1,721,026 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
Three-Year Outcome following Holmium Laser Enucleation of the Prostate Combined with Mechanical Morcellation in 330 Consecutive Patients
No full textObjectives: A prospective study to assess safety, efficacy, and medium-term durability of holmium laser enucleation of the prostate (HoLEP) combined with mechanical morcellation for the treatment of bladder outlet obstruction (BOO) due to benign prostate enlargement (BPE). Methods: Between January 2000 and July 2003, 330 consecutive patients underwent HoLEP at our institution. All patients were pre-operatively assessed with transrectal ultrasound gland volume evaluation, maximum urinary flow rate (Qmax), international prostate symptoms score (IPSS), and the single-question quality of life (QoL). Intra-, peri-, and postoperative parameters were evaluated and the patients were reassessed at 1-, 3-, 6-, 12-, 18-, 24-, and 36-mo follow-up with the same examinations. Results: Patients' mean age was 66 ± 8.1 yr; prostate volume was 62 ± 34 cc. Enucleation time was 45.4 ± 22.9 min and morcellation time 17.3 ± 14 min, whilst resected weight was 40 ± 27.5 g. Catheter time was 23 ± 14.7 h and hospital stay was 48 ± 26 h. Mean serum hemoglobin and sodium did not drop significantly from baseline after the procedure (p = 013). A significant improvement occurred in Qmax (25.1 ± 10.7 ml/s), IPSS (0.7 ± 1.3), and QoL (0.2 ± 0.5) at the 3-yr follow-up compared with baseline (p < 0.05). Twenty-eight percent of patients complained of irritative urinary symptoms, typically self-limiting after 3 mo; transient stress incontinence was reported in 7.3% of patients. Nine patients (2.7%) had persistent BOO, requiring reoperation. Conclusions: HoLEP represents an effective and safe surgical intervention. The relief from BOO also proved to be durable after 3-yr follow-up. The present report adds to the evidence that HoLEP could be the standard "size-independent" surgical treatment for symptomatic BPE-related BOO. © 2007 European Association of Urology
A Simple Mathematical Approach to Calculate Blood Loss in Radical Prostatectomy
No full textIntroduction: The aim of this study was to apply a simple mathematical approach to calculate blood loss in 126 patients undergoing radical retropubic prostatectomy (RRP). Materials and Methods: Perioperative red blood cell loss (RBCL) was estimated by adding the difference in circulating red blood cells from before to after surgery to the allogeneic red blood cells transfused in the same period. Results: Mean preoperative hematocrit was 45 ± 4% and mean perioperative RBCL was 574 ± 297 ml, corresponding to a mean equivalent whole blood loss (WBL) of 1,479 ± 831 ml. Twenty of 126 patients (15.9%) received 42 units of allogeneic packed red blood cells (PRBC), for a mean of 2.1 ± 1.2 U/patient. The transfusion rate was higher in patients with a preoperative hematocrit of 40% or less (45 vs. 13%, p = 0.014). Conclusions: Anatomical RRP is still associated with appreciable operative blood loss. Owing to the high preoperative hematocrit values, the allogeneic blood transfusion rate is low and the transfusion requirement of the majority of patients is limited to about 2 units of PRBC. Preoperative autologous blood augmentation strategies may not be routinely needed for patients with a basal hematocrit of >40%
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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