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See detailRessources secondaires et matériaux bio-sourcés: complémentarité pour une construction durable
Courard, Luc ULg

Scientific conference (2014, November 06)

Le recyclage n'est pas un luxe ou une mode mais une nécessité, qui provient d'une constatation fort simple : nous vivons dans un monde limité. Contrairement à ce que nous avons cru fort longtemps, notre ... [more ▼]

Le recyclage n'est pas un luxe ou une mode mais une nécessité, qui provient d'une constatation fort simple : nous vivons dans un monde limité. Contrairement à ce que nous avons cru fort longtemps, notre activité humaine n'est pas infiniment développable, car bornée en termes d'énergie, de ressources naturelles, d'espace ou simplement de capacité d'adaptation de la nature. De cette constatation et de cette prise de conscience doit découler un comportement qui, essentiellement, est basé sur le respect que nous avons de nous-mêmes et donc de la nature (à ménager et non à aménager). Le recyclage, la réutilisation, le réemploi, la régénération ou la valorisation sont des comportements qui visent à minimiser l'énergie utilisée, à tirer un parti maximum des matériaux, à réduire les risques de pollution au moment de la fabrication, de l'utilisation ou de l'élimination de ces matériaux. D'une manière générale, cela signifie que l'on cherche à retarder le plus possible le moment où un objet devient un déchet. Cette démarche nécessite une vision d'ensemble de la vie du matériau ou de l'objet (Analyse du Cycle de Vie), au cours de laquelle un bilan est établi à chaque étape de vie - extraction des matières premières, fabrication, transformation, recyclage, élimination. Complémentairement aux matériaux dits « naturels » ou d’origine végétale, l’industrie de la construction intègre de plus en plus ces matériaux alternatifs, non sans quelques réticences psychologiques, normatives et techniques. Source de pollution importante (CO2, déchets solides, ..), la construction constitue aussi un réservoir majeur pour la valorisation de déchets et de sous-produits industriels : à côté de la filière traditionnelle de production des matériaux de construction et de la résurgence des matériaux bio-sourcés, les matériaux recyclés contribuent également au développement des matériaux du futur. [less ▲]

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See detailCouples et Parents Lesbiens et Gays: Stress, Résilience et Intervention Clinique
D'Amore, Salvatore ULg

Scientific conference (2014, November 06)

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See detailTerminologies of Translation in Greek and Latin
Rochette, Bruno ULg

Scientific conference (2014, November 06)

Since Greece is a linguistically closed domain, translations of literary texts exist only for utilitarian aims and appear mainly in the peripheral areas, such as Egypt, where the contacts between ... [more ▼]

Since Greece is a linguistically closed domain, translations of literary texts exist only for utilitarian aims and appear mainly in the peripheral areas, such as Egypt, where the contacts between languages and civilizations are close. As a result the Greek meta-language for translating is relatively poor and appears late in the history of the Greek language (especially during the Hellenistic and Roman periods). First, the family of ἑρμηνεύς (ἑρμηνεία, ἑρμηνεύω) designates the most genuine process of translation and involves a technical and scientific precision. We find mentions of interpreters (ἑρμηνεῖς) in Herodot and Xenophon. Translation is also considered from another point of view: ἑρμηνεύς is also the prophet. Indeed, the verb ἑρμηνεύω involves not only a translation but also an explication of the text. On the other hand, in classical Greek, the most generic and most widespread verb for translating is μεταφέρω. There are a lot of other compound verbs with the prefix μετα- (“change”) with different uses and senses: μεταβάλλω, μεταγράφω, μεταφράζω. The situation in Rome is quite different. It is not exaggerated to say that Rome is a civilization of translation. The first literary works in Latin are translations of Greek models. Throughout the history of Latin literature, from Livius Andronicus until Boethius, there have been translators. On the other hand, there is no theory of translation among the classical Latin authors. The only classical Latin author who presents such a theory is Cicero in a passage of the short treatise De optimo genere oratorum (14-15) written in 46 BCE. In this text, which can be considered one of the first theoretical writings on translation, Cicero uses some verbs and expressions meaning “to translate”. Cicero conceives translation according to two different points of view expressed by two Latin words: interpres/orator. The term interpres (in the etymological sense of “broker”) is to be understood in a neutral sense: it points out the translator as a simple intermediary who gives exact correspondence between the words from one language to another without taking into account the sense of the whole sentence or text. On the other hand, orator has a positive connotation. Cicero increases the importance of the activity of the orator because he tries not to replace one word with another, but instead to conserve two characteristics of the words, genus and uis. This theory will be developed by Christian authors, like Hieronymus, who translates the Bible. As a result, the Latin verbs to say “translate” are generally based on metaphors: a linear movement from one point to another (interpretari from interpres) to designate the literality of the translation, and a circular one (uertere), as in sanskrit vŗt “to turn”, for the liberty of the translator orator who translates, but also creates a new literary work. [less ▲]

