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See detailEvaluating the reliability of analytical results using a probability criterion: a Bayesian perspective
Rozet, Eric ULg; Govaerts, B.; Lebrun, Pierre ULg et al

in Analytica Chimica Acta (2011), 705

Methods validation is mandatory in order to assess the fitness of purpose of the developed analytical method. Of core importance at the end of the validation is the evaluation of the reliability of the ... [more ▼]

Methods validation is mandatory in order to assess the fitness of purpose of the developed analytical method. Of core importance at the end of the validation is the evaluation of the reliability of the individual results that will be generated during the routine application of the method. Regulatory guidelines provide a general framework to assess the validity of a method, but none address the issue of results reliability. In this study, a Bayesian approach is proposed to address this concern. Results reliability is defined here as “the probability of an analytical method to provide analytical results within predefined acceptance limits around their reference or conventional true concentration values over a defined concentration range and under given environmental and operating conditions.” By providing the minimum reliability probability needed for the subsequent routine application of the method, as well as specifications or acceptance limits , the proposed Bayesian approach provides the effective probability of obtaining reliable future analytical results over the whole concentration range investigated. This is summarized in a single graph: the reliability profile. This Bayesian reliability profile is also compared to two frequentist approaches, the first one derived from the work of Dewé et al. [Dewé W., Govaerts B., Boulanger B., Rozet E., Chiap P., Hubert Ph., Chemometr. Intell. Lab. Syst. 85 (2007) 262-268] and the second proposed by Govaerts et al. [B. Govaerts, W. Dewé, M. Maumy, B. Boulanger, Qual. Reliab. Engng. Int. 24 (2008) 667-680]. Furthermore, to illustrate the applicability of the Bayesian reliability profile, this approach is also applied here to a bioanalytical method dedicated to the determination of ketoglutaric acid (KG) and hydroxymethylfurfural (HMF) in human plasma by SPE-HPLC-UV. [less ▲]

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See detailEvaluating the social costs and benefits of surveillance: the case of HPAI in Vietnam
Delabouglise, alexis; Antoine-Moussiaux, Nicolas ULg; Phan Dang, Thang et al

Conference (2014, May 08)

Economic evaluations of animal health surveillance systems are critical components of the assessment of their long-term sustainability and the improvement of their cost- effectiveness. Social costs and ... [more ▼]

Economic evaluations of animal health surveillance systems are critical components of the assessment of their long-term sustainability and the improvement of their cost- effectiveness. Social costs and benefits of health information release through the surveillance systems are fundamental determinants of the acceptability and efficacy of surveillance and are often neglected in the evaluation process. This study presents the evaluation of social costs and benefits of Highly Pathogenic Avian Influenza (HPAI) surveillance in Vietnam. Three field studies were conducted in the South and North of the country. Data on animal health information flow networks and social costs and benefits were collected using participatory approaches. Non-monetary costs and benefits were quantified using a newly developed tool based on stated choice method and participatory techniques. The study showed that private actors incur many transaction costs in reporting the information. However social costs mainly arise from price drops due to information release on market which has strong influences on the decision to disclose sanitary information. This applies at all levels including farmers and veterinary authorities. Private actors of the poultry sector valued information on occurring disease outbreaks, which is perceived as a social benefit. However avian influenza information is scarcely disclosed in private networks as stakeholders fear its potential impact on markets. [less ▲]

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See detailEvaluating xen for router virtualization
Egi, N.; Greenhalgh, A.; Handley, M. et al

in Computer Communications and Networks, 2007. ICCCN 2007. Proceedings of 16th International Conference on (2007)

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See detailEvaluation of the volatile emission changes from Arabidopsis thaliana Col-0 in response to temperature stress and Myzus persicae infestation interaction by HS-SPME-GC/MS
Hien, Truong Thi Dieu ULg

Poster (2013, February 08)

Volatile organic compounds (VOCs) are considered to be priming agents in plant responsive defense to protect themselves against abiotic or/and biotic stresses. Such stresses often influence on plant ... [more ▼]

Volatile organic compounds (VOCs) are considered to be priming agents in plant responsive defense to protect themselves against abiotic or/and biotic stresses. Such stresses often influence on plant photosynthesis and defense responses, resulting in a variety of volatile profiles. We investigated how different temperature regimes affect the VOCs emission capacity of Arabidopsis thaliana Col-0 (A.t Col-0) in the presence and absence of a sucking insect – Myzus persicae (green peach aphid). VOCs analyses were made with solid-phase micro-extraction coupled with gas chromatography - mass spectrometry (SPME- GC/MS) under controlled and various stress treatments. In response to temperature stresses, alcohols, ketones, aldehydes and terpenes were the most emitted VOCs. Moreover, the compared results showed that the percent emission of several compounds changed significantly. The interaction between temperature stresses and aphids released some new volatile components; like isothiocynates, esters, sulfur compound and nitrile. Besides, the qualitative and overall proportion of volatile blends differed significantly from plants subjected to the stress treatments within different time intervals (0-24h; 24-48h and 48-72h). Overall, both stress treatments correlated with increased or decreased levels of VOCs classes from Arabidopsis shoot organs. Knowledge of how the temperature – aphids interaction influences on VOCs emission in this study also provides interesting information for evaluating the responsive resistance in plants under natural environments. [less ▲]

