1,720,996 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
Protein Structure-Based Design of Novel Semisynthetic Metallotrypsin
Get PDFA detailed study of the surface region trypsin from bovine pancreas was performed to gain insight into its biological functions and interactions that helped to determine the binding specificity. Twenty four pockets were identified in trypsin from Protein Data Bank (PDB) file entry 1AUJ using Computed Atlas of Surface Topography of proteins (CASTp). Nevertheless, only five biggest pocket cavities were selected; pocket 20, 21, 22, 23, and 24 since those pocket cavities would provide insight of location where ligand could bind as well as to identify the cavities that can aid in diffusion of the ligands. It also offered the identification of surface features and functional region of protein. Analyses of volume, surface area, and amino acids that participated in each pocket cavity were also determined. Systematic molecular docking studies using AutoDock 3.0.5 was performed on the five largest pocket cavities in trypsin. A set of ten chemical ligands was docked onto five biggest pocket cavities. The results showed that the biggest rigid ligand 1,10-phenanthroline (PHN) preferred to bind at pocket 24 as indicated by the lowest docked energy value (-8.74 kcal/mol). Systematic analyses on molecular docking for various metal ions such as Fe2+, Mg2+, Ca2+, and Zn2+ to the protein ligand complex showed almost similar docked energy at all pocket cavities. Docking results of trypsin-PHN complex showed that the lowest docked energy of -9.63 kcal/mol for Fe2+ at pocket cavity 21, followed by Mg2+ (-7.00 kcal/mol) at pocket 23, Ca2+ (-5.56 kcal/mol) and the highest docked energy value that was Zn2+ with -0.02 kcal/mol at the pocket cavity 21. Experimental studies have focused on PHN as an intermediate ligand since PHN was a bidentate ligand that provides more sites for interactions which capable of generating stable complex. It was found that at concentration 100 μM of PHN increased the activity of trypsin by 40 % higher than native trypsin. However, analysis among the metal ions on trypsin-PHN complex indicated that Ca2+ was the only metal ions capable of enhancing the activity of trypsin about 10 % than native trypsin at the concentration of 5 μM
Evaluation of Post Harvest Technologies for Improving Strawberry Fruit Quality
Get PDFFragaria ananassa, generally known as strawberry is a nutritious fruit that is rich in polyphenols and widely consumed as part of a healthy diet. Anthocyanins have been found to be the main group of phenolic components present in strawberry with pelargonidin-3-glucoside as the major component in all strawberry cultivars studied. The main volatile component has been identified as caryophyllene oxide, a sesquiterpene compound that was present abundantly in all cultivars. The effect of preharvest spray applications of a formulation containing hexanal which is known to enhance membrane preservation, was evaluated using two strawberry cultivars, ‘Jewel’ and ‘Mira’. Our results suggest that preharvest spray application of hexanal formulation results in biochemical changes that alter the profile of phenolic compounds and the volatiles of the fruit. An osmotic infusion treatment was implemented to generate an intermediate moisture food product with high quality and enhanced storage life that can be potentially used in processed food. Infusing strawberry with other functional ingredients such as fructoligosaccharides, lecithin, and ascorbic acid showed that the infused strawberry produced by this technique was structurally and organoleptically similar to fresh strawberry, and visually similar to the intial fruits. Drying of infused fruits could extend their shelf life up to several months, while providing fruit products with superior nutritional qualities. Subjecting strawberry fruit extract to a simulated in vitro digestion of strawberry greatly affected the polyphenol composition and concentrations during different stages of digestion. The concentrations of most polyphenols increased during gastric digestion suggesting that the acidic environment of the stomach may help to release polyphenols that are bound to the strawberry matrix. Following incubation of the IN and the OUT fractions with colonic bacteria, the presence of urolithin B glucunoride in the IN fraction and the increase of ellagic acid deoxyhexoside in both the IN and OUT fractions after fermentation process, suggest that the polyphenols are catabolized into simple phenolic compounds in the colon. The remaining polyphenols as well as the catabolites in the gut, could potentially have a beneficial effect in enhancing colonial health.Ministry of Higher Education MalaysiaUniversiti Putra Malaysi
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
