A5073402936- Quantum chaos and dynamical systems
- Superconducting and THz Device Technology
- Radio Astronomy Observations and Technology
- Scientific Research and Discoveries
- Astro and Planetary Science
- Cosmology and Gravitation Theories
- Radio Frequency Integrated Circuit Design
- Stellar, planetary, and galactic studies
- Nonlinear Dynamics and Pattern Formation
- Chaos control and synchronization
- Physics of Superconductivity and Magnetism
- Dark Matter and Cosmic Phenomena
- Spacecraft Dynamics and Control
- Microwave Engineering and Waveguides
- Geophysics and Gravity Measurements
- Statistical Mechanics and Entropy
- Gyrotron and Vacuum Electronics Research
- Numerical methods for differential equations
- High-pressure geophysics and materials
- Astrophysics and Star Formation Studies
- Galaxies: Formation, Evolution, Phenomena
- Neutrino Physics Research
- Astronomy and Astrophysical Research
- Lymphoma Diagnosis and Treatment
- Mathematical Dynamics and Fractals
Universidad Nacional de La Plata
2012-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2012-2024
Federico II University Hospital
2023-2024
Sapienza University of Rome
2005-2023
Instituto de Astrofísica de La Plata
2010-2022
Fondazione Bruno Kessler
2010-2016
University of Milano-Bicocca
2015-2016
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2009-2012
National University of Ireland, Maynooth
2011
Istituto Nazionale di Fisica Nucleare
2010
Context. The Neel IRAM KIDs Array (NIKA) is a fully-integrated measurement system based on kinetic inductance detectors (KIDs) currently being developed for millimeter wave astronomy. In first technical run, NIKA was successfully tested in 2009 at the Institute Millimetric Radio Astronomy (IRAM) 30-meter telescope Pico Veleta, Spain. This prototype consisted of 27-42 pixel camera imaging 150 GHz. Subsequently, an improved has been and October 2010 Veleta telescope. instrument upgrades...
<i>Context. <i/>Current generation millimeter wavelength detectors suffer from scaling limits imposed by complex cryogenic readout electronics. These instruments typically employ multiplexing ratios well below a hundred. To achieve greater than thousand, it is imperative to investigate technologies that intrinsically incorporate strong multiplexing. One possible solution the kinetic inductance detector (KID). assess potential of this nascent technology, prototype instrument optimized for 2...
Istat is one of the few public institutions that have initiated implementation Occupational Health and Safety Management System (OHSMS) since 2018 in order to ensure Prevention Protection Measures application. In 2018, achieved British Standard OHSAS 18001 certification later, 2021, UNI ISO 45001:2018 was confirmed updated. Organisational management measures are basis for defining prevention protection system. The evolution health safety organisation required designated figures specific...
We report an intrinsic relation between the mean exponential growth factor of nearby orbits (MEGNO) and fast Lyapunov indicator (FLI), two variational methods that have been widely applied to stability issues in astronomy. For both continuous-time discrete-time systems, we arrive at analytic formula expresses MEGNO terms FLI its time-average. This connection, unknown for more than 10 years, allows us understand differences similarities performance indicators.
The reader can find in the literature a lot of different techniques to study dynamics given system and also, many suitable numerical integrators compute them. Notwithstanding recent work Maffione et al. (2011a) for mappings, detailed comparison among widespread indicators chaos general is still lacking. Such could lead select most efficient algorithms certain dynamical problem. Furthermore, order choose appropriate them, more comparative studies are also needed. This deals with both...
The present work revisits and improves the Shannon entropy approach when applied to estimation of an instability timescale for chaotic diffusion in multidimensional Hamiltonian systems. This formulation has already been proved efficient deriving 4D symplectic maps planetary systems, proceeds along layers resonance's web. Herein technique is used estimate rate Arnold model, i.e., motion homoclinic tangle so-called guiding resonance several values perturbation parameter such that overlap...
In this paper we discuss the relevance of diffusive processes in multidimensional Hamiltonian systems. By means a rather simple model, present evidence that for moderate-to-strong chaotic systems stochastic motion remains confined to disjoint domains on energy surface, at least mild times. We show only extremely large timescales and perturbations, does component appear almost fully connected through relics resonance structure. The discussion whether diffusion over surface could actually...
Next generation calorimetric experiments for the search of rare events rely on detection tiny amounts light (of order 20 optical photons) to discriminate and reduce background sources improve sensitivity. Calorimetric detectors are simplest solution photon at cryogenic (mK) temperatures. The development silicon based with enhanced performance thanks use Neganov–Luke effect is described. aim this research line production high industrial-grade reproducibility reliability.
A new generation of cryogenic light detectors exploiting the Neganov-Luke effect to enhance thermal signal has been used detect Cherenkov emitted by electrons interacting in ${\mathrm{TeO}}_{2}$ crystals. With this mechanism a high significance event-by-event discrimination between $\ensuremath{\alpha}$ and $\ensuremath{\beta}/\ensuremath{\gamma}$ interactions at $^{130}\mathrm{Te}$ neutrino-less double-$\ensuremath{\beta}$ decay $Q$ value $2527.515\ifmmode\pm\else\textpm\fi{}0.013$ keV...
Atmospheric emission is a dominant source of disturbance in ground-based astronomy at millimetric wavelengths. The Antarctic plateau recognized as an ideal site for and submillimetric observations, the French/Italian base Dome Concordia (Dome C) among best sites on Earth these observations. In this paper, we present measurements C atmospheric intensity polarization 2-mm wavelength. This one observational frequencies cosmic microwave background (CMB) observations when considering signal...
In a previous paper based on dark matter only simulations we show that, in the approximation of an analytic and static potential describing strongly triaxial cuspy shape Milky Way-sized haloes, diffusion due to chaotic mixing neighbourhood Sun does not efficiently erase phase space signatures past accretion events. this second further explore effect using multicomponent Galactic models solar neighbourhood-like volumes extracted from fully cosmological hydrodynamic simulations, thus naturally...
The present work consists of a study the dynamical stability three-body system that takes advantage Shannon entropy approach to estimate diffusivity ( D S ) in Delaunay’s action-like phase space. We outline main features numerical computation from solutions equations motion and, thereupon, we consider how macroscopic instability timescale, τ inst , (roughly speaking, lifetime system) associated with given set initial conditions. Through such estimates, are able characterize system’s space...