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See detailStudying debris disks with near‐infrared interferometry
Absil, Olivier ULg; Augereau, J.-C.; Le Bouquin, J.-B. et al

Conference (2011, April 13)

In this talk, I will describe and illustrate two different ways in which near-infrared stellar interferometry can be used to constrain the nature and physics of debris disks, and help understand the ... [more ▼]

In this talk, I will describe and illustrate two different ways in which near-infrared stellar interferometry can be used to constrain the nature and physics of debris disks, and help understand the global architecture of planetary systems in general. In the first part of the talk, I will review the on-going efforts to detect bright exozodiacal disks with precision near-infrared interferometry. I will describe the results of the exozodi survey that we are currently carrying out at the CHARA array, and briefly discuss our first results and perspectives with the new PIONIER instrument at the VLTI (including the identification of previously unknown low-mass companions). Preliminary statistical trends on the occurrence of bright exozodi around nearby main sequence stars will be presented, and I will discuss how this information could be used to constrain the global architecture and evolution of debris disks. In the second part of the talk, I will focus on our on-going project to characterize the “spin-orbit” alignment of resolved debris disks with the rotation axis of their (rapidly rotating) host star. Our first result obtained with the VLTI/AMBER spectro-interferometer on Fomalhaut will be presented, as well as its possible consequences on the dynamics of the planetary system and on the physics of the grains composing the Fomalhaut dust ring. I will then briefly describe the status and perspectives of this project. [less ▲]

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See detailRecent Advances in Macromolecular Design via Cobalt-Mediated Radical Polymerization
Debuigne, Antoine ULg; Hurtgen, Marie ULg; Piette, Yasmine ULg et al

Conference (2011, April 13)

This communication will focuse on recent progress in the field of cobalt-mediated radical polymerization (CMRP). For example, the beneficial impact of cobalt complexes on the course of acrylate and vinyl ... [more ▼]

This communication will focuse on recent progress in the field of cobalt-mediated radical polymerization (CMRP). For example, the beneficial impact of cobalt complexes on the course of acrylate and vinyl chloride (VC) polymerizations will be discussed. The addition of conjugated unsaturated derivatives, like dienes, fullerenes and carbon nanotubes, onto (co)polymers preformed by CMRP has also been investigated. Similarities and differences between these radical addition processes will be presented as well as the potential applications of the resulting copolymers and carbon based materials for photodynamic therapy (PDT) and electromagnetic interferences (EMI) shielding. [less ▲]

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See detailSur l'équation fonctionnelle de Cauchy généralisée
Kreit, Damien ULg

Conference (2011, April 13)

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See detailCaractérisation et vieillissement accéléré de pigments de bleu de Prusse synthétisés selon les méthodes de préparation anciennes et modernes
Samain, Louise ULg; Lauricella, Melina; Silversmit, Geert et al

Conference (2011, April 11)

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See detailImproved automatic calibration of groundwater flow models using self-potential measurements
Robert, Tanguy ULg; Therrien, René; Lemieux, Jean-Michel et al

Conference (2011, April 11)

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See detailL'utilisation du fer dans la construction médiévale mosane : explications et premiers repères d'une évolution
Maggi, Christophe ULg; Pagès, Gaspard ULg; Hoffsummer, Patrick ULg et al

Conference (2011, April 11)

The development of a new comparative approach establishing a link between the evaluation of the quantity of barks used in a roof frame and the volume of wood present in this same attic allows the ... [more ▼]

The development of a new comparative approach establishing a link between the evaluation of the quantity of barks used in a roof frame and the volume of wood present in this same attic allows the acquisition of essential information for the apprehension of the economical, the technical and the social contexts in which a timber frame was drawn up. By carrying out this kind of comparison in a systematic way in about thirty attics of religious buildings dispersed in the Walloon region (Belgium), the evolution of these contexts develops step by step since 12th until 18thcentury and highlights phenomena which influence the methods of constructions of the carpenters, like the appearance of the saw or the rarefaction of the forest resources. The confrontation of this result with the evolution of the volume of iron considered in the attics reveals the catch of importance of this material in function of the time and of the architectural principles. Iron appears in the roof frames of our areas in the same time that the advent of the Gothic architecture in link with the increase of the roof’s dimensions. Its employment generalizes then knows a real expansion at the 17th century because of the rarefaction of the forest resources but also because the preindustrial techniques allow it. [less ▲]

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See detailEvaluation of the present and future general circulation over western Europe simulated by the IPCC AR5/CMIP5 GCMs with the help of a circulation type classification
Belleflamme, Alexandre ULg; Fettweis, Xavier ULg; Erpicum, Michel ULg

Conference (2011, April 08)

Downscaling methods forced by General Circulation Model (GCM) simulations are not able to correct the biases in the general circulation simulated by the GCMs. Moreover, since the GCMs have a coarse ... [more ▼]

Downscaling methods forced by General Circulation Model (GCM) simulations are not able to correct the biases in the general circulation simulated by the GCMs. Moreover, since the GCMs have a coarse spatial resolution, they have difficulties to simulate reliably ground variables like temperature and precipitation which are affected by topography, land use and local features. So, we can attempt that they simulate better the large-scale atmospheric circulation. That is why it is of special interest to evaluate the GCM simulations of atmospheric circulation for current climate by comparing them with the NCEP-NCAR 1 and the ECMWF reanalysis data over 1961-1990. This analysis is done over western Europe for summer (JJA) and winter (DJF) for the GCMs (available on http://cmippcmdi.llnl.gov/cmip5/) proposed by the IPCC for its upcoming report (AR5). The method used is an automated circulation type classification based on the daily geopotential height at 500 hPa. It is a leader-algorithm correlation based method taking part of the COST733CAT classification catalogue. Unlike the usually used methods based on the monthly mean circulation, this approach allows a precise analysis of each circulation type. So, it gives much more information on the ability of the GCMs to simulate the different circulation types and consequently the climatic variability of a region. In order to allow a direct comparison between the GCM simulations and the reanalysis data, the classification is done first only for the reanalysis dataset over 1961-1990. Then, the main types individualised here are imposed for the classification of the GCM outputs. Since the circulation types are the same, the comparison between the datasets can be made on the basis of the differences of the frequency distribution throughout the classes. Moreover, the mean intraclass repartition of the circulation situations may differ from one dataset to another. So, the study of this mean and its standard deviation gives an idea of the differences between the reanalysis and the GCMs within each class. Firstly, this approach is applied to current climate (1961-1990) for evaluating the ability of the GCMs driven by the historical experiment to simulate the climate of the last decades over western Europe. In fact, if one GCM is not able to reproduce reliably the main characteristics of the current climate, its future projections may be questionable. Then, the best matching GCMs are retained and the same approach is applied to the future simulations driven by RCP concentrations or emissions (2011-2040, 2041-2070 and 2071-2100). So, the evolution of the frequency of the circulation types and maybe the appearance of new types can be analysed under climate change conditions. Moreover, it is interesting to compare the uncertainty of the current climate simulations to the projected changes for future climate. If the uncertainty is of the same order or higher than the projected changes, the reliability of the simulations for future climate may be very questionable. [less ▲]

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See detailEvaluation of sinks and sources of CO2 in the global coastal ocean using a spatially-explicit typology of estuaries and continental shelves
Laruelle, G. G.; Dürr, H. H.; Slomp, C. P. et al

Conference (2011, April 08)

