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Los Angeles City Hall. / 34.0536; -118.2430. Los Angeles City Hall, completed in 1928, is the center of the government of the city of Los Angeles, California, and houses the mayor's office and the meeting chambers and offices of the Los Angeles City Council. [5] It is located in the Civic Center district of downtown Los Angeles in the city ...
Description. The Hall of Records was estimated to cost $13.7 million in 1961. Counter proposals were made by the Los Angeles County Chief Administrative Officer to preserve the old Hall of Records and move it to the Temple Street location, however, it was estimated that the cost of moving the building would be prohibitively high--$1.5 million ...
Ultrasonic cavitation device is a surgical device using low frequency ultrasound energy to dissect or fragment tissues with low fiber content. It is basically an ultrasound probe (acoustic vibrator) combined with an aspirator device ( suction ). [1] It is mainly used for tissues with high water content and low fiber content, like noncirrhotic ...
Sonochemistry. In chemistry, the study of sonochemistry is concerned with understanding the effect of ultrasound in forming acoustic cavitation in liquids, resulting in the initiation or enhancement of the chemical activity in the solution. [1] Therefore, the chemical effects of ultrasound do not come from a direct interaction of the ultrasonic ...
Description Los Angeles City Hall (color) edit1.jpg. West facade of the Los Angeles City Hall — in Downtown Los Angeles, California. In process of seismic upgrading, this 1928 high-rise building was placed atop a mechanical system of isolators, sliders, and dampers called " base isolation technology ". It is the tallest base-isolated ...
Sonoluminescence. Sonoluminescence is the emission of light from imploding bubbles in a liquid when excited by sound. Sonoluminescence was first discovered in 1934 at the University of Cologne. It occurs when a sound wave of sufficient intensity induces a gaseous cavity within a liquid to collapse quickly, emitting a burst of light.
Ultrasonic cavitation inception will occur when the acceleration of the ultrasound source is enough to produce the needed pressure drop. This pressure drop depends on the value of the acceleration and the size of the affected volume by the pressure wave. The dimensionless number that predicts ultrasonic cavitation is the Garcia-Atance number.
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