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In addition to door and window sensors, motion detectors are essential components of a home security system. While door and window sensors alert you when someone is actively entering your home, motion sensors alert you when someone is lurking in or around your home. Although there are different types of motion detectors, most of them use similar intrusion detection technologies: they detect small changes like temperature, vibration, or radiation in the rooms they cover.

SIM (Subscriber Identification Module) cards very often unless you're buying a new phone and need to transfer the card from your old device to your new one, along with the information stored in the phone. cards are simple pieces of plastic with silicon chips, similar to those found in credit cards and hotel key cards, that contain a processor and memory circuitry for storing up to 256 KB of digital information.

The milk ejection reflex is caused by combined neurogenic and hormonal reflexes that release oxytocin from the posterior pituitary gland. The combined action of prolactin and oxytocin causes the excretion of milk. Lactation can be defined as the process of milk secretion by the mammary glands of the woman after childbirth.

"picture element" is actually a short term of the "pixel". These tiny dots make up the image on computer screens, whether they're flat panel displays (LCDs) or cathode ray tubes (CRTs). A matrix of thousands or even millions of pixels is divided that is present on the screen of the monitor. Normally you don't see individual pixels because they are so small. This is good because most people prefer to see crisp, clean images over blocky "pixelated" images.