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See detailHow classroom teachers do take the ‘Physical Activity Pauses at School’ (PAPS)? A project implemented in Wallonia
Cloes, Marc ULg; Cloes, Stéphanie

Conference (2017, September 15)

In Wallonia, special efforts are needed in order to respect the international recommendations on physical activity in youth. School is definitely considered as a central pillar in the promotion of an ... [more ▼]

In Wallonia, special efforts are needed in order to respect the international recommendations on physical activity in youth. School is definitely considered as a central pillar in the promotion of an active lifestyle. The aim of this study was to analyze the implementation process of daily activity breaks called ‘Physical Activity Pause at School’ (PAPS) in 6 primary schools of the Liege area. 23 classroom teachers were involved. They had to propose at least one PAPS/day during the 15-16 school year. Diary, questionnaires, focus groups and interviews were used for data collecting. Two thirds of the subjects continued until the end. The videos were not systematically used. Four teachers’ profiles were identified: Innovators, Invested, Careful, and Disengaged. 12 factors facilitating or limitating the involvement of the teachers have been analyzed. The study comes to a model of concrete actions to respect in order to increase the chances of success in the implementation of such project. [less ▲]

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See detailRuralité et mondialisation dans l'oeuvre de Josef Winkler
Neelsen, Sarah ULg

Conference (2017, September 15)

Une œuvre à ce point enracinée dans le paysage, la culture et la langue de l’Autriche semblait peu propice à intégrer les bouleversements de l’ordre mondial après 1989 et son auteur bel et bien enfermé ... [more ▼]

Une œuvre à ce point enracinée dans le paysage, la culture et la langue de l’Autriche semblait peu propice à intégrer les bouleversements de l’ordre mondial après 1989 et son auteur bel et bien enfermé dans une certaine tradition nationale. Pourtant à partir de 1996, les récits de voyage, journaux intimes et romans sur l'Inde se multiplient. La mondialisation semble donc bien avoir eu un impact profond sur son travail et l'étude approfondie du roman Roppongi montre comment se construisent des effets de résonance entre rituels funéraires hindous et catholiques. Cette communication analyse les différences entre interculturalité et mondialisation, lieux et non-lieux et conclut sur la tension entre la mobilité des corps et l'obsession de l'image fixe. [less ▲]

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See detailEnvironmental sustainability of the Walloon cereal sector using Life Cycle Assessment (LCA) fed with local data - Current situation and potential evolution scenarios
Van Stappen, Florence ULg

Doctoral thesis (2017)

In a world facing a growing population and diminishing resources, agriculture has a major role to play in terms of sustainable provision of food and feed, job creation in rural areas, preservation of ... [more ▼]

