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See detailPB 8783: the first sdO star suitable for asteroseismic modeling?
Van Grootel, Valérie ULiege; Randall, Suzanna K.; Latour, Marilyn et al

E-print/Working paper (in press)

Pulsating hot B subdwarfs (sdB) have become one of the showcases of asteroseismology. Thanks to the combination of rich observed pulsation spectra and state-of-the-art modeling tools it is possible to ... [more ▼]

Pulsating hot B subdwarfs (sdB) have become one of the showcases of asteroseismology. Thanks to the combination of rich observed pulsation spectra and state-of-the-art modeling tools it is possible to tightly constrain fundamental parameters such as the stellar mass for these compact, evolved objects in the core He-burning phase of evolution. In comparison, the exploitation of sdO pulsators - hotter stars thought to be in a more advanced evolutionary stage - is still in its infancy. While a small number have been identified in Globular Clusters (GCs), they are extremely rare among the field population. It was recently suggested that PB8783, one of the very first sdB pulsators discovered in 1997, may in fact be an unrecognized hot sdO star with very similar properties to the GC sdO pulsators. Here, we present new very high-quality spectroscopy as well as an asteroseismic analysis of this star with the aim of solving the mystery of its nature. [less ▲]

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See detailOn the construction of large Algebra not contained in the image of the Borel map
Esser, Céline ULiege; Schindl, Gerhard

E-print/Working paper (2019)

The Borel map j∞ takes germs at 0 of smooth functions to the sequence of iterated partial derivatives at 0. It is well known that the restriction of j∞ to the germs of quasianalytic ultradifferentiable ... [more ▼]

The Borel map j∞ takes germs at 0 of smooth functions to the sequence of iterated partial derivatives at 0. It is well known that the restriction of j∞ to the germs of quasianalytic ultradifferentiable classes which are strictly containing the real analytic functions can never be onto the corresponding sequence space. In a recent paper the authors have studied the size of the image of j∞ by using different approaches and worked in the general setting of quasianalytic ultradifferentiable classes defined by weight matrices. The aim of this paper is to show that the image of j∞ is also small with respect to the notion of algebrability and we treat both the Cauchy product (convolution) and the pointwise product. In particular, a deep study of the stability of the considered spaces under the pointwise product is developed. [less ▲]

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See detailTwo new HATNet hot Jupiters around A stars, and the first glimpse at the occurrence rate of hot Jupiters from TESS
Zhou, G.; Huang, C.; Bakos, G. et al

E-print/Working paper (2019)

Wide field surveys for transiting planets are well suited to searching diverse stellar populations, enabling a better understanding of the link between the properties of planets and their parent stars. We ... [more ▼]

Wide field surveys for transiting planets are well suited to searching diverse stellar populations, enabling a better understanding of the link between the properties of planets and their parent stars. We report the discovery of HAT-P-69 b (TOI 625.01) and HAT-P-70 b (TOI 624.01), two new hot Jupiters around A stars from the HATNet survey which have also been observed by the Transiting Exoplanet Survey Satellite (TESS). HAT-P-69 b has a mass of 3.73 (+0.61/-0.59) Mjup and a radius of 1.626 (+0.032/-0.025) Rjup, and is in a prograde 4.79-day orbit around a star of mass 1.698+/-0.025 Msun and radius 1.854 (+0.043/-0.022) Rsun. HAT-P-70 b has a radius of 1.87 (+0.15/-0.10) Rjup and a mass constraint of <6.78 (3sigma) Mjup, and is in a retrograde 2.74-day orbit around a star of mass 1.890 (+0.010/-0.013) Msun and radius 1.858 (+0.119/-0.091) Rsun. We use the confirmation of these planets around relatively massive stars as an opportunity to explore the occurrence rate of hot Jupiters as a function of stellar mass. We define a sample of 47,126 main-sequence stars brighter than Tmag=10 that yields 31 giant planet candidates, including 18 confirmed planets, 3 candidates, and 10 false positives. We find a net hot Jupiter occurrence rate of 0.45+/-0.10% within this sample, consistent with the rate measured by Kepler for FGK stars. When divided into stellar mass bins, we find the occurrence rate to be 0.71+/-0.31% G stars, 0.43+/-0.15% for F stars, and 0.32+/-0.12% for A stars. Thus, at this point, we cannot discern any statistically significant trend in the occurrence of hot Jupiters with stellar mass. [less ▲]

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See detailRapid visualization of chemically related compounds using Kendrick mass defect as a filter in mass spectrometry imaging
Kune, Christopher ULiege; Mc Cann, Andréa ULiege; La Rocca, Raphaël ULiege et al

E-print/Working paper (2019)

Kendrick mass defect (KMD) analysis is widely used for helping the detection and identification of chemically related compounds based on exact mass measurements. We report here the use of KMD as a ... [more ▼]

Kendrick mass defect (KMD) analysis is widely used for helping the detection and identification of chemically related compounds based on exact mass measurements. We report here the use of KMD as a criterion for filtering complex mass spectrometry data. The method enables an automated, faster and efficient data processing, enabling the reconstruction of 2D distributions of family of homologous compound in MSI images. We show that the KMD filtering, based on a homemade software, is suitable for low resolution and high resolution MSI data. This method has been successfully applied to two different types of samples, bacteria co-cultures and brain tissue section. [less ▲]

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See detailUnveiling two new trichome-specific promoters of interest for metabolic engineering in Nicotiana tabacum
Pottier, Mathieu ULiege; Laterre, Raphaëlle; Van Wessem, Astrid et al

E-print/Working paper (2019)

Nicotiana tabacum has emerged as a suitable host for metabolic engineering of terpenoids and derivatives in tall glandular trichomes, which actively synthesize and secrete specialized metabolites. However ... [more ▼]

Nicotiana tabacum has emerged as a suitable host for metabolic engineering of terpenoids and derivatives in tall glandular trichomes, which actively synthesize and secrete specialized metabolites. However, implementation of an entire biosynthetic pathway in glandular trichomes requires the identification of trichome-specific promoters to appropriately drive the expression of the transgenes needed to set up the desired pathway. In this context, RT-qPCR analysis was carried out on wild-type N. tabacum plants to compare the expression pattern and level of NtRbS-T1 and NtMALD1, two newly identified genes expressed in glandular trichomes, with those of NtCYP71D16, NtCBTS2α, NtCPS2, NtLTP1, which were reported in the literature to be specifically expressed in glandular trichomes. The latter were previously investigated separately, preventing any accurate comparison of their expression level. We show that NtRbcS-T1 and NtMALD1 are specifically expressed in glandular trichomes just like NtCYP71D16, NtCBTS2α, NtCPS2, while NtLTP1 was also expressed in other leaf tissues as well as in the stem. Transcriptional fusions of all six promoters to the GUS-VENUS reporter gene were introduced in N. tabacum by Agrobacterium-mediated transformation. Most transgenic lines displayed GUS activity in tall glandular trichomes. In some transgenic lines, except for pNtLTP1:GUS-VENUS, this expression was specific. In other transgenic lines, GUS expression was extended to other tissues, probably resulting from a position effect during transgene integration. We discuss alternatives to overcome this lack of tissue specificity in some transgenic lines, should some of these promoters be used in the context of metabolic engineering in N. tabacum. [less ▲]

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See detailPanamá debe diseñar una hoja de ruta clara frente a China
Wintgens, Sophie ULiege

E-print/Working paper (2019)

Conceder prioridad a los intereses nacionales, diversificar los socios comerciales, defender la posición de Panamá como país neutral y fortalecer la democracia, son algunos aspectos que Panamá debe ... [more ▼]

Conceder prioridad a los intereses nacionales, diversificar los socios comerciales, defender la posición de Panamá como país neutral y fortalecer la democracia, son algunos aspectos que Panamá debe considerar para beneficiarse de la relación con China “sin perder soberanía”. [less ▲]

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See detailWill Deliveroo and Uber be captured by the proposed EU platform Regulation? You’d better watch out…
Van Cleynenbreugel, Pieter ULiege

E-print/Working paper (2019)

An analysis as to why Uber and Deliveroo could be excluded from the scope of application of the envisaged EU platform Regulation

Detailed reference viewed: 41 (4 ULiège)
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See detailLikelihood-free MCMC with Approximate Likelihood Ratios
Hermans, Joeri ULiege; Begy, Volodimir; Louppe, Gilles ULiege

E-print/Working paper (2019)

We propose a novel approach for posterior sampling with intractable likelihoods. This is an increasingly important problem in scientific applications where models are implemented as sophisticated computer ... [more ▼]

We propose a novel approach for posterior sampling with intractable likelihoods. This is an increasingly important problem in scientific applications where models are implemented as sophisticated computer simulations. As a result, tractable densities are not available, which forces practitioners to rely on approximations during inference. We address the intractability of densities by training a parameterized classifier whose output is used to approximate likelihood ratios between arbitrary model parameters. In turn, we are able to draw posterior samples by plugging this approximator into common Markov chain Monte Carlo samplers such as Metropolis-Hastings and Hamiltonian Monte Carlo. We demonstrate the proposed technique by fitting the generating parameters of implicit models, ranging from a linear probabilistic model to settings in high energy physics with high-dimensional observations. Finally, we discuss several diagnostics to assess the quality of the posterior. [less ▲]

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See detailRemembering Jean-Pierre Bourguignon, MD, PhD
Parent, Anne-Simone ULiege; Zoeller, R. Thomas; Geenen, Vincent ULiege et al

E-print/Working paper (2019)

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See detailIntroducing neuromodulation in deep neural networks to learn adaptive behaviours
Vecoven, Nicolas ULiege; Ernst, Damien ULiege; Wehenkel, Antoine ULiege et al

E-print/Working paper (2019)

In this paper, we propose a new deep neural network architecture, called NMD net, that has been specifically designed to learn adaptive behaviours. This architecture exploits a biological mechanism called ... [more ▼]

