Heisenberg-limited metrology without entanglement

Conference (2012, March)

Digital Holography at Long-Wave Infrared for Measuring the Deformation of Large Space Reflectors under Thermal Vacuum

Conference (2012, March)

Measurement of Trace Level Dechlorane Flame Retardants in Human Blood by GCXGC-NCI-HRTOFMS

Conference (2012, March)

Anisotropy preserving interpolation of diffusion tensors

Conference (2012, March)

Structure cordale, phonotraumatisme et lésions cordales

Conference (2012, March)

A level set approach for the optimal design of flexible components in multibody systems

Conference (2012, February 29)

Le droit électoral en Allemagne, en Belgique et au Royaume-Uni : présentation des travaux de recherche

Conference (2012, February 24)

La communication présente l'état d'une recherche en droit électoral comparé (Allemagne, Belgique, Royaume-Uni) et aborde la question du rôle du droit sur la répartition de l'influence électorale entre les ... [more ▼]

La communication présente l'état d'une recherche en droit électoral comparé (Allemagne, Belgique, Royaume-Uni) et aborde la question du rôle du droit sur la répartition de l'influence électorale entre les gouvernés. [less ▲]

Questions à Camille Riquier

Conference (2012, February 23)

Intervention dans la table-ronde autour du livre de Camille Riquier, "Archéologie de Bergson".

DYSPHAGIE, DEGLUTITION ET ALIMENTATION

Conference (2012, February 16)

Auto-immunité en thyroïdologie et en gastro-entérologie

Conference (2012, February 16)

Future projections of the Greenland ice sheet climate simulated by the regional climate model MAR forced by 2 CMIP5 global models.

Conference (2012, February 14)

As part of the ICE2SEA project, the regional climate model MAR was forced by the global models HadCM3 and ECHAM5 for making future projections of the Greenland Ice Sheet (GrIS) Surface Mass Balance (SMB ... [more ▼]

As part of the ICE2SEA project, the regional climate model MAR was forced by the global models HadCM3 and ECHAM5 for making future projections of the Greenland Ice Sheet (GrIS) Surface Mass Balance (SMB) over 1980-2099 at a resolution of 25km. However, the comparison with MAR forced by the ERA-40 reanalysis over 1980-1999 shows that MAR forced by these GCMs is not able to represent reliably the current SMB due to biases in the general circulation and in the free atmosphere summer temperature modelled by these GCMs around the GrIS. That is why, we present here first results of MAR forced by the next generation of GCMs from the CMIP5 data base (CanESM2 and NorESM1 here). The comparison with the ERA-40 forced MAR simulations over current climate is a lot of better, which increases the reliability and the interest of these new MAR projections. In addition, the new scenarios (RCP 2.6, 4.5, 6.0 and 8.5) of the next IPCC Assessment Report (AR5) are used here. These new simulations show notably that the response of SMB to rising temperature is not a linear function of the temperature anomalies due to the positive albedo feedback which accelerates the surface melt. For 2100, in case of extreme rising temperature (RCP 8.5 scenario), MAR simulates a surface GrIS mass loss corresponding to a cumulated sea level rise of about 15 cm since 2000! Mainly the changes in SMB and in surface energy balance will be discussed here. [less ▲]

Future projections of the Greenland ice sheet climate simulated by the regional climate model MAR forced by 2 CMIP5 global models.

Conference (2012, February 12)

As part of the ICE2SEA project, the regional climate model MAR was forced by the global models HadCM3 and ECHAM5 for making future projections of the Greenland Ice Sheet (GrIS) Surface Mass Balance (SMB ... [more ▼]

