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See detailX-ray CT study of the influence of liquid viscosity on fluid phase distribution in modular catalytic packings
Aferka, Saïd ULg; Viva, Aurora; Brunazzi, Elisabetta et al

in Chemical Engineering Transactions (2011), 24

In the frame of the present study, the influence of liquid viscosity on liquid holdup distribution in a packed column equipped with the modular catalytic packing Katapak-SP 11 is measured. Water and an ... [more ▼]

In the frame of the present study, the influence of liquid viscosity on liquid holdup distribution in a packed column equipped with the modular catalytic packing Katapak-SP 11 is measured. Water and an aqueous solution of glycerine, the viscosity of which equals 10 cP, are used as feed liquids. The estimation of liquid holdup is of great interest due to its strong influence on pressure drop, on solid wetting and on heat and mass transfer coefficients. The experimental technique used is high energy X-ray tomography, which is a unique technique to visualize the local liquid distribution inside the complex structure of packings and to quantify the liquid holdup at different scales. [less ▲]

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See detailL'exemple en question
Letawe, Céline ULg; Cormann, Grégory ULg

in MethIS : Méthodes et Interdisciplinarité en Sciences Humaines (2011)

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See detailSelf-DNA release mediates the adjuvant effects of aluminum salts
Marichal, Thomas ULg; Ohata, K; Bedoret, Denis et al

Poster (2011)

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See detailEuropese rechtspraak : actualia
Durviaux, Ann-Lawrence ULg

in Marchés et Contrats Publics = Overheidsopdrachten en -Overeenkomsten (2011), 2011/3

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See detailRegM - Registre de Morbidité
Vanmeerbeek, Marc ULg; Franckh, Marc; Froidcoeur, Xavier ULg

Report (2011)

REGM is a research program about the feasibility of a Belgian morbidity registration system, extracted from existing electronic information systems (EMR) of general practitioners. REGM is part of a larger ... [more ▼]

REGM is a research program about the feasibility of a Belgian morbidity registration system, extracted from existing electronic information systems (EMR) of general practitioners. REGM is part of a larger program which aims to enhance the development of primary health care and improve the quality of care. This part is aimed at the description of three experiments: in France, Switzerland and the Netherlands. [less ▲]

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See detailPhysical modelling of overbank flows with a groyne set on the floodplain
Peltier, Yann ULg

Doctoral thesis (2011)

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See detailOptimizing early nutritional support based on recent recommendations in VLBW infants and postnatal growth restriction
SENTERRE, Thibault ULg; Rigo, Jacques ULg

in Journal of Pediatric Gastroenterology and Nutrition (2011), 53(5), 536-542

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See detailFirst retrievals of carbon tetrafluoride (CF4) from ground-based FTIR measurements: production and analysis of the two-decadal time series above the Jungfraujoch
Duchatelet, Pierre ULg; Zander, Rodolphe ULg; Mahieu, Emmanuel ULg et al

in Geophysical Research Abstracts (2011)

Carbon tetrafluoride (CF4 or PFC-14) is a potent greenhouse gas that is almost 7400 times more effective (100-yr horizon) than CO2 on a per molecule basis (IPCC, 2007). This high global warming potential ... [more ▼]

Carbon tetrafluoride (CF4 or PFC-14) is a potent greenhouse gas that is almost 7400 times more effective (100-yr horizon) than CO2 on a per molecule basis (IPCC, 2007). This high global warming potential, coming from its medium absorbance combined with a very long atmospheric lifetime (>50000 years; Ravishankara et al., 1993), makes CF4 a key species among the various greenhouse gases targeted by the Kyoto Protocol. In the Northern hemisphere, current atmospheric CF4 concentrations are close to 78 pptv, with a large fraction (around 35 pptv, Mühle et al., 2010) coming from natural processes like lithospheric emissions (Harnisch and Eisenhauer, 1998). In addition, CF4 has been used increasingly since the eighties in electronic and semiconductors industry. The primary aluminum production processes have also been clearly identified as an important anthropogenic source of CF4 emissions. The partitioning between these two main sources is however problematic, principally due to lacking or incomplete CF4 emission factors from inventories performed in industrial fields (e.g. International Aluminum Institute, 2009). Recent in situ ground level measurements of CF4 in the Northern hemisphere (Khalil et al., 2003; Mühle et al., 2010) or remotely from space (Rinsland et al., 2006) have indicated a significant slowdown in the increase rate of atmospheric CF4. This probably results from measures adopted by the aluminum industry aiming at the reduction of the frequency and duration of “anode effects” and therefore of related PFCs emissions (International Aluminum Institute, 2009). The present contribution reports on the long-term evolution (1990-2010) of the atmospheric carbon tetrafluoride total vertical abundance derived from ground-based Fourier transform infrared (FTIR) solar spectroscopy observations around 1285 cm-1 at the Jungfraujoch (46.5°N, 8.0°E, 3580m asl) and compares our findings with results available in the literature. To our knowledge, no equivalent time series (i.e. based on ground-based FTIR technique) has been published to date. [less ▲]

