A metallic material, such as chromium or iron, is added to a carbon material, such as activated carbon fibers, activated carbon, graphite, carbon nanotube, or nanocarbon. Contextual information, such as that representing the assessment by a teacher for a student, can be captured by a portable ingestion device and recorded onto media for processing and mapping into rubrics. A pivoting assembly pivots the end segment between raised and lowered positions, as well as prevents the end segment from being inadvertently left in the lowered position. In a second instance, the method includes estimating the orientation of the article by calculating the duration of a timeslice, making a rotational increment matrix and taking the product of the initial orientation and the increment matrix for the appropriate number of timeslices. The light emitting devices face the light incident plane of the second light guide plate. As a result, a user may conveniently inspect and handle the incoming call even if the communication device is in the screen lock state.