We determine the abundance of i-band drop-outs in the recently-released HST/ACS Hubble Ultra Deep Field (UDF). Since the majority of these sources are likely to be z ≈ 6 galaxies whose flux decrement between the F775W i-band and F850LP zband arises from Lyman-alpha absorption, the number of detected candidates provides a valuable upper limit to the unextincted star formation rate at this redshi...

Abstract BBoxDB Streams is a distributed stream processing system, which allows the handling of multi-dimensional data. Multi-dimensional streams consist n -dimensional elements, such as position data (e.g., two-dimensional positions cars or three-dimensional aircraft). The software an enhancement BBoxDB, key-bounding-box-value store that big supports continuous range queries and spatial joins;...

A porous debris bed formed after a severe accident is structure composed of different sized particles. Due to the fission reaction in bed, decay heat continuously released. Therefore, cooling ability should be investigated determine safety bed. In this paper, two-phase conservation equations with closure correlations are proposed for boiling phenomenon inside pool. For flow resistance, drag for...

This paper presents a computational study of the separated flow in a planer asymmetric diffuser. The steady RANS equations for turbulent incompressible fluid flow and six turbulence closures are used in the present study. The commercial software code, FLUENT 6.3.26, was used for solving the set of governing equations using various turbulence models. Five of the used turbulence models are availa...

Reconfigurable computing has become a hot topic in research due to its high-performance and flexibility. In this paper we present a simulator called JRSim for mesh-based reconfigurable architectures. The purpose of this simulator is to provide a platform to evaluate new architectures, and to assist in analysis of algorithms as well as the visualization of their behavior. JRSim is a platform-ind...

Linear ordinary differential equations (ODEs) with periodic coefficients appear in various interesting applications, such as determining the linear stability regions of systems of vertically driven multiple pendula. Sinha and Butcher [1, 2] have obtained very good approximations to the solutions of such equations by calculating approximate Picard iterates symbolically in the parameters on which...

This paper discusses algorithms for topic selection queries, designed to query a database containing metadata about web information resources. The metadata database contains topics and relationships, called metalinks, about topics. Topics in the database contain associated importance scores. The topic selection operator TSelection selects, within time T, topics that satisfy a given selection fo...

There is a need to integrate SQL processing with more advanced machine learning (ML) analytics to drive actionable insights from large volumes of data. As a first step towards this integration, we study how to efficiently connect big SQL systems (either MPP databases or new-generation SQL-on-Hadoop systems) with distributed big ML systems. We identify two important challenges to address in the ...