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See detailCardio-pulmonary mechanics and minimal modelling in critical care
de Bournonville, Sébastien; Pironet, Antoine ULg; Desaive, Thomas ULg et al

Poster (2016, March 04)

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See detailPolitique internationale de la culture: une introduction
Vlassis, Antonios ULg

Scientific conference (2016, March 04)

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See detailPolitique de la Ville - Dynamisation des coeurs de ville
Bianchet, Bruno ULg; Wilmotte, Pierre-François ULg

Conference given outside the academic context (2016)

Keynote about urban policies in Wallonia (Belgium). It was summary of our research 2014-2015 about evaluation and proposals for urban policies in Wallonia.

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See detailDroit constitutionnel belge - Dossier de documentation (année académique 2015-2016)
Behrendt, Christian ULg

Learning material (2016)

Le document constitue le Dossier de documentation, à lire par les étudiants en parallèle au cours ex cathedra, de l'enseignement de Droit constitutionnel dispensé à l'Université de Liège en bachelier en ... [more ▼]

Le document constitue le Dossier de documentation, à lire par les étudiants en parallèle au cours ex cathedra, de l'enseignement de Droit constitutionnel dispensé à l'Université de Liège en bachelier en droit et en science politique [less ▲]

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See detailMetamorphosing cultural patterns: Cassirer in the steps of Warburg on Culture Theory
Hagelstein, Maud ULg

Conference (2016, March 03)

My argument stems from a reading of the fifth study in Cassirer’s The Logic of the Cultural Sciences (1942), devoted to the “Tragedy of Culture.” I contend that this fifth study resolves an observable ... [more ▼]

My argument stems from a reading of the fifth study in Cassirer’s The Logic of the Cultural Sciences (1942), devoted to the “Tragedy of Culture.” I contend that this fifth study resolves an observable indecision in Cassirer’s position on cultural productions: to lead man toward greater happiness and freedom, should one strive to uphold traditional forms, or should one abandon old models and create new ones? I believe that Cassirer’s consideration of art historian Aby Warburg’s works (1866-1929) constitutes a defining moment in understanding his answer to that question. This fifth study illustrates the profound impact of Warburg’s model for understanding culture on Cassirer’s philosophy. Contrary to the claims of some exegetes, Cassirer and Warburg’s theoretical positions on the matter are very close. Cassirer’s treatment of the reception of artistic forms (he argues that form reception is never merely a passive act) follows, point by point, Warburg’s theory of the survival (Nachleben) of artistic motifs. [less ▲]

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See detailThe darkening of the Greenland ice sheet: trends, drivers, and projections (1981–2100)
Tedesco, M.; Doherty, S.; Fettweis, Xavier ULg et al

in Cryosphere (The) (2016), 10

The surface energy balance and meltwater production of the Greenland ice sheet (GrIS) are modulated by snow and ice albedo through the amount of absorbed solar radiation. Here we show, using space-borne ... [more ▼]

The surface energy balance and meltwater production of the Greenland ice sheet (GrIS) are modulated by snow and ice albedo through the amount of absorbed solar radiation. Here we show, using space-borne multispectral data collected during the 3 decades from 1981 to 2012, that summertime surface albedo over the GrIS decreased at a statistically significant (99 %) rate of 0.02 decade−1 between 1996 and 2012. Over the same period, albedo modelled by the Modèle Atmosphérique Régionale (MAR) also shows a decrease, though at a lower rate ( ∼ −0.01 decade−1) than that obtained from space-borne data. We suggest that the discrepancy between modelled and measured albedo trends can be explained by the absence in the model of processes associated with the presence of light-absorbing impurities. The negative trend in observed albedo is confined to the regions of the GrIS that undergo melting in summer, with the dry-snow zone showing no trend. The period 1981–1996 also showed no statistically significant trend over the whole GrIS. Analysis of MAR outputs indicates that the observed albedo decrease is attributable to the combined effects of increased near-surface air temperatures, which enhanced melt and promoted growth in snow grain size and the expansion of bare ice areas, and to trends in light-absorbing impurities (LAI) on the snow and ice surfaces. Neither aerosol models nor in situ and remote sensing observations indicate increasing trends in LAI in the atmosphere over Greenland. Similarly, an analysis of the number of fires and BC emissions from fires points to the absence of trends for such quantities. This suggests that the apparent increase of LAI in snow and ice might be related to the exposure of a "dark band" of dirty ice and to increased consolidation of LAI at the surface with melt, not to increased aerosol deposition. Albedo projections through to the end of the century under different warming scenarios consistently point to continued darkening, with albedo anomalies averaged over the whole ice sheet lower by 0.08 in 2100 than in 2000, driven solely by a warming climate. Future darkening is likely underestimated because of known underestimates in modelled melting (as seen in hindcasts) and because the model albedo scheme does not currently include the effects of LAI, which have a positive feedback on albedo decline through increased melting, grain growth, and darkening. [less ▲]