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See detailCLUPI: the High-Performance Close-up Camera System on board the 2018 ExoMars Rover
Josset, J. L.; Westall, F.; Hofmann, B. A. et al

Conference (2011, April 08)

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See detailMusique, Communication, Mediation. Aspects communicationnels de la pratique musicale : retour réflexif
Lambeau, Céline ULg

Conference (2011, April 08)

Musique, Communication, Médiation La présentation questionne la possibilité de fonder conceptuellement le syntagme « communication musicale », et propose d’étudier la dimension communicationnelle de la ... [more ▼]

Musique, Communication, Médiation La présentation questionne la possibilité de fonder conceptuellement le syntagme « communication musicale », et propose d’étudier la dimension communicationnelle de la pratique musicale collective, en recourant à la notion de « médiation » en tant qu’elle constitue un modèle nouveau permettant d’appréhender les phénomènes de communication impliquant un « tiers » (ici le matériau musical). Ainsi que l’a décrit Jean Davallon : « La notion de médiation apparaît chaque fois qu’il y a besoin de décrire une action impliquant une transformation de la situation et du dispositif communicationnel, et non une simple interaction entre éléments, et encore moins une circulation d’un élément d’un pôle à un autre. (…) Avec ce recours, l’origine de l’action se déplace de l’actant destinateur ou des interactants vers un actant tiers : il y a communication par l’opération du tiers » (Davallon-MEI, 2003, 43). La communication revient en particulier sur la façon dont « la musique », objet du monde appréhendé de manière holistique au début de ma recherche doctorale, a été progressivement saisie dans les différentes « natures » que lui attribue le champ scientifique (notion, pratique sociale, …) , et comment cette redéfinition a permis d'appréhender la « musique » comme un ensemble de pratiques et de représentations, constituant un terrain pour une étude portant sur les dispositifs de médiation, entendu au sens de (Servais 2010) comme "un bon outil pour penser l'impensé des pratiques de communication"(. [less ▲]

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See detailLe confort du piéton dans l'espace public
Reiter, Sigrid ULg

Conference (2011, April 08)

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See detailCombating Child Labour in Burkina Faso: Are the public policies dealing with the impossible?
Wouango, Joséphine ULg

Conference (2011, April 07)

These last years, the objective of abolishing child labour in Burkina Faso (a West African country) has tried to create a national unanimity regarding the commitment of collective actors (decision-makers ... [more ▼]

These last years, the objective of abolishing child labour in Burkina Faso (a West African country) has tried to create a national unanimity regarding the commitment of collective actors (decision-makers, civil society, employers, labor unions and media). It started by integrating the National Program of child welfare and the schedule of the Ministry of Employment, Ministry of Social Action, and the Ministry of Education. Burkina Faso joined the International Programme on the Elimination of Child Labour (IPEC) in 1999, created a department of fight against child labour in 2006 and raised the minimum age for admission to employment from 14 to 16 years. This paper supports a critical view of global actions to fight child labour and discusses the complexities of this issue in Burkina Faso. Using an analysis of the State’s National Plan of Action on the elimination of child Labour and two local cases studies on projects that are aimed at removing children from their work, it shows how the local context of working children and their parents are ignored in order to comply with international policy agenda and to cater to donor demands. [less ▲]

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See detailParticipation à une table ronde
Henneau, Marie-Elisabeth ULg

Conference (2011, April 07)

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See detailEast Asian Social Enterprises in a Worldwide Perspective
Defourny, Jacques ULg

Conference (2011, April 07)

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See detailEmotion, corps et conscience magique chez Sartre
Cormann, Grégory ULg

Conference (2011, April 06)

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See detailLe DouglasModel et nos futurs projets CAPSIS
Ligot, Gauthier ULg; Perin, Jérôme ULg; de Pierpont, Astrid ULg

Conference (2011, April 06)

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See detailL'entrepreneuriat social et l'économie sociale
Defourny, Jacques ULg

Conference (2011, April 06)

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See detailOndes de choc et pathologies abarticulaires
Kaux, Jean-François ULg

Conference (2011, April 06)

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See detailExplanation of the extreme low surface mass balance over the Greenland ice sheet in 2010 with the help of a regional climate model and a circulation type classification.
Fettweis, Xavier ULg; van den Broeke, Michiel; van de Berg, Willem Jan et al

Conference (2011, April 06)

The regional climate models MAR and RCMO show that the surface mass balance (SMB) rate of the whole Greenland ice sheet (GrIS) is the lowest in 2010 since 50 years. This record is a combination of an ... [more ▼]

The regional climate models MAR and RCMO show that the surface mass balance (SMB) rate of the whole Greenland ice sheet (GrIS) is the lowest in 2010 since 50 years. This record is a combination of an abnormal dry year and an exceptional melt in summer confirmed by ground measurements and satellite-derived observations. An automated circulation type classification (CTC) is used for detecting anomalies in the daily atmospheric circulation at 500hPa over the Greenland ice sheet during 2010. The CTC reveals that the low snow accumulation is due to the general circulation (negative NAO index) while the record melt in summer is rather a consequence of the well known surface albedo-temperature feedback induced by - a warmer and thinner than normal snowpack above the bare ice at the end of the spring. - an earlier beginning of the melt season. - a drier summer. - an exceptional persistence of atmospheric circulations inducing warm and dry conditions over the GrIS. All these anomalies induced in summer 2010 an exceptional time exposure of bare ice areas (with a lower albedo than snow) over the GrIS which impacts the surface melt. Sensitivity experiments carried out by the MAR model allow to estimate the importance of each anomaly in the record simulated melt of summer 2010. [less ▲]

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See detailPegase, a model dedicated to Surface WAter Quality Assessment that helps stakeholders implementing the WFD
Deliège, Jean-François ULg; Grard, Aline ULg; Everbecq, Etienne ULg et al

Conference (2011, April 06)

Pegase, a model dedicated to surface water quality assessment that helps stakeholders implementing the WFD. That presentation showed 2 different applications directly made by the stakeholders in charge of ... [more ▼]

Pegase, a model dedicated to surface water quality assessment that helps stakeholders implementing the WFD. That presentation showed 2 different applications directly made by the stakeholders in charge of the water management at the basin scale. The end-users analysed results of the Pegase model in the scope of implementation of the WFD. Differents scenarios were build in order to simulate the way to reach the good status for water bodies. Associated costs were estimated and relevant decisions were oriented using the results of the numerical Pegase tool. [less ▲]

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See detailMerging satellite and in situ sea surface temperature data using DINEOF
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Beckers, Jean-Marie ULg

Conference (2011, April 05)

High quality sea surface temperature data sets are needed for various applications, including numerical weather prediction, ocean forecasting and climate research. The coverage, resolution and precision ... [more ▼]

High quality sea surface temperature data sets are needed for various applications, including numerical weather prediction, ocean forecasting and climate research. The coverage, resolution and precision of individual sea surface temperature observations is not sufficient for these applications, therefore merging of complementary data sets is needed to increase the coverage and to reduce the final data set error. DINEOF (Data Interpolating Empirical Orthogonal Functions) is an EOF-based technique to reconstruct missing information -due to clouds, for example in satellite data sets. A new development of this method consists in its capability to merge different data sources into one estimate. This development is tested using AVHRR data of the western Mediterranean Sea and in situ data from various international databases (World Ocean Database (WOD), MEDAR/Medatlas, Coriolis Data Center, International Council for the Exploration of the Sea (ICES) and International Comprehensive Ocean-Atmosphere Data Set (ICOADS)). An error assessment between the satellite and in situ data is performed first, in order to determine the error statistics between these two data sources. The error is calculated by database, platform type (CTD, XBT, drifters, bottles and ships) and depth. This error assessment is used to merge the in situ and satellite data. The impact of the sensor-specific errors on the quality of the final product will be assessed, and compared to the results obtained when the same error estimate is used for all sensors. The benefit of using in situ data in addition to satellite data will be also discussed. Additional information can be found at http://modb.oce.ulg.ac.be/mediawiki/index.php/DINEOF and http://gherdiva.phys.ulg.ac.be/DINEOF/ [less ▲]

