Last 7 days     Results 2461-2480 of 51610.   119 120 121 122 123 124 125 126 127 128 129   Newt life after fish introduction: extirpation of paedomorphosis in a mountain fish lake and newt use of satellite poolsDenoël, Mathieu ; Scime, Patrick; Zambelli, Nicolain Current Zoology (2016), 62(1), 61-69Fish introduction is one of the main causes of amphibian decline worldwide. It affects particularly rare aquatic phenotypes such as paedomorphs, which retain gills during the adult stage. In this context ... [more ▼]Fish introduction is one of the main causes of amphibian decline worldwide. It affects particularly rare aquatic phenotypes such as paedomorphs, which retain gills during the adult stage. In this context, we determined whether small wetlands, such as pools surrounding fished and fishless lakes, could sustain paedomorphic and metamorphic newts. To this end, we surveyed lakes known historically to sustain Alpine newts (Ichthyosaura alpestris) as well as 35 nearby pools. On the basis of the published records, the only known population exhibiting paedomorphosis in the Swiss Alps was found to be extirpated by salmonid introductions. However, the metamorphs persisted in peripheral pools, paedomorphosis was discovered at a new locality, and overwintering larvae were still present in one of the lakes. These results show the importance of conserving varied aquatic habitats such as pools in mountainous environments where the main resources can become unsuitable for amphibians because of fish introductions. Pools may also function as reservoirs in maintaining newt populations until programs to remove fish from lakes can be carried out. It is not known if paedomorphs could reappear after fish removal. However, the combined resilience of amphibians after fish removal and the genetic basis for paedomorphosis highlighted in other taxa by previous studies suggest that there is the potential to maintain this intraspecific case of diversity even after its disappearance. [less ▲]Detailed reference viewed: 204 (27 ULg) Questions de civilisation anglaiseBada, Valérie Learning material (2016)this Master's course focuses on the various histories, cultures and social, political and economic developments specific to the territories formerly under British domination.Detailed reference viewed: 20 (2 ULg) « Left Behind »? Le rôle des non-migrants dans les dynamiques de soins transnationalesZickgraf, Caroline in Bousetta, Hassan; Gsir, Sonia; Jacquemain, Marc (Eds.) et al Villes connectées Pratiques transnationales, dynamiques identitaires et diversité culturelle (2016)Detailed reference viewed: 15 (5 ULg) Dans les coulisses du pouvoir décisionnel : le rôle des organisations internationales dans l'expansion du financement basé sur les résultats dans les pays à faible et à moyen revenuTurcotte-Tremblay, Anne-Marie; Gautier, Lara; Bodson, Oriane et alin En Finir avec le New Public Management? De nouvelles perspectives pour l’action publique (2016)Detailed reference viewed: 32 (4 ULg) External Costs as Competitiveness Factors for Freight Transport — A State of the ArtMostert, Martine ; Limbourg, Sabine in Transport Reviews (2016)External costs have been a key issue in the last years of transport research. In Europe, this trend is in line with the political willingness to internalize externalities in transport pricing policies ... [more ▼]External costs have been a key issue in the last years of transport research. In Europe, this trend is in line with the political willingness to internalize externalities in transport pricing policies. This paper has two purposes. It first identifies the recent work achieved in the field of external costs of road and intermodal freight transport, where each paper is assessed in terms of its perspective (academic or project oriented), its objective (prescription, application, projection), the type of externality (air pollution, climate change, noise, accidents, congestion) and the type of cost (marginal, average, total) that is considered. The literature review reveals a gap in the development of generic mathematical functions for external costs of transport. The second objective of the paper is thus to highlight the usefulness of such functions by identifying the main parameters that influence freight transport competitiveness in terms of external costs, and by determining which of these parameters should be incorporated in further research works. [less ▲]Detailed reference viewed: 36 (7 ULg) Guidelines for the use and interpretation of assays for monitoring autophagy (3rd edition).Klionsky, Daniel J.; Abdelmohsen, Kotb; Abe, Akihisa et alin Autophagy (2016), 12(1), 1-222Detailed reference viewed: 97 (8 ULg) The Influence of Equivalent Contact Area Computation in 3D Extended Node to Surface Contact ElementsWautelet, Gaëtan ; Papeleux, Luc ; Ponthot, Jean-Philippe