The catchment population is, at any given time, the totality of those in the âwere -wouldâ state of: were the. illness now to occur, it would be âcaughtâ by that case identification scheme [Source: Miettinen OS, 2007] Study base , a. series of person-.
A tier 1 network is an Internet Protocol (IP) network that participates in the Internet solely via settlement-free interconnection, also known as settlement-free peering.y the strict definition of peering and the strict definition of a tier 1 network, a tier 1 network only peers with other tier 1 networks and has no transit routes going anywhere.
Difference between 1-tier/2-tier & 3-tier architecture are as follows: Tier can be defined as one of two or more rows, levels, or ranks arranged one above another. 1-Tier Architecture is the simplest, single tier on single user, and is the equivalent of running an application on a personal computer.All the required component to run the application are located within it.ier can be defined as one of two or more rows, levels, or ranks arranged one above another. 1-Tier Architecture is the simplest, single tier on single user, and is the equivalent of running an application on a personal computer. All the required component to run the application are located within it.