1,720,956 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
INVESTIGATING THE RELATIONSHIP BETWEEN SERUM LEPTIN LEVELS AND C-REACTIVE PROTEIN IN POLY CYSTIC OVARY SYNDROME (PCOS) PATIENTS
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Objective: Despite the using of some biological and clinical criteria for definition of Polycystic ovarian syndrome, such as hyperandrogenism and menstrual dysfunction. However, the complex mechanism of this syndrome is still of interest to researchers, and began to investigate new parameters intervene in the pathogenesis of this disease, including leptin and C-reactive protein (CRP). However, the role of these parameters are still not clear and under controversy. This study, aimed to investigate the relationship between serum leptin levels with C-reactive protein in patients diagnosed with polycystic ovarian syndrome attending Aleppo gynecology university hospital.
Methods: The study includes 46 patients and 25 healthy control subjects with the same range of age- and body mass index. Related parameters were measured for both groups: serum glucose, leptin, insulin and C-reactive protein levels, and homeostasis model assessment of insulin resistance (HOMA-IR).
Results: Serum leptin levels were significantly correlated with C-reactive protein only in Polycystic ovarian syndrome group (p<0.05). The levels of C-reactive protein and leptin were significantly higher in the Polycystic ovarian syndrome group in comparison with the control group (p<0.05). There were a correlation between leptin with C-reactive protein only in patients with insulin resistance group (p > 0.05), and there was a correlation between C-reactive protein and HOMA-IR only in polycystic ovarian syndrome group (p> Â Â 0.001), but not in control group.
Conclusion: Increased leptin, C-reactive protein levels in polycystic ovarian syndrome patients is independently associated with insulin resistance and make these parameters more important to take them in consideration.
 Keywords: CRP, HOMA-IR, Leptin, PCOS.
 
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Insertion of the amyloid precursor protein into lipid monolayers: effects of cholesterol and apolipoprotein E
No full textInternational audienceAPP (amyloid precursor protein), together with Chol (cholesterol) and ApoE (apolipoprotein E), has been linked to Alzheimer's disease. We have examined the hypothesis that interaction of APP with the lipid membranes is modulated by Chol and ApoE. Insertion of APP into lipid monolayers was first evidenced as an increase in the surface pressure. APP injected into a subphase induced a substantial increase in the surface pressure of monolayers prepared from PC (L-α-phosphatidylcholine), Chol, SPM (sphingomyelin) and PS (L-α-phosphatidylserine), the major lipids present in the plasma membranes of brain cells. At a given initial pressure, the insertion of APP into expanded monolayers is higher than that in condensed monolayers, in the order Chol>PC>SPM>PS. The membrane insertion capacity of APP was also measured from surface pressure versus area (π–A) isotherms of APP–lipid monolayers. The increase in the mean area per molecule in protein–lipid monolayers, in the order PC>Chol>PS>SPM, provides further evidence for protein–lipid interactions. These interactions occurred at optimum salt levels and optimum pH values close to physiological conditions (150 mM NaCl and pH 7.4). In addition, ApoE4 affected the insertion of APP into lipid films. APP–ApoE complexes showed a decreased ability to penetrate lipid monolayers at a constant area. APP–ApoE complexes expanded the π–A isotherm of a Chol monolayer to a lesser extent than APP alone. These experiments demonstrate the roles of Chol and ApoE in the modulation of membrane insertion of APP
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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