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See detailEnergy: the clash of nations
Ernst, Damien ULg

Speech/Talk (2017)

Le monde de l'énergie est en guerre. C'est une guerre qui est menée sur de nombreux fronts, du Texas à l'Arabie saoudite, des salons feutrés de l'ONU et de l'organisation mondiale du commerce aux conseils ... [more ▼]

Le monde de l'énergie est en guerre. C'est une guerre qui est menée sur de nombreux fronts, du Texas à l'Arabie saoudite, des salons feutrés de l'ONU et de l'organisation mondiale du commerce aux conseils d'administration des majors du pétrole, des laboratoires chinois en panneaux photovoltaïques aux champs éoliens de la mer du Nord. Dans ce tumulte guerrier, chaque nation essaie de défendre ses propres intérêts, d'avancer ses pions de la manière la plus intelligente possible, sachant très bien qu'une énergie abondante et bon marché est une des clés d'une économie puissante. Au cours de ce cours-conférence, le Prof. Ernst décodera cette guerre qui est en train de se passer sous nos yeux et que souvent, l'on ne comprend pas. Il expliquera à quel point la technologie pourrait changer la géopolitique de l'énergie et plonger certaines nations dans la tourmente. Il mettra aussi en garde contre tout espoir excessif en la technologie pour garantir un approvisionnement en énergie suffisant, tellement la soif d'énergie de nos sociétés est grande. Il discutera également des politiques énergétiques à mettre en place en Europe pour éviter que le vieux continent ne sorte perdant de cette nouvelle guerre des ressources. [less ▲]

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See detailMacro-nutrient concentrations in Antarctic pack ice: Overall patterns and overlooked processes
Fripiat, François ULg; Meiners, K.M.; Vancoppenolle, M. et al

in Elementa: Science of the Anthropocene (2017), 5(13),

Antarctic pack ice is inhabited by a diverse and active microbial community reliant on nutrients for growth. Seeking patterns and overlooked processes, we performed a large-scale compilation of macro ... [more ▼]

Antarctic pack ice is inhabited by a diverse and active microbial community reliant on nutrients for growth. Seeking patterns and overlooked processes, we performed a large-scale compilation of macro-nutrient data (hereafter termed nutrients) in Antarctic pack ice (306 ice-cores collected from 19 research cruises). Dissolved inorganic nitrogen and silicic acid concentrations change with time, as expected from a seasonally productive ecosystem. In winter, salinity-normalized nitrate and silicic acid concentrations (C*) in sea ice are close to seawater concentrations (Cw), indicating little or no biological activity. In spring, nitrate and silicic acid concentrations become partially depleted with respect to seawater (C* < Cw), commensurate with the seasonal build-up of ice microalgae promoted by increased insolation. Stronger and earlier nitrate than silicic acid consumption suggests that a significant fraction of the primary productivity in sea ice is sustained by flagellates. By both consuming and producing ammonium and nitrite, the microbial community maintains these nutrients at relatively low concentrations in spring. With the decrease in insolation beginning in late summer, dissolved inorganic nitrogen and silicic acid concentrations increase, indicating imbalance between their production (increasing or unchanged) and consumption (decreasing) in sea ice. Unlike the depleted concentrations of both nitrate and silicic acid from spring to summer, phosphate accumulates in sea ice (C* > Cw). The phosphate excess could be explained by a greater allocation to phosphorus-rich biomolecules during ice algal blooms coupled with convective loss of excess dissolved nitrogen, preferential remineralization of phosphorus, and/or phosphate adsorption onto metal-organic complexes. Ammonium also appears to be efficiently adsorbed onto organic matter, with likely consequences to nitrogen mobility and availability. This dataset supports the view that the sea ice microbial community is highly efficient at processing nutrients but with a dynamic quite different from that in oceanic surface waters calling for focused future investigations. [less ▲]

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See detailPaolo Orsi et la recherche archéologique en Italie méridionale
Cuvelier, Graham ULg

Scientific conference (2017, March 28)

