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See detailCharacterization of superconductor magnetic properties in crossed magnetic fields
Vanderbemden, Philippe ULg

in Larbalestier, David; Cardwell, David (Eds.) Handbook of Superconducting Materials (2nd edition) (in press)

This chapter deals with the characterization of the magnetic properties of superconductors which are subjected to magnetic fields that have been applied along two orthogonal directions, which is commonly ... [more ▼]

This chapter deals with the characterization of the magnetic properties of superconductors which are subjected to magnetic fields that have been applied along two orthogonal directions, which is commonly referred to as a “crossed” magnetic field configuration. The purpose of this chapter is to describe the techniques that are useful to perform crossed field experiments, with an emphasis placed on practical aspects that are useful for designing the system and for understanding the measured data. This chapter is organized as follows. In Section 2, the key terms involved in the literature dealing with crossed field effects are defined. Section 3 deals with experimental methods and some key parameters will be outlined. In Section 4, practical conclusions will be drawn and next challenges in this area will be discussed. [less ▲]

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See detailOrigine et histoire de la folie : un nouveau Foucault, un nouveau fou
Englebert, Jérôme ULg

in Evolution Psychiatrique (in press)

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See detailCodifying ‘Sacred Laws’ in Ancient Greece
Carbon, Jan-Mathieu ULg; Pirenne-Delforge, Vinciane ULg

in Jaillard, Dominique; Nihan, Christophe (Eds.) Legal Codification in Ancient Greece and Ancient Israel (in press)

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See detailQuatre configurations pour créer une dynamique interactive entre formation et recherche Expériences dans le domaine de la formation des professionnels de la santé
Faulx, Daniel ULg; Burlet, Géraldine ULg; Bernard, Nicolas ULg et al

in Recherches Qualitatives (in press)

Dans cette contribution, nous nous penchons sur la possibilité de créer une dynamique interactive entre intervention sur le terrain et recherche scientifique dans le domaine de la formation. Les terrains ... [more ▼]

Dans cette contribution, nous nous penchons sur la possibilité de créer une dynamique interactive entre intervention sur le terrain et recherche scientifique dans le domaine de la formation. Les terrains d’application se situent tous ici dans le domaine de la santé. Nous présentons quatre configurations d’une telle complémentarité. Chacune d’entre elles représente une articulation différente entre le but de développement des participants et celui de production de savoirs scientifiques. Dans le premier cas, une démarche de recherche est entreprise en amont de la conception d’une formation. La deuxième configuration illustre une recherche scientifique appliquée à un dispositif d’intervention existant et qui vient en retour en modifier la logique. Pour la troisième, il s’agit d’une articulation continue entre recherche et formation s’alimentant mutuellement dans une logique de recherche-action. Enfin, la quatrième partie se penche sur trois dispositifs pédagogiques dont la caractéristique est de combiner des intentions formatives avec des préoccupations de recherche [less ▲]

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See detailStein's method for comparison of univariate distributions
Ley, Christophe; Reinert, Gesine; Swan, Yvik ULg

in Probability Surveys (in press)

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See detailEnhancement of Transmission System Voltage Stability through Local Control of Distribution Networks
Valverde, Gustavo; Aristidou, Petros; Van Cutsem, Thierry ULg

in Rueda Torres, Jose (Ed.) Dynamic Vulnerability Assessment and Intelligent Control for Sustainable Power Systems (in press)

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See detailLacustrine clay mineral assemblages as a proxy for land-use and climate changes over the last 4 kyr: The Amik Lake case study, Southern Turkey
El Ouahabi, Meriam ULg; Hubert, Aurelia ULg; Fagel, Nathalie ULg

in Quaternary International (in press)

Lake sediments are sensitive to landscape changes and most of these changes seem to be modulated by land-use (anthropogenic factors) coupled to palaeoenvironmental/palaeoclimatic changes. In its detrital ... [more ▼]

