Alexei Vazquez Center for Cancer Systems Biology, Dana Farber Cancer Institute 44 Binney St, Boston, MA 02115, USA Department of Physics and Center for Complex Networks Research University of Notre Dame, IN 46556, USA (Dated: March 10, 2006) Abstract Our experience of web access slowing down is a consequence of the aggregated web access pattern of web users. This is just one example among sever...

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The detection and nuisance concentrations of odors are frequently quoted in terms of dilutions from the initial source concentration. Meteorological dispersion modeling has been used to estimate the dilutions achieved between a release point, such as a stack, and a downwind receptor. Conventional models have proven to yield reasonable results for neutral and stable atmospheric conditions, withi...

The purpose of this paper is to present a general overview of impact analysis and some of the most important approaches in this area. It is not intended to provide a tutorial on impact with all the required mathematical developments. The paper is a preliminary literature survey by the authors whose goal is to develop a sound and a practical methodology to analyze impact and implement it within ...

In this paper we present a model of impact dynamics in large dimensional systems. We describe a hybrid method, based on graph theory and probability theory, which enables us qualitatively to model the statistics of global dynamics as parameters are varied. Direct numerical simulation reveals a sudden jump from no impacts within the system to many repeated impacts at a critical value of system p...

We investigate models of opinion formation which are based on the social impact theory. The following approaches are discussed: (i) general mean field theory of social impact, (ii) a social impact model with learning, (iii) a model of a finite group with a strong leader, (iv) a social impact model with dynamically changing social temperature, (v) a model with individuals treated as active Brown...

Beer tapping is a well known prank where a bottle of beer is impacted from the top by a solid object, usually another bottle, leading to a sudden foam overflow. A description of the shock-driven bubble dynamics leading to foaming is presented based on an experimental and numerical study evoking the following physical picture. First, the solid impact produces a sudden downwards acceleration of t...

Rigid-body dynamics with unilateral contact is a good approximation for a wide range of everyday phenomena, from the operation of car brakes to walking to rock slides. It is also of vital importance for simulating robots, virtual reality, and realistic animation. However, correctly modeling rigid-body dynamics with friction is difficult due to a number of discontinuities in the behavior of rigi...

Bifurcations of dynamical systems described by several second order differential equations and by an impact condition are studied. It is shown that the variation of parameters when the number of impacts of a periodic solution increases, leads to the occurrence of a hyperbolic chaotic invariant set. DOI: 10.4018/ijeoe.2012100102 16 International Journal of Energy Optimization and Engineering, 1(...

In this paper, a selected analysis of the dynamics in an example impact microactuator is performed through a combination of numerical simulations and local analysis. Here, emphasis is placed on investigating the system response in the vicinity of the so-called grazing trajectories, i.e. motions that include zero-relative-velocity contact of the actuator parts, using the concept of discontinuity...