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See detailRefinement of Inductor Models via a Subproblem Finite Element Method
Dular, Patrick ULg; Ferreira da Luz, Mauricio V.; Kuo-Peng, Patrick et al

in Proceedings of the 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC2010) (2010)

A sub-problem finite element method is developed for refining the inductor models in magnetic circuits. It applies electrokinetic, magnetostatic and magnetodynamic models on progressively more complicated ... [more ▼]

A sub-problem finite element method is developed for refining the inductor models in magnetic circuits. It applies electrokinetic, magnetostatic and magnetodynamic models on progressively more complicated geometries and different components of the solution, supported by different meshes. It allows an efficient and robust analyze of magnetic circuits in any frequency range, with an accurate calculation of Joule losses and forces in inductors. [less ▲]

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See detailRefinement of Non-Linear Magnetic Models via a Finite Element Subproblem Method
Dular, Patrick ULg; Krähenbühl, Laurent; V Sabariego, Ruth ULg et al

(2011)

Model refinements of non-linear magnetic circuits are performed via a finite element subproblem method. A com- plete problem is split into subproblems to allow a progression from 1-D to 3-D including ... [more ▼]

Model refinements of non-linear magnetic circuits are performed via a finite element subproblem method. A com- plete problem is split into subproblems to allow a progression from 1-D to 3-D including linear to non-linear model corrections. Its solution is then expressed as the sum of the subproblem solu- tions supported by different meshes. A convenient and robust correction procedure is proposed allowing independent overlapping meshes for both source and reaction fields. It simplifies both meshing and solving processes, and quantifies the gain given by each refinement on both local fields and global quantities. [less ▲]

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See detailRefinement of the media composition for the in vitro culture of early heart-shaped embryos in Phaseolus vulgaris.
Schmit, V.; Baudoin, Jean-Pierre ULg; Mergeai, Guy ULg

in Annual report of the Bean Improvement Cooperative (1991), 34

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See detailRefinement of the production of antigen-specific hen egg yolk antibodies (IgY) intended for passive dietary immunization in animals: A review
Marcq, Christopher ULg; Thewis, André ULg; Portetelle, Daniel ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2013), 17(3), 483-493

Antibodies have become essential tools in recent decades, with a wide range of applications in the laboratory and in human and veterinary medicine. The use of laying hens, instead of mammals, to obtain ... [more ▼]

Antibodies have become essential tools in recent decades, with a wide range of applications in the laboratory and in human and veterinary medicine. The use of laying hens, instead of mammals, to obtain the necessary antibodies from the eggs is a major advance in terms of animal welfare because it makes blood sampling obsolete. However, the advantages of this technology are numerous, in addition to the animal welfare aspect. With a carefully designed immunization protocol, it is possible to enhance both the hen’s immune response and its welfare during the process. This review puts forward recommendations how to do this and discusses recent approaches on improving the technology. [less ▲]

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See detailRefinement of two female fertility QTL using alternative phenotypes in French Holstein dairy cattle.
Guillaume, F.; Gautier, M.; Ben Jemaa, S. et al

in Animal Genetics (2007), 38(1), 72-4

Two quantitative trait loci (QTL) affecting female fertility were mapped in French dairy cattle. Phenotypes were non-return rates at 28, 56, 90 and 282 days after insemination. On chromosome 3, a QTL was ... [more ▼]

Two quantitative trait loci (QTL) affecting female fertility were mapped in French dairy cattle. Phenotypes were non-return rates at 28, 56, 90 and 282 days after insemination. On chromosome 3, a QTL was significant at 1% for non-return rate at 90 days, suggesting that it affects early fertility events. An analysis of SLC35A3, which causes complex vertebral malformation, excluded this gene from the QTL interval. On chromosome 7, a QTL was almost significant (P = 0.05) for non-return rate at 282 days. This QTL was associated with abortion and stillbirth problems. Use of appropriate phenotypes appeared important for fine-mapping QTL associated with fertility. [less ▲]

