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See detailUmbilical hernia under local anaesthesia: tips and tricks
DETRY, Olivier ULiege

Conference (2014, December 12)

Despite many studies confirming the feasibility and the interest of local anaesthesia for umbilical repair, its use is not generalized amongst the abdominal surgeons. The advantages of local anaesthesia ... [more ▼]

Despite many studies confirming the feasibility and the interest of local anaesthesia for umbilical repair, its use is not generalized amongst the abdominal surgeons. The advantages of local anaesthesia are indeed clear, including reduced costs, reduced hospital stay and reduced post operative pain. The success of the procedure depends on the skills and the motivation of the surgeon, of the nursing teams, and of the patient him/herself. The Mayo repair is ideally performed under local anaesthesia, but should be proposed to patients suffering from limited umbilical hernia with small defects. Prosthetic repairs might also be proposed under local anaesthesia, but large defects with rectus diastasis might require a full Rives/Stoppa repair in which local anaesthesia could not be sufficient. In obese patients, laparoscopic repair might be beneficial despite higher cost and longer hospital stay. Practically local anaesthesia requires some patience and quiet in the operative room. Operators should be aware that the action of local anaesthesia is delayed after injection. Local anaesthetics should be buffered and at body temperature at time of injection. Local anaesthetics containing Adrenalin allow longer pain control, with limitation of bleeding and less toxicity. Large and brutal movements should be avoided. Ligature and section of parts of greater omentum are feasible under local anaesthesia without patient discomfort. Tension free repair should be favoured, and during Mayo repair, the only painful part of the repair is often the closure of the defect with the different stiches. The surgical and anaesthetic techniques for umbilical hernia repair should be tailored to the specific characteristics of the umbilical hernia and of the patient. There is no method of choice that might fit for every patient. [less ▲]

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See detailHoney bee colony strength - Assessing accuracy of the Liebefeld estimation method
Leclercq, Gil ULiege; Gengler, Nicolas ULiege; Francis, Frédéric ULiege et al

Poster (2014, December 12)

Honey bee colony strength (number of adult bees in a colony) is a crucial character used for both breeding and research. In breeding programs a rough estimate is usually sufficient to select strong ... [more ▼]

Honey bee colony strength (number of adult bees in a colony) is a crucial character used for both breeding and research. In breeding programs a rough estimate is usually sufficient to select strong colonies. On the other hand, the accuracy of this character can deeply affect the quality of several studies in both fundamental and applied research. For example these studies are related to the assessment of low demographic variations following a stress, or the estimate of a host-parasite ratio (e.g. involving the mite Varroa destructor Anderson & Trueman). The “Liebefeld estimation method” is extensively used in these studies while its accuracy remains weakly documented. Our goal is to provide more information on the accuracy of this method. [less ▲]

Detailed reference viewed: 405 (7 ULiège)
See detailL’antithèse de la psychopathologie : à propos d’un inexistant
Englebert, Jérôme ULiege

Scientific conference (2014, December 12)

Detailed reference viewed: 19 (3 ULiège)
See detailKracauer : Photographie et Wirklichkeit
Barbion, Sébastien ULiege

Scientific conference (2014, December 12)

Detailed reference viewed: 17 (4 ULiège)
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See detailStable isotope ratios reveal trophic niche partitioning among hermit crabs from tropical polyspecific seagrass meadows
Michel, Loïc ULiege; Frederich, Bruno ULiege; Lavitra, Thierry et al

Poster (2014, December 12)

Polyspecific seagrass meadows are ubiquitous features of tropical coastal zones. These ecosystems are of critical ecological importance, and provide a wide range of socio-economical services to local ... [more ▼]

