Abstract: This paper provides some simulated surface cracks whose shape, size and extension mode are very close to the real cracks to study the validity of the method of using surface waves to ...
Shares of fuel cell technology Plug Power (NASDAQ:PLUG) jumped 7% in the morning session after the company announced it began its first-ever contract with NASA to supply liquid hydrogen. The agreement ...
A crack at a beloved tourist attraction in Yosemite National Park has forced park rangers to close several popular trails and issue safety warnings to visitors. The rapidly-growing crack on the ...
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