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See detailRole of double-stranded DNA in allergic airway inflammation.
Marichal, Thomas ULg

Conference (2016)

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See detailVietnam's fisheries and aquaculture development’s policy: are exports performance targets sustainable?”
Nguyen Thi Khanh Hong, ULg; Phan Thi Thu Hien; Tran Thi Nang Thu et al

Conference (2016)

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See detailPain assessment and treatment
Chatelle, Camille ULg

Conference (2016)

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See detailGovernance the chicken chain in Vietnam: a case study in Kim Dong District, Hung Yen Province
Tran Huu, Cuong; Bui Thi, Nga; Lebailly, Philippe ULg

Conference (2016)

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See detailRecycled and bio-based materials for sustainable construction
Courard, Luc ULg

Conference (2016)

Recycling is not a luxury or a fashion but a necessity that comes from a very simple fact: we live in a limited world. Contrary to what we have believed for a long time, our human activity is not ... [more ▼]

Recycling is not a luxury or a fashion but a necessity that comes from a very simple fact: we live in a limited world. Contrary to what we have believed for a long time, our human activity is not infinitely expandable but limited in terms of energy, natural resources, space or simply adaptation capacity of nature. From this finding and that awareness must result a behavior that essentially is based on the respect we have for ourselves and therefore for nature (to take car and not to convert). Recycling, reuse, re-use, regeneration or recovery are behaviors that aim to minimize the energy used, to take maximum advantage of the material and to reduce the risk of pollution during the manufacture, use or disposal of these materials. In general, this means that it is desired to delay as much as possible when an object becomes waste. This requires a vision of the life of material or object (Life Cycle Assessment), in which a balance sheet is prepared at every stage of life - from raw material extraction, manufacturing, processing, recycling and elimination. Additionally to materials known as "natural" or “bio-based”, the construction industry increasingly incorporates these alternative materials, even if not without some psychological, normative and technical reservations. As a significant source of pollution (CO2, solid waste, ...), construction is a major reservoir for recovery of waste and industrial by-products: alongside the traditional production process of construction materials and the resurgence of bio-based materials, recycled materials also contribute to the development of materials for future. [less ▲]

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See detailgrteg
Focant, Jean-François ULg

Conference (2016)

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See detailElp3 acetyl-transferase controls neuronal survival in the developing inner ear and is crucial to balance and hearing
Delacroix, Laurence ULg

Conference (2016)

Elp3 lysine acetyl-transferase, the catalytic subunit of the Elongator complex, has been assigned multiple roles in gene transcription, DNA methylation and protein translation efficiency. Given the ... [more ▼]

Elp3 lysine acetyl-transferase, the catalytic subunit of the Elongator complex, has been assigned multiple roles in gene transcription, DNA methylation and protein translation efficiency. Given the importance of acetylation homeostasis in controlling developmental processes together with recent reports implicating Elp3 in cortical neurogenesis, we investigated its role during inner ear formation. In the inner ear, we detected Elp3 transcript in the sensory epithelia of the entire otic vesicle at embryonic day E11.5. At later stages, Elp3 mRNA is strongly expressed in the vestibular and spiral ganglion neurons. To investigate the role of Elp3 in vivo, we used a conditional knock-out mice (Foxg1Cre) in which the expression of the acetyl-transferase is lost in early otocyst. These mice show obvious vestibular defects as indicated by a stereotyped circling ambulation, head bobbing, retropulsion and the absence of a reaching response in the tail-hanging test. Furthermore, we identified a severe hearing loss in Elp3cKO mice through Auditory Brainstem Responses. We show that Elp3 enzyme is crucial for neuronal survival in the spiral ganglion and in the vestibule and that it ensures a correct innervation pattern in the developing inner ear. In the absence of Elp3, a drastic increase in the number of apoptotic neurons was detected by active Caspase-3 and pH2AX immunostainings, particularly during the early stages of development (between E12.5 and E14.5). Postnatally, the neurons remaining in Elp3cKO cochleae seem to establish synaptic contacts with the sensory cells but show obvious signs of cell damage as evidenced by Transmission Electron Microscopy. Taken together, these data support a role for Elp3 in hearing and balance and point out an important role for acetylation homeostasis during inner ear formation. We are currently investigating the molecular mechanisms underlying Elp3 effect on neuronal survival and pathfinding. [less ▲]

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See detailSoft chemistry to design efficient coatings at an industrial scale
Heinrichs, Benoît ULg

Conference (2016)

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See detailEconomic assessment of energy storage for load shifting in Positive Energy Building
Dumont, Olivier ULg; Carmo, carolina; Georges, Emeline ULg et al

Conference (2016)

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See detailWestern lowland gorilla an logging companies A winning duo ?
Haurez, Barbara ULg; Petre, Charles-Albert ULg; Brostaux, Yves ULg et al

Conference (2016)

The critically endangered western lowland gorilla (WLG) disperses the seeds of many fruits. These seeds are often deposited at gorilla nest sites, in open-canopy habitats favorable for seedling growth and ... [more ▼]

The critically endangered western lowland gorilla (WLG) disperses the seeds of many fruits. These seeds are often deposited at gorilla nest sites, in open-canopy habitats favorable for seedling growth and recruitment. However, considering anthropogenic disturbances, such as logging, gorillas and the directed seed dispersal services they provide are at risk. On the other hand, sustainably managed logging concessions are reported to harbor viable gorilla populations. If WLG provide effective dispersal of timber species, it would be of benefit to loggers for these ecological services to be preserved. In order to explore such interactions between the WLG and the timber industry, we (1) assessed the status of a WLG population in a logging concession, and (2) investigated their seed dispersal effectiveness for timber species. We inferred the long-term viability of a gorilla population in a Gabonese logged forest, and the short-term impact of timber harvesting on this population. Gorilla density was estimated through three successive censuses: (1) 25 years after the first felling cycle, (2) six months and (3) one year after the second felling cycle. Seed dispersal effectiveness for timber species was estimated through gorilla fecal analysis and germination trials in a nursery. The results suggested that a viable population of WLG could be maintained in selectively logged forests (< 2 cut trees ha-1). Indeed, although gorillas tend to flee areas being actively exploited for timber, their densities in logged forests can regain their initial levels, or even a higher one, within one year post-logging. Over a period of 20 months, the seeds of 59 plant species were found in gorilla feces. Nearly 20 % of the identified species (N=35) are of economic value because of their exploitation for timber. Analyzed fecal units contained on average 81.0 ± 107.8 intact seeds (0-566). Specific germination success varied from 0 to 100 %, with an average of 46 ± 36 %. Sustainably-managed logging concessions may host viable populations of WLG. Considering the seed dispersal services provided for timber species and the unique directed-dispersal to open-canopy habitats, gorillas are implicated in the regeneration and maintenance of logged forests. Therefore, the generalization of sustainable logging would be beneficial both to the economical and the environmental value of tropical forests, thus providing an incentive for loggers and governments to prevent illegal hunting in concessions. [less ▲]

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See detailCharacterization of photoactive coatings of SiO2 nanoparticles and Rose Bengal onto glass surfaces
Mendoza Gallego, Carlos ULg; Lismont, Marjorie ULg; Pàez Martinez, Carlos ULg et al

Conference (2016)

The fluorescence emission and singlet oxygen (1O2) production have been widely investigated over the last decade due to high-value added applications such as organic chemical synthesis1, wastewater ... [more ▼]

The fluorescence emission and singlet oxygen (1O2) production have been widely investigated over the last decade due to high-value added applications such as organic chemical synthesis1, wastewater treatment2 or photodynamic cancer therapy3. This work is dedicated to the synthesis and deposition of SiO2 nanoparticles on glass surfaces using Stober’s process and dip coating, respectively. The adherence was improved through the incorporation of different concentrations of these nanoparticles into a TiO2 matrix. Additionally, the speed of dip coating was used to modify SiO2 thicknesses. Rose bengal was covalently anchored to SiO2 coatings through (3-aminopropyl)triethoxysilane (APTES) linker. UV, IR, fluorescence, SEM and profilometry were used to characterize the corresponding films and the efficiency for singlet oxygen production was measured by oxidation of the amino acid methionine. The immobilization of SiO2 nanoparticles photosensitized with rose bengal showed promising results for the production of singlet oxygen. [less ▲]

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See detailProduction of biofuels from Brazil’s sugarcane bagasse via thermochemical pathway. A review
Nicodème, Thibault ULg; Jacquet, Nicolas ULg; Richel, Aurore ULg

Conference (2016)

Document décrivant la production de biocarburants à partir de la bagasse de canne à sucre par la voie thermochimique. Des techniques telles que la gazéification, le procédé Fischer-Tropsch ou la pyrolyse ... [more ▼]

