1,721,006 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
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
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
Synchronous laparoscopic right colectomy and rectal resection – a video vignette
No full textSynchronous colorectal carcinoma is defined as the presence of two or more primary invasive adenocarcinomas identified in an individual at the time of first diagnosis [1]. A common question on intra-operative surgery that is posed to surgical trainees during colon and rectal procedures is whether or not it is safe to perform synchronous colonic resection and an anastomosis [2]. The laparoscopic approach is feasible in double colonic resection and may always be considered to improve postoperative outcomes [3]. We present a laparoscopic approach for synchronous caecal and rectal carcinoma, using a three-trocar technique, in an 82- year-old male patient with CT-confirmed absence of the left branch of the middle colic artery. The aim of the didactic Video S1 was to demonstrate a feasible technique for laparoscopic right colectomy and rectal resection, using a primary vascular approach. Video S1 concentrates on the key vascular steps needed to perform a radical lymphadenectomy safely. The first step of our technique is identification and sealing of the ileocolic pedicle using the energy device Ligasure AdvanceTM (Coviden, Mansfield, Massachusetts, USA; which combines monopolar tip dissection and a vessel sealer divider and is associated with reduced blood loss and operative time [4]), dissection of the duodenum and the pancreas with high sealing of the right branch of the middle colic vessels, then medial to lateral dissection of the right retrocolic space along Toldt’s fascia. According to the principles of the ‘no touch’ technique, the right colon is only mobilized laterally after the vascular supply has been interrupted, which also facilitates retraction during the medial to lateral dissection. After right colonic resection, we perform a primary anastomosis with a completely intracorporeal side-to-side stapled isoperistaltic anastomosis between the distal ileum and transverse colon, and finally a laparoscopic hand-sewn double-layer closure of the enterotomy. Rectal resection is conducted using the same principles of ‘medial to lateral’ shown above, with a stapled end-to-end colorectal anastomosis; the specimens are extracted through a 4-cm minilaparotomy incision, as shown at the beginning of Video S1. The patient’s postoperative course was uneventful, and the results of the histology performed on the specimens extracted during the procedure was ypT3N0R0 for the caecum and ypT2N0R0 for the rectum. The laparoscopic approach for synchronous colonic cancer is safe and effective, but careful patient selection with accurate preoperative staging is paramount. A major vessel sealing device, used as reported in our previous study may reduce the operative time, number of surgical instruments and cost
Technique of laparoscopic splenectomy
No full textBackground: Indications for laparoscopic splenectomy have rapidly increased and it is now considered the standard approach for almost all diseases requiring splenectomy, including benign and malignant disease. The aim is to evaluate the safety and effectiveness of laparoscopic splenectomy in a large cohort of patients in a laparoscopic referral center. Methods: We retrospectively analyzed 141 patients undergone surgery for spleen-related diseases from 2010 to 2019. All patients underwent laparoscopic splenectomy were selected according to European Association for Endoscopic Surgery guidelines. Exclusion criteria were American Society of Anesthesiologists (ASA) IV and severe portal hypertension and spleen diameter >30 cm. Early and mid-term results have been evaluated. Results: From 2010 to 2019, 108 patients underwent laparoscopic splenectomy. Mean operative time was 70 min (range, 50-120 min) with a conversion rate of 4.6% (5 patients). Among the 105 patients completed laparoscopically, 21 (20.4%) postoperative complications were reported: 2 early hemorrhage (2%), 4 (3.7%) fluid collections in the splenic fossa, 6 (5.5%) pneumonia and atelectasis and 9 (8.3%) cases of transient fever. Sixty-six patients (64.1%) reported mild pain, 22 patients (21.4%) moderate pain and 15 patients (14.6%) had severe pain. The 15 patients (14.6%) undergone specimen extraction through the suprapubic incision reported a higher pain compared with those in which spleen morcellation was performed (6.2 vs. 3.4, P<0.05). The mean hospital stay was 4 days (range, 3-6 days), with a mean time to return to normal activity of 7 days (range, 4-10 days). No late complications during the mean 3 years follow-up (range, 1-4 years) were observed. Conclusions: Laparoscopic splenectomy is safeness and effectiveness despite it requires extensive experience in laparoscopic surgery, adequate patient positioning and trocars positioning
- …
