The present paper describes a testing method for five-axis machining centers using three-dimensional circular interpolation movement equivalent to cone-frustum cutting. In the present paper, the test conditions, such as the half apex angle of cone-frustum and the sensitive directions of the ball bar device were investigated. In addition, the sensitivity coefficient of each axis was investigated...

Abstract This paper reports on a multi-purpose two-axis micropositioner with sub-nanometer position sensing for precise feedback control. Along each axis it has an electrothermal actuator, a capacitive position sensor and a displacement amplifier that provides a gain of 3.37 for the sensor. It is fabricated from custom SOI wafers using dry etching, and each component is electrically and thermal...

A novel method that uses a small mechanical lever has been developed to directly calibrate the lateral sensitivity of the optical lever in the atomic force microscope (AFM). The mechanical lever can convert the translation into a nanoscale rotation angle with a flexible hinge that provides an accurate conversion between the photodiode voltage output and torsional angle of a cantilever. During t...

purpose : to determine the association between astigmatism and spherical refractive error in a clinical population methods : in this cross-sectional study, 2,000 patients who presented to our optometry clinic were enrolled. all were tested for objective refraction with a nidek ar-310a auto refractometer, and non-cycloplegic refraction. for those under 15 years of age, cycloplegic refraction was...

Ultrahigh resolution two and three-dimensional optical coherence tomography (OCT) imaging was performed using a miniaturized, two-axis scanning catheter based upon microelectromechanical systems (MEMS) mirror technology. The catheter incorporated a custom-designed and fabricated, 1-mm diameter MEMS mirror driven by angular vertical comb (AVC) actuators on both an inner mirror axis and an outer,...

The article presents the results of a field experiment developed controlled attachment device (UNU-3) as part an aggregate with MTZ-1221 tractor and mounted cultivator KON-2.8 provides recommendations for its use. It was found that when using device, range variations in numerical values deviation axis from line set by navigation equipment at speed unit 1.39 m/s to 1.94 ranged 0.08 0.04, which i...

Abstract The line of sight reflects the focus human attention. Gaze estimation technology has a wide range application prospects in human-computer interaction, emotion analysis, commercial advertising, and so on. needs to be jointly determined by eye movement head because gaze is often with movement. In this paper, system implemented monocular camera, using features posture changes estimate poi...

We report the in-plane magnetization reversal behavior of Co2FeSi Heusler alloy free layer in a bottom-pinned magnetic tunnel junction film with 149% TMR. Using magneto-optic indicator imaging, we visualize domain dynamics this buried integrated within full stack. The reveal anisotropic under applied fields. While fields perpendicular to exchange bias direction indicates smooth, coherent rotati...

BACKGROUND In order to confer optimal strength and stiffness to the graft in Anterior Cruciate Ligament (ACL) reconstruction, the maintenance of equal strand tension prior to fixation, is desired; positioning of the tensioning device can significantly affect strand tension This study aimed to determine the effect of tensioning device mal-positioning on individual strand tension in simulated cad...

The article presents an effective new constructive scheme and the principle of operation exhaust device ring spinning machine. mathematical model results solving problem oscillations axis composite squeezing roller drawing apparatus machine have been determined. recommended values parameters are given. Based on analysis research conditions for obtaining high-quality yarn, parameter each rollers...