Abstract: A first controller includes a start control section and a passage determination section. After activating a second starter to start cranking, the start control section stops the operation of the second starter and starts the motor operation of the first starter at a predetermined timing. The passage determination section determines whether a predetermined passage conditional expression holds after cranking is started by the second starter. The start control section stops the operation of the second starter and starts the motor operation of the first starter if the passage conditional expression holds before the engine passes the first compression top dead center, regardless of whether the engine has passed the first compression top dead center.

Abstract: Provided is a communication device including: a response request determination unit that determines whether a response request is included, from content of a transmission frame; a transmission unit that carries out processing to transmit a frame; a timer that starts to measure a time period after transmission processing is completed; a reception state determination unit that determines whether a response frame is being received when a first time period is measured; a communication processing deciding unit that decides that the time period to be measured by the timer is to be extended by a second time period in when it has been determined that the response frame is being received, and decides that predetermined processing is to be carried out when it has been determined that the response frame is not being received; and a response reception check unit that checks whether the response frame is being received correctly.

Abstract: A gear drive device includes a first gear, and a second gear that meshes with the first gear to allow torque transmission. At least one of the first gear and the second gear includes a fan-type gear. The first gear and the second gear each include a guide portion, and the guide portion is configured to position the first gear and the second gear in a gear rotation direction upon installation thereof.

Abstract: In a wireless communication system managing wireless communication channels, a wireless communication device includes a radio unit communicable by switching to select any one of wireless communication channels, a channel list storage storing therein a list of the channels, a channel transmission controller controlling the radio unit to transmit a packet while switching a channel on the basis of the list, a channel search transmission controller controlling the radio unit to transmit the packet while switching the channel on the basis of the list until the packet is successfully transmitted, and a transmission control selector selecting either the channel transmission controller or the channel search transmission controller on the basis of a content of the packet of a transmission target for transmission control.

Abstract: A gear drive device includes a first gear, a second gear that meshes with the first gear to allow torque transmission, and a biasing member that applies rotational torque in one direction to the first gear or the second gear. The first gear and the second gear are brought into contact at a contacting tooth surface thereof by the biasing member. At least one of the first gear and the second gear includes a non-contacting tooth surface that is on an opposite side of the contacting tooth surface and partially removed.

Abstract: A gear drive device includes a first gear, and a second gear that meshes with the first gear to allow torque transmission. At least one of the first gear and the second gear includes a fan-type gear. The first gear and the second gear each include a guide portion, and the guide portion is configured to position the first gear and the second gear in a gear rotation direction upon installation thereof.

Abstract: An operation device includes a main body, a lifting and lowering mechanism unit movably supported with respect to the main body and including a driven portion configured to receive driving force for movement of the lifting and lowering mechanism unit, a driving unit attached to the main body and configured to drive the lifting and lowering mechanism unit by a driving pin provided on a rotation gear. The lifting and lowering mechanism unit includes a groove portion into which the driving pin is accommodated by rotation of the rotation gear when the driving unit is mounted on the main body.

Abstract: There is provided a wireless transmission device in which a lower layer processing unit inserts first random delay before frame transmission in response to a frame transmission request made by an upper layer processing unit, the wireless transmission device including a frame transmitting unit configured to transmit a frame when the frame transmission request is made by the upper layer processing unit, and a frame group transmitting unit configured to transmit a frame group including one or two or more types of frame in accordance with a listening state of a facing wireless reception device when the frame transmission request is made by the upper layer processing unit.

Abstract: An insulator includes a plurality of electrical conductors and a main body. One ends of the plurality of electrical conductors are electrically connected to a ground terminal or a plurality of input terminals of a motor. The main body includes an insulating material. Other ends of the plurality of electrical conductors are disposed adjacent to each other on the main body in a direction intersecting with a direction of an output shaft of the motor.

Abstract: Provided is a communication device including: a response request determination unit that determines whether a response request is included, from content of a transmission frame; a transmission unit that carries out processing to transmit a frame; a timer that starts to measure a time period after transmission processing is completed; a reception state determination unit that determines whether a response frame is being received when a first time period is measured; a communication processing deciding unit that decides that the time period to be measured by the timer is to be extended by a second time period in when it has been determined that the response frame is being received, and decides that predetermined processing is to be carried out when it has been determined that the response frame is not being received; and a response reception check unit that checks whether the response frame is being received correctly.

Abstract: An object of the present invention is to provide an aluminium grain material having significantly high purity, and a method for producing the same. Disclosed is an aluminium grain material having an average mass per grain of 0.01 to 10 g, wherein the total content of twelve elements of silicon (Si), iron (Fe), copper (Cu), magnesium (Mg), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), nickel (Ni), zinc (Zn), gallium (Ga), and zirconium (Zr) in the aluminium grain material, measured by glow discharge mass spectrometry, is 5 ppm by mass or less.

