Abstract Based on AUTODYN-3D finite element analysis platform, the SPH algorithm is used to simulate forming characteristics of Al/PTFE reactive Explosively Formed Projectile (EFP). The evolution behaviors and distribution morphology, velocity, density, temperature field during EFP were analyzed. Numerical simulation results show that shaped charge can form stable EFP, overall density decreases...

To date, the relation between anxiety and risky behavior engagement among adolescents is unclear. While some research has shown a positive association, other research has indicated that anxious symptoms and such engagement are inversely related. In the current multi-wave, longitudinal study, the prospective relationship between stress, anxiety symptom clusters, and risky behavior engagement is ...

Deliberate control of an entertainment robot presents a special problem in balancing the requirement for intentional behavior with the existing mechanisms for autonomous action selection. We propose that the intentional biasing of activation in lower-level reactive behaviors is the proper mechanism for realizing such deliberative action. In addition, we suggest that directed intentional bias ca...