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See detailHow to determine the place provided to physical activity in a primary school? An attempt to identify objective variables
Mouton, Alexandre ULg; Boone, Pauline; Cloes, Marc ULg

in Revista Espaňola de Educación Física y Deportes (2015, July), 410-S

In the fight against sedentariness, recent meta analyses underlined the determining role of school as a foundation for physical activity (PA) promotion in children and adolescents (Biddle et al. 2012 ... [more ▼]

In the fight against sedentariness, recent meta analyses underlined the determining role of school as a foundation for physical activity (PA) promotion in children and adolescents (Biddle et al. 2012). Consequently, active schools projects are implemented worldwide.. They combine actions on several parallel axes with the physical education (PE) teacher as a corner stone. One of the challenges of such interventions is to follow the modifications and measure their effects. Moreover, it seems that practitioners and researchers still need an instrument to ascertain the real place provided to PA in a school. The aim of this presentation consists in describing the development, validation and testing of an instrument designed to provide such feedback. This study respects a qualitative approach and, by its step by step process, could be considered as an action research approach. Its main goal is to produce an audit instrument rather than providing data. Five successive steps were designed: Analysis of the literature in order to select the main dimensions to analyze; Development of a provisional tool based on objective items; Pilot study; Validation by a group of 13 experts; Testing of the final version in a school. The analysis was focused on the school policy and involved the principal, the PE teacher and the classroom teachers. 335 items were identified and spread across six dimensions. The experts underlined the validity and completeness of the instrument. For the practitioners, participating to the data collection is a means to become aware of what the school (should) propose. This study points out the large range of variables involved in the development of a PA school project, and bring forward the limitation of an assessment using objective data. It underlines that an audit process contributes to a more relevant perception of the reality. Practitioners would also be interested by an easier-to-use tool. [less ▲]

Detailed reference viewed: 84 (12 ULg)
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See detailHow to diagnose atypical myopathy
Votion, Dominique ULg

in In proceedings: 50th British Equine Veterinary Association (BEVA) Congress (2011, September 08)

Detailed reference viewed: 52 (14 ULg)
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See detailHow to Discount Deep Reinforcement Learning: Towards New Dynamic Strategies
François-Lavet, Vincent ULg; Fonteneau, Raphaël ULg; Ernst, Damien ULg

in NIPS 2015 Workshop on Deep Reinforcement Learning (2015, December)

Using deep neural nets as function approximator for reinforcement learning tasks have recently been shown to be very powerful for solving problems approaching real-world complexity. Using these results as ... [more ▼]

Using deep neural nets as function approximator for reinforcement learning tasks have recently been shown to be very powerful for solving problems approaching real-world complexity. Using these results as a benchmark, we discuss the role that the discount factor may play in the quality of the learning process of a deep Q-network (DQN). When the discount factor progressively increases up to its final value, we empirically show that it is possible to significantly reduce the number of learning steps. When used in conjunction with a varying learning rate, we empirically show that it outperforms original DQN on several experiments. We relate this phenomenon with the instabilities of neural networks when they are used in an approximate Dynamic Programming setting. We also describe the possibility to fall within a local optimum during the learning process, thus connecting our discussion with the exploration/exploitation dilemma. [less ▲]

Detailed reference viewed: 154 (42 ULg)
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See detailHow to do percutaneous ultrasound-guided liver biopsy in the adult horse
Busoni, Valeria ULg

in XIV SIVE / FEEVA Congress Proceedings (2008)

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See detailHow to encourage conservators to produce knowledge. The CeROArt ‘lab’: Looking back at ten years of experience
Verbeeck, Muriel ULg

in Bridgland, Janet (Ed.) Linking Past and Future (2017, September)

Knowledge transmission through a scientific publication is something that can be taught and learned. The CeROArt journal started a project that it has supported and developed over the past ten years to ... [more ▼]

