grown in exploring AI approaches to design problems, both because of the enormous potential impact on productivity of improved design tools and because of the interesting basic AI issues that these problems raise. In particular, a number of ship designers and AI researchers recently became interested in applying AI to the hydrodynamic design of ship hulls. A typical problem here is to design th...

In this paper we solve the problem of describing all nonlocal Hamiltonian operators of hydrodynamic type with flat metrics and establish that this nontrivial special class of Hamiltonian operators is closely connected with the associativity equations of twodimensional topological quantum field theories and the theory of Frobenius manifolds. It is shown that the Hamiltonian operators of this cla...

Submitted for the DFD10 Meeting of The American Physical Society Hydrodynamic interaction of two unsteady squirmers TAKUJI ISHIKAWA, DAVIDE GIACCHE, Tohoku University — The study of pair-wise interactions between swimming microorganisms is fundamental to the understanding of the rheological and transport properties of semi-dilute suspensions. In this study, the hydrodynamic interaction of two c...

The use of acoustic cavitation for water and wastewater treatment (cleaning) is a well known procedure. Yet, the use of hydrodynamic cavitation as a sole technique or in combination with other techniques such as ultrasound has only recently been suggested and employed. In the first part of this paper a general overview of techniques that employ hydrodynamic cavitation for cleaning of water and ...

The general objective of the work underway is to develop a baseline characterization of the spatial and temporal variability in optical/acoustical water properties for tropical island environments in response to variations in physical forcing. OBJECTIVES Specifically, the project aims to address the following questions:-What are the dominant space and time scales for variability in optical and ...

The caudal fins of adult zebrafish are supported by multiple bony rays that are laterally interconnected by soft interray tissue. Little is known about the fin's mechanical properties that influence bending in response to hydrodynamic forces during swimming. Here, we developed an experimental setup to measure the elastic properties of caudal fins in vivo by applying micro-Newton forces to obtai...

The unsaturated soil hydraulic properties (the soil water characteristic and relative permeability curves) are key hydrodynamic parameters in the fields of soil science and civil engineering. Because of the strong dependency of these properties on water content, their determination is subject to considerable experimental and numerical problems. Difficulties increase when the soil approaches ove...

M. .any physical systems, hydrodynamic, mechanical, acoustical, and electrical, are analogous. This article is concerned with the development of an electrical model which is analogous to the hydrodynamic and mechanical properties of the human eye. In general, changes in these properties of the eye, occasioned by any test, procedure, or altered physiology should be matched or reproduced by this ...

In this work, three different particle sizes: the static radius Rs, hydrodynamic radius Rh and apparent hydrodynamic radius Rh,app obtained using the light scattering technique, are investigated for dilute poly-disperse homogenous spherical particles with a simple assumption that the hydrodynamic radius is in proportion to the static radius, when the Rayleigh-Gans-Debye approximation is valid. ...