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See detailGlacial CO2 cycle as a succession of key physical and biogeochemical processes
Brovkin, Victor; Ganopolski, Andrey; Munhoven, Guy ULg et al

Conference (2011, April 05)

Ice core records of atmospheric CO2 concentration through the last 800,000 years show the carbon cycle amplifying the climate forcing from variations in Earth’s orbit. This positive climate-carbon cycle ... [more ▼]

Ice core records of atmospheric CO2 concentration through the last 800,000 years show the carbon cycle amplifying the climate forcing from variations in Earth’s orbit. This positive climate-carbon cycle feedback could weaken or even possibly reverse present-day fossil fuel CO2 uptake by the natural carbon cycle. Despite much effort over the last two decades, a mechanistic, process-based explanation of the carbon cycle feedbacks responsible for the glacial / interglacial CO2 cycles remains elusive.We will present first transient simulations of the last glacial cycle using an Earth System model of intermediate complexity to predict atmospheric CO2 , driven by orbital changes and reconstructed radiative forcing from greenhouses gases, ice, and aeolian dust. The model is able to reproduce the main features of the CO2 changes: a 50 ppmv CO2 drop during glacial inception, a minimum concentration at the last glacial maximum 80 ppmv lower than the Holocene value, and an abrupt 60 ppmv CO2 rise during the deglaciation. The model deep ocean d13 C also resembles the reconstructions from the real ocean. The main drivers of atmospheric CO2 evolve with time: changes in sea surface temperature and volume of bottom water of southern origin exert CO2 control during the glacial inception and deglaciation, while changes in carbonate chemistry and marine biology are dominant during the first and second parts of the glacial cycle, respectively. Changes in terrestrial carbon storage counteract oceanic mechanisms during glacial inception and deglaciation, unless the potential for permafrost development is included in the soil carbon model. These feedback mechanisms could also significantly impact the ultimate climate response to the anthropogenic perturbation. [less ▲]

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See detail"L'archive comme espace de re-création"
Belloi, Livio ULg

Conference (2011, April 05)

Cette communication se propose d'aborder l'archive comme un espace de re-création pour divers artistes contemporains. Elle se concentre sur les œuvres récentes du cinéaste autrichien Gustav Deutsch ... [more ▼]

Cette communication se propose d'aborder l'archive comme un espace de re-création pour divers artistes contemporains. Elle se concentre sur les œuvres récentes du cinéaste autrichien Gustav Deutsch, nommément "Welt Spiegel Kino" (2005) et "Film ist. a girl & a gun" (2009), qui réaniment littéralement le patrimoine cinématographique, lui conférant une urgence nouvelle. [less ▲]

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See detailThe Contemporary Significance of Historical Legacies in Belgium
Reuchamps, Min ULg

Conference (2011, April 05)

Since 1993, Belgium is officially a federal state, composed of – three – communities and – three – regions, as the – new at the time – first article of the Constitution proclaims. The history of ... [more ▼]

Since 1993, Belgium is officially a federal state, composed of – three – communities and – three – regions, as the – new at the time – first article of the Constitution proclaims. The history of federalism in Belgium is therefore quite recent. Nevertheless, the story is – much – longer since it starts with the independence of Belgium from the United Kingdom of the Netherlands in 1830. The very beginning of a state and the underlying causes of its creation, as well as its place on the map, the timing of its creation and the characteristics of the elites who take the lead and define the new state’s nature are of crucial importance and these elements shape the country’s political development for centuries. Nonetheless, although the beginning of any state sets up a path dependency, there are also critical junctures along its political development which in turn influences the course of history. This is especially true for Belgium. Here, history and politics are intrinsically interrelated. Indeed, these dual dynamics – history as politics and politics as history – are at the heart of Belgium’s federalism. To explore these dynamics, this paper distinguishes three key variables of the historical-political relationship in order to apprehend the contemporary significance of historical legacies in Belgium. The first variable is the territorial principle vs. linguistic principle debate, which constitutes the backbone of the so-called Belgian community question – or in other words the foremost divisive issue of federalism in Belgium. The second variable is the political parties because they have played and play the major role in Belgian politics and therefore in the Belgian federal dynamics. The third variable is made of the people; that is, at the individual level, the inhabitants or the citizens or the voters and, at the collective level, the communities and/or the nations of Belgium. These three variables are at the heart of Belgium’s past, present and future and continuously interact with one another – i.e. they form a triangle of interactions. In order to offer a clear picture of these interactions, Belgium’s history is divided into three periods: before federalism (1830-1960), federalism (1960-2010) and after federalism (2010-onwards). This division in three variables and in three periods structures the paper. [less ▲]

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See detailDe ‘l’acte-trace’ à ‘l’acte-image’: le fait terroriste comme producteur d’emblèmes historiques
Hamers, Jérémy ULg

Conference (2011, April 05)

Un boeing de la Lufthansa immobilisé sur le tarmac de l’aéroport de Mogadiscio, la vidéo de l’otage Hanns Martin Schleyer filmé par ses ravisseurs de la Fraction Armée Rouge, quelques cadavres bâchés dans ... [more ▼]

Un boeing de la Lufthansa immobilisé sur le tarmac de l’aéroport de Mogadiscio, la vidéo de l’otage Hanns Martin Schleyer filmé par ses ravisseurs de la Fraction Armée Rouge, quelques cadavres bâchés dans des décors vides de banlieues cossues, telles sont les images d’archives qui aujourd’hui illustrent l’ensemble des années de plomb allemandes. Qu’elles fassent l’objet de reconstitutions au cinéma (La bande à Baader, Uli Edel, 2008), qu’elles servent de vecteurs d’authentification dans des docudrames (Jeux mortel, Heinrich Breloer, 1997), ou qu’elles subissent moult recyclages dans la sphère de l’art contemporain (Meinhof, Johannes Kahrs, 2001 ; Die Toten, Hans-Peter Feldmann, 1998), ces quelques représentations récurrentes semblent résumer et figurer à elles seules l’ensemble des événements qui ont fait la crise terroriste allemande dans les années septante. Conformément à un processus autonome de « métonymisation » des représentations, ces images d’archives renvoient ainsi à une multitude d’événements qui n’entretiennent parfois qu’un rapport très ténu avec les représentations proprement dites. Or, la plupart des recherches qui s’attachent à cet élargissement sémantique considèrent que ce détachement des images de leur référent originel et spécifique est avant tout tributaire du vieillissement des représentations. A rebours de cette conception de l’image d’archives comme produit d’une réduction du réel à quelques représentations, nous ambitionnons de retourner à la genèse de ces objets visuels devenus emblèmes des années de plomb pour démontrer qu’au moment même de leur conception, de leur réalisation et de leur première diffusion, ces photos et photogrammes posent déjà les bases pragmatiques nécessaires à leur accession au statut de représentations emblématiques, et ce, bien avant leur vieillissement. [less ▲]

