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See detailOutlier identification of differential item functioning in multiple groups
Magis, David ULg; De Boeck, Paul

Conference (2010, July)

Differential item functioning (DIF) has received increasing focus in the past decades. Recently, Magis and De Boeck (2009) proposed to identify differentially functioning items as outliers in a one ... [more ▼]

Differential item functioning (DIF) has received increasing focus in the past decades. Recently, Magis and De Boeck (2009) proposed to identify differentially functioning items as outliers in a one-dimensional space of DIF measures, using robust statistical tools for outlier identification. The purpose of this talk is to present an extension of this approach for the case of more than one focal group. In this multiple group framework, items can be characterized by multiple vectors of DIF measures, one for each focal group, so that a multivariate DIF space is obtained. DIF items can then be identified as outliers in this multivariate space, based on robust multivariate estimators of location and dispersion. The MCD (Minimum Covariance Determinant) estimator is shown to be adequate for this purpose. A major asset of the method that it can rely on existing DIF indices to define the DIF vectors, and that it does not need a purification step. Alternatively, it can be used to determine on an anchor set. The method will be illustrated by an example about calculator effects on mathematics test items. [less ▲]

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See detailAn outline of a regional forest inventory in Belgium
Rondeux, Jacques ULg

in Mitteilungen der Abteilung für forstliche Biometrie (1985)

This paper outlines the first forest inventory recently carried out in the Southern part of Belgium (Wallonia) where the forests cover about 530.000 hectares (or 33 % of the regional area). The main ... [more ▼]

This paper outlines the first forest inventory recently carried out in the Southern part of Belgium (Wallonia) where the forests cover about 530.000 hectares (or 33 % of the regional area). The main objective was to estimate the standing volume of timber in the present conditions and to give, quickly, information dealing with the areas occupied according to different classifications. The inventory system used is based on temporary systematic sampling with an intensity of one plot per 50 hectares. [less ▲]

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See detailOutlook of non operated type B aortic dissection with special reference to the incidence of degenerative abdominal aortic aneurysm (AAA). One center study
Quaniers, Janine ULg; CREEMERS, Etienne ULg; Limet, Raymond ULg

in Acta Chirurgica Belgica (2005), 105(5), 487-490

Objectives : to determine the value of pharmacological treatment of type B aortic dissection (B AD) in face of new forms of treatment. Design : this is a retrospective study of the period from 1990 to ... [more ▼]

Objectives : to determine the value of pharmacological treatment of type B aortic dissection (B AD) in face of new forms of treatment. Design : this is a retrospective study of the period from 1990 to 2000. Files of 81 patients have been reviewed and completed by questionnaires. Results Two B AD died after admission without any treatment, 10 were operated on with 7 discharged alive (group 1) 69 received hypotensive agents and beta-blockers, 65 were discharged alive (group 11). Late mortality of the group I is 3/7, not related with B AD. Late mortality after mean follow-up of 56.8 months is 27/65 with 4/27 related to B AD (4 ruptures, 2 operated on). Non fatal secondary surgery amounts 5 in 4 patients. Total B AD aortic events comprise 8/65 patients. Type A AD were operated on successfully (8 : 4 before B AD, and 4 after B AD). Degenerative abdominal aortic aneurysms were present, operated (9) or not (3), in the history of patients and 3 more appear subsequently. At 10 years, actuarial survival is 40% +/- 18. Conclusion : in non-complicated cases of B AD, medical treatment is a reasonable choice, provided that a strict follow-up of the thoracic abdominal aorta is performed. [less ▲]

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See detailOutpatient and home parenteral antibiotic therapy (OHPAT) in low-risk febrile neutropenia: consensus statement of a Belgian panel.
Beguin, Yves ULg; Benoit, Yves; Crokaert, F. et al

in Acta Clinica Belgica (2002), 57(6), 309-16

Febrile neutropenia requires adequate antibiotic treatment. A subgroup of patients are only at low risk for complications and could be treated at home/as outpatients (OHPAT) after a short initial ... [more ▼]

