References of "2011"
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See detailLève-toi et entreprends !...
Choffray, Jean-Marie ULg

E-print/Working paper (2011)

Quelques pistes de réflexion pour faire face, avec solidarité, créativité, intelligence, et détermination, aux défis humains et économiques que pose la reconversion industrielle d'ArcelorMittal.

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See detailRelaxation schemes for min max generalization in deterministic batch mode reinforcement learning
Fonteneau, Raphaël ULg; Ernst, Damien ULg; Boigelot, Bernard ULg et al

in 4th International NIPS Workshop on Optimization for Machine Learning (OPT 2011) (2011, December)

We study the min max optimization problem introduced in [Fonteneau, 2011] for computing policies for batch mode reinforcement learning in a deterministic setting. This problem is NP-hard. We focus on the ... [more ▼]

We study the min max optimization problem introduced in [Fonteneau, 2011] for computing policies for batch mode reinforcement learning in a deterministic setting. This problem is NP-hard. We focus on the two-stage case for which we provide two relaxation schemes. The first relaxation scheme works by dropping some constraints in order to obtain a problem that is solvable in polynomial time. The second relaxation scheme, based on a Lagrangian relaxation where all constraints are dualized, leads to a conic quadratic programming problem. Both relaxation schemes are shown to provide better results than those given in [Fonteneau, 2011]. [less ▲]

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See detailInfluence of Particle Packing on Fracture Properties of Concrete
He, Huan ULg; Stroeven, Piet; Stroeven, Martijn et al

in Computers and Concrete (2011), 8(6), 677-692

Particle packing on meso-level has a significant influence on workability of fresh concrete and also on the mechanical and durability properties of the matured material. It was demonstrated earlier that ... [more ▼]

Particle packing on meso-level has a significant influence on workability of fresh concrete and also on the mechanical and durability properties of the matured material. It was demonstrated earlier that shape exerts but a marginal influence on the elastic properties of concrete provided being packed to the same density, which is not necessarily the case with different types of aggregate. Hence, elastic properties of concrete can be treated as approximately structure-insensitive parameters. However, fracture behaviour can be expected structure-sensitive. This is supported by the present study based on discrete element method (DEM) simulated three-phase concrete, namely aggregate, matrix and interfacial transition zones (ITZs). Fracture properties are assessed with the aid of a finite element method (FEM) based on the damage materials model. Effects on tensile strength due to grain shape and packing density are investigated. Shape differences are shown to have only modest influence. Significant effects are exerted by packing density and physical-mechanical properties of the phases, whereby the ITZ takes up a major position. [less ▲]

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See detailClinical characterization of cabergoline resistant prolactinomas : a multicenter experience on 92 patients
VROONEN, Laurent ULg; Jaffrain-Rea, M. L.; PETROSSIANS, Patrick ULg et al

in ENEA Munich - abstract book (2011, December)

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See detailDetection of wrong analysis with Diva
Troupin, Charles ULg

Report (2011)

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See detailLe médicament du mois, SEVIKAR/HCT° : association d'un antagoniste calcique (bésylate d'amlodipine), d'un inhibiteur des récepteurs de l'angiotensine II (olmésartan médoxomil) et d'un diurétique thiazide (hydrochlorothiazide)
Krzesinski, Jean-Marie ULg

in Revue Médicale de Liège (2011), 66(12), 636-642

Hypertension is a common treatable risk factor for cardiovascular disease. Even when identified and treated, most patients with hypertension do not reach the blood pressure goal and they often need in ... [more ▼]

Hypertension is a common treatable risk factor for cardiovascular disease. Even when identified and treated, most patients with hypertension do not reach the blood pressure goal and they often need in fact three antihypertensive agents to achieve blood pressure control. Although various combinations of two therapies are currently available for the treatment of hypertension, development of more powerful therapies with 3 molecules is necessary to control more hypertensive patients. Amlodipine/Olmesartan/hydrochlorothiazide (Sevikar/HCT°) is a new triple combination of antihypertensive agents that lower blood pressure via calcium channel blockade, angiotensin receptor blockade and diuretic action. Its potent triple mechanism of action is also likely to attenuate compound-specific adverse events, such as amlodipine-related peripheral oedema or sartan-induced hyperkalemia. Moreover, by reducing the number of pills to be taken every day, the compliance should be better. Currently available data show that such a combination is very powerful and well-tolerated allowing more patients with all grades of hypertension (especially those with the most severe forms) to reach the blood pressure target. The contraindications are those of each compound. [less ▲]

