1,724,498 research outputs found
Linked collectors and determiners for: First record of Neoempheria Osten Sacken (Diptera, Mycetophilidae) biology in the Neotropical region, with associations between its larvae and fungi.
No full textNatural history specimen data linked to collectors and determiners held within, "First record of Neoempheria Osten Sacken (Diptera, Mycetophilidae) biology in the Neotropical region, with associations between its larvae and fungi". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/5386431c-613e-4568-b9ec-053fba9bda18">https://bionomia.net/dataset/5386431c-613e-4568-b9ec-053fba9bda18</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/5386431c-613e-4568-b9ec-053fba9bda18">https://gbif.org/dataset/5386431c-613e-4568-b9ec-053fba9bda18</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Estudio florístico de las algas marinas de la parte del Golfo de California, México.
No full textNatural history specimen data linked to collectors and determiners held within, "Estudio florístico de las algas marinas de la parte del Golfo de California, México". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/fcbb959f-5b14-4568-a471-1a3c53bf1b74">https://bionomia.net/dataset/fcbb959f-5b14-4568-a471-1a3c53bf1b74</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/fcbb959f-5b14-4568-a471-1a3c53bf1b74">https://gbif.org/dataset/fcbb959f-5b14-4568-a471-1a3c53bf1b74</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: First record of Neoempheria Osten Sacken (Diptera, Mycetophilidae) biology in the Neotropical region, with associations between its larvae and fungi.
No full textNatural history specimen data linked to collectors and determiners held within, "First record of Neoempheria Osten Sacken (Diptera, Mycetophilidae) biology in the Neotropical region, with associations between its larvae and fungi". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/5386431c-613e-4568-b9ec-053fba9bda18">https://bionomia.net/dataset/5386431c-613e-4568-b9ec-053fba9bda18</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/5386431c-613e-4568-b9ec-053fba9bda18">https://gbif.org/dataset/5386431c-613e-4568-b9ec-053fba9bda18</a>. Formatted as a Frictionless Data package
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Linked collectors and determiners for: An integrative taxonomy of the genus Stasimopus Simon 1892 (Araneae: Mygalomorphae) of the Karoo with the description of nine new species and a Stasimopus maraisi Hewitt 1914 male.
No full textNatural history specimen data linked to collectors and determiners held within, "An integrative taxonomy of the genus Stasimopus Simon 1892 (Araneae: Mygalomorphae) of the Karoo with the description of nine new species and a Stasimopus maraisi Hewitt 1914 male". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/94a062b7-8464-4568-ac3b-5a259cb5fa50">https://bionomia.net/dataset/94a062b7-8464-4568-ac3b-5a259cb5fa50</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/94a062b7-8464-4568-ac3b-5a259cb5fa50">https://gbif.org/dataset/94a062b7-8464-4568-ac3b-5a259cb5fa50</a>. Formatted as a Frictionless Data package
Variations on the Author
No full text“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
No full textWe 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
The Type Ic SN 1990B in NGC 4568
No full textArtículo de publicación ISIWe present a study of the Type Ic supernova (SN) 1990B that includes most of the observations
obtained from around the world. The combined data set comprises 84 BV (RI)c photometric points spanning
approximately 360 days after maximum light and 14 spectra from 5 up to D150 days after
maximum light. In contrast to other Type Ic SNe, SN 1990B did not display a weak but distinct He I
j5876 line indicating that its He content was smaller or that the He layers were rather e ectively shielded
from the radioactive matter in the ejecta. The behavior of the Na I D line, however, suggests that
He I j5876 was blended with it. SN 1990B appeared on a sharply varying background that complicates
the usual techniques of digital photometry. In order to do unbiased photometry, we modeled and subtracted
the background of each image with the SN using images of NGC 4568 taken D2500 days after
the explosion, when SN 1990B had faded beyond detection. We compare the performance of standard
point-spread function Ðtting photometry of the SN in the images with and without the background of
the parent galaxy and Ðnd the results to di er systematically at late times. The photometry done on the
images with the background light of NGC 4568 subtracted shows the light curves of SN 1990B to be of
the slow Type Ic variety, with a slope steeper than that of the Type Ib SN 1983N or the Type II transition
(Type IIb) SN 1993J but slower than that of the Type Ic SN 1994I. We estimate the reddening by
foreground matter in the Galaxy and NGC 4568 and compute BV (RI)c light curves spanning D110 days
after maximum light
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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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