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See detailEVALUATION SANCTIONNANTE D’ÉTUDIANTS DANS UN DISPOSITIF SUSCITANT LA RÉFLEXIVITÉ EN 2E CYCLE D’ÉTUDES MÉDICALES DANS UN COURS DE « MÉDECINE PALLIATIVE ET DE FIN DE VIE » DONT LES MOYENS UTILISÉS SONT LE PORTFOLIO ÉLECTRONIQUE, LE TUTORAT ET DES COURS THÉORIQUES
Giet, Didier ULg; MASSART, Valérie ULg; Deum, Mélanie ULg et al

in Bulletin de l'ADMEE 2001/1 (2011)

Le cours de Médecine Palliative est dispensé aux étudiants en avant-dernière année des études médicales de 2e cycle par deux enseignants, Médecin Généraliste et Médecin Hospitalier. Ce cours est dispensé ... [more ▼]

Le cours de Médecine Palliative est dispensé aux étudiants en avant-dernière année des études médicales de 2e cycle par deux enseignants, Médecin Généraliste et Médecin Hospitalier. Ce cours est dispensé depuis 10 ans selon un format traditionnel ex cathedra. De nouveaux objectifs et de nouvelles modalités pédagogiques ont été introduits en 2010-2011. L’objectif principal est l’apprentissage réflexif des étudiants. Les outils pédagogiques sont le portfolio électronique, une vignette clinique évolutive, l’accompagnement à distance de chaque étudiant par un tuteur, des cours en présentiel. La pratique réflexive de chaque étudiant est évaluée au terme du dispositif selon des critères et des indicateurs préalablement communiqués. Des perspectives ont émergé sur base des analyses des forces et faiblesses. [less ▲]

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See detailEvaluation : "ni pensée unique ni bonnes ou mauvaises méthodes"
Vandoorne, Chantal ULg; Jabot, Françoise; Fond-Harmant, Laurence

in La Santé de l'Homme (2007), (390), 12-13

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See detailEvaluation : réponses à des questions qui dérangent
Vandoorne, Chantal ULg

in La Santé de l'Homme (2007), (390), 24-25

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See detailEvaluation à long terme du couple ischio-jambiers quadriceps après ligamentoplastie du genou
Croisier, Jean-Louis ULg; Bernard, P.; Huskin, Jean-Pierre ULg et al

in Expériences en Rééducation Locomotrice (1992)

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See detailL'évaluation actuarielle des engagements de pension selon l'IAS 19 et ses perspectives d'évolution
Sougné, Danielle ULg

in Revue française de comptabilité (2009)

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See detailEvaluation agromorphologique et sélection des meilleures accessions de Pourghère (Jatropha curcas L.) introduites au Bénin
Ahoton, L. E.; Quenum, F.; Mergeai, Guy ULg

in International Journal of Biological and Chemical Sciences (2011), 5(4), 1619-1627

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See detailEvaluation analytique de la cystatine C: résultats de l'étude multicentrique SN/SFBC
Cavalier, Etienne ULg; Barguil, Y.; Bourgeois, A. M. et al

in Néphrologie & Thérapeutique (2010, September), 6(5), 314

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See detailEvaluation and comparison of the behaviour at sea and forces in cables of two types of offshore tension leg platforms
Marchal, Jean ULg; Lejeune, A.

in International Symposium on CABLE DYNAMICS (1995)

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See detailEVALUATION AND IMPROVEMENT OF CHILD’S SITTING POSITION IN CLASSROOM
Fettweis, Tatiana ULg; Henrist, Laura; Vanderthommen, Marc ULg

Poster (2012, November 17)

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See detailEvaluation and proposal for optimalization of neurophysiological tests in migraine: Part 1 - electrophysiological tests
Magis, Delphine ULg; Ambrosini, Anna; Bendtsen, L. et al

in Cephalalgia : An International Journal of Headache (2007), 27(12), 1323-1338

Neurophysiological testing has become a valuable tool for investigating brain excitability and nociceptive systems in headache disorders. Previous reviews have suggested that most neurophysiological tests ... [more ▼]

Neurophysiological testing has become a valuable tool for investigating brain excitability and nociceptive systems in headache disorders. Previous reviews have suggested that most neurophysiological tests have limited value for headache diagnosis, but a vast potential for exploring the pathophysiology of headaches, the central effects of certain pharmacological treatments and phenotype-genotype correlations. Many protocols, however, lack standardization. This meta-analytical review of neurophysiological methods in migraine was initiated by a task force within the EUROHEAD project (EU Strep LSHM-CT-2004-5044837-Workpackage 9). Most of the neurophysiological approaches that have been used in headache patients are reviewed, i.e. evoked potentials, nociception-specific blink reflex, single-fibre electromyography, neuroimaging methods (functional MRI, PET, and voxel-based morphometry) and the nitroglycerin attack-provoking test. For each of them, we summarize the results, analyse the methodological limitations and propose recommendations for improved methodology and standardization of research protocols. The first part is devoted to electrophysiological methods, the second to neuroimaging techniques and the NTG test. [less ▲]

