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See detailMédecine & sport de haut niveau
Kaux, Jean-François ULg

in Sport et Médecine : droit au but (2014, May 15)

L’engouement pour les activités sportives demeure croissant auprès du grand public grâce à toute une série d’activités sportives novatrices (Zumba, Kaerobic, etc…) et de programmes de remise en forme ... [more ▼]

L’engouement pour les activités sportives demeure croissant auprès du grand public grâce à toute une série d’activités sportives novatrices (Zumba, Kaerobic, etc…) et de programmes de remise en forme (« Je cours pour ma forme », etc…), bénéfiques pour la santé. Cependant, les sportifs de haut niveau, professionnels ou non, valides ou handicapés, représentant l’excellence sportive, reconnus par le code et la charte du sport de haut niveau, ne représentent qu’une infime partie de la totalité des sportifs. Le sport de haut niveau repose sur des critères bien établis: la reconnaissance du caractère de haut niveau des disciplines sportives ; les compétitions de références (jeux olympiques, championnats d’Europe et du Monde…) ; la liste des sportifs de haut niveau ; les filières d’accès au sport de haut niveau. Les sportifs pratiquant au meilleur niveau bénéficient généralement de prédispositions physiques, adéquates au sport pratiqué. Cependant, sans entrainement spécifique (au sport pratiqué), ils ne pourraient pas atteindre ce niveau. Le médecin, travaillant dans l’ombre de ces sportifs, est là pour veiller sur leur santé, développer des stratégies de prévention lésionnelle et les soigner en cas de nécessité. Même s’il a la possibilité de superviser médicalement les compétitions sportives « en première loge », il est également souvent sous la pression arbitrale, des médias, des coaches, des présidents, des sportifs eux-mêmes… Au cours de sa carrière, le sportif risque de se blesser plus ou moins gravement, et se voit obligé de quitter la compétition pour laquelle il s’est préparé durant de nombreuses semaines voire des mois ou des années… Dans ce cas, il sera pris en charge par toute une équipe (kiné, chirurgien, préparateur physique, psychologue…) travaillant en synergie afin de le rétablir au plus vite et de retrouver son plus haut niveau. Avant le retour en compétition, une réathlétisation demeure indispensable. Celle-ci correspond à la reprise d’activité physique, comprenant : toute la phase de réadaptation à l’exercice la phase de transition entre les soins et la reprise de l’entraînement. Il s’agit d’un processus nécessaire à la prévention des blessures et à l’adaptation de l’organisme à un programme d’entraînement poussé. Cependant, il se peut que cette période de l’entraînement soit négligée en raison d’un manque de temps en vue d’un objectif trop proche, majorant le risque de récidive ou de nouvelle blessure. Le sportif de haut niveau se doit de garder une hygiène de vie parfaite, en ayant une alimentation équilibrée, et dénuée de toxique (alcool, drogue…) et en respectant des périodes de repos nécessaires entre les différentes phases d’activité physique. De plus, afin d’améliorer ses performances sportives, la préparation physique (endurance, résistance, force musculaire, souplesse…) et l’entrainement spécifique à chaque sport (technique, tactique, adresse et précision…) demeurent indispensables. Dès lors, la tentation de les améliorer artificiellement existe. En effet, le dopage consiste à absorber des substances ou à utiliser des actes médicaux afin d’augmenter artificiellement ses capacités physiques et/ou mentales. Or, l’utilisation de tout médicament devrait être limitée à des indications médicalement justifiées. Le code mondial anti-dopage est régit par l’Agence Mondiale Antidopage (AMA / WADA ; www.wada-ama.org ou www.dopage.be) et la liste des produits dopants est revue chaque année. [less ▲]

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See detailA 'price balance statistic' for optimizing pricing strategies: a better estimation of elasticities and cross-elasticities
Lurkin, Virginie ULg; Schyns, Michael ULg; Garrow, Laurie A. et al

Conference (2014, May 15)

