P.3 Section

We consider a system of random walks or directed polymers interacting with an environment which is random in space and time. It was shown by Imbrie and Spencer that in spatial dimensions three or above the behavior is diffusive if the directed polymer interacts weakly with the environment and if the random environment follows the Bernoulli distribution. Under the same assumption on the random e...

In wireless sensor networks, it is crucial to design and employ energy-efficient communication protocols, since nodes are battery-powered and thus their lifetimes are limited. Such constraints combined with a great number of applications used in these networks, pose many challenges (limited energy, low security...) to the design and management of wireless sensor networks. These challenges neces...

We consider a system of random walks or directed polymers interacting with an environment which is random in space and time. Under minimal assumptions on the distribution of the environment, we prove that this system has diffusive behavior with probability one if d > 2 and fl < flo, where flo is defined in terms of the probability that the symmetric nearest neighbor random walk on the d-dimensi...

Directed diffusion (DD), uses mechanisms such as data aggregation and in-network processing to suppress the additional data overhead however there is no guarantee that paths from nearby sources join after a few hops. In cases where sensed event is spread geographically, the probability of such combination is reduced. Another problem arises in presence of many source nodes near a single event. I...

Directed classical current that increases linearly with time without using a biased external field is obtained in a simple model Hamiltonian system derived from a modified kicked rotor model, by breaking the spatial symmetry of the transporting regular islands in the classical phase space. A parallel study of the corresponding quantum dynamics suggests that although quantum coherence effects su...

Alejandro Tejedor,1, ∗ Anthony Longjas,1 Efi Foufoula-Georgiou,1 Tryphon Georgiou,2 and Yamir Moreno3, 4, 5 Department of Civil and Environmental Engineering, University of California, Irvine, Irvine, CA 92697, USA 2 Department of Mechanical and Aerospace Engineering, University of California, Irvine, Irvine, CA 92697, USA Institute for Biocomputation and Physics of Complex Systems (BIFI), Univ...

Researchers are paying more and more attention to the application of wireless sensor networks (WSNs), where routing is one of the vital techniques. An advanced Directed Diffusion protocol, named DDOR, is presented in this paper based on Opportunistic Routing to improve the disadvantage of mono-forwarder of traditional routing protocol. Packet head has been modified in order to implement a forwa...

We study a model that generalizes the CP with diffusion. An additional transition is included in the model so that at a particular point of its phase diagram a crossover from the directed percolation to the compact directed percolation class will happen. We are particularly interested in the effect of diffusion on the properties of the crossover between the universality classes. To address this...

a r t i c l e i n f o JEL classification: F43 J31 O31 O33 Keywords: Technological knowledge International trade Human capital Wage inequality By connecting the North–South diffusion and the bias of non-scale technological knowledge and by considering endogenous human capital, we relate the technological-knowledge diffusion with levels, inter-country gaps, growth rates, wage-inequality paths and...