Graphene-based Two-Stage Enhancement Pressure Sensor for Subtle Mechanical Force Monitoring

The development of pressure sensors with high sensitivity and a low detection limit for subtle mechanical force monitoring and the understanding of the sensing mechanism behind subtle mechanical force monitoring are of great significance for intelligent technology. Here, we proposed a graphene-based two-stage enhancement pressure sensor (GTEPS), and we analyzed the difference between subtle mechanical force monitoring and conventional mechanical force monitoring. The GTEPS exhibited a high sensitivity of 62.2 kPa-1 and a low detection limit of 0.1 Pa. Leveraging its excellent performance, the GTEPS was successfully applied in various subtle mechanical force monitoring applications, including acoustic wave detection, voice-print recognition, and pulse wave monitoring. In acoustic wave detection, the GTEPS achieved a 100% recognition accuracy for six words. In voiceprint recognition, the sensor exhibited accurate identification of distinct voiceprints among individuals. Furthermore, in pulse wave monitoring, GTEPS demonstrated effective detection of pulse waves. By combination of the pulse wave signals with electrocardiogram (ECG) signals, it enabled the assessment of blood pressure. These results demonstrate the excellent performance of GTEPS and highlight its great potential for subtle mechanical force monitoring and its various applications. The current results indicate that GTEPS shows great potential for applications in subtle mechanical force monitoring.

Exploring the Impact of an AVRS Curfew Program on Recidivism of Juvenile Probationers in Korea

Community corrections agencies across the world have adopted biometric technologies as a security tool and cost-effective monitoring strategy. This study investigates the effectiveness of the automated voiceprint recognition supervision (AVRS) curfew program for 386 Korean juvenile probationers from the Seoul Probation Office. Although the AVRS curfew program in Korea has been in effect for more than 14 years, effectiveness of the program has not been fully tested. A propensity score analysis was conducted to assess the effectiveness of the AVRS program, controlling for potential covariates of referring juveniles to the program. Contrary to expectations, a logistic regression analysis demonstrated that the innovative curfew program is a statistically significant factor in increasing the odds of recidivism. The article concludes with a discussion of implications for court-ordered juvenile curfew programs.