Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailVitamin D status of schoolchildren in Northern Algeria, seasonal variations and determinants of vitamin D deficiency
Djennane, M; Lebbah, S; Roux, C et al

in Osteoporosis International (in press)

Summary There are no published data on the vitamin D status of children living in North Africa. In 435 healthy Algerian children 5–15 years old, we found that vitamin D insufficiency (serum 25 ... [more ▼]

Summary There are no published data on the vitamin D status of children living in North Africa. In 435 healthy Algerian children 5–15 years old, we found that vitamin D insufficiency (serum 25-hydroxyvitamin D (25OHD) <50 nmol/L) was frequent, especially in winter. Low vitamin D status was associated with increased parathyroid hormone (PTH) and leg deformation Introduction As there are no published data on the vitamin D status of children living in North Africa, we evaluated the 25OHD concentration of healthy Algerian children at the end of summer and at the end of winter. As secondary objectives, we studied the various determinants of vitamin D status and the PTH-25OHD relationship in these subjects. Methods Four hundred thirty-five children 5–15 years old were examined and had a blood sample in September 2010. Of them, 408 were sampled again in March 2011. Results Median 25OHD concentration in the whole group was 71.4 nmol/L in September and 52.9 nmol/L in March. In September, 58.4, 29.9, and 8.1 % had a 25OHD concentration below 75, 50, and 30 nmol/L respectively. In March, these percentages increased to 65.2, 41.4, and 17.4 % for the 75, 50, and 30 nmol/L threshold, respectively. In multivariate analysis, older age, darker skin phototype, low daily vitamin D and calcium intake, poor socioeconomic status, and short daily sun exposure remained significantly associated with a 25OHD <50 nmol/L at both visits. In 72 (16.6 %) children, genu varum/valgum was present. Compared to the 363 children without leg deformation, they presented more frequently with the risk factors of vitamin D insufficiency. They also had lower 25OHD concentrations and higher PTH and tALP. Serum PTH and 25OHD concentrations were negatively and significantly correlated (r=−0.43; p<0.001) without a 25OHD threshold above which PTH does not decrease anymore. Conclusion Despite a sunny environment, vitamin D insufficiency is frequent in healthy Algerian children. [less ▲]

Detailed reference viewed: 10 (0 ULg)
Peer Reviewed
See detailProcédés et enjeux de l'écriture polémique dans le dossier épistolaire anti-adoptianiste du concile de Francfort (794)
Close, Florence ULg; Veyrard-Cosme, Christiane

in Actes du colloque international ""Écriture et genre épistolaires, IVe-XIe s". 5-8 juin 2013 (in press)

Relecture à deux voix – historico-littéraire – des pièces du dossier épistolaire de Francfort attribué à Alcuin visant à dégager les stratégies littéraires et oratoires mises en œuvres par Alcuin au nom ... [more ▼]

Relecture à deux voix – historico-littéraire – des pièces du dossier épistolaire de Francfort attribué à Alcuin visant à dégager les stratégies littéraires et oratoires mises en œuvres par Alcuin au nom des évêques francs, d’une part, et de Charlemagne, de l’autre, pour tenter de ramener l’épiscopat espagnol dans le giron romain. Réflexion sur le rôle, l’importance et la puissance stylistique du genre épistolaire, hérité de l’Antiquité, dans deux foyers importants de haute culture de l’époque – la péninsule ibérique et le monde insulaire. [less ▲]

Detailed reference viewed: 5 (0 ULg)
Full Text
Peer Reviewed
See detailApprentissage collectif et réflexivité systémique: le rôle des aceurs tiers dans la structuration des méta-organisations
Xhauflair, Virginie ULg

in Interventions Economiques = Papers in Political Economy (in press)

Detailed reference viewed: 30 (2 ULg)
Full Text
Peer Reviewed
See detailScalar triplet flavored leptogenesis: a systematic approach
Aristizabal Sierra, Diego ULg; Dhen, Mikael; Hambye, Thomas

in Journal of Cosmology and Astroparticle Physics [= JCAP] (in press)

Type-II seesaw is a simple scenario in which Majorana neutrino masses are generated by the exchange of a heavy scalar electroweak triplet. When endowed with additional heavy fields, such as right-handed ... [more ▼]

