Abstract: An amplifier includes: a first signal source that outputs a first and a second frequency signals; a second signal source that outputs the first and the second frequency signals; a first amplifier that receives and amplifies the signal output from the first signal source; a second amplifier that receives and amplifies the signal output from the second signal source; and an output combiner that combines the signals amplified by the first amplifier and the second amplifier, and operates so that a phase difference between the first frequency signals input to the first and the second amplifier amplifiers and that between the second frequency signals input to the first and the second amplifiers satisfy a relational equation in which intermodulation distortion components of those are in opposite phases.

Abstract: A control method includes: receiving transaction data that includes (i) peer information used for connecting a first peer among peers in a P2P system to another peer among the peers and (ii) a signature added to the peer information by the first peer; verifying the received transaction data using the signature included in the transaction data; and storing the transaction data into the distributed ledger when the verifying is successful.

Abstract: Provided is a toilet exterior structure of an aircraft lavatory unit. A shroud mount in an upper end outer peripheral plate portion is provided in a lower surface of a main body plate portion. The shroud mount includes space portions extending in the width direction of the main body plate portion between partition walls provided in the main body plate portion. Where the body plate portion is placed in the upper end outer peripheral plate portion, a plurality of air communication passages communicating a space inside of the upper end outer peripheral plate portion in the width direction and a space outside of the upper end outer peripheral plate portion in the width direction are formed by the space portions. Where the main body plate portion is stepped on by a foot, the plurality of partition walls are positioned inside of a contour of the foot.

Abstract: An aircraft water tank is provided. With an aircraft water tank being suspended by a fuselage via bushes, a load applied to each of the bushes is transferred from the bush and an attachment hole to a metal plate. The load transferred to metal plate is transferred to a total of four prepreg projection portions at a section of a thick wall portion of the metal plate and transferred to a total of eight prepreg projection portions at a section of a thin wall portion.

Abstract: Provided is a toilet seat structure for an aircraft lavatory unit. A cushion block is formed of a single band-like body that has a band-like shape extending with a predetermined width along an entire circumference of a toilet seat in a circumferential direction. The band-like body has an elongated cross-sectional shape cut along with a plane orthogonal to the extension direction and includes: a flat upper surface; a flat lower surface; and inclined surfaces provided on both sides in the width direction. The band-like body has the upper surface that is attached to a lower surface of a body plate portion with an adhesive and inclined surfaces that form an obtuse angle with respect to the lower surface of the body plate portion.

Abstract: Provided is a toilet seat structure for an aircraft lavatory unit. A toilet seat cushion block includes an inner and outer band-like bodies. The inner band-like body extends in a band-like shape at a section close to an inner circumference of a lower surface of a toilet seat, and the outer band-like body extends in a band-like shape at a section close to an outer circumference of the lower surface. Air communication passageways communicating with an inside and an outside of a bowl portion include: inner openings provided at an interval in the extension direction of the inner band-like body; an annular space between the inner and outer band-like bodies; and outer openings provided at an interval in the extension direction of the outer band-like body at sections of the outer band-like body, which are shifted from the inner openings in a circumferential direction of the toilet seat.

Abstract: Provided is an aircraft water tank with a lid joined to an opening portion via internal threads and external threads. An O-ring is compressed so that the opening portion is liquid-tightly sealed, which forms a sealed water storage space in a tank body. The portion of the lid that compresses the O-ring is a corner portion formed by an end surface of an annular plate portion and an outer peripheral surface of a tube portion. The portion of an inner liner that compresses the O-ring is a portion of the inner liner attached to an inclined surface. An end portion of the inner liner attached to the surface of a bulging portion is located outside the water storage space.

