1,720,985 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
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
Electro-cautery of myomas during caesarean section – two cases reports
No full textMyomectomy is a surgical procedure not usually performed during caesarean section because associated with high risk of haemorrhage and other complications. The goal of our study is to evaluate the feasibility of myomectomy during caesarean section, the outcome, and try to establish the favourable conditions to perform a myomectomy during the same surgical event. Electro-cautery of intramural-subserous myomas was performed on two different patients. Only the myomas of little or middle size were treated. Both patients had multiple fibroids, a firm contraindication for myomectomy during caesarean section. After 10 and 13 months since myoma electro-cautery, all uterine fibroids treated were completely reabsorbed. These preliminary results regard the fibroids of middle size. It could be interesting evaluating the electro-cautery on bigger fibroid
Ultrasound diagnosis and Doppler monitoring of a pelvic spleen in pregnancy
No full textWe describe a patient with a pelvic spleen diagnosed during
pregnancy and monitored through gestation which we
believe to be the first reported case. A 40-year-old woman
was referred at 8 weeks of gestation because of a chronic
intense pain in the left iliac cavity which had spread to her
lower back. Clinical examination revealed a poorly defined
pelvic mass. Pelvic ultrasound demonstrated a gestational sac
containing a viable embryo whose size was consistent with
the period of amenorrhea. While the splenic area in the left
hypocondrium was found to be empty, a homogeneous and
elongate mass measuring 152
́
123 mm with a maximum thickness
of 53.4 mm was observed in the left iliac cavity above the
uterus. This mass, the ectopic spleen, was monitored by Doppler
velocimetry at monthly intervals until delivery and no variation
throughout gestation was observed; therefore, despite
the occasional occurrence of heavy pain, it was possible to
exclude circulatory complications such as thrombosis or
torsion. Doppler ultrasound proved to be a useful tool for
the differential diagnosis of this rare anatomical variation
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