Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
See detailA descriptive study of physico-chemical characteristics of Posidonia oceanica litter accumulation
Lepoint, Gilles ULiege; Borges, Alberto ULiege; Darchambeau, François ULiege et al

Poster (2012)

The Mediterranean seagrass Posidonia oceanica meadow losses every fall the major part of its leaf biomass after senescing. These phytodetritus may decay within the meadow, be buried or be exported to ... [more ▼]

The Mediterranean seagrass Posidonia oceanica meadow losses every fall the major part of its leaf biomass after senescing. These phytodetritus may decay within the meadow, be buried or be exported to other habitats. They form large litter accumulations, notably on shallow water sand patches. Such accumulation host many organisms which participate to the degradation of this material. In a first step to understand the dynamics of these accumulations and of their associated biota, we have characterised their physico-chemical heterogeneity at different seasons. We measured the dissolved oxygen, nutrients and sulphide concentrations in interstitial waters from litter accumulations varying regarding their phytodetritus composition, fragmentation level and thickness. Results show that oxygen conditions were highly variable depending on litter thickness but also on local hydrodynamics. Anoxic conditions and presence of sulphide were sometimes measured, particularly in very thick litter or in degraded litter at the end of summer. Colonies of sulphur-oxidising bacteria were observed. Litter accumulations were also often enriched in ammonium and, sometimes, in dissolved phosphorus. It is not clear whether this results from the litter degradation within the accumulation or whether this is a consequence of a barrier effect between sediment and water column. Nevertheless, this makes litter accumulations particularly attractive for micro-phytobenthic producers. Litter accumulations appear as key habitats both to understand the dead-face of seagrass dynamics and its consequence for C cycle in coastal areas and to study the consequence of hypoxia on biodiversity in a natural context. [less ▲]

Detailed reference viewed: 67 (14 ULiège)
See detailA Descriptive-Analytical Defense of Perceptual Contents
Dewalque, Arnaud ULiege

Conference (2013, October 22)

Suppose you perceive a cup of wonderful Italian coffee on the table in front of you. Is your visual experience best described as a representation-of a cup of coffee or as a relation-to a cup of coffee ... [more ▼]

Suppose you perceive a cup of wonderful Italian coffee on the table in front of you. Is your visual experience best described as a representation-of a cup of coffee or as a relation-to a cup of coffee? Representationalism and relationalism, I suggest, are two prominent options under discussion in the present-day philosophical investigations on perception. In this paper, I want to argue that both options are on the wrong track. The reason, basically, is that they are at odds with the analytical description of our perceptual experience. [less ▲]

Detailed reference viewed: 66 (4 ULiège)
Peer Reviewed
See detailDescriptiveness and proper name retrieval
Brédart, Serge ULiege; Valentine, T.

in Memory (1998), 6(2), 199-206

Cohen (1990) hypothesised that the retrieval of proper names is particularly difficult because proper names convey little information about their bearers' attributes. In the present study, this hypothesis ... [more ▼]

Cohen (1990) hypothesised that the retrieval of proper names is particularly difficult because proper names convey little information about their bearers' attributes. In the present study, this hypothesis was evaluated by using a face naming task. Faces were those of cartoon and comic-strip characters bearing either arbitrary names or descriptive names. Results unequivocally showed that retrieval blocks occurred more often in naming characters bearing arbitrary names than in naming characters bearing descriptive names. Moreover, retrieving arbitrary names that were also common names was as difficult as retrieving arbitrary names that were not common names. These results support Cohen's claim that arbitrariness plays a significant role in the relative vulnerability of proper name retrieval. [less ▲]

Detailed reference viewed: 50 (7 ULiège)
Full Text
Peer Reviewed
See detailDescriptors of Posidonia oceanica meadows: Use and application
Pergent-Martini, Christine; Leoni, Vanina; Pasqualini, Vanina et al

in Ecological Indicators (2005), 5(3), 213-230

The conservation of the coastal marine environment requires the possession of information that enables the global quality of the environment to be evaluated reliably and relatively quickly. The use of ... [more ▼]