In this paper, we propose a new deep neural network architecture, called NMD net, that has been specifically designed to learn adaptive behaviours. This architecture exploits a biological mechanism called neuromodulation that sustains adaptation in biological organisms. This architecture has been introduced in a deep-reinforcement learning architecture for interacting with Markov decision processes in a meta-reinforcement learning setting where the action space is continuous. The deep-reinforcement learning architecture is trained using an advantage actor-critic algorithm. Experiments are carried on several test problems. Results show that the neural network architecture with neuromodulation provides significantly better results than state-of-the-art recurrent neural networks which do not exploit this mechanism. [less ▲]

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See detailReport on HOSTS survey return
Ertel, Steve; Hinz, Phil; Mennesson, Bertrand et al

E-print/Working paper (2019)

Observations for the HOSTS (Hunt for Observable Signatures of Terrestrial Systems) survey for warm dust around nearby stars (exozodiacal dust, i.e., dust in and near their habitable zones, HZs) have been ... [more ▼]

Observations for the HOSTS (Hunt for Observable Signatures of Terrestrial Systems) survey for warm dust around nearby stars (exozodiacal dust, i.e., dust in and near their habitable zones, HZs) have been completed in the first half of 2018 (during observing semester 2018A). The goal of HOSTS was to constrain the occurrence rate and typical level of exozodiacal dust around a sample of nearby starsin order to assess the risk imposed by this dust to future space missions attempting to directly image habitable exoplanets. We here report on the immediate conclusions of the survey relevant to this goal.Detailed descriptions of the HOSTS observing strategy, data reduction, and analysis together with detailed statistical results were provided by Ertel et al. (2018a). Here, we provide only a brief summary of these points and updates where necessary. In particular, we provide the final null measurements and derived HZ dust levels (zodi levels) for all observed stars and final statistics derived from those measurements. [less ▲]

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See detailL’Institut de Botanique de l'ULiège : Transformation d'une ancienne façade en béton brut en une façade en bois de réemploi
Prégardien, Michel ULiege; Marique, Anne-Françoise ULiege

E-print/Working paper (2019)

Rénover en rémploi : présentation du projet de rénovation énergétique et patrimoniale de l'Institut de Botanique de l'ULiège

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See detailBCCM/ULC Cyanobacteria culture collection at the University of Liège (ISO9001 certified). Version 1.5. SCAR - Microbial Antarctic Resource System. Occurrence dataset
Wilmotte, Annick ULiege; Beets, Kim ULiege; Sweetlove, Maxime

E-print/Working paper (2019)

Catalogue of cyanobacterial strains of the BCCM/ULC collection with metadata, formatted to be deposited in GBIF by Maxime Sweetlove (SCAR Antarctic Biodiversity Database)

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See detailLa tour d'ivoire et la marée de merde: sur un texte de Simon Leys et son actualité
Thirion, Nicolas ULiege

E-print/Working paper (2019)

Le décret « définissant le paysage de l’enseignement supérieur et l’organisation académique des études », mieux connu sous l’appellation de « décret Paysage », constitue la traduction presque parfaite ... [more ▼]

Le décret « définissant le paysage de l’enseignement supérieur et l’organisation académique des études », mieux connu sous l’appellation de « décret Paysage », constitue la traduction presque parfaite, dans les limites de la Communauté française de Belgique, de certaines dérives qui affectent l’institution universitaire un peu partout dans le monde depuis un quart de siècle environ et qui, toutes, proviennent de deux tendances lourdes: l’utilitarisme à courte vue, d’un côté ; la démagogie racoleuse, de l’autre. Ce faisant, le décret "Paysage" consacre une vision de l’Université et, plus largement, de l’enseignement supérieur à contre-courant des principes et des croyances qui les ont fondés et les irriguaient encore jusqu’il y a peu. [less ▲]

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See detailGeorge Orwell: 1984
Belleflamme, Clémence ULiege

E-print/Working paper (2019)

Résumé apéritif du roman de George Orwell intitulé 1984 (1949), rédigé dans le cadre du dossier "Les lectures pour l'été 2019" de la revue Culture.

Detailed reference viewed: 10 (1 ULiège)
Peer Reviewed
See detailJobart, Marthe
Piront, Julie ULiege

E-print/Working paper (2019)

Notice de dictionnaire consacrée à Marthe Jobart (1645-1717), en religion sœur Madeleine Thérèse de Saint-Joseph, carmélite déchaussée au premier monastère de Nancy, religieuse architecte.

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See detailLambillion, Marie Anne
Piront, Julie ULiege

E-print/Working paper (2019)

Notice de dictionnaire consacrée à Marie Anne Lambillion (1658-1748), en religion soeur Marie Anne Joseph, bénédictine de la Paix Notre-Dame à Namur, religieuse architecte.

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See detailRecurrence along directions in multidimensional words
Charlier, Emilie ULiege; Puzynina, Svetlana; Vandomme, Elise ULiege

E-print/Working paper (2019)

In this paper we introduce and study new notions of uniform recurrence in multidimensional words. A d-dimensional word is called uniformly recurrent if for all s_1,...,s_d, there exists n such that each ... [more ▼]

In this paper we introduce and study new notions of uniform recurrence in multidimensional words. A d-dimensional word is called uniformly recurrent if for all s_1,...,s_d, there exists n such that each block of size (n,…,n) contains the prefix of size (s1,…,sd). We are interested in a modification of this property. Namely, we ask that for each rational direction (q_1,…,q_d), each rectangular prefix occurs along this direction in positions ℓ(q1,…,qd) with bounded gaps. Such words are called uniformly recurrent along all directions. We provide several constructions of multidimensional words satisfying this condition, and more generally, a series of four increasingly stronger conditions. In particular, we study the uniform recurrence along directions of multidimentional rotation words and of fixed points of square morphisms. [less ▲]

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See detailClassification of load forecasting studies by forecasting problem to select load forecasting techniques and methodologies
Dumas, Jonathan ULiege; Cornélusse, Bertrand ULiege

E-print/Working paper (2018)

This article proposes a two-dimensional classification methodology to select the relevant forecasting tools developed by the scientific community based on a classification of load forecasting studies. The ... [more ▼]

This article proposes a two-dimensional classification methodology to select the relevant forecasting tools developed by the scientific community based on a classification of load forecasting studies. The inputs of the classifier are the articles of the literature and the outputs are articles classified into categories. The classification process relies on two couple of parameters that defines a forecasting problem. The temporal couple is the forecasting horizon and the forecasting resolution. The system couple is the system size and the load resolution. Each article is classified with key information about the dataset used and the forecasting tools implemented: the forecasting techniques (probabilistic or deterministic) and methodologies, the cleansing data techniques and the error metrics. This process is illustrated by reviewing and classifying thirty-four articles. [less ▲]

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See detailComputing the k-binomial complexity of the Thue–Morse word
Lejeune, Marie ULiege; Leroy, Julien ULiege; Rigo, Michel ULiege

E-print/Working paper (2018)

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See detailThe discovery of WASP-134b, WASP-134c, WASP-137b, WASP-143b and WASP-146b: three hot Jupiters and a pair of warm Jupiters orbiting Solar-type stars
Anderson, D. R.; Bouchy, F.; Brown, D. J. A. et al

E-print/Working paper (2018)

We report the discovery by WASP of five planets orbiting moderately bright ($V$ = 11.0-12.9) Solar-type stars. WASP-137b, WASP-143b and WASP-146b are typical hot Jupiters in orbits of 3-4 d and with ... [more ▼]

We report the discovery by WASP of five planets orbiting moderately bright ($V$ = 11.0-12.9) Solar-type stars. WASP-137b, WASP-143b and WASP-146b are typical hot Jupiters in orbits of 3-4 d and with masses in the range 0.68--1.11 $M_{\rm Jup}$. WASP-134 is a metal-rich ([Fe/H] = +0.40 $\pm$ 0.07]) G4 star orbited by two warm Jupiters: WASP-134b ($M_{\rm pl}$ = 1.41 $M_{\rm Jup}$; $P = 10.1$ d; $e = 0.15 \pm 0.01$; $T_{\rm eql}$ = 950 K) and WASP-134c ($M_{\rm pl} \sin i$ = 0.70 $M_{\rm Jup}$; $P = 70.0$ d; $e = 0.17 \pm 0.09$; $T_{\rm eql}$ = 500 K). From observations of the Rossiter-McLaughlin effect of WASP-134b, we find its orbit to be misaligned with the spin of its star ($\lambda = -44 \pm 10^\circ$). WASP-134 is a rare example of a system with a short-period giant planet and a nearby giant companion. In-situ formation or disc migration seem more likely explanations for such systems than does high-eccentricity migration. [less ▲]

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See detailCritical Time Windows for Renewable Resource Complementarity Assessment
Berger, Mathias ULiege; Radu, David-Constantin ULiege; Fonteneau, Raphaël ULiege et al

E-print/Working paper (2018)

This paper proposes a systematic framework to assess the complementarity of renewable resources over arbitrary geographical scopes and temporal scales which is particularly well-suited to exploit very ... [more ▼]

This paper proposes a systematic framework to assess the complementarity of renewable resources over arbitrary geographical scopes and temporal scales which is particularly well-suited to exploit very large data sets of climatological data. The concept of critical time windows is introduced, and a spatio-temporal criticality indicator is proposed, consisting in a parametrised family of scalar indicators quantifying the complementarity between renewable resources in both space and time. The criticality indicator is leveraged to devise a family of optimisation problems identifying sets of locations with maximum complementarity under arbitrary geographical deployment constraints. The applicability of the framework is shown in a case study investigating the complementarity between the wind regimes in continental western Europe and southern Greenland, and its usefulness in a power system planning context is demonstrated. Besides showing that the occurrence of low wind power production events can be significantly reduced on a regional scale by exploiting diversity in local wind patterns, results highlight the fact that aggregating wind power production sites located on different continents may result in a lower occurrence of system-wide low wind power production events and indicate potential benefits of intercontinental electrical interconnections. [less ▲]