As part of the ICE2SEA project, the regional climate model MAR was forced by the global models HadCM3 and ECHAM5 for making future projections of the Greenland Ice Sheet (GrIS) Surface Mass Balance (SMB) over 1980-2099 at a resolution of 25km. However, the comparison with MAR forced by the ERA-40 reanalysis over 1980-1999 shows that MAR forced by these GCMs is not able to represent reliably the current SMB due to biases in the general circulation and in the free atmosphere summer temperature modelled by these GCMs around the GrIS. That is why, we present here first results of MAR forced by the next generation of GCMs from the CMIP5 data base (CanESM2 and NorESM1 here). The comparison with the ERA-40 forced MAR simulations over current climate is a lot of better, which increases the reliability and the interest of these new MAR projections. In addition, the new scenarios (RCP 2.6, 4.5, 6.0 and 8.5) of the next IPCC Assessment Report (AR5) are used here. These new simulations show notably that the response of SMB to rising temperature is not a linear function of the temperature anomalies due to the positive albedo feedback which accelerates the surface melt. For 2100, in case of extreme rising temperature (RCP 8.5 scenario), MAR simulates a surface GrIS mass loss corresponding to a cumulated sea level rise of about 15 cm since 2000! Mainly the changes in SMB and in surface energy balance will be discussed here. [less ▲]

Hypertension réfractaire : diagnostic et prise en charge

Conference (2012, February 11)

Barrett's metaplasia, dysplasia and esophageal ademnocarcinoma: an inadequate antitumour immunity?

Conference (2012, February 09)

50 Years of contrasted residue management in an agricultural crop: Impacts on the soil carbon budget and on soil heterotrophic respiration.

Conference (2012, February 08)

Within the context of Climate Change, crop management exerts a strong influence on the soil carbon (C) balance. This study aims (1) to estimate the C loss by soil heterotrophic respiration (SHR) in ... [more ▼]

Within the context of Climate Change, crop management exerts a strong influence on the soil carbon (C) balance. This study aims (1) to estimate the C loss by soil heterotrophic respiration (SHR) in different residue management treatments through the establishment of their soil C budgets and (2) to compare these estimations with field SHR measurements. Three contrasted treatments were considered: Residue Export (RE), Farm Yard Manure addition (FYM) and Residue Restitution after harvest (RR). They were established in 1959 and continuously applied since then at an experimental field located in the Hesbaye region in Belgium. The soil C budget was calculated for each treatment on the basis of total soil organic C content measurements and C input data compiled since the beginning of the experiment. This allowed estimating the C loss by SHR in the different treatments. SHR measurements were performed in 2010 and 2011 to compare them with the budget-based estimations and to assess SHR sensitivity to temperature in the different treatments. The soil C budgets showed that the soil under the RR treatment was likely to undergo the largest C loss by SHR since the beginning of the experiment. The comparison between the results from the C budget and the SHR field measurements, performed 50 years after the experiment had begun, did however show that the treatment that received the largest amount of crop residues (RR) did not necessarily sequestrate the most C or produce the largest CO2 fluxes (FYM). Besides, no significant difference between treatments was observed in the field measurements in terms of SHR sensitivity to temperature. Laboratory investigations (microbial biomass, basal respiration, metabolic diversity and soil fractionation) will later be performed to better understand the effects of long-term residue management on soil C dynamics. [less ▲]

Life cycle assessment: a bridge between environmental sciences and bio(chemical) engineering

Conference (2012, February 08)

migrations congolaises en Belgique et géographies religieuses

Conference (2012, February 08)

γδ T cells could promote cancer progression of HPV-induced lesions

Conference (2012, February 04)

"Bilingual today, French Tomorrow. Qui a peur du français sur les affiches?"

Conference (2012, February 03)

Incorporation of prior information in the regularized inversion of ERT data with CRTomo

Conference (2012, February 03)

The electrical resistivity tomography (ERT) inverse problem is ill-posed leading to non-uniqueness of its solution. A possible way to reduce the amount of mathematical solutions to more geologically ... [more ▼]

The electrical resistivity tomography (ERT) inverse problem is ill-posed leading to non-uniqueness of its solution. A possible way to reduce the amount of mathematical solutions to more geologically plausible models is to incorporate priori information in the inversion process. In this presentation, we describe the implementation of three different techniques ways to go beyond standard Occam’s inversion for ERT with the code CRTomo : a simple reference model weighted by a user-defined parameter, a structural constraint defined by modifying the construction of the roughness matrix compared to standard Occam’s inversion and a geostatistical constraint based on a vertical correlation length deduced from borehole data to build the model covariance matrix and use it to regularize the inversion. With several examples, we show that the traditional smoothness constraint yield small contrasts of resistivity, far from the reality revealed by borehole measurements. Incorporating prior information from boreholes clearly or from another geophysical technique (like GPR or seismic refraction) improves the misfit with logging data. The choice of the prior information incorporation technique highly depends on which king of information is available and further developments are needed to extend the techniques to more complex cases. [less ▲]