Type-II seesaw is a simple scenario in which Majorana neutrino masses are generated by the exchange of a heavy scalar electroweak triplet. When endowed with additional heavy fields, such as right-handed neutrinos or extra triplets, it also provides a compelling framework for baryogenesis via leptogenesis. We derive in this context the full network of Boltzmann equations for studying leptogenesis in the flavored regime. To this end we determine the relations which hold among the chemical potentials of the various particle species in the thermal bath. This takes into account the standard model Yukawa interactions of both leptons and quarks as well as sphaleron processes which, depending on the temperature, may be classified as faster or slower than the Universe Hubble expansion. We find that when leptogenesis is enabled by the presence of an extra triplet, lepton flavor effects allow the production of the B-L asymmetry through lepton number conserving CP asymmetries. This scenario becomes dominant as soon as the triplets couple more to leptons than to standard model scalar doublets. In this case, the way the B-L asymmetry is created through flavor effects is novel: instead of invoking the effect of L-violating inverse decays faster than the Hubble rate, it involves the effect of L-violating inverse decays slower than the Hubble rate. We also analyze the more general situation where lepton number violating CP asymmetries are present and actively participate in the generation of the B-L asymmetry, pointing out that as long as L-violating triplet decays are still in thermal equilibrium when the triplet gauge scattering processes decouple, flavor effects can be striking, allowing to avoid all washout suppression effects from seesaw interactions. In this case the amount of B-L asymmetry produced is limited only by a universal gauge suppression effect, which nevertheless goes away for large triplet decay rates. [less ▲]

Detailed reference viewed: 4 (0 ULg)
Peer Reviewed
See detailPre-war Planning in Belgium
Bechet, Christophe ULg

in Janz, Oliver; Apostolopoulos, Nicolas (Eds.) 1914-1918-online. International Encyclopedia of the First World War (in press)

Abstract: Since the Treaty of London in 1839, pre-war planning theories in Belgium oscillated between two positions: on one hand secure and defend which border would be endangered, on the other hand ... [more ▼]

Abstract: Since the Treaty of London in 1839, pre-war planning theories in Belgium oscillated between two positions: on one hand secure and defend which border would be endangered, on the other hand constitute in Antwerp a powerful national sanctuary. This concentration of most of the available military means in Antwerp was far more appropriate in the event of a French invasion. But this perspective decreased after the Franco-Prussian war in 1870, while the possibility of a trespassing by the two belligerents became greater and greater. The fortifications of Namur and Liège were voted by the Chambers in 1887 as a deterrent to both France and Germany. Nevertheless, without totally putting aside the defence of the Belgian southwestern border, high-ranking officers seemed to fear more and more a violation of the eastern border. Due to the completion of fortifications on the Meuse in 1892, German columns were supposed to move forward south of the river, through the Belgian Ardennes. On the eve of the Great War, King Albert I would have preferred to concentrate the army on the Meuse but his Chief of Staff selected a central position in order to maintain and secure his line of communication with Antwerp. The lack of a determined and “standardized” doctrine at the highest level of the army led to a “mixed” or compromise plan adopted in a hurry during the first days of mobilization in August 1914. [less ▲]

Detailed reference viewed: 12 (3 ULg)
Full Text
Peer Reviewed
See detailA generic approach for solving nonlinear-discrete security-constrained power flow problems in large-scale systems
Platbrood, Ludovic; Capitanescu, Florin; Crisciu, Horia et al

in IEEE Transactions on Power Systems (in press)

This paper proves the practicality of an iterative algorithm for solving realistic large-scale SCOPF problems. This algorithm is based on the combination of a contingency filtering scheme, used to ... [more ▼]

This paper proves the practicality of an iterative algorithm for solving realistic large-scale SCOPF problems. This algorithm is based on the combination of a contingency filtering scheme, used to identify the binding contingencies at the optimum, and a network compression method, used to reduce the complexity of the post-contingency models included in the SCOPF formulation. We show that by combining these two complementary ideas, it is possible to solve in a reasonable time SCOPF problems on large power system models with a large number of contingencies. Unlike most results reported for large-scale SCOPF problems, our algorithm uses a non-linear AC network model in both pre-contingency and post-contingency states, optimizes both active/reactive powers flows jointly, and treats the discrete variables. The proposed algorithm is implemented with state-of-the-art solvers and applied to two systems: a national grid with 2563 buses and 1297 contingencies, and a model of the European transmission network with 9241 buses and 12000 contingencies. [less ▲]

Detailed reference viewed: 33 (6 ULg)
See detailLa fin du Paléolithique moyen dans le Nord de l’Europe : la question des origines du Lincombien-Ranisien-Jerzmanowicien
Flas, Damien ULg

in Depaepe, Pascal (Ed.) Les plaines du Nord-Ouest : carrefour de l’Europe au Paléolithique moyen ? (in press)

Detailed reference viewed: 12 (1 ULg)
Full Text
Peer Reviewed
See detailProteins in the gas phase
Meyer, Tim; Gabelica, Valérie ULg; Grubmüller, Helmut et al

in Wiley Interdisciplinary Reviews: Computational Molecular Science (in press)

Proteins are complex macromolecules that evolved over billions of years to be active in aqueous solution. Water is a key element that stabilizes their structure, and most structural studies on proteins ... [more ▼]

Proteins are complex macromolecules that evolved over billions of years to be active in aqueous solution. Water is a key element that stabilizes their structure, and most structural studies on proteins have thus been carried out in aqueous environment. However, recent experimental approaches have opened the possibility to gain structural information on proteins from gas-phase measurements. The obtained results revealed significant structural memory in proteins when transferred from water to the gas phase. However, after several years of experimental and theoretical research, the nature of the structural changes induced by vaporization, the exact characteristics of proteins in the gas phase, and the physicochemical forces stabilizing dehydrated proteins are still unclear. We will review here these issues using both experimental and theoretical sources of information. [less ▲]