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See detailRecent Northern Hemisphere stratospheric HCl increase due to atmospheric circulation changes
Mahieu, Emmanuel ULg; Chipperfield, M. P.; Notholt, J. et al

in Nature (2014), 515(7525), 104--107

The abundance of chlorine in the Earth’s atmosphere increased considerably during the 1970s to 1990s, following large emissions of anthropogenic long-lived chlorine-containing source gases, notably the ... [more ▼]

The abundance of chlorine in the Earth’s atmosphere increased considerably during the 1970s to 1990s, following large emissions of anthropogenic long-lived chlorine-containing source gases, notably the chlorofluorocarbons. The chemical inertness of chlorofluorocarbons allows their transport and mixing throughout the troposphere on a global scale[1], before they reach the stratosphere where they release chlorine atoms that cause ozone depletion[2]. The large ozone loss over Antarctica[3] was the key observation that stimulated the definition and signing in 1987 of the Montreal Protocol, an international treaty establishing a schedule to reduce the production of the major chlorine- and bromine-containing halocarbons. Owing to its implementation, the near-surface total chlorine concentration showed a maximum in 1993, followed by a decrease of half a per cent to one per cent per year[4], in line with expectations. Remote-sensing data have revealed a peak in stratospheric chlorine after 1996[5], then a decrease of close to one per cent per year[6,7], in agreement with the surface observations of the chlorine source gases and model calculations[7]. Here we present ground-based and satellite data that show a recent and significant increase, at the 2σ level, in hydrogen chloride (HCl), the main stratospheric chlorine reservoir, starting around 2007 in the lower stratosphere of the Northern Hemisphere, in contrast with the ongoing monotonic decrease of near-surface source gases. Using model simulations, we attribute this trend anomaly to a slowdown in the Northern Hemisphere atmospheric circulation, occurring over several consecutive years, transporting more aged air to the lower stratosphere, and characterized by a larger relative conversion of source gases to HCl. This short-term dynamical variability will also affect other stratospheric tracers and needs to be accounted for when studying the evolution of the stratospheric ozone layer. [less ▲]

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See detailImaginer-lire le Capital. Présentation des Nachrichten aus der ideologischen Antike d'Alexander Kluge
Pieron, Julien ULg

Scientific conference (2014, November 06)

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See detailThe Robust Economic Statistical Design of the Hotelling’s T^2 Chart
Faraz, Alireza ULg; Chalaki, Kamyar; Saniga, Erwin et al

in Communications in Statistics : Theory & Methods (2014)

Economic statistical designs aim at minimizing the cost of process monitoring when a specific scenario or a set of estimated process and cost parameters is given. However, in practical situations the ... [more ▼]

Economic statistical designs aim at minimizing the cost of process monitoring when a specific scenario or a set of estimated process and cost parameters is given. However, in practical situations the process may be affected by more than one scenario which may lead to severe cost penalties for upsetting the true scenario. This paper presents the robust economic statistical design (RESD) of the T^2 chart to reduce the monetary losses when there are multiple distinct scenarios. The genetic algorithm optimization method is employed here to minimize the total expected monitoring cost across all distinct scenarios. Through two numerical examples the proposed method is illustrated. Simulation studies indicate that the robust economic statistical designs should be encouraged in practice. [less ▲]

