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See detailAnalyzing the Boer-Mulders function within different quark models
Courtoy, Aurore ULg; Scopetta, S.; Vento, V.

in Physical Review. D, Particles, Fields, Gravitation, and Cosmology (2009), 80(7),

A general formalism for the evaluation of time-reversal odd parton distributions is applied here to calculate the Boer-Mulders function. The same formalism when applied to evaluate the Sivers function led ... [more ▼]

A general formalism for the evaluation of time-reversal odd parton distributions is applied here to calculate the Boer-Mulders function. The same formalism when applied to evaluate the Sivers function led to results which fulfill the Burkardt sum rule quite well. The calculation here has been performed for two different models of proton structure: a constituent quark model and the MIT bag model. In the latter case, important differences are found with respect to a previous evaluation in the same framework, a feature already encountered in the calculation of the Sivers function. The results obtained are consistent with the present wisdom, i.e., the contributions for the u and d flavors turn out to have the same sign, following the pattern suggested analyzing the model-independent features of the impact parameter dependent generalized parton distributions. It is therefore confirmed that the present approach is suitable for the analysis of time-reversal odd distribution functions. A critical comparison between the outcomes of the two models, as well as between the results of the calculations for the Sivers and Boer-Mulders functions, is also carried out. © 2009 The American Physical Society. [less ▲]

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See detailOn natural and conformally invariant quantizations
Mathonet, Pierre ULg; Radoux, Fabian ULg

in Journal of the London Mathematical Society (2009), 80(1), 256-272

The concept of conformally equivariant quantization was introduced by Duval, Lecomte and Ovsienko for manifolds endowed with flat conformal structures. They obtained results of existence and uniqueness ... [more ▼]

The concept of conformally equivariant quantization was introduced by Duval, Lecomte and Ovsienko for manifolds endowed with flat conformal structures. They obtained results of existence and uniqueness (up to normalization) of such a quantization procedure. A natural generalization of this concept is to seek for a quantization procedure, over a manifold M, that depends on a pseudo-Riemannian metric, is natural, and is invariant with respect to a conformal change of the metric. The existence of such a procedure was conjectured by P. Lecomte and proved by C. Duval and V. Ovsienko for symbols of degree at most 2 and by S. Loubon Djounga for symbols of degree 3. In two recent papers, we investigated the question of existence of projectively equivariant quantizations using the framework of Cartan connections. Here we will show how the formalism developed in these works adapts in order to deal with the conformally equivariant quantization for symbols of degree at most 3. This will allow us to easily recover earlier results on the subject. We will then show how it can be modified in order to prove the existence of conformally equivariant quantizations for symbols of degree 4. [less ▲]

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See detailMajoron emission in muon and tau decays revisited
Hirsch, M.; Vicente, Avelino ULg; Meyer, J. et al

in Physical Review. D, Particles, Fields, Gravitation, and Cosmology (2009), 79

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See detailL'union entre personnes de même sexe s'exporte-t-elle bien?
Wautelet, Patrick ULg

in Revue du Droit des Etrangers [= RDE] (2009), 151

In this case note, an analysis is offered of a decision by a Luxemburg administrative court regarding the recognition in Luxemburg of a same sex marriage celebrated in Belgium. Looking at the larger ... [more ▼]

In this case note, an analysis is offered of a decision by a Luxemburg administrative court regarding the recognition in Luxemburg of a same sex marriage celebrated in Belgium. Looking at the larger picture, some thoughts are offered on how well same sex marriages celebrated in Belgium fare abroad. [less ▲]

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See detailApprendre à lire, puis lire pour apprendre
Lafontaine, Dominique ULg

in Prof (2009), 4

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See detailL’examen électrophysiologique du nerf thoracique long (nerf de Charles Bell)
WANG, François-Charles ULg; Courtois, Anne-Catherine ULg; TINANT, France ULg

in Lettre du Neurologue (La) : le Courrier du Spécialiste (2009)

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See detailFood resources unconventional use for poultry production in Africa: nutritional values and constraints
Dahouda, M.; Toleba, S. S.; Senou, M. et al

in Annales de Médecine Vétérinaire (2009), 153(1), 5-21

Numerous works are related to the use of unconventional feed resources, and particularly to Mucuna Spp., in poultry diet. This review aims at describing the context of their use, their nutritional values ... [more ▼]

Numerous works are related to the use of unconventional feed resources, and particularly to Mucuna Spp., in poultry diet. This review aims at describing the context of their use, their nutritional values and the constraints related to their upgrading, before considering the effects of the various methods of treatment on the reduction of the toxic substances that they could contain and on their chemical compositions. The methods of treatment are very variable and their standardisation should allow using them in rural area. Those feed could thus constitute an alternative to costly conventional feed usually used in poultry production. [less ▲]

