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See detailControllable morphology of flux avalanches in microstructured superconductors
Motta, M.; Colauto, F.; Vestgarden, J.I. et al

in Physical Review. B : Condensed Matter (2014)

The morphology of abrupt bursts of magnetic flux into superconducting films with engineered periodic pinning centers (antidots) has been investigated. Guided flux avalanches of thermomagnetic origin ... [more ▼]

The morphology of abrupt bursts of magnetic flux into superconducting films with engineered periodic pinning centers (antidots) has been investigated. Guided flux avalanches of thermomagnetic origin develop a tree-like structure, with the main trunk perpendicular to the borders of the sample, while secondary branches follow well-defi ned directions determined by the geometrical details of the underlying periodic pinning landscape. Strikingly, we demonstrate that in a superconductor with relatively weak random pinning, the morphology of such flux avalanches can be fully controlled by proper combinations of lattice symmetry and antidot geometry. Moreover, the resulting flux patterns can be reproduced, to the fi nest details, by simulations based on a phenomenological thermomagnetic model. In turn, this model can be used to predict such complex structures and to estimate physical variables of more di fficult experimental access, such as the local values of temperature and electric fi eld. [less ▲]

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See detailEosinophilic pulmonary diseases
Clercx, Cécile ULg; Peeters, Dominique ULg

in Bonagura, John; Twedt, David (Eds.) Kirk's Current Veterinary Therapy (2014)

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See detailComplex dynamics of a nonlinear aerospace structure: experimental identification and modal interactions
Noël, Jean-Philippe ULg; Renson, Ludovic ULg; Kerschen, Gaëtan ULg

in Journal of Sound & Vibration (2014), 333

Nonlinear system identification is a challenging task in view of the complexity and wide variety of nonlinear phenomena. The present paper addresses the identification of a real-life aerospace structure ... [more ▼]

Nonlinear system identification is a challenging task in view of the complexity and wide variety of nonlinear phenomena. The present paper addresses the identification of a real-life aerospace structure possessing a strongly nonlinear component with multiple mechanical stops. The complete identification procedure, from nonlinearity detection and characterization to parameter estimation, is carried out based upon experimental data. The combined use of various analysis techniques, such as the wavelet transform and the restoring force surface method, brings different perspectives to the dynamics. Specifically, the structure is shown to exhibit particularly interesting nonlinear behaviors, including jumps, modal interactions, force relaxation and chattering during impacts on the mechanical stops. [less ▲]

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See detailDe Gênes à Liège : implantation des annonciades célestes sur la Dorsale catholique
Henneau, Marie-Elisabeth ULg

in Deregnaucourt, Gilles; Krumenacker, Yves; Martin, Philippe (Eds.) et al La Dorsale catholique - jansénisme – dévotions : XVIe-XVIIIe siècles. Mythe, réalité, actualité historiographique (2014)

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See detailHedwig Margrethe Elisabeth von Ranzau
Henneau, Marie-Elisabeth ULg

E-print/Working paper (2014)

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See detailPlant selection for nest building by western lowland gorillas in Cameroon
Willie, Jacob; Tagg, Nikki; Petre, Charles-Albert ULg et al

in Primates : Journal of Primatology (2014)

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See detailComparative evaluation of existing and new methods for correcting ocular artifacts in electroencephalographic recordings
Kirkove, Murielle ULg; François, Clémentine ULg; Verly, Jacques ULg

in Signal Processing (2014), 98(C), 102-120

EEG signals are often contaminated by ocular artifacts (OAs), in particular when they are recorded for a subject that is, in principle, awake, such as in a study of drowsiness. It is generally desirable ... [more ▼]

EEG signals are often contaminated by ocular artifacts (OAs), in particular when they are recorded for a subject that is, in principle, awake, such as in a study of drowsiness. It is generally desirable to detect and/or correct these OAs before interpreting the EEG signals. We have identified 11 existing methods for dealing with OAs. Their study allowed us to create 16 new methods. We performed a comparative performance evaluation of the resulting 27 distinct methods using a common set of data and a common set of metrics. The data was recorded during a driving task of about two hours in a driving simulator. This led to a ranking of all methods, with five emerging clear winners, comprising two existing methods and three new ones. [less ▲]

