A hierarchical procedure bridging the gap between atomistic and mesoscopic simulation for polymer-clay nanocomposite (PCN) design is presented. The dissipative particle dynamics (DPD) is adopted as the mesoscopic simulation technique, and the interaction parameters of the mesoscopic model are estimated by mapping the corresponding energy values obtained from atomistic molecular dynamics (MD) si...

Peng Wang, 2 Tao Zhou, 3 Xiao-Pu Han, and Bing-Hong Wang 4 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China Department of Physics, University of Fribourg, Fribourg 1700, Switzerland Web Sciences Center, University of Electronic Science and Technology of China, Chengdu 610054, China The Research Center for Complex System Science, University of Shan...

EVOC (for EVOlution of Culture) is a computer model of culture that enables us to investigate how various factors such as barriers to cultural diffusion, the presence and choice of leaders, or changes in the ratio of innovation to imitation affect the diversity and effectiveness of ideas. It consists of neural network based agents that invent ideas for actions, and imitate neighbors’ actions. T...

How do blogs produce posts? What local, underlying mechanisms lead to the bursty temporal behaviors observed in blog networks? Earlier work analyzed network patterns of blogs and found that blog behavior is bursty and often follows power laws in both topological and temporal characteristics. However, no intuitive and realistic model has yet been introduced, that can lead to such patterns. This ...

We use the lac operon in Escherichia coli as a prototype system to illustrate the current state, applicability, and limitations of modeling the dynamics of cellular networks. We integrate three different levels of description (molecular, cellular, and that of cell population) into a single model, which seems to capture many experimental aspects of the system.

CONTENTS 8.1 Background................................................................................................ 220 8.1.1 History and Prevalence of Diabetes .......................................... 220 8.1.2 Blood Glucose Regulation ........................................................... 220 8.1.3 Classification of Diabetes ............................................................

Tumorigenesis can be seen as an evolutionary process, in which the transformation of a normal cell into a tumor cell involves a number of limiting genetic and epigenetic events, occurring in a series of discrete stages. However, not all mutations in a cell are directly involved in cancer development and it is likely that most of them (passenger mutations) do not contribute in any way to tumorig...

In this paper, we present a formal model of group discussion dyanmics. An understanding of the face-to-face communications in a group discussion can provide new clues about how humans collaborate to accomplish complex tasks and how the collaboration protocols can be learned. It can also help us to evaluate and facilitate brainstorming sessions. We will discuss the following three findings about...