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See detailSystem-based approaches for structural optimization of flexible mechanisms
Tromme, Emmanuel; Held, Alexander; Duysinx, Pierre ULiege et al

in Archives of Computational Methods in Engineering (in press)

This paper reviews the state-of-the-art methods to perform structural optimization of flexible mechanisms. These methods are based on a system-based approach, i.e. the formulation of the design problem ... [more ▼]

This paper reviews the state-of-the-art methods to perform structural optimization of flexible mechanisms. These methods are based on a system-based approach, i.e. the formulation of the design problem incorporates the time response of the mechanism that is obtained from a dynamic simulation of the flexible multibody system. The system-based approach aims at considering as precisely as possible the effects of nonlinear dynamic loading under various operating conditions. Also, the optimization process enhances most existing studies which are limited to (quasi-) static or frequency domain loading conditions. This paper briefly introduces flexible multibody system dynamics and structural optimization techniques. Afterwards, the two main methods, named the weakly and the fully coupled methods, that couple both disciplines are presented in details and the influence of the multibody system formalism is analyzed. The advantages and drawbacks of both methods are discussed and future possible research areas are mentioned. [less ▲]

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See detailReconciling Plato’s and Aristotle’s Cosmologies. Attemps at Harmonization in Simplicius
Gavray, Marc-Antoine ULiege

in Strobel, Benedikt (Ed.) Die Kunst der philosophischen Exegese bei den antiken Platon- und Aristoteles Kommentatoren (in press)

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See detailPlatelets contribute to the initiation of colitis-associated cancer by promoting immunosuppression
Servais, Laurence ULiege; Wéra, Odile ULiege; Dibato Epoh, John et al

in Journal of Thrombosis and Haemostasis (in press)

Background: Clinical and experimental evidence support a role for inflammation in the development of colorectal cancer, though the mechanisms are not fully understood. Beyond thrombosis and hemostasis ... [more ▼]

Background: Clinical and experimental evidence support a role for inflammation in the development of colorectal cancer, though the mechanisms are not fully understood. Beyond thrombosis and hemostasis, platelets are key actors of inflammation; they also have been involved in cancer. However, whether platelets participate in the link between inflammation and cancer is unknown. Objective: To investigate the contribution of platelets and platelet-derived proteins to inflammation-elicited colorectal tumor development. Methods: We used a clinically relevant mouse model of colitis-associated cancer. Platelet secretion and their reactivity to thrombin were assessed at each stage of carcinogenesis. We conducted an unbiased proteomic analysis of releasates of platelets isolated at pre-tumoral stage to identify soluble factors that might act on tumor development. Plasma levels of the identified proteins were measured during the course of carcinogenesis. We then treated the mice with clopidogrel to efficiently inhibit platelet release reaction. Results: At pre-tumoral stage, hyperactive platelets were a major source of circulating pro-tumoral serum amyloid A (SAA) proteins. Clopidogrel prevented the early elevation of plasma SAA, decreased colitis severity, and delayed the formation of dysplastic lesions and adenocarcinoma. Platelet inhibition hindered the expansion and function of immunosuppressive myeloid cells as well as their infiltration in tumors, while tissue CD8 T cells were augmented. Platelets or releasates of platelets from cancer mice both were able to polarize myeloid cells toward an immunosuppressive phenotype. Conclusions: Thus, platelets promote initiation of colitis-associated cancer by enhancing myeloid cell dependent immunosuppression. Antiplatelet agents may help prevent inflammation-elicited carcinogenesis by restoring antitumor immunity. [less ▲]

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See detailDer individuelle Rechtsschutz gegen Verwaltungshandlungen - Landesbericht Belgien
Behrendt, Christian ULiege; Miny, Xavier ULiege

in Huber, Peter M.; von Bogdandy, Armin (Eds.) Ius Publicum Europaeum, vol. VIII (in press)

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See detailCarte géologique de Wallonie (Belgique) 1/10.000, 48/8 Clavier
Barchy, Laurent; Marion, Jean-Marc ULiege

Cartographic material (in press)

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced since the previous edition in 1902 (at 1/40.000, by Lohest, Forir ... [more ▼]

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced since the previous edition in 1902 (at 1/40.000, by Lohest, Forir and Mourlon). [less ▲]

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See detailCarte géologique de Wallonie (Belgique) 1/10.000, 48/7 Modave
Barchy, Laurent; Marion, Jean-Marc ULiege

Cartographic material (in press)

