50 research outputs found

    A method for the retrofitting of pre-1914 Walloon dwellings with heritage value

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    The sustainable energy renovation of historical buildings and listed heritage is a challenge for Belgium and other European countries. These are crucial for urban and rural development and for the future of old buildings. This is the context of the ‘P-RENEWAL’ research project. It aims to develop a methodological tool for retrofitting historical Walloon dwellings built before 1914, to enhance their heritage values while implementing relevant energy measures. The originality of this research is to consider energy, environmental and heritage aspects in a complementary way, in order to help designers achieving a goal of greater sustainability. According to the listed heritage administration, dwelling types built before 1914 represent approximately 25 % of the Walloon stock. This project is related to the research work carried out under the Task 59 of SHC ‘Renovating Historic Buildings Towards Zero Energy’. The methodology used to achieve the research objectives is articulated in various steps. First, a typological analysis of buildings from the interest era is completed. Then, based on on-site studies performed on representative case studies, the evaluations of heritage values and performance are conducted. Finally, dynamic energy models are run to support the proposition and validation of retrofitting strategies

    Heritage value combined with energy and sustainable retrofit: representative types of old Walloon dwellings built before 1914

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    Energy and sustainable retrofit of old buildings with heritage value is a challenging issue for Europe. The research project “P-RENEWAL” aims to develop a methodological tool for energy and sustainable retrofit of Walloon dwellings built before 1914, with heritage value. The present contribution will mainly discuss the methodology used to identify building typology and will also submit a detailed description of several building types. This methodology can be applied in other contexts to provide any user with data on different scales, from the building to the entire city, helping to make sustainable decisions

    Combining multi-view photogrammetry and wireless sensor networks when modelling the hygrothermal behaviour of heritage buildings

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    The construction sector has now entered the 'Digital era', and professionals are slowly getting familiar with many of these innovative technologies. This paper shows how such innovations improve the investigation phase when it comes to energy retrofits on heritage buildings. More specifically, multi-view photogrammetry and wireless sensor networks can facilitate the implementation and enhance the relevance of building hygrothermal and energy simulations: photogrammetry quickens up the reproduction of the building geometry whereas wireless sensor networks facilitate and enlarge the collection of data relative to the existing behaviour of an occupied building. This paper explores the benefits of using those two technologies compared to more traditional solutions, regarding data quality and general workflow. In this purpose, two case studies from research projects ongoing in Belgium are briefly described

    Combining multi-view photogrammetry and wireless sensor networks when modelling the hygrothermal behaviour of heritage buildings

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    The sustainable energy renovation of historical buildings is a challenge for all European countries. It is crucial for their conservation as well as for urban and rural development. Nonetheless, proposing adequate interventions requires appropriate investigation efforts. This paper presents a specific approach for performing the energy diagnosis of occupied historical buildings, developed under the contraints of several ongoing research projects. It is shown how photogrammetry and wireless sensor networks can be combined to produce rich datasets, while keeping disturbances for occupants at a minimum. Within this multi-disciplinary investigation program, the focus is also put on the production of input and validation data for implementing dynamic energy simulations. A case study is presented to illustrate the deployment of the proposed methodology. Only two site visits allowed to capture a large quantity of descriptive and performance information, which was valorized through clear protocols for sampling and formatting the data

    Modifications of the endosomal compartment in peripheral blood mononuclear cells and fibroblasts from Alzheimer’s disease patients

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    International audienceIdentification of blood-based biomarkers of Alzheimer’s disease (AD) remains a challenge. Neuropathological studies have identified enlarged endosomes in post-mortem brains as the earliest cellular change associated to AD. Here the presence of enlarged endosomes was investigated in peripheral blood mononuclear cells from 48 biologically defined AD patients (25 with mild cognitive impairment and 23 with dementia (AD-D)), and 23 age-matched healthy controls using immunocytochemistry and confocal microscopy. The volume and number of endosomes were not significantly different between AD and controls. However, the percentage of cells containing enlarged endosomes was significantly higher in the AD-D group as compared with controls. Furthermore, endosomal volumes significantly correlated to [C11]PiB cortical index measured by positron emission tomography in the AD group, independently of the APOE genotype, but not to the levels of amyloid-beta, tau and phosphorylated tau measured in the cerebrospinal fluid. Importantly, we confirmed the presence of enlarged endosomes in fibroblasts from six unrelated AD-D patients as compared with five cognitively normal controls. This study is the first, to our knowledge, to report morphological alterations of the endosomal compartment in peripheral cells from AD patients correlated to amyloid load that will now be evaluated as a possible biomarker

