1,721,164 research outputs found
Increasing sustainability of growing media constituents and stand-alone substrates in soilless culture systems
Full text linkPeat-free growing media constituents and stand-alone substrates are the basis for the economic and ecological efficiency of the soilless culture system. Nevertheless, divergence between the model and practice still exists, coming from large gaps in the knowledge of alternative organic materials and of their effects on crop performance. A more detailed understanding of these topics is necessary to increase the soilless culture management capacity. In this respect, this critical review collects research outcomes concerning the sustainability of soilless culture and growing media constituents and their impact on the environment. In particular, the review covers designated articles stressing the pros and cons of soilless culture and growing media constituents, the exploitation of different organic materials and their economic and environmental relevance
Une traduction toscane de l’Histoire ancienne jusqu’à César ou Histoires pour Roger. La fondation de Rome, la Perse et Alexandre le Grand
No full textL’Histoire ancienne jusqu’à César, première histoire universelle écrite en prose française au début du XIIIe siècle, a joui d’une grande fortune en Italie, comme le montrent les manuscrits copiés dans les ateliers transalpins, les traductions, les citations et les réemplois jusqu’à la première moitié du XIVe siècle.
Les traductions italiennes, ou volgarizzamenti, se divisent en deux groupes : les versions toscanes et les vénitiennes. Parmi les traductions toscanes, nous trouvons celle contenue dans trois manuscrits du Trecento, rédigée probablement entre la fin du XIIIe siècle et le début du XIVe. Le plus récent de ces codices, le manuscrit II I 146 de la Biblioteca Nazionale Centrale de Florence, est le seul témoin de l’Histoire ancienne en italien qui présente la section alexandrine ; il est utilisé comme base pour l’édition proposée ici, qui offre le récit sur Rome (depuis la fondation jusqu’aux guerres contre les Samnites), la Perse, Philippe II de Macédoine, Alexandre le Grand et les guerres des diadoques. Cette traduction toscane représente probablement l’une des plus anciennes versions italiennes de l’histoire d’Alexandre
Online privacy and market structure: Theory and evidence
No full textThis paper investigates how privacy regulation affects the structure of online markets. We empirically analyse the effects of the 2009 ePrivacy Directive in Europe on firm revenues. Our results indicate that, if any, only large firms were weakly negatively affected by the implementation of the Directive. We also provide a simple theoretical model predicting an avenue how privacy regulation may predominantly influence the revenues and profits of larger firms, even if - as some of our evidence indicates - these larger firms may actually offer more privacy than smaller rivals. Our results suggest that while privacy regulation is not without costs to businesses, it need not distort competition to the favour of larger firms
Recensione a Valerio Cappozzo, "Dizionario dei sogni nel Medioevo. Il 'Somniale Danielis' in manoscritti letterari", Firenze, Olschki, 2018
No full textIl contributo recensisce il volume di Valerio Cappozzo 'Dizionario dei sogni nel Medioevo. Il Somniale Danielis in manoscritti letterari', offrendo alcune riflessioni sui testi oniromantici in volgare e sulla loro tradizione manoscritta
Per l'edizione di Guittone d'Arezzo: «Ai, bona donna, che è devenuto» (IV)
No full textEdizione critica della canzone di Guittone d'Arezzo
Ultra-Fast Broadband Access and Productivity: Evidence from Italian Firms
Full text linkWe study the impact of ultra-fast broadband (UFB) infrastructures on the total factor productivity (TFP) and labor productivity of firms. We use unique balanced panel data for the 2013–2019 period on incorporated firms in Italy. Using the geographical location of the firms, we merge firm-level data with municipality-level information on the diffusion of UFB, which started in 2015. We derive consistent firm-level TFP estimates by adopting a version of the Ackerberg et al.’s (2015) method, which also accounts for firm fixed effects. We then assess the impact of UFB on productivity and deal with the endogeneity of UFB by exploiting the physical distance between each municipality and the closest optical packet backbone node. Our results show an overall positive impact of UFB on productivity. Services companies benefit the most from advanced broadband technologies, as do firms located in the North-West and South of Italy. We further decompose the impact of full-fiber networks from mixed copper-fiber connections and find that the former significantly contribute to enhancing firm productivity. Finally, by exploiting Labor Force Survey data, we provide suggestive evidence that productivity increases from UFB might be related to structural changes at the workforce level
Il rimaneggiamento cortese del Roman de Thèbes tràdito dal manoscritto P (Cologny, Bibliotheca Bodmeriana, 18)
No full textIl contributo studia la versione del 'Roman de Thèbes' contenuta nel codice 18 della Bibliotheca Bodmeriana di Cologny (Ginevra), evidenziando alcune particolarità dei procedimenti attuati dal rimaneggiatore e i possibili rapporti con le riscritture presenti nella versione del 'Roman de Troie' trasmessa dallo stesso manoscritto
Il Libro de la creatione del mondo (ms. Riccardiano 1311): sondaggi sulle fonti e le modalità di compilazione
No full textIl contributo indaga le fonti di una compilazione in volgare nota come 'Libro de la creatione del mondo', contenuta nel manoscritto Riccardiano 1311, costituita da sezioni di testi biblici, mitografici e storiografici di varia origine, tra cui volgarizzamenti toscani dell''Historia de preliis' e dell''Histoire ancienne jusqu'à César'
The Impact of Privacy Regulation on Web Traffic: Evidence From the GDPR
No full textWe use traffic data from around 5,000 web domains in Europe and United States to investigate the effect of the European Unions General Data Protection Regulation (GDPR) on website visits and user engagement. We document an overall traffic reduction of approximately 15% in the long-run and find a measurable reduction in engagement with websites. Traffic from both paid and unpaid channels dropped significantly. We observe an inverted U-shaped relationship between website size and change in visits due to privacy regulation: the smallest and largest websites lost visitors, while medium-sized ones were less affected. Enforcement matters as well: The effects were amplified considerably in the long-run, following the first significant fine issued eight months after the entry into force of the GDPR. Exploring potential mechanisms, both a reduction in advertising effectiveness and a higher user awareness of privacy issues can explain our results
«Or vos conterons d’autre matiere». Studi di filologia romanza offerti a Gabriella Ronchi
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