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See detailFrom lectin-histochemistry to pregnancy diagnosis by lectin-ELISA: applications of lectins for the characterisation of bovine pregnancy-associated glycoprotein.
Klisch, K.; Melo de Sousa, Noelita ULg; Beckers, Jean-François ULg et al

in Proceedings of the XXVIth Congress of the European Association of Veterinary Anatomists (2006)

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See detailFrom Life to Literature. Max Frisch’s Tagebücher
Letawe, Céline ULg

in Berwald, Olaf (Ed.) A Companion to the Works of Max Frisch (2013)

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See detailFrom living to controlled aluminium alkoxide mediated ring-opening polymerization of (di)lactones, a powerful tool for the macromolecular engineering of aliphatic polyesters
Mecerreyes, David; Jérôme, Robert ULg

in Macromolecular Chemistry and Physics (1999), 200(12), 2581-2590

The aluminium alkoxide mediated ring-opening polymerization of (di)lactones offers a great versatility to the point where the main situations covered by the definition of living and controlled ... [more ▼]

The aluminium alkoxide mediated ring-opening polymerization of (di)lactones offers a great versatility to the point where the main situations covered by the definition of living and controlled polymerizations can be illustrated. Furthermore, substitution of a coordination-insertion mechanism for the traditional anionic polymerization of these monomers results in species of lower reactivity and in a kinetic control of the polyaddition reaction. This control, combined with the use of Al alkoxides of different structures and functionalities, has opened the way to the macromolecular design of a family of biocompatible and biodegradable polyesters, e.g., controlled synthesis of telechelic polymers, block and graft copolymers, and polymers of various molecular architectures. These polymers can be used as such, or as building parts of more sophisticated polymeric assemblies. [less ▲]

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See detailFrom Maniac Productions to Remote Control
Van Cauwenberge, Geneviève ULg

in Michael Laub / Remote Control Productions (1978)

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See detailFrom Manual to Model-Based Control of a Small Jet Engine
Léonard, Olivier ULg; Denis, François; Thomas, Jean-Philippe ULg et al

in Proceedings of the 19th ISABE Conference (2009, September)

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See detailFrom medical imaging to finite element simulations: a contribution to mesh generation and locking-free formulations for tetrahedra
D'Otreppe, Vinciane ULg

Doctoral thesis (2012)

Patient-specific finite element (FE) modelling is gaining more and more attention over the years because of its potential to improve clinical treatment and surgical outcomes. Thanks to patient-specific ... [more ▼]

Patient-specific finite element (FE) modelling is gaining more and more attention over the years because of its potential to improve clinical treatment and surgical outcomes. Thanks to patient-specific modelling, the design of individualised implants and prostheses, surgical pre-operative planning and simulation, and the computation of stresses and strains in a patient's organ for diagnostic purposes will become a reality in the future. This work investigates two of the most challenging tasks of patient-specific modelling: the creation of image-based finite element meshes and the development of a low-order locking-free tetrahedral element. First, a general meshing strategy for tetrahedral mesh generation from segmented 3D images is proposed. The originality of the approach is the addition of surface reconstruction algorithm to the traditional image-to-mesh pipeline. The main advantages for this are: the generation of smooth boundaries, robustness to segmentation noise, a user-defined mesh resolution and a good fidelity of the mesh boundaries with respect to the underlying image. Also, the proposed meshing strategy is capable of generating meshes of heterogeneous structures, containing several interconnected types of tissues. Applications demonstrate that the interfaces between distinct material regions are topologically correct, i.e. the connections are edge-on-edge and node-on-node. Specific mesh decimation and mesh smoothing algorithms were designed for this multi-material tetrahedral mesh generator. In a last chapter, patient-specific hexahedral meshes are created by combining the proposed surface reconstruction algorithm with a classical voxel-conversion algorithm. Second, a low-order tetrahedral element for the solution of solid mechanics problems involving nearly incompressible materials is developed. The formulation is based on F-bar methodologies and nodal-based formulations. As in nodal based formulations, nodal Jacobians are defined. These nodal quantities are then averaged over the element to define a modified elemental Jacobian, which is used to define a modified deformation gradient, F-bar, for the element. Both 2D triangular and 3D tetrahedral are proposed and they can be used for both implicit and explicit analysis. The exact stiffness terms for the tangent stiffness matrix are derived so that a quadratic convergence rate in ensured for the Newton-Raphson equilibrium iterations. Most importantly, the new element can be used regardless the material model. Benchmarking 2D and 3D numerical tests using several constitutive models indicate a substantial removing of both the volumetric and the shear locking tendency of the standard linear triangle and tetrahedron, as well as an accurate distribution of strain, stress and pressure fields. The potential of the resulting image - to - FE model procedure is demonstrated in the last part of this work, through patient-specific finite element analyses of actual biomechanical research topics. [less ▲]

