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See detailL'identité à travers l'espace et le temps. Vers une définition de l’identité et des relations spatio-temporelles entre objets géographiques.
Hallot, Pierre ULg

Doctoral thesis (2012)

The principal goal of this research is to model object’s evolution in space and time; it implies questioning identity, space and time. First, we define the concept of object spatio-temporal state. This ... [more ▼]

The principal goal of this research is to model object’s evolution in space and time; it implies questioning identity, space and time. First, we define the concept of object spatio-temporal state. This concept allows modelling object identity evolution. Indeed, managing object identity must not be related to the object spatiality. In other words, we assume that the existence of an object is not dependant of its spatial extension. We show that there exist a lot of relationships associated to objects which does not yet exist or which does not exist anymore. We show also that when objects are not visible during an interval of time, it does not imply the lost of their identity. The model we propose aims at providing a framework for non-existent and non-visible objects Then, we study the spatio-temporal interactions between objects. The proposed solution is to define relationships between objects spatio-temporal states. It appears that the proposed set of relationships is a generalized vision of existing spatio-temporal reasoning models. Knowing that space-time continuity is not preserved in qualitative modelling, we apply the dominance theory which aims at retrieving continuous transitions between qualitative states. This development provides formal definitions of possible transition between spatio-temporal states relationships. Logically, the next step is to study the possible evolution of these spatio-temporal states relationships. This leads to the development of a formal model called “life and motion configurations”. This iconic representation gives a simplified view of the spatio-temporal evolution between two objects. It can be used to formalize the relationship between two spatio-temporal histories. In this work, we prove that this language is sufficient to provide spatio-temporal knowledge on moving objects. It determines also a framework in which others spatio-temporal reasoning models can be classified. Based on life and motion configurations, we propose two applications. Firstly, the life and motion configurations are generalised into a set of 25 relationships representing spatio-temporal information with a high level of abstraction. We believe that this set is close to people perception of spatio-temporal information. Secondly, two natural language interpretations of life and motion configurations are proposed; one applied to generalized spatio-temporal relationships, one applied to spatio-temporal predicates used in common French language. [less ▲]

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See detailWATER-BORNE EMERGING ZOONOSE? CASE REPORT ON ERYSIPELAS (ERYSIPELOTHRIX RHUSIOPATHIAE) IN HARBOUR PORPOISES (PHOCOENA PHOCOENA) AND HARBOUR SEAL (PHOCA VITULINA).
Boseret, Géraldine ULg; Saegerman, Claude ULg; Mainil, Jacques ULg et al

Poster (2012, March 26)

An adult female harbour porpoise (Phocoena phocoena) and a juvenile male harbour seal (Phoca vitulina) have been found stranded dead on the Belgian coast in late 2001. As the two bodies were in good ... [more ▼]

An adult female harbour porpoise (Phocoena phocoena) and a juvenile male harbour seal (Phoca vitulina) have been found stranded dead on the Belgian coast in late 2001. As the two bodies were in good condition (CC = 2), necropsy and bacteriological analyses were performed as well as other postmortem investigations. Blood heart and organs (liver, digestive and respiratory tract, lungs, spleen, brain, kidneys) samples have been collected and analyzed. The porpoise showed evidence of septicaemia, and the seal presented lesions of acute enteritis. Pure and abundant growth of a small rod-shaped, Gram-labile bacterium was obtained aerobically and anaerobically on Columbia blood agar from heart blood, mouth, pharynx, lungs, intestine and anus of the porpoise, and from intestine, pharynx, mouth, nose and anus of the seal. The colonies were surrounded by a narrow zone of alpha-hemolysis. Catalase- and peroxydase-tests gave negative results. Rapid ID 32 Strepto (Biomérieux, France) sugar tests identified this isolate as Erysipelothrix rhusiopathiae. E. rhusiopathiae could be therefore considered as the cause of septicaemia on the porpoise as it was present in heart blood and internal organs, and could be associated primary or secondary with the enteritis reported on the seal as the bacterium was isolated in pure culture in the digestive tract. E. rhusiopathiae infections have been reported in captive dolphins and sea lions. This zoonotic pathogen is also involved in human local infections, like the “seal finger”, resulting from captive pinnipeds bites. However, it has not been so far described as systemic pathogens of wild cetaceans and pinnipeds. E. rhusiopathiae could be therefore considered as a potentially emergent pathogen which could have important repercussions on human health, particularly veterinarians, marine mammals rescue teams and zoos. [less ▲]

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See detailRecognition of emotions in facial images
Pierard, Sébastien ULg; Lejeune, Antoine ULg; Van Droogenbroeck, Marc ULg

Report (2012)

This document reports about some work done in the field of emotions classification in facial images.

