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See detailAssessment of changes in soil organic matter after invasion by exotic plant species
Koutika, Lydie*-Stella; Vanderhoeven, SONIA ULg; Chapuis-Lardy, Lydie et al

in Biology & Fertility of Soils (2007), 44(2), 331-341

Invasive exotic plants can modify soil organic matter (SOM) dynamics and other soil properties. We evaluated changes in particulate organic matter (POM) and carbon (C) mineralisation in adjacent plots ... [more ▼]

Invasive exotic plants can modify soil organic matter (SOM) dynamics and other soil properties. We evaluated changes in particulate organic matter (POM) and carbon (C) mineralisation in adjacent plots invaded by Solidago gigantea, Prunus serotina, Heracleum mantegazzianum and Fallopia japonica, and non-invaded control plots on different soils in Belgium. Litter decomposition of S. gigantea and P. serotina was compared to that of the native species Epilobium hirsutum, Betula pendula and Fagus sylvatica. Disregarding the differences in site characteristics (soil texture, parental material and plant species), we argued that the invasion by S. gigantea and P. serotina enhance SOM dynamics by increasing C mineralisation in 2 out of 3 sites invaded by S. gigantea and in 1 out of 3 sites invaded by P. serotina; C in coarse POM (cPOM, 4,000-250 mu m) and fine POM (fPOM, 250-50 mu m) in 1 site invaded by S. gigantea and C content in total POM (tPOM, 4,000-50 mu m) and the organo-mineral fraction (OMF, 0-50 mu m) in 1 site invaded by P. serotina. H. mantegazzianum and F. japonica slowed down SOM dynamics by reducing C mineralisation in three out of four sites; C and nitrogen (N) of fPOM in the invaded compared with the non-invaded plots at one site invaded by H. mantegazzianum. However, N content of cPOM (4,000-250 mu m) was higher in the invaded sites by F. japonica compared with the non-invaded plots. Our results indicated that the effects of invasion by exotic plant species were not species-specific but site-specific. [less ▲]

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See detailApplication de l’évaluation des risques dans la chaîne alimentaire. Introduction.
Saegerman, Claude ULg; Berkvens, D.

in Application de l’évaluation des risques dans la chaîne alimentaire (2007)

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See detailHistory of the Common Agricultural Policy : from the origin to the "mid-term review" in 2003
Burny, Philippe ULg

in Czech Presidency at the EU Council-Preparation & Priorities. Prague, the 28-29th November 2007. Proceedings (2007)

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See detailMéthodologie juridique : Méthodologie de la recherche documentaire juridique
Bruyère, Aurélie ULg; Geerkens Provin, Eric ULg; Delnoy, Paul ULg

Book published by Les Editions de l'Université de Liège (2007)

Comment trouver rapidement de la législation, de la jurisprudence ou des contributions doctrinales ? Ce manuel propose un accès pratique aux différentes sources du droit belge et européen.

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See detailEtudes de cas comparatives et bonnes pratiques
Teller, Jacques ULg

in Lieux Communs (2007), 10

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See detailLa "Joconde", une histoire, un parcours
Fagnart, Laure ULg

in Fagnart, Laure (Ed.) Catalogue de l'exposition La Joconde inattendue (Château du Clos Lucé) (2007)

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See detailStreven naar een gezinnenrecht
Leleu, Yves-Henri ULg

in Notarius : Revue pour le Notariat (2007), 3

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See detailLes dioxines dans la chaîne alimentaire : évaluation du risque dans le cadre normatif et dans le contexte d’un accident ponctuel.
Vromman, V.; Pussemier, L.; Saegerman, Claude ULg

in Application de l’évaluation des risques dans la chaîne alimentaire (2007)

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See detailCompte-rendu de l'ouvrage de G. Lloyd : In the Grip of Disease. Studies in the Greek Imagination
Nissen, Cécile ULg

in Archives Internationales d'Histoire des Sciences (2007), (158), 214-215

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See detailSaturation effects in elastic scattering at the LHC
Selyugin, O. V.; Cudell, Jean-René ULg

in Bartels, J.; Borras, K.; Diehl, M. (Eds.) et al 12th International Conference on Elastic and Diffractive Scattering (Blois Workshop) - Forward Physics and QCD (2007)

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See detailA stress-strain framework for modelling the behaviour of unsaturated soils under non-isothermal conditions.
François, Bertrand ULg; Lyesse, Laloui

in Springer Proceedings in Physics 113, Theoretical and Numerical Unsaturated Soils Mechanics (2007)

This paper addresses a new, unified thermo-mechanical constitutive model for unsaturated soils through a coupled study. In the context of elastoplasticity and the critical state theory, the model uses the ... [more ▼]