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See detailEvaluation de la stabilité d'une paroi rocheuse à Flémalle
Delvoie, Simon ULg; Collin, Frédéric ULg

Report (2016)

La caractérisation détaillée du massif rocheux a été réalisée à partir de mesures in situ et d'observations. Ces données sont ensuite utilisées dans l'analyse de stabilité du massif rocheux. Un traitement ... [more ▼]

La caractérisation détaillée du massif rocheux a été réalisée à partir de mesures in situ et d'observations. Ces données sont ensuite utilisées dans l'analyse de stabilité du massif rocheux. Un traitement adéquat de la paroi est finalement proposé afin de minimiser les projections de blocs rocheux sur d'éventuels bâtiments sur le moyen et le long terme. [less ▲]

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See detailA Readers’ History of Girls’ Comics: A Review of Remembered Reading
Crucifix, Benoît ULg

in The Comics Grid: Journal of Comics Scholarship (2016), 6

In her monograph Remembered Reading (2015), Mel Gibson builds on her field work, interviews and meetings with readers of girls’ comics to recover the history and memory of this forgotten genre. Drawing on ... [more ▼]

In her monograph Remembered Reading (2015), Mel Gibson builds on her field work, interviews and meetings with readers of girls’ comics to recover the history and memory of this forgotten genre. Drawing on these shared memories and recollections, Gibson presents a readers’ history of British girls’ comics that reveals how these readings were part of identity constructions and personal histories, tied up to public factors of gender, age and class. In doing so, Gibson revises many stereotypes that have characterized girls’ comics, sketches a much more nuanced picture of the genre, and highlights the complexity of readers’ engagement with comics. [less ▲]

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See detailRelative positioning with Galileo E5 AltBOC code measurements
Deprez, Cécile ULg

Conference (2016, March 03)

Depuis une dizaine d’années, l’Europe développe son propre système de positionnement par satellites (ou Global Navigation Satellites System (GNSS) en anglais), connu sous le nom de Galileo. À la pointe de ... [more ▼]

Depuis une dizaine d’années, l’Europe développe son propre système de positionnement par satellites (ou Global Navigation Satellites System (GNSS) en anglais), connu sous le nom de Galileo. À la pointe de la technologie, les horloges atomiques embarquées à bord de ses satellites ainsi que les signaux transmis par ces derniers sont extrêmement prometteurs dans beaucoup de domaines. Bien que toujours en phase de test à l’heure actuelle, ce système a déjà conduit à de premières mesures, notamment en matière de positionnement. Parmi ces nouvelles technologies, un signal en particulier semble très prometteur : Galileo E5, aussi appelé Galileo E5a+b ou encore Galileo E5 AltBOC. Ce signal permet d’effectuer des mesures de code et de phase plus précises. Il est également moins sensible au multi-trajet. Grâce à ses caractéristiques innovantes, Galileo E5 devrait permettre d’estimer des positions avec une précision supérieure à tous les autres signaux utilisés aujourd’hui. Une étude comparative des positions estimées avec les systèmes GPS (américain) et Galileo (européen) sur leurs différentes fréquences émises (GPS L1, GPS L2, GPS L5 pour GPS et Galileo E1, Galileo E5a, Galileo E5b et Galileo E5 AltBOC pour Galileo) a été menée dans ce mémoire. Pour ce faire, une combinaison d’observations appelée double différence (DD) est utilisée sous différentes configurations (ligne de base nulle (ZB), courte (SB) et moyenne (MB)) de récepteurs GNSS. Les récepteurs utilisés appartiennent à l’Université de Liège (2 récepteurs Trimble NetR9, 1 récepteur Septentrio XS et un récepteur Septentrio X4). Il ressort de cette étude que Galileo E5 AltBOC présente les observations les plus précises (en ZB, toutes sources d’erreurs éliminées). L’analyse démontre également qu’une précision de l’ordre de quelques décimètres sur la position à déterminer peut être atteinte avec les codes transmis par le signal Galileo E5, et ce jusqu’à 25 kilomètres de distance. [less ▲]

