In this paper, we report on the development of touchless interfaces for supporting long lasting tasks, which need an interleaving between the interaction with the system and the focus on other activities. As an example, we considered a dish cooking task, which enables selecting and browsing the information about different recipes while cooking through gestural and vocal interaction. The applica...

Memory for an interactive procedure learnt from written instructions is improved if the procedure can be carried out while the instructions are being read. The size of the read-act cycle was manipulated by comparing “chunked” instruction-following, in which 3 or 4 steps are read then enacted, with single-step conditions. In two experiments, enforced chunking improved subsequent unaided performa...

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This paper presents an efficient burst error spreading tool. Also, it studies a vital issue in wireless communications, which is the transmission of images over wireless networks. IEEE ZigBee 802.15.4 is a short-range communication standard that could be used for small distance multimedia transmissions. In fact, the ZigBee network is a Wireless Personal Area Network (WPAN), which needs a strong...

Use cases are a powerful and widely recognised tool for functional requirements elicitation and specification of prospective software applications. However, there still are major problems and misunderstandings about the use case approach. One of these is the troublesome notion of use case interleaving which is discussed in this work. Interleaving is still present in the current UML specificatio...

This paper compares different approaches for computing power products ∏ 1≤i≤k g ei i in commutative groups. We look at the conventional simultaneous exponentiation approach and present an alternative strategy, interleaving exponentiation. Our comparison shows that in general groups, sometimes the conventional method and sometimes interleaving exponentiation is more efficient. In groups where in...