Abstract: Provided is a toilet seat structure for an aircraft lavatory unit. A toilet seat cushion block includes an inner and outer band-like bodies. The inner band-like body extends in a band-like shape at a section close to an inner circumference of a lower surface of a toilet seat, and the outer band-like body extends in a band-like shape at a section close to an outer circumference of the lower surface. Air communication passageways communicating with an inside and an outside of a bowl portion include: inner openings provided at an interval in the extension direction of the inner band-like body; an annular space between the inner and outer band-like bodies; and outer openings provided at an interval in the extension direction of the outer band-like body at sections of the outer band-like body, which are shifted from the inner openings in a circumferential direction of the toilet seat.

Abstract: An aircraft water tank is provided. With an aircraft water tank being suspended by a fuselage via bushes, a load applied to each of the bushes is transferred from the bush and an attachment hole to a metal plate. The load transferred to metal plate is transferred to a total of four prepreg projection portions at a section of a thick wall portion of the metal plate and transferred to a total of eight prepreg projection portions at a section of a thin wall portion.

Abstract: Provided is a toilet seat structure for an aircraft lavatory unit. A cushion block is formed of a single band-like body that has a band-like shape extending with a predetermined width along an entire circumference of a toilet seat in a circumferential direction. The band-like body has an elongated cross-sectional shape cut along with a plane orthogonal to the extension direction and includes: a flat upper surface; a flat lower surface; and inclined surfaces provided on both sides in the width direction. The band-like body has the upper surface that is attached to a lower surface of a body plate portion with an adhesive and inclined surfaces that form an obtuse angle with respect to the lower surface of the body plate portion.

Abstract: Provided is a toilet exterior structure of an aircraft lavatory unit. A shroud mount in an upper end outer peripheral plate portion is provided in a lower surface of a main body plate portion. The shroud mount includes space portions extending in the width direction of the main body plate portion between partition walls provided in the main body plate portion. Where the body plate portion is placed in the upper end outer peripheral plate portion, a plurality of air communication passages communicating a space inside of the upper end outer peripheral plate portion in the width direction and a space outside of the upper end outer peripheral plate portion in the width direction are formed by the space portions. Where the main body plate portion is stepped on by a foot, the plurality of partition walls are positioned inside of a contour of the foot.

Abstract: A waste bin device of an aircraft lavatory unit is provided. A chute, waste flap, and waste container are formed from a material having fire resistance performance. A fire spreading prevention space that prevents fire from spreading to the outside of a waste bin device main body due to a flame occurring when inserted waste catches fire is formed inside the waste bin device main body at a storing position of the waste container positioned with regard to a lower portion of the chute. A maintaining portion maintains the waste container at a storing position. The maintaining portion includes a first maintaining portion that maintains from a vertical direction a condition where an upper portion of the waste container and lower portion of the chute are aligned, and a second maintaining portion that maintains the condition from a direction orthogonal to the vertical direction, at the storing position.

Abstract: A structure whereby a piping nozzle can be simply attached to a tank body is disclosed. A cylinder of a nozzle body is inserted through the interior and exterior of the tank body via a nozzle body insertion hole in the tank body. A skirt is provided on an end portion of the cylinder, and expands annularly from the end portion of the cylinder in the interior of the tank body. A sealing member is interposed between an inner surface of the tank body and the skirt around the nozzle body insertion hole. A spacer member is disposed on an outer surface of the tank body around the cylinder. By tightening a nut on a male screw of the cylinder of the nozzle body, a portion of the tank body around the nozzle body insertion hole is sandwiched by the skirt of the nozzle body and the spacer member.

Abstract: A waste bin device of an aircraft lavatory unit is provided. A chute, waste flap, and waste container are formed from a material having fire resistance performance. A fire spreading prevention space that prevents fire from spreading to the outside of a waste bin device main body due to a flame occurring when inserted waste catches fire is formed inside the waste bin device main body at a storing position of the waste container positioned with regard to a lower portion of the chute. A maintaining portion maintains the waste container at a storing position. The maintaining portion includes a first maintaining portion that maintains from a vertical direction a condition where an upper portion of the waste container and lower portion of the chute are aligned, and a second maintaining portion that maintains the condition from a direction orthogonal to the vertical direction, at the storing position.