Detailed reference viewed: 14 (8 ULg)
See detailÉclairer les enjeux de la reconstruction industrielle du bassin liégeois : l'apport des archives des Etablissements insalubres et dangereux (1919-1925)
Peters, Arnaud ULg; Defechereux, Olivier ULg; Destatte, Julien ULg

in Parmentier, Isabelle (Ed.) Actes des Deuxièmes Rencontres d'Histoire de l'Environnement en Belgique (Belgique, Luxembourg, Congo, Rwanda, Burundi) (in press)

Detailed reference viewed: 13 (5 ULg)
Full Text
Peer Reviewed
See detailPostures d’apprenants et images sociotypées du professeur de français langue étrangère dans le contexte de la mobilité Erasmus
Meunier, Deborah ULg

in Langage et l'Homme (Le) : Recherches Pluridisciplinaires sur le Langage (in press)

Detailed reference viewed: 21 (0 ULg)
Full Text
Peer Reviewed
See detailMoyens et enjeux d’une approche didactique des Illuminations
Saint-Amand, Denis ULg

in Parade Sauvage (in press), 25

Detailed reference viewed: 15 (0 ULg)
Full Text
Peer Reviewed
See detailFigurations et médiogrammes. Les micro-fictions du Petit Bottin des Lettres et des Arts
Saint-Amand, Denis ULg

in Glinoer, Anthony; Lacroix, Michel (Eds.) Le travail de la référentialité : romans à clés et romans de la vie littéraire (in press)

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailEntre répit et déréliction : Berlin clubbing
Saint-Amand, Denis ULg

in Zimmermann, Margarete (Ed.) Ville des émotions : Berlin dans la littérature francophone contemporaine (in press)

Detailed reference viewed: 13 (0 ULg)
Full Text
See detailL’evidence-based practice à portée des orthophonistes : intérêt des recommandations pour la pratique clinique
Maillart, Christelle ULg; Durieux, Nancy ULg

in Rééducation Orthophonique (in press)

La démarche evidence-based practice (EBP) littéralement « pratique basée sur des preuves », a pour objectif d’aider le clinicien à optimiser ses choix thérapeutiques en s’appuyant sur des données ... [more ▼]

La démarche evidence-based practice (EBP) littéralement « pratique basée sur des preuves », a pour objectif d’aider le clinicien à optimiser ses choix thérapeutiques en s’appuyant sur des données objectives issues de la recherche tout en tenant compte de la situation clinique. Néanmoins, la méthodologie complète de récolte et d’analyse des données est complexe et chronophage, ce qui est un frein réel pour son application en clinique. Pour remédier à cela, des synthèses scientifiquement motivées, appelées des recommandations de pratique clinique (RPC) ou guidelines, se développent et jouent alors un rôle essentiel pour l’actualisation des connaissances des professionnels. Cet article s’intéresse particulièrement aux recommandations pour la pratique clinique et au rôle qu’elles peuvent jouer dans la sensibilisation des cliniciens au recours à une démarche EBP. [less ▲]

Detailed reference viewed: 58 (7 ULg)
Full Text
Peer Reviewed
See detailPostface
Saint-Amand, Denis ULg

in Ancion, Nicolas (Ed.) 'Les Ours n'ont pas de problème de parking' suivi de 'Le Dortoir' (in press)

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailA two-level emergency control scheme against power system voltage instability
Otomega, Bogdan; Glavic, Mevludin ULg; Van Cutsem, Thierry ULg

in Control Engineering Practice (in press)

A two-level adaptive control scheme against power system voltage instability is proposed, to deal with emergency conditions by acting on distribution transformers and/or by curtailing some loads. The ... [more ▼]

A two-level adaptive control scheme against power system voltage instability is proposed, to deal with emergency conditions by acting on distribution transformers and/or by curtailing some loads. The lower level includes distributed controllers, each acting once the voltage at a monitored transmission bus settles below a threshold value. The upper level benefits from wide-area monitoring and adjusts in real-time the voltage thresholds of the local controllers. Emergency detection is based on the sign of sensitivities. The proposed scheme is robust with respect to communication failures. Its performance is illustrated through detailed simulations of a small but realistic 74-bus test system. [less ▲]

Detailed reference viewed: 81 (16 ULg)
Full Text
Peer Reviewed
See detailAnomie de Rimbaud
Saint-Amand, Denis ULg

in Brissette, Pascal; Luneau, Marie-Pier (Eds.) Deux siècles de malédiction littéraire (in press)

Detailed reference viewed: 13 (0 ULg)
Full Text
Peer Reviewed
See detailLe Mur et le masque. À propos de Banksy.
Saint-Amand, Denis ULg

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

Detailed reference viewed: 26 (1 ULg)