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See detailFrom Metagenomes To Industrially Relevant Enzymes
Berlemont, Renaud ULg

Conference (2010, December)

Microorganisms living in extreme conditions have now been isolated from all type of extreme environments and numerous extremozymes originating from these organisms have been described and characterized ... [more ▼]

Microorganisms living in extreme conditions have now been isolated from all type of extreme environments and numerous extremozymes originating from these organisms have been described and characterized. Indeed, most of their potential resides in their enzymes. As stated by Huston in 2008 : “As environmental concerns arise, biological tools are increasingly replacing harsh chemical and physical means of processing materials and they even harbor promise for creating cost-effective sustainable energy sources. It is imperative that we continue investigating ways in which natural products can offer economical alternatives to traditional industrial processes”. In this context the search for valuable extremophiles and their integration in industrial processes will, without any doubt, fulfill these objectives in extending the use of microorganisms and of their products to unexpected transformations. Extensive investigations on extremophiles were therefore carried out for the reason that the large diversity of these organisms allowed to think that it is probably possible to find within them the appropriate isolate that produces the best possible product for a specific application. Of course these organisms have to be unravelled and their peculiarities sometimes render the culture conditions inappropriate. The recent emergence of the metagenomic approach has, however, modified the context and has now rendered possible the investigation of the world of non cultivable microorganisms. Indeed, recent advances of the metagenomic highlighted the underestimated gene diversity contained in environmental samples. In order to isolate new valuable cold adapted proteins, Antarctica soil metagenomic libraries were constructed and screened for various activities. Screenings were performed in industrially derived conditions, when feasible, and allowed the isolation of several new lipases/esterases, proteases, amylases, xylanases, … Hence, thorough characterization of the new enzymes is required prior their integration into industrial processes. We will discuss case-studies on three enzymes primarily isolated for the agro-food industry and displaying particular features. [less ▲]

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See detailFrom meteorites to evolution and habitability of planets
Dehant, Véronique; Breuer, Doris; Claeys, Philippe et al

in Planetary and Space Science (2012)

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See detailFrom Mixed Angles to Infinitesimals
Bair, Jacques ULg; Henry, Valérie ULg

in College Mathematics Journal (2008), 39(3), 230-233

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See detailFrom model validation to production of reference simulations: how to increase reliability and applicability of building and HVAC simulation models
Adam, Christophe; Andre, Philippe ULg; Georges, Bernard ULg et al

(2006, December)

Validation of simulation models appears from a long time as a key issue in order to promote a more intensive and more efficient use of simulation models in the field of building and HVAC simulation. IEA ... [more ▼]

Validation of simulation models appears from a long time as a key issue in order to promote a more intensive and more efficient use of simulation models in the field of building and HVAC simulation. IEA Annex 34/43 originally targeted a number of specific applications where a more advanced validation was required: ground coupling problems, multizone building, shading, day lighting and cooling load interaction, HVAC components and ventilated facades. These validation exercises were built on the large methodological experience obtained in previous projects and address sometimes very fundamental problems of heat transfer in buildings. Consulting engineers and practitioners might see these exercises as a bit too far from their objectives and it is the reason why an additional activity was proposed with the specific aim of producing, based upon the results of the validation of models, a set of reference simulations. These applications cover a range of building types (residential, commercial) and systems (production, distribution emission) and run in a variety of climates. The paper will describe how models dedicated to these applications were developed, starting from validation results, going through the selection and consolidation of simulation hypothesises and ending with a number that might be considered as reference for the concerned applications. The paper will concentrate on models required by a residential building application (multizone building equipped with a heat pump or a condensing boiler). Simulations make use of both EES and TRNSYS software and both software are applied in parallel as far as possible in the different applications in order to get a better judgment of their potential advantages and drawbacks. The use of reference simulations in view of qualifying normative methods currently in development in the frame of the European Energy Performance in Buildings Directive is also addressed and demonstrated in the paper. [less ▲]

