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...systems will make process economical for a wider range of components. Pressures vary from 50 to 200 MPa, and temperatures up to 2000˚C with control to ±15˚C possible. Temperature depends on material, but should be high enough to cause diffusion-bonding and low enough to avoid any undesirable structural changes. Typical examples are Ti-6Al-4V, 900˚C; Al-7.5Si-0.5Mg,...

...system. Pioneers: Donald Davies Donald Davies, a British pioneer of the early internet, explain his key contribution to internet technology - chopping data into small packets that could be transmitted across the netwrok and recombined at the other end. Pioneers: Tim Berners-Lee Tim Berners-Lee, the inventor of the world wide web, talks about where the idea came from and...

...system. Fortunately, the sarin used was impure, otherwise the casualty list would have been much longer. As it was, 13 people died and several thousands got sick. Although there were claims that VX was used during the Iran-Iraq war, until recently, the only known human fatality caused by VX occurred when two members of the Aum Shinrikyo cult used VX to assassinate a...