1,723,741 research outputs found
Harmonium-Saal, Berlin W., Steglitzer Str. 35, Telephon: Lükow 6625
No full textHARMONIUM-SAAL, BERLIN W., STEGLITZER STR. 35, TELEPHON: LÜKOW 6625
Harmonium-Saal, Berlin W., Steglitzer Str. 35, Telephon: Lükow 6625 ( -
Harmoniumhaus, Carl Simon, Berlin W. Steglitzer Str. 35, Telephon: Lützow 6625
No full textHARMONIUMHAUS, CARL SIMON, BERLIN W. STEGLITZER STR. 35, TELEPHON: LÜTZOW 6625
Harmoniumhaus, Carl Simon, Berlin W. Steglitzer Str. 35, Telephon: Lützow 6625 ( -
PHL 6625:A Minor Merger-associated QSO behind NGC 247
Get PDFPHL 6625 is a luminous quasi-stellar object (QSO) at z = 0.3954 located behind the nearby galaxy NGC 247 (z = 0.0005). Hubble Space Telescope observations revealed an arc structure associated with it. We report on spectroscopic observations with the Very Large Telescope and multiwavelength observations from the radio to the X-ray band for the system, suggesting that PHL 6625 and the arc are a close pair of merging galaxies, instead of a strong gravitational lens system. The QSO host galaxy is estimated to be (4-28) × 1010 M and the mass of the companion galaxy is estimated to be M ∗ = (6.8 ± 2.4) × 109 M suggesting that this is a minor merger system. The QSO displays typical broad emission lines, from which a black hole mass of about (2-5) × 108 M and an Eddington ratio of about 0.01-0.05 can be inferred. The system represents an interesting and rare case where a QSO is associated with an ongoing minor merger, analogous to Arp 142.</p
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
Observations of the Sunyaev-Zel'dovich effect in the z=0.78 cluster MS 1137.5+6625
No full textWe have observed the z = 0.78 cluster MS 1137.5+6625 with the Ryle Telescope (RT) at 15 GHz. After subtraction of contaminating radio sources in the field, we find a Sunyaev-Zel'dovich flux decrement of -421 ± 60 μJy on the ≈0.65 kλ baseline of the RT, spatially coincident with the optical and X-ray positions for the cluster core. For a spherical King-profile cluster model, the best fit to our flux measurement has a core radius θC = 20 arcsec, consistent with previous X-ray observations, and a central temperature decrement ΔT = 650 ± 92 μΚ. Using this model, we calculate that the cluster has a gas mass inside a 500 A-165 kpc radius of 2.9 × 1013 ΜM⊙ for an ΩΜ = 1 universe and 1.6 × 1013 Μ⊙ for ΩΜ = 0.3, ΩΛ = 0.7. We compare this model with existing measurements of the total mass of the cluster, based on gravitational lensing, and estimate a gas fraction for MS 1137.5+6625 of ≈8 per cent
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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