1,720,967 research outputs found
Investigating gut contents of the leptocleidian plesiosaur <i>Umoonasaurus demoscyllus</i> using micro-CT imaging
No full textThe holotype of Umoonasaurus demoscyllus (AM F.99374) is one of the most complete plesiosaur skeletons ever discovered in Australia. It preserves a gastric mass in the pectoral girdle region that has not yet been documented in detail. Here, we use high resolution micro-computed tomography (micro-CT) to image the gut contents of this specimen. These comprise 17 vertebrae from an unidentified teleost, together with at least 60 rounded gastroliths averaging about 5 mm in maximum length. Our study demonstrates the potential for 3D tomographic imaging to investigate Mesozoic marine reptile diets and ecology. Joshua M. White [[email protected]], Research School of Physics, Department of Materials Physics, Australian National University, Canberra, ACT 2601, Australia; Australian Museum Research Institute, 1 William Street, Sydney, New South Wales 2010, Australia. Aleese Barron [[email protected]], Research School of Physics, Department of Materials Physics, Australian National University, Canberra ACT, 2601, Australia; School of Archaeology and Anthropology, Banks Building, Australian National University, Canberra, ACT 2601, Australia. Matthew R. McCurry [[email protected]], Australian Museum Research Institute, 1 William Street, Sydney, New South Wales 2010, Australia; Earth and Sustainability Science Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales 2052, Australia; Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA. Tim Denham [[email protected]], School of Archaeology and Anthropology, Banks Building, Australian National University, Canberra, ACT 2601, Australia.</p
Vegecultures and the social-biological transformations of plants and people
No full textThe social entanglements of vegetative reproduction are considered for three neighbouring tropical regions that are often considered to exhibit very different histories of plant exploitation during the Holocene: early and independent agricultural development on New Guinea; introduction of agriculture to Island Southeast Asia during the last 3000–4000 years; and, Australia as the ‘hunter–gatherer’ continent. Following recent reassessments that emphasise the commonalities of many plant exploitation practices across these three regions, the focus here is upon the shared vegetative disposition, or orientation, of people to plants. The intention is to provide insight on how people's awareness of the vegetative reproductive capacity of plants has been mutually constitutive for the production and reproduction of their social worlds, whether by groups ordinarily referred to as ‘hunter–gatherer’ or ‘horticulturalist’
Vegecultures and the social-biological transformations of plants and people
No full textThe social entanglements of vegetative reproduction are considered for three neighbouring tropical regions that are often considered to exhibit very different histories of plant exploitation during the Holocene: early and independent agricultural development on New Guinea; introduction of agriculture to Island Southeast Asia during the last 3000–4000 years; and, Australia as the ‘hunter–gatherer’ continent. Following recent reassessments that emphasise the commonalities of many plant exploitation practices across these three regions, the focus here is upon the shared vegetative disposition, or orientation, of people to plants. The intention is to provide insight on how people's awareness of the vegetative reproductive capacity of plants has been mutually constitutive for the production and reproduction of their social worlds, whether by groups ordinarily referred to as ‘hunter–gatherer’ or ‘horticulturalist’
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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