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See detailReal-time processing of depth and color video streams to improve the reliability of depth maps
Pierard, Sébastien ULg; Leens, Jérôme ULg; Van Droogenbroeck, Marc ULg

Poster (2009, November)

Depth is a useful information in vision to understand the geometrical properties of an environment. Depth is traditionally computed in terms of a disparity map acquired by a stereoscopic system but, over ... [more ▼]

Depth is a useful information in vision to understand the geometrical properties of an environment. Depth is traditionally computed in terms of a disparity map acquired by a stereoscopic system but, over the last few years, several manufacturers have released single-lens cameras that directly capture depth information (also called range). This is an important technological breakthrough although range signals remain difficult to handle in practice, due to many reasons (low resolution, noise, low framerate, . . . ). Practitioners still struggle to use range data in their applications. The purpose of this paper is to give a brief introduction to range data (captured with a camera), discuss common limitations, and propose techniques to cope with difficulties typically encountered with range cameras. These techniques are based on a simultaneous view of the scene by a color and a depth camera that are combined to improve their interpretation in real time. [less ▲]

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See detailLa 11β-hydroxystéroïde déshydrogénase de type 1 – 1re partie Rôle de l’exposition tissulaire au cortisol dans le risque métabolique lié à l’obésité
Iovino, A.; Scheen, André ULg

in Médecine des Maladies Métaboliques (2009), 3

Abdominal obesity plays a key role in the development of metabolic syndrome. Similarities between metabolic syndrome and Cushing disease suggest that excessive local tissue exposition to glucocorticoids ... [more ▼]

Abdominal obesity plays a key role in the development of metabolic syndrome. Similarities between metabolic syndrome and Cushing disease suggest that excessive local tissue exposition to glucocorticoids, despite normal circulating plasma levels, might contribute to the pathophysiology of metabolic syndrome. To this respect, 11β-hydroxysteroid dehydrogenase type 1 (11HSD1), the enzyme which converts cortisone (inactive) to cortisol (active) in target tissues, raises much interest. Indeed, several studies showed both increased expression and activity of this enzyme in adipose tissues in presence of obesity. Even more striking, experimental data in rodents showed a direct link between increased 11HSD1 activity and the development of metabolic abnormalities. Furthermore, studies in mice KO for 11HSD1 confirmed the potential of inhibiting this enzyme to attenuate metabolic abnormalities related to visceral adiposity. Selective inhibitors of 11HSD1 are currently in development, and preliminary results obtained in rodents appear promising, with significant improvements in glucose and lipid profiles. The development of potent and selective 11HSD1 inhibitors may open new prospects in the treatment of metabolic syndrome or type 2 diabetes associated with abdominal obesity in humans. [less ▲]

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See detailLa qualité paysagère et l'ancrage identitaire des espaces d'activités urbains: un atout pour le développement de l'économie urbaine.
Ruelle, Christine ULg

in Territoire(s) wallon(s) (2009), 3

The development of new economic estates regularly provokes strong reactions among local communities. These protests, usually considered as nymbist, question the design of urban economic estates: might a ... [more ▼]

The development of new economic estates regularly provokes strong reactions among local communities. These protests, usually considered as nymbist, question the design of urban economic estates: might a better quality design more concerned with local landscape features be more welcome by the communities on the short and longer terms? [less ▲]

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See detailCommentaire de l'article 182 du CWATUP
Donnay, Luc ULg

in Commentaire systématique du CWATUP (2009)

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See detailEtude numérique et sur modèle physique de l'aménagement de Taoussa (Mali)
Erpicum, Sébastien ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in SHF, (Ed.) Modèle physiques hydrauliques - Outils indispensables du XXIe siècle (2009, November)

Physical modeling and numerical modeling are two efficient analysis approaches in hydraulic engineering. The interactive application of both methods is obviously the more effective response to most of the ... [more ▼]