Knowledge transmission through a scientific publication is something that can be taught and learned. The CeROArt journal started a project that it has supported and developed over the past ten years to provide educational support to first-time authors who have graduated in conservation, to encourage them to publish their work. This experience, conducted in Open Access with the support of several European training courses, highlights the skills acquired at the end of their studies in terms of scientific communication. It can also be used to consider several avenues for stimulating knowledge pro- duction outside the academic environment. [less ▲]

Peer Reviewed
See detailHow to enhance citizenship and reduce dysfunctional patient behavior during service interactions: An empirical study in the nursing context
Lerch, Jennifer; Schmitz, Gertrud; Büttgen, Marion et al

Conference (2016, June)

Detailed reference viewed: 30 (1 ULg)
See detailHow to enhance the performance of OSH services ?
Mairiaux, Philippe ULg

Conference (2010, November 23)

Detailed reference viewed: 12 (1 ULg)
See detailHow to expand method by and for sensory: trials along and beside fieldwork
Vangeebergen, Thomas ULg

Conference (2016, September 01)

In a research with sensory analysts and flavourists, I tried other ways of interview (e.g. people auto-confrontations to their own registered activity) and other mediums to relate to the ethnographical ... [more ▼]

In a research with sensory analysts and flavourists, I tried other ways of interview (e.g. people auto-confrontations to their own registered activity) and other mediums to relate to the ethnographical work, as graphic novel or comics. [less ▲]

Detailed reference viewed: 17 (3 ULg)
See detailHow to exploit bio- and CO2-based isocyanates-free polyurethanes for environmental and biomedical applications?
Gennen, Sandro ULg; Grignard, Bruno ULg; Alves, Margot et al

Poster (2017, May 04)

Polyurethane (PU) is one of the most important family of polymers that is largely used in coatings, foams, elastomers, sealants/adhesives in the building, automotive, household and biomedical sectors ... [more ▼]

Polyurethane (PU) is one of the most important family of polymers that is largely used in coatings, foams, elastomers, sealants/adhesives in the building, automotive, household and biomedical sectors. Classically, PU is produced by a step-growth polymerization between di- or polyols and di- or polyisocyanates. However, isocyanates are toxic and produced from even more toxic phosgene. To avoid the use of isocyanates, different synthetic alternatives for PUs have been developed. One of the most studied approaches relies on the step-growth polymerization between di- or polyamines and CO2-sourced di- or polycyclic carbonates, affording poly(β-hydroxyurethane)s (PHUs) that showed improved thermal, chemical and mechanical properties compared to conventional PUs. In this study, we would like to show how PHUs can be exploited to design (bio- and) CO2-based foams for thermal insulation as well as novel reinforced hydrogels for potential biomedical applications. First, we developed a highly efficient binary organocatalyst for the fast and selective synthesis of cyclic carbonates under very mild conditions from CO2 and various epoxides, including bio-based ones. Secondly, these cyclic carbonates were valorised as monomers for the preparation of foams and hydrogels based on PHUs. In this poster, we will describe the preparation and characterization of these PHU foams and hydrogels, and highlight their huge potential as thermal insulating materials (PHU foams) or as biomaterials for shock absorption properties (PHU hydrogels). [less ▲]

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See detailHow to extract the oscillating components of a signal? A wavelet-based approach compared to the Empirical Mode Decomposition
Deliège, Adrien ULg

Scientific conference (2017, February 07)

Researchers are often confronted with time series that display pseudo-periodic tendencies with time-varying amplitudes and frequencies. In that framework, a classic Fourier analysis of the data may be of ... [more ▼]