The conservation of the coastal marine environment requires the possession of information that enables the global quality of the environment to be evaluated reliably and relatively quickly. The use of biological indicators is often an appropriate method. Seagrasses in general, and Posidonia oceanica meadows in particular, are considered to be appropriate for biomonitoring because of their wide distribution, reasonable size, sedentary habit, easy collection and abundance and sensitivity to modifications of littoral zone. Reasoned management, on the scale of the whole Mediterranean basin, requires standardized methods of study, to be applied by both researchers and administrators, enabling comparable results to be obtained. This paper synthesises the existing methods applied to monitor P. oceanica meadows, identifies the most suitable techniques and suggests future research directions. From the results of a questionnaire, distributed to all the identified laboratories working on this topic, a list of the most commonly used descriptors was drawn up, together with the related research techniques (e.g. standardization, interest and limits, valuation of the results). It seems that the techniques used to study meadows are rather similar, but rarely identical, even though the various teams often refer to previously published works. This paper shows the interest of a practical guide that describes, in a standardized way, the most useful techniques enabling P. oceanica meadows to be used as an environmental descriptor. Indeed, it constitutes the first stage in the process. (c) 2005 Elsevier Ltd. All rights reserved. [less ▲]

Detailed reference viewed: 268 (28 ULiège)
Full Text
See detailDesde las montañas del sureste
Vanden Berghe, Kristine ULiege

in González Boixo, José Carlos (Ed.) Tendencias de la narrativa mexicana actual (2009)

Detailed reference viewed: 74 (8 ULiège)
Full Text
See detailDésenchanter le cinéma ? Autour de "Blanche-Neige Lucie" de Pierre Huyghe
Tomasovic, Dick ULiege

in Mondes du cinéma (2016), 09

Etude des enjeux esthétiques et idéologiques du film "Blanche-Neige Lucie" de Pierre Huyghes.

Detailed reference viewed: 54 (27 ULiège)
Full Text
Peer Reviewed
See detailDesenvolvimento do portal NUFENA (Núcleo de Fenômica Animal)
Carvalho Filho, Ivan; Souza Duarte, Darlene Ana; Pereira Sanglard, Letícia Maria et al

in Simpósio de Integração Acadêmica - Conexão de Saberes e Mundialização (2015, October 19)

Detailed reference viewed: 3 (1 ULiège)
Full Text
See detailLe déséquilibre de force musculaire favorise-t-il la survenue d’une lésion ?
Croisier, Jean-Louis ULiege

in Actes du 2ème Colloque Médico-sportif « Entre laboratoire et terrain » (Liège) (2005, February)

Detailed reference viewed: 152 (9 ULiège)
Full Text
Peer Reviewed
See detailDéséquilibres des muscles agonistes/antagonistes du genou
Croisier, Jean-Louis ULiege

in Isocinétisme et Médecine Sportive (1998)

Detailed reference viewed: 95 (12 ULiège)
See detailDéséquilibres musculaires de l'épaule chez le joueur de tennis. Une étude isocinétique
Croisier, Jean-Louis ULiege

in Progrès en Médecine Physique et Réadaptation (2ème série) (1998)

Detailed reference viewed: 119 (8 ULiège)
See detailDéséquilibres musculaires de l'épaule chez le nageur de compétition : une étude isocinétique
Croisier, Jean-Louis ULiege; Luts, K.; Crielaard, Jean-Michel ULiege

in Actes de la réunion annuelle de la Société Belge de la Médecine et des Sciences du Sport (1997, May)

Detailed reference viewed: 68 (0 ULiège)
See detailLes déséquilibres musculaires de l'épaule du joueur de tennis de haut niveau : une étude isocinétique
Croisier, Jean-Louis ULiege; Mommer, R.; Lhermerout, Claude ULiege et al

in Abstract book du Congrès Européen de Kinésithérapie Eurokiné 95 (1995, October)

