Yongdong Wang

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This, paper. examines five application cache consistency algorithms m a cltent/server database system: two-phase locking, certification, callback locking, no-wait locking, and no-wait locking with notification. A simulator was developed to compare the average transaction respnse time and server throughput for these algorithms under different workloads and(More)
This paper presents the impact of traffic shaping on enhancing the interactive video quality over ATM networks. The effects of the leaky bucket traffic shaper on the video quality is studied under different token buffer rates and token buffer sizes, and the tradeoffs involved are discussed. An enhanced traffic shaper using the early drop mechanism is then(More)
Salinization and secondary salinization often appear after irrigation with saline water. The Taklimakan Desert Highway Shelterbelt has been irrigated with saline ground water for more than ten years; however, soil salinity in the shelterbelt has not been evaluated. The objective of this study was to analyze the spatial and temporal distribution of soil(More)
Campylobacter species.are phenotypically diverse in many aspects including host habitats and pathogenicities, which demands comprehensive characterization of the entire Campylobacter genus to study their underlying genetic diversification. Up to now, 34 Campylobacter strains have been sequenced and published in public databases, providing good opportunity(More)
Clathropteris was a typical dipterid fern with well documented fossil record and was widely dispersed during the Mesozoic; however, our knowledge of fertile structures including in situ spores for this genus is still very limited. Here we report well-preserved compression specimens of Clathropteris obovata Oishi from the Late Triassic of Guangyuan, Sichuan(More)
Foodborne illness presents a public health challenge in USA. There is an urgent need for the federal government and food industries to expand efforts to prevent any food contamination that potentially could be harmful to human health. The Food Safety Laboratory (FSL), ARS, USDA, is one of the leading laboratories for the development of optoelec-tronic(More)
Using wavelet transforms method, time-frequency characteristics of pulse signals from 15 heroin addicts and 15 healthy persons were analyzed. According to 3-D and contour plots used to display discrete dyadic wavelet transforms, the significant difference of time-frequency characteristics between the signals of heroin addicts and healthy persons were(More)
  • Jingeng Sha, Nicol Mort On, Yongdong Wang, Paul Olsen, Grzegorz, Gregory Pienkowski +2 others
  • 2006
The Jurassic, spanning about 201 to 145 is an important period in geological history for the evolution of life and Earth. Numerous global events happened during this period : (1) Tectonic activity was at a very high level, the breakup and drifting of Pangea, associated with extensive volcanism at the beginning of Jurassis in the Central Atlantic province(More)
This paper presents the impact of traffic shaping on the quality of MPEG-2 video transmissions over ATM networks. The performance evaluation is accomplished by simulating an ATM network using real MPEG2 video streams from video broadcast applications. First, it is shown how cell loss influences the perceived video quality. Cell loss can result in either(More)