Three dimensional Bin Packing Problem applied to air transport

Conference (2012, February 02)

Packing boxes into containers is a daily process in many di erent elds and especially in transport. However, the particular case of air transport brings some new constraints such as the stability or the ... [more ▼]

Packing boxes into containers is a daily process in many di erent elds and especially in transport. However, the particular case of air transport brings some new constraints such as the stability or the fragility of the cargo. The distribution of the weight has also to be considered. Moreover, this special case also brings some data such as the dimensions of the possible containers, called Unit Load Devices. This paper is concerned with the formulation of the three dimensional palletization which includes the main constraints met in the air cargo industry. It proposes a integer linear program for this combinatorial optimization problem. [less ▲]

« ... dass wir ihn nicht mehr sehen würden »: Absence et représentation d'un combattant armé (Farocki, Conradt, Sami)

Conference (2012, February 02)

La plupart des documentaires réalisés sur ou dans l’entourage de groupes terroristes d’extrême gauche allemand dans les années septante fondent leur approche sur une confusion délibérée entre militance et ... [more ▼]

La plupart des documentaires réalisés sur ou dans l’entourage de groupes terroristes d’extrême gauche allemand dans les années septante fondent leur approche sur une confusion délibérée entre militance et contrinformation. Ces films relayent et adaptent une conception, critiquée dès 1969 par Harun Farocki (Nicht löschbares Feuer), d’un outil audiovisuel strictement fonctionnel tel que le défend Holger Meins notamment : « Car le travail cinématographique socialiste doit être partie du travail politique. Et le travail cinématographique socialiste ne peut être réalisé sans la praxis du travail politique » (Meins/Lukasik/Straschek, 1968). Outre le célèbre film collectif Deutschland im Herbst (Kluge/Schlöndorff/Reitz/Fassbinder e.a., 1977), deux documentaires notamment font exception à cette tendance générale : Es stirbt allerdings ein Jeder de Renate Sami (1975) et Über Holger Meins de Gerd Conradt et Hartmut Jahn (1975-1982 ; ici dans sa version inédite et inachevée de 1978). Se focalisant tous deux sur le sort d’une figure absente, l’étudiant en cinéma Holger Meins devenu terroriste (RAF), ces films tournent le dos à une conception fonctionnelle de la pratique cinématographique défendue d’abord par certains piliers de la première promotion de la DFFB dès 1966. Ils proposent de la sorte une nouvelle approche des rapports problématiques entre militance et création, qui ne dédouble plus l’esthétique médiatique contre laquelle les vidéos et films indépendants voulaient se dresser. [less ▲]

An Integer Programming model for air transport of hazardous and special shipments

Conference (2012, February 02)

The aircraft loading problem is a real-world combinatorial optimisation problem highly constrained. This weight must be distributed to keep the centre of gravity within speci ed limits. Moreover, an ... [more ▼]

The aircraft loading problem is a real-world combinatorial optimisation problem highly constrained. This weight must be distributed to keep the centre of gravity within speci ed limits. Moreover, an aircraft has usually several cargo compart- ments with speci c contours and structural limitations such as oor loading, com- bined load limits and cumulative load limitations. Finally, some shipments are par- ticularly restrictive to transport, like dangerous goods, live animals and perishable goods. This paper is concerned with the incorporation of these latter constraints in a mixed integer linear program for the problem of loading a set of Unit Load- ing Devices and bulk into an aircraft. Experimental results show that our method achieves optimal solutions within only few seconds. [less ▲]

Educational orientation and social heritage. The choice of working-class students

Conference (2012, February 01)

Comparison of respiration-related surgical clip and chest wall movement between prone and supine position in the adjuvant radiotherapy of breast cancer

Conference (2012, February)

An association between short-term memory for order and numerical cognition in 3rd grade kindergarten children.

