With the development of the Internet and multimedia technology, more and more information including audio, images, and other multimedia, are being transmitted over the Internet. Due to some intrinsic features of images, such as bulk data capacity and high correlation among pixels, traditional encryption algorithms are not suitable for practical image… (More)
Real-time systems are those which must execute all tasks within their timing constraints. Due to the catastrophic consequences of missing deadlines of some real-time tasks, fault tolerance is an essential component of such systems. This thesis introduces techniques to enhance the fault tolerance capability of real-time systems by incorporating time… (More)
The integration of system and SW functions for ef-ciency, performance and especially dependability is of interest from a research and system design perspective. In this paper, we propo s e a f r amework for directing the process of integration of SW functions, with the objective of designing and maintaining desired dependability attributes of the system… (More)
For many driven-nonequilibrium systems, the probability distribution functions of magnitude and recurrence-time of large events follow a powerlaw indicating a strong temporal correlation. In this paper we argue why these probability distribution functions are ubiquitous in driven nonequilibrium systems, and we derive universal scaling laws connecting the… (More)
Ordered bands are regarded as semirings whose multiplicative reduct is a band and whose additive reduct is a chain. We find the variety of semirings generated by all ordered bands and we determine part of the lattice of its subvarieties.