Document décrivant la production de biocarburants à partir de la bagasse de canne à sucre par la voie thermochimique. Des techniques telles que la gazéification, le procédé Fischer-Tropsch ou la pyrolyse sont décrites. [less ▲]

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See detailAdsorption of terpenes compounds onto palygorskite
GHRAB, Sana; LOUSAIEF, Mabrouk; Cretin, Marc et al

Conference (2016)

The present work aimed to study the processes of the synthesis insecticidal formulation. The active compounds of essential oil of eucalyptus globulus were fixed in the palygorskite by adsorption process ... [more ▼]

The present work aimed to study the processes of the synthesis insecticidal formulation. The active compounds of essential oil of eucalyptus globulus were fixed in the palygorskite by adsorption process. Two samples types of palygorskites were used; raw and modified palygorskite. The palygorskite clays were characterized by several physicochemical techniques including X-Ray Diffraction (XRD) and Fourier Transformed Infra Red (FTIR) analyses. Results show that the raw clay has a fibrous structure with calcite impurities. These structures and physicochemical properties of palygorskite raw and organo-clays give it the potential of material adsorbent. Results show that the adsorption capacity strongly depends on affinity between terpenic compounds and organic cations rather than on interlayer distance of organo-palygorskite clays. The highest adsorption capacity of terpenic compounds is obtained with palygorskite modified by DDDMA. These results revealed the potential utility of the S1-DDDMA as adsorbents for the uptake of terpenic compounds in environmental applications. [less ▲]

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See detailL’appartenance à une clique ou à une dyade peut-elle protéger l’estime de soi des adolescents qui éprouvent des difficultés scolaires ?
Gaudet, Olivier; Vaillancourt, Marie-Claire; Véronneau, Marie-Hélène et al

Conference (2016)

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See detailLes ONG de développement belge: l'évolution de leur professionnalisation au prisme des contraintes normative.
Contor, Justine ULg

Conference (2016)

Il s'agit d'un article présenté dans le cadre d'une journée d'étude en sociologie des groupes professionnels. Cet article aborde l'évolution de la professionnalisation du secteur des ONG belges de ... [more ▼]

Il s'agit d'un article présenté dans le cadre d'une journée d'étude en sociologie des groupes professionnels. Cet article aborde l'évolution de la professionnalisation du secteur des ONG belges de développement. [less ▲]

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See detailBacterial Fe III reduction enhances the dissociation of Fe oxyhydroxides - OM associations in podzolic Bhs soil horizons
Vermeire, Marie-Liesse; Bonneville, Steeve; Stenuit, Benoit et al

Conference (2016)

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See detailTree light capture and spatial variability of understory light increase with species mixing and tree size heterogeneity
Ligot, Gauthier ULg; Ameztegui, Aitor; Courbaud, Benoît et al

Conference (2016)

Structurally heterogeneous forest ecosystems are generally considered to be more productive, resistant and resilient to future changes than simplified ones. The quantity of solar radiation available to ... [more ▼]

Structurally heterogeneous forest ecosystems are generally considered to be more productive, resistant and resilient to future changes than simplified ones. The quantity of solar radiation available to trees and the vegetation layer has been suggested to be a central driver among the possible mechanisms proposed to explain a greater productivity of heterogeneous stands. The idea that trees of different species and sizes can occupy complementary positions in space has led to the hypothesis that interception of radiation could increase in mixed and multi-layered forest stands, which should thus lead to an increase in production. In addition, the long-term sustainability of structurally heterogeneous forests with multiple coexisting species can only be ensured if the variability in light availability in the understory is sufficient for all species to be able to survive, grow and reproduce. However, better occupancy of canopy space should lead to reduced variability in understory light conditions. In this study, we investigate whether increasing overstory heterogeneity results in greater light capture by trees and greater variability in understory light. Greater light capture has been suggested as a possible explanation for the overyielding of complex stands and the greater variability in understory light as a mechanism for continuous recruitment of juvenile trees of various species. Based on allometric relationships developed in previous studies, we modeled the three-dimensional structure of forest stands (50 x 50 m) with 3 typical forest structures (single-layered, multi-layered and reverse j-shaped), 10 forest compositions combining beech, oak, fir and pine, 3 levels of basal area, and a fixed mean tree diameter (Figure 1). We predicted understory light conditions using the forest light interception model SAMSARALIGHT. The importance of each factor on understory light availability and variability was analyzed with three-way analyses of covariance. We found no evidence that increasing compositional or structural heterogeneity reduces understory light transmittance or increases tree light capture. Understory light transmittance in mixed stands was always intermediate between that is corresponding pure stands of the species involved in the mixture. Moreover, light transmittance slightly increased with increasing heterogeneity in forest structure. Stands composed of a single homogeneous tree layer transmitted less light than stands with two or more tree layers or stands composed of two or more species. Stand composition had the strongest influence on understory light in our simulations. Stand density was the second most important factor while heterogeneity in tree size had little effect. Compositional heterogeneity increased the variability in understory light conditions in some cases such as in fir-pine mixtures but adding beech to mixtures with oak generally limited variability in understory light, except in stands with very low basal area. Size inequality therefore increased understory light variability little and mainly in pure stands. The advantage of heterogeneous forest stands seems to lie in opportunities for the natural regeneration of various species to benefit from a diversity of light conditions in the understory rather than in opportunities to enhance light capture by the overstory although this effect depends on tree species composition. [less ▲]

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See detailEvolution de la fiscalité immobilière en Région wallonne
Bourgeois, Marc ULg

Conference (2016)

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See detailDOES A TWO-DAY POSTGRADUATE COURSE ON THE MANAGEMENT OF CHRONIC MUSCULO-SKELETAL PAIN INCREASES THE PHYSIOTHERAPISTS’ PAIN NEUROPHYSIOLOGY KNOWLEDGE?
Pitance, Laurent; Brasseur, Pauline; Rondeaux, Charlie et al

Conference (2016)

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See detailHydrodynamic instabilities in shallow reservoirs: implications for sediment management
Peltier, Yann; de Cuyper, Anaïs; Erpicum, Sébastien ULg et al

Conference (2016)

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See detailA herpesvirus alters the behavior of its host to enhance its replication
Ronsmans, Maygane ULg

Conference (2015, December 18)

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See detailLa terre creuse, de la géologie à la fiction. Postérité d’un chronotope d’anticipation à partir de Jules Verne
Stienon, Valérie ULg

Conference (2015, December 18)

Le voyage au centre de la Terre a été magistralement imaginé par Jules Verne en 1864 avant de devenir un véritable topos de la littérature populaire et de jeunesse. Sa postérité s’illustre dans les ... [more ▼]

Le voyage au centre de la Terre a été magistralement imaginé par Jules Verne en 1864 avant de devenir un véritable topos de la littérature populaire et de jeunesse. Sa postérité s’illustre dans les multiples déclinaisons de la terre creuse, recensées notamment par Guy Costes et Joseph Altairac dans leur bibliographie commentée en 2006. En quoi ce motif plus communément associé à une atemporalité (monde perdu, histoire secrète) ou à une régression temporelle (monde sauvage, vie des cavernes) intervient-il aussi dans une écriture de l’anticipation ? Chez Verne lui-même, il s’agit à la fois d’un voyage à rebours dans le temps, chaque strate parcourue correspondant à un recul historique, et d’une expédition scientifique déployant une technologie et des connaissances novatrices. Ce motif topique semble donc porteur d’une ambiguïté temporelle féconde. La communication proposera un parcours transversal dans le corpus d’anticipation francophone allant d’Ignis (1883) de Didier de Chousy qui traite de l’exploitation d’une nouvelle énergie géothermique, le « feu central de la Terre », jusqu’à Régis Messac dont La Cité des Asphyxiés (1937) dépeint un monde intra-terrestre dystopique. Les reprises de la terre creuse permettent d’éclairer l’importance des filiations génériques, des supports partagés et des formules éditoriales à succès, mais elles mettent aussi en évidence des œuvres atypiques, traduisant de manière spécifique le discours social et scientifique de leur époque. Si Verne, ses épigones et d’autres auteurs d’anticipation ont pu être tentés de réinvestir la terre creuse en fiction à un moment où sa réalité n’est plus perçue comme crédible dans le champ scientifique, c’est sans doute en raison de l’intrication particulièrement dense des disciplines concernées (géographie, géologie, paléontologie, sciences naturelles) et de l’importance des idéologies qui ont pu les croiser et les dynamiser : positivisme, hygiénisme, colonialisme, craintes écologiques. Cette communication voudrait montrer comment le motif fécond de la terre creuse, dans son évolution complexe du plausible à l’irréel, passe d’une croyance à une théorie scientifique avant de se développer en chronotope littéraire. [less ▲]

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See detailCompte rendu - 28th Australian Conference in Banking and Finance
Lambert, Marie ULg; Fays, Boris ULg; Hübner, Georges ULg

