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See detailIndustrial applications of extended output-only Blind Source Separation techniques
Rutten, Christophe ULg; Nguyen, Viet Ha; Golinval, Jean-Claude ULg

in Vibration Problems Icovp 2011: The 10th International Conference on Vibration Problems (2011)

In the field of structural health monitoring or machine condition moni-toring, most vibration based methods reported in the literature require to measure responses at several locations on the structure ... [more ▼]

In the field of structural health monitoring or machine condition moni-toring, most vibration based methods reported in the literature require to measure responses at several locations on the structure. In machine condition monitoring, the number of available vibration sensors is often small and it is not unusual that only one single sensor is used to monitor a machine. This paper presents industrial applications of two possible extensions of output-only Blind Source Separation (BSS) techniques, namely Principal Component Analysis (PCA) and Second Order Blind Identification (SOBI). Through the use of block Hankel matrices, these methods may be used when a reduced set of sensors or even one single sensor is available. The objective is to address the problem of fault detection in mechanical systems using subspace-based methods. The detection is achieved by comparing the subspace features between the reference and a current state using the concept of angular coherence between subspaces. [less ▲]

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See detailComprendre les femmes au foyer, des intermittentes du travail ? « Comprendre les femmes au foyer, des intermittentes du travail ? »
Dieu, Anne Marie; Cornet, Annie ULg; Delhaye, Christine

in Revue Internationale de Psychosociologie (2011), XVII(43), 261-281

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See detailDiversité culturelle, affrontements communautaires et compromis politiques à l'épreuve de la mondialisation. Tentative d'explication du blocage belge de 2007 à 2010.
Verjans, Pierre ULg

in Communautés et Sociétés. Annales de sociologie et d'anthropologie. (2011), 21-22

Created in 1830, based on the Nation-State model, Belgium was managed till 1893 by a francophone elite, who did not listen the claims of cultural diversity acknowledgement. However, this cultural ... [more ▼]

Created in 1830, based on the Nation-State model, Belgium was managed till 1893 by a francophone elite, who did not listen the claims of cultural diversity acknowledgement. However, this cultural diversity had been endorsed for a millennium and a half. The rise of power of the Flemish movement since the 1960s illustrates the various faces of globalization : backlash of the decolonization, emergence of a post-industrial economy, Europeanization and Atlantization of public policies raise a requestionning the legitimacy of the unitarian Nation-State. The failure of community negotiations since 2007 and the resulting political deadlock illustrates the priority granted again to the question of cultural diversity in Belgium, after fifteen years of lull. [less ▲]

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See detailNew indications for radiotherapy: primary liver cancer and secondary liver oligometastases
JANVARY, Zsolt Levente ULg; JANSEN, Nicolas ULg; MARTINIVE, Philippe ULg et al

in Belgian Journal of Medical Oncology [=BJMO] (2011), 5(1), 8-13

Surgery is considered to be the standard treatment for intrahepatic malignancies, primary <br />cancers and metastatic lesions. However, a great many patients are not eligible for surgical <br ... [more ▼]

Surgery is considered to be the standard treatment for intrahepatic malignancies, primary <br />cancers and metastatic lesions. However, a great many patients are not eligible for surgical <br />intervention. Modern stereotactic radiotherapy has the potential to be an effective alternative <br />treatment modality with low toxicity for patients with primary hepatocellular carcinoma <br />and liver oligometastases. In this paper we intend to review the current status and published <br />experiences in the field of liver irradiation. [less ▲]

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See detailSexual differentiation of sexual behavior and its orientation.
Roselli, Charles; Balthazart, Jacques ULg

in Frontiers in Neuroendocrinology (2011), 32(2), 109

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See detailSyncesia mascarena (Roccellaceae) a new species from La Réunion (Indian Ocean)
van den Boom, Pieter; Ertz, Damien; Brand, Maarten et al

in Opuscula Philolichenum (2011), 9

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See detailRetrouver à qui parler ?
Dumortier, Jean-Louis ULg

in Lettre de l'AIRDF (2011), 50

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See detailPolymer design by organometallic-mediated radical polymerization (OMRP)
Debuigne, Antoine ULg; Jérôme, Christine ULg; Detrembleur, Christophe ULg

in Polymer Preprints of Japan (2011), 60(2), 2565-2567

Transition metal-assisted polymerization techniques have always played a crucial role in polymer synthesis. As an illustration, metallic compounds have deeply marked the field of living/controlled radical ... [more ▼]

Transition metal-assisted polymerization techniques have always played a crucial role in polymer synthesis. As an illustration, metallic compounds have deeply marked the field of living/controlled radical polymerization (L/CRP) which gives access to well-defined polymers under non drastic conditions. Indeed, atom transfer radical polymerization (ATRP) is one of the most successful methods to polymerize vinyl monomers in a controlled manner. Besides this very successful system, another metal-assisted CRP technique is emerging, i.e. organometallic-mediated radical polymerization (OMRP). In contrast to ATRP, OMRP involves the reversible formation of a covalent bond between a transition metal and the polymer chains, which strongly decreases the extent of termination reactions and leads to polymers with predictable molecular weights. This lecture aims to provide a comprehensive overview of the synthetic and mechanistic aspects of OMRP as well as major achievements and remaining challenges in this field. [less ▲]

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See detailEffect of ageing on different egg yolk fractions on surface properties at the air–water interface
Freschi, Jérôme ULg; Razafindralambo, Hary ULg; Danthine, Sabine ULg et al

in International Journal of Food Science & Technology (2011), 46

The aim of this study was to evaluate the impact of egg ageing on the surface properties of whole and fractionated yolk at the air–water interface. Eggs were stored at 4 Cfor 24 h, 1 week and 3 weeks ... [more ▼]