Conference (2012, February)

Several studies explored the relationship between verbal short-term memory (STM) and numerical cognition, but with inconclusive findings. The present study re-explored this relationship, by adopting the ... [more ▼]

Several studies explored the relationship between verbal short-term memory (STM) and numerical cognition, but with inconclusive findings. The present study re-explored this relationship, by adopting the critical distinction between STM for item information (the items to be retained) and STM for order information (the order of the items within a list). We hypothesized that especially STM for order should be related to the development of numerical abilities, given that recent studies suggest the intervention of common processes during the representation of order information in STM and numerical tasks. We investigated item and order STM abilities and numerical processing abilities in 72 children during their third year in kindergarten. We observed that order STM abilities, but not item STM abilities, correlated significantly with performance on numerical order judgment and calculation tasks. These associations remained after control of interindividual differences in verbal and non-verbal cognitive efficiency. Our results suggest a specific relationship between order STM processes and numerical cognition, opening new perspectives for our understanding of the STM determinants of numerical cognition development. [less ▲]

European project, demo “NETFLEX” For large integration of renewables using DLR, PST and PMU.

Conference (2012, February)

forecasting ampacity as a need for power system operation

Microorganisms from aphid honeydew attract natural enemies and tending ants

Conference (2012, February)

Aphids are some of the most serious pests of cultivated crops worldwide, causing major yield and economic losses. Previous works have demonstrated ants and natural enemies (including ladybeetles and ... [more ▼]

Aphids are some of the most serious pests of cultivated crops worldwide, causing major yield and economic losses. Previous works have demonstrated ants and natural enemies (including ladybeetles and hoverflies) to be able to use aphid volatile chemicals to locate aphid colonies. Here, we report the first isolation of a bacterium from the pea aphid Acyrthosiphon pisum honeydew, Staphylococcus sciuri, which produces kairomones used by the aphidophagous hoverfly Episyrphus balteatus and the Asian Ladybeetle Harmonia axyridis during their search for prey colonies. Some specific semiochemicals produced by S. sciuri were identified as attractants and ovipositional stimulants. Similarly, we have shown scouts of the aphid tending ant species, Lasius niger, to orientate their foraging behaviour toward an Aphis fabae infested plant and we have demonstrated that the odours released by this aphid honeydew were attractive for ant scouts. Again, bacteria were involved in the production of these honeydew semiochemicals. Interestingly, ant scouts were also able to discriminate honeydew odour from A. fabae (usually attended by L. niger) and A. pisum (unattendedby L. niger). Comparison of the volatile and bacteria composition of both aphid species honeydew were attended. [less ▲]

Orbital rendez-vous and formation flying of nanosatellites using differential drag

Conference (2012, January 31)

Analyse de la position en 3 dimensions : intérêts pour la posturologie

Conference (2012, January 29)

L'entreprise sociale en Asie Orientale

Conference (2012, January 27)

La ville à l'heure des contraintes énergétiques

Conference (2012, January 26)

Microstructure and mechanical properties of stir processed magnesium matrix composites reinforced with carbon fibres

Conference (2012, January 26)

Mg-Al-Zn alloys have been reinforced with carbon fibres using friction stir processing (FSP) which appears as a promising alternative for the large-scale production of C-Mg composites. The process has ... [more ▼]

Mg-Al-Zn alloys have been reinforced with carbon fibres using friction stir processing (FSP) which appears as a promising alternative for the large-scale production of C-Mg composites. The process has shown its ability to produce sound composites with enhanced strength compared to the non-reinforced alloys. The C fabric is fragmented in short fibres leading to a reduction in grain size and an improved hardness. [less ▲]

Le paysage institutionnel de l'enseignement supérieur en Belgique: l'état du projet du Ministre Marcourt à la date du colloque et les positions en présence.