in Key Engineering Materials [=KEM] (2016), 681This paper extends the frictionless penalty-based node to contact formulation with area regularization to a 3D framework. Based on our previous work [1] focused on axisymmetric modeling, two computational ... [more ▼]This paper extends the frictionless penalty-based node to contact formulation with area regularization to a 3D framework. Based on our previous work [1] focused on axisymmetric modeling, two computational methods are also considered for the determination of the slave node area. The first method, named as the geometrical approach, is based on a force equivalence system, while the second one, named as the consistent approach, is derived from a more sophisticated scheme elaborated upon the virtual work principle. Then, the extended contact elements are derived for the contact formulations with geometrical and consistent area regularization and a consistent linearization is provided accordingly, which guarantees a quadratic rate of convergence of the global Newton Raphson iterative procedure. Finally, two numerical examples assess the performance of both contact formulations with area regularization and demonstrates the robustness and the efficiency of the node to surface contact formulation with consistent area regularization in reproducing a constant contact pressure distribution across the interface between a deformable body and a analytically-defined rigid body, irrespective of the mesh. Our findings will certainly encourage further developments towards the design of a penalty based node to surface contact algorithm passing the contact patch test, as was already done successfully in 2D contact problems [2]. [less ▲]Detailed reference viewed: 33 (12 ULg) A quadratic contact element passing the patch testNguyen, Duc-Tué; Rauchs, Gast; Ponthot, Jean-Philippe in Key Engineering Materials [=KEM] (2016), 681For the two dimensional contact modeling, the standard node-to-segment quadratic contact elements are known to exhibit oscillations of the contact pressure. This situation is particularly critical when ... [more ▼]For the two dimensional contact modeling, the standard node-to-segment quadratic contact elements are known to exhibit oscillations of the contact pressure. This situation is particularly critical when using the penalty method with a high penalty parameter because the amplitude of the oscillations increase with increasing penalty parameter. The aim of this article is to present a method for removing the oscillations of contact pressure observed while using quadratic contact element. For this purpose, the nodal forces at the slave and at the master nodes need to be evaluated appropriately. One possibility is to develop a suitable procedure for computing the nodal forces. In that sake, we selected the approach first proposed in [35] in an appropriate manner. After presenting the improved quadratic contact element, some numerical examples are illustrated in this paper to compare the standard quadratic node-to-segment element with the proposed element. The examples show that the proposed element can strongly reduce the oscillating contact pressure for both plane and curved contact surfaces. [less ▲]Detailed reference viewed: 27 (4 ULg) Vegetation classification and biogeography of European floodplain forests and alder carrsDouda, Jan; Boublik, Karel; Slezak, Michal et alin Applied Vegetation Science (2016)Aim: Formalized classifications synthesizing vegetation data at the continental scale are being attempted only now, although they are of key importance for nature conservation planning. Therefore, we aim ... [more ▼]Aim: Formalized classifications synthesizing vegetation data at the continental scale are being attempted only now, although they are of key importance for nature conservation planning. Therefore, we aim to provide a vegetation classification and to describe the main iogeographical patterns of floodplain forests and alder carrs in Europe. Location: Europe. Methods: A database of more than 40 000 vegetation plots of floodplain forests and alder carrs across Europe was compiled. After geographic stratification, 16 392 plots were available for classification, which was performed using the supervised method Cocktail. We also searched for new associations using semi-supervised K-means classification. The main biogeographic patterns and climate-related gradients in species composition were determined using detrended correspondence analysis and cluster analysis. Results: Thirty associations of floodplain forests and alder carrs were distinguished, which belong to five alliances. The Alnion incanae includes riparian, seepage and hardwood floodplain forests in the nemoral and hemiboreal zones (dominated by Alnus glutinosa and Fraxinus excelsior) and in the boreal zone (dominated by A. incana). The