The kinetic data are consistent with greater jump performance among terrestrial blennies, showing that these blennies generated greater fore-aft force impulses, facilitating increased jump distance.
The system's computer control unit uses a combination of sensors to measure the force exerted by each wheel, the side-to-side and fore-and-aft forces acting on the car and other factors.
The effect of the backrest on fore-and-aft forces on the seat depended on whether the feet were supported or not.
The fore-and-aft forces were measured at five vertical locations (using a flat vertical contact area 120 mm in height) and with a flat vertical backrest covering the entire back.
With vertical excitation, various models fit the measured vertical apparent mass of the human body, but experiments also show high fore-and-aft forces on the seat (the fore-and-aft cross-axis apparent mass) that have not influenced current models.
During vertical excitation of the seated human body there are vertical and fore-and-aft forces at the seat that are influenced by contact with a backrest, so it is desirable to take into account the effect of a backrest when developing models of the seated human body.
The model was then extended by the addition of vertical and fore-and-aft reaction forces to the upper lumbar spine to model the interaction between the human body and a backrest.
Until Ms. Weingarten and the national AFT recognize parent power, it's clear that parents will continue to face the same harassment and intimidation that parents organizing around Parent Trigger faced in Compton, where a Los Angeles Superior Court Judge was forced to slap an entire school district with a Preliminary Injunction for violating the Constitutional rights of its own parents.
When they are also pulling the car along, some of the available force is dedicated to fore and aft, and there's less available for side-to-side work.
The fore-and-aft, lateral and vertical forces on a seat and a backrest have been investigated with 12 male subjects exposed to random fore-and-aft whole-body vibration (0.25 10 Hz) at four vibration magnitudes (0.125, 0.25, 0.625, and 1.25 m s−2 rms).
Only longitudinal (fore-aft, Fy) and vertical forces (Fz) were used for analysis.
