To solve the problem of water pressure fluctuation caused by the traditional double-acting intensifier, the paper has designed abrasive water-jet cutting machine based on phased intensifier as well as open numerical control system. The structure of cutting machine as well as the hardware structure and working principle of phased intensifier are introduced. The phased intensifier employs a const...

Background: Off-pump coronary artery bypass grafting (OPCABG) is an effective method for coronary artery revascularization, but it may lead to unstable hemodynamics. Purpose: To evaluate the effects of preoperative magnesium sulphate infusion on the hemodynamics in patients with OPCABG surgery. Methods: Sixty patients undergoing routine OPCABG surgery were randomly divided into control group (C...

The data presented in part 1 of this paper (Meier et al., this issue) are here used to assess the role of water input/output, water storage, and basal water pressure in the rapid movement of Columbia Glacier, Alaska. Consistently high basal water pressures, mostly in the range from 300 kPa below to 100 kPa above the ice overburden pressure, are responsible in an overall way for the high glacier...