1,721,017 research outputs found
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
Barca
No full textL'articolo esamina l'immagine della barca nella letteratura italiana, dalla tradizione duecentesca a quella del Novecento, al fine di reperire una fenomenologia stilistica e percettiva della sua rappresentazione nei diversi autor
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
Concorso Premio Schindler 1997 “Risalire la Città- Napoli e i suoi musei: dall’Archeologico a Capodimonte
No full textPhylogenetic analysis of the hemagglutinin (HA) gene of A(H3N2) influenza viruses circulating in Northern Italy during the 2016-2017 influenza season
No full textBackground
A(H3N2) influenza virus predominated in Europe during the 2016-2017 season, characterised by an excess mortality in people >65 years concurrent with A(H3N2) circulation. A molecular and evolutionary characterisation of A(H3N2) detected in Lombardy (Northern Italy) within the Italian Influenza Surveillance Network (InfluNet) during 2016-2017 season was performed.
Methods
549 respiratory samples from ILI outpatients (525/549=95.6%) and SARI/ARDS inpatients (24/549=4.4%) were collected in Lombardy from week 46-2016 to week 17-2017. Influenza viruses were typed (A/B) and subtyped (H1pdm09/H3N2) by real-time RT-PCR. A(H3N2) HA complete gene (nt. 1-1778) was phylogenetically analysed.
Results
Influenza viruses were detected in 52.3% (287/549) specimens; 93.4% (268/287) were A(H3N2). 34% (91/268) was sequenced. All HA sequences clustered in the genetic group 3C, sub-group 3C.2a, which included the vaccine strain A/HongKong/4801/2014 (similarity: 98.3-99.4%). Most (78/91=85.7%) sequences were A/Bolzano/7/2016-like (similarity: 98.7-99.9%) and belonged to sub-clade 3C.2a1, characterised by amino acid (aa) substitutions N171K (in epitope D), I406V and G484E. 41% of these sequences had mutation T135 (loss of a glycosylation site). Two additional sub-clades were identified: 3C.2a2 (7/91=7.7%) and 3C.2a3 (4/91=4.4%), characterised by aa changes N121K/S144K (epitope A/D) and T131K/R142K (epitope A), respectively. 57 mutations in 54 aa positions were identified, many at single sequence level. Most (>80%) aa changes were detected in HA1 subunit and >50% occurred in epitope A or D. No signature substitutions were observed in HA sequences of A(H3N2) strains detected in SARI/ARDS cases or vaccinated individuals.
Conclusion
The majority of A(H3N2) viruses circulating in 2016-2017 season clustered in sub-clade 3C.2a1, molecularly and antigenically similar to A/HongKong/4801/2014 vaccine strain. Several HA variants were identified. Full-length sequencing will be useful to define the molecular and evolutionary characteristics of these A(H3N2) viruses
Italian influenza surveillance network: results of the first year of activity. The Collaborative Group for influenza surveillance
No full text- …