In a world facing a growing population and diminishing resources, agriculture has a major role to play in terms of sustainable provision of food and feed, job creation in rural areas, preservation of natural resources and climate change mitigation. As a very intensive agricultural region, Wallonia (southern Belgium) dedicates more than half of its arable land to cereal crops. Thanks to a long history of research and development, rich soils and favorable climate conditions, yields of cereals such as wheat or barley cropped in Wallonia are amongst the highest in the world. As a major sector in the Walloon agricultural landscape, the cereal sector therefore calls for production and processing opportunities that meet the requirements for sustainable agriculture. In this context, the objectives of the present thesis were to evaluate the environmental sustainability of current and potential evolution scenarios for the Walloon cereal sector using the Life Cycle Assessment (LCA) methodology fed with local data. On the basis of current uses of cereals grown in Wallonia, this research aimed first at describing various scenarios for the future of the Walloon cereal sector. Based on contrasting hypotheses, four scenarios for the uses of Walloon cereals by 2030 were defined with the support of stakeholders involved in all parts of the sector. Issues such as competition between food uses (both direct and indirect) and non-food uses or Walloon dependency on cereal imports were addressed in these scenarios, which illustrate contrasting future situations, from food self-sufficiency to drastic globalization, through the development of new outlets combining changes in crop-growing practices and consumption habits and new technologies. Using the widely used, yet continuously improved, methodology of LCA, the second part of this work evaluated the environmental impacts of cereal production in Wallonia. It identified the production steps with the greatest contribution to environmental impacts. The leading contributor was mineral fertilizer production, for which this work used up-to-date data from best available technologies and demonstrated the importance of using such recent data. The second greatest contributor to environmental impacts was emissions from mineral and organic fertilizer use on field, before and during plant growth until harvest. As well as being very important, these emissions are also extremely variable, depending on agricultural practices, soil and weather conditions, and thus particularly difficult to assess. This is particularly true of nitrogen- and carbon-related emissions, whose dynamics are very problematic to evaluate. This work demonstrated the limits of commonly used emission models, which use generic emission factors and therefore weaken LCA results. As a result, the use of more specific models, based on field trials and adapted to local conditions, was placed at the top of the list for future research in this area. From a methodological point of view, this part of the work also confirmed the influence of the functional unit used to express LCA results. It showed the strong link between yield and environmental impacts, and identified cereal crops demonstrating efficient input management, with lower impacts per kilogram of product, per hectare and per euro. Other methodological choices, such as the choice of allocation factor between grain and straw, also showed their relevance. In short, this part of the work demonstrated the pertinence of using local data to feed LCAs of agricultural productions and identified the most sensitive parameters to be adjusted in priority to achieve good quality LCAs. Thirdly, on the basis of an original methodology comparing equivalent balanced animal diets, a case study on cereal processing in a biogas plant assessed the consequences of diverting feedstock from the animal feed industry into the bioenergy sector. Despite the environmental benefits brought by fossil fuel displacement and digestate use as organic fertilizer, the replacement of raw materials previously used as animal feed induces additional impacts potentially more important than the benefits of this technology. The key message from this finding is that it is urgent to stop using potentially edible raw material for bioenergy production. The only countervailing consideration here is that current trends towards decreasing meat consumption would in the longer term make lands and raw material available for purposes other than animal feed. The strength of all the LCA results in this work was tested using a wide range of sensitivity and uncertainty analyses. These good practices, often neglected due to time constraints, proved to be essential to be able to draw robust conclusions. Through the application of LCA to the Walloon cereal sector, this work had some practical implications for enhancing the quality of LCAs of agricultural productions. It showed the sensitivity of the method to the use of local data and demonstrated the strengths and limitations of the method. It has produced specific LCA references for cereal production in Wallonia, which are useful for feeding environmental impact assessments of cereal-based products sourced with Walloon cereal crops. Further improvements could include the use of specific models to assess on-field emissions from fertilizer use and the consideration of additional impact indicators regarding soil organic stock changes, biodiversity impacts and water consumption. Additionally, assessing impacts at the rotation scale would reflect more accurately the way farmers optimize their crops and allow for the evaluation of more diverse cropping systems. [less ▲]

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See detailOf trees and men: new insights into man-environment relationships in the moist forests of central Africa during the late Holocene
Morin, Julie ULg

Doctoral thesis (2017)

In central Africa, vegetation history has been documented by paleoenvironmental studies (especially palynology), which mainly concerned the way climate has shaped the forest landscapes. Human impacts in ... [more ▼]

In central Africa, vegetation history has been documented by paleoenvironmental studies (especially palynology), which mainly concerned the way climate has shaped the forest landscapes. Human impacts in this region have hardly been studied so far, especially at local scale. The main objective of this PhD is to propose an approach based on archaeology and the use of charred botanical remains found in soils, either wood charcoal or seeds, in order to document the Holocene anthropogenic impacts on the forest structure and composition. When coupled with the diachronic analysis of human activities, these land-use biomarkers can allow a better understanding of the relationship between man and his environment in central Africa during this period. Thereby, the first part of this PhD introduces the conceptual framework and the materials and methods used during the research. Then, the second part constitutes the core of the work, and presents the chronology of human activities in the northern Congo Basin, the use of biomarkers to discrimate between these activities, either domestic or agricultural, and the effect of the recent anthropogenic activities in the dynamic of several light-demanding tree populations. Finally, the third part draws the main recommendations of the work, and formulates potential for additional research. [less ▲]

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See detailPhysics at the Ultra-high Energies
Bhattacharya, Atri ULg

Scientific conference (2017, September 15)

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See detailThe Einstein Telescope
Cudell, Jean-René ULg

Speech/Talk (2017)

Brief description of the Einstein Telescope project.

