1,723,214 research outputs found
J2102+6015: An intriguing radio-loud active galactic nucleus in the early universe
No full textThe powerful high-redshift quasar J2102+6015 (at z = 4.575) may provide useful information for studying supermassive black hole growth, galaxy evolution and feedback in the early Universe. The source has so far been imaged with very-long-baseline interferometry (VLBI) at 2/8 GHz (S/X) bands only, showing complex compact structure. Its total radio spectrum peaks at ∼ 6 GHz in the rest frame. There is no sign of Doppler-boosted jet emission, and the separation of the two major features in its east-west oriented structure spanning ∼ 10 milliarcseconds does not change significantly on a timescale longer than a decade. However, VLBI astrometric monitoring observations suggest quasi-periodic (∼ 3 yr) variation in its absolute position. J2102+6015 is presumably a young radio source with jets misaligned with respect to the line of sight. Here we briefly report on our new high-resolution imaging observations made with the European VLBI Network (EVN) at 5 and 22 GHz frequencies in 2021 June, and give an overview of what is currently known about this peculiar, distant jetted active galactic nucleus.Astrodynamics & Space Mission
Block Card 6015 Lewis Avenue
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: 6015 Lewis Avenue (Toledo, Ohio) | Dwelling | Greenwood Park Area (Toledo, Ohio) | Cape Cod Styl
Block Card 6015 Atwell 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: Ranch houses | 6015 Atwell Road (Toledo, Ohio) | Dwelling | Edgehill Subdivision (Toledo, Ohio) | Trilby Area (Toledo, Ohio)
Block Card 6015 Van Wormer Drive
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: Dwelling | 6015 Van Wormer Drive (Toledo, Ohio) | Ranch houses | Hopewell Hills (Toledo, Ohio) | Greenwood Area (Toledo, Ohio) | West Toledo Area (Toledo, Ohio
J2102+6015: a potential distant multimessenger?
Full text linkWe present and briefly discuss results of several studies of the source J2102+6015 with tentatively defined redshift z = 4.575 which demonstrates unusual properties in imaging and astrometric VLBI observations. Its properties might be considered as indications on the supermassive black hole binary which can be considered as a so far rare example of a high-redshift source of known electromagnetic and, possibly, predictable gravitational wave emissions
Averaging theorem for two point boundary value problems with applications to optimal control
No full textMade available in DSpace on 2021-11-04T16:25:10Z (GMT). No. of bitstreams: 2
TAM378-UILU-ENG-73-6015.pdf: 2245832 bytes, checksum: 2644007268522a0308ef4eb6c939134f (MD5)
license.txt: 4802 bytes, checksum: 58353f9dd6876860dd5221f3d7872a95 (MD5)
Previous issue date: 1973-12AF AFOSR 2284 72 73/1
Modeling scanned acoustic imaging of defects at solid interfaces
No full textLecture Given At Ima Workshop Ong Inverse Problems in Wave Propagation; March 95 U of MinnesotaMade available in DSpace on 2021-11-04T16:28:48Z (GMT). No. of bitstreams: 2
TAM793-UILU-ENG-1995-6015.pdf: 3438218 bytes, checksum: be381bde6e792b2a4ff408b76c787533 (MD5)
license.txt: 4802 bytes, checksum: 58353f9dd6876860dd5221f3d7872a95 (MD5)
Previous issue date: 1995-0
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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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