The gradual development of the US missile defense shield from Europe to the Persian Gulf region over the past decade and the deployment of radar components and defenses of this project, both in the Persian Gulf region and in its floating zone, have plenty implications for regional and international systems and has aggravated the fragile security of the Persian Gulf region. Some issues such as t...

Attack–defense trees are used to describe security weaknesses of a system and possible countermeasures. In this paper, the connection between attack–defense trees and game theory is made explicit. We show that attack–defense trees and binary zero-sum two-player extensive form games have equivalent expressive power when considering satisfiability, in the sense that they can be converted into eac...

russia is considered the core of the former empire of the ussr. many social and structural features of the soviet :union: could be observed in the development of russia’s political power and strategic attitude. geo-political competitions between russia and the west can be traced back to the 19th century. these competitions were shaped within the framework of the balance of power system in inter...

To-date, studies have examined simultaneously the relative predictive powers of two or three factors on GPA. The present study examines the relative powers of five social/personality factors, five cognitive/learning factors, and SAT scores to predict freshmen and non-freshmen (sophomores, juniors, seniors) academic success (i.e., GPA). The results revealed many significant predictors of GPA for...

We study perturbations of the Drazin inverse of a closed linear operator A for the case when the perturbed operator has the same spectral projection as A. This theory subsumes results recently obtained by Wei and Wang, Rakočević and Wei, and Castro and Koliha. We give explicit error estimates for the perturbation of Drazin inverse, and error estimates involving higher powers of the operators.

We study moving-target defense (MTD) that actively perturbs transmission line reactances to thwart stealthy false data injection (FDI) attacks against state estimation in a power grid. Prior work on this topic lacks an analysis of the relationship between MTD's effectiveness (in detecting FDI attacks) and associated cost perturbations (incurred by grid operator). To address issue, we present fo...