Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailCollaboration industrielle et enseignement par projet en électronique de puissance
Plumier, Frédéric ULg; Bleus, Paul; Geuzaine, Christophe ULg

in J3eA : Journal sur l'Enseignement des Sciences et Technologies de l'Information et des Systèmes (2009), 8(Hors série 1), 1015

For the first time during year 2007-2008, a complete design of a DC/DC converter, based on specifications only, was asked to the students following the basic Power Electronics course at University of ... [more ▼]

For the first time during year 2007-2008, a complete design of a DC/DC converter, based on specifications only, was asked to the students following the basic Power Electronics course at University of Liège. This very realistic pedagogical way of teaching helped the students to be autonomous, to learn project and team work. [less ▲]

Detailed reference viewed: 118 (34 ULg)
Full Text
See detailCollaboration Patrimoine-Logement
Frankignoulle, Pierre ULg

in 1850-1950 : un siècle d'architecture moderne (1999)

Detailed reference viewed: 13 (2 ULg)
Full Text
Peer Reviewed
See detailCollaborations distantes synchrones dans les pratiques de conception
Ben Rajeb, Samia ULg; Leclercq, Pierre ULg

in International Journal of Design Sciences and Technology (2013, January)

Cet article propose une analyse des pratiques de la collaboration architecturale dans des situations de travail distantes. Il s'intéresse en particulier à la mise en oeuvre d'outils pour le travail ... [more ▼]

Cet article propose une analyse des pratiques de la collaboration architecturale dans des situations de travail distantes. Il s'intéresse en particulier à la mise en oeuvre d'outils pour le travail synchrones dans les agences d'architecture. Il s'appuie sur l'observations in situ de trois situations qui illustrent successivement différents modes d'interaction : nous analyserons ainsi l'usage de la visioconférence, de l'écran partagé puis du studio distant collaboratif. Pour identifier quels rôles peuvent assurer ces différents outils numériques, notre méthodologie s'appuiera sur la catégorisation proposée par les concepts architecturologiques, décrivant les opérations de conception architecturale, complétées des opérations pragmatiques de collaboration. Une grille évaluative des opérations supportées respectivement par ces trois technologies identifiera leurs limitations, atouts et conditions d'opérabilité, permettant ainsi d'apprécier la mise en oeuvre actuelle et future des technologies collaboratives en agence d'architecture. [less ▲]

Detailed reference viewed: 102 (39 ULg)
See detailCollaborations et conventions entre le secteur privé et le secteur public dans le domaine de l'aide sociale
Gavray, Claire ULg

Book published by Fédération des Initiatives d'Aide Sociale (1981)

Detailed reference viewed: 10 (1 ULg)
Full Text
Peer Reviewed
See detailCollaborative care in the addiction management of alcohol, illicit drugs and hypnotics and tranquilizers in the Belgian working population
Van Royen, Kathleen; Remmen, Roy; Vanmeerbeek, Marc ULg et al

Poster (2012, October)

Background: General practitioners (GPs) and occupational physicians (OPs) play an important role in detecting and managing substance abuse in the working population. Their collaboration is critical in ... [more ▼]

Background: General practitioners (GPs) and occupational physicians (OPs) play an important role in detecting and managing substance abuse in the working population. Their collaboration is critical in coordinating care, facilitate a quicker rehabilitation and shorten sickleave. A systematic literature search was performed according to the ADAPTE-framework to explore if guidelines exist for collaboration between GPs and OPs in substance abuse management. Method: International guidelines regarding collaborative care for alcohol abuse, illicit drug use and hypnotics and tranquilizers were identified by a detailed systematic search in the Guidelines International Network (GIN) and US National Guidelines Clearinghouse (NGC) databases. Results: In total 20 guidelines were considered of sufficient methodological quality, based on criteria of the Appraisal of Guidelines for Research and Education (AGREE) II instrument. Two out of 20 eligible guidelines reported on the role of OPs. There is a lack of adequate evidence on the role of the OP in substance abuse management. No practical avenues for collaboration between GPs and OPs in the management of substance abuse were suggested. Conclusions: In order to ensure adequate substance abuse management, collaborative models for general practice and occupational health should be developed. We recommend to study pros and cons for collaboration as well as the best way to achieve it. [less ▲]

