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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
Trattamento endoscopico del reflusso vescico-ureterale in bambini con duplicazione reno-ureterale completa: studio comparatvo con pazienti refluenti in singolo distretto. La ricerca clinica e sperimentale in chirurgia endoscopica e mini-invasiva pediatrica.
No full textSafety of Veress needle for laparoscopic entry in children: Myth or reality?
No full textIntroduction: Recent reports suggested that blind laparoscopic entry techniques, including Veress needle (VN), might increase the risks of potentially fatal complications. Materials and methods: All consecutive patients who underwent laparoscopy in two Pediatric Hospitals with the use of a Veress needle during a 14-year period have been included. In all cases the first trocar was a radially expanding one (STEP). Complications related to the insertion technique are reported as well as those related to the whole laparoscopic technique. Results: A total of 3463 patients younger than 18 years of age underwent laparoscopy between January 2006 and December 2019. Of these, 205 (5.9%) were younger than 6 months of age at surgery. Two-hundred-eighty-four patients (8.2%) previously underwent abdominal surgery. During first trocar insertion no major or minor vascular injuries occurred. Two patients (0.06%) experienced bowel lesions. Nine (0.26%) experienced failed entry. Fourteen patients (0.4%) experienced postoperative issues related to trocars positioning, namely, 9 omental eviscerations through port site insertion and 5 cases of hemoperitoneum owing to epigastric vessels lesion during operative trocar positioning. No other issues strictly related to laparoscopic entry technique have been recorded during the study period. No specific risk factors predisposing to complications have been identified but the presence of a positive history of previous abdominal procedures proved to be significantly related to a higher occurrence of bowel injury during Veress needle insertion (p = 0.0067). Discussion and conclusions: Although with a number of biases and limitations, our study suggests that creation of pneumoperitoneum with VN combined to first trocar entry with STEP technology in children can represent a safe alternative. An exception is represented by patients who underwent previous abdominal surgeries who should be approached with caution, possibly with an open approach. Anyway, given the relatively poor quality of high-quality studies on this regard, we strongly support the implementation of well-designed RCT in children in order to answer this delicate topic. Type of study: Retrospective. Level of evidence: I
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
Non-standard approach to infants and children with megacolon: laparotomy and endorectal pull-through for diagnosis and treatment in difficult countries with low resources in a non-profit setting: return to the past Soave's ERPT
No full textBACKGROUND: Hirschsprung's disease is an important cause of pediatric constipation with high risk of bacterial enterocolitis. Its diagnosis is histological and the suction biopsy is the gold standard. In resource-limited countries, the main diagnostic exam is the contrast enema and mini-invasive surgery lacks. We present the management of a cohort of patients with megacolon in Haiti, a low-resource country. METHODS: Children with megacolon and fecal impaction admitted at St Damien Children Hospital in Port-Au-Prince in June, August and December 2017 were included. We considered only patients with an evident transition zone on contrast enema who underwent endorectal pull-through (ERPT). Short term complications were recorded. RESULTS: Twenty children with clinical megacolon were admitted, eleven were included in the study. No suction rectal biopsy and intraoperative histological evaluation were performed. In ten children a Soave ERPTwith anastomosis at 5PODwas performed, in the other case a Boley primary anastomosis was preferred. One patient complicated with a peritonitis. No major complications were recorded. Colostomy was not considered a good option. CONCLUSIONS: In developing countries, Soave ERPT with definitive anastomosis after few days could be considered a valid option. Colostomy is suggested only in case of scant general conditions or bad colon appearance
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
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