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See detailModèles statistiques Bayésiens et méthodologies pour calculer le Design Space (OPTIMAL-DS)
Marini Djang'Eing'A, Roland ULg; Lebrun, Pierre ULg; Hubert, Philippe ULg

Report (2009)

La compréhension des procédés technologiques et industriels dans les secteurs (bio)pharmaceutiques, biotechnologiques, agroalimentaires et environnementaux doit permettre de se conformer aux lignes de ... [more ▼]

La compréhension des procédés technologiques et industriels dans les secteurs (bio)pharmaceutiques, biotechnologiques, agroalimentaires et environnementaux doit permettre de se conformer aux lignes de conduites initiées par la FDA ou d'autres organismes de contrôles. Notamment, le document ICH Q8 introduit les notions de "Process Analytical Technology", de "Quality by Design" et de "Design Space", ayant attraits à la qualité des procédés industriels, des procédés d'analyse ainsi qu'à la qualité des produits finis. Cependant, si les lignes de conduites pour ces exigences sont expliquées, aucune méthodologie pour les atteindre n'est donnée. Or, un nombre considérable de nouvelles entités chimiques sont synthétisées par les laboratoires pharmaceutiques, biotechnologiques ou agroalimentaires. Les producteurs de matières premières et/ou d’excipients (secteur chimique) ont également besoin de disposer rapidement de méthodes analytiques de contrôle qui leur permettront de s’assurer de la qualité de leurs produits. On comprend aisément la nécessité pour ces secteurs de disposer rapidement de résultats fiables puisque les activités de recherches mais aussi des investissements, souvent importants, sont orientés ou stoppés sur base de données chiffrées, produits par les méthodes analytiques. La production de résultats fiables et la démonstration de cette fiabilité sont donc économiquement fondamentales. Ce projet vise la mise au point de stratégies et de modèles génériques de développement automatisé de nouvelles méthodes analytiques séparatives, en se basant sur la modélisation des temps de rétention, la planification expérimentale, et le concept de Design Space. L’objectif connexe est d’appliquer cette méthodologie à l’optimisation de n’importe quel procédé. Le fait de pouvoir disposer d’une méthodologie de mise au point automatique de méthodes analytiques ou de tous procédés analytiques aura un impact significatif. Cette nouvelle technologie permettra de réduire de façon drastique le temps d’optimisation des méthodes et procédés, permettant une production plus efficiente de produits (pharmaceutique, cosmétique, agro-alimentaire ou biotechnologique) répondant aux spécifications du client. [less ▲]

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See detailLocal search heuristics for large-scale discrete structural optimization with expensive black-box evaluations
Bay, Maud ULg; Crama, Yves ULg; Rigo, Philippe ULg

Report (2009)

This paper considers large-scale structural optimization problems featuring discrete variables, as well as nonlinear implicit constraints which can only be evaluated through time-expensive computations. A ... [more ▼]

This paper considers large-scale structural optimization problems featuring discrete variables, as well as nonlinear implicit constraints which can only be evaluated through time-expensive computations. A prominent application consists in the preliminary structural design of large ships, where many of the variables take their values in discrete sets which model standard element dimensions to be selected from catalogs, and where the evaluation of the constraints involves a complex structural analysis performed by black-box software. The resulting large-scale nonlinear combinatorial problems are particularly hard, and even nding a discrete feasible solution may prove challenging for some instances. In this paper, we propose two heuristics that combine local search methods and a sequential optimization method based on approximations of the implicit constraints. The heuristics are applied to the structural optimization of several large ships. For these instances, the heuristics provide discrete feasible solutions whose value is close to the optimal value of the continuous relaxation obtained by disregarding the discrete nature of the variables. [less ▲]

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See detailHOW TO MAKE NATURA 2000 WORK PROPERLY? : SOCIO-ECONOMIC, LEGAL AND ECOLOGICAL MANAGEMENT : "SELNAT"
Grogna, Valérie; Mahy, Marie; Meuris, Steve et al

Report (2009)

This report includes results obtained from the SELNAT research project, conducted between February 2006 and January 2008, under the auspices of the Belgian Science Policy. The principal subject of this ... [more ▼]

