1,721,268 research outputs found
Popular Will and Aristocratic Government in Late Third Century BC Rome
Full text linkThis is Guido Clemente’s last and unfinished paper on the politics of the Roman Republic,
on which he was working shortly before passing away on 11 February 2021 and which his family
found amongst his papers. The essay deals with the contiones of the third and second century BCE,
whose institutional continuity throughout the Republic hides, he argues, the most profound socioeconomic changes. This work was part of a wider project on the nature of Roman Republican politics,
on which Clemente was planning to write a monograph and whose main lines of enquiry are presented
in the introduction that precedes the paper. To provide the reader with a fuller understanding of the
argument of the essay, the extended abstract written by Clemente himself is also reproduced
An unusual case of fulminant heart failure
No full textA 51-year-old patient presented with a 10-day history of breathlessness and back pain. Significant background his- tory included human immunodeficiency virus-2 and hepatitis C virus infections. Physical examination showed end-inspiratory crackles and muffled cardiac sounds and his blood test showed an increased aspartate aminotransferase level (500 IU/L), ala- nine aminotransferase level (654 IU/L), and lactate dehydroge- nase level (2354 IU/L). His chest radiograph confirmed pulmo- nary edema, and the echocardiogram showed severe pericardial effusion (2.5 cm). A computed tomography scan of the chest showed an incidental finding of a 5-cm liver mass at the liver dome. The patient was admitted to the intensive care unit to undergo percutaneous drainage of his pericardial effusion, and he died a few hours later of acute heart failure unresponsive to cardiovascular support. The patient underwent a post-mortem examination. The liver and the heart are shown in Figures A and B, respectively. Figure A shows a multifocal liver tumor ranging in size from 1 to 7 cm maximum. The heart, the pericardium, and the aortic arch were widely involved by metastatic deposits (Figure B). A section of the vertebral bones and the lungs also showed further small metastatic deposits. Initial histology of the liver lesions and the heart showed small-cell carcinoma (SmCC) (Figure C, tumor cells between myocardial cells, H&E, original magnification, 100). We performed immunohisto- chemistry on the pulmonary deposits to rule out a primary pulmonary SmCC. No positivity was seen for thyroid transcrip- tion factor-1, caudal type homeobox transcription factor 2, CK7, CK20, chromogranin, synaptophysin, or CD56. Immuno- histochemical stains for hepatocyte paraffin 1 (Figure D), car- cinoembryonic antigen, and -fetoprotein showed a strong pos- itivity and TTF-1 negativity. On the basis of the macroscopic framework and immunohistochemical features, a diagnosis of metastatic SmCC of the liver was made. Cardiac metastases from hepatocellular carcinoma are very uncommon.1 Hepatic SmCCs are even more uncommon: to our knowledge, only 13 cases have been reported.2 They usually present with locally advanced or metastatic disease, and no disease-free survivors have been reported to date. Interestingly, they do not show any association with chronic liver disease or with hepatitis C/hepatitis B viruses, and high fetoprotein levels also seem to be uncommon
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
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
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