Demand forecasting, price optimization and capacity controls form three major tools of revenue management. Over the past few decades, each discipline has generated a great deal of research but has ... [more ▼]

Demand forecasting, price optimization and capacity controls form three major tools of revenue management. Over the past few decades, each discipline has generated a great deal of research but has typically been studied separately from the others. Yet, better understanding their relationship gives an airline the opportunity to increase its profitability. In prior work, Tim Jacobs and colleagues introduced a macro-level metric known as the ‘Price Balance Statistic (PBS)’ for evaluating the quality of a given pricing strategy and guiding a search algorithm to identify an optimal alignment between pricing structure, scheduled capacity and RM controls using marginal revenue principles. The aim of our work is to incorporate additional modeling improvements to the PBS. The current model formulation uses price elasticity as input parameters and assumes perfect independency between the different fare classes. However, in reality, a passenger demand fluctuates between classes based on differences in prices. We propose to use instrumented variable linear regression methods to obtain parameter estimates for price elasticities and cross-elasticities. This modification incorporates accurate price elasticities but also the impact of a change in one fare class on another through the cross-elasticities. [less ▲]

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See detailLes huiles essentielles
Rotschild, Aude; Benini, Céline; Fauconnier, Marie-Laure ULg

Scientific conference (2014, May 14)

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See detailAdaptation to beach erosion in the African coastal cities: from the procrastination by the Government to the forced migration of the most precarious population. The case of Cotonou, Benin
Ozer, Pierre ULg; De Longueville, Florence ULg; Hountondji, Yvon Carmen et al

Poster (2014, May 14)

This analysis shows that the current impacts of geomorphological changes result mainly from the sum of human activities. However, it is necessary to consider the risk of coastal erosion and forced ... [more ▼]

This analysis shows that the current impacts of geomorphological changes result mainly from the sum of human activities. However, it is necessary to consider the risk of coastal erosion and forced migration (of mostly poor people) in the coming decades with the amplification of sea level rise due to global warming. [less ▲]

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See detailBelgian Grasshoppers: A Nutritious Food Source
Paul, Aman ULg; Frederich, Michel ULg; Blecker, Christophe ULg et al

Poster (2014, May 14)

Rapid urbanization and rising economies are creating shifts in the composition of global food demand, so it is necessary to explore new sources of food with better nutritional profile. Among the ... [more ▼]

Rapid urbanization and rising economies are creating shifts in the composition of global food demand, so it is necessary to explore new sources of food with better nutritional profile. Among the alternative food that exists are the grasshoppers, about 80 species of which are consumed worldwide. Grasshoppers are not only rich source of proteins and lipids but also some important minor component like vitamins and minerals. Edible species of grasshopper in Belgium were identified and attempts were made for the lab rearing of meadow grasshopper (Chorthippus parallelus). The lipids as well as protein contents of meadow grasshopper (Chorthippus parallelus) & long winged conehead (Conocephalus discolor) were investigated. The fatty acid compositions of these two species were determined by gas chromatography. Some of the physicochemical properties of the lipids extracted were also analyzed. These two grasshopper species could be really nutritious source of food. [less ▲]

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See detailImportant roles of SoHo proteins in vascular development: Sorbs1 and Sorbs2 have related but distinct functions in endothelial cells angiogenic properties
Bleuart, Anouck ULg

Doctoral thesis (2014)

Vascular system in all vertebrate organisms has in charge essential functions such as to bring nutrients, oxygen and signalling molecules to distant organs. Vascular network is established through ... [more ▼]

