Abstract: A method for avoiding data loss in a PDA. The PDA has a RAM, a battery, a central processing unit (CPU), and a nonvolatile accessible memory. The nonvolatile accessible memory has a predetermined region, and the RAM stores user information including global operating system settings. User information is backed up into the predetermined region when remaining power of the battery is lower than a default value. Further, user information from the predetermined region is restored to the RAM when system power is recovered.

Abstract: A visual angle-dependent imaging device comprises a main body; a show window on a front side of the main body, a concave portion within the show window; an inner wall of the concave portion being installed with a three-dimensional concave sculpture with a specific pattern; a lamp seat at a bottom of the main body. The lamp seat is communicated with the concave portion of the main body. A light source is installed on the lamp seat for projecting light to the concave portion of the main body. When light emitted from the light source is projected to an inner surface of the concave portion, the light is reflected from different portions of the concave portion. When a viewer views the three-dimensional concave sculpture from different viewing angles of the show window, the three-dimensional concave sculpture will project to the eyes of the viewer with a different image dependent on the viewing angle of the viewer.

Abstract: A visual angle-dependent imaging device comprises a main body; a show window on a front side of the main body, a concave portion within the show window; an inner wall of the concave portion being installed with a three-dimensional concave sculpture with a specific pattern; a lamp seat at a bottom of the main body. The lamp seat is communicated with the concave portion of the main body. A light source is installed on the lamp seat for projecting light to the concave portion of the main body. When light emitted from the light source is projected to an inner surface of the concave portion, the light is reflected from different portions of the concave portion. When a viewer views the three-dimensional concave sculpture from different viewing angles of the show window, the three-dimensional concave sculpture will project to the eyes of the viewer with a different image dependent on the viewing angle of the viewer.

Abstract: A process for hydrogenation of conjugated diene polymers comprises hydrogenating said polymer in the presence of hydrogen and a hydrogenation catalyst composition comprising: (a) at least one titanium compound represented by the following formula (a): wherein R1 and R2, which may be the same or different, represent a halogen atom, an alkyl group, an aryl group, an arakyl group, a cycloalkyl group, an aryloxy group, an alkoxy group or a carbonyl group, and Cp* represents a cyclopentadienyl group or a derivative having the formula of C5R5, and R5, which may be the same or different, represents a hydrogen atom, an alkyl group an aralkyl group and an aryl group; and (b) at least one silyl hydride.