Febrile neutropenia requires adequate antibiotic treatment. A subgroup of patients are only at low risk for complications and could be treated at home/as outpatients (OHPAT) after a short initial admission for work up. This position paper by a Belgian panel of experts presents criteria defining low-risk in febrile neutropenia, gives an overview of the existing experience and examines the present obstacles to a more widespread use of OHPAT in this country. [less ▲]

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See detailOutplacement adequacy and benefits: The mediating role of retrospective justice
Marzucco, Laurence ULg; Hansez, Isabelle ULg

Poster (2014, May)

ABSTRACT We examined the relationships between perceived outplacement adequacy, retrospective justice and outplacement benefits for redundant employees using outplacement services. Based on an ... [more ▼]

ABSTRACT We examined the relationships between perceived outplacement adequacy, retrospective justice and outplacement benefits for redundant employees using outplacement services. Based on an outplacement experience perceived as adequate, victims formed retrospective justice perceptions about their former organization that in turn, impacted their negative emotions, well-being, future perspectives and job search. PRESS PARAGRAPH The increasing prevalence of organizational downsizing has been matched by growth in the provision of outplacement services over the last decade. Despite this rapid growth and ongoing need for outplacement services, little is yet known about the perceived adequacy and the benefits of these services for redundant employees using them. Our results indicated that an outplacement experience perceived as adequate for redundant employees retrospectively fosters their impressions of justice about the dismissing organization; this leads in turn to satisfactory benefits for them: reduction of negative emotions, enhancement of their perceived well-being, future perspectives, and job-seeking activities. [less ▲]

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See detailOutput-only modal analysis using blind source separation techniques
Poncelet, Fabien ULg; Kerschen, Gaëtan ULg; Golinval, Jean-Claude ULg et al

in Mechanical Systems & Signal Processing (2007), 21(6), 2335-2358

The present study carries out output-only modal analysis using two blind source separation (BSS) techniques, namely independent component analysis and second-order blind identification. The concept of ... [more ▼]

The present study carries out output-only modal analysis using two blind source separation (BSS) techniques, namely independent component analysis and second-order blind identification. The concept of virtual source is exploited and renders the application of these BSS techniques possible. The proposed modal analysis method is illustrated using numerical and experimental examples. (c) 2007 Elsevier Ltd. All rights reserved. [less ▲]

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See detailAn outreach experience
Nazé, Yaël ULg

in European Planetary Science Congress 2006 (2006)

In our technological world, Science is everywhere and to participate to the public debates, citizens will need some basic scientific notions. Raising awareness of the public in Science is thus always ... [more ▼]

In our technological world, Science is everywhere and to participate to the public debates, citizens will need some basic scientific notions. Raising awareness of the public in Science is thus always worthwhile, even though only a small fraction of the audience will envisage a career in the field. Bringing science to the layman should even be a duty for scientists: we should not forget that we are paid by taxpayers, and are part of a public service; and besides, people tend to reject things that they do not understand - to get support, scientists need to enter the public arena and confront the crowd. Relying on attractive images and a timeless fascination, astronomy is particularly suited to do that. But what should a willing astronomer do to share (his/her) knowledge? There is certainly no definitive answer for that, but a few hints can still be given. Based on personal experience, this talk will present a few tips and things to avoid in three cases: animations (for kids and grown-ups), writing, and talking. [less ▲]

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See detailOutreach goals of the Europa Jupiter System Mission
Blanc, M.; Coustenis; Nazé, Yaël ULg et al

Poster (2009)

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See detailLes outsiders, ou le retour de la norme : à propos des Goncourt francophones
Provenzano, François ULg

in Discours social (2008), XXX

Detailed reference viewed: 19 (1 ULg)
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See detailOutskirts Dynamics and new Residential Developments in Belgium. A comparative Analysis with the Swiss and Danish Contexts
Halleux, Jean-Marie ULg

in Franzen, M.; Halleux, Jean-Marie (Eds.) European Cities, Insight on Outskirts. Dynamics (2004)