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See detailUse of chips and cassava leaves in finishing guinea (Numida meleagris, L): animal performance, costs of production, Aspect of the carcass and meat quality
Dahouda, M.; Toleba, S. S.; Youssao, A. K. I. et al

in Annales de Médecine Vétérinaire (2009), 153(2), 82-87

The effect of feed containing cassava leafs and peels was assessed on 126 local guinea fowls animal performance, production costs and meat quality over a period of 28 weeks in humid tropical climate of ... [more ▼]

The effect of feed containing cassava leafs and peels was assessed on 126 local guinea fowls animal performance, production costs and meat quality over a period of 28 weeks in humid tropical climate of the South Benin. After 12 weeks of classical feeding, animals were randomly allotted in three groups of 42 for the finishing period: the group 1 received a control diet while, in group 2, 8% and 35 % of cassava leafs and cossets were respectively incorporated, vs. 6 % and 25 % in group 3. At the end of the trial, eighteen guinea fowls per group were slaughtered in order to determine characteristics of the carcass and meat quality. Individual daily feed intake was higher in the control group than in the groups 2 and 3. Animals from control group shown higher growth rate (5.0 g/d) (P<0.05) than in groups 2 and 3. Consequently, feed conversion ratios were similar in the three groups with values of 7.5, 6.7 and 6.9, in groups 1, 2 and 3, respectively. At the end of the trial, animals in control group were heavier than those in groups 2 and 3 (P<0.05). No negative influence of cassava cossets and leaf meals was observed on carcass quality in the experimental diets. Feed costs per kg live weight were reduced by 24.6 and 21.0% in groups 2 and 3, respectively, when compared to control group. Guinea fowl production appears thus more profitable with feed containing cassava leaves and cossets. Consequently, these ingredients could be alternative sources of energy and protein, with emphasis during the finishing period. [less ▲]

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See detailEtude du dysfonctionnement relationnel chez les couples ayant un enfant souffrant d'un trouble envahissant du développment
Léonard, Cathy; Blairy, Sylvie ULg

in Revue Francophone de Clinique Comportementale et Cognitive (2009)

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See detailLe jeu de l'acteur: une nouvelle méthode pour aborder l'affirmation de soi. Résultats d'une première étude portant sur trois groupes et follow-up
Delvaux, Muriel ULg; Sarto, Danielle; Roodthooft, S. et al

in Revue Francophone de Clinique Comportementale et Cognitive (2009)

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See detailA novel strategy of transcription regulation by intragenic nucleosome ordering.
Palmeira, Leonor ULg; Vaillant, Cédric; Chevereau, Guillaume et al

in Genome Research (2009)

Numerous studies of chromatin structure showed that nucleosome free regions (NFRs) located at 5' gene ends contribute to transcription initiation regulation. Here, we determine the role of intragenic ... [more ▼]

Numerous studies of chromatin structure showed that nucleosome free regions (NFRs) located at 5' gene ends contribute to transcription initiation regulation. Here, we determine the role of intragenic chromatin structure on gene expression regulation. We show that, along Saccharomyces cerevisiae genes, nucleosomes are highly organized following two types of architecture that depend only on the distance between the NFRs located at the 5' and 3' gene ends. In the first type, this distance constrains in vivo the positioning of n nucleosomes regularly organized in a "crystal-like" array. In the second type, this distance is such that the corresponding genes can accommodate either n or (n + 1) nucleosomes, thereby displaying two possible crystal-like arrays of n weakly compacted or n + 1 highly compacted nucleosomes. This adaptability confers "bi-stable" properties to chromatin and is a key to its dynamics. Compared to crystal-like genes, bi-stable genes present higher transcriptional plasticity, higher sensitivity to chromatin regulators, higher H3 turnover rate, and lower H2A.Z enrichment. The results strongly suggest that transcription elongation is facilitated by higher chromatin compaction. The data allow us to propose a new paradigm of transcriptional control mediated by the stability and the level of compaction of the intragenic chromatin architecture and open new ways for investigating eukaryotic gene expression regulation. [less ▲]

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See detailRedressing the "Narrative Balance": Subjection and Subjectivity in Chika Unigwe's On Black Sisters' Street
Tunca, Daria ULg

in Afroeuropa: Journal of AfroEuropean Studies = Revista de Estudios Afroeuropeos = Journal des Etudes Afroeuropénnes (2009), 3(1),

This article examines On Black Sisters’ Street (2009), the second novel by Nigerian-Belgian writer Chika Unigwe. After briefly outlining the pioneering role played by Unigwe’s “Afro-European” fiction in ... [more ▼]

