clinique évolutive, l’accompagnement à distance de chaque étudiant par un tuteur, des cours en présentiel. La pratique réflexive de chaque étudiant est évaluée au terme du dispositif, conjointement par les 2 enseignants sur base de critères et d’indicateurs. Voici une illustration des critères utilisés : - Intensité des interactions dans le carnet d’apprentissage électronique (et aux cours) - Pertinence des interventions - Engagement dans la tâche - Capacité réflexive (pertinence de l’analyse et de la régulation de la situation décrite dans la vignette) - Qualité de l’auto-évaluation et identification des éléments déclencheurs de progrès - Degré d’apprentissage (Bilan d’atteinte des objectifs fixés par le cours et décrits) La communication orale présentera le dispositif d’évaluation, les critères et les indicateurs utilisés, les premiers résultats de l’évaluation des étudiants, les perspectives de régulation du dispositif d’évaluation. [less ▲]

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See detailThe Herschel view of nebulae around evolved massive stars
Vamvatira-Nakou, Chloi ULg; Royer, P.; Hutsemekers, Damien ULg et al

Conference (2011)

The detailed study of the nebulae ejected from Luminous Blue Variables and the circumstellar bubbles around Wolf-Rayet stars, which radiate strongly in the IR due to the heating of dust, is crucial for ... [more ▼]

The detailed study of the nebulae ejected from Luminous Blue Variables and the circumstellar bubbles around Wolf-Rayet stars, which radiate strongly in the IR due to the heating of dust, is crucial for understanding the massive stars evolution. With Herschel, the largest telescope ever flown in space, we are able to study the gas and the dust in these circumstellar environments in the full far-infrared waveband. In the context of 'Mass-loss of Evolved StarS' Herschel guaranteed time key programme, we have obtained imaging and spectroscopic observations of nebulae associated with Luminous Blue Variable and Wolf-Rayet stars using PACS, one of the three instruments onboard Herschel. A description of these observations and first results of the data analysis are presented. [less ▲]

Detailed reference viewed: 51 (35 ULg)
See detailThermal model reduction using the super-face concept
Masset, Luc ULg; Bruls, Olivier ULg; Kerschen, Gaëtan ULg

Conference (2011)

The objective of this presentation is to carry out thermal model reduction in the context of the finite element method. The finite element model is decomposed in several sets of adjacent faces called ... [more ▼]

The objective of this presentation is to carry out thermal model reduction in the context of the finite element method. The finite element model is decomposed in several sets of adjacent faces called super-faces. Specialized algorithms such as the METIS partitioning algorithm are used to automatically generate the super-faces. Several constraints may be imposed, e.g., the size of the super-face, its aspect ratio or its aperture angle. Once the model is decomposed, view factors between super-faces are calculated with direct numerical integration or ray-tracing methods. This method offers a very substantial reduction of the computational burden compared to the full model, which is particularly interesting for pre-design studies or specific applications such as deployable structures. [less ▲]

Detailed reference viewed: 37 (13 ULg)
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See detailNegations at Medinet Habu
Gillen, Todd Jonathan ULg

Conference (2011)

Detailed reference viewed: 13 (3 ULg)
See detailLC-MS for metabolomics
Fillet, Marianne ULg

Conference (2011)

Detailed reference viewed: 13 (0 ULg)
Peer Reviewed
See detailCharcoal production at mound kiln sites affects pedogenesis and soil capacity to stabilize organic carbon
Cornelis, Jean-Thomas ULg; hardy, Brieuc; Delvaux, Bruno et al

Conference (2011)

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See detailAnalyse des pigments des dessins pariétaux de la grotte Chauvet à Vallon-Pont-d'Arc
Laval, Eric; Salomon, Hélène ULg; Vignaud, Colette et al

Conference (2011)

Detailed reference viewed: 66 (3 ULg)
See detailTrou du Renard and ongoing work on the Aurignacian of the far North
Dinnis, Rob; Flas, Damien ULg

Conference (2011)

Detailed reference viewed: 5 (0 ULg)
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See detailNew insights on the role of root radial conductivity on the overall uptake dynamics
Lobet, Guillaume ULg; Javaux, M.; Couvreur, V. et al

Conference (2011)

Detailed reference viewed: 9 (1 ULg)
See detailDépister au quotidien les indications pour les gestions d'alvéoles
LAMBERT, France ULg

Conference (2011)

Chacun d’entre nous est familier avec la résorption typique de la crête alvéolaire après l’extraction d’une dent. Cette perte de tissus, entraîne fréquemment la nécessité de reconstructions osseuse ... [more ▼]

