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See detailComment le changement climatique influence-t-il la croissance du hêtre (Fagus sylvatica L.) le long du gradient bioclimatique de la Belgique ? Une approche dendroécologique.
Latte, Nicolas ULg

Doctoral thesis (2017)

Health anomalies (e.g., worsening crown conditions) on beech (Fagus sylvatica L.) observed throughout Europe since the 1990s have raised growing concerns among foresters, particularly about the future ... [more ▼]

Health anomalies (e.g., worsening crown conditions) on beech (Fagus sylvatica L.) observed throughout Europe since the 1990s have raised growing concerns among foresters, particularly about the future behavior of the species in the face of climate change. This PhD research examined the relationship between beech and its environment in the context of global changes using dendroecology, combination of dendrochronology and forest ecology. The radial growth was used to evaluate the effects of global changes, particularly climate change, on beech development and vitality over time along a bioclimatic gradient in Belgium. Various analyses were carried out using dendrochronological tools (pointer years, mean sensitivity, growth-climate correlation, etc.) and modeling approaches (linear and non-linear mixed models, partial least squares regression, etc.) considering several scales: tree, stand and region. Results show that climate predominantly influenced beech growth since the mid-20th century and did so rather uniformly across Belgium. Beech mean sensitivity increased mainly in response to the higher frequency and intensity of summer heat waves and spring droughts. Isolated but pronounced annual growth reductions induced a gradual diminution of mean growth. The increasing influence of climate progressively concealed the effect of local site growing conditions inducing strong between-sites synchronization along the bioclimatic gradient. Increasing mean sensitivity and decreasing mean growth were more pronounced in lowlands than in uplands, and for a given site, older trees are more affected than younger ones. Although mean sensitivity increases and mean growth decreases naturally with age, the climate change effect was much more important than the age effect. Furthermore, within a tree, along the main stem, climate sensitivity slightly decreased from breast height to crown base and strongly increased from crown base to tree top. These results were interpreted based on ecophysiological knowledge of beech. The influences of silviculture, soil compaction and nitrogen deposition (as part of atmospheric pollution) as well as the consequences of the past and future climate change on beech were discussed. Comparisons with other studies in Europe highlighted that beech is affected on a large part of its natural distribution range (except in high altitude and high latitude). Contrary to what one might think, beech is not only affected in the southern limit (Mediterranean). Although growing conditions are more favorable in Belgium, beech has also more to lose. Beech has coped with global change up to now. Although its climate sensitivity increased and its mean growth decreased, diebacks observed these last years in Belgium were scarce and generally scattered. However, considering the upcoming climate change, the phytosanitary risk will undeniable increased. Forest policy should now integrate that risk and prepare managers to anticipate and prevent it. [less ▲]

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See detail888 Tweets on the Art and Science of Internet-Based Investing
Choffray, Jean-Marie ULg

E-print/Working paper (2017)

Here we are! 888 Tweets on The Art and Science of Investing to “show you the way”, to share some observations on the evolution of the world, the behavior of the financial markets, and to illustrate the ... [more ▼]

Here we are! 888 Tweets on The Art and Science of Investing to “show you the way”, to share some observations on the evolution of the world, the behavior of the financial markets, and to illustrate the key heuristics that I learned over the last twenty years. As, without any doubt, I am no Warren Buffett, feel free to disagree and develop you own “theory” of investing. Painful and solitary work... Success is at that price! And, based on what I did - and did not! - achieve, it shouldn’t be hard to do much better... That’s my wish for you! [less ▲]

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See detailDécoder les verrous d’apprentissage d’une discipline
Verpoorten, Dominique ULg; Devyver, Julie ULg; Duchâteau, Dominique ULg et al

Conference (2017, February 21)

L’ULg a conduit une expérience pilote avec quelques enseignants. Elle vise à estimer le potentiel didactique et pédagogique d’un travail sur les « verrous d’apprentissage » (traduction délibérément ... [more ▼]

L’ULg a conduit une expérience pilote avec quelques enseignants. Elle vise à estimer le potentiel didactique et pédagogique d’un travail sur les « verrous d’apprentissage » (traduction délibérément adaptée de « bottleneck ») pour lutter contre l’échec, ou plutôt pour relever le défi de l’intégration intellectuelle du plus grand nombre. [less ▲]

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See detailAncient Egyptian philology: The digital turn. Current projects and future perspectives for the study of Ancient Egyptian texts
Polis, Stéphane ULg; Razanajao, Vincent ULg

