In this Letter we report kinetic lattice Monte Carlo simulations of vacancy-assisted diffusion in silicon. We show that the observed temperature dependence for vacancy migration energy is explained by the existence of three diffusion regimes for divacancies. This characteristic has been rationalized with an analytical model. In the intermediate temperature regime the divacancy dissociation play...

Rapid advances in hardware and wireless communication technology have made the concept of mobile computing a reality. Thus, evolving database technology needs to address the requirements of the future mobile user. The frequent disconnection and migration of the mobile user violate underlying presumptions about connectivity that exist in wired database systems and introduce new issues that affec...

Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060, Japan, School of Chemistry, University of Tasmania, GPO Box 252-75, Hobart 7001, Australia, Division of Material Science, Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060, Japan, National Industrial Research Institute of Nagoya, 1-1 Hirate-cho, Kita-ku, Nagoya 462-8510, Japan, Au...

The constrained migration problem arises in the memory management of large multiprocessor systems. Given a network of processors, each of which has its own local memory, the purpose of this problem is to nd an e cient migration strategy which locates each writable page at an appropriate processor by migration to reduce the total access cost, while considering the actual capacity of each local m...

Recent developments in population genetics are reviewed and placed in a historical context. Current and future challenges, both in computational methodology and in analytical theory, are to develop models and techniques to extract the most information possible from multilocus DNA datasets. As an example of the theoretical issues, five limiting forms of the island model of population subdivision...

The Stolt migration extension to a variable velocity case describes the velocity heterogeneity with a constant parameter, which is related to the stretch transformation of the time axis. We exploit a connection between modified dispersion relations and nonhyperbolic traveltime approximations to derive an explicit expression for the stretch parameter. This analytical expression allows one two ac...

Bacteria of the genus Wolbachia are among the most common endosymbionts in the world. In many insect species these bacteria induce a sperm-egg incompatibility between the gametes of infected males and uninfected females, commonly called unidirectional cytoplasmic incompatibility (CI). It is generally believed that unidirectional CI cannot promote speciation in hosts because infection difference...

In a scalable server that supports the retrieval and display of continuous media audio and video clips both the number of simultaneous displays and the expected startup latency of a dis play increases as a function of additional disk bandwidth This paper describes object replication and request migration as two alternative techniques to minimize startup latency In addition to developing analyti...

In migration and DMO, the kinematic problem is easier to solve than the amplitude problem. Where a purely analytical approach is normally used to obtain the amplitude of a migration operator, we attempt to obtain amplitude information by combining an assumption of a at spectrum with the kinematical formulation. This hyperbola whitening is done with a 2-D prediction-error lter. This technique is...

In this paper, we discuss efficient combinations of data migration processing and method migration processing in object database environments. When we have multiple servers and clients, it is practical to decide at a client which of the two ways should be adopted for performing each processing with a server for performance. This paper presents an analytical model of the two ways in object datab...