1,720,958 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
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
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
Investigating the Factors That Lead to Sports Related Injuries in Children
Get PDFThis project’s focus is to investigate if playing contact versus non-contact sports at a young age leads to more sports related injuries and to identify which factors correlate with increased injury rate in order to develop the most effective prevention and treatment methods. Data was collected through a survey including questions that delve deeper to quantify the amount of strain being put on the youth athlete’s body such as hours played a week, level of competitiveness, weeks played in a year, contact versus non-contact sport, and number of sports played. The following set of questions then addressed the actual injury by considering which sport caused it, the location of the injury, length of recovery, recovery methods, and if reinjury occurred. Prior research states that even though exercise has positive implications on health, youth athletes have a greater prevalence of sports injury specifically musculoskeletal injuries since they are still developing. In conclusion, males experienced a greater number of injuries during a contact sport, while females experienced a greater number of injuries during a non-contact sport. Overall, an increase in the number of seasons played in a year and number of training sessions per week resulted in more injuries. In the future, it would be ideal if this data could help create guidelines for training youth athletes to prevent injuries by raising awareness of which factors lead to a significant increase in injuries
Characterization of Human dUTPase
Get PDFDeoxyuridine nucleotidyl transferase (dUTPase) is an enzyme found in all organisms that have thymine as a component of DNA. It catalyzes the hydrolysis of dUTP to dUMP and pyrophosphate thus precluding the buildup of dUTP pools as well as providing the substrate, dUMP, for the de novo synthesis of thymidylate. In Homo sapiens, there are four isoforms: mitochondrial (mDut), nuclear (nDut), variant 3 and variant 4. This work is largely focused on nDut. Using structural and MS analyses of recombinant dUTPase constructs, an intermolecular disulfide bridge between cysteine-3 of each nDut monomer was discovered. It was found that these two residues stabilize a dimer configuration that is unique to the nDut isoform. It was also uncovered that there is an intramolecular disulfide linkage between cysteine residues C-78 and C-134, stabilizing the monomeric state of the protein. Both disulfide linkages are essential for nDut’s enzymatic activity and the dimeric form can be augmented by the addition of the oxidizing agent, hydrogen peroxide. It was observed that mDut appears to be a mixture of monomer, dimer, and trimer conformations, as well as higher-order subunit interactions. In contrast, nDut appeared to exist only in monomeric and dimeric forms.
Cysteine-based redox “switches” have recently emerged as a distinct class of post-translational modifications that have been shown to influence subcellular location, turnover rate, and catalytic activity of many enzymes. Taking this work as a whole we propose that nDut possesses a redox switch that regulates nDut’s dUTP- hydrolyzing activity.
Moreover, in recent years dUTPase in multiple organisms has been implicated to be involved in a secondary function outside of hydrolysis of dUTP. With the discovery of the two additional human isoforms, this work has laid the foundation to begin to elucidate their function. This is the first report of a viable mammalian dUTPase knockout cell lines. The work presented here validates this line as a useful tool for the individual analysis to evaluate the contributions of each of the four human dUTPase isoforms
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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