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See detailLa critique dans les revues d’architecture à Liège dans le contexte de l’activité éditoriale belge de l’Entre-deux-guerres.
Charlier, Sébastien ULg

Scientific conference (2017, May 18)

Loin de présenter un visage uniforme, la critique s’exprimant dans les revues d’architecture de l’entre-deux-guerres répond à des enjeux multiples et repose sur diverses postures qui peuvent être ... [more ▼]

Loin de présenter un visage uniforme, la critique s’exprimant dans les revues d’architecture de l’entre-deux-guerres répond à des enjeux multiples et repose sur diverses postures qui peuvent être publicitaires, doctrinaires ou corporatistes. Sur base de cette classification, cette communication propose d’analyser La Technique des travaux (1925-1940), L’Équerre (1928-1939) et Le Rez-de-chaussée (1928), trois revues dont la naissance est située à Liège, ville belge de seconde importance. En les caractérisant à la lumière d’organes similaires à portée nationale, elle entend montrer la diversité des profils de ceux qui se sont engagés dans la critique architecturale. Car tous les critiques ne sont pas architectes, loin de là. [less ▲]

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See detailCybercriminaliteit: materieel- en procedureelrechtelijke aspecten
Franssen, Vanessa ULg

Conference given outside the academic context (2017)

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See detailAharonov-Bohm oscillations of bosonic matter-wave beams in the presence of disorder and interaction
Chrétien, Renaud ULg; Dujardin, Julien; Petitjean, Cyril ULg et al

Poster (2017, May 17)

We study the one-dimensional (1D) transport properties of an ultracold gas of Bose-Einstein condensed atoms through Aharonov-Bohm (AB) rings. Our system consists of a Bose-Einstein condensate (BEC) that ... [more ▼]

We study the one-dimensional (1D) transport properties of an ultracold gas of Bose-Einstein condensed atoms through Aharonov-Bohm (AB) rings. Our system consists of a Bose-Einstein condensate (BEC) that is outcoupled from a magnetic trap into a 1D waveguide which is made of two semi-infinite leads that join a ring geometry exposed to a synthetic magnetic flux φ. We specifically investigate the effects both of a disorder potential and of a small atom-atom contact interaction strength on the AB oscillations. The main numerical tools that we use for this purpose are a mean-field Gross-Pitaevskii (GP) description and the truncated Wigner (tW) method. We find that a correlated disorder suppress the AB oscillations leaving thereby place to weaker amplitude, half period oscillations on transmission, namely the Aronov-Al’tshuler-Spivak (AAS) oscillations. The competition between disorder and interaction leads to a flip of the transmission at the AB flux φ = π. This flip could be a possible preliminary signature of an inversion of the coherent backscattering (CBS) peak. Our study paves the way to an analytical description of the inversion of that peak. [less ▲]

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See detailOrganiser et animer des séances de cas pratiques en droit
Biquet, Christine ULg

Learning material (2017)

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See detailPreferred Orientation Contribution to the Anisotropic Normal State Resistivity in Superconducting Melt-Cast Processed Bi2Sr2CaCu2O8+δ
Dellicour, Aline ULg; Vertruyen, Bénédicte ULg; Rikel, M O et al

in Materials (2017), 10

We describe how the contribution of crystallographic texture to the anisotropy of the resistivity of polycrystalline samples can be estimated by averaging over crystallographic orientations through a ... [more ▼]

We describe how the contribution of crystallographic texture to the anisotropy of the resistivity of polycrystalline samples can be estimated by averaging over crystallographic orientations through a geometric mean approach. The calculation takes into account the orientation distribution refined from neutron diffraction data and literature values for the single crystal resistivity tensor. The example discussed here is a melt-cast processed Bi2Sr2CaCu2O8+ (Bi-2212) polycrystalline tube in which the main texture component is a <010> fiber texture with relatively low texture strength. Experimentally-measured resistivities along the longitudinal, radial, and tangential directions of the Bi-2212 tube were compared to calculated values and found to be of the same order of magnitude. Calculations for this example and additional simulations for various texture strengths and single crystal resistivity anisotropies confirm that in the case of highly anisotropic phases such as Bi-2212, even low texture strengths have a significant effect on the anisotropy of the resistivity in polycrystalline samples. [less ▲]

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See detailUne mosaïque de géants
Beckers, Albert ULg

Scientific conference (2017, May 11)

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See detailLa montée d'une agriculture urbaine en Belgique: nourrir les populations en investissant deux grandes villes: Bruxelles-Capitale et Liège
Bousbaine, Antonia ULg; bryant, christopher; Jonet, christian

Conference (2017, May 11)

