This invention is about three new measuring methods to determine the twist angle and retardation value of any twisted nematic liquid crystal cell. Twist angle of the liquid crystal alignment and the retardation value are important design parameters in determining the optical performance of liquid c.....
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This invention is about three new measuring methods to determine the twist angle and retardation value of any twisted nematic liquid crystal cell. Twist angle of the liquid crystal alignment and the retardation value are important design parameters in determining the optical performance of liquid c.....
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The Internet has been a widely-adopted means of media distribution in these days especially after the introduction of MPEG file format. To gain control over listeners', on-line suppliers of music files use authentication schemes to control listeners' access and access mode. Such arrangements requir.....
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Zeolites are microporous crystalline aluminosilicate molecular sieve that have pore sizes ranging from about 0.3 to 1 mm. Due to their uniform, molecular-sized pores, they can separate molecules based on their size, shape and polarity. They can therefore act as ''molecular sieves''. Membranes made o.....
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Portable electronic devices such as laptop computers, personal digital assistants, and portable DVD players and the like have become increasingly common and popular. One reason for the success of such devices is the advance in the technology of low power, lightweight and inexpensive flat-panel displ.....
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