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See detailLaudanum. Notes pour un rêve de Tracy Moffat
Havelange, Carl ULg

in Strivay, Lucienne; LE ROUX, Géraldine (Eds.) La revanche des genres. Art contemporain australien/The revenge of Genres. Australian Contemporary Art (2007)

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See detailLaudatio Alberto Manguel
Durand, Pascal ULg

Speech/Talk (2007)

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See detailLaudatio Hubert Nyssen
Durand, Pascal ULg

Speech/Talk (2003)

Présentation de la double carrière d'Hubert Nyssen écrivain et éditeur à l'occasion de son doctorat honoris causa à l'Université de Liège

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See detailLaura GIANVITTORIO, "Il discorso di Eraclito. Un modello semantico e cosmologico nel passagio dall’oralità alla scrittura"
Gavray, Marc-Antoine ULg

in Antiquité Classique : Revue Interuniversitaire d'Etudes Classiques (2012), 81

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See detailLaura. Enduring – or enjoying – endurance training.
Cloes, Marc ULg; Hody, Stéphanie ULg; Jidovtseff, Boris ULg et al

in Armour, Katheleen (Ed.) Pedagogical cases in physical education and youth sport (2014)

This chapter presents a pedagogical case presenting a 15-year-old girl who met some episodes of drop in blood pressure in the morning when beginning school. Her physical education (PE) teacher has to find ... [more ▼]

This chapter presents a pedagogical case presenting a 15-year-old girl who met some episodes of drop in blood pressure in the morning when beginning school. Her physical education (PE) teacher has to find a way to deal with such situation. Three scientists from physiology, fitness training and psychology analyze the scenario and underline the knowledge that should be used by the PE teacher in order to implement appropriate lessons. Sport pedagogists propose then a concrete contribution based on this interdisciplinary analysis. Such paper is a fantastic adventure for scholars who are invited to exchange their representations, knowledge et ideas in order to develop strong approaches. The refective process is an example for preservice education but also for all practioneers and PE teacher educators. [less ▲]

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See detailLaurent (Brice), Les politiques des nanotechnologies. Pour un traitement démocratique d’une science émergente
Thoreau, François ULg

in Politix : Revue des Sciences Sociales du Politique (2011), 2011/4(96), 187-190

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See detailLaut- und Graphementsprechungen
Lutjeharms, Madeline; Möller, Robert ULg

in Hufeisen, Britta; Marx, Nicole (Eds.) EuroComGerm - Die sieben Siebe: Germanische Sprachen lesen lernen (2007)

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See detailLautréamont : une politique du corps ?
Durand, Pascal ULg

Conference (2002, September 26)

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See detailLavantamento da Brucella mellitensis no rebanho caprino leiteiro da Grande Fortaleza
Rodrigues, A. P. R.; Melo de Sousa, Noelita ULg; Sousa, M. Z. G.

in Anais du II Encontro de Iniciação Científica da UECE (1993)

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See detailIl lavoro clinico con i genitori omosessuali
D'Amore, Salvatore ULg

Scientific conference (2012, July 07)

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See detailA layer of ozone detected in the nightside upper atmosphere of Venus
Montmessin, Franck; Bertaux, J.-L.; Lefèvre, F. et al

in Icarus: International Journal of Solar System Studies (2011)

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See detailLayer-by-layer self-assembled chitosan coating on electrospun nanofibers
Croisier, Florence ULg; Aqil, Abdelhafid ULg; Detrembleur, Christophe ULg et al

Poster (2009, April)

By combining electrospinning technique and layer-by-layer deposition, we produced a new material made of multilayered, chitosan-based nanofibers. Layer-by-layer (LBL) is a well-known method for surface ... [more ▼]

