1,720,989 research outputs found
FIGURES 1–4 in Two new species of Plagiostriata (Bacillariophyaceae) from sand sediments of southern China
No full textFIGURES 1–4. LM micrographs of Plagiostriata xiapuensis sp. nov. from type material. Fig. 1 corresponds to the holotype. Scale bars = 10 μm.Published as part of Zhang, Weiyu, Wang, Zhen, Zhuo, Suqing, Gao, Yahui, Li, Xuesong, Liang, Junrong & Chen, Changping, 2022, Two new species of Plagiostriata (Bacillariophyaceae) from sand sediments of southern China, pp. 87-93 in Phytotaxa 556 (1) on page 89, DOI: 10.11646/phytotaxa.556.1.7, http://zenodo.org/record/695213
FIGURES 1–20 in A new small marine Diploneis species (Diploneidaceae, Bacillariophyta) from Guangdong Province, China
No full textFIGURES 1–20. Diploneis guangdongensis sp. nov. LM. 1–20. Valve view showing the size and shape. Fig. 2. Holotype specimen. Scale bars = 10 µm.Published as part of Wu, Weiwei, Sun, Lin, Li, Xuesong, Liang, Junrong, Gao, Yahui & Chen, Changping, 2022, A new small marine Diploneis species (Diploneidaceae, Bacillariophyta) from Guangdong Province, China, pp. 233-240 in Phytotaxa 560 (2) on page 235, DOI: 10.11646/phytotaxa.560.2.6, http://zenodo.org/record/704054
FIGURES 27–32 in A new small marine Diploneis species (Diploneidaceae, Bacillariophyta) from Guangdong Province, China
No full textFIGURES 27–32. Diploneis guangdongensis sp. nov., SEM internal valve views. 27. View of the entire valve. 28. Girdle bands. 29. Valve central area with slightly expanded proximal raphe endings bent to the same side of the valve. 30. Distal raphe endings and elongated alveoli occluded by a thin siliceous layer with perforations arranged in a hexagonal array. 31–32. Areolae in the corroded valve. Scale bars = 1 µm (Figs 27–28, 30, 32); 500 nm (Figs 29, 31).Published as part of Wu, Weiwei, Sun, Lin, Li, Xuesong, Liang, Junrong, Gao, Yahui & Chen, Changping, 2022, A new small marine Diploneis species (Diploneidaceae, Bacillariophyta) from Guangdong Province, China, pp. 233-240 in Phytotaxa 560 (2) on page 238, DOI: 10.11646/phytotaxa.560.2.6, http://zenodo.org/record/704054
FIGURES 5–12 in Two new species of Plagiostriata (Bacillariophyaceae) from sand sediments of southern China
No full textFIGURES 5–12. Plagiostriata xiapuensis sp. nov from type material, SEM. 5–7. External views of the valve with a rimoportula (arrow). 8. Apical fields of the external valve. 9. Central area of a valve with no rimoportula. 10. Apical fields of the internal valve. Areolae round, occluded by simple vola (arrows). 11, 12. Internal views of the valve with a rimoportula (arrow). Scale bars = 1 μm (Figs. 5–7, 9, 11, 12), 0.2 μm (Figs. 8, 10).Published as part of Zhang, Weiyu, Wang, Zhen, Zhuo, Suqing, Gao, Yahui, Li, Xuesong, Liang, Junrong & Chen, Changping, 2022, Two new species of Plagiostriata (Bacillariophyaceae) from sand sediments of southern China, pp. 87-93 in Phytotaxa 556 (1) on page 89, DOI: 10.11646/phytotaxa.556.1.7, http://zenodo.org/record/695213
FIGURES 21–26 in A new small marine Diploneis species (Diploneidaceae, Bacillariophyta) from Guangdong Province, China
No full textFIGURES 21–26. Diploneis guangdongensis sp. nov., SEM external valve view. 21. External view of the whole valve. 22–23. External view of the elongated slits (Fig. 22, white arrow) and distal raphe endings. 24. Expanded, drop-shaped proximal raphe endings and structure of the longitudinal canal; the elongated slits are formed as an interspace between costae (white arrow). 25. Girdle bands. 26. External opening of alveoli covered with volae. Scale bars = 1 µm (Figs 21–22, 24–26); 500 nm (Fig. 23).Published as part of Wu, Weiwei, Sun, Lin, Li, Xuesong, Liang, Junrong, Gao, Yahui & Chen, Changping, 2022, A new small marine Diploneis species (Diploneidaceae, Bacillariophyta) from Guangdong Province, China, pp. 233-240 in Phytotaxa 560 (2) on page 236, DOI: 10.11646/phytotaxa.560.2.6, http://zenodo.org/record/704054
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
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