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See detailAssimilation of the 1979-2009 microwave satellite data into the regional climate MAR model for studying the Greenland ice sheet melt extent
Fettweis, Xavier ULg; Tedesco, Marco; van den Broeke, Michiel

Conference (2011, April 05)

The 1979-2009 melt extent derived from the amount of produced meltwater by day simulated by the regional climate model MAR and derived from the spaceborne microwave 19GHz horizontal polarizated (T19H ... [more ▼]

The 1979-2009 melt extent derived from the amount of produced meltwater by day simulated by the regional climate model MAR and derived from the spaceborne microwave 19GHz horizontal polarizated (T19H) brightness temperature compares well over the Greenland ice sheet (GrIS). However, some disagreements still occur in some pixels for any days. Therefore, we run the MAR model in an assimilation mode, constrained by the daily SMMR-SSM/I derived melt extent over 1979-2009. As assimilation, we change the MAR near-surface snowpack temperature for the pixels where MAR and satellite disagree. This correction allows to conserve the water equivalent of the snowpack mass in MAR while having a full agreement between model and satellite derived melt extent. The assimilation helps to improve the meltwater production simulation as well as the matching with other satellite data sets (MODIS, GRACE, ...), with the objective to reduce the uncertainties of the current SMB model-based estimates over the GrIS. [less ▲]

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See detailEvaluation of the Greenland ice sheet surface mass balance simulated by a regional climate model forced by some selected IPCC AR5/CMIP5 AOGCMs over the current climate.
Fettweis, Xavier ULg; van den Broeke, Michiel; van de Berg, Willem Jan et al

Conference (2011, April 05)

Abstract. As part of the ICE2SEA project, the regional climate model MAR was forced by the general circulation model ECHAM5 for making future projections of the Greenland Ice Sheet (GrIS) Surface Mass ... [more ▼]

Abstract. As part of the ICE2SEA project, the regional climate model MAR was forced by the general circulation model ECHAM5 for making future projections of the Greenland Ice Sheet (GrIS) Surface Mass Balance (SMB) over 1980-2099 at a resolution of 25km. For the A1B scenario, MAR projects a highly negative (-500 GT/yr) SMB rate at the end of this century and a induced mass loss corresponding to a sea level rise of ~7 cm over 2000-2100. However, the comparison with MAR forced by the ERA-40 reanalysis over 1980-1999 shows that MAR forced by the 20C3M scenario is not able to represent reliably the current SMB due to biases in the general circulation and in the free atmosphere summer temperature modeled by ECHAM5 around the GrIS. These biases induce in MAR an underestimation of the snow accumulation and an overestimation of the surface melt. Therefore, this questions the reliability of these ECHAM5-forced future projections, knowing that i) these biases could be amplified in future and that ii) the MAR outputs are used to force ice sheets models for the ICE2SEA project. That is why, by waiting the outputs from the next generation of GCMs (CMIP5), we investigate the impacts of current climate biases over the future projections and we suggest corrections of ECHAM5 forcing files for having a better agreement with the ERA-40 forced simulation. This is useful for the ice sheet model wanting to use the absolute values of MAR future projections instead of anomalies. [less ▲]

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See detailModelling the Middle Miocene fluctuations in ocean biological productivity, ocean carbon isotopic composition and atmospheric CO2 level
Jacquemin, Ingrid ULg; François, Louis ULg; Diester-Haass, Liselotte et al

Conference (2011, April 05)

The Middle Miocene (17.5-13.5 Ma) is characterized by high frequency fluctuations in the seawater delta13C record with six distinct delta13C maxima linked to Earth orbital cycles (mainly the 400 kyr ... [more ▼]

The Middle Miocene (17.5-13.5 Ma) is characterized by high frequency fluctuations in the seawater delta13C record with six distinct delta13C maxima linked to Earth orbital cycles (mainly the 400 kyr eccentricity cycle). These fluctuations are negatively correlated with the delta18O variations and, on the other hand, marine data show that the ocean productivity tends to be higher during warmer periods. However, on the long term, these three indicators show a different relationship: the productivity does not show any major trend, while a positive excursion of the delta13C is observed (the so-called Monterey event) and is accompanied by a warming, i.e., a decrease in the delta18O. The question of the long-term trend has already been addressed in a previous study (Diester-Haass et al., Paleoceanography, 24, PA1209, 2008), where the positive excursion in delta13C was explained by the storage in sediments of organic carbon from continental origin. In the current study we hypothesize that the short-term (400 kyr cycle) fluctuations of the marine delta13C are mainly linked to sea level and marine productivity changes and not to changes in the terrestrial environment, explaining the different relationship between the isotopic indicators for this shorter as compared to the longer timescale. We test this hypothesis by using a global geochemical box model representing the carbon, alkalinity, phosphorus and oxygen cycles and coupled to an energy balance climate model. The model is forced with sea level fluctuations associated with the observed variations of ocean delta18O. We first evaluate the changes in continental weathering associated with these sea level fluctuations and the related climate change. The model shows that these changes in weathering cannot explain the observed amplitude of marine productivity and ocean delta13C variations over the 400 kyr eccentricity cycle. We then test the assumption that these high frequency delta13C variations were the result of a change in the turnover rate of the oceans, with higher upwelling rates and higher productivity during warmer periods. Results of model sensitivity tests indicate that this hypothesis is plausible, since it leads to approximately correct amplitudes and phases of the oceanic productivity and delta13C signals. Thus, the following picture emerges that, in the Middle Miocene, the short-term fluctuations in oceanic delta13C are driven by ocean circulation and productivity changes, while the trends at longer timescales are linked to a change in the burial rate of continental organic carbon. From this picture, the model is able to provide a geochemical history of the Middle Miocene ocean-atmosphere system consistent with the marine delta13C record. In this reconstructed history, the atmospheric CO2 level only shows small variations, with a slight decrease from the Lower Miocene (about 310 ppmv at 19 Ma) to the Middle Miocene (280 ppmv at 16 Ma) followed by a small increase thereafter (310 to 320 ppmv near 12 Ma). This history is relatively consistent with the marine 13C isotopic proxies for atmospheric CO2. [less ▲]

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See detailNMR Spectroscopy actinide complexes: In search of covalency effects
Desreux, Jean-François ULg; Vidick, Geoffrey ULg; Bouslimani, Nouri et al

Conference (2011, April 05)

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See detailEOF analysis of Sea Surface Temperature in the Canary Island - Madeira region
Troupin, Charles ULg; Alvera Azcarate, Aïda ULg; Barth, Alexander ULg et al

Conference (2011, April 05)

We analyzed Sea Surface Temperature (SST) images in a region covering the Canary Islands and Madeira archipelagos, with the following objectives 1. The reconstruction of incomplete SST satellite images ... [more ▼]