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See detailFrom model validation to production of reference simulations: how to increase reliability and applicability of building and HVAC simulation models
Andre, Philippe ULg; Georges, Bernard ULg; Lebrun, Jean ULg et al

in Building Services Engineering Research & Technology (2008), 29(1), 61-72

Validation of simulation models appears from a long time as a key issue in order to promote a more intensive and more efficient use of simulation models in the field of building and HVAC simulation. IEA ... [more ▼]

Validation of simulation models appears from a long time as a key issue in order to promote a more intensive and more efficient use of simulation models in the field of building and HVAC simulation. IEA Annex 34/43 originally targeted a number of specific applications where a more advanced validation was required: ground coupling problems, multizone building, shading, day lighting and cooling load interaction, HVAC components and ventilated facades. These validation exercises were built on the large methodological experience obtained in previous projects and address sometimes very fundamental problems of heat transfer in buildings. Consulting engineers and practitioners might see these exercises as a bit too far from their objectives and it is the reason why an additional activity was proposed with the specific aim of producing, based upon the results of the validation of models, a set of reference simulations. These applications cover a range of building types (residential, commercial) and systems (production, distribution emission) and run in a variety of climates. The paper will describe how models dedicated to these applications were developed, starting from validation results, going through the selection and consolidation of simulation hypothesises and ending with a number that might be considered as reference for the concerned applications. The paper will concentrate on models required by a residential building application (multizone building equipped with a heat pump or a condensing boiler, heat emitted by radiators or floor heating systems). Simulations make use of both EES and TRNSYS software and both software are applied in parallel as far as possible in the different applications in order to get a better judgment of their potential advantages and drawbacks. The use of reference simulations in view of qualifying normative methods currently in development in the frame of the European Energy Performance in Buildings Directive is also addressed and demonstrated in the paper. [less ▲]

Detailed reference viewed: 63 (25 ULg)
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See detailFrom Modern Risks to Reflexive Society - An Alternative Approach to (Bio)terrorism
Brunet, Sébastien ULg; Claisse, Frédéric ULg; Rogister, yves

in Michel, Quentin (Ed.) Terrorisme, regards croisés - Terrorism, cross analysis (2005)

Au départ de quelques normes de portée nationale et internationale dont l'examen souligne la difficulté de parvenir à une définition opératoire du terrorisme, cet article propose un cadrage alternatif du ... [more ▼]

Au départ de quelques normes de portée nationale et internationale dont l'examen souligne la difficulté de parvenir à une définition opératoire du terrorisme, cet article propose un cadrage alternatif du phénomène terroriste fondé sur le paradigme des "risques réflexifs". Sous cet éclairage, le risque terroriste agit comme un véritable révélateur du rapport à notre environnement politique, social et technique: il est l'occasion de mettre en évidence des rapports de force, des relations politiques de domination et de dépendance qui constituent le contexte structurel de conflits locaux, régionaux ou internationaux; mais aussi, plus indirectement, en venant nous rappeler la vulnérabilité de nos collectifs, de plus en plus basés sur le fonctionnement en réseaux, l'interdépendance et le développement de macro-systèmes techniques. Il plaide pour une meilleure prise en compte de la dimension proprement politique du terrorisme et, plus largement, pour un basculement global vers un modèle de société ouverte plus sensible à des facteurs de risque trouvant leur origine dans nos propres pratiques et notre rapport au monde. Comme fil conducteur, des exemples empruntés au bioterrorisme, en ce que le phénomène paraît emblématique de la réflexivité des risques modernes. [less ▲]

