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See detailCes essences importantes que l’on retrouve en forêt claire (miombo)
Hick, Aurélie ULg; Hallin, Maud; Kizika Wimana, Pacifique et al

Poster (2013, November 29)

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See detailUn sociologue au pays du libre
Lejeune, Christophe ULg

Conference (2013, November 29)

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See detailDeterminanten bij bedrijfsartsen in hun aanpak van middelenmisbruik van werknemers
Lambrechts, M.C.; Ketterer, Frédéric ULg; Symons, Linda et al

Conference (2013, November 28)

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See detailIslamic food practices in migration context. An ethnography among Moroccan women in Milan.
Mescoli, Elsa ULg

in Toguslu, Erkan; Leman, Johan; Ozdemir, Saliha (Eds.) Everyday Life Practices of Muslims in Europe: Consumption and Aesthetics. (2013, November 28)

My study focuses on the culinary practices of Moroccan women living in Milan hinterland in Italy. By adopting a praxeological approach (Warnier 2001), I study female subjectivation processes realized ... [more ▼]

My study focuses on the culinary practices of Moroccan women living in Milan hinterland in Italy. By adopting a praxeological approach (Warnier 2001), I study female subjectivation processes realized through food. My attention is given to (micro)practices (De Certeau 1980, Foucault in Martin 1993, Mahmood 2005, Mauss 1936) performed daily, by means of which the women considered shape their self and affirm their religious belonging in private and in public contexts. Islamic normativity concerning food issues is at matter here, thus being analyzed in its multifaceted complexity. As a matter of fact, the actors involved need to face the constraints imposed by the migration context while trying to comply with religious rules, in their turns intertwined with remembered embodied practices. This implies some negotiations to be made, in particular concerning a different articulation of time, but also the mobilization of tactics and strategies (De Certeau 1980) to guarantee a reassuring proper self-definition. In the private space, food practices keep on being influenced not only by the Islamic dietary prescriptions affirming what is not possible to eat, but also by the indications stressing what to eat – and eventually when and how to prepare it. A private consumption, reflecting a specific belief, materially informs a spiritual definition of the self. Furthermore, such dynamics go out the domestic context and perform in the public space. Everyday practices, and in particular those related to food, let an expression of Muslim migrants’ identity be realized in overdetermined backgrounds such as that which is under study. As a matter of fact, by preparing and sharing food, Moroccan women participate to local events - and consequently to the city social life - and thus they are allowed to affirm in public their religious belonging and some related claims. The so called “ethnic food” is protagonist of numerous intercultural events, aimed at letting an encounter with religious diversity take place in the perspective of a culture to taste. In those occasions, once a relationship is set up, other important issues can be approached, such as that of the freedom to practice religion. My presentation will try to highlight such complex dynamics, stressing on the materiality of religious subjectivation. Photos and videos recording everyday practices and objects will be used to visually support the reflections presented. De Certeau, Michel (1980). L’invention du quotidien. Tome I. Arts de faire. Paris: Gallimard. Mahmood, Saba (2005). Politics of piety: the Islamic revival and the feminist subject, Princeton, N.J.: Princeton University Press. Martin, Luther H.; Gutman, Huck e Hutton, Patrick H. (eds.) (1992). Tecnologie del sé. Un seminario con Michel Foucault, Torino: Bollati Boringhieri. Mauss, Marcel (1936). Les techniques du corps, in Journal de Psychologie, XXXII, ne, 3-4, 15 mars - 15 avril. Warnier Jean-Pierre (2001). A praxeological approach to subjectivation in a material world, in Journal of Material Culture, Vol. 6(1): 5–24. [less ▲]

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See detailIntroduction / Conclusions
Saint-Amand, Denis ULg

Conference (2013, November 28)

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See detailFormulation d'un projet de recherche : à propos du discours des « Nouveaux Réactionnaires »
Durand, Pascal ULg; Sindaco, Sarah ULg

Scientific conference (2013, November 28)

Les années 1990-2000 ont été marquées, en France, par l'émergence d'un courant de pensée et d'une nébuleuse d'acteurs intellectuels communément rassemblés sous l'étiquette des « Nouveaux Réactionnaires » ... [more ▼]

Les années 1990-2000 ont été marquées, en France, par l'émergence d'un courant de pensée et d'une nébuleuse d'acteurs intellectuels communément rassemblés sous l'étiquette des « Nouveaux Réactionnaires » (tels que Pascal Bruckner, Alain Finkielkraut, Alexandre Adler, Philippe Muray, Jean Clair, Éric Zemmour, Michel Houellebecq, etc.). Journalistes, romanciers, essayistes, chroniqueurs, philosophes, affichant une posture de refus à l'égard du politiquement correct, de la gauche morale et de la pensée unique, ils forment une sorte de personnage générique, composé de singularités en rupture avec toute assignation sociologique. Le projet de recherche entend dresser le tableau raisonné de ce collectif dispersé, sous les deux rapports d'une sociographie de groupe et d'une analyse rhétorique de leur discours ; il entend aussi mettre à l'épreuve différentes hypothèses explicatives sur l'émergence historique et politique du phénomène. [less ▲]

