Computer Scientist, Nanotechnologist
...as long as the structures that encode the memory and personality of a human being have not been irretrievably "erased" (to use computer jargon) then restoration to a fully functional state with memory and personality intact is in principle feasible. Any technology independent definition of "death" should conclude that such a person is not dead, for a sufficiently advanced technology could restore the person to a healthy state.
Artificial Intelligence Researcher
...I hope [from reading this you will] gain an entirely new perspective on where your "identity" is located... ...if your brain were non-destructively frozen (e.g. by vitrification in liquid nitrogen); and a computer model of the synapses, neural states, and other brain behaviors were constructed a hundred years later; then it would preserve exactly everything about you that was preserved by going to sleep one night and waking up the next morning.