A precise analysis of the retrieval of signature trees is presented. A signature tree is a data structure constructed over a signature file to speed up searching all those signatures, which match a given query signature. The methods used include a detailed study of probabilistic analysis in conjunction with suitable contour integration of complex variabled functions. © 2006 Elsevier B.V. All ri...

This paper presents a comparative evaluation of different distance metrics and local planners within the context of probabilistic roadmap methods for motion planning. Both C-space and Workspace distance metrics and local planners are considered. The study concentrates on cluttered three-dimensional Workspaces typical, e.g., of mechanical designs. Our results include recommendations for selectin...

<p style='text-indent:20px;'>We consider a median location problem in the presence of two probabilistic line barriers on plane under rectilinear distance. It is assumed that move their corresponding horizontal routes uniformly. We first investigate different scenarios for position and routes, then define visibility invisibility conditions along with expected barrier distance functions. Th...

Uncertainty is an essential and inescapable part of life. During the course of our lives, we inevitably make a long series of decisions under uncertainty – and suffer the consequences. Whether it be a question of deciding to wear a coat in the morning, or of deciding which soil strength to use in the design of a foundation, a common factor in these decisions is uncertainty. One may view humanki...

The observed orbits of emission-line stars may be affected by systematics owing to their broad emission lines being formed in complex and extended environments. This is problematic when orbital parameter probability distributions are estimated assuming radial-velocity data solely comprised Keplerian motion plus Gaussian white noise, leading overconfident inaccurate solutions, with implications ...

We discuss the role of break-up process of a loosely-bound projectile in subbarrier fusion reactions. Coupled-channels calculations are carried out for Be + Pb and 4,6He + U reactions by discretizing in energy the particle continuum states. Our calculations show that the coupling to the break-up channel has two effects, namely the loss of flux and the dynamical modulation of fusion potential. T...

Barrier coverage of a wireless sensor network is a critical issue in military and homeland security applications, aiming to detect intruders that attempt to cross the deployed region. While a range of problems related to barrier coverage have been investigated, little effort has been made to explore the effects of different sensor deployment strategies and mechanisms to improve barrier coverage...