Abstract: A polycarbodiimide polymer that is reversibly switchable between two distinct optical orientations is described. The polymer is useful in forming devices such as filters, storage media, actuators, and displays. Methods of making and using such polymers are also described.

Abstract: Disclosed is a method for downloading a digital work automatically bound with characteristics of a portable device, which refers to a technology of digital rights protection using an embodied system. The method achieves convenient and safe binding of digital works for a portable device. A storage space of the portable device stores digital contents and an executable program which is executed automatically after the portable device is connected to a network terminal. By this method, copyright-protected digital contents can be purchased or borrowed, and downloaded to the portable device.

Abstract: A polycarbodiimide polymer that is reversibly switchable between two distinct optical orientations is described. The polymer is useful in forming devices such as filters, storage media, actuators, and displays. Methods of making and using such polymers are also described.

Abstract: A heat dissipation device (20) includes a plurality of individual fin plates (40) arranged side by side. Each fin plate includes a main body (42). First and second flanges (44, 46) extend perpendicularly from opposite edges of the main body of each fin plate. A pair of tongues (48) is stamped perpendicularly from the main body and is opposite to the first flange. A pair of projections (49) is stamped from the main body adjacent and opposite to the second flange. Protrusions (442) are formed at the first flange and holes (482) are defined in the tongues respectively. The tabs of a first fin plate are interlocked with the projections of an adjacent second fin plate. The protrusions of the first fin plate are received in the holes of the second fin plate. In similar fashion, all the fin plates are assembled together. The heat dissipation device is thus formed.

Abstract: A heat dissipation device (20) includes a plurality of individual fin plates (40) arranged side by side. Each fin plate includes a main body (42). First and second flanges (44, 46) extend perpendicularly from opposite edges of the main body of each fin plate. A pair of tongues (48) is stamped perpendicularly from the main body and is opposite to the first flange. A pair of projections (49) is stamped from the main body adjacent and opposite to the second flange. Protrusions (442) are formed at the first flange and holes (482) are defined in the tongues respectively. The tabs of a first fin plate are interlocked with the projections of an adjacent second fin plate. The protrusions of the first fin plate are received in the holes of the second fin plate. In similar fashion, all the fin plates are assembled together. The heat dissipation device is thus formed.