1,721,199 research outputs found
“Mesentery-based surgery” to prevent surgical recurrence in Crohn’s disease: from basics to surgical practice
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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
Local regrowth after ʻWatch and Waitʼ strategy: is salvage surgery enough for disease control?
No full textAppropriate 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
Refined Mission Analysis for Heracles - a Robotic Lunar Surface Sample Return Mission Utilizing Human Infrastructure
Full text linkLaparoscopic versus open Hartmann’s reversal: a systematic review and meta-analysis
No full textBackground: Hartmann’s reversal is a major surgical procedure with consistent morbidity and mortality rates. Laparoscopy has been extensively applied to colorectal surgery providing significant benefits on short- and long-term outcomes. We performed a meta-analysis of the current evidence comparing the short-term outcomes of laparoscopic Hartmann’s reversal (LHR) to open Hartmann’s reversal (OHR). Methods: A systematic search of Medline, Scopus, Web of Science, Embase, and the Cochrane database was performed. Comparative studies reporting short-term outcomes of LHR versus OHR with an intention-to-treat analysis were considered for eligibility. Primary outcome was 30-day morbidity. Secondary outcomes were 30-day mortality, 30-day reoperations, length of hospital stay (LOS), operating time, and estimated blood loss. Results: Thirteen studies comparing 862 patients (403 LHR vs 459 OHR) were included. There was no difference in mortality, while LHR was associated with a reduced overall postoperative 30-day morbidity (OR, 0.24; 95 % CI, 0.16 to 0.34). Wound infections (OR, 0.54; 95 % CI, 0.35 to 0.85) and ileus (OR, 0.47; 95 % CI, 0.25 to 0.87) were more common after OHR. LOS was shorter in the laparoscopic group as it was the time to flatus. Meta-regression analysis showed that the results were independent from potential effect modifiers. Conclusions: LHR has less short-term complications than OHR in terms of overall morbidity, wound infection, and postoperative ileus. LOS is shorter in the LHR group, while no significant difference exists in the operating time. Randomized controlled trials are needed to confirm these findings on unbiased populations
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