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See detailFrom Monroe to Moreau: An analysis of face naming errors
Brédart, Serge ULg; Valentine, T.

in Cognition (1992), 45

Detailed reference viewed: 26 (3 ULg)
See detailFrom myopic coordination to resilience in socio-technical systems. A case study in a hospital
Nyssen, Anne-Sophie ULg

in Hollnagel, Erik; Paries, Jean; Woods, David (Eds.) et al Resilience Engineering in Practice: A guidebook (2011)

Detailed reference viewed: 84 (35 ULg)
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See detailFrom nets to bottom traps: is exploitation of Norway lobsters a suitable option for Corsican common spiny lobster fishermen?
Patrissi, Michela; Astrou, Adèle; Pelaprat, Corinne et al

Poster (2014, May 20)

In Corsica (NW Mediterranean), most of the fishing activity is composed of small-scale artisanal fisheries, and takes place on the western coast. The common spiny lobster (Palinurus elephas) is the main ... [more ▼]

In Corsica (NW Mediterranean), most of the fishing activity is composed of small-scale artisanal fisheries, and takes place on the western coast. The common spiny lobster (Palinurus elephas) is the main target of Corsican netters. However, its populations have been declining since the 1950's, questioning the sustainability of this activity. We therefore tried to assess whether the fishing effort, currently mostly focused on common spiny lobsters, could be moved towards other commercially-interesting deep crustaceans, such as the Norway lobster (Nephrops norvegicus), through diversification of artisanal fishing practices. With the help of local fishermen, we set up Scottish traps for Norway lobsters at depths of 300 to 400 meters, on sandy and muddy bottoms of both eastern and western coasts. Despite several tests using different baits and soak times at various depths or seasons, catches on the western coast were low. On the other hand, on the eastern coast, experimentation showed interesting yields, and large mean size (i.e. high commercial value) for both sexes. While more studies are needed to confirm these results and improve knowledge of Norway lobster stocks, trap fishing of this species on eastern coast of Corsica could be a suitable alternative for diversification of artisanal fisheries. [less ▲]

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See detailFrom Neural Stem Cells to Myelinating Oligodendrocytes
Rogister, Bernard ULg; Ben Hur, Tamir; Dubois-Dalcq, Monique

in Molecular & Cellular Neuroscience [=MCN] (1999), 14

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See detailFrom neurophysiology to genetics: cortical information processing in migraine underlies familial influences--a novel approach
Sandor, P. S.; Afra, J.; Proietti Cecchini, A. P. et al

in Functional Neurology (2000), 15(Suppl 3), 68-72

Migraine patients show impaired cortical information processing between attacks with deficient habituation of pattern-reversal visual evoked potentials (VEP), and strong intensity dependence of auditory ... [more ▼]

Migraine patients show impaired cortical information processing between attacks with deficient habituation of pattern-reversal visual evoked potentials (VEP), and strong intensity dependence of auditory cortical evoked potentials (IDAP). This could be a genetic trait as certain genetic patterns are known for evoked potentials in healthy subjects. VEP-habituation and IDAP were studied in 40 migraine patients, i.e. pairs of 20 parents and their children. We developed a novel approach based on Monte Carlo statistics to selectively assess vertical familial influences. Both groups, parents and children, were characterized by abnormal VEP-habituation and IDAP. However, similarity between related pairs was far more pronounced than similarity between unrelated pairs. Assessed with a novel statistical approach, familial influences proved to be highly significant in determining cortical information processing in migraineurs, thus supporting the important role of genetic factors. [less ▲]

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See detailFrom Newton's Fluxions to Virtual Microscopes
Bair, Jacques ULg; Henry, Valérie ULg

in Teaching Mathematics and Computer Science (2007), 5(2), 377-384

The method of fluxions was originally given by Newton in order to determine the tangent to a curve. In this note, we will formulate this method by the light of some modern mathematica tools.

Detailed reference viewed: 24 (0 ULg)