1,721,072 research outputs found
Quantification of Microplastics contribution by the city of Rome to Tiber River water column and their interception by Alborella (Alburnus arborella)
No full textRivers act as conveyor belts to the sea by carrying and concentrating microplastics (MP) from urban, and extra-urbane areas. Nevertheless, there is still scarce information regarding quantity, quality, and temporal
variation of the urban contribution to riverine MP transport. Furthermore, the MP interception by riverine biota, especially by different fish species with different feeding strategies, is largely unknown. In this framework, the aim of this study was to investigate the MP concentration both in the water column of the Tiber River and into the tissues of the inhabiting A. Arborella. In order to state the urban contribution from the City of Rome (Central Italy), we compared two different areas, first one located upstream the urban stretch and second one located downstream. The correlation in terms of n. of MP fibres, spheres, and fragments was assessed both in water-column and riverine fish tissues (brain, liver, kidney, gonads, filet, and gastrointestinal tract)
Contratto di apprendistato e pubbliche amministrazioni: una sperimentazione che non decolla
Full text linkRisale alla legge Treu del 1997 il tentativo di estendere l’apprendistato a tutti i settori della economia incluso dunque il settore pubblico. Questo tentativo è stato poi replicato prima con la legge Biagi e poi con successivi e più mirati interventi legislativi: dal Testo unico dell’apprendistato del 2011 al Jobs Act del 2015. Nonostante ciò, l’apprendistato non ha mai trovato applicazione nel lavoro pubblico restando in attesa dei necessari provvedimenti attuativi. Ciò diversamente da Paesi come la Francia dove l’apprendistato è una realtà an-che nell’ambito del settore pubblico.
È in tempi recenti che il Legislatore è tornato a interessarsi della estensione dell’apprendi-stato al settore pubblico nella prospettiva di svecchiare e velocizzare il processo di innova-zione e di digitalizzazione della PA.
Le sperimentazioni in atto (2021 e 2023) non hanno tuttavia raggiunto i risultati sperati e hanno riguardato un numero davvero irrisorio di giovani, pari a meno di 100 posizioni con-trattuali.
Lo stesso impianto giuridico utilizzato in que-ste sperimentazioni non rispecchia l’essenza dell’apprendistato operando in deroga al re-gime ordinario rispetto a una normativa che, di fatto, ancora deve essere recepita nel settore pubblico e nei contratti collettivi di compart
Bioreattore per la simulazione studio di stimoli imposti a cellule e tessuti
No full textbioreattore per la simulazione studio di stimoli imposti a cellule e tessut
Searching for dark matter axions with Berry phase
No full textWe discuss novel aspects of the interaction of axions-like particles (ALP) with superfluids, superconductors in particular, and determine an induced Berry phase that is topologically singular and contributes to the generation of string-like structures. The latter are similar to vortices in superfluids. We suggest that measuring the currents generated by the Berry phase of ALP axions would enable the study of low mass regions of the ALP spectrum otherwise unobservable
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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