Search results for "RISA"
showing 10 items of 788 documents
A sustainable replacement for TiO2 in photocatalyst construction materials: Hydroxyapatite-based photocatalytic additives, made from the valorisation…
2018
The use of waste materials and by-products in building materials is of increasing importance to improve sustainability in construction, as is the incorporation of photocatalytic materials to both combat atmospheric pollution and protect the structures and façades. This work reports the innovative use of photocatalytic hydroxyapatite (HAp) based powders, derived from Atlantic codfish bone wastes, as an additive to natural hydraulic lime mortars. HAp is the main component of bone, and hence is non-toxic and biocompatible. This is the first time that such a calcium phosphate-based photocatalyst, or indeed any fish/marine derived wastes, have been added to building materials. A key factor is th…
Flexicurité ou précarité ?
2007
07019 - 16 p.; National audience; En combinant l'étude des conditions de travail avec celle des stratégies d'entreprise dans trois environnements institutionnels européens contrastés, sont présentées les spécificités du métier de femme de chambre, figure emblématique des travailleurs à bas salaire dont le risque de précarisation, voire d'exclusion, est omniprésent.
Théorie du capital humain et analyse des scolarisations : une application au cas du système éducatif français
1980
International audience; L’article cherche à expliquer la très grande variance qu’on observe en matière de scolarisation individuelle. Après avoir proposé des estimations des rendements de l’investissement éducatif aux différents niveaux et conclu à l’insuffisance de la théorie du capital humain sous sa forme initiale pour rendre compte des faits, une tentative est menée pour interpréter les décisions éducatives en essayant de séparer les effets cognitifs des effets sociaux. Des estimations opérées à partir de l’enquête longitudinale de l’INED indiquent que les effets cognitifs ont une part relativement faible (25 %) dans l'explication, alors que les conditions économiques familiales semblen…
Czynności notarialne online – podstawy de lege lata i uwagi de lege ferenda
2020
The text attempts to conceptualize the possible reform of the procedure of making notarial deeds in Poland. It examines the feasibility of drafting and signing these deeds in the course of online communication between parties. The analysis builds on the significant constraints for the classic notarial procedure (based on paper documents and on the physical presence of a notary and parties) that were triggered by the Covid-19 pandemic. Its aim reaches, however, further beyond the present-day realities and seeks possible ways to generally modernize provisions on notarial deeds and to adjust them to the growing proliferation of online communication in the society. The text ascertains that the …
“Water Association” Band in Saccharide Amorphous Matrices: Role of Residual Water on Bioprotection
2021
Saccharides protect biostructures against adverse environmental conditions mainly by preventing large scale motions leading to unfolding. The efficiency of this molecular mechanism, which is higher in trehalose with respect to other sugars, strongly depends on hydration and sugar/protein ratio. Here we report an Infrared Spectroscopy study on dry amorphous matrices of the disaccharides trehalose, maltose, sucrose and lactose, and the trisaccharide raffinose. Samples with and without embedded protein (Myoglobin) are investigated at different sugar/protein ratios, and compared. To inspect matrix properties we analyse the Water Association Band (WAB), and carefully decompose it into sub-bands,…
Reusing coffee ground waste in manufacture of novel sustainable product
2021
Coffee is one of the most important commodities in the world. Every year the coffee industry is responsible for generating a large amount of wastes, mainly Spent Coffee Grounds (SCGs). The traditional disposal of this residue into the environment should be avoided due to its toxicity and organic character. Because of the decrease in nonrenewable natural resources, society has been making a huge effort to valorize and reuse several types of wastes in the production of novel sustainable products. In this regard, construction is considered one of the most energy-intensive sectors. As a consequence, the goals of sustainability and energy efficiency must be prosecuted to achieve the results expe…
Estimation of the spatially distributed surface energy budget for AgriSAR 2006, part I : remote sensing model intercomparison
2011
A number of energy balance models of variable complexity that use remotely sensed boundary conditions for producing spatially distributed maps of surface fluxes have been proposed. Validation typically involves comparing model output to flux tower observations at a handful of sites, and hence there is no way of evaluating the reliability of model output for the remaining pixels comprising a scene. To assess the uncertainty in flux estimation over a remote sensing scene requires one to conduct pixel-by-pixel comparisons of the output. The objective of this paper is to assess whether the simplifications made in a simple model lead to erroneous predictions or deviations from a more complex mod…
Pertinence des SI territoriaux pour la scénarisation énergétique : démonstration par l’exemple de l’exploitation du SI OPTEER appliqué à l’éco-mobili…
2018
International audience; Dans le cadre de l’ambition REPOS de la région Bourgogne-Franche-Comté, il est primordial de pouvoir scénariser l’évolution de son profil énergétique. Cependant à des échelles infrarégionales, la connaissance et la prise en compte des contextes territoriaux est essentielle pour pouvoir estimer la faisabilité et la pertinence de politiques énergétiques territoriales. Notre étude pose les bases d’une approche multicritère d’aide à la décision en utilisant le système d’information et d’observation OPTEER et ses différentes fonctionnalités ainsi que des données prospectives. L’étude porte sur la mobilité au bioGNV en Franche-Comté et sur l’analyse des impacts qu’aurait u…
Review of wind tunnel modelling of flow and pollutant dispersion within and from naturally ventilated livestock buildings
2021
[EN] Ammonia emissions from naturally ventilated livestock buildings (NVLBs) pose a serious environmental problem. However, the mechanisms that control these emissions are still not fully understood. One promising method for understanding these mechanisms is physical modelling in wind tunnels. This paper reviews studies that have used this method to investigate flow or pollutant dispersion within or from NVLBs. The review indicates the importance of wind tunnels for understanding the flow and pollutant dispersion processes within and from NVLBs. However, most studies have investigated the flow, while only few studies have focused on pollutant dispersion. Furthermore, only few studies have s…
Effect of the applied organic load rate on biodegradable polymer production by mixed microbial cultures in a Sequencing Batch Reactor
2006
This article studies the operation of a new process for the production of biopolymers (polyhydroxyalkanoates, PHAs) at different applied organic load rates (OLRs). The process is based on the aerobic enrichment of activated sludge to obtain mixed cultures able to store PHAs at high rates and yields. A mixture of acetic, lactic, and propionic acids at different concentrations (in the range 8.5-31.25 gCOD/L) was fed every 2 h in a sequencing batch reactor (SBR). The resulting applied OLR was in the range 8.5-31.25 gCOD/L/day. Even though, as expected, the increase in the OLR caused an increase in biomass concentration (up to about 8.7 g COD/L), it also caused a relevant decrease of maximal po…