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See detailInterference and negative priming in normal aging and in mild Alzheimer’s disease
Hogge, Michaël; Salmon, Eric ULg; Collette, Fabienne ULg

in Psychologica Belgica (2008), 48(1), 1-23

Most studies that have administered interference and negative priming tasks to patients with Alzheimer’s disease (AD) and healthy elderly subjects have demonstrated inhibitory dysfunction in AD patients ... [more ▼]

Most studies that have administered interference and negative priming tasks to patients with Alzheimer’s disease (AD) and healthy elderly subjects have demonstrated inhibitory dysfunction in AD patients, and mixed results in the elderly. In the present study, we re-explored these two effects in these populations by administering two tasks that allow assessing interference and negative priming effects. Results on both tasks showed (1) the presence of an interference effect in AD and elderly adults, that can be explained by cognitive slowing in the case of elderly controls; (2) the preservation of negative priming abilities in the two groups. These surprising results for AD patients were interpreted by proposing that AD patients have a preserved ability to suppress the representation of a distracter, but specific inhibitory deficits when they have to resolve a selection conflict at the stage of response production (i.e. when competing stimuli have been fully processed). [less ▲]

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See detailInterférence de l'adenylate kinase dans le dosage de la CK-MB dans la phase précoce de l'infarctus du myocarde
Chapelle, Jean-Paul ULg; Heusghem, C.; Buret, J.

Conference (1978, March 23)

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See detailL’interférence de l’ARN (ARNi): un mécanisme fondamental longtemps ignoré
Cornet, Anne ULg

Conference (2006, December 05)

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See detailInterference Fragmentation Functions and Transverse Spin Studies.
Courtoy, Aurore ULg; Bacchetta, Alessandro; Radici, Marco

Conference (2012)

We report on the extraction of dihadron fragmentation functions (DiFF) from the semi- inclusive production of two hadron pairs in back-to-back jets in e+e− annihilation. A nonzero asymmetry in the ... [more ▼]

We report on the extraction of dihadron fragmentation functions (DiFF) from the semi- inclusive production of two hadron pairs in back-to-back jets in e+e− annihilation. A nonzero asymmetry in the correlation of azimuthal orientations of opposite π+π− pairs is related to the transverse polarization of fragmenting quarks through a significant polarized DiFF. A combined analysis of this asymmetry and the spin asymmetry in the SIDIS process ep↑ → e′(π+π−)X has led to the first extraction of the u and d-flavor transversity parton distribution function in the framework of collinear factorization. [less ▲]

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See detailInterference in the light emitted by a single tunneling atom
Martin, John ULg; Braun, Daniel

Poster (2008, July)

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See detailInterférence négative du travail sur la famille et stress au travail : impact du support organisationnel perçu
Hansez, Isabelle ULg; Stinglhamber, Florence; Hanin, Dorothée

in Pettersen, N.; Boudrias, J. S.; Savoie, A. (Eds.) Entre tradition et innovation, comment transformons-nous l'univers de travail? Actes du 15ème congrès de Psychologie du Travail et des Organisations de Langue Française (2008)

Le modèle de Karasek (1979) est l’un des modèles le plus utilisé dans les recherches sur le lien travail-famille et sur le stress professionnel. Parmi les variables qu’il inclut, figurent le support ... [more ▼]

Le modèle de Karasek (1979) est l’un des modèles le plus utilisé dans les recherches sur le lien travail-famille et sur le stress professionnel. Parmi les variables qu’il inclut, figurent le support social du supérieur et des collègues. À notre connaissance, peu d’études ont essayé d’analyser le lien entre l’interférence travail-famille, le stress négatif et d’autres sources de support social tel que le support perçu de l’organisation. Or, en accord avec la méta-analyse de Rhoades & Eisenberger en 2002, nous faisons l’hypothèse que le support organisationnel perçu joue un rôle central dans le lien entre les caractéristiques du travail, l’interférence négative travail-famille et le stress négatif qui en découle. Notre étude s’est réalisée dans un hôpital belge auprès de 266 membres du personnel soignant. Le questionnaire utilisé comprend : le Job Content Questionnaire de Karasek; l’échelle de support organisationnel perçu de Eisenberger (1986), l’échelle d’interférence négative du travail sur la famille (SWING, Geurts, 2004) et le stress négatif (SPPN, Hansez et al., 2004). Il en résulte que le support organisationnel perçu joue un rôle central dans les relations entre certaines caractéristiques du travail, l’interférence négative travail-famille et le stress par le biais d’une double médiation. En outre, l’effet négatif des exigences de travail sur le support organisationnel perçu est modéré par la latitude de décision que les employés peuvent avoir dans leur travail. Les résultats suggèrent qu’introduire le support organisationnel perçu dans des modèles liés aux relations travail-famille enrichirait les deux courants de recherche envisagés dans cette étude. En outre, le type de modèle utilisé dans cette recherche pourrait aussi être appliqué à d’autres types de variables dépendantes (e.g. la performance au travail). [less ▲]

