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See detailImplicit Real Vector Automata
Boigelot, Bernard ULg; Brusten, Julien ULg; Degbomont, Jean-François ULg

in Electronic Proceedings in Theoretical Computer Science (2010), 39

This paper addresses the symbolic representation of non-convex real polyhedra, i.e., sets of real vectors satisfying arbitrary Boolean combinations of linear constraints. We develop an original data ... [more ▼]

This paper addresses the symbolic representation of non-convex real polyhedra, i.e., sets of real vectors satisfying arbitrary Boolean combinations of linear constraints. We develop an original data structure for representing such sets, based on an implicit and concise encoding of a known structure, the Real Vector Automaton. The resulting formalism provides a canonical representation of polyhedra, is closed under Boolean operators, and admits an efficient decision procedure for testing the membership of a vector. [less ▲]

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See detailImplicit Real Vector Automata
Degbomont, Jean-François ULg

Doctoral thesis (2013)

This thesis introduces a new data structure, the Implicit Real Vector Automaton (IRVA), suited for representing symbolically polyhedra, i.e., regions of n-dimensional space defined by finite Boolean ... [more ▼]

This thesis introduces a new data structure, the Implicit Real Vector Automaton (IRVA), suited for representing symbolically polyhedra, i.e., regions of n-dimensional space defined by finite Boolean combinations of linear inequalities. IRVA can represent exactly arbitrary convex and non-convex polyhedra, including features such as open and closed boundaries, unconnected parts, and non-manifold components. In addition, they provide efficient procedures for deciding whether a point belongs to a given polyhedron, and determining the polyhedron component (vertex, edge, facet, ...) that contains a point. An advantage of IRVA is that they can easily be minimized into a canonical form, which leads to a simple and efficient test for equality between represented polyhedra. Elementary IRVA representing primitive polyhedra, such as linear (in)equations and vector spaces are easily constructed and algorithms have been developed for computing Boolean combinations as well as projections of polyhedra represented by IRVA. These algorithms are illustrated by complete examples of executions as a support for the comprehension of their mechanisms. Another contribution is a first prototype implementation of an IRVA library, containing functions for building and manipulating arbitrary n-dimensional polyhedra. We reinforce the presentation of the implementation by discussing some design choices. Such choices include the use of exact arithmetic. Finally, experimental results are presented and discussed. These experiments pave the way to future adaptations and improvements. [less ▲]

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See detailIMPLICIT REPRESENTATION OF BOUNDARIES USING LEVEL-SETS FOR TRANSIENT MACHINING APPLICATION
Asadi Kalameh, Hossein ULg; Pierard, Olivier; Béchet, Eric ULg

Conference (2014, July)

This work aims at improving implicit representation of complex industrial work-pieces by reducing the existing gap between Computer Aided Design (CAD) and Computer Aided Engineering (CAE). The proposed ... [more ▼]

This work aims at improving implicit representation of complex industrial work-pieces by reducing the existing gap between Computer Aided Design (CAD) and Computer Aided Engineering (CAE). The proposed approach is based on the level-set technique [1]. Some novel results for accurate implicit representation of boundary include exact capture of sharp features as well as suitable approximation of curved boundaries for nite element computations [2]. This is done by detecting automatically geometrical points of the geometry and use this information in the implicit representation. Then, a Sweep Line Algorithm is used to subdivide the elements containing these geometrical points [3]. The method is general enough in order to describe automatically any arbitrary surface. All the developments are implemented in the commercial nite element package Mor- feo. Numerous applications can bene t from these developments including Cartesian grid problems as well as crack propagation with the X-FEM method. In this presentation, application to transient machining simulations will be illustrated. [less ▲]

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See detailImplicit sequence learning in children
Meulemans, Thierry ULg; Van der Linden, Martial ULg; Perruchet, Pierre

in Journal of Experimental Child Psychology (1998), 69(3), 199-221

The main purpose of the present study was to examine whether implicit learning abilities, assessed by means of a serial reaction time task, are present to the same extent in 6- and 10-year-old children as ... [more ▼]

The main purpose of the present study was to examine whether implicit learning abilities, assessed by means of a serial reaction time task, are present to the same extent in 6- and 10-year-old children as in adults. We also wondered whether the knowledge acquired after one learning session is retained after a one-week delay. And finally, we studied the explicit knowledge developed by the children in this task. Our results show no age-related difference in the serial reaction time performance, which is consistent with the idea that implicit learning abilities may be efficient early in development. [less ▲]

