Social network management interfaces should consider separation of contexts and tie strength. This paper shows the design process upon building the Social Cheesecake, an interface that addresses both issues. Paper and screen prototyping were used in the design process. Paper prototype interactions helped to explore the metaphors in the domain, while screen prototype consolidated the model. The ...

One of the fastest-rising keywords in the physics literature is “social”. Literally thousands of papers in physics are devoted to modeling social systems, and indeed regular sections of leading journals such as Physica A and Physical Review E are devoted to this topic. The analogy between people and particles has been so consistent that a recent popular review was appropriately titled The Socia...

The study of eigenvalue problems of various differential operators captured an enormous interest in the last decades. A large variety of papers pointed out different phenomena which can occur on the spectrum of certain differential operators. We just remember the recent advances in [3, 4, 5, 7, 8, 9, 10, 11, 12, 15, 16]. The goal of this paper is to point out certain results on an eigenvalue pr...