1,726,031 research outputs found
Block Card 4438 Secor Road
No full textThis image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Bungalow Style | 4438 Secor Road (Toledo, Ohio) | Dwelling | Deveaux Area (Toledo, Ohio
New CO observations and simulations of the NGC 4438/NGC 4435 system - Interaction diagnostics of the Virgo cluster galaxy NGC 4438
No full textNGC 4438 is a highly perturbed spiral with a stellar tidal tail and extraplanar
molecular gas, now very HI deficient, crossing the center of the Virgo cluster
at high speed. Various authors have attributed the perturbed appearance to the
ram pressure of the intracluster medium, the tidal interaction with NGC 4435,
and an ISM-ISM collision between the ISM of NGC 4438 and NGC 4435.
We present new CO observations covering virtually all of NGC 4438 and the center
of NGC 4435 and detailed simulations including all of the above effects.
For the first time CO is detected in NGC 4435.
In NGC 4438 we find double line profiles at distances up to to the west and south-west
and redshifted lines with respect to galactic rotation in the south of the center.
The lack of gas to the North and East coupled with the large gaseous extent to the West and
the redshifted and double line profiles can only be reproduced with a ram pressure wind.
NGC 4438 is most probably on its first passage
through the cluster center and has been stripped of its HI only over the past
100 Myr. While an ISM-ISM collision between NGC 4435 and NGC 4438 may occur,
the effect is not significant compared to ram pressure and tidal forces,
not surprising for the passage of an S0 galaxy kpc from the center
of NGC 4438. We also detect narrow CO lines, in the absence of detected HI, in the
northern tidal arm some 15 kpc from the center of NGC 4438. This can be understood
from the simulations assuming a few percent of the gas is too dense to experience the ram pressure
wind. NGC 4438 has changed greatly over the past 100 Myr due to its plunge through
the center of the Virgo cluster and the interaction with the S0 NGC 4435.
The ram pressure wind has a strong effect which is increased by the interaction with NGC 4435,
bringing gas further from NGC 4438 where the ram pressure strips it away
Southern Pacific (SP) 4438 on "Sunset Limited"
No full textA photograph postcard showing the Southern Pacific (SP) 4438 , 4-8-4 (GS-4), on passenger train No. 2, "Sunset Limited", at Chatsworth, CA, 14 cars, 50 mph. Semi-streamlined oil burner
Book Review: Theatre Theory and Performance: A Critical Interrogation by Siddhartha Biswas; Cambridge Scholars Publishing; 2017; ISBN-13: 978-1-4438-9572-9; ISBN-10: 1-4438-9572-5
No full textBook Review by Abin Chakraborty of Theatre Theory and Performance: A Critical Interrogation by Siddhartha Biswas; Cambridge Scholars Publishing; 2017; ISBN-13: 978-1-4438-9572-9; ISBN-10: 1-4438-9572-
TOI-4438 b: a transiting mini-Neptune amenable to atmospheric characterization
No full textWe report the confirmation and mass determination of a mini-Neptune transiting the M3.5 V star TOI-4438 (G 182-34) every 7.44 days. A transit signal was detected with NASA’s TESS space mission in the sectors 40, 52, and 53. In order to validate the planet TOI-4438 b and to determine the system properties, we combined TESS data with high-precision radial velocity measurements from the CARMENES spectrograph, spanning almost one year, and ground-based transit photometry. We found that TOI-4438 b has a radius of R b = 2.52 ± 0.13 R ⊕ (5% precision), which together with a mass of M b = 5.4 ± 1.1 M ⊕ (20% precision), results in a bulk density of ρ b = 1.85 −0.44 +0.51 g cm −3 (~28% precision), aligning the discovery with a volatile-rich planet. Our interior structure retrieval with a pure water envelope yields aminimum water mass fraction of 46% (1 σ ). TOI-4438 b is a volatile-rich mini-Neptune with likely H/He mixed with molecules, such as water, CO 2 , and CH 4 . The primary star has a J -band magnitude of 9.7, and the planet has a high transmission spectroscopy metric (TSM) of 136 ± 13. Taking into account the relatively warm equilibrium temperature of T eq = 435 ± 15 K, and the low activity level of its host star, TOI-4438 b is one of the most promising mini-Neptunes around an M dwarf for transmission spectroscopy studies
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
TOI-4438 b: a transiting mini-Neptune amenable to atmospheric characterization
Get PDFWe report the confirmation and mass determination of a mini-Neptune transiting the M3.5 V star TOI-4438 (G 182-34) every 7.44 days. A transit signal was detected with NASA’s TESS space mission in the sectors 40, 52, and 53. In order to validate the planet TOI-4438 b and to determine the system properties, we combined TESS data with high-precision radial velocity measurements from the CARMENES spectrograph, spanning almost one year, and ground-based transit photometry. We found that TOI-4438 b has a radius of Rb = 2.52 ± 0.13 R⊕ (5% precision), which together with a mass of Mb = 5.4 ± 1.1 M⊕ (20% precision), results in a bulk density of ρb = 1.85−0.44+0.51 g cm−3 (~28% precision), aligning the discovery with a volatile-rich planet. Our interior structure retrieval with a pure water envelope yields aminimum water mass fraction of 46% (1σ). TOI-4438 b is a volatile-rich mini-Neptune with likely H/He mixed with molecules, such as water, CO2, and CH4. The primary star has a J-band magnitude of 9.7, and the planet has a high transmission spectroscopy metric (TSM) of 136 ± 13. Taking into account the relatively warm equilibrium temperature of Teq = 435 ± 15 K, and the low activity level of its host star, TOI-4438 b is one of the most promising mini-Neptunes around an M dwarf for transmission spectroscopy studies
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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