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
Temporal and Seasonal Variation of Predator Visitation to Exclosed Piping Plover (Charadrius melodus) Nests at Jones Beach State Park, New York
Get PDFSignificant resources have been spent attempting to manage predators of the threatened piping plover (Charadrius melodus). Various nest predator species are active throughout the day and night while monitoring staff that might deter predators are usually present only during select hours of the day. Monitoring efforts are also uniform throughout the nesting season, while predator activity may not be. The purpose of this study was to identify potential critical periods throughout the 24-hr cycle and the breeding season of the piping plover to allow for more targeted allocation of resources for monitoring nest predators. Camera traps were installed near exclosed piping plover nests (N= 16) at Jones Beach State Park, New York during egg incubation. Potential nest predators were identified from camera observations, and visit frequencies were summarized by time and seasonal period. Red fox (n=12) were most prevalent from 03:00-06:00, while raccoon (n=8) visited primarily between 00:00-03:00. Avian predators (n= 39) including gulls, crows, and American oystercatcher visited nests mainly from 06:00-18:00. Visit frequency of mammals and oystercatcher did not vary seasonally, however, crows (n=13) only visited between 14 June and 5 July. Visitation amongst the different predator species had limited temporal overlap, with peak visitation times coinciding only for diurnal species. The mid-evening hours (21:00-23:59) had the lowest number of recorded predator visits. Major predator species often vary between sites, nonetheless, management activities during the breeding season may be optimized by incorporating the activity windows of their respective predator suite in their piping plover monitoring schedules
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
Abundance and Diversity of Macrofungi in Ranomafana National Park, Madagascar.
No full textFungi are a vital part of most ecosystems. In general the habitat requirements of fungi are poorly known. With habitat degradation happening at an unprecedented rate worldwide, studying the patterns of fungi biodiversity is essential to ascertain what regions may be conservation priorities. The aim of this study was to evaluate potential differences in fungal diversity and abundance between primary and selectively logged rainforests in Ranomafana National Park, Madagascar. Sixteen 5 m x 5 m plots in each forest type were searched thoroughly for macrofungi and specimens were identified down to morphological group. The morphological group diversity (Shannon Index) and abundance of macrofungi were calculated for each plot. In total, 10 distinct morphological groups were found in Ranomafana. The primary forest had a significantly higher abundance of macrofungi (830) as compared to the forest selectively logged two decades previously. (462). However, this contrasts could be the result of differing weather conditions during sampling. There was no significant difference observed in macrofungi morphological group diversity between the primary and the disturbed forests and 9 of the 10 morphological groups were ubiquitous across both forests. While additional long term sampling is needed to more precisely assess the macrofungi biodiversity patterns of Ranomafana National Park, this research suggests that both the primary and selectively logged forest are viable habitat for macrofungi, and have the abiotic and biotic conditions necessary to support a high level of fungi diversity. Future research might include additional controlled experiments focusing on the causal and correlative factors influencing diversity of macrofungi in this rainforest ecosystem within Madagascar.SUNY BrockportSUNY Undergraduate Research Conferenc
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
Abundance and Diversity of Macrofungi in Ranomafana National Park, Madagascar.
Get PDFFungi are a vital part of most ecosystems. In general the habitat requirements of fungi are poorly known. With habitat degradation happening at an unprecedented rate worldwide, studying the patterns of fungi biodiversity is essential to ascertain what regions may be conservation priorities. The aim of this study was to evaluate potential differences in fungal diversity and abundance between primary and selectively logged rainforests in Ranomafana National Park, Madagascar. Sixteen 5 m x 5 m plots in each forest type were searched thoroughly for macrofungi and specimens were identified down to morphological group. The morphological group diversity (Shannon Index) and abundance of macrofungi were calculated for each plot. In total, 10 distinct morphological groups were found in Ranomafana. The primary forest had a significantly higher abundance of macrofungi (830) as compared to the forest selectively logged two decades previously. (462). However, this contrasts could be the result of differing weather conditions during sampling. There was no significant difference observed in macrofungi morphological group diversity between the primary and the disturbed forests and 9 of the 10 morphological groups were ubiquitous across both forests. While additional long term sampling is needed to more precisely assess the macrofungi biodiversity patterns of Ranomafana National Park, this research suggests that both the primary and selectively logged forest are viable habitat for macrofungi, and have the abiotic and biotic conditions necessary to support a high level of fungi diversity. Future research might include additional controlled experiments focusing on the causal and correlative factors influencing diversity of macrofungi in this rainforest ecosystem within Madagascar
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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