1,720,959 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
Subclinical synovitis in primary Sjogren's syndrome: an ultrasonographic study
No full textObjectives. To evaluate, by musculoskeletal ultrasound (MSUS), articular involvement in primary SS (pSS) patients by analysing hand and wrist changes, and to correlate them with clinical evaluation and laboratory tests. Methods. Thirty-two pSS patients underwent clinical and laboratory examinations, including the SS Disease Damage Index (SSDDI) and the SS Disease Activity Index (SSDAI). MSUS was performed in all patients in both hands and wrists, evaluating the presence of inflammation within joints and periarticular tissues, and the existence of permanent joint damage. For synovial hypertrophy, joint effusion and Doppler signal findings, a semi-quantitative score (0-3) was used indicating the degree of involvement (0 = normal; 1 = mild change; 2 = moderate change; and 3 = severe change). For tenosynovitis and bone erosions, a dichotomous score (0 = absent and 1 = present) was applied. Results. Sonographic signs of synovitis of the radio-ulno-carpal joint were found in 17 (26.5%) out of 64 wrists. Wrist synovitis was found in 12 (37.5%) out of 32 patients. Ultrasonographic examination of the hand did not show significant changes. A statistically significant correlation was found between SSDDI score and the degree of sonographic signs of synovial proliferation in the wrist (P = 0.04). The correlation between the incidence of clinical involvement and the presence of pathological ultrasonographic findings was not significant. Patients with synovitis had a higher median age and higher median SSDDI (P = 0.004). Conclusions. In pSS patients, MSUS may be considered a useful tool for detecting synovitis since articular involvement can often be silent but correlated with SSDDI
Ultrasonographic assessment of the response to Etanercept treatment in patients with rheumatoid arthritis
No full textObjectives:To evaluate, using musculoskeletal ultrasound (MSUS), the effects of Etanercept therapy in patients with
rheumatoid arthritis (RA) over 3 months of treatment.
Methods:Eighteen consecutive patients, 3 male and 15 female, affected by RA (ACR criteria) who were non-responders or partial responders to DMARDs therapy were commenced on Etanercept treatment. MSUS was performed bilaterally in the 2
nd
and 5
th
metacarpophalangeal, 3rd
interphalangeal, wrist and knee joints, using a Philips/HP Image
Point HX machine with a 7,5 MHz linear probe for knee joints and a 14 MHz probe for the hands and wrists. In addition, power Doppler was used with the following settings: PRF 700-1000Hz, gain 60-65 dB, low filter. For all the
changes a semi-quantitative score (0-3) was used to indicate the presence of a localised inflammatory process (synovitis, tenosynovitis). An overall score was then calculated based on the sum of the single scores in order to obtain a
comprehensive score indicative of the global pathological change.
Results:The overall score significantly (p<10
-5
)reduced between T0 (8,5) and T3 (5). Even the most part of the local
joint scores significantly reduced.
Conclusions:apositive response to treatment with Etanercept was demonstrated by MSUS examination of several joints.
The results of our study are supportive of those presented in other reports where MSUS was used to monitor disease
activity. We were able however to demonstrate this in a wider range of anatomical targets than in previous studies.
MSUS is a useful tool in the monitoring of biologic therapy in RA
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
EFFICACIA E SAFETY DEL TRATTAMENTO CON RITUXIMAB IN UNA COORTE DI PAZIENTI AFFETTI DA ARTRITE REUMATOIDE: STUDIO OSSERVAZIONALE PROSPETTICO A 3 ANNI DI FOLLOW-UP.
No full textAppropriate 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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