Neutrinos from Gamma Ray Bursts in the IceCube and ARA Era

In this review I discuss the ultra-high energy neutrinos (UHEN) originated from Cosmic-Rays propogation (GZK neutrinos) and from Gamma Ray Bursts (GRBs), and discuss their detectability in kilometers scale detectors like ARA and IceCube. While GZK neutrinos are expected from cosmic ray interactions on the CMB, the GRB neutrinos depend on the physics inside the sources. GRBs are predicted to emit UHEN in the prompt and in the later 'after-glow' phase. I discuss the constraints on the hadronic component of GRBs derived from the search of four years of IceCube data for a prompt neutrino fux from gamma-ray bursts (GRBs) and more in general I present the results of the search for high-energy neutrinos interacting within the IceCube detector between 2010 and 2013.Comment: Accepted for publication in Journal of High Energy Astrophysics. arXiv admin note: text overlap with arXiv:1407.015

The rate and luminosity function of Short GRBs

We compare the luminosity function and rate inferred from the BATSE short hard bursts (SHBs) peak flux distribution with the redshift and luminosity distributions of SHBs observed by Swift/HETE II. The Swift/HETE II SHB sample is incompatible with SHB population that follows the star formation rate. However, it is compatible with a distribution of delay times after the SFR. This would be the case if SHBs are associated with binary neutron star mergers. The implied SHB rates that we find range from \sim 8 to \sim 30h_{70}^3Gpc^{-3}yr^{-1}. This rate is a much higher than what was previously estimated and, when beaming is taken into account, it is comparable to the rate of neutron star mergers estimated from statistics of binary pulsars. If GRBs are produced in mergers the implied rate practically guarantees detection by LIGO II and possibly even by LIGO I, if we are lucky. Our analysis, which is based on observed short hard burst is limited to bursts with luminosities above 10^{49}erg/sec. Weaker bursts may exist but if so they are hardly detected by BATSE or Swift and hence their rate is very weakly constrained by current observations. Thus the rate of mergers that lead to a detection of a gravitational radiation signal might be even higher.Comment: Proceedings of the conference on "Gamma Ray Bursts in the Swift Era", November 29,-December 2, Washington, D

Solid image extraction from LIDAR point clouds

In laser scanner architectural surveying it is necessary to extract orthogonal projections from the tridimensional model, plans, elevations and cross sections. The paper presents the workflow of architectural drawings production from laser scans, focusing on the orthogonal projection of the point cloud on solid images, in order to avoid the time consuming surface modeling, when it is not strictly necessary. The proposed procedures have been implemented in fortran90 and included in the VELOCE software package, then tested and applied to the case study of the San Pietro church in Porto Venere (SP), integrating the architectural surveying with an existing bathymetric and coastal surveyin

Piensa globalmente, actúa localmente: mapeo de la cultura libre en un sistema mediático híbrido

From the nineties, the Internet has been providing new political hybrid action forms. At the same time, some communities make a disruptive use of technologies aiming to subvert network power relationships at the current capitalized and centralized cyberspace. Addressing a collaborative mapping, we identified 290 free culture communities in Spain. Their characteristics suggest the relevance of offline spaces and local areas to deliberate, propose and perform political participation towards a neutral, centralised and free Internet.Desde los años noventa, el ciberespacio ha propuesto formas acción política híbrida. Asimismo, algunos colectivos realizan un uso disruptivo de las tecnologías para subvertir las relaciones de poder en la Red. Mediante un mapeo colaborativo, identificamos 290 grupos relacionados con la cultura libre en España. Sus características sugieren la relevancia de los espacios offline y de los territorios locales para deliberar y activarse políticamente a favor de un Internet libre