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...system, the requirements are framed differently. They stipulate that the chances of inadvertent contamination of its internal ocean must be less than one in 10,000 per mission. Unrealistic standards? None of these rules have any force in law, and there are fears that they are liable to be be bent or broken on cost-saving grounds. Rather than leave them in place to be...

...system can be directed to several workstations. Ideal for automation as no mechanical or electrical contact is needed between workpiece and laser beam. Five-axis, fully automated and programmable machines are available, enabling complex weldments. No vacuum required, so no vacuum interlocks. Sections to be joined must be closely and accurately positioned due to small spot...

...systems rather than targeting one type of molecule. The effects of polonium poisoning are effectively those of acute radiation poisoning. These occur within one day of exposure to a large dose of ionising radiation. The effects are all based on damage occurring to the body’s fast-growing cells: bone marrow – a drop in number of blood cells causing tiredness...