As core elements of photoelectric displacement measurement, installation coaxiality and rotation parallelism are the main factors affecting measurement accuracy. When there is a processing error or an offset in process structural elements, plane grating disk will be tilted, which seriously affects accuracy angular measurements. In this study, caused by inclination was analyzed method to elimina...

This paper discusses the design and implementation of two track-following controllers for dual-stage hard disk drive servo systems. The first controller is designed by combining an outer loop sensitivity-decoupling (SD) controller with an inner loop disturbance observer (DOB). The second is designed by combining mixed H2/H∞ synthesis techniques with an add-on integral action. The designed contr...

OBJECTIVE To determine the correspondence between optic disc margins evaluated using disc photography (DP) and optical coherence tomography (OCT). METHODS From May 1, 2005, through November 10, 2005, 17 healthy volunteers (17 eyes) had raster scans (180 frames, 501 samplings per frame) centered on the optic disc taken with stereo-optic DP and high-speed ultrahigh-resolution OCT (hsUHR-OCT). T...

OBJECTIVE This study aimed to determine if occupational exposure to whole-body vibration is associated with cervical intervertebral disc herniation among container truck drivers. METHODS We conducted a walk-through survey among container truck drivers and unexposed workers. We also measured the vibration hazard of the container truck over the driver's back and seat when the driver was loading...

Traumatic disc prolapse in the thoracic region is not common, and is rare above the T3 level. A case of a T1-T2 disc prolapse as a result of rugby injury is described.

The Z-disc is a critical anchoring point for thin filaments as they slide during muscle contraction. Therefore, identifying components of the Z-disc is critical for fully comprehending how myofibrils assemble and function. In the adult Drosophila musculature, the fibrillar indirect flight muscles accumulate a >200 kDa Z-disc protein termed Z(210), the identity of which has to date been unknown....

We demonstrate the microscopic equivalent of a step-stress rheological measurement. An optical torque is applied to a birefringent wax microdisk embedded in gelatin, a highly entangled viscoelastic biopolymer, using circularly polarized laser tweezers. By increasing the laser power and measuring the angular displacement of the disk, we explore the microscopic rheological response of presheared ...

BACKGROUND To investigate the effect of oxygen-ozone (O2-O3) injection on thoracolumbar intervertebral disc herniation (IVDH) in dogs. MATERIALS AND METHODS Ten herniated discs of five dogs were treated with percutaneous injection of an O2-O3 gas mixture with O3 concentration of 32 microg/microl intradiscally (1.5-2 microl) under fluoroscopy guidance. RESULTS Five weeks after treatment, the...

INTRODUCTION Internal derangement (ID) of the temporomandibular joint (TMJ) can cause facial asymmetry. The purposes of this study were to analyze the relationship between facial asymmetry and TMJ ID by using posteroanterior cephalometric variables, and to compare the findings with the results of magnetic resonance imaging (MRI). METHODS The sample consisted of women seeking orthodontic treat...