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See detailSchéma de Développement Territorial de la Grande Région - CAHIER THEMATIQUE N°3 : Développement économique
Lambotte, Jean-Marc ULiege; Dupont, Xavier; Gathon, Henry-Jean ULiege et al

E-print/Working paper (2018)

L’action 3 du projet Interreg SDT GR intitulé « Constituer un socle de connaissances partagé et un langage commun » vise à fournir un éclairage multithématique sur le territoire de la Grande Région ... [more ▼]

L’action 3 du projet Interreg SDT GR intitulé « Constituer un socle de connaissances partagé et un langage commun » vise à fournir un éclairage multithématique sur le territoire de la Grande Région. Quatre thèmes ont été identifiés et sont déclinés dans un cahier spécifique. Un cinquième cahier retranscrira la synthèse des deux ateliers réunissant l’ensemble des acteurs clefs de la Grande région pour identifier les enjeux sectoriels et transversaux du développement territorial futur de la Grande Région (risques et opportunité). - Cahier thématique n°1 : Dynamiques démographiques et les besoins territoriaux associés - Cahier thématique n°2 : Mobilité - Cahier thématique n°3 : Développement économique - Cahier thématique n°4 : Environnement-Energie - Cahier synthétique n°5 : Enjeux du développement territorial de la Grande Région [less ▲]

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See detailLa République du Kosovo : le plus jeune Etat d’Europe
Lika, Liridon ULiege

E-print/Working paper (2018)

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See detailRaumentwicklungskonzept der Großregion - THEMENHEFT Nr.3 : Wirtschaftliche Entwicklung
Lambotte, Jean-Marc ULiege; Dupont, Xavier; Gathon, Henry-Jean ULiege et al

E-print/Working paper (2018)

Die Aktion 3 des Interreg Projektes SDT GR mit dem Namen « Eine breite Grundlage an geteiltem Wissen sowie eine gemeinsame Sprache schaffen » zielt darauf ab, eine multithematische Sicht auf das Gebiet ... [more ▼]

Die Aktion 3 des Interreg Projektes SDT GR mit dem Namen « Eine breite Grundlage an geteiltem Wissen sowie eine gemeinsame Sprache schaffen » zielt darauf ab, eine multithematische Sicht auf das Gebiet der Großregion zu bieten. Vier Themen wurden erkannt und werden jeweils in einem spezifischen Heft ausgearbeitet. Ein fünftes Heft gibt die Synthese der beiden Ateliers wieder, die die Gesamtheit der Schlüssel-Akteure der Großregion vereinigten, um die sektoriellen und transversalen Herausforderungen der künftigen territorialen Entwicklung zu bestimmen (Risiken und Opportunitäten). - Themenheft Nr. 1 : Bevölkerungsdynamiken und verbundene territoriale Erfordernisse - Themenheft Nr. 2 : Mobilität - Themenheft Nr. 3 : Wirtschaftliche Entwicklung - Themenheft Nr. 4 : Umwelt – Energie - Zusammenfassendes Heft Nr. 5 : Herausforderungen der territorialen Entwicklung der Großregion [less ▲]

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See detailSchéma de Développement Territorial de la Grande Région - CAHIER THEMATIQUE N°4 : Environnement et énergie
Godart, Marie-Françoise; Castiau, Etienne; Verelst, Simon et al

E-print/Working paper (2018)

L’action 3 du projet Interreg SDT GR intitulé « Constituer un socle de connaissances partagé et un langage commun » vise à fournir un éclairage multithématique sur le territoire de la Grande Région ... [more ▼]

L’action 3 du projet Interreg SDT GR intitulé « Constituer un socle de connaissances partagé et un langage commun » vise à fournir un éclairage multithématique sur le territoire de la Grande Région. Quatre thèmes ont été identifiés et sont déclinés dans un cahier spécifique. Un cinquième cahier retranscrit la synthèse des deux ateliers réunissant l’ensemble des acteurs clefs de la Grande région pour identifier les enjeux sectoriels et transversaux du développement territorial futur de la Grande Région (risques et opportunités). - Cahier thématique n°1 : Dynamiques démographiques et les besoins territoriaux associés - Cahier thématique n°2 : Mobilité des personnes et des marchandises - Cahier thématique n°3 : Développement économique - Cahier thématique n°4 : Environnement et énergie - Cahier synthétique n°5 : Enjeux du développement territorial de la Grande Région [less ▲]

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See detailRaumentwicklungskonzept der Großregion - THEMENHEFT Nr. 4 : Umwelt und Energie
Godart, Marie-Françoise; Castiau, Etienne; Verelst, Simon et al

E-print/Working paper (2018)

Die Aktion 3 des Interreg Projektes SDT GR mit dem Namen « Eine breite Grundlage an geteiltem Wissen sowie eine gemeinsame Sprache schaffen » zielt darauf ab, eine multithematische Sicht auf das Gebiet ... [more ▼]

Die Aktion 3 des Interreg Projektes SDT GR mit dem Namen « Eine breite Grundlage an geteiltem Wissen sowie eine gemeinsame Sprache schaffen » zielt darauf ab, eine multithematische Sicht auf das Gebiet der Großregion zu bieten. Vier Themen wurden erkannt und werden jeweils in einem spezifischen Heft ausgearbeitet. Ein fünftes Heft gibt die Synthese der beiden Ateliers wieder, die die Gesamtheit der Schlüssel-Akteure der Großregion vereinigten, um die sektoriellen und transversalen Herausforderungen der künftigen territorialen Entwicklung zu bestimmen (Risiken und Opportunitäten). - Themenheft Nr. 1 : Bevölkerungsdynamiken und verbundene territoriale Erfordernisse - Themenheft Nr. 2 : Mobilität - Themenheft Nr. 3 : Wirtschaftliche Entwicklung - Themenheft Nr. 4 : Umwelt und Energie - Zusammenfassendes Heft Nr. 5 : Herausforderungen der territorialen Entwicklung der Großregion [less ▲]

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See detailSchéma de Développement Territorial de la Grande Région - CAHIER THEMATIQUE N°2 : Mobilité des personnes et des marchandise
Malherbe, Alain; Grandjean, Martin; Leclercq, Alexandre et al

E-print/Working paper (2018)

L’action 3 du projet Interreg SDT GR intitulé « Constituer un socle de connaissances partagé et un langage commun » vise à fournir un éclairage multithématique sur le territoire de la Grande Région ... [more ▼]

L’action 3 du projet Interreg SDT GR intitulé « Constituer un socle de connaissances partagé et un langage commun » vise à fournir un éclairage multithématique sur le territoire de la Grande Région. Quatre thèmes ont été identifiés et sont déclinés dans un cahier spécifique. Un cinquième cahier retranscrira la synthèse des deux ateliers réunissant l’ensemble des acteurs clefs de la Grande région pour identifier les enjeux sectoriels et transversaux du développement territorial futur de la Grande Région (risques et opportunité). - Cahier thématique n°1 : Dynamique démographique et les besoins territoriaux associés - Cahier thématique n°2 : Mobilité des personnes et des marchandises - Cahier thématique n°3 : Développement économique - Cahier thématique n°4 : Environnement-énergie - Cahier synthétique n°5 : Enjeux du développement territorial de la Grande Région [less ▲]

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See detailRaumentwicklungskonzept der Großregion - THEMENHEFT Nr. 1 : Demographische Dynamik und damit verbundene räumliche Erfordernisse
Durand, Frédéric; Lamour, Christian; Raimbault, Nicolas et al

E-print/Working paper (2018)

Die Aktion 3 des Interreg-Projektes REK GR mit dem Namen « Eine gemeinsam genutzte Wissensbasis und eine gemeinsame Sprache entwickeln » zielt darauf ab, das Gebiet der Großregion aus Sicht mehrerer ... [more ▼]

Die Aktion 3 des Interreg-Projektes REK GR mit dem Namen « Eine gemeinsam genutzte Wissensbasis und eine gemeinsame Sprache entwickeln » zielt darauf ab, das Gebiet der Großregion aus Sicht mehrerer Themen zu beleuchten. Vier Themen wurden festgehalten und werden jeweils in einem spezifischen Heft ausgearbeitet. Ein fünftes Heft fasst die beiden Workshops zusammen, an denen alle Schlüsselakteure der Großregion beteiligt waren, um die sektoriellen und bereichsübergreifenden Herausforderungen der künftigen territorialen Entwicklung zu bestimmen (Risiken und Chancen). - Themenheft Nr. 1: Demographische Dynamik und damit verbundene räumliche Erfordernisse - Themenheft Nr. 2: Mobilität von Personen und Gütern - Themenheft Nr. 3: Wirtschaftliche Entwicklung - Themenheft Nr. 4: Umwelt – Energie - Zusammenfassendes Heft Nr. 5: Herausforderungen der territorialen Entwicklung der Großregion [less ▲]

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See detailSchéma de Développement Territorial de la Grande Région - CAHIER THEMATIQUE N°1 : Dynamiques démographiques et les besoins territoriaux associés
Durand, Frédéric; Lamour, Christian; Raimbault, Nicolas et al

E-print/Working paper (2018)

L’action 3 du projet Interreg SDT GR intitulé « Constituer un socle de connaissances partagé et un langage commun » vise à fournir un éclairage multithématique sur le territoire de la Grande Région ... [more ▼]

L’action 3 du projet Interreg SDT GR intitulé « Constituer un socle de connaissances partagé et un langage commun » vise à fournir un éclairage multithématique sur le territoire de la Grande Région. Quatre thèmes ont été identifiés et sont déclinés dans un cahier spécifique. Un cinquième cahier retranscrit la synthèse des deux ateliers réunissant l’ensemble des acteurs clefs de la Grande Région pour identifier les enjeux sectoriels et transversaux du développement territorial futur de la Grande Région (risques et opportunités). - Cahier thématique n°1 : Dynamiques démographiques et les besoins territoriaux associés - Cahier thématique n°2 : Mobilité des personnes et des marchandises - Cahier thématique n°3 : Développement économique - Cahier thématique n°4 : Environnement – Energie - Cahier synthétique n°5 : Enjeux du développement territorial de la Grande Région [less ▲]

