Abstract: Shape-memory polymer is a new kind of material utilizing shape memorizing mechanism of elastomer of polyurethane family. These materials exhibit novel properties such as sensing (thermal), actuaton, high damping, adaptive responses, super-elasticity capability and air permeability. Recently, they are used and applied to finish textiles and garments. Although there are some characterization methods for shape memory polymers, there is currently no characterization method to evaluate the effects of shape memory fabrics. This invention provides a method to determine the shape memory coefficient of fabrics. The fabric is first deformed from the original state to a deformed state and then subjected to a switch temperature. Different parameters are measured at the original state before and after the fabric is subjected to the switch temperature to determine the shape memory coefficient.

Abstract: A method for improving sensitivity of a RF receiver and a RF receiver designed by the same are provided. The RF receiver, which receives a RF signal, comprises a sampling converting circuit, a decoding circuit, a frequency-hopping circuit, a constant current source and a ring oscillating circuit. The RF receiver outputs a frequency-hopping signal to the frequency-hopping circuit when the decoding circuit determines that the digital data converted from the RF signal is not equivalent to each of the internal preset data. The frequency-hopping circuit outputs a frequency-hopping current to the ring oscillating circuit to change a sampling clock of the RF receiver.

Abstract: A method for improving sensitivity of a RF receiver and a RF receiver designed by the same are provided. The RF receiver, which receives a RF signal, comprises a sampling converting circuit, a decoding circuit, a frequency-hopping circuit, a constant current source and a ring oscillating circuit. The RF receiver outputs a frequency-hopping signal to the frequency-hopping circuit when the decoding circuit determines that the digital data converted from the RF signal is not equivalent to each of the internal preset data. The frequency-hopping circuit outputs a frequency-hopping current to the ring oscillating circuit to change a sampling clock of the RF receiver.

Abstract: An improved method for achieving a defect-free and uniform liquid crystal alignment in a process for the production of a ferroelectric liquid crystal display device. A process for producing a ferroelectric liquid crystal display device containing a ferroelectric liquid crystal showing at least an N* phase and an SmC* phase and an organic polymer film or an oblique vapor-deposition film of an inorganic substance serving as an alignment layer is provided by aligning the liquid crystal by cooling the liquid crystal once to a temperature region of a phase which resides in the lower temperature region than the N* phase, and then heating it to a temperature region of an N* phase, or by aligning the liquid crystal by applying an electric field in the N* phase.