The Internet has a very complex connectivity recently modeled by the class of scale-free networks. This feature, which appears to be very efficient for a communications network, favors at the same time the spreading of computer viruses. We analyze real data from computer virus infections and find the average lifetime and persistence of viral strains on the Internet. We define a dynamical model ...

this study investigated the effectiveness of explicit pragmatic instruction on the acquisition of requests by college-level english as foreign language (efl) learners in taiwan. the goal was to determine first whether the use of explicit pragmatic instruction had a positive effect on efl learners’ pragmatic competence. second, the relative effectiveness of presenting pragmatics through two deli...

Faults in computer networks may result in millions of dollars in cost. Faults in a network need to be localized and repaired to keep the health of the network. Fault management systems are used to keep today’s complex networks running without significant cost, either by using active techniques or passive techniques. In this paper, we propose a novel approach based on imperialist competitive alg...

Cellular Wireless Wide Area Networks (WWANs) are most prevalent and offer highbandwidth data transfer. We believe WWANs can be availed for voice communications employing Voice Over IP technologies. Such a communication will be of better quality and offer higher resilience compared to voice communication over a cellular phone (using cellular voice networks). We present a Quality of Service analy...

Computer aided design and computer aided modeling tools are becoming increasingly important in the design and performance evaluation of communication systems. In this work, we report on the computer simulation modeling study of terrestrial digital microwave radio transmission, using Block Oriented System Simulator package (BOSS). The work concentrates on semi-analytical error rate evaluation in...

We present a latency hiding protocol for asynchronous message passing in UNIX environments. With this protocol distributed parallel computing can be utilized to solve applications, which can be structured such that useful computation overlaps communication, in a more efficient way than possible with current standard technologies. To maintain portability our protocol is layered on top of the Ber...

Since its emergence from the early 1980s, the field of Human Computer Interaction has moved on and advanced in many significant ways. It has opened up a world in which communication between human and computer has become easier and richer. Among the different modes of interaction, Gestures provide the most natural and convenient way of communication. Hence gesture recognition has been extensivel...