River dynamics and sediment transport play an important role in river bed morphology. Building a bridge pier along the alters cross-section of causes change flow processes. These changes are mainly responsible for scour. In this paper, usage collars to reduce scour around circular piers has been investigated. The with different diameters depth positions have studied using previous data addition...

2014 We present a theoretical analysis of high-frequency optical heterodyne saturation spectroscopy in Doppler-broadened coupled three-level systems. The saturating beam, which is assumed to be amplitude modulated at frequency 03B4 (double-sideband suppressed carrier amplitude modulation) is resonant for one of the transitions. Through non-degenerate four-wave mixing processes, this modulation ...

The database research community prides itself on scalable technologies. Yet database systems traditionally do not excel on one important scalability dimension: the degree of distribution. This limitation has hampered the impact of database technologies on massively distributed systems like the Internet. In this paper, we present the initial design of PIER, a massively distributed query engine b...

This study is devoted towards evaluating seismic performance of a three-span continuous highway bridge subjected to moderate to strong earthquake ground motions in its longitudinal direction. In this regard, nonlinear dynamic analysis of the bridge based on the direct time integration approach using the 4 order Runge-Kutta method is conducted. Two types of isolation bearings are used in the ana...

The prefabricated pier structure has the advantages of low energy consumption, high mechanized level, which meets green development trend construction industry, with broad application prospects. This paper analyzes process and principle top platform bearing pier, describes bearer structure, structural operation proposed a new type structure.

Local scouring around bridge piers is a natural phenomenon caused by the erosive process of flowing stream on alluvial beds. The 3D flow field around bridge piers interacting with the bed materials increases complexity of local scour process. The local scour depth develops in accelerated flows and if it is not predicted correctly, the bottom level of local scour hole will exceed the original le...

PIER: Internet Scale P2P Query Processing with Distributed Hash Tables by Ryan Jay Huebsch Doctor of Philosophy in Computer Science University of California, Berkeley Professor Joseph M. Hellerstein, Chair Distributed database systems have long been a topic of interest in the database research community. Existing designs focus on two principles; make the distribution transparent to users and pr...

The Covid-19 pandemic has greatly affected the conditions of various sectors life, one which is construction sector. wharf project must continue requires addition health protocols to application OHS prevent spread as well monitoring and controlling implementation in area. This study aims find out how effect control on project. From results processing questionnaire data sourced from workers Desi...

By considering the near-field vertical seismic spectrum and calculating change in contact force between main beam pier, possible separation condition of a bridge is deduced. extreme value pier–beam longitudinal deformation pier under structural separation, influence on failure determined. Separation increases risk compression, bending, shear, different times lead to responses from first mode di...