Preserving food, less fighting for food, less roaming to hunt and gather. More stable sense of community. More children. Preserving food, less fighting for food, less roaming to hunt and gather. More stable sense of community. More children.
Contrast sensitivity is the ability of an imaging process to produce an image of objects or tissues in the body that have relatively small physical differences or inherent contrast. The contrast that is to be imaged is in the form of some specific physical characteristic.
The photoelectric sensor is. able to distinguish the modulated light from ambient light. Light. sources used by these sensors range in the light spectrum from. visible green to invisible infrared. Light-emitting diode (LED) sources are typically used.