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See detailForest inventory with Terrestrial LiDAR: what about Hand-Held Mobile LiDAR?
Bauwens, Sébastien ULg; Bartholomeus, Harm; Piboule, Alexandre et al

Conference (2014, November 05)

For a decade, studies of the application of static Terrestrial Laser Scanner (TLS) in plotwise forest inventories are giving more and more effective results. In spite of the improvements occurring in ... [more ▼]

For a decade, studies of the application of static Terrestrial Laser Scanner (TLS) in plotwise forest inventories are giving more and more effective results. In spite of the improvements occurring in processing scan data to extract forest attributes, the occlusion effect is still limiting the processing efficiency. A multi-scan approach is recommended to reduce this effect. However, such approach needs pre-scan preparations (setting up the plot, targets positioning), it requires data registration and it comes at a higher data collection cost. In this study we explore the potential of a Hand-held mobile LiDAR System (HMLS) as new LiDAR tool to scan forest plots. HMLS data are compared to static TLS data (single and multi-scan) in terms of data acquisition, registration time and quality of automatic DBH extraction. The low weight, small size of the instrument and no targets requirements reduce the time of pre-scan preparations to the time needed for single scan which is 6 times less than scanning a plot with 5 scans. The registration time depends of the time spent to scan the plot and it is of the same magnitude than single scan. The resulting point cloud of the HMLS is noisier than TLS point clouds. Nevertheless, error on DBH estimations is similar to scanning a plot with a TLS positioned at 5 locations. RMSE is higher than multi-scan and close to single scan for trees detected by the both LiDAR technologies. This first study exhibits the high potential of HMLS by its simple use, which needs only one operator while presenting similar results in automatic DBH extraction than static TLS. Technology and registering method improvements of this type of mobile LiDAR will reduce the noise of the point cloud, which might reduce the DBH RMSE. [less ▲]

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See detailCarbon capture and storage at the University of Liège
Léonard, Grégoire ULg

Scientific conference (2014, November 05)

The objective of this presentation was to discuss the main technologies of CO2 capture, re-use and storage, with their respective characteristics (costs, challenges...), advantages and drawbacks. Then ... [more ▼]

The objective of this presentation was to discuss the main technologies of CO2 capture, re-use and storage, with their respective characteristics (costs, challenges...), advantages and drawbacks. Then, the second part of the presnetation highlights the main research results that have been achieved at the University of Liège in this field. [less ▲]

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See detailLa dépression chez l'adolescent: Mieux comprendre pour mieux agir
Boulard, Aurore ULg

Conference given outside the academic context (2014)

La dépression à l’adolescence fait depuis quelques années l’objet d’études épidémiologiques. Chez les adolescents, les taux de prévalence varient de 5 à 7% pour l’épisode dépressif majeur (EDM) et touche ... [more ▼]

La dépression à l’adolescence fait depuis quelques années l’objet d’études épidémiologiques. Chez les adolescents, les taux de prévalence varient de 5 à 7% pour l’épisode dépressif majeur (EDM) et touche deux fois plus de filles que de garçons. Selon une estimation, deux tiers d’entre eux ne seraient pas médicalement et/ou psychologiquement soignés. Pourtant les conséquences de ces épisodes dépressifs sont nombreuses et graves: troubles du caractère, échecs scolaires, conduites suicidaires. Un rapport récent de l’OMS montre qu’à l’heure actuelle, la dépression chez les adolescents âgés de 12 à 19 ans est la première cause de maladie et de handicap. Face à ce constat, il est de la plus haute importance de mieux comprendre cette maladie qui ne s’exprime pas de la même manière qu’à l’âge adulte et se confond régulièrement avec la « crise d’adolescence » afin de pouvoir prendre en charge ces adolescents et les aider. [less ▲]

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See detailPollution and Siltation of Rivers in the Western Highlands of Cameroon: a Consequence of Farmland Erosion by Runoff
Djoukeng, Henri Grisseur ULg; Tankou, Christopher Mubeteneh; Degré, Aurore ULg

Conference (2014, November 05)