Osmundo-Alnion represents oceanic vegetation dominated by Alnus glutinosa, Fraxinus angustifolia and F. excelsior distributedmostly on the Iberian Peninsula and composed of species with Atlantic distribution and Iberian endemics. The Populion albae comprises floodplain forests frequently dominated by Fraxinus angustifolia, Populus alba and P. nigra that arewidespread in floodplains of large rivers under summer-dry climates in the Mediterranean region. The Platanion orientalis represents easternMediterranean floodplain forests dominated by Platanus orientalis. The Alnion glutinosae includes forest swamps dominated by Alnus glutinosa distributed mostly in the nemoral and hemiboreal zones. The main biogeographic patterns within European floodplain forests and alder carrs reflect the climatic contrasts between the Mediterranean, nemoral, boreal andmountain regions. Oceanic floodplain forests differ fromthose in the rest of Europe. The hydrological regime appears to be themost important factor influencing species compositionwithin regions. Conclusions: This study is the first applying a formalized classification at the association level for a broad vegetation type at the continental scale. The proposed classification provides the scientific basis for the necessary improvement of the habitat classification systems used in European nature conservation. [less ▲]Detailed reference viewed: 39 (10 ULg) "Translating Multilayered Sensory Experience"Bada, Valérie ; Pagnoulle, Christine in Palimpsestes (2016)The powerful impact of the plays by African American playwright August Wilson largely relies on the way his words appeal to the senses, whether explicitly by calling upon the characters’ sensory ... [more ▼]The powerful impact of the plays by African American playwright August Wilson largely relies on the way his words appeal to the senses, whether explicitly by calling upon the characters’ sensory experience or more indirectly through his use of syntactic rhythm, or indeed his specific modulation of AAVE. This article describes how the translators tried to create a French idiom that induces the same sensory impact on an audience and, at the same time, reflects the multilayered referentiality of the text. [less ▲]Detailed reference viewed: 20 (7 ULg) IGFBP2 sérique comme nouveau marqueur de la fibrose pulmonaire idiopathiqueGUIOT, Julien Conference (2016)Detailed reference viewed: 27 (5 ULg) Trace Elements in Marine Environments : Occurrence, Threats and Monitoring with Special Focus on the Costal MediterraneanRichir, Jonathan ; Gobert, Sylvie in Journal of Environmental and Analytical Toxicology (2016), 6:1Trace elements, as building blocks of matter, are naturally present in the environment. However, their extraction, production, use and release by men can lead to the increase of their environmental levels ... [more ▼]Trace elements, as building blocks of matter, are naturally present in the environment. However, their extraction, production, use and release by men can lead to the increase of their environmental levels to concentrations that may be toxic for both men and the biota. The overall aim of this review is therefore to recall that trace elements remain contaminants of concern that still require scientific attention. Because marine coastal systems (and transitional environments in general) are particularly vulnerable to contamination processes, they deserve to be accurately monitored with quality indicator species. As an example, the 2 most widely quality indicator species used to assess the health status of the coastal Mediterranean are the seagrass Posidonia oceanica and the mussel Mytilus galloprovincialis. In this review, after a short introduction on human pressures on the World Ocean and the coastal Mediterranean in particular (1), we will redefine the term trace element from an environmental perspective and discuss their accumulation and toxicity for men and the biota (2). We will consider the benefits of using biological indicators instead of water and sediment measurements to assess the health status of the marine environment (3), and more particularly as regards the accurate and complementary indicators that are seagrasses (4) and mussels (5). [less ▲]Detailed reference viewed: 23 (3 ULg) L’enfant, l’institutrice et le tableau interactif : Corps relationnel et évolution numériqueJadin, Aurore ; Englebert, Jérôme in Cahiers de Psychologie Clinique (2016), 46In clinical psychology, the ecological observation of child in different life domains offers many inaccessible observations through the individual therapy sessions. The article proposes, from a clinical ... [more ▼]In clinical psychology, the ecological observation of child in different life domains offers many inaccessible observations through the individual therapy sessions. The article proposes, from a clinical