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See detailEvaluation and proposal for optimization of neurophysiological tests in migraine: Part 2 - neuroimaging and the nitroglycerin test
Magis, Delphine ULg; Bendtsen, L.; Goadsby, P. J. et al

in Cephalalgia : An International Journal of Headache (2007), 27(12), 1339-1359

Neuroimaging methods have been widely used in headache and migraine research. They have provided invaluable information on brain perfusion, metabolism and structure during and outside of migraine attacks ... [more ▼]

Neuroimaging methods have been widely used in headache and migraine research. They have provided invaluable information on brain perfusion, metabolism and structure during and outside of migraine attacks, contributing to an improved understanding of the pathophysiology of the disorder. Human models of migraine attacks are indispensable tools in pathophysiological and therapeutic research. This review of neuroimaging methods and the attack-provoking nitroglycerin test is part an initiative by a task force within the EUROHEAD project (EU Strep LSHM-CT-2004-5044837-Workpackage 9) with the objective of critically evaluating neurophysiological tests used in migraine. The first part, presented in a companion paper, is devoted to electrophysiological methods, this second part to neuroimaging methods such as functional magnetic resonance imaging, positron emission tomography and voxel-based morphometry, as well as the nitroglycerin test. For each of these methods, we summarize the results, analyse the methodological limitations and propose recommendations for improved methodology and standardization of research protocols. [less ▲]

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See detailEvaluation and quality assessement of industrial floors
Courard, Luc ULg; Garbacz, Andrzej; Wolff, Lars

in Seidler, Peter (Ed.) Industrial floors (2006)

In the beginning of a project where repair, protection or reinforcement works are planed on industrial floors, the condition of the structure must be inspected and assessed properly. Which kind of ... [more ▼]

In the beginning of a project where repair, protection or reinforcement works are planed on industrial floors, the condition of the structure must be inspected and assessed properly. Which kind of expertise and qualifications are expected from the assessment consultant, depends on the structure, its environment and potential defects. The investigation must be thorough enough to get a reliable picture over the existence, extent, grade, reasons and effects of all significant degradation mechanisms and to assess their progress and effect on the essential requirements that the structure shall meet. The aim of this chapter is to present the general procedures to be followed in order to investigate the common situation of the industrial floors. As the testing procedures are very similar as well for concrete substrate than for overlay evaluation, the principles of the measurement are given hereafter, while the specific applications will be described in chapters 4.2., 4.3. and 4.4. Engineers generally require guidance on both the techniques available for the condition assessment of structures and the methods for data interpretation. Two major stages are usually recommended for such operation. The first stage is based on a rapid-scan visual assessment, often including limited sampling in areas obviously damaged, from which areas can be selected for more detailed investigations. The second stage contains detailed diagnostic survey relies on destructive and non destructive testing techniques. [less ▲]

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See detailEvaluation and ranking of different artificial recharge scenarii for controlling salt water intrusion in the Israeli coastal aquifer
Beaujean, Jean ULg

Master's dissertation (2007)

Coastal aquifers are under a continuous threat of pollution due to the danger of sea water intrusion. In many cases, this threat has become a reality, as a result of excessive pumping beyond some safe ... [more ▼]

Coastal aquifers are under a continuous threat of pollution due to the danger of sea water intrusion. In many cases, this threat has become a reality, as a result of excessive pumping beyond some safe yield. Israeli coastal aquifer is a good example. In some places around the world, existing wells, especially close to the coast, have to be abandoned, and the available fresh water of the coastal aquifer decreases. Also, the area above the intruding sea water wedge is lost as a source of water by natural recharge or natural replenishment. Artificial recharge may constitute a response against seawater intrusion. Because of over exploitation of pumping wells, hydraulic depressions appeared along the coast and seawater intrusion advanced inland. The topic of the thesis merges two methodologies linked to these problems. The first one aims the evaluation of different artificial recharge scenarii for controlling sea water intrusion in the Israeli coastal aquifer. Thus, two sites have been selected to apply the first methodology, namely Tel Aviv/Yafo city and Ashqelon town. Secondly, it concerns a new method to assess the vulnerability of pumping/injection wells facing with sea water intrusion and finally for ranking the different mentioned artificial recharge scenarii. The first of both of them is applied with the use of VASP and FEAS software including the existing model of the Israeli coastal aquifer and the second includes the DPSIR concept. VASP is a piece of software for the generation and post-processing of models in addition to the analysis and visualization of environmental data. FEAS is a piece of software that is based on the finite elements techniques, developed for simulating sea water intrusion in two- and three-dimensional coastal aquifers, and upconing problems. The second approach has been developed in prospect to be applied later once the necessary tools would be available. [less ▲]

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See detailEvaluation and validation of vulnerability concepts using a physically based approach
Brouyère, Serge ULg; Jeannin, Pierre-Yves; Dassargues, Alain ULg et al

in Mémoire des Sciences et Techniques de l'Environnement (2001), 13

Detailed reference viewed: 141 (25 ULg)