Statistical properties of the static networks have been extensively studied. However, online social networks are evolving dynamically, understanding the evolving characteristics of the core is one of major concerns in online social networks. In this paper, we empirically investigate the evolving characteristics of the Facebook core. Firstly, we separate the Facebook-link(FL) and Facebook-wall(F...

We analyze cooperative Cournot games with externalities. Due to cognitive constraints, the members of a coalition cannot accurately predict the coalitional actions of the non-members. Thus, they compute their value following simple heuristics. In particular, they assign various non-equilibrium probability distributions over the outsiders’ set of partitions. We construct the value function of a ...

In this paper we establish a relationship between the core cover of a compromise admissible game and the core of a particular bankruptcy game: the core cover of a compromise admissible game is, indeed, a translation of the set of coalitional stable allocations captured by an associated bankruptcy game. Moreover, we analyze the combinatorial complexity of the core cover and, consequently, of the...

the relationship between moscow and the peripheral republics of the soviet :union: has been a controversial issue. the complicatedness and implications of this relationship was to a degree recognized during the soviet era. yet it was after the collapse of the communist regime that its real scope and significance were revealed, especially in central asian and caucasian republics where a variety ...

Background: Parkinson's disease as a progressive disorder of the nervous system leads to the disability of postural control system. Objectives: In the present study the effects of Pilates exercises on functional balance in patients with Parkinson's was investigated. Materials and Methods: This control trial included 30 patients with idiopathic Parkinson's disease who were selected as subj...

infection with hepatitis c virus (hcv) is a worldwide problem. among hcv proteins, core antigen (ag), besides its importance for diagnostic application is a prime candidate for component of a vaccine. herein, we report results of studies on production of the hydrophilic domain of core ag (2-122) in native conformation by an arabinose induction system in e.coli and the primary characterization o...

We analyze the core of a cooperative Cournot game. We assume that when contemplating a deviation, the members of a coalition assign positive probability over all possible coalition structures that the nonmembers can form. We show that when the number of firms in the market is sufficiently large then the core of the underlying cooperative game is non-empty. Moreover, we show that the core of our...