Abstract: A semiconductor device has a semiconductor layer including a channel layer containing indium (In), gallium (Ga), and arsenic (As) and an electron supply layer laminated over the channel layer and containing In, Al, and As. A source electrode and a drain electrode are formed on a surface side of the semiconductor layer, and a gate electrode is formed between them. A positively charged insulating film containing aluminum oxide (AlxOy) (y/x<3/2) having oxygen vacancies is formed on the source electrode side from the gate electrode on the surface side of the semiconductor layer. A part of the insulating film may function as a gate insulating film. The density of a two dimensional electron gas (2DEG) in the channel layer on the source electrode side from the gate electrode is relatively higher than that of the 2DEG on the drain electrode side therefrom because of the insulating film.

Abstract: A work machine includes an engine, a hydraulic pump, a work apparatus driver to receive a pressurized fluid, a hydraulic circuit connecting the hydraulic pump with the work apparatus driver, a control valve in the hydraulic circuit, a relief valve connected to a first portion upstream of the control valve, a drain path connected to a second portion upstream of the first portion, an on-off valve to open and close the drain path, and a controller to control the on-off valve based on a state of the engine. The controller is configured or programmed to keep the on-off valve open after detecting an operation to start the engine until detecting a start of the engine and to close the on-off valve in response to detecting the start of the engine.

Abstract: A semiconductor device includes a semiconductor layer including an electron transit layer and an electron supply layer; a gate electrode, a source electrode and a drain electrode, the gate electrode, the source electrode and the drain electrode being disposed on the semiconductor layer; and a metal film connected to the gate electrode, wherein the semiconductor layer includes an active region, and an inactive region surrounding the active region in plan view, wherein the gate electrode includes, in plan view, a first region overlapping the active region, and two second regions having the first region interposed therebetween, the two second regions both overlapping the inactive region, and wherein the metal film contacts the two second regions.

Abstract: A work machine includes an engine, a hydraulic pump, a work apparatus driver to receive a pressurized fluid, a hydraulic circuit connecting the hydraulic pump with the work apparatus driver, a control valve in the hydraulic circuit, a relief valve connected to a first portion upstream of the control valve, a drain path connected to a second portion upstream of the first portion, an on-off valve to open and close the drain path, and a controller to control the on-off valve based on a state of the engine. The controller is configured or programmed to keep the on-off valve open after detecting an operation to start the engine until detecting a start of the engine and to close the on-off valve in response to detecting the start of the engine.

Abstract: A vehicle seat includes: a seat main body; a lock mechanism portion that restricts a rotational operation of the seat main body; an operation portion that is operated to cause the lock mechanism portion to perform an unlock operation; a first member to which an operation force from the operation portion is transmitted; a second member that transmits the operation force toward the lock mechanism portion; and an intermediate member that is disposed, when the seat main body is slid to a specific position, at a first position at which the intermediate member is engaged with the first member and the second member, the intermediate member being disposed, when the seat main body is slid to a position different from the specific position, at a second position at which the intermediate member is disengaged from the first member and the second member.

Abstract: A work vehicle includes a diesel engine, a heater to heat a gas to be supplied to a combustion chamber of the diesel engine, and a controller to execute an afterglow routine to cause the heater to operate. The controller is configured or programmed to execute the afterglow routine in response to the diesel engine being started, an elapse of a predetermined stop time since an end of a previous execution of the afterglow routine, and the work vehicle being in a warming-up state.

Abstract: A high-frequency circuit board includes: a first insulating layer having a first dielectric constant; a first metal layer provided to stack over the first insulating layer; a second insulating layer provided to stack over the first metal layer, and having a second dielectric constant lower than the first dielectric constant; a second metal layer provided to stack over the second insulating layer, on which a compound semiconductor device is mounted; and first vias penetrating the second insulating layer and connecting the first metal layer with the second metal layer.