Lake sediments are sensitive to landscape changes and most of these changes seem to be modulated by land-use (anthropogenic factors) coupled to palaeoenvironmental/palaeoclimatic changes. In its detrital fraction, the lacustrine sediments record the history of soil erosion within its catchment via the inputs of clays and others detrital products. Within a Mediterranean context, the study investigates the upper sediments infilling the central part of the Amik basin in southern Turkey. This tectonic basin was occupied and exploited by modern human at least since 6000-7000 BC. We focus on the clay mineralogy (x-ray diffraction on oriented aggregates) and magnetic susceptibility measurements (Bartington) of the sedimentary record in the area over the last 4000 years, to assess environmental changes in relation with the different land uses and/or weathering during the successive Bronze, Iron, Roman, Islamic/Ottoman and Modern civilizations. The clay fraction of Amik Lake sediments comprises smectite, kaolinite, illite, chlorite and chlorite/smectite mixed layers that are the inherited clay phases. A relative change in abundance and crystallinity and chemistry of illite attests that environmental conditions evolved in the Amik Plain from the Bronze to Modern Age in relation with climates and/or land-use changes. The history of the Amik Lake reveals different soil erosion episode. The most intense erosion phase occurred during the Bronze/Iron Ages as indicated by the clay and magnetic susceptibility proxies. The Roman period was an exceptional period with soil erosion products arriving from the watershed, probably due the water channelization. A reduction of soil erosion occurred during the post Roman period until nowadays. Significant pedogenesis transformations are evidenced, especially during the Islamic/Ottoman periods suggesting intense chemical weathering conditions related to climate change. [less ▲]

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See detailThe neural bases of proactive and reactive control processes in normal aging
Manard, Marine ULg; François, Sarah ULg; Phillips, Christophe ULg et al

in Behavioural Brain Research (in press)

Introduction. Research on cognitive control suggests an age-related decline in proactive control abilities (anticipatory control), whereas reactive control (following conflict detection) seems to remain ... [more ▼]

Introduction. Research on cognitive control suggests an age-related decline in proactive control abilities (anticipatory control), whereas reactive control (following conflict detection) seems to remain intact. As proactive and reactive control abilities are associated with specific brain networks, this study investigated age-related effects on the neural substrates associated with each kind of control. Methods. In an event-related fMRI study, a modified version of the Stroop task was administered to groups of 20 young and 20 older healthy adults. Based on the theory of dual mechanisms of control, the Stroop task has been built to induce proactive or reactive control depending on task context. Results. Behavioral results (p < .05) indicated faster processing of interfering items in the mostly incongruent (MI) than the mostly congruent (MC) context in both young and older participants. fMRI results showed that reactive control is associated with increased activity in left frontal areas for older participants. For proactive control, decreased activity in the bilateral anterior cingulate cortex was associated with more activity in the right middle frontal gyrus in the older than the younger group. Conclusion. These observations support the hypothesis that aging affects the neural networks associated with reactive and proactive cognitive control differentially. These age-related changes are very similar to those observed in young adults with low dopamine availability, suggesting that a general mechanism (prefrontal dopamine availability) may modulate brain networks associated with various kinds of cognitive control. [less ▲]

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See detailPropagation of material and surface profile uncertainties on MEMS micro-resonators using a stochastic second-order computational multi-scale approach
Lucas, Vincent ULg; Golinval, Jean-Claude ULg; Voicu, Rodica et al

in International Journal for Numerical Methods in Engineering (in press)

This paper aims at accounting for the uncertainties due to material structure and surface topology of microbeams in a stochastic multiscale model. For micro-resonators made of anisotropic polycrystalline ... [more ▼]

This paper aims at accounting for the uncertainties due to material structure and surface topology of microbeams in a stochastic multiscale model. For micro-resonators made of anisotropic polycrystalline materials, micro-scale uncertainties are due to the grain size, grain orientation, and to the surface profile. First, microscale realizations of stochastic volume elements (SVEs) are obtained based on experimental measurements. To account for the surface roughness, the SVEs are defined as a volume element having the same thickness as the MEMS, with a view to the use of a plate model at the structural scale. The uncertainties are then propagated up to an intermediate scale, the meso-scale, through a second-order homogenization procedure.From the meso-scale plate resultant material property realizations, a spatially correlated random field of the in plane, out of plane, and cross resultant material tensors can be characterized. Owing to this characterized random field, realizations of MEMS-scale problems can be defined on a plate finite element model. Samples of the macro-scale quantity of interest can then be computed by relying on a Monte-Carlo simulation procedure. As a case study, the resonance frequency of MEMS micro-beams is investigated for different uncertainty cases, such as grain preferred orientations and surface roughness effects. [less ▲]

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See detailImmobility
Zickgraf, Caroline ULg

in Gemenne, François; McLeman, Robert (Eds.) Routledge Handbook on Environmental Displacement and Migration (in press)

This chapter provides a review of what we know about immobility in environmental migration studies.