The aim of this study was to evaluate the impact of egg ageing on the surface properties of whole and fractionated yolk at the air–water interface. Eggs were stored at 4 Cfor 24 h, 1 week and 3 weeks after laying.A laboratory scale fractionation process was then applied at each ageing time. Egg yolk was separated into two fractions, plasma composed of low-density lipoproteins (LDLs) and livetins, and granules formed by highdensity lipoproteins (HDLs), phosvitins and LDLg (g = granule). Moreover, recombined plasma and granules fractions were investigated to highlight a potential synergic effect on surface properties. Results have shown the main contribution of LDLs on surface properties of yolk and an improvement of granules surface properties when they are disrupted. Moreover, ageing affected surface properties differently depending on the considered fractions. Broken LDLsand disrupted granules could explain this observed behaviour. Recombined fractions showed different compression isotherms at the air–water interface than whole yolk. [less ▲]

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See detailRandom matrix models for phase diagrams
Vanderheyden, Benoît ULg; Jackson, A. D.

in Reports on Progress in Physics (2011), 74

We describe a random matrix approach that can provide generic and readily soluble mean-field descriptions of the phase diagram for a variety of systems ranging from QCD to high-T_c materials. Instead of ... [more ▼]

We describe a random matrix approach that can provide generic and readily soluble mean-field descriptions of the phase diagram for a variety of systems ranging from QCD to high-T_c materials. Instead of working from specific models, phase diagrams are constructed by averaging over the ensemble of theories that possesses the relevant symmetries of the problem. Although approximate in nature, this approach has a number of advantages. First, it can be useful in distinguishing generic features from model-dependent details. Second, it can help in understanding the `minimal' number of symmetry constraints required to reproduce specific phase structures. Third, the robustness of predictions can be checked with respect to variations in the detailed description of the interactions. Finally, near critical points, random matrix models bear strong similarities to Ginsburg-Landau theories with the advantage of additional constraints inherited from the symmetries of the underlying interaction. These constraints can be helpful in ruling out certain topologies in the phase diagram. In this Key Issue, we illustrate the basic structure of random matrix models, discuss their strengths and weaknesses, and consider the kinds of system to which they can be applied. [less ▲]

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See detailFacing up to the imperceptible perspiration. Modulatory influences by diabetic neuropathy, physical exercise and antiperspirant.
Xhauflaire-Uhoda, E.; Mayeux, G.; Quatresooz, Pascale ULg et al

in Skin Research & Technology (2011)

Background: Sweating is variably altered by physical exercise, diabetic neuropathy and antiperspirants. Methods: Skin temperature, skin surface water loss (SSWL), the Corneometer((R)) average capacitance ... [more ▼]

Background: Sweating is variably altered by physical exercise, diabetic neuropathy and antiperspirants. Methods: Skin temperature, skin surface water loss (SSWL), the Corneometer((R)) average capacitance (CMAC) and skin capacitance mapping (SCM) were measured before and after moderate physical exercise in 20 healthy subjects. The effect of 5% aluminium chloride hexahydrate (ACH) in a water solution was similarly tested. The same assessments were performed in 20 diabetic patients at rest. Results: Diabetic neuropathy appeared at rest as an increased (compensatory) SCM on the forearms without obvious modification on the hypohidrotic legs. On ACH sites after exercise, SCM revealed both a lowered number of active sweat glands and a lighter stratum corneum (SC) (dryness). In addition, CMAC and SSWL were decreased on ACH sites at rest and at completion of exercise. Conclusion: In diabetic neuropathy, the compensatory hyperhidrosis is more easily disclosed than the hypohidrosis. ACH affects both sweat excretion and the SC hydration. [less ▲]

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See detailA propos du P. Ambras
Winand, Jean ULg

in Chronique d'Egypte : Bulletin Périodique de la Fondation Egyptologique Reine Elisabeth (2011), 86

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See detailEnergy dissipation on a stepped spillway downstream of a Piano Key Weir - Experimental study
Erpicum, Sébastien ULg; Daux, Christophe; Machiels, Olivier ULg et al

in Erpicum, Sébastien; Laugier, Frederic; Boillat, Jean Louis (Eds.) et al Labyrinth and Piano Key Weirs - PKW 2011 (2011)

Piano Key Weir (PKW) is a new type of weir showing appealing hydraulic capacities. Its specific geometric features create different interacting flows and jets downstream of the structure. This suggests ... [more ▼]

Piano Key Weir (PKW) is a new type of weir showing appealing hydraulic capacities. Its specific geometric features create different interacting flows and jets downstream of the structure. This suggests that the use of a PKW to control the flow upstream of a stepped spillway may help in enhancing energy dissipation on the downstream channel. The first results of an experimental study carried out at the Laboratory of Engineering Hydraulics – HACH in the scope of a Coyne & Bellier – Tractebel Engineering project are presented in the paper. The goal of the study was to compare the energy dissipation on a stepped spillway downstream of a PKW with the one which takes place on the same spillway equipped with a standard ogee-crested weir. Despite similar global energy dissipation rates whatever the weir type due to the relative important height of the spillway, significant differences in the aeration of the flow along the spillway have been shown. This paves the way to further investigations. [less ▲]

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See detailProthèse fixée implanto-portée
LAMY, Marc ULg

in Postaire, Michel (Ed.) Les dernières dents... Garder ou extraire. Solutions cliniques (2011)

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