Sun Jingyao's research while affiliated with New York Institute of Technology and other places

With the tremendous amount of increase in cyber threats on the Internet, the security of data traveling over a network has become a significant concern for all the netizens. As a result, a large number of Internet users have started using firewalls and VPN (Virtual Private Network) to ensure more protection for their data on the go. Though mostly considered as defenders of our network security, sometimes firewalls and VPNs can also pose some serious threats to its users. Our research focuses on addressing these security flaws by providing a specific illustration of the working principles and performance of the firewalls and VPNs, including the technologies behind them and their benefits, significant potential risks it may bring due to some considerable loopholes in their architecture, and the possible solutions to those security issues. We hope that our research will bring a better understanding of these security issues and their solution to help users and organizations to deal with these security threats and risks in a better way.

The cycle time of conventional hot embossing can reach as long as 10 min due to its periodically heating and cooling steps. In recent years, researchers around the world had made great efforts to deal with this problem but still some unsolved defects left. To shorten the cycle time and reduce the energy cost therein, we proposed a new type of plate to plate isothermal hot embossing method with a cycle time down to 20 s as practical. The primary difference between two methods was the thermal pattern, that the mold temperature of our new method remained constant and uniform at a relatively low level throughout the whole process. After specific experimental device was designed and built up, polypropylene (PP)-a kind of representative semicrystalline polymer-was chosen as experimental material. In this article, the feasibility and internal mechanism of our method were discussed. The influence of mold temperature, pressure, and holding time on the replication precision of micro V-cuts were studied. Furthermore, a promising application of PP products in the field of microstructure heat exchangers was also introduced briefly.