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See detailQu'est-ce que le moyen age?
Kurth, Godefroid ULg

Book published by Bloud (n.d.)

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See detailRecherches sur les proportions d'acide carbonique contenues dans l'air
Spring, Walthère ULg; Roland, Léon

in Mémoires couronnés et autres Mémoires publiés par l'Académie Royale des Sciences, des Lettres et des Beaux-arts de Belgique (n.d.), XXXVII

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See detailSmooth estimation of survival functions and hazard ratios from interval-censored data using Bayesian penalized B-splines
Cetinyürek, Aysun ULg

Report (n.d.)

We discuss the use of Bayesian P-spline and of the composite link model to estimate survival functions and hazard-ratios from interval-censored data. If one further assumes proportionality of the hazards ... [more ▼]

We discuss the use of Bayesian P-spline and of the composite link model to estimate survival functions and hazard-ratios from interval-censored data. If one further assumes proportionality of the hazards, the proposed strategy provides a smoothed estimate of the baseline hazard along with estimates of global covariate effects. The frequentist properties of our Bayesian estimators are assessed by an extensive simulation study. We further illustrate the methodology by three examples showing that the proportionality of the hazards might also be found inappropriate from interval-censored data. [less ▲]

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See detailLes matières colorantes
Salomon, Hélène ULg

in Julien, Michèle (Ed.) Le Châtelperronien de la grotte du Renne (n.d.)

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See detailConceptual metaphors as a tool for the efficient teaching of Dutch and German posture verbs
De Knop, Sabine; Perrez, Julien ULg

in Review of Cognitive Linguistics (n.d.)

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See detailUsing an Integrated Quantitative Method to Monitor Simultaneously the Soil Erosion and Non-Point Source Pollution in an Intensive Agricultural Area
Ma, Li; Bu, Zhaozhong; Kerr, Philip et al

in pedosphere (n.d.)

In China, some areas with intensive agricultural use are facing serious environmental problems caused by non-point source pollution (NPSP) as a consequence of soil erosion (SE). Until now, simultaneous ... [more ▼]

In China, some areas with intensive agricultural use are facing serious environmental problems caused by non-point source pollution (NPSP) as a consequence of soil erosion (SE). Until now, simultaneous monitoring of both NPSP and SE is difficult due to the intertwined effects of differences in crop type, topography and management in these areas. Based on meteorological data, a Geographic Information System (GIS) database and soil and water samples, we propose a new integrated method to monitor SE and NPSP simultaneously and apply to an intensive agricultural area (Nanjing area, ~6 000 km2) in eastern China. The results showed that the levels of soil total nitrogen (TN), total phosphorus (TP), ammonium nitrogen (AN) and available phosphorus (AP) can be used to assess and predict the extent of NPSP and SE status in the study area. Most SE and the greatest NPSP loads occurred between April to August. The most seriously affected area in terms of SE and NPSP was the Jiangning District, implying that the effective management of SE and NPSP in this area should be considered a priority. The sub-regions with higher vegetation coverage contributed to less SE and NPSP, affirming the conclusions of previous studies, namely that vegetation is an effective factor in controlling SE and NPSP. This study shows that the application of our quantitative method has both high precision and reliability for the simultaneous monitoring of SE and NPSP occurring in intensive agricultural areas. [less ▲]

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See detailThe L-curve for optimal smoothing
Frasso, Gianluca ULg

E-print/Working paper (n.d.)

The L-curve, adopted for the selection of the regularization parameter in ill-posed inverse problems, shows a parametric plot of the residuals vs the penalty. The corner of the L indicates the right ... [more ▼]

The L-curve, adopted for the selection of the regularization parameter in ill-posed inverse problems, shows a parametric plot of the residuals vs the penalty. The corner of the L indicates the right amount of regularization. The L-curve is easy to compute and works surprisingly well also for smoothing data with correlated noise. We present the theoretical background, an alternative criterion to nd the corner automatically, and applications to real data. [less ▲]

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See detailCaractérisation de jets agricoles par traitement d'images
Massinon, Mathieu ULg; De Cock, Nicolas; Lebeau, Frédéric ULg

Software (n.d.)