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See detailStimuli-responsive magnetic nanohybrids for triggered drug release and potential tumor treatment via hyperthermia
Liu, Ji ULg; Detrembleur, Christophe ULg; Mornet, Stéphane et al

in Journal of Controlled Release (2013, November 28), 172(1), 39

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See detailSearching for companions down to 2 AU from β Pictoris using the L'-band AGPM coronagraph on VLT/NACO
Absil, Olivier ULg; Milli, J.; Mawet, D. et al

in Astronomy and Astrophysics (2013), 559

Context. The orbit of the giant planet discovered around β Pic is slightly inclined with respect to the outer parts of the debris disc, which creates a warp in the inner debris disc. This inclination ... [more ▼]

Context. The orbit of the giant planet discovered around β Pic is slightly inclined with respect to the outer parts of the debris disc, which creates a warp in the inner debris disc. This inclination might be explained by gravitational interactions with other planets. <BR /> Aims: We aim to search for additional giant planets located at smaller angular separations from the star. <BR /> Methods: We used the new L'-band AGPM coronagraph on VLT/NACO, which provides an exquisite inner working angle. A long observing sequence was obtained on β Pic in pupil-tracking mode. To derive sensitivity limits, the collected images were processed using a principal-component analysis technique specifically tailored to angular differential imaging. <BR /> Results: No additional planet is detected down to an angular separation of 0.''2with a sensitivity better than 5 M[SUB]Jup[/SUB]. Meaningful upper limits (<10 M[SUB]Jup[/SUB]) are derived down to an angular separation of 0.''1, which corresponds to 2 AU at the distance of β Pic. [less ▲]

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See detaildilemmas in cluster analysis
Sauvageot, Nicolas ULg

Conference (2013, November 27)

Cluster analysis is a set of multivariate procedures to detect natural groupings in data. The objective of those methods is to group a set of objects in such a way that objects in the same group (called ... [more ▼]

Cluster analysis is a set of multivariate procedures to detect natural groupings in data. The objective of those methods is to group a set of objects in such a way that objects in the same group (called cluster) are more similar to each other than to those in other groups. Organizing data into sensible groupings arises naturally in many scientific fields as psychology, biology, statistics, bioinformatics, marketing, and so on. However, the obtained solution is not unique and it strongly depends upon the analyst’s choices. Representation and normalization scheme, selection of distance measures and a clustering algorithm, choice of the number of clusters and their interpretations are all subjective choices which change the final output. Those decisions are mainly guided by the purpose of grouping, domain knowledge and the individual data set. Therefore, cluster validity assessment should be performed to evaluate the validity of the obtained clusters and to find the partitioning that best fits the underlying data. I provide a brief overview of clustering, summarize well known algorithms, and discuss the major challenges and key issues in performing clustering analysis. [less ▲]

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See detailBio-based paints
Olive, Gilles ULg; Richel, Aurore ULg

Poster (2013, November 27)

Paints, at the coating meaning, are known since a long time. Typically, paint is a dispersion of one or more powders (pigments and fillers) in a macromolecular substance ("resin"), called film-forming ... [more ▼]

Paints, at the coating meaning, are known since a long time. Typically, paint is a dispersion of one or more powders (pigments and fillers) in a macromolecular substance ("resin"), called film-forming material, diluted in solvents. [less ▲]

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See detailAssessment of bioinformatic pipelines for the analysis of 454 pyrosequencing data using artificial cyanobacterial communities
Stelmach Pessi, Igor ULg; De Carvalho Maalouf, Pedro; Laughinghouse IV, Haywood ULg et al

Poster (2013, November 27)

The field of microbial ecology has undergone a revolution with the advent of next-generation sequencing (NGS) technologies, which revealed a higher microbial diversity than what was previously observed ... [more ▼]

