1,720,982 research outputs found
Design of aluminium structures for the entertainment industry and analysis of the behavior in fire conditions
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FUNCTIONAL PROFILE OF EXPANDED SUPPRESSOR CYTOTOXIC LYMPHOCYTE POPULATION IN A PATIENT WITH ACTINIC RETICULOID
No full textThis study was undertaken to gain insight into the functional properties of the expanded suppressor/cytotoxic lymphocytes characteristically found in actinic reticuloid. Peripheral blood cells, either whole mononuclear cell populations or selectively enriched populations, were obtained from a patient with well-established actinic reticuloid. The patient had an expansion of circulating T lymphocytes expressing the suppressor/cytotoxic phenotype, i.e., CD3+, CD4-, CD8+. A proportion of these cells also expressed the Fc receptor for IgG. Functional studies, including pokeweed mitogen-driven immunoglobulin synthesis, mitogen and alloantigen response, natural killer and antibody-dependent cellular cytotoxicity were within normal ranges and suggested a polyclonal rather than monoclonal expansion. The present functional data extend previous phenotypic studies and support the hypothesis that a chronic reactive immunoregulatory disorder is involved in actinic reticuloid, as has been hypothesized for other T cell chronic proliferations
BASAL KERATINOCYTE SUBSETS - ULTRASTRUCTURAL AND MORPHOMETRIC FEATURES
No full textBasal keratinocytes reportedly comprise two ultrastructurally recognizable populations, usually referred to as serrated basal keratinocytes (SBK) and non-serrated basal keratinocytes (NSBK). The former are responsible for dermal-epidermal anchoring, whereas the latter serve in epidermal turnover (stem cells). The size and shape of these cells were investigated by electron microscopy and computer-assisted morphometric analysis. The results showed that perimeters of both the nucleus and cytoplasm of NSBK were consistently smaller than those of SBK. The shape factor (contour index) was lower in NSBK, indicating a more regular membrane surface. Present quantitative results substantiate previous subjective reports on the ultrastructural differences between NSBK and SBK and provide additional evidence that the basal cell layer in human epidermis is actually made up of at least two types of morphologically distinct keratinocytes
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
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