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
Effects of exogenous polyamine and ultrasound treatment to improve peach storability
Get PDFPeach ( Prunus persica [L.] Batsch) is a perishable product and its
storage period may be extended by using different postharvest methods.
For this purpose, peaches harvested at the commercial ripening stage
were treated with individual and combined effects of putrescine (1 mM)
and ultrasonic treatment (32 kHz for 10 min); postharvest storage
quality of peach fruit was evaluated during storage at 0-1 °C for
28 d. Quality characteristics such as weight loss, fruit firmness,
respiration rate, total sugar, total soluble solid content, titratable
acidity, chilling injury, and decay rate were determined at the
beginning and during the storage period at 1-wk intervals. The result
showed that individual and combined effects of putrescine and
ultrasonic treatment, when compared to control fruits, could increase
peach fruit postharvest life by inducing resistance to different
diseases and chilling injury with no noticeable effect on fruit quality
attributes such as weight loss, total soluble solids, and total sugar.
At the same time, a combined putrescine and ultrasound treatment was
found to be more effective than other treatments in decreasing
respiration rate and maintaining firmness and acidity. Peach
storability could be extended with a combined putrescine and ultrasound
treatment because it delays the ripening processes
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
Impact of Chitosan-Melatonin Composite Coating on Postharvest Quality of Sweet Cherry
No full textThe current research was conducted to test the effects of chitosan coatings enriched with melatonin on the storability of sweet cherry 'Sweetheart' fruit. Cherries were treated with water (control), 0.5% chitosan, 1000 mu mol l(-1) melatonin, and 1000 mu mol l(-1) melatonin + 0.5% chitosan for 5 min and stored at 0-1(degrees)C with 90-95% RH for 28 days. Weight loss, respiration rate, firmness, total soluble solids, titratable acidity, ascorbic acid, total anthocyanin, total phenolic, antioxidant content, decay incidence, and sensory quality were investigated weekly during storage. The results showed that the chitosan and melatonin + chitosan coatings could reduce both weight loss and respiration rate compared to uncoated fruits. Among treatments, chitosan coating enriched with melatonin significantly delayed the reduction of total soluble solids and firmness and kept higher biochemical content. Moreover, the addition of melatonin to the chitosan coating improved the antifungal effect of the formulation and improved sensory quality during storage. Consequently, the use of chitosan coating enriched with melatonin was an effective postharvest treatment to maintain the overall quality of sweet cherry fruits during storage
Effects of exogenous polyamine and ultrasound treatment to improve peach storability
Get PDFPeach ( Prunus persica [L.] Batsch) is a perishable product and its
storage period may be extended by using different postharvest methods.
For this purpose, peaches harvested at the commercial ripening stage
were treated with individual and combined effects of putrescine (1 mM)
and ultrasonic treatment (32 kHz for 10 min); postharvest storage
quality of peach fruit was evaluated during storage at 0-1 °C for
28 d. Quality characteristics such as weight loss, fruit firmness,
respiration rate, total sugar, total soluble solid content, titratable
acidity, chilling injury, and decay rate were determined at the
beginning and during the storage period at 1-wk intervals. The result
showed that individual and combined effects of putrescine and
ultrasonic treatment, when compared to control fruits, could increase
peach fruit postharvest life by inducing resistance to different
diseases and chilling injury with no noticeable effect on fruit quality
attributes such as weight loss, total soluble solids, and total sugar.
At the same time, a combined putrescine and ultrasound treatment was
found to be more effective than other treatments in decreasing
respiration rate and maintaining firmness and acidity. Peach
storability could be extended with a combined putrescine and ultrasound
treatment because it delays the ripening processes
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