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See detailImplicit spoken words and motor sequences learning are impaired in children with Specific Language Impairment
Desmottes, Lise ULg; Meulemans, Thierry ULg; Maillart, Christelle ULg

in Journal of the International Neuropsychological Society (2016)

Objective. This study aims to compare verbal and motor implicit sequence learning abilities in children with and without Specific Language Impairment (SLI). Methods. Forty-eight children (24 control and ... [more ▼]

Objective. This study aims to compare verbal and motor implicit sequence learning abilities in children with and without Specific Language Impairment (SLI). Methods. Forty-eight children (24 control and 24 SLI) were administered the Serial Search Task (SST), which enables the simultaneous assessment of implicit spoken words and visuomotor sequences learning. Results. Results showed that control children implicitly learned both the spoken words as well as the motor sequences. In contrast, children with SLI showed deficits in both types of learning. Moreover, correlational analyses revealed that SST performance was linked with grammatical abilities in control children but with lexical abilities in children with SLI. Conclusion. Overall, this pattern of results supports the procedural deficit hypothesis and suggests that domain general implicit sequence learning is impaired in SLI. [less ▲]

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See detailImplicit surface-based design of regular bone scaffolds
Moesen, Maarten; Kerckhofs, Greet ULg; Van Bael, Simon et al

in Proc. ECCOMAS - International Conference on Tissue Engineering 2009. . 2009, Bártolo, P. (Eds.) (2009)

Detailed reference viewed: 9 (0 ULg)
See detailThe implicit transformation of national administrative authorities in the service of supranational ‘fair trial’ rights
Van Cleynenbreugel, Pieter ULg

Scientific conference (2017, March 24)

This presentation analyses to what extent the fundamental right to a fair trial has been instrumental in shaping or modifying the structure of national competition and financial market authorities in five ... [more ▼]

This presentation analyses to what extent the fundamental right to a fair trial has been instrumental in shaping or modifying the structure of national competition and financial market authorities in five States (the United Kingdom, France, Germany, the Netherlands and Belgium). Submitting that the ECtHR and the CJEU have succeeded in imposing a limited number of administrative organisation templates on administrative authorities and uncovering the limits of that approach, it will call for a more fundamental reflection on the risks and opportunities associated with inter- and supranational courts establishing, in a bottom-up fashion, administrative organisation templates subsequently imposed on States. [less ▲]

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See detailImplicit-explicit time integration algorithms for the numerical simulation of blade-casing interactions
Noels, Ludovic ULg; Stainier, Laurent ULg; Ponthot, Jean-Philippe ULg et al

in Rajendran, A. M.; Jones, B. N.; Brebbia, C. A. (Eds.) Structures under Shock and Impact VII (2002)

In order to solve fast dynamic problems, an explicit method is the most adapted. But for slower dynamics, an implicit method is more stable. Typical industrial problems are governed by high frequency, e.g ... [more ▼]

In order to solve fast dynamic problems, an explicit method is the most adapted. But for slower dynamics, an implicit method is more stable. Typical industrial problems are governed by high frequency, e.g. impact, during short time intervals and slower dynamics, e.g. spring-back, during other time intervals. The optimal solution is then to have both implicit algorithm and explicit methods readily available in the same code and to be able to switch automatically from one to the other. Criteria that decide when to shift from a method to another have been developed here. Implicit balanced restarting conditions that annihilate numerical oscillations resulting for an explicit calculation are also proposed. [less ▲]

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See detailAn implicit-gradient-enhanced incremental-secant mean- field homogenization scheme for elasto-plastic composites with damage
Wu, Ling ULg; Noels, Ludovic ULg; Adam, Laurent et al

in International Journal of Solids and Structures (2013), 50(24), 38433860

This paper presents an incremental-secant mean- field homogenization (MFH) procedure for composites made of elasto-plastic constituents exhibiting damage. During the damaging process of one phase, the ... [more ▼]

