Abstract: An electrophotographic image forming carrier includes core particles and a coating layer coating a surface of the core particles. The coating layer contains antimony-containing particles comprising inorganic fine particles A and antimony-doped tin oxide disposed on a surface of the inorganic fine particles A. The electrophotographic image forming carrier has an apparent density of 2.0 g/cm3 or more and 2.5 g/cm3 or less.

Abstract: A deep groove ball bearing includes an outer ring, an inner ring, a plurality of balls, and a seal member. An axial cross-sectional width is smaller than a radial cross-sectional height, a thickness of the inner ring is greater than a thickness of the outer ring, and a pitch diameter of the ball is larger than a median diameter between an inner diameter of the inner ring and an outer diameter of the outer ring A radial dimension between an outer diameter of a shoulder portion of the inner ring and an inner diameter of the seal member is greater than the thickness of the outer ring. As a result, width and weight can be reduced, a load capacity can be secured, grease leakage can be prevented, and a service lifespan can be extended.

Abstract: A developing apparatus includes an electrostatic latent image bearer, a developing sleeve, a case, and an air filter. The case accommodates a two-component developer and the developing sleeve. The air filter is attached to the case. The air filter has a thickness of 2 to 20 mm and has a density gradient with a pressure loss of 2 to 40 Pa at a wind speed of 10 cm/s. The air filter forms an airflow sucked into the case from a gap between the developing sleeve and the case and forms an airflow discharged from the case through the air filter. The two-component developer accommodated in the case contains a magnetic particle a surface of which is coated with a resin layer. The resin layer contains at least one type of chargeable particle.

Abstract: A vehicle drive device includes a drive shaft to be driven by a drive source, a rotation transmission unit that transmits rotation input from the drive shaft to a wheel, a mechanical oil pump that generates a hydraulic pressure by the rotation of the drive shaft, an electric oil pump that electrically generates a hydraulic pressure, a hydraulic control device that supplies lubricating oil to the rotation transmission unit based on the hydraulic pressures generated by the mechanical oil pump and the electric oil pump, a drive circuit that controls electric power to be supplied to the electric oil pump, and a control unit that controls a drive condition of the drive circuit. The control unit stops the drive circuit and shuts down the electric oil pump when a temperature of refrigerant for cooling the drive circuit is equal to or higher than a third start temperature.

Abstract: A carrier for forming an electrophotographic image contains a core particle and a coating layer coating the core particle, wherein the coating layer contains a particle containing antimony and an anionic dispersant and the particle containing antimony includes a substrate particle containing a first inorganic fine particle.

Abstract: A power system comprises a fuel cell system having a fuel cell stack and a fuel cell water pump, a heat source having a heat source water pump and configured to be actuated to generate heat, a heat radiator for exchanging heat with the atmosphere, a cooling passage thermally connecting the fuel cell system, the heat source, and the heat radiator, and a controller for controlling the fuel cell system, the heat source, and the heat radiator, and the cooling passage.

Abstract: A carrier for electrophotographic image formation includes carrier particles. Each of the carrier particles includes a core particle and a coating layer covering the core particle. The coating layer includes diantimony pentoxide-containing particles.

Abstract: A carrier is provided that includes a core particle and a coating layer coating the core particle. The coating layer includes a resin and chargeable inorganic fine particles, and has voids. The resin has an average film thickness of 0.10 ?m or larger and smaller than 0.45 ?m. The coating layer has a porosity of 0.1% or higher and lower than 2.8%, when the porosity expressed by the following equation: Porosity [%]=S1/S2×100 where, on a cross section of the coating layer, S1 represents a cross sectional area of the voids and S2 represents a cross sectional area of the resin.

Abstract: A developing apparatus includes an electrostatic latent image bearer, a developing sleeve, a case, and an air filter. The case accommodates a two-component developer and the developing sleeve. The air filter is attached to the case. The air filter has a thickness of 2 to 20 mm and has a density gradient with a pressure loss of 2 to 40 Pa at a wind speed of 10 cm/s. The air filter forms an airflow sucked into the case from a gap between the developing sleeve and the case and forms an airflow discharged from the case through the air filter. The two-component developer accommodated in the case contains a magnetic particle a surface of which is coated with a resin layer. The resin layer contains at least one type of chargeable particle.

Abstract: To provide a warming-up system in which a period of time taken to warm up a fuel cell is shorter than that for conventional ones. A warming-up system according to an embodiment includes a fuel cell, a motor, a rotation shaft, a speed reducer, a measuring unit, and a control unit. The motor convert electrical power generated by the fuel cell into a rotative force. The speed reducer brake the rotation shaft that is rotating. The measuring unit measure a temperature of the fuel cell. The control unit is configured to determine whether to perform warming up for the fuel cell, based on the temperature. When the control unit determines to perform the warming up, the control unit causes the motor and the speed reducer to operate, and uses heat generated in the fuel cell and heat generated in the speed reducer to warm up the fuel cell.