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced since the previous edition in 1902 (at 1/40.000, by Lohest, Forir ... [more ▼]

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced since the previous edition in 1902 (at 1/40.000, by Lohest, Forir and Mourlon). [less ▲]

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See detailCarte géologique de Wallonie. Huy-Nandrin n°48/3-4
Mottequin, Bernard; Marion, Jean-Marc ULiege

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New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced since the first edition by Gustave Dewalque & colleagues (1898 ... [more ▼]

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced since the first edition by Gustave Dewalque & colleagues (1898) published at the scale of 1/40.000 [less ▲]

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See detailAn H-band Vector Vortex Coronagraph for the Subaru Coronagraphic Extreme-Adaptive Optics System
Kühn, Jonas; Serabyn, Eugene; Lozi, Julien et al

in Publications of the Astronomical Society of the Pacific (in press)

The vector vortex is a coronagraphic imaging mode of the recently commissioned Subaru Coronagraphic Extreme-Adaptive Optics (SCExAO) platform on the 8-m Subaru Telescope. This multi-purpose high-contrast ... [more ▼]

The vector vortex is a coronagraphic imaging mode of the recently commissioned Subaru Coronagraphic Extreme-Adaptive Optics (SCExAO) platform on the 8-m Subaru Telescope. This multi-purpose high-contrast visible and near-infrared (R- to K-band) instrument is not only intended to serve as a VLT-class "planet-imager" instrument in the Northern hemisphere, but also to operate as a technology demonstration testbed ahead of the ELTs-era, with a particular emphasis on small inner-working angle (IWA) coronagraphic capabilities. The given priority to small-IWA imaging led to the early design choice to incorporate focal-plane phase-mask coronagraphs. In this context, a test H-band vector vortex liquid crystal polymer waveplate was provided to SCExAO, to allow a one-to-one comparison of different small-IWA techniques on the same telescope instrument, before considering further steps. Here we present a detailed overview of the vector vortex coronagraph, from its installation and performances on the SCExAO optical bench, to the on-sky results in the extreme AO regime, as of late 2016/early 2017. To this purpose, we also provide a few recent on-sky imaging examples, notably high-contrast ADI detection of the planetary-mass companion \kappa Andromedae b, with a signal-to-noise ratio above 100 reached in less than 10 mn exposure time. [less ▲]

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See detailTechnological behaviour of Cretaceous and Pliocene clays of northern Morocco used in fired brick manufacturing
El Ouahabi, Meriam ULiege; Daoudi, Lahcen; Fagel, Nathalie ULiege

in Journal of Materials and Environmental Science (in press)

Northern Morocco has an important local ceramic industry. Twenty-three Craterous and Pliocene clays from Tangier area (Northern Morocco) were studied to test their suitability as raw material for fired ... [more ▼]

Northern Morocco has an important local ceramic industry. Twenty-three Craterous and Pliocene clays from Tangier area (Northern Morocco) were studied to test their suitability as raw material for fired brick production. To assess their behaviour, the chemical composition, specific surface area (SSA), cation exchange capacity (CEC), and apparent density of clays were determined. The chemical composition consisted mainly of SiO2 (32 – 60%), Al2O3 (7 – 30%), and CaO (0.5 – 32%). SSA and CEC values of all the samples were low. The apparent density, pore volume, and micropore values were almost similar. Clay bricks were prepared by forming and shaping, and then fired in the range of 800 – 1100°C. Firing shrinkage, loss on mass and water absorption capacity were done in order to characterize clays after firing. Most of the clay samples have the necessary properties for the manufacturing of brick products. However, some clay samples were above the norm of loss on weight, due mainly to their high amount of carbonates. Furthermore, some kaolinitic samples from Pliocene blue marls and Cretaceous marls are inappropriate for building-related brick fabrication, because of the development of portlandite in brick, when in contact with moisture of the air. However, it will be necessary to mix them with other clays with little or no carbonate to dilute their carbonates content and then enhance their workability. [less ▲]

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See detailQuantification des politiques versus démocratisation de l’évaluation : Etude des plans de cohésion sociale en Wallonie
Fallon, Catherine ULiege; Feron, Pauline

in Mespoulet, Martine (Ed.) Usages des chiffres dans l’action publique territoriale (in press)

L’usage des chiffres dans l’action publique (ou la « quantification du politique ») mobilise deux registres en tension : premièrement celui de la performance, où « le chiffre est conçu comme un acteur ... [more ▼]

