1,720,972 research outputs found
Management of ureteral endometriosis: areas of controversy.
No full textIn this review we critically evaluate what we know and what we still do not know about pathogenesis, diagnosis and treatment of ureteral endometriosis, highlighting areas of controversy.Recent studies have produced new insights into diagnostic and management options for ureteral endometriosis.The diagnosis of ureteral endometriosis entails a high index of suspicion for the disorder. Imaging techniques are of limited value in providing an accurate depiction of extension of ureteral lesions. Preliminary results suggest that magnetic resonance urography is accurate in differentiating between intrinsic and extrinsic forms of ureteral involvement, but further studies are required to define its role in directing better treatment. Current controversies in the treatment of ureteral endometriosis are over whether segmental resection and anastomosis or ureterolysis are indicated, and whether minimal-access procedures are equally effective than their traditional open counterparts. Recent studies suggest that laparoscopic ureterolysis can be an effective treatment option in most patients with ureteral endometriosis but that recurrence rates are not negligible, as suggested in pioneering works. Successful application of laparoscopic surgery, even for procedures that have traditionally necessitated laparotomy, has been reported. Extensive experience with endourological techniques is prerequisite for success
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
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
Ultrasonographic measurement of thymus size in IUGR fetuses: a marker of the fetal immunoendocrine response to malnutrition
No full textObjective To test the hypothesis that intrauterine growth
restriction (IUGR) is associated with decreased thymus
size in the human fetus.
Methods The thymus perimeter was measured in
60 consecutive IUGR fetuses at prenatal ultrasound
examination. IUGR was defined as an abdominal circumference
(AC) <5th centile. Sixty controls were identified
by selection of the next consecutive appropriately grown
fetus of similar gestational age (±1 week). To exclude
fetal size effects, ratios between thymus perimeter and
fetal biometry measurements including biparietal diameter
(BPD), AC and femur length (FL), as well as estimated
fetal weight (EFW) were compared between IUGR fetuses
and controls.
Results The proportion of fetuses with thymus perimeter
<5th centile for gestation was significantly
higher in IUGR fetuses than in controls (58/60 vs.
7/60, P < 0.0001). The mean thymus perimeter/BPD
ratio (0.87 ± 0.20 vs. 1.13 ± 0.13, P < 0.0001), thymus
perimeter/AC ratio (0.28 ± 0.06 vs. 0.35 ± 0.03,
P < 0.0001), thymus perimeter/FL ratio (1.18 ± 0.26
vs. 1.51 ± 0.19, P < 0.001) and thymus perimeter/EFW
ratio (0.05 ± 0.01 vs. 0.06 ± 0.01, P = 0.02) were significantly
lower in IUGR fetuses than in controls. There was
a significant positive correlation between the observed-toexpected
mean for gestation thymus perimeter ratio and
the enrolment-to-delivery interval (r = 0.44, P < 0.001).
Conclusion IUGR is associated with a disproportionately
small thymus. This supports the hypothesis that thymic
involution may be part of the fetal neuroendocrine
response to intrauterine starvation
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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