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See detailRésultats actuels en matière de recherche sur les thématiques de la mobilité, des infrastructures de transports et des transports publics
Caesar, Beate; Lambotte, Jean-Marc ULiege

E-print/Working paper (2018)

25Le présent rapport de synthèse s‘articule en trois parties qui se basent sur les résultats de deux projets de recherche actuels : dans un premier temps, nous traiterons de la thématique de la ... [more ▼]

25Le présent rapport de synthèse s‘articule en trois parties qui se basent sur les résultats de deux projets de recherche actuels : dans un premier temps, nous traiterons de la thématique de la répartition spatiale des flux transfrontaliers de transport dans la Grande Région ainsi que de leur interdépendance avec les trans-ports individuels motorisés. Ensuite nous présenterons un échantillon des résultats de recherche sur l‘influence de deux politiques européennes, celle duréseau transeuropéen de transport(RTE-T) et celui de la coopération territoriale européenne (CTE), sur les transports transfrontaliers. La troisième partie du rapport sera consacrée aux défis qui se présentent pour la Grande Région dans les domaines des transports et de la mobilité sur la base de l‘analyse des résultats de recherche considérés comme importants pour la conception du futur développement territorial dans la Grande Région. [less ▲]

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See detailWASP-190b: Tomographic discovery of a transiting hot Jupiter
Temple, L. Y.; Hellier, C.; Anderson, D. R. et al

E-print/Working paper (2018)

We report the discovery of WASP-190b, an exoplanet on a 5.37-day orbit around an inflated F6 IV-V star with T_eff = 6400 $\pm$ 100 K, M$_{*}$ = 1.35 $\pm$ 0.05 M_sun and R$_{*}$ = 1.6 $\pm$ 0.1 R_sun. The ... [more ▼]

We report the discovery of WASP-190b, an exoplanet on a 5.37-day orbit around an inflated F6 IV-V star with T_eff = 6400 $\pm$ 100 K, M$_{*}$ = 1.35 $\pm$ 0.05 M_sun and R$_{*}$ = 1.6 $\pm$ 0.1 R_sun. The planet has a radius of R_p = 1.15 $\pm$ 0.09 R_Jup and a mass of M_p = 1.0 $\pm$ 0.1 M_Jup, making it a mildly inflated hot Jupiter. The orbit is also marginally misaligned with respect to the stellar rotation, with $\lambda$ = 21 $\pm$ 6$^{\circ}$ measured using Doppler tomography. We compare a Rossiter-McLaughlin analysis (involving radial velocity measurements) with the Doppler tomography method, and find that the latter provides a better constraint on $vsini_{*}$ and $\lambda$. [less ▲]

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See detailWASP-166b: a bloated super-Neptune transiting a V = 9 star
Hellier, Coel; Anderson, D. R.; Triaud, A. H. M. J. et al

E-print/Working paper (2018)

We report the discovery of WASP-166b, a super-Neptune planet with a mass of 0.1 Mjup and a bloated radius of 0.63 Rjup. It transits a V = 9.36, F9V star in a 5.44-d orbit that is aligned with the stellar ... [more ▼]

We report the discovery of WASP-166b, a super-Neptune planet with a mass of 0.1 Mjup and a bloated radius of 0.63 Rjup. It transits a V = 9.36, F9V star in a 5.44-d orbit that is aligned with the stellar rotation (lambda = -3 +/- 5 degrees). WASP-166b appears to be a rare object within the `Neptune desert'. The planet's low surface gravity and bright host star make it a promising target for atmospheric characterisation. There are variations in the radial-velocity measurements that might result from stellar magnetic activity. [less ▲]

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See detailLa tranquille pénétration chinoise en Amérique latine et Caraïbes
Kellner, Thierry; Wintgens, Sophie ULiege

E-print/Working paper (2018)

En 2008, la République populaire de Chine (RPC) publiait son premier Policy Paper définissant stratégiquement ses relations avec l’Amérique latine et les Caraïbes (ALC). Depuis, en l’espace d’une décennie ... [more ▼]

En 2008, la République populaire de Chine (RPC) publiait son premier Policy Paper définissant stratégiquement ses relations avec l’Amérique latine et les Caraïbes (ALC). Depuis, en l’espace d’une décennie, elle s’est affirmée comme un partenaire commercial et financier incontournable dans cette zone longtemps considérée comme l’arrière-cour de Washington. Pourtant, vus d’Europe, les intérêts et l’action de Pékin dans le sous-continent latino-américain restent encore largement méconnus, voire ignorés. Cet article a pour but d'en livrer un petit éclairage. [less ▲]

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See detailA low-density hot Jupiter in a near-aligned, 4.5-day orbit around a $V$ = 10.8, F5V star
Anderson, D. R.; Bouchy, F.; Brown, D. J. A. et al

E-print/Working paper (2018)

We report the independent discovery and characterisation of a hot Jupiter in a 4.5-d, transiting orbit around the star TYC 7282-1298-1 ($V$ = 10.8, F5V). The planet has been pursued by the NGTS team as ... [more ▼]

We report the independent discovery and characterisation of a hot Jupiter in a 4.5-d, transiting orbit around the star TYC 7282-1298-1 ($V$ = 10.8, F5V). The planet has been pursued by the NGTS team as NGTS-2b and by ourselves as WASP-179b. We characterised the system using a combination of photometry from WASP-South and TRAPPIST-South, and spectra from CORALIE (around the orbit) and HARPS (through the transit). We find the planet's orbit to be nearly aligned with its star's spin. From a detection of the Rossiter-McLaughlin effect, we measure a projected stellar obliquity of $\lambda = -19 \pm 6^\circ$. From line-profile tomography of the same spectra, we measure $\lambda = -11 \pm 5^\circ$. We find the planet to have a low density ($M_{\rm P}$ = 0.67 $\pm$ 0.09 $M_{\rm Jup}$, $R_{\rm P}$ = 1.54 $\pm$ 0.06 $R_{\rm Jup}$), which, along with its moderately bright host star, makes it a good target for transmission spectroscopy. We find a lower stellar mass ($M_*$ = $1.30 \pm 0.07$ $M_\odot$) than reported by the NGTS team ($M_*$ = $1.64 \pm 0.21$ $M_\odot$), though the difference is only $1.5$ $\sigma$. [less ▲]

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See detailWASP-189b: an ultra-hot Jupiter transiting the bright A star HR 5599 in a polar orbit
Anderson, D. R.; Temple, L. Y.; Nielsen, L. D. et al

E-print/Working paper (2018)

We report the discovery of WASP-189b: an ultra-hot Jupiter in a 2.72-d transiting orbit around the $V = 6.6$ A star WASP-189 (HR 5599). We detected periodic dimmings in the star's lightcurve, first with ... [more ▼]

We report the discovery of WASP-189b: an ultra-hot Jupiter in a 2.72-d transiting orbit around the $V = 6.6$ A star WASP-189 (HR 5599). We detected periodic dimmings in the star's lightcurve, first with the WASP-South survey facility then with the TRAPPIST-South telescope. We confirmed that a planet is the cause of those dimmings via line-profile tomography and radial-velocity measurements using the HARPS and CORALIE spectrographs. Those reveal WASP-189b to be an ultra-hot Jupiter ($M_{\rm P}$ = 2.13 $\pm$ 0.28 $M_{\rm Jup}$; $R_{\rm P}$ = 1.374 $\pm$ 0.082 $R_{\rm Jup}$) in a polar orbit ($\lambda = 89.3 \pm 1.4^\circ$; $\Psi = 90.0 \pm 5.8^\circ$) around a rapidly rotating A6IV-V star ($T_{\rm eff}$ = 8000 $\pm$ 100 K; $v_* \sin i_*$ $\approx$ 100 km\, s$^{-1}$). We calculate a predicted equilibrium temperature of $T_{\rm eql}$ = 2641 $\pm$ 34 K, assuming zero albedo and efficient redistribution, which is the third hottest for the known exoplanets. WASP-189 is the brightest known host of a transiting hot Jupiter and the third-brightest known host of any transiting exoplanet. We note that of the eight hot-Jupiter systems with $T_{\rm eff}$ $>$ 7000 K, seven have strongly misaligned orbits, and two of the three systems with $T_{\rm eff}$ $\geq$ 8000 K have polar orbits (the third is aligned). [less ▲]

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See detailNGTS-4b: A sub-Neptune Transiting in the Desert
West, Richard G.; Gillen, Edward; Bayliss, Daniel et al

E-print/Working paper (2018)

We report the discovery of NGTS-4b, a sub-Neptune-sized planet transiting a 13th magnitude K-dwarf in a 1.34d orbit. NGTS-4b has a mass M=$20.6\pm3.0$M_E and radius R=$3.18\pm0.26$R_E, which places it ... [more ▼]

We report the discovery of NGTS-4b, a sub-Neptune-sized planet transiting a 13th magnitude K-dwarf in a 1.34d orbit. NGTS-4b has a mass M=$20.6\pm3.0$M_E and radius R=$3.18\pm0.26$R_E, which places it well within the so-called "Neptunian Desert". The mean density of the planet ($3.45\pm0.95$g/cm^3) is consistent with a composition of 100% H$_2$O or a rocky core with a volatile envelope. NGTS-4b is likely to suffer significant mass loss due to relatively strong EUV/X-ray irradiation. Its survival in the Neptunian desert may be due to an unusually high core mass, or it may have avoided the most intense X-ray irradiation by migrating after the initial activity of its host star had subsided. With a transit depth of $0.13\pm0.02$%, NGTS-4b represents the shallowest transiting system ever discovered from the ground, and is the smallest planet discovered in a wide-field ground-based photometric survey. [less ▲]

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See detailOn the efficiency of decentralized decision-making in self-dispatch power systems
Petitet, Marie; Perrot, Marie; Mathieu, Sébastien ULiege et al

E-print/Working paper (2018)

This paper focuses on market design options for operational balancing management in self-dispatch electric power systems. In particular, it investigates the most relevant timing for the balancing gate ... [more ▼]