Physical modeling and numerical modeling are two efficient analysis approaches in hydraulic engineering. The interactive application of both methods is obviously the more effective response to most of the flow problems analysis. Indeed, it enables combining the inherent advantages of both approaches, which are complementary, while being beneficial to the delays as well as the quality of the analyses. This paper presents the results of a successful application of such a combined numerical – physical study carried out by the Hydraulics engineering Laboratory of the University of Liège on behalf of Coyne et Bellier. It concerned, at the stage of detailed draft, the hydraulic study of the Taoussa Project on the Niger River in Mali. The studies, performed in less than 6 months, focused on the flow characteristics at the scale of the reservoir and the river, using the numerical approach, as well as on hydrodynamic details in the spillway using a large scale factor physical model. [less ▲]

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See detailDynamic Thermal Modeling of a Radiant Panel System and its Environment for Commissioning: Application to a Case Study
Fonseca Diaz, Nestor; Bertagnolio, Stéphane ULg

in Proceedings of the 9th International Conference for Enhanced Building Operation, Austin, TX (2009, November)

As a part of a commissioning study, the cooling ceiling system of a large commercial building located in Belgium is evaluated. A representative office has been instrumented and data on the cooling ceiling ... [more ▼]

As a part of a commissioning study, the cooling ceiling system of a large commercial building located in Belgium is evaluated. A representative office has been instrumented and data on the cooling ceiling system operating in real conditions have been collected. The simulation of the whole system is performed by means of a dynamic thermal model of the building and its HVAC system. The model considers the radiant panels as a dynamic-state finned heat exchanger connected to a simplified lumped dynamic model of the building. The behavior of the radiant ceiling system and the interactions with his environment (walls, ventilated façade, internal loads and ventilation system) has been experimentally and numerically evaluated. Commissioning test results show that the influence of surfaces temperatures inside the room, especially the façade, is considerable. Then, it is clear that the radiant ceiling system must be evaluated together with its designed environment and not as separate HVAC equipment. [less ▲]

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See detailEngagement citoyen et société civile
Pirotte, Gautier ULg

in SociologieS (2009)

Using the post-communist experience in Romania, this article reflects upon the way to bring together the concepts of civil society and citizen commitment. Whilst civil society does not concentrate all the ... [more ▼]

Using the post-communist experience in Romania, this article reflects upon the way to bring together the concepts of civil society and citizen commitment. Whilst civil society does not concentrate all the phenomena of citizenship, the concept remains nonetheless a privileged expression of citizen commitment. The question underlying this text is relatively simple: how should the study of citizen commitment be approached within the new civil societies of Central and Eastern Europe, and more specifically within the new Romanian civil society ? As simple as it may appear, the question becomes rapidly more complex as soon as the problems deriding from the concepts of civil society and citizen commitment themselves are taken into consideration but also because the post-communist experience is often treated in a homogeneous way whilst it is in fact empirically very heterogeneous. [less ▲]

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See detailPaysage tactile: l'arbre dans le projet du paysage
Occhiuto, Rita ULg

in Territoire(s) Wallon(s) (2009), 3

The landscape, in crisis because of the abstraction process of Human and Nature relationship, requires tools able to face the distance and the loss of character and materiality of our life environments ... [more ▼]

The landscape, in crisis because of the abstraction process of Human and Nature relationship, requires tools able to face the distance and the loss of character and materiality of our life environments. Countries are reduced to open spaces and parks to green spaces. The opposition between full-void shapes landscapes becomming objects without meaning. The sustainable development, a new green revolution, might become a new slogan of consumer's society. The horizontal glance allows to find new methods of reading and writing to decode the environment materiality, awakening the body to tactile perception. The project as an open work permits the evolution of intentions and integrates Nature, time and mutation as elements of landscape co-generation. Observation, sites practice and awareness become the active material of the landscape project. [less ▲]

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See detailL'inventaire forestier national permanent du Grand-Duché de Luxembourg, dix années d'existence
Rondeux, Jacques ULg; Wagner, Marc; Kugener, Georges et al

in Forêt Wallonne (2009), (103), 3-16

Actuellement, la surface boisée du Grand-Duché de Luxembourg est de 89 150 hectares, ce qui correspond à un taux de boisement de 34,3 %. Le pays compte quatre grands territoires distincts (domaines ... [more ▼]