By combining electrospinning technique and layer-by-layer deposition, we produced a new material made of multilayered, chitosan-based nanofibers. Layer-by-layer (LBL) is a well-known method for surface coating, based on electrostatic interactions. It enables the controllable deposition of a variety of polyions including synthetic and natural materials, with designable layer structure, defined wall thickness and size. Electrospinning (ESP) technique allows the fabrication of polymer fibers ranging from nanometers to a few microns in diameter, depending on the polymer characteristics (a.o. molecular weight, solution viscosity and conductivity) and processing conditions (electric potential, distance between syringe-capillary and collection plate, concentration, flow rate). Mats of nanofibers produced by ESP display a very large surface area-to-volume ratio and high porosity with very small pore size. The nanometric scale of electrospun fibers also proves a positive effect on cellular growth, as fibers mats mimic extracellular matrix structure. The association of these two techniques with the use of biocompatible and biodegradable polymers such as chitosan, gives outstanding prospects in the field of biomedical applications, especially for the preparation of wound dressings, artificial skin or tissue engineering scaffolds. In the present study, a charged copolymer, poly(methylmethacrylate-block-methacrylic acid), was added to a poly(ε-caprolactone) or poly(D,L-lactide) solution before electrospinning in order to obtain charges on fibers surface. Oppositely charged polyelectrolytes – chitosan and poly(styrene sulfonate) or hyaluronic acid – were then alternately deposited on these aliphatic polyester fiber “cores” using LBL method. The aliphatic polyester core was also removed selectively to confirm the existence of a multilayered shell, obtaining hollow fibers. [less ▲]

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See detailLayered silicate/polyester nanohybrids by controlled ring-opening polymerization
Lepoittevin, Bénédicte; Pantoustier, Nadège; Alexandre, Michaël ULg et al

in Macromolecular Symposia (2002), 183

In this study, layered silicate/aliphatic polyester nanohybrids were synthesized by ring-opening polymerization of c-caprolactone as promoted by the so-called coordination-insertion mechanism. These ... [more ▼]

In this study, layered silicate/aliphatic polyester nanohybrids were synthesized by ring-opening polymerization of c-caprolactone as promoted by the so-called coordination-insertion mechanism. These nanocomposites were formed in presence of montmorillortite surface-modified by ammonium cations bearing hydroxyl group(s), such as bis(2-hydroxyethyl)methyl (hydrogenated tallow alkyl) ammonium. The lactone polymerization could in initiated by all the hydroxyl functions available at the clay surface, after activation into either tin(II) or AI(III) alkoxide active species. Hybrid nanocomposites were accordingly generated through the covalent grafting of every polyester chain onto the filler surface. Surface-grafted polycaprolactone (PCL) chains were untied and isolated by ionic exchange reaction with LiCl in THF solution and molar masses were measured by size exclusion chromatography. The PCL molar masses could be controlled and readily tuned by the content of hydroxyl groups available at the clay surface. Interestingly, initiation reaction by aluminum trialkoxide active species yielded grafted PCL chains characterized by very narrow molecular weight distribution (M-w/M(n)similar to1.2). These polyester-grafted layered silicate nanohybrids displayed complete exfoliation of silicate sheets as shown by X-ray diffraction (XRD) and transmission electron microscopy (TEM). [less ▲]

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See detailLayering of Size and Type Noun Constructions in English
Brems, Lieselotte ULg

Book published by Mouton de Gruyter - 1st (2011)

On the basis of synchronic and diachronic data analysis, the volume takes a close look at the synchronic layers of binominal size noun and type noun uses (a bunch/a load of X; a sort of X; a Y type of X ... [more ▼]

On the basis of synchronic and diachronic data analysis, the volume takes a close look at the synchronic layers of binominal size noun and type noun uses (a bunch/a load of X; a sort of X; a Y type of X) and reconsiders the framework of grammaticalization in view of issues raised by the phrases under discussion. As a result, a construction grammar-approach to grammaticalization is developed which does justice to the syntagmatic lexical, or collocational, reclustering observed in the data within an eclectic cognitive-functional approach. Prices subject to change. Shipping costs will be added. Current pricing is based [less ▲]

