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Astronomische Nachrichten, t. 188, nos 4489-4512
No full textF. G. Astronomische Nachrichten, t. 188, nos 4489-4512. In: Bulletin astronomique, tome 30, 1913. pp. 461-484
Anomalous surface brightness fluctuations in NGC 4489
No full textAnomalously high K-band surface brightness fluctuations (SBF) have
been reported in NGC 4489 by Pahre & Mould ([CITE]), Jensen et al.
([CITE]) and Jensen et al. ([CITE]). However, these conclusions were
uncertain because of relatively low signal-to-noise data. New high
signal-to-noise data for NGC 4489 have been obtained at the NOAO/KPNO
2.1 m and the ESO/La Silla 3.5 m NTT telescopes. Adopting the I-band
SBF distance modulus determined by Tonry et al. ([CITE]) and the
versus () calibration of Tonry et al. ([CITE]), a
value of mag was derived. Relative to
the average empirical derived for giant ellipticals by
Jensen et al. ([CITE]) ( mag), the detection of
an anomalous K-band SBF in NGC 4489 is confirmed at the two sigma
level. Such anomalous fluctuations could be caused by an extended
giant branch, consisting of either intermediate-age AGB stars above
the tip of the first-ascent giant branch or high-metallicity
first-ascent giants, or by lack of a full understanding of the K-band SBF calibration. This result raises questions about the accuracy
of K-band SBF distance measurements for elliptical galaxies with
unknown stellar composition and underscores the need for measurements over a larger range of color and luminosity
Failure to diagnose fatal disseminated toxoplasmosis in a bone marrow transplant recipient : the possible significance of declining antibody titres.
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4489.pdf (Publisher’s version ) (Open Access
Linked collectors and determiners for: A new species of Setostylus Matile and new records of Setostylus bellulus (Williston) (Diptera: Keroplatidae).
No full textNatural history specimen data linked to collectors and determiners held within, "A new species of Setostylus Matile and new records of Setostylus bellulus (Williston) (Diptera: Keroplatidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/ed3cece9-7757-4489-9f91-f9e52afbe067">https://bionomia.net/dataset/ed3cece9-7757-4489-9f91-f9e52afbe067</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/ed3cece9-7757-4489-9f91-f9e52afbe067">https://gbif.org/dataset/ed3cece9-7757-4489-9f91-f9e52afbe067</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Description of larvae of Japanese Macronychini (Coleoptera: Elmidae: Elminae).
No full textNatural history specimen data linked to collectors and determiners held within, "Description of larvae of Japanese Macronychini (Coleoptera: Elmidae: Elminae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/7ec5a262-b30b-4489-87ec-c3b197ed2088">https://bionomia.net/dataset/7ec5a262-b30b-4489-87ec-c3b197ed2088</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/7ec5a262-b30b-4489-87ec-c3b197ed2088">https://gbif.org/dataset/7ec5a262-b30b-4489-87ec-c3b197ed2088</a>. Formatted as a Frictionless Data package
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
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