Conference (2017, February 21)

Use of Information Technologies in Egyptology can be traced back to the early 1960s, when first efforts were made in documenting Meroitic scripts or emblematic corpora such as the Pyramid Texts. With the ... [more ▼]

Use of Information Technologies in Egyptology can be traced back to the early 1960s, when first efforts were made in documenting Meroitic scripts or emblematic corpora such as the Pyramid Texts. With the rise of the Digital Humanities in the mid-2000s, many new academic projects that implement IT solutions not only as a way to manage and present data, but also to produce, process and analyse the material, have come to light in the field. The aim of this paper is to give a survey of current digital projects related to the study of ancient Egyptian and Coptic texts. Our goal is not to be exhaustive, but to discuss the methods and tools that are being used and to describe the variety of scholarly practices. The first set of projects to be examined are those related to digital text editions and annotated corpora (including the types of representation format). Second, the question of how to handle the complex writing systems of Ancient Egypt will be addressed by looking at projects that focus on encoding (Manuel de Codage vs Unicode), on establishing hieroglyphic sign-lists (the Thot-Sign-List), on palaeographical databases and on ways to OCRize original texts efficiently. The issue of interoperability and data sharing will then be investigated through a presentation of several related projects working on a XML/TEI interchange format as well as on digital resources for enabling a Linked Open Data approach to the ancient Egyptian written material (http://thot.philo.ulg.ac.be/). Finally, we will argue in favour of a coherent data model so that encoding of data and metadata is done in the most effective way. [less ▲]

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See detailConception of a near-infrared spectrometer for ground-based observations of massive stars
Kintziger, Christian ULg; Desselle, Richard ULg; Loicq, Jerôme ULg et al

in Journal of Astronomical Telescopes, Instruments, and Systems (2017), 3(1), 015002

In our contribution, we outline the different steps in the design of a fiber-fed spectrographic instrument for stellar astrophysics. Starting from the derivation of theoretical relationships from the ... [more ▼]

In our contribution, we outline the different steps in the design of a fiber-fed spectrographic instrument for stellar astrophysics. Starting from the derivation of theoretical relationships from the scientific requirements and telescope characteristics, the entire optical design of the spectrograph is presented. Specific optical elements, such as a toroidal lens, are introduced to improve the instrument’s efficiency. Then the verification of predicted optical performances is investigated through optical analyses, such as resolution checking. [less ▲]

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See detailSurface characterization methods for quality control of repair
Garbacz, Andrzej; Bissonnette, Benoît; Courard, Luc ULg

Scientific conference (2017, February 20)

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See detailNotions de compatibilité relatives au développement de l'adhérence
Courard, Luc ULg; Garbacz, Andrzej; Bissonnette, Benoît

Scientific conference (2017, February 20)

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See detailMesure de l'adhérence et principaux paramètres d'influence
Bissonnette, Benoît; Courard, Luc ULg; Garbacz, ANdrzej

Scientific conference (2017, February 20)

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See detailAdhérence des réparations en béton: concepts, facteurs d'influence et évaluation
Bissonnette, Benoît; Courard, Luc ULg; Garbacz, Andrzej

Scientific conference (2017, February 20)

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See detailThe importance of pollen chemistry in evolutionary host shifts of bees
Vanderplanck, Maryse ULg; Vereecken, Nicolas; Grumiau, Laurent et al

in Scientific Reports (2017)

Although bee-plant associations are generally maintained through speciation processes, host shifts have occurred during evolution. Understanding shifts between both phylogenetically and morphologically ... [more ▼]

Although bee-plant associations are generally maintained through speciation processes, host shifts have occurred during evolution. Understanding shifts between both phylogenetically and morphologically unrelated plants (i.e., host-saltation) is especially important since they could have been key processes in the origin and radiation of bees. Probably far from being a random process, such host-saltation might be driven by hidden constraints associated with plant traits. We selected two clades of oligolectic bees (i.e., Colletes succinctus group and Melitta leporina group) foraging on co-flowering but unrelated host-plants to test this hypothesis. We analyzed floral scent, floral color and chemical composition of pollen from host and non-host plants of these two clades. We did not find evidence for host-plant evolution in the Melitta leporina group driven by one of the assayed floral traits. On the contrary, hosts of the C. succinctus group display similar primary nutritive content of pollen (i.e., amino acids and sterols) but not similar floral scent or color, suggesting that shared pollen chemistry probably mediates saltation in this clade. Our study revealed that constraints shaping floral associations are diverse and clearly depend on species life-history traits, but evidence suggests that pollen chemistry may act as a major floral filter and guide evolutionary host-shifts. [less ▲]