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See detailYBa2Cu3O7−x dispersion in iodine acetone for electrophoretic deposition: Surface charging mechanism in a halogenated organic media
Dusoulier, Laurent; Cloots, Rudi ULg; Vertruyen, Bénédicte ULg et al

in Journal of the European Ceramic Society (2011), 31

Electrophoretic deposition (EPD) performance strongly depends on the particles surface chemistry and the ability to manipulate surface–liquid interfaces. In this study an extensive investigation of YBCO ... [more ▼]

Electrophoretic deposition (EPD) performance strongly depends on the particles surface chemistry and the ability to manipulate surface–liquid interfaces. In this study an extensive investigation of YBCO suspension in dry acetone, acetone–water mixtures and acetone–iodine is reported. Chemical instability of YBCO particles determines their colloidal behaviour. Charging mechanism of particles has therefore had to be deeply investigated for complete dispersion understanding. In order to determine the conditions of the YBCO suspension stability, measurements of pH, conductivity, zeta-potential, settling tests, modelling of the particle networks and electrophoretic deposition were done. The influence of the water and iodine concentration, and their role as stabilizers was evaluated. Based on experimental results, pair particle potentials were calculated and then different charging mechanisms of YBCO surfaces in acetone were proposed. [less ▲]

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See detailHet 'mysterie' Tandem: Kinkers studentengenootschap te Luik
Steyaert, Kris ULg

in Vosters, Rik; Weijermars, Janneke (Eds.) Taal, cultuurbeleid en natievorming onder Willem I (2011)

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See detailLes phéromones d'alarme dans le règne animal
Verheggen, François ULg; Haubruge, Eric ULg

in Entomologie Faunistique = Faunistic Entomology (2011), 63(4), 259-274

Many animals respond to predation by releasing alarm signals that warn other individuals of the presence of danger in order to reduce the success of predators. While alarm signals may be visual or ... [more ▼]

Many animals respond to predation by releasing alarm signals that warn other individuals of the presence of danger in order to reduce the success of predators. While alarm signals may be visual or auditory as well as chemical, alarm pheromones are common, especially among insects and aquatic organisms. In this paper we discuss our current understanding of chemical alarm signaling in a variety of animal groups (including social and pre-social insects, marine invertebrates, fish, and mammals). We also briefly discuss the exploitation of alarm pheromones as foraging cues for natural enemies. [less ▲]

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See detailSynthesis and organocatalytic applications of imidazol(in)ium-2- thiocarboxylates
Hans, Morgan ULg; Wouters, Johan; Demonceau, Albert ULg et al

in European Journal of Organic Chemistry (2011), (35), 7083-7091

Five imidazol(in)ium-2-thiocarboxylates bearing cyclohexyl, mesityl, or 2,6-diisopropylphenyl substituents on their nitrogen atoms were prepared from the corresponding imidazol(in)ium chlorides or ... [more ▼]

Five imidazol(in)ium-2-thiocarboxylates bearing cyclohexyl, mesityl, or 2,6-diisopropylphenyl substituents on their nitrogen atoms were prepared from the corresponding imidazol(in)ium chlorides or tetrafluoroborates in a one-pot, two-step procedure involving the in situ generation of free N-heterocyclic carbenes (NHCs) with a strong base followed by trapping with carbonyl sulfide. The resulting NHC•COS zwitterions were isolated in high yields and characterized by IR and NMR spectroscopy. The molecular structure of SIMes•COS was determined by X-ray diffraction analysis. Experimental data and DFT calculations indicated that the negative charge on the thiocarboxylate anion is preferentially delocalized on the sulfur atom. Thermogravimetric analysis showed that the NHC•COS zwitterions undergo thermolysis at temperatures ranging between 110 and 180 °C in the solid state. They are also rather labile in solution. Unlike the related NHC•CS2 betaines, which are highly stable, crystalline materials, they displayed the same type of behavior as the analogous carboxylate adducts, which readily lose their CO2 moiety upon heating or dissolution. Thus, imidazol(in)ium-2-thiocarboxylates acted as convenient NHC precursors in two model organocatalytic transformations. Of the five thiocarboxylates examined, ICy•COS was the most efficient at promoting the acylation of benzyl alcohol with vinyl acetate, whereas SIMes•COS afforded the highest activity in benzoin condensation. [less ▲]

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See detailGalectin-9 splice variants in endothelial cells: identification of novel variants and functional characterization
Heusschen, Roy ULg; De Bree, Martijn; Griffioen, Arjan et al

in Angiogenesis (2011)

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See detailOptimal and robust event-related designs for fMRI
Maus, Bärbel ULg; van Breukelen, Gerard J P; Goebel, R et al

Conference (2011)

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See detailClosure to "Energy Dissipation and Turbulent Production in Weak Hydraulic Jumps" by E. Mignot and R. Cienfuegos
Mignot, E.; Peltier, Yann ULg; Cienfuegos, R.