Conference (2015, December 18)

Fama and French risk premiums do not reliably estimate the magnitude of the size or book-to-market effects, inducing many researchers to inflate the number of factors. We object that controlling ex ante ... [more ▼]

Fama and French risk premiums do not reliably estimate the magnitude of the size or book-to-market effects, inducing many researchers to inflate the number of factors. We object that controlling ex ante for noise in the estimation procedure enables to keep a parsimonious set of factors. We replace Fama and French’s independent rankings with the conditional ones introduced by Lambert and Hübner (2013). This alternative framework generates much stronger “turn-of-the-year” size and “through-the-year” book-to-market effects than conventionally documented. Furthermore, the factors deliver less specification errors when used to price portfolios, especially regarding the “small angels” (low size – high BTM stocks). [less ▲]

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See detailStudying ‘décret mémoire’ of the French Community of Belgium.
Nossent, Jérôme ULg

Conference (2015, December 18)

On the 13th March 2009, Belgium’s French Community (currently named the Wallonia-Brussels Federation (WBF)) parliament, adopted the “décret mémoire” (decree of remembrance). This deed shows Belgian public ... [more ▼]

On the 13th March 2009, Belgium’s French Community (currently named the Wallonia-Brussels Federation (WBF)) parliament, adopted the “décret mémoire” (decree of remembrance). This deed shows Belgian public authorities’ will to mark their presence in the memorial field. The decree organizes the recognition and the financing of multiple actors and institutions by the authorities, through a structure and a hitherto unseen way of functioning. Among its activities, the decree organizes yearly calls for projects, whose recipients are non-profit-making organizations and educational institutions that are either organized or subsidised by the WBF. The organisation set in place by the decree of remembrance appears to be a “political use of the past”. That means that some past events are chosen and promoted to give meaning to the individual memory, in a collective intent. This way of doing comes from the political will to organize the representation of one common past, aiming to bring out themes that carry particular values. Consequently, is it possible to study the power that the decree actually gives to the public authorities? Does it allow them to constrain or to influence other actors of their memory field? If that is the case, how could it be possible to demonstrate it? We suggest trying to find an answer to these interrogations through a case study concerning the 2014 calls for projects of the year. [less ▲]

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See detailAssessing the Risk of Ecosystem Disruption in Europe using a Dynamic Vegetation Model driven by CMIP5 Regional Climatic Projections from EURO-CORDEX
Dury, Marie ULg; Hambuckers, Alain ULg; Henrot, Alexandra-Jane ULg et al

Conference (2015, December 18)

While the combination of warmer and drier mean climatic conditions can have severe impacts on ecosystems, extreme events like droughts or heat waves that break the gradual climate change can have more ... [more ▼]

While the combination of warmer and drier mean climatic conditions can have severe impacts on ecosystems, extreme events like droughts or heat waves that break the gradual climate change can have more long-term consequences on ecosystem composition, functioning and carbon storage. Hence, it is essential to assess the changes in climatic variability and the changes in frequency of extreme events projected for the future. Ecosystems could not be in a condition to adapt to these new conditions and might be disrupted. Here, the process-based dynamic vegetation model CARAIB DVM was used to evaluate and analyze how future climate and extreme events will affect European ecosystems. To quantify the uncertainties in the climatic projections and in their potential impacts on ecosystems, the vegetation model was driven with the outputs of different regional climatic models (RCMs), nested in CMIP5 GCM projections for the EURO-CORDEX project. We used the ALADIN version 5.3 (Météo-France/CNRM) and other EURO-CORDEX RCMs. These climatic projections are at a high spatial resolution (0.11-degree, ~12 km). CARAIB simulations were performed across Europe over the historical period 1951-2005 and the future period 2006-2100 under RCP4.5 and RCP8.5 emission scenarios. We simulated a set of 99 individual species (47 herbs, 12 shrubs and 40 trees) representing the major European ecosystem flora. First, we analyzed the climatic variability simulated by the climatic models over the historical period and compared it with the observed climatic variability. None of these climatic models can reproduce accurately the present natural climatic variability. Then, to assess the risk of ecosystem disruption in the future and to identify the vulnerable areas in Europe, we created an index combining several CARAIB outputs: runoff, mean NPP, soil turnover, burned area, appearance and disappearance of species. We evaluated the severity of change projected for these variables (period 2071-2100) relative to their current variability (period 1961-1990). Mean changes were considered severe if they exceed observed variability. The highest values of the index were found in southern Europe, indicating that the amplitude of the expected ecosystem changes largely exceeds current interannual variability in this area. [less ▲]

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See detailNovel organocobalt based on acetylacetonate ligands for the precision synthesis of telechelic polymers
Demarteau, Jérémy ULg; Cordella, Daniela ULg; Kermagoret, Anthony et al

Conference (2015, December 17)

Organocobalt(III) with acetylacetonate ligands is the most representative example of R-Co bearing a weak C-Co bond that can release alkyl radicals under mild experimental conditions without requiring a ... [more ▼]

Organocobalt(III) with acetylacetonate ligands is the most representative example of R-Co bearing a weak C-Co bond that can release alkyl radicals under mild experimental conditions without requiring a photoactivation. The unique isolated specimen is a short oligo(vinyl acetate) end-capped by Co(acac)2. The high lability of the C-Co bond of this R-Co combined to the unique capacity of Co(acac)2 to reversibly trap alkyl radicals make this organocobalt unique for the precision synthesis of unprecedented polymers by the so-called Cobalt-Mediated Radical Polymerization (CMRP) technique. The growth of unstabilized and highly reactive growing radicals formed by the addition of R· to unconjugated olefins (vinyl esters, vinyl amides, vinyl imidazolium, vinyl chloride, ethylene) is controlled by the reversible formation of a weak C-Co bond at the polymer chain end. The lack of alternatives to this R-Co, especially to the structure of the alkyl group, has placed limitations on further innovation in (macro)molecular design. Other functional variants that would enable attractive chain-end derivatizations are unfortunately not available. In this communication, we will address this important challenge by describing an innovative synthetic route towards the preparation of a new functional R-Co(acac)2 that are characterized by a weak C-Co bond. We will report the conditions required for initiating and controlling the radical polymerization of various monomers from these R-Co. We will also demonstrate their utility for the production of novel telechelic polymers under mild experimental conditions, syntheses that can be carried out in water. [less ▲]

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See detailSur la dialectique, Derrida
Caeymaex, Florence ULg

Conference (2015, December 17)

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See detailPhotologie et politique
Petteni, Oriane ULg

Conference (2015, December 17)

The aim of this presentation was to underline the so far underestimated importance of the light and it's rectilinear movement in Derrida's deconstruction project, in dialogue with Hegels'Philosophy of ... [more ▼]

The aim of this presentation was to underline the so far underestimated importance of the light and it's rectilinear movement in Derrida's deconstruction project, in dialogue with Hegels'Philosophy of Nature. The challenge was to bound together the motiv of light, heat, sounds, thermodynamic and voice that are very present in Derrida's work and to show how they offer a rich frame that had inspired both post-colonial and feminist studies. [less ▲]

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See detailLe mythe de la donation de sens. Motivation de la noèse par le donné
Leclercq, Bruno ULg

Conference (2015, December 17)

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See detailSmart point cloud: Toward an intelligent documentation of our world
Poux, Florent ULg; Billen, Roland ULg

Conference (2015, December 17)

A point cloud is the output data of many sensors, such as Lidar and laser scanners, or the processing output from photogrammetry and SFM reconstructions. It is a 3D spatial representation of the ... [more ▼]

A point cloud is the output data of many sensors, such as Lidar and laser scanners, or the processing output from photogrammetry and SFM reconstructions. It is a 3D spatial representation of the environment through thousands, million or billions of points, where each single point as a position in space (X, Y, Z) It is safe to say that today, the technology is ready, and enable us to digitize very quickly the world as it stands. This RAW data is rapidly growing with the autonomous vehicles mapping our roads (LiDAR system equip it) and the robotics field using sensors to evolve in the environment. But how do we use this data? Professionnals have been struggling with point cloud, or delivering it to a client because it looks nice, but is there a real added value to visualization only? Can our clients use it at its full potential? [less ▲]

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See detailUnderwater silence world: the end of the dogma
Parmentier, Eric ULg

Conference (2015, December 17)

Passive acoustics can offer inexpensive, non-invasive and no-destructive means of assessing temporal and spatial patterns in the distribution of individuals engaging in calling. In marine environments ... [more ▼]