Abstract: A work vehicle includes an engine, a transmission to change a received rotational force to a rotational force at a gear ratio that corresponds to a desired vehicle speed and output the changed rotational force, a first operating tool to change the rotation speed of the engine and a deceleration rate of the transmission, a rotation speed controller to control the rotation speed of the engine based on an input provided to the first operating tool, and a second operating tool to receive a holding instruction to hold the rotation speed of the engine constant. In response to the holding instruction being inputted to the second operating tool, the rotation speed controller is configured or programmed to disable control of the rotation speed of the engine which control is based on the input provided to the first operating tool, and hold the rotation speed of the engine constant in accordance with the holding instruction.

Abstract: A semiconductor device includes a protection film having an opening and covering a semiconductor layer, which is formed on a side of a surface of a substrate, on an opposite side of the substrate. An insulating film containing silicon is used for the protection film. A gate electrode is formed in the opening and on a side of a side surface of the semiconductor layer which faces a direction. An insulating film containing metal element is formed between the side surface of the semiconductor layer and the gate electrode. The exposure of the side surface of the semiconductor layer to a gas for dry etching for forming of the opening is suppressed by the insulating film. Furthermore, contact and a short circuit between the gate electrode and the side surface of the semiconductor layer are suppressed. As a result, deterioration in the performance of the semiconductor device is suppressed.

Abstract: A work machine includes an exhaust pipe and an outside air mixing cylinder including a guiding cylinder section and an expanding cylinder section, the guiding cylinder section including an exhaust gas guide path to guide exhaust gas from a downstream end of the exhaust pipe in a discharge direction of the exhaust pipe, the expanding cylinder section including a structure with a cross-sectional area of a flow path thereof that becomes larger in diameter to cause a Coanda effect on the exhaust gas so that the exhaust gas follows an inner surface of the expanding cylinder section.

Abstract: A seat lifter includes: an inner link for changing a height position of an inner lower arm with respect to a floor of a vehicle; an outer link for changing a height position of an outer lower arm with respect to the floor, a coupling rod that couples the inner link to the outer link; a planetary gear mechanism capable of causing the coupling rod to rotate relative to the inner lower arm and the outer lower arm; a drive unit capable of driving the planetary gear mechanism; and a power transmission rod that transmits power of the drive unit to the planetary gear mechanism. One of the planetary gear mechanism and the drive unit is disposed outside the outer lower arm in the width direction. The other of the planetary gear mechanism and the drive unit is disposed outside the inner lower arm in the width direction.

Abstract: A compound semiconductor device includes a carrier supply layer, a channel layer disposed over the carrier supply layer and configured to include InGaAs, and an etching stopper layer disposed over the channel layer, and configured to include a first layer disposed over the channel layer and configured to include Inx1Ga1-x1P, and a second layer disposed over the first layer and configured to include Inx2Ga1-x2P, wherein x1 is greater than 0 and less than or equal to 1, x2 is greater than or equal to 0 and less than 1, and x1 is greater than x2.

Abstract: A projection apparatus projects an image on a screen based on input data including information on absolute luminance. The projection apparatus includes: a peak luminance value acquisition unit configured to acquire a peak luminance value on the screen when the projection apparatus projects an image on the screen at a maximum output gradation value; a reference luminance value setting unit configured to set a reference luminance value to be higher than the peak luminance value; a relation information setting unit configured to set, based on the reference and peak luminance values, relation information indicating a relation between an output gradation value and a light output value for displaying an output image; an output gradation value setting unit configured to set an output gradation value based on the input data and the relation information; and an output control unit configured to output an image based on the output gradation value.

Abstract: A semiconductor device includes a substrate having a first surface and a second surface, the second surface being opposite to the first surface, the substrate having an opening formed from the first surface toward the second surface; a semiconductor device layer having a third surface facing the second surface; and a heat transfer member disposed in the opening, the heat transfer member being configured to transfer heat generated by the semiconductor device layer to the first surface, wherein the heat transfer member includes a diamond layer and a metal layer, the diamond layer covering a bottom surface and an inner wall surface of the opening, and the metal layer being disposed on the diamond layer.

