In this paper, controlling the location of the tip of an L-shape beam under gravity field is investigated. The beam is covered with piezoelectric patches. The gravity filed moves the tip of beam downward and the actuators with induced voltage move the tip to the previous location. to optimize the best location and voltages for actuators, the particle swarm optimization algorithm code is develop...

This study investigates the electronic properties of finite-length armchair carbon nanotubes in an electric field (E) using a single-pi-band tight-binding model. Three different tip configurations are considered, namely, open ends with hydrogen terminations (H-terminations), one end capped with half of C60 fullerene and the other end open with H-terminations, and both ends capped with half of C...

A scanning electrochemical microscopy (SECM) methodology for localized quantitative kinetic studies of electrode reactions based on the tip generation-substrate collection (TG-SC) operation mode is presented. This approach does not use the mediator feedback required in typical kinetic SECM experiments. The reactant is galvanostatically electrogenerated on a tip placed in proximity to the substr...

We present a method to couple surface plasmon polariton (SPP) guiding mode into dielectric-loaded SPP waveguide (DLSPPW) devices with spectral and mode selectivity. The method combined a transmission-mode near-field spectroscopy to excite the SPP mode and a leakage radiation optical microscope for direct visualization. By using a near-field fiber tip, incident photons with different wavelengths...

Films of AOT-capped (AOT = dioctyl sulfosuccinate) cadmium sulfide nanoparticles (Q-CdS) prepared by incorporation into a self-assembled monolayer (SAM) of hexanethiol on Au were prepared. These were imaged at negative substrate bias in air by scanning tunneling microscopy, and Q-CdS particles were shown to cover most of the area on the S A M . Continuous scanning of the tip over the substrate ...

Aerodynamic and aeroacoustic performance experiments were carried out on four- eight bladed, 1.542 m diameter, axial flow cooling fans, with constant solidity hub-to-tip ratio. Tests conducted in an ISO5801, Type A Fan Test facility. The tip gap (TG) was reduced from 4 mm (0.26% fan diameter) to 2 (0.13% diameter), 0 mm, for both configurations. noise profile of each configuration at the same T...

Scanning tunneling microscopy and spectroscopy are used to study InGaP/GaAs heterojunctions with InGaAs-like interfaces. Band offsets are probed using conductance spectra, with tip-induced band bending accounted for using 3-dimensional electrostatic potential simulations together with a planar computation of the tunnel current. Curve fitting of theory to experiment is performed. Using an InGaP ...

Dynamic stall is a phenomenon on the retreating blade of helicopter which can lead to excessive control loads. In order understand dynamic and fill gap between investigations pitching wings full rotor blades, numerical investigation single rotating carried out. The flow phenomena thereupon including Ω-shaped vortex, interaction leading edge vortex with tip newly noticed structure originating in...