Passive acoustics can offer inexpensive, non-invasive and no-destructive means of assessing temporal and spatial patterns in the distribution of individuals engaging in calling. In marine environments, passive acoustic recording methods can be used at depths not accessible to humans, independent of weather conditions, and for a long term. However, these studies have often restricted their investigations to the monitoring of one or two aquatic species. One reason of this loss of information is quite easy to explain: most of the sounds can be detected but cannot be identified. In many families, calling abilities are described in one or two species only although the descriptions of sound producing mechanisms have highlighted other members should be able to make sounds. Since 50 years, sounds were for example described in more or less 40 pomacentrid species but all the 392 species should be able to make sounds. This situation can be more complicated since some species are able to make different kinds of sounds according to the behavioural context. Some call characteristics can also be modulated according to the size in some species only. It shows an important amount of work has to be done to be able to understand the reef soundscape and to develop call recognition software system. [less ▲]

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See detailOrganometallic-mediated radical polymerization, a versatile tool for the precision synthesis of unprecedented copolymers
Detrembleur, Christophe ULg; Cordella, Daniela ULg; Demarteau, Jérémy ULg et al

Conference (2015, December 17)

Controlled radical polymerization techniques give access to innovative (multi)functional polymeric materials for advanced applications. Organometallic-mediated radical polymerization (OMRP) is one of ... [more ▼]

Controlled radical polymerization techniques give access to innovative (multi)functional polymeric materials for advanced applications. Organometallic-mediated radical polymerization (OMRP) is one of these techniques that enable the preparation of unprecedented copolymers, and is based on the temporary deactivation of the propagating chains by a transition metal complex. The strength of the carbon-metal bond at the polymer chain-end is dictating the reactivity of the system. One of the most efficient OMRP process involves the commercially available Co(acac)2. Recent studies have demonstrated that the system reactivity is easily modulated by the addition of some molecules able to coordinate the cobalt complex, by tuning the temperature, or by UV irradiation. The facile modulation of the C-Co bond strength has enabled to control the polymerization of monomers of opposite reactivity, such as vinyl esters and acrylates, and to synthesize novel well-defined (co)polymers under very mild experimental conditions. In this talk, we will discuss some recent breakthroughs in the field that illustrate the huge potential of the process for the design of unique functional macromolecules. More precisely, we will describe the first control of the copolymerization of ethylene with a series of functional vinyl monomers under mild experimental conditions that leads to random copolymers with ethylene content up to 60 mol% and negligible chain branching. The first one-pot synthesis of novel ethylene-based block copolymers will also be discussed. Additionally, we will demonstrate the implementation of the OMRP process to aqueous based media by describing, amongst other examples, the precision synthesis of innovative functional (telechelic) poly(ionic liquid)s (PILs) in water. [less ▲]

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See detailHistoire et actualité de l'"irrédentisme" français en Belgique francophone
Lanneau, Catherine ULg

Conference (2015, December 16)

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See detailContrôle bactériologique de l’environnement : Apport du MALDI Biotyper
MEEX, Cécile ULg

Conference (2015, December 16)

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See detailThe beginnings of workers’ compensation schemes. Crossing perspectives of the litigation (about workplace accidents) in France and Belgium
Geerkens, Eric ULg; Bruno, Anne-Sophie

Conference (2015, December 15)

Les législations française et belge sur les accidents du travail constituent des ruptures déjà largement explorées, principalement sur le versant de leur laborieuse genèse. Les recherches sont bien moins ... [more ▼]

Les législations française et belge sur les accidents du travail constituent des ruptures déjà largement explorées, principalement sur le versant de leur laborieuse genèse. Les recherches sont bien moins développées à propos de leur mise en œuvre concrète. Comment les différents acteurs chargés de leur application – juges civils/de paix, médecins, avocats, assureurs, syndicats – autant que les victimes ont-ils expérimenté ce nouveau cadre légal ? Par un retour prioritaire aux sources judiciaires, cette contribution entend explorer ce processus d’apprentissage en mettant l’accent sur les principales difficultés rencontrées, sur les enjeux nouveaux et sur les réponses apportées au cours des années d’entrée en vigueur de la loi. À titre comparatif, les mêmes types de sources seront examinées pour une période tenue pour plus routinière (c. 1928-1930), de manière à mettre en évidence certaines des solutions retenues après la phase d’apprentissage, tout en soulignant, le cas échéant, les problèmes pendants ou nouveaux. [less ▲]

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See detailInternet and Cyber Party Membership: the Case of the Belgian Pirate Party
Macq, Hadrien ULg; Jacquet, Vincent

Conference (2015, December 15)

Since a few years, it has become possible to observe the development of cyber parties in western democracies. Their intensive use of internet to coordinate relations between members is supposed to attract ... [more ▼]

Since a few years, it has become possible to observe the development of cyber parties in western democracies. Their intensive use of internet to coordinate relations between members is supposed to attract new types of militant, interested by less hierarchical informal networks and sporadic political activities. Yet, the following question remains: What role(s) does the Internet play in the enrolment process within this kind of parties? Analyzing fifteen in-depth interviews with Belgian Pirate Party’s members as well as members’ online activities, this paper shows that it is possible to distinguish two kinds of cyber parties’ members. On the one side, some members are passionate about information and communications technology and their party membership is their sole political activity. On the other side, some members are more distant users of the Internet and are active in plenty of postmodern political associations. These two divergent militant profiles are key elements to explain the divergence of views among Belgian Pirate Party’s members, but also the relative lack of political visibility of this political party due to difficulties in achieving coordination. [less ▲]

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See detailCartographie des potentialités agricoles et forestières de la région Maradi
Karimou Barké, Mahamadou Salifou ULg; Ambouta, K. JM; Tydjani, A. D

Conference (2015, December 15)

Située au centre Sud du Niger, la région de Maradi est une zone semi-aride à deux saisons : une saison de pluies (3 à 4 mois) et une saison sèche (8 à 9 mois). Les principales activités, l’agriculture et ... [more ▼]

Située au centre Sud du Niger, la région de Maradi est une zone semi-aride à deux saisons : une saison de pluies (3 à 4 mois) et une saison sèche (8 à 9 mois). Les principales activités, l’agriculture et l’élevage, sont pratiquées dans trois zones distinctes : la zone pastorale proprement dite au Nord où l’élevage extensif est pratiqué, la zone intermédiaire à vocation agropastorale au niveau de laquelle l’élevage est semi-extensif et la zone agricole au Sud, où l’élevage est semi-intensif. Ces différentes zones regorgent d’importantes potentialités agricoles qui font vivre plus 90% de la population. Cependant, les populations méconnaissent le potentiel agricole (valorisable) de la région et son extension. La présente étude vise à identifier les différents types de sols, les zones climatiques, les classes d’occupation des sols et les aires protégées de la région de Maradi. L’étude a d’abord synthétisé plusieurs bases de données géographiques (AGRHYMET, FAO, IGN) sur les ressources naturelles. Ensuite une image Aster de 15m de résolution a été utilisée pour déterminer les zones irrigables de la région. Les résultats identifient six classes de sols : les lithosols (1 921 ha), les régosols (96 386 ha), les sols bruns rouge (654 399 ha), les sols ferrugineux tropicaux lessivés (2 569 923 ha), les sols ferrugineux tropicaux peu lessivés (185 277 ha) et les sols hydromorphes (387 711 ha). Les sols irrigables, constitués par les sols de la vallée de Tarka, du Goulbi N’Kaba et du Goulbi Maradi, représentent 12 % de la superficie totale de la région. L’analyse de l’occupation du sol de la région de Maradi a permis confirmer que les zones irrigables de la région Maradi ont des sols hydromorphes. L’étude a permis de délimiter les aires protégées de la région repartie en forêt classée, en forêt protégée, en réserve de faune et gommerais. Cette étude donne des informations sur la localisation et l’extension des potentialités agricoles et forestières de la région de Maradi. Ces informations peuvent être utilisées pour réaliser un plan d’aménagement et de gestion de chaque zone présentant un potentiel agricole. [less ▲]

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See detailArthrose rachidienne lombaire: une réalité? comment la définir?
Henrotin, Yves ULg

Conference (2015, December 15)

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See detailElectric charging of bodies and electrostatic discharges: Basic notions
Vanderbemden, Philippe ULg

Conference (2015, December 15)

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See detailUnderground Pumped Storage Hydroelectricity using abandoned works (open pits and deep mines)
Pujades, Estanislao ULg; Willems, Thibault ULg; Bodeux, Sarah ULg et al

Conference (2015, December 15)

Pumped Storage Hydroelectricity (PSH) is a good alternative to increase the efficiency of power plants, which cannot regulate the amount of electricity generated according to the demand (wind, solar or ... [more ▼]

