Abstract: A watercraft positional information managing system in which GPS-based positional information is prevented from being falsified includes a server and a watercraft. The watercraft includes a propulsion device and a communicator to communicate with the server. The communicator includes a position detector to detect positional information of the watercraft. The propulsion device includes an engine and a controller configured or programmed to control the engine. The controller is connected to the communicator and outputs data related to the engine to the communicator. The communicator transmits the data related to the engine and the positional information of the watercraft to the server. The server receives the data related to the engine and the positional information of the watercraft and determines whether or not the positional information of the watercraft is genuine based on the data related to the engine.

Abstract: A marine propulsion device information transmitting and receiving system includes a watercraft and a server. The watercraft includes an engine and a controller to control the engine. The controller encrypts an operating time of the engine and data related to the engine with an encryption key associated with information unique to the engine. The watercraft includes a communicator to transmit the information unique to the engine, the encrypted operating time of the engine, and the encrypted data related to the engine to the server. The server decrypts the encrypted operating time of the engine and the encrypted data related to the engine with the encryption key associated with the information unique to the engine, and determines whether or not the decrypted data related to the engine are genuine based on the decrypted operating time of the engine.

Abstract: A control device of a marine propulsion device, which has an engine and a propeller and is mounted on a hull. The control device includes a processor, and a non-transitory storage medium having program instructions stored thereon. The execution of the program instructions by the processor causes the control device to acquire a rotation speed of the engine or a rotation speed of the propeller, acquire a torque of the engine, acquire a speed of the hull, and determine whether a ventilation of the engine has occurred based on at least two among the acquired rotation speed, the acquired engine torque, and the acquired hull speed.

Abstract: An X-ray imaging apparatus is provided with an X-ray source, a detector, a C-shaped arm, a hose for accommodating wiring, the hose including a base side portion and an opposite side portion, a base including a C-shaped arm support portion and a hose attachment portion to which the base side portion is rotatably attached, a biasing member for biasing the base side portion of the hose to rotate about the hose attachment portion in the first rotation direction outwardly away from the C-shaped arm, and an image processing unit.

Abstract: A marine vessel rental system that permits/prohibits starting of a driving source of a marine vessel in response to time and a marine vessel location includes a generator to generate an electronic key associated with information about a marine vessel for rent and information about a rental period in response to a request from a user terminal, and to transmit the information to the user terminal, a controller configured or programmed to permit starting of the driving source based on a condition that a current time belongs to the rental period corresponding to the electronic key, and an obtainer configured or programmed to obtain location information of the marine vessel. When the rental period corresponding to the electronic key has ended and the location information indicates that the marine vessel is located within a predetermined area, the controller is configured or programmed to prohibit the start of the driving source.

Abstract: A light reflecting member has a mirror face adapted to reflect incident light. A first arm member and a second arm member are bonded to the light reflecting member. A first actuator and a second actuator are configured to cause the first arm member and the second arm member respectively to displace in a direction intersecting the mirror face to change an angle of the mirror face relative to the incident light. A thermal expansion coefficient of a material forming the light reflecting member is smaller than a thermal expansion coefficient of a material forming each of the first arm member and the second arm member.

Abstract: A usage management system includes a use rights management server and a user terminal. A controller of a vessel propulsion apparatus operates a prime mover in a permission mode to permit an output exceeding a predetermined limit output if use permission is provided from the user terminal, and operates the prime mover in a non-permission mode to prohibit an output exceeding the predetermined limit output if use permission is not provided from the user terminal. The user terminal enters an active state to allow issuance of use permission if a use-permission notification is received from the use rights management server, and enters a non-active state to prohibit issuance of use permission if a use-permission notification is not received from the use rights management server. The use rights management server transmits a use-permission notification or a use-non-permission notification in accordance with use rights information concerning the vessel propulsion apparatus.

Abstract: At least a portion of a setting pattern of functions relating to a boat is automatically changed in response to execution of activation operations different from one another. The boat includes a controller configured or programmed to activate the boat by each of a plurality of different activation operations. When an activation operation of the activation operations satisfying a first condition is executed, the controller sets functions relating to the boat with the first setting pattern. When an activation operation not satisfying the first condition is executed, the controller sets functions relating to the boat with a second setting pattern having setting contents at least partially different from the first setting pattern.

Abstract: A control system for a watercraft includes a device system, a communication device, a controller, a first battery, and an electric power receiver. The communication device performs wireless communication with a server. The first battery provides electric power to the communication device. The electric power receiver is installed in the watercraft, connected to the first battery, and operable to receive shore power. The controller is configured or programmed to send device data to the server in a normal electric power mode when the first battery is connected to the shore power. The controller is configured or programmed to send the device data to the server in a low electric power mode when a low electric power condition, including a condition that the first battery is not connected to the shore power, is satisfied. The controller is configured or programmed to reduce data traffic of the device data to be sent to the server in the low electric power mode compared to when in the normal electric power mode.

Abstract: A system for a watercraft includes an engine sensor, a status sensor, and a watercraft operating controller. The engine sensor is operable to detect a rotational speed of the engine. The status sensor is operable to detect status data indicating a status of the watercraft. The watercraft operating controller is configured or programmed to determine whether or not an actual operation of the marine propulsion device has been started after shipment of the marine propulsion device, obtain the status data when the rotational speed of the engine reaches a first rotational speed range for the first time after a start of the actual operation of the marine propulsion device, and record the status data when the rotational speed of the engine reaches the first rotational speed range for the first time after the start of the actual operation of the marine propulsion device as initial status data in the first rotational speed range.

