A multi-well plate such as a microtiter plate is secured from its well side in a manner that corrects or compensates for any deviations of the plate base from a planar configuration. The flexible pipe is formed by winding a metallic tubular member in a spiral shape in an overlapped manner, and a plurality of wavy corrugations are formed on the peripheral wall surface of the flexible pipe continuously in the axial direction. Based on the hints, forecasts relating to potential elevator passengers are prepared, on the basis of which forecasts one or more anticipatory control actions are executed. Straps secure the pad to a bed frame beneath the mattress to maintain compression and a V-shaped section with no material or a soft material maintains the zero gap when the mattress is in an articulate position.