A. Silvestri
A5101571590- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Radio Astronomy Observations and Technology
- Quantum Chromodynamics and Particle Interactions
- Optimal Power Flow Distribution
- High-Energy Particle Collisions Research
- Power System Optimization and Stability
- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Microgrid Control and Optimization
- Smart Grid Energy Management
- Power Systems Fault Detection
- Islanding Detection in Power Systems
- Scientific Research and Discoveries
- Nuclear physics research studies
- Building Energy and Comfort Optimization
- Solar and Space Plasma Dynamics
- Power Transformer Diagnostics and Insulation
- Particle accelerators and beam dynamics
- Cosmology and Gravitation Theories
- Thermal Analysis in Power Transmission
- Energy Efficiency and Management
- Smart Grid Security and Resilience
University of L'Aquila
2008-2024
Marconi University
2024
Centre de Recerca Matemàtica
2023
Leiden University
2023
University of Brescia
2022
University of California, Irvine
2005-2014
Information Technology University
2014
Clark Atlanta University
2006-2012
University of Alaska Anchorage
2006-2012
Providence College
2006-2012
We have remotely mapped optical scattering and absorption in glacial ice at the South Pole for wavelengths between 313 560 nm depths 1100 2350 m. used pulsed continuous light sources embedded with AMANDA neutrino telescope, an array of more than six hundred photomultiplier tubes buried deep ice. At greater 1300 m, both coefficient absorptivity follow vertical variations concentration dust impurities, which are seen cores from other Antarctic sites track climatological changes. The varies by...
We report new limits on cosmic neutrino fluxes from the test flight of Antarctic Impulsive Transient Antenna (ANITA) experiment, which completed an 18.4 day a prototype long-duration balloon payload, called ANITA-lite, in early 2004. search for impulsive events that could be associated with ultrahigh energy interactions ice and derive constrain several models rule out long-standing -burst model.
In this paper, a new technique, based on genetic algorithms, for the optimal sizing and siting of distributed generation resources in MV distribution networks is presented. Tests two 43 93 buses are also provided to show efficiency proposed technique.
A gradient projection algorithm is presented for the dynamic dispatch of thermal generations, based upon an active set strategy and exploiting second order information in determining descent directions. The adapted to model problem which consists minimisation a nonlinear objective function subject quadratic equality constraints linear inequality constraints. envisaged can be applied dispatching units during steep load pick-up drop-down periods over short time intervals, also used day-before...
The Antarctic muon and neutrino detector array (AMANDA) began collecting data with ten strings in 1997. Results from the first year of operation are presented. Neutrinos coming through Earth Northern Hemisphere identified by secondary muons moving upward array. Cosmic rays atmosphere generate a background downward muons, which about ${10}^{6}$ times more abundant than muons. Over 130 days exposure, we observed total 300 events. In same period, $1.05\ifmmode\times\else\texttimes\fi{}{10}^{9}$...
The features of the new electricity market with presence many different operators lead to a interest in congestion management. changes market-clearing point schedules required by bottlenecks electric grid can be strongly reduced if flexible ac transmission system (FACTS) devices are suitably installed aim redistributing real and reactive power flows. Their optimal setting operation mode determined use customized security-constrained flow (SCOPF) programs. This paper deals FACTS as control...
We present the results of a search for point sources high-energy neutrinos in northern hemisphere using AMANDA-II data collected year 2000. Included are flux limits on several active-galactic-nuclei blazars, microquasars, magnetars, and other candidate neutrino sources. A excesses above random background cosmic-ray-induced atmospheric misreconstructed downgoing cosmic-ray muons reveals no statistically significant show that has achieved sensitivity required to probe known TeV gamma-ray such...
Data from the AMANDA-B10 detector taken during austral winter of 1997 have been searched for a diffuse flux high energy extraterrestrial muon neutrinos. This search yielded no excess events above those expected background atmospheric neutrinos, leading to upper limits on neutrino measured at earth. For an assumed E-2 spectrum, 90% classical confidence level limit has placed E2Phi(E)=8.4 x 10(-7) cm(-2) s(-1) sr(-1) GeV (for predominant range 6-1000 TeV), which is most restrictive bound by...