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See detailDynamique forestière et enrichissements forestiers. Site de Mbang. Rapport n° 7.
Doucet, Jean-Louis ULg; Amandé, Jean; Essik, Jean-Marie et al

Report (2011)

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See detailUtilisation des composts de biodéchets ménagers pour l'amélioration de la fertilité des sols acides de la province de Kinshasa (République Démocratique du Congo)
Mulaji Kyela, Crispin ULg

Doctoral thesis (2011)

This work is part of the research for appropriate methods for sustainable management of the sandy soils of the province of Kinshasa (Democratic Republic of Congo), in order to ensure and guarantee the ... [more ▼]

This work is part of the research for appropriate methods for sustainable management of the sandy soils of the province of Kinshasa (Democratic Republic of Congo), in order to ensure and guarantee the adequate food security. It consists of a scientic research of the use of composts produced from household organic waste in improving the quality of sandy soils to the province of Kinshasa. The general objective pursued in this work is to evaluate the impact of four repeated applications of organic matter from bio-waste compost on chemical and biochemical parameters dynamics in acid sandy soils and their productivity. A pilot composting on a small scale has been installed for the production of composts from municipal solid waste and characterization of composts obtained has revealed the agronomic potential that presents this material. The diagnosis of the condition agropedological soils revealed that soils of the three study sites are sandy classified as rubics arenoferrasols (dystrics), have excellent physical conditions for drainage, air circulation and root penetration possess variables charges colloids, show an acid reaction, low organic matter and low nutrient minerals contents. In addition, their water and nutrients retentions capacity are very limited, and are the main soil constraints to agricultural productivity of these soils. After four growing seasons in real environments, the study of the reaction with the soil organic amendments (20, 40, 60 t.ha-1 MB) gave satisfactory results. The provision of continuous additions of organic composts significantly increased the values of pH, TOC, CEC, SB eff and reduced the rate of exchangeable Al saturation in the three sites. With the highest dose T3 (60 t.ha-1 MB), the pH increased at least 0.8 units and the carbon content multiplied by 2.5 to 3 on the three sites. CEC values increased from 3.3 to 5.02 cmol(+)mg.kg-1 and the toxic aluminum saturation decreased more effective than 90%. Regarding biochemical parameters (microbial carbon & nitrogen, RB, RIS, APA, Unt, Ut), compost treatments induced a significant improvement in function and doses applied throughout the experiment. These contributions have induced microbial activity which contributed to the increase in soil nutrients (N, P, ...) by microbiological activities. The availability of nutrients and fourniture of carbon by the composts explain these increases. In addition, yields on different test plants (Glycine max L. Merr, Arachis hypogaea L. and Hibiscus sabbariffa L.) were positively influenced by the treatments of organic composts household wastes. Compared with mineral fertilizers, their fertilizing potential is not negligible. According to the results observed, doses ≥ 40 t.ha MB-1 should be to keep and maintain an acceptable level of fertility and yields potentiel of crops. But low doses were more efficient than high doses of agronomic point of view. Doses ≤ 20 t.ha-1 MB are recommended in annual crop and regular. Phosphorus was found to be the most limiting element to agricultural production of soil sites studied whatever of the types of amendments and cultures used. Finally, the study indicates that for reasons of efficiency, availability and funds increased production may be obtained through synergy between the composts used in small quantities and fertilizer mineral supplements. [less ▲]

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See detailEvidence on the Determinants of Innovation in a Sample of Spanish firms
Artige, Lionel ULg

E-print/Working paper (2011)

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See detailOne-dimensional time-dependent model of cardiac pacemaker activity generated by mechano-electric feedback in a thermo-electro-mechanical context
Collet, Arnaud ULg; Dauby, Pierre ULg

in Archives des Maladies du Coeur et des Vaisseaux. Pratique (2011, December), (Hors-série 3), 20

