Abstract The quasi-bicircular problem (QBCP) is a periodic time-dependent perturbation of the Earth–Moon restricted three-body (RTBP) that accounts for effect Sun. It based on using solution Earth–Moon–Sun to write equations motion infinitesimal particle. paper focuses dynamics near $$L_1$$ L 1</mml:mn...

In this article, we analyze the emergence of a global security norm COVID-19 epidemic as threat to international security. This crisis is one gravest crises that humanity has experienced since end World War II in terms number people infected and died, but also economic consequences. Here, provide framework for understanding securitization an defined promoted by Health Organization entrepreneur,...

The Madry Lab recently hosted a competition designed to test the robustness of their adversarially trained MNIST model. Attacks were constrained to perturb each pixel of the input image by a scaled maximal L∞ distortion = 0.3. This decision discourages the use of attacks which are not optimized on the L∞ distortion metric. Our experimental results demonstrate that by relaxing the L∞ constraint ...