Pumped Storage Hydroelectricity (PSH) is a good alternative to increase the efficiency of power plants, which cannot regulate the amount of electricity generated according to the demand (wind, solar or even nuclear power plants). PSH plants, which consist in two reservoirs located at different heights (upper and lower), can store energy during low demand periods (pumping water from the lower to the upper reservoir) and generate electricity during the high demand peaks (falling water from the upper to the lower reservoir). Given that the two reservoirs must be located at different heights, PSH plants cannot be constructed in flat regions. Nevertheless, in these regions, an alternative could be to use abandoned underground works (open pits or deep mines) as lower reservoirs to construct Underground Pumped Storage Hydroelectricity (UPSH) plants. To select the best place to construct a plant, two considerations must be taken into account regarding the interaction between UPSH plants and groundwater: 1) the alteration of the natural conditions of aquifers and 2), the efficiency of the plant since the electricity generated depends on the hydraulic head inside the underground reservoir. Obviously, a detailed numerical model must be necessary before to select a location. However, a screening methodology to reject the most disadvantageous sites in a short period of time would be useful. Groundwater flow impacts caused by UPSH plants are analyzed numerically and the main variables involved in the groundwater evolution are identified. The most noticeable effect consists in an oscillation of the groundwater. The hydraulic head around which groundwater oscillates, the magnitude of the oscillations and the time to achieve a “dynamic steady state” depend on the boundaries, the parameters of the aquifer and the characteristics of the underground reservoir. A screening methodology is proposed to assess the main impacts caused in aquifers by UPSH plants. Finally, the efficiency regarding the groundwater evolution inside the reservoir is determined. [less ▲]

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See detailSpatial autocorrelation: robustness of measures and tests
Ernst, Marie ULg; Haesbroeck, Gentiane ULg

Conference (2015, December 14)

Distinguishing the analysis of spatial data from classical analysis is only meaningful if the spatial components bring information. Therefore, testing if the spatial autocorrelation is significant may ... [more ▼]

Distinguishing the analysis of spatial data from classical analysis is only meaningful if the spatial components bring information. Therefore, testing if the spatial autocorrelation is significant may confirm or deny the need to consider spatial analysis over the classical one. Spatial autocorrelation expresses the dependence between values at neighbouring locations. Several measures of spatial autocorrelation are defined in the literature. Moran’s index, Geary’s ratio and Getis-Ord statistic are the most used statistics. Tests based on these measures have been developed in the literature using asymptotic and permutation results. They are used in practice in many fields, for instance in geography, economics, biogeosciences, medicine, ... However, these tests should be cautiously applied because they are not robust. A single contaminated observation can significantly modify their results. The talk has two main objectives. Firstly, the already available tools for measuring spatial autocorrelation will be reviewed with an emphasis on the study and comparison of their robustness. Secondly, alternative methods will be proposed to robustly estimate the spatial autocorrelation. [less ▲]

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See detailAnalysing the response of European ecosystems to droughts and heat waves within ISI-MIP2 simulations
Henrot, Alexandra-Jane ULg; Dury, Marie ULg; François, Louis ULg et al

Conference (2015, December 14)

With unprecedented speed and extent, the future climate change can be expected to severely impact terrestrial ecosystems due to more frequent extreme events, such as droughts or heat waves. What will be ... [more ▼]

With unprecedented speed and extent, the future climate change can be expected to severely impact terrestrial ecosystems due to more frequent extreme events, such as droughts or heat waves. What will be the impacts of these extreme events on ecosystem functioning and structure? How far will net primary production be reduced by such events? What will be the impact on plant mortality? Could such events trigger changes in the abundance of plant species, thus leading to biome shifts? In this contribution, we propose to use ISI-MIP2 model historical simulations from the biome sector to analyse the response of ecosystems to droughts or heat waves, trying to understand the differences between several vegetation models (e.g. CARAIB, HYBRID, LPJ). The analysis will focus on Europe. It will compare and assess the model responses for a series of well-marked drought or heat wave events in the simulated historical period, such as those that occurred in 1976, 2003 or 2010. This analysis will be performed in terms of several important environmental variables, like soil water and hydric stress, runoff, PFT abundance, net primary productivity and biomass, fire frequency, turnover of soil organic matter, etc. Whenever possible, the response of the model will be compared to available data for the most recent well-marked events. Examples of data to be used are eddy covariance, satellite data (including leaf area and fire occurrence) or tree rings. [less ▲]

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See detailCan the maximum power principle predict effective conductivities of a confined aquifer? A lab experiment
Westhoff, Martijn ULg; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

Conference (2015, December 14)

Power can be performed by a system driven by a potential difference. From a given potential difference, the power that can be subtracted is constraint by the Carnot limit, which follows from the first and ... [more ▼]

Power can be performed by a system driven by a potential difference. From a given potential difference, the power that can be subtracted is constraint by the Carnot limit, which follows from the first and second laws of thermodynamics. If the system is such that the flux producing power (with power being the flux times its driving potential difference) also influences the potential difference, a maximum in power can be obtained as a result of the trade-off between the flux and the potential difference. This is referred to as the maximum power principle. It has already been shown that the atmosphere operates close to this maximum power limit when it comes to heat transport from the Equator to the poles, or vertically, from the surface to the atmospheric boundary layer. To reach this state of maximum power, the effective thermal conductivity of the atmosphere is adapted by the creation of convection cells. The aim of this study is to test if the soil’s effective hydraulic conductivity also adapts in such a way that it produces maximum power. However, the soil’s hydraulic conductivity adapts differently; for example by the creation of preferential flow paths. Here, this process is simulated in a lab experiment, which focuses on preferential flow paths created by piping. In the lab, we created a hydrological analogue to the atmospheric model dealing with heat transport between Equator and poles, with the aim to test if the effective hydraulic conductivity of the sand bed can be predicted with the maximum power principle. The experimental setup consists of two freely draining reservoir connected with each other by a confined aquifer. By adding water to only one reservoir, a potential difference will build up until a steady state is reached. The results will indicate whether the maximum power principle does apply for groundwater flow and how it should be applied. Because of the different way of adaptation of flow conductivity, the results differ from that of the atmosphere. [less ▲]

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See detailWhy is it necessary to change the physical activity representations in women?
Cloes, Marc ULg

Conference (2015, December 14)

Various (inter)national organizations and institutions expend a great deal of effort on fighting against the dramatic grow of the sedentariness of the modern society. In consumer magazines as well as in ... [more ▼]

Various (inter)national organizations and institutions expend a great deal of effort on fighting against the dramatic grow of the sedentariness of the modern society. In consumer magazines as well as in prestigious scientific journals, number of publications emphasize the interest that each of us can withdraw from a regular active lifestyle. So, nowadays, in the Western countries, everyone is supposed to know that physical activity is one of the ingredients of a healthy lifestyle. Nevertheless, it is clear that the population seems to paradoxically misunderstand the concept of physical activity. Moreover, in terms of sedentariness, the female audience is considered as particularly at risk and requires specific attention. According to the socioecological models, physical activity behaviors are influenced by a large array of variables belonging to the person itself as well as for its social, built, natural environments, and policies. In parallel, the transtheoretical model of health behavior change emphasizes that a person who changes his/her behavior goes through five stages (precontemplation, contemplation, preparation, action, and maintenance). Following that theory, the starting point of the change process consists of the awareness of the individual about the behavior. This stage refers to the individual factors linked to psychological, cognitive and emotional aspects (knowledge about PA, expected benefits, motivation, perceived pleasure …) that can be related to the people’s representations about PA. A representation can be defined as a mental phenomenon that corresponds to a more or less conscientious, organized and consistent set of cognitive and affective elements concerning one particular object. The goal of this paper is to underline the interest of the analysis of the representations about PA in a way to understand the reasons of reluctance, motivation and/or blockages demonstrated by individuals - and by women in particular - in their changing process. Study on such topic could become a key aspect in the search for useful tools in the habits transformation. In fact, despite representations’ central role, very few studies focusing on this variable have been published in the literature. This is especially surprising as it was demonstrated that representations about PA have a bigger influence on the lifestyle modification than concrete environmental variables do. When considering representations about PA, we consider five elements: definition, believes about the impacts, knowledge of the recommendations, self-evaluation, and identification of the change strategies). These questions will be the focus of the paper. Data will support and illustrate their legitimacy in the physical activity promotion. [less ▲]

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See detailMultivariate coefficients of variation: a full inference toolbox
Aerts, Stéphanie ULg; Haesbroeck, Gentiane ULg

Conference (2015, December 13)

The univariate coefficient of variation (CV) is a widely used measure to compare the relative dispersion of a variable in several populations. When the comparison is based on $p$ characteristics however ... [more ▼]

