GRB050904 is very interesting since it is by far the most distant GRB event known to date (z = 6.29). It was reported that during the prompt high energy emission phase, a very bright optical flare was detected, and it was temporal coincident with an X-ray flare. Here we use two models to explain the optical flare, One is the “late internal shock model”, in which the optical flare is produced by...

At the center of the macula, fovea plays an important role in computer-aided diagnosis. To locate the fovea, this paper proposes a vessel origin (VO)-based parabolic model, which takes the VO as the vertex of the parabola-like vasculature. Image processing steps are applied to accurately locate the fovea on retinal images. Firstly, morphological gradient and the circular Hough transform are use...

Statistical disclosure is a well-studied technique that an attacker can use to uncover relations between users in mix-based anonymity systems. Prior work has focused on finding the receivers to whom a given targeted user sends. In this paper, we investigate the effectiveness of statistical disclosure in finding all of a users’ contacts, including those from whom she receives messages. To this e...

Theoretically, the phase transition between the confined and deconfined phases of quarks can have a remarkable effect on the spin properties of millisecond pulsars and on the spin distribution of the population of x-ray neutron stars in lowmass binaries. In the latter class of stars, the effect has already been observed—a strong clustering in the population in a narrow band of spins. The observ...

A wide range of transport bilevel problems are investigated referring to an elementary network consisting of one Origin Destination (OD) pair, with a given demand, connected by two links. In this context it is shown that these problems, generally non-convex, exhibit several local minima. Most results are supplied in a graphical form and analytical proofs are developed for the NDP with linear in...

GRB050904 is very interesting since it is by far the most distant GRB event known to date(z = 6.29). It was reported that during the prompt high energy emission phase, a very bright optical flare was detected, and it was temporal coincident with an X-ray flare. Here we use two models to explain the optical flare, One is the “late internal shock model”, in which the optical flare is produced by ...

By a finite-rank (linear functional) system, we mean a system of linear differential, shift and q-shift operators or, any mixture thereof, whose solution space is finite-dimensional. This poster attempts to develop an algorithm for factoring finite-rank systems into “subsystems” whose solution spaces are of lower dimension. This work consists of three parts: 1. using module-theoretic language t...

Following the multistage design approach, we propose two asymptotically efficient truthful double auction mechanisms, the BC-LP mechanism and the MBC mechanism, for an exchange market with many buyers and sellers. In this market, each buyer wants to procure a bundle of commodities and each seller supplies one unit of a commodity. Furthermore, various transaction-related costs will be incurred w...

We introduce a new language and system that allows security architects to develop well-structured and easy-to-maintain security policies for Java applications. In our system, policies are first-class objects. Consequently, programmers can define parameterized meta-policies that act as policy combinators and policy modifiers, so that complex security policies can be implemented by composing simp...

This paper describes the operation with the software environment called KSM (Knowledge Structure Manager) that supports a methodology for building and reusing knowledge models. The methodology is a useful tool for developers who need to build large and complex knowledge models in real world projects. The enviroment helps developers in applying the whole methodology to build the final system and...