The loss of farms is problematic in Belgium, particularly in Wallonia (68% loss between 1980 and 2015) and in the Brussels-Capital Region and access to land is a real challenge for farmers to deal when ... [more ▼]

The loss of farms is problematic in Belgium, particularly in Wallonia (68% loss between 1980 and 2015) and in the Brussels-Capital Region and access to land is a real challenge for farmers to deal when setting up their farms. Recently, however, there has been a real increase in awareness of the importance of agricultural activity and land on the part of public authorities and especially of citizens who are trying to regain control of their food. These citizens are looking for a healthier and safer food in the face of the shortage of agricultural land in a densely populated country. The smallest interstices of the cities are occupied to set up innovative agricultural projects such as in Brussels and Liège where vegetable gardens and a Food Land Belt is developing to feed the populations of the cities. These agri-urban projects are the work of the citizens themselves, who take the initiative themselves to realize these innovative actions by pooling their knowledge and tools centered on new agricultural production models. We highlight the actions taken by certain segments of the population in the cities of Brussels and Liège where food, social and environmental issues have become a concern for consumers who invest in the green spaces left vacant compared to what is being done in other countries such as Canada or France, for more than a decade. [less ▲]

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See detailMolecular insights into cassava brown streak virus susceptibility and resistance by profiling of the early host response.
Anjanappa, Ravi B.; Mehta, Devang; Okoniewski, Michal J. et al

in Molecular Plant Pathology (2017)

Cassava brown streak viruses (CBSVs) are responsible for significant cassava yield losses in eastern sub-Saharan Africa. To study the possible mechanisms of plant resistance to CBSVs we inoculated CBSV ... [more ▼]

Cassava brown streak viruses (CBSVs) are responsible for significant cassava yield losses in eastern sub-Saharan Africa. To study the possible mechanisms of plant resistance to CBSVs we inoculated CBSV-susceptible and -resistant cassava varieties with a mixed infection of CBSVs using top-cleft grafting. Transcriptome profiling of the two cassava varieties was performed at the earliest time-point of full infection (28 days after grafting) in the susceptible scions. The expression of genes encoding proteins in RNA silencing, salicylic acid pathways and callose deposition was altered in the susceptible cassava variety but transcriptional changes were limited in the resistant variety. In total, the expression of 585 genes was altered in the resistant variety as compared to 1292 in the susceptible variety. Transcriptional changes led to activation of beta-1,3-glucanase enzymatic activity and reduction of callose deposition in the susceptible cassava variety. Time course analysis also showed that CBSV replication in susceptible cassava induced a strong up-regulation of RDR1, a gene previously reported to be a susceptibility factor in other potyvirus-host pathosystems. The differences in transcriptional responses to CBSV infection indicated that susceptibility involves restriction of callose deposition at plasmodesmata. Aniline blue staining of callose deposits also indicated that the resistant variety displays a moderate but significant increase in callose deposition at the plasmodesmata. Transcriptome data suggests that resistance does not involve typical anti-viral defence responses (i.e. RNA silencing and salicylic acid). A meta-analysis of the current RNA-seq dataset and selected potyvirus-host and virus-cassava RNA-seq datasets revealed that the conservation of the host response across pathosystems is restricted to genes involved in developmental processes. This article is protected by copyright. All rights reserved. [less ▲]

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See detailComprehensive Ion Mobility Calibration Strategies based on Synthetic Polymers
Haler, Jean ULg; Kune, Christopher ULg; Chirot, Fabien et al

Conference (2017, May 09)

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See detail"Sulla scia di Agnolo Bronzino, Alessandro Allori sodale di Benedetto Varchi. Un ritratto ‘misconosciuto’ del letterato e un suo sonetto inedito"
Geremicca, Antonio ULg

in LaRivista. Études culturelles italiennes Sorbonne Universités (2017), 5

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See detailExophtalmie dysthyroïdienne : intérêt de l'abord coronal
XHAUFLAIRE, Gaël ULg

Conference (2017, May 08)

Bien qu’aucun consensus strict ne soit défini, la tendance actuelle en chirurgie de l'exophtalmie dysthyroidienne, comme dans toute chirurgie, est à la petite incision. Il est toutefois utile de rappeler ... [more ▼]

