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Two-section shift-layer DFB lasers are fabricated to realize tunable lasers with high single-mode stability and wavelength converters with reshaping capability. 5.2-nm of wavelength tuning and conversion over 30-THz of input frequencies are demonstrated.
The purposes of this study are to compare the reproducibility of two-dimensional ultrasound (2DUS) and three-dimensional ultrasound (3DUS) in the assessment of fetal liver volume (LV), and to test whether the fetal LV assessed by the traditional method with 2DUS is equal to that with 3DUS in normal pregnancy. If significantly different, we then try to calculate a new constant of fetal LV for the...
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