Abstract: The antenna device A1 includes an antenna 1 configured to transmit and/or receive radio waves, and a dielectric elastomer drive element 2 including a dielectric elastomer layer 21 and a pair of electrode layers 22 sandwiching the dielectric elastomer layer 21. The dielectric elastomer drive element is capable of changing an antenna characteristic of the antenna 1. With such a configuration, the antenna device can be made smaller and lighter while improving its antenna characteristics.

Abstract: The invention of the present application intends to provide a work machine that can ensure high operability by preventing abrupt actuation of an actuator and a shock to a machine body by use of a bleed-off function at the time of starting of the actuator and that can improve the energy-saving performance by reducing a bleed-off flow rate after the starting of the actuator. For this purpose, a controller opens a bleed-off valve at a timing at which an operation device is being operated and before a flow rate of a hydraulic pump starts increasing, and closes the bleed-off valve at a timing at which the operation device is being operated and after the flow rate of the hydraulic pump has started increasing.

Abstract: This invention enables an intention of a photographer to be reflected with greater accuracy in image processing based on actions performed by the photographer when taking an image. Based on user information acquired by a user information acquisition section, supplementary information such as whether a composition flag is on or off and assignment of an image classification is recorded with an image. Based on the supplementary information, various types of image processing such as setting an image trimming range, imparting an effect, and arranging an image on a mount are performed.

Abstract: This invention enables an intention of a photographer to be reflected with greater accuracy in image processing based on actions performed by the photographer when taking an image. Based on user information acquired by a user information acquisition section, supplementary information such as whether a composition flag is on or off and assignment of an image classification is recorded with an image. Based on the supplementary information, various types of image processing such as setting an image trimming range, imparting an effect, and arranging an image on a mount are performed.

Abstract: A domed structure having a retractable roof comprises a field area obtained by digging out a hollow, substantially concave in section, in the ground and levelling the bottom of the hollow seats for the spectators are provided by extending an upward slope outwardly from the end of the field area in an endless manner, and a movable roof element is movably mounted on a rail element laid out on the ground adjacent to the peripheral edge of said hollow. The movable roof element includes a driving arrangement to be placed on the rail element. The rail element may be tilted with a gradient rising toward the direction of solar radiation.

Abstract: A domed structure having a retractable roof comprises an inside field area, a ringed structure vertically provided around said field area, two tracks laid out on the top of said ringed structure and two movable semi-vaults travelling separately on said two annular tracks, which are put one over the other when the roof is opened and are located in opposite relation to each other when the roof is formed, thereby providing a domed roof as a whole. The annular tracks laid out on the top of said ringed structure may have a gradient rising with respect to the direction of solar radiation.