Paolo Orsi fait partie des pionniers de l'archéologie moderne en Italie méridionale, particulièrement en Calabre et en Sicile. Cet exposé retrace les grandes étapes de sa carrière, son œuvre et son rôle ... [more ▼]

Paolo Orsi fait partie des pionniers de l'archéologie moderne en Italie méridionale, particulièrement en Calabre et en Sicile. Cet exposé retrace les grandes étapes de sa carrière, son œuvre et son rôle dans le développement de la recherche archéologique dans des zones alors méconnues mais pourtant riches d'un patrimoine culturel de premier ordre. [less ▲]

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See detailBlood Biomarkers in Idiopathic Pulmonary Fibrosis.
GUIOT, Julien ULg; Moermans, Catherine; Henket, Monique et al

in Lung (2017)

PURPOSE: Idiopathic pulmonary fibrosis (IPF) is a progressive and lethal lung disease of unknown origin whose incidence has been increasing over the latest decade partly as a consequence of population ... [more ▼]

PURPOSE: Idiopathic pulmonary fibrosis (IPF) is a progressive and lethal lung disease of unknown origin whose incidence has been increasing over the latest decade partly as a consequence of population ageing. New anti-fibrotic therapy including pirfenidone and nintedanib have now proven efficacy in slowing down the disease. Nevertheless, diagnosis and follow-up of IPF remain challenging. METHODS: This review examines the recent literature on potentially useful blood molecular and cellular biomarkers in IPF. Most of the proposed biomarkers belong to chemokines (IL-8, CCL18), proteases (MMP-1 and MMP-7), and growth factors (IGBPs) families. Circulating T cells and fibrocytes have also gained recent interest in that respect. Up to now, though several interesting candidates are profiling there has not been a single biomarker, which proved to be specific of the disease and predictive of the evolution (decline of pulmonary function test values, risk of acute exacerbation or mortality). CONCLUSION: Large scale multicentric studies are eagerly needed to confirm the utility of these biomarkers. [less ▲]

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See detailBenchmarking carbon fluxes of the ISIMIP2a biome models
Chang, Jinfeng; Ciais, Philippe; Wang, Xuhui et al

in Environmental Research Letters (2017), 12

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See detailVoice dosimetry in music theory teachers
Schiller, Isabel ULg; Morsomme, Dominique ULg; Sfez, Lou et al

Conference (2017, March 28)

BACKGROUND: In Belgium, music theory teachers teach theoretical aspects of rhythm, singing and other music-related skills (such as pitch accuracy or singing in harmony) outside the regular school setting ... [more ▼]

BACKGROUND: In Belgium, music theory teachers teach theoretical aspects of rhythm, singing and other music-related skills (such as pitch accuracy or singing in harmony) outside the regular school setting. To date, their voice use and how it may be affected by background noise have hardly been studied. OBJECTIVES: 1) to determine the relationship between music theory teachers’ vocal loading and background noise and 2) to examine if the daily number of vocal fold vibration cycles (vocal loading index, VLI) is reflected in the teachers’ auto-evaluation of their voice. METHODS: A VoxLog voice dosimeter (Sonvox) was used to monitor 13 music theory teachers for one 6-day workweek from the early morning until late evening. Parameters analysed were fundamental frequency (F0, Hz), voice sound pressure level (SPL, dB), time dose (%), noise SPL (dB), and VLI. At the end of each monitoring day, subjects evaluated their voice quality, vocal fatigue, and amount of speaking and singing voice used by means of a visual analogue scale. RESULTS: Statistical analysis revealed positive correlations between noise SPL and F0, voice SPL and time dose. Correlations were also found between VLI and auto-evaluation data: a rise in VLI accompanied a decrease in self-perceived voice quality, an increase in vocal fatigue and an increase in the perceived amount of singing and speaking voice used. CONCLUSION: Three conclusions were drawn from the results. Firstly, vocal loading measured in music theory teachers is connected to the background noise level. Secondly, a great number of vibration cycles is associated with a self-reported increase in vocal fatigue and a lower general voice quality at the end of the day. Finally, correlations between the number of vibration cycles and the self-reported amount of voice use suggest that visual analogue scales are a reliable method to evaluate daily voice use. [less ▲]

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See detailResearch in Prison from the inside. An uncomfortable position for the "Official-Researcher"?
Sevenants, Yves ULg

Conference (2017, March 28)

Presentation about the experience of a native researcher in prison.

