Abstract: A vibration generation apparatus includes a concave frame, a vibrator, and a first damper. The frame has an opening in upper portion thereof. The vibrator is housed in the frame. The first damper is connected to the vibrator and the frame and is configured to hold the vibrator such that the vibrator is able to move in an up-down direction with respect to the frame. The first damper has a predetermined thickness. The first damper is in an N-shape in a side view and includes two bent portions and has an upper end mounted on an edge of the opening and a lower end mounted on a lower edge of the vibrator.

Abstract: A vibration generation apparatus includes a concave frame, a vibrator, and a first damper. The frame has an opening in upper portion thereof. The vibrator is housed in the frame. The first damper is connected to the vibrator and the frame and is configured to hold the vibrator such that the vibrator is able to move in an up-down direction with respect to the frame. The first damper has a predetermined thickness. The first damper is in an N-shape in a side view and includes two bent portions and has an upper end mounted on an edge of the opening and a lower end mounted on a lower edge of the vibrator.

Abstract: The hit rate of when the application using a plurality of classes of data whose generation times are close to each other is not sufficiently high currently. A data management device of the present invention includes: utilization status storage means for storing a combination of a plurality of data classes used by an application; combination creation means for extracting, from data storage means storing data which is given one of the data classes, a combination of the data in which a difference of generation times between the data in the combination is within a prescribed time interval, from the combination of the data given respective ones of the data classes stored in the utilization status storage means; and discard determination means for determining, from the data stored in the data storage means, data other than those belonging to the extracted the combination to be candidates of deletion.