Concepts inUser interactions in social networks and their implications

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

Social graph

The social graph is a term coined by scientists working in the social areas of graph theory to describe a sociogram which depicts all personal relations. It has been referred to as "the global mapping of everybody and how they're related".  more from Wikipedia

Small-world network

A small-world network is a type of mathematical graph in which most nodes are not neighbors of one another, but most nodes can be reached from every other by a small number of hops or steps.  more from Wikipedia

Sociology

Sociology is the scientific study of society . It is a social science (a term with which it is sometimes synonymous) which uses various methods of empirical investigation and critical analysis to develop a body of knowledge about human social activity. For many sociologists the goal is to conduct research which may be applied directly to social policy and welfare, while others focus primarily on refining the theoretical understanding of social processes.  more from Wikipedia

Reality

In philosophy, reality is the state of things as they actually exist, rather than as they may appear or might be imagined. In a wider definition, reality includes everything that is and has been, whether or not it is observable or comprehensible. A still more broad definition includes everything that has existed, exists, or will exist. Philosophers, mathematicians, and others ancient and modern such as Aristotle, Plato, Frege, Wittgenstein, Russell etc.  more from Wikipedia

Hypothesis

A hypothesis (from Greek ¿¿¿¿¿¿¿¿; plural hypotheses) is a proposed explanation for a phenomenon. The term derives from the Greek, ¿¿¿¿¿¿¿¿¿¿ ¿ hypotithenai meaning "to put under" or "to suppose". For a hypothesis to be put forward as a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories.  more from Wikipedia