Search results for "raga"
showing 10 items of 1852 documents
Nel segno di Zeus: su alcuni louteria fittili da Akragas
2018
The study considers some louteria from Agrigento (from the Sanctuary of Zeus Olympios and the so-called Sanctuary of chthonic deities), dated from the sixth to the fifth century BC. In particular we propose a reading of the images that decorate these basins in relation to the sacred contexts in which they were used, paying particular attention to a series of louteria with running quadrigae and winged figures and an example depicting the transport of Achilles’ weapons by the Nereids. Thus symbolic imagerie which refers to the rituals and cults practised in these sacred spaces is reconstructed.
Il santuario di Zeus Olympios nel quadro urbano dell’antica Akragas
2019
The sanctuary of Zeus Olympios at Agrigento has been not perceived in its entirety till now. As a matter of fact, while the temple attracted the scholars’ interest, due to its outstanding features, the buildings surrounding it were referred to residential (W), military (S) and civic (“agora” E/NE) functions. Besides, a sacellum and a pool on the south-eastern side were attributed to the age of Timoleon, later than the main architectural phase. However, the new stratigraphical data allow us to refer all the structures in the southern area to a coherent building program carried out from 480 to 450 BC Starting from this evidence, the paper aims at redefining the whole context, putting it in ur…
Considerazioni sull’approvvigionamento e smaltimento idrico dell’area centro-occidentale della Collina dei Templi di Agrigento in età classica
2020
A partire dalle recenti indagini dell’Università di Palermo nell’area tra i Templi di Zeus e di Eracle ad Agrigento, e dalla revisione condotta da Giovanni Luca Furcas dei sistemi idrici akragantini, si propongono alcune considerazioni su un importante aspetto della vita dei complessi sacri, ancora non adeguatamente approfondito. In particolare si cercherà di cogliere il legame tra l’infrastrutturazione idrica e lo sviluppo diacronico dei santuari nella porzione sud-occidentale della città. The paper examines the water supply and disposal in the central-western part of the Collina dei Templi at Agrigento. Starting from the current investigations by the team of the University of Palermo in t…
Off-line coupling of multidimensional immunoaffinity chromatography and ion mobility spectrometry: A promising partnership.
2015
The extreme specificity of immunoaffinity chromatography (IAC) columns coupled to the high sensitivity of ion mobility spectrometry (IMS) measurements makes this combination really useful for rapid, selective, and sensitive determination of a high variety of analytes in different samples. The capabilities of the IAC-IMS coupling have been highlighted under three different scenarios: (i) multiclass residue analysis using a single IAC column, (ii) multiclass residue analysis using stacked IAC columns, and (iii) isomer analysis. In the first case, the determination of three strobilurin fungicides - azoxystrobin, picoxystrobin, and pyraclostrobin - in water and strawberry juice was considered, …
Optical and ultraviolet pulsed emission from an accreting millisecond pulsar
2021
Ambrosino, F., et al.
Mass Accretion Processes in Young Stellar Objects: Role of Intense Flaring Activity
2014
According to the magnetospheric accretion scenario, young low-mass stars are surrounded by circumstellar disks which they interact with through accretion of mass. The accretion builds up the star to its final mass and is also believed to power the mass outflows, which may in turn have a significant role in removing the excess angular momentum from the star-disk system. Although the process of mass accretion is a critical aspect of star formation, some of its mechanisms are still to be fully understood. On the other hand, strong flaring activity is a common feature of young stellar objects (YSOs). In the Sun, such events give rise to perturbations of the interplanetary medium. Similar but mo…
Linear and cyclic radio k-labelings of trees
2007
International audience; Motivated by problems in radio channel assignments, we consider radio k-labelings of graphs. For a connected graph G and an integer k ≥ 1, a linear radio k-labeling of G is an assignment f of nonnegative integers to the vertices of G such that |f(x)−f(y)| ≥ k+1−dG(x,y), for any two distinct vertices x and y, where dG(x,y) is the distance between x and y in G. A cyclic k-labeling of G is defined analogously by using the cyclic metric on the labels. In both cases, we are interested in minimizing the span of the labeling. The linear (cyclic, respectively) radio k-labeling number of G is the minimum span of a linear (cyclic, respectively) radio k-labeling of G. In this p…
Absolute kinematics of radio-source components in the complete S5 polar cap sample: IV. Proper motions of the radio cores over a decade and spectral …
2016
We have carried out a high-precision astrometric analysis of two very-long-baseline-interferometry (VLBI) epochs of observation of the 13 extragalactic radio sources in the complete S5 polar cap sample. The VLBI epochs span a time baseline of ten years and enable us to achieve precisions in the proper motions of the source cores up to a few micro-arcseconds per year. The observations were performed at 14.4 GHz and 43.1 GHz, and enable us to estimate the frequency core-shifts in a subset of sources, for which the spectral-index distributions can be computed. We study the source-position stability by analysing the changes in the relative positions of fiducial source points (the jet cores) ove…
The gamma-ray emitting radio-loud narrow-line Seyfert 1 galaxy PKS 2004-447 I. The X-ray View
2015
As part of the TANAMI multiwavelength progam, we discuss new X-ray observations of the $\gamma$-ray and radio-loud Narrow Line Seyfert galaxy ($\gamma$-NLS1) PKS 2004-447. The active galaxy is a member of a small sample of radio-loud NLS1s detected in $\gamma$-rays by the Fermi Large Area Telescope. It is the radio-loudest and only southern-hemisphere source in this sample. We present results from our X-ray monitoring program comprised of Swift snapshot observations from 2012 through 2014 and two new X-ray observations with XMM-Newton in 2012. We analyze the X-ray spectrum and variability of this peculiar source using supplementary archival data from 2004 and 2011. The (0.5-10) keV spectrum…
LeMMINGs III. The e-MERLIN legacy survey of the Palomar sample: exploring the origin of nuclear radio emission in active and inactive galaxies throug…
2021
Full list of authors: Baldi, R. D.; Williams, D. R. A.; Beswick, R. J.; McHardy, I.; Dullo, B. T.; Knapen, J. H.; Zanisi, L.; Argo, M. K.; Aalto, S.; Alberdi, A.; Baan, W. A.; Bendo, G. J.; Fenech, D. M.; Green, D. A.; Klöckner, H. -R.; Körding, E.; Maccarone, T. J.; Marcaide, J. M.; Mutie, I.; Panessa, F.; Pérez-Torres, M. A.; Romero-Cañizales, C.; Saikia, D. J.; Saikia, P.; Shankar, F.; Spencer, R. E.; Stevens, I. R.; Uttley, P.; Brinks, E.; Corbel, S.; Martí-Vidal, I.; Mundell, C. G.; Pahari, M.; Ward, M. J.