Bien qu’aucun consensus strict ne soit défini, la tendance actuelle en chirurgie de l'exophtalmie dysthyroidienne, comme dans toute chirurgie, est à la petite incision. Il est toutefois utile de rappeler l’intérêt de l’abord coronal dans le traitement périorbitaire global de l’orbitopathie dysthyroïdienne. L'abord coronal permet un effondrement complet et efficace de 3 à 4 parois bilatérales. Il peut être associé à une lipectomie, à des greffes osseuses, voire à une reconstruction crânio-faciale plus complète, en un seul temps opératoire. L'effondrement de la paroi externe de l'orbite peut être réalisée sans pression sur le globe, et donc à moindre risque pour un oeil fragilisé par une myopie forte ou des chirurgies antérieures. La chirurgie ethmoïdale centrifuge expose à moins de risques de grasping musculaire qu'une chirurgie endonasale. La chirurgie s'effectuant du haut vers le bas expose à moins de risques de pénétration méningée et de fuite de LCR. La décompression "balancée", avec conservation du plancher médian et du ROOT expose à moins de risque de diplopie incoercible et à un moindre risque d'anesthésie trigéminée définitive. En présence d'une exophtalmie forte et d'un orbite congestif, fibreux, cicatriciel, d'un globe fragile, voire d'une sinusopathie, l'abord coronal sera parfois le seul possible. [less ▲]

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See detailFirst retrievals of methane isotopologues from FTIR ground-based observations in the High Arctic
Bader, Whitney ULg; Strong, Kimberley; Walker, Kaley et al

Conference (2017, May 08)

Atmospheric methane concentrations have reached a new high at 1845 ± 2 ppb, accounting for an increase of 256 % since pre-industrial times (WMO, 2016). In the last ten years, methane has been on the rise ... [more ▼]

Atmospheric methane concentrations have reached a new high at 1845 ± 2 ppb, accounting for an increase of 256 % since pre-industrial times (WMO, 2016). In the last ten years, methane has been on the rise again at rates of ~0.3%/year (e.g., Bader et al., 2016), after a period of stabilization of about 5 years. This recent increase is not fully understood due to remaining uncertainties in the methane budget, influenced by numerous anthropogenic and natural emission sources. In order to examine the cause(s) of this increase, we focus on the two main methane isotopologues, i.e. CH3D and 13CH4. Both isotopologues are emitted in the atmosphere with a different ratio depending on the emission processes involved. As heavier isotopologues will react more slowly than 12CH4, each isotopologue will be depleted from the atmosphere at a specific rate depending on the removal process. Methane isotopologues are therefore good tracers of the methane budget. In this contribution, the first development and optimization of the retrieval strategy of CH3D as well as the preliminary tests for 13CH4 will be presented and discussed, using FTIR (Fourier Transform infrared) solar spectra collected at the Polar Environment Atmospheric Research Laboratory, located at Eureka, Nunavut (80.05 °N, -86.42 °E, 610 m a.s.l.). Mixing ratio vertical profiles from a Whole Atmosphere Community Climate Model (WACCM v.4, Marsh et al., 2013) simulation developed by Buzan et al. (2016) are used as a priori inputs. The uncertainties affecting the retrieved columns, as well as an evaluation of the information content, will be discussed in order to assess the best strategy to be employed based on the altitude sensitivity range and complete error budget. [less ▲]

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See detailCow milk coagulation: process description, variation factors and evaluation methodologies. A review.
Troch, Thibault; Lefebure, Emilie ULg; Baeten, Vincent et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment (2017), 21

Introduction. For dairy producers who want to transform their milk, the ability of milk to coagulate is an important parameter. It makes it possible to transform milk into cheese. Therefore, it is ... [more ▼]

Introduction. For dairy producers who want to transform their milk, the ability of milk to coagulate is an important parameter. It makes it possible to transform milk into cheese. Therefore, it is necessary to understand the coagulation process and the techniques to measure it in order to achieve the best transformation performance. The objective of this review is to describe the milk coagulation process, the factors influencing it and the methods for measuring the coagulation of milk at lab level. Literature. The processing of milk into cheese involves three steps: coagulation, dewatering and refining. Coagulation is a key step which involves the use of rennet and depends on several parameters (pH, calcium content, temperature, etc.). Some milks never coagulate. To measure the coagulation ability of milk and identify different parameters in milk coagulation properties, the Formagraph, the computerized renneting meter and the Optigraph have been developed (reference methods). Equations have been developed using infrared spectrometry to predict the parameters obtained by the reference methods. Conclusions. The milk coagulation mechanism is known. However, the issue of non-coagulating milk persists and represents a real challenge in terms of yield. The use of infrared is a faster alternative to reference methods that measure the coagulation properties of milk, but still requires an improvement in prediction equations. [less ▲]

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See detailFrom the shortest to the tallest
Beckers, Albert ULg

in Annales d'Endocrinologie (2017), 78

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See detailDie Geheimnisse der Natur
Haler, Jean ULg; Schülke, Sophia; De Pauw, Edwin ULg

Article for general public (2017)

Detailed reference viewed: 30 (3 ULg)