The aim of the paper is to describe methods contained in International Electrotechnical Commission (IEC) draft standard "Calculation short-circuit currents DC auxiliary installations power plants and substations", test them using dynamic computer simulation. network a 220-V system station fed by static converter. limits application proposed are also discussed with particular reference traction systems.
Asynchronous motors represent a large percentage of used in the electrical industry. Suitable predictive maintenance techniques are strongly required when these critical their operations. Continuous non-invasive monitoring can be investigated to avoid disconnection under test and service interruption. This paper proposes an innovative system based on online sweep frequency response analysis (SFRA) technique. The testing applies variable sinusoidal signals then acquires processes applied...
A search for nearly vertical up-going muon-neutrinos from neutralino annihilations in the center of Earth has been performed with AMANDA-B10 neutrino detector. The data collected 130.1 days live time 1997, ∼109 events, have analyzed this search. No excess over expected atmospheric background observed. An upper limit at 90% confidence level obtained on annihilation rate neutralinos Earth, as well corresponding muon flux limit, both a function mass range 100 GeV–5000 GeV.Received 8 February...
We report on a search for electromagnetic and/or hadronic showers (cascades) induced by diffuse flux of neutrinos with energies between 5 TeV and 300 from extraterrestrial sources. Cascades may be produced matter interactions all flavors neutrinos, contained cascades have better energy resolution afford background rejection than through-going \nu_\mu-induced muons. Data taken in 1997 the AMANDA detector were searched events high-energy cascade-like signature. The observed are consistent...
This paper describes the search for astronomical sources of high-energy neutrinos using AMANDA-B10 detector, an array 302 photomultiplier tubes used detection Cerenkov light from upward-traveling neutrino-induced muons, buried deep in ice at South Pole. The absolute pointing accuracy and angular resolution were studied by coincident events between AMANDA detector two independent telescopes on surface, GASP air telescope SPASE extensive shower array. Using data collected 1997 April to October...
We constrain the maximum flux from extragalactic neutrino point sources by using diffuse limits. show that is ${E}^{2}(d{N}_{\ensuremath{\nu}}/dE)\ensuremath{\le}1.4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}9}({L}_{\ensuremath{\nu}}/2\ifmmode\times\else\texttimes\fi{}{10}^{43}\text{ }\text{ }\mathrm{erg}/\mathrm{s}{)}^{1/3}\text{ }\mathrm{GeV}\text{ }{\mathrm{cm}}^{\ensuremath{-}2}\text{ }{\mathrm{s}}^{\ensuremath{-}1}$ individual with average luminosity per decade,...
$\textit{Euclid}$ will provide a powerful compilation of data including spectroscopic redshifts, the angular clustering galaxies, weak lensing cosmic shear, and cross-correlation these last two photometric observables. In this study we extend recently presented forecasts into Hu-Sawicki $f(R)$ cosmological model, popular extension Hilbert-Einstein action that introduces an universal modified gravity force in scale-dependent way. Our aim is to estimate how well future be able constrain extra...
This paper describes the possible evolution of Italian distribution system in facing growing penetration Dispersed Generation (DG), perspective smart grids. As for system, after discussing Hosting Capacity MV networks, it is recognized that some challenges are to be faced due increasing amount DG. Even though current technology provides satisfactory solutions manage this new situation, loss-of-mains protection (LOM) one most critical issues faced, at least system. Only an intelligent use...
An essential issue concerning short-circuit studies is about how precise calculations should be. Simplified procedures have been proposed for many years by International Committees to provide reference methods manual computation and the use of rated, rather than operating, equipment data. Recently, dynamic programs used accurately simulate currents. Two widely adopted international standards (ANSI/IEEE C37.010.1979 IEC 909 Standards) are investigated in this paper comparing pointing out most...