Puffin crossings have special sensors built in which can detect when people is there.
infra red sensors
Infrared proximity sensor.
The type of radiographs used to detect interproximal decay is called Bitewings.
Zero crossing is commonly used in mathematics and electronics. Its when the mathematical function changes represented by crossing at an axis.
The working of zero-crossing detector is to detect the transition of a signal waveform from positive and negative, providing a narrow pulse that coincides exactly with the zero condition.
You must use a special type of sensor that will detect the components and the properties of a thing.
A Propoxyphene test is used to detect Darvocet.
There isn't an online version of Animal Crossing. :(
Sound
all of them
Olfactory receptors detect smells, and gustatory receptors detect tastes.
Yes, some dogs are trained to detect lung cancer in people.