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View article: Temperature-Dependent Elastic and Damping Properties of Basalt and Glass Fabric Reinforced Composites: A Comparative Study
Temperature-Dependent Elastic and Damping Properties of Basalt and Glass Fabric Reinforced Composites: A Comparative Study Open
Fiber-reinforced composite materials exhibit orthotropic behavior, characterized by complex orthotropic engineering constants such as Young’s modulus, Poisson’s ratio, and shear modulus. It is widely recognized that basalt fibers possess s…
View article: Thermo-Mechanical Identification of Orthotropic Engineering Constants of Composites Using an Extended Non-Destructive Impulse Excitation Technique
Thermo-Mechanical Identification of Orthotropic Engineering Constants of Composites Using an Extended Non-Destructive Impulse Excitation Technique Open
Composite materials are increasingly used in various vehicles and construction parts, necessitating a comprehensive understanding of their behavior under varying thermal conditions. Measuring the thermo-mechanical properties with tradition…
View article: Thermo-Mechanical Identification of Orthotropic Engineering Constants of Composites Using an Extended Non-Destructive Impulse Excitation Technique
Thermo-Mechanical Identification of Orthotropic Engineering Constants of Composites Using an Extended Non-Destructive Impulse Excitation Technique Open
Composite materials are increasingly used in various vehicles and construction parts, necessitating a comprehensive understanding of their behavior under varying thermal conditions. Measuring the thermo-mechanical properties with tradition…
View article: Separating source-intrinsic and Lorentz invariance violation induced delays in the very high-energy emission of blazar flares
Separating source-intrinsic and Lorentz invariance violation induced delays in the very high-energy emission of blazar flares Open
Aims. The aim of the present study is to explore how to disentangle energy-dependent time delays due to a possible Lorentz invariance violation (LIV) at Planck scale from intrinsic delays expected in standard blazar flares. Methods. We fir…
View article: Identification of the optical emission detected by <i>Gaia</i> with radio structures in parsec-scale active galactic nucleus jets
Identification of the optical emission detected by <i>Gaia</i> with radio structures in parsec-scale active galactic nucleus jets Open
Aims. We investigated the location of the optical emission with respect to the parsec-scale radio structure and attempted to identify whether the optical centroid is coincident with the radio core or a radio component of the jet. Methods. …
View article: Update on the characterisation of the pGCT, a prototype of 4m dual-mirror Cherenkov Telescope
Update on the characterisation of the pGCT, a prototype of 4m dual-mirror Cherenkov Telescope Open
The Gamma-ray Cherenkov Telescope prototype (pGCT) is a prototype of an Imaging Atmospheric Cherenkov Telescope, developed as Small-Sized Telescope (SST) of 4m during the preparation of the Cherenkov Telescope Array (CTA). Based on a Schwa…
View article: Southern African Large Telescope Spectroscopy of BL Lacs for the CTA project
Southern African Large Telescope Spectroscopy of BL Lacs for the CTA project Open
In the last two decades, very-high-energy gamma-ray astronomy has reached maturity: over 200 sources have been detected, both Galactic and extragalactic, by ground-based experiments. At present, Active Galactic Nuclei (AGN) make up about 4…
View article: Probing Dark Matter and Fundamental Physics with the Cherenkov Telescope Array
Probing Dark Matter and Fundamental Physics with the Cherenkov Telescope Array Open
Astrophysical observations provide strong evidence that more than 80% of all matter in the Universe is in the form of dark matter (DM). Two leading candidates of particles beyond the Standard Model that could constitute all or a fraction o…
View article: Connecting steady emission and very high energy flaring states in blazars: the case of Mrk 421
Connecting steady emission and very high energy flaring states in blazars: the case of Mrk 421 Open
Various attempts have been made in the literature at describing the origin and the physical mechanisms behind flaring events in blazars with radiative emission models, but detailed properties of multiwavelength (MWL) light curves still rem…
View article: Probing extreme environments with the Cherenkov Telescope Array
Probing extreme environments with the Cherenkov Telescope Array Open
The physics of the non-thermal Universe provides information on the acceleration mechanisms in extreme environments, such as black holes and relativistic jets, neutron stars, supernovae or clusters of galaxies. In the presence of magnetic …
View article: Prediction and Measurement of the Damping Ratios of Laminated Polymer Composite Plates
Prediction and Measurement of the Damping Ratios of Laminated Polymer Composite Plates Open
Laminated composites materials are mostly used in dynamically loaded structures. The design of these structures with finite element packages is focused on vibrations, elastic deformations and failure control. Damping is often neglected bec…
View article: Assessment of the GCT prototype's optical system implementation and other key performances for the Cherenkov Telescope Array
Assessment of the GCT prototype's optical system implementation and other key performances for the Cherenkov Telescope Array Open
The Cherenkov Telescope Array (CTA) project, led by an international collaboration of institutes, aims to create the world's largest next generation observatory for Very High Energy (VHE) gamma-ray astronomy. It will be devoted to observat…
View article: Assessment of the GCT Prototype’s Optical System Implementation and Other Key Performances for the Cherenkov Telescope Array
Assessment of the GCT Prototype’s Optical System Implementation and Other Key Performances for the Cherenkov Telescope Array Open
The Cherenkov Telescope Array (CTA) project, led by an international collaboration\nof institutes, aims to create the world's largest next generation observatory for Very High\nEnergy (VHE) gamma-ray astronomy. It will be devoted to observ…
View article: Intrinsic time lags in blazar flares and the search of Lorentz Invariance Violation signatures
Intrinsic time lags in blazar flares and the search of Lorentz Invariance Violation signatures Open
Some Quantum Gravity models predict a violation of Lorentz invariance. Namely, the velocity of photons in vacuum could depend on their energies. One possibility for Lorentz Invariance Violation (LIV) searches is to look for energy-dependen…
View article: Shocks in relativistic transverse stratified jets
Shocks in relativistic transverse stratified jets Open
The transverse stratification of active galactic nuclei (AGN) jets is\nsuggested by observations and theoretical arguments, as a consequence of\nintrinsic properties of the central engine (accretion disc + black hole) and\nexternal medium.…
View article: Shocks in relativistic transverse stratified jets, a new paradigm for radio-loud AGN
Shocks in relativistic transverse stratified jets, a new paradigm for radio-loud AGN Open
The transverse stratification of active galactic nuclei (AGN) jets is suggested by observations and theoretical arguments, as a consequence of intrinsic properties of the central engine (accretion disc + black hole) and external medium. On…
View article: The Cherenkov Telescope Array Observatory: top level use cases
The Cherenkov Telescope Array Observatory: top level use cases Open
Today the scientific community is facing an increasing complexity of the scientific projects, from both a technological and a management point of view. The reason for this is in the advance of science itself, where new experiments with unp…
View article: The GCT camera for the Cherenkov Telescope Array
The GCT camera for the Cherenkov Telescope Array Open
The Gamma-ray Cherenkov Telescope (GCT) is proposed for the Small-Sized Telescope component of the Cherenkov Telescope Array (CTA). GCT's dual-mirror Schwarzschild-Couder (SC) optical system allows the use of a compact camera with small fo…
View article: The Ultrasonic Polar Scan for Composite Characterization and Damage Assessment: Past, Present and Future
The Ultrasonic Polar Scan for Composite Characterization and Damage Assessment: Past, Present and Future Open
In the early 1980’s, the ultrasonic polar scan (UPS) technique was developed to assess the fiber direction of composites in a nondestructive way. In spite of the recognition by several researchers as being a sophisticated and promising met…