1,721,012 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Reliability and validity of the Italian version of the Ucla-scleroderma clinical trial consortium--gastrointestinal tract instrument in patients with systemic sclerosis
No full textBackground: Gastrointestinal tract (GIT) involvement is frequent (up to 90%) in patients with systemic sclerosis (SSc). The UCLA Scleroderma Clinical Trial Consortium GIT (UCLA-SCTC GIT) 2.0 is a validated instrument for measuring the presence, severity and impact of GI symptoms on the health-related quality of life (HRQOL).
Objectives: To test the acceptability, feasibility, reliability and validity of the Italian translated version of UCLA-SCTC GIT 2.0.
Methods: Translation was performed using the concept elaboration, two forward translations with reconciliation followed by two back translations with review. This was then reviewed by the developer (DK) and pilot tested in 5 patients, the transcript was reviewed and any inconsistencies reconciled. Acceptability and feasibility of the questionnaire were evaluated based on the comments of the patients. Internal consistency was evaluated by Cronbach's alpha. External consistency was measured by comparing with the SF-36 and EQ-5D by Spearman's rho rank correlation coefficient. We considered coefficients ≥0.30 as meaningful.
Results: 20 consecutive SSc patients (mean age 57,9) were recruited, 90% were female. Four patients had a diffuse cutaneous (dc)-SSc, 11 limited cutaneous (lc)-SSc and 5 had very early (ve)-Ssc based on EUSTAR classification [3]. 26,3% had isolated anti-nuclear antibody positivity, 31,6% had anti-centromere positivity and 42,1% had anti-topoisomerase positivity. Mean disease duration since the first non-Raynaud symptom was 12,6 years. The UCLA-SCTC GIT was well accepted by the patients and no additional comments were noted regarding the content of the instrument. Percentage of missing data in UCLA-SCTC GIT score was 3,4% vs. 16% for SF-36 which has a similar number of total items. Internal consistency was good (alpha>0,70) in all domains except for the Distention/Bloating domain (alpha=0,53). Mean total UCLA-SCTC GIT score was 0,37 (range 0-2,83) and the worse scores were observed for Reflux (0,40, range 0-3), Distention/bloating (0,86, range 0-3) and for Constipation (0,53, range 0-2,5). GIT total score, Diarrhea and Fecal soilage domains significantly correlated with disease duration (p<0,03; p<0,05 and p<0,05 respectively). UCLA-SCTC GIT Emotional Well-being was strongly correlated with the mental component summary of SF-36 (p<0,03) and with the EQ-5D Self-care domain (p<0,05). Reflux and Diarrhea domains correlated with the EQ-5D Usual Activities (p<0,02 and p<0,05) and Self-care domains (p<0,01 for both), thus reflecting the impact on everyday and self-care activities.
Conclusions: This is the first validation study of the Italian version of UCLA-SCTC GIT 2.0. Our data support its feasibility, reliability, and validity, in Italian SSc patients
Second malignancies in breast cancer patients following radiotherapy: a study in Florence, Italy
Get PDFntroduction: Patients diagnosed with breast cancer are often treated with surgery followed by radiation therapy. In this paper, we evaluate the effect that radiotherapy may have had on the subsequent risk of second malignancies, including the possible influences of age at treatment and menopausal status.Methods: In order to evaluate the long-term consequences of radiotherapy, a cohort study was conducted based on clinical records for 5,248 women treated for breast cancer in Florence (Italy), with continuous follow-up from 1965 to 1994. The Cox proportional hazards model for ungrouped survival data was used to estimate the relative risk for second cancer after radiotherapy.Results: This study indicated an increased relative risk of all second cancers combined following radiotherapy (1.22, 95% CI: 0.88 to 1.69). The increased relative risk appeared five or more years after radiotherapy and appeared to be highest amongst women treated after the menopause (1.61, 95% CI: 1.13 to 2.29). Increased relative risks were observed specifically for leukaemia (8.13, 95% CI: 0.96 to 69.1) and other solid cancers (1.84, 95% CI: 1.06 to 3.16), excluding contralateral breast cancer. For contralateral breast cancer, no raised relative risk was observed during the period more than five years after radiotherapy.Conclusions: The study indicated a raised risk of second malignancies associated with radiotherapy for breast cancer, particularly for women treated after the menopause
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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