1,720,979 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
Physiological Response of Sugar Beet Seedlings to Ferrous, Hypoxia, and Interactive Ferrous-Hypoxia Stresses
No full textCrops during their growth period can encounter waterlogging problems which often lead to an oxygen-deficient environment in the rhizosphere and rapid increases in the availability of iron in the soil. Therefore, a hydroponic experimental system was designed to evaluate the response mechanism of sugar beet to single ferrous, hypoxia stress, and interactive ferrous-hypoxia stress through physiological and biochemical analyses. In this study, stress conditions were applied in a factorial design: three ferrous treatments (0.06, 0.48, and 1.92 mmol) and three hypoxia treatments (normal, 4-day hypoxia, and 8-day hypoxia) were set against one another, totaling 9 experimental treatments. We measured morphological indexes, biomass production, root vigor, the electrolytic leakage, chlorophyll content, gas exchange, reactive oxygen species concentration, malonaldehyde concentration, antioxidant enzyme activity, proline, soluble sugar concentration, and plant nutrient contents of sugar beet seedlings under different treatments. Under single stress, the growth of seedlings was inhibited, and interactive stress enhanced this inhibition. Compared to the control, 1.92 mmol Fe and 8 days of hypoxia induced a 16% and 43% reduction in the total plant height of seedlings, respectively, while interactive ferrous-hypoxia stress produced a 51% reduction. Single and interactive stress damaged the roots of seedlings, root vigor reached its lowest under interactive stress, and Fe concentrations increased, but N, P, K, Mn, and Zn decreased. Chlorophyll content decreased under ferrous and interactive stress. At the same time, stresses affected the gas exchange of leaves, and the stomatal conductance, transpiration rate, and intrinsic water use efficiency decreased, resulting in insufficient photosynthetic capacity of the seedlings, and biomass accumulation decreased. Furthermore, the antioxidant enzyme activity and osmotic adjustment substance content of seedlings increased with an increase of the degree of stress. Among these, the POD activity of seedlings grown under 1.92 mmol Fe and hypoxia for 8 days was upregulated by 7.5 and 1.5 times compared with the control, while the interactive stress induced a 10.5 times upregulation. Under single stress, seedling growth was inhibited to varying degrees, while under interactive stress, this inhibition was enhanced. Seedlings also improved their antioxidant capacity to resist the damage caused by stress, but on the whole, stress had a profound effect on the plants
Nitrone-Modified Gold Nanoparticles: Synthesis, Characterization, and Their Potential as F-18-Labeled Positron Emission Tomography Probes via I-SPANC
Full text linkA novel bioorthogonal gold nanoparticle (AuNP) template displaying interfacial nitrone functional groups for bioorthogonal interfacial strain-promoted alkyne-nitrone cycloaddition reactions has been synthesized. These nitrone-AuNPs were characterized in detail using H-1 nuclear magnetic resonance spectroscopy, transmission electron microscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy, and a nanoparticle raw formula was calculated. The ability to control the conjugation of molecules of interest at the molecular level onto the nitrone-AuNP template allowed us to create a novel methodology for the synthesis of AuNP-based radiolabeled probes
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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