Abstract: Provided are a catalyst and a method that enable the production of an olefin-based polymer, which has a polar group and is usable for various applications, at high catalytic activity. A metal complex shown in general formula (C1) (in the formula, M represents a palladium atom or a nickel atom, X represents a phosphorus atom (P), R5-R9 are as set forth in the claims, L represents an electron donating ligand, and q is 0, ½, 1, or 2) is used as a catalyst for polymerization of an olefin having a polar group.

Abstract: A motor control device includes a control unit and a generation-method changer. The control unit generates a driving signal for driving a motor in accordance with a command signal and an encoder signal and outputs the generated driving signal to the motor, the command signal being a signal for setting the position of a moving part connected to the motor to a target position, the encoder signal indicating the position of the motor detected by an encoder. The generation-method changer changes a method used by the control unit to generate the driving signal in accordance with a position sensor signal indicating a detected target position that is the target position detected by a position sensor mounted on the moving part.

Abstract: An electric motor control device comprises: an abnormal torque estimation unit for estimating abnormality of torque of an electric motor from target electric-current values determined by an electric-current instruction calculation unit, detected electric-current values obtained by a detected phase-current calculation unit, and an electrical angle calculated by an electrical angle calculation unit; and a cutoff management unit for halting a drive operation of the motor if its output torque is abnormal.

Abstract: A motor control device according to the present disclosure includes: a motor drive circuit that outputs a drive current to a motor; a drive current detector; a main control unit, and an auxiliary control unit, wherein the main control unit has a first control signal generator that generates a first control signal based on a detected current signal; a first drive signal generator that generates a drive signal based on the first control signal, and a first switcher that switches to an output state of the motor drive circuit of the drive signal, and the auxiliary control unit has a second control signal generator that generates a second control signal; a second drive signal generator that generates the drive signal based on the second control signal, and a second switcher that switches to an output state of the motor drive circuit of the drive signal.

Abstract: A method may include setting, on the basis of an input by a player, a type of character among various types of characters as the character linked to the player. The method further includes commanding a display unit to display a progress indicator corresponding to the progress of a game. The method further includes accepting an input, by a player, corresponding to the progress indicator. The method further includes commanding a sound output unit to output narration voice that corresponds to the character set as linked to the player and that is related to the progress of the game.

Abstract: A lawn mower according to the present invention includes: a drive source provided with a rotation shaft; a cutter blade extending in a direction intersecting the rotation shaft; and a housing provided with a peripheral wall surrounding the cutter blade. The cutter blade is provided with a cutting portion, the cutting portion being provided at least at a portion of the cutter blade that faces the peripheral wall, and the peripheral wall is provided with protrusions protruding toward the rotation shaft from a surface of the peripheral wall that faces the direction of the rotation shaft.

Abstract: A cutter blade of a lawn mower includes an attachment portion, a first arm portion, and a second arm portion. The first arm portion includes a first blade portion. The second arm portion includes a second blade portion. In a horizontal placement state in which the cutter blade is placed in a manner so that a rotation center line of the cutter blade extends along a vertical direction, a position of a first portion of the first blade portion in the vertical direction and a position of a second portion of the second blade portion in the vertical direction are different from each other. A distance from the rotation center line to the first portion and a distance from the rotation center line to the second portion are equal to each other.

Abstract: A cutter blade of a lawn mower is rotated by a rotary shaft provided in a lawn mower. The cutter blade includes an attachment portion attached to the rotary shaft, and a first arm portion and a second arm portion each extending from the attachment portion in a radially outward direction. A wing portion is provided only on the first arm portion among the first arm portion and the second arm portion, the wing portion being inclined upward, toward a reverse rotation direction opposite to a blade rotation direction which is a rotation direction of the cutter blade.

Abstract: A light-driven fuel cell includes a cathode, an anode, and a proton-permeable membrane between the anode and the cathode. The anode includes a photocatalyst for anaerobic methane oxidation reaction, and when the anode is supplied with methane and water and is irradiated with light, methanol, protons and electrons are generated by anaerobic methane oxidation reaction from the methane and the water supplied to the anode; the protons pass through the proton-permeable membrane and move to the cathode; and the electrons move to the cathode via an external circuit. The cathode includes a photocatalyst for aerobic methane oxidation reaction, and when the cathode is supplied with methane and oxygen and is irradiated with light, methanol and water are generated by aerobic methane oxidation reaction from the methane and the oxygen supplied to the cathode and the protons and the electrons moved from the anode.