Body piercing is frequently done in the form of a ladder. Modern body piercing practices also include dermal anchoring or dermal piercing, which combines piercing and implantation to create a single point of opening in the body (whereas pocketing creates two) to permit one end of the jewellery to show above the surface of the skin. While this technique can be performed almost anywhere on the body, as of 2007 it was popularly done between the eyes, on the chest, or on the finger, to simulate a ring. The practice of body piercing is subject to trends and fashions. Belly button and
Whole body vibration varying degrees of success. Common modes of patient transport include hand carried stretcher (litter), ground ambulance, and air medical services which all contain multiple forms of shocks and whole-body vibrations. Measurements are taken with accelerometers to estimate the amount of vibration exposure to the human body. These measurements are taken at the human body or at the vibration source or surface. Measurements of different directions are taken to relate the motion direction with the response of the human body. Specifically, transfer functions can be used to determine the human response to the vibration. Measurement techniques for estimating exposures to whole