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See detailLong-term evolution and seasonal modulation above Jungfraujoch (46.5°N, 8.0°E): Optimisation of the retrieval strategy, comparison with model and independant observations
Bader, Whitney ULg; Stavrakou, T; Muller, J-F et al

in Atmospheric Measurement Techniques. Papers in Open Discussion (2014), 7

Methanol (CH3OH) is the second most abundant organic compound in the Earth's atmosphere after methane. In this work, we present the first long-term time series of methanol total, lower tropospheric and ... [more ▼]

Methanol (CH3OH) is the second most abundant organic compound in the Earth's atmosphere after methane. In this work, we present the first long-term time series of methanol total, lower tropospheric and upper tropospheric-lower stratospheric partial columns derived from the analysis of high resolution Fourier transform infrared solar spectra recorded at the Jungfraujoch station (46.5° N, 3580 m a.s.l.). The retrieval of methanol is very challenging due to strong absorptions of ozone in the region of the selected υ8 band of CH3OH. Two wide spectral intervals have been defined and adjusted in order to maximize the information content. Methanol does not exhibit a significant trend over the 1995–2012 time period, but a strong seasonal modulation characterized by maximum values and variability in June–July, minimum columns in winter and a peak-to-peak amplitude of 130%. In situ measurements performed at the Jungfraujoch and ACE-FTS occultations give similar results for the methanol seasonal variation. The total and lower tropospheric columns are also compared with IMAGESv2 model simulations. There is no systematic bias between the observations and IMAGESv2 but the model underestimates the peak-to-peak amplitude of the seasonal modulations. [less ▲]

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See detailLocusts and Grasshoppers: Future Foods?
Paul, Aman ULg; Frederich, Michel ULg; Uyttenbroeck, Roel ULg et al

Scientific conference (2014, May 08)

Consuming locusts and grasshoppers as food is not a new concept, because some people have been doing it for a long time and there are many references in the religious literature to support this. About 80 ... [more ▼]

Consuming locusts and grasshoppers as food is not a new concept, because some people have been doing it for a long time and there are many references in the religious literature to support this. About 80 locust and grasshopper species are consumed worldwide, and the large majority of grasshopper species are edible. From the nutritional point of view they are an excellent source of proteins, lipids and other minor components like vitamins and minerals. They are an excellent source of amino acids and their lipids contain a large majority of unsaturated fatty acids. Environmentalists have supported human consumption of grasshoppers owing to the facts that they usually appear as pests. Using them as food could help reduce their population and result in limited application of harmful pesticides. Their production usually generates lesser amount of greenhouse gases & ammonia; a lower amount of water is required for their production in comparison to conventional proteins sources. Some species of grasshoppers usually feed on dead organic matter, this reduces the environmental load. In the developing world, catching of grasshoppers and selling them for human consumption has played a key role in improving the livelihood of women and underprivileged children. Eating grasshopper and locust is not a very common practice in temperate areas. However it is a very common practice in the tropical areas of world because of the higher density, bigger size of the insect and yearlong availability in such areas. To encourage their consumption in temperate areas, it is now necessary to perform accurate research regarding food safety (minor components, toxicity, allergens,…) but also to develop value added products to make it easier for people to adapt with entomophagy. Furthermore we have to develop methods for commercial production and organize awareness campaigns to explain about the nutritional and other benefits related to locust & grasshopper consumption as food to people. [less ▲]

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See detailTrend evolution of Carbonyl Sulfide above Jungfraujoch
Lejeune, Bernard ULg

Conference (2014, May 08)

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See detailDes indices de la perception du temps à son implication dans le quotidien. L’évolution développementale de la perception de la durée.
SCHOLL, Jean-Marc ULg

Conference (2014, May 08)

Introduction La perception du temps a un retentissement majeur dans la vie quotidienne. Son déficit altère la capacité de l’enfant à intégrer le temps à la corporéité de son être et de ses activités ... [more ▼]

