1,721,086 research outputs found
Giants of Cardiothoracic Surgery: Professor Martin Elliott
No full textIn this interview, Shruti Jayakumar of King’s College London School of Medicine in the UK and Martin Elliott of the Great Ormond Street Hospital for Children in London, UK, discuss his path to and experience in congenital heart surgery. Professor Elliott describes the importance of recognizing the patient, safety and outcomes, leadership and teamwork, and challenges facing congenital heart surgery in the UK. He also discusses how to overcome the ethics of what surgeons do, the cost of care, and his advice for trainees.
Visit Professor Elliott’s website at martinelliott.me
Seeing Through the Lies: Surgical Innovation and the Need for Transparency
No full text The Robert E Gross Lecture was delivered by Professor Martin Elliott of London, at Boston Children’s Hospital June 1st, 2016. Professor Elliott makes a plea for revision to the system of medical publication and academic reward, especially in the field of surgery. </jats:p
The UK National Tracheal Service: An Interview With Martin Elliott
No full textLeanne Harling of Imperial College in London, UK, interviews Martin Elliott of the Great Ormond Street Hospital for Children in London about the establishment of the UK National Tracheal Service and his experience with tracheal surgery. They discuss long-segment tracheal stenosis, other tracheal pathologies, and surgical technique tips for slide tracheoplasty. Professor Elliott emphasizes the importance of teamwork and multidisciplinary care in improving surgical outcomes. Finally, they discuss tracheal replacement, how to approach compassionate use decisions, and the importance of increased transparency in research.
Visit Professor Elliott’s website at martinelliott.me
Mechanistic and synthetic studies of the intramolecular [4+2] cycloaddition of conjugated enynes
No full textThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2004.Vita.Includes bibliographical references.An examination of the mechanism and scope of the intramolecular [4+2] cycloaddition of conjugated enynes has shown the reaction likely proceeds by a concerted cycloaddition of the enyne to give a highly reactive cyclic allene intermediate which isomerizes to aromatic and dihydroaromatic compounds through proton transfer or hydrogen atom transfer mechanisms. Studies of the intramolecular cycloaddition of conjugated arylacetylenes (arenynes) indicated that these compounds may react by a stepwise annulation mechanism involving biradical intermediates. An investigation of the use of protic solvents has shown that alcohols, in particular 2,2,2-trifluoroethanol, can significantly improve the isolated yield of products. The application of strained cyclic acetylenes, specifically arynes generated by a modification of the Kobayashi protocol with tetrabutylammonium triphenyldifluorosilicate (TBAT), has been shown to efficiently provide cycloaddition products with substituted enynes, arenynes, and hetarenynes at room temperature.by Martin Elliott Hayes.Ph.D
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
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