Deformation and energy damage characteristics of granite-concrete composite under uniaxial compression.

To investigate the influence of the fractured rock-concrete interface on the mechanical response of the rock mass and engineering, the mechanical properties and energy evolution of granite-concrete composite specimens with 16 different fracture inclinations were examined through uniaxial compression particle flow simulation. The results show that when the relative area is constant, the larger the fracture dip angle is, the compressive strength of the composite body presents a similar "peak" type change; the dip angle appears to have the maximum value at 60 o and 90o and the minimum value at 0 o and 30 o, while the peak elastic modulus presents a "waterfall" type change, and the maximum value appears at 90o. The crack types were classified as shear cracks, tensile cracks, secondary shear cracks, secondary tensile cracks, shear-dominated mixed cracks, and tension-dominated mixed cracks.

TikTok browsing for anxiety relief in the preoperative period: A randomized clinical trial.

Objective: The purpose of this study was to determine the effect of browsing TikTok for 20 min on patients' preoperative anxiety.

Method: A randomized controlled trial was conducted at the Department of Anesthesiology of The First Affiliated Hospital, Zhejiang University School of Medicine from January 2021 to March 2021. The 80 patients were randomly divided into two groups.

[Effect of transcutaneous electrical acupoint stimulation on postoperative analgesia of ureteroscopic holmium laser lithotripsy].

Objective: To explore the effect of transcutaneous electrical acupoint stimulation (TEAS) on postoperative analgesia of ureteroscopic holmium laser lithotripsy.

Methods: One hundred and twenty adult patients, American Association of Anesthesiologists (ASA) Class Ⅰ or Ⅱ, scheduled to ureteroscopic holmium laser lithotripsy, were randomly assigned into an observation group and a control group, 60 cases in each one. The patients in the observation group were treated with TEAS for postoperative analgesia.