Abstract: In a photoelectric conversion device, the meta-surface includes a first antenna portion, a first bias portion, a second antenna portion, and a second bias portion. The first antenna portion extends in a first direction and emits an electron in response to incidence of the electromagnetic wave. The first bias portion faces the first antenna portion and is configured to generate an electric field having a component in the first direction between the first bias portion and the first antenna portion. The second antenna portion extends in a second direction intersecting the first direction and emits an electron in response to incidence of the electromagnetic wave. The second bias portion faces the second antenna portion and is configured to generate an electric field having a component in the second direction between the second bias portion and the second antenna portion.

Abstract: In a photoelectric conversion device, the potential control unit controls electric potentials applied to the meta-surface. The meta-surface includes a plurality of patterns which are space away from each other. The plurality of patterns include an antenna portion and at least one bias portion. The antenna portion extends in a predetermined direction and emits the electron in response to incidence of the electromagnetic wave. The potential control unit switches a first state and a second state by controlling the electric potentials applied to the plurality of patterns. In the first state, a component of an electric field from the bias portion toward the antenna portion in a predetermined direction is positive. In the second state, a component of an electric field from the bias portion toward the antenna portion in the predetermined direction is negative.

Abstract: A photoelectric conversion device is provided with an electron emitter including a meta-surface emitting an electron in response to incidence of an electromagnetic wave. The meta-surface includes a plurality of photoelectric conversion units having a sensitivity for electromagnetic waves having mutually different wavelength regions. The plurality of photoelectric conversion units respectively include patterns having mutually different configurations.

Abstract: A solid-state imaging device capable of achieving higher image quality is provided. Provided is a solid-state imaging device including a semiconductor substrate, a first photoelectric conversion unit that is provided above the semiconductor substrate and that converts light into charge, and a second photoelectric conversion unit that is provided above the first photoelectric conversion unit and that converts light into charge. Each of the first photoelectric conversion unit and the second photoelectric conversion unit includes at least a first electrode, a second electrode, and a photoelectric conversion film disposed between the first electrode and the second electrode. The first electrode of the second photoelectric conversion unit and a charge accumulation unit formed in the semiconductor substrate are electrically connected to each other via a conductive portion penetrating at least the first photoelectric conversion unit.

Abstract: The present invention provides a silicon nitride sintered substrate capable of reducing contamination caused by a boron nitride powder or the like used as a releasing agent and problems in bonding strength and dielectric strength at the time of laminating metal layers or the like, where the contamination is caused by a network structure provided by a silicon nitride crystal formed on the surface of the substrate in an unpolished state after sintering a silicon nitride powder. The silicon nitride substrate in an unpolished state after sintering is a silicon nitride sintered substrate where a cumulative volume of pores having a diameter in a range of 1 to 10 ?m is not more than 7.0'10?5 mL/cm2 in a measurement by a mercury porosimetry. Preferably, Ra of the surface is not more than 0.6 ?m and arithmetic mean peak curvature (Spc) of a peak is not more than 4.5 [l/mm].

Abstract: A silicon nitride powder for sintering which, despite of its fine powdery form, shows a very small increase in the oxygen concentration with time and features excellent storage stability. The silicon nitride powder for sintering has a specific surface area of 5 to 30 m2/g, and is characterized by having a hydrophobicity (M value) of 30 or more and an increase in the oxygen concentration of 0.30% by mass or less after left to stand in the air of a humidity of 90% and 20° C. for 48 hours. The silicon nitride powder for sintering can be obtained by dry-pulverizing aggregated masses of the silicon nitride in an inert atmosphere in the presence of a silane coupling agent.

Abstract: A motorcycle frame includes a head pipe, a pair of front main frames, and a pair of rear main frames. The pair of front main frames separates in a vehicle width direction from the head pipe, extends toward a power engine that is located on a rear side of the head pipe, and includes power-engine fixing parts that are fixed to the power engine at positions that overlap with the power engine as viewed in the vehicle width direction. The pair of rear main frames extends rearward from the power-engine fixing parts of the pair of front main frames.

