1,720,989 research outputs found
Fig. 15. PVL 3894 in Osteology of Andescynodon (Cynodontia: Traversodontidae) from the Middle Triassic of Argentina
No full textFig. 15. PVL 3894, left femur in A, anterior; and B, posterior views. Abbreviations as in text.Published as part of Liu, Jun & Powell, Jaime, 2009, Osteology of Andescynodon (Cynodontia: Traversodontidae) from the Middle Triassic of Argentina, pp. 1-20 in American Museum Novitates 3674 on page 17, DOI: 10.1206/606.1, http://zenodo.org/record/535812
Fig. 6. Specimen PVL 3892a in Osteology of Andescynodon (Cynodontia: Traversodontidae) from the Middle Triassic of Argentina
No full textFig. 6. Specimen PVL 3892a in lateral view. Abbreviations as in text.Published as part of Liu, Jun & Powell, Jaime, 2009, Osteology of Andescynodon (Cynodontia: Traversodontidae) from the Middle Triassic of Argentina, pp. 1-20 in American Museum Novitates 3674 on page 8, DOI: 10.1206/606.1, http://zenodo.org/record/535812
Fig. 12. PVL 3894 in Osteology of Andescynodon (Cynodontia: Traversodontidae) from the Middle Triassic of Argentina
No full textFig. 12. PVL 3894, right clavicle in A, anterodorsal; and B, posterior and slightly ventral views; left clavicle in C, anterodorsal; and D, posterior and slightly ventral views. Abbreviations as in text.Published as part of Liu, Jun & Powell, Jaime, 2009, Osteology of Andescynodon (Cynodontia: Traversodontidae) from the Middle Triassic of Argentina, pp. 1-20 in American Museum Novitates 3674 on page 14, DOI: 10.1206/606.1, http://zenodo.org/record/535812
Osteology of Andescynodon (Cynodontia: Traversodontidae) from the Middle Triassic of Argentina
No full textLiu, Jun, Powell, Jaime (2009): Osteology of Andescynodon (Cynodontia: Traversodontidae) from the Middle Triassic of Argentina. American Museum Novitates 3674: 1-20, DOI: 10.1206/606.1, URL: http://www.bioone.org/doi/abs/10.1206/606.
Osteology of Andescynodon (Cynodontia, Traversodontidae) from the middle triassic of Argentina.
Full text linkAll available specimens of Andescynodon mendozensis and Rusconiodon mignonei are examined and restudied, and the latter species is regarded as a junior synonym of the former. The postcranial skeleton of this species is described for the first time; it generally shows primitive features of traversodontids. Andescynodon mendozensis is a small- to medium-sized traversodontid characterized by 9~11 upper postcanines in adults (fewer in larger individuals), the transverse ridge of upper postcanines lying anteriorly on the tooth, paracanine fossa penetrating the skull roof in adult; it is differentiated from Pascualgnathus by relatively flatten skull, shorter and narrower temporal region, presence of four rather than three upper incisors.Fil: Powell, Jaime Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaFil: Jun, Liu. Chinese Academy of Sciences; República de Chin
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
Extreme postcranial pneumaticity in sauropod dinosaurs from South America
Full text linkBirds are unique among living tetrapods in possessing pneumaticity of the postcranial skeleton, with invasion of bone by the lung and air-sac system. Postcranial skeletal pneumaticity (PSP) has been reported in numerous extinct archosaurs including pterosaurs and non-avian dinosaurs. Here we report a case of extreme PSP in a group of small-bodied, armored sauropod dinosaurs from the Upper Cretaceous of South America. Based on osteological data, we report an extensive invasion of pneumatic diverticula along the vertebral column, reaching the distal portion of the tail. Also, we provide evidence of pneumaticity in both pectoral and pelvic girdles. Our study reveals that the extreme PSP in archosaurs is not restricted to pterosaurs and theropod dinosaurs. © 2012 Springer-Verlag.Fil: Cerda, Ignacio Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Salgado, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Powell, Jaime Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentin
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
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