Conference (2012, January 26)

Le projet de restructuration de l'enseignement supérieur impulsé à la suite de l'accord gouvernemental 2009-2014 en Communauté française de Belgique inclut à la fois une structure faîtière unique, l ... [more ▼]

Le projet de restructuration de l'enseignement supérieur impulsé à la suite de l'accord gouvernemental 2009-2014 en Communauté française de Belgique inclut à la fois une structure faîtière unique, l'Académie de Recherche et à la fois des pôles géographiques d'organisation de l'enseignement supérieur. La communication tente de décrire quelle est la stratégie ministérielle et quelles sont les réactions institutionnelles. [less ▲]

Hypertriglycéridémie et rein

Conference (2012, January 24)

The use of biomarkers in the personalized mangement of osteoarthritic patients : myth or reality

Conference (2012, January 20)

L’innovation managériale par et pour l’organisation ?

Conference (2012, January 19)

On being enrolled as an "embedded humanist" with nanotechnologists

Conference (2012, January 13)

Quels modèles de mesure pour l’évaluation des compétences ?

Conference (2012, January 12)

De plus en plus de dispositifs d’évaluation (évaluation formative, monitoring, épreuves d’orientation scolaire, …) ont recours aux Modèles de Réponse à l’Item pour estimer les compétences scolaires des ... [more ▼]

De plus en plus de dispositifs d’évaluation (évaluation formative, monitoring, épreuves d’orientation scolaire, …) ont recours aux Modèles de Réponse à l’Item pour estimer les compétences scolaires des élèves au départ de tests papier-crayon ou d’épreuves proposées sur ordinateur. Ces modèles de mesure – dont les propriétés laissaient entrevoir des progrès et des avantages considérables – se sont d’abord imposés comme standards de référence dans les enquêtes internationales pour être ensuite transposés dans des contextes locaux, notamment pour l’évaluation externe des compétences des élèves. Cependant, la technicité des MRI, leur nature stochastique et leurs composantes statistiques relativement complexes n’ont pas toujours permis une approche cartésienne et prudente de leur exploitation. On a cru pendant longtemps que la transposition de ces modèles à l’évaluation des compétences était naturelle et ne souffrait d’aucun obstacle fondamental. Mais les objectifs, les caractéristiques et les exigences de l’évaluation des compétences sont parfois bien éloignés des préoccupations internationales. Nous nous proposons donc, au départ des résultats empiriques et/ou des réflexions théoriques des intervenants de la table ronde, de déterminer dans quelles conditions l’application des MRI à l’évaluation des compétences est pertinente? Dans cette perspective, plusieurs critères d’analyse seront envisagés : la nature théorique des modèles (les MRI sont-ils adaptés pour atteindre les objectifs des dispositifs d’évaluation des compétences?), les caractéristiques psychométriques des évaluations (les conditions d’application des MRI sont-elles toujours remplies dans le cadre des évaluations de compétences?) et les méthodes de validation des modèles (les méthodes pour évaluer l’adéquation des modèles sont-elles adaptées à l’évaluation des compétences?). Pour ne pas conclure, les intervenants s’interrogeront sur l’opportunité de développer de nouveaux modèles de mesure pour l’évaluation des compétences. Trois questions principales structureront les échanges : Question 1: Quelles sont les caractéristiques psychométriques des dispositifs d’évaluation des compétences ? Question 2: Les Modèles de Réponse à l’Item sont-ils adaptés pour évaluer les compétences ? Question 3: Est-il opportun de développer de nouveaux modèles pour l’évaluation des compétences ? Si oui, quelles devraient en être les caractéristiques ? [less ▲]

Conclusions de la journée d'étude "Socialisation et création littéraire"

Conference (2012, January 12)

gender issues in ISRD survey

Conference (2012, January 11)

L’État burkinabè, le “droit à l'éducation” et les enfants au travail

Conference (2012, January 05)

« L’enseignement de base est obligatoire pour tous les enfants de six ans à seize ans », ainsi stipule l’article 4 de la Loi d’Orientation de l’Éducation au Burkina Faso. Dans cette communication, nous ... [more ▼]