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See detailLes avant-gardes du cinéma au lendemain de la Première Guerre mondiale
Tomasovic, Dick ULg

Scientific conference (2017, March 28)

Panorama historique des différentes avant-gardes cinématographiques françaises et allemandes au lendemain de la Première guerre mondiale.

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See detailOn-sky performance of the QACITS pointing control technique with the Keck/NIRC2 vortex coronagraph
Huby, Elsa ULg; Bottom, Michael; Femenia, Bruno et al

in Astronomy and Astrophysics (2017), 600

A vortex coronagraph is now available for high contrast observations with the Keck/NIRC2 instrument at L band. Reaching the optimal performance of the coronagraph requires fine control of the wavefront ... [more ▼]

A vortex coronagraph is now available for high contrast observations with the Keck/NIRC2 instrument at L band. Reaching the optimal performance of the coronagraph requires fine control of the wavefront incident on the phase mask. In particular, centering errors can lead to significant stellar light leakage that degrades the contrast performance and prevents the observation of faint planetary companions around the observed stars. It is thus critical to correct for the possible slow drift of the star image from the phase mask center, generally due to mechanical flexures induced by temperature and/or gravity field variation, or to misalignment between the optics that rotate in pupil tracking mode. A control loop based on the QACITS algorithm for the vortex coronagraph has thus been developed and deployed for the Keck/NIRC2 instrument. This algorithm executes the entire observing sequence, including the calibration steps, initial centering of the star on the vortex center and stabilisation during the acquisition of science frames. On-sky data show that the QACITS control loop stabilizes the position of the star image down to 2.4 mas rms at a frequency of about 0.02 Hz. However, the accuracy of the estimator is probably limited by a systematic error due to a misalignment of the Lyot stop with respect to the entrance pupil, estimated to be on the order of 4.5 mas. A method to reduce the amplitude of this bias down to 1 mas is proposed. The QACITS control loop has been successfully implemented and provides a robust method to center and stabilize the star image on the vortex mask. In addition, QACITS ensures a repeatable pointing quality and significantly improves the observing efficiency compared to manual operations. It is now routinely used for vortex coronagraph observations at Keck/NIRC2, providing contrast and angular resolution capabilities suited for exoplanet and disk imaging. [less ▲]

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See detailThe Borders of Nord-Pas-de-Calais: Camps, Actors and Insecurity
Da Silva, Amanda Carolina ULg

E-print/Working paper (2017)

I explore the securitization of the immigration process developed between France and the UK as units of the EU regional security complex. My main intention was to not only identify how both countries ... [more ▼]

I explore the securitization of the immigration process developed between France and the UK as units of the EU regional security complex. My main intention was to not only identify how both countries securitized immigration together, but also to identify the social consequences its produces for the city of Calais. The FR-UK immigration policy has been implemented in the city of Calais since 2002, and over time security apparatus has become more sophisticated, which sums up the transposition of the UK border and construction of refugee camps and jungles. As a result of this process, it was possible to identify the appearance of self-established camps, emergence of new actors, and rise of nationalism. I aim to highlight the relevance of bilateral policies developed between both countries and its impacts in Calais. From this, policies’ and migrants’ representations of emerging camps, new actors and nationalism will produce considerable changes in the city. [less ▲]

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See detailL'interdiction du port du voile au travail
Kéfer, Fabienne ULg

Scientific conference (2017, March 28)

Séminaire faisant suite aux arrêts de la CJUE du 17 mars 2017 (C.J.U.E., 14 mars 2017, G4S Secure Solutions, C-157/15 ; C.J.U.E., 14 mars 2017, Micropole Univers, C-188/15)