L’usage des chiffres dans l’action publique (ou la « quantification du politique ») mobilise deux registres en tension : premièrement celui de la performance, où « le chiffre est conçu comme un acteur contribuant à encadrer l’action en restreignant les options soumises à délibération et les choix ouverts à la décision collective », et deuxièmement la démocratie, perçue comme « un facteur d’extension du débat public et d’accroissement des sphères d’exercice de la responsabilité politique des citoyens ». Ogien relève le renforcement de cette tension, tout en soulignant l’absence de démocratisation de la mesure elle-même. Afin de remédier à cet écueil, l’auteur propose que les citoyens, rarement pris en considération dans l’élaboration et la définition des termes de la mesure, soient parties prenantes « du système du chiffre qui sert à rendre compte de leur existence et de leur destinée ». Cette contribution analyse les modalités concrètes de cette tension dans le cadre de l’évaluation d’une politique régionale mise en place au niveau local, les plans de cohésion sociale (PCS) en Région wallonne (Belgique), en mobilisant les données recueillies lors de l’évaluation des PCS terminée en mars 2013 . En effet, un enjeu important des PCS était la mise en place d’un processus d’évaluation qui se voulait « participatif» . La participation citoyenne étant une notion centrale de la philosophie PCS, un des objectifs de la Direction interdépartementale de la cohésion sociale (DiCS – administration régionale en charge du programme) était de la promouvoir à travers toutes les étapes de mise en œuvre de cette politique, y compris pour l’évaluation d’impact, inspirée en cela par les propositions méthodologiques du Conseil de l’Europe. Dans un premier temps, le bureau régional de statistique avait développé un indicateur composite « d’accès aux droits sociaux fondamentaux » afin d’objectiver la clé de répartition des ressources entre les territoires locaux. Ce n’est que dans un second temps, en fin de programme, que la DiCS était sommée de produire une « évaluation participative » mesurant l’impact des actions réalisées à travers les PCS sur la cohésion sociale et le bien-être. L’article propose de confronter ces deux démarches d’évaluation : celle qui aboutit à un indicateur quantitatif fondé sur une logique statistique et l’approche participative favorisant l’expression des parties prenantes. [less ▲]

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See detailEnjeux politiques de l'ignorance pour les nouvelles pratiques philosophiques
Herla, Anne ULiege; Jeanmart, Gaëlle ULiege

in de Moor, Mieke (Ed.) Socrate à l'Agora. Que peut la parole philosophique ? (in press)

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See detailSublime Gaps: the Absence of Closure in the Metaphysical Detective Story
Dechene, Antoine ULiege

in Sillages critiques (in press)

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See detailLe triangle didactique dans les préparations des stagiaires
Scheepers, Caroline ULiege

in André, Julie; Bertrand, Olivier; Schaffner, Isabelle (Eds.) Le français au siècle du numérique : enseignement et apprentissage? (in press)

La présente contribution prend en compte un volumineux corpus de fiches de préparations écrites rédigées par nos étudiants dans le cadre de leurs stages les préparant à devenir instituteurs du primaire ... [more ▼]

La présente contribution prend en compte un volumineux corpus de fiches de préparations écrites rédigées par nos étudiants dans le cadre de leurs stages les préparant à devenir instituteurs du primaire. Ces fiches seront envisagées sous l’angle du triangle didactique (Houssaye, 1988-2014). Autrement dit, nous tâcherons d’examiner comment se déclinent dans ces traces sémiotiques spécifiques ces trois dimensions que sont l’élève, le savoir et l’enseignant. Quelle place est réservée à l’élève ? Est-il bien présent dans les préparations ou est-il fantomatique ? Comment est-il nommé, désigné ? Ses réponses attendues sont-elles énoncées ? Les obstacles sur lesquels il pourrait buter sont-ils précisés ? Les activités sont-elles manifestement adaptées à lui ? Savons-nous ce que l’élève est invité à faire, avec qui, comment, pour quoi, pendant combien de temps, au moyen de quels outils ? Quelle place est faite, ou non, à la différenciation des apprentissages ? S’agissant du savoir, comment s’incarne-t-il dans les préparations, que l’on prenne en compte les savoirs supposés maitrisés par le stagiaire et ceux que l’élève est censé s’approprier au fil de la séquence d’apprentissage ? Sont-ils formalisés et, dans l’affirmative, de quelle manière ? Enfin, comment le stagiaire se projette-t-il lui-même dans le dispositif didactique qu’il planifie ? Se désigne-t-il à la première ou à la troisième personne du singulier ? Les propos qu’il projette de tenir sont-ils rédigés en style direct ou indirect ? Que savons-nous de ce qu’il prévoit de faire, de dire ? Autant de questions que nous appliquerons à notre corpus. L’approche sera d’abord descriptive, puis normative. [less ▲]

