Bimetallic nanorods are propelled without chemical fuels in megahertz (MHz) acoustic fields, and exhibit similar behaviors to single-metal rods, including autonomous axial propulsion and organization into spinning chains. Shape asymmetry determines the direction of axial movement of bimetallic rods when there is a small difference in density between the two metals. Movement toward the concave e...

To better understand the subsurface velocity field and flowing layer structure, we have performed a detailed numerical study using the discrete element method for the flow of monodisperse particles in half-full three-dimensional (3D) and quasi-2D rotating tumblers. Consistent with prior measurements at the surface, a region of high speed flow with axial components of velocity occurs near each e...

Axial pumps have a wide range of applications, and cavitation is one of the main causes of there performance degradation. So, the present study investigates experimentally and numerically the performance of cavitating axial pumps. In this study a three-dimensional Navier-Stokes code was used (CFDRC, 2004) to model the two-phase flow field around a four blades axial pump. The governing equations...

Pencil Grasp Pattern: How Critical is it to Functional Handwriting? Heidi D. Schwellnus Doctor of Philosophy Graduate Department of Rehabilitation Science University of Toronto 2012 This thesis reports the results of a large study to evaluate the kinetics of pencil grasp patterns in terms of speed and legibility of handwriting of children in Grade 4. Current clinical practice as recent as 2008 ...

New features of the linear stability of the spiral Poiseuille flow for a wide range of inner and outer independent rotation speeds of the cylinders and imposed axial pressure gradient are investigated. The analysis is focused on the corotating situation and for a particular radius ratio =0.5. Unexpected changes in the angle of the bifurcated spiral regimes are found for moderate values of the a...

As a key parameter, stiffness determines the dynamic characteristics of both bearing and spindle unit. However, interactions between speed, initial preload, cutting force caused by thermal expansion unit components alter during running process. Aiming to carry out real-time online monitoring their effect on machine tool stiffness, fiber Bragg grating (FBG) sensors network was proposed. Further,...

A Fourier domain mode-locked (FDML) laser at 1050 nm for ultra-high-speed optical coherence tomography (OCT) imaging of the human retina is demonstrated. Achievable performance, physical limitations, design rules, and scaling principles for FDML operation and component choice in this wavelength range are discussed. The fiber-based FDML laser operates at a sweep rate of 236 kHz over a 63 nm tuni...

An Increase In The Number Of Cardiac Patients And A Decrease In Number Of HeartDonors Has triggered The Development Of ArtificialHeartPump To Support The ProperFunctioning Of The Heart.This paperPresents Design Of MagneticallyLevitated (Maglev) Axial Magnetic Flux Brushless Direct CurrentMotor (Af-Bldc) For Axial Blood Flow VentricularAssistDevice (Vad).A ventricularassistdevice (VAD) is an ele...