This paper focuses on market design options for operational balancing management in self-dispatch electric power systems. In particular, it investigates the most relevant timing for the balancing gate closure, when competitors can no longer modify their decisions on the setting of controllable assets and when this responsibility is simultaneously transferred to the system operator. This discussion is central in the development and implementation of the European Electricity Balancing Guideline. Based on a multi-level simulation tool with a realistic modelling of short-term power system operations including informational asymmetry between market participants and the system operator, this paper proposes the first quantitative assessment of reducing the balancing gate closure time from one hour to 15 minutes ahead of the imbalance settlement period. For different environments (energy mix, power plant capabilities, outages, etc…), the results highlight that postponing the balancing gate closure time from one hour to 15 minutes increases the operational cost of the system. Based on robust and scalable results, we show that this difference is mainly due to a better coordination of the available resources by the central decision maker. [less ▲]

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See detailStyle de citation 'Université de Liège - Droit' : Guide d'utilisation
Cordier, Quentin ULiege; Desseilles, François ULiege

E-print/Working paper (2018)

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See detailUne petite collection de livres d’emblèmes
De Marco, Rosa ULiege

E-print/Working paper (2018)

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See detailLikelihood-free inference with an improved cross-entropy estimator
Stoye, Markus; Brehmer, Johann; Louppe, Gilles ULiege et al

E-print/Working paper (2018)

We extend recent work (Brehmer, et. al., 2018) that use neural networks as surrogate models for likelihood-free inference. As in the previous work, we exploit the fact that the joint likelihood ratio and ... [more ▼]

We extend recent work (Brehmer, et. al., 2018) that use neural networks as surrogate models for likelihood-free inference. As in the previous work, we exploit the fact that the joint likelihood ratio and joint score, conditioned on both observed and latent variables, can often be extracted from an implicit generative model or simulator to augment the training data for these surrogate models. We show how this augmented training data can be used to provide a new cross-entropy estimator, which provides improved sample efficiency compared to previous loss functions exploiting this augmented training data. [less ▲]

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See detailSocial Security Incentives in Belgium:An Analysis of Four Decades of Change
Fraikin, Anne-Lore ULiege; Jousten, Alain ULiege; Lefebvre, Mathieu ULiege

E-print/Working paper (2018)

The paper traces labor market reforms over the last four decades. It provides estimates of retirement incentives for a selected set of typical worker profiles across time and socioeconomic groups and ... [more ▼]

The paper traces labor market reforms over the last four decades. It provides estimates of retirement incentives for a selected set of typical worker profiles across time and socioeconomic groups and links these series to the labor market performance in Belgium. The results show that the numerous retirement and social security program reforms have had a marked impact on incentives at the micro level. At the aggregate level, results are less clear-cut given the extreme diversity of programs and features in the Belgian institutional context. [less ▲]

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See detailEfficient Probabilistic Inference in the Quest for Physics Beyond the Standard Model
Gunes Baydin, Atilim; Heinrich, Lukas; Bhimji, Wahid et al

E-print/Working paper (2018)

We present a novel framework that enables efficient probabilistic inference in large-scale scientific models by allowing the execution of existing domain-specific simulators as probabilistic programs ... [more ▼]

We present a novel framework that enables efficient probabilistic inference in large-scale scientific models by allowing the execution of existing domain-specific simulators as probabilistic programs, resulting in highly interpretable posterior inference. Our framework is general purpose and scalable, and is based on a cross-platform probabilistic execution protocol through which an inference engine can control simulators in a language-agnostic way. We demonstrate the technique in particle physics, on a scientifically accurate simulation of the tau lepton decay, which is a key ingredient in establishing the properties of the Higgs boson. High-energy physics has a rich set of simulators based on quantum field theory and the interaction of particles in matter. We show how to use probabilistic programming to perform Bayesian inference in these existing simulator codebases directly, in particular conditioning on observable outputs from a simulated particle detector to directly produce an interpretable posterior distribution over decay pathways. Inference efficiency is achieved via inference compilation where a deep recurrent neural network is trained to parameterize proposal distributions and control the stochastic simulator in a sequential importance sampling scheme, at a fraction of the computational cost of Markov chain Monte Carlo sampling. [less ▲]

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See detailDeep generative models for fast shower simulation in ATLAS
The ATLAS collaboration; Louppe, Gilles ULiege

E-print/Working paper (2018)

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See detailLa desconfianza es la peor antivacunas
Jamoulle, Marc ULiege; Pizzanelli, Miguel

E-print/Working paper (2018)

La cuestión de la vacunación contra el virus del papiloma humano, es por el momento, objeto de intensas discusiones. Uno podría pensar a primera vista que se trata de una cuestión puramente médica y, por ... [more ▼]

La cuestión de la vacunación contra el virus del papiloma humano, es por el momento, objeto de intensas discusiones. Uno podría pensar a primera vista que se trata de una cuestión puramente médica y, por lo tanto, científica. Sin embargo no lo es. Veremos que se trata en primer lugar de una pregunta o problema de tipo sociológico, luego económico y político y finalmente de tipo científico. Este asunto es tan urticante que se le ha llamado “la primera guerra de vacunas” (1,2) Nuestro objetivo no es detallar la historia reciente de la vacuna, sino recordar algunos hechos interesantes. La protección de la población y los individuos ha sido siempre una de las preocupaciones de la medicina. Como los médicos lidian permanentemente con el tiempo, llegar antes de un evento es el objetivo de la prevención, a pesar de que los pacientes aún no estén enfermos o aún no se vean afectados por un daño potencial. Estamos hablando de prevención primaria. Las vacunas y el descubrimiento de la higiene del agua han sido uno de los descubrimientos históricos más importantes contra los eventos que han trastornado la esperanza de vida de los humanos. Pero es la naturaleza médica de la vacunación, sus aspectos protectores y preventivos que han afectado más a la población. [less ▲]

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See detailOn the Stylized Fact of the Firm Size Distribution
Artige, Lionel ULiege; Reginster, Alexandre ULiege

E-print/Working paper (2018)

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See detailRoland Barthes, moderne, antimoderne, postmoderne, après-moderne ?
Demoulin, Laurent ULiege

E-print/Working paper (2018)

Tentative de réponse à Antoine Compagnon qui considère dans Les Antimodernes de Joseph de Maistre à Roland Barthes (Gallimard, coll. Bibliothèques des idées, 2005) que Roland Barthes est un penseur ... [more ▼]

Tentative de réponse à Antoine Compagnon qui considère dans Les Antimodernes de Joseph de Maistre à Roland Barthes (Gallimard, coll. Bibliothèques des idées, 2005) que Roland Barthes est un penseur antimoderne. [less ▲]

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See detailEmancipations (#1)
Bianchi, Michaël ULiege

E-print/Working paper (2018)

L’architecture vivrait-elle un retour vers un engagement politique plus affirmé ? En considérant les thématiques des dernières biennales d’architecture de Venise ainsi que d’autres actualités, il est ... [more ▼]

L’architecture vivrait-elle un retour vers un engagement politique plus affirmé ? En considérant les thématiques des dernières biennales d’architecture de Venise ainsi que d’autres actualités, il est permis d’envisager cette hypothèse. [less ▲]

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See detailLes progrès en immunologie sont à la base des plus grands succès médicaux
Geenen, Vincent ULiege

E-print/Working paper (2018)

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See detailGradient Energy Matching for Distributed Asynchronous Gradient Descent
Hermans, Joeri ULiege; Louppe, Gilles ULiege

E-print/Working paper (2018)

Distributed asynchronous SGD has become widely used for deep learning in large-scale systems, but remains notorious for its instability when increasing the number of workers. In this work, we study the ... [more ▼]

Distributed asynchronous SGD has become widely used for deep learning in large-scale systems, but remains notorious for its instability when increasing the number of workers. In this work, we study the dynamics of distributed asynchronous SGD under the lens of Lagrangian mechanics. Using this description, we introduce the concept of energy to describe the optimization process and derive a sufficient condition ensuring its stability as long as the collective energy induced by the active workers remains below the energy of a target synchronous process. Making use of this criterion, we derive a stable distributed asynchronous optimization procedure, GEM, that estimates and maintains the energy of the asynchronous system below or equal to the energy of sequential SGD with momentum. Experimental results highlight the stability and speedup of GEM compared to existing schemes, even when scaling to one hundred asynchronous workers. Results also indicate better generalization compared to the targeted SGD with momentum. [less ▲]

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See detailInternet Archive, Google et l’édition clandestine mosane des Lumières
Droixhe, Daniel ULiege

E-print/Working paper (2018)

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See detailThree-dimensional cultured Liver-on-a-Chip with mature hepatocyte-like cells derived from human pluripotent stem cells
Kamei, Kenichiro; Yoshioka, Momoko; Terada, Shiho et al

E-print/Working paper (2018)

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See detailLa myopathie atypique
Votion, Dominique ULiege

E-print/Working paper (2018)

Detailed reference viewed: 14 (1 ULiège)
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See detailMining gold from implicit models to improve likelihood-free inference
Brehmer, Johann; Louppe, Gilles ULiege; Pavez, Juan et al

E-print/Working paper (2018)

Simulators often provide the best description of real-world phenomena; however, they also lead to challenging inverse problems because the density they implicitly define is often intractable. We present a ... [more ▼]

Simulators often provide the best description of real-world phenomena; however, they also lead to challenging inverse problems because the density they implicitly define is often intractable. We present a new suite of simulation-based inference techniques that go beyond the traditional Approximate Bayesian Computation approach, which struggles in a high-dimensional setting, and extend methods that use surrogate models based on neural networks. We show that additional information, such as the joint likelihood ratio and the joint score, can often be extracted from simulators and used to augment the training data for these surrogate models. Finally, we demonstrate that these new techniques are more sample efficient and provide higher-fidelity inference than traditional methods. [less ▲]

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See detailLarge-Scale Land Acquisitions for Agricultural Development in Myanmar: A Review of Past and Current Processes
San Thein; Diepart, Jean-Christophe ULiege; Hlwan Moe et al

