Occasionally, the cat's body may use vomiting to clear the intestines of toxins. If the vomit contains excessive amounts of mucus, an inflamed intestine may be the cause. Undigested food in the vomit can be due to food poisoning, anxiety, or simply overeating.
The Schmitt Trigger. The Schmitt trigger is a comparator application which switches the output negative when the input passes upward through a positive reference voltage. It then uses positive feedback of a negative voltage to prevent switching back to the other state until the input passes through a lower threshold voltage, thus stabilizing the switching against rapid triggering by noise as it passes the trigger point.
A semi-automatic firearm is a gun that, after firing ONE round, automatically loads the next round from the magazine into the chamber, ready to be fired only when the trigger is pressed AGAIN. That is, a semi-automatic gun is one trigger pull = one round fired. You have to pull the trigger again to fire another round. #3 refers to guns that require you to manually load the next round into the chamber through some special action.