Microcrack monitoring and fracture evolution of coal and rock using integrated acoustic emission and digital image correlation techniques.

The mechanical properties of a coal-rock body were examined through uniaxial compression tests, and the rupture process of the coal-rock body was monitored in real time using a combined acoustic emission (AE) monitoring system and a digital image correlation (DIC) full-field strain measurement system. From a comparison of the mechanical properties of coal and sandstone, clear differences are apparent regarding the uniaxial compressive strength, deformation characteristics, and damage mode; the brittle failure characteristics of the coal samples are also more evident. The change in AE energy reflects the accumulation and release of elastic energy during the rupture process, and the evolution of AE localization points under different stress levels can effectively reflect rupture propagation.

WeChat-based remote follow-up management reduces the burden of home care and anxiety on parents of children with refractory epilepsy: A randomized controlled study.

Objective: The present research was designed to study the effect of WeChat-based remote follow-up management on the burden of home care and anxiety on parents of children with refractory epilepsy.

Methods: 161 refractory epileptic children were included in this study. They were divided into control group and WeChat group according to their management protocols after discharge, namely, control group with traditional follow-up (n = 81) and WeChat group with remote follow-up based on WeChat (n = 81).