Vascular system in all vertebrate organisms has in charge essential functions such as to bring nutrients, oxygen and signalling molecules to distant organs. Vascular network is established through sequential and distinct processes. During embryogenesis, angioblasts give rise to differentiated endothelial cells, which form primary vessels through vasculogenesis. Expansion of this primary network is then achieved through a multistep process known as angiogenesis. During angiogenesis, remodelling of endothelial cell shape relies on cytoskeleton dynamics. In this study, our goal was to investigate the potential role of the SoHo family of adaptor proteins in angiogenesis. The SoHo family comprises three members, Sorbs1, Sorbs2 and Sorbs3. Although accumulative evidence links this protein family to the regulation of cell adhesion and actin cytoskeletal organisation, their expression and potential functions in endothelial cells remain unknown. Using zebrafish loss of function experiments combined with confocal imaging, we show that loss of Sorbs1 affects caudal vein-derived vessel formation, whereas Sorbs2 depletion impairs ISV development essentially derived from the dorsal aorta. We then demonstrated that both members impact on EC behaviour via regulation of RhoGTPases activity, leading to the vascular defects observed in vivo. Using a series of in vitro functional assays, we found that Sorbs1 and Sorbs2 have opposite effects on adhesives properties of HUVECs related to their ability to regulate different RhoGTPases. Sorbs1 depleted ECs adhere excessively to the ECM due to decrease in Rac1 activity. In contrast, loss of Sorbs2 impaired RhoA activation during adhesion and decreases cell adhesiveness to the matrix. Interestingly, these opposite effects on cell adhesion lead to similar outcome on EC migratory abilities, a decrease in cell migration. Here, for the first time, we establish a role for Sorbs1 and Sorbs2 in angiogenesis and demonstrate that these SoHo members are essential for EC adhesiveness and subsequent migratory abilities. [less ▲]

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See detailLes PPP comme nouveau mode de régulation du marché de l'emploi
Remy, Céline ULg

Conference (2014, May 14)

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See detailImproving soil conservation through an adapted tillage: experience from the cultivation of potatoes in Bamiléké's hills of Cameroon
Djoukeng, Henri Grisseur ULg; Tankou, Christopher Mubeteneh; Degré, Aurore ULg

Poster (2014, May 14)

The western highlands of Cameroon are an area where the population density and growth rates are the highest in the country. In this region, the main activity is agriculture, and rivers are the main source ... [more ▼]

The western highlands of Cameroon are an area where the population density and growth rates are the highest in the country. In this region, the main activity is agriculture, and rivers are the main source of safe drinking water. Lacks of arable land and especially against very complex land tenure, farmers are increasingly exploiting the hills (9-30 % slope) for the production of vegetable crops, mainly potatoes. The methods of preparation of soil found there are ridging in the direction of the slope and the culture dish. These practices promote erosion by runoff, generally compromises the multiple functions of agriculture, and in particular the environmental function (soil degradation, pollution and silting up of rivers) and the production function (incomes). In order to ensure soil stability and maintain good water quality of rivers, we put it up a new way of preparing the ground: the tied ridging. To quantify the effectiveness of the latter, we conducted tests of erosion by runoff with Wischmeier’s plots on the most exploited slopes, namely 11% and 29%. The run-off water and sediments were collected per plot and per block after every rain. The first analyses show that there is a significant difference between the culture dish or ridging along the slope and tied ridging. The major constraint of this practice lies in the increase of about 17% of the labor. Tied ridging reported losses in average land 16% lower compared with the ridging in the direction of the slope and 22% compared with the culture dish, he also presented higher yields of 65 % compared with the culture dish and the ridging in the direction of the slope. Despite the hardship, the test results have convinced the participants and some curious farmers which have adopted the technology during the next growing season. [less ▲]

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See detailPrévention quaternaire : agir est-il toujours justifié en médecine de famille ?
Widmer, Daniel; Herzig, Lilly; Jamoulle, Marc ULg

in Revue Médicale Suisse (2014), 10(430), 1052-6

La prévention quaternaire vise à protéger le patient ou la po- pulation de la surmédicalisation. Elle imprègne toute l’activité du médecin de famille par une interrogation tant sur l’utilité de la ... [more ▼]

La prévention quaternaire vise à protéger le patient ou la po- pulation de la surmédicalisation. Elle imprègne toute l’activité du médecin de famille par une interrogation tant sur l’utilité de la prévention primaire que du diagnostic précoce, ou sur les risques de la création de nouvelles entités pathologiques et d’une médecine maximaliste. Le médecin de famille favorise la prévention quaternaire en se centrant sur les priorités du patient et sur les ressources locales d’un système de soins efficace. [less ▲]

