Definition of acupressure : the application of pressure (as with the thumbs or fingertips) to the same discrete points on the body stimulated in acupuncture that is used for its therapeutic effects (such as the relief of tension or pain) â compare shiatsu
The SVI is the volume, in milliliters, occupied by 1 gram of settled activated sludge, and it is a measure of the settling characteristics of the sludge.
The term vertical speed indicator or VSI is most often used for the instrument when it is installed in a powered aircraft. The term variometer is most often used when the instrument is installed in a glider or sailplane. An Inertial-lead or Instantaneous VSI (IVSI) uses accelerometers to provide a quicker response to changes in vertical speed.