1,721,496 research outputs found
Performance of the two aerogel Cherenkov detectors of the JLab Hall A hadron spectrometer Author(s): Marrone S
No full textMeasurement of the 151-Sm(n,gammo)152-Sm Cross section at n_TOF
No full textThe 151-Sm(n,gamma)152-Sm cross section, which is important for the interpretation of the 151-Sm branching as an s-process thermometer, was measured from 1 eV Up to 1 MeV at the innovative n_TOF facility at CERN
On the transferability of adversarial perturbation attacks against fingerprint based authentication systems
No full textThe growing availability of cheap and reliable fingerprint acquisition scanners is resulting in an increasing spread of Fingerprint-based Authentication Systems (FAS) in consumer electronics. This has giving rise to a new wave in research on both smarter spoofing attacks, aimed to bypass a FAS by using a counterfeit fingerprint, and on more effective Liveness Detectors (LD), aimed to discern authentic (live) fingerprints from fake ones. As in many other computer vision tasks, deep Convolutional Neural Networks (CNN) demonstrated to be very effective also for fingerprint liveness detection. However, we showed that it is possible to adapt adversarial perturbation approaches to mislead CNN-based LD. In this paper, we want to make a step further toward the design of a black-box attack by investigating whether it is possible to transfer a perturbation across different CNN liveness detectors in the case of a target LD very different from the one used to compute the perturbations. To this aim, we designed an attack scenario where a shadow LD (i.e. an adaptation of the substitute technique for the liveness detection application) is used to generate an adversarial fingerprint in a white-box setting before submitting it to the real target LD, invoked in a total back-box manner. Finally, we analysed the impact that such attack has on the authentication system, also analysing if and to what extent the scanner and the spoofing material combinations affect the success of the attack
What Would Happen if Hackers Attacked the Railways? Consideration of the Need for Ethical Codes in the Railway Transport Systems
No full textOn Performance Evaluation of Security Monitoring in Multitenant Cloud Applications
Full text linkIn this paper we present a modeling approach suitable for practical evaluation of the delays that may affect security monitoring systems in (multitenant) cloud based architecture, and in general to support professionals in planning and evaluating relevant parameters in dealing with new designs or migration projects. The approach is based on modularity and multiformalism techniques to manage complexity and guide designers in an incremental process, to help transferring technical knowledge into modeling practice and to help easing the use of simulation. We present a case study based on a real experience, triggered by a new legal requirement that Italian Public Administration should comply about their datacenters
Combining Genetic Algorithms and Fault Tree Analysis in reliability/cost optimization for critical complex systems
No full textResidual stress measurements on a cut-welded Al-Ti plate using neutron diffraction techniques
Full text linkThe nature and effect of residual stress on cut-weld Al-Ti plane disc was studied by means of neutron diffraction techniques. The study was extended from the parent aluminium-manganese-magnesium AA3003 alloy to the weld Al-Ti interface and then to the parent commercially pure titanium alloy. For this study, pulse neutron diffraction technique was applied. The residual stress level resulted practically weak within the two parent materials. Yet, it was found that the mean strain level suddenly increased in correspondence to the diffusion affected zone due to the cut-welding process. Microstructure diffusion processes within a narrow weld interface zone were investigated by scanning electron microscopy and energy dispersive spectrum techniques
Implications of 151-Sm (n,gamma) Cross Section at n_TOF
No full textThe accurate knowledge of the 15ISm(n,gamma) cross section has important implications for the nuclear technologies as well as far fundamental studies. Due to its radioactivity, the only experimental data available on 151Sm were derived from a transmission measurement. Nowadays thanks to the innovative features of neutron time-of-flight facility (n_TOF), it was possible to measure 151Sm(n,gamma) cross section in a wide energy range and with good accuracy. We present, here, the main experimental results together with the implications concerning the nuclear astrophysical part
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