نتایج جستجو برای: shallow depth
تعداد نتایج: 191614 فیلتر نتایج به سال:
One of the most important factors in determining the depth of foundations in structures adjacent to the water flow is the scouring phenomenon; the scouring is a phenomenon caused by the interactions between water flow and erodible bed materials, which causes the removal of sediments where hydraulic structures are located, including bridge piers. Every year, a great number of bridges are damaged...
~Palo Verde Collaboration! Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487 Department of Physics and Astronomy, Arizona State University, Tempe, Arizona 85287 Department of Physics, California Institute of Technology, Pasadena, California 91125 Physics Department, Stanford University, Stanford, California 94305 ~Received 23 June 2000; published 12 October 2...
UNLABELLED The penetration of a sealant into the tooth fissures can establish longer retention time for a pit and fissure sealant restoration. AIM This in vitro study was to evaluate the penetration ability of two low-viscosity resin materials, a composite and a compomer, applied with and without their bonding agents in comparison to an unfilled resin sealant. METHODS Forty premolars with s...
The development of large medium-speed catamarans aims increasing economic viability and reducing the possible negative influence on the environment of fast sea transportation. These vessels are likely to operate at hump speed where wave-making can be the dominating component of the total resistance. Shallow water may considerably amplify the wave-making and hence the overall drag force. Computa...
We wish to address the problems of navigation and self-motion of small AUVs in shallow water. Speci c objectives are to characterize the performance of the navigation system and Kalman lter in shallow water and energetic environments; to characterize the self-motion properties of small AUVs operating in shallow water in relation to sea-state and depth; to evaluate the suitability of small AUVs ...
Electrokinetic flows with heterogeneous conductivity configuration occur widely in microfluidic applications such as sample stacking and multidimensional assays. Electromechanical coupling in these flows may lead to complex flow phenomena, such as sample dispersion due to electro-osmotic velocity mismatch, and electrokinetic instability (EKI). In this work we develop a generalized electrokineti...
A family of two-dimensional Faraday waves in extremely shallow depth (1 mm to 2 mm) of absolute ethanol are observed experimentally using a Hele-Shaw cell that vibrates vertically. The same phenomena are not observed by means of water, ethanol solution, and silicone oil. These Faraday waves are quite different from the traditional ones. These phenomena are helpful to deepen and enrich our under...
Ultra shallow dopant profiles are one of the major challenges for ULSI silicon metrology. Following the ITRS 2002, the 90nm technology node will appear in 2004 along with the maximum drain extension in the range of 15-25 nm for both P-MOS and N-MOS devices. In this frame, a very abrupt junction with a decay length of 4 nm/decade is mandatory. A depth resolution better than 0.7 nm in profiling s...
A mathematical model and computational code are validated for predicting shallow depth explosion plume behavior. The model is based on a generalized formulation of hydrodynamics and uses an incompressible liquid assumption. This formulation is well suited for predicting longtime bubble and plume dynamics. Initial conditions for the model are derived from spherically symmetric bubble theory, com...
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