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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 detailArsinoe II come dea attraverso le sue epiclesi cultuali
Caneva, Stefano ULg

in Athenaeum : Studii Periodici di Letteratura e Storia (in press), 103(1), 95-122

Dopo una introduzione storica e storiografica sul significato dei culti regali ellenistici, l’intervento esamina alcuni dei nomi divini attribuiti ad Arsinoe II nelle fonti letterarie e documentarie, con ... [more ▼]

Dopo una introduzione storica e storiografica sul significato dei culti regali ellenistici, l’intervento esamina alcuni dei nomi divini attribuiti ad Arsinoe II nelle fonti letterarie e documentarie, con l’eccezione dell’epiclesi esclusiva Philadelphos. Scopo della ricerca è 1) una valutazione delle strategie di inserimento della nuova dea nel pantheon tradizionale; 2) una riflessione sull’autoconsapevolezza degli antichi in relazione alla propria tradizione religiosa, per come essa si manifesta attraverso l’oculata manipolazione di un elemento essenziale nella definizione della divinità, qual è il nome divino. Un’Appendice elenca, in tre tabelle, tutte le denominazioni greche di Arsinoe II (esclusa Philadelphos), fornendo indicazioni sulla fonte, la sua collocazione spaziale e temporale e sulla divinità tradizionale di riferimento. [less ▲]

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See detailPower System Dynamic Simulations using a Parallel Two-level Schur-complement Decomposition
Aristidou, Petros; Lebeau, Simon; Van Cutsem, Thierry ULg

in IEEE Transactions on Power Systems (in press)

As the need for faster power system dynamic simulations increases, it is essential to develop new algorithms that exploit parallel computing to accelerate those simulations. This paper proposes a parallel ... [more ▼]

As the need for faster power system dynamic simulations increases, it is essential to develop new algorithms that exploit parallel computing to accelerate those simulations. This paper proposes a parallel algorithm based on a two-level, Schur complement-based, domain decomposition method. The two-level partitioning provides high parallelization potential (coarse and fine-grained). In addition, due to the Schur-complement approach used to update the sub-domain interface variables, the algorithm exhibits high global convergence rate. Finally, it provides significant numerical and computational acceleration. The algorithm is implemented using the shared-memory parallel programming model, targeting inexpensive multi-core machines. Its performance is reported on a real system as well as on a large test system combining transmission and distribution networks. [less ▲]

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See detailLes théories représentationnelles : panorama introductif
Gauvry, Charlotte ULg

in Dewalque, Arnaud; Gauvry, Charlotte (Eds.) Conscience et représentation. Introduction aux théories représentationnelles de l'esprit (in press)

Introduction au volume

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See detailThe impact of dissolved organic carbon and bacterial respiration on pCO2 in experimental sea ice
Zhou, Jiayun; Kotovitch, Marie ULg; Kaartokallio, H. et al

in Progress in Oceanography (in press)

Previous observations have shown that the partial pressure of carbon dioxide (pCO2) in sea ice brines is generally higher in Arctic sea ice compared to those from the Antarctic sea ice, especially in ... [more ▼]

Previous observations have shown that the partial pressure of carbon dioxide (pCO2) in sea ice brines is generally higher in Arctic sea ice compared to those from the Antarctic sea ice, especially in winter and early spring. We hypothesized that these differences result from the higher dissolved organic carbon (DOC) content in Arctic seawater: Higher concentrations of DOC in seawater would be reflected in a greater DOC incorporation into sea ice, enhancing bacterial respiration, which in turn would increase the pCO2 in the ice. To verify this hypothesis, we performed an experiment using two series of mesocosms: one was filled with seawater (SW) and the other one with seawater with an addition of filtered humic-rich river water (SWR). The addition of river water increased the DOC concentration of the water from a median of 142 µmol L-1 in SW to 249 µmol L-1 in SWR. Sea ice was grown in these mesocosms under the same physical conditions over 19 days. Microalgae and protists were absent, and only bacterial activity has been detected. We measured the DOC concentration, bacterial respiration, total alkalinity and pCO2 in sea ice and the underlying seawater, and we calculated the changes in dissolved inorganic carbon (DIC) in both media. We found that bacterial respiration in ice was higher in SWR: median bacterial respiration was 25 nmol C L-1 h-1 compared to 10 nmol C L-1 h-1 in SW. pCO2 in ice was also higher in SWR with a median of 430 ppm compared to 356 ppm in SW. However, the differences in pCO2 were larger within the ice interiors than at the surfaces or the bottom layers of the ice, where exchanges at the air-ice and ice-water interfaces might have reduced the differences. In addition, we used a model to simulate the differences of pCO2 and DIC based on bacterial respiration. The model simulations support the experimental findings and further suggest that bacterial growth efficiency in the ice might be 0.15-0.2. It is thus credible that the higher pCO2 in Arctic sea ice brines compared with those from the Antarctic sea ice were due to an elevated bacterial respiration, sustained by higher riverine DOC loads. These conclusions should hold for locations and time frames when bacterial activity is relatively dominant compared to algal activity, considering our experimental conditions. [less ▲]

