this study aims to examine the content of isps' websites in two countries, iran and malaysia. the sample contained 31 iranian and 19 malaysian websites. each website was content analyzed for use of various interactivity functions in three dimensions of consumer – message, consumer – marketer and consumer – consumer interactivity. our findings indicate that iranian websites tend to emphasiz...

concurrency control is one of the important problems in operation systems. various studies have been reported to present different algorithms to address this problem, although a few attempts have been made to represent an overall view of the characteristics of these algorithms and comparison of their capabilities to each other. this paper presents a survey of the current methods for controlling...

The incredible growth in the capabilities and functionality of mobile devices has enabled new applications to emerge. Due to the potential for node mobility, along with significant node heterogeneity, characteristics such as very large delays, intermittent links and high link error rates pose a new set of challenges. Along with these challenges, end-to-end paths are assumed not to exist and mes...

In this paper we present the results of a practical experience on the evaluation of two message-passing middleware platforms for developing distributed applications, i.e. the ACE/TAO Real Time Event Channel (RTEC) and the Maestro/Ensemble group communication toolkit (M/E). In particular, we compare their functionalities and their performances in a simple yet meaningful deployment configuration....

The incredible growth in the capabilities and functionality of mobile devices has enabled new applications and network architectures to emerge. Due to the potential for node mobility, along with significant node heterogeneity, characteristics such as very large delays, intermittent links, and high link error rates pose a new set of network challenges. Along with these challenges, end-to-end pat...

Recent attacks on hash functions start by constructing a differential characteristic. By finding message pairs that satisfy this characteristic, a collision can be found. This paper describes the method of De Cannière and Rechberger to construct generalized characteristics for SHA-1 in more detail. This method is further generalized and applied to a simplified variant of the HAS-V hash function...

This study aims to find an effective method of expressing a message in public service ads by investigating whether or not a message framing type affects the outcome. Specifically, the study looks into the effects of messaging on organ donation by identifying how the type of message framing (positive vs. negative) and appeal type (rational vs. emotional) affect the attitude and behavioural inten...

A covert communication system is developed that modulates Morse code characteristics and that delivers its message economically and to geographically remote areas using radio and EchoLink. Our system allows a covert message to be sent to a receiving individual by hiding it in an existing carrier Morse code message. The carrier need not be sent directly to the receiving person, though the receiv...