Detailed reference viewed: 42 (7 ULg)
Full Text
See detailCollaborative filtering: Scalable approaches using restricted Boltzmann machines
Louppe, Gilles ULg

Master's dissertation (2010)

Parallel to the growth of electronic commerce, recommender systems have become a very active area of research, both in the industry and in the academic world. The goal of these systems is to make ... [more ▼]

Parallel to the growth of electronic commerce, recommender systems have become a very active area of research, both in the industry and in the academic world. The goal of these systems is to make automatic but personal recommendations when customers are overwhelmed with thousands of possibilities and do not know what to look for. In that context, the object of this work is threefold. The first part consists in a survey of recommendation algorithms and emphasizes on a class of algorithms known as collaborative filtering algorithms. The second part consists in studying in more depth a specific model of neural networks known as restricted Boltzmann machines. That model is then experimentaly and extensively examined on a recommendation problem. The third part of this work focuses on how restricted Boltzmann machines can be made more scalable. Three different and original approaches are proposed and studied. In the first approach, we revisit the learning and test algorithms of restricted Boltzmann machines in the context of shared-memory architectures. In the second approach, we propose to reformulate these algorithms as MapReduce tasks. Finally, in the third method, ensemble of RBMs are investigated. The best and the more promising results are obtained with the MapReduce approach. [less ▲]

Detailed reference viewed: 815 (80 ULg)
Full Text
Peer Reviewed
See detailA collaborative framework for multi-area dynamic security assessment of large scale systems
Wehenkel, Louis ULg; Glavic, Mevludin; Ernst, Damien ULg

in Proceedings of the 2007 Power Tech (2007)

In this paper we propose a collaborative framework to carry out multi-area dynamic security assessment over an interconnection operated by a team of TSOs responsible of different areas. In this framework ... [more ▼]

In this paper we propose a collaborative framework to carry out multi-area dynamic security assessment over an interconnection operated by a team of TSOs responsible of different areas. In this framework each TSO does his part of the work and, thanks to information exchange and coordination rules, potential security problems can be detected by all the involved TSOs. We find that distributed multi-area security assessment is achievable and useful if, on the one hand, each TSO can provide an appropriate dynamic equivalent model of his area and if, on the other hand, he is able to publish stability bounds on his inflows under which the dynamic performance of his system would remain acceptable. We then discuss the notions of dynamic equivalent model and external stability domain characterization of an area and identify techniques for deriving such equivalents and stability bounds within the proposed framework. [less ▲]

Detailed reference viewed: 29 (2 ULg)
Full Text
Peer Reviewed
See detailCollaborative learning in a virtual campus : allowing future teachers live what their future learners could live about technologies and education
Denis, Brigitte ULg

in 9th European conference EARLI Bridging instruction to learning, University of Friburg - August 28-September 1, 2001 (2001, August)

This paper presents a European project called Socrates LEARN-NETT1 based on a distance collaborative learning realised with the help of a virtual campus. This one offers functions facilitating the ... [more ▼]

This paper presents a European project called Socrates LEARN-NETT1 based on a distance collaborative learning realised with the help of a virtual campus. This one offers functions facilitating the navigation inside the campus, giving access to some information related to the LEARN-NETT community (students, tutors, groupworks, news, etc), regulation and management of collaborative work, communication tools, sharing of resources, … [less ▲]

Detailed reference viewed: 19 (4 ULg)
Peer Reviewed
See detailCollaborative learning in an educational robotics environment
Denis, Brigitte ULg; Hubert, Sylviane

in Computer in Human Behavior (2001), 17(5-6), 465-480

Detailed reference viewed: 21 (3 ULg)
Peer Reviewed
See detailCollaborative Multi-Camera Tracking of Athletes in Team Sports
Du, Wei ULg; Hayet, Jean-Bernard; Piater, Justus ULg et al

in Workshop on Computer Vision Based Analysis in Sport Environments (CVBASE) (2006)

