Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
See detailExploitation forestière et gestion durable des forêts d'Afrique Centrale
Doucet, Jean-Louis ULg

Conference given outside the academic context (2009)

Detailed reference viewed: 59 (17 ULg)
Full Text
See detailExploitation forestière et gestion durable des forêts d’Afrique Centrale
Doucet, Jean-Louis ULg

Conference given outside the academic context (2008)

Detailed reference viewed: 29 (7 ULg)
Full Text
See detailL'exploitation laitière de demain : conclusions
Beckers, Yves ULg

Conference (2015, February 11)

Detailed reference viewed: 12 (2 ULg)
Full Text
See detailL'exploitation laitière de demain : point de vue des éleveurs sur le contrôle environnemental et le contexte social de la ferme
Froidmont, E.; Vanwindekens, Frédéric ULg; Masure, A. et al

in CRA-w (Ed.) Carrefour des Productions animales, 20ème édition "L'exploitation laitière wallonne de demain : du point de vue des acteurs aux propositions de la recherche" (2015)

Detailed reference viewed: 11 (0 ULg)
Full Text
See detailL'exploitation laitière de demain : présentation de l'enquête
Beckers, Yves ULg

Conference (2015, February 11)

Detailed reference viewed: 6 (1 ULg)
Full Text
Peer Reviewed
See detailExploitation of electronic medical records data in primary health care. Resistances and solutions. Study in eight Walloon health care centres.
Vanmeerbeek, Marc ULg

in Studies in Health Technology & Informatics (2004), 110

INTRODUCTION: The Electronic Medical Records (EMR), used every day for primary health care may constitute an instrument for gathering locally usable data to improve the quality of care and, on a larger ... [more ▼]

INTRODUCTION: The Electronic Medical Records (EMR), used every day for primary health care may constitute an instrument for gathering locally usable data to improve the quality of care and, on a larger scale, be a basis of epidemiological data. In spite of a policy of promotion of the EMR made by the Federation of French-speaking Belgian "Medical Houses", its use remains very marginal. METHODS: Eight Medical Houses, motivated by computerization of medical records have been met. Quantitative indicators of use of the EMR have been assessed. A qualitative assessment of the resistances to computerization, and solutions which can be brought, has been realized through the technique of the nominal group. RESULTS: The use of the EMR remains slight, allowing for exceptions. The proposed solutions could be put together in 5 categories : ethics, training, search for sense, practice and interdisciplinarity. DISCUSSION: The practitioners are willing to computerize if they get immediate advantages (knowledge of their patients and their team operating). They expressed the need of having a tool easy to use, that doesn't make them lose time and that has respect for their specificity of work and organization (interdisciplinary and self-managed teams). They expressed the need of an external support, under the form of adapted training and supervision for the data management. Ethical concerns (security, data transfer, place of the computer in the relationship with the patient) are surprisingly not present enough. [less ▲]

Detailed reference viewed: 35 (5 ULg)
Full Text
Peer Reviewed
See detailThe exploitation of ground-based Fourier transform infrared observations for the evaluation of tropospheric trends of greenhouse gases over Europe
De Mazière, Martine; Vigouroux, Corinne; Gardiner, Tom et al

in Environmental Sciences (2005), 2(2-3), 283-293

Solar absorption measurements using Fourier transform infrared (FTIR) spectrometry carry information about the atmospheric abundances of many constituents, including non-CO2 greenhouse gases. Such ... [more ▼]

Solar absorption measurements using Fourier transform infrared (FTIR) spectrometry carry information about the atmospheric abundances of many constituents, including non-CO2 greenhouse gases. Such observations have regularly been made for many years as a contribution to the Network for the Detection of Stratospheric Change (NDSC). They are the only ground-based remote sensing observations available nowadays that carry information about a number of greenhouse gases in the free troposphere. This work focuses on the discussion of the information content of FTIR long-term monitoring data of some direct and indirect greenhouse gases (CH4, N2O, O3 and CO and C2H6, respectively), at six NDSC stations in Western Europe. This European FTIR network covers the polar to subtropical regions. At several stations of the network, the observations span more than a decade. Existing spectral time series have been reanalyzed according to a common optimized retrieval strategy, in order to derive distinct tropospheric and stratospheric abundances for the above-mentioned target gases. A bootstrap resampling method has been implemented to evaluate trends of the tropospheric burdens of the target gases, including their uncertainties. In parallel, simulations of the target time series are being made with the Oslo CTM2 model: comparisons between the model results and the observations provide valuable information to improve the model and, in particular, to optimize emission estimates that are used as inputs to the model simulations. The work is being performed within the EC project UFTIR. The paper focuses on N2O for which the first trend results have been obtained. [less ▲]

Detailed reference viewed: 53 (12 ULg)
See detailExploitation of the inland navigation material
Marchal, Jean ULg

Learning material (1985)

Detailed reference viewed: 9 (2 ULg)
See detailExploitation of the Soil map in Belgium
Bah, Boubacar Billo ULg; Legrain, Xavier ULg; Colinet, Gilles ULg

Conference (2011, October 14)

Detailed reference viewed: 14 (7 ULg)
Full Text
Peer Reviewed
See detailExploitation of trispecific hybrids to introgress the glandless seed and glanded plant trait of Gossypium sturtianum Willis into G. hirsutum L.
Mergeai, Guy ULg; Baudoin, Jean-Pierre ULg; Vroh Bi, I.

