Abstract: A culture device is provided with a culture tank having sidewalls that are formed from a translucent material, and cultures fine algae in a culture liquid that is accommodated in the culture tank and through which light is emitted via the sidewalls. The culture device is provided with a translucent insulating part that covers the sidewalls. The insulating part forms an air layer that insulates the inside of the culture tank. A culture device is provided with a culture tank having sidewalls that are formed from a translucent material, and cultures fine algae in a culture liquid that is accommodated in the culture tank and through which light is emitted via the sidewalls. The culture device is provided with a translucent insulating part that covers the sidewalls. The insulating part forms an air layer that insulates the inside of the culture tank.

Abstract: An image forming device includes a document table for placing a document whose image is to be acquired and an image acquiring unit fixed at a position above the document table for acquiring an image of the document from above. The image forming device further includes a display unit for displaying the acquired image data, an image forming unit for forming an image of the acquired image data on an image forming medium, and a control unit. The control unit controls the image acquiring unit to acquire image data of the document, processes the acquired image data to cause the display unit to display the same, and processes the acquired image data to cause the image forming unit to perform an image forming operation.

Abstract: In a magnetic recording and reproducing apparatus which digitally records and reproduces audio and video data, at a reproduction in a reverse direction, address generator 3 for audio deshuffling outputs addresses for deshuffling in a reverse order to an order of a reproduction in a normal direction. Audio deshuffling circuit 2 outputs audio data following the addresses supplied from address generator 3.

Abstract: A frost deposition detector for an air cooler disposed in a refrigerating chamber. A first signal is generated when the electric current flowing through the motor of the air blower for the air cooler, the value of which is adjusted with respect to the voltage variation across the motor and the air temperature change in the refrigerating chamber, reaches a threshold value which is proportional to the initial current value corresponding to the state of no frost deposition. A second signal is generated when the difference between the air temperature in the chamber and the air cooler temperature reaches a threshold difference, which can be set at a desired level. The detector generates a defrostor activation signal when and only when both first and second command signals are generated.

Abstract: An amplification-factor of the amplifier is controlled so as the output from a film-detecting-mechanism to be supplied as the input into a subtractor is adjusted fitting to a reference signal-prior to the film-insertion into the detecting mechanism. The output-signal from a comparator is supplied into the amplification-factor-variable-amplifier, in which the amplification-factor is controlled depending on the magnitude of the input-signal, and it is kept at the controlled value.Or an intensity of a light source is controlled so as the output from the film detecting mechanism to be supplied as the input into the subtractor is adjusted fitting to the reference-signal prior to the film-insertion into the detecting mechanism.

Abstract: A photographic film blackened area measuring device, having two rod shaped light conducting members, each of which is formed as an elongated piece of transparent material with part of its surface, parallel to its axis, being roughened so as to diffuse light, while light is totally internally reflected along the length of the rod shaped member from the remainder of its smooth surface. These rod shaped light conducting members are arranged one on each side of a piece of developed photographic film in a automatic film developing machine, and the film passes between them. A light emitting device is provided at one end of one of the rod shaped light conducting members, and a photo sensitive device is provided at the end of the other rod shaped light conducting member which is remote from the light emitting device.