« L’enseignement de base est obligatoire pour tous les enfants de six ans à seize ans », ainsi stipule l’article 4 de la Loi d’Orientation de l’Éducation au Burkina Faso. Dans cette communication, nous partirons d’une expérience d’offre et de demande scolaire dans une zone rurale du centre-est du Burkina Faso. Nous verrons comment l’école, de par son fonctionnement interne et sa structuration, a transformé l’engouement en désaffection. Cette expérience rurale n’est pas isolée. Elle nous permet ensuite d’interroger le système scolaire burkinabè contemporain : ses curricula, son fonctionnement interne, sa sélection et sa finalité. Enfin, nous examinerons dans quelle mesure cette école-là peut être une alternative au “travail des enfants”, dont l’élimination semble être une priorité politique depuis une quinzaine d’années. La présente communication s’inspire d’une recherche doctorale en cours. [less ▲]

Vulnerability and risk : some reflections for a new form of safety governance

Conference (2012, January)

Study of 2-Ethanolamine degradation

Conference (2012, January)

One major drawback of the post-combustion CO2 capture using conventional amine solvents is solvent degradation, which can be due to thermal as well as oxidative mechanisms. Degradation affects the CO2 ... [more ▼]

One major drawback of the post-combustion CO2 capture using conventional amine solvents is solvent degradation, which can be due to thermal as well as oxidative mechanisms. Degradation affects the CO2 capture process since it may cause corrosion, foaming and fouling, possibly inducing a decrease of the solvent efficiency and high additional operating costs due to solvent replacement. In order to study degradation of conventional amine solvents as well as degradation of novel solvents, a degradation test rig has been built at the University of Liège in collaboration with the company Laborelec, member of the GDF SUEZ group. Since degradation generally occurs within a few months in real plant conditions, this equipment has been designed to allow the study of different degradation mechanisms under accelerated conditions, at high temperatures (up to 140°C) and high partial pressures in oxygen and CO2 (total pressure up to 20 bar with varying gas composition). An advantage of this degradation test rig is that it can be used in batch as well as in semi-batch mode with constant gas flow. High gas-liquid contact efficiency is also ensured thanks to a mechanical agitation system combined with gas bubbling. For a typical run, 300g of aqueous amine solution (30 wt % MEA in water) is introduced into the reactor and degraded during two weeks. The degraded solutions are then analysed using high pressure liquid chromatography (HPLC) for MEA quantification and gas chromatography with flame ionization detector (GC-FID) for the characterization of degradation products. The gas phase is analysed by Fourier Transform Infra Red spectroscopy. The final objective of this work is to implement the data obtained from experimental results on the degradation test rig into an existing simulation model that has been developed based on an existing pilot plant. [less ▲]

Titan airglow: FUV and EUV 2009 UVIS spectra of airglow during day, night and eclipse

Conference (2012, January)

Heisenberg-limited metrology without entanglement

Conference (2012, January)

Contribution of GC×GC-TOFMS to tobacco analysis

Conference (2012, January)

Symposium - L'évaluation de tâches complexes en mathématiques : quels outils pour un meilleur diagnostic ?

Conference (2012, January)

A first step towards a real-time predictive yield support system.

Conference (2012)

Real-time non-invasive determination of crop biomass and yield prediction are maybe among the major challenges in agriculture. But unknown future weather remains the key point of accurate yield forecast ... [more ▼]

Real-time non-invasive determination of crop biomass and yield prediction are maybe among the major challenges in agriculture. But unknown future weather remains the key point of accurate yield forecast. This paper presents the results of a preliminary study that aims to supply the unknown future by daily mean climatic data. The results show that, under the Belgian weather, this approach is relevant. Furthermore, the developed methodology appears to be a powerful diagnosis tool of the remaining yield potential under ongoing weather. [less ▲]

Structure géométrique de l’ADN

Conference (2012)

L’ADN rassemble les informations nécessaires à tout organisme vivant pour survivre et se reproduire. Ce grimoire vient de ses ancêtres et sera transmis à ses descendants sous une forme légèrement remaniée ... [more ▼]

L’ADN rassemble les informations nécessaires à tout organisme vivant pour survivre et se reproduire. Ce grimoire vient de ses ancêtres et sera transmis à ses descendants sous une forme légèrement remaniée. La géométrie intervient à plusieurs stades de ce processus. [less ▲]