In the western highlands agro-ecological zone of Cameroon, rivers are constantly silted and polluted with waste from cultivated plots. This study investigated on the characterization and quantification of ... [more ▼]

In the western highlands agro-ecological zone of Cameroon, rivers are constantly silted and polluted with waste from cultivated plots. This study investigated on the characterization and quantification of sediment from plots cultivated in the watershed Méloh; among these sediment we highlighted soil, plant residues, chemical packages and plastic casing used for irrigation. In a natural rocky bottom wells, we performed for a period of three years the collection, differentiation and measurement of trapped sediment in the cultivated part of river that runs through the watershed. The total cultivated area is about 7.5 ha; slopes are operated between 14% and 17%. During the years 2012 and 2013 where farmers practiced both flatbed and ridging along the steepest slope, two methods of land preparation that do not contribute positively to water conservation, we collected an average of 10.429 t.ha-1. During the 2013 crop year, with the participation of curious farmers we experimented tied ridging in a potato; this technique was adopted on 75% of plots in 2014 and we collected 3.586 t.ha-1, a decrease of 65.61% compared to the average of previous years. This study showed that traditional agricultural practices are a cause of siltation and pollution of the Méloh river, thus almost all rivers in the study area by what the topography is similar and agriculture the main activity. Tied ridging significantly reduced siltation of rivers; it is thus an effective technique to fight against water pollution in mountain agriculture. [less ▲]

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See detailBlackouts: des vérités qui dérangent
Ernst, Damien ULg

Speech/Talk (2014)

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See detailAprès-midi de rencontre avec les maîtres de stage du secondaire de l'ULg
Simons, Germain ULg; Van Hoof, Florence ULg; Pagnoul, Pierre ULg et al

Diverse speeche and writing (2014)

Durant les ateliers en didactique disciplinaire, la question : « Comment collaborer efficacement pour accompagner au mieux nos stagiaires ? » sera débattue par chaque didacticien en collaboration avec les ... [more ▼]

Durant les ateliers en didactique disciplinaire, la question : « Comment collaborer efficacement pour accompagner au mieux nos stagiaires ? » sera débattue par chaque didacticien en collaboration avec les maîtres de stage de sa discipline à travers des moyens tels que des situations vécues, des exemples écrits de préparations, des séquences vidéo, des outils d’évaluation des stages, etc. L’apport complémentaire de la didactique générale sera également présenté aux maîtres de stage. Cette après-midi permettra également de recueillir les attentes des maîtres de stage en termes de collaboration et de formation continue afin de construire les bases pour les rencontres des années à venir. [less ▲]

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See detailMise en perspective de l'après-midi de rencontre avec les maîtres de stages du Cifen
Simons, Germain ULg

Speech/Talk (2014)

Ce discours succinct est articulé autour de la question "fil rouge" de la journée de rencontre : "Comment collaborer efficacement pour accompagner au mieux nos stagiaires ?". Chaque élément de cette ... [more ▼]

Ce discours succinct est articulé autour de la question "fil rouge" de la journée de rencontre : "Comment collaborer efficacement pour accompagner au mieux nos stagiaires ?". Chaque élément de cette question est repris séparément et fait l'objet d'un bref commentaire visant à cadrer les travaux de l'après-midi organisés en sous-groupes disciplinaires. [less ▲]

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See detail"ME, MYSELF AND TED" : Réflexions sur l'intégration des Technologies Educatives aux pratiques professionnelles des enseignants
Van de Poël, Jean-François ULg; Verpoorten, Dominique ULg

Scientific conference (2014, November 05)

Cette conférence aborde les principaux courants utiles et les modèles qui sous-tendent l'usage des technologies éducatives dans la pratique de l'enseignant dans le supérieur.

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See detailIncorporate agroecology within research : The on-going story of four young researchers
Hatt, Séverin ULg; Artru, Sidonie ULg; Boeraeve, Fanny ULg et al

in Broadening Scopes on Food, Squeezing Urban Hinterlands (2014, November 04)

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See detailÉmissions gazeuses en production porcine
Philippe, François-Xavier ULg

Conference (2014, November 04)

Detailed reference viewed: 16 (2 ULg)