Abstract: A base station transmits a first signal spread according to a direct spread scheme and having carrier frequencies hopped between two frequencies f1 and f2. In a mobile station, output signals of two carrier generators are changed over by a change-over switch. When the signal transmission frequency in the base station is f1, the mobile station receives the first signal having the frequency f1 and transmits a second signal having the frequency f2. When the signal transmission frequency in the base station is f2, the mobile station receives the first signal having the frequency f2 and transmits the second signal having the frequency f1.

Abstract: The present invention relates to a method of treatment of waste water which is characterized by removal of both organic substances and phosphorus from phosphorus-containing organic waste water by novel microorganisms that are fortified in phosphorus-incorporating and/or accumulating abilities.

Abstract: A heating roller device including a center shaft, a heat roller rotatably supported on the center shaft, and heating means provided inside the heat roller has the wear resistance of the outer surface of its heat roller outer surface increased and its availability factor enhanced by forming the outer surface of the heat roller with a hard carbon film of hydrogenated amorphous carbon. The hard carbon film is preferably formed on an intermediate layer formed on the outer surface of the heat roller beforehand so and to increase its adhesion to the outer surface. Wear resistance can be further enhanced by forming the outer surface of the heat roller with a hard layer, forming an intermediate layer on the hard layer and forming the hard carbon film on the intermediate layer.

Abstract: A dent (1A) for a reed for use on a high-speed weaving machine, comprises a thin flat strip (3) made of stainless steel, and a hard carbon film (2) formed on only the surface of a working ridge edge portion (3b) of the thin flat strip (3) to come into sliding contact with a yarn. The method of manufacture comprising steps of superposing a plurality of thin flat strips (3) made of a stainless steel in the same shape in a stack with the flat side surfaces (3a) of the adjacent thin flat strips (3) in close contact with each other, placing the stack of thin flat strips (3) in a film forming atmosphere with the ridge edge portions opposite the working edge portions (3b) to come in sliding contact with a yarn trued up by a dent aligning jig, and coating the working ridge edge portions (3b) of the thin flat strips (3) exposed to the film forming atmosphere with a hard carbon film (2).

Abstract: A synchronizing method and circuit accurately and stably operates a direct spread spectrum multiple access communication system. A signal transmitted by modulating the spreading code with data at the transmission side is sampled by a signal of n times (n: 1 or larger integer) the clock speed of the spread spectrum signal at the reception side, and the correlation is detected by a digital matched filter. Consequently, the detection output in every sample in the symbol period is compared with the envelope detection output determined in every sampling period, and the sample positions for a specific number of determined samples are stored in the descending order of the output. The number of times of storage of large sample positions in the stored detection output is counted in every symbol period, and the position of the largest number of storage times is detected as the peak position. From this peak position, capturing or holding the symbol period and setting of the reception window position results.

Abstract: A frequency converter has low noise figure and high conversion gain characteristics, and can drive directly a 50 Ohm load. In one embodiment, a dual-gate FET is employed that is composed of a first and second FET as the frequency mixing elements, and a third FET is connected in parallel to the first. The gate voltage of the first FET is set to be substantially equal to the pinch-off voltage in order to thereby ensure low noise figure. The second FET is set to a high g.sub.m, from which a frequency-converted signal is outputted. The gate bias of the third FET is set to provide a path for the current flowing through the second FET. As a result, the second FET can be set to a high g.sub.m regardless of the gate voltage of the first FET, in order to ensure high conversion gain.

Abstract: An easily regeneratable printed thermoplastic resin product is provided by printing it with a specific radiation-curable ink composition and curing the printed ink with radiation to form a cured ink film thereon.

Abstract: A 3-element series parallel resonator, which performs series resonance and parallel resonance at a predetermined frequency by a combination of three elements including an inductor and a capacitor of concentrated constants, is used as a filter. This design can reduce the circuit constant and permits a filter to be formed on a semiconductor substrate. Accordingly, various micro-wave devices, such as an amplifier which requires a filter, a frequency converter, a multiplier and signal switcher, can be designed into an MMIC on a single chip.

Abstract: There are provided a third-order nonlinear optical material comprising a film formed on the surface of a transparent substrate and consisting essentially of an oxide of a metal selected from the group consisting of V, Cr, Mn, Fe, Co, Ni and Cu; and a third-order nonlinear optical material of the type as described above wherein the film additionally contains a metal selected from the group consisting of Au, Ag and Cu in the form of particles dispersed therein and having a particle size of at most 500 nm.

Abstract: In a base station which has a plurality of antennas, each of a plurality of comparison circuits operates to compare correlation levels, which are obtained by despreading received signals for a plurality of channels, with each other with respect to the antennas. Each of a plurality of transmission antenna selecting circuits operates to determine from which antenna a transmission signal is to be transmitted for every channel. Each of a plurality of multiplexing circuits operates to multiplex the transmission signals of the individual channels, which are spread, for every antenna. As a result, on the basis of the result of the comparison of the correlation levels with respect to the antennas, a transmission antenna is selected for every channel, and the signals of the channels that are to be transmitted by a given antenna are multiplexed, whereby the base station achieves transmission diversity.

Abstract: A thermoplastic resin composition comprising:(a) about 20 to 80% by weight of polyphenylene ether resin comprising at least one structural unit in its backbone represented by the formula: ##STR1## wherein (b) about 0.01 to 10% by weight of a modified aromatic hydrocarbon-formaldehyde resin produced by modifying an aromatic hydrocarbon-formaldehyde resin which is obtained by reacting alkyl benzene with formaldehyde, using a modifying agent reactive with its methylol group, methylene ether group, or acetal group;(c) about 2 to 30% by weight of a rubber-like polymer; and(d) about 20 to 80% by weight of a polyamide resin; and a method for its preparation.

