Abstract: Provided is a surface-protective coating composition capable of forming a surface-protective coating film in which the occurrence of cracks is suppressed during the formation of the coating film, while using a polymer having marine biodegradability. Also provided are: a surface-protective coating film formed from the surface-protective coating composition; a substrate with a surface-protective coating film, which is coated with the surface-protective coating film, and a method of producing the same; and a surface protection method using the surface-protective coating film. The surface-protective coating composition according to the present invention contains a polycaprolactone-based polymer (A) and a zinc oxide (B), wherein the polycaprolactone-based polymer (A) has an acid value of 5 mgKOH/g or more and 200 mgKOH/g or less, and a structural unit derived from caprolactone in the polycaprolactone-based polymer (A) has a content of 50% by mass or more and 99.5% by mass or less.

Abstract: An antifouling coating composition, an antifouling coating film, a substrate with an antifouling coating film or a method for producing the same, an antifouling method for a substrate, or a method for repairing a substrate with an antifouling coating film. The antifouling coating composition includes a hydrolyzable copolymer (A) containing an organosiloxane block and a metal ester group, and zinc oxide (B). The copolymer (A) contains 5 to 25% by mass of a constituent unit derived from a metal ester group-containing monomer, 5 to 15% by mass of a constituent unit derived from a monomer represented by formula (2), and a constituent unit derived from a monomer represented by formula (3).

Abstract: A variable power distributor capable of calculating an error between transmission lines of two systems after building a variable power distributor and correcting the set value of the amplitude and the phase according to the error, an error detection method for the variable power distributor, and a set value correction method is provided. The variable power distributor includes: a two-way distributor provided on an input side of a set of transmission lines consisting of a first and a second transmission line; a 90-degree hybrid circuit provided on an output side of the set of transmission lines; and a variable phase shifter, variable resistance attenuator, and a power amplifier provided on each line of the set of transmission lines between the two-way distributor and the 90-degree hybrid circuit.

Abstract: A band rejection filter with attenuation poles includes a plurality of series resonant circuits having end terminals connected in common and other end terminals connected in series via a plurality of transmission lines each having a length that is an odd multiple of about the one-quarter wavelength at the resonance frequency of the plurality of series resonant circuits, and a jump-coupling circuit for roughly coupling two of the plurality of series resonant circuits, which are not adjacent to each other, to each other.

Abstract: An object of the present invention is to provide a variable power distributor capable of calculating an error between transmission lines of two systems after building a variable power distributor and correcting the set value of the amplitude and the phase according to the error, an error detection method for the variable power distributor, and a set value correction method. The variable power distributor includes: a two-way distributor provided on an input side of a set of transmission lines consisting of a first and a second transmission line; a 90-degree hybrid circuit provided on an output side of the set of transmission lines; and a variable phase shifter, variable resistance attenuator, and a power amplifier which are provided on each of the set of the transmission lines between the two-way distributor and the 90-degree hybrid circuit.

Abstract: A band rejection filter with poles includes a plurality of series resonant circuits having end terminals connected in common and other end terminals connected in series via a plurality of transmission lines each having a length that is an odd multiple of about the one-quarter wavelength at the resonance frequency of the plurality of series resonant circuits, and a jump-coupling circuit for roughly coupling two of the plurality of series resonant circuits, which are not adjacent to each other, to each other.

Abstract: In an electronic circuit device having such a structure that a plurality of circuit boards are stacked, when the circuit boards are stacked, one ends of metal pieces serving as spacers are joined to one circuit board by solder while the other ends of the metal pieces are joined to the other circuit by conductive adhesive agent, whereby the circuit boards can be easily separated from each other at the connection portion and a rework of the parts sandwiched between the circuit boards can be easily performed.

Abstract: An alumina-zirconia sintered body comprising 92 to 35% by weight of aluminum oxide and 8 to 65% by weight of zirconium oxide having mainly tetragonal system, and 0.2 to 5 parts by weight of silicon oxide per 100 parts by weight of the total of aluminum oxide and zirconium oxide, and having a relative density of 95% or more, has improved wear resistance and suitable for use in an impact grinder.

Abstract: An alumina-zirconia sintered body comprising 92 to 35% by weight of aluminum oxide and 8 to 65% by weight of zirconium oxide having mainly tetragonal system, and 0.2 to 5 parts by weight of silicon oxide per 100 parts by weight of the total of aluminum oxide and zirconium oxide, and having a relative density of 95% or more, has improved wear resistance and suitable for use in an impact grinder.

Abstract: A first rotor disk (21) and a second rotor disk (22) having a plurality of crushing pins (30) mounted so as to form rows along the circumference are opposed to each other and rotatably supported within casings (14, 15). The first and second rotor disks (21, 22) are rotated to crush materials to be crushed which are charged into the casings (14, 15). The crushing pins (30) are mounted on the first and second rotor disks (21, 22) in a cantilever manner. Escape spaces are provided on the first and second rotor disks (21, 22) so as to face to the extreme ends of the crushing pins (30).

Abstract: A vacuum coating apparatus for forming a thin film evenly coated over a material to be treated as well as providing excellent productivity. The vacuum coating apparatus includes a chamber, an evacuating device, a fluid supplier, a hood, and a gas reservoir. During operation, the chamber is subjected to a partial vacuum by the evacuating device and filled with treatment fluid. At this time, air at predetermined temperature supplied from the gas reservoir is admitted into the chamber. As a result, the temperature and viscosity of the treatment fluid in the chamber become constant. The material to be treated is then fed into the chamber via an inlet port and an outlet port. An air flow caused by evacuation removes excess fluid on the material at the outlet port, resulting in evenly forming a thin coating film.

Abstract: An information recording/reproducing apparatus for an information storage medium comprising sectors each having a data area composed of a read-only data area and a writable data area. Data in the read-only data area are formed through pressing or the like, and when the data in the read-only data area are to be renewed, renewed data are recorded in the writable data area so that it is made possible to form a large quantity of correctable read-only data.

Abstract: An information recording and reproducing apparatus for recording information on the recording medium and reproducing the information from the recording medium has a data recording region of a sector structure in which the region is divided into a plurality of sectors. There are provided means for designating alternate sector to be used in place of a defective sector and means for adding to data a logical address of a sector where the data is to be recorded. Reproduction from the sector where the desired data is recorded can be accomplished by using only a physical address without being influenced by difference between the physical address and the logical address brought about by the occurrence of the defective sector.