Detailed reference viewed: 28 (3 ULg)
Full Text
Peer Reviewed
See detailCollaborative study of an liquid chromatographic method for the determination of R-timolol and other related substances in S-timolol maleate
Marini, R. D.; Matthijs, N.; Vanderheyden, Yvan et al

in Analytica Chimica Acta (2005), 546(2), 182-192

A collaborative study applying an enantiomeric liquid chromatographic (LC) method was carried out to determine the content of the enantiomeric impurity R-timolol and other related substances in three ... [more ▼]

A collaborative study applying an enantiomeric liquid chromatographic (LC) method was carried out to determine the content of the enantiomeric impurity R-timolol and other related substances in three different S-timolol maleate samples. Eight laboratories, all located in Europe, participated in the study. The quantitative results obtained were used to estimate the uncertainty on the content of the different impurities. For that purpose, a set-up was adapted from the ISO guidelines 5725-2, which allowed the estimation of the different variances, i.e. the between-laboratories (s(laboratories)(2)), the between-days (s(days)(2)) and the between-replicates (s(replicates)(2)), The variances of repeatability (s(r)(2)) and reproducibility (s(R)(2)) were then calculated using the equations s(r)(2) = s(replicates)(2) and s(R)(2) = s(replicates)(2) + s(days)(2) + s(laboratories)(2). For the timolol impurities, it was found that the estimated uncertainty seem to be concentration-dependent. Since the LC method which combines the compendial ones for enantiomeric purity and related substances testing was applied to evaluate uncertainty in this collaborative study, it was shown how a laboratory can evaluate the uncertainty of its results when applying the method in the future. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 19 (0 ULg)
Full Text
Peer Reviewed
See detailCollaborative study of an liquid chromatographic method for the determination of R-timolol and other related substances in S-timolol maleate
Marini Djang'Eing'A, Roland ULg; Matthijs, N.; Heyden, Y. V. et al

in Analytica Chimica Acta (2005), 546(2), 182-192

A collaborative study applying an enantiomeric liquid chromatographic (LC) method was carried out to determine the content of the enantiomeric impurity R-timolol and other related substances in three ... [more ▼]

A collaborative study applying an enantiomeric liquid chromatographic (LC) method was carried out to determine the content of the enantiomeric impurity R-timolol and other related substances in three different S-timolol maleate samples. Eight laboratories, all located in Europe, participated in the study. The quantitative results obtained were used to estimate the uncertainty on the content of the different impurities. For that purpose, a set-up was adapted from the ISO guidelines 5725-2, which allowed the estimation of the different variances, i.e. the between-laboratories (s(laboratories)(2)), the between-days (s(days)(2)) and the between-replicates (s(replicates)(2)), The variances of repeatability (s(r)(2)) and reproducibility (s(R)(2)) were then calculated using the equations s(r)(2) = s(replicates)(2) and s(R)(2) = s(replicates)(2) + s(days)(2) + s(laboratories)(2). For the timolol impurities, it was found that the estimated uncertainty seem to be concentration-dependent. Since the LC method which combines the compendial ones for enantiomeric purity and related substances testing was applied to evaluate uncertainty in this collaborative study, it was shown how a laboratory can evaluate the uncertainty of its results when applying the method in the future. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 43 (2 ULg)
Full Text
Peer Reviewed
See detailLe collage-scellement des restaurations all-ceram
Van Heusden, Alain ULg; Gueders, Audrey ULg

in Revue Belge de Médecine Dentaire = Belgisch Tijdschrift voor Tandheelkunde (2006), 61(2), 109-21

The objective of this article is to synthesize the current scientific data relating to the bonding of ceramic restorations in order to present a reliable and reproductive clinical method for the general ... [more ▼]