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See detailGuerre et jeu. Cultures d'un paradoxe à l'ère moderne
Küpper, Achim ULg; Vanden Berghe, Kristine ULg

Book published by Presses Universitaires François-Rabelais (2014)

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See detailSimultaneous determination of some phthalate metabolites, parabens and benzophenone-3 in urine by ultra high pressure liquid chromatography tandem mass spectrometry
Dewalque, Lucas ULg; PIRARD, Catherine ULg; DUBOIS, Nathalie ULg et al

in Journal of Chromatography. B : Analytical Technologies in the Biomedical & Life Sciences (2014), 949-950

Phthalates, parabens and 2-hydroxy-4-methoxybenzophenone or benzophone-3 are thought to act as endocrine disrupting chemicals, being able to disrupt the endocrine balance and therefore able to lead to ... [more ▼]

Phthalates, parabens and 2-hydroxy-4-methoxybenzophenone or benzophone-3 are thought to act as endocrine disrupting chemicals, being able to disrupt the endocrine balance and therefore able to lead to some hormonal diseases. Numerous large-scale biomonitoring studies have detected the biomarkers of these compounds in more than 75% of the general population. To assess the exposure to these chemicals, we developed an analytical method based on a Solid Phase Extraction (SPE) prior to ultra high pressure liquid chromatographytandem mass spectrometry (UPLC-MS/MS) for the simultaneous measurement of seven phthalate metabolites (monobenzyl phthalate, mono-n-butyl phthalate, mono-iso-butyl phthalate, mono-2-ethylhexyl phthalate, mono-2-ethyl-5-hydroxyhexyl phthalate, mono-2- ethyl-5-oxohexyl phthalate, monoethyl phthalate), four parabens (methyl paraben, ethyl paraben, n-propyl paraben, n-butyl parabens) and benzophenone-3 in human urine. The distinction between unconjugated, glucuro- and sulfoconjugated forms was achieved using different enzymatic hydrolyses. The whole procedure was validated according to the total error approach, and was demonstrated to be linear (regression coefficient ranging from 0.987 to 0.998) and accurate (inter and intra assay precision <17.71%, relative bias <5.87%) in the dosing range of concentrations. The limits of quantification (LOQs) obtained ranged between 0.30 and 1.23 ng/ml depending on the analyte. The reliability of the method was proven in passing successfully the German External Quality Assessment Scheme (G-EQUAS). Moreover, the urine from 25 volunteers were analyzed for the determination of glucuro-, sulfo- and free species separately. Phthalate metabolites, parabens and benzophenone-3 were positively detected in almost all urine samples, with detection rates ranging from 40 to 100%. Levels measured ranged from <LOQ to 2207 ng/ml varying widely depending on the compound and the individual. In our small participating population, most of the phthalate metabolites were excreted predominately as glucuroconjugated forms while parabens and benzophenone-3 were detected as glucuro- and sulfoconjugated species in variable proportions according to the target compound. [less ▲]

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See detailThe Benefits of Errorless Learning for Serial Reaction Time Performance in Alzheimer's Disease.
Schmitz, Xavier ULg; Bier, Nathalie; Joubert, Sven et al

in Journal of Alzheimer's Disease [=JAD] (2014), 39(2), 287-300

Identifying the conditions favoring new procedural skill learning in Alzheimer’s disease (AD) could be important for patients’ autonomy. It has been suggested that error elimination is beneficial during ... [more ▼]

Identifying the conditions favoring new procedural skill learning in Alzheimer’s disease (AD) could be important for patients’ autonomy. It has been suggested that error elimination is beneficial during skill learning, but no study has explored the advantage of this method in sequential learning situations. In this study, we examined the acquisition of a 6-element perceptual-motor sequence by AD patients and healthy older adults (control group). We compared the impact of two preliminary sequence learning conditions (Errorless vs. Errorful) on Serial Reaction Time performance at two different points in the learning process. A significant difference in reaction times for the learned sequence and a new sequence was observed in both conditions in healthy older participants; in AD patients, the difference was significant only in the errorless condition. The learning effect was greater in the errorless than the errorful condition in both groups. However, while the errorless advantage was found at two different times in the learning process in the AD group, in the control group this advantage was observed only at the halfway point. These results support the hypothesis that errorless learning allows for faster automation of a procedure than errorful learning in both AD and healthy older subjects. [less ▲]

