Abstract: A porous carbon sheet including at least carbon fibers, having a thickness of 30 to 95 ?m, a gas permeation resistance of 0.5 to 8.8 Pa, and a tensile strength of 5 to 50 N/cm, and a gas diffusion electrode substrate including a porous carbon sheet containing at least carbon fibers, at least one surface thereof having a microporous layer containing at least an electric conductive filler, the gas diffusion electrode substrate being dividable in the thickness direction into a smaller pore part and a larger pore part, the larger pore part having a thickness of 3 to 60 ?m.

Abstract: A porous carbon sheet includes a carbon fiber and a binding material, wherein when in a measured surface depth distribution, a ratio of an area of a portion having a depth of 20 ?m or less in a measured area of one surface is a surface layer area ratio X, and a ratio of an area of a portion having a depth of 20 ?m or less in a measured area of another surface is a surface layer area ratio Y, the surface layer area ratio X is larger than the surface layer area ratio Y, and a difference between the surface layer area ratios is 3% or more and 12% or less.

Abstract: The purpose of the present invention is to provide a carbon sheet that is suitably employed in a gas-diffusion-electrode substrate that has excellent flooding resistance and with which it is possible to suppress internal peeling of the carbon sheet. In order to achieve the aforementioned purpose, the present invention has the following configuration.

Abstract: A porous carbon sheet contains carbon fiber and a binder, wherein the carbon sheet is characterized in that in a section from a plane having a 50% filling ratio closest to one surface to a plane having a 50% filling ratio closest to the other surface, when letting layer X be a layer with the largest filling ratio close to the one surface, layer Y be a layer with a filling ratio smaller than layer X close to the other surface, and layer Z be the layer positioned between layer X and layer Y for layers obtained by dividing the carbon sheet equally into three in a direction perpendicular to the surfaces, the filling ratio for the layers becomes smaller in order of layer X, layer Y, and layer Z.

Abstract: A porous carbon sheet including at least carbon fibers, having a thickness of 30 to 95 ?m, a gas permeation resistance of 0.5 to 8.8 Pa, and a tensile strength of 5 to 50 N/cm, and a gas diffusion electrode substrate including a porous carbon sheet containing at least carbon fibers, at least one surface thereof having a microporous layer containing at least an electric conductive filler, the gas diffusion electrode substrate being dividable in the thickness direction into a smaller pore part and a larger pore part, the larger pore part having a thickness of 3 to 60 ?m.

Abstract: The purpose of the present invention is to provide a carbon sheet that is suitably employed in a gas-diffusion-electrode substrate that has excellent flooding resistance and with which it is possible to suppress internal peeling of the carbon sheet. In order to achieve the aforementioned purpose, the present invention has the following configuration.

Abstract: Flame-resistant paper for radio wave absorber members includes 40 to 70% by mass of pulp; 5 to 50% by mass of aluminum hydroxide powder; and 3 to 15% by mass of a flame retardant consisting of a polyborate, wherein the flame retardant consisting of a polyborate is contained in an amount of 7 to 25% by mass relative to the amount of the pulp.

Abstract: A porous carbon sheet contains carbon fiber and a binder, wherein the carbon sheet is characterized in that in a section from a plane having a 50% filling ratio closest to one surface to a plane having a 50% filling ratio closest to the other surface, when letting layer X be a layer with the largest filling ratio close to the one surface, layer Y be a layer with a filling ratio smaller than layer X close to the other surface, and layer Z be the layer positioned between layer X and layer Y for layers obtained by dividing the carbon sheet equally into three in a direction perpendicular to the surfaces, the filling ratio for the layers becomes smaller in order of layer X, layer Y, and layer Z.

Abstract: A porous carbon sheet includes a carbon fiber and a binding material, wherein when in a measured surface depth distribution, a ratio of an area of a portion having a depth of 20 ?m or less in a measured area of one surface is a surface layer area ratio X, and a ratio of an area of a portion having a depth of 20 ?m or less in a measured area of another surface is a surface layer area ratio Y, the surface layer area ratio X is larger than the surface layer area ratio Y, and a difference between the surface layer area ratios is 3% or more and 12% or less.

Abstract: Flame-resistant paper for radio wave absorber members includes 40 to 70% by mass of pulp; 5 to 50% by mass of aluminum hydroxide powder; and 3 to 15% by mass of a flame retardant consisting of a polyborate, wherein the flame retardant consisting of a polyborate is contained in an amount of 7 to 25% by mass relative to the amount of the pulp.

Abstract: An electromagnetic wave absorber has a configuration in which at least three hollow tetrahedrons, each having one open face, are connected to one another so that each surface opposite to a respective open face of the hollow tetrahedrons defines a respective side face of a hollow pyramid. Preferably, the electromagnetic wave absorber is made of sheet electromagnetic wave absorption members, which have a corrugated board structure in which at least one sheet includes an electrically conductive material. The electromagnetic wave absorber is low-cost, has reduced transport volume, excellent electromagnetic wave absorption characteristics from low frequency to high frequency with a shorter absorber length, has no or small difference in characteristics due to polarization plane, is lightweight and high in structural strength, and easy to manufacture and install.

Abstract: An attractive facial image determining system, including a first detecting section for detecting lateral angle points of both eyes in a facial image; a second detecting section for detecting oral angle points; a constructing section for constructing a rectangle which is formed of a line segment made by a side that passes through the lateral angle points of both eyes detected by the first detecting section, and an opposed line segment that passes through both oral angle points detected by the second detecting section; and a determining section which obtains a ratio of a long side and a short side of the rectangle obtained via the constructing section, and determines whether the ratio is within a predetermined range.

Abstract: An electromagnetic wave absorber has a configuration in which at least three hollow tetrahedrons, each having one open face, are connected to one another that each surface opposite to a respective open face of the hollow tetrahedrons defines a respective side face of a hollow pyramid. Preferably, the electromagnetic wave absorber is made of sheet electromagnetic wave absorption members, which have a corrugated board structure in which at least one sheet includes an electrically conductive material. The electromagnetic wave absorber is low-cost, has reduced transport volume, excellent electromagnetic wave absorption characteristics from low frequency to high frequency with a shorter absorber length, has no or small difference in characteristics due to polarization plane, is lightweight and high in structural strength, and easy to manufacture and install.

Abstract: An image processing system, including: a first detecting system for detecting lateral angle points of both eyes in a facial image; a second detecting section for detecting oral angle points; and a constructing section for constructing a rectangle which is formed of a line segment made by a side that passes through the lateral angle points of both eyes detected by the first detecting section, and an opposed line segment that passes through both oral angle points detected by the second detecting section.

Abstract: In the process of drawing/heat treating synthetic fiber thread melted and spun via a plurality of godet rollers and subsequently winding the same, accumulation of extraneous matter on the surface of the godet rollers may be prevented by performing multistage drawing/heat treatment while reciprocating the thread in the direction of the axis of rotation of the godet roller using the godet rollers at least two of which have surfaces having the roughness of 0.5≦Ra≦5 and one of which has a surface at a temperature of at least (melting point of synthetic fiber−70° C.), whereby occurrence of thread breakage or generation of fuzz may be prevented and synthetic fiber whereof the rate of operation can be increased and efficiency of manufacture is improved may be obtained.