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See detail"Grace of the Crocodiles" Towards Deterritorialization of Culture in Robert Drewe's Grace
Delrez, Marc ULg

in Collier, Gordon; Delrez, Marc; Fuchs, Anne (Eds.) et al Engaging with Literature of Commitment, Volume 2: The Worldly Scholar (2012)

Detailed reference viewed: 26 (3 ULg)
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See detailGrade retention at the transition to secondary school: A quasi-experimental study of its consequences on relationships with parents and peers
Lecocq, Aurélie; Mathys, Cécile ULg; Véronneau, Marie-Hélène

Conference (2014, May)

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See detailThe Grader layered intrusion (Havre-Saint-Pierre anorthosite, Québec) and genesis of nelsonite and other Fe-Ti-P ores
Charlier, Bernard ULg; Sakoma, Emmanuel; Sauvé, Martin et al

in Lithos (2008), 101(3-4), 359-378

The Grader layered intrusion is part of the Havre-Saint-Pierre anorthosite in the Grenville Province (Quebec, Canada). This intrusion has a basin-like morphology and contains significant resources of ... [more ▼]

The Grader layered intrusion is part of the Havre-Saint-Pierre anorthosite in the Grenville Province (Quebec, Canada). This intrusion has a basin-like morphology and contains significant resources of Fe–Ti–P in ilmenite and apatite. Outcropping lithologies are massive oxide alternating with anorthosite layers, banded ilmenite–apatite–plagioclase rocks and layered oxide apatite (gabbro-)norites. Drill cores provide evidence for stratigraphic variations of mineral and whole rock compositions controlled by fractional crystallization with the successive appearance of liquidus phases: plagioclase and ilmenite followed by apatite, then orthopyroxene together with magnetite, and finally clinopyroxene. This atypical sequence of crystallization resulted in the formation of plagioclase–ilmenite–apatite cumulates or “nelsonites” in plagioclase-free layers. Fine-grained ferrodiorites that cross-cut the cumulates are shown to be in equilibrium with the noritic rocks. The high TiO2 and P2O5 contents of these assumed liquids explains the early saturation of ilmenite and apatite before Fe–Mg silicates, thus the nelsonites represent cumulates rather than crystallized Fe–Ti–P-rich immiscible melts. The location of the most evolved mineral and whole rock compositions several tens of meters below the top of the intrusion, forming a sandwich horizon, is consistent with crystallization both from the base and top of the intrusion. The concentrations of V and Cr in ilmenite display a single fractionation path for the different cumulus assemblages and define the cotectic proportion of ilmenite to 21 wt.%. This corresponds to bulk cotectic cumulates with ca. 8 wt.% TiO2, which is significantly lower than what is commonly observed in the explored portion of the Grader intrusion. The proposed mechanism of ilmenite-enrichment is the lateral removal of plagioclase due to its relative buoyancy in the dense ferrodiorite melt. This plagioclase has probably accumulated in other portions of the intrusion or has not been distinguished from the host anorthosite. [less ▲]

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See detailGradient Boosted Regression Trees in Scikit-Learn
Prettenhofer, Peter; Louppe, Gilles ULg

Conference (2014, February 23)

This talk describes Gradient Boosted Regression Trees (GBRT), a powerful statistical learning technique with applications in a variety of areas, ranging from web page ranking to environmental niche ... [more ▼]

This talk describes Gradient Boosted Regression Trees (GBRT), a powerful statistical learning technique with applications in a variety of areas, ranging from web page ranking to environmental niche modeling. GBRT is a key ingredient of many winning solutions in data-mining competitions such as the Netflix Prize, the GE Flight Quest, or the Heritage Health Price. We give a brief introduction to the GBRT model and regression trees -- focusing on intuition rather than mathematical formulas. The majority of the talk is dedicated to an in depth discussion how to apply GBRT in practice using scikit-learn. We cover important topics such as regularization, model tuning and model interpretation that should significantly improve your score on Kaggle. [less ▲]

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See detailGradient boosting for kernelized output spaces
Geurts, Pierre ULg; Wehenkel, Louis ULg; d'Alché-Buc, Florence

in Proceedings of the 24th International Conference on Machine Learning (2007)

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See detailGradient of proteolytic enzymes, their inhibitors and matrix proteins expression in a ruptured abdominal aortic aneurysm
Defawe, O. D.; Colige, Alain ULg; Lambert, Charles ULg et al

in European Journal of Clinical Investigation (2004), 34(7), 513-514

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See detailGradient urbain-rural de la ville de Lubumbashi: dynamique entre 2002 et 2009
Andre, Marie ULg; Bogaert, Jan ULg; Mahy, Grégory ULg et al

in Ernoult, Aude (Ed.) Dynamiques écologiques des paysages: de l'agricole à l'urbain (2013, June 12)

