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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
POSTURAL EFFECTS ON CIRCADIAN-RHYTHM OF BLOOD-PRESSURE AND HEART-RATE IN YOUNG AND ELDERLY SUBJECTS
No full textPlasminogen activators (urokinase) mediate neovascularization: possible role in tumor angiogenesis.
No full textPostural effects on the circadian rhythm of blood pressure and heart rate in young and elderly subjects.
No full textThis investigation compares the effects of changes in activity-rest patterns on the 24-hr rhythms of blood pressure and heart rate in elderly and young subjects. Blood pressure and heart rate were monitored by means of noninvasive, automatic, quasiportable recording equipment. The subjects either rested both diurnally and nocturnally or were active diurnally and rested nocturnally. Time-qualified data were analyzed for circadian rhythmicity by means of the cosinor procedure. In both activity-rest patterns, elderly subjects showed a dissociation between circadian rhythms of blood pressure and heart rate due to a peculiar shift of acrophases. Because of the particular timing of the acrophase, elderly subjects differed from young individuals in the overall adaptation of the blood pressure and heart rate 24-hr patterns to upright posture and physical activity. Of particular interest is the reduced amplitude in the circadian rhythm of blood pressure, which might contribute to the compromised orthostatic tolerance of older people
May a lymphocytic infiltration have a pathogenic role in an aldosterone-producing adrenal tumor?
No full textA 38-year-old woman is described to have a primary hyperaldosteronism due to an aldosteronoma with foci of lymphocytic infiltration. The finding suggests: a concomitant lymphoid adrenalitis; or, an immunological attack to neoplastic cells. The hypothesis is that there may be a relationship in the association. The lymphocytic infiltrates could have a pathogenic role in the development of the aldosterone-producing adrenocortical neoplasm by interrupting some inhibitory mechanism(s) of the cells that secrete aldosterone
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
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