Microgroove structures with helical pitches in a wavelength level are increasingly required optical areas. However, conventional manufacturing techniques generate relatively high stresses during pressing, resulting poor precision when forming microgrooves. This paper reports on the mechanism of ultrasonic vibration-assisted microgroove precise hot-pressed glass. A finite element (FE) thermocomp...

This study aims to explain the interaction between results measured in turning operation. For this purpose, Ti 6Al-4V alloy workpiece was machined on CNC lathe. Surface roughness (Ra), vibration and energy consumption values were determined by turning. Experimental analyzed statistically. Response surface method (RSM) grey relational analysis used statistical analysis. In RSM analysis, regressi...

A miniaturized homodyne laser Doppler vibrometer (LDV) with a compact 90° optical hybrid is experimentally demonstrated on a CMOS compatible silicon-on-insulator (SOI) platform. Optical components on this platform usually have inadequate suppressions of spurious reflections, which significantly influence the performance of the LDV. Numerical compensation methods are implemented to effectively d...

Michaelis-Arbuzov reactions of S-aryl disulfide derivatives of 3'-thiothymidine or 5'-thioadenosine with tris(trimethylsilyl) phosphite proceeded in high yields to the corresponding phosphorothiolate monoesters. Subsequent hydrolytic desilylation and phosphate coupling were effected in one-pot using liquid-assisted grinding in a vibration ball mill. Novel 3',5'- and 5',5'-pyrophosphorothiolate-...

Nickel-based superalloys are widely used in the aerospace, automotive, marine and medical sectors, owing to their high mechanical strength corrosion resistance. However, they exhibit poor machinability due low thermal conductivity, shear modulus, strain hardening, etc. Various modifications have been incorporated into existing machining techniques address these issues. One such modification is ...