References of "2012"
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See detailFormer des enseignants à une approche par compétences efficace et équitable
Beckers, Jacqueline ULg; Campo, Anne ULg

in Beckers, Jacqueline; Crinon, Jacques; Simons, Germain (Eds.) Approche par compétences et réduction des inégalités d'apprentissage entre élèves (2012)

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See detailEcological review of black-grass (Alopecurus myosuroides Huds.) propagation abilities in relationship with herbicide resistance
Maréchal, Pierre-Yves ULg; Henriet, François; Vancutsem, Françoise ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2012), 16(1),

Alopecurus myosuroides Huds. (vulpin des champs) a toujours été une préoccupation majeure pour les céréaliculteurs et le développement de la résistance aux herbicides n’améliore pas la situation. Cet ... [more ▼]

Alopecurus myosuroides Huds. (vulpin des champs) a toujours été une préoccupation majeure pour les céréaliculteurs et le développement de la résistance aux herbicides n’améliore pas la situation. Cet article de synthèse résume les différents critères impliqués dans les modèles de dispersion d’individus de vulpin des champs au sein d’un champ ou d’une population sensible. Pour ce faire, le cycle complet du vulpin est décrit de la semence à la semence. Depuis le développement végétatif précoce jusqu’à la chute de la graine, chaque étape est décrite en prenant en compte comment la résistance aux herbicides peut influencer ou exercer un impact différent par rapport à des plantes sensibles. [less ▲]

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See detailAN INNOVATIVE APPROACH TO SELECT THE PREDICTION MODEL IN THE DEVELOPMENT OF NIR SPECTROSCOPIC METHODS
Ziemons, Eric ULg; Mantanus, Jérôme ULg; Rozet, Eric ULg et al

Poster (2012, March)

Taking into account its non-invasive, non-destructive character and fast data acquisition, near infrared spectroscopy is more and more integrated in production processes to acquire analytical results ... [more ▼]

Taking into account its non-invasive, non-destructive character and fast data acquisition, near infrared spectroscopy is more and more integrated in production processes to acquire analytical results. Implementation of a NIR quantitative method is performed using an iterative heuristic approach that will ultimately build a model allowing the prediction of the concentration of the analyte of interest. In this context, the aim of the present study was to develop an innovative approach based on statistical tolerance intervals and the desirability index FMI (Fitting Model Index) to select the most appropriate prediction model from a list of candidate models instead of using conventional criteria such as R², RMSEC, RMSECV and RMSEP [1-2] without objective decision rules. This new approach is illustrated on different steps of a real pharmaceutical manufacturing process: water and Active Pharmaceutical Ingredient (API) determinations in pharmaceutical pellets. Variability sources such as production campaigns, batches, days and operators were introduced in the calibration and validation sets. Partial Least Square (PLS) regression on the calibration sets was performed to build prediction models of which the ability to quantify accurately was tested with the validation sets. Regarding the product specifications, the acceptance limits were set at 20% and 5%, for the moisture and API determination, respectively.As can be seen from Figure 1 and 2, this innovative approach based on the desirability index FMI of the accuracy profile enabled to build and select the most appropriate prediction model in full accordance with its very final goal, to quantify as accurately as possible the analytes of interest. [1] Hubert Ph. et al., J. Pharm. Biomed. Anal., 36, 2007, 579-586. [2] Rozet E. et al., Ana. Chim. Acta, 591, 2007, 239-247. [less ▲]

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See detailNon invasive neurostimulation for headaches.
MAGIS, Delphine ULg

Conference (2012, March)

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See detailClinical significance of Escherichia albertii
Ooka, Tadasuke; Seto, Kazuko; Linden, Annick ULg et al

in Emerging Infectious Diseases (2012), 18(3), 488-492

Discriminating Escherichia albertii from other Enterobacteriaceae is diffi cult. Systematic analyses showed that E. albertii represents a substantial portion of strains currently identifi ed as eae ... [more ▼]

Discriminating Escherichia albertii from other Enterobacteriaceae is diffi cult. Systematic analyses showed that E. albertii represents a substantial portion of strains currently identifi ed as eae-positive Escherichia coli and includes Shiga toxin 2f–producing strains. Because E. albertii possesses the eae gene, many strains might have been misidentifi ed as enterohemorrhagic or enteropathogenic E. coli. [less ▲]

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See detailFrom direct to inverse analysis in flexible multibody dynamics
Bruls, Olivier ULg

Conference (2012, March)

Today, state-of-the-art simulation packages in flexible multibody dynamics allow the high-fidelity analysis of industrial mechanisms and machines in many application fields including robotics, automotive ... [more ▼]

