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See detailMontrer, calculer, explorer, analyser. Ce que l'informatique fait (faire) à l'analyse qualitative
Lejeune, Christophe ULg

in Recherches Qualitatives (2010), 9

Au delà de ses implications techniques, l'informatisation de l'analyse de texte soulève des questions de méthode. Après un recensement des motivations à recourir à des logiciels pour assister l'analyse de ... [more ▼]

Au delà de ses implications techniques, l'informatisation de l'analyse de texte soulève des questions de méthode. Après un recensement des motivations à recourir à des logiciels pour assister l'analyse de données textuelles, nous proposons une typologie distinguant cinq fonctionnalités proposées par ces outils : la lexicométrie, les concordances, les automates, les outils réflexifs et les dictionnaires. Chacune de ces fonctionnalités éclaire les textes d'une manière originale (et partielle). Rapportée à ses usages attestés, chacune de ces potentialités articule des présupposés épistémologiques spécifiques. En définitive, le choix d'un logiciel caractérise autant une démarche de recherche que l'inscription dans un paradigme. [less ▲]

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See detailAssociation between frontal EEG asymmetries and emotional intelligence among adults
Mikolajczak, Moïra; Bodarwé, Kerrin; Laloyaux, Olivier et al

in Personality & Individual Differences (2010), 48(2), 177-181

This study aimed at investigating the brain correlates of trait emotional intelligence. Trait emotional intelligence (trait EI) is a constellation of emotion-related traits, capturing the extent to which ... [more ▼]

This study aimed at investigating the brain correlates of trait emotional intelligence. Trait emotional intelligence (trait EI) is a constellation of emotion-related traits, capturing the extent to which people experience, attend to, identify, understand, regulate, and utilize their emotions and those of others. As previous studies have provided converging evidence that frontal asymmetries were one of the determinants of emotion dispositions and behaviors, and as observations on individuals with a high level of emotional intelligence parallel those on people with a left-sided frontal cortical asymmetry in nearly every respect, we hypothesized that the level of emotional intelligence might be associated with differential frontal activation. Results supported the hypothesis: the pattern of resting electroencephalographic (EEG) activation recorded in the frontal areas was significantly associated with emotional intelligence. Individuals with higher trait EI evidence greater resting left frontal activation. [less ▲]

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See detailValidation of a two-plate microbiological method for screening antibiotic residues in shrimp tissue
Pham Kim, Dang ULg; Degand, Guy ULg; Danyi, Sophie ULg et al

in Analytica Chimica Acta (2010), 672

Microbiological inhibition screening tests could play an important role to detect residues of antibiotics in the different animal food products, but very few are available for the aquaculture products in ... [more ▼]

Microbiological inhibition screening tests could play an important role to detect residues of antibiotics in the different animal food products, but very few are available for the aquaculture products in general, and for shrimps in particular. A two-plate microbiological method to screen shrimp for residues of the most commonly used antibiotics has been developed and validated according to criteria derived from the European Commission Decision 2002/657/CE. Bacillus subtilis was used as a sensitive strain to target antibiotics. Culture conditions on Petri plates (pH of medium) were selected to enhance the capacity of antibiotic detection. Antibiotic residues were extracted from shrimps using acetonitrile/acetone (70/30, v/v) before application on Petri plates seeded with B. subtilis. The method was validated using spiked blank tissues as well as antibiotic treated shrimps with enrofloxacin and tetracycline, two antibiotics often found to be used in shrimp production. For tetracyclines and (fluoro)quinolones, the detection capability was below the maximum residue limit (MRL), while it was around the MRL for sulfonamides. The specificity of the microbiological screening was 100% in all cases while the sensitivity and accuracy was 100% in almost all cases. The capacity of the method to detect contaminated samples was confirmed on antibiotic treated shrimps, analyzed in parallel with a confirmatory method (Liquid Chromatography coupled to mass spectrometry (LC–MS)). [less ▲]

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See detailDiscrete Harmonic Oscillator: A Short Compendium of Formulas
Antippa, Adel F.; Dubois, Daniel ULg

in Dubois, Daniel (Ed.) COMPUTING ANTICIPATORY SYSTEMS (2010)

Since 2002, we have, in seven papers, studied the problem of the discrete harmonic oscillator, analytically, numerically, and graphically, and made progress on a number of fronts. We identified the ... [more ▼]

