Recent research in real-time scheduling for mixed criticality systems has centered on an event-triggered/prioritydriven approach to scheduling. Current practice in many safetycritical domains, however, favors a time-triggered approach. We present here an effective and flexible approach for applying mode changes for time-triggered systems to handle mixed criticality job sets. It is based on a he...

Mixed criticality systems (MCS) allow software components of differing criticalities to use the same physical resources (ie. CPU, memory). MCS highlight the trade-off between partitioning components of different criticalities and efficient resource usage. Components are partitioned due to safety concerns, but physical partitioning requires more resources than if components are unpartitioned and...

The criticality of ULF (Ultra-low-frequency) magnetic variations is investigated for the 2011 March 11 Tohoku earthquake (EQ) by natural time analysis. For this attempt, some ULF parameters were considered: (1) Fh (horizontal magnetic field), (2) Fz (vertical magnetic field), and (3) Dh (inverse of horizontal magnetic field). The first two parameters refer to the ULF radiation, while the last p...

Timed failure propagation graph (TFPG) is a causal model that captures the causal and temporal aspects of failure propagation in a wide variety of engineering systems. In this paper we investigate the problem of failure prognosis within the TFPG model settings. The paper introduces a formal definition for system reliability based on measures of failure criticality, proximity between alarm obser...

Wireless sensor networks (WSNs) have been widely used in industrial systems. Their real-time performance and reliability are fundamental to industrial production. Many works have studied the two aspects, but only focus on single criticality WSNs. Mixed criticality requirements exist in many advanced applications in which different data flows have different levels of importance (or criticality)....

Recent studies of DNA sequence of letters A, C, G and T exhibit the inverse power law form frequency spectrum. Inverse power-law form of the power spectra of fractal space-time fluctuations is generic to the dynamical systems in nature and is identified as self-organized criticality. In this study it is shown that the power spectra of the frequency distributions of bases A, C, G, T in the Human...

In a cyclic executive, a series of frames are executed in sequence; once the series is complete the sequence is repeated. Within each frame, units of computation are executed, again in sequence. In implementing cyclic executives upon multi-core platforms, there is advantage in coordinating the execution of the cores so that frames are released at the same time across all cores. For mixed critic...

Self-Organized Criticality is the emergence of long-ranged spatio-temporal correlations in nonequilibrium steady states of slowly driven systems without fine tuning of any control parameter. Sandpiles were proposed as prototypical examples of self-organized criticality. However, only some of the laboratory experiments looking for the evidence of criticality in sandpiles have reported a positive...

Mixed-criticality systems integrate components of different criticality. Different criticality levels require different levels of confidence in the correct behavior of a component. One aspect of correctness is timing. Confidence in worst-case execution time (WCET) estimates depends on the process by which they have been obtained. A somewhat naive view is that static WCET analyses determines saf...

For the two dimensional classical XY model we present extensive high temperature -phase bulk data extracted based on a novel finite size scaling (FSS) Monte Carlo technique, along with FSS data near criticality. Our data verify that η = 1/4 sets in near criticality, and clarify the nature of correction to the leading scaling behavior. However, the result of standard FSS analysis near criticalit...