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See detailCours sur l'enseignement et l'apprentissage de l'analyse
Schneider-Gilot, Marguerite ULg

in Actes de la 18e école d'été de didactique des mathématiques (in press)

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See detailBACTERIA MAY CONTRIBUTE TO DISTANT SPECIES RECOGNITION IN ANT-APHID MUTUALISTIC RELATIONSHIPS
Fischer, Christophe ULg; Detrain, Claire; Thonart, Philippe ULg et al

in Insect Science (in press)

Mutualistic interactions between ant and aphid species have been the subject of considerable historical and contemporary investigations, the primary benefits being cleaning and protection for the aphids ... [more ▼]

Mutualistic interactions between ant and aphid species have been the subject of considerable historical and contemporary investigations, the primary benefits being cleaning and protection for the aphids and carbohydrate-rich honeydew for the ants. Questions remained, however, as to the volatile semiochemical factor influencing this relationship. A recent study highlighted the role of bacterial honeydew volatile compounds in ant attraction. Here, ant’s ability to distantly discriminate two aphid species was investigated based on bacterial honeydew semiochemicals emissions using a two-way olfactometer. Both the mutualistic black bean aphid (Aphis fabae L.) and the non-myrmecophilous pea aphid (Acyrthosiphon pisum Harris) were found to be attractive for the black garden ant (Lasius niger L.). The level of attraction was similar in both assays (control versus one of the aphid species). However, when given a choice between these two aphid species, ants showed a significant preference for Aphis fabae. Honeydew volatiles, mostly from bacterial origins, are known to be a key element in ant attraction. Using the same olfactometry protocol, the relative attractiveness of volatiles emitted by honeydews collected from each aphid species and by bacteria isolated from each honeydew was in investigated. Again, ants significantly preferred volatiles released by Aphis fabae honeydew and bacteria. This information suggests that microbial honeydew volatiles enable ants to distantly discriminate aphid species. These results emphasize the importance of investigating the presence and potential effects of microbes in insect symbioses. [less ▲]

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See detailBioclimatism in Architecture : an evolutionary perspective
Nguyen, Anh Tuan; Reiter, Sigrid ULg

in International Journal of Design and Nature and Ecodynamics (in press)

Fundamentals of vernacular architecture have been used in bioclimatic architecture which has gradually become the inspiration of various movements in contemporary architecture. The study points out that ... [more ▼]

Fundamentals of vernacular architecture have been used in bioclimatic architecture which has gradually become the inspiration of various movements in contemporary architecture. The study points out that the development of bioclimatism in architecture has followed the pattern of a natural evolutionary process in which “natural selection” is likely motivated by several factors, including resources and environment problems, and driven by different mechanisms including novel building design concepts and methods, new standards and codes, discoveries in building science and construction costs. This study is an effort aimed to clarify the evolution process of the bioclimatic approach in architecture over time and its influences on contemporary movements in architecture. The paper shows also that the evolutionary theory generated new scientific tools able to improve building design thanks to simulation-based optimization methods applied to building performances. Finally, this study investigates new motivations in the era of climate change whose effects are expected to introduce more challenges as well as more trends towards a sustainable built environment through the new concept of Eco-adaptive architecture. [less ▲]

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See detailDesign and modelisation of a straylight facility for space optical instrument
Mazy, Emmanuel ULg; Stockman, Yvan ULg; Hellin, Marie-Laure ULg

in SPIE (Ed.) 2012 Optical system Design (in press)

In the framework of instrument calibration, straylight issues are a critical aspect that can deteriorate the optical performances of instrument. To cope with this, a new facility is designed dedicated for ... [more ▼]

