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See detailL’osteoporosi nel nuovo millennio : la crescente domanda di risorse sanitarie
Reginster, Jean-Yves ULg

in Clinical Cases in Mineral and Bone Metabolism (2008), 5(3), 269

Detailed reference viewed: 6 (3 ULg)
See detailL'ouhê sins no
Marganne, Marie-Hélène ULg; Freson, Léon; Mélard, Marc

Book (1994)

Detailed reference viewed: 23 (3 ULg)
See detailL’UE face aux puissances émergentes
Santander, Sébastian ULg

Scientific conference (2013, December 04)

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See detailL'ULg met un TIGRE dans son moteur
Rauw, Grégor ULg; Nazé, Yaël ULg

Article for general public (2013)

Ciel (Le)

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See detailL’Union européenne et l’interrégionalisme : trajectoire, situation actuelle et perspective
Santander, Sébastian ULg

in Chabal, Pierre (Ed.) Concurrences Interrégionales Europe-Asie au 21ème siècle (in press)

Detailed reference viewed: 38 (7 ULg)
See detailL’Union européenne et la construction du régionalisme international
Santander, Sébastian ULg

Scientific conference (2009, November 20)

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See detailL'urgence aux champs
Gauthier, Jean-Marie ULg

in Actes du colloque: Le travail de la crise à l'épreuve de l'urgence (1987)

Detailed reference viewed: 7 (3 ULg)
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See detailL’usage des pigments durant le Solutréen
Salomon, Hélène ULg

in Otte, Marcel (Ed.) Le Solutréen (in press)

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See detailL'utilisation de la spectrométrie (NIR) et l’imagerie hyperspectrale (NIR-HIS) proche infrarouge pour étudier la composition chimique et botanique de des fourrages
Dale, Laura-Monica ULg

Doctoral thesis (2014)

Forage quality or nutritive value is related to chemical composition, which can be determinated by laboratory methods. The NIR technique in comparison with classical methods is non-destructive, non ... [more ▼]

Forage quality or nutritive value is related to chemical composition, which can be determinated by laboratory methods. The NIR technique in comparison with classical methods is non-destructive, non-polluting, fast and relatively inexpensive per analysis. Investigations on nutritional quality of Carpathians Apuseni Mountains (Romania) grasslands are rarely performed with NIR technique. Therefore, the objective of the thesis was to develop non-destructive methods for evaluating the quality of feed originating from the Gârda area of the Carpathians Apuseni Mountains (Romania) potentially and to similar grassland arround the world. The first task was to study the potential of NIR spectroscopy for building a spectral database for forage quality based on a large collection of semi-natural grassland samples, using a ‘local’ calibration model built by the Walloon Agricultural Research Centre (CRA-W), in Belgium, to determine various parameters (e.g., protein, dry matter, ash, fibre, fat, aNDFom, ADF, lignin, digestibility, crude energy) from samples collected worldwide, outside Romania. The second task was to develop calibration models for an NIR-HSI system, which involved larger spectral data registration as an image. Until now, analyses to determine plant species were based on botanical composition evaluation, including visual observation, which is a subjective method involving identifying plants directly in the field. Distinguishing samples of pure grassland species can be time consuming, and it was therefore decided to build a spectral database of pure samples and then discriminate these samples into binary and ternary artificial sample mixtures. The main objective of these tasks was to identify the botanical families to which the samples belonged (Poaceae, Fabaceae and Other Botanical Families [OBF]). The focus was not on quantity monitoring, but rather on determining forage quality from stationary experiments in the grasslands. To conclude, this research has shown that it is possible to develop calibration models not only for quality assessment, but also for sample discrimination in dry powder samples. It was intended, that the mathematical models constructed and the database obtained, would be used for future research. [less ▲]

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See detailL’utilisation du blé dans l’alimentation du poulet de chair en Wallonie
Piron, Fabien ULg; Wéry, Olivier; Bodson, Bernard ULg et al

Conference given outside the academic context (2007)

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See detailL’utopie Internet : du village global au huis clos planétaire ?
Durand, Pascal ULg

Article for general public (2000)

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See detailL- and V-curves for Optimal Smoothing
Frasso, Gianluca ULg; Eilers, Paul H. C.

in Statistical Modelling : An International Journal (2014)

The L-curve is a tool for the selection of the regularization parameter in ill-posed inverse problems. It is a parametric plot of the size of the residuals vs that of the penalty. The corner of the L ... [more ▼]

The L-curve is a tool for the selection of the regularization parameter in ill-posed inverse problems. It is a parametric plot of the size of the residuals vs that of the penalty. The corner of the L indicates the right amount of regularization. In the context of smoothing the L-curve is easy to compute and works surprisingly well, even for data with correlated noise. We present the theoretical background and applications to real data together with an alternative criterion for finding the corner automatically. We introduce as simplification, the V-curve, which replaces finding the corner of the L-curve by locating a minimum. [less ▲]