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See detailLes troubles du sommeil chez l'enfant autiste, quel rôle pour le pédopsychiatre?
Abate Ekollo, Joëlle; Malchair, Alain ULg

in Acta Psychiatrica Belgica (in press)

Les troubles du sommeil sont fréquents chez l’enfant et leurs origines sont diverses. Ces troubles ont leur ancrage dans le développement neurophysiologique et psychoaffectif de l’enfant. Les enfants ... [more ▼]

Les troubles du sommeil sont fréquents chez l’enfant et leurs origines sont diverses. Ces troubles ont leur ancrage dans le développement neurophysiologique et psychoaffectif de l’enfant. Les enfants souffrant de troubles du spectre autistique présentent un déficit de sommeil, qui peut durer jusqu’à l’adolescence. Les troubles du spectre autistique comportent des comorbidités multiples, dont des altérations du sommeil. Ils sont importants à caractériser dans cette population, car ils peuvent avoir un impact négatif sur les comportements diurnes. Par ailleurs, ils entrainent souvent des difficultés au sein de la famille. La prise en charge doit avant tout prendre en compte le contexte environnemental afin d’améliorer les habitudes et l’hygiène du sommeil. Des questionnaires ainsi que des agendas de sommeil ont été remplis par des parents afin de démontrer l’importance d’une évaluation et d’une prise en compte des troubles du sommeil chez les enfants souffrant d’autisme en consultation pédopsychiatrique. [less ▲]

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See detailWhere do hybrids come from? Entrepreneurial team heterogeneity as an avenue for the emergence of hybrid organizations
Dufays, Frédéric ULg; Huybrechts, Benjamin ULg

in International Small Business Journal (in press)

This conceptual paper aims to respond to the poorly addressed question of the emergence of hybrid organizations – i.e. organizations that embrace several institutional logics. It does so by developing a ... [more ▼]

This conceptual paper aims to respond to the poorly addressed question of the emergence of hybrid organizations – i.e. organizations that embrace several institutional logics. It does so by developing a model and a set of propositions focusing on the heterogeneity of the entrepreneurial team as a possible driver for hybridity throughout the entrepreneurial process and up to the emergence of a hybrid organization. As contributions to the literatures on (collective) entrepreneurship, imprinting and hybrid organizations, we advance several avenues and conditions under which the heterogeneity of the entrepreneurial team may imprint the entrepreneurial process and lead to the creation of hybrid organizations. Our propositions connect the individual, team and organizational levels and thus advance our understanding of how institutional logics can be combined across different levels of analysis and throughout the stages of an entrepreneurial process. [less ▲]

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See detailDieux des Grecs - Dieux des Romains. Panthéons en dialogue à travers l'histoire et l'historiographie
Bonnet, Corinne; Pirenne-Delforge, Vinciane ULg; Pironti, Gabriella

Book published by Institut historique belge de Rome (in press)

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See detailUn type picard par-delà les frontières : le <nom jeté>
Baiwir, Esther ULg

in Dialectes de Wallonie (in press), 36

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See detailCompte rendu de D. van Mal-Maeder, A. Burnier, L. Núñez (éds.): Jeux de voix. Énonciation, intertextualité et intentionnalité dans la littérature antique
Macedo, Gabriel ULg

in Antiquité Classique : Revue Interuniversitaire d'Etudes Classiques (in press)

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See detailL'aménagement transsexuel comme solution à l'adolescence
BURDOT, Frédéric ULg; Malchair, Alain ULg

in Revue Enfance et Adolescence (in press)