We analyzed Sea Surface Temperature (SST) images in a region covering the Canary Islands and Madeira archipelagos, with the following objectives 1. The reconstruction of incomplete SST satellite images during the year 2009. 2. The determination of the main spatial and temporal patters in the region. SST images for 2009 are downloaded from the Medspiration project (http://www.medspiration.org). The images consist of combined measurements from several satellite systems. The images with less than 5% of valid pixels (e.g., clouds) were removed, so that out of the 365 initial images, 347 were kept. The method used in this work for the reconstruction of missing data is Data INterpolating Empirical Orthogonal Functions (DINEOF, Alvera-Azcárate et al., 2005). The results show that the first mode is largely dominant, with 87% of the variance explained, and represents the regional seasonal cycle. The second mode accounts for 9% of the variance and depicts a separation between coastal waters and open-ocean waters. The signal of the Cape Ghir upwelling filament is also present in the second mode. The reconstruction allows one to reproduce the characteristic mesoscale features of the region: the coastal upwelling, the island wakes (Gran Canaria, Madeira, ... ), the filament and the eddies in the lee of the main islands. A near-operational version of the reconstruction has been implemented and is available at http://gher-diva.phys.ulg.ac.be/DINEOF/dineof_allCAN.html [less ▲]

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See detailLinguistic innovations and evolution of registers in the Deir el-Medineh community: Scribal networks and families during the 20th dynasty
Polis, Stéphane ULg

Conference (2011, April 05)

The aim of this lecture was to investigate the relation between scribal variation and language change in pre-Demotic Egyptian, focusing more specifically on “The best case scenario in the worst cultural ... [more ▼]

The aim of this lecture was to investigate the relation between scribal variation and language change in pre-Demotic Egyptian, focusing more specifically on “The best case scenario in the worst cultural environment”, i.e. the text community of Deir el-Medineh during the 20th Dynasty. The talk was methodologically oriented and several case-studies (related to the diaphasic and diachronic dimensions of variation) were presented in order to illustrate some principles and to suggest new ways of investigation in the description of Ancient Egyptian variation. Additionally, the possibility of a scribal network analysis of the written material found in Deir el-Medineh has been discussed. [less ▲]

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See detailLa (photo)production d'hydrogène par les microorganismes
Lecler, Renaud ULg

Conference (2011, April 04)

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See detailMacroevolution in early eukaryotes
Javaux, Emmanuelle ULg

Conference (2011, April 04)

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See detailComment adéquatement déclarer valide ou non valide une méthode analytique ?
Rozet, Eric ULg; Hubert, Philippe ULg

Conference (2011, April 04)

Vu le rôle central que jouent les méthodes d’analyse dans l’ensemble des activités tant de l’industrie (bio)pharmaceutique, agro-alimentaire, chimique ou dans l’environnement, il est essentiel de les ... [more ▼]

Vu le rôle central que jouent les méthodes d’analyse dans l’ensemble des activités tant de l’industrie (bio)pharmaceutique, agro-alimentaire, chimique ou dans l’environnement, il est essentiel de les valider. Les critères de validation ne sont pas une finalité et il est nécessaire de rappeler l’objectif d’une méthode analytique et de sa validation afin de planifier adéquatement cette étape de validation. Par ailleurs, les approches de décision habituelles qui se basent seulement sur des estimateurs ponctuelles ne répondent pas à l’objectif de la validation. Une stratégie alternative pour décider de la validité des méthodes est proposée utilisant les intervalles de tolérance : "ß-expectation tolerance interval". [less ▲]

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See detailLong baseline interferometry applied to the study of colliding-wind massive binaries: current status and prospects for the near future
De Becker, Michaël ULg

Conference (2011, April 04)

Massive binaries are important laboratories to investigate science topics related to stellar astrophysics. In particular, colliding winds in some massive binaries are known to produce strong X-ray ... [more ▼]

Massive binaries are important laboratories to investigate science topics related to stellar astrophysics. In particular, colliding winds in some massive binaries are known to produce strong X-ray emission, to accelerate particles, and to act as nucleation site for dust particles. Recent advances in the development of interferometric instruments coupled to long baseline facilities such as the VLTI allow us to observe astronomical targets at the milli-arcsecond scale. In the context of the study of colliding-wind binaries, this tool is likely to provide crucial information. I will briefly discuss ongoing observation campaigns aiming at using such interferometric facilities in the purpose to study the physics of colliding-wind binaries. [less ▲]

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See detailActualités de la procédure fiscale en matière d'impôts sur les revenus
Herve, Luc ULg

Conference (2011, April 04)

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See detailResponsible innovation and nanotechnologies
Thoreau, François ULg

Conference (2011, April 04)

Dès le départ, le développement des nanotechnologies a été fortement soutenu par les pouvoirs publics et marqué par une vision particulière du futur de nos sociétés occidentales. C'est notamment pour ... [more ▼]

Dès le départ, le développement des nanotechnologies a été fortement soutenu par les pouvoirs publics et marqué par une vision particulière du futur de nos sociétés occidentales. C'est notamment pour cette raison que les sciences humaines et sociales (SHS) ont été conviées à participer à la réflexion autour des nanotechnologies, dans le cadre plus général (et concomitant) de l'innovation responsable. Que ce soit aux États-Unis ou en Europe, cette évolution s'est traduite par des tentatives de mobiliser les savoirs produits en SHS, et des les rendre "opérationnels" directement au coeur des processus d'innovation, de recherche et développement. Cette démarche d'"intégration", selon la dénomination consacrée, entend briser les barrières disciplinaires. Nous abordons l'un de ces programmes de recherche spécifique, auquel nous avons collaboré, et en tirons les conclusions provisoires ainsi que quelques conséquences. [less ▲]

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See detailSatellite and in situ sea surface temperature comparison and merging in the Mediterranean Sea.
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Beckers, Jean-Marie ULg

Conference (2011, April 03)

A comparison between in situ and satellite sea surface temperature (SST) for the western Mediterranean Sea is presented. Several international databases are used to extract in situ data: World Ocean ... [more ▼]

A comparison between in situ and satellite sea surface temperature (SST) for the western Mediterranean Sea is presented. Several international databases are used to extract in situ data: World Ocean Database (WOD), MEDAR/Medatlas, Coriolis Data Center, International Council for the Exploration of the Sea (ICES) and International Comprehensive Ocean-Atmosphere Data Set (ICOADS). The in situ data are classified into different platforms or sensors (CTD, XBT, drifters, bottles, ships), in order to assess the average difference between these type of data and AVHRR (Advanced Very High Resolution Radiometer) SST satellite data. Attention is given also to the relative accuracy of each database, and advantages and shortcomings on the use of each database will be discussed. The error assessment will be used to merge in situ and satellite SST data using DINEOF (Data Interpolating Empirical Orthogonal Functions), an EOF-based technique. The impact of the sensor-specific errors on the quality of the final product will be assessed, and compared to the results obtained when a more general error estimate is used. [less ▲]

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See detailRéguler et financer croyances et convictions en Europe aujourd’hui : nouvelles questions ou vieilles lunes ?
Husson, Jean-François ULg

Conference (2011, April 02)

Ce colloque, organisé par le Pr François Foret (ULB), visait à aborder divers aspects des relations Eglises-Etats. Ma contribution portait sur le financement des cultes et des communautés non ... [more ▼]

Ce colloque, organisé par le Pr François Foret (ULB), visait à aborder divers aspects des relations Eglises-Etats. Ma contribution portait sur le financement des cultes et des communautés non confessionnelles comme indicateur des relations entre pouvoirs publics et acteurs convictionnels. Les conséquences, attendues et inattendues, du financement étaient ensuite discutées. [less ▲]

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See detailLa thématique de l’offrande dans la tombe de Niankhkhnoum et Khnoumhotep
Sojic, Nathalie ULg

Conference (2011, April 02)

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See detailSerious violations of international humanitarian rules, a collective acting out?
Pierre, Alexia ULg

Conference (2011, April 01)

