1,720,957 research outputs found
Figure 10 in Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus
No full textFigure 10. Log-log plots of A, total endocranial volume and body size; B, cerebral volume and body size; C, cerebral volume and total endocranial volume. Closed circles indicate penguin taxa. Paraptenodytes is shown as a closed star. All other avian taxa are indicated by open circles. Dashed lines indicate 95% confidence intervals.Published as part of Ksepka, Daniel T., Balanoff, Amy M., Walsh, Stig, Revan, Ariel & Ho, Amy, 2012, Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus, pp. 202-219 in Zoological Journal of the Linnean Society 166 on page 214, DOI: 10.1111/j.1096-3642.2012.00835.x, http://zenodo.org/record/540819
Figure 8 in Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus
No full textFigure 8. Virtual endocasts of the brain and labyrinth of A, Paraptenodytes antarcticus (fossil stem penguin) and B, Aptenodytes patagonicus (king penguin) in lateral aspect, illustrating relative size of the labyrinth.Published as part of Ksepka, Daniel T., Balanoff, Amy M., Walsh, Stig, Revan, Ariel & Ho, Amy, 2012, Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus, pp. 202-219 in Zoological Journal of the Linnean Society 166 on page 213, DOI: 10.1111/j.1096-3642.2012.00835.x, http://zenodo.org/record/540819
Figure 1. A in Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus
No full textFigure 1. A, simplified phylogeny of penguins after Ksepka et al. (2006) showing relationships of outgroup taxa, the stem penguin Paraptenodytes antarcticus, and crown clade (Spheniscidae) penguins studied here. B, the fossil skull of Pa. antarcticus (AMNH 3338) reconstructed and rendered from computed tomography scan data. Abbreviation: r, metal rod inserted to display specimen.Published as part of Ksepka, Daniel T., Balanoff, Amy M., Walsh, Stig, Revan, Ariel & Ho, Amy, 2012, Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus, pp. 202-219 in Zoological Journal of the Linnean Society 166 on page 204, DOI: 10.1111/j.1096-3642.2012.00835.x, http://zenodo.org/record/540819
Figure 5 in Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus
No full textFigure 5. Virtual endocasts of A, Gavia immer (common loon); B, Phoebastria immutabilis (Laysan albatross); C, Paraptenodytes antarcticus (fossil stem penguin); D, Spheniscus humboldti (Humboldt penguin); E, Aptenodytes patagonicus (king penguin); and F, Pygoscelis antarctica (chinstrap penguin) in ventral aspect. Abbreviations: c, cerebrum; cca, cranial carotid artery; fl, floccular lobe; ob, olfactory bulb; ol, optic lobe; pb, pituitary body; II-XI, cranial nerves II-XI.Published as part of Ksepka, Daniel T., Balanoff, Amy M., Walsh, Stig, Revan, Ariel & Ho, Amy, 2012, Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus, pp. 202-219 in Zoological Journal of the Linnean Society 166 on page 210, DOI: 10.1111/j.1096-3642.2012.00835.x, http://zenodo.org/record/540819
Figure 7 in Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus
No full textFigure 7. Virtual endocasts of the labyrinth of A, Gavia immer (common loon); B, Phoebastria immutabilis (Laysan albatross); C, Paraptenodytes antarcticus (fossil stem penguin); D, Spheniscus humboldti (Humboldt penguin); E, Aptenodytes patagonicus (king penguin); and F, Pygoscelis antarctica (chinstrap penguin) in posterior aspect. Abbreviations: aa, ampulla of anterior semicircular canal; asc, anterior semicircular canal; cc, common crus; ed, endolymphatic duct; ha, ampulla of horizontal semicircular canal; hsc, horizontal semicircular canal; lc, lagenar canal; pa, ampulla of posterior semicircular canal; psc, posterior semicircular canal; vf, vestibular foramen.Published as part of Ksepka, Daniel T., Balanoff, Amy M., Walsh, Stig, Revan, Ariel & Ho, Amy, 2012, Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus, pp. 202-219 in Zoological Journal of the Linnean Society 166 on page 212, DOI: 10.1111/j.1096-3642.2012.00835.x, http://zenodo.org/record/540819
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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