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See detailLayout Optimization : A Mathematical Programming Approach
Duysinx, Pierre ULg

Report (1997)

This paper presents applications of specially tailored methods of the mathematical programming approach for solving topology design problems formulated as an optimal material distribution, providing a way ... [more ▼]

This paper presents applications of specially tailored methods of the mathematical programming approach for solving topology design problems formulated as an optimal material distribution, providing a way to enlarge the scope of potential applications of topology optimization. The first feature of the methodology is to resort to dual maximization to solve optimization problems with a huge number of design variables, using the concept of Sequential Convex Programming (SCP). Here a central theme is the choice of convex approximations suited to the problems. First order approximations are firstly considered and compared. However, to increase the performances of the procedures (for example, to reduce the number of steps to arrive to a stationary design), a new approach to build un-expensive second approximation schemes, especially relevant for large scale problems, have been developed and validated. To illustrate the efficiency of the mathematical programming approach, the final part of the paper deals with an efficient treatment of perimeter constraints. Such constraints are essential to regularize material distribution with non optimal microstructures, but perimeter constraints are very difficult to handle in a numerical procedure for practical designs. The paper presents a solution to this problem that has been implemented and validated on a wide range of applications. [less ▲]

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See detailLayout Optimization : A Mathematical Programming Approach
Duysinx, Pierre ULg

Conference (1996, August)

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See detailLazy planning under uncertainty by optimizing decisions on an ensemble of incomplete disturbance trees
Defourny, Boris ULg; Ernst, Damien ULg; Wehenkel, Louis ULg

in Defourny, Boris; Ernst, Damien; Wehenkel, Louis (Eds.) Recent Advances in Reinforcement Learning (2008)

This paper addresses the problem of solving discrete-time optimal sequential decision making problems having a disturbance space W composed of a finite number of elements. In this context, the problem of ... [more ▼]

This paper addresses the problem of solving discrete-time optimal sequential decision making problems having a disturbance space W composed of a finite number of elements. In this context, the problem of finding from an initial state x0 an optimal decision strategy can be stated as an optimization problem which aims at finding an optimal combination of decisions attached to the nodes of a disturbance tree modeling all possible sequences of disturbances w0, w1, . . ., w(T−1) in W^T over the optimization horizon T. A significant drawback of this approach is that the resulting optimization problem has a search space which is the Cartesian product of O(|W|^(T−1)) decision spaces U, which makes the approach computationally impractical as soon as the optimization horizon grows, even if W has just a handful of elements. To circumvent this difficulty, we propose to exploit an ensemble of randomly generated incomplete disturbance trees of controlled complexity, to solve their induced optimization problems in parallel, and to combine their predictions at time t = 0 to obtain a (near-)optimal first-stage decision. Because this approach postpones the determination of the decisions for subsequent stages until additional information about the realization of the uncertain process becomes available, we call it lazy. Simulations carried out on a robot corridor navigation problem show that even for small incomplete trees, this approach can lead to near-optimal decisions. [less ▲]

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See detailLazy sensors for the scheduling of measurement samples transmission in linear closed loops over networks
Forni, Fulvio ULg; Galeani, Sergio; Nesic, Dragan et al

in 49th IEEE Conference on Decision and Control (cdc 2010) (2010)

We consider an exponentially stable close-loop interconnection of a continuous linear plant and a continuous linear controller, and we study the problem of interconnecting the plant output to the ... [more ▼]

We consider an exponentially stable close-loop interconnection of a continuous linear plant and a continuous linear controller, and we study the problem of interconnecting the plant output to the controller input through a network. We propose a family of "lazy sensors" whose goal is to transmit the measured plant output information as little as possible while preserving closed-loop stability. In particular, we propose three transmission policies, providing conditions on the transmission parameters. These guarantee global asymptotic stability when the plant state is available, and global practical stability when the plant state is not available. Simulation results confirm the effectiveness of the proposed strategies. [less ▲]

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