Warning Signs. While a bottleâs stamped expiration date generally confirms waterâs freshness, certain physical signs may still suggest spoilage. A bent or deformed bottle indicates its overexposure to sunlight, while a strange aroma or flavor denotes staleness. Occasionally, algae may form in bottled water.
mobility (mÉÊËbÉªlÉªtÉª) n 1. (Physiology) the ability to move physically: a knee operation has restricted his mobility; mobility is part of physical education. 1  2. (Sociology) sociol (of individuals or social groups) movement within or between classes and occupations. 2  1. the quality of being mobile.
Structural mobility is a kind of vertical mobility. Structural mobility refers to mobility which is brought about by changes in stratification hierarchy itself. It is a vertical movement of a specific group, class or occupation relative to others in the stratification system. It is a type of forced mobility for it takes place because of the structural changes and not because of individual attempts. For example historical circumstances or labor market changes may lead to the rise of decline of an occupational group within the social hierarchy.