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See detailMartin Heidegger, Extrait du dernier cours de Marbourg
Pieron, Julien ULiege

in Philosophie (in press)

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See detailCritique de la critique et filiation : Fénéon par Paulhan
Saint-Amand, Denis ULiege

in Stienon, Valérie; Van Nuijs, Laurence (Eds.) Figures du critique-écrivain (in press)

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See detailWorking memory treatment in aphasia: a theoretical and quantitative review.
Majerus, Steve ULiege

in Journal of Neurolinguistics (in press)

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See detailRemarques iconographiques et épigraphiques concernant des empreintes de sceauxcylindres inscrits de Mari - Ville II
Colonna d'Istria, Laurent ULiege

in Battini, Laura; Abrahami, Philippe (Eds.) --- (in press)

Among the stamp seals from the Ville II of Mari (EDIII - Early Akkad periods) published by D. Beyer in 2007, several are inscribed. Improvements in the reading of owner’s name and / or the layout of the ... [more ▼]

Among the stamp seals from the Ville II of Mari (EDIII - Early Akkad periods) published by D. Beyer in 2007, several are inscribed. Improvements in the reading of owner’s name and / or the layout of the decor can be proposed for some stamps seals discovered in the “chantier H” and “chantier F”. Firstly, a new view of the decor of the cylinder-seal owned by the wife of the "EN of Mari", documented by stamps from the “chantier H”, will be considered. Then, for some of “servant of the girl” known by stamps also discovered in the “chantier H”, this article will propose new reading of their names. Finally, it is now possible to identify the name and function of the owner of the cylinder-seal documented by the only sealing discovered in the “chantier F” from the Ville II. [less ▲]

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See detailA comparison of serial order short-term memory effects across verbal and musical domains
Gorin, Simon ULiege; Mengal, Pierre; Majerus, Steve ULiege

in Memory & Cognition (in press)

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See detailPsychological interventions influence patients' attitudes and beliefs about their chronic pain.
VANHAUDENHUYSE, Audrey ULiege; Gillet, Aline; MALAISE, Nicole ULiege et al

in Journal of Traditional and Complementary Medicine (in press)

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See detailSupervised detection of exoplanets in high-contrast imaging sequences
Gómez González, Carlos ULiege; Absil, Olivier ULiege; Van Droogenbroeck, Marc ULiege

in Astronomy and Astrophysics (in press)

Context. Post-processing algorithms play a key role in pushing the detection limits of high-contrast imaging (HCI) instruments. State-of-the-art image processing approaches for HCI enable the production ... [more ▼]

Context. Post-processing algorithms play a key role in pushing the detection limits of high-contrast imaging (HCI) instruments. State-of-the-art image processing approaches for HCI enable the production of science-ready images relying on unsupervised learning techniques, such as low-rank approximations, for generating a model point spread function (PSF) and subtracting the residual starlight and speckle noise. Aims. In order to maximize the detection rate of HCI instruments and survey campaigns, advanced algorithms with higher sensitivities to faint companions are needed, especially for the speckle-dominated innermost region of the images. Methods. We propose a reformulation of the exoplanet detection task (for ADI sequences) that builds on well-established machine learning techniques to take HCI post-processing from an unsupervised to a supervised learning context. In this new framework, we present algorithmic solutions using two different discriminative models: SODIRF (random forests) and SODINN (neural networks). We test these algorithms on real ADI datasets from VLT/NACO and VLT/SPHERE HCI instruments. We then assess their performances by injecting fake companions and using receiver operating characteristic analysis. This is done in comparison with state-of-the-art ADI algorithms, such as ADI principal component analysis (ADI-PCA). Results. This study shows the improved sensitivity versus specificity trade-off of the proposed supervised detection approach. At the diffraction limit, SODINN improves the true positive rate by a factor ranging from ∼2 to ∼10 (depending on the dataset and angular separation) with respect to ADI-PCA when working at the same false-positive level. Conclusions. The proposed supervised detection framework outperforms state-of-the-art techniques in the task of discriminating planet signal from speckles. In addition, it offers the possibility of re-processing existing HCI databases to maximize their scientific return and potentially improve the demographics of directly imaged exoplanets. [less ▲]

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