1,720,985 research outputs found
Vegetation evolution on the central Chinese Loess Plateau since late Quaternary evidenced by elemental carbon isotopic composition
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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
Apparent ages of suspended sediment and soil erosion of the Pearl River (Zhujiang) drainage basin
No full textThe carbon isotopic composition (Delta(14)C, delta(13)C) and apparent ages of suspended sediment were determined in the Pearl River in the years 1998, 2000 and 2005. These results indicate that suspended POC consists mostly of young carbon and some "old carbon". Apparent ages of suspended POC range from 540 to 2050 a BP. The apparent ages are older in the Xijiang and Beijiang Rivers, while these values are variable in the Dongjiang River, including old and young samples. The suspended POC delta(13)C values increase with increasing Delta(14)C in the Pearl River, indicating that its source is soil and bedrock from depths under 15-30 cm. Since the organic carbon of the surface soil is quickly decomposed when it enters the rivers, its carbon isotopic characteristics are insignificant in suspended sediment. In the Pearl River drainage basin, there are areas with more severe soil erosion than others. For example, erosion is much more severe in the Xijiang River drainage basin when compared to the light soil erosion in the Dong-jiang River drainage basin.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000278704100012&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Multidisciplinary SciencesSCI(E)2ARTICLE151547-15535
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
Concentration and seasonal variation of Be-10 in surface aerosols of Lhasa, Tibet
No full textThirty samples of total suspended particles were collected at a site in western part of Lhasa, Tibet from August 2006 to July 2007. The Be-10 concentrations were determined by Accelerator Mass Spectrometer (AMS). Analysis of correlation between Be-10 concentrations and meteorological factors revealed that the wet scavenging has little effect on Be-10. Be-10 can be used as a proxy of transport processes of the upper atmosphere over the Tibetan Plateau. Analysis of correlation between Be-10 concentrations and NCEP reanalysis data demonstrated that higher Be-10 concentrations in spring were probably caused by the atmosphere exchange from stratosphere to troposphere during February to June. Lower Be-10 concentrations during August to September were consistent with the synchronous lower O-3 values, suggestive of both Be-10 and O-3 were probably influenced by the atmosphere exchange from troposphere to stratosphere.Multidisciplinary SciencesSCI(E)0ARTICLE232572-25785
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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