Chacun d’entre nous est familier avec la résorption typique de la crête alvéolaire après l’extraction d’une dent. Cette perte de tissus, entraîne fréquemment la nécessité de reconstructions osseuse élaborées, si l’objectif est de restaurer la ou le- dents extraite(s) avec des implants dentaires. Cet exposé vise d’abord à évaluer le bénéfice et les indications des gestions des alvéoles d’extraction afin de limiter les pertes tissulaires post-extractionnelles. [less ▲]

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See detailEco-Ethology of bonobos, Pan paniscus, in West Democratic Republic of Congo; why are critical data so important for long-term conservation programs?
Serckx, Adeline ULg; Huynen, Marie-Claude ULg; Beudels-Jamar, Roseline

Conference (2011)

The Bonobo could be one of the species facing the biggest conservation challenge in the years to come. Endemic to the West Democratic Republic of Congo (DRC), its survival depends exclusively on the ... [more ▼]

The Bonobo could be one of the species facing the biggest conservation challenge in the years to come. Endemic to the West Democratic Republic of Congo (DRC), its survival depends exclusively on the management measures taken by a country having to deal concomitantly with many problems affecting its development, i.e. demographic explosion, poverty, insecurity and deforestation. But the survival of bonobos, classified as Endangered by IUCN (2010) and restricted to a relatively small range, will require newly designated and effective protected areas. This will imply long-term conservation programs, taking into account the bonobos’ populations requirements, as well as the local socio-economic needs and realities. In 2005, a large population of bonobos has been identified in Western DRC, in a rather eccentric part of the species range compare with the best known populations inhabiting the rainforest of center DRC. The Western region, known as the Lake Tumba Landscape, is characterized by a relatively poor rural human population, an active bushmeat trade, and is divided into several logging concessions and cattle ranches. In 2007, WWF initiated a vast conservation program in the area, including an eco-tourism project involving the habituation of 2 bonobos populations. Until now, only sparse information has been gathered but preliminary studies indicate that habitat use by bonobos – a forest-savannah mosaic – differs substantially from that of other known populations. The objective of the research is to define the eco-ethological profile of those 2 populations. For this purpose, we will characterize diet and food preferences, examine population density and try to identify factors inducing nesting sites’ choice. This information will help understanding habitat use by bonobos in the Western region, and should allow us to come up with specific management measures to be adopted by logging concessions, WWF and ICCN as part of the region’s conservation program. [less ▲]

Detailed reference viewed: 37 (3 ULg)
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See detailSecond harmonic generation as a tool to probe the interactions of peptides with membrane-mimicking interfacial monolayers
Benichou, Emmanuel; Duboisset, Julien; Matar, Gladys et al

Conference (2011)

Detailed reference viewed: 23 (2 ULg)
See detail(In)visible Bodies: Crossing Racial Lines in the Graphic Novel
Dony, Christophe ULg

Conference (2011)

Detailed reference viewed: 18 (0 ULg)
Peer Reviewed
See detailSystemic resistance induced by Bacillus amyloliquefaciens S499 and root colonization is influenced by short exposure to environmental stress
Pedrotti, L.; Hosni, T.; Leoni, V. et al

Conference (2011)

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See detailMotives to begin physical education studies. Comparative analysis in Algeria and Wallonia
Kerfes, Nabil; Alem, Jaouad; Cloes, Marc ULg

Conference (2011)

There are many reasons explaining why students choose one professional project and/or an academic programme. Usually, they consider higher education according to various aspects focusing on the content of ... [more ▼]

There are many reasons explaining why students choose one professional project and/or an academic programme. Usually, they consider higher education according to various aspects focusing on the content of the programme as well as on professions to which the latter leads. This study is in the field on comparative education. It offers a comprehensive reading of two education systems in a spirit of openness and expansion of knowledge. With inspiration from two studies conducted in the education of physical educators in very different cultural contexts (Research Group MJS, 1993, for Algeria – Groupe de recherche interuniversitaire, 2003, for French-speaking Belgium), we have assumed that the students’ motives for registering in studies in physical education should differ considerably. The purpose of this research has therefore been to determine the reasons motivating students to begin a physical education programme at the university or at a non university context. Our research was based, firstly, on the analysis of official texts concerning the organization of higher education in the field of physical education and, secondly, on data collected from the actions involved in four educational institutions, two in the Algiers region and two in the Liege region. In both cultural contexts, one institution belonged to one university and the other one was organized in a non university context. Our results relate to a total sample of 290 subjects (40 members of teaching staffs, 108 students and 142 graduates). The staff members were interviewed while the subjects of two other groups have responded to questionnaires. The Arabic version of each instrument was translated from an original French version. One expert has assured the validity check. In this paper, we are focusing our attention on the analysis of the responses provided by the three types of actors to a question aiming to identify, through four levels Lickert scales, the degree of importance accorded by subject to nine reasons of registration for studies in physical education. Answer were encoded in a computer database and processed using the Statistica software (Stat Soft, 2006). No significant difference was identified when comparing the answers of respondents. However, we noticed that the love of sport and the desire to do sport belonged to the most important reasons for the registration of the new students for training programs in physical education. Cultural context does not seem to affect the opinions of the subjects. [less ▲]

