1,720,979 research outputs found
Anziani e politica sociale: innovazioni organizzative e processi sociali di apprendimento
No full textKryptosafe: managing and trading data sets using blockchain and IPFS
Full text linkTrading data sets is not easy. The owner of valuable data, once they are sold the first time, cannot be sure that they will not be copied and resold. On the other hand, the buyer, cannot be sure that the seller will not sell the same data to a competitor. The advent of blockchain technology, or DLT, can mitigate, or event solve these issues, because it can certify the data ownership, and act as a broker between seller and buyer. In this paper we present Kryptosafe, a system developed following sound software engineering practices, aimed to manage the trade of data sets taking advantage of the unique features of immutability and trustfulness of Ethereum blockchain, and of IPFS distributed DBMS. Kryptosafe allows data sellers to sell a whole encrypted data set or to show potential buyers a subset of it, allowing full access only after the sale is finalized. Using ERC721 and ERC1155 tokens, it also manages one-time sales, when the data set ownership is simply transferred to the buyer, or multiple sales of the same data set to different buyers
Edilizia e clima: alcune proposte di integrazione alla normativa urbanistica
No full textIl saggio esamina alcune norme urbanistiche in riferimento al Climate Change e al contenimento dei consumi energeticiThe article reviews some experiences of urban regulations regarding energy consumption and Climate Chang
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Reorganization of actin cytoskeleton in L929 cells infected with Coxiella burnetii strains isolated from placenta and foetal brain of sheep (Sardinia, Italy)
No full textCoxiella burnetii, the etiological agent of Q Fever, is a zoonotic pathogen distributed worldwide. It has been reported that virulent strains of C. burnetii are poorly internalized by monocytes compared to avirulent variants. Virulence is also associated to the formation of pseudopodal extensions and transient reorganization of filamentous actin. In this article, we investigated the ability of 2 Coxiella strains isolated from ovine aborted samples to induce reorganization of the actin cytoskeleton in mouse fibroblast cells. Cells were exposed for 24 and 48 hours to ovine placenta and foetal brain tissue homogenates and then analysed by polymerase chain reaction (PCR) in order to detect Coxiella infection. The formation of pseudopodal extensions, the polarized distribution of F-actin, and the involvement of C. burnetii strain in cytoskeleton reorganization have been assessed using a laser scanning confocal fluorescence microscope. Results indicate that similarly to the virulent reference strain, strains of C. burnetii isolated from foetal brain induced morphological changes – modification in F-actin distribution and in the localization of bacteria. By contrast, C. burnetii strain isolated from ovine placenta did not induce any significant change in L929 cell morphology. In conclusion, both C. burnetii strains isolated from ovine placenta and foetal brain were pathogenic causing ovine abortion, but in vitro the C. burnetii strain isolated from brain only was able to induce F-actin reorganization in L929 infected cells
Start-up of a Granular sludge Sequencing Batch Reactor for the treatment of 2,4-dichlorophenol contaminated wastewater
No full textChlorophenols are characterized by high toxicity even at relatively low concentrations,
strong tendency to bioaccumulate and persistency in water and soil. In this study, a
Granular sludge Sequencing Batch Reactor (GSBR) was started-up for the biological
aerobic treatment of wastewater containing 2,4-dichlorophenol (2,4-DCP), in presence
of readily biodegradable sodium acetate (NaAc) as the biogenic substrate. Different
influent concentrations of NaAc (420-800 mg/L) and 2,4-DCP (0-20 mg/L), as well as
different operating conditions (i.e. cycle length) were tested in order to determine the
optimal strategy for successful GSBR start-up: stable granulation and complete 2,4-
DCP removal with stoichiometric chloride release (indicating the complete
dechlorination of the toxic compound) were achieved only when high NaAc influent
concentration and volumetric organic loading rates (800 mg/L and 1.9 kgCOD/m3∙d,
respectively), prolonged reaction phase (cycle time of 4 hours) and gradual increase of
2,4-DCP concentration in the influent up to 20 mg/L were applied, thus providing useful
information for process optimization in view of future scale-up. Granules were initially
colonised by fungi which disappeared throughout the experimental activity, and
complete 2,4-DCP removal was mostly due to bacterial activity
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