The serious offenses against civilian populations perpetrated by governmental and non-governmental armed forces are illegal view to the internationally established norms. These acts need primary support ... [more ▼]

The serious offenses against civilian populations perpetrated by governmental and non-governmental armed forces are illegal view to the internationally established norms. These acts need primary support of the perpetrators and groups involved. As regards armed forces, processes of obedience to authority can explain breaking of War Law. Concerning mass violations due to civilians, an adhesion process to ideology of destruction is needed. Contributions of Freud in the field of leadership, the inversion of moral values and social desirability to this new order, as well as emotional manipulation of people, are elements of explanation of collective and massive acting out. To prevent these mass crimes, a study of the component parts which support them could allow us to understand the mechanisms in play. [less ▲]

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See detailL'interet des connaissances initiales en radiographie pour le marechal-ferrant
van Thielen, Bert; Noble, Prisca ULg

Conference (2011, April 01)

The farrier is an important actor on the equine locomotor apparatus. The objective of this communication is to show direct and indirect interests for the farrier to use some radiological informations in ... [more ▼]

The farrier is an important actor on the equine locomotor apparatus. The objective of this communication is to show direct and indirect interests for the farrier to use some radiological informations in his work. Today, however the existence of some new sophisticated imaging technics, radiography is the first choice to appreciate an equine locomotor lesion. The direct interest of radiography, when it concerns the distal limb, is to guide to the conception of an adapted orthopeadic horseshoe. The indirect interest of radiography, when it concerns proximal regions like shoulder, back or pelvic, is to help in the understanding of the whole horse as the loading of the joints is closely connected (Noble et al. 2010).The Objective of this presentation is to propose the basis in radiography of the horse, to give some examples in the equine digit radiopathology and to explain how several radiographic informations could be used by the farrier in his work process. [less ▲]

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See detail3D Modelling of the Black Sea Ecosystem
Capet, Arthur ULg; Grégoire, Marilaure ULg

Conference (2011, April)

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See detailLa réglementation de la répartition géographique des sièges en Belgique : perspectives juridique et historique
Bouhon, Frédéric ULg

Conference (2011, April)

La communication examine la question de la répartition géographique des sièges de la Chambre des représentants et du Sénat belges. Après l'analyse de quelques notions et questions théoriques utiles à l ... [more ▼]

La communication examine la question de la répartition géographique des sièges de la Chambre des représentants et du Sénat belges. Après l'analyse de quelques notions et questions théoriques utiles à l'exposé (tel que le concept de circonscription), l'exposé passe en revue la manière dont la répartition des sièges est organisée dans plusieurs États européens avec des profils différents (unitaires ou fédéraux, unilingues ou plurilingues, etc). Cette introduction sert de toile de fond à l'étude de l'évolution des règles de répartition géographique des sièges en Belgique de 1831 à nos jours et permet de rechercher, en particulier, quel est l'impact des réformes de l'État belge sur ces règles. [less ▲]

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See detailCaryl Phillips's Drama: Fiction Under Construction
Ledent, Bénédicte ULg

Conference (2011, April)

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See detailAt the other end of the field lines: the satellite footprints
Bonfond, Bertrand ULg

Conference (2011, April)

The electromagnetic perturbations caused by the interaction between the moons Io, Europa, and Ganymede and the Jovian magnetosphere propagate along magnetic field lines in the form of Alfvén waves and ... [more ▼]

The electromagnetic perturbations caused by the interaction between the moons Io, Europa, and Ganymede and the Jovian magnetosphere propagate along magnetic field lines in the form of Alfvén waves and finally create auroral footprints in Jupiter’s polar ionosphere. Thanks to the high spatial and temporal resolution of the Hubble Space Telescope, the analysis of the footprints in the Far UV domain provides extremely valuable information on these interactions. In the case of the Io footprint, the analysis of the multiplicity of the auroral spots and of their relative motion resulted into a new understanding of the far field interaction, which involves trans-hemispheric electron beams. Consistent with the in-situ energetic electrons observations, this scenario has been later reinforced by theoretical models simulating the Alfvén wave’s propagation and the ways these waves accelerate electrons. Moreover, while the altitude and the vertical profile of the auroral emissions provide crucial information on the energy of the precipitating electrons, the measure of the shape of the different sub-structures of the satellite footprints provides important clues about the size of the interaction region. The evolution of the footprint brightness is also an essential parameter for understanding the energies involved in the interaction. Finally, the study of the satellite footprints can also be used for broader purposes than just the investigation of the satellite-magnetosphere interaction, such as building more accurate Jovian magnetic field models. [less ▲]

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See detailUtilisation de la signature pigmentaire du phytoplancton pour la mise au point d’un indice de composition
Goffart, Anne ULg

Conference (2011, April)

Sur base de la sensibilité du phytoplancton aux apports anthropiques de sels nutritifs, la DCE a retenu un indicateur « Phytoplancton » pour contribuer à caractériser l’état écologique des masses d’eau ... [more ▼]

Sur base de la sensibilité du phytoplancton aux apports anthropiques de sels nutritifs, la DCE a retenu un indicateur « Phytoplancton » pour contribuer à caractériser l’état écologique des masses d’eau. Il est composé de trois indices : la biomasse, l’abondance et la composition. La biomasse et l’abondance sont caractérisées par des métriques qui sont déjà validées ou en cours de l’être au niveau européen. Cette étude cible la composition du phytoplancton et utilise la signature pigmentaire des communautés pour développer un nouvel indice de composition taxonomique (IC Medit). L’indice IC Medit est adapté aux spécificités des eaux côtières méditerranéennes et aux besoins de la DCE. Il 1) caractérise l’évolution naturelle de la distribution saisonnière de 2 grands ensembles phytoplanctonique-clés; 2) incorpore la variabilité interannuelle des communautés; 3) reflète l’évolution de la qualité des masses d’eau; 4) permet d’émettre des hypothèses sur le type de pressions qui modifient la composition phytoplanctonique. [less ▲]

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See detailCross-Border Same Sex Relationships - Private international law aspects
Wautelet, Patrick ULg

Conference (2011, April)

This presentation attempts to give an overview of the private international law rules pertaining to same sex relationships (marriages and partnerships) in Europe, in order to examine whether there exists ... [more ▼]

This presentation attempts to give an overview of the private international law rules pertaining to same sex relationships (marriages and partnerships) in Europe, in order to examine whether there exists a consensus among the countries concerned, what are the difficulties arising out of the lack of consensus and how these difficulties can best be tackled. The proceedings of the conference will appear in a book published by Intersentia (Boele Woelki/Fuchs, Legal Recognition of Same-Sex Relationships in Europe, Antwerp, 2nd ed. 2011). [less ▲]

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See detailAssimilation of high-frequency radar currents in the Ligurian Sea
Barth, Alexander ULg; Chiggiato, Jacopo; Alvera Azcarate, Aïda ULg et al

Conference (2011, April)

The circulation in the Ligurian Sea is dominated by strong currents, namely the Western Corsican Current and the East Corsican Current, which jointly form the Northern Current. A high mesoscale activity ... [more ▼]