In the framework of instrument calibration, straylight issues are a critical aspect that can deteriorate the optical performances of instrument. To cope with this, a new facility is designed dedicated for in-field and far field straylight characterization: up to 10-8 for in-field and up to 10-10 for far field straylight in the visible to NIR spectral ranges. Moreover, from previous straylight test performed at CSL, vacuum conditions are needed for reaching the 10-10 rejection requirement mainly to avoid air/dust diffusion. The major constrains are to design a straylight facility either for in-field and out-field straylight measurements. That requires high dynamic range at source level and a high radiance point source allowing small diverging collimated beam. Moreover, the straylight facility has to be implemented into a limited envelope and has to be built with vacuum compatible materials and black coating. As checking the facility performance requires an instrument better than the facility itself, that is no easy to find, so that the performances have been estimated through a modelisation into a non sequential optical software. This modelisation is based on CAD importation of mechanical design, on BRDF characteristics of black coating and on statistical averaging of ray tracing at instrument entrance. [less ▲]

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See detailLe débat sur la véritable nature du corail
Vandersmissen, Jan ULg

in Actes du IXe Congrès de l’Association des Cercles francophones d’Histoire et d’Archéologie de Belgique (in press)

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See detailBrain Computer Interfaces and diagnosis
Chatelle, Camille ULg; LAUREYS, Steven ULg; Noirhomme, Quentin ULg

in Grübler, Gerd; Hildt, Elisabeth (Eds.) Brain-Computer-Interfaces in their ethical, social and cultural contexts (in press)

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See detail« Le rôle des facilitateurs dans la diffusion de normes d’emploi : le cas d’un bureau de chômage belge ».
Beuker, Laura ULg; Orianne, Jean-François ULg

in Meilland, Christelle; Sarfati, François (Eds.) Accompagner vers l'emploi. Quand les dispositifs se mettent en action (in press)

En 2004 a eu lieu une importante réforme concernant la politique d’activation en Belgique : le Plan d’accompagnement des chômeurs (PAC) qui prévoit le renforcement de l’accompagnement des chômeurs ... [more ▼]

En 2004 a eu lieu une importante réforme concernant la politique d’activation en Belgique : le Plan d’accompagnement des chômeurs (PAC) qui prévoit le renforcement de l’accompagnement des chômeurs, effectué par les Services publics de l’emploi (SPE), la mise en place de la procédure d’activation du comportement de recherche d’emploi, effectuée par l’Office national de l’emploi (Onem), ainsi que l’échange systématique de données entre les SPE régionaux et le Fédéral. Désormais, des agents, dénommés facilitateurs, sont spécifiquement chargés de l’évaluation du comportement de recherche d’emploi des chômeurs. Lors des entretiens d’évaluation, l’indemnisation des chômeurs est en jeu. Si la procédure d’évaluation est clairement définie par un cadre règlementaire, la décision, quant à elle, résulte d’un travail d’interprétation qu’effectue l’agent en situation de face à face avec le demandeur d’emploi (DE). Nous tenterons de décrire l’activité de jugement des facilitateurs et montrerons que la décision de ces derniers n’est ni totalement arbitraire, ni totalement déterminée par la réglementation : elle résulte de l’interaction avec le chômeur et de la mobilisation d’une multitude d’appuis conventionnels de l’action (Dodier, 1993). Nous montrerons que ces agents sont aussi des « pourvoyeurs » de normes institutionnelles (Benarrosh, 2006). [less ▲]

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See detailRevealed preference tests of collectively rational consumption behavior: formulations and algorithms
Talla Nobibon, Fabrice; Cherchye, Laurens; Crama, Yves ULg et al

in Operations Research (in press)

This paper focuses on revealed preference tests of the collective model of household consumption. We start by showing that the decision problems corresponding to testing collective rationality are {\sc np ... [more ▼]

This paper focuses on revealed preference tests of the collective model of household consumption. We start by showing that the decision problems corresponding to testing collective rationality are {\sc np}-complete. This makes the application of these tests problematic for (increasingly available) large(r) scale data sets. We then present two approaches to overcome this negative result. First, we introduce exact algorithms based on mixed-integer programming ({\sc mip}) formulations of the collective rationality tests, which can be usefully applied to medium sized data sets. Next, we propose simulated annealing heuristics, which allow for efficient testing of the collective model in the case of large data sets. We illustrate our methods by a number of computational experiments based on Dutch labor supply data. [less ▲]

