1,720,971 research outputs found
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
'Trifecta' outcomes of robot-assisted partial nephrectomy: Results of the 'low volume' surgeon
No full textReis, AlessanRSS/0000-0001-8486-7469WOS: 000560788000006PubMed: 32822123Objective: There is limited data regarding surgeon volume and partial nephrectomy outcomes. the aim of this study is to report trifecta outcomes of robot-assisted partial nephrectomy (RAPN) performed by the low volume surgeon. Materials and Methods: Thirty-nine patients with clinical T1-2 renal tumors who underwent RAPN between 2012 and 2018 were included in this study. Trifecta was defined as negative surgical margins, warm ischemia time <= 20 minutes, and no operative complications. Patient demographics, R.E.N.A.L. nephrometry score, operation time, estimated blood loss, warm ischemia time, length of hospital stay, renal functions, and oncological outcomes were analyzed retrospectively. Complications were graded based on the modified Clavien-Dindo classification system. Results: the median R.E.N.A.L. nephrometry score was 6 (4-10). RAPN was successfully performed in all but one patient. the median operation time was 180 (90-240) minutes. Warm ischemia was performed only by segmental renal artery control in 35 and, by main renal artery control in three patients. the off-clamp technique was used in two patients. the median warm ischemia time was 16 (0-31) minutes. Seven patients had a warm ischemia time of longer than 20 minutes. Three patients had postoperative complications. the surgical margin was positive in one patient. As a result, the trifecta was achieved in 30 of the 39 patients (77 %). Conclusion: RAPN is a safe and effective minimally invasive alternative in the treatment of renal masses. the present study suggests that reasonable trifecta rates can be achieved even by low volume surgeons
Robot-assisted Partial Nephrectomy with Segmental Renal Artery Clamping: A Single Center Experience
No full textWOS: 000497596300010PubMed: 30852838Purpose: the aim of our study is to evaluate the feasibility and effectiveness of robotic partial nephrectomy performed with segmental clamping of tumor-feeding arteries. Materials and Methods: Thirty-six patients with renal tumor who underwent robotic partial nephrectomy with segmental renal artery clamping were included in this study. Prospectively recorded patient demographics, mean operation time, estimated blood loss, warm ischemia time, length of hospital stay, pre- and postoperative renal functions and oncological outcomes were analyzed retrospectively. All complications were graded based on the modified Clavien-Dindo classification system. Surgical success was defined as no conversion from segmental artery clamping to the main renal artery clamping. Results: Mean tumor size was 40 mm and, R.E.N.A.L nephrometry score was 6.74. Mean operation time, estimated blood loss and warm ischemia time were 162 min, 236 ml, and 16 min, respectively. Five postoperative complications were observed. There were no significant differences in terms of renal functional outcomes before and after surgery (P =.18). of 36 patients, 34 were completed successfully; however, main renal artery clamping was required in two patients due to excessive bleeding from the tumor bed. the success rate of the segmental renal artery clamping technique was determined as % 94.4 (34/36) in our study. Conclusion: Segmental renal artery clamping may be considered as a reliable and effective surgical method for vascular control during robotic partial nephrectomy. For this technique, tumor characteristics and intrarenal vascular anatomy should be precisely evaluated by the preoperative contrast-enhanced computerized tomography with 3-D reconstruction
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
Robot Assisted Radical Prostatectomy in A Patient with Previous Abdominoperineal Resection and Pelvic External Beam Radiation Therapy
No full textWOS: 000437812800012PubMed ID: 29277880Though previous major abdominal surgery and pelvic irradiation may be a significant drawback of subsequent laparoscopic procedure, technological advances such as better visualization and more controlled finer movements of robotic arms allowing better dissection in robotic-assisted laparoscopic surgery may reduce some of these challenges. However, limited data are available on the effect and safety of robotic surgery in these patients. The aim of this case report is to present efficacy and safety of robot assisted radical prostatectomy in a patient who has rectal and concurrent prostate cancer with the history of abdominoperineal resection, pelvic irradiation and adjuvant chemotherapy
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
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