A cross-slot-coupled dual-band circularly polarized rectangular dielectric resonator antenna (RDRA) with a small frequency ratio (1.23) based on compass navigation satellite system (CNSS) applications ...

Variation in pregnancy duration in 309 749 singleton pregnancies according to certain LMP (red line) and spontaneous start of labour in 1999 – 2010 (median length 283 days). The yellow line shows the ...

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