    Problématiques des hydrocarbures aromatiques polycycliques dans les corps gras

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    La prĂ©sence des hydrocarbures aromatiques polycycliques (HAP) dans les huiles vĂ©gĂ©tales peut provenir de diffĂ©rentes sources, mais gĂ©nĂ©ralement les huiles contaminĂ©es sont issues de matiĂšres premiĂšres nĂ©cessitant d’ĂȘtre sĂ©chĂ©es telles que les pĂ©pins de raisin, le coprah ou les grignons d’olive. Actuellement, il n’y a pas de rĂ©glementation europĂ©enne limitant la teneur en HAP dans les produits alimentaires mais un Code de Bonnes Pratiques a Ă©tĂ© Ă©tabli par FEDIOL 1. La dĂ©termination de la totalitĂ© des HAP prĂ©sents dans les corps gras est rendue dĂ©licate par le faible niveau de chaque PAH Ă  quantifier et la complexitĂ© des Ă©tapes d’extraction et de purification. La seule mĂ©thode faisant l’objet d’une norme (NF EN ISO 15302) concerne la dĂ©termination de la teneur en benzo[a]pyrĂšne. Un projet de mĂ©thode fourni par l’ITERG est en cours d’évaluation dans le cadre des travaux du Sous-ComitĂ© ISO\\TC34\\SC11 des « Corps gras d’origines animale et vĂ©gĂ©tale ». Cette mĂ©thode permet la quantification de 12 HAP dans les corps gras, avec une limite de quantification de 0,2 Όg\\kg pour tous les composĂ©s analysĂ©s, Ă  l’exception des fluoranthĂšne et benzo[g,h,i]pĂ©rylĂšne oĂč celle-ci est de 0,3 Όg\\kg, ainsi que de l’indĂ©no[1,2,3-cd]pyrĂšne pour lequel la limite de quantification atteint 1 Όg\\kg. Depuis quatre ans, les travaux de l’ITERG sur les HAP ont Ă©tĂ© centrĂ©s sur l’optimisation et la normalisation d’une procĂ©dure d’analyse (ISO\\CD 15753), sur l’estimation du niveau de contamination des huiles vĂ©gĂ©tales produites en France et sur l’effet du raffinage sur le niveau en HAP. Chaque Ă©tape de ce travail est dĂ©veloppĂ©e ici

    Problématiques des hydrocarbures aromatiques polycycliques dans les corps gras

    No full text
    La prĂ©sence des hydrocarbures aromatiques polycycliques (HAP) dans les huiles vĂ©gĂ©tales peut provenir de diffĂ©rentes sources, mais gĂ©nĂ©ralement les huiles contaminĂ©es sont issues de matiĂšres premiĂšres nĂ©cessitant d’ĂȘtre sĂ©chĂ©es telles que les pĂ©pins de raisin, le coprah ou les grignons d’olive. Actuellement, il n’y a pas de rĂ©glementation europĂ©enne limitant la teneur en HAP dans les produits alimentaires mais un Code de Bonnes Pratiques a Ă©tĂ© Ă©tabli par FEDIOL 1. La dĂ©termination de la totalitĂ© des HAP prĂ©sents dans les corps gras est rendue dĂ©licate par le faible niveau de chaque PAH Ă  quantifier et la complexitĂ© des Ă©tapes d’extraction et de purification. La seule mĂ©thode faisant l’objet d’une norme (NF EN ISO 15302) concerne la dĂ©termination de la teneur en benzo[a]pyrĂšne. Un projet de mĂ©thode fourni par l’ITERG est en cours d’évaluation dans le cadre des travaux du Sous-ComitĂ© ISO\\TC34\\SC11 des « Corps gras d’origines animale et vĂ©gĂ©tale ». Cette mĂ©thode permet la quantification de 12 HAP dans les corps gras, avec une limite de quantification de 0,2 Όg\\kg pour tous les composĂ©s analysĂ©s, Ă  l’exception des fluoranthĂšne et benzo[g,h,i]pĂ©rylĂšne oĂč celle-ci est de 0,3 Όg\\kg, ainsi que de l’indĂ©no[1,2,3-cd]pyrĂšne pour lequel la limite de quantification atteint 1 Όg\\kg. Depuis quatre ans, les travaux de l’ITERG sur les HAP ont Ă©tĂ© centrĂ©s sur l’optimisation et la normalisation d’une procĂ©dure d’analyse (ISO\\CD 15753), sur l’estimation du niveau de contamination des huiles vĂ©gĂ©tales produites en France et sur l’effet du raffinage sur le niveau en HAP. Chaque Ă©tape de ce travail est dĂ©veloppĂ©e ici

    Classifications satellitaires RaDAR et optiques des récifs biogéniques intertidaux : Sentinel-1, -2 et Pléiades-1

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    International audienceUtilisation de la télédétection satellitaire multi-source RaDAR et optique à l'échelle paysagÚre: 1. Classifier la probabilité de présence des hermelles, 2. Quantifier la contribution des diverses bandes spectrales
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