Polyspecific seagrass meadows are ubiquitous features of tropical coastal zones. These ecosystems are of critical ecological importance, and provide a wide range of socio-economical services to local populations. Meadows however undergo multiple threats linked to human activities (increased nutrient input, overfishing, invertebrate overharvesting, etc.). It is currently hard to assess how seagrass meadows could respond to anthropogenic impacts due to poor knowledge of their functional ecology. In an effort to unravel trophic interactions ruling the food webs associated to seagrass beds of the Toliara Great Reef (SW Madagascar), we studied resource segregation between two common Diogenidae hermit crabs (Dardanus scutellatus and Ciliopagurus tricolor) using stable isotope ratios. Interspecific differences were noted in isotopic composition of carbon (δ13C = -12.22 ± 1.73 ‰ for D. scutellatus, δ13C = -14.55 ± 0.73 ‰ for C. tricolor), nitrogen (δ15N = 4.73 ± 0.53 ‰ for D. scutellatus, δ15N = 5.20 ± 0.61 ‰ for C. tricolor) and sulfur (δ34S = 14.08 ± 2.32 ‰ for D. scutellatus, δ34S = 16.73 ± 1.49 ‰ for C. tricolor), suggesting that the two species do not feed on the same items. In addition, SIBER (Stable Isotope Bayesian Ellipses in R) modeling based on C and N data clearly showed that no overlap was present in the core isotopic niches of the two species. It also indicated that the isotopic niche of D. scutellatus was greater than the one of C. tricolor, implying that the former feeds on a greater number of items than the latter. While hermit crabs are generally considered as omnivorous species, this study highlighted differences in the foraging ecology of D. scutellatus and C. tricolor. These differences could help to limit competition for food between these two species, and facilitate their coexistence in Malagasy seagrass beds. [less ▲]

Detailed reference viewed: 106 (19 ULiège)
Peer Reviewed
See detailNegations in Late Egyptian: the general trends. A functional and typological perspective
Winand, Jean ULiege

Conference (2014, December 12)

Detailed reference viewed: 69 (1 ULiège)
Peer Reviewed
See detailA gammaherpesvirus infection protects against allergic asthma.
Machiels, Bénédicte ULiege; Dourcy, Mickael ULiege; Sabatel, Catherine ULiege et al

Poster (2014, December 12)

The “hygiene hypothesis” proposes that the augmentation of allergic diseases in developed countries could be linked to a reduced exposure to infections during childhood. Surprisingly, the potential ... [more ▼]

The “hygiene hypothesis” proposes that the augmentation of allergic diseases in developed countries could be linked to a reduced exposure to infections during childhood. Surprisingly, the potential protective role of herpesvirus infections against allergy development has never been addressed directly. In this study, we used the Murid herpesvirus 4 (MuHV-4) to study the impact of a persistent gammaherpesvirus infection on the development of House Dust Mites (HDM)-induced allergic asthma. Our results revealed that MuHV-4 infection affects both the sensitization and the challenging phases of HDM-induced airway allergy. In particular, we highlighted that MuHV-4 infection strongly impacts the lung innate immune response. Indeed, while the dendritic cells remained competent to uptake antigens and to migrate to the draining lymph nodes, MuHV-4 infection impaired their ability to trigger HDM sensitization. In the future, these results could allow us to develop strategies to prevent the development of TH2-skewed responses against respiratory allergens. [less ▲]

Detailed reference viewed: 56 (19 ULiège)
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See detailFrom Bad Models to Good Policies: an Intertwined Story about Energy and Reinforcement Learning
Fonteneau, Raphaël ULiege

Speech/Talk (2014)

Batch mode reinforcement learning is a subclass of reinforcement learning for which the decision making problem has to be addressed without model, using trajectories only (no model, nor simulator nor ... [more ▼]

Batch mode reinforcement learning is a subclass of reinforcement learning for which the decision making problem has to be addressed without model, using trajectories only (no model, nor simulator nor additional interactions with the actual system). In this setting, we propose a discussion about a minmax approach to generalization for deterministic problems with continuous state space. This approach aims at computing robust policies considering the fact that the sample of trajectories may be arbitrarily bad. This discussion will be intertwined with the description of a fascinating batch mode reinforcement learning-type problem with trajectories of societies as input, and for which crucial good decisions have to be taken: the energy transition. [less ▲]

Detailed reference viewed: 51 (3 ULiège)
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See detailShedding light on two unstudied species of Lepilemur in Northwest Madagascar
Wilmet, Leslie ULiege; Beudels-Jamar, Roseline C.; Schwitzer, Christoph et al

Poster (2014, December 12)

Detailed reference viewed: 41 (5 ULiège)
See detailFunambulisme, prudence et ruse. Analyse du contexte de travail des directeurs de prison en Belgique
Dubois, Christophe ULiege

Scientific conference (2014, December 12)

Cette contribution à l’analyse sociologique du travail des directeurs de prison éclaire tout d’abord le fondement de ce métier : la gestion de la détention. Présentée comme "individualisée ... [more ▼]