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See detailRefining Grasp Affordance Models by Experience
Detry, Renaud ULg; Kraft, Dirk; Buch, Anders Glent et al

in IEEE International Conference on Robotics and Automation (2010)

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See detailRefining Sparse Principal Components
Journée, M.; Bach, Francis; Absil, P.-A. et al

in Diehl, M. (Ed.) Recent Advances in Optimization and its Applications in Engineering (2010)

In this paper, we discuss methods to refine locally optimal solutions of sparse PCA. Starting from a local solution obtained by existing algorithms, these methods take advantage of convex relaxations of ... [more ▼]

In this paper, we discuss methods to refine locally optimal solutions of sparse PCA. Starting from a local solution obtained by existing algorithms, these methods take advantage of convex relaxations of the sparse PCA problem to propose a refined solution that is still locally optimal but with a higher objective value. [less ▲]

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See detailRefining the taxonomy of the Rattini tribe: a phylogeny-based delimitation of species boundaries
Pagès, Marie ULg; Chaval, Yannick; Herbreteau, Vincent et al

in BMC Evolutionary Biology (2010), 10(184), 184

Background: Rodents are recognized as hosts for at least 60 zoonotic diseases and may represent a serious threat for human health. In the context of global environmental changes and increasing mobility of ... [more ▼]

Background: Rodents are recognized as hosts for at least 60 zoonotic diseases and may represent a serious threat for human health. In the context of global environmental changes and increasing mobility of humans and animals, contacts between pathogens and potential animal hosts and vectors are modified, amplifying the risk of disease emergence. An accurate identification of each rodent at a specific level is needed in order to understand their implications in the transmission of diseases. Among the Muridae, the Rattini tribe encompasses 167 species inhabiting South East Asia, a hotspot of both biodiversity and emerging and re-emerging diseases. The region faces growing economical development that affects habitats, biodiversity and health. Rat species have been demonstrated as significant hosts of pathogens but are still difficult to recognize at a specific level using morphological criteria. DNAbarcoding methods appear as accurate tools for rat species identification but their use is hampered by the need of reliable identification of reference specimens. In this study, we explore and highlight the limits of the current taxonomy of the Rattini tribe. <br />Results: We used the DNA sequence information itself as the primary information source to establish group membership and estimate putative species boundaries. We sequenced two mitochondrial and one nuclear genes from 122 rat samples to perform phylogenetic reconstructions. The method of Pons and colleagues (2006) that determines, with no prior expectations, the locations of ancestral nodes defining putative species was then applied to our dataset. To give an appropriate name to each cluster recognized as a putative species, we reviewed information from the literature and obtained sequences from a museum holotype specimen following the ancient DNA criteria. <br />Conclusions: Using a recently developed methodology, this study succeeds in refining the taxonomy of one of the most difficult groups of mammals. Most of the species expected within the area were retrieved but new putative species limits were also indicated, in particular within Berylmys and Rattus genera, where future taxonomic studies should be directed. Our study lays the foundations to better investigate rodent-born diseases in South East Asia and illustrates the relevance of evolutionary studies for health and medical sciences. [less ▲]

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See detailRefining the taxonomy of the Rattini tribe: a phylogeny-based delimitation of species boundaries
Pagès, Marie ULg; Chaval, Yannick; Waengsothorn, Surachit et al

Poster (2009, August)

Among mammals, rodents are recognized as the major hosts and vectors of zoonoses and represent a serious threat for human health. Because of global change, interactions between hosts and pathogens are ... [more ▼]

