Knowledge compilation is a common technique for propositionallogic knowledge bases. A given knowledge base is transformedinto a normal form, for which queries can be answered efficiently. Thisprecompilation step is expensive, but it only has to be performed once.We apply this technique to...

The efficiency of marketing campaigns is a preconditionfor business success. This paper discusses a technique totransfer advertisement content vie Bluetooth technology andcollects market research information at the same time. Conventionaladvertisement media were enhanced by devices...

Conventional security infrastructures in the Internet cannot be directlyadopted to ambient systems, especially if based on short-range communi-cation channels: Personal, mobile devices are used and the participants arepresent during communication, so privacy protection is a crucial issue....