Ricerc@Sapienza

Conserving threatened species requires identifying where across their range they are being impacted by threats, yet this remains unresolved across most of Earth. Here, we present a global analysis of cumulative human impacts on threatened species by using a spatial framework that jointly considers the co-occurrence of eight threatening processes and the distribution of 5,457 terrestrial vertebrates. We show that impacts to species are widespread, occurring across 84% of Earth’s surface, and identify hotspots of impacted species richness and coolspots of unimpacted species richness.

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.

The paper examines the different perceptions of
risk associated with anesthesia systems from the viewpoint of the
product manufacturer and the caregiver. Only little research has
been done with regard to the impact of perception of risk on
patient safety in anesthesia. The role of the manufacturer in
mitigating the perception of risk will be central to the work. Risk
will be examined as the probability of negative occurrences based
on the Medical Device Reportable (MDR) events and how the

The paper examines the different perceptions of risk associated with anesthesia systems from the viewpoint of the product manufacturer and the caregiver. Only a little research has been done with regard to the impact of perception of risk on patient safety in anesthesia. The role of the manufacturer in mitigating the perception of risk will be central for the work.

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.

Despite the efforts made, the number of accidents has not significantly decreased in the construction industry. The main reasons can be found in the peculiarities of working activities in this sector, where hazard analysis and safety management are more difficult than in other industries. To deal with these problems, a comprehensive approach for hazard analysis is needed, focusing on the activities in which a working task is articulated since they are characterized by different types of hazards and thus risk levels.