This report includes results obtained from the SELNAT research project, conducted between February 2006 and January 2008, under the auspices of the Belgian Science Policy. The principal subject of this project is the implementation of Natura 2000. The Natura 2000 network of protected areas, made up of sites designated under the Community Birds (BD) and Habitats Directives (HD), is a key pillar of action for the conservation of biodiversity (European Commission, 2008). It is central to achieve the commitment to reverse the decline of biodiversity in the European Union by the year 2010 made at the European Council meeting in Gothenburg in June 2001. It aims at sustainable conservation of habitats and species of community importance, taking into account (i) economic, social and cultural requirements and (ii) regional and local circumstances. Central to the Directives is the creation of a Europe-wide ecological network of protected sites – the Natura 2000 Network – which is destined to conserve over a thousand rare, threatened and endemic species and some 220 Natural habitats listed in their annexes. Around 24,000 sites have been included in the Network so far. (European Commission, 2008) Now that the network set-up is nearing completion, there is a need to increase the focus on the active management of the sites so as to ensure long-term conservation and the achievement of the economic and social objectives of the network (CEE, 2004.) This in turn also raises the question of finding the appropriate management strategy, instruments and sufficient financing (at all levels). The principal question for Member States is how to manage Natura 2000 sites to reach the (juridical fixed) ecological targets in the most cost-efficient way, taking into account economic and social objectives and constraints. Ecologists and nature organisations often start from an techno-ecocentric paradigm: ‘How to conserve and manage species and habitats?’, in order to tackle the question mentioned above. The paradigm starts from the opinion that ‘diversity of species and habitats’ is important as such (while this is believed to be important for several reasons). This approach has been criticised lately for being based on a too narrow set of values. It has not provided enough opportunities for combining nature conservation with other forms of land use such as agriculture, forestry or tourism. In several countries this led to difficulties as regards the co-operation of local stakeholders (Jongman & Kristiansen, 1998). On the other hand, the current biodiversity crisis is a direct result of the way in which society has chosen to interact with its Natural environment. If the causes of the problem are social, it stands to reason that the policies striving to solve the problem will need to be based on a solid understanding of social structures and processes, if they are to have any effect. In this research project we tried to study the management of Natura 2000 sites from a ‘sustainability’ paradigm, instead of from the ecocentric paradigm. The central research question is therefore formulated as ‘How to manage Natura 2000 properly, to contribute to a (local) sustainable society?’ With this research we hope to give decision-makers new insights on the economic, social, and environmental consequences of Natura 2000 management and to guide them in the development of more adequate and sustainable policies for the management of Natura 2000-sites. In the first chapter the general objectives and approach of this project are described. The second chapter gives an overview of some of the current bottlenecks for nature conservation and Natura 2000. The results of the research on the elaboration of strategies for Natura 2000 sites are summarizes in chapter tree. Conclusions and recommendations are presented in the last chapter. More information on the research is documented in the different appendixes. During the research, we benefited from contacts with many persons, and more especially in the scope of a Users’ Committee. Besides the representatives of the Belgian Science Policy, we would like to thank all members of the Users’ Committee, among which those who supported us and/or participated in one or several of the meetings, [less ▲]

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See detailLa consommation de produits bio
Duquesne, Brigitte ULg; Andres, Ludovic ULg

Report (2009)

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See detailPour un Observatoire du secteur associatif et du non-marchand en Communauré française
Marée, Michel ULg

Report (2009)

Le rapport présente les recherches menées dans le cadre de l'Observatoire du secteur associatif et du non-marchand. Celui-ci prévoit un ensemble d'études spécifiques sur le secteur associatif et le non ... [more ▼]

Le rapport présente les recherches menées dans le cadre de l'Observatoire du secteur associatif et du non-marchand. Celui-ci prévoit un ensemble d'études spécifiques sur le secteur associatif et le non-marchand et constitue une sorte d'interface entre d'une part, les institutions possédant des données et des informations sur les associations (Banque nationale, ONSS, centres de recherche,...) et, d'autre part, les acteurs de la société civile et du monde politique qui ont besoin d'une vision claire et cohérente du secteur. La recherche comporte deux axes : 1° un travail de mise en forme et de valorisation de recherches menées sur le secteur associatif et le non marchand, qu'il s'agisse d'études statistiques ou de travaux universitaires spécifiques; 2° la mise au point d'outils de diffusion des résultats des recherches : sites internet, matériel d'information destiné au public, diffusion de documentation auprès des réseaux d'enseignement et de formation,... [less ▲]

