1,721,769 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
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
Mullarian-inhibiting substance reflects ovarian findings in women with polycystic ovary syndrome better than does inhibin-B
No full textObjective: To investigate Müllerian-inhibiting substance (MIS) levels in women with polycystic ovary syndrome
(PCOS), as well as relationships to ovarian morphology, levels of inhibin B, and other reproductive hormones.
Design: Prospective clinical study.
Setting: Academic endocrinology centers in Palermo, Italy and New York.
Patient(s): Forty-six women with PCOS, recruited on the basis of the classic criteria of chronic anovulation and
hyperandrogenism, and 25 age-matched ovulatory controls.
Intervention(s): Fasting blood was obtained in all subjects in the early follicular phase (days 5–6) after
spontaneous or induced menses (in PCOS), and transvaginal ultrasounds were performed.
Main Outcome Measure(s): Assessment of values for luteinizing hormone (LH), testosterone (T), androstenedione
(A), estradiol (E2), inhibin B, MIS, fasting insulin, and the calculated quantitative sensitivity check index
(QUICKI), as well as assessments of ovarian volume and blood flow.
Result(s): Women with PCOS had higher LH, T, and A; higher insulin and lower QUICKI; and higher ovarian
volume and lower pulsatility index. Inhibin B concentrations were statistically significantly higher in PCOS
patients (70 8.0 vs. 40 3.4 pg/mL), as was MIS (6.7 0.9 vs. 4.6 0.5 ng/mL). Inhibin B had a statistically
significant direct correlation with levels of MIS (r 0.351). However, MIS, but not inhibin B, had a statistically
significant positive correlation with ovarian size (r 0.350); the reproductive hormones LH, T, A, and E2; and
insulin (r 0.249), independent of body mass index. Women with PCOS with the highest levels of MIS had
higher ovarian volumes and values of LH, T, A, and insulin.
Conclusion(s): Measurements of MIS reflect ovarian findings in PCOS better than levels of inhibin B and are
more frequently elevated. However, MIS lacks sensitivity for use as a diagnostic tool in PCOS. (Fertil Steril
2005;84:1685–8. ©2005 by American Society for Reproductive Medicine.
Insulin resistance in postmenopausal women with metabolic syndrome and the measurements of adiponectin, leptin, resistin and ghrelin
No full textObjective: Metabolic syndrome (MBS) is a significant health care problem in postmenopausal
women and is driven largely by obesity. We wished to assess the prevalence of insulin resistance
(IR), diagnosed using practical methods, and whether several adipocyte factors (adiponectin,
leptin, resistin) or the gastric peptide ghrelin, associated with cardiovascular risk, might be
abnormal and may relate to IR.
Study design: We evaluated 37 obese postmenopausal women with MBS and 34 matched obese
premenopausal controls, as well as 14 non-obese premenopausal controls. We measured fasting
glucose and insulin, performed 75g 2 hr oral glucose tolerance and intravenous insulin tolerance
tests to assess IR, and measured fasting lipids, adiponectin, leptin, resistin and ghrelin.
Results: The kinetic decline in glucose after insulin (kITT) as a marker of IR was the most
frequently abnormal test (abnormal in 81%), with QUICKI, HOMA, and a modification of the
Matsuda-DeFronzo index (ISIM) abnormal in 76, 73, and 68%, respectively. The GIR was
abnormal in only 35% of subjects. Leptin and resistin were elevated and adiponectin and ghrelin
were decreased in the postmenopausal women, compared to both groups of premenopausal
controls. BMI correlated strongly with markers of insulin resistance as well as adipocytokine
values. After controlling for BMI, only leptin was predictive of ISIM.
Conclusion: Being overweight after menopause results in worsening IR and elevations in
adipocytokine levels. While BMI is the most important factor, abnormal adipocytokine secretion
may enhance IR and increase cardiovascular risk in postmenopausal women.
2006 Mosby, Inc. All rights reserved
Insulin resistance in postmenopausal women with metabolic syndrome and the measurements of adiponectin, leptin, resistin, and ghrelin
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