Cette contribution à l’analyse sociologique du travail des directeurs de prison éclaire tout d’abord le fondement de ce métier : la gestion de la détention. Présentée comme "individualisée/individualisante" dans les discours politique, la gestion de la détention s'exerce toutefois dans des contextes de travail bureaucratisés (que l'on pense à la gestion du personnel, à la gestion logistique, à la gestion comptable ou à la gestion stratégique), composés de diverses scènes d’interaction (organisationnelle, politique, associative, administrative, judiciaire, interministérielle) et marqués par les « référentiels » (Muller, 2000) de judiciarisation et de managérialisation du secteur public. L’étude du travail des directeurs de prison met ensuite en lumière trois mécanismes de régulation des établissements pénitentiaires : le pouvoir des [chefs] surveillants au centre d’une « régulation autonome » (Reynaud, 1988) ; la multi-dépendance inter-organisationnelle des prisons éprouvée quotidiennement par les directeurs au centre d’une « régulation croisée » (Crozier et Thoenig, 1975) ; l’articulation ponctuelle et « prudente » (Champy, 2012), par les directeurs, des contraintes et des opportunités inhérentes aux différentes scènes sur lesquelles ils interagissent. L'analyse de certaines situations concrètes révèle enfin que le travail des directeurs n’est pas seulement technique (sur les plans juridiques et administratifs) mais aussi politique: il requiert une hiérarchisation des valeurs ou des finalités poursuivies dans leur activité. [less ▲]

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Peer Reviewed
See detailMaintaining the coexistence of forest species of different shade tolerances with close-to-nature forestry
Ligot, Gauthier ULiege; Philippe, Balandier

Conference (2014, December 12)

Continuous-cover forestry has the goal of relying on natural regeneration, and maintaining irregular stand structure and tree species mixture. However, maintaining mixture of species with different shade ... [more ▼]

Continuous-cover forestry has the goal of relying on natural regeneration, and maintaining irregular stand structure and tree species mixture. However, maintaining mixture of species with different shade tolerances appears arduous with such a silvicultural system. Successfully managing irregular and mixed forests, relying on natural processes, requires a strong knowledge of the ecology of natural regeneration. In theory, regeneration dynamics depends upon the amount of transmitted radiation: shade-tolerant species dominate the regeneration under closed canopies whereas less shade-tolerant species dominate the regeneration under partially open canopies. Nevertheless, it explains hardly the difficulties faced by forest managers to maintain the coexistence of species of different shade tolerances. The purpose of this research is to define light requirements of two species with contrasting shade tolerances (Fagus sylvatica L. and Quercus petraea (Matt.) Liebl.) and, next, determining how understory light can be controlled by forest managers. We find that, contrary to our expectations, the shade-tolerant species outgrow the less shade-tolerant species in all light conditions. We next examine the effects of canopy structure and composition on understory light availability with a model of light interception by heterogeneous canopies. Various silvicultural treatments are tested in order to provide favorable understory light conditions for natural regeneration. The results underline that creating favorable understory light conditions for natural regeneration can be achieved with various regeneration treatments. However, the adequate reduction of stand density depends upon the chosen silvicultural strategies. The outcomes of this study highlight that the control of understory light can be insufficient to maintain the coexistence of species of contrasting shade tolerance, and provide guidelines for the management of understory light in heterogeneous forests. [less ▲]

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See detailRapid morphological change of barbels (Cyprinidae) after the dry-up of Sahara
Brahimi, Amina; Tarai, Nacer; Libois, Roland ULiege

Poster (2014, December 12)

Detailed reference viewed: 62 (8 ULiège)
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See detailSymptômes neurologiques du bord latéral du pied et de la cheville
WANG, François-Charles ULiege

Conference (2014, December 12)

Detailed reference viewed: 23 (4 ULiège)
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Peer Reviewed
See detailCo-evolution of the parasitic fungi Pneumocystis and their Muridae rodent hosts in Southeast Asia
Latinne, Alice ULiege; Bezé, François; Morand, Serge et al

Conference (2014, December 12)

Pneumocystis species are opportunistic and airborne-transmitted fungi that infect the lungs of numerous mammalian species. These highly diversified fungi are characterized by strong host specificity ... [more ▼]

