In general, the discriminant is an algebraic expression that gives. information about the roots of a polynomial. In the case of a quadratic equation the discriminant is the part of. the quadratic equation that is under the radical sign.
How to Select Dampers and Louvers. Dampers and louvers are used to control the flow of air in a process system or enclosed area. Dampers are usually motorized or manually-adjustable for flow control. Louvers are often fixed for a constant flow rate.
Calipers vs. Cantilevers. Bicycle rim brakes divide into two basic types: cantilever and caliper. Caliper brakes are self-contained mechanisms, attached to the bicycle's frame by a single bolt for each brake, front or rear. The arms reach downward from above the tire, and need to be long enough to get around the tire. Cantilever brakes attach to the sides of a bicycle's frame/fork, separately on each side.