Abstract: The disclosure relates to a method of caching a part of digital content data from a content source (202), comprising the step of: acquiring the digital content data from the content source (202), wherein said part of the digital content data comprises interleaved segments (130; 131) of the acquired digital content data, and said interleaved segments (130; 131) of the acquired digital content data are stored on first storage means (203), thereby allowing for fast access to said digital content data. The disclosure moreover relates to a device for carrying out such a method. The content sources can be DVD, CD, CD-ROM, hard disk, RAM, Flash memory or remote sources accessible over a network, such as the Internet.

Abstract: A wearable device comprising at least two measuring devices (2,3,4,5,6) providing primary data, a processor (1) designed for calculating secondary data from the primary data, for calculating reference data from the primary and/or the secondary data and for comparing the reference data with at least two specific data pattern to automatically recognize an activity, and a memory (7) designed for storing the primary, the secondary data and the at least two specific data pattern each assigned to a certain activity. The activity recognition is performed by loading the primary and/or the secondary data to the processor (1), calculating the reference data, comparing the reference data with the specific data patterns, assigning the primary and/or the secondary data with the recognized activity and storing the assigned primary and/or secondary data in the memory (7).