Abstract: A high-pressure pump has a metering valve and a valve stopper. The stopper has a regulation portion which an end surface of the valve is brought into contact with. An outer diameter of the regulation portion is equal to an outer diameter of the outer peripheral surface of the valve. A cylindrical sleeve is disposed around the regulation portion. When the end surface of the valve is in contact with the regulation portion, the sleeve covers a tapered surface of the valve.

Abstract: A system to control a watercraft including an engine includes a first temperature sensor and a controller. The first temperature sensor is operable to detect a temperature of the engine. The controller is configured or programmed to obtain the temperature of the engine either upon an activation of the controller or a start of the engine. The controller is configured or programmed to estimate an environmental temperature of the watercraft based on the temperature of the engine obtained either upon the activation of the controller or the start of the engine.

Abstract: A fuel management system to improve accuracy of calibration data to convert an output value of a fuel gauge into a remaining amount of fuel in a fuel tank includes a fuel tank mounted on a hull of a marine vessel, a fuel gauge to measure a liquid level position of fuel in the fuel tank, and a controller configured or programmed so that in a range where an output value of the fuel gauge changes, measurement reference points are set based on the output value of the fuel gauge. When supplying fuel to the fuel tank, the controller is configured or programmed to obtain calibration data showing a relationship between the output value of the fuel gauge and a remaining amount of the fuel in the fuel tank by comparing an amount of fuel supplied to the fuel tank at each of the measurement reference points and the output value of the fuel gauge at each of the measurement reference points.

Abstract: A posture control system for a hull, and a marine vessel including the posture control system, allows crew members to fish more comfortably and includes a posture control tab attached to a stern of the hull to control a posture of the hull, a driver to drive the posture control tab, and a controller to control the driver. When it is determined that the hull has changed to a fishing mode, the controller causes the driver to raise the posture control tab to a predetermined position.

Abstract: A protector includes a shell portion that is formed from a resin and covers an outer side of an electric wire and a protection portion that dampens an impact applied from outside the protector. The protection portion is formed from a resin and formed integrally with the shell portion.

Abstract: A method improves an execution speed of a host multi-core simulator simulating a target multi-core processor that has a hierarchical architecture including multiple corelets per core that, in turn include multiple functional units. The host multi-core simulator is implemented using multiple OS threads. The method selects layers in the hierarchical architecture to simulate on one of the OS threads, based on a shortest estimated layer execution time determined by (1.0+t/c*s)/min(c, t), wherein c is a number of cores in the simulator, t is a number of OS threads, and s is a threading overhead coefficient. The method respectively executes, from among the selected layers, a parallel simulation of the units therein that frequently communicate with each other on one of the multiple OS threads based on a communication frequency threshold, by assigning and using a respective user-level thread for each of the units from among a plurality of user-level threads.

Abstract: A method is provided for identifying a data transfer mismatch between a sender and a receiver from among units of a software simulator of a hardware processor. The simulator runs the plurality of the units which communicate with each other via First-In First-Outs (FIFOs). The method counts amounts of data the sender writes to the FIFOs and the receiver reads from the FIFOs for a given data transfer. The method avoids blocking during FIFO reading and writing operations by (i) reading dummy data by the receiver, even if the FIFOs are empty, when the receiver tries reading from the FIFOs, and (ii) discarding written data if the FIFOs are full, when the sender tries writing to the FIFOs. The method identifies mismatches in the amount of data the sender writes to the FIFOs versus the amount of data the receiver reads from the FIFOs for the given data transfer.

Abstract: The present invention provides a binder for positive electrode of lithium ion battery which is excellent in workability at the time of producing a positive electrode, is excellent in charge and discharge characteristics such as cycle characteristics and rate characteristics, and enables to possible to produce a positive electrode having an extended cycle life, as well as the present invention provides a slurry for forming positive electrode mixture layer of lithium ion battery, a positive electrode for lithium ion battery, and a lithium ion battery, using the same.

Abstract: A computer-implemented method, a computer program product, and a computer system for multi-sample dropout in deep neural network training. A computer creates multiple dropout samples in a minibatch, starting from a dropout layer and ending at a loss function layer in a deep neural network. At the dropout layer in the deep neural network, the computer applies multiple random masks for respective ones of the multiple dropout samples. At a fully connected layer in the deep neural network, the computer applies a shared parameter for all of the multiple dropout samples. After the loss function layer in the deep neural network, the computer calculates a final loss value, by averaging loss values of the respective ones of the multiple dropout samples.

Abstract: A seal ring is in contact with an outer peripheral surface of a plunger. A biasing ring is made of a material having a lower fuel resistance than the seal ring, and is provided radially outwardly with respect to the seal ring in a seal chamber so as to bias the seal ring against the plunger. An axial position of a portion of the seal ring where a surface pressure on the plunger is maximum is defined as a maximum surface pressure position. The seal ring has diameter changing portions in both axial directions with respect to the maximum surface pressure position. The diameter changing portions are formed so as to have an outer diameter smaller than that of the portion corresponding to the maximum surface pressure position.