Among mammals, rodents are recognized as the major hosts and vectors of zoonoses and represent a serious threat for human health. Because of global change, interactions between hosts and pathogens are dramatically modified leading to new unexpected disease risks. To predict some of these, accurate identification of each rodent at specific level is needed. Among Muridae, the Rattini tribe encompasses 167 species inhabiting South East Asia, a hotspot of biodiversity facing with a growing economical development, affecting habitats, biodiversity and health but also a hot place of emerging and re-emerging diseases. Rat species were demonstrated as main hosts of pathogens but are difficult to recognize at a specific level using morphological criteria. DNA-barcoding methods appear as promising tools for accurate rat species identifications but their achievement is hampered by the need of reliable identifications as a departure. To provide a rigorous systematic framework for epidemiological surveys, we carried out a taxonomic revision of the Rattini tribe. As morphological characters are misleading, we decided to use the DNA sequence information itself as the primary information source to establish group membership and define species boundaries. We sequenced two mitochondrial and one nuclear genes from 122 rat samples to perform phylogenetic reconstructions and applied the method developed by Pons and colleagues (2006) that determines with no a priori the locations of ancestral nodes defining putative species. To name each cluster recognized as a valid species, we obtained sequence from museum holotype specimen, illustrating how huge opportunities ancient DNA analysis may offer to taxonomists. [less ▲]

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See detailRefining Topological Relations between Regions Considering Their Shapes
Billen, Roland ULg; Kurata, Yohei

in Lecture Notes in Computer Science (2008), 5266/2008

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See detailRefining vegetation simulation models: From plant functional types to bioclimatic affinity groups of plants
Laurent, J.-M.; Bar-Hen, A.; François, Louis ULg et al

in Journal of Vegetation Science (2004), 15(6), 739-746

Question: How to refine simulations based on a global vegetation model in order to apply it to regional scale? Location: Europe from 35degrees N to 71degrees N and 25degrees W to 70degrees E. Methods ... [more ▼]

Question: How to refine simulations based on a global vegetation model in order to apply it to regional scale? Location: Europe from 35degrees N to 71degrees N and 25degrees W to 70degrees E. Methods: Geographical ranges of European plants were georeferenced and used with monthly mean climatic data (diurnal temperature ranges, ground frost frequencies, precipitation, relative humidity, rain frequencies, amount of sunshine hours and temperature) and growing degree days to infer climatic boundaries for 320 taxa. We performed a discriminant analysis to define their potential geographic ranges. Hierarchical clustering was computed on potential ranges. Results: Clustering provided 25 Bioclimatic Affinity Groups (BAG) of plants consisting of 13 tree, seven shrub and five herb groups. These BAGs are characterized by different geographical ranges and climatic tolerances and requirements. Conclusion: The use of monthly data instead of annual values improved the prediction of potential distribution ranges and highlighted the importance of climate seasonality for defining the plant groups with accuracy. The BAGs are detailed enough to provide finer reconstructions and simulations of the vegetation at the regional scale. [less ▲]

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See detailRefit Analysis of the Bois Laiterie Plaquettes
Miller, Rebecca ULg; López Bayón, Ignacio

in Otte, Marcel; Straus, Lawrence G. (Eds.) La grotte du Bois Laiterie (1997)

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See detailReflection amplifiers in online courses: a classification framework
Verpoorten, Dominique ULg; Westera, W.; Specht, M.

in Journal of Interactive Learning Research (2011), 22(2), 167-190190

This paper provides a theoretical framework for "reflection amplifiers" that are used in online courses. Such reflection amplifiers are intervention techniques that aim at provoking reflective practices ... [more ▼]

This paper provides a theoretical framework for "reflection amplifiers" that are used in online courses. Such reflection amplifiers are intervention techniques that aim at provoking reflective practices in learning, in order to enhance the quality and effectiveness of learning and promote meta-cognition. A literature survey identified a sample of 35 different techniques, revealing a great variety of reflection amplifiers in today's educational practice. For the support of research into this topic, the paper provides a theoretical classification framework structured along two relevant attributes of reflection amplifiers: (a) the type of interaction which enacts the reflection amplifiers, and (b) the educational objective of the reflective activities. The framework provides a concrete and ordered expression of pursued reflective or meta-learning approaches. It has been used to create a mapping of the 35 identified techniques, enabling their detailed positioning, qualification and comparison. The framework also helps guiding future research activities and to create awareness among online course developers about the different approaches available. The paper concludes with the identification of relevant research challenges associated with the topic. [less ▲]