Introduction La perception du temps a un retentissement majeur dans la vie quotidienne. Son déficit altère la capacité de l’enfant à intégrer le temps à la corporéité de son être et de ses activités. Seule le temps séquentiel est généralement évalué. Il n’existe pas de repères sémiologiques de la durée du temps, ni d’outils pour l’évaluer. Son évolution développementale est inconnue. Nous nous proposons d’évaluer la perception de la durée par des marqueurs sémiologiques en milieu écologique dans une population générale d’enfants et une population d’enfants avec une psychopathologie. Méthode Un questionnaire parental a été créé pour observer la perception du temps et appliqué dans 2 populations d'enfants de 2,5 à 12 ans : 827 enfants en population générale et 297 enfants consultant des Services de Santé Mentale (population transnosographique). Une régression logistique multinominale donne des courbes de percentiles (P5, P50, P95). Résultats Dans la population générale, la perception de la durée est progressivement acquise avec une pleine compétence à 9 ans. Le temps séquentiel est acquis à 4 ans. Dans la population consultant en SSM, la moyenne de la perception de la durée est retardée de 18 mois et demeure faible à 13 ans. Il n’y a pas de différences selon le sexe. Discussion La perception de la durée est une importante caractéristique développementale non prise en compte jusqu’à présent. Des enfants consultants en santé mentale ont un déficit de cette perception. Les marqueurs sémiologiques du questionnaire parental mis au point relèvent ces difficultés dans la vie quotidienne de l’enfant. Mots-clés Perception du temps ; durée du temps ; temps séquentiel ; psychologie développementale ; questionnaire parental [less ▲]

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See detailMagnetospheric dynamics at Jupiter and Saturn
Palmaerts, Benjamin ULg

Speech (2014)

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See detailExtension of the Direct Strength Method to hot-rolled and welded H profile cross-sections
Li, Yongzhen ULg

Doctoral thesis (2014)

The cross-sectional capacity is limited by material yielding on one hand and local buckling on the other hand. Most current metallic structural design codes use the concept of section classification for ... [more ▼]

The cross-sectional capacity is limited by material yielding on one hand and local buckling on the other hand. Most current metallic structural design codes use the concept of section classification for determining the section capacity of hot-rolled profiles. In this system, there exists a discontinuity between the classes 2 and 3 under pure bending load condition, while for the class 4, the effective width method (EWM) must be used to account for local buckling phenomenon. With the appearance of the more complex cross-sections, especially for thin-walled steel structures, the calculation using EWM becomes more and more intolerable and complicated. In order to overcome these difficulties when evaluating the cross-section strength, the alternative Direct Strength Method (DSM) approach, developed only for cold-formed thin-walled members, has gained importance over the last few years, and has been adopted by the North American and Australian standards for the design of cold-formed steel structural members recently. This thesis investigates the possibility to extend the DSM method to hot-rolled and welded structural steel members, and the objective is to derive a new formulation that would cover the whole field of section slenderness without section classification system used in Eurocode 3, using the same procedure for the DSM developed for cold-formed thin-walled steel structural members. Hot-rolled and welded H sections are mainly considered in this thesis. The DSM is premised on the assumption that the strength can be predicted from the yield strength to the elastic critical load ratio used in conjunction with a strength curve; i.e. the same concept than the one used in Eurocode 3, in terms of member buckling phenomenon. In the DSM approach applied for cold-formed thin-walled sections, local buckling and distortional buckling modes should be considered. For common hot-rolled or welded sections, only local buckling needs to be considered since distortional buckling does not occur for these sections. All available test results in literature are collected and evaluated with the current methods for calculating the cross-section resistance such as EWM, DSM, and the recent Continuous Strength Method (CSM). A short comparison is made and their domains of applicability are commented. A consistent approach has been adopted to develop numerical models for hot-rolled and welded sections subjected to compression and bending respectively. The FE model was built in FineLg and verified against test results of the “Semi-comp: Plastic member capacity of semi-compact steel sections - a more economic design” project, which was carried out earlier with the objective of improving the utilization of plasticity in rolled and welded sections with medium cross-section slenderness. Measured material and geometric properties, initial geometrical imperfections and residual stresses distributions have been highlighted. Once verified against the test results, the FE models have been used to carry out a parametrical study aimed at providing more FE results and highlighting the local buckling interaction between the webs and the flanges. All the experimental and FE numerical results constitute data base for the derivation of the new DSM curves. On the basis of Winter Formula for plate buckling and the generic DSM strength curve, different formulas are proposed for hot-rolled and welded H cross-sections under axial and bending load respectively. Also the statistical evaluation and safety study is conducted to obtain the safety factor γ_M, which is required for practical design. [less ▲]