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See detailLe développement de la compétence scripturale en FLS/FLE à l'université à l'aide des TIC : perceptions, pratiques et pistes d'exploitation
Dezutter, Olivier; Bleys, Françoise; Poirier, Vicky et al

in Les Centres de langues et la mise en œuvre des politiques linguistiques dans l’enseignement supérieur : Enseignement – Recherche - Mobilités (in press)

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See detailMinor compounds and oxidative stability of mono-varietal virgin olive oils produced in eastern of Morocco
Mansouri, Farid; Benmoumen, Abdessamad; Richard, Gaetan ULg et al

in Food Chemistry (in press)

The aim of this study is to characterize monovarietal virgin olive oils (VOOs) of new high-density plantings system of three cultivars (Arbequina, Arbosana and Koroneiki) which have been recently ... [more ▼]

The aim of this study is to characterize monovarietal virgin olive oils (VOOs) of new high-density plantings system of three cultivars (Arbequina, Arbosana and Koroneiki) which have been recently introduced in the eastern mediterranean region of Morocco. In this study, we have also conducted comparison between those monovarietal VOOs and olive oil of the local olive cultivar Picholine marocaine. Monovarietal VOOs characterization has been carried out by analysing several parameters, including quality index and olive oil stability to oxidation. Significant differences between the analysed olive oils were highlighted. They depend on cultivars and technological conditions of processing. We have noticed that Koroneiki olive oil have higher content of phenols (459.48 mg kg-1) and have the best value of oxidative stability (93.16 h). On the other hand Arbrosana’s VOO has low content of total phenols (260.85 mg kg-1) but it was distinguished by its higher content of alpha-tocopherol (460.07 mg kg-1). In addition, ten phenolic compounds present in virgin olive oils, were identified and quantitatively assessed by HPLC. Hydroxytyrosol, tyrosol, luteoline, pinoresinol and apigenin were the main phenolic compounds in those analyzed monovarietal VOOS. [less ▲]

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See detailO insecabilis unitas ? Augustinisme et théologie politiques
Close, Florence ULg

in Depreux, Philippe; Esders, Stefan (Eds.) La productivité d'une crise: le règne de Louis le Pieux (814-840) et la transformation de l'Empire carolingien / Produktivität einer Krise: Die Regierungszeit Ludwigs des Frommen (814-840) und die Transformation des karolingischen Imperium » (in press)

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See detailLe synode ecclésiastique de Francfort (794). Un concile bien inspiré?
Close, Florence ULg

in Cuchet, Guillaume; Mériaux, Charles (Eds.) La dramatique conciliaire (in press)

Le concile de Francfort n’a pas seulement contribué à la construction de l’idéologie impériale carolingienne. Il fut aussi le lieu d’une importante réflexion conciliaire et théologique, stimulée par la ... [more ▼]

Le concile de Francfort n’a pas seulement contribué à la construction de l’idéologie impériale carolingienne. Il fut aussi le lieu d’une importante réflexion conciliaire et théologique, stimulée par la propagation de la doctrine adoptianiste des Espagnols et par la diffusion des actes du concile de Nicée II en Francia. L’important corpus documentaire qui a été conservé offre une possibilité exceptionnelle pour l’époque de connaître le concile de l’intérieur, de percevoir les sentiments et les attentes des participants, de comprendre les enjeux ecclésiologiques et théologiques des questions mises à l’ordre du jour. Cet article propose une esquisse d’évaluation de l’intensité dramatique de ce synode et de l’effective portée des débats qui s’y sont joués. [less ▲]

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See detailProcédures d'attribution
Durviaux, Ann-Lawrence ULg

in Durviaux, Ann-Lawrence (Ed.) La nouvelle directive "secteurs classiques" sur les marchés publics (in press)