Abstract: A motorcycle includes a fuel tank, an engine, an air cleaner box, and an electrical component unit. The fuel tank stores a fuel. The engine is driven by the fuel stored in the fuel tank. The air cleaner box purifies air to be supplied to the engine. The electrical component unit includes two or more types of electrical components driven by electricity. The fuel tank and the engine are arranged vertically one above the other. At least part of the air cleaner box is positioned in a space between the fuel tank and the engine. The longitudinal position of at least part of the electrical component unit is more frontward than the rear end of the fuel tank and more rearward than the air cleaner box.

Abstract: A straddle vehicle is capable of discharging high-temperature outdoor air having passed through a radiator with high efficiency. A motorcycle 1 includes a radiator, a fan, and a fan shroud. The radiator lowers the temperature of a coolant by heat exchange between outdoor air and the coolant. The fan suctions outdoor air, to make the outdoor air hit the radiator arranged upstream in an outdoor air flow direction. The fan shroud covers at least part of the fan, and discharges high-temperature outdoor air, which is outdoor air suctioned by the fan and having passed through the radiator, to outside. The fan shroud has a discharge opening and an air guide. The discharge opening allows the high-temperature outdoor air to be discharged outside. The air guide guides the high-temperature outdoor air such that it is discharged through the discharge opening in a direction including a laterally outward component.

Abstract: A motorcycle includes a fuel tank, an engine, an air cleaner box, and an electrical component unit. The fuel tank stores a fuel. The engine is driven by the fuel stored in the fuel tank. The air cleaner box purifies air to be supplied to the engine. The electrical component unit includes two or more types of electrical components driven by electricity. The fuel tank and the engine are arranged vertically one above the other. At least part of the air cleaner box is positioned in a space between the fuel tank and the engine. The longitudinal position of at least part of the electrical component unit is more frontward than the rear end of the fuel tank and more rearward than the air cleaner box.

Abstract: A straddle vehicle is capable of discharging high-temperature outdoor air having passed through a radiator with high efficiency. A motorcycle 1 includes a radiator, a fan, and a fan shroud. The radiator lowers the temperature of a coolant by heat exchange between outdoor air and the coolant. The fan suctions outdoor air, to make the outdoor air hit the radiator arranged upstream in an outdoor air flow direction. The fan shroud covers at least part of the fan, and discharges high-temperature outdoor air, which is outdoor air suctioned by the fan and having passed through the radiator, to outside. The fan shroud has a discharge opening and an air guide. The discharge opening allows the high-temperature outdoor air to be discharged outside. The air guide guides the high-temperature outdoor air such that it is discharged through the discharge opening in a direction including a laterally outward component.

Abstract: A motorcycle frame includes a head pipe, a pair of front main frames, and a pair of rear main frames. The pair of front main frames separates in a vehicle width direction from the head pipe, extends toward a power engine that is located on a rear side of the head pipe, and includes power-engine fixing parts that are fixed to the power engine at positions that overlap with the power engine as viewed in the vehicle width direction. The pair of rear main frames extends rearward from the power-engine fixing parts of the pair of front main frames.

Abstract: A motorcycle comprises a rear wheel; a vehicle body frame including a front frame unit supporting a motor, and a rear frame unit supporting a seat; and a swing arm which is rotatably connected to the front frame unit and supports the rear wheel, wherein the rear frame unit includes: a front section which supports the seat and extends rearward from the front frame unit; a pair of right and left branch sections extending rearward from a rear end portion of the front section to be spaced apart from each other in a rightward and leftward direction; and a pair of rear sections which extend rearward from rear end portions of the pair of right and left branch sections, respectively, and are placed rightward and leftward relative to the rear wheel.

