An active calibrated attenuator which can be used with existing medical ultrasound pulse-echo systems is presented. Accurate signal attenuation over a 122-dB range is performed on signals of ...

It created an about two-meter-wide narrow "alley" between the houses. More than 30 decades later in modern China, Tongcheng has become a national historical and cultural city, a statement released by ...

Dozens of people came out to Community Board 13’s first in-person meeting in months at Next City Church in Bellerose on Monday.Despite tension surrounding one member’s advocacy to have in-person ...