Abstract: A system and method for unique authentication of each replication of a plurality of soft-copy documents, forming a group. One soft-copy document, out of the group, becomes a carrier for an authentication code aimed at protecting the group. The authentication code is computed from the concatenation of the plurality of soft-copy documents and a key. A random number is also generated for each replication of the group of files. The random number is combined with the authentication code to mark the soft-copy document which has been selected to become the carrier. Thus, the invention introduces randomization in the insertion of the authentication code so that for each replication of an identical group of data files, unique authentication data can be associated, merged and hidden in the transmitted information.

Abstract: In a method for adjusting the phase of a sound signal from multiple speaker units connected to a computer (e.g. a PC), a microphone is installed at a user's listening position, a reference sound is generated from a single particular speaker unit based on a reference sound data having a certain waveform, a phase difference between the reference sound data and a sound detected by the microphone is calculated for each of the speakers, an average value qF of the phase differences for front speakers and an average value qR of the phase differences for rear speakers are respectively calculated, and if |qF−qR|≧90°, phases of the sound data output to the rear speakers are inverted.

Abstract: To provide a liquid crystal device having a uniform vertical alignment, a method for fabricating it easily, and its fabricating apparatus in fabricating an ECB-type vertically aligned liquid crystal device, a liquid crystal device includes liquid crystal molecules 12 each having a negative dielectric anisotropy and polyimide films for homogeneous alignment, wherein a method for fabricating a liquid crystal device including a process of vertically orienting liquid crystal molecules is constructed by exposing the liquid crystal molecules to light from either or both sides of substrates 14 of the liquid crystal device whose liquid crystal molecules each having a negative dielectric anisotropy are homogeneously oriented using polyimide films for homogeneous alignment. In addition, an aligner used for exposure is equipped with a filer so as to cut light having wavelengths of 400 nm or less and 600 nm or more, so that light having a wavelength of 400 to 600 nm can be utilized.