Search results for "aria"
showing 10 items of 17848 documents
INCIDENZA SULL’ANALISI DI RISCHIO DELLE MODALITÁ DI MISURA DEI SOIL GAS: IL CASO DI UN S.I.N. SICILIANO
2020
Il monitoraggio delle matrici aeriformi sta assumendo importanza crescente nell’ambito dei procedimenti di bonifica di siti contaminati, con riferimento sia all’esecuzione delle analisi di rischio, sia alla conseguente progettazione degli interventi di risanamento. L’utilizzo di misure dirette di campo si rivela di notevole interesse per la verifica di quelle indirette, ottenute con gli algoritmi implementati nei modelli matematici utilizzati per l’analisi di rischio. Obiettivo del lavoro presentato nella nota è stato quello di valutare l’influenza di misure dirette di soil gas e di flussi emissivi sull’analisi di rischio sanitaria. Come caso studio, si è considerato un S.I.N. nel territori…
A CO2-gas precursor to the March 2015 Villarrica volcano eruption
2017
We present here the first volcanic gas compositional time-series taken prior to a paroxysmal eruption of Villarrica volcano (Chile). Our gas plume observations were obtained using a fully autonomous Multi-component Gas Analyser System (Multi-GAS) in the 3 month-long phase of escalating volcanic activity that culminated into the 3 March 2015 paroxysm, the largest since 1985. Our results demonstrate a temporal evolution of volcanic plume composition, from low CO$_2$/SO$_2$ ratios (0.65-2.7) during November 2014-January 2015 to CO$_2$/SO$_2$ ratios up to ≈ 9 then after. The H$_2$O/CO$_2$ ratio simultaneously declined to <38 in the same temporal interval. We use results of volatile saturatio…
Retour sur une recherche européenne sur le volontariat des aînés et réflexions sur les particularismes français
2016
International audience
Il volontariato come strumento di coesione sociale: quale relazione con l'efficienza della pubblica amministrazione?
2017
Il 2011 è stato “l’Anno Europeo delle Attività di Volontariato” che ha come principale obiettivo la promozione di un dialogo più intenso e meglio strutturato tra le istituzioni e tutti gli altri soggetti coinvolti nel lavoro delle organizzazioni di volontariato1. Secondo GHK (2010) circa il 22% -23% degli europei sono coinvolti nel volontariato dedicandosi gratuitamente a diverse attività che coprono una vasta gamma di settori (‘istruzione, formazione, sport e tutela dell’ambiente). Sempre tale studio riporta una misurazione della di usione delle pratiche di volontariato in Europa distinguendo diversi gradi di intensità: molto alta (oltre il 40%) in Austria, Paesi Bassi, Svezia e Regno…
Quantification of Platinum in Edible Mushrooms Using Voltammetric Techniques
2021
Edible mushrooms are a food source with interesting nutritional values. The chief objective of this research was to develop a consistent method for the quantitative ultra-trace analysis of Pt in mushrooms, which is complex because it cannot be readily quantified by common analytical procedures. This research is one of the first analytical methods to establish Pt amount in these vegetables. In this research, 28 different edible mushroom samples from Italy were investigated. Determination of Pt in mushrooms was completed using Differential Pulse Voltammetry (DPV). In this study, we applied the standard addition method because there are no certified reference mushrooms containing platinum grou…
Cost Efficiency of Hybrid Cloud Storage : Shortening Acquisition Cycle to Mitigate Volume Variation
2015
Hybrid cloud storage infrastructure, which combines cost-effective but inflexible private resources and flexible but premium-priced public cloud storage, allows organizations to operate cost-efficiently under demand volume uncertainty. The extant literature, however, offers a limited analytical insight into the effect that the variation of demand has on the cost-efficient mix of internal and external resources. This paper considers the storage capacity acquisition cycle, i.e. the interval at which the organization re-assesses and acquires additional resources, as a parameter shaping the optimal mix of resources. It introduces a model capturing the compound effect of the acquisition cycle an…
Relationship between volume and energy of vector fields
2001
Abstract A unified study of energy and volume functionals is presented here by determining the critical points of a functional that extends simultaneously energy and volume and that is defined on the product of the manifold of smooth maps C∞(M,N) times the manifold M of riemannian metrics on M. The restriction of this functional to different submanifolds of the space of vector fields X (M)× M is also considered, and used to study several functionals generalizing volume and energy or total bending of vector fields
Política, virtud y terror en el jacobinismo
2010
La Revolución francesa de 1789 fue el escenario donde se libró una lucha abierta entre dos concepciones de la libertad y sus respectivas repercusiones en la concepción del poder político: la libertad particular que el individuo reclama para sí al margen del Estado, e incluso contra él, y la libertad del ciudadano, entendida como la libertad de obedecer a la voluntad general. El objetivo de este ensayo es perfilar, en líneas generales, la posición que adoptó el jacobinismo con respecto a la relación entre sociedad civil y Estado, en confrontación con el enfoque liberal que, siguiendo los modelos americano e inglés, propugnaron los sectores moderados de la Revolución.
Plasticity in Photoperiodism : Drosophila montana Females Have a Life-Long Ability to Switch From Reproduction to Diapause
2022
Photoperiodic reproductive diapause is an essential part of female life cycle in several insect species living on high latitudes, where overwintering in reproductive stage involves high risks for survival and progeny production. The sensitive period (SP), during which photoperiodic cues can trigger the switch from direct development to diapause, can last from a few hours or days after emergence to the entire life span of females. Moreover, in some species, sexually mature females can enter post-reproductive diapause as a response to decreasing day length and/or temperature. We studied the duration of SP for diapause induction and the females’ ability to enter post-reproductive diapause at s…
Language ideologies in the Romanian Banat : analysis of interviews and academic writings among the Hungarians and Germans
2009
This is an introduction to a compilation of six articles on language ideologies in the Romanian Banat. My dissertation was initiated by fieldwork in the area, resulting to a database of interviews among the Hungarian and German inhabitants. This data is compared to intellectual writings. With regards to researcher position, I identify myself as a traveler in the area and as a foreign scholar. The analytical framework of this study draws from the study of Language Ideologies and Conversation Analysis.Here, language ideologies are broadly defined as metalinguistic discourse or talk about language. In the analysis of interviews, conversation analysis is used, in order to analyze the emergent c…