1,720,962 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
Population genetics and otolith strontium/calcium ratios analysis of marble goby Oxyeleotris marmoratus in Southeast Asia for aquaculture application
Get PDF The marble goby Oxyeleotris marmoratus belongs to the suborder Gobioidei in the order Perciformes. It has partial flattened body with snake-like head, symmetrical patternihg on the dorsal surface and rounded, outstretched round pectoral fin, two dorsal fins, rounded caudal fin and separated pelvic fins. It is a popular freshwater fish in Southeast Asia for its fine texture and delicious taste. In the wild, it feeds on small fish, shrimp, molluscs and crustaceans. It can grow to a maximum size of approximately 65 cm standard length. Fish farmers would like to culture the marble goby, but the seed supply is still mainly dependent on natural sources. In 2008, the seed production of marble goby has been succeeded in Sabah of East Malaysia. Although it is a freshwater fish, 10 psu diluted seawater is the best for the larval survival of marble goby in Sabah. It showed the possibility of different populations is existed in Southeast Asia. Thus, three experiments were conducted to better understanding of its population structure and early life history in salinity in nature would aid more effective broodstock management in the hatchery for seed production.application/pdfdepartmental bulletin pape
Population genetics and otolith strontium/calcium ratios analysis of marble goby Oxyeleotris marmoratus in Southeast Asia for aquaculture application
No full textEgg collection and biotelemetry studies of tiger grouper, Epinephelus fuscoguttatus in broodstock tank
Get PDFThis study was performed to get basic knowledge of egg collection in tiger grouper, Epinephelus fuscoguttatus through natural spawning in a 150-ton broodstock tank. The chosen 18 E. fuscoguttatus were transferred from the net cage into the broodstock tank. Water quality (temperature, dissolved oxygen, pH and salinity) was measured twice per day and the E. fuscoguttatus were fed with trash fish. An egg net was set up in the broodstock tank to collect the eggs of E. fuscoguttatus every month. Biotelemetry experiment on E. fuscoguttatus was conducted to measure the depth where the fish stayed in the broodstock tank and the fish body temperature to understand their behaviour during spawning. Data loggers were able to record the water depth and the temperature at 2-minute intervals continuously for 30 days. Data loggers were inserted into the abdomen of a female and a male. Approximately 105 million eggs were collected from July 2004 until October 2004. Spawning occurred in July (46 million eggs), August (24 million eggs) and October (35 million eggs) 2004. The biggest egg diameter (0.880 mm) with the highest fertilization rate (95.2%) was considered the best egg quality among the 3 spawnings. The fertilization rate of this study was considerably higher than other studies, which seemed to be because of the water depth of the broodstock tank. In each spawning period, E. fuscoguttatus spawned for 5-6 consecutive nights in the broodstock tank. The spawning occurred at midnight (11pm-1am). On the other hand, from the water parameter results, spawning could occur at 27.4 °C ± 1.1°C (mean ± SD), dissolved oxygen 6.26 mg/L ± 0.41 mg/L, salinity 31.4 ppt ± 0.9 ppt and pH 7.88 ± pH 0.19. On average, the females swam to the water surface between 1.2 times/night and 3.8 times/night during the spawning periods. However, it was only 0.6 times/night during the non-spawning periods. The results of the data logger show E. fuscoguttatus spawned at the water surface with an extreme changes of body temperature. From this study, the 150-ton broodstock tank with 3m depth is suitable for the egg collection of E. fuscoguttatus through natural spawning. This broodstock tank system and management, such as the water temperature 24.4-31.7 °C, the salinity 30-33 ppt, the DO 5.03-6.97 mg/L, the pH 7.32-8.37 and the mean of feeding rate 1.8%, can be recommended as a guideline to other hatcheries for the constant collection of E. fuscoguttatus eggs. The data logger is introduced as a new tool to improve the understanding on fish behaviour, in order to develop the aquaculture in Malaysia
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
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