Browsing Research Articles, Department of Biomedical Engineering and Mechanics by Title
Now showing items 120 of 185

Acoustic Receptivity of a BoundaryLayer to TollmienSchlichting Waves Resulting From a FiniteHeight Hump At Finite ReynoldsNumbers
(AIP Publishing, 19941101)The acoustic receptivity of a boundary layer to TollmienSchlichting (TS) waves resulting from a finiteheight hump at finite Reynolds numbers is investigated. The steady flow is calculated using an interacting boundarylayer ... 
Acoustic streaming in a waveguide with slowly varying height
(Acoustical Society of America, 19840101)An analysis of acoustic streaming in a twodimensional waveguide having slowly varying height is presented. Special attention is paid to waveguides with cross sections that are small compared to the acoustic and/or wall ... 
Acoustic wave propagation in a circular cosh duct carrying a mean flow
(Acoustical Society of America, 19870901)An analysis of acoustic wave propagation in a waveguide carrying an incompressible mean flow is presented. The radius of the waveguide is taken to vary slowly as a function of axial location. It is shown that the dynamic ... 
Acoustic waves in ducts with sinusoidally perturbed walls and mean flow
(Acoustical Society of America, 1975)An analysis is presented of the propagation of acoustic waves in a hardwalled duct with sinusoidally perturbed walls and carrying mean flow. The results show that resonance occurs whenever the wavenumber of the wall ... 
Adiabatic Following in TwoPhoton Transition
(American Physical Society, 19770301)The coherent interaction of two smoothly varying, nearresonant, twophoton pulses with a threelevel system can be described by "twophoton damped Bloch equations" which are analogous to those for a onephoton transition ... 
Algebraically growing waves in ducts with sheared mean flow
(Acoustical Society of America, 1974)Standing or traveling waves which vary algebraically with the axial distance in uniform ducts with sheared mean velocity profiles are investigated. The results show that such waves are not possible for ducts with uniform ... 
Arrival times for dissipative, nonlinear secondsound waves in solids
(American Physical Society, 19950701)We extend our original analysis begun in Tarkenton et al. [Phys. Rev. B 49, 11 794 (1994)] to include dissipative effects that are important in real cryogenic systems where nonlinear second sound exists. We present results ... 
Asymptotic Solutions Of SecondOrder Linear Equations with 3 Transition Points
(AIP Publishing, 19741201)A uniformly valid asymptotic expansion is obtained for the regular solution of a class of second_order linear differential equations with three transition points_a turning point and two regular singular points. The solution ... 
Bending vibration of cantilevered thinwalled beams subjected to timedependent external excitations
(Acoustical Society of America, 19950701)The bending vibration of cantilevered thinwalled beams of arbitrary closed cross section exposed to timedependent external excitations is investigated. The beam model used in this study incorporates a number of nonclassical ... 
Biomechanics of hair cell kinocilia: experimental measurement of kinocilium shaft stiffness and base rotational stiffness with EulerBernoulli and Timoshenko beam analysis
(Company of Biologists Ltd., 20110301)Vestibular hair cell bundles in the inner ear contain a single kinocilium composed of a 9+2 microtubule structure. Kinocilia play a crucial role in transmitting movement of the overlying mass, otoconial membrane or cupula ... 
Breakdown of structural models for vibrations of singlewall zigzag carbon nanotubes
(American Institute of Physics, 20090915)Free vibrations of zigzag singlewall carbon nanotubes (SWCNTs) of aspect ratio (length/diameter) similar to 6 and with ends tractionfree have been studied using molecular mechanics (MM) simulations with the MM3 potential. ... 
Buckling of Dielectric Elastomeric Plates for Soft, Electrically Active Microfluidic Pumps
(The Royal Society of Chemistry, 20140515)Elastic instabilities, when properly implemented within soft, mechanical structures, can generate advanced functionality. In this work, we use the voltageinduced buckling of thin, flexible plates to pump fluids within a ... 
Buckling of multiwalled carbon nanotubes under axial compression
(American Physical Society, 20060201)Buckling of singlewalled and multiwalled carbon nanotubes (SWNTs and MWNTs, respectively) due to axial compressive loads has been studied by molecular mechanics simulations, and results compared with those from the analysis ... 
Caenorhabditis Elegans Swimming in a Saturated Particulate System
(AIP Publishing, 20100301)Caenorhabditis elegans (C. elegans) is a nematode that often swims in saturated soil in nature. We investigated the locomotive behavior of C. elegans swimming in a fluid with particles of various sizes and found that the ... 
Caging the blob: using a slime mold to teach concepts about barriers that constrain the movement of organisms
(University of California Press, 20111101)Few laboratory exercises are designed to teach biology students about barriers that may constrain the movement of organisms. We describe a unique inquirybased exercise involving Lego mazes (the barrier) and the plasmodial ... 
Chaotic scattering of two identical point vortex pairs revisited
(American Institute of Physics, 20080901)A new numerical exploration suggests that the motion of two vortex pairs, with constituent vortices all of the same absolute circulation, displays chaotic scattering regimes. The mechanisms leading to chaotic scattering ... 
Close pairs of relative equilibria for identical point vortices
(American Institute of Physics, 20110501)Numerical solution of the classical problem of relative equilibria for identical point vortices on the unbounded plane reveals configurations that are very close to the analytically known, centered, symmetrically arranged, ... 
Closed 1stOrder And 2ndOrder Moment Equations For Stochastic Nonlinear Problems with Applications To Model Hydrodynamic And VlasovPlasma Turbulence
(AIP Publishing, 19760901)Working along the lines of a procedure outlined by Keller, a technique is developed for deriving closed first_ and second_order moment equations for a general class of stochastic nonlinear equations by performing a ... 
Collective behaviour across animal species
(Nature Publishing Group, 20140101)We posit a new geometric perspective to define, detect, and classify inherent patterns of collective behaviour across a variety of animal species. We show that machine learning techniques, and specifically the isometric ... 
Compact Grating Interferometer For Producing Photoresist Gratings with IncoherentLight
(Optical Society of America, 1987)An achromatic interferometer was developed to produce 1200lines/mm crossedline photoresist gratings with a mercury arc light source. It is a compact reflection system of outstanding stability. Alignment procedures are ...