Since 2002, we have, in seven papers, studied the problem of the discrete harmonic oscillator, analytically, numerically, and graphically, and made progress on a number of fronts. We identified the natural frequency of oscillation of the dual incursive oscillators, studied the system bifurcation generated by incursive discretization, and the frequency dependent correlation between the resulting incursive oscillators. We also studied the synchronization of the discretizing time interval with the frequency of oscillation. From this analysis there emerged a nonlinear (or more precisely bilinear) formalism that is perfectly stable at all time scales, and fully conserves the total energy of the system. The formalism is applicable to the discrete harmonic oscillator specifically, and to discrete Hamiltonian systems in general. In retrospect the important themes and crucial steps can more easily be identified, and this is the purpose of this short note. In it we give, in a unified notation, a short compendium of the key formulas. This summary can serve as a guide for navigating through the seven papers, as well as a practical concise manual for using the formalism. [less ▲]

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See detailAssessment of bovine tuberculosis risk factors based on nationwide molecular epidemiology
Humblet, Marie-France ULg; Gilbert, M.; Govaerts, M. et al

in Journal of Clinical Microbiology (2010)

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See detailModes et formes d'émergence d'une nouvelle génération
Delhalle, Nancy ULg

in Ubu: scènes d'Europe = European stages (2010)

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See detailConception et réalisation du système de déploiement des antennes du nanosatellite OUFTI-1
Wertz, Jérôme ULg; Lenaerts, Vincent; Bruls, Olivier ULg et al

in Coudyser, A. (Ed.) Revue Scientifique des Instituts Supérieurs Industriels Libres Francophones, volume 24 (2010)

The OUFTI-1 satellite is a CubeSat (a standard cubic satellite of 10cm edge and 1 kg mass maximum) developed at University of Liège. The subject of the master thesis is the design and realization of its ... [more ▼]

The OUFTI-1 satellite is a CubeSat (a standard cubic satellite of 10cm edge and 1 kg mass maximum) developed at University of Liège. The subject of the master thesis is the design and realization of its antennas, and also of their deployment system. The thesis result is a prototype including all the system functions and which has been vacuum-tested. [less ▲]

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See detailDiscrete Harmonic Oscillator: Evolution of Notation and Cumulative Erratum
Antippa, Adel F.; Dubois, Daniel ULg

in Dubois, Daniel (Ed.) COMPUTING ANTICIPATORY SYSTEMS (2010)

As the project on the discrete harmonic oscillator advanced, the notation evolved in parallel with our understanding of the problem, and it became progressively clear that a change of notation concerning ... [more ▼]

As the project on the discrete harmonic oscillator advanced, the notation evolved in parallel with our understanding of the problem, and it became progressively clear that a change of notation concerning the natural angular frequency of oscillation of the system, and related parameters, was required in order to conform to the spirit of the physics being developed. Specifically the notation needed to reflect the fact that the discrete harmonic oscillator is the more general entity, with the continuous harmonic oscillator being a special (and to some extent unrealistic) limiting case corresponding to dt-->0, where dt is the discretizing time interval. Furthermore, as the discrete nature of time (and eventually space), incursion (anticipation), system bifurcation, hyperincursion, frequency dependent correlation, and synchronization, where progressively integrated into the fabric of the discretizing algorithm, a new discrete, perfectly stable and energy conserving, formalism emerged, and with it evolved, in parallel, the expression for the total energy. In this short note we will focus on the evolution, throughout the project, of the notation for frequency, and the expression for the discrete total energy. We also provide a cumulative erratum for the seven papers in the project so far, as well as a table summarizing the evolution of the notation for the angular frequency and related parameters. [less ▲]

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See detailLettres privées à caractère médical: Bibliographie
Ricciardetto, Antonio ULg

Textual, factual or bibliographical database (2010)

Detailed reference viewed: 17 (7 ULg)
See detailQu’est-ce qu’une personne ? , Dun-sur Meuse,
Strivay, Lucienne ULg

in Vendredi, Jacques (Ed.) Catalogue de l’exposition “Expressionnisme wallon contemporain - Regard d’un collectionneur” (2010)

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See detailPaul Jaspar, from Eclecticism to Art Nouveau
Charlier, Sébastien ULg

in Coup de fouet (2010), (15), 36-41

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See detailMulti-Months Cycles Observed in Climatic Data
Nicolay, Samuel ULg; Mabille, Georges ULg; Fettweis, Xavier ULg et al

in Simard, Suzanne (Ed.) Climate Change and Variability (2010)

Climatic variations happen at all time scales and since the origins of these variations are usually of very complex nature, climatic signals are indeed chaotic data. The identification of the cycles ... [more ▼]