This paper presents an incremental-secant mean- field homogenization (MFH) procedure for composites made of elasto-plastic constituents exhibiting damage. During the damaging process of one phase, the proposed method can account for the resulting unloading of the other phase, ensuring an accurate prediction of the scheme. When strain softening of materials is involved, classical fi nite element formulations lose solution uniqueness and face the strain localization problem. To avoid this issue the model is formulated in a so-called implicit gradient-enhanced approach, with a view toward macro-scale simulations. The method is then used to predict the behavior of composites whose matrix phases exhibit strain softening, and is shown to be accurate compared to unit cell simulations and experimental results. Then the convergence of the method upon strain softening, with respect to the mesh size, is demonstrated on a notched composite ply. Finally, applications consisting in a stacking plate, successively without and with a hole, are given as illustrations of the possibility of the method to be used in a multiscale framework. [less ▲]

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See detailImplicit/explicit memory dissociation in Alzheimer's disease: the consequence of inappropriate processing?
Willems, Sylvie ULg; Salmon, Eric ULg; Van der Linden, Martial ULg

in Neuropsychology (2008), 22(6), 710-7

Dual-process theories of recognition posit that perceptual fluency contributes to both familiarity-based explicit recognition and perceptual priming. However, the priming-without-recognition dissociation ... [more ▼]

Dual-process theories of recognition posit that perceptual fluency contributes to both familiarity-based explicit recognition and perceptual priming. However, the priming-without-recognition dissociation, as observed through the intact mere exposure effect and impaired recognition in patients with Alzheimer's disease (AD), might indicate that familiarity and perceptual priming are functionally distinct. This study investigated whether the AD patients' processing strategies at testing may explain this priming-without-recognition dissociation. First, we replicated the priming-without-recognition effect in 16 patients who exhibited intact exposure effects despite null recognition. Second, we showed that, under identical conditions, inducing a holistic processing strategy during recognition testing increased AD patients' recognition--performance was similar for AD patients and healthy control participants. Furthermore, prompting analytic processing during both priming and recognition tasks decreased AD patients' performance in both tasks. These findings suggest that the extent to which AD patients use perceptual fluency in priming and recognition tasks is contingent on their processing approach. The choice of processing strategy may depend on how difficult patients perceive the task to be. [less ▲]

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See detailLes implicites de la gestion des compétences dans les entreprises artisanales
Schoenaers, Frédéric ULg; Beaucourt, Christel

in Louart, Pierre; Vilette, Marc-André (Eds.) La GRH dans les PME (2010)

Detailed reference viewed: 55 (10 ULg)
See detailImpliquer les femmes dans la décision économique: une stratégie gagnant
Cornet, Annie ULg

Conference given outside the academic context (2015)

Detailed reference viewed: 23 (5 ULg)
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See detailImpliquer les premiers concernés : la gestion participative des milieux anthropisés
Vermeulen, Cédric ULg

Conference (2013, May)

Comment faire en sorte d'associer les acteurs et futurs utilisateurs de la recherche? L'exemple des maquettes interactives à travers différents projets de foresterie sociale en Afrique

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See detailImpolite Orders in Ancient Greek? The οὐκ ἐρεῖς; type
Denizot, Camille ULg

in Journal of Historical Pragmatics (2012), 13(1), 110-128

In Ancient Greek, an impolite order can be uttered by means of a negative interrogative in the future tense (οκ ρες ‘Won’t you talk?’). The aim of this paper is to understand to what extent this type of ... [more ▼]

In Ancient Greek, an impolite order can be uttered by means of a negative interrogative in the future tense (οκ ρες ‘Won’t you talk?’). The aim of this paper is to understand to what extent this type of utterance is impolite, and to explain how such a conventional and indirect order can frequently take on an impolite meaning. For this purpose, data are taken from classical drama (Aristophanes’ and Euripides’ plays). Drawing on criteria put forward by recent work on impoliteness, this study provides an accurate description of uses in discourse, in order to establish that this conventional order is never used with a polite intention, but regularly as an impolite order. Impoliteness can be explained by the locutionary form which gives an orientation to the interpretation of the utterance: an indirect and conventional expression cannot be polite if the locutionary meaning is opposed to it. [less ▲]

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See detailImporre o Invitare? Le politiche di corporate social responsibility alla ricerca di un'identità europea
Esposito, Giovanni ULg; Carobolante, Anna

in Ianus: Diritto e Finanza (2013), 9

Périodique scientifique - The authors take as starting point the success of the Corporate Social Responsibility “label”, in order to analyse such concept within the EU context. As the EU approach to CSR ... [more ▼]

