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Peer Reviewed
See detailMulticentric evaluation of turbimetric myoglobin immunoassay
Lammers, M.; Chapelle, Jean-Paul ULg; Delanghe, J. et al

in Scandinavian Journal of Clinical and Laboratory Investigation. Supplementum (1992), 52(221), 109

Detailed reference viewed: 9 (1 ULg)
See detailMulticité. Le jeu du développement urbain
Beckers, Jacqueline ULg; Demeuse, Yves; Merenne-Schoumaker, Bernadette ULg et al

in G.E.O. (1997), 41(Numéro spécial),

Une équipe municipale doit définir le devenir de sa cité et gérer une série de projets (écoles, multiplex, logements sociaux, parcs industriels) avec comme consigne la minimisation des coûts pour la ... [more ▼]

Une équipe municipale doit définir le devenir de sa cité et gérer une série de projets (écoles, multiplex, logements sociaux, parcs industriels) avec comme consigne la minimisation des coûts pour la maximisation des retombées pour la collectivité ; elle fait appel à des bureaux d’études qui doivent monter ces projets. Le jeu se joue sur un territoire (plateau de jeu) avec ses quartiers d’habitat, son centre, ses réseaux de communication et aussi 350 îlots colorés selon l’affectation du sol et leur statut (public et privé). Le jeu – qui se déroule aussi sur deux fois 50 minutes dans sa version courte (un projet) – permet d’abord à l’équipe municipale de définir ses critères de choix et aux bureaux d’étude de monter leur projet, il met ensuite les protagonistes en contact puis en débat avant le choix final. Outre le plateau figurant le territoire, le jeu comprend encore des fiches relatives aux équipements, des consignes particulières pour les membres du bureau d’études et de l’équipe municipale (dont une fiche budget et une fiche argumentaire). À l’issue du jeu, il est possible non seulement de mettre en évidence les facteurs de localisation des équipements mais également le jeu des acteurs et les contraintes d’une politique de développement communal. [less ▲]

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See detailMulticlass classification of FDG PET scans for the distinction between Parkinson's disease and atypical parkinsonian syndromes
Garraux, Gaëtan ULg; Phillips, Christophe ULg; Schrouff, Jessica ULg et al

in NeuroImage: Clinical (2013), 2

Most available pattern recognition methods in neuroimaging address binary classification problems. Here, we used relevance vector machine (RVM) in combination with booststrap resampling (‘bagging’) for ... [more ▼]

Most available pattern recognition methods in neuroimaging address binary classification problems. Here, we used relevance vector machine (RVM) in combination with booststrap resampling (‘bagging’) for non-hierarchical multiclass classification. The method was tested on 120 cerebral 18fluorodeoxyglucose (FDG) positron emission tomography (PET) scans performed in patients who exhibited parkinsonian clinical features for 3.5 years on average but that were outside the prevailing perception for Parkinson's disease (PD). A radiological diagnosis of PD was suggested for 30 patients at the time of PET imaging. However, at follow-up several years after PET imaging, 42 of them finally received a clinical diagnosis of PD. The remaining 78 APS patients were diagnosed with multiple system atrophy (MSA, N = 31), progressive supranuclear palsy (PSP, N = 26) and corticobasal syndrome (CBS, N = 21), respectively. With respect to this standard of truth, classification sensitivity, specificity, positive and negative predictive values for PD were 93% 83% 75% and 96%, respectively using binary RVM (PD vs. APS) and 90%, 87%, 79% and 94%, respectively, using multiclass RVM (PD vs. MSA vs. PSP vs. CBS). Multiclass RVM achieved 45%, 55% and 62% classification accuracy for, MSA, PSP and CBS, respectively. Finally, a majority confidence ratio was computed for each scan on the basis of class pairs that were the most frequently assigned by RVM. Altogether, the results suggest that automatic multiclass RVM classification of FDG PET scans achieves adequate performance for the early differentiation between PD and APS on the basis of cerebral FDG uptake patterns when the clinical diagnosis is felt uncertain. This approach cannot be recommended yet as an aid for distinction between the three APS classes under consideration. [less ▲]

