Piezoelectric tube scanners are the actuators of choice in scanning probe microscopy. These nanopositioners exhibit a dominant first resonant mode that is excited due to harmonics of the input scan signal. This introduces errors in the scan obtained. The presence of this resonant mode limits the upper bound of a triangular scan rate to around 1/100th of the first mechanical resonance frequency....

The soil remediation at a contaminated site requires knowledge of contaminant transport parameters and processes. This paper presents the determination from column leaching tests in context with two techniques i.e., washing immobilization. To evaluate technique, on polluted were conducted diluted acid solutions hydrochloric acid, ethylene diamine tetraacetic ferric chloride to efficiencies sele...

In this article, the diocotron modes developing in a coaxial diode and resonant magnetron forming six-vane A6 relativistic both fed by split cathode are studied Particle-in-Cell simulations. The is novel type of which sustains column longitudinally oscillating electrons (smooth bore) or over non-emitting axial conductor. connection between longitudinal oscillatory dynamics mode development, as ...

In this paper a resonant tunnelling quantum well infrared photodetector (RT-QWIP) is discussed. Each period of this photodetector structure comprises of a resonant tunnelling structure (AlAs/AlGaAs/AlAs) nearby a quantum well (AlGaAs/GaAs). In this photodetector, photocurrent is produced when an electron makes a transition from the ground state of the well to an excited state which is coupled t...