Abstract The $\chi $ -stability index $\mathrm {es}_{\chi }(G)$ of a graph G is the minimum number its edges whose removal results in with chromatic smaller than that . We consider three open problems from Akbari et al. [‘Nordhaus–Gaddum and other bounds for edge-stability number’, European J. Combin. 84 (2020), Article no. 103042]. show by examples known characterisation k -regular ( $k\le 5$ ...

This thesis discusses important aspects related to voltage stability indices and their uses in electric power system analysis and operation. Some indices previously studied in the literature are reviewed and implemented in a reduced local network such as Line Stability Index (Lmn), Voltage Collapse Prediction Index (VCPI), and Power Transfer Stability Index (PTSI). In this thesis, a new index, ...

introduction salinity has various effects on plant growth by affecting physiological processes. the decline in plant productivity under saline condition, frequently linked with the reduction of photosynthetic capability. it has been reported that efficiency of psii photochemistry (fv/fm) of numerous plant species have been decreased due to salt stress studies have shown that salicylic acid (sa...

in this study, functional properties of red bean, chickpea, lentil and canellini bean were evaluated. our results revealed that beans had the highest emulsifying capacity. this property was minimum at the isoelectric point (about 4) among all samples which is in concistent with their solubility curves. salt concentration of 0.5 m did not have a significant influence on emulsifying capacity but ...

In this paper, we consider the problem of improving stability property for a class of second-order LTI systems by hybrid static output feedback. The improvement is measured in term of the stability index defined in the paper, and the systems under consideration are stabilizable with certain stability index by a single static output feedback. We show that an arbitrary desired stability index can...

background: the dispersed phase volume fraction plays key role in oil-in-water emulsion stability by different mechanisms like partial flocculation, depletion flocculation and bridging flocculation. since the mentioned mechanism is affected by emulsifier concentration presented in system, the major aim of this study was to investigate the effect of dispersed phase volume fraction on physical st...