A recent line of inquiry investigates new forms of organizing as bundles of novel solutions to
universal problems of resource allocation and coordination: how to allocate organizational …

Collective emotional behavior of users is frequently observed on various Web portals;
however, its complexity and the role of emotions in the acting mechanisms are still not …

In online communications, patterns of conduct of individual actors and use of emotions in the
process can lead to a complex social graph exhibiting multilayered structure and …

This work aims at discovering community structure in rich media social networks through
analysis of time-varying, multirelational data. Community structure represents the latent …

Large-scale data resulting from users' online interactions provide the ultimate source of
information to study emergent social phenomena on the Web. From individual actions of …

Background Crowd-powered search is a new form of search and problem solving scheme
that involves collaboration among a potentially large number of voluntary Web users …

Social question answering (SQA) services allow users to clarify their queries by asking
questions and obtaining answers from other users. To enhance the responsiveness of such …

Interactions between users in cyberspace may lead to phenomena different from those
observed in common social networks. Here we analyse large data sets about users and …

The dynamical origin of complex networks, ie, the underlying principles governing network
evolution, is a crucial issue in network study. In this paper, by carrying out analysis to the …

Bipartite graphs are rich data structures with prevalent applications and characteristic
structural features. However, less is known about their growth patterns, particularly in …