1,720,955 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
An Assessment of the Effectiveness of Drinking Water Purification Systems Used in a CKDu Prone Area: A Case Study from Madawachchiya
Get PDFChronic Kidney Disease of unknown aetiology (CKDu) has become a severe health problem in Sri Lanka during the last three decades. Madawachchiya is one of the high CKDu prevalent areas in North Central Province of Sri Lanka. Due to lack of safe drinking water, people have to use water purification systems (WPS) at both household and community levels. However, the efficiency of different WPS used by the community is not well documented, therefore, as a case study, this investigation aimed to assess the efficiencies of WPS available in Madawachchiya area. A social survey was conducted initially to collect primary data on sources of drinking water, methods and usage of WPS, from randomly selected 50 houses. Sampling sites for measuring water quality were selected on the basis of available type of WPS which having same age, volume capacity that can be treated. Water samples were collected from both inputs and outputs of selected WPS weekly for a period of six weeks. In situ measurements were taken for temperature, pH, total dissolved solids (TDS) and conductivity of water. Alkalinity, hardness, fluoride, cadmium and arsenic concentrations were measured in the laboratory following standard methods. Results indicated that 12% of houses used household filter systems, and the rest of the houses fulfilled their drinking water requirements by using community level WPS. There were five types of commercially available WPS with different technologies. The ground water source of selected area had comparatively higher pH, hardness, alkalinity, fluoride and TDS than the desirable levels accepted in Sri Lanka. There were different removal efficiencies for each water quality parameter for different WPS (p<0.05). Those efficiencies significantly varied within the same WPS with time. Filter systems with low-improved technologies have lower efficiencies compared to the others. WPS with improved technologies also were unable to produce desired drinking water standards. Therefore, it is recommended to introduce WPS devices, which are able to produce safe drinking water, to people in CKDu affected areas like Madawachchiya.Keywords: Chronic Kidney Disease (CKDu), Water purification systems, Purification efficienc
Assessing the Potential of QBR Index in Predicting Instream Habitat Quality; A Comparison with Macrobenthos Diversity Indices in Wathurawa Stream, Deniyaya, Sri Lanka
No full textMost riparian ecosystems have been degraded due to human activities such as removing forests for cultivation in Sri Lanka. Therefore, effective management is urgently needed with reliable and rapid assessment methods. Macrobenthos diversity is a widely used, reliable instream habitat quality assessment tool that is labor and time-consuming. The QBR index is a rapid riparian habitat quality assessment tool but hardly any record in the Sri Lankan context. Hence, the present study aimed to assess the applicability of the QBR index to evaluate the instream habitat quality in the Wathurawa stream, Deniyaya, and macrobenthos diversity as a reference. Five sampling sites were selected starting from the less disturbed forest reserve (S1). The remaining sites (S2-S5) were in the deforested area for tea and paddy cultivation. Macrobenthos were sampled and the QBR score was recorded with key water quality parameters such as Dissolved Oxygen, pH, Electrical conductivity, TDS, and Temperature at each sampling site. The Shannon-Weiner diversity index and EPT index were used as a measure of habitat quality across five sampling sites with different levels of riparian disturbance. pH and Temperature were not significantly different among the sampling sites while Conductivity, TDS, and DO significantly differ between S1 and S5 (p<0.01). The QBR index was strongly correlated to macrobenthos diversity (r = 0.91, p<0.05). More sensitive taxa, such as Ephemeroptera, Trichoptera, and Plecoptera, were abundant in the less-disturbed areas where the QBR index was high (QBR index; 78.9±8.6). The poorest QBR index (20.0±6.5) was observed at highly degraded riparian area (S5) where the macrobenthos diversity and EPT index were the lowest. The results showed that the QBR index is a valuable indicator for rapid habitat assessment. Sites in poorer QBR showed lower species richness and were dominated by pollution-tolerant species, whereas sites with high QBR index showed healthier and more diverse communities. These results suggest that the inclusion of the QBR index as a rapid assessment tool into conservation methodologies could further enhance habitat monitoring and assist in prioritization within riparian ecosystems.
Keywords: Diversity index, Deforestation, QBR index, Habitat quality, Sensitive tax
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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