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See detailTransfer across the air-sea interface
Garbe; Rutgersson, Anna; Boutin, Jacqueline et al

in Liss, Peter; Johnson, Martin (Eds.) Ocean-Atmosphere Interactions of Gases and Particles (2014)

The efficiency of transfer of gases and particles across the air-sea interface is controlled by several physical, biological and chemical processes in the atmosphere and water which are described here ... [more ▼]

The efficiency of transfer of gases and particles across the air-sea interface is controlled by several physical, biological and chemical processes in the atmosphere and water which are described here (including waves, large- and small-scale turbulence, bubbles, sea spray, rain and surface films). For a deeper understanding of relevant transport mechanisms, several models have been developed, ranging from conceptual models to numerical models. Most frequently the transfer is described by various functional dependencies of the wind speed, but more detailed descriptions need additional information. The study of gas transfer mechanisms uses a variety of experimental methods ranging from laboratory studies to carbon budgets, mass balance methods, micrometeorological techniques and thermographic techniques. Different methods resolve the transfer at different scales of time and space; this is important to take into account when comparing different results. Air-sea transfer is relevant in a wide range of applications, for example, local and regional fluxes, global models, remote sensing and computations of global inventories. The sensitivity of global models to the description of transfer velocity is limited; it is however likely that the formulations are more important when the resolution increases and other processes in models are improved. For global flux estimates using inventories or remote sensing products the accuracy of the transfer formulation as well as the accuracy of the wind field is crucial. [less ▲]

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See detailLe choix du liégeois. Dîmègne de Louis Remacle
Baiwir, Esther ULg; Biquet, Stéphanie ULg

in Baiwir, Esther; Biquet, Stéphanie (Eds.) Petite anthologie subjective de littérature wallonne (2014)

Lecture et commentaire du seul poème en liégeois de Louis Remacle, "Dîmègne".

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See detailAn assessment of cross-listed firms’ diversification potential
Mouchette, Xavier ULg; Muller, Aline ULg

E-print/Working paper (2014)

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See detailL'insularisation comme mode de transition, le cas de l'agriculture de conservation en Région Wallonne
Vankeerberghen, Audrey ULg; Dannevoye, Bastien ULg; Stassart, Pierre M ULg

in de Raymond, Antoine; Goulet, Frédéric (Eds.) Les métamorphoses du productivisme agricole. Pour une sociologie des grandes cultures (2014)

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See detailIs dolphin morbillivirus virulent for white-beaked dolphins (Lagenorhynchus albirostris)?
van Elk, N.; van de Bildt, M.; Jauniaux, Thierry ULg et al

in Veterinary Pathology (2014)

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See detailInteractions of subunits Asa2, Asa4 and Asa7 in the peripheral stalk of the mitochondrial ATP synthase of the chlorophycean alga Polytomella sp.
Miranda-Astudillo, Hector; Cano-Estrada, Araceli; Vazquez-Acevedo, Miriam et al

in Biochimica et Biophysica Acta-Bioenergetics (2014), 1837

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See detailVol vaderlands leven en volksgezind streven: Het Kinkergenootschap te Luik (1886-ca. 1913)
Steyaert, Kris ULg

in Negentiende Eeuw (2014)

The Kinker Association was founded in 1886 for the benefit of the many Dutch-speaking Flemings living and working in francophone Liège. Organizing lectures on a variety of subjects, the Association ... [more ▼]

The Kinker Association was founded in 1886 for the benefit of the many Dutch-speaking Flemings living and working in francophone Liège. Organizing lectures on a variety of subjects, the Association attempted to exert an emancipatory influence. Not only did it set up an extensive Dutch library but it also provided access to medical care and insurance. Above all, the Kinker Association wanted to boost the presence of Dutch-related cultural activities in the city. With its liberal sympathies and close links to the Willems Fonds, the Association met with opposition from various quarters, not least from the Catholic Church. This article looks in detail at the genesis, and rise and fall of the Association, its membership and its place and appeal within the wider socio-cultural context of late-nineteenth-century Wallonia. [less ▲]

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