This paper addresses a new, unified thermo-mechanical constitutive model for unsaturated soils through a coupled study. In the context of elastoplasticity and the critical state theory, the model uses the concepts of multimechanism and bounding surface theory. This advanced constitutive approach involves thermo-plasticity of saturated and unsaturated soils. Bishop’s effective stress framework is adopted to represent the stress state in the soil. This stress is linked to the water retention curve, which is represented by an elasto-plastic model. Attention is focused particularly on the coupling relations inferred from this unified thermohydro-mechanical (THM) study. Finally, the theoretical aspects of the paper are supported by comparisons between numerical simulations and experimental results. [less ▲]

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See detailSupercritical fluid technology to produce solid lipid microparticles
Nizet, Dominique; Jaspart, Séverine ULg; Brion, Michael et al

Conference (2007)

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See detailEnergies et développement durable
Merenne-Schoumaker, Bernadette ULg

in Veyret, Yvette (Ed.) Le développement durable (2007)

L’énergie est une des composantes essentielles du développement durable et ce dans ses quatre dimensions : économique, sociale, environnementale et gouvernance. L'objectif de cette contribution à un ... [more ▼]

L’énergie est une des composantes essentielles du développement durable et ce dans ses quatre dimensions : économique, sociale, environnementale et gouvernance. L'objectif de cette contribution à un ouvrage sur le développement durable est de rappeler quelques notions de base sur l'énergie puis d'évoquer les ressources énergétiques d'aujourd'hui et de demain et enfin de mettre en évidence les grands enjeux : consommer mieux avec moins, réduire les inégalités dans le monde et responsabiliser les acteurs tout en renforçant la gouvernance mondiale [less ▲]

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See detailRetirement and cognitive reserve: a stochastic frontier approach applied to survey data
Adam, Stéphane ULg; Bonsang, Eric; Germain, Sophie ULg et al

Report (2007)

This paper proposes the use of the stochastic frontier approach to analyse the relationship between cognitive performance, retirement and non-professional activities of the 50+ individuals using data from ... [more ▼]

This paper proposes the use of the stochastic frontier approach to analyse the relationship between cognitive performance, retirement and non-professional activities of the 50+ individuals using data from three surveys conducted in Europe (the Survey on Health, Ageing and Retirement in Europe and the English Longitudinal Survey on Ageing) and United States (the Health and Retirement Study). Next to the strong relationship between cognitive performance, age and education, this study highlights the negative effect of retirement and the positive impact of non-professional activities and social contacts. [less ▲]

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See detailLes nouveaux concepts du développement territorial : une mode ou de nouveaux paradigmes ?
Merenne-Schoumaker, Bernadette ULg

in Van Nuffel, Nathalie (Ed.) Van Christaller tot Wallerstein. Liber Amicorum Prof. Dr. Pieter Saey (2007)

Recent transformations have drastically changed the way of thinking and organising territories' future. This article attempts to emphasize and criticize the new concepts that are currently founding the ... [more ▼]

Recent transformations have drastically changed the way of thinking and organising territories' future. This article attempts to emphasize and criticize the new concepts that are currently founding the territorial development in terms of jurisdiction, territorial intelligence, attractivity and competitiveness. It also focuses on new factors (innovation, training, network, identity, strategic management and governance) and development tools, such as competitiveness poles. [less ▲]

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See detailLa localisation des grandes zones logistiques
Merenne-Schoumaker, Bernadette ULg

in Bulletin de la Société Géographique de Liège (2007), (49), 31-40

The growth of logistics has recently fathered many new zones of specialized activities, called most of the times parks or logistic platforms. The objective of the article consists in understanding their ... [more ▼]

The growth of logistics has recently fathered many new zones of specialized activities, called most of the times parks or logistic platforms. The objective of the article consists in understanding their development and in identifying the logics of location. For this purpose, we have first tried to identify better the domain of activities: types of logistics, carried out operations, concerned sectors, concerned operators... Afterwards, on the basis of data mostly coming from professional circles, we have attempted to identify the factors and constraints of the new zones location, and to specify the mechanisms of the new real estate business linked to those zones, our goal consisting in bringing out the main principles of location on the scale of the countries, regions and sites choices. In the light of this first analysis, the logic seems pretty specific and takes place undoubtedly between the logic of industries and services. [less ▲]

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See detailTranscending binary logic by gating three coupled quantum dots
Klein, M.; Rogge, S.; Remacle, Françoise ULg et al

in Nano Letters (2007), 7

Physical considerations supported by numerical solution of the quantum dynamics including electron repulsion show that three weakly coupled quantum dots can robustly execute a complete set of logic gates ... [more ▼]

Physical considerations supported by numerical solution of the quantum dynamics including electron repulsion show that three weakly coupled quantum dots can robustly execute a complete set of logic gates for computing using three valued inputs and outputs. Input is coded as gating (up, unchanged, or down) of the terminal dots. A nanosecond time scale switching of the gate voltage requires careful numerical propagation of the dynamics. Readout is the charge (0, 1, or 2 electrons) on the central dot. [less ▲]

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