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showing 10 items of 3331 documents
Modelli di collaborazione fra imprese e dotazioni di capitale sociale
2014
Dopo aver esposto le principali linee di ricerca sul capitale sociale, ci si sofferma ad analizzare i principali risultati di una ricerca originale sulle imprese, dedicando particolare attenzione al ruolo dei costi di transazione e alla relazione fra cooperazione e performance economica
Introduzione
2015
Si presentano i principali risultati della ricerca dedicata alla ricostruzione dei divari territoriali nella costruzione delle competenze scolastiche
Complexes of chitosan with low and high molecular weight carboxylic ligands in aqueous solution.
2008
Lavoro Domestico
2015
Il lavoro domestico presenta numerose peculiarità che ne rendono complesso l’inquadramento dal punto di vista della salute e della sicurezza dei lavoratori. In primo luogo il soggetto casalingo trascorre molto tempo all’interno delle mura domestiche, con tempi di esposizione alle diverse noxae lesive lunghi e difficilmente quantificabili; in secondo luogo è estremamente difficile promuovere in modo capillare le attività tipicamente svolte negli altri ambiti lavorativi, quali l’attuazione delle misure di prevenzione e protezione del lavoratore, la valutazione dei rischi, l’informazione e la formazione o la sorveglianza sanitaria. I vari fattori di rischio, sia per la sicurezza sia per la sal…
Polysaccharide nanocrystals as fillers for PLA based nanocomposites
2016
The development of green nanocomposites based on biopolymers and bio-based nanofillers has attracted over the recent years the attention of academic and industrial research. Indeed, these nanocomposites could replace some oil-derived polymers and thus helping to overcome environmental problems. In this regard, PLA as matrix and polysaccharide nanocrystals as fillers are the most promising components to obtain high-performance green bio-nanocomposites suitable for different applications, particularly for packaging and biomedical applications. Indeed, at present, due to its processability, mechanical and biological properties, as well as its commercial availability, poly(lactic acid) (PLA) po…
Effect of Sheep Wool Fibers on Thermal Insulation and Mechanical Properties of Cement-Based Composites
2019
The use of sheep wool as a filler of cement in order to produce mortar or plaster involves several advantages for environment and energy. Moreover, it is considered as a waste and, therefore, its use is characterized by low cost. The aim of this paper is to evaluate the influence of wool fibers on thermal conductivity and mechanical properties of cement. The samples were prepared using wool fibers, obtained from a breed of Sicilian sheep, with three different lengths (i.e., 1, 6, and 20 mm). Furthermore, in order to evaluate the influence of fiber content, the samples were prepared by varying the fiber weight fraction. The thermal conductivity of the samples was analyzed by using a heat flo…
Valorisation of industrial iron oxide waste to produce magnetic barium hexaferrite
2016
Barium M-type hexagonal ferrite (BaM, BaFe12O19) is an immensely important magnetic material, which we have successfully made from the simple valorisation of Fe-rich industrial waste from steel wire drawing, with addition of BaCO3 and heating in air to 1000 degrees C. The optimum ratio of Fe. Ba (producing 86 wt% BaM) was found to be 11: 1 (non-stoichiometric), and secondary phases of alpha-Fe2O3 (non-magnetic) and ZnFe2O4 (poorly antiferromagnetic) were always present. This material consisted of small submicron platelets. A hard magnetic ferrite was produced with Ms=48.6 A m(2) kg(-1) and H-c=211.5 kA m(-1). The highest density was achieved by sintering samples with Fe: Ba ratios of 11: 1 …
Macchina del fango e demonizzazione dell’avversario. Sulla nozione di diabole nella retorica greca.
2014
The topic of this paper is the rhetorical notion of diabole: a charge that attempts to cast the opponent in a negative light in order to create a negative prejudice in the audience. It is a rhetorical strategy similar to what is currently called a “character assassination” (in Italian “macchina del fango”), a strategy aimed at discrediting and vilifying the adversary using any means. Therefore, it is a phenomenon that involves the important question concerning the role of ethos in the persuasive process. The paper focuses on a particularly insidious aspect of diabole: its use as a form of counterattack. This means that diabole can be dangerous not only when it is used to discredit or vilify…
Caratterizzazione delle vernici da antichi strumenti musicali.
2011
Conversazioni umane e artificiali
2023
C’è una caratteristica centrale che distingue ChatGPT e simili da un interlocutore umano: pur sapendo rispondere in modo coerente e creativo a richieste anche complesse, sono del tutto incapaci di proporre contenuti conversazionali non puramente reattivi, manca, all’AI, la parte “affiliativa” della conversazione