The first library in the United States to be commissioned by Carnegie was in 1886 in his adopted hometown of Allegheny, Pennsylvania (now the North Side of Pittsburgh). In 1890, it became the second of his libraries to open in the USA.
Selective exposure is a theory within the practice of psychology, often used in media and communication research, that historically refers to individualsâ tendency to favor information which reinforces their pre-existing views while avoiding contradictory information.ccuracy motivation is not always beneficial within the context of selective exposure and can instead be counterintuitive, increasing the amount of selective exposure. Defense motivation can lead to reduced levels of selective exposure.
Selective permeability help cell to take selective molecules inside in co ntrolled manner, which also important for maintaining equilibrium inside cell. Lastly selective permeability prevent entry of molecules which may have adverse effects on normal cellular functions.