A fuel cell stack made of a plurality of cell units stacked and operatively connected at one end thereof. Each of the units includes a holder (20) having at least one cell, typically provided as an SOFC membrane, to produce an electric current when fuel an...

A four-degrees-of-freedom (DOF) nonresonant micromachined gyroscope utilizes a dynamical amplification both in the 2-DOF drive-direction oscillator and the 2-DOF sense-direction oscillator, which are structurally decoupled, to achieve large oscillation amp...