Under the condition that the working face was directly covered with hard roof, the abrupt breaking of hard roof release significant amount of energy, thus prone to triggering dynamic disasters such as ...

The purpose of this study was to understand the dynamic behaviors of lignin-amended loess. Dynamic properties tests of lignin-amended loess with different contents and strength tests at optimum ...

Only 2-5% of all US patients are enrolled in a clinical trial. At the same time, at least 85% of clinical trials fail to meet their recruitment goals, nearly half under-enrol patients, and a striking ...