Abstract: A terminal control system causes a wireless terminal to perform a switching process of switching a connection destination of the wireless terminal in accordance with the wireless terminal being located at such a position as to be capable of establishing connection both with a wireless base station and with a free-space optical communication apparatus, acquires weather information regarding an area in which the wireless terminal is located, and causes, in accordance with the weather information, the wireless terminal to stop the switching process of switching the connection destination of the wireless terminal from the wireless base station to the free-space optical communication apparatus.

Abstract: A free-space optical communication control system includes at least one processor. The at least one processor carries out: a first detection process of detecting a change in a connection relationship between a first free-space optical communication apparatus and a second free-space optical communication apparatus adjacent to the first free-space optical communication apparatus; a second detection process of detecting a transition of work stages in accordance with the change in the connection relationship detected and plan information indicating a connection relationship between the first free-space optical communication apparatus and the second free-space optical communication apparatus in each of the work stages; and a connection control process of controlling, according to the transition of the work stages detected, which connection destination is connected to the first free-space optical communication apparatus.

Abstract: A free-space optical communication control system includes at least one processor. The at least one processor carries out: an interruption estimation process of estimating an interruption of free-space optical communication over a free-space optical communication network in accordance with movement route information that indicates a movement route of a mobile object movable within a communication area of the free-space optical communication network; and a path change process of changing a free-space optical communication path in accordance with an estimation result of the interruption estimation process.

Abstract: A management system for managing an upper free-space optical communication apparatus and a lower free-space optical communication apparatus that carry out free-space optical communication in an up-and-down direction is provided, the management system including at least one processor, the at least one processor carrying out: an acquisition process of acquiring a first index that indicates a quality of a first upward light signal received by the upper free-space optical communication apparatus; and a determination process of determining a possibility of contamination of a light sending and receiving window of the lower free-space optical communication apparatus in accordance with the first index, the lower free-space optical communication apparatus being configured to send and receive a light signal of the free-space optical communication through the light sending and receiving window.

Abstract: A free space optical communication device includes: a plurality of light transmitting/receiving sections; and at least one processor configured to execute: a communication control process of controlling communication which is to be carried out via the plurality of light transmitting/receiving sections, in the communication control process, the at least one processor (a) determining a required communication capacity for the communication and (b) controlling, on the basis of the required communication capacity, the number of light transmitting/receiving sections to be used for the communication.

Abstract: A free space optical communication device includes: a plurality of light transmitting/receiving sections; and at least one processor configured to execute: a communication control process of controlling communication which is to be carried out via the plurality of light transmitting/receiving sections, in the communication control process, the at least one processor causing two or more light transmitting/receiving sections of the plurality of light transmitting/receiving sections to transmit same pieces of information in parallel according to respective different communication schemes.

Abstract: A communication control system includes at least one processor executing: a main communication process of carrying out communication with one or more targets through an optical fiber line; a specifying process of specifying, from among the one or more targets, a free-space optical communication target based on communication statuses in the main communication process; a sub communication process of carrying out communication with the free-space optical communication target via a free-space optical communication apparatus(es); and a selecting process of selecting, according to at least one of (i) a capacity of the communication with the free-space optical communication target in the main communication process, (ii) the communication statuses of the free-space optical communication apparatuses, and (iii) processing capacities of the free-space optical communication apparatuses, a path for free-space optical communication with the free-space optical communication target in the sub communication process.

Abstract: Provided are a heat sink capable of suppressing overcooling of an electronic component which should not be overcooled and highly efficiently cooling only an electronic component which should be cooled, and a circuit device including the same. A heat sink includes a pipe and a cooling block. At least one projection is formed in the cooling block. The pipe is in contact with the projection. The pipe is arranged with a spacing from a portion of the cooling block other than the projection.

Abstract: Provided are a heat sink capable of suppressing overcooling of an electronic component which should not be overcooled and highly efficiently cooling only an electronic component which should be cooled, and a circuit device including the same. A heat sink includes a pipe and a cooling block. At least one projection is formed in the cooling block. The pipe is in contact with the projection. The pipe is arranged with a spacing from a portion of the cooling block other than the projection.

