1,720,972 research outputs found
Figure 9 in New species and global revision of Hippasteria (Hippasterinae: Goniasteridae; Asteroidea; Echinodermata)
No full textFigure 9. Hippasteria tiburoni sp. nov. USNM 1208019. Scale bar = 0.5 cm for all unless specified otherwise. A, abactinal surface. B, actinal surface. C, marginal plate series. D, oral view showing mouth region with spines and other accessories. Scale bar = 3.0 mm. E, actinolateral view showing marginal plates, actinal and furrow spines.Published as part of Mah, Christopher, Neill, Kate, Eléaume, Marc & Foltz, David, 2014, New species and global revision of Hippasteria (Hippasterinae: Goniasteridae; Asteroidea; Echinodermata), pp. 422-456 in Zoological Journal of the Linnean Society 171 (2) on page 449, DOI: 10.1111/zoj.12131, http://zenodo.org/record/489058
Hippasterinae VERRILL 1899
No full textSUBFAMILY HIPPASTERINAE VERRILL, 1899 Verrill, 1899: 174; Fisher, 1906: 1165; 1910: 223; Spencer & Wright, 1966: U58; Mah et al., 2010: 270. Comments Mah et al. (2010) presented morphological evidence that supported recognition of the Hippasterinae within the Goniasteridae. Molecular evidence from Mah & Foltz (2011) also supported Hippasterinae as a discrete group. Diagnosis Pulpy tissue present, covering plates. Abactinal plates with spiny-granular or angular accessory fringe. Abactinal plates tightly articulated. Superomarginal and inferomarginal plates, wide to quadrate with large, prominent spines in most taxa. Pedicellariae enlarged, abundant, and often on raised base. Disk strongly swollen in most. Included taxa Evoplosoma Fisher, 1906, Gilbertaster Fisher, 1906, Hippasteria Gray, 1840, Sthenaster Mah et al., 2010.Published as part of Mah, Christopher, Neill, Kate, Eléaume, Marc & Foltz, David, 2014, New species and global revision of Hippasteria (Hippasterinae: Goniasteridae; Asteroidea; Echinodermata), pp. 422-456 in Zoological Journal of the Linnean Society 171 (2) on page 425, DOI: 10.1111/zoj.12131, http://zenodo.org/record/489058
FIGURE 4 in A new genus and species in the Sporolithales (Corallinophycidae, Rhodophyta) from northern New Zealand: Roseapetra farriae sp. nov.
No full textFIGURE 4. Cross section of upper cortex showing flared epithallial cells (arrows) (WELT A029118). Scale bar = 20 µm.Published as part of <i>Nelson, Wendy A., Neill, Kate F., Twist, Brenton A. & Sutherland, Judy E., 2021, A new genus and species in the Sporolithales (Corallinophycidae, Rhodophyta) from northern New Zealand: Roseapetra farriae sp. nov., pp. 35-46 in Phytotaxa 490 (1)</i> on page 39, DOI: 10.11646/phytotaxa.490.1.3, <a href="http://zenodo.org/record/5753658">http://zenodo.org/record/5753658</a>
FIGURE 10 in A new genus and species in the Sporolithales (Corallinophycidae, Rhodophyta) from northern New Zealand: Roseapetra farriae sp. nov.
No full textFIGURE 10. Carposporangial conceptacle with arrow pointing to rectangular carpospore (WELT A029118). Scale bar = 20 µm. FIGURE 11. Buried gametangial conceptacle (arrow) (WELT A029118). Scale bar = 50 µm.Published as part of <i>Nelson, Wendy A., Neill, Kate F., Twist, Brenton A. & Sutherland, Judy E., 2021, A new genus and species in the Sporolithales (Corallinophycidae, Rhodophyta) from northern New Zealand: Roseapetra farriae sp. nov., pp. 35-46 in Phytotaxa 490 (1)</i> on page 40, DOI: 10.11646/phytotaxa.490.1.3, <a href="http://zenodo.org/record/5753658">http://zenodo.org/record/5753658</a>
FIGURE 13 in A new genus and species in the Sporolithales (Corallinophycidae, Rhodophyta) from northern New Zealand: Roseapetra farriae sp. nov.
No full textFIGURE 13. Maximum likelihood phylogram of Sporolithales taxa estimated from concatenated psbA and rbcL sequence data. Support values are shown on each branch: approximate Likelihood Ratio Test (aLRT, %) and ML bootstrap (%) values above, and Bayesian PP values below. With the exception of support for Heydrichia, and support for the association of Roseapetra farriae with Sporolithon, only values greater than 0.8 (aLRT), 80% (bootstrap) and 0.9 (PP) are shown; all support values are shown if two support methods for a clade reach the cutoff value.Published as part of Nelson, Wendy A., Neill, Kate F., Twist, Brenton A. & Sutherland, Judy E., 2021, A new genus and species in the Sporolithales (Corallinophycidae, Rhodophyta) from northern New Zealand: Roseapetra farriae sp. nov., pp. 35-46 in Phytotaxa 490 (1) on page 42, DOI: 10.11646/phytotaxa.490.1.3, http://zenodo.org/record/575365
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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