What is the difference between CPET, PET and RPET? CPET, or crystallised polyethylene terephthalate, is a high-performance plastic that is used in the manufacture of food containers. It is a prevalent choice for packaging due to its excellent heat resistance, durability, and barrier properties. ...
Interestingly, the age distribution of mortality by COVID-19 (the distribution of the proportion of deaths per age group among all deaths), is similar between Italy, Japan, and Spain, even though the number of deaths are quite different among them23–25 (Fig. 1). The reported ...
First, based on the broadband that is typical of blast waves, the peak frequency of the P-wave was obtained in the time–frequency domain, taking advantage of the difference in the propagation speed of the P-wave, S-wave, and the surface wave. Second, the phase difference between two ...