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See detailThe Economic and Statistical Designs of Control charts for Censored and Non-Normal Data
Faraz, Alireza ULg; Heuchenne, Cédric ULg; Davis, Darwin, Edward et al

Scientific conference (2011, December)

In this research, we are dealing with constructing the statistical design (SD) and economic statistical design (ESD) of Shewhart and CUSUM control charts for reliability data which are right censored ... [more ▼]

In this research, we are dealing with constructing the statistical design (SD) and economic statistical design (ESD) of Shewhart and CUSUM control charts for reliability data which are right censored. This is the case which happens more frequently in the field. [less ▲]

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See detailCybercontestation tunisienne
Lecomte, Romain ULg

Article for general public (2011)

Les récents soulèvements arabes ont conduit nombre de journalistes et experts à se focaliser sur le rôle décisif d'Internet dans les mobilisations. Autant les usages contestataires d'Internet dans le ... [more ▼]

Les récents soulèvements arabes ont conduit nombre de journalistes et experts à se focaliser sur le rôle décisif d'Internet dans les mobilisations. Autant les usages contestataires d'Internet dans le monde arabe étaient jusque là largement ignorés, par les médias traditionnels (occidentaux ou non) mais aussi par le monde académique, autant désormais on observe une surenchère sur le rôle révolutionnaire des médias sociaux, souvent agrémentés de titres accrocheurs : « Révolution 2.0. », « Révolution Facebook », « Cyber-révolution »... À partir d'une recherche de doctorat portant sur les usages citoyens et contestataires d'Internet par les Tunisiens, je souhaiterais ici apporter un éclairage plus nuancé sur le rôle d'Internet dans ce petit pays du Maghreb où le « printemps arabe » est né, en prenant en considération à la fois son importance et ses limites. Je commencerai par poser le contexte contraignant dans lequel les internautes tunisiens devaient évoluer sous le régime de Ben Ali. Ensuite, je retracerai l'évolution des usages citoyens et contestataires d'Internet depuis la fin des années 90 jusqu'à aujourd'hui. Enfin, à la lumière de cette courte mais déjà riche histoire, je proposerai quelques éléments d'analyse du rôle d'Internet dans la conjoncture critique de décembre 2010-janvier 2011 en Tunisie. [less ▲]

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See detailSynergistic interaction of the triple combination of amphotericin B, ciprofloxacin, and polymorphonuclear neutrophils against Aspergillus fumigatus.
STERGIOPOULOU, Theodouli ULg; Meletiadis, Joseph; Sein, Tin et al

in Antimicrobial Agents and Chemotherapy (2011), 55(12), 5923-9

Aspergillus is damaged by polymorphonuclear neutrophils (PMNs) by means of nonoxidative and oxidative mechanisms, which may be affected by antifungal and antibacterial agents that patients with invasive ... [more ▼]

Aspergillus is damaged by polymorphonuclear neutrophils (PMNs) by means of nonoxidative and oxidative mechanisms, which may be affected by antifungal and antibacterial agents that patients with invasive pulmonary aspergillosis often receive. The pharmacodynamic interactions among deoxycholate amphotericin B (AMB), ciprofloxacin (CIP), and human PMNs against Aspergillus fumigatus growth are unknown. We therefore studied the interactions between 0.032 to 2.0 mug/ml of AMB, 0.1 to 50 mug/ml of CIP at a fixed AMB/CIP ratio of 1:3.125, and PMNs from six donors at an effector-to-target (E:T) ratio of 400:1 against a clinical A. fumigatus isolate using an XTT metabolic assay and the Bliss independence pharmacodynamic-interaction model. CIP exhibited no antifungal activity alone or in combination with PMNs. Synergy was found between AMB and PMNs, with interaction indices (II) of 0.06 to 0.21; the highest interaction of 21% +/- 3.6% was observed at 0.22 +/- 0.09 mug/ml of AMB. The AMB and CIP (AMB+CIP) combination was synergistic (II = 0.39) at low AMB concentrations and antagonistic (II = 1.39) at high AMB concentrations, with a maximal synergistic interaction of 16% +/- 3.7% observed at 0.16 +/- 0.08 mug/ml of AMB. The triple combination AMB+CIP+PMNs was synergistic, with interaction indices of 0.05 to 0.20, and a maximal synergistic interaction of 24% +/- 4% was observed at 0.20 +/- 0.07 mug/ml of AMB. The increased percentage of Bliss synergy of the triple combination AMB+CIP+PMNs (24% +/- 4%) was the product of those of the constituent double combinations AMB+PMNs (21% +/- 3.6%) and AMB+CIP (16% +/- 3.7%). Thus, the antifungal activity of AMB, at clinically relevant concentrations, was enhanced in combination with PMNs and CIP against A. fumigatus growth in a concentration-dependent manner. [less ▲]

