The electrocaloric (EC) effect, i.e., the reversible temperature change due to adiabatic variations of electric field, is great interest its potential technological applications in refrigeration. Based on entropy arguments, we present a new framework attain giant EC effects. Our findings are fourfold: (i) employ recently-proposed Grüneisen parameter ΓE quantify effect and discuss advantages ove...

Duty-cycle MAC protocols have been proposed for wireless sensor networks (WSNs) to reduce the energy consumed by idle listening, but they introduce significant end-to-end delivery latency. Several works have attempted to mitigate this latency, but they still have a problem on handling the packet loss. The quality of the wireless channel in WSNs is quite bad, so packets are frequently lost. In t...

Wireless Sensor Networks (WSNs) are often deployed in hostile environments to detect and collect interested events such as the appearance of a rare animal, which is called event collection system. However, due to the open characteristic of wireless communications, an adversary can detect the location of a source or sink and eventually capture them by eavesdropping on the sensor nodes’ transmiss...

Deep-learning-based 3D face recognition methods have developed vigorously in recent years, while the potential of these is being exploited more and scenarios. In this paper, an end-to-end deep learning network entitled Sur3dNet-Face for point-cloud-based proposed. The method uses PointNet, which a successful point cloud classification solution but performs unexpectedly recognition, as backbone....

In this course so far, we have studied two kinds of links that connect computers together: a point-to-point link, typically constructed from a wire, and a shared medium such as radio, for which we developed frequency division multiplexing. In a point-to-point link, the sharing of the link can be done by the switch to which the link is connected. In contrast, when using a shared medium to connec...