1,720,967 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
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
Increased incidence of multiple sclerosis in the Veneto region, Italy.
No full textBackground: To what extent the progressive increase in the incidence of multiple sclerosis (MS) observed in the province of Padova over the period 1970–1999 was an expression of a real increased risk of developing MS remained unclear.
Objective: The objective of this paper is to update the epidemiological figures of MS and probe whether the risk of having MS has increased in the province of Padova during the decade 2000–2009.
Methods: All patients born in Italy and having a diagnosis of MS or possible MS identified through analysis of all available sources of information were included in the study. The incidence and prevalence rates between 2000 and 2009 were obtained and compared with our previously published data.
Results: On 31 December 2009, the overall prevalence was 139.5/100,000, 192.0±9.5 for females and 83.9±6.3 for males. During the decade 2000–2009, the overall incidence rate of MS was 5.5±0.5, 7.4±0.8 for females and 3.5±0.6 for males. The onset-diagnosis delay, the female/male ratio and the mean age at onset did not significantly change compared to the prior period of observation.
Conclusion: Our findings support the hypothesis of a real increased risk of developing MS in the province of Padova. Moreover, the actual prevalence of 1.4/1000 makes our region a high-risk geographical area for MS. The role played by exogenous factors in determining susceptibility to MS needs to be thoroughly investigated
BAFF is decreased in the cerebrospinal fluid of multiple sclerosis at clinical onset
No full textB-cells are thought to play a relevant role in multiple sclerosis (MS) pathology. BAFF (B cell activating factor of the TNF family) is a B-cell survival factor constitutively produced inside the CNS by astrocytes. We studied the intrathecal synthesis of BAFF in MS at clinical onset. Paired serum and cerebrospinal fluid (CSF) specimens from 40 clinically isolated syndromes (CIS) suggestive of MS or early relapse-onset MS (eRRMS) and from 18 healthy controls (HC) were analysed. Patients were classified based on the detection of oligoclonal IgG bands in the CSF (IgGOB+ and IgGOB-). BAFF was detected by highly sensitive ELISA and its ratio (CSF-BAFF/serum-BAFF, QBAFF) and Index (QBAFF/QAlb, BAFF-Index) were calculated. IgGOB+ presented lower CSF concentrations of BAFF compared to both HC and IgGOB- (p<0.05). BAFF Index was significantly lower in IgGOB+ compared to both HC and IgGOB- (p<0.01). A significant inverse correlation between QIgG and QBAFF (r: -0.4, p<0.05) and between BAFF index and IgGIF (r: -0.4, p<0.05) or IgG Index (r: -0.4, p=0.05) was found in IgGOB+. The decreased CSF levels of BAFF in IgGOB+ at clinical onset suggest the absorption of this factor by intrathecally recruited B cells since the early disease phases
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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