Concepts inFriendship and mobility: user movement in location-based social networks

Social movement

Social movements are a type of group action. They are large informal groupings of individuals or organizations which focus on specific political or social issues. In other words, they carry out, resist or undo a social change. Modern Western social movements became possible through education (the wider dissemination of literature), and increased mobility of labor due to the industrialization and urbanization of 19th century societies.  more from Wikipedia

Friendship

Friendship is a relationship between two people who hold mutual affection for each other. Friendships and acquaintanceship are thought of as spanning across the same continuum. The study of friendship is included in the fields of sociology, social psychology, anthropology, philosophy, and zoology. Various academic theories of friendship have been proposed, including social exchange theory, equity theory, relational dialectics, and attachment styles.  more from Wikipedia

Social network

A social network is a social structure made up of a set of actors (such as individuals or organizations) and the dyadic ties between these actors. The social network perspective provides a clear way of analyzing the structure of whole social entities. The study of these structures uses methods of social network analysis to identify local and global patterns, locate influential entities, and examine network dynamics.  more from Wikipedia

Location-based service

Location-based services are a general class of computer program-level services used to include specific controls for location and time data as control features in computer programs. As such (LBS) is an information and has a number of uses in Social Networking today as an entertainment service, which is accessible with mobile devices through the mobile network and which uses information on the geographical position of the mobile device.  more from Wikipedia

Social structure

Social structure is a term used in the social sciences to refer to patterned social arrangements in society that are both emergent from and determinant of the actions of the individuals. The usage of the term "social structure" has changed over time and may reflect the various levels of analysis within differing sub-fields of sociology. On the macro scale, it can refer to the system of socioeconomic stratification (e.g.  more from Wikipedia

Physical law

A physical law or scientific law is "a theoretical principle deduced from particular facts, applicable to a defined group or class of phenomena, and expressible by the statement that a particular phenomenon always occurs if certain conditions be present. " Physical laws are typically conclusions based on repeated scientific experiments and observations over many years and which have become accepted universally within the scientific community.  more from Wikipedia