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See detailMulticollinearity
Van Steen, Kristel ULg; Molenberghs, G.

in Chow (Ed.) Encyclopedia of Biopharmaceutical Statistics (2010)

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See detailMulticollinearity
Van Steen, Kristel ULg; Molenberghs, G.

in Chow, Shein-Chung (Ed.) Encyclopedia of Biopharmaceutical Statistics (2004)

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See detailMulticollinearity in prognostic factor analyses using the EORTC QLQ-C30: identification and impact on model selection
Van Steen, Kristel ULg; Curran, D.; Kramer, J. et al

in Statistics in Medicine (2002), 21(24), 3865-3884

Clinical and quality of life (QL) variables from an EORTC clinical trial of first line chemotherapy in advanced breast cancer were used in a prognostic factor analysis of survival and response to ... [more ▼]

Clinical and quality of life (QL) variables from an EORTC clinical trial of first line chemotherapy in advanced breast cancer were used in a prognostic factor analysis of survival and response to chemotherapy. For response, different final multivariate models were obtained from forward and backward selection methods, suggesting a disconcerting instability. Quality of life was measured using the EORTC QLQ-C30 questionnaire completed by patients. Subscales on the questionnaire are known to be highly correlated, and therefore it was hypothesized that multicollinearity contributed to model instability. A correlation matrix indicated that global QL was highly correlated with 7 out of 11 variables. In a first attempt to explore multicollinearity, we used global QL as dependent variable in a regression model with other QL subscales as predictors. Afterwards, standard diagnostic tests for multicollinearity were performed. An exploratory principal components analysis and factor analysis of the QL subscales identified at most three important components and indicated that inclusion of global QL made minimal difference to the loadings on each component. suggesting that it is redundant in the model, In a second approach, we advocate a bootstrap technique to assess the stability of the models. Based on these analyses and since global QL exacerbates problems of multicollinearity, we therefore recommend that global QL be excluded from prognostic factor analyses using the QLQ-C30. The prognostic factor analysis was rerun without global QL in the model, and selected the same significant prognostic factors as before. Copyright (C) 2002 John Wiley Sons, Ltd. [less ▲]

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See detailThe Multicoloured Asian Ladybird, invasive or not in agroecosystems ?
Vandereycken, Axel ULg; Durieux, Delphine ULg; Fassotte, Bérénice ULg et al

Poster (2013, September 10)

The Multicoloured Asian Ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae) is known to thrive principally in shrubby and arboreal habitats. Its occurrence in agroecosystems remains poorly ... [more ▼]

The Multicoloured Asian Ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae) is known to thrive principally in shrubby and arboreal habitats. Its occurrence in agroecosystems remains poorly documented. This study focuses on the occurrence of this exotic species and its seasonal abundance in various field crops. The abundance of adults and larvae of H. axyridis was evaluated over a four-year period, from 2009 to 2012, in four important agronomical crops (wheat, corn, broad bean and potato) in Belgium. A total of 28 aphid predator species were observed including 14 coccinellid species, 13 hoverfly species and one lacewing species. H. axyridis is present and reproduces in all of the four crops studied, with the largest numbers recorded in corn and broad bean crops. In corn, H. axyridis numbers were found to increase over the four inventoried year, reaching 86% of the aphid predators in 2012, while it represented only 15% in 2009. H. axyridis was not always recorded where aphids were abundant, e.g. aphids were abundant on wheat where no H. axyridis were recorded. H. axyridis starts reproducing after the peak in aphid population, suggesting that H. axyridis is able to complete its development by feeding on alternative prey such as larvae and pupae of the same and other species of ladybird and other aphidophagous species. H. axyridis is often considered to be bivoltine but it only completes one generation per year in field crops. The second generation generally develops late in the season in other habitats. Harmonia axyridis is an invasive and an intraguild predator present in high quantities in some specific crops. In these crops, H. axyridis could negatively impact on population of native species due to IGP observed in several other studies. [less ▲]

