Motivated by showing that in ZFC we cannot construct a special Aronszajn tree on some cardinal greater than $${\aleph _1}$$ , produce model which the approachability property fails (hence there are no trees) at all regular cardinals interval $$\left[ {{\aleph _2},{\aleph _{{\omega ^2} + 3}}} \right]$$ and $${{\aleph ^2}}}}$$ is strong limit.

background: a great deal of attention has been given to the study of learning disorders. hence, the aim of this research was to study the effect of emotion regulation training in decreasing emotion failures and self-injurious behaviors among students suffering from specific learning disorder. methods: this was an experimental study with the pre-test, post-test and a control group. research popu...

We consider a polling system with Exhaustive service policy subject to job failures or to station failures. Each of the N stations (nodes) comprising the system is, in isolation, an M/G/1type queue. Failures at each node follow a Poisson process. A job failure causes the job to be rejected from the system, while a station failure (breakdown) causes the server to switch over to the next node. Th...

Abstract The reliability and safety of any system is the most important qualitative characteristic of a system. This qualitative characteristic is of particular importance in systems whose functions are under various stresses, such as high temperature, high speed, high pressure, etc. A considerable point, which is rarely taken into account when calculating the reliability and safety of syst...