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See detailL-band and C-band studies of African volcanic areas
Wauthier, Christelle ULg; Oyen, A.; Marinkovic, P. et al

in Proc. of Geoscience and Remote Sensing Symposium, 2009 IEEE International, IGARSS 2009 , July 13-17 2009, Cape Town, Africa (2009)

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See detailL-surface and V-valley for optimal anisotropic 2D smoothing
Frasso, Gianluca ULg; Paul, Eilers

E-print/Working paper (2014)

We present the L-surface as an attractive generalization of the L-curve framework for the selection of the optimal smoothing parameters in two dimensional applications. It preserves the desirable features ... [more ▼]

We present the L-surface as an attractive generalization of the L-curve framework for the selection of the optimal smoothing parameters in two dimensional applications. It preserves the desirable features of its unidimensional analogous. The optimal amount of smoothing is indicated by the pair of parameters located in the point of maximum (Gaussian) curvature. Locate this point on a discrete parametric surface can be not straightforward. We introduce the V-valley as a simplified selection criterion based on distance minimization. [less ▲]

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See detailL. Jäger, "Ferdinand de Saussure zur Einführung"
Cigana, Lorenzo ULg

in Cahier Ferdinand de Saussure (2012)

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See detailThe L1 major capsid protein of HPV16 differentially modulates APC trafficking according to the vaccination or natural infection context.
Herman, Ludivine ULg; Hubert, Pascale ULg; Herfs, Michael ULg et al

in European Journal of Immunology (2010), 40(11), 3075-84

Human papillomavirus (HPV) infection, particularly type 16, is causally associated with cancer of the uterine cervix. The progression of cervical lesions suggests that viral antigens are not adequately ... [more ▼]

Human papillomavirus (HPV) infection, particularly type 16, is causally associated with cancer of the uterine cervix. The progression of cervical lesions suggests that viral antigens are not adequately presented to the immune system. The aim of this study was to determine whether HPV16 viral particles can influence the trafficking of human DC/Langerhans cells (LC), either by direct interactions with DC or following incubation with human normal keratinocytes that are in close contact with LC in the squamous epithelium. We first demonstrated that HPV16 L1 major capsid protein, when self-assembled into virus-like particles (VLP), is able to induce in DC an over-expression of CXC receptor 4 (CXCR4) via the activation of the NF-kappaB signaling pathway and to enhance DC motility in the presence of CXCL12, suggesting an ability to migrate towards lymph nodes. We also showed that conditioned media of HPV16 VLP-treated keratinocytes induce a lower LC migration than those from untreated keratinocytes and that prostaglandin E2 (PGE(2)), detected in HPV16 VLP-treated keratinocyte supernatants, may reduce LC recruitment into the squamous epithelium. Taken together, our data demonstrate that HPV16 VLP may differentially regulate the immune protective response according to their target cells. [less ▲]

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See detailL1-based compression of random forest models
Joly, Arnaud ULg; Schnitzler, François ULg; Geurts, Pierre ULg et al

in 20th European Symposium on Artificial Neural Networks (2012, April)

Random forests are effective supervised learning methods applicable to large-scale datasets. However, the space complexity of tree ensembles, in terms of their total number of nodes, is often prohibitive ... [more ▼]

Random forests are effective supervised learning methods applicable to large-scale datasets. However, the space complexity of tree ensembles, in terms of their total number of nodes, is often prohibitive, specially in the context of problems with very high-dimensional input spaces. We propose to study their compressibility by applying a L1-based regularization to the set of indicator functions defined by all their nodes. We show experimentally that preserving or even improving the model accuracy while significantly reducing its space complexity is indeed possible. [less ▲]

Detailed reference viewed: 304 (71 ULg)
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See detailL1-based compression of random forest models
Joly, Arnaud ULg; Schnitzler, François ULg; Geurts, Pierre ULg et al

in Proceeding of the 21st Belgian-Dutch Conference on Machine Learning (2012, May 24)

Random forests are effective supervised learning methods applicable to large-scale datasets. However, the space complexity of tree ensembles, in terms of their total number of nodes, is often prohibitive ... [more ▼]

Random forests are effective supervised learning methods applicable to large-scale datasets. However, the space complexity of tree ensembles, in terms of their total number of nodes, is often prohibitive, specially in the context of problems with very high-dimensional input spaces. We propose to study their compressibility by applying a L1-based regularization to the set of indicator functions defined by all their nodes. We show experimentally that preserving or even improving the model accuracy while significantly reducing its space complexity is indeed possible. [less ▲]

Detailed reference viewed: 200 (54 ULg)