An important issue in the design of mobile computing systems is the efficient management of location information. In this paper, we propose the Legion structure that can be used to construct schemes for distributed applications, such as location management, information dissemination, mutual exclusion, etc. We also present a new and simple distributed quorum-based location management scheme, Leg...

The diameter of a network in the presence of faulty nodes is an important indicator of its resilience. Certain popular topologies have been shown to possess fault diameters that are only one unit greater than those of the corresponding fault1ree networks, provided that the number of faults is strictly less than the network's connectivity. Examples of such robust networks include hypercubes, m-a...

We propose a fourth-order staggered-grid finite-difference method to study dynamic faulting in three dimensions. The method uses an implementation of the boundary conditions on the fault that allows the use of general friction models including slip weakening and rate dependence. Because the staggered-grid method defines stresses and particle velocities at different grid points, we preserve symm...

commutative properties of four-dimensional generalized symmetric pseudo-riemannian manifolds were considered. specially, in this paper, we studied skew-tsankov and jacobi-tsankov conditions in 4-dimensional pseudo-riemannian generalized symmetric manifolds.

The recently emerging Advanced Metering Infrastructure (AMI) is envisioned to be one of the most prominent features of the smart grid. Security, especially authentication, is crucial for the success of large-scale AMI deployment. Unfortunately, AMI’s natural requirements — efficiency, scalability, fault-diagnoses and reliability — cannot be fully satisfied by existing authentication schemes: pe...

In this paper, synthetic aperture radar (SAR) data from ENVISAT ASAR ascending, descending and ALOS PALSAR ascending orbits are collected to investigate the coseismic displacements of the Mw 6.4 earthquake occurred in Gaize, Tibet on January 9, 2008 and the Mw 5.9 aftershock on January 16, 2008. Two interferometric phase analysis techniques, i.e., D-InSAR and multi-aperture InSAR, are employed ...

The computational operations of stochastic computing (SC) are governed by probability rules which is different from conventional arithmetic computations. Applications of SC to digital signal and image processing problems have been recently reported in the literature. To improve the computational performance of SC based finite impulse response (FIR) digital filters, a new stochastic inner produc...

The potential energy profile of an ideal binary switch is a symmetric double well. Switching between the wells without energy dissipation requires time-modulating the height of the potential barrier separating the wells and tilting the profile towards the desired well at the precise juncture when the barrier disappears. This, however, demands perfect timing synchronization and is therefore faul...

The characteristics of near-fault ground motion are investigated considering heterogeneous slip distribution on the fault plane. Areas on the fault plane with large slip in compare with the average slip on the fault are known as asperity. The characteristics of strong ground motions in near-fault area are strongly affected by faulting parameters such as asperity location, maximum slip of asperi...