Abstract: A voltage/current verifier computes, for each phase, a phase difference between phase voltage and phase current from the phase of phase voltage and the phase of phase current computed for each phase by a phase acquirer, and determines conformity if all of the computed phase differences are within a preset range. A current/current verifier computes phase differences between phase currents from the phase of phase current computed for each phase by the phase acquirer, and determines conformity if all of the computed phase differences are less than 180°. A reporting device reports that a current transformer is incorrectly placed on a power line unless both the voltage/current verifier and the current/current verifier do not determine conformity.

Abstract: A voltage/current verifier computes, for each phase, a phase difference between phase voltage and phase current from the phase of phase voltage and the phase of phase current computed for each phase by a phase acquirer, and determines conformity if all of the computed phase differences are within a preset range. A current/current verifier computes phase differences between phase currents from the phase of phase current computed for each phase by the phase acquirer, and determines conformity if all of the computed phase differences are less than 180°. A reporting device reports that a current transformer is incorrectly placed on a power line unless both the voltage/current verifier and the current/current verifier do not determine conformity.

Abstract: A three-phase AC to DC converter includes a three-phase AC power supply, a three-phase rectifier bridge circuit that is connected to the three-phase AC power supply and includes rectifying devices which are connected in a bridge configuration, a three-phase full-bridge circuit that includes two serially-connected switching devices for each of three phases, the two serially-connected switching devices being connected at an output side of the three-phase rectifier bridge circuit, and includes reverse blocking diodes which are connected in parallel to the respective switching devices, a reactor that connects the three-phase full-bridge circuit to the three-phase AC power supply, a smoothing capacitor connected to an output side of the three-phase full-bridge circuit, DC voltage detection means that detects an output voltage, power supply phase detection means that detects a power supply phase of the three-phase AC power supply, and pulse width modulator that outputs PWM signals which control the switching device

Abstract: A power measuring device stores in a set phase relation storage whether the load connected to a three-phase, four-wire power source is inductive, capacitive, or neither of them, in other words whether the phase currents are ahead, delayed, or matching phases with respect to the phase voltages, and determines whether the stored phase relation coincides with the determined phase relation. Then, the incorrect connection that cannot be verified in the prior art, more specifically the primary conductors of the current transformers of the current xfrms that are all arranged reversely while the voltage terminals are connected correctly, can be detected as an incorrect arrangement.

Abstract: A three-phase AC to DC converter includes a three-phase AC power supply, a three-phase rectifier bridge circuit that is connected to the three-phase AC power supply and includes rectifying devices which are connected in a bridge configuration, a three-phase full-bridge circuit that includes two serially-connected switching devices for each of three phases, the two serially-connected switching devices being connected at an output side of the three-phase rectifier bridge circuit, and includes reverse blocking diodes which are connected in parallel to the respective switching devices, a reactor that connects the three-phase full-bridge circuit to the three-phase AC power supply, a smoothing capacitor connected to an output side of the three-phase full-bridge circuit, DC voltage detection means that detects an output voltage, power supply phase detection means that detects a power supply phase of the three-phase AC power supply, and pulse width modulator that outputs PWM signals which control the switching device

Abstract: High-resolution powder diffraction is performed using high-energy synchrotron radiation as an x-ray source in such a way that a detector mounted on a measuring instrument such as a diffractometer is moved by smaller distances than the distance between adjacent x-ray detection units (pixels) in order to measure data for interpolation between pixels and the obtained interpolating data are put together to thereby improve the spatial resolution in measurement that has been limited by the detection unit in the detector.

Abstract: High-resolution powder diffraction is performed using high-energy synchrotron radiation as an x-ray source in such a way that a detector mounted on a measuring instrument such as a diffractometer is moved by smaller distances than the distance between adjacent x-ray detection units (pixels) in order to measure data for interpolation between pixels and the obtained interpolating data are put together to thereby improve the spatial resolution in measurement that has been limited by the detection unit in the detector.