E-print/Working paper (2018)

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See detailLes révolutionnaires, protecteurs du système ? Le Grand Soir est reporté à demain
Nossent, Jérôme ULiege

E-print/Working paper (2018)

En 1969, Georges Lavau, constitutionaliste et sociologue français, propose une analyse de la fonction du parti communiste français (PCF) dans une perspective systémique. Pour construire son modèle ... [more ▼]

En 1969, Georges Lavau, constitutionaliste et sociologue français, propose une analyse de la fonction du parti communiste français (PCF) dans une perspective systémique. Pour construire son modèle d’analyse, il s’inspire de l’approche de David Easton, notamment concernant la définition donnée de ce qu’est un système politique. Dans le prolongement de David Easton, Georges Lavau considère qu’un parti politique peut ou non contribuer au maintien du système politique en fonction des rôles qu’il endosse (volontairement ou indépendamment de sa volonté, voire inconsciemment). Partant, cette fois-ci de la typologie de Théodore Lowi qui assigne deux fonctions possibles à un parti politique, légitimation et stabilisation du système politique, d’une part, soutien des politiques publiques d’autre part, Georges Lavau propose une troisième fonction : la fonction tribunitienne. [less ▲]

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See detailCommuting within the EU? Take your Netflix content with you!
Van Cleynenbreugel, Pieter ULiege

E-print/Working paper (2018)

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See detailCustomer ratings as a vector for discrimination in employment relations? Pathways and pitfalls for legal remedies
Ducato, Rossana; Kullmann, Miriam; Rocca, Marco ULiege

E-print/Working paper (2018)

The use of customer ratings to evaluate worker performance is increasingly worrisome because of its widespread use in the gig-economy. As scholars in computer and social sciences denounce, this practice ... [more ▼]

The use of customer ratings to evaluate worker performance is increasingly worrisome because of its widespread use in the gig-economy. As scholars in computer and social sciences denounce, this practice entails the risk of producing discriminatory outcomes, by reproducing biases existing in society. By drawing an analogy with discriminatory practices adopted by an employer to satisfy its customers’ preferences, we propose a legal analysis of this phenomenon grounded in EU non-discrimination law. Thus, we first analyse the issues related to the application of non-discrimination law to (alleged) self-employed workers. Then, we address the lack of access for the individual worker to the data regarding customers’ ratings. We conclude by arguing that the use of customer ratings should be considered as a suspect criterion, while the current (EU) non-discrimination laws should be modernised through a clearer inclusion of (alleged) self-employed workers. [less ▲]

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Peer Reviewed
See detailThe effect of initial water distribution and spatial resolution on the interpretation of ERT monitoring of water infiltration in a landfill cover
Dumont, Gael; Pilaswki, Tamara; Hermans, Thomas et al

E-print/Working paper (2018)

Detailed reference viewed: 35 (7 ULiège)
See detailL’économie sur le sentier de la guerre : la bataille des normes
Wintgens, Sophie ULiege

E-print/Working paper (2018)

On entend souvent cette idée selon laquelle le monde se dérégularise mais en réalité, le monde a rarement connu une telle inflation de normes techniques, commerciales ou environnementales qui définissent ... [more ▼]

On entend souvent cette idée selon laquelle le monde se dérégularise mais en réalité, le monde a rarement connu une telle inflation de normes techniques, commerciales ou environnementales qui définissent les règles de l'économie. Alors à quoi ressemble cette bataille entre puissances normatives? [less ▲]

Detailed reference viewed: 46 (9 ULiège)
See detailLes politiques de mémoire, dans quels buts?
Nossent, Jérôme ULiege

E-print/Working paper (2018)

Une large question, fondamentale dans le cadre de nos sociétés contemporaines[4], est à l’origine des réflexions développées dans l’ouvrage : « À quoi servent les politiques de mémoire ? ». Les auteurs ... [more ▼]

Une large question, fondamentale dans le cadre de nos sociétés contemporaines[4], est à l’origine des réflexions développées dans l’ouvrage : « À quoi servent les politiques de mémoire ? ». Les auteurs définissent ces dernières comme des « actions qui, pour agir sur la société et ses membres, et les transformer, mobilisent le rappel du passé » (Gensburger et Lefranc, 2017, 15). Sont ainsi interrogées les intentions des initiateurs de politiques de mémoire, celles des porteurs de mémoire susceptibles de rejoindre ces initiatives et enfin, dans une certaine mesure, les effets de ces politiques. [less ▲]

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See detailSchéma de Développement du Territoire: Contribution de la CPDT à l'analyse contextuelle
Bianchet, Bruno ULiege; Hanin, Yves; Godart, Marie-Françoise et al

E-print/Working paper (2018)

This research note from the walloon Permanent Conference of Territorial Development (CPDT) presents the Conference's contributions to the territorial analysis prior to the implementation of the ... [more ▼]

This research note from the walloon Permanent Conference of Territorial Development (CPDT) presents the Conference's contributions to the territorial analysis prior to the implementation of the Development Plan for the Territory of Wallonia. [less ▲]

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See detailSeeking to regulate Uber? Why not rely on Article 101 TFEU...
Van Cleynenbreugel, Pieter ULiege

E-print/Working paper (2018)

Detailed reference viewed: 28 (3 ULiège)
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See detailEquilibrium selection and stability in dynamic core-periphery models with heterogeneous preferences
Delloye, Justin; Peeters, Dominique; Tharakan, Joseph ULiege

E-print/Working paper (2018)

Detailed reference viewed: 19 (5 ULiège)
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See detailTowards a Typology of Business Models in the Biotechnology Industry
Segers, Jean Pierre ULiege

E-print/Working paper (2018)

The purpose of this paper is to identify a selection of key business models - “typology” - applied in the biotechnology industry. The focus is on the differences between traditional/closed or stand-alone ... [more ▼]

The purpose of this paper is to identify a selection of key business models - “typology” - applied in the biotechnology industry. The focus is on the differences between traditional/closed or stand-alone business models opposed to open or networked business models. A number of illustrative case studies and good practices are presented to show that new biotechnology firms are gradually adopting a “best of both worlds” strategy, with both closed business models and open, networked models as a way for gaining access to the market, in close collaboration with large global pharmaceutical companies. The case firms and good practices are taken from a recent country study for Belgium. [less ▲]

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See detailThe First Post-Kepler Brightness Dips of KIC 8462852
Boyajian, Tabetha S.; Alonso, Roi; Ammerman, Alex et al

E-print/Working paper (2018)

We present a photometric detection of the first brightness dips of the unique variable star KIC 8462852 since the end of the Kepler space mission in 2013 May. Our regular photometric surveillance started ... [more ▼]

We present a photometric detection of the first brightness dips of the unique variable star KIC 8462852 since the end of the Kepler space mission in 2013 May. Our regular photometric surveillance started in October 2015, and a sequence of dipping began in 2017 May continuing on through the end of 2017, when the star was no longer visible from Earth. We distinguish four main 1-2.5% dips, named "Elsie," "Celeste," "Skara Brae," and "Angkor", which persist on timescales from several days to weeks. Our main results so far are: (i) there are no apparent changes of the stellar spectrum or polarization during the dips; (ii) the multiband photometry of the dips shows differential reddening favoring non-grey extinction. Therefore, our data are inconsistent with dip models that invoke optically thick material, but rather they are in-line with predictions for an occulter consisting primarily of ordinary dust, where much of the material must be optically thin with a size scale <<1um, and may also be consistent with models invoking variations intrinsic to the stellar photosphere. Notably, our data do not place constraints on the color of the longer-term "secular" dimming, which may be caused by independent processes, or probe different regimes of a single process. [less ▲]

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See detailAfrique du Sud, les défis énergétiques et miniers d'un pays émergent
Merenne-Schoumaker, Bernadette ULiege

E-print/Working paper (2018)

Premier pays du continent africain par son développement économique, l’Afrique du Sud n’en est pas moins confrontée à plusieurs défis économiques parmi lesquels les secteurs de l’énergie et du minier ... [more ▼]

Premier pays du continent africain par son développement économique, l’Afrique du Sud n’en est pas moins confrontée à plusieurs défis économiques parmi lesquels les secteurs de l’énergie et du minier occupent une place de choix. En effet, le pays est fortement dépendant du charbon qui engendre différents problèmes économiques, sociaux et environnementaux. Le premier défi est de diversifier le mix énergétique et de réussir la transition énergétique nationale. Le second défi est économique et social : alors que le secteur minier joue un rôle majeur (2016 : 7,3 % du PIB national, plus de 455 000 emplois directs), il est en difficulté depuis trois ans. Sa relance est d’autant plus importante que le pays est menacé par la récession et que le taux de chômage progresse et dépasse actuellement 27 %. A travers l’analyse des défis énergétiques et miniers du pays, l’article tente non seulement de dresser un bilan des problèmes rencontrés par les deux secteurs mais encore de leurs potentialités et de pistes pour l’avenir. Le cas de l’Afrique du Sud est ainsi assez exemplaire des défis auxquels doit faire face un pays émergent, même si celui-ci est un BRICS. [less ▲]

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See detailAfgelopen decennium 21% meer Waalse leerlingen in het Vlaamse secundair onderwijs
Proesmans, Maxim ULiege

E-print/Working paper (2018)

Detailed reference viewed: 34 (5 ULiège)
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See detailAntoinette Desmoulins
Piront, Julie ULiege

E-print/Working paper (2018)

Detailed reference viewed: 19 (3 ULiège)
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See detailL’Histoire: un déterminant des comportements électoraux
Nossent, Jérôme ULiege

E-print/Working paper (2018)

Dans son « Étude électorale de certaines structure ou caractéristiques historiques », Marcel Hotterbeex propose une analyse des relations pouvant être établies entre les caractéristiques historiques ou ... [more ▼]