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See detailSalon de la géomatique F.I.G. 2016 - Saint-Dié
Donnay, Jean-Paul ULg

Conference (2016, March 03)

Le Festival International de la Géographique (FIG) est organisé depuis 1990 à Saint-Dié-des-Vosges. Il accueille chaque année quelque 50.000 visiteurs et rassemble tant les spécialistes internationaux et ... [more ▼]

Le Festival International de la Géographique (FIG) est organisé depuis 1990 à Saint-Dié-des-Vosges. Il accueille chaque année quelque 50.000 visiteurs et rassemble tant les spécialistes internationaux et que les simples amateurs de culture et d’animation. Conférences, débats, tables rondes, cafés géographiques, expositions, foire du livre, salon de la géomatique, films… tout dans la ville et durant 3 jours est consacré – gratuitement – à la présentation des dernières découvertes de la recherche scientifique en géographie. Chaque année, un pays invité est à l’honneur. En 2016, c’est la Belgique ; de sorte que les chercheurs, les enseignants et les entreprises publiques et privées belges sont spécialement invités à participer à cette manifestation. La présentation faite durant la journée BeGeo du 3 mars à Bruxelles aura pour but de présenter les conditions de participation et d’inviter les partenaires belges au Salon de la Géomatique organisé durant le Festival International de la Géographie du 30 septembre au 2 octobre 2016. [less ▲]

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See detailPresse et jeu vidéo
Dozo, Björn-Olav ULg; Krywicki, Boris ULg

Scientific conference (2016, March 03)

Cours sur la presse vidéoludique. Cinquième séance du cycle de conférences "Histoire et analyse des pratiques du jeu vidéo"

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Peer Reviewed
See detailSomatic mosaicism underlies X-linked acrogigantism (XLAG) syndrome in sporadic male subjects
Daly, Adrian ULg; Yuan, Bo; Fina, Frederic et al

in Endocrine-Related Cancer (2016)

Somatic mosaicism has been implicated as a causative mechanism in a number of genetic and genomic disorders. X-linked acrogigantism (XLAG) syndrome is a recently characterized genomic form of pediatric ... [more ▼]

Somatic mosaicism has been implicated as a causative mechanism in a number of genetic and genomic disorders. X-linked acrogigantism (XLAG) syndrome is a recently characterized genomic form of pediatric gigantism due to aggressive pituitary tumors that is caused by submicroscopic chromosome Xq26.3 duplications that include GPR101. We studied XLAG syndrome patients (N=18) to determine if somatic mosaicism contributed to the genomic pathophysiology. Eighteen subjects with XLAG syndrome were identified with Xq26.3 duplications using high definition array comparative genome hybridization (HD-aCGH). We noted males with XLAG had a decreased log2 ratio compared with expected values, suggesting potential mosaicism, while females showed no such decrease. As compared with familial male XLAG cases, sporadic males had more marked evidence for mosaicism, with levels of Xq26.3 duplication between 16.1-53.8%. These characteristics were replicated using a novel, personalized breakpoint-junction specific quantification droplet digital PCR (ddPCR) technique. Using a separate ddPCR technique we studied the feasibility of identifying XLAG syndrome cases in a distinct patient population of 64 unrelated subjects with acromegaly/gigantism and identified one female gigantism patient that had increased copy number variation (CNV) threshold for GPR101 that was subsequently diagnosed as having XLAG syndrome on HD-aCGH. Employing a combination of HD-aCGH and novel ddPCR approaches, we have demonstrated that XLAG syndrome can be caused by variable degrees of somatic mosaicism for duplications at chromosome Xq26.3. Somatic mosaicism was shown to occur in sporadic males but not in females with XLAG syndrome, although the clinical characteristics of the disease were similarly severe in both sexes. [less ▲]

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See detailReversal of Long-Term Trends in Ethane Identified from the Global Atmosphere Watch Reactive Gases Measurement Network
Helmig, Detlev; Buchmann, Brigitte; Carpenter, Lucy et al

Poster (2016, March 02)

Reactive gases play an important role in climate and air pollution issues. They control the self-cleansing capability of the troposphere, contribute to air pollution and acid deposition, regulate the ... [more ▼]

