In physics, attenuation (in some contexts also called extinction) is the gradual loss in intensity of any kind of flux through a medium. For instance, sunlight is attenuated by dark glasses, X-rays are attenuated by lead, and light and sound are attenuated by water.n engineering, attenuation is usually measured in units of decibels per unit length of medium (dB/cm, dB/km, etc.) and is represented by the attenuation coefficient of the medium in question.
PET Scan (Skull to Mid-Thigh) Cost and Procedure Information. Positron Emission Tomography, also called a PET scan, is a diagnostic examination that involves the acquisition of physiologic images based on the detection of radiation from the emission of positrons. Positrons are tiny particles emitted from a radioactive substance administered to the patient.
The initial chewing of the forage and the initial bact â¦ erial softening in the first stomach compartment do not fully process the food so it can be digested. The larger parts are regurgitated as a bolus (cud) to be further ground down and mixed with more saliva, then sent down to the other three stomach compartments. Chew Your Cud-to think deeply to oneself   Origin: In the 1500's, a lot of people owned cows and sheep. These are animals that chew their cuds (food that is spit â¦ up from the stomach to the mouth and chewed again). It is a long process.