Abstract: An aircraft fuel tank capable of suppressing electrostatic charging caused, for example, by flow electrification with the fuel. The aircraft fuel tank comprises an upper skin (5) and a lower skin (7) that exhibit conductivity and form a portion of a container for storing fuel, an internal structure (19) formed from a metal, and an inner surface layer (15) which has semiconductor properties or insulating properties and is formed in an integral manner on the inner surfaces of the upper skin (5) and the lower skin (7) in a location where the internal structure (19) contacts the upper skin (5) and the lower skin (7), and in the surrounding portion thereof, wherein the inner surface layer (15) is formed, at least in the surrounding portion, from a material having semiconductor properties.

Abstract: Provided is an oil or fat composition of high diacylglycerol content. Even when used in cooking, the cooked food has a good external appearance without darkening, and retains its inherent flavor. Even when used in cooking after storage under light-exposed conditions, the cooked food is provided with a good external appearance and flavor. The oil or fat composition is obtained by combining, at specific contents, (A) an oil or fat of high diacylglycerol content, said oil or fat having a particular composition, (B) a plant sterol and (C) a plant sterol fatty acid ester.

Abstract: A polyimide wherein a tetracarboxylic dianhydride including 3,3?,4,4?-phenyltetracarboxylic dianhydride as the essential component is the starting tetracarboxylic dianhydride component, and an amine comprising between 0.5 and 30 mole percent of a diamine represented by the following general formula is the starting diamine component. (wherein A is a direct bond or a crosslinking group, and R1-R4 each represent a substituent). It is possible to obtain a polyimide, a polyimide film and a laminated body with an improved adhesion property and an improved moisture permeation rate, even without surface treatment, comprising, as the essential tetracarboxylic dianhydride, 3,3?,4,4?-biphenyltetracarboxylic dianhydride which has conventionally only yielded polyimides with low adhesive strength.

Abstract: To provide a power conversion equipment which can detect short circuit failure of series connected capacitors of a smoothing capacitor circuit 4. A capacitor failure detecting circuit is composed of the combination of switch units 7SW, exciting resistors 8R, contact resistors 9R, and diodes 10D. The switch unit 7SW is provided with an exciting circuit and a contact circuit, and when a predetermined current flows through the exciting circuit the contact circuit is closed. The exciting circuit of the switch unit 7SW and the exciting resistor 8R are alternately connected in series, and the contact circuit and the contact resistor 9R are alternately connected in series, corresponding to the number of the series connected capacitors, and these series circuits are connected in parallel with the capacitors.

Abstract: A fuel gauge (15) provided with a columnar inner structural body (27) that is formed of an insulator; a hollow-cylindrical outer structural body (23) that is formed of an insulator and disposed on the outer circumference side of the inner structural body (27) over the entire circumference thereof and at a distance therefrom; an inner electrode (29) that is attached to an outer circumferential surface of the inner structural body (27); and an outer electrode (25) that is attached to an inner circumferential surface of the outer structural body (23); which measures the capacitance between the inner electrode (29) and the outer electrode (25) and detects the level of fuel that exists between the inner electrode (29) and the outer electrode(25), wherein the outer structural body (23) is provided with a plurality of outer through-holes (31) that allow electric charge to move from an outer circumferential surface thereof to the outer electrode (25).

Abstract: Provided is a coating material that can prevent galvanic corrosion and is resistant to electrostatic charging. An antistatic coating comprising a primer containing either an inorganic fiber comprising Si, Ti or Zr, C, and O, or an Ag filler. Further, a structure made of a composite material which is resistant to galvanic corrosion and electrostatic charging is obtained by applying the antistatic coating containing either an inorganic fiber comprising Si, Ti or Zr, C, and O, or an Ag filler to the surface of the structure made of a composite material to form a layers.

Abstract: Disclosed is a polyimide film having improved adhesiveness to an adhesive and/or adherence to a metal layer. The polyimide film has at least a polyimide layer (b) and a polyimide layer (a) formed contacting the polyimide layer (b), wherein the polyimide layer (a) is a polyimide formed from a tetracarboxylic dianhydride component and a diamine component containing a diamine compound represented by general formula (1): wherein R1 denotes a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or an aryl group, and R2 denotes an alkyl group having 1 to 12 carbon atoms or an aryl group.

Abstract: A polyimide film for production of a wiring board having a metal wiring, which is formed by forming a metal layer on one side (Side B) of the polyimide film, and etching the metal layer; the polyimide film is curled toward the side (Side A) opposite Side B; and the curling of the polyimide film is controlled so as to reduce the drooping of the wiring board having a metal wiring formed thereon. The handling characteristics and productivity in IC chip mounting may be improved by the use of the polyimide film.

Abstract: A thermosetting solution composition composed of a biphenyltetracarboxylic acid compound containing a partial lower aliphatic alkyl ester of 2,3,3?,4?-biphenyltetracarboxylic acid and/or a partial lower aliphatic alkyl ester of 2,2?,3,3?-biphenyltetracarboxylic acid, an aromatic diamine compound in a molar amount larger than a molar amount of the biphenyltetracarboxylic acid compound, a partial lower aliphatic alkyl ester of 4-(2-phenylethynyl)phthalic acid compound in a molar amount as much as 1.8-2.2 times a molar amount corresponding to a difference between the molar amount of the aromatic diamine compound and the molar amount of the biphenyltetracarboxylic acid compound, and an organic solvent composed of a lower aliphatic alcohol is of value for manufacture of a prepreg.