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See detailRapport Annuel 2009: Analyses non destructives d'un livre du 17ème siècle
Fievet, Sarah; Cervera Xicotencatl, Ariadna; Hocquet, François-Philippe ULg et al

Report (2009)

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See detailConférences: Les rencontres du CEA en 2008
Van Ruymbeke, Muriel ULg

Report (2009)

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See detailRapport 2 (comité de thèse)
Zirbes, Lara ULg

Report (2009)

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See detailLa laïcité en province de Liège
Pieters, Jérôme ULg; Jamin, Jérôme ULg; Jacquemain, Marc ULg

Report (2009)

Au moyen de focus groups ciblés et d'une enquête on line, le rapport dresse une première et schématique description du public de la laïcité organisée en province de Liège, ainsi que de ses attentes et ... [more ▼]

Au moyen de focus groups ciblés et d'une enquête on line, le rapport dresse une première et schématique description du public de la laïcité organisée en province de Liège, ainsi que de ses attentes et représentations. Au niveau sociologique, le public reste clairement marqué âgé, masculin et fortement éduqué. En termes de représentations, on voit se dégager deux "noyaux" : un premier centré sur le thème classique de la séparation entre le politique et le religieux, un autre beaucoup plus directement organisé autour de la libre pensée. Les jeunes sont marqués par les valeurs de "libre disposition de soi" caractéristique des valeurs "postmatérialistes". [less ▲]

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See detailCompilation commentée de la littérature portant sur le soutien public et privé à la culture par d'autres voies et moyens que la subvention publique directe
Husson, Jean-François ULg; Paindavoine, Isabelle; Sepulchre, Vincent ULg

Report (2009)

Revue de la littérature et de sources officielles concernant les instruments budgétaires et fiscaux, autre que le financement budgétaire direct, concourant au financement de la culture. Le rapport aborde ... [more ▼]

Revue de la littérature et de sources officielles concernant les instruments budgétaires et fiscaux, autre que le financement budgétaire direct, concourant au financement de la culture. Le rapport aborde la situation en Belgique et dans plusieurs autres pays : France, Grande-Bretagne, Allemagne, Italie, Hongrie, Pays-Bas, Suisse, Etats-Unis et Canada. [less ▲]

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See detailESTUDIO DE EMISIÓN SONORA/TEXTURA DE UNA MEZCLA BBTM EN LA CM-3109 (CASTILLA-LA MANCHA)
Paje, S.E.; Bueno, M.; Luong, Jeanne ULg et al

Report (2009)

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See detailFerme Delsamme : action entre utopie et réalité
Muramatsu, Kenjiro ULg

Report (2009)

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See detail« Dessinez la Belgique » : Représentations, perceptions et préférences fédérales d’étudiants universitaires belges francophones
Reuchamps, Min ULg; Grandjean, Geoffrey ULg; Flaba, Elodie ULg et al

Report (2008)

In an experimental design, we asked 234 French-speaking Belgian university students to “draw Belgium”. No other guidelines were given. In addition to this request, the students were asked to fill in a 19 ... [more ▼]

In an experimental design, we asked 234 French-speaking Belgian university students to “draw Belgium”. No other guidelines were given. In addition to this request, the students were asked to fill in a 19-question questionnaire about their federal perceptions and preferences as well as political and socio-demographic indicators. This experimental research is an attempt to capture the relationships between representations and perceptions of federalism in Belgium. This short preliminary report offers the first results and insight from this research. Further analyses and publications will follow. [less ▲]

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See detailRunning an Interdisciplinary Competency Group
Stassart, Pierre M ULg

Report (2008)

This paper presents a translation of part of a report written by a CRE colleague in Belgium. It concerns the development of a distinctive method of conducting interdisciplinary research, known as a ... [more ▼]

This paper presents a translation of part of a report written by a CRE colleague in Belgium. It concerns the development of a distinctive method of conducting interdisciplinary research, known as a Competency Group. A Competency Group brings together a range of individuals with differing experiences and knowledge of a particular problem. The Competency Group aims to move thinking about the problem forward through group interaction. This translation outlines four key principles for working in this way: the narrative form; intersections between systems of reference; putting knowledge to the test and mutual learning; and the suspension of strategic interests. [less ▲]

