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See detailLa loi du 6 janvier 2003 concernant les méthodes particulières de recherche et quelques autres méthodes d’enquête : un tournant dans la procédure pénale belge
Jacobs, Ann ULg

in Revue de la Faculté de Droit de l'Université de Liège (2004)

analyse de la loi du 6 janvier 2003 introduisant les méthodes particulières de recherche en droit belge

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See detailLa Commission de conciliation-construction. Deux années d'activité
Kohl, Benoît ULg

in Droit de la Consommation = Consumentenrecht [= DCCR] (2004), n° 65

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See detailSoil variability measured by a soil strenght sensor: within-field variability and similarity between fields
Hanquet, Bernard; Ndao, Tanor; Verbrugge, Jean-Claude et al

in Book of Abstracts (2004)

Many sensing methods for soil physical properties determination are developed to replace time-consuming and expensive soil sampling and analysis. Within this scope, sensors to measure soil strength are ... [more ▼]

Many sensing methods for soil physical properties determination are developed to replace time-consuming and expensive soil sampling and analysis. Within this scope, sensors to measure soil strength are developed in several laboratories. They are generally coupled to DGPS positioning systems to produce maps, showing within-field soil variability. In this study, besides the within-field variability, the sensor was used with another objective: the aim was to appraise the similarity of soil strength between different fields located in silty areas, in Belgium. [less ▲]

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See detailStratégie régionale de gestion de l’activité cynégétique en périphérie du parc du W (Bénin, Burkina Faso, Niger)
Boulet, H.; Vermeulen, Cédric ULg; Aladji-Boni, A. S. et al

in Game and Wildlife Science (2004), 21(3), 663-673

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See detailInvisible Sketch Interface in Architectural Engineering, in Graphics Recognition, Recent Advanced and Perspectives
Leclercq, Pierre ULg

in Lecture Notes in Computer Science (2004), 3088

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See detailFunctional modes of proteins are among the most robust
Nicolay, Samuel ULg; Sanejouand, Y. H.

in Physical Review Letters (2004), 96

It is shown that a small subset of modes which are likely to be involved in protein functional motions of large amplitude can be determined by retaining the most robust normal modes obtained using ... [more ▼]

It is shown that a small subset of modes which are likely to be involved in protein functional motions of large amplitude can be determined by retaining the most robust normal modes obtained using different protein models. This result should prove helpful in the context of several applications proposed recently, like for solving difficult molecular replacement problems or for fitting atomic structures into low- resolution electron density maps. It may also pave the way for the development of methods allowing us to predict such motions accurately. [less ▲]

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See detailLow frequency rythms in human DNA sequences: A key to the organization of gene location and orientation?
Nicolay, Samuel ULg; Argoul, F.; Touchon, M. et al

in Physical Review Letters (2004), 93(10), 108101

We explore large-scale nucleotide compositional fluctuations of the human genome using multi- resolution techniques. Analysis of the GC content and of the AT and GC skews reveals the existence of rhythms ... [more ▼]

We explore large-scale nucleotide compositional fluctuations of the human genome using multi- resolution techniques. Analysis of the GC content and of the AT and GC skews reveals the existence of rhythms with two main periods of 110 20 kb and 400 50 kb that enlighten a remarkable cooperative gene organization. We show that the observed nonlinear oscillations are likely to display all the characteristic features of chaotic strange attractors which suggests a very attractive deterministic picture: gene orientation and location, in relation with the structure and dynamics of chromatin, might be governed by a low-dimensional nonlinear dynamical system. [less ▲]

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See detailStructure des orientations de buts d'accomplissement chez des étudiants de première année universitaire
Broonen, Jean-Paul ULg

in Cahiers Internationaux de Psychologie Sociale (2004), 63

This research tests by 207 psychological and educational sciences students a model on achievement goals (mastery-approach, mastery-avoidance, performance-approach, performance-avoidance, and work ... [more ▼]

This research tests by 207 psychological and educational sciences students a model on achievement goals (mastery-approach, mastery-avoidance, performance-approach, performance-avoidance, and work avoidance). Factorial validity, reliability (internal consistency), concurrent validity (anxiety-test, intrinsic motivation, and extrinsic motivation), and criterion-related validity (self-regulation of effort) are in favour of the hypothesized five oblique structure. Similarities and differences with the ressults from American studies are discussed, especially in a cultural view. [less ▲]

