X-Ray radiation units used at Purdue University may be classified as either analytical or diagnostic. Both types of systems are sources of ionization radiation when they are operational; therefore, ...

After a six-month stint taking cloud and aerosol measurements at Point Reyes National Seashore on the California coast, a mobile suite of climate monitoring equipment was moved to Niamey, Niger, in ...

TOKYO — Readings Monday from robots that entered two crippled buildings at Japan’s tsunami-flooded nuclear plant for the first time in more than a month showed a harsh environment still too ...