The circulation in the Ligurian Sea is dominated by strong currents, namely the Western Corsican Current and the East Corsican Current, which jointly form the Northern Current. A high mesoscale activity, including meanders and eddy formation, is associated to those energetic currents. The non-linear instability processes and apparently chaotic behavior of this current system make this region a challenging testbed for data assimilation. High-frequency radar surface currents have been measured by the NATO Undersea Research Centre (NURC), La Spezia, Italy from two sites at the Italian Coast (Isola Palmaria and San Rossore). Each of those sites measures the radial currents relative to the position of the radar system. This WERA system captures well the general circulation and mesoscale flow features. The present study shows an application of the assimilation of those measurements in a nested model con- figuration of the Ligurian Sea. It is assumed that the error in the model surface currents comes primarily from uncertainties in the lateral boundary conditions and surface wind fields. The objective of this study is to reduce the uncertainty in these forcing fields by data assimilation. An ensemble of 100 perturbed lateral boundary conditions and surface wind fields is created to take the uncertainty into account. Using an ensemble-smoother technique described in Barth et al, 2010 (Ocean Science) and Barth et al, 2010 (Ocean Dynamics, in press), improved estimates of the wind forcing and boundary conditions are obtained. By rerunning the model with the updated forcing fields, it is verified that the analyzed model solution is closer to the observed HF radar currents. This technique is similar to 4D-Var, but since it is based on the ensemble covariance between forcing fields and observations, it does not require the formulation of an adjoint. [less ▲]

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See detailDe la datation des terres cuites à la chronologie de l'architecture de l'Antiquité tardive : étude de sites aquitains
Bouvier, Armel; Blain, Sophie ULg; Guibert, Pierre

Conference (2011, April)

Detailed reference viewed: 12 (0 ULg)
See detailLa circonscription électorale fédérale: une approche délibérative de la question
Dodeigne, Jérémy ULg

Conference (2011, April)

Belgium constitutes a good illustration of Mill’s statement about public opinion in divided societies: “the united public opinion…cannot exist [in a country which citizens] read and speak different ... [more ▼]

Belgium constitutes a good illustration of Mill’s statement about public opinion in divided societies: “the united public opinion…cannot exist [in a country which citizens] read and speak different languages” (1993: 391-7). However, according to Lijphart (2007), sociological and political divisions are not problematic. On the contrary, his seminal work on consociationalism promotes such separations among social groups through power-sharing and self-rule. Concerning its electoral system, Belgium represents a striking case of consociational design; whereas criticised by several due to its consequences on the Belgian political system. Indeed, it implies an ethnicisation of political life while it favours intra-groups’ claims escalation as well as it prevents inter-groups communication. In this respect, the proposal for a federal electoral constituency (FEC) in Belgium was put back on the agenda in 2007. First proposed in 1979, the proposal was quite fairly debated during the electoral campaign and government formation.This proposal offers deliberative perspectives to that question. Indeed, electoral studies do not tackle citizens’ perceptions, at least not directly, nor do they focus on reasons of citizens’ opinions. Yet, a specific deliberative methodology (scenario workshop) can explore this research path. Based on data collected during autumn 2009, we can offer tentative answers to crucial questions relating to citizens’ opinions about the FEC: what do they think? Do they feel involved and concerned by this debate? Do they agree or disagree with the electoral reform proposal? And, more importantly, why do they think so when invited to deliberate with other citizens, politicians and experts? [less ▲]

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See detailStudying the Lausanne Trilogue Play Paradigm in the Clinical Assessment Process
Miscioscia, Marina ULg; Simonelli, Alessandra; Gatta, Michela et al

Conference (2011, April)

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See detailCross border capital market litigation
Wautelet, Patrick ULg

Conference (2011, April)

The presentation attempts to capture some of the most striking questions posed by cross-border capital market litigation. These questions are studied using as background the rules of European private ... [more ▼]

The presentation attempts to capture some of the most striking questions posed by cross-border capital market litigation. These questions are studied using as background the rules of European private international law. The purpose of the presentation was not only to provide information on these rules, but also to verify whether the application of these rules indeed raise difficult issues and, if yes, whether changes are needed. [less ▲]

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See detailFGF23 and Klotho: an emerging role in phosphate metabolism
CAVALIER, Etienne ULg

Conference (2011, April)

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See detailThe role of surfactins in plant immunization by Bacilli
Cawoy, Hélène ULg; Henry, Guillaume ULg; Jourdan, Emmanuel ULg et al

Conference (2011, April)

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See detailSoft Capture
Agrell, Per; Gautier, Axel ULg

Conference (2011, April)

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See detailAssessment of the long term changes of the SES ecosystem
Grégoire, Marilaure ULg

Conference (2011, April)

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See detail21st century high-resolution downscaling of the Antarctic surface mass balance from global circulation models
Agosta, Cécile ULg; Favier, Vincent; Genthon, Christophe et al

Conference (2011, April)

Most of the IPCC-AR4 Atmospheric Global Circulation Models (AGCM) predict an increase of the Antarctic Surface Mass Balance (SMB) during the 21st century that would mitigate global sea level rise. Present ... [more ▼]

Most of the IPCC-AR4 Atmospheric Global Circulation Models (AGCM) predict an increase of the Antarctic Surface Mass Balance (SMB) during the 21st century that would mitigate global sea level rise. Present accumulation and predicted change are largest at the ice sheet margins because they are driven by snowfall, which mostly comes from warm, moist air arising over the land slopes. The coastal belt is also where complex processes of sublimation, melt and redistribution by the wind occur. Thus, high-resolution modelling (5 to 10 km) is necessary to adequately capture the effects of small-scale variations in topography on the atmospheric variables in this area, but limitations in computing resources prevent such resolution at the scale of Antarctica in full climate models. We present here a downscaling method leading to 10-km SMB resolution for century time-scales over Antarctica. We compute the effect of the fine topography on orographic precipitation and on boundary layer processes that lead to melt and sublimation. We show that the accumulation downscaled from ERA-Interim is in good agreement with field measurements for the last 40 years. We then display the SMB downscaled from LMDZ4 AGCM outputs (~60-km resolution), and show that the downscaling improves the agreement between present modelled and observed SMB. Finally, we present hi-resolution features of the Antarctic SMB evolution during the 21st century downscaled from LMDZ4 and discuss the effect of the resolution on the Antarctic SMB contribution to sea level change. The downscaling model is a powerful tool that will be applied to others climate models for a better assessment of future sea level rise. [less ▲]

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See detailDirectional and non-directional risk exposures in Hedge Fund returns
Lambert, Marie ULg; Hübner, Georges ULg; Papageorgiou, Nicolas

Conference (2011, April)

Detailed reference viewed: 62 (2 ULg)
See detailEnvisioning the future city through the interpretation of the ‘geographic stage’: Richard Kauffmann’s ‘possibilist’ schemes for Afula (1923-1925) and the Haifa Bay (1925-1926)
Fisher, Axel ULg

Conference (2011, April)

In mid-1920s British Mandate Palestine, the German-born Jewish architect and planner, Richard Kauffmann (1887-1958), prepared a town planning scheme for Afula and a ‘preliminary regional development ... [more ▼]

