1,720,965 research outputs found
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
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
The Termination of the Last Glacial Cycle in eastern Australia: A High Resolution, Multiproxy Analysis
No full textA continuous, high resolution (average ca. 22 year) record encompassing the termination of the Last Glacial Cycle (LGC) (defined here as ca. 31 – 18 kyr) has been developed using multiple proxies (viz. sediment flux, grain size, moisture content, pollen and charcoal) in lake sediment from Tortoise Lagoon (TOR), North Stradbroke Island (NSI), Queensland, Australia. This record is one of only two available from the lowland subtropics of Australia which are continuous through the termination of the LGCLGC. As such, the TOR record assists in bridging an extensive spatial gap between the records of palaeoclimatic and palaeoenvironmental variability from the tropical north and temperate south. The presence of key pollen taxa (e.g. Asteraceae (Tubuliflorae) and spineless Asteraceae, which are common indicators of glacial conditions in Australia) at TOR indicates significantly cooler temperatures (mean annual temperature up to 11oC lower than today) extending into the subtropics. Pollen taxa present also indicate mean annual precipitation up to 65% lower than modern. Similarities between the vegetation at TOR during the Last Glacial Maximum (LGM) and that at temperate sites e.g. Caledonia Fen, Victoria (Kershaw et al. 2007b), Redhead Lagoon, New South Wales (Williams et al. 2006) and Barrington Tops, New South Wales (Sweller and Martin 2001) suggests that this record reflects regional conditions across southeastern Australia. The TOR record also correlates well with that from nearby Native Companion Lagoon which suggests that the LGM was actually an extended period of ca. 8 – 10 kyr, characterised by 2 periods of increased aridity (ca. 30 – 26.5 kyr and 21 – 19.5 kyr) (Petherick et al. 2008a). A growing number of records from across the Southern Hemisphere e.g. New Zealand (Suggate and Almond 2003; Alloway et al. 2007; Newnham et al. 2007a), Chile (Denton et al. 1999b), Antarctica (Röthlisberger et al. 2002; EPICA 2006) and Australia (Smith 2009) also show evidence that the LGM encompassed a longer period of time than traditionally accepted, and was not uniformly cool and dry. As such, it is suggested that the early onset of the termination of the LGC in the Southern Hemisphere occurred from ca. 35 – 30 kyr, and was possibly driven by summer insolation minima in the high southern latitudes. In addition, trace element compositions of inorganic deposits archived in the TOR sediments were used to provenance dust to continental source areas. Such provenance allowed the reconstruction of major dust transport pathways to NSI during the LGM, which in turn allowed associated synoptic scale conditions to be suggested. The position and strength of dust transport pathways for eastern Australia during the termination of the LGC provides new insights into climatic conditions in the region. Our reconstructions show that latitudinal westerly wind circulation was dominant during the LGM in two phases, suggesting an equatorward shift in the position of the westerlies. Westerlies appeared to shift poleward during the interstadial period, when southeasterly trade winds became more influential on NSI
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
Late Quaternary vegetation history of North Stradbroke Island, Queensland, eastern Australia
Get PDFCurrently there is a paucity of records of late Quaternary palaeoenvironmental variability available from the subtropics of Australia. The three continuous palaeoecological records presented here, from North Stradbroke Island, subtropical Queensland, assist in bridging this large spatial gap in the current state of knowledge. The dominance of arboreal taxa in the pollen records throughout the past >40,000 years is in contrast with the majority of records from temperate Australia, and indicates a positive moisture balance for North Stradbroke Island. The charcoal records show considerable inter-site variability indicating the importance of local-scale events on individual records, and highlighting the caution that needs to be applied when interpreting a single site as a regional record. The variability in the burning regimes is interpreted as being influenced by both climatic and human factors. Despite this inter-site variability, broad environmental trends are identifiable, with changes in the three records comparable with the OZ-INTIMATE climate synthesis for the last 35,000 years. © 2013 Elsevier Ltd.Patrick T. Moss, John Tibby, Lynda Petherick, Hamish McGowan, Cameron Bar
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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