1,721,036 research outputs found
Notes on the systematic position of the wolves of the canis dirus group
No full textMerriam, John C. (1918): Notes on the systematic position of the wolves of the canis dirus group. Bulletin of the Department of Geology. 10: 531-533, DOI: http://doi.org/10.5281/zenodo.4443191, URL: https://www.biodiversitylibrary.org/item/13901
Aecnocyon ayersi Merriam 1918
No full textAecnocyon ayersi (Sellards) is characterized by large size, relatively narrowness of facial region compared with A. dirus, massiveness of dentition, and relatively wide spacing of the premolars.Published as part of Merriam, John C., 1918, Notes on the systematic position of the wolves of the canis dirus group, pp. 531-533 in Bulletin of the Department of Geology. 10 on page 1913, DOI: 10.5281/zenodo.444319
Aenocyon dirus (Leidy) 1918
No full text<p> Aenooyon. <i>dírus</i> * (Leidy)</p> <p>is</p> <p>represented in the Rancho La Brea fauna by a wide variety of forms, but always characterized by large size, massiveness of dentition, relatively great width of palate, and of facial region.</p>Published as part of <i>Merriam, John C., 1918, Notes on the systematic position of the wolves of the canis dirus group, pp. 531-533 in Bulletin of the Department of Geology. 10</i> on page 1913, DOI: <a href="http://zenodo.org/record/4443191">10.5281/zenodo.4443191</a>
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
A rodent fauna from later Cenozoic beds of southwestern Idaho
Get PDFThe late Pliocene or early Pleistocene continental deposits occurring
in southwestern Idaho have yielded scattered fossil mammalian
remains during the past forty years or more. However, with the
exception of beaver material described as Castor accessor by O. P. Hay
nothing has been recorded concerning the rodents from these beds.
That a diversified assemblage of types occurs in these later Cenozoic
sediments is clearly shown by collections procured in recent years in
the course of palaeontological explorations along the Snake River
near Grand View and Hagerman, Idaho.
The westerly of the two principal localities in this region of Idaho is
situated on the west side of the Snake River approximately thirteen
miles northwest of the town of Grand View. This site was investigated
by the California Institute of Technology. The Hagerman locality,
where extensive excavations were conducted by the United States
National Museum, is situated on the Snake River across from the town
of Hagerman. In an airline, the distance between the localities at
Grand View and Hagerman is approximately sixty miles.
The United States National Museum has generously permitted me
to borrow the rodent collections obtained by that institution at the
Hagerman locality. The beaver remains were not included, since
important studies of this group are being conducted elsewhere. The
present paper embraces therefore a study of the rodent types now
known from the Hagerman and Grand View localities, with the exception
of the material noted above, and grateful acknowledgment
is made here for opportunity to study the National Museum collections.
Recent comparative material was loaned by the Division of Vertebrate
Zoology, California Institute. The illustrations of the rodent material
were prepared from photographic enlargements by John L. Ridgway.
The author also wishes to thank Dr. Chester Stock for opportunity to
study the California Institute collections and for supervision of the
work, as well as for a critical reading of the manuscript
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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