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See detailLa transmission entre générations de l'héritage culturel et migratoire.
Mescoli, Elsa ULg

Conference given outside the academic context (2014)

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See detailAssessing the Thermal Performance of Bedouin Tents in Hot Climates
Attia, Shady ULg

in ASHRAE Energy & Indoor Environment for Hot Climates (2014, February 24)

The aims of this study it to improve conditions inside Bedouin tents shelters and to develop tools to assess shelter quality and comfort. A prototype tent was tested in hot conditions with an internal ... [more ▼]

The aims of this study it to improve conditions inside Bedouin tents shelters and to develop tools to assess shelter quality and comfort. A prototype tent was tested in hot conditions with an internal vapor load. Temperature, humidity measurements and air speed were taken inside the shelter while the external temperature was maintained at 40°C (104°F). Building performance simulation was conducted to produce a simulation model. A model of a tent was constructed using the EnergyPlus simulation software and were calibrated with the test data. The shelter models were simulated in Wadi Rum, Jordan using real data from. The feasibility of heating the tent using only the casual gains from occupants and solar radiation was investigated, although it was found that a tent heated in this way would only be appropriate in spring and autumn. Design issues included coping with stratification of air temperature inside the tent, improving thermal comfort without compromising fabricating the materials cheaply and simply. The validity of the results is limited by the lack of measured data for rates of air infiltration. [less ▲]

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See detailStrategic Decision Making For Zero Energy Buildings in Jordan
Attia, Shady ULg; Zawaydeh, Samer

in Proceedings of the 1st International Conference on Energy & Indoor Environment for Hot Climates (2014, February 24)

This paper presents the results of combined economic and computational study of different integrated passive and active design strategies for the Jordanian residential building sector. A representative ... [more ▼]

This paper presents the results of combined economic and computational study of different integrated passive and active design strategies for the Jordanian residential building sector. A representative house prototype, located in Amman is selected as a case study for the zero energy design and performance objective. The aim of the study is to investigate the potential of achieving thermal comfort and delivering thermal and electrical energy demands for existing buildings on site for different Jordanian Cities. Jordan has a semi-arid climate with an annual total irradiation above 2000 bankable kWh/m2 per year with approximately 2000 hours of full sunshine. Therefore, different passive and active design strategies are discussed and compared to reach an annual net zero energy demand for the existing building stock. In order to achieve zero energy buildings certain strategies are examined. For example, internal loads reduction, envelope insulation in addition to the installation of solar water heater and photovoltaic. Based on a month-by–month demand analysis, internal loads and envelope performance are analyzed in order to explore the existing economical potential. Simulation software DesignBuilder is used to examine the strategies proposed to achieve annual net zero energy performance for a prototype. The final result of this study compares the potential and constraints of each strategy and assesses them based on economical feasibility. For the considered location and weather conditions the prototype can provide thermal comfort for occupants and meets the zero energy objectives. The research also proofs that some strategies are cost effective rewarding with a payback period ranging from 3 to 9 years. [less ▲]

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See detailInvestigating the Impact of Different Thermal Comfort Models for Zero Energy Buildings in Hot Climates
Attia, Shady ULg; Hensen, JLM

in Proceeding of: Conference on Energy and Indoor Environment for Hot Climates (2014, February 24)

The selection of a thermal comfort model has a major impact on energy consumption of Net Zero Energy Buildings (NZEBs) in hot climates. The objective of this paper is to compare the influence of using ... [more ▼]

The selection of a thermal comfort model has a major impact on energy consumption of Net Zero Energy Buildings (NZEBs) in hot climates. The objective of this paper is to compare the influence of using different comfort models for zero energy buildings in hot climates. The paper compares the impact of applying Givoni’s model, ASHRAE 55 adaptive comfort standard, EN 15251 adaptive comfort standard and EN ISO 7730 on energy consumption and comfort. Using ZEBO and EnergyPlus for energy simulation, an existing prototype of a residential apartment module will be used to evaluate energy performance and thermal comfort in two parametric series. The first one is the result of coupling natural ventilation and mechanical cooling and the second one is guided coupling natural ventilation, mechanical cooling and ceiling fans. Results show a significant difference of cooling loads and total energy generation for the compared comfort models. However, the study remains theoretical and requires post occupancy evaluation for a better reliability of the results. [less ▲]

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See detailThe Usability of Green Building Rating Systems in Hot Arid Climates
Attia, Shady ULg

in ASHRAE Energy & Indoor Environment for Hot Climates (2014, February 24)

To develop adaptable and context sensitive building rating systems, the present work aimed to evaluate four rating systems that emerged recently in the Middle East. Literature review and cross comparison ... [more ▼]

To develop adaptable and context sensitive building rating systems, the present work aimed to evaluate four rating systems that emerged recently in the Middle East. Literature review and cross comparison analysis showed that the four examined rating systems namely, Green Pyramid Rating System (Egypt), Green Building Standard SI 5281 (Israel), Qatar Sustainability Assessment System (QSAS) and Pearl Building Rating System (UAE) are not enough adopted to local environmental, cultural, historical, societal and economic context. They showed also a comparable similarity since they all imitate the American LEED and British BREEAM rating systems. The paper elaborates on the comparison results and presents recommendations to improve the questioned rating systems and remind designers with the principles and strategies of sustainable design that goes beyond the existing rating systems in hot climate. The evaluation of the four systems might provide a new approach for regional harmonization among the four systems and the development of adaptable and context sensitive rating system. [less ▲]

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See detailVariabilité morphologique, génétique et chimique de Cananga odorata [Lam.] Hook.f. & Thoms. en vue de l'amélioration qualitative de la production de l'huile essentielle d'ylang-ylang dans les îles de l'Océan Indien
Benini, Céline ULg