Climatic variations happen at all time scales and since the origins of these variations are usually of very complex nature, climatic signals are indeed chaotic data. The identification of the cycles induced by the natural climatic variability is therefore a knotty problem, yet the knowing of these cycles is crucial to better understand and explain the climate (with interests for weather forecasting and climate change projections). Due to the non-stationary nature of the climatic time series, the simplest Fourier-based methods are inefficient for such applications (see e.g. Titchmarsh (1948)). This maybe explains why so few systematic spectral studies have been performed on the numerous datasets allowing to describe some aspects of the climate variability (e.g. climatic indices, temperature data). However, some recent studies (e.g. Matyasovszky (2009); Paluš & Novotná (2006)) show the existence of multi-year cycles in some specific climatic data. This shows that the emergence of new tools issued from signal analysis allows to extract sharper information from time series. Here, we use a wavelet-based methodology to detect cycles in air-surface temperatures obtained from worldwide weather stations, NCEP/NCAR reanalysis data, climatic indices and some paleoclimatic data. This technique reveals the existence of universal rhythms associated with the periods of 30 and 43 months. However, these cycles do not affect the temperature of the globe uniformly. The regions under the influence of the AO/NAO indices are influenced by a 30 months period cycle, while the areas related to the ENSO index are affected by a 43 months period cycle; as expected, the corresponding indices display the same cycle. We next show that the observed periods are statistically relevant. Finally, we consider some mechanisms that could induce such cycles. This chapter is based on the results obtained in Mabille & Nicolay (2009); Nicolay et al. (2009; 2010). [less ▲]

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See detailHedge fund return specification with errors-in-variables
Coën, Alain; Hübner, Georges ULg; Desfleurs, Aurélie

in Journal of Derivatives and Hedge Funds (2010), 16(1), 22-52

In linear models for hedge fund returns, errors-in-variables may significantly alter the measurement of factor loadings and the estimation of abnormal performance. The higher moment estimator (HME ... [more ▼]

In linear models for hedge fund returns, errors-in-variables may significantly alter the measurement of factor loadings and the estimation of abnormal performance. The higher moment estimator (HME) introduced by Dagenais and Dagenais (1997) effectively deals with these issues. Results on individual funds show that the HME specification does not uncover systematic performance biases, but can modify estimated alphas in most cases and identifies relative persistence for directional funds in bearish market conditions. Overall, the risk premia calculated with HME remain relatively stable when compared to ordinary least squares specifications. [less ▲]

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See detailSustained efficacy of occipital nerve stimulation in drug-resistant chronic cluster headache after up to 5 years treatment
Magis, Delphine ULg; Gérardy, Pierre-Yves; Remacle, Jean-Michel et al

in Journal of Headache & Pain (2010), 11(Suppl 1), 15

Background. Drug-resistant chronic cluster headache (drCCH) is a devastating condition for which various invasive procedures have been tempted without any satisfactory effect. Our prospective pilot study ... [more ▼]

Background. Drug-resistant chronic cluster headache (drCCH) is a devastating condition for which various invasive procedures have been tempted without any satisfactory effect. Our prospective pilot study of great occipital nerve stimulation (ONS) in 8 drCCH patients showed encouraging results at 15 months (1). Methods. We recruited 15 patients with drCCH according to the previously published criteria of intractability (2). They were implanted with suboccipital stimulators on the side of their headache. Long-term follow-up was achieved by questionnaires administered during a headache consultation and/or by telephone interviews. Results. One patient had an immediate post operative infection of the material. Mean time with ONS was 28.8 months (range 3-60 months). Nine of the 14 remaining patients were totally pain-free (64%), 2 patients had an improvement in frequency exceeding 90% and one patient a 89% amelioration. Two patients did not respond or described mild improvement. Intensity of residual attacks was not improved by ONS. Four patients (29%) were able to reduce their prophylaxis. Common technical problems were battery depletion (N=8/14, 57%) and material infection (N=3/15, 20%). Recurrent battery replacement (until 2/ year in one patient) is now avoided by the availability of rechargeable batteries. Clinical peculiarities associated with ONS were occurrence of infrequent contralateral attacks (N=5/14, 36%), and/or isolated ispilateral autonomic attacks (N=5/14, 36%). Rapid attack recurrence after stimulator switch off was reported by 7/12 improved patients (58%). Two patients found ONS-related paresthesias unbearable; one had his stimulator removed, the other switched it off though he was objectively ameliorated. Subjectively, nine patients are very satisfied by ONS and one patient moderately satisfied. Conclusions. Our long-term follow-up confirms the efficacy of ONS in drCCH, which remains a safe and well-tolerated technique. The occurrence of contralateral attacks and isolated autonomic attacks in nearly 50% of ONS responders may have therapeutic and pathophysiological implications. [less ▲]

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See detailLe groupe µ et la théorie littéraire
Badir, Sémir ULg

in Ablali, Driss; Kastberg Sjöblom, Margareta (Eds.) Linguistique et Littérature. Cluny, 40 ans après (2010)

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