Jae Hyun Han

TL;DR: A self-powered piezoelectric pulse sensor is demonstrated to enable in vivo measurement of radial/carotid pulse signals in near-surface arteries and wireless transmission of detected arterial pressure signals to a smart phone demonstrates the possibility of self- powered and real-time pulse monitoring system.

TL;DR: Lee et al. as discussed by the authors proposed a functional ceramics group at the Korea Advanced Institute of Science and Technology (KAIST), which consists of three departments: Materials Science and Engineering, Energy Engineering, and Functional Ceramics Group.

TL;DR: In this paper, a single-crystalline (1 − x)Pb(Mg1/3Nb2/3)O3−(x)pb(Zr,Ti)O 3 (PMN-PZT) energy harvester was successfully driven with in- vivo energy harvesting enabled by high-performance single crystalstalline PZT.

TL;DR: Significant developments in speech recognition are reviewed in terms of flexible piezoelectric materials, self‐powered sensors, machine learning algorithms, and speaker recognition.

TL;DR: In this paper, a triboelectric nanogenerator (TENG) with improved performance using extremely-long sub-50nm grating patterns with high aspect ratio (4,000,000:1) fabricated by the multistep pattern downscaling (MS-PaD) method, which is advantageous in terms of fast throughput, high resolution, cost-effectiveness, industrial compatibility and large area scalability in nanofabrication.