Abstract: A packet relay system in which each node calculates a link cost of each adjacent node based on an arrival rate of a packet from each adjacent node, acquires an accumulated value of a link cost calculated by each node in a range of nodes from a sink node for each adjacent node, calculates, for each adjacent node, a path cost of the one adjacent node by adding the link cost calculated to the accumulated value, and relays a data packet to one adjacent node selected from among nodes adjacent to the node based on a path cost of each adjacent node. This enables establishment of an upstream path to a sink node without increasing the amount of communication in a network.

Abstract: The communication apparatus intermittently carries out receiving operation during a predetermined reception period. The apparatus includes a wireless communication section for carrying out wireless communication, which includes a carrier sensor for sensing a carrier at the beginning of the communication, and a carrier sense switching section for using carrier sense levels different between packet transmission and reception to switch the carrier sense level of the carrier sensor according to the packet. Thus, the apparatus can use and flexibly adjust the optimum carrier sense level for the intermittent receiving operation within the reception period.

Abstract: There is provided a wireless transmission device in which a lower layer processing unit inserts first random delay before frame transmission in response to a frame transmission request made by an upper layer processing unit, the wireless transmission device including a frame transmitting unit configured to transmit a frame when the frame transmission request is made by the upper layer processing unit, and a frame group transmitting unit configured to transmit a frame group including one or two or more types of frame in accordance with a listening state of a facing wireless reception device when the frame transmission request is made by the upper layer processing unit.

Abstract: In a communications apparatus, a communication controller transmits and receives signals on any of plural channels. A channel switching controller is responsive to channel switching information selectively defining plural reception-waiting periods using the channels to alter a channel to be used by the communication controller. A neighboring node channel controller exchanges channel switching information with other nodes to manage the channel switching information received from the other nodes. When transmitting transmission signals, a transmission controller refers to the channel switching information of the other nodes, and controls repetitive transmission of the transmission signals on the channel thus searched for.

Abstract: In a wireless communication system managing wireless communication channels, a wireless communication device includes a radio unit communicable by switching to select any one of wireless communication channels, a channel list storage storing therein a list of the channels, a channel transmission controller controlling the radio unit to transmit a packet while switching a channel on the basis of the list, a channel search transmission controller controlling the radio unit to transmit the packet while switching the channel on the basis of the list until the packet is successfully transmitted, and a transmission control selector selecting either the channel transmission controller or the channel search transmission controller on the basis of a content of the packet of a transmission target for transmission control.

Abstract: An information communication apparatus may include a request buffer, a request sorting device, a sending device, a frame generating device, and a frame transmitting device. A request buffer may store transmission requests corresponding to frames. A request sorting device may sort the transmission requests. A sending device may send the sorted transmission requests in accordance with a transmission timing that is determined based on destinations of the frames and in which a receiving node can receive the frames. A frame generating device may generate frames based on the received transmission requests. A frame transmitting device configured to transmit the generated frames.

Abstract: A wireless communication apparatus having a plurality of neighboring wireless communication apparatuses may includes a wireless transmitter, an information control storage member, and a transmitting power calculator. A wireless transmitter may transmit a wireless signal with a transmitting power to a destination wireless communication apparatus. An information control storage member may maintain first information of links between the wireless communication apparatus and the plurality of neighboring wireless communication apparatuses, and second information of a communication route between the wireless communication apparatus and the destination wireless communication apparatus. A transmitting power calculator may calculate the transmitting power based on the first and second information, so as to ensure reception of the wireless signal.

Abstract: A tree topology in a multi-hop wireless network is configured by having each node other than the root node select a parent node within direct communication range, thereby becoming a child node of the selected parent node. Neighboring nodes provide selection values such as routing costs and local structural information indicating the existing topology in their vicinities, including parent-child relationships. The selection of the parent node is based on the received selection values, but the local structural information is used to bias the selection in favor of neighboring nodes with at least one other child node. This selection strategy reduces the number of parent nodes in the network and enables more nodes to operate as end nodes, which can then conserve power by carrying out sleep control.

Abstract: A wireless communication system includes a first node, multiple second nodes, and multiple third nodes that communicate with the first node through the second nodes. The second and third nodes transmit control information to their neighboring third nodes, which calculate link costs from the reception status of the control information. The control information transmitted by each node includes a path cost indicating the cost of a path between the transmitting node and the first node. From the path costs in received control information, each third node selects a second node through which to communicate with the first node, and selects a parent node as the destination of the first hop on the path through the selected second node to the first node. Routing is thereby accomplished autonomously without having the second nodes flood the system with routing requests.