1,721,160 research outputs found
Invertebrate diversity and composition on fragmented heathland
No full textInvertebrates faunas sampled from mature dry Calluna heathland at 25 sites in the Poole Basin, Dorset, which differed in their areas and the extent to which they were isolated from other heathland. The relations between the diversities or the Aransas and of the Coleoptera faunas and sits area, isolation and vegetation were examined. For the Coleoptera, diversity decreased with increasing site area end with decreasing Isolation. For the Araneae there was no relation between diversity and site area or isolation, but for 60 species of Aransas known to be loyal to heathland diversity weakly increased with increasing site area. Variables describing the vegetation or the sites wore also correlated with site area and isolation, end were often equally successful in explaining variation in Araneae and Coleoptera diversities. Variation in the composition of the Araneae and Coleoptera faunas was investigated using ordination and clustering techniques. Variation could not be reduced to a few dimensions without severe loss of information, but the first axis of each ordination was correlated with site area. For the 60 species or heathland-loyal Araneae there was some evidence that the species which tended to be more abundant on large sites than on small had poorer dispersal abilities than those more equally represented on large and small sites. Variation in the composition of the Aransas and Coleoptera faunas appeared to be continuous, with no clustering of the sites based on species composition. The Araneae faunas of 5 of the 25 sites were sampled more intensively and evidence was sought for competition between Aransas species by examining their distributions in time and space and their morphological similarities. A method to detect interactions between spatially dynamic populations was described and illustrated using the Araneae fauna. The implications of a dynamic model of competitive interactions were discussed. The implications of the results of the thesis for the conservation of heathland invertebrate faunas were discussed.</p
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Muslim youth in Scotland: Politics, identity and multicultural citizenship
Full text linkNo abstract available
Variations on the Author
Full text link“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
Full text linkWe 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
Full text linkWe 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
Masculinities and place
No full textIntroduction: This book provides an insightful collection of critical work on the intersection of masculinities and place, delving into and explicating the ways in which masculinities are constituted and contested in diverse geographical contexts at a range of scales. The seven thematic parts highlight some of the key developments in research on masculinities and place over the last decade
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