1,721,343 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
Retroperitoneal endometriosis in postmenopausal woman causing deep vein thrombosis: case report and review of the literature
No full textEndometriosis is an uncommon disease in postmenopausal women (PMW), ranging from 2% to 5% of cases, and it is very important to exclude neoplastic transformation of the endometrium. The authors would like to introduce the case of a 63-year-old overweight patient with abdominal pain associated to pain and swelling of the left inferior limb occurring for approximately six weeks. The CT X-ray of the abdomen revealed the presence of a retroperitoneal mass causing deep vein thrombosis because of extrinsic compression of the left iliac vein. Following removal of the pelvic masses with laparotomy, the histological exam revealed an endometriosis. The CT X-ray carried out after a month postoperatively revealed the root canal treatment of the left femoral vein with a considerable decrease of the thrombosis of homolateral external iliac veins. Despite the endometriosis, it is uncommon in women who have reached menopause and must be considered in the differential diagnosis of pelvic masses
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
Outcomes of second stage cesarean section following the use of a fetal head elevation device: A systematic review and meta-analysis
No full textObjectives: To explore maternal and perinatal outcomes of women undergoing full dilatation cesarean section (CS) who had compared to those who did not have application of fetal head elevation device (FHED). Material and methods: Pubmed, Embase, Cinahl, Clinical Trial.Gov and Google Scholar databases were searched. Inclusion criteria were studies exploring maternal and perinatal outcomes in women having compared to those not having FHED at full dilatation CS. The outcomes explored were: hysterotomy to delivery time (sec), mean estimated blood loss (ml), blood loss > 1000 mL, need for blood transfusion, uterine incision extension, operative complications, need for re-operation, urinary retention, hospital re-admission, length of in hospital stay, Apgar score < 3 at 1 min, Apgar score < 7 at 5 min, neonatal arterial Ph, arterial pH < 7.1, admission to neonatal intensive care unit (NICU), neonatal sepsis, need for neonatal endotracheal intubation, neonatal death. Random effect head-to-head meta-analyses combining summary mean difference (MD), and odd ratio (OR) were used to analyze the data. Results: Ten studies (1326 women) were included. The mean time from hysterotomy to delivery was lower in women having compared to those not having FHED (MD: -52.26 s, 95 % CI -55.2 to -34.94, p < 0.001). Women who had FHED had also a lower mean estimated blood loss (MD: -130.82 mL, 95 % CI -130.1 to -381.0; p < 0.001) and a shorter stay in the hospital (MD: -0.884 h, 95 % CI -1.07 to -0.70; p < 0.001) compared to controls. Pregnant women having FHED at full dilatation CS had a lower risk of uterine incision extension (OR: 0.50, 95 % CI 0.3 to 0.9; p = 0.02), need for blood transfusion (OR: 0.39, 95 % CI 0.2 to 0.7; p = 0.04) and operative complications (OR: 0.44, 95 % CI 0.2 to 0.9; p = 0.03) compared to controls, while there was no difference in the other maternal outcomes between the two groups. When exploring perinatal outcome, women who received FHED had higher mean arterial pH values (MD: 0.617, 95 % CI 0.43 to 0.88; p < 0.001) and a lower risk of neonatal sepsis (OR: 0.10, 95 % CI 0.01 to 0.99; p = 0.05) and admission to NICU (OR: 0.63, 95 % CI 0.5 to 0.9; p = 0.008) compared to controls. Conclusion: Application of FHED at full dilatation CS seems to be associated with improvement in some maternal and neonatal outcomes. © 202
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