1,724,294 research outputs found
Signing Statement - H.4594
No full textThis written statement addresses bill H.4594. The governor sometimes releases a written statement alongside signing a bill with remarks on the bill, including concerns or limitations
HI en NGC 4594
No full textHigh resolution 21 cm line observations of NGC 4594 have been carried out with the WSRT. The velocity range observed was 1090 to 1710 km s⁻¹ on 32 channels, 27 km s⁻¹ wide, spaced 20 km s⁻¹. This range covered the velocities observed on the east half of the galaxy. The synthesized antenna pattern resulted very elongated in the north south direction (24" x 122") because of the low southern declination (-11°.25). The observation, in consequence, consisted essentially in a scanning along the major axis of the galaxy. The antenna pattern also had large side lobes because of the impossibility of observing the galaxy during 12 hours continuously from Westerbork (max=8.6 hours). After the convolution by appropriate functions, and the subtraction of continuum point sources and associated rings, a set of 32 channel maps was produced. A marginally detectable HI feature was put in evidence on a velocity-position map when the 32 channel map cross cuts, along the major axis, of the galaxy were put together. The total HI mass for NGC 4594 derived from this map is about 13 x 10⁸ M⊙ (at a distance of 18.6 Mpc). The peculiar configuration of the HI indicates its concentration along a ring (or maybe two) but simple models do not reproduce all the basic features. The systematic velocity according to these results is close to 1100 km s⁻¹. The radius of the outermost HI ring (if not the only one) is about 15 Kpc and its half power width 6 Kpc. From these values it is evident that the gas is concentrated in the inner side of the dust ring. The highest HI observed velocity is 350 km/s.Asociación Argentina de Astronomí
ORBIT-BASED DYNAMICAL MODELS OF THE SOMBRERO GALAXY (NGC 4594)
Get PDFWe present axisymmetric, orbit-based models to study the central black hole (BH), stellarmass-to-light ratio (M/L), and dark matter (DM) halo of NGC 4594 (M104, the Sombrero Galaxy). For stellar kinematics, we use published high-resolution kinematics of the central region taken with the Hubble Space Telescope, newly obtained Gemini long-slit spectra of the major axis, and integral field kinematics from the Spectroscopic Areal Unit for Research on Optical Nebulae instrument. At large radii, we use globular cluster kinematics to trace the mass profile and apply extra leverage to recovering the DM halo parameters. We find a BH of mass M-center dot = (6.6 +/- 0.4) x 10(8) M-circle dot and determine the stellar M/L-I = 3.4 +/- 0.05 (uncertainties are the 68% confidence band marginalized over the other parameters). Our best-fit DM halo is a cored logarithmic model with asymptotic circular speed V-c = 376 +/- 12 km s(-1) and core radius r(c) = 4.7 +/- 0.6 kpc. The fraction of dark to total mass contained within the half-light radius is 0.52. Taking the bulge and disk components into account in our calculation of sigma(e) puts NGC 4594 squarely on the M-sigma relation. We also determine that NGC 4594 lies directly on the M-L relation.NSF 0908639Institute for Advanced Study, Corning Glass Works FoundationAstronom
Linked collectors and determiners for: CEN - Herbário da Embrapa Recursos Genéticos e Biotecnologia.
No full textNatural history specimen data linked to collectors and determiners held within, "CEN - Herbário da Embrapa Recursos Genéticos e Biotecnologia". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/e38d4c95-3a1d-4594-9ae9-883b48042e6d">https://bionomia.net/dataset/e38d4c95-3a1d-4594-9ae9-883b48042e6d</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/e38d4c95-3a1d-4594-9ae9-883b48042e6d">https://gbif.org/dataset/e38d4c95-3a1d-4594-9ae9-883b48042e6d</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
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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