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See detailDéfauts d'orientation et de battement
Debongnie, Jean-François ULg

Report (2008)

The problem of orientation or runout errors being formulated, it is firt noted that these errors necessarily include the form errors of the measured part. The second problem is the correct asseement of a ... [more ▼]

The problem of orientation or runout errors being formulated, it is firt noted that these errors necessarily include the form errors of the measured part. The second problem is the correct asseement of a simulated reference when the reference surface is of imperfect form. The logical choice would be perfect form having the least maximal distance to the physical one. But this choice being a difficult one, the best approximation in the least square sense if often chosed. The effect of this reference perturbation is studied. [less ▲]

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See detailThéorie des erreurs de rectitude et de planéité
Debongnie, Jean-François ULg

Report (2008)

This report is focused on straightness and flatness errors, in a common frame. Starting with the framing of a compact of a 2-D or 3-D space by two parallel hyperplanes, it is first noted that the given ... [more ▼]

This report is focused on straightness and flatness errors, in a common frame. Starting with the framing of a compact of a 2-D or 3-D space by two parallel hyperplanes, it is first noted that the given compact may be replaced by its convex closure. It is then proved that the separation of the framing hyperplanes varies continuously with their common normal vector. From this follows that a minimal separation is reached for a given orientation of the hyperplanes. However, this optimal orientation is not necessary unique. An optimality criterium is obtained, which concerns the number and the position of the contact points of the given surfave with the framing hyperplanes. Finally, a direct method of obtaining the optimum is presented. [less ▲]

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See detailThéorie de l'erreur de circularité
Debongnie, Jean-François ULg

Report (2008)

This report gives the theory of the circularity error, as defined by ISO-norms, that is, the minimum of the radius difference between two concentric circles that enclose the measured curve. The common ... [more ▼]

This report gives the theory of the circularity error, as defined by ISO-norms, that is, the minimum of the radius difference between two concentric circles that enclose the measured curve. The common center of the optimal pair of circles being called the best center, the question of its existence is fully discussed. It is then proved that this problem is equivalent to the research of a circle which is the best approximation of the given curve by respect of a uniform norm. A characterization of the best center is developed, from which the unicity of the best center is proved. [less ▲]

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See detailModelling of the squeeze film air damping in MEMS
Bruls, Olivier ULg

Report (2008)

This document proposes a formulation of the squeeze film air damping in micro-plates. The nonlinear Reynolds equation for compressible film is used to analyze the air pressure field, whereas a standard ... [more ▼]

This document proposes a formulation of the squeeze film air damping in micro-plates. The nonlinear Reynolds equation for compressible film is used to analyze the air pressure field, whereas a standard linear elastic model is used for the displacement field. The formulation is based on a finite element discretization of both the pressure and displacement fields. The coupled equations of motion are established and, for harmonic oscillations, we show that the resulting damping matrix depends on the frequency. [less ▲]

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See detailRencontre citoyenne sur le fédéralisme – 29 septembre 2007, Université de Liège
Reuchamps, Min ULg

Report (2008)

This report present the preliminary results of the first out four citizens' meeting that took place at the Université de Liège, on September 29, 2007. The preliminary analyses of the qualitative and ... [more ▼]

This report present the preliminary results of the first out four citizens' meeting that took place at the Université de Liège, on September 29, 2007. The preliminary analyses of the qualitative and quantitative data collected during the nine hours long exchanges are presented in this paper. The first analyses shed light on the relations between the federal perceptions and preferences of French-speaking Belgian citizens. The preliminary results emphasise the diversity of knowledge, attitudes and opinions on Belgian federalism and highlight the contrast between these perceptions and preferences and the federal reality of Belgium as well as its possible evolution. [less ▲]

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See detailGoodness-of-fit tests for censored regression based on artificial data points
González Manteiga, Wenceslao; Heuchenne, Cédric ULg; Sánchez Sellero, Cesar

Report (2008)

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See detailSchuld und Scham - shame and guilt
Pontzen, Alexandra ULg; Preußer, Heinz-Peter

Report (2008)

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See detailCentre Pilote wallon des Céréales et Oléo-Protéagineux (CePiCOP)
Vancutsem, Françoise ULg; Monfort, Bruno; Cartrysse, Christine et al