Detailed reference viewed: 77 (3 ULg)
See detailTerritorial observation (T3) - Discussion report
Breuer, Christophe ULg

Conference (2011)

Detailed reference viewed: 67 (5 ULg)
See detailVeneered zirconia in prosthodontics : understanding failures.
MAINJOT, Amélie ULg

Conference (2011)

Detailed reference viewed: 18 (0 ULg)
See detailE.coli virulence factors
Mainil, Jacques ULg

Conference (2011)

Detailed reference viewed: 20 (1 ULg)
See detailAn X-ray view on ultrafast magnetization switching of GdFeCo
Radu, Ilie; Vahaplar, Kadir; Kirilyuk, Andrei et al

Conference (2011)

Detailed reference viewed: 9 (0 ULg)
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See detailEtude d'art mobilier en laboratoire par des techniques non destructives : analyse par faisceau d'ions et micro-diffraction pour caractériser les pigments préhistoriques et identifier leurs origines. Exemples de l'abri Pataud (Dordogne) et d'Arcy- sur-Cure (Yonne)
Beck, Lucile; Grégoire, Sylvain; Lebon, Matthieu et al

Conference (2011)

Les pigments préhistoriques sont formés à partir de composés naturels tels les d’oxydes de fer ou les oxydes de manganèse. Ils ont été collectés par les hommes préhistoriques dans leur environnement ... [more ▼]

Les pigments préhistoriques sont formés à partir de composés naturels tels les d’oxydes de fer ou les oxydes de manganèse. Ils ont été collectés par les hommes préhistoriques dans leur environnement proche ou parfois à de grandes distances. Connaître leur provenance géographique, ou à défaut établir des relations entre matière première retrouvée en fouille et objets archéologiques décorés, pourraient permettre de retracer la mobilité des populations et d’appréhender les choix techniques opérés ou la mise en place des décors.Ces relations et provenances peuvent être établies à partir de la composition chimique des matériaux employés. Il a été notamment démontré, que pour les obsidiennes ou les minéraux précieux tels les grenats ou les rubis, la nature et la concentration des éléments traces sont caractéristiques des milieux géologiques dans lesquels ils ont été formés. Dans le cadre de Madapca, la même démarche a été appliquée aux pigments préhistoriques. Elle s’appuie principalement sur la méthode d’analyse non destructive PIXE (Particule Induced X-ray Emission) et a été développée pour des pigments provenant des sites d’Arcy sur Cure (Châtelperronien, 32 000 BP) et de l’Abri Pataud (niveau Proto-Magdalénien, 22 000 BP). L’analyse élémentaire des éléments majeurs, mineurs et traces a permis de mettre en évidence des groupes de pigments de composition distincte au sein des niveaux archéologiques étudiés, et donc l’utilisation de sources de matière premières différentes. Dans le cas de l’Abri Pataud (Dordogne), il a été possible d’établir des correspondances entre la composition chimique des blocs de matière première composés d’oxydes de fer et celle des décors peints sur des éléments mobiliers ou sur les écailles ornées provenant de l’effondrement du plafond de l’abri. Dans le cas d’Arcy-sur-Cure (Yonne), nous avons pu montrer que la teneur en éléments traces variaient en fonction de la provenance des blocs de pigments rouges et noirs, trouvés en nombre dans la grotte du Renne. Cette étude démontre l’intérêt des techniques de spectrométrie X pour la différentiation des matériaux colorants utilisés en contexte préhistorique. [less ▲]

Detailed reference viewed: 41 (2 ULg)
See detailInfluence of electrolytes on liquid-liquid separation
Chuttrakul, P; Kopriwa, N; Ruckes, S et al

Conference (2011)

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See detailEvolution of livelihood strategy and income of the households in the coastal sandy area of the Central region, Vietnam : the case of Thua Thien Hue Province during period 2003-2008
Nguyen Dang, Hao; Lebailly, Philippe ULg

Conference (2011)

Based on livelihood approach and using both livelihood strategy participatory assessment and household survey data this study mainly focus on assessment of evolution of livelihood strategy and income of ... [more ▼]

