170,091 research outputs found

    Erratum: Acute exacerbation of interstitial lung diseases secondary to systemic rheumatic diseases: A prospective study and review of the literature (Journal of Thoracic Disease (2019) 11 (1621-1628) DOI: 10.21037/jtd.2019.03.28)

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    In the article that appeared on Page 1621-1628, Vol 11, No 4 (April 2019) Issue of the Journal of Thoracic Disease (1), the given and family names of author “Fabrizio Pancaldi” was incorrectly published in the original. The author's name should be corrected as Fabrizio Pancaldi, instead of Pancaldi Fabrizio. The authors regret the error

    Nell’abbraccio dei recinti. Scavi e configurazione dei margini dell’area archeologica centrale di Roma fra Ottocento e primo Novecento

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    La lettura delle principali fasi degli scavi condotti nell’area archeologica centrale di Roma fra Ottocento e primo Novecento permette, contestualmente, di risalire alle vicende costruttive dei recinti, strutture al margine fra la città antica e quella moderna. In questo periodo, le prime staccionate in legno sistemate sulle scarpate irregolari verso il Foro Romano, vengono sostituite da parapetti e cancellate in ferro posti a completamento dei muri di sostegno delle strade contermini ai bacini di scavo. Il loro uso, le tipologie e i materiali scelti testimoniano il modificarsi delle esigenze conservative e di sicurezza con l’ampliarsi degli scavi e l’abbassarsi dei livelli. Superato, ad esempio, il problema del passaggio veicolare nel Foro Romano, alla fine dell’Ottocento si dovettero risolvere le questioni della possibile caduta dall’alto nei bacini di scavo, dell’uso di quest’ultimi come discariche a cielo aperto, del controllo e protezione delle persone e dei monumenti, soprattutto, nelle ore notturne. Aspetti che, uniti all’aumento dei fruitori, suggerirono di sistemare nuove recinzioni fisse, di modificare la generale accessibilità e visibilità dell’area, di introdurre l’ingresso a pagamento. La conoscenza dei presupposti ideologici che orientarono tali scelte, al margine della città contemporanea, vuole infine contribuire a fornire ulteriori strumenti al tema, ancora largamente dibattuto, delle ruolo dell’area archeologica centrale monumentale di Roma nella città contemporanea

    Per una storia sociale degli esperti

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    Alcune proposte storiografiche, centrate sull'idea di una storia sociale degli esperti. Le proposte prendono spunto dagli studi condotti dall'autore sull'intreccio fra storia della fisica e storia della telegrafia nell'opera di William Thomson (Lord Kelvin)

    The economic crisis as a trigger of convergence? : short-time work in Italy, Germany and Austria

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    In all European countries, emergency policy measures have been introduced in order to counteract the employment consequences of the economic crisis. In the context of variously composed anti-crisis packages, many European countries have used Short-Time Work (STW) schemes, that is measures to subsidize a temporary reduction in working time intended to maintain an employment relationship. This article focuses on the issue of whether the economic crisis has spurred any convergence in the use of STW in three social-insurance countries – Austria, Germany and Italy – or whether policy change has rather occurred in a path-dependent fashion. In order to do so, the article also adopts a systemic approach, focusing on relationships of complementarity or functional substitution and equivalence among the various schemes comprising income maintenance systems to tackle the risks of partial or total unemployment

    Gli schemi di protezione sociale in tempi difficili : convergenza o persistente divergenza? Un'analisi comparata dello Short Time Work in Austria, Germania e Italia

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    In all European countries, emergency policy measures have been introduced in order to counteract the employment consequences of the economic crisis. In the context of variously composed anti-crisis packages, many European countries have used Short- Time Work (STW) schemes, that is measures to subsidize a temporary reduction in working time intended to maintain an employment relationship. This article focuses on the issue whether the economic crisis has spurred any convergence in the use of STW in three social-insurance countries – Austria, Germany and Italy – or whether policy change has rather occurred in a path-dependent fashion. In order to do so, the paper also adopts a systemic approach, focusing on relationships of complementarity or functional substitution and equivalence among the various schemes comprising income maintenance systems to tackle the risks of partial or total unemploymen

    Biodiesel production from Neochloris oleoabundans by supercritical technology

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    Oleaginous microalgae have been proposed as a sustainable alternative biomass to produce biodiesel in order to substitute conventional vegetable oils derived from oilseed crops. Particularly, recent studies pointed out the potential of N. oleoabundans, cultured in seawater or in anaerobically digested dairy manure, to produce triglycerides with high content of monounsaturated fatty acids. The supercritical technology has been recognized as a green sustainable alternative to transform biomass into valuable products. Thus, the aim of the present work was to study the direct supercritical alcohol processing of partially dried N. oleoabundans biomass and later reaction products fractionation by supercritical CO2 or liquid n-hexane. A direct alcoholysis of microalgae biomass was carried out at different temperatures (250 °C and 280 °C) and increasing reaction times in order to evaluate the fatty acid ester production. Bio-oils from microalgae with up to 35 wt.% fatty acid esters were obtained by two fold extraction with n-hexane. Conversely, supercritical CO2 fractionation produced upgraded bio-oils with up to 74 wt.% of fatty acid esters content
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