case, a reflection on the technological change of classes, particularly through the use of the interactive whiteboard, and the psychological and relational consequences of this revolution, for each of the protagonists. A consequence of this use of the digital device is that the body can appear less necessary and therefore be abandoned in favor of a poorly invested technicality. Our analysis values the development of a necessary compromise between digital and body. It proposes to find ways of arranging so that teacher's body is still a fundamental dimension of the educational process. [less ▲]Detailed reference viewed: 62 (3 ULg) Bott type periodicity for the higher octonionsKreusch, Marie in Journal of Noncommutative Geometry (2016), 9(4), 1041-1393We study the series of complex nonassociative algebras $\bbO_n$ and real nonassociative algebras $\bbO_{p,q}$ introduced in~\cite{MGO2011}. These algebras generalize the classical algebras of octonions ... [more ▼]We study the series of complex nonassociative algebras $\bbO_n$ and real nonassociative algebras $\bbO_{p,q}$ introduced in~\cite{MGO2011}. These algebras generalize the classical algebras of octonions and Clifford algebras. The algebras $\bbO_{n}$ and $\bbO_{p,q}$ with $p+q=n$ have a natural $\Z_2^n$-grading, and they are characterized by cubic forms over the field $\Z_2$. We establish a periodicity for the algebras~$\bbO_{n}$ and $\bbO_{p,q}$ similar to that of the Clifford algebras $\mathrm{Cl}_{n}$ and~$\mathrm{Cl}_{p,q}$. [less ▲]Detailed reference viewed: 152 (52 ULg) Impact of aging on associative memory for pre-existing unitized associations: the case of compound wordsDelhaye, Emma ; Bastin, Christine Poster (2016)Detailed reference viewed: 17 (3 ULg) L'élevage du barbeau en WallonieGennotte, Vincent ; Prignon, Christian Book published by Les Presses Agronomiques de Gembloux (2016)Ce document décrit les techniques d’élevage du barbeau, parcourant la reproduction, l’élevage larvaire et le grossissement des juvéniles, dans différentes conditions de production. Il constitue la ... [more ▼]Ce document décrit les techniques d’élevage du barbeau, parcourant la reproduction, l’élevage larvaire et le grossissement des juvéniles, dans différentes conditions de production. Il constitue la synthèse des résultats d’un programme de recherche mené par le Centre de Formation et de Recherche en Aquaculture (CEFRA, Université de Liège), et financé par le Service Public de Wallonie et le Fonds Européen pour la Pêche, visant à développer les techniques d’élevage de cette espèce dans le cadre d’un programme plus vaste de restauration des populations piscicoles patrimoniales de Wallonie. Ces résultats ont été complétés par les connaissances issues de recherches antérieures pour constituer un guide technique le plus complet possible, destiné au pisciculteur intéressé par la production de nouvelles espèces. [less ▲]Detailed reference viewed: 67 (30 ULg) The effect of aging on associative memory for semantically-related word pairsFolville, Adrien; Delhaye, Emma ; Bastin, Christine Poster (2016)Detailed reference viewed: 32 (4 ULg) Handling Intra-Household Correlations in Modeling Travel: A Comparison of Hierarchical (Random Effect) Models and Marginal (GEE) ModelsCools, Mario ; Moons, Elkein Proceedings of the 95th Annual Meeting of the Transportation Research Board (2016)In this paper, the necessity for treating intra-household correlation is investigated by analyzing two travel behavior indices, i.e. travel time and travel distance, for three important travel motives ... [more ▼]In this paper, the necessity for treating intra-household correlation is investigated by analyzing two travel behavior indices, i.e. travel time and travel distance, for three important travel motives (commuting, shopping, and leisure). Data stemming from the 2010 Belgian National Household Travel Survey are used in the analysis. Two model approaches that accommodate for intra-household correlation are compared, namely the generalized linear mixed model (GLMM) and GEE model approach. Both model approaches show that high levels of intra-household correlation are present, and therefore the use of models that take into account intra-household correlation, is strongly recommend. Results indicate that this requirement is the most urgent for non-commuting trips. Moreover, the results show that GLMM and GEE yield comparable estimates in the case of normally distributed data. Furthermore, evidence was provided that the more the estimates of the intra-household correlation provided by the two approaches differ, the less the homogeneity of the parameters is assured. In this regard, if one has to choose between the GLMM and GEE methodology, especially the negative consequences of choosing an inappropriate covariance model in the case of a GLMM model favor the