1,736,521 research outputs found
G-1156-2015-E Actas de Expedición
No full textG-1156-2015-E Actas de ExpediciónG-1156-2015-E Actas de ExpediciónPD
Periodic radio variabilities of the blazar 1156+295: harmonic oscillations
No full text(Quasi)-periodic oscillations of the radio luminosity of a typical blazar 1156+295 were analysed to investigate the dynamic processes associated with the central engine of the active galactic nucleus. Three numerical techniques, the Lomb-Scargle periodogram, the Weighted Wavelet Z-transform and the improved Phase Dispersion Minimization, were used to search for candidate periodicities in the radio light curves of 1156+295 at 14.5, 8.0 and 4.8 GHz. The results of these methods are consistent with the detection of four periodic components with characteristic periods of similar to 1.7 (P-4), similar to 2.4 (P-3), similar to 3.4 (P-2) and similar to 7.5 yr (P-1), which suggest a harmonic relationship in frequency of 4: 3: 2: 1 with f(1) as the fundamental frequency. Except for the fact that P-1 persistently shows in the whole time span, the three others appear intermittent and are only prominent during certain time ranges. The second harmonic mode (P-2) is most powerful at all three observing frequency bands. The multiplicity and harmonic relation of the periodicities in 1156+295 reconfirms that global p-mode oscillations of the accretion disc are coupled to the jet. The oscillation of the disc is likely driven by Kelvin-Helmholtz instabilities in the inner edge of the accretion disc
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
Publikation: Niederösterreichisches Urkundenbuch, Dritter Band (1156–1182)
No full textIn der achten Unterreihe der „Publikationen des Instituts für Österreichische Geschichtsforschung“ ist soeben erschienen: Niederösterreichisches Urkundenbuch, 3: (1156–1182), hg. von Roman ZEHETMAYER–Markus GNEISS–Sonja LESSACHER–Günter MARIAN–Christina MOCHTY-WELTIN–Dagmar WELTIN (Publikationen des Instituts für Österreichische Geschichtsforschung VIII/3, St. Pölten 2017). Der Band enthält die Niederösterreich betreffenden Urkunden von 1156 bis 1182, die nicht nur kritisch ediert, sondern ..
Demographic characteristics of the sample (n = 1156).
No full textDemographic characteristics of the sample (n = 1156).</p
Espunzioni e congetture antiche ad Euripide, Ecuba (vv. 1155-1156)
Get PDFL'articolo mostra che gli scoli ad Euripide Ecuba 1156 ci attestano l'esistenza di una espunzione antica del v. 1155, e di una probabile congettura antica al v. 1156; l'espunzione non viene menzionata negli apparati delle edizioni più recenti
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