1,720,956 research outputs found
Body composition obtained from the body mass index
Full text linkBACKGROUND: Since obesity and related diseases are now considered epidemic, new
and more accurate formulas for epidemiological studies are of interest to the
scientific community. Several equations have been proposed to estimate the body
composition simply from anthropometric measurements. However, with time, the body
composition of the populations studied changes in relation to their food habits
and lifestyle, and, therefore, the equations must be regularly updated and
corrected.
AIM OF THE STUDY: The aim of the study was to develop new equations to determine
the body composition among the Italian population using the body mass index and
independently by variables such as age and body structure.
METHODS: Bioelectrical impedance and anthropometric analysis of 764 Italian
Caucasian subjects (342 females and 422 males), 11 to 80 years of age, were
analysed. Females and males were analysed separately. Multiple regression
analyses were performed in order to estimate the body composition of the
subjects. The estimated masses were then compared with the measured masses using
Bland and Altman plots. We also calculated the differences between the estimated
and measured masses, reported as % of the body weight, for the 95, 85 and 75
degrees percentile of the female and male groups. Finally we compared our
formulas with the Watson equations, which are used to estimate the total body
water.
RESULTS: All body masses estimated were positively correlated to the measured
values. Moreover, at any percentile analysed, our formulas resulted more precise
than the Watson formula. Equations: Females: FM = 1.9337 BMI - 26.422; FFM = BW -
FM; BCM = 0.3655 FFM + 4.865; TBW = 0.5863 FFM + 7.1732; Males: FM = 1.407 BMI -
21.389; FFM = BW - FM; BCM = 0.4485 FFM + 3.3534; TBW = 0.6997 + 1.4567.
CONCLUSIONS: Although an inevitable inaccuracy must be expected in
epidemiological studies, our equations are adequate to analyze the body
composition state and changes occurring among the Italian population by simply
considering weight and height
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
Hypericum perforatum methanolic extract inhibits growth of human prostatic carcinoma cell line orthotopically implanted in nude mice.
Full text linkThe antiproliferative effect of serotonin-reuptake inhibitors (SSRI) and serotonin antagonists has been demonstrated in
prostate tumors. Since Hypericum perforatum components act as serotonin-reuptake inhibitors and exert cytotoxic effects on
several human cancer cell lines, in this work we analyzed the effect of a treatment with Hypericum perforatum extract (HPE) on
the growth of human prostate cancer cells in vitro and in vivo. This study highlighted a significant reduction of tumor growth
and number of metastasis suggesting that this natural compound may be useful in the treatment of prostate cancer
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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