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See detailIntegration of quality indices of distribution in benchmarking analysis
Coelli, Tim; Gautier, Axel ULg; Perelman, Sergio ULg et al

Report (2011)

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See detailThe Future of Public Enterprises: Contributions to a new Discourse
Fecher-Bourgeois, Fabienne ULg; Florio, Massimo

in Annals of Public and Cooperative Economics = Annales de l'Economie Publique, Sociale et Coopérative (2011), 82(4), 361-373

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See detailAURALIAS: an audio-immersive system for auralizing room acoustics projects
Embrechts, Jean-Jacques ULg

Conference (2011, December)

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See detailPure species of grass discrimination with the help of hyperspectral imaging NIR
Dale, Laura ULg; Rotar, Ioan; Bogdan, Anca Dorina et al

in Agronomy Series of Scientific Research = Lucrari Stiintifice Seria Agronomie (2011, December), 54(2), 23-27

The possibilities to discriminate with hyperspectral imaging system, SWIR ImSpector N25E in grass mixtures of the pure species Festuca rubra L., Trifolium repens L., Agrostis capillaris L., Hieracium ... [more ▼]

The possibilities to discriminate with hyperspectral imaging system, SWIR ImSpector N25E in grass mixtures of the pure species Festuca rubra L., Trifolium repens L., Agrostis capillaris L., Hieracium aurantiacum L., Arnica montana L.was the objective of this study. All the samples were collected from natural meadows, from the National Apuseni Park, Apuseni Mountains, from Gârda area. The samples were naturally dried then prepared using the protocol for NIRS analyze. The model built with PLS–DA, was used to demonstrate wether the classes discrimination between pure species is possible or not. The goal of this study was to see in other images if the pure species are or are not recognized according to the spectral data base. The potential of using the Hyperspectral Imaging NIR (Camera NIR) to discriminate or to identify pure species was confirmed. For this technique the MatLab program was used .A percentage of more than 96% correct prediction for species discrimination was obtained. This study should drive to a more important point, which is to verify whether the toxic species are or are not used as food for animals in the natural meadows. The floristic composition of a meadow can be determined only if we have in the data base, dates for each identified species, as being part of the mix. [less ▲]

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See detailLa liaison externe en gériatrie : état des lieux de la collaboration entre médecins généralistes et gériatres
Ketterer, Frédéric ULg; Goffin, Yves; Garroi, Ludivine et al

Report (2011)

L’objet de l’étude présentée ici consistait à voir comment la collaboration entre médecins généralistes et gériatres peut être conçue autour de la personne âgée, pour maintenir cette dernière dans son ... [more ▼]

L’objet de l’étude présentée ici consistait à voir comment la collaboration entre médecins généralistes et gériatres peut être conçue autour de la personne âgée, pour maintenir cette dernière dans son milieu de vie. Il y est question d’avoir un référent spécialiste lorsque la dimension gériatrique de la prise en charge s’exprime avec acuité. Dès lors, l’étude cherchait à cerner comment les médecins généralistes conçoivent cette collaboration avec les gériatres pour leurs patients âgés à domicile et en maison de repos, quels sont les atouts et contraintes de la première ligne de soins, ainsi que les pistes sur lesquelles s’appuyer pour concevoir une collaboration efficace et efficiente. [less ▲]

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