The univariate coefficient of variation (CV) is a widely used measure to compare the relative dispersion of a variable in several populations. When the comparison is based on $p$ characteristics however, side-by-side comparison of marginal CV's may lead to contradictions. Several multivariate coefficients of variation (MCV) have been introduced and used in the literature but, so far, their properties have not been much studied. Based on one of them, i.e. the inverse of the Mahalanobis distance between the mean and the origin, this talk intends to demonstrate the usefulness of MCV's in several domains (finance and analytical chemistry) as well as provide a complete inference toolbox for practitioners. Some exact and approximate confidence intervals are constructed, whose performance is analyzed through simulations. Several bias-correction methods, either parametric or not, are suggested and compared. Finally, since MCV's are used for comparison purposes, some test statistics are proposed for the homogeneity of MCV's in $K$ populations. Throughout the talk, the robustness of the techniques will be discussed. As a by-product, a test statistic allowing to reliably compare $K$ univariate CV's even in presence of outliers will be outlined. [less ▲]

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See detailSyndrome metabolique: prise en charge par le kinésithérapeute
Henrotin, Yves ULg

Conference (2015, December 13)

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See detailChanging the representations for an active lifestyle in women
Cloes, Marc ULg

Conference (2015, December 13)

Representations are a key factor in the development of a physically active lifestyle. In women, it is fundamental to verify if there are not wrong represnetations about physical activity because that ... [more ▼]

Representations are a key factor in the development of a physically active lifestyle. In women, it is fundamental to verify if there are not wrong represnetations about physical activity because that could be an important barrier to any change. This workshop will propose several activities aiming to show how it is possible to increase the awareness of people about what is physical activity and how to accept to reach the international recommendations. [less ▲]

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See detailNonparametric estimation and bootstrap inference on recent trends in atmospheric ethane
Friedrich, Marina; Reuvers, H.; Smeekes, S. et al

Conference (2015, December 12)

Ethane is the most abundant non-methane hydrocarbon in the Earth's atmosphere and an important precursor of tropospheric ozone. Its monitoring is therefore crucial for the characterization of air quality ... [more ▼]

Ethane is the most abundant non-methane hydrocarbon in the Earth's atmosphere and an important precursor of tropospheric ozone. Its monitoring is therefore crucial for the characterization of air quality and of the transport of tropospheric pollution. Ethane is also an indirect greenhouse gas, influencing the atmospheric lifetime of methane. The main sources of ethane are located in the northern hemisphere, and the dominating emissions are associated to production and transport of natural gas. A preliminary trend analysis was conducted using measurements performed in the Swiss Alps. Over the last two decades, the trend of ethane showed a decline of around 1% per year, thanks to a reduction of fugitive emissions of fossil fuel sources. However, a recent upturn potentially attributed to the massive exploitation of shale gas and tight oil reservoirs in North America was found. The goal is to investigate the presence and form of changes in trend functions using nonparametric techniques. The possible location of such changes is investigated. In addition, nonparametric estimation techniques are used to allow for nonlinear trend functions. Given the nonstandard nature of the measurements we rely on dependent wild bootstrap techniques to conduct inference on possible breaks in linear trends and on nonparametric trend functions. [less ▲]

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See detailSocioeconomic' impacts of the water and soil conservation technics in Maradi, Niger
bode, Sambo; Andres, Ludovic ULg; Dambo, Lawali et al

Conference (2015, December 12)

The Sahelian's environment suffered many perturbations increasing the food insecurity risks. Since three decades, the environment suffered a intense and significant land deterioration (Warren A. And al ... [more ▼]

The Sahelian's environment suffered many perturbations increasing the food insecurity risks. Since three decades, the environment suffered a intense and significant land deterioration (Warren A. And al., 2001). A lot of regreening actions have been developped in the Sahelian countries but some actions are most sustainable and the costs are lower than the other. The International Fund for Agricultural Development (IFAD) has developped some actions to strengthen the natural ressources management. The most important actions have been introduced from the mi-term of 1,980 (Sendzimir J. And al., 2011). These actions concerned the main water and soil conservation technics: Zaï; „contour“ stone bund; half-moons; permeable rock dams (Wesel A., Rath T., 2002). The paper attempts to answer about the following question: „what are the indirect and direct socioeconomic impacts of the natural ressources management in the Maradi’s region ?“. Moreover, Maradi is the historical area of the IFAD actions and illustrates some major causes of land degradation. The main causes are the increase of demography and agricultural areas. In fact, the demography and agricultural area of Maradi are seriously worrying: 8 children per women and the agricultural area is less than 1 hectare per household (Andres L., Lebailly Ph., 2013). The paper relates and describes the main anti-erosion technics. It compared also the cost-benefit analysis about the soil and water conservation technics. Finally, the report try to establish a key who links the technics with the context (soil, people, environment, agriculture, livestock) (Moussa Dit Kalamou M., 2015; Jasmien C.J. and al., 2013). [less ▲]

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See detailHa INTRAARTICULAR INJECTION: THERAPEUTIC AND ECONOMIC CONSIDERATIONS
Henrotin, Yves ULg

Conference (2015, December 12)

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See detailLe complot à l'ère du webdocumentaire par et pour tous. Approche critique.
Hamers, Jérémy ULg

Conference (2015, December 12)

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See detailENMG du nerf tibial et de ses branches
WANG, François-Charles ULg

Conference (2015, December 11)

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See detailPanel presentation on the MLA legal framework and its application to electronic data
Ligeti, Katalin; Franssen, Vanessa ULg

Conference (2015, December 11)

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See detailRimbaud aux frontières du réel.
Saint-Amand, Denis ULg

Conference (2015, December 11)

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See detailDes choses et des corps. Consommation et enjeux de terrain
Mescoli, Elsa ULg

Conference (2015, December 11)

Au départ des études sur la culture matérielle, le lien entre les choses et les sujets, établi par le biais du corps, sera exploré. La consommation, en tant que moyen d’incorporation des objets dans le ... [more ▼]

Au départ des études sur la culture matérielle, le lien entre les choses et les sujets, établi par le biais du corps, sera exploré. La consommation, en tant que moyen d’incorporation des objets dans le soi et dans son propre univers de référence, constituera la porte d’entrée de l’analyse de ce lien. De l’élaboration des choix à la dé-marchandisation des produits, le processus qui engage simultanément choses et sujets jette les bases de la définition individuelle et des relations sociales. L’alimentation en est un exemple concret. Pratique qui stimule la réceptivité multidimensionnelle du corps, elle permet également de s’interroger sur le rôle de celui-ci non seulement dans les dynamiques de consommation mais aussi dans les démarches ethnographiques visant leur compréhension. [less ▲]

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See detailHaro sur les chômeurs: chômage et allocations sociales dans l’opinion publique
Italiano, Patrick ULg; Abts, Koen ULg

Conference (2015, December 11)

La présentation s'appuie sur des données d'enquête internationales (ESS) et longitudinales en Belgique (ISPO) pour faire le point sur la perception du public quant à la légitimité des allocations sociales ... [more ▼]

La présentation s'appuie sur des données d'enquête internationales (ESS) et longitudinales en Belgique (ISPO) pour faire le point sur la perception du public quant à la légitimité des allocations sociales, les responsabilités individuelles et collectives du chômage et le soutien à des politiques punitives à l'égard des chômeurs. [less ▲]

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See detailRessources secondaires et matériaux innovants pour une construction durable
Courard, Luc ULg; Evrard, Arnaud

Conference (2015, December 10)

Le recyclage n'est pas un luxe ou une mode mais une nécessité, qui provient d'une constatation fort simple: nous vivons dans un monde limité. Contrairement à ce que nous avons cru fort longtemps, notre ... [more ▼]

Le recyclage n'est pas un luxe ou une mode mais une nécessité, qui provient d'une constatation fort simple: nous vivons dans un monde limité. Contrairement à ce que nous avons cru fort longtemps, notre activité humaine n'est pas infiniment développable, car limitée en termes d'énergie, de ressources naturelles, d'espace ou simplement de capacité d'adaptation de la nature. De cette constatation et de cette prise de conscience doit découler un comportement qui, essentiellement, est basé sur le respect que nous avons de nous-mêmes et donc de la nature (à ménager et non à aménager). Cette démarche nécessite une vision d'ensemble de la vie du matériau ou de l'objet (Analyse du Cycle de Vie), au cours de laquelle un bilan est établi à chaque étape de vie - extraction des matières premières, fabrication, transformation, recyclage, élimination. Par ailleurs, le monde de la construction constitue à la fois un gisement et un marché énormes. Les ressources secondaires provenant du recyclage et de la biomasse représentent autant de possibilités de développer des nouveaux matériaux mieux adaptés aux exigences physiques et mécaniques. La construction traditionnelle vit en effet de profonds changements liés au fait que la « résistance » n’est plus le seul critère de qualité : l’argile crue, la paille, le miscanthus, …… se retrouvent aujourd’hui à la base de développements expérimentaux et numériques qui contribuent à une meilleure isolation thermique en même temps qu’un confort hygro-thermique mieux adapté. L’habitat exploite les ressources secondaires et les matériaux bio-sourcés en vue d’une meilleure intégration de l’activité humaine dans son environnement naturel, contribuant par là-même à la protection et la préservation de notre patrimoine commun. [less ▲]