Actuellement, la surface boisée du Grand-Duché de Luxembourg est de 89 150 hectares, ce qui correspond à un taux de boisement de 34,3 %. Le pays compte quatre grands territoires distincts (domaines écologiques) caractérisés par des conditions géomorphologiques et climatiques particulières. Au nord, l’Oesling prolonge le massif ardennais et comporte essentiellement des forêts d’épicéa et de hêtre. Le Gutland couvre le centre et le sud du pays et se compose majoritairement de forêts de hêtre et de chêne. Le Bassin de la Minette, de surface plus restreinte, se situe dans l’extrême sud-ouest du pays et se caractérise par la présence de forêts mélangées présentant une grande diversité d’essences et de végétations pionnières sur d’anciennes exploitations de minerai de fer à ciel ouvert. Enfin, la Vallée de la Moselle, située dans le sud-est du territoire, occupe également une faible surface et la forêt y est nettement moins représentée au bénéfice des vignobles. La forêt publique soumise au régime forestier concerne 39 900 hectares (44,8 %). Avec 49 250 hectares, la forêt privée représente les 55,2 % restants. Ce survol rapide de la forêt grand-ducale montre la grande variabilité rencontrée sur un territoire relativement exigu, présentant une grande diversité naturelle qui se superpose à un grand morcellement des propriétés. Celles-ci ont des objectifs et des types de gestion pouvant varier notamment selon la nature publique ou privée des propriétaires. Le besoin de connaître les ressources forestières nationales s’est joint à celui de s’inscrire dans une démarche internationale, partagée par l’ensemble des pays de l’Union Européenne en matière de valorisation, de conservation et de protection des ressources naturelles, pour déterminer le Grand-Duché de Luxembourg à se doter d’un inventaire forestier permanent. C’est ainsi qu’en 1996, l’Administration de la Nature et des Forêts a lancé le projet « Inventaire Forestier National Permanent » avec l’aide de l’Université de Liège (Gembloux Agro-Bio Tech) pour les aspects méthodologiques. Cet inventaire est devenu un instrument de politique forestière nationale et, à ce titre, joue le rôle d’un véritable « tableau de bord » permanent de l’ensemble de la forêt luxembourgeoise. C’est en 2003 que les premiers résultats ont vu le jour et ont fourni le premier état des lieux ou une photographie de la situation de l’époque. Dix années plus tard, fort de l’expérience acquise et des nombreuses retombées positives enregistrées, un second cycle de mesures est en voie de réalisation. Il devra, entre autres, permettre d’estimer la productivité de la forêt luxembourgeoise et d’appréhender la disponibilité de la ressource ; il servira aussi d’instrument de mesure en matière de durabilité de la gestion, s’inscrivant ainsi dans les démarches de certification. Les objectifs poursuivis par l’inventaire permanent visent à estimer les ressources forestières et leur évolution en termes de surface et de matériel sur pied. La connaissance des ressources forestières à l’échelle nationale est particulièrement importante en matière de politique forestière, de gestion des massifs forestiers, d’approvisionnement pour l’industrie du bois et, en s’amplifiant au cours du temps, de monitoring de la biodiversité en forêt ainsi que de suivi de la mise en œuvre de la directive européenne « Habitats ». De même, au niveau international, l’inventaire s’avère être l’indispensable référence dans le contexte des enquêtes diligentées par des organismes internationaux tels que l’Organisation des Nations Unies pour l’Alimentation et l’Agriculture (FAO), l’Union européenne (UE) ou encore dans le cadre d’initiatives soutenant la coopération scientifique entre pays. C’est le cas de l’Action COST E43 « Harmonisation of National Forest Inventories in Europe: Techniques for Common Reporting », à laquelle le Grand-Duché a apporté son soutien. Le présent article a pour objet principal de faire le point sur l’approche globale qui a été validée et retenue pour activer toute la dynamique du second cycle de mesures. [less ▲]

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See detailAvancées concernant l’Aliskiren (Rasilez®), inhibiteur direct de la rénine, et l’Aliskiren-hydrochlorothiazide (Rasilez HCT ®)
Boxho, G.; Krzesinski, Jean-Marie ULg; Scheen, André ULg

in Revue Médicale de Liège (2009), 64(11), 560-565

Aliskiren (Rasilez®), a direct renin inhibitor, is currently indicated for the treatment of essential hypertension, as monotherapy or in combination, especially with hydrochlorothiazide (Rasilez HCT®). It ... [more ▼]