Report (2008)

Detailed reference viewed: 5 (1 ULg)
See detailEnhancement of the poly/mono growth rate ratio for BiCMOS application
Nguyen, Ngoc Duy ULg; Loo, Roger

Report (2008)

Detailed reference viewed: 8 (0 ULg)
See detailLes rencontres du CEA en 2007
Van Ruymbeke, Muriel ULg

Report (2008)

Detailed reference viewed: 11 (1 ULg)
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See detailRapport 1 (comité de thèse)
Zirbes, Lara ULg

Report (2008)

Detailed reference viewed: 8 (2 ULg)
See detailElaboration of a PK/PD model of tiludronate in horses: a preliminary study
Delguste, Catherine ULg; Doucet, M; Lepage, O et al

Report (2008)

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See detailModel-Based Multifactor Dimensionality Reduction for detecting interactions in high-dimensional genomic data.
Calle, M L; Urrea, V; Vellalta, G et al

Report (2008)

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See detailDiffusion et institutionnalisation des normes internationales : France, OMC/UNESCO et l’enjeu de la diversité culturelle
Vlassis, Antonios ULg

Report (2007)

Le commerce et les biens culturels sont une source perpétuelle d’antagonisme et de désaccords tant au niveau national qu’international. La culture est un champ d’intérêt commercial considérable ainsi ... [more ▼]

Le commerce et les biens culturels sont une source perpétuelle d’antagonisme et de désaccords tant au niveau national qu’international. La culture est un champ d’intérêt commercial considérable ainsi qu’une expression profondément significative du patrimoine national et du dynamisme artistique. D’ailleurs, la culture est inéluctablement vouée à osciller entre la sphère artistique et la sphère marchande. La nature ambiguë et équivoque des activités et des expressions culturelles - et en particulier audiovisuelles - suspendues entre l’art et l’industrie, entre la production symbolique et la production matérielle, suscite de plus en plus un débat politique à la fois virulent et polémique sur la scène internationale. La question de la préservation de la diversité des expressions culturelles et la nécessité de la protection « des écosystèmes culturels » dans le contexte de globalisation croissante économique et financière a pris depuis une quinzaine d’années une ampleur, difficilement imaginée auparavant. En effet, la problématique de base qui est soulevée est celle de la circulation des produits culturels à l’échelle mondiale, régionale, ainsi que nationale et celle du traitement à accorder aux biens/services culturels et artistiques dans les accords commerciaux internationaux. [less ▲]

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See detailLe questionnaire d'autodiagnostic : Note méthodologique
Crutzen, Nathalie ULg

Report (2007)

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See detailEnquête auprès des jeunes Liégeois – 2007 : Intérêt politique, participation, sentiments d'appartenances et rôle de l'État
Fournier, Bernard ULg; Pironet, Alexia; Reuchamps, Min ULg

Report (2007)

In February and March 2007, we passed a survey on 1437 students from different schools in Liège, Belgium. This research is a replication of a research done in the same schools – but one – in 1990 by one ... [more ▼]

In February and March 2007, we passed a survey on 1437 students from different schools in Liège, Belgium. This research is a replication of a research done in the same schools – but one – in 1990 by one of us. However, several questions were added to the 2007 questionnaire in order to apprehend the new dimensions that we developed over the last 17 years. The results which are presented here are only preliminary; further analyses are being undertaken. More sophisticated statistical methods are used to explore the two databases. [less ▲]

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See detailMechanical based circular notch hinge design
Merken, Patrick; Smal, Olivier; Debongnie, Jean-François ULg et al

Report (2007)

At the microscale, classical bearings such as ball bearings, sliding bearings and other pivots may be difficult to manufacture. Among all possible solutions to replace them, the notch hinge seems to be ... [more ▼]

At the microscale, classical bearings such as ball bearings, sliding bearings and other pivots may be difficult to manufacture. Among all possible solutions to replace them, the notch hinge seems to be very attractive through its many advantages. The major limitation is on the rotation angle. This paper presents a new simplified analytical model for the prediction of the maximum angular displacement and the angular stiffness of a notch hinge. To validate our model, an experimental set-up has been developed. Finally, the results are compared to other theories. [less ▲]

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