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Query optimization is an integral part of relational database management systems. One important task in query optimization is selectivity estimation, that is, given a query <italic>P</italic>, we need to estimate the fraction of records in the database that satisfy <italic>P</italic>. Many commercial database systems maintain histograms to approximate the(More)
As an economic crop, pepper satisfies people's spicy taste and has medicinal uses worldwide. To gain a better understanding of Capsicum evolution, domestication, and specialization, we present here the genome sequence of the cultivated pepper Zunla-1 (C. annuum L.) and its wild progenitor Chiltepin (C. annuum var. glabriusculum). We estimate that the pepper(More)
Computing multidimensional aggregates in high dimensions is a performance bottleneck for many OLAP applications. Obtaining the exact answer to an aggregation query can be prohibitively expensive in terms of time and/or storage space in a data warehouse environment. It is advantageous to have fast, approximate answers to OLAP aggregation queries. In this(More)
Dopamine-glutamate interactions in the neostriatum determine psychostimulant action, but the underlying molecular mechanisms remain elusive. Here we found that dopamine stimulation by cocaine enhances a heteroreceptor complex formation between dopamine D2 receptors (D2R) and NMDA receptor NR2B subunits in the neostriatum in vivo. The D2R-NR2B interaction is(More)
4bstroet-Thrporticl~ swarm optimization algorithm is (I new methodologV in evolutionnry computation It has been found to be exfremely cffecn'vc in solving (I wide range of engineering problems, however, it b of low eflcieney in dealing with the discrete problems. In this paper, o new discrete psrticlc sworn optimization nlgorirhm bosed on quantum individual(More)
— The 3GPP LTE system has been designed to offer significantly higher data rates, higher system throughput, and lower latency for delay critical services. This improved performance has to be provided and guaranteed under various mobility conditions. Hence, handover (HO) and its performance are of high importance. This paper investigates the performance of(More)
Voltage-gated cation channels regulate neuronal excitability through selective ion flux. NALCN, a member of a protein family that is structurally related to the alpha1 subunits of voltage-gated sodium/calcium channels, was recently shown to regulate the resting membrane potentials by mediating sodium leak and the firing of mouse neurons. We identified a(More)
Multi-way Theta-join queries are powerful in describing complex relations and therefore widely employed in real practices. However, existing solutions from traditional distributed and parallel databases for multi-way Theta-join queries cannot be easily extended to fit a shared-nothing distributed computing paradigm, which is proven to be able to support(More)
The National Institute of Standards and Technology (NIST) has announced that one of the design criteria for the Advanced Encryption Standard (AES) algorithm is the efficient implementation in hardware and software. Digital Signal Processors (DSPs) are a highly attractive option for software implementations of the AES finalists since they perform certain(More)
Drought stress has long been a major constraint in maintaining yield stability of soybean (Glycine max (L.) Merr.) in rainfed ecosystems. The identification of consistent quantitative trait loci (QTL) involving seed yield per plant (YP) and drought susceptibility index (DSI) in a population across different environments would therefore be important in(More)