The objective of this article is to synthesize the current scientific data relating to the bonding of ceramic restorations in order to present a reliable and reproductive clinical method for the general practitioner. The different ceramic treatments are explained with a distinction between those which can be etched and the others. A precise check list is suggested for the conditioning of dental tissues and ceramic surfaces. [less ▲]

Detailed reference viewed: 108 (5 ULg)
Full Text
Peer Reviewed
See detailCollagen fibril arabesques in connective tissue disorders.
Hermanns-Le, Trinh ULg; Pierard, Gérald ULg

in American Journal of Clinical Dermatology (2006), 7(5), 323-6

BACKGROUND: In various connective tissue disorders, collagen fibrils and elastic fibers may exhibit some ultrastructural abnormalities. OBJECTIVE: This electron microscopy study focused on collagen fibril ... [more ▼]

BACKGROUND: In various connective tissue disorders, collagen fibrils and elastic fibers may exhibit some ultrastructural abnormalities. OBJECTIVE: This electron microscopy study focused on collagen fibril orientation and unusual shapes in the dermis of Ehlers-Danlos syndrome (EDS) and related entities, including spontaneous cervical artery dissection syndrome and recurrent preterm premature rupture of fetal membranes syndrome. RESULTS: In addition to some abnormal fibril shapes typically found in these syndromes, other conformations (hook shaped, S shaped, ring shaped) that have not been illustrated previously in the literature were observed. CONCLUSION: The abnormal collagen fibril conformations observed in EDS and other related conditions characterized by tissue fragility likely affect both the internal cohesiveness of the bundles and the mechanobiologic properties of the tissue. [less ▲]

Detailed reference viewed: 16 (1 ULg)
Full Text
Peer Reviewed
See detailCollagen fibril disruption occurs early in primary guinea pig knee osteoarthritis.
Huebner, J. L.; Williams, J. M.; Deberg, Michelle ULg et al

in Osteoarthritis and Cartilage (2010), 18(3), 397-405

OBJECTIVE: A major barrier inhibiting the discovery of structural modifying agents for osteoarthritis (OA) is an incomplete understanding of early disease events. Herein, we investigated the time course ... [more ▼]

OBJECTIVE: A major barrier inhibiting the discovery of structural modifying agents for osteoarthritis (OA) is an incomplete understanding of early disease events. Herein, we investigated the time course of collagen II cleavage and fibril disruption in the well-validated Hartley guinea pig model of spontaneous OA of the knee. METHODS: Knee joints of 46 male Hartley guinea pigs were analyzed at 3 weeks, 2, 4, 7, 10, 12, and 18 months of age for histological severity of OA, cartilage collagen fibril disruption by semi-quantitative polarized light microscopy, and expression of type II collagen degradation biomarkers, 9A4 and Coll2-1, by immunohistochemistry. In addition, serum biomarkers specific for collagen II degradation, CTX-II, C2C, and Coll2-1 were quantified. RESULTS: Collagen fibril disruption and expression of the collagenase-generated cleavage neoepitope, 9A4, were observed as early as 2 months of age, despite the appearance of histological OA at 4 months of age. Only serum Coll2-1 increased coincident with the early disruption of the collagen fibril between 3 weeks and 7 months, in contrast to serum C2C, which did not change significantly or correlate with histological severity. Inversely, CTX-II declined dramatically from 3 weeks to 4 months and remaining low thereafter, coincident with growth plate turnover. CONCLUSIONS: Collagenase cleavage and disruption of the type II collagen network are early OA disease events in this model, preceding histological evidence of proteoglycan loss. The markedly different serum profiles of collagen II-related biomarkers during the early stages of disease development suggest compartmental segregation and temporal regulation of collagen degrading enzymes. [less ▲]

Detailed reference viewed: 24 (3 ULg)
Peer Reviewed
See detailCollagen heterogeneity in normal human bone marrow
Bentley, S. A.; Alabaster, O.; Foidart, Jean-Michel ULg

in British Journal of Haematology (1981), 48(2), 287-91

Paraffin embedded sections of formalin fixed, decalcified, normal, human, vertebral bone were stained immunohistochemically for collagen types I, III and IV using the peroxidase--anti-peroxidase (PAP ... [more ▼]