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See detailImpact of the alkyl chain carbon atom number of uronic acid-derivative surfactants on interfacial and colloidal systems
Razafindralambo, Hary ULg; Richard, Gaetan ULg; Laurent, Pascal ULg et al

Poster (2012, March 26)

Uronic acid-derivative surfactants represent today an attractive group of Carbohydrate-based amphiphilic compounds for both fundamental and practical reasons [1,2]. In the continuity of our screening of ... [more ▼]

Uronic acid-derivative surfactants represent today an attractive group of Carbohydrate-based amphiphilic compounds for both fundamental and practical reasons [1,2]. In the continuity of our screening of their basic properties, and the approach in establishing relationships between their structure and properties [3,4], the impact of the alkyl chain carbon atom number on interfacial and colloidal systems has been systematically investigated. In this communication, the effect of odd-even number of carbon atom from C11 to C18, and the particular behavior of long chain derivatives on interfacial properties, as well as their impact on the formation and stability of colloidal systems, are presented. Experimental approaches have been conducted by investigating their properties and behaviors at gas-liquid and liquid-liquid under dynamic, equilibrium, and oscillatory interfacial conditions. Results are completed by and discussed with single molecule models established by theoretical approaches. [1] Razafindralambo, H.;Blecker, C.; Paquot, M., Screening of Basic Properties of Amphiphilic Molecular Structures for Colloidal System Formation and Stability. In Amphiphiles: Molecular Assembly and Applications, American Chemical Society: 2011; Vol. 1070, pp 53-66. [2] Laurent, P.; Razafindralambo, H.; Wathelet, B.; Blecker, C.; Wathelet, J.; Paquot, M., Synthesis and Surface-Active Properties of Uronic Amide Derivatives, Surfactants from Renewable Organic Raw Materials. J. Surfactants Deterg. 2011, 14, 51-63. [3] Razafindralambo, H.; Richel, A.; Wathelet, B.; Blecker, C.; Wathelet, J.; Brasseur, R.; Lins, L.; Miñones, J.; Paquot, M., Monolayer properties of uronic acid bicatenary derivatives at the air-water interface: effect of hydroxyl group stereochemistry evidenced by experimental and computational approaches. Physical chemistry chemical physics: PCCP 2011, 13 15291-15298. [4] Razafindralambo, H.; Blecker, C.; Mezdour, S.; Deroanne, C.; Crowet, J.; Brasseur,R.; Lins, L.; Paquot, M., Impacts of the Carbonyl Group Location of Ester Bond on Interfacial Properties of Sugar-Based Surfactants: Experimental and Computational Evidences. The journal of physical chemistry. B 2009, 113, 8872-8877. [less ▲]

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See detailMicrostructure characterisation of nanocomposite polymeric foams by X-ray microtomography
Plougonven, Erwan ULg; Detrembleur, Christophe ULg; Tran, Minh Phuong ULg et al

Poster (2012, March 26)

Recent advances in microstructured materials have given rise to many new types of composites that exhibit original and interesting physical properties. For example, a nanocomposite made of carbon ... [more ▼]

