Ricerc@Sapienza

Churches are an essential part of the historical and architectural heritage of several countries, and various earthquakes have highlighted the significant seismic vulnerability of ancient religious buildings. On August 24, 2016, a seismic sequence started in Central Italy with a magnitude 6.0 event. Nine events with magnitude ≥ 5.0 occurred between that date and January 18, 2017.

Since Lead-cooled Fast Reactors (LFR) have been conceptualized in the frame of Generation IV International Forum (GIF), great interest has focused on the development and testing of new technologies related to Heavy Liquid Metal (HLM) nuclear reactors. In this frame, ENEA developed one of the larger European experimental fleet of experimental facilities aiming at investigating HLM thermal-hydraulics, coolant chemistry control, corrosion behavior for structural materials, and at developing components, instrumentations and innovative systems, supported by experiments and numerical tools.

Sea bass represents one of the main fish products in the market. Most of it comes from farming and is bred in different conditons with respect to the wild fish. Differences may thus be expected. In this study, a proteomic profile of farmed and wild sea bass samples was performed, employing a fractionation strategy where peptide samples were first separated by 2D chromatography. The peptides were finally analyzed by shotgun proteomics workflow combined to tandem MS.

The paper aims at put in evidence as spreading of a better and efficient technology can decrease the extreme consequences of a disaster in scenarios such as avalanches or collapsed buildings. Therefore, it is an opportunity that increases the probability of successful rescue. At the same time involves questions that may have consequences on the same mode of operation of the measuring instruments, practically by hiding or preventing their capability of detection. A review of detection methods belonging to emerging technology shows these aspects along with the questions that arise.

In this contribution, we analyze the forward-scatter cross-section (FS-CS) of three-dimensional (3-D) metallic targets in a forward scatter radar (FSR) system, moving along arbitrary trajectories, in the transition between far- and near-field regions with respect to the receiving antenna. A vector formulation is introduced, together with a simplified approach based on a physical-optics solution of the scattering integral, and validated by means of full-wave numerical evaluations.

Herein we present a super resolution and electromagnetic interference suppression technique based on Maximum Entropy Method and applied to data acquired by the SHAllow RADar (SHARAD) on board the NASA's 2005 Mars Reconnaissance Orbiter (MRO) mission, currently operating on Mars. We show that the proposed algorithm allows to enhance signal-to-noise ratio by several decibels and the range resolution over a factor of three. Subsurface imaging is improved remarkably, allowing additional insights for the scientific community in the interpretation of the SHARAD radar data.

In this work we define a framework for the assessment of the Traffic Matrix (TM) of an Internet Service Provider (ISP) network. The solution, referred to as mrT, i) is completely distributed among network nodes, ii) is based on different Map-Reduce building blocks, iii) and is able to extract the Ingress-Egress nodes traffic relationships starting from raw traces captured on node interfaces. Each network node is able to compute a row of the TM having as input the local trace and low size files sent by other network nodes.

The mono-static Radar Cross Section (RCS) of a commercial Drone (IRIS) has been simulated and measured. For simulations, the electromagnetic CAD Microwave Studio by CST has been used. This software allows to accurately model the drone geometry and material complex permittivity. Measurements have been performed in an anechoic chamber equipped with a network analyzer and a horn antenna. The foreseen applications are the localization of drones in critical scenarios by using both passive and conventional radars.

In this paper, a reconfigurable novel S-band patch antenna system for cubesat satellites is presented. It is shown that, with the same antenna, it is possible to achieve different radiation patterns and polarization, using power divider and digital control phase shifter, thus allowing the use of the designed S-Band patch antenna system for a large number of space mission.

Upper and lower bounds on capacity of low-dense code-domain NOMA were investigated in the context of 5G New Radio (5G-NR), under the worst hypothesis of no channel knowledge at the receiver, i.e. operation without channel state information (CSI). The impact of peculiar features of 5G-NR on capacity bounds of optimum receivers was investigated. The upper bound, defined as the system capacity with perfect CSI, and the lower bound corresponding to a pilot-based communication model, were found.