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See detailInterference of a secondary task on procedural learning in children
Lejeune, Caroline ULg; Desmottes, Lise ULg; Catale, Corinne ULg et al

in Belgian Brain Congress 2012: Abstract Book (2012, October 27)

Introduction Procedural learning is generally considered as involving different learning phases, with cognitive resources playing an important role only during the initial learning step. Through repeated ... [more ▼]

Introduction Procedural learning is generally considered as involving different learning phases, with cognitive resources playing an important role only during the initial learning step. Through repeated practice, the skill becomes progressively more automatic and the involvement of controlled cognitive functions is progressively reduced (Anderson, 2000;Doyon and Benali, 2005;Beaunieux et al., 2006). This view has been supported by studies in which the mirror-tracing paradigm was used to evaluate procedural learning, demonstrating the implication of the executive mechanisms in the first phase of perceptuomotor learning (Rouleau, 2002;Brosseau et al., 2007). However, from a developmental perspective, little is known about the progression of learning in procedural tasks, as well as about the role played by the explicit cognitive processes during learning in children. We recently showed that the cognitive mechanisms involved during the procedural task differed between age groups (Lejeune et al., in press). Indeed, we observed that 7-year-old children performed the procedural task in a less controlled fashion than 10-year-olds, who used a more conscious strategy, which permits them to reach better performance levels. The aim of the present study was to confirm the differential implication of explicit mechanisms in procedural learning in children by using a dual-task paradigm. Objective The present study used a dual-task paradigm in order to further investigate the role played by explicit mechanisms during the early and final stages of procedural learning in two ages-groups (7- and 10 year-olds). An auditory interference task was introduced at the beginning and at the end of the procedural learning phase. According to Sun, Merrill, and Peterson (2001), the introduction of an interference task should affect more the explicit processes than the implicit processes, the latter being more automatic. Thus, we predict that performance would be altered by in the dual-task condition only during the first phase of learning, and not during the automation phase. Furthermore, considering that the cognitive mechanisms underlying procedural learning would be different between 7- and 10-year-old children, we predicted that the impact of the dual-task would differ between the two aged-groups: the dual-task condition should affect performance in 10-year-old children but not in the 7-year-old group. Method Seventy-six children were presented with a Mirror Tracing task under single or dual-task conditions. For the Mirror Tracing task, we conformed to the procedure used in previous studies in children (Vicari et al., 2005;Prehn-Kristensen et al., 2009) and we opted for a 5 points star with the double outline of 1 cm. The instruction was to follow the contour of the figure in order to “catch” different picture without leaving the limits of the contour. There were two learning sessions; the task included 10 trials, with a short break (2 min) between trials, and a second 10 trial session was conducted after a one-week delay. In dual-task condition, participants had to perform the procedural learning task while performing at the same time the interference auditory task (which consisted to answer to questions presented continuously). Results Results showed that completion time and accuracy during the mirror tracing task improved with each successive trial in both groups: all children learned the procedural skill regardless of their age and the experimental condition. As predicted, results showed that the impact of the dual-task differed between aged-groups during the first learning phase. While 10-year-old children were significantly slower and less accurate in the dual-task condition than 10-year-old children in the single-task condition, no difference between learning conditions was revealed in the 7-year-old group. Interestingly, at the end of learning (trials 19 and 20), the interference effect had disappeared: there was no impact of the secondary task on procedural performance, whatever the age-group. Discussion In this study, we explored with a dual-task paradigm the role played by explicit mechanisms during the early and final stages of procedural learning in two age-groups (7- and 10 year-olds). During the first learning step, 10-year-old children in the single-task condition used a conscious strategy to perform the task, which permits them to reach better performance levels than 10-year-old children in the dual-task condition (which prevents them from using their controlled cognitive processes). On the contrary, no impact of the interference task was observed in 7-year-old children, who performed the mirror tracing task similarly in the single- and dual-task conditions. This result supports our hypothesis that, in the beginning of a perceptuo-motor learning task, youngest children perform the procedural task in a more implicit fashion comparatively to older children. Thus, while performance of 10-year-old children is congruent with a top-down conception of procedural learning (i.e., performance in the first learning stages would be sustained by high-level explicit mechanisms), this is not the case for youngest children whose explicit mechanisms are not yet mature. So, our results confirm that the involvement of explicit learning mechanisms is not a “necessary condition” for motor skill learning to occur, a point of view supported by the bottom-up skill learning approach which postulates that explicit declarative knowledge is not necessarily associated with procedural skill learning and that the knowledge acquired could be stored in an implicit mode from the beginning of learning (Karmiloff-Smith, 1992;Sun et al., 2001). [less ▲]