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See detailGradient-optimization on the orthogonal group for Independent Component Analysis
Journee, Michel ULg; Absil, P.-A.; Sepulchre, Rodolphe ULg

in 7th International Conference on Independent Component Analysis and Blind Signal Separation (ICA 2007) (2007)

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See detailGradient-Proximal like Method for minimizing a Sum of two Convex Functions
Brohé, Myrana; Tossings, Patricia ULg

E-print/Working paper (2001)

For solving the convex optimization problem of finding a minimizer of a sum of two proper closed convex functions on a real Hilbert space, we consider a sequence generated by an inexact iterative scheme ... [more ▼]

For solving the convex optimization problem of finding a minimizer of a sum of two proper closed convex functions on a real Hilbert space, we consider a sequence generated by an inexact iterative scheme, based upon the Moreau-Yosida approximation, in which the quadratic kernel is replaced by a pseudo-distance, tied to Bregman functions. Several classical results (obtained for the Moreau-Yosida approximation) are extended to this context. [less ▲]

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See detailGrading aortic stenosis severity when the flow modifies the gradientvalve area correlation.
Lancellotti, Patrizio ULg

in Cardiovascular diagnosis and therapy (2012), 2(1), 6-9

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See detailEl grado cero de la escritura y Nuevos ensayos críticos
Barthes, Roland; Rosa, Nicolás; Willson, Patricia ULg

Book published by Siglo XXI Editores - Nueva edición ampliada y revisada (2011)

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See detailGradual changes in the sensitivity to the stimulant and sedative effects of ethanol during adolescence in Swiss mice
Quoilin, Caroline ULg; Didone, Vincent ULg; Quertemont, Etienne ULg

in Alcoholism, Clinical & Experimental Research (2010), 34(8), 97-97

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See detailGradual loss of myelin and formation of an astrocytic scar during Wallerian degeneration in the human spinal cord
Buss, A.; Brook, G. A.; Kakulas, B. et al

in Brain : A Journal of Neurology (2004), 127(Part 1), 34-44

Axons undergo Wallerian degeneration distal to a point of injury. Experimental investigations have documented many of the cellular and molecular events that underlie this behaviour. Since relatively ... [more ▼]

Axons undergo Wallerian degeneration distal to a point of injury. Experimental investigations have documented many of the cellular and molecular events that underlie this behaviour. Since relatively little is known about such events in human CNS pathologies and current experimental intervention strategies indicate the possibility of significant axon regeneration along the original degenerated fibre tract, we performed an immunohistochemical investigation of the dynamics of Wallerian degeneration in post mortem spinal cords of patients who died 2 days to 30 years after either cerebral infarction or traumatic spinal cord injury. Neurofilament (NF) staining demonstrated a spatio-temporal pattern of axonal loss within degenerating descending nerve fibre tracts that could be detected close to the lesion as early as 12 days after injury and progressed to an almost complete loss of NF immunoreactivity at survival times of 1 year and longer. Immunohistochemistry for glial fibrillary acidic protein revealed a late astrocytic reaction starting at 4 months after injury in the degenerating tracts, leading to the long-term deposition of a dense astrocytic scar. These events were accompanied by the gradual reduction of myelin basic protein in affected nerve fibre tracts, leading to almost complete loss by 3 years after injury. Since the extracellular matrix molecule chondroitin sulphate proteoglycan (CSPG) is known to be strongly inhibitory for axonal regeneration and to be a major component of gliotic scar tissues, we investigated the possible deposition of CSPG within the degenerating nerve fibre tracts. Apart from a local up-regulation close to the lesion site, our results show no enhanced CSPG expression within degenerated tracts at any survival time. This suggests that despite the apparent lack of CSPG in Wallerian degeneration, the slow reduction of CNS myelin and the long-term deposition of a dense astrocytic scar may present an environment that is non-supportive for axon regrowth. [less ▲]

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See detailGradual Network Expansion and Universal Service Obligations
Gautier, Axel ULg; Mizuno, Keizo

in Annals of Public and Cooperative Economics = Annales de l'Economie Publique, Sociale et Coopérative (2011), 82(2), 97-113

Universal service obligations are usually not competitively neutral as they modify the way firms compete in the market. In this paper, we consider a continuum of local markets in a dynamic setting with a ... [more ▼]

Universal service obligations are usually not competitively neutral as they modify the way firms compete in the market. In this paper, we consider a continuum of local markets in a dynamic setting with a stochastically growing demand. The incumbent must serve all markets (ubiquity) possibly at a uniform price and an entrant decides on its market coverage before firms compete in prices. Connecting a market involves a sunk cost. We show that the imposition of a uniform price constraint modifies the timing of entry: for low connection cost markets, entry occurs earlier while for high connection cost markets, entry occurs later. [less ▲]

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See detailGraeco-Egyptian Alchemy in Byzantium
Mertens, Michèle ULg

in Magdalino, Paul; Mavroudi, Maria (Eds.) The Occult Sciences in Byzantium (2006)

Detailed reference viewed: 160 (23 ULg)