Abstract: An invisible light communication system can communicate using infrared or ultraviolet light signals to provide more secure communications. The system includes a software definable and hardware configurable transmitter that uses an input, an encoder, an invisible light source, and an optic to transmit an invisible light signal. The system also includes a software definable and hardware configurable receiver that receives the invisible light signal using an optic, a detector, a detector, and an output. Applications for the invisible light communication system include fixed, deployable, vehicle, and wearable configurations for voice, video and data transmission and receipt in support of a variety of use cases: remote sensing; data exfiltration; remote control, ordnance detonation; tactical chat/messaging; point-to-point and point-to-multipoint audio communications; and full motion video.

Abstract: An automatic line integrity monitoring system may include a cable having a plurality of wires, and a controller configured to sequentially swap each wire of the cable from a main power supply to an auxiliary power supply. The controller further checks each wire for a current flow while the wire is connected to the auxiliary power supply, and, in response to the current flow satisfying a criterion, automatically disconnect the cable from the main power supply. The criterion may, for example, be an amperage threshold.

Abstract: The boiling-water geothermal heat exchanger 1 is provided with a water injection pipe 2 which is installed underground and to which water is supplied from the ground and a steam extraction pipe 3 which is installed underground so as to be in contact with the water injection pipe 2 and has a plurality of ejection ports 5, in which a pressure inside the steam extraction pipe 3 is reduced to the vicinity of a pressure required by a turbine 6, high-pressure hot water which is produced by supplying heat from a geothermal region 4 to water inside the water injection pipe 2 is changed to a single-phase flow of steam inside the steam extraction pipe 3 present underground via the ejection ports 5, and the single-phase flow of steam is extracted on the ground.

Abstract: A geothermal heat exchanger 1 includes a water injection pipe 2 that is installed underground and to which water is supplied from above ground and a steam extraction pipe 3 that is installed underground so as to be contiguous to the water injection pipe 2. The steam extraction pipe 3 has a plurality of gushing ports 5 at its lower part, and pressure in the steam extraction pipe 3 is decreased approximately to pressure required by a turbine 6. The steam extraction pipe 3 is formed such that the diameter of the steam extraction pipe 3 becomes smaller from the lower side of the geothermal region toward the upper side of a ground surface G. Water supplied to the water injection pipe 2 becomes high-temperature pressurized water by heat supplied from the geothermal region 4, and gushes from the gushing ports 5 into the steam extraction pipe 3 in an atomized state, and is then converted into a steam single-phase flow, and allows a power generator 7 to conduct power generation.

Abstract: The boiling-water geothermal heat exchanger 1 is provided with a water injection pipe 2 which is installed underground and to which water is supplied from the ground and a steam extraction pipe 3 which is installed underground so as to be in contact with the water injection pipe 2 and has a plurality of ejection ports 5, in which a pressure inside the steam extraction pipe 3 is reduced to the vicinity of a pressure required by a turbine 6, high-pressure hot water which is produced by supplying heat from a geothermal region 4 to water inside the water injection pipe 2 is changed to a single-phase flow of steam inside the steam extraction pipe 3 present underground via the ejection ports 5, and the single-phase flow of steam is extracted on the ground.