Paraffin embedded sections of formalin fixed, decalcified, normal, human, vertebral bone were stained immunohistochemically for collagen types I, III and IV using the peroxidase--anti-peroxidase (PAP) technique. Preparations stained for collagen types I and III were virtually identical in appearance. These substrates were localized to the cytoplasm and fibrillar processes of a population of cells which were sparsely distributed within the haemopoietic compartment of the bone marrow, being particularly prominent in relation to the marrow sinusoids and fat spaces. They would thus appear to parallel the known distributions of reticulum cells, although their morphology differed in some respects from classical descriptions of the latter cell type. Type IV collagen was found in association with the endothelial lining of the sinusoids. Other connective tissue elements (bone, periosteum, endosteum, blood vessels, etc.) showed characteristic collagen heterogeneity. These results indicate that collagen is a significant component of the bone marrow connective tissue. [less ▲]

Detailed reference viewed: 3 (0 ULg)
Peer Reviewed
See detailCollagen localization in normal and fibrotic human skeletal muscle.
Foidart, M.; Foidart, Jean-Michel ULg; Engel, W. K.

in Archives of Neurology (1981), 38(3), 152-7

The distribution of types I to IV collagen, types I and III p-N collagen, and fibronectin in human skeletal muscle was studied by immunofluorescence using purified antibodies to those proteins. In normal ... [more ▼]

The distribution of types I to IV collagen, types I and III p-N collagen, and fibronectin in human skeletal muscle was studied by immunofluorescence using purified antibodies to those proteins. In normal muscle, types I and III collagen, types I and III p-N collagen, and fibronectin were localized in the endomysium and perimysium. Type IV collagen was restricted to basement membrane. Type II collagen was not present. In Duchenne's musclar dystrophy and dermatomyositis/polymyositis (DM/PM), the prominently increased endomysial and perimysial fibrosis consisted of types I and III collagen, types I and III p-N collagen, and fibronectin. In DM/PM, thickening of the walls of perimysial venular and arteriolar vessels was associated with accumulation of types I and III collagen, types I and III p-N collagen, and fibronectin, as well as type IV collagen. There was no disease-specific accumulation of collagen, p-N collagen, or fibronectin. [less ▲]

Detailed reference viewed: 9 (0 ULg)
Peer Reviewed
See detailCollagen synthesis in cultures of differentiating neural crest cells
Greenberg, J. H.; Foidart, Jean-Michel ULg; Greene, R. M.

in Cell Differentiation (1980), 9(3), 153-63

Neural crest cells from the cranial region of chick embryos were cultured in the presence of fetal calf serum in which they differentiate into melanocytes or in the presence of horse serum in which they ... [more ▼]

Neural crest cells from the cranial region of chick embryos were cultured in the presence of fetal calf serum in which they differentiate into melanocytes or in the presence of horse serum in which they differentiate into neuron-like cells. Undifferentiated cultures, as well as pigmented and neuronal cultures, incorporated [14C]proline into types I and III collagen and into non-collagenous proteins. When cells differentiated into melanocytes, the ratio of collagen to non-collagenous protein did not change. In contrast, in cultures where a portion of the cells differentiated into neuron-like cells, the ratio of collagen to non-collagenous protein was reduced. Indirect immunofluorescence studies using specific antibodies against collagen or procollagen types I, II, III, and IV demonstrated that undifferentiated neural crest cells, melanocytes and neuron-like cells stained only with antibody to type III procollagen, while fibroblastic cells present in some cultures stained only with antibody to type I procollagen. Our results demonstrate that although the types of collagen synthesized by neural crest cells do not change with time in culture, the relative amounts of collagen may reflect the pathway of differentiation of the cells. [less ▲]

Detailed reference viewed: 5 (1 ULg)