Pneumocystis species are opportunistic and airborne-transmitted fungi that infect the lungs of numerous mammalian species. These highly diversified fungi are characterized by strong host specificity, probably associated with co-speciation. In this study, we investigate the Pneumocystis genetic diversity and infection rate in Muridae rodents of Southeast Asia in relation to environmental habitats. A total of 445 wild rodents belonging to 18 Southeast Asian Muridae species were tested for the presence of Pneumocystis in their lungs through PCR amplification of two Pneumocystis mitochondrial genes (mtLSU rRNA and mtSSU rRNA). Pneumocystis DNA was detected in 215 (48.3%) out of these 445 rodents. Eight highly divergent Pneumocystis lineages were retrieved in our phylogenetic tree. Three of these lineages correspond to the described species Pneumocystis murina (infecting Mus species), P. carinii (infecting Rattus species) and P. wakefieldiae (also infecting Rattus species). Three individuals belonging to Rattus norvegicus were found co-infected by both P. carinii and P. wakefieldiae. The five remaining lineages may correspond to several new undescribed Pneumocystis species and infect the lungs of Cannomys (lineage 1), Bandicota (lineage 2), Berylmys (lineage 3), Rattus (lineage 4) and Maxomys, Niviventer and Leopoldamys (lineage 5) Muridae genera. The congruence between phylogenies of Pneumocystis and their rodent hosts has been tested using co-phylogenetic analyses and the number of inferred co-speciation events is significantly greater than expected by chance. Rodent species, age and sex have no influence on the Pneumocystis infection rate among Muridae rodents but individuals trapped close to human settlements in patchy habitat were more likely infected by Pneumocystis parasites. [less ▲]

Detailed reference viewed: 49 (2 ULiège)
See detailDécouverte d'un gène du gigantisme
Beckers, Albert ULiege

Scientific conference (2014, December 12)

Detailed reference viewed: 20 (4 ULiège)
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See detailOpen Access, dream or reality for scholars: The ULg experience
Thirion, Paul ULiege

Conference (2014, December 12)

Since the “serial price crisis”, no institution in the world has been able anymore to provide to scholars with the scientific literature they need. Although it was the first reason why the scientific ... [more ▼]

Since the “serial price crisis”, no institution in the world has been able anymore to provide to scholars with the scientific literature they need. Although it was the first reason why the scientific community developed Open Access initiatives, it’s absolutely not the only one. Nowadays, the awareness has become so large that many research players have put OA on the agenda (NIH, WHO, H2020, Wellcome Trust, FRS-FNRS…). The two main existing complementary ways will be described (Green and Gold) and Fools’ Gold will be denounced (unfair gold, hybrid journals, predatory journals). The University of Liege is one of the world leaders in OA with Green and Gold initiatives. What benefits can scholars expect from OA as authors and as readers on the basis of that experience? [less ▲]

Detailed reference viewed: 105 (14 ULiège)
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See detailAre amphipods influenced by Posidonia oceanica seagrass features?
Sturaro, Nicolas ULiege; Lepoint, Gilles ULiege; Michel, Loïc ULiege et al

Poster (2014, December 12)

In the Mediterranean Sea, the seagrass Posidonia oceanica plays an important role as habitat for invertebrates, among which amphipod crustaceans represent a dense and diverse assemblage. Recent studies ... [more ▼]

In the Mediterranean Sea, the seagrass Posidonia oceanica plays an important role as habitat for invertebrates, among which amphipod crustaceans represent a dense and diverse assemblage. Recent studies have observed that amphipod density and biomass vary significantly on small spatial scales. This patchiness may be caused by different factors, such as recruitment, competition, and predation; however, habitat features, resulting in availability of resources such as food or shelter, may also be important in structuring these assemblages. This study examined the relationships between amphipod and habitat features in a P. oceanica meadow of the Revellata Bay (Corsica). The sampling was carried out in a continuous meadow colonizing soft substrates at constant depth in August 2008. We quantified the density and biomass of each amphipod species, as well as habitat features, namely shoot density, leaf and epiphyte biomasses, percentage of leaves per shoot having alteration marks and litter biomass. Using multiple regression analyses, few weak significant relationships were identified between amphipod and habitat features. The number of species and the diversity appeared unaffected by the measured habitat features. In contrast, total amphipod density and biomass were generally positively related to the shoot density and epiphyte biomass of P. oceanica, respectively. Overall, habitat features accounted for 0-30% of the variation in the densities of the amphipod species. A distance-based linear model explained a total of 25.8% of the variation of the amphipod assemblages (of which 18.6% was explained by litter biomass). Amphipods are therefore influenced by some P. oceanica features, but only weakly. Furthermore, some features appeared to influence individual species whereas others functioned at the assemblage level. The main challenge remains in evaluating the scale at which these features act and the way in which they influence the structure of assemblages. [less ▲]

Detailed reference viewed: 47 (5 ULiège)