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See detailInterférence proactive chez des sujets âgés vivant en institution ou à domicile
Van der Linden, Martial ULg; Bruyer, R.

in Archives de Psychologie (1991), 59

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See detailL'interférence virale chez les Alphaherpesvirinae
Meurens, François; Muylkens, Benoît ULg; Schynts, Frédéric et al

in Virologie (2003), 7

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See detailLes interférences analytiques : les anticorps hétérophiles
Cavalier, Etienne ULg

Conference given outside the academic context (2006)

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See detailLes interférences analytiques dans les dosages immunologiques
Cavalier, Etienne ULg

Conference given outside the academic context (2006)

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See detailInterferences between non-proliferation and science: ‘exporting’ dual-use know-how and technology in conformity with security imperatives
Charatsis, Christos ULg

Doctoral thesis (2016)

Chapter 1 introduces the reasoning underpinning the study: what are the main drivers and the overall objective for undertaking this intellectual endeavour. It also sets the main questions to be answered ... [more ▼]

Chapter 1 introduces the reasoning underpinning the study: what are the main drivers and the overall objective for undertaking this intellectual endeavour. It also sets the main questions to be answered and a hypothesis to be verified. Chapter 2 sets the scene where the study evolves. What is the role of research and what is the mission of different types of research organisations in today’s environment? The chapter discusses also the definitions of related terms such as Research and Development as these are entrenched in texts with universal applicability. Chapter 3 illuminates the role of knowledge from a proliferation point of view. What are the obligations stemming from legally binding treaties for industry and academia? The chapter also offers a comparative analysis of the multilateral export control regimes including main principles, control lists and terminology used. The concluding section attempts to explain the dual-use problem by providing a definition of dual-use research. Chapter 4 explains the main policies applying for EU funded research by focusing on the dissemination and use of research results for practical and commercial purposes. The chapter offers an analysis of the EU legal framework governing technology transfers of dual-use items. Following that, the main scenarios where trade controls come into play in a research context are discussed. Finally, the chapter offers an analysis of a case study exemplifying the interpretation and implementation of provisions and terms discussed all over the study. The H5N1 case study brings to the fore the differences between the EU and US in the oversight of dual-use research. Chapter 5 presents an assessment of the US trade controls towards academia. How do the US authorities interpret the fundamental research exemption? What is a ‘deemed export’ and how does it affect academic research? How the term ‘publicly available information’ should be understood? Chapter 6 sheds light on the role of internal controls in complying with the law and their nature as discretionary measures. The chapter provides a summary of the main principles and key elements of an Internal Compliance Programme (ICP). Then, it highlights the main steps required for designing and implementing ICPs. Chapter 7 examines the export compliance practices followed by firms, universities and public research organisations. In doing so, it identifies challenges encountered and compliance mechanisms used in different research environments. Chapter 8 sets forward a method for identifying export controls risks in the initial phase of development of an internal compliance structure. The risk identification method builds on international standards and previous experience for tackling export control concerns in a research setting. To that effect, an international public research organisation, the European Commission Joint Research Centre is used as a test case. Finally, chapter 9 compiles the main findings of the study responding also to the main questions set forth in the introductory chapter. [less ▲]

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See detailLes interférences entre le divorce et les pensions de retraite et de survie: le point de la question
Michiels, Olivier ULg

in Divorce : Actualité Juridique, Sociale et Fiscale (2002), 7

L'article examine les conséquences du divorce sur le droit à la pension de retraite et à la pension de survie.

