منابع مشابه
High-speed observation of acoustic cavitation erosion in multibubble systems.
Cleaning and erosion of objects by ultrasound in liquids are caused by the action of acoustic cavitation bubbles. Experiments have been performed with respect to the erosive effect of multibubble structures on painted glass surfaces and on aluminium foils in an ultrasonic standing wave field at 40 kHz. High-speed imaging techniques have been employed to investigate the mechanisms at work, in pa...
متن کاملObservation of cavitation in a mechanical heart valve in a total artificial heart.
Recently, cavitation on the surface of mechanical heart valves has been studied as a cause of fractures occurring in implanted mechanical heart valves. The cause of cavitation in mechanical heart valves was investigated using the 25 mm Medtronic Hall valve and the 23 mm Omnicarbon valve. Closing of these valves in the mitral position was simulated in an electrohydraulic totally artificial heart...
متن کاملRAMBO: Run-Time Packer Analysis with Multiple Branch Observation
Run-time packing is a technique employed by malware authors in order to conceal (e.g., encrypt) malicious code and recover it at run-time. In particular, some run-time packers only decrypt individual regions of code on demand, re-encrypting them again when they are not running. This technique is known as shifting decode frames and it can greatly complicate malware analysis. The first solution t...
متن کاملBreakthrough Technologies In Vivo Observation of Cavitation and Embolism Repair Using Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) was used to noninvasively monitor the status of individual xylem vessels in the stem of an intact, transpiring grape (Vitis vinifera) plant over a period of approximately 40 h. Proton density-weighted MRI was used to visualize the distribution of mobile water in the stem and individual xylem vessels were scored as either water or gas filled (i.e. embolized). The...
متن کاملCavitation Inception Witnessed by Sound Pressure Level Both in Model Test and Prototype Observation
Abstract The paper concerns with the relationship between cavitation inception бi and sound pressure level (SPL). A case study of Xiaolangdi Hydro-project has been taken as a typical example, which demonstrates the standard criterion of SPL indicating cavitation inception. Cavitation inception of an orifice plate used for energy dissipation in a tunnel spillway has been witnessed and verified b...
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ژورنال
عنوان ژورنال: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
سال: 1986
ISSN: 0387-5016,1884-8346
DOI: 10.1299/kikaib.52.2317