Technologies are changing the way we teach and learn in many respects. A relevant and not yet fully explored aspect is that they can support, even entice, students and teachers to go beyond the school boundaries, in spatial and temporal terms. Teachers and learners can keep in touch and work together, when they are not at school; they can access “the world” via Internet; peer to peer remote coo...

Digital watermarking has been considered as an important technique to protect the copyright of digital content. For a digital watermarking method to be effective, it is essential that a watermark embedded in a still or moving image resists against various attacks ranging from compression, filtering to cropping. As JPEG is a dominant still image compression standard for Internet applications, di...

A health warning was presented to 89 female and 19 male students aged 17-36 years via three modalities or channels of communication: a 'talking head' (video), an audiotape recording (audio) or a printed transcript (print). The verbal content of the message was identical in all three conditions. Participants' free recall, cued recall (recognition) and global recall of the message were then measu...