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See detailIntérêt d'une stratification pédologique pour la constitution de référentiels régionaux sur les teneurs en éléments traces métalliques dans les sols de Wallonie
Colinet, Gilles ULg; Laroche, Jean; Etienne, Marie et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2004), 8(2)

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See detailLieu commun et communication. Concepts et application critique
Durand, Pascal ULg

in Durand, Pascal (Ed.) Médias et Censure. Figures de l’orthodoxie (2004)

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See detailCensure et sens commun professionnel
Durand, Pascal ULg

in Durand, Pascal (Ed.) Médias et Censure. Figures de l’orthodoxie (2004)

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See detailTrophic specialisations in alternative heterochronic morphs
Denoël, Mathieu ULg; Schabetsberger, Robert; Joly, Pierre

in Naturwissenschaften (Die) (2004), 91(2), 81-84

Polymorphisms are suspected of reducing competition among conspecifics in heterogeneous environments by allowing differential resource use. However the adaptive significance of alternative morphs has been ... [more ▼]

Polymorphisms are suspected of reducing competition among conspecifics in heterogeneous environments by allowing differential resource use. However the adaptive significance of alternative morphs has been poorly documented. The aim of this study is to determine food partitioning of two heterochronic morphs of the Alpine newt, Triturus alpestris, in mountain lakes. The morphs differ in the functional morphology of their feeding apparatus. Only paedomorphs are able to expel water during prey suction behind the mouth through gill slits. We observed a substantial trophic differentiation between morphs in all lakes. Paedomorphs preyed mainly on plankton, whereas metamorphs foraged on terrestrial invertebrates that fell upon the water surface. This resource partitioning may facilitate the coexistence of the alternative morphs in lakes devoid of vertebrate competitors. Food diversity may thus favour the evolutionary maintenance of facultative polymorphism in natural populations. [less ▲]

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See detailSolute contaminant transport in variably saturated dual-porosity/ dual permeability chalk: field tracer experiments and modelling
Brouyère, Serge ULg

in Aagaard, Per; Bedbur, Eckart; Bidoglio, Giovanni (Eds.) et al Saturated & unsaturated zone: integration of process knowledge into effective models - COST Action 629 Workshop (2004)

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See detailStructural damage detection based on PCA of vibration measurements
Golinval, Jean-Claude ULg; De Boe, Pascal; Yan, A. M. et al

in 58th Meeting of the Soc. for Mach. Failure Prevention Tech, Virginia Beach, 2004 (2004)

This paper deals with the application of statistical process control techniques based on principal component analysis to vibration-based damage diagnosis of structures. Principal component analysis of the ... [more ▼]

This paper deals with the application of statistical process control techniques based on principal component analysis to vibration-based damage diagnosis of structures. Principal component analysis of the sensor time-responses allows to extract principal directions (i.e. features) which define a subspace that is representative of the dynamics of the instrumented structure. Any change in the response of a single sensor will affect the subspace spanned by the complete sensor response set. It follows that the subspace corresponding to the current state of the structure can be compared to the subspace of the initial state of the structure, assumed to be healthy, in order to diagnose possible damage. Principal component analysis may also be performed for every potential subset of damaged sensors in order to identify the involved sensor, and, therefore, the damaged substructure. In this paper, the problem of structural damage detection is addressed in the case of environmental vibration testing. A direct application is presented for a test item submitted to random vibration testing by means of an electro-dynamic shaker. [less ▲]

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See detailStructural damage diagnosis under changing environmental conditions
Yan, A. M.; Kerschen, Gaëtan ULg; De Boe, Pascal et al

in 7th International Conference on Motion and Vibration Control, Saint Louis, 2004 (2004)

A method is proposed to perform structural health monitoring under varying environmental and operational conditions. The method is based on principal component analysis (PCA) applied to a data set ... [more ▼]