Based on livelihood approach and using both livelihood strategy participatory assessment and household survey data this study mainly focus on assessment of evolution of livelihood strategy and income of households in the Coastal Sandy Zone of Thua Thien Hue Province. Findings indicated that livelihood strategies are very dynamic and considerable difference between the wealth categories of households and among the study sites. Although agriculture –based strategy is one of the most popular among the livelihood strategies there are considerable changes. Thanks to more specialization on livestock - non-farm business – aquaculture the better-off category has increased rapidly their income during 2003-2008 period. By contrast, due to more dependence on food crop, wage work and migration, income of the poor slowly improved at the same period. These findings implicate that in the context of rural development, support policies introduced by government have positively influenced on household income, but these general policies cannot meet the development needs from various locations as well as different household categories because there is marked difference in livelihood assets, human source, landholding, financial and social capitals in particular. [less ▲]

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See detailHow to measure GFR in the year 2011?
DELANAYE, Pierre ULg

Conference (2011)

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See detailComparative magnetotail flapping: Overview of observations at Earth, Jupiter and Saturn
Volwerk, M.; Andre, N.; Arridge, C. et al

Conference (2011)

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Peer Reviewed
See detailElectro-assisted assembly of Aliphatic Thiol, Dithiol and Dithiocarboxylic Acid Monolayers on Polycrystalline Copper Substrates
Maho, Anthony ULg; Denayer, Jessica; Delhalle, Joseph et al

Conference (2011)

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Peer Reviewed
See detailHay transfer to restore rupestrian fields, physiognomy of Cerrado threatened by land-use changes
Le Stradic, Soizig ULg; Buisson, Elise; Fernandes, Geraldo Wilson

Conference (2011)

Detailed reference viewed: 14 (1 ULg)
See detailSimulation of Reactive Extraction Columns Based on Lab-scale Experiments with Single Drops
Kalem, Murat; Buchbender, Florian; Pfennig, Andreas ULg

Conference (2011)

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See detailMystique, science, politique : trois voies pour l'humanité ?
Caeymaex, Florence ULg

Conference (2011)

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Peer Reviewed
See detailDeux niveaux d'étude en mathématique
Schneider-Gilot, Marguerite ULg

Conference (2011)

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Peer Reviewed
See detailRelationships between the structure of P-doped TiO2 xerogels and their photocatalytic properties
Bodson, Céline ULg; Cattoën, Xavier; Bied, Catherine et al

Conference (2011)

TiO2 heterogeneous photocatalysis has been the subject of numerous recent investigations as it is an attractive technique for the complete destruction of undesirable contaminants both in aqueous and ... [more ▼]

TiO2 heterogeneous photocatalysis has been the subject of numerous recent investigations as it is an attractive technique for the complete destruction of undesirable contaminants both in aqueous and gaseous phase by using solar or artificial light illumination. However, TiO2-based materials present a large band gap and therefore only a small fraction of solar light, in the UV region, can be utilized. Furthermore, anatase-TiO2 transforms to the rutile structure at temperatures relatively lower, which greatly reduces surface areas of the particles resulting in the decrease in photocatalytic ability of TiO2. To counter both disadvantages, several studies have been conducted by doping non-metallic elements, such as phosphor, into the Ti-O framework to form TiO2 solutions. In the present study, a sol-gel method is developed to synthesize P-doped TiO2 xerogels by a cogelation method based on the hydrolysis and the condensation of Ti(OC3H7)4 with functionalized P alkoxides: NH2-(CH2)2-NH-(CH2)2-P(O)-(OC2H5)2, or (C2H5O)2-P(O)-(CH2)7-CH3, in various alcohols. These xerogels are dried at 150°C under vacuum for 24 h, and calcined under air for 6 h at 350°C, 450°C, 550°C and 650°C. The resulting materials were characterized by TG-ATD, TEM, XRD, nitrogen adsorption-desorption isotherms, FT-IR and diffuse reflectance measurements in the UV/Vis region. It was found that the phosphor-doped species could significantly increase the surface area of the materials. Moreover, the phosphor-doping improved the thermal stability of titania and decreased the phase transformation of anatase to rutile. Diffuse reflectance measurements proved that the modification by phosphor shifted the absorption edge of titania to the visible region, making it an effective photocatalyst in visible light. This is shown by the degradation of p-nitrophenol under visible light irradiation. The excellent photocatalytic activity of P-doped TiO2 xerogels compared to pure TiO2 could be explained by its high surface area and small crystallite size. [less ▲]

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See detailDiscovery and characterization of an ozone layer in Venus’atmosphere
Montmessin, F.; Bertaux, J.-L.; Lefèvre, F. et al

Conference (2011)

Detailed reference viewed: 12 (0 ULg)