1,720,968 research outputs found
Effects of CCA Wood Docks and Resulting Boats on Bioaccumulation of Contaminants in Shellfish Resources: Final Report to DEP
No full textThis is the report of a study which was performed because of concern that leachate from docks made of chromated copper arsenate (CCA) wood could cause unacceptable levels of sediment contamination and also contamination of shellfish beds in the vicinity. There was also concern that the resulting motor boat activity might cause PAH contamination of nearby sediments and shellfish. Therefore, the authors examined sediments and bivalves in the Navesink-Shrewsbury Rivers system in relation to the distance from CCA-docks, the hydrographic regime, and to the boating season. Collections of sediments and bivalves were made in the four selected sites in October 1995, May 1996, and August 1996. At each site, four stations covering 0-10 meters plus a distant reference station were sampled. Only the hard clam was found consistently at all sites and station. Sediments and clam tissues were processed for Cu, Cr, and As analysis. Sediments were also characterized for physical characteristics and for organic carbon.Purpose: To examine leachate contamination of sediment and shellfish beds in the Navesink-Shrewsbury Rivers system from docks made of CCA woods
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
Invading new environments: a mechanistic framework linking motor diversity and cognition to establishment success
No full textTo invade a new environment and become established all animals need to solve the same set of problems: First, they need to detect new resources and investigate them. Second, they need to develop the skills to exploit them and, third, store adequate information to be able to identify and handle them in the future. Fourth, they need to detect new predators and avoid them. Admittedly, the amplitude of these challenges will most likely vary with the degree of adaptive match between the invader and the new environment (Duncan et al., 2003; Sol, 2007). Invaders arriving from environments similar to their new surroundings benefit from their existing learned and evolutionary knowledge because the cues that signal resources in their new environment and the way new items need to be handled will bear some similarity to the cues they experienced and the skills they deployed in their original environment. The challenges are greatest for those invaders arriving from different environments because their existing knowledge will not apply to their new circumstances. But, overall, whatever their level of adaptive match, invaders confronted with unfamiliar surroundings and unfamiliar circumstances all face these problems to some extent. The question we address here is which behavioural and cognitive mechanisms assist alien animals in solving these challenges
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
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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