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (1997), 1(4),

Detailed reference viewed: 14 (3 ULg)
Full Text
See detailExploitation optimale des lignes électriques aériennes à haute tension par évaluation en temps réel de la flèche des conducteurs et du vent agissant sur la portée
Godard, Bertrand ULg

Doctoral thesis (2015)

[Abstract] The primary concern with the electrical loading of high-voltage overhead lines is ground clearance, which depends on several factors, including constantly varying weather parameters. Sagging of ... [more ▼]

[Abstract] The primary concern with the electrical loading of high-voltage overhead lines is ground clearance, which depends on several factors, including constantly varying weather parameters. Sagging of the conductor, the main safety criteria, is due to (thermal) expansion of the line, a complex function of air temperature, solar radiation, local wind and actual current. A patented (patent US 8184015B2) method (based on a smart sensor named AmpacimonTM attached directly to an overhead line conductor) to directly measure the sag of overhead transmission line conductors is described. The main advantage of the concept is the real time direct measurement of the sag needed for the operation of the transmission or distribution system without the need for any additional and intermediate data, such as for example load, topological data, conductor tension, conductor temperature, and ambient weather conditions. The sag is determined by analyzing the conductor's vibrations, detecting the span's frequencies of vibrations. The fundamental frequencies form the exact signature of the span. Exterior conditions such as load, weather, topology, suspension movement, creep and the presence of snow and ice affect the sag, and, therefore, are automatically incorporated into the frequency of vibrations. Thus, this method is a direct sag evaluator compared to other methods that determine the sag based on conductor temperature or conductor tension measurements and inferences about other parameters (mass of conductor, span length,…). Moreover, sensor and method does not need to be calibrated, as the sag is deduced from the detected frequencies and not from signal amplitude. Completed field tests have confirmed that the method (and sensor) gives appropriate and highly accurate sag measurements (less than a 20 [cm] margin of error). The wind speed has a dramatic impact on power line ampacity as it is the main variable responsible for cooling down the conductor, and hence for the sag value. However, a single-spot measurement does not allow knowing the global effect of the wind over the whole span, in particular for low wind speeds (typically for wind speeds whose component perpendicularly to the conductor axis lower than 2-3 [m/s]) which are dramatic for ampacity (ampere capacity) determination. A patented (patent WO 2014090416 A1) direct method (based on a smart sensor named AmpacimonTM attached directly to an overhead line conductor) for measuring a perpendicular wind speed component with respect to a suspended cable span is presented. Appropriate data analysis coupling conductor's motion frequency detection, Strouhal equation and swing angle measurement gives a full picture of any wind speed. As the cable moves as a whole, the presented method provides a value which is representative of the mean perpendicular wind speed effect along the entire suspended cable span. In the past, the difficulty of predicting weather parameters and sag has resulted in conservative assumptions to ensure public safety and power-system security. If transmission system operators are to increase the use of the overhead line circuits' load-transfer capacity while ensuring the regulatory clearances above ground are maintained, they need a system that determines the available real-time load-transfer capacity, conductor sag (and perpendicular wind speed) by direct measurement, without the need to factor in unreliable parameters. The methods and system presented in this work will open new insights to power system network management in many aspects, from congestion management to preventive maintenance. [less ▲]

Detailed reference viewed: 22 (1 ULg)
See detailExploitation pédagogique de la télédétection par satellite
Binard, Marc ULg; Marchal, Denis; Donnay, Jean-Paul ULg

in Information et Enseignement (IBM) (1989), 15

Detailed reference viewed: 12 (1 ULg)
See detailExploitations philologiques et historiques d’une banque de données de la langue latine
Purnelle, Gérald ULg

in Cacaly, Serge; Losfeld, Gérard (Eds.) Sciences historiques, sciences du passé et nouvelles technologies d'information. Bilan et évaluation (1989)

Detailed reference viewed: 14 (1 ULg)
See detailExploiter et gérer durablement les forêts d'Afrique Centrale
Doucet, Jean-Louis ULg

Speech/Talk (2009)

Detailed reference viewed: 34 (10 ULg)
See detailExploiting Biology Specific Properties for the Estimation of Kinetic Parameters
Fey, D.; Bullinger, Eric ULg

Poster (2008, August)

Detailed reference viewed: 4 (0 ULg)
Full Text
Peer Reviewed
See detailExploiting Electron Spectroscopies to Probe the Structure and Organization of Self-assembled Monolayers : a Review
Duwez, Anne-Sophie ULg

in Journal of Electron Spectroscopy & Related Phenomena (2004), 134

In this paper, we review and discuss the use of electron spectroscopies to characterize self-assembled monolayers (SAMs). The review concentrates on thiol-derived monolayers on gold with emphasis on n ... [more ▼]

