Luigi De Simone

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Network Function Virtualization (NFV) is an emerging solution that aims at improving the flexibility, the efficiency and the manageability of networks, by leveraging virtualization and cloud computing technologies to run network appliances in software. Nevertheless, the "notarization" of network functions imposes software reliability concerns on future(More)
Network Function Virtualization (NFV) is an emerging solution that aims at improving the flexibility, the efficiency and the manageability of networks, by leveraging virtualization and cloud computing technologies to run network appliances in software. However, the “softwarization” of network functions raises reliability concerns, as they will(More)
Nowadays, Cloud Computing is a fundamental paradigm that provides computational resources as a service, on which users heavily rely. Cloud computing infrastructures behave as an ecosystem, where several actors play a crucial role. Unfortunately Cloud Computing Ecosystems (CCEs) are often affected by outages, such as those experienced by Amazon Web Service(More)
Bugs affecting storage device drivers include the so-called protocol violation bugs, which silently corrupt data and commands exchanged with I/O devices. Protocol violations are very difficult to prevent, since testing device driver is notoriously difficult. To address them, we present a monitoring approach for device drivers (MoIO) to detect HO protocol(More)
Objective: Although many studies in medical literature are comparing percutaneous trans-septal mitral commissurotomy (PTMC) and open mitral commissurotomy (OMC), very few long-term comparative follow-ups are available. Methods: Between January 1991 and December 1997, 193 patients with isolated mitral stenosis were assigned either to PTMC (111 cases) or to(More)
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