It is very difficult to shield low frequency sound waves. This is mainly because in order to cause wave scattering or reflection, the usual wisdom is that the size of the scatterers must be on the order of the wavelength. Since low frequency sound has long wavelength, it follows that the shielding m.....
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Gamma Fe2O3 (maghemite), alpha Fe2O3 (hematite) and Fe3O4 (magnetite) are the three commonly used iron oxides. These iron oxides are known to have many important technological applications, including application in the field of clinical medicine and electronics. Two general methods for producing iro.....
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III-nitride compound semiconductors have the merits of wide band gap, high breakdown field, and large thermal conductivity, which results in well designed AlGaN/GaN heterojunction field-effect transistors. This transistor is capable of high temperature operation, suitable for high temperature integr.....
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