The structure of an online social network in most cases cannot be described just by links between its members. We study online social networks, in which members may have certain attitude, positive or negative, toward each other, and so the network consists of a mixture of both positive and negative relationships. Our goal is to predict the sign of a given relationship based on the evidences pro...

We investigate a class of continuum models for the motion of a twodimensional biological group under the influence of nonlocal social interactions. The dynamics may be uniquely decomposed into incompressible motion and potential motion. When the motion is purely incompressible, the model possesses solutions which have constant population density and sharp boundaries for all time. Numerical simu...

One of the most important challenges for embodied and grounded theories of cognition concerns the representation of abstract concepts, such as "freedom." Many embodied theories of abstract concepts have been proposed. Some proposals stress the similarities between concrete and abstract concepts showing that they are both grounded in perception and action system while other emphasize their diffe...

We consider social networks in which links are associated with a sign; a positive (negative) sign indicates friendship (animosity) between the connected nodes. Recent work studies such large online signed networks by applying theories that stem from the notion of social balance. Computing the social balance of a signed network requires counting the distinct configurations of the signed edges wi...

The article presents the analysis and generalizations, scientific justifications views of scientists on sign-symbolic system. Under this system, "symbol" category "sign" are separated. sign is defined as a material definition, symbol treasure trove meanings, since it has unique ability not only to accumulate age-old values our predecessors, but also form new semantic constructs through disclosu...

conclusions in 88% of primary osteoarthritis cases we found fai morphology on the ap pelvic radiograph, similarly to those found in the bibliography, and we considered naming primary osteoarthritis, secondary osteoarthritis caused by fai. in the majority of cases, early diagnosis with simple, cheap and easily accessible ap pelvic radiograph with low dose of radiation may also be warranted backg...

We model a close-knit community of friends and enemies as a fully connected network with positive and negative signs on its edges. Theories from social psychology suggest that certain sign patterns are more stable than others. This notion of social "balance" allows us to define an energy landscape for such networks. Its structure is complex: numerical experiments reveal a landscape dimpled with...