This paper presents a reservation-based approach to schedule mixed criticality systems in a way that guarantees the schedulability of high-criticality tasks independently of the behaviour of low-criticality tasks. Two key ideas are presented: first, to reduce the system uncertainty and advance the time at which a high-criticality task reveals its actual execution time, the initial portion of it...

So far 22 criticality accidents have been reported (McLaughlin et al., 2000) including JCO accident in Japan. All cases took place with fuel solution or slurry except one case of metal fuel. It was not clear that what was actually happening during those criticality accidents except the JCO accident, for which a fission power profile was reproduced from a gammaray monitoring data (Tonoike et al....

It is becoming more and more evident that future and near future real-time systems will be required to execute on powerful multi-core hardware platforms. This requirement is born initially of necessity, as single-core architectures are being abandoned for multi-core, however, many are seeing the opportunity to utilise these powerful platforms to combine previously federated functionality. By in...

This paper introduces probabilistic analysis for fixed priority preemptive scheduling of mixed criticality systems on a uniprocessor using the Adaptive Mixed Criticality (AMC) and Static Mixed Criticality (SMC) schemes. We compare this analysis to the equivalent deterministic methods, highlighting the performance gains that can be obtained by utilising more detailed information about worst-case...

Nowadays, the embedded systems are undergoing an unprecedented trend towards integrating components or tasks of different criticality levels onto a common computing platform, as the task integration can reduce the “SWaP” (Size, Weight, and Power) related costs. Those systems, commonly referred to mixed-criticality systems, consist of functionalities with two or more distinct criticality levels,...

Industrial fields must build at the most competitive price real-time systems made of an increasing number of functionalities. This can be achieved by hosting high-criticality tasks as well as consumer real-time low-criticality tasks on a same chip. The design of such Mixed-Criticality (MC) systems requires the use of an appropriate task model and a specific scheduling strategy. In this work, in...

PURPOSE This study examined whether any of a series of segmental and whole-word measures of articulatory competence captured more of the variance in impressionistic ratings of severity of involvement in speech delay. It also examined whether knowing the age of the child affected severity ratings. METHOD Ten very experienced speech-language pathologists rated severity of involvement from conve...

Tourism has become a very important and dynamic sector both in the world economy and particular in the developing countries. Its growth affects not only the activities directly linked to tourism but also other sectors. Tourism is already an important sector in some developing countries and will become so for others. Developing countries have been fast growing in tourism industry terms in the wo...