1,720,962 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
Minimally invasive video-assisted thyroidectomy: reflections after more than 2400 cases performed.
No full textBACKGROUND:
The minimally invasive video-assisted approach was developed for primary hyperparathyroidism in 1997 and the year after for thyroid disease. Since then, the technique has been adopted worldwide, and indications moved from the initial benign disease to low-risk and intermediate-risk carcinoma, demonstrating a level of oncologic radicality comparable to the conventional open approach when inclusion criteria are strictly respected.
METHODS:
Between 1998 and 2014, 2412 minimally invasive video-assisted thyroidectomies (MIVAT) were performed in our department. The indication for surgery in 825 patients (34.3 %) was a malignant tumor, in particular, a papillary carcinoma in 800 patients. Among them, 528 patients operated on between 2000 and 2009 had a mean complete follow-up of 7.5 (standard deviation, 2.3) years.
RESULTS:
A total thyroidectomy was performed in 1788 patients (74.1 %) and a hemithyroidectomy in 564 (23.4 %). Also performed was central compartment lymphadenectomy in 31 patients (1.3 %) and parathyroidectomy for the presence of a solitary parathyroid adenoma in 29 (1.2 %). Mean duration of the procedure was 41 (standard deviation, 14) minutes. After a mean follow-up of 7. 5 years, 528 patients who underwent MIVAT for low-risk or intermediate-risk papillary carcinoma presented a cure rate of 85 % (undetectable thyroglobulin), comparable with the 80 % rate reported in patients who had undergone open thyroidectomy during the same period.
CONCLUSIONS:
After a long experience and a considerable number of procedures performed in a single center, MIVAT is confirmed as a safe operation, with a complication rate comparable with open thyroidectomy. MIVAT offers a cure rate for the treatment of low-risk and intermediate-risk malignancies that is comparable with an open procedure when inclusion criteria are strictly respected
Track Recurrence after Robotic Transaxillary Thyroidectomy: A Case Report Highlighting the Importance of Controlled Surgical Indications and Addressing Unprecedented Complications
No full textBackground: Robot-assisted transaxillary thyroid surgery (RATS), widely accepted and used in Asian countries, can be an appealing treatment option both for patients with major concerns regarding a cervical scar and for their surgeons. Patients benefit from scarless neck surgery, while their surgeons benefit from improved dexterity and ergonomics compared with remote-access endoscopic thyroid surgery. However, validating any novel surgical procedure for thyroid pathology should be based on evidence regarding its feasibility, radicality, and safety compared to the time-honored, safe and effective, conventional open thyroidectomy. It should also be evaluated for potential risks that are not present with conventional approaches. Patient findings: This study reports a patient with surgical track and cervical nodal recurrence, and distant metastasis following a two-stage robot-assisted surgery, and radioactive iodine ablation therapy for a papillary thyroid carcinoma that was initially regarded a single indeterminate nodule. Summary: This case emphasizes the importance of thoroughly evaluating the oncological safety of RATS, and points out the possibility of "malignant seeding along the surgical access" being an untraditional potential complication associated with the procedure. Conclusions: While tailoring the surgical strategy to the patients' concerns and desires is important, adhering to fundamental onco-surgical principles is a priority. Furthermore, unconventional complications associated with novel surgical procedures should be properly evaluated and addressed
Increased costs of perioperative risk assessment for thyroid surgery in elderly people (over 80 years) presenting with benign disease
No full textBackground/objectives: Evaluate how surgical treatment of benign thyroid disease in elderly people is prone to induce an increase of costs in the next future due to the aging process of the population. Methods: A retrospective analysis has been performed on a total of 116 patients operated between January 2007 and September 2011, divided in a group of 58 patients aged over 80 years (Group A) and 58 patients younger than 80 years (Group B). The analyzed data included age, preoperative diagnosis, severe co-morbidities, procedures other than standard needed to evaluate anaesthesiological risk, postoperative hospital stay, complications, duration of postoperative intensive care monitoring, pathologic characteristics, and costs of anaesthesiological risk assessment. Results: Statistical analysis of collected data showed that the costs related to perioperative risk assessment (p value < 0.001) and the duration of hospital stay (p value < 0.001) were higher in Group A than in Group B. Instead, surgery-related complications were not statistically different. Conclusions: Despite feasibility and safety of modern surgical techniques, indications for surgery in elderly patients affected by benign thyroid disease should be reserved mainly for those patients with severe medical necessity. © 2013 Springer-Verlag Berlin Heidelberg
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
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