Search results for "Valori"
showing 10 items of 365 documents
Les compétences de base comme déterminants de la rémunération individuelle
2011
Dans la théorie du capital humain, les individus sont rémunérés selon leur productivité, productivité qui dépend elle-même du niveau de diplôme ou du nombre d'années d'études. Mais à l'heure où l'éducation certifiée est discutée comme signal, qu'en est-il de la valorisation des compétences, notamment de base, en tant que " nouveau signal " ? Ce présent travail cherche alors à déterminer dans quelle mesure les salaires sont expliqués par le niveau de littératie, de numératie et de compréhension orale.
Per un uso sostenibile e duraturo del territorio
2014
Valorizzazione del patrimonio culturale materiale e immateriale, uso integrato, duraturo e sostenibile del territorio, partecipazione della comunità locale ai processi decisionali e gestionali del territorio, sono gli elementi che concorrono a definire e caratterizzare il progetto ecomuseale. The free museum in perenne trasformazione, che non è delimitato da mura e si espande al territorio e diventa ovunque prendendo la forma e la dimensione del paesaggio. Il prefisso eco non indica un museo naturalistico a impronta ecologica con aspetti prevalentemente rappresentativi e statici, ma piuttosto, un insieme di fattori tra natura, paesaggio, paesaggio artificiale prodotto dalla relazione simbio…
Parcours scolaires, accès aux études supérieures et mobilité sociale : comparaison entre la France, la Suisse et le Canada
2016
Le présent article examine dans quelle mesure l’organisation des trajectoires scolaires et les parcours conduisant à l'enseignement supérieur favorisent la mobilité sociale ou au contraire la reproduction des inégalités. Nous avons comparé trois pays : la France, la Suisse et le Canada. Les résultats obtenus à partir des données tirées des panels d’enquêtes menées dans ces trois pays permettent d’observer deux situations inversées. Plus l’enseignement supérieur est valorisé au détriment de la formation professionnelle, plus les inégalités ont tendance à s’exacerber. La compétition y est telle que ce sont les jeunes de milieu favorisé qui tirent davantage profit de son expansion. Par contre,…
Accrochage scolaire et alliances éducatives : vers une intégration des approches scolaires et communautaires
2012
À partir d’une revue des facteurs de risque du décrochage scolaire et en vue d’illustrer le caractère multidimensionnel de la problématique, le présent texte montre l’importance des facteurs scolaires et en particulier la prégnance des effets de l’étiquetage et du climat scolaire sur le phénomène du décrochage. Si l’école peut générer de l’exclusion, elle peut aussi, dans certains cas, cultiver des facteurs de protection, par exemple par des relations de soutien, d’empathie et d’accompagnement individualisé, qui peuvent faciliter l’accrochage scolaire de jeunes à risque. Dans ce contexte, nous illustrons l’approche scolaire du traitement du décrochage en décrivant des structures qui permett…
Acid and alkaline production from multi-ionic brines via Electrodialysis with Bipolar Membranes
2022
In recent years, a great attention has grown towards the brine valorization through chemicals production and mineral recovery as an alternative to conventional disposal. Electrodialysis with Bipolar Membranes (EDBM) is an emerging process that can be used for the production of alkaline and acidic solutions from salt solutions. Within the SEArcularMINE project framework, the exploitation of saltworks bitterns (highly concentrated solutions generated during the sea-salt production process) is proposed for minerals recovery and NaOH and HCl solutions production. In this work, an EDBM unit, equipped with commercial ion exchange membranes, was tested for the first time in closed-loop mode with: …
Green Extraction Strategies for Sea Urchin Waste Valorization
2021
Commonly known as “purple sea urchin,” Paracentrotus lividus occurs in the Mediterranean Sea and the eastern Atlantic Ocean. This species is a highly appreciated food resource and Italy is the main consumer among the European countries. Gonads are the edible part of the animal but they represent only a small fraction (10–30%) of the entire sea urchin mass, therefore, the majority ends up as waste. Recently, an innovative methodology was successfully developed to obtain high-value collagen from sea urchin by-products to be used for tissue engineering. However, tissues used for the collagen extraction are still a small portion of the sea urchin waste (<20%) and the remaining part, main…
Long-term properties and end-of-life of polymers from renewable resources
2017
[EN] The long-term properties and end-of-life of polymers are not antagonist issues. They actually are inherently linked by the duality between durability and degradation. The control of the service-todisposal pathway at useful performance, along with low-impact disposal represents an added-value. Therefore, the routes of design, production, and discarding of bio-based polymers must be carefully strategized. In this sense, the combination of proper valorisation techniques, i.e. material, energetic and/ or biological at the most appropriate stage should be targeted. Thus, the consideration of the end-of-life of a material for a specific application, instead of the end-of-life of a material s…
Suitability of blends from virgin and reprocessed polylactide: performance and energy valorization kinetics
2018
[EN] A blending strategy of virgin and reprocessed polylactide may be postulated as an alternative to reduce the material cost at industrial level, and as a valorisation route to plastic waste management of production scraps. The performance of blends prepared from virgin polylactide and polylactide mechanically reprocessed up to two cycles (PLA-V/R) was assessed in terms of thermo-oxidative stability, morphology, viscoelasticity and thermal kinetics for energetic valorisation. PLA-V/R blends showed appropriate thermo-oxidative stability. The amorphous nature of polylactide was preserved after blending. The viscoelastic properties showed an increment of the mechanical blend effectiveness, w…
Application of Pulsed Electric Field Treatment for Food Waste Recovery Operations
2016
International audience; Food industry is generating annually huge quantities of by-products and waste, which are generally considered as problem, as their disposal is associated with environmental and health related issues. During the last decade, numerous research groups and industries have been interested in valorizing these by-products by extracting valuable compounds and incorporating them generally in food and/or cosmetic products, which enhances the profitability of the process. Conventional extraction methods (i.e., maceration, thermal extraction) are exten- sively used for such purposes and showed high yields in many cases. However, the need to replace toxic organic solvents, shorte…
L'allevamento bovino nella Vale del Torto: un caso di zootecnia sostenibile in Sicilia
2011
La zootecnia pur non risultando tra le principali attività del settore agricolo siciliano, riveste un ruolo di estrema importanza sociale, ancor più che economica, per ampie zone della Sicilia. La crisi che dagli inizi degli anni 2000 investe il settore, ed in particolare quello bovino, ha provocato tanto la chiusura di un elevato numero di allevamenti che una forte contrazione dei capi allevati, siano essi ad indirizzo carne che ad indirizzo latte. La zootecnia bovina ad indirizzo carne presente nella Valle del Torto, in provincia di Palermo e zona oggetto del presente studio, ha per molti decenni decisamente contribuito allo sviluppo di una comunità rurale che su questa attività ha creato…