1,720,981 research outputs found
Indagini di carattere ambientale attraverso l’analisi di dati multispettrali Landsat ed ASTER
Full text linkThe paper focuses on the use of multispectral satellite data for environmental monitoring along a portion of the Emilia-romagna coastal area where natural (wetland and salt intrusions) and anthropical (agricultural exploitations) aspects interact and modify the original ecological equilibrium. The environmental properties of wet and dry areas have been investigated by classification of satellite data acquired from Landsat TM 4/5, ETM+ and Terra-ASTER platforms acquired since 1986 to 2002. Results, specific properties of transitional environments that were highlighted by the analysis and possible validation procedures are addressed
Thermal properties of ice bodies in East Antarctica: exploiting ASTER data in the Northern Victoria Land area
No full textThe paper addresses the use of TERRA-ASTER thermal infrared data for investigation of ice and bedrocks properties in the Northern Victoria Land, East Antarctica. Data acquired by the TIR (Thermal Infrared Radiometer) sub-system were processed in order to retrieve information about the ground temperature and thermal anomalies over a coastal area characterized by the presence of glaciers, ice shelves, exposed bedrock, sea-ice and the Mount Melbourne volcanic edifice. As discussed in this paper, a deeper knowledge of the ice mass exchanges dynamics could be therefore derived from the analysis of the thermal properties at the ground which have the potential to highlight features that are undetectable by the use of visible channel
Studi sul dato termico ASTER per applicazioni ambientali e territoriali
No full textStudi sul dato termico ASTER per applicazioni ambientali e territorial
SARS-CoV-2: Recent reports on antiviral therapies based on lopinavir/ritonavir, darunavir/umifenovir, hydroxychloroquine, remdesivir, favipiravir and other drugs for the treatment of the new coronavirus
Full text linkHere we report on the most recent updates on experimental drugs successfully em-ployed in the treatment of the disease caused by SARS-CoV-2 coronavirus, also referred to as COVID-19 (COronaVIrus Disease-19). In particular, several cases of recovered patients have been reported after being treated with lopinavir/ritonavir [which is widely used to treat Human Immunodeficiency Virus (HIV) infection] in combination with the anti-flu drug osel-tamivir. In addition, remdesivir, which has been previously administered to Ebola virus pa-tients, has also proven effective in the U.S. against coronavirus, while antimalarial chloro-quine and hydroxychloroquine, favipiravir and co-administered darunavir and umifenovir (in patient therapies) were also recently recorded as having anti-SARS-CoV-2 effects. Since the recoveries/deaths ratio in the last weeks significantly increased, especially in China, it is clear that the experimental antiviral therapy, together with the availability of intensive care unit beds in hospitals and rigorous government control measures, all play an important role in dealing with this virus. This also stresses the urgent need for the scientific community to de-vote its efforts to the development of other more specific antiviral strategies
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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