L’aménagement transsexuel comme solution à l’adolescence La transsexualité est souvent banalisée par les médias, séduits par l’idée facile à vendre d’une âme sexuée, donc du drame de la possible ... [more ▼]

L’aménagement transsexuel comme solution à l’adolescence La transsexualité est souvent banalisée par les médias, séduits par l’idée facile à vendre d’une âme sexuée, donc du drame de la possible inadéquation entre le sexe psychique et le sexe corporel. L’observation clinique rigoureuse de son élaboration plaide cependant pour une architecture complexe, résultant d’une dynamique subtile entre le psychisme, l’histoire et l’environnement. En effet, dans l’analyse d’un cas clinique, nous constatons que, face au risque de l’effondrement identitaire d’une structure fragile le Moi tente de se renforcer par l’organisation de mécanismes de défense qui élabore une nouvelle identité étayée sur un physique transité vers l’autre sexe. Si l’on analyse les interactions précoces sous l’angle de la formation de l’identité sexuelle, le noyau « genré » du Moi peut subir une double attaque, par manque d’identification au même et par attaque mortifère du différent. Le Moi se trouve ainsi délié et persécuté par des objets partiels ou peu introjectés. A l’adolescence, moment potentiellement traumatique de la sexuation, le jeune se trouve confronté à l’interrogation sur son identité sexuelle, et lorsque le noyau « genré » s’est précisément trouvé fragilisé, l’angoisse surgit, avec le risque d’une bascule psychotique. Dans ces cas extrêmes, la recherche d’une nouvelle enveloppe, remodelage de la peau, permet de contenir l’éclosion du courant psychotique grâce à la disponibilité permanente de l’incorporation du différent, identification certes coûteuse en ressources mais peut-être, à même d’éviter l’effondrement narcissique complet. [less ▲]

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See detailOption Replication and the Performance of a Market Timer
Hübner, Georges ULg

in Studies in Economics & Finance (in press)

The Treynor and Mazuy framework is a widely used return-based model of market timing. However, existing corrections to the regression intercept can be manipulated through derivatives trading. We propose ... [more ▼]

The Treynor and Mazuy framework is a widely used return-based model of market timing. However, existing corrections to the regression intercept can be manipulated through derivatives trading. We propose an adjustment based on Merton's option replication approach. The linear and quadratic coefficients of the regression are exploited to assess the cost of the replicating option that yields similar convexity for a passive portfolio. A similar reasoning applies for various timing patterns and in multi-factor models. The proposed framework induces a potential rebalancing risk and involves the delicate issue of choosing the cheapest option. We show that these issues can be overcome for reasonable tolerance levels. [less ▲]

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See detailWeak magnetic field, solid-envelope rotation, and wave-induced N-enrichment in the SPB star zeta Cassiopeiae
Briquet, Maryline ULg; Neiner, C.; Petit, P. et al

in Astronomy and Astrophysics (in press)

Aims. The main-sequence B-type star zeta Cassiopeiae is known as a N-rich star with a magnetic field discovered with the Musicos spectropolarimeter. We model the magnetic field of the star by means of 82 ... [more ▼]

Aims. The main-sequence B-type star zeta Cassiopeiae is known as a N-rich star with a magnetic field discovered with the Musicos spectropolarimeter. We model the magnetic field of the star by means of 82 new spectropolarimetric observations of higher precision to investigate the field strength, topology, and effect. Methods. We gathered data with the Narval spectropolarimeter installed at Télescope Bernard Lyot (TBL; Pic du Midi, France) and applied the least-squares deconvolution technique to measure the circular polarisation of the light emitted from zeta Cas. We used a dipole oblique rotator model to determine the field configuration by fitting the longitudinal field measurements and by synthesizing the measured Stokes V profiles. We also made use of the Zeeman-Doppler imaging technique to map the stellar surface and to deduce the difference in rotation rate between the pole and equator. Results. zeta Cas exhibits a polar field strength B_pol of 100-150 G, which is the weakest polar field observed so far in a massive main-sequence star. Surface differential rotation is ruled out by our observations and the field of zeta Cas is strong enough to enforce rigid internal rotation in the radiative zone according to theory. Thus, the star rotates as a solid body in the envelope. Conclusions. We therefore exclude rotationally-induced mixing as the cause of the surface N-enrichment. We discuss that the transport of chemicals from the core to the surface by internal gravity waves is the most plausible explanation for the nitrogen overabundance at the surface of zeta Cas. [less ▲]

