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See detailAsymptotic properties of free monoid morphisms
Charlier, Emilie ULg; Leroy, Julien ULg; Rigo, Michel ULg

in Linear Algebra & its Applications (2016), 500

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See detailGirls and Math Careers Expectations: Influence of Teacher Support and Motivational Variables
Jaegers, Doriane ULg; Lafontaine, Dominique ULg

Poster (2016, July)

Drawing on the expectancy-value theory, the three basic dimensions of instructional quality and the self-determination theory, this study examines the relation between teacher support, motivational ... [more ▼]

Drawing on the expectancy-value theory, the three basic dimensions of instructional quality and the self-determination theory, this study examines the relation between teacher support, motivational variables, course enrollment and career expectations in the domain of math. Gender differences are also investigated. Teacher support is seen as the fulfilment of the need of relatedness which is defined by the affective and academic quality of the teacher-student relationship. [less ▲]

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See detailL'épopée Planet Nine. Doit-on réécrire les manuels scolaires d'astronomie?
Stiepen, Arnaud ULg

Article for general public (2016)

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See detailSustainability of Rural Systems: Balancing Heritage and Innovation
Schmitz, Serge ULg; Dubois, Charline ULg; Cawley, Mary et al

Book published by Atelier des Presses (2016)

With the discussion of six themes - New technologies and the new rural ways of life, Agronomic innovations and their social and environmental impacts, From ecosystem services to agroservices, Energy ... [more ▼]

With the discussion of six themes - New technologies and the new rural ways of life, Agronomic innovations and their social and environmental impacts, From ecosystem services to agroservices, Energy issues in rural areas, Multifunctional forests and the countryside, Tourism and recreation - the conference analyses how to balance cultural and natural heritage and innovation with special reference to the ecological and social dimensions. [less ▲]

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See detailIsolation and Identification of Steroid and Flavonoid Glycosides from the Flowers of Allium gramineum
Mskhiladze, Lasha; Chincharadze, David; St-Gelais, Alexis et al

in International Journal of Pharmaceutical Sciences and Drug Research (2016), 8(4), 240-243

The isolation and identification of β-sitosterol 3-O-β-glucopyranoside, quercetin 3-O-β-glucopyranoside, isorhamnetin 3,4'-di-O-β-glucopyranosideand isorhamnetin 3,7-di-O-β-glucopyranosidefrom the flowers ... [more ▼]

The isolation and identification of β-sitosterol 3-O-β-glucopyranoside, quercetin 3-O-β-glucopyranoside, isorhamnetin 3,4'-di-O-β-glucopyranosideand isorhamnetin 3,7-di-O-β-glucopyranosidefrom the flowers of Allium gramineumthat growsin Georgia.The structures of isolated compounds havebeen determined by 1H and 13C nuclear magnetic resonance (NMR) Isolation and Identification of Steroid and Flavonoid Glycosides from the Flowers of Allium gramineum. Available from: https://www.researchgate.net/publication/305851744_Isolation_and_Identification_of_Steroid_and_Flavonoid_Glycosides_from_the_Flowers_of_Allium_gramineum [accessed Aug 5, 2016]. [less ▲]

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See detailThe different origins of high- and low-ionization broad emission lines revealed by gravitational microlensing in the Einstein cross
Braibant, Lorraine ULg; Hutsemekers, Damien ULg; Sluse, Dominique ULg et al

in Astronomy & Astrophysics (2016), 592

We investigate the kinematics and ionization structure of the broad emission line region of the gravitationally lensed quasar QSO2237+0305 (the Einstein cross) using differential microlensing in the high ... [more ▼]

We investigate the kinematics and ionization structure of the broad emission line region of the gravitationally lensed quasar QSO2237+0305 (the Einstein cross) using differential microlensing in the high- and low-ionization broad emission lines. We combine visible and near-infrared spectra of the four images of the lensed quasar and detect a large-amplitude microlensing effect distorting the high-ionization CIV and low-ionization Hα line profiles in image A. While microlensing only magnifies the red wing of the Balmer line, it symmetrically magnifies the wings of the CIV emission line. Given that the same microlensing pattern magnifies both the high- and low-ionization broad emission line regions, these dissimilar distortions of the line profiles suggest that the high- and low-ionization regions are governed by different kinematics. Since this quasar is likely viewed at intermediate inclination, we argue that the differential magnification of the blue and red wings of Hα favors a flattened, virialized, low-ionization region whereas the symmetric microlensing effect measured in CIV can be reproduced by an emission line formed in a polar wind, without the need of fine-tuned caustic configurations. [less ▲]