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See detailRelating pessimistic memory predictions to Alzheimer’s disease brain structure
Genon, Sarah ULg; Simon, Jessica ULg; Bahri, Mohamed Ali ULg et al

in Cortex : A Journal Devoted to the Study of the Nervous System & Behavior (in press)

Patients with Alzheimer’s disease (AD) show impairment of episodic memory and related metacognitive processes. The present study examined subjective metacognitive judgments preceding objective memory ... [more ▼]

Patients with Alzheimer’s disease (AD) show impairment of episodic memory and related metacognitive processes. The present study examined subjective metacognitive judgments preceding objective memory retrieval and investigated the neural correlates of pessimistic predictions for successfully retrieved memories in AD patients. AD patients and healthy older participants provided predictive judgements on their recognition performance before retrieval of famous (semantic) and recently learned (episodic) names. Correlations between grey matter volume (GMV) in T1 images and behavioural scores were examined with multivariate (PLS) and univariate (GLM) analyses in AD patients. AD patients showed a significant proportion of successful name recognition preceded by pessimistic prediction (Prediction_low_hits) in episodic memory. PLS revealed that behavioural pattern in AD patients was related with a mainly right lateralized pattern of GMV decrease including medial temporal lobe and posterior cingulate cortex, but also right ventrolateral prefrontal cortex (VLPFC). GLM further confirmed that pessimistic prediction negatively correlated with GMV in VLPFC. Thus, impaired monitoring processes (possibly influenced by inaccurate beliefs) allowing inferences about one’s own memory performance are primarily related to decrease GMV in VLPFC in AD patients. [less ▲]

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See detailMolecular dynamics study of micelle proeprties according to their size
Lebecque, Simon ULg; Crowet, Jean-Marc ULg; Nasir, Mehmet Nail ULg et al

in Journal of Molecular Graphics and Modelling (in press)

Surfactants are molecules able to spontaneously self-assemble to form aggregates with well-defined properties, such as spherical micelles, planar bilayers, cylindrical micelles or vesicles. Micelles have ... [more ▼]

Surfactants are molecules able to spontaneously self-assemble to form aggregates with well-defined properties, such as spherical micelles, planar bilayers, cylindrical micelles or vesicles. Micelles have notably several applications in many domains, such as drug delivery or membrane protein solubilization. In this context, the study of micelle formation in relation with the structural and physico-chemical properties of surfactants is of great interest to better control their use in the different application fields. In this work, we use the MD approach developed by Yoshii et al. and extend it to surfactants with different structures. We aim to systematically investigate different micellar properties as a function of the aggregates size by a molecular dynamics approach, to get an insight into the micellar organization and to collect some relevant descriptors about micelle formation. For this, we perform short MD simulations of preformed micelles of various sizes and analyze three parameters for each micelle size, namely the eccentricity of the micelles, the hydrophobic/hydrophilic surface ratio and the hydrophobic tails hydration. If these parameters are known descriptors of micelles, they were not yet studied in this way by MD. We show that eccentricity, used as “validator” parameter, exhibits minimal values when the aggregate size is close to the experimental aggregation number for surfactants that are known to form spherical micelles. This hence indicates that our methodology gives consistent results. The evolution of the two descriptors follows another scheme, with a sharp increase and decrease, respectively, followed by a leveling-off. The aggregate sizes at which this stabilization starts to occur are close to the respective aggregation number of each surfactant. In our approach, we validate the use of these descriptors to follow micelle formation by MD, from “simple” surfactants to more complex structures, like lipopeptides. Our calculations also suggest that some peculiar behavior, like that of TPC, can be highlighted by our approach. In the context of peptidic surfactants, our methodology could further help to improve computer simulations combined to molecular thermodynamic models to predict micellar properties of those more complex amphiphilic molecules. [less ▲]

