Energy management is an interesting research area for wireless sensor networks. Relevant dutycycling (or sleep scheduling) algorithm has been actively studied at MAC, routing, and application levels. Low power listening (LPL) MAC is one of effective dutycycling techniques. This paper proposes a novel approach called dual wake-up LPL (DW-LPL). Existing LPL scheme uses a preamble detection method...

The current study assessed whether overhearing Spanish during childhood helps later Spanish pronunciation in adulthood. Our preliminary report based on a subset of the data [Au et al., Psychol. Sci. 13, 238-243 (2002)] revealed that adults who overheard Spanish during childhood had better Spanish pronunciation, but not better morphosyntax, than adult learners of Spanish who had no childhood exp...

of the Dissertation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv Chapter

Coordination of task execution, in open distributed multi-agent systems, is often accomplished through communications between agents. Thus, most tasks carry some cost associated with those communications. The work in this article proposes to use overhearing for reducing some of this cost, and therefore reducing the overall cost of task execution. Since in open distributed systems, and in partic...

the establishment as well as the survival of mobile ad-hoc networks relies on the cooperation of nodes for performing network operations such as routing and packet forwarding. in these networks, misbehaving nodes can severely degrade network’s performance by not cooperating in networking operations. in this paper, we study the issue of node misbehavior in packet forwarding. to counter this type...

In this paper, we revisit the idea of putting interfaces to sleep during packet overhearing (i.e., when there are ongoing transmissions addressed to other stations) from a practical standpoint. To this aim, we perform a robust experimental characterisation of the timing and consumption behaviour of a commercial 802.11 card. We design μNap, a local standard-compliant energy-saving mechanism that...

According to a new Basex study, office workers spend a quarter of their day consumed by interruptions and distractions—wasting time and money (Wallis, Steptoe, & Cole, 2006). This study determined that this constant splintering and diverting of worker attention consumed up to 2.1 hours of worker productivity per day. The lost hours of productivity included not only interruptions and distraction...