Reactive gases play an important role in climate and air pollution issues. They control the self-cleansing capability of the troposphere, contribute to air pollution and acid deposition, regulate the lifetimes and provide tracers for deciphering sources and sinks for greenhouse gases. Within GAW, the focus is placed on long-term, high-quality observations of ozone (O3), carbon monoxide (CO), volatile organic compounds (VOC), nitrogen oxides (NOx), and sulfur dioxide (SO2). More than 100 stations worldwide carry out reactive gases measurements with data reported to two World Data Centers. The reactive gases program in GAW cooperates The WMO GAW Reactive Gases Program with regional networks and other global monitoring initiatives in order to attain a complete picture of the tropospheric chemical composition. Observations are being made by in-situ monitoring, measurements from commercial routine air-crafts (e.g. IAGOS), column observations, and from flask sampling networks. Quality control and coordination of measurements between participating stations are a primary emphasis. GAW reactive gases data in rapid delivery mode are used to evaluate operational atmospheric composition forecasts in the EU Copernicus Atmospheric Monitoring Service. Oversight of the program is provided by GAW-WMO coordinated Reactive Gases Scientific Advisory Committee (RG-SAG). [less ▲]

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See detailFlexibility services in the electrical system - presentation
Mathieu, Sébastien ULg

Speech/Talk (2016)

This thesis assesses the impact of exchanging flexibility in the electrical system and analyzes the complex interactions that may result from these exchanges. The impacts on different parts of the ... [more ▼]

This thesis assesses the impact of exchanging flexibility in the electrical system and analyzes the complex interactions that may result from these exchanges. The impacts on different parts of the electrical system are presented: the day-ahead energy market, the secondary reserve and the distribution system. The modeling techniques used to carry the analysis are optimization, game theory and agent-based modeling. Since flexibility is the base block of this thesis, two methods to obtain flexibility from an actual consumption process are broached: direct control of a portfolio of heat pumps and dynamic pricing to control electric heaters and boilers. [less ▲]

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See detailParticipation au débat sur la schizophrénie à partir du film "The voices" de Marjane Satrapi
Englebert, Jérôme ULg

Conference given outside the academic context (2016)

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See detailÉcarts
Jousten, Lison ULg

Scientific conference (2016, March 02)

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See detailStratégies innovantes d’adaptation à la variabilité et au changement climatiques au Sahel : cas de l’irrigation de complément et de l’information climatique dans les exploitations agricoles du Burkina Faso
Zongo, Bétéo ULg

Doctoral thesis (2016)

The Sahelian farmers, the scientific community, government and development partners are actively looking for new farming practices to mitigate the consequences of dry spells probably exacerbated by ... [more ▼]

The Sahelian farmers, the scientific community, government and development partners are actively looking for new farming practices to mitigate the consequences of dry spells probably exacerbated by climate changes. To contribute for this challenge, this research examines the issue of agricultural innovations’ adoption in the Sahelian and Sudano-Sahelian zones of Burkina Faso. Among promoting agricultural innovation, the study explored the possibilities to popularize the practice of supplemental irrigation from individual basins (ICBI) and the use of climate information (CI) in the farms. The approach developed is threefold. Data were collected from farm households through surveys and conducting experimentation of ICBI and use of CI in rainfed agriculture. In addition to the usual descriptive statistics, analysis of variance, the multinomial logit model was used to analyze the determinants of the agricultural innovations dissemination. Determining factors of farmers’ willingness to adopt ICBI were identified using a logistic model. The criteria for partial budgeting were used as tools for assessing the economic viability of ICBI. The Heckman model associated with the contingent valuation approach was used to analyze famers’ willingness to use CI. Simulations were made from a bio-economic model to test some policy instruments for the adoption of these new practices. After four decades of diffusion (1974-2013), the adoption rate is estimated at 69.3% for stone bunds, 49.1% for zaï, 26.2% for grass strips and less than 10% for half-moons, bunds land and mulching. The low level of farmers’ organization and access to agricultural services were the major constraints to their adoption. Over 65% of the farmers believe that ICBI is an effective way to mitigate the adverse effects of dry spells on crop yields. After three years, the experiments showed that this innovation in family farms increases maize yield by 1.08T/ha (88.3%). Maize production surplus achieved with ICBI can fill the monthly cereal requirements of 17 people on average and increases the gross margin by F 178,483 CFA compared to the situation without irrigation. The review of the net present value, internal rate of return and the net benefits increase ratio showed that the profitability to practice supplemental irrigation depends on the types of basins. From the sampled farmers, 93% of them required CI to guide their decision in planning agricultural activities. About 64% of the farmers are willing to pay for CI. The experiments reveal that the surplus of maize and sorghum yield obtained with the use of CI meets the monthly cereal requirement of 7 persons on average compared to traditional seasonal forecasts. The simulations indicate that the ICBI in middle year increases the expected income of 26.5% (F 133 030 CFA) compared to the situation without irrigation. The tested policies include six types of grant and the establishment of a system for granting credit to farm households to finance the supplementary irrigation device. The implementation of these policies should facilitate the adoption of ICBI at a larger scale. The researchers and development actors should pursue the experimentation on the combination of ICBI and CI. [less ▲]

