Abstract: Plural sectional images are acquired at a plurality of slice positions arranged in a predetermined direction in a subject. Each of the plural sectional images acquired by the image acquisition section is binarized based on a predetermined reference image density. Each image included in the sectional images binarized by the binarizing section is classified into a first image group having the images inside the subject and a second image group having the images outside the subject, based on the relative position of the each image from the other images in the same sectional image and also the relative position of the each image from other images contained in another sectional images.

Abstract: A process for separating and recovering carbonic acid gas from a methane-rich gas containing the same by a pressure swing means comprising contacting the methane-rich gas with an adsorbent for carbonic acid gas at a high pressure to obtain a refined methane gas and then desorbing the carbonic acid from the carbonic acid gas-adsorbed adsorbent at a low pressure to obtain a substantially pure carbonic acid gas.

Abstract: An electrostatic display device includes an insulative base, a substantially transparent fixed electrode mounted on the base, a substantially transparent dielectric layer such as silicon dioxide applied on the outer surface of the fixed electrode, a resilient sheet electrode fixed at one end thereof to the base and extending therefrom adjacent to the fixed electrode, a means for applying a voltage between the fixed electrode and the sheet electrode, and a display placed on or behind the inner surface of the fixed electrode. When there is no voltage between the fixed and the sheet electrodes, the display is visible through the transparent fixed electrode and the dielectric layer, whereas upon applying a voltage between the fixed and the sheet electrodes, the sheet electrode is attracted to and covers the outer surface of the fixed electrode, thereby concealing the display.