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See detailLe sexe ratio chez les bovins : facteurs de variation
Hanzen, Christian ULg; Chastant-Maillard, Sylvie; Rao, Anne-Sophie ULg et al

in Point Vétérinaire (Le) : Expert Rural (2016), 367

Le sexe ratio secondaire, défini comme la proportion de mâles à la naissance, est de 52% chez les bovins, avec des variations selon les populations étudiées de 46 à 57%. Il est plus élevé lors des ... [more ▼]

Le sexe ratio secondaire, défini comme la proportion de mâles à la naissance, est de 52% chez les bovins, avec des variations selon les populations étudiées de 46 à 57%. Il est plus élevé lors des premières étapes du développement embryonnaire, et les conceptus mâles meurent proportionnellement plus au cours de la gestation que les conceptus femelles. Les facteurs de variation potentiels sont nombreux, mais peu d’effets sont unanimement observés. L’effet de la parité ou du statut social de la vache ne sont pas clairement démontrés. Les ovulations sur l’ovaire droit donneraient naissance à une plus forte proportion de mâles ; le rôle du taureau est probablement limité et la répétabilité du sexe du veau d’une gestation à l’autre est faible. Le moment de l’insémination par rapport à l’ovulation ne semble pas avoir d’influence alors qu’il aurait pu constituer un moyen de maîtrise assez simple à mettre en œuvre. [less ▲]

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See detailIn search for a definition of sanctions in the context of strategic trade control
Colussi, Ilaria Anna ULg

in Paile, Sylvain; Michel, Quentin; Jankowitsch-Prevor, Odette (Eds.) Controlling the trade of strategic goods SANCTIONS AND PENALTIES (2016)

One of the basic rules in trade law is the freedom of trade. However, such rule encounters some limitations, derogations and exceptions when the object of trade is constituted by strategic and sensitive ... [more ▼]

One of the basic rules in trade law is the freedom of trade. However, such rule encounters some limitations, derogations and exceptions when the object of trade is constituted by strategic and sensitive items. The concept of “strategic trade” is one of the most ambiguous ones, and there is not a common definition of it. Even if the General Agreements on Tariffs and Trade (GATT) does not offer such an explanation, its Article XXI can be construed as referring to strategic trade, as much as it states that the provisions of GATT (grounded on free trade) need not apply in cases where “essential security interests” are involved. The concept of “essential security interests” is also vague, as it is left upon the individual parties to the GATT to decide what it means. Despite such ‘slippery slope’ in the definition of terms, it results, however, that strategic trade is linked to norms and measures that aim at controlling trade, in order to ensure the protection of non economic needs, such as national security, public morals, public order, etc. This area finds at the intersection of commercial and foreign policy. For ensuring the protection of non economic interests, it is necessary to introduce measures that provide for controls on all activities conducted by individuals, organizations, and groups regarding goods, equipment, materials, services related to strategic items: these activities shall cover the whole supply chain, including design, development, production, possession, delivery, transport, transit, trans-shipment, financing, brokering, exports, re-exports, transfers and imports. The actors intervening in the draft of rules and controls are mainly the States, and the international and regional organiza- tions; then, important subjects are national licencing authorities and enforcement agencies such as customs, border security, police and armed forces, if needed. The targets of such measures of control could be the States, if the rules at the international or regional level are addressing them, and/or the operators involved in strategic trade. Considering the ways in which States organize such controls, the reality shows that they have introduced control lists, licences and authorisations granted on the basis of conditions and criteria, information-sharing and cooperation between authorities and operators, duties of transparency through reports, records, dec- larations and screenings. Moreover, measures exist that consist of restrictions, bans and penalties providing that consequences in case of violation of strategic trade rules. Therefore, the issue of sanctions is a relevant part of the strategic trade law, and it inserts within that context. The purpose of this contribution is to define what sanctions in strategic trade mean and to systematize them accordingly. In particular, the sanctions are categorized into three groups: A. “supranational sanctions”; B. “implementing sanctions”; C. tertium genus: “unilateral sanctions” and “countermeasures”. [less ▲]

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See detailLa laïcité des Etats et l'affirmation musulmane
Bousetta, Hassan ULg

Article for general public (2016)

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See detailSize and Value Matter But Not the Way You Thought
Lambert, Marie ULg; Hübner, Georges ULg; Fays, Boris ULg

Conference (2016, July)

We propose a simple but fundamental methodological change to Fama and French (1993) factor construction procedure. Consistent with Lambert and Hübner (2013) sequential sorting procedure to classify stocks ... [more ▼]