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See detailBehaviour and browse species selectivity of heifers grazing in a temperate silvopastoral system
Vandermeulen, Sophie ULg; Ramírez-Restrepo, Carlos Alberto; Marche, Christian et al

in Agroforestry Systems (in press)

In Belgium silvopastoral grazing systems associating trees and pasture are instrumental in enhancing dynamic trade-offs between ruminant farming and habitat improvement. A 130-day study was conducted in ... [more ▼]

In Belgium silvopastoral grazing systems associating trees and pasture are instrumental in enhancing dynamic trade-offs between ruminant farming and habitat improvement. A 130-day study was conducted in Belgium from April to September 2013 to evaluate the effects of browsing a combination of shrubs and trees (i.e. hedge) on the selective behaviour of cattle and to relate these observations to changes in forage nutritive value. Twelve Holstein dairy heifers (Bos taurus; 487 kg) were allocated to either a control ryegrass pasture (i.e. control pasture group; CPG) or a pasture plus unrestricted browsing (i.e. browsing group; BG) of a hedge composed of shrubs and trees. Behaviour and selectivity towards the woody species were recorded for 14h on a daily basis during 3 consecutive days over spring, early summer and late summer. Leaves and stems of woody species and faecal samples were collected during each season to analyse their nutritive value and predict the dry matter intake by means of near infrared reflectance spectroscopy. Integrating shrubs and trees along a pasture influenced the heifers’ behaviour and BG heifers spent 19.3, 5.9 and 5.4% of their time browsing during spring, and early and late summer, respectively (P < 0.001). This behaviour was correlated to the pre-grazing pasture biomass (r=0.50; P < 0.001). Compared with the summer seasons, the greater browsing activity in spring was associated with higher plant feeding value. Overall, the most ingested species were Carpinus betulus, Cornus sanguinea, Corylus avellana and Crataegus monogyna. It was concluded that cattle use a significant time budget for browsing on temperate ryegrass pasture but further research is required to investigate potential benefits of silvopastoral systems in Belgium. [less ▲]

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See detailLéonard de Vinci et d'autres. Artistes italiens au service de François d'Angoulême (et de Louise de Savoie)
Fagnart, Laure ULg

in Lastroiali, Chiara (Ed.) L'Italia e Francesco I. Scambi, influenze, diffidenze fra Medioevo e Rinascimento (in press)

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See detailCompte-rendu de l’ouvrage de Peter M. Daly, G. Richard Dimler SJ, The Jesuit Emblem in the European Context
De Marco, Rosa ULg

in Archivum Historicum Societatis Iesu (in press)

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See detailResurgence of Schmallenberg virus in Belgium after 3 years of epidemiological silence
Delooz, L; Saegerman, Claude ULg; Quinet, C et al

in Transboundary and Emerging Diseases (in press)

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See detailAutomated multimodal volume registration based on supervised 3D anatomical landmark detection
Vandaele, Rémy ULg; LALLEMAND, François ULg; MARTINIVE, Philippe ULg et al

in SCITEPRESS Digital Library (in press)

We propose a new method for automatic 3D multimodal registration based on anatomical landmark detection. Landmark detectors are learned independantly in the two imaging modalities using Extremely ... [more ▼]

We propose a new method for automatic 3D multimodal registration based on anatomical landmark detection. Landmark detectors are learned independantly in the two imaging modalities using Extremely Randomized Trees and multi-resolution voxel windows. A least-squares fitting algorithm is then used for rigid registration based on the landmark positions as predicted by these detectors in the two imaging modalities. Experiments are carried out with this method on a dataset of pelvis CT and CBCT scans related to 45 patients. On this dataset, our fully automatic approach yields results very competitive with respect to a manually assisted state-of-the-art rigid registration algorithm. [less ▲]

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See detailPreterm Infant Growth Velocity Calculations: A Systematic Review
Fenton, Tanis; Chan, Hilton; Madhu, Aiswarya et al

in Pediatrics (in press)

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See detailComprehensive Human Papilloma Virus (HPV) Genotyping in Cervical Squamous Cell Carcinomas and its Relevance to Cervical Cancer Prevention in Malawian Women
Howitt, Brooke; Herfs, Michael ULg; Tomoka, Tamiwe et al

in Journal of Global Oncology (in press)

Detailed reference viewed: 23 (3 ULg)