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See detailMulticompartment micelles from blends of terpolymers
Gohy, Jean-François; Lefèvre, Nathalie ULg; D'haese, Cécile et al

in Polymer Chemistry (2011), 2(2), 328-332

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See detailA multicomponent exploration of verbal short-term storage deficits in normal aging and Alzheimer’s disease
Peters, Frédéric; Majerus, Steve ULg; Olivier, Laurence et al

in Journal of Clinical & Experimental Neuropsychology (2007), 29(4), 405-417

Although many studies have shown diminished performance in verbal short-term memory tasks in normal aging and Alzheimer's disease (AD), the cognitive processes responsible for this verbal short-term ... [more ▼]

Although many studies have shown diminished performance in verbal short-term memory tasks in normal aging and Alzheimer's disease (AD), the cognitive processes responsible for this verbal short-term storage (STS) impairment are still unclear for both populations. We explored verbal STS functioning in patients with AD, elderly participants, and young participants, by investigating a series of processes that could underlie STS impairments in normal elderly and AD populations. The processes we investigated were (a) the influence of lexical and sublexical language knowledge on short-term storage performance, (b) functioning of the phonological loop component via word length and phonological similarity effects, and (c) executive control processes (coordination and integration). For the AD and elderly groups, the influence of language knowledge on verbal STS performance and the functioning of the phonological loop were preserved. In contrast, the AD group showed deficits for coordination and integration processes. Our results suggest that the verbal STS deficit observed in AD patients is related to impaired executive control processes. On the other hand, language-related processes underlying passive storage capacity seem to be preserved. [less ▲]

Detailed reference viewed: 59 (9 ULg)
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See detailMulticomponent reactive modelling of ammonium contamination at a former coal carbonisation plant
Haerens, B.; Dassargues, Alain ULg; Prommer, H. et al

in Aardkundige Mededelingen (2002), 12

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See detailMulticonfiguration Dirac-Fock wavelengths and transition rates in the X-ray spectra of highly charged Ga-like ions from Yb39+ to U61+
Quinet, Pascal ULg; Biémont, Emile ULg; Palmeri, P. et al

in Atomic Data and Nuclear Data Tables (2007), 93(1), 167-182

A multiconfiguration Dirac-Fock (MCDF) technique has been used for computing the wavelengths and transition probabilities for lines in the X-ray spectra of the gallium-like ions from Yb XL to U LXII ... [more ▼]

A multiconfiguration Dirac-Fock (MCDF) technique has been used for computing the wavelengths and transition probabilities for lines in the X-ray spectra of the gallium-like ions from Yb XL to U LXII. Results are presented for the 4s(2)4p-4s(2)4d and 4s(2)4p-4s4p(2) allowed transitions (E1) as well as for the forbidden transitions (M1 and E2) within the ground configuration 4s(2)4p. A comparison of the calculated wavelengths with the few experimental results available is also presented. (c) 2006 Elsevier Inc. All rights reserved. [less ▲]

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See detailMulticriteria and multiactors aspects of an interactive tool aiding to sketch the building envelope during the first stages of the architectural design
Hauglustaine, Jean-Marie ULg

Conference (2000, October)

The main objective of the present study is to introduce a rational method of aiding to design the envelope of a building, during the sketch design. The design method has for both objectives the respect of ... [more ▼]

The main objective of the present study is to introduce a rational method of aiding to design the envelope of a building, during the sketch design. The design method has for both objectives the respect of building costs (for the construction itself and in use), and the improvement of the energy performance. In the multicriteria and multiactors context, this interactive tool is using decision-making aids, in order to improve the architectural response to the client’s and regulations requirements, while aiding: - the project authors in their conception tasks, by making up the project architectural forces, in accordance with the actors’ objectives; - and the client in his participation in the multiple partners negotiation. [less ▲]