Aliskiren (Rasilez®), a direct renin inhibitor, is currently indicated for the treatment of essential hypertension, as monotherapy or in combination, especially with hydrochlorothiazide (Rasilez HCT®). It may also be use to obtain a more complete blockade of the renin-angiotensin-aldosterone system (RAAS) when it is associated with an angiotensin converting enzyme inhibitor (ACEI) (or an AT1 angiotensin receptor antagonist) (ARA). There is some room for agents that may be more efficacious in reducing the progression of diabetic nephropathy than ACEI or ARA. In this context, the dual blockade of RAAS most probably offers a better efficacy than the simple blockade, but also exposes to a higher risk. Should ongoing trials confirm the preliminary favourable results, aliskiren might reach a forefront position among the armamentarium now available to optimize the RAAS blockade. The present article will summarize advances concerning the biochemical effects of the specific mode of action of aliskiren, especially the potential interferences related to increased renin/pro-renin levels, as well as results of recent clinical trials, not only in hypertension, but also in the fields of diabetes, renal insufficiency and cardiology. The objectives and design of the landmark study ALTITUDE will also be briefly presented. [less ▲]

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See detailLe théâtre du pauvre. De Mallarmé à Kahn
Durand, Pascal ULg

in Basch, Sophie (Ed.) Gustave Kahn (1859-1936) (2009)

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See detailcarnet de pédiatrie: douleur, inconfort et angoisse chez le nouveau-né et l'enfant
Battisti, Oreste ULg

Learning material (2009)

texte synthtétique concernant la douleur, l'angoisse et l'inconfort chez le nouveau-né et l'enfant, y compris les réflexions éthiques et philosophiques

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See detailUse of NIR spectroscopy for the determination of internal quality of entire apples
Sinnaeve, Georges; Fernàndez Pierna, J. A.; Lognay, Georges ULg et al

Poster (2009, November)

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See detailNIRS for the Determination of Internal Quality of Entire Apples
Sinnaeve, Georges; Pissard, A.; Fernàndez-Pierna, J. A. et al

in NIR-2009 Breaking the Dawn (2009, November)

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See detailRelative efficiency of non parametric error rate estimators in multi-group linear discriminant analysis
Glele Kakaï, R. L.; Pelz, Dieter; Palm, Rodolphe ULg

in African Journal of Mathematics and Computer Science Research (2009), 2(10), 218-224

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See detailLe point sur les données actuellement disponibles en épidémiologie de la carie chez les enfants belges
Lardinois, Julie; Gueders, Audrey ULg; Geerts, Sabine ULg

in Revue Médicale de Liège (2009), 64

Le nombre limité de données épidémiologiques sur la santé bucco-dentaire des enfants belges nous a conduits à réaliser une étude pilote dans ce domaine. L'objectif était de recenser un maximum d ... [more ▼]

Le nombre limité de données épidémiologiques sur la santé bucco-dentaire des enfants belges nous a conduits à réaliser une étude pilote dans ce domaine. L'objectif était de recenser un maximum d'informations sur la carie dentaire et ses facteurs de risque. L'enquête a été réalisée sous la forme d'un dépistage clinique chez des enfants âgés entre 6 et 12 ans et scolarisés dans deux établissements de la région liégeoise. [less ▲]

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See detailCan the syllabus actually impact students' perceptions of a course regarding their personal needs and motivation? (Exploring consistencies between syllabi’s qualities and benefit on students’ attitude toward a course)
Leduc, Laurent ULg

Conference (2009, November)

Faculties at the University of Liège, just like so many of their academic colleagues worldwide, have to write and orally present a syllabus for each of their courses every year. Although very demanding ... [more ▼]

