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Real-time systems (RTS) process their activities through tasks which in turn consist of a set of instances, each one of this real-time task (RTT) have six temporary constraints: arrival time, start time, execution time, end time, over time and deadline. Of these six constraints, the execution time depends directly on the software and hardware of the computer, because of that this temporary constraints varies due to external and internal factors, this variation may cause at least some instance does not satisfy the deadline, in this sense it is important to propose a model to reconstruct the behavior of the execution times for the purpose to determine the proportions of the Real-time System, propose appropriate techniques of fault tolerance and improve operating modules. Therefore in this paper, is proposed a model to reconstruct the execution times from measurements made at a program algorithm developed in the real-time operating system QNX Neutrino 6.5. This reconstruction is done by a model type autoregressive-moving-average integrated with parameter estimator constructed with a digital filtering procedure diffuse (FDD). To validate the reconstruction is used the mean square error which converges to a region close to zero and indicate that the reconstruction is good. [ABSTRACT FROM AUTHOR]

Children with infantile nephropathic cystinosis have evidence of visuospatial and arithmetic deficits on a background of normal intellectual and verbal skills. This study aimed to define further their behavioral phenotype. The Achenbach Child Behavior Checklist was completed by parents of: 64 children and adolescents with cystinosis (33 females, 31 males; mean age 8y 8mo, range 4 to 16y, SD 2y 11mo); 101 healthy controls (47 females, 54 males; mean age 8y 4mo, range 4 to 16y, SD2y 11mo); 21 children and adolescents with cystic fibrosis (CF), termed chronic-disease controls (9 females, 12 males; mean age 11y 3mo, age range 4 to 17y, SD3y 5mo). Compared with healthy controls, individuals with cystinosis had evidence of a significantly higher incidence of behavioral problems, including social problems, somatic complaints, and attention problems. Compared with the chronic-disease control group, the cystinosis group differed only on the Social Problems scale, with 22% of participants with cystinosis scoring in the ‘at risk’ range whereas no participant with CF received an elevated score on this scale. We conclude that children and adolescents with cystinosis have evidence of a significant incidence of social difficulties compared with individuals with another chronic illness and healthy participants. The combination of visuospatial problems, difficulty with arithmetic, attention problems, and social difficulties seen in the cystinosis group constitutes a behavioral phenotype of this genetic disorder. This cluster of cognitive and behavioral symptoms is also seen in the nonverbal learning disabilities syndrome, and suggests a possible early difference in brain development in children with cystinosis compared with children who do not share this genetic disorder. [ABSTRACT FROM AUTHOR]