selection of the GEE methodology. Further research is needed to compare the two approaches in the context of non-normally distributed travel behavior data. [less ▲]Detailed reference viewed: 25 (1 ULg) Recommendations for the conduct of clinical trials for drugs to treat or prevent sarcopeniaReginster, Jean-Yves ; Cooper, Cyrus; Rizzoli, René et alin Aging Clinical and Experimental Research (2016), 28(1), 47-58Purpose: Sarcopenia is an age-related muscle condition which is frequently a precursor of frailty, mobility disability and premature death. It has a high prevalence in older populations and presents a ... [more ▼]Purpose: Sarcopenia is an age-related muscle condition which is frequently a precursor of frailty, mobility disability and premature death. It has a high prevalence in older populations and presents a considerable social and economic burden. Potential treatments are under development but, as yet, no guidelines support regulatory studies for new drugs to manage sarcopenia. The objective of this position paper is therefore to suggest a set of potential endpoints and target population definitions to stimulate debate and progress within the medico-scientific and regulatory communities. Methods: A multidisciplinary expert working group was hosted by the European Society for Clinical and Economic Aspects of Osteoporosis and Osteoarthritis, which reviewed and discussed the recent literature from a perspective of clinical experience and guideline development. Relevant parallels were drawn from the development of definition of osteoporosis as a disease and clinical assessment of pharmaceutical treatments for that indication. Results A case-finding decision tree is briefly reviewed with a discussion of recent prevalence estimations of different relevant threshold values. The selection criteria for patients in regulatory studies are discussed according to the aims of the investigation (sarcopenia prevention or treatment) and the stage of project development. The possible endpoints of such studies are reviewed and a pleais made for the establishment of a core outcome set to be used in all clinical trials of sarcopenia. Conclusions : The current lack of guidelines for the assessment of new therapeutic treatments for sarcopenia could potentially hinder the delivery of effective medicines to patients at risk. [less ▲]Detailed reference viewed: 22 (6 ULg) Association Between Necropsy Evidence of Disseminated Intravascular Coagulation and Hemostatic Variables Before Death in Horses With Colic.Cesarini Latorre, Carlota ; Cotovio, M.; Rios, J. et alin Journal of veterinary internal medicine / American College of Veterinary Internal Medicine (2016), 30(1), 269-75BACKGROUND: Disseminated intravascular coagulation (DIC) is frequent in horses with severe gastrointestinal disorders. Postmortem studies have found fibrin microthrombi in tissues of these horses, but ... [more ▼]BACKGROUND: Disseminated intravascular coagulation (DIC) is frequent in horses with severe gastrointestinal disorders. Postmortem studies have found fibrin microthrombi in tissues of these horses, but studies relating these histopathological findings with antemortem hemostatic data are lacking. HYPOTHESIS: Antemortem classification of coagulopathy is related to the presence and severity of fibrin deposits observed postmortem in horses with severe gastrointestinal disorders. ANIMALS: Antemortem hemostatic profile data and postmortem tissue samples (kidney, lung, liver) from 48 horses with colic. METHODS: Tissue samples were stained with phosphotungstic acid hematoxylin and immunohistochemical methods for histological examination. A fibrin score (grades 0-4) was assigned for each technique, tissue and horse, as well as the presence or absence of DIC at postmortem examination. D-dimer concentration, prothrombin time (PT), activated partial thromboplastin time (aPTT), and antithrombin (AT) activity, as well as the clinicopathological evidence of coagulopathy, were determined from plasma samples collected 0-24 hours before death or euthanasia. Histologic and clinicopathologic data from the same horses were compared retrospectively. RESULTS: No association was found between antemortem classification of coagulopathy and postmortem diagnosis of DIC based on tissue fibrin deposition. None of the hemostatic parameters was significantly different between horses with or without postmortem diagnosis of DIC. There was no association between horses with fibrin in tissues or different cut-offs for D-dimer concentration and postmortem evidence of DIC. CONCLUSIONS AND CLINICAL IMPORTANCE: Abnormalities of the routine clotting profile, including D-dimer concentration, were not useful in predicting histologic evidence of DIC at necropsy in horses with severe gastrointestinal disorders. [less ▲]Detailed reference viewed: 9 (1 ULg)