Abstract: A tractor includes a body, a link mechanism including a link including an end on a side of the body, and a link attachment mechanism to attach the link to an end of the body in a front-back direction, the link attachment mechanism including a shaft with an axis in a left-right direction and supporting the end of the link such that the link is rotationally movable about the axis, at least one support located on the body and supporting the shaft, and a fixing tool to disable or enable movement of the shaft in the left-right direction relative to the at least one support and to allow the shaft to be pulled out of and inserted into the at least one support in the left-right direction.

Abstract: A seat rotating device includes a base plate, a rotating plate, a coupling unit, and a drive unit. The coupling unit includes a link, a guide having a linearly extending shape, and a moving body that is movable along the guide and supports the rotating plate. The drive unit can move the moving body along the guide. The link includes a fixing end and a rotating end. The guide has a shape extending linearly along a diameter of a virtual circle, the virtual circle having length twice the distance between the fixing end and the rotating end as its radius, and having the fixing end as its center. The moving body moves the rotating plate along the guide while relatively rotating the rotating plate with respect to the moving body.

Abstract: A valve unit (V) has a valve housing (50) that includes a supply oil passage (55) configured to receive operating oil from a hydraulic pump, and a pressure adjustment valve (Va) configured to adjust the pressure of the supply oil passage (55). The pressure adjustment valve (Va) includes a pressure adjustment valve body (61) configured to open and close the supply oil passage (55), a compression coil spring (62) that keeps the pressure adjustment valve body (61) at a closed position when the pressure of the supply oil passage (55) is smaller than a set value and allows the pressure adjustment valve body (61) to open when the pressure of the supply oil passage (55) is not smaller than the set value, and a restriction member (63) configured to, when the pressure adjustment valve body (61) becomes open against the urging force of the spring (62) in response to a pressure of the operating oil, abut against the pressure adjustment valve body (61) to restrict movement of the pressure adjustment valve body (61).

Abstract: A work vehicle includes a vehicle body provided with an engine, a work device provided for the vehicle body and including an actuator supplied with working fluid from a hydraulic pump drivable by the engine, an acceleration setter to set a rotational speed of the engine, and a control lever to operate a control valve for to control the working fluid from the hydraulic pump. The work vehicle also includes an acceleration adjuster that is located at such a position as to be operable with use of a thumb of a hand on a grip portion of a projecting end of the control lever and that allows the rotational speed of the engine to increase in preference to the setting by the acceleration setter.

Abstract: A seat lifter includes: an inner link for changing a height position of an inner lower arm with respect to a floor of a vehicle; an outer link for changing a height position of an outer lower area with respect to the floor; a coupling rod that couples the inner link to the outer link; a planetary gear mechanism capable of causing the coupling rod to rotate relative to the inner lower arm and the outer lower arm; a drive unit capable of driving the planetary gear mechanism; and a power transmission rod that transmits power of the drive unit to the planetary gear mechanism. The planetary gear mechanism is disposed between the inner lower arm and the outer lower arm. The drive unit is disposed outside the inner lower arm in the width direction or outside the outer lower arm in the width direction.

Abstract: A work vehicle includes an engine, a transmission to change a received rotational force to a rotational force at a gear ratio that corresponds to a desired vehicle speed and output the changed rotational force, a first operating tool to change the rotation speed of the engine and a deceleration rate of the transmission, a rotation speed controller to control the rotation speed of the engine based on an input provided to the first operating tool, and a second operating tool to receive a holding instruction to hold the rotation speed of the engine constant. In response to the holding instruction being inputted to the second operating tool, the rotation speed controller is configured or programmed to disable control of the rotation speed of the engine which control is based on the input provided to the first operating tool, and hold the rotation speed of the engine constant in accordance with the holding instruction.