1,721,064 research outputs found
A new species of Pegasus (Syngnathiformes: Pegasidae) from the South China Sea
No full textZhang, Rongrong, Wang, Xin, Wan, Shiming, Ma, Shaobo, Lin, Qiang (2020): A new species of Pegasus (Syngnathiformes: Pegasidae) from the South China Sea. Zootaxa 4894 (4): 521-534, DOI: 10.11646/zootaxa.4894.4.
FIGURE 6 in A new species of Pegasus (Syngnathiformes: Pegasidae) from the South China Sea
No full textFIGURE 6. Principal components analysis (PCA) scatterplot of geometric morphometry data of (A) the dorsal-shape contour and (B) dorsal-ridge shape in Pegasus nanhaiensis and Pegasus laternarius.Published as part of Zhang, Rongrong, Wang, Xin, Wan, Shiming, Ma, Shaobo & Lin, Qiang, 2020, A new species of Pegasus (Syngnathiformes: Pegasidae) from the South China Sea, pp. 521-534 in Zootaxa 4894 (4) on page 529, DOI: 10.11646/zootaxa.4894.4.2, http://zenodo.org/record/431667
FIGURE 1 in A new species of Pegasus (Syngnathiformes: Pegasidae) from the South China Sea
No full textFIGURE 1. Holotype of Pegasus nanhaiensis in (A) dorsal, (B) lateral, and (C) ventral views, TMBC030695 (61.7 mm SL), Yangjiang, northern South China Sea, China, 20 July 2019.Published as part of Zhang, Rongrong, Wang, Xin, Wan, Shiming, Ma, Shaobo & Lin, Qiang, 2020, A new species of Pegasus (Syngnathiformes: Pegasidae) from the South China Sea, pp. 521-534 in Zootaxa 4894 (4) on page 524, DOI: 10.11646/zootaxa.4894.4.2, http://zenodo.org/record/431667
Deep sea records of the continental weathering and erosion response to East Asian monsoon intensification since 14ka in the South China Sea
No full textWe analyzed sediment from Ocean Drilling Program (ODP) Site 1144 in the northern South China Sea to examine the weathering response of SE Asia to the strengthening of the East Asian Monsoon (EAM) since 14 ka. Our high-resolution record highlights the decoupling between continental chemical weathering, physical erosion and summer monsoon intensity. Mass accumulation rates, Ti/Ca, K/Rb, hematite/goethite and 87Sr/86Sr show sharp excursions from 11 to 8 ka, peaking at 10 ka. Clay minerals show a shorter-lived response with a higher kaolinite/(illite + chlorite) ratio at 10.7–9.5 ka. However, not all proxies show a clear response to environmental changes. Magnetic susceptibility rises sharply between 12 and 11 ka. Grain-size becomes finer from 14 to 10 ka and then coarsens until ~ 7 ka, but is probably controlled by bottom current flow and sealevel. Sr and Nd isotopes show that material is dominantly eroded from Taiwan with a lesser flux from Luzon, while clay mineralogy suggests that the primary sources during the Early Holocene were reworked via the shelf in the Taiwan Strait, rather than directly from Taiwan. Erosion was enhanced during monsoon strengthening and caused reworking of chemically weathered Pleistocene sediment largely from the now flooded Taiwan Strait, which was transgressed by ~ 8 ka, cutting off supply to the deep-water slope. None of the proxies shows an erosional response lasting until ~ 6 ka, when speleothem oxygen isotope records indicate the start of monsoon weakening. Although more weathered sediments were deposited from 11 to 8 ka when the monsoon was strong these are reworked and represent more weathering during the last glacial maximum (LGM) when the summer monsoon was weaker but the shelves were exposed
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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