In mid-1920s British Mandate Palestine, the German-born Jewish architect and planner, Richard Kauffmann (1887-1958), prepared a town planning scheme for Afula and a ‘preliminary regional development scheme for the Haifa Bay’. The topical relevance of these two experiments stands in the original relations they attempted to establish with the physical environment and the ‘geographic stage’ at a national scale. The chosen location for the foundation of the new town of Afula as an ‘intermediate agro-city’ was the barycentre of the Jezreel Valley, ‘cradle of the agricultural Communities’ and ‘core of the Jewish State’ (Koestler, 1946). Haifa, instead, was to be implemented into a major port city aimed to compete with Beirut on the international scene as the new ‘gateway to the East’, enhancing its local natural resources and features. Both schemes gain further consistency when considered within the wider frame of Zionist settlement strategy in British Mandate Palestine, especially along the Jezreel Valley, where Kauffmann also planned many agricultural settlements. Together, Kauffmann's 1920s’ projects form an early pre-State regional planning scheme. If this first comprehensive expression of the Zionist Nation-Space naïvely neglected the presence of the Arab Other, it did not entail yet the later obsession of Zionist and Israeli planning with military-led territorial conquest. Instead, the dominant theme of this early Zionist vision of the future Nation’s geographical horizon was the building of a new collective identity grounded in agriculture and the reinterpretation of local geographic possibilities: the development of an ‘ancient-modern’ transcontinental route between the Mediterranean and the Middle East. Widely overshadowed by both the official dominant Israeli architectural history and by the emerging critique, this experiment could instead open up to an alternative narrative of Zionist modern architecture and planning and usefully question present-day architectural and planning practice’s 'lost of the centre'. [less ▲]

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See detailFANTOM Project Overview
Georges, Marc ULg

Conference (2011, March 31)

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See detailPrison et traitement médiatique
Seron, Vincent ULg

Conference (2011, March 31)

Detailed reference viewed: 33 (5 ULg)
See detailMass spectrometry applied to biomolecules analysis
Far, Johann ULg; Mazzucchelli, Gabriel ULg; Meuwis, Marie-Alice ULg et al

Conference (2011, March 31)

Detailed reference viewed: 35 (6 ULg)
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See detailBuilding Design and Classroom Acoustics
Amarante Andrade, Pedro; Morsomme, Dominique ULg; Epstein, Ruth

Conference (2011, March 29)

Teachers and students suffer from the impact of noisy classrooms. This is due to poor sound isolation, traffic and noise generated by electronic data processors, HVAC (Heating, Ventilation and Air ... [more ▼]

Teachers and students suffer from the impact of noisy classrooms. This is due to poor sound isolation, traffic and noise generated by electronic data processors, HVAC (Heating, Ventilation and Air Conditioning) interference and reverberation levels. For teachers, this resulted in increased vocal loading and fatigue, frequently leading to vocal issues. Furthermore, poor acoustic conditions influence children language acquisition process, sometimes leading to impaired concentration, behavioural disorders, and attention deficit. The problem is more enhanced in children with hearing impairment (temporary or permanent) or with other disabilities. Lack of information and normative data on the aspects of building design and classroom acoustics have prompted this review, which comprises of sources originated from Canada, France and Belgium. [less ▲]

Detailed reference viewed: 472 (19 ULg)
See detailFunctional Foods: Spaces of Innovation and the Materiality of Scientific Universality
Hendrickx, Kim ULg

Conference (2011, March 29)

Throughout human history, different authorities have prescribed what to eat and what foodstuffs to avoid. This paper looks at one particular authority that has gained considerable influence in the past ... [more ▼]

Throughout human history, different authorities have prescribed what to eat and what foodstuffs to avoid. This paper looks at one particular authority that has gained considerable influence in the past two decades: nutrition science. Our aim is to render a subfield of nutrition science called ‘functional food science’ ethnographically analyzable, in order to add more precision to the common statement that the ‘findings’ of ‘scientists’ have become recognized by ‘the European Authorities’. Which actors are involved, what are the actors’ respective playing fields, and how are these fields related? The paper is divided in a descriptive part, and a discussion section. In the descriptive part, we propose a brief genealogy of functional food science and the construction of a new scientific gaze on food. The genealogy enables us to distinguish a series of actors, choices, and locally rooted practices in a story that is qualitatively different from accounts in terms of scientific universality. The discussion section at the end of this paper proposes further venues for anthropological research into the relations between science, health and power in a competitive economic and political order. These research questions problematize the meaning and substance of ‘innovation’. [less ▲]

Detailed reference viewed: 55 (19 ULg)
Peer Reviewed
See detailThe Vocal Impact of a Prolonged Reading Task at two Intensity Levels
Remacle, Angélique ULg; FINCK, Camille ULg; Roche Anne et al

Conference (2011, March 29)

The purpose of this study is to evaluate the impact on voice of both duration and intensity level of 2 hours of continuous oral reading. Fifty normophonic women (mean age: 25.4 years) undergo two sessions ... [more ▼]

The purpose of this study is to evaluate the impact on voice of both duration and intensity level of 2 hours of continuous oral reading. Fifty normophonic women (mean age: 25.4 years) undergo two sessions of voice loading in which the required intensity level of voice varied: 60-65 dB(A) for the first session, and 70-75 dB(A) for the second session. The results of loading are assessed with regard to objective data and self-rating of voice obtained every 30 minutes during the oral reading tasks. Serial voice quality objective data is obtained by use of Multi-Dimensional Voice program (Average fundamental frequency (AvF0), Jitter percent (Jitt), Shimmer percent (Shim), Noise-to-Harmonic Ratio (NHR)). Serial measurements of maximum phonation time (MPT) and voice range are carried out by use of Kay Elemetrics Computerized Speech Lab. The following characteristics are also categorized by the use of a 100 mm visual analogue scale every 30 minutes of the oral reading tasks: voice quality, feeling of phonation effort, vocal fatigue, and laryngeal discomfort. Results indicate that AvF0, lowest frequency of voice range, softest output of phonation, feeling of phonation effort, vocal fatigue and laryngeal discomfort rise during prolonged oral reading. On the contrary, Shim and self-rating of voice quality decrease significantly with the passage of time during the voice loading. Jitt and NHR tend to decrease. MPT decreases after the first 30 minutes but increases afterwards. AvF0 and highest frequency of voice range are the only parameters influenced by the required intensity of oral reading task: these values are significantly higher in the 70-75 dB session compared to the 60-65 dB session. [less ▲]

Detailed reference viewed: 39 (13 ULg)
See detailLa liberté religieuse, le financement des cultes et la Constitution belge
Behrendt, Christian ULg

Conference (2011, March 28)

Detailed reference viewed: 70 (37 ULg)
See detailLe financement public des communautés convictionnelles aujourd’hui. Qui reçoit quoi ? Comment ? Et pourquoi ?
Husson, Jean-François ULg

Conference (2011, March 28)

This papers details all channels of public financing for religious and philosophical communities in Belgium. It provides estimates of these transfers but seeks mainly to identify their political ... [more ▼]

This papers details all channels of public financing for religious and philosophical communities in Belgium. It provides estimates of these transfers but seeks mainly to identify their political justifications (social cohesion, inter-faiths dialogue, intra-faith dialogue,...). [less ▲]

Detailed reference viewed: 31 (1 ULg)
See detailQuestions autour d’un impôt philosophiquement dédicacé
Husson, Jean-François ULg

Conference (2011, March 28)

Detailed reference viewed: 27 (0 ULg)
See detailLes dimensions spectaculaires du catholicisme baroque : bilan et perspectives
Delfosse, Annick ULg

Conference (2011, March 28)

Detailed reference viewed: 75 (17 ULg)
Peer Reviewed
See detailIs paralysing lumbar disc herniation a surgical emergency ?
DUBUISSON, Annie ULg; BORLON, Sarah ULg; NGUYEN KHAC, Minh-Tuan ULg et al

Conference (2011, March 26)

Detailed reference viewed: 69 (8 ULg)