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See detailGroundwater and sinking coastal zones: how pumping and drainage create more trouble than climatic changes
Dassargues, Alain ULg

Conference (2015, December 10)

Much attention is paid to sea-level rise due to climate change. However, the problem of land subsidence because of human-induced changes of (fluid) groundwater conditions in the underground can be by far ... [more ▼]

Much attention is paid to sea-level rise due to climate change. However, the problem of land subsidence because of human-induced changes of (fluid) groundwater conditions in the underground can be by far more significant locally (Showstack, 2014). The ‘sinking’ regions correspond most often to densely populated coastal areas located in regions where compressible and under-consolidated loose sediments are found. This is the case in late Quaternary coastal settings consisting of estuarine, deltaic and lagoonal sediments. Venice, Mexico, Bangkok, Shanghai, Changzhou, Jakarta, Manila, New Orleans, Houston, Tokyo, Ho Chi Minh City, Hanoi, … are only a few examples among the numerous ‘sinking cities’ (Gambolati & Teatini, 2015). Late Quaternary, and more particularly Holocene unconsolidated or semi-consolidated deposits form often a succession of layers that can be considered, from a hydrogeological point of view, as semi-confined or confined aquifer systems (Poland, 1984). In confined aquifers but also in unconfined aquifers, the lowering of the piezometric head due to pumping or drainage induces additional effective stresses directly in the concerned aquifer and then, with a delay depending on their characteristics, in the compressible confining layers or in the compressible lenses of silt, clay, and peat included in the aquifer. Coupling the transient groundwater flow equation with geomechanical aspects, allows understanding of the considered transient processes induced by the artificial lowering of the water pressure in the porous medium. For accurate calculations, used for understanding the observed subsidence and predicting the future subsidence, it is important to take into account the strongly non-linear effects such as the variation of the specific storage coefficient and of the permeability during the consolidation process (Dassargues, 1995, 1997, 1998). Typical and emblematic examples involving regional as well as very local land subsidence will be presented showing the general approach. Land subsidence is an important issue linked to global change and groundwater management challenges (Gorelick & Zheng, 2015). [less ▲]

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See detailAménités résidentielles et périurbanisation : enseignements de l'approche hédonique appliquée au marché foncier liégeois
Maldague, Hubert ULg; Halleux, Jean-Marie ULg

Conference (2015, December 10)

La présente communication est une réflexion sur la périurbanisation observée dans le bassin d'emploi de Liège sur base des résultats d'un mémoire de master en sciences géographiques (Maldague, 2014). Les ... [more ▼]

La présente communication est une réflexion sur la périurbanisation observée dans le bassin d'emploi de Liège sur base des résultats d'un mémoire de master en sciences géographiques (Maldague, 2014). Les modèles développés montrent en effet une forte opposition entre la vieille agglomération industrielle délaissée et les périphéries plus vertes et agréables. Cette dualité contribue au maintien de l'importe périurbanisation que connait la région de Liège depuis plusieurs décennies. [less ▲]

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See detailDuality of migrant lives: Gendered migration and agricultural production in Red River Delta region, Vietnam
Nguyen Thi, Dien; Nguyen Thi Minh Khué, ULg; Ngo Trung, Thanh et al

Conference (2015, December 10)

This research analyzes the gender dimensions of labor migration and agricultural production among farm households in Red River Delta region of Vietnam. Through surveying 215 households in Bac Ninh ... [more ▼]

This research analyzes the gender dimensions of labor migration and agricultural production among farm households in Red River Delta region of Vietnam. Through surveying 215 households in Bac Ninh province, the paper explores impacts of female and male migration on agricultural production and its implications on rural development. The results show that in comparison to male migration household, the female one tends to focus on agricultural production by taking the opportunities to rent more land (26.3%) and effective use their own allocated land for agricultural production (97.4%). The overall impacts of migration on agricultural production are the aging of farm labor force (49.6 year old in average) and higher female participation in agricultural production. The findings suggest that female migrants have a greater contribution in agriculture production both in term of working time and agricultural capital investment while male migrants enhance household income by accumulating capital outside agriculture. Through the gender lens, this research emphasizes the duality in the nature of migrant lives and the implications of rural labor migration on the fixed categories. [less ▲]

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See detailPrelimary report of the Programme Committee of World Conference of Humanities
Winand, Jean ULg

Conference (2015, December 09)

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See detailA la recherche des traducteurs. Ou comment faire parler les archives.
Letawe, Céline ULg

Conference (2015, December 09)

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Peer Reviewed
See detailBrûlures domestiques enfants et adultes : les gestes qui sauvent.
ROUSSEAU, Anne-Françoise ULg

Conference (2015, December 08)

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See detailFrom sample hunt to sequence processing, the journey of a biologist
André, Adrien ULg; Millien, Virginie; Michaux, Johan ULg

Conference (2015, December 08)

Metabarcoding studies are becoming more and more popular with a field of applications constantly increasing. However, the methods used are sometimes complex and might remain “obscure” for most of us. The ... [more ▼]

Metabarcoding studies are becoming more and more popular with a field of applications constantly increasing. However, the methods used are sometimes complex and might remain “obscure” for most of us. The objective of this presentation is therefore to familiarize people with this field of research by giving an overview of the different steps permitting the achievement of metabarcoding studies. Field work, lab work and bioinformatics will be subsequently detailed and accessibly explained. [less ▲]

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See detailCombining tree-based and dynamical systems for the inference of gene regulatory networks
Huynh-Thu, Vân Anh ULg; Sanguinetti, Guido

Conference (2015, December 07)

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See detailLaparoscopic management of a traumatic lumbar hernia: about a case
Vandermeulen, morgan; DETRY, Olivier ULg

Conference (2015, December 07)

Traumatic Lumbar hernia (TLH) is a very rare clinical entity with about 100 cases reported worldwide. It is a difficult challenge when encountered and there is no consensus on the best management: early ... [more ▼]

Traumatic Lumbar hernia (TLH) is a very rare clinical entity with about 100 cases reported worldwide. It is a difficult challenge when encountered and there is no consensus on the best management: early or delayed, open or laparoscopic. We report the clinical case of a 28-year-old man who suffered from a TLH after a 6- meter-high fall. The diagnosis was based on CT imaging showing a defect in the postero-lateral abdominal wall by disinsertion of the lumbar origin of transverse, internal and external oblique muscles. A few months after the trauma, it became gradualy more painful, the hernia was clinically increased with a large swelling on the right flank majored by valsalva. CT imaging showed herniation of the right colic flexure through the defect. Eight months after the trauma, we performed an intra-abdominal laparoscopic approach. Herniated structures were reduced and we opened the peritoneum. The defect was repaired by placing a pre-peritoneal polypropylene mesh fixed by laparoscopic staples before closing the peritoneum. The patient had an uneventful recovery. Ten weeks after the surgery the result was clinically very good. The CT scanner showed a good recovery of parietal continuity. [less ▲]

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See detailRecent technical developments of non-invasive cultural heritage analysis at the University of Liège
Strivay, David ULg; Chene, Grégoire ULg; Calvo Del Castillo, Helena ULg et al

Conference (2015, December 07)

The University of Liège has more than twenty years of experience in the use of ion beam analysis techniques for cultural heritage research. We will present here some of the recent developments. First, we ... [more ▼]

The University of Liège has more than twenty years of experience in the use of ion beam analysis techniques for cultural heritage research. We will present here some of the recent developments. First, we have developed a high energy extracted beamline up to 20 MeV on our cyclotron with a good energy resolution of a few keV. These last years Ion Beam Analysis users show an interest in High Energy Alpha beam. These beams can be used for on-site analysis by means of radioactive sources e.g. for space application but they also offer a powerful combination of properties for the analysis of thick layers (about 10 to 20 µm). This kind of layers are often met in cultural heritage applications but can be also present on new materials. Contrary to this kind of materials where the principal information needed is the in-depth profiles as the sample are of known composition, for cultural heritage materials the combination of elemental analysis and their in-depth distribution is essential as the nature of the material is a-priori not known. We will also present the development around our first extracted beamline. We have indeed improved the automatic scanning system for macro-PIXE. Some examples will be shown. Finally we will show other non-invasive analysis developments related to cultural heritage. [less ▲]

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See detailVers des Concessions 2.0 en Afrique Centrale. Reconnaitre et gérer les droits superposés
Karsenty, Alain; Vermeulen, Cédric ULg

Conference (2015, December 05)

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See detailIndicateurs bibliométriques et choix stratégiques de publication. Un regard critique
Leclercq, Bruno ULg

Conference (2015, December 05)

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See detailThe lessons of the first reconstruction in Belgium : Canon Lemaire's "La restauration des monuments anciens" (1938).
Houbart, Claudine ULg

Conference (2015, December 05)

