1,720,987 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
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
Risk Factors for Early Mortality in Liver Transplant Patients
No full textBackground. Liver transplantation (LT) is an established treatment for patients with end-stage liver disease. The significant advances in surgical technique, immunosuppression therapy, and anesthesiological management have dramatically improved short- and long-term outcomes. The aim of this study is to correlate specific surgical and anesthesiological variables with causes of early death in LT recipients.
Methods. A retrospective observational analysis of adult patients who underwent LT in the period 2012 to 2016 and died within 90 days following LT was conducted. Exclusion criteria were intraoperative death, split liver, and domino transplant. Death was considered a dependent variable and classified into 3 different groups: death by sepsis, vascular events not related to the graft, and primary non-function. Donor and recipient variables were considered and analyzed using Fisher's exact test.
Results. Statistically significative associations (P value < .05) were found between renal function support, retransplantation, and the number of fresh frozen plasma units transfused in one group and early death due to sepsis in the other.
Conclusions. This study identified some risk factors associated with the specific cause of early death in liver transplantation. The clinical implications of these findings are the ability to stratify patients at high risk of early death by planning more intensive and accurate management for them
Intestinal surgery for crohn's disease: predictors of recovery, quality of life and costs
No full textAbstract
INTRODUCTION:
The aim of this prospective study was to analyze the impact of different surgical techniques on patients undergoing intestinal surgery for Crohn's disease (CD) in terms of recovery, quality of life, and direct and indirect costs.
PATIENTS AND METHODS:
Forty-seven consecutive patients admitted for intestinal surgery for CD were enrolled in this prospective study. Surgical procedures were evaluated as possible predictors of outcome in terms of disability status (Barthel's Index), quality of life (Cleveland Global Quality of Life score), body image, disease activity (Harvey-Bradshaw Activity Index), and costs (calculated in 2008 Euros). Univariate and multivariate analyses were performed.
RESULTS:
Significant predictors of a long postoperative hospital stay were the creation of a stoma, postoperative complications, disability status on the third post-operative day, and surgical access (R (2) = 0.59, p < 0.01). Barthel's index at discharge was independently predicted by laparoscopic-assisted approach, ileal CD, and colonic CD (R (2) = 0.53, p < 0.01). The disability status at admission showed to be an independent predictor of quality of life score at follow-up. The overall cost for intestinal surgery for CD was 12,037 (10,117-15,795) euro per patient and stoma creation revealed to be its only predictor (p = 0.006).
CONCLUSIONS:
Laparoscopy was associated with a shorter postoperative length of stay; stoma creation was associated with a long and expensive postoperative hospital stay, and stricturoplasty was associated with a slower recovery of bowel function
Diverting loopileostomy after restorative proctocolectomy: predictors of poor outcome and badpoor of life.
No full textAIM: Diverting loop ileostomy is used to minimize the impact of anastomotic
complication after restorative proctocolectomy (RPC). However, the ileostomy
itself may have complications and therefore affect quality of life (QOL). The aim
of this study was to analyse the predictors of complications of the ileostomy
formation and closure and of the QOL of these patients.
METHOD: Forty-four consecutive patients who underwent RPC were enrolled. Records
of the ileostomy follow-up were retrieved from a prospectively collected database
and QOL was assessed with the Stoma-QOL questionnaire. Ileostomy site coordinates
were measured. Univariate and multivariate analysis were performed.
RESULTS: In this series, three patients experienced peristomal herniae, two
ileostomy stenosis, seven ileostomy retraction and fourteen peristomal
dermatitis. Emergency surgery was the only predictor of parastomal hernia (P =
0.017). Stenosis correlated with the distance from the umbilicus (tau = 0.24, P =
0.021). Use of standard rod and retraction were independent predictors of
peristomal dermatitis (P = 0.049 and P = 0.001). Stoma-QOL was directly
correlated to the age of the patients and to the occurrence of parastomal hernia
(P = 0.001 and P = 0.021, respectively). After stoma closure, two patients
reported wound sepsis and seven suffered obstructive episodes.
CONCLUSION: The predictors of negative outcome after construction of a diverting
loop ileostomy after RPC were urgent surgery, use of standard rod, the distance
of the stoma site from the umbilicus, parastomal herniae and the older age of
patients
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