775 research outputs found
Recommended from our members
Echoes of counterculture in Stefano Benni's humour
No full textStefano Benni’s first novel, Terra! (1983) - a sci-fi spoof and a satire of contemporary life - set the trend for his subsequent fiction. Blending fantasy, pop culture, literary pastiche and current affairs, Benni’s political and social satires have been nationally and internationally successful. Less known yet crucial to the understanding of his fiction as well as to his use of humour are his earlier writings and their engagement with social and political issues. This study aims to show that the roots of Benni’s humour, with its coarse language, puns, pastiche and mocking tone, are to be found in the student spirit and political protest of the 1970s. Adopting an interdisciplinary approach which draws on social history as well as structuralist methods of literary analysis, it argues that the subtle rhetorical strategies employed, as well as the strong underlying political intent, militate against the dismissive label of ‘popular fiction writer’ attached to him by some critics
Gamma-astronomy in the UHE region by using an array of muon detectors
No full textAbstract. The future gamma astronomy experiments
should face the gamma sources search in a
wide energy range: from approximately 100 GeV up
to tens of TeV. To observe a statistically significant
sample of photons with energies above tens TeV, large
ground-based detectors are needed. The primary
gamma-rays are measured by detecting the extensive
air showers (EASs) produced by their interaction
with the atmosphere. In this paper the contribution
of the measurement of the muon content in EAS
detectors operating to search gamma sources at the
energy of tens TeV is presented. By using Monte
Carlo methods, a muon detector, distributed over an
area of about 1 km2, was simulated. The sensitivity of
this apparatus is discussed; the minimum measurable
fluence is also presented
Energy spectrum of cosmic ray protons and helium nuclei measured by the ARGO-YBJ experiment
No full textThe ARGO-YBJ experiment is a full-coverage air shower detector operating at the Yangbajing International Cosmic Ray Observatory (Tibet, PR China, 4300 m a.s.l.). The detector was in stable data taking in its full configuration from November 2007 to February 2013. More than 5×10115×1011 events have been collected and reconstructed. Due to its characteristics (full-coverage, high segmentation, high altitude operation) the ARGO-YBJ experiment is able to investigate the cosmic ray energy spectrum in a wide energy range and offer the possibility of measuring the cosmic ray light component spectrum down to the TeV region, where direct balloon-borne measurements are available. In this work we present the measurement of the proton and helium spectra in the energy range 1–300 TeV by using a large data sample collected between January 2008 and December 2011
Cosmic Ray measurements in the region 1-100 TeV: combined proton and helium spectrum
No full textThe ARGO-YBJ experiment, located in the Yangbajing Cosmic Ray observatory (4300 m a.s.l. Tibet, P.R. China),
detects Extensive Air Showers in a wide energy range by means of a full-coverage detector based on RPC chambers.
In this work recent results about the measurement of the combined proton and helium spectrum in the energy range
5-250 TeV are presented. The ARGO-YBJ results are therefore the first indirect measurements at these energies with
ground-based detectors. The measured spectrum can be compared to direct measurements in the same energy region.
The data show a good agreement with recent direct measurements and suggest that the spectrum is harder than in the
low energy reg
The all-particle spectrum measured by means of a Bayesian unfolding technique in the energy range 1-100 TeV with the ARGO-YBJ data
No full textAbstract. The ARGO-YBJ experiment detects the
charged component of Extensive Air Showers by
means of a full-coverage detector installed at a high
altitude location (4300 m a.s.l. in Tibet, P.R. China).
The detector consists of a central carpet of about
5800 m2 with an active area of 93% surrounded
by a guard ring with a lower sampling density.
In this work some runs taken in the 2008 year
were analyzed, the measurement of the all-particle
spectrum in the energy region 1-100 TeV is discussed.
Data were analyzed by using a Bayesian unfolding
procedure
Cosmic Ray elemental composition study by using the lateral particle density distribution in showers induced by primaries in the 1 − 104 TeV energy range
No full textAbstract. Important information on the origin
of high-energy Cosmic Rays can be obtained by
studying their composition. In this paper a study
on the elemental Cosmic Ray composition by using
the lateral particle density distributions in Extensive
Air Showers (EAS) is presented. EASs induced by
protons, He nuclei, CNO group, NeMgSi group and
Fe nuclei were simulated in the energy range 1-10000
TeV. The lateral particle density distribution was
estimated, an unfolding procedure to separate the
different mass groups is discussed
The light component spectrum measured by the ARGO-YBJ experiment in the energy region 1–300 TeV.
No full textThe ARGO-YBJ experiment is taking data at the Yangbajing International Cosmic Rays Observatory located
at an altitude of about 4300 m a.s.l. (Tibet, P.R. China). The detector consists of an EAS array made of a full coverage
RPCs carpet. In this paper the light component cosmic ray spectrum in the energy region 1–300 TeV is presented, these
results allow the comparison between satellite and balloon–borne data with ground based measurements. The measured
intensities obtained in this work are in good agreement with the recent CREAM measurements and show a spectrum
flatter than the low energy measurement
The observation of the light component spectrum in the 5–250 TeV region by the ARGO-YBJ experiment
No full textThe ARGO-YBJ experiment detects extensive air showers by means of a full coverage detector located at the YBJ International Cosmic Ray Observatory in Yangbajing (4300 m a.s.1, Tibet, P.R. China). In this work the light component spectrum in the energy region between 5 - 250 TeV is presented. The results are compared with data provided by the CREAM experiment in the same energy region. The ARGO-YBJ data are fully consistent with the CREAM data. This analysis is based on a Bayesian procedure
Gamma-hadron discrimination in extensive air showers using a neural network
No full textA neural algorithm was developed to separate electromagnetic and hadronic showers detected with an air shower array. The requirements on the detector performance are very general, so that the results of the calculation call be applied to a wide set of detectors, actually operating or planned for the future. More then 700000 showers were generated using the Corsika package and were propagated through an ideal pixel-like detector. The peculiarities of each class of showers are presented in detail and it is shown how the neural net architecture is structured around them. The neural net performances were studied for different sets of simulated data. The physics relevance of the gamma-hadron separation is also discussed. (C) 2001 Elsevier Science B.V. All rights reserved
An object oriented approach for the data management of the ARGO-YBJ experiment
No full textThe Argo-YBJ detector will be able to continuously
monitor the sky with a low threshold, an high duty
cycle and a large solid angle. The experimental and Monte
Carlo data flow will be some orders of magnitude larger than
the data flow of the past experiments and it requires a strong
computational effort to face out the management, the reconstruction
and the distribution of the data for the end user analysis.
In the paper an Object Oriented framework for the data
management based on Object Oriented Database (Objectivity)
and on the ROOT package will be presented. Hundreds
thousands events were stored in order to test the performance
and the flexibility of the model
- …