In this paper, we review and discuss the use of electron spectroscopies to characterize self-assembled monolayers (SAMs). The review concentrates on thiol-derived monolayers on gold with emphasis on n-alkanethiols, considered as archetypal systems. Since they are relatively simple model systems (ease of preparation, high structural order, and flexibility in the structure of chemical groups exposed to the surface), they are particularly well-suited reference samples for molecular level understanding of surface phenomena and for disclosing the potential of surface sensitive techniques. Some examples concerning silane-derived monolayers are also discussed. Many different spectroscopic techniques have been applied to characterize SAMs. Among them, electron spectroscopies, such as XPS, UPS, photoemission with synchrotron radiation, and HREELS, have been used to investigate the structure of alkanethiols on gold, and in particular, to characterize the S–Au bond, the packing density, the crystalline order, and molecular orientation.We try here to provide an overview on the structural information that can be obtained from those techniques. Damage processes induced by X-ray and electron beam are discussed in detail. [less ▲]

Detailed reference viewed: 20 (0 ULg)
Full Text
Peer Reviewed
See detailExploiting Localization for Faster Power System Dynamic Simulations
Aristidou, Petros ULg; Fabozzi, Davide; Van Cutsem, Thierry ULg

in Proc. IEEE PES 2013 PowerTech Conference (2013, June)

This paper proposes an algorithm for exploiting the localized response of power system components to accelerate dynamic simulations. During the simulation, components marginally participating to the ... [more ▼]

This paper proposes an algorithm for exploiting the localized response of power system components to accelerate dynamic simulations. During the simulation, components marginally participating to the system dynamics are characterized as latent and their dynamic models are replaced by much simpler equivalents. At the same time, components with significant dynamic activity are characterized as active and their original dynamic models are used. Based on the criterion proposed, components switch status between active and latent to increase performance while retaining accuracy. Two realistic test systems, a medium-scale and a large-scale, are used for the performance evaluation of the proposed method. [less ▲]

Detailed reference viewed: 156 (37 ULg)
Full Text
Peer Reviewed
See detailExploiting policy knowledge in online least-squares policy iteration: An empirical study
Busoniu, Lucian; Ernst, Damien ULg; Babusku, Robert et al

in Automation, Computers, Applied Mathematics (2010), 19(4), 521-529

Reinforcement learning (RL) is a promising paradigm for learning optimal control. Traditional RL works for discrete variables only, so to deal with the continuous variables appearing in control problems ... [more ▼]

Reinforcement learning (RL) is a promising paradigm for learning optimal control. Traditional RL works for discrete variables only, so to deal with the continuous variables appearing in control problems, approximate representations of the solution are necessary. The field of approximate RL has tremendously expanded over the last decade, and a wide array of effective algorithms is now available. However, RL is generally envisioned as working without any prior knowledge about the system or the solution, whereas such knowledge is often available and can be exploited to great advantage. Therefore, in this paper we describe a method that exploits prior knowledge to accelerate online least-squares policy iteration (LSPI), a state-of-the-art algorithm for approximate RL. We focus on prior knowledge about the monotonicity of the control policy with respect to the system states. Such monotonic policies are appropriate for important classes of systems appearing in control applications, including for instance nearly linear systems and linear systems with monotonic input nonlinearities. In an empirical evaluation, online LSPI with prior knowledge is shown to learn much faster and more reliably than the original online LSPI. [less ▲]

Detailed reference viewed: 51 (4 ULg)
Full Text
Peer Reviewed
See detailExploiting SNP Correlations within Random Forest for Genome-Wide Association Studies
Botta, Vincent ULg; Louppe, Gilles ULg; Geurts, Pierre ULg et al

in PLoS ONE (2014)

The primary goal of genome-wide association studies (GWAS) is to discover variants that could lead, in isolation or in combination, to a particular trait or disease. Standard approaches to GWAS, however ... [more ▼]

The primary goal of genome-wide association studies (GWAS) is to discover variants that could lead, in isolation or in combination, to a particular trait or disease. Standard approaches to GWAS, however, are usually based on univariate hypothesis tests and therefore can account neither for correlations due to linkage disequilibrium nor for combinations of several markers. To discover and leverage such potential multivariate interactions, we propose in this work an extension of the Random Forest algorithm tailored for structured GWAS data. In terms of risk prediction, we show empirically on several GWAS datasets that the proposed T-Trees method significantly outperforms both the original Random Forest algorithm and standard linear models, thereby suggesting the actual existence of multivariate non-linear effects due to the combinations of several SNPs. We also demonstrate that variable importances as derived from our method can help identify relevant loci. Finally, we highlight the strong impact that quality control procedures may have, both in terms of predictive power and loci identification. [less ▲]

Detailed reference viewed: 161 (14 ULg)