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See detailGovernance of plant health and management of crop diversity - the case of common bean health management among members of the association Croqueurs de Carottes
Klaedtke, Stephanie ULg

Doctoral thesis (2017)

All over the globe, networks of seed growers are cultivating crop diversity in fields and gardens. Their contribution to the maintenance of this diversity has been studied, but research has widely left ... [more ▼]

All over the globe, networks of seed growers are cultivating crop diversity in fields and gardens. Their contribution to the maintenance of this diversity has been studied, but research has widely left aside their management of plant health. The governance of bean health practiced by an association of artisanal seed companies, Croqueurs de Carottes, is approached as a case study in the objective of specifying how management of crop diversity and governance of plant health are articulated. Their concern for the governance of bean health is elucidated from an agroecological perspective, taking an interdisciplinary and transformative approach. Actor-network theory constitutes the backbone of the thesis, situated between agronomy and sociology and drawing upon a threefold research device: on-farm experiments, semi-directive interviews and participant observation. The Croqueurs' approach to bean health is described as in situ approach, in which plant populations are considered healthy if they are able to live with potential plant pathogens and adapt to their growing environments. Relying on ecological interactions, competences of plant health management are distributed throughout the production system. Both for plant health and crop diversity management, a seed lot is determined by a complex system of interactions. A clear boundary distinguishing plant populations from their growing environment cannot be drawn. This implies (i) that plant health must be judged upon in situ in the plants' growing environment and (ii) that the governance of plant health must be considered at the collective scale. [less ▲]

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See detailQuelle place pour l'usager dans la stratégie globale de l'entreprise ?
Elsen, Catherine ULg

Conference given outside the academic context (2017)

L'intervention aborde les différentes approches centrées usagers possibles et leur mise en oeuvre en contexte entrepreneurial. La présentation fait particulièrement état de la posture et méthodologie du ... [more ▼]

L'intervention aborde les différentes approches centrées usagers possibles et leur mise en oeuvre en contexte entrepreneurial. La présentation fait particulièrement état de la posture et méthodologie du Design Thinking et en présente les principaux aspects. [less ▲]

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See detail"À propos d'une tentative de réparation symbolique envers les morts, à l'usage des vivants." Retour sur Rwanda. À travers nous l'humanité
Jousten, Lison ULg

Scientific conference (2017, March 27)

L’intervention revient sur Rwanda. À travers nous l’humanité (2006), un documentaire de Marie-France Collard inscrit dans le prolongement du spectacle Rwanda 94 (2000), auquel elle avait collaboré en tant ... [more ▼]

L’intervention revient sur Rwanda. À travers nous l’humanité (2006), un documentaire de Marie-France Collard inscrit dans le prolongement du spectacle Rwanda 94 (2000), auquel elle avait collaboré en tant qu’auteur et vidéaste. Son documentaire s’intéresse à la réception du spectacle par le public rwandais et dépeint un pays en crise, dix ans après le génocide. Entre Rwanda 94 et Rwanda. À travers nous l’humanité s’opère une série de glissements, de prolongements et d’empreintes. [less ▲]

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See detailFrom Loose to Boxed Fragments and Back Again. Seriality and Archive in Chris Ware's ‘Building Stories’
Crucifix, Benoît ULg

in Journal of Graphic Novels and Comics (2017)

This article focuses on the dynamics of seriality, archive and collection in Chris Ware's graphic novel “Building Stories”. It argues that the dispersed serialization of “Building Stories” is key to ... [more ▼]

This article focuses on the dynamics of seriality, archive and collection in Chris Ware's graphic novel “Building Stories”. It argues that the dispersed serialization of “Building Stories” is key to understand its box-of- comics format as well as its fragmented narrative structure. In a self-reflexive homage to the material history of comics, Ware's graphic novel indeed appears as an archive of its own serialization, foregrounding a process of collecting/dispersing fragments. [less ▲]

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