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See detailL'ouhê sins no
Marganne, Marie-Hélène ULg; Freson, Léon; Mélard, Marc

Book published by Jeunes Comédiens Ruraux de Voroux-Goreux (1994)

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See detailL’ozone atmosphérique est-il vraiment en danger?
Zander, Rodolphe ULg

in Ciel et Terre (1980), 96

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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 la construction du régionalisme international
Santander, Sébastian ULg

Scientific conference (2009, November 20)

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See detailL’Union européenne et les puissances régionales au Moyen-Orient
Bayramzadeh, Kamal ULg

Conference (2013, November 29)

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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: 9 (4 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 l’hydrolyse enzymatique pour la production de nanocellulose dans une stratégie de bioraffinage forestier intégré
Bombeck, Pierre-Louis ULg; Hebert, Jacques ULg; Richel, Aurore ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2016), 20(1), 94-103

Introduction. In a world that seeks to break free from petrochemicals, the concept of forest biomass biorefinery is increasingly being studied as a way to maximize the value of the components of this ... [more ▼]

Introduction. In a world that seeks to break free from petrochemicals, the concept of forest biomass biorefinery is increasingly being studied as a way to maximize the value of the components of this biomass. Due to the high added value expected when transforming cellulose fibers into nanocellulose, this technology is highly attractive to the pulp and paper industrial world. Literature. The concept of integrated forest biorefinery is to adapt existing pulp mills so as to maximize the value of the co-products. Through the use of various methods, two types of nanocellulose may be obtained from the cellulose in the pulp. Due to its production of valuable byproducts, enzymatic hydrolysis is an interesting method to use for this purpose, but it must be combined with mechanical post-treatments. The production of nanocellulose from chemical pulp takes place in the final step of pulp production, and could be implemented without modifying the existing mills. The economic viability of this mode of production and the potential market size are the subject of recent studies that appear encouraging. Conclusions. Nanocellulose is a promising biomaterial whose field of application continues to grow. Cellulose in wood pulp can be used as a raw material for the production of nanocellulose using enzymatic pre-treatments that generate valuable co-products. This process can be integrated into a conventional chemical pulp mill and constitutes a broadening of the products available to the pulp and paper industry. [less ▲]

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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’œstradiol est-il un neurotransmetteur ?
Cornil, Charlotte ULg

Conference (2007, December 19)

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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 (2015), 15(1), 91-111

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-amino acid load to enhance PET differentiation between tumor and inflammation: an in vitro study on (18)F-FET uptake.
Laique, S.; Egrise, D.; Monclus, M. et al

in Contrast Media & Molecular Imaging (2006), 1(5), 212-20

Labeled amino acids (AA) are tumor tracers for use in nuclear medecine. O-(2-[(18)F]fluoroethyl)-L-tyrosine (FET) is transported by the L-system, known to function as an exchanger. In vitro utilization of ... [more ▼]

Labeled amino acids (AA) are tumor tracers for use in nuclear medecine. O-(2-[(18)F]fluoroethyl)-L-tyrosine (FET) is transported by the L-system, known to function as an exchanger. In vitro utilization of FET, after a preload or prior to an afterload of non radioactive L-amino acids, was evaluated in order to measure the potential effects of AA content on the distinction between tumor and inflammatory lesions. Cellular uptake of FET was studied on rat osteosarcoma cells (ROS 17/2.8) and human leukocytes, initially loaded with nonradioactive L-tyrosine or L-methionine. FET efflux was evaluated from cells loaded with nonradioactive L-phenylalanine after tracer uptake. ROS 17/2.8 showed a higher sensitivity to preload and afterload effects on cellular FET content as compared with the leukocytes. We conclude that preload with L-tyrosine, prior to the administration of FET, may be a potential procedure to improve PET differentiation between tumor and inflammatory lesions. [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 multi-dimensional smoothing parameter selection
Frasso, Gianluca ULg; Eilers, Paul H.C.

in Muggeo, Vito M.R.; Capursi, Vincenza; Boscaino, Giovanni (Eds.) et al 28th International Workshop on Statistical Modelling, Palermo, Italy, 2013, Proceedings (2013, July)

Multi-dimensional smoothing applications require the selection of a vector of smoothing parameters. Standard procedures can be computational demanding and tend to under smooth the observed measurements ... [more ▼]

Multi-dimensional smoothing applications require the selection of a vector of smoothing parameters. Standard procedures can be computational demanding and tend to under smooth the observed measurements when noise correlation is present. The L-surface is an attractive two-dimensional generalization of the L-curve procedure for optimal smoothing. It preserves all the desirable feature of its uni-dimensional counterpart. However, one has to locate the point of maximal curvature of the surface, which is not easy. We introduce the V-valley as a simplified procedure that replaces maximum curvature by a distance to be minimized. [less ▲]

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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 ▲]

Detailed reference viewed: 36 (9 ULg)
See detailL. J. Baucher - J.-P. Blondel - O. Filippone, Trois architectes modernistes
Cohen, Maurizio ULg; Lund, Irene

Book published by Faculté d'architecture la Cambre - Horta de l'ULB / Fédération Wallonie Bruxelles (2011)

Detailed reference viewed: 22 (2 ULg)