Detailed reference viewed: 66 (4 ULiège)
Full Text
Peer Reviewed
See detailDesert dust impacts on human health: an alarming worldwide reality and a need for studies in West Africa
De Longueville, Florence ULiege; Ozer, Pierre ULiege; Doumbia, Seydou et al

in International Journal of Biometeorology (2013), 57

High desert dust concentrations raise concerns about adverse health effects on human populations. Based on a systematic literature review, this paper aims to learn more about the relationship between ... [more ▼]

High desert dust concentrations raise concerns about adverse health effects on human populations. Based on a systematic literature review, this paper aims to learn more about the relationship between desert dust and human health in the world and to analyse the place of West Africa as a study area of interest. Papers focussing on the potential relationship between dust and health and showing quantitative analyses, published between January 1999 and September 2011, were identified using the ISI Web of Knowledge database (N = 50). A number of adverse health effects, including respiratory, cardiovascular and cardiopulmonary diseases, are associated with dust. This survey highlights obvious dust impacts on human health independently of the study area, health outcomes and method. Moreover, it reveals an imbalance between the areas most exposed to dust and the areas most studied in terms of health effects. None of these studies has been conducted in West Africa, despite the proximity of the Sahara, which produces about half of the yearly global mineral dust. In view of the alarming results in many parts of the world (Asia, Europe, America), this paper concludes by stressing the importance of carrying out impact studies of Saharan dust in West Africa, where dust events are more frequent and intense than anywhere else. [less ▲]

Detailed reference viewed: 225 (21 ULiège)
Full Text
See detailLa désertification : un faux problème ?
Ozer, Pierre ULiege

in Cafés Géographiques (2006), (Article N°880), 9

La désertification est considérée comme l’une des problématiques environnementales les plus préoccupantes du XXIe siècle. Par désertification, on entend la dégradation des terres dans les zones arides ... [more ▼]

La désertification est considérée comme l’une des problématiques environnementales les plus préoccupantes du XXIe siècle. Par désertification, on entend la dégradation des terres dans les zones arides, semi-arides et sub-humides sèches par suite de divers facteurs, parmi lesquels les variations climatiques et les activités humaines. Cette dégradation environnementale affecte directement un milliard d’hectares et menace près de 35% des terres de la planète ainsi que les moyens de subsistance de deux milliards d’individus. Les estimations des pertes financières mondiales dues à la désertification sont colossales, de l’ordre de 40 milliards d’euros par an. Ces chiffres parlent d’eux-mêmes et traduisent à quel point la dégradation des terres arides est une entrave au développement des pays les plus pauvres. [less ▲]

Detailed reference viewed: 102 (14 ULiège)
See detailLa désertification : une menace sérieuse pour le Bénin septentrional
Hountondji, Yvon ULiege; Ozer, Pierre ULiege

Article for general public (2006)

Detailed reference viewed: 32 (4 ULiège)
See detailLa désertification : une menace sérieuse pour le Bénin septentrional.
Hountondji, Yvon ULiege; Ozer, Pierre ULiege

Article for general public (2006)

Detailed reference viewed: 28 (4 ULiège)
Full Text
See detailDESERTIFICATION AND DROUGHT RELATED MIGRATIONS IN THE SAHEL – THE CASES OF MALI AND BURKINA FASO
Pearson, Nakia ULiege; Niaufre, Camille

in The State of Environmental Migration (2013), 3

The article compares the state of migration linked to drought and dessertification in Burkina Faso and Mali, reviews current international and domestic policies and makes recommendations. Cette article ... [more ▼]

The article compares the state of migration linked to drought and dessertification in Burkina Faso and Mali, reviews current international and domestic policies and makes recommendations. Cette article fait un comparaison entre les états des migrations liées à la sécheresse et la désertification au Burkina Faso et à Mali, en examinant les politiques actuels internationales et domestiques, et en formulant des recommandations politiques. [less ▲]

