A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors.
Recruitment (hiring) is a core function of human resource management. It is the first step of appointment. Recruitment refers to the overall process of attracting, shortlisting, selecting and appointing suitable candidates for jobs (either permanent or temporary) within an organization.
A: Internal recruitment refers to the identification and attraction of job candidates from within a given organization. Instead of picking candidates from the public, a company may decide to advertise a job vacancy and allow only members of the existing staff to apply in order to achieve certain goals.