1,721,421 research outputs found
β-diversity of deep-sea holothurians and asteroids along a bathymetric gradient (NE Atlantic)
Full text linkMeasuring and understanding patterns of ?-diversity remain major challenges in community ecology. Recently, ?-diversity has been shown to consist of 2 distinct components: (1) spatial turnover and (2) species loss leading to nestedness. Both components structure deep-sea macrofaunal assemblages but vary in importance among taxa and ocean basins and with energy availability. Here, we present the first evidence for turnover and nestedness along a bathymetric gradient in 2 major megafaunal taxa, holothurians and asteroids. Turnover is the dominant component of ?-diversity throughout bathyal and abyssal zones in both taxa, despite major differences in ?-diversity and trophic composition. High spatial turnover suggests a role for evolutionary adaptation to environmental circumstances within depth bands. This pattern differs fundamentally from those in some macrofaunal groups in low-energy environments where abyssal nestedness is high and diversity low, with diversity maintained partly by source-sink dynamics
Type II Endoleak after Endovascular Aneurysm Repair: natural history and treatment outcomes
Full text linkPublished online April 2017Abstract not availableLiana Kumar, Prue Cowled, Margaret Boult, Stuart Howell, and Robert Fitridg
The irritable bowel syndrome and psychiatric disorders in the community: is there a link?
No full textAbstract not availableNicholas J. Talley, Stuart Howell, and Richie Poulto
Significant increase in thrombolysis therapy rates for stroke in South Australia
No full textAndrew W. O. Moey, Monica A. Hamilton-Bruce, Stuart Howell, James M. Leyden, Woon K. Chong, Lizzie Dodd, Austin G. Milton, Simon A. Koblar, Timothy J. Kleinig, Andrew W. Lee, and Jim Janne
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
The clinical burden and predictors of sequelae following invasive meningococcal disease in Australian children
No full textOf 109 children admitted to a tertiary paediatric hospital with a diagnosis of invasive meningococcal disease from 2000-2011, 37.6% (n = 41) developed sequelae; for serogroup B, 41.3% developed sequelae. Independent predictors of sequelae included: fever ≥ 39 °C on hospital presentation [odds ratio (OR): 4.5; P = 0.012] and a diagnosis of septicemia with meningitis compared with septicemia alone (OR: 15.5; P < 0.001) and meningitis alone (OR: 7.8; P = 0.002).Bing Wang, Michelle Clarke, Natalie Thomas, Stuart Howell, Hossein Haji Ali Afzali, Helen Marshal
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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