A5055208044- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- High-pressure geophysics and materials
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Geophysics and Gravity Measurements
- Particle physics theoretical and experimental studies
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Seismic Waves and Analysis
- Blind Source Separation Techniques
- Magnetic confinement fusion research
- Image and Signal Denoising Methods
- Radio Astronomy Observations and Technology
- Advanced Frequency and Time Standards
- Seismology and Earthquake Studies
- Speech and Audio Processing
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Chromodynamics and Particle Interactions
- Simulation Techniques and Applications
- Seismic Imaging and Inversion Techniques
- Parallel Computing and Optimization Techniques
- Atomic and Subatomic Physics Research
University of Trieste
1989-2024
University of Udine
2002-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2003-2024
Abstract The Advanced Virgo detector has contributed with its data to the rapid growth of number detected GW signals in past few years, alongside two LIGO instruments. First during last month Observation Run 2 (O2) August 2017 (with, most notably, compact binary mergers GW170814 and GW170817), then full 3 (O3): an 11 months taking period, between April 2019 March 2020, that led addition 79 events catalog transient sources maintained by LIGO, now KAGRA. These discoveries manifold exploitation...
In this Letter, we present the design and performance of frequency-dependent squeezed vacuum source that will be used for broadband quantum noise reduction Advanced Virgo Plus gravitational-wave detector in upcoming observation run. The field is generated by a phase rotation frequency-independent state through 285 m long, high-finesse, near-detuned optical resonator. With about 8.5 dB squeezing, up to 5.6 suppression has been measured at high frequency while close filter cavity resonance...
Sources of geophysical noise (such as wind, sea waves and earthquakes) or anthropogenic impact ground-based gravitational-wave interferometric detectors, causing transient sensitivity worsening gaps in data taking. During the one year-long third Observing Run (O3: from April 01, 2019 to March 27, 2020), Virgo Collaboration collected a statistically significant dataset, used this article study response detector variety environmental conditions. We correlated parameters global performance,...
Detector characterization and data quality studies -- collectively referred to as {\em DetChar} activities in this article are paramount the scientific exploitation of joint dataset collected by LIGO-Virgo-KAGRA global network ground-based gravitational-wave (GW) detectors. They take place during each phase operation instruments (upgrade, tuning optimization, taking), required at all steps dataflow (from acquisition final list GW events) operate various latencies near real-time vet public...
Single channel source separation of seismic signals is an appealing but difficult problem. In this paper, we introduce a semi-blind single-channel method to enhance the components volcanic origin. method, decomposition scheme addressed as Sparse Non-negative Matrix Factorization (NMF) time-frequency representation single vertical channel. As case study present application using data recorded at Villarrica volcano, Chile, one most active in southern Andes. The analysed dataset strongly...
Independent Component Analysis (ICA) is an emerging new technique in the blind identification of signals recorded a variety different fields. ICA tries to find most statistically independent sources from observable random vector, with only restriction that all but at one are non-Gaussian; no other priori information on and mixing dynamic system needed. The applications these techniques analysis volcanic time series relatively few date. In this paper we show suitable separate source component...
Within the year 2007, MAGIC will be upgraded to a two telescope system at La Palma. Its main goal is improve sensitivity in stereoscopic/coincident operational mode. At same time it lower analysis threshold of currently running single telescope. Results from Monte Carlo simulations this discussed. A comparison with performance one shown terms sensitivity, angular resolution and energy resolution.
Abstract The gravitational wave detector Advanced Virgo+ is currently in the commissioning phase view of fourth Observing Run (O4). major upgrades with respect to Virgo configuration are implementation an additional recycling cavity, Signal Recycling cavity (SRC), at output interferometer broaden sensitivity band and Frequency Dependent Squeezing (FDS) reduce quantum noise all frequencies. main difference + LIGO detectors presence marginally stable cavities, cavities present detectors, which...
This paper presents the simulation of GLAST high energy gamma-ray telescope. The package, written in C++, is based on Geant4 toolkit, and it integrated into a general framework used to process events. A detailed electronic signals inside Silicon detectors has been provided for particle tracking, which handled by dedicated software. unique repository geometrical description detector realized using XML language C++ library access this information designed implemented.
Research Article| September 01, 2014 Filtering Wind in Infrasound Data by Non‐Negative Matrix Factorization Roberto Carniel; Carniel aLaboratorio di misure e trattamento dei segnali, DICA, Università Udine, Via delle Scienze, 206, I‐33100 Italyroberto.carniel@uniud.it Search for other works this author on: GSW Google Scholar Giuseppe Cabras; Cabras bDipartimento Chimica, Fisica Ambiente, Italy Mie Ichihara; Ichihara cEarthquake Institute, The University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku,...
In this paper, we focus on the signal-to-noise ratio (SNR) improvement in single channel audio recordings. Many approaches have been reported literature. The most popular method, with many variants, is Short Time Spectral Attenuation (STSA). Although method reduces noise and improves SNR, it mostly tends to introduce signal distortion a perceptually annoying residual usually called musical noise. paper investigate use of Non-negative Matrix Factorization (NMF) as an alternative STSA for...
The MAGIC Project: Contributions to ICRC 2007, Merida, Mexico. Contents pages for the Contribution on behalf of Collaboration 30th that took place in July 2007 contents are html form with clickable links papers exist Astrophysics archive. We hope this will make it easier access output conference a systematic way. Comments how useful is/ could be improved should sent michela.demaria@iuav.it.
We studied the application of Pseudo-Zernike features as image parameters (instead Hillas parameters) for discrimination between images produced by atmospheric electromagnetic showers caused gamma-rays and ones hadrons in MAGIC Experiment. used a Support Vector Machine classification algorithm with computed parameters. implemented on FPGA board kernel function SVM to build third level trigger gamma-hadron separation task