This article examines On Black Sisters’ Street (2009), the second novel by Nigerian-Belgian writer Chika Unigwe. After briefly outlining the pioneering role played by Unigwe’s “Afro-European” fiction in Belgium, the essay argues that the author’s latest book presents its heroines, four African prostitutes working in Antwerp, as individuals caught between two forces: on the one hand, the social and economic pressures that lead to their subjection and, on the other, their wish to satisfy their own aspirations, which relates to the expression of their subjectivity. The article attempts to demonstrate that Unigwe’s novel explores the tension between these poles in at least four different ways: first of all, by using cultural stereotypes in an original manner; secondly, by developing the themes of renaming, slavery and objectification to point to the characters’ exploitation; thirdly, by hinting at the potential role of storytelling in the restoration of the prostitutes’ identity; and finally, by suggesting that the women’s very quest for subjectivity sometimes inadvertently induces their subjection. The essay concludes that Unigwe’s subtle treatment of these issues emphasises the complexity both of the novel’s protagonists and of their relationship with each other. [less ▲]

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See detailIntroducing the q-Theil index
Ausloos, Marcel ULg; Miskiewicz, J.

in Brazilian Journal of Physics (2009), 39(2A), 388-395

Starting from the idea of Tsallis on non-extensive statistical mechanics and the q-entropy notion, we recall the Theil index Th and transform it into the Th-q index. Both indices can be used to map onto ... [more ▼]

Starting from the idea of Tsallis on non-extensive statistical mechanics and the q-entropy notion, we recall the Theil index Th and transform it into the Th-q index. Both indices can be used to map onto themselves any time series in a non linear way. We develop an application of the Th-q to the GDP evolution of 20 rich countries in the time interval [ 1950 - 2003] and search for a proof of globalization of their economies. First we calculate the distances between the "new" time series and to their mean, from which such data simple networks are constructed. We emphasize that it is useful to, and we do, take into account different time "parameters": (i) the moving average time window for the raw time series to calculate the Th-q index; (ii) the moving average time window for calculating the time series distances; (iii) a correlation time lag. This allows us to deduce optimal conditions to measure the features of the network, i. e. the appearance in 1970 of a globalization process in the economy of such countries and the present beginning of deviations. The q value hereby used is that which measures the overall data distribution and is equal to 1.8125. [less ▲]

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See detailThe use of olive mill wastewater by wild type Yarrowia lipolytica strains: Medium supplementation and surfactant presence effect
Lopes, M.; Araújo, C.; Aguedo, Mario ULg et al

in Journal of Chemical Technology and Biotechnology (2009), 84(4), 533-537

Background: The aim of this work was to study the ability of two different wild type strains of the yeast Yarrowia lipolytica to grow on olive mill wastewater (OMW) and their potential to produce high ... [more ▼]

Background: The aim of this work was to study the ability of two different wild type strains of the yeast Yarrowia lipolytica to grow on olive mill wastewater (OMW) and their potential to produce high-value products such as lipases. Factors that affect cellular growth and OMW degradation were studied, such as nitrogen supplementation, cells concentration and surfactant addition. Results: Both strains, W29 and IMUFRJ 50682, were able to grow in OMW with 19 g L-1 of COD and approximately 800 mg L-1 of total phenols concentration. The strain W29 presented the highest potential for extracellular lipase production in OMW medium. Lipase productivity was improved by the medium supplementation with ammonium sulphate up to 6 g L-1, leading to 80% of COD degradation and 70% of total phenols reduction. The surfactant Tween 80 enhanced cell growth and COD degradation, but had a negative effect on lipase activity. Conclusions: Y. lipolytica has a great potential for OMW valorisation by its use as culture medium for biomass and enzymes production. The operating conditions that favoured lipase production differ from the conditions that improve COD reduction. © 2008 Society of Chemical Industry. [less ▲]

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See detailEnergising an exchange network between trainers in health promotion in the long term
Giot, Catherine ULg; Gosselain, Yves; Vanesse, Catherine et al

in Archives of Public Health (2009), 67(Supplement 2), 27-28

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See detailPortal on institutional territorial indicators available on internet in Europe
Devillet, Guénaël ULg; Breuer, Christophe ULg; Ostir, K. et al

in territorial-intellingence.eu (2009)

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See detailÉvolution (1979-2008) des services d'hospitalisation en Belgique. Quels liens avec la hiérarchie urbaine ?
Trotta, Marie ULg

in Bulletin de la Société Géographique de Liège (2009), 53

This research compares the spatial pattern of services provided in hospitals just before the introduction of the moratorium stopping the growth of the hospital sector (1979) with the current situation ... [more ▼]

This research compares the spatial pattern of services provided in hospitals just before the introduction of the moratorium stopping the growth of the hospital sector (1979) with the current situation (2008) by their relationship to urban hierarchy. The method used to analyze this relationship is the application of the statistic coefficient ϒ. This work shows that this relationship is significant for the two studied periods. However, the presence of a nearby faculty of medicine appears to interfere significantly on this relationship. The study also highlights a slight tendency to the strengthening of the aforementioned relationship. Besides, it demonstrates the existence of different spatial behaviours depending on the type of service. [less ▲]

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