The field of microbial ecology has undergone a revolution with the advent of next-generation sequencing (NGS) technologies, which revealed a higher microbial diversity than what was previously observed. The possibility of analyzing tens to hundreds of thousands sequences in a single sequencing run has provided information on rare taxa that could constitute an important fraction of microbial communities. However, this comes with the cost of relatively high error rates for individual reads, which can lead to overestimation of diversity due to the generation of spurious Operational Taxonomic Units (OTUs) consisting of erroneous sequences. Therefore, a correct assessment of microbial diversity using NGS relies on robust bioinformatic tools in order to correct for PCR and sequencing biases. Here we report on community structures recovered for two artificial cyanobacterial communities applying three commonly used and two recently published bioinformatic pipelines. This pilot study was made in the frame of the BELSPO project CCAMBIO. Artificial communities were constructed using DNA isolated from 22 cyanobacterial strains from the BCCM/ULC Polar Cyanobacteria Collection (http://bccm.belspo.be/about/ulc.php). DNA was extracted from individual cultures and pooled at equal (community Art1) or tiered (community Art2) concentrations. The V3-V4 hypervariable region of the 16S rRNA gene was amplified by PCR using primers 359F and 781Ra/781Rb [Nübel et al (1997) Appl Environ Microbiol 63: 3327-3332], and amplicons were sequenced on a 454 GS FLX Titanium platform. Data was demultiplexed and submitted to five bioinformatic pipelines for quality control of reads, removal of chimeric sequences and Operational Taxonomic Units (OTUs) clustering: (I) “shhh.flows (450 flows)”, (II) “shhh.flows (360-720 flows)” and (III) “Sliding Window (Q35, 50 bp)”, using MOTHUR according to Schloss et al (2011) [Schloss et al (2011) PLOS One 6: e27310]; (IV) “fastq_maxee” and (V) “fastq_truncqual”, using UPARSE according to Edgar (2013) [Edgar (2013) Nat Methods 10: 996-998]. Average sequence length varied considerably among pipelines, with pipeline I generating shorter reads (220 bp in average) and pipelines IV and V longer reads (370 bp). The number of OTUs obtained in each pipeline also varied significantly. While 22 and 21 OTUs were obtained for pipelines IV and V, respectively, pipelines I-III generated a surprisingly high number of OTUs (199, 317 and 289, respectively). Despite differences in the number of OTUs, the relative abundance of each reference strain did not differ significantly between pipelines. Overall, community structures observed using the UPARSE protocol (pipelines IV and V) were the most consistent with the expected results. These findings show the importance of assessing the performance of different bioinformatic pipelines using artificial communities, in order to reduce the effects of PCR and sequencing errors, which can lead to distorted community structures estimates. [less ▲]

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See detailStrong coupling of Jahn-Teller distortion to oxygen-octahedron rotation and functional properties in epitaxially strained orthorhombic LaMnO3
Lee, Jun Hee; Delaney, Kris; Bousquet, Eric ULg et al

in Physical Review. B, Condensed Matter and Materials Physics (2013), 88

First-principles calculations reveal a large cooperative coupling of Jahn-Teller (JT) distortion to oxygenoctahedron rotations in perovskite LaMnO3. The combination of the two distortions is responsible ... [more ▼]

First-principles calculations reveal a large cooperative coupling of Jahn-Teller (JT) distortion to oxygenoctahedron rotations in perovskite LaMnO3. The combination of the two distortions is responsible for stabilizing the strongly orthorhombic A-AFM insulating (I ) eP bnm ground state relative to a metallic ferromagnetic (FM-M) phase. However, epitaxial strain due to coherent matching to a crystalline substrate can change the relative stability of the two states. In particular, coherent matching to a square-lattice substrate favors the less orthorhombic FM-M phase, with the A-AFM phase stabilized at higher values of tensile epitaxial strain due to its larger volume per formula unit, resulting in a coupled magnetic and metal-insulator transition at a critical strain close to 1%. At the phase boundary, a very large magnetoresistance is expected. Tensile epitaxial strain enhances the JT distortion and opens the band gap in the A-AFM-I c-eP bnm phase, offering the opportunity for band-gap engineering. Compressive epitaxial strain induces a transition within the FM-M phase from the c-eP bnm orientation to the ab-eP bnm orientation with a change in the direction of the magnetic easy axis relative to the substrate, yielding strain-controlled magnetization at the phase boundary. Similar behavior is expected in other JT active Pbnm perovskites. [less ▲]

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See detailOld inks: plant-based inks
Wymeersch, Noémie; Despy, Jessica; Bouchat, Isabelle et al

Poster (2013, November 27)

Thousands of years ago, natural pigments were discovered and they have been used ever since. Indeed, prehistoric people already used them to paint the walls of the caves in which they were living. A ... [more ▼]

Thousands of years ago, natural pigments were discovered and they have been used ever since. Indeed, prehistoric people already used them to paint the walls of the caves in which they were living. A significant example of this is the Cosquer cave (-19,000 to -27,000 years) located near Marseilles (France). Pigments and dyes can be classified into two broad categories: natural pigments and dyes and those called artificial. These categories are then subdivided into five families. The first one of these five families includes the mineral pigments. Among these we can find the clays (yellow ochre, red ochre, green clay, brown clay) and the stones like lapis lazuli (blue) and malachite (green). The second and third families gather the organic dyes and pigments. Those that have vegetal origins like indigo (blue), weld (yellow) and madder (red) compose the family 2 and those that have animal origins like cochineal (red) and kermes dyers (carmine) form the family 3. One family includes pigments and dyes stemming from chemical reactions such as verdigris or red lead (family 4) and the other one is made of the miscellaneous inks such as iron-gall type who are vegetal and mineral one (family 5). All these pigments, although they have been used for centuries, have been replaced by synthetic dyes from the oil industry at the end of the 19th century. Indeed, they have the advantage of reproducibility of the properties unlike natural pigments. But the scarcity of oil causes a renewed interest in natural preparations. In such purpose, our laboratory in conjunction with the Abbey of Villers-la-Ville has decided to study natural derivatives for inks and focuses in particular on the extraction of pigments from plants. [less ▲]

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See detailPerspectives offertes par la culture en association de froment et de pois protéagineux d’hiver
Pierreux, Jérome ULg; Delaplace, Pierre ULg; Roisin, Christian et al

in Autonomie protéique et biométhanisation à la ferme (2013, November 27)

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