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See detailL'atlas à l'épreuve de l'image en mouvement (Warburg, Farocki, Didi-Huberman)
Hagelstein, Maud ULg; Hamers, Jérémy ULg

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

Partant des travaux récents de Georges Didi-Huberman sur l’atlas d’images (A. Warburg) comme outil et support d’une nouvelle heuristique du montage, ce texte confronte l’installation Histoires de fantômes ... [more ▼]

Partant des travaux récents de Georges Didi-Huberman sur l’atlas d’images (A. Warburg) comme outil et support d’une nouvelle heuristique du montage, ce texte confronte l’installation Histoires de fantômes pour grandes personnes (G. Didi-Huberman, A. Gisinger, 2012), composée pour partie d’images en mouvement, à la pensée de la table warburgienne comme lieu d’une perpétuelle reconfiguration et d’une nouvelle lisibilité du monde. Se pourrait-il en effet qu’une image en mouvement, prise d’ordinaire dans un continuum clos, se dote, à travers le montage, des mêmes potentialités critiques – c’est-à-dire d’un même pouvoir inquiétant – que l’image fixe offerte au déambulateur de l’atlas ? [less ▲]

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See detailMontage et résistance du réel chez S. Kracauer: Photographie, cinéma, texte.
Hagelstein, Maud ULg; Hamers, Jérémy ULg

in Bulletin d'Analyse Phénoménologique (in press)

Partant de quelques textes dans lesquels S. Kracauer traite du rapport entre montage et réel, cet article tente de préciser et de problématiser l’ambivalence de Kracauer à l’égard de l’outil « montage » ... [more ▼]

Partant de quelques textes dans lesquels S. Kracauer traite du rapport entre montage et réel, cet article tente de préciser et de problématiser l’ambivalence de Kracauer à l’égard de l’outil « montage », notamment dans le champ cinématographique, en ouvrant la réflexion par cette double question : comment définir un « mauvais usage » du montage et, à l’opposé, comment peuvent se mettre en place les conditions d’un « bon usage » du montage selon Kracauer ? Pour y répondre, les auteurs identifient d'abord, dans l’œuvre de Kracauer, les éléments explicites et implicites (montage textuel) qui permettent de saisir au plus près ce que serait, selon le philosophe et sociologue, le principe de réalité. Ensuite, une œuvre photographique, contemporaine des quelques textes évoqués, Menschen des 20. Jahrhunderts d’August Sander, permet de mieux circonscrire les possibles concrétisations de cette pensée en la mettant à l’épreuve d’une réalisation en images et en montage. [less ▲]

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See detail« Observation relative au poème Un Coup de Dés jamais n’abolira le Hasard par Stéphane Mallarmé » : une préface d’un nouveau genre ?
Durand, Pascal ULg

in Björn-Olav, Dozo; Saint-Amand, Denis (Eds.) Jeux et enjeux de la préface (in press)

L’« Observation relative au poème UN COUP DE DÉS JAMAIS N’ABOLIRA LE HASARD », rédigée expressément à la demande de la rédaction de la revue Cosmopolis qui en avait procuré l’édition originale sous une ... [more ▼]

L’« Observation relative au poème UN COUP DE DÉS JAMAIS N’ABOLIRA LE HASARD », rédigée expressément à la demande de la rédaction de la revue Cosmopolis qui en avait procuré l’édition originale sous une première forme, est depuis lors, assez improprement, considérée et lue comme une « préface » au Coup de dés dans sa version définitive. Émanant d’un poète ayant marqué plus d’une fois la vive défiance que lui inspirait le geste de la préface, elle doit plutôt être lue, tout d’abord, comme un texte de circonstance imposé par des contingences éditoriales et comme un commentaire visant à assurer la lisibilité d’un texte monstre en le rabattant sur des codes reçus. Examinée sous l’angle de sa construction et de son dispositif d’énonciation, cette « Observation » tient sans doute moins, en outre, d’une préface apportée après coup à un « poème » que d’un manifeste esthétique faisant « observer » et se lever, à l’horizon du texte, l’émergence d’un genre poétique sans précédent. [less ▲]