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See detailInterférences entre phonologie et syntaxe en pathologie développementale du langage
Parisse, Christophe; Maillart, Christelle ULg

in Langage et l'Homme (Le) : Recherches Pluridisciplinaires sur le Langage (2006), 41

We compare three theories (pure phonological theory, surface theory, and mapping theory) about language developmental disorders considering that phonological difficulties are the main reason for the ... [more ▼]

We compare three theories (pure phonological theory, surface theory, and mapping theory) about language developmental disorders considering that phonological difficulties are the main reason for the children’s disorders. First, we identified the linguistic parameters (salience, phonological complexity, syntactic complexity, lexical/functional, semantic/syntactic) that are fundamental to these theories. Then we tested the validity of these parameters by testing them against results obtained by SLI children and control children. Nine syntactic categories were tested (determiner, noun, verb, etc.) No theory could fully explain the results obtained. Some linguistic parameters (eg. phonological complexity) are very interesting but fail to explain all results. Some other parameters (eg. salience) turned out to be inadequate to explain the results of French-speaking children. [less ▲]

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See detailInterferogram Stitching applied to the surface metrology of millimeter–wave and micrometer-wave reflectors
Roose, Stéphane ULg

in Slangen, Pierre; Cerruti, Christine (Eds.) Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers (2006, September)

This paper addresses the interferometric measurements performed on PLANCK Secondary reflector-Flight Model (SRFM) during the cryo-optical test at the Centre Spatial de Liege in Belgium. It was requested ... [more ▼]

This paper addresses the interferometric measurements performed on PLANCK Secondary reflector-Flight Model (SRFM) during the cryo-optical test at the Centre Spatial de Liege in Belgium. It was requested to measure the changes of the surface figure error (SFE) with respect to the best ellipsoid, between 293 K and 50 K, with a 1 μm RMS accuracy. To achieve this, Infra Red interferometry has been selected and a dedicated thermo mechanical set-up has been constructed. One emphasizes on the solutions adopted to cope with high surface slopes appearing at cryogenic temperature. Indeed, detector resolution has been exploited to resolve high density fringes at the expense of the aperture. A stitching procedure has been implemented to reconstruct the full aperture measurement with success. Test results are presented. [less ▲]

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See detailAn interferometric camera : ESPI and Photorefractivity
Deveuster, Christophe; Georges, Marc ULg

Conference (1998, May 12)

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See detailInterferometric Constraints on Gravity Darkening with Application to the Modeling of Spica A & B
Aufdenberg, J. P.; Ireland, M. J.; Mérand, A. et al

in Hartkopf, W. I.; Guinan, E. F.; Harmanec, P. (Eds.) Binary Stars as Critical Tools & Tests in Contemporary Astrophysics (2007, August 01)

In 2005 we obtained very precise interferometric measurements of the pole-on rapid rotator Vega (A0 V) with the longest baselines of the Center for High Angular Angular Resolution (CHARA) Array and the ... [more ▼]

In 2005 we obtained very precise interferometric measurements of the pole-on rapid rotator Vega (A0 V) with the longest baselines of the Center for High Angular Angular Resolution (CHARA) Array and the Fiber Linked Unit for Optical Recombination (FLUOR). For the analysis of these data, we developed a code for mapping sophisticated PHOENIX model atmospheres on to the surface of rotationally distorted stars described by a Roche-von Zeipel formalism. Given a setof input parameters for a star or binary pair, this code predicts the interferometric visibility, spectral energy distribution and high-resolution line spectrum expected for the system. For the gravity-darkened Vega, our model provides a very good match to the K-band interferometric data, a good match to the spectral energy distribution -- except below 160 nm -- and a rather poor match to weak lines in the high dispersion spectrum where the model appears overly gravity darkened. In 2006, we used the CHARA Array and FLUOR to obtain high precision measurements of the massive, non-eclipsing, double-line spectroscopic binary Spica, a 4-day period system where both components are gravity darkened rapid rotators. These data supplement recent data obtained with the Sydney University Stellar Interferometer. Our study follows the classic 1971 study by Herbison-Evans et al. who resolved Spica as a binary with the Narrabri Intensity Interferometer. We will report on our progress modelling the new interferometric and archival spectroscopic data, with the goal towards better constraining the apsidal constant. [less ▲]

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