Abstract: A radiation-curable ink composition contains a vehicle mixture comprising: (A) at least one linear polyester oligomer and/or polymer substantially free of an acid group and free of a polymerizable double bond in a molecule, wherein 1 to 10 double bonds are pendent from the linear polyester chain, and/or mixture thereof, (B) at least one single double bond-containing carboxylic acid wherein the acid has at least one acid group, and/or carboxylic ester of the said acid, and/or carboxylic amide of the said acid, and/or mixture thereof, (C) a double bond-containing polycarboxylic ester, wherein 2 to 10 acid groups are present and at least 2 double bonds are pendent from the ester having 2 to 10 acid groups, (D) at least one double bond-containing fluorinated carboxylic ester, and/or block copolymer comprising a fluorinated alkyl group-containing polymer segment and a (meth)acrylic polymer segment, and/or block copolymer comprising a siloxane group-containing polymer segment and a (meth)acrylic polymer segment, an

Abstract: A mobile unit communication system comprises: mobile units; a TDMA base station for transmitting and receiving a TDMA signal having a first frame to/from mobile units within a service area thereof in a TDMA/TDD manner; and a CDMA base station adjacent to the TDMA base station, for transmitting and receiving a CDMA signal having a second frame to/from mobile units in a CDMA/TDD manner, at least one of these base stations having a frame synchronizing circuit for detecting a phase between the first and second frames and synchronizing the first and second frames according to the detected phase. Each mobile unit has a first circuit for communicating with the TDMA base station in a TDMA mode; and a second circuit for communicating with the CDMA base station in a CDMA mode. First and second frames have the same length and are synchronized to eliminate the necessity of synchronizing operation when the mobile unit moves to the other service area.

Abstract: A water-based surface treatment agent is used to provide a chemical layer on a copper or copper alloy printing wiring board (PWB). The chemical layer shows excellent heat-resistance and moisture-resistance. The treated PWB maintains excellent solderability for extended lengths of time. The water-based surface treatment agent contains as an active ingredient 2,4-diphenylimidazole, 2,4-diphenyl-5-methylimidazole or 2-phenyl-4-benzyl-5-methylimidazole. The treating compositions with a lower carboxylic acid of up to 4 carbon atoms are soluble in water, and have improved solder wetting properties and improved solder paste spreading property. A copper compound may be included in the aqueous solution to increase the rate at which the chemical layer is formed.

Abstract: In addition to a structure of a conventional CDMA/TDD radio communication system, a base station includes a pilot signal generating circuit for generating a pilot signal that has a constant transmission power level and is known in mobile units and a pilot channel spreading circuit for transmitting the pilot signal to the mobile units through a transmission line. Each of the mobile units includes a pilot signal reception level measuring circuit for measuring reception power of the received pilot signal and a transmission power control circuit for controlling transmission power of a power amplification circuit based on the measured reception power of the received pilot signal.

Abstract: There is provided a process for preparing a ferromagnetic material, wherein at least 2 kinds of paramagnetic compounds preferably organic paramagnetic compounds, capable of manifesting a so-called mesophase between a solid phase, and a liquid phase are mixed with each other in a liquid phase or mesophase state. Preferred paramagnetic compounds are compounds containing a paramagnetic metal complex moiety in the molecular skeleton thereof, and a preferred complex moiety is a porphyrin complex. Preferred metal nuclei are Cu, V, Co, Mo, Ag, and Fe. The planes of the molecules of each of the paramagnetic metal porphyrin complexes in a mesophase thereof are oriented in parallel with each other on a time-average basis.

Abstract: An error detection method is provided for receiving input data which are attached with error detection codes and then subjected to a convolutional coding operation, subjecting the input data to an error correction Viterbi decoding operation, calculating and storing branch or path metrics and, at the time of detecting an error in the error detection codes, independently detecting either one of a plurality of error detection blocks having the error present therein.

Abstract: A diamond-like carbon (DLC) film is formed on a portion of a reed blade in a high-speed loom which requires the highest wear resistance. When a stainless steel is used as the base material of the reed blade, the DLC film is formed through an intermediate layer comprising, e.g., a titanium carbide layer. Reed blades coated with a DLC film are arranged at the side portions of the reed where wear progresses quickly, while reed blades coated with hard films requiring a relatively low cost, or non-coated reed blades, are arranged in the central portion of the reed, thereby uniforming the blade wear throughout the entire reed. The reed is suitable to many types of fibers, ranging from natural to synthetic and new material fibers.

Abstract: An water-based surface treatment agent used for the copper on a printed wiring board (PWB). Chemical layer formed on PWB shows excellent heat-resistance and moisture-resistance; therefore, the treated PWB preserves excellent soldability for a long time. The water-based surface treatment agent contains, as an active ingredient, a 2-arylimidazole compound represented by the following formula, ##STR1## wherein R is a hydrogen atom or a methyl group, R1 and R2 are hydrogen atoms, lower alkyl groups or halogen atoms, and R3 and R4 are hydrogen atoms, lower alkyl groups, halogen atoms, lower alkoxy groups, di-lower alkylamino groups, cyano groups or nitro groups, ##STR2## wherein R is a hydrogen atom or a methyl group, and R1 and R2 are hydrogen atoms, lower alkyl groups or halogen atoms, but excluding the case where R, R1 and R2 are all hydrogen atoms.

Abstract: In a microwave oscillation apparatus including a negative resistance element, a microstrip line having a first end connected to the negative resistance element and a second end connected to a terminating resistor, and a dielectric resonator magnetically coupled to the microstrip line, a capacitive stub is provided on the microstrip line at a distance (1/4) .lambda..sub.s (2N-1) from the first end thereof, where .lambda..sub.s is a wavelength of a spurious oscillation frequency component and N is a positive integer.