Dans son « Étude électorale de certaines structure ou caractéristiques historiques », Marcel Hotterbeex propose une analyse des relations pouvant être établies entre les caractéristiques historiques ou cultuelles de certaines communes belges et les résultats électoraux dans celles-ci. Cette étude s’inscrit dans une réflexion plus large concernant les résultats de partis régionaux et la conscience régionaliste des populations. [less ▲]

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See detail"L'enfance d'Ivan" d'Andrei Tarkovski: premier germe d'une dissidence?
Thirion, Nicolas ULiege

E-print/Working paper (2018)

Detailed reference viewed: 46 (16 ULiège)
See detailDecidability of the isomorphism and the factorization between minimal substitution subshifts
Durand, F.; Leroy, Julien ULiege

E-print/Working paper (2018)

Detailed reference viewed: 23 (2 ULiège)
See detailStein operators, kernels and discrepancies for multivariate continuous distributions
Mijoule, Guillaume; Reinert, Gesine; Swan, Yvik ULiege

E-print/Working paper (2018)

Detailed reference viewed: 22 (2 ULiège)
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See detailLa Couverture universelle en santé au Sahel : la situation au Mali et au Sénégal en 2018
Deville, Céline ULiege; Hane, Fatoumata; Ridde, Valéry et al

E-print/Working paper (2018)

Detailed reference viewed: 23 (1 ULiège)
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See detailDecreased integration of EEG source-space networks in disorders of consciousness
Rizkallah, Jennifer; Annen, Jitka ULiege; Modolo, Julien et al

E-print/Working paper (2018)

Detailed reference viewed: 23 (1 ULiège)
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See detailFarming Systems Analysis: A guidebook for researchers and development practitioners in Myanmar
Diepart, Jean-Christophe ULiege; Allaverdian, Céline

E-print/Working paper (2018)

This guidebook was written for students, researchers and development practitioners engaged in supporting family farmers in Myanmar and other areas of Southeast Asia. It provides detailed methodological ... [more ▼]

This guidebook was written for students, researchers and development practitioners engaged in supporting family farmers in Myanmar and other areas of Southeast Asia. It provides detailed methodological guidance to carry out farming systems analyses. The guidebook provides key concepts and tools for a better understanding of farmers’ decisions and practices. The guidebook helps nurture a professional dialogue between farmers and rural development practitioners, to effectively support family farmers’ productive activities and their future aspirations. The guidebook was developed by GRET in partnership with Yezin Agricultural University. It is based on 18 months of experience conducting farming systems research in five States and Regions of Myanmar. [less ▲]

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See detailImprovements to Inference Compilation for Probabilistic Programming in Large-Scale Scientific Simulators
Lezcano Casado, Mario; Gunes Baydin, Atilim; Martinez Rubio, David et al

E-print/Working paper (2017)

We consider the problem of Bayesian inference in the family of probabilistic models implicitly defined by stochastic generative models of data. In scientific fields ranging from population biology to ... [more ▼]

We consider the problem of Bayesian inference in the family of probabilistic models implicitly defined by stochastic generative models of data. In scientific fields ranging from population biology to cosmology, low-level mechanistic components are composed to create complex generative models. These models lead to intractable likelihoods and are typically non-differentiable, which poses challenges for traditional approaches to inference. We extend previous work in "inference compilation", which combines universal probabilistic programming and deep learning methods, to large-scale scientific simulators, and introduce a C++ based probabilistic programming library called CPProb. We successfully use CPProb to interface with SHERPA, a large code-base used in particle physics. Here we describe the technical innovations realized and planned for this library. [less ▲]

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See detailRecovery of unlawful tax advantages remains a thorny EU State aid law issue
Van Cleynenbreugel, Pieter ULiege

E-print/Working paper (2017)

A blogpost on State aid and tax rulings, as a contribution to the Regulating for Globalization blog

Detailed reference viewed: 26 (0 ULiège)
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See detailThe Excitements & Penniman Records
Sacré, Robert ULiege

E-print/Working paper (2017)

Interviews des membres des Excitements , de Koko Jean Davis et d'Enric Bosser ( Penniman Records) - Record reviews

Detailed reference viewed: 18 (1 ULiège)
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See detailLe chemin de Jacques STOTZEM
Sacré, Robert ULiege

E-print/Working paper (2017)

Interview de Jacques Stotzem au sujet de son 15è album "The Way To Go" ; toutes les compositions sont originales.

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See detailNeural Message Passing for Jet Physics
Henrion, Isaac; Brehmer, Johann; Bruna, Joan et al

E-print/Working paper (2017)

Detailed reference viewed: 16 (1 ULiège)
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See detailChina’s new relations with Panama and Costa Rica are another step towards a Beijing Consensus in Central America
Wintgens, Sophie ULiege

E-print/Working paper (2017)

Increased trade, aid, investment, and diplomatic engagement between China and both Costa Rica and Panama signal a more general projection of Chinese economic and political standards in international trade ... [more ▼]

Increased trade, aid, investment, and diplomatic engagement between China and both Costa Rica and Panama signal a more general projection of Chinese economic and political standards in international trade policy. [less ▲]

Detailed reference viewed: 74 (5 ULiège)
See detailVelléités d’indépendance, remise en question par les armes, guerres civiles : l’État semble de plus en plus contesté et menacé. Qu’en est-il vraiment ?
Wintgens, Sophie ULiege; Weerts, Audrey ULiege

E-print/Working paper (2017)

Dans un grand nombre d’études menées depuis plus d’une vingtaine d’années, la question de la place et du contrôle de l’État est formulée en termes de « crise ». Comment l’État du XXIe siècle fait-il face ... [more ▼]

Dans un grand nombre d’études menées depuis plus d’une vingtaine d’années, la question de la place et du contrôle de l’État est formulée en termes de « crise ». Comment l’État du XXIe siècle fait-il face aux pressions internationales (terrorisme, mondialisation, flux migratoires) et aux menaces internes (référendums d’indépendance, guerres civiles, ingérence étrangère)? "L’État dans tous ses états", un ouvrage collectif (publié chez Peter Lang en Belgique) dirigé par deux chercheuses belges, Sophie Wintgens et Audrey Weerts, essaie de répondre aux questions soulevées par l’actualité par des réflexions théoriques et des études de cas. Sophie Wintgens est chargée de recherches du Fonds de la recherche scientifique (FRS-FNRS) au Centre d’étude de la vie politique (CEVIPOL) de l’Université libre de Bruxelles, maître de conférences au département de science politique de l’Université de Liège et chercheuse associée au Center for International Relations Studies (CEFIR). Audrey Weerts est assistante et chargée de recherches au sein de la Cellule d’appui politologique Afrique-Caraïbes et de l’unité d’étude des systèmes politiques belges à l’Université de Liège. Toutes les deux expliquent à Middle East Eye que loin d’être une entité statique et figée, l’État se développe et se transforme, et reste encore pour l’instant un acteur central du système international. [less ▲]

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See detailSiSTEM, a Model for the Simulation of Short-Term Electricity Markets
Mathieu, Sébastien; Petitet, Marie; Perrot, Marie et al

E-print/Working paper (2017)

The aim of this document is to present SiSTEM, a multi-level simulation model of European short-term electricity markets, covering day-ahead and intraday exchanges to balancing activations in real-time ... [more ▼]

The aim of this document is to present SiSTEM, a multi-level simulation model of European short-term electricity markets, covering day-ahead and intraday exchanges to balancing activations in real-time, and imbalance settlement. In this model, power companies interact by making offers, notifying their positions to the system operator and impacting the balance of the electric system. The system operator activates balancing energy to restore the balance of the system, using all balancing activation offers, including from balancing reserves. Imbalance settlement implies bidirectional transactions between the system operator and power companies depending on the direction of their imbalance. A simulation of the model is performed by sequentially considering each time step and simulating actors’ decisions. The objective of this model is to understand the problems behind decisions of the actors within the short-term electrical system operation, to provide insights on how these problems can be solved through market design and to see how the decisions are linked together to shape a coherent system. This paper presents different simulation cases of an illustrative system in order to portray main features of the model in a practical and effective manner. In particular, the results show the importance of considering steady-state constraints and notice delays of generation units when looking at short-term issues. Future works could use this model to provide quantitative assessments of short-term market designs. [less ▲]

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See detailThe Science Case for an Extended Spitzer Mission
Yee, Jennifer C.; Fazio, Giovanni G.; Benjamin, Robert et al

E-print/Working paper (2017)

Although the final observations of the Spitzer Warm Mission are currently scheduled for March 2019, it can continue operations through the end of the decade with no loss of photometric precision. As we ... [more ▼]

Although the final observations of the Spitzer Warm Mission are currently scheduled for March 2019, it can continue operations through the end of the decade with no loss of photometric precision. As we will show, there is a strong science case for extending the current Warm Mission to December 2020. Spitzer has already made major impacts in the fields of exoplanets (including microlensing events), characterizing near Earth objects, enhancing our knowledge of nearby stars and brown dwarfs, understanding the properties and structure of our Milky Way galaxy, and deep wide-field extragalactic surveys to study galaxy birth and evolution. By extending Spitzer through 2020, it can continue to make ground-breaking discoveries in those fields, and provide crucial support to the NASA flagship missions JWST and WFIRST, as well as the upcoming TESS mission, and it will complement ground-based observations by LSST and the new large telescopes of the next decade. This scientific program addresses NASA's Science Mission Directive's objectives in astrophysics, which include discovering how the universe works, exploring how it began and evolved, and searching for life on planets around other stars. [less ▲]

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See detailThe EP’s ‘European Standards’ Resolution in the wake of James Elliott Construction: carving ever more holes in Pandora’s Box?
Van Cleynenbreugel, Pieter ULiege; Demoulin, Iris ULiege

E-print/Working paper (2017)

This blogpost analyses a recent Parliamentary resolution against the background of the Court of Justice's James Elliott Construction judgment, dealing with the legal nature of harmonised technical ... [more ▼]

This blogpost analyses a recent Parliamentary resolution against the background of the Court of Justice's James Elliott Construction judgment, dealing with the legal nature of harmonised technical standards in EU free movement law. [less ▲]

