Abstract: Provided are a rolling observation technique whereby the state of rolling on a rolling interface between a material to be processed and a roll can be observed easily and on site; a rolling state observation apparatus for observing the state of rolling at the rolling interface between a material to be processed and a roll during rolling of the material to be processed using two rolls, wherein the two rolls are constituted from a stationary fixed roll and a moving roll that rotates on its own axis while revolving around the fixed roll, and a device for observing the rolling state is provided to the fixed roll; and a rolling state observation apparatus comprising a revolution means for causing the moving roll to revolve around the fixed roll with the center axis of the fixed roll as the rotation center, and a rotation means for causing the moving roll to rotate on its own axis, the rolling state observation apparatus being configured so that the moving roll rotates on its own axis due to the revolution of the mo

Abstract: An electronic device includes multiple light transmissive panels, a plurality of light emitters, and a partition plate. The multiple light transmissive panels are provided so that light emitting surfaces of the panels are not parallel to each other. The plurality of light emitters includes a first light emitter and a second light emitter. The first light emitter and the second light emitter are provided corresponding to one of the panels and each radiate light to out of the electronic device through the one of the panels. The partition plate is erected between the first light emitter and the second light emitter so that the partition plate prevents the light of the first light emitter from being incident on a position on the one of the panels where the light of the second light emitter is incident.

Abstract: An object of the present invention is to enable a storage location for data, such as a file, to be specified by a simple operation using an identifier such as a two-dimensional code. A data storage device of the present invention is provided with a selecting section which selects arbitrary data, a reading section which reads an identifier, a recognizing section which recognizes a storage destination for the data from a result of reading by the reading section, and a storing section which stores the data in the storage destination recognized by the recognizing section.

Abstract: An object of the present invention is to enable a storage location for data, such as a file, to be specified by a simple operation using an identifier such as a two-dimensional code. A data storage device of the present invention is provided with a selecting section which selects arbitrary data, a reading section which reads an identifier, a recognizing section which recognizes a storage destination for the data from a result of reading by the reading section, and a storing section which stores the data in the storage destination recognized by the recognizing section.