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See detailDark matter
Laletin, Maxim ULg

Scientific conference (2017, September 15)

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See detailSharing good practices in physical education to promote physical activity, wellness and health
Bonni, Jérémy ULg; Cloes, Marc ULg

Poster (2017, September 15)

The Wallonia-Brussels Federation is about to overhaul its education system, which will directly affect teacher training. Under the “Pact for Excellence in Education”, a group of experts – the Consortium ... [more ▼]

The Wallonia-Brussels Federation is about to overhaul its education system, which will directly affect teacher training. Under the “Pact for Excellence in Education”, a group of experts – the Consortium “Physical Activities, Well-Being and Health” – drawn from the 12 French-speaking institutions training PE teachers (universities and colleges) has been mandated by the Ministry of Education to design devices and tools aiming at implementing the new common core curriculum that is under construction. Good practices have been identified then described in information sheets common to the different consortiums of the PEE and listed in a table that cross-references the 6 dimensions of physical activity at school (Snyers et al., 2014) and the 20 objects of teaching-learning in health education (Turcotte et al., 2011). These good practices are meant to be shared later within a community of practice. This paper provides a description of one of these information sheets in order to illustrate the methodology applied in this project. [less ▲]

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See detailCoronagraphy and Interferometry: Imaging the sky at high contrast and high-angular resolution
Defrere, Denis ULg; Absil, Olivier ULg

Scientific conference (2017, September 15)

Short overview of the main activities related to exoplanet imaging at the STAR Institute

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See detailPresentation of thermo-mechanical laboratory of CSL
Plesseria, Jean-Yves ULg

Scientific conference (2017, September 15)

Presentation of the Thermo-machanical group of CSL

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See detailExoplanetary Transits
Gillon, Michaël ULg

Scientific conference (2017, September 15)

Exoplanetary Transits

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See detailPresentation of CSL's Laboratory of Electronics at the First STAR Workshop on 15/09/2017
Graas, Estelle ULg

Scientific conference (2017, September 15)

Presentation of CSL's Laboratory of Electronics at the First STAR Workshop on 15/09/2017

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See detailQuasars and Gravitational lenses in STAR: Selected highlights
Sluse, Dominique ULg

Scientific conference (2017, September 15)

Quasars and Gravitational Lenses in STAR: Selected highlights

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See detailDesign, assembly and test of a near-infrared spectrograph for the TIGRE telescope
Kintziger, Christian ULg

Scientific conference (2017, September 15)

The presentation introduces the different major steps of the design of a near-infrared spectrograph that will be installed at the TIGRE telescope, Mexico.

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See detailFeasibility study of a UV Photometer on-board a 3U Cubesat for the study of bright massive stars
Desselle, Richard ULg

Scientific conference (2017, September 15)

Feasibility study of a UV Photometer on-board a 3U Cubesat for the study of bright massive stars

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See detailASTA -- Theoretical Stellar Astrophysics and Asteroseismology
Godart, Mélanie ULg

Scientific conference (2017, September 15)

Theoretical Stellar Physics and Asteroseismology

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See detailPresentation of CSL Signal Processing Laboratory - First STAR Workshop on 15/09/2017
Orban, Anne ULg

Scientific conference (2017, September 15)

Presentation of the Signal Processing laboratory of the Centre Spatial de Liège

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See detailMusic in the Operating Room
XHAUFLAIRE, Gaël ULg; Albert, Louisa; Gengoux, Monique

Poster (2017, September 15)

Listening to music during surgery has a subjective benefit to patients under local anesthesia. Its setting up during quiet routine oculoplastic surgery is easy and inexpensive. When subject to some ... [more ▼]

Listening to music during surgery has a subjective benefit to patients under local anesthesia. Its setting up during quiet routine oculoplastic surgery is easy and inexpensive. When subject to some elementary precautions, there is no increased risk. [less ▲]