1,721,014 research outputs found
Figure 1 in Charles Immanuel Forsyth Major's expedition to Madagascar, 1894 to 1896: beginnings of modern systematic study of the island's mammalian fauna
No full textFigure 1. Photograph of Charles Immanuel Forsyth Major from Stehlin (1925).Published as part of Jenkins, Paulina D. & Carleton, Michael D., 2005, Charles Immanuel Forsyth Major's expedition to Madagascar, 1894 to 1896: beginnings of modern systematic study of the island's mammalian fauna, pp. 1779-1818 in Journal of Natural History 39 (20) on page 1782, DOI: 10.1080/00222930400023719, http://zenodo.org/record/521504
Figure 3 in Species limits within the Praomys delectorum group (Rodentia: Muridae: Murinae) of East Africa: a morphometric reassessment and biogeographical implications
No full textFigure 3. Two scatter plots depicting results of 18 log-transformed craniodental variables as measured on 155 intact specimens representing samples from the Udzungwa Mts (OTU 15) and regions of the type localities of Praomys melanotus (OTUs 16–18) and P. taitae (OTU 1). The factor scores of the type specimens of melanotus and taitae are indicated by small crosses; see Table 3 for variable correlations and variance explained. A, projection of unrotated specimen scores onto the first and second principal components (PC) extracted; major axes of the species constellations and regression statistics are indicated (see text for discussion). Specimens from the Udzungwa Mts, a locality which Allen & Loveridge (1933) had allocated to their new species melanotus, are aligned with examples of P. taitae. B, projection of specimen scores, after varimax rotation, onto the first and second principal components (PC) extracted. Reorientation of major axes of the species constellations maximizes age variation along PC I, whereas taxon differences are consolidated mostly along PC II (see text for discussion).Published as part of Carleton, Michael D. & Stanley, William T., 2012, Species limits within the Praomys delectorum group (Rodentia: Muridae: Murinae) of East Africa: a morphometric reassessment and biogeographical implications, pp. 420-469 in Zoological Journal of the Linnean Society 165 (2) on page 429, DOI: 10.1111/j.1096-3642.2012.00817.x, http://zenodo.org/record/540795
FIGURE 3 in A new species of the rodent genus Hylomyscus from Angola, with a distributional summary of the H. anselli species group (Muridae: Murinae: Praomyini)
No full textFIGURE 3. Morphometric comparisons of the Angolan sample with Hylomyscus kerbispeterhansi based on analyses of 16 logtransformed craniodental variables; selected representatives of related species were included to provide multivariate context (see Material and Methods for variable abbreviations and Table 5 for variable loadings). A) Scatterplot of OTU centroids for the first two canonical variates (CV) extracted from six-group discriminant function analysis (H. anselli, N = 12; H. arcimontensis, N = 55—OTUs 3, 6, and 8; H. kerbispeterhansi, N = 6; Angolan sample, N = 13). Irregular polygons circumscribe maximal dispersion of specimen scores around an OTU centroid. B) Scatterplot of individual scores for the first two principal components (PC) extracted from ordination of specimens representing H. arcimontensis (OTU 3, N = 23), H. kerbispeterhansi (N = 6), and the Angolan sample (N = 13). Major axes of the species constellations and 1 SD confidence ellipses around the sample centroid are indicated (see text for discussion).Published as part of Carleton, Michael D., Banasiak, Rebecca A. & Stanley, William T., 2015, A new species of the rodent genus Hylomyscus from Angola, with a distributional summary of the H. anselli species group (Muridae: Murinae: Praomyini), pp. 101-128 in Zootaxa 4040 (2) on page 108, DOI: 10.11646/zootaxa.4040.2.1, http://zenodo.org/record/23510
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
Species limits within the Praomys delectorum group (Rodentia: Muridae: Murinae) of East Africa: a morphometric reassessment and biogeographical implications
No full textFigure 1. Mountainous regions of East Africa inhabited by populations of the Praomys delectorum complex, covering an area approximately 2–17°S by 30–41°E. Type localities are illustrated for the four species-group taxa currently assigned to Praomys delectorum: delectorum Thomas, 1910 (Malawi, Mulanje Plateau, 1675 m); melanotus Allen & Loveridge, 1933 (Tanzania, Poroto Mountains, Nyamwanga, 1950 m); octomastis Hatt, 1940 (Tanzania, Old Mbulu Reserve, 1829 m); taitae Heller, 1912 (Kenya, Taita Hills, Mount Mbololo, 1524 m). The Eastern Arc Mountains (sensu Wasser & Lovett 1993) are those disconnected ranges in Tanzania and southern Kenya that trend in a north-eastern direction from the Makambako Gap, including the Udzungwa Mountains through the Taita Hills.Published as part of Carleton, Michael D. & Stanley, William T., 2012, Species limits within the Praomys delectorum group (Rodentia: Muridae: Murinae) of East Africa: a morphometric reassessment and biogeographical implications, pp. 420-469 in Zoological Journal of the Linnean Society 165 (2) on page 422, DOI: 10.1111/j.1096-3642.2012.00817.x, http://zenodo.org/record/540795
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