Abstract: A clock signal extractor (11) is connected to an interface of an information equipment (2) for processing an information signal, to extract a clock signal component from the information signal. A clock signal generator (12) generates a pseudo clock signal having an optional phase difference relative to the clock signal component extracted by the clock signal extractor (11). A prevention signal generator (13) generates, based on the pseudo clock signal generated by the clock signal generator (12), a leakage prevention signal having an electromagnetic wave strength stronger than electromagnetic waves leaking from the information signal. A prevention signal output unit (14) outputs the leakage prevention signal generated by the prevention signal generator (13).

Abstract: Speech dereverberation is achieved by accepting an observed signal for initialization (1000) and performing likelihood maximization (2000) which includes Fourier Transforms (4000).

Abstract: In a transceiver for inducing electric fields based on data to be transmitted in an electric field propagating medium and carrying out transmission and reception of data by using induced electric fields, having a transmission electrode and a transmission circuit, a transmission side switch is provided to disconnect the transmission circuit from the transmission electrode, when the transceiver is not in a transmission state in which the transmission circuit is supplying the transmission data to the transmission electrode.

Abstract: In the disclosed speech recognition based interactive information retrieval scheme, the recognition target words in the speech recognition database are divided into prioritized recognition target words that constitute a number of data that can be processed by the speech recognition processing in the prescribed processing time and that have relatively higher importance levels based on statistical information, and the other non-prioritized recognition target words. Then, the speech recognition processing for the speech input with respect to the prioritized recognition target words is carried out at higher priority, and a confirmation process is carried out when the recognition result satisfies a prescribed condition for judging that the retrieval key can be determined only by a confirmation process with the user.

Abstract: In the disclosed speech recognition based interactive information retrieval scheme, the recognition target words in the speech recognition database are divided into prioritized recognition target words that constitute a number of data that can be processed by the speech recognition processing in the prescribed processing time and that have relatively higher importance levels based on statistical information, and the other non-prioritized recognition target words. Then, the speech recognition processing for the speech input with respect to the prioritized recognition target words is carried out at higher priority, and a confirmation process is carried out when the recognition result satisfies a prescribed condition for judging that the retrieval key can be determined only by a confirmation process with the user.

Abstract: An information retrieval scheme using classification trees with respect to a plurality of information sources connected to a network is disclosed, where each classification tree having a hierarchical structure defined in terms of entries. In the information retrieval apparatus, classification tree class information for each classification tree class defined among entries constituting each classification tree is managed, where each classification tree class information indicating retrieval condition parameters for each classification tree class.

Abstract: The invention is directed to an optical connector in which a length of an optical fiber 5 projects from a connection end surface (16) of a ferrule (1) is accurately set, a method of and a fixture for setting the projection length of the optical fiber. A recess surface (33) is formed in a ferrule receiving surface (32). A depth of the recess surface (33) is equal to a length an optical fiber (5) projects from the connection end surface (16) of the ferrule (1). The ferrule (1) is held by ferrule holding members (35a) and (35b), so that the ferrule (1) is abutted against the ferrule receiving surface (32) by the urging force of compression springs (36). Through the ferrule (1), an optical fiber cored line (3) is projected from the connection end surface (16) of the ferrule (1) and abutted against the recess surface (33).

Abstract: A positive resist composition based on a silicone polymer contains a photo acid generator which will decompose to generate an acid upon exposure to radiation. The silicone polymer includes hydroxybenzyl units wherein some OH groups are replaced by t-butoxycarbonyl, t-butoxycarbonylmethyl, trimethylsilyl or tetrahydropyranyl groups. In a first form, the photo acid generator is a specific onium salt having at least one phenyl group with a t-alkoxy, t-butoxycarbonyloxy or t-butoxycarbonylmethoxy substituent. In a second form, the composition further contains a nitrogenous compound. In a third form, the composition further contains a dissolution inhibitor in the form of a specific silicone compound. The composition is sensitive to high energy radiation and has high sensitivity and resolution.

Abstract: This invention enables one, or both, or none of position servo control and position lock control of a galvanomirror, to control a read beam to an optimum position under any of on-track state, seek state, position setting state after the completion of a seek operation, and positional deviation existing state between a write beam and the read beam. The invention locks the position of the galvanomirror when a unit is energized or retried, reads a galvanomirror position signal provided at this moment, finds an offset signal for zeroing the galvanomirror position signal, and adds the offset to the position locked galvanomirror during a seek operation with the write beam, thereby removing an offset of the galvanomirror position signal.

Abstract: A frequency division scheme which offsets for a phase lag produced on initial power-on is described. A division ratio of a programmable counter is initially set at a first division ratio at the time of releasing the programmable counter from its reset state. When the first division cycle is complete, the division ratio is reset to its steady state value. Thus, a delay equivalent to the phase lag is produced. A frequency synthesizer is also proposed where the division ratio is set, and a phase difference is detected. Reset signals are continually set while the phase difference is changed. This cycle is continued until the phase difference is reduced to one cycle of the input signals or less.

Abstract: An impedance matched class-F high frequency amplifier includes an input matching circuit receiving high frequency signals connected to the gate of the FET. The drain of the FET is connected to an output matching circuit which matches the fundamental frequency and the second harmonic frequency, and the output of the output matching circuit is connected to an even harmonic terminating circuit. The stray reactance componance at the output impedance of the FET is offset by the output matching circuit, and therefore the even harmonics terminating circuit can more accurately terminate the second harmonic frequencies.

Abstract: An electrically controlled optical device includes a traveling wave electrode structure, a shield conductor and a thick buffer layer having a low dielectric constant. The thickness of an overlaid layer disposed between the traveling wave electrode structure and the shield conductor, as well as the thickness of the buffer layer, is determined so that the effective index of a microwave transmitted through the traveling wave electrode structure approaches the effective index of light transmitted through an optical waveguide, so that the microwave conductor loss is reduced, and so that the characteristic impedance of the traveling wave electrode structure approaches the characteristic impedance of an associated external microwave circuit.