This study evaluates the role of shock wave motion on the instability of the plume exiting an over-expanded, convergent-divergent nozzle. An array of wall pressure transducers was used to track the position of the shock in time, and a Pitot probe was used to obtain simultaneous measurement of the total pressure fluctuations at various points in the jet that emerges from the separation shock. An...

In order to establish a unified spatial reference for the whole ship, inertial matching measurement of hull deformation is widely used because its continuity and concealment. However, vibration-shock signal shipborne equipment often brings short-time output disturbance user-side fibre gyroscope unit (FGU), will bring great challenges accuracy convergence measurement. To solve these problems, au...

Direct real-time visualization and measurement of laser-driven shock generation, propagation, and 2D focusing in a sample are demonstrated. A substantial increase of the pressure at the convergence of the cylindrical acoustic shock front is observed experimentally and simulated numerically. Single-shot acquisitions using a streak camera reveal that at the convergence of the shock wave in water ...

Background The timing of intravenous antibiotic administration and lactate measurement is associated with survival of septic shock patients. Septic shock patients were admitted to the medical intensive care unit (MICU) from 2 major sources: hospital ward and emergency department (ED). This study aimed to compare the timing of antibiotic administration and lactate measurement between hospital wa...

a 30-year-old female with end-stage renal disease was a candidate for dual lumen catheter placement. after catheter insertion, o2 saturation measurement of the aspirated blood from the catheter was similar to that of arterial blood. they referred the patient to our hospital after 48 hours. diagnostic procedures revealed that the tip of the catheter had entered the pleural cavity. catheter remov...

A considerable amount of energy is released in the form of shock wave from explosive charge detonation. Shock wave energy is responsible for the creation of crushing and fracture zone around the blast hole. The rest of the shock wave energy is transferred to rock mass as ground vibration. Ground vibration is conveyed to the adjacent structures by body and surface waves. Geological structures li...