1,721,022 research outputs found
Replication data for: The Impact of Open Access Mandates on Invention
No full textBryan, Kevin A., and Ozcan, Yasin, (2021) “The Impact of Open Access Mandates on Invention.” Review of Economics and Statistics 103:5, 954–967
Replication data for: Entrepreneurial Migration
No full textReplication Dataset for.
Bryan, Kevin, and Jorge Guzman. "Entrepreneurial Migration" The Review of Economics and Statistic
In-Text Patent Citation Database Bryan/Ozcan/Sampat Beta version .9
No full textMatched patents and in-text scientific article
In-Text Patent Citation Database Bryan/Ozcan/Sampat Beta version .9
No full textMatched patents and in-text scientific article
The response of carabid and staphylinid beetles to patches of their cereal aphid prey
No full textField studies were carried out in each of 1982, 1983 and 1984 to determine how polyphagous beetles respond to patches of cereal aphids in winter wheat. In each year discrete (4 m2 or c. 0.77 m2) patches of aphids were created by the infestation of wheat within field cages. The numbers of polyphagous beetles in these patch areas and in uninfested, previously uncaged, control areas were determined by either pitfall trapping or absolute sampling. These comparisons were made only after the cages over the patch areas had been removed. The beetles were sexed and the carabids dissected for the presence/absence of aphid remains. Experiments were carried out to determine the effects of between-patch variations in aphid density and patch size on the patch/control response. Many species of carabid and staphylinid showed significant patch-responses, i.e. were captured/collected in significantly larger numbers in the patch areas. However, no species showed a patch-response on all occasions when patch-control comparisons were made. Species were grouped according to their degree of responsiveness. The main patch-responding carabids were Agonum dorsale, Bembidion lampros and Bembidion obtusum. The main patch-responding staphylinids were Philonthus cognatus, Tachyporus chrysomelinus, Tachyporus hyporum and Tachyporus obtusus. The number of patch-responding species (carabids and staphylinids combined) was higher for the early-season sampling period than for the late periods. On most occasions the incidence of aphid feeding by the main patch-responding carabids was significantly higher in the patch areas than the controls. The consequences of these results for the development of an integrated pest management strategy for aphids in cereals are discussed as are the broader ecological implications. (D80129/88)</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
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
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