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See detailOutskirts Dynamics: towards Order or Chaos ?
Franzen, M.; Halleux, Jean-Marie ULg

in Franzen, M.; Halleux, Jean-Marie (Eds.) European Cities, Insight on Outskirts. Dynamics (2004)

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See detailOutskirts, Accessibility and Chain Reactions within the Urban Field. The Dynamics of the Released Mobility
Halleux, Jean-Marie ULg

in Franzen, M.; Halleux, Jean-Marie (Eds.) European Cities, Insight on Outskirts. Dynamics (2004)

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See detailThe outsourcing or internalisation of activities in apiaries in Romania
Bodescu, Dan; Stefan, Gavril; Magdici, Maria et al

in Scientific Papers. Series Management, Economic, Engineering in Agriculture and Rural Development (2010), 10(3), 53-57

The research presented has been the result of the necessity of the growing performances of apiaries in Romania on the basis of increasing the level of fructification of the used resources. The most ... [more ▼]

The research presented has been the result of the necessity of the growing performances of apiaries in Romania on the basis of increasing the level of fructification of the used resources. The most important activities that may be subject to the outsourcing process are: honey extraction, transport, the primary processing of apiarian products, packaging, bottling and labeling, marketing of bee products, financial-accounting records, the analysis the technical-economic projection, juridical assistance, promotion of apiarian products and services. The fructification of the mobility of certain activities in apiaries can be achieved by the following steps: the quantification of the level of usage of the available resources in the exploitation, the identification of alternatives to their own activities and the comparison of costs of alternatives with those of their own activities. [less ▲]

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See detailThe outstanding photometric variations of the Ap star HD 7676 = VV Scl
Renson, Pierre ULg; Manfroid, Jean ULg

in Astronomy and Astrophysics (1992), 263

Contrary to what was formerly believed, VV Scl is not an eclipsing star but an Alpha CVn type variable with period P = 5.0976 +/- 0.0001 d. The range of the luminosity variation is remarkably large for an ... [more ▼]

Contrary to what was formerly believed, VV Scl is not an eclipsing star but an Alpha CVn type variable with period P = 5.0976 +/- 0.0001 d. The range of the luminosity variation is remarkably large for an Ap star, especially in B of Johnson's system, and in b and mostly in v of Stromgren's one. A secondary minimum appears near the maximum in B, b, an v. The main minima are in phase in all colors. [less ▲]

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See detailOuverture au colloque "Art et Institutions en Belgique"
Bawin, Julie ULg

Speech (2008)

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See detailL’Ouverture de cuisine de Lancelot de Casteau, une histoire si incroyable ?
Adam, Renaud ULg

in Leclercq, Pierre (Ed.) La joyeuse entrée du prince-évêque de Liège Robert de Berghes. Le 12 décembre 1557, une journée solennelle ponctuée par un somptueux banquet (2009)

Detailed reference viewed: 8 (0 ULg)
See detailOuverture des châsses des saints Domitien & Mengold au Trésor de Notre-Dame de Huy
George, Philippe ULg; charlier, christine

in Annales du Cercle Hutois des Sciences et Beaux-Arts (1982), XXXVI

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See detailL'ouverture des écoles de musique à un nombre croissant d'élèves et les transformations de l'enseignement musical en Communauté française de Belgique
Giot, Bernadette ULg; Baye, Ariane ULg

in Evaluation entre équité et efficacité : actes du XVIe colloque international de l'Admée-Europe, Liège, 4-6 septembre 2003 (2004)

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See detailOuverture du colloque " L’art à l’épreuve du marché"
Bawin, Julie ULg

Speech (2008)

Detailed reference viewed: 9 (0 ULg)
See detailOuverture du colloque "Art actuel et Installation"
Bawin, Julie ULg

Speech (2009)

Detailed reference viewed: 7 (2 ULg)