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See detailNumerical Simulation of a Conical Shape Made by Single Point Incremental Forming
Velosa De Sena, José ULg; Duchene, Laurent ULg; Habraken, Anne ULg et al

in Incremental sheet forming (2014, May 08)

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See detailL'hypertension artérielle
Krzesinski, Jean-Marie ULg

Conference (2014, May 08)

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See detailLa régionalisation de l'IPP. Quel impact pour les communes ?
Husson, Jean-François ULg

Conference (2014, May 08)

Cette contribution évoque les problèmes et questions soulevées par la régionalisation de l'impôt des personnes physiques dans le cadre de la 6e réforme de l'Etat. Les questions liées au "fiscal mix" sont ... [more ▼]

Cette contribution évoque les problèmes et questions soulevées par la régionalisation de l'impôt des personnes physiques dans le cadre de la 6e réforme de l'Etat. Les questions liées au "fiscal mix" sont notamment abordées. [less ▲]

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See detailLa régionalisation de l’impôt des personnes physiques
Bourgeois, Marc ULg; Bayenet, Benoit

Scientific conference (2014, May 08)

See detailAbout almost periodic sequences of integers and related concepts
Crama, Yves ULg

Scientific conference (2014, May 07)

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See detailCOMPARISON AND MOLECULAR CHARACTERIZATION OF ANIMAL AND HUMAN CLOSTRIDIUM DIFFICILE STRAINS
Rodriguez Diaz, Cristina ULg; Taminiau, Bernard ULg; Korsak Koulagenko, Nicolas ULg et al

Poster (2014, May 07)

The main objective of this study was to characterize and compare animal and human C. difficile strains with respect to the PCR-ribotype and the antibiotic resistance. Multilocus sequence typing analysis ... [more ▼]

The main objective of this study was to characterize and compare animal and human C. difficile strains with respect to the PCR-ribotype and the antibiotic resistance. Multilocus sequence typing analysis (MLST) was performed in order to study clonal relationships of the isolates. [less ▲]

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See detailContributions à l’amélioration des systèmes d’évaluations génétiques
Vanderick, Sylvie ULg; Gengler, Nicolas ULg

Conference given outside the academic context (2014)

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See detailL'Etat congolais souverain ou sous-tutelle? Essai d'analyse de la dynamique politique nationale.
Baenda Fimbo, Zacharie ULg

Scientific conference (2014, May 07)

Après la définition de certains concepts tels que l'Etat, la souveraineté et la tutelle, la présente communication a analysé la dynamique politique congolaise à travers l'histoire. De la première ... [more ▼]

Après la définition de certains concepts tels que l'Etat, la souveraineté et la tutelle, la présente communication a analysé la dynamique politique congolaise à travers l'histoire. De la première république à la troisième. Des interventions étrangères ayant divisé les leaders politiques congolais pendant la première législative à la présence quasi permanente de la Communauté internationale à travers la Mission des Nations Unies au Congo, en passant par la deuxième république de Mobutu, les réalités locales laissent voir que certaines décisions politiques, voire certaines prises de position sont dictées de l'étranger. Les faits analysés fait douter l'applicabilité de la notion de souveraineté à la gestion politique de l'Etat congolais. [less ▲]

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See detailPolitiques institutionelles et migrations. Quelle place les institutions belges laissent-elles à la diversité ?
Grandjean, Geoffrey ULg

Conference given outside the academic context (2014)

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