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See detailCarbon monoxide retrieved from ground based FTIR remote sensing in the mid-­‐ and near infrared spectral region
Petri, Christof; Blumenstock, Thomas; Hase, Frank et al

Conference (2014, May 14)

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See detailFrom propaganda to commemoration: reworking the national narrative.
Hamers, Jérémy ULg; Van Cauwenberge, Geneviève ULg

in Rethinking History (2014), 18(3), 423-437

In Belgium, memories of the World War I have contributed to the production and the perpetuation of a fractured national narrative. While the official narration emphasizes the unity of the Belgian state ... [more ▼]

In Belgium, memories of the World War I have contributed to the production and the perpetuation of a fractured national narrative. While the official narration emphasizes the unity of the Belgian state and glorifies the heroism of Belgian soldiers acting as a unified force against the German invader, a counter-narrative presents the Flemish soldiers as victims who were used as cannon fodder by the French-speaking commanding elite. In the immediate postwar period, newsreels largely reinforced the image of a national unity during the Great War. Ten years later, however, cinema took an active part in the production of a counter-memory. Met onze jogens aan den IJzer/With Our Troops on the Yser (Clemens De Landtsheer, 1928), a Flemish film, is a key work in this regard. This article first examines the narratives and formal strategies the film resorts to in order to forcefully deconstruct the patriotic narrative and to forge a ‘Flamingant,’ Flemish activist collective memory. It subsequently analyzes more recent Frenchspeaking documentary film projects aiming to commemorate the memory of the Great War. Lacking any overt problematization of their relationship to the Flemish separatist narrative, the documentaries are still shaped by it. Indeed, they either attempt to overcome it by reinforcing Belgium’s sense of national identity or to counterbalance it by putting forward a regional narrative that specifically revives the French-speaking Belgians’ memory of the War. [less ▲]

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See detailQuand les députés vont au cinéma. Le Prix Lux et ses paradoxes.
Hamers, Jérémy ULg

Conference (2014, May 13)

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See detailMicroplastics contamination in two planktivorous and commercial fish species
Collard, France ULg; Parmentier, Eric ULg; Das, Krishna ULg

Poster (2014, May 13)

Plastic pollution is a huge environmental concern and affects each marine ecosystem. Plastics are produced by millions of tonnes each year in the world and finally accumulate in oceans. They adsorb many ... [more ▼]

Plastic pollution is a huge environmental concern and affects each marine ecosystem. Plastics are produced by millions of tonnes each year in the world and finally accumulate in oceans. They adsorb many persistent organic pollutants, cause external and internal wounds and provoke blockage of the digestive tract of marine mammals, birds and turtles. Plastics can also threaten marine organisms of small size class in the same way by fragmenting in smaller parts that result in microplastics of less than five millimetres. These microplastics are of the same order of magnitude than plankton and can thus be ingested by filter-feeders, suspension-filters and planktivorous organisms such as fish. Few studies deal with microplastics ingestion by fish and even less by commercial fish species. The herring (Clupea harengus) and the sardine (Sardina pilchardus) were respectively the third and the eighth most caught fish species in the world in 2009. We focused our research on these two species which are of economic importance. We sampled around thirty individuals of each species in the Channel and in the North Sea in January 2013. The stomach contents were digested by sodium hypochlorite and then analyzed. Microplastics were characterized by size, colour and shape. The results of these analyses will highlight the need for studies about microplastics ingestion by planktivorous species. [less ▲]

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See detailImpact de la réduction des armes nucléaires américaines en Europe
Dumoulin, André ULg

Scientific conference (2014, May 13)

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See detailRevascularisation en cas d’artériopathie périphérique du membre inférieur – Résumé.
Vlayen, Joan; Holdt Henningsen, Kirsten; d’Archambeau, Olivier, Olivier et al

Report (2014)

Detailed reference viewed: 15 (3 ULg)