Botnets are a major security threat to today’s Internet. Therefore, the detection of botnets has become a central task for network administrators. In this paper, we study the detection of botnets by monitoring and analyzing the Command and Control (C2) channels communication traffic. We note that this detection approach is effective as it detects a botnet before it engages in any harmful activi...

It has been proposed that repeating fast radio burst (FRB) sources, FRB 20180916B and 20121102A display periodic windowed behavior (PWB) in the times of detections. In PWB, events occur only within a activity window spanning fixed fraction period, but no might be detected during many periods. During UT 2020 April 28, two peaks soft gamma (detected with Insight-HXMT) were identified from repeate...

In this paper, we consider hybrid models of mechanical systems undergoing impacts, i.e., Lagrangian hybrid systems, and study their periodic orbits in the presence of Zeno behavior. The main result of this paper is explicit conditions under which the existence of stable periodic orbits for a Lagrangian hybrid system with plastic impacts implies the existence of periodic orbits in the same Lagra...

Chaotic behaviors of the buck converter were demonstrated by computer simulation studies. The paper implied theoretical considerations and simulations for this kind of converter using a sliding-mode control. The method tried to establish a periodic behavior from a chaotic one in converter behavior. Key-Words: buck converter, sliding-mode, control, bifurcation, periodic, chaotic