ultrasonic machining (usm) is a mechanical material removal process used to erode holes and cavities in hard or brittle work pieces by using shaped tools, high-frequency and an abrasive slurry. this paper addresses the concept and development of an expert system (es) for hard and brittle material, such as glass, quartz, diamond, carbides, semi conducting materials, ceramic and graphite which ca...

Roth, Norman G. (Whirlpool Corp., St. Joseph, Mich.) and Robert B. Wheaton. Continuity of psychrophilic and mesophilic growth characteristics in the genus Arthrobacter. J. Bacteriol. 83:551-555. 1962.-The effect of temperature on growth of seven members of the genus Arthrobacter was determined at 0, 7, 20, 30, and 37 C. In general, no sharp cutoff point was observed between growth-temperature r...

pain relief by soaking in hot water can be used for women who want to birth their child with minimal medical intervention . this achieved in new division of labor in the hinchinbroke hospital in september 1983 . in this part, control of childbirth pain has done with minimal medical intervention . if consultation of maternity is necessary, have be done in this hospital. midwives and doctors in t...

Nomex honeycomb composites are used extensively in aerospace, automotive, and other industries due to their superior material properties. However, the tool wear during machining can compromise processing accuracy stability of whole process, thus studies on strengthening method urgently needed. This study presents a radial difference calculation (RDC) evaluate disc cutter quantitatively both con...

Background: Mucilage is an important polysaccharide with a broad range of physicochemical properties and antioxidant activity that widely used for various applications in the medicine food industries. Objectives: This study aims to evaluate effect extraction method on mucilage extracted from yellow brown flaxseeds. Methods: was by different methods: heating, sonotrode, bath sonication. The eval...

In this study, a rapid fabrication method was developed to prepare hydrogel structures with high mechanical strength and low attenuation coefficient for ultrasound scanning. Poly acrylic acid (PAA) first prepared via free radical polymerization approach. To shorten the process time (~ 30 min in water bath), microwave heating applied facilitate reaction reduce down 80 s. The produced hydrogels s...

Mango leaf extract has proven to contain flavonoids that serve as antioxidants. In this study, a comparison between traditional maceration and sonication on flavonoid extraction from mango was investigated. The various ratios of ethanol acetone were utilized solvents (1:5, 1:10, 1:15). process, which uses an ultrasonic cleaning bath set at 40 oC, takes 30 minutes contrasted the procedure 36 hou...