Grid infrastructure
A grid infrastructure for one country, with one Tier 1 centre, and several Tier 2 regional centres. Tier 3 centres are at university level, Tier 4 centres are inside research departments.
International Journal of High-Energy Physics
A grid infrastructure for one country, with one Tier 1 centre, and several Tier 2 regional centres. Tier 3 centres are at university level, Tier 4 centres are inside research departments.