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See detailContribution of the β-glucosidase BglC to the Onset of the Pathogenic Lifestyle of Streptomyces scabies
Jourdan, Samuel; Francis, Isolde M.; Deflandre, Benoit et al

E-print/Working paper (2017)

Common scab disease on root and tuber plants is caused by Streptomyces scabies and related species which use the cellulose synthase inhibitor thaxtomin A as main phytotoxin. Thaxtomin production is ... [more ▼]

Common scab disease on root and tuber plants is caused by Streptomyces scabies and related species which use the cellulose synthase inhibitor thaxtomin A as main phytotoxin. Thaxtomin production is primarily triggered by the import of cello-oligosaccharides. Once inside the cell, the fate of the cello-oligosaccharides is dichotomized into i) fueling glycolysis with glucose for the saprophytic lifestyle through the action of β-glucosidase(s) (BG), and ii) eliciting the pathogenic lifestyle by inhibiting the CebR-mediated transcriptional repression of thaxtomin biosynthetic genes. Here we investigated the role of scab57721 encoding a putative BG (BglC) in the onset of the pathogenicity of S. scabies. Enzymatic assays showed that BglC was able to release glucose from cellobiose, cellotriose and all other cello-oligosaccharides tested. Its inactivation resulted in a phenotype opposite to what was expected as we monitored reduced production of thaxtomin when the mutant was cultivated on media containing cello-oligosaccharides as unique carbon source. This unexpected phenotype could be attributed to the highly increased activity of alternative intracellular BGs, probably as a compensation of bglC inactivation, which then prevented cellobiose and cellotriose accumulation to reduce the activity of CebR. In contrast, when the bglC null mutant was cultivated on media devoid of cello-oligosaccharides it instead constitutively produced thaxtomin. This observed hypervirulent phenotype does not fit with the proposed model of the cello-oligosaccharide-mediated induction of thaxtomin production and suggests that the role of BglC in the route to the pathogenic lifestyle of S. scabies is more complex than currently presented. [less ▲]

Detailed reference viewed: 48 (10 ULiège)
See detail‘Once Upon A Time’ ou le contrôle de la narration
Claisse, Frédéric ULiege; Huppe, Justine ULiege

E-print/Working paper (2017)

Ce billet de blog analyse les liens entre "ELIPSIA", une série de court-métrages réalisée par Frédéric DARRAS entre 2012 et 2016, et le projet de recherche STORYFIC, consacré aux effets du storytelling ... [more ▼]

Ce billet de blog analyse les liens entre "ELIPSIA", une série de court-métrages réalisée par Frédéric DARRAS entre 2012 et 2016, et le projet de recherche STORYFIC, consacré aux effets du storytelling sur l'écriture de fiction contemporaine, et plus particulièrement aux pouvoirs de la fiction. Après avoir décrit les enjeux posés par la série, l'article développe une série de parallèles avec les préoccupations d'auteurs français contemporains (C. Delaume, C. de Toledo, P. Vasset, A. Damasio), qui nourrissent le même rapport ambivalent à la fiction: à la fois dénoncée pour son emprise sur nos existences et son caractère aliénant, mais aussi valorisée pour ses promesses de réappropriation et d'émancipation. [less ▲]

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See detailVers une Politique de la Ville en Wallonie : recommandation pour la mise en oeuvre d'une politique transversale et intégrée de dynamisation des quartiers urbains
Mercenier, Chloé ULiege; Ruelle, Christine ULiege; Bastin, Florine et al

E-print/Working paper (2017)

La note de recherche propose les principaux résultats de la recherche CPDT 2015-2016 sur la Politique de la Ville en Wallonie. Elle concerne, plus précisément, les constats et recommandations pour le ... [more ▼]

La note de recherche propose les principaux résultats de la recherche CPDT 2015-2016 sur la Politique de la Ville en Wallonie. Elle concerne, plus précisément, les constats et recommandations pour le développement des quartiers urbains selon trois grandes catégories de difficultés : le cadre de vie dégradé, le contexte social défavorable et le contexte économique défavorable. [less ▲]

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See detailThe EU-Latin American Strategic Partnership: state of play and ways forward
Santander, Sébastian ULiege; Müller, Gustavo; Defraigne, Jean-Christophe et al

E-print/Working paper (2017)

By looking at the current social, economic and political trends in Latin America and the Caribbean and at recent developments in the EU’s relation with the region, this study explores windows of ... [more ▼]

By looking at the current social, economic and political trends in Latin America and the Caribbean and at recent developments in the EU’s relation with the region, this study explores windows of opportunity for advancing the EU-Latin American strategic partnership. It is argued that, although asymmetries between Europe and Latin America might impact and diminish the bi-regional relationship, the EU is wellpositioned to play a more active role in Latin America by strengthening existing institutional links, such as the strategic bi-regional partnership between the EU and the Community of Latin American and Caribbean States (CELAC) and the Euro-Latin America Parliamentary Assembly (EuroLat). The study concludes with tailor-made recommendations in order to advance the EU’s engagement and cooperation with individual Latin American countries and with the region as a whole, both through traditional cooperative channels and through closer parliamentary links within the framework of EuroLat. [less ▲]

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See detailUne serve sur le trône de France. Trahison et imposture politique en jupon (dans la Chanson de Berte aus grans piés)
Henrard, Nadine ULiege

E-print/Working paper (2017)

La chanson de Berte aus grans piés raconte la trahison fomentée envers leur maîtresse par deux servantes et leur cousin. En exploitant une ressemblance physique entre les deux femmes, la vieille Margiste ... [more ▼]

La chanson de Berte aus grans piés raconte la trahison fomentée envers leur maîtresse par deux servantes et leur cousin. En exploitant une ressemblance physique entre les deux femmes, la vieille Margiste parvient à placer sur le trône de France sa fille Aliste et à chasser la Berte, fille du roi de Hongrie que le roi Pépin venait tout juste d'épouser. Au terme de plusieurs années de mauvaise gouvernance, Aliste sera démasquée, et Berte enfin réhabilitée. Après une rapide présentation de la chanson de geste (tradition manuscrite, analyse de l'œuvre), un commentaire s'attache au mécanisme de la trahison pour envisager, en se référant au droit de l'époque, le problème de l'usurpation d'identité et de l'imposture politique au féminin telles que les traite un poète épique du XIIIe siècle. [less ▲]

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See detailGreen Biotechnology in Belgium: The Ghent Innovation District.
Segers, Jean Pierre ULiege

E-print/Working paper (2017)

This contribution explores the long-standing evolution of the green biotechnology cluster in the bioRegion of Flanders (Belgium), in particular in the Ghent innovation district.

Detailed reference viewed: 97 (5 ULiège)
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See detailDevelopment of an HPTLC method for determination of hypoglycin A in aqueous extracts of seedlings and samaras of Acer species.
Habyarimana, Jean Belt Adélite ULiege; Baise, Etienne; Douny, Caroline ULiege et al

E-print/Working paper (2017)

Hypoglycin A (HGA) is a toxin contained in seeds of the sycamore maple tree (Acer pseudoplatanus). Ingestion of this amino acid causes equine atypical myopathy (AM) in Europe. Another variety, A. negundo ... [more ▼]

Hypoglycin A (HGA) is a toxin contained in seeds of the sycamore maple tree (Acer pseudoplatanus). Ingestion of this amino acid causes equine atypical myopathy (AM) in Europe. Another variety, A. negundo, is claimed to be present where AM cases were reported in the US. For unknown reasons, occurrence of this disease has increased. It is important to define environmental key factors that may influence toxicity of samaras from Acer species. In addition, the content of HGA in seedlings needs to be determined since AM outbreaks, during autumn period when the seeds fall but also during spring when seeds are germinating. The present study aims to validate a reliable method using high performance thin layer chromatography for determination and comparison of HGA in samaras and seedlings. The working range of the method was between 20 μg HGA to 408 μg HGA per ml water, corresponding to 12 - 244 mg/kg fresh weight or 40 - 816 mg/kg dry weight, taking into account of an arbitrary average dry matter content of 30%. Instrumental limit of detection and limit of quantification were of 10 µg HGA/ml and 20 µg HGA/ml water, respectively. Instrumental precision was 4% (RSD on 20 repeated measurements) while instrumental accuracy ranged between 86% and 121% of expected value. The HGA recovery of the analytical method estimated from spiked samaras and seedlings samples ranged between 63 and 103%. The method was applied to 9 samples of samaras from Acer pseudoplatanus, A. platanoides and A. campestre and 5 seedlings samples from A. pseudoplatanus. The results confirm detection of HGA in samaras from A. pseudoplatanus and the absence of detection in samaras of other tested species. They also suggest that detected levels of HGA are highly variable. This confirmed the suitability of the method for HGA detection in samaras or seedling. [less ▲]

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See detailRaman Hyperspectral Imaging: An essential tool in the pharmaceutical field
Sacre, Pierre-Yves ULiege; Netchacovitch, Lauranne ULiege; Dumont, Elodie ULiege et al

E-print/Working paper (2017)

Resulting from the combination of Raman spectroscopy and optical microscopy, Raman hyperspectral imaging has proven to be an indispensable tool in the pharmaceutical field. This article will broach a ... [more ▼]

Resulting from the combination of Raman spectroscopy and optical microscopy, Raman hyperspectral imaging has proven to be an indispensable tool in the pharmaceutical field. This article will broach a number of Raman hyperspectral imaging applications that were developed in our laboratory, in order to demonstrate the significance of the technique. [less ▲]

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See detailL'Open Access en Belgique francophone : bientôt une réalité ?
Desseilles, François ULiege; Thys, Laurence ULiege

E-print/Working paper (2017)

Detailed reference viewed: 134 (24 ULiège)
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See detailClap 48- Le 48è NO Jazz & Heritage Festival 2017 - Le festival de la démesure
Sacré, Robert ULiege

E-print/Working paper (2017)

Compte rendu du 48è Festival de la Nouvelle Orleans

Detailed reference viewed: 14 (1 ULiège)