Agate is good protective energy stone, especially for children, and is very calming and soothing. It also can help strengthen the body's connection to the earth.
The friction factor, f, is a dimensionless factor that depends primarily on the velocity u, diameter D, density Ï, and viscosity Î·. It is also a function of wall roughness which depends on the size Îµ, spacing Îµ' and shape of the roughness elements characterized by Îµ''.
The Impact Factor (IF) is a measure of the frequency with which the average article in a journal has been cited in a specific year. It is used to measure the importance or rank of a journal by calculating the times its articles are cited. The Impact Factor is considered the number one ranking value for scientific journals.