Analyse de la directive 2014/24/UE

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See detailInsecticidal activity of Lavandula angustifolia Mill. against Acyrtosiphum pisum
Attia, Sabrine; Lognay, Georges ULg; Heuskin, Stéphanie ULg et al

in journal of entomology and zoology studies (in press)

The essential oil of Lavandula angustifolia was investigated for its biocide activity against Acyrtosiphum pisum by fumigation. The oil was characterised by GC-MS revealing that linalool was the most ... [more ▼]

The essential oil of Lavandula angustifolia was investigated for its biocide activity against Acyrtosiphum pisum by fumigation. The oil was characterised by GC-MS revealing that linalool was the most abundant component (38.57%), followed by linalyl acetate (29.95%), 1,8-cineole (13,66%), camphor (13,13%), -pinene (3,14%) and terpinene-4-ol (1,54%). The Mortality was measured upon treatment with oil concentrations ranging from 5 to 25 µl.l-1 of air. The mortality of aphids increased with oil concentration and LC50 values were determined to be 11.2 µl.l-1 of air. The full mixture was also prepared and toxicity was compared with individual constituents. The results showed that the presence of all constituents were necessary to equal the toxicity of the natural oils L. angustifolia oil can provide valuable pesticide activity with significantly lower LC50 values [less ▲]

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See detailInfluence of the secondary endosymbiont Serratia Symbiotica on the resistance to the parasitism in the aphid Acyrthosiphon pisum
Attia, Sabrine; Foray, Vincent; Louâpre, Philippe et al

in Journal of Entomology and Zoology Studies (in press)

Aphids have an obligate association with the primary symbiont Buchnera aphidicola and is known to affect aphid fitness. Aphids commonly harbour other facultative bacterial endosymbionts and may benefit ... [more ▼]

Aphids have an obligate association with the primary symbiont Buchnera aphidicola and is known to affect aphid fitness. Aphids commonly harbour other facultative bacterial endosymbionts and may benefit from their presence through increased resistance to parasitoids [1]. Present results suggest that the ability of hosts to defend against natural enemies depend not only on the presence of symbionts but also on the host genotype. Aphids represent a complex micro-environment for the parasitoid larvae and both the aphid physiology and endosymbiont influence their survival until mummification. [less ▲]

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See detailSociologie de la communication politique
Devresse, Jenifer ULg

in Communication (in press)

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See detailLa guerre comme jeu dans 'Cartouche' (1931), de Nellie Campobello
Vanden Berghe, Kristine ULg

in McIntosh (Ed.) Écrire la guerre. Écrire le conflit. (in press)

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See detailLe « mot-phrase » dans les conceptions syntaxiques de Lucien Tesnière
Mazziotta, Nicolas ULg; Kahane, Sylvain

in Bulletin de la Société de Linguistique de Paris (in press)

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See detailThird Millennium Pottery from Tell Beydar. Catalogue of the Complete Vessels recovered during the 1992 to 2010 Seasons
Mas, Juliette ULg; Gavagnin, Katia

Book published by Brepols (in press)

This volume presents the complete collection of complete pots and profiles (ca. 1800 vessels) dating to the 3rd millennium BC, recovered during the excavations carried out at Tell Beydar during sixteen ... [more ▼]

This volume presents the complete collection of complete pots and profiles (ca. 1800 vessels) dating to the 3rd millennium BC, recovered during the excavations carried out at Tell Beydar during sixteen seasons (from 1992 to 2010). Tell Beydar, located in the syrian Jezirah region was a second rank urban center during the second part of the 3rd millennium BC. The EJZ 3b city has been widely explored by extensive excavations and offered large assemblages of archaeological material. This monograph offers a clear vision of the material culture of the site and allows us to insert it in the cultural landscape of Upper-Mesopotamia during the 3rd millennium BC. [less ▲]

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