We propose a simple but fundamental methodological change to Fama and French (1993) factor construction procedure. Consistent with Lambert and Hübner (2013) sequential sorting procedure to classify stocks, our methodology controls ex ante for pricing errors produced by multifactor models. Our size and value factors deliver less specification errors when used to price portfolios, especially regarding low size and high B/M stocks. Furthermore, this alternative framework generates much stronger “turn-of-the-year” size and “through-the-year” book-to-market effects than conventionally documented. The factors also display a slight competitive advantage on the taxonomy of low turnover market anomalies defined by Novy-Marx and Velikov (2015). [less ▲]

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See detailInventaire et typologie des listes grecques et latines de produits pharmaceutiques
Ricciardetto, Antonio ULg

in Derda, Tomasz; Lajtar, Adam; Urbanik, Jakub (Eds.) Proceedings of the XXVIIth International Congress of Papyrology. Warsaw, 29 July - 3 August 2013 (2016, July)

Dans la documentation papyrologique relative aux pratiques médicales de l’Égypte gréco-romaine et byzantine, le genre des listes de produits pharmaceutiques n’a encore jamais fait l’objet, ni d’un ... [more ▼]

Dans la documentation papyrologique relative aux pratiques médicales de l’Égypte gréco-romaine et byzantine, le genre des listes de produits pharmaceutiques n’a encore jamais fait l’objet, ni d’un inventaire, ni d’une étude exhaustifs. Dans le cadre de nos recherches doctorales sur la typologie des papyrus documentaires grecs et latins à caractère médical, c’est cette lacune que l’on se propose de combler, d’une part en cataloguant, au moyen de la fiche Mertens-Pack³ du CEDOPAL, la trentaine de listes de produits pharmaceutiques provenant d’Égypte, écrites en grec sur papyrus et ostracon (IIIe s. av. J.-Chr.-VIIe s. apr. J.-Chr.), auxquelles on ajoutera deux listes latines sur tablettes de bois, provenant du camp romain de Vindolanda (c. 100p), et, d’autre part, en analysant les aspects formels, paléographiques, textuels et contextuels de ces documents médicaux qui peuvent correspondre, soit à un inventaire de droguiste, soit à une commande, soit à une ou plusieurs recettes dont l’état fragmentaire du support a fait disparaître les proportions. On comparera les données obtenues avec d’autres pièces papyrologiques, spécialement les nombreuses prescriptions médicales, ainsi que les comptes, les reçus de paiement ou encore les lettres privées relatives à des demandes de médicaments ou à la livraison de substances pharmaceutiques. [less ▲]

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See detailLe rôle des limites et des risques dans la construction de la relation entre les professionnel-le-s et les familles dans les Centres d’Éducation et d’Accueil des Jeunes Enfants de 0 à 3 ans : le point de vue de puéricultrices
Sharmahd, Nima ULg; Pirard, Florence ULg

Report (2016)

Ce rapport présente les résultats d'une recherche centrée sur le point de vue de professionnelles de la petite enfance sur les relations établies avec les familles dont elles accueillent les enfants dans ... [more ▼]

Ce rapport présente les résultats d'une recherche centrée sur le point de vue de professionnelles de la petite enfance sur les relations établies avec les familles dont elles accueillent les enfants dans le milieu d'accueil. Il met en évidence une série de tensions entre lesquelles ces professionnelles sont prises: être sûres/ouverture à l'incertitude, être protégées/être reconnues... Il propose une série de pistes de réflexion et d'action qui reconnaissent la complexité d'une activité professionnelle souvent méconnue. [less ▲]

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See detailPassive linearization of nonlinear resonances
Habib, Giuseppe ULg; Grappasonni, Chiara ULg; Kerschen, Gaëtan ULg

in Journal of Applied Physics (2016), 120

The objective of this paper is to demonstrate that the addition of properly-tuned nonlinearities to a nonlinear system can increase the range over which a speci c resonance responds linearly. Speci cally ... [more ▼]

The objective of this paper is to demonstrate that the addition of properly-tuned nonlinearities to a nonlinear system can increase the range over which a speci c resonance responds linearly. Speci cally, we seek to enforce two important properties of linear systems, namely the force-displacement proportionality and the invariance of resonance frequencies. Numerical simulations and experiments are used to validate the theoretical ndings. [less ▲]

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See detailERA-NET ECO-INNOVERA - Fragmentation électrodynamique des matériaux composites à haute valeur ajoutée contenant des substances récupérables - EDF-HVC: Rapport scientifique & technique annuel
Martino, Rémi ULg; Gaydardzhiev, Stoyan ULg

Report (2016)

The EDF-HVC project aims in evaluating the feasibility of electrodynamic fragmentation application to process end-of-life devices such as waste electrical and electronic equipments and secondary resources ... [more ▼]