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See detailAnticoherence and entanglement of spin states
Martin, John ULg; Baguette, Dorian ULg; Damanet, François ULg et al

Scientific conference (2016, March 02)

We investigate multiqubit permutation-symmetric states with maxi- mally mixed reduced density matrices in the symmetric subspace [1]. Such states can be viewed as particular spin states, namely anticoher ... [more ▼]

We investigate multiqubit permutation-symmetric states with maxi- mally mixed reduced density matrices in the symmetric subspace [1]. Such states can be viewed as particular spin states, namely anticoher- ent spin states [2]. Using the Majorana representation of spin states in terms of points on the unit sphere [3], we analyze the consequences of degeneracies of the Majorana points and of a point-group symmetry in their arrangement on the existence of anticoherent spin states. We provide different characterizations of anticoherence and establish a link between point symmetries, anticoherence, and SLOCC classes [4]. We consider in detail the case of small numbers of qubits and solve the 4-qubit case completely by identifying and characterizing all 4-qubit anticoherent states. [1] D. Baguette, T. Bastin, and J. Martin, Phys. Rev. A 90, 032314 (2014); O. Giraud et al., Phys. Rev. Lett. 114, 080401 (2015); D. Baguette et al., Phys. Rev. A 92, 052333 (2015). [2] J. Zimba, Electron. J. Theor. Phys. 3, 143 (2006). [3] E. Majorana, Nuovo Cimento 9, 43 (1932). [4] SLOCC classes : Classes of states equivalent through stochastic local operations with classical communication. [less ▲]

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See detailAnticoherence of spin states with point-group symmetries
Baguette, Dorian ULg; Damanet, François ULg; Giraud, Olivier et al

Poster (2016, March 02)

We investigate multiqubit permutation-symmetric states with maximal entropy of entanglement. Such states can be viewed as particular spin states, namely anticoherent spin states. Using the Majorana ... [more ▼]

We investigate multiqubit permutation-symmetric states with maximal entropy of entanglement. Such states can be viewed as particular spin states, namely anticoherent spin states. Using the Majorana represen- tation of spin states in terms of points on the unit sphere, we analyze the consequences of a point-group symmetry in their arrangement on the quantum properties of the corresponding state [1]. We focus on the identi cation of anticoherent states (for which all reduced density matrices in the symmetric subspace are maximally mixed) associated with point-group-symmetric sets of points. We provide three di erent characterizations of anticoherence and establish a link between point symmetries, anticoherence, and classes of states equivalent through stochastic local operations with classical communication. We then in- vestigate in detail the case of small numbers of qubits and construct in nite families of anticoherent states with point-group symmetry of their Majorana points, showing that anticoherent states do exist to arbitrary order. [1] D. Baguette et al., Phys. Rev. A 92, 052333 (2015). [less ▲]

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See detailMaster equation for collective spontaneous emission with quantized atomic motion
Damanet, François ULg; Braun, Daniel; Martin, John ULg

Scientific conference (2016, March 02)

We derive a markovian master equation for the internal dynamics of an ensemble of two-level atoms including the quantization of their motion. Our equation provides a unifying picture of the effects of ... [more ▼]

We derive a markovian master equation for the internal dynamics of an ensemble of two-level atoms including the quantization of their motion. Our equation provides a unifying picture of the effects of recoil and indistinguishability of atoms beyond the Lamb-Dicke regime on both their dissipative and conservative dynamics. We give general expressions for the decay rates and the dipole-dipole shifts for any motional states, generalizing those in Ref. [1]. We find closed-form formulas for a number of relevant states (gaussian states, Fock states and thermal states). In particular, we show that dipole-dipole interactions and cooperative photon emission [2] can be modulated through the external state of motion. As an application of our general formalism, we study the spatial Pauli blocking of two fermionic atoms beyond the Lamb-Dicke regime [3]. [1] G. S. Agarwal, Springer Tracts In Modern Physics 70, 1 (1974). [2] R. H. Dicke, Phys. Rev. 93, 99 (1954). [3] R. M. Sandner, M. Müller, A. J. Daley & P. Zoller, Phys. Rev. A 84, 043825 (2011). [less ▲]

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