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See detailReflection amplifiers in self-regulated learning
Verpoorten, Dominique ULg

Doctoral thesis (2012)

The project studies how presenting task-related, performance and social context indicators as prompts for reflection to learners can best support meta-learning in self-regulated-learning settings. Meta ... [more ▼]

The project studies how presenting task-related, performance and social context indicators as prompts for reflection to learners can best support meta-learning in self-regulated-learning settings. Meta-learning, for the purpose of this research, denotes the competency to make the experience of learning an object of attention, an object of reflection and an object of conversation. Reflection amplifiers are artefacts that trigger, ease and enhance this activity. Though it strongly relies on and refers to the research dedicated to the germane concept of metacognition, the thesis prefers to use the term "meta-learning" because this involves more than cognition, embracing aspects of the learning experience like semantic intensity, affective dimensions, social relations or context appraisal. Also, the term meta-learning it is more easily understood by practitioners (students and teachers). The PhD-work entails analysing existing solutions and prototyping new tools, investigating their relevance and use conditions, and assessing their effects on meta-learning. The research also includes the development of a pedagogically-grounded rationale and a set of guidelines for the design of such artefacts. [less ▲]

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See detailThe Reflection Nebula Surrounding HD87643
Surdej, Anna ULg; Surdej, Jean ULg; Swings, Jean-Pierre ULg et al

in Astronomy and Astrophysics (1981), 93

Direct plates in narrow bands (H , [0 NI], [S Ii]) and in the broad (B)-band show that the nebula surrounding the nova- like object HD 87643 is of reflective origin. Furthermore, a spectrogram of the ... [more ▼]

Direct plates in narrow bands (H , [0 NI], [S Ii]) and in the broad (B)-band show that the nebula surrounding the nova- like object HD 87643 is of reflective origin. Furthermore, a spectrogram of the filamentary condensation lying east-west at 17" north of HD 87643 reveals strong Balmer emission lines, with a P Cygni structure at H fl H e, as well as many diffuse emission lines of Fe II: such features essentially form a replica of the spectrum of the central object. These results and other arguments strongly support the idea that the reflection nebula surrounding HD 87643 is associated with the mass-outflow observed from the central hot star. Key words: reflection nebula - HD 87643 - mass-loss [less ▲]

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See detailReflection spheres of the public, social and cooperative economy
Fecher-Bourgeois, Fabienne ULg; Lévesque, Benoît

Conference (2008, September 24)

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See detailReflections on risk and resilience in adolescence
Born, Michel ULg; Jackson, Sandy; Jacob, Marie-Noël

in Journal of adolescence (1997), 20

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See detailReflections on the notion of 'consumer behaviour'
Hendrickx, Kim ULg

Conference (2012, April 20)

Today, consumer behavior has become a key concept in scientific publications and in international public health strategies. Both 'behavior' and the 'consumer' are in the title of the 3rd annual conference ... [more ▼]

Today, consumer behavior has become a key concept in scientific publications and in international public health strategies. Both 'behavior' and the 'consumer' are in the title of the 3rd annual conference of the Belgian Nutrition Society. This paper proposes a reflection on these concepts, and invites for further discussion. Firstly, the 'consumer' and his attributes will be briefly explored through an analysis of the Health Claims Regulation EC No 1924/2006. This document, intended to protect consumers from misleading information, uses a model of the consumer rooted in rational choice theory. Secondly, as medical sociologist David Armstrong (2009) has shown, the term 'behavior' has been brought in relation to health outcomes only relatively recently in medicine and public health. As such, it has come to be defined as a modifiable risk factor. I argue that European public health strategies have integrated this definition of behavior and the related idea of 'lifestyle' into rational choice theory. As such, 'behavior' and 'lifestyle' frame problems of health and disease in a specific way. The third section of this paper will confront this model of problem-framing with different understandings of 'behavior' coming from historical and contemporary sociological research. [less ▲]

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