Abstract: A vehicle comprises a fender unit which covers an upper portion of a wheel from above; and a mounting member placed inward in a vehicle width direction relative to the fender unit and including a mounting section by which an accessory component is detachably mounted to a vehicle body, wherein the fender unit includes: a first cover member which has an opening through which the mounting section of the mounting member is exposed, and covers a portion of the mounting member which is other than the mounting section, from outside in the vehicle width direction; and a second cover member which is detachably mounted to the first cover member and covers the opening.

Abstract: A motorcycle comprises a front wheel; a rear wheel; a seat; a vehicle body frame; a swing arm which supports the rear wheel such that the swing arm is vertically pivotable around a location at which the swing arm is connected to a front frame; and a rear suspension which connects the vehicle body frame to the swing arm via a link mechanism, wherein a seat frame includes a pair of rail sections having rear end portions which are placed to be spaced apart from each other on both sides in a vehicle width direction relative to the rear wheel and located above an axle of the rear wheel, and wherein the rear suspension is placed on one side in the vehicle width direction relative to a vehicle body center line extending in a forward and rearward direction and extends in the forward and rearward direction.

Abstract: In a straddle vehicle such as a motorcycle, a harness in an electric power supply system which is thick, has a great weight, and is not easily mounted can be reduced in length as much as possible so that a weight and cost can be reduced, and assembling work can be made easier. An air cleaner and a fuel tank are disposed at a relatively rearward position such that the air cleaner and the fuel tank are disposed behind and distant from the head pipe to provide an electric component mounting space between the air cleaner and the fuel tank, and the head pipe, and a regulator, a relay box and a fuse box are disposed in the electric component mounting space. The fuel tank is disposed at a relatively rearward position such that its rear end portion is positioned behind and below a rear end of a main frame.

Abstract: A vehicle comprises a fender unit which covers an upper portion of a wheel from above; and a mounting member placed inward in a vehicle width direction relative to the fender unit and including a mounting section by which an accessory component is detachably mounted to a vehicle body, wherein the fender unit includes: a first cover member which has an opening through which the mounting section of the mounting member is exposed, and covers a portion of the mounting member which is other than the mounting section, from outside in the vehicle width direction; and a second cover member which is detachably mounted to the first cover member and covers the opening.

Abstract: A motorcycle comprises a rear wheel; a vehicle body frame including a front frame unit supporting a motor, and a rear frame unit supporting a seat; and a swing arm which is rotatably connected to the front frame unit and supports the rear wheel, wherein the rear frame unit includes: a front section which supports the seat and extends rearward from the front frame unit; a pair of right and left branch sections extending rearward from a rear end portion of the front section to be spaced apart from each other in a rightward and leftward direction; and a pair of rear sections which extend rearward from rear end portions of the pair of right and left branch sections, respectively, and are placed rightward and leftward relative to the rear wheel.

Abstract: A motorcycle comprises a front wheel; a rear wheel; a seat; a vehicle body frame; a swing arm which supports the rear wheel such that the swing arm is vertically pivotable around a location at which the swing arm is connected to a front frame; and a rear suspension which connects the vehicle body frame to the swing arm via a link mechanism, wherein a seat frame includes a pair of rail sections having rear end portions which are placed to be spaced apart from each other on both sides in a vehicle width direction relative to the rear wheel and located above an axle of the rear wheel, and wherein the rear suspension is placed on one side in the vehicle width direction relative to a vehicle body center line extending in a forward and rearward direction and extends in the forward and rearward direction.

Abstract: In a straddle vehicle such as a motorcycle, a harness in an electric power supply system which is thick, has a great weight, and is not easily mounted can be reduced in length as much as possible so that a weight and cost can be reduced, and assembling work can be made easier. An air cleaner and a fuel tank are disposed at a relatively rearward position such that the air cleaner and the fuel tank are disposed behind and distant from the head pipe to provide an electric component mounting space between the air cleaner and the fuel tank, and the head pipe, and a regulator, a relay box and a fuse box are disposed in the electric component mounting space. The fuel tank is disposed at a relatively rearward position such that its rear end portion is positioned behind and below a rear end of a main frame.