Display board is a generic term for a board-shaped material that is rigid and strong enough to stand on its own, and generally used paper or other materials affixed to it.
The new technology TensioClinic Arteriograph is the first evidence based medicine diagnostic device, which reportedly measures internationally accepted arterial stiffness parameters (Pulse Wave Velocity and Augmentation Index) together with central and peripheral blood pressure in a 3-minute session.
When the vibrator tunes to the resonant frequency of the system, the reactive load impedance cancels out to zero by virtue of the inductance reactance (mass of the system) equalling the compliance or stiffness reactance (elasticity of the tubular).
A particular innovation was his Gaussian vault, a thin-shell structure for roofs in single-thickness brick, that derives its stiffness and strength from a double curvature catenary arch form that resists buckling failure.
The study, reported in a paper to the Institution of Mechanical Engineers in 1996, showed that the diagonal pillar concept allowed mass reduction, improved passenger views and flexibility of seating layout, whilst maintaining adequate body strength and stiffness.
Such "superlubric" threshold depends on the tip-surface interaction and the stiffness of the materials in contact, as described by the Tomlinson model.