A virtual sensor is developed for the online estimation of needle tip deflection during permanent interstitial brachytherapy needle insertion. Permanent interstitial brachytherapy is an effective, minimally invasive, and patient friendly cancer treatment procedure. The deflection of the needles used in the procedure, however, undermines the treatment efficiency and, therefore, needs to be minim...

The prediction of cutting forces is critical for the control and optimization machining processes. This paper concerned with developing model in micro-grinding. approach based on probabilistic distribution undeformed chip thickness. a function process kinematics, properties workpiece, micro-topography grinding tool. A Rayleigh probability density used to determine maximum thickness as an indepe...

The effect of the temperature variation on a unimorph piezoelectric cantilever is studied. Its influences on the thermal expansion, the piezoelectric constant, the transient part and the creep are experimentally analyzed. Afterwards, a H∞ controller is synthesized in order to reject the thermal disturbance and to reach performances required in micromanipulation. Finally, the closed-loop experim...

Biomaterials are low cost,easily transportable and biodegradable with time.Few exampls are cellulose,chitoson and gelatin. Here we used cellulose as a base material for designing box type sensor using Comsol Tool for the detection of bio-analytes such as engine oil,ethnal,gasoline and mercury.Results shown that differential deflection and resonant frequency as found among tested analytes.Highes...

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Title of the Master-Thesis Development of a Surgical Assistant System for Needle Adjustment in Prostate Brachytherapy Author: 1. Examiner: 2. Examiner: Semester: Thomas Lehmann Prof. Dr.-Ing. Bernhard Vondenbusch, Hochschule Furtwangen University Mahdi Tavakoli, PhD, University of Alberta BME 3 Abstract: The prototype of a robotic surgical assistant system was developed for prostate brachythera...

this article studied static deflection, natural frequency and nonlinear vibration of a clamped-clamped microbeam under discontinues electrostatic actuation. the electrostatic actuation was induced by applying ac-dc voltage between the microbeam and electrode plate. in contrast to previous works, it was assumed that length of the electrode plate was smaller than that of the microbeam. in additio...