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See detailA Descriptive-Analytical Defense of Perceptual Contents
Dewalque, Arnaud ULg

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 ▲]

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See detailDescriptiveness and proper name retrieval
Brédart, Serge ULg; 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 ▲]

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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 ▲]

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See detailDesde las montañas del sureste
Vanden Berghe, Kristine ULg

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

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See detailLe déséquilibre de force musculaire favorise-t-il la survenue d’une lésion ?
Croisier, Jean-Louis ULg

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

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See detailDéséquilibres des muscles agonistes/antagonistes du genou
Croisier, Jean-Louis ULg

in Isocinétisme et Médecine Sportive (1998)

Detailed reference viewed: 96 (11 ULg)
See detailDéséquilibres musculaires de l'épaule chez le joueur de tennis. Une étude isocinétique
Croisier, Jean-Louis ULg

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

Detailed reference viewed: 100 (8 ULg)
See detailDéséquilibres musculaires de l'épaule chez le nageur de compétition : une étude isocinétique
Croisier, Jean-Louis ULg; Luts, K.; Crielaard, Jean-Michel ULg

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

Detailed reference viewed: 54 (0 ULg)
See detailLes déséquilibres musculaires de l'épaule du joueur de tennis de haut niveau : une étude isocinétique
Croisier, Jean-Louis ULg; Mommer, R.; Lhermerout, Claude ULg et al

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

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See detailDesert dust impacts on human health: an alarming worldwide reality and a need for studies in West Africa
De Longueville, Florence ULg; Ozer, Pierre ULg; 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 ▲]

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See detailLa désertification : un faux problème ?
Ozer, Pierre ULg

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 ▲]

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See detailLa désertification : une menace sérieuse pour le Bénin septentrional
Hountondji, Yvon ULg; Ozer, Pierre ULg

Article for general public (2006)

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See detailLa désertification : une menace sérieuse pour le Bénin septentrional.
Hountondji, Yvon ULg; Ozer, Pierre ULg

Article for general public (2006)

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See detailDESERTIFICATION AND DROUGHT RELATED MIGRATIONS IN THE SAHEL – THE CASES OF MALI AND BURKINA FASO
Pearson, Nakia ULg; 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 ▲]

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See detailDésertification au Sahel : Crise climatique ou anthropique ?
Ozer, André ULg; Ozer, Pierre ULg

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 ▲]

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See detailDésertification au Sahel: Historique et perspectives
Ozer, Pierre ULg; Hountondji, Yvon ULg; 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 ▲]

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See detailDésertification dans le Sud nigérien, interprétation d’une image SPOT
Karimoune, Salifou; Donnay, Jean-Paul ULg; Ozer, André ULg

in Actes des journées scientifiques du réseau de télédétection de l’UREF : Outil micro-informatiques et télédétection de l’évolution des milieux (1993)

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See detailDésertification des parcours arides au Maroc
Mahyou, Hamid ULg; Tychon, Bernard ULg; Balaghi, Riad et al

in Tropicultura (2010), 28(2), 107-114

Rangeland or natural arid pastures of Morocco are ecosystems where there is a natural or seminatural vegetation composed of steppes, shrubs and grassland. They cover about 82% of the Moroccan arid lands ... [more ▼]

Rangeland or natural arid pastures of Morocco are ecosystems where there is a natural or seminatural vegetation composed of steppes, shrubs and grassland. They cover about 82% of the Moroccan arid lands. These areas represent livelihoods for thousands of people and protect the country from desertification. Despite the importance of the rangelands and the threat of desertification, it is surprising that up to date there is no comprehensive assessment of their condition and their evolution, hindering any plan for desertification alleviation. However, the available information on selected pilot areas shows that these rangelands are threatened by desertification. It’s associated with biodiversity loss and contributes to climate change. The leading causes of land degradation are the human actions combined with climate. The establishment of a comprehensive surveillance system based on remote sensing, biophysics and socio-economic data must be envisaged to provide policymakers with an operational tool adapted to the spatio-temporal monitoring of desertification. [less ▲]

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See detailLa désertification est-elle en recul au Sahel ?
Ozer, Pierre ULg; Gassani, Jean; Hountondji, Yvon ULg et al

in Bois et Forêts des Tropiques (2007), 293

Land degradation trends in arid, semi-arid and subhumid areas are such that the General Assembly of the United Nations has declared 2006 the International Year of Deserts and Desertification. Surprisingly ... [more ▼]

Land degradation trends in arid, semi-arid and subhumid areas are such that the General Assembly of the United Nations has declared 2006 the International Year of Deserts and Desertification. Surprisingly, a global review carried out for the Millennium Ecosystem Assessment concluded that existing data do not support the claim that the African Sahel is a desertification hotspot. Here, we try to understand the reasons why such conclusions were drawn. [less ▲]

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See detailDesertification in the Sahel: climatic or human driven causes?
Ozer, Pierre ULg; Ozer, André ULg

Conference (2009, July 07)

Over the last decades, the Sahel of West Africa has suffered two dramatic contiguous droughts. Currently, and since the early 1990, rainfalls record an amelioration that tends towards the average of ... [more ▼]

Over the last decades, the Sahel of West Africa has suffered two dramatic contiguous droughts. Currently, and since the early 1990, rainfalls record 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. On the other hand, 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 conduct important environmental distresses every day. Such increasing human pressure leads to uncontrolled deforestation in order to satisfy the needs in fuel wood, wood for construction and shifting cultivation. In addition, always larger herds for contracting range conditions lead to overgrazing and trampling. All these processes provoke the degradation of the vegetation cover, a constant diminution of crop yields, as well as a strong reduction of the biodiversity. One of the numerous consequences is the reactivation of previously fixed dunes that were formed during the last interpluvial phase (18000 BP). Our research provides a state of the art of recent findings and controversy that surround the 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 very likely enhance desertification processes of the southern fringe of the Sahara. [less ▲]

Detailed reference viewed: 315 (45 ULg)