Abstract: A polyimide film having improved adhesiveness is produced by flow-casting a solution of a polyamic acid, which is prepared by reacting a tetracarboxylic acid component and a diamine component, on a support, and drying the solution to form a self-supporting film; applying a solution containing a surface treatment agent to one side or both sides of the self-supporting film, wherein the solvent of the surface treatment agent solution is a water-soluble liquid and has a surface tension of 32 mN/m or less at 20° C. and a boiling point of 125° C. or higher; and heating the self-supporting film to provide a polyimide film.

Abstract: A CIS solar cell having flexibility and high conversion efficiency may be produced, using, as a substrate, a polyimide film which is prepared from an aromatic tetracarboxylic acid component comprising 3,3?,4,4?-biphenyltetracarboxylic dianhydride as the main component and an aromatic diamine component comprising p-phenylenediamine as the main component, and has a maximum dimensional change in the temperature-increasing step of from 25° C. to 500° C. within a range of from +0.6% to +0.9%, excluding +0.6%, based on the dimension at 25° C. before heat treatment.

Abstract: A steering mechanism is provided on an equilateral triangular base of a mobile mechanism, and three joints are attached to the base at the three vertexes thereof. Links are attached to the three joints respectively. On each link is provided a steering mechanism. The equilateral triangular base of the mobile mechanism is moved or rotated by periodically driving the three joints while steering the four steering mechanisms.

Abstract: A tubular filter suitable for capturing and removing, in a continuous production line, solid content and oil content in a large volume of liquid (particularly a beverage liquid). A tubular liquid-treating filter formed by winding a nonwoven fabric layer together with a reinforcing net sheet, wherein the reinforcing net sheet has a mesh size in the range from 6 to 35 mesh and includes a portion having a thickness in the range from 0.3 to 2.0 mm.

Abstract: An imaging apparatus includes: a display unit that displays an image photographed by an imaging element; and a focus control unit that performs focus control of inputting information regarding a selected image region of the image displayed on the display unit and setting a subject contained in the selected image region as a focusing target. The focus control unit performs the focus control by determining a driving speed of a focus lens based on information regarding an operation of a user and moving the focus lens at the determined driving speed of the focus lens.

Abstract: A polyimide film, which is produced by the reaction of a tetracarboxylic acid component comprising 3,3?,4,4?-biphenyltetracarboxylic dianhydride as the main component and a diamine component comprising p-phenylenediamine as the main component, is heated at a temperature of from 460° C. to 550° C., and then water or an alkaline aqueous solution is sprayed on a surface of the polyimide film for surface treatment, thereby improving adhesiveness, while maintaining the excellent properties inherent in the polyimide film.

Abstract: An image capturing device includes an assistant image synthesizing unit that changes a degree of transparency of a first assistant image in a transparent background area set in a second assistance image, when generating a synthesized assistant image by synthesizing the first and second assistant images providing assistance information for capturing, and a display control unit that overlaps the synthesized assistant image with a captured image and displays the image on a display unit.

Abstract: To improve particle capturing performance and classification filtering capacity of a cylindrical filter. A cylindrical filter includes a hollow cylindrical filter body configured by suitably combining a plurality of cylindrical first filter sections having mutually different inner diameters, each first filter section including a glass fiber as a major component, and a plurality of cylindrical second filter sections having mutually different inner diameters, each second filter section including a resin fiber as a major component, with each other. The first filter sections and the second filter sections are disposed in a concentrically superimposed manner and alternately arranged in a radial direction relative to each other. The cylindrical filter further includes a pair of seal members fixedly provided on the opposite axial ends of the first and second filter sections.

Abstract: A composite tank that can suppress electrification, corrosion and strength degradation, a wing comprising the composite tank, and a method for manufacturing the composite tank.

Abstract: An aircraft fuel tank capable of suppressing electrostatic charging caused, for example, by flow electrification with the fuel. The aircraft fuel tank comprises an upper skin (5) and a lower skin (7) that exhibit conductivity and form a portion of a container for storing fuel, an internal structure (19) formed from a metal, and an inner surface layer (15) which has semiconductor properties or insulating properties and is formed in an integral manner on the inner surfaces of the upper skin (5) and the lower skin (7) in a location where the internal structure (19) contacts the upper skin (5) and the lower skin (7), and in the surrounding portion thereof, wherein the inner surface layer (15) is formed, at least in the surrounding portion, from a material having semiconductor properties.

Abstract: An aircraft fuel tank that is capable of suppressing the occurrence of sparks on a pipe caused by a lightning current through the pipe during a lightning strike, and also suppressing static electricity charging of a pipe caused by flow electrification generated by the fuel. An aircraft fuel tank (1) in which a storage section is formed using a conductive upper skin (5), a conductive lower skin (7) and conductive spars (9), the tank comprising: pipes inside the tank, such as a refuel pipe (17), an engine feed pipe (19) and an inert gas pipe (21), which are disposed inside the storage section and are earthed (27) at a plurality of locations, and pipe outer surface layers (31) having semiconductor properties that are formed in an integrated manner on the outer surfaces of the pipes inside the tank such as the replenishing pipe (17), the supply pipe (19) and the gas pipe (21).