Membru din: Sâm Mai 07, 2022 11:22 pm Mesaje: 6210
Science, Special Report, Americas
Like backscatter X-ray machines, millimeter wave scanners produce detailed full-body images of passengers, but they do it with ultrahigh-frequency millimeter wave radiation rather than X-rays. If you went on name alone, you might think "advanced imaging technology machines" could help doctors hunt for tumors or other medical conditions. In reality, the label -- euphemism, if you're cynical -- adopted by the U.S. Transportation Security Administration (TSA) describes the whole-body scanners found at airports that detect weapons, explosives or other threats being carried on passengers. According to the TSA's Web site, the agency had installed 800 advanced imaging technology machines at 200 U.S. November 2012. The machines come in two flavors, based on the type of electromagnetic radiation they use to make a scan. Backscatter machines -- about 30 percent of the installations -- send low-energy X-rays to bounce off a passenger's body. Millimeter wave (mmw) scanners emit energy more akin to microwaves. Both see through clothing to produce a 3-D image of the person standing in the machine.|Pipe Stress Analysis refers to Process of identifying, analysing stresses that are induced in a pipe or members in a piping system which is subjected to either thermal stresses or mechanical stresses. Stresses induced in the pipes might come due to several origins. This may include loads on the pipe, bolting, thermal gradients, pressure exerted on the pipes by flowing fluids, thermal transients etc. There are some systems which are highly sensitive to external loads. This brings the necessity of Pipe Stress Analysis. To keep a system in good and working state, all these stresses induced in the pipes are to be thoroughly analysed along with their predicted outcomes. Gone are the days when stresses induced in the pipes were calculated by noting force components and subsequent calculation of stresses. In this era of digitalization, there are several softwares which ease up this process of calculating all stresses induced in the pipes.
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