Researchers are often confronted with time series that display pseudo-periodic tendencies with time-varying amplitudes and frequencies. In that framework, a classic Fourier analysis of the data may be of limited interest, especially if the objective is to derive components from the signal that capture the non-stationary behaviour of the oscillating factors. In this talk, we present two powerful tools designed to extract amplitude modulated-frequency modulated (AM-FM) components from a given signal. The first one is the renowned Empirical Mode Decomposition (EMD); we explain the technique, its main benefits, limitations and major practical uses. Then, we introduce the continuous wavelet transform and the equations that justify its relevance in the present context. We propose an algorithm based on the wavelet-induced time-frequency representation of a signal to extract its main components. The performances of this method are compared with the EMD on various AM-FM signals exhibiting different particularities. After briefly broaching the problem of edge effects, we investigate whether the wavelet-based procedure can be used in the domain of time series forecasting. For that purpose, we study the El Nino Southern Oscillation index and develop a model aimed at predicting the long-term trends of the signal. Its predictive skills are tested in several ways and exposed in the final part of the talk. [less ▲]

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See detailHow to face failure to growth in dogs and cats?
Peeters, Dominique ULg

in Proceedings of the first Belgium International Congress for Small Animal Veterinarians (Canifelis 2007) (2007, January)

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See detailHow to generate regularly behaved production data? A Monte Carlo experimentation on DEA scale efficiency measurement
Santin, Daniel; Perelman, Sergio ULg

in European Journal of Operational Research (2009), (199), 303-310

Monte Carlo experimentation is a well-known approach used to test the performance of alternative methodologies under different hypotheses. In the frontier analysis framework, whatever the parametric or ... [more ▼]

Monte Carlo experimentation is a well-known approach used to test the performance of alternative methodologies under different hypotheses. In the frontier analysis framework, whatever the parametric or non-parametric methods tested, experiments to date have been developed assuming single output multi-input production functions. The data generated have mostly assumed a Cobb–Douglas technology. Among other drawbacks, this simple framework does not allow the evaluation of DEA performance on scale efficiency measurement. The aim of this paper is twofold. On the one hand, we show how reliable two-output two-input production data can be generated using a parametric output distance function approach. A variable returns to scale translog technology satisfying regularity conditions is used for this purpose. On the other hand, we evaluate the accuracy of DEA technical and scale efficiency measurement when sample size and output ratios vary. Our Monte Carlo experiment shows that the correlation between true and estimated scale efficiency is dramatically low when DEA analysis is performed with small samples and wide output ratio variations. [less ▲]

Detailed reference viewed: 47 (6 ULg)
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See detailHow to get rid of the two spotted spider mites?
Attia, Sabrine; Grissa, Kaouthar Lebdi; Heuskin, Stéphanie ULg et al

in Revue des Régions Arides (2014), 35(3), 1739-1748

Two essential oils were tested for their toxicity against eggs and adults of Tetranychus urticae Koch as well as adults of Phytoseiulus persimilis Athias-Henriot, by using a filter paper diffusion ... [more ▼]

Two essential oils were tested for their toxicity against eggs and adults of Tetranychus urticae Koch as well as adults of Phytoseiulus persimilis Athias-Henriot, by using a filter paper diffusion bioassay without allowing direct contact. Responses varied according to oil type and dose, and mite species. The chemical analyses with GC-MS and GC-FID revealed that the two oils differed in their most abundant components. The most abundant components in the Citrus oil were linalyl acetate (41.95%), sabinene (18.60%) and linalool (18.14%) whereas pulegone (41.86%) and menthone (28.33%) were most prevalent in the Mentha oil. Mortality and fecundity were measured with 15 oils concentrations ranged from 0.01 to 8μl/l of air. Tetranychid mortality increased with increasing concentrations with LC50 value of 5.39 and 4.09 μl/l for C. aurantium and M. pulegium, respectively. However few mortality was observed in the case of P. persimilis with LC50 value of 0.46 and 0.26 μl/l for C. aurantium and M. pulegium respectively. For both oils a reduction of fecundity was observed at 0.01 μ/l in the case of T. urticae. The essential oils described herein have potential interest as fumigants for the bio-control of T. urticae. [less ▲]

Detailed reference viewed: 56 (2 ULg)
See detailHow to get the most information out of your necropsy
Jauniaux, Thierry ULg; Coignoul, Freddy ULg

in COST Meeting proceedings (2002)

Detailed reference viewed: 15 (0 ULg)