A boat lift includes a base mounted on land adjacent to a body of water, a swinging frame mounted to the base by a first swinging coupling, a boat-supporting frame mounted to the swinging frame by a second swinging coupling, and an actuator for causing the swinging frame to swing relative to the base about the first swinging coupling. In particular, several embodiments are directed toward devices to expose cells to fluid shear forces in order to measure changes in internal cell forces. Consistency point entries are used to indicate a time of a known good, or recoverable, state of the application. The insulative housing includes a base and a pair of arms disposed therefrom. The testing apparatus has the ability to generate an electrical field intensity between the electrodes of about 140 to 170 kv per centimeter with an applied voltage in the range of 60 to 80 kv to the energized electrode.