1,721,059 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
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
Color Doppler sonography of focal lesions of the skin and subcutaneous tissue
No full textWe evaluated with color Doppler sonography 71 visible and palpable nodules of the skin and subcutaneous tissue from 51 patients. The nodules were classified as avascular (type I), hypovascular with a single vascular pole (type II), hypervascular with multiple peripheral poles (type III), and hypervascular with internal vessels (type IV). Of the 32 malignant nodules, 9% showed a type I pattern, 50% had a type IIE pattern, and 41% had a type TV pattern; of the 39 benign nodules, 86% showed a type I pattern and 14% had a type II pattern. The sensitivity and specificity of hypervascularity in malignant lesions were 90% and 100%, respectively, whereas the sensitivity and specificity of hypovascularity in benign lesions were 100% and 90%, respectively. The authors conclude that color Doppler sonography is able to increase the specificity of ultrasonography in the evaluation of nodular lesions of the skin
[The echographic and computed tomographic assessment of "spontaneous" hematomas of the abdominal wall].
No full textHematomas of the abdominal and pelvic wall are frequent findings, particularly in the patients undergoing long-term anticoagulant therapy. We reviewed a series of 9 cases of "spontaneous" hematomas of the rectus abdominis muscle (7 cases), of the obliquus internus muscle (one case) and of the gluteus muscles (one case) studied with US and CT. During the last 4 years, 9 patients complaining of the recent onset of a painful muscular swelling were examined: 8 of them were on anticoagulant therapy, while one was on long-term hemodialysis. They were examined with US (3.5 MHz, integrated with 7.5 MHz in 7 cases) and CT (contiguous 10-mm slices before and after i.v. contrast agent injection). Color Doppler was used in 3 cases. US showed different signs depending on hematoma onset and extent: the muscle was swollen, with an inhomogeneous structure with both coalescing liquid and echogenic areas in 2 cases, while the hematomas were bigger and appeared with mostly liquid areas and internal inhomogeneity due to blood clots in the remaining 7 cases. The evidence of pseudocystic areas with fluid blood levels (the so-called pseudohematocrit effect) was particularly specific of diffuse hematomas (4 patients). CT helped make the final diagnosis by showing the typical hyperdensity of fresh blood (at least 50 HU) in 9 cases and by defining the typical pattern of the pseudocysts with the hematocrit effect, but was useless in characterizing "pseudotumoral" lesions (3 cases), which were better defined by B-mode and color Doppler US. US is the examination of choice, even though it may misdiagnose small hematomas as muscular tumors or large hematomas as other diseases; color Doppler can be useful in the former case. CT usually permits the correct diagnosis by detecting fresh blood, which can however be found also in some muscular neoplasms
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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