Equivalence of internal and external stability for a class of distributed systems

1991 ◽  
Vol 4 (4) ◽  
pp. 391-409 ◽  
Author(s):  
Yutaka Yamamoto

2020 ◽  
Vol 21 (4) ◽  
pp. 124-131
Author(s):  
Kalimash Begalinova ◽  
Madina Ashilov ◽  
Alibek Begalinov

Today, regional integration and globalization have added new dimensions to the problems of violence, religious extremism and terrorism that attract a lot of attention in the academic community of many counties. A polyconfessional and polyethnic state, Kazakhstan, where various trends of world religions are inevitably present, is especially aware of the problem of religious extremism. In these conditions, interconfessional relations as a guarantor of internal and external stability in our republic is one of its most important problems. This article presents the aspects related to the religious environment and threats of religious extremism in Kazakhstan and outlines feasible solutions.



2021 ◽  
Vol 10 (4) ◽  
pp. 3334-3339
Author(s):  
Younbum Sung

Stroke patients have high foot instability and a high risk of falling down in walking and standing positions due to muscle and sensory disorders. There are many patients who complain of inconvenience in their daily lives, but independent walking is very difficult. In this work, we explore the effect on walking and dynamic balance by securing internal and external stability of the foot. Fifteen participants participated in the experiment, with 10m walk tests, timed and go tests, and functional reach tests. The walk 10m test was not statistically significant, with 0.59 ± 0.23 m/s before the device was worn and 0.66 ± 0.29 m/s after the device was worn. Timed up and Go tests were statistically significant 26.57 ± 6.12 seconds before wearing the device, 22.31 ± 4.32 seconds after wearing the device, 222.59 ± 10.31 cm before wearing the device, and 230.93 ± 11.33 cm after wearing the device. Securing internal and external stability of the foot can have a positive impact on securing a dynamic balance in which weight movement is performed.



1966 ◽  
Vol 6 (1) ◽  
pp. 89-100 ◽  
Author(s):  
D. E. Daykin ◽  
C. P. Ng

In this paper we give some algorithms for determining αw(T) and βw(T), the generalized internal and external stability numbers respectively, of a finite directed tree graph T whose nodes are weighted by a function w. We define αw(T) and βw in section 2. When w gives every node of T the weight 1 then αw(T) = α(T) and βw(T) = β(T) where α(T) and β(T) are the usual stability numbers.



2020 ◽  
Vol 14 (3) ◽  
pp. 355-359 ◽  
Author(s):  
Kamil Maciuk

AbstractThe International GNSS Service (IGS) provides high-accuracy clock products for both GNSS satellites and stations. On board of each GNSS satellite are located 3–4 atomic oscillators. In the case of CORS oscillators, the majority of them are equipped with internal oscillators and a part uses external, high-rate clocks. In the IGS network there are four types of external oscillators: quartz, rubidium, caesium and H-maser. These CORS are often reference stations for precise GNSS measurements or for time transfer. In this paper the author provides analyses of the internal and external stability of the reference stations oscillators via the usage of Allan variations. The results show a strong advantage of the external clocks over internal ones by about five orders of magnitude.



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