Doctoral thesis (2014)

Summary: Cananga odorata (Lam.) Hook f. & Thomson forma genuina (Annonaceae) commonly called ylang-ylang is an essential oil tree used in the preparation of cosmetics. Despite this plant is an ... [more ▼]

Summary: Cananga odorata (Lam.) Hook f. & Thomson forma genuina (Annonaceae) commonly called ylang-ylang is an essential oil tree used in the preparation of cosmetics. Despite this plant is an indispensable source of incomes for the producing islands, and despite its essential oil is valued by the cosmetic industry, only few studies have been conducted. Ylang-ylang essential oil sector is dying and conservation and valorization strategies are urgently needed to preserve it. During this thesis, we tried to gather the necessary data to achieve this goal. We thus characterized the variability of ylang-ylang at morphological, genetic and chemical levels. This study revealed an important variability in the chemical composition of ylang-ylang essential oil in the study area. In order to suggest valorization and conservation strategies tailored to the current context, we needed to know the causes responsible for the chemical polymorphism. These causes are to be found probably in the environmental variability. Indeed, the genetic structure only revealed few consistencies with the chemical polymorphism. It would be though wiser to further investigate these two potential causes of the chemical variability of ylang-ylang as our study is pioneer in this field. On the basis of the data collected, we then proposed a market-oriented valorization of the genetic and chemical diversity (uniformity of the quality and the composition of ylang-ylang essential oils, raw material sources and quality labels). In terms of genetic and chemical conservation, we propose a conservation strategy mainly based on an on-farm conservation in plantation. We also propose integrated valorization strategies of the on-farm conservation (direct sales and tourism). [less ▲]

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See detailGradient Boosted Regression Trees in Scikit-Learn
Prettenhofer, Peter; Louppe, Gilles ULg

Conference (2014, February 23)

This talk describes Gradient Boosted Regression Trees (GBRT), a powerful statistical learning technique with applications in a variety of areas, ranging from web page ranking to environmental niche ... [more ▼]

This talk describes Gradient Boosted Regression Trees (GBRT), a powerful statistical learning technique with applications in a variety of areas, ranging from web page ranking to environmental niche modeling. GBRT is a key ingredient of many winning solutions in data-mining competitions such as the Netflix Prize, the GE Flight Quest, or the Heritage Health Price. We give a brief introduction to the GBRT model and regression trees -- focusing on intuition rather than mathematical formulas. The majority of the talk is dedicated to an in depth discussion how to apply GBRT in practice using scikit-learn. We cover important topics such as regularization, model tuning and model interpretation that should significantly improve your score on Kaggle. [less ▲]

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See detailHypoxia and biogeochemical processes concurrently impact acidification in a seasonally stratified coastal marine lake
Hagens, M; Slomp, CP; Meysman, FJR et al

Conference (2014, February 23)

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See detailPropos sur le Zinc
Pirard, Eric ULg

Conference given outside the academic context (2014)

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See detail1er Colloque Guy Namurois : Livre des résumés
Jidovtseff, Boris ULg; Halleux, Philippe; Lambert, Eric et al

in Jidovtseff, Boris (Ed.) 1er Colloque Guy Namurois : Livre des résumés (2014, February 22)

Colloque multi-disciplinaire en l'honneur de Guy Namurois

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See detailUtilisation d'une application internet pour quantifier la charge de travail chez le rugbyman de haut niveau
Paulus, Julien ULg; Laly, Arnaud; Guns, Sébastien et al

Poster (2014, February 22)

La détection précoce du dépassement (over-reching) (et du syndrôme de surentrainement) est capitale compte-tenu de ses effets négatifs sur la performance. Dans ce processus, le contrôle individuel de la ... [more ▼]

La détection précoce du dépassement (over-reching) (et du syndrôme de surentrainement) est capitale compte-tenu de ses effets négatifs sur la performance. Dans ce processus, le contrôle individuel de la charge d'entrainement du joueur est indispensable. [less ▲]

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See detailTraitement antihypertenseur : quelles sont les meilleures associations?
Krzesinski, Jean-Marie ULg

Conference (2014, February 22)

Stratégie du traitement de l’HTA en 2014: toujours basée sur le calcul du risque CV. L’HTA, tueur silencieux, est généralement associée à de nombreux autres facteurs de risque CV. Il faut préciser le ... [more ▼]

Stratégie du traitement de l’HTA en 2014: toujours basée sur le calcul du risque CV. L’HTA, tueur silencieux, est généralement associée à de nombreux autres facteurs de risque CV. Il faut préciser le niveau de risque CV en tenant compte de la valeur de PA et des autres F.R. pour décider le moment et le type de traitement ! [less ▲]

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See detailZur Kontinuitätsproblematik in der ostbelgischen Nachkriegszeit
Brüll, Christoph ULg

Conference (2014, February 22)

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See detailLe contrôle moteur lombopelvien du joueur de footbal élite
GROSDENT, Stéphanie ULg; Demoulin, Christophe ULg; Namurois, Guy et al

in Abstarct Book de la 1ère Journée Guy Namurois (2014, February 22)

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See detailAVIS DES ARBITRES DE BASKET-BALL DE SEPT PAYS EUROPÉENS SUR LEUR ÉVALUATION PHYSIQUE
Van Hoye, Martin ULg; Cloes, Marc ULg

Scientific conference (2014, February 22)

Le test Léger est-il adapté aux efforts fournis par les arbitres de basket-ball au cours d'une rencontre ? Quels sont les avis des arbitres à ce niveau ? Quels tests plus adaptés pourraient être réalisés ?

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