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See detailMulticriteria and multiactors interactive tool aiding to sketch the building envelope during the first stages of the architectural design, with objective of cost and energy performances
Hauglustaine, Jean-Marie ULg

in Performance of Exterior Envelopes of Whole Buildings VIII: Integration of Building Envelopes (2001, December)

The present study explores a Multiple Criteria Decision Aid (MCDA) procedure, an aid to help project authors optimise the building envelope during the sketch design, where a significant number of choices ... [more ▼]

The present study explores a Multiple Criteria Decision Aid (MCDA) procedure, an aid to help project authors optimise the building envelope during the sketch design, where a significant number of choices are fixed, having a determining impact on the future building cost and use. The objective of the design method is the respect of building costs – for the building construction and use – and the energy performance improvement. An interactive tool has been developed within multicriteria and multiactors context. In order to improve the architectural response to the client’s and regulation requirements, it gives decision-making aids to: - the project authors: in making up the project architectural forces, in accordance with the actors’ objectives; - the client: in reaching his objectives of costs, building duration, comfort and functionality, while serenely assuming his responsibilities related to his building energy and environment performances. The design tool is organised in two linked modules, any actor may go in any module in any time: - the first one manages parameters describing the project requirements; - the graphic module allows to draw the sketch; it calculates geometric parameter values that it puts back in the first module. Permanently informed on cost and energy performances, the user can any time search for optimal scenario giving best satisfaction or compromise: he has at his disposal at lot of graphs illustrating the performance sensitivity to parameter variation, as well as an optimisation procedure using a genetic algorithm to find the most efficient parameter set. The software is organised to manage new building projects of housings, schools and offices (small to medium size projects). [less ▲]

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See detailMulticriteria and Multiple Actors Tool Aiding to Optimise Building Envelope at the Architectural Sketch Design
Hauglustaine, Jean-Marie ULg; Azar, Sleiman

in Informatica (2001), 12(1), 3-24

The PC software AMCE is proposing building actors (owner, project authors… ) a Multiple Criteria Decision Aid procedure (MCDA) to optimise the building envelope about cost and energy performances, during ... [more ▼]

The PC software AMCE is proposing building actors (owner, project authors… ) a Multiple Criteria Decision Aid procedure (MCDA) to optimise the building envelope about cost and energy performances, during the sketch design. Two main modules are linked, where the user interactively goes: - the first one managers parameters describing the project requirements; - the graphic pen-based module allows to draw the sketch; it calculates geometric parameter values and put them back in the first module. Permanently informed on foreseeable performances, the user can any time search for optimal scenario giving best satisfaction (manoactor optimisation) or most preferred compromise (multiactors optimisation). [less ▲]

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See detailMulticriterion Scantling Optimization of the Midship Section of a Passenger Vessel considering IACS Requirements
Richir, Thomas; Caprace, Jean-David ULg; Losseau, Nicolas ULg et al

in The 10th International Symposium on Practical Design of Ships and Other Floating Structures (PRADS) (2007, October)

In the scantling design of a passenger ship, minimum production cost, minimum weight and maximum moment of inertia (stiffness) are conflicting objectives. For that purpose, recent improvements were made ... [more ▼]

In the scantling design of a passenger ship, minimum production cost, minimum weight and maximum moment of inertia (stiffness) are conflicting objectives. For that purpose, recent improvements were made to the LBR-5 software (French acronym of “Stiffened Panels Software”, version 5.0) to optimize the scantling of ship sections by considering production cost, weight and moment of inertia in the optimization objective function. Moreover, IACS requirements regarding bending, shearing and buckling strength are currently available in LBR-5. Until now, only raw scantling optimizations were performed with LBR-5. Thanks to new developments using heuristics, it is now possible to realize discrete optimization so that a standardized and “ready to use” set of optimum scantlings can be obtained. [less ▲]

Detailed reference viewed: 293 (50 ULg)
See detailMulticultural Policies and the State : a comparison of two European societies
Martiniello, Marco ULg

Book published by Ercomer (1998)

Detailed reference viewed: 50 (2 ULg)