1,725,651 research outputs found
Santa Fe (ATSF) 3139
A photograph print showing Santa Fe 3139, 2-8-2, on freight train, Nelson, AZ
Spectral index of the H2O-maser-emitting planetary nebula IRAS 17347-3139
We present radio-continuum observations of the planetary nebula (PN) IRAS 17347-3139 (one of the only two known to harbour water maser emission), made to derive its spectral index and the turnover frequency of the emission. The spectrum of the source rises in the whole frequency range sampled, from 2.4 to 24.9 GHz, although the spectral index seems to decrease at the highest frequencies (0.79 ± 0.04 between 4.3 and 8.9 GHz, and 0.64 ± 0.06 between 16.1 and 24.9 GHz). This suggests a turnover frequency of around 20 GHz (which is unusual among PNe, whose radio emission usually becomes optically thin at frequencies <10 GHz), and a relatively high emission measure (1.5 × 10 9 cm -6 pc). The radio-continuum emission has increased by a factor of ≃1.26 at 8.4 GHz in 13 yr, which can be explained as expansion of the ionized region by a factor of ≃1.12 in radius with a dynamical age of ≃120 yr and at an expansion velocity of ≃5-40km s -1. These radio-continuum characteristics, together with the presence of water maser emission and a strong optical extinction, suggest that IRAS 17347-3139 is one of the youngest PNe known, with a relatively massive progenitor star. © 2005 RAS
Block Card 3139 Woodley Court
This 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: Dwelling | 3139 Woodley Court (Toledo, Ohio) | Ranch houses | Trail Acres (Toledo, Ohio) | Westgate Area (Toledo, Ohio) | West Toledo area (Toledo, Ohio
Block Card 3139 Radford Avenue
This 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: Ranch houses | 3139 Radford Avenue (Toledo, Ohio) | Dwelling | Replat of Vanderbilt Terrace (Toledo, Ohio) | South Toledo Area (Toledo, Ohio
Block Card 3139 South Avenue
This 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: Ranch houses | 3139 South Avenue (Toledo, Ohio) | dwelling | Weston Gardens 3rd Extension (Toledo, Ohio) | South Toledo area (Toledo, Ohio
Taylor, Richard, b. 1941 (SC 3139)
Finding aid only for Manuscripts Small Collection 3139. Handwritten note card from Richard Taylor, Frankfort, Kentucky, to James Baker Hall thanking him for arranging a recent event honoring Larkspur Press of Monterey, Kentucky. He also refers to the work of the operator of the Press, Gray Zeitz
Linked collectors and determiners for: A new troglobitic species of Metopioxys (Staphylinidae: Pselaphinae) from Brazilian iron ore caves.
Natural history specimen data linked to collectors and determiners held within, "A new troglobitic species of Metopioxys (Staphylinidae: Pselaphinae) from Brazilian iron ore caves". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/c1d3a5fe-3139-4e2a-9c5d-caacd6ddbce2">https://bionomia.net/dataset/c1d3a5fe-3139-4e2a-9c5d-caacd6ddbce2</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/c1d3a5fe-3139-4e2a-9c5d-caacd6ddbce2">https://gbif.org/dataset/c1d3a5fe-3139-4e2a-9c5d-caacd6ddbce2</a>. Formatted as a Frictionless Data package
Reading Vergil’s Aeneid: An interpretative guide, ed. Ch. Perkell, Oklahoma, 1999, 353 pp. ISBN 0-8061-3139-X
Review: Reading Vergil’s Aeneid: An interpretative guide, ed. Ch. Perkell, Oklahoma, 1999, 353 pp. ISBN 0-8061-3139-XReseña de Reading Vergil’s Aeneid: An interpretative guide, ed. Ch. Perkell, Oklahoma, 1999, 353 pp. ISBN 0-8061-3139-
Going Beyond Counting First Authors in Author Co-citation Analysis
The 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
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