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See detailLe client au cœur de l’organisation ?
Delcourt, Cécile ULg

Article for general public (2017)

Une organisation est centrée sur ses clients (customer-centric organization) quand elle met le client au cœur de sa stratégie et de ses processus. Bien que mettre les clients au centre de l’organisation ... [more ▼]

Une organisation est centrée sur ses clients (customer-centric organization) quand elle met le client au cœur de sa stratégie et de ses processus. Bien que mettre les clients au centre de l’organisation peut sembler une évidence en théorie ; en pratique cela s’avère plus ardu. [less ▲]

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See detailLevinas et les limites de la phénoménologie
Boccaccini, Federico ULg

Conference (2017, February 17)

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See detailLe remembrement-relotissement en Wallonie et aux Pays-Bas : est-il possible de réveiller la Belle Endormie ?
Dethier, Perrine ULg; Halleux, Jean-Marie ULg

Conference (2017, February 17)

Le dispositif du remembrement-relotissement, aussi appelé « Association Foncière Urbaine » en France, est un outil foncier qui permet de réaménager le maillage parcellaire et les espaces publics. Il a ... [more ▼]

Le dispositif du remembrement-relotissement, aussi appelé « Association Foncière Urbaine » en France, est un outil foncier qui permet de réaménager le maillage parcellaire et les espaces publics. Il a pour finalité de matérialiser un projet urbain et il est associé au transfert à une structure de copropriété des droits de propriété relatifs aux terrains nécessaires à la réalisation du projet en question. Il revient ensuite à cette structure de copropriété de gérer le développement du périmètre. À l’issue de l’aménagement, les propriétaires sont rétribués proportionnellement à la valeur de leurs apports fonciers respectifs. Le remembrement-relotissement est considérée comme une « Belle endormie » de l’aménagement . En effet, alors que ce dispositif présente de nombreux avantages (mobilisation du foncier à faible coût, développement de projets intégrés…), il n’est que très rarement appliqué sur le terrain . C’est dans ce cadre que se situe notre proposition, dont l’objectif est de chercher à comprendre les raisons qui limitent l’usage de cette procédure ainsi que les leviers susceptibles d’enfin banaliser sa pratique. Notre intervention sera structurée en trois parties. En première partie, nous développerons les résultats d’une analyse ayant cherché à comprendre la non-utilisation du dispositif au sein du contexte wallon . Ce travail a mis en avant que le remembrement-relotissement souffre d’une mauvaise image auprès des experts wallons de l’aménagement du territoire. Le problème fondamental réside dans la faible faisabilité liée à l’incapacité de mobiliser de concert un nombre suffisamment élevé de propriétaires. La seconde partie de notre intervention sera consacrée à la situation néerlandaise. Aux Pays-Bas, le remembrement-relotissement n’est pas non plus un outil fréquemment utilisé, ce qui s’explique par la tradition de production foncière publique. En effet, il est inutile de chercher à travailler avec les propriétaires lorsque les collectivités locales sont directement à la manœuvre pour mettre en place les projets de développement. Pour autant, en raison de la crise du modèle néerlandais de la production foncière publique, le remembrement-relotissement est aujourd’hui considéré par les autorités néerlandaises comme un outil très important afin de continuer à contrôler les montages opérationnels tout en limitant l’implication financière des collectivités. Il ressort de la comparaison entre les Pays-Bas et le Wallonie que le différentiel de confiance entre acteurs est une explication fondamentale de l’opposition entre les deux contextes. Dans ce cadre, la troisième partie de notre intervention rendra compte d’une recherche en cours qui vise à objectiver l’impact des cultures d’aménagement sur les montages opérationnels. Ce projet, qui s’appuie sur le champ de l’économie comportementale , vise en particulier à traiter des thématiques de l’aversion face aux risques et de l’importance de la confiance dans le développement des partenariats et des coopérations. [less ▲]

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See detailLa Relation comme "unité dans la diversité". Esquisse du système dialectique de Leibniz
Dony, Arthur ULg

Scientific conference (2017, February 17)

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See detailÉtudier un genre littéraire en Égypte Ancienne : approche(s) et méthode
Motte, Aurore ULg

Conference (2017, February 16)

Detailed reference viewed: 22 (1 ULg)