Megumu Sekiguchi

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To develop a new contour extraction method for identifying abnormal tissue. We combined two techniques: logarithmic K distribution of a scattering model (method 1) and regional discrimination using the characteristics of local ultrasound images (method 2) into an integrated method (method 3) that provides accurate contours, which are essential for(More)
The ages of stellar populations in 52 elliptical and S0 galaxies in the Coma cluster are investigated using a new spectroscopic sample. More than 40% of the S0s are found to have experienced recent star formation in their central regions during the last ∼ 5 Gyrs, while such activity is absent in the ellipticals. Galaxies in this sample have absolute(More)
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