Abstract: An unmanned aircraft includes: a sensor that includes at least a microphone that generates sound data; and a processor. The processor determines quality of a target sound using the sound data generated by the microphone, obtains a positional relationship between the unmanned aircraft and a sound source of the target sound using data generated by the sensor, and controls movement of the unmanned aircraft to control a distance between the unmanned aircraft and the sound source of the target sound, in accordance with the quality of the target sound and the positional relationship.

Abstract: Provided is a boiler for heating fluid by a heat generation unit including heat generation bodies in a container, the boiler being able to moderately heat fluid according to various situations while heat generated by the heat generation bodies can be efficiently utilized. A boiler for heating fluid by using heat generated by heat generation bodies includes the heat generation bodies and a container having the heat generation bodies inside and configured such that the inside of the container is filled with gas with higher specific heat than that of air. The boiler includes a controller configured to control a heat generation amount of the heat generation body under a situation where the gas has been supplied into the container.

Abstract: Provided is a boiler for heating fluid by a heat generation unit including heat generation bodies in a container, the boiler being able to moderately heat fluid according to various situations while heat generated by the heat generation bodies can be efficiently utilized. A boiler for heating fluid by using heat generated by heat generation bodies includes the heat generation bodies and a container having the heat generation bodies inside and configured such that the inside of the container is filled with gas with higher specific heat than that of air. The boiler includes a controller configured to control a heat generation amount of the heat generation body under a situation where the gas has been supplied into the container.

Abstract: In the process for reforming a biomass in accordance with the present invention, a mixture of a biomass and water as a raw material is compressed by a compressing pump 2 to be deposited into the inlet side of a circulating pump 43 in a primary reactor 41. The mixture is discharged from the circulating pump 43, conveyed to a heater 45, and then heated at a temperature ranging from 200 to 260° C., and sent to a reacting bath 47. In the reacting bath 47, hemicellulose contained in the biomass dissolves in hot water and subjected to a carbonizing reaction. The mixture derived from the primary reactor 41 is deposited in the inlet side of a circulating pump 44 of a secondary reactor 42, and sent to a heater 46, heated here at a temperature ranging from 270 to 330° C., and sent to the reacting bath 47. In the reacting bath 47, cellulose contained in the biomass dissolves in hot water, and is subjected to a carbonizing reaction.

Abstract: A flexible magnetic diskette used for magnetically storing various information which is recorded and read by a magnetic head. The diskette includes a flexible plastic disk sheet uniformly coated with magnetic material and having a mount hole at its center, and a holder for securing the disk sheet over the periphery of the mount hole. The holder is also made of a plastic material for holding the flexible disk sheet over the peripheral portion of the mount hole via a double-sided adhesive ring. A core member is made of a magnetic metal having a high abrasive resistance and rigidly attached to the holder over at least a part of a surface of the holder, with which a drive unit is engaged.