Abstract: To provide an electrical power system and an electrical power control device that make it possible to suppress deterioration of a fuel cell compared to that conventional seen. An electrical power system according to an embodiment includes a fuel cell, a heat source, a heat dissipator, and a controller. The fuel cell is configured to generate electrical power through electrochemical reactions to generate first heat. The heat source operates to generate second heat. The heat dissipator is configured to dissipate the first heat and the second heat. The controller is configured to control the fuel cell to allow, when the heat source is in operation, an amount of the first heat to be equal to or below an available heat dissipation capacity acquired by subtracting an amount of the second heat from a maximum amount of heat to be dissipated from the heat dissipator.

Abstract: A power system comprises a fuel cell system having a fuel cell stack and a fuel cell water pump, a heat source having a heat source water pump and configured to be actuated to generate heat, a heat radiator for exchanging heat with the atmosphere, a cooling passage thermally connecting the fuel cell system, the heat source, and the heat radiator, and a controller for controlling the fuel cell system, the heat source, and the heat radiator, and the cooling passage.

Abstract: To provide a warming-up system in which a period of time taken to warm up a fuel cell is shorter than that for conventional ones. A warming-up system according to an embodiment includes a fuel cell, a motor, a rotation shaft, a speed reducer, a measuring unit, and a control unit. The motor convert electrical power generated by the fuel cell into a rotative force. The speed reducer brake the rotation shaft that is rotating. The measuring unit measure a temperature of the fuel cell. The control unit is configured to determine whether to perform warming up for the fuel cell, based on the temperature. When the control unit determines to perform the warming up, the control unit causes the motor and the speed reducer to operate, and uses heat generated in the fuel cell and heat generated in the speed reducer to warm up the fuel cell.

Abstract: A carrier for developing an electrostatic latent image is provided. The carrier comprises a core particle having an internal void ratio of from 0.0% to 2.0% and a coating layer coating the core particle. The coating layer contains flat chargeable particles satisfying Formula 1 blow: 1.0?R1/R2?3.0??Formula 1 where R1 [nm] and R2 [nm] represent a major axis and a thickness, respectively, of each of the flat chargeable particles. The carrier has an apparent density of from 2.0 to 2.5 g/cm3.

Abstract: A carrier for forming an electrophotographic image is provided. The carrier comprises a core particle and a coating layer coating the core particle. The coating layer contains a conductive component comprising an element A, and a coating resin comprising an element B. The element A is undetected in the coating resin by an energy dispersive X-ray spectrometer, and the element B is undetected in the conductive component by the energy dispersive X-ray spectrometer. A standard deviation of a value A/B is 0.4 or less, where the value A/B is a ratio of the element A to the element B in intensity measured by the energy dispersive X-ray spectrometer.

Abstract: A machine tool includes a workpiece holder, a tool holder holding working tools that includes a hob cutter used in a rough machining and a skiving cutter used in a finish machining, a tool magazine, a tool replacing device replacing one of the working tools mounted on the tool holder with the other of working tools housed in the tool magazine, a rough machining controlling section performing the rough machining on the workpiece, a tool measuring device measuring a position of a blade in a rotation direction of the skiving cutter, an angle correcting section correcting a rotation angle of the skiving cutter based on a result measured by the tool measuring device, and placing a tooth space formed in the workpiece and an edge tip of the blade in a position corresponding to each other, and a finish machining controlling section by which workpiece is finish machined.

Abstract: A carrier for forming an electrophotographic image is provided. The carrier comprises a core particle and a coating layer coating the core particle. The coating layer contains chargeable particles and a dispersant. The carrier has an apparent density of from 2.0 g/cm3 or greater but less than 2.5 g/cm3.

Abstract: To provide a gear machining apparatus capable of correcting a tooth trace error without using a special tool when a hob cutter is cantilever-supported. A gear machining apparatus includes a hob cutter machining a tooth profile on a workpiece, a tool spindle device rotatably cantilever-supporting the hob cutter, a workpiece spindle device rotatably supporting the workpiece, a driving device moving the tool spindle device and the workpiece spindle device relatively to each other, a measuring device measuring the value corresponding to a bending amount of the hob cutter or a rotation synchronization shift of the workpiece spindle device with respect to the tool spindle device and a correction processing unit correcting a cutting amount of the hob cutter T or the rotation synchronization shift of the workpiece spindle device with respect to the tool spindle device based on the value measured by the measuring device.

Abstract: An electrophotographic developer is provided. The electrophotographic developer comprises a toner and a carrier. The toner contains alumina particles. The carrier comprises a core particle and a resin layer coating a surface of the core particle. The carrier has a volume average particle diameter (Dv) of from 45 to 70 ?m and a bulk density of from 2.1 to 2.5 g/cm3.

Abstract: A machine tool includes a workpiece holder, a tool holder holding working tools that includes a hob cutter used in a rough machining and a skiving cutter used in a finish machining, a tool magazine, a tool replacing device replacing one of the working tools mounted on the tool holder with the other of working tools housed in the tool magazine, a rough machining controlling section performing the rough machining on the workpiece, a tool measuring device measuring a position of a blade in a rotation direction of the skiving cutter, an angle correcting section correcting a rotation angle of the skiving cutter based on a result measured by the tool measuring device, and placing a tooth space formed in the workpiece and an edge tip of the blade in a position corresponding to each other, and a finish machining controlling section by which workpiece is finish machined.