Périodique scientifique - The authors take as starting point the success of the Corporate Social Responsibility “label”, in order to analyse such concept within the EU context. As the EU approach to CSR follows closely the path tracked by the UN, special attention will be given to the commitments undertaken by the European Commission in its 2011 Communication, which led to the recent adoption of EU-endorsed Guidelines on Business and Human Rights; such initiatives will also be examined against the Commission’s policy on fundamental rights. Some concrete examples drawn from parliamentary questions on matters related to CSR, will help illustrate the role of the European Parliament in shaping a EU position on such issues, as well as give some insights into the developments in the EU policy on CSR. [less ▲]

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See detailImport of tRNA in Chlamydomonas reinhardtii mitochondria
Remacle, Claire ULg

Conference (2011, May 16)

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See detailLa importación literaria a finales del siglo XIX en Colombia: el caso de José Asunción Silva
Mogollon Zapata, Juan Manuel ULg

Conference (2016, October 25)

The analysis of the of Silva’s collection of works places us in quite a disconcerting, yet no less encouraging, position, when re-assessing the different forms of importing literary movements. On one hand ... [more ▼]

The analysis of the of Silva’s collection of works places us in quite a disconcerting, yet no less encouraging, position, when re-assessing the different forms of importing literary movements. On one hand, the image attributed to Silva both by his contemporaries and his successors is that of the leading figure in the assimilation and absorption of the literary European movements that would give rise to modernism. On the other hand, the absence of public visibility for Silva’s works, be it through texts or paratexts, let us in a difficult situation to prove the poet’s will to position himself as the one who introduced the new literary movement to Colombia. If we accept from the outset, as we will in this article, that the Colombian poet possessed an obstinate determination to appropriate and assimilate the European literary movements that give rise to modernism, then we must entertain the possibility that Silva’s literary transfer took place through media other than books, journals or magazines. Our hypothesis is that by focusing on the acts of reading and poise, the literary coterie became the ideal platform for the Colombian writer to adopt and propagate the image of the decadent writer, which would become the embodiment of the aesthetic ideals of modern literature. [less ▲]

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See detailL’importance aux yeux de Strasbourg de l’effectivité des recours indemnitaires et préventifs en cas de dépassement du délai raisonnable
Michiels, Olivier ULg; Falque, Géraldine ULg

in Revue Trimestrielle des Droits de l'Homme (2015), (2015/103), 741-758

The Belgian Government, on whom the burden of proof lies, has not shown that this compensatory remedy is garanteed in practice by the courts in the context of criminal proceedings. Accordingly, the remedy ... [more ▼]

The Belgian Government, on whom the burden of proof lies, has not shown that this compensatory remedy is garanteed in practice by the courts in the context of criminal proceedings. Accordingly, the remedy as currently organised in Belgium cannot be regarded as an effective means of complaining about the length of the criminal judicial investigation. The preventive remedies cannot, therefore, be regarded as effective in the present case. In fact, the Court noted that none of the measures in question was specifically directed at the delay which was the object of complaint. [less ▲]

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See detailImportance de Coula edulis Baill. pour les populations du Sud-Est du Gabon: niveaux de prélèvement et potentiel économique de l’espèce
Moupela, Christian; Vermeulen, Cédric ULg; Doucet, Jean-Louis ULg et al

in Tropicultura (2014), 32(1), 37-45

Coula edulis is a non-timber forest tree species that provides edible fruits for local people. However, its economical importance has never been quantified. The present study aimed to identify the fate of ... [more ▼]

Coula edulis is a non-timber forest tree species that provides edible fruits for local people. However, its economical importance has never been quantified. The present study aimed to identify the fate of stocks of harvested C. edulis fruits in Gabonese villages, emphasizing the social impact and economic income generated by this activity. Our investigations revealed that C. edulis fruits are predominantly utilized for own subsistence, since trading proportion concerned less than 20% of collected fruits. The average income from trade during the harvest period (two months) varied from € 1.7 to € 3.3 per household, depending on the proximity of the market (local or urban). The economical potential of C. edulis fruits could be improved if a sustainable production strategy through domestication processes and agroforestry practices was developed. Such a strategy may also contribute to the increase of the local demand of C. edulis fruits, assuming that a better diffusion was also carried out. [less ▲]

Detailed reference viewed: 108 (10 ULg)