Detailed reference viewed: 81 (1 ULiège)
Full Text
Peer Reviewed
See detailDésertification au Sahel : Crise climatique ou anthropique ?
Ozer, André ULiege; Ozer, Pierre ULiege

in Bulletin des Séances de l’Académie Royale des Sciences d’Outre-Mer = Mededelingen der Zittingen van de Koninklijke Academie voor Overzeese Wetenschappen (2005), 51(4), 395-423

Over the last decades, the Sahel suffered two dramatic contiguous droughts. At present, and since the early 1990s, rainfalls have recorded an amelioration that tends towards the average of precipitation ... [more ▼]

Over the last decades, the Sahel suffered two dramatic contiguous droughts. At present, and since the early 1990s, rainfalls have recorded an amelioration that tends towards the average of precipitation previous to the 1970s. However, this improvement may be due to increasing rainfall intensity and it seems that the length of the rainy season did not show any extension when compared to the 1970s and 1980s. Moreover, the Sahelian population has been multiplied by 3 since 1950 and is foreseen to be multiplied by 10 by the second half of the 21st century. Increasing urban population levels are much more impressive and bring about important environmental disruptions every day. Such increasing human pressure leads to uncontrolled deforestation in order to meet the needs in fuel wood, wood for construction and shifting cultivation. In addition, the ever-increasing number of herds for contracting range conditions leads to overgrazing. All these processes cause the degradation of the vegetation cover, a constant diminution of crop yields, as well as a strong reduction of biodiversity. One of the consequences is the reactivation of previously fixed dunes that were formed during the last interpluvial phase (18,000 BP). This article provides a state-of-the-art of the present controversy about desertification processes and concludes that if the droughts of the 1970s and 1980s have had dramatic consequences for the population of the Sahel, current and coming increasing human pressure will intensify the desertification of the southern fringe of the Sahara. [less ▲]

Detailed reference viewed: 1289 (66 ULiège)
Full Text
Peer Reviewed
See detailDésertification au Sahel: Historique et perspectives
Ozer, Pierre ULiege; Hountondji, Yvon ULiege; Niang, Abdoul Jelil et al

in Bulletin de la Société Géographique de Liège (2010), 54

Over the last decades, the Sahel of West Africa has suffered two dramatic contiguous droughts. Currently, and since the late 1980s, rainfall amounts tend to catch up with the pre-1970 levels. However ... [more ▼]

Over the last decades, the Sahel of West Africa has suffered two dramatic contiguous droughts. Currently, and since the late 1980s, rainfall amounts tend to catch up with the pre-1970 levels. However, this improvement seems to occur through increased rainfall intensities but the duration of the rainy season did not significantly change since the 1970s and the 1980s. On the other hand, the Sahelian population has tripled since 1950 and it is foreseen to be multiplied by 10 by the second half of the 21st century. Increasing urban population levels are still much more impressive and cause profound environmental degradation. Such an increasing human pressure leads to uncontrolled deforestation in order to satisfy the needs in fuel and construction wood and to make place for shifting cultivation. In addition, larger and larger herds occupying contracting pasture areas leads to overgrazing and trampling. All these processes provoke the degradation of the vegetation cover, a constant diminution of crop yields, and a strong reduction of the biodiversity. This article provides a state of the art of recent findings and controversy that surround the desertification processes. We conclude that, if the droughts of the 1970s and 1980s have had dramatic consequences for the population of the Sahel, the future very high human pressure on the environment will most likely enhance the desertification of the southern fringe of the Sahara, especially in the case of the alarming climate change scenarios forecasting rainfall decrease all over the Sahel. [less ▲]

Detailed reference viewed: 1822 (121 ULiège)
Peer Reviewed
See detailDésertification dans le Sud nigérien, interprétation d’une image SPOT
Karimoune, Salifou; Donnay, Jean-Paul ULiege; Ozer, André ULiege

in Dubois, Jean-Marie; Boussema, Mohammed-Rached; Boivin, François (Eds.) et al Télédétection des ressources en eau : (1993)

Detailed reference viewed: 43 (1 ULiège)