171 citations · 609 across the 22 of their papers we have counts for
23 papers
Convergence criteria for self-consistent measures in bipartite networks
János Török, Takashi Shimada, Fumiko Ogushi +3
Many quantities that characterize network elements are defined in an explicit form and calculated directly from the network structure; examples of include several centrality measur…
Homophilic organization of egocentric communities in ICT services
Chandreyee Roy, Hang-Hyun Jo, János Kertész +2
Members of a society can be characterized by a large number of features, such as gender, age, ethnicity, religion, social status, and shared activities. One of the main tie-forming…
A simple model of edit activity in Wikipedia
Takashi Shimada, Fumiko Ogushi, Janos Torok +2
A simple dynamical model of collective edit activity of Wikipedia articles and their content evolution is introduced. Based on the recent empirical findings, each editor in the mod…
Deep learning based parameter search for an agent based social network model
Yohsuke Murase, Hang-Hyun Jo, János Török +2
Interactions between humans give rise to complex social networks that are characterized by heterogeneous degree distribution, weight-topology relation, overlapping community struct…
Gravity Governs Shear Localization in Confined Dense Granular Flows
M Reza Shaebani, János Török, Maniya Maleki +4
Prediction of flow profiles of slowly sheared granular materials is a major geophysical and industrial challenge. Understanding the role of gravity is particularly important for fu…
Plato's cube and the natural geometry of fragmentation
Gábor Domokos, Douglas J. Jerolmack, Ferenc Kun +1
Plato envisioned Earth's building blocks as cubes, a shape rarely found in nature. The solar system is littered, however, with distorted polyhedra -- shards of rock and ice produce…
Stylized facts in social networks: Community-based static modeling
Hang-Hyun Jo, Yohsuke Murase, János Török +2
The past analyses of datasets of social networks have enabled us to make empirical findings of a number of aspects of human society, which are commonly featured as stylized facts o…
Multiplex Modeling of the Society
Janos Kertesz, Janos Torok, Yohsuke Murase +2
The society has a multi-layered structure, where the layers represent the different contexts. To model this structure we begin with a single-layer weighted social network (WSN) mod…
Understanding and coping with extremism in an online collaborative environment
Csilla Rudas, Olivér Surányi, Taha Yasseri +1
The Internet has provided us with great opportunities for large scale collaborative public good projects. Wikipedia is a predominant example of such projects where conflicts emerge…
What does Big Data tell? Sampling the social network by communication channels
János Török, Yohsuke Murase, Hang-Hyun Jo +2
Big Data has become the primary source of understanding the structure and dynamics of the society at large scale. The network of social interactions can be considered as a multiple…
Evolution of shear zones in granular materials
Balazs Szabo, Janos Torok, Ellak Somfai +6
The evolution of wide shear zones (or shear bands) was investigated experimentally and numerically for quasistatic dry granular flows in split bottom shear cells. We compare the be…
Multilayer weighted social network model
Yohsuke Murase, János Török, Hang-Hyun Jo +2
Recent empirical studies using large-scale data sets have validated the Granovetter hypothesis on the structure of the society in that there are strongly wired communities connecte…
Modeling Social Dynamics in a Collaborative Environment
Gerardo Iñiguez, János Török, Taha Yasseri +2
Wikipedia is a prime example of today's value production in a collaborative environment. Using this example, we model the emergence, persistence and resolution of severe conflicts…
Coexistence and Transition between Shear Zones in Slow Granular Flows
Robabeh Moosavi, M. Reza Shaebani, Maniya Maleki +3
We report experiments on slow granular flows in a split-bottom Couette cell that show novel strain localization features. Nontrivial flow profiles have been observed which are show…
Opinions, Conflicts and Consensus: Modeling Social Dynamics in a Collaborative Environment
János Török, Gerardo Iñiguez, Taha Yasseri +3
Information-communication technology promotes collaborative environments like Wikipedia where, however, controversiality and conflicts can appear. To describe the rise, persistence…
Orientational order and alignment of elongated particles induced by shear
Tamas Borzsonyi, Balazs Szabo, Gabor Toros +5
Shear induced alignment of elongated particles is studied experimentally and numerically. We show that shear alignment of ensembles of macroscopic particles is comparable even on a…
An adaptive hierarchical domain decomposition method for parallel contact dynamics simulations of granular materials
Zahra Shojaaee, M. Reza Shaebani, Lothar Brendel +2
A fully parallel version of the contact dynamics (CD) method is presented in this paper. For large enough systems, 100% efficiency has been demonstrated for up to 256 processors us…
Slow relaxation due to optimization and restructuring: Solution on a hierarchical lattice
Janos Torok, Supriya Krishnamurthy, Janos Kertesz +1
Motivated by the large strain shear of loose granular materials we introduced a model which consists of consecutive optimization and restructuring steps leading to a self organizat…
Shearing of loose granular materials: A statistical mesoscopic model
Janos Torok, Supriya Krishnamurthy, Janos Kertesz +1
A two-dimensional lattice model for the formation and evolution of shear bands in granular media is proposed. Each lattice site is assigned a random variable which reflects the loc…
Sharp crossover and anomalously large correlation length in driven systems
Y. Kafri, E. Levine, D. Mukamel +1
Models of one-dimensional driven diffusive systems sometimes exhibit an abrupt increase of the correlation length to an anomalously large but finite value as the parameters of the…
Criterion for phase separation in one-dimensional driven systems
Y. Kafri, E. Levine, D. Mukamel +2
A general criterion for the existence of phase separation in driven one-dimensional systems is proposed. It is suggested that phase separation is related to the size dependence of…
Self-Quenched Dynamics
Janos Torok, Supriya Krishnamurthy, Janos Kertesz +1
We introduce a model for the slow relaxation of an energy landscape caused by its local interaction with a random walker whose motion is dictated by the landscape itself. By choosi…
Self-organization, Localization of Shear Bands and Aging in Loose Granular Materials
Janos Torok, Supriya Krishnamurthy, Janos Kertesz +1
We introduce a mesoscopic model for the formation and evolution of shear bands in loose granular media. Numerical simulations reveal that the system undergoes a non-trivial self-or…