Contrairement à la seconde reconstruction qui reste aujourd’hui largement inexplorée, la première reconstruction en Belgique a fait l’objet de nombreuses recherches et publications. Et pourtant, une ... [more ▼]

Contrairement à la seconde reconstruction qui reste aujourd’hui largement inexplorée, la première reconstruction en Belgique a fait l’objet de nombreuses recherches et publications. Et pourtant, une figure essentielle n’a que très peu retenu l’attention des chercheurs : le chanoine Raymond A.G. Lemaire. Professeur d’archéologie et de restauration à l’université de Louvain, chantre du néogothique dans le sillage de Joris Helleputte, il participe activement aux débats de la reconstruction, non seulement à Louvain, où il est membre de la Commissie voor Stedenschoon, mais dans tout le pays, en tant que membre correspondant de la Commission royale des monuments et des sites et conseiller de l’archevêché de Malines. Auteur de nombreux articles, il synthétise les débats dans “La restauration des monuments anciens”, publiée à Anvers en 1938, tout en développant une approche personnelle se nourrissant de la théorie des valeurs d’Aloïs Riegl et s’approchant de la théorie du “cas par cas” développée à la même époque, en Italie, par Ambroggio Annoni. Bien que les rapports entre les deux hommes ne soient pas documentés dans les archives belges, les nombreux parallèles entre leurs approches, ainsi que le fait que le chanoine Lemaire enverra son neveu, Raymond M. Lemaire, se former chez Annoni en 1943, laissent entendre qu’ils devaient exister. A travers notre participation à la conférence, nous espérons découvrir des éléments susceptibles d’alimenter la poursuite des recherches en ce sens. [less ▲]

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See detailPoint(s) de rupture : Sartre, Merleau-Ponty, la psychanalyse existentielle
Cormann, Grégory ULg

Conference (2015, December 05)

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See detailPotentiels de la carte hydrogéologique de Wallonie : cas concrets.
Bouezmarni, Mohamed ULg; Capette, L.; Rekk, S. et al

Conference (2015, December 04)

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See detailLiver transplantation with extended Milan criteria
DETRY, Olivier ULg

Conference (2015, December 04)

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See detailPapyrus à vendre, papyrus à éditer : plaidoyer pour la traçabilité en papyrologie
Marganne, Marie-Hélène ULg

Conference (2015, December 04)

Plaidoyer pour la traçabilité en papyrologie, spécialement dans le cas des deux nouveaux papyrus de Sappho édités récemment.

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See detailLe fonctionnement exécutif dans le vieillissement normal: Quel rôle accorder aux variables attentionnelles ?
Gilsoul, Jessica ULg; Simon, Jessica ULg; Collette, Fabienne ULg

Conference (2015, December 04)

Introduction. Selon Miyake et al. (2000), le fonctionnement exécutif serait sous-tendu par trois fonctions distinctes - l’inhibition, la flexibilité et la mise à jour - alors que d’autres auteurs (Fisk ... [more ▼]

Introduction. Selon Miyake et al. (2000), le fonctionnement exécutif serait sous-tendu par trois fonctions distinctes - l’inhibition, la flexibilité et la mise à jour - alors que d’autres auteurs (Fisk & Sharp, 2004) suggèrent qu’elles seraient au nombre de quatre (coordination de tâche double). On sait aujourd’hui que l’avancée en âge s’accompagne d’un déclin exécutif. Toutefois, peu d’études ont étudié l’impact de variables non-exécutives (et plus particulièrement attentionnelles) sur la variabilité des performances exécutives dans le vieillissement. Méthode. 114 participants jeunes et 65 participants âgés ont réalisé un ensemble de tâches cognitives évaluant les quatre aspects du fonctionnement exécutif : l’inhibition (Stroop, Anti-saccade, Stop-Signal), la flexibilité (Plus et Moins, Chiffres-Lettres, Global-Local), la mise à jour (Mise à jour sonore, Mise à jour sémantique, Mise à jour de consonnes) et la coordination de tâche double (PASAT, Brown-Peterson, Attention divisée (TEA)). Par ailleurs, nous avons mesuré la vitesse de traitement de l’information (Comparaison de lettres, Stop-signal contrôle, Alerte tonique, Vitesse articulatoire), le fonctionnement attentionnel dans ses aspects d’alerte phasique, d’orientation visuelle externe (Balayage visuel, Motilité oculaire) et d’attention soutenue (Détection d’irrégularités visuelles, Détection de cibles), ainsi que le niveau d’empan. Nous avons tout d’abord comparé les performances des deux groupes sur chacune des tâches exécutives. Pour celles où nous avons observé une différence entre les groupes, nous avons tenté de déterminer si certaines variables non-exécutives pourraient expliquer une part de la variance des performances de nos participants âgés. Résultats. Les comparaisons entre groupes révèlent que les sujets jeunes ont toujours (sauf pour la tâche Stop-Signal) des performances exécutives supérieures à celles des âgés (p<0.01). Lorsque les différentes variables attentionnelles et non-attentionnelles sont introduites dans un modèle de régression multiple stepwise pas à pas, nous observons que les variables attentionnelles expliquent une part significative de la variance pour la tâche Chiffres-Lettres (alerte), la tâche de Mise à jour sémantique (orientation visuelle externe), la tâche de Mise à jour de consonnes (orientation visuelle externe) et la tâche d’attention divisée (alerte et orientation visuelle externe). Discussion. En accord avec de précédentes études, le fonctionnement exécutif décline avec l’âge. Nos résultats indiquent que le déclin de certaines fonctions (mais pas toutes) serait modulé par les capacités attentionnelles. Cette modulation attentionnelle ne serait toutefois pas un processus général, mais dépendrait des caractéristiques propres à chaque tâche. [less ▲]

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See detailImpact du format du test sur la recollection et la familiarité dans le vieillissement normal et le trouble cognitif léger de type amnésique
Simon, Jessica ULg; Gilsoul, Jessica ULg; SALMON, Eric ULg et al

Conference (2015, December 04)

Les tâches de reconnaissance à choix-forcé et oui/non ont largement été utilisées dans l’évaluation de la mémoire. Selon Norman et O’Reilly (2003), le format oui/non ferait davantage intervenir la ... [more ▼]

Les tâches de reconnaissance à choix-forcé et oui/non ont largement été utilisées dans l’évaluation de la mémoire. Selon Norman et O’Reilly (2003), le format oui/non ferait davantage intervenir la recollection alors que le format à choix-forcé favoriserait la comparaison du sentiment de familiarité associé à chaque item et la sélection du plus familier. L’objectif de cette étude est d’explorer l’impact du format du test sur la recollection et la familiarité au travers du vieillissement normal et pathologique. Septante participants jeunes (18 - 30 ans), 65 participants jeunes-âgés (55 - 69 ans), 53 participants âgés-âgés (70-85 ans) et 13 patients présentant un trouble cognitif léger amnésique (55-82 ans) ont réalisé deux tâches de reconnaissance. Pour chaque tâche, lors de l’encodage, nous avons présenté, à deux reprises, 25 images à mémoriser. Dans la tâche de reconnaissance à choix forcé, les participants devaient reconnaitre parmi trois images très semblables celle qui a été vue précédemment. Dans la tâche de reconnaissance oui/non, les items étaient présentés successivement et les participants devaient reconnaitre ceux présentés à l’encodage. Pour chaque item reconnu, les participants devaient fournir un jugement Remember/Know/Guess. Les ANOVA Groupe x Format à mesures répétées sur la dernière variable (p<0,05) ont révélé que les jeunes avaient de meilleures performances en reconnaissance (score d’) que les jeunes-âgés, qui ont eux-mêmes de meilleures performances que les âgés-âgés et les patients. En outre, les jeunes utilisent plus souvent le sentiment de familiarité pour reconnaître les images étudiées que les participants âgés et les patients. De plus, les participants jeunes-âgés utilisent plus souvent la familiarité que les participants âgés-âgés, alors qu’il n’y a pas de différence entre ceux-ci et les patients. Cependant, les fausses alarmes associées à la familiarité augmentent progressivement dans le vieillissement et la pathologie. L’utilisation de la recollection est progressivement réduite avec l’âge et altérée dans la pathologie. Enfin, les jeunes tendent à utiliser plus souvent la recollection dans la tâche à choix-forcé (p=0,055), alors qu’il n’y a pas de différence pour les autres groupes. Tous ces résultats suggèrent que le vieillissement normal s’accompagne d’un déclin progressif de la recollection et de la familiarité. Dans le vieillissement pathologique, on observe des performances similaires au groupe le plus âgé en reconnaissance malgré un déficit de recollection. Les patients utilisent la familiarité autant que les deux groupes âgés bien que les taux de fausses alarmes soient plus importants, suggérant une utilisation privilégiée mais inadéquate de ce processus. [less ▲]

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