Recent advances in microstructured materials have given rise to many new types of composites that exhibit original and interesting physical properties. For example, a nanocomposite made of carbon nanotubes inside a polymer matrix shows exceptional electromagnetic interference shielding effectiveness when foamed. However, the effective properties of such materials strongly depend on the shape and topology of the microstructural cells. An accurate method for investigating the cellular microstructure is X-ray microtomography (XRμT), for it is non-destructive, and it provides 3D geometric information. Although it cannot be used to observe nanofiller dispersion, it has a strong potential for cell structure characterisation. In order to reduce the need for trial and error in tailoring these materials, our objective is to quantify, using XRμT, cellular microstructure, for two different types of foaming procedures, namely supercritical CO2 batch foaming and freeze drying, to be able to establish a link between the structure and its shielding effectiveness. The main difficulty stems from the type of material being studied: it is light, therefore hardly absorbs X-rays, cell size is small compared to the resolution capacity of the tomograph, and cell wall thickness is extremely thin in some cases, making them very hard to discern in the images. For these reasons, common image analysis tools for identifying and delimiting objects in an image prove impractical. We propose an original method that uses the 3D autocorrelation function of the tomograms to determine statistical information from these images, such as average cell size and anisotropy, without the need to binarise and segment the images. [less ▲]

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See detailPreparation of drug-loaded scaffolds for biomedical applications using supercritical carbon dioxide technology
Champeau, Mathilde; Jérôme, Christine ULg; Tassaing, Thierry

Conference (2012, March 25)

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See detailLa famille à l'épreuve des sociétés
Gavray, Claire ULg

Conference given outside the academic context (2012)

démonter les idées reçues sur les évolutions de la famille. Discuter les enjeux sociétés de la mise sous pression des familles

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See detailEpaisseur d’images : profondeurs paradoxales. Sur "Long Live The New Flesh » de Nicolas Provost
Thonon, Jonathan ULg

in Cinéma: immersivité, surface, exposition (2012, March 25)

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See detailRelationships between structure-interfacial-functional properties: The rheology at interfaces from small to polymeric carbohydrate-based surfactants
Razafindralambo, Hary ULg

Conference (2012, March 25)

Amphiphilc molecules are one of the most important compounds in our planet owing to their fundamental role as catalysts of interfacial free energy in nature, biological systems, and manufacturated ... [more ▼]

Amphiphilc molecules are one of the most important compounds in our planet owing to their fundamental role as catalysts of interfacial free energy in nature, biological systems, and manufacturated products [1]. Their chemical structure and configuration, which governs their properties and activities, may be classified in small, intermediate, and large sizes. To better understand the effect of such a parameter, the behaviors of various carbohydrate-based surfactants, from small to polymeric molecular structures at the air-water interface, and in bulk liquid for their ability to form and stabilize related colloidal systems like micelles and foams have been investigated. In particular, rheological properties including elasticity and viscosity components at the air-water interface have been determined by oscillatiory mode under different oscillation frequency and surfactant concentration conditions using a pending drop tensiometer system. Their micellar and foaming properties have been characterized and evaluated in terms of CMC-micelle size and formation-stability, respectively. Reference: [1] Razafindralambo, H.; Blecker, C.; Paquot, M., Screening of Basic Properties of Amphiphilic Molecular Structures for Colloidal System Formation and Stability. In Amphiphiles: Molecular Assembly and Applications, Ed. R. Nagarajan, American Chemical Society: 2011;. Vol. 1070, pp 53-66. [less ▲]

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See detail"L'acteur et le badaud. Sur deux corps de cinéma (années 1900)"
Belloi, Livio ULg

Conference (2012, March 24)

Le cinématographe – c’est une évidence – n’est pas né avec la notion d’acteur. L’acteur de cinéma est une instance qui s’est inventée progressivement, au registre de l’Histoire. Dans le cadre de cette ... [more ▼]