A digital image analysis algorithm is proposed as an alternative to established optical techniques such as Phase Doppler Particle Analyser (PDPA) or laser diffraction spectrometry (LDS) for the ... [more ▼]

A digital image analysis algorithm is proposed as an alternative to established optical techniques such as Phase Doppler Particle Analyser (PDPA) or laser diffraction spectrometry (LDS) for the experimental determination of the size and velocity distributions of droplets produced by agricultural nozzles . The algorithm requires pairs of grayscale images acquired within a very short time for particle tracking in a backlighted arrangement. Spatial illumination heterogeneities are corrected by subtracting a mean background from each image. Droplets are then localized and sized. The algorithm accuracy is ensured by the rejection of out of focus particle using a focus parameter depending on gradient intensity at particle edges. Thresholds for in-focus particle selection were determined by studying the evolution of the focus parameter and the error on particle size measurement from images containing known size droplets at various distance of the object plane. Selected droplets are identified on both images of the pair for determining their velocities. Finally, drop size distribution is corrected to account for the uneven sampling probability caused by the volumetric method. [less ▲]

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See detailSpleen : analyse textuelle d’un poème de Léon-Paul Fargue
Tilkin, Françoise ULg; Mathonet, Anne

in Espace pour un humanisme européen (n.d.)

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See detailCreation, animation and perennial activities of Communities of Practice supported by ICT
Denis, Brigitte ULg

in Journal of Computer Assisted Learning (n.d.)

This paper considers groups of professionals (educationists, nurses…) or university learners. We observed how these groups tend to become CoPs and use ICT tools to support their activities. They started ... [more ▼]

This paper considers groups of professionals (educationists, nurses…) or university learners. We observed how these groups tend to become CoPs and use ICT tools to support their activities. They started using different types of ICT resources to produce, classify and share knowledge and to communicate. Some of these tools are based on standards (norms from the W3C) and have been developed inside the PALETTE European project. The other kind of tool is the platform eGroupWare that integrates different services. Our two main questions are: “Is it possible to create, animate and let a CoP supported by ICT become perennial?” and “Do ICT facilitate CoP’s development?”. First, the present paper shortly describes the main characteristics of a CoP and existing typologies about CoPs. Secondly, we shortly describe the Web services used by several CoPs we followed during research projects. Thirdly, we present seven CoPs coming from different fields (learning with ICT, education, and health). After describing the methodology used to collect data, we examine the evolution of each group referring to their objectives. We underline the obstacles and the facilitating factors to become/act as a CoP. Finally, we conclude, answering our two questions, and providing some recommendations about the management of CoPs supported by ICT. [less ▲]

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See detailA Review of the Dempster-Shafer Theory of Evidence
Verly, Jacques ULg

Scientific conference (n.d.)

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See detailÉléments de grammaire akkadienne
Van der Stede, Véronique ULg

Learning material (n.d.)

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See detailStratégies spécialisées d'acquisition de pigments rouges durant le Châtelperronien de la grotte du Renne à Arcy-sur-Cure, Yonne, France
Salomon, Hélène ULg; Coquinot, Yvan; Beck, Lucile et al

in Paillet, Patrick (Ed.) Actes du Colloque Micro-Analyses et Datations de l'Art Préhistorique dans son Contexte Archéologique (MADAPCA) (n.d.)

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See detailOn the processing of red pigment by late mousterian Neanderthals in Ormesson, Seine-et-Marne, France, 47000 years ago
Salomon, Hélène ULg; Bodu, Pierre; Geurten, Stéphanie et al

in en cours (n.d.)

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See detailCours de chimie générale : Notions préliminaires
Spring, Walthère ULg

Learning material (n.d.)

Detailed reference viewed: 26 (5 ULg)
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See detailZinc D-Ala-D-Ala carboxypeptidase
Ghuysen, Jean-Marie ULg

in CLAN MD (n.d.)

Detailed reference viewed: 2 (0 ULg)