Pulse wave velocity (PWV) is a measure of arterial stiffness.he study of the basic scientific principles of the velocity of the pulse wave through the arterial tree dates back to 1808 with the work of Thomas Young.
Put simply, chain migration is a derogatory term used to describe the ability of U.S. citizens and green card holders to bring their extended family into the country. A majority of the roughly one million foreigners who are allowed to enter the U.S. to become permanent residents each year are approved because they're related to Americans.
By: System Administrator On: 2016-01-09 20:45 (275664 Reads) Migration Push and Pull Factors/ Global Migration Patterns. Migration can be defined as a form of relocation diffusion (the spread of ideas, innovations, behaviors, from one place to another) involving permanent move to a new location. The reasons that people migrate would be due to push and pull factors. Push and Pull factors are forces that can either induce people to move to a new location or oblige them to leave old residences; they can be economic, political, cultural, and environmentally based.