Maurizio Longo
A5078388590- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Radar Systems and Signal Processing
- IPv6, Mobility, Handover, Networks, Security
- Gamma-ray bursts and supernovae
- Software-Defined Networks and 5G
- Distributed Sensor Networks and Detection Algorithms
- Target Tracking and Data Fusion in Sensor Networks
- Network Security and Intrusion Detection
- Astrophysics and Cosmic Phenomena
- Network Traffic and Congestion Control
- Advanced Image Fusion Techniques
- Advanced Optical Network Technologies
- Wireless Networks and Protocols
- Remote Sensing in Agriculture
- Internet Traffic Analysis and Secure E-voting
- Cosmology and Gravitation Theories
- Remote-Sensing Image Classification
- Indoor and Outdoor Localization Technologies
- Mobile Agent-Based Network Management
- Astrophysical Phenomena and Observations
- Geophysics and Sensor Technology
- Advanced SAR Imaging Techniques
- Advanced Authentication Protocols Security
- Particle Detector Development and Performance
University of Salerno
2014-2023
Benchmark Research (United States)
2019
CoRiTeL
2017
Consortium for Research in Automatic and Telecommunications
2017
Colorado State University
2013-2016
Michigan State University
2014
Michigan Technological University
2012
Université Paris Cité
1990-2012
Sorbonne Université
1990-2012
Institut Cochin
2012
A statistical characterisation of clutter as a complex random process is needed in the design optimum detection schemes. The paper considers modelling spherically invariant (SIRP), namely assuming that its PDFs can be expressed non-negative definite quadratic forms, generalisation Gaussian process. Relevant properties SIRPs are summarised, and shown to comply with basic requirements such circular symmetry joint PDF in-quadrature components or, equivalently, uniformity phase distribution....
As the undesired echo from a radar environment (clutter) is often not Rayleigh-distributed, problems arise in specifying clutter as non-Gaussian random process and computer-generating realisations of for simulation purposes. The paper shows that modelling compound Gaussian or spherically invariant allows complete specification suitable use design. It also lends itself readily to computer procedures. Specific procedures generating with assigned correlation properties K Weibull amplitude...
In a decentralized hypothesis testing network, several peripheral nodes observe an environment and communicate their observations to central node for the final decision. The presence of capacity constraints introduces theoretical practical problems. following problem is addressed: given that encoders satisfy these are scalar quantizers, how should they be designed in order test performed on output indices most powerful? scheme called cooperative design-separate encoding since quantizers...
Background. The capsular polysaccharide (CPS) is an important virulence factor and a vaccine target of the major neonatal pathogen group B Streptococcus (GBS). Population studies revealed no strong correlation between CPS type multilocus sequence typing (MLST) cluster, with remarkable exception worldwide spread hypervirulent GBS CC17, which were all until recently III.
The High-Altitude Water Cherenkov (HAWC) Observatory is sensitive to gamma rays and charged cosmic at TeV energies.The detector still under construction, but data acquisition with the partially deployed started in 2013.An analysis of cosmic-ray arrival direction distribution based on 4.9 × 10 events recorded between June 2013 February 2014 shows anisotropy -4 level angular scales about • .The HAWC sky map exhibits three regions significantly enhanced flux; two these were first reported by...
The Virgo gravitational wave detector is an interferometer with 3 km long arms in construction near Pisa to be commissioned the year 2000. has been designed achieve a strain sensitivity of few times at 200 Hz. A large effort gone into conception mirror suspension system, which expected reduce noise level 10 signals and main sources are briefly discussed; choices made illustrated together present status experiment.
The detection of signals with unknown parameters in correlated K-distributed noise, using the generalised Neyman-Pearson strategy is considered. a priori uncertainty on signal removed by performing maximum likelihood estimate parameters. resulting receivers can be regarded as generalisation conventional detector, but for zero-memory nonlinearity depending amplitude probability density function noise well number integrated pulses. It shown that performance uncorrelated observations unaffected...
The paper deals with the design and performance evaluation of optimum suboptimum multistatic radar receivers. Several detection schemes are considered according to possible models for wanted signal: completely known; random phase; Rayleigh amplitude one-dominant-plus-Rayleigh phase. inherent complexity structure may be alleviated by resorting a simplified scheme suggested here which envisages number peripheral decisions in as many conventional receivers, followed central decision based on an...
