1,721,079 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
Assessing prognosis in cholangiocarcinoma: a review of promising genetic markers and imaging approaches
No full textIntroduction: Despite the progress in the treatment of liver cancer, the prognosis of CCA remains poor and the surgical resection remains the only treatment with a potentially curative intent to date. Areas covered: Advances in the knowledge of cholangiocarcinoma regarding the mutational status and radiological of the tumor have been reviewed searching the most updated papers using MEDLINE and EMBASE databases. Recent studies have investigated the mutational status and the imaging features of CCA patients in order to identify new factors correlated with the prognosis in CCA patients who underwent surgical resection. Moreover, the discovery of some gene mutations has led to the development of personalized therapy in CCA patients. Investigation of the mutational profile of CCA patients has been characterized by analysis of the incidence of single-gene mutations, patterns of gene mutations as well as the role of ncRNa alterations. Two innovative radiological sectors (radiomics and radiogenomics), investigating the associations between the imaging features and the molecular profiles, have contributed to knowledge of CCA biology. Expert opinion: The analysis of the mutational profile and application of radiogenomics/radiomics represent promising fields in the identification of new targets toward a more personalized treatment approach for CCA patients
Primary liver cancer: Prognostic factors and predictive response to therapy
No full textPrimary liver cancer (PLC) is the fifth most common cancer in men and the seventh most common cancer in women. Up to 85% of cases occur in developing countries. Liver cancer is associated with a high mortality rate that is similar across various geographic regions. Hepatocellular carcinoma (HCC) accounts for up to 85% of all PLC cases. Usually HCC is a consequence of cirrhosis, but it can also develop in the absence of chronic hepatic disease in approximately 20% of patients, especially among those with more severe forms of non-alcoholic fatty liver disease (NAFLD). Currently, both Western and Eastern guidelines recommend only radiological diagnosis in patients with cirrhosis. The most widely accepted system is the Barcelona Clinic Liver Cancer (BCLC) staging system, which was updated in 2011 and was validated by several groups in Western countries. The BCLC staging system includes factors of both tumor morphology and degree of impairment of liver function, and it can be used to assign the proper treatment to patients with HCC. However, these treatment allocations have been criticized due to the exclusion from surgical resection of some patients who could potentially benefit from this type of therapy. The treatment of HCC varies in relation to the tumor stage and the degree of hepatic dysfunction. Liver transplantation and surgical resection with radical intent enables good long-term survival and excellent 5-year survival rates (70-50%). In addition, locoregional treatment can also achieve positive results, especially treatment of early-stage nodules. Intrahepatic cholangiocarcinoma (ICC), the second most common primary liver cancer after HCC, arises from the bile ducts of the second-order and usually presents as a mass inside the liver. CT and MRI imaging are the most useful imaging modalities for the diagnosis of ICC: imaging techniques show the location of the tumor, the possible multifocality of the lesion, the presence of venous or arterial invasion, and the presence of lymphnode involvement or distant metastases. According to the type of macroscopic growth, three types of ICC are described: mass forming (MF), periductal infiltrating (PI), and intraductal growing (IG). Radical surgical resection (R0) is the treatment of choice and the only one able to achieve long-term survival. In order to achieve radical resection, a major hepatectomy is often required, but this therapeutic option still has acceptable mortality and morbidity rates. Other PLCs (e.g., fibrolamellar hepatocellular carcinoma, epithelioid hemangioendothelioma, hepatoblastoma, sarcoma and lymphomas, combined HCC and ICC) are very rare, and surgery is the treatment of choice for these types of PLCs
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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