Search results for "dab"
showing 10 items of 1280 documents
FITNESS, première plateforme européenne sur l’emballage et le conditionnement des aliments
2019
National audience; FITNESS (2017-2020) est un projet financé dans le cadre du programme européen Erasmus+. Le but de ce projet est de mettre en place une plateforme virtuelle proposant librement des contenus interactifs (présentations, guides, quizz, webinaires, outils de calcul) en lien avec l’emballage alimentaire et les problématiques de conditionnement des aliments. L’objectif est d’offrir un contenu permettant de comprendre les principes et les enjeux (modules de base), et d’apprendre des techniques plus avancées permettant de maîtriser les impacts ou la sécurité sanitaires des matériaux utilisés (modules avancés). La plateforme s’adresse aussi bien aux étudiants, enseignants et profes…
Les emballages biodégradables : durée de vie du produit ou durée de vie de l’emballage ? Exemple du PLA
2019
National audience; Parmi les matériaux d’emballages issus de ressources renouvelables, il est important de bien différencier ceux qui sont biosourcés mais non biodégradables (souvent analogues aux matériaux conventionnels pétrosourcés) de ceux qui sont à la fois biosourcés et biodégradables. Pour ces derniers, la question de leur stabilité au contact des produits alimentaires s’avère alors cruciale. Le cas du poly(lactide), ou PLA, est détaillé ici, en prenant en compte non seulement sa stabilité chimique, mais aussi sa stabilité physique. Se pose alors la question de la durée de vie de l’emballage en parallèle de celle de la durée de vie de l’aliment emballé.
Enseñanza de las ciencias : revista de investigación y experiencias didácticas
1993
Resumen basado en el de la publicación Resumen en inglés ¿La educación sanitaria es lo mismo que la educación para la salud? ¿Qué factores hay que tener en cuenta al configurar un plan de estudios para la educación de la salud? ¿Es necesario tratar asuntos de salud tales como higiene, vacunaciones, etc., para desarrollar este tipo de educación para las escuelas? Estas son solo algunas de las preguntas que se plantean y se muestra el uso de fuentes que determinan un plan de estudios, como en el caso específico de Alimentación-Nutrición. ESP
Efficacy of lumen-apposing metal stents or self-expandable metal stents for endoscopic ultrasound-guided choledochoduodenostomy: a systematic review …
2020
Abstract Background Endoscopic ultrasound (EUS)-guided biliary drainage is becoming an option for palliation of malignant biliary obstruction. Lumen-apposing metal stents (LAMS) are replacing self-expandable metal stents (SEMS). The aim of this meta-analysis was to evaluate the efficacy and safety of LAMS and SEMS for EUS-guided choledochoduodenostomy (EUS-CDS). Methods A meta-analysis was performed using PRISMA protocols. Electronic databases were searched for studies on EUS-CDS. The primary outcome was clinical success. Secondary outcomes were technical success, reintervention, and adverse events. We used the random effects model with the DerSimonian–Laird estimation, and the results were…
Performance Analysis of Basic Turbo-Roundabouts in Urban Context
2012
AbstractA turbo roundabout is a new type of canalized multilane intersection in which the physical separation between lanes helps to prevent side collisions when crossing the roundabout. This paper presents an estimation of capacity, delays and level of service of basic turbo roundabouts in undersaturation conditions, considering both vehicle flow and pedestrian traffic. The traffic performance model was developed by evaluating the capacity for each entry lane. Owing to the geometric features of the intersection, the total entry capacity is obtained by considering different values of the pedestrian impedance factor and degree of saturation at both the right-turn and left-turn lanes.
Assessment of organic waste management methods through energy balance
2014
In Italy, the Organic Fraction of Municipal Solid W aste (OFMSW) is nowadays landfilled or processed through aerobic composting. The Italian towns curre ntly support a high cost for OFMSW disposal and cause a high environmental impact, because of long distance s travelled from towns to a few available landfills and fewer treatment places, as well as the used waste m anagement methods. An interesting option for OFMSW is Anaerobic Digestion (AD), producing biogas and “digestate”. In this survey a theoretical biogas plant was placed near a town of Sicily Region (Italy), centra lised with reference to the area considered for pro ducing OFMSW. The distances travelled every year to transport OFMS…
Estimation of air pollutant emissions in flower roundabouts and in conventional roundabouts
2013
Abstract The road pollutant emissions, above all in urban context, are correlated to many infrastructural parameters and to traffic intensity and typology. The research work on road junction geometry, carried out in European research centres, has recently allowed to design new road intersection types which are of undoubted interest, especially in terms of traffic functionality and safety, like the flower roundabouts (in which right-turn manoeuvres do not conflict with the circulating flow). The main objective of this paper is to propose a model for the estimation the capacity, delay, levels of service and the pollutant emissions into flower roundabouts. A comparative analysis between conven…
Methodological frontier in operational analysis for roundabouts: a review
2016
Several studies and researches have shown that modern roundabouts are safe and effective as engineering countermeasures for traffic calming, and they are now widely used worldwide. The increasing use of roundabouts and, more recently, turbo and flower roundabouts, has induced a great variety of experiences in the field of intersection design, traffic safety, and capacity modeling. As for unsignalized intersections, which represent the starting point to extend knowledge about the operational analysis to roundabouts, the general situation in capacity estimation is still characterized by the discussion between gap acceptance models and empirical regression models. However, capacity modeling mu…
Multicriteria evaluation of carbon-neutral heat-only production technologies for district heating
2018
Climate change mitigation requires reducing dependence on fossil fuels and transition to low carbon energy production technologies. Nearly half of the global final energy consumption is thermal energy produced from technologies with high carbon dioxide emission. As such, it is imperative to employ carbon-neutral heat production to achieve a sustainable energy system. This paper presents a real-life case of applying multicriteria decision analysis for evaluating carbon-neutral heat-only production technologies in a major district heating system in Finland. A group of 10 experts from the energy company contributed in defining the alternative technologies and multiple economic, technological, …
Environmental, functional and economic criteria for comparing “target roundabouts” with one- or two-level roundabout intersections
2015
The article describes a criterion based on functional, environmental and economic aspects for comparing conventional roundabouts with innovative one- or two-level roundabouts. We compared the performances of eight roundabout types, differing in geometric layout, number of lanes and traffic flow regulation from each other, with regard to vehicle delays and CO2, NOx, PM2.5 and PM10 pollutant emissions. Recently-designed roundabouts - target roundabouts and flyover roundabouts - have also been studied for their undoubted practical interest. By means of closed-form capacity models and CORINAIR methodology, several traffic simulations were carried out to examine a typical annual traffic demand c…