Francesco di Pierro

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Following the events of September 11, 2001, in the United States, world public awareness for possible terrorist attacks on water supply systems has increased dramatically. Among the different threats for a water distribution system, the most difficult to address is a deliberate chemical or biological contaminant injection, due to both the uncertainty of the(More)
The design of water distribution networks is a large-scale combinatorial, non linear optimisation problem, involving many complex implicit constraint sets, such as nodal mass balance and energy conservation, which are commonly satisfied through the use of hydraulic network solvers. These problem properties have motivated several prior studies to use(More)
The flat-spectrum radio quasar PKS1441+25 at a redshift of z = 0.940 is detected between 40 and 250 GeV with a significance of 25.5σ using the MAGIC telescopes. Together with the gravitationally lensed blazar QSOB0218 +357 (z = 0.944), PKS1441+25 is the most distant very high energy (VHE) blazar detected to date. The observations were triggered by an(More)
A. Haungsa∗, W.D. Apel, J.C. Arteagaa†, A.F. Badeaa‡, K. Bekk, A. Bercuci, M. Bertaina, J. Blümer, H. Bozdog, I.M. Brancus, M. Brüggemann, P. Buchholz, A. Chiavassa, F. Cossavella, K. Daumiller, F. Di Pierro, P. Doll, R. Engel, J. Engler, P.L. Ghia , H.J. Gils, R. Glasstetter, C. Grupen, D. Heck, J.R. Hörandel, T. Huege, P.G. Isara§, K.-H. Kampert, H.O.(More)
Using data measured by the KASCADE-Grande air shower array, an upper limit to the flux of ultra-high energy gamma-rays in the primary cosmic-ray flux is determined. KASCADE-Grande measures the electromagnetic and muonic components for individual air showers in the energy range from 10 PeV up to 1 EeV. The analysis is performed by selecting air showers with(More)
A.F. Badeaa∗†, T. Antoni, W.D. Apel, K. Bekk, A. Bercuci, M. Bertaina, H. Blümer, H. Bozdog, I.M. Brancus, M. Brüggemann, P. Bucholz, A. Chiavassa, K. Daumiller, F. di Pierro, P. Doll, R. Engel, J. Engler, H. Falcke, F. Feßler, P.L. Ghia, H.J. Gils, R. Glasstetter , A. Haungs, D. Heck, J.R. Hörandel, A. Horneffer, T. Huege, K.-H. Kampert , G.W. Kant, H.O.(More)
Recent results from the multi-detector set-up KASCADE on measurements of cosmic rays in the energy range of the so called ”first” knee (at ≈ 3PeV) indicate a distinct knee in the energy spectra of light primary cosmic rays and an increasing dominance of heavy ones towards higher energies. This leads to the expectation of knee-like features of the heavy(More)