Stable 3D micromanipulation by light requires that gradient force overcome axial scattering force introduced by an objective lens. Although high numerical aperture (NA) objective lenses in conventional optical tweezers could match the requirement, the dramatic limited axial working range and a narrow view field draw back the application seriously. With purpose to improve the application of micr...

We carry out the effect of the induced magnetic field on peristaltic transport of an incompressible conducting micropolar fluid in a symmetric channel. The flow analysis has been developed for low Reynolds number and long wavelength approximation. Exact solutions have been established for the axial velocity, microrotation component, stream function, magnetic-force function, axialinduced magneti...

The purpose of this study is to investigate bending moment and the axial load capacity of a pressurized pipe suffering from a through-wall circumferential crack repaired by a composite sleeve. The three-dimensional finite element method (FEM) was adopted to compute the results, and the failure assessment diagram (FAD) was employed to investigate the failure behavior of the repaired pipe. The fi...

In an axial flow machine, fluids flow condition, that is flow pattern in a rotating flow passage changes its form and magnitude by the hydraulic resistance to the fluid flow in flow passage. Effect of centrifugal force becomes stronger with the increase of hydraulic resistance, and the flow rate becomes smaller. And, in the comparison of fluids flow condition among different axial flow machines...

As shown three decades ago, in situations where the initial stresses before buckling are not negligible compared to the elastic moduli, the geometrical dependence of the tangential moduli on the initial stresses must be taken into account in stability analysis, and the stability or bifurcation criteria have different forms for tangential moduli associated with different choices of the finite st...

there are different methods used for threshing of grain crops. usual threshers operate based on the impact force (in threshing unit) that may damage the grains. in another method named axial-flow, grain damage is less so these types of the harvesting machines are being used more than before. in this study one of the common rice threshers (model t30) locally made in ashtad company was modified t...

For practical application of force feedback in robotassisted surgical systems, it may not be possible to match the number of degrees of freedom of position sensing and control with the degrees of freedom of force sensing and feedback. The goal of this experimental study is to determine the effect of such sensor/actuator asymmetry during bilateral telemanipulation. We examined the performance of...

The effect of simulated early weight bearing on both micromotion and pullout strength of uncemented distal femoral stems was evaluated in this study. The effect of stem endosteal contact and bone quality on implant pullout strength was also analyzed. A randomized matched-pair study was performed using 8 bilateral pairs of fresh human cadaveric femoral specimens. Each specimen pair was dual-ener...

The source follower circuit is used as a voltage buffer and level shifter. It is more flexible level shifter as the dc value of voltage level can be adjusted by changing aspect ratio of MOSFETs. It is desired to have low output resistance for such applications. Source follower can give minimum output resistance 1/(gm+gmb) with load resistance and channel resistance tending to infinity. The supe...