Today, state-of-the-art simulation packages in flexible multibody dynamics allow the high-fidelity analysis of industrial mechanisms and machines in many application fields including robotics, automotive systems, aeronautics, deployable structures or wind turbines. The dynamic response of a given system can thus be evaluated in the time-domain for given load cases and given initial values. However, in many practical cases, the engineer does not have a precise knowledge of the mechanical design, the loading conditions and the initial state. This situation occurs for example in structural optimization, optimal control, experimental identification and health monitoring problems. The complexity of simulation codes and the computational cost of high-fidelity models are still important obstacles for the development of efficient resolution methods for these inverse problems. A current challenge is thus to elaborate simplified and more efficient modelling strategies in flexible multibody dynamics in order to enable the development of inverse analysis methods. The talk is divided into three parts. The first part provides an overview of available simulation techniques for flexible mechanisms with a particular emphasis on finite element-based approaches and time integration methods. Some illustrations are presented in the fields of deployable structures, vehicle dynamics and wind turbines. In the second part, optimization problems in flexible multibody dynamics are addressed and solved using gradient-based methods. Efficient methods for sensitivity analysis are discussed and special problems are treated such as the structural optimization of mechanical components or the numerical solution of inverse dynamics problems. The third part discusses a recently-developed Lie group approach which allows the formulation of the equations of motion of a multibody system in a parameterization-free setting. Based on this general formalism, which is characterized by an increased modularity and a reduced complexity, a large variety of Lie group solvers are foreseen not only for time integration but also for model reduction, sensitivity analysis and optimization. [less ▲]

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See detailEffects of management regimes and extreme climatic events on plant population viability in Eryngium alpinum
Andrello, Marco; Bizoux, Jean-Philippe ULg; BARBET-MASSIN, morgane et al

in Biological Conservation (2012), 147(1), 99-106

Extreme climatic events like the 2003 summer heatwave and inappropriate land management can threaten the existence of rare plants. We studied the response of Eryngium alpinum, a vulnerable species, to ... [more ▼]

Extreme climatic events like the 2003 summer heatwave and inappropriate land management can threaten the existence of rare plants. We studied the response of Eryngium alpinum, a vulnerable species, to this extreme climatic event and different agricultural practices. A demographic study was conducted in seven field sites between 2001 and 2010. Stage-specific vital rates were used to parameterize matrix population models and perform stochastic projections to calculate population growth rates and estimate extinction probabilities. Among management regimes, spring grazing and land abandonment decreased vital rates and population growth, while autumn grazing and late mowing had positive effects on population viability. The 2003 heatwave reduced fecundity rates and survival rates. Only spring grazed sites presented considerable extinction risk. Stochastic projections showed that an increased frequency of 2003-like events may exacerbate extinction risk, but extinction probability depends mainly on land management regimes. To better conserve E. alpinum populations, we recommend conversion of presently spring grazed and abandoned sites to late mowing or autumn grazing. [less ▲]

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See detailSome Applications of Mathematical Statistics in Management
Heuchenne, Cédric ULg

Scientific conference (2012, March)

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See detailLe système électoral comme institutionnalisation et contrôle du conflit en démocratie
Bouhon, Frédéric ULg

Scientific conference (2012, March)

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See detailMass Spectrometry lab activities in Liege - Small molecules
Focant, Jean-François ULg

Scientific conference (2012, March)

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See detailHeisenberg-limited metrology without entanglement
Braun, Daniel; Martin, John ULg

Conference (2012, March)

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See detailModellierung des Trennverhaltens wässriger Systeme in Packungskolonnen basierend auf tomographischen
Janzen, Anna; Steube, Julia; Aferka, Saïd ULg et al

Conference (2012, March)

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See detailLa lettre des Scipions adressée à la cité de Colophon (190-189a)
Famerie, Etienne ULg

Conference (2012, March)

Un riche dossier du Fonds Louis Robert conservé à l’Académie des Inscriptions et Belles-Lettres (copies, photographies, estampages, correspondance entre De Sanctis et Holleaux) éclaire l’histoire confuse ... [more ▼]

Un riche dossier du Fonds Louis Robert conservé à l’Académie des Inscriptions et Belles-Lettres (copies, photographies, estampages, correspondance entre De Sanctis et Holleaux) éclaire l’histoire confuse des éditions de cette lettre des Scipions (RDGE, 36). Le dossier permet aussi de donner une édition revue, qui n’est pas sans incidence sur le texte d’une autre lettre des deux frères (RDGE, 35). [less ▲]

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See detailL’Inventaire Systémique de Qualité de vie pour Adolescents (ISQV-A) : qualités psychométriques et application clinique
Etienne, Anne-Marie ULg; Missotten, Pierre ULg; Dupuis, Gilles

in Revue Francophone de Clinique Comportementale et Cognitive (2012), XVII(1), 44-56

Purpose: The objective was to determine the psychometric properties and the clinical application of a new Quality of Life self-assessment questionnaire suitable for adolescents 13 to 18 years old: the ... [more ▼]

Purpose: The objective was to determine the psychometric properties and the clinical application of a new Quality of Life self-assessment questionnaire suitable for adolescents 13 to 18 years old: the “Inventaire Systémique de Qualité de vie pour Adolescents” (ISQV-A). Methods: This was a cross-sectional validation study. 171 French adolescents have completed the ISQV-A. Other tools were used: the State-Trait Anxiety Inventory for Children (STAIC), the Children’s Depression Inventory (CDI). Results: The internal consistency of the four indices of the ISQV-A (state, goal, rank and gap) is satisfactory. All scores have their own specificity. The data show the convergent validity, test-retest fidelity and applicability of the ISQV-A. Conclusions: The adequacy of this new tool seems evident to highlight the adolescent’s quality of life. We will also discuss its clinical relevance into a cognitive behavioural approach. [less ▲]

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