A method is proposed to perform structural health monitoring under varying environmental and operational conditions. The method is based on principal component analysis (PCA) applied to a data set containing vibration characteristics identified during the monitoring of the structure. The advantage of the method is that it does not require the measurement of environmental parameters that are taken into account as embedded variables. As the influence of environmental effects may be effectively eliminated, the residual error of the PCA prediction model remains small if the structure is healthy, and increases significantly when structural damage occurs. Novelty analysis on the residual errors provides a statistical indication of damage. The PCA-based damage detection method is illustrated using experimental data. It will also be shown that when the relationship between the vibration characteristics becomes nonlinear, PCA is advantageously replaced by one of its nonlinear generalizations. [less ▲]

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See detailLa critique heideggérienne de la philosophie de la religion (Windelband, Rickert, Troeltsch)
Dewalque, Arnaud ULg

in Horizons philosophiques (2004), 14(2), 105-127

This paper presents Heidegger’s courses on religion (1920-21) as a criticism of axiological philosophy. It shows that the neokantian conception of “holy”, “history” and “divinity” involves the theoretical ... [more ▼]

This paper presents Heidegger’s courses on religion (1920-21) as a criticism of axiological philosophy. It shows that the neokantian conception of “holy”, “history” and “divinity” involves the theoretical problem of the correlation between validity and reality. Reading this problem as the background of Heidegger’s own position reveals that : 1. the heideggerian conceptuality (world, significativity, historicity) makes sense in opposition to the axiological one (object, value, validity) ; 2. the methodological key of this opposition lies in the principle of “formal indication”, wich also governs Heidegger’s conference “Phenomenology and theology” (1927). [less ▲]

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See detailLearner Support in the Formasup degree: variety as a key feature and close coaching to drive innovation
Poumay, Marianne ULg

in Supporting the Learner in Distance Education and E-Learning (2004)

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See detailDetection of moulds growing on building materials by gas sensor arrays and pattern recognition
Kuske, Martyna; Padilla, M.; Romain, Anne-Claude ULg et al

in Technical digest of eurosensors : proceedings (2004)

This work explores the detection of moulds growing in different building materials by using a metal oxide sensor array Four mould species have been considered. Pattern Classification provides ... [more ▼]

This work explores the detection of moulds growing in different building materials by using a metal oxide sensor array Four mould species have been considered. Pattern Classification provides classification rates on the order of 80-90% for different species. Drift degrades slightyl these values subsequent test four months later. [less ▲]

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See detailNonlinear energy pumpin: A new paradigm for vibration isolation
Vakakis, Alexander F.; McFArland, D. Michael; Kerschen, Gaëtan ULg et al

in 3rd China-Japan US Symposium on Health Mondial and Control of Structures, Dalian, 2004 (2004)

We discuss passive nonlinear energy pumping from a linear (main) mechanical structure to a weakly coupled, local, passive nonlinear energy sink (NES). We show that the NES can be designed to effectively ... [more ▼]

We discuss passive nonlinear energy pumping from a linear (main) mechanical structure to a weakly coupled, local, passive nonlinear energy sink (NES). We show that the NES can be designed to effectively absorb vibrational energy from the main structure in a one-way, irreversible fashion. We demonstrate the occurrence of pumping cascades, where an appropriately designed NES passively extracts energy sequentially from a number of modes of the main (linear) structure, interacting individually with each mode before moving to the next. Experimental results confirm our theoretical findings. The applications of the nonlinear energy pumping phenomenon to the problem of vibration and shock isolation will be discussed. [less ▲]

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See detailProper Orthogonal modes for the characterisation of nonlinear dynamic systems
Kerschen, Gaëtan ULg; Lenaerts, Vincent; Golinval, Jean-Claude ULg et al

in Euromech Colloquim on Nonlinear Modes of Vibrating Systems, Frejus, 2004 (2004)

Modal analysis is extensively used for the analysis and design of structures. However, a major concern for structural dynamicists is that its validity is limited to systems showing a linear behaviour. New ... [more ▼]

Modal analysis is extensively used for the analysis and design of structures. However, a major concern for structural dynamicists is that its validity is limited to systems showing a linear behaviour. New developments have thus been proposed in order to tackle nonlinear systems among which the theory based on the nonlinear normal modes is indubitably the most appealing. In this study, a different approach is adopted and the modes extracted from the proper orthogonal decomposition are considered for the characterization of nonlinear systems. [less ▲]

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