1,720,955 research outputs found
Microsurgery versus laparoscopy in distal tubal obstruction hysterosalpingographically or laparoscopically investigated
No full textOBJECTIVE: To compare pregnancy rates after laparotomic microsurgical or laparoscopic distal tuboplasty. DESIGN: Two hundred and twenty-four women with infertility due to distal tubal occlusion were randomized to be treated with either laparotomy or laparoscopy from 1987 to 2001 at the Institute of Gynaecology and Obstetrics, University of Rome, "La Sapienza". RESULTS: The results were evaluated taking into account the type of surgical approach, the severity of tubal damage and of adhesions. After a 24-month follow-up period, the overall pregnancy rate obtained with microsurgery was 43.7%, of which 33.3% were term pregnancies, 5.0% abortions, and 5.0% ectopic pregnancies. After laparoscopy, the overall pregnancy rate was 41.6%, of which 29.1% were term pregnancies, 8.3% abortions and 3.9% ectopic pregnancies. No significant differences was observed between the two groups in terms of fertility rate (chi-square 0.016, p = 0.9003). CONCLUSIONS: Laparotomy plus microsurgery and laparoscopy were equally effective in restoring fertility in women with comparable tubal damage. The severity of the damage is a critical factor for the results
Laparoscopic surgery for the management of ovarian endometriomas: a fertility sparing approach?
No full textAbstract BACKGROUND: Treatment for mild and moderate endometriosis is controversial, whereas ovarian endometriomas of diameter > 3 cm must be treated surgically. A minimally invasive and inexpensive surgical approach should be always preferred. The objective of this randomized, prospective, clinical trial was to assess operative time, hemostasis, accuracy, recurrence rates, and pregnancy outcomes of 2 different laparoscopic techniques for management of ovarian endometriomas. MATERIAL/METHODS: Ninety-two patients with ovarian endometriomas were randomized to undergo direct stripping of cystic wall from the initial adhesion site (group A), or circular excision of ovarian tissue around the initial adhesion site and then stripping (group B). Pregnancy outcome results were retrieved at 36 months after surgery. Recurrence rate corresponded to evaluation at 4 and 12 months after surgery performed by transvaginal ultrasound and Ca125 serum level. RESULTS: Direct stripping leads to bleeding more frequently than does circular excision. Hemostasis at the ovarian hilus does show differences between groups; an easy exposure of damage after circular excision reduces execution time. Cumulative pregnancy outcomes at 36 months, and recurrence rates during follow-up, did not significantly differ among techniques. CONCLUSIONS: Circular excision of endometrioma cystic wall reduces surgical time, and results in better hemostasis. In addition, excision techniques allow complete removal of the cystic wall in 93% of cases (compared to 74.5% for direct stripping technique), showing differences in recurrence rate, and bringing about a better pregnancy. Data are not statistically significant owing to the small number of collected cases
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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