Faculties at the University of Liège, just like so many of their academic colleagues worldwide, have to write and orally present a syllabus for each of their courses every year. Although very demanding, this effort is clearly described by many authors as an important opportunity to make a decisive first impression and to favourably affect students’ attitude and perceptions toward a given course regarding their personal needs and motivation notably. Even if the hypothesis seem plausible and inspiring for practice at first sight, the likelihood of a given syllabus to actually impact those perfection in the right way still has to be experienced. So, for a syllabus whose qualities / characteristics seem to make it likely or not to impact positively or negatively learners’ perceptions of courses linked to their motivation and individual needs, will consistent effects be observed on the ones who have read / heard it? Among the students’ perceptions that an effective syllabus would be likely to positively impact according to the literature, some appear to correspond to the three determining factors of the motivational dynamics’ model from Roland Viau [1997]: the perception of controllability [Bain, 2004; Lang, 2006; Hudd, 2003], the perception of activities value [Wasley, 2008, Hammons & Shock, 1994; Johnson, 2006] and the perception of competency [Slattery & Carlson, 2005; Madson, Melchert, Whipp, 2004]. Other theoretical benefits of the syllabus on students’ attitude refer to the “consideration of what students need in order to be successful learners” [Hess & Whittington, 2003] or the support of “developmental needs of the students” [Haugen, 1998]. Here, items used to check learners’ perceptions and to observe if “the syllabus addresses the question of whether the class will meet student needs” [Birdsall, 1989] have been closely related to the levels of Abraham Maslow’s Hierarchy of Needs Chart. In 2008, within its mandatory program of pedagogical training for new faculties, the IFRES (Institute for Training and Research in Higher Education) has created a thematic seminar offering guidelines to promote syllabi aiming notably to motivate students and meet developmental needs. At the beginning of the following academic year, ten syllabi and introduction speeches - meant to Freshmen or Sophomores and designed by ten faculties who followed the seminar - were collected and recorded in order to be analyzed. Their likelihood to impact the targeted students’ perceptions was then rated according to criteria rigorously derived from literature. During the second class of the ten teachers, questionnaires were submitted to their 1300 First/Second-Year students in order to investigate the possible corollary impact of those transmitted pieces of information on their concerned perceptions. In order to measure hypothetical gains due to syllabi, couples of symmetrical pre and post items were included. Data collected from the students concerning their post perceptions and their answers about their reading / hearing or not of their respective syllabi /oral speeches are currently crossed. Chi squares are calculated to identify significant relationships between them, as well as correlations indexes. Afterwards, synoptic tables are produced to observe consistencies between ratings of teachers’ performances and students’ levels of declared perceptions. At this stage, it appears that variables regarding motivation are clearly independent for about 2/3 of the studied relations. Nevertheless, considering the cases where the X²test indicate links between the data, concrete consistencies can be observed between the ratings obtained from the content analysis of syllabi or speeches and the observed percentages of students declaring good perceptions. Besides, the comparison of the percentages of students declaring good perceptions before and after having received syllabi and speeches clearly indicate frequent consistencies with the syllabi’s ratings on the same variables. Looking at the impressive number of universities everywhere asking or urging their teachers to produce syllabi for each of their courses, it seems obvious that this task has become a classic in any faculty’s pedagogical practice. This generalization also seems to indicate a consensus on the fact that this effort make sense and can be useful, particularly for students. This research aims to objectify this usefulness in order to guide and promote professors’ reflection on effective syllabus - for instance in the context of a regulated training seminar -, especially since it is also considered to benefit as planning tool for faculties [Littlefield, 1999; Matejka & Kurke, 1994 ; Sinor & Kaplan], or as permanent record for promotions or program consistency [Parkes & Harris, 2002; Leibow, 2003 ; Seldin, 1998]. [less ▲]

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See detailCoupling Optiview and Production Simulation
Caprace, Jean-David ULg; Aracil Fernandez, Francisco ULg; Hübler, Michael et al

in Proceeding of the 16th International Conference of Ship and Shipping Research (2009, November)

This paper presents new developments to link OptiView and a Discrete Event production Simulation (DES) software. The OptiView Software, is designed to maximize the number of ship blocks and ship sections ... [more ▼]

This paper presents new developments to link OptiView and a Discrete Event production Simulation (DES) software. The OptiView Software, is designed to maximize the number of ship blocks and ship sections produced in workshops during a certain time window. We decided to combine the strong points of both, the OptiView software and the DES simulation. Indeed, the production simulation is very effective for the modelling of the movement of the gantry crane while OptiView is very powerful for the allocation of blocks and optimization of the surface. This tool was developed to support planners to improve the space utilization and workshop productivity. The combination of both methods will deliver better results for lead time and cost. [less ▲]

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