The High Altitude Water Cherenkov (HAWC) observatory is a wide field-of-view detector sensitive to gamma rays of 100 GeV few hundred TeV. Located in central Mexico at 19\ifmmode^\circ\else\textdegree\fi{} North latitude and 4100 m above sea level, HAWC will observe cosmic with an array water detectors. full scheduled be operational Spring 2015. In this paper, we study the sensitivity gamma-ray signatures high-mass (multi-TeV) dark matter annihilation. diverse searches for annihilation,...
Distributed Denial-of-Service (DDoS) attacks are usually launched through the botnet, an “army” of compromised nodes hidden in network. Inferential tools for DDoS mitigation should accordingly enable early and reliable discrimination normal users from ones. Unfortunately, recent emergence performed at application layer has multiplied number possibilities that a botnet can exploit to conceal its malicious activities. New challenges arise, which cannot be addressed by simply borrowing have...
The authors consider procedures for constant false alarm rate in lognormal clutter, accounting variations of both the scale and a shape parameter clutter. Adaptivity to parameters is obtained through biparametric estimation based on sliding window surrounding radar cell under test. Some exploiting best linear unbiased (BLUE) are presented compared previous procedure called Log-t, which uses maximum likelihood (MLE). comparison carried homogeneous clutter environment instances inhomogeneous...
The first limits on the prompt emission from long gamma-ray burst (GRB) 130427A in $>100\nobreakspace\rm{GeV}$ energy band are reported. GRB was most powerful ever detected with a redshift $z\lesssim0.5$ and featured longest lasting above $100\nobreakspace\rm{MeV}$. spectrum extends at least up to $95\nobreakspace\rm{GeV}$, clearly range observable by High Altitude Water Cherenkov (HAWC) Gamma-ray Observatory, new extensive air shower detector currently under construction central Mexico....
A survey of the inner Galaxy region Galactic longitude l in [+15, +50] degree and latitude b [-4,+4] is performed using one-third High Altitude Water Cherenkov (HAWC) Observatory operated during its construction phase. To address ambiguities arising from unresolved sources data, we use a maximum likelihood technique to identify point source candidates. Ten candidate are identified this analysis. Eight these associated with known TeV but not all have differential fluxes compatible previous...
The authors deal with constant false alarm rate (CFAR) procedures against nonstationary clutter, modeled as a Weibull distributed process whose scale parameter alpha and shape beta are both variable. It is shown that conventional CFAR procedures, which compensate only for , degrade intolerably deviates from =2, namely, the Rayleigh distributional assumption violated. A biparametric procedure to be suited such situations. introduce logarithmic transformation reduce probability density...
A recurrent concern in cloud detection approaches is the high misclassification rate for pixels close to edges. We tackle this problem by introducing a novel penalty term within classical maximum posteriori probability-Markov random field (MAP-MRF) approach. To improve classification rate, such term, which we suggest two different functional forms, accounts predictable motion of volumes across images. Two mass tracking techniques are proposed. The first one an effective and efficient...
The detection of encrypted real-time traffic, both streaming and conversational, is an increasingly important issue for agencies in charge lawful interception. Aside from well established technologies used communication (e.g. Skype, Facetime, Lync etc.) a new one recently spreading: Web Real-Time Communication (WebRTC), which, with the support robust encryption method such as DTLS, offers capabilities voice video without need installing specific application but using common browser, like...
Nowadays, network and telecommunication operators require flexible dynamic models to deploy new services in a fast, reliable cost saving way. The Service Function Chaining (SFC) design is particularly suited meet such needs, especially conjunction with the Network Virtualization (NFV) paradigm that adds noteworthy elasticity during SFC deployment phase. Accordingly, realized by means of composition Virtualized Functions (VNFs) aimed at providing some specific services. We consider, from an...
The paper deals with the detection of signals unknown parameters in impulsive noise, modeled as a spherically symmetric random process. proposed model subsumes several interesting families noise amplitude distributions: generalized Cauchy, Laplace, Gaussian, contaminated normal. It also allows handling case correlated by whitening approach. maximum likelihood decision strategy is adopted, resulting canonical detector, which independent distribution noise. A general method for performance...
The availability of remotely sensed image sequences characterized by both spatial and temporal high resolution is crucial in many applications, ranging from agriculture to Earth surface hazard monitoring. To date, presenting such desirable characteristics domains are not directly obtainable a single device thus viable solution represented the joint use multisensor information. In this work, we propose solution, based on Bayesian sequential estimation, for fusing two complementary features....