The EDF-HVC project aims in evaluating the feasibility of electrodynamic fragmentation application to process end-of-life devices such as waste electrical and electronic equipments and secondary resources such as MSW incineration slags, EoL high-end composites, etc. Different target materials will be processed under varying operating parameters and characterized respectively, before and after a selective fragmentation in order to optimize the method and evaluate its economical and environmental perspectives. [less ▲]

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See detailRadiative accidental matter
Da Silva Simoes, Catarina ULg; Aristizabal Sierra, Diego ULg; Wegman Ostrosky, Daniel ULg

in Journal of High Energy Physics [=JHEP] (2016)

Accidental matter models are scenarios where the beyond-the-standard model physics preserves all the standard model accidental and approximate symmetries up to a cutoff scale related with lepton number ... [more ▼]

Accidental matter models are scenarios where the beyond-the-standard model physics preserves all the standard model accidental and approximate symmetries up to a cutoff scale related with lepton number violation. We study such scenarios assuming that the new physics plays an active role in neutrino mass generation, and show that this unavoidably leads to radiatively induced neutrino masses. We systematically classify all possible models and determine their viability by studying electroweak precision data, bigbang nucleosynthesis and electroweak perturbativity, fi nding that the latter places the most stringent constraints on the mass spectra. These results allow the identi fication of minimal radiative accidental matter models for which perturbativity is lost at high scales. We calculate radiative charged-lepton flavor violating processes in these setups, and show that mu -> e gamma has a rate well within MEG sensitivity provided the lepton-number violating scale is at or below 5 105 GeV, a value (naturally) assured by the radiative suppression mechanism. Sizeable tau -> mu gamma branching fractions within SuperKEKB sensitivity are possible for lower lepton-number breaking scales. We thus point out that these scenarios can be tested not only in direct searches but also in lepton flavor-violating experiments. [less ▲]

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See detailHeavy methane to explain the unexplained recent methane growth ?
Bader, Whitney ULg; Strong, Kim; Walker, Kaley

Poster (2016, July)

Methane (CH4) is the second most important greenhouse gas emitted by human activities in the Earth’s atmosphere. Although it is roughly 200 times less abundant than carbon dioxide, it is a 28 times more ... [more ▼]

Methane (CH4) is the second most important greenhouse gas emitted by human activities in the Earth’s atmosphere. Although it is roughly 200 times less abundant than carbon dioxide, it is a 28 times more potent greenhouse gas. Approximately one fifth of the changes in the Earth’s balance energy caused by human-linked greenhouse gases since the beginning of industrialization (~1750) is due to methane. Methane is emitted by both natural sources and human activities. Indeed, methane can be emitted to the atmosphere through coal mining, oil and gas exploitation, rice cultures, domestic ruminant animals, biomass burning, waste management, wetlands, termites, methane hydrates and ocean. In the atmosphere, methane is mainly destroyed by the radical hydroxyl, also called the detergent of the atmosphere, and therefore plays a major role on the oxidizing capacity of the atmosphere. Since the beginning of the industrialization, atmospheric methane concentrations have increased by 260% to reach 1824 pbb in 2013. From the 1980s until the beginning of the 1990s, atmospheric methane was significantly on the rise, then stabilized during 1999-2006 to rise again afterwards. To this day, the source or sink responsible of this latter increase remains unexplained. Through each emission process, heavy molecules of methane (with one additional neutron either on a carbon or on one hydrogen atom) are emitted along methane (12CH4). The main heavy molecules of methane, called isotopologues (13CH4 and CH3D), are respectively ~110 and ~60 000 times less abundant than methane. Despite their small abundances, they give crucial information on the concentration of methane in the atmosphere and its evolution. Indeed, both isotopologues are emitted with specific emission ratio depending on the emission sources. Determining isotopic ratio of atmospheric methane is therefore a unique tracer of its budget. While the non-monotonous trend of methane is subject of an extensive number of studies, to our knowledge, no study of the isotopic ratio of methane derived from ground-based solar observations has been published to date. Measurements of heavy methane from Fourier Transform InfraRed spectra recorded with state of the art spectrometers installed at Eureka [Arctic, Canada] and Toronto [Ontario, Canada] along with analysis of observations collected by a portable instrument [Portable Atmospheric Research Interferometric Spectrometer for the Infrared, PARIS-IR], installed at Eureka will help fill this gap. Indeed, the produced time series, compared with the corresponding satellite observations (ACE-FTS) products will ease data interpretation and contribute to a global view of the question of isotopologues. [less ▲]

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See detailInternal structures of clusters in driven granular gas
Noirhomme, Martial ULg

Poster (2016, July)

Detailed reference viewed: 8 (2 ULg)