Le cinématographe – c’est une évidence – n’est pas né avec la notion d’acteur. L’acteur de cinéma est une instance qui s’est inventée progressivement, au registre de l’Histoire. Dans le cadre de cette communication, j'examine quelques-unes des modalités d’émergence de cette figure singulière. Dans le premier cinéma de fiction, tel qu’il s’impose au cours des années 1900, l’acteur de cinéma, comme corps en jeu, entre virtuellement en concurrence, tout particulièrement en cas de tournage en plein air, avec celui qui fut l’homme ordinaire du cinéma des tout premiers temps, à savoir le badaud, qu’il finira évidemment par supplanter. Encore cette substitution ne s’est-elle pas opérée instantanément : elle présente, elle aussi, une dimension forcément historique. Partant de là, il s’agit d’examiner une forme de régime transitoire dans les relations mettant aux prises ces deux corps de cinéma que sont le badaud et l’acteur. Pour ce faire, l’accent est placé moins sur des films que sur des moments d’images (plans ou fragments de plan) puisés dans quelques films des années 1900, dont "Daring Daylight Burglary" (F. Mottershaw, Sheffield Photographic Company, 1903), "The Ex-Convict" (E. S. Porter, Edison, 1904) et "Mésaventures d’un cycliste myope" (Éclipse, 1907). Dans ces quelques moments d’images, la coprésence du badaud et de l’acteur témoigne d’un état hybride ou clivé de la scène de cinéma : un état dans lequel l’acteur, institué en foyer d’attention, n’est pourtant pas encore mis en situation de monopoliser l’espace de la représentation ; un état dans lequel il doit composer avec la présence incidente du badaud, lequel incarne exemplairement la part d’hétérogène qu’enferme, à ses origines, la scène de cinéma. [less ▲]

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See detailMass spectrometry and ion mobility spectrometry of G-quadruplexes. A study of solvent effects on dimer formation and structural transitions in the telomeric DNA sequence d(TAGGGTTAGGGT).
Ferreira, Ruben; Marchand, Adrien; Gabelica, Valérie ULg

in Methods (2012), 57(1), 56-63

We survey here state of the art mass spectrometry methodologies for investigating G-quadruplexes, and will illustrate them with a new study on a simple model system: the dimeric G-quadruplex of the 12-mer ... [more ▼]

We survey here state of the art mass spectrometry methodologies for investigating G-quadruplexes, and will illustrate them with a new study on a simple model system: the dimeric G-quadruplex of the 12-mer telomeric DNA sequence d(TAGGGTTAGGGT), which can adopt either a parallel or an antiparallel structure. We will discuss the solution conditions compatible with electrospray ionisation, the quantification of complexes using ESI-MS, the interpretation of ammonium ion preservation in the complexes in the gas phase, and the use of ion mobility spectrometry to resolve ambiguities regarding the strand stoichiometry, or separate and characterise different structural isomers. We also describe that adding electrospray-compatible organic co-solvents (methanol, ethanol, isopropanol or acetonitrile) to aqueous ammonium acetate increases the stability and rate of formation of dimeric G-quadruplexes, and causes structural transitions to parallel structures. Structural changes were probed by circular dichroism and ion mobility spectrometry, and the excellent correlation between the two techniques validates the use of ion mobility to investigate G-quadruplex folding. We also demonstrate that parallel G-quadruplex structures are easier to preserve in the gas phase than antiparallel structures. [less ▲]

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See detailThe treatment of hypersexuality by cognitive behavioral therapy and virtual therapy
Cismaru, Adina; Andrianne, Robert ULg; Triffaux, Jean-Marc ULg

Poster (2012, March 24)

The sexual addiction is an abnormal sexual practice. It becomes the center of the subject’s existence, by depriving him from other investments and without bringing him real satisfaction. This research ... [more ▼]

The sexual addiction is an abnormal sexual practice. It becomes the center of the subject’s existence, by depriving him from other investments and without bringing him real satisfaction. This research project intends to explore the field of sexual addiction and a possible treatment for it. Several studies on sexual dysfunction treated with psychotherapy and virtual reality have shown that we obtain better results than if we use just the psychotherapy. [less ▲]

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See detailNew design antenna Gsm900/1800/Umts for sensor networks on High voltage line
Adegbola, Kayode Romaric Adebiyi ULg; Hajraoui

in Congrès méditerranéen des Télécommunications: CMT, Fès 22-24 Mars 2012 (2012, March 24)

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See detailFamilial Isolated Pituitary Adenomas
Beckers, Albert ULg

Scientific conference (2012, March 24)

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See detailAntidepressant use and fracture risk: a meta-analysis
Bruyère, Olivier ULg

Conference (2012, March 24)

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See detailLes parlementaires québecois et wallons
Dodeigne, Jérémy ULg

Conference (2012, March 23)

Detailed reference viewed: 44 (6 ULg)