1,721,023 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
Altered CSF protein pattern in a case of mycosis fungoides with nervous system involvement
No full textWe report the clinical, neurophysiological and CSF study in a case of mycosis fungoides with nervous system involvement. The CSF contained an abnormal protein of molecular weight 22000 that was not in the patient's serum or in the CSF of control subjects and that disappeared after intrathecal immunosuppressive therapy. The nature of this protein is discussed in the light of hypothesis regarding the pathogenesis of the disease
Age-related changes in dolichol (D) levels and autophagic-proteolytic (A/P) activity in rat liver.
No full textAbdominal weakness following herpes zoster
No full textA case of abdominal muscle weakness after a cutaneous thoracic-lumbar herpes zoster eruption in a 66-year old man is reported. The possible pathogenetic mechanism is discussed, and the role of electromyographic examination in defining the extension and prognosis of the disease is underlined
Charcot-Marie-Tooth disease: study of a large kinship with an intermediate form.
No full textA clinical, genetic, electrophysiological and ultrastructural study of a large kinship with peroneal muscular atrophy is reported. There was a noteworthy homogeneity in the phenotype as well as in the electrophysiological characteristics encountered in 15 affected members aged between 7 and 72 years. The symptoms appeared first in the second decade of life and stabilized by the fourth decade. There was no evidence of linkage of the neuropathy gene to the Duffy blood group locus on chromosome 1. The electrophysiological data in this family as well as the ultrastructural findings confirm that there is heterogeneity in hereditary motor and sensory neuropathy type I, and support the concept of an intermediate form of Charcot-Marie-Tooth disease
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
Short latency somatosensory evoked potentials in Charcot-Marie-Tooth disease. A family with an intermediate form.
No full text9 patients with Charcot-Marie-Tooth Disease (CMTD) of intermediate type (PMA type II, 10), all from the same family, presented with a significant increase of the interpeak N9-N13 latency. This increase is already present in the pre-symptomatic phase of the disease and there is no significant difference between the various patients of different ages and clinical severity, indicating that the lesions appears very early and tends to establish itself equally early. Similar behaviour is also seen in the distal conduction velocity along the sensitive fibres, while the more proximal areas seem to be relatively spared. The authors interpret these data as an expression of a distal central peripheral sensory neuropathy. In contrast, the lesion of the peripheral motor fibres, particularly in the legs, has a different and more severe pattern of evolution. Alterations in central conduction time (N13-N20) were not seen in any of the 9 patients studied
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