Optimal stability-oriented protection coordination of smart grid’s directional overcurrent relays based on optimized tripping characteristics in double-inverse model using high-set relay

Author(s):  
Ali Narimani ◽  
Hamed Hashemi-Dezaki
Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1761
Author(s):  
Aliya K. Mazitova ◽  
Guliya K. Aminova ◽  
Irina N. Vikhareva

The growing anthropogenic load on the lithosphere is currently characterized by the alienation of huge areas for solid domestic waste. One of the most common pollutants is traditional plastics with a degradation period of over 100 years. In connection with the increasing environmental requirements, polymer materials, along with a high set of technological and operational parameters, must be environmentally friendly and biodegradable. The development of polymer composite materials that undergo accelerated physicochemical and biological changes in the natural environment due to the introduction of biodegradable additives is one of the potential methods for processing synthetic materials and ensures the release of significant areas of fertile soils and lands from the steadily increasing amount of polymer waste. The use of adipic acid esters as PVC plasticizers contributes to the production of biodegradable composites. The article describes a method for obtaining new esters of adipic acid, presents the results of studying their properties for practical use in PVC composites, and assesses the economic efficiency of preventing damage to the environment when using them.


2021 ◽  
Vol 6 (2) ◽  
pp. 2814-2821
Author(s):  
Sung-Woo Kim ◽  
Buyoun Cho ◽  
Seunghoon Shin ◽  
Jun-Ho Oh ◽  
Jemin Hwangbo ◽  
...  

Author(s):  
Mahmoud A. Elsadd ◽  
Tamer A. Kawady ◽  
Abdel-Maksoud I. Taalab ◽  
Nagy I. Elkalashy

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