Abstract: A structure whereby a piping nozzle can be simply attached to a tank body is disclosed. A cylinder of a nozzle body is inserted through the interior and exterior of the tank body via a nozzle body insertion hole in the tank body. A skirt is provided on an end portion of the cylinder, and expands annularly from the end portion of the cylinder in the interior of the tank body. A sealing member is interposed between an inner surface of the tank body and the skirt around the nozzle body insertion hole. A spacer member is disposed on an outer surface of the tank body around the cylinder. By tightening a nut on a male screw of the cylinder of the nozzle body, a portion of the tank body around the nozzle body insertion hole is sandwiched by the skirt of the nozzle body and the spacer member.

Abstract: Provided is an aircraft water tank with a lid joined to an opening portion via internal threads and external threads. An O-ring is compressed so that the opening portion is liquid-tightly sealed, which forms a sealed water storage space in a tank body. The portion of the lid that compresses the O-ring is a corner portion formed by an end surface of an annular plate portion and an outer peripheral surface of a tube portion. The portion of an inner liner that compresses the O-ring is a portion of the inner liner attached to an inclined surface. An end portion of the inner liner attached to the surface of a bulging portion is located outside the water storage space.

Abstract: A storage rack is mounted on a wall panel via a reinforcing thin sheet and a synthetic resin rivet. The reinforcing thin sheet is mounted on the inner surface of the surface member at a location at which the storage rack is arranged. A rivet insertion hole is formed penetrating the surface member and the reinforcing thin sheet. Leg pieces of the pre-assembled rivet are inserted into the rivet insertion hole from the mounting hole in the storage rack, and a flange portion is brought into contact with a second vertical panel. An expanding shaft portion of the expansion member (30) is pushed into an inner peripheral portion of an expanded member, forming leg piece parts expanded to a dimension larger than the diameter of the rivet insertion hole on the leg piece parts projecting from the reinforcing thin sheet.

Abstract: A lavatory mirror is attached to a wall board via a plurality of fasteners including synthetic resin female members and synthetic resin male members. The synthetic resin male members are attached at a plurality of locations on a rear surface of the lavatory mirror at intervals, and positioned within the outline of the lavatory mirror. The synthetic resin female members are attached at locations on the wall board corresponding to the male members attached to the rear surface of the lavatory mirror. The plurality of female members includes a female tubular portion inside of which a male tubular portion of the corresponding male members is inserted, whereby a female locking portion and a male locking portion are locked with each other. The lavatory mirror is attached to the wall board with a raised portion abutting on a male mounting board portion of the male member.

Abstract: An aircraft interior panel material includes a core member and surface members attached to both surfaces of the core member. The core member includes a plate member composed of balsa wood and having a rectangular shape and uniform thickness. Both surfaces of the plate member in the thickness direction are flat surfaces. Balsa wood is a light weight natural material whereby environmental impact can be reduced. Both surfaces of the plate member in the thickness direction are impregnated with flame retardant, which reduces the flammability of the balsa wood. Impregnation of the plate member with the flame retardant may be performed by: spraying the flame retardant; by immersing the plate member in the flame retardant; or upon the plate member being immersed in the flame retardant, by applying a pressure larger than the pressure at the depth where the plate member is immersed or cycles thereof to the plate member.

Abstract: A joining structure for an interior panel for an aircraft includes two interior panels, each provided with a corner portion formed on an internal-side surface plate by an edge of an end portion of an external-side surface plate and an edge of an end portion of an internal-side surface plate being attached, the corner portion extending in the direction the edges extend. Strip-shaped connection pieces are provided at the corner portion and are formed across an entire length of the corner portion by a portion, with gaps between the strip-shaped connection pieces. The two interior panels are joined when brought together, with the connection pieces of the two interior panels passing through the gaps between the connection pieces of the other interior panels and being adhered to the external-side surface plate of the other interior panels by an adhesive.