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See detailRepetitive Genres — Spec. issue of Volume ! La revue des musiques populaires
Levaux, Christophe ULg; Pirenne, Christophe ULg

in Volume ! La revue des musiques populaires (in press)

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See detailQuantification of anthropogenic effects in the landscape of Lubumbashi
Andre, Marie ULg; Vranken, Isabelle ULg; Boisson, Sylvain ULg et al

in Mahy, Grégory; Colinet, Gilles; Bogaert, Jan (Eds.) Anthropisation au Katanga (in press)

In order to understand the dynamic of the (sub)urbanisation and so, to quantify the anthropogenic effects of the rapid growth of tropical cities, it is crucial to find and apply valuable methods. In this ... [more ▼]

In order to understand the dynamic of the (sub)urbanisation and so, to quantify the anthropogenic effects of the rapid growth of tropical cities, it is crucial to find and apply valuable methods. In this contribution, the transferability of the Rüdisser et al. (2012) «Distance to Nature» hemeroby assessment method to the landscape surrounding the city of Lubumbashi (DRC) is evaluated. That methodology has the advantage of taking structural connectivity into account by computing the distance to natural habitats. As it had never been applied to an African city before, some adjustments (fitting of the local land uses types into the hemeroby levels designed to Austria) and amendments (suppression of the final classification into hemeroby level simplification) are proposed. Moreover, an analysis of the decanal (2002-2013) hemeroby dynamics is presented. Results suggest that the Distance to Nature methodology is transferable but requires good field knowledge to define reference habitats and identify them in the Landsat classified images. There was a dramatic decrease of the «natural» and «near-natural» levels in the study extent during the studied period. In addition, 32% of the land underwent anthropisation increase, mostly around cities and following a ribbon development. [less ▲]

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See detailThe scribal repertoire of Amennakhte son of Ipuy: Describing variation across Late Egyptian registers
Polis, Stéphane ULg

in Cromwell, Jennifer; Grossman, Eitan (Eds.) Beyond Free Variation: Scribal Repertoires from Old Kingdom to Early Islamic Egypt (in press)

The aim of this chapter is to investigate diaphasic variation in the texts written by the Deir el-Medina scribe Amennakhte son of Ipuy in New Kingdom Egypt (ca. 1150 BCE) by analysing the graphemic and ... [more ▼]

The aim of this chapter is to investigate diaphasic variation in the texts written by the Deir el-Medina scribe Amennakhte son of Ipuy in New Kingdom Egypt (ca. 1150 BCE) by analysing the graphemic and linguistic features of the registers used by this individual when writing texts belonging to different genres. The registers are conceived here as selections operating within the scribal repertoire. At an empirical level, this study is intended as a first step towards a comprehensive description of the types of linguistic variation found within the written production of the Deir el-Medina community in New Kingdom Egypt (ca. 1500–1050 BCE). At a more methodological level, as a case study testing the applicability of some historical sociolinguistic methods in the field of Ancient Egyptian, which could ultimately result in refining our approach to its diachrony. [less ▲]

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See detailVocabulaire des musiques latino-américaines
Pirenne, Christophe ULg; Antouñes, G.; Leymarie, I.

Book published by Minerve (in press)

L'immense espace géographique qui va de la Terre de Feu au Sud du Texas et des côtes du Chili aux Petites Antilles fut le théâtre d'une histoire marquée par d’incessants mouvements migratoires qui ... [more ▼]

L'immense espace géographique qui va de la Terre de Feu au Sud du Texas et des côtes du Chili aux Petites Antilles fut le théâtre d'une histoire marquée par d’incessants mouvements migratoires qui débutèrent au XVIe siècle avec la colonisation. La diversité et l’ampleur de ces flux d'hommes de toutes races, de toutes provenances et de toutes croyances ont été à l'origine de phénomènes d'acculturation complexes et variés. Les musiques indigènes, européennes et africaines ont été réinterprétées, recréées pour aboutir à des formes inédites variant selon les régions ou le degré d’influence de chacune des sources. Ce vocabulaire est destiné à donner un aperçu de cette immense richesse et à éclairer le public francophone sur ces traditions musicales qui, pour certaines, se sont largement diffusées. [less ▲]

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