1,720,954 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
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
A Last Glacial Maximum to Present Paleoenvironmental Investigation of Port Pegasus, Stewart Island, New Zealand
No full textAlmost all modern-day estuaries evolved during the Holocene and contain sedimentary sequences that preserve the evolution of these coastal environments. Incised-valley fill sequences in estuaries often contain facies that illustrate the transition from terrestrial to marine conditions during post-glacial sea-level rise. The timing of sea-level rise and inundation can be constrained by dating these transitions, and geochemical characterization of the facies exposed in sediment cores provides information about the ways in which sea-level incursion has altered the sediment deposition and carbon accumulation in these environments. Coastal margins are known to be hot spots of carbon accumulation and burial and important components of the global carbon cycle. However, more information is needed to fully understand carbon sequestration processes, rates, and variability, particularly as sea-level begins to rise again after the Holocene still stand (7.5-7.3 ka).
The location of this study, Port Pegasus, is an incised valley estuary located on the southeast margin of Stewart Island, New Zealand, at 47°S. Multibeam bathymetric surveys in combination with tide and catchment data are used to characterize Port Pegasus as a drowned valley, mixed energy estuary with low fluvial input and sediment depocenters within its back basins, and seismic surveys are used to identify and interpret the stratigraphic fill as a transgressive sequence. Five sediment cores sample terrestrial to marine flooding surfaces and sedimentary depocenters and are analyzed for physical properties, paleomagnetic parameters, elemental data, and bulk carbon and nitrogen concentrations and stable isotopes. Radiocarbon ages date the terrestrial to marine transition, identified using geochemical data, and the flooding of Port Pegasus at -22 m to 11.6-11.1 ka. Carbon accumulation rates show that zones of high carbon accumulation shifted from a terrestrial depocenter in the central basin of the inlet with an accumulation rate of 10 g C m-2 yr-1 to the present-day marine depocenters in the isolated back basins with an average rate of 19 g C m-2 yr-1, suggesting that sea-level incursion had a significant influence on carbon accumulation dynamics in the estuary. The source of the organic carbon has also changed; the underlying facies shows a clear abundance of terrestrial organic matter, whereas all Holocene and modern sediment is dominated by marine organic matter. Analysis of back basin sediment cores demonstrates that Port Pegasus may be a promising new location for paleoclimate reconstructions of Southern Hemisphere westerly wind variability and that cores extracted closer to the fluvial inputs in the estuary will likely contain terrestrial signals that vary with the magnitude of freshwater flux. This study gives insights into New Zealand Holocene sea-level rise and the potential role of meltwater pulses in coastal estuarine formation as well as the significant effect of sea-level transgression on coastal carbon storage dynamics and the important role that drowned valley systems such as Port Pegasus play in the global carbon cycle
A Last Glacial Maximum to Present Paleoenvironmental Investigation of Port Pegasus, Stewart Island, New Zealand
Get PDFAlmost all modern-day estuaries evolved during the Holocene and contain sedimentary sequences that preserve the evolution of these coastal environments. Incised-valley fill sequences in estuaries often contain facies that illustrate the transition from terrestrial to marine conditions during post-glacial sea-level rise. The timing of sea-level rise and inundation can be constrained by dating these transitions, and geochemical characterization of the facies exposed in sediment cores provides information about the ways in which sea-level incursion has altered the sediment deposition and carbon accumulation in these environments. Coastal margins are known to be hot spots of carbon accumulation and burial and important components of the global carbon cycle. However, more information is needed to fully understand carbon sequestration processes, rates, and variability, particularly as sea-level begins to rise again after the Holocene still stand (7.5-7.3 ka).
The location of this study, Port Pegasus, is an incised valley estuary located on the southeast margin of Stewart Island, New Zealand, at 47°S. Multibeam bathymetric surveys in combination with tide and catchment data are used to characterize Port Pegasus as a drowned valley, mixed energy estuary with low fluvial input and sediment depocenters within its back basins, and seismic surveys are used to identify and interpret the stratigraphic fill as a transgressive sequence. Five sediment cores sample terrestrial to marine flooding surfaces and sedimentary depocenters and are analyzed for physical properties, paleomagnetic parameters, elemental data, and bulk carbon and nitrogen concentrations and stable isotopes. Radiocarbon ages date the terrestrial to marine transition, identified using geochemical data, and the flooding of Port Pegasus at -22 m to 11.6-11.1 ka. Carbon accumulation rates show that zones of high carbon accumulation shifted from a terrestrial depocenter in the central basin of the inlet with an accumulation rate of 10 g C m-2 yr-1 to the present-day marine depocenters in the isolated back basins with an average rate of 19 g C m-2 yr-1, suggesting that sea-level incursion had a significant influence on carbon accumulation dynamics in the estuary. The source of the organic carbon has also changed; the underlying facies shows a clear abundance of terrestrial organic matter, whereas all Holocene and modern sediment is dominated by marine organic matter. Analysis of back basin sediment cores demonstrates that Port Pegasus may be a promising new location for paleoclimate reconstructions of Southern Hemisphere westerly wind variability and that cores extracted closer to the fluvial inputs in the estuary will likely contain terrestrial signals that vary with the magnitude of freshwater flux. This study gives insights into New Zealand Holocene sea-level rise and the potential role of meltwater pulses in coastal estuarine formation as well as the significant effect of sea-level transgression on coastal carbon storage dynamics and the important role that drowned valley systems such as Port Pegasus play in the global carbon cycle
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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