in Journal of Hydraulic Engineering (2011), 137(8), 862-863

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See detailReview of Dear Charles, Dear Janet: Frame and Brasch in Correspondence
Delrez, Marc ULg

in Commonwealth : Essays and Studies (2011), 33.2(Spring 2011), 151-153

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See detailA partial hybrid stress solid-shell element for the analysis of laminated composites
Rah, Kamran; Van Paepegem, Wim; Habraken, Anne ULg et al

in Computer Methods in Applied Mechanics and Engineerinrg (2011), 200(49-52), 35263539

In this paper a low order partial hybrid stress solid-shell element based on the composite energy functional for the analysis of laminated composite structures is presented. This solid-shell element has ... [more ▼]

In this paper a low order partial hybrid stress solid-shell element based on the composite energy functional for the analysis of laminated composite structures is presented. This solid-shell element has eight nodes with only displacement degrees of freedoms, and three-dimensional constitutive models can be directly employed in the present formulation without any additional treatment. The assumed interlaminar stress field provides very accurate interlaminar stress calculation through the element thickness. These elements can be stacked on top of each other to model multilayer structures, fulfilling the interlaminar stress continuity at the interlayer surfaces and zero traction conditions on the top and bottom surfaces of the laminate. The present solid-shell does not show the transverse shear, trapezoidal and thickness locking phenomenon. [less ▲]

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See detailPsychosocial risk and protective factors of secondary school dropout in Luxembourg: the protocol of an exploratory case-control study.
Esch, Pascale; Bocquet, Valery; Pull, Charles et al

in BMC Public Health (2011), 11

BACKGROUND: In Luxembourg, the extensive phenomenon of school dropout is a prime policy concern in the light of individual, social and economic consequences. Although the authorities report an overall ... [more ▼]

BACKGROUND: In Luxembourg, the extensive phenomenon of school dropout is a prime policy concern in the light of individual, social and economic consequences. Although the authorities report an overall decrease of the national dropout rate, the proportion of early school leavers who remain without any specific occupation is still alarming. Therefore, this study intends a shift of focus from system-inherent to individual factors, including mental health and family correlates, to provide a more comprehensive analysis of the dropout phenomenon. METHODS/DESIGN: The objectives of this study are to investigate the type and prevalence of psychiatric disorders among school dropouts and to compare the findings with those by a matched control group of regularly enrolled students. Furthermore, family variables and socioeconomic status will be analysed, as they are factors likely to interfere with both educational attainment and mental health. A trained psychologist will use structured interviews and self-report forms to investigate for mental health issues, information on schooling, socioeconomic situation and family life. Controls will be matched for gender, age, school type and educational grade. DISCUSSION: As school dropouts face a serious risk of long term professional and social marginalization, there is an evident need for action. Identifying psychosocial risk and protective factors of school dropout will deliver solid insight on how to conceive public health strategies for young people who may need a more customized support to carry out their academic potential. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT01354236. [less ▲]

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See detail"Quand le français traverse l'Atlantique". Le concept d'histoire de la langue et ses enjeux dans le traitement historiographique des variétés de français d'Amérique du Nord
Urbain, Emilie ULg

in Barbeau, Geneviève Bernard; Gagné, Caroline; Leblanc, Guillaume (Eds.) Actes des XXIVes Journées de linguistique (2011)

À travers l’analyse contrastée de deux manuels récents d’histoire de la langue française, l’un exclusivement rédigé par deux auteures françaises (Histoire de la langue française de Picoche et Marchello ... [more ▼]

À travers l’analyse contrastée de deux manuels récents d’histoire de la langue française, l’un exclusivement rédigé par deux auteures françaises (Histoire de la langue française de Picoche et Marchello-Nizia), l’autre faisant appel à des chercheurs des deux côtés de l’Atlantique (Nouvelle histoire de la langue française, sous la direction de Jacques Chaurand), nous avons l’ambition de mettre au jour les enjeux idéologiques qui se cachent parfois derrière la rédaction d’une histoire de la langue. Nous étudions, d’une part, l’agencement et les grandes orientations prises par les manuels et, d’autre part, les choix terminologiques qu’ils font et les thèmes qu’ils développent. L’analyse s’articule autour du rapport à plusieurs notions clés, notamment celles de francophonie, d’identité et de norme. Ces différents critères permettent de dégager des positions très différentes par rapport à la conception même des variétés dont il est question, leurs divergences les plus nettes se manifestant dans la relation entretenue avec l’idéologie du francocentrisme et avec le normativisme. Nous confrontons ensuite les points de vue défendus dans les deux manuels à ceux qu’illustre le traitement historiographique des mêmes variétés dans des ouvrages sur la variation du français hors de France et sur le français en Amérique du Nord. En particulier, l’étude des chapitres consacrés à la genèse des créoles à base française et à leur description ainsi que celle de la terminologie utilisée pour en rendre compte montrent comment des enjeux idéologiques sont bien présents dans des catégorisations d’apparence consensuelle. [less ▲]

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